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Twist drill

A technology of twist drill and working part, which is applied in the field of metal cutting processing and metal cutting tools, can solve the problems of difficult positioning, slow speed and low efficiency of twist drill drilling, achieve high drilling efficiency, less burrs on the cutting edge, Smooth drilling effect

Active Publication Date: 2020-02-18
上海钰工工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of difficult positioning, slow speed and low efficiency of twist drills in the prior art, the application proposes the following technical solutions

Method used

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0052] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relationship between the components in a certain posture (as shown in the drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

[0053] In addition, the descriptions involving "first"...

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Abstract

The application provides a twist drill. The front end of a working portion is provided with a cone portion, and the outer side face of the working portion is provided with a spiral groove used for dividing discharged cuttings; the outer side face of the cone portion is provided with a plurality of groups of compound cutting edges from the front end to the tail end, and the diameters of the compound cutting edges are increased in sequence; and the top end of the cone portion is provided with a drill tip top edge. In use, the drill tip top edge can play a role in initial location, and the cutting process is finished jointly by the drill tip top edge and the multiple groups of the compound cutting edges. Since the diameters of the drill tip top edge and the multiple groups of the compound cutting edges are increased from the tip end to the tail end in sequence, the margin of an object cut by the drill tip top edge and the cutting edges can be allocated according to the drilling diameter rationally; the cut object is divided and cut gradually, and the cutting force is dispersed on the cutting edges; the reaction force received by each cutting edge is decreased, and burrs on cut edges are less; and the drilling process is more smooth, and the drilling efficiency is higher.

Description

technical field [0001] The present application relates to the technical field of metal cutting processing and metal cutting tools, in particular to twist drills. Background technique [0002] figure 1 It is a schematic diagram of a conventional structure twist drill. figure 1 The left side of the upper middle row is the front view of the twist drill, and the right side is the top view of the drill tip. figure 1 The next line in the middle is the 3D stereogram of the partially truncated twist drill. Twist drills are mostly used in workplaces far away from other metal cutting machine tools such as drill presses. Hand-held electric tools are used for drilling operations. Limited by human arm strength and power tool power, the efficiency of existing twist drills in drilling It is subject to great constraints-difficult punching and positioning, slow speed, and low efficiency. [0003] figure 1 The twist drill with the conventional structure shown in the diagram shows the ana...

Claims

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Application Information

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IPC IPC(8): B23B51/02
CPCB23B51/02B23B2251/04B23B2251/18B23B51/009
Inventor 王宏嘉
Owner 上海钰工工具有限公司
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