In the field of machinery manufacturing, thread machining is a basic and critical technology, which is widely used in various fasteners, connectors and transmission components.

The quality and accuracy of thread machining directly affects the performance and reliability of products. In this paper, we will explain in detail the various methods of thread machining from the aspects of equipment, process and characteristics.

thread machining

A thread is a helical shape used to connect or fasten parts. Advances in thread machining technology have led to more diverse and precise manufacturing of threads.

Understanding the different methods of thread machining helps in choosing the right process to meet the needs of different products.

Cutting threads

Equipments: thread lathe, thread milling machine

Cutting threads is the process of removing material from a workpiece by mechanical cutting to form a thread. This method is suitable for machining threads of various materials and sizes.

Process

  • Thread turning: Using a thread lathe, the process is carried out by means of a single- or multi-flute thread turning tool.
  • Milling threads: using a thread milling machine, processing is carried out by means of a rotating milling cutter.

Characteristics

  • High accuracy and good surface quality.
  • Suitable for internal and external threads.
  • High material removal, suitable for materials with high hardness.

Thread rolling

Equipment: Thread rolling machine

Rolling thread is a no-cutting processing method to form threads by plastic deformation.

Process

  • Using a thread rolling machine, the workpiece is placed in a mould and the material is plastically deformed by rotation and pressure.

Characteristics

  • Increased material strength, no cutting loss.
  • Increased surface hardness and good wear resistance.
  • Suitable for high strength materials and precision thread processing.

Extruded threads

Equipment: Extruder

Extruded threads are similar to rolled threads, but with higher pressure and more pronounced material flow.

Process

  • High pressure is applied through the extruder, causing the material to flow inside the die to form a thread. Characteristics
  • Fast processing speed and high production efficiency.
  • Suitable for internal and external threading of pipes and bars.

Casting thread

Equipment: Casting equipment

Casting threads are formed directly during the casting process.

Process

  • Design the shape of the thread in the casting mould and fill the mould with material to form the thread during casting. Characteristics
  • Suitable for mass production.
  • Saving material and processing time.
  • Relatively low precision and surface quality.

Welding Threads

Equipment: Welding equipment

Welding threads are formed on the surface of the workpiece by welding.

Process

  • Welding equipment is used to overlay a threaded shape on the surface of the workpiece. Characteristics:
  • Suitable for repairing worn threads or machining threads on materials that are difficult to cut.
  • Strength and durability are lower than cutting and rolling threads.

Thread grinding

Equipment: Thread grinding machine

Thread grinding is the precision machining of threads using grinding wheels or abrasives.

Process

  • On a thread grinding machine, machining is carried out by precisely controlling the relative motion of the abrasive tool and the workpiece. Characteristics
  • Extremely high machining accuracy and good surface quality.
  • Suitable for high-precision threads and complex thread shapes.

Thread Stamping

Equipment: Punching machine

Thread stamping is the use of a punch to process a plate to form a thread.

Process

  • On a punch press, the plate is stamped by means of a die to gradually form a thread. Characteristics
  • High production efficiency, suitable for mass production.
  • It is suitable for thread processing of thin plate materials.

summaries

There are a variety of thread machining techniques, and each method has its own unique application scenarios and advantages. Choosing the right thread machining method can significantly improve productivity, reduce costs and ensure product quality.

With the progress of manufacturing technology, the future of thread machining will be more automated and intelligent to meet higher standards of manufacturing needs.

In actual production, manufacturers need to choose the most suitable thread machining method based on the material properties of the product, thread specifications, accuracy requirements and production batch size and other factors.

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