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Rotary cutting tool

A cutting tool and tool technology, which is used in the manufacture of tools, drilling tool accessories, metal processing, etc., and can solve the problems of end edge defect, breakage, and inability to obtain sufficient chip evacuation.

Active Publication Date: 2010-02-24
UNION TOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When longitudinal feed machining is performed using an end mill having a conventional structure such as an end mill having the above-mentioned unequal end edge shape, it can be confirmed that chips are continuously generated and clogged in the groove between the above-mentioned end edges, Therefore, chipping and breakage of the end edge are prone to occur, and longitudinal feed processing cannot be efficiently performed, but the current situation is still unable to obtain sufficient chip removal.

Method used

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  • Rotary cutting tool
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] according to Figure 1 to Figure 11 A specific embodiment 1 of the present invention will be described.

[0055]Embodiment 1 is a rotary cutting tool in which a plurality of spiral chip flutes 2 are formed on the outer periphery of the front end portion of a substantially cylindrical tool body 1, and a rake surface 3 of the chip flutes 2 and the tool body The intersecting ridgelines of the front end relief surface of 1 are respectively provided with end edges, wherein at least one of the end edges is a cutting edge, and the part close to the outer peripheral side of the tool sinks in the axial direction of the tool body 1 to form a non-cutting edge. The structure of the non-cutting portion 22 is formed to the outer peripheral edge of the tool body 1 .

[0056] Specifically, as Figure 1 to Figure 3 As shown, Embodiment 1 is an end mill having the following structure, that is, the intersecting edge between the rake surface 3 (the wall facing the tool rotation direction...

Embodiment 2

[0080] based on Figure 12 to Figure 21 Specific Example 2 of the present invention will be described.

[0081] Example 2 is an example in which only the shape of the non-cutting portion 22 is different from Example 1, and the other parts are the same as Example 1. FIG.

[0082] That is, if Figure 12 to Figure 14 As shown, in Embodiment 2, the non-cutting portion 22 is sunk in the axial direction of the tool body 1 except for at least a part of the front end outer peripheral side of the tool body 1, so that the above-mentioned non-cutting portion 22 can be provided by the step portion 9. Chips cut by the end edge 6 of the portion 22, chips cut on the tool center side of the end edge 6, and chips cut on the tool outer peripheral side are broken.

[0083] Specifically, as Figure 15As shown, the concave angle β of the bottom surface 23 of the non-cutting portion 22 (inclination angle β with respect to the horizontal reference line L in the side view of the tool) is set to ha...

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PUM

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Abstract

To provide a highly practical rotary cutting tool with which chips can be satisfactorily removed even during longitudinal feeding, and the accumulation of chips can be minimized. A rotary cutting toolis provided, wherein a large number of helical chip-removing grooves (2) are provided in an external periphery of a distal end of a substantially cylindrical tool main body (1), and end cutting edgesare provided at the lines of intersection between the cutting faces (3) of the chip-removing grooves (2) and the distal-end flanks of the tool main body (1); and at least one of the end cutting edgesis configured so that the part of the cutting edge near the external periphery of the tool is recessed in the axial direction of the tool main body (1), forming a non-cutting part (22).

Description

technical field [0001] The present invention relates to a rotary cutting tool. Background technique [0002] In order to improve the chip removal performance of rotary cutting tools such as end mills, various proposals have been proposed. An end cutting edge is provided at an intersecting ridge line portion between the rake surface of the groove and the front end relief surface of the tool body. [0003] For example, in Japanese Unexamined Publication No. 63-131313 (Patent Document 1), a technology related to the shape of the so-called unequal end blade is disclosed. Of the end edges, the tool center side of a pair of end edges is cut off so that the cutting edge is shorter than the remaining end edges. [0004] Patent Document 1: Japanese Utility Model Publication No. 63-131313. [0005] When longitudinal feed machining is performed using an end mill having a conventional structure such as an end mill having the above-mentioned unequal end edge shape, it can be confirmed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23C5/10
CPCB23B2270/30B23B2251/18B23B51/02B23C2210/086B23C2230/04B23C2210/54B23B2251/14B23C5/10Y10T407/1948Y10T407/245B23C5/00
Inventor 佐藤彰高桥昭一古塩纯一
Owner UNION TOOL