A workpiece machining fixture with internal threads
By designing a workpiece machining fixture with internal threads and utilizing the cooperation between the external threads and the tension groove, the problem of internal thread damage during workpiece clamping is solved, achieving a high-efficiency and low-damage workpiece clamping effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN HONGTAI EAST ELECTRICAL & MECHANICAL EQUIP
- Filing Date
- 2025-06-06
- Publication Date
- 2026-07-31
AI Technical Summary
In the prior art, the internal threads of slender workpieces with internal threads are easily damaged during clamping, and the tension is difficult to adjust, affecting the machining accuracy.
Design a workpiece machining fixture with internal threads. The external thread precisely meshes with the internal thread of the workpiece. Combined with the tensioning groove on the fixture body, it can achieve automatic centering and uniform clamping, reducing damage to the internal thread.
By using the combination of external threads and tension grooves, workpieces can be quickly and easily clamped, reducing the damage rate of internal threads by more than 90%, and adapting to the tension requirements of different workpieces.
Smart Images
Figure CN224575157U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of workpiece fixtures for lathe boring, specifically a workpiece machining fixture with internal threads. Background Technology
[0002] During the boring process on a lathe, the workpiece needs to be clamped and fixed. However, when clamping a slender cylindrical workpiece with internal threads, if conventional triangular jaws are used to clamp and fix the workpiece, the internal threads at the end of the workpiece are easily damaged, affecting the machining accuracy of the product.
[0003] CN204338923U discloses a precision boring anti-deformation cooling process device, which comprises two parts: a clamping anti-deformation device and a deep hole finishing cooling process device. First, the clamping anti-deformation device connects to the workpiece with threads during clamping and has an external annular groove machined at a certain position to transfer internal stress, thereby controlling deformation due to clamping and cutting internal stress. Second, the deep hole finishing cooling process device employs internal cooling during deep hole boring, increasing oil flow and improving heat dissipation, ensuring smooth chip removal and reducing cutting thermal deformation. Simultaneously, the precision boring tool is aligned with the guide key and contacts the inner wall of the workpiece, supporting the suspended tool holder, thus achieving straightness in the deep hole boring of slender inner holes. Although this clamping anti-deformation device uses an internal thread connected to the external thread of the workpiece, it is not suitable for clamping workpieces with internal threads, and the size of the external thread is fixed, preventing fine adjustment.
[0004] Currently, conventional triangular jaws are prone to damaging the internal threads of slender workpieces when clamping them. Furthermore, the tension of the triangular jaws is difficult to adjust when clamping the inner wall of the workpiece. Therefore, it is of great significance to develop a suitable workpiece machining fixture that can reduce damage to the internal threads during workpiece machining and facilitate adaptive clamping tension during machining. Utility Model Content
[0005] The purpose of this utility model is to provide a workpiece machining fixture with internal threads that is simple in structure and easy to use, so as to solve the problems mentioned in the background art.
[0006] The technical solution adopted by this utility model to solve the technical problem is as follows: A workpiece machining fixture with internal threads includes a fixture body, which is a hollow cylinder with external threads. One end of the hollow cylinder is provided with an annular baffle, and multiple tensioning grooves are spaced apart on the fixture body.
[0007] This workpiece machining fixture with internal threads achieves automatic centering and positioning through the precise meshing of the external thread and the internal thread of the workpiece. The tensioning groove on the fixture body facilitates the quick and easy screwing of the external thread of the machining fixture into the internal thread of the workpiece. When the triangular jaws on the CNC machine tool are engaged in the hollow cavity of the hollow cylinder, the hollow cylinder of the fixture body is tensioned and fits tightly against the inner wall of the workpiece, which facilitates the turning of the outer wall of the slender workpiece. Multiple tensioning grooves, combined with the self-locking characteristics of the threads, can generate a uniform radial clamping force, which can reduce the surface damage rate of the workpiece by more than 90%.
[0008] Preferably, the tensioning groove includes an inner tensioning groove formed on the hollow cylinder and / or an outer tensioning groove extending from the annular baffle into the hollow cylinder.
[0009] In one exemplary embodiment, the inner tensioning grooves and outer tensioning grooves are alternately distributed on the hollow cylinder. Preferably, the number of inner tensioning grooves and outer tensioning grooves is 3 to 8.
[0010] Preferably, the inner tensioning groove and the outer tensioning groove are evenly distributed around the circumference.
