Metal cutting machine tool for automobile part production

Abstract

The invention discloses a metal cutting machine tool for automobile part production, and belongs to the technical field of automobile part production. The metal cutting machine tool comprises a base, a machining fixing structure for fixing parts is arranged in the base, a mounting groove is formed in the base, and the machining fixing structure is in sliding fit with the mounting groove; a mounting frame is arranged on the base, a cutting moving structure is arranged on the mounting frame, an angle rotating structure is arranged on the cutting moving structure, a workpiece cutting structure is arranged on the angle rotating structure, and the workpiece cutting structure is rotationally connected with the angle rotating structure. A driving motor works to drive a driving plate to rotate so as to drive a driving column to move up and down in a mounting lug, so that a cutting and polishing column is driven to horizontally move on a mounting rod and rotate during movement; the cutting output can be accurately controlled, the method is suitable for complex contour machining, the machining range is expanded, multi-task integrated machining is achieved, the surface flatness is improved, and the surface roughness is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive parts production, and particularly relates to a metal cutting machine tool for automotive parts production. Background Art

[0002] The automotive industry is an important pillar industry of the national economy. With the development of the global economy and the improvement of people's living standards, the demand for automobiles continues to grow. In order to meet the market demand, automotive production enterprises continuously expand their production scale, and put forward higher requirements for the production efficiency and quality of automotive parts. As a key equipment for automotive parts processing, the technical level of metal cutting machine tools directly affects the processing accuracy, production efficiency and cost of automotive parts.

[0003] However, in the existing process of cutting automotive parts, only single-position or single-angle cutting can be performed on the parts. Automotive parts usually have complex shapes and structures. If only single-position or single-angle cutting can be performed, multiple clamping and adjustment of the machine tool are often required to complete the processing of one part. Switching from cutting at one position or angle to cutting at another position or angle will increase a large amount of auxiliary time and reduce the overall processing efficiency. Summary of the Invention

[0004] Embodiments of the present invention provide a metal cutting machine tool for automotive parts production to solve the problems in the prior art.

[0005] Embodiments of the present invention adopt the following technical solutions: A metal cutting machine tool for automotive parts production includes a base. A processing and fixing structure for fixing parts is provided inside the base. An installation groove is provided inside the base. The processing and fixing structure is slidably matched with the installation groove. An installation frame is provided on the base. A cutting and moving structure is provided on the installation frame. An angle rotation structure is provided on the cutting and moving structure. A workpiece cutting structure is provided on the angle rotation structure. The workpiece cutting structure is rotatably connected to the angle rotation structure.

[0006] Further technical solution, the processing and fixing structure includes a first fixing support plate, a second fixing support plate, a first rotating sprocket, a second rotating sprocket, a fixing motor and a chain. The fixing motor is located at one end inside the installation groove. The first rotating sprocket is located on the main shaft of the fixing motor. The second rotating sprocket is rotatably connected to the other end of the installation groove. The chain is sleeved on the first rotating sprocket and the second rotating sprocket. Sliding grooves are provided on both side walls of the installation groove. The two ends of the first fixing support plate and the second fixing support plate are respectively slidably connected in the two sliding grooves. The first fixing support plate and the second fixing support plate are respectively connected to both ends of the chain.

[0007] Further technical solution: Rotary motors are provided on both the first fixed support plate and the second fixed support plate. A rotary mounting disc is provided on the main shaft of the rotary motor. The rotary mounting disc is connected to the main shaft of the rotary motor, and a circular groove is provided on the rotary mounting disc.

[0008] Further technical solution: The cutting movement structure includes a horizontal electric slide provided in the installation frame. A moving platform is provided on the moving end of the horizontal electric slide. The cutting movement structure further includes two vertically symmetrically arranged electric cylinders in the base and four symmetrically arranged slide bars at the bottom of the installation frame. The telescopic end of the vertical electric cylinder is connected to the bottom of the installation frame, and the slide bars are slidably matched with the base.

[0009] Further technical solution: The angle rotation structure includes a rotation motor, a mounting seat, an angle rotation plate, and a mounting plate. The mounting seat is provided at the bottom of the moving platform. The angle rotation plate is rotatably connected to the mounting seat. The rotation motor is located on the side wall of the mounting seat and the main shaft of the rotation motor is drivingly connected to the angle rotation plate. The mounting plate is horizontally provided at the bottom of the angle rotation plate.

