阅读说明：本技术 一种真空渗碳与压淬一体化处理装置及方法 (Vacuum carburization and pressure quenching integrated treatment device and method ) 是由 战东平 杨永坤 王佳喜 李宇露 王东伟 王荣建 邹涛 雷洪 姜周华 于 2019-11-01 设计创作，主要内容包括：一种真空渗碳与压淬一体化处理装置及方法,装置包括真空渗碳处理单元、压淬处理单元及气氛保护转运通道单元。方法为：将工件送入真空渗碳处理单元的真空渗碳处理罐中,先将罐内抽真空,再将工件加热到渗碳温度,然后对工件进行气态或液态渗碳处理,当工件结束渗碳处理后,向罐内回充气体至标准大气压,开启气氛保护转运通道单元的第一密封门,将工件转移到气氛保护罩内进行缓冷,缓冷结束后将工件返回真空渗碳处理罐中进行加热保温处理,工件完成加热保温后,开启第一和第二密封门,将工件转移到压淬处理单元的压淬处理罐中,再将工件直接送入压淬机内,由压淬机对工件进行装夹固定,然后选择气态或液态冷却剂对工件进行淬火,直至完成压淬处理。(A vacuum carburization and pressure quenching integrated processing device and a method thereof are provided, the device comprises a vacuum carburization processing unit, a pressure quenching processing unit and an atmosphere protection transfer channel unit. The method comprises the following steps: the method comprises the steps of conveying a workpiece into a vacuum carburizing treatment tank of a vacuum carburizing treatment unit, vacuumizing the tank, heating the workpiece to a carburizing temperature, performing gas-state or liquid-state carburizing treatment on the workpiece, returning gas into the tank to a standard atmospheric pressure after the workpiece is carburized, opening a first sealing door of an atmosphere protection transfer channel unit, transferring the workpiece into an atmosphere protection cover for slow cooling, returning the workpiece into the vacuum carburizing treatment tank for heating and heat preservation after the slow cooling is finished, opening first and second sealing doors after the workpiece is heated and heat preserved, transferring the workpiece into a pressure quenching treatment tank of a pressure quenching treatment unit, directly conveying the workpiece into a pressure quenching machine, clamping and fixing the workpiece by the pressure quenching machine, and quenching the workpiece by selecting a gas-state or liquid-state coolant until the pressure quenching treatment is finished.)

1. A vacuum carburization and pressure quenching integrated processing device is characterized in that: including vacuum carburization processing unit, pressure quenching processing unit and atmosphere protection transfer passage unit, vacuum carburization processing unit passes through atmosphere protection transfer passage unit and presses the processing unit that quenches and links to each other, and the work piece carries out the vacuum carburization operation in vacuum carburization processing unit, and the work piece after the vacuum carburization is transported to pressure quenching processing unit by atmosphere protection transfer passage unit in, the work piece is being pressed in quenching processing unit and is quenching the operation.

2. The integrated vacuum carburizing and pressure quenching processing device according to claim 1, characterized in that: the vacuum carburizing treatment unit comprises a vacuum carburizing treatment tank, a first workpiece transfer roller way, a supporting porous plate, a vacuum pump, a gaseous carburizing source, a non-gaseous carburizing source conveyor and a recharging source; the main body of the vacuum carburization treatment tank is of a cylindrical structure, the top and the bottom of the vacuum carburization treatment tank are of conical structures, a vacuum extraction opening is formed in a conical section tank body at the top of the vacuum carburization treatment tank, an extraction end of a vacuum pump is communicated with the vacuum extraction opening, an exhaust end of the vacuum pump is communicated with the atmosphere, and a vacuum degree barometer is installed on a pipeline between the extraction end of the vacuum pump and the vacuum extraction opening; the supporting air-permeable hole plate is horizontally and fixedly arranged at the lower end of the cylindrical section of the vacuum carburizing treatment tank, the first workpiece transfer roller way is horizontally arranged on the upper surface of the supporting air-permeable hole plate, a heater is arranged on the vacuum carburizing treatment tank body below the supporting air-permeable hole plate, and a temperature thermocouple is arranged on the lower surface of the supporting air-permeable hole plate; a workpiece discharge port is formed in the vacuum carburizing treatment tank body corresponding to the discharge end of the first workpiece transfer roller way, and a feeding door is mounted on the vacuum carburizing treatment tank body on the side of the workpiece discharge port; the tip of the bottom conical section of the vacuum carburization treatment tank is provided with a gaseous carburization source input port, and the gaseous carburization source is communicated with the gaseous carburization source input port through a first valve; the non-gaseous carburizing source conveyor is arranged on the cylindrical section tank body of the vacuum carburizing treatment tank, the non-gaseous carburizing source is communicated with the non-gaseous carburizing source conveyor through a second valve, and the discharge end of the non-gaseous carburizing source conveyor is positioned right above the first workpiece transfer roller way; the tip of the top conical section of the vacuum carburization treatment tank is provided with a reinflation inlet, and the reinflation source is communicated with the reinflation inlet through a third valve; an oxygen probe is arranged on the cylindrical section tank body of the vacuum carburization treatment tank, and the oxygen probe is externally connected with a carbon potential controller; and a dispersion fan is arranged at the top of the cylindrical section of the vacuum carburization treatment tank.

