Polishing device for mechanical part manufacturing

Abstract

The invention relates to the technical field of mechanical part manufacturing, in particular to a polishing device for mechanical part manufacturing, which comprises a base and a polishing wheel rotationally arranged in the base, a central shaft of the polishing wheel is fixedly connected with a motor, the motor is fixedly connected to the outer wall of one side of the base, and the upper end of the polishing wheel extends to the upper side of the base. Vertical plates are fixedly connected to the two opposite sides of the upper surface of the base, and lifting rails are arranged on the opposite side walls of the two vertical plates in an up-down sliding mode. According to the polishing device for mechanical part manufacturing, in the normal work process, an air extracting pump extracts air to remove dust, air can replace a spring to achieve the buffering effect, due to the arrangement of a special-shaped groove, the position of a part can be rapidly and downwards adjusted manually, and when too large pressure is applied downwards, the part can be conveniently and rapidly polished. The limiting rod can be continuously inserted into the limiting inserting groove through air suction, limiting can be relieved only by closing the air suction pump which should stop running subsequently, and rapidness and convenience are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical parts manufacturing, in particular to a polishing device for mechanical parts manufacturing. Background Art

[0002] Mechanical parts need to be polished using polishing equipment during the production process to remove burrs, scratches and other surface defects on the parts to make the surface smoother. Currently, manual polishing is still a common polishing method, which requires manual holding or the use of clamping tools to bring the parts close to a high-speed rotating polishing wheel for polishing. However, manual methods may cause the surface of mechanical parts to be damaged due to excessive polishing.

[0003] The invention with publication number CN113579971A provides a polishing device for engineering machinery parts. By setting an adjustable pressing and clamping assembly, adjustable clamping according to mechanical parts of different sizes can be achieved. At the same time, when the mechanical parts are polished by manually pushing the clamps, a buffering effect is achieved through telescopic springs and support springs to avoid excessive polishing and damage to the surface of the mechanical parts.

[0004] However, in the above invention, telescopic springs and support springs are used for buffering. The springs will become fatigued or even damaged after long-term and frequent use, which will weaken the buffering effect. In addition, manual control of the movement of mechanical parts or collision with the moving mechanism may still cause the mechanical parts to move excessively, resulting in excessive grinding and polishing of the parts, and dust particles will be generated during polishing, which will affect the staff. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a polishing device for manufacturing mechanical parts.

[0006] The present invention adopts the following technical scheme, a polishing device for manufacturing mechanical parts, comprising a base and a grinding wheel rotatably arranged in the base, the central axis of the grinding wheel is fixedly connected to a motor, the motor is fixedly connected to an outer wall of one side of the base, the upper end of the grinding wheel extends to the upper side of the base, two opposite sides of the upper surface of the base are fixedly connected to vertical plates, and the two vertical plates are provided with lifting rails on the opposite side walls for sliding up and down, a clamping head is provided on the lifting rail for horizontal sliding, a dust suction groove is provided on the side of the lower end of the vertical plate close to the grinding wheel, and an air pump is fixedly connected to the side wall of one end of the vertical plate away from the grinding wheel, and further comprising: A buffer mechanism, used to replace the spring to achieve buffering, and the buffer mechanism is arranged in the vertical plate; A locking mechanism, which restricts the accessories so that they can be opened and closed automatically, and the locking mechanism is arranged in the buffer mechanism; And a trigger mechanism is used for automatically judging the falling speed of the accessory, and the trigger mechanism is arranged in the buffer mechanism.

[0007] As a further description of the above technical solution: the buffer mechanism includes a special-shaped groove opened in the vertical plate, and the special-shaped groove is arranged close to the air pump, the special-shaped groove is connected with the suction end of the air pump, a lifting block is provided on the side of the special-shaped groove away from the air pump, and the lifting block is slidably arranged in the vertical plate, an air guide groove 2 is opened in the lifting block, an air guide groove 1 is opened in the vertical plate, and one end of the air guide groove 1 is connected with the dust suction groove, and the other end of the air guide groove 1 is connected with the air guide groove 2 through the slide groove where the lifting block is located, the air guide groove 2 is connected to the special-shaped groove, and the slide groove on the lower side of the lifting block is connected to the outer side of the vertical plate.

