Electromagnetic pulse welding process structure with doubled efficiency

Abstract

The utility model relates to an electromagnetic pulse welding process structure with doubled efficiency, which belongs to the technical field of welding devices and comprises a busbar and a coil module. The coil module comprises a coil assembly and a coil welding strip; the coil assembly comprises a positive coil and a negative coil; the positive coil is connected with the negative coil through a coil welding strip; the free ends of the positive coil and the negative coil are arranged at intervals according to a preset interval; the busbar is respectively connected with the free ends of the positive coil and the negative coil; the coil welding strip is pressed above the position between one moving workpiece and one or more static workpieces on the welding jig; the coil welding strip generates a magnetic field through high-voltage current conveyed by the busbar, the moving workpiece generates current under the action of the magnetic field, the magnetic field is generated, the moving workpiece instantly collides with the static workpiece under the action of electromagnetic repulsive force, and welding is completed. According to the utility model, aluminum-aluminum, aluminum-copper, aluminum-steel and other narrow-width dissimilar metal plates of a plurality of workpieces can be simultaneously welded by one workpiece, and the welding efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of welding devices, in particular to an electromagnetic pulse welding process structure with doubled efficiency. Background Technique

[0002] Electromagnetic pulse welding is a solid-state welding process that uses magnetic force to weld two workpieces together. Among the two workpieces, the plate close to the coil is the moving workpiece, and the other is the stationary workpiece, and one moving workpiece corresponds to one stationary workpiece.

[0003] However, electromagnetic pulse welding generates reverse induced current on adjacent workpieces through the pulsed current on the coil, so repulsive force will be generated between the two. Since the coil is fixed, the workpiece will move at high speed under the action of the repulsive force, and its moving speed determines the welding speed and welding quality. And the moving speed is related to the electromagnetic force, and the electromagnetic force is related to the current intensity. Therefore, when the pulsed current is determined, by increasing the width of the aluminum plate part, the induced area of the workpiece can be increased, the total amount of induced current can be increased, the welding speed can be increased, and the welding quality can be optimized. However, the existing welding cannot weld workpieces with narrow widths under the same energy, the welding effect is poor, and the efficiency is low. Content of the Utility Model

[0004] To solve the problems existing in the above-mentioned prior art, the utility model provides an electromagnetic pulse welding process structure with doubled efficiency, which optimizes and improves the welding process structure, and can realize the welding of narrow-width dissimilar metal plates such as aluminum-aluminum, aluminum-copper, and aluminum-steel with multiple workpieces to be welded by one workpiece at the same time, and has high welding efficiency.

[0005] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0006] An electromagnetic pulse welding process structure with doubled efficiency, the electromagnetic pulse welding process structure includes a bus bar and a coil module;

[0007] The coil module includes a coil assembly and a coil welding bar; the coil assembly includes a positive coil and a negative coil; the positive coil is connected to the negative coil through the coil welding bar; the free ends of the positive coil and the negative coil are arranged at a predetermined interval; the bus bar is respectively connected to the free ends of the positive coil and the negative coil;

[0008] The coil welding bar is pressed above one moving workpiece and one or more stationary workpieces on the welding fixture; the coil welding bar generates a magnetic field through the high-voltage current transmitted by the bus bar, the moving workpiece generates current under the action of the magnetic field, and generates a magnetic field, and the moving workpiece instantaneously collides with the stationary workpiece under the action of electromagnetic repulsive force to complete welding.

[0009] Further, a busbar groove is formed in the middle of the coil welding bar, and the coil welding bars with different lengths of the busbar groove are used to weld work-piece modules with different widths between the positive coil and the negative coil.

[0010] Further, connecting clamping grooves are respectively arranged at the connecting ends of the positive coil and the negative coil and the coil welding bar, and two ends of the coil welding bar are respectively embedded into the connecting clamping grooves for fixation.

[0011] Further, semi-circular structures are respectively formed inside the connecting ends of the positive coil and the negative coil, serving as smooth transition connecting sections for the connection between the positive coil and the negative coil and the connecting clamping grooves.

[0012] Further, the overall coil assembly is a bent circuit board structure with positive and negative poles distributed at intervals.

[0013] Further, the positive coil is an L-shaped flat plate structure, and the negative coil is a rectangular flat plate structure; the positive end of the positive coil and the negative end of the negative coil are arranged vertically at intervals.

[0014] Further, the coil module further includes a welding bar presser and an insulating housing; the coil assembly and the coil welding bar are installed in the insulating housing; two presser through holes are formed in the insulating housing; and the two welding bar pressers respectively press the coil welding bar on a welding jig in the presser through holes.

