A method of assembling a rapid prototyping press frame and the press frame obtained thereby

Abstract

The application discloses a kind of assembly method of rapid prototyping press frame and the press frame obtained, first side plate assembly, second side plate assembly are respectively welded separately; 将 After the upper cross beam and the bottom workbench are respectively assembled, they are folded into a cross beam workbench assembly, two people simultaneously weld, and are turned over 4 times during the welding process.After the welding is completed, the cross beam workbench assembly is divided into two separate upper cross beam assemblies and bottom workbench assemblies;The first side plate assembly is vertically fixed on the assembly platform, and the height of the upper cross beam assembly and the bottom workbench assembly is positioned by the equal height block, and the upper cross beam assembly and the bottom workbench assembly are moved to the set position from the left and right sides of the first side plate assembly and welded;The second side plate assembly is moved to the set position for positioning and welding;The obtained press frame is turned over as a whole, and the weld joints are welded using the flat welding and symmetrical welding method.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of press machine frame, and particularly relates to a method for assembling a rapid forming press machine frame. BACKGROUND

[0002] Frame press is a device suitable for the stamping forming of metal plate parts, and is widely used in the fields of automobile parts, rail transit, shipbuilding, aviation, aerospace and the like. The product is required to have sufficient strength, rigidity and wear resistance, strong fatigue resistance and high compressive strength. Therefore, welding is a crucial process in the manufacturing process of the press machine, and the welding performance directly determines the precision and service life of the product. The existing assembly sequence of the rapid forming press machine frame is to assemble the parts from the bottom in sequence, and then to integrally weld, which has low production efficiency and large welding deformation. Frequent small space and high-altitude operation makes the workers' physical health and safe operation have greater risk hidden dangers.

[0003] In the patent CN202010929137.0, a welding method of a press machine body is disclosed. The patent segments the parts in the press machine body, and then welds and assembles the segmented parts. Compared with the traditional gradual welding of single parts, the welding error is reduced. However, in the patent, only the segmented parts in the press machine body are welded and assembled, which cannot effectively reduce the welding deformation and the welding turnover times. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a method for assembling a rapid forming press machine frame.

[0005] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0006] In the first aspect, the embodiments of the present application provide a method for assembling a rapid forming press machine frame, comprising the following steps:

[0007] Step 1: The press machine frame is divided into a first side plate assembly, a second side plate assembly, an upper cross beam assembly and a bottom workbench assembly, and each is independently assembled;

[0008] Step 2: The first side plate assembly and the second side plate assembly are separately welded;

[0009] Step 3: The upper cross beam assembly and the bottom workbench assembly are folded, the gap between the upper cross beam assembly and the bottom workbench assembly is filled with a supporting pad to ensure that there is no gap between them, and the upper cross beam assembly and the bottom workbench assembly are fixed by a fixing plate to form a whole;

[0010] Step 4 simultaneously welds the upper crossbeam assembly and the bottom workbench assembly, removes the fixing plate after welding, and divides the welded upper crossbeam assembly and bottom workbench assembly into two independent assemblies;

[0011] Step 5 draws a line on the assembling platform, and then vertically fixes the first side plate assembly in step 2 on the assembling platform;

[0012] Step 6 takes the first side plate assembly as a zero reference, positions the height of the upper crossbeam assembly and the bottom workbench assembly obtained in step 4 through the equal-height block, moves the upper crossbeam assembly and the bottom workbench assembly obtained in step 4 from the left and right sides of the first side plate assembly to the set positions, and positionally welds the upper crossbeam assembly and the bottom workbench assembly with the first side plate assembly;

[0013] Step 7 moves the second side plate assembly in step 2 from the front side of the first side plate assembly to the set position, and positionally welds the second side plate assembly with the upper crossbeam assembly and the bottom workbench assembly;

[0014] Step 8 flips the press frame obtained in step 7 by 90°, and uses the flat welding and symmetrical welding mode to perform multi-layer and multi-pass welding on the weld seams of the connection parts of the first side plate assembly, the second side plate assembly, the upper crossbeam assembly and the bottom workbench assembly.

[0015] In the second aspect, the embodiment of the present application further provides a press frame obtained by the above-mentioned rapid forming press frame assembling method.

