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Clamping device of indexing device for machine tool

A technology of indexing device and clamping device, applied in positioning devices, machine tool parts, clamping and other directions, can solve the problems of inability to index the circular worktable, processing limitations, etc., and achieve the effect of simplified structure and firm clamping force

Inactive Publication Date: 2010-06-09
TSUDAKOMA KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the indexing angle depends on the number of indexing teeth, the indexing of the circular table at an arbitrary angle cannot be performed, and the processing is limited.

Method used

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  • Clamping device of indexing device for machine tool
  • Clamping device of indexing device for machine tool
  • Clamping device of indexing device for machine tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] figure 1 As an example of an indexing device for a machine tool to which the present invention is applied, a rotary table device 1 capable of arbitrarily indexing the rotation angle of a rotating shaft 2 serving as a main shaft is shown. and, figure 1 The illustrated rotary table device 1 is an example of a drive mechanism using a direct drive motor (hereinafter, referred to as "DD motor") 3 that does not use a reduction mechanism such as a gear as a drive source. However, the indexing device to which the present invention is applied may be configured to rotationally drive a worm wheel mounted on the rotating shaft (spindle) 2 in a relatively non-rotatable manner by a worm wheel provided on a drive shaft that is rotated by a drive motor or the like.

[0031] figure 1 The rotary table device 1 includes a circular table 4 on which a workpiece is mounted, a rotary shaft 2 supporting the circular table 4, a bracket 5 rotatably supporting the rotary shaft 2, and a DD motor...

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Abstract

The invention relates to a clamping device of an indexing device for a machine tool. The present invention is developed in light of the situations, and an object of the present invention is to provide a clamping device capable of providing indexing at a desired angle while providing a high rigidity and a large clamping torque. A clamping device for holding an indexed angular position of a main shaft includes a clamp section non-rotatable relative to the main shaft, and a pressing mechanism including a clamp piston displaceable in an axial direction of the main shaft and causing a fluid pressure received by the clamp piston to act on the clamp section. The clamp section includes a first clamp portion being non-rotatable relative to the main shaft, and a second clamp portion being rotatablewith the main shaft. The pressing mechanism includes first and second pressing portions which respectively press the first and second clamp portions. The second clamp portion or the second pressing portion is elastically displaced when the clamp piston advances by the fluid pressure. Forces in axial and radial directions are respectively applied to the first and second clamp portions, thereby clamping the main shaft.

Description

technical field [0001] The invention relates to a clamping device for an indexing device for a machine tool. Background technique [0002] Among the indexing devices used in machine tools, there are, for example, rotary table devices (also referred to as turntables and indexing tables). Furthermore, in order to maintain the angular position of the indexed main shaft in the rotary table device, a clamping device is generally provided. Conventionally, the following three methods are known as clamping devices for such rotary table devices. [0003] Socket clamping method. In this way, a sleeve is arranged relative to the main shaft around its outer periphery. Furthermore, the phase of the main shaft is maintained by supplying the working fluid to the outside of the sleeve to deform the thin portion of the sleeve to press the main shaft (Patent Document 1 - Japanese Patent Application Laid-Open No. 2006-35391). [0004] Disc clamping method. This method includes: a clamping...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q16/08B23Q16/10
CPCB23Q16/105B23Q16/102B23Q16/06B23Q2220/004B23Q16/021B23Q16/022B23Q1/25B23Q3/02
Inventor 西田阳一
Owner TSUDAKOMA KOGYO KK
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