JPH07183693A - Non-standard shape component mounting apparatus - Google Patents

Abstract

PURPOSE:To change mounting pressure of a suction nozzle to an appropriate value according to a type of non-standard shape component by measuring a height of a suction face of the component provided on a mounting head and controlling a lifting/lowering amount of a suction nozzle means based on the measured height of the suction face. CONSTITUTION:When A non-standard shape component 1 is mounted onto a printed board 14, a mounting head 12 is moved by an X-Y slider 13 to position a suction nozzle 2 at the component 1 to be sucked. Then a measuring device 11 is used to measure a relative distance from a suction face 1a of the component 1. Based on this measurement, the suction nozzle 2 is lowered together with a nozzle shaft 3 by a servo motor 10 and a ball screw 9, the component 1 is sucked by vacuum pressure and positioned at a portion for mounting on the printed board 14, and the component 1 is mounted on the printed board 14 by backup operation of a backup unit 15. Thus mounting pressure of the suction nozzle 2 can be changed, thereby preventing the part from shifting in position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface mount device,
In particular, it relates to a mounting machine for odd-shaped electronic components (electronic components that are not standardized).

[0002]

2. Description of the Related Art In a conventional odd-shaped component mounting machine as shown in FIG. 3 (a), a backup unit 22 for supporting a printed board 21 uses an air cylinder 23 as a drive source, as shown in FIG. 3 (b). The printed board 21 was moved up and down with a constant stroke A. Further, the suction nozzle 26 of the mounting head 25 that suctions the odd-shaped component 24 by vacuum pressure.
4A, when suctioning the odd-shaped component 24, as shown in FIG. 4A, it operates based on a constant stroke B preset by an elevating means (not shown). The mounting pressure at the time of mounting on the upper part is variable depending on the pressing amount of the compression coil spring 27 provided in the suction nozzle 26.

Further, an XY for transporting the mounting head 25.
The slider 28 moves the mounting head 25 via a ball screw 30 using a servo motor 29 as a drive source.

[0004]

According to the prior art, the backup unit 22 on which the printed board 21 is placed.
Is driven by the air cylinder 23, so that it can operate only a constant stroke A. Therefore, when the thickness of the printed board changes, it is necessary to replace the backup pin 33 protruding from the backup plate 32. Further, since the delicate speed control cannot be performed on the backup unit 22, when the backup is released after the components are mounted, the mounted components are displaced due to the impact force at the time of the release.

When the mounting head 25 sucks the odd-shaped component 24, the odd-shaped component 24 is placed in the component supply unit 36 such as a pallet because the stroke B of the suction nozzle 26 is a preset specified value. Since it cannot be detected when there is a change in the current state, Fig. 4 (b)
When the deformed component 24 is at a high position as shown in FIG. 4, the suction nozzle 26 presses the deformed component 24 to cause a crack 37, which destroys the deformed component 24. Further, as shown in FIG. When the component 24 was sunk, the suction nozzle 26 did not reach and could not be sucked.

Further, the mounting pressure is changed by using the reaction force of the compression coil spring 27 depending on the pushing amount of the suction nozzle 26, but the variable range is limited. Therefore, in FIG.
It was not possible to mount the odd-shaped component 34 with the insertion pin provided with the insertion pin 35 that requires the insertion force shown in FIG.

Further, an XY transporting the mounting head 25
The slider 28 is mounted on the mounting head 2 via the ball screw 30.
Since No. 5 is moved, expansion and contraction due to temperature change of the ball screw and backlash due to wear and the like occur, resulting in deterioration of component mounting accuracy.

Therefore, an object of the present invention is to solve the above-mentioned problems in the prior art and to provide a highly accurate and highly reliable odd-shaped component mounting machine.

