Chamfering and grinding device for automobile parts

Abstract

The invention relates to the technical field of grinding devices, in particular to a chamfering and grinding device for automobile parts. Comprising a rack, a carrying frame is installed on the rack in a liftable mode, the impact frame is slidably connected to the carrying frame, three first springs are installed between the impact frame and the carrying frame, a reciprocating shaft, a one-way shaft and a grinding shaft frame are rotationally connected to the impact frame, and the reciprocating shaft, the one-way shaft and the grinding shaft frame are in transmission connection through a first synchronous belt. An outer rotating shaft is coaxially and rotationally installed in the grinding shaft frame, two symmetrically-arranged grinding units are installed at the bottom of the grinding shaft frame, and each grinding unit comprises an angle fixing frame and a wheel shaft. The grinding device has the beneficial effects that the power switching unit and the angle adjusting unit are integrated, so that the problem that a traditional grinding device can only rotate in one direction and lacks a grinding mode switching mechanism is solved, and free switching of a rough grinding mode and a fine grinding mode on the same equipment is achieved.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, specifically to a chamfering grinding device for automotive parts. Background Technology

[0002] Grinding equipment, as an important piece of equipment in the field of machining, is widely used in the surface treatment and chamfering of workpieces such as tubular parts and automotive parts. With the increasing demands for processing precision, efficiency, and automation in the manufacturing industry, the structural design and control methods of grinding equipment are constantly evolving. In the existing technology, patent document CN107214574B discloses an automatic grinding device for the arc surface of tubular parts. It uses a three-jaw chuck to fix the workpiece, a hydraulic cylinder to push a support to slide horizontally, and a motor-driven gear system to drive the grinding wheels to rotate and revolve, thus achieving automatic grinding of the outer arc surface of the metal tube. This device can control two grinding wheels to simultaneously perform automatic and rapid grinding of the outer arc surface of the metal tube, improving grinding efficiency. However, its structural design has the following technical problems: First, the driving method is singular, only enabling unidirectional rotation of the grinding wheel, lacking a grinding mode switching mechanism, and unable to adapt to the different requirements of grinding efficiency and precision at different stages of rough grinding and fine grinding; second, the position of the grinding wheel is fixed and cannot be adjusted according to changes in the chamfer angle of the workpiece, resulting in limited processing capabilities for parts of different specifications and with different chamfer angles. Based on this, the present invention provides a chamfering grinding device for automotive parts to solve the problems mentioned in the background art. Summary of the Invention

[0003] This invention addresses the technical problems existing in the prior art by providing an automotive parts chamfering grinding device. This solves the problems of traditional devices being able to perform rotary grinding in only one direction, lacking a mechanism for switching grinding modes, making it difficult to adapt to the different requirements of grinding efficiency and accuracy at different processing stages, and having a fixed position of the grinding wheel that cannot be adjusted according to changes in the chamfer angle of the workpiece, thus limiting its ability to process parts of different specifications and with different chamfer angles.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A chamfering grinding device for automotive parts, comprising a frame on which a carrier is mounted in a height-adjustable manner, and further comprising: The impact frame is slidably connected to the carrier frame, and three first springs are installed between the two. A reciprocating shaft, a one-way shaft and a grinding shaft frame are rotatably connected on the impact frame. The reciprocating shaft, one-way shaft and grinding shaft frame are connected by a first synchronous belt drive. An external rotating shaft is coaxially rotatably installed inside the grinding shaft frame and two symmetrically arranged grinding units are installed at its bottom. The grinding unit includes a fixed angle frame and a wheel axle. Two symmetrically arranged hinged bushings are installed on the fixed angle frame. Both hinged bushings are hinged to the grinding shaft frame. The wheel axle is rotatably connected to the hinged bushings and is drivenly connected to an external rotating shaft. Two second eccentric wheels are installed on the wheel axle. A grinding bar is slidably connected to the fixed angle frame, and a second spring is installed between the two. Two driven rollers are rotatably connected to the grinding bar, and the two driven rollers abut against the two second eccentric wheels respectively. The angle adjustment unit is configured to synchronously change the included angle between the two fixed-angle frames and the impact frame; The power switching unit is configured as follows: Switch between unidirectional and reciprocating rotation of the grinding spindle; When the grinding spindle rotates in one direction, it drives the external rotating shaft and the grinding spindle to rotate synchronously. The grinding shaft head reciprocates and rotates, driving the impact frame to vibrate up and down, and driving the external rotating shaft and the grinding shaft head to rotate asynchronously.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] Preferably, a vertically arranged ball screw lifting mechanism is installed on the frame, the ball screw lifting mechanism is connected to the carrier frame in a transmission manner, the carrier frame is slidably connected to the frame, and a microcontroller is fixedly installed on the upper part of the frame.

[0007] Preferably, a differential shaft is rotatably connected to the bottom of the grinding shaft bracket, and a first bevel gear is installed on both the external rotating shaft and the differential shaft. The two first bevel gears mesh orthogonally, and a second synchronous belt is driven to the differential shaft. Both of the wheel shafts are driven to the second synchronous belt.

[0008] Preferably, the angle adjustment unit includes a lifting sleeve sleeved on the grinding shaft frame, an angle adjustment push rod fixed on the impact frame, and an angle adjustment push frame rotatably sleeved on the lifting sleeve. The bottom end of the angle adjustment push rod is fixedly connected to the angle adjustment push frame, and the lifting sleeve is hinged to the two fixed angle frames.

