Shaft outer circle grinding clamping tool
Patent Information
- Application Number
- CN202521786917.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-21
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-08-21
AI Technical Summary
因鸡心夹头安装在转轴外圆圆周上，砂轮磨削此处外圆时会与鸡心夹头发生干涉，从而无法对该处外圆面进行磨削，使该类型高精度电机转轴的外圆磨削加工无法在一次定位装夹中完成，需要进行二次装夹，分段加工
本实用新型的转轴外圆磨削夹持工装，将主动组件装在台架拨盘上，将从动组件装在芯轴的端面螺纹孔上，再将转轴夹持在头架顶尖和尾座顶尖之间，使主动组件压在从动组件上，从动组件位于头架顶尖外周，与芯轴的中心孔隔开，当台架拨盘转动时主动组件同步转动，会推动从动组件绕头架顶尖转动，使转轴绕中轴线转动，主动组件设置在头架拨盘上，从动组件设置在芯轴端面上，均不设置在转轴外圆上，不会对转轴外圆磨削形成干涉，实现从转轴的一端到另一端的全段磨削加工，实现一次装夹完成转轴外圆面的磨削加工，避免二次装夹，保证转轴的加工精度和同轴度，提高作业效率、保证产品质量，并降低工人劳动强度。
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Figure CN224764957U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a clamping fixture for grinding the outer diameter of a rotating shaft, used for clamping and positioning during grinding of the outer diameter of a rotating shaft. Background Technology
[0002] Motor shafts with a length-to-diameter ratio greater than 5 are classified as long shaft parts. For positioning and clamping long shaft parts, a two-center positioning and a collet chuck are typically used, with a lever driving the collet chuck's rotation. Because the collet chuck is mounted on the outer circumference of the shaft, grinding wheels interfere with this area, preventing grinding of that outer surface. This means that the outer diameter grinding of this type of high-precision motor shaft cannot be completed in a single positioning and clamping operation, requiring secondary clamping and segmented machining. However, secondary clamping and positioning easily increases wear between the center holes and centers at both ends of the shaft, making it difficult to guarantee the dimensional accuracy of the outer diameter grinding. This leads to excessive coaxiality of the motor shaft, increasing wear on the center holes and centers, compromising dimensional accuracy, resulting in high rework rates, low processing efficiency, and doubled worker workload. The purpose of this solution is to design a clamping fixture that allows for single-clamping grinding of the shaft's outer diameter surface, avoiding secondary clamping. Utility Model Content
[0003] The grinding fixture for the outer diameter of the rotating shaft provided by this utility model will not interfere with the grinding of the outer diameter of the rotating shaft, and realize the grinding process of the entire section from one end of the rotating shaft to the other end. It can complete the grinding process of the outer diameter of the rotating shaft in one clamping, avoid secondary clamping, ensure the machining accuracy and coaxiality of the rotating shaft, improve work efficiency, ensure product quality, and reduce the labor intensity of workers.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A rotary shaft external cylindrical grinding clamping fixture includes a headstock center and a tailstock center mounted on a machine tool worktable. One end of the rotary shaft is fixed to a mandrel. The headstock center extends into the central hole of the mandrel, and the tailstock center extends into the central hole at the other end of the rotary shaft. The fixture is characterized by further including an active component that can drive the rotary shaft to rotate around its central axis and a driven component mounted on the threaded hole on the end face of the mandrel and located on the outer periphery of the headstock center. The active component is mounted on the headstock dial of the machine tool worktable and presses against the driven component. The active component drives the driven component to rotate around the headstock center as the headstock dial rotates, thereby driving the rotary shaft to rotate.
[0005] Preferably, the active component includes a bolt, a nut fitted on the bolt, and a washer fitted on the bolt. The nut is tightened into the U-shaped end face groove of the headstock dial, and the washer abuts against the end face of the headstock dial as the nut is tightened.
[0006] Preferably, the driven component includes a bolt 2 threadedly tightened into a threaded hole on the end face and a nut 2 fitted onto the bolt 2, the nut 2 pressing against the end face of the mandrel as the bolt 2 is tightened.
[0007] Preferably, both bolt one and bolt two are arranged along the axis of rotation, with bolt one located above bolt two, and the head of bolt one pressing on the head of bolt two.
