Positioning clamp for circuit board processing

Abstract

The utility model discloses a positioning fixture for circuit board processing, which comprises a rack, a substrate is fixed in the middle of the rack, a base plate is fixed on the upper surface of the substrate through screws, a circuit board and an aluminum-coated plate for drilling and protecting the circuit board are sequentially arranged above the base plate, and the aluminum-coated plate is fixed on the base plate through screws. A positioning rod for primarily positioning the circuit board is arranged on the upper surface of the base plate; the movable cross beam capable of moving back and forth is arranged, the movable cross beam drives the handheld riveting machine to rivet and fix the top edge and the bottom edge of the circuit board, traditional manual riveting is replaced, the compression roller with the two thin ends and the thick middle is arranged so that the compression roller can compress adhesive tape adhered to the two sides of the circuit board, half of the adhesive tape is adhered to an aluminum-coated plate, and the adhesive tape is prevented from being adhered to the aluminum-coated plate. And the other half of the adhesive tape is adhered to the surface of the base plate, so that the aluminum-coated plate is fixed by the adhesive tape, manual adhesive tape pressing is replaced, and the positioning efficiency of the circuit board can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board processing, in particular to a positioning fixture for circuit board processing. Background Art

[0002] Currently, when drilling holes in a circuit board, the circuit board needs to be fixed on the pad with pins, and then an aluminum plate for protecting the circuit board drilling is covered on the surface of the circuit board, and the four corners of the aluminum plate are fixed with tape. After the circuit board is processed, the tape and pins are removed.

[0003] Chinese patent CN214920803U discloses a processing equipment, including a workbench, a fixture, a plurality of positioning members for positioning a circuit board, and a milling cutter assembly for processing the circuit board. The fixture is detachably connected to the workbench by detachably mounting a plurality of positioning members on the fixture. In the process of positioning the circuit board, a plurality of positioning members can be firstly mounted on the fixture, and the positioning of the circuit board can be achieved by the plurality of positioning members. Compared with the traditional operation method of inserting and removing pins on a large-sized workbench, the device installs a plurality of positioning members on the fixture. On the one hand, it saves the time of drilling holes and installing positioning members on the large-sized workbench; on the other hand, the disassembly and assembly of the plurality of positioning members are convenient and quick, thereby improving the processing efficiency.

[0004] The device positions the circuit board by directly fixing a cylindrical positioning piece on the surface of the pad, and a number of positioning posts penetrate the circuit board. However, this method requires the side holes of the circuit board to be aligned with each positioning post. Since multiple positioning posts are required to fix the circuit board, and the diameter of the positioning holes cannot be too large relative to the diameter of the positioning posts, simultaneous alignment is difficult and still time-consuming. Utility Model Content

[0005] The purpose of the utility model is to provide a positioning fixture for circuit board processing, so as to solve the problem that the prior art mentioned in the background technology adopts the method of fixing the positioning column on the surface of the pad and inserting the circuit board to position the circuit board, but the positioning is still relatively time-consuming because the positioning column is difficult to insert into position.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning fixture for circuit board processing, comprising a frame, a base plate is fixed in the middle of the frame, a pad is fixed to the upper surface of the base plate by screws, a circuit board and an aluminum plate for protecting the circuit board from drilling holes are arranged in sequence above the pad, a positioning rod for preliminary positioning of the circuit board is arranged on the upper surface of the pad, longitudinal electric slides are installed at both ends of the top of the frame, a movable crossbeam is arranged on the top of the frame, the two ends of the movable crossbeam are respectively fixedly connected to the slides of two longitudinal electric slides, a bracket is slidably connected to one side of the movable crossbeam, a handheld riveter for fixing the circuit board is fixed to one side of the bracket by screws, a tape pressing structure for facilitating the positioning of the aluminum plate is arranged on one side of the handheld riveter, and a driving mechanism for driving the bracket to move horizontally is arranged on one side of the movable crossbeam.