[0009]

SUMMARY OF THE INVENTION A variant component mounting machine according to the present invention comprises a component supply means for placing a variant component, a backup means for supporting a printed board on which the variant component is mounted with a variable backup height, and Suction nozzle means capable of varying the mounting pressure when a deformed component placed on the component supply means is suctioned by vacuum pressure and mounted on the printed board backed up by the backup means, and this suction nozzle Mounting head means for supporting the means so as to be movable up and down, conveying means for moving the mounting head means, and moving the suction nozzle means between the component supply means and a predetermined position on the printed board, and the mounting head. Means for measuring the suction surface height of the odd-shaped component provided in the means, and the suction nozzle based on the suction surface height measured by the measurement means. Characterized by comprising a control means for controlling the lifting amount of the stage.

[0010]

In the modified component mounting machine of the present invention, when the modified component is to be mounted on the printed board, first, the height of the suction surface of the modified component is measured by the measuring means, and the mounting head is based on the measured value. The suction nozzle means is lowered by the means to suck the odd-shaped component placed on the component supply means.

Next, the mounting head unit is transported by the transport unit and positioned so that the odd-shaped component sucked by the suction nozzle unit is placed on the mounting position of the printed board supported by the backup unit.

Next, the suction nozzle means is lowered by the mounting head means to bring the odd-shaped component into contact with the mounting surface of the printed board, and the odd-shaped component is mounted on the printed board by the backup operation of the backup means. At the same time, the odd-shaped component is released from the suction by the suction nozzle means.

[0013]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

1 (a), 1 (b), 1 (c) and FIG. 2 show the configuration of a variant component mounting machine according to an embodiment of the present invention.

As shown in FIG. 1 (a), the odd-shaped component mounting machine serves as suction nozzle means for sucking the irregular-shaped component 1 mounted on the component supply unit 19 as the component supply means and mounting it on the printed board 14. Suction nozzle section 20, a mounting head section 12 as a mounting head section for supporting the suction nozzle section 20 so as to be able to move up and down, an XY slider 13 as a conveying section for conveying the mounting head section 12, and a printed board. 1
4 is provided with a backup unit 15 as a backup means for supporting the backup height variable and a control unit 40 (see FIG. 2) as a control means for controlling the operation of the entire mounting machine.

As shown in FIG. 1 (b), the suction nozzle portion 20 has a cylindrical nozzle shaft 3 having a pressure guiding hole 3b communicating with a cylinder 3a formed in the lower portion opened at the top, and the nozzle shaft 3 Of the suction nozzle 2 in which the lower end of the cylinder is slidably fitted in the cylinder 3a of the cylinder and the lower end of the cylinder is formed in the small diameter portion 2a, and an intake hole 2b is formed from the side surface of the middle portion of the cylinder to the tip of the small diameter portion 2a. And a support container 4 in which the nozzle shaft 3 is vertically fitted and held so that the small diameter portion 2a of the suction nozzle 2 is drawn out through a hole in the bottom surface of the bottomed cylindrical body, and a pressure guide hole 3b is provided at the top of the nozzle shaft 3. An electropneumatic regulator 7 which is connected to a cylinder 3a through a pressure joint 6 to vary the pressure of the pressurized air supplied to the cylinder 3a, and a nozzle shaft 3 and a support container at an intake hole 2b opened on the side surface of the cylindrical body of the adsorption nozzle 2. Each side of 4 And configured by comprising a vacuum generator 5 supplies a vacuum pressure connected by piping to the suction nozzle 2 to the supply joint 5a installed in the supporting case 4 side in communication.

The mounting head 12 is attached to a nut 9a which is screwed onto a ball screw 9 driven by a servomotor 10 and which is raised and lowered by the rotation of the ball screw.
By supporting the support container 4 with the suction nozzle unit 20
Is supported so that it can be raised and lowered. Further, the mounting head unit 12 is provided with a measuring device 11 as a measuring unit that measures the height of the suction surface 1a of the odd-shaped component 1 placed on the component supply unit 19.

The XY slider 13 includes a mounting head portion 12.
And is driven by the linear motor 13a to convey the mounting head unit 12 in the X and Y directions on the horizontal plane.

