JP4125450B2 - Electronic component mounting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a component mounting control unit that requests a desired electronic component based on mounting data created for each type of printed circuit board, and supplies the electronic component by pulling out the desired tray from the trays stored in multiple stages to the component extraction position. The present invention relates to an electronic component mounting apparatus that includes a component supply device that controls the component supply operation of the component supply device in response to a request from the control unit.
[0002]
[Prior art]
This kind of multi-stage tray has a component supply device called a multi-stage tray that pulls out a desired tray to a component take-out position and supplies an electronic component, and prints the electronic component supplied by the component supply device. An electronic component mounting apparatus for mounting on a substrate is disclosed in, for example, Japanese Patent Laid-Open No. 10-242698.
[0003]
In such an electronic component mounting apparatus, as shown in the flowchart of FIG. 8, a component request is made from the main body side to the tray unit controller, and the electronic component supply operation of the component supply device is performed.
[0004]
That is, data for mounting electronic components mounted on a tray housed in a component supply apparatus is extracted from mounting data for designating which kind of product is mounted on which board on which board as shown in FIG. As shown in FIG. 7, a tray request management list is created in the preparation request table and stored in the control unit in the apparatus. The execution identification column of this list is initialized by the control unit at the timing of loading the printed circuit board. Further, the control unit checks the execution identification column in the order of the young number in the list, and requests the type of the step (number) without “E” as the mounted data from the tray unit controller that controls the component supply device.
[0005]
Next, when the component is supplied and mounted on the printed board, 'E' is written in the execution identification column of the step in the list, and a request for the component of the next step is made.
[0006]
[Problems to be solved by the invention]
However, since the initialization of the execution identification code in the preparation request table is the board carry-in start timing, the component supply device ends the supply operation when the END of the request management list is reached, and the first step in the request management list This part is required when the next board is carried in. The operation of supplying the electronic component placed on the tray takes time to raise and lower the tray or to raise and lower the member that pulls out the tray, and also takes time because an operation to pull out the tray is necessary.
[0007]
Therefore, the mounting head may be in a waiting state while the mounting head takes out the components placed on the tray. This waiting time is determined when the step of mounting the tray component is at the beginning of the mounting data, or when the storage position of the tray on which the component to be finally removed is placed is far from the storage position of the tray to be extracted first, that is, there is a step. If it is large, it will be longer. In this way, if a waiting time is required for the mounting head to take out the parts, the production efficiency of the apparatus has been reduced.
[0008]
Therefore, an object of the present invention is to prevent the production efficiency of component mounting from being reduced when electronic components are supplied from a multi-stage tray.
[0009]
[Means for Solving the Problems]
For this reason, the present invention provides a component mounting control unit that requires a desired electronic component based on mounting data created for each type of printed circuit board, and an electronic device that pulls out a desired tray from multiple trays to a component extraction position. An electronic component mounting apparatus comprising: a component supply device that performs a component supply operation for supplying a component; and a component supply control unit that controls a component supply operation of the component supply device in response to a request from the component mounting control unit. The mounting control unit detects the completion of mounting the electronic component to be finally mounted in the mounting data among the electronic components stored in the tray, and mounts the electronic component stored in the tray from the mounting data. And a preparation request table storage means for storing a preparation request table composed of data for extracting only the order to be performed and specifying the order and electronic components to be supplied. In addition, the mounted data for indicating that the component mounting has been executed for each step of the table is written in the storage means, and the detection means has presence / absence of the mounted data in the preparation request table stored in the storage means On the basis of this, the completion of mounting of the electronic component to be finally mounted on the printed circuit board is detected, and in response to the detection, the electronic component to be mounted first in the tray is requested to the component supply control unit .
[0010]
In this way, after the electronic component housed in the last tray is mounted on the printed circuit board, the component supply device should be mounted on the first board of the next board before the next board is loaded. can start the operation of supplying the housing parts, also, the component mounting controller can detect the mounting completing the parts to be final mounting seeing only the presence or absence of the attachment completion data in preparation request Deburu.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an electronic component mounting apparatus according to the present invention will be described in detail with reference to the accompanying drawings.
