Clamp for SMT (Surface Mount Technology)

Abstract

The utility model discloses a fixture for SMT (Surface Mount Technology), comprising a workbench, the upper surface of the workbench is fixedly connected with symmetrically distributed mounting blocks, the inner wall of each mounting block is provided with a rotating sleeve through a bearing, the outer surface of each rotating sleeve is fixedly sleeved with an annular fixed block, the inner wall of each rotating sleeve is movably sleeved with a telescopic rod, and the telescopic rod is fixedly connected with the rotating sleeve. And one end of the telescopic rod is fixedly connected with a buffer plate, first servo electric cylinders which are symmetrically distributed are fixedly installed on the surface of one side of the annular fixing block, and one ends of piston rods of the two first servo electric cylinders are fixedly connected with the surface of one side of the buffer plate. And after single-face machining is completed, automatic clamping and overturning are achieved, so that the other face can be machined conveniently, the manual labor force is reduced, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a clamp for SMT patches. Background Art

[0002] SMT is surface assembly technology, which is the most popular technology and process in the electronic assembly industry. The surface assembly technology of electronic circuits is called surface mounting or surface installation technology. SMT patch refers to the abbreviation of a series of process flows based on PCB. PCB is a printed circuit board, which is the most popular technology and process in the electronic assembly industry. In the above-mentioned process of patch processing on PCB circuit boards, in order to prevent the circuit board from shifting, it is necessary to use a clamp to temporarily fix the circuit board for the convenience of staff operation. However, the existing SMT patch production clamps on the market have the following shortcomings during use: inconvenient operation, complex structure, and poor clamping effect in the actual clamping process.

[0003] For example, a clamp for SMT patch production disclosed in a Chinese patent document (publication number: CN211531452U) is provided. Although this patent provides a tread frame, a cross plate and two clamping mechanisms, when clamping the circuit board, the circuit board is placed under the rubber pads of the two clamping mechanisms, and then the worker inserts one foot into the tread frame and steps down, the fixed plate and the rubber pad of the clamping mechanism move down and press the circuit board, thereby clamping the circuit board. However, when the worker repeatedly presses down the tread frame with the sole of the foot for a long time, the leg will become sore, and double-sided operation is usually required for SMT veneer. Therefore, after the single-sided operation is completed, the clamping needs to be cancelled and the surface needs to be turned over manually before clamping and fixing, which results in a large labor force for the workers and low work efficiency. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides a clamp for SMT patches, which automatically clamps and fixes the processed circuit board, and has automatic clamping and flipping after processing on one side, so as to facilitate processing on the other side, which not only reduces manual labor but also improves processing efficiency.

[0005] The utility model provides a fixture for SMT patch, comprising a workbench, the upper surface of the workbench is fixedly connected with symmetrically distributed mounting blocks, the inner wall of the mounting block is installed with a rotating sleeve through a bearing, the outer surface of the rotating sleeve is fixedly sleeved with an annular fixed block, the inner wall of the rotating sleeve is movably sleeved with a telescopic rod, one end of the telescopic rod is fixedly connected with a buffer plate, one side surface of the annular fixed block is fixedly installed with symmetrically distributed first servo electric cylinders, and one end of the piston rods of two of the first servo electric cylinders are fixedly connected to one side surface of the buffer plate;

[0006] A clamping and flipping device is provided on the outer surface of one end of one of the rotating sleeves, and the clamping and flipping device includes a worm gear, and the inner wall of the worm gear is fixedly sleeved with the outer surface of one end of the rotating sleeve.

[0007] Preferably, one side surface of the buffer plate is provided with symmetrically distributed sliding holes, the inner wall of the sliding hole is movably sleeved with a buffer rod, and one end of two buffer rods are fixedly connected with a clamping plate.

