JP3068632B2 - Automatic component mounting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electronic component automatic mounting machine for automatically mounting electronic components on a printed circuit board.

2. Description of the Related Art A conventional electronic component automatic mounting machine will be described with reference to FIGS.

As shown in FIG. 4, this electronic component automatic mounting machine includes:
Mainly, a component supply unit 31, a component supply unit driving device 32, an XY table unit 33, an XY table unit driving device 34, a component insertion detection device 35, the component supply unit driving device 32, It comprises an XY table drive 34 and a controller 36 for controlling the component insertion detector 35. Although not shown, an insertion head portion for inserting components, an anvil portion, and the like are provided. Further, the component insertion detection device 35 has a component insertion detection sensor 41, a high frequency cut filter circuit for removing a high frequency component of the component insertion detection signal from the component insertion detection sensor 41, and an amplifier for amplifying the output signal thereof. A waveform forming section having a filter section, a comparator 43 for comparing an output signal from the filter section with a predetermined set value, a waveform shaping circuit for shaping a waveform of an output signal from the comparator 43, and an output circuit thereof It is composed of 44.

Next, the anvil part for mounting components will be described with reference to FIG.

In other words, the anvil part 51 includes an anvil body 52,
It comprises a clinch table 53 and a pair of clinch claws 54 arranged on the upper part of the anvil main body 52, and the component insertion detection sensor 41 is attached to the back of each clinch claw 54.

 The operation of the above configuration will be described with reference to FIG.

As shown in FIGS. 6 (a) to 6 (c), when the electronic component is inserted into the printed circuit board A, the clinch table 53 moves by the pressure of the air, and leads the electronic component B between the clinch table 53 and the clinch table 53. Cut and bend the line C. The force applied to the clinch claw 54 during this cutting / bending is the component insertion detection sensor.
It is converted into a weak electric signal by 41. Then, the electric signal is subjected to removal and amplification of the high frequency component in the filter unit 42. Next, in the comparator 43, the signal input from the filter unit 42 and a preset set value are compared. A signal is output to the next waveform shaping unit 44. On the other hand, when the input signal is smaller than the set value, it is determined that the insertion of the electronic component is not performed normally, and no signal is output to the waveform shaping unit 44. In the waveform shaping section 44, the signal from the comparator 43 is
Is converted into a pulse having a receivable magnitude and time width, and is output to the control unit 36. Thus, the insertion of the electronic component is detected, and when the insertion is performed normally, the control unit 36 outputs a control signal to each unit so as to prepare for the insertion of the next electronic component.

Here, the component supply unit 31 and the XY table unit 33
Will be described. First, regarding the drive control of the component supply unit 31, a speed command is output as a voltage value to the component supply unit drive unit 32 for positioning control from the control unit 36, and the component supply unit drive unit 32 drives a servo motor. Then, the component supply unit 31 is operated. The operation state is transmitted to the control unit 36 by the servo motor of the component supply unit driving device 32.
The output of the tachogenerator or the output of the encoder is fed back. The drive control of the XY table section 33 is the same as that of the component supply section drive device 32. Note that the purpose of the control unit 36 is positioning control, and monitoring of the suitability of the adjustment state of each of the driving devices 32 and 34 is not performed.

According to the above-described conventional configuration, even when the clinch claw 54 is worn and the cutting of the lead wire C is unstable in the component insertion portion, it is possible to find out while the machine is operating. Therefore, the number of stoppages of the machine increases due to frequent component insertion failures, and the operator often notices the wear of the clinch claw 54 for the first time and replaces the clinch claw 54 in many cases. For this reason, the stoppage of one machine for replacing the clinch claw 54 also stops other machines that are lined with that machine, which causes a problem that the operation rate of the entire equipment is reduced. Was.

Further, depending on the mounting state and the adjustment state of the clinch claw 54, the signal level from the component insertion detection sensor 41 increases even if the lead wire C is not actually cut. Was.

