A thrust plate vacuum suction tool

Abstract

The utility model discloses a kind of thrust washer vacuum suction tool, it relates to machining technical field, including high-precision pneumatic diaphragm chuck, dog, vacuum suction seat and vacuum suction cover, the high-precision pneumatic diaphragm chuck includes shell and multiple moving chucks, moving chuck can be simultaneously radially moved on shell end face, the dog includes the fixed part and circular ring part equal to the number of moving chuck, the fixed part is fixed by screw and is set on corresponding moving chuck;The utility model drives the moving chuck of its moving end by high-precision pneumatic diaphragm chuck and is simultaneously radially moved, to drive the radial movement of the limiting portion on dog, the radial location clamping of thrust washer is carried out, then by external air compressor suction, the cavity difference of vacuum suction seat and vacuum suction cover generates negative pressure, to carry out axial adsorption to the end surface of thrust washer by suction hole, make it fixed stable, and thrust washer will not be damaged, improve the processing quality of product.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a thrust plate vacuum suction fixture. Background Technology

[0002] As a critical mechanical component, thrust washers have extremely stringent requirements for dimensional accuracy, geometric tolerances, and surface quality. During precision machining processes such as turning and grinding, achieving stable, reliable, and damage-free clamping is a core prerequisite for ensuring machining quality.

[0003] Currently, existing technologies commonly use cylinder-driven clamping devices to fix thrust plates. These devices typically employ a three-point radial clamping method, that is, applying radial clamping force from the outer circumference or inner hole of the thrust plate through three jaws to fix the workpiece.

[0004] However, the three-point clamping method presents a contradiction when operating on thrust plates: insufficient clamping force can lead to unstable clamping, affecting subsequent processing; excessive clamping force can generate significant radial stress at the clamping point, which may cause elastic deformation or even plastic deformation in thrust plates with thin walls or soft materials. After removing the clamping force, critical dimensional tolerances such as roundness and flatness of the workpiece may exceed the tolerance, thus affecting product accuracy and yield.

[0005] Therefore, there is an urgent need in the field for a thrust plate clamping fixture that can overcome the above-mentioned defects, provide stable clamping, and effectively prevent workpiece clamping deformation. Utility Model Content

[0006] To address the aforementioned shortcomings of existing technologies, this utility model provides a thrust plate vacuum suction fixture. A high-precision pneumatic diaphragm chuck drives the moving chuck at its movable end to move radially simultaneously, thereby causing the limiting part on the jaws to move radially, thus radially limiting and clamping the thrust plate. Then, an external air compressor draws air, creating a negative pressure difference between the vacuum suction base and the vacuum suction cover cavity, thereby axially adsorbing the end face of the thrust plate through the suction hole, fixing it stably without damaging the thrust plate and improving the product's processing quality.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a thrust plate vacuum suction fixture, comprising a high-precision pneumatic diaphragm chuck, jaws, a vacuum suction base, and a vacuum suction cover. The high-precision pneumatic diaphragm chuck includes a housing and multiple movable chucks, which can move radially simultaneously on the end face of the housing. The jaws include a number of fixed portions and annular portions equal to the number of movable chucks. The fixed portions are fixedly mounted on the corresponding movable chucks by screws. The multiple fixed portions form a virtual annulus. Each fixed portion has a limiting portion extending axially upward from its outer edge, forming a virtual cylindrical housing. Each fixed portion has a deformable portion extending axially downward from its inner edge. The width of the deformable portion is smaller than the width of the fixed portion. The lower ends of the multiple deformable portions are fixedly connected to the upper end face of the annulus portion. The movement of the multiple movable chucks can drive the fixed portions and limiting portions to move radially a certain distance, and the deformable portions... The vacuum suction base includes a disc-shaped base plate and a base, which undergo elastic deformation with the annular portion. The base is fixedly mounted on the lower bottom surface of the base plate and is coaxially designed. The outer diameter of the base is smaller than the inner diameter of the annular portion, and the outer diameter of the base plate is smaller than the inner diameter of the virtual cylindrical shell formed by multiple limiting portions. The base plate and the base are fixedly mounted on the end face of the shell by multiple screws and are coaxially designed with the shell. The lower bottom surface of the base plate is higher than the upper surface of the fixed portion. A through vacuum port is provided at the axial position of the base plate and the base. A through vacuum interface is provided at the center position of the shell. One end of the vacuum port is connected to the vacuum interface. The vacuum suction cover includes a disc-shaped cover plate. A side plate is provided with the axial downward extension of the edge of the cover plate. The cover plate and the side plate are fixedly mounted on the base plate of the vacuum suction base by multiple screws and form a cavity between them. Multiple suction holes are provided on the cover plate. The upper surface of the cover plate is lower than the upper end face of the limiting portion.

