Substrate for processing cutter and manufacturing method of substrate and drill bit using substrate

Abstract

The invention discloses a substrate for processing a cutter and a manufacturing method of substrate and a drill bit using the substrate; the substrate is a hard alloy material; the substrate is provided with at least two alloy sections with different hardness; and the substrate is formed by integrally pressing and sintering a plurality of sections. The drill bit comprises a drill tip section and a drill body section, and the hardness of the drill tip section is more than that of the drill body section. According to the substrate for processing the cutter and the manufacturing method thereof and the drill bit using the substrate, because the substrate for processing the cutter is provided with a plurality of alloy sections with different hardness, the alloy sections with higher hardness can be used for manufacturing the cutting part of the cutter, such as the drill tip of the drill bit. In such a manner, the wear resistance of the drill bit and the drill tip can be improved, and the service life of the cutter is prolonged. The alloy sections with lower hardness can be used for manufacturing the cutter body of the cutter, such as the drill body of the drill bit. The drill body is provided with a spiral groove and bear the drilling pressure and torque, so that the toughness of the drill body can be improved by the alloy sections with lower hardness, so that the drill breakage probability of the drill bit is reduced.

Description

technical field [0001] The invention relates to the field of cutting tools, more specifically, to a base material for machining tools, a manufacturing method thereof and a drill bit using the base material. Background technique [0002] Micro-drills for processing printed circuit boards generally use high-hardness WC carbide as the material, and the spiral groove and drill tip of this drill are all processed from the same material. As we all know, the spiral flute part of the drill bit only plays the role of chip removal, while the drill tip part is the main body of cutting. If the two parts use the same hard alloy material with high hardness and poor toughness, although the high hardness and high wear resistance of the drill tip part are guaranteed, the helical groove part is prone to breakage. On the contrary, if the same cemented carbide material with slightly lower hardness and relatively better toughness is used, although the spiral groove part is not easy to break, th...

AI Technical Summary

Problems solved by technology

If the two parts use the same hard alloy material with high hardness and poor toughness, although the high hardness and high wear resistance of the drill tip part are guaranteed, the spiral groove part is prone to breakage

On the contrary, if you use the same cemented carbide material with slightly lower hardness and relatively better toughness, although the spiral groove part is not easy to break, the drill tip part is not wear-resistant

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