Punching device for air spring production

Abstract

The present invention relates to the technical field of punching and fixing devices, and specifically discloses a punching device for air spring production, comprising an operating table, a punching mechanism, a fixing seat arranged on the operating table, and a fixing mechanism arranged in the fixing seat, wherein the fixing mechanism comprises an inner support component and at least two groups of outer support components, a workpiece is coaxially sleeved on the outer side of the inner support component, and each outer support component is arranged on the outer side of the workpiece, the outer support component comprises an outer support member, a movable member 1 and a movable member 2, one end of the movable member 1 is hinged to the lower end of the outer support member, the other end of the movable member 1 is movably connected to the fixing seat, one end of the movable member 2 is hinged to the upper end of the outer support member and longitudinally slides together, the other end of the movable member 2 is movably connected to the fixing seat, the movable member 1 and the movable member 2 push the outer support member to fit the outer wall of the workpiece from bottom to top, the inner support component comprises an adjusting structure and an inner support member, the adjusting structure adjusts the inner support member to rotate to fit the lower end face of the workpiece at the punching position, and the punching device of the present invention improves the punching accuracy of the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of punching and fixing devices, and in particular to a punching device used for producing air springs. Background Art

[0002] During the manufacturing process of air springs, in order to facilitate the connection of other components and the installation of sensors, inflation nozzles and other components on the air springs, it is necessary to punch holes in the air springs. In order to ensure the efficiency and accuracy of the air spring punching, the related technology usually uses automated punching equipment to perform the punching.

[0003] The patent document with the authorization announcement number CN216682518U discloses an air spring bladder forming and punching device, including an operating table, a mounting mechanism is arranged on the top of the operating table, the mounting mechanism adopts an L-shaped structure, the horizontal end of which is arranged on the operating table, and a servo motor and a rotating shaft are arranged on the inner side of the vertical end, and the servo motor is connected to the transmission shaft through a belt drive; a mounting plate is arranged on the inner side of the top of the vertical end of the mounting mechanism, and a front upper cylinder and a rear upper cylinder are arranged on the top of the mounting plate, a double-row needle fixing plate is arranged at the lower end of the front upper cylinder, a double-row needle is arranged at the bottom of the double-row needle fixing plate, and a roller fixing plate is arranged at the lower end of the rear upper cylinder, and two rollers are arranged on the side of the roller fixing plate close to the double-row needle fixing plate; when the punching device provided by the patent document fixes the air bag to be punched, the air bag is firstly sleeved on the outer side of the rotating shaft, and the air bag is abutted against the adjustment and positioning shaft, and then the roller is pushed down by the cylinder to press the air bag to avoid the swing of the air bag during the punching process.

[0004] The holes on the air spring for connecting other components and for installing the inflation nozzle, sensor and other components are usually opened at the top or bottom of the air spring. The punching equipment provided in the above patent document is not convenient for punching holes at the top or bottom of the air spring.

[0005] In addition, when the punching equipment punches a hole at the top or bottom of the air spring, the punching needle moves down to punch a hole at the specified position of the air spring. The pressure generated by the punching needle on the punching position of the air spring will also cause the air spring to deform to a certain extent, thereby affecting its punching accuracy. The punching accuracy of the air spring directly affects the performance and reliability of the air spring. The punching accuracy will also directly affect the sealing between the components installed in the hole (such as the inflation nozzle, sensor, etc.) and the air spring. If the punching accuracy is not enough, it may result in poor sealing, causing air leakage, and affecting the balance and stability of the air spring. Summary of the invention

[0006] The present invention provides a punching device for air spring production, aiming to solve the problem that when the punching equipment in the related art punches holes in the air spring, the punching accuracy is not ideal due to the influence of the material properties of the air spring itself.

[0007] The punching device for air spring production of the present invention comprises an operating table and a punching mechanism, wherein the punching mechanism is mounted on the operating table and used for punching holes in a workpiece, and a fixing seat is also provided on the operating table, wherein a fixing mechanism is provided inside the fixing seat, wherein the fixing mechanism comprises an inner support assembly and at least two groups of outer support assemblies, wherein the workpiece is sleeved on the outer side of the inner support assembly, wherein each of the outer support assemblies is evenly circumferentially arranged around the axial direction of the inner support assembly, and each of the outer support assemblies is arranged on the outer side of the workpiece;

[0008] The outer support assembly comprises an outer support member, a movable member 1 and a movable member 2, one end of the movable member 1 is hinged to the lower end of the outer support member, the other end of the movable member 1 is movably connected to the fixed seat, one end of the movable member 2 is hinged to the upper end of the outer support member and longitudinally slidably cooperates, the other end of the movable member 2 is movably connected to the fixed seat, and the movable member 1 and the movable member 2 push the outer support member to fit the outer wall of the workpiece from bottom to top;

[0009] The inner support assembly comprises an adjustment structure and an inner support member, wherein the adjustment structure adjusts the inner support member to rotate to a horizontal state and fit with the lower end surface of the workpiece punching position.