[0008] Preferably, the cover plate of the vacuum suction cap is provided with a limiting block that matches the shape of the thrust plate notch, and the limiting block is connected to the cover plate by screws.

[0009] Preferably, a groove is formed at the center of the upper surface of the vacuum suction cap.

[0010] Preferably, a sealing gasket is provided between the side plate and the bottom plate.

[0011] Preferably, the material of the claw is GCr15 that has undergone quenching and tempering treatment.

[0012] This utility model provides a thrust plate vacuum suction fixture, which has the following beneficial effects: 1. This utility model uses a high-precision pneumatic diaphragm chuck to drive the moving chuck at its moving end to move radially at the same time, thereby driving the limiting part on the chuck jaws to move radially and limit the thrust plate. Then, by using an external air compressor to draw air, a negative pressure is generated in the cavity of the vacuum suction seat and the vacuum suction cover, thereby axially adsorbing the end face of the thrust plate through the suction hole, making it fixed and stable without damaging the thrust plate, thus improving the processing quality of the product. 2. In this utility model, the cover plate of the vacuum suction cap is provided with a limiting block that matches the shape of the notch of the thrust plate. On the one hand, it limits the installation of the thrust plate and improves the accuracy of subsequent clamping. On the other hand, its surface is higher than the limiting part of the jaw, which avoids damage to the jaw due to operational errors or excessive processing during the processing, and has a protective function. 3. In this utility model, a groove is provided on the cover plate of the vacuum suction cap on the side facing the thrust plate. When the thrust plate is installed, the protrusion in the center of the thrust plate can be inserted into the groove, thereby ensuring that the end face of the thrust plate fits the cover plate and ensuring the effect of subsequent vacuum adsorption. Attached Figure Description

[0013] Figure 1 This is an exploded view of the thrust plate vacuum suction tool of this utility model from an oblique angle. Figure 2 This is an exploded view of a thrust plate vacuum suction tool according to the present invention from an oblique angle. Figure 3 This is a schematic diagram of the assembled thrust plate vacuum suction fixture of this utility model.

