Numerical control grinding system for round bar materials

Abstract

This invention relates to the field of automated processing equipment technology, specifically a CNC grinding system for round bar materials, including a turntable feeding mechanism, a feeding mechanism, an end face grinding mechanism, an inner and outer shaft material transfer mechanism, an end face chamfering mechanism, a discharge mechanism, a lead screw support assembly, a right translation slide assembly, and a guide ring. The turntable feeding mechanism is equipped with a V-groove rotary disk driven by a servo motor to achieve automatic centering and indexing of the workpiece. The end face grinding mechanism is symmetrically arranged on both sides, with double end face grinding wheels arranged in an inclined V-shape. It works in conjunction with a fixed stop ring and an elastic support stop ring to achieve precise axial positioning of the workpiece and synchronous grinding of both end faces. The inner and outer shaft material transfer mechanism adopts a nested structure of an inner rotating shaft and a hollow rectangular outer rotating shaft. It achieves separate control of workpiece rotation and axial feed through an independent servo motor. The end face chamfering mechanism is provided on both sides, driven by a combination of inclined slides and horizontal slides, to achieve stepless adjustment of the chamfer angle and width.

Description

Technical Field

[0001] This invention relates to the technical field of automated end-face processing equipment for round bars and tubular metal workpieces, and specifically to a CNC grinding system for round bar materials, which is particularly suitable for integrated continuous CNC machining of end-face grinding and chamfering of round bars. Background Technology

[0002] Round bars and tubular materials are widely used in machinery manufacturing, hardware processing, automotive parts, and construction machinery. After blanking, the two ends of the workpieces often have problems such as slanted cuts, burrs, oxide scale, and length deviations, requiring end face grinding and chamfering. Traditional processing often uses single-machine decentralized operations, with manual or simple equipment performing end face grinding first, and then transferring the workpieces to a chamfering machine for further processing. This has drawbacks such as cumbersome procedures, time-consuming transfers, and inconsistent reference standards. Some integrated equipment uses linear feeding, single-axis drive, and fixed-angle single-end chamfering structures, which suffer from problems such as inaccurate workpiece positioning, easy slippage and wobble, uneven chamfering, large angle deviations, easy wear of grinding wheels, poor batch consistency, and low automation, making it difficult to meet the requirements of high-precision, high-efficiency, and continuous production.

[0003] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems of the prior art and provide a CNC grinding system for round bar materials. This system addresses the issues of fragmented processes and inconsistent processing benchmarks in existing round bar end-face processing methods, overcomes the shortcomings of traditional equipment such as poor workpiece positioning accuracy and easy slippage during processing, and solves the problem of the inability to continuously and automatically connect end-face grinding and chamfering processes. This system integrates automatic feeding, V-groove rotary table indexing and positioning, dual-end synchronous end-face grinding, internal and external shaft composite material transfer, dual-slide stepless chamfering, and automatic unloading into a single CNC grinding system. It achieves continuous processing by first grinding to establish the benchmark and then chamfering to maintain accuracy, significantly improving processing accuracy, stability, and production efficiency.

[0005] The above objectives are achieved through the following technical solutions: A CNC grinding system for round bar materials includes a rotary feeding mechanism, a feeding mechanism, an end face grinding mechanism, an inner and outer shaft material transfer mechanism, an end face chamfering mechanism, a discharge mechanism, a lead screw support assembly, a right translation slide assembly, and a guide ring. These mechanisms are arranged sequentially along the workpiece processing flow, enabling continuous operation throughout the entire process, including automatic feeding, indexing and positioning, simultaneous double-end grinding, composite material transfer, double-end chamfering, and automatic discharge.

[0006] Furthermore, the turntable material feeding mechanism is the core positioning and indexing conveying component of the system. It includes symmetrically arranged turntable support seats on the left and right sides, with vertically arranged turntable support plates fixed on the turntable support seats, and an end face grinding mechanism mounting position. A turntable servo motor is installed on the outer side of the left turntable support plate, and its output shaft passes through the left turntable support plate and connects to the turntable insertion post; the other end of the insertion post passes through the right turntable support plate and is movably connected to the insertion post support seat through a bearing to ensure smooth rotation.

[0007] The center of the V-groove rotary disk is fitted with a rotary disk insertion post; several insertion post guide grooves are opened on the outer wall of the insertion post, and matching insertion post guide blocks are set in the inner hole of the V-groove rotary disk to realize quick assembly and circumferential anti-rotation. The corresponding specification V-groove rotary disk can be quickly replaced according to the diameter of the workpiece.

[0008] The V-groove rotating disk has several V-shaped workpiece grooves evenly spaced around its circumference. Utilizing the automatic centering characteristic of the V-shaped surface, the round bar workpiece is automatically centered, ensuring uniform grinding and chamfering allowances at both ends.

