Spot welding auxiliary device and spot welding system

Abstract

The utility model discloses a spot welding auxiliary device and a spot welding system, and belongs to the field of spot welding. The spot welding auxiliary device comprises a device body, two clamping arms used for clamping a to-be-welded body and fixing screws. A sliding rail is arranged on the device main body; a sliding block matched with the sliding rail is arranged on each clamping arm; the clamping arm moves on the device main body through the sliding block, so that the clamping arm conveniently clamps a to-be-welded main body and then moves to a specified position, and then the to-be-welded main body is fixed through matching of a screw hole, matched with a fixing screw, in the sliding block and the fixing screw; and the device main body is provided with the groove for placing the to-be-welded accessory, so that the position of the to-be-welded accessory is fixed. In this way, during welding, positioning is accurate, clamping is firm, spot welding quality is high, and production efficiency is high.

Description

A spot welding auxiliary device and spot welding system Technical Field

[0001] This utility model relates to the field of spot welding, and in particular, to a spot welding auxiliary device and a spot welding system. Background Technology

[0002] Film capacitors, cylindrical capacitors made by overlapping and winding metal foil or metal-plated electrodes with plastic films such as polyethylene, polypropylene, polystyrene, or polycarbonate, have become ideal for high-voltage, high-performance, and high-precision applications due to their high voltage resistance, long lifespan, and excellent temperature performance. They play a crucial role in various fields, including traditional lighting, home appliances, new energy vehicles, and photovoltaic and wind power generation.

[0003] In the production process, conducting various electrical performance tests (such as capacitance, insulation, loss tangent, and withstand voltage) on the semi-finished core is a crucial step. These tests help analyze problems in the production process and propose targeted solutions. Manual spot welding of the film capacitor core is one of the key steps in connecting the core to other components.

[0004] Manual spot welding is a flexible and adaptable resistance welding method suitable for small-batch, multi-variety production scenarios. In the production of film capacitors, manual spot welding is used to connect the core to the leads. Because film capacitor cores are typically small and vary in shape, the design of manual spot welding fixtures places high demands on their design. Traditional spot welding processes for film capacitor cores suffer from inaccurate positioning and unstable clamping, leading to inconsistent weld quality and low production efficiency. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a spot welding auxiliary device and spot welding system to solve the problems of inaccurate positioning and unstable clamping in the traditional spot welding process of thin film capacitor cores, which leads to unstable spot welding quality and low production efficiency.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] In a first aspect, a spot welding auxiliary device is provided, comprising: a device body, two clamping arms for clamping the body to be welded, and fixing screws;

[0008] The main body of the device is provided with a slide rail; each of the clamping arms is provided with a slider that cooperates with the slide rail; the clamping arms move on the main body of the device via the sliders;

[0009] The slider is provided with a screw hole that matches the fixing screw, and the fixing screw cooperates with the screw hole to fix the clamping arm to the main body of the device;

[0010] The main body of the device is provided with a groove for placing the parts to be welded.

[0011] As an optional implementation of this application, the device body is provided with scale lines, which are used to determine the distance of the clamping arm from the first axis of symmetry of the device body when the clamping arm is moved; so that when the two clamping arms are fixed on the device body, the distances of the two clamping arms from the first axis of symmetry of the device body are equal.

[0012] Wherein, the first axis of symmetry is perpendicular to the slide rail.

[0013] As an optional implementation of this application, the main body of the device is provided with at least two pairs of grooves;

[0014] Each pair of grooves includes two grooves, each for placing a component to be welded;

[0015] The line connecting any two grooves is parallel to the slide rail;

[0016] The two grooves in each pair of grooves are equidistant from the first axis of symmetry of the device body, which is perpendicular to the slide rail.

[0017] As an optional implementation of this application, the slide rail is located on the second axis of symmetry of the main body of the device;

[0018] The main body of the device is provided with two sets of grooves, which are symmetrical and the axis of symmetry is the slide rail.

[0019] Each set of grooves includes at least one pair of grooves, and each pair of grooves includes at least two grooves, each groove being used to place a fitting to be welded.

[0020] As an optional implementation of this application, the slide rail is provided with a slot, and the slider is provided with a protrusion that matches the slot;

[0021] When the protrusion is located within the slot, the slot restricts the slider within the slide rail.

