Full-automatic polishing machine for round heads of wrenches

Abstract

The utility model relates to the technical field of polishing machines, in particular to a full-automatic polishing machine for round heads of wrenches, which is characterized by comprising an abrasive belt driving mechanism and a polishing operation mechanism, and the polishing operation mechanism comprises a lifting mechanism, an end positioning mechanism, an end holding mechanism and a rotary driving mechanism. The end positioning mechanism comprises a positioning ejector rod, the end enclasping mechanism comprises a support rod, an enclasping air cylinder and an enclasping clamp, the enclasping clamp is used for enclasping the other end of the wrench, and one end of the support rod is fixed to the positioning ejector rod; the positioning ejector rod is driven by the rotary driving mechanism to rotate; the lifting mechanism is used for driving the end positioning mechanism and the end enclasping mechanism to integrally move up and down so as to receive the wrench and enable the round head of the wrench to be close to the abrasive belt; the wrench is clamped through the end positioning mechanism and the end holding mechanism, the end round head is polished by controlling rotation of the wrench, and the beneficial effects of improving the machining efficiency and the working reliability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of polishing machine, specifically relates to a spanner round head full -automatic polishing machine. BACKGROUND

[0002] The spanner is very common on the market, and the machining process of the spanner needs to polish the raw material spanner to ensure that the round head parts at both ends of the spanner are flat and have no burrs. If manual polishing is relied on, the efficiency is not high, and the labor cost is high. Therefore, full -automatic polishing operation for the round head part of the spanner is in great demand on the market, and it is necessary to research and develop.

[0003] In the face of the automatic polishing problem of the spanner, the polishing action after the feeding of the spanner needs to be solved efficiently and reliably, some mechanical hands or mechanical equipment in the existing machinery can feed the spanner, and the workpiece can be transported to the vicinity of the polishing machine, but the polishing action is unreliable, causing the polishing of the round head part of the spanner to be unqualified, and the polishing surface is not complete, so this is a technical difficulty to be solved. UTILITY MODEL CONTENT

[0004] In order to solve the technical problems and shortcomings in the prior art, the utility model provides a spanner round head full -automatic polishing machine, which has the advantages of high polishing efficiency, stable and reliable work, and can overcome the technical problems of unqualified polishing of the round head part of the spanner and incomplete polishing surface.

[0005] To achieve the above object and other related purposes, the utility model adopts the following technical scheme:

[0006] A spanner round head full -automatic polishing machine, comprising a sand belt driving mechanism and a polishing operation mechanism, the polishing operation mechanism comprising a lifting mechanism, an end positioning mechanism, an end clamping mechanism and a rotary driving mechanism;

[0007] The end positioning mechanism comprises a positioning top rod, and the positioning top rod is used for adapting and clamping with the opening of the spanner round head;

[0008] The end clamping mechanism comprises a support rod, a clamping cylinder, a swing seat, a swing block, an extension rod and a clamping clamp, the swing seat is fixed on the support rod, the swing block is rotatably installed on the swing seat, the clamping cylinder is fixed on the side of the swing block and used for abutting against the support rod to drive the swing block to swing, a first spring is arranged between the swing block and the support rod for resetting the swing block, the top of the swing block is fixed with the clamping clamp through the extension rod, the clamping clamp is used for clamping the other end of the spanner, and one end of the support rod is fixed on the positioning top rod;

[0009] The positioning top rod is driven to rotate by the rotary driving mechanism;

[0010] The lifting mechanism is used for driving the end positioning mechanism and the end clamping mechanism to move up and down as a whole to take the wrench and make the round head of the wrench close to the abrasive belt;

[0011] The abrasive belt driving mechanism is used for driving the abrasive belt to roll.

[0012] Preferably, a discharging cylinder is fixed on the support rod and close to the positioning top rod, and a discharging rod of the discharging cylinder is opposite to the lower side of the wrench and is used for discharging the wrench from the positioning top rod.

[0013] Preferably, an eccentric wheel is fixed on the positioning top rod, and the eccentric wheel is matched with an abutting mechanism, the abutting mechanism comprises an adjustable sliding table, a rotating wheel body and a rotating wheel frame, the rotating wheel body is rotatably installed on the rotating wheel frame and is used for abutting the eccentric wheel, and the rotating wheel frame is installed on the adjustable sliding table.

[0014] Preferably, the rotating driving mechanism comprises a servo motor, a belt wheel transmission assembly and a mounting plate, the servo motor is fixed on the mounting plate and drives the lower end of the positioning top rod to rotate through the belt wheel transmission assembly, and the positioning top rod is rotatably assembled on the mounting plate through a bearing.

