Tailor-welded component manufacturing method and tailor-welded component

Abstract

The invention discloses a tailor-welded component manufacturing method and a tailor-welded component, and the tailor-welded component manufacturing method comprises the following steps: performing combined blanking on each splicing section to obtain a unit combined blanking plate of each splicing section; the splicing end of each unit combination blanking plate is subjected to pre-welding machining; splicing and welding the splicing ends of all the unit combined blanking plates to obtain a component combined blanking plate; the component combination blanking plate is divided into at least two tailor-welded components, so that at least two original independent short welding seams can be connected into a single long welding seam, continuous automation of pre-welding processing, welding seam welding and welding seam flaw detection can be realized, the production efficiency is greatly improved, meanwhile, arc starting and arc stopping are reduced through combined production, and the production cost is reduced. In addition, by means of combined production, the length-width ratio of the component combined blanking plate obtained through tailor welding can be remarkably reduced, the rigidity is improved, and welding deformation is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of tailor-welded component manufacturing, and in particular relates to a tailor-welded component manufacturing method and a tailor-welded component. Background Art

[0002] In recent years, construction machinery and equipment have developed towards ultra-long and lightweight. Figure 1 and Figure 2 As shown, in order to reduce the weight of the structural parts as much as possible, some structural parts are designed as super-long curved parts made of multiple sections of high-strength steel plates of unequal thickness (section 1, section 2, section 3, section 4, section 5) welded together. Because the forces at the two ends are greater and the forces in the middle are smaller, the two ends are generally thick plates and the middle is thin plates. The traditional manufacturing method of this type of structural parts is to cut and bend each section of the plate separately, and then weld them together. The specific steps are:

[0003] 1) CNC cutting of sections 1, 2, 3, 4 and 5 (including holes);

[0004] 2) Milling butt welding grooves of sections 1, 2, 3, 4 and 5 respectively;

[0005] 3) Segment 2, segment 3 and segment 4 are numerically controlled bent respectively;

[0006] 4) Segments 1, 2, 3, 4 and 5 are spliced ​​together and require fetal membranes to assist in positioning;

[0007] 5) Use MAG welding (Metal Active Gas Arc Welding) to perform butt welding at the splicing position, with a welding groove of 60° and a back plate for double-sided welding;

[0008] 6) Inspection: including dimension inspection and weld flaw detection.

[0009] The above-mentioned traditional manufacturing method has the following problems:

[0010] 1) Each weld seam is relatively short, and it is difficult to achieve efficient groove processing, welding and flaw detection for a single part;

[0011] 2) The two ends of the spliced ​​weld are the arc starting and ending areas, and the welding quality is difficult to control, which is prone to defects such as arc pits and lack of fusion;

[0012] 3) High-strength steel plates have high strength and large elastic modulus, large springback when bent, and poor bending accuracy, which leads to problems such as misalignment, misalignment in thickness or width, and uneven gaps when the sections are spliced;

[0013] 4) Cut before welding. Narrow and long strip parts are prone to shrinkage, bending, warping and other deformations after welding. The relative position size errors of each hole are large, and subsequent processes often require trimming and cutting;

[0014] 5) Construction machinery is usually multi-variety and small-batch production. The length, bending position, bending angle, and bending radius of each variety of parts are different. Different membranes are required for welding, which makes production organization difficult;

[0015] 6) The joint gap is uneven, and a back plate must be used to assist welding. Only traditional MAG welding can be used, and a large amount of welding wire is required. Summary of the invention

[0016] In view of the above defects or shortcomings, the present invention provides a method for manufacturing a tailored welded component and a tailored welded component, aiming to solve at least one of the above technical problems.

[0017] To achieve the above-mentioned object, the present invention provides a method for manufacturing a tailor-made welded component in a first aspect, wherein the method for manufacturing a tailor-made welded component comprises:

[0018] Combining and blanking each splicing segment respectively to obtain a unit combination blanking plate for each splicing segment, wherein the unit combination blanking plate has at least two identical splicing segments arranged along the width direction;

[0019] Carry out pre-welding processing on the splicing ends of each unit combined blanking plate respectively;

[0020] The splicing ends of all unit combined blanking plates are respectively welded to obtain component combined blanking plates;

[0021] The component assembly blank is divided into at least two tailor-welded components.

[0022] In one embodiment of the present invention, dividing the component assembly blank plate into at least two tailor-welded components comprises:

[0023] Performing a first trimming operation on the long side of each tailor-welded component extending along the length direction on the component assembly blanking plate, wherein the first trimming operation is performed from the middle position of the long side to both ends;

[0024] A second trimming operation is performed on the remaining short side of each tailor-welded component to separate the tailor-welded component into at least two tailor-welded components.

[0025] In one embodiment of the present invention, performing a first trimming operation on a long side of each tailor-welded component arranged along a length direction on a component assembly blanking plate comprises:

[0026] Cutting the outer contour of the component assembly blank plate to obtain a component assembly contour plate, wherein the component assembly contour plate is arranged with at least two tailored welded components along the width direction, any two adjacent tailored welded components are arranged with their long sides collinearly on the component assembly contour plate, and the outer contour of the component assembly contour plate includes the contours of the two outermost long sides of the at least two tailored welded components;

[0027] Perform the first trimming operation on all long edges of the component assembly outline that are collinearly arranged.

