CN101357429B - Welding repair method of iron casting - Google Patents
Welding repair method of iron casting Download PDFInfo
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- CN101357429B CN101357429B CN200710044529A CN200710044529A CN101357429B CN 101357429 B CN101357429 B CN 101357429B CN 200710044529 A CN200710044529 A CN 200710044529A CN 200710044529 A CN200710044529 A CN 200710044529A CN 101357429 B CN101357429 B CN 101357429B
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- iron casting
- ironcasting
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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
The present invention relates to a kind of repair method of ironcasting, particularly relate to a kind of repair method of load-bearing cast iron base.
Background technology
During the fracture of existing load-bearing cast iron base, the sections of cast iron base that will fracture that adopt polish groove more, and preheating is carried out at the position of pre-welding, then with the pig iron electrode welding, and after welding finishes, the method that welding portion is incubated.This method is few for the fracture piece, thickness of workpiece is thin and fastness requires general cast iron base more suitable.But at the fracture piece many and occur irregular, fracture piece area is less, thickness of workpiece is thicker and fracture place need be born in length and breadth to the situation of shearing force, then can't carry out effective soldering.
Summary of the invention
The repair method that the purpose of this invention is to provide a kind of ironcasting has overcome conventional method and only has been applicable to that the fracture piece is few, thickness of workpiece is thin and the limitation of the ironcasting that the fastness requirement is general.
The objective of the invention is to be achieved through the following technical solutions:
Section with this ironcasting polish groove earlier, preheating is carried out at position to pre-welding, weld with welding rod then, after welding finishes, this welding portion is incubated, its characteristics are, before to this pre-welding position preheating, on the section of this ironcasting, change the hole and strand is made screw thread, construction bolt in this hole then, and this bolt welding is fixing.
Wherein, this bolt can be made with stainless steel, and diameter is φ 6-φ 10mm.And when this bolt is installed, be netted staggered installation, can bear shearing force and extruding force in length and breadth to guarantee soldering place.
As these further improvements in methods, when welding bolt fixedly, used type of electrode is selected 316L stainless steel pure nickel electrode for use.
Positive progressive effect of the present invention is:
Adopt this novel welding method can solve with the insurmountable situation of general welding method: the piece that 1, ruptures is many and occur irregular; 2, fracture piece area is less; 3, thickness of workpiece is thicker; 4, fracture place need be born in length and breadth to shearing force.
This method also has very strong actual operation, and job costs are low, the production efficiency height, and also the performance of the intensity of the load-bearing cast iron base after the soldering and shear resistant and former cast iron base is suitable.
Description of drawings
Fig. 1 is the front view of load-bearing cast iron base.
Fig. 2 is the generalized section of load-bearing cast iron base fracture.
The structural representation that Fig. 3 and Fig. 4 install for stainless steel bolt in the preferred embodiment of the present invention.
The schematic diagram of Fig. 5 for the plane of disruption is polished.
Fig. 6 is for boring hank knotting on the plane of disruption and the schematic diagram of stainless steel bolt is installed.
Fig. 7 is the schematic diagram after two fracture piece edges are pieced together.
The specific embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing 1-7, to describe technical scheme of the present invention in detail.
Described ironcasting repair method, it mainly comprises handles fracture piece and soldering two big steps.
1, handles the fracture piece of cast iron base
(1) the fracture piece 2 with cast iron base 1 carries out the correspondence marshalling.
(2) end face 21 in correspondence with each other fracture piece 2 carries out the groove grinding process, and polishing angle is the grooves of 60 degree.
(3) boring and strand are made screw thread on the end face of in correspondence with each other fracture piece 2, according to fault block stressing conditions and size, the stainless steel bolt 3 that φ 6-φ 10mm does not wait is installed on each fracture piece respectively, two fracture piece edges is pieced together making 3 one-tenth netted in length and breadth arrangements of stainless steel bolt then.Because the section at fracture piece 2 has the bolt 3 of netted arrangement in length and breadth, thereby has guaranteed that soldering place can bear shearing force and extruding force in length and breadth.
2, soldering
(1) stainless steel bolt 3 welding that will rupture earlier on piece 2 end faces are appropriate, and the type of electrode that uses is 316L stainless steel pure nickel electrode, and this operation is strengthened resolving between the cleavage block fixing on the both direction in length and breadth.
(2) the welding scope is carried out preheating, preheat temperature is controlled at about 200-250 degree centigrade; Use casting 408 ferronickel welding rods to carry out the built-up welding of multilayer multiple tracks in the mode of little electric current, knock-off welded coating and cleans welding bead after welding finished, and evenly rapped welding bead with hand hammer simultaneously, to eliminate welding stress; In this step, workpiece temperature will remain on about 200250 degrees centigrade.Wherein, the insulation of the cleaning of welding bead, the elimination of welding stress and workpiece is crucial operation, and these operations are finished the height of quality, directly has influence on every performance indications of the base after the soldering.
(3) continue to use casting 408 ferronickel welding rods to carry out built-up welding, surpass fracture plane 1.0-1.5 millimeter until built-up welding in the mode of little electric current.