[0015] Preferably, the device further comprises a push-pull mechanism, the push-pull mechanism comprises a bottom plate, a hinge cylinder, an extension rod, a second spring, an adjusting hand wheel and a push-pull plate, the hinge cylinder is installed on the bottom plate, the extension rod is driven by the hinge cylinder, the extension rod passes through a through hole of the push-pull plate, the second spring is sleeved on the extension rod and abuts against one side of the push-pull plate, the other end of the second spring abuts against the adjusting hand wheel, the adjusting hand wheel is threadedly connected with the extension rod, and the push-pull plate is fixed below the positioning top rod and is used for controlling the positioning top rod to approach or move away from the abrasive belt driving mechanism.

[0016] Preferably, the lifting mechanism comprises a lifting plate and a lifting cylinder, the lifting plate is provided with a wire rail assembly, and the lifting cylinder drives the lifting plate to move.

[0017] Preferably, the abrasive belt driving mechanism comprises an abrasive belt support, an abrasive belt motor, a tensioning mechanism, an abrasive belt large wheel and an abrasive belt wheel, the abrasive belt wheel is rotatably installed on the abrasive belt support through a main shaft, a dustproof cap is arranged on the top of the main shaft, the abrasive belt motor drives the abrasive belt large wheel to rotate on the abrasive belt support, and the tensioning mechanism makes the abrasive belt be taut on the abrasive belt wheel and the abrasive belt large wheel.

[0018] Preferably, the tensioning mechanism comprises a tensioning cylinder, a tensioning support and a parallel wheel, the tensioning cylinder is fixed below the abrasive belt support and drives the tensioning support to move, and the parallel wheel is rotatably installed on the tensioning support and is used for tautening the abrasive belt.

[0019] Compared with the prior art, the device has the following beneficial effects:

[0020] 1. The utility model discloses a positioning top rod is positioned to the spanner round head, so that the end part holds tightly mechanism realizes the clamping of spanner and is held tightly, thereby in the process of processing and polishing spanner, spanner will not be loose and fall off, through the work of holding tightly cylinder to drive swing block, and spring provides reset power, make the holding and release of spanner more stable, lifting mechanism drives spanner lifting action, thereby can let spanner take from the loading place, end part holds tightly mechanism holds tightly spanner, spanner is far from the loading place, and is close to sand belt drive mechanism, thereby sand belt can polish the round head end of spanner, spanner can also be controlled to rotate in the polishing process, thereby realize that the whole arc edge of spanner round head is effectively polished, improve product polishing efficiency and reliability.

[0021] 2. In the utility model, through the configuration of the blanking cylinder, the blanking rod is driven to make the spanner separate from the positioning top rod, thereby realizing the action of rapid blanking.

[0022] 3. In the utility model, the positioning top rod is fixed with an eccentric wheel, and relative movement of the eccentric wheel and the abutting mechanism makes the positioning top rod away from the sand belt under the action of the eccentric wheel when rotating, so that the notch of the spanner round head can be avoided from being touched by the sand belt, thereby processing the polishing position of the spanner in accordance with the requirements, and effectively avoiding the position that does not need to be polished.

[0023] 4. The rotary drive mechanism is stable and efficient, and the belt wheel transmission assembly is used to realize long-distance power transmission.

[0024] 5. The push-pull mechanism can effectively control the polishing pressure, so that the polishing process is more smooth and efficient, and the push-pull action makes the spanner round head part stress against the sand belt for efficient polishing.

[0025] 6. The design of the sand belt drive mechanism uses the tensioning mechanism to quickly replace the sand belt, thereby improving the processing efficiency and facilitating equipment maintenance and maintenance.

[0026] Other additional advantages and beneficial effects of the present application will be partially given in the following description, some will become apparent from the following description, or be known by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute limitations to the utility model. In the drawings:

[0028] Figure 1 It is the overall schematic view of the embodiment of the present application;

[0029] Figure 2 It is the structure schematic view of the utility model embodiment after hiding the shell;

[0030] Figure 3 is a structural schematic diagram of the first end positioning and material taking process of the wrench of the embodiment of the present application;

[0031] Figure 4 is a structural schematic diagram of the second end positioning and material taking process of the wrench of the embodiment of the present application;

[0032] Figure 5 is a schematic diagram of the first end positioning and holding state of the wrench;

[0033] Figure 6 is a schematic diagram of the first end polishing of the wrench;

[0034] Figure 7 is a specific schematic diagram of mechanical assembly.

