Magnetic pulse welding device based on welding area maximization

Abstract

The utility model belongs to the technical field of electromagnetic pulse welding, and particularly relates to a magnetic pulse welding device based on welding area maximization, a coil is arranged in a base, one surface of the base is used for arranging a flying plate and a supporting block and is provided with a through groove, and the working surface of a welding working area is in a concave arc shape and is arranged towards the through groove; the supporting block is used for supporting a workpiece with curvature, and the fixing structure is used for fixing the flying plate and the workpiece with curvature; during welding, the generatrix of the to-be-welded area of the workpiece with the curvature is parallel to the generatrix of the working face of the welding working area, and the to-be-welded area of the workpiece with the curvature coincides with the working face of the welding working area in the projection direction from the workpiece with the curvature to the welding working area. According to the utility model, the collision point position and the collision angle of the flying plate and the workpiece with curvature can be improved, the effective connection area of the welding area of the flying plate and the workpiece with curvature is increased, the excessive melting of an interface is avoided, and the strength of a welding joint is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electromagnetic pulse welding, and particularly relates to a magnetic pulse welding device based on maximization of welding area. BACKGROUND

[0002] Electromagnetic pulse welding is a high-speed solid-phase connection technology based on electromagnetic mechanics principles, and welding is realized through high-speed collision of metal workpieces driven by instantaneous strong magnetic field force. Unlike traditional fusion welding, the process is free of melting and heat-affected zone, and is particularly suitable for dissimilar metal connection, and is a leading technology in the fields of aerospace, automobile lightweighting and the like. However, the welding area of electromagnetic pulse welding is not completely effective, and generally only the elliptical circumference of the connection is an effective area, especially for electromagnetic pulse welding between a plate body (flying plate) and a workpiece with curvature, the effective connection area formed after welding is even smaller, and the welding strength is limited. If the welding energy is increased, the effective connection area can be increased to a certain extent, but interface overmelting is prone to occur, leading to brittle welding joints and reduced strength and toughness. SUMMARY

[0003] The utility model solves the technical problem of providing a magnetic pulse welding device based on maximization of welding area, aiming to improve the collision point position and collision angle of a flying plate and a workpiece with curvature, increase the effective connection area of the welding area of the flying plate and the workpiece with curvature, and avoid interface overmelting, thereby effectively improving the strength of the welding joint.

[0004] The utility model relates to a base, a coil, a support block and a fixing structure, the coil is arranged inside the base, one side of the base is used for arranging the flying plate and the support block, and a through groove is arranged at the position of the welding work area of the coil corresponding to the coil on the side of the base, the working surface of the welding work area is recessed and arc-shaped and is arranged towards the through groove, the support block is used for supporting the workpiece with curvature, so that a gap is formed between the workpiece with curvature and the flying plate, and the fixing structure is used for fixing the flying plate and the workpiece with curvature, when welding, the generatrix of the workpiece with curvature to be welded is parallel to the generatrix of the working surface of the welding work area, and the projection direction of the workpiece with curvature to be welded to the welding work area is downward, and the workpiece with curvature to be welded is coincident with the working surface of the welding work area.

[0005] Further, the curvature of the working surface of the welding work area is the same as the curvature of the workpiece with curvature to be welded.

[0006] Further, the utility model further includes an insulating plate, the insulating plate is arranged on the side of the base with the through groove and covers the through groove, and the base is arranged with the flying plate and the support block on the side with the through groove through the insulating plate.

[0007] Further, the fixing structure includes a pressing block, and the pressing block is used for fixing the workpiece with curvature during welding.

[0008] Further, one side of the pressing block is provided with a limiting groove, when welding, the side of the pressing block provided with the limiting groove faces the workpiece with curvature, and the workpiece with curvature is fixed through the limiting groove.

