Jig structure for double-sided production

Abstract

The invention relates to a double-sided production jig structure, which comprises a jig provided with a positioning groove and used for placing a PCB (Printed Circuit Board), a through hole is formed in the jig, the jig with the PCB can be uniformly heated in a reflow soldering furnace, magnetic rings A are arranged at two ends of the jig and used for attracting a magnetic ring B to further fix the PCB, and positioning holes are formed in two ends of the magnetic rings A and used for being matched with positioning columns of fixing pieces; the two ends of the fixing part are provided with magnetic rings B, the fixing part is used for attracting the magnetic rings A so as to fix the PCB on the jig, the two ends of each magnetic ring B are provided with positioning columns, the positioning columns are used for being matched with positioning holes of the jig so that the fixing part can fix the PCB on the jig, and the fixing part is provided with an elastic part which fixes the PCB on the jig through elasticity. According to the invention, the double-sided jig is adopted to carry out double-sided production simultaneously in the SMT manufacturing process, the working time can be shortened, the jig can be used for placing 3 * 5 15 continuous PCBs at one time, the production efficiency is effectively improved, and the yield of the PCBs can be improved when the jig is adopted to pass through a furnace.

Description

[Technical field]

[0001] The invention relates to the technical field of jig structures, in particular to a jig structure for double-sided production. [Background technology]

[0002] SMT (Surface Mount Technology) is an electronic circuit production technology that uses professional automatic assembly equipment such as solder paste printers, placement machines, and reflow ovens to directly attach and solder surface-mount components (including resistors, capacitors, inductors, etc.) to the surface of circuit boards. It is currently the most popular technology and process in the electronic assembly industry.

[0003] When producing PCB boards with specifications of S410G3 POGO, the following is currently used: Figure 1 The jig structure shown is used for the production of PCB boards. When a single PCB board is placed on the jig for production, solder paste printing, patch mounting, and reflow soldering are first performed on the TOP side (the front side of the PCB board, which generally has large chips, BGA, etc.), and then solder paste printing, patch mounting, and reflow soldering are performed on the BOT side (the back side of the PCB board, which generally has only resistors, capacitors, etc.). This jig supports the PCB board to prevent deformation of the PCB board.

[0004] However, when this fixture structure is used to perform reflow soldering (melting the solder paste to firmly bond the surface-mounted components to the PCB board) from the TOP surface to the BOT surface of the PCB board, it is easy to cause the solder paste on the TOP surface to melt again, causing the components that have been assembled on the TOP surface to fall off, that is, there will be a phenomenon of empty soldering or floating, resulting in a high rate of defective products. In addition, this fixture can only produce one side of the PCB board at a time, which consumes manpower and working time.

[0005] In view of this, it is necessary to provide a double-sided production fixture structure to solve the above problems. [Summary of the invention]

[0006] The technical problem to be solved by the present invention is that the fixture structure used for the S410G3 POGO PCB board in the SMT production process is likely to cause the solder paste on the TOP surface to melt again when the TOP surface of the PCB board is changed to the BOT surface for reflow soldering, causing the components assembled on the TOP surface to fall off, that is, empty soldering or floating phenomenon will occur, resulting in a high defective product rate, and this fixture can only produce one side of the PCB board at a time, consuming manpower and working time. Therefore, the present invention provides a fixture structure for double-sided production to solve the above problems.

[0007] The solution of the present invention to solve the technical problem is: a double-sided production fixture structure, comprising:

[0008] A fixture, wherein a positioning groove is provided in the fixture, wherein the positioning groove is used to place a PCB board, wherein a through hole is provided in the positioning groove, wherein the through hole can make the fixture with the PCB board be heated evenly in the reflow oven, so that the solder paste is fully melted, wherein magnetic rings A are provided at both ends of the fixture, wherein the magnetic ring A can be attracted to the magnetic ring B, and is used to fix the PCB board, wherein positioning holes are provided at both ends of the magnetic ring A, wherein the positioning holes are used to cooperate with the positioning posts of the fixing part;

[0009] A fixing piece, wherein magnetic circles B are respectively provided at both ends of the fixing piece, and the magnetic circle B is attracted to the magnetic circle A and is used to fix the PCB board in the corresponding positioning groove of the fixture, and positioning columns are provided at both ends of the magnetic circle B, and the positioning columns are used to cooperate in the positioning holes in the fixture and are used to position the fixing piece so that the fixing piece fixes the PCB board in the corresponding position in the fixture, and the fixing piece is provided with an elastic piece on the side in contact with the PCB board, and the elastic piece fixes the PCB board on the fixture through elasticity.

