pcd drill bit

Abstract

The application relates to the technical field of drill bit structure, and specifically discloses a PCD drill bit, including: a tool handle, a tool bar arranged at the end of the tool handle, and a polycrystalline diamond PCD tool head arranged at the end of the tool bar away from the tool handle; The side of the rod and the PCD cutter head is provided with a chip removal groove, which is arranged in a spiral around the axis of the drill bit, and the width of the chip removal groove gradually decreases from the direction from the PCD cutter head to the handle; There is a land protruding from the land between the grooves, and the land and the chip flute extend in the same direction; from the PCD head to the handle, the height of the land protruding from the land decreases gradually. The PCD drill bit provided by this application has high strength, and the groove width near the tool handle is small, which increases the strength of the tool holder and prolongs the service life; There is no margin on the blade back, which avoids excessive contact between the outer diameter of the tool holder and the hole wall.

Description

Technical field [0001] The present application relates to a drill bit structural technique, in particular to a PCD drill bit. Background technique [0002] Polycrystalline Diamond, referred to as PCD) The drill bit has the advantages of high hardness, high pressure resistance, thermal conductivity and wear resistance, can achieve higher machining accuracy and processing efficiency in high-speed cutting, gradually become in the industry. Popular products. The body structure of the drill bit includes a knife rod and a blade portion disposed on the front end of the knife rod, and the blade portion is used to cut treatment of the workpiece. Micro Diamates usually refer to a drill bit having a diameter of less than 3.175 mm in the blade portion, in order to ensure smooth micro droplet drash, common PCD micro Diamates usually in the knife rods to set the rules. However, the problem thereby is to reduce the strength of the knife rod, affecting the service life of the PCD micro drill, an...

AI Technical Summary

Problems solved by technology

However, the resulting problem is that the strength of the tool bar is reduced, which affects the service life of the PCD micro-drill, and once the tool bar breaks during processing, it will cause serious damage to the workpiece, waste raw materials, and even high-speed rotating The knife rod will also pose a certain threat to the life and health of the operator.

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