Elbow pipe integral forming production process and production device thereof

Abstract

The invention discloses an elbow pipe integral forming production process and a production device thereof, the production process comprises the following steps of pipe blank preparation, pipe blank fixing, centering sealing, low-pressure water replenishing, pressurization water expansion, pressure relief pipe taking and elbow segmentation, and the production device comprises an elbow pipe water expansion forming mechanism; a water expansion mold in the elbow water expansion forming mechanism comprises an upper mold and a lower mold, the upper mold is provided with an upper half forming cavity, the lower mold is provided with a lower half forming cavity, and the lower half forming cavity and the upper half forming cavity are matched to form an elbow forming cavity. Side pressure cylinders are arranged at the two ends of the water expansion mold respectively, an expansion punch communicated with the water pressure injection cylinder is arranged at the telescopic end of the side pressure cylinder on one side, and a sealing plug assembly is arranged at the telescopic end of the side pressure cylinder on the other side. A large number of elbows can be manufactured through one-time water expansion, energy waste is reduced, and production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of processing metal pipe fittings, in particular to a production process for integrally forming an elbow pipe and a production device thereof. Background technique [0002] In the pipeline system, the elbow is mostly installed at the corner of the pipeline and connected with the pipe to form a pipeline to change the direction of the pipeline. The existing elbows with complex shapes are made by stamping the upper and lower parts of the iron sheet, and then the two independent iron sheets are welded, leaving welding lines and processes on the surface of the elbow that affect the appearance. The surface of the welded elbow is uneven, and there will be solder joints produced during welding on the surface. It is necessary to increase the subsequent grinding and polishing process. The dust generated by grinding and polishing will also have a certain impact on the factory environment. The manpower consumption is la...

AI Technical Summary

Problems solved by technology

The existing elbows with complex shapes are made by stamping the upper and lower parts of the iron sheet, and then the two independent iron sheets are welded, leaving welding lines and processes on the surface of the elbow that affect the appearance. The surface of the welded elbow is uneven, and there will be solder joints produced during welding on the surface. It is necessary to increase the subsequent grinding and polishing process. The dust generated by grinding and polishing will also have a certain impact on the factory environment. The manpower consumption is large and the process is relatively cumbersome.

In order to make the finished elbow more plump and smooth, and reduce the subsequent grinding process, some manufacturers use the water expansion method to process the elbow, but the production process can only process one elbow at a time, and the pressure cylinder needs to be raised repeatedly during production. Putting in the next curved pipe to be processed has low efficiency, and the energy consumption required for frequent pressurization and water expansion is too large, resulting in energy waste and high production costs, which cannot meet the needs of mass production

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