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How a flat thread rolling die is made
Release time:
2022-12-02
The flat thread rolling die manufacturer tells you that the forging quality of the blank should be strictly controlled, and the thread part is not allowed to have serious carbide segregation, otherwise it is easy to break the teeth during thread rolling.
The process route of flat thread rolling die is: blank forging → quenching and tempering → machining → inner hole quenching → machining (thread rolling) → outer diameter melting and tempering → inspection.
The flat thread rolling die manufacturer tells you that the forging quality of the blank should be strictly controlled, and the thread part is not allowed to have serious carbide segregation, otherwise it is easy to break the teeth during thread rolling. The purpose of quenching and tempering is to improve the forging structure, obtain lower hardness and plasticity, so as to roll the thread after machining. Quenching and tempering is carried out in a box furnace, heat preservation at 550~600°C for 2 hours, then rise to 890±10°C for 4~6 hours, then air cooling or oil cooling, tempering temperature 760±30°C, heat preservation for 6~ After 8 hours, the furnace is cooled to 600~650°C, water cooled to 300°C, and then cooled to room temperature in air. Hardness after quenching and tempering HB2017-241.
The quenched and tempered blank is then machined into shape, and after the inner hole is treated with high frequency, the thread is rolled. The thread rolling die made by rolling method has a longer service life than that made by turning method. Inner hole high-frequency melting fire, single-turn or double-turn inner hole inductors can be used. The flat thread rolling die manufacturer tells you that the carbides in this type of high alloy steel are not easy to dissolve, so it is not suitable to use an excessively high heating rate.
The processing technology of flat thread rolling die is introduced here, if you need help, please contact our company.
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