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Combination cutting drill tool bit

A compound cutting and cutter head technology, which is applied in the direction of drill repair, drilling tool accessories, drilling/drilling equipment, etc., can solve the problems of easy breakage of the cutter head, poor centering structure, and wear of the cutter head.

Active Publication Date: 2013-11-06
山东新工刀具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the twist drills used in mechanical processing are composed of chisel edge, cutting edge, helical secondary edge, and side edge. The cutting edge and secondary edge generally have a single structure, and the centering structure is poor. A large amount of heat is easily generated when (milling) a workpiece with higher hardness, which causes the hardness of the cutter head to decrease, causing the wear of the cutter head. It is symmetrical when working, and the cutting amount is generally only tens of microns to 1 mm, so it is difficult to grasp the angle and height during manual grinding. In addition, the precision of these twist drills and the processed holes is unqualified, which is easy to Waste products occur, and at the same time, there is a problem of lifting the workpiece when processing thin workpieces, causing industrial accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0037] Such as figure 1 As shown, the drill bit for compound cutting according to the first embodiment of the present invention is a drill bit for compound cutting. The drill bit 2 is connected with the external drilling equipment through the positioning hole 17 or the positioning groove 18, including the tool bit 1. The surface of the tool head 1 facing the cutting direction is the cutting surface 3, the surface on the back side of the top of each cutting surface 3 is the rear cutting surface 4, and the surface on the outer side of the cutting surface 3 is the side cutting surface 5, and the cutting surface 3 and the rear surface are The cutting surface 4 intersects to form a cutting edge 15. On the drill bit 2 of the compound cutting, it is integrated, or connected and formed as a whole to carry out the setting of the following technical solutions. On the inner side of the cutting surface 3 facing the cutting direction, through The arc-shaped protrusion or oblique protrusion...

Embodiment approach 2

[0040] Such as figure 2As shown, the drill bit of the compound cutting of the second embodiment of the present invention, on the basis of the first embodiment, the cutter head 1 of the present invention is integrally provided with the cutting bit 2 on both sides, the cutting bit 2 The surface facing the cutting direction is the cutting surface 3, the top back side of the cutting surface 3 is the rear cutting surface 4, the outermost surface of the cutting bit 2 is the secondary cutting surface 5, and the cutting surface 3 and the rear cutting surface 4 intersect to form a cutting surface. The cutting edge is provided with a notch edge 14 on the cutting edge, and a groove 13 is formed extending to the rear cutting surface 4. The inner side of the cutting surface 3 protrudes and forms a composite cutting surface. The outermost cutting surface is an anti-crack splitting table 15 , the raised cutting surface is a high-efficiency cutting table, an arc-shaped protrusion or an obliq...

Embodiment approach 3

[0043] Such as image 3 Shown, the compound cutting drill bit of the third embodiment of the present invention, on the basis of the first-second embodiment, the cutter head 1 of the present invention is integrally provided with cutting bits 2 at least on opposite sides, The surface facing the cutting direction of the cutting bit 2 is the cutting surface 3, the top and back side of the cutting surface 3 is the rear cutting surface 4, and the outermost surface of the cutting bit 2 is the secondary cutting surface 5, and the cutting surface 3 and the rear cutting surface 4 intersect to form a cutting edge 15, the inner axial center of the cutting surface 3 starts to form a one-stage or multi-stage positioning platform 6 in a manner that the height gradually decreases toward the outside, and the first-stage positioning of the outermost arc-shaped protrusion or oblique protrusion The platform is a reinforced platform, and the composite cutting surface 7 with arc-shaped or oblique p...

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PUM

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Abstract

The invention provides a combination cutting drill tool bit with high efficiency, low cost, long service life, and easiness in positioning during drilling and cutting. The combination cutting drill tool bit comprises a tool bit body, and is characterized in that the relation between the height of an anti-crack slitting table or an efficient slitting table and that of an adjacent efficient slitting table on an inner side is defined; the included angle between a combination cutting surface and an adjacent combination positioning decomposing table is larger than or equal to 90 degrees, the heights of adjacent combination cutting surfaces are larger than or equal to 0.01mm, smaller than four fifths of the thickness of discharged chips, or smaller than or equal to nine times of the height of the cutting feed amount, the width of the anti-crack slitting table is larger than 0.6 mm, or smaller than or equal to one third of the diameter of the tool bit, or a spiral groove is formed in the combination cutting surface; at least one notched edge, one stepped edge, one flat edge, or one inclined edge is arranged on the drill tool bit, or a drill tip is arranged in the center of the drill tool bit.

Description

Technical field: [0001] The invention relates to a compound cutting drill head, which is used in mechanical processing and fitter maintenance. manual Background technique: [0002] At present, the twist drills used in mechanical processing are composed of chisel edge, cutting edge, helical secondary edge, and side edge. The cutting edge and secondary edge generally have a single structure, and the centering structure is poor. A large amount of heat is easily generated when (milling) a workpiece with higher hardness, which causes the hardness of the cutter head to decrease, causing the wear of the cutter head. It is symmetrical when working, and the cutting amount is generally only tens of microns to 1 mm, so it is difficult to grasp the angle and height during manual grinding. In addition, the precision of these twist drills and the processed holes is unqualified, which is easy to Waste products occur, and at the same time, when processing thinner workpieces, there is also...

Claims

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Application Information

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IPC IPC(8): B23B51/00
Inventor 李仕清
Owner 山东新工刀具有限公司