CN216462344U

CN216462344U - Welding jig

Info

Publication number: CN216462344U
Application number: CN202121222977.XU
Authority: CN
Inventors: 唐先华; 陈立鹏; 占海明; 庄东旭
Original assignee: Shenzhen Zhaoxing Botuo Technology Co ltd
Current assignee: Shenzhen Zhaoxing Botuo Technology Co ltd
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2022-05-10
Anticipated expiration: 2031-06-02

Abstract

The utility model discloses a welding jig, comprising: the supporting disc is used for mounting a circuit board attached with electronic elements and provided with a crimping area, and the crimping area corresponds to the electronic elements attached to the circuit board; the gland is connected with the supporting disc in an opposite mode so as to clamp the circuit board, and one surface, facing the supporting disc, of the gland is provided with a pressing area which is opposite to the crimping area; and the elastic piece is connected to the extrusion area so as to press and joint the electronic element attached to the circuit board. In the welding process of the welding jig, the solder paste between the circuit board and the electronic element is melted to generate the gas soldering flux, the gas soldering flux can extrude the elastic element through the electronic element, and the elastic element can apply corresponding reaction force to the electronic element after receiving the changed acting force, so that the electronic element extrudes the gas soldering flux through the increased extrusion force to reduce the generation of bubbles.

Description

Welding jig

Technical Field

The utility model relates to the technical field of electronic component welding, in particular to a welding jig.

Background

In the related art, an electronic component and a circuit board are mounted by solder paste and then are soldered and fixed by a reflow soldering technique. In the welding process, gas soldering flux generated when solder paste is melted cannot be effectively discharged, so that bubbles can be generated between the circuit board and the electronic element, defective products are generated, and the welding yield of the electronic element and the circuit board is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a welding jig which is used for fixing a circuit board attached with electronic elements and aims to solve the technical problem of how to improve the welding yield of the electronic elements and the circuit board.

In order to achieve the above object, the present invention provides a welding jig comprising:

the supporting disc is used for mounting a circuit board attached with electronic elements and provided with a crimping area, and the crimping area corresponds to the electronic elements attached to the circuit board;

the gland is connected with the supporting disc in an opposite mode so as to clamp the circuit board, and one surface, facing the supporting disc, of the gland is provided with a pressing area which is opposite to the crimping area;

and the elastic piece is connected with the extrusion area so as to press and joint the electronic element attached to the circuit board.

Optionally, the gland is in the extrusion district has seted up the guiding hole, the welding jig still include with the scalable complex guide post of guiding hole, the elastic component cover is located the guide post.

Optionally, a limiting boss is convexly arranged on the peripheral wall of the guide post, the limiting boss is convexly arranged at one end of the guide post protruding out of the extrusion area, and the tail end of the elastic member abuts against the limiting boss.

Optionally, the elastic member is provided as a high temperature resistant spring.

Optionally, the supporting plate is provided with a positioning hole, the gland is convexly provided with a positioning column corresponding to the positioning hole, and the positioning column is in positioning fit with the positioning hole.

Optionally, the positioning columns include first positioning columns and second positioning columns, the first positioning columns and the second positioning columns are respectively adjacent to two opposite sides of the gland, the number of the first positioning columns is two, the first positioning columns are arranged at intervals along the side of the gland, the number of the second positioning columns is two, the second positioning columns are arranged at intervals along the side of the gland, and the distance between the two first positioning columns is greater than the distance between the two second positioning columns;

the number and the positions of the positioning holes correspond to those of the positioning columns.

Optionally, the supporting disk is provided with a magnetic attraction piece, the gland is provided with a magnet corresponding to the magnetic attraction piece, and the supporting disk and the gland are mutually attracted and fixed through the magnetic attraction piece and the magnet.

Optionally, the magnetic attraction piece and the magnet are provided as high temperature resistant magnets.

Optionally, the supporting disk is convexly provided with a positioning rib for positioning and installing the circuit board.

