Suspended limiting welding clamp suitable for MOS (Metal Oxide Semiconductor) tube

Abstract

The utility model discloses a suspension limit welding fixture suitable for MOS tubes, comprising a fixture body, the fixture body is provided with a first limit assembly used for positioning a circuit board and a second limit assembly used for positioning MOS tubes, and the second limit assembly comprises a height limit step arranged on the fixture body. The clamp body is detachably connected with a pressing strip on the height limiting step, and the MOS tube is clamped between the height limiting step and the pressing strip. According to the utility model, through the synergistic effect of the first limiting assembly and the second limiting assembly, the circuit board and the MOS tube are positioned, and the stability and accuracy of welding are ensured; the height limiting steps and the pressing strips ensure the suspension and height limiting requirements of the MOS tube, so that the welded MOS tube can keep good flatness. Compared with a manual welding jig, the fixture has the advantages that the positioning efficiency and the positioning precision of the MOS tube are improved, automatic welding can be carried out, the welding consistency is improved, the efficiency and the quality are improved, and the labor cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding fixtures, and more specifically, to a suspended limiting welding fixture suitable for MOS tubes. Background Art

[0002] like Figure 1 As shown, some power boards need to be plugged in and welded with multiple MOS tubes. There are two types of MOS tubes, which need to be suspended and limited and welded on the PCBA motherboard. The heights of the two MOS tube limits are inconsistent. After welding, the MOS tube has suspension, height limit, and flatness requirements. The height deviation is less than ±0.2mm. In addition, the front and back sides of the MOS tube pins need to be tinned sufficiently and full by more than 100%.

[0003] If there is a slight tolerance in the overall height of the MOS tube after welding, the entire MOS tube body cannot be 100% flat on the structure during structural assembly, which will not play a heat dissipation role, and there is a high probability that the MOS tube will be burned, causing quality accidents. The current hand welding fixture basically meets the requirements. Manual welding after the suspension limit lock is attached is very difficult. Manual work occasionally fails to meet the suspension height standard, which will lead to frequent rework and repeated repairs. The welding efficiency is low, and the customer delivery time cannot be met. A large amount of manpower and material resources are required, which increases labor costs.

[0004] The above shortcomings need to be improved. Summary of the invention

[0005] In order to solve the problem of low efficiency and poor stability when welding multiple MOS tubes with inconsistent welding height requirements using a hand welding jig, the utility model provides a suspended limiting welding fixture suitable for MOS tubes.

[0006] The technical solution of the utility model is as follows:

[0007] A welding fixture suitable for suspended limiting of MOS tubes comprises a fixture body, on which a first limiting component for positioning a circuit board and a second limiting component for positioning the MOS tube are arranged, wherein the second limiting component comprises a height limiting step arranged on the fixture body, and the fixture body is detachably connected with a pressure strip on the height limiting step, and the MOS tube is clamped between the height limiting step and the pressure strip.

[0008] The above-mentioned one is suitable for a MOS tube suspended limiting welding fixture, wherein the first limiting component includes a receiving groove arranged on the fixture body, and the length, width and depth of the receiving groove are respectively equivalent to the length, width and thickness of the circuit board.

[0009] Furthermore, a first positioning column is arranged in the accommodating groove, a first positioning hole corresponding to the first positioning column is arranged on the circuit board, and a nut is threadedly connected to the first positioning column.

[0010] Furthermore, the clamp body is rotatably connected with a pressing block on one side close to the receiving groove, and the pressing block is rotated to be placed above the receiving groove for pressing the circuit board, or is moved away from the receiving groove for loosening the circuit board.

[0011] Furthermore, a welding avoidance hole is provided in the accommodating groove, and the welding avoidance hole corresponds to the position of the MOS tube pin.

[0012] Furthermore, two material taking grooves are arranged on the edge of the containing groove, and the two material taking grooves are arranged opposite to each other.

[0013] The above-mentioned one is suitable for a MOS tube suspended limiting welding fixture, the fixture body is provided with a connecting column, the pressure strip is provided with a connecting hole corresponding to the connecting column, the connecting column passes through the connecting hole, and a nut is threadedly connected to the connecting column.

[0014] The above-mentioned one is suitable for a suspended position limiting welding fixture for a MOS tube, a second positioning column is arranged on the height limiting step, and a second positioning hole cooperating with the second positioning column is arranged on the MOS tube.

[0015] The above-mentioned one is suitable for a MOS tube suspended limiting welding fixture, and the fixture body is rotatably connected with an elastic clip near the height limiting step. The elastic clip is rotated to be placed above the pressure strip to press the pressure strip, or away from the pressure strip to loosen the pressure strip.

