Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1990-09-06
1992-06-16
Rachuba, M.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51 5B, 51 5C, 51 80A, 29 172, B24B 700
Patent
active
051215705
DESCRIPTION:
BRIEF SUMMARY
SUBJECT OF THE INVENTION
The present invention relates to a device for continuously grinding the edges of moving metal foils in strip form.
DISADVANTAGES OF THE SOLUTIONS OF THE STATE OF THE ART
It is known that rolled metal foil strips have irregularities on the edges, often referred to as edge serrations, which are essentially due to the burrs produced by shearing the edges after pickling and which are exaggerated by rolling.
The irregularities become increasingly pronounced as the rolling advances and the foil thicknesses get smaller.
In addition to the irregularities in the transverse direction of the metal foil strip, the latter often has burrs in the plane perpendicular to the main plane of the strip and mainly in the strips sheared while in motion.
This results in premature wear of the coating of the rollers for driving and supporting the metal foil strip owing to a shearing force exerted in the mass of said coating, which is often, in the case of prelacquering lines, made of rubber or of polyurethane of low hardness.
This premature wear is exaggerated by the varying relative speeds between rollers and strips.
In particular in the case of coated metal foils, the thickness of the coating varies as a result over the width of said metal foil.
Consequently, a hon (sic) homogeneous product and/or a product having defects in the coating, namely extraneous streaks or excessive thicknesses on edges, is obtained.
The document FR-A-1,365,153 (W. SCHMIDT) makes known a device for polishing or profiling edges of glass panels and mirrors. In this device, provision is made for the abrasive wheels, that is to say the polishing members, to be mounted on double oscillating arms. The abrasive wheels are brought into contact with the parts to be treated by a counterweight and/or a pressure spring.
This document, which relates to a totally different technical field from that with which the present invention is concerned, does not make it possible to solve the abovementioned disadvantages.
OBJECTS AIMED AT BY THE INVENTION
The present invention aims to overcome the various disadvantages mentioned above.
A specific object of the present invention consists in providing a device which permits continuous grinding of the edges of metal foils in strip form.
Another specific object of the present invention consists in providing a device of the type mentioned above which is stable as a function of the speed of movement of the metal foil strip.
CHARACTERISTIC ELEMENTS OF THE INVENTION
According to the present invention, the device of the type mentioned above comprises a stationary support mounted on a frame adjustable in height and a mobile support arranged so as to be able to slide on said stationary support in a direction essentially perpendicular to the direction of movement of the metal foil strip. The mobile support comprises an arm pivoting at its center on an essentially vertical axis and comprising at each of the two ends a guiding roller which bears on one and the same edge of a metal foil strip, a lower dressing roller and an upper dressing roller between which the metal foil strip is gripped and dressed with an adjustable pressure, an upstream tool holder which carries at least one cutting tool for dressing the sheared edge of the metal foil strip and a downstream tool holder which carries at least one tool for chamfering the upper and lower edges, the mobile support being brought into contact with the edge of the metal foil strip, via the guiding rollers, with an adjustable pressure which bears on the stationary support.
Tests have shown that the guiding of the tools on the edges with the aid of guiding rollers mounted on the two ends of an arm pivotable at its center is particularly advantageous and suitable for ensuring a permanent contact between the tools and the edges.
Advantageously, the pivotable arm is dimensioned such that the guiding rollers are located respectively upstream and downstream of the corresponding tool holders, so that one guiding roller bears on a rough edge and the other guiding rol
REFERENCES:
patent: 2062875 (1936-12-01), Gardner
patent: 2105736 (1938-01-01), Hudson
patent: 2120318 (1938-06-01), Wean
patent: 2214618 (1940-09-01), Kenyon et al.
patent: 2242815 (1941-05-01), Darner
patent: 2709874 (1955-06-01), Delafontaine
patent: 4265055 (1981-05-01), Cartwright et al.
Minne Claude
Pelerin Jacques
Pietteur Jacques
Sandretti Pino
Cockerill Sambre, Societe Anonyme
Rachuba M.
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