Stamping device for machining crankshaft of air compressor

Abstract

The utility model relates to a stamping device for machining a crankshaft of an air compressor, which relates to the technical field of part machining, is used for fixing the crankshaft, and comprises a platform, two positioning plates symmetrically and slidably arranged on the platform, two rotating shafts symmetrically and rotatably arranged on the positioning plates, and mounting blocks slidably arranged on the two rotating shafts, a driving air cylinder is mounted on the positioning plate, an upper clamping plate and a lower clamping plate are arranged on the side, away from the two rotating shafts, of the mounting block in a relatively sliding mode, the upper clamping plate and the lower clamping plate are connected with a driving mechanism, and the sides, away from each other, of the upper clamping plate and the lower clamping plate abut against two adjacent connecting plates of the crankshaft correspondingly; the minimum distance between the lower clamping plate and the upper clamping plate located on the different mounting blocks in the vertical direction is equal to the thickness of the connecting plate located in the middle of the crankshaft, and clamping assemblies are arranged on the sides, away from the rotating shaft, of the upper clamping plate and the lower clamping plate. According to the crankshaft punching device, a crankshaft can be limited during crankshaft punching, meanwhile, it is guaranteed that the crankshaft is subjected to uniform clamping force, and the situation that the crankshaft is damaged due to the fact that local stress on the crankshaft is too large during punching is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of part processing technology, in particular to a stamping device for air compressor crankshaft machining. BACKGROUND

[0002] In the prior art, when the crankshaft is machined, the workers usually punch holes at the center shaft positions of both ends of the crankshaft. The holes on the crankshaft not only serve to reduce the mass of the crankshaft and the centrifugal force generated during movement, but also play a role in lubricating the surface of the journal. These holes allow oil to be introduced or removed, thereby effectively lubricating the journal surface. In addition, in order to reduce stress concentration, a transition arc is used to connect the main journal, the crank pin and the crank arm, which helps to disperse stress and enhance the structural strength and durability of the crankshaft.

[0003] However, in the prior art, the center hole needs to be punched separately, and cannot be integrally formed during crankshaft stamping, so it needs to be punched separately after the crankshaft machining is completed. Due to the special structure of the crankshaft, it cannot be completely fixed or limited during center shaft punching, which causes difficulty in punching. In addition, since the crankshaft cannot be completely fixed, the local pressure of the crankshaft during punching is too large, which causes the overall structure of the crankshaft to be damaged. CONTENT OF THE INVENTION

[0004] In order to completely limit the crankshaft during center shaft punching on the crankshaft to avoid punching failure or structural damage of the crankshaft, the present application provides a stamping device for air compressor crankshaft machining.

[0005] The stamping device for air compressor crankshaft machining provided by the present application adopts the following technical scheme:

[0006] The stamping device for air compressor crankshaft machining is used for crankshaft fixation, comprising a platform, two positioning plates symmetrically slidingly arranged on the platform, two rotating shafts symmetrically rotatingly arranged on the positioning plates, and a mounting block slidingly arranged on the two rotating shafts, a driving cylinder for driving the mounting block is installed on the positioning plate, the mounting block is relatively slidingly arranged with an upper clamping plate and a lower clamping plate in the vertical direction away from the two rotating shafts, the upper clamping plate and the lower clamping plate are connected with a driving mechanism, the upper clamping plate and the lower clamping plate are respectively abutted on the sides of the two adjacent connecting plates of the crankshaft away from each other, the minimum distance between the lower clamping plate and the upper clamping plate on different mounting blocks in the vertical direction is equal to the thickness of the connecting plate in the middle of the crankshaft, and the upper clamping plate and the lower clamping plate are provided with a clamping assembly for clamping the eccentric shaft on the crankshaft away from the rotating shaft.

[0007] By adopting the above technical scheme, when the crankshaft is punched, the distance between the upper clamping plate and the lower clamping plate is adjusted by the driving mechanism, so that the upper clamping plate and the lower clamping plate are respectively abutted against the side of the two adjacent connecting plates of the crankshaft that are close to each other, thereby ensuring that the crankshaft is clamped and providing stable support for the crankshaft, so that the structure of the crankshaft can be ensured during the punching process. At this time, the main role of the clamping assembly is to clamp the eccentric shaft between the two adjacent connecting plates of the crankshaft, preventing the crankshaft from rotating during the punching process. The clamping assemblies on the two mounting blocks jointly act to completely limit the crankshaft in the horizontal direction. In addition, the upper clamping plate and the lower clamping plate on different mounting blocks are respectively clamped between different two connecting plates, thereby avoiding bending of the crankshaft and completely limiting the crankshaft in the vertical direction.