[0010] The beneficial effects are: improving the accuracy of air spring drilling, ensuring the processing quality of the air spring, the inner support component cooperates with the outer support component to clamp and fix the workpiece, ensuring the stability of the workpiece fixed position, and when drilling the workpiece, the inner support component fits the workpiece inside the workpiece and is longitudinally opposite to the position to be punched on the workpiece. The inner support component is used to provide support for the workpiece when drilling the workpiece, reducing the deformation of the workpiece during the drilling process. In addition, the outer support component squeezes the workpiece from bottom to top, which can overcome the deformation of the workpiece caused by gravity in its axial direction, so as to reduce the squeezing effect of the inner support component on the workpiece when supporting the workpiece, and reduce the deformation of the workpiece at the drilling location.

[0011] Preferably, the adjustment structure includes an adjustment shaft, an adjustment rod and an adjustment block, one end of the inner support member is hinged to the adjustment shaft, the other end of the inner support member is hinged to the adjustment rod, the adjustment rod is hinged to the adjustment block, and the adjustment block is sleeved on the adjustment shaft and longitudinally slidably cooperates with the adjustment shaft.

[0012] Preferably, the inner support member is provided with a support portion, the upper end surface of the support portion is provided with an annular positioning groove, the upper end surface of the support portion is in contact with the workpiece when the inner support member is in a horizontal state, and the positioning groove is opposite to the position of the hole to be punched on the workpiece.

[0013] The beneficial effect is that the adjustment structure can avoid the influence of the inner support on the lowering operation of the workpiece by adjusting the inner support. In addition, the positioning groove provided on the support part makes it easier for the punching mechanism to punch holes in the workpiece smoothly.

[0014] Preferably, the punching mechanism includes a mounting seat, a cutting piece and a positioning assembly, the positioning assembly includes a positioning block and a positioning ring, the positioning block is circular, the positioning ring is annular, the positioning ring is located outside the positioning block and is coaxially arranged with the positioning block, an annular gap opposite to the positioning groove is formed between the positioning ring and the positioning block, the cutting piece is longitudinally slidably matched with the mounting seat, and is longitudinally opposite to the gap between the positioning block and the positioning ring.

[0015] Preferably, the positioning assembly further comprises a connecting block, the connecting block is lifted and lowered in coordination with the mounting seat, and the positioning block and the positioning ring are both elastically connected to the connecting block.

[0016] The beneficial effects are: the punching mechanism cooperates with the internal support member, and when punching a hole in the workpiece, the positioning block and the positioning ring fit against the upper side of the workpiece, and the internal support member fits against the lower side of the workpiece. By simultaneously fixing the upper and lower end faces of the workpiece at the punching position, the pulling and deformation of the workpiece during the punching operation can be further reduced, thereby ensuring the punching accuracy of the workpiece.

[0017] Preferably, the external support assembly also includes a supporting structure, which includes a connecting member and a fixing member, the connecting member is longitudinally slidably matched with the external support member, the fixing member is slidably matched with the connecting member, and the sliding direction of the fixing member is perpendicular to the sliding direction of the connecting member.

[0018] The beneficial effects are: improving the fixing effect of the central concave workpiece, and facilitating the adjustment of the height of the fixing part relative to the outer support part according to different types of workpieces to meet the clamping and fixing operations of different workpieces, thereby improving the versatility of the punching device.

[0019] Preferably, the outer support member is further provided with an adjusting member, and the adjusting member is threadably matched with the connecting member.

[0020] The beneficial effect is that the position of the connecting piece can be adjusted flexibly and quickly, the adjusting piece is threadedly matched with the connecting piece, and the relative position of the connecting piece and the outer support piece can be adjusted by rotating the adjusting piece.

[0021] Preferably, the fixing piece is provided with a fixing portion in a direction facing the workpiece, and the fixing portion is adapted to be arc-shaped at a recessed portion of the workpiece.

