CN110900020A - Anti-deformation welding process for large-length box-shaped structural member - Google Patents
Anti-deformation welding process for large-length box-shaped structural member Download PDFInfo
- Publication number
- CN110900020A CN110900020A CN201911174819.9A CN201911174819A CN110900020A CN 110900020 A CN110900020 A CN 110900020A CN 201911174819 A CN201911174819 A CN 201911174819A CN 110900020 A CN110900020 A CN 110900020A
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- welding
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- guide wheel
- trolley
- structural member
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- 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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic 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
- 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
- B23K37/02—Carriages for supporting the welding or cutting element
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides an anti-deformation welding process for a long box type structural member, which solves the problem of welding deformation control of a long straight weld joint by adjusting the position of the long box type structural member, adjusting a welding method, optimizing a welding path and a welding sequence and adjusting welding parameters, can completely realize automatic tracking without manual intervention, and reduces the level requirement and labor intensity of welding operators.
Description
Technical Field
The invention belongs to the technical field of welding processes, and particularly relates to an anti-deformation welding process for a large-length box-shaped structural member.
Background
The large and long box-shaped structural member is fixed mainly by welding, the existing welding and placing mode of the large and long box-shaped structural member in the welding process is shown in figure 3, the vertical plate 2 is vertical, and the cover plate 3 is horizontal. The semi-automatic welding trolley has the following problems in welding: on one hand, the height of the trolley is 290mm, and the height of a welding gun is added, so that the welding gun cannot be laterally absorbed on the vertical plate for welding operation; on the other hand, the welding operation of the large and long straight box type structural member is performed on multiple platforms, the operation platform is formed by combining multiple platforms, does not have a continuous and flat horizontal plane, and cannot be used as a walking supporting surface of the welding trolley, so that a welding trolley operation track needs to be specially paved, the production cost is high, and the operation efficiency is influenced. In addition, for producing a box-type structural member of a certain vehicle type, only the welding efficiency of 4 outer welding seams is considered, interference of other factors is eliminated, and through on-site writing, 4 welders are needed in the existing welding operation, uninterrupted continuous operation is needed, 5.5-6 hours are needed, and the labor intensity of the welders is very high. There is therefore a need for improvements.
Disclosure of Invention
The technical problems solved by the invention are as follows: the invention provides an anti-deformation welding process for a long box type structural member, which solves the problem of welding deformation control of a long straight weld joint by adjusting the position of the long box type structural member, adjusting a welding method, optimizing a welding path and a welding sequence and adjusting welding parameters, can completely realize automatic tracking without manual intervention, and reduces the level requirement and labor intensity of welding operators.
The technical scheme adopted by the invention is as follows: the deformation-preventing welding process for the large-length box-type structural member comprises the following steps of;
1) adjusting the position of the large long box type structural member: placing a long box-shaped structural member formed by combining a vertical plate and a cover plate horizontally according to the vertical plate;
2) adjusting a welding method: taking the welding seam as a reference, and taking the upper end face of the vertical plate as a walking supporting face of the semi-automatic welding trolley, so that the semi-automatic welding trolley walks along the length direction of the upper end face of the upper vertical plate to weld the welding seam between a cover plate and the vertical plate; the front and rear parts of the semi-automatic welding trolley along the walking direction and one side of the welded cover plate are respectively provided with a front guide wheel and a rear guide wheel, the front guide wheel and the rear guide wheel roll along the outer side surface of the welded cover plate in the walking process of the semi-automatic welding trolley, the walking direction of the semi-automatic welding trolley forms a certain angle with the surface of the welded cover plate, so that the front guide wheel and the rear guide wheel are tightly attached to the corresponding cover plate surface by utilizing oblique tension in the walking process of the semi-automatic welding trolley, and the purpose of tracking the welding line in real time by utilizing the guide wheel to reversely hang and obliquely walk is achieved;
3) adopting a cross sectional symmetrical welding sequence: sequentially welding four welding seams formed by combining the vertical plate and the cover plate by adopting a diagonal crossing welding sequence, namely crossing; for each welding seam, two semi-automatic welding trolleys are adopted to symmetrically weld from the middle to two sides simultaneously, namely the welding seam is in sectional symmetric welding;
4) adjusting welding parameters: for the welding seam without groove opening, determining welding parameters according to design requirements; for the open-slope welding seam, two layers of welding are adopted, one layer is bottomed, and the other layer is covered.