The backup unit 15 is shown in FIG.
As shown in (a) and (c), a backup pin 16a that supports the printed board 14, a backup plate 16b in which the backup pin 16a is implanted, and a backup plate 1
Ball screw 17 for raising and lowering 6b and motor 1 as a drive source
8 and the backup height can be changed according to the thickness of the printed board 14.

The control unit 40 includes a CPU for performing arithmetic processing,
A ROM that stores a control program and a RAM that temporarily stores calculation data, measurement data, control data, and the like are built in, and as shown in FIG. 2, a linear motor 13a of an XY slider 13, an electropneumatic regulator 7, a vacuum, and the like. Generator 5,
Signals are transmitted to and received from the measuring instrument 11, the servo motor 10 of the mounting head unit 12, and the motor 18 of the backup unit 15, and the operation is controlled based on a control program.

In the modified component mounting machine of the embodiment of the present invention constructed as described above, when the modified component 1 on the component supply unit 19 is to be mounted on the printed board 14, X-
The mounting head portion 12 is moved by the Y slider 13 to position the suction nozzle 2 on the odd-shaped component 1 to be suctioned.

Next, the measuring device 11 measures the relative distance (height of suction surface) of the odd-shaped component 1 to the suction surface 1a. Based on this measured value, the servo motor 10 and the ball screw 9 lower the suction nozzle 2 together with the nozzle shaft 3,
The vacuum shaft attracts the odd-shaped component 1, and the nozzle shaft 3
To the original height.

Next, the mounting head portion 12 is moved by the XY slider 13 to align the attracted odd-shaped component 1 with the portion to be mounted on the printed board 14 on the backup unit 15.

Next, the pressurized air adjusted by the electropneumatic regulator 7 so that the mounting pressure corresponding to the odd-shaped component is applied to the cylinder 3a of the nozzle shaft 3, and this air pressure is applied to the upper end of the cylindrical body of the suction nozzle 2. To be applied as back pressure to.

Next, the ball screw 9 of the mounting head portion 12 is rotated by the servomotor 10, and the suction nozzle 2 is held until the odd-shaped component 1 comes into contact with the printed board 14 supported on the backup pin 16a of the backup unit 15.
Is lowered together with the nozzle shaft 3, and the odd-shaped component 1 is mounted on the printed board 14 by the backup operation by the backup unit 15. As for the mounting pressure at this time, the set desired value is secured by the pressure adjusting action of the electropneumatic regulator 7.

The measuring machine 1 provided on the mounting head 12
It is also possible to use 1 to measure the distance (mounting surface height) from the mounting surface of the printed board 14 prior to mounting, whereby the suction nozzle 2 descends by an appropriate amount based on the measured value. Since it is controlled as described above, it is possible to eliminate the impact given to the odd-shaped component 1 and the printed board 14 when the components are mounted.

According to the odd-shape component mounting machine of the embodiment of the present invention, since the accurate distance between the odd-shape component 1 to be sucked and the suction nozzle 2 is detected before the suction, the odd-shape component 1 due to the collision of the suction nozzle is detected. It is possible to solve the problems such as the damage of No. 1, the suction nozzle cannot reach the odd-shaped component 1, and the suction cannot be performed. Further, by using the electropneumatic regulator 7, it becomes possible to change the mounting pressure of the suction nozzle 2 to an appropriate value according to the type of the odd-shaped component 1. Also, printed board 1
In the backup of No. 4, since the backup unit 15 is driven by a motor, the backup amount can be changed according to the thickness of the printed board 14, and the backup pin 16a need not be replaced, while controlling the speed. Since the backup is performed, no impact force is applied to the printed board 14. Therefore, it is possible to prevent displacement of the mounted odd-shaped component. Further, the XY slider 13 was able to solve the problem of deterioration in component mounting accuracy due to temperature change and wear by using a linear motor as a drive source.

[0028]

As described above in detail, according to the present invention, the mounting head means having the vertical movement mechanism of the suction nozzle means is provided with the measuring means to detect the accurate distance between the odd-shaped component and the suction nozzle. Since the suction is performed after the suction, the odd-shaped component is damaged due to the collision of the suction nozzle, and the problem that the suction nozzle cannot reach the odd-shaped component and the suction cannot be performed can be solved. Also, by using an electro-pneumatic regulator and changing the air pressure applied to the suction nozzle as back pressure from this regulator, the mounting pressure of the suction nozzle can be changed to an appropriate value according to the type of odd-shaped parts. Became.