[0022] Preferably, a movable bracket is rotatably connected to the operating table, and the punching mechanism is slidably matched with the movable bracket.

[0023] The beneficial effects of the present invention are:

[0024] (1) Improve the accuracy of air spring drilling and ensure the processing quality of air spring. The inner support component cooperates with the outer support component to clamp and fix the workpiece to ensure the stability of the workpiece fixed position. When drilling the workpiece, the inner support component fits the workpiece inside the workpiece and is longitudinally opposite to the position to be drilled on the workpiece. The inner support component is used to provide support for the workpiece when drilling the workpiece to reduce the deformation of the workpiece during the drilling process. In addition, the outer support component squeezes the workpiece from bottom to top, which can overcome the deformation of the workpiece caused by gravity in its axial direction, so as to reduce the squeezing effect of the inner support component on the workpiece when supporting the workpiece.

[0025] (2) The adjustment structure can adjust the inner support to avoid the inner support affecting the lowering operation of the workpiece. In addition, the positioning groove provided on the support portion facilitates the punching mechanism to punch holes in the workpiece smoothly. The punching mechanism cooperates with the inner support. When punching holes in the workpiece, the positioning block and the positioning ring fit against the upper side of the workpiece, and the inner support fits against the lower side of the workpiece. By fixing the upper and lower end faces of the workpiece at the punching position at the same time, the pulling and deformation of the workpiece during the punching operation are further reduced, thereby ensuring the punching accuracy of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a schematic structural diagram of the outer support assembly of the present invention when fixing the workpiece from bottom to top.

[0028] Figure 3 It is a structural schematic diagram of the outer support assembly and the inner support assembly in the present invention to complete the fixation of the workpiece.

[0029] Figure 4 yes Figure 3 Enlarged view of part A.

[0030] Figure 5 It is a structural schematic diagram of the outer support assembly in the present invention.

[0031] Figure 6 It is a structural schematic diagram of the punching mechanism in the present invention.

[0032] Reference numerals:

[0033] 1. Operating table; 11. Movable bracket; 12. Fixed seat; 2. Adjusting shaft; 21. Inner support member; 211. Support part; 212. Positioning groove; 22. Adjusting rod; 23. Adjusting block; 24. Guide rod; 25. Ring member; 3. Outer support member; 31. Movable member 1; 32. Movable member 2; 33. Connecting member; 34. Fixed member; 341. Adjusting screw; 35. Adjusting member; 4. Mounting seat; 41. Connecting block; 42. Positioning block; 43. Positioning ring; 5. Workpiece. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] like Figures 1 to 3 As shown, the punching device for air spring production of the present invention includes an operating table 1, a punching mechanism and a fixing mechanism. A fixing seat 12 and a movable bracket 11 are provided on the operating table 1. The fixing mechanism is installed in the fixing seat 12. The movable bracket 11 is rotatably matched with the operating table 1. The movable bracket 11 is "L" shaped. The punching mechanism includes a mounting seat 4 and a cutting piece. The mounting seat 4 is slidably matched with the movable bracket 11. The cutting piece is longitudinally slidably arranged relative to the mounting seat 4, so that the punching position of the cutting piece can be adjusted according to the punching position of the workpiece 5, so that the cutting piece is opposite to the punching position on the workpiece 5.

[0036] The fixing mechanism includes an inner support assembly and at least two groups of outer support assemblies. The workpiece 5 is sleeved on the outside of the inner support assembly. The outer support assembly supports and fixes the workpiece 5 on the outside of the workpiece 5. The inner support assembly supports the position of the workpiece 5 to be punched on the inside of the workpiece 5. The inner support assembly includes an adjustment structure and an inner support member 21. The number of the inner support members 21 is consistent with the number of holes to be punched. In this embodiment, there are two inner support members 21. When punching holes in the workpiece 5, the inner support member 21 fits with the workpiece 5 inside the workpiece 5 and is longitudinally opposite to the position of the hole to be punched on the workpiece 5. The inner support member 21 is used to provide support for the workpiece 5 when the cutting member punches holes in the workpiece 5, reduce deformation of the workpiece 5 during the punching process, and ensure the punching accuracy. In order to allow the workpiece 5 to be smoothly mounted on the outside of the inner support assembly and avoid the inner support member 21 affecting the placement of the workpiece 5, the inner support member 21 is adjusted through the adjustment structure to adjust the two inner support members 21 to be relatively close when the workpiece 5 is placed so that the workpiece 5 can be lowered smoothly. After the workpiece 5 is placed in place, the two inner support members 21 are adjusted again to restore the horizontal state to support the workpiece 5.

