Drill bit production technology capable of reducing crystal defects

Abstract

The invention discloses a drill bit production technology capable of reducing crystal defects. The drill bit production technology comprises the steps of blank blanking, forging, cutting machining, heat treatment and grinding machining. The heat treatment comprises the stops of preheat, heating and heat preservation, quenching and tempering. The preheat comprises the steps that after heating is conducted to be at 550-600 DEG C and heat preservation is conducted for 10-20 min firstly, heating is conducted again to be at 800-850 DEG C and heat preservation is conducted for 10-20 min; quenching comprises the steps that low-temperature preheat is conducted under 450-500 DEG C, middle-temperature preheat is conducted under 800-850 DEG C, then heating is conducted to be at 1200-1250 DEG C to conduct quenching, quenching adopts grading cooling, a sample is taken out of a quenching furnace and then placed into a salt-bath furnace to be cooled to be at 580-600 DEG C, and then the sample is taken out and continuously cooled in air; and preheat, heating and heat preservation and quenching are all conducted in an atmosphere furnace which internally adopts nitrogen. According to the drill bit production technology capable of reducing the crystal defects, the crystal defects generated in a drill bit can be reduced in the production process, internal stress is reduced, the drill bit strength is reinforced, and tool service life is prolonged.

Description

technical field [0001] The invention relates to a production process, in particular to a drill production process for reducing crystal defects. Background technique [0002] In the machining industry the lathe is considered the working "mother machine" of all equipment. Lathes are mainly used to process shafts, discs, sleeves and other workpieces with rotating surfaces, mainly cylinders. They are the most widely used machine tools in machinery manufacturing and repair factories. Drills are used to drill out solid materials. Through holes or blind holes, and tools that can ream existing holes. Commonly used drills mainly include twist drills, flat drills, center drills, deep hole drills and casing drills. Drills are one of the most widely used tools in precision machining. [0003] With the development of modern manufacturing technology, high-speed steel drill bits are widely used in cutting processing. During use, the front end of the drill bit has to bear a lot of pressu...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that high-speed steel drills are prone to wear, bending, excessive rotation of the drill, impact gaps and even fractures, which are not conducive to processing quality. The purpose is to provide a drill production process that reduces crystal defects. Reduce the crystal defects in the drill bit, reduce the internal stress, enhance the strength of the drill bit, and prolong the service life of the tool