Stainless steel flat-top framework construction process

Abstract

The invention provides a stainless steel flat-top framework construction technology which comprises the steps that flat-top supporting pipes and flat-top camber beams are positioned, and the flat-top supporting pipes and the flat-top camber beams are assembled in a point fixing mode; the unit longitudinal beam subjected to tack-fixing assembly is subjected to prefabrication reversible deformation pressing, so that the unit longitudinal beam is welded in a reversible deformation state; assembling and connecting the welded longitudinal beam and the end beam of the unit, welding and fixing the longitudinal beam and the end beam of the unit by taking the outer cambered surface of the flat-top framework as a reference surface, and polishing and aligning the root of the flat-top camber beam; and carrying out assembly detection on the flat-top framework after welding and grinding adjustment, so as to check and correct the deviation between the to-be-mounted positions of the flat-top framework and the roof framework. The machining precision of parts can be effectively guaranteed, and the product quality of the stainless steel flat-top framework of the novel structure is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of rail vehicle manufacturing, and in particular relates to a stainless steel flat-top frame construction process. Background Art

[0002] The stainless steel roof structure is generally composed of four sub-components: two side roof frames, two flat roof frames, roof curved beams, and skin. The flat roof frames of ordinary stainless steel models are generally spot-welded, with very little overall deformation. At the same time, they are connected to the side roof frames by overlapping, which has a large tolerance for the flat top ends.

[0003] This kind of ordinary spot-welded flat-top skeleton has little deformation after welding, is not difficult to match with other parts, and is easy to produce. At present, the new flat-top skeleton is very different from the previous ones. Its structure is relatively special. It consists of three parts: a flat-top support tube, a flat-top curved beam, and an end beam. The connection between the parts is made by arc welding, and the deformation is large after welding. The main reason is that the distortion of the flat-top curved beam after welding is very serious, and the adjustment and repair are also very difficult. At the same time, the flat-top skeleton and other parts are also assembled together by welding, and the assembly precision requirements are very high. If the precision is not well controlled during the remanufacturing process, it is easy to cause the parts to be unusable in the end, resulting in the scrapping of the parts. Summary of the invention

[0004] In view of this, the present application aims to propose a stainless steel flat-top frame construction process to solve the problem of high assembly precision and great difficulty in adjustment and repair, which easily causes parts to be scrapped during the manufacturing process of the flat-top frame.

[0005] To achieve the above purpose, the technical solution of this application is implemented as follows:

[0006] The present application provides a stainless steel flat-top skeleton construction process, wherein the flat-top skeleton is composed of a unit longitudinal beam and an end beam, wherein the unit longitudinal beam includes a flat-top support tube and a plurality of flat-top curved beams arranged at intervals on the flat-top support tube, and the construction process includes:

[0007] Positioning the flat-top support tube and the flat-top curved beam, and performing point-fixed assembly of the flat-top support tube and the flat-top curved beam;

[0008] Prefabricate and reverse-deform the longitudinal beams of the unit after point-fixed assembly, so that the longitudinal beams of the unit can be welded in a reverse-deformed state;

[0009] Assemble and connect the welded longitudinal beam of the unit with the end beam, take the outer arc surface of the flat-top frame as the reference plane, weld and fix the longitudinal beam of the unit and the end beam, and grind the root of the flat-top curved beam to make it flush;

[0010] The flat-top frame after welding, grinding and adjustment is subjected to assembly inspection to check and correct the deviation between the flat-top frame and the position to be installed of the roof frame.

[0011] Further, the flat-top support tube and the flat-top curved beam are placed on a longitudinal beam assembly tool of the unit to support and position the flat-top support tube and the flat-top curved beam;

[0012] The unit longitudinal beam assembly tool comprises a first tooling platform, a positioning mechanism and a first supporting member arranged on the first tooling platform, wherein the positioning mechanism is used to position the flat-top support tube, and the first supporting member is used to support the flat-top curved beam;

[0013] The first tooling table is also provided with a clamping member for positioning the flat-top curved beam.

