JPH10154896A - Method and device for mounting parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of parts mounting operations by making a parts mounting machine collectively exchange a plurality of out-of-parts cassettes for another. SOLUTION: A parts mounting machine reduces the number of parts exchanging operations in such a way that, when one kind of parts run out, the machine continues the parts mounting operations by picking up the parts from a waiting table and, when a plurality of kinds of parts run out, the machine makes supply tables to wait at waiting positions and informs the operator of the shortage of the parts. In addition, the efficiency of the parts exchanging operations is improved by informing the designations of parts to be exchanged in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component mounting apparatus such as an electronic component mounting machine, and more particularly to an operation of a supply table when a component runs out and a method of notifying the component running out.

[0002]

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

In FIG. 7, reference numeral 1 denotes an operation control unit; 1a, an operation unit thereof; an input device for instructing the apparatus, data input; a menu for various operations; and a screen for displaying the state of the apparatus. It has. Reference numeral 2 denotes a mounting unit, which includes a plurality of mounting heads and nozzles for suctioning components for each head, and performs a suction and mounting operation of the components by this rotation operation. Reference numeral 3 denotes a board positioning unit formed of an orthogonal table, which positions the circuit board at an arbitrary position by rotating the X-axis and Y-axis motors. Reference numeral 4 denotes a number of electronic component supply means (hereinafter, referred to as a cassette).
Is a component supply unit having a plurality of supply tables on which the cassette is mounted. The supply table moves the mounted cassette to an electronic component suction position or a cassette replacement position by driving a Z-axis motor. The component supply unit 4 has two supply tables, a supply table A and a supply table B, each having a unique number (hereinafter, referred to as a Z number) for identifying the position of the cassette. ZA and ZB in the figure indicate a supply table A and a supply table B, respectively.

FIG. 8 shows a supply table A and a supply table B.
3 shows a list of the operation patterns. The connection mode is a mode in which the supply table A and the supply table B are a series and components are supplied from both tables. The preparation mode is a mode in which one of the supply tables is dedicated to the production of one of the supply tables while the other table is on standby to prepare a cassette of the next product type. In the exchange mode, the same parts and the same cassette arrangement are set in the supply table A and the supply table B, and when parts run out in the priority table, the system automatically switches to the parts supply from the other spare table and runs out of parts in the spare table. This is a mode in which the movement to the standby position does not occur until the occurrence of. The priority replacement mode is the same as the replacement mode, except that the spare table operates only during the replacement of the part-out cassette in the priority table, and the priority table is used intensively. In both the exchange mode and the priority exchange mode, it is necessary to specify a priority table before production.
For these operation patterns, appropriate ones are selected according to various production modes, such as in the case of small-volume production with many model changes, or in the case of high-volume production with little model change.

FIG. 9 shows a part of data necessary for producing a circuit board.

FIG. 9A defines an order in which electronic components are mounted (referred to as a block in each order) and is called an NC program. Each block has a two-dimensional position coordinate for mounting the electronic component and a Z number for designating a cassette for sucking the electronic component. FIG. 9B is a supply table that defines the Z numbers and the types of electronic components set in the cassette, and is called an array program. In the production of the circuit board, the creation and selection of data partially shown in FIG.
The data for mounting the intended electronic component at each mounting position is transferred and the model is switched by selecting the operation pattern of the supply table shown in FIG.

In the electronic component mounting machine configured as described above, the operation of each supply table according to the operation pattern for exchanging the component exhaustion cassette when the component exhaustion occurs, and the work procedure at the time of the exchange will be described below. Will be described.

[0008] When operating in the connection mode or the preparation mode, the supply table that has run out of components moves to the standby position at that time and waits for the replacement of the run-out cassette. The operator judges the state of the component supply unit 4 displayed on the screen of the operation unit 1a of the operation control unit 1 in FIG. Replace the cassette. After the replacement is completed, the apparatus is notified by pressing the replacement completion button provided at the standby position, and immediately moves to the suction position to continue the production.