[0009] The inner side of the turntable support plate is equipped with a left end face retaining ring and a right end face retaining ring for the workpiece. The left retaining ring is a fixed reference ring, while the right retaining ring is elastically connected to the springs via multiple spring shafts, which can compensate for workpiece length errors and ensure axial positioning stability. A notch is provided in the retaining ring at the corresponding grinding station position to allow the end face grinding wheel to extend and process.

[0010] The first workpiece clamping assembly is used to clamp the workpiece at the grinding station. It includes symmetrical roller assemblies, belts, and roller tensioning mechanisms. The roller assembly includes a first roller, a second roller, a third roller, and a fourth roller. Each roller is mounted on the turntable support plate via a roller shaft. The belt wraps around each roller and fits tightly against the arc-shaped surface of the V-groove turntable, stably constraining the workpiece within the V-groove and preventing the workpiece from slipping out or jumping during rotation indexing and end face grinding.

[0011] The roller tensioning mechanism includes a tensioning block groove on the turntable support plate, a slidable roller shaft slider, and a tensioning screw; by adjusting the position of the slider with the tensioning screw, the third roller is moved to achieve precise adjustment of the belt tension.

[0012] Furthermore, the feeding mechanism is located at the feeding end of the rotary stacking mechanism, and is composed of a left box and a right box. The inside of the box is equipped with a guide slope, and a feeding channel is opened on the side facing the V-groove rotary disk. After the round bar workpieces are placed into the box, they enter the V-shaped workpiece groove one by one in an orderly manner under the action of their own gravity and the rotation driving force of the V-groove rotary disk to complete the automatic feeding and stacking.

[0013] Furthermore, the end face grinding mechanism is symmetrically arranged on the left and right sides of the V-groove rotary disk, and each group includes an end face grinding shaft, an end face grinding wheel, an end face grinding slide assembly, and an end face grinding shaft support.

[0014] The end face grinding spindle is driven to rotate by a power source, and the end face grinding wheel is installed at the front end. The spindle is fixed to the end face grinding slide assembly through a spindle support. The slide is a lead screw slide, which realizes the horizontal feed and position adjustment of the grinding wheel.

[0015] The grinding wheel spindles on both ends are mounted at an inclined V-shape, which, in conjunction with the axial positioning of the workpiece, enables simultaneous and efficient grinding of both end faces, correcting the flatness, perpendicularity, and overall length of the end faces. The turntable support plate has a grinding wheel slot, allowing the grinding wheel to extend into and grind the workpiece end faces.

[0016] Furthermore, the inner and outer shaft material transfer mechanism receives the ground workpiece and realizes the workpiece's rotation and axial movement, including left and right symmetrical inner and outer shaft assemblies, a second workpiece pressing assembly, a stop bar, and a lead screw support assembly.

[0017] The inner and outer shaft assemblies adopt a coaxial nested structure: the inner rotary shaft is a solid optical shaft, driven by an inner rotary servo motor to rotate at high speed, causing the workpiece to rotate; the outer rotary shaft is a hollow rectangular shaft, fitted outside the inner rotary shaft, driven independently by an outer rotary servo motor to rotate at low speed, pushing the workpiece forward along the axial direction. The inner and outer shafts are supported by bearings and can rotate relative to each other. By controlling different speeds in the same direction, high-speed rotation and low-speed feed of the workpiece can be achieved simultaneously, meeting the requirements of chamfering.

[0018] The inner rotating shaft is connected to an inner rotating servo motor at its front end and movably connected to the rear support of the rotating shaft at its rear end; the outer rotating shaft is connected to an outer rotating servo motor at its rear end and movably connected to the front support of the rotating shaft at its front end, ensuring rotational accuracy and structural rigidity.

[0019] The outer wall of the outer rotating shaft is provided with a rectangular groove for supporting and pushing the workpiece; the angle of the rectangular groove matches the width of the groove, and the front V-shaped groove rotating disk ensures that the conveying reference is consistent.

[0020] To prevent the long-span inner and outer shaft assembly from sagging and deforming, a lead screw support assembly is provided below it; the lead screw support assembly includes a pair of support lead screws located directly below the inner and outer shaft assembly. The lead screws (702) of the pair of support lead screws are both embedded in the rectangular groove of the outer rotating shaft and abut against the outer wall of the inner rotating shaft. The pair of support lead screws and the inner and outer shaft assembly form a support structure with an isosceles triangle cross section, which rotates with the inner and outer shafts, providing stable support without interfering with normal movement.

[0021] The stop bar is arranged along one side of the inner and outer shaft assembly to prevent the workpiece from being thrown out under the action of rotation; the stop bar has a chamfering notch at the chamfering station to allow the chamfering grinding wheel to extend in for processing.

[0022] The second workpiece clamping assembly is located above the inner and outer shaft material transfer mechanism, with one set on each side. It includes a clamping bar, a clamping bar elastic component, a clamping bar bracket, a clamping plate, a clamping bar shaft, a spring shaft, and a clamping bar spring. Under the action of the spring force, the clamping bar flexibly presses the top of the workpiece, providing stable friction and ensuring that the workpiece rotates evenly, feeds smoothly, and does not jump or deviate.