[0008] Optionally, the upper clamping plate and the lower clamping plate are provided with a semicircular clamping groove at the end away from the mounting block, the clamping assembly comprises a clamping ring detachably installed in the clamping groove and clamped with the eccentric shaft of the crankshaft, and two fastening screws symmetrically installed on the upper clamping plate or the lower clamping plate at positions on both sides of the clamping groove slot. The clamping ring comprises a semicircular part and two lateral plate parts symmetrically arranged on both sides of the semicircular part, the two fastening screws are respectively arranged on the two lateral plate parts, the clamping ring has several different specifications, and the radius of the inner side of the semicircular part of the clamping ring of different specifications is different.

[0009] By adopting the above technical scheme, for the crankshaft with eccentric shafts of different transverse dimensions, the operator can replace the clamping ring of different specifications to completely cooperate with the eccentric shaft on the crankshaft, avoiding transverse shaking of the crankshaft during processing, which causes errors in the processing result, and the replacement is convenient.

[0010] Optionally, a sub-slot is provided at the bottom of the clamping groove, an elastic rubber strip is fixedly installed on the outer side of the semicircular part in the circumferential direction, and the elastic rubber strip is slidingly fitted in the sub-slot. A compression spring is sleeved between the top of the fastening screw and the upper clamping plate or the lower clamping plate, and the two ends of the compression spring are respectively in abutment with the top end of the fastening screw and the lateral plate part.

[0011] By adopting the above technical scheme, since the crankshaft needs to be stress-free or balanced in the horizontal direction, the clamping ring and the elastic connection in the clamping groove can avoid excessive extrusion of the upper clamping plate and the lower clamping plate on the crankshaft, so that the crankshaft is deformed, and at the same time, the error caused by the vibration of the equipment during the punching process on the crankshaft processing can be reduced.

[0012] Optionally, the end of the driving cylinder telescopic rod is fixedly connected with a plastic force relief plate for preventing excessive instantaneous impact force on the driving cylinder telescopic rod when the crankshaft is impacted.

[0013] By adopting the technical scheme, the mounting block connected with the upper clamping plate and the lower clamping plate can be prevented from shaking in the vertical direction during the punching process, so that the punching depth error is avoided, the accuracy in the punching process is improved, and the driving cylinder is protected.

[0014] Optionally, the force relieving plate is a hard rubber plate, and a side, away from the driving cylinder, of the force relieving plate is fixedly connected with the clamping plate.

[0015] By adopting the technical scheme, the hard rubber plate not only has good plasticity and can meet the requirement of multiple uses, but also has a high cost performance, so that the practicability and economy of the whole equipment are improved.

[0016] Optionally, a reinforcing mechanism for assisting in supporting the upper clamping plate and the lower clamping plate is arranged between the upper clamping plate and the lower clamping plate on the same mounting block, the reinforcing mechanism comprises a connecting rod hinged to a side, close to the lower clamping plate, of the upper clamping plate and a slide rod hinged to an end, away from the upper clamping plate, of the connecting rod, a T-shaped groove is formed in a length direction of a side, close to the upper clamping plate, of the lower clamping plate, the slide rod is slidingly arranged in the T-shaped groove, and a locking structure for limiting the slide rod is arranged on the lower clamping plate.

[0017] By adopting the technical scheme, when the punching impact force is too large, in order to avoid the relative displacement between the upper clamping plate and the lower clamping plate and the condition that the crankshaft cannot be limited, the reinforcing structure is designed to further reinforce the distance between the upper clamping plate and the lower clamping plate, wherein when the upper clamping plate and the lower clamping plate move to the predetermined position, the slide rod in the T-shaped groove is also fixed at the predetermined position in the T-shaped groove under the action of the locking mechanism, and at this time, the connecting rod and the mounting block form a stable triangular structure to provide stable support for the upper clamping plate and the lower clamping plate.

