阅读说明：本技术 一种细小长轴类的整体加热防变形淬火装置及工艺 (Integral heating deformation-preventing quenching device and process for small long shafts ) 是由 彭龙生 于 2020-11-20 设计创作，主要内容包括：一种细小长轴类的整体加热防变形淬火装置及工艺,所述装置包括：用于对细长轴进行连续加热的连续加热炉,所述连续加热炉上方设有用于对细长轴进行悬挂的悬臂架,所述悬臂架设有多个用于细长轴悬挂的吊具；所述悬臂架通过输送装置对细长轴进行自动输送；还包括呈正三角状设置的三个用于压紧细长轴的侧压轴,所述三个侧压轴表面分别接触连接有三个用于带动侧压轴转动的支撑辊,所述支撑辊呈正三角状设置在侧压轴外侧,且支承辊所呈三角状与侧压轴所呈三角状同心设置且三个角方向一致；所述侧压轴两两之间还设有喷嘴；其中一个支撑轴作为主动轴连接有用于提供转动动力的转动电机；所述的侧压轴连接有用于为其提供压力的液压装置。(An integral heating deformation-preventing quenching device and process for small long shafts, wherein the device comprises: the continuous heating furnace is used for continuously heating the slender shaft, a cantilever frame used for suspending the slender shaft is arranged above the continuous heating furnace, and the cantilever frame is provided with a plurality of lifting appliances used for suspending the slender shaft; the cantilever frame automatically conveys the slender shaft through a conveying device; the device is characterized by also comprising three side pressure shafts which are arranged in a regular triangle shape and used for pressing the slender shaft, wherein the surfaces of the three side pressure shafts are respectively in contact connection with three supporting rolls which are used for driving the side pressure shafts to rotate, the supporting rolls are arranged outside the side pressure shafts in a regular triangle shape, and the supporting rolls are concentrically arranged in a triangle shape with the side pressure shafts and have the same directions of three angles; nozzles are also arranged between every two side pressing shafts; one of the support shafts is used as a driving shaft and is connected with a rotating motor for providing rotating power; the side pressure shaft is connected with a hydraulic device for providing pressure for the side pressure shaft.)

1. The utility model provides a whole heating of tiny major axis class prevents shape guenching unit which characterized in that includes: the continuous heating furnace is used for continuously heating the slender shaft, a cantilever frame used for suspending the slender shaft is arranged above the continuous heating furnace, and the cantilever frame is provided with a plurality of lifting appliances used for suspending the slender shaft;

the device is characterized by also comprising three side pressure shafts which are arranged in a regular triangle shape and used for pressing the slender shaft, wherein the surfaces of the three side pressure shafts are respectively in contact connection with three supporting rolls which are used for driving the side pressure shafts to rotate, the supporting rolls are arranged outside the side pressure shafts in a regular triangle shape, and the supporting rolls are concentrically arranged in a triangle shape with the side pressure shafts and have the same directions of three angles; nozzles are also arranged between every two side pressing shafts; one of the support shafts is used as a driving shaft and is connected with a rotating motor for providing rotating power; the side pressure shaft is connected with a hydraulic device for providing pressure for the side pressure shaft.

2. The integral heating deformation-preventing quenching device for the fine long shafts as claimed in claim 1, wherein the hanger is a rotatable hanger.

3. The integral heating deformation-preventing quenching device for the fine long shafts as claimed in claim 1, wherein the nozzle is used for spraying a cooling medium to the fine long shafts, and the cooling medium can be liquid, mist or gas.

4. The integral heating deformation-preventing quenching device for the fine long shafts as claimed in claim 1, wherein the driving shaft is connected with a rotating motor through a driving belt.

5. The integral heating deformation-preventing quenching device for the fine long shafts as claimed in claim 1, wherein the length of the side pressing shaft is longer than that of the long shaft.

6. An integral heating deformation-preventing quenching process for fine long shafts comprises the following steps:

s1, firstly, the slender shaft is hung in a continuous heating furnace to be heated, and a workpiece is preheated, heated and preserved in the rotating process and then is discharged from the furnace;

s2, after discharging, the steel wire enters the central gaps of the three lateral pressure shafts in a centering manner, the steel wire quickly enters a quenching device, and under the state that a pressure measuring wheel is pressed, a rotating motor is started to drive the slender shaft to rotate for quenching and precooling;

s3, automatically adjusting the pressure of the side pressure shaft to about 30t through a hydraulic system after precooling, and spraying a cooling medium to rapidly cool the workpiece;

s4, taking out the workpiece and putting the workpiece into a low-temperature tempering furnace for tempering.