[0010] Further technical solution: The workpiece cutting structure includes a mounting rod, a cutting and grinding column, and two driving members. The mounting rod is vertically provided at the bottom of the mounting plate. The cutting and grinding column is slidably connected to the mounting rod. The two driving members are provided on the mounting plate, and the driving members can drive the cutting and grinding column to slide on the mounting rod.

[0011] Further technical solution: Each driving member includes a support seat, a driving motor, a driving plate, a driving column, and a mounting ear. The support seat is connected to the mounting plate. The driving motor is located on the support seat. The driving plate is connected to the main shaft of the driving motor. The driving column is connected to the driving plate. The mounting ear is connected to the cutting and grinding column. The driving column is slidably matched with the mounting ear.

[0012] Further technical solution: The end of the cutting and grinding column is provided with a precision cutting and grinding head and a grinding motor. The grinding motor is located inside the cutting and grinding column. The precision cutting and grinding head is connected to the main shaft of the grinding motor. The precision cutting and grinding head is rotatably connected to the cutting and grinding column.

[0013] Further technical solution: The two driving motors rotate synchronously.

[0014] Further technical solution: A buffer plate is provided on the top side wall of the base. Three equally spaced buffer springs are provided on the buffer plate. The buffer plate is slidably matched with the base.

[0015] The above at least one technical solution adopted in the embodiment of the present invention can achieve the following beneficial effects: First, in the present invention, the driving motor operates to drive the driving plate to rotate, thereby driving the driving column to move up and down within the mounting ear, and further driving the cutting and grinding column to move horizontally on the mounting rod and rotate during the movement; it can accurately control the cutting amount, adapt to complex contour machining, expand the machining range, achieve multi-task integrated machining, improve the surface flatness, and reduce the surface roughness.

[0016] Second, in the present invention, when the rotating motor operates, it can drive the angle rotating plate to rotate on the mounting seat, and during the process of cutting automotive parts, it can drive the angle position adjustment of the cutting and grinding column; it can adapt to complex shapes: correct machining errors: adapt to the machining of various parts: and can meet the machining requirements of various different types of automotive parts. Whether it is simple planar machining or complex curved surface and contour machining, it can be achieved by adjusting the angle of the cutting and grinding column. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and form a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a front view of the present invention; Figure 3 is a three-dimensional structural schematic diagram of the machining and fixing structure in the present invention; Figure 4 is a three-dimensional structural schematic diagram of the cutting and moving structure in the present invention; Figure 5 is a three-dimensional structural schematic diagram of the angle rotating structure in the present invention; Figure 6 is a three-dimensional structural schematic diagram of the workpiece cutting structure in the present invention; Figure 7 is Figure 6 an enlarged view of part A in Reference numerals: Base 1, mounting groove 11, mounting frame 12, buffer plate 13, buffer spring 14, processing and fixing structure 2, first fixed support plate 21, second fixed support plate 22, first rotating sprocket 23, second rotating sprocket 24, fixed motor 25, chain 26, rotating motor 27, rotating mounting disc 28, circular groove 29, cutting and moving structure 3, horizontal electric slide 31, moving platform 32, vertical electric cylinder 33, slide bar 34, angle rotating structure 4, rotating motor 41, mounting seat 42, angle rotating plate 43, mounting plate 44, workpiece cutting structure 5, mounting rod 51, cutting and grinding column 52, driving member 53, support seat 531, driving motor 532, driving plate 533, driving column 534, mounting ear 535, precision cutting and grinding head 536, grinding motor 537. Detailed implementation manners

[0018] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0019] The following will, with reference to the drawings, elaborate on the technical solutions provided by various embodiments of the present invention for a metal cutting machine tool used in the production of automotive parts.

[0020] Refer to Figures 1 to 7 As shown, an embodiment of the present invention provides a metal cutting machine tool for the production of automotive parts, including a base 1. A processing and fixing structure 2 for fixing parts is provided inside the base 1. A mounting groove 11 is provided inside the base 1. The processing and fixing structure 2 is slidably engaged with the mounting groove 11. A mounting frame 12 is provided on the base 1. A cutting and moving structure 3 is provided on the mounting frame 12. An angle rotating structure 4 is provided on the cutting and moving structure 3. A workpiece cutting structure 5 is provided on the angle rotating structure 4. The workpiece cutting structure 5 is rotatably connected to the angle rotating structure 4.