[0018] Optionally, the lower clamping plate is symmetrically provided with two strip-shaped grooves in communication with the T-shaped groove, the locking structure comprises two fixed pins symmetrically arranged at two ends of the slide rod, a fixed rod vertically connected with one end of the fixed pin, and a sleeve arranged at the other end of the fixed rod, the two fixed pins are slidingly arranged in the two strip-shaped grooves respectively, an opening is formed in a side, close to the lower clamping plate, of the sleeve, and a stop pad is slidingly sleeved with the opening, the stop pad is connected with a micro gas cylinder for driving the stop pad to abut against the lower clamping plate, and the micro gas cylinder is fixedly installed on a side, away from the lower clamping plate, of the sleeve.

[0019] By adopting the technical scheme, when the upper clamping plate and the lower clamping plate are moved to the determined positions, the micro pneumatic cylinder is driven to abut against the lower side of the stop pad and the upper surface of the lower clamping plate, so as to limit the sliding of the sliding rod in the T-shaped groove, and a stable support structure is formed, the operation is simple, the sliding of the lower connecting rod is not affected, and the stop pad can be replaced in real time when the stop pad is excessively worn, and the overall durability of the equipment is improved.

[0020] Optionally, an inclined rod is fixedly connected between the end of the fixing rod away from the fixing pin and the fixing pin.

[0021] By adopting the technical scheme, when the impact force is too large in the punching process, the stress on the fixing rod is too concentrated, the fixing rod is broken or bent, the connecting rod cannot play a supporting role, and the overall safety of the equipment is improved.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. The present application can completely limit the crankshaft, avoid the crankshaft from shaking in the punching process, and avoid the machining result from being inaccurate;

[0024] 2. The present application can provide good support for the crankshaft, and when the instantaneous impact force on the crankshaft is too large, the present application can ensure that other positions on the crankshaft will not be bent or broken due to the sudden internal stress;

[0025] 3. The present application has high safety, and the present application can always ensure that the crankshaft is in a stable state during the crankshaft stamping process, and no accidents will occur. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic view of the overall structure of the stamping device for processing the crankshaft of the air compressor.

[0027] Figure 2 is a schematic view of the clamping structure on the positioning plate of the stamping device for processing the crankshaft of the air compressor.

[0028] Figure 3 is a structural view of the lower clamping plate of the stamping device for processing the crankshaft of the air compressor.

[0029] Figure 4 is a structural view of the clamping ring of the stamping device for processing the crankshaft of the air compressor.

[0030] Figure 5 is Figure 2 is an enlarged view of A in FIG. 6.

[0031] Figure 6It is the partial schematic view of the force relief plate connecting structure of the stamping device for air compressor crankshaft machining.

[0032] Figure 7 It is the overall structure schematic view of the mounting block and connecting structure of the stamping device for air compressor crankshaft machining.

[0033] Figure 8 It is Figure 7 The enlarged view at B in FIG. 6.

[0034] Figure 9 It is Figure 7 The cross-sectional view at A-A in FIG. 6.

[0035] Figure 10 It is the overall schematic view of the locking structure of the stamping device for air compressor crankshaft machining.

[0036] Explanation of reference numerals: 1, platform; 2, positioning plate; 21, rotating shaft; 22, driving cylinder; 221, force relief plate; 3, mounting block; 4, upper clamping plate; 41, clamping groove; 42, auxiliary groove; 5, lower clamping plate; 51, T-shaped groove; 52, strip-shaped groove; 6, driving mechanism; 61, alternating current motor; 62, bidirectional screw rod; 7, clamping assembly; 71, clamping ring; 711, half ring part; 712, horizontal plate part; 713, elastic rubber strip; 72, fastening screw; 721, compression spring; 8, reinforcing mechanism; 81, connecting rod; 82, sliding rod; 9, locking structure; 91, fixing pin; 92, fixing rod; 93, sleeve; 94, miniature cylinder; 95, stopper pad; 96, inclined rod. DETAILED DESCRIPTION

[0037] The following will be described in detail with reference to the accompanying drawings. Figures 1-10 The present application will be further described in detail.

[0038] The present application discloses a stamping device for air compressor crankshaft machining.