3. The integrated vacuum carburizing and pressure quenching processing device according to claim 2, characterized in that: the atmosphere protection transfer channel unit comprises an atmosphere protection cover, a second workpiece transfer roller way, a first sealing door, a second sealing door and an atmosphere protection gas source; the atmosphere protection cover adopts a closed pipeline structure, is horizontally arranged, and is hermetically connected with a workpiece discharge port of the vacuum carburization treatment tank at one end; the second workpiece transfer roller way is horizontally arranged on the upper surface of the atmosphere protection cover bottom plate, and the feeding end of the second workpiece transfer roller way is connected with the discharging end of the first workpiece transfer roller way; the first sealing door is arranged at a pipe orifice at the feeding end of the atmosphere protection cover, and the second sealing door is arranged at a pipe orifice at the discharging end of the atmosphere protection cover; an atmosphere protective gas input port is formed in the top plate of the atmosphere protective cover, and the atmosphere protective gas source is communicated with the atmosphere protective gas input port through a fourth valve; the atmosphere protection cover adopts a multilayer composite structure, the inner layer of the atmosphere protection cover is a refractory material layer, the middle layer of the atmosphere protection cover is a heat insulation material layer, and the outer layer of the atmosphere protection cover is a rigid framework layer.

4. The integrated vacuum carburizing and pressure quenching processing device according to claim 3, characterized in that: the pressure quenching treatment unit comprises a pressure quenching treatment tank, a pressure quenching machine, a gaseous coolant storage tank, a liquid coolant storage tank, an exhaust pump and a third workpiece transfer roller way; the pressure quenching treatment tank is of a square structure, a hydraulic base is mounted on a bottom plate of the pressure quenching treatment tank, the pressure quenching machine is mounted on the upper surface of the hydraulic base, a workpiece feeding hole is formed in the pressure quenching treatment tank in front of the pressure quenching machine, and a material taking door is formed in the pressure quenching treatment tank behind the pressure quenching machine; the third workpiece transfer roller way is arranged between the pressure quenching machine and the workpiece feeding hole, the feeding end of the third workpiece transfer roller way is connected with the discharging end of the second workpiece transfer roller way, and the discharging end of the third workpiece transfer roller way is connected with the pressure quenching machine; the top of the pressure quenching machine is respectively provided with a gaseous coolant input port and a liquid coolant input port, and the bottom of the pressure quenching machine is respectively provided with a gaseous coolant output port and a liquid coolant output port; the gas coolant input port is communicated with a gas coolant storage tank through a fifth valve, the gas coolant output port is communicated with the air inlet end of the exhaust pump, and the air outlet end of the exhaust pump is communicated with the atmosphere; the liquid coolant input port is communicated with a liquid outlet of the liquid coolant storage tank through a sixth valve, and the liquid coolant output port is communicated with a liquid return port of the liquid coolant storage tank.

5. The integrated vacuum carburizing and pressure quenching processing device according to claim 4, characterized in that: the gaseous carburizing source comprises coal gas, natural gas, or propane gas; the non-gaseous carburization source comprises kerosene, acetone, or methanol; the recharge gas source comprises compressed air or an inert gas; the atmosphere protection gas source comprises argon or nitrogen; the gaseous coolant stored in the gaseous coolant storage tank comprises compressed air or an inert gas; the liquid coolant stored in the liquid coolant storage tank includes water or oil; the number of the gaseous carbon infiltration source, the non-gaseous carbon infiltration source, the backfilling gas source, the atmosphere protection gas source, the gaseous coolant storage tank and the liquid coolant storage tank is at least two.

6. A vacuum carburization and pressure quenching integrated processing method which adopts the vacuum carburization and pressure quenching integrated processing device of claim 1 is characterized by comprising the following steps:

the method comprises the following steps: opening a feeding door, feeding the workpiece into a vacuum carburizing treatment tank, placing the workpiece on a first workpiece transfer roller way, and simultaneously enabling the workpiece to be positioned right below the discharge end of a non-gaseous carburizing source conveyor;

step two: closing the feeding door, starting the vacuum pump, and vacuumizing the interior of the vacuum carburization treatment tank until the vacuum degree barometer displays that the interior of the vacuum carburization treatment tank meets the set vacuum degree requirement; simultaneously starting a carbon potential controller until the carbon potential data measured by the oxygen probe meets the requirement of a set value;

step three: starting a heater to perform induction heating on the workpiece until the real-time temperature measured by the temperature thermocouple reaches the set carburizing temperature requirement;

step four: selecting a gaseous carbon infiltration source or a liquid carbon infiltration source according to the needs of carburization treatment; when a gaseous carburizing source is selected, a first valve is opened, carburizing gas enters a vacuum carburizing treatment tank through the first valve and a gaseous carburizing source input port in sequence, a dispersion fan is started simultaneously, and the gas carburizing treatment of the workpiece is completed according to the set strong carburizing time and diffusion carburizing time; when a liquid carburizing source is selected, a second valve is opened, carburizing liquid is sprayed onto the workpiece through the second valve and the non-gaseous carburizing source conveyor in sequence, and liquid carburizing treatment of the workpiece is completed according to the set strong carburizing time and diffusion carburizing time;

step five: after the workpiece is carburized, a third valve is opened, a recharge gas in a recharge gas source sequentially passes through the third valve and a recharge gas inlet and enters a vacuum carburization treatment tank until the gas pressure in the vacuum carburization treatment tank is restored to the standard atmospheric pressure;

