Shaft part grinding equipment

Abstract

The invention relates to grinding equipment for shaft parts, and belongs to the technical field of grinding equipment. Comprising a rack; the workbench is mounted on the rack; the angle adjusting part is provided with a first rotating part and a second rotating part; the polishing driving shaft is provided with a first mounting part and a second mounting part; one end of each first telescopic arm is rotationally mounted on the first mounting part, and a transmission wheel is arranged at the other end of each first telescopic arm; one end of each second telescopic arm is rotationally mounted on the second mounting part, and the other end of each second telescopic arm is also provided with a transmission wheel; and one group of grinding belts is wound on the first mounting part and the two first telescopic arms, and the other group of grinding belts is wound on the second mounting part and the two second telescopic arms, so that two grinding surfaces are respectively formed. The shaft body polishing device is used for solving the technical problems that in the prior art, effective and rapid polishing of a positioning groove with an annular groove provided with an inclined face in a shaft body in die production cannot be achieved, and the machining angle or a tool still needs to be correspondingly adjusted.

Description

Technical Field

[0001] This invention belongs to the technical field of grinding equipment, and specifically relates to a grinding equipment for shaft parts. Background Technology

[0002] In the manufacturing of precision injection molded products such as optical lenses or precision pen-shaped models, the mold core, as a core molding component, directly determines the dimensional tolerances, surface quality, and assembly compatibility of the final product through its machining accuracy. Shaft components are key parts of such mold cores, widely used in scenarios such as positioning shafts for lens production mold cores and molding shafts for pen-shaped model mold cores. These shaft parts not only need to ensure high coaxiality and low surface roughness on their outer cylindrical surfaces to meet the molding stability after mold core assembly, but also often require the machining of positioning grooves at specific locations on the shaft. To accommodate subsequent assembly positioning, sealing fit, or stress dispersion requirements, these positioning grooves are often designed as annular grooves or structures with bevels, and the perpendicularity error requirements between the groove bevel and the outer cylindrical surface of the shaft and the flange end face are high. In the actual production process, the machining of such shaft parts requires multiple processes, including rough forming by turning, heat treatment strengthening, and fine grinding, among which grinding is the core link to ensure the final accuracy. For the machining of the outer surface of the shaft, the flange end face, and the annular positioning groove, the industry currently mostly uses belt abrasive grinding equipment in conjunction with a surface bonding mechanism. When machining the shaft of lens mold cores and pen-shaped model mold cores, the annular positioning groove and the groove structure with bevels have many customized features. The existing machining process and equipment require operators to stop the machine multiple times to adjust the machining angle of the grinding equipment, change special tooling fixtures, and correct machining defects by manual grinding.

[0003] The existing technology has at least the following problems in its use: The surface bonding mechanism can only increase the contact area between the surface of the abrasive belt and the surface of the shaft parts. It cannot effectively and quickly grind the annular groove with a beveled positioning groove on the shaft in mold production. The machining angle or tooling still needs to be adjusted accordingly. Summary of the Invention

[0004] This invention provides a grinding equipment for shaft parts, which solves the technical problem that the existing technology cannot effectively and quickly grind the positioning groove with annular groove with inclined surface on the shaft body in mold production, and still requires corresponding adjustment of the processing angle or tooling.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: A grinding machine for shaft parts includes: a frame; a clamping base mounted on the frame, having a centering turntable rotatably mounted on the clamping base for coaxially fixing the shaft part and driving it to rotate around its own central axis; a worktable mounted on the frame; an angle adjustment unit having a first rotating part and a second rotating part, the first rotating part being mounted on the side of the worktable near the centering turntable, and the second rotating part being mounted on the other side of the worktable away from the centering turntable; a grinding drive shaft having a first mounting part and a second mounting part; two first telescopic arms, one end of the first telescopic arm being rotatably mounted on the first mounting part, and the other end being provided with a transmission wheel; two second telescopic arms, one end of the second telescopic arm being rotatably mounted on the second mounting part, and the other end also being provided with the transmission wheel; and two sets of grinding belts, one set of grinding belts being wound around the first mounting part and the two first telescopic arms, and the other set of grinding belts being wound around the second mounting part and the two second telescopic arms, respectively forming two grinding surfaces.

