Special material sheet limiting block for integrated product in tailored blank laser welding process
By designing the special piece limit block for laser welding process, the problems of sheet position staggered and the flexibility of tooling fixtures in laser welding are solved, and efficient and stable welding quality and reduced production costs are achieved.
Patent Information
- Application Number
- CN202421921704.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-08-08
AI Technical Summary
In the existing laser welding process, the positioning of linear welding without tooling leads to the staggered position of the synchronous feeding sheet, the accumulation of tolerances leads to unstable dimensional accuracy, and the design change of curved welding tooling fixtures is low, the cost is high, and the production efficiency is low.
Design a laser welding process-integrated product special piece limit block, including linear welding variable thickness door ring piece and curved welding thick door ring piece, and limit the main direction and flip direction of the welding product through the limit block to control the dimensional deviation of the welding product.
It reduces the flatness requirements of the sheet, improves welding quality and consistency, reduces production costs, and improves the flexibility of production efficiency and product design changes.
Smart Images
Figure CN223235353U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile manufacturing, in particular to a special sheet limiting block for an integrated product using a laser welding process. Background Art
[0002] In recent years, with the continuous improvement of the requirements for lightweight, safety and VAVE in the automotive manufacturing field, the one-piece laser welding product technology has been promoted and used. For example, the one-piece door ring is made by laser welding the A-pillar lower reinforcement plate, the A-pillar upper reinforcement plate, the B-pillar reinforcement plate, the door sill plate and other components and then hot stamping them. Compared with the process of hot stamping different parts separately and then spot welding them into door rings, the one-piece laser welded door ring reduces weight while reducing production costs and improving vehicle production efficiency.
[0003] Common and feasible laser integrated welding methods on the market are mainly divided into two categories according to the route form, namely linear welding and curved welding. The main problems are as follows:
[0004] ① In straight and curved laser integrated welding, in order to ensure the welding dimensional accuracy of the product, high requirements are placed on the flatness of the sheet, thereby increasing the control cost of the entire production chain;
[0005] ② Linear welding does not require tooling positioning, and it is necessary to ensure that the two welded sheets are fed into the welding area synchronously. Once the position of the sheet is misaligned during the synchronous feeding process, tolerance accumulation will occur, resulting in excessive dimensional accuracy of the final product, unstable consistency, and low pass rate.
[0006] ③ The curve welding method requires a fixture to completely fix the pieces before welding. The fixture is a special tool, which has low flexibility in product design changes, high costs, long development cycles, long production cycle intervals, and low production efficiency. Laser curve welding equipment is expensive and there are only about 10 production lines in China, resulting in insufficient production capacity. Utility Model Content
[0007] In view of the shortcomings of the existing technology, the utility model provides a special sheet limit block for an integrated product of the laser welding process, which solves the problems of no tooling positioning for straight welding and the inconvenience in the use and production of tooling fixtures for curved welding in the automobile manufacturing process.
[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a sheet stopper for a laser welding process integrated product, including a linear welding variable thickness door ring sheet and a curved welding uniform thickness door ring sheet:
[0009] The linearly welded variable thickness door ring sheet comprises a variable thickness door sill plate, a variable thickness A-pillar lower reinforcement plate, a variable thickness A-pillar upper reinforcement plate and a variable thickness B-pillar reinforcement plate;
[0010] The outer side wall of the variable thickness rocker plate is provided with a second L-shaped limit block and a second type limit block, the outer side wall of the variable thickness A-pillar lower reinforcement plate is provided with a first L-shaped limit block and a fourth L-shaped limit block, the outer side wall and inner side wall of the variable thickness A-pillar upper reinforcement plate are respectively provided with a third L-shaped limit block and a first type limit block, and the outer side wall of the variable thickness B-pillar reinforcement plate is provided with a door-shaped limit block;
[0011] The curved welded door ring material of equal thickness includes a lower section of an equal-thickness A-pillar lower reinforcement plate, a rocker plate of equal thickness, a lower section of an equal-thickness B-pillar reinforcement plate, an upper section of an equal-thickness B-pillar reinforcement plate, an upper section of an equal-thickness A-pillar reinforcement plate, and a lower section of an equal-thickness A-pillar lower reinforcement plate;
[0012] The outer side walls of the lower section of the A-pillar lower reinforcement plate of equal thickness, the rocker plate of equal thickness, the lower section of the B-pillar reinforcement plate of equal thickness, the upper section of the B-pillar reinforcement plate of equal thickness and the lower section of the A-pillar lower reinforcement plate of equal thickness are respectively provided with a first concave-convex limit block, a second concave-convex limit block, a third concave-convex limit block, a fourth concave-convex limit block and a fifth concave-convex limit block, and the outer side wall of the A-pillar upper reinforcement plate of equal thickness is provided with a third type I limit block and a fourth type I limit block.
