CN108673055B - Welding process - Google Patents
Welding process Download PDFInfo
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- CN108673055B CN108673055B CN201810824876.6A CN201810824876A CN108673055B CN 108673055 B CN108673055 B CN 108673055B CN 201810824876 A CN201810824876 A CN 201810824876A CN 108673055 B CN108673055 B CN 108673055B
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- 238000003466 welding Methods 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000003825 pressing Methods 0.000 claims abstract description 42
- 238000005498 polishing Methods 0.000 claims abstract description 15
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 230000007704 transition Effects 0.000 claims abstract description 6
- 210000001503 joint Anatomy 0.000 claims abstract description 5
- 239000003973 paint Substances 0.000 claims abstract description 5
- 239000003082 abrasive agent Substances 0.000 claims description 4
- 230000003749 cleanliness Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000007921 spray Substances 0.000 abstract 1
- 238000011179 visual inspection Methods 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
Abstract
The invention discloses a welding process, which comprises the following steps: the method comprises the following steps: cutting; beveling the butt joint of the connecting pipe, performing beveling cutting at different angles according to different pipe specifications, and performing grinding treatment on the cut part by adopting a grinding machine to enable the outer surface of the cut part to be in a smooth state; step two: pressing an angle; step three: welding; step four: polishing; step six: welding seam visual inspection is carried out to the welding body after the welding, carries out the epilogue that sprays paint of epilogue, and this application makes concatenation department smooth transition, does not have the closed angle structure to guarantee personnel's safety, make the appearance more pleasing to the eye, adopt two kinds of combination modes welding, make the welding fastness better, improve production efficiency, reduction in production cost has improved the mechanical strength of steel pipe welding seam department, reduces the epilogue processing work of polishing, improves the yields.
Description
Technical Field
The invention relates to the field of steel pipe welding, in particular to a welding process.
Background
At present, steel pipe preparation and welding are qualified one step of crucial for the product, according to the preparation standard, the welding quality requirement of this steel pipe is higher, and 45 degrees piece angles of pipe form sharp acute angle among the current steel pipe welding, easily cause the cut wound, endanger personal safety, the existence of this sharp angle can not accord with the international or national standard of relevant sport equipment, in addition, current welding adopts the full spot welding mode, its welding time is long, it is big to lodge the department heat, easily cause the breakdown during spot welding, the yields is low, this steel pipe welding seam department welding machine mechanical properties's intensity is less than, make steel pipe joint firmness poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing a welding process which has good welding firmness, no sharp corner at a joint, safe use, improved mechanical strength at a welding seam of a steel pipe and reduced production cost.
In order to solve the technical problem, the invention provides a welding process, which comprises the following steps:
the method comprises the following steps: cutting;
beveling the butt joint of the connecting pipe, performing beveling cutting at different angles according to different pipe specifications, and performing grinding treatment on the cut part by adopting a grinding machine to enable the outer surface of the cut part to be in a smooth state;
step two: pressing an angle;
the method comprises the following steps that a fillet pressing die is adopted to press and bend the cut part of a single tube, a travel switch is arranged on the pressing die and used for controlling the depth of a pressing angle, the depth range of the pressing angle is larger than or equal to R3, the pressing time is 3-6s, the pressure value is 8-12t, the pressing modes are different according to different shapes of tube bodies, the tube bodies are pressed in a parallel arrangement mode when being cylindrical, the tube bodies are pressed in a vertical arrangement mode when being elliptical, an arc transition section structure is formed after pressing, the safety standard is met, and the surfaces of the tube bodies are polished after pressing;
step three: welding;
different welding modes are adopted according to different shapes of the pipe body, the position of the joint of the pipe body has large fluctuant circular arc, the splicing gap is more than 0.3mm, a spot welding mode is adopted, two or more than two single pipes with equal thickness are arranged on a flanging joint, the total fusion depth is more than or equal to 0.7 wall thickness, a welding wire is attached to the spot welding position, an electrode reaches the welding position, the edge distance, the lap joint quantity, the point distance, the assembly gap and the welding spot strength value are set, the edge distance takes the minimum value according to the distance of the single pipes, the center distance between the point and two adjacent points is related to the thickness, the electric conductivity, the surface cleanliness and the diameter of a nugget, a controller for changing the current of each point is adopted, the compensation and the current distribution can be carried out, the assembly gap is 0.1-2mm, the welding position is punctiform, the position of the joint of the pipe body has small fluctuant position, the splicing gap is, the welding position is smooth and linear, the weld reinforcement between the multiple layers after welding is less than 0.8mm, and the contact surface of the whole connecting position 2/3 is welded;
step four: polishing;
during polishing, a polishing wheel rotating at a high speed presses a welding position, so that the abrasive material rolls and cuts the surface of the welding pipe body in a micro-scale manner to form a bright processing surface, and the surface roughness reaches Ra0.63-0.01 microns;
step five: welding a contact surface 1/3 at the corner by adopting a spot welding or flow welding mode according to different radians;
step six: performing weld seam appearance inspection on the welded pipe body after welding, and performing subsequent paint spraying appearance treatment
Preferably, the welding groove is U-shaped during welding.
