Automatic grinding machine tool for machining mechanical parts

Abstract

The invention relates to the technical field of grinding equipment, in particular to an automatic grinding machine tool for machining mechanical parts, which comprises a worktable and a tubular workpiece, a vertical plate is arranged on the worktable, the bottom of the vertical plate is slidably connected with the worktable, a cross rod is connected to one side of the top of the vertical plate, and a first grinding head is connected to one side, away from the vertical plate, of the cross rod; a vertical rod is arranged above the end, away from the vertical plate, of the transverse rod, and a second grinding head is arranged on the vertical rod. By arranging a first grinding head, a second grinding head, an air pipe and an air hole, an air pump inflates air between a conical block and a fixing plate through the air pipe and the air hole, after certain air exists between the conical block and the fixing plate, the conical block moves in the direction away from the fixing plate under the action of air pressure, and the tip end of the conical block pushes a sliding plate to move; the grinding block moves in the direction away from the center of the inner cylinder along with the sliding plate, so that the position of the grinding block is adjusted, the grinding block can make better contact with the tubular workpieces, and the grinding device can adapt to the tubular workpieces with different diameters.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, in particular to an automatic grinding machine tool for machining mechanical parts. Background Art

[0002] Grinding usually refers to using a rough surface to stick to the surface of the object to be polished, and rubbing it back and forth to make the surface of the object smooth; the grinding equipment used on sheet metal materials is generally a grinding machine tool.

[0003] Ordinary grinding machines have difficulty in grinding the inner wall of tubular workpieces, and ordinary grinding machines can only grind one point at a time. When the area of ​​the tubular workpiece to be ground is large, the grinding speed is slow and the efficiency is low. When grinding tubular workpieces of different lengths, the grinding head needs to be replaced or adjusted, which is complicated and inconvenient. Summary of the invention

[0004] The purpose of the present invention is to provide an automated grinding machine for machining mechanical parts, so as to solve the problems that when the area of ​​a tubular workpiece to be ground is large, the grinding speed is slow and the efficiency is low, and when grinding tubular workpieces of different lengths, the grinding head needs to be replaced or adjusted, which makes the operation complicated and inconvenient.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An automated grinding machine for machining mechanical parts comprises a workbench and a tubular workpiece, wherein a vertical plate is arranged on the workbench, the bottom of the vertical plate is slidably connected to the workbench, a cross bar is connected to one side of the top of the vertical plate, a first grinding head is connected to the side of the cross bar away from the vertical plate, a vertical pole is arranged above an end of the cross bar away from the vertical plate, the bottom of the vertical pole is connected to the cross bar, a second grinding head is arranged on the vertical pole, the second grinding head is rotatably connected to the vertical pole, a chuck is rotatably mounted on one side of the workbench, the tubular workpiece is fixed on the chuck, and grinding blocks are arranged on the first grinding head and the second grinding head.

[0007] Preferably, a slide groove is provided on the workbench along the axial direction of the tubular workpiece, a slider is slidably installed in the slide groove, and the top of the slider is fixedly connected to the bottom of the vertical plate.

[0008] Preferably, a first motor is provided on a side of the vertical plate away from the first grinding head, the first motor housing is fixedly connected to the vertical plate, and the output shaft of the first motor passes through the vertical plate and is rotatably connected to the vertical plate.

[0009] Preferably, a slot is opened in the vertical pole in the horizontal direction, a pin hole is opened in the slot, a pin column is opened in the pin hole, a through slot is opened on the pin column, a sleeve rod is opened above the cross bar, one end of the sleeve rod is connected to the second grinding head, and the other end is provided with a second motor, the output end of the second motor is fixedly connected to a rotating shaft, the other end of the rotating shaft passes through the through slot and is connected to the second grinding head, and the second motor housing is connected to the sleeve rod.

[0010] Preferably, an electric push rod is provided at the bottom of the sleeve rod, a hook is provided at the top of the electric push rod, a movable rod is provided at the bottom of the sleeve rod, the movable rod can slide to one side through the pull rod, and the hook at the top of the electric push rod can hook the movable rod.

[0011] Preferably, the first grinding head is provided with a male end at one end and a female end at the other end, both the male end and the female end are provided with threaded holes, the male end can be inserted into the female end, a fastening bolt is provided in the threaded hole, and the male end and the female end can be fixed by the fastening bolt.

[0012] Preferably, an inner cylinder is provided inside the first grinding head, and the inner cylinder is fixedly connected to the inner wall of the first grinding head through a plurality of connecting blocks, and a sliding plate is provided inside the grinding block, and the sliding plate passes through the inner cylinder and is slidably connected to the inner cylinder.

[0013] Preferably, fixed plates are provided at both ends of the inner cylinder, a conical block is provided on one side of the fixed plate, the base of the conical block is a piston, which can move along the axial direction of the inner cylinder, an air hole is provided between the conical block and the fixed plate, the tip of the conical block can contact the sliding plate, an air cavity is provided between the inner cylinder and the first grinding head, and the air cavities between the multiple first grinding heads are connected by air pipes.

[0014] Preferably, a plurality of air holes are provided on the outer side of the first grinding head, and the air holes are connected to the air cavity through an air valve, and the first grinding head and the second grinding head have exactly the same structure.

[0015] Beneficial effects of the present invention:

[0016] 1. An automated grinding machine for machining mechanical parts described in the present invention comprises a first grinding head, a second grinding head, an air pipe and an air hole. When the grinding blocks of the first grinding head and the second grinding head cannot just contact the tubular workpiece, an air pump fills gas into the space between the conical block and the fixed plate through the air pipe and the air hole. An air valve is provided in the air hole. The air holes on the first grinding head and the second grinding head are closed, and the air holes on the inner cylinder are opened. After there is a certain amount of gas between the conical block and the fixed plate, the conical block moves away from the fixed plate under the action of air pressure, and the tip of the conical block pushes the sliding plate to move. The grinding block follows the sliding plate to move away from the center of the inner cylinder, thereby adjusting the position of the grinding block so that the grinding block can better contact the tubular workpiece, and the grinding efficiency is higher, and it can adapt to tubular workpieces of different diameters.

[0017] 2. The automated grinding machine for machining mechanical parts described in the present invention fills different volumes of gas into the space between the conical block and the fixed plate in sequence, so that the distance the conical block moves is gradually increased or decreased, thereby gradually increasing or decreasing the spacing between the grinding block and the inner tube, so that a plurality of grinding blocks form an inclined surface. When the caliber of a tubular workpiece is gradually changing, efficient grinding can be performed using the grinding blocks that form the inclined surface.

[0018] 3. The automated grinding machine tool for machining mechanical parts described in the present invention can drive the rotating shaft to rotate through the second motor, thereby driving the second grinding head to rotate. When the electric push rod is raised or lowered, one end of the sleeve rod is driven to move up and down through the movable rod and the hook on the electric push rod. The sleeve rod rotates a certain angle along the pin column, and the second grinding head moves with the sleeve rod and the rotating shaft, so that the angle of the second grinding head can be adjusted. The second grinding head rotates driven by the second motor and the rotating shaft to perform fine grinding on the angle of the tubular workpiece. A plurality of pin holes and slots are provided on the vertical pole, and the position of the second grinding head can be adjusted by installing it in different slots, so as to adapt to tubular workpieces of different diameters.

[0019] 4. The automated grinding machine tool for machining mechanical parts described in the present invention has the same male end and female end on both the first grinding head and the second grinding head. The grinding range of the grinding block can be adjusted by installing multiple first grinding heads and second grinding heads to adapt to tubular workpieces of different lengths.

