Capacitor cover copper foil anti-displacement welding device and its usage method

Abstract

This invention discloses a spot welding device for preventing copper foil misalignment in capacitor cover plates and its usage method, comprising: a base; an opening groove formed on the central axis of the base; a linear drive mechanism installed at one end of the base; a moving platform driven by the linear drive mechanism to move linearly on the base; a connecting part located at the end of the moving platform away from the linear drive mechanism; a swing arm, one end of which is located within the opening groove, and a sliding groove is formed at that end of the swing arm, with the connecting part slidingly engaging with the sliding groove; and a stop block fixedly connected to the other end of the swing arm. The beneficial effect of this invention is that, through a fully automatic method, the stop block blocks the copper foil before spot welding to prevent misalignment; simultaneously, during the downward pressing of the spot welding head, the stop block is pressed down along with the product to ensure no misalignment before spot welding and no misalignment during the spot welding process.

Description

Technical Field

[0001] This invention relates to the field of capacitor cover manufacturing, and more particularly to a copper foil spot welding device for capacitor covers and its usage method. Background Technology

[0002] Capacitor covers are widely used in the electrical appliance industry. Fully automated assembly and manufacturing technology offers advantages such as high capacity, stable quality, and labor savings. However, other manufacturers still rely on manual assembly for copper foil welding of capacitor covers. This includes manual labor for everything from welding two-prong and four-prong terminals to cardboard staples, to welding the cardboard staples to the copper foil, and assembling other components. Due to the inherent structural features of capacitor covers, a pressing process occurs during assembly and welding. During this process, the copper foil is prone to shifting, resulting in skewed or overlapping copper foil after welding. This reduces efficiency and leads to a high defect rate.

[0003] Chinese utility model patent publication number CN203471218U discloses a welding fixture for copper foil of power capacitors, including a handle. The handle comprises a cross-shaped bracket and four branch handles. The four ends of the cross-shaped bracket are respectively connected to one end of each of the four branch handles, and the other ends of the four branch handles intersect at a point. A fixing plate is fixed to the intersecting end of the four branch handles. A limiting plate is rotatably mounted on the fixing plate. Multiple threaded holes are formed on the limiting plate, and locking blocks are installed within these threaded holes. A locking groove is provided at the front end of each locking block. The shape of the limiting plate corresponds to the welding point of the cover plate to be welded. This welding fixture is still manually operated and cannot fundamentally solve the problem of copper foil easily shifting.

[0004] Chinese invention patent publication number CN109003842B discloses an automatic assembly device for capacitor end caps. The device includes a worktable equipped with a mold, and external terminal feeding units, insulating base feeding units, cover plate feeding units, and internal terminal assembly feeding units located beside the worktable. These units sequentially transport the external terminals, insulating bases, cover plates, and internal terminal assemblies to their corresponding positions in the mold in specific postures. A welding machine then welds the external terminals, insulating bases, cover plates, and internal terminal assemblies together as a single unit. This automatic assembly device primarily emphasizes the automatic connection between multiple processes and does not address the issue of misalignment during copper foil welding. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing copper foil spot welding process has high defects and low efficiency, and also increases assembly costs. To this end, a capacitor cover copper foil anti-displacement spot welding device and its usage method are provided.

[0006] The technical solution of the present invention is: a capacitor cover copper foil anti-displacement welding device, comprising: a base; an opening groove, the opening groove being formed on the central axis of the base; a linear drive mechanism, the linear drive mechanism being installed at one end of the base; a moving platform, the moving platform being driven by the linear drive mechanism to move linearly on the base; a connecting part; a swing arm, one end of the swing arm being located in the opening groove, the swing arm having a sliding groove at that end, the connecting part being slidably engaged with the sliding groove; and a stop block, the stop block being fixedly connected to the other end of the swing arm.

[0007] The linear drive mechanism described in the above scheme is a cylinder, which is connected to the moving platform via a piston rod.

[0008] An improvement to the above scheme is that it also includes a counterweight, and the other end of the swing arm is fixedly connected to the stop block through the counterweight.

[0009] The end of the stop block away from the base in the above scheme has at least one terminal that contacts the copper foil of the capacitor cover plate.

