Resistance heating device with flexible free telescopic function

Abstract

The utility model belongs to the technical field of metal processing, and relates to a resistance heating device with a flexible free telescopic function, which comprises a workbench, a transformer, an electrode plate, a cable, a first electrode chuck and a second electrode chuck, the electrode plate is in conductive connection with one electrode of the transformer, the first electrode chuck is in conductive connection with the electrode plate, and the second electrode chuck is in conductive connection with the cable. A sliding seat is slidably mounted on the workbench, the second electrode chuck is mounted on the sliding seat, one end of the cable is conductively connected with the other electrode of the transformer, and the other end of the cable is conductively connected with the second electrode chuck. A product can be rapidly heated by utilizing a resistance heating principle, the generation amount of oxide on the surface of the product is reduced, the braided wire flexible cable is adopted, and the electrode chuck on one side is arranged on the sliding seat, so that the heating requirements of products with different sizes can be met, and in the product heating expansion process, the product can be rapidly heated. And the second electrode chuck can synchronously move along with the sliding seat, so that the obstruction of the electrode chucks on product expansion is avoided, the product quality is improved, and the mold entering precision of the product is improved.

Description

Technical Field

[0001] This utility model relates to a resistance heating device with flexible and free-stretching function, belonging to the field of metal processing technology. Background Technology

[0002] In traditional thermoforming production lines, the heating process for metal billets mainly uses box furnaces and roller hearth furnaces. These types of equipment use radiant heating to bring the metal to the forming temperature. However, due to the long heating time, a large amount of oxide scale is easily generated on the surface of the bare metal sheet, which not only seriously damages the surface quality of the product, but also has an adverse effect on the mechanical properties of the material. Moreover, box furnaces and roller hearth furnaces are bulky, occupy a lot of factory space, and require complex temperature control systems, resulting in high equipment maintenance costs and increased operational difficulty.

[0003] Existing resistance heating devices typically fix copper electrode plates alternately on both ends of the transformer, with electrode clamps secured to the copper electrode plates by bolts and nuts. This has the following drawbacks: First, the distance between the two electrode clamps is fixed, making it impossible to move and adjust their positions freely. When processing metal billets of different lengths, at least one clamp must be disassembled and reassembled to the matching hole position, resulting in extended mold change cycles and a cumbersome assembly process. Second, the clamps use a completely fixed clamping method, which completely restricts the axial freedom of the billet during heating. This prevents the deformation caused by the thermal expansion of the metal from being released, ultimately leading to excessive plastic deformation of the billet and affecting the accuracy of subsequent mold feeding and forming quality. Utility Model Content

[0004] The purpose of this utility model is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

[0005] The technical solution provided by this utility model is as follows: A resistance heating device with flexible and free-expanding function includes a workbench, a transformer, an electrode plate, a cable, a first electrode clamp, and a second electrode clamp. The electrode plate is electrically connected to one electrode of the transformer, the first electrode clamp is electrically connected to the electrode plate, a slide block is slidably mounted on the workbench, the second electrode clamp is mounted on the slide block, one end of the cable is electrically connected to the other electrode of the transformer, and the other end of the cable is electrically connected to the second electrode clamp.

[0006] Compared with existing technologies, the technical solution provided by this utility model has the following beneficial effects: The resistance heating device of this utility model is based on the principle of resistance heating. The product is fixed between two electrode clamps, and the product is rapidly heated to above the austenitizing temperature using a heating current. This rapid heating process not only effectively reduces the amount of oxides generated on the product surface, improving product quality, but also significantly improves the production efficiency of the thermoforming production line by shortening the heating time, meeting the needs of large-scale production. Compared with traditional equipment such as box furnaces and roller hearth furnaces, this device has a compact structure, reducing the equipment footprint and making it more conducive to production line layout and workshop space utilization.

[0007] This invention mounts a second electrode clamp on a slide. The second electrode clamp is electrically connected to one electrode of a transformer via a cable. The cable is a flexible, extendable cable with braided outer layers, thus giving the resistance heating device a flexible, extendable function. Based on this, when heating products of different lengths, there is no need to disassemble or reassemble the electrode clamp; the clamp position can be adjusted simply by moving the slide, thereby meeting the heating requirements of products of different sizes and shapes. Furthermore, during the product's thermal expansion, the second electrode clamp moves synchronously with the slide, avoiding obstruction of product expansion, improving product quality, and increasing the accuracy of mold insertion.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the workbench is provided with a mounting base, the mounting base is provided with a slide rail, and the slide block is slidably mounted on the slide rail.

[0010] The advantage of adopting the above-mentioned further solution is that the slide rail structure can ensure that the slide maintains a stable motion trajectory during the sliding process, so as to lift the electrode chuck to move along the predetermined trajectory.