Optionally, the supporting disc is provided with a through hole corresponding to the crimping region.

The welding jig fixes the circuit board through the supporting disc and the gland and then presses and fixes the electronic element on the circuit board through the elastic piece connected to the gland. In the welding process, the solder paste between the circuit board and the electronic element is melted to generate gas soldering flux, the gas soldering flux can extrude the elastic piece through the electronic element, and the elastic piece can apply corresponding reaction force to the electronic element after receiving the changed acting force, so that the electronic element extrudes the gas soldering flux through the increased extruding force to reduce the generation of bubbles.

The pressing and fixing force of the existing welding jig on the electronic element is usually fixed, and the pressing and fixing force is difficult to change along with the generation of bubbles in the welding process, so that the bubbles cannot be squeezed out; therefore, compared with the prior art, the welding jig can improve the welding yield of the electronic element and the circuit board.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of one embodiment of a support tray according to the present invention;

FIG. 2 is a schematic structural view of another embodiment of a support tray according to the present invention;

FIG. 3 is a schematic structural view of an embodiment of the gland of the present invention;

FIG. 4 is a schematic structural view of another embodiment of the gland of the present invention;

fig. 5 is a schematic cross-sectional view of a welding jig according to an embodiment of the utility model.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)	Reference numerals	Name (R)
						10	Support plate	11	Crimping zone	20	Gland
21	Extrusion zone	30	Elastic piece	22	Guide hole
						40	Guide post	41	Spacing boss	12	Locating hole
23	First positioning column	24	Second positioning column	25	Magnet body
						13	Positioning rib	14	Through hole	15	Magnetic part
50	Circuit board	60	Electronic component

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The present invention provides a soldering jig for fixing a circuit board 50 mounted with an electronic component 60. The electronic component 60 is attached to the circuit board 50 by solder paste, and after the circuit board 50 is fixed to the soldering jig, the electronic component 60 can be pressed toward the circuit board 50, and then the soldering jig is placed into a reflow oven for reflow soldering, so that the electronic component 60 is fixed to the circuit board 50.

In an embodiment of the present invention, as shown in fig. 1 to 5, the welding jig includes: the supporting plate 10 is used for mounting a circuit board 50 attached with an electronic element 60, the supporting plate 10 is provided with a crimping area 11, and the crimping area 11 corresponds to the electronic element 60 attached with the circuit board 50; a pressing cover 20 connected opposite to the supporting plate 10 to clamp the circuit board 50, wherein one surface of the pressing cover 20 facing the supporting plate 10 is provided with a pressing area 21, and the pressing area 21 is opposite to the crimping area 11; and an elastic member 30 connected to the pressing area 21 to press-contact the electronic component 60 mounted on the circuit board 50.

The circuit board 50 has a pad, and when the electronic component 60 is mounted, the pad is first coated with solder paste, and then the electronic component 60 is automatically mounted on the pad of the circuit board 50 by an SMT technique. The shape of the support disc 10 may be square or circular, and is not limited herein. The supporting plate 10 is used for supporting the bottom of the circuit board 50, after the circuit board 50 is mounted on the supporting plate 10, the electronic component 60 corresponds to the crimping region 11 of the supporting plate 10, and the electronic component 60 is located on the top surface of the circuit board 50. The shape of the gland 20 corresponds to that of the support plate 10, the gland 20 can press the circuit board 50 to the support plate 10, and the pressing area 21 of the gland 20 presses the electronic element 60 to the circuit board 50 during the pressing process. The specific shape of the elastic member 30 is not limited, and only the elastic member has elasticity and can resist high temperature. After the cover 20 and the support plate 10 are closed, the elastic member 30 connected to the pressing area 21 abuts against the electronic component 60, so as to press and fix the electronic component 60 toward the circuit board 50 by the elastic force.