[0014] Furthermore, the longitudinal beam of the unit that has completed the point-fixed assembly is transferred to the anti-deformation welding tooling to pre-deform the longitudinal beam of the unit in the reverse direction;

[0015] The anti-deformation welding tool comprises a second tooling table and a clamping mechanism arranged on the second tooling table, wherein the number of the clamping mechanisms is multiple and they are arranged at intervals on the table surface of the second tooling table;

[0016] Each of the clamping mechanisms includes a fixed base, and a first clamping member and a second clamping member arranged on the fixed base, wherein the first clamping member is used to clamp the top of the flat-top support tube, and the second clamping member is used to clamp one side of the flat-top support tube.

[0017] Furthermore, a first gasket is provided between the bottom end of the flat-top support tube and the upper end surface of the fixed base;

[0018] A second gasket is arranged between a side end of the flat-top support tube away from the second pressing member and a side wall of the fixed base.

[0019] Furthermore, the welded longitudinal beam of the unit is assembled and connected with the end beam by means of a flat-top frame assembly tool;

[0020] The flat-top skeleton assembly tool comprises a third tooling platform, and a second supporting member and a third pressing member arranged on the third tooling platform, wherein the second supporting members are multiple in number and symmetrically arranged on both sides of the third tooling platform, and the upper end surface of the second supporting member matches the outer shape surface of the flat-top curved beam to support the flat-top curved beam;

[0021] There are multiple third clamping members, which are circumferentially distributed on the third tooling table. The third clamping members are used to clamp the flat-top support tube and the end beam.

[0022] Furthermore, a first limiting member for limiting one side of the flat-top support tube is also provided on the table top of the third tooling table;

[0023] A second limiting member for limiting one side of the end beam is also provided on the outer wall of the third tooling platform.

[0024] Furthermore, an end surface of the first limiting member is flush with an end surface of the flat-top curved beam.

[0025] Furthermore, the degree of fit between the end surfaces of the first limit member and the flat-top curved beam is detected by using a straightedge.

[0026] Furthermore, the flat-top frame after welding, grinding and adjustment is turned over and placed into a flat-top frame detection tooling to simulate the detection of the deviation between the flat-top frame and the to-be-installed position of the roof frame;

[0027] The flat-top skeleton detection tooling comprises a fourth tooling platform, on which a fourth pressing member, a fifth pressing member and a detection member are arranged;

[0028] The fourth pressing member is used to press the top of the flat-top support tube and the top of the end beam respectively, and the fifth pressing member is used to press the outer side wall of the end beam;

[0029] The detection components are arranged on both sides of the fourth tooling platform, and the upper end surfaces of the detection components match the end surfaces of the flat-top curved beams.

[0030] Furthermore, a support block for supporting the flat-top support tube is disposed on the upper end surface of the fourth tooling table, and a third limiting member for limiting the side of the flat-top support tube away from the fourth clamping member is mounted on the support block.

[0031] Compared with the prior art, the stainless steel flat-top frame construction process described in this application has the following advantages:

[0032] Beneficial effects:

[0033] The application describes a stainless steel flat-top skeleton construction process, which can effectively control deformation during welding and ensure welding quality. At the same time, it increases the amount of reverse deformation in the processing process, reduces the amount of post-weld adjustment, and improves production efficiency; sets up contoured supporting components for high-precision assembly; sets up final inspection and grinding processes to complete the final correction process, designs a reasonable process plan, improves the product quality of new-structure stainless steel flat-top skeletons, and then masters the high-precision standard stainless steel flat-top skeleton manufacturing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0035] Figure 1 This is a schematic diagram of the flat-top skeleton structure described in an embodiment of the present application;

[0036] Figure 2 This is a flow chart of a stainless steel flat-top skeleton construction process described in an embodiment of the present application;

[0037] Figure 3 This is a schematic diagram of the assembly tooling structure of the unit longitudinal beam according to the embodiment of the present application;

[0038] Figure 4 A top view of the assembly tooling for the longitudinal beam of the unit described in an embodiment of the present application;

[0039] Figure 5 This is a schematic diagram of the shrinkage and deformation direction of the longitudinal beam weld of the unit according to the embodiment of the present application;

[0040] Figure 6 This is a schematic diagram of the anti-deformation welding tooling for the longitudinal beam of the unit described in the embodiment of the present application;

[0041] Figure 7 This is a schematic diagram of the structure of the anti-deformation welding tooling described in an embodiment of the present application;

[0042] Figure 8 A top view of the anti-deformation welding tooling described in an embodiment of the present application;

[0043] Fig. 9 Schematic diagrams of the front and rear of the flat top skin according to the embodiment of the present application;

[0044] Fig.10 This is a schematic diagram of the flat-top frame assembly tooling structure described in an embodiment of the present application;

[0045] Fig.11 A top view of the flat-top frame assembly tooling described in an embodiment of the present application;

[0046] Fig.12 This is a schematic diagram of the flat-top skeleton detection tooling structure described in an embodiment of the present application;

[0047] Fig.13 This is a top view of the flat-top skeleton detection tooling described in an embodiment of the present application.

