Combined mechanical device for sheet metal machining

Abstract

The invention relates to the technical field of metal combined machining, and discloses a combined mechanical device for sheet metal machining, which comprises a combined machine tool, a linear motion track is horizontally arranged at the middle position of the upper end surface of the combined machine tool, and a sheet metal conveying tool is movably arranged in the linear motion track; the metal plate conveying tool comprises a tool base. Part of air in the corrugated air bag column is sucked, so that the corrugated air bag column shrinks and gets close to the middle from the two sides by taking the air bag positioning table as the center due to the negative pressure effect, and the first gravity sliding block and the second gravity sliding block are driven to move oppositely till the inner ring grinding block makes contact with the hole wall of the open hole through the convex face; according to the outer ring polishing block, the concave faces make contact with the outer surfaces of the smooth chamfers, the hole wall of the opening and the outer surfaces of the multiple sets of smooth chamfers are synchronously polished, the working efficiency is improved, the phenomenon that the polishing block is blocked during polishing is avoided through the flexible buffering effect of the air bag, and the smoothness is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of metal combined mechanical processing, and in particular to a combined mechanical device for sheet metal processing. Background Art

[0002] Sheet metal is a comprehensive cold working process for thin metal plates (typically less than 10mm thick). It boasts the technical advantages of light weight, high strength, high material utilization, and suitability for large-scale mass production. It is widely used in the automotive, electronics, construction, aerospace, and other fields. The main processing techniques for sheet metal parts include cutting (using tools such as lasers, plasma, and shears to split the sheet metal), stamping (using dies to punch, form, or bend the sheet metal to form a three-dimensional structure), and surface treatment (such as polishing and electroplating to enhance corrosion resistance and aesthetics). All of these processes require the use of a combination of mechanical devices.

[0003] The existing combined mechanical device has many technical defects when in use. First, during the transition period of stamping, cutting and grinding, manual unloading and loading of the processed sheet metal parts are required, which is time-consuming and labor-intensive, and the degree of automation of the entire combined mechanical device is low; second, when processing regular polyhedral sheet metal parts (centrally symmetrical), central opening and cutting of sharp chamfers are required. The existing combined mechanical device separates the two operations and uses different mechanisms to handle them, which results in a complex structure of the entire device and high cost of use; third, when grinding sheet metal parts, it is impossible to simultaneously process all cutting surfaces of the sheet metal parts at one time. At the same time, the grinding block lacks adjustment performance, resulting in poor grinding effect; fourth, the entire workshop will generate a large amount of dust residue due to the laser cutting and grinding processes, resulting in poor cleanliness of the device and workshop environment.

[0004] In summary, considering that the existing facilities cannot meet the work needs, we propose a combined mechanical device for sheet metal processing. Summary of the Invention

[0005] The main purpose of the present invention is to provide a combined mechanical device for sheet metal processing, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: The lifting mechanism is a pair of fixedly mounted on-ramps and a pair of fixedly mounted on-ramps for carrying out the movement of the lifting gear, and the supporting ram is connected with the fixedly mounted on-ramps to form a circuitous bearing on the supporting ram of the machine base.

[0007] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, a first liquid pressure rod is fixedly provided at the lower end of the lifting sleeve, the first liquid pressure rod extends upward from the interior of the first hydraulic cylinder, and a first oil chamber for the movement of the first liquid pressure rod is opened inside the first hydraulic cylinder, the lower end of the first liquid pressure rod is connected to the first oil plug that is slidably sealed with the first oil chamber, and a return spring that is sleeved on the outside of the first liquid pressure rod is fixed between the first oil plug and the inner wall of the first hydraulic cylinder.

[0008] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, a circular groove is provided at the center position of the upper end surface of the tooling seat, and a pressure-bearing circular block that fits with the inner wall of the circular groove is movably provided in the circular groove. A central discharge gap for metal scrap to be guided downward is formed between the circular groove and the pressure-bearing circular block. A second hydraulic rod is fixedly provided at the lower end of the pressure-bearing circular block, and the second hydraulic rod extends upward from the interior of the second hydraulic cylinder. A second oil chamber for the second hydraulic rod to move is provided in the interior of the second hydraulic cylinder, and the lower end of the second hydraulic rod is connected to a second oil plug that is slidably sealed with the second oil chamber.

[0009] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, wherein: a plurality of groups of chamfering grooves are evenly provided at the upper end of the workbench and between adjacent lifting limit grooves, the number of the chamfering grooves is preselected to be 4-8 groups, and each group of the chamfering grooves is movably provided with a pressure-bearing chamfering block that fits with the inner wall of the chamfering groove, and an edge discharge gap is formed between the chamfering groove and the pressure-bearing chamfering block for metal scrap to be guided downward, a third hydraulic rod is fixedly provided at the lower end of the pressure-bearing chamfering block, and the third hydraulic rod extends upward from the interior of the third hydraulic cylinder, and a third oil chamber for the movement of the third hydraulic rod is provided inside the third hydraulic cylinder, and the lower end of the third hydraulic rod is connected to a third oil plug that is slidingly sealed with the third oil chamber.

[0010] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, the bottoms of the adjacent first hydraulic cylinder and third hydraulic cylinder are connected by a No. 1 oil pipe, and the lower end of the second hydraulic cylinder is provided with a porous joint, and several groups of No. 2 oil pipes are installed on the porous joint, and several groups of No. 2 oil pipes are respectively connected to the bottom of the first hydraulic cylinder, and the number of No. 2 oil pipes is preferably 4-8 groups.

[0011] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, a dust suction motor is riveted at the lower position inside the workbench, a connecting cover is provided at the upper end of the dust suction motor, and several groups of air flow grooves are evenly distributed on the upper end of the connecting cover, and the number of the air flow grooves is preferably 4-6 groups. An elastic mounting platform is movably provided directly above the connecting cover, and several groups of guide columns are evenly welded on the bottom of the elastic mounting platform, and the number of the guide columns is preferably 3-4 groups. A guide groove for the guide column to move is provided inside the connecting cover, and a vibration spring is used between the bottom of the elastic mounting platform and the middle part of the connecting cover.