step six: opening a fourth valve, and enabling the atmosphere protection gas in the atmosphere protection gas source to enter the atmosphere protection cover through the fourth valve and an atmosphere protection gas input port in sequence;

step seven: according to the carburizing quality requirement of the workpiece, the workpiece is selected to be slowly cooled or directly subjected to pressure quenching; when the slow cooling treatment is selected to be carried out on the workpiece, the first sealing door is firstly opened, the workpiece is transferred to the second workpiece transfer roller way by the first workpiece transfer roller way, and the workpiece is completely moved into the atmosphere protection cover by the second workpiece transfer roller way, then the first sealing door is closed to slowly cool the workpiece in the atmosphere protection cover until the workpiece is slowly cooled to a set temperature, the first sealing door is opened again, the slowly cooled workpiece is moved back to the vacuum carburizing treatment tank again, then the first sealing door is closed again, the heater is started at the same time, induction heating is carried out on the workpiece until the workpiece is reheated to a set temperature and is kept warm for a set time, then a first sealing door and a second sealing door are opened simultaneously, the heated and kept warm workpiece is moved to a third workpiece transfer roller way through a first workpiece transfer roller way and a second workpiece transfer roller way in sequence, and finally enters a pressure quenching treatment tank; when the workpiece is selected to be directly subjected to pressure quenching treatment, a first sealing door and a second sealing door are opened simultaneously, the workpiece subjected to carburization treatment is moved to a third workpiece transfer roller way sequentially through a first workpiece transfer roller way and a second workpiece transfer roller way, and finally enters a pressure quenching treatment tank;

step eight: after the workpiece is transferred onto a third workpiece transfer roller way, the first sealing door and the second sealing door are closed, then the workpiece is directly sent into the pressure quenching machine through the third workpiece transfer roller way, and the clamping and fixing of the workpiece are completed through the pressure quenching machine;

step nine: after the workpiece is clamped and fixed in a pressure quenching machine, selecting a gaseous coolant or a liquid coolant according to the pressure quenching treatment requirement; when the gaseous coolant is selected, the fifth valve is opened, the gaseous coolant in the gaseous coolant storage tank sequentially enters the pressure quenching machine through the fifth valve and the gaseous coolant input port, workpieces in the pressure quenching machine are quenched through the gaseous coolant, the quenched gaseous coolant is discharged from the gaseous coolant output port, and finally the gaseous coolant is discharged into the atmosphere through the exhaust pump; when the liquid coolant is selected, the sixth valve is opened, the liquid coolant in the liquid coolant storage tank sequentially enters the pressure quenching machine through the sixth valve and the liquid coolant input port, workpieces in the pressure quenching machine are quenched through the liquid coolant, and the quenched liquid coolant directly returns to the liquid coolant storage tank through the liquid coolant output port to complete circulation of the liquid coolant;

step ten: after the pressure quenching treatment of the workpiece is finished in the pressure quenching machine, firstly, the clamping and fixing of the pressure quenching machine on the workpiece are released, then, the material taking door is opened, the workpiece in the pressure quenching machine is moved out of the pressure quenching treatment tank, and at the moment, the vacuum carburization and pressure quenching integrated treatment of the workpiece is completely finished.

Technical Field

The invention belongs to the technical field of heat treatment of metal materials, and particularly relates to a vacuum carburizing and pressure quenching integrated treatment device and method.

Background

Vacuum carburization means that a carburization medium is introduced into a high-temperature container under a low-pressure vacuum state so as to achieve the purpose of uniformly carburizing metal materials. The pressure quenching is that in the rapid cooling process, a certain pressure is applied to the metal material by using a clamp so as to prevent the stress release from influencing the appearance of the metal material and meet the requirement of the metal material on the flatness.

At the present stage, most of vacuum carburizing equipment and pressure quenching equipment are independent equipment, the functions of the equipment are single, and the continuous treatment of vacuum carburizing and pressure quenching can not be carried out on metal materials, so that the treatment quality and the treatment efficiency of the metal materials are lower.

Therefore, the Chinese patent application with the publication number of CN109055944A discloses a double-row continuous carburizing and press quenching production line for bevel gear heat treatment and a production process thereof, wherein a robot capable of rotating 360 degrees is arranged between a quenching press and a press quenching heat preservation furnace, and the robot is used for transferring a workpiece between the quenching press and the press quenching heat preservation furnace. However, since there is no atmosphere protection during the transferring process of the workpiece, the oxidation and heat loss of the workpiece during the transferring process cannot be avoided, and the quality of the workpiece is affected even though the oxidation time and the heat dissipation time are short.