When operating in the exchange mode, if a component shortage occurs in the supply table specified in the priority table when the model is switched, the component shortage occurs in the circuit board under production until the final block of the NC program is reached. Skip the block with the Z number and continue production. When the last block of the NC program is reached, the supply table that has run out of components moves to the standby position and waits for the replacement of the run-out cassette. On the other hand, the spare table immediately moves to the suction position and operates so as to replenish the skipped blocks. Next, even if the circuit board to be produced is carried in, the supply table at the standby position does not move to the standby position until parts run out of the active standby table, and the supply table at the standby position becomes a standby table for the active supply table. . The operator replaces the out-of-parts cassette while the supply table is at the standby position, and presses a replacement completion button.

When operating in the priority replacement mode, the production is continued using the spare table even if the parts run out as in the replacement mode. However, the production using the spare table is performed until the next circuit board to be produced is carried in, and the supply table specified in the priority table is again operated with priority. If a component shortage occurs in the priority table and the unit is moved to the standby position, the production of the next circuit board is not performed until the operator replaces the component shortage cassette and presses a button of completion of replacement. Similarly, the spare table can be operated after the cassette in which the parts have run out is replaced and the replacement completion button is pressed.

[0011]

However, in the above-described configuration, the supply table in which the parts have run out always moves to the standby position immediately after the breakage of the parts or after the end of the production of the circuit board being carried in. In a situation where the number of remaining electronic components is reduced uniformly, such as in the production of circuit boards on which various types of electronic components need to be mounted, the system is in a state of waiting for the completion of replacement of parts by the operator. There has been a problem that parts shortage has occurred and the operator frequently replaces parts.

Further, in connection with the above problem, there has been a problem that the parts replacement work of the operator cannot keep up and production is interrupted, thereby causing a reduction in the operation rate.

An object of the present invention is to provide a component mounting method and apparatus capable of improving the operation rate by eliminating production interruption due to frequent component replacement work due to component shortage.

[0014]

A component mounting method and apparatus according to the present invention hold a component at a component supply unit having a plurality of movable supply tables on which a plurality of component supply means are mounted, and move the component to a mounting position. A component mounting method for mounting by mounting a plurality of component supply means so that various types of components have the same arrangement on a plurality of supply tables, and specifying and using a supply table to be used and a supply table to be on standby. In case of running out of parts in the supply table, this supply table is automatically put on standby, and in the operation mode where production is continued by using the standby supply table, there is a certain upper limit on the number of types of parts that have run out of parts. When the value reaches the value, the supply table is set in a state where components can be replaced, and the notification of the component shortage is performed. Replace in bulk goods, eliminating the production interruption due to frequent replacement of components work, so that to improve the utilization rate.

Also, based on the remaining number of each component supplied and the number of parts that can be calculated from the number of parts used per board, a predetermined number of circuit boards to be continuously produced after the occurrence of the first component exhaustion. When the specified number of sheets are produced, the supply table is set to a state where parts can be replaced, and a notification of parts shortage is sent, so that the period from when parts shortage occurs first to when parts replacement is actually performed is controlled. can do.

Further, if a list of parts to be replaced is displayed in advance before the work of replacing the part that has run out of parts, the operator is given an accurate instruction to prepare for the next part replacement work. This can improve the work efficiency of the operator.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electronic component mounting machine according to a first embodiment of the present invention will be described below with reference to FIGS. Note that the overall configuration of the electronic component mounter is the same as that of the conventional example described with reference to FIG.

In FIG. 1, reference numeral 5 denotes a component recognizing unit, which is a block for specifying the type and shape of the electronic component sucked by the nozzle of the mounting unit 2 by two-dimensional image processing. The component out-of-component state is determined based on whether or not the suction is performed. Reference numeral 6 denotes a part outage information accumulation unit.
This is a block for holding the Z number of a component shortage that occurs until the device is ready for component replacement. Reference numeral 7 denotes a component replacement determining unit which determines whether or not to replace a component based on an instruction from the component recognizing unit 5 and the component shortage information accumulating unit 6. When performing component replacement, the supply table operation control unit 8 moves the supply table to a standby position where components can be replaced. In the screen display unit 9, the Z in which the component runs out is generated.
The number and the name of the electronic component are displayed on the display screen of the operation unit 1a. When the component replacement work by the operator is completed, the supply table is made operable to the suction position by the component replacement completion processing unit 10, and the component outage information accumulation unit 6 is notified of the cancellation of the component outage state.