[0012] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, wherein: the upper end of the elastic mounting platform is provided with an arc positioning surface, and a fan-shaped filter cloth is fixedly provided at the position of the arc positioning surface. The cross-section of the fan-shaped filter cloth is conical, and the lower end edge of the fan-shaped filter cloth is evenly tied with several groups of elastic ropes, and the number of the elastic ropes is preferably 8-16 groups. A rope buckle connected to the elastic rope is installed on the annular inner wall of the work seat, and an arc-shaped discharge gap is formed between the fan-shaped filter cloth and the annular inner wall of the work seat, and a dust box is movably installed at the lower end of the arc-shaped discharge gap.

[0013] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, the upper end of the combined machine tool is provided with a stamping mechanism, a cutting mechanism and a grinding mechanism in sequence from left to right.

[0014] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, the stamping mechanism includes a stamping limit seat, the upper end face of the stamping limit seat is connected to the stamping cylinder through a bracket, a stamping rod is provided inside the stamping cylinder for downward movement, the lower end of the stamping rod is welded with a pressure plate acting on the regular polygonal sheet metal, the interior of the stamping limit seat is penetrated by a shock-absorbing guide port for the movement of the pressure plate, the lower end of the pressure plate is welded with a pressure column in contact with the upper end of the lifting sleeve, and the number of the pressure columns is preferably 4-8 groups.

[0015] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, the cutting mechanism includes a top seat, an annular limit shell is riveted on the lower end of the top seat, and a rotating groove for the movement of the turntable is provided at the bottom of the annular limit shell. A rotating shaft is welded at the middle position of the upper end of the turntable, and the rotating shaft is connected to the top seat through a bearing seat. A large gear is sleeved on the rotating shaft, and a small gear is meshed on one side of the large gear. The small gear is sleeved on the output shaft of the servo motor, and the large gear and the small gear are both located in the gear box.

[0016] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, an adjustment groove is downwardly opened inside the rotating table, a laser cutter is movably arranged in the adjustment groove, a moving block that fits with the adjustment groove is provided at the upper end of the laser cutter, a hydraulic adjustment rod is horizontally connected to the side of the laser cutter, the hydraulic adjustment rod extends horizontally outward from the inside of the hydraulic cylinder, the hydraulic cylinder is riveted to the inside of the rotating table, and a cutting head that acts on regular polygonal sheet metal is provided at the lower end of the laser cutter.

[0017] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, the grinding mechanism includes a lifting arm, a lifting drive device is installed at the lower end of the lifting arm, the upper end of the lifting arm is connected to a circular support seat, a grinding motor is vertically installed on the upper end surface of the circular support seat, the lower end of the grinding motor is connected to a rotating rod through a coupling, the rotating rod is connected to the circular support seat through an external bearing, a grinding table is fixed to the lower end of the rotating rod, a circular track is opened around the outer side surface of the grinding table, and a shock-absorbing sleeve acting on the circular track is riveted to the lower end of the circular support seat.

[0018] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, a first strip groove is opened in the center position of the grinding table, an inner ring connecting rod is movably arranged in the first strip groove, a gravity slider No. 1 is welded to the upper end of the inner ring connecting rod, the gravity slider No. 1 fits in with the top of the first strip groove, an inner ring grinding block is provided at the lower end of the inner ring connecting rod, a convex surface is provided on the side of the inner ring grinding block that interacts with the connecting hole of the regular polygonal sheet metal, a guide roller is rotatably provided at one end of the convex surface, a pressure sensing sheet is installed on the wheel surface of the guide roller, and a sensor is connected inwardly to the pressure sensing sheet.

[0019] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, a second strip groove is provided at the edge of the grinding table, an outer ring connecting rod is movably arranged in the second strip groove, a No. 2 gravity slider is welded to the upper end of the outer ring connecting rod, an outer ring grinding block is provided at the lower end of the outer ring grinding block, and a concave surface that acts as the chamfer of the regular polygonal sheet metal is provided on the side surface of the outer ring grinding block.

[0020] As a preferred solution of the combined mechanical device for sheet metal processing described in the present invention, wherein: the outer side surfaces of the No. 1 gravity slider and the No. 2 gravity slider are respectively connected to the groove walls of the first strip groove and the second strip groove by means of decompression springs, the number of the decompression springs is preferably 2-4 groups, the inner side surfaces of the No. 1 gravity slider and the No. 2 gravity slider are both installed with airbag sealing sleeves, a corrugated airbag column is arranged between the two groups of the airbag sealing sleeves, an airbag positioning platform is sleeved on the outer side of the middle part of the corrugated airbag column, an air pump acting on the corrugated airbag column is installed on one side of the airbag positioning platform, and a one-way air intake valve acting on the corrugated airbag column is installed on the other side of the airbag positioning platform, and the air pump and the one-way air intake valve are respectively linked to the sensor.

[0021] The present invention provides a combined mechanical device for sheet metal processing through improvements, which has the following significant improvements and advantages compared with the prior art: During the stamping process, several groups of pressure columns act downward on the corresponding lifting sleeves, pressing the lifting sleeves completely into the lifting limit grooves. Through a series of hydraulic transmissions, the third hydraulic rod moves upward to lift the pressure chamfered block, so that it moves to the top of the chamfered groove. The second hydraulic rod moves upward to lift the pressure round block, so that it moves to the top of the round groove. The pressure round block and multiple groups of pressure chamfered blocks play the role of pressure support, and cooperate with the pressure plate to stamp and shape the regular polygonal sheet metal, thereby improving the structural strength and high flexibility.

[0022] When the pressure plate returns to its upward position, the first hydraulic rod is driven to move upward by the compression force of the return spring. Through a series of hydraulic oil reflux, the third hydraulic rod moves downward to drive the pressure-bearing chamfered block to the bottom, leaking out the edge discharge gap. The second hydraulic rod moves downward to drive the pressure-bearing round block to the bottom, leaking out the center discharge gap. The edge discharge gap and the center discharge gap are both used for metal scrap and dust to be discharged downward, playing a role in auxiliary impurity removal.

[0023] When the hydraulic cylinder works, the hydraulic adjustment rod extends or retracts, driving the laser cutter to move along the adjustment slot toward the outer or inner side of the turntable. The cutting range of the laser cutter can be flexibly adjusted to improve the adaptability. The hole opening process and cutting chamfering process of regular polygonal sheet metal can be completed uniformly by this mechanism. The effective combination does not require separate operations, saving time and effort.