[0006] Furthermore, a clamping part and a driving part are also provided. The driving part is mounted on the clamping part. The clamping part includes: a clamping bracket mounted on the frame; a centering telescopic rod, one end of which is fixedly mounted on the clamping bracket and extends and retracts along the central axis of the shaft-like part; a rotating centering head rotatably mounted on the other end of the centering telescopic rod and coaxially arranged with the centering turntable, the rotating centering head abutting against the end face of the part; and a synchronous transmission component fixed on the clamping bracket and drivingly connected to the rotating centering head to ensure that the rotating centering head rotates synchronously with the centering turntable.

[0007] Furthermore, the grinding belt between the two first telescopic arms or the grinding belt between the two second telescopic arms each forms a corresponding grinding surface. The first rotating part and the second rotating part are adjustable in height, and the first rotating part and the second rotating part are rotatably connected to the bottom of the worktable via hinges. By changing the height difference between the first rotating part and the second rotating part, the tilt angle of the worktable is achieved, thereby changing the orientation of the grinding surface relative to the horizontal plane, so that the grinding surface fits the groove to be processed. After the first rotating part and the second rotating part are fixed, the matching degree between the grinding surface and the inclined plane is further fine-tuned by adjusting the telescopic length of the first telescopic arm and the second telescopic arm.

[0008] Furthermore, it also includes: a vision unit, mounted on the frame, for acquiring the inclined angle and position information of the annular positioning groove of shaft parts, so as to dynamically adjust the grinding angle; and an illumination unit, set on the frame, for assisting the vision unit in data acquisition and providing supplementary lighting to the acquisition area.

[0009] Furthermore, it also includes a stroke drive unit, which includes: a radial drive member that drives the worktable to move closer to or away from the shaft surface; a main drive rod that is pulsatorically connected to the first mounting part and the second mounting part respectively; a first adjusting sleeve rod that is rotatably sleeved outside the main drive rod and is used to drive the first telescopic arm to rotate around the central axis of the main drive rod; and a second adjusting sleeve rod that is rotatably sleeved outside the first adjusting sleeve rod and is used to drive the second telescopic arm to rotate around the central axis of the main drive rod.

[0010] Furthermore, it also includes: a marking unit, installed on the frame, used to accurately calibrate the machining range of the annular positioning groove of shaft parts; a vision acquisition unit, installed on the vision unit, used to acquire the real-time position information of the inclined angle, groove depth and grinding surface of the annular positioning groove, and the stroke drive unit adjusts the output angle according to the acquired information.

[0011] Furthermore, it also includes: a dust collection system installed beside the centering turntable where the grinding belt is located, for collecting metal scrap and dust generated during the grinding process; and a temperature monitoring unit installed near the grinding belt for monitoring the temperature of the grinding area.

[0012] Furthermore, the centering turntable is provided with multiple radial adjustment grooves, and a centering clamping block is slidably disposed in the radial adjustment groove. The centering clamping block is provided with an arc-shaped clamping surface. By adjusting the position of the centering clamping block in the radial adjustment groove, it can be adapted to centering and clamping shaft parts of different diameters.

[0013] Furthermore, pressure sensors are provided at the ends of the first and second telescopic arms. The pressure sensors provide real-time feedback on the contact pressure between the grinding belt and the inclined surface of the shaft-like part to adjust the contact size of the grinding surface.

