CN219944881U - Welding fixture - Google Patents

Abstract

The utility model discloses a welding tool, which belongs to the technical field of surface mounting of circuit boards, and comprises the following components: the device comprises a first connecting block, a second connecting block, a movable lock catch, a locking block, a plurality of jacking structures and a limiting structure; the first connecting block and the second connecting block are arranged in a relatively opening and closing manner; the movable lock catch is arranged on the side face of the first connecting block; the circuit board to be welded and the element to be welded can be limited and placed on the second connecting block; the limiting structure is used for positioning and connecting the edges of the circuit board; each element is respectively connected in a pressing way through a plurality of jacking column structures; so that each containing cavity arranged on the second connecting block can be placed into a tin block; the separation strip is used for avoiding the defects of tin connection and the like caused by the fact that tin of a single bonding pad on the circuit board exceeds a preset amount due to the fact that two tin blocks are simultaneously melted in the same area during temperature rising. Therefore, the utility model solves the technical problem of how to put the tin block on the circuit board according to the preset position.

Description

Welding fixture

Technical Field

The utility model relates to the technical field of surface mounting of circuit boards, in particular to a welding tool.

Background

At present, china becomes a large country for manufacturing electronic information, and the electronic industry plays an important role in market economy. Therefore, in order to consolidate and improve the core competitiveness of enterprises in the market, electronic manufacturers enhance the quick response capability to the market; how to improve the manufacturing accuracy and the production efficiency to pursue greater economic benefits has become the most urgent problem. Currently, a large number of scientific research institutions, research and development enterprises, manufacturers and researchers have conducted a large amount of researches on technological improvement, quality control, efficiency improvement and the like of each process of an SMT production line.

Based on the disclosure materials in the prior art, SMT surface mounting is mainly divided into three stages: in the printing stage, solder paste is deposited on corresponding bonding pads of the PCB through openings prepared in a steel mesh under the rolling of a scraper of a printer. In the mounting stage, the components are sucked, transferred and mounted at corresponding positions on the PCB through the suction nozzle of the chip head on the chip mounter. And in the reflow stage, the solder paste and the components are welded in a reflow furnace by the high Wen Wancheng solder paste, and the original electronic and mechanical properties of the surface-mounted element are maintained.

In the mounting stage, the user needs to fix the product in advance by using the tool fixture, so that the components can be properly placed. Based on this, chinese patent CN108901136a discloses a positioning fixture for welding SMT tray patch elements, which comprises a base, a plurality of positioning mechanisms are sequentially arranged on the front side surface of the base from top to bottom, the plurality of positioning mechanisms are uniformly distributed on the base at equal intervals between every two adjacent positioning mechanisms, two propping mechanisms are symmetrically arranged on two sides of each positioning mechanism, and the two propping mechanisms are both arranged on the front side surface of the base. The positioning tool can realize the position fixation of a plurality of PCB boards at one time through the matching of the positioning mechanism and the abutting mechanism, improves the speed of fixing the PCB boards by operators, and is convenient for the operators to weld the SMT tray patch elements.

However, in the conventional surface mounting process, when a user mounts a connector, a stud or other plug-in unit, the user needs to place a tin bar near the insertion hole of the component to be mounted in advance, and then pass the component through a furnace to melt the tin bar so that the component is firmly mounted on the circuit board. In the process practice, the use of quantitative tin blocks has been found to have a better mounting effect. The positioning tool for welding disclosed in the prior art cannot be adapted to the assembly of the insert and the tin block. Specifically, the user needs to put the tin block near the jack of the plug-in advance at the pre-position of the circuit board, and as the defects of tin connection and the like can not occur between different jacks, the structure optimization of the existing welding tool is needed, so that the existing welding tool is suitable for the limit placement of the tin block.

Disclosure of Invention

Based on this, it is necessary to provide a welding tool for solving the technical problem of how to place the tin block on the circuit board according to the preset position.

