PCB furnace passing tool for preventing tin penetration defect

Abstract

This invention provides a PCB reflow fixture for preventing poor solder penetration, comprising: a fixture body, an installation groove within the fixture body, a placement groove on the bottom surface of the installation groove, a template placed within the placement groove, a retaining groove on the upper surface of the template, limiting grooves on opposite surfaces of the template, a movable groove on the inner wall of the placement groove on opposite surfaces, a spring on one side of the inner wall of the movable groove, a pull plate at one end of the spring, a limiting block on one side of the pull plate, a cover plate on the other side of the pull plate, and a guide groove on the inner wall of the movable groove on opposite surfaces. This invention allows the template to be removed from the placement groove by pulling the pull plate to both sides. The pull plate slides within the guide groove via the guide block, compressing the spring and simultaneously disengaging the limiting block from the limiting groove. This eliminates the need to replace the template itself, thus reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of reflow soldering fixtures, and in particular to a PCB reflow soldering fixture for preventing poor solder penetration. Background Technology

[0002] PCB reflow fixtures are a new type of PCB fixture designed for SMT (Surface Mount Technology) processing. They are suitable for various PCBs with SMD components on the solder side of the through-hole components. During the reflow process, the fixture helps to clamp the PCB, firmly fixing it in place for through-hole component processing. Using PCB reflow fixtures can improve production efficiency, reduce defective products, and ensure product quality and production benefits. In general, the PCB is first placed inside the reflow fixture and then fixed using its built-in locking structure before being placed into the equipment for processing.

[0003] According to the authorized publication number CN 222776399 U, a PCB thin board reflow fixture includes a base plate with a groove for placing the thin board. The groove contains a plurality of first limiting pins and elastic limiting components, which are respectively located near opposite sides within the groove. Each elastic limiting component includes a slider elastically engaged on the base plate and a second limiting pin disposed on the slider. The slider can slide relative to the base plate to move closer to or further away from the first limiting pins, and the thin board can be engaged with the first and second limiting pins. This invention, through the first limiting pins in the groove and the slidable elastic limiting component containing the second limiting pin, ensures precise positioning and fixation of the PCB thin board during placement, helping to maintain the stability and positional accuracy of the thin board during reflow, and reducing production defects caused by positional deviations.

[0004] The above-mentioned device can ensure that the PCB thin board is accurately positioned and fixed when placed. However, the existing solder reflow fixtures are all one fixture and one template, which can only be adapted to one type of PCB. Once a new PCB is replaced, a new solder reflow fixture must be produced, including the corresponding locking structure and other structures, which increases the cost and causes waste. It is also inconvenient for users to process different PCBs. Therefore, a PCB reflow fixture to prevent poor solder penetration is proposed. Utility Model Content

[0005] Based on this, it is necessary to address the technical problem that a PCB reflow fixture can only adapt to one type of PCB, requiring the complete reflow of a new fixture whenever a new PCB is installed. This solution provides a PCB reflow fixture to prevent poor solder penetration, comprising: a fixture body with a mounting groove inside; a placement groove on the bottom surface of the mounting groove; a template within the placement groove; a locking groove on the upper surface of the template; limit grooves on opposite surfaces of the template; a movable groove on opposite surfaces of the placement groove's inner wall; a spring on one side of the movable groove's inner wall; a pull plate at one end of the spring; a limit block on one side of the pull plate; and a cover plate on the other side of the pull plate. Guides are provided on opposite surfaces of the movable groove's inner wall. The tooling body has a guide block slidably connected within the guide groove. A sliding groove is symmetrically formed on the upper surface of the tooling body. A sliding block is slidably positioned within each of the two sets of sliding grooves. A threaded rod is provided on the upper surface of each sliding block. A fixing plate is inserted around the circumference of the threaded rod. A nut is inserted around the top circumference of the threaded rod. A crossbar is provided between the two sets of fixing plates. A sliding groove is formed on the upper surface of the crossbar. Two sets of sliding blocks are slidably connected within the sliding groove. A threaded rod is provided on the upper surface of each sliding block. A connecting plate is inserted around the circumference of the threaded rod. A nut is inserted around the top circumference of the threaded rod. A sliding rod is inserted on the upper surface of the connecting plate. A rubber block is provided at the bottom of the sliding rod. A spring is sleeved around the circumference of the sliding rod.

[0006] In one embodiment, a plurality of fixing rods are symmetrically arranged on the upper surface of the mounting groove. Rubber pressure blocks are inserted through the periphery of the fixing rods, and springs are sleeved on the periphery of the fixing rods. The shape and size of the sliding block one are adapted to the sliding groove one, and the sliding block one is slidably engaged with the sliding groove one. The periphery of the threaded rod is threadedly engaged with the nut one to adjust the clamping force of the fixing plate. The nut one is located above the fixing plate. Two sets of crossbars are provided. The shape and size of the sliding block two are adapted to the sliding groove two, and the sliding block two is slidably engaged with the sliding groove two. The periphery of the threaded rod two is threadedly engaged with the nut two to adjust the clamping force of the connecting plate.