FIG. 2 shows a flowchart of a component replacement operation when mounting electronic components. In FIG. 2, when the production is started (Step # 1), the number e of cassettes in which parts are currently running out is initialized in the supply table (Step # 2). In step # 3), it is first determined whether the operation pattern of the supply table is the exchange mode or the priority exchange mode (step # 4). Step # in case of connection mode or preparation mode other than exchange mode or priority exchange mode
Jump to 10. In the case of the replacement mode or the priority replacement mode, 1 is added to the number e of the out-of-component cassettes (step # 5), and it is determined whether or not the component replacement work of the spare table has been completed (step # 6). If so, it is determined whether or not the number e of the out-of-component cassettes is smaller than a preset value E (step # 7).
Here, E is the accumulation of the number of component out cassettes until the component out notification, and is an appropriate value registered in advance by the operator in the apparatus. If the number e of component-cut cassettes is smaller than E, that is, if E> e, the operator is not notified even if components have run out, and production is continued while using a spare table for the components of the component-cut cassette. (Step # 8). Specifically, the production is continued while skipping the block of the Z number in which the component has run out until reaching the last block of the NC program. Thereafter, when the NC program reaches the last block, the supply table in which the component has run out moves to the standby position, and the spare table immediately moves to the suction position to operate in a manner of replenishing the skipped block. Thereafter, when the next circuit board is carried in, the spare table is again moved to the standby position and the priority table is operated.

When the number e of the out-of-part cassettes reaches E, the process proceeds to step # 9, and the block with the out-of-part number is skipped until the end block of the NC program is reached. Upon reaching the last block, the process proceeds to step # 10. Step # 10
Then, the occurrence of parts shortage is notified to the operator, the supply table moves to the standby position, and a state in which parts replacement work is possible. FIG. 3 shows a menu for displaying the state of the component supply unit displayed on the screen of the operation unit 1a. In FIG.
Reference numeral 11 denotes the name of the electronic component set to each Z number in the A table, and 12 denotes the name of the electronic component set to each Z number in the B table. The Z number and the name of the electronic component in which the parts run out during the production are identified by being displayed in red. Reference numeral 13 denotes an area for displaying an error that has occurred in the apparatus. When notifying the occurrence of component shortage as described above, a message to that effect and a Z number indicating the location where the error occurred are output. Then, the process proceeds to step # 11, where the operator performs a component replacement operation based on the displayed information. In this state, if one of the spare tables is operable, the production is continued in the exchange mode or the priority exchange mode. On the other hand, the supply table that has run out of parts cannot operate for the next operation request unless the part replacement is completed.

In the first embodiment, the larger the parameter E registered by the operator, the larger the value.
The number of circuit boards that can be produced continuously until the notification of parts shortage increases, and the number of cassettes that can be replaced by the operator in a single part replacement operation increases, but parts shortage occurs first. Until the parts are replaced, the movement of the priority table and the spare table between the suction position and the standby position occurs every time one circuit board is produced. In addition, since the mounting order of the mounting block during the occurrence of the component shortage is changed after the mounting of the last block of the NC program, the productivity is reduced as compared with the mounting operation according to the mounting order defined by the NC program.

On the other hand, as the parameter E becomes smaller,
The number of circuit boards that can be continuously produced before the notification of the component exhaustion is reduced. Therefore, it is necessary to adjust and set the parameter E to an optimum value according to the production mode.

As described above, according to the present embodiment, the supply table is operated so that a plurality of out-of-component cassettes can be replaced at a time in the out-of-component replacement operation, and an appropriate instruction is given, thereby enabling the operator to perform the operation. Can be reduced.

In the above-described embodiment, the electronic component mounting machine having the mounting portion 2 having the rotary head and the board positioning portion 3 having the orthogonal table as shown in FIG. 7 has been described. Needless to say, the present invention can also be applied to an electronic component mounting machine having the mounting section 2 provided with a mounting head.