The chinese patent application with publication number CN110004277A discloses a high-pressure gas-quenching salt bath austempering three-chamber vacuum furnace and a use method thereof, wherein the three-chamber vacuum furnace composed of a gas quenching chamber, a heating chamber and a salt bath chamber is adopted, and although the three-chamber vacuum furnace can meet different heat treatment process requirements, the three-chamber vacuum furnace cannot meet a liquid pressure quenching heat treatment process with a higher deformation requirement.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a vacuum carburization and pressure quenching integrated processing device and a method, wherein an atmosphere protection transfer channel unit is arranged between a vacuum carburization processing unit and a pressure quenching processing unit, a workpiece can be transferred into the pressure quenching processing unit from the vacuum carburization processing unit only through the atmosphere protection transfer channel unit, the oxidation and heat loss of the workpiece in the transfer process are effectively avoided, and meanwhile, the atmosphere protection transfer channel unit can also be used as a slow cooling chamber of the workpiece to improve the carburization quality of the workpiece.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a vacuum carburization and pressure are quenched integrated processing apparatus, includes vacuum carburization processing unit, presses and is quenched processing unit and atmosphere protection and transport the passageway unit, the vacuum carburization processing unit is transported the passageway unit through atmosphere protection and is linked to each other with pressing and quenching processing unit, and the work piece carries out the vacuum carburization operation in vacuum carburization processing unit, and the work piece after the vacuum carburization is transported to pressing and is quenched processing unit by atmosphere protection and is transported the passageway unit, and the work piece is pressed and is quenched the operation in pressing and quenching processing unit.

The vacuum carburizing treatment unit comprises a vacuum carburizing treatment tank, a first workpiece transfer roller way, a supporting porous plate, a vacuum pump, a gaseous carburizing source, a non-gaseous carburizing source conveyor and a recharging source; the main body of the vacuum carburization treatment tank is of a cylindrical structure, the top and the bottom of the vacuum carburization treatment tank are of conical structures, a vacuum extraction opening is formed in a conical section tank body at the top of the vacuum carburization treatment tank, an extraction end of a vacuum pump is communicated with the vacuum extraction opening, an exhaust end of the vacuum pump is communicated with the atmosphere, and a vacuum degree barometer is installed on a pipeline between the extraction end of the vacuum pump and the vacuum extraction opening; the supporting air-permeable hole plate is horizontally and fixedly arranged at the lower end of the cylindrical section of the vacuum carburizing treatment tank, the first workpiece transfer roller way is horizontally arranged on the upper surface of the supporting air-permeable hole plate, a heater is arranged on the vacuum carburizing treatment tank body below the supporting air-permeable hole plate, and a temperature thermocouple is arranged on the lower surface of the supporting air-permeable hole plate; a workpiece discharge port is formed in the vacuum carburizing treatment tank body corresponding to the discharge end of the first workpiece transfer roller way, and a feeding door is mounted on the vacuum carburizing treatment tank body on the side of the workpiece discharge port; the tip of the bottom conical section of the vacuum carburization treatment tank is provided with a gaseous carburization source input port, and the gaseous carburization source is communicated with the gaseous carburization source input port through a first valve; the non-gaseous carburizing source conveyor is arranged on the cylindrical section tank body of the vacuum carburizing treatment tank, the non-gaseous carburizing source is communicated with the non-gaseous carburizing source conveyor through a second valve, and the discharge end of the non-gaseous carburizing source conveyor is positioned right above the first workpiece transfer roller way; the tip of the top conical section of the vacuum carburization treatment tank is provided with a reinflation inlet, and the reinflation source is communicated with the reinflation inlet through a third valve; an oxygen probe is arranged on the cylindrical section tank body of the vacuum carburization treatment tank, and the oxygen probe is externally connected with a carbon potential controller; and a dispersion fan is arranged at the top of the cylindrical section of the vacuum carburization treatment tank.

The atmosphere protection transfer channel unit comprises an atmosphere protection cover, a second workpiece transfer roller way, a first sealing door, a second sealing door and an atmosphere protection gas source; the atmosphere protection cover adopts a closed pipeline structure, is horizontally arranged, and is hermetically connected with a workpiece discharge port of the vacuum carburization treatment tank at one end; the second workpiece transfer roller way is horizontally arranged on the upper surface of the atmosphere protection cover bottom plate, and the feeding end of the second workpiece transfer roller way is connected with the discharging end of the first workpiece transfer roller way; the first sealing door is arranged at a pipe orifice at the feeding end of the atmosphere protection cover, and the second sealing door is arranged at a pipe orifice at the discharging end of the atmosphere protection cover; an atmosphere protective gas input port is formed in the top plate of the atmosphere protective cover, and the atmosphere protective gas source is communicated with the atmosphere protective gas input port through a fourth valve; the atmosphere protection cover adopts a multilayer composite structure, the inner layer of the atmosphere protection cover is a refractory material layer, the middle layer of the atmosphere protection cover is a heat insulation material layer, and the outer layer of the atmosphere protection cover is a rigid framework layer.

The pressure quenching treatment unit comprises a pressure quenching treatment tank, a pressure quenching machine, a gaseous coolant storage tank, a liquid coolant storage tank, an exhaust pump and a third workpiece transfer roller way; the pressure quenching treatment tank is of a square structure, a hydraulic base is mounted on a bottom plate of the pressure quenching treatment tank, the pressure quenching machine is mounted on the upper surface of the hydraulic base, a workpiece feeding hole is formed in the pressure quenching treatment tank in front of the pressure quenching machine, and a material taking door is formed in the pressure quenching treatment tank behind the pressure quenching machine; the third workpiece transfer roller way is arranged between the pressure quenching machine and the workpiece feeding hole, the feeding end of the third workpiece transfer roller way is connected with the discharging end of the second workpiece transfer roller way, and the discharging end of the third workpiece transfer roller way is connected with the pressure quenching machine; the top of the pressure quenching machine is respectively provided with a gaseous coolant input port and a liquid coolant input port, and the bottom of the pressure quenching machine is respectively provided with a gaseous coolant output port and a liquid coolant output port; the gas coolant input port is communicated with a gas coolant storage tank through a fifth valve, the gas coolant output port is communicated with the air inlet end of the exhaust pump, and the air outlet end of the exhaust pump is communicated with the atmosphere; the liquid coolant input port is communicated with a liquid outlet of the liquid coolant storage tank through a sixth valve, and the liquid coolant output port is communicated with a liquid return port of the liquid coolant storage tank.