[0035] Explanation of the reference numerals of the main components:

[0036] 1. Belt driving mechanism; 11. Belt support; 12. Belt motor; 13. Tensioning mechanism; 131. Tensioning cylinder; 132. Tensioning support; 133. Parallel wheel; 14. Belt large wheel; 15. Belt wheel; 16. Main shaft; 17. Dustproof cap;

[0037] 2. Lifting mechanism; 21. Lifting plate; 22. Lifting cylinder; 23. Linear rail assembly;

[0038] 3. End positioning mechanism; 31. Positioning top rod;

[0039] 4. End holding mechanism; 41. Support rod; 42. Holding cylinder; 43. Swing seat; 44. Swing block; 45. Extension rod; 46. Holding clamp; 47. First spring;

[0040] 5. Rotating driving mechanism; 51. Servo motor; 52. Belt wheel transmission assembly; 53. Mounting plate; 61. Feeding cylinder; 62. Feeding rod; 71. Eccentric wheel; 72. Abutting mechanism; 721. Adjustable sliding table; 722. Rotating wheel body; 723. Rotating wheel frame;

[0041] 8. Push-pull mechanism; 81. Bottom plate; 82. Hinge cylinder; 83. Telescopic rod; 84. Second spring; 85. Adjusting hand wheel; 86. Push-pull plate; 9. Wrench. DETAILED DESCRIPTION

[0042] The present application will be further described below with reference to the drawings. The embodiments of the present application will be described in the following with reference to specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. The present application can also be implemented or applied in other different embodiments, and various modifications or changes can be made to the details in the specification without departing from the spirit of the present application. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0043] It should be noted that the diagrams provided in the following examples only schematically illustrate the basic concept of the present application, and the diagrams only show the components related to the present application, not the number, shape and size of the components when actually implemented. The shape, number and ratio of the components can be changed arbitrarily when actually implemented, and the layout pattern of the components can also be more complex.

[0044] It should be noted that in the description of the present application, the terms indicating the direction or positional relationship of "up", "down", "left", "right", "in", "out" and the like are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] Embodiment:

[0046] Regarding the wrench 9 in the present scheme, it is a product of the prior art. For example, the wrench 9 is usually provided with an opening or a sleeve hole for clamping a bolt or a nut at one end or both ends of the handle. The notch described below is the opening of the wrench 9. Both the opening and the sleeve hole have a round head shape and need to polish the outer edge.

[0047] The embodiment of the present application discloses a full-automatic polishing machine for the round head of a wrench 9, which comprises a sand belt driving mechanism 1 and a polishing operation mechanism. The polishing operation mechanism comprises a lifting mechanism 2, an end positioning mechanism 3, an end clamping mechanism 4 and a rotary driving mechanism 5.

[0048] Among them, reference Figure 2 , Figure 3 andFigure 7 It is understood that the end positioning mechanism 3 includes a positioning top rod 31, which is used to be fitted and clamped with the round head opening of the wrench 9; the upper end of the positioning top rod 31 can be inserted into the opening or sleeve hole of the wrench 9 to achieve positioning. The lowermost end of the positioning top rod 31 is provided with a pulley. The pulley is part of the rotary drive mechanism 5, so the positioning top rod 31 can be driven to rotate by the rotary drive mechanism 5.

[0049] The end clamping mechanism 4 includes a support rod 41, a clamping cylinder 42, a swing seat 43, a swing block 44, an extension rod 45, and a clamping clamp 46. The shape of the clamping clamp 46 is adapted to the wrench 9, and the end of the wrench 9 can be supported on the clamping clamp 46 and can be clamped thereby. In Figure 3 It is understood in the above description that the swing seat 43 is fixed on the support rod 41, the swing block 44 is rotatably installed on the swing seat 43, the clamping cylinder 42 is fixed on the side of the swing block 44 for abutting against the support rod 41 to drive the swing block 44 to swing, the first spring 47 is arranged between the swing block 44 and the support rod 41 for resetting the swing block, the top of the swing block 44 fixes the clamping clamp 46 through the extension rod 45, the clamping clamp 46 is used to clamp the other end of the wrench 9, and one end of the support rod 41 is fixed on the positioning top rod 31. Here, the principle of a lever is used to achieve the swing of the swing block 44, the action of the clamping cylinder 42, and the swing of the swing block 44 on the swing seat 43, so as to drive the clamping clamp 46 to open and close relative to the positioning top rod 31. The clamping and clamping of the wrench 9 are achieved, and the wrench 9 is released. Here, the first spring 47 is arranged below the swing block 44 to provide a resetting force, so that the posture position of the clamping clamp 46 in the initial state is more stable and reliable.