The support disk 10 and the gland 20 may be connected by a fastener or may be clamped by a clamp, which is not limited herein. The elastic member 30 and the gland 20 may be connected by bonding or scarf joint, which is not limited herein. The elastic contact may directly contact the electronic element 60, or may indirectly contact the electronic element through other structures, which is not limited herein. In practical applications, the number of the elastic members 30 may be multiple, and multiple elastic members 30 are distributed in the pressing area 21 to increase the pressing area and the pressing position of the electrode element, thereby improving the pressing effect.

Since the elastic member 30 generates an elastic force that varies according to the pressure change, that is, when the elastic member 30 receives an increase in pressure from the cover 20 and the electronic component 60, the elastic force of the elastic member 30 to the electronic component 60 also increases.

In the process of heating and welding the circuit board 50 and the electronic element 60, the solder paste between the circuit board 50 and the electronic element 60 is melted to generate gas soldering flux, the gas soldering flux can generate thrust towards the elastic element 30 to the electronic element 60, so that the pressure applied to the elastic element 30 is increased, the compression amount of the elastic element 30 is changed, the elastic reaction force to the electronic element 60 is correspondingly increased, the increased elastic force can drive the electronic element 60 to extrude gas, bubbles are avoided, and the welding yield of the circuit board 50 and the electronic element 60 can be improved.

In addition, when the electronic component 60 is pressed and fixed, the acting force of the elastic member 30 on the electronic component 60 is gradually increased along with the compression of the gland 20 on the elastic member 30, that is, the acting force of the elastic member 30 on the electronic component 60 is not suddenly changed instantly but gradually changed, so that the electronic component 60 can be prevented from slipping due to the fact that the instantaneous acting force is large, the electronic component 60 can be pressed and fixed at a preset position, and the accuracy of the welding position of the electronic component 60 is improved.

The welding jig fixes the circuit board 50 through the supporting plate 10 and the gland 20, and then fixes the electronic element 60 on the circuit board 50 through the elastic element 30 connected to the gland 20, because the elastic element 30 applies elastic reaction force to the electronic element 60, the reaction force can change along with the change of the acting force applied by the elastic element 30. During the soldering process, the solder paste between the circuit board 50 and the electronic component 60 melts to generate the gas flux, the gas flux presses the elastic member 30 through the electronic component 60, and the elastic member 30 applies a corresponding reaction force to the electronic component 60 after receiving the variable acting force, so that the electronic component 60 extrudes the gas flux through the increased extrusion force to reduce the generation of bubbles.

The pressing and fixing force of the existing welding jig on the electronic element 60 is usually fixed, and the pressing and fixing force is difficult to change along with the generation of bubbles in the welding process, so that the bubbles cannot be squeezed out; therefore, compared with the prior art, the welding jig can improve the welding yield of the electronic element 60 and the circuit board 50.

In an embodiment, as shown in fig. 5, the pressing cover 20 has a guiding hole 22 formed in the pressing area 21, the welding jig further includes a guiding post 40 telescopically engaged with the guiding hole 22, and the elastic member 30 is sleeved on the guiding post 40. The guide post 40 protrudes from one surface of the gland 20 facing the support plate 10, and the elastic member 30 is sleeved on the guide post 40 and then abuts against the gland 20. When the gland 20 is pressed toward the support disk 10, the guide post 40 is pressed together with the elastic member 30, and the guide post 40 is pushed into the guide hole 22 while the elastic member 30 is compressed. The guide posts 40 guide the deformation direction of the elastic member 30 and prevent the elastic member 30 from bouncing off the pressing area 21 when being stressed, thereby improving the stability of the stress process of the elastic member 30.