Technical Field

The invention relates to the technical field of slender shafts, in particular to an integral heating deformation-preventing quenching device and process for small slender shafts.

Background

Quenching is a common heat treatment method for roller shaft products to achieve the surface hardness of workpieces, is widely applied to roller shafts with surface hardness requirements such as metallurgical rollers and waist-shaped rollers, can not avoid deformation of slender shafts 1:30 in China by adopting any quenching process, and has deformation deviation of four to five millimeters or even more than ten millimeters. If the pressure correction is carried out, the finish machining cannot ensure that the machine is not deformed in the use process, and the use precision of the machine is directly influenced. Even if someone is straightening, the difficulty of subsequent processing is increased, the overall production efficiency is reduced, and meanwhile, the service life of the product is greatly reduced because the internal stress existing inside cannot be changed.

Disclosure of Invention

The invention aims to solve the technical problems and provides a quenching device and a quenching process with good quenching effect and deformation prevention effect.

The utility model provides a quenching device that preapress for an unfavorable turn of events of bulk heating of tiny major axis class, includes: the method comprises the following steps: the continuous heating furnace is used for continuously heating the slender shaft, a cantilever frame used for suspending the slender shaft is arranged above the continuous heating furnace, and the cantilever frame is provided with a plurality of lifting appliances used for suspending the slender shaft;

the device is characterized by also comprising three side pressure shafts which are arranged in a regular triangle shape and used for pressing the slender shaft, wherein the surfaces of the three side pressure shafts are respectively in contact connection with three supporting rolls which are used for driving the side pressure shafts to rotate, the supporting rolls are arranged outside the side pressure shafts in a regular triangle shape, and the supporting rolls are concentrically arranged in a triangle shape with the side pressure shafts and have the same directions of three angles; nozzles are also arranged between every two side pressing shafts; one of the support shafts is used as a driving shaft and is connected with a rotating motor for providing rotating power; the side pressure shaft is connected with a hydraulic device for providing pressure for the side pressure shaft.

In the integral heating deformation-preventing quenching device for the small long shafts, the lifting appliance is a rotatable lifting appliance.

In the integral heating deformation-preventing quenching device for the small long shafts, the nozzle is used for spraying cooling medium to the long shafts, and the cooling medium can be liquid, mist or gas.

In the integral heating deformation-preventing quenching device for the small long shafts, the driving shaft is connected with a rotating motor through a transmission belt.

In the integral heating deformation-preventing quenching device for the small long shafts, the length of the side pressure shaft is greater than that of the long shaft.

The invention also provides an integral heating anti-deformation quenching process for the small long shafts, which comprises the following steps:

s1, firstly, the slender shaft is hung in a continuous heating furnace to be heated, and a workpiece is preheated, heated and preserved in the rotating process and then is discharged from the furnace;

s2, after discharging, the steel wire enters the central gaps of the three lateral pressure shafts in a centering manner, the steel wire quickly enters a quenching device, and under the state that a pressure measuring wheel is pressed, a rotating motor is started to drive the slender shaft to rotate for quenching and precooling;

s3, automatically adjusting the pressure of the side pressure shaft to about 30t through a hydraulic system after precooling, and spraying a cooling medium to rapidly cool the workpiece;

s4, taking out the workpiece and putting the workpiece into a low-temperature tempering furnace for tempering.

Has the advantages that: compared with the deformation deviation of several millimeters to tens of millimeters in the existing quenching processing technology, the technical scheme can control the deformation deviation to be more than ten wires. The processing precision of the slender shaft is greatly improved, the surface hardening strength of the product is high, the crystal structure is stable, and the service life of the product is prolonged.

Drawings

FIG. 1 is a schematic view of continuous heating of a thin long shaft.

Fig. 2 is a schematic structural view of an integral heating deformation-preventing quenching device for fine long shafts.

Fig. 3 is a schematic structural diagram of fig. 2 from another view angle.

In the figure: the continuous heating furnace comprises a continuous heating furnace 1, a hanger 2, a cantilever frame 3, a slender shaft 4, a side pressing shaft 5, a supporting roller 6, a support 7, a rotating motor 8, a nozzle 9 and a transmission belt 10.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The integral heating deformation-preventing quenching device and process for the fine long shafts of the embodiment of the invention are further described with reference to the accompanying drawings.