[0048] Description of reference numerals:

[0049] 1-flat-top support tube; 2-flat-top curved beam; 3-end beam; 4-unit longitudinal beam assembly tooling; 41-first tooling platform; 42-first positioning block; 43-second positioning block; 44-positioning adjustment block; 45-fixing member; 46-first supporting member; 47-pressing member; 5-anti-deformation welding tooling; 51-second tooling platform; 52-fixed base; 53-first pressing member; 54-second pressing member; 55-first gasket; 56-second gasket; 6-flat-top skeleton assembly tooling; 61-third tooling platform; 62-second supporting member; 63-third pressing member; 64-first limit member; 65-second limit member; 7-flat-top skeleton detection tooling; 71-fourth tooling platform; 72-fourth pressing member; 73-fifth pressing member; 74-detection member; 75-support block; 76-third limit member. DETAILED DESCRIPTION

[0050] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0051] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0052] First, analyze the structural characteristics of the flat roof frame: the flat roof frame can be divided into the following parts, such as Figure 2 As shown:

[0053] The flat-top support tube 1 and the flat-top curved beam 2 are pre-assembled and welded together to form the longitudinal beam of the unit (the flat-top support tube 1 + the flat-top curved beam 2), and then assembled together with the end beam 3 to complete the entire assembly process.

[0054] See also Figure 1 As shown, this embodiment provides a stainless steel flat-top frame construction process, the flat-top frame is composed of a unit longitudinal beam and an end beam 3, wherein the unit longitudinal beam includes a flat-top support tube 1 and a plurality of flat-top curved beams 2 arranged at intervals on the flat-top support tube 1, and the construction process specifically includes the following steps:

[0055] Step S101 , positioning the flat-top support tube 1 and the flat-top curved beam 2 , and performing point-fixed assembly of the flat-top support tube 1 and the flat-top curved beam 2 .

[0056] Specifically, in this embodiment, the flat-top curved beam 2 is a three-dimensional curved beam, and it is very difficult to assemble it with the flat-top support tube 1, so the tooling needs to have a contoured surface to hold up all the parts, and then clamp them to the correct position, fix them together through welding points, and complete the assembly without welding.

[0057] In some embodiments, the flat-top support tube 1 and the flat-top curved beam 2 are placed on the unit longitudinal beam assembly tool 4 to support and position the flat-top support tube 1 and the flat-top curved beam 2;

[0058] The unit longitudinal beam assembly tool 4 includes a first tooling platform 41, a positioning mechanism and a first supporting member 46 arranged on the first tooling platform 41, the positioning mechanism is used to position the flat-top support tube 1, and the first supporting member 46 is used to support the flat-top curved beam 2;

[0059] The first tooling platform 41 is also provided with a clamping member 47 for positioning the flat-top curved beam 2 .

[0060] Specifically, in this embodiment, Figure 3 and Figure 4 As shown, the positioning mechanism includes a first positioning block 42, a second positioning block 43, a positioning adjustment block 44 and a fixing member 45; the first positioning blocks 42 are multiple in number and are symmetrically arranged on one side of the flat-top curved beam 2, for positioning the side of the flat-top support tube 1 close to the flat-top curved beam 2; the second positioning block 43 is located at the end of the first tooling table 41, for positioning the two ends of the flat-top support tube 1; the positioning adjustment blocks 44 are multiple in number and are correspondingly installed at the middle position of the two flat-top support tubes 1, for positioning the other side of the flat-top support tube 1;

[0061] There are multiple fixing members 45 , which are arranged at intervals in the middle of two flat-top support tubes 1 . The position of the fixing block provided on the fixing member 45 can be adjusted up and down to realize the positioning of the upper end of the flat-top support tube 1 .

[0062] The first supporting member 46 is located on both sides of the first tooling table 41, and is provided with an arc surface matching the flat-top curved beam 2, which can support the flat-top curved beam 2. A clamping member 47 is fixed on the first tooling table 41 by tightening screws to fix the position of the flat-top curved beam 2 placed on the first supporting member 46.

