RU2218216C2 - Method for making belts - Google Patents

Abstract

FIELD: manufacture of belts with rolled edges. SUBSTANCE: method of making belts is realized due to using tension rollers with flanges providing counter-tension consisting 0.3 - 0.8 of yield limit of belt material. In order to provide edge rolling, rollers have grooved passes with outlet angle no more than 6 degrees. Invention provides elimination of edge curvature and enhanced stability of belt. EFFECT: enhanced quality of belts, enlarged assortment of made articles. 3 dwg, 2 ex

Description

 The invention relates to the metallurgical industry and can be used in the manufacture of tapes with machined edges.

 It is known that after longitudinal cutting of highly-sold ribbons on the edges there are burrs, a sharp edge, rib curvature (crescent) and grooves (warping - bending in the longitudinal direction).

 A known method of manufacturing tapes with machined edges (Production of flattened steel tape. / Vladimirov Yu.V., Nizhnik P.P., Purtov Yu.A., M .: Metallurgy, 1985, p. 121).

 This method has a significant drawback. When processing the edges of highly-mounted tapes, a gutter is created that reduces the accuracy of the tape size in width, and this method does not correct the crescent. The release in caliber is 9-12, with this release a gutter is formed on the tape, and the depth of the caliber is insufficient for processing wide tapes.

 In the invention, the listed disadvantages are eliminated by the following technology.

 The tape roll is installed on the unwinder, then it is passed through a three-roller anti-retraction station with flanges with a height equal to the thickness of the tape (in the case of higher flanges there are edge tears with a large rib curvature of the tape), passed through an edger stand with calibrated rolls (the depth of the caliber is not less than two tape thicknesses).

To pinch the tape in order to prevent its grooves, the gauges are cut with an outlet angle of not more than 6 ^o , then through the rolling stand of a quarto, three-roller tension station with flanges similar to those described above.

 To increase the effect of eliminating rib curvature and ensuring the stability of the tape in caliber when crimping the edges at three-roller tension tensioning stations, a counter-tension equal to 0.3-0.8 of the yield strength of the tape is set.

This method (figure 1) allows you to process tapes with a maximum thickness of 2.5 mm and a width of up to 50 mm with a ratio of width to thickness of up to 20 and with a yield strength of 400-2500 N / mm ² .

 Figure 1 shows a diagram of the manufacture of tape.

 1 - Uncoiler.

 2 - Anti-tension station.

 3 - Roller with flanges for correction of rib curvature.

 4 - Edger stands with chopped gauges.

 5 - Guide rollers.

 6 - Winder-unwinder.

 7 - Anti-tension station with rollers on which there are flanges for correcting rib curvature.

 8 - Crate the quarto.

 Examples of the manufacture of the tape according to this method.

Example 1
When processing strips of steel 70 with a yield strength of 600 N / mm ^2, dimensions 0.8-1.0 x 10.0-20 mm for side rings of tires with an initial rib curvature of 20 mm when using this method with an anti-tension of 0.60 t G 0, 2 and crimping in edgers of 0.5 mm, a tape was obtained with an accuracy in thickness and width of 0.015 mm and 0.08 mm, respectively, with a surface roughness according to GOST 2789 Ra = 0.32 μm without rib curvature and groove and a radius of rounding of the edge equal to the thickness of the tape .

The caliber on the edger rolls was cut into a depth of 2 and 5 mm and a width of 0.8-1.0 mm with an outlet angle of 6 ^o (figure 2).

Example 2
When processing a tape made of steel grade 65G with a size of 1.5x30 mm with a yield strength of 1700 N / mm ² and a rib curvature of 10 mm and an anti-tension of 0.8 G 0.2 and compression in edgers of 0.6 mm, a tape was obtained with an accuracy in thickness and width of 0.1 mm and 0.15 mm with a roughness according to GOST 2789 Ra = 0.16 μm without rib curvature and trough and a radius of rounding of the edge equal to 1/3 of the thickness of the tape.

The caliber on the edgers was cut into a depth of 6 mm and a width of 1.5 mm with an outlet angle of 5 ^o (figure 3) n

Claims (1)

A method of manufacturing tapes with minimal rib curvature and machined edges, including rolling with tension and processing the edges in the edger stand, characterized in that to eliminate rib curvature and ensure the stability of the tape when crimping the edges, an anti-tension is created equal to 0.3-0.8 from the limit the fluidity of the tape, with the help of tension roller stations equipped with flanges with a height equal to the thickness of the tape and the distances between the flanges equal to the width of the finished tape, and gauges of at least two depths are cut on the edger rolls x tape thickness and with an angle of release of not more than 6 °.

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