CN221409264U

CN221409264U - Clamp for selectively welding and positioning lead pin

Info

Publication number: CN221409264U
Application number: CN202323093016.5U
Authority: CN
Inventors: 王春杰
Original assignee: Flextronics Technology Suzhou Co Ltd
Current assignee: Flextronics Technology Suzhou Co Ltd
Priority date: 2023-11-16
Filing date: 2023-11-16
Publication date: 2024-07-23
Anticipated expiration: 2033-11-16

Abstract

The utility model discloses a fixture for selecting welding location l ead pi n, comprising: the fixture comprises a fixture base, a profiling limiting groove, a PCB pressing block, a fixed upper cover, an upper cover pressing block, an upper cover positioning column, a pin needle positioning hole and a pin needle limiting convex part. Through the mode, the fixture for selecting welding positioning l ead pi n provided by the utility model has the advantages that through the multiple groups of positioning structures of the fixture, the fixture base, the PCBA and the upper cover are mutually fixed and positioned, so that the lead pin is ensured not to float, the center distance of the lead pin is ensured to meet the requirement, and meanwhile, the situation that the upper cover cannot be taken off is avoided, so that the positioning accuracy is improved, the product quality is improved, and the working efficiency and the productivity are improved.

Description

Clamp for selectively welding and positioning lead pin

Technical Field

The utility model relates to the technical field of PCBA assembly, in particular to a clamp for selectively welding and positioning lead pins.

Background

In the production and assembly process of PCBA, the following problems often occur in the selection welding at present because the selection welding is needed after the manual plug-in:

1. The bottom of the flange of the material part is uneven, the lead pin cannot be perpendicular to the PCB, the lead pin inclines towards the two sides to cause overlarge center distance, and the inward inclination can cause overlarge center distance;

2. Under the condition that the flatness of the flange of the material part is not considered, the PIN and the hole site of the jig are eccentric in the actual assembly process, for example, when the PIN is at the lowest limit, namely 1.575-0.026=1.549 mm, the hole diameter of the upper end of the jig is at the highest limit, namely 1.7+0.05=1.75 mm; when Pin is at the uppermost limit of the center distance of the cover plate, i.e., 5.8+0.1=5.9 mm, the center distance of Pin is the largest: 5.9+ (1.75/2-1.549/2) x 2 = 6.101; when Pin is at the lowest limit of the center distance of the cover plate, namely 5.8-0.1=5.7 mm, the center distance of Pin is the smallest: 5.7- (1.75/2-1.549/2) 2= 5.499.

Therefore, due to the influences of factors such as PCB aperture tolerance, PCB deformation, flange flatness of the material part and the like, the center distance difference of the post-welding lead pin is large after the selection, and the requirement standard of customers cannot be met.

Disclosure of utility model

The utility model provides a fixture for selectively welding and positioning lead pins, which has the advantages of high reliability, accurate positioning, compact structure and the like, and has wide market prospect in the application and popularization of PCBA assembly.

In order to solve the technical problems, the utility model adopts a technical scheme that:

There is provided a fixture for selectively welding a positioning lead pin, comprising: a jig base, a profiling limit groove, a PCB pressing block, a fixed upper cover, an upper cover pressing block, an upper cover positioning column, a pin needle positioning hole and a pin needle limit convex part,

The profiling limit groove is arranged on the jig base, the PCB pressing block is movably arranged on the outer side of the profiling limit groove, the fixed upper cover is movably arranged on the profiling limit groove so as to cover the PCB, the jig base is provided with the upper cover positioning column movably connected with the fixed upper cover and the upper cover pressing block for pressing or loosening the fixed upper cover,

The pin needle locating hole set up in fixed upper cover is last, just the diameter in pin needle locating hole is from down upwards reducing gradually for the inner wall in pin needle locating hole forms the guide surface of inwards slope, in order to let the lead pin insert pin needle locating hole, and limit the central distance of lead pin through the open-top in pin needle locating hole, thereby fix a position the lead pin, the bottom in pin needle locating hole is provided with the spacing convex part of pin needle, in order to be used for pushing down the lead pin, produces when preventing to cross wave soldering and floats high.

In a preferred embodiment of the present utility model, the periphery of the profiling limiting groove is arranged on the PCB guide block for positioning and fixing the upper cover and the PCB.

