A shearing machine for processing automotive parts

Abstract

This invention relates to the field of automotive metal parts processing equipment technology, and provides a shearing machine for automotive parts processing, including a worktable, a lower blade, and an upper blade. The worktable has a feeding unit on its infeed side for feeding sheet metal. The lower blade slides along the sheet metal conveying direction on the worktable to support the sheet metal fed by the feeding unit. The upper blade lifting frame is located above the worktable, and when the upper blade rises, it forms a shearing gap with the lower blade for the sheet metal to pass through. A horizontally extending groove is formed on the infeed side of the upper blade, and a grinding unit is connected within the groove. When the upper blade descends, it cooperates with the lower blade to cut the sheet metal within the shearing gap. The grinding unit can continue to move downwards with the upper blade to grind the broken edges of the sheet metal. By using the grinding unit within the groove to grind the broken edges of the sheet metal, continuous operation of sheet metal shearing and grinding is achieved; this solves the technical problem in related technologies where burrs at the broken edges of metal sheets processed by shearing machines easily scratch or puncture the skin.

Description

Technical Field

[0001] This invention relates to the field of automotive metal parts processing equipment technology, specifically to a shearing machine for processing automotive parts. Background Technology

[0002] A shearing machine is a machine that uses one blade to reciprocate linearly relative to another blade to shear sheet metal. It utilizes a moving upper blade and a fixed lower blade, with a suitable blade gap, to apply shearing force to metal sheets of various thicknesses, causing the sheet metal to break and separate to the required dimensions. Shearing machines belong to the category of forging and pressing machinery and are primarily used in the metal processing industry. Shearing machines can also be applied to the breaking and separation of other sheet metal materials.

[0003] In existing technologies, aside from interior components, most automotive parts are made of metal, such as the body, chassis, and hood. During actual production, shearing machines are used to cut large sheets of metal into the required sizes and shapes for subsequent processing and assembly. After the metal sheets break apart, burrs and micro-rolled edges inevitably appear at the fracture points. Therefore, extra care must be taken when transporting the cut sheets, and even with protective gear, cuts or punctures from burrs are unavoidable. Thus, existing technologies need improvement and optimization. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a shearing machine for processing automotive parts, which solves the technical problem in the related art that burrs at the fracture points of metal sheets processed by shearing machines can easily scratch or puncture the skin.

[0005] At least one embodiment of the present invention provides a shearing machine for processing automotive parts, comprising: The workbench is equipped with a feeding unit for feeding sheet metal on the receiving side. The cutting blade slides along the material conveying direction on the worktable to support the material supplied by the feeding unit. The upper blade, with a lifting frame positioned above the worktable, rises to form a shearing gap with the lower blade for the material to pass through. A horizontally extending groove is provided on the material-feeding side of the upper blade, and a grinding unit is connected within the groove. When the upper blade descends, it can cooperate with the lower blade to cut the material within the shearing gap. The grinding unit can continue to move downwards with the upper blade to grind the broken edges of the material.

[0006] According to one embodiment provided in this application, the polishing unit includes: There are two base frames, which are respectively oscillatingly positioned at both ends of the groove, and the oscillation axis of the base frames is perpendicular to the conveying direction of the plate. There are two drive shafts, which are rotatably connected to the two base frames in a one-to-one correspondence and are located between the two base frames. The rotation axis of the drive shaft is perpendicular to the swing axis of the base frame. A grinding belt for grinding the plate is connected between the two drive shafts for circulating transmission.

[0007] According to one embodiment of this application, a guide seat is provided on the base frame along the swing axis of the base frame, and a slider is slidably provided on the guide seat. The transmission shaft is rotatably connected to the slider, and the two sliders can slide synchronously to drive the two transmission shafts to move closer or further apart from each other.

[0008] According to one embodiment of this application, an elastic element is connected between the slider and the guide seat, and the elastic force provided by the elastic element can be used to drive the slider to slide.

[0009] According to one embodiment of this application, the workbench is provided with a chute on the feeding side, and the lower blade is slidably disposed in the chute along the conveying direction of the sheet metal.