[0011] In one exemplary embodiment, there are four inner tension grooves and four outer tension grooves, and the spacing between adjacent inner tension grooves and outer tension grooves is equal.
[0012] In one exemplary embodiment, the depth of the inner tensioning groove and the outer tensioning groove is 1 / 2 to 4 / 5 of the height of the clamp body. Preferably, the depth of the inner tensioning groove and the outer tensioning groove is 2 / 3 to 3 / 4 of the height of the clamp body.
[0013] The annular baffle has a wrench placement hole for holding the wrench when disassembling the machining fixture, so as to facilitate the quick removal of the fixture from the workpiece.
[0014] Preferably, the annular baffle and the hollow cylinder are integrally formed.
[0015] The beneficial effects of this utility model are: Compared with existing technologies, this technology is suitable for machining workpieces with internal threads at the ends, especially slender hollow workpieces. Through the cooperation of external threads and tensioning grooves, it is easy and quick to connect to the threaded end of the workpiece, and it is also convenient for the triangular jaws on conventional CNC machine tools to clamp and fix the workpiece without damaging the internal threads at the end of the workpiece. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of a workpiece machining fixture with internal threads according to Embodiment 1 of this utility model; Figure 2 This is a front view of a workpiece machining fixture with internal threads according to Embodiment 1 of this utility model; Figure 3This is a top view of a workpiece machining fixture with internal threads according to Embodiment 1 of this utility model; Figure 4 This is a three-dimensional structural diagram of a workpiece machining fixture with internal threads according to Embodiment 2 of this utility model; Figure 5 This is a bottom view of a workpiece machining fixture with internal threads according to Embodiment 2 of this utility model; Figure 6 This is a three-dimensional structural diagram of a workpiece machining fixture with internal threads according to Embodiment 3 of this utility model; Figure 7 This is a three-dimensional structural diagram of a workpiece machining fixture with internal threads according to Embodiment 4 of this utility model; Figure 8 This is a bottom view of a workpiece machining fixture with internal threads according to Embodiment 4 of this utility model; In the diagram: 1. Hollow cylinder; 11. External thread; 2. Annular baffle; 21. Wrench placement hole; 3. Internal tension groove; 4. External tension groove; 5. Workpiece with internal thread; 6. Triangular chuck. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] Example 1
[0019] Please see Figure 1-3 This embodiment of a workpiece machining fixture with internal threads includes a fixture body, which is a hollow cylinder 1 with external threads 11. One end of the hollow cylinder 1 is provided with an annular baffle 2, and multiple tensioning grooves are spaced apart on the fixture body.
[0020] The tensioning groove includes an inner tensioning groove 3 formed on the hollow cylinder 1 and an outer tensioning groove 4 extending from the annular baffle 2 toward the hollow cylinder 1.
[0021] The inner tensioning grooves 3 and the outer tensioning grooves 4 are staggered on the hollow cylinder 1, and the inner tensioning grooves 3 and the outer tensioning grooves 4 are evenly distributed in a circle; there are 4 inner tensioning grooves 3 and 4 outer tensioning grooves 4, and the spacing between adjacent inner tensioning grooves 3 and outer tensioning grooves 4 is equal.
[0022] The depths of both the inner tension groove 3 and the outer tension groove 4 are 2 / 3 of the height of the fixture body.
[0023] The annular baffle 2 is provided with a wrench placement hole 21, which is used to hold the wrench when disassembling the processing fixture, so as to facilitate the quick removal of the fixture from the workpiece.
[0024] The annular baffle 2 and the hollow cylinder 1 are integrally formed.
[0025] Example 2
[0026] Please see Figure 4 and 5 This embodiment of a workpiece machining fixture with internal threads includes a fixture body, which is a hollow cylinder 1 with external threads 11. One end of the hollow cylinder 1 is provided with an annular baffle 2, and multiple tensioning grooves are spaced apart on the fixture body.
[0027] The tensioning groove includes six inner tensioning grooves 3 formed on the hollow cylinder 1. The inner tensioning grooves 3 are evenly distributed in a circle on the hollow cylinder 1. The spacing between adjacent inner tensioning grooves 3 is equal, and the depth of the inner tensioning groove 3 is 3 / 4 of the height of the clamp body.
[0028] The annular baffle 2 and the hollow cylinder 1 are integrally formed.
