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Crossed grooves located and double-screw locked crown drilling blade

A technology of cross grooves and locking teeth, which is used in repair drilling, drilling tool accessories, drilling/drilling equipment, etc., can solve the problems of limited use range, high production cost, poor reliability, etc. Simple, reliable clamping effect

Inactive Publication Date: 2016-02-03
SUZHOU AHNO PRECISION CUTTING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These positioning and locking methods have their own characteristics, or the structure is complex, the production cost is high, or the reliability is poor, and the scope of use is limited.

Method used

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  • Crossed grooves located and double-screw locked crown drilling blade
  • Crossed grooves located and double-screw locked crown drilling blade
  • Crossed grooves located and double-screw locked crown drilling blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Below in conjunction with accompanying drawing, technical solution of the present invention will be further described:

[0025] Such as Figure 1-7 The crown drill blade is locked by cross-groove positioning double screws. The crown drill blade includes a working end 31 and a mounting end 32 connected to the same blade axis 30. The working end 31 of the crown drill blade is processed with a first blade. The positioning surface 37, the second blade positioning surface 38, the third blade positioning surface 39, the fourth blade positioning surface 40, the first blade positioning surface 37 and the second blade positioning surface 38 are distributed symmetrically with the center of the blade axis 30, and the third blade positioning surface The surface 39 and the fourth blade positioning surface 40 are distributed symmetrically with the center of the blade axis 30, forming two sets of intersection surfaces for matching with the blade groove of the drill body. The crown dr...

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PUM

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Abstract

The present invention relates to a crossed grooves located and double-screw locked crown drilling blade. The crown drilling blade comprises a working end and an installing end. A first blade locating surface, a second blade locating surface, a third blade locating surface and a fourth blade locating surface are formed on the working end. The first and second blade locating surfaces are in central symmetry distribution about the axis of the blade, and the third and fourth blade locating surfaces are in central symmetry distribution about the axis of the blade, forming two sets of cross facets. Two fastening facets are symmetrically disposed on the installing end of the crown drilling blade. The working end is provided with a spiral blade chip groove and a blade edge. The blade edge and the blade chip groove form a section of spiral cylindrical surface with the same lead and a certain width. The working end is provided with a spiral protection edge. The protection edge and the blade chip groove form a section of spiral surface with the same lead, a front angle of -15 to 0 degree and a certain width. The working end is provided with a cutting edge consisting of a main cutting edge, a transition edge, an inner edge and a cross edge. With double-side pressure locking way, the crown drilling blade can bear a large clamping force, and the blade clamping is reliable.

Description

technical field [0001] The invention relates to a cross groove positioning double screw locking tooth crown drill blade. Background technique [0002] The crown drill bit is a combined drill bit in which the head is made of cemented carbide or other high-performance materials, and the drill rod is made of alloy steel. It has the advantages of low cost of use and large processing range. [0003] At present, there are many combinations of the head and the drill pipe of the crown drill bit. For example, there are many forms such as "column pin positioning, screw through locking", "cross V-shaped surface positioning, rear pull screw locking", "open pin positioning, non-screw rotation clamping" and many other forms. These positioning and locking methods have their own characteristics, or have complex structures, high production costs, poor reliability, and limited application ranges. Contents of the invention [0004] The purpose of the present invention is to overcome the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/00
CPCB23B51/00B23B2251/04B23B2251/043B23B2251/14B23B2251/204B23B2251/28
Inventor 刘伟金章斌仲益朱向平
Owner SUZHOU AHNO PRECISION CUTTING TECH CO LTD