Connector inner hole grinding device and machining process thereof

Abstract

The invention relates to the technical field of connector machining, and discloses a connector inner hole grinding device and a machining process thereof.The connector inner hole grinding device comprises a shell body, the shell body comprises a cabinet body and a workbench arranged on the top face of the cabinet body, and a grinding assembly used for grinding different connector inner holes is arranged above the workbench; according to the device, connectors with different inner diameters and boundary dimensions can be adapted through the adjustable grinding assembly and the positioning assembly, accurate positioning of a grinding rod is ensured through scale matching of a first pointer and a first ruler plate, the limitation that traditional equipment can only conduct single-specification machining is overcome, and the machining efficiency is improved. By adopting a flexible exhaust pipe, an adjustable angle and a detachable filtering cloth bag, grinding scraps are effectively collected, secondary pollution is avoided, meanwhile, the working environment is kept clean, rapid model changing and parameter calibration are achieved through a third pointer, a third ruler plate and a grinding rod fixed through a bolt, the machining consistency of products of the same batch is guaranteed, and the yield is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of connector processing, and specifically provides a connector inner hole grinding device and its processing technology. Background Art

[0002] A connector is an important component for connecting signal or energy transmission between electronic devices and is widely used in fields such as communication, computers, automobiles, aerospace, medical, and military. The inner hole of the connector is one of the core components of the connector, and its dimensional accuracy and surface quality directly affect performance indicators such as the contact resistance, insertion and extraction force, corrosion resistance, wear resistance, and electromagnetic interference resistance of the connector, thereby affecting the reliability and lifespan of the connector. Therefore, improving the processing quality of the connector inner hole is one of the key technologies for enhancing the performance and competitiveness of the connector.

[0003] After retrieval, a Chinese patent with the publication number CN221833950U discloses a connector inner hole grinding device, including a mounting bracket. The upper surface of the mounting bracket is provided with a workbench, and a base rail is arranged on the workbench. A bearing plate seat is slidably arranged on the base rail, etc., which has flexibility and adaptability and can efficiently and accurately complete the grinding tasks of various connector inner holes. However, there are still the following problems: 1. When grinding connectors with different inner diameters, it is necessary to rely on replacing the grinding head with the corresponding diameter for grinding, which is not only complex in operation but also high in cost; 2. In order to facilitate the subsequent assembly of the connector, chamfering of the connector is required. In the prior art, another machine is still needed for chamfering, resulting in low efficiency; 3. When grinding in batches, it is difficult to position and clamp a batch of identical connectors in the prior art, and repositioning is required each time for clamping, making the operation rather cumbersome. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a connector inner hole grinding device and its processing technology, mainly to solve the problem of adapting to connectors with different inner diameters and outer dimensions.

[0005] To achieve the above object, the present invention provides the following technical solutions: A connector inner hole grinding device includes a housing main body. The housing main body includes a cabinet body and a workbench arranged on the top surface of the cabinet body. Above the workbench, a grinding assembly is provided for grinding the inner holes of different connectors. Above the workbench, at a position to the right of the grinding assembly, a positioning assembly is provided for clamping different connectors. Above the workbench, at a position in front of the positioning assembly, a double chamfering assembly is provided for chamfering the inner and outer edges of the connector hole simultaneously. Inside the cabinet body, a dust suction assembly is provided for sucking out the debris in the connector inner hole.

[0006] Further, the grinding assembly includes a ball screw slide module installed on the bottom surface of the workbench. A connecting platform is arranged above the workbench. The slide of the ball screw slide module penetrates the surface of the workbench and is fixedly connected to the connecting platform. A first stepping motor is installed on the top surface of the connecting platform. The output shaft of the first stepping motor is fixedly connected to a connecting shaft through a coupling. One end of the connecting shaft away from the first stepping motor is fixedly connected to a first positioning disk through bolts. A slideway is opened inside the first positioning disk. A limiting frame is arranged inside the slideway. The limiting frame is slidably connected to the first positioning disk through the slideway. A positioning cylinder is arranged inside the limiting frame. A grinding rod is installed inside the positioning cylinder through bolts. A fixing plate is fixedly connected to the surface of the limiting frame. A first screw rod is threadedly connected inside the fixing plate. One end of the first screw rod facing the first positioning disk is fixedly connected to a rubber ball. A friction groove is opened at a position corresponding to the rubber ball on the first positioning disk. The rubber ball is inserted into the friction groove. A first scale plate is fixedly connected to the surface of the first positioning disk. A first pointer is rotatably connected to the surface of the positioning cylinder. A limiting mechanism is arranged inside the limiting frame.

[0007] Further, the limiting mechanism includes a positioning slider slidably connected inside the limiting frame. The positioning cylinder is inserted into the positioning slider and is rotatably connected thereto. A second screw rod is rotatably connected to the surface of the positioning slider. The second screw rod is threadedly connected to the limiting frame. One end of the second screw rod away from the positioning slider is fixedly connected to a first gear. A second gear is meshed with the surface of the first gear. The second gear is rotatably connected to the positioning slider through a bracket. A second pointer is fixedly connected to the surface of the positioning slider. A second scale plate is fixedly connected to the surface of the limiting frame. A linkage mechanism for rotating the positioning cylinder is arranged on the surface of the positioning cylinder.

[0008] Further, the linkage mechanism includes a second synchronous pulley fixedly connected to the surface of the positioning cylinder. The surface of the second synchronous pulley is meshed and connected with a first synchronous pulley through a synchronous belt. The first synchronous pulley is sleeved on the surface of the connecting shaft. An external gear is rotatably connected to the surface of the connecting shaft. The external gear is fixedly connected with the first synchronous pulley. A third connecting frame is rotatably connected to the surface of the connecting shaft. The third connecting frame is slidably connected with the workbench. A positioning plate is fixedly connected to the surface of the third connecting frame. An internal gear is fixedly connected to the inside of the positioning plate. The internal gear is meshed and connected with the first synchronous pulley. A positioning frame is fixedly connected to the surface of the connecting shaft. A limiting slider is slidably connected to the inside of the positioning frame. A third synchronous pulley is rotatably connected to the inside of the limiting slider. The third synchronous pulley is meshed and connected with the synchronous belt. A first spring is arranged inside the positioning frame. Two ends of the first spring are respectively fixedly connected with the positioning frame and the limiting slider.

