CN109548317B

CN109548317B - High-precision alignment device and method for unilateral bonding pad

Info

Publication number: CN109548317B
Application number: CN201910016775.0A
Authority: CN
Inventors: 陈静宇
Original assignee: Guangde Sanyo Electronics Co ltd
Current assignee: Anhui Dongou Electronic Technology Co ltd
Priority date: 2019-01-08
Filing date: 2019-01-08
Publication date: 2021-05-18
Anticipated expiration: 2039-01-08
Also published as: CN109548317A

Abstract

The invention discloses a high-precision alignment device and a high-precision alignment method for a unilateral bonding pad, wherein the high-precision alignment device for the unilateral bonding pad comprises a workbench, first clamping mechanisms which are symmetrically distributed are arranged on the left side and the right side of the top end of the workbench, second clamping mechanisms are arranged on the first clamping mechanisms, an installation cavity is arranged in the workbench, a patch positioning mechanism is arranged in the installation cavity, a partition plate is arranged on the top end of the installation cavity, and the upper end surface of the partition plate is flush with the upper end surface of the workbench.

Description

High-precision alignment device and method for unilateral bonding pad

Technical Field

The invention relates to the technical field of circuit board processing, in particular to a high-precision alignment device and method for a unilateral bonding pad.

Background

The circuit board, namely the circuit board, is also called as a printed circuit board or a printed circuit board, so that the circuit is miniaturized and visualized, and plays an important role in the batch production of fixed circuits and the optimization of the layout of electrical appliances. In the production process of the circuit board, pins of the elements pass through lead holes on the PCB and are fixed on the PCB by soldering tin, the lead holes and the copper foil around the lead holes are called as bonding pads, and the bonding pads are connected through printed leads on the PCB, so that the electrical connection of the elements in the circuit can be realized. In the circuit board processing process, the SMT paster is a processing mode which is commonly used at present. SMT is Surface mount Technology (Surface Mounted Technology), an acronym for Surface Mounted Technology, which is one of the most popular techniques and devices in the electronic assembly industry. The surface-mounted component (SMC/SMD, chip component in Chinese) with no pins or short leads is mounted on the surface of a Printed Circuit Board (PCB) or other substrates, and is soldered and assembled by means of reflow soldering, dip soldering and the like.

When the current SMT chip mounter carries out welding process, the circuit board is inconvenient to fix, and due to the reasons such as unstable circuit board clamping, errors easily appear in the counterpoint of component and circuit board upper bonding pad during welding, influence the precision of product.

Disclosure of Invention

The present invention is directed to a high-precision alignment apparatus and method for a single-sided pad, so as to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a high accuracy aligning device to unilateral pad, includes the workstation, workstation top left and right sides is provided with the first fixture of symmetric distribution, install second fixture on the first fixture, the inside installation cavity that is provided with of workstation, be provided with paster positioning mechanism in the installation cavity, the installation cavity top is provided with the baffle, the up end of baffle and the up end looks parallel and level of workstation.

Preferably, the first clamping mechanism comprises an electric push rod, the electric push rod is fixedly installed at the top end of the workbench, a clamping plate is fixedly connected with the telescopic end of the electric push rod, and the second clamping mechanism is arranged on the clamping plate.

Preferably, the upper end face of the partition board is provided with a sliding groove, and the clamping plate is slidably mounted on the sliding groove.

Preferably, the second clamping mechanism comprises a first clamping block and a second clamping block, a mounting groove is formed in the surface of one end, away from the electric push rod, of the clamping plate, a driving mechanism is arranged inside the mounting groove, the first clamping block and the second clamping block are connected to the driving mechanism, and the first clamping block and the second clamping block are located on the same horizontal line.

Preferably, the driving mechanism includes a first motor, the first motor is installed inside the clamping plate, an output end of the first motor extends into the mounting groove and is fixedly installed with a first bevel gear, a first screw rod and a second screw rod which are symmetrically distributed are arranged on the front side and the rear side of the first bevel gear, the rear end of the first screw rod and the front end of the second screw rod are both rotatably connected to the inner side wall of the mounting groove, a second bevel gear is fixedly installed on the front end of the first screw rod, a third bevel gear is fixedly installed on the rear end of the second screw rod, the second bevel gear and the third bevel gear are both engaged with the first bevel gear, a first slider is installed on the first screw rod, a second slider is installed on the second screw rod, the first slider and the second slider are both slidably installed in the mounting groove, and the first clamping block is fixed on the first slider, the second clamping block is fixed on the second sliding block.

Preferably, the anti-slip teeth are arranged on the surfaces of the opposite ends of the first clamping block and the second clamping block.

Preferably, the patch positioning mechanism comprises a positioning magnet, a moving mechanism is arranged at the bottom end inside the installation cavity, the positioning magnet is fixed at the top end of the moving mechanism, and the partition plate is a transparent heat insulation plate.