[0013] Preferably, the seventh weld, eighth weld, ninth weld, and tenth weld are respectively welded between the variable thickness rocker panel, the variable thickness A-pillar lower reinforcement panel, the variable thickness A-pillar upper reinforcement panel, and the variable thickness B-pillar reinforcement panel. Preferably, the first weld, second weld, third weld, fourth weld, fifth weld, and sixth weld are respectively welded between the lower section of the uniform thickness A-pillar lower reinforcement panel, the uniform thickness rocker panel, the lower section of the uniform thickness B-pillar reinforcement panel, the upper section of the uniform thickness B-pillar reinforcement panel, the upper section of the uniform thickness A-pillar upper reinforcement panel, and the lower section of the uniform thickness A-pillar lower reinforcement panel.
[0014] Beneficial effects
[0015] The utility model provides a special sheet limiting block for integrated products in the laser welding process, which has the following beneficial effects: mainly through the limiting block on the main welding direction and the auxiliary limiting on the flipping direction, the dimensional deviation of the welded product is controlled to ensure stable welding quality. The limiting forms include "I" type limiting block, "L" type limiting block, "door" type limiting block and "concave-convex" type limiting block. This design has the following advantages:
[0016] ① Reduces the high flatness requirements of the sheet for straight and curved integrated laser welding, thereby reducing the control cost of the entire production chain;
[0017] ② The combination of variable thickness rolled plate and integrated laser welding technology has been achieved, further reducing the weight and cost of vehicle parts products;
[0018] ③ The application of variable thickness plates can reduce the use of patch plates and eliminate the investment costs of molds, welding, etc. related to patch plates;
[0019] ④ Improved the welding dimensional accuracy and welding quality of linear welding, reduced the tolerance accumulation leading to the final product dimensional accuracy deviation rate, and improved the consistency and stability of the product;
[0020] ⑤ The special tooling for curve welding can be transformed into general tooling, which can increase the flexibility of product design changes, reduce cost input, shorten the production cycle interval, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is an example diagram of a variable thickness door ring sheet using the linear welding method of the utility model.
[0022] Figure 2 This is an example diagram of the curved welding method of the utility model for door ring pieces of equal thickness.
