CN112372171A - Welding process of steel pipe for automobile - Google Patents
Welding process of steel pipe for automobile Download PDFInfo
- Publication number
- CN112372171A CN112372171A CN202011316431.0A CN202011316431A CN112372171A CN 112372171 A CN112372171 A CN 112372171A CN 202011316431 A CN202011316431 A CN 202011316431A CN 112372171 A CN112372171 A CN 112372171A
- Authority
- CN
- China
- Prior art keywords
- welding
- steel pipe
- steel
- steel pipes
- pipes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0538—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor for rotating tubes, e.g. rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a welding process of an automobile steel pipe, which comprises the following steps: performing acid cleaning on the inner surface and the outer surface of the steel pipe by using a high-pressure cleaner, and then wiping the steel pipe for later use; respectively placing two steel pipes on two welding roller frames, and adjusting the welding seam distance of the two steel pipes to be 10-12 mm; the steel pipe is driven to rotate for 3-4 circles per minute by a welding roller carrier; adjusting a welding gun on a welding machine to be positioned in the center of a welding seam and in a direction deviating 40mm from the center of the steel pipe, wherein the deviation direction of the welding gun is consistent with the rotation direction of the steel pipe; respectively carrying out external welding and internal welding on the welding seams of the two steel pipes by using an automatic welding frame; and (3) soaking the steel pipe in a manganese phosphate phosphating solution for phosphating to obtain the steel pipe. The steel pipe welded by the invention has high processing precision and stable quality, and the straightness of the common steel pipe is lower than 1 mm/m.
Description
Technical Field
The invention relates to the technical field of steel pipe welding, in particular to a welding process of an automobile steel pipe.
Background
Steel pipes are steel with a hollow cross section whose length is much greater than the diameter or circumference. The steel pipe is divided into round, square, rectangular and special-shaped steel pipes according to the shape of the cross section; the steel pipe is divided into a carbon structural steel pipe, a low-alloy structural steel pipe, an alloy steel pipe and a composite steel pipe according to the material quality; the steel pipes are divided into steel pipes for conveying pipelines, engineering structures, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, high-pressure equipment and the like according to the application; in many occasions, two steel pipes need to be welded together due to the length, the existing welding process is formed by manually melting and connecting welding flux and metal at a joint at the welding seam, and after the welding seam is cooled, the two steel pipes are connected into a whole.
The invention provides a welding process of a steel pipe for an automobile, aiming at improving the safety of the welded steel pipe for the automobile.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a welding process of a steel pipe for an automobile.
The technical scheme of the invention is as follows:
a welding process of a steel pipe for an automobile comprises the following steps:
A. performing acid cleaning on the inner surface and the outer surface of the steel pipe by using a high-pressure cleaner, and then wiping the steel pipe for later use;
B. respectively placing two steel pipes on two welding roller frames, and adjusting the welding seam distance of the two steel pipes to be 10-12 mm;
C. the steel pipe is driven to rotate for 3-4 circles per minute by a welding roller carrier;
D. adjusting a welding gun on a welding machine to be positioned in the center of a welding seam and in a direction deviating 40mm from the center of the steel pipe, wherein the deviation direction of the welding gun is consistent with the rotation direction of the steel pipe;
E. respectively carrying out outer welding and inner welding on the welding seams of the two steel pipes by using an automatic welding frame, wherein the current of a welding machine on the automatic welding frame during the outer welding is 650-700A, the voltage is 40V, the current of the welding machine on the automatic welding frame during the inner welding is 800A, and the voltage is 45V;
F. and soaking the steel pipe in the manganese phosphate phosphating solution for 30-40 min.
Preferably, in the step a, the acidic cleaning agent is composed of the following components in percentage by weight: 3-8% of oleic acid, 1-3% of corrosion inhibitor, 2-5% of fog inhibitor and the balance of water.
Preferably, in the step A, the pressure of the high-pressure cleaner is 10-15 MPa.
Preferably, in the step E, during welding, a protective gas is used to protect the welding point.
Further preferably, the protective gas is argon or nitrogen.
Preferably, welding distortion affecting quality and appearance is corrected by flame or machinery after welding is completed.
The invention has the advantages that: the welding process of the steel pipe for the automobile comprises the following steps of: performing acid cleaning on the inner surface and the outer surface of the steel pipe by using a high-pressure cleaner, and then wiping the steel pipe for later use; respectively placing two steel pipes on two welding roller frames, and adjusting the welding seam distance of the two steel pipes to be 10-12 mm; the steel pipe is driven to rotate for 3-4 circles per minute by a welding roller carrier; adjusting a welding gun on a welding machine to be positioned in the center of a welding seam and in a direction deviating 40mm from the center of the steel pipe, wherein the deviation direction of the welding gun is consistent with the rotation direction of the steel pipe; respectively carrying out external welding and internal welding on the welding seams of the two steel pipes by using an automatic welding frame; and (3) soaking the steel pipe in a manganese phosphate phosphating solution for phosphating to obtain the steel pipe. The steel pipe welded by the invention has high processing precision and stable quality, and the straightness of the common steel pipe is lower than 1 mm/m.