[0009] Further, the positioning assembly includes a turntable arranged on the top surface of the workbench. The turntable is rotatably connected with the workbench. A first connecting frame is fixedly connected to the top surface of the turntable through bolts. Two V-shaped clamping blocks are symmetrically arranged on the top surface of the first connecting frame. A bidirectional lead screw is rotatably connected to the bottom surface of the first connecting frame through a bracket. The bidirectional lead screw is threadedly connected with the two first connecting frames. A positioning mechanism for limiting the connector is arranged on the top surface of the turntable.

[0010] Further, the positioning mechanism includes a positioning block fixedly connected to the surface of the first connecting frame. A slide bar is slidably connected to the inside of the positioning block. A pressing plate is fixedly connected to one end of the slide bar. A third screw is threadedly connected to the inside of the slide bar. A hand wheel is fixedly connected to one end of the third screw. Two linkage rods are symmetrically fixedly connected to the surface of the pressing plate. Positioning channels are respectively formed in the two V-shaped clamping blocks. The linkage rods are slidably connected with the V-shaped clamping blocks through the positioning channels. A first limiting chute is formed in the inside of one of the linkage rods. A third pointer is arranged in the first limiting chute. The third pointer is slidably connected with the linkage rod through the first limiting chute. A second limiting chute is formed in the back surface of the V-shaped clamping block. The third pointer is slidably connected with the V-shaped clamping block through the second limiting chute. A third scale plate is fixedly connected to the back surface of the V-shaped clamping block. A rotating mechanism for rotating the turntable is arranged on the bottom surface of the turntable.

[0011] Further, the rotating mechanism includes a second stepping motor fixedly connected to the bottom surface of the workbench through a bracket. The output shaft of the second stepping motor is fixedly connected with a grooved wheel through a coupling. The grooved wheel is meshed and connected with a Maltese cross wheel. A positioning shaft is fixedly connected to the top surface of the Maltese cross wheel. The positioning shaft penetrates through the surface of the workbench and is fixedly connected with the turntable.

[0012] Further, the double chamfering assembly includes a second connecting frame fixedly connected to the top surface of the workbench by bolts. A slide rail is fixedly connected to the top surface of the second connecting frame by bolts. A third stepping motor is slidably connected to the surface of the slide rail. The output shaft of the third stepping motor is fixedly connected to a second positioning disc through a coupling. A positioning chute is provided on the surface of the second positioning disc. Two mounting blocks are slidably connected inside the positioning chute. A chamfering tool is mounted on the surface of each mounting block by bolts. The cutting edges of the two chamfering tools have the same direction. A bolt is threadedly connected to the surface of the mounting block. An electric push rod is mounted on the bottom surface of the second connecting frame. The output shaft of the electric push rod penetrates through the surface of the second connecting frame and is fixedly connected to the third stepping motor.

[0013] Further, the dust collection assembly includes a vacuum machine installed inside the cabinet. A storage shell is provided at the input end of the vacuum machine. A filter cloth bag is covered inside the storage shell. A cover plate is provided above the storage shell. An exhaust duct is mounted on the top surface of the cover plate. One end of the exhaust duct away from the cover plate penetrates through the surface of the cabinet and faces the V-shaped clamping block.

[0014] Compared with the prior art, the present invention provides a connector inner hole grinding device and its processing technology, having the following beneficial effects: 1. Through the adjustable grinding assembly and positioning assembly of the present invention, it can adapt to connectors with different inner diameters and outer dimensions, realizing multi-purpose use of one machine, significantly reducing the equipment investment cost, and is especially suitable for small batch and multi-variety production scenarios.

[0015] 2. Through the cooperation of the first pointer and the scale of the first scale plate of the present invention, the accurate positioning of the grinding rod is ensured, solving the limitation that traditional equipment can only process a single specification.

[0016] 3. Through the intermittent indexing mechanism of the turntable and the Maltese cross wheel of the present invention, the automatic switching between the grinding and chamfering processes is realized. With the synchronous processing of the inner and outer double knives of the double chamfering assembly, the number of workpiece clamping times is reduced, and the processing efficiency is improved.

[0017] 4. By adopting a flexible exhaust duct with adjustable angle and a detachable filter cloth bag, the present invention effectively collects grinding debris, avoids secondary pollution, keeps the working environment clean at the same time, and prolongs the service life of the equipment.

[0018] 5. Through the third pointer, the third scale plate and the grinding rod fixed by bolts of the present invention, rapid tool change and parameter calibration are realized, reducing the dependence on the experience of operators, ensuring the processing consistency of products in the same batch, and improving the qualified product rate. Description of the Drawings

[0019] Figure 1Schematic three-dimensional structure diagram of a connector inner hole grinding device and its processing technology proposed by the present invention; Figure 2 Schematic structure diagram of the workbench and ball screw sliding table module of a connector inner hole grinding device proposed by the present invention; Figure 3 Schematic structure diagram of the first synchronous pulley and external gear of a connector inner hole grinding device proposed by the present invention; Figure 4 Schematic structure diagram of the limit slider and the second spring of a connector inner hole grinding device proposed by the present invention; Figure 5 Schematic structure diagram of the positioning slider and the limit frame of a connector inner hole grinding device proposed by the present invention; Figure 6 Schematic structure diagram of the turntable and the first connecting frame of a connector inner hole grinding device proposed by the present invention; Figure 7 Schematic structure diagram of the V-shaped clamp block and the bidirectional lead screw of a connector inner hole grinding device proposed by the present invention; Figure 8 Schematic structure diagram of the Figure 7 A part enlarged structure diagram of a connector inner hole grinding device proposed by the present invention; Figure 9 Schematic structure diagram of the second connecting frame and the slide rail of a connector inner hole grinding device proposed by the present invention; Figure 10 Schematic structure diagram of the second connecting frame and the electric push rod of a connector inner hole grinding device proposed by the present invention; Figure 11 Schematic structure diagram of the vacuum machine and the storage shell of a connector inner hole grinding device proposed by the present invention; Figure 12 Schematic structure diagram of the storage shell and the filter cloth bag of a connector inner hole grinding device proposed by the present invention.

