JP2008244162A - Component mounting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To supply a sufficient power supply to a plurality of electric-motor-driven component supplying devices actually provided and to suppress a power consumption of the power supply circuit itself and others. <P>SOLUTION: An output voltage of a constant current circuit 20 when a constant current from the constant current circuit 20 is flown as a power supply of the electric-motor-driven component supplying device 85 by turning on a total load capacity calculation switch 53 is measured by a voltage measuring circuit 30. On the basis of the measured result, a variable power supply capacity of a variable power supply circuit 40 is set. After that, after the total load capacity calculation switch 53 is turned off, a switch 52 at the mounting operation is turned on to supply the power supply from the variable power supply circuit 40 to the electric-motor-driven component supplying device 85 which conducts the component mounting. A minimum electric power supply capacity is set to be able to suppress the power consumption of the power supply circuit itself. Further the lifetime of the electric power supply can be extended. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a component mounting apparatus that includes a plurality of electric component supply devices, sucks components supplied from these electric component supply devices, and mounts them on a board. The present invention relates to a component mounting apparatus that can supply sufficient power to an electronic component supply apparatus and suppress power consumption in the power supply circuit itself and the like.

  In recent component mounting apparatuses, an electric component supply device (hereinafter referred to as an electric type) equipped with a motor for changing the adsorption position of a component in order to accurately adsorb a small component such as “0402 component”. Called component supply equipment). This 0402 part is a common name for a part having a mounting dimension of 400 μm × 200 μm. In addition, about 100 (100 units) of such electric component supply devices are mounted and used in one component mounting apparatus.

  For this reason, the consumption amount of the total electric power of the electric component supply device becomes large and becomes about 1 kw, so that it is necessary to suppress the electric power to the minimum necessary. In addition, since the electric parts supply device uses a combination of 8mm, 16mm, 32mm ... 56mm width types depending on the size of the parts to be used, the number mounted on the feeder bank varies depending on the application and is different for each bank. Power consumption also changes.

  Here, in Patent Document 1, in order to reduce power consumption in the electronic component mounting machine, the power supply of the component supply device that has run out of components is shut off, but the control power supply of the component supply device is maintained. A technique related to a power supply control method executed in an electronic component mounter is disclosed.

Japanese Patent No. 3841585

  However, the conventional component mounting apparatus including Patent Document 1 is provided with a power source having a power capacity that can supply power consumption corresponding to the maximum number of mounted electric component supply devices mounted on the banks provided. Even if power is supplied to a load with the same power consumption, if the power capacity of the power supply circuit becomes larger than necessary, the power consumed by the power supply circuit itself increases, resulting in the entire component mounting apparatus. Power consumption increases.

  FIG. 5 is a block diagram showing the configuration of a conventional circuit for supplying power to these electric component supply devices in a component mounting apparatus including a plurality of electric component supply devices.

  The component mounting apparatus is provided with a plurality of banks of component supply apparatuses (hereinafter referred to as component supply apparatus bank 80). Each of these component supply device banks 80 has a plurality of electric component supply devices 85 for supplying components to be mounted on the board. In any of the component supply device banks 80, the electric component supply device 85 is supplied with power from the power supply circuit 70 for the electric component supply device.

  Actually, many irregular parts such as connectors and ICs (Integrated Circuits) are supplied by an electric part supply device suitable for the tray and the part size. Therefore, the number of electric component supply devices 85 to be used differs for each component mounting device, and the power consumption varies accordingly. Conventional component mounting apparatuses have a problem that wasteful power is consumed because power supply corresponding to the number of electric component supply apparatuses actually provided is not controlled.

  The present invention has been made to solve the above-described conventional problems, and while supplying sufficient power to a plurality of electric component supply devices that are actually provided, the power consumption in the power supply circuit itself and the like can be reduced. It is an object to provide a component mounting apparatus that can be suppressed.

  The present invention includes a plurality of electric component supply devices, and in the component mounting apparatus that picks up the components supplied from these electric component supply devices and mounts them on a board, these electric component supply devices are supplied during normal component mounting operation. A variable power supply circuit capable of changing or setting a power supply capacity for supplying power to the apparatus, and these electric parts for the variable power supply circuit during the normal component mounting operation. When calculating the total load capacity of the switch for mounting operation that turns on the power supply of the supply device and the electric component supply device that is actually provided, a predetermined current source for the power supply of these electric component supply devices A constant current circuit that supplies a constant current power source, a voltage measurement circuit that measures the output voltage of the constant current circuit, and the constant current circuit and the voltage measurement circuit when the total load capacity is calculated. The total load capacity calculation switch for turning on the power of these electric component supply devices, and when the component mounting operation is performed by turning on the power, first, the total load capacity calculation switch is turned on to measure the voltage. Perform voltage measurement by the circuit, calculate the total load capacity based on the measurement result, set the power capacity of the variable power circuit so that power can be supplied to the total load capacity, A power supply for controlling a series of power-on processes of turning on the mounting operation switch and supplying power from the variable power supply circuit to the electric component supply device for a normal component mounting operation. The above-described problems are solved by providing a control circuit.

