A milling cutter for thread milling with less interference

A technology for milling and thread milling, applied in thread cutting tools, metal processing equipment, manufacturing tools, etc., can solve the problems of reducing tool life, affecting thread machining accuracy, uneven wear of cutting teeth, etc., to improve thread accuracy, The effect of prolonging the service life and reducing the production cost

Active Publication Date: 2019-09-17
XIANGTAN UNIV
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

During the thread milling process, because the tooth shape of the thread milling cutter does not conform to the processing surface, machining interference occurs, which greatly affects the thread processing accuracy
In addition, when the rigidity of the tool is insufficient, the processed thread will have a taper, and even the thread will be unqualified, and the uneven wear of each cutting tooth of the thread milling cutter will reduce the tool life

Method used

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  • A milling cutter for thread milling with less interference
  • A milling cutter for thread milling with less interference
  • A milling cutter for thread milling with less interference

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the contents of the present invention, and detailed implementation steps are given.

[0033] The implementation object of the present invention is a trapezoidal thread milling cutter, the major diameter D=24mm and minor diameter D of this trapezoidal thread milling cutter 1 =18.5mm, pitch P=5mm, which includes a tool body 1 that can rotate around the axis of rotation, and cutting blades 2 that are evenly distributed in the circumferential direction, and is characterized in that: the tooth shape of the cutting teeth on the cutting blade 2 is a The establishment of a special tooth profile that can reduce machining interference mainly includes the following steps:

[0034] 1) Establish thread theoretical tooth profile;

[0035] 2) Calculate the maximum overcut E during thread milling max ...

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Abstract

A milling cutter for thread milling with less interference comprises a cutter body capable of rotating around a spin axis and cutting blades evenly distributed in the circumferential direction. The milling cutter is characterized in that the tooth forms of cutting teeth of the cutting blades are special tooth forms which can reduce machining interference. Tooth form outline modeling mainly comprises the following steps that firstly, a thread theoretical tooth form outline is established; secondly, the maximum over-cutting amount Emax in the thread milling process is calculated; thirdly, the tooth root length and the tooth top length of the tooth form outline of the thread milling cutter are changed; and fourthly, the special tooth form outline capable of reducing interference of thread milling is obtained. In addition, the milling cutter comprises a cutting part and a handle part, and half cutting blades on the cutting part are provided with back tapers. By means of the thread milling cutter, interference generated in the thread milling process can be reduced, the initial process of milling is stable, the cutting force is relatively small, the thread machining precision can be effectively improved, and the service life of the milling cutter can be effectively prolonged.

Description

technical field [0001] The invention relates to metal cutting, in particular to a milling cutter for large-pitch and large-diameter threads with less interference in numerical control milling. Background technique [0002] Compared with traditional thread processing methods such as thread turning and tap and die processing, thread CNC milling has great advantages in processing accuracy and processing efficiency. In the process of CNC thread milling, the thread milling cutter can be easily removed when it breaks, and it has good versatility. CNC milling has been widely used to process threads abroad. [0003] Thread milling cutters generally use helical interpolation to process threads. While the tool rotates with the spindle of the machine tool, it performs cutting motion along the center of rotation of the workpiece while moving axially. During the thread milling process, because the tooth shape of the thread milling cutter does not conform to the processing surface, machi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23G5/18
Inventor 胡自化谭兆秦长江李众
Owner XIANGTAN UNIV
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