[0039] Reference Figure 1 The stamping device for air compressor crankshaft machining is mainly used for providing stable support for the crankshaft in the center shaft punching process on the crankshaft, so as to avoid the failure of crankshaft machining. The device specifically comprises a platform 1 placed on the machining horizontal plane, two positioning plates 2 symmetrically slidingly arranged on the platform 1 along the length direction, two rotating shafts 21 symmetrically arranged on the same positioning plate 2 and the center point connecting line of which is perpendicular to the sliding direction of the positioning plate 2, and a mounting block 3 slidingly arranged on the two rotating shafts 21. The positioning plate 2 is provided with a driving cylinder 22 for supporting and driving the mounting block 3 to slide on the rotating shaft 21.

[0040] The upper clamping plate 4 and the lower clamping plate 5 are arranged on the same mounting block 3 and slide along the height direction, and a driving mechanism 6 is arranged on the mounting block 3 and used for driving the upper clamping plate 4 and the lower clamping plate 5 to slide in opposite directions. The upper clamping plate 4 and the lower clamping plate 5 located on the same mounting block 3 are respectively abutted with the sides of the two adjacent connecting plates of the crankshaft which are close to each other, so as to provide stable vertical support for the crankshaft. The two upper clamping plates 4 and the two lower clamping plates 5 located on different mounting blocks 3 are respectively abutted with the two connecting plates of the crankshaft which are located at different positions along the axis, so as to ensure that the crankshaft can be uniformly stressed in the vertical direction and avoid vertical movement of the crankshaft when the stamping force is too large, thereby causing processing errors.

[0041] With reference to Figure 2 Specifically, the driving mechanism 6 includes an alternating current motor 61 fixedly installed on the side of the mounting block 3 away from the positioning plate 2 and a bidirectional screw rod 62 rotatably arranged on the mounting block 3 in the vertical direction. The alternating current motor 61 is in transmission connection with the end of the bidirectional screw rod 62, and the upper clamping plate 4 and the lower clamping plate 5 are respectively and symmetrically screwed on the two ends of the bidirectional screw rod 62 having opposite threads.

[0042] With reference to Figure 2 and Figure 3 The upper clamping plate 4 and the lower clamping plate 5 are respectively provided with a clamping assembly 7 for clamping the eccentric shaft of the crankshaft in the transverse direction on the side away from the rotating shaft 21. The upper clamping plate 4 and the lower clamping plate 5 are respectively provided with a semicircular clamping groove 41 penetratingly arranged on the end away from the mounting block 3 and in communication with the side surface, and the clamping assembly 7 includes a clamping ring 71 detachably installed in the clamping groove 41 and abutting with the eccentric shaft of the crankshaft on the inner side, and a fastening screw 72 symmetrically arranged on the two sides of the clamping ring 71 and in threaded connection with the upper clamping plate 4 or the lower clamping plate 5. The clamping ring 71 has several different specifications to ensure the size cooperation with the eccentric shaft of the crankshaft of different specifications and improve the applicability of the device.

[0043] With reference to Figure 4 Specifically, the clamping ring 71 includes a semicircular portion 711 and two transverse plate portions 712 symmetrically arranged on the two ends of the semicircular portion 711. The two fastening screws 72 are respectively arranged on the two transverse plate portions 712 to integrally fix the clamping ring 71 on the upper clamping plate 4 or the lower clamping plate 5. The radius of the semicircular portion 711 of the clamping ring 71 of different specifications increases in sequence, and when different crankshafts are processed, the clamping ring 71 can be replaced to ensure that the semicircular portion 711 is always completely matched with the eccentric shaft of the crankshaft.

[0044] The four clamping rings 71 located on different mounting blocks 3 jointly clamp and completely position the crankshaft, so as to prevent the crankshaft from moving transversely when the stress is uneven and cause processing failure.

[0045] With reference to Figure 4 and Figure 5Further, the bottom of the card slot 41 is provided with an arc-shaped auxiliary slot 42, the outer side of the half-ring part 711 is fixedly connected with an elastic rubber strip 713 which is slidably matched with the auxiliary slot 42, and the tightening screw 72 is sleeved with a compression spring 721. The compression spring 721 and the elastic rubber strip 713 jointly act to avoid that the upper clamping plate 4 and the lower clamping plate 5 excessively press the crankshaft, thereby causing the deformation of the crankshaft.

[0046] Referring to Figure 6 The telescopic rod end of the driving cylinder 22 is connected with a plastic force relief plate 221, and the force relief plate 221 is fixedly connected with the mounting block 3, so that the cylinder is not damaged when the crankshaft is subjected to an instantaneous impact force, and the safety of the whole device during operation is improved.