A welding fixture, comprising: the device comprises a first connecting block, a second connecting block, a movable lock catch, a locking block, a plurality of jacking structures and a limiting structure; the first connecting block and the second connecting block are arranged in a relatively opening and closing manner; the two sides of the first connecting block are respectively provided with the movable lock catches; each movable lock catch is provided with two lock catch installation blocks, two movable lock catches and a lock catch connecting block; the side surface of each lock catch installation block is hinged with one movable buckle; the two movable buckles are connected through one lock catch connecting block. The locking blocks are distributed on the second connecting block corresponding to each movable buckle; each locking block is correspondingly and movably connected with one movable buckle. The plurality of top column structures are uniformly distributed on the first connecting block; each jack-prop structure is provided with a movable sleeve, a jack-prop and a pressing block. The movable sleeve is connected to the first connecting block; the jacking column is movably sleeved in the movable sleeve; the briquetting set up in the tip of jack-prop. The second connecting block is provided with a plurality of accommodating cavities and a plurality of separating strips; the accommodating cavity is arranged in the second connecting block corresponding to the pressing block; every two accommodating cavities are separated by the separating strip. The limiting structure is arranged between the second connecting block and the first connecting block; the limiting structure is used for limiting and connecting the external circuit board materials placed on the second connecting block.

Further, a plurality of welding clearance grooves are formed in the first connecting block; the welding clearance grooves are uniformly arranged.

Furthermore, a plurality of clamping structures are arranged in the second connecting block, and the clamping structures are arranged below the welding avoidance groove.

Furthermore, a plurality of guiding connection blocks are further arranged between the first connection block and the second connection block.

Furthermore, the plurality of guide connection blocks are uniformly arranged on the periphery of the second connection block, and each guide connection block is provided with a guide hole.

Further, a plurality of guide posts are arranged on the periphery of the first connecting block.

Furthermore, each guide post is correspondingly and movably connected with one guide hole in a pairing way.

Furthermore, the limiting structure is provided with a plurality of right-angle limiting blocks and two rotary pressing blocks.

Furthermore, the right-angle limiting blocks are uniformly arranged on the second connecting block; every two right-angle limiting blocks are respectively in limiting connection with two opposite angles of the external circuit board material.

Furthermore, two rotary pressing blocks are movably connected to the second connecting block, and every two rotary pressing blocks are respectively and oppositely arranged at two sides of the external circuit board material.

In summary, the welding fixture is provided with the first connecting block, the second connecting block, the movable lock catch, the locking block, the plurality of jacking structures and the limiting structure respectively; the first connecting block and the second connecting block are arranged in a relatively opening and closing manner; the movable lock catch is arranged on the side face of the first connecting block and can be movably buckled with the locking block arranged on the second connecting block; the circuit board to be welded and the element to be welded can be limited and placed on the second connecting block; the limiting structure is used for positioning and connecting the edges of the circuit board; each element is respectively connected in a pressing way through a plurality of jack-prop structures; so that each containing cavity arranged on the second connecting block can be placed into a tin block; the separation strip is used for avoiding the bad defects of tin connection and the like caused by the fact that tin of a single bonding pad on the circuit board exceeds a preset amount due to the fact that two tin blocks are simultaneously melted in the same area during temperature rising. Therefore, the welding tool solves the technical problem of how to place the tin block on the circuit board according to the preset position.

Drawings

FIG. 1 is a schematic structural view of a welding fixture according to the present utility model;

FIG. 2 is a schematic diagram of an explosion structure of a welding tool according to the present utility model

FIG. 3 is a schematic view of another direction of a welding tool according to the present utility model;

fig. 4 is a schematic view of a part of a structure of a welding tool according to the present utility model.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 to 4, a welding tool of the present utility model includes: the device comprises a first connecting block 1, a second connecting block 2, a movable lock catch 3, a locking block 4, a plurality of jacking structures 5 and a limiting structure 6; the first connecting block 1 and the second connecting block 2 are arranged in an opening and closing mode relatively; the two sides of the first connecting block 1 are respectively provided with a movable lock catch 3; each movable lock catch 3 is provided with two lock catch installation blocks 301, two movable lock catches 302 and a lock catch connection block 303; the side surface of each lock catch mounting block 301 is hinged with a movable buckle 302; the two movable buckles 302 are connected through one lock catch connecting block 303. The locking block 4 is distributed on the second connecting block 2 corresponding to each movable buckle 302; each locking block 4 is movably connected with one movable buckle 302. The plurality of top column structures 5 are uniformly distributed on the first connecting block 1; each of the post structures 5 has a movable sleeve 501, a post 502, and a press 503. The movable sleeve 501 is connected to the first connecting block 1; the top column 502 is movably sleeved in the movable sleeve 501; the pressing block 503 is disposed at an end of the top pillar 502. The second connecting block 2 is provided with a plurality of accommodating cavities 201 and a plurality of separating strips 202; the accommodating cavity 201 is disposed in the second connecting block 2 corresponding to the pressing block 503; every two accommodating cavities 201 are separated by the separating strip 202. The limiting structure 6 is arranged between the second connecting block 2 and the first connecting block 1; the limiting structure 6 is used for limiting and connecting the external circuit board materials placed on the second connecting block 2.

