Production technology of tin-plated wire-drawing die slip-in cover

Abstract

The production process of tinned wire-drawing die inserting cover includes the procedure steps of pressing die, drawing die the turning, etc. Said invention utilizes selection of technological die cover and die core whose melting point is higher than that of internal metal powder, so that when they are heated and pressurized, said technological die cover and die core can not be deformed, and the natural diamond is covered with sintered body, so that under the condition of high temp. and high pressure the pressure acting on the natural diamond covered with sintered body is small, and said natural diamond can not be easily broken, and it is favorable for turning bell mouth in next process, and is favorable for identification of broken diamond.

Description

(1) Technical field [0001] The invention relates to a production process of a tin-plated wire drawing die insert. (2) Background technology [0002] At present, the production process of conventional tin-plated wire drawing die inserts, such as figure 1 and figure 2 As shown, its steps are: first put a small amount of metal powder 3a in the hole of a titanium alloy mold cover 4a, then natural diamond 2 is glued on another piece of titanium alloy mold core 1a with glue, and pressed in the hole (such as figure 1 Shown), and put it on the heating equipment to heat and pressurize at the same time, after the high temperature and high pressure, the titanium alloy mold core 1a is pressed into the hole. Carry out turning with lathe at last again, the front and back of titanium alloy mold cover 4b and titanium alloy mold core 1b are turned out bell mouth, allow the natural diamond 2 embedded in powder metallurgy body 3b to expose (as figure 2 shown), the whole nesting process en...

AI Technical Summary

Problems solved by technology

One of the most important problems in such a processing process is that it is easy to break the natural diamond, which increases the manufacturing cost

Because the titanium alloy mold core pressed on the natural diamond is hard, so under high temperature and high pressure, the natural diamond is stressed and easily broken

If the temperature is raised to soften the titanium alloy mold core, the entire titanium alloy mold sleeve will also soften and deform. Since there is no force around the natural diamond, the natural diamond will be easily broken during the production process; on the contrary, if the temperature If the titanium alloy core and metal powder are both in a non-melting state, since the upper titanium alloy core is hard and the lower metal powder is powdery, it is easy to cause the natural diamond to break during processing

Secondly, because the upper part of the finished product that wraps the natural diamond is a titanium alloy core, it is in a bonded state with the surface of the natural diamond after high-temperature and high-pressure sintering, and the natural diamond cannot be seen clearly when turning the bell mouth of the titanium alloy core in the later stage It is impossible to identify whether the natural diamond is broken or not, which will consume too much man-hours and labor on products that have become waste products.

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