Multifunctional SMT patch welding auxiliary jig

Abstract

The utility model discloses a kind of multifunctional SMT patch welding auxiliary jig, it is related to electronic manufacturing auxiliary equipment technical field, including jig main body, the upper end of jig main body is passed and is opened with square hole, the both ends of jig main body are passed and are opened with a long hole, the both sides of jig main body are passed and are opened with two long holes.The utility model, by the precision transmission of a screw rod and second screw rod, the position of slide long block and long frame seat can be accurately adjusted, combined with the reference positioning effect of triangular positioning block, meet the welding demand of BGA, CSP and other precision packaging components, simultaneously, second short limiting block can be realized self-adapting clamping under the action of supporting spring, cooperate with the sliding adjustment of slide long block and long frame seat, can be adapted to different size, different shape PCB board, without replacing special jig, reduce equipment cost, shorten production switching time, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electronic manufacturing auxiliary equipment technology, and in particular to a multifunctional SMT chip soldering auxiliary fixture. Background Technology

[0002] In the electronics manufacturing industry, surface mount technology (SMT) has become the mainstream circuit assembly process due to its advantages of high assembly density, high reliability, and high production efficiency. As electronic products continue to develop towards miniaturization, high performance, and multi-functionality, extremely stringent requirements are placed on the quality of SMT surface mount soldering. Among these requirements, precise PCB board positioning, precise temperature control during the soldering process, and a stable supply of solder have become key factors determining the soldering quality.

[0003] However, in existing technologies, most traditional fixtures are custom-made for PCBs of specific sizes and models, resulting in extremely poor versatility. When electronics manufacturers need to switch product models and produce PCBs of different sizes, they have to redesign and manufacture special fixtures. This process not only consumes a lot of time and money, but the fixture design and mold making cycle usually takes several days to several weeks, which also leads to long periods of idle production equipment and seriously affects production progress. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing a multifunctional SMT chip soldering auxiliary fixture.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a multifunctional SMT surface mount soldering auxiliary fixture, comprising a fixture body, a square hole penetrating through the upper end of the fixture body, a first elongated hole penetrating through both ends of the fixture body, and a second elongated hole penetrating through both sides of the fixture body. A long frame seat is slidably installed inside the two sets of second elongated holes, and a square block is slidably installed inside the two sets of first elongated holes. A sliding block is installed between the two sets of square blocks. A long limiting block is installed at the upper end of the long frame seat, and a first short limiting block is installed at the upper end of the sliding block. The upper end of the sliding block is slidably fitted with a second short limiting block. A triangular positioning block is installed in one corner of the square hole. A support spring is installed inside the first short limiting block. The inner walls of the long limiting block, the first short limiting block, the second short limiting block, and the triangular positioning block are all fitted with silicone pads of corresponding sizes. A first screw is rotatably installed inside the first long hole of one set, and a part of the first screw penetrates to one side of the fixture body. A second screw is rotatably installed inside the second long hole of one set, and a part of the second screw penetrates to the outer wall of the fixture body.

[0006] Preferably, a portion of the sliding block is slidably disposed inside the long frame seat, and the other end of the support spring is fixed to the inner wall of the second short limiting block.

[0007] Preferably, the interior of the long frame seat is threadedly connected to the outer wall of the second screw, and the interior of one set of the blocks is threadedly connected to the outer wall of the first screw.

[0008] Preferably, a guide cylinder is installed through one end of the first short limiting block, and a guide rod is provided inside the support spring.

[0009] Preferably, one end of the guide rod is fixed to the inner wall of the second short limiting block, and a portion of the guide rod is slidably inserted into the inside of the guide cylinder.

[0010] Preferably, a tin sheet L-shaped bracket is installed on the other side of the fixture body, and a detachable heat dissipation component is installed at the lower end of the fixture body.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. This utility model features high positioning accuracy and strong adaptability: Through the precise transmission of screws No. 1 and No. 2, the positions of the sliding block and the long frame seat can be accurately adjusted. Combined with the reference positioning function of the triangular positioning block, it meets the welding requirements of precision packaged components such as BGA and CSP. At the same time, the second short limiting block can achieve adaptive clamping under the action of the support spring. With the sliding adjustment of the sliding block and the long frame seat, it can adapt to PCB boards of different sizes and shapes without the need to change special fixtures, reducing equipment costs, shortening production changeover time, and improving production efficiency.

