A pneumatic chuck air tightness detection device for casting machining

Abstract

The present application relates to machine tool accessory detection device technical field, especially to a kind of pneumatic chuck air tightness detection device for casting machining, comprising: support frame and detection tank;The mounting bracket is slidably connected on the support frame, the mounting bracket and the support frame are fixed by bolt, the detection tank is installed on the mounting bracket, the air pressure sensor is fixedly connected in the detection tank, and the connection interface is fixedly connected on the detection tank;Load mechanism is provided on the mounting bracket, the load mechanism simulates centrifugal force, clamping force, cutting force and vibration impact that pneumatic chuck is subjected to in actual work;The rotating block is rotatably connected to the mounting block in the present application, the connection interface on the detection tank is connected with the gas circuit of pneumatic chuck, then the clamping block on the rotating block is clamped by pneumatic chuck, and machining equipment drives pneumatic chuck, clamping block and rotating block to rotate, so as to detect the air tightness of pneumatic chuck when clamping workpiece and rotating.

Description

Technical Field

[0001] This invention relates to the field of machine tool accessory testing devices, and more particularly to a pneumatic chuck airtightness testing device for casting machining. Background Technology

[0002] Pneumatic chucks are clamping components in CNC machine tools. Unlike the common three-jaw chucks, pneumatic chucks use compressed air to drive the internal piston and lever mechanism, thereby realizing the clamping and releasing of the jaws on the pneumatic chuck. Pneumatic chucks are widely used because of their fast response speed, high degree of automation and stable clamping force. During the machining of castings, debris and dust contaminants can penetrate into the pneumatic chuck, causing wear or blockage of the air passages, thus affecting the airtightness of the pneumatic chuck. Currently, the airtightness testing of pneumatic chucks is mainly conducted when the CNC machine tool is stopped from machining. This testing condition does not match the actual conditions under which the pneumatic chuck is subjected to centrifugal force, clamping force, cutting force, and vibration impact when actually clamping castings. Under the action of centrifugal force, the internal sealing ring of the pneumatic chuck will undergo radial displacement, causing leakage. When the pneumatic chuck is clamping castings, the tie rod of the pneumatic chuck will undergo slight elastic deformation, resulting in uneven local sealing pressure. These conditions cannot be detected when the CNC machine tool is stopped. Therefore, the results of the airtightness testing of pneumatic chucks in the existing technology deviate from the actual situation when the machine tool is stopped, thus causing limitations.

[0003] Therefore, we propose a pneumatic chuck airtightness testing device for casting machining. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a pneumatic chuck airtightness testing device for casting machining, which overcomes the shortcomings of the prior art and aims to solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pneumatic chuck airtightness testing device for casting machining, comprising: The system comprises a support frame, a mounting frame, a mounting block, and a testing tank. The mounting block is mounted on the mounting frame, and the mounting frame and the support frame are fixed together by bolts. The testing tank is mounted on the mounting frame, and a pressure sensor is fixedly connected inside the testing tank. A connection interface is fixedly connected to the testing tank. The mounting bracket is equipped with a load mechanism that simulates the centrifugal force experienced by the pneumatic chuck during actual operation.

[0006] Preferably, the load mechanism includes a rotating block and a clamping block; the mounting bracket is equipped with a mounting block, the rotating block is rotatably connected to the mounting block, the rotating block has a clamping groove, the clamping block is slidably connected in the clamping groove, a pressure block is slidably connected in the clamping groove, a pressure sensor is fixedly connected to the pressure block, a clamping electric push rod is fixedly connected in the clamping groove, and the output end of the clamping electric push rod is fixedly connected to the pressure block.

[0007] By rotating the rotating block onto the mounting block, connecting the interface on the test tank to the air circuit of the pneumatic chuck, and then clamping the clamping block on the rotating block with the pneumatic chuck, the machining equipment drives the pneumatic chuck, clamping block and rotating block to rotate, thereby testing the airtightness of the pneumatic chuck when clamping the workpiece and rotating.