[0011] Furthermore, it also includes a cylinder, the output shaft of which is drivenly connected to the slide block to drive the slide block to slide along the slide rail.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the cylinder can reset the slide to the initial position. After the resistance heating device is powered on, the cylinder automatically disconnects, which does not affect the free movement of the electrode clamp. The automated operation of the cylinder replaces the manual reset process of the slide, improving the automation level of the production line.

[0013] Furthermore, it also includes a limiting guide rod, one end of which is connected to the slide block. The mounting base is provided with a limiting plate, and the other end of the limiting guide rod passes through the limiting plate, with a limiting nut for limiting displacement installed at its end.

[0014] The beneficial effects of adopting the above-mentioned further solution are that the limiting guide rod can limit the maximum displacement of the slide, the limiting nut can adjust the effective length of the limiting guide rod, thereby adjusting the maximum displacement of the slide, and in addition, the limiting guide rod can absorb the vibration generated during the movement of the slide, improving the stability and reliability of the equipment.

[0015] Furthermore, the workbench is provided with multiple sets of assembly holes, and the mounting base can be detachably mounted on the workbench through any one or more sets of assembly holes.

[0016] The advantage of adopting the above-mentioned further solution is that the mounting base can be installed on the worktable through different mounting holes, thereby flexibly adjusting the position of the electrode chuck to adapt to products of different sizes and shapes.

[0017] Furthermore, the electrode plate is made of copper or a copper alloy.

[0018] The beneficial effect of adopting the above-mentioned further solutions is that copper or copper alloys have good electrical conductivity, which can ensure the efficient transmission of heating current and improve heating efficiency.

[0019] Furthermore, the first electrode clamp and the second electrode clamp are located on both sides of the transformer, respectively.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the two electrode clamps are located on both sides of the transformer, which can ensure that the heating current is evenly distributed on the product, achieve uniform heating, and at the same time reduce the electromagnetic interference of the transformer to the electrode clamps. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the resistance heating device of this utility model;

[0023] Figure 2 This is a three-dimensional structural schematic diagram of the resistance heating device of this utility model from another perspective.

[0024] Figure 3 This is a front view of the resistance heating device of this utility model;

[0025] Figure 4 For the present utility model Figure 3 Enlarged view of part A;

[0026] In the diagram, 1 is the workbench; 2 is the transformer; 3 is the electrode plate; 4 is the cable; 5 is the first electrode chuck; 6 is the second electrode chuck; 7 is the slide; 8 is the mounting base; 9 is the cylinder; 10 is the limit guide rod; 11 is the limit nut; and 12 is the assembly hole. Detailed Implementation

[0027] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and do not imply any priority in order or any specific technical meaning. Furthermore, the concepts of "connection" and "linkage" mentioned in this application, unless otherwise specified, are considered to include both direct connection (linkage) and indirect connection (linkage).

[0028] When interpreting the description of this application, it should be clarified that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating directions or positional relationships, are based on the perspective and layout shown in the accompanying drawings. They are intended to facilitate explanation and simplify the description process, and are not absolute limitations on the actual location, construction method, or operating mode of the described device or element. Therefore, these terms should not be construed as restrictive interpretations of the content of this application.

[0029] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0030] like Figure 1 - Figure 4 As shown, a resistance heating device with flexible and freely expandable function includes a workbench 1, a transformer 2, an electrode plate 3, a cable 4, a first electrode clamp 5, and a second electrode clamp 6. One end of the electrode plate 3 is electrically connected to one electrode of the transformer 2. The first electrode clamp 5 is installed on the other end of the electrode plate 3 and is electrically connected to the electrode plate 3. A slide block 7 is slidably installed on the workbench 1, and the second electrode clamp 6 is installed on the slide block 7. One end of the cable 4 is electrically connected to the other electrode of the transformer 2, and the other end of the cable 4 is electrically connected to the second electrode clamp 6.

[0031] The worktable 1 is provided with a mounting base 8, and the mounting base 8 is provided with a slide rail. The slide block 7 is slidably mounted on the slide rail. The slide rail structure can ensure that the slide block 7 maintains a stable movement trajectory during sliding, so as to lift the electrode chuck to move along a predetermined trajectory.

[0032] The resistance heating device also includes a cylinder 9, the output shaft of which is drivenly connected to the slide block 7 to drive the slide block 7 to slide along the slide rail. The cylinder 9 can reset the slide block 7 to its initial position. After the resistance heating device is powered on, the cylinder 9 automatically disconnects, without affecting the free movement of the electrode clamps. The automated operation of the cylinder 9 replaces the manual reset process of the slide block 7, improving the automation level of the production line.

[0033] The resistance heating device also includes a limiting guide rod 10. One end of the limiting guide rod 10 is connected to the slide 7. A limiting plate is provided on the mounting base 8. The other end of the limiting guide rod 10 passes through the limiting plate and a limiting nut 11 for limiting displacement is installed at its end. The limiting guide rod 10 can limit the maximum displacement of the slide 7. The limiting nut 11 can adjust the effective length of the limiting guide rod 10, thereby adjusting the maximum displacement of the slide 7. In addition, the limiting guide rod 10 can absorb the vibration generated during the movement of the slide 7, improving the stability and reliability of the equipment.