[0010] Preferably, the jig can be set to 3*5 positioning grooves for simultaneously producing 15 PCB boards, or can be set to positioning grooves of different specifications such as 2*3, 2*4, 3*3, etc., for simultaneously producing different numbers of PCB boards according to production needs. When positioning grooves of other specifications are set, a milling cutter is required to separate the integrated 15 connected boards into the required connected boards according to their specifications.

[0011] Preferably, three groups of magnetic circles A and magnetic circles B are provided on the fixture, and are respectively arranged on the corresponding PCB boards in each column.

[0012] Preferably, the elastic member may be a spring.

[0013] Preferably, the jig and the fixing piece are made of aluminum alloy.

[0014] Preferably, when the fixture and the PCB board are placed in a reflow oven for high-temperature melting of solder paste, the melting temperature is 217°C, and the reflow oven can be adjusted to above 220°C for 40 to 110 seconds, wherein the maximum temperature can reach 250°C.

[0015] The beneficial effects of the present invention are that the present invention adopts a double-sided fixture to simultaneously perform double-sided production in the SMT process, that is, one line change is reduced, the working time can be shortened, and the fixture can place 3*5 15 connected PCB boards at one time, which effectively improves the production efficiency, and when the fixture is used to pass the furnace, the TOP surface and the BOT surface of the PCB board can be reflow soldered at the same time, avoiding the secondary melting of the solder paste on the TOP surface when changing the BOT surface, causing the components assembled on the TOP surface to fall off, and the positioning grooves on the fixture can fix the components on the PCB board, which can effectively improve the yield of the PCB board.

Brief Description of the Drawings

[0016] Figure 1 It is a structural schematic diagram of a known fixture.

[0017] Figure 2 It is a structural schematic diagram of a double-sided production jig structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the other side of a double-sided production jig structure of the present invention.

[0019] Figure 4 It is a structural schematic diagram of the fixing member in the present invention.

[0020] Figure 5 It is a structural schematic diagram of the PCB board fixed on the fixture through the fixing parts in the present invention. [Specific implementation method]

[0021] To further illustrate the technical means and effects adopted by the present invention, the following is a detailed description in conjunction with the embodiments of the present invention and the accompanying drawings.

[0022] The present invention provides a double-sided production jig structure, comprising:

[0023] A fixture 101, wherein a positioning groove 102 is provided in the fixture 101, wherein the positioning groove 102 is used to place a PCB board 120, wherein a through hole 105 is provided in the positioning groove 102, wherein the through hole 105 can make the fixture 101 with the PCB board 120 be heated evenly in a reflow oven, so that the solder paste is fully melted, wherein magnetic rings A103 are provided at both ends of the fixture 101, wherein the magnetic ring A103 can be attracted to the magnetic ring B111, and is used to fix the PCB board 120, wherein positioning holes 104 are provided at both ends of the magnetic ring A103, wherein the positioning holes 104 are used to cooperate with the positioning posts 113 of the fixing member 110;

[0024] A fixing member 110, wherein magnetic circles B111 are respectively provided at both ends of the fixing member 110, wherein the magnetic circle B111 attracts the magnetic circle A103 and is used to fix the PCB board 120 in the corresponding positioning groove 102 of the fixture 101, and positioning columns 113 are provided at both ends of the magnetic circle B111, wherein the positioning columns 113 are used to cooperate in the positioning holes 104 in the fixture 101 and are used to position the fixing member 110 so that the fixing member 110 fixes the PCB board 120 in the corresponding position in the fixture 101, and an elastic member 112 is provided on the side of the fixing member 110 in contact with the PCB board 120, wherein the elastic member 112 can fix and press the PCB board 120 on the fixture 101 through elasticity to prevent the PCB board 120 from deforming.

[0025] Among them, the fixture 101 can be set to 3*5 positioning grooves 102 for simultaneously producing 15 PCB boards 120, and can also be set to positioning grooves 102 of different specifications such as 2*3, 2*4, 3*3, etc., for simultaneously producing different numbers of PCB boards 120 according to production needs. When setting positioning grooves 102 of other specifications, a milling cutter is required to divide the integrated 15 connected boards into the required connected boards according to their specifications.

