JPH0464286A - Automatic component mounting machine - Google Patents

Abstract

PURPOSE:To grasp the operating state of a machine by providing a maintenance warning unit, and judging proper or improper of a gain regulation of a servo system in each driver and proper or improper of a component inserting state. CONSTITUTION:A force applied to a clinching pawl is converted to a voltage by a component insertion detecting sensor 11 mounted at the pawl, and input to a maintenance warning unit 8 through a high frequency cut filter 12 and an amplifier 13. The input insertion detection signal is converted to a predetermined signal (frequency or digital value) through an S/P converter 14 and a V/F (or A/D) converter 15, and then input to a CPU 16. The CPU 16 compares a component insertion detection signal level with a preset pattern, judges the disconnection and the bending state of leads of an electronic component, and outputs its result to a controller 9. If the signal level is low, an improper insertion is judged.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic electronic component 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 explained with reference to FIGS. 4 to 6.

As shown in FIG. 4, this electronic component automatic mounting machine mainly includes a component supply section 31, a component supply section drive device 32, and an
-Y table section 33 and X-Y table section drive device 34
, a component insertion detection device 35 , and a control section 36 that controls the component supply section drive device 32 , the XY table section drive device 34 , and the component insertion detection device 35 . Although not shown, an insertion head section, an anvil section, etc. for inserting other components are also provided. and,
Further, the component insertion detection device 35 includes a component insertion detection sensor 41, a high frequency cut filter circuit that removes a high frequency component of the component insertion detection signal from the component insertion detection sensor 41, and a filter circuit that includes an amplifier that amplifies the output signal. 42, a comparator 43 for comparing the output signal from the filter section 42 with a predetermined set value, a waveform shaping circuit for shaping the waveform of the output signal from the comparator 43, and its output circuit. 4
It is composed of 4.

Next, the anvil portion for mounting components will be explained based on FIG.

That is, this anvil portion 51 includes an anvil body 52 and a clinch table 53 disposed above the anvil body 52.
and a pair of clinch claws 54, and the component insertion detection sensor 41 is attached to the back surface of each of these clinch claws 54.

The operation of the above configuration will be explained based on FIG. 6.

As shown in FIGS. 6(a) to (C), when the electronic component is inserted into the printed circuit board A, the clinch table 53 is moved by air pressure, and the lead of the electronic component B is moved between the clinch table 53 and the electronic component B. Cut and bend line C. During this cutting and bending, the force applied to the clinch claws 54 is converted into a weak electrical signal by the component insertion detection sensor 41. Then, this electric signal is subjected to removal of high frequency components and amplification by the filter part 42. Next, the comparator 43
The signal input from the filter part 42 and a preset setting value are compared, and if the input signal is equal to or greater than the setting value,
It is determined that the insertion of the electronic component is normal, and a signal is output to the next waveform shaping section 44. On the other hand, if the input signal is smaller than the set value, it is determined that the electronic component is not inserted normally, and no signal is output to the waveform shaping section 44. In the waveform shaping section 44, the comparator 4
3 is converted into a pulse having a magnitude and time width that can be received by the control unit 36, and is output to the control unit 36. The insertion of the electronic component is detected in this way, and if the insertion is performed normally, the control unit 36
Control signals are output to each part to prepare for insertion of the next electronic component.

Note that here, the component supply section 31 and the X-Y table section 3
The drive control of No. 3 will be explained. First, the parts supply section 31
Regarding drive control, a speed command is output as a voltage value from the control section 36 to the component supply device drive device 32 for positioning control, and this component supply device drive device 32 drives a servo motor to control the component supply section 31. Activate. Note that the operating state is 1, and the output of the tachogenerator or the output of the encoder is fed back to the control unit 36 by the servo motor of the component feeder drive device 32. Also, X-
The drive control of the Y table section 33 is also the same as that of the component feeder drive device 32 described above. Note that the purpose of the control unit 36 is positioning control, and does not monitor whether the adjustment state of each drive device 32, 34 is appropriate.