[0047] Preferably, the material of the force relief plate 221 is a hard rubber plate, because the hard rubber plate can slowly recover the shape after deformation, and is convenient for multiple uses. At the same time, the hard rubber plate has low cost, and improves the economic practicality of the whole device.

[0048] Referring to Figure 7 The upper clamping plate 4 and the lower clamping plate 5 on the same mounting block 3 are provided with a reinforcing mechanism 8 for auxiliary support, so that the distance between the upper clamping plate 4 and the lower clamping plate 5 is not changed when the crankshaft is subjected to an instantaneous impact force during the operation of the device, and the crankshaft cannot be limited and supported.

[0049] Referring to Figure 8 and Figure 9 The reinforcing mechanism 8 includes a connecting rod 81 hinged to one side of the upper clamping plate 4 close to the lower clamping plate 5, and a sliding rod 82 hinged to one end of the connecting rod 81 away from the upper clamping plate 4. The lower clamping plate 5 is provided with a T-shaped slot 51 along the length direction, and the sliding rod 82 is slidably connected in the T-shaped slot 51. Further, the lower clamping plate 5 is provided with a locking structure 9 for limiting the sliding rod 82, so that the position of the sliding rod 82 can be adjusted in real time.

[0050] Referring to Figure 8 and Figure 10 Specifically, the lower clamping plate 5 is provided with a strip-shaped slot 52 which is symmetrically arranged on both sides of the T-shaped slot 51 and is communicated with the T-shaped slot 51. The locking structure 9 includes two fixed pins 91 which are symmetrically and detachably installed on both ends of the sliding rod 82, one end of the fixed pin 91 penetrates out of the strip-shaped slot 52, and is perpendicularly connected with a fixed rod 92. One end of the fixed rod 92 away from the fixed pin 91 is integrally connected with a sleeve 93, and the sleeve 93 is slidably provided with a stop pad 95 which is abutted against the lower clamping plate 5. The stop pad 95 is connected with a micro cylinder 94 fixedly installed at the top end of the sleeve 93, and is used to drive the stop pad 95 to stop the sliding rod 82.

[0051] Preferably, a slope rod 96 is connected between one end of the fixed rod 92 away from the fixed pin 91 and the fixed pin 91, so as to reinforce the structure of the fixed rod 92 and prevent the fixed rod 92 from being bent.

[0052] The implementation principle of the stamping device for air compressor crankshaft machining according to the embodiments of the present application is as follows:

[0053] Firstly, the two positioning plates 2 and the two mounting blocks 3 are moved so that the upper clamping plates 4 on the two mounting blocks 3 and the clamping rings 71 on the lower clamping plates 5 are all in contact with the eccentric shafts on the crankshaft. The upper clamping plates 4 and the lower clamping plates 5 on different mounting blocks 3 jointly act on the crankshaft to completely limit the crankshaft in the horizontal direction.

[0054] Then, the upper clamping plates 4 and the lower clamping plates 5 on the two mounting blocks 3 jointly abut against the connecting plates on the crankshaft to limit the crankshaft in the vertical direction. In this process, when the AC motor 61 drives the upper clamping plates 4 and the lower clamping plates 5 to move to the position abutting against the two adjacent connecting plates, the slide rod 82 will also move to the predetermined position in the T-shaped groove 51 under the drive of the upper clamping plates 4 and the lower clamping plates 5. At this time, the micro air cylinder 94 drives the stop pad 95 to move downward and abut against the lower clamping plate 5 to limit the slide rod 82.

[0055] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A punching device for air compressor crankshaft machining for crankshaft fixation, characterized in that: The utility model provides a kind of crankshaft positioning device, including platform (1), two positioning plates (2) being symmetrically slidably arranged on the platform (1), two rotating shafts (21) being symmetrically arranged on the positioning plate (2) and mounting block (3) being slidably arranged on two rotating shafts (21), driving cylinder (22) for driving mounting block (3) is mounted on the positioning plate (2), upper clamping plate (4) and lower clamping plate (5) are relatively slidably arranged in vertical direction on the side of mounting block (3) away from two rotating shafts (21), driving mechanism (6) is connected to the upper clamping plate (4) and the lower clamping plate (5), the side of the upper clamping plate (4) and the lower clamping plate (5) away from each other is respectively abutted with the side of two adjacent connecting plates of crankshaft approaching each other, the minimum distance between the lower clamping plate (5) and the upper clamping plate (4) located on different mounting block (3) along vertical direction is equal to the thickness of connecting plate in the middle of crankshaft, the side of the upper clamping plate (4) and the lower clamping plate (5) away from rotating shaft (21) is provided with clamping assembly (7) for clamping eccentric shaft on crankshaft.