  According to the present invention, by using a constant current circuit, before supplying power to the electric component supply device, the number of the mounted electric component supply devices is obtained, and the electric power supply circuit having the necessary and sufficient power capacity is electrically operated. Since power can be supplied to the component supply device, the power consumption is not increased because the power capacity is unnecessarily large, and the power consumption can be suppressed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a power source of a component mounting apparatus to which the present invention is applied. FIG. 2 is a circuit diagram showing the constant current circuit 20, the voltage measuring circuit 30, and the variable power supply circuit 40 of the present embodiment, and the power supply portion of the electric component supply device 85.

  First, as shown in FIG. 1, the component mounting apparatus of this embodiment includes a constant current circuit 20, a voltage measurement circuit 30, and a variable power supply circuit 40. The component supply device bank 80 and the electric component supply device 85 are the same as those shown in FIG.

  In the present embodiment, when the present invention is applied and a component mounting operation is performed by turning on the power, first, the total load capacity calculation switch 53 is turned on, and the electric motor is operated based on the voltage measurement result by the voltage measurement circuit 30. The total load capacity of the formula component supply device 85 is calculated, and the power capacity of the variable power circuit 40 is set so that power can be supplied to the total load capacity. Thereafter, the switch 52 is turned on during the mounting operation, and power is supplied from the variable power supply circuit 40 to the electric component supply device 85 for the normal component mounting operation. The series of power-on processing is controlled by the power control circuit 10.

  In this embodiment, the mounting operation time switch 52 turns on the power of the electric component supply device 85 for the variable power supply circuit 40 during the above-described normal component mounting operation. The total load capacity calculation switch 53 turns on the power of these electric component supply devices for the constant current circuit and the voltage measurement circuit during the above-described total load capacity calculation.

  Here, in the present embodiment, the variable power supply circuit 40, the mounting operation time switch 52, and the total load capacity calculation switch 53 are provided for each component supply device bank 80. One constant current circuit 20 and one voltage measurement circuit 30 are provided in the component mounting apparatus of this embodiment. A series of power-on processes using the constant current circuit 20 and the voltage measurement circuit 30 are sequentially performed for each component supply device bank 80 as described later with reference to the flowchart of FIG.

  Next, as shown in FIG. 2, the variable power supply circuit 40 includes a plurality of constant voltage power supply circuits 42, and a power supply selection switch 44 and a diode 46 provided for each constant voltage power supply circuit 42. The power source selection switch 44 is a semiconductor switch, and when it is turned on, power is supplied to the corresponding constant voltage power circuit 42, and the constant voltage power circuit 42 supplies power to the electric component supply device 85 side. become able to. The diode 46 is connected to the output of the power supply voltage of the constant voltage power supply circuit 42 that is not in operation because the power supply selection switch 44 is off, and from the output of the power supply voltage of the other constant voltage power supply circuit 42 that is operating. This is to prevent current from flowing in.

  The power selection switches 44 are individually turned on / off under the control of the power control circuit 10. The variable power supply circuit 40 is configured so that the power supply capacity of the entire variable power supply circuit 40, that is, an electric component included in the corresponding component supply device bank 80 during a normal component mounting operation, is turned on or off by each power selection switch 44. The power supply capacity that can be supplied for supplying power to the supply device 85 can be changed or set.

  The constant voltage power supply circuits 42 have the same power supply capacity. However, it is not limited to such a thing.

  For example, the power supply capacity of the constant voltage power supply circuit 42 having the smallest power supply capacity is set to the minimum power supply capacity that can be set in the constant voltage power supply circuit 42 and the minimum variable width. The other constant voltage power supply circuits 42 are larger than the minimum power supply capacity, for example, 2 times, 4 times, 10 times, 20 times, etc. The maximum power supply capacity of the variable power supply circuit 40 can be set.

  Next, the constant current circuit 20 includes a D / A converter 21 that can set an output voltage according to a signal output from the power supply control circuit 10, amplifiers 25 and 26, resistors 22 and 23, and a variable resistor 27. Yes. The amplifier 26 amplifies the voltage applied to the variable resistor 27 according to the magnitude of the output current of the amplifier 25. The amplifier 25 is supplied with a voltage having a magnitude obtained by subtracting the output of the amplifier 26 from the output of the D / A converter 21. Therefore, the output of the amplifier 25 does not depend on the magnitude of the load. Thus, a current having a magnitude proportional to the voltage output from the D / A converter 21 flows. Therefore, the constant current circuit 20 operates as a constant current circuit in which the magnitude of the current can be set by the power supply control circuit 10.