[0009] Preferably, the power switching unit includes a power slide slidably connected to the carrier frame. A switching push rod is installed between the power slide and the carrier frame. A dual-head motor is fixedly mounted on the power slide and rotatably connected to a clutch shaft and a first eccentric wheel. A transmission guide wheel is installed on one output shaft end of the dual-head motor, and a second bevel gear is installed on both the output shaft end and the clutch shaft. The two second bevel gears mesh orthogonally. A follower roller is rotatably mounted on the impact frame, and the first eccentric wheel abuts against the follower roller. A power bevel gear is installed on the clutch shaft. A third bevel gear is installed on the other output shaft end of the dual-head motor and on the first eccentric wheel. The two third bevel gears mesh orthogonally. The carrier frame is rotatably connected to a drive shaft, a one-way prism shaft, a reciprocating prism shaft, an inner core shaft, and two driven shafts. Driven guide pulleys are mounted on both the drive shaft and the one-way prism shaft. A third synchronous belt is driven to the drive shaft, and both driven shafts are driven to the third synchronous belt. The one-way prism shaft is driven to the one-way shaft, and the reciprocating prism shaft is driven to the reciprocating shaft. A driven bevel gear, adapted to mesh with the power bevel gear, is mounted at the top of the inner core shaft. The inner core shaft is driven to the outer rotating shaft. Incomplete gears are mounted on both driven shafts, and a reciprocating gear is mounted on the reciprocating prism shaft. The two incomplete gears alternately mesh with the reciprocating gear.

[0010] Preferably, the axis of the switching push rod is perpendicular to the axis of the drive shaft and parallel to the axes of the first eccentric wheel, the follower roller, and the clutch shaft, and the width of the first eccentric wheel is 1.1 times the length of the follower roller.

[0011] Preferably, the two driven guide wheels are respectively disposed on the left and right sides of the transmission guide wheel. Both the transmission guide wheel and the driven guide wheel are provided with knurled transmission patterns. The two incomplete gears are respectively disposed on both sides of the reciprocating gear. The central angle corresponding to the effective meshing tooth segment on the incomplete gear is 120°, and the installation phase difference between the effective meshing tooth segments on the two incomplete gears is 180°.

[0012] Preferably, the unidirectional shaft has a first connecting groove with an open bottom end and slidably connected to the unidirectional shaft, the reciprocating shaft has a second connecting groove with an open bottom end and slidably connected to the reciprocating shaft, and the top of the external rotating shaft has a third connecting groove slidably connected to the inner core shaft. The cross-sections of the unidirectional shaft, the reciprocating shaft, the inner core shaft, the first connecting groove, the second connecting groove, and the third connecting groove are all regular hexagons.

[0013] Preferably, the machine also includes a coolant reservoir fixed on the frame, a pump body is installed on the inner top of the coolant reservoir, a metal corrugated nozzle is installed at the outlet port of the pump body, a sludge collection tank with an open top is installed at the lower part of the frame, a processing platform is installed on the sludge collection tank, and an electric clamp is installed on the frame and adjacent to the processing platform.

[0014] Preferably, the electric clamp includes a bidirectional lead screw rotatably connected to the frame and a clamping motor fixedly mounted on the frame. The output shaft end of the clamping motor is fixedly connected to the bidirectional lead screw. The bidirectional lead screw is symmetrically provided with a left-hand threaded section and a right-hand threaded section. Each of the left-hand threaded section and the right-hand threaded section is connected to a clamp. Both clamps are slidably connected to the frame.

[0015] The beneficial effects of this invention are: The beneficial effects of this invention are: This invention solves the problem of traditional grinding devices being only capable of unidirectional rotation and lacking a grinding mode switching mechanism by integrating a power switching unit and an angle adjustment unit. It enables free switching between rough grinding and fine grinding modes on the same equipment. In the rough grinding stage, the power switching unit drives the grinding shaft to reciprocate and rotates, and the first eccentric wheel abuts against the follower roller, causing the impact frame to generate up-and-down impact motion. Combined with the reciprocating sliding of the grinding strip, this forms a compound grinding action, significantly improving material removal efficiency. In the fine grinding stage, the system switches to unidirectional rotation mode, the impact frame stops impacting, and the outer rotating shaft rotates synchronously with the grinding shaft to ensure a uniform and stable grinding trajectory, thereby achieving high-precision machining. This structural design, which enables the switching of multiple motion modes through a single power source, not only simplifies the equipment structure but also allows for seamless connection between roughing and fine grinding processes, greatly improving processing efficiency and quality.

[0016] This invention solves the problem of fixed grinding angles in traditional devices, which cannot adapt to chamfering of parts of different specifications, by setting up symmetrically arranged grinding units and angle adjustment units. The angle adjustment push rod drives the lifting sleeve, which drives the two fixed angle frames to rotate around the hinge point through the connecting rod, thereby precisely adjusting the angle between the grinding bar and the impact frame, and realizing rapid adaptation to different chamfering angles. During this process, the two grinding units always maintain the same angle, ensuring the symmetry and consistency of the processing, and avoiding the errors and efficiency losses caused by manual adjustment or replacement of grinding heads. At the same time, the transmission design of the differential shaft and the second synchronous belt ensures the synchronous rotation of the two wheel shafts, so that the movement of the grinding bar is completely coordinated, further enhancing the stability and accuracy of symmetrical processing, and demonstrating the systematic innovation of multi-mechanism linkage.