[0007] In one embodiment, the rubber block is rotatably engaged with the peripheral side of the fixed rod, the top end of the third spring is fixedly connected to the top end of the fixed rod, the third spring is located above the rubber block, the limiting groove communicates with the movable groove, one side of the guide block is fixedly connected to one side of the pull plate, the limiting block is a trapezoidal plate structure, the connecting plate is slidably engaged with the slide rod, the second nut is located on one side above the connecting plate, the top end of the second spring is fixedly connected to the bottom surface of the connecting plate, and the bottom end of the second spring is fixedly connected to the upper surface of the rubber block.

[0008] In the above-mentioned PCB reflow fixture for preventing poor solder penetration, during operation, rotating nut one prevents it from pressing against the fixing plate, and then moving the crossbar to both sides through slide groove one until it is in a position that does not cover the template. Rotating nut two prevents it from pressing against the connecting plate, and simultaneously moving the connecting plate to both sides through slide groove two until it is in a position that does not cover the template. Then, pulling the pull plate to both sides causes it to slide in the guide groove through the guide block. The pull plate compresses spring one and simultaneously causes the limit block to disengage from the limit groove, thus allowing the template to be removed from the placement slot. Therefore, only the template needs to be replaced, instead of replacing the entire unit, thereby reducing costs. After the PCB is placed in the slot, rotating the rubber pressure block causes one end of the rubber pressure block to press against the side surface of the PCB for fixation. Then, moving the crossbar to the top of the PCB and pressing the PCB surface with the rubber block for fixation. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of a PCB reflow fixture for preventing poor solder penetration in one embodiment;

[0010] Figure 2 In one embodiment Figure 1 Enlarged view of section B;

[0011] Figure 3 In one embodiment Figure 1 Enlarged view of section C;

[0012] Figure 4 This is a right view of a PCB reflow fixture for preventing poor solder penetration in one embodiment;

[0013] Figure 5 In one embodiment Figure 4 Cross-sectional view of section AA;

[0014] Figure 6 In one embodiment Figure 5 Enlarged view of section D. Detailed Implementation

[0015] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model.

[0016] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0019] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0020] Please refer to the following: Figures 1 to 6 This utility model provides a PCB reflow fixture to prevent poor solder penetration, comprising: a fixture body 1, a mounting groove 10 inside the fixture body 1, a placement groove 101 inside the bottom surface of the mounting groove 10, a template 2 inside the placement groove 101, a slot 20 on the upper surface of the template 2, limit grooves 201 on opposite surfaces of the template 2, a movable groove 13 on opposite surfaces of the inner wall of the placement groove 101, a spring 130 on one side of the inner wall of the movable groove 13, and a pull plate 131 at one end of the spring 130. 31 has a limit block 132 on one side and a cover plate 133 on the other side of the pull plate 131. The inner wall of the movable groove 13 has guide grooves 134 on opposite surfaces. A guide block 135 is slidably connected in the guide groove 134. The upper surface of the tooling body 1 has symmetrical sliding grooves 102. Sliding blocks 103 slide in both sets of sliding grooves 102. A threaded rod 104 is provided on the upper surface of the sliding block 103. A fixing plate 106 is inserted through the periphery of the threaded rod 104. A nut 105 is inserted through the periphery of the top of the threaded rod 104.

[0021] Furthermore, a crossbar 11 is provided between the two sets of fixed plates 106. A second sliding groove 110 is provided on the upper surface of the crossbar 11. Two sets of sliding blocks 111 are slidably connected in the second sliding groove 110. A threaded rod 112 is provided on the upper surface of the second sliding block 111. A connecting plate 114 is inserted through the periphery of the threaded rod 112. A nut 113 is inserted through the periphery of the top of the threaded rod 112. A sliding rod 115 is inserted through the upper surface of the connecting plate 114. A rubber block 116 is provided at the bottom of the sliding rod 115. A spring 117 is sleeved on the periphery of the sliding rod 115.

[0022] Furthermore, several fixing rods 12 are symmetrically arranged on the upper surface of the mounting groove 10. Rubber pressure blocks 121 are inserted around the sides of the fixing rods 12. Springs 120 are sleeved on the sides of the fixing rods 12. The shape and size of the sliding block 103 are adapted to the sliding groove 102. The sliding block 103 slides with the sliding groove 102. The threaded rod 104 and the nut 105 adjust the clamping force of the fixing plate 106 through the threaded engagement. The nut 105 is located above the fixing plate 106.

[0023] Furthermore, the crossbar 11 is provided with two sets of sliding blocks 111, the shape and size of which are adapted to the sliding groove 110. The sliding blocks 111 and the sliding groove 110 slide in a sliding fit. The threaded rod 112 and the nut 113 adjust the clamping force of the connecting plate 114 through the threaded fit.

[0024] Furthermore, the rubber pressure block 121 is rotatably engaged with the side of the fixed rod 12, the top of the spring 120 is fixedly connected to the top of the fixed rod 12, the spring 120 is located above the rubber pressure block 121, the shape and size of the placement groove 101 are adapted to the template 2, the limiting groove 201 communicates with the movable groove 13, one side of the guide block 135 is fixedly connected to one side of the pull plate 131, and the limiting block 132 is a trapezoidal plate structure.