[0028] In one embodiment of the present invention, performing a first trimming operation on all long edges arranged in a co-linear manner on a component assembly outline plate comprises:

[0029] Selecting a centrally set long edge from all the long edges arranged in a co-linear manner on the component combination outline plate and performing a first trimming operation to obtain two component split plates;

[0030] If there are still at least two tailor-made welded component layouts in the component partition plate, continue to perform the first trimming operation on the long edge centrally arranged in the component partition plate until only one tailor-made welded component layout remains.

[0031] In one embodiment of the present invention, before performing the first trimming operation on the long side of each tailor-welded component arranged along the length direction on the component assembly blanking plate, the method further includes:

[0032] A hole cutting operation is performed on the component assembly blanking plate, wherein the hole cutting operation is performed from the middle position of the component assembly blanking plate to the surrounding periphery in sequence.

[0033] In one embodiment of the present invention, the pre-welding processing of the splicing ends of each unit assembly blank plate includes:

[0034] Chamfering the thick plate end of the two spliced ​​ends to be welded so that the thickness of the two spliced ​​ends at the welding position is the same;

[0035] When the thickness of the thin plate splicing end of the two splicing ends to be welded is greater than the preset groove opening thickness, a groove with a preset groove angle is opened on the chamfering processing side for the two splicing ends to be welded.

[0036] In one embodiment of the present invention, the length of the chamfering process is set to be 4 to 5 times the difference between the thicknesses of the two splicing ends.

[0037] In one embodiment of the present invention, the preset groove thickness is 8 mm.

[0038] In one embodiment of the present invention, the preset groove angle is 30° to 45°.

[0039] In one embodiment of the present invention, the splicing ends of all unit assembly blanking plates are respectively welded to obtain the component assembly blanking plate, which includes:

[0040] Plasma hybrid welding or laser hybrid welding is used to perform single-sided welding on the welding gap between the two joint ends from the chamfered side to obtain a component combined blank plate with double-sided formed welds.

[0041] In one embodiment of the present invention, before dividing the component assembly blank plate into at least two tailor-welded components, the method further includes:

[0042] Carry out flaw detection on the welds on the component assembly blanking plates.

[0043] In one embodiment of the present invention, each splicing section is subjected to combined blanking to obtain a unit combined blanking plate for each splicing section, which includes:

[0044] According to the width of the raw material, a layout design is performed for a splicing section with the largest blanking width requirement in the tailor-made welded component to obtain a first layout size, wherein the width of the first layout size is sufficient for at least two corresponding splicing sections to be laid out along the width direction;

[0045] Performing layout design on the remaining splicing segments in the tailor-made welded component according to the layout quantity of the splicing segments in the first layout size, so as to obtain second layout sizes of the remaining splicing segments respectively;

[0046] Cutting is performed according to the first layout size and the second layout size to obtain a unit combination blanking plate for each splicing section.

[0047] In one embodiment of the present invention, after the component assembly blank plate is divided into at least two tailor-welded components, the method further includes:

[0048] The tailor-welded components are subjected to a bending operation, wherein the bending operation uses a four-roller plate rolling device including an upper roller mechanism, a lower roller mechanism, a left roller mechanism and a right roller mechanism, and the upper and lower positions and / or the left and right positions of the left roller mechanism and / or the right roller mechanism are adjustable.

[0049] To achieve the above object, a second aspect of the present invention provides a tailored welded component, wherein the tailored welded component is manufactured using the tailored welded component manufacturing method described above.

[0050] Through the above technical solution, the method for manufacturing tailor-made welded components provided by the present invention has the following beneficial effects:

[0051] When the above-mentioned method for manufacturing tailor-welded components is used, at least two combined blankings are used when blanking each spliced ​​section, and the unit combined blanking plates of the combined blankings are first welded and then the tailor-welded components are divided, so that at least two separate short welds can be connected into a single long weld, and pre-welding processing (for example: groove processing), weld welding and weld flaw detection can all be continuously automated, greatly improving production efficiency. At the same time, combined production also reduces the occurrence of arc starting and closing, thereby avoiding the occurrence of end welding defects. In addition, combined production can also significantly reduce the aspect ratio of the combined blanking plates of the components obtained by welding, increase rigidity, and reduce welding deformation.

[0052] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings:

[0054] Figure 1 It is a structural schematic diagram of a structural member in the background technology from one perspective;

[0055] Figure 2 It is a structural schematic diagram of a structural member in the background technology from another perspective;

[0056] Figure 3 is a flow chart of a method for manufacturing tailor-welded components according to one embodiment of the present invention;

[0057] Figure 4 is a schematic structural diagram of a first unit combined blanking plate according to an embodiment of the present invention;

[0058] Figure 5 is a structural schematic diagram of a component assembly blanking plate according to an embodiment of the present invention;

[0059] Figure 6 is a schematic diagram of a structure in which two splicing ends are chamfered according to an embodiment of the present invention;

[0060] Figure 7 is a schematic diagram of a structure in which two splicing ends are processed with chamfers and grooves according to an embodiment of the present invention;

[0061] Figure 8 It is a structural schematic diagram of a hole cutting operation on a component assembly blanking plate according to an embodiment of the present invention;

[0062] Fig. 9 is a schematic diagram of a structure for executing step S410 according to an embodiment of the present invention;

[0063] Fig.10 is a schematic diagram of a structure for executing step S420 according to an embodiment of the present invention;

[0064] Fig.11 is a schematic diagram of a structure before executing step S430 according to an embodiment of the present invention;

[0065] Fig.12 is a structural diagram of the subsequent step S430 according to an embodiment of the present invention;

[0066] Fig.13 is a schematic diagram of a structure for executing step S440 according to an embodiment of the present invention;

[0067] Fig.14 is a structural schematic diagram of a tailor-welded component undergoing a positive bending operation according to an embodiment of the present invention;

[0068] Fig.15 1 is a schematic structural diagram of a reverse bending operation of a tailor-welded component according to an embodiment of the present invention.