[0020] 5. The automated grinding machine tool for machining mechanical parts described in the present invention, after gas is filled between the conical block and the fixed plate, the air valve on the inner cylinder is closed to keep the conical block stationary, and then the air valves of the air holes on the first grinding head and the second grinding head are opened, and air is blown by an external air pump to clean the grinding area. Cleaning during the grinding process can avoid excessive dust accumulation on the tubular workpiece and reduce the subsequent cleaning workload of the tubular workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the position of the slide block of the slide groove shown in the present invention.

[0024] Figure 3 This is a schematic diagram of the position of the first grinding head shown in the present invention.

[0025] Figure 4 As shown in the present invention Figure 3 A magnified schematic diagram of part A.

[0026] Figure 5 As shown in the present invention Figure 3 An enlarged schematic diagram of part B.

[0027] Figure 6 It is a schematic structural diagram of the first grinding head shown in the present invention.

[0028] Figure 7 It is a cross-sectional view of the first grinding head shown in the present invention.

[0029] Figure 8 It is a schematic diagram of the internal structure of the first grinding head shown in the present invention.

[0030] Fig. 9 It is a structural schematic diagram of the sliding plate shown in the present invention.

[0031] Fig.10 It is a schematic structural diagram of the pin shown in the present invention.

[0032] In the figure: 1. workbench; 2. vertical plate; 3. slide groove; 4. slider; 5. cross bar; 6. vertical rod; 7. first grinding head; 8. second grinding head; 9. sleeve rod; 10. first motor; 11. second motor; 12. rotating shaft; 13. pin; 14. slot; 15. pin hole; 16. electric push rod; 17. movable rod; 18. pull rod; 19. female end; 20. male end; 21. threaded hole; 22. air pipe; 23. grinding block; 24. inner tube; 25. fastening bolt; 26. connecting block; 27. fixing plate; 28. air hole; 29. ​​sliding plate; 30. conical block; 31. air cavity; 32. through groove; 33. chuck; 34. tubular workpiece. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figure 1-Figure 10As shown, an automatic grinding machine tool for machining mechanical parts described in the present invention comprises a workbench 1 and a tubular workpiece 34, a vertical plate 2 is provided on the workbench 1, the bottom of the vertical plate 2 is slidably connected to the workbench 1, a cross bar 5 is connected to one side of the top of the vertical plate 2, a first grinding head 7 is connected to the side of the cross bar 5 away from the vertical plate 2, a vertical pole 6 is provided above the end of the cross bar 5 away from the vertical plate 2, the bottom of the vertical pole 6 is connected to the cross bar 5, a second grinding head 8 is provided on the vertical pole 6, and the second grinding head 8 is rotatably connected to the vertical pole 6, a chuck 33 is rotatably installed on one side of the workbench 1, the tubular workpiece 34 is fixed on the chuck 33, and grinding blocks 23 are provided on both the first grinding head 7 and the second grinding head 8. The chuck 33 can drive the tubular workpiece 34 to rotate, and then the slider 4 slides in the slide groove 3, driving the vertical plate 2 to move, thereby driving the first grinding head 7 and the second grinding head 8 to move. The first grinding head 7 and the second grinding head 8 contact with the rotating tubular workpiece 34 for grinding. There is a certain distance between the first grinding head 7 and the second grinding head 8. During grinding, the first grinding head 7 can grind the inner wall of the tubular workpiece 34, and the second grinding head 8 grinds the outer wall of the tubular workpiece 34. The inside and outside are ground at the same time, which is more efficient.

[0035] As a technical optimization solution of the present invention, a slide groove 3 is opened on the workbench 1 along the axial direction of the tubular workpiece 34, and a slider 4 is slidably installed in the slide groove 3, and the top of the slider 4 is fixedly connected to the bottom of the vertical plate 2.