[0024] Let the vacuum pump work and suck out part of the gas in the corrugated airbag column, so that the corrugated airbag column shrinks from both sides to the middle with the airbag positioning platform as the center due to the negative pressure, thereby driving the No. 1 gravity slider and the No. 2 gravity slider to move toward each other, until the inner ring grinding block at the lower end contacts the hole wall of the opening with the convex surface, and at the same time, the outer ring grinding block at the lower end contacts the outer surface of the smooth chamfer with the concave surface, and the hole wall of the opening and several groups of smooth chamfered outer surfaces are synchronously polished respectively, thereby improving work efficiency, and avoiding jamming of the grinding block during grinding through the flexible buffering effect of the airbag, thereby improving smoothness, and using the pressure sensing sheet and the hole wall of the opening to generate contact force during the grinding process, measuring the pressure value, and the sensor commands the vacuum pump to pump air again, and continue to adjust the positions of the inner ring grinding block and the outer ring grinding block, thereby increasing the contact force and significantly improving the grinding effect.

[0025] The metal scraps slide downward through the central discharge gap and several groups of edge discharge gaps and fall onto the sector-shaped filter cloth. The impact causes the elastic mounting platform to vibrate, and the elastic expansion and contraction of several groups of elastic ropes cause the entire sector-shaped filter cloth to shake, shaking off the dust adsorbed on its surface and spreading it around until the dust overflows downward from several groups of arc-shaped discharge gaps and is collected in the dust collecting box, thereby maintaining the adsorption capacity of the sector-shaped filter cloth. At the same time, the metal scraps move downward on the inclined plane and also fall through several groups of arc-shaped discharge gaps and are collected by the dust collecting box, avoiding excessive interference with the work of the sector-shaped filter cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a combined mechanical device for sheet metal processing in one direction of the present invention; Figure 2 This is a schematic diagram of the overall structure of a combined mechanical device for sheet metal processing according to the present invention from another direction; Figure 3 Schematic diagram of the external structure of the sheet metal material transport tooling of the present invention; Figure 4 Schematic diagram of the specific structure of the upper end surface of the sheet metal material transport tooling of the present invention; Figure 5 This is a schematic diagram of the internal hydraulic structure connection of the tooling seat of the present invention; Figure 6 This is a schematic diagram of the oil pipe connection of the present invention; Figure 7 is a cross-sectional view of the hydraulic cylinder of the present invention; Figure 8 This is a schematic diagram of the internal structure of the lifting sleeve of the present invention; Figure 9 Schematic diagram of the dust collection structure inside the tooling seat of the present invention; Figure 10 This is a schematic diagram of the specific structure of the upper end of the dust collection motor of the present invention; Figure 11 It is a schematic diagram of the specific structure of the punching mechanism of the present invention; Figure 12 Schematic diagram of the external structure of the cutting mechanism of the present invention; Figure 13 Schematic diagram of the transmission structure of the rotating table of the present invention; Figure 14 This is a schematic diagram of the internal structure of the regulating tank of the present invention; Figure 15 Schematic diagram of the external structure of the grinding mechanism of the present invention; Figure 16 Schematic diagram of the external connection of the grinding table of the present invention; Figure 17 This is a schematic diagram of the structure of the grinding table in one direction of the present invention; Figure 18 This is a schematic structural diagram of the grinding table of the present invention from another direction.

[0027] In the figure: 1. modular machine tool; 2. linear motion track; 10. sheet metal material transport fixture; 11. fixture seat; 12. drive unit; 13. lifting limit groove; 14. lifting sleeve; 15. side displacement block; 16. extrusion spring; 17. limit stop column; 18. arc slide; 20. first hydraulic rod; 21. first hydraulic cylinder; 22. first oil chamber; 23. first oil plug; 24. return spring; 30. circular groove; 31. pressure-bearing circular block; 32. center discharge gap; 33. second hydraulic rod; 34. second hydraulic cylinder; 35. second oil chamber; 36. second oil plug; 40. chamfer groove; 41. pressure-bearing chamfering block; 42. edge discharge gap; 43. third hydraulic rod; 44. third hydraulic cylinder; 45. third oil chamber; 46. third oil plug; 47. No. 1 oil pipe; 48. multi-hole joint; 49. No. 2 oil pipe; 50. Vacuum motor; 51. Connecting cover; 52. Air flow slot; 53. Elastic mounting platform; 54. Guide column; 55. Guide slot; 56. Vibration spring; 60. Arc positioning surface; 61. Fan-shaped filter cloth; 62. Elastic rope; 63. Rope buckle; 64. Arc-shaped discharge gap; 3. Stamping mechanism; 70. Stamping limit seat; 71. Bracket; 72. Stamping cylinder; 73. Stamping rod; 74. Pressing plate; 75. Shock-absorbing guide port; 76. Pressing column; 4. Cutting mechanism; 80. Top seat; 81. Annular limiting housing; 82. Rotating groove; 83. Rotating table; 84. Rotating shaft; 85. Bearing seat; 86. Large gear; 87. Servo motor; 88. Small gear; 89. Gearbox; 90. Adjusting groove; 91. Moving block; 92. Laser cutter; 93. Hydraulic adjusting rod; 94. Hydraulic cylinder; 95. Cutting head; 5. Grinding mechanism; 100. Lifting arm; 101. Circular support seat; 102. Grinding motor; 103. Rotating rod; 104. Grinding table; 105. Outer bearing; 106. Annular track; 107. Shock-absorbing sleeve; 110. First strip groove; 111. Inner ring connecting rod; 112. Gravity slider No. 1; 113. Inner ring grinding block; 114. Convex surface; 115. Guide roller; 116. Pressure sensing sheet; 120. Second strip groove; 121. Outer ring connecting rod; 122. Gravity slider No. 2; 123. Outer ring grinding block; 124. Concave surface; 130. Decompression spring; 131. Airbag sealing sleeve; 132. Corrugated airbag column; 133. Airbag positioning table; 134. Vacuum pump; 135. One-way air intake valve. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] like Figures 1-18 As shown, this embodiment provides a combined mechanical device for sheet metal processing, including a combined machine tool 1, a linear motion track 2 is horizontally arranged at the middle position of the upper end surface of the combined machine tool 1, a sheet metal material transport tool 10 is movably arranged in the linear motion track 2, and the sheet metal material transport tool 10 includes a tool seat 11, and driving parts 12 that interact with the linear motion track 2 are symmetrically arranged on both sides of the tool seat 11. The driving part 12 can be a side driving wheel, which drives the sheet metal material transport tool 10 to move along the linear motion track 2.