The gaseous carburizing source comprises coal gas, natural gas, or propane gas; the non-gaseous carburization source comprises kerosene, acetone, or methanol; the recharge gas source comprises compressed air or an inert gas; the atmosphere protection gas source comprises argon or nitrogen; the gaseous coolant stored in the gaseous coolant storage tank comprises compressed air or an inert gas; the liquid coolant stored in the liquid coolant storage tank includes water or oil; the number of the gaseous carbon infiltration source, the non-gaseous carbon infiltration source, the backfilling gas source, the atmosphere protection gas source, the gaseous coolant storage tank and the liquid coolant storage tank is at least two.

A vacuum carburization and pressure quenching integrated processing method adopts the vacuum carburization and pressure quenching integrated processing device, and comprises the following steps:

the method comprises the following steps: opening a feeding door, feeding the workpiece into a vacuum carburizing treatment tank, placing the workpiece on a first workpiece transfer roller way, and simultaneously enabling the workpiece to be positioned right below the discharge end of a non-gaseous carburizing source conveyor;

step two: closing the feeding door, starting the vacuum pump, and vacuumizing the interior of the vacuum carburization treatment tank until the vacuum degree barometer displays that the interior of the vacuum carburization treatment tank meets the set vacuum degree requirement; simultaneously starting a carbon potential controller until the carbon potential data measured by the oxygen probe meets the requirement of a set value;

step three: starting a heater to perform induction heating on the workpiece until the real-time temperature measured by the temperature thermocouple reaches the set carburizing temperature requirement;

step four: selecting a gaseous carbon infiltration source or a liquid carbon infiltration source according to the needs of carburization treatment; when a gaseous carburizing source is selected, a first valve is opened, carburizing gas enters a vacuum carburizing treatment tank through the first valve and a gaseous carburizing source input port in sequence, a dispersion fan is started simultaneously, and the gas carburizing treatment of the workpiece is completed according to the set strong carburizing time and diffusion carburizing time; when a liquid carburizing source is selected, a second valve is opened, carburizing liquid is sprayed onto the workpiece through the second valve and the non-gaseous carburizing source conveyor in sequence, and liquid carburizing treatment of the workpiece is completed according to the set strong carburizing time and diffusion carburizing time;

step five: after the workpiece is carburized, a third valve is opened, a recharge gas in a recharge gas source sequentially passes through the third valve and a recharge gas inlet and enters a vacuum carburization treatment tank until the gas pressure in the vacuum carburization treatment tank is restored to the standard atmospheric pressure;

step six: opening a fourth valve, and enabling the atmosphere protection gas in the atmosphere protection gas source to enter the atmosphere protection cover through the fourth valve and an atmosphere protection gas input port in sequence;

step seven: according to the carburizing quality requirement of the workpiece, the workpiece is selected to be slowly cooled or directly subjected to pressure quenching; when the slow cooling treatment is selected to be carried out on the workpiece, the first sealing door is firstly opened, the workpiece is transferred to the second workpiece transfer roller way by the first workpiece transfer roller way, and the workpiece is completely moved into the atmosphere protection cover by the second workpiece transfer roller way, then the first sealing door is closed to slowly cool the workpiece in the atmosphere protection cover until the workpiece is slowly cooled to a set temperature, the first sealing door is opened again, the slowly cooled workpiece is moved back to the vacuum carburizing treatment tank again, then the first sealing door is closed again, the heater is started at the same time, induction heating is carried out on the workpiece until the workpiece is reheated to a set temperature and is kept warm for a set time, then a first sealing door and a second sealing door are opened simultaneously, the heated and kept warm workpiece is moved to a third workpiece transfer roller way through a first workpiece transfer roller way and a second workpiece transfer roller way in sequence, and finally enters a pressure quenching treatment tank; when the workpiece is selected to be directly subjected to pressure quenching treatment, a first sealing door and a second sealing door are opened simultaneously, the workpiece subjected to carburization treatment is moved to a third workpiece transfer roller way sequentially through a first workpiece transfer roller way and a second workpiece transfer roller way, and finally enters a pressure quenching treatment tank;

step eight: after the workpiece is transferred onto a third workpiece transfer roller way, the first sealing door and the second sealing door are closed, then the workpiece is directly sent into the pressure quenching machine through the third workpiece transfer roller way, and the clamping and fixing of the workpiece are completed through the pressure quenching machine;

step nine: after the workpiece is clamped and fixed in a pressure quenching machine, selecting a gaseous coolant or a liquid coolant according to the pressure quenching treatment requirement; when the gaseous coolant is selected, the fifth valve is opened, the gaseous coolant in the gaseous coolant storage tank sequentially enters the pressure quenching machine through the fifth valve and the gaseous coolant input port, workpieces in the pressure quenching machine are quenched through the gaseous coolant, the quenched gaseous coolant is discharged from the gaseous coolant output port, and finally the gaseous coolant is discharged into the atmosphere through the exhaust pump; when the liquid coolant is selected, the sixth valve is opened, the liquid coolant in the liquid coolant storage tank sequentially enters the pressure quenching machine through the sixth valve and the liquid coolant input port, workpieces in the pressure quenching machine are quenched through the liquid coolant, and the quenched liquid coolant directly returns to the liquid coolant storage tank through the liquid coolant output port to complete circulation of the liquid coolant;

step ten: after the pressure quenching treatment of the workpiece is finished in the pressure quenching machine, firstly, the clamping and fixing of the pressure quenching machine on the workpiece are released, then, the material taking door is opened, the workpiece in the pressure quenching machine is moved out of the pressure quenching treatment tank, and at the moment, the vacuum carburization and pressure quenching integrated treatment of the workpiece is completely finished.

