A tooling fixture for a double-sided grinder
Patent Information
- Application Number
- CN202521945235.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-09-10
AI Technical Summary
[0003]当前应用于此类双面磨削的夹具技术，主要依赖顶针固定或三爪卡盘夹持等方式，这些方法的核心思路是通过夹紧工件的两端来实现定位和固定，以便磨床的两个砂轮能同时对轴两端的边缘区域进行同步磨削，然而，这类夹具存在一定的缺陷：首先，它们对工件的结构有严格要求，必须依赖轴两端完整的中心孔或规则圆柱面作为夹持基准，若工件两端不具备或无法提供高精度的、与夹具完美吻合的基准特征，则难以实现有效、可靠的定位与夹持，其次，为了实现精准装夹，通常需要额外的预定位步骤，无论是依赖人工手动找正还是借助复杂的机械手辅助定位，都显著增加了操作的复杂度和时间成本，导致生产效率降低且人力/设备投入高昂，最关键的是，这种依赖两端基准的定位方式以及预定位环节本身，极易引入装夹误差，使得最终的双面磨削精度难以得到稳定保障，影响产品质量一致性
该用于双面磨床的工装夹具，通过设置的托举组件与夹具架的位移联动设置，可以方便在工件被夹紧前对工件进行托举预定位，便于工件端部与夹具吻合，精度高，而且在夹紧时可与工件分离，避免影响工件旋转，结构紧凑，使用方便，提高了效率，调节组件的设置可以方便调节工件高度，以便于适应不同的工件，增加适应性。
Smart Images
Figure CN224659115U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor shaft machining technology, and in particular to a tooling fixture for a double-sided grinder. Background Technology
[0002] As a core component for power transmission, the motor shaft typically requires chamfering or rounding at both ends. This process is crucial, firstly to remove sharp edges and burrs, preventing scratches to mating parts or operators during assembly and improving safety and assembly smoothness; secondly, to create precise guide fillets or chamfers, effectively reducing stress concentration, improving shaft fatigue strength and service life, and ensuring that precision components such as bearings can be installed more accurately and without damage. Using a double-sided grinder to simultaneously grind both ends not only significantly increases efficiency compared to single-sided multi-stage processing, but more importantly, it strictly guarantees the symmetry, dimensional consistency, and fillet / chamfer quality of the grinding features on both sides, avoiding reference errors caused by two clamping operations. This is particularly critical for ensuring the dynamic balance performance and overall assembly accuracy of the motor shaft.
[0003] Current fixture technologies used in this type of double-sided grinding mainly rely on methods such as ejector pin fixing or three-jaw chuck clamping. The core idea of these methods is to achieve positioning and fixation by clamping both ends of the workpiece, so that the two grinding wheels of the grinding machine can simultaneously grind the edge areas at both ends of the shaft. However, these fixtures have certain drawbacks: First, they have strict requirements on the structure of the workpiece, and must rely on the complete center holes or regular cylindrical surfaces at both ends of the shaft as clamping references. If the two ends of the workpiece do not have or cannot provide high-precision reference features that perfectly match the fixture, it is difficult to achieve effective and reliable positioning and clamping. Second, in order to achieve precise clamping, additional pre-positioning steps are usually required. Whether relying on manual alignment or using complex robotic arms for positioning, it significantly increases the complexity and time cost of operation, resulting in reduced production efficiency and high investment in manpower / equipment. Most importantly, this positioning method that relies on the references at both ends and the pre-positioning step itself are very prone to introducing clamping errors, making it difficult to guarantee the final double-sided grinding accuracy and affecting the consistency of product quality.