[0017] 3) The invention achieves automatic adaptation and coordinated operation of various motion mechanisms during processing mode switching through the linkage control of the power switching unit with multiple components such as the impact frame, grinding shaft frame, and external rotating shaft. When switching to rough grinding mode, the transmission guide wheel abuts against the drive shaft, and the incomplete gear alternately drives the reciprocating gear, causing the grinding shaft frame to rotate back and forth. At the same time, the first eccentric wheel abuts against the follower roller, and the impact frame begins impact motion. The power bevel gear meshes with the passive bevel gear, causing the external rotating shaft and the grinding shaft frame to rotate asynchronously. In fine grinding mode, the transmission guide wheel switches to abut against the unidirectional prism shaft, the impact frame stops impacting, and the external rotating shaft and the grinding shaft frame rotate synchronously. The entire switching process does not require manual intervention. The mechanical structure automatically completes the redistribution of power flow and motion mode, which not only ensures the convenience of operation but also improves the continuity and reliability of processing. This highly integrated linkage and coordination mechanism makes the invention significantly superior to the prior art in terms of structural compactness, functional diversity, and degree of automation, possessing outstanding substantive features and inventiveness. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an automotive parts chamfering grinding device according to the present invention; Figure 2 This is a schematic diagram of the structure of the carrier and impact frame of the present invention; Figure 3 This is a schematic diagram of the incomplete gear and driven shaft of the present invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of the partial structure at point A in the middle; Figure 5 This is a schematic diagram of the structure of the inner mandrel and driven shaft of the present invention; Figure 6 This is a schematic diagram of the clutch shaft structure of the present invention; Figure 7 This is a schematic diagram of the impact frame of the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the cross-sectional structure; Figure 9 This is a schematic diagram of the structure of the wheel axle and the second eccentric wheel of the present invention; Figure 10 This is a structural diagram of the lifting sleeve and differential shaft.

[0019] The attached diagram lists the components represented by each number as follows: 1. Frame; 2. Carrier; 3. Impact frame; 4. Fixed angle frame; 5. Lifting sleeve; 6. Power slide; 7. Coolant reservoir; 8. Electric clamp; 101. Ball screw lifting mechanism; 102. Microcontroller; 103. Sludge collection tank; 104. Machining platform; 201. Reciprocating gear; 202. Drive shaft; 203. One-way prism shaft; 204. Reciprocating prism shaft; 205. Inner spindle; 206. Driven shaft; 207. Driven guide wheel; 208. Incomplete gear; 301. First spring; 30 2. Differential shaft; 303. Reciprocating shaft; 304. One-way shaft; 305. Follower roller; 306. Grinding shaft frame; 307. External rotating shaft; 401. Wheel axle; 402. Second eccentric wheel; 403. Grinding bar; 404. Second spring; 405. Driven roller; 501. Angle adjustment push rod; 502. Angle adjustment push frame; 503. Connecting rod; 601. Switching push rod; 602. Dual-head motor; 603. Clutch shaft; 604. Transmission guide wheel; 605. First eccentric wheel; 701. Metal corrugated nozzle. Detailed Implementation

[0020] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0021] The present invention provides the following preferred embodiments. like Figure 1-10 As shown, an automotive parts chamfering grinding device includes a frame 1 on which a carrier 2 is mounted in a height-adjustable manner. A vertically arranged ball screw lifting mechanism 101 is mounted on the frame 1. The ball screw lifting mechanism 101 is connected to the carrier 2 in a transmission manner. The carrier 2 is slidably connected to the frame 1. A single-chip microcomputer 102 is fixedly mounted on the upper part of the frame 1. It also includes a coolant reservoir 7 fixed on the carrier 2, a pump body is installed on the inner top of the coolant reservoir 7, a metal corrugated nozzle 701 is installed at the outlet port of the pump body, a sludge collection tank 103 with an open top is installed at the lower part of the frame 1, a processing platform 104 is installed on the sludge collection tank 103, and an electric clamp 8 is installed on the frame 1 and adjacent to the processing platform 104.

