Side milling cutter for slot cutting

Patent metadata

Field	Value
Publication number	US-9919365-B2
Application number	US-201414574835-A
Country	US
Kind code	B2
Filing date	Dec 18, 2014
Priority date	Dec 18, 2013
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

A side milling cutter for slot cutting is provided whose vibration can be damped even in cases where a vibration mode of the cutter generates plural nodes in a cutting part. A side milling cutter for slot cutting of the present invention includes a disc-shaped cutter and a plurality of cartridges as cutting edges provided at a predefined interval in a circumferential direction along an outer circumference of the disc-shaped cutter. The disc-shaped cutter cuts a predefined slot on a workpiece using the cartridges by circumferentially rotating. The disc-shaped cutter internally includes a plurality of vibration damping structures in the circumferential direction on a disk surface of the disc-shaped cutter.

First claim

What is claimed is:

1. A side milling cutter for slot cutting comprising:
a disc-shaped cutter; and
a plurality of cartridges as cutting edges provided at a predefined interval in a circumferential direction along an outer circumference of the disc-shaped cutter;
wherein the disc-shaped cutter cuts a predefined slot on a workpiece using the cartridges by circumferentially rotating, wherein
the disc-shaped cutter internally includes a plurality of vibration damping structures in the circumferential direction on a disc surface of the disc-shaped cutter,
each of the vibration damping structures includes viscoelastic bodies and a weight between the viscoelastic bodies,
the weight is configured to be able to move in a direction to cancel a vibration mode of the disc-shaped cutter, the vibration mode being a mode in which an outer peripheral portion of the disc-shaped cutter vibrates undulating in an axis direction,
the disc-shaped cutter has a disc-shaped cutter body,
the plurality of cartridges are provided at the predefined interval in the circumferential direction along the outer circumference of the disc-shaped cutter body,
inserts are attached to the plurality of cartridges,
a shaft that is connected to the disc-shaped cutter body on a disc surface of the disc-shaped cutter body, the shaft rotating the disc-shaped cutter body, and
the vibration damping structures are inserted into the disc-shaped cutter body in an area of the disc-shaped cutter body that is most distant from the shaft along a radially outward direction from the shaft,
the disc-shaped cutter includes a disc-shaped cutter body,
each of the vibration damping structures includes a weight; viscoelastic bodies for damping vibration of the cutter, disposed on both surfaces of the weight; a shim for adjusting pressure applied to one of the viscoelastic bodies, disposed on a surface of the one of the viscoelastic bodies; and a cover to hold the shim, the viscoelastic bodies, and the weight in the cutter body,
each of the vibration damping structures is placed in a vibration damper hole formed on an outer or inner circumference side of the cutter body or in a cutting part of the cutter body,
the weight has a groove on a side surface of the weight, and
a ring-shaped viscoelastic body is placed in the groove.

2. The side milling cutter for slot cutting according to claim 1 ,
wherein each of the vibration damping structures is internally included in a cutting part of the cutter body.

3. The side milling cutter for slot cutting according to claim 1 ,
wherein each of the vibration damping structures has a through-hole formed at a center of the weight,
wherein each of the vibration damping structures includes a rod and a linear bushing through the through-hole, the rod fixed to the cover and the cutter body,
wherein the rod and the linear bushing are configured to prevent interference between the weight and the cutter body caused by centrifugal force, and
wherein the weight is configured to be able to move in a direction to damp vibration of the cutter body.

4. The side milling cutter for slot cutting according to claim 1 ,
wherein each of the vibration damping structures has a through-hole formed at a center of the weight and at centers of the viscoelastic bodies,
wherein each of the vibration damping structures includes a bolt or a screw through the through-hole, and
wherein pressure applied to the viscoelastic bodies is adjusted by clamping of the bolt or the screw.

5. The side milling cutter for slot cutting according to claim 1 ,
wherein each of the vibration damping structures is screwed to the cutter body via the cover.

6. The side milling cutter for slot cutting according to claim 1 ,
wherein each of the vibration damping structures includes a weight made of ferrous metal or tungsten alloy.

7. A side milling cutter for slot cutting comprising:
a disc-shaped cutter having a disc-shaped cutter body,
a shaft connected to the disc-shaped cutter body on a disc surface of the disc-shaped cutter body, the shaft rotating the disc-shaped cutter body; and
a plurality of cartridges as cutting edges provided at a predefined interval in a circumferential direction along an outer circumference of the disc-shaped cutter, inserts being attached to the plurality of cartridges;
wherein the disc-shaped cutter cuts a predefined slot on a workpiece using the cartridges by circumferentially rotating, wherein
the disc-shaped cutter internally includes a plurality of vibration damping structures in the circumferential direction on a disc surface of the disc-shaped cutter, the vibration damping structures are inserted into the disc-shaped cutter body that is most distant from the shaft along a radially outward direction from the shaft,
each of the vibration damping structures includes viscoelastic bodies for damping vibration of the cutter and a weight between the viscoelastic bodies,
the weight is configured to be able to move in a direction to cancel a vibration mode of the disc-shaped cutter, the vibration mode being a mode in which an outer peripheral portion of the disc-shaped cutter vibrates undulating in an axis direction,
a shim for adjusting pressure applied to one of the viscoelastic bodies is disposed on a surface of one of the viscoelastic bodies; and a cover holds the shim, the viscoelastic bodies and the weight in the cutter body,
a through-hole is formed at a center of the weight, a rod and a linear bushing pass through the through-hole, the rod being fixed to the cover and the cutter body,
the rod and the linear bushing are configured to prevent interference between the weight and the cutter body caused by centrifugal force.

Assignees

• Mitsubishi Hitachi Power Sys
• Sumitomo Electric Hardmetal Corp
• Misubishi Hitachi Power Systems Ltd

Inventors

• Miyamoto Takayuki
• Nishikawa Kenji
• Kono Ippei
• Hirai Junichi
• Kawakami Masanori
• Kanamaru Nobuhisa
• Tohkairin Hitoshi

Classifications

• Y10T407/1942

  Peripherally spaced tools · CPC title

• B23C5/006

  Details of the milling cutter body · CPC title

• B23C2260/04

  Adjustable elements · CPC title

• B23C5/08

  Disc-type cutters · CPC title

• B23C2250/16

  Damping vibrations · CPC title