[0023] In the figure: 1. Lower section of the A-pillar lower reinforcement plate with uniform thickness; 2. Sill plate with uniform thickness; 3. Lower section of the B-pillar reinforcement plate with uniform thickness; 4. Upper section of the B-pillar reinforcement plate with uniform thickness; 5. Upper A-pillar reinforcement plate with uniform thickness; 6. Middle section of the A-pillar lower reinforcement plate with uniform thickness; 7. Sill plate with variable thickness; 8. Lower A-pillar reinforcement plate with variable thickness; 9. Upper A-pillar reinforcement plate with variable thickness; 10. B-pillar reinforcement plate with variable thickness; L1, first weld; L2, second weld; L3, third weld; L4, fourth weld; L5, fifth weld; L6, sixth weld; L7, seventh weld; L8, eighth weld; L9 , the ninth weld; L10, the tenth weld; A1, the first L-shaped limit block; A2, the second L-shaped limit block; A3, the third L-shaped limit block; A4, the fourth L-shaped limit block; A5, the fifth L-shaped limit block; C1, the first concave-convex limit block; C2, the second concave-convex limit block; C3, the third concave-convex limit block; C4, the fourth concave-convex limit block; C5, the fifth concave-convex limit block; C6, the door-type limit block; B1, the first type limit block; B2, the second type limit block; B3, the third type limit block; B4, the fourth type limit block. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0025] See also Figure 1-2 The utility model provides a technical solution: a laser welding process integrated product dedicated sheet limiter, including linear welding variable thickness door ring sheet and curve welding equal thickness door ring sheet:
[0026] The linear welded variable thickness door ring sheet includes a variable thickness threshold plate 7, a variable thickness A-pillar lower reinforcement plate 8, a variable thickness A-pillar upper reinforcement plate 9 and a variable thickness B-pillar reinforcement plate 10; the above components are welded end to end in sequence to form an annular sheet structure; the four types of plates are firstly rolled to obtain variable thickness coils, and then stamped or laser cut to obtain variable thickness special-shaped sheets; the "L"-shaped limit mechanisms of A7, A8, A9 and A10 are used to limit the freedom of the sheets on both sides in three directions; finally, the welded variable thickness threshold plate 2. The sub-assembly plates of the variable-thickness A-pillar lower reinforcement plate, 3. The variable-thickness A-pillar upper reinforcement plate, and 4. the variable-thickness B-pillar reinforcement plate are welded together in a straight line to form welds L9 and L10. During the welding process, the "I"-type limiting mechanisms of B1 and B2 are used to limit the freedom of the sheets on both sides in a single direction. Since one end of the variable-thickness B-pillar reinforcement plate cannot be provided with a limiting mechanism and is in a free state, the four-directional freedom degrees of the sheet are limited by the patented C6 "door"-type limiting mechanism of the present invention. Finally, a variable-thickness integrated door ring sheet that meets the size requirements and welding quality requirements is obtained;
[0027] The outer side wall of the variable thickness rocker plate 7 is provided with a second L-shaped limit block A2 and a second first-type limit block B2, the outer side wall of the variable thickness A-pillar lower reinforcement plate 8 is provided with a first L-shaped limit block A1 and a fourth L-shaped limit block A4, the outer side wall and inner side wall of the variable thickness A-pillar upper reinforcement plate 9 are respectively provided with a third L-shaped limit block A3 and a first first-type limit block B1, and the outer side wall of the variable thickness B-pillar reinforcement plate 10 is provided with a door-shaped limit block C6;
[0028] The curved welded equal-thickness door ring material comprises an equal-thickness A-pillar lower reinforcement plate lower section 1, an equal-thickness threshold plate 2, an equal-thickness B-pillar reinforcement plate lower section 3, an equal-thickness B-pillar reinforcement plate upper section 4, an equal-thickness A-pillar upper reinforcement plate 5 and an equal-thickness A-pillar lower reinforcement plate middle section 6; the above components are welded end to end in sequence to form an annular material structure; first, the material is assembled by tooling, and during the assembly process, the degree of freedom of the material weld seam is gradually restricted by the "concave-convex" type limiting mechanisms C1, C2, C3, C4, and C5 and the "single" type limiting mechanisms B1 and B2, so as to realize the assembly positioning of the entire door ring, and then the welds L1, L4, L6 and L2, L3, and L5 are formed in sequence by laser curved welding, and finally an equal-thickness integrated door ring material that meets the size requirements and welding quality requirements is obtained;
[0029] The outer sides of the lower section 1 of the A-pillar lower reinforcement plate of equal thickness, the rocker plate of equal thickness 2, the lower section 3 of the B-pillar reinforcement plate of equal thickness, the upper section 4 of the B-pillar reinforcement plate of equal thickness and the middle section 6 of the A-pillar lower reinforcement plate of equal thickness are respectively provided with a first concave-convex limit block C1, a second concave-convex limit block C2, a third concave-convex limit block C3, a fourth concave-convex limit block C4 and a fifth concave-convex limit block C5, and the outer side wall of the A-pillar upper reinforcement plate of equal thickness 5 is provided with a third type I limit block B3 and a fourth type I limit block B4.