[0050] In combination with the above description, the positioning top rod 31 is driven to rotate by the rotary drive mechanism 5, and the abrasive belt driving mechanism 1 is used to drive the abrasive belt to roll. Thus, the wrench 9 can rotate around the axis of the positioning top rod 31 as the rotation axis, so that the outer periphery of the wrench 9 on the positioning top rod 31 can be effectively polished. The rotary drive mechanism 5 includes a servo motor 51, a pulley transmission assembly 52, and a mounting plate 53. The servo motor 51 is fixed on the mounting plate 53 and drives the lower end of the positioning top rod 31 to rotate through the pulley transmission assembly 52. The positioning top rod 31 is rotatably assembled on the mounting plate 53 through a bearing. The servo motor 51 can be provided with a speed reduction mechanism or a speed regulation mechanism. The pulley transmission assembly 52 is a conventional transmission mode, which can effectively control power transmission and achieve the rotation of the positioning top rod 31.

[0051] In order to enable the wrench 9 to move up and down to obtain the wrench 9 from the material taking manipulator or the feeding mechanism for polishing processing, the wrench 9 needs to move up and down, and the wrench 9 also needs to move up and down during polishing to ensure that the position of the wrench 9 in contact with the abrasive belt is constantly changed, so as to avoid the abrasive belt polishing at the same position, thereby effectively improving the service life of the abrasive belt. The lifting mechanism 2 is used to drive the end positioning mechanism 3 and the end clamping mechanism 4 to move up and down as a whole to obtain the wrench 9, and to make the round head of the wrench 9 close to the abrasive belt. In Figure 1 and Figure 2 In the above scheme, the lifting mechanism 2 includes a lifting plate 21 and a lifting cylinder 22, the lifting plate 21 is provided with a linear rail assembly 23, and the lifting cylinder 22 drives the lifting plate 21 to move. In the present scheme, the shell (machine shell) is not described in detail, because this part can be adjusted freely according to the actual situation, and the mechanical action function realized by the above lifting mechanism 2 is relatively easy to understand. The linear rail assembly 23 is a combination of a sliding block and a sliding rail, which is relatively common and will not be described in detail.

[0052] In the present scheme, further preferably, in order to realize automatic unloading, the support rod 41 is fixed with an unloading cylinder 61 near the positioning top rod 31, and the unloading rod 62 of the unloading cylinder 61 is opposite to the lower side of the wrench 9 for ejecting the wrench 9 from the positioning top rod 31. When the polishing processing is completed, the clamping clamp 46 is loosened, and at this time the wrench 9 is still supported on the positioning top rod 31 and the clamping clamp 46, and needs to be ejected by the unloading rod 62 of the unloading cylinder 61 to automatically fall off.

[0053] On the other hand, in the present scheme, in order to adapt to the polishing processing of the wrench 9 with one end opening, the positioning top rod 31 is fixed with an eccentric wheel 71. The eccentric wheel 71 is adapted with an abutting mechanism 72, the abutting mechanism 72 includes an adjustable sliding table 721, a rotating wheel body 722, and a rotating wheel frame 723, the rotating wheel body 722 is rotatably installed on the rotating wheel frame 723 and is abutted by the eccentric wheel 71, and the rotating wheel frame 723 is installed on the adjustable sliding table 721. The adjustable sliding table 721 is installed by bolt adjustment. When working, the positioning top rod 31 needs to be rotated to change the polishing position of the wrench 9, at this time, due to the action of the eccentric wheel 71, when the wrench 9 rotates to the opening, the eccentric wheel 71 abuts on the rotating wheel body 722, when the eccentric distance increases, the wrench 9 moves away from the abrasive belt, and when the eccentric distance decreases, the wrench 9 approaches and contacts the abrasive belt to re-polish the position.