[0008] As a further description of the above technical solution: the locking mechanism includes a limit slot, and the limit slot is opened on the inner wall of the slide groove where the lifting block is located, and a plug rod 1 is horizontally movably inserted in the lifting block, and one side of the plug rod 1 is located in the lifting block and a plug rod 2 is horizontally movably inserted, and the outer side of the plug rod 2 is located in the lifting block and a sliding groove is opened, and a ventilation groove is opened on the side wall of the sliding groove, and the other end of the ventilation groove is connected with the slide groove on the lower side of the lifting block, the plug rod 1 and the gear are fixed with external teeth at the opposite end, and gears are meshed between the external teeth on both sides, and the end of the plug rod 2 away from the special-shaped groove is fixed with a limit rod, and the upper end of the limit rod is provided with an inclined sliding surface 1.

[0009] As a further description of the above technical solution: the trigger mechanism includes a connecting plate, which is fixedly connected to the lifting block and is located on two opposite sides of the counterweight block. Counterweight blocks are inserted up and down between the connecting plates on both sides. A placement groove is surrounded by the upper part of one end of the counterweight block close to the vertical plate and the connecting plate. A toggle block is fixedly connected to one end of the vertical plate close to the counterweight block, and the toggle block is slidably arranged in the placement groove up and down. A non-Newtonian fluid is contained in the placement groove. The lower end of the counterweight block extends to the lower side of the connecting plate, and an extrusion head is provided at the bottom end of the counterweight block.

[0010] As a further description of the above technical solution: the longitudinal cross-sectional area of ​​the special-shaped groove gradually decreases from top to bottom.

[0011] As a further description of the above technical solution: a plug plate is fixedly connected to the upper end of the lifting rail, and the plug plate is movably inserted in the vertical plate, and the vacuum pump is an air pump with a fixed flow rate.

[0012] As a further description of the above technical solution: the first insertion rod and the second insertion rod are both connected to the upper part of the special-shaped groove.

[0013] As a further description of the above technical solution: the width of the toggle block is smaller than the width of the placement slot.

[0014] The present invention provides a polishing device for manufacturing mechanical parts through improvement, which has the following improvements and advantages compared with the prior art: First, during normal operation, the vacuum pump can remove dust by pumping air, and the gas can replace the spring to play a buffering role. In addition, when the overlapping area of ​​the second air guide groove and the special-shaped groove remains unchanged at the beginning, the resistance is small, and the position of the accessories can be adjusted downward quickly by manual operation, thereby improving work efficiency. Second: when too much pressure is applied downward, the suction of gas can continuously insert the limit rod into the limit slot, and subsequently, the limit can be released by simply turning off the vacuum pump that should have stopped running, which is quick and convenient; Thirdly, the trigger mechanism is used to automatically determine the falling speed of the accessory, and through the setting of the special-shaped groove in the buffer mechanism, the lifting block will not be limited when the accessory is manually adjusted downward quickly at the beginning, thus further ensuring the initial rapid downward adjustment.

[0015] To sum up, during normal operation, the vacuum pump can pump air to remove dust, and the gas can replace the spring to play a buffering role. Due to the setting of the special-shaped groove, the position of the accessory can be adjusted downward quickly by humans. When too much pressure is applied downward, the suction of the gas can continue to insert the limit rod into the limit slot, and subsequently, the vacuum pump that should have stopped running only needs to be turned off to release the limit. It is quick and convenient. Moreover, through the setting of the special-shaped groove in the buffer mechanism, the lifting block will not be limited when the accessory is initially adjusted downward quickly by humans, thereby further ensuring the initial rapid downward adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments: Figure 1 A schematic structural diagram of a polishing device for manufacturing mechanical parts provided by an embodiment of the present invention; Figure 2 A three-dimensional cross-sectional view of a base provided by an embodiment of the present invention; Figure 3 A three-dimensional cross-sectional view of a vertical plate provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a special-shaped groove provided in an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a lifting block provided in an embodiment of the present invention; Figure 6 A three-dimensional cross-sectional view of a lifting block provided in an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a plug rod 1 provided in an embodiment of the present invention; Figure 8 for Figure 5 The enlarged view of point A in the middle; Fig. 9 for Figure 6 The enlarged view of point B in the middle; Fig.10 for Figure 6 Enlarged view of point C in the middle; Fig.11 for Figure 7 Enlarged view of point D in the middle.

