阅读说明：本技术 一种高精度立式磨床的流体控制系统 (Fluid control system of high-precision vertical grinding machine ) 是由 王锐 刘伟 任慧玲 宋学敏 于 2020-11-24 设计创作，主要内容包括：本发明公开了一种高精度立式磨床的流体控制系统,包括：润滑系统、冷却系统和气动系统；润滑系统包括机床集中润滑系统和主轴油气润滑系统,其中,机床集中润滑系统中包括分配器和计量件；主轴油气润滑系统包括油气混合阀；冷却系统包括循环冷却系统和喷淋冷却系统,其中,循环冷却系统包括水冷机和冷却回路,冷却回路的输入输出均与水冷机相连；喷淋冷却系统包括一级水箱、二级水箱、磁性分离器和浸入式冷却机；气动系统包括压力控制平衡气路。本发明采用清洁空气增压的方法替代了传统技术中的液压系统,解决了液压系统所存在的对温度较为敏感的问题,在应用的过程中毋须考虑工作环境的温度,应用更加方便,不仅环保而且能够有效节约成本。(The invention discloses a fluid control system of a high-precision vertical grinding machine, which comprises: a lubrication system, a cooling system, and a pneumatic system; the lubricating system comprises a machine tool centralized lubricating system and a main shaft oil-gas lubricating system, wherein the machine tool centralized lubricating system comprises a distributor and a metering part; the main shaft oil-gas lubricating system comprises an oil-gas mixing valve; the cooling system comprises a circulating cooling system and a spraying cooling system, wherein the circulating cooling system comprises a water-cooled machine and a cooling loop, and the input and the output of the cooling loop are connected with the water-cooled machine; the spray cooling system comprises a primary water tank, a secondary water tank, a magnetic separator and an immersion type cooler; the pneumatic system comprises a pressure control balancing air passage. The invention adopts the method of clean air pressurization to replace a hydraulic system in the traditional technology, solves the problem that the hydraulic system is sensitive to temperature, does not need to consider the temperature of the working environment in the application process, is more convenient to apply, is environment-friendly and can effectively save the cost.)

1. A fluid control system of a high-precision vertical grinding machine is applied to the grinding machine, a workpiece spindle is fixedly arranged on one side of a machine body, a grinding wheel dressing unit is fixedly arranged on the other side of the machine body, and a movable tailstock is arranged between the workpiece spindle and the grinding wheel dressing unit; the grinding shaft passes through drive arrangement at X, Y and the three direction motion of Z axle, and wherein the X axle passes through linear electric motor drive, and Y axle and Z axle are respectively through servo motor and ball drive, and double-cylinder balancing unit is installed additional to the Z axle, and the work piece passes through the chuck and the tailstock centre gripping of main shaft front end and fixes, configuration fluid control system includes on the grinding machine: a lubrication system, a cooling system, and a pneumatic system;

the lubricating system comprises a machine tool centralized lubricating system and a main shaft oil-gas lubricating system, wherein the machine tool centralized lubricating system comprises a distributor and a metering piece, the distributor is respectively connected with the lubricating oil tank and the metering piece, and the metering piece is respectively connected with the guide rail sliding block and the lead screw; the spindle oil-gas lubricating system comprises an oil-gas mixing valve, the oil-gas mixing valve is connected with the lubricating oil tank through an oil supply path and is connected with a compressed air source through an air supply path, and the oil-gas mixing valve is connected with the grinding spindle through an oil-gas mixing path;

the cooling system comprises a circulating cooling system and a spraying cooling system, wherein the circulating cooling system comprises a water-cooled machine and a cooling loop, and the input and the output of the cooling loop are connected with the water-cooled machine; the spray cooling system comprises a primary water tank, a secondary water tank, a magnetic separator and an immersion cooler, wherein the primary water tank collects cutting fluid of a grinding machine, the secondary water tank is communicated with the primary water tank through the magnetic separator, the immersion cooler is communicated with the secondary water tank, and the grinding machine is connected with the secondary water tank;

the pneumatic system comprises a pressure control balance gas circuit, and the pressure control balance gas circuit is respectively connected with the compressed air source and the grinding machine.