[0034] The workbench 1 is provided with multiple sets of assembly holes 12, and the mounting base 8 can be detachably mounted on the workbench 1 through any one or more sets of assembly holes 12. The mounting base 8 can be mounted on the workbench 1 through different assembly holes 12, thereby flexibly adjusting the position of the electrode chuck to adapt to products of different sizes and shapes.

[0035] The electrode plate 3 is made of copper or a copper alloy. Copper or copper alloy has good electrical conductivity, which can ensure efficient transmission of heating current and improve heating efficiency.

[0036] The first electrode clamp 5 and the second electrode clamp 6 are located on both sides of the transformer 2, respectively. The location of the two electrode clamps on both sides of the transformer 2 ensures that the heating current is evenly distributed on the product, achieving uniform heating, and also reduces electromagnetic interference from the transformer 2 to the electrode clamps.

[0037] The working principle of the resistance heating device of this utility model is as follows: The resistance heating device of this utility model for thermoforming production line provides heating power through transformer 2. The first electrode clamp 5 is fixed on the electrode plate 3 and connected to the positive terminal of transformer 2. The second electrode clamp 6 is installed on the slide 7 and connected to the negative terminal of transformer 2. Before heating, the product is first fixed between the two electrode clamps. The metal tube blank or plate is heated quickly by using the Joule heating effect. During heating, the current flows into the product through the first electrode clamp 5 and then flows back through the sliding electrode clamp that can move synchronously with the expansion of the product. The slide 7 and the limiting guide mechanism realize adaptive expansion during the heating process. After heating is completed, the cylinder 9 drives the slide 7 to reset.

[0038] This utility model's resistance heating device is based on the principle of resistance heating. It rapidly heats products to above the austenitizing temperature using a heating current, effectively reducing the amount of oxides formed on the product surface and improving product quality. Furthermore, it significantly increases the production efficiency of thermoforming production lines by shortening heating time, meeting the needs of large-scale production. Compared to traditional equipment such as box furnaces and roller hearth furnaces, this device has a compact structure, reducing the equipment's footprint and facilitating production line layout and workshop space utilization. This utility model also uses a braided flexible cable 4, mounting one electrode clamp on a slide 7. Therefore, when heating products of different lengths, there is no need to disassemble or reassemble the electrode clamp; the clamp position can be adjusted simply by moving the slide 7 to adapt to the heating requirements of products of different sizes and shapes. Moreover, during the product's thermal expansion process, the second electrode clamp 6 can move synchronously with the slide 7, avoiding obstruction of product expansion by the electrode clamp, improving product quality, and increasing the product's mold insertion accuracy.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A resistance heating device with flexible, freely stretching function, characterized in that, The device includes a workbench (1), a transformer (2), an electrode plate (3), a cable (4), a first electrode clamp (5), and a second electrode clamp (6). The electrode plate (3) is electrically connected to one electrode of the transformer (2), and the first electrode clamp (5) is electrically connected to the electrode plate (3). A slide block (7) is slidably mounted on the workbench (1), and the second electrode clamp (6) is mounted on the slide block (7). One end of the cable (4) is electrically connected to the other electrode of the transformer (2), and the other end of the cable (4) is electrically connected to the second electrode clamp (6).

2. The resistance heating device with flexible free expansion function according to claim 1, characterized in that, The workbench (1) is provided with a mounting base (8), the mounting base (8) is provided with a slide rail, and the slide block (7) is slidably mounted on the slide rail.

3. The resistance heating device with flexible and free scalable function according to claim 2, characterized in that, It also includes a cylinder (9), the output shaft of which is driven to the slide (7) to drive the slide (7) to slide along the slide rail.

4. The resistance heating device with flexible and free scalable function according to claim 3, characterized in that, It also includes a limiting guide rod (10), one end of which is connected to the slide (7), a limiting plate is provided on the mounting base (8), the other end of the limiting guide rod (10) passes through the limiting plate, and a limiting nut (11) for limiting displacement is installed at its end.

5. The resistance heating device with flexible and free scalable function according to any one of claims 2-4, characterized in that, The workbench (1) is provided with multiple sets of assembly holes (12), and the mounting base (8) can be detachably mounted on the workbench (1) through any one or more sets of assembly holes (12).

6. The resistance heating device with flexible and free scalable function according to any one of claims 1-4, wherein, The electrode plate (3) is made of copper or a copper alloy.

7. The resistance heating device having a flexible and free scalable function according to claim 1, wherein, The first electrode clamp (5) and the second electrode clamp (6) are located on both sides of the transformer (2).

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