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Vibration-damping cutting tool

一种切削工具、防振的技术，应用在工具夹、制造工具、车削设备等方向，能够解决成本低颤振等问题，达到制造成本削减、抑制效果高、实现容易化的效果

Active Publication Date: 2009-06-24
SUMITOMO ELECTRIC HARDMETAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The object of the present invention is to provide an anti-vibration cutting tool for a tool holder that can prevent vibration by causing the plane of the vibration-damping sheet to collide with the plane of the pocket groove, which can solve the problems that can be found in the existing anti-vibration cutting tools , the cost is low and the effect of suppressing chatter is extremely remarkable. In addition, it can handle a wide range of machining diameters or a wide range of cutting conditions with a simple structure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Figure 6 One embodiment of the vibration-proof cutting tool of the present invention is shown. The illustrated tool is a boring tool, and a non-regrinding blade 7 is clamped with a clamping element 8 at the front end of the tool holder 1 in a freely removable manner. In the tool handle portion 2 of the tool holder 1, through electrical discharge machining, a hole penetrating from one side to the other side is opened, and the hole provided at the front end side of the tool holder 1 is used as a bag groove 4, and in this A cuboid damper piece 5 made of cemented carbide with a specific gravity of 15.1 is inserted into the pocket 4 , and both ends of the pocket 4 are sealed with covers 6 to prevent the damper 5 from flying out. The pocket pocket 4 is a pocket pocket with a rectangular cross section at right angles to the axis, and has wall surfaces 4a, 4b arranged in parallel. The shank part 2 of the tool holder 1 shows a shank part with a circular cross-section in the d...

Embodiment 2

[0099] Figure 9 Indicates an effective method when placing emphasis on machining accuracy. Figure 6 The tool can enlarge the vibration damping piece 5, and it is easy to improve the effect of suppressing chatter, but on the contrary, because the pocket groove 4 penetrates the handle part 2, so the rigidity of the tool holder 1 decreases, and the tendency to decrease the machining accuracy becomes high. Figure 9 Anti-vibration cutting tools can solve this problem.

[0100] Should Figure 9 In the anti-vibration cutting tool, pocket pockets 4 are provided on the shank portion 2 by machining with an end mill from the side surface 1a opposite to the side on which the cutting edge 7a is disposed. Both ends of the pocket 4 have an arc shape by transferring the outer diameter of the end mill. In addition, in order to prevent the rigidity of the tool holder 1 from being lowered, the pocket 4 has a structure such that the side surface on the side where the tool tip 7a is placed 1...

Embodiment 3

[0111] Figure 14 shows another embodiment. Should Figure 14 The anti-vibration cutting tool, the tool holder 2 and the tool head 3 of the tool holder 1 were made separately, and the two were combined into one body. The cutter head 3 may be combined so that it cannot be removed from the handle 2, or it may be detachably connected so that it can be replaced and repaired when the cutter head 3 is damaged.

[0112] This structure is formed by opening the pocket 4 at the front end of the shank 2 , and by inserting the damping sheet 5 into the pocket 4 , the bit 3 functions as a cover. Therefore, a dedicated cover can be omitted. In addition, if the pocket 4 is formed by electric discharge machining or the like, the shank portion 2 can be formed of cemented carbide, and a vibration-proof cutting tool for inner diameter machining with high rigidity and an extremely high chatter suppression effect can be obtained.

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Abstract

An object of the present invention is to provide a low-cost anti-vibration cutting tool with an extremely remarkable effect of suppressing chatter, and having a tool holder capable of handling a wide range of machining diameters or a wide range of cutting conditions with a simple structure. A pocket groove (4) is provided on the knife handle (2) of the knife holder (1), and a vibration damping sheet (5) is inserted into the pocket groove (4) so ​​that it can move relative to the knife holder (1) and cannot Flying out, the damping sheet (5) receives kinetic energy from the tool holder during cutting and alternately impacts on the inner walls (4a, 4b) of the opposite positions of the pocket groove, and the impact is in the form of surface contact, line contact at multiple places, or Point contact occurs at multiple places, thereby damping the vibration of the tool holder.

Description

technical field [0001] The present invention relates to a vibration-proof cutting tool capable of effectively attenuating chatter vibrations with a simple and inexpensive structure, mainly in cutting operations where chatter vibrations are a problem. Background technique [0002] A method of incorporating a damper or the like into a holder and controlling chatter vibration by using inertia is well known. In particular, in a boring tool for machining an inner diameter, since the size of the toolholder is limited by the hole diameter of the workpiece, the protrusion has to be increased with a thin shank, and chattering tends to occur. Therefore, the prior art of anti-vibration cutting tools is mostly related to boring tools. Hereinafter, the boring tool will be mainly described as an example. [0003] For example, disclosed in the following patent document 1 Figure 5 The shown method, that is, drills a hole 21 from the rear end of the toolholder 1, arranges a shock absorber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B27/00B23B29/02B23B29/03B23B29/00B23B29/04
CPCY10T82/2585B23B29/022Y10T83/9319Y10T83/929B23B27/002B23B29/00B23B29/02B23B29/03B23B29/04
Inventor 村上大介上田正信鹿岛一彦冲田淳也木村则秀
Owner SUMITOMO ELECTRIC HARDMETAL CORP