[0030] Among them, the upper end surface of the tooling seat 11 is evenly provided with a plurality of groups of lifting limit grooves 13, which play the role of guiding and storing. A lifting sleeve 14 is movably provided in each group of lifting limit grooves 13 (the position of the lifting sleeve 14 is not on the circular motion path of the cutting head 95 and the outer ring grinding block 123), and a side displacement block 15 is movably provided on the inner side of the lifting sleeve 14. The side displacement block 15 is fixed by two groups of extrusion springs 16 and the inner wall of the lifting sleeve 14. A limiting stop column 17 in contact with the side edge of the regular polygonal sheet metal is fixed at one end of the side displacement block 15 away from the extrusion spring 16, and the upper end of the limiting stop column 17 is provided with an arc sliding portion 18, which has the effect of smooth transition, such as Figure 3 、 Figure 4 and Figure 8 shown.

[0031] Furthermore, a first hydraulic rod 20 is fixedly provided at the lower end of the lifting sleeve 14. The first hydraulic rod 20 extends upward from the interior of the first hydraulic cylinder 21. A first oil chamber 22 for the movement of the first hydraulic rod 20 is opened inside the first hydraulic cylinder 21. The lower end of the first hydraulic rod 20 is connected to a first oil plug 23 that is slidably sealed with the first oil chamber 22. A return spring 24 that is sleeved on the outer side of the first hydraulic rod 20 is fixed between the first oil plug 23 and the inner wall of the first hydraulic cylinder 21. Figure 5-Figure 7 shown.

[0032] A circular groove 30 is provided at the center of the upper end surface of the tooling seat 11. The size of the circular groove 30 is larger than the size of the metal scrap. A pressure-bearing round block 31 is movably provided in the circular groove 30 and fits in with the inner wall of the circular groove 30. A central discharge gap 32 (in the initial state) is formed between the circular groove 30 and the pressure-bearing round block 31 for the metal scrap to be guided downward. Figure 3 and Figure 4 shown.

[0033] Furthermore, a second hydraulic rod 33 is fixedly provided at the lower end of the pressure-bearing round block 31. The second hydraulic rod 33 extends upward from the interior of the second hydraulic cylinder 34. A second oil chamber 35 for the movement of the second hydraulic rod 33 is opened inside the second hydraulic cylinder 34. The lower end of the second hydraulic rod 33 is connected to a second oil plug 36 that is slidably sealed with the second oil chamber 35. Figure 5-Figure 7 shown.

[0034] Among them, the upper end of the tooling seat 11 is evenly provided with a plurality of groups of chamfering grooves 40 between adjacent lifting limit grooves 13. The size of the chamfering grooves 40 is larger than the size of the metal scrap. A pressure-bearing chamfering block 41 that fits the inner wall of the chamfering groove 40 is movably provided in each group of chamfering grooves 40. An edge discharge gap 42 (in the initial state) is formed between the chamfering grooves 40 and the pressure-bearing chamfering blocks 41 for the metal scrap to be guided downward. Figure 3 and Figure 4 shown.

[0035] Furthermore, a third hydraulic rod 43 is fixedly provided at the lower end of the pressure chamfering block 41. The third hydraulic rod 43 extends upward from the interior of a third hydraulic cylinder 44. A third oil chamber 45 for the movement of the third hydraulic rod 43 is provided inside the third hydraulic cylinder 44. The lower end of the third hydraulic rod 43 is connected to a third oil plug 46 that is slidably sealed with the third oil chamber 45. Figure 5-Figure 7 shown.

[0036] In this embodiment, the bottoms of the adjacent first hydraulic cylinder 21 and the third hydraulic cylinder 44 are connected by a No. 1 oil pipe 47. The lower end of the second hydraulic cylinder 34 is provided with a porous joint 48. A plurality of groups of No. 2 oil pipes 49 are installed on the porous joint 48. The plurality of groups of No. 2 oil pipes 49 are respectively connected to the bottom of the first hydraulic cylinder 21. Figure 5-Figure 7 shown.

[0037] Furthermore, the upper end of the modular machine tool 1 is provided with a punching mechanism 3, a cutting mechanism 4 and a grinding mechanism 5 in sequence from left to right, as shown in FIG. Figure 1 and Figure 2 shown.

[0038] The stamping mechanism 3 includes a stamping limit seat 70, such as Figure 1 and Figure 2 shown.

[0039] The upper end surface of the stamping limit seat 70 is connected to the stamping cylinder 72 through the bracket 71. The interior of the stamping cylinder 72 is provided with a stamping rod 73 for downward movement. The lower end of the stamping rod 73 is welded with a pressure plate 74 that acts on the regular polygonal sheet metal. The interior of the stamping limit seat 70 is penetrated by a shock-absorbing guide port 75 for the movement of the pressure plate 74. The shock-absorbing guide port 75 plays the role of a limiting guide. The lower end of the pressure plate 74 is welded with a pressure column 76 that contacts the upper end of the lifting sleeve 14. The size of the pressure column 76 is designed according to actual conditions, such as Figure 11 shown.

[0040] When this embodiment is in use, the regular polygonal sheet metal to be processed is placed in the center position of the upper end surface of the tooling seat 11, and a number of groups of limit stops 17 are used to contact the middle position of each edge (the limit stops 17 can be elastically extended) to effectively position the regular polygonal sheet metal. Then, the sheet metal transport tooling 10 is allowed to move straight to the right on the linear motion track 2 and stop in the area of ​​the stamping mechanism 3, so that the regular polygonal sheet metal is aligned with the pressing plate 74.