[0004] Therefore, it is necessary to propose a tooling fixture for double-sided grinding machines to solve the above problems. Utility Model Content
[0005] The main objective of this invention is to provide a tooling fixture for a double-sided grinding machine, which can effectively solve the problems in the background art.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A tooling fixture for a double-sided grinding machine includes a base, a clamping assembly at the upper end of the base, the clamping assembly including a fixture frame movably disposed at the top end of the base, a fixture rotatably disposed on one side of the upper end of the fixture frame, a second drive source for driving the fixture to rotate is disposed on one side of the upper end of one of the fixture frames, and a first drive source for driving the fixture frame to move at the upper end of the fixture frame. It also includes a lifting assembly, which includes a lifting seat disposed on the upper end of the base and located between two fixture frames. The upper end of the base is provided with a lifting groove adapted to the lifting seat. The lifting seat is vertically and movably connected to the inner side of the lifting groove, and the upper end of the lifting seat protrudes from the top of the base. The upper end of the lifting seat is detachably provided with a workpiece bracket adapted to the workpiece. The side wall of the lifting seat is provided with a straight guide groove. The end of the straight guide groove away from the fixture frame is provided with an inclined guide groove. One side of the fixture frame is provided with a drive arm located at the edge of the lifting seat. One end of the drive arm is provided with a first guide rod for movably guiding and cooperating with the inclined guide groove and the straight guide groove. The side of the fixture frame near the first drive source is provided with a pusher seat. The output shaft of the first drive source is connected to the side wall of the pusher seat, and an elastic element is provided between the pusher seat and the fixture frame.
[0007] Preferably, the clamp is a pin or a three-jaw chuck.
[0008] Preferably, linear guide rails are symmetrically arranged at both ends of the top of the base, and the bottom of the fixture frame is movably connected to the linear guide rails.
[0009] Preferably, the inner wall of the straight guide groove and the inner wall of the inclined guide groove are smoothly transitioned, and the inclined guide groove is configured such that when the drive arm drives the first guide rod to move in the direction of another fixture frame, the workpiece bracket moves downward.
[0010] Preferably, the side wall of the fixture frame is provided with a second guide rod corresponding to the push seat, and the push seat is movably sleeved on the outside of the second guide rod; The elastic element is a spring, and the spring is sleeved on the outside of the second guide rod.
[0011] Preferably, an adjustment assembly is provided between the workpiece bracket and the lifting seat. The adjustment assembly includes an adjustment plate disposed on the top of the lifting seat, an adjustment groove disposed on the top of the adjustment plate, an adjustment seat corresponding to the adjustment groove disposed on the bottom of the workpiece bracket, and the lower end of the adjustment seat is movably connected to the inner side of the adjustment groove. Traction arms are symmetrically and movably disposed at both ends of the bottom of the adjustment seat. A double-acting screw is rotatably disposed at the lower end of the inner side of the adjustment groove. One end of the double-acting screw extends to the outside of the adjustment plate and is provided with a screwing mechanism. Moving blocks are symmetrically threaded to the outer sides of both ends of the double-acting screw. The lower end of the traction arm is movably connected to the moving block.
[0012] Compared with the prior art, this utility model provides a tooling fixture for a double-sided grinding machine, which has the following beneficial effects: This tooling fixture for a double-sided grinder, through the linkage between the lifting component and the fixture frame, can conveniently lift and pre-position the workpiece before it is clamped, facilitating the fit between the workpiece end and the fixture with high precision. Moreover, it can be separated from the workpiece during clamping to avoid affecting the workpiece rotation. The fixture has a compact structure, is easy to use, and improves efficiency. The adjustment component allows for easy adjustment of the workpiece height to accommodate different workpieces and increase adaptability. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural diagram of the present invention in its disassembled state; Figure 3 This is a structural diagram of the adjusting plate and adjusting seat of this utility model in their disassembled state; Figure 4 This is a structural schematic diagram of one of the clamp frames of this utility model.
