Forming lathe tool or thread comb tool can be used to turn threads on lathe. Because of its simple structure, forming turning tool is a common method to produce threaded workpieces in small batches. Using thread comb cutter to turn threads has high production efficiency, but the cutter structure is complex, which is only suitable for turning fine teeth and short threads in medium and large-scale production.

2, thread milling

Milling with disc cutter or comb cutter on thread milling machine. Disc milling cutter is mainly used for milling trapezoidal external thread on screw, worm and other workpieces. The pitch accuracy of thread milling can generally reach 8 ~ 9 grades, and the surface roughness is R5 ~ 0.63 microns. This method is suitable for mass production of threaded workpieces with average precision or rough machining before grinding.

3, thread grinding

It is mainly used to process the precision thread of hardened workpiece on the thread grinder. This method is suitable for grinding precision screws, thread gauges, worms, small batches of threaded workpieces and shovel grinding precision hobs.

4, thread grinding

Nut-type or screw-type thread grinding tool is made of soft materials such as cast iron, and the part of the workpiece with pitch error is rotated back and forth to improve the pitch accuracy. Hardened internal threads are usually ground to eliminate deformation and improve accuracy.

5. Tapping and tapping

Tapping is to screw the tap into the pre-drilled bottom hole on the workpiece with a certain torque to process internal threads. Tapping and tapping can be done by hand, or by lathe, drilling machine, tapping machine and tapping machine.

6. Wire rolling

Suitable for mass production of external threads of standard fasteners and other threaded connectors. Generally, the outer diameter of the rolled thread is not more than 25mm, the length is not more than 100mm, the thread accuracy can reach Grade 2, and the diameter of the blank used is roughly equal to the middle diameter of the processed thread.

Extended data:

Thread processing tool

Tools for machining threads by cutting methods, such as taps, dies, thread turning tools, thread milling cutters and automatic thread cutting heads.

1, tap and die are standard tools for machining or trimming internal and external threads, with simple structure and convenient use.

2. Thread turning tool can be used to turn internal and external threads, which is a forming turning tool with the same shape as thread teeth. There are three kinds: flat, prismatic and round.

3. The thread comb cutter is a multi-tooth thread turning tool, which has coarse cutting teeth and fine cutting teeth, so it can process threads in one or several cutting strokes.

4. There are three kinds of thread milling cutter: disc milling cutter, comb milling cutter and cyclone milling cutter. Disc thread milling cutter is mainly used for machining trapezoidal thread and large pitch worm. Comb thread milling cutter is an annular tooth milling cutter. When working, the workpiece rotates 1.25 ~ 1.5 to cut all threads.

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