[0037] like Figure 2 and Figure 3As shown, the adjustment structure includes an adjustment shaft 2, an adjustment rod 22 and an adjustment block 23. The adjustment shaft 2 is longitudinally arranged, one end of the inner support member 21 is hinged to the adjustment shaft 2, the other end of the inner support member 21 is hinged to the adjustment rod 22, the adjustment rod 22 is hinged to the adjustment block 23, the adjustment block 23 is sleeved on the adjustment shaft 2, and the relative fixed position of the adjustment block 23 and the adjustment shaft 2 can be adjusted. When the adjustment block 23 moves downward relative to the adjustment shaft 2, the inner support member 21 is pulled to rotate in the direction close to the adjustment shaft 2 through the adjustment rod 22, and the inner support member 21 is closed toward the adjustment shaft 2, so that the workpiece 5 can be smoothly sleeved on the outside of the inner support assembly. When the adjustment block 23 moves upward relative to the adjustment shaft 2, the adjustment block 23 pushes the inner support member 21 to rotate in the direction away from the adjustment shaft 2 through the adjustment rod 22. After the upper end surface of the inner support member 21 is in a horizontal state, the adjustment block 23 stops moving.

[0038] The assembly position of the adjusting block 23 relative to the adjusting shaft 2 can be adjusted by threaded cooperation. Specifically, an external thread can be provided on the adjusting shaft 2, and the adjusting block 23 is threadedly cooperated with the adjusting shaft 2. A guide rod 24 is fixed to the lower end of the adjusting block 23, and the guide rod 24 is longitudinally slidably cooperated with the operating table 1. A driving motor is also provided in the operating table 1, and the driving end of the driving motor is connected to the lower end of the adjusting shaft 2. The driving motor is used to drive the adjusting shaft 2 to rotate. By controlling the driving direction of the driving motor, the relative assembly position of the adjusting block 23 and the adjusting shaft 2 can be adjusted. In other operating modes, the adjusting block 23 can also be directly slidably sleeved on the adjusting shaft 2. The adjusting block 23 is connected to the operating table 1 through a cylinder. The protruding end of the cylinder is fixed to the lower end face of the adjusting block 23. The position of the adjusting block 23 can be adjusted by controlling the extension and retraction of the protruding end of the cylinder.

[0039] like Figure 3 , Figure 4 and Figure 6 As shown, the inner support member 21 is provided with a support portion 211, and the support portion 211 is used to be opposite to the position of the workpiece 5 to be punched. The upper end surface of the support portion 211 is also provided with an annular positioning groove 212. When the inner support member 21 is in a horizontal state, the upper end surface of the support portion 211 is in contact with the inner wall of the top of the workpiece 5, and the positioning groove 212 is opposite to the position of the workpiece 5 to be punched;

[0040] The punching mechanism also includes a positioning assembly, which includes a positioning block 42 and a positioning ring 43. The positioning block 42 is circular, and the positioning ring 43 is annular. The positioning ring 43 is located outside the positioning block 42, and the positioning ring 43 is coaxially arranged with the positioning block 42. An annular gap opposite to the positioning groove 212 is formed between the positioning ring 43 and the positioning block 42. The cutting piece is longitudinally slidably matched with the mounting seat 4, and is longitudinally opposite to the annular gap between the positioning block 42 and the positioning ring 43. The positioning assembly is lifted and lowered in coordination with the mounting seat 4, and the positioning assembly can be longitudinally moved by starting the cylinder. The positioning assembly also includes a connecting block 41. The cylinder drives the connecting block 41 to move longitudinally, and the positioning ring 43 and the positioning block 42 are elastically connected to the connecting block 41. When punching the workpiece 5, the positioning assembly moves downward until the positioning block 42 and the positioning ring 43 abut against the upper end surface of the top of the workpiece 5. Then the cutting piece moves downward and cuts the annular gap between the positioning block 42 and the positioning ring 43 to complete the punching operation on the workpiece 5. The positioning assembly and the support part 211 simultaneously abut against the upper and lower end surfaces of the workpiece 5 to be punched, which can effectively reduce the extrusion and pulling of the workpiece 5 caused during the punching process and ensure the accuracy of the punching of the workpiece 5.