[0008] Preferably, the contact length between the head of bolt one and the head of bolt two is not less than 4 cm.
[0009] Preferably, the machine tool worktable is equipped with a roller support seat that supports the middle part of the rotating shaft, and the rollers on the roller support seat make rolling contact with the rotating shaft.
[0010] The beneficial effects of this utility model are: This utility model discloses a grinding fixture for the outer diameter of a rotating shaft. The active component is mounted on a table dial, and the driven component is mounted on the threaded hole on the end face of the mandrel. The rotating shaft is then clamped between the headstock center and the tailstock center, with the active component pressing against the driven component. The driven component is located on the outer periphery of the headstock center, separated from the center hole of the mandrel. When the table dial rotates, the active component rotates synchronously, pushing the driven component to rotate around the headstock center, causing the rotating shaft to rotate around its central axis. Since the active component is located on the headstock dial and the driven component is located on the end face of the mandrel, neither is located on the outer diameter of the rotating shaft, thus avoiding interference with the grinding of the outer diameter. This allows for full-section grinding from one end of the rotating shaft to the other, completing the grinding of the outer diameter of the rotating shaft in a single clamping operation, avoiding secondary clamping, ensuring the machining accuracy and coaxiality of the rotating shaft, improving work efficiency, guaranteeing product quality, and reducing the labor intensity of workers. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the grinding fixture for the outer diameter of the rotating shaft in a specific implementation.
[0012] Figure 2 This is a schematic diagram of the active component.
[0013] Figure 3 This is a schematic diagram of a passive component.
[0014] Figure 4 This is a schematic diagram of the mandrel.
[0015] Figure 5 This is a schematic diagram of the headstock dial. Detailed Implementation
[0016] The following is combined Figures 1-5 The embodiments of this utility model will be described in detail below.
[0017] A grinding fixture for a rotating shaft includes a headstock tip 1 and a tailstock tip 2 mounted on a machine tool worktable. One end of the rotating shaft 100 is fixed to a spindle 101. The headstock tip 1 extends into the central hole of the spindle 101, and the tailstock tip 2 extends into the central hole of the other end of the rotating shaft 100. The fixture is characterized by further including an active component 3 that can drive the rotating shaft 100 to rotate around its central axis and a driven component 4 mounted on the end face threaded hole 102 of the spindle 101 and located on the outer periphery of the headstock tip 1. The active component 3 is mounted on the headstock dial 5 of the machine tool worktable and presses against the driven component 4. The active component 3 drives the driven component 4 to rotate around the headstock tip 1 as the headstock dial 5 rotates, thereby driving the rotating shaft 100 to rotate.
[0018] The aforementioned fixture for grinding the outer diameter of the rotating shaft involves mounting the driving component 3 on the table dial 5 and the driven component 4 on the end threaded hole 102 of the mandrel 101. The rotating shaft 100 is then clamped between the headstock center 1 and the tailstock center 2, so that the driving component 3 presses against the driven component 4. The driven component 4 is located on the outer periphery of the headstock center 1 and is separated from the center hole of the mandrel. When the table dial 5 rotates, the driving component 3 rotates synchronously, which pushes the driven component 4 to rotate around the headstock center 1, causing... The rotating shaft 101 rotates around the central axis. The active component 3 is set on the headstock dial 5, and the driven component 4 is set on the end face of the spindle 101. Neither component is set on the outer circle of the rotating shaft 100, so it will not interfere with the grinding of the outer circle of the rotating shaft. This allows for full-section grinding from one end of the rotating shaft to the other, and completes the grinding of the outer circle of the rotating shaft in one clamping. This avoids secondary clamping, ensures the machining accuracy and coaxiality of the rotating shaft, improves work efficiency, ensures product quality, and reduces the labor intensity of workers.
[0019] The active component 3 includes a bolt 31, a nut 32 fitted on the bolt 31, and a washer 33 fitted on the bolt 31. The nut 31 is tightened in the U-shaped end face groove 51 of the headstock dial 5, and the washer 33 abuts against the end face of the headstock dial 5 as the nut 31 is tightened.
[0020] The driven component 4 includes a bolt 41 threadedly tightened into the threaded hole 102 on the end face and a nut 42 fitted onto the bolt 41. The nut 42 abuts against the end face of the spindle 101 as the bolt 41 is tightened.
