Circuit board reflow soldering jig
By designing a circuit board reflow fixture with adjustable pitch, the problem of bending and deformation of the circuit board during reflow soldering is solved, and the versatility and cost reduction of the fixture is achieved.
Patent Information
- Application Number
- CN202422356171.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-26
AI Technical Summary
In the prior art, circuit boards are prone to bend and deform during reflow soldering, which affects the quality of the circuit board and increases manufacturing costs. Different circuit boards require special fixtures, resulting in increased costs.
A circuit board reflow soldering fixture is designed, including substrate, positioning strip and screw hole structure. By adjusting the positioning strip spacing and using adjustable waist holes, it provides adjustable support, reduces the bending and deformation of the circuit boards and adapts to the processing needs of different specifications of circuit boards.
Effectively reduce the bending deformation of the circuit board during the reflow soldering process, improve the versatility of the fixture, and reduce the manufacturing cost of the circuit board.
Smart Images
Figure CN223157326U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit board processing, and particularly relates to a reflow soldering fixture for a circuit board. Background Art
[0002] At present, in the process of processing a patch circuit board, there are two methods: passing the bare board through the reflow soldering without a fixture and passing the board through the reflow soldering with a special fixture for the model.
[0003] When passing the bare board through the reflow soldering without a fixture, the circuit board is prone to bending and deformation after passing through the furnace, which affects the quality of the solder paste printing and the patch components on the secondary side of the circuit board. If the circuit board is severely deformed, it needs to be scrapped. When using a special fixture (tray) for the model to pass through the reflow soldering, different fixtures need to be manufactured for different circuit boards.
[0004] Both of the above situations will increase the manufacturing cost of the circuit board. Content of the Utility Model
[0005] The purpose of the utility model is to provide a reflow soldering fixture for a circuit board.
[0006] To achieve the above-mentioned utility model purpose, the utility model adopts the following technical scheme:
[0007] A reflow soldering fixture for a circuit board includes a substrate. The substrate is divided into a hollow area arranged in an array and a connection area except the hollow area. The connection area is provided with screw holes.
[0008] The fixture further includes a first positioning strip and second positioning strips parallel to both sides of the first positioning strip. Two overlapping edges are recessed on the top surfaces of the first positioning strip and the second positioning strips. The two overlapping edges are located on both sides of the corresponding first positioning strip or second positioning strip in the width direction and extend along the length direction.
[0009] The first positioning strip is provided with a first counterbore, and the second positioning strip is provided with a second counterbore. The first positioning strip and the second positioning strip are fixedly connected to the screw holes on the substrate through fixing bolts penetrating the first counterbore or the second counterbore. The screw holes are evenly arranged at intervals on the connection area, so as to adjust the distance between the first positioning strip and the second positioning strip by selecting the fixing positions of the screw holes.
[0010] As a further improved technical scheme of the utility model, the second counterbore is an oblong hole, and the length of the oblong hole is greater than the distance between two adjacent screw holes on the substrate, so as to finely adjust the distance between the first positioning strip and the second positioning strip by selecting the fixing position of the fixing bolt on the oblong hole.
[0011] As a further improved technical scheme of the utility model, support bolts for assisting in supporting the circuit board are further arranged on the screw holes between the first positioning strip and the second positioning strip.
[0012] As a further improved technical solution of the present utility model, a convex edge is provided along the edge of the substrate, and the top surface of the convex edge is higher than the top surfaces of the first positioning strip and the second positioning strip.
[0013] As a further improved technical solution of the present utility model, notches are provided on the convex edges on both sides near the ends of the first positioning strip and the second positioning strip.
[0014] Compared with the prior art, the technical effects of the present utility model are as follows:
[0015] The present utility model can be used to support the circuit board during reflow soldering, reduce the bending and deformation of the circuit board, and the spacing between the first positioning strip and the second positioning strip for supporting the circuit board is adjustable, which can be used for supporting and fixing various specifications of circuit boards during reflow soldering, with good versatility and beneficial to reducing the manufacturing cost of the circuit board. Description of the Drawings
[0016] Figure 1 is a top view structural schematic diagram of a circuit board reflow soldering fixture in a specific embodiment of the present utility model;
[0017] Figure 2 is a top view structural schematic diagram of a circuit board reflow soldering fixture when supporting the circuit board in a specific embodiment of the present utility model;
[0018] Figure 3 is Figure 2 the cross-sectional structural schematic diagram in the A-A direction in Specific Embodiments
[0019] The present utility model will be described in detail below in conjunction with the specific embodiments shown in the drawings. However, these embodiments do not limit the present utility model, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present utility model.