[0054] In the present scheme, regarding the push-pull mechanism 8, the push-pull mechanism 8 comprises a base plate 81, a hinge cylinder 82, an extension rod 83, a second spring 84, an adjusting hand wheel 85, and a push-pull plate 86, the hinge cylinder 82 is installed on the base plate 81, the extension rod 83 is driven by the hinge cylinder 82, the extension rod 83 passes through the perforation of the push-pull plate 86, the second spring 84 is sleeved on the extension rod 83 and abuts against one side of the push-pull plate 86, the other end of the second spring 84 abuts against the adjusting hand wheel 85, the adjusting hand wheel 85 is threadedly connected with the extension rod 83, and the push-pull plate 86 is fixed below the positioning top rod 31 to control the positioning top rod 31 to approach or move away from the abrasive belt driving mechanism 1. The push-pull mechanism 8 can effectively realize that the wrench 9 abuts against the abrasive belt, and is flexible because the second spring 84 provides a preset elastic force, so that the polishing process is more reliable. At the same time, through the action of the hinge cylinder 82, the wrench 9 can also move away from the abrasive belt.

[0055] In the present scheme, the abrasive belt driving mechanism 1 comprises an abrasive belt support 11, an abrasive belt motor 12, a tensioning mechanism 13, an abrasive belt large wheel 14, and an abrasive belt wheel 15, the abrasive belt wheel 15 is rotatably installed on the abrasive belt support 11 through a main shaft 16, a dustproof cap 17 is arranged at the top of the main shaft 16, the abrasive belt motor 12 drives the abrasive belt large wheel 14 to rotate on the abrasive belt support 11, and the tensioning mechanism 13 makes the abrasive belt tight on the abrasive belt wheel 15 and the abrasive belt large wheel 14.

[0056] Specifically, the tensioning mechanism 13 comprises a tensioning cylinder 131, a tensioning support 132, and a parallel wheel 133, the tensioning cylinder 131 is fixed below the abrasive belt support 11 and drives the tensioning support 132 to move, and the parallel wheel 133 is rotatably installed on the tensioning support 132 and is used for tightening the abrasive belt.

[0057] In the present scheme, the positioning top rod 31 is used for positioning the round head of the wrench 9, so that the end part clamping mechanism 4 can clamp and hold the wrench 9, so that the wrench 9 will not loosen and fall off during the machining and polishing of the wrench 9. The working of the clamping cylinder 42 drives the swing block 44, and the spring provides a reset power, so that the clamping and releasing of the wrench 9 are more stable. The lifting mechanism 2 drives the lifting action of the wrench 9, so that the wrench 9 can be taken from the feeding position, the end part clamping mechanism 4 clamps the wrench 9, the wrench 9 moves away from the feeding position and approaches the abrasive belt driving mechanism 1, so that the abrasive belt can polish the round head end of the wrench 9. The wrench 9 can also be controlled to rotate in the polishing process, so that the whole arc edge of the round head of the wrench 9 is effectively polished, and the polishing efficiency and reliability of the product are improved.

[0058] Working process: initially, the feeding mechanism (feeding mechanism or manipulator) sends out the wrench 9 until the material is taken out. The lifting mechanism 2 pushes the positioning top rod 31 and the clamping clamp 46 up, so that the wrench 9 is supported by the top rod and the clamping clamp 46. Then, the clamping cylinder 42 acts, and the clamping clamp 46 approaches the positioning top rod 31, and the positioning top rod 31 is inserted into the opening or sleeve hole of the wrench 9, so as to realize the clamping action of the wrench 9. Then the lifting mechanism 2 can drive the wrench 9 to descend to the position close to the sand belt, the push-pull mechanism 8 acts, and the push-pull plate 86 abuts the wrench 9 to the sand belt, and when the machining is completed, the push-pull mechanism 8 releases or pushes the wrench 9 out of the sand belt, so as to facilitate the re-lifting action. When the push-pull mechanism 8 makes the wrench 9 abut on the sand belt, the positioning top rod 31 rotates to work, so that the outer periphery of the wrench 9 is polished. If one end of the wrench 9 is open, the eccentric wheel 71 can also be used to realize local separation from the sand belt. After the polishing is completed, the sand belt is separated, and the unloading is carried out. After the unloading cylinder 61 ejects the wrench 9, it is reset. The workpiece after processing is free to fall, which can be connected with the material frame. Finally, the equipment is reset, the operation is repeated, and the new wrench 9 is taken to process.