Specifically, as shown in fig. 5, a limiting boss 41 is convexly provided on the peripheral wall of the guide post 40, the limiting boss 41 is convexly provided at one end of the guide post 40 protruding from the squeezing area 21, and the end of the elastic element 30 abuts against the limiting boss 41. The limiting boss 41 can limit the elastic element 30, one end of the elastic element 30 abuts against the limiting boss 41, and the other end of the elastic element 30 abuts against the gland 20, so that the elastic element 30 can be prevented from being separated from the guide post 40 along the axial direction, and the installation stability of the elastic element 30 can be improved. The limit boss 41 may extend along the circumferential direction of the guide post 40 to increase a contact area with the elastic member 30, thereby improving the limit stability of the elastic member 30. The perisporium of guide post 40 other end can protruding establish spacing muscle, and spacing muscle butt deviates from the one side of elastic component 30 in gland 20 to prevent that guide post 40 from breaking away from the wire guide, improve guide post 40's installation stability.

In practical application, the elastic member 30 is a high temperature resistant spring, so that the elastic member 30 has sufficient structural strength, and can maintain sufficient elasticity after being heated, thereby ensuring the stability of the overall structure of the welding jig.

In one embodiment, the length of the elastic member 30 is set to 3cm to 5 cm; and/or, the diameter of the elastic member 30 is set to be 2mm to 4 mm. Note that the diameter of the elastic member 30 refers to the outer diameter. Set up the length of elastic component 30 to 3cm to 5cm, the diameter sets up to 2mm to 4mm, and the elastic coefficient of cooperation elastic component 30 can be on the basis of guaranteeing structural strength reasonable control elastic component 30 is compressed the elastic force that produces back to avoid elastic force too little and partly effectively extrude gas, or prevent that elastic force is too big and crush electronic component 60.

In an embodiment, as shown in fig. 1, 2 and 5, the supporting plate 10 is provided with a positioning hole 12, and the pressing cover 20 is protruded with a positioning post corresponding to the positioning hole 12, and the positioning post is in positioning fit with the positioning hole 12. When the pressing cover 20 presses the supporting disk 10, the positioning column is matched with the positioning hole 12, so that the elastic member 30 is accurately aligned with the pressing connection area 11, the elastic member 30 is accurately pressed on the electronic element 60, and the pressing connection effect is ensured. The number of the positioning columns and the positioning holes 12 can be multiple, so that the positioning positions of the supporting disc 10 and the gland 20 are increased, and the positioning accuracy is further improved.

Specifically, as shown in fig. 1 and fig. 3, the positioning posts include first positioning posts 23 and second positioning posts 24, the first positioning posts 23 and the second positioning posts 24 are respectively adjacent to two opposite sides of the gland 20, the number of the first positioning posts 23 is two and is arranged at intervals along the side of the gland 20, the number of the second positioning posts 24 is two and is arranged at intervals along the side of the gland 20, and the interval between the two first positioning posts 23 is greater than the interval between the two second positioning posts 24; the number and the positions of the positioning holes 12 correspond to those of the positioning columns.

The distance between the two first positioning posts 23 and the distance between the two second positioning posts 24 are different, so that the preset side of the gland 20 can be accurately positioned on the preset side of the supporting plate 10, the fool-proof effect is achieved, the wrong direction of the gland 20 is avoided, and the elastic member 30 can be accurately pressed on the electronic element 60.

In one embodiment, as shown in fig. 5, the supporting plate is mounted with a magnetic element 15, the gland 20 is mounted with a magnet 25 corresponding to the magnetic element 15, and the supporting plate and the gland 20 are mutually attracted and fixed by the magnetic element 15 and the magnet 25. The bottom of the supporting disk is provided with a mounting groove, and the magnetic suction piece 15 is mounted in the mounting groove; the top surface of the gland 20 is provided with an embedded groove, and the magnet 25 is arranged in the embedded groove; the position of the magnetic element 15 corresponds to the position of the magnet 25. The magnetic attraction piece 15 and the magnet 25 can attract each other, so that the gland 20 and the support plate 10 can attract each other. The pressing cover 20 can continuously apply magnetic force to the elastic member 30, so that the elastic member 30 can continuously adjust the elastic reaction force of the elastic member 30 along with the change of the force, and through the cooperation of the magnetic force and the elastic force, the pressure on the electronic element 60 can reach dynamic balance instead of static balance, so that the pressure on the electronic element 60 can be automatically adjusted along with the generation of gas, and the extrusion effect of the gas can be improved.

