Thread Mill is an efficient tool type used for cutting threads. Unlike traditional tapping tools, thread milling cutters can machine internal and external threads on metal workpieces through milling. Its unique working principle enables it to be flexibly applied on multiple workpieces, especially suitable for small batch production and complex thread machining. This article will explore in detail the types, structural characteristics, and application fields of thread milling cutters to help everyone better understand this type of cutting tool.
1、 Definition and working principle of thread milling cutter
A thread milling cutter is a specialized milling tool used for machining threads. It applies cutting force to the surface of the workpiece through rotational motion, milling the desired thread shape on the workpiece. Unlike traditional tapping methods, thread milling cutters can perform multi-directional cutting and can machine deeper threaded holes. Thread milling cutters are usually made of hard alloys or high-speed steel, and their tool surfaces are specially treated to improve wear resistance and heat resistance.
The working principle of a thread milling cutter is to gradually remove material and form a thread shape by utilizing the contact between the tool edge and the workpiece during milling. Due to the multi axis movement of the thread milling cutter during the milling process, it can adapt to various types and sizes of threads and complete complex thread shape machining. Thread milling cutters can be used for machining internal and external threads, and are an efficient tool for thread manufacturing.
2、 The main types of thread milling cutters
Thread milling cutters can be mainly divided into the following types based on the type and structure of the threads being processed:
Internal thread milling cutter: suitable for machining internal threads, usually used for smaller diameter threaded holes. Its tool design has a special shape that can enter the hole for cutting.
External thread milling cutter: suitable for machining external threads, used to mill the required threads on the outer surface of the workpiece.
Single edge thread milling cutter: The single edge design is suitable for machining small or simple threads, with a fast cutting speed, but may generate significant cutting forces during machining.
Multi edge thread milling cutter: with multiple cutting edges, suitable for machining large-sized threads. Multi blade design can disperse cutting force, improve machining stability and efficiency.
These types of thread milling cutters can provide different machining effects according to different machining requirements and workpiece requirements. Different types of thread milling cutters also have significant differences in tool materials, cutting methods, and applicable ranges.
3、 Structural characteristics of thread milling cutters
The structural design of thread milling cutters is different from traditional milling cutters, and the key components of their cutting tools include the cutting edge, cutting body, and support structure. The following are several main structural characteristics of thread milling cutters:
Thread shaped cutting edge: The cutting edge of a thread milling cutter is usually designed based on the target thread shape, which may be straight or curved, in order to be able to cut different types of threads. When designing, it is necessary to consider the precision of cutting, the durability of cutting tools, and the stability of threads.
Tool angle design: The design of the rake and rake angles of thread milling cutters has a significant impact on cutting performance and thread quality. The appropriate tool angle can reduce cutting force and improve machining efficiency.
High hardness materials: Thread milling cutters are generally made of hard alloys or high-speed steel materials, which have high hardness and wear resistance, and can adapt to high load and high-speed machining requirements.
Coating treatment: In order to further improve the service life and performance of cutting tools, thread milling cutters are usually coated with coatings such as TiN (titanium nitride), TiAlN (aluminum titanium nitride), etc., which can reduce friction and improve heat resistance.
Through these structural designs, thread milling cutters can exhibit excellent performance in various machining environments, especially when processing complex or high-precision threads.
4、 Application fields of thread milling cutters
Thread milling cutters are widely used in mechanical processing, automotive manufacturing, aerospace, petrochemical and other fields, mainly for processing various types of threaded holes. Its application scenarios include but are not limited to:
Precision machinery manufacturing: Thread milling cutters are widely used for thread machining of high-precision components such as precision machine tools, electronic components, and instruments.
Automotive manufacturing: In the production of automotive parts, thread milling cutters are used to machine components such as engine parts, axles, and wheel hubs that require high-precision threads.
Aerospace: Due to the extremely high requirements for material strength and accuracy in the aerospace field, the application of thread milling cutters is particularly important in this field, used for machining aircraft structural components, etc.
Mold manufacturing: In the process of mold manufacturing, thread milling cutters are widely used to produce various standard threads and custom thread molds.
Due to its ability to achieve precise and efficient thread machining, thread milling cutters have become an indispensable tool in modern manufacturing, especially suitable for complex and difficult machining tasks.
In short, thread milling cutters, as an efficient and precise cutting tool, have been widely used in various industries’ production processes. It can not only improve machining accuracy and reduce working hours, but also effectively reduce machining costs. In the future manufacturing industry, with the continuous advancement of technology, the application of thread milling cutters will become increasingly widespread.