[0017] In the figure: 1. base; 2. grinding wheel; 3. motor; 4. vertical plate; 5. vacuum pump; 6. clamping head; 7. lifting rail; 71. plug plate; 8. dust suction groove; 9. buffer mechanism; 91. special-shaped groove; 92. air guide groove 1; 93. lifting block; 94. air guide groove 2; 10. locking mechanism; 101. limit slot; 102. plug rod 1; 103. sliding groove; 104. plug rod 2; 105. ventilation groove; 106. limit rod; 107. gear; 108. external gear; 109. inclined sliding surface 1; 11. trigger mechanism; 111. counterweight block; 112. connecting plate; 113. toggle block; 114. extrusion head; 115. placement groove. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below with reference to specific diagrams. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0019] See also Figure 1 - Fig.11 The embodiment of the present invention provides a technical solution: a polishing device for manufacturing mechanical parts, comprising a base 1 and a grinding wheel 2 rotatably arranged in the base 1, the central axis of the grinding wheel 2 is fixedly connected to a motor 3, the motor 3 is fixedly connected to an outer wall of one side of the base 1, the upper end of the grinding wheel 2 extends to the upper side of the base 1, and vertical plates 4 are fixedly connected to the two opposite sides of the upper surface of the base 1, and the two vertical plates 4 are provided with lifting rails 7 on the opposite side walls for sliding up and down, and a clamping head 6 is provided on the lifting rail 7 for horizontal sliding, a dust suction groove 8 is provided on the side of the lower end of the vertical plate 4 close to the grinding wheel 2, and an air pump 5 is fixedly connected to the side wall of the vertical plate 4 away from the grinding wheel 2, and also includes: A buffer mechanism 9 is used to replace the spring to achieve buffering, and the buffer mechanism 9 is arranged in the vertical plate 4; The locking mechanism 10 can realize automatic opening and closing of the restriction on the accessories, and the locking mechanism 10 is arranged in the buffer mechanism 9; And a trigger mechanism 11 is used to automatically determine the falling speed of the accessory, and the trigger mechanism 11 is arranged in the buffer mechanism 9.

[0020] A plug plate 71 is fixedly connected to the upper end of the lifting rail 7, and the plug plate 71 is movably inserted in the vertical plate 4, and the air pump 5 is an air pump with a fixed flow rate.

[0021] Specifically, during normal operation, the vacuum pump 5 can remove dust by vacuuming, and the gas can replace the spring to play a buffering role. Due to the setting of the special-shaped groove 91, the position of the accessory can also be quickly adjusted downward manually; When the pressure applied downward is too great, the suction of gas can continuously insert the limit rod 106 into the limit slot 101, and subsequently, the limit can be released by simply turning off the air pump 5 that should have stopped running, which is quick and convenient; Furthermore, by providing the special-shaped groove 91 in the buffer mechanism 9, when the accessory is manually adjusted downward quickly at the beginning, the lifting block 93 will not be limited, thereby further ensuring the initial rapid downward adjustment.

[0022] The insert plate 71 can prevent air leakage from the upper cavity of the lifting block 93 .

[0023] In another embodiment provided by the present invention, the buffer mechanism 9 includes a special-shaped groove 91 provided in the vertical plate 4, and the special-shaped groove 91 is arranged close to the air pump 5, the special-shaped groove 91 is connected to the suction end of the air pump 5, a lifting block 93 is provided on the side of the special-shaped groove 91 away from the air pump 5, and the lifting block 93 is slidably arranged in the vertical plate 4, an air guide groove 2 94 is provided in the lifting block 93, an air guide groove 1 92 is provided in the vertical plate 4, and one end of the air guide groove 1 92 is connected to the dust suction groove 8, and the other end of the air guide groove 1 92 is connected to the air guide groove 2 94 through the slide groove where the lifting block 93 is located, the air guide groove 2 94 is connected to the special-shaped groove 91, and the slide groove on the lower side of the lifting block 93 is connected to the outer side of the vertical plate 4.

[0024] The longitudinal cross-sectional area of ​​the special-shaped groove 91 gradually decreases from top to bottom.

