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Threaded hole welding and repairing process

A welding repair and threaded hole technology, applied in the field of welding repair technology, can solve the problems of difficult construction, affecting the processing and assembly of threaded holes, and lack of fusion, so as to improve the repair efficiency and quality, and reduce the welding height and welding volume.

Active Publication Date: 2017-12-22
中国船舶重工集团柴油机有限公司
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Problems solved by technology

CN 102817898 B discloses a threaded hole welding and repairing process. In this process, the threaded hole is expanded and then surfacing is filled. The surfacing welding of the whole threaded hole is filled with defects such as pores, slag inclusions and lack of fusion, which requires high skill of the welder and wastes a lot of time and welding consumables; If multiple threaded holes are repaired by overlay welding at the same time, the welding deformation will be relatively large, which will affect the subsequent threaded hole processing and assembly

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  • Threaded hole welding and repairing process

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Embodiment Construction

[0023] This embodiment takes 64-M80 115 / 150 threaded hole as an example for illustration. The diameter of the threaded hole is 80mm, the thread height is 115mm, and the depth of the threaded hole is 150mm. The specific implementation process is as follows, refer to figure 1 :

[0024] 1. Material preparation: prepare multiple round steel plates according to the height of the threaded holes. The first layer of round steel plates has a specification of ø78x30mm, the other round steel plates have a specification of ø65X10mm, and the quantity is 12 pieces.

[0025] 2. Reaming: Expand the diameter of the threaded hole to an inner hole with a diameter of 100mm and a depth of 120mm.

[0026] 3. Welding: Put the first layer of circular steel plate to the bottom of the threaded hole, and weld a circle around it. The welding method is metal arc welding, the welding wire type is ER70S-6, and the shielding gas is CO 2 , the welding current is 180A, the welding voltage is 21V, the welding...

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Abstract

The invention provides a threaded hole welding and repairing process. The threaded hole welding and repairing process comprises the following steps of material preparation, chambering, welding, surface treatment, drilling and tapping. According to the process, circular steel sheets are laid in an inner hole subjected to chambering to replace the bead welding quantity, bead welding in the small diameter of a thread is replaced with the circular sheets, the welding quality of the large diameter of the thread and the small diameter of the thread is guaranteed, and meanwhile it is guaranteed that the small diameter of the thread is filled with the circular steel sheets, so that positioning and construction are performed conveniently when redrilling is performed. By means of the process, the quality and efficiency of repair of a threaded hole can be improved, meanwhile welding deformation is lowered, and the threaded hole welding and repairing process is particularly suitable for welding and repairing of the deep threaded hole.

Description

technical field [0001] The invention relates to a repairing technology for threaded holes, in particular to a welding repairing process for deeper and larger threaded holes. Background technique [0002] During the production or use of the equipment, there will be thread damage or wrong thread pitch after the workpiece is manufactured, and production repair is required. The existing process plan is to fill up the wrong or damaged threaded holes and then re-drill them. tapping. CN 102817898 B discloses a threaded hole welding and repairing process. In this process, the threaded hole is expanded and then surfacing is filled. The surfacing welding of the whole threaded hole is filled with defects such as pores, slag inclusions and lack of fusion, which requires high skill of the welder and wastes a lot of time and welding consumables; If multiple threaded holes are repaired by overlay welding at the same time, the amount of welding deformation will be relatively large, which ...

Claims

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Application Information

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IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 陶哥宁李忠明李仁民张新强高兰云姜锡祥魏宁
Owner 中国船舶重工集团柴油机有限公司
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