[0022] During operation, the automotive parts to be processed are placed on the processing tray 104 and clamped by the electric clamp 8; In a preferred embodiment, the automotive part to be processed is a solid bar blank, a hollow tube blank, or a cylindrical blank. The electric clamp 8 includes a bidirectional lead screw rotatably connected to the frame 1 and a clamping motor fixedly mounted on the frame 1. The output shaft end of the clamping motor is fixedly connected to the bidirectional lead screw. The bidirectional lead screw is symmetrically provided with a left-hand threaded section and a right-hand threaded section. Both the left-hand threaded section and the right-hand threaded section are connected to clamps. Both clamps are slidably connected to the frame 1. By driving the bidirectional lead screw to rotate through the clamping motor, and utilizing the transmission characteristics of the left-hand and right-hand threaded sections on the bidirectional lead screw, two clamps can be driven to slide synchronously towards or away from each other along the frame 1, so as to achieve fast and symmetrical clamping and fixing of automotive parts of different sizes and specifications. The force is uniform during the clamping process, which can effectively avoid the clamping deviation of the parts and ensure the machining accuracy of subsequent chamfering grinding. Meanwhile, the electric drive method replaces manual clamping, improving clamping efficiency and stability, adapting to automated processing procedures, and matching the overall automated control of the device. Also includes: Impact frame 3 is slidably connected to carrier frame 2, and three first springs 301 are installed between the two. Reciprocating shaft 303, one-way shaft 304 and grinding shaft frame 306 are rotatably connected to impact frame 3. Reciprocating shaft 303, one-way shaft 304 and grinding shaft frame 306 are connected by a first synchronous belt drive. The reciprocating shaft 303, the one-way shaft 304, and the grinding shaft holder 306 are all equipped with first pulleys that are connected to the first synchronous belt; An external rotating shaft 307 is coaxially rotatably mounted inside the grinding shaft holder 306, and two symmetrically arranged grinding units are mounted on its bottom. A wear-resistant damping washer is embedded between the rotating mating surfaces of the outer rotating shaft 307 and the grinding shaft holder 306. The damping washer provides a preset static friction force so that the outer rotating shaft 307 rotates synchronously with the grinding shaft holder 306 when there is no external power. The grinding unit includes a fixed angle bracket 4 and a wheel axle 401. Two symmetrically arranged hinged bushings are installed on the fixed angle bracket 4. Both hinged bushings are hinged to the grinding shaft bracket 306. The wheel axle 401 is rotatably connected to the hinged bushings. The axes of the wheel axle 401 and the hinged bushings are on the same straight line. The wheel axle 401 is connected to the external rotating shaft 307 in a transmission connection; In a preferred embodiment, a differential shaft 302 is rotatably connected to the bottom of the grinding shaft bracket 306. A first bevel gear is installed on both the external rotating shaft 307 and the differential shaft 302. The two first bevel gears mesh orthogonally. A second synchronous belt is driven to the differential shaft 302. Both wheel shafts 401 are driven to the second synchronous belt. Two second eccentric wheels 402 are mounted on the axle 401. A grinding bar 403 is slidably connected to the fixed angle bracket 4, and a second spring 404 is installed between the two. Two driven rollers 405 are rotatably connected to the grinding bar 403, and the two driven rollers 405 abut against the two second eccentric wheels 402 respectively. When the outer rotating shaft 307 rotates, it can drive the wheel shaft 401 to rotate through the orthogonal meshing of the first bevel gear. The wheel shaft 401 drives the second eccentric wheel 402 to rotate. The second eccentric wheel 402 abuts against the driven roller 405. Combined with the elastic restoring effect of the second spring 404, it can drive the grinding bar 403 to reciprocate linearly sliding on the fixed angle frame 4, so that the grinding end of the grinding bar 403 generates continuous grinding friction with the chamfered surface of the automotive parts, realizing automatic chamfering. Meanwhile, through the transmission of the differential shaft 302 and the second synchronous belt, the two wheel shafts 401 can be rotated synchronously, thereby allowing the grinding bars 403 of the two grinding units to move synchronously, realizing symmetrical chamfering grinding of the parts and ensuring the consistency of the chamfering process. An angle adjustment unit is configured to synchronously change the included angle between the two fixed angle frames 4 and the impact frame 3; The angle adjustment unit includes a lifting sleeve 5 sleeved on the grinding shaft frame 306, an angle adjustment push rod 501 fixed on the impact frame 3, and an angle adjustment push frame 502 rotatably sleeved on the lifting sleeve 5. The bottom end of the angle adjustment push rod 501 is fixedly connected to the angle adjustment push frame 502. The lifting sleeve 5 is hinged to the two fixed angle frames 4 with connecting rods 503. The axis of the angle adjustment push rod 501 is parallel to the axis of the grinding shaft bracket 306; The extension and retraction of the angle adjustment push rod 501 can drive the angle adjustment push frame 502 to rise and fall along the axis of the grinding shaft frame 306. The angle adjustment push frame 502 drives the lifting sleeve 5 to rotate around the grinding shaft frame 306. The lifting sleeve 5 then drives the two fixed angle frames 4 to rotate synchronously around the hinge point with the grinding shaft frame 306 through the connecting rod 503, thereby realizing the synchronous adjustment of the included angle between the two fixed angle frames 4 and the impact frame 3, thereby changing the grinding angle of the grinding unit and adapting to the processing requirements of different angle chamfering of automotive parts. It can complete the chamfering processing of multiple specifications without changing the grinding parts, which greatly improves the versatility and processing flexibility of the device. Furthermore, the entire angle adjustment process is driven by push rods to achieve mechanical linkage, which has high angle adjustment accuracy and fast response speed, and can accurately match the processing requirements. At the same time, the synchronous adjustment method ensures that the angles of the two grinding units are consistent, avoiding the problem of chamfer angle deviation. The power switching unit is configured as follows: Switch the grinding spindle 306 to unidirectional or reciprocating rotation; When the grinding shaft holder 306 rotates in one direction, it drives the external rotating shaft 307 and the grinding shaft holder 306 to rotate synchronously. When the grinding shaft holder 306 reciprocates, it drives the impact holder 3 to vibrate up and down, and drives the external rotating shaft 307 and the grinding shaft holder 306 to rotate asynchronously.