[0009] Further, a plurality of screw rods are arranged on the base, a plurality of through holes one are arranged on the pressing block and the number of the through holes one is same to that of the screw rods, after the pressing block is arranged on the plurality of screw rods through the through holes one, the position of the pressing block in the axial direction of the screw rods is limited by the nut.

[0010] Further, the fixing structure further comprises a pressing plate, which is used for fixing the flying plate during welding.

[0011] Further, the fixing structure further comprises a cushion block, which is used for pressing and fixing the pressing plate.

[0012] Further, when the plurality of screw rods are arranged on the base, a plurality of through holes two are arranged on the pressing plate and the cushion block is arranged below the pressing block and presses the pressing plate under the action of the pressing block.

[0013] Further, the supporting block has two, which are used for supporting two ends of the workpiece with curvature.

[0014] The beneficial effects of the utility model are that when welding, under the condition that the welding energy is same, the electromagnetic force generated in the welding work area of the coil can provide a larger deformation space for the flying plate, the flying plate generates a deformation more suitable for the curvature of the workpiece with curvature, the position and angle of the collision point of the flying plate and the workpiece with curvature are improved, when the flying plate and the workpiece with curvature collide at high speed, a more ideal collision angle can be formed, two collision areas can be formed, thereby without increasing the welding energy, the effective connection area of the welding area of the flying plate and the workpiece with curvature is increased, the effective connection area is maximized as far as possible in the limited welding area, the problem of excessive melting of the interface is avoided, the welding joint strength is effectively improved, and the application of the electromagnetic pulse welding between the flying plate and the workpiece with curvature is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the utility model based on the welding area maximization magnetic pulse welding device.

[0016] Figure 2 It is a longitudinal section schematic view of the utility model based on the welding area maximization magnetic pulse welding device.

[0017] Figure 3 It is the A place enlarged view in the utility model. Figure 2

[0018] Figure 4 It is the perspective structure view of the base of the utility model.​

[0019] Figure 5 It is the structure schematic view of the coil of the utility model.

[0020] Figure 6 It is the structure schematic view of the welding work area of prior art coil.

[0021] Figure 7 It is the schematic view when prior art flying plate and curvature workpiece start to collide.

[0022] Figure 8 It is the schematic view when flying plate and curvature workpiece of the utility model start to collide.

[0023] In the drawing: 1, base; 11, through slot; 2, coil; 21, welding work area; 3, insulating plate; 4, support block; 5, pressing block; 51, limiting slot; 6, pressing plate; 7, cushion block; 8, screw rod; 100, flying plate; 200, curvature workpiece. DETAILED DESCRIPTION

[0024] As Figures 1-8 shown, the utility model provides a kind of magnetic pulse welding device based on welding area maximization, including base 1, coil 2, support block 4 and fixed structure.The inside of base 1 is provided with mounting groove, and coil 2 is arranged in mounting groove.Base 1 is used to arrange the one side of flying plate 100 and support block 4 is provided with the through slot 11 being communicated with mounting groove, and the position of this through slot 11 corresponds with the position of the welding work area 21 of coil 2. Wherein, welding work area 21 is the working part of coil 2 participating in welding, as Figure 5 Shown, the width of welding work area 21 is less than the width of other regions of coil 2, and current enters coil 2 along the direction of arrow, and after welding work area 21, it flows out along the direction of arrow at the other end of coil 2, and when passing through welding work area 21, it generates larger instantaneous current.The working surface of welding work area 21 is recessed arc, i.e. the working surface is recessed arc surface, and the working surface is towards the through slot 11 setting.Base 1 can provide mounting space and protection for coil 2, and the setting of through slot 11 can guarantee that the magnetic field formed can be effectively acted on flying plate 100.