[0014]
This electronic component mounting apparatus is a so-called multi-functional chip mounter, and is configured to be able to mount various electronic components 46 such as surface mount components such as chip capacitors and chip resistors, and multi-lead components such as flat pack ICs. . FIG. 2 is a plan view of the electronic component mounting apparatus. As shown in FIG. 2, the electronic component mounting apparatus 1 includes an apparatus main body 2 for mounting the supplied electronic component 46 on the printed circuit board 7, and an apparatus main body 2. A first component supply device 3 that supplies a small electronic component 46 such as a surface mount component, and a second component supply device 4 that supplies a large electronic component 46 such as a multi-lead component to the apparatus main body 2 are provided.
[0015]
The apparatus main body 2 includes a machine base 5, a board transport mechanism 6 that transports the printed circuit board 7 to the center of the machine base 5, a head unit 8 that includes two mounting heads 9 and a board recognition camera 10, and a head unit. And an XY stage 11 for moving 8 in the XY direction. That is, a component mounting mechanism is configured by the head unit 8 and the XY stage 11. By the operation of the XY stage 11, the mounting head 9 faces the first component supply device 3 or the second component supply device 4 and picks up the electronic component 46, and the electronic component 46 is further mounted on the substrate 7 set on the set table. To do. When this operation is repeated and the mounting of the electronic component 46 on the substrate 7 is completed, the substrate 7 is sent out on the transport path 12 by the substrate transport mechanism 6, and a new substrate 7 is replaced with the machine base 5 instead. Introduced above.
[0016]
The first component supply device 3 has a large number of cassette-type tape feeders 13 arranged side by side so that the tip on the component supply side faces one side of the machine base 5 parallel to the transport path 12. That is, it is arranged so as to face the pickup area S of the mounting head 9. Each tape feeder 13 accommodates electronic components 46 in a state of being loaded on a carrier tape (not shown), and the electronic components 46 are supplied one by one from the tip of the tape feeder 13.
[0017]
The second component supply device 4 is disposed on the other one side that intersects the one side of the machine base 5 facing the first component supply device 3 at a right angle. In the second component supply device 4, a large number of electronic components 46 are arranged on the electronic component storage tray T, and one or more trays T are mounted on the pallet P. The electronic component 46 is supplied to the apparatus main body 2 by facing the pickup area S between the component supply device 3 and the substrate 7.
[0018]
On the other hand, the suction nozzle 14 that sucks the electronic component 46 is detachably attached to the lower end of each mounting head 9. A plurality of types of suction nozzles 14 are prepared and can be appropriately replaced in accordance with the planar shape and weight of the electronic component 46. In this case, the suction nozzle 14 for replacement is accommodated in a nozzle stocker 15 disposed on the upper surface of the machine base 5. In the nozzle stocker 15, a plurality of types of suction nozzles 14 to be used are set side by side.
[0019]
A component recognition camera 16 that recognizes the position of the electronic component 46 sucked by the suction nozzle 14 is disposed in the vicinity of the nozzle stocker 15. Prior to mounting on the substrate 7, the electronic component 46 sucked by the suction nozzle 14 is displaced by the component recognition camera 16 in the X, Y, and θ directions (rotation angles in the horizontal plane) with respect to the axis of the suction nozzle 14. The amount is detected. Based on this detection result, the displacement in the θ direction is corrected by the rotation of the suction nozzle 14, and the displacement in the X and Y directions is corrected by the XY stage 11.
[0020]
Next, the second component supply device 4 will be described in detail with reference to FIGS. 2 and 3. The second component supply device 4 stocks a large number of pallets P and also conveys the pallet P vertically to a predetermined level position, and the pallet P from the elevator mechanism 21 to the pickup area S of the apparatus body 2. It comprises a pallet introduction mechanism 22 that transports in the horizontal direction. The component supply device in the form of the second component supply device 4 is also referred to as a multistage tray. Note that the pickup area S in this embodiment is extended to the immediate vicinity of the elevator mechanism 21.
[0021]
The elevator mechanism 21 includes a pallet stocker 31 that accommodates a large number of pallets P in the vertical direction, and an elevating mechanism 32 that lifts and lowers each pallet P via the pallet stocker 31. The pallet stocker 31 is configured by arranging a plurality of shelf members 33 on which the pallet P is placed in the vertical direction. The right side of the pallet stocker 31 in the figure is wide open, and the pallet P is drawn out from this portion to the apparatus main body 2 side.
