CN109968215B - Special control system for low-temperature micro-abrasive gas jet machining machine tool - Google Patents

Abstract

A special control system for a low-temperature micro-abrasive air jet machining machine tool comprises an input module (10), an output module (20) and a machine tool control module (30), wherein the machine tool control module (30) is respectively and electrically connected with the input module (10), the output module (20), an α shaft rotating module (40), an X-axis sliding module (50), a Y-axis sliding module (60), a Z-axis sliding module (70), a liquid nitrogen liquid level detection module (80), a machine tool state detection module (90) and a humidity detection module (100), the α shaft rotating module (40) is fixed with the X-axis sliding module (50), the Y-axis sliding module (60) and the Z-axis sliding module (70) to form a four-dimensional moving platform, and a working table (140) is fixed on the α shaft rotating module (40).

Description

A special control system for low temperature micro-abrasive air jet machining machine tool

technical field

The invention relates to a machine tool control technology, in particular to a control system for an abrasive gas jet machining machine tool, in particular to a special control system for a low temperature micro-abrasive gas jet machining machine tool.

Background technique

Abrasive air jet machining is a new type of micromachining technology developed on the basis of traditional sandblasting technology. Abrasive gas jet machining is especially suitable for local machining of high hardness metal materials and highly brittle non-metallic materials, such as local machining of narrow grooves and other structural shapes on materials such as silicon, germanium, glass, ceramics and quartz.

Due to its own limitations, ceramic materials are not suitable for some occasions. For example, the lack of optical transparency of ceramic materials and their limited biocompatibility limit their application in biomedicine. Based on this, people began to replace ceramic materials with high molecular polymer materials.

The high-molecular polymer material is processed by abrasive gas jet at room temperature. Since the high-molecular polymer material is mostly elastic and plastic, abrasive embedding will occur, resulting in extremely low processing efficiency. It has been found through research that when the high-molecular polymer material is processed by abrasive gas jet at low temperature, the abrasive embedding is significantly reduced compared with that at normal temperature, and the processing efficiency is greatly improved. Based on this, a low-temperature micro-abrasive gas jet machining machine was developed. Whether the control of the low temperature micro-abrasive air jet machining machine is reasonable or not determines the processing quality and processing efficiency of polymer materials.

SUMMARY OF THE INVENTION

The purpose of the present invention is to design a special control system for the low-temperature micro-abrasive gas jet processing machine tool according to the control requirements of the low-temperature micro-abrasive gas jet processing machine tool, and through the control system to reasonably control the low-temperature micro-abrasive gas jet processing machine tool, thereby improving the The machining quality and machining efficiency of the workpiece at low temperature.

The technical scheme of the present invention is:

A special control system for low-temperature micro-abrasive gas jet machining machine tools, characterized in that it includes a machine tool control module 30 composed of a rotation control unit 31, a linear movement control unit 33 and an auxiliary equipment control unit 32, and the machine tool control module 30 is connected with a Input module 10 and output module 20, the input module 10 is used for inputting numerical control codes, setting the humidity value of the processing chamber and setting the liquid nitrogen level value in the heat exchanger, the output module 20 It is used to display the running state of the numerical control code, the real-time humidity value of the processing chamber, and the real-time liquid nitrogen level value in the heat exchanger; Group 50, Y-axis sliding module 60, Z-axis sliding module 70; the auxiliary equipment control unit 32 is connected with a liquid nitrogen level detection module 80, a machine tool state detection module 90 and a humidity detection module 100; the α The axis rotation module 40 is fixed with the X-axis sliding module 50 , the Y-axis sliding module 60 and the Z-axis sliding module 70 to form a four-dimensional moving platform; the worktable 140 is fixed on the α-axis rotation module 40 .

The liquid nitrogen safety valve 110 , the machine tool status indicator 120 and the dry air solenoid valve 130 are electrically connected to the liquid nitrogen level detection module 80 , the machine tool status detection module 90 and the humidity detection module 100 , respectively.

The rotation control unit 31 controls the α-axis rotation module 40 to rotate around the α-axis, thereby driving the worktable 140 fixed on it to rotate around the α-axis, and the rotation range is 0° to 360°, and the α-axis is parallel to the Z-axis; The workpiece to be processed is fixed on the table 140, and the table 140 is rotated to change the angle of the workpiece relative to the jet nozzle.

The auxiliary equipment control unit 32 receives the feedback signal from the liquid nitrogen level detection module 80. If it is detected that the actual liquid nitrogen level value in the heat exchanger is lower than the set value, the auxiliary equipment control unit 32 will pass the liquid nitrogen level. The nitrogen liquid level detection module 80 controls the liquid nitrogen safety valve 110 to perform liquid nitrogen supplementation, and stops the liquid nitrogen supplementation when the set liquid level value is reached.