Detailed Description
Example 1
A welding process of a steel pipe for an automobile comprises the following steps:
A. performing acid cleaning on the inner surface and the outer surface of the steel pipe by using a high-pressure cleaner, and then wiping the steel pipe for later use;
B. respectively placing two steel pipes on two welding roller frames, and adjusting the welding seam distance of the two steel pipes to be 10-12 mm;
C. the steel pipe is driven to rotate for 3 circles per minute by a welding roller carrier;
D. adjusting a welding gun on a welding machine to be positioned in the center of a welding seam and in a direction deviating 40mm from the center of the steel pipe, wherein the deviation direction of the welding gun is consistent with the rotation direction of the steel pipe;
E. respectively carrying out outer welding and inner welding on the welding seams of the two steel pipes by using an automatic welding frame, wherein the current of a welding machine on the automatic welding frame during the outer welding is 700A, the voltage is 40V, and the current of the welding machine on the automatic welding frame during the inner welding is 800A, and the voltage is 45V;
F. and soaking the steel pipe in the manganese phosphate phosphating solution for 30 min.
In the step A, the acidic cleaning agent comprises the following components in percentage by weight: 8% of oleic acid, 1% of corrosion inhibitor, 5% of mist inhibitor and the balance of water.
In the step A, the pressure of the high-pressure cleaner is 10 MPa.
In the step E, protective gas is used for protecting welding spots during welding; the protective gas is argon or nitrogen.
Welding deformation affecting quality and appearance is corrected by flame or machinery after welding is finished.
Example 2
A welding process of a steel pipe for an automobile comprises the following steps:
A. performing acid cleaning on the inner surface and the outer surface of the steel pipe by using a high-pressure cleaner, and then wiping the steel pipe for later use;
B. respectively placing two steel pipes on two welding roller frames, and adjusting the welding seam distance of the two steel pipes to be 10-12 mm;
C. the steel pipe is driven to rotate for 3 circles per minute by a welding roller carrier;
D. adjusting a welding gun on a welding machine to be positioned in the center of a welding seam and in a direction deviating 40mm from the center of the steel pipe, wherein the deviation direction of the welding gun is consistent with the rotation direction of the steel pipe;
E. respectively carrying out outer welding and inner welding on the welding seams of the two steel pipes by using an automatic welding frame, wherein the current of a welding machine on the automatic welding frame during the outer welding is 650A, the voltage is 40V, and the current of the welding machine on the automatic welding frame during the inner welding is 800A, and the voltage is 45V;
F. and soaking the steel pipe in the manganese phosphate phosphating solution for 40 min.
In the step A, the acidic cleaning agent comprises the following components in percentage by weight: 3% of oleic acid, 3% of corrosion inhibitor, 2% of fog inhibitor and the balance of water.
In the step A, the pressure of the high-pressure cleaner is 15 MPa.
In the step E, protective gas is used for protecting welding spots during welding; the protective gas is argon or nitrogen.
Welding deformation affecting quality and appearance is corrected by flame or machinery after welding is finished.
Example 3
A welding process of a steel pipe for an automobile comprises the following steps:
A. performing acid cleaning on the inner surface and the outer surface of the steel pipe by using a high-pressure cleaner, and then wiping the steel pipe for later use;
B. respectively placing two steel pipes on two welding roller frames, and adjusting the welding seam distance of the two steel pipes to be 10-12 mm;
C. the steel pipe is driven to rotate for 3 circles per minute by a welding roller carrier;
D. adjusting a welding gun on a welding machine to be positioned in the center of a welding seam and in a direction deviating 40mm from the center of the steel pipe, wherein the deviation direction of the welding gun is consistent with the rotation direction of the steel pipe;
E. respectively carrying out outer welding and inner welding on the welding seams of the two steel pipes by using an automatic welding frame, wherein the current of a welding machine on the automatic welding frame during the outer welding is 670A, the voltage is 40V, and the current of the welding machine on the automatic welding frame during the inner welding is 800A, and the voltage is 45V;
F. and soaking the steel pipe in the manganese phosphate phosphating solution for 35 min.
In the step A, the acidic cleaning agent comprises the following components in percentage by weight: 5.5 percent of oleic acid, 1.2 percent of corrosion inhibitor, 3.5 percent of fog inhibitor and the balance of water.
