Multi-bridge synchronous sintering tool

Abstract

The utility model discloses a multi-bridge synchronous sintering tool, and belongs to the technical field of multi-bridge sintering. Threaded holes are formed in the top corners of the base, the cover plate is installed above the base through screws, a gap is reserved between the base and the cover plate, an installation groove is formed in the top face of the base, the installation groove is located in the reserved gap, and the installation groove is used for containing a circuit board and is matched with the screws for installing the cover plate to limit the circuit board in the installation groove. A bridge limiting part is installed on the bottom surface of the cover plate, the bridge limiting part is located in the gap, the bridge limiting part is used for limiting a bridge placed on the circuit board, a bridge extrusion part is installed on the cover plate, and the bridge extrusion part is partially located in the gap, operationally reciprocates in the height direction of the gap and attaches and extrudes the bridge limited on the circuit board. According to the utility model, the problems of bridge displacement, poor welding and the like in the traditional sintering process are effectively solved, and the qualified rate and the production efficiency of products are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of multi-bridge sintering, and particularly relates to a multi-bridge synchronous sintering tooling. Background Technique

[0002] Bridge sintering is a technology that measures the resistance change of materials or components during the sintering process through the principle of bridge circuits. In the prior art, there are various forms of bridge sintering, such as single-bridge sintering and multi-bridge sintering. During the multi-bridge sintering process, due to the relatively thin circuit board itself, when multiple bridges are sintered simultaneously, the circuit board will be deformed due to uneven heating. Moreover, after multiple bridges are sintered on the circuit board simultaneously, during the process of shifting the circuit board from the heating table to the heat dissipation block, the bridges will shift, resulting in solder bridge connection during the subsequent pressing process of the bridges, thus causing short circuits in bridge sintering. Even if there is no short circuit, due to the shift of the bridges, there will be a situation where the bridges cannot be placed properly due to being stuck at the edge when installed in the component. Content of the Utility Model

[0003] Purpose of the utility model: To provide a multi-bridge synchronous sintering tooling, which solves the above problems existing in the prior art.

[0004] Technical solution: A multi-bridge synchronous sintering tooling includes a base. Threaded holes are provided at the top corners of the base, and a cover plate is installed above the base through screws. A gap is reserved between the base and the cover plate. An installation groove is provided on the top surface of the base, and the installation groove is located within the reserved gap. The installation groove is used to place the circuit board and, in cooperation with the screws of the cover plate, limit the circuit board in the installation groove. A bridge limiting part is installed on the bottom surface of the cover plate, and the bridge limiting part is located within the gap. The bridge limiting part is used to limit the bridges placed on the circuit board. A bridge pressing part is installed on the cover plate, and a part of the bridge pressing part is located within the gap and can reciprocate along the height direction of the gap to fit and press the bridges limited on the circuit board.

[0005] Preferably, a plurality of assembly grooves are provided at the bottom of the installation groove. The assembly grooves are used to socket fastening screws of the M2*5 model. With the cooperation of the fastening screws and the assembly grooves, the circuit board is limited and fixed in the installation groove.

[0006] Preferably, the bridge limiting part includes a plurality of first limiting blocks, second limiting blocks, third limiting blocks, and fourth limiting blocks. The first limiting blocks, second limiting blocks, third limiting blocks, and fourth limiting blocks are all installed on the end face of the cover plate close to the installation groove. With the cooperation of the first limiting blocks, second limiting blocks, third limiting blocks, and fourth limiting blocks, the displacement distance of the bridges on the circuit board is fixed within a preset range.

[0007] Preferably, the bridge extrusion part includes first positive and negative threaded nails equal in number to the bridges. The first positive and negative threaded nails are installed on the cover plate through positive and negative threaded holes provided on the cover plate. The moving end of the first positive and negative threaded nail is connected to a pressing block, and the pressing block is threadedly connected to the first positive and negative threaded nail through the first positive and negative threaded hole.

[0008] Preferably, the first positive and negative threaded nails are M3*8 positive and negative threaded nails, the screws are second positive and negative threaded nails, and the second positive and negative threaded nails are M3*5 positive and negative threaded nails.

[0009] Preferably, the base, the cover plate, the bridge limiting part, and the bridge extrusion part are all made of graphite material.

