Plate shearing machine for automobile metal part manufacturing

Abstract

The invention discloses a plate shearing machine for automobile metal part manufacturing. Comprising a clamping and rotating unit used for clamping a metal plate and capable of driving the metal plate to rotate, a driving unit provided with two moving ends which are arranged at intervals in the vertical direction and located on the two sides of the metal plate correspondingly, and a pair of angle adjusting units symmetrically assembled on the two moving ends of the driving unit correspondingly. The two moving ends of the driving unit can synchronously move close to or away from the rotating axis of the metal plate, the angle adjusting unit comprises a vertical first motor assembled at the moving ends of the driving unit and a rotating arm in a vertical state, and a cutting unit is assembled on the rotating arm located on the upper portion. The cutting unit comprises a cutting knife and a first driving mechanism, the axis of the cutting knife is in a horizontal state, the cutting knife can rotate around the axis of the cutting knife, the first driving mechanism is used for driving the cutting knife to rotate, a base plate is assembled on the rotating arm located on the lower portion, and an annular groove is formed in the outer side wall of the base plate coaxially in a sunken mode. The practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field related to metal plate processing, and in particular to a shearing machine for manufacturing automobile metal parts. Background Art

[0002] The main function of the shearing machine is to cut and process metal plates, apply shear force to metal plates of various thicknesses, and break and separate the plates according to the required size.

[0003] There are laser cutting machines in the prior art that can cut metal plates into desired shapes. However, the metal plates processed by laser cutting machines are generally thicker than 1 mm. Since the metal plates are too thin, they are easily deformed by heat during laser cutting. Therefore, metal plates with a thickness of less than 1 mm are processed by shearing machines. However, existing shearing machines can only cut straight lines and cannot process irregular metal plates according to actual needs. If a handheld cutting machine is used for cutting, not only is the cutting efficiency low and the labor intensity high, but the risk factor is also high. Therefore, it is necessary to design a shearing machine for the manufacture of automotive metal parts. Summary of the invention

[0004] In view of the above technical problems, the purpose of the present invention is to overcome the problem that the shearing machine in the prior art cannot process metal plates with irregular shapes.

[0005] In order to achieve the above-mentioned object, the present invention provides a shearing machine for manufacturing automobile metal parts, comprising: a clamping and rotating unit for clamping a horizontal metal plate and driving the metal plate to rotate, a driving unit having two movable ends arranged at intervals in the vertical direction and respectively located on both sides of the metal plate, and a pair of angle adjustment units respectively assembled on the two movable ends of the driving unit in a symmetrical state;

[0006] The two moving ends of the driving unit can move synchronously toward or away from the rotation axis of the metal plate. The angle adjustment unit includes a vertical first motor mounted on the moving end of the driving unit and a rotating arm in a vertical state and fixedly connected to the output shaft of the motor. The upper rotating arm is equipped with a cutting unit, and the cutting unit includes a disc-shaped cutting knife whose axis is horizontal and can rotate around its own axis, and a first driving mechanism for rotating the cutting knife. The lower rotating arm is equipped with a chassis located directly below the cutting knife and matching the cutting knife. The outer side wall of the chassis is coaxially recessed with an annular groove for inserting the edge of the cutting knife.

[0007] Preferably, a horizontal first limit plate is fixedly mounted on the lower rotating arm through a first connecting frame, the edge of the first limit plate is bent downward, and a horizontal second limit plate is fixedly mounted on the upper rotating arm through a second connecting frame, the outer edge of the second limit plate is bent upward, and a first through slot for the cutting knife to pass through is penetrated on both the first limit plate and the second limit plate;

[0008] The first limiting plate and the second limiting plate are arranged at a distance to form a material passing channel for the metal plate to pass through.

[0009] Preferably, the first driving mechanism comprises a vertical second motor fixedly mounted on the rotating arm, a vertical first connecting shaft mounted on the rotating arm through a plurality of first shaft seats and connected to the output shaft of the second motor, and a horizontal second connecting shaft axially connected to the lower end of the rotating arm and drivingly connected to the first connecting shaft through a pair of first bevel teeth;

[0010] The second connecting shaft is provided with a limiting flange which can contact with one side of the cutting blade, and the end of the second connecting shaft away from the first bevel gear is threadedly connected with a hexagonal pressing plate which can press on the cutting blade.