2. The fluid control system of a high precision vertical grinding machine according to claim 1, further comprising an electric gear lubrication pump, wherein the distributors include an X-axis lubrication distributor, a Y-axis lubrication distributor, a Z-axis lubrication distributor and a tailstock lubrication distributor; the metering parts comprise guide rail sliding block lubrication metering parts, first lead screw lubrication metering parts, second lead screw lubrication metering parts and guide rail sliding block lubrication metering parts;

the electronic gear lubricating pump with the lubricated oil tank links to each other, X axle lubrication distributor Y axle lubrication distributor Z axle lubrication distributor with tailstock lubrication distributor divide equally respectively with the lubricated oil tank links to each other, the lubricated metering part of guide rail slider first lead screw lubrication metering part, second lead screw lubrication metering part with the lubricated metering part of guide rail slider corresponds respectively with X axle lubrication distributor Y axle lubrication distributor Z axle lubrication distributor with tailstock lubrication distributor links to each other, X axle lubrication distributor Y axle lubrication distributor Z axle lubrication distributor with tailstock lubrication distributor still all with X axle Y axle Z axle with each lead screw or guide rail slider on the tailstock are linked together.

3. The fluid control system of a high-precision vertical grinding machine according to claim 1, wherein the pressure of compressed air delivered by the air supply path is 5bar, the oil-gas mixing path comprises two paths, and the pressure of the oil-gas mixture delivered by the two paths is 1 bar.

4. The fluid control system of a high-precision vertical grinding machine according to claim 1, wherein the cooling circuits in the circulating cooling system include a workpiece spindle cooling circuit, a grinding shaft cooling circuit, and a linear motor cooling circuit;

the workpiece spindle cooling loop sequentially comprises an input port, a throttle valve, a workpiece spindle, a digital display type flow sensor and an output port;

the grinding shaft cooling loop sequentially comprises an input port, a throttle valve, a grinding shaft, a digital display type flow sensor and an output port;

the linear motor cooling loop sequentially comprises an input port, a throttle valve, a linear motor, a digital display type flow sensor and an output port;

and all the input ports and the output ports are connected with the water cooling machine.

5. The fluid control system of a high-precision vertical grinding machine according to claim 1, characterized in that the spray cooling system further comprises a first delivery pump, a second delivery pump, a centrifugal filter, a high-pressure high-flow water pump; the secondary water tank comprises a first water tank and a second water tank, and the liquids in the first water tank and the second water tank are not interfered with each other;

the first conveying pump is respectively connected with the primary water tank and the magnetic separator, the input of the magnetic separator is connected with the first conveying pump, the output of the magnetic separator is communicated with the first water tank, the input of the second conveying pump is communicated with the first water tank, the output of the second conveying pump is connected with the input of the centrifugal filter, the output of the centrifugal filter is communicated with the second water tank, the immersion type cooler is connected with the second water tank, and a temperature sensor is arranged on the immersion type cooler;

and the high-pressure high-flow water pump is respectively connected with the second water tank and a structure needing cooling on the grinding machine.

6. The fluid control system of a high-precision vertical grinding machine according to claim 5, wherein the structures to be cooled on the grinding machine include a machine body, a grinding shaft, and a wheel dresser; and on-off electromagnetic valves and manual ball valves are arranged among the lathe bed, the grinding shaft, the grinding wheel dresser and the high-pressure large-flow water pump.

7. The fluid control system of a high-precision vertical grinding machine according to claim 1, wherein the centrifugal filter has a filtering capacity of 120L/min and a filtering precision of 1 μm.

8. The fluid control system of a high-precision vertical grinding machine according to claim 1, wherein the pressure control balancing gas circuit comprises: the device comprises a Z-axis balance gas circuit, a tailstock control gas circuit, a chuck control gas circuit, a gas seal control gas circuit and a grating blowing control gas circuit;

the Z-axis balancing gas circuit sequentially comprises a Z-axis input port, a booster valve, a gas storage tank and a Z-axis output port, and the Z-axis output port is connected with the double-cylinder balancing device;

the tailstock control gas path sequentially comprises a tailstock input end, a tailstock control valve group and a tailstock output end, and the tailstock output end is connected with the tailstock;

the chuck control gas path sequentially comprises a chuck input end, a pressure increasing valve, a reversing valve, a digital display type pressure switch and a chuck output end, and the chuck output end is connected with the chuck;

the air seal control air path sequentially comprises an air seal input end, an on-off valve set, a pressure reducing valve set and an air seal output end, and the air seal output end is connected with an air seal device;

the grating blowing control air path sequentially comprises a grating input end, a precision filter unit and a grating output end, and the grating output end is connected with the grating blowing device.

