CN112059457B - Welding method and manufacturing process of press body - Google Patents
Welding method and manufacturing process of press body Download PDFInfo
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- CN112059457B CN112059457B CN202010929137.0A CN202010929137A CN112059457B CN 112059457 B CN112059457 B CN 112059457B CN 202010929137 A CN202010929137 A CN 202010929137A CN 112059457 B CN112059457 B CN 112059457B
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- plate
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- longitudinal side
- supporting
- press body
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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
- 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
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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
- 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
- B23K31/003—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 controlling of welding distortion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/04—Frames; Guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides a welding method and a manufacturing process of a press body, belonging to the field of large-scale bearing chassis, and the method comprises the following steps: the method comprises the following steps: two longitudinal side plates in a press machine body, and a middle supporting plate and a bottom plate supporting plate which are arranged in the longitudinal side plates are assembled in advance; the middle supporting plate comprises a first middle plate, a second middle plate and a third middle plate which are parallel to each other; the bottom plate support plate comprises a first bottom support plate and a second bottom support plate; step two: vertically placing the two longitudinal side plates, respectively welding a first middle plate and a first bottom supporting plate along the same side in the width direction, then turning the two longitudinal side plates for 90 degrees, sequentially welding a second middle plate and a third middle plate above the first middle plate, and welding a second bottom supporting plate above the first bottom supporting plate; step three: and welding a base support plate to the bottoms of the two longitudinal side plates. The welding method effectively controls the welding deformation and improves the production efficiency.
Description
Technical Field
The disclosure belongs to the field of large-scale load-bearing chassis, and particularly relates to a welding method and a manufacturing process of a press body.
Background
The press body is an important part of the press, and determines whether the operation of the press is stable or not and the performance of the press, so that the welding performance of the press body plays an important role. The existing process of welding the press body is complex, parts of the press body are gradually welded one by one according to the assembly positions, the welding mode is complex, and the deformation of the press body after welding is large.
Disclosure of Invention
The welding method is a welding method which adopts sectional assembly and then folding of the press body, thereby ensuring the welding quality, reducing the welding deformation and improving the welding efficiency.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
at least one embodiment of the present disclosure provides a method of welding a press body, the method including the steps of:
the method comprises the following steps: two longitudinal side plates in a press machine body, and a middle supporting plate and a bottom plate supporting plate which are arranged in the longitudinal side plates are assembled in advance; the middle supporting plate comprises a first middle plate, a second middle plate and a third middle plate which are parallel to each other; the bottom plate support plate comprises a first bottom support plate and a second bottom support plate;
step two: vertically placing the two longitudinal side plates, respectively welding a first middle plate and a first bottom supporting plate along the same side in the width direction, then turning the two longitudinal side plates for 90 degrees, sequentially welding a second middle plate and a third middle plate above the first middle plate, and welding a second bottom supporting plate above the first bottom supporting plate;
step three: and welding a base support plate to the bottoms of the two longitudinal side plates.
Furthermore, in the second step, the first to third middle plates, the first to second bottom support plates and the two longitudinal side plates are welded in a symmetrical mode at flat welding positions in a multi-layer and multi-pass welding mode.
Furthermore, when welding is performed in the second step, tack welding is performed first, and then the welding seam is filled and welded.
Furthermore, when the first to third middle plates and the first to second bottom supporting plates are welded, half of all weld filling grooves at the flat welding positions are completed, then the press body is turned over by 180 degrees, and the other half of the weld filling grooves at the flat welding positions are completed.
Furthermore, the welding is carried out in a carbon dioxide gas shielded welding mode.
Further, in the third step, the press body is welded with the bottom support plate in a standing state.
Further, in the first step, the first to third middle plates, the first to second bottom support plates, and the two longitudinal side plates are welded in advance.
At least one embodiment of the present disclosure also provides an assembling process of a press body, including the following processes:
(1) Blanking according to the size of each part of the press body;
(2) Welding and assembling the press body according to the welding method;
(3) Performing flame shape adjustment on the position with local flatness difference or deformation exceeding a preset size in the press body;
(4) Stress relief is carried out on the welding position; and finally, sand blasting and paint spraying.
Furthermore, the whole length of the parts of the press body is increased by 10mm, the width is increased by 6mm, and the height is increased by 4mm, and the flatness of the parts exceeds 3mm and is corrected by flame.