[0036] As a technical optimization solution of the present invention, a first motor 10 is provided on a side of the vertical plate 2 away from the first grinding head 7, the housing of the first motor 10 is fixedly connected to the vertical plate 2, and the output shaft of the first motor 10 passes through the vertical plate 2 and is rotatably connected to the vertical plate 2. The first motor 10 can drive the crossbar 5 to rotate, the first grinding head 7 rotates coaxially with the crossbar 5, and the second grinding head 8 rotates along the axis of the first grinding head 7, thereby adjusting the contact position of the tubular workpiece 34 with the first grinding head 7 and the second grinding head 8, so that the grinding block 23 with the highest grinding efficiency contacts the tubular workpiece 34.

[0037] As a technical optimization scheme of the present invention, a slot 14 is opened in the horizontal direction in the vertical pole 6, a pin hole 15 is opened in the slot 14, a pin column 13 is opened in the pin hole 15, a through slot 32 is opened on the pin column 13, a sleeve rod 9 is opened above the cross bar 5, one end of the sleeve rod 9 is connected to the second grinding head 8, and the other end is provided with a second motor 11, the output end of the second motor 11 is fixedly connected with a rotating shaft 12, the other end of the rotating shaft 12 passes through the through slot 32 and is connected to the second grinding head 8, and the housing of the second motor 11 is connected to the sleeve rod 9. The air pipes 22 at the ends of the first grinding head 7 and the second grinding head 8 are both connected to an air pump. The first grinding head 7 is fixed to the cross bar 5 through the corresponding threaded holes 21, and the second grinding head 8 is fixed to the rotating shaft 12 through the corresponding threaded holes 21. A magnetic block is provided at the end of the pin 13, and a magnetic block is also provided at the corresponding position of the vertical rod 6, so that the pin 13 is fixed after the pin 13 is inserted. A through groove 32 is opened on the pin 13. When the pin 13 is inserted, the rotating shaft 12 is located at the through groove 32, and the pin 13 will not affect the rotation of the rotating shaft 12

[0038] As a technical optimization scheme of the present invention, an electric push rod 16 is provided at the bottom of the sleeve rod 9, a hook is provided at the top of the electric push rod 16, and a movable rod 17 is provided at the bottom of the sleeve rod 9. The movable rod 17 can slide to one side through the pull rod 18, and the hook at the top of the electric push rod 16 can hook the movable rod 17. The second motor 11 can drive the rotating shaft 12 to rotate, thereby driving the second grinding head 8 to rotate. When the electric push rod 16 is raised or lowered, one end of the sleeve rod 9 is driven to move up and down through the movable rod 17 and the hook on the electric push rod 16. The sleeve rod 9 rotates a certain angle along the pin 13, and the second grinding head 8 moves with the sleeve rod 9 and the rotating shaft 12, so that the angle of the second grinding head 8 can be adjusted. The second grinding head 8 rotates under the drive of the second motor 11 and the rotating shaft 12, and fine grinding is performed on the angle of the tubular workpiece 34; a plurality of pin holes 15 and card slots 14 are provided on the vertical rod 6, and the position of the second grinding head 8 can be adjusted by installing it in different card slots 14, so as to adapt to tubular workpieces 34 of different diameters.

[0039] As a technical optimization solution of the present invention, the first grinding head 7 is provided with a male end 20 at one end and a female end 19 at the other end. Both the male end 20 and the female end 19 are provided with threaded holes 21. The male end 20 can be inserted into the female end 19. The threaded holes 21 are provided with fastening bolts 25. The male end 20 and the female end 19 can be fixed by the fastening bolts 25. The first grinding head 7 and the second grinding head 8 are both provided with the same male end 20 and female end 19. The grinding range of the grinding block 23 can be adjusted by installing multiple first grinding heads 7 and second grinding heads 8, so as to adapt to tubular workpieces 34 of different lengths.