[0016] The above-mentioned one is suitable for a MOS tube suspended limiting welding fixture, and a pin height limiting strip is arranged between the circuit board and the MOS tube, and the pin height limiting strip is used to adjust the distance between the circuit board and the MOS tube.

[0017] The beneficial effect of the utility model according to the above scheme is that, through the synergistic effect of the first limit component and the second limit component, the fixture can realize the precise positioning of the circuit board and the MOS tube, ensuring the stability and accuracy during the welding process. The clamping method of the height-limiting step and the pressure strip ensures the suspension and height-limiting requirements of the MOS tube, so that the MOS tube after welding can maintain good flatness and meet the height offset requirements. Compared with the hand welding jig, the fixture improves the positioning efficiency and positioning accuracy of the MOS tube, and can be automatically welded by wave soldering equipment, which greatly improves the consistency of welding, greatly improves the efficiency and quality, and effectively reduces the labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a circuit board in the prior art;

[0020] Figure 2 It is a schematic diagram of the structure when the utility model is applied;

[0021] Figure 3 It is a schematic diagram of the top view structure of the height-limiting step in the utility model;

[0022] Figure 4 It is a front view structural schematic diagram of the height-limiting step in the utility model;

[0023] Figure 5 It is a structural schematic diagram of the layering strip in the utility model.

[0024] Among them, the figure marks in the figure are: 1. clamp body; 101. welding avoidance hole; 102. material taking groove; 2. first limiting component; 201. accommodating groove; 202. first positioning column; 203. pressing block; 3. second limiting component; 301. height limiting step; 302. pressing strip; 303. connecting column; 304. connecting hole; 305. second positioning column; 306. elastic clip; 4. pin height limiting strip; 5. circuit board; 6. MOS tube. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] It should be noted that when a component is referred to as being "fixed" or "set" or "connected" to another component, it may be located directly or indirectly on the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and should not be construed as limitations on the present technical solution. The terms "first", "second", etc. are only used for the convenience of description and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0027] like Figures 2 to 4 As shown, a welding fixture suitable for a suspended MOS tube described in one embodiment of the utility model includes a fixture body 1, on which a first limiting component 2 for positioning a circuit board 5 and a second limiting component 3 for positioning a MOS tube 6 are arranged. The second limiting component 3 includes a height limiting step 301 arranged on the fixture body 1, and the fixture body 1 is detachably connected with a pressure strip 302 on the height limiting step 301, and the MOS tube 6 is clamped between the height limiting step 301 and the pressure strip 302.

[0028] When in use, first place the circuit board 5 to be welded on the first limit assembly 2 of the fixture body 1, and through the precise positioning of the first limit assembly 2, the circuit board 5 is stably and accurately fixed on the fixture. Then plug the MOS tube 6 to be welded into the circuit board 5, and at this time, the MOS tube 6 is placed at the height limit step 301 on the fixture body 1. The MOS tubes 6 with different height requirements correspond to the height limit steps 301 of different heights, so that the MOS tube 6 can meet the predetermined suspension and height limit requirements during welding. Then connect the pressure strip 302 to the fixture body 1 so that it and the height limit step 301 can clamp the MOS tube 6 together, so that the MOS tube 6 is firmly clamped between the height limit step 301 and the pressure strip 302. After ensuring that the MOS tube 6 is stably clamped, the wave soldering equipment can be used, and the equipment automatically welds the device, and because the MOS tube 6 has been accurately positioned and fixed, the welding process will be more stable and efficient. After welding is completed, the pressure strip 302 can be easily disassembled, and the welded circuit board 5 can be removed from the fixture for subsequent inspection and assembly.

[0029] In this embodiment, through the synergistic effect of the first limit component 2 and the second limit component 3, the clamp can achieve accurate positioning of the circuit board 5 and the MOS tube 6, ensuring stability and accuracy during the welding process. The clamping method of the height limit step 301 and the pressure strip 302 ensures the suspension and height limit requirements of the MOS tube 6, so that the MOS tube 6 after welding can maintain good flatness and meet the height offset requirements. The existing hand welding fixture adopts the method of manually locking screws for manual welding. Manual welding after the suspension limit locking is very difficult. Manual work occasionally fails to meet the suspension height standard, and it will often be reworked and repeatedly repaired, which requires a lot of manpower and material resources. Compared with the hand welding fixture, the clamp improves the positioning efficiency and positioning accuracy of the MOS tube 6, and can be automatically welded through wave soldering equipment, which greatly improves the consistency of welding, greatly improves the efficiency and quality, and effectively reduces the labor cost.