[0069] Description of reference numerals:

[0070] 10 Splicing section 10a First splicing section

[0071] 11 Chamfer

[0072] 20 unit combined blanking plate 20a first unit combined blanking plate

[0073] 20b Second unit combined blanking plate 20c Third unit combined blanking plate

[0074] 20d Fourth unit combined blanking plate 20e Fifth unit combined blanking plate

[0075] 30 Component combination blanking plate 40 Component combination contour plate

[0076] 50 Tailor-welded component 51 Long side

[0077] 52 short side 53 process hole

[0078] 61 Upper roller mechanism 62 Lower roller mechanism

[0079] 63 Left roller mechanism 64 Right roller mechanism DETAILED DESCRIPTION

[0080] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0081] The following describes a method for manufacturing a tailor-made welded component and a tailor-made welded component according to the present invention with reference to the accompanying drawings.

[0082] like Figures 3 to 5 as well as Fig.13 As shown, the present invention provides a method for manufacturing a tailor-made welded component, wherein the method for manufacturing a tailor-made welded component comprises:

[0083] Step S100 , respectively perform combined blanking on each splicing segment 10 to obtain a unit combined blanking plate 20 for each splicing segment 10 , wherein the unit combined blanking plate 20 has at least two identical splicing segments 10 arranged along the width direction.

[0084] It is understandable that the present invention will be Figure 1 and Figure 2 The structural member shown in the figure is used as an example of a welded component 50 to be produced. The segments 1-5 of the structural member are respectively set as five splicing segments 10 in the welded component 50. The five splicing segments 10 are set as the first splicing segment 10a, the second splicing segment, the third splicing segment, the fourth splicing segment and the fifth splicing segment from left to right. In the prior art, each splicing segment 10 is cut according to the size of a splicing segment 10 when cutting. However, in the present invention, each splicing segment 10 is cut in combination when cutting, that is, the unit combined blanking plate 20 obtained by cutting can have at least two identical splicing segments 10 arranged in the width direction, and the first splicing segment 10 is arranged. The unit combination blanking plate 20 with a can be set as the first unit combination blanking plate 20a, the unit combination blanking plate 20 with the second splicing section can be set as the second unit combination blanking plate 20b, the unit combination blanking plate 20 with the third splicing section can be set as the third unit combination blanking plate 20c, the unit combination blanking plate 20 with the fourth splicing section can be set as the fourth unit combination blanking plate 20d, and the unit combination blanking plate 20 with the fifth splicing section can be set as the fifth unit combination blanking plate 20e. The arrangement along the width direction is to enable the unit combination blanking plates 20 with different splicing sections 10 to be welded along the length direction.

[0085] Step S200 , performing pre-welding processing on the splicing ends of each unit assembly blanking plate 20 .

[0086] Specifically, if the thickness of two adjacent splicing sections 10 is different, in order to achieve welding, the unit combined blanking plate 20 obtained by cutting can generally be chamfered 11 on the splicing end of the thicker one of the two before welding, so that the end face thickness is equal to the splicing end of the thinner one, thereby achieving thickness transition. In addition, grooves can be processed at the two adjacent splicing ends to ensure that the welding is in place.

[0087] Step S300 , respectively welding the spliced ​​ends of all unit assembly blank plates 20 to obtain component assembly blank plates 30 .

[0088] Specifically, the splicing end of the first unit combined blanking plate 20a can be welded to the splicing end of the second unit combined blanking plate 20b set toward the left, the splicing end of the second unit combined blanking plate 20b set toward the right can be welded to the splicing end of the third unit combined blanking plate 20c set toward the left, the splicing end of the third unit combined blanking plate 20c set toward the right can be welded to the splicing end of the fourth unit combined blanking plate 20d set toward the left, and the splicing end of the fourth unit combined blanking plate 20d set toward the right can be welded to the splicing end of the fifth unit combined blanking plate 20e. The order of the above welding is not limited, as long as the component combined blanking plate 30 is finally obtained.

[0089] Step S400 , dividing the component assembly blank plate 30 into at least two tailor-welded components 50 .

[0090] When the above-mentioned method for manufacturing tailor-welded components is used, at least two combined blankings are used when blanking each spliced ​​section 10, and the unit combined blanking plates 20 of the combined blankings are first welded and then the tailor-welded components 50 are divided, so that at least two separate short welds can be connected into a single long weld, and pre-welding processing (for example: groove processing), weld welding and weld flaw detection can all be realized in a continuous and automated manner, and production efficiency is greatly improved. At the same time, combined production also reduces the occurrence of arc starting and closing, thereby avoiding the occurrence of end welding defects. In addition, combined production can also significantly reduce the aspect ratio of the component combined blanking plate 30 obtained by welding, increase rigidity, and reduce welding deformation.

