PCB drilling positioning jig

Abstract

The utility model discloses a PCB drilling positioning jig which comprises a workbench, a bottom plate is stacked on the workbench, a machining cover plate is arranged above the bottom plate, the machining cover plate is used for pressing a PCB on the upper end face of the bottom plate, the bottom plate is used for separating the workbench and the PCB, at least two PIN grooves are formed in the top of the workbench, and the PIN grooves are used for being connected with positioning pins in a clamping mode. The tops of the positioning pins are used for sequentially penetrating through the bottom plate, the PCB and the machining cover plate, the workbench achieves PCB positioning through the at least two positioning pins, operation is easy, and the drilling positioning efficiency is high. And the PIN grooves and the positioning pins can be repeatedly used for positioning, so that the drilling and positioning cost of the workbench is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit boards, in particular to a PCB drilling positioning fixture. Background Art

[0002] There are two positioning methods for PCB drilling processing, one is the bakelite pin positioning method, and the other is the TWOPIN positioning method.

[0003] The method of planting pins on bakelite is to set a first positioning hole on the bakelite, set a second positioning hole on the PCB, align the first positioning hole with the second positioning hole, and then plant the pins. However, the method of planting pins on bakelite has shortcomings: when changing the PCB model, the bakelite needs to be re-drilled on site, and it takes a long time to replace the positioning PCB, and the efficiency of replacing the PCB is low. Moreover, there are already positioning holes drilled on the bakelite, and adding positioning holes to the bakelite may result in double drilling, resulting in unstable positioning of the pins on the bakelite.

[0004] The TWO PIN positioning method is to connect the pad with a pin below the PCB board, and to stick an aluminum sheet on the top of the PCB board with tape. After the aluminum sheet, PCB board, and pad are connected into one, they are positioned with the workbench. For example, a Chinese patent with announcement number CN204291591U discloses a PCB drilling plate fixture, including a base, and a bottom plate for mounting an aluminum plate is provided on the base. Corresponding positioning holes are provided between the base, the bottom plate, the aluminum sheet, and the aluminum plate, and the base, the bottom plate, the aluminum sheet, and the aluminum plate are fixedly connected by bolts passing through the positioning holes. Mutually symmetrical slide grooves are provided on both sides of the base, and the slide grooves are used to dock with the workbench. However, the above-mentioned PCB drilling plate fixture has the following problems: after the base, the bottom plate, the aluminum sheet, and the aluminum plate are fixedly connected into one by bolts, they also need to be fixedly connected with the workbench, and the positioning process is complicated, resulting in low drilling efficiency. In view of this, the utility model proposes a PCB drilling positioning fixture to solve the above-mentioned problems. Utility Model Content

[0005] The utility model overcomes the shortcomings of the above-mentioned technology and provides a PCB drilling positioning fixture.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A PCB drilling positioning fixture comprises a workbench, a base plate is stacked on the workbench, a processing cover plate is arranged above the base plate, the processing cover plate is used to press the PCB onto the upper end surface of the base plate, the base plate is used to separate the workbench and the PCB, at least two PIN slots are arranged on the top of the workbench, the PIN slots are used to clamp positioning pins, the top of the positioning pins are used to pass through the base plate, the PCB, and the processing cover plate in sequence, and the workbench realizes PCB positioning through at least two positioning pins.

[0008] Preferably, the PCB is rectangular, the first positioning hole is arranged close to the side of the PCB, the workbench is provided with a PIN slot group with the same number as the first positioning holes of the PCB, and the PIN slot group is composed of a plurality of PIN slot matrices; the first positioning holes of the PCB are respectively connected to one of the PIN slots of different PIN slot groups through positioning pins.

[0009] Preferably, the four corners of the PCB are each provided with a first positioning hole, and the workbench is provided with four PIN slot groups.

[0010] Preferably, in the same PIN slot group, the intervals between adjacent PIN slots are equal.

[0011] Preferably, a plane without a PIN slot is provided between the PIN slot groups.

[0012] Preferably, the positioning pin includes a column, a pin head located at the bottom end of the column, the width of the pin head is greater than the width of the column, the pin head is used to engage with the PIN slot, the bottom plate is provided with a second positioning hole for the column to pass through, and the processing cover plate is provided with a third positioning hole for the column to pass through. The width of the second positioning hole is smaller than the width of the pin head.