[0012] 2. In this utility model, the PCB board protection effect is good: the silicone pads on the inner walls of the long limiting block, the first short limiting block, and the second short limiting block can effectively prevent the PCB board from directly contacting the metal limiting block and prevent scratches on the edge of the board; and the elasticity of the silicone pads can make the limiting block fit tightly with the PCB board, ensuring the fixing effect while avoiding deformation of the PCB board due to excessive clamping force. It is especially suitable for soldering operations of thin PCB boards and improves product yield. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of a multifunctional SMT surface mount soldering auxiliary fixture is provided for this utility model; Figure 2 This utility model provides a schematic diagram of the main structure of a multifunctional SMT surface mount soldering auxiliary fixture; Figure 3 This utility model provides an exploded structural diagram of a multifunctional SMT surface mount soldering auxiliary fixture, comprising a sliding block, a second short limiting block, and a guide rod. Figure 4This utility model presents a front structural diagram of a multifunctional SMT surface mount soldering auxiliary fixture.

[0014] Legend: 1. L-shaped bracket for tin sheet; 2. Main body of fixture; 3. Heat dissipation component; 4. Square hole; 5. Long frame base; 6. Sliding block; 7. Square block; 8. Long limiting block; 9. First short limiting block; 10. Second short limiting block; 11. Triangular positioning block; 12. Silicone pad; 13. Support spring; 14. First long hole; 15. Second long hole; 16. First screw; 17. Second screw; 18. Guide cylinder; 19. Guide rod. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0017] Example 1: As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this utility model provides a multifunctional SMT surface mount soldering auxiliary fixture, including a fixture body 2. A square hole 4 is formed through the upper end of the fixture body 2. First elongated holes 14 are formed through both ends of the fixture body 2. Second elongated holes 15 are formed through both sides of the fixture body 2. Long frame seats 5 are slidably installed inside the two sets of second elongated holes 15. Square blocks 7 are slidably installed inside the two sets of first elongated holes 14. A sliding block 6 is installed between the two sets of square blocks 7. A long limiting block 8 is installed at the upper end of the long frame seat 5. A first short limiting block 9 is installed at the upper end of the sliding block 6. A second short limiting block 10 is slidably installed at the upper end of the sliding block 6. A triangular positioning block 11 is installed in one corner inside the square hole 4. A triangular positioning block 11 is installed inside the first short limiting block 9. The inner walls of the supporting spring 13, the long limiting block 8, the first short limiting block 9, the second short limiting block 10, and the triangular positioning block 11 are all equipped with silicone pads 12 of corresponding sizes. A first screw 16 is rotatably installed inside a set of first long holes 14, and a part of the first screw 16 extends through to one side of the fixture body 2. A second screw 17 is rotatably installed inside a set of second long holes 15, and a part of the second screw 17 extends through to the outer wall of the fixture body 2. A part of the sliding block 6 is slidably disposed inside the long frame seat 5. The other end of the supporting spring 13 is fixed to the inner wall of the second short limiting block 10. The interior of the long frame seat 5 is threadedly connected to the outer wall of the second screw 17. The interior of a set of square blocks 7 is threadedly connected to the outer wall of the first screw 16.

[0018] The specific settings and functions of this embodiment will be described in detail below. The fixture body 2, as the basic support component of the entire auxiliary fixture, is made of high-temperature resistant synthetic stone material. This material can withstand temperatures above 260°C, is not easily deformed after repeated use, and can adapt to the high-temperature environment of the SMT surface mount soldering process. Key openings: A square hole 4 is provided through the center of the upper end face of the fixture body 2. The square hole 4 provides a dedicated space for the placement and soldering of the PCB board, and facilitates the dissipation of heat during the soldering process and the airflow circulation of the subsequent heat dissipation component 3. A triangular positioning block 11 is fixedly installed in one corner of the square hole 4 (preferably the corner closer to the operator). The triangular positioning block 11 is made of aluminum alloy and its surface is precision polished. Its right-angled edge fits into the inner wall of the square hole 4 to form a reference point for PCB board positioning, which can quickly perform preliminary positioning of the PCB board and improve positioning efficiency.

[0019] Both ends (along the length direction) of the fixture body 2 have a first elongated hole 14, and the two sets of first elongated holes 14 are symmetrically distributed and connected to the square hole 4. A square block 7 is slidably installed inside the first elongated hole 14. The square block 7 is made of wear-resistant engineering plastic, and its outer wall fits tightly against the inner wall of the first elongated hole 14, with low sliding resistance and not easy to shake. A sliding block 6 is fixedly installed between the two sets of square blocks 7. The sliding block 6 is made of aluminum alloy, and its length is adapted to the width of the square hole 4. Its lower end is detachably connected to the square block 7 by bolts. For easy maintenance and replacement later, a No. 1 screw 16 is rotatably installed inside one of the No. 1 long holes 14. The No. 1 screw 16 is made of stainless steel and has precision threads on its surface. One end of it is rotatably connected to the inner wall of the No. 1 long hole 14 through a bearing, and the other end passes through to one side of the fixture body 2 and is equipped with a knob. The threaded section of the No. 1 screw 16 is connected to the internal thread of the corresponding side block 7. By rotating the knob, the No. 1 screw 16 can be rotated, which can drive the block 7 to slide along the No. 1 long hole 14, thereby driving the sliding block 6 to move synchronously.