[0022] As an optional implementation of this application, the slide rail is U-shaped, or the slider is trapezoidal.

[0023] As an optional implementation of this application, the fixing screw is located on the front of the device body, wherein the front of the device body is the side where the clamping arm is located;

[0024] When the clamping arm is fixed to the main body of the device, the fixing screw passes through the screw hole of the slider and contacts the slide rail.

[0025] As an optional implementation of this application, the slide rail is provided with an opening connecting the front and back of the device body, wherein the front of the device body is the side where the clamping arm is located;

[0026] The fixing screws are located on the back of the main body of the device;

[0027] The fixing screw is connected to the screw hole of the slider through the opening.

[0028] As an optional implementation of this application, the clamping arm is provided with a friction pad to make the clamping arm more securely clamp the body to be welded.

[0029] In a second aspect, a spot welding system is provided, comprising: a spot welding auxiliary device as described in any of the preceding claims.

[0030] The application employs the above technical solution and has at least the following beneficial effects:

[0031] This application provides a spot welding auxiliary device and a spot welding system. The spot welding auxiliary device includes a main body, two clamping arms for holding the body to be welded, and fixing screws. The main body is equipped with a slide rail; each clamping arm has a slider that mates with the slide rail. The clamping arm moves on the main body via the slider, facilitating the movement of the clamping arm to the designated position after clamping the body to be welded. Then, the body to be welded is fixed by the engagement of the screw holes on the sliders with the fixing screws. Furthermore, because the main body has grooves for placing the parts to be welded, the position of the parts is fixed. This results in accurate positioning, firm clamping, high spot welding quality, and high production efficiency during welding. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 is a structural schematic diagram of a traditional spot welding fixture provided in an embodiment of this utility model;

[0034] Figure 2 is a schematic diagram of the usage structure of a traditional spot welding fixture provided in an embodiment of this utility model;

[0035] Figure 3 is a schematic diagram of the overall structure of a spot welding auxiliary device provided in an embodiment of the present invention;

[0036] Figure 4 is an exploded view of a spot welding auxiliary device shown in Figure 3 provided in an embodiment of this utility model;

[0037] Figure 5 is a schematic diagram of the spot welding auxiliary device shown in Figure 3 during welding, provided by an embodiment of the present utility model.

[0038] Figure 6 is a front view of the main body of the spot welding auxiliary device shown in Figure 3, provided by an embodiment of the present invention;

[0039] Figure 7 is a side view of the main body of the spot welding auxiliary device shown in Figure 3, provided by an embodiment of the present invention;

[0040] Figure 8 is a top view of the main body of the spot welding auxiliary device shown in Figure 3, provided by an embodiment of the present utility model;

[0041] Figure 9 is a front view of the clamping arm in the spot welding auxiliary device shown in Figure 3, provided by an embodiment of the present invention;

[0042] Figure 10 is a side view of the clamping arm in the spot welding auxiliary device shown in Figure 3, provided by an embodiment of the present invention;

[0043] Figure 11 is a top view of the clamping arm in the spot welding auxiliary device shown in Figure 3 provided by an embodiment of the present invention;

[0044] Figure 12 is a schematic diagram of a slide rail with a concave shape provided in an embodiment of the present utility model;

[0045] Figure 13 is a schematic diagram of a trapezoidal slider provided in an embodiment of this utility model.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1-Main body of the device, 2-Clamping arm, 3-Fixing screw, 4-Slider, 5-Groove, 6-Scale line, 7-Slide rail, 8-Opening, 11-Main body to be welded, 12-Accessory to be welded, 13-Friction pad. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this utility model will be described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] As shown in Figures 1 and 2, in traditional manual spot welding fixtures, the core is placed inside the fixture during welding. However, since the core is not fixed, it is easy to move during welding. Furthermore, the size of the spot welding fixture is fixed; for cores of different sizes, either multiple spot welding fixtures are needed, or a larger fixture is used. For smaller cores, the core is prone to skew during spot welding, causing the lead pin to not be able to be spot welded to the correct position, resulting in difficulty in inserting the core into the shell.

