Multifunctional ball endmill

A ball-end milling cutter, multi-functional technology, applied in milling cutters, milling cutting inserts, milling machine equipment, etc. Surface quality, good machined surface quality, light cutting effect

Active Publication Date: 2019-01-25
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the structure of the ball end milling cutter is simple, but limited by the process, the single ball cutting edge has constant structural parameters such as rake angle and relief angle.
Since the main cutting part of the ball end milling cutter is the ball end cutting edge part, the ball cutting edge starts from the central axis with zero diameter and ends at the largest diameter column cutting edge, the cutting speed of the ball cutting edge is quite different, especially in the center The cutting line speed is basically zero, and the cutting edge in the central area wears rapidly and is prone to chipping during cutting. The strength of the central cutting edge can be improved by opt

Method used

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  • Multifunctional ball endmill
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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] Such as Figure 1 to Figure 6 As shown, the multifunctional ball-end milling cutter of this embodiment includes a cutting portion 100, a loading and unloading portion 300, and a connecting portion 200 for connecting the cutting portion 100 and the loading and unloading portion 300. The cutting portion 100 has a central axis 101, and the cutting portion 100 includes An inner ball cutting edge 110 and at least one outer ball cutting edge 120. The inner ball cutting edge 110 intersects the central axis 101 and is rotationally symmetrical about the central axis 101. Two outer ball cutting edges 120 of each outer ball cutting edge 120 are about the center The shaft 101 is rotationally symmetrical, and there is a certain radial distance between the outer spherical cutting edge 120 and the central axis 101. The inner spherical cutting edge 110 rotates about the central axis 101 to form a spherical surface and the outer spherical cutting edge 120 rotates about th...

Example Embodiment

[0051] Example 2

[0052] Such as Figure 7 to Figure 9 As shown, the multifunctional milling cutter of this embodiment is basically the same as that of embodiment 1, except that:

[0053] In this embodiment, the connecting edge 130 and the outer ball cutting edge 120 have the same structure, and they are rotationally symmetrical about the central axis 101. That is, the connecting edge 130 is milled like the outer ball cutting edge 120. The chip flute 400 is formed by the area between the connecting edge 130 and the outer ball cutting edge 120. The connecting edge 130 and the outer ball cutting edge 120 have the same structure, so the four chip flutes 400 have the same structure. That is, in this embodiment, the cutting edge is divided into one inner ball cutting edge 110 and four outer ball cutting edges 120. There is a transition cutting edge 150 with a smooth transition between the connecting edge 130 and the inner ball cutting edge 110. The outer ball cutting edge 120 is co...

Example Embodiment

[0055] Example 3

[0056] Such as Picture 10 with Picture 11 As shown, in the multifunctional ball end mill of this embodiment, the cutting portion 100 includes an inner ball cutting edge 110 and an outer ball cutting edge 120. The inner ball cutting edge 110 intersects the central axis 101, and the intersection point cuts the inner ball The edge 110 is divided into two sections. One is longer than the other. There is a certain radial distance between the outer spherical cutting edge 120 and the central axis 101. The inner spherical cutting edge 110 has a longer length and a spherical surface formed by rotating about the central axis 101. The spherical surface formed by the rotation of the spherical cutting edge 120 about the central axis 101 intersects, the spherical radius of the inner spherical cutting edge 110 is r, and the spherical radius of the outer spherical cutting edge 120 is R, which satisfies: 5R≤r≤15R.

[0057] In this embodiment, there is a connecting edge 130 betw...

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PUM

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Abstract

The invention discloses a multifunctional ball endmill which includes a cutting portion, an assembly and disassembly portion and a connecting portion for the cutting portion, the assembly and disassembly portion. The cutting portion includes an inner ball cutting edge and at least one pair of outer ball cutting edges. The inner ball cutting edge and a central shaft are cross and are rotatably symmetric with respect to the central shaft, two outer ball cutting edges in each pair of outer ball cutting edges are rotatably symmetric with respect to the central shaft, a radial spacing is reserved between the outer ball cutting edges and the central shaft, a spherical surface formed by the inner ball cutting edge rotating with respect to the central shaft and a spherical surface formed by the outer ball cutting edge rotating with respect to the central shaft are cross, the spherical surface radius of the inner ball cutting edge is r, and the spherical surface radius of the outer ball cuttingedge is R, meeting: 5R<=r<=15R. The spherical surface radius of the inner ball cutting edge is far greater than that of the outer ball cutting edge, and when performing cavity large feeding cutting or flat surface copy milling, the endmill has a low radial load and high cutting efficiency.

Description

Technical field [0001] The invention relates to a metal cutting tool, in particular to a multifunctional ball-end milling cutter. Background technique [0002] General solid carbide ball end mills are mainly used for profiling, cavity and ball groove machining. The cutting part of ordinary ball end mills is mainly composed of ball cutting edges or ball cutting edges and column cutting edges. In order to ensure the ball cutting edge The integrity of the profiling processing capability, when at least one ball cutting edge rotates around the central axis for cutting, the cutting spherical surface is not less than half a spherical surface. In order to make the cutting edge feed of the ball end milling cutter uniform and stable, the single ball cutting edge of the ball end mill adopts a continuous cutting edge structure, and all the ball cutting edges on the ball end mill are distributed around the central axis The diameter of is constant and completely coincides on the same spherica...

Claims

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Application Information

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IPC IPC(8): B23C5/10
CPCB23C5/1018B23C2200/088
Inventor 江爱胜吴火飞李屏汤爱民倪兰薛俊波
Owner ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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