[0025] Specifically, during normal operation, the vacuum pump 5 can remove dust by vacuuming, and the gas can replace the spring to play a buffering role. Due to the provision of the special-shaped groove 91, the position of the accessory can also be quickly adjusted downward manually.

[0026] In another embodiment provided by the present invention, the locking mechanism 10 includes a limiting slot 101, and the limiting slot 101 is opened on the inner wall of the sliding groove where the lifting block 93 is located, and a rod 102 is inserted in the lifting block 93 for horizontal movement, and one side of the rod 102 is located in the lifting block 93 and a rod 2 104 is inserted therein for horizontal movement, and the outer side of the rod 2 104 is located in the lifting block 93 and a sliding groove 103 is opened, and a ventilation groove 105 is opened on the side wall of the sliding groove 103, and the other end of the ventilation groove 105 is connected to the sliding groove on the lower side of the lifting block 93, and the rod 102 and the gear 107 are fixedly connected to the opposite ends with external teeth 108, and the gear 107 is meshed between the external teeth 108 on both sides, and the end of the rod 2 104 away from the special-shaped groove 91 is fixedly connected to the limiting rod 106, and the upper end of the limiting rod 106 is opened with an inclined sliding surface 109.

[0027] The first insertion rod 102 and the second insertion rod 104 are both connected to the upper portion of the special-shaped groove 91 .

[0028] Specifically, when too much pressure is applied downward, the suction of gas can continuously insert the limit rod 106 into the limit slot 101, and subsequently, the limit can be released by simply turning off the vacuum pump 5 that should have stopped running, which is quick and convenient.

[0029] In another embodiment provided by the present invention, the trigger mechanism 11 includes a connecting plate 112, which is fixedly connected to the lifting block 93, and the connecting plate 112 is located on two opposite sides of the counterweight block 111, and the counterweight blocks 111 are inserted up and down between the connecting plates 112 on both sides, and a placement groove 115 is surrounded between the upper part of one end of the counterweight block 111 close to the vertical plate 4 and the connecting plate 112, and a toggle block 113 is fixedly connected to one end of the vertical plate 4 close to the counterweight block 111, and the toggle block 113 is slidably arranged in the placement groove 115 up and down, and a non-Newtonian fluid is tanked in the placement groove 115, the lower end of the counterweight block 111 extends to the lower side of the connecting plate 112, and an extrusion head 114 is provided at the bottom end of the counterweight block 111.

[0030] The width of the toggle block 113 is smaller than the width of the placement slot 115 .

[0031] Specifically, by providing the special-shaped groove 91 in the buffer mechanism 9, when the accessory is manually adjusted downward quickly at the beginning, the lifting block 93 will not be limited, thereby further ensuring the initial rapid downward adjustment.

[0032] The small width of the toggle block 113 enables the toggle block 113 to move freely in the softened non-Newtonian fluid.