[0020] In the figure: 1. Housing main body; 11. Cabinet; 12. Workbench; 2. Grinding assembly; 21. Ball screw slide module; 22. Connecting table; 23. First stepping motor; 24. Connecting shaft; 25. Third connecting frame; 26. Positioning plate; 27. Internal gear; 28. External gear; 29. First synchronous pulley; 210. Second synchronous pulley; 211. Positioning cylinder; 212. Grinding rod; 213. Third synchronous pulley; 214. Positioning frame; 215. Limit slider; 216. Timing belt; 217. First spring; 218. First positioning disc; 219. Slideway; 220. Limit frame; 221. Fixed plate; 222. First screw; 223. Rubber ball; 224. Friction groove; 225. Positioning slider; 226. Second pointer; 227. Second screw; 228. First gear; 229. Second gear; 230. First pointer; 231. First scale plate; 232. Second scale plate; 3. Positioning assembly; 31. Second stepping motor; 32. Maltese cross wheel; 33. Turntable; 34. V-shaped clamp block; 35. First connecting frame; 36. Bidirectional lead screw; 37. Positioning block; 38. Slide bar; 39. Third screw; 310. Handwheel; 311. Pressure plate; 312. Linking rod; 313. Positioning track; 314. First limit chute; 315. Third pointer; 316. Third scale plate; 317. Second limit chute; 4. Double chamfering assembly; 41. Second connecting frame; 42. Third stepping motor; 43. Second positioning disc; 44. Positioning chute; 45. Chamfering tool; 46. Slide rail; 47. Electric push rod; 5. Dust suction assembly; 51. Vacuum machine; 52. Material storage shell; 53. Cover plate; 54. Exhaust duct; 55. Filter cloth bag. Detailed implementation manners

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" as used in the present invention, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is the orientation or positional relationship based on the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0023] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0024] Please refer to Figures 1-12 As shown, a connector inner hole grinding device and its processing technology include a housing main body 1. The housing main body 1 includes a cabinet body 11 and a workbench 12 arranged on the top surface of the cabinet body 11. Above the workbench 12, a grinding assembly 2 for grinding the inner holes of different connectors is provided. At a position on the right side of the grinding assembly 2 above the workbench 12, a positioning assembly 3 for clamping different connectors is provided. At a position in front of the positioning assembly 3 above the workbench 12, a double chamfering assembly 4 for chamfering the inner edge and outer edge of the connector hole simultaneously is provided. Inside the cabinet body 11, a dust suction assembly 5 for sucking out the debris in the connector inner hole is provided.

[0025] To solve the technical problem of grinding connectors with different inner diameters within a certain range, the present invention adopts the following structure. The grinding assembly 2 includes a ball screw slide module 21 installed on the bottom surface of the workbench 12. Above the workbench 12, there is a connecting platform 22. The slide of the ball screw slide module 21 penetrates the surface of the workbench 12 and is fixedly connected to the connecting platform 22. On the top surface of the connecting platform 22, a first stepping motor 23 is installed. The output shaft of the first stepping motor 23 is fixedly connected to a connecting shaft 24 through a coupling. One end of the connecting shaft 24 away from the first stepping motor 23 is fixedly connected to a first positioning disc 218 through bolts. Inside the first positioning disc 218, there is a slideway 219. Inside the slideway 219, there is a limiting frame 220. The limiting frame 220 is slidably connected to the first positioning disc 218 through the slideway 219. Inside the limiting frame 220, there is a positioning cylinder 211. Inside the positioning cylinder 211, a grinding rod 212 is installed through bolts. On the surface of the limiting frame 220, there is a fixed plate 221. Inside the fixed plate 221, there is a first screw rod 222 threadedly connected. One end of the first screw rod 222 facing the first positioning disc 218 is fixedly connected to a rubber ball 223. At a position corresponding to the rubber ball 223 on the first positioning disc 218, there is a friction groove 224. The rubber ball 223 is inserted into the friction groove 224. On the surface of the first positioning disc 218, there is a first scale plate 231. On the surface of the positioning cylinder 211, there is a first pointer 230 rotatably connected. Inside the limiting frame 220, there is a limiting mechanism. The limiting mechanism includes a positioning slider 225 slidably connected inside the limiting frame 220. The positioning cylinder 211 is inserted into the positioning slider 225 and is rotatably connected to it. On the surface of the positioning slider 225, there is a second screw rod 227 rotatably connected. The second screw rod 227 is threadedly connected to the limiting frame 220. One end of the second screw rod 227 away from the positioning slider 225 is fixedly connected to a first gear 228. On the surface of the first gear 228, there is a second gear 229 meshingly connected. The second gear 229 is rotatably connected to the positioning slider 225 through a bracket. On the surface of the positioning slider 225, there is a second pointer 226 fixedly connected. On the surface of the limiting frame 220, there is a second scale plate 232. On the surface of the positioning cylinder 211, there is a linkage mechanism for rotating the positioning cylinder 211. The linkage mechanism includes a second synchronous wheel 210 fixedly connected to the surface of the positioning cylinder 211. On the surface of the second synchronous wheel 210, there is a first synchronous wheel 29 meshingly connected through a synchronous belt 216. The first synchronous wheel 29 is sleeved on the surface of the connecting shaft 24. On the surface of the connecting shaft 24, there is an external gear 28 rotatably connected. The external gear 28 and the first synchronous wheel 29 are fixedly connected. On the surface of the connecting shaft 24, there is a third connecting frame 25 rotatably connected. The third connecting frame 25 is slidably connected to the workbench 12. On the surface of the third connecting frame 25, there is a positioning plate 26. Inside the positioning plate 26, there is an internal gear 27 fixedly connected. The internal gear 27 is meshingly connected with the first synchronous wheel 29. On the surface of the connecting shaft 24, there is a positioning frame 214 fixedly connected. Inside the positioning frame 214, there is a limiting slider 215 slidably connected.A third synchronous pulley 213 is rotatably connected inside the limit slider 215. The third synchronous pulley 213 is meshed with the synchronous belt 216. A first spring 217 is arranged inside the positioning frame 214. Two ends of the first spring 217 are fixedly connected to the positioning frame 214 and the limit slider 215 respectively. When inner hole grinding of the connector is required, first position the connector, then insert the grinding rod 212 into the positioning cylinder 211 and position it with bolts. Then adjust the position of the grinding rod 212 according to the diameter to be ground inside the connector. First, rotate the first screw rod 222. Due to being threadedly connected to the fixed plate 221, the rubber ball 223 will slide out from inside the friction groove 224, thus releasing the limit on the limit frame 220. Then, look straight at the first pointer 230 and adjust the position of the grinding rod 212 through the scale lines on the surface of the first scale plate 231, so that the grinding rod 212 can grind connectors with different inner diameters within a certain range. After the adjustment is completed, reverse the first screw rod 222, and position the limit frame 220 through the friction between the rubber ball 223 and the first positioning disk 218. As the grinding time of the grinding rod 212 extends, the diameter of the grinding rod 212 will become smaller due to wear. To prevent uneven and non-smooth grinding of the hole wall caused by the reduction of the grinding rod 212, rotate the second gear 229, and the first gear 228 will be driven to drive the second screw rod 227 to rotate, so that the positioning slider 225 drives the positioning cylinder 211 to slide inside the limit frame 220. By looking straight at the position of the second pointer 226 on the scale lines of the second scale plate 232, judge the inner diameter of the inner hole of the connector, and adjust in time when the grinding shrinks, so that the grinding rod 212 can closely adhere to the inner hole wall of the connector. When grinding, connect the ball screw slide module 21 to an external power supply and then start it. The ball screw slide module 21 will drive the connecting shaft 24 to move outward of the connector through the connecting table 22. The movement of the connecting shaft 24 will drive the third connecting frame 25, the positioning plate 26 and the first positioning disk 218 to all move towards the connector until the grinding rod 212 enters the inner hole and reaches an appropriate depth. Then connect the first stepping motor 23 to an external power supply and start it. The connecting shaft 24 will rotate inside the third connecting frame 25, and the first positioning disk 218 will be driven to rotate, thereby driving the grinding rod 212 to grind on the inner wall of the inner hole. The external gear 28 will rotate on its own due to the meshing with the internal gear 27 when the connecting shaft 24 rotates, so that the first synchronous pulley 29 drives the second synchronous pulley 210 and the third synchronous pulley 213 to rotate through the synchronous belt 216. The rotation of the second synchronous pulley 210 will drive the grinding rod 212 to rotate through the positioning cylinder 211, so that the grinding rod 212 can rotate while revolving, making the wear more uniform during grinding. The diameters of the first synchronous pulley 29 and the second synchronous pulley 210 differ greatly, and the gear ratio enables the grinding rod 212 to rotate faster, making the grinding more stable and smooth. When the position of the positioning cylinder 211 is debugged, the limit slider 215 will move due to the elastic potential energy of the first spring 217, making the synchronous belt 216 always taut.Grinding of connectors with different inner diameters within a certain range is achieved.

[0026] It should be noted that the ball screw slide module 21 includes a ball screw, a slide table, a linear guide rail, a motor, a coupling, etc., which can be set by those skilled in the art according to actual needs and will not be elaborated here.

[0027] To solve the technical problem of positioning and clamping a connector, the present invention adopts the following. The positioning assembly 3 includes a turntable 33 arranged on the top surface of the workbench 12. The turntable 33 is rotatably connected to the workbench 12. The top surface of the turntable 33 is fixedly connected with a first connecting frame 35 by bolts. Two V-shaped clamping blocks 34 are symmetrically arranged on the top surface of the first connecting frame 35. The bottom surface of the first connecting frame 35 is rotatably connected with a bidirectional lead screw 36 through a bracket. The bidirectional lead screw 36 is threadedly connected with the two first connecting frames 35. The top surface of the turntable 33 is provided with a positioning mechanism for limiting the connector. The positioning mechanism includes a positioning block 37 fixedly connected to the surface of the first connecting frame 35. A slide bar 38 is slidably connected inside the positioning block 37. One end of the slide bar 38 is fixedly connected with a pressing plate 311. A third screw 39 is threadedly connected inside the slide bar 38. One end of the third screw 39 is fixedly connected with a handwheel 310. Two linkage rods 312 are symmetrically and fixedly connected to the surface of the pressing plate 311. Positioning channels 313 are respectively opened inside the two V-shaped clamping blocks 34. The linkage rods 312 are slidably connected with the V-shaped clamping blocks 34 through the positioning channels 313. A first limiting chute 314 is opened inside one of the linkage rods 312. A third pointer 315 is arranged inside the first limiting chute 314. The third pointer 315 is slidably connected with the linkage rod 312 through the first limiting chute 314. A second limiting chute 317 is opened on the back surface of the V-shaped clamping block 34. The third pointer 315 is slidably connected with the V-shaped clamping block 34 through the second limiting chute 317. A third scale plate 316 is fixedly connected to the back surface of the V-shaped clamping block 34. The bottom surface of the turntable 33 is provided with a rotating mechanism for rotating the turntable 33. The rotating mechanism includes a second stepping motor 31 fixedly connected to the bottom surface of the workbench 12 through a bracket. The output shaft of the second stepping motor 31 is fixedly connected with a grooved wheel through a coupling. And the grooved wheel is meshed with a Maltese cross wheel 32. The top surface of the Maltese cross wheel 32 is fixedly connected with a positioning shaft. The positioning shaft penetrates through the surface of the workbench 12 and is fixedly connected with the turntable 33. When it is necessary to position the connector, first place the connector between the two V-shaped clamping blocks 34. Then rotate the handwheel 310. When the third screw 39 rotates, the slide bar 38 will move the pressing plate 311 towards the position of the connector inside the positioning block 37. When the pressing plate 311 moves, it will limit the third pointer 315 through the first limiting chute 314 opened on the linkage rod 312, so that the third pointer 315 slides inside the second limiting chute 317. By observing the scale lines on the surface of the third pointer 315 and the third scale plate 316 directly, the moving distance of the pressing plate 311 can be judged, which can make the placement positions of the same batch of connectors the same when grinding the inner holes, so that the grinding depths can be the same, and there is no need to reposition each time of clamping. Then apply force to the bidirectional lead screw 36 to make it rotate, and the two V-shaped clamping blocks 34 will move towards the center because they are threadedly connected, thus realizing the clamping of the connector. The shape of the V-shaped clamping blocks 34 can clamp connectors with different diameters within a certain range. And placing the two V-shaped clamping blocks 34 horizontally makes the axes of the connectors consistent regardless of their diameters.After the internal hole grinding is completed, connect the second stepping motor 31 to an external power supply and then start it. The second stepping motor 31 will drive the Maltese cross wheel 32 to rotate through the grooved wheel. The Maltese cross wheel 32 will drive the turntable 33 to rotate. The cooperation between the grooved wheel and the Maltese cross wheel 32 enables the turntable 33 to rotate precisely by 90 degrees, facilitating the subsequent chamfering operation.