[0015] Further, the busbar includes a cable, a positive busbar module and a negative busbar module; the positive busbar module and the negative busbar module are respectively installed at the free ends of the positive coil and the negative coil; and the two cables are respectively and sequentially connected to the negative busbar module and the positive busbar module.

[0016] Further, the positive busbar module and the negative busbar module have the same structure and both include a busbar pressing part and a busbar base; the two cables are respectively symmetrically crimped to the left and right sides of the busbar base through the busbar pressing part.

[0017] Further, first arc grooves are symmetrically arranged on the left and right sides of the busbar base, a second arc groove matched with the first arc groove is arranged on one side surface of the busbar pressing part, and the first arc groove and the second arc groove form a circular groove for accommodating the cable.

[0018] Advantages of the utility model:

[0019] The electromagnetic pulse welding process structure of the present utility model realizes an increase in the width of the moving workpiece by improving the structure of the coil module, completing the welding of one moving workpiece and multiple stationary workpieces. After welding, multiple welded parts can be obtained through cutting, that is, the effect of obtaining multiple welded parts by one pulse discharge is achieved. Compared with the effect of obtaining one welded part at a time in the prior art, the welding efficiency can be doubled, and the system loss of the electromagnetic pulse equipment is reduced.

[0020] The present utility model can enhance the induction area of workpieces with small width by using coil welding strips with different lengths of busbars, so as to realize the welding of dissimilar metals with narrower widths using lower energy, improve the energy utilization rate and the versatility of the electromagnetic pulse welding process structure, and solve the technical problem of high-energy welding required for welding narrow-width workpieces. Moreover, the coil welding strips with different lengths of busbars can replace the workpiece modules with different widths to realize welded parts with different widths and quantities, greatly improving the production efficiency.

[0021] The coil module of the present utility model adopts a bent circuit board structure, and at both ends of the coil welding strip, the positive coil and the negative coil respectively achieve a smooth transition through a semi-circular structure, reducing the energy loss of the current. The coil welding strip is conveniently installed through the connection slots of the positive coil and the negative coil, which can reduce the time required for replacing the coil welding strip and is beneficial to improving the welding work efficiency. Description of the Drawings

[0022] Figure 1 It is an overall schematic diagram of the electromagnetic pulse welding process structure with doubled efficiency of the present utility model;

[0023] Figure 2 It is a schematic diagram of the busbar and the coil assembly in the present utility model;

[0024] Figure 3 It is an exploded schematic diagram of the electromagnetic pulse welding process structure with doubled efficiency of the present utility model;

[0025] Figure 4 It is a schematic diagram of the structure of the coil welding strip in the present utility model;

[0026] Figure 5 It is a schematic diagram of the structure of the welded part in the present utility model.

[0027] Wherein: 1 - busbar, 110 - cable, 120 - positive busbar module, 121 - busbar pressing part, 122 - busbar base, 130 - negative busbar module, 2 - coil module, 210 - coil assembly, 211 - positive coil, 212 - negative coil, 213 - connection card slot, 214 - semi-circular structure, 220 - welding strip press, 230 - coil welding strip, 231 - busbar groove, 240 - insulating housing, 241 - base through-hole, 242 - press through-hole, 3 - welding jig, 4 - workpiece module, 401 - moving workpiece, 402 - stationary workpiece, 410 - first welding piece, 420 - second welding piece. Detailed implementation manner

[0028] In order to enable those skilled in the art to better understand the technical solution of the present application, the following will further describe the present utility model in detail with reference to the accompanying drawings and embodiments.

[0029] The orientation terms such as up, down, left, right, front and back in this application document are established based on the positional relationship shown in the drawings. If the drawings are different, the corresponding positional relationship may also change accordingly. Therefore, it cannot be understood as a limitation of the protection scope.

[0030] In the present utility model, the terms "installation", "connection", "joining", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection or a connection capable of mutual communication, a direct connection, an indirect connection through an intermediate medium, a connection inside two components, or an interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] This embodiment records an electromagnetic pulse welding process structure with doubled efficiency. By optimizing and improving the welding process structure, it realizes that a moving workpiece can weld multiple stationary workpieces simultaneously, and after segmentation, multiple welding pieces are formed. Moreover, even when welding workpieces with a narrow width, good welding effects and welding efficiency can be ensured.

[0032] As Figure 1 shown, the electromagnetic pulse welding process structure includes a busbar 1 and a coil module 2. The busbar 1 is installed on the coil module 2 to generate an electromagnetic pulse for fixedly welding the workpiece module 4 on the welding jig 3 below the coil module 2.