In the step 2), the walking direction of the semi-automatic welding trolley and the welded cover plate surface form an angle of 5 degrees.
In the step 2), the front guide wheel is connected with the semi-automatic welding trolley through a front connecting support, the rear guide wheel is connected with the semi-automatic welding trolley through a rear connecting support, and the front connecting support of the front guide wheel is longer than the rear connecting support of the rear guide wheel.
In the step 4), in the two-layer two-pass welding of the open-slope mouth welding seam, the first welding seam is: the current is 260-280A, the voltage is 28-30V, the welding speed is 75min/cm, and a second welding seam: the current is 300-320A, the voltage is 32-35V, and the welding speed is 35 min/cm.
Compared with the prior art, the invention has the advantages that:
1. according to the scheme, the welding deformation control problem of the long straight welding seam is solved by adjusting the position of the long box type structural member, adjusting the welding method, optimizing the welding path and the welding sequence and adjusting the welding parameters, automatic tracking can be completely realized, manual intervention is not needed, and the horizontal requirement and labor intensity of welding operators are reduced.
2. The guide wheel is reversely hung and obliquely travels, so that the purpose of tracking the welding seam in real time is realized by the semi-automatic welding trolley, the control of the welding quality of the long and large straight box type structural member in a natural state, particularly the control of welding deformation is ensured, the long and large straight box type structural member is prevented from being distorted and bent after being welded, the appearance of the welding seam is smooth, flat and bright, and the welding quality is obviously superior to that of the welding seam in the prior art.
3. Welding is executed through this scheme, only needs two operative employee cooperation operation tilting mechanism, and the same box structure of welding completion needs 5.5 hours, makes work efficiency promote one time, very big reduction investment cost, reduces operator intensity of labour.
Drawings
FIG. 1 is a schematic view of a welding process of the present invention;
FIG. 2 is a structural diagram of a large rectangular box-shaped structural member in a welding and placing state;
FIG. 3 is a structural diagram of a welding and placing state of a medium and large long box type structural member in the prior art;
FIG. 4 is an external view of a weld joint using the present invention;
fig. 5 is an external view of a weld using the prior art.
Detailed Description
The present invention will now be described in detail with reference to the specific embodiments shown in fig. 1-5, wherein the exemplary embodiments and descriptions of the present invention are provided to illustrate the present invention, but not to limit the present invention.