[0007] Preferably, the tape pressing structure includes a cylinder, which is fixedly connected to the bracket by screws, a fixed tube is fixed to the telescopic end of the cylinder, a sliding groove is provided in the fixed tube, a pressure rod is slidably connected in the sliding groove, a spring is fixed in the sliding groove, one end of the spring is fixedly connected to the top of the pressure rod, and a limit block is fixed to the top of the pressure rod to prevent the pressure rod from popping out of the sliding groove.

[0008] Preferably, the tape pressing structure further comprises a pressing roller, a cam-shaped frame is fixed to the bottom end of the pressing rod, and two ends of the pressing roller are rotatably connected to two sides of the cam-shaped frame.

[0009] Preferably, the pressing roller comprises a middle pressing portion and two end pressing portions, and the diameters of the two end pressing portions are smaller than the diameter of the middle pressing portion in the range of 2 mm to 5 mm.

[0010] Preferably, a plurality of the pads are provided, and two positioning rods are provided on the upper surface of each of the pads, the two positioning rods are respectively located at diagonally opposite corners of the pad, and the positioning rods penetrate the circuit board.

[0011] Preferably, the driving mechanism includes a screw and a driving motor for driving the screw to rotate, the driving motor is fixed to one end of the moving beam by a screw, and the screw passes through the bracket and is threadedly connected to the bracket.

[0012] Preferably, the driving mechanism further comprises a guide groove, the guide groove is provided on one side of the movable cross beam, the screw rod is rotatably connected in the guide groove, and the bracket is slidably connected in the guide groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides a movable crossbeam that can move forward and backward, and the movable crossbeam drives a hand-held riveting machine to fix the top and bottom edges of the circuit board with rivets, thereby replacing traditional manual riveting. A pressure roller with thin ends and a thick middle portion is provided, so that the pressure roller can press the tape adhered to the two sides of the circuit board, so that half of the tape adheres to the aluminum-clad plate and the other half adheres to the surface of the pad, thereby fixing the aluminum-clad plate with the tape, thereby replacing manual pressing of the tape. The arrangement of the device can improve the positioning efficiency of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an axonometric drawing of the utility model;

[0016] Figure 2 It is a schematic diagram of the external structure of the tape pressing structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the internal structure of the tape pressing structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the positions of the aluminum clad plate and the circuit board of the utility model.

[0019] In the figure: 1. frame; 2. base plate; 3. pad; 4. circuit board; 5. aluminum plate; 6. positioning rod; 7. longitudinal electric slide; 8. moving beam; 9. bracket; 10. hand-held riveter; 11. tape pressing structure; 12. driving mechanism; 1101. cylinder; 1102. fixed cylinder; 1103. slide; 1104. pressure rod; 1105. spring; 13. pressure roller; 1106. shaped frame; 1301. middle pressing part; 1302. pressing parts at both ends; 1201. screw rod; 1202. driving motor; 1203. guide groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4The utility model provides a technical solution: a positioning fixture for circuit board processing, comprising a frame 1, a base plate 2 is fixed to the middle of the frame 1, a pad 3 is fixed to the upper surface of the base plate 2 by screws, a circuit board 4 and an aluminum plate 5 for drilling protection of the circuit board 4 are arranged in sequence above the pad 3, a positioning rod 6 for preliminary positioning of the circuit board 4 is arranged on the upper surface of the pad 3, longitudinal electric slides 7 are installed at both ends of the top of the frame 1, a moving crossbeam 8 is arranged on the top of the frame 1, the two ends of the moving crossbeam 8 are respectively fixedly connected to the slides of two longitudinal electric slides 7, a bracket 9 is slidably connected to one side of the moving crossbeam 8, a handheld riveter 10 for fixing the circuit board 4 is fixed to one side of the bracket 9 by screws, a tape pressing structure 11 for positioning the aluminum plate 5 is arranged on one side of the handheld riveter 10, and a driving mechanism 12 for driving the bracket 9 to move horizontally is arranged on one side of the moving crossbeam 8.