[0011] Preferably, the second limiting plate includes a first split plate fixedly connected to the second connecting frame and located on the side of the cutting knife close to the first bevel tooth, a second split plate located on the side of the cutting knife away from the first bevel tooth, a plurality of horizontal connecting rods fixedly connected to the upper surface of the second split plate, and a plurality of mounting sleeves that are all fixedly mounted on the first split plate and for the corresponding connecting rods to be inserted, the space between the first split plate and the second split plate is the above-mentioned first through groove, and each of the mounting sleeves is threadedly connected to a locking bolt whose end can abut against the connecting rod.

[0012] Preferably, the driving unit includes a first mounting frame, a pair of horizontal moving mechanisms arranged at intervals in the vertical direction and mounted on the first mounting frame, a third motor fixedly mounted on the first mounting frame, and a transmission shaft mounted on the first mounting frame through a plurality of second shaft seats and connected to the third motor at one end, and each horizontal moving mechanism is connected to the transmission shaft through a pair of second bevel teeth.

[0013] Preferably, the horizontal moving mechanism includes at least one horizontal mounting arm fixedly connected to the first mounting frame, at least one strip slide seat mounted on the corresponding mounting arm in the same length direction, a slider slidably mounted on the strip slide seat, and a horizontal threaded rod mounted on one of the mounting arms through a plurality of third shaft seats and threadedly passing through the slider, the end of the threaded rod being fixedly connected to the corresponding second bevel tooth, and the slider is the moving end of the above-mentioned drive unit.

[0014] Preferably, the clamping and rotating unit includes a second mounting frame, a mounting block fixedly connected to the lower part of the second mounting frame through a third connecting frame, a vertical third connecting shaft axially connected to the mounting block, a spline sleeve coaxially arranged with the third connecting shaft and assembled on the top of the second mounting frame through a fourth shaft seat, a spline shaft vertically sliding through the spline sleeve, a vertical driving push rod assembled on the top of the second mounting frame through the third mounting frame and with the output end axially connected to the upper end of the spline shaft, and a second driving mechanism assembled on the second mounting frame for driving the spline sleeve and the third connecting shaft to rotate synchronously, wherein a chuck is fixedly connected to the upper end of the third connecting shaft and the lower end of the spline shaft.

[0015] Preferably, the second driving mechanism comprises a fourth vertical connecting shaft mounted on the second mounting frame via a plurality of fifth shaft seats and a fourth motor mounted on the second mounting frame and having an output end connected to one end of the fourth connecting shaft;

[0016] The upper end of the fourth connecting shaft is transmission connected to the spline sleeve through a first synchronous belt and a pair of first synchronous wheels, and the lower end of the fourth connecting shaft is transmission connected to the third connecting shaft through a second synchronous belt and a pair of second synchronous wheels.

[0017] According to the above technical scheme, the present invention provides a shearing machine for manufacturing automobile metal parts, which has the following beneficial technical effects compared with the prior art: during the metal plate cutting process, the clamping rotation unit drives the metal plate to rotate, and the driving unit can drive the cutting knife and the chassis to move synchronously, thereby adjusting the distance between the cutting knife and the chassis and the rotating axis of the metal plate, and the angle adjustment mechanism can drive the rotating arm to rotate, thereby driving the cutting knife and the chassis to rotate, adjusting the direction of the cutting knife, thereby cutting the metal plate into the desired irregular shape, and has strong practicality.

[0018] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation mode; and the parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a shearing machine for manufacturing automobile metal parts provided by the present invention;

[0021] Figure 2 The invention provides a shearing machine for manufacturing automobile metal parts. Figure 1 Schematic diagram of the perspective along A;

[0022] Figure 3It is a partial three-dimensional structural schematic diagram of a shearing machine for manufacturing automobile metal parts provided by the present invention;

[0023] Figure 4 The invention provides a shearing machine for manufacturing automobile metal parts. Figure 2 The enlarged schematic diagram of point B in the middle;

[0024] Figure 5 It is a partially exploded schematic diagram of a shearing machine for manufacturing automobile metal parts provided by the present invention;

[0025] Figure 6 The present invention is a schematic diagram of the three-dimensional structure of a clamping and rotating unit of a shearing machine for manufacturing automobile metal parts.