[0008] Preferably, the load mechanism further includes an arc-shaped loading block, the rotating block has a transverse groove, a transverse block is slidably connected in the transverse groove, a longitudinal block is slidably connected on the transverse block, a transverse electric push rod is connected between the rotating block and the transverse block, a longitudinal electric push rod is connected between the transverse block and the longitudinal block, the arc-shaped loading block is fixedly connected to the longitudinal block; a contact block is slidably connected to the clamping block; A second pressure sensor is connected between the output end of the transverse electric push rod and the transverse block, and a third pressure sensor is connected between the longitudinal electric push rod and the longitudinal block.

[0009] Preferably, a vibrating block is installed on the rotating block; a vibration groove is formed inside the vibrating block; an electromagnetic exciter and an excitation force sensor are fixedly connected inside the vibration groove.

[0010] Preferably, the vibrating block and the rotating block are rotatably connected, and the rotating block has a fixing groove; a fixing block is slidably connected to the vibrating block; an engaging electric push rod is connected between the fixing block and the vibrating block; a circumferential motor is fixedly connected to the vibrating block, a gear is fixedly connected to the output end of the circumferential motor, a gear ring is fixedly connected to the rotating block, and the gear at the output end of the circumferential motor meshes with the gear ring.

[0011] By setting a vibration block on the rotating block, the vibration generated by the electromagnetic exciter in the vibration block is transmitted to the pneumatic chuck, thereby simulating the intermittent cutting vibration and machine tool vibration generated when the pneumatic chuck clamps the workpiece for processing, and reproducing the airtightness of the pneumatic chuck under the condition of separation and leakage of the pneumatic chuck sealing surface caused by vibration.

[0012] Preferably, the mounting block is rotatably connected to the mounting frame, and a handle is rotatably connected to the mounting frame, with the handle being fixedly connected to the mounting block.

[0013] Preferably, the clamping block, the vibrating block, and the transverse block are axially spaced evenly on the rotating block.

[0014] In this invention, when the pneumatic chuck is installed on the vertically positioned side of the machining equipment, the handle can be rotated to rotate the mounting block, allowing the rotating block to be positioned laterally. The rotating block and the clamping block are laterally oriented towards the pneumatic chuck. Thus, this invention can adapt to different installation positions of the pneumatic chuck on the machining equipment and can perform airtightness testing on the pneumatic chuck in all cases. The clamping block, vibration block, and lateral block of this invention are all evenly distributed on the rotating block. Therefore, during the rotation of the rotating block, vibration will not occur due to the center of gravity shifting off the axis, thus not affecting the airtightness testing of the pneumatic chuck.

[0015] The beneficial effects of this invention are: 1. This invention detects the airtightness of the pneumatic chuck when clamping and rotating a workpiece by rotating a rotating block and connecting the connection interface on the detection tank to the air circuit of the pneumatic chuck. The pneumatic chuck then clamps the clamping block on the rotating block, and the machining equipment drives the pneumatic chuck, clamping block and rotating block to rotate.

[0016] 2. This invention simulates the intermittent cutting vibration and machine tool vibration generated when a pneumatic chuck clamps a workpiece for processing by setting a vibration block on the rotating block and transmitting the vibration to the pneumatic chuck through an electromagnetic vibrator inside the vibration block. This reproduces the airtightness of the pneumatic chuck under the condition of separation and leakage of the pneumatic chuck sealing surface caused by vibration. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the rotating block, clamping block, and vibrating block in this invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a partial cross-sectional view of the rotating block, clamping block, contact block, and transverse block in this invention; Figure 5 This is a partial cross-sectional view of the rotating block and the vibrating block in this invention.

[0018] In the diagram: 1. Support frame; 11. Mounting frame; 12. Detection tank; 13. Connection interface; 14. Mounting block; 21. Rotating block; 22. Clamping block; 23. Clamping groove; 24. Pressure block; 25. Pressure sensor No. 1; 26. Clamping electric push rod; 27. Arc-shaped loading block; 28. Transverse groove; 29. ​​Transverse block; 3. Longitudinal block; 31. Transverse electric push rod; 32. Longitudinal electric push rod; 33. Pressure sensor No. 2; 34. Pressure sensor No. 3; 35. Vibration block; 36. Vibration groove; 37. Electromagnetic vibrator; 38. Vibration force sensor; 4. Fixing groove; 41. Fixing block; 42. Engaging electric push rod; 43. Surrounding motor; 44. Gear; 45. Gear ring; 5. Handle; 6. Contact block. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Refer to the appendix of the instruction manual. Figures 1 to 5 A pneumatic chuck airtightness testing device for casting machining, comprising: Support frame 1, mounting frame 11, mounting block 14 and detection tank 12; mounting block 14 is mounted on mounting frame 11, and mounting frame 11 and support frame 1 are fixed together by bolts; detection tank 12 is mounted on mounting frame 11, and a pressure sensor is fixedly connected inside detection tank 12; connection interface 13 is fixedly connected on detection tank 12. The mounting bracket 11 is equipped with a load mechanism that simulates the centrifugal force experienced by the pneumatic chuck during actual operation.