[0010] According to one embodiment of this application, a linkage unit is provided between the base frame and the lower blade. The linkage unit includes a sliding frame and a linkage frame that slide together. The sliding frame slides along the material conveying direction and is slidably engaged with the groove. The sliding frame has a guide hole. The base frame has a crossbar portion that extends into the guide hole and slides with the guide hole. The linkage frame is raised and lowered on the upper blade. The linkage frame can abut against the lower blade under the downward movement of the upper blade and remain relatively stationary with the lower blade. This allows the sliding frame to slide out of the groove under the limiting action of the linkage frame, so that the crossbar portion slides along the guide hole and drives the grinding unit to swing vertically, thereby allowing the grinding unit to fully grind the fracture point of the material.

[0011] According to one embodiment of this application, a horizontally extending trigger rod is installed on the linkage frame. The trigger rod can abut against the lower blade under the downward movement of the upper blade, and keep the linkage frame and the lower blade relatively stationary.

[0012] According to one embodiment of this application, the linkage frame has a sliding hole that extends obliquely from top to bottom away from the groove, and the end of the sliding frame away from the lower cutter has a sliding rod that is slidably disposed in the sliding hole.

[0013] According to one embodiment of this application, an elastic element two is connected between the sliding frame and the inner sidewall of the groove, and the elastic force provided by the elastic element two can drive the sliding frame to slide along the conveying direction of the plate.

[0014] According to one embodiment of this application, the trigger rod and the linkage frame are connected by a thread.

[0015] This invention provides a shearing machine for processing automotive parts. The system includes a worktable, a lower blade, an upper blade, and a grinding unit. The worktable receives the sheet metal conveyed by the feeding unit. The lower blade slides horizontally on the worktable, with its sliding direction parallel to the sheet metal conveying direction. The lower blade uses a hydraulic cylinder or an electrically driven cylinder as the power source for its sliding, enabling linear movement. The upper blade is mounted above the worktable and moves up and down using a hydraulic cylinder as the power source. When the upper blade is at its upper limit, a shearing gap is formed between the upper and lower blades. At this time, the feeding unit conveys the sheet metal into the shearing gap, placing the sheet metal above the lower blade. Based on subsequent processing requirements, the conveying stops after the sheet metal has been conveyed a certain distance. Then, the upper blade descends, and its blades, along with those of the lower blade, apply shearing force to the sheet metal, completing the shearing and cutting process. The upper blade has an inclined blade, with its extension direction forming an angle with the sheet metal plane, facilitating the shearing of the sheet metal by both the upper and lower blades.

[0016] The feeding unit uses rotating rollers for conveying. The sheet material is laid flat on several spaced conveying rollers, and a pressing roller is installed above the sheet material. When the upper blade descends to shear the sheet material, the pressing roller uses a linear drive device (such as a hydraulic cylinder or electric cylinder) to press the sheet material downward, fixing the sheet material between the pressing roller and the conveying roller. This prevents the sheet material from shifting during shearing, which could lead to shearing failure and the production of defective products.

[0017] After the board is cut, the upper blade continues to move downwards for a certain distance. As the upper blade continues to move downwards, the grinding unit gradually approaches the broken edge of the board and grinds the broken area to eliminate burrs and other defects. This avoids the risk of burrs scratching or piercing the skin, and at the same time, it can improve the processing quality of the board at the sheared fracture point and reduce the risk of measurement errors caused by burrs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a shearing machine for processing automotive parts provided in an embodiment of the present invention; Figure 2 This is an embodiment of the present invention. Figure 1Schematic diagram of the structure at the upper middle part of the blade; Figure 3 This is an embodiment of the present invention. Figure 2 Enlarged view of a section at point M; Figure 4 This is an embodiment of the present invention. Figure 1 Front view; Figure 5 This is an embodiment of the present invention. Figure 1 Right view (showing the upper knife); Figure 6 This is an embodiment of the present invention. Figure 5 Enlarged view of a section at point X; Figure 7 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure when the medium-sized plate just comes into contact with the sanding belt; Figure 8 This is an embodiment of the present invention. Figure 7 Enlarged view of a portion of point Y in the middle; Figure 9 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure when the lower end of the fractured section of the medium plate is only in contact with the grinding belt; Figure 10 This is an embodiment of the present invention. Figure 9 Enlarged view of a section at point Z; Figure 11 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure at the contact point between the grinding belt and the sheet metal.