[0041] At this time, the punching cylinder 72 is started, and the punching rod 73 descends at a high speed, driving the pressure plate 74 to punch downward along the shock-absorbing guide port 75. During the punching process, several groups of pressure columns 76 act downward on the corresponding lifting sleeves 14, pressing the lifting sleeves 14 completely into the lifting limit grooves 13, so that the first pressure rod 20 drives the first oil plug 23 to move downward in the first oil chamber 22, squeezing the hydraulic oil in the first oil chamber 22 into the corresponding oil pipes 47 and 49 respectively. In the third hydraulic cylinder 44 and the second hydraulic cylinder 34, the third oil chamber 45 of the third hydraulic cylinder 44 is filled with oil, and the third hydraulic rod 43 moves upward to lift the pressure chamfering block 41, so that it moves to the top of the chamfering groove 40 and is flush with the upper end surface of the tooling seat 11. The second oil chamber 35 of the second hydraulic cylinder 34 is simultaneously filled with oil by several groups of No. 2 oil pipes 49, and the second hydraulic rod 33 moves upward to lift the pressure round block 31, so that it moves to the top of the circular groove 30 and is flush with the upper end surface of the tooling seat 11.

[0042] When the pressing plate 74 is completely pressed on the regular polygonal sheet metal, the pressure-bearing circular block 31 and the multiple groups of pressure-bearing chamfered blocks 41 play the role of pressure support, cooperating with the pressing plate 74 to stamp and shape the regular polygonal sheet metal to improve the structural strength. When the pressing plate 74 returns to its original position, the first pressure rod 20 is driven upward by the compressed elastic force of the return spring 24. Due to the negative pressure, the hydraulic oil in the third oil chamber 45 and the second oil chamber 35 flows back to the first oil chamber 22 through the oil pipe. During the upward movement of the limit stop post 17, the arc sliding portion 18 contacts the edge of the regular polygonal sheet metal, exerting an extrusion effect on the limit stop post 17, causing the side displacement block 15 to move and contract in the lifting sleeve 14 (the extrusion spring 16 is slightly compressed) until each group of limit stop posts 17 again contacts the middle position of each edge (the area of ​​the regular polygonal sheet metal changes slightly after being stamped), and no manual assembly is required.

[0043] The cutting mechanism 4 includes a top seat 80, such as Figure 1 and Figure 2 shown.

[0044] In this embodiment, the lower end of the top seat 80 is riveted with an annular limiting shell 81, and the bottom of the annular limiting shell 81 is provided with a rotating groove 82 for the movement of the rotating platform 83. The surface of the rotating groove 82 is smooth and plays the role of limiting and supporting. A rotating shaft 84 is welded at the middle position of the upper end of the rotating platform 83. The rotating shaft 84 is connected to the top seat 80 through a bearing seat 85. Figure 12 and Figure 13 shown.

[0045] Among them, a large gear 86 is sleeved on the rotating shaft 84, and a small gear 88 is meshed on one side of the large gear 86. The small gear 88 is sleeved on the output shaft of the servo motor 87. The large gear 86 and the small gear 88 are both located in the gear box 89. Figure 2 and Figure 13 shown.

[0046] Furthermore, an adjustment slot 90 is provided downwardly inside the rotating table 83, and a laser cutter 92 is movably provided in the adjustment slot 90. A moving block 91 is provided on the upper end of the laser cutter 92 and is fitted with the adjustment slot 90. The moving block 91 plays the role of limiting movement. Figure 12-14 shown.

[0047] In this embodiment, the side of the laser cutter 92 is horizontally connected to a hydraulic adjustment rod 93, which extends horizontally outward from the inside of a hydraulic cylinder 94. The hydraulic cylinder 94 is riveted to the inside of the rotating table 83. The lower end of the laser cutter 92 is provided with a cutting head 95 that acts on regular polygonal sheet metal. Figure 14 shown.

[0048] Furthermore, a dust collecting motor 50 is riveted to the lower part of the tooling seat 11, and a connecting cover 51 is provided on the upper end of the dust collecting motor 50. Figure 9 and Figure 10 shown.

[0049] Specifically, a plurality of groups of air flow grooves 52 are evenly distributed on the upper end of the connecting cover 51. The air flow grooves 52 are used for the flow of air. An elastic mounting platform 53 is movably provided just above the connecting cover 51. A plurality of groups of guide columns 54 are evenly welded on the bottom of the elastic mounting platform 53. A guide groove 55 for the guide column 54 to move is provided inside the connecting cover 51. The guide groove 55 plays a role of limiting and guiding. A vibration spring 56 is used between the bottom of the elastic mounting platform 53 and the middle of the connecting cover 51. The vibration spring 56 has high sensitivity. Figure 10 shown.

[0050] Among them, the upper end of the elastic mounting platform 53 is provided with an arc positioning surface 60, and a fan-shaped filter cloth 61 is fixedly provided at the position of the arc positioning surface 60. The cross-section of the fan-shaped filter cloth 61 is conical, and it is inclined and divergent from the center to the surrounding areas. The lower end edge of the fan-shaped filter cloth 61 is evenly tied with a number of groups of elastic ropes 62. A rope buckle 63 connected to the elastic rope 62 is installed on the annular inner wall of the tooling seat 11. An arc-shaped discharge gap 64 is formed between the fan-shaped filter cloth 61 and the annular inner wall of the tooling seat 11. The expansion and contraction of the elastic rope 62 will cause the area of ​​the arc-shaped discharge gap 64 to change. The lower end of the arc-shaped discharge gap 64 is movably installed with a dust collecting box, such as Figure 9 and Figure 10 shown.

[0051] When this embodiment is in use, the sheet metal material transport tooling 10 is then allowed to move linearly to the right on the linear motion track 2, stop in the cutting mechanism 4 area, align the center of the regular polygonal sheet metal with the cutting head 95, first start the servo motor 87, and the small gear 88 rotates, causing the large gear 86 to slow down through the meshing action, and the rotating shaft 84 drives the rotating table 83 to make a circular motion. The laser cutter 92 works, and the cutting head 95 is used to make a circular motion to laser open a hole in the middle position of the regular polygonal sheet metal. Then the hydraulic cylinder 94 works, and the hydraulic adjustment rod 93 extends, driving the laser cutter 92 to move along the adjustment slot 90 toward the outer side surface of the rotating table 83, expanding the cutting range of the laser cutter 92, so that each chamfer of the regular polygonal sheet metal is within the cutting range. At this time, the cutting head 95 moves one circle, and laser cutting is performed on each chamfer of the regular polygonal sheet metal to form a smooth chamfer.