  Note that the variable resistor 27 may be a fixed resistor. The variable resistor 27 is for setting a range (current range) of the magnitude of the current of the power supplied from the constant current circuit 20 that can be set in the constant current circuit 20.

  The voltage measurement circuit 30 includes an amplifier 32 of a differential amplifier having a plus input and a minus input, and an A / D converter 34. The output of the amplifier 32 is connected to the negative input, and is a so-called voltage follower. The amplifier 32 is a high input impedance amplifier for preventing circuit interference when the output voltage of the constant current circuit 20 is measured by the A / D converter 34. The output voltage of the constant current circuit 20 is measured by the A / D converter 34. Further, the value of the output voltage of the constant current circuit 20 obtained by the measurement is input to the power supply control circuit 10.

  The capacitor 56 and the resistor 57 of the electric component supply device 85 are impedances in the power source of the internal circuit 58 of the electric component supply device 85.

  FIG. 3 is a flowchart showing the power-on process of the present embodiment.

  First, in FIG. 3, in step S102, bank power-on processing as shown in FIG.

  In step S104, it is determined whether or not the bank power-on process has been completed for all the component supply device banks 80. If it is determined that the bank power-on process has been completed, all the power-on processes in the flowchart of FIG. Alternatively, when it is determined that the processing has not been completed, there is a component supply device bank 80 for which bank power-on processing has not yet been performed. In this case, another component supply that has not been completed is again performed in step S102. Bank power-on processing of the device bank 80 is performed.

  As described above, the power-on process of the present embodiment performs the power-on process of the flowchart of FIG. 3 in order for all the component supply device banks 80.

  Next, FIG. 4 is a flowchart showing the bank power-on process performed in the power-on process of the present embodiment.

  The bank power-on process shown in FIG. 4 is called from the above-described step S102 and is a process for one component supply device bank 80 (hereinafter referred to as a specific target bank) to be specified. In the following description of each step in the flowchart, the component supply device bank 80, the mounting operation time switch 52, the total load capacity calculation switch 53, and the variable power supply circuit 40 relate to the specific target bank described above.

  In step S122, the power supply control circuit 10 turns on the total load capacity calculation switch 53. At this time, if the mounting operation switch 52 is on, the power supply control circuit 10 first turns it off and then turns on the total load capacity calculation switch 53.

  In step S124, as a constant current process, the power supply control circuit 10 determines the magnitude of the current flowing from the constant current circuit 20 to the power supply of the electric component supply device 85 to the D / A converter 21 of the constant current circuit 20. Set.

  Next, in step S <b> 126, the power supply control circuit 10 reads the output voltage of the constant current circuit 20 measured by the voltage measurement circuit 30 from the A / D converter 34.

  Here, in the corresponding component supply device bank 80, when the electric component supply device 85 is not attached at all, including the tray being attached, the impedance becomes infinite when viewed from the constant current circuit 20, The constant current circuit 20 is over the range. At this time, the voltage measured by the voltage measurement circuit 30 is the maximum voltage that can be output by the constant current circuit 20 and increases to near the power supply voltage supplied to the constant current circuit 20.

  Alternatively, the voltage measured by the voltage measurement circuit 30 when only one electric component supply device 85 is attached is assumed to be V1. Then, the voltage V measured by the voltage measurement circuit 30 when the n electric component supply devices 85 are attached is (V1 / n).

  In step S128, the power supply control circuit 10 compares the voltage measured by the voltage measurement circuit 30 with a predetermined set value. If the voltage is equal to or greater than the set value, the range is over and the process proceeds to step S132. If it is less than the set value, it is determined that the above range is not over, and the process proceeds to step S142.

  In step S132, it is assumed that the power supply control circuit 10 is over the range, and therefore the electric component supply device 85 is not attached at all, and the constant current circuit is connected to the D / A converter 21 of the constant current circuit 20. The magnitude of the current flowing from the power source 20 to the power source of the electric component supply device 85 is set to zero. As a result, the operation of the constant current circuit 20 is stopped by the power supply control circuit 10.

  In step S134, the power supply control circuit 10 turns off the total load capacity calculation switch 53. At this time, if the mounting operation switch 52 is on, the power supply control circuit 10 turns it off. The power supply control circuit 10 turns off the power supply selection switch 44 that is turned on in the variable power supply circuit 40 and stops the operation of all the constant voltage power supply circuits 42. After step S134, the process proceeds to “end”, the process of FIG. 4 is all terminated, and the process proceeds to step S102 of FIG.