[0030] In this embodiment, the fixture body 1 is provided with a device that can clamp two circuit boards 5 at the same time, further improving production efficiency. In practical application, multiple circuit boards 5 can be arranged on one fixture body 1. The height limiting step 301 is detachably connected to the fixture body 1, and in this embodiment, it is connected by screws. According to the height limit requirements, different specifications of the height limiting step 301 can be selected.

[0031] like Figure 2 As shown, in a preferred embodiment, the first limiting component 2 includes a receiving groove 201 disposed on the fixture body 1 , and the length, width and depth of the receiving groove 201 are respectively equivalent to the length, width and thickness of the circuit board 5 .

[0032] A first positioning column 202 is disposed in the receiving groove 201 , and a first positioning hole corresponding to the first positioning column 202 is disposed on the circuit board 5 . A nut is threadedly connected to the first positioning column 202 , and the nut is a sleeve nut.

[0033] When this embodiment is used, the circuit board 5 is first placed in the receiving groove 201 on the fixture body 1. The length, width and depth of the receiving groove 201 match the length, width and thickness of the circuit board 5, so that the circuit board 5 can be stably placed in the receiving groove 201. At the same time, the first positioning column 202 is used for positioning. A first positioning hole corresponding to the first positioning column 202 is pre-set on the circuit board 5, and the first positioning column 202 is inserted into the positioning hole and then fixed with a sleeve nut. The thread of the nut is matched with the thread of the first positioning column 202. By rotating the nut, it can be tightly locked with the first positioning column 202, so that the circuit board 5 is firmly locked in the receiving groove 201.

[0034] This embodiment successfully achieves efficient and accurate positioning of the circuit board 5 through the first limiting assembly 2 composed of the accommodating groove 201, the first positioning column 202 and the sleeve nut. The accommodating groove 201 ensures the stability of the circuit board 5 on the fixture body 1, and effectively prevents the movement or offset of the circuit board 5 during the welding process. The coordinated use of the first positioning column 202 and the first positioning hole further improves the accuracy of positioning and ensures that the circuit board 5 is accurately positioned on the fixture. The sleeve nut is easy to operate, simplifies the fixing process, and ensures the reliability of fixing. The first limiting assembly 2 improves the accuracy and stability of welding, effectively reduces the possibility of human operation errors, and provides strong support for large-scale and efficient MOS tube 6 welding operations.

[0035] like Figure 2 As shown, in a preferred embodiment, the clamp body 1 is rotatably connected with a pressing block 203 on one side close to the receiving groove 201 , and the rotatable pressing block 203 is placed above the receiving groove 201 to press the circuit board 5 , or away from the receiving groove 201 to loosen the circuit board 5 .

[0036] When the circuit board 5 needs to be fixed in the receiving groove 201, the pressing block 203 only needs to be gently rotated to place it above the receiving groove 201. At this time, the lower surface of the pressing block 203 is in close contact with the circuit board 5, and the edge of the circuit board 5 is firmly pressed in the receiving groove 201. When the circuit board 5 needs to be replaced or removed, the pressing block 203 only needs to be rotated again to keep it away from the receiving groove 201, and the circuit board 5 can be released, which is convenient for subsequent operations. The pressing block 203 is not only easy to operate, but also can effectively ensure the stability of the circuit board 5 during the welding process.

[0037] The pressing block 203 rotatably connected to the clamp body 1 facilitates the fixing and loosening of the circuit board 5. The circuit board 5 can be quickly fixed and released by a simple rotation action, which greatly improves the production efficiency. At the same time, the pressing action of the pressing block 203 ensures the stability of the circuit board 5 during the welding process, and effectively prevents welding quality problems caused by the movement or deviation of the circuit board 5. In addition, the operation difficulty and labor intensity are reduced, so that the staff can more easily complete the positioning of the circuit board 5.

[0038] like Figure 2 As shown, in a preferred embodiment, a welding avoidance hole 101 is provided in the accommodating groove 201 , and the welding avoidance hole 101 corresponds to the position of the pin of the MOS tube 6 .

[0039] When the circuit board 5 is placed in the receiving groove 201 and is pressed and fixed by the pressing block 203, the pins of the MOS tube 6 are naturally aligned with the welding avoidance holes 101, making the welding operation more accurate and convenient. The welding equipment is aligned with the welding avoidance holes 101 for welding, which can ensure that the connection between the pins and the circuit board 5 is accurate, further improving the quality and efficiency of welding.

