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Ball end mill

A ball-end end mill and ball-end technology, applied in milling cutters, milling cutting inserts, milling machine equipment, etc., can solve the problems of small penetration and inability to perform cutting processing, and achieve the effect of low cutting resistance

Active Publication Date: 2021-08-31
UNION TOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the hemispherical ball end mills disclosed in Patent Document 1 and the like above, since there is no ball-end cutting edge, there is a problem that the amount of cut is extremely small and the cutting process is substantially impossible.

Method used

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  • Ball end mill
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Embodiment

[0043] Specific embodiments of the present invention will be described with reference to the drawings.

[0044] This embodiment is a ball end mill, such as figure 1 , figure 2 As shown, the ball end mill is formed with a plurality of chip discharge grooves 2 on the outer periphery of the tool body 1 from the end of the tool toward the base end side. Ball-end cutting edges 5, 6 are provided at the intersecting ridges where the end spherical surfaces 4 intersect, wherein the tool rotation center O of the ball-end mill exists on the end spherical surface 4, and the ball-end mill has Center-near ball-end cutting edges 5 set in such a way that the distance X between the point closest to the tool rotation center O of one of said ball-end cutting edges 5 when viewed at the tool end is greater than that of the other The distance Y between the point closest to the tool rotation center O of the ball-end cutting edge 6 and the tool rotation center O is small.

[0045] In this embodim...

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PUM

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Abstract

The present invention provides a ball end mill capable of performing both cutting and grinding well and having a small cutting resistance at the tip. A ball nose end mill, in which a plurality of chip discharge grooves (2) are formed on the outer periphery of a tool body (1) from the end of the tool toward the base end side, and on the rake face (3) of the chip discharge grooves (2) A ball-end cutting edge (5, 6) is provided at an intersecting ridgeline portion with the end spherical surface (4) of the tool body (1), wherein the tool rotation center (O) of the ball end mill exists at the end On the spherical surface (4), the ball nose end mill has a ball nose edge (5) near the center, which is set in such a way that when viewed from the end of the tool, a The distance (X) of the point closest to the tool rotation center (O) of the ball-end cutting edge (5) relative to the tool rotation center (O) is smaller than that of the other said ball-end cutting edges (6) closest to the tool rotation center ( O) the distance (Y) from the center of rotation (O) of the tool is small.

Description

technical field [0001] The present invention relates to ball nose end mills. Background technique [0002] In recent years, as a ball end mill, a ball end mill having a hemispherical end portion for the purpose of finishing has been proposed (see Patent Document 1, etc.). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2016-112678 Contents of the invention [0006] The problem to be solved by the invention [0007] However, in the hemispherical ball end mill disclosed in Patent Document 1 and the like, there is a problem that cutting is substantially impossible due to the extremely small amount of cut because there is no ball-end cutting edge. [0008] In addition, since there is no chisel edge at the tip, the cutting resistance at the tip increases, causing tool breakage and deterioration of the surface properties of the workpiece processed by the tip. [0009] The present invention solves the above-me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23C5/10
CPCB23C5/1009B23C2210/445B23C2210/203B23C2210/54B23C5/1018B23C2200/0427
Inventor 古盐纯一渡边英人
Owner UNION TOOL