Preferably, the included angle between the welding wire and the horizontal plane of the welding direction is 65-75 degrees.
Preferably, the connecting tube is stainless steel or a low alloy material.
After adopting the structure, the invention has the advantages that:
the method is characterized in that a fillet pressing die is adopted to press and bend the cut part of the single tube, a travel switch is arranged on the pressing die and used for controlling the depth of a pressing angle, the depth range of the pressing angle is larger than or equal to R3, the pressing time is 3-6s, the pressure value is 8-12t, different pressing modes are adopted according to different tube shapes, different welding modes are adopted according to different tube shapes, the position of the tube body joint is fluctuated and has a large circular arc, a splicing gap is larger than 0.3mm, a spot welding mode is adopted, the position of the tube body joint is fluctuated and has a small position, the splicing gap is smaller than 0.3mm, a flow welding mode is adopted, a welding wire covers the joint for pull welding, the welding position is smooth and linear, the welding seam allowance between the composite layers after welding is smaller than 0.8mm, the application adopts the fillet pressing mode to enable the splicing position to be in smooth transition and have no sharp-, the welding firmness is better, the production efficiency is improved, the production cost is reduced, the mechanical strength of the welding seam of the steel pipe is improved, the subsequent polishing treatment work is reduced, and the yield is improved.
Detailed Description
The present invention will be described in detail with reference to the following detailed description, which should not be construed as limiting the invention;
the first embodiment is as follows:
a welding process, the welding steps are as follows:
the method comprises the following steps: cutting;
beveling the butt joint of the connecting pipe with the cylindrical structure, and performing grinding treatment on the cut part by adopting a grinding machine to enable the outer surface of the connecting pipe to be in a smooth state;
step two: pressing an angle;
the method comprises the following steps that a fillet pressing die is adopted to press and bend the cut part of a single tube, a travel switch is arranged on the pressing die and used for controlling the depth of a pressing angle, the depth range of the pressing angle is not less than R3, the pressing time is 3-6s, the pressure value is 8-12t, when the tube body is of a cylindrical structure, the pressing mode is a parallel arrangement mode according to different pressing modes of the tube body, an arc transition section structure is formed after the pressing, the safety standard is met, and the surface of the tube body is polished after the pressing;
step three: welding;
the welding wire is adhered to the spot welding position, an electrode reaches the welding position, the edge distance, the lap joint quantity, the point distance, the assembly gap and the welding spot strength value are set, the edge distance takes the minimum value according to the distance between the single tubes, the center distance between the point and the adjacent two points is related to the thickness, the electric conductivity, the surface cleanliness and the diameter of a nugget, a controller for changing the current of each point is adopted, the compensation and the shunting can be carried out, the assembly gap is 0.1-2mm, the welding position is in a point shape, the position of the connecting position of the tube body is in a small fluctuation position, the splicing gap is less than 0.3mm, the flow welding mode is adopted, the welding wire is covered on the connecting position for drawing welding, the welding position is in a smooth linear shape, and the weld seam surplus height between the compound layers after welding is less than 0.8mm, welding the entire junction 2/3 interface;
step four: polishing;
during polishing, a polishing wheel rotating at a high speed presses a welding position, so that the abrasive material rolls and cuts the surface of the welding pipe body in a micro-scale manner to form a bright processing surface, and the surface roughness reaches Ra0.63-0.01 microns;
step five: welding a contact surface at the corner 1/3 in a spot welding manner;
step six: performing weld seam appearance inspection on the welded pipe body after welding, and performing subsequent paint spraying appearance treatment
And a welding groove is U-shaped during welding, an included angle between the welding wire and the horizontal plane of the welding direction is 65-75 degrees, and the connecting pipe is made of stainless steel or low alloy material.
