Welding structure of metal defect digging-patching welding groove of steel casting and reinforcing method of welding structure

A technology for metal defects and welding structures, which is applied in welding equipment, metal processing equipment, and edge parts of workpieces. problems, to achieve the effect of inhibiting harmful effects and improving thermal field distribution

Active Publication Date: 2018-12-18
哈尔滨中正焊接技术开发有限公司 +6
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention solves the problem of excessive welding volume in the repair welding area, difficulty in controlling welding deformation, poor overall crack resistance, poor welding structure stability and fatigue resistance in existing large-scale cast steel component fatigue defects. To solve the relevant technical problems of guarantee, a welding structure and its reinforcement method for digging and repairing welding grooves of metal defects in steel castings are provided

Method used

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  • Welding structure of metal defect digging-patching welding groove of steel casting and reinforcing method of welding structure
  • Welding structure of metal defect digging-patching welding groove of steel casting and reinforcing method of welding structure
  • Welding structure of metal defect digging-patching welding groove of steel casting and reinforcing method of welding structure

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specific Embodiment approach 1

[0027] Specific Embodiment 1: The welding structure of the metal defect digging and repairing welding groove of the steel casting in this embodiment is to use welding deposited metal welding to form a layer of shell 1 on the welding groove wall and welding groove bottom of the digging and repairing welding. The inner wall of the body 1 is provided with a plurality of built-in steel webs 2 at intervals along the longitudinal and transverse directions of the weld, and the interior of the welding groove with a shell structure is separated into a plurality of partition spaces by the built-in steel webs 2 .

[0028] The specific plane geometric shape and contour size of each built-in steel web in this embodiment should be determined according to the geometric factors of the actual digging and repairing welding groove on site The hierarchical area inside the mouth and the groove cross-section where it is located are set identically to achieve gapless mosaic.

specific Embodiment approach 2

[0029] Specific implementation mode two: the reinforcement method of the welding structure of the metal defect digging and repairing welding groove of the steel casting in this embodiment is implemented according to the following steps:

[0030] Step 1. Welded shell structure: along the welded groove wall and the welded groove bottom, a shell 1 that is completely fused with the welded groove wall and the groove bottom is welded in advance with the deposited metal, and a shell with a shell is obtained. The welding groove of the body;

[0031] Step 2. Spatial arrangement of built-in steel webs: in the internal space enclosed by the shell structure in the welding groove, several rows and columns of built-in steel webs 2 are arranged at intervals along the longitudinal and transverse directions of the welds. , between the inner side of the shell 1 and the contact surfaces of the built-in steel webs 2 arranged vertically and horizontally, and between the built-in steel webs 2, so a...

specific Embodiment approach 3

[0034] Specific embodiment 3: The difference between this embodiment and specific embodiment 2 is that in step 1, the metal defects inside the welding groove of the digging and repair welding are cleaned up in advance, and the welding groove wall and the welding groove bottom are inspected by coloring, and then polished Solder interface.

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Abstract

The invention relates to a welding structure of a metal defect digging-patching welding groove of a steel casting and a reinforcing method of the welding structure. By adoption of the welding structure of the metal defect digging-patching welding groove of the steel casting and the reinforcing method of the welding structure, the technical problems that during digging-patching welding of an existing large cast steel component, deformation of a welding structure is difficult to control, a repair welding area is likely to crack, and the structural stability and fatigue resistance of the weldingstructure cannot be guaranteed easily can be solved. The reinforcing method comprises the steps of first, welding a shell structure; second, arranging a plurality of rows and columns of multi-stage internal steel webs at intervals in the longitudinal and horizontal directions of a weld joint and the depth direction of the groove; third, filling welding deposited metal in a separated space of the welding groove; and fourth, conducting facing welding on the surface of the welding groove. According to the reinforcing method, a shell and rigid framework three-dimensional welding structural systemconstructed through welding can resist and disperse the shrinkage stress of weld joint metal, the welding deformation is effectively controlled, the stability of the welding structure is improved, propagation of fatigue cracks is changed, and accordingly, the propagation rate of the cracks is decreased.

Description

technical field [0001] The invention relates to a welding structure for digging and repairing welding grooves of metal defects in steel castings and a reinforcing method thereof, belonging to the technical field of welding structures. Background technique [0002] In medium carbon cast steel components such as tires and supporting wheels of cement rotary kilns in large-scale production equipment in the building materials industry or hollow shafts of cement mills, it is inevitable that some original pores, inclusions or loose structures generated during the casting process of the components remain. Casting defects. Therefore, in the long-term service process, the original casting defects are more likely to produce stress concentration (sharp angle effect) and local fatigue damage, which becomes the source of cracks. Under the continuous action of dynamic load and its alternating stress, the casting structure will further aggravate the fatigue damage of the metal, and its cra...

Claims

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Application Information

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IPC IPC(8): B23K33/00B23K31/02
CPCB23K31/02B23K33/00
Inventor 钟彬方洪渊陈波鲍爱莲查晓雄刘铁军赵云峰王玉银邓宏卫杜淼才维忠刘万辉赵春驰李洪斌史庆国林琳马千里钟雪霏周琦张海峰王晓楠黄垒
Owner 哈尔滨中正焊接技术开发有限公司
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