Problems to be Solved by the Invention According to the above-mentioned conventional configuration, even if the clinch claw 54 in the component insertion portion is worn out and the lead wire C is not cut stably, it cannot be detected while the machine is in operation. Therefore, parts insertion errors occur frequently, the number of machine stops increases, and in many cases, an operator notices wear of the clinch claw 54 for the first time through visual inspection, and then replaces the clinch claw 54. Therefore, when one machine is stopped to replace the clinch claw 54, other machines on the line with that machine are also stopped, resulting in a problem that the operating rate of the entire equipment is reduced. Ta.

Furthermore, depending on the mounting condition and adjustment condition of the clinch claw 54, there is a problem in that even if the lead wire C is not actually cut, the signal level from the component insertion detection sensor 41 increases, leading to incorrect judgment of component insertion. Ta.

In addition, there was a desire to understand the condition of clinch claws in advance when replacing or adjusting them, as it was necessary to increase the operating rate of the machine.

Furthermore, the adjustment of the component feeder drive device and the X-Y table drive device may become erroneous due to load fluctuations or changes over time.
Machines sometimes stop during operation, so there was a desire to monitor the operating status of each drive device and identify any maladjustments in advance.

SUMMARY OF THE INVENTION In order to solve the above problems, an electronic component automatic mounting machine of the present invention includes a component supply section, a drive device for the component supply section, and an X-Y table section. , an automatic component mounting machine having a drive device for the X-Y table section, a component insertion detection device for detecting insertion of a component, and a control section for controlling each of these drive devices, the component supply section drive device The operating signals from the X-Y table driving device are inputted to determine whether or not the gain adjustment of the servo system in each of the driving devices is appropriate, and the detection signal from the component insertion detection device is inputted in advance. The apparatus is equipped with a maintenance warning device having an arithmetic processing section that determines whether the inserted state of the component is appropriate or inappropriate by comparing it with the set value and outputs the results of these judgments to the control section.

Effects According to the above configuration, the operation signal from the component insertion detection device is input to the arithmetic processing section, where it is compared with a preset value to determine whether the insertion state of the component is appropriate or inappropriate.

Further, operation signals from the component supply section drive device and the X-Y table section drive device are input to the arithmetic processing section, and it is determined whether the gain adjustment of each drive servo system is appropriate or not.

EXAMPLE Hereinafter, an example of the present invention will be explained based on FIGS. 1 to 3.

In FIG. 2, reference numeral 1 denotes an electronic component automatic mounting machine, which includes a component supply section 2, an insertion head section 3, an anvil section 4, an x-y table section 5, a component supply section drive device 6, and an X-Y It is composed of a table section drive device 7, a drive device (not shown) for the insertion head section, anvil section, etc., a maintenance warning device 8, and a control section 9 that controls the entire machine, that is, the above-mentioned respective drive devices.

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

That is, in FIG. 1, a component insertion detection device 10, a component supply section drive device 6, and an X-Y table section drive device 7
The maintenance warning device 8 is provided between the controller 9 and the controller 9.

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

Further, the maintenance warning device 8 includes the sp converter 1
4, a V/F or A/D conversion section 15, and a CPU section (arithmetic processing section) 16.

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

First, based on the NC program positioning information and parts information stored inside the control section 9, the X-Y table section 5
and component supply section 2 are driven by respective drive devices 7 and 6 and positioned at predetermined locations. When positioning is completed, the electronic component is picked up from the component supply section 2 by the insertion head section 3 according to a command from the control section 9, and inserted into a predetermined position on the printed circuit board placed on the table of the x-y table section 5. be done. When the component is inserted, the clinch claw of the anvil portion 4 is driven by air force, and the lead wire of the electronic component is cut, bent, and fixed to the printed circuit board.