The deformation-preventing welding process for the large-length box-type structural member comprises the following steps of; as shown in figures 1 and 2 of the drawings,
1) adjusting the position of the large long box type structural member: horizontally placing a long box-shaped structural member 1 formed by combining a vertical plate 2 and a cover plate 3 according to the vertical plate 2;
2) adjusting a welding method: the welding seam is taken as a reference, the welding seam taken as the reference is a set of welding seams to be welded, the upper end surface of the vertical plate 2 is taken as a walking supporting surface of the semi-automatic welding trolley 4, so that the semi-automatic welding trolley 4 walks along the length direction of the upper end surface of the vertical plate 2 which is horizontally placed and positioned at the upper part, and the welding seam between the cover plate 3 and the vertical plate 2 is welded; the front and rear parts of the semi-automatic welding trolley 4 in the walking direction and one side of the welded cover plate 3 are respectively provided with a front guide wheel 5 and a rear guide wheel 7, the front guide wheel 5 and the rear guide wheel 7 roll along the outer side surface of the welded cover plate 3 in the walking process of the semi-automatic welding trolley 4, a certain angle is formed between the walking direction of the semi-automatic welding trolley 4 and the surface of the welded cover plate 3, preferably, the angle formed between the walking direction of the semi-automatic welding trolley 4 and the surface of the welded cover plate 3 is 5 degrees, so that the semi-automatic welding trolley 4 utilizes oblique pulling force to enable the front guide wheel 5 and the rear guide wheel 7 to be tightly attached to the surface of the corresponding cover plate 3 in the walking process, and the purpose of tracking a welding head in real time by utilizing the guide wheel to reversely hang and obliquely walk is achieved. The front guide wheel 5 is connected with the semi-automatic welding trolley 4 through a front connecting support 6, the rear guide wheel 7 is connected with the semi-automatic welding trolley 4 through a rear connecting support 8, the front connecting support 6 of the front guide wheel 5 is longer than the rear connecting support 8 of the rear guide wheel 7, and therefore the semi-automatic welding trolley 4 is enabled to run and incline. In the step, the guide wheel is reversely hung and obliquely moved, so that the semi-automatic welding trolley 4 can track the welding seam in real time, the control of the welding quality of the long and large straight box type structural member in a natural state, particularly the control of welding deformation is ensured, the long and large straight box type structural member is prevented from being distorted and bent after being welded, and the welding seam is smooth, flat and bright in appearance.
3) Adopting a cross sectional symmetrical welding sequence: sequentially welding four welding seams formed by combining the vertical plate 2 and the cover plate 3 by adopting a diagonal crossing welding sequence, namely crossing; for each welding seam, two semi-automatic welding trolleys 4 are adopted to symmetrically weld from the middle to two sides simultaneously, namely the welding seam is in sectional symmetric welding;
4) adjusting welding parameters: for the welding seam without groove opening, determining welding parameters according to design requirements; for the open-slope mouth welding seam, two layers of welding are adopted, one layer is bottoming, the other layer is capping, the first welding seam: the current is 260-280A, the voltage is 28-30V, the welding speed is 75min/cm, and a second welding seam: the current is 300-320A, the voltage is 32-35V, and the welding speed is 35 min/cm.
Fig. 4 shows an appearance of a welding seam completed by the technical scheme of the invention, fig. 5 shows an appearance of a welding seam completed by the prior art, and a comparison between fig. 4 and fig. 5 shows that the welding seam of the invention has smooth, flat and bright appearance and welding quality obviously superior to the welding seam of the prior art.
According to the invention, the welding deformation control problem of the long straight weld joint is solved by adjusting the position of the long box type structural member, adjusting the welding method, optimizing the welding path and the welding sequence and adjusting the welding parameters, automatic tracking can be completely realized, manual intervention is not needed, and the horizontal requirement and labor intensity of welding operators are reduced.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (4)
1. A shape welding process of preapring for an unfavorable turn of events for big rectangular box structure, its characterized in that: comprises the following steps;
1) adjusting the position of the large long box type structural member: horizontally placing a long box-shaped structural member (1) formed by combining a vertical plate (2) and a cover plate (3) according to the vertical plate (2);
2) adjusting a welding method: taking the welding seam as a reference, and taking the upper end surface of the vertical plate (2) as a walking supporting surface of the semi-automatic welding trolley (4), so that the semi-automatic welding trolley (4) walks along the length direction of the upper end surface of the upper vertical plate (2) to weld the welding seam between a cover plate (3) and the vertical plate (2); the front and rear parts of the semi-automatic welding trolley (4) in the walking direction and one side of the welded cover plate (3) are respectively provided with a front guide wheel (5) and a rear guide wheel (7), the front guide wheel (5) and the rear guide wheel (7) roll along the outer side surface of the welded cover plate (3) in the walking process of the semi-automatic welding trolley (4), and a certain angle is formed between the walking direction of the semi-automatic welding trolley (4) and the surface of the welded cover plate (3), so that the front guide wheel (5) and the rear guide wheel (7) are tightly attached to the corresponding surface of the cover plate (3) by oblique tension in the walking process of the semi-automatic welding trolley (4), and the purpose of tracking the welding head of a welding gun in real time by utilizing the guide wheels to reversely hang and obliquely walk is achieved;
3) adopting a cross sectional symmetrical welding sequence: sequentially welding four welding seams formed by combining the vertical plate (2) and the cover plate (3) by adopting a diagonal crossing welding sequence, namely crossing; for each welding seam, two semi-automatic welding trolleys (4) are adopted to symmetrically weld from the middle to two sides simultaneously, namely the welding seam is in sectional symmetric welding;
4) adjusting welding parameters: for the welding seam without groove opening, determining welding parameters according to design requirements; for the open-slope welding seam, two layers of welding are adopted, one layer is bottomed, and the other layer is covered.