Example two:
a welding process, the welding steps are as follows:
the method comprises the following steps: cutting;
beveling the butt joint of the connecting pipes, and performing sanding treatment on the cut part by using a grinding machine to enable the outer surface of the connecting pipe to be in a smooth state;
step two: pressing an angle;
the method comprises the following steps that a fillet pressing die is adopted to press and bend the cut part of a single tube, a travel switch is arranged on the pressing die and used for controlling the depth of a pressing angle, the depth range of the pressing angle is larger than or equal to R3, the pressing time is 3-6s, the pressure value is 8-12t, when the tube body is of an oval structure, the tube body is pressed into a vertical arrangement mode, an arc transition section structure is formed after pressing, the safety standard is met, and the surface of the tube body is polished after pressing;
step three: welding;
the welding wire is adhered to the spot welding position, an electrode reaches the welding position, the edge distance, the lap joint quantity, the point distance, the assembly gap and the welding spot strength value are set, the edge distance takes the minimum value according to the distance between the single tubes, the center distance between the point and the adjacent two points is related to the thickness, the electric conductivity, the surface cleanliness and the diameter of a nugget, a controller for changing the current of each point is adopted, the compensation and the shunting can be carried out, the assembly gap is 0.1-2mm, the welding position is in a point shape, the position of the connecting position of the tube body is in a small fluctuation position, the splicing gap is less than 0.3mm, the flow welding mode is adopted, the welding wire is covered on the connecting position for drawing welding, the welding position is in a smooth linear shape, and the weld seam surplus height between the compound layers after welding is less than 0.8mm, welding the entire junction 2/3 interface;
step four: polishing;
during polishing, a polishing wheel rotating at a high speed presses a welding position, so that the abrasive material rolls and cuts the surface of the welding pipe body in a micro-scale manner to form a bright processing surface, and the surface roughness reaches Ra0.63-0.01 microns;
step five: welding a contact surface of the pressure corner 1/3 in a flow welding mode;
step six: and (5) carrying out welding seam appearance inspection on the welded pipe body after welding, and carrying out subsequent paint spraying appearance treatment.
Claims (3)
1. A welding process, characterized in that: the welding steps are as follows:
the method comprises the following steps: cutting;
beveling the butt joint of the connecting pipe, performing beveling cutting at different angles according to different pipe specifications, and performing grinding treatment on the cut part by adopting a grinding machine to enable the outer surface of the cut part to be in a smooth state;
step two: pressing an angle;
the method comprises the following steps that a fillet pressing die is adopted to press and bend the cut part of a single tube, a travel switch is arranged on the pressing die and used for controlling the depth of a pressing angle, the depth range of the pressing angle is larger than or equal to R3, the pressing time is 3-6s, the pressure value is 8-12t, the pressing modes are different according to different shapes of tube bodies, the tube bodies are pressed in a parallel arrangement mode when being cylindrical, the tube bodies are pressed in a vertical arrangement mode when being elliptical, the pressed tube bodies are in an arc transition section structure, and the surfaces of the tube bodies are polished after being pressed;
step three: welding;