[0028] It should be noted that a brake device is installed on the surface of the second stepping motor 31 and is electrically connected to the second stepping motor 31, mainly used to quickly stop the rotor movement when the motor is powered off, preventing the load from sliding or accidentally moving.

[0029] To solve the technical problem of double chamfering of the inner and outer sides of the connector, the present invention adopts. The double chamfering assembly 4 includes a second connecting frame 41 fixedly connected to the top surface of the workbench 12 by bolts. A slide rail 46 is fixedly connected to the top surface of the second connecting frame 41 by bolts. A third stepping motor 42 is slidably connected to the surface of the slide rail 46. The output shaft of the third stepping motor 42 is fixedly connected to a second positioning disk 43 through a coupling. A positioning chute 44 is provided on the surface of the second positioning disk 43. Two mounting blocks are slidably connected to the inside of the positioning chute 44. A chamfering tool 45 is installed on the surface of each mounting block by bolts. The cutting edges of the two chamfering tools 45 are in the same direction. A bolt is threadedly connected to the surface of the mounting block. An electric push rod 47 is installed on the bottom surface of the second connecting frame 41. The output shaft of the electric push rod 47 penetrates the surface of the second connecting frame 41 and is fixedly connected to the third stepping motor 42. When chamfering is required, first install the two chamfering tools 45 on the surface of the mounting block, and then rotate the bolt to loosen the limit on the mounting block, so that the mounting block slides inside the limit groove until the adjustment is completed according to the wall thickness of the connector. Then lock the mounting block with bolts, so that the two chamfering tools 45 are respectively located outside and inside the edge of the inner hole of the connector. When internal and external chamfering of the inner hole of the connector is required, connect the electric push rod 47 to an external power supply and then start it. The third stepping motor 42 will be driven to move towards the connector on the surfaces of the two slide rails 46 until it moves to a suitable position. Then start the third stepping motor 42. The third stepping motor 42 will drive the second positioning disk 43 to rotate, and through the rotation of the second positioning disk 43, internal and external chamfering of the surface of the inner hole of the connector is achieved simultaneously.

[0030] To solve the technical problem of debris affecting the grinding smoothness, the present invention adopts the following. The dust suction assembly 5 includes a vacuum machine 51 installed inside the cabinet body 11. The input end of the vacuum machine 51 is provided with a storage shell 52. The inside of the storage shell 52 is covered with a filter cloth bag 55. Above the storage shell 52 is provided with a cover plate 53. The top surface of the cover plate 53 is installed with an exhaust pipe 54. One end of the exhaust pipe 54 away from the cover plate 53 penetrates the surface of the cabinet body 11 and faces the V-shaped clamping block 34. To prevent debris from affecting the grinding smoothness during grinding, during grinding, one end of the exhaust pipe 54 is pulled towards the inner hole of the connector, and then the vacuum machine 51 is connected to an external power supply and started. The vacuum machine 51 will suck air from the inside of the exhaust pipe 54 through the storage shell 52. The debris generated during grinding will be sucked into the inside of the storage shell 52 through the exhaust pipe 54. Due to the blocking of the filter cloth bag 55, the debris is stored inside the filter cloth bag 55. When cleaning is required, the cover plate 53 is lifted, and then the filter cloth bag 55 wrapped with the debris is lifted out from the inside of the storage shell 52, and centralized treatment of the debris can be achieved.

[0031] It should be noted that motors, electric push rods, etc. are prior arts, and those skilled in the art can set them according to actual needs, so no further description will be given here.

[0032] It should be noted that an annular groove is axially provided on the inner wall of the threaded barrel (threaded hole). A nylon 66 damping ring with a Shore hardness of 85A is embedded in the groove. Through the continuous axial pressing force generated by its elastic deformation, an interference fit with a spiral angle of 15° - 20° is formed with the surface of the threaded rod. When the threaded pair bears an axial vibration load, the nylon insert can produce an elastic compression amount of up to 0.3 mm, increasing the friction coefficient between the threaded contact surfaces from 0.15 to 0.68 (tested according to ASTM D1894 standard), effectively suppressing the loosening displacement caused by the rebound of the thread.

[0033] It should be noted that the exhaust pipe 54 is a flexible pipe and is inlaid with iron wire, which has a certain flexibility and can be shaped at the same time.