[0020] Two elongated holes 15 are provided on both sides (both sides along the width direction) of the fixture body 2. The two sets of elongated holes 15 are symmetrically distributed and connected to the square hole 4. An elongated frame seat 5 is slidably installed inside the two sets of elongated holes 15. The elongated frame seat 5 is a U-shaped aluminum alloy frame structure. Its inner wall is slidably engaged with the outer wall of the sliding block 6. A part of the sliding block 6 can be slidably inserted into the interior of the elongated frame seat 5 to form a cross sliding structure to ensure the stability of the sliding block 6 when it moves. A second screw 17 is rotatably installed inside one set of elongated holes 15. The material and structure of the second screw 17 are the same as the first screw 16. One end of the screw 17 is rotatably connected to the inner wall of the second elongated hole 15, and the other end passes through to the outer wall of the fixture body 2 and is fitted with a knob. The threaded section of the second screw 17 is connected to the internal thread of the corresponding side elongated frame seat 5. Rotating the knob can drive the elongated frame seat 5 to slide along the elongated hole 15.

[0021] Positioning component: A long limiting block 8 is fixedly installed on the upper end face of the long frame base 5 by bolts. The long limiting block 8 is made of aluminum alloy and its length is adapted to the length of the long frame base 5. A silicone pad 12 of the corresponding size is pasted on the inner wall of the long limiting block 8. The silicone pad is made of high temperature resistant and high elasticity silicone material, which can not only avoid the PCB board edge from directly contacting the long limiting block 8 and causing scratches, but also tightly fit the PCB board through its own elasticity, enhance the fixing stability, and prevent the PCB board from shifting during the soldering process.

[0022] A first short limiting block 9 is fixedly installed on the upper end face of the sliding block 6. The first short limiting block 9 is made of aluminum alloy and has the same height as the long limiting block 8. One side of it is aligned with the end of the sliding block 6. A second short limiting block 10 is also slidably installed on the upper end face of the sliding block 6. The second short limiting block 10 has a similar structure to the first short limiting block 9. The two are arranged opposite each other to form a clamping structure for the PCB board. An installation cavity is opened inside the first short limiting block 9. A support spring 13 is fixedly installed inside the installation cavity. The support spring 13 is made of stainless steel and has good elastic recovery performance. Its other end is fixedly connected to the inner wall of the second short limiting block 10. The elastic force of the support spring 13 can push the second short limiting block 10 to move towards the first short limiting block 9, thereby realizing... The device features adaptive clamping for PCBs of varying widths. A guide cylinder 18, made of stainless steel, is installed through one end of the first short limiting block 9 and is fixedly connected to the first short limiting block 9. A guide rod 19, also made of stainless steel, is installed inside the support spring 13. One end of the guide rod 19 is fixedly connected to the inner wall of the second short limiting block 10, while the other end slides into the guide cylinder 18. The cooperation between the guide cylinder 18 and the guide rod 19 prevents the support spring 13 from shifting or twisting during extension and retraction, ensuring that the second short limiting block 10 always slides in a straight line, thus improving positioning accuracy. Silicone pads 12 are also attached to the inner walls of both the first short limiting block 9 and the second short limiting block 10 to protect the PCB and enhance fixation.

[0023] Example 2: Figure 1 , Figure 3 and Figure 3 As shown, a guide cylinder 18 is installed through one end of the first short limiting block 9, and a guide rod 19 is provided inside the supporting spring 13. One end of the guide rod 19 is fixed to the inner wall of the second short limiting block 10, and a part of the guide rod 19 is slidably inserted into the inside of the guide cylinder 18. A tin sheet L-shaped frame 1 is installed on the other side of the fixture body 2, and a detachable heat dissipation component 3 is installed at the lower end of the fixture body 2.

