Welding tool for circuit board

Abstract

The utility model relates to the technical field of brazing or welding processing, in particular to a welding tool of a circuit board, which comprises a fixed base and an upper cover, the upper cover is pressed on the fixed base, the circuit board is arranged between the fixed base and the upper cover which are pressed, and a middle plate is arranged between the circuit board and the upper cover. The circuit board comprises a substrate and components arranged on the substrate, the components comprise a first assembly and a second assembly, the height of the first assembly is smaller than that of the second assembly, the first assembly is arranged between the fixed base and the middle-layer plate, and the middle-layer plate is provided with an avoiding hole for the second assembly to extend out, so that the second assembly is arranged between the middle-layer plate and the upper cover. A board groove capable of containing a circuit board is formed in the fixing base, and screw holes used for fixing the circuit board are formed in the four corners of the board groove. According to the welding tool, by additionally arranging the middle-layer plate, the middle-layer plate is matched with the cover plate, so that components with different heights are fixed, and later welding operation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to brazing or welding processing technical field, especially line board's welding frock. BACKGROUND

[0002] Line board, circuit board, PCB board, welding technology in recent years electronic industry process development course, can notice a very obvious trend is reflow soldering technology, principle passes traditional plug-in component also can use reflow soldering process, this is usually called general reflow soldering, its advantage is possible in the same time complete all solder joints, makes production cost to be as low as possible, however temperature sensitive element has limited reflow soldering application, whether it is plug-in component or SMD, then people turn to the choice welding, most applications can adopt the choice welding after reflow soldering, this will become the economic and effective welding method of completing the remaining plug-in component, and is completely compatible with future leadless welding.

[0003] Welding process needs to use welding frock to fix line board to guarantee welding effect, and the existing welding frock is generally fixed by pressing two layers of upper and lower, for the need of simultaneously welding various kinds of components with different shapes and heights, the process is not stable enough, and there are many quality problems, and the welding of each component needs to be separately made with a matching frock, which has high investment cost. UTILITY MODEL CONTENTS

[0004] In order to solve the problem that the existing welding frock has single structure and cannot simultaneously fix different kinds of components with different heights, the utility model provides a welding frock for line board, which is fixed by adding a middle layer plate, so that the middle layer plate cooperates with the cover plate to fix components with different heights, thereby facilitating the subsequent welding operation.

[0005] The utility model provides a kind of welding frock for line board, including fixed base and upper cover, upper cover is pressed in fixed base, line board is placed between fixed base and upper cover of pressing, middle layer plate is provided between line board and upper cover, line board includes substrate and component on substrate, component includes first assembly and second assembly, the height of first assembly is less than second assembly, first assembly is placed between fixed base and middle layer plate, and the avoiding hole for second assembly to extend is set on middle layer plate, so that second assembly is placed between middle layer plate and upper cover. First assembly and second assembly are fixed separately by middle layer plate, and first assembly with lower height is placed below middle layer plate, and second assembly with higher height extends from middle layer plate, to realize the welding operation of simultaneously fixing components with different heights.

[0006] Further, the fixed base is provided with a board groove capable of accommodating the line board, and the board groove is provided with screw holes for fixing the line board at four corners. The board groove is set according to the shape of the line board, and the screw holes ensure stability.

[0007] Further, the fixed base is further provided with a taking and placing groove in communication with the plate groove, and the taking and placing groove is symmetrically arranged on both sides of the plate groove. The taking and placing groove facilitates taking out the circuit board from the plate groove.

[0008] Further, the plate groove is provided with a processing hole corresponding to the components on the circuit board. After the circuit board is fixed, the jig is turned over to perform welding operation on the pin end of the inserted component.

[0009] Further, the fixed base is provided with at least two positioning columns arranged on two opposite corners of the fixed base, and the middle layer plate is provided with positioning holes corresponding to the positioning columns. The positioning columns on the opposite corners are used for fixing the middle layer plate to prevent displacement.

[0010] Further, the fixed base is provided with a blocking strip at both ends, and the opposite surface of the blocking strip at both ends is provided with a recessed positioning surface, and the middle layer plate is arranged between the positioning surfaces of the blocking strips at both ends. The blocking strip is used for limiting the middle layer plate and supporting the fixed base and the upper cover.

[0011] Further, the middle layer plate is provided with a gap on both sides for easy taking. The gap facilitates the taking and placing of the middle layer plate.