9. The fluid control system of a high precision vertical grinder of claim 8, wherein the tailstock control valve set comprises a spindle oil-air lubrication gas supply valve and a digital display pressure switch on the tailstock control gas circuit in sequence.

10. The fluid control system of a high-precision vertical grinding machine according to claim 8, wherein the fine filter unit has a filtration precision of 0.01 μm.

Technical Field

The invention relates to the technical field of machine tool fluid control, in particular to a fluid control system of a high-precision vertical grinding machine.

Background

Fluid control systems of machine tools can be broadly divided into hydraulic systems, pneumatic systems, lubrication systems, and cooling systems. The machine tool fluid control system not only can provide a power source, but also can assist the machine tool to complete various machining functions, particularly, the system provides necessary conditions for the rapid development of modern machine tools, and is one of important means for realizing high speed, high precision, high efficiency and high reliability of the machine tools.

The existing high-precision grinding machine fluid control system is simple in structure, but various high requirements are put on the use conditions of a machine tool, wherein a constant-temperature workshop with the temperature requirement of 20 +/-2 degrees is indispensable. Such high use conditions, however, present certain difficulties for the user.

Therefore, it is an urgent problem to be solved by those skilled in the art to provide a fluid control system for a high-precision vertical grinder with low use conditions.

Disclosure of Invention

In view of this, the invention provides a fluid control system of a high-precision vertical grinding machine, and aims to solve the problem that the requirement on the temperature of a working environment is high in the application process of the fluid control system of the grinding machine in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a fluid control system of a high-precision vertical grinding machine is applied to the grinding machine, a workpiece spindle is fixedly arranged on one side of a machine body, a grinding wheel dressing unit is fixedly arranged on the other side of the machine body, and a movable tailstock is arranged between the workpiece spindle and the grinding wheel dressing unit; the grinding shaft passes through drive arrangement at X, Y and the three direction motion of Z axle, and wherein the X axle passes through linear electric motor drive, and Y axle and Z axle are respectively through servo motor and ball drive, and double-cylinder balancing unit is installed additional to the Z axle, and the work piece passes through the chuck and the tailstock centre gripping of main shaft front end and fixes, configuration fluid control system includes on the grinding machine: a lubrication system, a cooling system, and a pneumatic system;

the lubricating system comprises a machine tool centralized lubricating system and a main shaft oil-gas lubricating system, wherein the machine tool centralized lubricating system comprises a distributor and a metering piece, the distributor is respectively connected with the lubricating oil tank and the metering piece, and the metering piece is respectively connected with the guide rail sliding block and the lead screw; the spindle oil-gas lubricating system comprises an oil-gas mixing valve, the oil-gas mixing valve is connected with the lubricating oil tank through an oil supply path and is connected with a compressed air source through an air supply path, and the oil-gas mixing valve is connected with the grinding spindle through an oil-gas mixing path;

the cooling system comprises a circulating cooling system and a spraying cooling system, wherein the circulating cooling system comprises a water-cooled machine and a cooling loop, and the input and the output of the cooling loop are connected with the water-cooled machine; the spray cooling system comprises a primary water tank, a secondary water tank, a magnetic separator and an immersion cooler, wherein the primary water tank collects cutting fluid of a grinding machine, the secondary water tank is communicated with the primary water tank through the magnetic separator, the immersion cooler is communicated with the secondary water tank, and the grinding machine is connected with the secondary water tank;

the pneumatic system comprises a pressure control balance gas circuit, and the pressure control balance gas circuit is respectively connected with the compressed air source and the grinding machine.

The beneficial effects produced by adopting the technical scheme are as follows:

the invention discloses and provides a fluid control system of a high-precision vertical grinding machine, which comprises a lubricating system, a cooling system and a pneumatic system, firstly, the invention adopts a clean air pressurization method to replace a hydraulic system in the traditional technology, solves the problem that the hydraulic system is sensitive to temperature, does not need to consider the temperature of a working environment in the application process, and is more convenient to apply; secondly, a main shaft oil-gas lubricating system in the fluid control system mixes lubricating oil and compressed air through an oil-gas mixing valve, oil flow is sent to a lubricating point along the pipe wall in a fine granular shape by utilizing the airflow action of the compressed air, a fine and continuous oil film is formed at the lubricating part, and a stronger lubricating effect can be provided for a grinding shaft bearing which runs at a high speed; the cooling system can cool the parts on the grinding machine, and the working performance of the grinding machine is effectively improved.

