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Exchangeable tip drill

A kind of drill bit and cutter head technology, which is applied in the direction of drill repair, drilling tool accessories, drilling/drilling equipment, etc., and can solve the problem of complex stop structure and other problems

Pending Publication Date: 2020-05-15
CHENGDU FENGYI PRECISION TOOLS MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present application provides an exchangeable-tip drill to improve the complicated problem of the anti-rotation structure that prevents the cutter head from rotating relative to the cutter bar in the existing exchangeable-tip drill

Method used

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Examples

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Effect test

Embodiment

[0061] The embodiment of the present application provides an exchangeable head drill 100, which can realize the stop rotation of the cutter head 20 through a simple structure, which can effectively increase the torque transmission capacity between the cutter bar 10 and the cutter head 20, and can realize centering stably, conveniently and quickly Load and unload the cutter head 20.

[0062] Such as figure 1 As shown, an exchangeable head drill 100 includes a cutter bar 10 and a cutter head 20 . The end of the knife rod 10 is provided with a limiting groove 11 . The cutter head 20 has a docking portion 21 for coaxially arranging the cutter head 20 and the cutter bar 10 after being matched with the limiting groove 11 . The inner peripheral wall of the limiting groove 11 matches the outer peripheral wall of the docking portion 21 .

[0063] Wherein, the peripheral wall of the docking portion 21 includes a first curved surface 211 , and the first curved surface 211 includes a fi...

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Abstract

The invention provides an exchangeable tip drill, and belongs to the field of cutting tools. The exchangeable tip drill comprises a drill shank and a drill tip, wherein the end part of the drill shankis provided with a limiting groove. The drill tip is provided with a butt joint part for coaxially arranging the drill tip and the drill shank after being matched with the limiting groove, and the inner peripheral wall of the limiting groove is matched with the outer peripheral wall of the butt joint part; the outer peripheral wall of the butt joint part comprises a first curved surface, the first curved surface comprises a first gradual change surface, and an intersecting line between the first gradual change surface and a cross section of the butt joint part is a gradual change line with adistance to a center line of the drill tip gradually reduced. According to the exchangeable tip drill, rotation stopping of the drill tip is achieved through the gradual change structure, and the rotation stopping structure is simple. In addition, the first gradual change surface of the butt joint part may have a large area of contacting with the inner peripheral wall of the limiting groove of thedrill shank, and torque transmitting capability between the drill shank and the drill tip can be increased.

Description

technical field [0001] The present application relates to the field of cutting tools, in particular, to an exchangeable head drill. Background technique [0002] In recent years, hole machining tools, especially cemented carbide drills, have developed rapidly. In order to achieve high efficiency, low cost, and save cemented carbide materials, new structures of replaceable drills continue to appear. In the replaceable-tip drill, an anti-rotation structure for preventing the rotation of the cutter head relative to the arbor needs to be provided between the cutter head and the arbor. The anti-rotation structure of the existing exchangeable-tip drill is relatively complicated. Contents of the invention [0003] An embodiment of the present application provides an exchangeable-tip drill to improve the problem of a relatively complicated anti-rotation structure for preventing the rotation of the cutter head relative to the cutter bar in the existing exchangeable-tip drill. [0...

Claims

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Application Information

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IPC IPC(8): B23B51/00
CPCB23B51/00B23B2251/02B23B2251/24B23B2251/40
Inventor 彭路贵彭浩张豪
Owner CHENGDU FENGYI PRECISION TOOLS MFG
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