[0023] This power switching unit integrates the dual functions of switching the rotation mode of the grinding shaft holder 306 and switching the transmission relationship between the external rotating shaft 307 and the grinding shaft holder 306. Through the switching of a single dual-head motor 602 in conjunction with the mechanical transmission structure, it realizes power adaptation for different processing stages of roughing and finishing, eliminating the need for multiple power sources, simplifying the overall structure of the device, and reducing the manufacturing cost and maintenance difficulty of the equipment. At the same time, the mechanical structure switching method has a rapid response and high transmission stability, enabling seamless switching from roughing to finishing, improving the overall processing efficiency. It can also precisely control the rotation mode of the grinding shaft holder 306 and the transmission relationship between the external rotating shaft 307 and the grinding shaft holder 306 according to processing requirements, ensuring the process requirements of different processing stages. This allows the device to have both the high-efficiency grinding capability of the roughing stage and the high-precision processing effect of the finishing stage. The power switching unit includes a power slide 6 slidably connected to the carrier 2. A switching push rod 601 is installed between the power slide 6 and the carrier 2. A dual-head motor 602 is fixedly mounted on the power slide 6 and rotatably connected to a clutch shaft 603 and a first eccentric wheel 605. A transmission guide wheel 604 is installed on one output shaft end of the dual-head motor 602, and a second bevel gear is installed on both the output shaft end and the clutch shaft 603. The two second bevel gears mesh orthogonally. A follower roller 305 is rotatably mounted on the impact frame 3, and the first eccentric wheel 605 abuts against the follower roller 305. In a preferred embodiment, the width of the first eccentric wheel 605 is 1.1 times the length of the follower roller 305; In a preferred embodiment, the dual-head motor 602 integrates an encoder, which is connected to the microcontroller 102 to precisely control the output parameters of the dual-head motor 602. The axis of the switching push rod 601 is perpendicular to the axis of the drive shaft 202 and parallel to the axes of the first eccentric wheel 605, the follower roller 305 and the clutch shaft 603; A drive bevel gear is mounted on the clutch shaft 603, and a driven bevel gear that meshes with the drive bevel gear is mounted on the top of the inner core shaft 205. A third bevel gear is installed on the other output shaft end of the dual-head motor 602 and on the first eccentric wheel 605, and the two third bevel gears mesh orthogonally. The transmission ratio of the third bevel gear is 1:1, which enables the synchronous rotation of the dual-head motor 602 and the first eccentric wheel 605. The frame 2 is rotatably connected to a drive shaft 202, a one-way prism shaft 203, a reciprocating prism shaft 204, an inner core shaft 205, and two driven shafts 206. Driven guide wheels 207 are installed on both the drive shaft 202 and the one-way prism shaft 203. A third synchronous belt is driven to the drive shaft 202, and both driven shafts 206 are driven to the third synchronous belt. A third pulley connected to the third synchronous belt is installed on both the drive shaft 202 and the two driven shafts 206; Two driven guide wheels 207 are respectively arranged on the left and right sides of the transmission guide wheel 604. Both the transmission guide wheel 604 and the driven guide wheel 207 are provided with knurled transmission patterns. One-way shaft 203 is connected to one-way shaft 304 for transmission, and reciprocating shaft 204 is connected to reciprocating shaft 303 for transmission. The top of inner core shaft 205 is equipped with a passive bevel gear that meshes with the power bevel gear. Inner core shaft 205 is connected to outer rotating shaft 307 for transmission. Incomplete gears 208 are installed on both driven shafts 206. Reciprocating gear 201 is installed on reciprocating shaft 204. The two incomplete gears 208 are alternately connected to reciprocating gear 201 for transmission.

[0024] Two incomplete gears 208 are respectively set on both sides of the reciprocating gear 201. The central angle corresponding to the effective meshing tooth segment on the incomplete gear 208 is 120°, and the installation phase difference between the effective meshing tooth segments on the two incomplete gears 208 is 180°.

[0025] By setting the gear ratio between the incomplete gear 208 and the reciprocating gear 201, the incomplete gear 208 rotates once, driving the reciprocating gear 201 to rotate 2.5 times. The unidirectional shaft 203 has a first connecting groove with an open bottom end and slidably connected to the unidirectional shaft 304. The reciprocating shaft 303 has a second connecting groove with an open bottom end and slidably connected to the reciprocating shaft 204. The top of the external rotating shaft 307 has a third connecting groove that slidably connects to the inner core shaft 205. The cross-sections of the unidirectional shaft 304, the reciprocating shaft 303, the inner core shaft 205, the first connecting groove, the second connecting groove, and the third connecting groove are all regular hexagonal.

