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Welding repair method of iron casting

A technology of cast iron and welding repair, applied in welding medium, welding equipment, welding equipment, etc., can solve the problems of small fracture block area, inability to carry out welding repair, and thick workpiece thickness.

Inactive Publication Date: 2010-05-19
SHANGHAI SHIPYARD
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

However, effective welding repair cannot be carried out when there are many fractured blocks and irregular shapes, the area of ​​the fractured blocks is small, the thickness of the workpiece is thick, and the fractures need to bear longitudinal and transverse shear forces.

Method used

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  • Welding repair method of iron casting
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  • Welding repair method of iron casting

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Embodiment Construction

[0017] Attached below Figure 1-7 The preferred embodiments of the present invention are given to describe the technical solution of the present invention in detail.

[0018] The welding repair method for iron castings mainly includes two steps of processing fracture blocks and welding repair.

[0019] 1. Deal with the broken block of the cast iron base

[0020] (1) The fracture blocks 2 of the cast iron base 1 are grouped correspondingly.

[0021] (2) Perform groove grinding on the end faces 21 of the corresponding fracture blocks 2 to grind out a groove with an included angle of 60 degrees.

[0022] (3) Drill holes on the end faces of the corresponding fracture blocks 2 and thread them. According to the stress and size of the fracture blocks, install stainless steel bolts 3 ranging from φ6 to φ10mm on each fracture block, and then connect the two The block break blocks are inlaid together so that the stainless steel bolts 3 are arranged in a vertical and horizontal networ...

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Abstract

The invention relates to a repair-welding method of an iron casting. The section of the iron casting is grinded with a groove; the pre-welded part of the iron casting is preheated and then welded withwelding rods; after welding, the heat of the welded part is preserved; before the pre-welded part is preheated, the section of the iron casting is drilled with a hole and cut with a screw thread; then a bolt is installed in the hole and is fixed by welding. The adoption of the novel welding method can solve the problems that can not be solved by an ordinary welding method: 1. a plurality of fractured blocks with irregular shapes; 2. relatively small areas of the fractured blocks; 3. relatively thick workpieces; 4. the fractured places need to bear longitudinal and horizontal shearing forces.In addition, the method also has strong actual operability, low work cost, high production efficiency and the strength and the anti-shearing of the repair-welded load-bearing iron casting base is equivalent to the performance of the original iron casting base.

Description

technical field [0001] The invention relates to a welding repair method for iron castings, in particular to a welding repair method for a load-bearing cast iron base. Background technique [0002] When the existing load-bearing cast iron base is broken, the section of the broken cast iron base is often polished to a groove, the pre-welded part is preheated, and then welded with a pig iron electrode. After welding, the welded part is kept warm. method. This method is more suitable for cast iron bases with few broken pieces, thin workpieces and general fastness requirements. However, effective welding repair cannot be carried out when there are many fracture blocks and irregular shapes, the area of ​​the fracture blocks is small, the thickness of the workpiece is thick, and the fractures need to bear longitudinal and transverse shear forces. Contents of the invention [0003] The purpose of the present invention is to provide a welding repair method for iron castings, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P6/00B23K31/02B23K35/30
Inventor 朱自新
Owner SHANGHAI SHIPYARD
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