Preferably, moving mechanism includes first slide, first slide slidable mounting is in the inside bottom of installation cavity, install the second motor in the installation cavity, the output of second motor is connected with first lead screw, the one end that the second motor was kept away from to first lead screw is rotated and is connected on the installation cavity inside wall, first slide is installed on first lead screw, the shifting chute has been seted up to the up end of first slide, install the second lead screw in the shifting chute, the extending direction looks perpendicular of second lead screw and first lead screw, the third motor is installed to the one end of shifting chute, the output of third motor extends to in the shifting chute and is connected with the second lead screw, install the second slide on the second lead screw, second slide slidable mounting is on first slide top, location magnet fixed mounting is at the second slide.

Preferably, a high-precision alignment method for a single-sided pad includes the following steps:

1) placing the circuit board on a workbench, and starting an electric push rod to enable the left and right clamping plates to clamp the circuit board;

2) starting a first motor to enable a first clamping block and a second clamping block on the clamping plate to be in tandem to further clamp the circuit board;

3) the workbench is conveyed to a patch welding station, the second motor and the third motor are started, the positioning magnet moves to the position right below a pad to be processed on the circuit board, the patch element is placed on the position of the pad to be processed of the circuit board, and the patch element is adsorbed on the position to be welded under the action of magnetic force.

Compared with the prior art, the invention has the beneficial effects that: when a circuit board is clamped, the circuit board is placed at the top end of a workbench, an electric push rod extends to enable a left clamping plate and a right clamping plate to move relatively, the left end and the right end of the circuit board are clamped and fixed, then a first motor drives a first bevel gear to rotate, a first screw and a second screw are driven to rotate through meshing action, so that a first clamping block and a second clamping block are driven to move relatively, the front end and the rear end of the circuit board are clamped and fixed, and the circuit board is fixed; the first clamping mechanism and the second clamping mechanism can adapt to circuit boards with different sizes, so that when the specifications of the circuit boards are changed, the device does not need to be changed, and the adaptability is wide; the sliding groove plays a role in guiding the movement of the clamping plate and keeps the movement level of the clamping plate stable; the anti-slip teeth increase the friction force between the clamping blocks and the circuit board and improve the clamping stability; it is rotatory through the first lead screw of second motor drive, it removes to drive first slide, third motor drive second lead screw is rotatory simultaneously, it removes to drive the second slide, the moving direction mutually perpendicular of first slide and second slide, thereby can transport arbitrary point on the horizontal plane with location magnet, transport location magnet and correspond the paster department under, thereby can adsorb the paster component of placing on the circuit board, play the fixed effect to paster component, prevent the component skew. The invention has simple structure, low manufacturing cost, easy production, good fixing effect on the circuit board, convenient use, simple positioning of the circuit board and the patch element and improvement of the yield of products.

Drawings

FIG. 1 is a schematic structural diagram of a high-precision alignment apparatus for a single-sided bonding pad;

FIG. 2 is a schematic structural diagram of a first clamping mechanism in a high-precision alignment device for a single-sided bonding pad;

FIG. 3 is a schematic structural diagram of a second clamping mechanism in the high-precision alignment apparatus for a single-sided bonding pad;

fig. 4 is a schematic structural diagram of a chip positioning mechanism in a high-precision alignment device for a single-sided pad.

In the figure: 1-workbench, 2-first clamping mechanism, 3-second clamping mechanism, 4-installation cavity, 5-patch positioning mechanism, 6-partition plate, 7-electric push rod, 8-clamping plate, 9-sliding chute, 10-first motor, 11-installation groove, 12-first screw, 13-second screw, 14-second bevel gear, 15-third bevel gear, 16-first bevel gear, 17-first sliding block, 18-first clamping block, 19-second sliding block, 20-second clamping block, 21-first sliding plate, 22-second motor, 23-first screw, 24-moving groove, 25-second screw, 26-third motor, 27-second sliding plate and 28-positioning magnet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a technical solution: the utility model provides a high accuracy aligning device to unilateral pad, includes workstation 1, the 1 top left and right sides of workstation is provided with the first fixture 2 of symmetric distribution, install second fixture 3 on the

first fixture

2, 1 inside installation cavity 4 that is provided with of workstation, be provided with paster positioning mechanism 5 in the

installation cavity

4, 4 tops of installation cavity are provided with baffle 6, the up end of baffle 6 and the up end looks parallel and level of workstation 1.

First fixture 2 includes electric putter 7, electric putter 7 fixed mounting is on 1 top of workstation, electric putter 7's flexible end fixedly connected with grip block 8, second fixture 3 sets up on grip block 8.