[0063] During the actual operation, the flat-top support tube 1 is placed on the unit longitudinal beam assembly tooling 4, the positioning adjustment block 44 on the tooling is used to pre-fix the position of the flat-top support tube 1, and then the fixing member 45 is used to press and fix it, and then the flat-top curved beam 2 is placed on the first supporting member 46, and the flat-top curved beam 2 is pressed using the pressing member 47; finally, spot welding is started to connect the flat-top support tube 1 and the flat-top curved beam 2 together to enter the next process.

[0064] Step S102, prefabricate and reverse-deform the longitudinal beams of the unit after point-fixed assembly, so that the longitudinal beams of the unit can be welded in a reverse-deformed state.

[0065] Specifically, in this embodiment, the weld distribution characteristics of the longitudinal beam of the unit are analyzed, which are mainly concentrated on both sides of the flat-top curved beam 2. The welding deformation of the flat-top support tube 1 after welding comes from the welding shrinkage in the two directions A and B. Figure 5 By welding a test piece in a free state, the deformation is measured, mainly Figure 5 The straightness of the A surface and the B surface of the middle flat top support tube 1 is recorded and the pre-deformation in the opposite direction is set to offset the welding deformation.

[0066] Move the unit longitudinal beam that has completed point-fixed assembly to the anti-deformation welding tool 5, and realize pre-deformation in the opposite direction of the unit longitudinal beam by adjusting the gasket. Note: the pre-deformation amount is twice the deformation caused by welding itself, so that welding can be carried out in the anti-deformation state to eliminate the influence of welding deformation caused by welding itself, and ensure that the unit longitudinal beam after welding does not have deformation such as distortion.

[0067] In some embodiments, Figure 6 and Figure 7 As shown, the longitudinal beam of the unit that has completed the point-fixed assembly is transferred to the anti-deformation welding tool 5, and the longitudinal beam of the unit is pre-deformed in the opposite direction;

[0068] The anti-deformation welding tool 5 includes a second tooling table 51 and a clamping mechanism arranged on the second tooling table 51. The number of the clamping mechanisms is multiple and they are arranged at intervals on the table surface of the second tooling table 51.

[0069] Each clamping mechanism includes a fixed base 52, and a first clamping member 53 and a second clamping member 54 arranged on the fixed base 52, the first clamping member 53 is used to clamp the top of the flat-top support tube 1, and the second clamping member 54 is used to clamp one side of the flat-top support tube 1;

[0070] A first gasket 55 is provided between the bottom end of the flat-top support tube 1 and the upper end surface of the fixed base 52;

[0071] A second gasket 56 is provided between a side end of the flat-top support tube 1 away from the second pressing member 54 and a side wall of the fixed base 52 .

[0072] Specifically, in this embodiment, a plurality of fixed bases 52 arranged at intervals are provided on the second workbench 51, and a first clamping member 53 and a second clamping member 54 are installed on the fixed base 52. The first clamping member 53 is used to clamp the top of the flat-top support tube 1, and the second clamping member 54 is used to clamp one side of the flat-top support tube 1. Gaskets are respectively installed between the bottom end of the flat-top support tube 1 and the upper end surface of the fixed base 52 and between one side end of the flat-top support tube 1 away from the second clamping member 54 and the side wall of the fixed base 52.

[0073] In the actual operation process, the deformation of the flat-top support tube 1 is actually measured through the welding test piece, such as Figure 6 As shown in the right part, after welding, the lower side of surface A is deformed by 4mm, and the left side of surface B is deformed by 3mm. Therefore, before the longitudinal beam of the unit is put into the welding fixture, the gaskets on the two directions of the longitudinal beam anti-deformation welding fixture 5 of the unit are pre-adjusted. By adjusting the gaskets, the pre-deformation in the opposite direction is set. The pre-deformation setting value is twice the welding deformation amount, that is, the upper side of surface A is pre-deformed by (4X2)mm, and the right side of surface B is pre-deformed by (3X2)mm. The specific placement is as follows Figure 6 As shown:

[0074] No gaskets are added at D and H, and the pre-deformation is set to 0mm.

[0075] Add 4mm thick gaskets at the green gasket positions at E and J, and add 3mm thick gaskets at the red gasket positions.