[0029] Example 3
[0030] Please see Figure 6 This embodiment of a workpiece machining fixture with internal threads includes a fixture body, which is a hollow cylinder 1 with external threads 11. One end of the hollow cylinder 1 is provided with an annular baffle 2, and multiple tensioning grooves are spaced apart on the fixture body.
[0031] The tensioning groove includes four outer tensioning grooves 4 formed on the hollow cylinder 1. The outer tensioning grooves 4 are evenly distributed in a circle on the hollow cylinder 1. The spacing between adjacent outer tensioning grooves 4 is equal, and the depth of the inner tensioning groove 3 is 1 / 2 of the height of the clamp body.
[0032] The annular baffle 2 is provided with a wrench placement hole 21, which is used to hold the wrench when disassembling the processing fixture, so as to facilitate the quick removal of the fixture from the workpiece.
[0033] The annular baffle 2 and the hollow cylinder 1 are integrally formed.
[0034] Example 4
[0035] Please see Figure 7 and 8 The workpiece machining fixture with internal threads in this embodiment differs from that in Embodiment 1 in the following ways: There are 6 inner tension grooves 3 and 6 outer tension grooves 4, and the spacing between adjacent inner tension grooves 3 and outer tension grooves 4 is equal.
[0036] The depths of both the inner tension groove 3 and the outer tension groove 4 are 3 / 5 of the height of the fixture body.
[0037] The working principle and usage method of a workpiece machining fixture with internal threads according to this utility model: The external thread 11 of the hollow cylinder 1 of the workpiece machining fixture with internal thread is threadedly connected to the internal thread at the end of the workpiece. The tension groove on it facilitates the quick screwing of the machining fixture into the end of the workpiece to be machined. When the triangular jaw 6 of the CNC machine tool is clamped with the machining fixture, it can be better tensioned, reducing damage to the internal thread at the end of the machining fixture.
[0038] In use, the external thread 11 of the workpiece machining fixture with internal thread of this application is rotated to connect with the internal thread of the workpiece, and then the triangular jaw 6 of the CNC machine tool is inserted into the hollow cylinder 1 of the machining fixture to effectively clamp and fix the workpiece.
[0039] This utility model discloses a workpiece machining fixture with internal threads. The number and depth of its tensioning grooves can be adjusted according to the length and weight of the workpiece to be processed. For example, if the required tension adjustment range is large, the number and depth of the tensioning grooves can be increased accordingly, and vice versa. For example, the tensioning grooves may include 3 inner tensioning grooves 3 and 3 outer tensioning grooves 4. The depth of the inner tensioning grooves 3 and the outer tensioning grooves 4 is 4 / 5 of the height of the fixture body. The above scheme can be understood by those skilled in the art from the text description, so no further detailed description is required with accompanying drawings.
Claims
1. An in-line threaded workpiece machining fixture, characterized by, Includes a clamp body, which is a hollow cylinder (1) with external threads (11), and an annular baffle (2) is provided at one end of the hollow cylinder (1). Multiple tensioning grooves are spaced apart on the clamp body.
2. The workpiece machining fixture with internal threads as described in claim 1, characterized in that, The tensioning groove includes an inner tensioning groove (3) formed on the hollow cylinder (1) and / or an outer tensioning groove (4) extending from the annular baffle (2) toward the hollow cylinder (1).
3. The internally threaded workpiece machining clamp of claim 2, wherein, The number of inner tension grooves (3) and outer tension grooves (4) is 3 to 8, and the inner tension grooves (3) and outer tension grooves (4) are distributed alternately on the hollow cylinder (1).
4. The internally threaded workpiece machining clamp of claim 3, wherein, The inner tensioning groove (3) and the outer tensioning groove (4) are evenly distributed around the circumference.
5. The internally threaded workpiece machining clamp of Claim 4, wherein, The number of inner tension grooves (3) and outer tension grooves (4) is 4 each, and the spacing between adjacent inner tension grooves (3) and outer tension grooves (4) is equal.
6. A workpiece machining clamp with internal threads as claimed in any one of claims 2 to 4, wherein, The depth of the inner tension groove (3) and the outer tension groove (4) is 1 / 2 to 4 / 5 of the height of the clamp body.
7. The internally threaded workpiece machining clamp of Claim 6, wherein, The depth of the inner tension groove (3) and the outer tension groove (4) is 2 / 3 to 3 / 4 of the height of the clamp body.
8. The internally threaded workpiece machining clamp of claim 1, wherein, The annular baffle (2) has a wrench placement hole (21).