[0091] It should be noted that the welded component 50 includes but is not limited to being manufactured by welding multiple sections because each section has different thicknesses, but the welded component manufacturing method provided by the present invention is particularly suitable for manufacturing multiple sections of welded components 50 with unequal thicknesses.

[0092] In one embodiment of the present invention, step S400, dividing the component assembly blank plate 30 into at least two tailor-welded components 50 includes:

[0093] Step S405 , performing a first trimming operation on the long side 51 of each tailor-welded component 50 extending along the length direction on the component assembly blanking plate 30 , wherein the first trimming operation is performed from the middle position of the long side 51 to both ends.

[0094] Specifically, each welded component 50 has a long side 51 extending in the length direction. The long side 51 of each welded component 50 arranged on the component assembly blanking plate 30 can be cut first, and when cutting each long side 51, it can be cut from the middle position of the long side 51 to both ends. On the one hand, the middle is a thin plate and the two ends are thick plates. The position cut first has a smaller deformation due to the large constraint, and the position cut later has a larger deformation due to the small constraint. Therefore, the thin plate position that is easy to deform is cut first. When cutting, the thin plate has a smaller deformation due to the thick plate constraint at both ends, and then the thick plate position that is not easy to deform is cut at both ends; on the other hand, cutting from the middle to both ends can disperse the cutting heat from the middle to both ends, and the heat accumulation is small compared to cutting from left to right in sequence, and the deformation is smaller. It should be particularly noted that the middle position where the cutting starts is not necessarily the point in the middle of the entire long side 51. The middle position is only defined relative to the two ends. The middle position can be any point on the long side 51 of the middlemost splicing section 10.

[0095] Step S440 , performing a second trimming operation on the remaining short sides 52 of each tailored welded component 50 to separate the tailored welded components 50 into at least two tailored welded components 50 .

[0096] More specifically, if Fig.13 As shown, after the long sides 51 of each welded component 50 are cut, if there are still short sides 52 left, at least two welded components 50 can be obtained by performing the second trimming operation on the remaining short sides 52. It should be particularly noted that when the first trimming operation layout is performed on the long sides 51 of the welded component 50, if the end of the welded component 50 is an arc with a smooth transition, the long side 51 of the layout can extend to the end, and some short sides 52 of the welded component 50 can be cut in the first trimming operation.

[0097] In one embodiment of the present invention, step S405, performing a first trimming operation on the long side 51 of each tailor-welded component 50 arranged along the length direction on the component assembly blank plate 30 includes:

[0098] Step S410, cutting the outer contour of the component combination blanking plate 30 to obtain a component combination contour plate 40, wherein the component combination contour plate 40 is arranged with at least two welded components 50 along the width direction, and any two adjacent welded components 50 are arranged on the component combination contour plate 40 with their long sides 51 colinearly, and the outer contour of the component combination contour plate 40 includes the contours of the two outermost long sides 51 of at least two welded components 50.

[0099] Step S415 , performing a first trimming operation on all the long edges 51 of the component assembly outline plate 40 that are arranged in a collinear manner.

[0100] Specifically, by arranging any two adjacent welded components 50 on the component assembly contour plate 40 with their long sides 51 collinear, the number of times the long sides 51 are cut can be reduced, further achieving the purpose of improving production efficiency. It should be particularly noted that each welded component 50 has two upper and lower long sides 51, and the shape of the two long sides 51 can be straight lines that are all horizontally set, or can be straight lines that are partially horizontally set. If they are straight lines that are all horizontally set, when any two adjacent welded components 50 are arranged on the component assembly contour plate 40, the long sides 51 can be completely collinear; if they are straight lines that are partially horizontally set, such as Figure 1 and Figure 2 For the structural parts shown in the figure, when any two adjacent welded components 50 are arranged on the component combination contour plate 40, only the horizontally set straight lines can be arranged in line, and the remaining long sides 51 cannot be arranged in line. Therefore, when performing the first trimming operation, you can choose to perform the first trimming operation on the long side 51 of one of the welded components 50. Since it is partially in line with the long side 51 of the other welded component 50, the part of the long side 51 of the other welded component 50 can also be cut, and the remaining long side 51 of the other welded component 50 can be completed together with the short side 52 in the second trimming operation.

[0101] In addition, the component combination blanking plate 30 is formed by splicing at least two unit combination blanking plates 20 along the length direction. Each unit combination blanking plate 20 can be a square plate when blanking. After splicing to form the component combination blanking plate 30, the component combination blanking plate 30 can be divided and laid out into at least two welded components 50. Since any two adjacent welded components 50 can be laid out in a colinear manner with their long sides 51 on the component combination contour plate 40 during layout, all the welded components 50 on the component combination blanking plate 30 are laid out together. Therefore, cutting can also be performed along the outermost contours of all the welded components 50 that have been laid out to obtain the component combination contour plate 40. Specifically, it can be as follows Fig. 9 As shown, Fig. 9 The thick solid line in the figure is the cutting outer contour, which not only completes the cutting of the long sides 51 of the two outermost welded components 50, but also realizes the cutting positioning of all welded components 50.