Preferably, the lubricating device further comprises an electric gear lubricating pump, wherein the distributor comprises an X-axis lubricating distributor, a Y-axis lubricating distributor, a Z-axis lubricating distributor and a tailstock lubricating distributor; the metering parts comprise guide rail sliding block lubrication metering parts, first lead screw lubrication metering parts, second lead screw lubrication metering parts and guide rail sliding block lubrication metering parts;

the electronic gear lubricating pump with the lubricated oil tank links to each other, X axle lubrication distributor Y axle lubrication distributor Z axle lubrication distributor with tailstock lubrication distributor divide equally respectively with the lubricated oil tank links to each other, the lubricated metering part of guide rail slider first lead screw lubrication metering part, second lead screw lubrication metering part with the lubricated metering part of guide rail slider corresponds respectively with X axle lubrication distributor Y axle lubrication distributor Z axle lubrication distributor with tailstock lubrication distributor links to each other, X axle lubrication distributor Y axle lubrication distributor Z axle lubrication distributor with tailstock lubrication distributor still all with X axle Y axle Z axle with each lead screw or guide rail slider on the tailstock are linked together.

It needs to be further explained that:

the centralized lubricating system is used for lubricating an X-axis/Y-axis/Z-axis linear rolling guide rail, a tailstock guide rail and Y-axis and Z-axis ball screw pairs so as to ensure that the centralized lubricating system works with high precision. The centralized lubrication adopts a quantitative pressurized thin oil lubrication system. The system consists of a pressure relief type electric gear lubricating pump, a pressure type thin oil quantitative metering part and related pipe fittings. A pressure switch is arranged in the system, so that the cut-off, the pressure loss, the leakage and the like of the lubricating system can be monitored. The running time and the intermittent time of the lubricating pump are directly set by a machine tool PLC, and compared with a lubricating unit with a controller, the lubricating pump saves nearly half of cost.

Preferably, the pressure of the compressed air conveyed by the air supply path is 5bar, the oil-gas mixing path comprises two paths, and the pressure of the oil-gas mixture conveyed by the two paths of the oil-gas mixing path is 1 bar.

It needs to be further explained that:

the main shaft oil-gas lubrication system is used for lubricating a grinding shaft bearing running at a high speed. The oil-gas lubrication is that a lubricating oil agent and compressed air (pressure 5bar) are mixed through an oil-gas mixing valve, and oil flow (pressure 1bar) is sent to a lubricating point along the pipe wall in a fine granular shape by using the airflow action of the compressed air, so that a fine and continuous oil film is formed at the lubricating position.

Preferably, the cooling circuits in the circulating cooling system comprise a workpiece spindle cooling circuit, a grinding shaft cooling circuit and a linear motor cooling circuit;

the workpiece spindle cooling loop sequentially comprises an input port, a throttle valve, a workpiece spindle, a digital display type flow sensor and an output port;

the grinding shaft cooling loop sequentially comprises an input port, a throttle valve, a grinding shaft, a digital display type flow sensor and an output port;

the linear motor cooling loop sequentially comprises an input port, a throttle valve, a linear motor, a digital display type flow sensor and an output port;

and all the input ports and the output ports are connected with the water cooling machine.

It needs to be further explained that:

the circulating cooling system is used for circularly cooling the workpiece spindle (comprising a motor and a bearing), the grinding shaft (comprising a motor and a bearing) and the X-axis linear motor so as to ensure the high-performance work of the workpiece spindle. The circulating cooling loop comprises a water cooler, a water distribution valve block, a digital display type flow sensor, a throttle valve and pipe fittings. The cooling medium is purified water or distilled water, and a certain proportion of antirust liquid is added. The cooling water of each branch of the circulating cooling can realize flow regulation and flow monitoring.

Preferably, the spray cooling system further comprises a first delivery pump, a second delivery pump, a centrifugal filter and a high-pressure high-flow water pump; the secondary water tank comprises a first water tank and a second water tank, and the liquids in the first water tank and the second water tank are not interfered with each other;

the first conveying pump is respectively connected with the primary water tank and the magnetic separator, the input of the magnetic separator is connected with the first conveying pump, the output of the magnetic separator is communicated with the first water tank, the input of the second conveying pump is communicated with the first water tank, the output of the second conveying pump is connected with the input of the centrifugal filter, the output of the centrifugal filter is communicated with the second water tank, the immersion type cooler is connected with the second water tank, and a temperature sensor is arranged on the immersion type cooler;

and the high-pressure high-flow water pump is respectively connected with the second water tank and a structure needing cooling on the grinding machine.

It needs to be further explained that:

the spraying cooling system is used for cooling a lathe body, a grinding wheel and a workpiece of the machine tool, and aims to ensure the constant temperature environment of a working area of the machine tool and prevent the workpiece and the grinding wheel from being burnt. The spraying cooling system comprises links of conveying, filtering, cooling, controlling and the like of cooling liquid.

The primary water tank is used for conveying the cutting fluid of the mixed abrasive dust collected by the lathe bed to the secondary water tank. The first water tank in the secondary water tank is provided with a magnetic separator which is used for removing magnetic abrasive dust in the cutting fluid and accommodating the cutting fluid after the abrasive dust is removed through the first water tank. The second conveying pump is used for conveying the cutting fluid filtered by the magnetic separator from the first water tank to the centrifugal filter and accommodating the filtered fluid through the second water tank; the centrifugal filter may be a precision centrifugal filter (filtering capacity 120L/min, filtering accuracy 1 μm) for removing residual magnetic and non-magnetic abrasive dust, which may be replaced by a tape filter or a backwashing filter for cost or floor area reasons. The water tank configuration immersion cutting fluid cooler (rated refrigerating capacity 20kW), the effect is cooled off clean cutting fluid, the probe form can be selected for use to the temperature sensor of cooler, establishes cutting fluid temperature measurement point on the lathe bed, can maintain the lathe workspace thermal field invariant better like this. And a high-pressure large-flow water pump is arranged at the tail end of the secondary water tank, and clean cooled cutting fluid is conveyed to the lathe bed, the grinding shaft and the grinding wheel dresser. Each spraying cooling pipeline of the machine tool is controlled by an on-off electromagnetic valve and a manual ball valve.

Preferably, the structure needing cooling on the grinding machine comprises a machine body, a grinding shaft and a grinding wheel dresser; and on-off electromagnetic valves and manual ball valves are arranged among the lathe bed, the grinding shaft, the grinding wheel dresser and the high-pressure large-flow water pump.

Preferably, the centrifugal filter has the filtering capacity of 120 liters/minute and the filtering precision of 1 micron.

Preferably, the pressure control balancing gas circuit includes: the device comprises a Z-axis balance gas circuit, a tailstock control gas circuit, a chuck control gas circuit, a gas seal control gas circuit and a grating blowing control gas circuit;

the Z-axis balancing gas circuit sequentially comprises a Z-axis input port, a booster valve, a gas storage tank and a Z-axis output port, and the Z-axis output port is connected with the double-cylinder balancing device;

the tailstock control gas path sequentially comprises a tailstock input end, a tailstock control valve group and a tailstock output end, and the tailstock output end is connected with the tailstock;

the chuck control gas path sequentially comprises a chuck input end, a pressure increasing valve, a reversing valve, a digital display type pressure switch and a chuck output end, and the chuck output end is connected with the chuck;

the air seal control air path sequentially comprises an air seal input end, an on-off valve set, a pressure reducing valve set and an air seal output end, and the air seal output end is connected with an air seal device;

the grating blowing control air path sequentially comprises a grating input end, a precision filter unit and a grating output end, and the grating output end is connected with the grating blowing device.

Preferably, the tailstock control valve group sequentially comprises a main shaft oil-gas lubrication air supply valve and a digital display pressure switch on the tailstock control air path.

Preferably, the precision filter unit has a filtration precision of 0.01 microns.

It needs to be further explained that:

clamping and loosening a workpiece chuck, moving a tailstock, locking the tailstock, cleaning and blowing an X/Y/Z axis grating, hermetically sealing a workpiece main shaft, hermetically sealing a grinding shaft, repairing the shaft by using a grinding wheel, hermetically sealing the grinding shaft, providing an oil-gas lubricating gas source for the main shaft and balancing the Z axis to move up and down.

The most front end of the pneumatic system is provided with a freezing type air dryer with a front filter and a rear filter. The air source processing element comprises an electric control on-off valve, a filtering pressure reducing valve, an air source pressure switch and an oil mist separator. The workpiece chuck gas circuit is provided with a pressure increasing valve so as to provide enough clamping force for the chuck, and is also provided with a digital display type pressure switch so as to closely monitor the clamping force of the chuck. The grating cleaning and blowing air path is provided with a precision filter unit with the filtering precision of 0.01 micron, so that the normal work of the grating is ensured. And the shaft gas sealing pipelines are provided with pressure regulating valve groups to adapt to different pressure requirements of the shafts. The spindle oil-gas lubrication gas supply path is provided with a digital display pressure switch, so that the normal work of the spindle oil-gas lubrication is ensured. The Z-axis balance gas circuit is provided with a booster valve, a gas storage tank and a double balance cylinder, and the Z-axis balance gas circuit has the function of reducing the load of a Z-axis servo motor and enables Z-direction (up-down) motion to be stable and reliable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a centralized lubrication system of a vertical grinding machine;

FIG. 2 is a schematic diagram of an oil-gas lubrication system of a spindle of the vertical grinding machine;

FIG. 3 is a schematic diagram of a circulating cooling system of the vertical grinding machine;

FIG. 4 is a schematic diagram of a spray cooling system of the vertical grinding machine;

fig. 5 is a schematic diagram of a pneumatic system of the vertical grinding machine.

Wherein the reference symbols are:

in fig. 1, 1-lubricating oil tank; 2-X axis lubrication distributor; 3-lubricating the metering piece by the guide rail slide block; 4-Y axis lubrication distributor; 5-lubricating the metering part by the first lead screw; a 6-Z axis lubrication dispenser; 7-lubricating the metering piece by the second lead screw; 8-tailstock lubrication distributor; 9-guide rail slide block lubricating and metering piece;

in fig. 2, 1-lubricating oil tank; 2-oil supply path; 3-an oil-gas mixing valve; 4-gas supply path; 5-oil-gas mixing circuit; 6-grinding the shaft;

in FIG. 3, 1-water cooler; 2-a throttle valve; 3, cooling the workpiece spindle; 4, cooling the grinding shaft; 5, cooling the linear motor; 6-cooling out the linear motor; 7-cooling out the grinding shaft; 8-a flow sensor; 9-cooling the workpiece spindle;

in FIG. 4, 1-bed; 2-chip removal port; 3-first-level water tank; 4-first level water tank level meter; 5-a first delivery pump; 6-a first water tank; 7-a secondary water tank level meter I; 8-a magnetic separator; 9-a second delivery pump; 10-filtering by a centrifuge; 11-an immersion cooler; 12-a liquid supply pump; 13-secondary water tank level gauge II; 14-a probe-type temperature sensor; 15-switching on and off the electromagnetic valve; 16-spraying and cooling a grinding wheel dresser; 17-flushing and cooling the lathe bed; 18-grinding shaft spray cooling; 19-a second water tank;

in FIG. 5, 1-air dryer; 2-a gas source treatment element; 3-Z axis balance gas circuit; 4-tailstock control gas circuit; 5, controlling a gas circuit by a chuck; 6-air sealing to control the gas circuit; 7-grating blowing control gas circuit; 8-a precision filter unit; 9-on-off valve group; 10-a pressure reducing valve bank; 11-chuck gas circuit pressure switch; 12-oil gas lubrication gas circuit pressure switch; 13-tailstock control valve group; 14-chuck gas circuit directional control valve; 15-double balance cylinder; 16-an air storage tank; 17-chuck gas circuit pressure increasing valve; 18-balance gas circuit pressure increasing valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.

As shown in fig. 1 to 5, the present embodiment discloses a fluid control system of a high-precision vertical grinding machine. The control system comprises a lubricating system, a cooling system and a pneumatic system. The system adopts a clean air pressurization method to replace a hydraulic system, so that the system is environment-friendly and saves the cost.