[0033] Working principle: When using the device, the accessories to be polished are clamped by the clamping head 6, and then the motor 3 and the air pump 5 are started, and the clamping head 6 is manually slid horizontally to a suitable position, and then the clamping head 6 is pressed downward. When the clamping head 6 moves downward, the lifting block 93 is also driven downward, and the air pump 5 draws air, which will make the gas near the grinding wheel 2 pass through the dust suction groove 8, the air guide groove 1 92, the air guide groove 2 94 and the special-shaped groove 91, and finally be drawn out to the outside of the vertical plate 4 by the air pump 5, which can play a role in dust removal during polishing, and when the lifting block 93 moves downward, a cavity will be generated between the upper end of the lifting block 93 and the vertical plate 4, and the gas will pass through this cavity when being extracted, which will reduce the pressure in this cavity, and the pressure on the upper side of the lifting block 93 is less than that on the lower side, so the lifting block 93 will be pushed upward, and at this time, when the clamping head 6 and the lifting block 93 are moved downward manually, they will encounter partial resistance, so they can replace the spring to play a buffering role, preventing the spring from fatigue after long-term frequent use, so that the buffering effect is weakened; The longitudinal cross-sectional area of ​​the special-shaped groove 91 gradually decreases from top to bottom, which makes the overlap area of ​​the end of the air guide groove 2 94 connected to the special-shaped groove 91 and the special-shaped groove 91 fixed at the beginning, and the overlap area of ​​the subsequent air guide groove 2 94 and the special-shaped groove 91 gradually decreases. When the channel becomes narrower and the cross-sectional area decreases, since the air pump 5 is an air pump with a fixed flow rate, according to the continuity equation, if the flow rate is to remain unchanged, the flow rate must increase, and the flow rate when the gas is extracted increases, so that the gas flow in the upper cavity of the lifting block 93 increases, so that the pressure on the upper side of the lifting block 93 decreases, so that the more the clamping head 6 is pressed downward, the greater the buffer, and there can be a buffer resistance similar to a spring to prevent the clamping head 6 from moving to the lowest side, so that the accessories and the grinding wheel 2 are over-extruded, thereby causing excessive polishing, and when the overlap area of ​​the air guide groove 2 94 and the special-shaped groove 91 remains unchanged at the beginning, the resistance is small, and the position of the accessories can be adjusted downward quickly manually to improve work efficiency; If the person loses balance or accidentally applies too much pressure downward, the downward speed of the clamping head 6 will become very large. At this time, the toggle block 113 will move quickly in the placement groove 115, so that the non-Newtonian fluid in the placement groove 115 becomes hard. The non-Newtonian fluid will move upward with the toggle block 113, so that the hardened non-Newtonian fluid can push the counterweight block 111 upward, so that the counterweight block 111 will no longer block the limit rod 106, and the lifting block 93 can be locked by vacuuming later; When the counterweight block 111 no longer blocks the limit rod 106, the insertion rod 102 and the insertion rod 2 104 move to the lower side. At this time, the insertion rod 102 is connected to the special-shaped groove 91, and the insertion rod 2 104 conflicts with the inner wall of the vertical plate 4. At this time, the suction force of the special-shaped groove 91 sucks the insertion rod 102 in the direction away from the limit rod 106. Through the transmission of the insertion rod 102, the gear 107 and the insertion rod 2 104, the insertion rod 2 104 inserts the limit rod 106 into the limit slot 101 to complete the limit, preventing the accessories from continuing to move downward when the downward pressure is too large, so as to prevent the accessories from being damaged. The safety of the staff is also ensured. When the limit needs to be released later, it is only necessary to turn off the vacuum pump 5, and the insertion rod 102 will not be sucked again. Since the speed of the toggle block 113 has been reduced, the non-Newtonian fluid becomes soft, and the counterweight block 111 will move downward under the action of gravity, and the extrusion head 114 squeezes the inclined sliding surface 109 to automatically extract the limit rod 106 from the limit slot 101, so that the lifting block 93 can be released from the limit. It is only necessary to turn off the vacuum pump 5 that should have stopped running. The structure is simple, and the limit is released quickly and conveniently. It should be noted that due to the structural design of the special-shaped groove 91, initially the insertion rod 102 and the insertion rod 2 104 are both connected to the upper part of the special-shaped groove 91, so the insertion rod 102 and the insertion rod 2 104 are both sucked, and the insertion rod 102 and the insertion rod 2 104 will not move. This makes it possible for the lifting block 93 to not be limited when the accessory is initially adjusted downward quickly by hand, even if the trigger mechanism 11 is triggered and the non-Newtonian fluid hardens. The lifting block 93 will only be limited when it is on the lower side and the speed is very fast, thereby further ensuring the initial rapid downward adjustment.

[0034] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and the description in the specification are only to illustrate 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 to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A polishing device for manufacturing mechanical parts, comprising a base (1) and a grinding wheel (2) rotatably arranged in the base (1), the central axis of the grinding wheel (2) is fixedly connected to a motor (3), the motor (3) is fixedly connected to an outer wall of one side of the base (1), the upper end of the grinding wheel (2) extends to the upper side of the base (1), two opposite sides of the upper surface of the base (1) are fixedly connected to vertical plates (4), and the opposite side walls of the two vertical plates (4) are provided with lifting rails (7) for sliding up and down, and a clamping head (6) is horizontally slidably arranged on the lifting rail (7), a dust suction groove (8) is provided on the side of the lower end of the vertical plate (4) close to the grinding wheel (2), and an air pump (5) is fixedly connected to the side wall of the vertical plate (4) at one end away from the grinding wheel (2), characterized in that: Also includes: A buffer mechanism (9) is used to replace the spring to achieve buffering, and the buffer mechanism (9) is arranged in the vertical plate (4); A locking mechanism (10) that restricts the accessory so that automatic opening and closing can be achieved, and the locking mechanism (10) is arranged in the buffer mechanism (9); and a trigger mechanism (11) for automatically determining the falling speed of the accessory, wherein the trigger mechanism (11) is arranged in the buffer mechanism (9).