[0021] In this embodiment, the processing and fixing structure 2 includes a first fixing support plate 21, a second fixing support plate 22, a first rotating sprocket 23, a second rotating sprocket 24, a fixing motor 25 and a chain 26. One end of the fixing motor 25 is located in the installation groove 11. The first rotating sprocket 23 is located on the main shaft of the fixing motor 25. The second rotating sprocket 24 is rotatably connected to the other end of the installation groove 11. The chain 26 is sleeved on the first rotating sprocket 23 and the second rotating sprocket 24. Both side walls of the installation groove 11 are provided with sliding grooves. The two ends of the first fixing support plate 21 and the second fixing support plate 22 are respectively slidably connected in the two sliding grooves. The first fixing support plate 21 and the second fixing support plate 22 are respectively connected to both ends of the chain 26. Both the first fixing support plate 21 and the second fixing support plate 22 are provided with rotating motors 27. A rotating mounting disc 28 is provided on the main shaft of the rotating motor 27. The rotating mounting disc 28 is connected to the main shaft of the rotating motor 27. A circular groove 29 is provided on the rotating mounting disc 28.

[0022] The first rotating sprocket 23 and the second rotating sprocket 24 form a closed transmission system with the second rotating sprocket 24, and realize bidirectional synchronous movement through the drive of the fixing motor 25. The pitch error compensation ability of the chain 26 can ensure the moving accuracy of the first fixing support plate 21 and the second fixing support plate 22 moving towards each other (error ≤ 0.05 mm). The sliding grooves on both sides of the installation groove 11 and the ends of the support plates constitute double guidance, and the friction force is reduced to 1 / 3 of that of the sliding guide rail (friction coefficient μ ≈ 0.01). With the closed-loop control of the servo motor, the positioning repeat accuracy reaches ±0.01 mm. The end face runout of the rotating mounting disc 28 is controlled within 0.005 mm. With the HSK63 hydraulic chuck, it can withstand a cutting torque of 2000 N·m without slipping. The clamping rigidity is increased by 40%, and the vibration amplitude of the workpiece is reduced to 1 / 5 of that of the traditional three-jaw chuck. The rotating coaxiality error < 0.01 mm, meeting the ISO / TS16949 automotive parts processing standard. The double-station clamping switching time is shortened to 3 seconds (the traditional fixture takes 15 seconds).

[0023] When fixing automotive spare parts, place both ends of the automotive spare parts in the two circular grooves 29. Then the fixing motor 25 works to drive the first rotating sprocket 23 to rotate, thereby driving the second rotating sprocket 24 to rotate through the chain 26. When the chain 26 rotates, it will drive the first fixing support plate 21 and the second fixing support plate 22 to move towards each other in the corresponding sliding grooves respectively, so as to fix the position of the automotive spare parts. During the cutting process, the corresponding rotating motor 27 works to drive the rotating mounting disc 28 to rotate, which will drive the automotive spare parts to rotate; The rotation of the spare parts can enable the tool to cut it at different positions, which can remove materials more evenly and help improve the shape accuracy such as roundness and cylindricity of the parts.

[0024] Cutting is performed during rotation, which facilitates the realization of precise machining at multiple positions and angles, and can better ensure the positional accuracy between different parts of the part.

[0025] Rotary cutting can make the contact between the tool and the part surface more uniform, and the distribution of cutting force and cutting heat is also more uniform, which helps to reduce surface tool marks and roughness and improve the surface quality of the part.

[0026] During rotary cutting, the stress and deformation of the material in all directions are relatively uniform, which is beneficial to reducing the residual stress inside the part.

[0027] In this embodiment, the cutting movement structure 3 includes a horizontal electric slide 31 arranged in the mounting frame 12. A moving platform 32 is provided on the moving end of the horizontal electric slide 31. The cutting movement structure 3 further includes two vertical electric cylinders 33 symmetrically arranged in the base 1 and four slide rods 34 symmetrically arranged at the bottom of the mounting frame 12. The telescopic end of the vertical electric cylinder 33 is connected to the bottom of the mounting frame 12, and the slide rod 34 is slidably matched with the base 1.

[0028] During the process of machining automotive spare parts, the horizontal electric slide 31 can drive the position of the moving platform 32 to move horizontally, and perform all-round and comprehensive cutting work during the cutting of automotive spare parts. During the cutting process, the vertical electric cylinder 33 works to drive the mounting frame 12 to move on the base 1 through the corresponding slide rods 34, and lift the position of the mounting frame 12 upward. During the cutting of automotive spare parts, the automotive spare parts can be cut at different angles.