[0008] Preferably, a buffer spring is movably sleeved on the outer surface of the buffer rod, one end of the two buffer springs are fixedly connected to one side surface of the splint, the other ends of the two buffer springs are fixedly connected to the other side surface of the buffer plate, and the other side surface of the splint is fixedly connected with symmetrically distributed positioning blocks.

[0009] Preferably, a second servo electric cylinder is fixedly mounted on the inner wall of one of the positioning blocks, one end of the piston rod of the second servo electric cylinder is fixedly connected to the first rubber pressure block, and a third servo electric cylinder is fixedly mounted on the inner wall of the other positioning block.

[0010] Preferably, one end of the piston rod of the third servo electric cylinder is fixedly connected to a second rubber pressure block, a servo motor is fixedly mounted on one side surface of one of the mounting blocks, and a worm is fixedly mounted on the output shaft of the servo motor via a coupling.

[0011] Preferably, the outer surface of the worm is meshed with the tooth surface of the worm wheel, a fourth servo electric cylinder is fixedly mounted on the inner wall of the workbench, and one end of the piston rod of the fourth servo electric cylinder is fixedly connected to the storage table.

[0012] Preferably, movable grooves which are symmetrically distributed are provided on both side surfaces of the storage table, and guide rods which are distributed in a rectangular array are fixedly connected to the lower surface of the storage table, and one end of each of the guide rods passes through and extends to the lower surface of the workbench.

[0013] The beneficial effects of the utility model are embodied in:

[0014] By setting up a clamping and flipping device, the processed circuit board can be automatically clamped and fixed, and after the single-side processing is completed, it has automatic clamping and flipping, so that the other side can be processed conveniently, which not only reduces manual labor but also improves the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0016] Figure 1 A front view of a SMT patch fixture provided by the utility model;

[0017] Figure 2 for Figure 1 A three-dimensional diagram of a clamping plate structure of a SMT patch fixture is shown;

[0018] Figure 3 for Figure 1 A three-dimensional diagram of the mounting block structure of a fixture for SMT patch shown;

[0019] Figure 4 for Figure 1 An exploded view of the buffer plate structure of a SMT patch fixture is shown.

[0020] In the accompanying drawings, 1. workbench, 2. mounting block, 3. rotating sleeve, 4. annular fixed block, 5. telescopic rod, 6. buffer plate, 7. first servo electric cylinder, 8. worm gear, 81. sliding hole, 82. buffer rod, 83. splint, 84. buffer spring, 85. positioning block, 86. second servo electric cylinder, 87. first rubber pressure block, 88. third servo electric cylinder, 89. second rubber pressure block, 810. servo motor, 811. worm, 812. fourth servo electric cylinder, 813. storage table, 814. movable groove, 815. guide rod. DETAILED DESCRIPTION

[0021] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0022] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0023] Reference Figure 1-4A fixture for SMT patch, including a workbench 1, the upper surface of the workbench 1 is fixedly connected with symmetrically distributed mounting blocks 2, the inner wall of the mounting block 2 is installed with a rotating sleeve 3 through a bearing, the outer surface of the rotating sleeve 3 is fixedly sleeved with an annular fixing block 4, the inner wall of the rotating sleeve 3 is movably sleeved with a telescopic rod 5, one end of the telescopic rod 5 is fixedly connected with a buffer plate 6, one side surface of the annular fixing block 4 is fixedly installed with symmetrically distributed first servo electric cylinders 7, one end of the piston rods of the two first servo electric cylinders 7 are fixedly connected to one side surface of the buffer plate 6;

[0024] A clamping and flipping device is disposed on the outer surface of one end of one of the rotating sleeves 3 , and the clamping and flipping device includes a worm gear 8 , and the inner wall of the worm gear 8 is fixedly sleeved with the outer surface of one end of the rotating sleeve 3 .