[0016] The beneficial effects of the above-mentioned embodiment of the present application are as follows:

[0017] The present application is in the assembly method of frame press, first divided into several independent assembly parts, and then for the upper beam assembly part, the bottom workbench assembly part adopts the method of combined welding, that is, the upper beam and the bottom workbench are assembled respectively and then folded into a beam workbench assembly part, through the support pad in the middle of the upper beam assembly part and the bottom workbench assembly part, there is no contact gap between the bottom plates of the upper beam assembly part and the bottom workbench assembly part, and the upper beam assembly part and the bottom workbench assembly part become a whole through the welding of the fixed plate; then two people symmetrically weld the flat weld at the same time, and the upper beam and the bottom workbench are turned over 4 times during the welding process, so that the upper beam and the bottom workbench can be rigidly fixed and the stress deformation can be offset each other, so that the welding deformation is more easily controlled. After the welding is completed, the upper beam assembly part and the bottom workbench assembly part are separated. Finally, the whole assembly welding is carried out, so that the welding deformation is controlled to the maximum extent in the sectional welding, the welding operation amount of the final overall assembly is minimized, and the welding deformation is also controlled to the optimal state; the product quality is guaranteed, the production efficiency is improved, the safety hidden danger existing in the production is effectively reduced, and the working environment of workers is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application given below, make an explanation of the application, and do not constitute an improper limitation of the application.

[0019] Figure 1 is a three-dimensional structure schematic diagram of the frame structure of the press proposed by the present application;

[0020] Figure 2 , Figure 3 , Figure 4 , Figure 5 is a two-dimensional structure schematic diagram of the frame structure of the press of the present application;

[0021] Figure 6 is a schematic diagram of the assembly state of the frame structure of the press proposed by the present application;

[0022] Figure 7 is a schematic diagram of the assembly state of the frame structure of the press proposed by the present application;

[0023] Figure 8 is a stress relief annealing curve schematic diagram of the present application;

[0024] Figure 9 is a schematic diagram of the support pad setting in the section C in the present application;

[0025] Figure 10 is a schematic diagram of the combined assembly of the section C and the section D in the present application;

[0026] Figure 11is the first time the combination of segment C and segment D in the present invention, the first time the turning over schematic diagram;

[0027] Figure 12 is the second time the combination of segment C and segment D in the present invention, the second time the turning over schematic diagram;

[0028] Figure 13 is the third time the combination of segment C and segment D in the present invention, the third time the turning over schematic diagram;

[0029] Figure 14 is the fourth time the combination of segment C and segment D in the present invention, the fourth time the turning over schematic diagram;

[0030] In the figure: 1 side plate, 2 bottom plate, 3 side plate, 31 side plate, 32 side plate, 33 side plate, 4 horizontal plate, 5 side plate, 6 side plate, 7 horizontal plate, 8 side plate, 9 side plate, 10 side plate. DETAILED DESCRIPTION

[0031] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as those commonly understood by one of ordinary skill in the art to which this application belongs.

[0032] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless otherwise explicitly stated in the present application, the singular form is also intended to include the plural form, and in addition, it should be understood that when the terms "comprise" and / or "include" are used in the present specification, they indicate the presence of a feature, step, operation, device, component and / or combination thereof;

[0033] For the convenience of description, if "up", "down", "left", "right" appear in the present application, it only means the same direction as the up, down, left and right of the drawing itself, and does not limit the structure, only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the present application.

[0034] As introduced in the background, there are deficiencies in the prior art, in order to solve the above technical problems, the present application provides a 500T rapid forming press frame and welding process.

[0035] In a typical embodiment of the present application, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the press frame to be assembled in this embodiment mainly includes side plate 1, bottom plate 2, side plate 3, side plate 31, side plate 32, side plate 33, horizontal plate 4, side plate 5, side plate 6, horizontal plate 7, side plate 8, side plate 9, side plate 10; in this embodiment, the press frame is divided into a first side plate assembly, a second side plate assembly, an upper cross beam assembly, and a bottom workbench assembly; wherein the first side plate assembly corresponds to section A in the drawing, the second side plate assembly corresponds to section B in the drawing, the upper cross beam assembly corresponds to section C in the drawing, and the bottom workbench assembly corresponds to section D in the drawing; before welding, the first side plate assembly, the second side plate assembly, the upper cross beam assembly, and the bottom workbench assembly are first formed by means of insertion; and then welding is performed in accordance with the set order.

