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

Abstract

The invention discloses a metal powder pre-pressing device for a polycrystalline diamond wire-drawing die bushing. A metal powder pre-pressing process is realized by a pressure source operation mechanism using a mechanical jack as a pressure source, a lower press head operation mechanism and a pressure value display mechanism, so that the whole metal powder pre-pressing process is easy to operate, visible and controlled, and has an accurate pressure value, and the inconvenience caused by frequently changing pressure data through a pre-pressing device controlled by using a hydraulic device can be avoided. Meanwhile, the invention provides a metal powder pre-pressing method which is realized based on the metal powder pre-pressing device, an enough amount of base powder, an enough amount of circumferential powder and an enough amount of top powder which are put into the periphery of polycrystalline diamond blanks are pre-pressed for three times so that a metal bushing with good sintering quality can be formed around the polycrystalline diamond blanks in a sintering process of the polycrystalline diamond wire-drawing die. The metal powder pre-pressing device and the metal powder pre-pressing method are suitable for pre-pressing the metal powder before the bushing is sintered by using middle-scale 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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