[0014] This invention provides a grinding equipment for shaft parts, which has the following advantages: The dual-grinding surface design, formed by two sets of telescopic arms corresponding to the first and second mounting sections, enables adaptive switching between grinding and polishing / grinding of localized processes for the same type of shaft parts with different surface finish requirements, adapting to diverse processing needs. The hinged connection between the angle adjustment unit and the worktable allows for flexible adjustment of the grinding surface tilt angle. Combined with fine-tuning of the telescopic arm length, it enables rapid grinding of beveled annular positioning grooves and uniquely inclined surfaces without tooling adjustments. A vision unit enables precise acquisition and dynamic adjustment of bevel angle and position information, improving grinding accuracy. The synergistic effect of pressure sensors and temperature monitoring units ensures stable grinding force and controllable processing temperature, preventing accuracy deviations caused by abnormal processing parameters. The radial adjustment groove of the centering turntable and the centering clamping block enable centering and clamping of shaft parts with different diameters, enhancing the equipment's versatility. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a grinding equipment for shaft parts provided in an embodiment of the present invention; Figure 2 This is another structural schematic diagram of a grinding equipment for shaft parts provided in an embodiment of the present invention; Figure 3 for Figure 2 Enlarged view of point A1 in the middle; Figure 4 A top view of a grinding equipment for shaft parts provided in an embodiment of the present invention; Figure 5 A front view of a grinding equipment for shaft parts provided in an embodiment of the present invention; Figure 6 A schematic diagram of the installation structure of the workbench, angle adjustment unit, first telescopic arm, and second telescopic arm provided in an embodiment of the present invention; Figure 7 for Figure 6 Another structural diagram of the installation structure; Figure 8 for Figure 7 Front view of the installation structure; Figure 9 For along Figure 8 A cross-sectional view of the AA path unfolded in the middle; Figure 10 For along Figure 8 A cross-sectional view of the BB path expansion; Figure 11 for Figure 10 A schematic diagram of the structure after the second rotating part in the middle is driven; Figure 12 for Figure 10 A schematic diagram of the structure after the first rotating part is driven.

[0017] In the diagram: 11-Frame; 12-Clamping seat; 121-Centering turntable; 122-Radial adjustment groove; 123-Centering clamping block; 1231-Arc-shaped clamping surface; 13-Worktable; 14-Angle adjustment part; 141-First rotating part; 142-Second rotating part; 15-Grinding drive shaft; 151-First mounting part; 152-Second mounting part; 16-First telescopic arm; 161-Transmission wheel; 17-Second telescopic arm 18-Retractable arm; 19-Grinding belt; 10-Clamping part; 11-Drive part; 12-Clamping bracket; 193-Centering telescopic rod; 194-Rotating centering head; 195-Synchronous transmission component; 20-Vision unit; 21-Illumination unit; 23-Marking unit; 221-Radial drive component; 223-Main drive rod; 224-First adjusting sleeve rod; 225-Second adjusting sleeve rod; 26-Dust collection system; 27-Workpiece. Detailed Implementation

[0018] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0019] like Figures 1 to 12 As shown, this embodiment provides a grinding equipment for shaft parts, including: a frame 11, a clamping base 12 mounted on the frame 11, having a centering turntable 121, the centering turntable 121 being rotatably mounted on the clamping base 12 for coaxially fixing the shaft part and driving it to rotate around its own central axis; a worktable 13 mounted on the frame 11; an angle adjustment part 14 having a first rotating part 141 and a second rotating part 142, the first rotating part 141 being mounted on the side of the worktable 13 near the centering turntable 121, and the second rotating part 142 being mounted on the other side of the worktable 13 away from the centering turntable 121; grinding. The drive shaft 15 has a first mounting portion 151 and a second mounting portion 152; two first telescopic arms 16, one end of which is rotatably mounted on the first mounting portion 151, and the other end of which is provided with a transmission wheel 161; two second telescopic arms 17, one end of which is rotatably mounted on the second mounting portion 152, and the other end of which is also provided with the transmission wheel 161; and two sets of grinding belts 18, one set of grinding belts 18 is wound around the first mounting portion 151 and the two first telescopic arms 16, and the other set of grinding belts 18 is wound around the second mounting portion 152 and the two second telescopic arms 17, forming two grinding surfaces respectively.

