High-precision grizzly screen manufacturing technology and special-purpose welding press

Abstract

The invention relates to a grizzly manufacturing method and a device, which is a manufacturing technique of a high-precision grizzly and a special press welder. The method is that a grizzly bar 11 is first wound on a shaft-like electrode, a trim strip is arranged at the upper surface, and the other electrode presses the trim strip 13 for welding. The device is provided with a machine frame 1 to support two electrodes, one is the long shaft-like shaft electrode 6, the other is the wheel-shaped wheel electrode 7, the axes of the shaft electrode 6 and the wheel shaft 7 are vertical, and the two electrodes relatively move along the axis direction of the shaft electrode 6 for completing the welding. The high-precision grizzly press welder uses the long shaft-like electrode to replace the original long cage-like electrode; as the shaft surface is smooth and trim, the winding is accurate and correct, when in welding, the voltage between the two electrodes is stable, the welding quality is good, the smoothness and various indicators of the prepared grizzly surface are significantly improved. The welding strokes of the two electrodes are significantly shortened, the loss of the electrodes, the power consumption and the operation cost are greatly reduced, thus creating the conditions for the improvement of the production level of the grizzly.

Description

Technical field [0001] The invention relates to a grid screen manufacturing method and equipment, that is, a high-precision grid screen manufacturing process and a special pressure welding machine. Background technique [0002] The grid screen is a screening device, which is composed of dense longitudinal grid bars connected with multiple horizontal layers on the back. The grid screen has the advantages of simple structure, uniform gap, and sharp grid edges. Compared with the perforated or woven screen surface, it has the advantages of high strength, good cutting performance, and strong passability. Therefore, it is widely used in starch screening, pulp screening, etc. White liquor treatment and many other fields. However, there are some drawbacks in the existing grid and screen manufacturing process and equipment, especially the relatively backward welding process of layering bars and grid bars, which leads to the fact that the working performance of grid and screen produc...

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that the support force received by the grid wire coiled outside the cage is uneven, the support force at the contact with the bead is very large, and the support force between the bead is very small, which causes the wheel electrode to repeatedly beat, Cause uneven screen surface

Especially for grid screens with triangular or trapezoidal cross-sections, since the sharp corners of the triangle or the short sides of the trapezoid are mostly welded to the bead, it is very unstable and easy to skew, and the grid is prone to appear under the condition of uneven pressure. The phenomenon of uneven distortion will reduce the flatness and working performance of the working surface of the product

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