The upper end face of the partition plate 6 is provided with a sliding groove 9, the clamping plate 8 is slidably mounted on the sliding groove 9, and the sliding groove 9 plays a role in guiding the movement of the clamping plate 8 and keeps the movement level of the clamping plate 8 stable.

Second fixture 3 includes first grip block 18 and second grip block 20, mounting groove 11 has been seted up to the one end surface that electric putter 7 was kept away from to grip block 8, the inside actuating mechanism that is provided with of mounting groove 11, first grip block 18 is connected on actuating mechanism with second grip block 20, and first grip block 18 is in same water flat line with second grip block 20.

The driving mechanism comprises a first motor 10, the first motor 10 is installed inside the clamping plate 8, the output end of the first motor 10 extends into the installation groove 11 and is fixedly installed with a first bevel gear 16, the front side and the back side of the first bevel gear 16 are provided with a first screw 12 and a second screw 13 which are symmetrically distributed, the rear end of the first screw 12 and the front end of the second screw 13 are rotatably connected on the inner side wall of the installation groove 11, the front end of the first screw 12 is fixedly installed with a second bevel gear 14, the rear end of the second screw 13 is fixedly installed with a third bevel gear 15, the second bevel gear 14 and the third bevel gear 15 are both meshed with the first bevel gear 16, the first screw 12 is installed with a first slide block 17, the second screw 13 is installed with a second slide block 19, and the first slide block 17 and the second slide block 19 are both slidably installed in the installation groove 11, the first clamping block 18 is fixed on the first slide block 17, and the second clamping block 20 is fixed on the second slide block 19.

The surfaces of the opposite ends of the first clamping block 18 and the second clamping block 20 are provided with anti-slip teeth, and the anti-slip teeth increase the friction force between the clamping blocks and the circuit board, so that the clamping stability is improved.

When a circuit board is clamped, the circuit board is placed at the top end of the workbench 1, the electric push rod 7 extends to enable the left clamping plate 8 and the right clamping plate 8 to move relatively, the left end and the right end of the circuit board are clamped and fixed, then the first motor 10 drives the first bevel gear 16 to rotate, and drives the first screw 12 and the second screw 13 to rotate through meshing action, so that the first clamping block 18 and the second clamping block 20 are driven to move relatively, the front end and the rear end of the circuit board are clamped and fixed, and the circuit board fixing process is completed; first fixture and second fixture can adapt to the not circuit board of equidimension to when the circuit board specification changes, need not make the change to the device, adaptability is wide.

The paster positioning mechanism 5 comprises a positioning magnet 28, a moving mechanism is arranged at the bottom end inside the installation cavity 4, the positioning magnet 28 is fixed at the top end of the moving mechanism, and the partition plate 6 is a transparent heat insulation plate.

The moving mechanism comprises a first sliding plate 21, the first sliding plate 21 is slidably mounted at the bottom end inside the mounting cavity 4, a second motor 22 is mounted in the mounting cavity 4, the output end of the second motor 22 is connected with a first lead screw 23, one end, far away from the second motor 22, of the first lead screw 23 is rotatably connected to the inner side wall of the mounting cavity 4, the first sliding plate 21 is mounted on the first lead screw 23, a moving groove 24 is formed in the upper end face of the first sliding plate 21, a second lead screw 25 is mounted in the moving groove 24, the second lead screw 25 is perpendicular to the extending direction of the first lead screw 23, a third motor 26 is mounted at one end of the moving groove 24, the output end of the third motor 26 extends into the moving groove 24 and is connected with the second lead screw 25, a second sliding plate 27 is mounted on the second lead screw 25, and the second sliding plate 27 is slidably mounted at the top end of the first sliding plate 21, the positioning magnet 28 is fixedly mounted on the second slide plate 27.

It is rotatory to drive first lead screw 23 through second motor 22, it removes to drive first slide 21, third motor 26 drives second lead screw 25 simultaneously and rotates, it removes to drive second slide 27, first slide 21 and second slide 27's moving direction mutually perpendicular, thereby can transport arbitrary point on the horizontal plane with positioning magnet 28, transport positioning magnet 28 and correspond paster department under, thereby can adsorb the paster component of placing on the circuit board, play the fixed effect to the paster component, prevent the component skew.