2. The punch device for air compressor crankshaft machining according to claim 1, characterized in that: The side of the upper clamping plate (4) and the lower clamping plate (5) away from mounting block (3) is provided with half-ring type clamping groove (41), the clamping assembly (7) includes clamping ring (71) detachably mounted in the clamping groove (41) and clamped with eccentric shaft of crankshaft on the inner side and two fastening screws (72) symmetrically mounted on the upper clamping plate (4) or the lower clamping plate (5) at the position of the slot opening of the clamping groove (41) on both sides, the clamping ring (71) includes half-ring part (711) and transverse plate part (712) symmetrically arranged on both sides of the half-ring part (711), two fastening screws (72) are respectively arranged on two transverse plate parts (712), the clamping ring (71) has several different specifications, and the radius of the inner side of the half-ring part (711) of the clamping ring (71) of different specifications is different.

3. The punch device for air compressor crankshaft machining according to claim 2, characterized in that: The bottom of the clamping groove (41) is provided with a sub-slot (42), the outer side of the half-ring part (711) is fixedly installed with an elastic rubber strip (713) along the circumference, and the elastic rubber strip (713) is slidably fitted in the sub-slot (42), the fastening screw (72) is sleeved with a compression spring (721) between the top and the upper clamping plate (4) or the lower clamping plate (5), and the two ends of the compression spring (721) are respectively abutted with the top end of the fastening screw (72) and the transverse plate part (712).

4. The punch device for air compressor crankshaft machining according to claim 3, characterized in that: The end of the telescopic rod of the driving cylinder (22) is fixedly connected with the plastic force relief plate (221) for preventing the instantaneous impact force caused by the impact on the crankshaft from being too large on the telescopic rod of the driving cylinder (22).

5. The punch device for air compressor crankshaft machining according to claim 4, characterized in that: The force relief plate (221) is a hard rubber plate, and the side of the force relief plate (221) away from the driving cylinder (22) is fixedly connected with the clamping plate.

6. The punch device for air compressor crankshaft machining according to claim 5, characterized in that: The upper clamping plate (4) and the lower clamping plate (5) located on the same mounting block (3) are provided with a reinforcing mechanism (8) for assisting in supporting the upper clamping plate (4) and the lower clamping plate (5), the reinforcing mechanism (8) comprises a connecting rod (81) hinged to one side of the upper clamping plate (4) close to the lower clamping plate (5) and a sliding rod (82) hinged to one end of the connecting rod (81) away from the upper clamping plate (4), and the lower clamping plate (5) is provided with a T-shaped slot (51) on one side close to the upper clamping plate (4) along the length direction, and the sliding rod (82) is slidingly arranged in the T-shaped slot (51), and the lower clamping plate (5) is provided with a locking structure (9) for limiting the sliding rod (82).

7. The punch device for air compressor crankshaft machining according to claim 6, characterized in that: The lower clamping plate (5) is symmetrically provided with two strip-shaped slots (52) communicated with the T-shaped slot (51), the locking structure (9) comprises two fixed pins (91) symmetrically arranged at both ends of the sliding rod (82), a fixed rod (92) vertically connected at one end of the fixed pin (91), and a sleeve (93) arranged at the other end of the fixed rod (92), the two fixed pins (91) are slidingly arranged in the two strip-shaped slots (52) respectively, the sleeve (93) is provided with an opening close to one side of the lower clamping plate (5) and slidingly sleeved with a stop pad (95), the stop pad (95) is connected with a micro air cylinder (94) for driving the stop pad (95) to abut against the lower clamping plate (5), and the micro air cylinder (94) is fixedly installed on the side of the sleeve (93) away from the lower clamping plate (5).

8. The punch device for air compressor crankshaft machining according to claim 7, characterized in that: The end of the fixed rod (92) away from the fixed pin (91) is fixedly connected with a slope rod (96) between the fixed pin (91).

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