2. A polishing device for manufacturing mechanical parts according to claim 1, characterized in that: The buffer mechanism (9) comprises a special-shaped groove (91) provided in the vertical plate (4), and the special-shaped groove (91) is arranged close to the air pump (5), the special-shaped groove (91) is connected to the air suction end of the air pump (5), a lifting block (93) is provided on the side of the special-shaped groove (91) away from the air pump (5), and the lifting block (93) is slidably arranged in the vertical plate (4), a second air guide groove (94) is provided in the lifting block (93), an air guide groove (92) is provided in the vertical plate (4), one end of the air guide groove (92) is connected to the dust suction groove (8), and the other end of the air guide groove (92) is connected to the second air guide groove (94) through a slide groove where the lifting block (93) is located, the second air guide groove (94) is connected to the special-shaped groove (91), and the slide groove on the lower side of the lifting block (93) is connected to the outer side of the vertical plate (4).

3. A polishing device for manufacturing mechanical parts according to claim 2, characterized in that: The locking mechanism (10) comprises a limiting slot (101), and the limiting slot (101) is provided on the inner wall of the slide groove where the lifting block (93) is located, and a first plug rod (102) is inserted in the lifting block (93) for horizontal movement, and a second plug rod (104) is inserted in the lifting block (93) on one side of the first plug rod (102) for horizontal movement, and a second plug rod (104) is inserted in the lifting block (93) on the outer side of the second plug rod (104) for horizontal movement, and a sliding groove (103) is provided in the lifting block (93), and the sliding groove (103) ) side wall is provided with a ventilation groove (105), and the other end of the ventilation groove (105) is connected to the lower sliding groove of the lifting block (93), the opposite ends of the insertion rod (102) and the gear (107) are fixedly connected with external teeth (108), the gears (107) are meshed between the external teeth (108) on both sides, and the end of the insertion rod (104) away from the special-shaped groove (91) is fixedly connected to the limit rod (106), and the upper end of the limit rod (106) is provided with an inclined sliding surface (109).

4. A polishing device for manufacturing mechanical parts according to claim 1, characterized in that: The trigger mechanism (11) comprises a connecting plate (112), the connecting plate (112) being fixedly connected to the lifting block (93), and the connecting plate (112) being located at two opposite sides of the counterweight block (111), and counterweight blocks (111) being inserted up and down between the connecting plates (112) on both sides, and a placement groove (115) being surrounded between the upper part of one end of the counterweight block (111) close to the vertical plate (4) and the connecting plate (112), and a toggle block (113) being fixedly connected to one end of the vertical plate (4) close to the counterweight block (111), and the toggle block (113) being slidably arranged in the placement groove (115), and a non-Newtonian fluid being contained in the placement groove (115), and the lower end of the counterweight block (111) extending to the lower side of the connecting plate (112), and an extrusion head (114) being provided at the bottom end of the counterweight block (111).

5. A polishing device for manufacturing mechanical parts according to claim 2, characterized in that: The longitudinal cross-sectional area of ​​the special-shaped groove (91) gradually decreases from top to bottom.

6. A polishing device for manufacturing mechanical parts according to claim 1, characterized in that: The upper end of the lifting rail (7) is fixedly connected with an inserting plate (71), and the inserting plate (71) is inserted in the vertical plate (4) in a movable manner up and down. The air pump (5) is an air pump with a fixed flow rate.

7. A polishing device for manufacturing mechanical parts according to claim 3, characterized in that: The first insertion rod (102) and the second insertion rod (104) are both connected to the upper portion of the special-shaped groove (91).

8. The polishing device for manufacturing mechanical parts according to claim 4, characterized in that: The width of the toggle block (113) is smaller than the width of the placement groove (115).

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