[0025] A symmetrically distributed sliding hole 81 is provided on one side surface of the buffer plate 6, and a buffer rod 82 is movably sleeved on the inner wall of the sliding hole 81. One end of the two buffer rods 82 is fixedly connected to a clamping plate 83, and a buffer spring 84 is movably sleeved on the outer surface of the buffer rod 82. Through the coordinated use of the buffer rod 82 and the buffer spring 84, the clamping plate 83 can buffer the force of clamping and positioning the circuit board to avoid damage to the circuit board. One end of the two buffer springs 84 is fixedly connected to one side surface of the clamping plate 83, and the other end of the two buffer springs 84 is fixedly connected to the other side surface of the buffer plate 6. A symmetrically distributed positioning block 85 is fixedly connected to the other side surface of the clamping plate 83, and a second servo electric cylinder 86 is fixedly installed on the inner wall of one of the positioning blocks 85. One end of the piston rod of the second servo electric cylinder 86 is fixedly connected to a first rubber pressing block 87. The first rubber pressing block 87 plays a role in preventing the circuit board from being scratched by the rubber when the circuit board is pressed down for positioning, and a third servo electric cylinder 88 is fixedly installed on the inner wall of the other positioning block 85.

[0026] One end of the piston rod of the third servo electric cylinder 88 is fixedly connected to the second rubber pressure block 89, and a servo motor 810 is fixedly installed on one side surface of one mounting block 2. A worm 811 is fixedly installed on the output shaft of the servo motor 810 through a coupling. The outer surface of the worm 811 is meshed with the tooth surface of the worm wheel 8. The self-locking characteristics of the worm 811 and the worm wheel 8 play a role in stabilizing the limit position after the circuit board is turned over. A fourth servo electric cylinder 812 is fixedly installed on the inner wall of the workbench 1, and one end of the piston rod of the fourth servo electric cylinder 812 is fixedly connected to a storage table 813. The two side surfaces of the storage table 813 are provided with movable grooves 814 that are symmetrically distributed. The movable grooves 814 facilitate the clamping and positioning of circuit boards of different sizes on the storage table 813. The lower surface of the storage table 813 is fixedly connected with guide rods 815 distributed in a rectangular array. The guide rods 815 play a role in cooperating with the storage table 813 to perform stable lifting and lowering. One end of the multiple guide rods 815 passes through and extends to the lower surface of the workbench 1.

[0027] By setting up a clamping and flipping device, the processed circuit board can be automatically clamped and fixed, and after the single-side processing is completed, it has automatic clamping and flipping, so that the other side can be processed conveniently, which not only reduces manual labor but also improves the processing efficiency.

[0028] Working principle: Step 1, place the circuit board to be processed on the storage table 813, and then start the piston rod of the first servo electric cylinder 7 to extend. The extension of the piston rod of the first servo electric cylinder 7 drives the two clamping plates 83 to move relative to each other through the cooperation of the buffer plate 6 and the buffer rod 82. The movement of the clamping plate 83 clamps and positions the two sides of the circuit board through the cooperation of the movable groove 814, and buffers and protects the clamping force through the cooperation of the buffer spring 84 to avoid damage to the circuit board. After clamping, start the second servo electric cylinder 86, and the extension of the piston rod of the second servo electric cylinder 86 drives the first rubber pressure block 87 to move downward, thereby cooperating with the storage table 813 to press down and position the circuit board. At this time, the upper surface of the circuit board can be processed;

[0029] Step 2: After the processing is completed, the piston rod of the third servo electric cylinder 88 is started to extend, and the bottom of the circuit board is positioned by the movement of the second rubber pressure block 89, so as to cooperate with the first rubber pressure block 87 to clamp the circuit board. At this time, the piston rod of the fourth servo electric cylinder 812 retracts, and the guide rod 815 cooperates to drive the storage table 813 to separate from the circuit board and move downward. At the same time, the servo motor 810 drives the worm 811 to rotate clockwise, and the rotation of the worm 811 drives the rotating sleeve 3 to rotate through the meshing worm gear 8. The rotation of the rotating sleeve 3 drives the clamping plate 83 to turn 180 degrees through the cooperation of the buffer plate 6 and the buffer rod 82, thereby driving the clamped circuit board to turn over;