[0026] Description of Reference Numerals

[0027] 1. First motor; 2. Rotating arm; 3. Cutting knife; 4. Chassis; 5. First connecting frame; 6. First limiting plate; 7. Second connecting frame; 8. Second motor; 9. First connecting shaft; 10. Second connecting shaft; 11. First dividing plate; 12. Second dividing plate; 13. Connecting rod; 14. Mounting sleeve; 15. Locking bolt; 16. First mounting frame; 17. Third motor; 18. Transmission shaft; 19. Mounting arm; 20. Slider; 21. Strip slide; 22. Threaded rod; 23. Second mounting frame; 24. Mounting block; 25. Third connecting shaft; 26. Spline shaft; 27. Driving push rod; 28. Chuck; 29. ​​Fourth connecting shaft; 30. Fourth motor. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0029] In the present invention, unless otherwise stated, directional words such as "upper, lower, inside, outside" contained in a term merely represent the orientation of the term in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0030] like Figure 1-6 As shown, a shearing machine for manufacturing automobile metal parts comprises: a clamping and rotating unit for clamping a horizontal metal plate and driving the metal plate to rotate, a driving unit having two movable ends arranged at intervals in the vertical direction and respectively located on both sides of the metal plate, and a pair of angle adjustment units respectively assembled on the two movable ends of the driving unit in a symmetrical state;

[0031] The two moving ends of the driving unit can move synchronously toward or away from the rotation axis of the metal plate. The angle adjustment unit includes a vertical first motor 1 mounted on the moving end of the driving unit and a rotating arm 2 in a vertical state and fixedly connected to the output shaft of the motor. The rotating arm 2 located above is equipped with a cutting unit, and the cutting unit includes a disc-shaped cutting knife 3 whose axis is horizontal and can rotate around its own axis, and a first driving mechanism for rotating the cutting knife 3. The rotating arm 2 located below is equipped with a chassis 4 located directly below the cutting knife 3 and matching the cutting knife 3. The outer wall of the chassis 4 is coaxially recessed with an annular groove for inserting the edge of the cutting knife 3.

[0032] In the above technical solution, a horizontal metal plate is clamped by a clamping and rotating unit, and the two moving ends of the driving unit move synchronously close to the rotating axis of the metal plate. The first driving unit drives the cutting knife 3 to rotate, and the cutting knife 3 and the chassis 4 move to the two sides of the metal plate respectively. The edge blade of the cutting knife 3 will cut the metal plate. During the metal plate cutting process, the clamping and rotating unit drives the metal plate to rotate, and the driving unit can drive the cutting knife 3 and the chassis 4 to move synchronously, thereby adjusting the distance between the cutting knife 3 and the chassis 4 and the rotating axis of the metal plate, and the angle adjustment mechanism can drive the rotating arm 2 to rotate, thereby driving the cutting knife 3 and the chassis 4 to rotate, and adjusting the direction of the cutting knife 3, so as to cut the metal plate into the desired irregular shape, which is highly practical.

[0033] In a preferred embodiment of the invention, a horizontal first limit plate 6 is fixedly mounted on the lower rotating arm 2 through a first connecting frame 5, and the edge of the first limit plate 6 is bent downward, and a horizontal second limit plate is fixedly mounted on the upper rotating arm 2 through a second connecting frame 7, and the outer edge of the second limit plate is bent upward, and the first limit plate 6 and the second limit plate are both penetrated by a first through slot for the cutting knife 3 to pass through;

[0034] The first limiting plate 6 and the second limiting plate are spaced apart to form a material passage for the metal plate to pass through.

[0035] In the above technical solution, when the cutting knife 3 and the chassis 4 cut the metal plate, the metal plate is subjected to the downward shearing pressure of the cutting knife 3, which will cause the two sides of the metal plate to warp upward, and the function of the first limiting plate 6 and the second limiting plate is to prevent the metal plate from warping upward and deforming during the cutting process, and the edges of the first limiting plate 6 and the second limiting plate are inclined away from the metal plate, which is conducive to the movement of the first limiting plate 6 and the second limiting plate without causing scratches to the metal plate, and is also conducive to the movement of the first limiting plate 6 and the second limiting plate to the two sides of the metal plate.

