As we all know, metal wires, bars, pipes and profiles with special sections are mostly manufactured by drawing processes, but the drawing dies currently used mostly use cemented carbide materials, which have high hardness and wear resistance. Good features, in order to better use the drawing die manufacturing design changed, the drawing die in use is inlaid on the outside of the steel sleeve, between the two using a tight fit with greater interference, or using heat To avoid the phenomenon of alloy drawing die being cracked during the working process, the die core and the steel sleeve adopt a large cone angle to match the cone angle, and the cone angle is between 12° and 90°.
Can reflect the following advantages:
1. The large-angle taper is used between the mold core and the steel sleeve, which is more convenient in assembly and unloading. After ensuring a good taper, the requirements for the size of other processed parts are not high, which not only reduces the link Of waste products, saving a lot of man-hours;
2. The use of the large-angle cone surface makes the force of the mold more reasonable; the force generated by the drawn profile can make the combination of the mold and the steel sleeve closer; compared with the prior art, the outer diameter of the steel sleeve is the same The section thickness of the steel sleeve is relatively increased, which strengthens the clamping force of the steel sleeve on the mold core and prolongs the life of the mold core.
3. When the mold core is worn out and scrapped, the mold core can be easily withdrawn from the steel sleeve;
4. In order to increase the working stability of the mold, the inner corner of the lower part of the steel sleeve can also be upset and riveted inward to form a positioning hook for the mold core, which will have better adaptability to shock and vibration; 5. Simple structure and significant economic benefits. It is worth promoting.
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