[0020] In the diagram: 10. Workbench, 11. Slide, 20. Feeding unit, 31. Lower blade, 32. Upper blade, 321. Groove, 33. Shearing gap, 40. Grinding unit, 41. Base frame, 411. Guide seat, 42. Drive shaft, 43. Grinding belt, 44. Slider, 45. Elastic element one, 50. Linkage unit, 51. Sliding frame, 511. Guide hole, 52. Linkage frame, 521. Sliding hole, 53. Trigger rod, 54. Crossbar section, 55. Sliding rod, 56. Elastic element two. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0025] To make the drawings concise and easy to understand, some drawings only show one of the components with the same structure or function, or only one of them is marked. In this article, "one" not only means "only one", but can also mean "more than one", and "several" includes "two" and "more than two".

[0026] Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. The embodiments of this application are described in detail below with reference to the accompanying drawings.

[0027] like Figures 1-5The diagram illustrates a shearing machine for processing automotive parts according to an embodiment of the present invention. It includes a worktable 10, a lower blade 31, an upper blade 32, and a grinding unit 40. The worktable 10 receives sheet metal conveyed by the feeding unit 20. The lower blade 31 is horizontally slidably mounted on the worktable 10, with its sliding direction parallel to the sheet metal conveying direction. The lower blade 31 uses a hydraulic cylinder or an electrically driven cylinder as the power source for its sliding, achieving linear movement. The upper blade 32 is mounted above the worktable 10 and uses a hydraulic cylinder as its power source for grinding. When the upper blade 32 is at its upper limit position, a shearing gap 33 is formed between the upper blade 32 and the lower blade 31. At this time, the feeding unit 20 conveys the board into the shearing gap 33, and the board is located above the lower blade 31. Based on the subsequent processing requirements, the conveying stops after the board has been conveyed for a certain distance. Then the upper blade 32 descends, and the blades of the upper blade 32 and the lower blade 31 apply shearing force to the board to complete the shearing of the board. The blade of the upper blade 32 is an inclined blade, and the extension direction of the blade is set at an angle to the plane of the board, which facilitates the shearing of the board by the upper blade 32 and the lower blade 31.

[0028] The feeding unit 20 uses rotating rollers for conveying. The sheet is laid flat on several spaced conveying rollers. A pressing roller is installed above the sheet. When the upper cutter 32 descends to shear the sheet, the pressing roller uses a linear drive device (such as a hydraulic cylinder or electric cylinder) to press the sheet downward, fixing the sheet between the pressing roller and the conveying roller. This prevents the sheet from shifting during shearing, which could lead to shearing failure and defective products.

[0029] After the board is cut, the upper blade 32 continues to move downwards for a certain distance. As the upper blade 32 continues to move downwards, the grinding unit 40 gradually approaches the broken edge of the board and grinds the broken area to eliminate burrs and other defects. This avoids the risk of burrs scratching or piercing the skin, and at the same time improves the processing quality of the board at the sheared fracture point, reducing the risk of measurement errors caused by burrs.

[0030] refer to Figures 1-10 In some embodiments, the structure of the polishing unit 40 is refined. Specifically, the polishing unit 40 includes a base frame 41, a drive shaft 42, and a polishing belt 43. There are two base frames 41, which are respectively oscillating at both ends of the groove 321. The two base frames 41 are located on the left and right sides of the plate, respectively. The two base frames 41 oscillate coaxially, and the oscillation axis of the base frame 41 is perpendicular to the conveying direction of the plate. The drive shaft 42 is rotatably connected to the base frame 41. The rotation axis of the drive shaft 42 is perpendicular to the oscillation axis of the base frame 41, and the rotation axis of the drive shaft 42 is set at an angle to the conveying direction of the plate. The drive shaft 42 is powered by a motor in the prior art. The power is transmitted to the drive shaft 42 through a power transmission structure commonly used in the prior art (such as bevel gear transmission). The rotating drive shaft 42 drives the polishing belt 43 to perform cyclic transmission.

