An automatic impulse welding device

Abstract

The utility model discloses an automatic pulse welding device, including support platform and the work station disc of setting on support platform, work station disc is with a plurality of hot riveting mechanism periphery arrangement. Work station disc is by fixed first disc body and rotatable second disc body is composed, be equipped with cavity on the second disc body, the cavity lateral wall is alternately provided with a plurality of first point position and second point position along the circumference, respectively located the position of far away and close to the cavity center. The first disc body is provided with positioning mechanism, and the positioning mechanism has the positioning end, can be in the first point position when not automatic adjustment to the first point position, realizes the automatic alignment of work station. The positioning mechanism can include the shell, spring piece, the rod body of sliding connection and the positioning wheel. The device still includes the fixing mechanism for fixing the welding piece and is used for realizing the hot riveting mechanism of hot riveting operation. The device simple structure can realize the alignment automation, reduces the operation difficulty, improves the welding efficiency and equipment reliability.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, specifically to an automatic pulse welding device. Background Technology

[0002] With the increasing demand for high-strength, heat-damage-free connections between plastic-metal and plastic-plastic micro-parts in consumer electronics, automotive lightweighting, and other fields, "pulse hot riveting" equipment has emerged. This type of equipment utilizes the principle of pulse resistance heating: a pulsed current instantaneously generates Joule heat through a high-resistance alloy riveting head (such as tungsten-molybdenum), rapidly heating the head to a set value in approximately 1 second. The riveting head is then pressed into the plastic rivet to be formed, causing localized softening and shaping under constant pressure and limit control. During the cooling phase, rapid solidification is achieved through compressed air or water cooling. This process combines the localized plasticizing and locking mechanism of traditional hot riveting with the "rapid heating-rapid cooling" characteristics of pulse welding, significantly shortening single-point cycle time, reducing the heat-affected zone, and improving welding consistency. It has been widely used in the mass assembly of precision components such as mobile phone frame clips, automotive headlight housings, and function keys for small household appliances.

[0003] To fully leverage the cycle time advantage of pulse hot riveting, production lines are typically equipped with multi-station operating tables to achieve cyclical switching between steps such as "loading-riveting-unloading". Existing multi-station worktables mostly employ servo motors and gear / cam dividers for drive and positioning mechanisms, resulting in long transmission chains and high assembly and maintenance costs. If manual rotation positioning is used, the lack of precision limit or damping positioning devices makes it difficult to guarantee the coaxiality and repeatability of positioning between each station and the riveting head, easily leading to quality fluctuations such as welding misalignment and incomplete welds. Therefore, achieving high-precision positioning and stable switching of multi-station turntables while simplifying the structure and controlling costs has become a key technical issue for improving the performance of automated pulse hot riveting equipment. Utility Model Content

[0004] The purpose of this invention is to provide an automatic pulse welding device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic pulse welding device, including a support platform, a work station disc on the support platform, and a plurality of hot riveting mechanisms arranged circumferentially on the work station disc;

[0006] The workstation disk includes:

[0007] A first disk body is disposed on the support platform;

[0008] The second disc body is coaxially arranged and rotatably connected to the first disc body. The second disc body has a cavity. Multiple first points and multiple second points are alternately arranged along the circumference of the side wall of the cavity body. The first points are located away from the center of the cavity body, and the second points are located close to the center of the cavity body.

[0009] A positioning mechanism is provided on the first disc body. The positioning mechanism has a positioning end and is used to automatically adjust to the first position when the positioning end is not at the first point. By setting multiple points on the side wall of the cavity and cooperating with the automatic adjustment function of the positioning mechanism, automatic alignment of the workstation can be achieved without manual intervention, effectively reducing the difficulty of operation and improving the efficiency of operation. In addition, the workstation disc has a simple structure, does not rely on a complex electric drive system, has high overall design reliability, and is easy to manufacture and maintain.

[0010] Preferably, the positioning mechanism includes: a housing disposed on the first disc, and a spring element disposed inside the housing; a rod slidably connected to the housing, one end of the rod abutting against the spring element, and the other end being provided with a positioning wheel, the positioning wheel serving as the positioning end for positioning in conjunction with the first point.