[0059] So far, the technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings. The above description is only the preferred embodiment of the present application and is not used to limit the present application; for those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A full-automatic polishing machine for wrench head, comprising a sand belt driving mechanism (1) and a polishing operating mechanism, characterized in that, The polishing operation mechanism comprises a lifting mechanism (2), an end positioning mechanism (3), an end clamping mechanism (4), and a rotary driving mechanism (5); The end positioning mechanism (3) comprises a positioning top rod (31) which is adapted to be clamped with the opening of the round head of the wrench (9); The end clamping mechanism (4) comprises a support rod (41), a clamping cylinder (42), a swing base (43), a swing block (44), an extension rod (45), and a clamping clamp (46), the swing base (43) is fixed on the support rod (41), the swing block (44) is rotatably installed on the swing base (43), the clamping cylinder (42) is fixed on the side of the swing block (44) for abutting against the support rod (41) to drive the swing block (44) to swing, a first spring (47) for resetting the swing block is arranged between the swing block (44) and the support rod (41), the top of the swing block (44) is fixed with the clamping clamp (46) through the extension rod (45), the clamping clamp (46) is used for clamping the other end of the wrench (9), one end of the support rod (41) is fixed on the positioning top rod (31); The positioning top rod (31) is driven to rotate by the rotary driving mechanism (5); The lifting mechanism (2) is used for driving the end positioning mechanism (3) and the end clamping mechanism (4) to move up and down as a whole to take the wrench (9) and make the round head of the wrench (9) close to the abrasive belt; The abrasive belt driving mechanism (1) is used for driving the abrasive belt to roll.

2. The full-automatic polishing machine for wrench head according to claim 1, characterized in that, A discharging cylinder (61) is fixed on the support rod (41) close to the positioning top rod (31), and a discharging rod (62) of the discharging cylinder (61) is opposite to the lower side of the wrench (9) for discharging the wrench (9) from the positioning top rod (31).

3. The full-automatic polishing machine for wrench head according to claim 1, characterized in that, An eccentric wheel (71) is fixed on the positioning top rod (31), the eccentric wheel (71) is adapted with an abutting mechanism (72), the abutting mechanism (72) comprises an adjustable sliding table (721), a rotary wheel body (722), and a rotary wheel frame (723), the rotary wheel body (722) is rotatably installed on the rotary wheel frame (723) and is abutted by the eccentric wheel (71), and the rotary wheel frame (723) is installed on the adjustable sliding table (721).

4. The full-automatic polishing machine for wrench head according to claim 1, characterized in that, The rotary driving mechanism (5) comprises a servo motor (51), a belt wheel driving assembly (52), and a mounting plate (53), the servo motor (51) is fixed on the mounting plate (53) to drive the lower end of the positioning top rod (31) to rotate through the belt wheel driving assembly (52), and the positioning top rod (31) is rotatably assembled on the mounting plate (53) through a bearing.

5. The full-automatic polishing machine for wrench head according to claim 1, characterized in that, Also include a push-pull mechanism (8), the push-pull mechanism (8) includes a bottom plate (81), hinge cylinder (82), telescopic rod (83), the second spring (84), adjusting hand wheel (85), and push-pull plate (86), hinge cylinder (82) is installed on the bottom plate (81), telescopic rod (83) is driven by hinge cylinder (82), telescopic rod (83) passes through the perforation of push-pull plate (86), the second spring (84) is sleeved on telescopic rod (83) and abuts on one side of push-pull plate (86), the other end of second spring (84) abuts on adjusting hand wheel (85), adjusting hand wheel (85) is connected with telescopic rod (83) by screw threads, push-pull plate (86) is fixed below positioning top rod (31) and controls positioning top rod (31) to be close to or away from abrasive belt driving mechanism (1).

6. The full-automatic polishing machine for wrench head according to claim 1, characterized in that, The lifting mechanism (2) includes a lifting plate (21) and a lifting cylinder (22), the wire rail assembly (23) is assembled on the lifting plate (21), and the lifting cylinder (22) drives the lifting plate (21) to move.

7. The full-automatic polishing machine for wrench head according to claim 1, characterized in that, The abrasive belt driving mechanism (1) includes a belt support (11), a belt motor (12), a tensioning mechanism (13), a belt large wheel (14) and a belt wheel (15), the belt wheel (15) is rotatably installed on the belt support (11) through a main shaft (16), a dustproof cap (17) is arranged at the top of the main shaft (16), the belt motor (12) drives the belt large wheel (14) to rotate on the belt support (11), and the tensioning mechanism (13) makes the abrasive belt tight on the belt wheel (15) and the belt large wheel (14).

8. The full-automatic polishing machine for wrench head according to claim 7, characterized in that, The tensioning mechanism (13) includes a tensioning cylinder (131), a tensioning support (132) and a parallel wheel (133), the tensioning cylinder (131) is fixed below the belt support (11) and drives the tensioning support (132) to move, and the parallel wheel (133) is rotatably installed on the tensioning support (132) and is used for tightening the abrasive belt.

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