[0102] In one embodiment of the present invention, step S415, performing a first trimming operation on all the long edges 51 of the component assembly outline plate 40 arranged in a collinear manner, comprises:

[0103] Step S420, selecting a centrally arranged long edge 51 from among all the long edges 51 arranged in a co-linear manner on the component assembly outline plate 40 and performing a first trimming operation to obtain two component split plates;

[0104] Step S430: If there are still at least two welded components 50 arranged in the component partition plate, continue to perform the first trimming operation on the long edge 51 centrally arranged in the component partition plate until only one welded component 50 is left in the arrangement.

[0105] Specifically, if there are at least three collinear long sides 51, the middle long side 51 can be selected for cutting first, and then the other long sides 51 can be cut, so that the cutting heat is dissipated from the middle to both sides, so that the cutting heat accumulation is small and the deformation is small. In the embodiment provided by the present invention, there are five welded components 50 arranged on the component combination contour plate 40, and there are four collinear long sides 51 in the five welded components 50. You can first select one of the two long sides 51 set in the middle to perform the first trimming operation to obtain two component partition plates, specifically as follows Fig.10 As shown, the solid black line in the figure completes the current processing long side 51, but one of the component partition plates has two welded components 50 layouts, and only one long side 51 of the collinear layout is left for cutting, as shown in FIG. Fig.12 The long side 51 processed as shown, another component partition plate has three welded components 50 layout, and two long sides 51 of the collinear layout are left for cutting, as shown in FIG. Fig.11 and Fig.12 As shown in the processed long sides 51 , since there is no centering setting for the two collinear long sides 51 , any one of the long sides 51 can be selected for cutting until the cutting of all the collinear long sides 51 is completed.

[0106] In one embodiment of the present invention, before performing the first trimming operation on the long side 51 of each tailor-welded component 50 arranged along the length direction on the component assembly blank plate 30, the process further includes:

[0107] The component assembly blanking plate 30 is subjected to a hole cutting operation, wherein the hole cutting operation is performed from the middle position of the component assembly blanking plate 30 to the periphery in sequence.

[0108] It is understandable that if a process hole 53 is required to be opened on the welded component 50, the hole cutting operation of the process hole 53 can be set after the component assembly blanking plate 30 is spliced ​​and before the single welded component 50 is divided, so that the hole cutting operation on all the welded components 50 on the component assembly blanking plate 30 can be completed at one time. At the same time, a process hole 53 needs to be opened on each splicing section 10 of the welded component 50. If there are five welded components 50 arranged on the component assembly contour plate 40, the process holes 53 on the component assembly blanking plate 30 can be formed into a shape with the middle one as the center and radiating to the surrounding periphery. The hole cutting operation is carried out in sequence from the middle to the periphery, which can make the generated cutting heat dissipate outward regularly to prevent heat accumulation and deformation, such as Figure 8As shown, the process holes 53 on the component assembly blanking plate 30 can be cut in the order of 53a, 53b, 53c... to 53j. Of course, the present invention is not limited to this, and other cutting orders that radiate from the center to the periphery are also possible.

[0109] In one embodiment of the present invention, step S200, respectively performing pre-welding processing on the splicing ends of each unit assembly blanking plate 20 includes:

[0110] Step S210, chamfering 11 is performed on the thick plate of the two splicing ends to be welded, so that the thickness of the two splicing ends at the welding position is the same.

[0111] It can be understood that, among the two splicing ends to be welded, there is one splicing end whose plate thickness is greater than that of the other splicing end, and the splicing end with the larger plate thickness can be defined as a splicing end set as a thick plate. Specifically, the splicing end with the larger plate thickness can be chamfered 11 to achieve thickness transition, so that the welded component assembly blank plate 30 has a smooth transition at the thickness mutation point, thereby increasing the beauty and reliability of the product.

[0112] Step S220, when the thickness of the thin plate of the two welded ends is greater than the preset groove opening thickness, a groove with a preset groove angle is opened on the chamfering 11 processing side of the two welded ends.

[0113] It can be understood that the splicing end with the smaller plate thickness in the two splicing ends to be welded can be defined as the splicing end set as a thin plate, and only when the splicing end set as a thin plate is greater than the preset groove opening thickness, it is necessary to open a groove on the chamfered 11 processing side of the two splicing ends to ensure that it can be welded to the bottom in the case of a larger thickness. Figure 7 As shown; in the case where the splicing end of the thin plate is smaller than the preset groove opening thickness, there is no need to open the groove, and the welding equipment can also weld to the bottom between the welding gaps, thereby reducing the welding workload and the amount of welding wire filling. Figure 6 shown.

[0114] In one embodiment of the present invention, the length of the chamfer 11 is set to 4 to 5 times the difference between the thicknesses of the two splicing ends. Specifically, the length L of the chamfer 11 is 4 (t2-t1) to 5 (t2-t1), t1 represents the thickness of the splicing end set as a thin plate, and t2 represents the thickness of the splicing end set as a thick plate. The thickness transition is performed with a reasonable size to ensure the stability of the splicing position.

