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Welding method of carbon steel thin-plate box

A welding method and thin plate technology, applied in welding equipment, arc welding equipment, workpiece edge parts, etc., can solve the problems of large manual operation error, prolonged working hours, scrap, etc., and achieve convenient production, good process stability, and reasonable selection. Effect

Active Publication Date: 2012-06-20
TANGSHAN CAOFEIDIAN DISTRICT SHOUYAN MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If these welds are welded manually, it will not only prolong the working hours, but also cause unnecessary repairs or even scrapping due to large manual operation errors.

Method used

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  • Welding method of carbon steel thin-plate box
  • Welding method of carbon steel thin-plate box
  • Welding method of carbon steel thin-plate box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The sheet material is Q235A, the thickness is 6mm, and the welding length is 6m.

[0032] The following steps and process parameters are used to make:

[0033] 1) Process a bevel on a thin plate to be welded, the groove cut angle α is 15°, the uncut thickness d is 1 / 3t, and the gap h between the other thin plate to be welded is 1 / 3t, where t is the thickness of the welded sheet;

[0034] 2) Wipe the processed surface of the thin plate to be welded with welding ketone to remove the oil stain on the surface;

[0035] 3) After splicing the two welded sheets, perform spot welding at intervals of 100 mm, keep the positions of the two welded sheets fixed, and keep the gap between them even;

[0036] 4) Submerged arc automatic welding is used for welding, and the welding parameters are selected as follows: welding current I: 38A, welding speed v: 80mm.min -1 , CO 2 Gas flow Q: 13L.min -1 ;

[0037] 5) After welding one side, turn it over to grind and clean the welding sl...

Embodiment 2

[0047] The sheet material is Q235A, the thickness is 6mm, and the welding length is 8m.

[0048] The following steps and process parameters are used to make:

[0049] 1) Process a bevel on a thin plate to be welded, the groove cut angle α is 30°, the uncut thickness d is 1 / 2t, and the gap h between the other thin plate to be welded is 1 / 2t, where t is the thickness of the welded sheet;

[0050] 2) Wipe the processed surface of the thin plate to be welded with welding ketone to remove the oil stain on the surface;

[0051] 3) After splicing the two welded sheets, perform spot welding at intervals of 100 mm, keep the positions of the two welded sheets fixed, and keep the gap between them even;

[0052] 4) Submerged arc automatic welding is used for welding, and the welding parameters are selected as follows: welding current I: 48A, welding speed v: 100mm.min -1 , CO 2 Gas flow Q: 13L.min -1 ;

[0053]5) After welding one side, turn it over to grind and clean the welding sl...

Embodiment 3

[0063] The sheet material is Q235A, the thickness is 6mm, and the welding length is 6m.

[0064] The following steps and process parameters are used to make:

[0065] 1) Process a bevel on a thin plate to be welded, the groove cut angle α is 25°, the uncut thickness d is 1 / 3t, and the gap h between the other thin plate to be welded is 1 / 3t, where t is the thickness of the welded sheet;

[0066] 2) Wipe the processed surface of the thin plate to be welded with welding ketone to remove the oil stain on the surface;

[0067] 3) After splicing the two welded sheets, perform spot welding at intervals of 100 mm, keep the positions of the two welded sheets fixed, and keep the gap between them even;

[0068] 4) Submerged arc automatic welding is used for welding, and the welding parameters are selected as follows: welding current I: 43A, welding speed v: 90mm.min -1 , CO 2 Gas flow Q: 13L.min -1 ;

[0069] 5) After welding one side, turn it over to grind and clean the welding sl...

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Abstract

The invention provides a welding method of a carbon steel thin-plate box, comprising the following steps of: firstly, machining a reasonable bevel structure on a thin plate to be welded and welding by utilizing a submerged arc automatic welding way, wherein welding parameters are as follows: a welding current I is 38-48 A, a welding speed v is 80-100 mm / min<-1>, the flow Q of CO2 gas is 13 L.min<-1>; combining and welding all panels of the box and splicing the four sides and the bottom surface of the box; carrying out discontinuous spot welding before welding, wherein the gap between spaced points is 100 mm; and then additionally arranging an X-shaped supporting rod in the box to keep the rigidity of the welding process. The welding method provided by the invention is applicable to machining the carbon steel thin-plate box; and the welding process has the advantages of utilization of the automatic welding way, convenience for manufacturing the bevel, reasonable technological parameters and good process stability, and the welding quality can meet the requirements of batch production, thereby realizing technical indexes of the product design.

Description

Technical field: [0001] The invention relates to an automatic welding method for a large carbon steel sheet box. Background technique: [0002] The furnace throat and furnace shell of the large steel structure in the metallurgical field belongs to the large welded steel structure of the closed box. These large structural parts are large steel structural parts welded from thin steel plates. The thickness of the steel plate is generally 6mm, the maximum length can reach 9128mm, the maximum width is 2928mm, and the material is Q235A. The side plate, top plate and bottom plate of the box body and the whole shell are made by combined welding and assembly. [0003] Q235A is the most commonly used carbon structural steel. It is very difficult to meet the requirements of geometric dimensions and shape and position tolerances when welding the above-mentioned super-large boxes. Due to the insufficient width of the plates, it is necessary to butt the plates, and the weld seam can be...

Claims

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Application Information

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IPC IPC(8): B23K9/18B23K33/00B23K9/235
Inventor 赵丽琴蒲存虎连广东张建明
Owner TANGSHAN CAOFEIDIAN DISTRICT SHOUYAN MACHINERY CO LTD
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