Metal powder pre-pressing device and method for polycrystalline diamond wire drawing die insert

Abstract

The invention discloses a metal powder pre-pressing device used for polycrystalline diamond wire drawing die inserts, which realizes metal powder pre-pressing by means of a pressure source operating mechanism using a mechanical jack as a pressure source, a lower pressure head operating mechanism and a pressure value display mechanism. The whole metal powder pre-pressing process is easy to operate, the pressure value is accurate, visible and controllable, thus avoiding the inconvenience caused by the frequent replacement of pressure data by the pre-pressing device controlled by the hydraulic device. At the same time, the present invention provides a metal powder pre-pressing method based on the above-mentioned metal powder pre-pressing device. By pre-pressing a sufficient amount of bottom powder, ring powder and top powder placed around the polycrystalline diamond blank in three times, the polycrystalline diamond During the sintering process, the diamond wire drawing die can form a metal insert with good sintering quality around the polycrystalline diamond blank. The metal powder pre-pressing device and method are suitable for pre-pressing the metal powder before sintering the insert for medium and large-scale polycrystalline diamond blanks.

Description

technical field [0001] The invention relates to a metal powder pre-pressing device used for sintering inserts of polycrystalline diamond wire drawing dies, and also relates to a metal powder pre-pressing method based on the metal powder pre-pressing device, belonging to the technical field of wire drawing die processing. Background technique [0002] The polycrystalline diamond wire drawing die insert is to insert the polycrystalline diamond blank into the stainless steel mold sleeve through powder metallurgy. The role of the crystalline diamond blank, and at the same time, the tensile crushing strength of the polycrystalline diamond blank itself is greatly improved. The function of the polycrystalline diamond wire drawing die is to forcibly pull the metal wire through the inner hole of the die with external force, compress its cross section, and produce deformation to meet the size required by the product. For wire drawing dies with medium and large apertures, the tensile ...

AI Technical Summary

Problems solved by technology

However, for medium and large-sized polycrystalline diamond blanks, due to the variety of shapes and sizes, customers have different requirements for the shape of stainless steel mold sets, and many other complicated factors, the pressure value used for pre-pressing needs to be changed frequently.

However, the general-purpose self-controlled hydraulic device needs to input data and then the hydraulic device automatically completes it. Frequent data replacement makes the operation cumbersome and handy, and also affects the processing efficiency.

In addition, general-purpose self-controlled hydraulic devices require regular additional maintenance work such as replacing hydraulic oil and replacing vulnerable parts, and the hydraulic devices are expensive

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