Primary and secondary bottom spray type laser welding diamond drill bits and manufacturing method thereof

Abstract

The invention discloses a main and auxiliary bottom spraying type laser-welding diamond drill bit and a manufacturing method thereof. A pipe orifice of a steel pipe base body is smaller than a pipe body so as to form a step, a reinforcement ring is coaxially welded on the step, an annular water flow cavity is formed between the reinforcement ring and the pipe orifice and the step, multiple matrixes are welded on the end face of the pipe orifice and the end face of the reinforcement ring, and a water stop block is welded between every two adjacent matrixes. Multiple main bottom spraying holes and multiple groups of auxiliary bottom spraying holes communicated with the step are formed in the annular water flow cavity, the main bottom spraying holes are aligned to water outlet holes of the water stop blocks, and the groups of auxiliary bottom spraying holes are aligned to the matrixes. A high-strength drill tooth cold-pressing blank is manufactured by adopting a high-strength cold-pressing method, and the matrixes are manufactured by adopting a bidirectional-pressing low-temperature vacuum hot-pressing method, are arranged on the pipe orifice and the reinforcement ring through laser welding and then are subjected to medium-temperature tempering heat treatment after welding to complete follow-up finished product machining. The main and auxiliary bottom spraying type laser-welding diamond drill bit is large in cooling scour area, effectively reduces heat fatigue damages at weld joint positions and has the advantages of being high in ageing, high in core-taking rate and long in service life.

Description

technical field [0001] The invention relates to a diamond geological drill bit, in particular to a main and auxiliary bottom spray type laser welding diamond drill bit and a manufacturing method thereof. Background technique: [0002] With the depletion of mineral resources in shallow strata and rising labor costs, the demand for new drill bits with "single-hole single-drilling" and "high efficiency and long life" is becoming more and more urgent in geological prospecting work. [0003] At present, the effective method recognized in the industry to increase the life of the drill bit is mainly to increase the height of the drill bit matrix, but in the existing conventional intermediate frequency production method and electroplating production method, it is impossible to solve the problem of improving the drill bit matrix height and matrix strength. , the quality of the diamond in the carcass, and the bonding strength between the carcass and the matrix (hereinafter referred to...

AI Technical Summary

Problems solved by technology

[0005] However, with the heightening of the working matrix, none of the above manufacturing methods can effectively guarantee the quality of the drill bit in terms of matrix strength, abrasive grain quality, and matrix-matrix bonding strength, which limits the development of diamond drill bits.

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