[0050] To solve the above problems, referring to Figures 3, 4 and 5, this utility model embodiment provides a spot welding auxiliary device, including: a device body 1, two clamping arms 2 for clamping the body 11 to be welded, and fixing screws 3;

[0051] The main body 1 of the device is provided with a slide rail 7; each clamping arm 2 is provided with a slider 4 that cooperates with the slide rail 7; the clamping arm 2 moves on the main body 1 of the device through the slider 4; this makes it convenient for the clamping arm 2 to clamp the body 11 to be welded and move it to the designated position, and regardless of the size of the body 11 to be welded, it can be matched with the body 11 to be welded by moving the clamping arm 2, without the need to set up multiple tooling for different sizes of the body 11 to be welded.

[0052] The slider 4 is provided with a screw hole that matches the fixing screw 3. The fixing screw 3 cooperates with the screw hole to fix the clamping arm 2 on the device body 1.

[0053] The main body 1 of the device is provided with grooves 5 for placing the parts to be welded 12, with one part 12 placed in each groove 5. The main body 11 to be welded is fixed in the designated position by the engagement of the screw holes on the slider 4 with the fixing screws 3. As long as the grooves 5 are set in the appropriate positions, the positions of the main body 11 and the parts 12 to be welded can be guaranteed to be fixed, accurately positioned, and firmly clamped. This results in high spot welding quality and high production efficiency when welding the parts 12 to the main body 11.

[0054] It should be noted that the product design includes 6-pin, 4-pin, and 2-pin products. When spot welding a 6-pin product, three pins need to be spot welded to one side of the core, one of which needs to be centered (i.e., on the first axis of symmetry of the device body) to meet customer requirements. Therefore, in this embodiment, the device body needs to have a centered, separate groove. When spot welding a 2-pin product, one pin needs to be spot welded to one side of the core, and the pin also needs to be centered to ensure the aesthetics of the product. Therefore, the main body will have a centered, separate groove.

[0055] As a preferred implementation of this application, the main body 1 of the device is rectangular, as shown in Figures 6, 7 and 8. The directions therein are defined below, wherein the slide rail 7 is set to the left and right.

[0056] Preferably, the main body 11 to be welded is a capacitor core, and the accessory 12 to be welded is a lead pin. Generally, the capacitor core is cylindrical or elliptical. During spot welding, two lead pins need to be evenly welded onto the capacitor core, with the distance from the two lead pins to a center line of the capacitor core being the same. Therefore, measurement is required when fixing the capacitor core onto the main body 1 of the device.

[0057] In one embodiment, personnel use a ruler to make the measurement. However, this increases labor costs and requires additional rulers.

[0058] Therefore, in another embodiment, the present application embodiment provides a scale line 6 on the device body 1. The scale line 6 is used to determine the distance of the clamping arm 2 from the first axis of symmetry of the device body 1 when the clamping arm 2 is moved; so that when the two clamping arms 2 are fixed on the device body 1, the distances of the two clamping arms 2 from the first axis of symmetry of the device body 1 are equal.

[0059] The first axis of symmetry is perpendicular to the slide rail 7. It should be noted that the scale line 6 is also symmetrical, and its axis of symmetry is the first axis of symmetry.

[0060] Traditional spot welding fixtures have fixed pin positions. When two pins need to be at different distances, additional spot welding fixtures are required, increasing costs. Therefore, in this embodiment, the device body 1 is provided with at least two pairs of grooves 5.

[0061] Each pair of grooves 5 includes two grooves 5, each for placing a component 12 to be welded;

[0062] The line connecting any two grooves 5 is parallel to the slide rail 7;

[0063] The distances from the two grooves 5 of each pair of grooves 5 to the first axis of symmetry of the device body 1 are equal, and the first axis of symmetry is perpendicular to the slide rail 7.

[0064] In this embodiment, multiple pairs of grooves 5 are provided. When different distances are required, grooves 5 with different distances can be provided, without the need for multiple spot welding fixtures.

[0065] In one embodiment, the scale line 6 and groove 5 mentioned in the above embodiment are only provided on one side of the device body 1, such as the upper side. During spot welding, pins need to be welded to both the top and bottom of the capacitor core. Therefore, after welding one side of the capacitor core, the fixing screw 3 is loosened, the capacitor core is removed, rotated, and then re-fixed before welding.

[0066] In another embodiment, the slide rail 7 is located on the second axis of symmetry of the device body 1;

[0067] The main body 1 of the device is provided with two sets of grooves 5, which are symmetrical, with the slide rail 7 as the axis of symmetry.