[0025] The support block 4 is used to support the curved workpiece 200, so that a gap is formed between the curved workpiece 200 to be welded and the flying plate 100, and the gap is specifically the distance between the flying plate 100 and the tangent line of the lowest point of the curved workpiece 200 to be welded, and is preferably 0.5-2mm. The fixing structure is used to fix the flying plate 100 and the curved workpiece 200, so as to keep the relative positions of the two at the beginning of welding. When welding, the generatrix of the curved workpiece 200 to be welded is parallel to the generatrix of the working surface of the welding working area 21, that is, the length direction of the generatrix of the curved workpiece 200 to be welded is the same as the length direction of the generatrix of the working surface of the welding working area 21, and along the projection direction of the curved workpiece 200 to the welding working area 21, the curved workpiece 200 to be welded is coincident with the working surface of the welding working area 21, that is, the curved workpiece 200 to be welded is coincident with the working surface of the welding working area 21 in the projection view angle of the vertical direction of the curved workpiece 200 to be welded. Wherein, the curved workpiece 200 is specifically a pipe body, a rod body, or a plate member with a curved arc (such as a U-shaped plate member). Figure 2

[0026] Figure 7 It is a schematic view of the collision between the flying plate 100 and the curved workpiece when the conventional coil is used for welding. The working surface of the welding working area 21 of the coil 2 is designed as a concave arc, and when welding, under the condition of the same welding energy, compared with the planar welding working area 21, the electromagnetic force generated by the welding working area 21 of the utility model can provide a larger deformation space for the flying plate 100, so that the flying plate 100 generates a deformation more suitable for the curvature of the curved workpiece 200, the position and angle of the collision between the flying plate 100 and the curved workpiece 200 are improved, and when the flying plate 100 and the curved workpiece 200 collide at a high speed, a more ideal collision angle can be formed, and two collision areas as shown in the figure can be formed, so that the effective connection area of the welding area of the flying plate 100 and the curved workpiece 200 is increased without increasing the welding energy, the maximization of the effective connection area in the limited welding area is realized as much as possible, the problem of excessive melting of the interface is avoided, the welding joint strength is effectively improved, and the application of electromagnetic pulse welding between the flying plate 100 and the curved workpiece 200 is facilitated. Figure 8 The θ in the figure is the collision angle. Figure 8

[0027] Preferably, the curvature of the working surface of the welding working area 21 is the same as the curvature of the curved workpiece 200 to be welded. In order to further optimize the magnetic field force distribution and the driving effect on the flying plate 100, and further improve the collision angle and the contact area.

[0028] ​​The utility model also includes insulating board 3, insulating board 3 sets up in the one side of base 1 with through slot 11 and covers through slot 11, the one side of base 1 specific through slot 11 is arranged flying plate 100 and support block 4 through insulating board 3. The insulating board 3 can form insulating medium layer between flying plate 100 and the welding work area 21 of coil 2, to prevent arc breakdown and other problems. The thickness of the insulating board 3 is not more than 1mm, and the length and width dimensions are set to be able to completely cover the through slot 11, and further preferably the size of the insulating board 3 is greater than the size of the flying plate 100, and the insulating board 3 can be directly placed on the base 1 for use, or fixed on the base 1 by a fixing member. In other embodiments, an insulating packaging layer can be provided outside the coil 2 to prevent arc breakdown.

[0029] The fixing structure includes a pressing block 5 for fixing the workpiece with curvature 200 during welding. Based on this arrangement, displacement of the workpiece with curvature 200 during welding can be avoided, ensuring the accuracy of the welding position and improving the welding quality and consistency.