In addition, there is a demand for grasping the state of the clinch claw replacement adjustment in advance due to the necessity of increasing the operation rate of the machine.

Further, the adjustment of the component supply unit drive unit and the XY table unit drive unit may be out of order due to load fluctuation or aging, and the machine may stop during operation. Therefore, the operation state of each drive unit is monitored. Therefore, there was also a demand for grasping the improper adjustment in advance.

Then, an object of the present invention is to provide an electronic component automatic mounting machine which can solve the above-mentioned subject.

Means for Solving the Problems In order to solve the above problems, an electronic component automatic mounting machine according to the present invention comprises: a component supply unit;
A component automatic mounting machine having a -Y table unit, a driving device for the XY table unit, a component insertion detecting device for detecting insertion of a component, and a control unit for controlling each of these driving devices. Part supply unit driving device and XY
The operation signals from the table drive unit are input, and the appropriateness / inappropriateness of the gain adjustment of the servo system in each of the drive units, and the detection signal from the component insertion detection unit are input, and a preset set value is input. And a maintenance warning device having an arithmetic processing unit for determining whether or not the inserted state of the component is appropriate or not and outputting the result of the determination to the control unit.

Operation According to the above configuration, the operation signal from the component insertion detection device is input to the arithmetic processing unit, where it is compared with a preset value to determine whether the component is inserted properly or not. Also, operation signals from the component supply unit drive unit and the XY table unit drive unit are input to the arithmetic processing unit, and it is determined whether the gain adjustment of each drive servo system is appropriate or not.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 2, reference numeral 1 denotes an electronic component automatic mounting machine, which is a component supply unit 2, an insertion head unit 3, an anvil unit 4, an XY
A table unit 5, a component supply unit drive unit 6, an XY table unit drive unit 7, a drive unit (not shown) such as an insertion head unit / anvil unit, a maintenance warning unit 8,
The control unit 9 controls the entire machine, that is, the above-mentioned respective driving devices.

By the way, the gist of the present invention is that the maintenance warning device 8 is provided in the control system of the machine. Therefore, in this embodiment, the control system will be described, and the description of the other components will be omitted.

That is, in FIG. 1, the component insertion detection device 10, the component supply portion driving device 6, and the XY table portion driving device 7
And the control unit 9, the maintenance warning device 8 is provided.

The component insertion detection device 10 includes a component insertion detection sensor 11, a high frequency cut filter circuit 12, and an amplifier 13 attached to a clinch claw of the anvil unit 4.

Further, the maintenance warning device 8 includes an SP conversion unit.
14, V / F or A / D converter 15, CPU (arithmetic processor) 16
It is composed of

 Next, the operation in the above configuration will be described.

First, based on the NC program positioning information and the component information stored in the control unit 9, the XY table unit 5 is used.
And the component supply unit 2 are driven by the respective driving devices 7 and 6 and positioned at predetermined positions. When the positioning is completed, the electronic component is picked up from the component supply unit 2 by the insertion head unit 3 according to a command from the control unit 9 and inserted into a predetermined position of the printed board arranged on the table of the XY table unit 5. Is done. When the components are inserted, the clinch claws of the anvil portion 4 are driven by the force of air, and the lead wires of the electronic components are cut and bent, and are fixed to the printed circuit board.

At this time, the force applied to the clinch claw is converted into a voltage by the component insertion detection sensor 11 attached to the clinch claw. The output signal from the component insertion detection sensor 11 is supplied to the high-frequency cut filter circuit 12 and the amplifier 13
Is input to the maintenance warning device 8 via the.

The insertion detection signal input to the maintenance warning device 8 is supplied to an SP conversion unit 14 and a V / F (or A / D) conversion unit 15.
After being converted into a predetermined signal (frequency or digital value) by the, it is input to the CPU unit 16. The CPU section 16 compares the component insertion detection signal level with a preset pattern to determine the cutting and bending state of the lead wire of the electronic component, and outputs the result to the control section 9. If the signal level is low, it is determined that the insertion is defective. Also,
When the clinch claw of the anvil part 4 wears and the cutting state deteriorates, the force applied to the component insertion detection sensor 11 increases, and the signal level from the component insertion detection sensor 11 increases. Thus, the maintenance warning device 8 compares the increase in the component insertion detection signal level with the cumulative number of insertion points since the clinch claw replacement, and outputs a clinch claw replacement warning to the control unit 9.