Specifically, when the welding tool is in a working flow, a user needs to install and place the circuit board materials to be assembled on the second connecting block 2 through the limiting structure 6; then, the plugs to be plugged on the circuit board materials are placed to preset positions on the circuit board one by one, and the placing process can be carried out manually by workers or automatically by using a mechanical arm. After all the plug-in materials are placed, the first connecting block 1 is closed and connected with the second connecting block 2 correspondingly; aligning the movable lock catches 3 with the locking blocks 4, and enabling each jack post structure 5 to correspond to each plug-in piece placed on the circuit board; then, the user pulls the movable buckle 302 to correspondingly buckle into the locking block 4; thereby completing the locking connection of the circuit board material and the plug-in material. When the top pillar structure 5 is aligned with an insert; the pressing block 503 is used for pressing and positioning the plug-in unit; the pins 502 may be retracted along the guides of the movable sleeve 501 as the press block 503 compresses the insert, thereby avoiding damaging the components. Finally, after the circuit board and the plug are properly limited, the user faces the second connection block 2 upwards so that a tin block can be placed in each accommodating cavity 201; the separation strip 202 is used for avoiding the bad defects of tin connection and the like caused by that two tin blocks are simultaneously melted in the same area when the temperature is raised, so that the tin of a single bonding pad on the circuit board exceeds a preset amount. Each accommodating cavity 201 corresponds to a bonding pad on a circuit board; therefore, the tin blocks can be placed on the circuit board according to the preset positions.

Further, a plurality of welding clearance grooves 101 are formed in the first connecting block 1; the welding clearance grooves 101 are uniformly arranged. A plurality of clamping structures 203 are arranged in the second connecting block 2, and the clamping structures 203 are arranged below the welding clearance groove 101. Specifically, in order to further increase the use convenience of the welding tool disclosed by the utility model; a plurality of welding clearance grooves 101 can be formed in the first connecting block 1, so that an external welding mechanical arm can conveniently extend into the welding clearance grooves from the welding clearance grooves to realize welding processing of the other surface of the circuit board to be processed; at this time, the clamping structure 203 provided on the second connection block 2 may clamp the external material to be welded.

Further, a plurality of guiding connection blocks 7 are further arranged between the first connection block 1 and the second connection block 2; the guide connection blocks 7 are uniformly arranged on the periphery of the second connection block 2, and each guide connection block 7 is provided with a guide hole 701. A plurality of guide posts 102 are arranged on the periphery of the first connecting block 1; each guide post 102 is correspondingly and movably connected with one guide hole 701 in a pairing manner. Specifically, in order to make the first connection block 1 and the second connection block be connected in a pairing manner, each of the top pillar structures 5 can be accurately aligned with each element to be welded; a plurality of guide posts 102 and the guide connection blocks 7 can be respectively arranged in the first connection block 1 and the second connection block 2; each of the jack-post structures 5 may be placed at a predetermined position while the guide posts 102 and the guide holes 701 provided in the guide connection block 7 are coupled in a mating manner.

Further, the limiting structure 6 is provided with a plurality of right-angle limiting blocks 601 and two rotating pressing blocks 602; the right-angle limiting blocks 601 are uniformly arranged on the second connecting block 2; every two right-angle limiting blocks 601 are respectively in limiting connection with two opposite angles of the external circuit board material. Two rotary press blocks 602 are movably connected to the second connecting block 2, and each two rotary press blocks 602 are respectively and oppositely arranged at two sides of the external circuit board material. Specifically, the right-angle limiting block 601 may enable the material of the external circuit board to be placed on a preset position, so that the top pillar structure 5 may be accurately aligned to each element to be welded; at least two right-angle limiting blocks 601 can be used and are arranged on the opposite angles of the external circuit board in a diagonal mode. The rotary pressing blocks 602 are respectively and movably arranged on two side surfaces of the external circuit board, and the rotary pressing blocks 602 are movably connected to the second connecting block 2; therefore, after the user places the circuit board material between the right-angle limiting blocks 601, the rotating pressing block 602 can be rotated to press the edge of the circuit board, so that the limiting installation of the circuit board is completed.