[0030] In an embodiment of the utility model, the workpiece with curvature is directly pressed by the pressing block 5. In a preferred embodiment of the utility model, one side of the pressing block 5 is provided with a limiting groove 51. During welding, the side of the pressing block 5 provided with the limiting groove 51 is arranged to face the workpiece with curvature 200, and the workpiece with curvature 200 is fixed by the limiting groove 51. Specifically, as shown in Figure 1 and Figure 2 During welding, the pressing plate 6 is located above the workpiece with curvature 200, and part of the workpiece with curvature 200 is located in the limiting groove 51, so that the position of the workpiece with curvature 200 is fixed by the pressing block 5 and the limiting groove 51. Based on this preferred embodiment, the positioning and fixing effect of the workpiece with curvature 200 can be further enhanced, and the rolling of the workpiece with curvature 200 is prevented. By arranging the limiting groove 51 on the pressing block 5 corresponding to the position of the installation groove in advance, when the workpiece with curvature 200 is fixed by the limiting groove 51, the to-be-welded area of the workpiece with curvature can be kept coinciding with the working surface of the welding work area 21 in the projection direction from the workpiece with curvature 200 to the welding work area 21.

[0031] A plurality of screw rods 8 are arranged on the base 1, and a plurality of through holes one are arranged on the pressing block 5 for the screw rods 8 to pass through, and the number of the through holes one is the same as that of the screw rods 8. The pressing block 5 can be sleeved on the plurality of screw rods 8 through the through holes one, that is, Figure 1 and Figure 2The utility model discloses a plurality of nuts, the compression block 5 is set on the plurality of screw rods 8 through the through hole, and the nut is threadedly connected to the upper end of the screw rod 8, so that the compression block 5 is limited in the axial position of the screw rod 8 by the locking of the nut and a certain pre-tightening force is applied to the compression block 5, thereby limiting the lateral position of the compression block 5, realizing the quick and accurate alignment and installation of the compression block 5 and the base 1, and improving the assembly efficiency of the device and the stability during welding.

[0032] The fixing structure further comprises a pressing plate 6, which is used for fixing the flying plate 100 during welding to prevent deviation or flying out under the action of electromagnetic force, and ensures the stability and safety of the welding process.

[0033] The fixing structure further comprises a cushion block 7, which is used for pressing and fixing the pressing plate 6 during welding to maintain the position of the pressing plate 6 and enhance the pressing force of the pressing plate 6 on the flying plate 100, prevent the pressing plate 6 from loosening under high pressure impact, and improve the reliability of the welding process.

[0034] Preferably, the pressing plate 6 has two, which are used for corresponding fixing the two sides of the flying plate 100. Based on this setting, the stress of the flying plate 100 during fixing can be more uniform without affecting the interference of the to-be-welded area of the flying plate 100, further guaranteeing the fixing effect and welding quality of the flying plate 100.

[0035] When the base 1 is provided with a plurality of screw rods 8, the two pressing plates 6 are provided with through holes two through which the screw rods 8 can pass, and the pressing plates 6 can be laterally limited by the cooperation of the screw rods 8 and the through holes two. During welding, the two cushion blocks 7 are located below the compression block 5, and the two cushion blocks 7 are used for supporting the compression block 5 and pressing the two pressing plates 6 correspondingly under the action of the compression block 5, that is, when the compression block 5 fixes the workpiece 200 with curvature, the two ends of the compression block 5 are supported by the corresponding cushion blocks 7, and the two cushion blocks 7 effectively press the pressing plates 6 under the action of the compression block 5. This setting mode realizes the stable pressing of the multi-layer structure in combination with the synergistic effect of the cushion block 7 and the compression block 5, can reduce the overall disassembly and assembly difficulty of the device and improve the overall structural stability and reliability.

[0036] The number of screw rods 8 is four, and the two pressing plates 6 are each provided with two through holes two, which facilitates the positioning of the posture of the pressing plate 6 during assembly. In order to facilitate the installation of the coil 2, the base 1 can include upper and lower parts, and the upper and lower parts are fixed by fasteners such as bolts, and the installation groove is located between the upper and lower parts.

[0037] The support block 4 has two, for corresponding support belt curvature workpiece 200 both ends, help to guarantee the stable posture of belt curvature workpiece 200 in the welding process.The utility model discloses, support block 4 is placed directly on insulating plate 3, and insulating plate 3 can adopt transparent material, to facilitate operator to judge the location of welding work area 21, or the indication area for placing support block 4 is set in advance on insulating plate 3.Flying plate 100 is placed on insulating plate 3 and is fixed by pressing plate 6, when two support blocks 4 are placed on insulating plate 3, flying plate 100 is located between two cushion blocks 7.