[0010] Beneficial effects: The utility model relates to a multi-bridge synchronous sintering tooling. The circuit board is placed in the installation groove of the base, and the circuit board is fixed in the installation groove through the mutual cooperation of the assembly groove and the fastening screws arranged at the bottom of the installation groove, avoiding the deformation of the circuit board during the sintering process;

[0011] Secondly, the multiple bridges to be sintered are limited by the bridge limiting part installed on the cover plate, so that the moving space of the bridges is within the allowable range, and the bridge extrusion component is used to extrude the bridges, ensuring that the bridges will not move with the melted solder or other external forces during the sintering process, effectively solving problems such as bridge displacement and poor welding in the traditional sintering process, and improving the product qualification rate and production efficiency. Description of the Drawings

[0012] Figure 1 is the overall structure explosion diagram of the utility model;

[0013] Figure 2 is the schematic diagram of the cover plate structure of the utility model.

[0014] Figures 1 to 2 The reference numerals in are: 100, base; 200, cover plate; 300, installation groove; 400, bridge limiting part; 500, bridge extrusion part; 600, assembly groove;

[0015] 401, first limiting block; 402, second limiting block; 403, third limiting block; 404, fourth limiting block;

[0016] 501, first positive and negative threaded nail; 502, pressing block. Detailed Embodiment

[0017] As Figures 1 to 2As shown in the figure, the utility model provides a technical solution: a multi-bridge synchronous sintering tooling, including a base 100, a cover plate 200, a bridge limiting part 400 and a bridge pressing part 500. The base 100, the cover plate 200, the bridge limiting part 400 and the bridge pressing part 500 are all made of graphite material and are used in reflow soldering. The temperature of reflow soldering can be reduced, solving the problem of too high reflow temperature after adding the tooling. Threaded holes are opened at the top corners of the base 100. The cover plate 200 is installed above the base 100 by screws. In order to enable the cover plate 200 and the base 100 to be stably installed, the threaded holes opened at the top corners of the base 100 are positive and negative threaded holes. The screws are second positive and negative threaded screws. The second positive and negative threaded screws are M3*5 type positive and negative threaded screws. The second positive and negative threaded screw box and the positive and negative threaded holes at the top corners of the base 100 cooperate to install the cover plate 200 on the base 100. A gap is reserved between the base 100 and the cover plate 200. An installation groove 300 is opened on the top surface of the base 100. The installation groove 300 is located in the reserved gap. The installation groove 300 is used to place the circuit board and cooperate with the screws for installing the cover plate 200 to limit the circuit board in the installation groove 300. The bridge limiting part 400 is installed on the bottom surface of the cover plate 200. The bridge limiting part 400 is located in the gap. After the bridge is placed on the circuit board, the placement position of the bridge is limited by the bridge limiting part 400. The bridge pressing part 500 is installed on the cover plate 200. The bridge pressing part 500 is partially located in the gap and the operating part reciprocates along the height direction of the gap to fit and press the bridge limited on the circuit board, ensuring that during the sintering process, after the solder melts, the bridge will not move with the solder or other external forces, effectively solving problems such as bridge displacement and poor soldering in the traditional sintering process, and improving the product qualification rate and production efficiency.

[0018] In a further embodiment, a plurality of assembly grooves 600 are opened at the bottom of the installation groove 300. The assembly grooves 600 are used to socket M2*5 type fastening screws. With the cooperation of the fastening screws and the assembly grooves 600, the circuit board is limited and fixed in the installation groove 300, further limiting the position of the circuit board in the installation groove 300 and avoiding the situation that the circuit board is deformed during the sintering process.

[0019] In a further embodiment, the bridge limiting portion 400 includes a plurality of first limiting blocks 401, second limiting blocks 402, third limiting blocks 403 and fourth limiting blocks 404. The first limiting blocks 401, second limiting blocks 402, third limiting blocks 403 and fourth limiting blocks 404 are all installed on the end face of the cover plate 200 close to the installation groove 300. Under the cooperation of the first limiting blocks 401, second limiting blocks 402, third limiting blocks 403 and fourth limiting blocks 404, the displacement distance of the bridge on the circuit board is fixed within a preset range. The bridge pressing portion 500 includes first positive and negative threaded nails 501 having the same number as the bridges. The first positive and negative threaded nails 501 are installed on the cover plate 200 through positive and negative threaded holes provided on the cover plate 200. The moving end of the first positive and negative threaded nail 501 is connected to a pressing block 502. The pressing block 502 is threadedly connected to the first positive and negative threaded nail 501 through the first positive and negative threaded hole. The first positive and negative threaded nail 501 is a positive and negative threaded nail of model M3*8. By rotating the first positive and negative threaded nail 501, the position of the pressing block 502 in the gap is adjusted, and the force of the pressing block 502 on the bridge is controlled to complete the sintering of the bridge.

[0020] Through the above technical solution, the present utility model can achieve the following working process:

[0021] When sintering a plurality of bridges, according to the positions on the circuit board where the bridges need to be installed, solder paste is dot-coated on the full-welding points of the circuit board. The circuit board with the dot-coated solder paste is installed in the installation groove 300 of the base 100 according to the position of the assembly groove 600. As Figure 1 shown, the bridge to be installed is placed on the circuit board with the dot-coated solder paste. The first limiting block 401, second limiting block 402, third limiting block 403 and fourth limiting block 404 are installed on the cover plate 200 through threaded nails. The cover plate 200 with the installed bridge limiting portion 400 is pressed down. During the pressing process, observe the positions of the first limiting block 401, second limiting block 402, third limiting block 403 and fourth limiting block 404. During the pressing down of the first limiting block 401, second limiting block 402, third limiting block 403 and fourth limiting block 404, they should not touch the bridge.

[0022] When the positions of the cover plate 200 and the base 100 are fixed, the cover plate 200 and the base 100 are fixedly limited by the second positive and negative threaded nails. After the cover plate 200 is fixed, the first positive and negative threaded nail 501 is screwed, so that the pressing block 502 moves downward. When the first positive and negative threaded nail 501 is tightened, the pressing block 502 just presses directly above the bridge.

[0023] Place the multi-bridge synchronous sintering tooling on the heating table for heating. After the solder melts, move the multi-bridge synchronous sintering tooling from the heating table to the heat sink. Wait for the heat to dissipate, loosen the second positive and negative threaded nails pressing the four corners, remove the pressure cover, loosen the threaded nails on the circuit board in the installation groove 300 of the base 100, and take out the circuit board to obtain the circuit board for multi-bridge synchronous installation.

[0024] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the protection scope of the present invention.

Claims

1. A multi-bridge synchronous sintering tool, characterized in that: The invention comprises a base (100), wherein the top corners of the base (100) are provided with threaded holes, a cover plate (200) is installed on the top of the base (100) by means of screws, a gap is reserved between the base (100) and the cover plate (200), a mounting groove (300) is provided on the top surface of the base (100), the mounting groove (300) is located in the reserved gap, the mounting groove (300) is used to place a circuit board, and cooperates with the screws for installing the cover plate (200) to install the circuit board. The circuit board in the slot (300) is limited in position, the bottom surface of the cover plate (200) is provided with a bridge limiting portion (400), the bridge limiting portion (400) is located in the gap, the bridge limiting portion (400) is used to limit the bridge placed on the circuit board, and the cover plate (200) is provided with a bridge extrusion portion (500), the bridge extrusion portion (500) is partially located in the gap and is operable to reciprocate along the gap height direction to fit and extrude the bridge limited on the circuit board.

2. The multi-bridge synchronous sintering tooling according to claim 1, characterized in that: A plurality of assembly grooves (600) are provided at the bottom of the installation groove (300), and the assembly grooves (600) are used to receive M2*5 type fastening screws. With the cooperation of the fastening screws and the assembly grooves (600), the circuit board is fixed in position within the installation groove (300).

3. The multi-bridge synchronous sintering tooling according to claim 1, characterized in that: The bridge limiting portion (400) comprises a plurality of first limiting blocks (401), a second limiting block (402), a third limiting block (403) and a fourth limiting block (404); the first limiting blocks (401), the second limiting blocks (402), the third limiting blocks (403) and the fourth limiting blocks (404) are all mounted on an end surface of the cover plate (200) close to the mounting groove (300); the first limiting blocks (401), the second limiting blocks (402), the third limiting blocks (403) and the fourth limiting blocks (404) cooperate to fix the displacement distance of the bridge on the circuit board within a preset range.

4. The multi-bridge synchronous sintering tooling according to claim 1, characterized in that: The bridge extrusion portion (500) comprises first forward and reverse threaded screws (501) of the same number as the bridges; the first forward and reverse threaded screws (501) are mounted on the cover plate (200) via forward and reverse threaded holes provided on the cover plate (200); a movable end of the first forward and reverse threaded screws (501) is connected to a pressing block (502); and the pressing block (502) is threadedly connected to the first forward and reverse threaded screws (501) via the first forward and reverse threaded holes.

5. The multi-bridge synchronous sintering tooling according to claim 4, characterized in that: The first forward and reverse threaded nail (501) is an M3*8 forward and reverse threaded nail, and the screw is a second forward and reverse threaded nail, and the second forward and reverse threaded nail is an M3*5 forward and reverse threaded nail.

6. The multi-bridge synchronous sintering tooling according to claim 1, characterized in that: The base (100), the cover plate (200), the bridge limiting portion (400) and the bridge extrusion portion (500) are all made of graphite material.

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