Chattering vibration inhibiting mechanism of machine tool

• US 7,690,872 B2
• Filed: 03/21/2007
• Issued: 04/06/2010
• Est. Priority Date: 04/04/2006
• Status: Active Grant

• Current Assignee: MORI Seiki Company Limited
• Original Assignee: MORI Seiki Company Limited
• Inventors: Hoshi, Takashi, Fukunaga, Osamu, Hashimoto, Kazutada
• Primary Examiner(s): Howell; Daniel W
• Application Number:
  US11/723,746
• Publication Number:
  US 20070243033A1
• Time in Patent Office: 1,112 Days
• Field of Search: 409/141, 409/235, 409/231, 408/234, 188378-380, 267/137, 267/140.5
• US Class Current: 409/141
• CPC Class Codes: B23Q 11/0035 by adding or adjusting a mass, e.g. counterweights
• CPC Class Codes: B23Q 2220/006 Spindle heads
• CPC Class Codes: Y10T 409/304312 with means to dampen vibration

Abstract

A chattering vibration inhibiting mechanism capable of inhibiting chattering vibration of a machine tool without increasing weight nor requiring a time-consuming adjustment work is provided. A box-shaped package body 21 attached to a spindle head 6, a supporting member 22 disposed to bridge between front and rear walls 21a, 21b in the box-shaped package body 21, and a damper 23 composed of an elastic member 27 and a weight 26 supported by the supporting member 22 are provided.

Claims

1. A chattering vibration inhibiting mechanism of a machine tool designed to inhibit chattering vibration caused in machining by the machine tool provided with a spindle head supporting a spindle equipped with a tool in a rotatable manner, comprising:

a box-shaped package body attached to said spindle head;

a supporting member disposed in said box-shaped package body; and

a damper composed of an elastic member and a weight which are supported by said supporting member;

wherein said supporting member is disposed to bridge mutually facing walls of said box-shaped package body to make an axis line thereof be in parallel with a spindle axis of said spindle head, and

wherein said damper is composed of a weight in a plate shape and a pair of elastic members in a plate shape fixed to both surfaces of the weight, attached to said supporting member, and fixed to said supporting member by a pair of double nuts screwed with said supporting member, and an attaching position of said damper in the axial direction of said supporting member is adjusted by fastening or loosening the double nuts.

2. The chattering vibration inhibiting mechanism of the machine tool according to claim 1,

wherein said box-shaped package body is disposed on an end surface of said spindle head opposite to an end surface equipped with the tool.

3. A chattering vibration inhibiting mechanism of a machine tool caused when machining with the machine tool, the machine tool being provided with a spindle head supporting a spindle equipped with a tool in a rotatable manner, comprising:

a box-shaped package body attached to the spindle head;

a supporting member disposed in said box-shaped package body; and

a damper comprising a substantially rectangularly shaped weight and a pair of elastic members disposed on both main surfaces of said weight, said damper being supported by said supporting member;

wherein said supporting member is disposed through mutually facing walls of said box-shaped package body so that a longitudinal axis of said supporting member is parallel with a rotational axis of the spindle head;

wherein said damper is attached to said supporting member by a pair of double nuts screwed on said supporting member; and

wherein a position of said damper on said supporting member is adjustable by loosening and tightening said pair of double nuts.

4. The chattering vibration inhibiting mechanism as defined in claim 3, further comprising a further elastic member disposed between said weight and said supporting member.