Next, at the time of adjusting the mounting of the clinch claw, the detection signal level of a state in which the lead wire of the electronic component is not cut or bent is measured and compared with a preset level programmed in the CPU unit 16 to determine the mounting state. Is determined to be appropriate or inappropriate. If the detection signal level is high, it means that it is in contact with the clinch table or the printed circuit board, and a warning is output to the control unit 9 that the mounting adjustment is inappropriate.

As for the adjustment states of the component supply unit driving device 6 and the XY table unit driving device 7, the speed waveforms of the servo motors in the respective driving devices are analyzed to determine the overshoot, undershoot, and delay of the rising characteristic. Then, a warning of whether the gain adjustment of the servo system is appropriate or inappropriate is output to the control unit 9.

When the operation signal from each drive device is the voltage value of the tachogenerator of the servomotor, it is input to the V / F or A / D converter 15 via the SP converter 14. When the operation signal from each drive is the encoder output of the servo motor,
Because of the pulse signal, it is directly input from the SP converter 14 to the CPU 16.

Also, by measuring the operation time of each servomotor, it is possible to output an appropriate maintenance warning.

FIG. 3 shows a flowchart of the judgment in the maintenance warning.

As described above, according to the configuration of the present invention, the operation signal from the component supply unit driving device and the operation signal from the XY table unit driving device are input, and the servo system of each driving device is Whether the gain adjustment is appropriate or not, and the detection signal from the component insertion detection device is input, and the appropriateness or inappropriateness of the component insertion state is determined by comparing with a preset value, and the determination result is determined. Since the maintenance warning device having the arithmetic processing unit for outputting to the control unit is provided, it is possible to easily determine the replacement time of the component insertion unit and the attachment state of the component insertion unit, and also easily determine the adjustment state of the driving device. Therefore, maintainability and availability can be improved.

[Brief description of the drawings]

1 to 3 show one embodiment of the present invention.
FIG. 2 is a block diagram showing a control system of a driving device of a main part in the component mounter, FIG. 2 is a partially cutaway perspective view of the automatic component mounter, FIG. 4 to 6 show a conventional example, FIG. 4 is a block diagram showing a control system in a driving device of a main part, FIG. 5 is an external perspective view of an anvil part, and FIGS. 6 (a) to (a). FIG. 3C is a cross-sectional view of a main part showing an insertion operation of the electronic component. 1 ... electronic component mounting machine, 2 ... component supply section, 3 ... insertion head section 4 ... anvil section, 5 ... XY table section,
6 ... part supply unit driving device, 7 ... XY table unit driving device, 8 ... maintenance warning device, 9 ... control unit,
10: component insertion detection device, 11: component insertion detection sensor, 12: high frequency cut filter circuit, 13: amplifier, 14: SP converter, 15: V / F or A / D converter ,
16 CPU section.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H05K 13/00 H05K 13/04 H05K 13/08 B23P 21/00 305

Claims (1)

(57) [Claims] 1. A component supply unit, a drive unit for the component supply unit, an XY table unit, a drive unit for the XY table unit, a component insertion detection device for detecting insertion of a component, An automatic component mounting machine having a control unit for controlling each drive device, wherein the component supply unit drive device and the X-
The operation signal from the Y table section drive device is input, and the appropriateness / inappropriateness of the servo system gain adjustment in each of the drive devices and the detection signal from the component insertion detection device are input, and the preset setting is performed. A component automatic mounting machine characterized by comprising a maintenance warning device having an arithmetic processing unit for judging whether or not the insertion state of the component is proper or not by comparing the value with the value and outputting the judgment result to the control unit. .