[0052] During the cutting process, the dust collection motor 50 is started to generate suction, so that the dust generated by the laser cutting passes through the central discharge gap 32 (the pressure-bearing round block 31 is located below the circular groove 30) and the plurality of edge discharge gaps 42 (the pressure-bearing chamfering blocks 41 are located below the chamfering grooves 40) and is sucked into the interior of the tooling seat 11. When passing through the fan-shaped filter cloth 61, the dust is adsorbed on the fan-shaped filter cloth 61, which plays a role in intercepting and collecting dust. After that, the metal waste generated by the cutting (opening waste and chamfering waste) falls into the circular groove 30 and the chamfering groove 40 respectively, and passes through the central discharge gap 32 and the plurality of edge discharge gaps 42. It slides downward and falls onto the fan-shaped filter cloth 61. The impact causes the elastic mounting platform 53 to vibrate, and the elastic expansion and contraction of several groups of elastic ropes 62 cause the entire fan-shaped filter cloth 61 to shake, shaking out the dust adsorbed on its surface (dust accumulated during the cutting and subsequent grinding process) and spreading it around until the dust overflows downward from several groups of arc-shaped discharge gaps 64 (the result of multiple rounds of metal scrap impact) and is collected in the dust collection box, thereby maintaining the adsorption capacity of the fan-shaped filter cloth 61. At the same time, the metal scrap moves downward on the inclined surface and also falls through several groups of arc-shaped discharge gaps 64 and is collected by the dust collection box.

[0053] The grinding mechanism 5 includes a lifting arm 100, such as Figure 2 and Figure 15 .

[0054] In this embodiment, a lifting drive device is installed at the lower end of the lifting arm 100, and the lifting drive device can be a lifting cylinder. The upper end of the lifting arm 100 is connected to a circular support seat 101, and a grinding motor 102 is vertically installed on the upper end surface of the circular support seat 101. The lower end of the grinding motor 102 is connected to a rotating rod 103 through a coupling. The rotating rod 103 is connected to the circular support seat 101 through an outer bearing 105. The lower end of the rotating rod 103 is fixed with a grinding table 104. Figure 15 and Figure 16 shown.

[0055] Furthermore, a circular track 106 is provided around the outer side of the grinding table 104. A shock-absorbing sleeve 107 is riveted to the lower end of the circular support seat 101 and acts on the circular track 106. The shock-absorbing sleeve 107 plays the role of limiting the guide. The grinding table 104 moves around the shock-absorbing sleeve 107. Figure 15 and Figure 16 shown.

[0056] In this embodiment, a first strip groove 110 is provided in the center of the grinding table 104. An inner ring connecting rod 111 is movably provided in the first strip groove 110. A gravity slider 112 is welded to the upper end of the inner ring connecting rod 111. The gravity slider 112 fits in with the top of the first strip groove 110. The gravity slider 112 plays a role of limiting sliding. Figures 15-18shown.

[0057] Specifically, the lower end of the inner ring connecting rod 111 is provided with an inner ring grinding block 113, and the side of the inner ring grinding block 113 is provided with a convex surface 114 that interacts with the connecting hole of the regular polygonal sheet metal. A guide roller 115 is rotatably provided at one end of the convex surface 114. The guide roller 115 plays a role of guiding rolling. A pressure sensing sheet 116 is installed on the wheel surface of the guide roller 115. The pressure sensing sheet 116 is located at a part of the wheel surface and generates a relative force when it intermittently contacts the hole wall of the connecting hole. The pressure sensing sheet 116 is connected inwardly with a sensor, such as Figure 17 and Figure 18 shown.

[0058] In this embodiment, a second strip groove 120 is provided at the side of the grinding table 104, and an outer ring connecting rod 121 is movably provided in the second strip groove 120. The outer ring connecting rod 121 and the inner ring connecting rod 111 are on the same horizontal plane. A second gravity slider 122 is welded to the upper end of the outer ring connecting rod 121. The second gravity slider 122 is matched with the top of the second strip groove 120, and the second gravity slider 122 plays the role of limiting sliding. Figures 15-18 shown.

[0059] Specifically, the lower end of the outer ring connecting rod 121 is provided with an outer ring grinding block 123, and the side of the outer ring grinding block 123 is provided with a concave surface 124 that interacts with the chamfer of the regular polygonal sheet metal. Figure 17 and Figure 18 shown.

[0060] Furthermore, the outer side surfaces of the first gravity slider 112 and the second gravity slider 122 are connected to the groove walls of the first strip groove 110 and the second strip groove 120 respectively by means of a decompression spring 130. The inner side surfaces of the first gravity slider 112 and the second gravity slider 122 are both installed with airbag sealing sleeves 131 to play a connecting and sealing role. A corrugated airbag column 132 is provided between the two sets of airbag sealing sleeves 131. The corrugated airbag column 132 has a corrugated columnar structure and has a deformation reset performance. The specific strength can be designed according to actual conditions, such as Figure 17 and Figure 18 shown.

[0061] Specifically, an airbag positioning platform 133 is sleeved on the outer side of the middle part of the corrugated airbag column 132, and an air pump 134 acting on the corrugated airbag column 132 is installed on one side of the airbag positioning platform 133. A one-way air inlet valve 135 acting on the corrugated airbag column 132 is installed on the other side of the airbag positioning platform 133. The air pump 134 and the one-way air inlet valve 135 are respectively linked to sensors, such as Figure 17 and Figure 18 shown.

[0062] When this embodiment is in use, the sheet metal material transport tooling 10 is then allowed to continue moving to the right on the linear motion track 2, and stops in the area of ​​the grinding mechanism 5. The lifting drive device is then operated to drive the lifting arm 100 and the circular support seat 101 to move downward, so that the inner ring grinding block 113 is located at the opening position of the regular polygonal sheet metal, and the outer ring grinding block 123 is located at one of the sets of smooth chamfer positions of the regular polygonal sheet metal. At this time, the grinding motor 102 is operated, and the rotating rod 103 drives the grinding table 104 to rotate, so that the inner ring grinding block 113 and the outer ring grinding block 123 perform circular motion at the same time.