[0010] A further improvement to the above solution is that a limiting mechanism is fixedly connected to the side of the base. The limiting mechanism includes a column fixedly connected to the side of the base. Bolts distributed parallel to the length direction of the base are fixedly connected to the top of the column. The side of the moving platform is provided with an outwardly protruding boss. When the bolt contacts the boss, the moving platform will stop moving.

[0011] The method of using the anti-displacement spot welding device for copper foil on capacitor cover plate includes the following steps: (1) Install the base on the mounting block near the copper foil welding station of capacitor cover plate, so that the stop block is close to the capacitor cover plate; (2) Start the linear drive mechanism, the linear drive mechanism drives the moving platform to move towards the copper foil welding station of capacitor cover plate, the swing arm rotates, the stop block contacts the position of the copper foil to be placed on the capacitor cover plate, and the linear drive mechanism pauses; (3) Place the copper foil on the capacitor cover plate, the copper foil is blocked by the stop block to prevent the copper foil from displacement, spot weld the copper foil and press it down, the capacitor cover plate will move down accordingly, at this time the linear drive mechanism starts to continue to drive the stop block to move down, continuously prevent the copper foil from displacement during the process of the capacitor cover plate and copper foil moving down, until the spot welding is completed and the linear drive mechanism drives the stop block to rotate and rise.

[0012] The beneficial effect of this invention is that, in a fully automatic manner, a stop block is used to block the copper foil before spot welding to prevent it from shifting; at the same time, during the downward pressing of the spot welding head, the stop block is pressed down along with the product to ensure that it does not shift before spot welding and will not shift during spot welding. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the capacitor cover copper foil anti-displacement welding device of the present invention;

[0014] Figure 2This is a schematic diagram of the capacitor cover copper foil anti-displacement welding device of the present invention in use;

[0015] In the diagram, 1 is the base, 2 is the moving platform, 3 is the connecting part, 4 is the swing arm, 5 is the slide, 6 is the stop, 7 is the counterweight, 8 is the terminal, 9 is the column, 10 is the boss, 11 is the mounting block, and 12 is the capacitor cover. Detailed Implementation

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments implemented by those skilled in the art without creative effort are within the protection scope of the present invention.

[0017] A capacitor cover copper foil anti-displacement welding device includes: a base 1; an opening groove on the central axis of the base; a linear drive mechanism mounted on one end of the base; a moving platform 2 driven by the linear drive mechanism to move linearly on the base; a connecting part 3 located at the end of the moving platform away from the linear drive mechanism; a swing arm 4, one end of which is located in the opening groove, and a sliding groove 5 is provided at that end of the swing arm, with the connecting part slidingly engaging with the sliding groove; and a stop block 6 fixedly connected to the other end of the swing arm.

[0018] like Figure 1-2 As shown, the linear drive mechanism is a cylinder, which is connected to the moving platform via a piston rod. Of course, the linear drive mechanism can also be an electric drive system or a hydraulic drive system. The base is a rectangular mechanism with an opening slot on its central axis. This opening slot provides sufficient rotation space for the swing arm; therefore, the length, width, and depth of the opening slot are closely related to the swing arm and the angle at which it will rotate, and can be set as needed. The connecting part can be as follows... Figure 1 The double-arm structure shown can also be a single-arm structure, but a double-arm structure is preferred to ensure better stability of the swing arm. The swing arm is L-shaped or has other possible structures. One end of the swing arm swings within an open slot, and a sliding groove at this end slides into the connecting part, forming a fulcrum for movement. The posture of the swing arm is changed by moving this fulcrum. The free end of the stop has a contact part that contacts the copper foil on the capacitor cover plate, such as terminal 8. There can be one terminal, in which case one copper foil is soldered at a time; if there are two terminals as shown, then two copper foils are soldered at a time.

[0019] As a preferred embodiment of the present invention, it also includes a counterweight 7. The other end of the swing arm is fixedly connected to the stop block through the counterweight. The counterweight can provide weight to the stop block. By utilizing the gravity of the counterweight, it is ensured that the stop block is not easily detached when it comes into contact with the copper foil on the capacitor cover plate.

[0020] To ensure controllable swing amplitude of the swing arm, a limiting mechanism is fixedly connected to the side of the base. The limiting mechanism includes a column 9 fixedly connected to the side of the base, and bolts distributed parallel to the length direction of the base are fixedly connected to the top of the column. The side of the moving platform is provided with an outwardly protruding boss 10. When the bolt contacts the boss, the moving platform will stop moving. In the limiting mechanism, the bolt can be replaced by other rigid components, as long as they can prevent the moving platform from moving. It can be connected to the linear drive mechanism via a sensor. When the boss contacts the bolt or other rigid components, a signal is transmitted to the linear drive mechanism to stop it.