[0013] The utility model performs the following positioning operations on PCBs of different models: first, according to the size of the PCB and the position of the first positioning hole set on the PCB, a PIN slot on the workbench, a bottom plate that matches the size of the PCB, and a processing cover plate are selected. Then, a positioning pin is inserted into the PIN slot, and the column passes through the second positioning hole, the first positioning hole, and the third positioning hole in sequence, so that the bottom plate, the PCB, and the processing cover plate are fixed on the workbench in sequence.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model connects the workbench, base plate, PCB and processing cover plate by means of the positioning pin and the PIN slot, and the PCB is positioned in the horizontal direction, which is simple to operate and has high drilling positioning efficiency. The PIN slot and the positioning pin can be repeatedly used for positioning, which reduces the cost of drilling positioning.

[0016] 2. The workbench is provided with a PIN slot group with the same number of first positioning holes of the PCB. The PIN slot group is composed of a plurality of PIN slot group matrices. PCBs of different types can select PIN slots at different positions on the workbench according to their sizes and the set positions of the first positioning holes, and then insert positioning pins into the PIN slots to position the PCB, so that the workbench can position PCBs of different types, which is highly practical.

[0017] 3. The bottom plate is stacked on the workbench to prevent damage to the PCB processing drilling workbench. The width of the second positioning hole is smaller than the width of the pin head. The bottom plate is stacked on the workbench to prevent the pin head from escaping from the PIN slot, further strengthening the connection between the PIN slot and the positioning pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the workbench of the utility model;

[0019] Figure 2 This is a top view of a PCB drilling positioning fixture of the utility model;

[0020] Figure 3 yes Figure 2 The cross-sectional view of the AA surface;

[0021] Figure 4 This is a top view of the utility model after replacing different types of PCBs;

[0022] The implementation, functional features and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:

[0024] Reference Figure 1-4 , an embodiment of a PCB drilling positioning fixture of the utility model is proposed:

[0025] A PCB drilling positioning fixture comprises a workbench 1, on which a base plate 2, a PCB 3, and a processing cover plate 4 are stacked in sequence from bottom to top. The length and width of the base plate 2 are respectively equal to the length and width of the PCB 3. The PCB 3 is evenly provided with at least two first positioning holes 31, and the top of the workbench 1 is provided with a PIN slot 11 corresponding to the first positioning hole 31, and the PIN slot 11 is clamped with a positioning pin 5, and the top of the positioning pin 5 passes through the base plate 2, the first positioning hole 31, and the processing cover plate 4 in sequence, so that the workbench 1, the base plate 2, the PCB 3, and the processing cover plate 4 are connected, and the PCB 3 is positioned in the horizontal direction, which is simple to operate and has high drilling positioning efficiency. Moreover, the PIN slot 11 and the positioning pin 5 can be repeatedly used for positioning, thereby reducing the cost of drilling positioning of the workbench 1.

[0026] like Figure 3As shown, the positioning pin 5 includes a column 51, a pin head 52 located at the bottom end of the column 51, the width of the pin head 52 is greater than the width of the column 51, and the pin head 52 is used to engage with the PIN slot 11. The bottom plate 2 is provided with a second positioning hole 21 for the column 51 to pass through, and the processing cover plate 4 is provided with a third positioning hole 41 for the column 51 to pass through. The width of the second positioning hole 21 is smaller than the width of the pin head 52. In the prior art, a die hole is provided on the processing cover plate 4, and a drilling machine aligns the die hole and drills through the PCB 3, so that the PCB 3 can form a drill hole corresponding to the die hole. Usually, when the drilling machine drills a hole in the PCB 3, the drilling machine has a presser foot to press the processing cover plate 4 downward, so that the bottom plate 2, the PCB 3, and the processing cover plate 4 are fixed on the workbench 1. The bottom plate 2 is stacked on the workbench 1, which not only protects the workbench 1 and prevents the workbench 1 from being damaged during the drilling of the PCB 3, but also prevents the pin head 52 from being separated from the PIN slot 11, further strengthening the connection between the PIN slot 11 and the positioning pin 5.

[0027] The existing PCB 3 is usually rectangular, and the first positioning holes 31 are arranged near the side of the PCB 3. The workbench 1 is provided with a PIN slot group 12 having the same number as the first positioning holes 31 of the PCB 3, and the PIN slot group 12 is composed of a plurality of PIN slots 11 arranged in a matrix.

[0028] The positioning operation of the utility model for different types of PCB 3 is as follows: first, according to the size of PCB 3 and the position of the first positioning hole 31 set for PCB 3, the PIN slot 11 on the workbench 1, the bottom plate 2 adapted to the size of PCB 3, and the processing cover plate 4 are selected. Then, the positioning pin 5 is inserted into the PIN slot 11, and the cylinder 51 passes through the second positioning hole 21, the first positioning hole 31, and the third positioning hole 41 in sequence, so that the bottom plate 2, PCB 3, and the processing cover plate 4 are fixed on the workbench 1 in sequence. Figure 2 and Figure 4 As shown, if a different type of PCB 3 is to be replaced, the base plate 2, PCB 3, and processing cover plate 4 originally inserted into the positioning pin 5 are removed, and then the positioning pin 5 is removed from the PIN slot 11. Repeating the above PCB 3 positioning operation can position another type of PCB 3, which is highly practical.