[0034] A grinding process for the inner hole of a connector includes the following steps: S1: When the connector needs to be positioned, first place the connector between two V-shaped clamping blocks 34, and then rotate the handwheel 310. The rotation of the third screw 39 will cause the slide bar 38 to move the abutting plate 311 towards the connector inside the positioning block 37. When the abutting plate 311 moves, it will limit the third pointer 315 through the first limit chute 314 opened on the linkage rod 312, causing the third pointer 315 to slide inside the second limit chute 317. By observing the scale lines on the surfaces of the third pointer 315 and the third scale plate 316 from the front view, the moving distance of the abutting plate 311 can be judged, so that the placement positions of the connectors in the same batch are the same when grinding the inner hole, and thus the grinding depth can be the same, without repositioning during each clamping. Then apply force to the bidirectional lead screw 36 to make it rotate, and the two V-shaped clamping blocks 34 will move towards the center due to their threaded connection, realizing the clamping of the connector. The shape of the V-shaped clamping blocks 34 can clamp connectors with different diameters within a certain range, and placing the two V-shaped clamping blocks 34 horizontally makes the axes of the connectors consistent regardless of their diameters. When the inner hole grinding is completed, connect the second stepping motor 31 to an external power supply and start it. The second stepping motor 31 will drive the Maltese cross wheel 32 to rotate through the grooved wheel, and the Maltese cross wheel 32 will drive the turntable 33 to rotate. The cooperation between the grooved wheel and the Maltese cross wheel 32 enables the turntable 33 to rotate precisely by 90 degrees, facilitating subsequent chamfering operations; S2: When the inner hole of the connector needs to be ground, first position the connector, then insert the grinding rod 212 into the inside of the positioning cylinder 211 and position it with bolts. Then, adjust the position of the grinding rod 212 according to the diameter to be ground inside the connector. First, rotate the first screw rod 222. Due to the threaded connection with the fixed plate 221, the rubber ball 223 will slide out from the inside of the friction groove 224, thus releasing the limit on the limit frame 220. Then, look directly at the first pointer 230 and adjust the position of the grinding rod 212 through the scale line on the surface of the first scale plate 231, so that the grinding rod 212 can grind connectors with different inner diameters within a certain range. After the adjustment is completed, reverse the first screw rod 222, and the positioning of the limit frame 220 is achieved through the friction between the rubber ball 223 and the first positioning disk 218. As the grinding time of the grinding rod 212 prolongs, the diameter of the grinding rod 212 will become smaller due to wear. To prevent the inner hole wall from being ground unevenly and not smoothly due to the reduction of the grinding rod 212, rotate the second gear 229, and the first gear 228 will be driven to drive the second screw rod 227 to rotate, so that the positioning slider 225 drives the positioning cylinder 211 to slide inside the limit frame 220. By looking directly at the position of the second pointer 226 on the scale line of the second scale plate 232, judge the inner diameter of the inner hole of the connector and adjust it in time when the grinding shrinks, so that the grinding rod 212 can closely adhere to the inner hole wall of the connector. When grinding, connect the ball screw slide table module 21 to an external power supply and then start it. The ball screw slide table module 21 will drive the connecting shaft 24 to move outward of the connector through the connecting table 22. The movement of the connecting shaft 24 will drive the third connecting frame 25, the positioning plate 26 and the first positioning disk 218 to all move towards the connector until the grinding rod 212 enters the inner hole and reaches an appropriate depth. Then, connect the first stepping motor 23 to an external power supply and start it. The connecting shaft 24 will rotate inside the third connecting frame 25, and the first positioning disk 218 will be driven to rotate, thus driving the grinding rod 212 to grind on the inner wall of the inner hole. The outer gear 28 will rotate selflessly due to the meshing with the inner gear 27 when the connecting shaft 24 rotates, so that the first synchronous pulley 29 drives the second synchronous pulley 210 and the third synchronous pulley 213 to rotate through the synchronous belt 216. The rotation of the second synchronous pulley 210 will drive the grinding rod 212 to rotate through the positioning cylinder 211, so that the grinding rod 212 can rotate while revolving, making the wear during grinding more uniform. The diameters of the first synchronous pulley 29 and the second synchronous pulley 210 differ greatly, and the grinding rod 212 can rotate faster through the gear ratio, making the grinding more stable and smooth. When the position of the positioning cylinder 211 is debugged, the limit slider 215 will move due to the elastic potential energy of the first spring 217, making the synchronous belt 216 always taut, thus realizing the grinding of connectors with different inner diameters within a certain range; S3: When chamfering is required, first install two chamfering tools 45 on the surface of the mounting block, then rotate the bolts to release the limit on the mounting block, so that the mounting block slides inside the limit groove. Until the adjustment according to the wall thickness of the connector is completed, then lock the mounting block through the bolts, so that the two chamfering tools 45 are respectively located outside and inside the edge of the inner hole of the connector. When internal and external chamfering of the inner hole of the connector is required, connect the electric push rod 47 to an external power supply and then start it. The third stepping motor 42 will be driven to move towards the connector on the surfaces of the two slide rails 46 until it moves to a suitable position. Then start the third stepping motor 42, and the third stepping motor 42 will drive the second positioning disc 43 to rotate. By rotating the second positioning disc 43, internal and external chamfering of the surface of the inner hole of the connector can be achieved simultaneously; S4: In order to prevent debris from affecting the smoothness of grinding during grinding, when grinding, pull one end of the air extraction pipe 54 towards the inner hole of the connector, then connect the vacuum machine 51 to an external power supply and start it. The vacuum machine 51 will suck air from the inside of the air extraction pipe 54 through the storage shell 52. The debris generated by grinding will be sucked into the inside of the storage shell 52 through the air extraction pipe 54. Due to the blockage of the filter cloth bag 55, the debris is stored inside the filter cloth bag 55. When cleaning is required, lift the cover plate 53, and then lift the filter cloth bag 55 wrapped with debris out of the inside of the storage shell 52, and centralized treatment of the debris can be achieved.

[0035] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An inner hole grinding device for a connector, comprising a housing main body (1), the housing main body (1) including a cabinet body (11) and a workbench (12) provided on the top surface of the cabinet body (11), characterized in that, Above the workbench (12), there is a grinding component (2) for grinding the inner holes of different connectors. Above the workbench (12), at a position to the right of the grinding component (2), there is a positioning component (3) for clamping different connectors. Above the workbench (12), at a position in front of the positioning component (3), there is a double chamfering component (4) for chamfering the inner and outer edges of the connector holes simultaneously. Inside the cabinet body (11), there is a dust suction component (5) for sucking out the debris in the inner holes of the connectors.

2. The inner hole grinding device of a connector according to claim 1, characterized in that, The grinding component (2) includes a ball screw slide module (21) installed on the bottom surface of the workbench (12). Above the workbench (12), there is a connecting platform (22). The slide of the ball screw slide module (21) penetrates the surface of the workbench (12) and is fixedly connected to the connecting platform (22). On the top surface of the connecting platform (22), there is a first stepping motor (23). The output shaft of the first stepping motor (23) is fixedly connected to a connecting shaft (24) through a coupling. One end of the connecting shaft (24) away from the first stepping motor (23) is fixedly connected to a first positioning disc (218) by bolts. Inside the first positioning disc (218), there is a slideway (219). Inside the slideway (219), there is a limiting frame (220). The limiting frame (220) is slidably connected to the first positioning disc (218) through the slideway (219). Inside the limiting frame (220), there is a positioning cylinder (211). Inside the positioning cylinder (211), a grinding rod (212) is installed by bolts. On the surface of the limiting frame (220), there is a fixed plate (221). Inside the fixed plate (221), there is a first screw rod (222) threadedly connected. One end of the first screw rod (222) facing the first positioning disc (218) is fixedly connected to a rubber ball (223). At a position corresponding to the rubber ball (223) on the first positioning disc (218), there is a friction groove (224). The rubber ball (223) is inserted into the friction groove (224). On the surface of the first positioning disc (218), there is a first scale plate (231). On the surface of the positioning cylinder (211), there is a first pointer (230) rotatably connected. Inside the limiting frame (220), there is a limiting mechanism.