The invention has the beneficial effects that:

according to the vacuum carburizing and pressure quenching integrated treatment device and method, the atmosphere protection transfer channel unit is arranged between the vacuum carburizing treatment unit and the pressure quenching treatment unit, and the workpiece can be moved into the pressure quenching treatment unit from the vacuum carburizing treatment unit only through the atmosphere protection transfer channel unit, so that oxidation and heat loss of the workpiece in the transfer process are effectively avoided, and meanwhile, the atmosphere protection transfer channel unit can also be used as a slow cooling chamber of the workpiece to improve the carburizing quality of the workpiece.

Drawings

FIG. 1 is a schematic structural view of a vacuum carburizing and pressure quenching integrated processing device of the present invention;

in the figure, 1-a vacuum carburizing treatment tank, 2-a first workpiece transfer roller way, 3-a supporting porous plate, 4-a vacuum pump, 5-a gaseous carburizing source, 6-a non-gaseous carburizing source, 7-a non-gaseous carburizing source conveyor, 8-a backfilling gas source, 9-a vacuum pumping port, 10-a vacuum degree barometer, 11-a heater, 12-a temperature thermocouple, 13-a workpiece discharging port, 14-a feeding gate, 15-a gaseous carburizing source input port, 16-a first valve, 17-a second valve, 18-a backfilling gas input port, 19-a third valve, 20-an oxygen probe, 21-a carbon potential controller, 22-a dispersion fan, 23-an atmosphere protective cover, 24-a second workpiece transfer roller way, 25-a first sealing gate, 26-a second sealing gate, 27-an atmosphere protective gas source, 28-an atmosphere protective gas input port, 29-a fourth valve, 30-a pressure quenching treatment tank, 31-a pressure quenching machine, 32-gaseous coolant storage tank, 33-liquid coolant storage tank, 34-exhaust pump, 35-third workpiece transfer roller way, 36-hydraulic base, 37-workpiece feed inlet, 38-material taking door, 39-gaseous coolant input port, 40-liquid coolant input port, 41-gaseous coolant output port, 42-liquid coolant output port, 43-fifth valve, 44-sixth valve, and 45-workpiece.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

As shown in fig. 1, a vacuum carburization and pressure quenching integrated processing device comprises a vacuum carburization processing unit, a pressure quenching processing unit and an atmosphere protection transfer channel unit, wherein the vacuum carburization processing unit is connected with the pressure quenching processing unit through the atmosphere protection transfer channel unit, a workpiece 45 is subjected to vacuum carburization in the vacuum carburization processing unit, the workpiece 45 subjected to vacuum carburization is transferred to the pressure quenching processing unit through the atmosphere protection transfer channel unit, and the workpiece 45 is subjected to pressure quenching in the pressure quenching processing unit.

The vacuum carburization processing unit comprises a vacuum carburization processing tank 1, a first workpiece transfer roller way 2, a supporting porous plate 3, a vacuum pump 4, a gaseous carbon infiltration source 5, a non-gaseous carbon infiltration source 6, a non-gaseous carbon infiltration source conveyor 7 and a backfilling gas source 8; the main body of the vacuum carburization treatment tank 1 is of a cylindrical structure, the top and the bottom of the vacuum carburization treatment tank 1 are of conical structures, a vacuum extraction opening 9 is formed in a conical section tank body at the top of the vacuum carburization treatment tank 1, an extraction end of the vacuum pump 4 is communicated with the vacuum extraction opening 9, an exhaust end of the vacuum pump 4 is communicated with the atmosphere, and a vacuum degree barometer 10 is installed on a pipeline between the extraction end of the vacuum pump 4 and the vacuum extraction opening 9; the supporting air-permeable hole plate 3 is horizontally and fixedly arranged at the lower end of the cylindrical section of the vacuum carburizing treatment tank 1, the first workpiece transfer roller way 2 is horizontally arranged on the upper surface of the supporting air-permeable hole plate 3, a heater 11 is arranged on the tank body of the vacuum carburizing treatment tank 1 below the supporting air-permeable hole plate 3, and a temperature thermocouple 12 is arranged on the lower surface of the supporting air-permeable hole plate 3; a workpiece discharge port 13 is formed in the tank body of the vacuum carburizing treatment tank 1 corresponding to the discharge end of the first workpiece transfer roller way 2, and a feeding door 14 is installed on the tank body of the vacuum carburizing treatment tank 1 at the side of the workpiece discharge port 13; a gaseous carburizing source input port 15 is formed at the tip of the bottom conical section of the vacuum carburizing treatment tank 1, and the gaseous carburizing source 5 is communicated with the gaseous carburizing source input port 15 through a first valve 16; the non-gaseous carburizing source conveyor 7 is arranged on the cylindrical section tank body of the vacuum carburizing treatment tank 1, the non-gaseous carburizing source 6 is communicated with the non-gaseous carburizing source conveyor 7 through a second valve 17, and the discharge end of the non-gaseous carburizing source conveyor 7 is positioned right above the first workpiece transfer roller way 2; a recharge gas inlet 18 is formed in the tip end of the top conical section of the vacuum carburization treatment tank 1, and the recharge gas source 8 is communicated with the recharge gas inlet 18 through a third valve 19; an oxygen probe 20 is arranged on the cylindrical section of the vacuum carburization treatment tank 1, and the oxygen probe 20 is externally connected with a carbon potential controller 21; and a dispersion fan 22 is arranged at the top of the cylindrical section of the vacuum carburization treatment tank 1.