  On the other hand, in step S142, the power supply control circuit 10 obtains the number n of the electric component supply devices 85 attached to the corresponding specific target bank. Since the voltage V1 is given in advance, the number n can be obtained from (V1 / V). Next, in step S <b> 144, the power supply control circuit 10 determines the constant voltage power supply circuit 42 to be used in the variable power supply circuit 40.

  In step S142, the power supply control circuit 10 may simply calculate the total load capacity of the electric component supply device 85. This total load capacity can also be obtained based on the voltage V measured by the voltage measurement circuit 30. Then, based on the total load capacity, the corresponding power supply circuit 42 is operated so as to operate the necessary constant voltage power supply circuit 42 of the constant voltage power supply circuit 42 while minimizing the power consumption of the variable power supply circuit 40 itself. The selection switch 44 may be turned on.

  Subsequently, in step S146, the power supply control circuit 10 causes the D / A converter 21 of the constant current circuit 20 to have zero current flowing from the constant current circuit 20 to the power supply of the electric component supply device 85. Set. Thereby, the constant current process stops.

  In step S148, the power supply control circuit 10 turns off the total load capacity calculation switch 53. In step S150, the power supply control circuit 10 turns on the switch 52 during the mounting operation. When the switch 52 is turned on during the mounting operation, power is supplied from the variable power supply circuit 40 to the electric component supply device 85, and the electric component supply device 85 can be used for the operation of the component mounting device. After step S150, the process proceeds to “END”.

  As described above, in this embodiment, a plurality of electric component supply devices 85 are organized into a plurality of component supply device banks 80, and for each bank, the variable power supply circuit 40, the mounting operation switch 52, and The total load capacity calculation switch 53 is provided. In addition, according to the present embodiment, the electric component actually mounted by the control by the power supply control circuit 10 or by using the constant current circuit 20 before supplying power to the electric component supply device 85. The overall power consumption of the supply device 85 is obtained for each bank, and the power is supplied to the electric component supply device 85 by using the variable power supply circuit 40 having a necessary and sufficient power supply capacity as a power supply circuit for each bank. it can. Therefore, since the power supply capacity is unnecessarily large, the power consumption of the power supply circuit itself does not increase, and the power consumption can be suppressed. Furthermore, the life of the power supply circuit can be extended.

The block diagram which shows the structure of the power supply of the component mounting apparatus with which this invention was applied A circuit diagram showing a constant current circuit, a voltage measuring circuit, and a variable power supply circuit of the above embodiment, and a power supply portion of an electric component supply device The flowchart which shows the power activation process of the said embodiment The flowchart which shows the bank power-on process performed in the power-on process of the said embodiment. The block diagram which shows the structure of the circuit which supplies power to these electric component supply apparatuses of the conventional component mounting apparatus provided with the several electric component supply apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Power source control circuit 20 ... Constant current circuit 21 ... D / A converter 22, 23, 57 ... Resistor 25, 26, 32 ... Amplifier 27 ... Variable resistor 30 ... Voltage measuring circuit 34 ... A / D converter 40 ... Variable power source circuit DESCRIPTION OF SYMBOLS 42 ... Constant voltage power supply circuit 44 ... Power supply selection switch 46 ... Diode 52 ... Switch at the time of mounting operation 53 ... Total load capacity calculation switch 56 ... Capacitor 58 ... Electric component supply device internal circuit 70 ... Power supply circuit for electric component supply device 80 ... Parts supply unit bank 85 ... Electric parts supply unit

Claims (1)

In a component mounting apparatus that includes a plurality of electric component supply devices, adsorbs components supplied from these electric component supply devices, and mounts them on a board.
A variable power supply circuit that can vary or set the power capacity that can be supplied to supply power to these electric component supply devices during normal component mounting operation;
A mounting operation time switch for turning on the power of the electric component supply device for the variable power supply circuit during the normal component mounting operation;
A constant current circuit for supplying a predetermined constant current power source as a constant current source to the power source of these electric component supply devices when calculating the total load capacity of the electric component supply device actually provided;
A voltage measuring circuit for measuring the output voltage of the constant current circuit;
At the time of calculating the total load capacity, a total load capacity calculation switch for turning on the power of these electric component supply devices for the constant current circuit and the voltage measurement circuit,
When the component mounting operation is performed after turning on the power, first, the total load capacity calculation switch is turned on, voltage measurement is performed by the voltage measurement circuit, and the total load capacity is calculated based on the measurement result. Then, the power supply capacity of the variable power supply circuit is set so that power can be supplied to the total load capacity, and then the switch is turned on during the mounting operation to change the variable power supply for a normal component mounting operation. A component mounting apparatus comprising: a power supply control circuit for controlling a series of power-on processes in which power is supplied from a power supply circuit to these electric component supply apparatuses.

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