[0026] The unidirectional prism shaft 203, reciprocating prism shaft 204, inner core shaft 205, and the corresponding first connecting groove, second connecting groove, and third connecting groove are all set with regular hexagonal cross sections. This ensures the circumferential transmission between the prism shaft and the connecting groove, so that the rotational power of the prism shaft can be stably transmitted to the corresponding shaft. It also realizes the axial sliding fit between the prism shaft and the connecting groove, which satisfies the continuity of the transmission connection during the lifting of the impact frame 3 and the sliding of the power slide 6, avoids the interruption of transmission due to the linear motion of the components, and ensures the linkage stability of each motion mechanism of the device. Meanwhile, the top-opening connecting groove structure facilitates the assembly and disassembly of the shaft and the connecting groove, reducing the assembly difficulty and later maintenance cost of the device. Compared with other polygons, the regular hexagonal structure design results in more uniform transmission force, which can effectively reduce wear during transmission and improve the service life and transmission accuracy of components. In a preferred embodiment, the reciprocating rotation of the grinding shaft 306 combined with the up-and-down impact motion of the impact frame 3 is suitable for the roughing stage of chamfering grinding of automotive parts. The unidirectional rotation of the grinding shaft holder 306 is suitable for the finishing stage of chamfering grinding of automotive parts; During operation, under the driving action of the switching push rod 601, the transmission guide wheel 604 abuts against the driven guide wheel 207 on the one-way prism shaft 203 and maintains the transmission connection relationship with the driven guide wheel 207 on the drive shaft 202. When the transmission guide wheel 604 rotates, the grinding shaft frame 306 rotates unidirectionally or in a directional manner. When the grinding shaft frame 306 rotates unidirectionally, due to the position setting of the power slide 6, the power bevel gear and the driven bevel gear disengage. Since a wear-resistant damping washer is embedded between the rotating mating surface of the outer rotating shaft 307 and the grinding shaft frame 306, the damping washer provides a preset static friction force, so that the outer rotating shaft 307 rotates synchronously with the grinding shaft frame 306 when there is no external power. When the clutch shaft 603 loses power, the outer rotating shaft 307, the inner core shaft 205 and the grinding shaft frame 306 rotate synchronously. Furthermore, after the grinding shaft frame 306 rotates in one direction, due to the position setting of the power slide 6 and the ratio setting of the wheel width of the first eccentric wheel 605 to the length of the follower roller 305, the first eccentric wheel 605 and the follower roller 305 lose their contact relationship. When the dual-head motor 602 is working, the first eccentric wheel 605 is misaligned with the follower roller 305, and the impact frame 3 does not produce up-and-down vibration. Meanwhile, before the grinding shaft holder 306 switches to the unidirectional rotation state, the drive shaft 202 is pre-rotated by the transmission guide wheel 604, so that the effective meshing tooth segments of the two incomplete gears 208 are completely misaligned with the reciprocating gear 201, so as to avoid interference with the unidirectional rotation and thus not affect the unidirectional rotation of the grinding shaft holder 306. When the grinding shaft holder 306 needs to reciprocate, under the driving action of the switching push rod 601, the transmission guide wheel 604 and the driven guide wheel 207 on the one-way prism 203 lose their contact and transmission connection. The driven guide wheel 207 on the drive shaft 202 abuts against the transmission guide wheel 604 and maintains transmission. After the drive shaft 202 rotates, the grinding shaft holder 306 is finally made to reciprocate through the transmission of the two driven shafts 206. In this state, the first eccentric wheel 605 abuts against the follower roller 305, the power bevel gear meshes with the passive bevel gear, and the external rotating shaft 307 rotates asynchronously with the grinding shaft holder 306.