[0021] The end face of the mandrel 101 has multiple end face threaded holes 102 for fixing the mandrel 101 to the rotating shaft 100. A bolt 41 is screwed into one of the end face threaded holes 102 on the mandrel 101. The bolt 41 is positioned in the U-shaped end face groove 51 by the locking of the nut 42. The contact length between the bolt 41 and the bolt 31 is adjusted by adjusting the thickness of the shim 33. The rotating shaft 100 is clamped between the headstock tip 1 and the tailstock tip 2 so that the bolt 31 presses on the bolt 41. When the headstock dial 5 rotates, the bolt 31 pushes the bolt 41 to rotate around the headstock tip 1, so that the rotating shaft 100 rotates around the central axis. This avoids the use of a heart-shaped head to clamp the outer circle of the rotating shaft, avoids interference between the grinding tool and the fixture, and realizes the machining of the outer circle of the rotating shaft in one clamping.
[0022] Bolt 31 and bolt 41 are both axially arranged along the rotating shaft 100. Bolt 31 is located above bolt 41, and the head of bolt 31 presses against the head of bolt 41. Since bolt 41 is separated from the center hole of the spindle 1, the heads of bolt 31 and bolt 41 are in contact with each other. Bolt 31 is located above bolt 41. When the headstock dial 5 rotates, bolt 31 will push bolt 41 to rotate, causing the rotating shaft 100 to rotate.
[0023] The contact length between the head of bolt 31 and the head of bolt 41 is not less than 4cm. This ensures that bolt 31 can effectively transmit force to bolt 41 when the headstock dial 5 rotates, thus improving the reliability of the shaft drive.
[0024] The machine tool worktable is equipped with a roller support seat 6 that supports the middle part of the rotating shaft 100. The rollers 61 on the roller support seat 6 form rolling contact with the rotating shaft 100. The support of the roller support seat 6 on the middle part of the rotating shaft 100 can prevent the rotating shaft from bending and deforming due to gravity, further improving the machining accuracy and coaxiality of the rotating shaft. The rolling contact between the rollers 61 and the rotating shaft 100 reduces the friction between them and reduces the influence of the roller support seat 6 on the rotational speed of the rotating shaft 100.
[0025] The technical solutions of the embodiments of this utility model have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
Claims
1. A clamping fixture for external cylindrical grinding of a rotating shaft, comprising a headstock center and a tailstock center mounted on a machine tool worktable, wherein a mandrel is fixed at one end of the rotating shaft, the headstock center extends into the center hole of the mandrel, and the tailstock center extends into the center hole at the other end of the rotating shaft, characterized in that: It also includes an active component that can drive the spindle to rotate around the central axis and a driven component that is mounted on the end face threaded hole of the spindle and located on the outer periphery of the headstock tip. The active component is mounted on the headstock dial of the machine tool table and presses against the driven component. The active component drives the driven component to rotate around the headstock tip as the headstock dial rotates, thereby driving the spindle to rotate.
2. The shaft external cylindrical grinding clamping fixture according to claim 1, characterized in that: The active component includes a bolt, a nut fitted on the bolt, and a washer fitted on the bolt. The nut is tightened into the U-shaped end face groove of the headstock dial, and the washer abuts against the end face of the headstock dial as the nut is tightened.
3. The shaft outer diameter grinding clamping fixture according to claim 2, characterized in that: The driven component includes a bolt 2 that is threadedly tightened into a threaded hole on the end face and a nut 2 that is fitted onto the bolt 2. The nut 2 abuts against the end face of the spindle as the bolt 2 is tightened.
4. The shaft outer cylindrical grinding clamping fixture according to claim 3, characterized in that: Both bolt one and bolt two are installed along the axis of rotation, with bolt one located above bolt two, and the head of bolt one pressing on the head of bolt two.
5. The shaft external cylindrical grinding clamping fixture according to claim 4, characterized in that: The contact length between the head of bolt one and the head of bolt two is not less than 4cm.
6. The shaft external cylindrical grinding clamping fixture according to claim 1, characterized in that: The machine tool worktable is equipped with a roller support seat that supports the middle part of the rotating shaft, and the rollers on the roller support seat make rolling contact with the rotating shaft.