Through-flow electromagnetic forming device based on wide electrode group

Abstract

A through-flow electromagnetic forming device based on wide electrode sets comprises a forming die, placing planes are formed by the upper end faces of the two ends of the forming die, the electrode sets are placed on the two placing planes, each electrode set comprises a first electrode and a second electrode which are distributed up and down, and the two electrode sets clamp the two ends of a workpiece to be formed respectively. The width of each electrode group is larger than that of the workpiece to be formed, and the cross sectional area of each electrode group is not smaller than the area of each placing plane; an edge pressing plate is arranged above the two electrode sets, and the electrode sets and the edge pressing plate are detachably connected to the forming die through the locking piece. Due to the arrangement of the width and the cross section area of the electrode group, the contact area between the workpiece and the electrode is large, the contact resistance and energy loss are reduced, the uniformity of current distribution in the workpiece is effectively improved, and the situation that the workpiece or the electrode is damaged due to overheating due to local heating when current passes through caused by overlarge contact resistance is avoided; and the workpiece and the electrode group are fixed on the forming die through the pressing block, so that the workpiece and the electrode group are not easy to displace.

Description

Technical Field

[0001] This utility model relates to the field of metal forming technology, and in particular to a current-carrying electromagnetic forming device based on a wide electrode group. Background Technology

[0002] Electromagnetic forming (EMF) is a high-speed, high-energy, short-time pulse processing technology that utilizes the electromagnetic force exerted on metals in a strong pulsed magnetic field to induce plastic deformation. As a cutting-edge method for overcoming bottlenecks in metal processing, EMF has demonstrated significant advantages in the forming and manufacturing of lightweight alloys (aluminum, magnesium, titanium, etc.) due to its non-contact and high-speed characteristics, particularly excelling in the fields of automotive lightweighting and the processing of complex aerospace structural components.

[0003] The current electromagnetic forming equipment has the following problems: First, the electrode is a small-area electrode, and the contact area between the workpiece and the electrode is too small, resulting in excessive contact resistance and local heating (Joule heating) when current passes through, which may cause the workpiece or electrode to be damaged due to overheating; Second, the electrode and the workpiece are not equipped with a fixing device at the same time, which makes them prone to displacement, or the fixing devices for the two are set separately, which is more cumbersome. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a current-carrying electromagnetic forming device based on a wide electrode group to solve at least one of the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A current-carrying electromagnetic forming device based on a wide electrode assembly includes a forming mold. The upper surfaces of both ends of the forming mold form placement planes. Electrode assemblies are placed on the two placement planes. Each electrode assembly includes a first electrode and a second electrode distributed vertically. The two electrode assemblies respectively clamp the two ends of the workpiece to be formed. The width of each electrode assembly is greater than the width of the workpiece to be formed, and the cross-sectional area of ​​each electrode assembly is not less than the area of ​​each placement plane. A pressure plate is provided above the two electrode assemblies. The device also includes a locking member that detachably connects the electrode assemblies and the pressure plate to the forming mold.

[0007] Furthermore, the first electrode and the second electrode are copper electrodes.

[0008] Furthermore, each of the electrode groups is detachably connected to a copper lug, through which the discharge circuit is connected to the electrode group.

[0009] Furthermore, it also includes bolts and nuts, through which each of the electrode groups is detachably connected to the copper lug.

[0010] Furthermore, each of the electrode groups has fixed positions at both ends along its own width direction, and the workpiece to be formed is located between the two fixed positions.

[0011] Furthermore, the pressure plate, the first electrode, and the second electrode are respectively provided with a first fixing hole, a second fixing hole, and a third fixing hole, and the locking member can be detachably connected to the forming mold after passing through the first fixing hole, the second fixing hole, and the third fixing hole.

[0012] Furthermore, the forming mold is a concave mold, and the space between the two placement planes constitutes a reserved deformation space for the workpiece to be formed.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model proposes a current-carrying electromagnetic forming device based on a wide electrode group, including a forming mold. The upper surfaces of both ends of the forming mold form placement planes, and electrode groups are placed on the two placement planes. Each electrode group includes a first electrode and a second electrode distributed vertically. The two electrode groups respectively clamp the two ends of the workpiece to be formed, and the width of each electrode group is greater than the width of the workpiece to be formed, and the cross-sectional area of ​​each electrode group is not less than the area of ​​each placement plane. A pressure plate is provided above the two electrode groups, and a locking component is also included. The locking component detachably connects the electrode groups and the pressure plate to the forming mold. The setting of the electrode group width and cross-sectional area makes the contact area between the workpiece and the electrode larger, which not only reduces the contact resistance and energy loss, but also effectively improves the uniformity of the current distribution inside the workpiece, avoiding local heating (Joule heating) when current passes through due to excessive contact resistance, thus preventing the workpiece or electrode from being damaged due to overheating. The setting of the pressure block fixes the workpiece and the electrode group on the forming mold, making it difficult for the workpiece and the electrode group to shift, and the structure is simple. In addition, the upper and lower two-piece setting of the electrode group allows the electrode to adapt to workpieces of different thicknesses, making it highly applicable.