[0027] By precisely controlling the position of the power slide 6 through the switching push rod 601, the contact switching between the transmission guide wheel 604 and different driven guide wheels 207 is realized, thereby completing the mode switching between unidirectional rotation during fine grinding and reciprocating rotational impact during rough grinding of the grinding shaft frame 306. At the same time, the contact switching between the first eccentric wheel 605 and the follower roller 305, and the meshing switching between the power bevel gear and the driven bevel gear are realized in conjunction with the operation, so that the device can achieve precise adaptation of motion and transmission in different processing stages. During the roughing stage, the grinding shaft 306 reciprocates and rotates in conjunction with the up-and-down impact motion of the impact frame 3. The grinding bar 403 performs the impact motion while grinding, which can quickly remove the machining allowance of the parts and improve the roughing efficiency. In addition, the external rotating shaft 307 rotates asynchronously with the grinding shaft 306, which can change the grinding trajectory of the grinding bar 403 and avoid the problem of a single grinding pattern during the roughing process. In the finishing stage, the grinding shaft 306 rotates unidirectionally, the impact frame 3 stops impacting, and the grinding bar 403 performs a smooth grinding motion. At the same time, the external rotating shaft 307 rotates synchronously with the grinding shaft 306 to ensure the uniformity of the grinding trajectory and achieve high-precision finishing. This allows the roughing and finishing of the chamfering of the parts to be completed on the same device without the need to transfer the parts, which greatly improves the processing efficiency. The specific steps for using this invention are as follows: In the preparation stage, the solid bar billets, hollow tube billets, or cylindrical billet parts to be processed are placed on the processing tray 104 on the sludge collection box 103 at the bottom of the frame 1. The electric clamp 8 fixes the parts, and the clamping motor drives the bidirectional lead screw to rotate. With the help of the left-hand thread section and the right-hand thread section on the screw, the two clamps slide synchronously towards each other to achieve uniform clamping of parts of different specifications. At the same time, the processing parameters are preset by the single-chip microcomputer 102 at the top of the frame 1, and the ball screw lifting mechanism 101 drives the carrier 2 to rise and fall to the appropriate processing height. The pump in the coolant reservoir 7 is in standby state in advance to prepare for subsequent processing. During the working phase, the two modes of rough grinding and fine grinding can be precisely switched through the power switching unit; During the rough grinding stage, the switching push rod 601 drives the power slide 6 to move, causing the transmission guide wheel 604 to engage with the driven guide wheel 207 on the drive shaft 202 and disengage from the driven guide wheel 207 on the unidirectional prism shaft 203. The drive shaft 202 drives the two driven shafts 206 to rotate via the third synchronous belt. Two incomplete gears 208 with an effective meshing tooth segment center angle of 120° and a phase difference of 180° alternately mesh with the reciprocating gear 201, driving the reciprocating prism shaft 204 to rotate the reciprocating shaft 303. The grinding shaft frame 306 reciprocates via the first synchronous belt. At the same time, the dual-head motor 602 drives the first eccentric wheel 605 to rotate and engage with the follower roller 305. The elastic action of the three first springs 301 drives the grinding shaft frame 306 to rotate. The impact frame 3 performs up-and-down impact motion. In this state, the power bevel gear meshes with the driven bevel gear, and the external rotating shaft 307 and the grinding shaft frame 306 rotate asynchronously. The external rotating shaft 307 drives the wheel shaft 401 to rotate through the orthogonal meshing of the first bevel gear. The second eccentric wheel 402 on the wheel shaft 401 abuts and cooperates with the driven roller 405. Combined with the elastic reset of the second spring 404, the grinding bar 403 slides back and forth on the fixed angle frame 4. The differential shaft 302 and the second synchronous belt ensure that the grinding bars 403 of the two grinding units move synchronously. The grinding bar 403 is accompanied by impact motion while reciprocating grinding. It can also change the grinding trajectory through asynchronous rotation, quickly remove the machining allowance of the parts, avoid the grinding pattern being monotonous, and greatly improve the roughing efficiency. If different angle chamfering is required, the angle adjustment push rod 501 extends and retracts to drive the angle adjustment push frame 502 to rise and fall, drive the lifting sleeve 5 to rotate, and adjust the angle between the two fixed angle frames 4 and the impact frame 3 synchronously through the connecting rod 503, so as to achieve precise adjustment of the grinding angle without replacing the grinding parts. During the fine grinding stage, the switching push rod 601 drives the power slide 6 to move again, causing the transmission guide wheel 604 to engage with the driven guide wheel 207 on the one-way prism 203 and disengage from the driven guide wheel 207 on the drive shaft 202. The one-way prism 203 drives the one-way shaft 304 to rotate, which, through the first synchronous belt, causes the grinding shaft frame 306 to rotate in one direction. At this time, the first eccentric wheel 605, because its width is 1.1 times the length of the follower roller 305, disengages from the follower roller 305, and the impact frame 3 stops its up-and-down impact motion. The power bevel gear and the driven bevel gear also disengage. The damping washer at the rotational connection between the external rotating shaft 307 and the grinding shaft 306 makes it rotate synchronously with the grinding shaft 306. The grinding bar 403 maintains a smooth reciprocating grinding motion and the grinding trajectory is uniform, achieving high-precision finishing. During the entire processing, the pump body of the coolant tank 7 sprays coolant into the processing area through the metal corrugated nozzle 701 to cool down the grinding part. The waste generated by grinding falls into the sludge collection tank 103 together with the coolant for collection. In the final stage, after the chamfering grinding of the parts is completed, the ball screw lifting mechanism 101 drives the carrier 2 to rise to a safe height, the clamping motor of the electric clamp 8 rotates in the opposite direction, and drives the two clamps to slide back and forth to release the parts. The workers remove the finished parts, turn off all power sources of the device, clean the waste and coolant in the sludge collection tank 103, and inspect and maintain vulnerable parts such as the grinding bar 403, thus completing the entire chamfering grinding process.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A chamfering grinding apparatus for automotive parts, comprising a frame (1) on which a carrier (2) is mounted in a height-adjustable manner, characterized in that, Also includes: The impact frame (3) is slidably connected to the carrier frame (2), and three first springs (301) are installed between the two. The impact frame (3) is rotatably connected to a reciprocating shaft (303), a one-way shaft (304) and a grinding shaft frame (306). The reciprocating shaft (303), the one-way shaft (304) and the grinding shaft frame (306) are connected by a first synchronous belt drive. The grinding shaft frame (306) is coaxially rotatably installed with an external rotating shaft (307) and two symmetrically arranged grinding units are installed at its bottom. The grinding unit includes a fixed angle frame (4) and a wheel axle (401). Two symmetrically arranged hinge bushings are installed on the fixed angle frame (4). Both hinge bushings are hinged to the grinding shaft frame (306). The wheel axle (401) is rotatably connected to the hinge bushings and is drivenly connected to the external rotating shaft (307). Two second eccentric wheels (402) are installed on the wheel axle (401). A grinding bar (403) is slidably connected to the fixed angle frame (4), and a second spring (404) is installed between the two. Two driven rollers (405) are rotatably connected to the grinding bar (403), and the two driven rollers (405) abut against the two second eccentric wheels (402) respectively. The angle adjustment unit is configured to synchronously change the included angle between the two fixed angle frames (4) and the impact frame (3); The power switching unit is configured as follows: Switch the grinding spindle (306) to unidirectional or reciprocating rotation; When the grinding shaft holder (306) rotates in one direction, it drives the external rotating shaft (307) and the grinding shaft holder (306) to rotate synchronously; When the grinding shaft holder (306) reciprocates, it drives the impact holder (3) to vibrate up and down, and drives the external rotating shaft (307) and the grinding shaft holder (306) to rotate asynchronously.

2. The chamfering grinding device for automotive parts according to claim 1, characterized in that, A vertically arranged ball screw lifting mechanism (101) is installed on the frame (1). The ball screw lifting mechanism (101) is connected to the carrier (2) in a transmission manner. The carrier (2) is slidably connected to the frame (1). A single-chip microcomputer (102) is fixedly installed on the upper part of the frame (1).