[0023] Furthermore, the end face chamfering mechanism is symmetrically arranged on the left and right sides of the inner and outer shaft material transfer mechanism. Each group includes an end face chamfering shaft, a chamfering grinding wheel, an end face chamfering shaft support, an end face chamfering first slide assembly, an end face chamfering support, and an end face chamfering second slide assembly.

[0024] The chamfering grinding wheel is mounted at the front end of the chamfering spindle and is driven to rotate at high speed by a power spindle. The chamfering spindle support is mounted on an inclined first slide assembly, enabling adjustment of the chamfer bevel width. The first slide is fixed to the end face chamfering support, and the bottom of the support is connected to a horizontal second slide assembly, enabling the chamfering grinding wheel to advance and retract and adjust its angle. Through the cooperation of the two slides, the chamfering angle and bevel width can be steplessly adjusted within a set range, adapting to various processing requirements.

[0025] Furthermore, the discharge mechanism is an inclined chute structure, and the chamfered workpiece slides down the chute in an orderly manner under its own weight for discharge.

[0026] Furthermore, the right side of the system is entirely mounted on the right translation slide assembly. The slide is a lead screw slide, which can adjust the distance between the left and right mechanisms to accommodate workpieces of different lengths and specifications.

[0027] Furthermore, guide rings are symmetrically arranged on the left and right sides of the V-groove rotary disk discharge side. The guide rings are matched with the curvature of the rotary disk, and guide plates are provided at the tail end to accurately guide the ground workpiece into the inner and outer shaft transfer mechanism, avoiding material accumulation and jamming.

[0028] Workflow: 1. Loading: The workpiece is placed into the material box of the loading mechanism and automatically enters the V-shaped workpiece groove of the V-shaped groove rotary disk through the loading channel along the guide slope.

[0029] 2. Indexing and conveying: The V-groove rotary table driven by the turntable servo motor rotates in an indexing manner to send the workpiece into the grinding station.

[0030] 3. End face grinding: The belt clamping assembly clamps the workpiece, and the grinding wheels on both ends are fed under the drive of the slide table to grind both ends simultaneously, correcting the flatness, perpendicularity and overall length.

[0031] 4. Material transfer: After grinding is completed, the turntable continues to rotate, and the workpiece falls into the inner and outer shaft transfer mechanism under the guidance of the guide ring.

[0032] The present invention provides a CNC grinding system for round bar materials, which achieves precise centering and indexing of workpieces through a turntable feeding mechanism, achieves synchronous precision grinding of both ends of the workpiece through a symmetrically arranged end face grinding mechanism, achieves independent control of workpiece rotation and axial feed through an inner and outer shaft nested transmission structure, and achieves stepless adjustment of chamfering parameters through a chamfering mechanism with double slides. This system effectively improves the processing accuracy and consistency of round bar workpieces, realizes fully automated continuous processing, and greatly improves processing stability and adaptability. Attached Figure Description

[0033] Figure 1 This is a first-view structural schematic diagram of a CNC grinding system for round bar materials according to the present invention; Figure 2 This is a second-view structural schematic diagram of a CNC grinding system for round bar materials according to the present invention; Figure 3 This is a third-view structural schematic diagram of a CNC grinding system for round bar materials according to the present invention; Figure 4 This is a cross-sectional view of a CNC grinding system for round bar materials according to the present invention; Figure 5 This is a first-view schematic diagram of the connection between the turntable material feeding mechanism and the end face grinding mechanism in a CNC grinding system for round bar materials according to the present invention. Figure 6 This is a second-view schematic diagram showing the connection between the turntable material feeding mechanism and the end face grinding mechanism in a CNC grinding system for round bar materials according to the present invention. Figure 7 This is a first-view schematic diagram of the connection between the inner and outer shaft material transfer mechanism and the end face chamfering mechanism in a CNC grinding system for round bar materials according to the present invention. Figure 8 This is a second-view schematic diagram showing the connection between the inner and outer shaft material transfer mechanism and the end face chamfering mechanism in a CNC grinding system for round bar materials according to the present invention. Figure 9 This is a schematic diagram of the structure of a V-groove rotary disk in a CNC grinding system for round bar materials according to the present invention; Figure 10 This is a first-view schematic diagram of the connection between the V-groove rotary disk and the first workpiece clamping assembly in a CNC grinding system for round bar materials according to the present invention. Figure 11 This is a second-view schematic diagram of the connection between the V-groove rotary disk and the first workpiece clamping assembly in a CNC grinding system for round bar materials according to the present invention. Figure 12 This is a first-view structural diagram of the inner and outer shaft components in a CNC grinding system for round bar materials according to the present invention; Figure 13 This is a second-view structural diagram of the inner and outer shaft components in a CNC grinding system for round bar materials according to the present invention; Figure 14 This is a schematic diagram of the structure of the inner rotating shaft in a CNC grinding system for round bar materials according to the present invention; Figure 15 This is a schematic diagram of the structure of the outer rotating shaft in a CNC grinding system for round bar materials according to the present invention; Figure 16 This is a schematic diagram of the lead screw support assembly acting on the inner and outer shaft assemblies in a CNC grinding system for round bar materials according to the present invention.