[0012] Further, the upper cover is provided with a connecting hole at at least two corners, and a screw is screwed into the connecting hole and penetrates the upper cover, the blocking strip and the fixed base in sequence. The upper cover and the fixed base are connected by the screw to complete the reinforcement of the whole jig.

[0013] The beneficial effects of the present application are as follows:

[0014] The present application provides a welding jig for a circuit board. The components of different heights on the circuit board are separated by the middle layer plate. The components with lower height are arranged between the middle layer plate and the fixed base, and the components with higher height are arranged between the upper cover and the middle layer plate. The welding operation of components with different heights can be completed at one time, thereby effectively improving the welding efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor;

[0016] Figure 1 is an exploded view of the welding jig;

[0017] Figure 2 This is a schematic diagram of the circuit board;

[0018] Figure 3 This is a schematic diagram of the fixed base;

[0019] Figure 4 This is a schematic diagram of the middle layer plate;

[0020] Figure 5 This is an assembly diagram of the fixed base and the middle layer plate;

[0021] Figure 6 It is an assembly diagram of the welding fixture;

[0022] In the diagram: 1. Fixed base, 11. Plate groove, 12. Screw hole, 13. Pick-up and drop slot, 14. Machining hole, 15. Positioning post, 16. Stop bar, 161. Positioning surface, 2. Top cover, 21. Connecting hole, 3. Circuit board, 31. First component, 32. Second component, 4. Middle layer board, 41. Clearance hole, 42. Positioning hole, 43. Notch. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] To achieve the fixation of components of different heights for simultaneous soldering, a soldering fixture for circuit boards is designed, such as... Figure 1 As shown, the fixture includes a fixed base 1 and a top cover 2. The top cover 2 is pressed onto the fixed base 1, and the circuit board 3 is placed between the pressed fixed base 1 and the top cover 2. The fixed base 1 has a slot for placing the circuit board 3, and a through hole is provided in the slot. The circuit board 3 is placed stably in the slot, and then electrical components are inserted into the circuit board 3. Finally, the top cover 2 is closed, and screws are used to fix the top cover 2 to the fixed base 1, thus completing the fixing of the electrical components on the circuit board 3. Then, the entire fixture is rotated 180° so that the bottom surface of the fixed base 1 is facing up and placed on the soldering workbench. The soldering head is used to solder and fix the protruding pins on the circuit board 3 through the holes.

[0025] The core of this technical solution is that a middle layer plate 4 is provided between the circuit board 3 and the top cover 2. The circuit board 3 includes a substrate and components disposed on the substrate. The components include a first component 31 and a second component 32. The height of the first component 31 is less than that of the second component 32. The first component 31 is placed between the fixed base 1 and the middle layer plate 4. The middle layer plate 4 is provided with a clearance hole 41 for the second component 32 to extend out, so that the second component 32 is placed between the middle layer plate 4 and the top cover 2.

[0026] like Figure 2As shown, the first component 31 includes connectors, positioners and other low-height elements, and the second component 32 includes iron sheets, capacitors and other high-height elements. When clamping, the fixed base 1 is placed on the workbench, then the substrate of the circuit board 3 is placed in the plate groove 11 of the fixed base 1, and the substrate is positioned by the screw hole 12 at the corner of the plate groove 11. After the substrate is positioned, the first component 31 and the second component 32 are inserted into the substrate and covered with the middle layer plate 4, and the middle layer plate 4 is clamped between the blocking strips 16 at both ends of the fixed base 1. At this time, the first component 31 with low height is fixed below the middle layer plate 4, and the second component 32 with high height extends out of the avoiding hole 41 in the middle layer plate 4. Then the upper cover 2 is closed, and the upper cover 2 is fixedly connected with the fixed base 1 by the connecting hole 21 on the upper cover 2, that is, the clamping of the components with different heights on the circuit board 3 is completed. Finally, the whole tooling is turned over by 180°, so that the bottom surface of the fixed base 1 faces upward, and the welding robot welds the pins of the components inserted and extended from the processing hole 14 in the bottom surface of the fixed base 1.

[0027] As shown in Figure 3 In order to stably place the circuit board 3, the fixed base 1 is provided with a plate groove 11 capable of accommodating the circuit board 3, and the four corners of the plate groove 11 are provided with screw holes 12 for fixing the circuit board 3.

[0028] In order to facilitate the taking and placing of the middle layer plate 4, the fixed base 1 is further provided with a taking and placing groove 13, which is in communication with the plate groove 11 and is symmetrically arranged on both sides of the plate groove 11.