[0033] As Figure 2 and Figure 3As shown in the figure, the bus bar 1 includes a cable 110, a positive bus bar module 120, and a negative bus bar module 130. The positive bus bar module 120 and the negative bus bar module 130 are respectively installed at the positive and negative terminals of the coil assembly 210 in the coil module 2. The two cables 110 are respectively connected to the negative bus bar module 130 and the positive bus bar module 120 in sequence, and together with the coil module 2, form a closed-loop induction coil.

[0034] The positive bus bar module 120 and the negative bus bar module 130 in this embodiment have the same structure, and both include a bus bar pressing part 121 and a bus bar base 122. First arc-shaped grooves are symmetrically arranged on the left and right sides of the bus bar base 122, and threaded holes are symmetrically arranged above and below the first arc-shaped grooves on the bus bar base 122. A second arc-shaped groove matching the first arc-shaped groove is arranged on one side surface of the bus bar pressing part 121. The first arc-shaped groove and the second arc-shaped groove cooperate to form a circular groove for accommodating the cable 110. Through holes matching the threaded holes are symmetrically arranged above and below the second arc-shaped groove on the bus bar pressing part 121. The two cables 110 are symmetrically pressed on the left and right sides of the bus bar base 122 through the bus bar pressing part 121, and bolts pass through the through holes and are screwed into the threaded holes to lock the bus bar pressing part 121 on the side of the bus bar base 122 and press the cable 110 tightly.

[0035] The coil module 2 includes a coil assembly 210, a welding strip press 220, a coil welding strip 230, and an insulating housing 240.

[0036] The coil assembly 210 in this embodiment is an overall bent circuit board structure with positive and negative poles distributed at intervals, and includes a positive coil 211 and a negative coil 212. The positive coil 211 is an L-shaped flat plate structure, and the negative coil 212 is a rectangular flat plate structure. One end of the positive coil 211 is connected to one end of the negative coil 212 through the coil welding strip 230. The free ends of the positive coil 211 and the negative coil 212 are the positive terminal and the negative terminal respectively, and they are arranged vertically at intervals. The bus bar base 122 of the positive bus bar module 120 is installed at the positive terminal, and the bus bar base 122 of the negative bus bar module 130 is installed at the negative terminal. Preferably, connection card slots 213 are arranged at the connection ends of the positive coil 211 and the negative coil 212 in this embodiment, and both ends of the coil welding strip 230 are respectively embedded and fixed in the connection card slots 213. This fixing form can facilitate the replacement of the coil welding strip 230. Semi-circular structures 214 are respectively arranged inside the connection ends of the positive coil 211 and the negative coil 212, which are smooth transition connection sections between the positive coil 211 and the negative coil 212 and the connection card slots 213, and can reduce the energy loss of the current.

[0037] The coil welding strip 230 in this embodiment is as Figure 4As shown, there is a busbar groove 231 formed by coil copper bars in the middle, which can cause the current to gather at the busbar groove 231 to reduce energy loss. By using the coil welding bars 230 with different lengths of busbar grooves 231 between the positive coil 211 and the negative coil 212, the welding of workpiece modules 4 with different widths can be achieved, greatly improving the versatility of the electromagnetic pulse welding process structure.

[0038] There are two base through-holes 241 and two compactor through-holes 242 on the insulating housing 240. The coil assembly 210 and the coil welding bars 230 are installed in the insulating housing 240. The two busbar bases 122 respectively pass through the base through-holes 241 and are connected to the positive coil 211 and the negative coil 212. The two welding bar compactors 220 respectively press the coil welding bars 230 on the welding jig 3 in the compactor through-holes 242.

[0039] On the upper surface of the welding jig 3, there are a moving workpiece groove and a stationary workpiece groove, and there is a welding interval between the moving workpiece groove and the stationary workpiece groove. The workpiece module 4 includes a moving workpiece 401 and a stationary workpiece 402. A moving workpiece 401 is pressed in the moving workpiece groove, and multiple stationary workpieces 402 are pressed side by side in the stationary workpiece groove. The coil welding bar 230 is pressed directly above the welding interval between the moving workpiece 401 and the stationary workpiece 402. The cable 110 transmits high-voltage current through the positive busbar module 120, the negative busbar module 130, and the coil module 2. The coil welding bar 230 generates a magnetic field through the high-voltage current. The moving workpiece 401 generates a current in the electromagnetic field and generates a magnetic field. Under the action of the electromagnetic repulsive force, the moving workpiece 401 instantaneously collides with the stationary workpiece 402 to complete the welding and form a welded part.