[0014] In the diagram: 1. Base; 2. Fixture frame; 3. Fixture; 4. Workpiece support; 5. Drive arm; 6. First drive source; 7. Adjusting plate; 8. Adjusting seat; 9. Linear guide rail; 10. Lifting groove; 11. Lifting seat; 12. First guide rod; 13. Adjusting groove; 14. Tightening; 15. Two-way lead screw; 16. Moving block; 17. Traction arm; 18. Inclined guide groove; 19. Pushing seat; 20. Second guide rod; 21. Elastic element; 22. Straight guide groove; 23. Second drive source. Detailed Implementation
[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0016] like Figure 1-4 As shown, a tooling fixture for a double-sided grinder includes a base 1. A clamping assembly is provided on the upper end of the base 1. The clamping assembly includes a fixture frame 2 movably disposed at the top end of the base 1. Specifically, linear guide rails 9 are symmetrically arranged on both ends of the top of the base 1. The bottom of the fixture frame 2 is movably connected to the linear guide rails 9. A fixture 3 is rotatably disposed on one side of the upper end of the fixture frame 2. The fixture 3 is a ejector pin or a three-jaw chuck. Ejector pins and three-jaw chucks are mature technologies and will not be described in detail in this application. A second drive source 23 for driving the fixture 3 to rotate is provided on one side of the upper end of the fixture frame 2. The second drive source 23 is preferably a motor. A first drive source 6 for driving the fixture frame 2 to move is provided at the upper end of the fixture frame 2. The first drive source 6 is preferably a cylinder or a hydraulic cylinder. It also includes a lifting assembly, which includes a lifting seat 11 disposed on the upper end of the base 1 and located between two clamping frames 2. The upper end of the base 1 is provided with a lifting groove 10 adapted to the lifting seat 11. The lifting seat 11 is vertically and movably connected to the inner side of the lifting groove 10, and the upper end of the lifting seat 11 protrudes from the top of the base 1. The upper end of the lifting seat 11 is detachably provided with a workpiece bracket 4 adapted to the workpiece. The side wall of the lifting seat 11 is provided with a straight guide groove 22, and the end of the straight guide groove 22 away from the clamping frame 2 is provided with an inclined guide groove 18. The inner wall of the straight guide groove 22 and the inner wall of the inclined guide groove 18 smoothly transition, and the inclined guide groove 18 is configured such that when the drive arm 5 drives the first guide rod 12 towards the other clamping frame 2... During directional displacement, the workpiece support 4 moves downward. A drive arm 5 located at the edge of the lifting seat 11 is provided on one side of the fixture frame 2. A first guide rod 12 is provided on one end sidewall of the drive arm 5 for movably guiding and cooperating with the inclined guide groove 18 and the straight guide groove 22. A push seat 19 is provided on the side of the fixture frame 2 near the first drive source 6. The output shaft of the first drive source 6 is connected to the sidewall of the push seat 19. An elastic element 21 is provided between the push seat 19 and the fixture frame 2. A second guide rod 20 corresponding to the push seat 19 is provided on the sidewall of the fixture frame 2. The push seat 19 is movably sleeved outside the second guide rod 20. The elastic element 21 is preferably a spring, and the spring is sleeved outside the second guide rod 20.
[0017] In addition, to facilitate adaptation to different workpieces, an adjustment assembly is provided between the workpiece bracket 4 and the lifting seat 11. The adjustment assembly includes an adjustment plate 7 set on the top of the lifting seat 11, an adjustment groove 13 set on the top of the adjustment plate 7, an adjustment seat 8 corresponding to the adjustment groove 13 set on the bottom of the workpiece bracket 4, and the lower end of the adjustment seat 8 is movably connected to the inner side of the adjustment groove 13. Traction arms 17 are symmetrically and movably arranged at both ends of the bottom of the adjustment seat 8. A double-acting screw 15 is rotatably arranged at the lower end of the inner side of the adjustment groove 13. One end of the double-acting screw 15 extends to the outside of the adjustment plate 7 and is provided with a screw 14. Moving blocks 16 are symmetrically threaded to the outer sides of both ends of the double-acting screw 15. The lower end of the traction arm 17 is movably connected to the moving block 16.
[0018] Working principle: Before use, accurately determine the height of the workpiece bracket 4 so that when the workpiece is placed on top of the workpiece bracket 4, both ends of the workpiece can precisely match the fixture 3. Specifically, turning the screw 14 drives the bidirectional lead screw 15 to rotate, which in turn drives the two moving blocks 16 to move closer or further apart. This, through the traction arm 17, achieves the overall raising or lowering of the adjusting seat 8 and the workpiece bracket 4. After adjustment, when processing the workpiece, place the workpiece on top of the workpiece bracket 4. The workpiece bracket 4 is detachable, allowing the installation of different workpiece brackets 4 to accommodate different workpieces. After placing the workpiece, control the first drive source 6 to drive the displacement of the pusher seat 19. The pusher seat 19 pushes the fixture frame through the elastic element 21. 2. As the workpiece is displaced, the fixture 3 gradually approaches the end of the workpiece. After contacting the workpiece, the fixture frame 2 stops, and the push seat 19 continues to displace. The elastic element 21 is compressed, and the reverse force generated by the elastic element 21 acts on the fixture frame 2. The fixture frame 2 then clamps the two ends of the workpiece through the fixture 3, or clamps it through the three-jaw chuck. At the same time as the fixture frame 2 is displaced, it also drives the overall displacement of the drive arm 5 and the first guide rod 12. Before clamping, the first guide rod 12 is displaced inside the straight guide groove 22. After clamping, the first guide rod 12 enters the inclined guide groove 18 from the straight guide groove 22. Then, the lifting seat 11, the adjusting plate 7, the adjusting seat 8, and the workpiece bracket 4 move down as a whole, so that the workpiece bracket 4 is separated from the workpiece, thus avoiding affecting the rotation of the workpiece.