[0036] The specific assembly and welding method is as follows:

[0037] 1. Preparation of blanking

[0038] 1) Use a numerical control flame cutting machine for blanking, strictly according to the size of the drawing and adding 4mm to the overall length of the workpiece and 2mm to the width to reserve the welding shrinkage, and correct the flatness exceeding 1.5mm by flame.

[0039] 2) For the tolerances of the linear dimensions such as the fillet, chamfer, and angle of the cut parts that are not marked in the drawing, they should meet the requirements of C level in ISO2768. The form and position tolerances not marked in the drawing should meet the requirements of L level. (See Table 1)

[0040] Table 1 Linear dimension and form and position tolerance level

[0041]

[0042] 3) All the welding contact surfaces should be machined surfaces, and the surface roughness should be Ra=3.2, so as to ensure that there is no gap between the press assembly parts and meet the rigidity and strength requirements of the product.

[0043] 4) According to the above requirements, process side plate 1, bottom plate 2, side plate 3, side plate 31, side plate 32, side plate 33, horizontal plate 4, side plate 5, side plate 6, horizontal plate 7, side plate 8, side plate 9, side plate 10;

[0044] 2. Subsection assembly and welding

[0045] 2.1 Assemble the first side plate assembly and the second side plate assembly, and independently weld them;

[0046] One side plate 1 and one bottom plate 2 are assembled to form a segment A (corresponding to the first side plate assembly), and then another side plate 1 and another bottom plate 2 are assembled to form a segment B (corresponding to the second side plate assembly); the segment A and the segment B are each assembled separately and welded according to the WPS welding specification and the AWS-D14.5 requirement, the weld is a continuous weld, the preheating before welding is above 50°, and the weld leg height is 35mm.

[0047] 2.2 Assemble the upper cross beam assembly and the bottom workbench assembly;

[0048] A center plate 10 is inserted at the center of one side of the horizontal plate 7, and the horizontal plate 7 is perpendicular to the center plate 10; three side plates 6 are sequentially assembled on both sides of the center plate 10, and each side plate 6 is perpendicular to the center plate 10; then one side plate 5 is assembled on the outside of each of the two side plates 6, and the two side plates 5 are parallel to the center plate 10, thus the upper cross beam assembly is assembled and the upper cross beam assembly is formed;

[0049] A side plate 31 is inserted at one end of the bottom of the horizontal plate 4, a side plate 33 is inserted at the other end, and two side plates 32 are inserted in the middle, and the side plate 31, the side plate 33, and the two side plates 32 are parallel to each other; five side plates 8 are respectively inserted between the side plate 31 and the side plate 32, between the side plate 32 and the side plate 32, and between the side plate 32 and the side plate 33, and the five side plates 8 are parallel to each other and perpendicular to the side plate 31, the side plate 32, and the side plate 33, thus the bottom workbench assembly is completed and the bottom workbench assembly is formed;

[0050] 2.3 The upper cross beam assembly and the bottom workbench assembly are connected by using support pads and welding fixing plates, and the upper cross beam and the bottom workbench are assembled into a cross beam workbench assembly as a whole; specifically, the horizontal plate 7 of the upper cross beam assembly is aligned with the horizontal plate 4 of the bottom workbench assembly in parallel, and a plurality of support pads are arranged between the horizontal plate 7 and the horizontal plate 4, so that there is no gap between the horizontal plate 7 and the horizontal plate 4 of the workbench; then the horizontal plate 7 and the bottom workbench are welded into a whole by the welding of the fixing plate;

[0051] 2.4 Two people simultaneously weld the upper cross beam assembly and the bottom workbench assembly, and a flat weld is used during welding, and the upper cross beam assembly and the bottom workbench assembly are turned over four times during the welding process, so that the upper cross beam assembly and the bottom workbench assembly are rigidly fixed and the stress deformation is offset, so that the welding deformation is more easily controlled; during the entire welding process, the middle position can be welded first, and then the two side positions can be welded, or other welding methods can be used; Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 as shown in the drawings.

