Manufacturing method of self-drilling anchor rod bit

Abstract

The invention discloses a manufacturing method of a self-drilling anchor rod bit, and belongs to a production method of an anchor rod. The manufacturing method comprises the following steps that: a cemented carbide material briquette is placed in a casting mold of the anchor rod bit, and molten iron or molten steel is injected into the casting mold; and after the molten iron or molten steel is cooled in the mold, a shape of a matrix of the anchor rod bit is formed, and the matrix is in fusion welding with the cemented carbide material briquette into a whole. According to the nominal content of each elemental composition, the iron-based cemented carbide briquette formed by uniformly mixing and sintering tungsten carbide particles, vanadium pentoxide, colloidal graphite, diamond particles with iron matrix pre-alloy powder can replace the traditional cemented alloy manufactured by metal cobalt and tungsten carbide which are adhered to each other to prepare the self-drilling anchor rod bit. The blade of the anchor rod bit is in fusion welding on the matrix directly, and the subsequent mechanical processing of the anchor rod bit is not needed; and meanwhile, the operation of the method is simple, the production efficiency of the anchor rod bit is obviously improved, and the production cost is effectively reduced because of using the iron-based cemented carbide briquette.

Description

technical field [0001] The present invention relates to a method for producing anchor rods, more specifically, the present invention mainly relates to a method for manufacturing self-propelled anchor rod drill bits. Background technique [0002] Drills for self-advancing bolts usually use cemented carbide blades and cast iron shafts, and cemented carbides are usually made of cobalt bonded with tungsten carbide or titanium carbide. China is a country lacking in metal cobalt resources, so anchors The blade of the drill bit is relatively expensive, and the anchor drill bit is a one-time consumable with a huge amount, which increases the production and use costs of the anchor drill bit, and the original cemented carbide of the anchor drill bit needs to be machined after welding. It is very difficult to cut and process cemented carbide, so it is necessary to develop other materials instead of cemented carbide, and use new preparation methods instead of machining cemented carbide,...

AI Technical Summary

Problems solved by technology

[0003] One of the purposes of the present invention is to address the above-mentioned deficiencies and provide a method for manufacturing a self-propelled rock bolt drill bit, in order to solve the problem of the high cost of cobalt in the prior art, and the lack of bonding between the particle reinforcement phase of the same type of iron matrix alloy material and the matrix. technical problems such as poor fluidity, low volume fraction of particle-reinforced phase, and difficult machining of drill bit blades