[0022]
The elevating mechanism 32 has a frame (not shown) that holds the pallet stocker 31, a ball screw 34 that is screwed into a part of the frame and moves it up and down, and is arranged on both sides of the ball screw 34 to guide the elevating movement of the frame. A pair of left and right guide rails 35 and 35, and a lifting motor 36 connected to the base end of the ball screw 34 and rotating it. As the ball screw 34 rotates forward and backward via the lift motor 36, the frame is guided by the guide rails 35 and 35 and moves up and down. When the frame moves up and down, the pallet stocker 31 held by the frame moves up and down while the pallet P is accommodated.
[0023]
In the elevator mechanism 21 configured as described above, the lifting motor 36 of the lifting mechanism 32 is connected to a tray unit controller 23 as a component supply control unit, and the lifting operation is controlled by the tray unit controller 23. In the lifting / lowering operation, the level position of the desired shelf member 33 of the pallet stocker 31 and the level position of the drawer path 41 of the pallet introduction mechanism 22 described later are matched. In a normal raising / lowering operation, the empty shelf member 33 is placed on standby at this level position to receive a used pallet P, and a new pallet P is moved to this level position and delivered to the pallet introduction mechanism 22.
[0024]
On the other hand, the pallet introducing mechanism 22 includes a drawer path 41 disposed on the machine base 5 of the apparatus body 2, a locking arm 42 that moves forward and backward along the drawer path 41, and a drive mechanism 43 that moves the locking arm 42 forward and backward. It consists of and. A hook 44 that engages with and disengages from the pallet P is provided at the front end of the locking arm 42, and the locking arm 42 is advanced by the drive mechanism 43, and the front end of the pallet P accommodated in the elevator mechanism 21. Next, the locking arm 42 is retracted, and the pallet P is introduced into the pickup area S along the drawing path 41.
[0025]
The drive mechanism 43 is also connected to the tray unit controller 23 and interlocks with the elevator mechanism 21. The tray unit controller 23 is connected to the component mounting control unit 24. A component mounting mechanism composed of the head unit 8 and the XY stage 11 is connected to the component mounting control unit 24 so that the pallet introduction mechanism 22 and the component mounting mechanism cooperate with each other. That is, the pickup area S is extended to the immediate vicinity of the elevator mechanism 21, and the pallet introduction mechanism 22 is configured so that the pallet P can be introduced into any part extraction position of the drawer path 41 in the pickup area S, and this introduction is performed. The mounting head 9 of the component mounting mechanism can be picked up with respect to the electronic component 46 of the pallet P.
[0026]
Further, the component mounting control unit 24 has a storage unit 26 for storing various data and programs. In addition to the above-described driving unit, the component mounting control unit 24 moves the XY stage 11 in the XY direction (horizontal direction) and moves the mounting head 9 to the XY stage 11. Controls the drive to be lifted and lowered.
[0027]
The storage unit 26 has a program for executing the flowchart shown in FIG. 1, mounting data shown in FIG. 4, component arrangement data shown in FIG. 5, tray stage information shown in FIG. 6, preparation request table shown in FIG. Is remembered.
[0028]
The mounting data is data for designating which type (FDR number) and in what direction (angle Z) on which (X, Y) of the board 7, and in accordance with these data in the order indicated by P-NO. 46 is mounted and is created for each type of printed circuit board 7. The FDR number is data for specifying an electronic component to be supplied.
[0029]
The component arrangement data is data indicating which component (component ID) is set to which feeder position (FDR number).
[0030]
The tray stage information is data indicating which tray (FDR number) is set in which stage of the pallet stocker 31 of the second component supply device 4. In the case of the present embodiment, the FDR numbers in the 300s are assigned to the second component supply device 4, and the 100s are attached to the tape feeder 13 in the first component supply device 3.