[0022] The tape clamping structure 11 includes a cylinder 1101, which is fixedly connected to the bracket 9 by screws. A fixed cylinder 1102 is fixed to the telescopic end of the cylinder 1101, a slide groove 1103 is opened in the fixed cylinder 1102, a pressure rod 1104 is slidably connected in the slide groove 1103, a spring 1105 is fixed in the slide groove 1103, one end of the spring 1105 is fixedly connected to the top of the pressure rod 1104, and a limit block is fixed to the top of the pressure rod 1104 to prevent the pressure rod 1104 from popping out of the slide groove 1103. By setting the cylinder 1101, after the cylinder 1101 is started, the telescopic end of the cylinder 1101 drives the fixed cylinder 1102 to descend, so that the pressure roller 13 moves downward, and the setting of the spring 1105 can make the pressure roller 13 press the tape on the surface of the aluminum-coated plate 5, half of the tape adheres to the surface of the aluminum-coated plate 5, and the other half adheres to the pad 3, so that the tape can be positioned on the aluminum-coated plate 5.

[0023] The tape pressing structure 11 further includes a pressing roller 13 . A cam frame 1106 is fixed to the bottom end of the pressing rod 1104 . Both ends of the pressing roller 13 are rotatably connected to both sides of the cam frame 1106 .

[0024] The pressing roller 13 includes a middle pressing part 1301 and two end pressing parts 1302. The diameter of the two end pressing parts 1302 is smaller than the diameter of the middle pressing part 1301 by 2mm-5mm. By setting the pressing roller 13 to be thin at both ends and thick in the middle, when the pressing roller 13 is pasting the tape on the left side of the circuit board 4, the thin end of the right end is pressed against the surface of the aluminum-clad plate 5, and the thick end of the middle part is pressed against the pad 3; when the tape is pasted on the right side of the circuit board 4, the thin end of the left end is pressed against the surface of the aluminum-clad plate 5, so as to adapt to the height of the circuit board 4 and the aluminum-clad plate 5, and solve the problem that the convex edge of the circuit board 4 and the pad 3 are not well adhered and pressed.

[0025] There are several backing plates 3, and two positioning rods 6 are provided on the upper surface of each backing plate 3. The two positioning rods 6 are respectively located at diagonally opposite corners of the backing plate 3, and the positioning rods 6 penetrate the circuit board 4. The circuit board 4 is initially positioned by providing two positioning rods 6 to avoid the circuit board 4 from being deflected when the rivets of the circuit board 4 are manually pressed.

[0026] The driving mechanism 12 includes a screw rod 1201 and a driving motor 1202 for driving the screw rod 1201 to rotate. The driving motor 1202 is fixed to one end of the moving beam 8 by screws. The screw rod 1201 passes through the bracket 9 and is threadedly connected to the bracket 9.

[0027] The driving mechanism 12 further comprises a guide groove 1203, which is provided on one side of the moving beam 8, the screw rod 1201 is rotatably connected in the guide groove 1203, and the bracket 9 is slidably connected in the guide groove 1203. When the driving motor 1202 is started, the screw rod 1201 rotates, and the bracket 9 slides in the guide groove 1203.

[0028] When in use, align the two corners of the circuit board 4 with the positioning rod 6. After the circuit board 4 is initially positioned on the pad 3, start the longitudinal electric slide 7, so that the movable crossbeam 8 drives the handheld riveter 10 to move forward and backward. When the handheld riveter 10 rivets the top of the circuit board 4, manually press the circuit board 4. After the top edge is fixed, fix the bottom edge in this way. After the positioning of the circuit board 4 is completed, manually cover the circuit board 4 with the aluminum-coated plate 5, and pull out one end of the tape and stick it on one side of the aluminum-coated plate 5. Start the longitudinal electric slide 7 and the cylinder 1101, so that the pressure roller 13 presses the tape pasted on the edge of the aluminum-coated plate 5; an aluminum-coated plate 5 only needs to be pasted with tape on two side edges.