Further, in the backup of the printed board, since the backup means is driven by the motor, the rising amount of the backup can be varied according to the board thickness of the printed board, the backup pin need not be replaced, and the speed can be controlled. As it backs up, the printed board is not impacted. Therefore, it is possible to prevent displacement of the mounted odd-shaped component. Further, by using a linear motor as a drive source, the conveying means can solve the problem of deterioration in component mounting accuracy due to temperature change and wear.

[Brief description of drawings]

FIG. 1 shows the configuration of a modified component mounting machine according to an embodiment of the present invention, and FIG. 1 (a) is an elevational view showing the whole.
1B is a configuration diagram of the mounting head in FIG. 1A, and FIG. 1C is a detailed diagram of the backup unit in FIG. 1A.

FIG. 2 is a block diagram showing a configuration of a control unit.

FIG. 3 shows a configuration of a conventional odd-shape component mounting machine, FIG. 3 (a) is an elevational view showing the whole, and FIG. 3 (b) is FIG.
It is a detailed view of the backup unit in (a).

FIG. 4 shows the suction nozzle in FIG. 3 (a),
FIG. 4A is a cross-sectional view showing the configuration, FIG. 4B is an explanatory view showing a state where the deformed component is in a high position and pressed, and FIG. 4C is a deformed component in a low position. It is explanatory drawing which shows the state which can not be adsorbed.

FIG. 5 is an explanatory diagram showing a deformed component that needs to be press-fitted into a printed board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Deformed part 2 ... Suction nozzle 2a ... Small diameter part 2b ... Intake hole 3 ... Nozzle shaft 3a ... Cylinder 3b ... Pressure guide hole 4 ... Support container 5 ... Vacuum generator 6 ... Pressurizing joint 7 ... Electropneumatic regulator 8 ... Lever 9 ... Ball screw 10 ... Servo motor 11 ... Measuring instrument 12 ... Mounting head portion 13 ... XY slider 13a ... Linear motor 14 ... Printed board 15 ... Backup unit 16a ... Backup pin 16b ... Backup plate 17 ... Ball screw 18 ... Motor 19 ... Parts supply unit 20 ... Suction nozzle unit 40 ... Control unit

Claims (5)

[Claims] 1. A component supply means for mounting a deformed component, a backup means for supporting a printed board on which the deformed component is mounted with a variable backup height, and a vacuum for the deformed component mounted on the component supply means. Suction nozzle means capable of varying the mounting pressure when mounted on a printed board which is sucked by pressure and backed up by the backup means, and a mounting head means for supporting the suction nozzle means so as to be vertically movable; Move the mounting head means,
Conveying means for moving the suction nozzle means between the component supply means and a predetermined position on the printed board, a measuring means provided in the mounting head means for measuring the suction surface height of the odd-shaped component, and the measuring means. And a control means for controlling the ascending / descending amount of the suction nozzle means based on the suction surface height measured by the means. 2. The mounting of the odd-shaped component according to claim 1, wherein the backup means is configured to support the printed board through a backup pin by a backup plate that is moved up and down by a ball screw driven by a motor. Machine. 3. The adsorption nozzle means is connected to an electropneumatic regulator connected to a nozzle shaft which fits and guides the adsorption nozzle, and the air pressure applied as a back pressure from the regulator to the adsorption nozzle is varied to make the adsorption nozzle component. The odd-shaped component mounting machine according to claim 1, wherein the mounting pressure is variable. 4. The odd-shaped component mounting machine according to claim 1, wherein the control means controls the up-and-down amount of the suction-nozzle device so that the suction-nozzle device suctions the odd-shaped component without impact. 5. The odd-shaped component mounting machine according to claim 1, wherein the conveying means uses a linear motor as a drive source.