3. The inner hole grinding device of a connector according to claim 2, wherein The limiting mechanism includes a positioning slider (225) slidably connected inside the limiting frame (220). The positioning cylinder (211) is inserted into the positioning slider (225) and rotatably connected thereto. A second screw rod (227) is rotatably connected to the surface of the positioning slider (225). The second screw rod (227) is threadedly connected to the limiting frame (220). One end of the second screw rod (227) away from the positioning slider (225) is fixedly connected to a first gear (228). A second gear (229) is meshed with the surface of the first gear (228). The second gear (229) is rotatably connected to the positioning slider (225) through a bracket. A second pointer (226) is fixedly connected to the surface of the positioning slider (225). A second scale plate (232) is fixedly connected to the surface of the limiting frame (220). A linkage mechanism for rotating the positioning cylinder (211) is provided on the surface of the positioning cylinder (211).

4. A connector inner hole grinding device according to claim 3, characterized in that, The linkage mechanism includes a second synchronous pulley (210) fixedly connected to the surface of the positioning cylinder (211). A first synchronous pulley (29) is meshed with the surface of the second synchronous pulley (210) through a synchronous belt (216). The first synchronous pulley (29) is sleeved on the surface of the connecting shaft (24). An external gear (28) is rotatably connected to the surface of the connecting shaft (24). The external gear (28) and the first synchronous pulley (29) are fixedly connected. A third connecting bracket (25) is rotatably connected to the surface of the connecting shaft (24). The third connecting bracket (25) is slidably connected to the workbench (12). A positioning plate (26) is fixedly connected to the surface of the third connecting bracket (25). An internal gear (27) is fixedly connected to the inside of the positioning plate (26). The internal gear (27) is meshed with the first synchronous pulley (29). A positioning frame (214) is fixedly connected to the surface of the connecting shaft (24). A limiting slider (215) is slidably connected to the inside of the positioning frame (214). A third synchronous pulley (213) is rotatably connected to the inside of the limiting slider (215). The third synchronous pulley (213) is meshed with the synchronous belt (216). A first spring (217) is provided inside the positioning frame (214). Two ends of the first spring (217) are respectively fixedly connected to the positioning frame (214) and the limiting slider (215).

5. A connector inner hole grinding device according to claim 1, characterized in that, The positioning assembly (3) includes a turntable (33) arranged on the top surface of the workbench (12). The turntable (33) is rotatably connected to the workbench (12). A first connecting bracket (35) is fixedly connected to the top surface of the turntable (33) by bolts. Two V-shaped clamping blocks (34) are symmetrically arranged on the top surface of the first connecting bracket (35). A bidirectional screw rod (36) is rotatably connected to the bottom surface of the first connecting bracket (35) through a bracket. The bidirectional screw rod (36) is threadedly connected to the two first connecting brackets (35). A positioning mechanism for limiting the connector is provided on the top surface of the turntable (33).

6. The inner hole grinding device for a connector according to claim 5, characterized in that, The positioning mechanism includes a positioning block (37) fixedly connected to the surface of the first connecting frame (35). A slide bar (38) is slidably connected inside the positioning block (37). One end of the slide bar (38) is fixedly connected to a pressing plate (311). A third screw rod (39) is threadedly connected inside the slide bar (38). One end of the third screw rod (39) is fixedly connected to a hand wheel (310). Two linkage rods (312) are symmetrically and fixedly connected to the surface of the pressing plate (311). Positioning channels (313) are formed inside both of the V-shaped clamping blocks (34). The linkage rods (312) are slidably connected to the V-shaped clamping blocks (34) through the positioning channels (313). A first limit sliding groove (314) is formed inside one of the linkage rods (312). A third pointer (315) is arranged inside the first limit sliding groove (314). The third pointer (315) is slidably connected to the linkage rod (312) through the first limit sliding groove (314). A second limit sliding groove (317) is formed on the back surface of the V-shaped clamping block (34). The third pointer (315) is slidably connected to the V-shaped clamping block (34) through the second limit sliding groove (317). A third scale plate (316) is fixedly connected to the back surface of the V-shaped clamping block (34). A rotating mechanism for rotating the turntable (33) is arranged on the bottom surface of the turntable (33).

7. A connector inner hole grinding device according to claim 6, characterized in that, The rotating mechanism includes a second stepping motor (31) fixedly connected to the bottom surface of the workbench (12) through a bracket. The output shaft of the second stepping motor (31) is fixedly connected to a grooved wheel through a coupling. And the grooved wheel is meshed with a Maltese cross wheel (32). A positioning shaft is fixedly connected to the top surface of the Maltese cross wheel (32). The positioning shaft penetrates through the surface of the workbench (12) and is fixedly connected to the turntable (33).

8. A connector inner hole grinding device according to claim 1, characterized in that, The double chamfering assembly (4) includes a second connecting frame (41) fixedly connected to the top surface of the workbench (12) through bolts. A slide rail (46) is fixedly connected to the top surface of the second connecting frame (41) through bolts. A third stepping motor (42) is slidably connected to the surface of the slide rail (46). The output shaft of the third stepping motor (42) is fixedly connected to a second positioning disc (43) through a coupling. A positioning sliding groove (44) is formed on the surface of the second positioning disc (43). Two mounting blocks are slidably connected inside the positioning sliding groove (44). A chamfering cutter (45) is mounted on the surface of each mounting block through bolts. The cutting edges of the two chamfering cutters (45) have the same direction. A bolt is threadedly connected to the surface of the mounting block. An electric push rod (47) is mounted on the bottom surface of the second connecting frame (41). The output shaft of the electric push rod (47) penetrates through the surface of the second connecting frame (41) and is fixedly connected to the third stepping motor (42).

9. A connector inner hole grinding device according to claim 1, characterized in that, The dust suction assembly (5) includes a vacuum machine (51) installed inside the cabinet (11). The input end of the vacuum machine (51) is provided with a material storage shell (52). The inside of the material storage shell (52) is covered with a filter cloth bag (55). Above the material storage shell (52), there is a cover plate (53). The top surface of the cover plate (53) is installed with an air extraction pipe (54). One end of the air extraction pipe (54) away from the cover plate (53) penetrates the surface of the cabinet (11) and faces the V-shaped clamp block (34).

