# US 2013/0280993 A1 · Scattering prevention structure of grinding machine

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- Number: US 2013/0280993 A1
- Document ID: US20130280993A1
- Status: Published application
- Kind: A1
- Application number: 13/997,090
- Filed: 2011-12-21
- Published: 2013-10-24
- Earliest claimed: 2010-12-24
- Assignees: Komatsu Ntc Ltd.
- Inventors: Kazunori Michiyoshi; Kazuya Kogura
- Web page: https://patentgrep.com/patent/US20130280993A1

## CPC

- B24B 55/04: Protective covers for the grinding wheel
- B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS

## Abstract

This scattering prevention structure of a grinding machine has: a pair of supporting tables; an X axis saddle, which supports a grinding head such that the grinding head can freely move in the advancing/retracing direction with respect to a workpiece; a Z axis saddle, which supports the X axis saddle such that the X axis saddle can freely move in the rotating axis direction of the workpiece; and a grinding stone cover. The grinding stone cover is fixed to the Z axis saddle such that the grinding stone cover opens in a machining region, and the grinding stone head can freely move, with respect to the grinding stone cover, in the advancing/retracting direction with respect to the workpiece, by having the accordion cover therebetween. With this configuration, the size of the machining chamber is reduced, and shielding performance is improved.

## Claims

### Claim 1

A scattering prevention structure that covers a machining region of a grinding machine having a pair of supporting tables that is disposed facing each other and rotatably supports a workpiece, a grinding stone table having a grinding stone head that rotatably supports a grinding stone, an X axis saddle that movably supports the grinding stone table along an advancing/retracting direction with respect to the workpiece, a Z axis saddle that movably supports the X axis saddle along a rotating axis direction of the workpiece, and a grinding stone cover that covers the grinding stone, the scattering prevention structure comprising:
a first fixing cover and a second fixing cover that are respectively attached to sides where the respective supporting tables face each other;
a Z axis shielding cover that shields the first fixing cover, the second fixing cover, and the grinding stone cover one from another and has the grinding stone cover attached thereto such that the grinding stone cover is movable in the rotating axis direction of the workpiece; and
an X axis shielding cover that is attached to the grinding stone cover such that the grinding stone head having the grinding stone attached thereto fits in the X axis shielding cover, shields the grinding stone head and the grinding stone cover one from the other, and has the grinding stone head attached thereto such that the grinding stone head is movable in the advancing/retracting direction with respect to the workpiece, wherein
the machining region is covered by the first fixing cover, the second fixing cover, and the Z axis shielding cover to form a machining chamber,
the grinding stone cover is fixed to the Z axis saddle such that the grinding stone cover opens into the machining chamber, and
the grinding stone head is movable relative to the grinding stone cover via the X axis shielding cover in the advancing/retracting direction with respect to the workpiece.

### Claim 2 (depends on 1)

The scattering prevention structure according to claim 1, wherein
the X axis shielding cover is an accordion cover.

### Claim 3 (depends on 1)

The scattering prevention structure according to claim 1, wherein
the Z axis shielding cover is a fixing cover made of a flat plate.

### Claim 4 (depends on 1)

The scattering prevention structure according to claim 1, wherein
the grinding stone cover has a sizing device attached thereto, the sizing device measuring a grinding portion of the workpiece.

### Claim 5 (depends on 4)

The scattering prevention structure according to claim 4, comprising:
moving means for reciprocating the sizing device in the advancing/retracting direction with respect to the workpiece.

### Claim 6 (depends on 2)

The scattering prevention structure according to claim 2, wherein
the Z axis shielding cover is a fixing cover made of a flat plate.