[0020] In this embodiment, the frame 11 is made of high-strength cast iron and is integrally formed by CNC machining center to ensure the overall rigidity and stability of the equipment; the clamping seat 12 is fixed to the middle area of ​​the frame 11 by bolts, and its surface is provided with precision positioning pin holes to facilitate the accurate installation of the centering turntable 121; the centering turntable 121 is made of 45# steel with heat treatment to ensure wear resistance; the worktable 13 is made of aluminum alloy to reduce the load on the equipment while ensuring structural strength; the first rotating part 141 and the second rotating part 142 of the angle adjustment part 14 are symmetrical. Distributed on both sides of the bottom of the worktable 13, the grinding drive shaft 15 is connected to the worktable 13 by stainless steel hinges. The grinding drive shaft 15 is made of alloy structural steel and has undergone carburizing and quenching treatment. The first mounting part 151 and the second mounting part 152 are staggered along the drive shaft axis with a spacing of 50mm. One set of grinding belts 18 uses diamond-coated abrasive belts for rough grinding, and the other set uses alumina abrasive belts for fine grinding or polishing. The process switching between the two grinding surfaces is achieved by switching the power output of the grinding drive shaft 15, adapting to the processing requirements of different surfaces of the same part. Figures 10 to 12 As shown, the first rotating part 141 is driven alone to lift the front end of the worktable 13 with the grinding surface facing upward; the second rotating part 142 is driven alone to lift the rear end of the worktable 13 with the grinding surface facing downward; rotating hinge seats are provided on both sides of the worktable 13, and a leveling structure is provided between the two rotating hinge seats. The leveling structure is a strip block, which is used to directly abut the upper surface of the radial drive member 221 after the first rotating part 141 and the second rotating part 142 are reset.

[0021] Furthermore, a clamping part 19 and a driving part 191 are also provided. The driving part 191 is mounted on the clamping part 19. The clamping part 19 includes: a clamping bracket 192, which is mounted on the frame 11; a centering telescopic rod 193, one end of which is fixedly mounted on the clamping bracket 192 and extends and retracts along the central axis of the shaft-like part; a rotating centering head 194, which is rotatably mounted on the other end of the centering telescopic rod 193 and is coaxially arranged with the centering turntable 121. The rotating centering head 194 abuts against the end face of the part; and a synchronous transmission member 195, which is fixed on the clamping bracket 192 and is connected to the rotating centering head 194 to ensure that the rotating centering head 194 rotates synchronously with the centering turntable 121.

[0022] In this embodiment, the clamping bracket 192 is welded from channel steel and fixed to the frame 11 with expansion bolts to ensure clamping stability. The centering telescopic rod 193 is an electric push rod with a telescopic stroke range of 0-150mm and a positioning accuracy of ±0.01mm, meeting the clamping requirements of shaft parts of different lengths. The rotating centering head 194 is made of hard alloy material with a wear-resistant ceramic coating on its end face to prevent scratches when in contact with the end face of the part. The synchronous transmission component 195 uses a servo system to ensure that the rotational speed of the rotating centering head 194 and the centering turntable 121 are completely consistent, preventing relative slippage of the parts during processing. The drive unit 191 is a servo-driven telescopic structure used to adjust the distribution height of the clamping unit 19 over a wide range and quickly position it to the upper end face of the workpiece 27. The top of the drive unit 191 is provided with a rotating structure to realize the rotation of the entire structure of the clamping unit 19 on the horizontal plane to facilitate the installation of the shaft workpiece 27.

[0023] Furthermore, the grinding belt 18 between the two first telescopic arms 16 or the grinding belt 18 between the two second telescopic arms 17 each forms a corresponding grinding surface. The first rotating part 141 and the second rotating part 142 are adjustable in height, and the first rotating part 141 and the second rotating part 142 are rotatably connected to the bottom of the worktable 13 via hinges. By changing the height difference between the first rotating part 141 and the second rotating part 142, the tilt angle of the worktable 13 is achieved, thereby changing the orientation of the grinding surface relative to the horizontal plane, so that the grinding surface fits the groove to be processed. After the first rotating part 141 and the second rotating part 142 are fixed, the matching degree between the grinding surface and the inclined plane is further fine-tuned by adjusting the telescopic length of the first telescopic arm 16 and the second telescopic arm 17. The first telescopic arm 16 and the second telescopic arm 17 are distributed in upper and lower layers, and the two sets of telescopic arms realize the switching between grinding and polishing processes. By changing the length and angle of the telescopic arms, the size of the grinding surface and the distance relative to the outer circle of the workpiece 27 are achieved.

[0024] In this embodiment, both the first rotating part 141 and the second rotating part 142 adopt electric lifting rods with a lifting stroke range of 0-30mm. By adjusting the height difference between the two, the tilt angle of the worktable 130-60° can be adjusted to adapt to the processing of groove inclined surfaces with different tilt angles. The first telescopic arm 16 and the second telescopic arm 17 adopt pneumatic telescopic structure with a telescopic stroke of 0-80mm and an adjustment accuracy of ±0.005mm. By finely adjusting the telescopic length, the fit between the grinding belt 18 and the inclined surface of the part is improved, ensuring the uniformity of grinding.

