Method for Expanding the Cylinder Wall of Transformer Inclined Raising Seat

Abstract

The invention relates to a method for unfolding a cylinder wall of an inclined opening ascending seat of a transformer and belongs to the technical field of transformer panel beating. The technical scheme is as follows: the axial length of any unfolding position of the cylinder wall is equal to that of a shorter edge in the inner side edge of the cylinder wall and the outer side edge of the cylinder wall in the unfolding position; when the length of the inner side edge of the cylinder wall is equal to that of the outer side edge of the cylinder wall, the axial length of the unfolding position of the cylinder wall is equal to that of any side edge. The actual shape of the section of the cylinder wall is the MQPF rectangle (seen in the specification), and a delta H error in the axial direction occurs, so that the axial length of the MQPF rectangle can be obtained by subtracting the delta H only. The method has the following benefits: the accurate unfolding of the cylinder wall of the inclined opening ascending seat is realized by blanking processing according to the actual cylinder wall; through application verification during operation, the problems that some parts are contacted while clearances exist in other parts when the inclined opening ends of the cylinder walls are in butt joint are solved, so that the welding operation is facilitated, the welding quality is improved, and the actual height of the cylinder wall of the ascending seat is ensured.

Description

technical field [0001] The invention relates to a method for unfolding the cylinder wall of a transformer bevel raised seat, which belongs to the technical field of transformer sheet metal processing. Background technique [0002] The riser seat is an important part of the transformer oil tank, and the shape of the cylinder wall of the beveled riser seat (hereinafter referred to as the cylinder wall) is shown in figure 1 , figure 2 , one end has a bevel and is flat, and the inclination angle of the bevel end is α. It is rolled according to the expansion diagram of the cylinder wall after blanking the plate. Usually, the design expansion diagram is the expansion diagram of the neutral layer of the cylinder wall, and is drawn in the XOY plane. The expansion curve is the expansion shape of the intersecting line between the neutral layer of the cylinder wall and the plane of the bevel end. The X-axis coordinates of any point on the curve are from The arc length of the neutral...

AI Technical Summary

Problems solved by technology

Due to the blanking process of the plate, there is an axial error in the position of the bevel end of the cylinder wall processed according to the expansion diagram of the neutral layer, and the axial error is different at different expansion positions, and the axial error will cause the bevel end of the cylinder wall to be different from the Partial contact occurs on the mating surface, and gaps appear in other parts, making welding difficult and prone to welding quality problems

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