[0015] 2. This utility model proposes a current-carrying electromagnetic forming device based on a wide electrode assembly. Each electrode assembly is detachably connected to a copper lug, through which the discharge circuit is connected to the electrode assembly. This setup eliminates the need for a discharge coil, allowing pulsed current to be directly introduced into the workpiece through the copper lug and electrode assembly, thereby enhancing the electromagnetic force and forming capability while reducing energy loss.

[0016] 3. The present invention proposes a current-carrying electromagnetic forming device based on a wide electrode group. The pressure plate, the first electrode and the second electrode are respectively provided with a first fixing hole, a second fixing hole and a third fixing hole. The locking member can be detachably connected to the forming mold after passing through the first fixing hole, the second fixing hole and the third fixing hole, so as to ensure that the workpiece and the electrode group will not easily undergo horizontal displacement during the forming process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is one of the schematic diagrams of a current-carrying electromagnetic forming device based on a wide electrode group according to this utility model;

[0019] Figure 2 This is an exploded view of a current-carrying electromagnetic forming device based on a wide electrode group according to the present invention;

[0020] Figure 3 This is a second schematic diagram of a current-carrying electromagnetic forming device based on a wide electrode group according to this utility model;

[0021] In the figure, 10 is the forming mold; 101 is the placement plane; 102 is the reserved deformation space; 201 is the first electrode; 202 is the second electrode; 30 is the workpiece to be formed; 40 is the pressure plate; 50 is the locking component; 60 is the copper lug; 701 is the first fixing hole; 702 is the second fixing hole; and 703 is the third fixing hole. Detailed Implementation

[0022] The following is combined with Figure 1-3 This utility model will be described in detail.

[0023] A current-carrying electromagnetic forming device based on a wide electrode assembly includes a forming mold 10. The upper surfaces of both ends of the forming mold 10 form placement planes 101. Electrode assemblies are placed on the two placement planes 101. Each electrode assembly includes a first electrode 201 and a second electrode 202 distributed vertically. The two electrode assemblies respectively clamp the two ends of the workpiece 30 to be formed, and the width of each electrode assembly is greater than the width of the workpiece 30 to be formed. The cross-sectional area of ​​each electrode assembly is not less than the area of ​​each placement plane 101. A pressure plate 40 is provided above the two electrode assemblies. The device also includes a locking member 50, which detachably connects the electrode assembly and the pressure plate 40 to the forming mold 10. The wide and cross-sectional area of ​​the electrode assembly allows for a larger contact area between the workpiece and the electrode, reducing contact resistance and energy loss. This prevents localized heating (Joule heating) caused by excessive contact resistance, which could damage the workpiece or electrode due to overheating. Simultaneously, it disperses the current input points, reducing current concentration at workpiece edges or sharp corners, effectively improving the uniformity of current distribution within the workpiece and enabling it to generate uniform electromagnetic force. The pressure block simultaneously fixes the workpiece and electrode assembly to the forming mold 10, preventing displacement and simplifying the structure. The larger width and cross-sectional area of ​​the electrode assembly also accommodates various workpieces 30 of different lengths and widths. The upper and lower two-piece design of the electrode assembly allows for adaptability to workpieces 30 of different thicknesses, enhancing its versatility.

[0024] In this embodiment, the first electrode 201 and the second electrode 202 are copper electrodes. Specifically, the first electrode 201 and the second electrode 202 are used to discharge onto the workpiece, and at the same time, the first electrode 201 and the second electrode 202, together with the pressure plate 40, serve to press and fix the workpiece.

[0025] In this embodiment, each electrode group is detachably connected to a copper lug 60, which connects the discharge circuit to the electrode group. This setup eliminates the need for a discharge coil, allowing pulsed current to be directly introduced into the workpiece through the copper lug 60 and the electrode group, enhancing the electromagnetic force and forming capability while reducing energy loss between the coil and the workpiece in traditional electromagnetic forming. Besides using the copper lug 60, a discharge coil, commonly used in the art, can also be used. The entire forming device is placed in the center of the discharge coil, which generates a magnetic field through current. This magnetic field then acts on the workpiece, causing it to deform under the electromagnetic force. Both methods are acceptable and will not be elaborated upon here.