[0025] Furthermore, it also includes: a vision unit 20, mounted on the frame 11, used to collect the inclined angle and position information of the annular positioning groove of the shaft part, so as to dynamically adjust the grinding angle; and an illumination unit 21, set on the frame 11, used to assist the vision unit 20 in data acquisition and to provide supplementary lighting for the acquisition area.

[0026] In this embodiment, the vision unit 20 uses an industrial CCD camera, which is mounted on the crossbeam of the frame 11 near the centering turntable 121. The lens axis is distributed at a 20° angle with the central axis of the shaft-like parts to improve the acquisition accuracy. The illumination unit 21 uses an LED supplementary light to ensure that the markings of the marking unit 23 are clear.

[0027] Furthermore, it also includes a stroke drive unit, which includes: a radial drive member 221, which drives the worktable 13 to move closer to or away from the shaft surface; a main drive rod 223, which is connected to the first mounting part 151 and the second mounting part 152 respectively; a first adjusting sleeve 224, which is rotatably sleeved outside the main drive rod 223, for driving the first telescopic arm 16 to rotate around the central axis of the main drive rod 223; and a second adjusting sleeve 225, which is rotatably sleeved outside the first adjusting sleeve 224, for driving the second telescopic arm 17 to rotate around the central axis of the main drive rod 223.

[0028] In this embodiment, the radial drive component 221 adopts a ball screw slide with a stroke range of 0-200mm and a repeatability of ±0.003mm, ensuring the accuracy of the radial feed of the worktable 13; Figures 6 to 9 As shown, the main drive rod 223 adopts a stepped shaft structure and is driven by a servo motor. The speed can be steplessly adjusted within the range of 0-3000 rpm, providing stable power to the grinding belt 18. The first adjusting sleeve rod 224 and the second adjusting sleeve rod 225 are provided with adjusting gears on their periphery for connecting external servo drive components to control and adjust the distribution angle connection structure between the two first telescopic arms 16 or the second telescopic arms 17 respectively. The rotation angle range is 40°-140°. Driven by a servo motor, the precise steering of the first telescopic arms 16 and the second telescopic arms 17 is achieved. The second mounting part 152 is a sleeve structure sleeved on the main drive rod 223 and connected to an external drive ring. The drive ring is connected by gears to realize the external drive power source. The main drive rod realizes the gear engagement connection between the first mounting part 151 and another independent power source through the stepped structure, as well as the external drive power source. Correspondingly, the power source can be a servo motor and actively controlled by corresponding existing technologies.

[0029] Furthermore, it also includes: a marking unit 23, installed on the frame 11, used to accurately calibrate the machining range of the annular positioning groove of the shaft part; and a vision acquisition unit, installed on the vision unit 20, used to acquire the real-time position information of the inclined angle, groove depth and grinding surface of the annular positioning groove.

[0030] In this embodiment, the marking unit 23 uses a laser marking device to emit a red cross laser line with a line width ≤0.1mm, which can accurately mark the start and end positions of the annular positioning groove. The vision acquisition unit is integrated on the vision unit 20 and uses a 3D structured light acquisition module, which can simultaneously acquire the angle of the inclined surface, the groove depth, and the position deviation information of the grinding surface. The acquisition frequency is 30Hz, which ensures real-time monitoring during dynamic processing and realizes dynamic closed-loop control of the grinding angle.

[0031] Furthermore, it also includes: a dust collection system 26, installed beside the centering turntable 121 where the grinding belt 18 is located, for collecting metal waste and dust generated during the grinding process; and a temperature monitoring unit, installed near the grinding belt 18, for monitoring the temperature of the grinding area.

[0032] In this embodiment, the dust collection system 26 adopts an industrial vacuum cleaner with multiple suction ports distributed in a groove to collect grinding debris. The distance between the suction port and the grinding area is 15-20mm, and the negative pressure value is ≥20kPa, which can efficiently collect metal dust and waste materials, avoiding pollution of the processing environment and affecting the accuracy of the equipment. The temperature monitoring unit adopts an infrared temperature sensor with a measurement range of 0-300℃ and a measurement accuracy of ±1℃. When the temperature exceeds 150℃, the grinding speed is reduced or the processing is paused to avoid deformation of parts due to high temperature.

