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A cylindrical full penetration submerged arc automatic welding method without root cleaning

A submerged arc automatic welding and automatic welding technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as low welding efficiency, achieve stable welding quality, solve the effect of large welding material consumption and simple process

Active Publication Date: 2018-03-13
SINOHYDRO ENG BUREAU 4 XIANGYUN MACHINERY ENERGY EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The automatic submerged arc welding without root cleaning in the prior art is limited to steel structures with special structures and uses such as H-shaped steel. For the widely used cylindrical welded structural parts, the traditional root submerged arc welding process can only be used. Not only the welding efficiency is low, but also there are various disadvantages of root cleaning

Method used

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  • A cylindrical full penetration submerged arc automatic welding method without root cleaning
  • A cylindrical full penetration submerged arc automatic welding method without root cleaning
  • A cylindrical full penetration submerged arc automatic welding method without root cleaning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] like figure 1 , 2 As shown in and 6, the welding process parameters and steps are as follows:

[0047] S100: Cut the material according to the requirements, and then make a one-way groove with an angle of 45±2° and a depth of 4mm on the long side of the steel plate against the outside of the cylinder (that is, the thickness of the blunt side is 10mm);

[0048] S200: Roll the above-mentioned beveled steel plate according to the requirements of φ4300 and the misalignment amount is not greater than 1mm and the weld gap is not greater than 0.5mm to form a cylinder and form a V-shaped weld on the outer side;

[0049] S250: Position the gaps on the outer side of the forming cylinder for manual arc spot welding at intervals of 500mm, and then clean up the height of the welding points to be lower than the height of the submerged arc welding wire, as well as weld corrosion, scale, and sundries.

[0050] S300: For the outer groove of the longitudinal gap of the formed cylinder,...

Embodiment 2

[0055] like figure 1 , 2 As shown in and 6, the welding process parameters and steps are as follows:

[0056]

[0057] S100: Cut the material according to the requirements, and then make a one-way groove with an angle of 45±2° and a depth of 6mm on the long side of the steel plate against the outside of the cylinder (that is, the thickness of the blunt side is 14mm);

[0058] S200: Roll the above-mentioned beveled steel plate according to the requirements of φ4300 and the misalignment amount is not greater than 1mm and the weld gap is not greater than 0.5mm to form a cylinder and form a V-shaped weld on the outer side;

[0059] S250: Position the gaps on the outer side of the forming cylinder for manual arc spot welding at intervals of 500mm, and then clean up the height of the welding points to be lower than the height of the submerged arc welding wire, as well as weld corrosion, scale, and sundries.

[0060] S300: For the outer groove of the longitudinal gap of the form...

Embodiment 3

[0065] like figure 1 , 3 As shown in and 7, the welding process parameters and steps are as follows:

[0066] S100: Cut the material according to the requirements, and then open the short side of the steel plate against the outside of the cylinder to an angle of 45±2° and depth

[0067]

[0068] A one-way bevel of 6mm, and a one-way bevel with an angle of 35±2° and a depth of 12mm on the short side of the steel plate near the inner side of the cylinder (that is, leave the blunt edge 4mm);

[0069] S200: Roll the above-mentioned beveled steel plate according to the requirements of φ4300, misalignment not greater than 1mm and weld gap not greater than 1mm to form a cylinder and form double V-shaped welds;

[0070] S250: Position the gaps on the outer side of the forming cylinder for manual arc spot welding at intervals of 500mm, and then clean up the height of the welding points to be lower than the height of the submerged arc welding wire, as well as weld corrosion, scale,...

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Abstract

The invention discloses a cylindrical no-root full-penetration union melt welding method. The method comprises the following steps: a beveling step: one-way grooves of 45+-2 degrees with depths of 4-12 mm are formed in four edges, near the outer side of a cylinder, of a steel plate; a cylinder molding step: the steel plate is wound according to the diameter, the alignment tolerance and the welding line gap not more than 1 mm, or is in butt joint to form a cylinder in radial direction after winding, and a V-shaped welding line is formed on the outer side surface; an outer side groove bottoming step: the groove at the outer side of the longitudinal or annular gap of the cylinder is bottomed according to a filling thickness of 3-4 mm by manual arc welding or gas shielded welding; an inner side union melt welding step: the union melt welding is performed for the welding line at the inner side of the cylinder according to a welding layer filling thickness of 2-4 mm and cover surface weld reinforcement of not more than 2.5 mm; and an outer side union melt welding step: the union melt welding is performed for the welding line at the outer side of the cylinder according to the cover surface weld reinforcement of 1-3 mm. The method has the characteristics of smooth welding lines, high welding efficiency, stable quality and no open arc irritation and noise pollution.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing technology, and in particular relates to a cylindrical non-clearing full penetration submerged arc automatic welding method with smooth weld seam, high welding efficiency and stable quality, no bright arc stimulation and noise pollution. Background technique [0002] Submerged arc automatic welding is referred to as submerged arc welding for short. It is an arc welding method in which the arc is burned under the flux layer, and the arc is automatically ignited and controlled by machinery to automatically complete the feeding of the welding wire and the movement of the arc. Submerged arc automatic welding has the advantages of high productivity, high degree of mechanization, good and stable welding quality, in the fields of metal structures, bridges, pressure vessels, petrochemicals, nuclear containers, oil and gas pipelines, shipbuilding, etc. a wide range of applications. For fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/18B23K9/235
CPCB23K9/18B23K9/235
Inventor 陈文善梁金亮杨劲李贺威夏彦喆刘永江胡井林董芳芳
Owner SINOHYDRO ENG BUREAU 4 XIANGYUN MACHINERY ENERGY EQUIP CO LTD
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