On-line repairing method for fractured upper beam for hydraulic press casting and structure reinforcing device

Abstract

The invention relates to an on-line repairing method for a fractured upper beam for hydraulic press casting and a structure reinforcing device. The on-line repairing method is characterized in that the fractured upper beam is reset, a pressure stress weld joint is formed at the position of a crack, a box-shaped structure reinforcing device is arranged in a force-loaded area of the upper beam, the structural strength of the upper beam is promoted and the on-line repairing is realized. The on-line repairing method comprises the following steps: 1) resetting; 2) processing a groove; 3) preheating and welding in sections; 4) performing heat treatment; 5) welding cracks on an outer wall; and 6) arranging the box-shaped structure reinforcing device. The structure reinforcing device is characterized in that two vertical tendons are arranged on the two sides of the crack; 3-4 transverse bars are arranged on the vertical tendons; cover plates are arranged between the transverse bars, thereby forming a box-shaped structure; and an upper lacing bar is arranged on the upper beam. The on-line repairing method has the advantages that the fractured crack is welded and the box-shaped structure reinforcing device is arranged in the force-loaded area of the upper beam, thereby realizing the on-line repairing of the fractured upper beam for a hydraulic press and promoting the structural strength of the upper beam.

Description

technical field [0001] The invention relates to an online repair method and a structural reinforcing device for the fracture of an upper beam of a hydraulic press casting. Background technique [0002] The hydraulic press is a kind of forging equipment with a beam-column structure. The upper beam is an important part of the hydraulic press. It is equipped with a main working cylinder and a lifting cylinder. It mainly bears the reaction force of the entire tonnage pressure of the forging. The generated moment or lateral thrust, that is, the effect of alternating bending moment, is most likely to be damaged during work, resulting in a production stoppage accident. [0003] For example, if a new casting beam is made, it will take at least 4 to 5 months from blank to finishing. In order not to affect the production progress, the method of welding and repairing the fractured part is adopted. The main problem is that the upper beam is a casting product. In addition, irregular cra...

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Problems solved by technology

[0002] The hydraulic press is a kind of forging equipment with a beam-column structure. The upper beam is an important part of the hydraulic press. It is equipped with a main working cylinder and a lifting cylinder. It mainly bears the reaction force of the entire tonnage pressure of the forging. The generated moment or lateral thrust, that is, the effect of alternating bending moment, is most likely to be damaged during work, causing production stoppage accidents

[0003] For example, if a new casting beam is made, it will take at least 4 to 5 months from blank to finishing. In order not to affect the production progress, the method of welding and repairing the fractured part is adopted. The main problem is that the upper beam is a casting product. And the fractured part shows irregular cracks, and the biggest problem is to formulate a perfect welding process to ensure the strength of the upper beam after repair

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