[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A tooling fixture for a double-sided grinder, comprising a base (1), characterized in that: The base (1) is provided with a clamping assembly at its upper end. The clamping assembly includes a clamping frame (2) movably disposed at the top end of the base (1). A clamp (3) is rotatably disposed on one side of the upper end of the clamping frame (2). A second driving source (23) for driving the clamp (3) to rotate is disposed on one side of the upper end of one of the clamping frames (2). A first driving source (6) for driving the clamping frame (2) to move is disposed at the end of the upper end of the clamping frame (2). It also includes a lifting assembly, which includes a lifting seat (11) disposed on the upper end of the base (1) and located between two clamping frames (2). The upper end of the base (1) is provided with a lifting groove (10) adapted to the lifting seat (11). The lifting seat (11) is vertically and movably connected to the inside of the lifting groove (10), and the upper end of the lifting seat (11) protrudes from the top of the base (1). The upper end of the lifting seat (11) is detachably provided with a workpiece bracket (4) adapted to the workpiece. The side wall of the lifting seat (11) is provided with a straight guide groove (22). An inclined guide groove (18) is provided at one end away from the fixture frame (2). A drive arm (5) located at the edge of the lifting seat (11) is provided on one side of the fixture frame (2). A first guide rod (12) is provided on one side wall of the drive arm (5) for moving and guiding with the inclined guide groove (18) and the straight guide groove (22). A push seat (19) is provided on the side of the fixture frame (2) near the first drive source (6). The output shaft of the first drive source (6) is connected to the side wall of the push seat (19), and an elastic element (21) is provided between the push seat (19) and the fixture frame (2).
2. The tooling fixture for a double-sided grinder according to claim 1, characterized in that: The clamp (3) is a pin or a three-jaw chuck.
3. A tooling fixture for a double-sided grinder according to claim 1, characterized in that: The base (1) has linear guide rails (9) symmetrically arranged at both ends of its top edge, and the bottom of the fixture frame (2) is movably connected to the linear guide rails (9).
4. A tooling fixture for a double-sided grinder according to claim 1, characterized in that: The inner wall of the straight guide groove (22) and the inner wall of the inclined guide groove (18) are smoothly connected, and the inclined guide groove (18) is configured such that when the drive arm (5) drives the first guide rod (12) to move in the direction of another fixture frame (2), the workpiece bracket (4) moves downward.
5. A tooling fixture for a double-sided grinder according to claim 1, characterized in that: The side wall of the fixture frame (2) is provided with a second guide rod (20) corresponding to the push seat (19), and the push seat (19) is movably sleeved on the outside of the second guide rod (20); The elastic element (21) is a spring, and the spring is sleeved on the outside of the second guide rod (20).
6. A tooling fixture for a double-sided grinder according to any one of claims 1-5, characterized in that: An adjustment assembly is provided between the workpiece bracket (4) and the lifting seat (11). The adjustment assembly includes an adjustment plate (7) on the top of the lifting seat (11), an adjustment groove (13) on the top of the adjustment plate (7), an adjustment seat (8) corresponding to the adjustment groove (13) on the bottom of the workpiece bracket (4), and the lower end of the adjustment seat (8) is movably connected to the inner side of the adjustment groove (13). Traction arms (17) are symmetrically and movably arranged at both ends of the bottom of the adjustment seat (8). A double-acting screw (15) is rotatably arranged at the lower end of the inner side of the adjustment groove (13). One end of the double-acting screw (15) extends to the outside of the adjustment plate (7) and is provided with a screw (14). Moving blocks (16) are symmetrically threaded to the outer sides of both ends of the double-acting screw (15). The lower end of the traction arm (17) is movably connected to the moving block (16).