[0115] In one embodiment of the present invention, the preset groove opening thickness may be 8 mm. Specifically, when the thickness of the splicing end set as a thin plate is greater than 8 mm, a groove is opened on the processing side of the chamfer 11, so that the welding equipment can weld the two splicing ends from the processing side of the chamfer 11; when the thickness of the splicing end set as a thin plate is less than 8 mm, there is no need to open a groove, and the welding equipment welds the splicing gap reserved between the two splicing ends.

[0116] In one embodiment of the present invention, the preset groove angle may be 30° to 45° to adapt to the welding equipment used in the efficient welding process. Preferably, when the welding equipment is plasma hybrid welding or laser hybrid welding, the preset groove angle may be 30°.

[0117] In one embodiment of the present invention, step S300, respectively welding the spliced ​​ends of all unit assembly blanking plates 20 to obtain the component assembly blanking plate 30 includes:

[0118] Plasma hybrid welding or laser hybrid welding is used to perform single-sided welding on the welding gap between the two splicing ends from the processing side of the chamfer 11 to obtain a component combined blank plate 30 with a double-sided formed weld.

[0119] It is understandable that, whether the groove is beveled or not, there will be a 0-1mm welding gap between the two joint ends at the joint position. The use of plasma composite welding or laser composite welding with efficient welding technology can make it possible to obtain a double-sided weld by welding from only one side. In addition, since welding is performed first and then cutting holes and trimming edges, there is no need to consider the assembly forming length and hole positioning during welding, so that the joint gap can be accurately controlled, which is conducive to the use of efficient welding processes such as plasma composite welding or laser composite welding that have high gap requirements, to achieve double-sided formation of single-sided welds, and the groove is small and the amount of welding wire filling is small, and the welding efficiency is increased by more than 50%.

[0120] In one embodiment of the present invention, step S400, before dividing the component assembly blank plate 30 into at least two tailor-welded components 50, further includes:

[0121] The welds on the component assembly blanking plate 30 are subjected to flaw detection.

[0122] Specifically, the welds are subjected to NDT inspection before the component combination blanking plate 30 is divided. Since the short welds at the same position of at least two welded components 50 can be connected into one long weld, the welds at the same position of at least two welded components 50 can be inspected at one time during the NDT inspection, which is beneficial to improving the efficiency of the NDT inspection.

[0123] In one embodiment of the present invention, step S100, respectively performing combined blanking on each splicing segment 10 to obtain a unit combined blanking plate 20 of each splicing segment 10 includes:

[0124] Step S110, layout design is performed on the splicing segment 10 with the largest blanking width requirement in the welded component 50 according to the width dimension of the raw material to obtain a first layout dimension, wherein the width of the first layout dimension can be used for layout of at least two corresponding splicing segments 10 along the width direction.

[0125] Specifically, the splicing section 10 with the largest blanking width requirement in the tailor-welded component 50 can be determined first. Figure 1 and Figure 2 The structural parts in the embodiment of the present invention are provided, and the splicing segment 10 with the largest blanking width requirement is the first splicing segment 10a. Then, the splicing segment 10 with the largest blanking width requirement is layout-designed according to the width dimension of the raw material, mainly to maximize the number of splicing segments 10 layout-oriented along the width direction, thereby achieving the purpose of fully utilizing the raw materials. In the embodiment provided by the present invention, the width dimension of the raw material can be used for sequential layout of five first splicing segments 10a along the width direction, and the first layout dimension is W1*L1, as shown in detail. Figure 4 shown.

[0126] Step S120 , performing layout design on the remaining splicing segments 10 in the tailor-welded component 50 according to the layout quantity of the splicing segments 10 in the first layout size, so as to obtain second layout sizes of the remaining splicing segments 10 .

[0127] It can be understood that after the layout quantity of the splicing segment 10 with the largest cutting width requirement is determined, the layout quantity of the combined welded components 50 and the layout quantity of the remaining splicing segments 10 are also determined and are consistent therewith. Since the cutting width requirements of the remaining splicing segments 10 are less than or equal to the splicing segment 10 with the largest cutting width requirement, the width dimensions of the raw materials can meet the cutting width requirements of the remaining splicing segments 10.

[0128] Step S130 , cutting materials according to the first layout size and the second layout size to obtain a unit combination blanking plate for each splicing segment 10 .

[0129] Furthermore, after determining the first layout size and the second layout size, the material can be cut directly according to the first layout size and the second layout size, or a processing allowance of 2mm to 3mm can be added to the width size based on the first layout size and the second layout size to perform fine processing on the splicing end during pre-welding processing.

[0130] In one embodiment of the present invention, after step S400, dividing the component assembly blank plate 30 into at least two tailor-welded components 50, the method further includes:

[0131] Step S500, performing a bending operation on the welded component 50, wherein the bending operation uses a four-roller plate rolling equipment including an upper roller mechanism 61, a lower roller mechanism 62, a left roller mechanism 63 and a right roller mechanism 64, and the upper and lower positions and / or left and right positions of the left roller mechanism 63 and / or the right roller mechanism 64 can be adjusted.