In the step A, the pressure of the high-pressure cleaner is 12 MPa.
In the step E, protective gas is used for protecting welding spots during welding; the protective gas is argon or nitrogen.
Welding deformation affecting quality and appearance is corrected by flame or machinery after welding is finished.
The steel pipes for automobiles obtained in examples 1 to 3 had straightness of less than 1mm/m and an average of 0.078 mm/m.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The welding process of the steel pipe for the automobile is characterized by comprising the following steps of:
A. performing acid cleaning on the inner surface and the outer surface of the steel pipe by using a high-pressure cleaner, and then wiping the steel pipe for later use;
B. respectively placing two steel pipes on two welding roller frames, and adjusting the welding seam distance of the two steel pipes to be 10-12 mm;
C. the steel pipe is driven to rotate for 3-4 circles per minute by a welding roller carrier;
D. adjusting a welding gun on a welding machine to be positioned in the center of a welding seam and in a direction deviating 40mm from the center of the steel pipe, wherein the deviation direction of the welding gun is consistent with the rotation direction of the steel pipe;
E. respectively carrying out outer welding and inner welding on the welding seams of the two steel pipes by using an automatic welding frame, wherein the current of a welding machine on the automatic welding frame during the outer welding is 650-700A, the voltage is 40V, the current of the welding machine on the automatic welding frame during the inner welding is 800A, and the voltage is 45V;
F. and soaking the steel pipe in the manganese phosphate phosphating solution for 30-40 min.
2. A welding process of steel pipes for automobiles as claimed in claim 1, wherein in the step A, the acidic cleaning agent comprises the following components by weight percent: 3-8% of oleic acid, 1-3% of corrosion inhibitor, 2-5% of fog inhibitor and the balance of water.
3. A process for welding steel pipes for automobiles according to claim 1, wherein in the step A, the pressure of the high pressure cleaner is 10 to 15 MPa.
4. A process for welding steel pipes for automobiles according to claim 1, wherein in the step E, the welding points are protected by a shielding gas during welding.
5. A process for welding steel tubes for automobiles according to claim 4, wherein the shielding gas is argon or nitrogen.
6. A process for welding steel pipes for automobiles according to claim 1, wherein welding deformation affecting quality and appearance is corrected by flame or machine after the welding is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011316431.0A CN112372171A (en) | 2020-11-23 | 2020-11-23 | Welding process of steel pipe for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011316431.0A CN112372171A (en) | 2020-11-23 | 2020-11-23 | Welding process of steel pipe for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112372171A true CN112372171A (en) | 2021-02-19 |
Family
ID=74587210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011316431.0A Pending CN112372171A (en) | 2020-11-23 | 2020-11-23 | Welding process of steel pipe for automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112372171A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2163340A1 (en) * | 2001-11-21 | 2010-03-17 | Dana Canada Corporation | Improvements in fluxless brazing |
| CN101876078A (en) * | 2010-07-08 | 2010-11-03 | 南通飞拓生物科技有限公司 | Additive for pickling degreasing and derusting of steel |
| CN104668908A (en) * | 2015-01-30 | 2015-06-03 | 绵阳市嘉炜不锈钢有限公司 | Stainless steel welded steel pipe machining process |
| CN104985293A (en) * | 2015-06-30 | 2015-10-21 | 柳州金茂机械有限公司 | Steel tube welding technology |
| CN106811745A (en) * | 2015-11-30 | 2017-06-09 | 广汉市川西机电备件有限责任公司 | A kind of steel tube surface handling process |
| CN110722279A (en) * | 2019-09-11 | 2020-01-24 | 珠海东方重工有限公司 | Steel pipe butt welding process |
-
2020
- 2020-11-23 CN CN202011316431.0A patent/CN112372171A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2163340A1 (en) * | 2001-11-21 | 2010-03-17 | Dana Canada Corporation | Improvements in fluxless brazing |
| CN101876078A (en) * | 2010-07-08 | 2010-11-03 | 南通飞拓生物科技有限公司 | Additive for pickling degreasing and derusting of steel |
| CN104668908A (en) * | 2015-01-30 | 2015-06-03 | 绵阳市嘉炜不锈钢有限公司 | Stainless steel welded steel pipe machining process |
| CN104985293A (en) * | 2015-06-30 | 2015-10-21 | 柳州金茂机械有限公司 | Steel tube welding technology |
| CN106811745A (en) * | 2015-11-30 | 2017-06-09 | 广汉市川西机电备件有限责任公司 | A kind of steel tube surface handling process |
| CN110722279A (en) * | 2019-09-11 | 2020-01-24 | 珠海东方重工有限公司 | Steel pipe butt welding process |
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Application publication date: 20210219 |
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| RJ01 | Rejection of invention patent application after publication |