The auxiliary equipment control unit 32 controls the machine tool status indicator 120 according to the signal sent by the machine tool status detection module 90 to indicate the status of the machine tool.

The auxiliary equipment control unit 32 receives the feedback signal from the humidity detection module 100. If it is detected that the actual humidity value in the processing chamber is higher than the set value, the auxiliary equipment control unit 32 will control the drying air through the humidity detection module 100. The solenoid valve 130 performs dry air supplement, and stops dry air supplement after reaching the set humidity value.

The linear movement control unit 33 performs linear movement control on the X-axis sliding module 50, the Y-axis sliding module 60 and the Z-axis sliding module 70, and the adjustment strokes of the three axes are all ±50mm and can be adjusted during processing. Real-time position feedback is carried out according to the actual situation of processing.

Before the humidity detection module 100 starts processing, if it detects that the initial humidity value in the processing chamber is higher than the set value, the machine tool control module 30 will receive the feedback signal and make the machine tool stand by, and the dry air will be replenished until it reaches the set value. After setting the humidity value, make the machine work and carry out processing.

Beneficial effects of the present invention:

The invention designs a special control system for a low-temperature micro-abrasive gas jet machining machine tool, which can not only control the humidity in the machining chamber of the machine tool and the liquid nitrogen level in the heat exchanger during the machining process, but also perform real-time position feedback of the workpiece, so as to improve the performance of the workpiece. Processing quality and processing efficiency at low temperatures.

Description of drawings

FIG. 1 is a block diagram of a special control system for a machine tool of the present invention.

FIG. 2 is a schematic diagram of the interior of the machining chamber of the machine tool of the present invention.

In the figure: 10 is the input module; 20 is the output module; 30 is the machine tool control module; 31 is the rotation control unit; 32 is the auxiliary equipment control unit; 33 is the linear movement control unit; 40 is the α-axis rotation module; 50 is the X-axis sliding module; 60 is the Y-axis sliding module; 70 is the Z-axis sliding module; 80 is the liquid nitrogen level detection module; 90 is the machine tool status detection module; 100 is the humidity detection module; 110 120 is a machine tool status indicator light; 130 is a dry air solenoid valve; 140 is a workbench; 150 is a polymer workpiece; 160 is a jet nozzle; 170 is a heat exchanger.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

As shown in Figures 1 and 2.

A special control system for a low-temperature micro-abrasive air jet machining machine tool, which includes an input module 10, an output module 20, a machine tool control module 30, an α-axis rotation module 40, an X-axis sliding module 50, and a Y-axis sliding module. 60. Z-axis sliding module 70, liquid nitrogen liquid level detection module 80, machine tool status detection module 90, humidity detection module 100, liquid nitrogen safety valve 110, machine tool status indicator light 120, dry air solenoid valve 130, work Stage 140; as shown in FIG. 1 . The machine tool control module 30 is respectively connected with the input module 10, the output module 20, the α-axis rotation module 40, the X-axis sliding module 50, the Y-axis sliding module 60, the Z-axis sliding module 70, and the liquid nitrogen. The liquid level detection module 80, the machine tool state detection module 90, and the humidity detection module 100 are electrically connected; the α-axis rotation module 40 is connected with the X-axis sliding module 50, the Y-axis sliding module 60 and the Z-axis sliding module The module 70 is fixed to form a four-dimensional mobile platform; the liquid nitrogen safety valve 110, the machine tool status indicator 120 and the dry air solenoid valve 130 are respectively connected with the liquid nitrogen liquid level detection module 80, the machine tool status detection module 90 and the humidity detection module The module 100 is electrically connected; the worktable 140 is fixed on the α-axis rotation module 40 . The input module 10 is used for inputting numerical control codes, setting the humidity value of the processing chamber and setting the liquid nitrogen level value in the heat exchanger. The output module 20 can display the running state of the numerical control code, the real-time humidity value of the processing chamber, and the real-time liquid nitrogen level value in the heat exchanger. The machine tool control module 30 includes a rotation control unit 31, an auxiliary equipment control unit 32 and a linear movement control unit 33; the rotation control unit 31 is electrically connected with the α-axis rotation module 40; the auxiliary equipment controls The unit 32 is electrically connected with the liquid nitrogen level detection module 80 , the machine tool state detection module 90 and the humidity detection module 100 ; the linear movement control unit 33 is electrically connected with the X-axis sliding module 50 and the Y-axis sliding module 60 And the Z-axis sliding module 70 is electrically connected. The rotation control unit 31 can control the α-axis rotation module 40 to rotate around the α-axis (the α-axis is parallel to the Z-axis), thereby driving the worktable 140 fixed on it to rotate around the α-axis, and the rotation range is 0°~360°. °; the workpiece to be processed is fixed on the table 140, and the rotation of the table 140 can change the angle of the workpiece relative to the jet nozzle, thereby changing the processing angle. The auxiliary equipment control unit 32 can receive the feedback signal from the liquid nitrogen liquid level detection module 80. If it is detected that the actual liquid nitrogen level value in the heat exchanger is lower than the set value, the auxiliary equipment control unit 32 will pass the feedback signal. The liquid nitrogen liquid level detection module 80 controls the liquid nitrogen safety valve 110 to perform liquid nitrogen replenishment, and stops the liquid nitrogen replenishment when the set liquid level value is reached, which can ensure the adequacy of the cooling of the micro-abrasive gas jet. The auxiliary equipment control unit 32 can control the machine tool status indicator 120 according to the signal sent by the machine tool status detection module 90 to indicate the status of the machine tool. The auxiliary equipment control unit 32 can receive the feedback signal from the humidity detection module 100. If it is detected that the actual humidity value in the processing chamber is higher than the set value, the auxiliary equipment control unit 32 will control the drying through the humidity detection module 100. The air solenoid valve 130 performs dry air supplementation, and stops dry air supplementation after reaching the set humidity value, which can effectively prevent the water vapor in the air from liquefying and freezing to block the jet nozzle during low temperature processing. The linear movement control unit 33 can perform linear movement control on the X-axis sliding module 50, the Y-axis sliding module 60 and the Z-axis sliding module 70, and the adjustment strokes of the three axes are all ±50mm and during the processing In the process, real-time position feedback can be carried out according to the actual situation of processing. The X-axis sliding module 50, the Y-axis sliding module 60 and the Z-axis sliding module 70 will drive the α-axis rotating module 40 fixed thereon to move when moving, thereby driving the workpiece to move and changing the processing distance. and processing parts. The special control system for the low-temperature micro-abrasive air jet machining machine tool is characterized in that before the humidity detection module 100 starts processing, if it detects that the initial humidity value in the machining chamber is higher than the set value, the machine tool control module The group 30 will receive its feedback signal and make the machine tool stand by, and after the supplementary dry air reaches the set humidity value, the machine tool will work and be processed. It should be noted that the key of the present invention is the setting and coordination of each module. As for the specific structure and circuit of each module, the existing technology can be used for self-design and manufacture, and such design and manufacture are very important to those skilled in the art. It is self-evident in terms of personnel.

The working process of the present invention is:

As shown in FIG. 1, input the numerical control code through the input module 10, set the required humidity value in the processing chamber during processing, and set the required liquid nitrogen level value in the heat exchanger 170 during processing; the output module Group 20 will display the input numerical control code, the set value of the humidity in the processing chamber, and the set value of the liquid nitrogen level in the heat exchanger 170 before machining, and display the running status of the numerical control code, processing The real-time humidity value of the chamber and the real-time liquid nitrogen level value in the heat exchanger 170 are shown in FIG. 2 . If, before processing, the humidity detection module 100 detects that the initial humidity value in the processing chamber is higher than the set value, the machine tool control module 30 will receive its feedback signal through the equipment auxiliary control unit 32 and make the machine tool stand by, waiting for the drying air to pass through. The solenoid valve 130 supplies dry air into the processing chamber to reach the set humidity value, and then makes the machine tool work and enter the processing process. The micro-abrasive gas jet is cooled by the liquid nitrogen in the heat exchanger 170 , and after cooling, it is ejected through the jet nozzle 160 fixed on the heat exchanger 170 to process the polymer workpiece 150 . The auxiliary equipment control unit 32 can receive the feedback signal of the liquid nitrogen level detection module 80. If it is detected that the actual liquid nitrogen level value in the heat exchanger 170 is lower than the set value, the auxiliary equipment control unit 32 will pass the liquid nitrogen The liquid level detection module 80 controls the liquid nitrogen safety valve 110 to replenish the liquid nitrogen, and stops the liquid nitrogen replenishment when the set liquid level is reached, so as to ensure the adequacy of the cooling of the micro-abrasive gas jet. The α-axis rotation module 40 is fixed with the X-axis sliding module 50, the Y-axis sliding module 60 and the Z-axis sliding module 70 to form a four-dimensional mobile platform; the four-dimensional mobile platform rotates the control unit 31 according to the input numerical control code. And the linear movement control unit 33 makes the high molecular polymer workpiece 150 fixed on the table 140 move along the three directions of the X axis, the Y axis and the Z axis and rotate around the α axis direction, so that the high molecular polymer workpiece 150 and the The relative position between the jet nozzles 160 can change the processing location, processing distance and processing angle. The auxiliary equipment control unit 32 can control the machine tool status indicator 120 according to the signal sent by the machine tool status detection module 90 to indicate the status of the machine tool.

The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims (8)

1. A special control system for a low-temperature micro-abrasive gas jet machining machine tool, characterized in that it comprises a machine tool control module ( 30), the machine tool control module (30) is connected with an input module (10) and an output module (20), the input module (10) is used for inputting numerical control codes, setting the humidity value of the processing chamber and setting The liquid nitrogen level value in the heat exchanger is fixed, and the output module (20) is used to display the running state of the numerical control code, the real-time humidity value of the processing chamber, and the real-time liquid nitrogen level value in the heat exchanger; the rotation control unit ( 31) An α-axis rotation module (40) is connected, and the linear movement control unit (33) is connected with an X-axis sliding module (50), a Y-axis sliding module (60), and a Z-axis sliding module (70); auxiliary The equipment control unit (32) is connected with a liquid nitrogen level detection module (80), a machine tool state detection module (90) and a humidity detection module (100); the α-axis rotation module (40) is connected to the X-axis The sliding module (50), the Y-axis sliding module (60) and the Z-axis sliding module (70) are fixed to form a four-dimensional moving platform; the worktable (140) is fixed on the α-axis rotating module (40). 2. The special control system for low-temperature micro-abrasive gas jet machining machine tools according to claim 1, characterized in that the liquid nitrogen safety valve (110), the machine tool status indicator light (120) and the dry air solenoid valve (130) are respectively connected with the liquid nitrogen safety valve (110), the machine tool status indicator light (120) and the dry air solenoid valve (130). The nitrogen liquid level detection module (80), the machine tool state detection module (90) and the humidity detection module (100) are electrically connected. 3. The special control system for a low-temperature micro-abrasive gas jet machining machine tool according to claim 1, wherein the rotation control unit (31) controls the α-axis rotation module (40) to rotate around the α-axis, thereby driving the fixed The worktable (140) on it rotates around the α-axis, the rotation range is 0°~360°, and the α-axis is parallel to the Z-axis; the workpiece to be processed is fixed on the worktable (140), and the worktable (140) rotates to Change the angle of the workpiece relative to the jet nozzle. 4. The special control system for low-temperature micro-abrasive gas jet machining machine tools according to claim 1, characterized in that the auxiliary equipment control unit (32) receives the feedback signal of the liquid nitrogen level detection module (80), if When it is detected that the actual liquid nitrogen level value in the heat exchanger is lower than the set value, the auxiliary equipment control unit (32) will control the liquid nitrogen safety valve (110) through the liquid nitrogen liquid level detection module (80) to carry out liquid nitrogen Replenish, stop liquid nitrogen replenishment after reaching the set liquid level value. 5. The special control system for a low-temperature micro-abrasive gas jet machining machine tool according to claim 1, wherein the auxiliary equipment control unit (32) controls the machine tool state indication according to the signal sent by the machine tool state detection module (90). light (120) to indicate the state of the machine tool. 6. The special control system for a low-temperature micro-abrasive gas jet machining machine tool according to claim 1, characterized in that the auxiliary equipment control unit (32) receives the feedback signal of the humidity detection module (100), and if it detects the processing When the actual humidity value in the chamber is higher than the set value, the auxiliary equipment control unit (32) will control the dry air solenoid valve (130) through the humidity detection module (100) to supplement dry air, and stop drying after reaching the set humidity value Air supplement. 7. The special control system for a low-temperature micro-abrasive air jet machining machine tool according to claim 4, wherein the linear movement control unit (33) controls the X-axis sliding module (50), the Y-axis sliding module ( 60) and the Z-axis sliding module (70) for linear movement control, the adjustment strokes of the three axes are ±50mm, and real-time position feedback can be performed according to the actual processing conditions during the processing. 8. The special control system for a low-temperature micro-abrasive air jet machining machine tool according to claim 1, characterized in that before the humidity detection module (100) starts to process, if it detects the initial humidity value in the machining chamber If the humidity is higher than the set value, the machine tool control module (30) will receive its feedback signal and make the machine tool stand by, and after the supplementary dry air reaches the set humidity value, the machine tool will work for processing.

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