[0030] Step three, after the flipping is completed, the servo motor 810 stops working, and the fourth servo electric cylinder 812 extends, driving the storage table 813 to move up and reset. At the same time, the piston rod of the second servo electric cylinder 86 drives the first rubber pressure block 87 to retract, and the piston rod of the third servo electric cylinder 88 drives the second rubber pressure block 89 to extend. The second rubber pressure block 89 is pressed down and cooperates with the storage table 813 to press down and position the flipped circuit board, thereby facilitating the processing of the other side of the circuit board.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A fixture for SMT patch, comprising a workbench (1), characterized in that: The upper surface of the workbench (1) is fixedly connected with symmetrically distributed mounting blocks (2); the inner wall of the mounting block (2) is mounted with a rotating sleeve (3) via a bearing; the outer surface of the rotating sleeve (3) is fixedly sleeved with an annular fixed block (4); the inner wall of the rotating sleeve (3) is movably sleeved with a telescopic rod (5); one end of the telescopic rod (5) is fixedly connected with a buffer plate (6); one side surface of the annular fixed block (4) is fixedly mounted with symmetrically distributed first servo electric cylinders (7); one end of the piston rods of the two first servo electric cylinders (7) are fixedly connected to one side surface of the buffer plate (6); A clamping and flipping device is provided on the outer surface of one end of one of the rotating sleeves (3), and the clamping and flipping device comprises a worm gear (8), and the inner wall of the worm gear (8) is fixedly sleeved with the outer surface of one end of the rotating sleeve (3).

2. The SMT patch fixture according to claim 1, characterized in that: A side surface of the buffer plate (6) is provided with symmetrically distributed sliding holes (81), the inner wall of the sliding hole (81) is movably sleeved with a buffer rod (82), and one end of each of the two buffer rods (82) is fixedly connected with a clamping plate (83).

3. The SMT patch fixture according to claim 2, characterized in that: The outer surface of the buffer rod (82) is movably sleeved with a buffer spring (84), one end of each of the two buffer springs (84) is fixedly connected to one side surface of the clamping plate (83), the other ends of each of the two buffer springs (84) are fixedly connected to the other side surface of the buffer plate (6), and the other side surface of the clamping plate (83) is fixedly connected with symmetrically distributed positioning blocks (85).

4. The SMT patch fixture according to claim 3, characterized in that: A second servo electric cylinder (86) is fixedly mounted on the inner wall of one of the positioning blocks (85), one end of the piston rod of the second servo electric cylinder (86) is fixedly connected to a first rubber pressure block (87), and a third servo electric cylinder (88) is fixedly mounted on the inner wall of the other positioning block (85).

5. The SMT patch fixture according to claim 4, characterized in that: One end of the piston rod of the third servo electric cylinder (88) is fixedly connected to a second rubber pressure block (89), a servo motor (810) is fixedly mounted on a side surface of one of the mounting blocks (2), and a worm (811) is fixedly mounted on the output shaft of the servo motor (810) via a coupling.

6. The SMT patch fixture according to claim 5, characterized in that: The outer surface of the worm (811) meshes with the tooth surface of the worm wheel (8); a fourth servo electric cylinder (812) is fixedly mounted on the inner wall of the workbench (1); one end of the piston rod of the fourth servo electric cylinder (812) is fixedly connected to a storage table (813).

7. The SMT patch fixture according to claim 6, characterized in that: The two side surfaces of the storage platform (813) are provided with symmetrically distributed movable grooves (814), and the lower surface of the storage platform (813) is fixedly connected with guide rods (815) distributed in a rectangular array, and one end of a plurality of the guide rods (815) passes through and extends to the lower surface of the workbench (1).

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