2. The deformation-preventing welding process for the large-length box-shaped structural member as claimed in claim 1, which is characterized in that: in the step 2), the walking direction of the semi-automatic welding trolley (4) and the surface of the welded cover plate (3) form an angle of 5 degrees.
3. The deformation-preventing welding process for the large-length box-shaped structural member as claimed in claim 1 or 2, which is characterized in that: in the step 2), the front guide wheel (5) is connected with the semi-automatic welding trolley (4) through the front connecting support (6), the rear guide wheel (7) is connected with the semi-automatic welding trolley (4) through the rear connecting support (8), and the front connecting support (6) of the front guide wheel (5) is longer than the rear connecting support (8) of the rear guide wheel (7).
4. The deformation-preventing welding process for the large-length box-shaped structural member as claimed in claim 1, which is characterized in that: in the step 4), in the two-layer two-pass welding of the open-slope mouth welding seam, the first welding seam is: the current is 260-280A, the voltage is 28-30V, the welding speed is 75min/cm, and a second welding seam: the current is 300-320A, the voltage is 32-35V, and the welding speed is 35 min/cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911174819.9A CN110900020A (en) | 2019-11-26 | 2019-11-26 | Anti-deformation welding process for large-length box-shaped structural member |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911174819.9A CN110900020A (en) | 2019-11-26 | 2019-11-26 | Anti-deformation welding process for large-length box-shaped structural member |
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| CN110900020A true CN110900020A (en) | 2020-03-24 |
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| CN201911174819.9A Pending CN110900020A (en) | 2019-11-26 | 2019-11-26 | Anti-deformation welding process for large-length box-shaped structural member |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309883A (en) * | 2022-01-11 | 2022-04-12 | 上海江南长兴造船有限责任公司 | Method for controlling installation precision of liquid cargo pump folding pipe of liquefied natural gas carrier |
| CN114713946A (en) * | 2022-06-01 | 2022-07-08 | 石家庄阀门一厂股份有限公司 | Welding method for reducing welding deformation of box-type track |
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| CN207127373U (en) * | 2017-07-10 | 2018-03-23 | 中建钢构武汉有限公司 | A kind of welding tractor for being used to weld curved arc box-type member |
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| SU432996A1 (en) * | 1972-12-27 | 1974-06-25 | В. А. Хаванов, В. И. Самарин, А. Г. Григорь , С. Н. Киселев | METHOD FOR THE EDITION OF WELDED STRUCTURES |
| JPS61227005A (en) * | 1985-03-30 | 1986-10-09 | Mitsubishi Metal Corp | Sectional mold |
| CN102773590A (en) * | 2012-07-17 | 2012-11-14 | 山西平阳重工机械有限责任公司 | Small-section square girder and welding process thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114309883A (en) * | 2022-01-11 | 2022-04-12 | 上海江南长兴造船有限责任公司 | Method for controlling installation precision of liquid cargo pump folding pipe of liquefied natural gas carrier |
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| CN114713946A (en) * | 2022-06-01 | 2022-07-08 | 石家庄阀门一厂股份有限公司 | Welding method for reducing welding deformation of box-type track |
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