Furthermore, when the shape of the pressure machine body is adjusted after welding, if a part of the pressure machine body is convexly deformed, a heavy object can be added for adjusting the shape.
The beneficial effects of this disclosure are as follows:
(1) The welding method of the press body is characterized in that parts in the press body are segmented, and then the segmented parts are welded in a folding mode, and compared with the traditional method that a single part is gradually welded, welding errors are reduced.
(2) The first backup pad in the middle of welding and the first backup pad in bottom between two vertical curb plates on the fuselage of this disclosed press fuselage earlier, then progressively weld some other backup pads in the direction of height, reduced the number of times of upset, improved work efficiency, after welding vertical curb plate and backup pad contact position one side, with the rotatory 180 degrees of fuselage, the opposite side of rewelding has reduced the deformation of fuselage simultaneously.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 is an isometric view of a press body structure provided by an embodiment of the present disclosure after welding;
FIG. 2 is a top view of a welded press body structure provided by an embodiment of the present disclosure;
fig. 3 is a structural diagram of another angle of a press body structure obtained after welding according to an embodiment of the disclosure.
In the figure: 1. first vertical curb plate, 2, the vertical curb plate of second, 3, the first backup pad in centre, 4, the second backup pad in centre, 5, the third backup pad in centre, 6, the first backup pad in bottom, 7, the second backup pad in bottom, 8, first connecting plate, 81, round steel, 9, the second connecting plate, 91, baffle, 10, bed plate, 11, first fixed plate, 12, second fixed plate, 13, the third connecting plate.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this disclosure, if any, merely indicate that the directions of movement are consistent with those of the figures themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present disclosure.
As shown in fig. 1, a schematic structural diagram of a press body obtained after welding assembly according to an embodiment of the present disclosure;
the specific welding method referred to this figure is as follows:
A. the first longitudinal side plate 1 and the second longitudinal side plate 2 are assembled to form a section A and a section B, wherein the first fixing plate 11 and the second fixing plate 12 are welded on the inner side of the first longitudinal side plate 1, the assembly 21 is welded on the outer side of the second longitudinal side plate 2, and the assembly 21 is also welded on the outer side of the first longitudinal side plate.
B. Assembling the middle bearing support plates between the two longitudinal side plates, wherein as shown in the figure, three middle bearing support plates are arranged between the two longitudinal side plates and are divided into a middle first support plate 3, a middle second support plate 4 and a middle third support plate 5, wherein a round steel is arranged in the middle of the middle support plate (namely the middle second support plate 4), and the middle second support plate is independently welded to form a C section;
C. the first support plate 6 at the bottom of the assembly forms a D-section part: the D-section component comprises a first supporting transverse plate, the first supporting transverse plate is positioned between the two longitudinal side plates, the first supporting longitudinal plate is vertically connected with the first supporting transverse plate, four rib plates (not shown in the figure) are arranged between the first supporting longitudinal plate and the first supporting transverse plate, and the first supporting plate at the bottom is independently welded;
D. assembling the bottom second support plate 7 forms a section E part: the E section part and the D section part have similar structures and are welded in advance;
E. assembling the first connecting plate 8 forms the segment F: as shown in fig. 2, the first connecting plate 8 is disposed between the middle first supporting plate and the middle second supporting plate, the first connecting plate 8 is formed by round bars 81, and the first connecting plate 8 and the round bars 81 are welded together.
F. Assembling the second connecting plate 9 to form the segment G: the second connecting plate 9 is arranged between the middle second supporting plate and the middle third supporting plate, the second connecting plate 9 is a horizontal supporting plate arranged at the opening of the press, a through hole is arranged in the middle of the horizontal supporting plate, and the upper baffle 91 is welded around the through hole.
The large parts of the press body are welded separately, i.e. before the press body is welded.
The body of the press machine is closed and welded in sections according to the following process;
step (1): vertically placing the A and B sections, and assembling a middle first supporting plate 3 and a bottom first supporting plate 6 by taking a central line between the A and B sections as a reference, wherein positioning welding is performed between the two supporting plates and a longitudinal side plate, and welding is not performed;
step (2): continuously welding two first transverse plates on the upper part of the middle first supporting plate by taking the central lines of the segments A and B as a reference, then welding first inclined plates on the end parts of the two transverse plates, and finally welding an upper segment F between the two inclined plates and between the transverse plates; after the segment F is installed, welding the segment C, finally welding a second transverse plate and a second inclined plate on the top of the segment C, welding the segment G between the two second inclined plates, finally welding an intermediate third support plate on the upper part of the segment G, and welding a bottom second support plate, namely an E-segment component, wherein positioning welding is performed and welding is not performed in the welding process;
it should be noted that, in the step (2), the segmentation and the parts are half of the filling grooves of the welding seams at all the flat welding positions, after the welding, the machine body is turned over by 180 degrees, the remaining half of the filling grooves of the welding seams at all the flat welding positions are completed, and the long welding seam adopts a segmentation back welding method.
It should be further noted that: in the steps, filling welding is carried out after the positioning welding is finished, the filling welding adopts a carbon dioxide gas shielded welding mode, the filling metal grade is AWS 5.18ER70S-6, the specification is phi 1.2mm, and the shielding gas is 100% carbon dioxide.
a. The independent welding of the side plates, the middle supporting plate, the bottom supporting plate and the sections A, B, C, D, E and F uses a flat welding position, and multilayer multi-pass welding is carried out in a symmetrical welding mode.
(3) And finally, taking the central lines of the sections A and B as the reference, assembling the base plate 10 and the third connecting plate 13, welding the base plate and the third connecting plate in a positioning way, and finally filling and welding the base plate and the third connecting plate.
It should be noted that in this step three, the base plate 10 and the third connecting plate 13 are both welded while the machine body is standing.
(4) And shape adjustment: and (3) performing flame shape adjustment on the position with the over-poor local flatness or large deformation, heating the workpiece to 500-650 ℃ (the appearance is tawny), and adding a heavy object at the convex part if the deformation is too large.
(5) And stress relief treatment: and (5) stress relief treatment.
(6) And surface treatment: and performing sand blasting treatment according to the product to ISO Sa 2/2, and painting to form a finished product.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (5)
1. The welding method of the press body is characterized by comprising the following steps of:
the method comprises the following steps: firstly, welding each part independently:
(A) Assembling a first longitudinal side plate and a second longitudinal side plate to form A and B sections, wherein a first fixing plate and a second fixing plate are welded on the inner side of the first longitudinal side plate, an assembly is welded on the outer side of the second longitudinal side plate, and an assembly is also welded on the outer side of the first longitudinal side plate;
(B) Assembling an intermediate bearing support plate located between the first longitudinal side plate and the second longitudinal side plate: three middle bearing support plates are arranged between the first longitudinal side plate and the second longitudinal side plate and are divided into a middle first support plate, a middle second support plate and a middle third support plate, wherein a round steel is arranged in the middle of the middle second support plate, and the middle second support plate is independently welded to form a section C;
(C) The first backup pad in assembly bottom forms D section part: the D-section part comprises a first supporting transverse plate, the first supporting transverse plate is positioned between the first longitudinal side plate and the second longitudinal side plate, a first supporting longitudinal plate is vertically connected with the first supporting transverse plate, four rib plates are arranged between the first supporting longitudinal plate and the first supporting transverse plate, and the first supporting plate at the bottom is independently welded;
(D) Assembling the bottom second support plate to form the E-section component: the E section part and the D section part have similar structures and are welded in advance;
(E) Assembling the first connection plate forming the segment F: the first connecting plate is arranged between the middle first supporting plate and the middle second supporting plate, round steel is arranged on the first connecting plate, and the first connecting plate and the round steel are welded together;
(F) Assembling the second connecting plate to form a section G: the second connecting plate is arranged between the middle second supporting plate and the middle third supporting plate, the second connecting plate is a horizontal supporting plate arranged at a press port, a through hole is formed in the middle of the horizontal supporting plate, and a baffle is welded around the through hole;
step two: and (3) folding and welding the parts:
(1) Vertically placing the A and B sections, and assembling a middle first support plate and a bottom first support plate by taking a central line between the A and B sections as a reference, wherein positioning welding is performed between the middle first support plate, the bottom first support plate, a first longitudinal side plate and a second longitudinal side plate;
(2) Continuously taking the central lines of the segments A and B as a reference, welding two first transverse plates on the upper part of the middle first supporting plate, then welding first inclined plates at the end parts of the two first transverse plates, and finally welding a segment F between the two inclined plates and between the first transverse plates; after the segment F is installed, welding the segment C, welding a second transverse plate and a second inclined plate on the top of the segment C, welding the segment G between the two second inclined plates, welding a middle third support plate on the upper part of the segment G, welding an E-segment component, and striking positioning welding in the welding process;
(3) Assembling a base plate and a third connecting plate by taking the central lines of the sections A and B as a reference, well performing tack welding, and finally performing filling welding;
filling welding is carried out after tack welding is carried out in the steps (1) and (2), the filling welding adopts a carbon dioxide gas shielded welding mode, the filling metal is AWS 5.18ER70S-6, the specification is phi 1.2mm, and the shielding gas is 100% of carbon dioxide; in the step (2), half of the weld filling grooves at all the flat welding positions are completed, then the body of the press is laterally turned by 180 degrees, and the other half of the weld filling grooves at all the flat welding positions are completed.