The utility model provides a quenching device that preapress for an unfavorable turn of events of bulk heating of tiny major axis class, includes: the continuous heating furnace is characterized by comprising a continuous heating furnace 1 for continuously heating a slender shaft 4, wherein a cantilever frame 3 for suspending the slender shaft 4 is arranged above the continuous heating furnace 1, and further, a plurality of lifting appliances 2 for suspending the slender shaft 4 are arranged on the cantilever frame 3; the cantilever frame 3 automatically conveys the slender shaft 4 through a conveying device;

further, the hanger 2 is a rotatable hanger 2, for example, the hanger 2 can drive the slender shaft 4 to rotate uniformly and stably by a rotating motor, under the above scheme, the slender shaft 4 is firstly hung in the continuous heating furnace 1 for heating, and the workpiece is preheated, heated, insulated and then discharged from the furnace during rotation. The process ensures the uniformity of heating, the vertical hanging can not deform due to self weight, and the uniformity of the growth of the austenite nuclei is facilitated;

the device is characterized by further comprising three side pressing shafts 5 which are arranged in a regular triangle shape and used for pressing the slender shaft 4 tightly, wherein the surfaces of the three side pressing shafts 5 are respectively in contact connection with three supporting rollers 6 which are used for driving the side pressing shafts 5 to rotate, the supporting rollers 6 are arranged outside the side pressing shafts 5 in a regular triangle shape, the supporting rollers are concentrically arranged in the triangle shape with the side pressing shafts 5, and the directions of the three angles are consistent; a nozzle 9 is arranged between every two side pressure shafts 5 and used for spraying cooling medium to the slender shaft 4, and the cooling medium can be liquid, mist or gas;

one of the support shafts is connected with a rotating motor 8 used for providing rotating power as a driving shaft; the side pressure shaft 5 is connected with a hydraulic device for providing pressure for the side pressure shaft; after the slender shaft 4 is discharged from the furnace, the center of three side pressing shafts 5 is centered, and the three side pressing shafts quickly enter a quenching device, and the time can be controlled according to the size of the shafts. The homogenized austenite is fixed in the period of time and does not grow any longer, thereby really achieving the pre-cooling effect and naturally reducing the possibility of deformation.

After precooling, the pressure of the side pressure shaft 5 is automatically adjusted to about 30t through a hydraulic system, and cooling media in different states are sprayed according to different materials. In this process: there is a certain pressure to induce an extreme uniformity in the rate of austenite formation to martensite. Giving the martensite formation a "route" under relative pressure, in a limited space, hindering the formation of inhomogeneous martensite. And spraying a cooling medium, such as water, to quickly cool the workpiece block to the temperature, taking out the workpiece and putting the workpiece into a low-temperature tempering furnace, so as to achieve the purposes of stabilizing the structure and eliminating stress and simultaneously reduce deformation.

Furthermore, the driving shaft is connected with a rotating motor 8 through a transmission belt 10.

Further, the length of the side pressure shaft 5 is larger than that of the slender shaft 4.

An integral heating deformation-preventing quenching process for fine long shafts comprises the following steps:

s1, the slender shaft 4 is hung in the continuous heating furnace 1 to be heated, and the workpiece is preheated, heated, kept warm and then discharged from the furnace during rotation.

In the process, the rotary heating ensures the heating uniformity, the vertical hanging cannot deform due to self weight, and the uniformity of the growth of the austenite nuclei is facilitated.

And S2, after discharging, centering the furnace, entering the central gaps of the three side pressure shafts 5, rapidly entering a quenching device, and starting the rotating motor 8 to drive the slender shaft 4 to rotate for quenching and precooling in the state that the pressure measuring wheel is pressed.

In the process, the precooling time can be controlled according to the size of the shaft, and the homogenized austenite is fixed and does not grow any longer just in the time, so that a precooling effect is really achieved, and the possibility of deformation is naturally reduced.

And S3, automatically adjusting the pressure of the side pressure shaft 5 to about 30t through a hydraulic system after precooling, and spraying a cooling medium to rapidly cool the workpiece.

In the process, a certain pressure leads the austenite to form extremely uniform martensite, so that the martensite is formed in a 'route' under the relative pressure, and the formation of uneven martensite is prevented in a limited space.

S4, taking out the workpiece and putting the workpiece into a low-temperature tempering furnace for tempering, so that the aims of stabilizing the structure and eliminating the stress are achieved, and the deformation is reduced.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.