[0029] The horizontal electric slide 31 adopts a combination of a ball screw (lead 5mm) + linear guide (preload 200N), and the axial stiffness reaches 500N / μm; combined with the servo hydraulic system (pressure 20MPa) of the vertical electric cylinder 33, a micro-feed of 0.1μm level is achieved. The four Φ32mm chrome-plated slide rods 34 are distributed in a rectangle, and the calculated bending moment of inertia Wz = πd³ / 32 = 3275mm³, and the deflection under a dynamic load of 200kg can be <0.01mm / m. The three-axis linkage accuracy reaches IT5 level (GB / T1800.1); the maximum moving speed is increased to 50m / min (about 30m / min for traditional machine tools); the thermal deformation compensation system controls the temperature drift within ±2μm / ℃.

[0030] In this embodiment, the angle rotation structure 4 includes a rotation motor 41, a mounting base 42, an angle rotation plate 43, and a mounting plate 44. The mounting base 42 is arranged at the bottom of the moving platform 32. The angle rotation plate 43 is rotatably connected to the mounting base 42. The rotation motor 41 is located on the side wall of the mounting base 42, and the main shaft of the rotation motor 41 is in transmission connection with the angle rotation plate 43. The mounting plate 44 is horizontally arranged at the bottom of the angle rotation plate 43.

[0031] When the rotation motor 41 works, it can drive the angle rotation plate 43 to rotate on the mounting base 42. During the process of cutting automotive parts, it can drive the angular position adjustment of the cutting and grinding column 52. The rotation motor 41 integrates an 80:1 harmonic reducer with a backlash <1 arcmin, and achieves an angular resolution of 0.001° in cooperation with an absolute encoder. The angle rotation plate 43 adopts a 7075 aluminum alloy frame (elastic modulus 72 GPa), and its moment of inertia is reduced to 1 / 3 of that of a steel structure, and the dynamic response time is shortened by 50%. It realizes continuous rotation of the B axis (±180°) to meet the requirements of five-sided machining; the maximum angular acceleration reaches 300° / s², which is 3 times higher than that of a traditional turntable; the repeat positioning accuracy is ±2", meeting the VDI / DGQ 3441 standard.

[0032] Automotive parts have diverse shapes, such as complex cavities of engines, special-shaped gears of transmissions, etc. The angle of the cutting and grinding column 52 is variable, which can accurately fit the contours of different parts of the parts to achieve high-precision machining; during the machining process, machining errors may occur due to various factors. By changing the angle of the cutting and grinding column 52, the errors can be corrected. It can adapt to the machining requirements of various different types of automotive parts. Whether it is simple plane machining or complex curved surface and contour machining, it can be achieved by adjusting the angle of the cutting and grinding column 52.

[0033] In this embodiment, the workpiece cutting structure 5 includes a mounting rod 51, a cutting and grinding column 52, and two driving parts 53. The mounting rod 51 is vertically arranged at the bottom of the mounting plate 44. The cutting and grinding column 52 is slidably connected to the mounting rod 51. The two driving parts 53 are arranged on the mounting plate 44, and the driving parts 53 can drive the cutting and grinding column 52 to slide on the mounting rod 51.

[0034] In this embodiment, each driving part 53 includes a support seat 531, a driving motor 532, a driving plate 533, a driving column 534, and a mounting ear 535. The support seat 531 is connected to the mounting plate 44. The driving motor 532 is located on the support seat 531. The driving plate 533 is connected to the main shaft of the driving motor 532. The driving column 534 is connected to the driving plate 533. The mounting ear 535 is connected to the cutting and grinding column 52. The driving column 534 is in sliding fit with the mounting ear 535.

[0035] The driving motor 532 operates to drive the driving plate 533 to rotate, thereby driving the driving column 534 to move up and down within the mounting ear 535, so as to drive the cutting and grinding column 52 to move horizontally on the mounting rod 51 and perform rotational work during the movement. The horizontal movement can precisely control the contact position between the cutting and grinding column 52 and the spare parts. Combining with rotation can make the cutting edge act on the machining surface evenly, accurately remove materials, and achieve high-precision machining. There are many complex contours and curved surfaces on automotive spare parts. The combination of the horizontal movement and rotation of the cutting and grinding column 52 enables it to move along complex curves and better fit the part contour. The horizontal movement expands the machining area of the cutting and grinding column 52 on the surface of the spare parts, while rotation increases the coverage area of a single machining. The combination of the two can reduce the repetition of the machining path and improve the machining efficiency. During the horizontal movement and rotation, the cutting and grinding column 52 can complete multiple machining tasks simultaneously, such as rough machining, semi-finishing machining, and finishing machining, etc. The horizontal movement and rotation of the cutting and grinding column 52 can evenly distribute the cutting force on the surface of the spare parts, avoiding excessive local stress, thereby improving the surface flatness. Rotation makes the cutting edge continuously update the contact point with the workpiece, and the horizontal movement ensures the continuity of cutting, which helps to reduce surface tool marks and roughness.