[0029] In order to facilitate the welding operation of the pins of the components, the plate groove 11 is provided with a processing hole 14 corresponding to the components on the circuit board 3. After the components are inserted into the substrate, the pins extend from the bottom surface of the substrate.

[0030] As shown in Figure 4 In order to ensure that the middle layer plate 4 is placed in place, at least two positioning columns 15 are arranged on the fixed base 1, and the two positioning columns 15 are arranged on the two opposite corners of the fixed base 1. The middle layer plate 4 is provided with positioning holes 42 corresponding to the positioning columns 15. When the middle layer plate 4 is placed, the positioning holes 42 on the middle layer plate 4 are aligned with the positioning columns 15 on the fixed base 1, so that the middle layer plate 4 can be stably placed.

[0031] As shown in Figure 5 In order to further ensure the stable placement of the middle layer plate 4, the fixed base 1 is fixedly provided with blocking strips 16 at both ends, and the opposite surfaces of the two blocking strips 16 are provided with recessed positioning surfaces 161. The middle layer plate 4 is placed between the positioning surfaces 161 of the two blocking strips 16. At the same time, the blocking strips 16 also support the upper cover 2 and ensure the stability of the connection between the upper cover 2 and the fixed base 1.

[0032] In order to facilitate the taking and placing of the middle layer plate, the two sides of the middle layer plate 4 are provided with a gap 43 for facilitating taking and placing. The gap 43 is arranged corresponding to the taking and placing groove 13 on the fixed base 1.

[0033] As shown in Figure 6 In order to fix the whole tooling, at least two corners of the upper cover 2 are provided with connecting holes 21, and screws arranged in the connecting holes 21 sequentially penetrate the upper cover 2, the blocking strip 16 and the fixed base 1.

[0034] The above description is only illustrative but not restrictive for the utility model, and those skilled in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all will fall within the protection scope of the utility model.

Claims

1. A welding tool for a circuit board, comprising a fixed base (1) and an upper cover (2), the upper cover (2) being pressed on the fixed base (1), and the circuit board (3) being placed between the pressed fixed base (1) and the upper cover (2), characterized in that: The circuit board (3) and the upper cover (2) are provided with a middle layer plate (4), the circuit board (3) comprises a substrate and components arranged on the substrate, the components comprise a first component (31) and a second component (32), the height of the first component (31) is less than that of the second component (32), the first component (31) is arranged between the fixed base (1) and the middle layer plate (4), the middle layer plate (4) is provided with a relief hole (41) for the second component (32) to extend, so that the second component (32) is arranged between the middle layer plate (4) and the upper cover (2). ​ 2. The soldering tool for a circuit board according to claim 1, wherein: The fixed base (1) is provided with a board groove (11) for accommodating the circuit board (3), and the board groove (11) is provided with screw holes (12) for fixing the circuit board (3) at four corners.

3. The soldering tool for a circuit board according to claim 2, wherein: The fixed base (1) is further provided with a taking and placing groove (13), the taking and placing groove (13) is in communication with the board groove (11), and the taking and placing groove (13) is symmetrically arranged on both sides of the board groove (11).

4. The soldering tool for a circuit board according to claim 2, wherein: The board groove (11) is provided with a processing hole (14), and the processing hole (14) is arranged corresponding to the components on the circuit board (3).

5. The soldering tool for a circuit board according to claim 1, wherein: The fixed base (1) is provided with at least two positioning columns (15), and the two positioning columns (15) are arranged at two opposite corners of the fixed base (1), respectively, and the middle layer plate (4) is provided with positioning holes (42) corresponding to the positioning columns (15).

6. The soldering tool for a circuit board according to claim 1, wherein: The fixed base (1) is fixedly provided with a blocking strip (16) at both ends, and the opposite surfaces of the blocking strips (16) at both ends are provided with recessed positioning surfaces (161), and the middle layer plate (4) is arranged between the positioning surfaces (161) of the blocking strips (16) at both ends.

7. The soldering tool for a circuit board according to claim 1, wherein: Corresponding recesses (43) are arranged on both sides of the middle layer plate (4) for easy taking.

8. The soldering tool for a circuit board according to claim 6, wherein: At least two corners of the upper cover (2) are provided with connecting holes (21), and screws arranged in the connecting holes (21) sequentially penetrate the upper cover (2), the blocking strips (16) and the fixed base (1).

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