[0040] As a technical optimization solution of the present invention, an inner cylinder 24 is provided inside the first grinding head 7, and the inner cylinder 24 is fixedly connected to the inner wall of the first grinding head 7 through a plurality of connecting blocks 26. A sliding plate 29 is provided on the inner side of the grinding block 23, and the sliding plate 29 passes through the inner cylinder 24 and is slidably connected to the inner cylinder 24.

[0041] As a technical optimization solution of the present invention, fixed plates 27 are provided at both ends of the inner cylinder 24, and a conical block 30 is provided on one side of the fixed plate 27. The base of the conical block 30 is a piston, which can move along the axial direction of the inner cylinder 24. An air hole 28 is provided between the conical block 30 and the fixed plate 27. The tip of the conical block 30 can contact the sliding plate 29. An air cavity 31 is provided between the inner cylinder 24 and the first grinding head 7, and the air cavities 31 between multiple first grinding heads 7 are connected through an air pipe 22. When the grinding blocks 23 of the first grinding head 7 and the second grinding head 8 cannot just contact with the tubular workpiece 34, an external air pump fills air between the conical block 30 and the fixed plate 27 through the air pipe 22 and the air hole 28, and an air valve is provided in the air hole 28. The air holes 28 on the first grinding head 7 and the second grinding head 8 are closed, and the air holes 28 on the inner cylinder 24 are opened. When there is a certain amount of air between the conical block 30 and the fixed plate 27, under the action of air pressure, the conical block 30 moves away from the fixed plate 27, and the tip of the conical block 30 pushes the sliding plate 29 to move, and the grinding block 23 follows the sliding plate 29 to move away from the center of the inner cylinder 24 The grinding block 23 moves in the direction of rotation, thereby adjusting the position of the grinding block 23, so that the grinding block 23 can better contact with the tubular workpiece 34, the grinding efficiency is higher, and the tubular workpieces 34 with different diameters can be adapted; when the gas is filled between the conical block 30 and the fixed plate 27, the air valve on the inner cylinder 24 is closed to keep the conical block 30 stationary, and then the air valves of the air holes 28 on the first grinding head 7 and the second grinding head 8 are opened, and the grinding area can be cleaned by blowing air through an external air pump. Cleaning during the grinding process can avoid excessive dust accumulation on the tubular workpiece 34, thereby reducing the subsequent cleaning workload of the tubular workpiece 34.

[0042] As a technical optimization solution of the present invention, a plurality of air holes 28 are provided on the outer side of the first grinding head 7, and the air holes 28 are connected to the air cavity 31 through an air valve. The first grinding head 7 and the second grinding head 8 have exactly the same structure.

[0043] Working principle: When in use, first fix the tubular workpiece 34 on the chuck 33, the chuck 33 can drive the tubular workpiece 34 to rotate, and then the slider 4 slides in the slide groove 3, driving the vertical plate 2 to move, thereby driving the first grinding head 7 and the second grinding head 8 to move, and the first grinding head 7 and the second grinding head 8 contact with the rotating tubular workpiece 34 for grinding.

[0044] There is a certain distance between the first grinding head 7 and the second grinding head 8. During grinding, the first grinding head 7 can grind the inner wall of the tubular workpiece 34, and the second grinding head 8 can grind the outer wall of the tubular workpiece 34. The inside and outside can be ground simultaneously, which is more efficient.

[0045] The air pipes 22 at the ends of the first grinding head 7 and the second grinding head 8 are both externally connected to an air pump. The first grinding head 7 is fixed to the cross bar 5 through the corresponding threaded holes 21, and the second grinding head 8 is fixed to the rotating shaft 12 through the corresponding threaded holes 21. A magnetic block is provided at the end of the pin 13, and a magnetic block is also provided at the corresponding position of the vertical rod 6, so that the pin 13 is fixed after the pin 13 is inserted. A through groove 32 is opened on the pin 13. When the pin 13 is inserted, the rotating shaft 12 is located at the through groove 32, and the pin 13 will not affect the rotation of the rotating shaft 12;