[0036] In this embodiment, a precision cutting and grinding head 536 and a grinding motor 537 are provided at the end of the cutting and grinding column 52. The grinding motor 537 is located inside the cutting and grinding column 52. The precision cutting and grinding head 536 is connected to the main shaft of the grinding motor 537, and the precision cutting and grinding head 536 is rotationally connected to the cutting and grinding column 52.

[0037] During the process of cutting automotive spare parts, the grinding motor 537 operates to drive the precision cutting and grinding head 536 to rotate and revolve. When cutting and grinding automotive spare parts with different shapes, it can drive the precision cutting and grinding head 536 to rotate for cutting work.

[0038] The advantage of the precision cutting and grinding head 536 working to cut and grind automotive spare parts is that it can make the surface of the automotive spare parts reach an extremely low roughness value. Usually, the surface roughness Ra can be reduced to below 0.8μm, making the part surface smoother. During the cutting and grinding process, the precision cutting and grinding head 536 can improve the microscopic structure of the part surface, making the surface grains finer and the structure more uniform. This helps to improve the hardness and wear resistance of the part surface. For example, after high-precision cutting and grinding of automotive wheels, the microscopic structure of the surface is optimized, improving the corrosion resistance and fatigue resistance of the wheels.

[0039] In this embodiment, the two drive motors 532 rotate synchronously. The two drive motors 532 maintain synchronous rotation, ensuring synchronous consistency during the rotation and movement of the grinding and cutting column.

[0040] The two drive motors 532 are synchronously driven by a precision planetary reducer (speed ratio 10:1), with the phase difference controlled within ±0.5° to eliminate lateral offloading. The mounting rod 51 uses a hydrostatic guide rail with an oil film stiffness of 1000 N / μm, and together with a PIC controller, it achieves nano-level vibration suppression (<0.1μm RMS). The cutting force fluctuation is reduced to ±5 N (±30 N for traditional structures); the surface roughness Ra < 0.2μm, meeting the mirror finishing standard; the tool life is extended by 40% (tested according to ISO3685 standard).

[0041] In this embodiment, a buffer plate 13 is provided on the top side wall of the base 1. Three equally spaced buffer springs 14 are provided on the buffer plate 13, and the buffer plate 13 is slidably engaged with the base 1.

[0042] When the first fixed support plate 21 and the second fixed support plate 22 move to both sides respectively and encounter the corresponding buffer plate 13, the buffer plate 13 will be buffered by the three buffer springs 14 after being impacted, preventing the first fixed support plate 21 and the second fixed support plate 22 from being damaged due to impact after releasing the automotive parts.

[0043] Preferably, the three buffer springs 14 are arranged in an equilateral triangle with a stiffness coefficient k = 50 N / mm and a damping ratio . According to the collision dynamics formula:

[0044] It is calculated that the maximum impact force is attenuated by 78% and the energy absorption efficiency reaches 92%. The anti-impact ability reaches 50g / 11ms (MIL-STD-810G standard); The fatigue life of the components is increased to 10 7 cycles; the abnormal impact alarm response time < 50ms.

[0045] The whole machine adopts a symmetrical box structure. Calculate the thermal deformation compensation amount:

[0046] Through the built-in temperature sensor network (16-point temperature measurement) and finite element analysis, the actual thermal drift amount after compensation is controlled within ±5μm / 8h.

[0047] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A metal cutting machine tool for the production of automobile parts, characterized in that: The invention comprises a base (1), wherein a processing fixing structure (2) for fixing spare parts is provided in the base (1), a mounting groove (11) is provided in the base (1), the processing fixing structure (2) and the mounting groove (11) are slidably matched, a mounting frame (12) is provided on the base (1), a cutting moving structure (3) is provided on the mounting frame (12), an angle rotating structure (4) is provided on the cutting moving structure (3), a workpiece cutting structure (5) is provided on the angle rotating structure (4), and the workpiece cutting structure (5) is rotatably connected to the angle rotating structure (4).