[0026] The magnetic rings A103 and B111 are provided in three groups on the fixture 101 , and are respectively provided on the corresponding PCB board 120 in each column.

[0027] The elastic member 112 may be a spring.

[0028] Wherein, the fixture 101 and the fixing member 110 are made of aluminum alloy.

[0029] When the fixture 101 and the PCB board 120 are placed in a reflow oven to melt the solder paste at high temperature, the melting temperature is 217°C, and the reflow oven can be adjusted to above 220°C for 40 to 110 seconds, with the highest temperature reaching 250°C.

[0030] The working process of the present invention is as follows: solder paste is printed on the TOP surface of the 15-piece PCB board 120, and then solder paste is printed on its BOT surface, and then the TOP surface and the BOT surface are patched. After the patching is completed, the PCB board 120 is placed in the positioning groove 102 in the fixture 101, and three fixing members 110 are taken, so that the magnetic circles B111 of the three fixing members 110 are respectively attracted to the magnetic circles A103 in each column. At this time, the positioning columns 113 of the fixing members 110 are also matched with the positioning holes 104 in the fixture 101. At the same time, under the action of the elastic member 112, the PCB board 120 is fixed and pressed on the fixture 101. Finally, the fixture 101 with the PCB board 120 is placed in a reflow soldering furnace, so that the TOP surface and the BOT surface of the PCB board 120 are reflow soldered at the same time.

[0031] The beneficial effects of the present invention are that the present invention adopts a double-sided fixture 101 to simultaneously perform double-sided production in the SMT process, that is, one line change is reduced, the working time can be shortened, and the fixture 101 can place 3*5 15 connected PCB boards 120 at one time, which effectively improves the production efficiency, and when the fixture 101 is used to pass the furnace, the TOP surface and the BOT surface of the PCB board 120 can be reflow soldered at the same time, avoiding the secondary melting of the solder paste on the TOP surface when changing the BOT surface, causing the components assembled on the TOP surface to fall off, and the positioning grooves 102 on the fixture 101 can fix the components on the PCB board 120, which can effectively improve the yield of the PCB board 120.

[0032] It should be pointed out that the present invention is not limited to the above-mentioned implementation modes, and any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments by any technician familiar with the profession based on the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A jig structure for double-sided production, characterized in that: include: A fixture, wherein a positioning groove is provided in the fixture, wherein the positioning groove is used to place a PCB board, wherein a through hole is provided in the positioning groove, wherein the through hole can make the fixture with the PCB board be heated evenly in the reflow oven, so that the solder paste is fully melted, wherein magnetic rings A are provided at both ends of the fixture, wherein the magnetic ring A can be attracted to the magnetic ring B, and is used to fix the PCB board, wherein positioning holes are provided at both ends of the magnetic ring A, wherein the positioning holes are used to cooperate with the positioning posts of the fixing part; A fixing piece, wherein magnetic circles B are respectively provided at both ends of the fixing piece, and the magnetic circle B is attracted to the magnetic circle A and is used to fix the PCB board in the corresponding positioning groove of the fixture, and positioning columns are provided at both ends of the magnetic circle B, and the positioning columns are used to cooperate in the positioning holes in the fixture and are used to position the fixing piece so that the fixing piece fixes the PCB board in the corresponding position in the fixture, and the fixing piece is provided with an elastic piece on the side in contact with the PCB board, and the elastic piece fixes the PCB board on the fixture through elasticity.

2. A double-sided production jig structure as claimed in claim 1, characterized in that: The jig can be set to 3*5 positioning grooves for producing 15 PCB boards at the same time, or can be set to positioning grooves of different specifications such as 2*3, 2*4, 3*3, etc., for producing different numbers of PCB boards at the same time according to production needs. When positioning grooves of other specifications are set, a milling cutter is required to divide the integrated 15-connected boards into the required connected boards according to their specifications.

3. A double-sided production jig structure as claimed in claim 1, characterized in that: The magnetic rings A and B are provided in three groups on the fixture, and are respectively provided on the corresponding PCB boards in each column.

4. A double-sided production jig structure as claimed in claim 1, characterized in that: The elastic member may be a spring.

5. A double-sided production jig structure as claimed in claim 1, characterized in that: The jig and the fixing piece are made of aluminum alloy.

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