[0063] Then let the vacuum pump 134 work to suck out part of the gas in the corrugated airbag column 132, so that the corrugated airbag column 132 shrinks from both sides to the middle with the airbag positioning platform 133 as the center due to the negative pressure, thereby driving the first gravity slider 112 and the second gravity slider 122 to move toward each other (the decompression spring 130 is stretched in this process), until the inner ring grinding block 113 at the lower end contacts the hole wall of the opening with the convex surface 114, and at the same time, the outer ring grinding block 123 at the lower end contacts the outer surface of the smooth chamfer with the concave surface 124. Under the action of rapid circular motion, the grinding blocks , the hole wall of the opening and the outer surfaces of several groups of smooth chamfers are polished synchronously respectively. During the polishing process, the pressure sensing sheet 116 is used to generate contact force with the hole wall of the opening to measure the pressure value. When the pressure value decreases to a certain extent (the polishing surface becomes thinner), the sensor commands the vacuum pump 134 to pump air again, and continues to adjust the position of the inner ring polishing block 113 and the outer ring polishing block 123 to increase the contact force and improve the polishing effect. The waste generated by polishing is sucked into the interior of the workpiece 11 through the central discharge gap 32 and the edge discharge gap 42, so as to achieve the purpose of timely collection.

[0064] After the grinding is completed, the one-way air inlet valve 135 is opened. Due to the deformation restoration effect of the corrugated airbag column 132 and the pressure difference between the inside and the outside, the corrugated airbag column 132 swells again after taking in air, and the contraction force of the decompression spring 130 after stretching pushes the No. 1 gravity slider 112 and the No. 2 gravity slider 122 to do opposite movements, thereby achieving the purpose of returning to their original position.

[0065] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0066] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A combined mechanical device for sheet metal processing, comprising a combined machine tool (1), characterized in that The upper end of the combined machine tool (1) is provided with a punching mechanism (3), a cutting mechanism (4) and a grinding mechanism (5) in sequence from left to right, the grinding mechanism (5) comprising a grinding table (104), a first strip groove (110) being provided at a center position of the grinding table (104), an inner ring connecting rod (111) being movably provided in the first strip groove (110), a gravity slider (112) being welded to the upper end of the inner ring connecting rod (111), an inner ring grinding block (113) being provided at the lower end of the inner ring connecting rod (111), a convex surface (114) being provided on the side surface of the inner ring grinding block (113) interacting with the connecting hole of the regular polygonal sheet metal, a guide roller (115) being rotatably provided at one end of the convex surface (114), a pressure sensing sheet (116) being installed on the wheel surface of the guide roller (115); A second strip groove (120) is provided at the side of the grinding table (104), an outer ring connecting rod (121) is movably provided in the second strip groove (120), a second gravity slider (122) is welded to the upper end of the outer ring connecting rod (121), an outer ring grinding block (123) is provided at the lower end of the outer ring connecting rod (121), and a concave surface (124) for chamfering a regular polygonal sheet metal is provided on the side of the outer ring grinding block (123); The outer side surfaces of the first gravity slider (112) and the second gravity slider (122) are connected to the groove walls of the first strip groove (110) and the second strip groove (120) respectively by means of a decompression spring (130); the inner side surfaces of the first gravity slider (112) and the second gravity slider (122) are both installed with airbag sealing sleeves (131); a corrugated airbag column (132) is provided between the two groups of the airbag sealing sleeves (131); an airbag positioning platform (133) is sleeved on the outer side of the middle portion of the corrugated airbag column (132); an air pump (134) acting on the corrugated airbag column (132) is installed on one side of the airbag positioning platform (133); and a one-way air inlet valve (135) acting on the corrugated airbag column (132) is installed on the other side of the airbag positioning platform (133).

2. A combined mechanical device for sheet metal processing according to claim 1, characterized in that: A linear motion track (2) is horizontally arranged at the middle position of the upper end surface of the modular machine tool (1), and a sheet metal material transport tool (10) is movably arranged in the linear motion track (2). The sheet metal material transport tool (10) includes a tool seat (11), and driving parts (12) that interact with the linear motion track (2) are symmetrically arranged on both sides of the tool seat (11). The upper end surface of the tool seat (11) is evenly provided with a plurality of groups of lifting limit slots (13), and each group of the lifting limit slots A lifting sleeve (14) is movably provided in each of the positioning slots (13); a side displacement block (15) is movably provided on the inner side surface of the lifting sleeve (14); the side displacement block (15) is fixed by two sets of extrusion springs (16) and the inner wall of the lifting sleeve (14); a limiting stop column (17) in contact with the side of the regular polygonal sheet metal is fixedly provided at one end of the side displacement block (15) away from the extrusion spring (16); and an arc sliding portion (18) is provided at the upper end of the limiting stop column (17).

3. The combined mechanical device for sheet metal processing according to claim 2, characterized in that: A first liquid pressure rod (20) is fixedly provided at the lower end of the lifting sleeve (14), and the first liquid pressure rod (20) extends upward from the interior of the first hydraulic cylinder (21). A first oil chamber (22) for the movement of the first liquid pressure rod (20) is provided inside the first hydraulic cylinder (21). The lower end of the first liquid pressure rod (20) is connected to a first oil plug (23) that is slidably sealed with the first oil chamber (22). A return spring (24) that is sleeved on the outside of the first liquid pressure rod (20) is fixed between the first oil plug (23) and the inner wall of the first hydraulic cylinder (21).