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

The insertion detection signal input to this maintenance warning device 8 is sent to the sp converter 14 and V/F (or A/D).
After being converted into a predetermined signal (frequency or digital value) by the conversion unit 15, the signal is input to the CPU unit 16. This CPU
In the section 16, the component insertion detection signal level is compared with a preset pattern to determine whether the lead wire of the electronic component is cut or bent, and the result is output to the control section 9. If the signal level is low, it is determined that the insertion is defective. Furthermore, the clinch claw of the anvil portion 4 is worn out and the cutting condition worsens (then the force applied to the component insertion detection sensor 11 increases, so the signal level from the component insertion detection sensor 11 increases. The maintenance warning device 8 compares the increase in the component insertion detection signal level with the cumulative number of insertion points since the time of clinch claw replacement, and outputs a clinch claw replacement warning to the control unit 9.

Next, during adjustment, the installation of the clinch claws is performed by measuring the detection signal level without cutting or bending the lead wire of the electronic component and comparing it with the setting level programmed in advance in the CPU section 16. The appropriateness or unsuitability of the condition is determined. If the detection signal level is high, this means that the clinch table or the printed circuit board is in contact, and therefore a warning is output to the control unit 9 that the adjustment of the mounting is inappropriate.

In addition, regarding the adjustment status of the component supply section drive device 6 and the X-Y table section drive device 7, the speed waveform of the servo motor in each drive device is analyzed, and overshoot, undershoot, and delay in the rise characteristic are determined. Then, a warning as to whether the gain adjustment of the servo system is appropriate or not is output to the control unit 9.

In addition, when the operation signal from each drive device is a voltage value of the tachogenerator of a servo motor, it is input into the V/F or A/D conversion part 15 via the SP conversion part 14. When the operation signal from each drive device is an encoder output of a servo motor, it is a pulse signal and is input directly to the CPU section 16 from the S-P conversion section 4.

Furthermore, by measuring the operating time of each servo motor, an appropriate maintenance warning can be output.

Note that FIG. 1 shows a flowchart of determination in maintenance warning.

Effects of the Invention As described above, according to the configuration of the present invention, the operation signal from the component supply section drive device and the operation signal from the X-Y table section drive device are respectively inputted to control the servo system in each of the drive devices. It inputs the appropriateness/inappropriateness of the gain adjustment and the detection signal from the above component insertion detection device, and compares it with a preset setting value to determine the appropriateness/inappropriateness of the insertion state of the component. Equipped with a maintenance warning device that has an arithmetic processing section that outputs output to the control section, it is easy to determine when to replace the component insertion section and the installation state of the component insertion section, as well as the adjustment state of the drive device. Therefore, maintainability and availability can be improved.

[Brief explanation of drawings]

Figures 1 to 3 show one embodiment of the present invention.
The figure is a block diagram showing the control system of the driving device of the main part in the component mounter, Figure 2 is a partially cutaway overall perspective view of the automatic component mounter, Figure 3 is a flowchart showing the judgment procedure in the maintenance warning device, 4 to 6 show a conventional example. FIG. 4 is a block diagram showing the control system of the main drive device, FIG. 5 is an external perspective view of the anvil, and FIGS. 6(a) to ( C) is a sectional view of a main part showing an operation of inserting an electronic component. 1...Electronic component mounting machine, 2...Component supply section, 3
...Insertion head part, 4...Anvil part, 5...
...X-Y table unit, 6...Component supply unit drive device, 7...X-Y table unit drive 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...S-P conversion section, 15...
V/F or A/D conversion section, 16...CPU section.

Claims (1)

[Claims] 1. A parts supply section, a drive device for this parts supply section,
a Y table section, a drive device for this X-Y table section,
An automatic component mounting machine having a component insertion detection device for detecting insertion of a component, and a control section for controlling each of these drive devices, the component supply section drive device and the X-Y table drive device being operable by the component supply section drive device and the X-Y table section drive device. Input each signal to determine whether or not the servo system gain adjustment is appropriate for each of the above drive devices.
It also inputs the detection signal from the component insertion detection device and compares it with a preset setting value to determine whether the insertion state of the component is appropriate or not, and outputs these determination results to the control section. An automatic component mounting machine characterized by being equipped with a maintenance warning device having an arithmetic processing section.