The atmosphere protection transfer channel unit comprises an atmosphere protection cover 23, a second workpiece transfer roller way 24, a first sealing door 25, a second sealing door 26 and an atmosphere protection gas source 27; the atmosphere protection cover 23 is of a closed pipeline structure, the atmosphere protection cover 23 is horizontally arranged, and one end of the atmosphere protection cover 23 is hermetically connected with the workpiece discharge hole 13 of the vacuum carburization treatment tank 1; the second workpiece transfer roller way 24 is horizontally arranged on the upper surface of the bottom plate of the atmosphere protection cover 23, and the feeding end of the second workpiece transfer roller way 24 is connected with the discharging end of the first workpiece transfer roller way 2; the first sealing door 25 is arranged at the pipe orifice of the feeding end of the atmosphere protection cover 23, and the second sealing door 26 is arranged at the pipe orifice of the discharging end of the atmosphere protection cover 23; an atmosphere protection gas input port 28 is formed in the top plate of the atmosphere protection cover 23, and the atmosphere protection gas source 27 is communicated with the atmosphere protection gas input port 28 through a fourth valve 29; the atmosphere protection cover 23 is of a multilayer composite structure, the inner layer of the atmosphere protection cover 23 is a fireproof material layer, the middle layer of the atmosphere protection cover 23 is a heat insulation material layer, and the outer layer of the atmosphere protection cover 23 is a rigid framework layer.

The pressure quenching treatment unit comprises a pressure quenching treatment tank 30, a pressure quenching machine 31, a gaseous coolant storage tank 32, a liquid coolant storage tank 33, an exhaust pump 34 and a third workpiece transfer roller way 35; the pressure quenching treatment tank 30 is of a square structure, a hydraulic base 36 is mounted on a bottom plate of the pressure quenching treatment tank 30, the pressure quenching machine 31 is mounted on the upper surface of the hydraulic base 36, a workpiece feeding hole 37 is formed in the pressure quenching treatment tank 30 in front of the pressure quenching machine 31, and a material taking door 38 is formed in the pressure quenching treatment tank 30 behind the pressure quenching machine 31; the third workpiece transfer roller way 35 is arranged between the pressure quenching machine 31 and the workpiece feed port 37, the feed end of the third workpiece transfer roller way 35 is connected with the discharge end of the second workpiece transfer roller way 24, and the discharge end of the third workpiece transfer roller way 35 is connected with the pressure quenching machine 31; a gaseous coolant input port 39 and a liquid coolant input port 40 are respectively arranged at the top of the pressure quenching machine 31, and a gaseous coolant output port 41 and a liquid coolant output port 42 are respectively arranged at the bottom of the pressure quenching machine 31; the gaseous coolant input port 39 is communicated with the gaseous coolant storage tank 32 through a fifth valve 43, the gaseous coolant output port 41 is communicated with the air inlet end of the exhaust pump 34, and the air outlet end of the exhaust pump 34 is communicated with the atmosphere; the liquid coolant inlet 40 is connected to the liquid outlet of the liquid coolant storage tank 33 through a sixth valve 44, and the liquid coolant outlet 42 is connected to the liquid return of the liquid coolant storage tank 33.

The gaseous carbon infiltration source 5 comprises coal gas, natural gas or propane gas; the non-gaseous carbon sequestration source 6 comprises kerosene, acetone, or methanol; the recharge gas source 8 comprises compressed air or an inert gas; the atmosphere protection gas source 27 comprises argon or nitrogen; the gaseous coolant stored in the gaseous coolant storage tank 32 includes compressed air or inert gas; the liquid coolant stored in the liquid coolant storage tank 33 includes water or oil; the number of the gaseous carbon infiltration source 5, the non-gaseous carbon infiltration source 6, the aeration return source 8, the atmosphere protection gas source 27, the gaseous coolant storage tank 32 and the liquid coolant storage tank 33 is at least two.