[0052] Wherein in the upper crossbeam assembly side, along the horizontal plate 7 and the center plate 10 longitudinal one side, along the horizontal plate 7 and the side plate 5 longitudinal one side are welded; corresponding to the bottom workbench assembly side, along the horizontal plate 4 and the side plate 31, the side plate 32, the side plate 33 longitudinal one side are welded;

[0053] Then turn over, in the upper crossbeam assembly side, along the horizontal plate 7 and the center plate 10 longitudinal other side are welded, along the horizontal plate 7 and the side plate 5 longitudinal one side are welded; corresponding to the bottom workbench assembly side, along the horizontal plate 4 and the side plate 31, the side plate 32, the side plate 33 longitudinal other side are welded;

[0054] Then turn over, in the upper crossbeam assembly side, the same side gap between the side plate 6 and the center plate 10, the side plate 5 can be welded from the middle to both sides; corresponding to the bottom workbench assembly side, the same side gap between the side plate 8 and the horizontal plate 4, the side plate 31, the side plate 32, the side plate 33 can be welded from the middle to both sides;

[0055] Then turn over, in the upper crossbeam assembly side, the other side gap between the side plate 6 and the center plate 10, the side plate 5 can be welded from the middle to both sides; corresponding to the bottom workbench assembly side, the other side gap between the side plate 8 and the horizontal plate 4, the side plate 31, the side plate 32, the side plate 33 can be welded from the middle to both sides;

[0056] The welding process described above adopts the positioning welding mode, wherein the welding seam of the positioning welding is required to be the same as the formal welding seam, and the welding of the segments C and D is completed according to the WPS welding specification.

[0057] 2.5 after the welding is completed, the fixed plate is cut off, and then the bottom workbench assembly and the upper crossbeam assembly after the welding are split into two separate upper crossbeam assemblies and bottom workbench assemblies.

[0058] The present application adds the folding welding of segmented components in the assembly sequence of the frame type press, and the upper crossbeam and the bottom workbench are folded into a crossbeam workbench assembly after being assembled respectively, the support pad in the middle of the upper crossbeam and the bottom workbench makes there be no contact gap between the crossbeam and the bottom plate of the workbench, and the welding of the fixed plate makes the upper crossbeam and the bottom workbench become a whole. Two people symmetrically weld the flat welding seam at the same time, the upper crossbeam and the bottom workbench are rigidly fixed and the stress deformation is offset to each other during the welding process, so that the welding deformation is more easily controlled.

[0059] After welding, it is divided into two separate upper beam assembly, bottom workbench assembly. Finally, the overall assembly welding is carried out, the welding deformation is controlled to the maximum extent in the segmented welding, the welding operation amount of the final overall assembly is minimized, and the welding deformation is also controlled to the optimal state,

[0060] 2.4 After the welding of segment A, segment B, segment C, segment D is completed, the weld VT, MT is monitored, the linear size, flatness and straightness meet the tolerance requirements, and the overall assembly process is entered.

[0061] 3. Overall assembly welding

[0062] 3.1 Marking and pre-assembly (side assembly) on the assembly platform.

[0063] 3.2 Assemble segment A on the assembly platform, ensure that the perpendicularity is ≤1.5mm; it should be noted that segment A is turned over 90 degrees in this place, and then assembled to the assembly platform; 400*200*275mm equal height blocks are used to support segment C and segment D, and at the same time, the equal height blocks are used for height positioning of segment C and segment D; for details, see Figure 1 ; Figure 6

[0064] 3.3 Take segment A as the zero reference point, assuming that the position of segment A is the rear side, then sequentially fold segment C and segment D from the left and right sides of segment A to the pre-set position (folding assembly); then fold segment B from the front side to segment A until it reaches the pre-set position, then perform positioning welding, and check the linear size, perpendicularity and diagonal size.

[0065] 3.4 Use carbon dioxide gas shielded welding equipment, the filler metal is AWS 5.18ER70S-6, the specification is Φ1.2mm, and the protective gas is 80% Ar+20% CO2.

[0066] 3.5 Turn the press over 90°, use the flat position for the welds at the connections of the side plates, upper cross beams and bottom workbench, and use the symmetrical welding method for multi-layer and multi-pass welding. Long welds are welded using the segmented back welding method.