[0041] like Figure 2 , Figure 3 and Figure 5 As shown, different models of workpieces 5 may have different heights. In other embodiments, in order to facilitate drilling of workpieces 5 of different heights, the relative fixed position of the inner support member 21 and the adjusting shaft 2 in the axial direction can be adjusted, and the supporting height of the inner support member 21 can be adjusted so that the inner support member 21 is opposite to the workpieces 5 of different heights. The inner support member 21 can be connected to the adjusting shaft 2 through an annular member 25, and the annular member 25 is movably mounted on the adjusting shaft 2. The annular member 25 can be fixed to the adjusting shaft 2 by fastening screws, and the inner support member 21 and the annular member 25 are hinged.

[0042] The workpieces 5 produced in the same batch have the same model, and the relative fixed positions of the inner support member 21 and the adjustment shaft 2 can be preset directly according to the height of the workpiece 5. Because the material of the workpiece 5 itself is more susceptible to deformation and is affected by its own material characteristics, when the workpiece 5 is naturally placed, it will produce a certain degree of radial deformation under the action of its own gravity, that is, the workpiece 5 will deform in a direction perpendicular to its central axis, which will lead to a difference between the preset support height of the inner support member 21 and the actual support height of the workpiece 5. When the inner support member 21 contacts the workpiece 5, the position to be punched on the workpiece 5 is squeezed, and the actual punching position deviates from the preset punching position.

[0043] To solve the above problem, after the workpiece 5 is placed, it is necessary to fix it on the outside of the workpiece 5 through an external support assembly, and at the same time, a certain clamping force needs to be applied to the workpiece 5 to stretch the workpiece 5 in its axial direction to eliminate the influence of gravity deformation of the workpiece 5 on its drilling accuracy.

[0044] There are at least two groups of outer support components, and each group of outer support components is evenly circumferentially arranged around the axial direction of the inner support component. In order to ensure the fixing effect of the outer support component on the workpiece 5, three or four groups of outer support components are preferably arranged. The outer support component includes an outer support member 3, a movable member 31 and a movable member 32. The outer support member 3 is in the shape of an arc plate. One end of the movable member 31 is hinged to the lower end of the outer support member 3, and the other end of the movable member 31 is movably connected to the fixed seat 12. One end of the movable member 32 is hinged to the upper end of the outer support member 3 and longitudinally slides with the outer support member 3. The other end of the movable member 32 is movably connected to the fixed seat 12. The movable member 31 and the movable member 32 are used to push the outer support member 3 to fit the outer wall of the workpiece 5 and apply pressure to the workpiece 5 so that the workpiece 5 is stretched in its axial direction. The movable member 31 and the movable member 32 can be cylinders. By controlling the extension amount of the movable member 31 and the movable member 32, the requirement of pushing the outer support member 3 to move is achieved.

[0045] The friction between the rubber workpiece 5 and the outer support member 3 is relatively large. Directly pushing the outer support member 3 close to and squeezing the workpiece 5 may prevent the workpiece 5 from being stretched smoothly in the axial direction under the action of the friction force, affecting the positioning accuracy of the workpiece 5. In order to reduce the influence of the friction force on it, when the outer support assembly clamps and fixes the workpiece 5, the movable member 1 31 first pushes the lower side of the outer support member 3 to move in the direction close to the workpiece 5, so that the lower end of the outer support member 3 contacts and gradually squeezes the workpiece 5 from bottom to top, avoiding affecting the axial stretching of the workpiece 5. After the movable member 1 31 pushes the lower end of the outer support member 3 to move into place, the movable member 2 32 slowly pushes the outer support member 3 close to the workpiece 5 until the outer support member 3 is in a vertical state. After the workpiece 5 is placed on the fixed seat 12, its lower end is affected by gravity, and the deformation amount generated in the radial direction is the largest. The movable member 1 31 and the movable member 2 32 push the outer support member 3 from bottom to top to push the outer support member 3 to fit and squeeze the workpiece 5, which can effectively reduce the influence of the gravity deformation of the workpiece 5 on the punching accuracy of the workpiece 5.