10. A grinding process for the inner hole of a connector is applicable to a grinding device for the inner hole of a connector as described in any one of claims 4-9, characterized in that, It includes the following steps: S1: When it is necessary to position the connector, first place the connector between the two V-shaped clamp blocks (34), and then rotate the handwheel (310). The rotation of the third screw rod (39) will cause the slide rod (38) to drive the pressing plate (311) to move towards the position of the connector inside the positioning block (37). When the pressing plate (311) moves, it will limit the third pointer (315) through the first limit chute (314) opened in the linkage rod (312), so that the third pointer (315) slides inside the second limit chute (317). By observing the scale lines on the surfaces of the third pointer (315) and the third scale plate (316) from the front view, the moving distance of the pressing plate (311) can be judged, so that the placement positions of the same batch of connectors during internal hole grinding are the same, and thus the grinding depth can be the same. There is no need to reposition during each clamping. Then apply force to the bidirectional lead screw (36) to make it rotate, and the two V-shaped clamp blocks (34) will move towards the center due to their threaded connection, thus realizing the clamping of the connector. The shape of the V-shaped clamp block (34) can clamp connectors with different diameters within a certain range. The two horizontally placed V-shaped clamp blocks (34) ensure that regardless of the diameter of the connector, their axes are consistent. When the internal hole grinding is completed, connect the second stepping motor (31) to an external power supply and then start it. The second stepping motor (31) will drive the Maltese cross wheel (32) to rotate through the grooved pulley. The Maltese cross wheel (32) will drive the turntable (33) to rotate. The cooperation between the grooved pulley and the Maltese cross wheel (32) enables the turntable (33) to accurately rotate by 90 degrees, facilitating subsequent chamfering operations; S2: When internal hole grinding of the connector is required, first position the connector, then insert the grinding rod (212) into the inside of the positioning cylinder (211), and position it with bolts. Then adjust the position of the grinding rod (212) according to the diameter to be ground inside the connector. First, rotate the first screw rod (222). Due to the threaded connection with the fixed plate (221), the rubber ball (223) will slide out from the inside of the friction groove (224), thus releasing the limit on the limit frame (220). Then, face the first pointer (230) and adjust the position of the grinding rod (212) through the scale line on the surface of the first scale plate (231), so that the grinding rod (212) can grind connectors with different inner diameters within a certain range. After the adjustment is completed, reverse the first screw rod (222), and the positioning of the limit frame (220) is achieved through the friction between the rubber ball (223) and the first positioning disk (218). As the grinding time of the grinding rod (212) extends, the diameter of the grinding rod (212) will become smaller due to wear. To prevent the inner hole wall from being ground unevenly and smoothly due to the shrinkage of the grinding rod (212), rotate the second gear (229), and the first gear (228) will drive the second screw rod (227) to rotate, so that the positioning slider (225) drives the positioning cylinder (211) to slide inside the limit frame (220). By observing the position of the second pointer (226) on the scale line of the second scale plate (232) directly, judge the inner diameter of the inner hole of the connector, and adjust it in time when the grinding shrinks, so that the grinding rod (212) can closely adhere to the inner hole wall of the connector. When grinding, connect the ball screw slide module (21) to an external power supply and then start it. The ball screw slide module (21) will drive the connecting shaft (24) to move outward of the connector through the connecting table (22). The movement of the connecting shaft (24) will drive the third connecting frame (25), the positioning plate (26), and the first positioning disk (218) to move in the direction of the connector until the grinding rod (212) enters the inner hole and reaches an appropriate depth. Then, connect the first stepping motor (23) to an external power supply and start it. The connecting shaft (24) will rotate inside the third connecting frame (25), and the first positioning disk (218) will be driven to rotate, thereby driving the grinding rod (212) to grind on the inner wall of the inner hole. The external gear (28) will rotate on its own due to the meshing with the internal gear (27) during the rotation of the connecting shaft (24), so that the first synchronous pulley (29) drives the second synchronous pulley (210) and the third synchronous pulley (213) to rotate through the synchronous belt (216). The rotation of the second synchronous pulley (210) will drive the grinding rod (212) to rotate through the positioning cylinder (211), so that the grinding rod (212) can rotate while revolving, making the wear during grinding more uniform. The diameters of the first synchronous pulley (29) and the second synchronous pulley (210) differ greatly, and through the gear ratio, the grinding rod (212) can rotate faster, making the grinding more stable and smooth. When the position of the positioning cylinder (211) is debugged,The limiting slider (215) moves due to the elastic potential energy of the first spring (217), making the synchronous belt (216) always taut, thus achieving grinding of connectors with different inner diameters within a certain range. S3: When chamfering is required, first install the two chamfering cutters (45) on the surface of the mounting block, and then rotate the bolt to release the limit on the mounting block, so that the mounting block slides inside the limit groove. Until the adjustment is completed according to the wall thickness of the connector, then lock the mounting block through the bolt, so that the two chamfering cutters (45) are respectively located outside and inside the edge of the inner hole of the connector. When it is necessary to chamfer the inner hole of the connector both inside and outside, connect the electric push rod (47) to an external power supply and then start it. The third stepping motor (42) will be driven to move towards the connector direction on the surfaces of the two slide rails (46) until it moves to a suitable position. Then start the third stepping motor (42), and the third stepping motor (42) will drive the second positioning disk (43) to rotate. By rotating the second positioning disk (43), the inner and outer chamfers of the inner hole surface of the connector are simultaneously performed; S4: To prevent debris from affecting the smoothness of grinding during grinding, one end of the exhaust duct (54) is pulled towards the inner hole of the connector during grinding, and then the vacuum machine (51) is connected to an external power supply and started. The vacuum machine (51) will suck air from the inside of the exhaust duct (54) through the storage shell (52). The debris generated during grinding will be sucked into the inside of the storage shell (52) through the exhaust duct (54). Due to the blocking of the filter cloth bag (55), the debris is stored inside the filter cloth bag (55). When cleaning is required, the cover plate (53) is lifted, and then the filter cloth bag (55) wrapped with the debris is lifted out from the inside of the storage shell (52), and centralized treatment of the debris can be achieved.

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