[0021] In this invention, the load mechanism includes a rotating block 21 and a clamping block 22; a mounting block 14 is mounted on the mounting frame 11, the rotating block 21 is rotatably connected to the mounting block 14, a clamping groove 23 is provided on the rotating block 21, the clamping block 22 is slidably connected in the clamping groove 23, a pressure block 24 is slidably connected in the clamping groove 23, a pressure sensor 25 is fixedly connected to the pressure block 24, a clamping electric push rod 26 is fixedly connected in the clamping groove 23, and the output end of the clamping electric push rod 26 is fixedly connected to the pressure block 24.

[0022] In this invention, the pneumatic chuck is mounted on a horizontally positioned machining table. When performing an airtightness test on the pneumatic chuck used for machining castings, the invention is first moved next to the machining equipment. The support frame 1 is placed on the machining equipment and can be bolted to it. Then, the bolts on the support frame 1 are loosened, allowing the mounting frame 11 to slide against it. The mounting frame 11, mounting block 14, and rotating block 21 are then slid downwards, causing the clamping block 22 on the rotating block 21 to extend onto the pneumatic chuck. Next, the two connection ports 13 on the test tank 12 are connected in series with the airway ports of the pneumatic chuck via flexible hoses. Therefore, the pneumatic chuck can clamp objects... The pneumatic chuck can detect the air pressure in the air passage in real time. The machining equipment fills the pneumatic chuck with compressed air, so that the pneumatic chuck clamps the clamping block 22 on the rotating block 21. The pressure sensor 25 on the pressure block 24 can detect the clamping force when the pneumatic chuck clamps the clamping block 22 in real time. The machining equipment drives the pneumatic chuck to rotate, and the pneumatic chuck then drives the clamping block 22 and the rotating block 21 to rotate. The pneumatic chuck is subjected to centrifugal force. Therefore, the present invention can detect the air tightness of the pneumatic chuck when it rotates, so that when the air tightness of the pneumatic chuck is detected, the state of the pneumatic chuck is the same as when it clamps the workpiece and drives the workpiece to rotate. In this invention, the clamping electric push rod 26 pushes the pressure block 24 and the clamping block 22 to move, thereby adjusting the length of the clamping block 22 extending out of the rotating block 21, and detecting the airtightness of the pneumatic chuck when clamping workpieces of different sizes. The present invention rotatably connects the rotating block 21 to the mounting block 14, connects the connection interface 13 on the detection tank 12 to the air circuit of the pneumatic chuck, and then clamps the clamping block 22 on the rotating block 21 through the pneumatic chuck. The machining equipment drives the pneumatic chuck, clamping block 22 and rotating block 21 to rotate, thereby detecting the airtightness of the pneumatic chuck when clamping the workpiece and rotating.

[0023] Example 2: Based on Example 1, refer to the appendix of the instruction manual. Figures 1 to 5 In this invention, the load mechanism further includes an arc-shaped loading block 27, a transverse groove 28 is provided on the rotating block 21, a transverse block 29 is slidably connected in the transverse groove 28, a longitudinal block 3 is slidably connected on the transverse block 29, a transverse electric push rod 31 is connected between the rotating block 21 and the transverse block 29, a longitudinal electric push rod 32 is connected between the transverse block 29 and the longitudinal block 3, the arc-shaped loading block 27 is fixedly connected to the longitudinal block 3; a contact block 6 is slidably connected on the clamping block 22; A second pressure sensor 33 is connected between the output end of the transverse electric push rod 31 and the transverse block 29, and a third pressure sensor 34 is connected between the longitudinal electric push rod 32 and the longitudinal block 3.