The lubricating system is divided into a machine tool centralized lubricating system and a main shaft oil-gas lubricating system. As shown in fig. 1, an electric gear lubricating pump periodically sends thin oil in a lubricating oil tank 1 to an X-axis lubricating distributor 2, a Y-axis lubricating distributor 4, a Z-axis lubricating distributor 6 and a tailstock lubricating distributor 8, respectively, and the lubricating oil passes through metering elements such as a guide rail slider lubricating metering element 3, a first lead screw lubricating metering element 5, a second lead screw lubricating metering element 7 and a guide rail slider lubricating metering element 9 and is quantitatively sent to each guide rail slider and each lead screw. The principle diagram of the spindle oil-gas lubrication system is shown in fig. 2, an oil supply path 2 and an air supply path 4 respectively convey thin oil and compressed air (pressure 5bar) to an oil-gas mixing valve 3, and lubricating oil-gas (pressure 1bar) is conveyed to a bearing of a grinding shaft 6 through two oil-gas mixing paths 5.

The schematic diagram of the circulating cooling system is shown in fig. 3, and constant-temperature cooling water is conveyed to three cooling loops, namely a workpiece spindle cooling inlet 3, a workpiece spindle cooling outlet 9, a grinding shaft cooling inlet 4, a grinding shaft cooling outlet 7, a linear motor cooling inlet 5 and a linear motor cooling outlet 6, by a water cooling machine 1. Each loop is provided with a throttle valve 2 and a digital display type flow sensor 8, and the cooling water flow of each loop is monitored timely.

A schematic and diagrammatic view of the spray cooling system is shown in fig. 4. The cutting fluid of the mixed abrasive dust is collected by the lathe bed 1, flows into the first-stage water tank 3 through the chip falling port 2, and is conveyed into the magnetic separator 8 on the second-stage water tank by the first conveying pump 5 on the first-stage water tank 3, and the magnetic separator 8 removes the magnetic abrasive dust in the cutting fluid.

The secondary water tank comprises a first water tank 6 and a second water tank 19, the liquids in the first water tank 6 and the second water tank 19 are not interfered with each other, the cutting fluid filtered by the magnetic separator 8 is arranged in the first water tank 6, the first water tank 6 is provided with a second delivery pump 9 for delivering the cutting fluid filtered by the magnetic separator 8 to the centrifugal filter 10, and the centrifugal filter 10 (the filtering capacity is 120L/min, the filtering precision is 1 micron) removes the residual magnetic abrasive dust and non-magnetic abrasive dust and discharges the residual magnetic abrasive dust into the second water tank 19; clean cutting fluid is cooled by an immersion type cooling machine 11, a probe form 14 can be selected as a temperature sensor of the cooling machine (the rated refrigerating capacity is 20kW), and a temperature measuring point of the cutting fluid is conveniently arranged on a lathe bed. The high-pressure large-flow water pump 12 is arranged at the tail end of the second water tank 19, and clean cooled cutting fluid is conveyed to the lathe bed 17, the grinding shaft 18 and the grinding wheel dresser 16. Each spraying cooling pipeline of the machine tool is controlled by an on-off electromagnetic valve 15 and a manual ball valve. And a secondary water tank level meter I7 and a secondary water tank level meter II13 are respectively provided in the first water tank 6 and the second water tank 19 for monitoring the liquid level.

As shown in fig. 5, the pneumatic system schematic diagram is that the compressed air passes through the air dryer 1 and then the air source processing element 2, and is divided into a Z-axis balance air path 3, a tailstock control air path 4, a chuck control air path 5, an air seal control air path 6 and a grating blowing control air path 7. In which the grating blowing requires a high cleanliness of the compressed air, a fine filter unit 8 (filtering accuracy 0.01 μm) is installed. The air seal control air path is provided with an on-off valve group 9 and a pressure reducing valve group 10, so that the air seal of each shaft can be conveniently controlled and adjusted. The chuck control circuit is provided with a pressure increasing valve 17 to provide sufficient chuck clamping force, and a digital display type pressure switch 11 is provided after the reversing valve 14 to closely monitor the chuck clamping force. In the tailstock control valve group 13, a main shaft oil gas lubrication air supply valve is arranged, and a digital display type pressure switch 12 is arranged behind the valve to ensure that the air pressure is not lower than 5 bar. A pressure increasing valve 18 and an air storage tank 16 are arranged on the Z-axis balance air path, so that the double balance air cylinder 15 works normally, and the Z-direction (up-down) movement is stable and reliable.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.