Take the soldering order alternately of being separated by when (4) welding, can prevent the local deformation that base is unilateral like this.
(5) be incubated and gently hammered into shape the welding scope after the welding with hand hammer, thus the elimination welding stress.
(6) make the framework suitable mutually with the AH plate, use the welding of SH422 welding rod, it is coated on the cast iron base 1 with cast iron base 1.In this way, can eliminate the issuable fracture of soldering place fully.
The present invention is different from one of major measure of traditional ironcasting repair method and is: the processing stage of the fracture piece, commentaries on classics hole and strand are made screw thread on the section of fracture piece, are the stainless steel bolt that netted staggered installation φ 6-φ 10mm does not wait then in this screwed hole.So both prevented the diffusion of crackle, guaranteed again that soldering place can bear shearing force and extruding force in length and breadth.
The present invention is different from one of major measure of traditional ironcasting repair method and also is: in the soldering stage, the stainless steel bolt welding of using 316L stainless steel pure nickel electrode will rupture earlier on the piece end face is appropriate, and this operation is strengthened resolving between the cleavage block fixing on the both direction in length and breadth.
Claims (4)
1. the repair method of the ironcasting of a fracture, section with this ironcasting polish groove earlier, the welding position is carried out preheating, weld with welding rod then, after welding finishes, this welding position is incubated, it is characterized in that, before to this welding position preheating, on fracture piece in correspondence with each other boring and the strand make screw thread, according to fault block situation and size, respectively the fracture piece on construction bolt, then two fracture piece edges are pieced together making described bolt become netted in length and breadth arrangement, at last that described bolt welding is fixing.
2. the repair method of the ironcasting of fracture according to claim 1 is characterized in that described bolt is that stainless steel is made.
3. the repair method of the ironcasting of fracture according to claim 1 and 2 is characterized in that the described diameter of bolt is φ 6-φ 10mm.
4. the repair method of the ironcasting of fracture according to claim 1 and 2 is characterized in that the fixing employed type of electrode of described bolt of welding is a 316L stainless steel pure nickel electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710044529A CN101357429B (en) | 2007-08-03 | 2007-08-03 | Welding repair method of iron casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710044529A CN101357429B (en) | 2007-08-03 | 2007-08-03 | Welding repair method of iron casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101357429A CN101357429A (en) | 2009-02-04 |
| CN101357429B true CN101357429B (en) | 2010-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710044529A Expired - Fee Related CN101357429B (en) | 2007-08-03 | 2007-08-03 | Welding repair method of iron casting |
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| Country | Link |
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| CN (1) | CN101357429B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101220A (en) * | 2011-03-30 | 2011-06-22 | 储勤旺 | Method for welding rupture of large casting equipment |
| CN104162761B (en) * | 2014-08-18 | 2016-08-24 | 青岛海之冠汽车配件制造有限公司 | flywheel crack repairing method |
| CN104526254A (en) * | 2015-01-09 | 2015-04-22 | 江苏龙胜机床制造有限公司 | Four-roll plate bending machine rack fracture welding and repairing method |
| CN104526253A (en) * | 2015-01-09 | 2015-04-22 | 江苏龙胜机床制造有限公司 | Four-roll plate bending machine rack crack welding and repairing method |
| CN110125608A (en) * | 2019-05-20 | 2019-08-16 | 马斯特模具（昆山）有限公司 | A kind of method for repairing and mending that interior heating flow distribution plate heater strip is exposed |
| CN114559208A (en) * | 2022-03-15 | 2022-05-31 | 湖南高创新能源智慧运维有限公司 | Method and structure for repairing fan brake disc in cabin |
| CN115401428A (en) * | 2022-10-13 | 2022-11-29 | 承驰传动科技(山东)有限公司 | Nodular cast iron traction motor welding process for rail transit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1149872A (en) * | 1966-09-21 | 1969-04-23 | Clugston Holdings Ltd | Method of repairing castings of haematite iron or other metal parts not readily weldable |
| CN1032305A (en) * | 1987-10-06 | 1989-04-12 | 乌拉尔基洛夫工业学院 | The restorative procedure on steelwork surface |
| CN1100642C (en) * | 1997-04-14 | 2003-02-05 | 通用电气公司 | Welf repair process and article repaired thereby |
| EP1541723A2 (en) * | 2003-11-21 | 2005-06-15 | Mitsubishi Heavy Industries, Ltd. | Welding method |
-
2007
- 2007-08-03 CN CN200710044529A patent/CN101357429B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1149872A (en) * | 1966-09-21 | 1969-04-23 | Clugston Holdings Ltd | Method of repairing castings of haematite iron or other metal parts not readily weldable |
| CN1032305A (en) * | 1987-10-06 | 1989-04-12 | 乌拉尔基洛夫工业学院 | The restorative procedure on steelwork surface |
| CN1100642C (en) * | 1997-04-14 | 2003-02-05 | 通用电气公司 | Welf repair process and article repaired thereby |
| EP1541723A2 (en) * | 2003-11-21 | 2005-06-15 | Mitsubishi Heavy Industries, Ltd. | Welding method |
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| CN101357429A (en) | 2009-02-04 |
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