3. The chamfering grinding device for automotive parts according to claim 1, characterized in that, The bottom of the grinding shaft bracket (306) is rotatably connected to a differential shaft (302). Both the external rotating shaft (307) and the differential shaft (302) are equipped with first bevel gears. The two first bevel gears mesh orthogonally. The differential shaft (302) is driven by a second synchronous belt. Both of the wheel shafts (401) are driven by the second synchronous belt.

4. The chamfering grinding device for automotive parts according to claim 1, characterized in that, The angle adjustment unit includes a lifting sleeve (5) sleeved on the grinding shaft frame (306), an angle adjustment push rod (501) fixed on the impact frame (3), and an angle adjustment push frame (502) rotatably sleeved on the lifting sleeve (5). The bottom end of the angle adjustment push rod (501) is fixedly connected to the angle adjustment push frame (502). The lifting sleeve (5) is hinged to the two fixed angle frames (4) by connecting rods (503).

5. The chamfering grinding device for automotive parts according to claim 1, characterized in that, The power switching unit includes a power slide (6) slidably connected to the carrier (2). A switching push rod (601) is installed between the power slide (6) and the carrier (2). A dual-head motor (602) is fixedly mounted on the power slide (6) and a clutch shaft (603) and a first eccentric wheel (605) are rotatably connected to it. A transmission guide wheel (604) is installed on one output shaft end of the dual-head motor (602), and both the output shaft end and the clutch shaft (603) are equipped with... Equipped with a second bevel gear, the two second bevel gears mesh orthogonally. A follower roller (305) is rotatably mounted on the impact frame (3). A first eccentric wheel (605) abuts against the follower roller (305). A power bevel gear is mounted on the clutch shaft (603). A third bevel gear is mounted on the other output shaft end of the dual-head motor (602) and on the first eccentric wheel (605). The two third bevel gears mesh orthogonally. A drive shaft (2) is rotatably connected to the carrier frame (2). 02), a one-way prism shaft (203), a reciprocating prism shaft (204), an inner core shaft (205), and two driven shafts (206). Driven guide pulleys (207) are mounted on both the drive shaft (202) and the one-way prism shaft (203). A third synchronous belt is driven through the drive shaft (202). Both driven shafts (206) are driven through the third synchronous belt. The one-way prism shaft (203) is driven through the one-way shaft (304). The reciprocating prism shaft (205)... 204) is connected to the reciprocating shaft (303) for transmission. The top end of the inner core shaft (205) is equipped with a passive bevel gear that meshes with the power bevel gear. The inner core shaft (205) is connected to the outer rotating shaft (307) for transmission. Incomplete gears (208) are installed on both driven shafts (206). A reciprocating gear (201) is installed on the reciprocating shaft (204). The two incomplete gears (208) are alternately connected to the reciprocating gear (201).

6. The chamfering grinding device for automotive parts according to claim 5, characterized in that, The axis of the switching push rod (601) is perpendicular to the axis of the drive shaft (202) and parallel to the axes of the first eccentric wheel (605), the follower roller (305) and the clutch shaft (603). The width of the first eccentric wheel (605) is 1.1 times the length of the follower roller (305).

7. The chamfering grinding device for automotive parts according to claim 5, characterized in that, The two driven guide wheels (207) are respectively disposed on the left and right sides of the transmission guide wheel (604). Both the transmission guide wheel (604) and the driven guide wheel (207) are provided with knurled transmission patterns. The two incomplete gears (208) are respectively disposed on both sides of the reciprocating gear (201). The central angle corresponding to the effective meshing tooth segment on the incomplete gear (208) is 120°. The installation phase difference between the effective meshing tooth segments on the two incomplete gears (208) is 180°.

8. The chamfering grinding device for automotive parts according to claim 5, characterized in that, The unidirectional prism shaft (203) has a first connecting groove with an open bottom end and slidably connected to the unidirectional shaft (304). The reciprocating shaft (303) has a second connecting groove with an open bottom end and slidably connected to the reciprocating prism shaft (204). The top of the external rotating shaft (307) has a third connecting groove that slidably connects to the inner core shaft (205). The cross-sections of the unidirectional shaft (304), the reciprocating shaft (303), the inner core shaft (205), the first connecting groove, the second connecting groove, and the third connecting groove are all regular hexagonal.

9. The chamfering grinding device for automotive parts according to claim 1, characterized in that, It also includes a coolant reservoir (7) fixed on the carrier (2), a pump body is installed on the inner top of the coolant reservoir (7), a metal corrugated nozzle (701) is installed at the outlet port of the pump body, a sludge collection tank (103) with an open top is installed at the lower part of the frame (1), a processing platform (104) is installed on the sludge collection tank (103), and an electric clamp (8) is installed on the frame (1) and adjacent to the processing platform (104).

10. The chamfering grinding apparatus for automotive parts according to claim 9, characterized in that, The electric clamp (8) includes a bidirectional lead screw rotatably connected to the frame (1) and a clamping motor fixedly mounted on the frame (1). The output shaft end of the clamping motor is fixedly connected to the bidirectional lead screw. The bidirectional lead screw is symmetrically provided with a left-hand threaded section and a right-hand threaded section. Both the left-hand threaded section and the right-hand threaded section are connected to clamps. Both clamps are slidably connected to the frame (1).

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