[0132] It can be understood that when the welded component 50 is a bending part, it can be bent at the end, that is, in the present application, it is welded first and then bent. Compared with bending first and then welding, welding is done first and the flat plates are spliced, which makes splicing easier and does not require the assistance of a membrane. At the same time, there are at least two places in the welded component 50 that need to be bent, and the bending radii of at least two of the bending operations are different, including both positive bending and reverse bending. In order to solve the problem of the difficulty of bending operations on such parts, a four-roller plate rolling device can be used. Compared with the traditional plate rolling device, the left and right roller mechanisms 64 of the four-roller plate rolling device can be adjusted up and down, left and right relative to the upper and lower roller mechanisms 62. On the one hand, the left roller mechanism 63 and the right roller mechanism 64 can be adjusted up and down according to the different bending directions of the parts, and the workpiece does not need to be flanging to complete positive bending or reverse bending. On the other hand, the left roller mechanism 63 and the right roller mechanism 64 can be adjusted left and right according to the different bending radii of the parts, and the horizontal distance between the upper roller mechanism 61 and the lower roller mechanism 62 can be adjusted to meet different bending radii. Fig.14 As shown, when the positive bending is performed, the left roller mechanism 63 is adjusted to the side lower roller, and cooperates with the upper and lower roller mechanisms 62 to complete the bending; Fig.15 As shown, when the reverse bending is performed, the right roller mechanism 64 is adjusted to the side upper roller, and the bending is completed in cooperation with the upper and lower roller mechanisms 62. Of course, the present invention is not limited thereto, and the tailor-welded component 50 can also be a straight piece without the need for a bending operation.

[0133] Specifically, the present invention adopts a technical solution of first combining blanking and welding, and then overall cutting and bending, to achieve high-precision and high-efficiency manufacturing of narrow and long curved parts formed by welding multiple sections of high-strength steel plates of unequal thickness. The specific steps of the manufacturing method of the welded component can be:

[0134] 1. According to the width of the raw materials, the layout design of the joint section with the largest blanking width requirement in the welded component is carried out to obtain the first layout size W1*L1;

[0135] 2. Perform layout design on the remaining splicing segments in the tailor-made welded component according to the layout quantity of the splicing segments in the first layout size, so as to obtain the second layout sizes of the remaining splicing segments respectively;

[0136] 3. Cutting is performed according to the first layout size and the second layout size to obtain a unit combination blanking plate for each splicing section;

[0137] 4. Determine the length of the chamfering process and whether to perform groove processing, wherein the length of the chamfering process is set to 4 to 5 times the difference in thickness between the two splicing ends. When the thickness of the splicing end set as a thin plate in the two splicing ends to be welded is greater than the preset groove opening thickness, determine to perform groove processing;

[0138] 5. All the splicing sections are spliced ​​and placed in order and a welding gap of 0 to 1 mm is left at the splicing position;

[0139] 6. Use plasma composite welding or laser composite welding to perform single-sided welding on the welding gap between the two joint ends from the chamfering processing side to obtain a component combined blanking plate with a double-sided formed weld;

[0140] 7. Perform hole cutting operation on the component assembly blanking plate;

[0141] 8. Cut the outer contour of the component combination blanking plate to obtain the component combination contour plate;

[0142] 9. Select a centrally set long edge from all the long edges arranged in a co-linear manner on the component combination outline plate and perform a first trimming operation to obtain two component split plates;

[0143] 10. If there are still at least two welded components in the component partition plate, continue to perform the first trimming operation on the long edge centrally arranged in the component partition plate until only one welded component is left;

[0144] 11. Perform a second trimming operation on the remaining short sides of each tailor-welded component to separate the tailor-welded component into at least two tailor-welded components;

[0145] 12. Perform bending operations on welded components;

[0146] 13. Dimension inspection.

[0147] Compared with the prior art, the above-mentioned method for manufacturing tailor-made welded components has the following advantages:

[0148] 1. After the narrow and long parts are assembled, multiple short welds are connected into a single long weld. Groove processing, weld welding and weld flaw detection can all achieve continuous automated production, greatly improving production efficiency. At the same time, arc starting and closing are reduced, avoiding end welding defects;

[0149] 2. After the multi-piece assembly, the length-to-width ratio of the parts is significantly reduced, the rigidity of the parts is increased, and the welding deformation is reduced;

[0150] 3. Welding first and then cutting avoids the influence of welding deformation on dimensional accuracy, and the dimensional accuracy of each hole is higher;

[0151] 4. First weld and then bend. The flat plates are butt-jointed during splicing, which makes splicing easy and does not require the assistance of fetal membranes.

[0152] 5. The splicing gap can be precisely controlled during splicing, which is conducive to adapting to high-efficiency welding processes such as plasma composite welding and laser welding that have high requirements for gaps, realizing single-sided welding and double-sided forming, and the groove is small and the amount of welding wire filling is small, and the welding efficiency is increased by more than 50%;

[0153] 6. After splicing, the parts are generally thin in the middle and thick at both ends. Cutting from the middle to both ends reduces deformation compared to individual cutting before splicing.

[0154] In addition, the present invention also provides a tailored welded component, wherein the tailored welded component is manufactured according to the above-mentioned tailored welded component manufacturing method. Since the tailored welded component adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0155] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0156] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0157] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0158] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for manufacturing tailor-welded components, characterized in that: The method for manufacturing tailor-welded components comprises: Combining and blanking each splicing segment (10) respectively to obtain a unit combination blanking plate (20) for each splicing segment (10), wherein the unit combination blanking plate (20) is arranged with at least two identical splicing segments (10) along the width direction; Performing pre-welding processing on the splicing ends of each unit combined blanking plate (20); Welding the spliced ​​ends of all unit assembly blanking plates (20) respectively to obtain component assembly blanking plates (30); The component assembly blank plate (30) is divided into at least two tailor-welded components (50).

