Multi-tooth internal thread turning tool
By designing a multi-tooth internal thread cutting tool and using multiple tooth cutting heads for simultaneous cutting, the problem of low efficiency in internal thread machining is solved, achieving high-efficiency and low-cost thread machining, and adapting to internal thread machining of different specifications and precision.
Patent Information
- Application Number
- CN202422757357.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-13
AI Technical Summary
In the existing technology, internal thread machining requires multiple cutting passes, resulting in low machining efficiency and high tool costs, making it difficult to adapt to thread machining of different specifications and precision.
Design a multi-tooth internal thread cutting tool, including a finishing head, a third-cutting head, a second-cutting head, and a primary-cutting head, with equal tooth height and pitch. It adopts an integral or split structure and reduces the need for multiple feeds by cutting simultaneously through multiple tooth heads.
It achieves one-time thread forming of internal threads, improves machining efficiency, reduces tooling costs, is highly adaptable, has a simple structure, and is flexible in operation.
Smart Images
Figure CN223476514U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a multi-tooth internal thread turning tool. Background Art
[0002] In thread machining, external threads are machined using dies, while internal threads are machined using taps and other specialized tools. Different dies and taps are required for different specifications, fits, and precision levels of internal and external threads. However, manufacturing these tools is expensive, and most production processes involve turning the threads. A lathe operator grinds a single-tooth cutting tool tip and controls the thread pitch diameter through multiple feeds. Figure 1 As shown, Figure 1 In the diagram, A represents the tool setting position, B represents the first feed position, C represents the second feed position, D represents the thread cutting tool, and E represents the product. This type of tool requires multiple feeds to complete the machining process. It can adapt to internal and external thread machining with different fits and precision requirements, but its machining efficiency is very low. Summary of the Invention
[0003] To solve the above-mentioned technical problems, this utility model provides a multi-tooth internal thread turning tool with simple structure and high working efficiency.
[0004] The technical solution of this utility model to solve the above-mentioned technical problems is: a multi-tooth internal thread turning tool, including a tool body, with a fine cutting head provided in the middle of the front end of the tool body, and two three-cutting heads, two two-cutting heads and two initial cutting heads symmetrically distributed from the middle to both sides of the front end of the tool body based on the fine cutting head.
[0005] The tooth height of the above-mentioned multi-tooth internal thread cutting tools decreases sequentially from the finishing cutter head, the three-cutting cutter head, the two-cutting cutter head, and the primary cutter head.
[0006] In the above-mentioned multi-tooth internal thread cutting tools, the tooth height difference between the finishing cutter head and the third cutter head, the third cutter head and the second cutter head, and the second cutter head and the initial cutter head are all equal.
[0007] In the above-mentioned multi-tooth internal thread cutting tools, the pitch between the finishing cutter head and the third cutter head, the third cutter head and the second cutter head, and the second cutter head and the initial cutter head are all equal.
[0008] The aforementioned multi-tooth internal threading tool adopts an integral structure and is made entirely of high-speed steel.
[0009] The aforementioned multi-tooth internal thread turning tool adopts a split structure, with the tool body and each tool tip connected together by welding.
[0010] The beneficial effects of this utility model are as follows: This utility model adopts multi-tooth cutting head for simultaneous cutting, and removes metal in layers by increasing the thickness of each tooth. The multi-tooth cutting head participates in cutting at the same time, and the thread is formed in one feed. By having multiple cutting heads participate in cutting at the same time, the number of feeds is reduced, and the thread turning efficiency is improved. It has the advantages of flexible operation, simple structure and good versatility, and has the value of promotion and use. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the existing technology for turning external threads using a single cutting head.
[0012] Figure 2 This is a schematic diagram of the structure of this utility model.
[0013] Figure 3 This is a magnified view of the blade.
[0014] Figure 4 This is a schematic diagram of the cutting process of this utility model.
[0015] Figure 5 A schematic diagram for determining the positioning dimensions of the tool tip. DETAILED DESCRIPTION
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0017] like Figure 2 , Figure 3 As shown, a multi-tooth internal thread turning tool includes a tool body 1. A finishing head 2 is located at the center of the front end of the tool body 1. Based on the finishing head 2, two triple-cutting heads 3, two double-cutting heads 4, and two primary-cutting heads 5 are symmetrically distributed from the center outwards from the front end of the tool body 1, allowing for left and right feeds to produce threads in both directions. The tooth height of the finishing head 2, triple-cutting head 3, double-cutting head 4, and primary-cutting head 5 decreases sequentially. The tooth height difference h' between the finishing head 2 and triple-cutting head 3, between the triple-cutting head 3 and double-cutting head 4, and between the double-cutting head 4 and primary-cutting head 5 are all equal. The pitch P between the finishing head 2 and triple-cutting head 3, between the triple-cutting head 3 and double-cutting head 4, and between the double-cutting head 4 and primary-cutting head 5 are all equal.
[0018] Multi-thread internal threading tools can be of a single, integral design, made entirely of high-speed steel. Alternatively, they can be of a split design, with the tool body 1 and each tool tip welded together.
[0019] like Figure 4As shown, thread turning on a conventional lathe or CNC lathe using shift cutting is similar to thread turning with a single-tooth cutting head. The primary cutting head 5, secondary cutting head 4, tertiary cutting head 3, and finishing cutting head 2 all participate in the cutting simultaneously, reducing the number of feeds and improving thread turning efficiency. When cutting a reverse thread, the spindle rotation direction remains unchanged, and the cutting head moves in the opposite direction. In this case, the primary, secondary, tertiary, and finishing cutting heads on the other side participate in the cutting simultaneously.
[0020] When using, such as Figure 5 As shown, Figure 5 φ is the pitch line of the multi-tooth cutter head for thread pitch correction (the pitch line is parallel to the lathe spindle, and the cutter teeth are perpendicular to the spindle). The lathe is set up according to the pitch and the reference table on the lathe. When the spindle rotates, the tool post is displaced axially according to the ratio, which can form a spiral trajectory tool mark on the outer circle surface of the product. After checking that the pitch meets the requirements, the tool tip positioning dimension H is determined. Then, the tool is fed into the Y-axis direction to form the thread.
Claims
1. A multi-tooth internal thread turning tool, characterized in that: The blade body includes a precision cutting head located in the middle of its front end. Based on the precision cutting head, two triple cutting heads, two double cutting heads, and two primary cutting heads are symmetrically distributed from the middle to both sides of the front end of the blade body.
2. The multi-thread internal thread turning tool according to claim 1, characterized in that: The tooth height of the fine cutting head, the third cutting head, the second cutting head, and the primary cutting head decreases in that order.
3. The multi-thread internal thread turning tool according to claim 2, characterized in that: The tooth height difference between the fine cutting head and the third cutting head, the third cutting head and the second cutting head, and the second cutting head and the primary cutting head are all equal.
4. The multi-thread internal thread turning tool according to claim 1, characterized in that: The pitches between the precision cutting head and the third cutting head, the third cutting head and the second cutting head, and the second cutting head and the primary cutting head are all equal.
5. The multi-tooth internal thread turning tool according to claim 1, characterized in that: The multi-tooth internal thread cutting tool adopts an integral structure and is made entirely of high-speed steel.
6. The multi-thread internal thread turning tool according to claim 1, characterized in that: The multi-tooth internal thread turning tool adopts a split structure, with the tool body and each tool tip connected together by welding.