[0026] In this embodiment, bolts and nuts are also included, and each electrode assembly is detachably connected to the copper lug 60 via bolts and nuts. Specifically, the first electrode 201 and the second electrode 202 include a first region for pressing the workpiece and a second region on the side of the first region. Both the first electrode 201 and the second region of the second electrode 202 are provided with first through holes, and the copper lug 60 is provided with a second through hole. The copper lug 60 is placed above the first electrode 201, and then bolts are passed through the second through hole and the two first through holes in sequence, and then secured with nuts. Although the copper lug 60 only contacts the first electrode 201, current can still flow through the second electrode 202 via the bolts and nuts. This connection between the electrode assembly and the copper lug 60 via bolts and nuts allows for quick separation of the electrode assembly from the discharge circuit. Disassembly only requires loosening or tightening the nuts, facilitating the replacement of worn electrodes or adjustment of the discharge circuit layout.

[0027] In this embodiment, each electrode group has fixed positions at both ends along its own width direction, and the workpiece 30 to be formed is located between the two fixed positions.

[0028] In this embodiment, the pressure plate 40, the first electrode 201, and the second electrode 202 are respectively provided with a first fixing hole 701, a second fixing hole 702, and a third fixing hole 703. The locking member 50 passes through the first fixing hole 701, the second fixing hole 702, and the third fixing hole 703 and is detachably connected to the forming mold 10 to ensure that the workpiece and the electrode assembly will not easily undergo horizontal displacement during the forming process. Specifically, the locking member 50 is a screw or a bolt without a nut, and the locking member 50 is threadedly connected to a threaded hole in the upper surface of the forming mold 10.

[0029] In this embodiment, the forming mold 10 is a concave mold, and the space between the two placement planes 101 constitutes the reserved deformation space 102 of the workpiece 30 to be formed.

[0030] In this embodiment, there are four electrodes in total, one on each side; two pressure plates 40; and two copper noses 60.

[0031] The current-carrying electromagnetic forming device based on a wide electrode group proposed in this utility model is used as follows:

[0032] First, place the second electrode 202, the workpiece 30 to be formed, the first electrode 201, and the pressure plate 40 sequentially from bottom to top at both ends of the forming mold 10. Then, fix them with locking parts 50 to prevent horizontal displacement of the workpiece and electrode assembly during the forming process. Next, install copper lugs 60 next to the electrode assembly. The discharge circuit is connected to the electrode assembly through the copper lugs 60. The pulse current flows through the workpiece 30, generating a magnetic field perpendicular to the current direction, thereby generating the electromagnetic force required for the deformation of the workpiece 30, causing it to deform.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A current-carrying electromagnetic forming device based on a wide electrode array, characterized in that, The device includes a forming mold, with the upper surfaces at both ends of the forming mold forming placement planes. Electrode groups are placed on the two placement planes, each electrode group including a first electrode and a second electrode distributed vertically. The two electrode groups respectively clamp the two ends of the workpiece to be formed, and the width of each electrode group is greater than the width of the workpiece to be formed. The cross-sectional area of ​​each electrode group is not less than the area of ​​each placement plane. A pressure plate is provided above the two electrode groups, and a locking member is also included. The locking member detachably connects the electrode groups and the pressure plate to the forming mold.

2. The current-carrying electromagnetic forming device based on a wide electrode group as described in claim 1, characterized in that, The first electrode and the second electrode are copper electrodes.

3. The current-carrying electromagnetic forming device based on a wide electrode group as described in claim 2, characterized in that, Each of the electrode groups is detachably connected to a copper lug, through which the discharge circuit is connected to the electrode group.

4. The current-carrying electromagnetic forming device based on a wide electrode group as described in claim 3, characterized in that, It also includes bolts and nuts, through which each of the electrode groups is detachably connected to the copper lug.

5. A current-carrying electromagnetic forming apparatus based on a wide electrode group as described in claim 1 or 3, characterized in that, Each of the electrode groups has fixed positions at both ends along its own width direction, and the workpiece to be formed is located between the two fixed positions.

6. The current-carrying electromagnetic forming apparatus based on a wide electrode group as described in claim 5, characterized in that, The pressure plate, the first electrode, and the second electrode are respectively provided with a first fixing hole, a second fixing hole, and a third fixing hole. The locking member can be detachably connected to the forming mold after passing through the first fixing hole, the second fixing hole, and the third fixing hole.

7. The current-carrying electromagnetic forming apparatus based on a wide electrode group as described in claim 1, characterized in that, The forming mold is a concave mold, and the space between the two placement planes constitutes the reserved deformation space for the workpiece to be formed.

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