A patch piezo-resistor welding discharge device

Abstract

The utility model belongs to patch pressure sensitive resistance packaging welding technical field discloses a kind of patch pressure sensitive resistance welding discharge devices, including carrier plate, ejection plate, the positioning needle for copper frame positioning is equipped on carrier plate, and the ejection hole corresponding with positioning needle position, and positioning hole, two positioning columns are equipped on ejection plate, and the material ejecting assembly corresponding with the number of positioning needle on carrier plate, positioning column is coniform, and mutually cooperate with the positioning hole on carrier plate, material ejecting assembly includes two ejector pins, two ejector pins of each material ejecting assembly symmetrically distribute in the two sides of corresponding positioning needle, and mutually cooperate with the ejection hole on carrier plate.The utility model two ejector pins of each material ejecting assembly symmetrically distribute in the two sides of positioning needle, copper frame is evenly stressed when jacking up, can effectively avoid the problems such as deformation, open welding, scratch caused by traditional blade prying or single ejector pin jacking up, significantly improve product yield, realize the rapid material taking of copper frame, improve work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of surface mount varistor packaging and welding technology, specifically relating to a surface mount varistor welding and unloading device. Background Technology

[0002] In the packaging process of surface-mount varistors, the soldering step requires first placing solder paste and the chip into a preset position within the copper frame. Then, the entire copper frame is placed on a carrier board. After the cover plate presses and positions the copper frame, it is sent into the soldering oven along with the carrier board to complete the soldering process. After soldering, the carrier board is removed from the oven opening. The operator removes the cover plate and then removes the copper frame from the carrier board for subsequent cleaning.

[0003] To ensure welding quality, the copper frame is typically positioned precisely using locating pins on the carrier plate, such as... Figure 1 The existing carrier plate shown has a positioning pin (1) and a receiving groove matching the preset position of the copper frame (2). Multiple positioning pins are distributed on both sides of the upper end of the carrier plate. Due to the thinness of the copper frame and the slight adhesion that may exist after welding, the copper frame is difficult to remove smoothly from the positioning pin (1) after welding. In the prior art, a blade is usually used to remove the material. The operator first pries up the side of the copper frame with the blade and then removes the entire copper frame. This method is not only inefficient, but also easily causes mechanical damage to the copper frame during the prying process, resulting in quality problems such as deformation of the copper frame, solder joint failure, and surface scratches, which seriously affects the product yield. Therefore, there is an urgent need to propose a chip varistor welding material removal device. By improving the structure of the carrier plate and using a top ejector plate to assist in material removal, this device can replace the traditional blade material removal method, solve its efficiency and quality defects, and improve the material removal efficiency. Utility Model Content

[0004] This invention addresses the shortcomings of the prior art by providing a chip varistor welding and unloading device.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A surface mount varistor welding and unloading device includes a carrier plate and an ejector plate. The carrier plate is provided with positioning pins for positioning a copper frame, ejector holes corresponding to the positions of the positioning pins, and positioning holes. The ejector plate is provided with two positioning posts and ejector components that correspond one-to-one with the number of positioning pins on the carrier plate. The positioning posts are conical and cooperate with the positioning holes on the carrier plate to achieve rapid and accurate positioning between the carrier plate and the ejector plate. The ejector components include two ejector pins, with the two ejector pins of each ejector component symmetrically distributed on both sides of the corresponding positioning pin and cooperating with the ejector holes on the carrier plate.

[0006] Preferably, the height of the ejector pin is greater than the sum of the depth of the ejector hole and the length of the positioning pin, so as to ensure that the copper frame is completely detached from the positioning pin.

[0007] Preferably, the two positioning holes are symmetrically distributed on both sides of the carrier plate to ensure positioning stability.

[0008] Preferably, the ejector plate is provided with six ejector components, with three ejector components forming a column, divided into column A and column B. The ejector components in column A are fixedly connected to the ejector plate, and the ejector components in column B are threadedly connected to the ejector plate.

[0009] Preferably, the ejector plate is provided with multiple rows of first preset holes for connecting with the B-column ejector assembly. The multiple rows of first preset holes are distributed at intervals along the width direction of the ejector plate. By adjusting the connection position of the B-column ejector assembly in the first preset holes, it can adapt to carrier plates of different widths.

[0010] Preferably, the positioning post is threadedly connected to the ejector plate, and the ejector plate is provided with a plurality of second preset holes for cooperating with the positioning post. The plurality of second preset holes are distributed at intervals along the width direction of the ejector plate to adapt to the positioning hole positions of carrier plates of different widths.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) In this utility model, the two ejector pins of each ejector assembly are symmetrically distributed on both sides of the positioning pin. When the ejector is lifted, the copper frame is subjected to uniform force, which can effectively avoid the problems of deformation, welding failure, and scratches caused by traditional blade prying or single ejector pin lifting, and significantly improve the product yield. (2) The height of the ejector pin of this utility model is greater than the sum of the depth of the ejector hole and the length of the positioning pin, which can ensure that the copper frame is completely detached from the positioning pin without the need for manual prying; at the same time, the conical positioning post achieves rapid positioning of the carrier plate and the ejector plate through the guiding effect, reducing calibration time and improving the overall efficiency of the material handling process. (3) The B-column top material assembly of this utility model is adjustable through multiple rows of first preset holes, and the positioning column is adjustable through multiple rows of second preset holes. It can be adapted to carrier plates of various widths and positioning hole positions, without the need to frequently replace the top plate, reducing equipment procurement and maintenance costs, and adapting to the production needs of multiple specifications of products. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the existing carrier plate. Figure 2 This is a schematic diagram of the carrier plate in Embodiment 1 of this utility model; Figure 3This is a schematic diagram of the ejector plate in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the structure of the ejector plate and auxiliary carrier plate in Embodiment 1 of this utility model to achieve material discharge; Figure 5 This is a schematic diagram of the carrier plate in Embodiment 2 of this utility model; Figure 6 This is a schematic diagram of the ejector plate in Embodiment 2 of this utility model; Figure 7 This is an exploded structural diagram of the ejector plate, the B-column ejector assembly, and the positioning column in Embodiment 2 of this utility model; Figure 8 This is a schematic diagram of the structure of the ejector plate and auxiliary carrier plate in Embodiment 2 of this utility model to achieve material discharge; In the figure: 1. Positioning pin, 2. Receiving groove, 3. Carrier plate, 301. Ejection hole, 302. Positioning hole, 4. Ejection plate, 5. Positioning post, 6. Ejector pin, 7. First preset hole, 8. Second preset hole. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] In the description of this utility model, it should be understood that the terms "middle", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 element 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.

[0016] Example 1 like Figure 1 and Figure 2As shown, a surface mount varistor welding and ejection device includes a carrier plate 3 and an ejector plate 4. The carrier plate has positioning pins 1 for positioning the copper frame, ejection holes 301 corresponding to the positions of the positioning pins, and positioning holes 302. The ejector plate has two positioning posts 5 and ejector components corresponding one-to-one with the number of positioning pins on the carrier plate. The positioning posts are conical and cooperate with the positioning holes on the carrier plate to achieve rapid and accurate positioning between the carrier plate and the ejector plate. The two positioning holes are symmetrically distributed on both sides of the carrier plate to ensure positioning stability. Inserting the tip of the positioning post into the positioning hole from the bottom of the carrier plate and moving the carrier plate downwards achieves automatic and accurate positioning. The ejector components include two ejector pins 6, with the two ejector pins of each ejector component symmetrically distributed on both sides of the corresponding positioning pin and cooperating with the ejection holes on the carrier plate. Figure 3 As shown, during operation, the carrier plate carrying the copper frame is placed on the ejector plate. Two ejector pins of each ejector assembly penetrate the ejector holes on the carrier plate, thereby lifting the copper frame from the carrier plate. The operation is simple and convenient, and it particularly solves the problem of removing the copper frame from the positioning pin. The height of the ejector pin is greater than the sum of the depth of the ejector hole and the length of the positioning pin to ensure that the copper frame is completely detached from the positioning pin. In this embodiment, the ejector plate has six ejector assemblies, arranged in rows of three. The ejector pins of each ejector assembly are fixed to or threadedly connected to the ejector plate. The threaded connection facilitates disassembly and replacement.