[0034] Illustration markings: 1-Turntable feeding mechanism, 101-V-groove rotary table, 102-Grinding station, 103-First workpiece pressing assembly, 104-V-groove of workpiece, 105-Turntable support base, 106-Turntable support plate, 107-End face grinding mechanism mounting position, 108-Grinding wheel through groove, 109-Turntable servo motor, 110-Turntable plug-in post, 111-Plug-in post support, 112-Plug-in post guide groove, 113-Plug-in post guide block, 1 14-Roller assembly, 115-Roller shaft, 116-First roller, 117-Second roller, 118-Third roller, 119-Fourth roller, 120-Belt, 121-Roller tensioning mechanism, 122-Tightening block groove, 123-Roller shaft slider, 124-Tightening screw, 125-Workpiece left end face retaining ring, 126-Workpiece right end face retaining ring, 127-Spring shaft, 128-Retaining ring notch, 129-Chamfered notch; 2-Feeding mechanism, 201-Left box, 202-Right box, 203-Guide slope, 204-Material box, 205-Feeding channel; 3-End face grinding mechanism, 301-End face grinding shaft, 302-End face grinding wheel, 303-End face grinding slide assembly, 304-End face grinding shaft support; 4-Inner and outer shaft material transfer mechanism, 401-Left end face chamfering station, 402-Right end face chamfering station, 403-Second workpiece pressing assembly, 404-Inner and outer shaft assembly, 405-Inner rotating shaft, 406-Outer rotating shaft, 407-Inner rotating servo motor, 408-Rear support of rotating shaft, 409-Outer rotating servo motor, 410-Front support of rotating shaft, 411-Rectangular groove, 412-Pressure bar, 413-Pressure bar elastic assembly, 414-Pressure bar bracket, 415-Pressure plate, 416-Pressure bar shaft, 417-Spring shaft, 418-Pressure bar spring; 5-End face chamfering mechanism, 501-End face chamfering shaft, 502-Chamfering grinding wheel, 503-End face chamfering shaft support, 504-End face chamfering first slide assembly, 505-End face chamfering support, 506-End face chamfering second slide assembly, 507-Sticker strip; 6-Discharge mechanism; 7-Screw support assembly, 701-Screw support, 702-Screw rod, 703-Screw rod support; 8-Right translation slide assembly; 9-Guide ring, 901-Guide plate; 10-Workpiece. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1-4 As shown, this solution provides a CNC grinding system for round bar materials. It is a horizontal CNC machining structure. The turntable feeding mechanism 1 serves as the front-end feeding and indexing core. Its feeding end is fixedly connected to the feeding mechanism 2, and the end face grinding mechanisms 3 are symmetrically installed on the left and right sides. The discharge end of the turntable feeding mechanism 1 is connected to the inner and outer shaft transmission mechanism 4. The end face chamfering mechanism 5 is symmetrically arranged on the left and right sides of the inner and outer shaft transmission mechanism 4, and the tail end is connected to the discharge mechanism 6. The lead screw support assembly 7 is supported at the bottom of the inner and outer shaft transmission mechanism 4. The right translation slide assembly 8 carries all the components on the right side of the system to achieve length adaptation and adjustment. The guide ring 9 is connected between the turntable feeding mechanism 1 and the inner and outer shaft transmission mechanism 4 to achieve precise transfer of workpieces.

[0037] The specific implementation structure of the turntable material stacking mechanism 1 in this embodiment is as follows: like Figure 5 , Figure 6 , Figure 10 and Figure 11 As shown, the turntable support base 105 is fixedly installed on the equipment base, and the turntable support plate 106 is vertically fixed on top. The two turntable support plates 106 on the left and right are arranged in parallel to provide an installation reference for the V-groove turntable 101 and the end face grinding mechanism 3.

[0038] The turntable servo motor 109 is fixed on the outside of the left turntable support plate 106. Its output shaft passes through the turntable support plate 106 and is coaxially fixed to the turntable plug 110. The other end of the turntable plug 110 passes through the right turntable support plate 106 and is rotatably connected to the plug support 111 through a bearing, so that the turntable plug 110 can rotate smoothly under the drive of the servo motor.

[0039] like Figure 9 As shown, the center hole of the V-groove rotary disk 101 is sleeved on the outside of the turntable insertion post 110. The outer wall of the turntable insertion post 110 is provided with an insertion post guide groove 112. The inner hole of the V-groove rotary disk 101 is provided with an insertion post guide block 113. The guide block and the guide groove are fitted together, so that the V-groove rotary disk 101 and the turntable insertion post 110 form a circumferentially limited and axially detachable connection relationship, realizing the quick replacement of V-groove rotary disks 101 with different groove widths to adapt to workpieces 10 with different diameters.