[0031] When the upper blade 32 is positioned at its upper limit, it is in an empty shearing state. At this time, the feeding unit 20 conveys the sheet metal into the shearing gap 33, and the grinding plane of the grinding belt 43 is set at an angle to the plane of the sheet metal (angle A, e.g., ...). Figure 11 As shown), in the empty shearing state, the included angle A is preferably 70°~85°. The upper edge of the grinding belt 43 (the side near the top sidewall of the groove 321) extends beyond the groove 321, and the lower edge of the grinding belt 43 (the side near the bottom sidewall of the groove 321) is located inside the groove 321. As the upper blade 32 descends, the shearing operation of the board begins. After the board is sheared, the upper blade 32 continues to move downwards for a certain distance, and the grinding belt 43 located outside the groove 321 gradually approaches and contacts the broken part of the board. The grinding belt 43 circulates... The grinding unit 40, in conjunction with the downward movement of the upper blade 32, grinds the fracture edge of the board, focusing on the upper part of the fracture. Once the grinding belt 43 contacts the board, an external force drives the base frame 41 to swing. As the base frame 41 swings, the included angle A gradually increases. When the included angle A equals 90°, the grinding belt 43 can grind the cross-section of the fracture. When the included angle A exceeds 90°, the grinding belt 43 can then grind the lower edge of the fracture, achieving comprehensive and thorough grinding of the fracture. The specific structure of the grinding unit 40 enhances the integrity and consistency of the grinding at the board fracture.

[0032] As a specific embodiment, refer to Figures 1-10 The grinding unit 40 has been further optimized. A guide seat 411 has been added to the base 41, and a slider 44 is slidably mounted on the guide seat 411. The slider 44 is rotatably engaged with the end shaft of the transmission shaft 42. An elastic element 45 connects the slider 44 and the guide seat 411. One end of the elastic element 45 acts on the slider 44, and the other end acts on the guide seat 411. The elastic element 45 is a spring from the prior art. The elastic force provided by the elastic element 45 allows for elastic adjustment. The relative position between the drive shaft 42 and the base frame 41; when the plate comes into contact with the grinding belt 43, with the help of the slider 44, guide seat 411 and elastic element 45, the grinding belt 43 is kept taut, and the plate can avoid the plate from exerting a large pressure on the grinding belt 43, causing the grinding belt 43 to be overly taut. This achieves elastic change in the position of the grinding belt 43, which reduces the cutting damage of the plate to the grinding belt 43 while ensuring the grinding effect of the grinding belt 43, and extends the service life of the grinding belt 43.

[0033] Further, refer to Figures 1-10The structure of the worktable 10 has been optimized by adding a slide groove 11 to the upper surface of the worktable 10. The lower blade 31 can slide along the direction of the sheet material conveying. When performing a shearing operation, the lower blade 31 slides away from the slide groove 11, defined as forward sliding, until the lower blade 31 moves to a preset position. After the sheet material is in place, the upper blade 32 moves downward to cooperate with the lower blade 31 to shear the sheet material. After the sheet material is sheared, before the sheet material contacts the grinding belt 43, an external force is applied to drive the lower blade 31 to slide closer to the slide groove 11, so that the front end of the sheet material extends beyond the lower blade 31 by a certain distance. The external force can be a hydraulic cylinder or a linearly driven electric cylinder in the prior art. Then the lower blade 31 stops sliding; the upper blade... 32 continues to move downwards until the grinding belt 43 contacts and grinds the upper edge of the broken part of the board. As the upper blade 32 continues to move downwards, the base frame 41 begins to swing. When the included angle A is equal to 90°, the exposed surface of the grinding belt 43 is beyond the groove 321. With the help of the slider 44 and the elastic element 45, the tension of the grinding belt 43 can be adjusted elastically in real time to avoid excessive tension of the grinding belt 43, which may cause abnormal wear or breakage. At this time, it is also convenient to wrap and grind the entire broken part of the board, mainly grinding the front end face of the broken part of the board. When the included angle A is greater than 90°, the lower edge of the broken part of the board is mainly ground. The grinding unit 40 realizes the comprehensive grinding of the broken part of the board. With the help of the lower blade 31 sliding towards the slide groove 11, space is provided for the grinding belt 43 to wrap the broken part of the board, avoiding the grinding belt 43 from abutting against the lower blade 31.