A vacuum carburization and pressure quenching integrated processing method adopts the vacuum carburization and pressure quenching integrated processing device, and comprises the following steps:

the method comprises the following steps: opening the feeding door 14, feeding the workpiece 45 into the vacuum carburizing treatment tank 1, placing the workpiece 45 on the first workpiece transfer roller bed 2, and simultaneously enabling the workpiece 45 to be positioned right below the discharge end of the non-gaseous carbon infiltration source conveyor 7;

step two: closing the feeding door 14, starting the vacuum pump 4, and vacuumizing the interior of the vacuum carburizing treatment tank 1 until the vacuum degree barometer 10 shows that the interior of the vacuum carburizing treatment tank 1 meets the set vacuum degree requirement; simultaneously starting the carbon potential controller 21 until the carbon potential data measured by the oxygen probe 20 meets the requirement of a set value;

step three: starting the heater 11 to perform induction heating on the workpiece 45 until the real-time temperature measured by the temperature thermocouple 12 reaches the set carburizing temperature requirement;

step four: selecting a gaseous carbon infiltration source 5 or a liquid carbon infiltration source 6 according to the needs of carburization treatment; when the gaseous carburizing source 5 is selected, the first valve 16 is opened, the carburizing gas enters the vacuum carburizing treatment tank 1 through the first valve 16 and the gaseous carburizing source input port 15 in sequence, the dispersion fan 22 is started simultaneously, and the gas carburizing treatment of the workpiece 45 is completed according to the set strong carburizing time and diffusion carburizing time; when the liquid carburizing source 6 is selected, the second valve 17 is opened, the carburizing liquid is sprayed on the workpiece 45 through the second valve 17 and the non-gaseous carburizing source conveyor 7 in sequence, and the liquid carburizing treatment of the workpiece 45 is completed according to the set strong carburizing time and diffusion carburizing time;

step five: after the workpiece 45 finishes the carburization treatment, the third valve 19 is opened, and the recharge gas in the recharge gas source 8 sequentially passes through the third valve 19 and the recharge gas inlet 18 and enters the vacuum carburization treatment tank 1 until the air pressure in the vacuum carburization treatment tank 1 is restored to the standard atmospheric pressure;

step six: opening the fourth valve 29, and allowing the atmosphere protection gas in the atmosphere protection gas source 27 to sequentially enter the atmosphere protection cover 23 through the fourth valve 29 and the atmosphere protection gas input port 28;

step seven: according to the carburizing quality requirement of the workpiece 45, the workpiece 45 is subjected to slow cooling treatment or pressure quenching treatment directly; when the slow cooling treatment is selected to be carried out on the workpiece 45, the first sealing door 25 is firstly opened, the workpiece 45 is transferred to the second workpiece transfer roller way 24 by the first workpiece transfer roller way 2, the workpiece 45 is completely transferred into the atmosphere protection cover 23 by the second workpiece transfer roller way 24, then the first sealing door 25 is closed, the workpiece 45 is slowly cooled in the atmosphere protection cover 23 until the workpiece 45 is slowly cooled to the set temperature, the first sealing door 25 is opened again, the slowly cooled workpiece 45 is moved back to the vacuum carburizing treatment tank 1 again, then the first sealing door 25 is closed again, the heater 11 is started simultaneously, the workpiece 45 is inductively heated until the workpiece 45 is reheated to the set temperature and is kept warm for the set time, then the first sealing door 25 and the second sealing door 26 are opened simultaneously, the workpiece 45 which is heated and kept warm is moved to the third workpiece transfer roller way 35 through the first workpiece transfer roller way 2 and the second workpiece transfer roller way 24 in sequence, and finally enters a pressure quenching treatment tank 30; when the workpiece 45 is selected to be directly subjected to pressure quenching treatment, the first sealing door 25 and the second sealing door 26 are opened simultaneously, and the workpiece 45 after carburization treatment is moved to the third workpiece transfer roller way 35 through the first workpiece transfer roller way 2 and the second workpiece transfer roller way 24 in sequence and finally enters the pressure quenching treatment tank 30;

step eight: after the workpiece 45 is transferred onto the third workpiece transfer roller way 35, the first sealing door 25 and the second sealing door 26 are closed, then the third workpiece transfer roller way 35 directly sends the workpiece 45 into the pressure quenching machine 31, and the pressure quenching machine 31 finishes clamping and fixing the workpiece;

step nine: after the workpiece 45 is clamped and fixed in the pressure quenching machine 31, selecting a gaseous coolant or a liquid coolant according to the pressure quenching treatment requirement; when the gaseous coolant is selected, the fifth valve 43 is opened, the gaseous coolant in the gaseous coolant storage tank 32 sequentially enters the pressure quenching machine 31 through the fifth valve 43 and the gaseous coolant inlet 39, the workpiece 45 in the pressure quenching machine 31 is quenched through the gaseous coolant, the quenched gaseous coolant is discharged from the gaseous coolant outlet 41, and finally the gaseous coolant is discharged into the atmosphere through the exhaust pump 34; when the liquid coolant is selected, the sixth valve 44 is opened, the liquid coolant in the liquid coolant storage tank 33 sequentially enters the pressure quenching machine 31 through the sixth valve 44 and the liquid coolant inlet 40, the workpiece 45 in the pressure quenching machine 31 is quenched through the liquid coolant, and the quenched liquid coolant directly returns to the liquid coolant storage tank 33 through the liquid coolant outlet 42, so that the circulation of the liquid coolant is completed;

step ten: after the pressure quenching treatment of the workpiece 45 in the pressure quenching machine 31 is completed, firstly, the clamping and fixing of the pressure quenching machine 31 on the workpiece 45 are released, then the material taking door 38 is opened, the workpiece 45 in the pressure quenching machine 31 is moved out of the pressure quenching treatment tank 30, and at this time, the vacuum carburization and pressure quenching integrated treatment of the workpiece 45 is completed.