[0040] V-shaped workpiece grooves 104 are evenly distributed on the outer periphery of the V-groove rotary disk 101. After the workpiece 10 falls into the groove, it is automatically centered by the V-shaped surface to ensure that the machining allowance at both ends is consistent.

[0041] The left and right turntable support plates 106 respectively fix the left end face retaining ring 125 of the workpiece and the right end face retaining ring 126 of the workpiece. The right end face retaining ring 126 is fixed to multiple spring shafts 127. The spring shafts 127 pass through the right turntable support plate 106 and are fitted with springs, so that the right end face retaining ring 126 can float elastically along the axial direction to compensate for the length error of the workpiece 10 and ensure axial positioning stability during grinding. A retaining ring notch 128 is opened at the grinding station 102 to provide processing clearance space for the end face grinding wheel 302.

[0042] The first workpiece pressing assembly 103 is symmetrically installed on the left and right turntable support plates 106. The roller shaft 115 rotatably connects the first roller 116, the second roller 117, the third roller 118, and the fourth roller 119 to the turntable support plate 106. The belt 120 is wrapped around the outside of the four rollers and fits against the arc surface of the V-groove turntable 101, flexibly pressing the workpiece 10 into the V-shaped workpiece groove 104 to prevent the workpiece 10 from moving or falling out during rotation indexing and end face grinding.

[0043] In the roller tensioning mechanism 121, the tensioning block groove 122 is opened on the turntable support plate 106, the roller shaft slider 123 is slidably installed in the groove, and the tensioning screw 124 passes through the groove wall and is threadedly connected to the roller shaft slider 123. By rotating the tensioning screw 124, the third roller 118 can be driven to move horizontally, thereby adjusting the tension of the belt 120 and ensuring a stable and reliable clamping effect.

[0044] The specific implementation structure of the feeding mechanism 2 in this embodiment is as follows: like Figures 2-6As shown, the left box 201 and right box 202 of the feeding mechanism 2 are respectively fixed to the front end of the left and right turntable support plates 106, and the two are spliced ​​together to form a material box 204. The material box 204 is provided with a guide slope 203, and a feeding channel 205 is opened on the side facing the V-shaped groove turntable 101. After the workpiece 10 is put into the material box 204, it rolls along the guide slope 203 under its own gravity and enters the V-shaped workpiece groove 104 one by one through the feeding channel 205, so as to realize continuous automatic feeding.

[0045] The specific implementation structure of the end face grinding mechanism 3 in this embodiment is as follows: like Figures 2-6 As shown, the end face grinding mechanism 3 is symmetrically arranged on the left and right sides of the V-groove rotary disk 101. The end face grinding slide assembly 303 is fixed on the end face grinding mechanism mounting position 107 of the rotary disk support plate 106. The end face grinding shaft support 304 is installed on the moving platform of the slide. The end face grinding shaft 301 is rotatably supported by the shaft support 304 and is driven to rotate by power. The end face grinding wheel 302 is fixed at the front end.

[0046] The grinding wheels 302 on both ends are arranged in an inclined V-shape. Driven by the end face grinding slide assembly 303, they achieve horizontal feeding and simultaneously grind both ends of the workpiece 10. The turntable support plate 106 has a grinding wheel through groove 108, which allows the end face grinding wheel 302 to extend into the end face of the workpiece 10 to complete the correction of flatness, perpendicularity and overall length.

[0047] The specific implementation structure of the inner and outer shaft material transfer mechanism 4 in this embodiment is as follows: like Figure 4 , Figure 6 , Figures 12-15 As shown, the inner and outer shaft material transfer mechanism 4 is used to receive the workpiece 10 after grinding and realize the combined motion of rotation and feed. The inner and outer shaft assemblies 404 arranged symmetrically on the left and right are the core execution components.

[0048] The inner rotating shaft 405 is a solid optical shaft, with its front end coaxially fixed to the output shaft of the inner rotating servo motor 407, and its rear end rotatably connected to the rear support 408 of the rotating shaft; the outer rotating shaft 406 is a hollow rectangular shaft, coaxially sleeved outside the inner rotating shaft 405, and the inner and outer shafts are supported by bearings to form a nested structure that can rotate relative to each other.

[0049] The external rotary servo motor 409 is fixed to the rear support 408 of the rotating shaft. Its output shaft is fixed to the rear end of the external rotary shaft 406, and its front end is rotatably connected to the front support 410 of the rotating shaft, so that the inner rotary shaft 405 and the outer rotary shaft 406 can be driven independently by their respective servo motors to achieve rotation in the same direction but at different speeds.

[0050] The outer wall of the outer rotating shaft 406 has a spirally connected rectangular groove 411. The bottom of the workpiece 10 is supported by the inner rotating shaft 405 and driven to rotate at high speed. The side of the workpiece 10 contacts the inner wall of the rectangular groove 411 and is pushed forward at low speed, so that the rotational chamfering and axial feed can be achieved at the same station.