A high-precision alignment method for a unilateral bonding pad comprises the following steps:

1) placing the circuit board on the workbench 1, and starting the electric push rod 7 to enable the left and right clamping plates 8 to clamp the circuit board tightly;

2) starting the first motor 10 to enable the first clamping block 18 and the second clamping block 20 on the clamping plate 8 to be in tandem to further clamp the circuit board;

3) the workbench 1 is conveyed to a chip welding station, the second motor 22 and the third motor 26 are started, the positioning magnet 28 moves to the position right below a pad to be processed on the circuit board, then the chip element is placed on the position of the pad to be processed on the circuit board, and under the action of magnetic force, the chip element is adsorbed on the position to be welded.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a high accuracy aligning device to unilateral pad, includes workstation (1), its characterized in that: first clamping mechanisms (2) which are symmetrically distributed are arranged on the left side and the right side of the top end of the workbench (1), second clamping mechanisms (3) are mounted on the first clamping mechanisms (2), an installation cavity (4) is arranged inside the workbench (1), a patch positioning mechanism (5) is arranged in the installation cavity (4), a partition plate (6) is arranged on the top end of the installation cavity (4), and the upper end face of the partition plate (6) is flush with the upper end face of the workbench (1);

the first clamping mechanism (2) comprises an electric push rod (7), the electric push rod (7) is fixedly installed at the top end of the workbench (1), a clamping plate (8) is fixedly connected with the telescopic end of the electric push rod (7), and the second clamping mechanism (3) is arranged on the clamping plate (8);

second fixture (3) include first grip block (18) and second grip block (20), mounting groove (11) have been seted up to grip block (8) one end surface of keeping away from electric putter (7), mounting groove (11) inside is provided with actuating mechanism, first grip block (18) are connected on actuating mechanism with second grip block (20), and first grip block (18) are in same water flat line with second grip block (20).

2. The high-precision alignment device for the one-sided bonding pad according to claim 1, wherein: the upper end face of the partition plate (6) is provided with a sliding groove (9), and the clamping plate (8) is slidably mounted on the sliding groove (9).

3. The high-precision alignment device for the one-sided bonding pad according to claim 1, wherein: the driving mechanism comprises a first motor (10), the first motor (10) is installed inside the clamping plate (8), the output end of the first motor (10) extends into the installation groove (11) and is fixedly provided with a first bevel gear (16), the front side and the rear side of the first bevel gear (16) are provided with a first screw (12) and a second screw (13) which are symmetrically distributed, the rear end of the first screw (12) and the front end of the second screw (13) are rotatably connected to the inner side wall of the installation groove (11), the front end of the first screw (12) is fixedly provided with a second bevel gear (14), the rear end of the second screw (13) is fixedly provided with a third bevel gear (15), the second bevel gear (14) and the third bevel gear (15) are respectively connected with the first bevel gear (16) in a meshed manner, the first sliding block (17) is installed on the first screw (12), install second slider (19) on second screw rod (13), first slider (17) and equal slidable mounting of second slider (19) are in mounting groove (11), first grip block (18) are fixed on first slider (17), second grip block (20) are fixed on second slider (19).

4. The high-precision alignment device for the one-sided bonding pad according to claim 3, wherein: the anti-skidding teeth are arranged on the surfaces of one ends, opposite to each other, of the first clamping block (18) and the second clamping block (20).

5. The high-precision alignment device for the one-sided bonding pad according to claim 1, wherein: the patch positioning mechanism (5) comprises a positioning magnet (28), a moving mechanism is arranged at the bottom end inside the installation cavity (4), the positioning magnet (28) is fixed at the top end of the moving mechanism, and the partition plate (6) is a transparent heat insulation plate.

6. The high-precision alignment device for the one-sided bonding pad according to claim 5, wherein: the moving mechanism comprises a first sliding plate (21), the first sliding plate (21) is slidably mounted at the bottom end inside the mounting cavity (4), a second motor (22) is mounted in the mounting cavity (4), the output end of the second motor (22) is connected with a first screw rod (23), one end, far away from the second motor (22), of the first screw rod (23) is rotatably connected onto the inner side wall of the mounting cavity (4), the first sliding plate (21) is mounted on the first screw rod (23), a moving groove (24) is formed in the upper end face of the first sliding plate (21), a second screw rod (25) is mounted in the moving groove (24), the second screw rod (25) is perpendicular to the extending direction of the first screw rod (23), a third motor (26) is mounted at one end of the moving groove (24), the output end of the third motor (26) extends into the moving groove (24) and is connected with the second screw rod (25), and a second sliding plate (27) is arranged on the second screw rod (25), the second sliding plate (27) is slidably arranged at the top end of the first sliding plate (21), and the positioning magnet (28) is fixedly arranged on the second sliding plate (27).

7. A high-precision alignment method for a unilateral bonding pad is characterized by comprising the following steps: the method comprises the following steps:

1) placing the circuit board on the workbench (1), and starting the electric push rod (7) to enable the left and right clamping plates (8) to clamp the circuit board tightly;

2) starting a first motor (10) to enable a first clamping block (18) and a second clamping block (20) on the clamping plate (8) to be in tandem to further clamp the circuit board;

3) the workbench (1) is conveyed to a patch welding station, the second motor (22) and the third motor (26) are started, the positioning magnet (28) moves to the position right below a pad to be processed on the circuit board, the patch element is placed on the position of the pad to be processed on the circuit board, and the patch element is adsorbed on the position to be welded under the action of magnetic force.