[0024] In this invention, a vibration block 35 is installed on the rotating block 21; a vibration groove 36 is provided inside the vibration block 35; an electromagnetic exciter 37 and an excitation force sensor 38 are fixedly connected inside the vibration groove 36.

[0025] In this invention, the vibrating block 35 and the rotating block 21 are rotatably connected, and the rotating block 21 is provided with a fixing groove 4; the vibrating block 35 is slidably connected with a fixing block 41; the fixing block 41 and the vibrating block 35 are connected with an engaging electric push rod 42; the vibrating block 35 is fixedly connected with a circumferential motor 43, the output end of the circumferential motor 43 is fixedly connected with a gear 44, the rotating block 21 is fixedly connected with a gear ring 45, and the gear 44 at the output end of the circumferential motor 43 meshes with the gear ring 45.

[0026] In this invention, the cross-sectional shape of the arc-shaped loading block 27 is an inverted L-shape. The transverse electric push rod 31 pushes the transverse block 29, the longitudinal block 3, and the arc-shaped loading block 27 toward the clamping block 22. The longitudinal electric push rod 32 pushes the longitudinal block 3 and the arc-shaped loading block 27 toward the clamping block 22. Therefore, the arc-shaped loading block 27 contacts the contact block 6 on the clamping block 22. The transverse block 29 can push the contact block 6 to slide laterally. Thus, the contact block 6 pushes the pneumatic chuck laterally through friction, thereby simulating the dynamic cutting load when the pneumatic chuck clamps the workpiece for rough machining. This causes the pneumatic chuck housing and internal parts to undergo dynamic deformation, thus reproducing the change in sealing gap caused by deformation. In this invention, a vibration block 35 is provided on the outside of the rotating block 21. The electromagnetic exciter 37 inside the vibration block 35 generates a changing magnetic field through the alternating current of the electromagnetic coil, which drives the magnet block inside the electromagnetic exciter 37 back and forth, thereby generating vibration. The vibration block 35 transmits the vibration to the rotating block 21, the clamping block 22 and the pneumatic chuck through the rotatable connection between the vibration block 35 and the rotating block 21, applying vibration impact to the pneumatic chuck, thereby simulating the intermittent cutting vibration and machine tool vibration when the pneumatic chuck clamps the workpiece for processing, and reproducing the separation and leakage of the pneumatic chuck sealing surface caused by vibration. The surrounding motor 43 on the vibration block 35 drives the corresponding gear 44 to rotate, so that the vibration block 35 rotates outside the rotating block 21. Therefore, when the pneumatic chuck stops rotating, the vibration block 35 can be slowly rotated around the rotating block 21, while the electromagnetic exciter 37 generates vibration, allowing the vibration to be transmitted to the pneumatic chuck from different angles, simulating vibration from multiple angles. The excitation force sensor 38 detects the vibration intensity generated by the electromagnetic exciter 37. The engaging electric push rod 42 on the vibrating block 35 pushes the fixing block 41 into the fixing groove 4 on the rotating block 21. Therefore, when the vibrating block 35 is not rotating, the vibrating block 35 and the rotating block 21 are connected by the fixing block 41, which increases the intensity of the vibration transmitted to the rotating block 21 and the pneumatic chuck. The present invention simulates the intermittent cutting vibration and machine tool vibration generated when the pneumatic chuck clamps the workpiece for processing by setting a vibration block 35 on the rotating block 21 and transmitting the vibration generated by the electromagnetic exciter 37 in the vibration block 35 to the pneumatic chuck. This invention reproduces the airtightness of the pneumatic chuck under the condition of separation and leakage of the sealing surface of the pneumatic chuck caused by vibration.

[0027] In this invention, the mounting block 14 is rotatably connected to the mounting frame 11, and the support frame 1 is rotatably connected to the handle 5, which is fixedly connected to the mounting block 14.

[0028] In this invention, the clamping block 22, the vibrating block 35, and the transverse block 29 are axially spaced and evenly distributed on the rotating block 21.

