Manual welding and positioning die for contact pin

Abstract

The utility model discloses a manual welding and positioning die for a pin. The manual welding and positioning die comprises a positioning column and a pin plate, the pin plate is connected with the positioning columns, the thickness is not less than 3mm, and the pins are prevented from turning laterally; the pin plate is provided with a positioning hole for positioning the vertical angle of a pin and the position of a pin welding spot. If the pin plates at the same height cannot meet various pin welding requirements, the side, facing the circuit, of each pin plate is designed to be step-shaped. The manual welding positioning die is suitable for manual welding positioning of cross-shaped contact pins and T-shaped contact pins, can ensure accurate positioning of the manual welding contact pins, is simple to operate, and can effectively improve the welding efficiency and the rate of finished products.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pin manual welding positioning mould, concretely to a manual welding positioning mould suitable for cross pin and T-shaped pin. BACKGROUND

[0002] Manual welding lead pin classification is more, and common has row pin, cross pin, T-shaped pin, two head round needle, four square needle etc., and cross pin and T-shaped pin are often used as the surface pad lead of circuit board such as PCB, ceramic substrate.

[0003] Pin welding is located after circuit board and shell base assembly, and the method is manual welding: tin is respectively ladled in pad and pin welding end, one hand uses pincers to take pin and adjusts it to vertical direction with pad, and the other hand uses soldering iron to heat pad and pin welding end to its connection; remove soldering iron, until tin solidifies, remove pincers, and pin welding is completed. The process has the following difficulties:

[0004] 1, pin vertical direction manual adjustment exists angle error;

[0005] 2, pin positioning in pad exists horizontal direction error;

[0006] 3, subsequent circuit board and shell base assembly offset.

[0007] The above difficulties can lead to subsequent shell base and cap assembly process and power-on test process cannot be normally positioned, a large number of rework reduces circuit assembly first-time qualification rate and causes quality hidden danger. Therefore, a pin manual welding auxiliary positioning mould needs to be designed. SUMMARY

[0008] The utility model discloses a kind of pin manual welding positioning mould, suitable for the manual welding positioning of cross pin and T-shaped pin, using the mould can ensure that pin is positioned accurately by manual welding, it is simple to operate, can effectively improve welding efficiency, yield.

[0009] To achieve the above goal, the utility model adopts the following technical scheme: a pin manual welding positioning mould, characterized by comprising positioning column, pin plate;Pin plate is connected with positioning column, and the thickness is not less than 3mm, to avoid pin rollover;Pin plate is equipped with positioning hole to position pin vertical angle and pin welding point position;If the same height pin plate cannot adapt to multiple pin welding requirements, pin plate side facing circuit should be designed as stepped.

[0010] Further, the positioning column is positioned with the shell base contour of circuit and does not block welding operation, and the size of the positioning hole is determined by the diameter of the non-welding end of the pin.

[0011] Further, when the shell base has no less than three circular positioning holes or circular arc limiting structures, no less than three cylindrical positioning columns are designed; when the shell base has no positioning hole or circular arc limiting structure, the base outer corner is positioned, and no less than three right-angle positioning columns are designed.

[0012] Further, the diameter of the cylindrical positioning column is 0.2mm smaller than the diameter of the circular positioning hole or circular arc limiting structure of the shell base.

[0013] Further, the thickness of the right-angle positioning column is no less than 2mm.

[0014] During assembly, the pin plate must be higher than the pin pad by more than 10mm to facilitate welding assembly; the pin plate must be higher than the maximum diameter position of the cross pin or T-shaped pin by more than 1mm to ensure that the mold is taken out vertically after welding.

[0015] During use, the non-welding end of the cross pin or T-shaped pin is passed through the corresponding positioning hole on the pin plate facing the circuit side, then the positioning column is placed at the corresponding position of the shell base, and the welding end of the pin falls vertically on the corresponding pad under the action of gravity, and the pin positioning is completed. After welding, the positioning mold is lifted along the vertical direction, the positioning mold is separated from the pin, and the pin welding is completed.

