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Sawing bead

A technology of sawing wire and metal sleeve, applied in the field of beads used on sawing wire, can solve the problem of difficult to evenly distribute abrasive particles

Active Publication Date: 2013-11-27
NV BEKAERT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] - "Particle distribution problem", i.e. difficulty in getting the abrasive particles evenly distributed in the abrasive coating

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0116] In the following, only the most preferred modes for carrying out the invention are described, since many experiments had to be carried out before these conditions could be achieved.

[0117] In a series of trials, the following types of equipment are used:

[0118] ■Laser cladding system

[0119] - "Laserline LDF 3kW" diode laser with a wavelength of 1030 microns operating at 1300W in continuous mode.

[0120] - "Balliu" laser gun with coaxial powder feeding manufactured by Laserline Ltd;

[0121] -Medicoat Duo powder hopper

[0122] - Gas supply: argon.

[0123] Both the metal matrix material and the abrasive grains were fed through the same flow of argon. With the laser gun in the vertical position, the laser beam and associated air flow is in a downward direction.

[0124] ■The laser cladding system can be moved along the axis of the lathe at a speed of up to 3.2mm / s.

[0125] The feed rate of the particles was kept constant in all subsequent experiments, resul...

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Abstract

A sawing bead for use in a sawing cord is described and claimed. Sawing cords are used for cutting of natural stone and rock or manmade concrete and brickwork. The sawing bead comprises a tubular metallic sleeve on which an abrasive layer is deposited. The abrasive layer comprises a metal matrix material in which abrasive particles are held. Special about the bead is that the metal matrix material shows a dentritic structure in a metallographic cross section which is a result of the way it has been produced namely by laser cladding. The abrasive layer adheres very well to the sleeve as a metallurgical bonding layer is present between the abrasive layer and the sleeve. Abrasive particles are present down to this bonding layer thereby improving the useful life of the bead as no brazing layer is present between abrasive layer and sleeve as in prior-art beads. In the metal matrix material active metals are present that enhance the wetting and adhesion of the abrasive particles. Single bead cutting tests show at least as good a performance with the inventive beads compared to existing beads.

Description

technical field [0001] The present invention relates to a bead for use on a saw wire. The saw wire is used for cutting hard and brittle materials such as natural stone (marble, granite, rock...), artificial stone (concrete, brick...), composite or crystalline materials (monocrystalline or polycrystalline silicon). Background technique [0002] Beads formed by embedding diamond particles in an outer abrasive layer of a metal matrix appear to have been first disclosed in the early 1950s (see eg US 2,679,839 filed 1952). The beads are strung on steel wires and separated by springs (see US 2,679,839) or by plastic material (see eg FR 1.203.000 filed 1958). It is also possible to inject plastic material between the beads by means of a mold (FR 1.203.000 filed in 1959, first edition). Fixing the wire directly to the wire rope, for example by pins (GB 759,505 filed 1953), by brazing (FR 1,265,542 first filed 1960) or by swaging (US 3,598,101 first filed 1968) has also been explor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23D61/18B23D65/00B28D1/08
CPCB28D1/124B23D65/00B23D61/185B23D61/18B28D1/08B23K26/342
Inventor J·瓦内科克R·格勒嫩T·贝克兰特
Owner NV BEKAERT SA