[0076] Add a 8mm thick gasket at the green gasket position at F, and add a 6mm thick gasket at the red gasket position.

[0077] After adjusting the gasket, the unit longitudinal beam enters the unit longitudinal beam anti-deformation welding tooling 5, and is pressed on the tooling using the clamps on the upper and right sides. After the prefabricated anti-deformation clamping is completed, welding begins, and the tooling is removed after complete cooling.

[0078] Step S103, assemble and connect the welded longitudinal beam of the unit with the end beam 3, use the outer arc surface of the flat-top frame as the reference plane, weld and fix the longitudinal beam of the unit and the end beam 3, and grind the root of the flat-top curved beam 2 to make it flush.

[0079] Specifically, in this embodiment, the welded longitudinal beams and end beams 3 of the unit are assembled together. Because the outside of the flat-top frame is to be covered with a stainless steel outer skin, the accuracy of the outer contour is required to be very high. Fig. 9 As shown, the flat-top frame has very high requirements for shape accuracy, and its assembly process needs to give priority to ensuring shape accuracy, so the support surface of the flat-top frame assembly needs to be the outer contour as the support surface.

[0080] The tooling uses the outer arc surface of the flat-top frame as the reference plane, and positions all parts to the correct position for welding to complete the connection of each part. After welding, check the straightness of the root of the flat-top curved beam 2, relying on the root locator of the flat-top curved beam 2 on the tooling (i.e., the limiter), and use a 3-meter-long ruler to stick it on the limiter.

[0081] By detecting the fit between the root of the flat-top curved beam 2, the flat ruler and the limiter, and then grinding the root of the flat-top curved beam 2, the flatness of the root of the flat-top curved beam 2 is ensured, thereby ensuring the accuracy of the contact surface.

[0082] In some embodiments, Fig.10 and Fig.11 As shown, the welded longitudinal beam of the unit is assembled and connected with the end beam 3 by means of a flat-top frame assembly tool 6;

[0083] The flat-top frame assembly tool 6 includes a third tooling platform 61, and a second supporting member 62 and a third pressing member 63 arranged on the third tooling platform 61. The second supporting members 62 are multiple in number and symmetrically arranged on both sides of the third tooling platform 61. The upper end surface of the second supporting member 62 matches the outer shape surface of the flat-top curved beam 2 to support the flat-top curved beam 2.

[0084] There are multiple third clamping members 63, which are circumferentially distributed on the third tooling platform 61. The third clamping members 63 are used to clamp the flat-top support tube 1 and the end beam 3.

[0085] A first stopper 64 is also provided on the surface of the third tooling table 61 to stop one side of the flat-top support tube;

[0086] A second limiting member 65 for limiting one side of the end beam 3 is also provided on the outer wall of the third tooling platform 61;

[0087] The end surface of the first limiting member 64 is flush with the end surface of the flat-top curved beam 2 .

[0088] Specifically, in this embodiment, a plurality of second supporting members 62 are arranged on both sides of the third tooling platform 61 (the third tooling platform 61 is a square structure with a hollow interior), and the upper end surfaces of the second supporting members 62 match the outer shape surfaces of the flat-top curved beam 2. The main purpose is to provide supporting force for the flat-top curved beam 2. In addition, by means of the first limiting member 64, the fit between the root of the flat-top curved beam 2 and the straight ruler and the limiting member is detected to ensure the flatness of the root of the flat-top curved beam 2.

[0089] In addition, it should be noted that the third clamping member 63 is a clamping device that can provide lateral side clamping force and top clamping force at the same time, and can fix the position of the flat-top support tube 1 and the end beam 3 from two directions.

[0090] In actual operation, the end beam 3 is placed and installed on the flat-top frame assembly tooling 6, with the two sides aligned and attached to the first stoppers 64, and the front and rear directions are tightly attached to the second stoppers 65, and after completion, it is pressed and fixed using a clamp. The unit longitudinal beam is installed on the tooling, first, the flat-top support tube 1 of the unit longitudinal beam is tightly attached to the first stoppers 64 on both sides, and then it is pressed and fixed using a clamp.

[0091] After the fixation is completed, welding is started, and then waiting for cooling is performed. After complete cooling, a straight ruler is used to check the straightness of the two surfaces of all the flat-top curved beams 2 on each side of the curved beam, and the roots of the flat-top curved beams 2 are grinded to ensure that the roots of the flat-top curved beams 2 are flush. After grinding is completed, the flat-top frame is removed from the tooling.