[0046] When the grinding blocks 23 of the first grinding head 7 and the second grinding head 8 cannot just contact the tubular workpiece 34, an external air pump fills gas between the conical block 30 and the fixed plate 27 through the air pipe 22 and the air hole 28, and an air valve is provided in the air hole 28. The air holes 28 on the first grinding head 7 and the second grinding head 8 are closed, and the air holes 28 on the inner cylinder 24 are opened. When there is a certain amount of gas between the conical block 30 and the fixed plate 27, under the action of air pressure, the conical block 30 moves away from the fixed plate 27, and the tip of the conical block 30 pushes the sliding plate 29 to move, and the grinding block 23 follows the sliding plate 29 to move away from the center of the inner cylinder 24, thereby adjusting the position of the grinding block 23 so that the grinding block 23 can better contact the tubular workpiece 34, with higher grinding efficiency, and can adapt to tubular workpieces 34 of different diameters.

[0047] By filling different volumes of gas between the conical block 30 and the fixed plate 27 in sequence, the moving distance of the conical block 30 is gradually increased or decreased, so that the distance between the grinding block 23 and the inner cylinder 24 is gradually increased or decreased, so that multiple grinding blocks 23 form an inclined surface. When the diameter of the tubular workpiece 34 is gradually changed, efficient grinding can be performed using the grinding blocks 23 that form the inclined surface.

[0048] The second motor 11 can drive the rotating shaft 12 to rotate, thereby driving the second grinding head 8 to rotate. When the electric push rod 16 is raised or lowered, the movable rod 17 and the hook on the electric push rod 16 drive one end of the sleeve rod 9 to move up and down. The sleeve rod 9 rotates a certain angle along the pin 13, and the second grinding head 8 moves with the sleeve rod 9 and the rotating shaft 12, so that the angle of the second grinding head 8 can be adjusted. The second grinding head 8 rotates driven by the second motor 11 and the rotating shaft 12 to perform fine grinding on the angle of the tubular workpiece 34; a plurality of pin holes 15 and card slots 14 are provided on the vertical rod 6. The position of the second grinding head 8 can be adjusted by installing it in different card slots 14, so as to adapt to tubular workpieces 34 of different diameters.

[0049] The first grinding head 7 and the second grinding head 8 are both provided with the same male end 20 and female end 19 . The grinding range of the grinding block 23 can be adjusted by installing a plurality of first grinding heads 7 and second grinding heads 8 , so as to adapt to tubular workpieces 34 of different lengths.

[0050] After gas is filled between the conical block 30 and the fixed plate 27, the air valve on the inner cylinder 24 is closed to keep the conical block 30 stationary, and then the air valves of the air holes 28 on the first grinding head 7 and the second grinding head 8 are opened, and the grinding area can be cleaned by blowing air through an external air pump. Cleaning during the grinding process can avoid excessive dust accumulation on the tubular workpiece 34 and reduce the subsequent cleaning workload of the tubular workpiece 34.

[0051] The first motor 10 can drive the cross bar 5 to rotate, the first grinding head 7 rotates coaxially with the cross bar 5, and the second grinding head 8 rotates along the axis of the first grinding head 7, thereby adjusting the contact position of the tubular workpiece 34 with the first grinding head 7 and the second grinding head 8, so that the grinding block 23 with the highest grinding efficiency contacts the tubular workpiece 34.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automated grinding machine tool for machining mechanical parts, comprising a workbench (1) and a tubular workpiece (34), characterized in that: The workbench (1) is provided with a vertical plate (2), the bottom of the vertical plate (2) is slidably connected to the workbench (1), a cross bar (5) is connected to one side of the top of the vertical plate (2), a first grinding head (7) is connected to the side of the cross bar (5) away from the vertical plate (2), a vertical rod (6) is provided above the end of the cross bar (5) away from the vertical plate (2), the bottom of the vertical rod (6) is connected to the cross bar (5), a second grinding head (8) is provided on the vertical rod (6), and the second grinding head (8) is rotatably connected to the vertical rod (6), a chuck (33) is rotatably mounted on one side of the workbench (1), a tubular workpiece (34) is fixed on the chuck (33), and a grinding block (23) is provided on both the first grinding head (7) and the second grinding head (8).

