# US 5,699,782 A · Wire saw apparatus

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- Number: US 5,699,782 A
- Document ID: US5699782A
- Status: Granted
- Kind: A
- Application number: 08/654,823
- Filed: 1996-05-28
- Granted: 1997-12-23
- Earliest claimed: 1995-05-31
- Assignees: Shin-Etsu Handotai Co., Ltd.
- Inventors: Kouhel Toyama
- Web page: https://patentgrep.com/patent/US5699782A

## CPC

- B23D 57/0053: {of drives for saw wires; of wheel mountings; of wheels}
- B24B 27/0633: {using a cutting wire}
- B28D 5/045: {by cutting with wires or closed-loop blades (B28D5/042 takes precedence)}
- B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q)
- 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
- B28D: WORKING STONE OR STONE-LIKE MATERIALS

## Abstract

A wire saw apparatus which improves the flatness of cut work and reduces the wire disconnection occurrence rate, is disclosed. The wire saw apparatus comprises: a wire supply part for supplying a cutting wire to a cutting part, which includes a wire supply reel bobbin; the cutting part for cutting a work, including a roller with grooves around which the cutting wire is wrapped; and a wire take-up part for taking up the cutting wire from the cutting part, which includes a wire take-up reel bobbin; wherein the dynamic balance of each of the wire supply reel bobbin, the roller with grooves, and the wire take-up reel bobbin is taken so that the quantity of unbalance thereof is not larger than 5 g.multidot.cm.

## Claims

### Claim 1

A wire saw apparatus comprising:
a wire supply part for supplying a cutting wire to a cutting part, which includes a wire supply reel bobbin;
the cutting part for cutting a work, including a roller with grooves around which the cutting wire is wrapped; and
a wire take-up part for taking up the cutting wire from the cutting part, which includes a wire take-up reel bobbin;
wherein each of the wire supply reel bobbin, the roller with grooves, and the wire take-up reel bobbin is dynamically balanced so that the quantity of dynamic imbalance thereof is not larger than 5 g.multidot.cm.

### Claim 2 (depends on 1)

A wire saw apparatus as claimed in claim 1, wherein each of the wire supply reel bobbin, the roller with grooves, and the wire take-up reel bobbin is dynamically balanced so that the quantity of dynamic imbalance thereof is not larger than 3 g.multidot.cm.

### Claim 3 (depends on 1)

A wire saw apparatus as claimed in claim 1, wherein the cutting part comprises three rollers with grooves which are arranged in an approximately triangular configuration, to form a cutting region by wrapping the cutting wire around the three rollers with grooves, to form a number of wire lines with a predetermined pitch, and each of the rollers with grooves is dynamically balanced so that the quantity of dynamic imbalance thereof is not larger than 5 g.multidot.cm.

### Claim 4 (depends on 1)

A wire saw apparatus as claimed in claim 1, wherein a first tension adjusting mechanism for adjusting a first tension of the cutting wire is disposed between the wire supply part and the cutting part, and a second tension adjusting mechanism for adjusting a second tension of the cutting wire is disposed between the cutting part and the wire take-up part.

### Claim 5 (depends on 1)

A wire saw apparatus as claimed in claim 1, wherein a speed of the cutting wire relative to the work is not less than 400 m/min.

### Claim 6 (depends on 1)

A wire saw apparatus as claimed in claim 1, wherein the vibration of the apparatus is not larger than 10 .mu.m in terms of peak-to-valley value.

### Claim 7 (depends on 1)

A wire saw apparatus as claimed in claim 1, wherein the disconnection occurrence rate of the apparatus is not more than 5%.

### Claim 8

A wire saw apparatus comprising:
cutting means for cutting a work, including a plurality of rollers with grooves;
wire supply means for supplying a cutting wire to the cutting means, the cutting wire being wrapped around the plurality of rollers; and
wire take-up means for taking up the cutting wire from the cutting means,
wherein the quantity of each dynamic imbalance of the wire supply means, the rollers with grooves, and the wire take-up means is not larger than 5 g.multidot.cm.