[0036] In a preferred embodiment of the invention, the first driving mechanism comprises a vertical second motor 8 fixedly mounted on the rotating arm 2, a vertical first connecting shaft 9 mounted on the rotating arm 2 through a plurality of first shaft seats and connected to the output shaft of the second motor 8, and a horizontal second connecting shaft 10 axially connected to the lower end of the rotating arm 2 and transmission-connected to the first connecting shaft 9 through a pair of first bevel teeth;

[0037] The second connecting shaft 10 is provided with a limiting flange that can contact one side of the cutting blade 3 , and the end of the second connecting shaft 10 away from the first bevel gear is threadedly connected with a hexagonal pressure plate that can press on the cutting blade 3 .

[0038] In the above technical solution, the second motor 8 drives the first connecting shaft 9 to rotate, and the first connecting shaft 9 drives the second connecting shaft 10 to rotate through a pair of first bevel teeth, thereby driving the cutting knife 3 to rotate; because the edge of the cutting knife 3 will gradually become blunt after use, the cutting knife 3 needs to be replaced regularly. By loosening the hexagonal pressure plate, the old cutting knife 3 can be removed, and then the new cutting knife 3 is mounted on the second connecting shaft 10, and the hexagonal pressure plate is tightened. The hexagonal pressure plate and the limit flange tightly clamp the metal plate from both sides.

[0039] In a preferred embodiment of the invention, the second limiting plate includes a first split plate 11 fixedly connected to the second connecting frame 7 and located on the side of the cutting knife 3 close to the first bevel tooth, a second split plate 12 located on the side of the cutting knife 3 away from the first bevel tooth, a plurality of horizontal connecting rods 13 fixedly connected to the upper surface of the second split plate 12, and a plurality of mounting sleeves 14 fixedly mounted on the first split plate 11 and for the corresponding connecting rods 13 to be inserted, the space between the first split plate 11 and the second split plate 12 is the above-mentioned first through groove, and each of the mounting sleeves 14 is threadedly connected with a locking bolt 15 whose end can abut against the connecting rod 13.

[0040] In the above technical solution, the second sub-plate 12 is arranged to be detachable in order to facilitate the replacement of the cutting knife 3. The locking bolt 15 is loosened and the second sub-plate 12 is pulled so that the connecting rod 13 is separated from the mounting sleeve 14. At this time, the installation and removal of the cutting knife 3 will not be hindered; when the cutting knife 3 is replaced, the connecting rod 13 is inserted into the corresponding mounting sleeve 14, and the locking bolt 15 is tightened to tightly contact the connecting rod 13, so that the connecting rod 13 and the mounting sleeve 14 can be fixed.

[0041] In a preferred embodiment of the invention, the driving unit includes a first mounting frame 16, a pair of horizontal moving mechanisms arranged at intervals in the vertical direction and mounted on the first mounting frame 16, a third motor 17 fixedly mounted on the first mounting frame 16, and a transmission shaft 18 mounted on the first mounting frame 16 through a plurality of second shaft seats and connected to the third motor 17 at one end, and each horizontal moving mechanism is transmission-connected to the transmission shaft 18 through a pair of second bevel teeth.

[0042] In the above technical solution, the third motor 17 is started to drive the transmission shaft 18 to rotate, and the transmission shaft 18 will drive a pair of horizontal moving mechanisms to start synchronously, thereby driving the cutting knife 3 and the chassis 4 to move simultaneously.

[0043] In a preferred embodiment of the invention, the horizontal moving mechanism includes at least one horizontal mounting arm 19 fixedly connected to the first mounting frame 16, at least one strip slide 21 assembled on the corresponding mounting arm 19 in the same length direction, a slider 20 slidably assembled on the strip slide 21, and a horizontal threaded rod 22 assembled on one of the mounting arms 19 through a plurality of third shaft seats and threadedly passing through the slider 20, the end of the threaded rod 22 is fixedly connected to the corresponding second bevel tooth, and the slider 20 is the moving end of the above-mentioned drive unit.

[0044] In the above technical solution, the transmission shaft 18 drives the threaded rod 22 to rotate through a pair of second bevel teeth, the threaded rod 22 drives the slider 20 to slide on the strip slide 21, the slider 20 drives the rotating arm 2 to move, and the upper and lower sliders 20 move synchronously, thereby driving the cutting knife 3 and the chassis 4 to move synchronously.