[0020] Please refer to Figures 1 to 3 , a circuit board reflow soldering fixture, including a substrate 1, the substrate 1 is divided into a hollow area 11 arranged in an array and a connection area 12 except the hollow area 11, and screw holes 2 are provided on the connection area 12;
[0021] It further includes a first positioning strip 5 and a second positioning strip 6 arranged in parallel on both sides of the first positioning strip 5. Two overlapping edges 3 are recessed on the top surfaces of the first positioning strip 5 and the second positioning strip 6. The two overlapping edges 3 are located on both sides in the width direction of the corresponding first positioning strip 5 or second positioning strip 6 and extend along the length direction;
[0022] The first positioning strip 5 is provided with a first counterbore 51, and the second positioning strip 6 is provided with a second counterbore 61, so as to be fixedly connected to the screw holes 2 on the substrate 1 through fixing bolts 4 passing through the first counterbore 51 or the second counterbore 61. The screw holes 2 are evenly arranged at intervals in the connection area 12, so as to adjust the distance between the first positioning strip 5 and the second positioning strip 6 by selecting the fixing positions of the screw holes 2.
[0023] The first positioning strip 5 and the second positioning strip 6 are used to cooperate to support the circuit board 100. Before using the utility model, select the screw holes 2 for fixing the first positioning strip 5 and the second positioning strip 6 according to the size of the circuit board 100, place the first positioning strip 5 and the second positioning strip 6, align the first counterbore 51 and the second counterbore 61 with the selected screw holes 2, and use the fixing bolts 4 to fix the first positioning strip 5 and the second positioning strip 6 on the substrate 1. The distance between the first positioning strip 5 and the second positioning strip 6 should meet the requirement that the two side edges of the circuit board 100 can respectively rest on the overlapping edges 3 of the first positioning strip 5 and the second positioning strip 6.
[0024] The distances between the two side second positioning strips 6 and the first positioning strip 5 can be the same or different, which is specifically determined according to the specifications of the circuit board 100 to be processed. For example, if only the circuit board 100 of a certain specification needs to be reflow soldered in the current production batch, the distances between the two side second positioning strips 6 and the first positioning strip 5 can be adjusted to be the same. Another example is that if the current production batch needs to reflow solder two specifications of circuit boards 100 with approximately the same quantity at the same time, the distances between the two side second positioning strips 6 and the first positioning strip 5 can be adjusted to be different to support the reflow soldering of the two specifications of circuit boards 100 at the same time.
[0025] Further, the second counterbore 61 is an oblong hole, and the length of the oblong hole is greater than the distance between two adjacent screw holes 2 on the substrate 1, so as to finely adjust the distance between the first positioning strip 5 and the second positioning strip 6 by selecting the fixing position of the fixing bolt 4 on the oblong hole.
[0026] When the distance between the first positioning strip 5 and the second positioning strip 6 cannot be adjusted to be suitable for supporting the circuit board 100 by selecting the fixing positions of the screw holes 2 (it is still a little short), the position of the second positioning strip 6 can be finely adjusted through the moving space of the oblong hole. Since the length of the oblong hole is greater than the distance between two adjacent screw holes 2 on the substrate 1, the moving space span provided by the oblong hole for the second positioning strip 6 can cover the distance between two adjacent screw holes 2. During use, first select the screw holes 2 to adjust the distance between the second positioning strip 6 and the first positioning strip 5 to be approximately the same as the size of the circuit board 100 (the distance may be a little larger or smaller), and then finely adjust the distance between the second positioning strip 6 and the first positioning strip 5 through the oblong hole so that the circuit board 100 can rest on the overlapping edge 3. The adjustment space provided by the oblong hole makes the utility model more versatile.