[0051] like Figure 8 As shown, the stop bar 507 is arranged along the outer side of the inner and outer shaft assembly 404 to prevent the workpiece 10 from being thrown out during rotation. The stop bar 507 has a chamfer notch 129 at the chamfer position to provide processing space for the chamfering grinding wheel 502.

[0052] like Figure 7 and 8 As shown, the second workpiece pressing assembly 403 is located above the inner and outer shaft assemblies 404. The pressing strip bracket 414 is fixed to the frame, and the pressing plate 415 is fixed to the upper part of the bracket. The pressing strip shaft 416 passes through the pressing plate 415 and is fixed to the pressing strip 412 below. The spring shaft 417 is symmetrically arranged on both sides of the pressing strip shaft 416 and is fixed to the pressing strip 412. The spring shaft 417 passes through the pressing plate 415 and is fitted with a pressing strip spring 418. The pressing strip spring 418 provides downward elastic pressure, so that the pressing strip 412 flexibly presses the top of the workpiece 10, provides stable friction, and ensures that the workpiece 10 rotates evenly, feeds smoothly, and does not jump or deviate.

[0053] The specific implementation structure of the lead screw support assembly 7 in this embodiment is as follows: like Figure 4 and Figure 16 As shown, to prevent the long-span inner and outer shaft assembly 404 from sagging and deforming, a lead screw support assembly 7 is provided below it; the lead screw support assembly 7 includes a pair of support lead screws 701 located directly below the inner and outer shaft assembly 404, and a lead screw support 703 fixed to the frame. The two ends of the pair of support lead screws 701 are respectively movably connected to the lead screw support 703 through lead screw bearings; the lead screws 702 of the pair of support lead screws 701 are all embedded in the rectangular grooves 411 of the outer rotating shaft 406 and connected to the inner rotating shaft 405. The outer wall abuts against the inner and outer shaft assemblies 404, which together form a support structure with an isosceles triangle cross section. The angle where the inner and outer shaft assemblies 404 are located is the vertex angle. The included angle between the two support screws 701 and the inner and outer shaft assemblies 404 is 60° to 90°. The pair of support screws 701 rotate passively with the rotation of the inner and outer shafts, which not only provides stable support for the inner and outer shaft assemblies 404, but also does not interfere with their normal rotation, effectively improving the running accuracy and stability under long shaft conditions.

[0054] The specific implementation structure of the end face chamfering mechanism 5 in this embodiment is as follows: like Figure 2 , Figure 3 , Figure 7As shown, the end face chamfering mechanism 5 is symmetrically arranged on the left and right sides of the inner and outer shaft material transfer mechanism 4. The end face chamfering second slide assembly 506 is horizontally installed on the frame. The end face chamfering support 505 is fixed to the moving platform of the second slide. The end face chamfering first slide assembly 504 is inclinedly installed on the end face chamfering support 505. The end face chamfering rotating shaft support 503 is fixed to the moving platform of the first slide. The end face chamfering rotating shaft 501 is rotatably supported on the rotating shaft support 503 and driven by power. The front end is equipped with a chamfering grinding wheel 502.

[0055] The chamfering grinding wheel 502 is moved horizontally by the second slide assembly 506 for end face chamfering, and the chamfering grinding wheel 502 is fed along the inclined direction by the first slide assembly 504 for end face chamfering. The two work together to steplessly adjust the chamfering angle and chamfering width to meet different processing requirements.

[0056] like Figure 2 and Figure 3 As shown, in this embodiment, the discharge mechanism 6 is an inclined chute structure, which is fixedly installed at the tail end of the inner and outer shaft material transfer mechanism 4. The chamfered workpiece 10 slides down the chute in an orderly manner under its own weight, realizing automatic discharge and collection.

[0057] like Figure 2 , Figure 3 , Figure 7 As shown, in this embodiment, the right translation slide assembly 8 is installed on the right side of the equipment base. The turntable support plate 106, end face grinding mechanism 3, inner and outer shaft assembly 404, and end face chamfering mechanism 5 on the right side of the system are all fixed to the moving platform of the right translation slide assembly 8. The distance between the left and right side mechanisms can be adjusted by moving the slide to adapt to workpieces 10 of different lengths.

[0058] like Figure 4 As shown, in this embodiment, the guide ring 9 is symmetrically arranged on the left and right sides of the discharge side of the V-groove rotary disk 101. The inner wall of the guide ring 9 fits the outer arc of the V-groove rotary disk 101, and the tail is provided with a guide plate 901 to accurately guide the ground workpiece 10 into the inner and outer shaft assembly 404, so as to avoid the workpiece 10 from shifting, jamming or piling up, and to ensure smooth material transfer.