4. The combined mechanical device for sheet metal processing according to claim 3, characterized in that: A circular groove (30) is provided at the center of the upper end surface of the tooling seat (11), a pressure-bearing circular block (31) is movably provided in the circular groove (30) and is fitted with the inner wall of the circular groove (30), a central discharge gap (32) for metal scrap to be discharged downward is formed between the circular groove (30) and the pressure-bearing circular block (31), a second hydraulic rod (33) is fixedly provided at the lower end of the pressure-bearing circular block (31), the second hydraulic rod (33) extends upward from the interior of the second hydraulic cylinder (34), a second oil chamber (35) for the second hydraulic rod (33) to move is provided in the interior of the second hydraulic cylinder (34), and the lower end of the second hydraulic rod (33) is connected to a second oil plug (36) that is slidably sealed with the second oil chamber (35); A plurality of groups of chamfering grooves (40) are evenly provided at the upper end of the tooling seat (11) and between adjacent lifting limit grooves (13). A pressure-bearing chamfering block (41) that fits the inner wall of the chamfering groove (40) is movably provided in each group of the chamfering grooves (40). An edge discharge gap (42) for metal scrap to be guided downward is formed between the chamfering grooves (40) and the pressure-bearing chamfering block (41). A third hydraulic rod (43) is fixedly provided at the lower end of the pressure-bearing chamfering block (41). The third hydraulic rod (43) extends upward from the interior of a third hydraulic cylinder (44). A third oil chamber (45) for the third hydraulic rod (43) to move is provided in the interior of the third hydraulic cylinder (44). The lower end of the third hydraulic rod (43) is connected to a third oil plug (46) that is slidably sealed with the third oil chamber (45).

5. The combined mechanical device for sheet metal processing according to claim 4, characterized in that: The bottoms of the adjacent first hydraulic cylinder (21) and the third hydraulic cylinder (44) are connected by a No. 1 oil pipe (47). The lower end of the second hydraulic cylinder (34) is provided with a porous joint (48). A plurality of groups of No. 2 oil pipes (49) are installed on the porous joint (48). The plurality of groups of No. 2 oil pipes (49) are respectively connected to the bottom of the first hydraulic cylinder (21).

6. The combined mechanical device for sheet metal processing according to claim 5, characterized in that: A dust collecting motor (50) is riveted to the lower part of the interior of the tooling seat (11), a connecting cover (51) is provided at the upper end of the dust collecting motor (50), a plurality of groups of air flow slots (52) are evenly distributed on the upper end of the connecting cover (51), an elastic mounting platform (53) is movably provided just above the connecting cover (51), a plurality of groups of guide columns (54) are evenly welded to the bottom of the elastic mounting platform (53), a guide groove (55) for the guide column (54) to move is provided inside the connecting cover (51), and a vibration spring (56) is used between the bottom of the elastic mounting platform (53) and the middle of the connecting cover (51); The upper end of the elastic mounting platform (53) is provided with an arc positioning surface (60), and a fan-shaped filter cloth (61) is fixedly provided on the position of the arc positioning surface (60). The cross section of the fan-shaped filter cloth (61) is conical, and the lower end edge of the fan-shaped filter cloth (61) is evenly tied with a plurality of groups of elastic ropes (62). A rope buckle (63) connected to the elastic rope (62) is installed at the position of the annular inner wall of the tooling seat (11), and an arc-shaped discharge gap (64) is formed between the fan-shaped filter cloth (61) and the annular inner wall of the tooling seat (11). A dust collecting box is movably installed at the lower end of the arc-shaped discharge gap (64).

7. The combined mechanical device for sheet metal processing according to claim 6, characterized in that: The stamping mechanism (3) includes a stamping limit seat (70), the upper end surface of the stamping limit seat (70) is connected to a stamping cylinder (72) through a bracket (71), a stamping rod (73) is provided inside the stamping cylinder (72) for downward movement, the lower end of the stamping rod (73) is welded with a pressure plate (74) that acts on a regular polygonal sheet metal, the interior of the stamping limit seat (70) is penetrated by a shock-absorbing guide port (75) for the pressure plate (74) to move, and the lower end of the pressure plate (74) is welded with a pressure column (76) that contacts the upper end of the lifting sleeve (14).

8. The combined mechanical device for sheet metal processing according to claim 6, characterized in that: The cutting mechanism (4) includes a top seat (80), a ring-shaped limiting shell (81) is riveted on the lower end of the top seat (80), a rotating groove (82) for the rotating table (83) to move is provided at the bottom of the ring-shaped limiting shell (81), a rotating shaft (84) is welded at the middle position of the upper end of the rotating table (83), the rotating shaft (84) is connected to the top seat (80) through a bearing seat (85), a large gear (86) is sleeved on the rotating shaft (84), a small gear (88) is meshed with one side of the large gear (86), the small gear (88) is sleeved on the output shaft of the servo motor (87), and the large gear (86) and the small gear (88) are both located in a gear box (89).

9. The combined mechanical device for sheet metal processing according to claim 8, characterized in that: An adjustment slot (90) is provided downwardly inside the rotating table (83), and a laser cutter (92) is movably provided in the adjustment slot (90). A moving block (91) that fits in the adjustment slot (90) is provided at the upper end of the laser cutter (92). A hydraulic adjustment rod (93) is horizontally connected to the side of the laser cutter (92), and the hydraulic adjustment rod (93) extends horizontally outward from the inside of a hydraulic cylinder (94). The hydraulic cylinder (94) is riveted to the inside of the rotating table (83). A cutting head (95) that acts on a regular polygonal sheet metal is provided at the lower end of the laser cutter (92).

10. The combined mechanical device for sheet metal processing according to claim 6, characterized in that: The grinding mechanism (5) further comprises a lifting arm (100), wherein a lifting drive device is installed at the lower end of the lifting arm (100), the upper end of the lifting arm (100) is connected to a circular support seat (101), a grinding motor (102) is vertically installed on the upper end surface of the circular support seat (101), the lower end of the grinding motor (102) is connected to a rotating rod (103) via a coupling, the rotating rod (103) is connected to the circular support seat (101) via an outer bearing (105), a grinding table (104) is fixed to the lower end of the rotating rod (103), a circular track (106) is provided around the outer side surface of the grinding table (104), and a shock-absorbing sleeve (107) acting on the circular track (106) is riveted to the lower end of the circular support seat (101); The first gravity slider (112) is matched with the top of the first strip groove (110), the second gravity slider (122) is matched with the top of the second strip groove (120), the pressure sensing sheet (116) is connected inwardly with a sensor, and the air pump (134) and the one-way air inlet valve (135) are respectively linked to the sensor.

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