[0067] 4. Welding appearance inspection

[0068] 4.1 Check whether the weld and base material are smoothly transitioned, and the weld and base material are required to be smoothly transitioned.

[0069] 4.2 Check whether there are cracks, pores, craters, slag inclusions, etc. at the welding position, and cracks, pores, craters, slag inclusions, etc. are not allowed.

[0070] 4.3 The depth of the weld undercut is not greater than 0.5mm, and the continuous length of the weld undercut is not more than 20mm ​

[0071] 5. Flame straightening

[0072] Flame straightening is performed on the position where the local flatness is out of tolerance or the deformation is large. The deformed position is heated by neutral flame with temperature between 500℃ and 650℃ (appearance is reddish brown). If the deformation is too large, weight is added on the protrusion.

[0073] 6. Heat treatment (no innovation point)

[0074] The whole stress relief annealing is performed by using heat treatment furnace to remove the welding stress existing in the weld. Details are shown in Figure 7 ;

[0075] 7. Surface treatment

[0076] Sand blasting treatment is performed according to the product to ISO Sa2 1 / 2, and painting is performed. The film thickness of the primer is not less than 0.08mm, the film thickness of the topcoat is not less than 0.05mm, and the total dry film thickness is not less than 0.125mm.

[0077] Finally, it should be noted that the relational terms such as first and second and the like can merely be used to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between or among the entities or actions.

[0078] The above only describes the preferred embodiments of the present application and is not used to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of assembling a rapid prototyping press frame, characterized by, It comprises the following steps: Step 1: divide the press frame into a first side plate assembly, a second side plate assembly, an upper crossbeam assembly, and a bottom workbench assembly, and assemble them separately; Step 2: weld the first side plate assembly and the second side plate assembly separately; Step 3: fold the upper crossbeam assembly and the bottom workbench assembly, fill the gap between them with support pads to ensure that there is no gap between them, and fix them together through a fixing plate to form a whole; Step 4: weld the upper crossbeam assembly and the bottom workbench assembly at the same time, use flat welding seams, and remove the fixing plate after welding to separate the upper crossbeam assembly and the bottom workbench assembly into two independent assemblies; Step 5: draw a line on the assembly platform, and then assemble and weld the first side plate assembly, the second side plate assembly, the upper crossbeam assembly, and the bottom workbench assembly; Step 6: vertically fix the first side plate assembly in step 2 on the assembly platform, take the first side plate assembly as the zero reference, position the height of the upper crossbeam assembly and the bottom workbench assembly obtained in step 4 through the equal height block, move the upper crossbeam assembly and the bottom workbench assembly from the left and right sides of the first side plate assembly to the set position, and position and weld the upper crossbeam assembly and the bottom workbench assembly with the first side plate assembly.

2. The method of assembling a rapid prototyping press frame of claim 1 wherein, It also comprises step 7: moving the second side plate assembly in step 2 from the front side of the first side plate assembly to the set position, and positioning and welding the second side plate assembly with the upper crossbeam assembly and the bottom workbench assembly.

3. The method of assembling a rapid prototyping press frame of claim 2, wherein, It also comprises step 8: turning the whole press frame obtained in step 7 by 90°, and using flat welding and symmetrical welding to perform multi-layer and multi-pass welding on the weld seams of the connection between the first side plate assembly, the second side plate assembly, the upper crossbeam assembly, and the bottom workbench assembly.

4. The method of assembling a rapid prototyping press frame of claim 3 wherein, It also comprises step 9: inspecting the appearance of the weld of the press frame obtained in step 8.

5. The method of assembling a rapid prototyping press frame of claim 4 wherein, It also comprises step 10: flame straightening the press frame.

6. The method of assembling a rapid prototyping press frame of claim 5, wherein, It also comprises step 11: heat treating the press frame.

7. The method of assembling a rapid prototyping press frame of claim 6 wherein, It also comprises step 12: surface treating the press frame.

8. The method of assembling a rapid prototyping press frame of claim 7 wherein, In step 12, sandblasting the press frame and painting it.

9. A press frame characterized by, Obtained by the assembly method of the rapid prototyping press frame according to any one of claims 1-8.

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