[0029] In this invention, when the pneumatic chuck is installed on the vertically positioned side of the machining equipment, the handle 5 can be rotated to rotate the mounting block 14, causing the rotating block 21 to be positioned laterally. The rotating block 21 and the clamping block 22 are laterally facing the pneumatic chuck. Thus, this invention can adapt to different positions of the pneumatic chuck on the machining equipment and can perform airtightness testing on the pneumatic chuck in all cases. The clamping block 22, the vibration block 35, and the lateral block 29 are all evenly distributed on the rotating block 21. Therefore, during the rotation of the rotating block 21, vibration will not occur due to the center of gravity shifting off the axis, thus not affecting the airtightness testing of the pneumatic chuck.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic chuck airtightness testing device for casting machining, characterized in that: include: The support frame (1), mounting frame (11), mounting block (14), and detection tank (12) are provided. The mounting block (14) is mounted on the mounting frame (11), the mounting frame (11) is slidably connected to the support frame (1) and the mounting frame (1) are fixed together by bolts. The detection tank (12) is mounted on the mounting frame (11), a pressure sensor is fixedly connected inside the detection tank (12), and a connection interface (13) is fixedly connected to the detection tank (12). The mounting bracket (11) is provided with a load mechanism, which simulates the centrifugal force experienced by the pneumatic chuck in actual operation.

2. The pneumatic chuck airtightness testing device for casting machining according to claim 1, characterized in that: The load mechanism includes a rotating block (21) and a clamping block (22); a mounting block (14) is mounted on the mounting frame (11), the rotating block (21) is rotatably connected to the mounting block (14), a clamping groove (23) is provided on the rotating block (21), the clamping block (22) is slidably connected in the clamping groove (23), a pressure block (24) is slidably connected in the clamping groove (23), a pressure sensor (25) is fixedly connected on the pressure block (24), a clamping electric push rod (26) is fixedly connected in the clamping groove (23), and the output end of the clamping electric push rod (26) is fixedly connected to the pressure block (24).

3. The pneumatic chuck airtightness testing device for casting machining according to claim 2, characterized in that: The load mechanism further includes an arc-shaped loading block (27), a transverse groove (28) is provided on the rotating block (21), a transverse block (29) is slidably connected in the transverse groove (28), a longitudinal block (3) is slidably connected on the transverse block (29), a transverse electric push rod (31) is connected between the rotating block (21) and the transverse block (29), a longitudinal electric push rod (32) is connected between the transverse block (29) and the longitudinal block (3), the arc-shaped loading block (27) is fixedly connected to the longitudinal block (3); a contact block (6) is slidably connected on the clamping block (22); The output end of the transverse electric push rod (31) is connected to the transverse block (29) by a second pressure sensor (33), and the longitudinal electric push rod (32) is connected to the longitudinal block (3) by a third pressure sensor (34).

4. The pneumatic chuck airtightness testing device for casting machining according to claim 3, characterized in that: A vibration block (35) is installed on the rotating block (21); a vibration groove (36) is provided in the vibration block (35); an electromagnetic exciter (37) and an excitation force sensor (38) are fixedly connected in the vibration groove (36).

5. The pneumatic chuck airtightness testing device for casting machining according to claim 4, characterized in that: The vibrating block (35) is rotatably connected to the rotating block (21), and a fixed groove (4) is provided on the rotating block (21); a fixed block (41) is slidably connected to the vibrating block (35); an engaging electric push rod (42) is connected between the fixed block (41) and the vibrating block (35); a circumferential motor (43) is fixedly connected to the vibrating block (35), and a gear (44) is fixedly connected to the output end of the circumferential motor (43); a gear ring (45) is fixedly connected to the rotating block (21), and the gear (44) at the output end of the circumferential motor (43) meshes with the gear ring (45).

6. The pneumatic chuck airtightness testing device for casting machining according to claim 5, characterized in that: The mounting block (14) is rotatably connected to the mounting frame (11), and a handle (5) is rotatably connected to the mounting frame (11). The handle (5) is fixedly connected to the mounting block (14).

7. The pneumatic chuck airtightness testing device for casting machining according to claim 6, characterized in that: The clamping block (22), the vibrating block (35), and the transverse block (29) are axially spaced evenly on the rotating block (21).

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