[0059] The system operates continuously in six stages: loading, indexing conveying, end face grinding, material transfer, chamfering, and unloading. First, the workpiece automatically enters the V-shaped workpiece groove 104 of the V-groove rotary table 101 via the material box 204 and guide ramp 203 of the loading mechanism 2. The rotary table servo motor 109 drives the V-groove rotary table 101 to rotate, sending the workpiece to the grinding station 102. At this time, the belt 120 of the first workpiece pressing assembly 103 flexibly presses the workpiece. The end face grinding wheels 302 of the two end face grinding mechanisms 3 are fed under the drive of the end face grinding slide assembly 303, simultaneously grinding both ends of the workpiece to correct flatness, perpendicularity, and overall length. After grinding, the V-groove rotary table 101... As the rotation continues, the workpiece, guided by the guide ring 9 and the guide plate 901, falls onto the inner and outer shaft assembly 404 of the inner and outer shaft transfer mechanism 4. The pressure bar 412 of the second workpiece pressing assembly 403 flexibly presses the top of the workpiece. The inner rotary servo motor 407 drives the inner rotary shaft 405 to rotate at high speed, causing the workpiece to rotate. The outer rotary servo motor 409 drives the outer rotary shaft 406 to rotate at low speed, pushing the workpiece to feed along the axial direction. The workpiece passes through the two end face chamfering mechanisms 5 in sequence. The chamfering grinding wheel 502 completes the chamfering at both ends with the cooperation of the end face chamfering first slide assembly 504 and the end face chamfering second slide assembly 506. Finally, the processed workpiece automatically slides down the inclined slide of the discharge mechanism 6 to achieve orderly discharge.

[0060] In this embodiment, the width of the V-shaped workpiece groove 104 of the V-groove rotary disk 101 is matched and set according to the diameter of the workpiece 10 being processed, and is suitable for round bars with diameters of φ4mm–φ30mm; the V-shaped included angle of the end face grinding wheels 302 is set to 1° to 5° to ensure that the end face is ground flat and has high perpendicularity; the tilt angle of the end face chamfering first slide assembly 504 is set to 45°, and the chamfering angle can be continuously adjusted within the range of 10° to 170°.

[0061] The inner rotary servo motor 407 drives the inner rotary shaft 405 at a speed of 200 r / min to 800 r / min, and the outer rotary servo motor 409 drives the outer rotary shaft 406 at a speed of 3 r / min to 30 r / min. Stable rotational machining and uniform feed are achieved through the speed ratio.

[0062] The retaining ring 126 on the right end face of the workpiece can compensate for length errors within ±1mm, ensuring that the length of the batch of workpieces 10 is consistent after grinding; both the first workpiece pressing assembly 103 and the second workpiece pressing assembly 403 adopt flexible pressing to avoid damaging the workpiece surface, while ensuring that there is no movement during processing.

[0063] After processing by this system, the flatness of the workpiece end face is ≤0.02mm, the perpendicularity of the end face is ≤0.03mm, and the chamfer angle error is ≤±0.5°. It can realize fully automatic continuous processing, significantly improving the processing accuracy, consistency and production efficiency of grinding and chamfering of the two end faces of round bar workpieces.

[0064] The above description is merely illustrative of the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, 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 numerical control lapping system for round bar-like materials, characterized by, It includes a turntable feeding mechanism (1), a feeding mechanism (2), an end face grinding mechanism (3), an inner and outer shaft material transfer mechanism (4), an end face chamfering mechanism (5), and a discharge mechanism (6). The turntable feeding mechanism (1) includes a V-groove turntable (101), a turntable support base (105), a turntable support plate (106), a turntable servo motor (109), a turntable insertion post (110), and a first workpiece pressing assembly (103); the V-groove turntable (101) is uniformly provided with a plurality of V-shaped workpiece grooves (104) in the circumference, which are used to receive and position round bar-shaped workpieces (10); the V-groove turntable (101) is sleeved on the turntable insertion post (110) and driven to rotate by the turntable servo motor (109); The feeding mechanism (2) is located at the feeding end of the turntable feeding mechanism (1) and is used to feed materials one by one to the V-groove rotary disk (101); The end face grinding mechanism (3) is symmetrically arranged on the left and right sides of the V-groove rotary disk (101), including an end face grinding shaft (301), an end face grinding wheel (302) and an end face grinding slide assembly (303); the two end face grinding wheels (302) are arranged in an inclined V-shape for synchronous grinding of the two end faces of the workpiece (10); The inner and outer shaft material transfer mechanism (4) is located at the discharge end of the turntable material feeding mechanism (1), and includes left and right symmetrical inner and outer shaft assemblies (404), a second workpiece pressing assembly (403) and a stop bar (507); the inner and outer shaft assembly (404) includes a nested structure of a solid inner rotating shaft (405) and a hollow rectangular outer rotating shaft (406), and is driven by an independent servo motor to realize the rotation and axial feeding of the workpiece (10); The end face chamfering mechanism (5) is symmetrically arranged on the left and right sides of the inner and outer shaft material transfer mechanism (4), including a chamfering grinding wheel (502), an end face chamfering first slide assembly (504) and an end face chamfering second slide assembly (506); the end face chamfering first slide assembly (504) is inclined relative to the horizontal direction, and works with the end face chamfering second slide assembly (506) to realize stepless adjustment of chamfering angle and width.