[0025] Furthermore, the connecting plate 114 and the slide rod 115 are in sliding engagement, the second nut 113 is set on one side above the connecting plate 114, the top of the second spring 117 is fixedly connected to the bottom surface of the connecting plate 114, and the bottom of the second spring 117 is fixedly connected to the upper surface of the rubber block 116.

[0026] It should be noted that, during the operation of the aforementioned PCB reflow fixture for preventing poor solder penetration, the following steps are taken: First, by rotating nut 105, the nut 105 is prevented from pressing against the fixing plate 106. Then, the crossbar 11 is moved to both sides via slide groove 102 until it no longer covers the template 2. Next, by rotating nut 113, the nut 113 is prevented from pressing against the connecting plate 114. Simultaneously, the connecting plate 114 is moved to both sides via slide groove 110 until it no longer covers the template 2. Finally, by pulling the pull plate 131 to both sides, the pull plate 131 is guided... Block 135 slides in guide groove 134, pull plate 131 squeezes spring 130, and at the same time drives limit block 132 to disengage from limit groove 201, so that template 2 can be removed from placement groove 101. Therefore, only template 2 needs to be replaced, and the whole system does not need to be replaced, thus reducing costs. After the PCB is placed in card slot 20, rotate rubber pressure block 121 so that one end of rubber pressure block 121 presses against the side surface of PCB for fixation. Then move crossbar 11 to move crossbar 11 above PCB, and press and fix PCB surface by rubber block 116.

[0027] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0028] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A PCB furnace tooling for preventing tin penetration defects, characterized by, include: The tooling body has an installation groove inside, a placement groove inside the bottom surface of the installation groove, a template inside the placement groove, a locking groove on the upper surface of the template, limit grooves on opposite surfaces of the template, a movable groove on opposite surfaces of the inner wall of the placement groove, a spring on one side of the inner wall of the movable groove, a pull plate on one end of the spring, a limit block on one side of the pull plate, and a cover plate on the other side of the pull plate, guide grooves on opposite surfaces of the inner wall of the movable groove, guide blocks slidably connected in the guide grooves, symmetrical sliding grooves on the upper surface of the tooling body, sliding blocks sliding in both sets of sliding grooves, a threaded rod on the upper surface of the sliding block, a fixing plate inserted around the circumference of the threaded rod, and a nut inserted around the top circumference of the threaded rod.

2. The PCB preventing tin penetration defect from passing through the furnace tooling according to claim 1, wherein, A crossbar is provided between the two sets of fixed plates. A second sliding groove is provided on the upper surface of the crossbar. Two sets of sliding blocks are slidably connected in the second sliding groove. A second threaded rod is provided on the upper surface of the second sliding block. A connecting plate is inserted through the periphery of the second threaded rod. A second nut is inserted through the periphery of the top of the second threaded rod. A sliding rod is inserted through the upper surface of the connecting plate. A rubber block is provided at the bottom of the sliding rod. A second spring is sleeved on the periphery of the sliding rod.

3. The PCB reflow fixture for preventing poor solder penetration according to claim 1, characterized in that, Several fixing rods are symmetrically arranged on the upper surface of the mounting groove. Rubber pressure blocks are inserted through the periphery of the fixing rods, and springs are sleeved on the periphery of the fixing rods.

4. The PCB reflow fixture for preventing poor solder penetration according to claim 1, characterized in that, The shape and size of the sliding block are adapted to the sliding groove, and the sliding block and the sliding groove slide together.

5. The PCB reflow fixture for preventing poor solder penetration according to claim 1, characterized in that, The threaded rod and nut 1 are connected by a thread to adjust the clamping force of the fixing plate. The nut 1 is located above the fixing plate.

6. The PCB reflow fixture for preventing poor solder penetration according to claim 2, characterized in that, The crossbar is provided in two sets. The shape and size of the second sliding block are adapted to the second sliding groove. The second sliding block and the second sliding groove are slidably engaged. The peripheral side of the second threaded rod and the second nut are engaged by the thread to adjust the clamping force of the connecting plate.

7. The PCB reflow fixture for preventing poor solder penetration according to claim 3, characterized in that, The rubber block is rotatably engaged with the circumferential side of the fixed rod, the top end of the spring is fixedly connected to the top end of the fixed rod, and the spring is located above the rubber block.

8. The PCB reflow fixture for preventing poor solder penetration according to claim 1, characterized in that, The shape and size of the placement groove are adapted to the template, the limiting groove is connected to the movable groove, one side of the guide block is fixedly connected to one side of the pull plate, and the limiting block is a trapezoidal plate structure.

9. The PCB reflow fixture for preventing poor solder penetration according to claim 6, characterized in that, The connecting plate and the slide rod are slidably engaged, and the second nut is located on one side above the connecting plate.

10. The PCB reflow fixture for preventing poor solder penetration according to claim 9, characterized in that, The top end of the second spring is fixedly connected to the bottom surface of the connecting plate, and the bottom end of the second spring is fixedly connected to the upper surface of the rubber block.

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