[0016] The utility model has the following beneficial effects:

[0017] 1. The pin angle is calibrated by using the positioning mold, and errors caused by manual adjustment are avoided;

[0018] 2. The positioning mold accurately positions the pin to the position of the corresponding pad, and deviation is avoided;

[0019] 3. The pin is positioned by using the shell base contour, which can effectively avoid the situation that the pin and the shell cap cannot be aligned due to the deviation of the circuit and the shell base assembly alignment;

[0020] 4. The positioning mold material is aluminum, which can be used on the heating table without deformation, has a long service life and extremely low maintenance cost. DRAWINGS

[0021] Figure 1 It is a structure schematic view of the utility model embodiment 1;

[0022] Figure 2 It is a mold assembly drawing of the utility model embodiment 1 welding process;

[0023] Figure 3 It is a structure schematic view of the utility model embodiment 2;

[0024] Figure 4 It is a mold assembly drawing of the utility model embodiment 2 welding process;

[0025] Explanation of reference numerals: cylindrical positioning column 11, rectangular pin plate 12; positioning hole 13; shell base 20; arc limiting structure 21; T-shaped pin 30; T-shaped pin welding end 31; cross pin 40; cross pin welding end 41; right-angle positioning column 51, stepped pin plate 22. DETAILED DESCRIPTION

[0026] As shown in Figure 1 , the positioning mold in Example 1 is provided with 6 cylindrical positioning columns 11, and the rectangular pin plate 12 is provided with 10 positioning holes 13.

[0027] Figure 2 The mold assembly diagram for the welding process of Example 1 is shown. The shell base 20 has 6 arc limiting structures 21 on both sides. When in use, the non-welding end of the 9 T-shaped pins 30 is passed through the corresponding positioning hole 13 on the side of the pin plate 12 facing the circuit, and the 6 cylindrical positioning columns 11 are inserted into the 6 arc limiting structures 21, completing the installation of the positioning mold. In this embodiment, the welding positions of the T-shaped pins 30 are symmetrical on the left and right, and the design of 10 positioning holes 13 allows the positioning mold to have no installation direction requirement, making it more convenient to use. The welding end 31 of the T-shaped pin 30 in this embodiment is relatively flat, and the rest have the same diameter. The height of the pin plate 12 only needs to be 10 mm higher than the height of the solder pad. The two sides of the positioning hole 13 are fully open structures and do not block the welding operation. After welding is completed, the pin plate 12 is lifted slightly in the vertical direction, so that the T-shaped pins 30 are separated from the positioning holes 13, and the pin welding is completed.

[0028] As shown in Figure 3 , the positioning mold in Example 2 is provided with 4 right-angle positioning columns 51, and the stepped pin plate 22 is provided with 6 positioning holes 13.

[0029] Figure 4The mold assembly diagram for the welding process of Example 2 is shown. In this example, the pins are T-shaped pins 30 and cross-shaped pins 40. The T-shaped pins 30 have the largest diameter at the lower end, and the welding end is 31. The cross-shaped pins 40 have the largest diameter at the middle upper part, and the welding end of the cross-shaped pins is 41. Since the shell base 20 does not have a circular or arc limiting structure, the shell base 20 is positioned by the outer corners, and four right-angle positioning columns 51 are designed. In use, the non-welding ends of the two different types of pins are inserted into the corresponding positioning holes 13 from the circuit-facing side of the stepped pin plate 22, the four right-angle positioning columns 51 clamp the four outer corners of the shell base 20, and the positioning mold installation is completed. In this example, since the cross-shaped pins 40 have the largest diameter at the middle upper part, the height of the stepped pin plate 22 at this position should be 1 mm higher than the largest diameter position of the cross-shaped pins 40. If the same height pin plate is designed based on this height, it will result in insufficient effective positioning length of the T-shaped pins 30, so the circuit-facing side of the stepped pin plate 22 should be designed as stepped. After welding is completed, the stepped pin plate 22 is moved in the vertical direction, so that all the pins are separated from the positioning holes 13, and the pin welding is completed.

Claims

1. A pin hand soldering positioning mold characterized by, The positioning column and the pin plate are connected, and the thickness is not less than 3 mm to avoid the pin from turning over; the pin plate is provided with a positioning hole to position the vertical angle of the pin and the position of the pin welding point; if the pin plate of the same height cannot adapt to the welding requirements of various pins, the side of the pin plate facing the circuit is designed as a stepped shape. The positioning column is positioned according to the outline of the shell base of the circuit and does not block the welding operation, and the size of the positioning hole is determined by the diameter of the non-welding end of the pin.

2. A pin hand soldering positioning jig as claimed in claim 1, wherein When the shell base has not less than 3 circular positioning holes or circular arc limiting structures, not less than 3 cylindrical positioning columns are designed; when the shell base has no positioning hole or circular arc limiting structure, the base outer angle is positioned, and not less than 3 right-angle positioning columns are designed.

3. A pin hand soldering positioning jig as claimed in claim 2, wherein The diameter of the cylindrical positioning column is less than the diameter of the circular positioning hole or the circular arc limiting structure of the shell base by 0.2 mm.

4. A pin hand soldering positioning jig as claimed in claim 3, wherein The thickness of the right-angle positioning column is not less than 2 mm.

5. A pin hand soldering positioning jig as claimed in claim 3, wherein ​

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