[0046] Some workpieces 5 are concave in the middle. In order to improve the fixing effect of the workpiece 5 with a concave middle part, a supporting structure is further provided on the outer support assembly. The supporting structure includes a connecting member 33 and a fixing member 34. The connecting member 33 is longitudinally slidably matched with the outer support member 3, and the fixing member 34 is slidably matched with the connecting member 33. The sliding direction of the fixing member 34 is perpendicular to the sliding direction of the connecting member 33. The fixing member 34 can be connected to the connecting member 33 by adjusting the screw 341. By rotating the adjusting screw 341, the fixing member 34 can be relatively adjusted. The connecting member 33 slides until the fixing member 34 abuts against the recessed portion of the workpiece 5. An adjusting member 35 is also provided on the outer support member 3. The adjusting member 35 is threadedly matched with the connecting member 33. By rotating the adjusting member 35, the relative position of the connecting member 33 and the outer support member 3 can be adjusted so as to adjust the fixing member 34 relative to the recessed portions of workpieces 5 of different models. To ensure the supporting effect of the fixing member 34 on the recessed position of the workpiece 5, the fixing member 34 is provided with a fixing portion facing the direction of the workpiece 5, and the fixing portion is adapted to the recessed portion of the workpiece 5 in an arc shape.

[0047] The punching device for air spring production provided by the present invention fixes the workpiece by cooperating with the inner support component and the outer support component, thereby reducing the extrusion and deformation of the workpiece during the punching process, ensuring the punching accuracy of the workpiece, and improving the processing quality of the workpiece.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A punching device for air spring production, comprising an operating table and a punching mechanism, wherein the punching mechanism is mounted on the operating table and is used to punch holes in a workpiece, and is characterized in that: The operating table is also provided with a fixed seat, in which a fixing mechanism is provided, the fixing mechanism includes an inner support assembly and at least two sets of outer support assemblies, the workpiece is sleeved on the outer side of the inner support assembly, each outer support assembly is evenly circumferentially arranged around the axial direction of the inner support assembly, and each outer support assembly is arranged on the outer side of the workpiece; The outer support assembly comprises an outer support member, a movable member 1 and a movable member 2, one end of the movable member 1 is hinged to the lower end of the outer support member, the other end of the movable member 1 is movably connected to the fixed seat, one end of the movable member 2 is hinged to the upper end of the outer support member and longitudinally slides together, the other end of the movable member 2 is movably connected to the fixed seat, the movable member 1 and the movable member 2 push the outer support member to fit with the outer wall of the workpiece from bottom to top, so that the lower end of the outer support member contacts and gradually squeezes the workpiece from bottom to top; The outer support assembly also includes a support structure, which includes a connecting piece and a fixing piece. The connecting piece and the outer support piece are longitudinally slidably matched, and the fixing piece and the connecting piece are slidably matched. The sliding direction of the fixing piece is perpendicular to the sliding direction of the connecting piece. The fixing piece is provided with an arc-shaped fixing portion in the direction toward the workpiece, and the shape of the fixing portion is adapted to the concave part of the workpiece. The inner support assembly comprises an adjusting structure and an inner support member. The adjusting structure adjusts the inner support member to rotate to a horizontal state and fit with the lower end surface of the workpiece punching position.

2. The punching device for air spring production according to claim 1, characterized in that: The adjustment structure includes an adjustment shaft, an adjustment rod and an adjustment block. One end of the inner support is hinged to the adjustment shaft, the other end of the inner support is hinged to the adjustment rod, the adjustment rod is hinged to the adjustment block, and the adjustment block is sleeved on the adjustment shaft and longitudinally slides with the adjustment shaft.

3. The punching device for air spring production according to claim 2, characterized in that: The inner support member is provided with a support portion, and the upper end surface of the support portion is provided with an annular positioning groove. When the inner support member is in a horizontal state, the upper end surface of the support portion fits the workpiece, and the positioning groove is opposite to the position to be punched on the workpiece.

4. The punching device for air spring production according to claim 3, characterized in that: The punching mechanism includes a mounting seat, a cutting piece and a positioning assembly. The positioning assembly includes a positioning block and a positioning ring. The positioning block is circular and the positioning ring is annular. The positioning ring is located outside the positioning block and is coaxially arranged with the positioning block. An annular gap opposite to the positioning groove is formed between the positioning ring and the positioning block. The cutting piece is longitudinally slidably matched with the mounting seat and is longitudinally opposite to the gap between the positioning block and the positioning ring.

5. The punching device for air spring production according to claim 4, characterized in that: The positioning assembly also includes a connecting block, which is lifted and lowered with the mounting seat, and the positioning block and the positioning ring are elastically connected to the connecting block.

6. The punching device for air spring production according to claim 1, characterized in that: The outer support piece is also provided with an adjusting piece, which is threadably matched with the connecting piece.

7. The punching device for air spring production according to claim 1, characterized in that: The operating table is also rotatably connected with a movable bracket, and the punching mechanism is slidably matched with the movable bracket.

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