15-year precision mould making

    Today, I am going to analyze the manufacturing process of core pins and sleeves. Core pins and sleeves are similar with other machine tools and parts. Basically it is a physical change, which produces deformation but material remains the same.
    The manufacturing process of core pins and sleeves:
    1.wire-drawing and cut-off
    Put the testing qualified raw materials on the wire drawing machine to achieve the required diameter size, and then cut into each rodlike core pins and sleeves embryo with fixed length.
    2.heat-treatment
    Before heat treatment, adjust and flat the core pins and sleeves embryos on straight platform with a dial gauge. And then put them in the high frequency electric furnace or salt bath furnace heating to 800 ~ 1300 degrees centigrade, Stay 2 ~ 5 minutes. After the fine-quenching heat treatment, the pinpoint hardness can reach Hv590-800, and then process them with low temperature tempering.
    3.Grinding
    Splint the core pins and sleeves on the collet chuck of machine tool. According to the request of any tip base angle size of core pins and sleeves, separately grinding process them.
    4.Polishing
    Polishing is to clean up oil stains and rust on the surface, and to make the surface clean.
    5.Inspection and warehousing
    Inspect the core pins and sleeves according to the benchmark index, and the qualified can be boxed into the warehouse.
    Above is the manufacturing process of core pins and sleeves. Chinese core pins and sleeves manufacturer should have a certain understanding of these knowledge, which will benefit you a lot.