[0068] Each set of grooves 5 includes at least one pair of grooves 5, each pair of grooves 5 includes at least two grooves 5, and each groove 5 is used to place a fitting 12 to be welded.

[0069] In this embodiment, the groove 5 is provided on both the upper and lower sides. This means that after welding one side, it is not necessary to remove the capacitor core; instead, the capacitor can be directly rotated up and down to weld the other side. This saves steps and speeds up the welding process.

[0070] It is understandable that, during fixation, the capacitor core can be ensured to be in the center position simply by following the scale line 6 on one side. Therefore, the scale line 6 can be set only on one side of the device body 1. Alternatively, the device body 1 can have two sets of scale lines 6, which are symmetrical, with the slide rail 7 as the axis of symmetry. With two sets of scale lines 6, it is not necessary to deliberately search for the side where the scale line 6 is located when moving the capacitor core.

[0071] Furthermore, when the friction between the clamping arm 2 and the capacitor core is insufficient, the capacitor core may become loose, resulting in poor welding quality. Therefore, to ensure sufficient friction between the clamping arm 2 and the capacitor core, as shown in Figures 9, 10, and 11, a friction pad is provided on the clamping arm 2 to more firmly clamp the body 11 to be welded. For example, the friction pad 13 is a silicone pad or a rubber pad.

[0072] In one embodiment, the slide rail 7 has an opening 8 that connects the front and back of the device body 1, wherein the front of the device body 1 is the side where the clamping arm 2 is located.

[0073] The fixing screw 3 is located on the back of the main body 1 of the device;

[0074] The fixing screw 3 is connected to the screw hole of the slider 4 through the opening 8.

[0075] In this embodiment, as shown in Figure 7, when the slider 4 moves on the slide rail 7, the fixing screw 3 needs to be connected to the screw hole but not tightened. This is because if the fixing screw 3 is not connected to the screw hole, the slider 4 may fall off the slide rail 7 under the action of the clamping arm 2. When the clamping arm 2 needs to be fixed to the main body 1 of the device, the fixing screw 3 is tightened.

[0076] In another embodiment, the slide rail 7 is provided with a slot, and the slider 4 is provided with a protrusion that matches the slot;

[0077] When the protrusion is located within the slot, the slot restricts the slider 4 within the slide rail 7. In use, the slider 4 enters from both sides of the slide rail 7 and can only move left and right within it. This prevents the slider 4 from detaching from the slide rail 7 even without the fixing screws 3. Of course, if fixing is required, the fixing screws 3 must connect to the screw holes on the slider 4 to prevent the slider 4 from moving left and right within the slide rail 7.

[0078] In one embodiment, as shown in Figure 12, the slide rail 7 is concave. It can be understood that the slider 4 is shaped to match the slide rail 7, i.e., the slider 4 is convex. In this case, the two sides of the concave shape are the grooves described above, while the upper side of the convex shape is a protrusion.

[0079] In another embodiment, as shown in FIG13, the slider 4 is trapezoidal, and it can be understood that the shape of the slide rail 7 matches the slider 4.

[0080] When using slots and protrusions, the opening 8 does not need to be provided in the slide rail 7 of the device body 1. When connecting, the fixing screw 3 is located on the front of the device body 1, wherein the front of the device body 1 is the side where the clamping arm 2 is located.

[0081] When the clamping arm 2 is fixed to the main body 1 of the device, the fixing screw 3 passes through the screw hole of the slider 4 and contacts the slide rail 7.

[0082] The following is a specific implementation example using welding leads to a capacitor core: The spot welding auxiliary fixture includes: a main body made of 304 stainless steel, which serves as the main structure supporting the entire spot welding fixture and is a symmetrical structure in all directions; a groove on the main body of the spot welding fixture, used to feed the leads during spot welding, with three common lead spacing grooves; a scale line on the main body of the spot welding fixture, used to position the left and right clamping arms during spot welding to ensure the capacitor core is centered; fixing screws, serving as connectors between the two clamping arms and the main body of the fixture, used to fix the clamping arms and the capacitor core; a slide rail on the main body of the spot welding fixture, providing a path for the left and right movement and fixation of the clamping arms; clamping arms made of 304 stainless steel, serving as fixing components for clamping the capacitor core; and a silicone pad, serving as an auxiliary component for clamping the capacitor core, which increases the friction between the clamping arms and the capacitor core, achieving stable clamping.