2. The method for manufacturing tailor-welded components according to claim 1, characterized in that: The method of dividing the component assembly blank plate (30) into at least two tailor-welded components (50) comprises: Performing a first trimming operation on a long side (51) of each tailor-welded component (50) extending in the length direction on a component assembly blanking plate (30), wherein the first trimming operation is performed from a middle position of the long side (51) to both ends; A second trimming operation is performed on the remaining short side (52) of each tailored welded component (50) to separate the tailored welded components (50) into at least two tailored welded components (50).

3. The method for manufacturing tailor-welded components according to claim 2, characterized in that: The first trimming operation of the long side (51) of each tailor-welded component (50) arranged along the length direction on the component assembly blanking plate (30) comprises: The outer contour of the component assembly blanking plate (30) is cut to obtain a component assembly contour plate (40), wherein the component assembly contour plate (40) is arranged with at least two tailored welded components (50) along the width direction, any two adjacent tailored welded components (50) are arranged on the component assembly contour plate (40) with their long sides (51) collinearly arranged, and the outer contour of the component assembly contour plate (40) includes the contours of the two outermost long sides (51) of the at least two tailored welded components (50); A first trimming operation is performed on all long edges (51) arranged in a co-linear manner on the component assembly outline plate (40).

4. The method for manufacturing tailor-welded components according to claim 3, characterized in that: The first trimming operation is performed on all the long edges (51) of the component assembly outline plate (40) arranged in a co-linear manner, comprising: Selecting a centrally arranged long edge (51) from among all the long edges (51) arranged in a co-linear manner on the component assembly outline plate (40) and performing a first trimming operation to obtain two component segmentation plates; If there are still at least two welded components (50) arranged in the component partition plate, the first trimming operation is continued on the long edge (51) arranged in the middle of the component partition plate until only one welded component (50) is left in the arrangement.

5. The method for manufacturing tailor-welded components according to claim 2, characterized in that: Before performing the first trimming operation on the long side (51) of each tailor-welded component (50) arranged along the length direction on the component assembly blanking plate (30), the method further comprises: A hole cutting operation is performed on the component assembly blanking plate (30), wherein the hole cutting operation is performed from the middle position of the component assembly blanking plate (30) to the periphery in sequence.

6. The method for manufacturing tailor-welded components according to claim 1, characterized in that: The pre-welding processing of the spliced ​​ends of each unit combined blanking plate (20) comprises: chamfering (11) the thick plate-shaped splicing end of the two splicing ends to be welded, so that the thickness of the two splicing ends at the welding position is the same; When the thickness of the thin plate splicing end of the two splicing ends to be welded is greater than the preset groove opening thickness, a groove with a preset groove angle is opened on the chamfering (11) processing side for the two splicing ends to be welded.

7. The method for manufacturing tailor-welded components according to claim 6, characterized in that: The length of the chamfer (11) is set to be 4 to 5 times the difference in thickness between the two splicing ends; And / or, the preset groove thickness is 8 mm; And / or, the preset groove angle is 30° to 45°; And / or, the step of welding the spliced ​​ends of all the unit assembly blanking plates (20) to obtain the component assembly blanking plate (30) comprises: Plasma composite welding or laser composite welding is used to perform single-sided welding on the welding gap between the two joint ends from the chamfer (11) processing side to obtain a component combined blank plate (30) with double-sided formed welds.

8. The method for manufacturing tailor-welded components according to any one of claims 1 to 7, characterized in that: Before the component assembly blank plate (30) is divided into at least two tailor-welded components (50), the method further comprises: Performing flaw detection on the welds on the component assembly blanking plate (30); And / or, the step of separately combining and blanking each splicing section (10) to obtain a unit combined blanking plate (20) for each splicing section (10) comprises: According to the width of the raw material, a layout design is performed on a splicing section (10) with the largest blanking width requirement in a tailor-made welded component (50) to obtain a first layout size, wherein the width of the first layout size is sufficient for at least two corresponding splicing sections (10) to be laid out along the width direction; Performing layout design on the remaining splicing segments (10) in the tailor-made welded component (50) according to the layout quantity of the splicing segments (10) in the first layout size, so as to obtain second layout sizes of the remaining splicing segments (10); Cutting is performed according to the first layout size and the second layout size to obtain a unit combination blanking plate (20) for each splicing section (10).

9. The method for manufacturing tailor-welded components according to any one of claims 1 to 7, characterized in that: After the component assembly blank plate (30) is divided into at least two tailor-welded components (50), the method further comprises: A bending operation is performed on the tailor-welded component (50), wherein the bending operation uses a four-roller plate rolling device including an upper roller mechanism (61), a lower roller mechanism (62), a left roller mechanism (63) and a right roller mechanism (64), and the upper and lower positions and / or the left and right positions of the left roller mechanism (63) and / or the right roller mechanism (64) are adjustable.

10. A tailor-welded component (50), characterized in that: The tailor-welded component (50) is manufactured by using the tailor-welded component manufacturing method according to any one of claims 1 to 9.

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