2. The automatic grinding machine tool for machining mechanical parts according to claim 1, characterized in that: The workbench (1) is provided with a slide groove (3) along the axial direction of the tubular workpiece (34), a slider (4) is slidably installed in the slide groove (3), and the top of the slider (4) is fixedly connected to the bottom of the vertical plate (2).

3. The automatic grinding machine tool for machining mechanical parts according to claim 1, characterized in that: A first motor (10) is provided on a side of the vertical plate (2) away from the first grinding head (7); a housing of the first motor (10) is fixedly connected to the vertical plate (2); an output shaft of the first motor (10) passes through the vertical plate (2) and is rotationally connected to the vertical plate (2).

4. The automatic grinding machine tool for machining mechanical parts according to claim 3, characterized in that: A slot (14) is provided in the vertical rod (6) along the horizontal direction, a pin hole (15) is provided in the slot (14), a pin column (13) is provided in the pin hole (15), a through slot (32) is provided on the pin column (13), a sleeve rod (9) is provided above the cross rod (5), one end of the sleeve rod (9) is connected to the second grinding head (8), and the other end is provided with a second motor (11), the output end of the second motor (11) is fixedly connected to a rotating shaft (12), the other end of the rotating shaft (12) passes through the through slot (32) and is connected to the second grinding head (8), and the housing of the second motor (11) is connected to the sleeve rod (9).

5. The automatic grinding machine tool for machining mechanical parts according to claim (4), characterized in that: An electric push rod (16) is provided at the bottom of the sleeve rod (9), a hook is provided at the top of the electric push rod (16), a movable rod (17) is provided at the bottom of the sleeve rod (9), the movable rod (17) can slide to one side through a pull rod (18), and the hook at the top of the electric push rod (16) can hook the movable rod (17).

6. The automatic grinding machine tool for machining mechanical parts according to claim 1, characterized in that: The first grinding head (7) is provided with a male end (20) at one end and a female end (19) at the other end. Both the male end (20) and the female end (19) are provided with threaded holes (21). The male end (20) can be inserted into the female end (19). A fastening bolt (25) is provided in the threaded hole (21). The male end (20) and the female end (19) can be fixed by the fastening bolt (25).

7. The automatic grinding machine tool for machining mechanical parts according to claim 6, characterized in that: An inner cylinder (24) is provided inside the first grinding head (7), and the inner cylinder (24) is fixedly connected to the inner wall of the first grinding head (7) through a plurality of connecting blocks (26). A sliding plate (29) is provided inside the grinding block (23), and the sliding plate (29) passes through the inner cylinder (24) and is slidably connected to the inner cylinder (24).

8. The automatic grinding machine tool for machining mechanical parts according to claim 7, characterized in that: Both ends of the inner cylinder (24) are provided with fixing plates (27), one side of the fixing plate (27) is provided with a conical block (30), the base of the conical block (30) is a piston, and can move along the axial direction of the inner cylinder (24), an air hole (28) is provided between the conical block (30) and the fixing plate (27), the tip of the conical block (30) can contact the sliding plate (29), an air cavity (31) is provided between the inner cylinder (24) and the first grinding head (7), and the air cavities (31) between the multiple first grinding heads (7) are connected through an air pipe (22).

9. The automatic grinding machine tool for machining mechanical parts according to claim 8, characterized in that: The first grinding head (7) is provided with a plurality of air holes (28) on the outside, and the air holes (28) are connected to the air cavity (31) through an air valve. The first grinding head (7) and the second grinding head (8) have completely the same structure.

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