[0083] Instructions for use: Place the capacitor core between the two clamping arms. Move the left and right clamping arms until they align with the capacitor core. Following the scale lines on the main body of the device, move the left and right clamping arms the same distance. Connect and secure the clamping arms to the spot welding fixture body using the fixing screws. Pass the lead pin through the groove and perform the spot welding operation. After one side of the capacitor core is spot welded, there is no need to remove and flip the core. Instead, flip the entire spot welding auxiliary device over and perform spot welding again. This allows for rapid spot welding of individual capacitor cores, improving production efficiency.

[0084] Based on the same inventive concept, this application provides a spot welding system, including: a spot welding auxiliary device as provided in any of the above embodiments. Automatic spot welding is achieved through a robotic arm and a driving device. The robotic arm is used to move the capacitor core and the lead pin, and to flip the spot welding auxiliary device. The driving device is used to move the slider and the fixing screw to move and fix the capacitor core. Additionally, there is a detection device and an automatic spot welding device. The detection device is used to detect whether the capacitor core is in position, etc., and the automatic spot welding device is used to automatically spot weld after the capacitor core is in position. Automatic spot welding is achieved through the cooperation of these devices. The placement of each device is set according to actual needs, and this application does not impose specific limitations.

[0085] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0086] It should be noted that in the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means at least two.

[0087] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0088] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0089] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0090] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0091] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A spot welding auxiliary device, characterized in that, include: The device includes a main body, two clamping arms for holding the body to be welded, and a fixing screw; the main body is provided with a slide rail; each clamping arm is provided with a slider that cooperates with the slide rail; the clamping arm moves on the main body via the slider; the slider is provided with a screw hole that matches the fixing screw, and the fixing screw cooperates with the screw hole to fix the clamping arm on the main body; the main body is provided with a groove for placing the part to be welded.

2. The spot welding auxiliary device according to claim 1, characterized in that: The device body is provided with scale lines, which are used to determine the distance from the clamping arm to the first axis of symmetry of the device body when the clamping arm is moved; so that when the two clamping arms are fixed on the device body, the distances from the two clamping arms to the first axis of symmetry of the device body are equal; wherein, the first axis of symmetry is perpendicular to the slide rail.

3. The spot welding auxiliary device according to claim 1, characterized in that: The main body of the device is provided with at least two pairs of grooves; each pair of grooves includes two grooves, each used to place a component to be welded; the line connecting any two grooves is parallel to the slide rail; the distances from the two grooves of each pair of grooves to the first axis of symmetry of the main body of the device are equal, and the first axis of symmetry is perpendicular to the slide rail.

4. The spot welding auxiliary device according to claim 1, characterized in that: The slide rail is located on the second axis of symmetry of the main body of the device; the main body of the device is provided with two sets of grooves, the two sets of grooves are symmetrical, and the axis of symmetry is the slide rail; each set of grooves includes at least one pair of grooves, each pair of grooves includes at least two grooves, and each groove is used to place a component to be welded.

5. The spot welding auxiliary device according to claim 1, characterized in that: The slide rail is provided with a slot, and the slider is provided with a protrusion that matches the slot; when the protrusion is located in the slot, the slot restricts the slider within the slide rail.

6. The spot welding auxiliary device according to claim 5, characterized in that: The slide rail is U-shaped, or the slider is trapezoidal.

7. The spot welding auxiliary device according to claim 5, characterized in that: The fixing screw is located on the front of the device body, wherein the front of the device body is the side where the clamping arm is located; when the clamping arm is fixed to the device body, the fixing screw passes through the screw hole of the slider and contacts the slide rail.

8. The spot welding auxiliary device according to claim 1, characterized in that: The slide rail has an opening that connects the front and back of the device body, wherein the front of the device body is the side where the clamping arm is located; the fixing screw is located on the back of the device body; the fixing screw is connected to the screw hole of the slider through the opening.

9. The spot welding auxiliary device according to claim 1, characterized in that: The clamping arm is equipped with a friction pad to make the clamping arm more securely clamp the body to be welded.

10. A spot welding system, characterized in that, include: The spot welding auxiliary device as described in any one of claims 1-9.

Images