[0034] Further, refer to Figures 1-10A linkage unit 50 is added to the upper blade 32. This linkage unit 50 combines the downward movement of the upper blade 32 with the rotation of the base frame 41, improving the coordination between the two operations and increasing the utilization rate of the downward movement of the upper blade 32, achieving multiple effects with a single action. Specifically, the linkage unit 50 includes a sliding frame 51, a linkage frame 52, and a trigger rod 53. The sliding frame 51 is slidably disposed within the groove 321 and has a vertically extending guide hole 511. The base frame 41 has a horizontal bar portion 54 that slides within the guide hole 511. A sliding rod 55 is located at the end of the sliding frame 51 furthest from the groove 321. The linkage frame 52 has an inclined sliding hole 521, and the sliding rod 55 is slidably disposed in the sliding hole 521. Further, an elastic element 56 is connected between the sliding frame 51 and the inner wall of the groove 321. The elastic element 56 is a spring, a material used in the prior art. One end of the elastic element 56 acts on the sliding frame 51, and the other end acts on the inner wall of the groove 321. The force provided by the elastic element 56 drives the sliding frame 51 to slide along the conveying direction of the plate. After the grinding belt 43 completes the grinding operation, the upper blade 32 moves upward, and the elastic force provided by the elastic element 56 can be used to restore the linkage unit 50 to its initial state. A trigger rod 53 is threadedly connected to the upper end of the linkage frame 52. The threaded connection allows adjustment of the relative position of the trigger rod 53 and the linkage frame 52, and also facilitates the installation and removal of the trigger rod 53.

[0035] In use, when the grinding belt 43 contacts the broken part of the board, the end of the trigger rod 53 near the board abuts against the upper surface of the lower blade 31. As the upper blade 32 continues to move downward, under the support of the lower blade 31, the linkage frame 52, the trigger rod 53, and the lower blade 31 remain relatively stationary, and the linkage frame 52 slides upward relative to the upper blade 32. Taking the upper blade 32 as a reference, the linkage frame 52 slides upward, driving the slide rod 55 to slide diagonally downward along the sliding hole 521. The rod 55 will drive the sliding frame 51 to slide away from the groove 321. At this time, the sliding frame 51 is defined as sliding backward. The sliding frame 51 sliding backward will drive the crossbar part 54 to slide in the guide hole 511. The guide hole 511 is a long hole that extends vertically. While the crossbar part 54 slides in the guide hole 511, it will also slide backward with the sliding frame 51, which will cause the base frame 41 to start swinging. At this time, the included angle A gradually increases, so that the grinding belt 43 gradually wraps around the fracture of the entire board and grinds it.

[0036] With the direction of plate feeding as the front, guide rails are provided on both the left and right sides of the groove. Each base frame 41 is provided with two crossbars 54. The lower crossbar 54 is slidably engaged with the guide hole 511. Both crossbars 54 extend into the guide rails. The guide rails are used to limit and constrain the swing angle of the base frame 41 to prevent the base frame 41 from swinging too much.

