A progressive flexible flanging device and process for a large-diameter thick-walled cylinder

Abstract

The invention discloses a large-caliber thick-wall cylinder gradual flexible flanging device and process. The device comprises an overall frame connected by a lower base, stand columns and an upper base; a large-caliber thick-wall cylinder is placed on a support concave mold mounted on the upper base; a movable working platform is mounted in the overall frame; the movable working platform comprises a Z-axle movable platform, a Y-axle movable platform connected to the Z-axle movable platform, and an X-axle movable platform connected with the Y-axle movable platform, and realizes movement in space; a forming cutter system is mounted on the X-axle movable platform, and comprises a forming tool head; and the forming tool head is connected with a driving mechanism through a shank. The process comprises the following steps: firstly, the large-caliber thick-wall cylinder is put on the support concave mold, and is opened to the lower side; then, the whole movable working platform is driven forpreforming through a bending deformation area of the forming tool head; and finally, the flanging formation is finished through a flanging forming area of the forming tool head. The device has the characteristics of good forming performances, high yield and the like.

Description

technical field [0001] The invention relates to the technical field of sheet metal forming, in particular to a progressive flexible flanging device and process for a large-diameter thick-walled cylinder. Background technique [0002] Gas-insulated metal-enclosed switchgear (GIS) plays an extremely important role in current domestic and foreign power systems. The GIS shell uses sulfur hexafluoride as the insulating and arc-extinguishing medium, and its high-voltage live parts are enclosed in a metal shell, and its side walls must have branch pipe flanges for the required pipeline connection. For the GIS shell, its tightness requirements are very high, and the welding seam should be avoided as much as possible in the process of manufacturing the shell. If a saddle-shaped opening is used for welding flanges, sharp corners and burrs on the weld seam will be formed, causing electric field Concentration, partial discharge occurs, which reduces the performance of the switch. [0...

AI Technical Summary

Problems solved by technology

However, there are still many problems in the progressive flanging process in the experiment, such as uneven edge of the branch pipe, deformation of the roundness of the branch part, bending or wrinkling in the transition area between the main pipe and the branch pipe, etc.

However, the above-mentioned progressive flanging process is not suitable for large-diameter thick-walled cylindrical parts. The structure of the tool head and the upward movement of the tool head mentioned in the article cannot meet the forming force and flanging of large-diameter thick-walled cylindrical parts. Require

At the same time, due to the influence of factors such as the size of large-diameter thick-walled cylindrical parts, supporting molds, fixtures, and operating space, the progressive flanging process of large-diameter thick-walled cylindrical parts cannot be completed on ordinary CNC machine tools

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