2. A method of welding a press body as defined in claim 1, wherein: in the step (3), the press body is welded with the base plate and the third connecting plate in a standing state.
3. The assembly process of the press body is characterized by comprising the following steps:
(1) Blanking according to the sizes of all parts of the press body;
(2) Welding and assembling the body of the press according to the welding method of claim 1 or 2;
(3) Performing flame shape adjustment on the position of the press body with local flatness difference or deformation exceeding a preset size;
(4) Stress relief is carried out on the welding position; and finally, sand blasting and paint spraying.
4. A process for assembling a press body according to claim 3, wherein blanking is performed according to the size of each part of the press body, which part is corrected with flame for flatness exceeding 3 mm.
5. The assembling process of a press body according to claim 3, wherein in the case of performing the shape adjustment after welding the press body, if a part of the press body is deformed convexly, a weight is added to perform the shape adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010929137.0A CN112059457B (en) | 2020-09-07 | 2020-09-07 | Welding method and manufacturing process of press body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010929137.0A CN112059457B (en) | 2020-09-07 | 2020-09-07 | Welding method and manufacturing process of press body |
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| Publication Number | Publication Date |
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| CN112059457A CN112059457A (en) | 2020-12-11 |
| CN112059457B true CN112059457B (en) | 2022-12-27 |
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| CN202010929137.0A Active CN112059457B (en) | 2020-09-07 | 2020-09-07 | Welding method and manufacturing process of press body |
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| CN113319461B (en) * | 2021-06-25 | 2022-06-07 | 中国船舶重工集团柴油机有限公司 | Method for welding oil supply unit shell of large marine dual-fuel diesel engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200995494Y (en) * | 2006-12-28 | 2007-12-26 | 扬州捷迈锻压机械有限公司 | Welding press body of integrated cased built-in |
| CN201524760U (en) * | 2009-09-17 | 2010-07-14 | 江苏省徐州锻压机床厂集团有限公司 | Whole frame closed type pressure machine body |
| FI125471B (en) * | 2009-12-11 | 2015-10-15 | Aliko Oy Ltd | A method of forming a press press body and a press press |
| CN103381669A (en) * | 2013-07-01 | 2013-11-06 | 浙江博雷重型机床制造有限公司 | Welding body of pressing machine |
| CN103722338B (en) * | 2014-01-23 | 2015-08-12 | 江苏扬力集团有限公司 | A kind of press frame spot-welding equipment and adopt the spot welding method of this frock |
| CN110091092B (en) * | 2019-06-17 | 2020-12-22 | 中国船舶重工集团柴油机有限公司 | Assembly welding method for upper cross beam of press |
| CN110560941B (en) * | 2019-08-05 | 2021-02-09 | 沃得精机(中国)有限公司 | Assembling and welding process for open press body |
| CN110369898B (en) * | 2019-08-12 | 2021-01-22 | 中国船舶重工集团柴油机有限公司 | Base welding method and manufacturing process |
| CN111468853A (en) * | 2020-04-24 | 2020-07-31 | 青岛海尔洗碗机有限公司 | Dish washing machine inner container and welding method thereof |
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Address after: 266520 No. 501 Lijiang East Road, Huangdao District, Qingdao, Shandong Patentee after: China Shipbuilding Industry Corporation Diesel ENGINE Co.,Ltd. Address before: 266520 No. 501 Lijiang East Road, Huangdao District, Qingdao, Shandong Patentee before: CHINA SHIPBUILDING INDUSTRY CORPORATION DIESEL ENGINE Co.,Ltd. |
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