In summary, the welding fixture of the utility model is provided with the first connecting block 1, the second connecting block 2, the movable lock catch 3, the locking block 4, the plurality of jack-prop structures 5 and the limiting structure 6 respectively; the first connecting block 1 and the second connecting block 2 are arranged in an opening and closing mode relatively; the movable lock catch 3 is arranged on the side surface of the first connecting block 1 and can be movably buckled with the locking block 4 arranged on the second connecting block 2; the circuit board to be welded and the element to be welded can be limited and placed on the second connecting block 2; the limiting structure 6 is used for positioning and connecting the edges of the circuit board; each element is respectively connected in a pressing way through a plurality of jacking column structures 5; so that each of the accommodating chambers 201 provided on the second connecting block 2 can be placed into a tin block; the separation strip 202 is used for avoiding the bad defects of tin connection and the like caused by that two tin blocks are simultaneously melted in the same area when the temperature is raised, so that the tin of a single bonding pad on the circuit board exceeds a preset amount. Therefore, the welding tool solves the technical problem of how to place the tin block on the circuit board according to the preset position.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The utility model provides a welding frock which characterized in that, it includes: the device comprises a first connecting block (1), a second connecting block (2), a movable lock catch (3), a locking block (4), a plurality of jacking structures (5) and a limiting structure (6); the first connecting block (1) and the second connecting block (2) are arranged in a relatively opening and closing manner; the two sides of the first connecting block (1) are respectively provided with a movable lock catch (3); each movable lock catch (3) is provided with two lock catch installation blocks (301), two movable lock catches (302) and a lock catch connecting block (303); the side surface of each lock catch installation block (301) is hinged with a movable buckle (302); the two movable buckles (302) are connected through a lock catch connecting block (303); the locking blocks (4) are distributed on the second connecting block (2) corresponding to each movable buckle (302); each locking block (4) is correspondingly and movably connected with one movable buckle (302); the plurality of top column structures (5) are uniformly distributed on the first connecting block (1); each jack-prop structure (5) is provided with a movable sleeve (501), a jack-prop (502) and a pressing block (503); the movable sleeve (501) is connected to the first connecting block (1); the top column (502) is movably sleeved in the movable sleeve (501); the pressing block (503) is arranged at the end part of the jacking column (502); the second connecting block (2) is provided with a plurality of accommodating cavities (201) and a plurality of separating strips (202); the accommodating cavity (201) is arranged in the second connecting block (2) corresponding to the pressing block (503); every two accommodating cavities (201) are separated by the separating strip (202); the limiting structure (6) is arranged between the second connecting block (2) and the first connecting block (1); the limiting structure (6) is used for limiting and connecting the external circuit board materials placed on the second connecting block (2).

2. The welding fixture of claim 1, wherein: a plurality of welding clearance grooves (101) are formed in the first connecting block (1); the welding clearance grooves (101) are uniformly arranged.

3. A welding fixture as defined in claim 2, wherein: a plurality of clamping structures (203) are arranged in the second connecting block (2), and the clamping structures (203) are arranged below the welding avoidance groove (101).

4. A welding fixture as defined in claim 3, wherein: a plurality of guide connecting blocks (7) are further arranged between the first connecting block (1) and the second connecting block (2).

5. The welding fixture of claim 4, wherein: the guide connecting blocks (7) are uniformly arranged on the periphery of the second connecting block (2), and each guide connecting block (7) is provided with a guide hole (701).

6. The welding fixture of claim 5, wherein: the periphery of the first connecting block (1) is provided with a plurality of guide posts (102).

7. The welding fixture of claim 6, wherein: each guide post (102) is correspondingly and movably connected with one guide hole (701) in a pairing way.

8. The welding fixture of claim 7, wherein: the limiting structure (6) is provided with a plurality of right-angle limiting blocks (601) and two rotary pressing blocks (602).

9. The welding fixture of claim 8, wherein: the right-angle limiting blocks (601) are uniformly arranged on the second connecting block (2), and every two right-angle limiting blocks (601) are respectively in limiting connection with two opposite angles of an external circuit board material.

10. The welding fixture of claim 9, wherein: two rotary press blocks (602) are movably connected onto the second connecting block (2), and every two rotary press blocks (602) are respectively and oppositely arranged on two sides of an external circuit board material.