Abrasion-resistant counter sinking cutter

Abstract

The invention discloses an abrasion-resistant counter sinking cutter, which comprises a cylindrical cutter handle and a cutter bar; a rectangular main blade fixing groove is formed in the middle of the lower end face of the cutter bar; a first L-shaped gap is formed on the lower end face of the cutter bar and positioned on each of two sides of the main blade fixing groove; a main blade is arranged in the main blade fixing groove; a main cutting edge gradually approaches to the axis of the cutter bar from the outer side of the main blade to the center of the main blade so as to form an inclined shape; a second L-shaped gap extending axially along the cutter bar and communicated with the main blade fixing groove is formed on each of two sides of the lower end face of the cutter bar and is close to the main cutting edge, so that a chip removal groove of the main cutting edge is formed; a secondary blade is arranged on a lateral surface of each first L-shaped gap; an end cutting edge is formed at the end of each secondary blade; a lateral cutting edge is formed on the outer lateral surface of each secondary blade; and the end cutting edges are 0.1 to 0.2 millimeter shorter than the main cutting edge in the axial direction. According to the cutter, the service lives of the cutting edges are long; the size precision of the cutter is high; the cutter bar has high strength; and the cutter is high in cutting efficiency and easy and convenient to manufacture, install and maintain.

Description

technical field [0001] The invention relates to a machining tool, in particular to a tool for countersinking. Background technique [0002] Countersinking refers to machining countersunk holes and boss sections on processed holes, or machining bottom planes in processed blind holes, etc. Countersinking processing is different from general milling processing. In milling processing, the tool is fixed The rotating movement of the shaft and the up and down lifting, the workpiece fixed on the worktable will move horizontally and vertically in the horizontal plane, so as to process a certain shape. In the countersinking process, the workpiece is fixed, and only the rotating tool is fed in the vertical direction to complete the machining of the countersink, boss section or bottom plane in the blind hole. Therefore, it has the characteristics of simple processing procedures and low requirements on machine tools. A common countersinking tool includes a tool handle connected to the ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a wear-resistant countersinking tool to solve the problems of easy wear, short service life and low precision of the existing tools for spot-spotting the bottom surface of a machined blind hole. , the blade and the shank are combined through a splicing structure, which can greatly improve the service life of the blade and help improve its precision size

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