[0014] In the diagram: 1. High-precision pneumatic diaphragm chuck; 11. Housing; 12. Moving chuck; 2. Claw; 21. Fixing part; 22. Limiting part; 23. Deformable part; 24. Circular part; 25. Gap; 3. Vacuum suction base; 31. Base plate; 32. Base; 33. Vacuum port; 4. Vacuum suction cover; 41. Cover plate; 42. Suction hole; 43. Side plate; 44. Groove; 5. Limiting block; 6. Vacuum interface. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1-3As shown, a thrust plate vacuum suction fixture includes a high-precision pneumatic diaphragm chuck 1, jaws 2, a vacuum suction base 3, and a vacuum suction cover 4. The high-precision pneumatic diaphragm chuck 1 includes a housing 11 and multiple movable chucks 12, which can move radially simultaneously on the end face of the housing 11. The jaws 2 include a number of fixing parts 21 and annular parts 24 equal to the number of movable chucks 12. The fixing parts 21 are fixed to the corresponding movable chucks 12 by screws. The multiple fixing parts 21 form a virtual annulus. Each fixing part 21 has a limiting part 22 extending axially upward from its outer edge. The multiple limiting parts 24... 2. A virtual cylindrical shell 11 is formed. Each fixed part 21 has a deformable part 23 extending axially downwards from its inner edge. The width of the deformable part 23 is smaller than the width of the fixed part 21. The lower ends of multiple deformable parts 23 are fixedly connected to the upper surface of the annular part 24. Multiple movable chucks 12 can move the fixed part 21 and the limiting part 22 radially a certain distance, causing the deformable parts 23 and the annular part 24 to undergo elastic deformation. The vacuum suction seat 3 includes a disc-shaped base plate 31 and a base 32. The base 32 is fixedly mounted on the lower surface of the base plate 31 and is coaxially designed. The outer diameter of the base 32 is smaller than that of the annular part 24. The inner diameter of the base plate 31 is smaller than the outer diameter of the virtual cylindrical shell 11 formed by multiple limiting parts 22. The base plate 31 and the base 32 are fixed to the end face of the shell 11 by multiple screws and are designed to be coaxial with the shell 11. The bottom surface of the base plate 31 is higher than the upper surface of the fixing part 21. A through vacuum port 33 is provided at the axial position of the base plate 31 and the base 32. A through vacuum interface 6 is provided at the center of the shell 11. One end of the vacuum port 33 is connected to the vacuum interface 6. The vacuum suction cover 4 includes a disc-shaped cover plate 41. The edge of the cover plate 41 extends axially downward and is provided with a side plate 43. The cover plate 41 and the side plate 43 are fixedly mounted on the base plate 31 of the vacuum suction seat 3 by multiple screws, and a cavity is formed between them. The cover plate 41 has multiple suction holes 42. The upper surface of the cover plate 41 is lower than the upper end face of the limiting part 22. The cover plate 41 of the vacuum suction cover 4 is provided with a limiting block 5 that matches the shape of the thrust plate notch. The limiting block 5 is connected to the cover plate 41 by screws. The center of the upper surface of the cover plate 41 of the vacuum suction cover 4 is provided with a groove 44. A sealing gasket is provided between the side plate 43 and the base plate 31. The material of the claw 2 is GCr15 that has been tempered.

[0017] Its detailed connection methods are well-known technologies in this field. The following mainly introduces the working principle and process, as follows: According to the instruction manual Figure 1-3As can be seen, the high-precision pneumatic diaphragm chuck 1 of this utility model is assembled with the machine tool spindle, and a screw-fit joint mechanism is provided between the two. The high-precision pneumatic diaphragm chuck 1 includes a housing 11 and multiple movable chucks 12. Of course, a pneumatic drive system is provided inside the housing 11. By activating the drive system, the movable chucks 12 can move radially on the end face of the housing 11 simultaneously. The above is the prior art. During operation, the operator places the thrust plate on the cover plate 41, that is, between the multiple limiting parts 22. The movable chucks move radially inward at the same time, driving the fixed part 21 and the limiting part 22 to move. The deformable part 23 and the annular part 24 undergo slight deformation, resulting in elastic deformation. The limiting part 22 fixes the thrust plate. Here, excessive clamping force is not required. Ensuring that the thrust plate can be centered and limited is the most important thing. The clamping force can be controlled by controlling the moving distance of the movable chucks 12 in the high-precision pneumatic diaphragm chuck 1. Furthermore, this invention needs to consider the material of the jaw 2, which can repeatedly undergo elastic deformation within a certain range. Of course, to ensure clamping force, a metal material is generally used, and the elastic deformation should not be too large. That is, the inner diameter of the limiting part 22 should be slightly larger than the outer diameter of the thrust plate. The deformation range should allow the limiting part 22 to radially limit and clamp the thrust plate. Currently, the jaw 2 in use is GCr15 that has undergone heat treatment. After clamping by the jaw 2, axial adsorption and fixation are performed. The cavity between the vacuum suction cover 4 and the vacuum suction base 3 is connected to one end of the vacuum interface 6 at the center of the high-precision pneumatic diaphragm chuck 1 through the vacuum port 33. The other end of the vacuum interface 6 is connected to an external air compressor through a connecting pipe. A rotary joint should be considered, as this is existing technology. The external air compressor creates negative pressure in the cavity, and the thrust plate is axially adsorbed through the suction hole 42 on the cover plate 41, thus fixing the thrust plate stably without damaging it, improving the processing quality of the product.