Next, a second embodiment of the present invention will be described.
This will be described with reference to FIGS. FIG. 4 shows the operation unit 1 shown in FIG.
13 is a screen example of a menu displayed on the screen of FIG. a and referring to the remaining number of electronic components mounted on each cassette corresponding to the Z number of the supply table. In FIG. 4, reference numeral 14 denotes a button for switching an item displayed for each Z number. In addition to the remaining number of electronic components, a message for notifying the initial value of the number of electronic components to be initially set and the running out of components. Is displayed at the time when is displayed.

FIG. 5 shows the relationship between each Z number, the remaining number of electronic components at each Z number, and the number of possible productions before the occurrence of component exhaustion, calculated from the number of electronic components used in the production of one circuit board. FIG. 4 is a relationship diagram schematically showing the relationship. FIG.
, 15 indicates the number of possible productions based on the number of remaining electronic components in the priority table, 16 indicates the number of productions possible based on the number of remaining electronic components in the spare table, and 17 indicates the number of copies that can be provided to the operator from the time when the parts run out first during production. This indicates the number of circuit boards to be produced by using the spare table together before the out-of-stock is notified and the supply table is ready for component replacement at the standby position.

FIG. 6 shows an example of a screen for instructing the operator to prepare for the next part replacement work. Reference numeral 18 denotes the number of circuit boards to be produced before the parts can be replaced.
Reference numeral 9 denotes a list of a Z number of a supply table for specifying a cassette to be replaced and a component name thereof.

In the first embodiment, the number E of component-out cassettes accumulated until a component-out is notified is fixedly provided. However, in the present embodiment, the operator continues during the component-out occurrence. The number of circuit boards to be manufactured and supplied at the point of time when parts run out for the first time, the next time that a part with a different Z number is replaced with a cassette having a Z number equal to or less than the given circuit board number, It is the target of parts replacement in work.

For example, in FIG. 5, if the number of circuit boards to be continuously produced is a, and if a component break occurs first in Z1 (producible number = 0), the producible number in each Z number is not more than a. Are subject to the next part replacement.
Let m2, m3, and m4 be the producible numbers of Z2, Z3, and Z4 in the priority table, respectively, and m2 <a, m3 =
If a, m4> a, Z1, Z2, and Z3 are to be replaced next time.

Since the spare table is used together with the production of a circuit boards after the occurrence of the component shortage, the spare table for mounting a replacement cassette for the next cassette to be replaced is replaced. It is necessary that each producible number in the number is a or more. If there is a Z number in the substitute cassette where the number of sheets that can be produced is smaller than the number a, the spare table will be out of parts first, so the notification of the out of parts accumulated at the time of this part replacement work At the same time, move both tables to the standby position, and wait for the completion of the part replacement work.

For example, in FIG. 5, if the number of sheets Z1 and Z2 that can be produced in the spare table is n1 and n2, respectively, and n1 <a, n2> = a, the spare table may be out of parts during the production of a sheets. Occur. Here, m2 <
If n1 <a, at the time of the component shortage in the spare table Z1, since the component shortage has already occurred in the priority table Z2, the priority table Z1, Z2 and the spare table Z1 are notified as the component shortage. On the other hand, m2> = n
If it is 1, Z2 in the priority table and Z1 in the spare table have not yet run out of parts.
1 is notified as part exhaustion.

Further, since the cassette to be replaced next time can be specified at the time when the parts run out for the first time,
According to the screen example shown in FIG. 6, a preparation instruction for component replacement work can be given to the operator accurately.

As described above, according to the present embodiment, by giving the number of circuit boards to be produced from the occurrence of a component shortage to the actual replacement of parts, the operation of both tables can be performed simultaneously. Since the reduction in productivity can be proportionally controlled from this number, it is easy to make settings for optimizing the timing of notification of component shortage. Further, by displaying a list of cassettes to be replaced next time on the screen, an improvement in operator's work efficiency can be expected.

[0034]

According to the component mounting method and apparatus of the present invention, as is clear from the above description, the supply table can be replaced when the number of types of components that have run out of components reaches a certain upper limit. And the operator is notified of the lack of parts, so when replacing parts due to lack of parts, it is possible to replace multiple parts at once,
In production using many kinds of parts, the effect that the number of parts replacement work by the operator can be greatly reduced is exhibited.