[0033] Furthermore, the centering turntable 121 is provided with a plurality of radial adjustment grooves 122, and a centering clamping block 123 is slidably disposed in the radial adjustment groove 122. The centering clamping block 123 is provided with an arc-shaped clamping surface 1231. By adjusting the position of the centering clamping block 123 in the radial adjustment groove 122, it can be adapted to centering and clamping shaft parts of different diameters.

[0034] In this embodiment, a hydraulic cylinder is also configured at the bottom of the centering turntable 121 to adjust the machining reference surface. Combined with two layers of distributed grinding surfaces, it allows for switching between different grinding processes or quickly switching between grinding and polishing. Three radial adjustment grooves 122 are evenly spaced on the centering turntable 121, each 10mm wide and 80mm long. An arc-shaped clamping surface 1231 is provided with an anti-slip rubber pad and is fixed within the radial adjustment grooves 122 by locking bolts. This allows for centering and clamping of shaft parts with diameters of 10-100mm, with a clamping coaxiality error ≤0.02mm. The arc-shaped clamping surface 1231 is located at one end of a columnar structure, and the other end has a cross-shaped groove for mating. It is threaded into the centering clamping block 123, which has corresponding threaded holes.

[0035] Furthermore, pressure sensors are provided at the ends of the first telescopic arm 16 and the second telescopic arm 17. The pressure sensors provide real-time feedback on the contact pressure between the grinding belt 18 and the inclined surface of the shaft part, ensuring stable grinding force.

[0036] In this embodiment, the pressure sensor is a miniature strain gauge sensor with a measurement range of 0-50N and a measurement accuracy of ±0.1N. It is installed at the shaft of the transmission wheel 161 and can detect the contact pressure between the grinding belt 18 and the inclined surface of the part in real time. According to the preset grinding force, the pressure is dynamically adjusted by adjusting the extension and retraction of the first telescopic arm 16 and the second telescopic arm 17 by adjusting the corresponding drive structure. The grinding force fluctuation range is ≤±1N, so as to avoid damage to the surface of the part due to excessive pressure or affect the processing efficiency due to insufficient pressure.

[0037] In summary, this invention patent, through the collaborative design of dual mounting parts and dual telescopic arms, achieves flexible switching and adaptable layout of dual grinding surfaces, meeting the needs of different surface processes and local machining of the same part; through the tilting structure of the angle adjustment part 14 and the worktable 13, combined with the precise acquisition of the vision unit 20, it achieves rapid grinding of annular positioning grooves with bevels and special tilted surfaces, without the need for frequent tooling adjustments; through the precise control of the stroke drive unit and the adjusting sleeve, it achieves dynamic optimization of grinding angle, position and pressure, improving machining accuracy and stability; through the synergistic effect of the radial adjustment structure of the centering turntable 121 and the multi-dimensional monitoring unit, it ensures equipment adaptability and controllable machining quality, meeting the high-precision grinding requirements of shaft parts in precision mold production.

Claims

1. A grinding equipment for shaft-type parts, characterized in that, include: Rack (11); A clamping base (12) is mounted on the frame (11) and has a centering turntable (121). The centering turntable (121) is rotatably mounted on the clamping base (12) and is used to coaxially fix shaft parts and drive them to rotate around their own central axis. A workbench (13) is mounted on the frame (11); Angle adjustment unit (14) has a first rotating part (141) and a second rotating part (142). The first rotating part (141) is installed on the side of the worktable (13) close to the centering turntable (121), and the second rotating part (142) is installed on the other side of the worktable (13) away from the centering turntable (121). The grinding drive shaft (15) has a first mounting part (151) and a second mounting part (152). Two first telescopic arms (16), one end of the first telescopic arm (16) is rotatably mounted on the first mounting part (151), and the other end is provided with a transmission wheel (161). Two second telescopic arms (17), one end of which is rotatably mounted on the second mounting part (152), and the other end is also provided with the drive wheel (161). Two sets of grinding belts (18) are provided. One set of grinding belts (18) is wound around the first mounting part (151) and the two first telescopic arms (16), and the other set of grinding belts (18) is wound around the second mounting part (152) and the two second telescopic arms (17), forming two grinding surfaces respectively.