[0045] In a preferred embodiment of the invention, the clamping and rotating unit includes a second mounting frame 23, a mounting block 24 fixedly connected to the lower part of the second mounting frame 23 through a third connecting frame, a vertical third connecting shaft 25 axially connected to the mounting block 24, a spline sleeve coaxially arranged with the third connecting shaft 25 and assembled on the top of the second mounting frame 23 through a fourth shaft seat, a spline shaft 26 vertically sliding through the spline sleeve, a vertical driving push rod 27 assembled on the top of the second mounting frame 23 through the third mounting frame and with the output end axially connected to the upper end of the spline shaft 26, and a second driving mechanism assembled on the second mounting frame 23 for driving the spline sleeve and the third connecting shaft 25 to rotate synchronously, and a chuck 28 is fixedly connected to the upper end of the third connecting shaft 25 and the lower end of the spline shaft 26.

[0046] In the above technical solution, the metal plate is placed on the chuck 28 located below, and the driving push rod 27 drives the spline shaft 26 to move vertically downward, so that the chuck 28 located above is in contact with the metal plate. The two chucks 28 clamp the metal plate from both sides, and the second driving mechanism drives the spline sleeve and the third connecting shaft 25 to rotate synchronously, and the spline sleeve drives the spline shaft 26 to rotate, thereby driving the metal plate to rotate through the two chucks 28.

[0047] In a preferred embodiment of the invention, the second driving mechanism comprises a vertical fourth connecting shaft 29 mounted on the second mounting frame 23 through a plurality of fifth shaft seats and a fourth motor 30 mounted on the second mounting frame 23 and having an output end connected to one end of the fourth connecting shaft 29;

[0048] The upper end of the fourth connecting shaft 29 is transmission connected to the spline sleeve through a first synchronous belt and a pair of first synchronous wheels, and the lower end of the fourth connecting shaft 29 is transmission connected to the third connecting shaft 25 through a second synchronous belt and a pair of second synchronous wheels.

[0049] In the above technical solution, the fourth motor 30 starts to drive the fourth connecting shaft 29 to rotate, the fourth connecting shaft 29 drives the spline sleeve to rotate through the first synchronous drive and a pair of first synchronous wheels, the fourth connecting shaft 29 drives the third connecting shaft 25 to rotate through the second synchronous drive and a pair of second synchronous wheels, thereby driving the two chucks 28 to rotate synchronously.

[0050] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0051] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0052] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A shearing machine for manufacturing automobile metal parts, characterized in that: include: A clamping and rotating unit for clamping a horizontal metal plate and driving the metal plate to rotate, a driving unit having two movable ends spaced apart in a vertical direction and respectively located on both sides of the metal plate, and a pair of angle adjustment units symmetrically mounted on the two movable ends of the driving unit; The two movable ends of the driving unit can synchronously move toward or away from the rotation axis of the metal plate. The angle adjustment unit comprises a vertical first motor (1) mounted on the movable end of the driving unit and a rotating arm (2) in a vertical state and fixedly connected to the output shaft of the motor. The rotating arm (2) located at the top is equipped with a cutting unit, and the cutting unit comprises a disc-shaped cutting knife (3) whose axis is in a horizontal state and can rotate around its own axis, and a first driving mechanism for rotating the cutting knife (3). The rotating arm (2) located at the bottom is equipped with a chassis (4) located directly below the cutting knife (3) and matching the cutting knife (3). The outer wall of the chassis (4) is coaxially recessed with an annular groove for inserting the edge of the cutting knife (3).

2. A shearing machine for manufacturing automobile metal parts according to claim 1, characterized in that: A first horizontal limit plate (6) is fixedly mounted on the rotating arm (2) located at the bottom via a first connecting frame (5), and the edge of the first limit plate (6) is bent downward; a second horizontal limit plate is fixedly mounted on the rotating arm (2) located at the top via a second connecting frame (7), and the outer edge of the second limit plate is bent upward; and a first through slot for the cutting knife (3) to pass through is provided on both the first limit plate (6) and the second limit plate; The first limiting plate (6) and the second limiting plate are arranged at a distance to form a material passing channel for the metal plate to pass through.