[0092] Step S104 , performing assembly inspection on the flat-top frame after welding, grinding and adjustment, so as to check and correct the deviation between the installation position of the flat-top frame and the roof frame.

[0093] Specifically, in this embodiment, after the welding and grinding adjustment of the flatness frame is completed, the last process is to be carried out, that is, the inspection before installation, to check and correct the slight deviation of the installation position of the flat top frame and the roof frame. The connection position of the flat top frame and the roof frame is the interface position. In order to simulate the installation state of this interface, including pressing, etc., the interface inspection in the free state before the installation of the flat top frame is carried out. Check the assembly state, mark the grinding position for the places that do not meet the requirements, and finally complete the fine correction of the parts.

[0094] In some embodiments, the flat-top frame after welding, grinding and adjustment is turned over and placed into the flat-top frame detection tool 7 to simulate the deviation between the flat-top frame and the position to be installed of the roof frame;

[0095] like Fig.12 and Fig.13 As shown, the flat-top skeleton detection tool 7 includes a fourth tooling platform 71, on which a fourth pressing member 72, a fifth pressing member 73 and a detection member 74 are arranged;

[0096] The fourth pressing member 72 is used to press the top of the flat-top support tube 1 and the top of the end beam 3 respectively, and the fifth pressing member 73 is used to press the outer side wall of the end beam 3;

[0097] The detection components 74 are arranged on both sides of the fourth tooling platform 71, and the upper end surface of the detection components 74 matches the end surface of the flat-top curved beam 2;

[0098] A support block 75 for supporting the flat-top support tube 1 is disposed on the upper end surface of the fourth tooling platform 71 , and a third limiting member 76 for limiting the side of the flat-top support tube 1 away from the fourth clamping member 72 is mounted on the support block 75 .

[0099] Specifically, in this embodiment, a fourth pressing member 72, a fifth pressing member 73, a detection member 74 and a third stopper 76 are arranged on the fourth tooling platform 71. Fig.12 As shown, a plurality of fourth clamping members 72 are mainly used to clamp the top of the flat-top support tube 1 and the top of the end beam 3, and a plurality of fifth clamping members 73 are used to clamp the outer wall of the end beam 3. At the same time, a third limiting member 76 is used to limit the other side of the flat-top support tube 1. The various workpieces cooperate to achieve the positioning of the flat-top skeleton body.

[0100] In order to better simulate the interface position between the flat-top frame and the roof frame without deviation, a detection component 74 is designed in this embodiment and is respectively arranged on both sides of the fourth workbench 71. By means of the profiling blocks arranged on the detection component 74, it can fit with the two end surfaces of the flat-top curved beam 2.

[0101] In the actual operation, the flat-top frame is turned over and placed in the flat-top frame detection tooling 7, and the flat-top curved beams 2 on both sides are placed on the detection member 74, and the flat-top frame is compressed by the compression device. After compression, the matching state of the flat-top curved beams 2 of the flat-top frame and the detection member 74 is checked, and the positions where interference occurs are marked and polished, and finally the fine correction of the parts is completed to complete the construction of the flat-top frame.

[0102] The construction process described in this embodiment can effectively control the deformation during welding and ensure the welding quality. At the same time, it increases the amount of reverse deformation in the processing process, reduces the amount of post-welding adjustment, and improves production efficiency; sets a contoured supporting component for high-precision assembly; sets a final inspection and grinding process to complete the final correction process, designs a reasonable process plan, improves the product quality of the new structure stainless steel flat-top skeleton, and then masters the high-precision standard stainless steel flat-top skeleton manufacturing technology. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, not to limit it; although the present invention is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention, and they should all be included in the scope of the claims and specifications of the present invention.

