General welding clamp for Francis runner

Abstract

The invention discloses a general welding clamp used for a Francis runner, belonging to the field of hydraulic machinery technology. The welding clamp is provided with a chassis, three brackets on the chassis and a movable part center positioning device; the bracket is provided with an upper coronal adjusting block and a lower ring adjusting block; the welding clamp is characterized in that the brackets are fixedly arranged on a sliding block which is clamped on the chassis by a bond; an upper coronal adjusting screw is connected with the sliding block; the upper coronal adjusting block is arranged on the sliding block; the bracket is provided with a lower ring adjusting screw rod which is connected and matched with the lower ring adjusting block; the movable part center positioning device is provided with a positioning sleeve which is clamped at the central hole of the runner; a positioning core shaft is sheathed in the positioning sleeve; and a swing plate is sheathed on the positioning core shaft. Compared with the prior art, the welding clamp has compact structure and convenient operation, is suitable for butt-welding of the Francis runner of different types and specifications, can effectively ensure the welding quality and reduce the swing-welding cost and manufacture difficulty.

Description

technical field [0001] The invention belongs to the technical field of hydraulic machinery, and in particular relates to a universal welding fixture for a mixed-flow runner. Background technique [0002] The runner is the heart of hydraulic machinery. The production cost of the runner accounts for about 1 / 3 of the complete set of hydraulic machinery. The technical content is very high, and the runner is the most difficult part to process, so its gold content is also very high. Among them, the production performance of the runner is often used to define the manufacturing capacity and technical level of a company, but the flow channel shapes of the upper crown, lower ring and blade of the existing mixed-flow runner are different, and the weaving welding of the runner must be based on special The flow channel is used to design special tooling and formulate special test welding processes. Usually, different models and specifications of mixed flow runners must manufacture a diffe...

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