[0011] Preferably, the workstation disc is provided with a fixing mechanism for fixing the welded parts; the positioning mechanism includes: a plurality of first cylinders, the first cylinders being disposed on the first disc body; and a pressure rod assembly, the pressure rod assembly being disposed at the output end of the first cylinders, for applying a clamping force to the welded parts during the welding process.

[0012] Preferably, the hot riveting mechanism includes: a bracket, which is disposed on the support platform; and a second cylinder, which is disposed on the bracket, and the output end of the second cylinder is provided with a riveting head.

[0013] Preferably, there is a smooth transition between the first point and the second point. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model mounted on the frame;

[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 3 This is the hot riveting mechanism of the present invention;

[0017] Figure 4 This diagram shows the changes in the bottom of the working disc of this utility model during operation.

[0018] Figure 5This is a schematic diagram of the internal structure of the shell of this utility model.

[0019] In the diagram: 1. Support platform; 2. Workstation disc; 201. First disc body; 202. Second disc body; 203. Cavity; 204. First position point; 205. Second position point; 206. Positioning mechanism; 2061. Housing; 2062. Spring component; 2063. Rod body; 2064. Positioning wheel; 3. Hot riveting mechanism; 301. Bracket; 302. Second cylinder; 303. Press head; 4. Fixing mechanism; 401. First cylinder; 402. Press rod assembly. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integrated connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0024] Example

[0025] Please see Figure 1-5As shown, the present invention provides an automatic pulse welding device technical solution: an automatic pulse welding device, including a support platform 1, a work station disk 2 on the support platform 1, and a plurality of hot riveting mechanisms 3 arranged circumferentially on the work station disk 2;

[0026] The workstation disc 2 includes components such as a first disc body 201, a second disc body 202, and a positioning mechanism 206. The first disc body 201 is mounted on the support platform 1. The second disc body 202 is coaxially mounted and rotatably connected to the first disc body 201. A cavity 203 is provided on the second disc body 202. Multiple first points 204 and multiple second points 205 are alternately arranged along the circumference of the side wall of the cavity 203. The first points 204 are located away from the center of the cavity 203, and the second points 205 are located close to the center of the cavity 203. The positioning mechanism 206 is mounted on the first disc body 201. The positioning mechanism 206 has a positioning end and is used to automatically adjust to the position of the first point 204 when the positioning end is not at the first point 204.

[0027] In this embodiment, multiple "positioning points" are evenly distributed circumferentially on the upper surface of the second disc 202 for precise placement of the workpiece to be welded. The positioning points can be designed as positioning grooves according to the product shape, or machined on the disc surface in the form of scales or outline markings, facilitating operator identification and correct placement of the workpiece. Each positioning point corresponds one-to-one with the welding center of the adjacent first point 204, ensuring that once the workstation disc 2 has rotated into position, the hot riveting mechanism 3 can directly press down to complete the welding without further fine-tuning.

[0028] By setting multiple points on the side wall of cavity 203 and cooperating with the automatic adjustment function of positioning mechanism 206, automatic alignment of the workstation can be achieved without manual intervention, effectively reducing the difficulty of operation and improving the efficiency of operation. In addition, the workstation disc 2 has a simple structure, does not rely on a complex electric drive system, has high overall design reliability, and is easy to manufacture and maintain.

[0029] The positioning mechanism 206 includes components such as a housing 2061 and a rod 2063. The housing 2061 is disposed on the first disc 201. A spring 2062 is provided inside the housing 2061. The rod 2063 is slidably connected to the housing 2061. One end of the rod 2063 abuts against the spring 2062, and the other end is provided with a positioning wheel 2064. The positioning wheel 2064 serves as a positioning end and is used to cooperate with the first point 204 for positioning.

[0030] In this embodiment, the rod 2063 and the housing 2061 are slidably connected by a groove, and matching stop members are provided at the grooves of the rod 2063 and the housing 2061 to prevent the rod 2063 from accidentally falling off. The spring 2062 includes a spring body and a push plate. The spring body abuts against the rod 2063 through the push plate. In addition, the spring body should preferably be a thin wire, large diameter, multi-turn, low-stiffness compression spring so that the elastic force is slowly and evenly transmitted to the rod 2063, avoiding the rod 2063 from instantly accelerating and impacting the positioning wheel 2064 when resetting.