[0031]
The preparation request table shown in FIG. 7 is created from data obtained by extracting the FDR numbers for the components 46 stored in the tray type, that is, the second component supply device 4 from the mounting data of FIG. That is, an FDR number (determined based on the 300s) indicating the tray type is extracted from the mounting data, is generated in the component mounting control unit 24 as a tray-specific component request management list, and is written in the storage unit 26. This data generation and writing to the storage unit 26 is performed at the time of program change, that is, in order to produce different types of printed circuit boards 7, the mounting data is changed to those for the new circuit board 7 as various setup change operations. Sometimes done. Here, the numbers (steps) are assigned in order of P-NO numbers in the mounting data, and are generated by writing the FDR numbers in the request management list. END indicates the end of the list. Although the mounted data 'E' can be written in the execution identification column, this writing is also shown in the flowchart of FIG. 1 when the mounting of the component 46 having the FDR number on the board 7 is completed. The The storage unit 26 stores a preparation request table as preparation request table storage means.
[0032]
Next, the operation will be described.
[0033]
The electronic component 46 is sucked and mounted according to the mounting data of FIG. When the printed circuit board 7 is carried through the conveyance path 12 and fixed, the control unit 24 moves the mounting head 9 to take out the component 46 specified in the first P-NO of the mounting data, and the component 46 with the FDR number 101. To take out.
[0034]
On the other hand, the control unit 24, in accordance with the flowchart of FIG. 1, checks whether ascending order on the mounting-data-'E' numbers running identification column in FIG. 7 is attached, because it is not yet attached anywhere, stage number 1 Is requested to the tray unit controller 23 to instruct the start of supply.
[0035]
Next, the tray unit controller 23 reads from the tray stage information in FIG. 6 that the FDR number 301 is the stage number 1, and the pallet stocker 31 is moved up and down by the lifting mechanism 32 to pull out the tray T with the stage number 1. The number 1 pallet P is positioned on the drawer path 41.
[0036]
Next, the hook 44 driven by the drive mechanism 43 controlled by the controller 23 pulls out the pallet P and stops it at a predetermined position in the pickup area S.
[0037]
During this time, the mounting head 9 takes out the component 46 of P-NO “0001” of the mounting data from the first component supply device 3 and waits until the tray T is pulled out when the mounting is completed. Become.
[0038]
Next, when the tray T is pulled out to a predetermined position, the mounting head 9 is moved onto the electronic component 46 to be picked up placed in the storage recess 47 in the tray T under the control of the component mounting control unit 24 .
[0039]
Next, the mounting head 9 descends under the control of the component mounting control unit 24 and picks up and picks up the component 46.
[0040]
Next, the mounting head 9 is moved to the mounting position specified by the mounting data of the printed circuit board 7 through the recognition of the recognition camera 10 by the movement of the XY stage 11.
[0041]
When the control unit 24 detects that the component 46 of P-NO “0002” is mounted, the control unit 24 adds the mounted data “E” to the mounted execution identification code (execution identification column) according to the flowchart of FIG. 'Is written and the list is processed.
[0042]
Next, the control unit 24 determines whether or not the request management list of FIG. 7 is END, and since it is NO, the execution identification code analysis of the list is performed again, and the parts request of the FDR number 302 of FIG. Start is instructed. The supply operation of the part 46 is performed by storing the pallet P having the tray T on which the part having the current FDR number 301 is placed in the stage number 1, raising the pallet stocker 31, and pulling out the pallet P having the stage number 5 It is done by going to and pulling out.
[0043]
In parallel with the supply operation of the second component supply device 4, the mounting head 9 performs the component removal and mounting operation from the first component supply device 3 according to the mounting data of FIG. The take-out is performed from the pulled-out tray T, and the same operation as described above is performed.
[0044]
In this way, when the component 46 with the FDR number 304 of the mounting data P-NO “0007” is taken out from the tray T and mounted on the substrate 7, the mounted data is displayed in the execution identification column number 3 in the table of FIG. 'E' is written and the list stepping process is performed. At this time, since the request management list is END, the execution identification code of the list, that is, the execution identification column of the preparation request table of FIG. 7 is initialized, and all the mounted data “E” is deleted. That is, since the mounted data is written in all the execution identification fields, the component mounting control unit as the detecting means selects the electronic component 46 to be finally mounted in the mounting data among the electronic components 46 stored in the tray T. The completion of the mounting on the printed circuit board 7 is detected, and the execution identification column is initialized.
[0045]
Next, since the execution identification column of No. 1 in the preparation request table is blank, the control unit 24 requests the controller 23 for the electronic component 46 having the FDR number 301 and instructs the supply start of the component 46.