[0037] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A shearing machine for processing automotive parts, characterized in that, include: The workbench (10) is provided with a feeding unit (20) for feeding the sheet metal on the receiving side. The lower blade (31) is slidably mounted on the worktable (10) along the conveying direction of the sheet material, and is used to support the sheet material supplied by the feeding unit (20); The upper blade (32) is lifted and mounted above the worktable (10). After the upper blade (32) rises, it can form a shearing gap (33) between itself and the lower blade (31) for the plate to pass through. The upper blade (32) has a horizontally extending groove (321) on the material receiving side. A grinding unit (40) is connected in the groove (321). After the upper blade (32) falls, it can cooperate with the lower blade (31) to cut the plate in the shearing gap (33). The grinding unit (40) can follow the upper blade (32) to continue to move down to grind the broken edge of the plate.

2. The shearing machine for processing automotive parts according to claim 1, characterized in that, The polishing unit (40) includes: There are two base frames (41), which are respectively oscillating at both ends of the groove (321). The oscillation axis of the base frame (41) is perpendicular to the conveying direction of the plate. There are two drive shafts (42), which are rotatably connected to the two base frames (41) in a one-to-one correspondence and are located between the two base frames (41). The rotation axis of the drive shaft (42) is perpendicular to the swing axis of the base frame (41). A grinding belt (43) for grinding the plate is connected between the two drive shafts (42) for circulating transmission.

3. A shearing machine for processing automotive parts according to claim 2, characterized in that, The base frame (41) is provided with a guide seat (411) arranged along the swing axis of the base frame (41). A slider (44) is slidably provided on the guide seat (411). The transmission shaft (42) is rotatably connected to the slider (44). The two sliders (44) can slide synchronously to drive the two transmission shafts (42) to move closer or further away from each other.

4. A shearing machine for processing automotive parts according to claim 3, characterized in that, An elastic element (45) is connected between the slider (44) and the guide seat (411), and the elastic force provided by the elastic element (45) can be used to drive the slider (44) to slide.

5. A shearing machine for processing automotive parts according to claim 2, characterized in that, The workbench (10) has a chute (11) on the feeding side, and the lower blade (31) is slidably disposed in the chute (11) along the conveying direction of the plate.

6. A shearing machine for processing automotive parts according to claim 2, characterized in that, A linkage unit (50) is provided between the base frame (41) and the lower cutter (31). The linkage unit (50) includes a sliding frame (51) and a linkage frame (52) that slide together. The sliding frame (51) slides along the plate conveying direction and is in slidable engagement with the groove (321). A guide hole (511) is provided on the sliding frame (51). The base frame (41) has a crossbar (54) that extends into the guide hole (511) and slides together with it. The moving frame (52) is raised and lowered on the upper blade (32). The linkage frame (52) can abut against the lower blade (31) under the downward drive of the upper blade (32) and remain relatively stationary with the lower blade (31). This causes the sliding frame (51) to slide out of the groove (321) under the limiting action of the linkage frame (52), so that the crossbar (54) slides along the guide hole (511) and drives the grinding unit (40) to swing vertically, thereby allowing the grinding unit (40) to grind the broken part of the plate.

7. A shearing machine for processing automotive parts according to claim 6, characterized in that, A horizontally extending trigger rod (53) is installed on the linkage frame (52). The trigger rod (53) can abut against the lower blade (31) under the downward movement of the upper blade (32), and keep the linkage frame (52) and the lower blade (31) relatively stationary.

8. A shearing machine for processing automotive parts according to claim 6, characterized in that, The linkage frame (52) has a sliding hole (521) that extends obliquely from top to bottom away from the groove (321). The sliding frame (51) has a sliding rod (55) at one end away from the lower cutter (31). The sliding rod (55) is slidably disposed in the sliding hole (521).

9. A shearing machine for processing automotive parts according to claim 6, characterized in that, An elastic element two (56) is connected between the sliding frame (51) and the inner wall of the groove (321). The elastic force provided by the elastic element two (56) can drive the sliding frame (51) to slide along the conveying direction of the plate.

10. A shearing machine for processing automotive parts according to claim 7, characterized in that, The trigger rod (53) and the linkage frame (52) are connected by a thread.

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