2. The numerical control lapping system for round bar-like material according to claim 1, wherein The outer wall of the turntable plug-in post (110) is provided with several plug-in post guide grooves (112), and the inner hole of the V-groove turntable (101) is provided with plug-in post guide blocks (113) that are adapted to the guide grooves (112), so as to realize the quick replacement and circumferential limit of the V-groove turntable (101).

3. The CNC grinding system for round bar materials according to claim 1, characterized in that, The first workpiece pressing assembly (103) includes a left-right symmetrical roller assembly (114), a belt (120), and a roller tensioning mechanism (121); the roller assembly (114) includes a first roller (116), a second roller (117), a third roller (118), and a fourth roller (119); the belt (120) is set to fit the arc surface of the V-groove rotating disk (101) to achieve flexible pressing of the workpiece (10); the roller tensioning mechanism (121) includes a tensioning block groove (122), a roller shaft slider (123), and a tensioning screw (124) for adjusting the tension of the belt (120).

4. The CNC grinding system for round bar materials according to claim 1, characterized in that, The turntable support plate (106) is provided with a workpiece left end face retaining ring (125) and a workpiece right end face retaining ring (126) on the inner side; the right end face retaining ring (126) is elastically connected to the spring through the spring shaft (127) to compensate for the length error of the workpiece (10); the retaining ring is provided with a retaining ring notch (128) corresponding to the grinding station (102) for the end face grinding wheel (302) to extend into.

5. A CNC grinding system for round bar materials according to claim 1, characterized in that, The feeding mechanism (2) includes a left box (201), a right box (202) and a material box (204) formed by splicing; the material box (204) is provided with a guide slope (203) and a feeding channel (205), and the workpiece (10) automatically enters the V-shaped workpiece groove (104) under the action of gravity.

6. A CNC grinding system for round bar materials according to claim 1, characterized in that, The inner rotating shaft (405) is connected to the inner rotating servo motor (407) to drive the workpiece (10) to rotate at high speed; the outer rotating shaft (406) is connected to the outer rotating servo motor (409) to drive the workpiece (10) to move forward at low speed; the inner and outer shafts rotate in the same direction but at different speeds, so that the workpiece (10) rotates and feeds synchronously.

7. A CNC grinding system for round bar materials according to claim 6, characterized in that, Below the inner and outer shaft assembly (404) is a lead screw support assembly (7); the lead screw support assembly (7) includes a pair of support lead screws (701) located directly below the inner and outer shaft assembly (404). The lead screw (702) of the support lead screw (701) is embedded in the rectangular groove (411) of the outer rotating shaft (406) and abuts against the inner rotating shaft (405). The pair of support lead screws (701) and the inner and outer shaft assembly (404) form a support structure with an isosceles triangle cross section, which is used to support and prevent sagging.

8. A CNC grinding system for round bar materials according to claim 1, characterized in that, There are two second workpiece pressing assemblies (403), which are arranged along the left and right sides of the inner and outer shaft material transfer mechanism (4). One assembly includes a pressing strip (412) located above the second workpiece pressing assembly (403). The front and rear ends of the pressing strip (412) are movably connected by a pressing strip elastic assembly (413). The pressing strip elastic assembly (413) includes a pressing strip bracket (414), on which a pressing plate (415) parallel to the pressing strip (412) is arranged. The pressing strip shaft (41... 6) After passing through the pressure plate (415), it is movably connected to the pressure strip (412); the two sides of the pressure strip shaft (416) are symmetrically provided with spring shafts (417) that are perpendicularly connected to the pressure strip (412). The two spring shafts (417) can pass through the pressure plate (415), and pressure strip springs (418) are sleeved on the spring shafts (417) to realize the pressure strip (412) to limit the pressing of each workpiece (10) transmitted on the inner and outer shaft material transfer mechanism (4).

9. A CNC grinding system for round bar materials according to claim 1, characterized in that, The system is provided with a right translation slide assembly (8) on the right side, which is used to adjust the distance between the left and right mechanisms to adapt to workpieces (10) of different lengths; the V-groove rotary disk (101) is provided with a guide ring (9) and a guide plate (901) on the discharge side, so as to accurately guide the workpiece (10) to the inner and outer shaft material transfer mechanism (4).

10. A CNC grinding system for round bar materials according to claim 1, characterized in that, The V-shaped included angle between the two end face grinding wheels (302) is set to 1° to 5°; the tilt angle of the first slide assembly (504) of the end face chamfering relative to the horizontal direction is 45°; and the end face chamfering mechanism (5) can realize continuous adjustment of the chamfering angle within the range of 10° to 170°.

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