[0018] Among them, the cover plate 41 of the vacuum suction cover 4 is provided with a limiting block 5 that matches the shape of the notch of the thrust plate. The limiting block 5 is connected to the cover plate 41 by screws. The limiting block 5 is set according to the specific situation of the thrust plate and can be detached by screws. Moreover, the limiting block 5 limits the installation of the thrust plate and improves the accuracy of subsequent clamping. On the other hand, its surface is higher than the limiting part 22 of the chuck 2, which avoids damage to the chuck 2 due to operation errors or excessive processing during the processing, and has a protective function.

[0019] The vacuum suction cap 4 has a groove 44 at the center of the upper surface of the cover plate 41. When the thrust plate is installed, the protrusion at the center of the thrust plate can be inserted into the groove 44, thereby ensuring that the end face of the thrust plate fits against the cover plate 41 and ensuring the effect of subsequent vacuum suction.

[0020] Furthermore, since this invention involves pneumatic adsorption, those skilled in the art will inevitably consider the sealing issue. For example, sealing gaskets can be provided between the side plate and the bottom plate, and sealing gaskets can be added at the screw fixing points on the bottom plate and the base to ensure the effectiveness of pneumatic adsorption.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thrust plate vacuum suction fixture, characterized in that, The system includes a high-precision pneumatic thin-film chuck (1), jaws (2), a vacuum suction seat (3), and a vacuum suction cover (4). The high-precision pneumatic thin-film chuck (1) includes a housing (11) and multiple movable chucks (12). The movable chucks (12) can move radially simultaneously on the end face of the housing (11). The jaws (2) include a number of fixed parts (21) and annular parts (24) equal to the number of movable chucks (12). The fixed parts (21) are fixedly mounted on the corresponding movable chucks (12) by screws. The multiple fixed parts (21) form a virtual annulus. The outer edge of each fixed part (21) is axially... A limiting part (22) is provided extending upwards, and multiple limiting parts (22) form a virtual cylindrical shell (11). A deformable part (23) is provided extending axially downwards from the inner edge of each fixed part (21). The width of the deformable part (23) is smaller than the width of the fixed part (21). The lower ends of multiple deformable parts (23) are fixedly connected to the upper end face of the ring part (24). The movement of multiple movable chucks (12) can drive the fixed part (21) and the limiting part (22) to move radially a certain distance, and the deformable part (23) and the ring part (24) undergo elastic deformation. The vacuum suction seat (3) includes a disc-shaped base plate ( 31) and base (32), the base (32) is fixedly set on the lower bottom surface of the base plate (31) and is coaxially designed. The outer diameter of the base (32) is smaller than the inner diameter of the annular part (24). The outer diameter of the base plate (31) is smaller than the inner diameter of the virtual cylindrical shell (11) formed by multiple limiting parts (22). The base plate (31) and base (32) are fixedly set on the end face of the shell (11) by multiple screws and are coaxially designed with the shell (11). The lower bottom surface of the base plate (31) is higher than the upper surface of the fixing part (21). A through vacuum port (3) is provided at the axial position of the base plate (31) and base (32). 3) A through vacuum interface (6) is provided at the center of the housing (11), and the vacuum port (33) is connected to one end of the vacuum interface (6). The vacuum suction cover (4) includes a disc-shaped cover plate (41). The edge of the cover plate (41) extends axially downward and is provided with a side plate (43). The cover plate (41) and the side plate (43) are fixed on the bottom plate (31) of the vacuum suction base (3) by multiple screws, and a cavity is formed between them. Multiple suction holes (42) are provided on the cover plate (41). The upper surface of the cover plate (41) is lower than the upper end face of the limiting part (22).

2. The thrust plate vacuum suction fixture according to claim 1, characterized in that, The vacuum suction cap (4) has a limiting block (5) on its cover plate (41) that matches the shape of the thrust plate notch. The limiting block (5) is connected to the cover plate (41) by screws.

3. The thrust plate vacuum suction fixture according to claim 1, characterized in that, The vacuum suction cap (4) has a groove (44) at the center of the upper surface of the cover plate (41).

4. The thrust plate vacuum suction fixture according to claim 1, characterized in that, A sealing gasket is provided between the side plate (43) and the bottom plate (31).

5. The thrust plate vacuum suction fixture according to claim 1, characterized in that, The material of the claw (2) is GCr15 that has undergone quenching and tempering treatment.

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