[0024] The overall effect achieved by the embodiment is that the L-shaped bracket 1 is fixedly installed on the other side of the fixture body 2 (the side away from the knob of the first screw 16) by bolts. The L-shaped bracket 1 is made of aluminum alloy and consists of a horizontal section and a vertical section, which are attached and fixed to the side of the fixture body 2. Detachable heat dissipation component 3: The lower end of the fixture body 2 is detachably mounted with a snap-fit ​​structure. This component includes a heat dissipation shell, a miniature cooling fan, a temperature sensor, a control module, and a power interface. The heat dissipation shell is made of ABS engineering plastic and has multiple air inlets on its surface. It contains two 12V miniature cooling fans with a fan airflow of 60 CFM, which can generate a strong airflow. The temperature sensor is a DS18B20, which is installed on the side of the heat dissipation shell near the square hole 4. It can monitor the temperature of the soldering area in the square hole 4 in real time and transmit the temperature signal to the external control module (using an STM32F103 microcontroller). When the temperature exceeds the preset threshold (80℃), the control module automatically starts the miniature cooling fan. The airflow enters the square hole 4 through the ventilation hole at the lower end of the fixture body 2 (which is connected to the square hole 4) to provide directional heat dissipation for the soldered PCB board. When the temperature drops below 60℃, the fan automatically stops, realizing intelligent temperature control. The detachable design facilitates the maintenance, cleaning, or replacement of the heat dissipation component 3 in the future, extending the service life of the entire fixture.

[0025] The usage and working principle of this device are as follows: First, install the L-shaped bracket 1 of the solder sheet into the corresponding position on the welding equipment. Then, using the triangular positioning block 11 inside the square hole 4 as a reference, initially place the PCB board. Rotate the first screw 16 to drive the square block 7 to slide the sliding block 6 along the first long hole 14. Adjust the first short limit block 9 and the second short limit block 10 to the corresponding positions in the length direction of the PCB board. The support spring 13 pushes the second short limit block 10 to adaptively clamp the length of the PCB board. Then, rotate the second screw 17 to drive the long frame seat 5 to slide along the second long hole 15, so that the long limit block 8 fits against the edge in the width direction of the PCB board, completing the four-way precise fixation. The silicone pad 12 prevents scratches on the board and enhances stability. Finally, the PCB board is welded using the welding equipment.

[0026] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A multifunctional SMT patch welding auxiliary jig comprising a jig main body (2), characterized in that: The upper end of the fixture body (2) is provided with a square hole (4), both ends of the fixture body (2) are provided with a first elongated hole (14), and both sides of the fixture body (2) are provided with a second elongated hole (15). A long frame seat (5) is slidably installed inside the two sets of second elongated holes (15). A block (7) is slidably installed inside the two sets of first elongated holes (14). A sliding block (6) is installed in the middle of the two sets of blocks (7). A long limiting block (8) is installed at the upper end of the long frame seat (5). A first short limiting block (9) is installed at the upper end of the sliding block (6). A second short limiting block (10) is slidably installed at the upper end of the sliding block (6). A triangular positioning block (11) is installed in one corner of the square hole (4). A support spring (13) is installed inside the first short limiting block (9). The inner walls of the long limiting block (8), the first short limiting block (9), the second short limiting block (10) and the triangular positioning block (11) are all equipped with silicone pads (12) of the corresponding size. A screw (16) is rotatably installed inside the first long hole (14) of one set, and a part of the screw (16) penetrates to one side of the fixture body (2). A screw (17) is rotatably installed inside the second long hole (15) of one set, and a part of the screw (17) penetrates to the outer wall of the fixture body (2).

2. The multifunctional SMT surface mount soldering auxiliary fixture according to claim 1, characterized in that: A portion of the sliding block (6) is slidably disposed inside the long frame base (5), and the other end of the support spring (13) is fixed to the inner wall of the second short limiting block (10).

3. The multifunctional SMT surface mount soldering auxiliary fixture according to claim 2, characterized in that: The interior of the long frame seat (5) is threaded to the outer wall of the second screw (17), and the interior of one set of the blocks (7) is threaded to the outer wall of the first screw (16).

4. The multifunctional SMT surface mount soldering auxiliary fixture according to claim 1, characterized in that: One end of the first short limiting block (9) is fitted with a guide cylinder (18), and the inside of the support spring (13) is provided with a guide rod (19).

5. A multifunctional SMT surface mount soldering auxiliary fixture according to claim 4, characterized in that: One end of the guide rod (19) is fixed to the inner wall of the second short limiting block (10), and a part of the guide rod (19) is slidably inserted into the inside of the guide cylinder (18).

6. The multifunctional SMT surface mount soldering auxiliary fixture according to claim 1, characterized in that: A tin sheet L-shaped bracket (1) is installed on the other side of the fixture body (2), and a detachable heat dissipation component (3) is installed at the lower end of the fixture body (2).

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