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Flat drill

A flat drill and shoulder technology, applied in the field of flat drills, can solve problems such as no further in-depth understanding

Active Publication Date: 2015-07-29
HANGZHOU GREAT STAR TOOLS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In U.S. Patent No. 7,473,056, it is an example where the inner edge of the groove is parallel to the horizontal shoulder of the flat knife. This patent discloses a shape of the groove, which can be easier and faster when using a flat drill. discharge wood chips, but those skilled in the art do not have a further in-depth understanding of this structure

Method used

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Examples

Experimental program
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Embodiment Construction

[0038] Such as figure 2 As shown, the flat drill of the present invention includes a shank 1, and a flat knife portion 2 formed on the front portion of the handle, the thickness of the flat knife portion is uniform, and the front portion of the flat knife portion extends inwardly from both sides respectively, Form two shoulders, the first shoulder 21 and the second shoulder 22, and the two shoulders continue to gather and extend inwards and upwards, forming two gatherings respectively, the first gathering 23 and the second gathering 24, and The top forms a spire 25 . A first groove is formed on the edge of the first shoulder toward the inside of the flat knife portion, and the inner edge of the first groove is inclined downward toward the outside of the first shoulder, forming a shape greater than 0 with the horizontal line of the flat drill. degree angle. A second groove is formed on the blade portion of the first gathering portion toward the inside of the flat blade porti...

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PUM

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Abstract

The invention discloses a flat drill. The flat drill is characterized by comprising a handle part and a flat knife part which is formed on the front part of the handle part, wherein the front part of the flat knife part extends inwards from two side parts respectively to form two shoulder parts, namely a first shoulder part and a second shoulder part; the two shoulder parts continuously fold and extend inwards and upwards to form two gathering parts respectively, namely a first gathering part and a second gathering part; a tip is formed on the top; a first groove is formed in an edge part of the first shoulder part towards the interior of the flat knife part; the inner edge of the first groove tilts downwards towards the outer side of the first shoulder part and forms an angle of greater than 0 degree with the horizontal transverse line of the flat drill.

Description

technical field [0001] The present invention relates to a drill bit for drilling, more precisely to a flat drill. Background technique [0002] A flat drill is usually a woodworking tool for drilling holes. This drill is easy to control the depth of the hole, so it is suitable for drilling shallower holes and also for drilling through holes, so it is widely used in wooden materials or other similar materials. [0003] Such as figure 1 As shown, the flat drill usually includes a handle 1 and a flat knife part 2 with uniform thickness formed on the front of the handle. For the shoulders 21 and 22, the shoulders continue to converge and extend obliquely upwards, forming two gatherings 23 and 24 respectively, and forming a peak 25 at the top. A groove 211 is formed inward and downward from the edge of the main edge of the shoulder, and an inner edge 212 of the groove is parallel to the shoulder of the flat knife portion 2 . The effect of the groove is to export the wood chip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27G15/00
CPCB27G15/00
Inventor 李跃明
Owner HANGZHOU GREAT STAR TOOLS