[0046]
In response to this instruction, the component supply operation of the second component supply device 4 is started in the same manner as described above immediately after the component 46 with the FDR number 304 is mounted.
[0047]
Next, in parallel with the component supply operation of the second component supply device 4, the printed board 7 on which all the components 46 have been mounted is discharged and conveyed, and then the next board 7 is carried in. That is, the component supply operation of the second component supply device 4 is started before the printed circuit board 7 is carried in.
[0048]
When the substrate 7 is fixed at a predetermined position, the mounting head 9 takes out the component 46 according to the mounting data and mounts it on the printed circuit board 7. When the mounting data P-NO “0002” is taken out, if the component supply operation is earlier than the discharge and carry-in operations of the substrate 7, the tray T for storing the component 46 of the FDR number 301 is pulled out. The part 46 is taken out from T. Even if the component supply operation is slower, the tray T can be pulled out earlier than when the component supply operation of the second component supply device 4 is performed simultaneously with the loading of the substrate 7, and the mounting head 9 There is less waiting time.
[0049]
Further, in the mounting data of FIG. 1, the placement component 46 of the last tray T is the last step component in the entire mounting data, but the first component supply is performed after the placement component 46 of the last tray T. When the mounting data includes the component 46 supplied from the apparatus 3, the component supply operation of the second component supply device 4 is performed in parallel with the mounting operation of these components 46, and then the substrate transfer operation is further performed. Therefore, the supply operation is completed earlier than the case of starting the component supply operation when starting the board conveyance.
[0050]
【The invention's effect】
As described above, according to the present invention, after the electronic component housed in the last tray is mounted on the printed circuit board, the component supply device is placed at the beginning of the next board before the next board is loaded. Since the operation of supplying the tray storage component to be mounted can be started, the time that the mounting head waits to remove the component from the tray can be shortened, and the production efficiency of component mounting can be prevented from being reduced.
[0051]
In addition, the component mounting control unit detects the completion of mounting of the component that should be finally mounted by looking only at the presence / absence of the mounted data in the preparation request table, so that the control can be simplified compared with the case of directly judging from the mounting data. Can do.
[Brief description of the drawings]
FIG. 1 is a flowchart of a component request process from an apparatus main body to a tray unit controller according to the present invention.
FIG. 2 is a plan view of the electronic component mounting apparatus.
FIG. 3 is a side view of the electronic component mounting apparatus.
FIG. 4 is a diagram showing mounting data.
FIG. 5 is a diagram showing component arrangement data.
FIG. 6 is a diagram showing tray stage information.
FIG. 7 is a diagram showing a preparation request table.
FIG. 8 is a flowchart illustrating a component request process from the apparatus main body to the tray unit controller according to the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electronic component mounting apparatus 2 Apparatus main body 4 2nd component supply apparatus (component supply apparatus)
7 Printed circuit board 9 Mounting head 21 Elevator mechanism 22 Pallet introduction mechanism 23 Tray unit controller (component supply control unit)
24 Component mounting control unit (detection means)
26 storage unit (preparation request table storage means)
46 Electronic component T tray

Claims (1)

A component mounting control unit that requests a desired electronic component based on mounting data created for each type of printed circuit board, and a component supply that supplies the electronic component by pulling out the desired tray from the trays stored in multiple stages to the component extraction position In an electronic component mounting apparatus having a component supply device that performs an operation and a component supply control unit that controls a component supply operation of the component supply device in response to a request from the component mounting control unit, the component mounting control unit is placed on a tray. Of the stored electronic components, only the detection means for detecting the completion of mounting of the electronic components to be finally mounted on the printed circuit board in the mounting data and the order of mounting the electronic components stored in the tray are extracted from the mounting data. And a preparation request table storage means for storing a preparation request table composed of data for specifying the order and electronic components to be supplied. The mounted data for indicating that the component mounting has been executed is written for each step of the table, and the detection means should be finally mounted based on the presence or absence of the mounted data in the preparation request table stored in the storage means An electronic component mounting apparatus that detects completion of mounting of an electronic component on a printed circuit board and requests the electronic component to be mounted first in the tray in the component supply control unit according to the detection.

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