Hot pressing die of diamond tool bit, preparation method of diamond tool bit, diamond tool bit and diamond drill bit

Abstract

The invention discloses a hot pressing die of a diamond tool bit, a preparation method of the diamond tool bit, the diamond tool bit and a diamond drill bit, and the prepared diamond tool bit is in an arc sheet shape and comprises a drilling and cutting tool bit with a rectangular longitudinal section and a sharp-corner tool bit with a triangular longitudinal section; according to the hot-pressing die for the diamond tool bit, the upper pressing head and the lower pressing head are respectively divided into two parts for the drilling and cutting tool bit and the sharp-corner tool bit, so that the structure of the die pressing head group is simpler, and the manufacturing cost is lower; hot-pressing pressure can be provided according to a shrinkage ratio during hot-pressing sintering, so that the use is more flexible; the top of the drilling end face of the manufactured diamond tool bit forms a triangular pinnacle tool edge, so that excellent self-sharpening and sharpness of the tool bit are kept, and the diamond tool bit is high in wear resistance and long in service life; the formed diamond tool bit is small in size and shape error, high in precision and good in quality; the diamond drill bit can rapidly cut in a material to be drilled and cut, the drilling and cutting speed of the tool bit is increased, the drilling and cutting sharpness is improved, and the cutting stability and safety are guaranteed.

Description

technical field [0001] The invention relates to the technical field of diamond cutting tools, in particular to a hot-pressing die for a diamond cutting head, a method for preparing a diamond cutting head, a diamond cutting head and a diamond cutting head. Background technique [0002] Diamond bit is a tool for drilling stone, concrete, brick wall, etc. It has high strength, high wear resistance and impact resistance. It is widely used in drilling processing and can adapt to high abrasiveness and high concrete grades. The cutting performance is relatively good; among them, the diamond bit includes a matrix and a diamond bit. The diamond bit is formed by the consolidation of diamond particles and a matrix binder. The diamond particles mainly play the role of cutting edges; the diamond bit is in the formation. When drilling, the diamond bit is aligned with the drilling position, and the diamond bit rotates through the diamond bit to drill the stratum to realize the drilling wor...

AI Technical Summary

Problems solved by technology

[0004] 1. The existing diamond segment generally has two steps of cold press forming process and hot press forming process in the production process. Among them, the hot press forming process determines important parameters such as the performance and quality of the diamond segment, so the diamond segment The hot pressing die is the key to forming the diamond cutter head; the existing hot pressing die has a mold frame, an upper indenter and a lower indenter. The structure of the teeth leads to complicated manufacture of the upper and lower indenters; and the upper indenter and the lower indenter are respectively made into an integrated structure, and the manufacturing cost is very high;

[0005] 2. Since the diamond segment will shrink during heating and sintering, that is, the volume of the diamond segment before heating and sintering is larger than the volume after heating and sintering; and the shrinkage ratio of the arc-shaped sheet part and the tine part is different. When the upper indenter and the lower indenter are made into an integrated structure, the same pressure can only be applied to the arc-shaped sheet part and the tine part at the same time, resulting in the overall structure of the diamond segment being not dense during hot pressing and sintering, resulting in the formation of the diamond segment. Large errors in size and shape, low precision, and poor quality;

[0006] 3. During the hot pressing process of the existing hot pressing mold, the tips of the upper and lower pressing heads are easily damaged, and the entire mold can only be discarded, and the service life of the hot pressing mold is short;

[0007] 4. Due to the different structures of the arc-shaped flake part and the tine part, it is easy to change the distribution structure of diamond particles in the diamond cutter head during the pressing process of the upper and lower indenters of the mold, the self-sharpness of the diamond cutter head, Sharpness and wear resistance will deteriorate

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