In a preferred embodiment of the present utility model, the fixed upper cover is provided with a positioning hole movably connected with the upper cover positioning column.

In a preferred embodiment of the present utility model, the fixed upper cover and the pin needle limit protrusion are in an integrated structure.

In a preferred embodiment of the present utility model, the PCB pressing block and the upper cover pressing block are rotatably disposed on the jig base.

The beneficial effects of the utility model are as follows: through the multiunit location structure of tool for tool base, PCBA, upper cover mutual fixation location guarantee promptly that lead pin can not float high, also guaranteed that lead pin's centre-to-centre spacing satisfies the requirement, also can not appear simultaneously unable condition of taking down the upper cover, not only can improve the accuracy of location, improve the quality of product, improved work efficiency and productivity moreover.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic view of a preferred embodiment of a fixture for selectively welding a positioning lead pin according to the present utility model;

fig. 2 is a schematic view of a preferred embodiment of a fixture for selectively welding and positioning lead pins according to the present utility model.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, an embodiment of the present utility model includes:

A fixture for selectively welding a positioning lead pin, the structure comprising: tool base 1, profile modeling spacing groove 2, PCB briquetting 3, fixed upper cover 4, upper cover briquetting 5, upper cover reference column 6, pin needle locating hole 7 and pin needle spacing convex part 8.

The profiling limiting groove is formed in the jig base and used for placing and limiting the PCB 11, the PCB pressing block is movably arranged on the outer side of the profiling limiting groove and used for pressing or loosening the front portion of the PCB, the fixed upper cover is movably arranged on the profiling limiting groove and covers the PCB, and the jig base is provided with an upper cover positioning column movably connected with the fixed upper cover and an upper cover pressing block used for pressing or loosening the fixed upper cover.

The pin needle locating hole set up in fixed upper cover is last, just the diameter in pin needle locating hole is from down upwards reducing gradually for the inner wall in pin needle locating hole can form the guide surface of inwards slope, not only can let in the pin needle locating hole of leading pin10 smooth, and further guarantee the central distance of leading pin through the open-top in pin needle locating hole, thereby more accurate location leading pin, the bottom in pin needle locating hole is provided with the spacing convex part of pin needle for be used for pushing down leading pin, produce when preventing to cross wave soldering and float high.

Further preferably, the periphery of the profiling limiting groove is arranged on the PCB guide block 9 so as to be used for positioning and fixing the upper cover and the PCB.

Further preferably, the fixed upper cover is provided with a positioning hole movably connected with the upper cover positioning column.

Further preferably, the fixed upper cover and the pin needle limit protruding part are of an integrated structure.

Further preferably, the PCB pressing block and the upper cover pressing block are rotatably disposed on the jig base.

When in use, the PCBA is placed on the bottom plate of the jig, the PCBA is fixed by the PCB pressing block to prevent movement, the upper cover is fixed along the guide block, the upper cover is fixed by the upper cover pressing block and is matched with and inserted into the three positioning lead pins on the corresponding PCBA.

The clamp for selectively welding and positioning the lead pin has the beneficial effects that: through the multiunit location structure of tool for tool base, PCBA, upper cover fixed location each other, the spacing hole of upper cover embolias on the lead pin simultaneously, guarantee promptly that the lead pin can not float high, also guaranteed that the centre-to-centre spacing of lead pin satisfies the requirement, also can not appear simultaneously unable condition of taking down the upper cover, not only can improve the accuracy of location, improve the quality of product, improved work efficiency and productivity moreover.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present utility model.

Claims

1. A fixture for selectively welding a positioning lead pin, comprising: a jig base, a profiling limit groove, a PCB pressing block, a fixed upper cover, an upper cover pressing block, an upper cover positioning column, a pin needle positioning hole and a pin needle limit convex part,

2. The fixture for selectively welding and positioning lead pins of claim 1, wherein the contour limiting groove is circumferentially arranged on the PCB guide block for positioning and fixing the upper cover and the PCB.

3. The fixture for selectively welding and positioning lead pin according to claim 1, wherein the fixed upper cover is provided with a positioning hole movably connected with the upper cover positioning column.

4. The fixture for selectively welding and positioning lead pin as recited in claim 1, wherein said fixed upper cover is of unitary construction with said pin needle stop tab.

5. The fixture for selectively welding and positioning lead pin of claim 1, wherein the PCB press block and the upper cover press block are rotatably disposed on the fixture base.