[0031] The workstation disc 2 is provided with a fixing mechanism 4 for fixing the welded parts; the positioning mechanism 206 includes: a plurality of first cylinders 401 and a pressure rod assembly 402. The first cylinders 401 are located on the first disc body 201, and the pressure rod assembly 402 is located at the output end of the first cylinders 401, for applying a clamping force to the welded parts during the welding process.

[0032] In this embodiment, the pressure rod assembly 402 consists of an extension rod and a pressure rod. One end of the extension rod is fixedly connected to the first cylinder 401, and the other end is fixedly connected to the pressure rod. When the first cylinder 401 is activated, the extension rod drives the pressure rod to press down, thereby completing the positioning and clamping of the welded part.

[0033] The hot riveting mechanism 3 includes: a bracket 301 and a second cylinder 302. The bracket 301 is mounted on the support platform 1, and the second cylinder 302 is mounted on the bracket 301. The output end of the second cylinder 302 is provided with a riveting head 303.

[0034] In this embodiment, the riveting head 303 consists of a heating block and a heat insulation plate. The heating block is rapidly heated by external power supply, and the heat insulation plate is located at the end of the second cylinder 302 to prevent heat conduction from damaging the second cylinder 302.

[0035] The first point 204 and the second point 205 have a smooth transition structure, which facilitates the smooth rolling and positioning of the positioning wheel 2064 along the side wall of the cavity 203.

[0036] The working principle of this utility model is as follows:

[0037] In operation, the operator first places the welding components sequentially on their respective positions on the second disc 202 and rotates the second disc 202 to move each welding component into its corresponding position. Before welding, the first cylinder 401 retracts, driving the pressure rod assembly 402 to descend and press the welding components firmly in place. Subsequently, the second cylinder 302 actuates, driving the riveting head 303 to press vertically downward, completing pulse hot riveting welding at the welding point. During the rotation of the second disc 202, the rod 2063 extends and retracts accordingly due to the continuous change in the relative position between the end face of the cavity 203 and the center of the disc. When the operator stops rotating the second disc 202, the positioning wheel 2064 automatically and stably falls into the second position 205, ensuring reliable alignment between the riveting head 303 and the welding point of the welding component, thus ensuring subsequent welding accuracy and efficiency.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic pulse welding device, characterized in that: The device includes a support platform with a workstation disc on the support platform. The workstation disc has several hot riveting mechanisms arranged circumferentially on its surface. The workstation disc includes: a first disc body disposed on the support platform; a second disc body coaxially and rotatably connected to the first disc body, the second disc body having a cavity, and multiple first points and multiple second points alternately arranged circumferentially on the sidewall of the cavity, the first points being located away from the center of the cavity, and the second points being located near the center of the cavity; and a positioning mechanism disposed on the first disc body, the positioning mechanism having a positioning end and used to automatically adjust to the first point position when the positioning end is not at the first point position.

2. The automatic pulse welding device according to claim 1, characterized in that: The positioning mechanism includes: a housing disposed on the first disc, and a spring element disposed inside the housing; a rod slidably connected to the housing, one end of the rod abutting against the spring element, and the other end being provided with a positioning wheel, the positioning wheel serving as the positioning end for positioning in conjunction with the first point.

3. The automatic pulse welding device according to claim 1, characterized in that: The workstation disc is provided with a fixing mechanism for fixing the welded parts; the positioning mechanism includes: a plurality of first cylinders, the first cylinders being disposed on the first disc body; and a pressure rod assembly, the pressure rod assembly being disposed at the output end of the first cylinders, for applying a clamping force to the welded parts during the welding process.

4. The automatic pulse welding device according to claim 1, characterized in that: The hot riveting mechanism includes: a bracket, which is mounted on the support platform; and a second cylinder, which is mounted on the bracket, with a riveting head at its output end.

5. An automatic pulse welding device according to claim 1, characterized in that: The transition between the first point and the second point is smooth.

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