[0029] By setting the pressing roller 13 to be thin at both ends and thick in the middle, when the pressing roller 13 is pasting the tape on the left side of the circuit board 4, the thin end of the right end is pressed against the surface of the aluminum-clad plate 5, and the thick end in the middle is pressed against the pad 3; when the tape is pasted on the right side of the circuit board 4, the thin end of the left end is pressed against the surface of the aluminum-clad plate 5, so as to adapt to the height of the circuit board 4 and the aluminum-clad plate 5, and solve the problem that the convex edge of the circuit board 4 and the tape on the pad 3 are not well adhered and pressed.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for circuit board processing, characterized in that: The invention comprises a frame (1), a base plate (2) is fixed in the middle of the frame (1), a pad (3) is fixed on the upper surface of the base plate (2) by screws, a circuit board (4) and an aluminum plate (5) for drilling protection of the circuit board (4) are arranged in sequence above the pad (3), a positioning rod (6) for preliminary positioning of the circuit board (4) is arranged on the upper surface of the pad (3), longitudinal electric slides (7) are installed at both ends of the top of the frame (1), and a movable crossbeam (8) is arranged on the top of the frame (1) The two ends of the movable crossbeam (8) are respectively fixedly connected to the slides of the two longitudinal electric slides (7); one side of the movable crossbeam (8) is slidably connected to a bracket (9); one side of the bracket (9) is fixed with a hand-held riveter (10) for fixing the circuit board (4) by screws; one side of the hand-held riveter (10) is provided with a tape pressing structure (11) for locating the aluminum plate (5); and one side of the movable crossbeam (8) is provided with a driving mechanism (12) for driving the bracket (9) to move horizontally.

2. A positioning fixture for circuit board processing according to claim 1, characterized in that: The tape pressing structure (11) comprises a cylinder (1101), wherein the cylinder (1101) is fixedly connected to the bracket (9) by means of screws, a fixed cylinder (1102) is fixedly provided at the telescopic end of the cylinder (1101), a slide groove (1103) is provided in the fixed cylinder (1102), a pressure rod (1104) is slidably connected in the slide groove (1103), a spring (1105) is fixed in the slide groove (1103), one end of the spring (1105) is fixedly connected to the top of the pressure rod (1104), and a limit block is fixedly provided at the top of the pressure rod (1104) for preventing the pressure rod (1104) from popping out of the slide groove (1103).

3. A positioning fixture for circuit board processing according to claim 2, characterized in that: The tape pressing structure (11) further comprises a pressing roller (13), a cam-shaped frame (1106) is fixed to the bottom end of the pressing rod (1104), and two ends of the pressing roller (13) are rotatably connected to two sides of the cam-shaped frame (1106).

4. A positioning fixture for circuit board processing according to claim 3, characterized in that: The pressing roller (13) comprises a middle pressing portion (1301) and two end pressing portions (1302), and the diameter of the two end pressing portions (1302) is smaller than the diameter of the middle pressing portion (1301) in the range of 2 mm to 5 mm.

5. A positioning fixture for circuit board processing according to claim 4, characterized in that: A plurality of pads (3) are provided, and two positioning rods (6) are provided on the upper surface of each pad (3). The two positioning rods (6) are respectively located at diagonally opposite corners of the pad (3), and the positioning rods (6) penetrate the circuit board (4).

6. A positioning fixture for circuit board processing according to claim 1, characterized in that: The driving mechanism (12) comprises a screw rod (1201) and a driving motor (1202) for driving the screw rod (1201) to rotate. The driving motor (1202) is fixed to one end of the moving crossbeam (8) by means of screws. The screw rod (1201) passes through the bracket (9) and is threadedly connected to the bracket (9).

7. A positioning fixture for circuit board processing according to claim 6, characterized in that: The driving mechanism (12) further comprises a guide groove (1203), wherein the guide groove (1203) is provided on one side of the movable crossbeam (8), the screw rod (1201) is rotatably connected in the guide groove (1203), and the bracket (9) is slidably connected in the guide groove (1203).

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