Self-cooling technology of machined spiral groove twist drill and machining method thereof

A technology of spiral grooves and processing methods, which is applied to twist drills, metal processing equipment, parts of boring machines/drilling machines, etc., can solve problems such as inability to achieve cooling effects, twist drills are not durable, and the hardness of the cutter head is reduced, so as to save energy. resources, improve efficiency, and reduce the effect of cutting resistance

Inactive Publication Date: 2014-09-24
李仕清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the twist drill used in mechanical processing is composed of chisel edge, cutting edge, helical minor cutting edge, and side edge. The cutting edge and helical minor cutting edge are roughly in a single structure, with poor centering structure and protruding to the outside of the helical surface. Parts are easy to break, these twist drills are extremely undurable, especially when drilling and milling workpieces with high hardness, a large amount of heat is generated, resulting in a decrease in the hardness of the cutter head, resulting in wear of the cutter head, and the cooling technology becomes the bottleneck of the tool use , it is difficult to inject the coolant directly into the cutting place with ordinary technology, and the ideal cooling effect cannot be achieved.

Method used

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  • Self-cooling technology of machined spiral groove twist drill and machining method thereof
  • Self-cooling technology of machined spiral groove twist drill and machining method thereof
  • Self-cooling technology of machined spiral groove twist drill and machining method thereof

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Embodiment approach 1

[0038] Such as figure 1 , Figure 6-Figure 9 , Figure 10-Figure 13 As shown, the self-cooling technology and processing method of the machine-added spiral groove twist drill of the first embodiment of the present invention mainly relate to the machine-added twist drill for mechanical processing, wherein, Figure 7 The drill point in the axial center is not chamfered, so the chisel edge is larger and the cutting resistance is also larger. Figure 8 Although the drill point in the axial center is chamfered, there is still a reduced chisel edge, and the cutting resistance is relatively Figure 7 reduced a lot, Figure 9-Figure 10 After chamfering, the drill point in the axial center has become a sharp edge without a chisel edge, and the cutting resistance is the smallest. Figure 10-Figure 11 A cooling hole 16 is set on the tapered shank 12 and straight shank 12 of the twist drill, and the other end of the cooling hole 16 is integrated with the tapered shank 12 and the strai...

Embodiment approach 2

[0042] Such as figure 2 , Figure 6-Figure 9 , Figure 10-Figure 13 As shown in Embodiment 2, the self-cooling technology and processing method of the machine-added twist drill of the second embodiment of the present invention, on the basis of the first embodiment, the present invention is a step-shaped protrusion on the rear cutting surface 4 At least one level of stepped composite rear cutting surface 4 is provided, and the stepped composite rear cutting surface 4 intersects with the helical cutting surface 11 to form a stepped composite cutting edge 5 .

[0043] The step-like setting on the rear cutting surface 4 not only improves the cutting stability of the twist drill but also improves the efficiency, reduces the cost and saves resources.

[0044] According to the above structure, it has been proved that the effect of cooling the tool from the cutting place by the coolant is far greater than that achieved by flowing downward from the top. On the one hand, the waste c...

Embodiment approach 3

[0046] Such as image 3 , Figure 6-Figure 9 , Figure 10-Figure 13 As shown, the self-cooling technology and processing method of the machine-added twist drill of the third embodiment of the present invention, on the basis of the first-second embodiment, the present invention is mainly provided with at least one notch on the cutting edge 5 The edge 50 extends toward the rear cutting surface 4 to form a groove 51 .

[0047] By arranging the notch edge 50 on the cutting edge 5, the cutting resistance of the cutting edge 5 is broken down, the cutting efficiency is greatly improved, the cost is reduced, and resources are saved.

[0048] According to the above structure, it has been proved that the effect of cooling the tool from the cutting place by the coolant is far greater than that achieved by flowing downward from the top. On the one hand, the waste chips cut by the tool also prevent the coolant from reaching the cutting place effectively, but the way of sending the coola...

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Abstract

The invention provides a self-cooling technology of a machined spiral groove twist drill and a machining method thereof and mainly relates to the machined spiral groove twist drill. The self-cooling technology of the machined spiral groove twist drill is characterized in that a screw pair cutting edge is arranged on each spiral strip; a screw pair cutting face is formed along the outer side of the screw pair cutting edge; a screw cutting face is formed at the front part, facing to the cutting direction, of the screw pair cutting edge; at least one spiral groove is formed in the screw cutting face; the face at the top of the front end of the screw cutting face of each spiral strip at the front end of the axial center of a tool head is a rear cutting face; the screw cutting face and the rear cutting face are crossed to form a cutting edge; the cutting edge is set to be a flat edge, an arc-shaped edge, or an oblique edge with an inclined angle with the screw pair cutting edge; a notch edge, or a trapezoidal edge is arranged on the inner side of the flat edge, the oblique edge or the arc-shaped edge, or a drill point, or a ladder-shaped drill point is arranged in the center of the cutting edge in a protruding manner; the face, corresponding to the screw cutting face, of the back side in the rotation direction of the machined spiral groove twist drill is a rear spiral surface, at least one spiral groove is formed in the rear spiral surface, or a spiral table is opened in each of two sides of the groove, or a water pipe is arranged in the spiral groove, or a sealing surface is arranged or welded on the spiral table, a hole which is communicated with the spiral groove or the water pipe is formed in the spiral groove or at the handle part of the top end of the spiral table, and a hole is formed in the top end or the handle of the handle part.

Description

Technical field: [0001] The invention relates to a self-cooling technology and a processing method of a machine-added spiral groove twist drill and a processing method thereof. The self-cooling technology and a processing method of the machine-added spiral groove twist drill are used in drilling machine processing and fitter maintenance. Background technique: [0002] At present, the twist drill used in mechanical processing is composed of chisel edge, cutting edge, helical minor cutting edge, and side edge. The cutting edge and helical minor cutting edge are roughly in a single structure, with poor centering structure and protruding to the outside of the helical surface. Parts are easy to break, these twist drills are extremely undurable, especially when drilling and milling workpieces with high hardness, a large amount of heat is generated, resulting in a decrease in the hardness of the cutter head, resulting in wear of the cutter head, and the cooling technology becomes th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/06B23B51/02
CPCB23B51/02B23B51/06
Inventor 李仕清
Owner 李仕清
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