[0030] Furthermore, a seventh weld L7, an eighth weld L8, a ninth weld L9 and a tenth weld L10 are respectively welded between the variable thickness rocker plate 7, the variable thickness A-pillar lower reinforcement plate 8, the variable thickness A-pillar upper reinforcement plate 9 and the variable thickness B-pillar reinforcement plate 10.
[0031] Furthermore, the first weld L1, the second weld L2, the third weld L3, the fourth weld L4, the fifth weld L5 and the sixth weld L6 are respectively welded between the lower section 1 of the equal-thickness A-pillar lower reinforcement plate, the rocker plate 2 of the equal-thickness, the lower section 3 of the equal-thickness B-pillar reinforcement plate, the upper section 4 of the equal-thickness B-pillar reinforcement plate, the upper reinforcement plate 5 of the equal-thickness A-pillar and the middle section 6 of the equal-thickness A-pillar lower reinforcement plate.
[0032] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process.
[0033] Embodiment: During the welding process, the parallel direction of the weld is controlled by the "L"-shaped limit blocks A1, A2, A3, and A4 to ensure the synchronization of the sheets on both sides, and the vertical direction of the weld is limited and the sheet material near the weld is flipped to ensure that the gap between the two sheets is stable and consistent; the "I"-shaped limit blocks B1 and B2 are used to ensure the synchronization of the sheets on both sides. One end of the variable thickness B-pillar reinforcement plate is in a free state and no limit block can be arranged. The "door"-shaped limit block C6 is used to ensure synchronization while assisting in controlling its up and down flipping and left and right movement, and finally a variable thickness integrated door ring sheet that meets the size requirements and welding quality requirements is obtained.
[0034] During the assembly process, the "concave and convex" type limit block C1 of the present invention is used to limit the displacement and rotation of the lower section of the A-pillar lower reinforcement plate of the equal thickness of the sheet material parallel to and perpendicular to the direction of the two welds, and to assist in limiting the flipping of the sheet material, so that the A-pillar lower reinforcement plate of the equal thickness of the sheet material is defined as the main reference to determine the position of the welds L1 and L2, and the "concave and convex" type limit blocks C2, C3, C4, and C5 of the present invention are used to limit the positions of the welds L3, L4, L5, and L6 step by step, while ensuring the position accuracy of the threshold plate of the equal thickness, the lower section of the B-pillar reinforcement plate of the equal thickness, the upper section of the B-pillar reinforcement plate of the equal thickness, and the A-pillar lower reinforcement plate of the equal thickness. Finally, the A-pillar upper reinforcement plate of the equal thickness of the sheet material is limited by the welds L5, L6 and the "one" type limit blocks B1 and B2, so as to obtain an integrated door ring sheet with stable dimensional accuracy in the assembled state, and finally, through laser welding, an integrated door ring sheet of equal thickness that meets the dimensional requirements and welding quality requirements is obtained.
[0035] Conventional laser straight welding processes ensure that the two sheets advance synchronously, but the sheets remain relatively free. In particular, unstable flatness can cause the sheets to flip and shift during transport. Therefore, to ensure weld quality, high sheet flatness requirements are imposed. The patented limiter in this invention not only ensures synchronization in laser straight welding but also further limits the sheet's freedom, preventing flipping and shifting during transport. This reduces sheet flatness requirements, improves weld quality, and improves the dimensional accuracy of the door ring assembly sheet, increasing product qualification rates by over 20%.
[0036] The door ring, manufactured using rolled variable thickness plates and laser linear welding, achieves a perfect combination of variable thickness sheets and laser linear welding. Customized rolling can be performed for each uniform thickness zone, eliminating the need for patch plates and reinforcement plate brackets. The weight of the door ring and rear floor integrated frame can be reduced by 6-20%.