3. A shearing machine for manufacturing automobile metal parts according to claim 2, characterized in that: The first driving mechanism comprises a vertical second motor (8) fixedly mounted on the rotating arm (2), a vertical first connecting shaft (9) mounted on the rotating arm (2) via a plurality of first shaft seats and connected to the output shaft of the second motor (8), and a horizontal second connecting shaft (10) axially connected to the lower end of the rotating arm (2) and transmission-connected to the first connecting shaft (9) via a pair of first bevel teeth; The second connecting shaft (10) is provided with a limiting flange that can abut against one side of the cutting blade (3), and the end of the second connecting shaft (10) away from the first bevel tooth is threadedly connected with a hexagonal pressure plate that can press on the cutting blade (3).

4. A shearing machine for manufacturing automobile metal parts according to claim 3, characterized in that: The second limiting plate comprises a first dividing plate (11) fixedly connected to the second connecting frame (7) and located on the side of the cutting blade (3) close to the first bevel tooth, a second dividing plate (12) located on the side of the cutting blade (3) away from the first bevel tooth, a plurality of horizontal connecting rods (13) fixedly connected to the upper surface of the second dividing plate (12), and a plurality of mounting sleeves (14) fixedly mounted on the first dividing plate (11) and for corresponding connecting rods (13) to be inserted, the space between the first dividing plate (11) and the second dividing plate (12) being the first through groove mentioned above, and each of the mounting sleeves (14) is threadedly connected with a locking bolt (15) whose end can abut against the connecting rod (13).

5. A shearing machine for manufacturing automobile metal parts according to claim 1, characterized in that: The driving unit comprises a first mounting frame (16), a pair of horizontal moving mechanisms arranged at intervals in the vertical direction and both mounted on the first mounting frame (16), a third motor (17) fixedly mounted on the first mounting frame (16), and a transmission shaft (18) mounted on the first mounting frame (16) via a plurality of second shaft seats and connected to the third motor (17) at one end, wherein each horizontal moving mechanism is transmission-connected to the transmission shaft (18) via a pair of second bevel gears.

6. A shearing machine for manufacturing automobile metal parts according to claim 5, characterized in that: The horizontal moving mechanism comprises at least one horizontal mounting arm (19) fixedly connected to the first mounting frame (16), at least one strip slide seat (21) mounted on the corresponding mounting arm (19) in the same length direction, a slider (20) slidably mounted on the strip slide seat (21), and a horizontal threaded rod (22) mounted on one of the mounting arms (19) through a plurality of third shaft seats and threadedly passing through the slider (20), the end of the threaded rod (22) being fixedly connected to the corresponding second bevel gear, and the slider (20) is the moving end of the above-mentioned driving unit.

7. A shearing machine for manufacturing automobile metal parts according to claim 1, characterized in that: The clamping and rotating unit comprises a second mounting frame (23), a mounting block (24) fixedly connected to the lower part of the second mounting frame (23) via a third connecting frame, a vertical third connecting shaft (25) axially connected to the mounting block (24), a spline sleeve coaxially arranged with the third connecting shaft (25) and mounted on the top of the second mounting frame (23) via a fourth shaft seat, a spline shaft (26) vertically sliding through the spline sleeve, a vertical driving push rod (27) mounted on the top of the second mounting frame (23) via the third mounting frame and having an output end axially connected to the upper end of the spline shaft (26), and a second driving mechanism mounted on the second mounting frame (23) for driving the spline sleeve and the third connecting shaft (25) to rotate synchronously, wherein a chuck (28) is fixedly connected to the upper end of the third connecting shaft (25) and the lower end of the spline shaft (26).

8. A shearing machine for manufacturing automobile metal parts according to claim 7, characterized in that: The second driving mechanism comprises a fourth vertical connecting shaft (29) mounted on the second mounting frame (23) via a plurality of fifth shaft seats, and a fourth motor (30) mounted on the second mounting frame (23) and having an output end connected to one end of the fourth connecting shaft (29); The upper end of the fourth connecting shaft (29) is transmission connected to the spline sleeve through a first synchronous belt and a pair of first synchronous wheels, and the lower end of the fourth connecting shaft (29) is transmission connected to the third connecting shaft (25) through a second synchronous belt and a pair of second synchronous wheels.

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