[0038] Those skilled in the art should understand: the discussion of the above any embodiment is only exemplary, and is not intended to imply that the protection scope of the present application is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of one or more embodiments of the present application as described above, which are not provided in details for brevity.

[0039] One or more embodiments of the present application are intended to cover all such alternatives, modifications and variations falling within the broad scope of the present application. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A magnetic pulse welding device based on maximizing the welding area, characterized in that, The system includes a base (1), a coil (2), a support block (4), and a fixing structure. The coil (2) is located inside the base (1). One side of the base (1) is used to arrange the fly plate (100) and the support block (4). A through groove (11) is provided on this side of the base (1) corresponding to the welding working area (21) of the coil (2). The working surface of the welding working area (21) is concave and arc-shaped, facing the through groove (11). The support block (4) is used to support the workpiece (200) with curvature. A gap is formed between the area to be welded of the workpiece with curvature (200) and the fly plate (100). The fixing structure is used to fix the fly plate (100) and the workpiece with curvature (200). When welding, the generatrix of the area to be welded of the workpiece with curvature (200) is parallel to the generatrix of the working surface of the welding work area (21), and along the projection direction from the workpiece with curvature (200) to the welding work area (21), the area to be welded of the workpiece with curvature (200) coincides with the working surface of the welding work area (21).

2. The magnetic pulse welding device based on maximizing welding area as described in claim 1, characterized in that, The curvature of the working surface of the welding work area (21) is the same as the curvature of the area to be welded of the workpiece (200) with curvature.

3. The magnetic pulse welding device based on maximizing welding area as described in claim 1, characterized in that, It also includes an insulating plate (3), which is disposed on the side of the base (1) having a through groove (11) and covers the through groove (11). The side of the base (1) with the through groove (11) is provided with a fly plate (100) and a support block (4) through the insulating plate (3).

4. The magnetic pulse welding device based on maximizing welding area as described in claim 1, characterized in that, The fixing structure includes a pressure block (5) for fixing a workpiece (200) with curvature during welding.

5. The magnetic pulse welding apparatus based on maximizing welding area as described in claim 4, characterized in that, One side of the pressure block (5) is provided with a limiting groove (51). When welding, the side of the pressure block (5) with the limiting groove (51) is set towards the workpiece (200) with curvature, and the workpiece (200) with curvature is fixed by the limiting groove (51).

6. The magnetic pulse welding apparatus based on maximizing welding area as described in claim 5, characterized in that, The base (1) is provided with several screws (8), and the pressure block (5) is provided with a through hole for the screws (8) to pass through. The number of through holes is the same as the number of screws (8). After the pressure block (5) is set on the screws (8) through the through hole, the position of the pressure block (5) in the axial direction of the screws (8) is restricted by the nut.

7. The magnetic pulse welding apparatus based on maximizing welding area as described in any one of claims 4-6, characterized in that, The fixing structure also includes a pressure plate (6) for fixing the fly plate (100) during welding.

8. The magnetic pulse welding apparatus based on maximizing welding area as described in claim 7, characterized in that, The fixing structure also includes a pad (7) for pressing and fixing the pressure plate (6).

9. The magnetic pulse welding apparatus based on maximizing welding area as described in claim 8, characterized in that, When the base (1) is provided with several screws (8), the pressure plate (6) is provided with a through hole for the screws (8) to pass through. The pad (7) is used to be placed below the pressure block (5) and presses down the pressure plate (6) under the action of the pressure block (5).

10. The magnetic pulse welding apparatus based on maximizing welding area as described in any one of claims 1-6, characterized in that, The support block (4) has two parts, which are used to support the two ends of the workpiece (200) with curvature.

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