[0017] Example 2 Combination Figures 5 to 8 As shown, the difference between this embodiment and Embodiment 1 is that the specifications of the carrier plate have changed; its length remains the same, but its width has increased. To achieve the universality of the ejector plate and simultaneously adapt to the needs of these two different carrier plate specifications, in this embodiment, the ejector plate is provided with six ejector components, arranged in columns of three, divided into columns A and B. The ejector components in column A are fixedly connected to the ejector plate, while the ejector components in column B are threadedly connected to the ejector plate. The ejector plate has multiple rows of first preset holes 7 for connecting with the ejector components in column B. These multiple rows of first preset holes are spaced apart along the width direction of the ejector plate. By adjusting the connection position of the ejector components in column B through the first preset holes, it can adapt to carrier plates of different widths. Figure 5 The positioning pin is threadedly connected to the ejector plate, and the ejector plate is provided with multiple second preset holes 8 for engaging with the positioning pin. These multiple second preset holes are spaced apart along the width direction of the ejector plate to accommodate carrier plates of different widths. Figure 5 The positioning holes are located as follows. In this utility model, the positions of the first preset hole and the second preset hole can be freely set as needed to meet the usage requirements of various specific models and specifications of carrier plates (with the same length as existing carrier plates but different widths). In this embodiment, the first preset hole is provided in 3 rows, and the second preset hole is also provided in 3 rows, which shows that it can meet the usage requirements of three different width carrier plates.

[0018] Combining Embodiment 1 and Embodiment 2, the method of using this utility model is as follows: (1) Adjust the position of the B column ejector assembly on the ejector plate 4 according to the width of the carrier plate 3 so that the ejector pins 6 of the A column and B column ejector assemblies are matched with the ejector holes 301 on the carrier plate 3. (2) Adjust the position of the positioning post 5 on the ejector plate 4 so that it matches the position of the positioning hole 302 on the carrier plate 3; (3) When the carrier plate 3 carrying the copper frame is sent out from the furnace opening of the welding furnace, the cover plate is removed and the carrier plate 3 is placed on the ejector plate 4. The ejector pin 6 passes through the ejector hole 301 on the carrier plate, thereby lifting the copper frame from the carrier plate 3 and realizing the purpose of taking out the copper frame.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

Claims

1. A surface mount varistor welding and unloading device, comprising a carrier plate, characterized in that: It also includes an ejector plate; the carrier plate is provided with positioning pins for positioning the copper frame, ejector holes corresponding to the positions of the positioning pins, and positioning holes; the ejector plate is provided with two positioning posts and ejector components corresponding to the number of positioning pins on the carrier plate; the positioning posts are conical and cooperate with the positioning holes on the carrier plate; the ejector components include two ejector pins, the two ejector pins of each ejector component are symmetrically distributed on both sides of the corresponding positioning pin, and cooperate with the ejector holes on the carrier plate.

2. The surface mount varistor welding and unloading device as described in claim 1, characterized in that: The height of the ejector pin is greater than the sum of the depth of the ejector hole and the length of the positioning pin.

3. The surface mount varistor welding and unloading device as described in claim 1, characterized in that: The two positioning holes are symmetrically distributed on both sides of the carrier plate.

4. The surface mount varistor welding and unloading device as described in claim 1, characterized in that: The ejector plate is provided with six ejector components, with three ejector components forming a column, divided into column A and column B. The ejector components in column A are fixedly connected to the ejector plate, while the ejector components in column B are threadedly connected to the ejector plate.

5. The surface mount varistor welding and unloading device as described in claim 1, characterized in that: The ejector plate is provided with multiple rows of first preset holes for connecting with the B column ejector assembly, and the multiple rows of first preset holes are distributed at intervals along the width direction of the ejector plate.

6. The surface mount varistor welding and unloading device as described in claim 1, characterized in that: The positioning pin is threadedly connected to the ejector plate, and the ejector plate is provided with a plurality of second preset holes for cooperating with the positioning pin. The plurality of second preset holes are distributed at intervals along the width direction of the ejector plate.

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