[0027] Furthermore, a support bolt 7 for assisting in supporting the circuit board 100 is also provided on the screw hole 2 between the first positioning strip 5 and the second positioning strip 6.
[0028] When the size of the circuit board 100 is relatively large, the support bolt 7 is used to support the middle part of the circuit board 100. The support bolt 7 is threadedly connected to the screw hole 2, and by controlling the screwing depth of the support bolt 7 in the screw hole 2, the top of the support bolt 7 is brought into contact with the bottom surface of the circuit board 100. At the same time, the installation position of the support bolt 7 should avoid the welding position of the circuit board 100.
[0029] Furthermore, a convex edge 8 is provided along the edge of the substrate 1, and the top surface of the convex edge 8 is higher than the top surfaces of the first positioning strip 5 and the second positioning strip 6. The convex edge 8 is used to protect the circuit board 100 on the jig. During the process of stacking and temporarily storing or transporting multiple jigs, the convex edge 8 of the jig is pressed and stressed, avoiding knocking and bumping the circuit board 100.
[0030] Furthermore, notches 9 are provided on the convex edges 8 on both sides near the ends of the first positioning strip 5 and the second positioning strip 6.
[0031] When the length of the circuit board 100 is approximately the same as that of the first and second positioning strips, due to the existence of the convex edge 8, there will be interference with the convex edge 8 when manually placing and removing the circuit board 100 on the jig. The notches 9 are provided to facilitate the placement and removal of the circuit board 100.
[0032] When the present utility model is in use, by selecting the screw hole 2 and fine-tuning with the waist-shaped hole, the distance between the first and second positioning strips is adjusted appropriately, and then the first and second positioning strips are fixed on the substrate 1 with the fixing bolts 4. When the size of the circuit board 100 is relatively large, a number of support bolts 7 can also be provided on the substrate 1. After debugging is completed, the circuit board 100 can be placed into the jig, and there is no need to perform debugging again during the production process of the same batch of circuit boards 100.
[0033] Compared with the prior art, the technical effects of the present utility model are as follows:
[0034] The present utility model can be used to support the circuit board 100 during reflow soldering, reduce the bending and deformation phenomenon of the circuit board 100, and the distance between the first positioning strip 5 and the second positioning strip 6 for supporting the circuit board 100 is adjustable, which can be used for supporting and fixing various specifications of circuit boards 100 during reflow soldering, with good versatility and beneficial to reducing the manufacturing cost of the circuit board 100.
[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A circuit board reflow soldering fixture, characterized in that, It includes a substrate which is divided into a hollow area arranged in an array and a connection area except the hollow area, and screw holes are provided on the connection area; It further includes a first positioning strip and second positioning strips arranged in parallel on both sides of the first positioning strip. On the top surfaces of the first positioning strip and the second positioning strips, two overlapping edges are sunken. The two overlapping edges are located on both sides of the corresponding first positioning strip or second positioning strip in the width direction and extend along the length direction; A first counterbore is provided on the first positioning strip, and a second counterbore is provided on the second positioning strip, so as to be fixedly connected to the screw holes on the substrate through fixing bolts passing through the first counterbore or the second counterbore. The screw holes are evenly arranged at intervals on the connection area, so as to adjust the distance between the first positioning strip and the second positioning strip by selecting the fixing positions of the screw holes.
2. The reflow soldering fixture for circuit board according to claim 1, wherein The second counterbore is an oblong hole, and the length of the oblong hole is greater than the distance between two adjacent screw holes on the substrate, so as to finely adjust the distance between the first positioning strip and the second positioning strip by selecting the fixing positions of the fixing bolts on the oblong hole.
3. The reflow soldering fixture for circuit board according to claim 1, characterized in that, Support bolts for assisting in supporting the circuit board are further provided on the screw holes between the first positioning strip and the second positioning strip.
4. The reflow soldering fixture for a circuit board according to claim 1, wherein A convex edge is provided along the edge of the substrate, and the top surface of the convex edge is higher than the top surfaces of the first positioning strip and the second positioning strips.
5. The reflow soldering fixture for circuit board according to claim 4, wherein Notches are provided on the convex edges on both sides near the ends of the first positioning strip and the second positioning strips.