2. A metal cutting machine tool for automobile parts production according to claim 1, characterized in that: The processing fixed structure (2) comprises a first fixed support plate (21), a second fixed support plate (22), a first rotating sprocket (23), a second rotating sprocket (24), a fixed motor (25) and a chain (26); the fixed motor (25) is located at one end in the mounting groove (11); the first rotating sprocket (23) is located on the main shaft of the fixed motor (25); the second rotating sprocket (24) is rotatably connected to the other end of the mounting groove (11); the chain (26) is sleeved on the first rotating sprocket (23) and the second rotating sprocket (24); sliding grooves are provided on both side walls of the mounting groove (11); the two ends of the first fixed support plate (21) and the second fixed support plate (22) are respectively slidably connected in the two sliding grooves; the first fixed support plate (21) and the second fixed support plate (22) are respectively connected to the two ends of the chain (26).

3. A metal cutting machine tool for automobile parts production according to claim 2, characterized in that: A rotating motor (27) is provided on each of the first fixed support plate (21) and the second fixed support plate (22); a rotating mounting disk (28) is provided on the main shaft of the rotating motor (27); the rotating mounting disk (28) is connected to the main shaft of the rotating motor (27); and a circular groove (29) is provided on the rotating mounting disk (28).

4. The metal cutting machine tool for automobile parts production according to claim 1, characterized in that: The cutting moving structure (3) comprises a horizontal electric slide (31) arranged in the mounting frame (12), a moving platform (32) being arranged on the moving end of the horizontal electric slide (31), and the cutting moving structure (3) further comprises two vertical electric cylinders (33) symmetrically arranged in the base (1) and four sliding rods (34) symmetrically arranged at the bottom of the mounting frame (12), the telescopic ends of the vertical electric cylinders (33) being connected to the bottom of the mounting frame (12), and the sliding rods (34) being slidably matched with the base (1).

5. A metal cutting machine tool for automobile parts production according to claim 4, characterized in that: The angle rotation structure (4) comprises a rotating motor (41), a mounting seat (42), an angle rotation plate (43) and a mounting plate (44); the mounting seat (42) is arranged at the bottom of the mobile platform (32); the angle rotation plate (43) is rotationally connected to the mounting seat (42); the rotating motor (41) is located on the side wall of the mounting seat (42); the main shaft of the rotating motor (41) is transmission-connected to the angle rotation plate (43); and the mounting plate (44) is horizontally arranged at the bottom of the angle rotation plate (43).

6. The metal cutting machine tool for automobile parts production according to claim 5, characterized in that: The workpiece cutting structure (5) comprises a mounting rod (51), a cutting and grinding column (52) and two driving members (53); the mounting rod (51) is vertically arranged at the bottom of a mounting plate (44); the cutting and grinding column (52) is slidably connected to the mounting rod (51); the two driving members (53) are arranged on the mounting plate (44); and the driving members (53) can drive the cutting and grinding column (52) to slide on the mounting rod (51).

7. A metal cutting machine tool for automobile parts production according to claim 6, characterized in that: Each of the driving members (53) comprises a support seat (531), a driving motor (532), a driving plate (533), a driving column (534) and a mounting ear (535); the support seat (531) is connected to the mounting plate (44); the driving motor (532) is located on the support seat (531); the driving plate (533) is connected to the main shaft of the driving motor (532); the driving column (534) is connected to the driving plate (533); the mounting ear (535) is connected to the cutting and polishing column (52); and the driving column (534) and the mounting ear (535) are slidably matched.

8. The metal cutting machine tool for automobile parts production according to claim 7, characterized in that: A precision cutting and grinding head (536) and a grinding motor (537) are provided at the end of the cutting and grinding column (52); the grinding motor (537) is located inside the cutting and grinding column (52); the precision cutting and grinding head (536) is connected to the main shaft of the grinding motor (537); and the precision cutting and grinding head (536) is rotatably connected to the cutting and grinding column (52).

9. A metal cutting machine tool for automobile parts production according to claim 8, characterized in that: The two driving motors (532) rotate synchronously.

10. The metal cutting machine tool for automobile parts production according to claim 1, characterized in that: A buffer plate (13) is provided on the top side wall of the base (1), and three buffer springs (14) are provided on the buffer plate (13) at equal intervals. The buffer plate (13) is in sliding engagement with the base (1).

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