[0040] like Figure 2 As shown, in a preferred embodiment, two material taking grooves 102 are arranged at the edge of the containing groove 201, and the two material taking grooves 102 are arranged opposite to each other.

[0041] When it is necessary to place or remove the circuit board 5, the operator can easily put his fingers or tools into the two material extraction slots 102, and then firmly hold the sides of the circuit board 5. With the assistance of the material extraction slots 102, the placement and removal process of the circuit board 5 becomes more convenient and accurate, and damage to the circuit board 5 is prevented. At the same time, the material extraction slots 102 also take into account the comfort of the operator, and their size and position are convenient for operation, making the operation process both efficient and labor-saving.

[0042] In this embodiment, by providing the material taking slot 102, it is convenient to place and take out the circuit board 5 on the fixture, which improves the convenience of operation and reduces the possibility of damage to the circuit board 5 due to misoperation during operation. With the assistance of the material taking slot 102, the operator can more accurately control the position and direction of the circuit board 5, thereby ensuring that the circuit board 5 is accurately placed on the fixture, ensuring the accurate relative position of the MOS tube 6 and the circuit board 5, and thus ensuring the welding quality. In addition, the design of the material taking slot 102 also improves the comfort of operation and reduces the labor intensity of the operator.

[0043] like Figure 2 and Figure 5 As shown, in a preferred embodiment, a connecting column 303 is provided on the clamp body 1, a connecting hole 304 corresponding to the connecting column 303 is provided on the pressure strip 302, the connecting column 303 passes through the connecting hole 304, and a nut is threadedly connected to the connecting column 303, and the nut is a sleeve nut.

[0044] When the pressure strip 302 needs to be fixed on the clamp body 1, it is only necessary to pass the connecting column 303 through the connecting hole 304 on the pressure strip 302, and then tighten the sleeve nut on the external thread of the connecting column 303. The close combination of the connecting column 303 and the connecting hole 304 ensures the stability of the pressure strip 302 on the clamp body 1, and the tightening effect of the sleeve nut further enhances the stability, thereby ensuring that the MOS tube 6 is stably and accurately positioned between the pressure strip 302 and the height-limiting step 301. The sleeve nut makes the operation process simple and quick, and the pressure strip 302 can be quickly installed and fixed without complicated tools.

[0045] In this embodiment, the connection column 303, the connection hole 304 and the sleeve nut are used in combination to successfully achieve the firm fixation of the pressure strip 302 on the clamp body 1, which not only improves the stability and reliability of the overall structure of the clamp, ensures the accuracy and consistency during the welding process, but also simplifies the installation and removal process of the pressure strip 302, and improves production efficiency. In addition, since the sleeve nut is used as a fastening element, it can also achieve rapid tightness adjustment, which is convenient for adjusting the pressing force of the pressure strip 302 according to actual conditions.

[0046] like Figure 2 As shown, in a preferred embodiment, the clamp body 1 is rotatably connected with an elastic clip 306 near the height limiting step 301 , and the rotatable elastic clip 306 is placed above the pressure strip 302 to compress the pressure strip 302 , or is moved away from the pressure strip 302 to loosen the pressure strip 302 .

[0047] When the pressure strip 302 needs to be fixed, the elastic clip 306 only needs to be gently rotated to place it above the pressure strip 302. At this time, due to the elasticity of the elastic clip 306 itself, it can be tightly attached to the pressure strip 302, ensuring that the pressure strip 302 is firmly pressed on the height-limiting step 301. When the pressure strip 302 needs to be loosened, the elastic clip 306 only needs to be rotated again to keep it away from the pressure strip 302.

[0048] In this embodiment, by providing an elastic clip 306, the pressure strip 302 can be quickly tightened and loosened by rotating the elastic clip 306, further improving the positioning stability of the MOS tube 6, and facilitating the positioning and replacement of the MOS tube 6, thereby reducing labor intensity and improving production efficiency.

[0049] like Figures 2 to 4 As shown, in a preferred embodiment, a second positioning column 305 is provided on the height-limiting step 301 , and a second positioning hole cooperating with the second positioning column 305 is provided on the MOS tube 6 .

[0050] When positioning the MOS tube 6, the operator only needs to place the MOS tube 6 on the height-limiting step 301, and insert the second positioning column 305 into the second positioning hole. By using the second positioning column 305 in conjunction with the second positioning hole, the MOS tube 6 is accurately positioned. This not only simplifies the positioning process, but also improves the accuracy and reliability of positioning. Accurate positioning ensures the stability of the MOS tube 6 during the welding process and effectively prevents welding quality problems caused by position offset. In addition, this design also reduces the difficulty of operation and reduces the impact of human factors on positioning accuracy.