different welding modes are adopted according to different pipe shapes, the position of the pipe body joint has large fluctuant circular arc, the splicing gap is more than 0.3mm, a spot welding mode is adopted, more than two single pipes with equal thickness are arranged on a flanging joint, the fusion depth is fully covered by more than or equal to 0.7 wall thickness, a welding wire is attached to the spot welding position, an electrode reaches the welding position, the side distance, the lap joint quantity, the point distance, the assembly gap and the welding spot strength value are set, the side distance takes the minimum value according to the distance of the single pipes, the center distance between the point and two adjacent points is related to the thickness, the electric conductivity, the surface cleanliness and the diameter of a nugget, a controller for changing the current of each point is adopted to carry out compensation and shunt, the assembly gap is 0.1-2mm, the welding position is in a point shape, the position of the pipe body joint has small fluctuant position, the splicing gap is less than 0.3mm, a flow welding mode is adopted, welding surplus height between the multiple layers after welding is less than 0.8mm, welding the contact surface of the whole joint 2/3, and enabling an included angle between the welding wire and a horizontal plane of a welding direction to be 65-75 degrees;
step four: polishing;
during polishing, a polishing wheel rotating at a high speed presses a welding position, so that the abrasive material rolls and cuts the surface of the welding pipe body in a micro-scale manner to form a bright processing surface, and the surface roughness reaches Ra0.63-0.01 microns;
step five: welding a contact surface 1/3 at the corner by adopting a spot welding or flow welding mode according to different radians;
step six: and (5) carrying out welding seam appearance inspection on the welded pipe body after welding, and carrying out subsequent paint spraying appearance treatment.
2. The welding process of claim 1, wherein: and a welding groove is U-shaped during welding.
3. The welding process of claim 1, wherein: the connecting pipe is made of stainless steel or low alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810824876.6A CN108673055B (en) | 2018-07-25 | 2018-07-25 | Welding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810824876.6A CN108673055B (en) | 2018-07-25 | 2018-07-25 | Welding process |
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| Publication Number | Publication Date |
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| CN108673055A CN108673055A (en) | 2018-10-19 |
| CN108673055B true CN108673055B (en) | 2020-04-21 |
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| CN201810824876.6A Active CN108673055B (en) | 2018-07-25 | 2018-07-25 | Welding process |
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| CN111408909A (en) * | 2020-05-08 | 2020-07-14 | 安徽伟宏钢结构集团股份有限公司 | Production welding process for forged steel parts |
| CN113458692B (en) * | 2021-07-19 | 2023-05-23 | 四川华体照明科技股份有限公司 | Multi-edge rod welding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100453875C (en) * | 2004-06-02 | 2009-01-21 | 俞廷标 | Method for processing stainless steel/carbon steel composite pipe |
| CN101158430A (en) * | 2006-10-08 | 2008-04-09 | 阎金波 | Manufacturing method with curvature thin wall stainless steel pipe fittings |
| CN101954539B (en) * | 2010-10-01 | 2012-12-19 | 广东美的电器股份有限公司 | Friction welding process for copper material and aluminum alloy material |
| CN102588702B (en) * | 2012-03-14 | 2013-09-11 | 江苏三汇联发管业有限公司 | Corrosion-resistant alloy lined composite mitre elbow and manufacturing method thereof |
| CN202741598U (en) * | 2012-08-31 | 2013-02-20 | 古交市银河镁业有限公司 | Adjustable magnesium alloy profile bending mold |
| CN104588844B (en) * | 2014-11-27 | 2016-11-30 | 芜湖中集瑞江汽车有限公司 | A kind of welding procedure of steel plate |
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| TR01 | Transfer of patent right |
Effective date of registration: 20211209 Address after: 214000 area a, Yangjian Town Industrial Park, Xishan District, Wuxi City, Jiangsu Province Patentee after: WUXI TIANLI METAL TECHNOLOGY CO.,LTD. Address before: Building G12, No. 9, Xinglin Road, Yaocheng Avenue, Taizhou, Jiangsu 225300 Patentee before: Zhang He |
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Effective date of registration: 20231228 Address after: No. 50 Jiaoyang Road, Zone B, Yangjian Town Industrial Park, Xishan District, Wuxi City, Jiangsu Province, 214107 Patentee after: Wuxi Hechang Machinery Manufacturing Co.,Ltd. Address before: 214000 area a, Yangjian Town Industrial Park, Xishan District, Wuxi City, Jiangsu Province Patentee before: WUXI TIANLI METAL TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |