Solder paste printing jig for SMT (Surface Mount Technology)

Abstract

The utility model relates to the technical field of equipment for SMT (surface mount technology), in particular to a solder paste printing jig for SMT, which comprises a support part, a PCB (printed circuit board) support part, a steel mesh and a centering and aligning mechanism, the centering and aligning mechanism comprises a preset plate, a vertical plate, a driving part, a fixing block, two connecting blocks and two centering parts, the preset plate is arranged on a printing platform, the vertical plate is fixedly connected with the preset plate, and the driving part is fixedly connected with the fixing block. The preset plate is provided with a sliding groove, the two centering pieces are both in sliding connection with the sliding groove, the driving piece is fixedly connected with the preset plate and also located above the preset plate, the output end of the driving piece is fixedly connected with the fixing block, one ends of the two connecting blocks are both hinged to the fixing block, and the other ends of the two connecting blocks are hinged to the fixing block. The other ends of the two connecting blocks are hinged to the corresponding centering pieces respectively, the support part is arranged on the preset plate and located between the two centering pieces, and the two centering pieces make contact with the support part, so that the centering position of the jig can be guaranteed in this way, and follow-up machining is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of SMT equipment, in particular to a solder paste printing jig for SMT. Background Art

[0002] SMT (surface mount technology) is the most popular technology and process in the electronic assembly industry. With the rapid development of electronic technology, the application of SMT is becoming more and more extensive. Solder paste came into being with SMT. It is mainly used for welding electronic components such as resistors, capacitors, ICs, etc. on the surface of PCBs in the SMT industry. Solder paste has a certain viscosity at room temperature and can initially stick electronic components to a predetermined position. At the welding temperature, as the solvent and some additives evaporate, the components to be welded are welded to the printed circuit pads to form a permanent connection. The existing SMT solder paste printing jig can only produce PCBs with fewer parts and less density.

[0003] In response to the above problems, the prior art patent publication number CN216531991U discloses a solder paste printing jig, which is accurately placed on the printing platform through a positioning structure, and the jig is fixed on the printing platform by magnetic attraction. The PCB board with dense parts and easy to deform is placed on the jig, and the empty support convex strips of the PCB support part are accurately supported at the empty position on the bottom surface of the PCB board. The printing machine platform drives the special jig to rise, so that the PCB board is fitted with the steel mesh, and printing begins. After printing is completed, the platform is lowered to convey the PCB and wait for the next PCB. This can solve the technical problem that the existing SMT solder paste printing jig can only produce PCBs with fewer parts and less density.

[0004] However, in the above method, the center position of the jig cannot be guaranteed when the jig is placed on the printing platform. If there is a deviation, subsequent processing will be affected. Utility Model Content

[0005] The utility model aims to provide a solder paste printing jig for SMT, aiming to solve the technical problem in the prior art that the center position of the jig cannot be guaranteed when the jig is placed on a printing platform, and any deviation will affect subsequent processing.

[0006] To achieve the above-mentioned purpose, the utility model adopts a solder paste printing jig for SMT, including a bracket part, a PCB supporting part, a steel mesh and a centering alignment mechanism, wherein the PCB supporting part is arranged on the bracket part, and the centering alignment mechanism includes a preset plate, a vertical plate, a driving member, a fixed block, two connecting blocks and two centering members, the preset plate is arranged on the printing platform, the vertical plate is fixedly connected to the preset plate and is located above the preset plate, the preset plate is provided with a slide groove, the two centering members are both slidably connected to the slide groove, the driving member is fixedly connected to the preset plate, the driving member is also located above the preset plate, the output end of the driving member is fixedly connected to the fixed block, one end of the two connecting blocks are hinged to the fixed block, and the other ends of the two connecting blocks are respectively hinged to the corresponding centering members, the bracket part is arranged on the preset plate, and is located between the two centering members, and the two centering members are both in contact with the bracket part.

[0007] Wherein, the centering member includes a slider and a clamping plate, the slider is slidably connected to the sliding groove, the clamping plate is fixedly connected to the slider, and the clamping plate is in contact with the bracket part.

[0008] Wherein, the driving member includes a support plate and a motor, the support plate is fixedly connected to the preset plate, and the motor is installed on the support plate.

[0009] Among them, the centering alignment mechanism also includes a hole rod and a sliding rod, the hole rod is arranged in the sliding groove, one end of the hole rod is fixedly connected to one of the sliding blocks, the other end of the hole rod is sleeved with the sliding rod, and the end of the sliding rod away from the hole rod is fixedly connected to the other sliding block.

[0010] Wherein, the centering alignment mechanism also includes a protective plate, which is fixedly connected to the preset plate and is located above the preset plate.

[0011] The utility model discloses a solder paste printing jig for SMT. By setting the centering alignment mechanism, when it is used, the bracket part is placed on the preset board, the driving part is turned on, and the output end of the driving part drives the fixed block to rotate. The fixed block drives one end of the two connecting blocks to rotate on the fixed block, and drives the other ends of the two connecting blocks to rotate on the corresponding centering parts respectively. The two ends of the two connecting blocks drive the two centering parts to slide toward each other in the slide groove while rotating. The two centering parts slide toward each other in the slide groove while centering and aligning the bracket part on the preset board. Then, a PCB board with dense parts and easy to deform is placed on the PCB support part. The empty support convex strips of the PCB support part are accurately supported at the empty position of the bottom surface of the PCB board. The printing machine platform drives the preset board to rise, so that the PCB board is fitted with the steel mesh, and printing starts. After printing is completed, the platform is lowered to transmit the PCB and wait for the next PCB. In this way, the center position of the jig can be guaranteed, and subsequent processing will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model.

[0014] Figure 2 It is a partial structural schematic diagram of the first embodiment of the utility model.

[0015] Figure 3 It is a partial structural schematic diagram of the first embodiment of the utility model.

[0016] Figure 4 The utility model Figure 3 AA line structural cross-section view.

[0017] Figure 5 It is a partial structural schematic diagram of the second embodiment of the utility model.

[0018] 101-bracket part, 102-PCB support part, 103-steel mesh, 104-preset plate, 105-vertical plate, 106-fixed block, 107-connecting block, 108-slider, 109-clamp, 110-support plate, 111-motor, 112-slide groove, 201-hole rod, 202-slide rod, 203-protective plate. DETAILED DESCRIPTION

[0019] First embodiment:

[0020] See also Figure 1 to Figure 4 ,in Figure 1 It is a structural schematic diagram of the first embodiment of the utility model. Figure 2 It is a partial structural schematic diagram of the first embodiment of the utility model. Figure 3 It is a partial structural schematic diagram of the first embodiment of the utility model. Figure 4 The utility model Figure 3 AA line structural cross-section view.

[0021] The utility model provides a solder paste printing jig for SMT: comprising a bracket part 101, a PCB supporting part 102, a steel mesh 103 and a centering alignment mechanism, wherein the centering alignment mechanism comprises a preset plate 104, a vertical plate 105, a driving member, a fixing block 106, two connecting blocks 107 and two centering members, wherein the centering member comprises a slider 108 and a clamping plate 109, and the driving member comprises a support plate 110 and a motor 111. The above-mentioned scheme solves the technical problem in the prior art that the centering position of the jig cannot be guaranteed when the jig is placed on a printing platform, and any deviation will affect subsequent processing.

[0022] According to this specific embodiment, the PCB support part 102 is arranged on the bracket part 101, and the PCB board with dense parts and easy to deform is placed on the PCB support part 102. The empty support convex strips of the PCB support part 102 are accurately supported at the empty positions on the bottom surface of the PCB board.

[0023] The preset plate 104 is arranged on the printing platform, the vertical plate 105 is fixedly connected to the preset plate 104 and is located above the preset plate 104, the preset plate 104 is provided with a slide groove 112, the two centering members are slidably connected to the slide groove 112, the driving member is fixedly connected to the preset plate 104, the driving member is also located above the preset plate 104, the output end of the driving member is fixedly connected to the fixed block 106, one end of the two connecting blocks 107 are hinged to the fixed block 106, and the other ends of the two connecting blocks 107 are respectively hinged to the corresponding centering members, the bracket part 101 is arranged on the preset plate 104 and is located between the two centering members, and the two centering members are in contact with the bracket part 101, by setting the centering alignment mechanism, when it is used, the bracket part 101 is placed on the preset plate 104, the driving member is opened, and the output end of the driving member drives the The fixing block 106 rotates, and the fixing block 106 drives one ends of the two connecting blocks 107 to rotate on the fixing block 106, and drives the other ends of the two connecting blocks 107 to rotate on the corresponding centering pieces respectively. The two ends of the two connecting blocks 107 drive the two centering pieces to slide toward each other in the slide groove 112 while rotating. The two centering pieces slide toward each other in the slide groove 112 while centering and aligning the bracket part 101 on the preset plate 104, and then the PCB board with dense parts and easy to deform is placed on the PCB support part 102, and the empty support convex strips of the PCB support part 102 are accurately supported in the empty position of the bottom surface of the PCB board, and the printing machine platform drives the preset plate 104 to rise, so that the PCB board is fitted with the steel mesh 103, and printing starts. After printing is completed, the platform is lowered to transmit the PCB and wait for the next PCB. In this way, the center position of the fixture can be guaranteed without affecting subsequent processing.

[0024] Secondly, the slider 108 is slidably connected to the slide groove 112, the clamping plate 109 is fixedly connected to the slider 108, and the clamping plate 109 is in contact with the bracket part 101. By setting the slider 108 and the clamping plate 109, when the connecting block 107 rotates, the connecting block 107 drives the slider 108 to slide in the slide groove 112, and the slider 108 drives the clamping plate 109 to move.

[0025] Meanwhile, the support plate 110 is fixedly connected to the preset plate 104 , and the motor 111 is mounted on the support plate 110 . By arranging the support plate 110 and the motor 111 , the motor 111 can be fixed on the preset plate 104 through the support plate 110 .

[0026] When using a solder paste printing jig for SMT of the present embodiment and setting the centering alignment mechanism, the bracket part 101 is placed on the preset plate 104, the driving member is turned on, and the output end of the driving member drives the fixed block 106 to rotate, and the fixed block 106 drives one end of the two connecting blocks 107 to rotate on the fixed block 106, and drives the other ends of the two connecting blocks 107 to rotate on the corresponding centering members respectively, and the two ends of the two connecting blocks 107 drive the two centering members to slide toward each other in the slide groove 112 while rotating, and the two The centering piece slides toward each other in the slide groove 112 and aligns and clamps the bracket part 101 on the preset plate 104 in the center. Then, the PCB board with dense parts and easy to deform is placed on the PCB support part 102. The empty support convex strips of the PCB support part 102 are accurately supported at the empty positions on the bottom surface of the PCB board. The printing machine platform drives the preset plate 104 to rise, so that the PCB board fits the steel mesh 103, and printing begins. After printing is completed, the platform is lowered to convey the PCB and wait for the next PCB. In this way, the center position of the fixture can be guaranteed without affecting subsequent processing.

[0027] Second embodiment:

[0028] Based on the first embodiment, please refer to Figure 5 , Figure 5 It is a partial structural schematic diagram of the second embodiment of the utility model.

[0029] The utility model provides a solder paste printing jig for SMT, which comprises a centering alignment mechanism. The centering alignment mechanism further comprises a hole rod 201, a slide rod 202 and a protection plate 203.

[0030] According to this specific embodiment, the hole rod 201 is arranged in the slide groove 112, one end of the hole rod 201 is fixedly connected to one of the sliders 108, the other end of the hole rod 201 is sleeved with the slide rod 202, and the end of the slide rod 202 away from the hole rod 201 is fixedly connected to the other slider 108. By setting the hole rod 201 and the slide rod 202, when the two sliders 108 slide, the corresponding slider 108 drives the slide rod 202 to slide in the hole rod 201, thereby improving the stability of the slider 108.

[0031] The protection plate 203 is fixedly connected to the preset plate 104 and is located above the preset plate 104 . By providing the protection plate 203 , the motor 111 can be protected.

[0032] By using a solder paste printing jig for SMT according to the present embodiment, by setting the hole rod 201 and the slide rod 202, when the two sliders 108 slide, the corresponding slider 108 drives the slide rod 202 to slide in the hole rod 201, thereby improving the stability of the slider 108, and by setting the protective plate 203, the motor 111 can be protected.

[0033] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A solder paste printing jig for SMT, comprising a bracket part, a PCB support part and a steel mesh, wherein the PCB support part is arranged on the bracket part, characterized in that: Also included is a centering alignment mechanism; The centering alignment mechanism includes a preset plate, a vertical plate, a driving member, a fixed block, two connecting blocks and two centering members. The preset plate is arranged on the printing platform, the vertical plate is fixedly connected to the preset plate and is located above the preset plate, the preset plate is provided with a slide groove, the two centering members are both slidably connected to the slide groove, the driving member is fixedly connected to the preset plate, the driving member is also located above the preset plate, the output end of the driving member is fixedly connected to the fixed block, one end of the two connecting blocks are hinged to the fixed block, and the other ends of the two connecting blocks are respectively hinged to the corresponding centering members, the bracket part is arranged on the preset plate and is located between the two centering members, and the two centering members are both in contact with the bracket part.

2. The SMT solder paste printing jig according to claim 1, characterized in that: The centering member includes a slider and a clamping plate, wherein the slider is slidably connected to the sliding groove, the clamping plate is fixedly connected to the slider, and the clamping plate is in contact with the bracket portion.

3. The SMT solder paste printing jig according to claim 2, characterized in that: The driving member includes a support plate and a motor. The support plate is fixedly connected to the preset plate, and the motor is mounted on the support plate.

4. The SMT solder paste printing jig according to claim 3, characterized in that: The centering alignment mechanism also includes a hole rod and a sliding rod. The hole rod is arranged in the sliding groove. One end of the hole rod is fixedly connected to one of the sliding blocks. The other end of the hole rod is sleeved with the sliding rod. The end of the sliding rod away from the hole rod is fixedly connected to the other sliding block.

5. The SMT solder paste printing jig according to claim 4, characterized in that: The centering alignment mechanism also includes a protective plate, which is fixedly connected to the preset plate and is located above the preset plate.

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