[0021] Based on the aforementioned limiting mechanism, another limiting mechanism can be set. For ease of distinction, these two limiting mechanisms can be referred to as the front limiting mechanism and the rear limiting mechanism. The front limiting mechanism consists of the column 9 and bolts mentioned above. The front limiting mechanism is used to limit the forward swing amplitude of the swing arm. The rear limiting mechanism has an inwardly contracting vertical opening on the side of the base near the linear drive mechanism. A vertical baffle is fixedly installed inside this opening. When the linear drive mechanism drives the swing arm to rotate, the boss will contact the baffle, at which point the linear drive mechanism stops.

[0022] The method of using the anti-displacement spot welding device for copper foil on capacitor cover plate includes the following steps: (1) Install the base on the mounting block 11 near the copper foil welding station of capacitor cover plate, so that the stop block is close to the capacitor cover plate 12; (2) Start the linear drive mechanism, the linear drive mechanism drives the moving platform to move towards the copper foil welding station of capacitor cover plate, the swing arm rotates, the stop block contacts the position of the copper foil to be placed on the capacitor cover plate, and the linear drive mechanism pauses; (3) Place the copper foil on the capacitor cover plate, the copper foil is blocked by the stop block to prevent the copper foil from displacement, spot weld the copper foil and press it down, the capacitor cover plate will move down accordingly, at this time the linear drive mechanism starts to continue to drive the stop block to move down, continuously prevent the copper foil from displacement during the process of the capacitor cover plate and copper foil moving down, until the spot welding is completed and the linear drive mechanism drives the stop block to rotate and rise.

Claims

1. A capacitor cover copper foil anti-displacement soldering device, characterized in that it includes: Base (1); An opening groove is formed on the central axis of the base; A linear drive mechanism is installed at one end of the base; a moving platform (2) is driven by the linear drive mechanism to move linearly on the base; a connecting part (3) is located at the end of the moving platform away from the linear drive mechanism; a swing arm (4) is located at one end of the swing arm in the opening groove, and the swing arm has a sliding groove (5) at this end, and the connecting part slides in cooperation with the sliding groove; a stop block (6) is fixedly connected to the other end of the swing arm.

2. The capacitor cover copper foil anti-displacement welding device as described in claim 1, characterized in that: The linear drive mechanism is a cylinder, which is connected to the moving platform via a piston rod.

3. The capacitor cover copper foil anti-displacement welding device as described in claim 1, characterized in that: It also includes a counterweight (7), and the other end of the swing arm is fixed to the stop block through the counterweight.

4. The capacitor cover copper foil anti-displacement welding device as described in claim 1, characterized in that: The end of the stop away from the base has at least one terminal (8) that contacts the copper foil of the capacitor cover plate (12).

5. The capacitor cover copper foil anti-displacement welding device as described in claim 1, characterized in that: The base is fixed to a limiting mechanism, which includes a column (9) fixed to the side of the base. The top of the column is fixed with bolts distributed parallel to the length direction of the base. The side of the moving platform is provided with an outwardly protruding boss (10). When the bolt contacts the boss, the moving platform will stop moving.

6. The method of using the capacitor cover copper foil anti-displacement welding device as described in any one of claims 1-5, characterized in that: Includes the following steps: (1) Install the base on the mounting block (11) near the copper foil welding station of the capacitor cover plate, so that the block is close to the capacitor cover plate; (2) Start the linear drive mechanism, the linear drive mechanism drives the moving platform to move towards the copper foil welding station of the capacitor cover plate, the swing arm rotates, the block contacts the position of the copper foil to be placed on the capacitor cover plate, and the linear drive mechanism pauses; (3) Place the copper foil on the capacitor cover plate, the copper foil is blocked by the block to prevent the copper foil from running away, spot weld the copper foil and press it down, the capacitor cover plate will move down accordingly, at this time the linear drive mechanism starts to continue to drive the block to move down, continuously prevent the copper foil from running away during the process of the capacitor cover plate and the copper foil moving down, until the spot welding is completed and the linear drive mechanism drives the block to rotate and rise.

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