[0040] The workpiece module 4 of this embodiment can be narrow-width dissimilar metal plates such as aluminum-aluminum, aluminum-copper, and aluminum-steel. By using the coil welding bars 230 with different lengths of busbar grooves 231, the moving workpiece 401 with different widths can cover multiple stationary workpieces 402 with different quantities and widths, and different welded parts are formed after welding, such as Figure 5 the first welded part 410 and the second welded part 420 shown.

[0041] Although the principle of the present invention has been described in detail above in conjunction with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are only explanations of the illustrative implementation manners of the present invention and do not limit the scope of the present invention. The details in the embodiments do not constitute a limitation on the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple substitutions based on the technical solution of the present invention all fall within the protection scope of the present invention.

Claims

1. An electromagnetic pulse welding process structure with doubled efficiency, characterized in that, The electromagnetic pulse welding process structure includes a bus bar (1) and a coil module (2). The coil module (2) includes a coil assembly (210) and a coil welding strip (230); the coil assembly (210) includes a positive coil (211) and a negative coil (212); the positive coil (211) is connected to the negative coil (212) through the coil welding strip (230); the free ends of the positive coil (211) and the negative coil (212) are arranged at a predetermined interval; the bus bar (1) is respectively connected to the free ends of the positive coil (211) and the negative coil (212). The coil welding strip (230) is pressed above the gap between a moving workpiece (401) and one or more stationary workpieces (402) on a welding fixture (3); the coil welding strip (230) generates a magnetic field through the high-voltage current conveyed by the bus bar (1), the moving workpiece (401) generates a current under the action of the magnetic field and generates a magnetic field, and under the action of the electromagnetic repulsive force, the moving workpiece (401) instantaneously collides with the stationary workpiece (402) to complete the welding.

2. The electromagnetic pulse welding process structure with doubled efficiency according to claim 1, characterized in that, A bus bar groove (231) is formed in the middle of the coil welding strip (230), and the coil welding strip (230) with different lengths of the bus bar groove (231) is used to weld workpiece modules (4) with different widths between the positive coil (211) and the negative coil (212).

3. The electromagnetic pulse welding process structure with doubled efficiency according to claim 1, characterized in that, Connection card slots (213) are respectively arranged at the connection ends of the positive coil (211) and the negative coil (212) with the coil welding strip (230), and two ends of the coil welding strip (230) are respectively embedded into the connection card slots (213) for fixation.

4. The electromagnetic pulse welding process structure with doubled efficiency according to claim 3, characterized in that, Semicircular structures (214) are respectively formed inside the connection ends of the positive coil (211) and the negative coil (212), serving as smooth transition connection segments between the positive coil (211) and the negative coil (212) and the connection card slots (213).

5. The electromagnetic pulse welding process structure with doubled efficiency according to claim 4, characterized in that The whole coil assembly (210) is a bent circuit board structure with positive and negative poles distributed at intervals.

6. The electromagnetic pulse welding process structure with doubled efficiency according to claim 5, characterized in that, The positive coil (211) is an L-shaped flat plate structure, and the negative coil (212) is a rectangular flat plate structure; the positive end of the positive coil (211) and the negative end of the negative coil (212) are vertically arranged at intervals.

7. The electromagnetic pulse welding process structure with doubled efficiency according to claim 1, characterized in that, The coil module (2) further includes a welding strip presser (220) and an insulating housing (240); the coil assembly (210) and the coil welding strip (230) are embedded in the insulating housing (240); two presser through holes (242) are formed in the insulating housing (240); the two welding strip pressers (220) respectively press the coil welding strip (230) on the welding fixture (3) through the presser through holes (242).

8. The electromagnetic pulse welding process structure with doubled efficiency according to claim 1, characterized in that, The bus bar (1) includes a cable (110), a positive bus bar module (120), and a negative bus bar module (130); the positive bus bar module (120) and the negative bus bar module (130) are respectively installed at the free ends of the positive coil (211) and the negative coil (212); the two cables (110) are respectively connected to the negative bus bar module (130) and the positive bus bar module (120) in sequence.

9. The electromagnetic pulse welding process structure with doubled efficiency according to claim 8, characterized in that, The positive bus bar module (120) and the negative bus bar module (130) have the same structure, and both include a bus bar pressing member (121) and a bus bar base (122); the two cables (110) are respectively symmetrically crimped to the left and right sides of the bus bar base (122) through the bus bar pressing member (121).

10. The electromagnetic pulse welding process structure with doubled efficiency according to claim 9, characterized in that, First arc-shaped grooves are symmetrically arranged on the left and right sides of the bus bar base (122), and a second arc-shaped groove matching the first arc-shaped groove is arranged on one side of the bus bar pressing member (121), and the first arc-shaped groove and the second arc-shaped groove form a circular groove for accommodating the cable (110).

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