In addition, based on the remaining number of parts supplied and the number of parts that can be calculated from the number of parts used per board, a predetermined number of circuit boards to be continuously produced after the occurrence of the first part exhaustion. Is set, and when the predetermined number of sheets are produced, the supply table is set in a state where parts can be replaced and a notification of part shortage is given, and a period from the first occurrence of part shortage to the actual part replacement work is controlled. Therefore, it is possible to increase the efficiency of component replacement work while suppressing a decrease in productivity due to the combined operation of the priority table and the spare table within an appropriate range.

Further, if a list of parts to be replaced is displayed in advance before the replacement of a part that has run out of parts at this time, the operator can be properly instructed to prepare for the next part replacement work. , And the work efficiency of the operator can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram related to a component replacement process in a first embodiment of a component mounter of the present invention.

FIG. 2 is a flowchart of a component replacement processing operation in the embodiment.

FIG. 3 is an explanatory diagram illustrating an example of a screen that displays a state of a component supply unit according to the first embodiment.

FIG. 4 is an explanatory diagram of an example of a menu screen for referring to the remaining number of components of each cassette corresponding to a Z number in a supply table in the second embodiment of the component mounter of the present invention.

FIG. 5 is an explanatory diagram of an example of a screen displaying the relationship between the Z number of a supply table and the number of products that can be produced until a component runs out in the embodiment.

FIG. 6 is an explanatory diagram of an example of a menu screen for preparing a component replacement operation in the embodiment.

FIG. 7 is an external perspective view of a general electronic component mounting machine.

FIG. 8 is an explanatory diagram of an operation pattern of a supply table.

FIG. 9 is an explanatory diagram of a program for producing a circuit board.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 operation control unit 1 a operation unit 2 mounting unit 3 board positioning unit 4 component supply unit 5 component recognition unit 6 component outage information storage unit 7 component replacement determination unit 8 supply table operation control unit 9 screen display unit 10 component replacement completion processing unit ZA Supply table ZB Supply table

Claims (6)

[Claims] 1. A component mounting method comprising: holding a component by a component supply unit having a plurality of movable supply tables on which a plurality of component supply units are mounted, moving the component to a mounting position, and mounting the component; A plurality of component supply means are mounted so that various types of components are arranged in the same way, and a supply table to be used and a supply table to be waited for are designated. In the operation mode in which production is continued by using the supply table that is automatically put on standby and kept on standby, the supply table is made replaceable when the number of types of parts that have run out of parts reaches a certain upper limit. A component mounting method characterized in that a notification of a component shortage is issued. 2. A predetermined number of circuit boards to be continuously produced after the occurrence of the first component shortage, based on a remaining number of supplied components and a possible production number calculated from the number of parts used per board. 2. The component mounting method according to claim 1, wherein when the predetermined number of sheets are produced, the supply table is set in a state where components can be replaced and a notification of component exhaustion is given. 3. The component mounting method according to claim 2, wherein a list of components to be replaced is displayed in advance before the operation of replacing the component that has run out of components. 4. A component supply unit having a plurality of movable supply tables on which a plurality of component supply means are mounted, a mounting unit for holding the component in the component supply unit, moving the component to a mounting position, and mounting the substrate. Equipped with a board positioning unit for positioning at an arbitrary mounting position, and an operation control unit for the component supply unit, the mounting unit, and the board positioning unit, and in the operation control unit, a plurality of types of components are arranged in a plurality of supply tables in the same arrangement. A plurality of component supply means are mounted as described above, a supply table to be used for production and a supply table to be standby are designated, and when a supply table to be used is out of parts, the supply table is automatically set to standby and standby. In the operation mode in which production is continued by using the supply table that is available, the supply table can be replaced when the number of parts that have run out reaches a certain upper limit. A component mounting apparatus characterized by comprising means for notifying a component exhaustion in a state. 5. A predetermined number of circuit boards to be continuously produced after the occurrence of the first component shortage, based on the remaining number of each component being supplied and the number of possible productions calculated from the number of parts used per board. 5. The component mounting apparatus according to claim 4, further comprising: means for setting the supply table to a state in which components can be replaced when the predetermined number of sheets have been produced and notifying the user of component exhaustion. 6. The component mounting apparatus according to claim 5, wherein a means for displaying a list of components to be replaced is provided in advance before the operation of replacing the component that has run out of components.