2. The grinding equipment for shaft parts according to claim 1, characterized in that, It also includes a clamping part (19) and a driving part (191), the driving part (191) being mounted on the clamping part (19), the clamping part (19) comprising: A clamping bracket (192) is mounted on the frame (11); The centering telescopic rod (193) is fixedly installed on the clamping bracket (192) at one end and extends and retracts along the central axis of the shaft part; A rotating centering head (194) is rotatably mounted on the other end of the centering telescopic rod (193) and coaxially arranged with the centering turntable (121). The rotating centering head (194) abuts against the end face of the part. Synchronous transmission component (195) is fixed on the clamping bracket (192) and is connected to the rotating centering head (194) to ensure that the rotating centering head (194) and the centering turntable (121) rotate synchronously.

3. The grinding equipment for shaft parts according to claim 2, characterized in that, The grinding surfaces formed between the two first telescopic arms (16) or the grinding belts (18) between the two second telescopic arms (17) are all formed with corresponding grinding surfaces. The first rotating part (141) and the second rotating part (142) are adjustable in height, and the first rotating part (141) and the second rotating part (142) are rotatably connected to the bottom of the worktable (13) by hinges. The tilt angle of the worktable (13) is achieved by changing the height difference between the first rotating part (141) and the second rotating part (142) to change the orientation between the grinding surface and the horizontal plane, so that the grinding surface fits the groove to be processed. After the first rotating part (141) and the second rotating part (142) are fixed, the matching degree between the grinding surface and the inclined plane is further fine-tuned by adjusting the telescopic length of the first telescopic arm (16) and the second telescopic arm (17).

4. The grinding equipment for shaft parts according to claim 3, characterized in that, Also includes: A vision unit (20) is mounted on the frame (11) to collect the inclined angle and position information of the annular positioning groove of shaft parts in order to dynamically adjust the grinding angle. An illumination unit (21) is mounted on the frame (11) to assist the vision unit (20) in data acquisition and to provide supplementary lighting to the acquisition area.

5. A grinding equipment for shaft parts according to claim 4, characterized in that, It also includes a stroke drive unit, the stroke drive unit comprising: The radial drive (221) drives the worktable (13) to move closer to or away from the shaft surface; The main drive rod (223) is connected to the first mounting part (151) and the second mounting part (152) respectively for transmission; The first adjusting sleeve (224) is rotatably sleeved outside the main drive rod (223) and is used to drive the first telescopic arm (16) to rotate around the central axis of the main drive rod (223); The second adjusting sleeve (225) is rotatably sleeved outside the first adjusting sleeve (224) and is used to drive the second telescopic arm (17) to rotate around the central axis of the main drive rod (223).

6. The grinding equipment for shaft parts according to claim 5, characterized in that, Also includes: The marking unit (23) is installed on the frame (11) and is used to accurately mark the machining range of the annular positioning groove of the shaft part; A vision acquisition unit is installed on the vision unit (20) to acquire the slope angle, groove depth and real-time position information of the grinding surface of the annular positioning groove. The stroke drive unit adjusts the output angle according to the acquired information.

7. A grinding equipment for shaft parts according to claim 6, characterized in that, Also includes: A dust collection system (26) is installed on the side of the centering turntable (121) to collect metal scrap and dust generated during the grinding process; A temperature monitoring unit is installed near the grinding belt (18) to monitor the temperature of the grinding area.

8. A grinding equipment for shaft parts according to claim 7, characterized in that, The centering turntable (121) is provided with multiple radial adjustment grooves (122), and a centering clamp (123) is slidably arranged in the radial adjustment groove (122). The centering clamp (123) is provided with an arc-shaped clamping surface (1231) to adjust the position of the centering clamp (123) in the radial adjustment groove (122).

9. A grinding equipment for shaft parts according to claim 8, characterized in that, Pressure sensors are provided at the ends of the first telescopic arm (16) and the second telescopic arm (17). The pressure sensors provide real-time feedback on the contact pressure between the grinding belt (18) and the inclined surface of the shaft part to adjust the contact size of the grinding surface.

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