Specifically, the magnetic attraction member 15 and the magnet 25 are configured as high temperature resistant magnets to maintain sufficient magnetism in a high temperature environment where the electronic component 60 and the circuit board 50 are soldered, so as to generate sufficient magnetic attraction force to press and fix the electronic component 60.

In one embodiment, as shown in fig. 1 and 5, the supporting plate is protruded with positioning ribs 13 for positioning and mounting the circuit board 50. The positioning groove is formed in the circuit board 50 and matched with the positioning ribs 13, the circuit board 50 can be stably and fixedly located in the preset area of the supporting plate 10, and the circuit board 50 is prevented from deviating in the stress process, so that the installation stability of the circuit board 50 is improved.

Specifically, as shown in fig. 5, the support plate 10 is opened with a through hole 14 corresponding to the crimping region 11. The through holes 14 can reduce the supporting and abutting of the supporting disk 10 on the circuit board 50 in the crimping area 11, when the elastic member 30 is crimped on the electronic element 60, the pressure is transmitted to the circuit board 50, due to the existence of the through holes 14, the circuit board 50 can slightly deform so as to generate a slight elastic reaction force on the electronic element 60 under the tendency of recovering deformation, that is, when the gas soldering flux is generated, the extrusion forces from the circuit board 50 and the electronic element 60 are opposite elastic forces, and both the elastic forces can be increased along with the generation of the gas soldering flux, so that the gas can be more fully extruded, and the welding yield can be further improved.

The above description is only an alternative embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, which are within the spirit of the present invention, are included in the scope of the present invention.

Claims

1. The utility model provides a welding jig for fixed circuit board that pastes and is equipped with electronic component, its characterized in that, welding jig includes:

2. The welding jig of claim 1, wherein the pressing cover has a guiding hole in the pressing area, the welding jig further comprises a guiding post telescopically engaged with the guiding hole, and the elastic member is sleeved on the guiding post.

3. The welding jig of claim 2, wherein the peripheral wall of the guide post projection is provided with a limiting boss, the limiting boss is convexly arranged at one end of the guide post projecting from the extrusion area, and the tail end of the elastic member abuts against the limiting boss.

4. The welding jig of any one of claims 1 to 3, wherein the elastic member is configured as a high temperature resistant spring.

5. The welding jig according to any one of claims 1 to 3, wherein the supporting plate is provided with a positioning hole, the pressing cover is provided with a positioning post protruding from the supporting plate and corresponding to the positioning hole, and the positioning post is in positioning fit with the positioning hole.

6. The welding jig of claim 5, wherein the positioning posts comprise first positioning posts and second positioning posts, the first positioning posts and the second positioning posts are respectively adjacent to two opposite sides of the gland, the first positioning posts are two and are arranged at intervals along the side of the gland, the second positioning posts are two and are arranged at intervals along the side of the gland, and the distance between the two first positioning posts is greater than the distance between the two second positioning posts;

7. The welding jig of any one of claims 1 to 3, wherein the supporting plate is provided with a magnetic element, the gland is provided with a magnet corresponding to the magnetic element, and the supporting plate and the gland are mutually fixed by the magnetic element and the magnet.

8. The welding jig of claim 7, wherein the magnetically attractive element and the magnet are configured as high temperature resistant magnets.

9. The welding jig of any one of claims 1 to 3, wherein the supporting plate is provided with a positioning rib protruding for positioning and installing a circuit board.

10. The welding jig of any one of claims 1 to 3, wherein the support disc is provided with a through hole corresponding to the crimping zone.