[0037] Common laser curve welding pieces are assembled by special tooling and then transferred to the welding area by suction by a robot. If the flatness is unstable or out of tolerance, the robot will deviate during the transfer of the piece, so the flatness of the piece is required to be high. The application of the patented limit block of the present invention can realize the universalization of laser curve welding tooling, which can be moved to the welding area in the form of a conveyor line and the robot can be eliminated, avoiding defective products due to flatness problems during the transfer process of the robot. It saves the secondary development cost of the tooling and the investment in the robot, eliminates the transfer process of the robot, shortens the production cycle and improves the product qualification rate, and at the same time releases the change requirements on the design side without any cost investment.
[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations. The phrase "includes an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.
[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A special sheet stopper for integrated laser welding products, including linear welding variable thickness door ring sheets and curved welding uniform thickness door ring sheets, characterized by: The linearly welded variable thickness door ring material sheet comprises a variable thickness threshold plate (7), a variable thickness A-pillar lower reinforcement plate (8), a variable thickness A-pillar upper reinforcement plate (9) and a variable thickness B-pillar reinforcement plate (10); The outer side wall of the variable thickness threshold plate (7) is provided with a second L-shaped limit block (A2) and a second first-shaped limit block (B2); the outer side wall of the variable thickness A-pillar lower reinforcement plate (8) is provided with a first L-shaped limit block (A1) and a fourth L-shaped limit block (A4); the outer side wall and inner side wall of the variable thickness A-pillar upper reinforcement plate (9) are respectively provided with a third L-shaped limit block (A3) and a first first-shaped limit block (B1); and the outer side wall of the variable thickness B-pillar reinforcement plate (10) is provided with a door-shaped limit block (C6); The curved welded equal-thickness door ring material comprises an equal-thickness lower section of an A-pillar lower reinforcement plate (1), an equal-thickness door sill plate (2), an equal-thickness lower section of a B-pillar reinforcement plate (3), an equal-thickness upper section of a B-pillar reinforcement plate (4), an equal-thickness upper A-pillar reinforcement plate (5), and an equal-thickness lower A-pillar reinforcement plate middle section (6); The outer side walls of the lower section (1) of the A-pillar lower reinforcement plate of equal thickness, the threshold plate (2) of equal thickness, the lower section (3) of the B-pillar reinforcement plate of equal thickness, the upper section (4) of the B-pillar reinforcement plate of equal thickness and the middle section (6) of the A-pillar lower reinforcement plate of equal thickness are respectively provided with a first concave-convex limiting block (C1), a second concave-convex limiting block (C2), a third concave-convex limiting block (C3), a fourth concave-convex limiting block (C4) and a fifth concave-convex limiting block (C5); the outer side wall of the A-pillar upper reinforcement plate of equal thickness (5) is provided with a third type limiting block (B3) and a fourth type limiting block (B4).
2. The sheet limiting block for laser welding integrated products according to claim 1, characterized in that: A seventh weld (L7), an eighth weld (L8), a ninth weld (L9) and a tenth weld (L10) are respectively welded between the variable thickness rocker plate (7), the variable thickness A-pillar lower reinforcement plate (8), the variable thickness A-pillar upper reinforcement plate (9) and the variable thickness B-pillar reinforcement plate (10).
3. The sheet limiting block for laser welding integrated products according to claim 1, characterized in that: A first weld (L1), a second weld (L2), a third weld (L3), a fourth weld (L4), a fifth weld (L5) and a sixth weld (L6) are respectively welded between the lower section (1) of the A-pillar lower reinforcement plate of equal thickness, the rocker plate (2) of equal thickness, the lower section (3) of the B-pillar reinforcement plate of equal thickness, the upper section (4) of the B-pillar reinforcement plate of equal thickness, the upper reinforcement plate (5) of equal thickness and the middle section (6) of the A-pillar lower reinforcement plate of equal thickness.