[0103] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A construction process for a stainless steel flat-top frame, wherein the flat-top frame is composed of a longitudinal beam and an end beam of the unit, wherein: The longitudinal beam of the unit includes a flat-top support tube and a plurality of flat-top curved beams arranged at intervals on the flat-top support tube, and is characterized in that the construction process includes: Positioning the flat-top support tube and the flat-top curved beam, and performing point-fixed assembly of the flat-top support tube and the flat-top curved beam; Prefabricate and reverse-deform the longitudinal beams of the unit after point-fixed assembly, so that the longitudinal beams of the unit can be welded in a reverse-deformed state; Assemble and connect the welded longitudinal beam of the unit with the end beam, take the outer arc surface of the flat-top frame as the reference plane, weld and fix the longitudinal beam of the unit and the end beam, and grind the root of the flat-top curved beam to make it flush; The flat-top frame after welding, grinding and adjustment is subjected to assembly inspection to check and correct the deviation between the flat-top frame and the position to be installed of the roof frame.

2. A stainless steel flat-top skeleton construction process according to claim 1, characterized in that: Placing the flat-top support tube and the flat-top curved beam on the unit longitudinal beam assembly tooling to support and position the flat-top support tube and the flat-top curved beam; The unit longitudinal beam assembly tool comprises a first tooling platform, a positioning mechanism and a first supporting member arranged on the first tooling platform, wherein the positioning mechanism is used to position the flat-top support tube, and the first supporting member is used to support the flat-top curved beam; The first tooling table is also provided with a clamping member for positioning the flat-top curved beam.

3. A stainless steel flat-top skeleton construction process according to claim 1, characterized in that: The longitudinal beam of the unit after point-fixed assembly is transferred to the anti-deformation welding tool, and the longitudinal beam of the unit is pre-deformed in the reverse direction; The anti-deformation welding tool comprises a second tooling table and a clamping mechanism arranged on the second tooling table, wherein the number of the clamping mechanisms is multiple and they are arranged at intervals on the table surface of the second tooling table; Each of the clamping mechanisms includes a fixed base, and a first clamping member and a second clamping member arranged on the fixed base, wherein the first clamping member is used to clamp the top of the flat-top support tube, and the second clamping member is used to clamp one side of the flat-top support tube.

4. A stainless steel flat-top skeleton construction process according to claim 3, characterized in that: A first gasket is provided between the bottom end of the flat-top support tube and the upper end surface of the fixed base; A second gasket is arranged between a side end of the flat-top support tube away from the second pressing member and a side wall of the fixed base.

5. A stainless steel flat-top skeleton construction process according to claim 1, characterized in that: Assembling and connecting the welded longitudinal beam of the unit with the end beam through a flat-top frame assembly tool; The flat-top skeleton assembly tool comprises a third tooling platform, and a second supporting member and a third pressing member arranged on the third tooling platform, wherein the second supporting members are multiple in number and symmetrically arranged on both sides of the third tooling platform, and the upper end surface of the second supporting member matches the outer shape surface of the flat-top curved beam to support the flat-top curved beam; There are multiple third clamping members, which are circumferentially distributed on the third tooling table. The third clamping members are used to clamp the flat-top support tube and the end beam.

6. A stainless steel flat-top skeleton construction process according to claim 5, characterized in that: The table top of the third tooling table is also provided with a first limiting member for limiting one side of the flat-top support tube; A second limiting member for limiting one side of the end beam is also provided on the outer wall of the third tooling platform.

7. A stainless steel flat-top skeleton construction process according to claim 6, characterized in that: The end surface of the first limiting member is flush with the end surface of the flat-top curved beam.

8. A stainless steel flat-top skeleton construction process according to claim 7, characterized in that: The degree of fit between the end surfaces of the first limit member and the flat-top curved beam is detected by a straightedge.

9. A stainless steel flat-top skeleton construction process according to claim 1, characterized in that: Turning over the flat-top frame after welding, grinding and adjustment and placing it into a flat-top frame detection tooling to simulate and detect the deviation between the flat-top frame and the position to be installed of the roof frame; The flat-top skeleton detection tooling comprises a fourth tooling platform, on which a fourth pressing member, a fifth pressing member and a detection member are arranged; The fourth pressing member is used to press the top of the flat-top support tube and the top of the end beam respectively, and the fifth pressing member is used to press the outer side wall of the end beam; The detection components are arranged on both sides of the fourth tooling platform, and the upper end surfaces of the detection components match the end surfaces of the flat-top curved beams.

10. A stainless steel flat-top skeleton construction process according to claim 9, characterized in that: A support block for supporting the flat-top support tube is disposed on the upper end surface of the fourth tooling table, and a third limiting member for limiting the side of the flat-top support tube away from the fourth clamping member is mounted on the support block.

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