[0029] In the prior art, the method of planting pins on bakelite is to set a first positioning hole on the bakelite, set a second positioning hole on the PCB, align the first positioning hole with the second positioning hole, and then plant the pins. When a different type of PCB needs to be replaced, the bakelite needs to be re-drilled on site. However, the utility model presets a PIN slot group 12 on the workbench 1, and the PIN slot group 12 is composed of a plurality of PIN slot groups 12 arranged in a matrix, which can adapt to different types of PCBs 3. Moreover, when the drilling positioning jig replaces different types of PCBs 3, the workbench 1 does not need to drill holes for positioning, and the PIN slot 11 can be reused for positioning, saving the time spent on drilling and positioning.

[0030] like Figure 1 As shown, the four corners of the PCB 3 are provided with first positioning holes 31, the workbench 1 is provided with four PIN slot groups 12, each PIN slot group 12 corresponds to a first positioning hole 31, and the first positioning hole 31 is connected to a PIN slot 11 in the PIN slot group 12 through a positioning pin 5. The four corners of the PCB 3 are positioned with the workbench 1, which can prevent the PCB 3 from warping.

[0031] Specifically, the positioning pin 5 can be inserted into the PIN slot 11 manually or by a pin insertion machine, and in the same PIN slot group 12, the spacing between adjacent PIN slots 11 is equal, which is convenient for setting the pin insertion machine for pin insertion. The spacing between adjacent PIN slots 11 is set according to the position difference of the first positioning holes 31 between different models of PCBs 3.

[0032] Considering the existing PCB 3 models, the length and width of the PCB 3 are not particularly small, so the entire workbench 1 is not provided with a PIN slot 11 in the utility model, and a plane without a PIN slot 11 is provided between the PIN slot groups 12, thereby reducing the number of PIN slots 11 set on the workbench 1, thereby reducing the cost of providing the PIN slots 11.

[0033] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A PCB drilling positioning fixture, characterized in that: The invention comprises a workbench (1), wherein a base plate (2) is stacked on the workbench (1), a processing cover plate (4) is arranged above the base plate (2), the processing cover plate (4) is used to press a PCB (3) onto the upper end surface of the base plate (2), the base plate (2) is used to separate the workbench (1) and the PCB (3), at least two PIN grooves (11) are arranged on the top of the workbench (1), the PIN grooves (11) are used to clamp a positioning pin (5), the top of the positioning pin (5) is used to pass through the base plate (2), the PCB (3) and the processing cover plate (4) in sequence, and the workbench (1) realizes the positioning of the PCB (3) through the at least two positioning pins (5).

2. A PCB drilling positioning fixture according to claim 1, characterized in that: The PCB (3) is rectangular, and is provided with a first positioning hole (31) for a positioning pin (5) to pass through, the first positioning hole (31) being arranged close to a side edge of the PCB (3), the workbench (1) being provided with a PIN slot group (12) having the same number as the first positioning holes (31) of the PCB (3), the PIN slot group (12) being formed by a plurality of PIN slots (11) arranged in a matrix; the first positioning holes (31) of the PCB (3) are respectively connected to one of the PIN slots (11) of different PIN slot groups (12) through positioning pins (5).

3. A PCB drilling positioning fixture according to claim 2, characterized in that: The four corners of the PCB (3) are each provided with a first positioning hole (31), and the workbench (1) is provided with four PIN slot groups (12).

4. A PCB drilling positioning fixture according to claim 2 or 3, characterized in that: In the same PIN slot group (12), the intervals between adjacent PIN slots (11) are equal.

5. A PCB drilling positioning fixture according to claim 2 or 3, characterized in that: A plane without a PIN slot (11) is provided between the PIN slot groups (12).

6. The PCB drilling positioning fixture according to claim 1, characterized in that: The positioning pin (5) comprises a column (51) and a pin head (52) located at the bottom end of the column (51); the width of the pin head (52) is greater than the width of the column (51); the pin head (52) is used to engage with the PIN slot (11); the bottom plate (2) is provided with a second positioning hole (21) for the column (51) to pass through; the processing cover plate (4) is provided with a third positioning hole (41) for the column (51) to pass through; the width of the second positioning hole (21) is less than the width of the pin head (52).

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