[0051] like Figure 2As shown, in a preferred embodiment, a pin height limiting strip 4 is provided between the circuit board 5 and the MOS tube 6 , and the pin height limiting strip 4 is used to adjust the distance between the circuit board 5 and the MOS tube 6 .

[0052] Before preparing to insert the MOS tube 6, the pin height limit strip 4 is first placed on the circuit board 5 to ensure the accuracy and stability of the subsequent insertion position of the MOS tube 6. After the pin height limit strip 4 is placed, the MOS tube 6 is inserted into the circuit board 5 to ensure that the pins of the MOS tube 6 are tightly fitted with the limit strip, and the spacing between the circuit board 5 and the MOS tube 6 is accurately controlled.

[0053] In this embodiment, by accurately adjusting the position of the pin height limit strip 4, accurate control of the spacing is achieved, thereby ensuring that the height of the MOS tube 6 pins during welding meets the preset requirements, which not only improves the accuracy and consistency of welding, but also reduces the risk of welding defects caused by improper pin height, and can effectively prevent problems such as cold soldering and short circuits that may occur during welding, thereby improving product quality. In addition, the use of the pin height limit strip 4 accurately controls the spacing between the circuit board 5 and the MOS tube 6, simplifies the operation process of spacing adjustment, reduces the difficulty of operation and the error rate, and improves work efficiency. In addition, the pin height limit strip 4 has a variety of specifications, which can be suitable for circuit boards 5 and MOS tubes 6 of different sizes and requirements, and has good flexibility.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding fixture suitable for MOS tube suspension limit, characterized in that: It includes a fixture body, on which is provided a first limiting component for positioning a circuit board, and a second limiting component for positioning a MOS tube, the second limiting component includes a height limiting step arranged on the fixture body, the fixture body is detachably connected with a pressure strip on the height limiting step, and the MOS tube is clamped between the height limiting step and the pressure strip.

2. According to the above-mentioned MOS tube suspension limiting welding fixture, it is characterized in that: The first limiting component includes a receiving groove arranged on the clamp body, and the length, width and depth of the receiving groove are respectively equivalent to the length, width and thickness of the circuit board.

3. According to the above-mentioned welding fixture for MOS tube suspension limit, it is characterized in that: A first positioning column is arranged in the accommodating groove, a first positioning hole corresponding to the first positioning column is arranged on the circuit board, and a nut is threadedly connected to the first positioning column.

4. According to the above-mentioned welding fixture for MOS tube suspension limiter according to claim 2, it is characterized in that: The clamp body is rotatably connected with a pressing block at one side close to the receiving groove. The pressing block is rotated to be placed above the receiving groove for pressing the circuit board, or is moved away from the receiving groove for loosening the circuit board.

5. According to the above-mentioned welding fixture for MOS tube suspension limiter according to claim 2, it is characterized in that: A welding avoidance hole is arranged in the accommodating groove, and the welding avoidance hole corresponds to the position of the MOS tube pin.

6. According to claim 2, a MOS tube suspension limiting welding fixture is suitable for use, characterized in that: Two material taking grooves are arranged on the edge of the containing groove, and the two material taking grooves are arranged opposite to each other.

7. A MOS tube suspension limiting welding fixture according to any one of claims 1 to 6, characterized in that: The clamp body is provided with a connecting column, the pressure strip is provided with a connecting hole corresponding to the connecting column, the connecting column passes through the connecting hole, and a nut is threadedly connected to the connecting column.

8. A MOS tube suspension limiting welding fixture according to any one of claims 1 to 6, characterized in that: A second positioning column is arranged on the height-limiting step, and a second positioning hole cooperating with the second positioning column is arranged on the MOS tube.

9. A MOS tube suspended position limiting welding fixture according to any one of claims 1-6, characterized in that: The clamp body is rotatably connected with an elastic clip near the height-limiting step. The elastic clip is rotated to be placed above the pressure strip to press the pressure strip, or is moved away from the pressure strip to loosen the pressure strip.

10. A suspended position limiting welding fixture for MOS tubes according to any one of claims 1 to 6, characterized in that: A pin height limiting strip is arranged between the circuit board and the MOS tube, and the pin height limiting strip is used to adjust the distance between the circuit board and the MOS tube.

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