JP4083369B2 - Electronic component mounting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic component mounting apparatus such as a screen printing apparatus or an electronic component mounting apparatus.
[0002]
[Prior art]
An electronic component mounting line for manufacturing a mounting substrate by mounting electronic components on a substrate is configured by various electronic component mounting apparatuses such as a screen printing apparatus and a mounting apparatus. In the electronic component mounting line, each device starts a production operation when a substrate is sent from the device in the previous process and this substrate is detected. In the steady production state, the substrates are sequentially supplied at a predetermined tact time, whereby the production operation is continuously executed in each apparatus.
[0003]
[Problems to be solved by the invention]
By the way, in a production line for mounting substrates used in various electronic devices, it has been required to cope with a variety of small-quantity production, and the production lot has been reduced to a small lot. For this reason, lot switching on the same line is frequently performed. However, conventionally, when this lot switching is performed, it is necessary for the machine operator to monitor whether or not the planned number of production has been reached, and to perform the operation to stop the production of the lot after confirming the planned digestion. It was. For this reason, there is a problem that a machine operator is required to be resident in the production line and it takes time and labor each time a lot is switched.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic component mounting apparatus that can save time and labor when switching production lots and improve production efficiency.
[0005]
[Means for Solving the Problems]
The electronic component mounting apparatus according to claim 1 is any one of the electronic component mounting apparatuses constituting an electronic component mounting line used in an electronic component mounting process in which an electronic component is mounted on a substrate to produce a mounting substrate. The planned production quantity setting means for setting the planned production quantity of the production target board, the production quantity detection means for detecting the production quantity of the produced board in the automatic production mode, and the production quantity of the produced board has reached the production quantity. If a production end informing means for informing the end of production to pre-process and post-process, the production end of the broadcast, compared before OFF the substrate request signal for process equipment, also post-process device This is performed by outputting a signal indicating that the substrate is the final substrate, and after this notification, the automatic production mode is automatically canceled.
[0006]
According to the present invention, it has set up scheduled production number of the production target substrate, by notifying the front end of production to process and post-process if the number of substrates previously production reaches the planned production number, lot Production efficiency can be improved by automating operations at the time of switching.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. 1 is a configuration diagram of an electronic component mounting line according to an embodiment of the present invention, FIG. 2 is a side view of a screen printing apparatus according to an embodiment of the present invention, and FIG. 3 is a screen printing according to an embodiment of the present invention. FIG. 4 is a block diagram showing a configuration of a control system of a screen printing apparatus according to an embodiment of the present invention. FIG. 5 is a flowchart showing a screen printing work execution flow according to an embodiment of the present invention. 6 and 7 are diagrams showing display screens of the screen printing apparatus according to the embodiment of the present invention.
[0008]
First, an electronic component mounting line and a screen printing apparatus will be described with reference to FIG. 1, FIG. 2, and FIG. The screen printing apparatus is an electronic component mounting apparatus used in the electronic component mounting process, and performs the first work process of the electronic component mounting line L. As shown in FIG. 1, on the upstream side of the screen printing apparatus M2, a substrate supply unit M1, which is a pre-process apparatus for supplying a substrate to the screen printing apparatus M2, is provided. The screen printing apparatus M2 that has received the substrate from the substrate supply unit M1 prints cream solder for soldering the electronic components at a predetermined position on the substrate.
[0009]
The board after the cream solder printing is sent to the bond application device M3, where bond application for electronic component adhesion is performed. Thereafter, the substrate is sent to the electronic component mounting apparatus M4, and the electronic component is mounted on the substrate. The substrate after the electronic component is mounted is sent to the reflow apparatus M5, where the substrate is heated and the electronic component is soldered to the substrate to complete the mounting substrate. The completed mounting board is collected by the board collecting unit M6.
[0010]
Next, the screen printing apparatus M2 will be described with reference to FIGS. In FIG. 2, the substrate positioning unit 1 is configured by stacking a θ-axis table 4 on a moving table composed of an X-axis table 2 and a Y-axis table 3, and further arranging a Z-axis table 5 thereon. . On the Z-axis table 5, there is provided a substrate holding part 7 that holds the substrate 6 on the lower receiving member by sandwiching the substrate 6 by the clamper 8. The substrate 6 to be printed is carried into the substrate positioning unit 1 by the carry-in conveyor 14 shown in FIG. By driving the substrate positioning unit 1, the position of the substrate 6 can be adjusted. The printed circuit board 6 is unloaded by the unloading conveyor 15.
[0011]
A substrate detection sensor 16 is provided on the transport path from the carry-in conveyor 14 to the substrate holder 7. The substrate detection sensor 16 detects the substrate carried into and out of the substrate holder 7. By counting this detection signal by a production amount detector (described later), the number of already produced substrates on which the printing operation has been performed by the screen printing apparatus, that is, the production amount, is detected.
[0012]
A screen mask 10 is held by a mask holding frame 9 above the substrate positioning unit 1. The screen mask 10 is configured by mounting a mask plate 12 on a holder 11. The substrate 6 is aligned with the mask plate 12 by the substrate positioning unit 1 and abuts from below. A squeegee unit 13 is disposed on the screen mask 10 so as to be reciprocally movable in the horizontal direction. In a state where the substrate 6 is in contact with the lower surface of the mask plate 12, cream solder is supplied onto the mask plate 12, and the squeegee of the squeegee unit 13 is brought into contact with the surface of the mask plate 12 to slide. The solder paste is printed through the pattern holes 12a (see FIG. 3) provided in the mask plate 12 on the surface of the film.
[0013]
Above the screen mask 10, a camera 20 as a recognition means is provided. As shown in FIG. 3, the camera 20 is horizontally moved in the XY directions by the X-axis table 21 and the Y-axis table 22. That is, the X-axis table 21 and the Y-axis table 22 are moving means. The substrate 6 is provided with recognition marks 6a and 6b at diagonal positions, and the mask plate 12 has an opening 12A (breakage of the mask plate 12) at a position corresponding to the recognition marks 6a and 6b provided on the substrate 6. 12B is provided, because it is located within the range, and is indicated by a chain line. When the substrate 6 is in a correct positional relationship with the mask plate 10, the recognition marks 6 a and 6 b can be visually recognized from above or imaged by the camera 20 through the openings 12 </ b> A and 12 </ b> B.
[0014]
Next, the configuration of the control system of the screen printing apparatus will be described with reference to FIG. In FIG. 4, a CPU 30 is an overall control unit and controls the entire screen printing apparatus. The program storage unit 31 stores various operation / processing programs, including a screen printing operation program. The data storage unit 32 stores various data such as product type data to be printed. The scheduled production amount storage unit 33 stores the scheduled production number input from the input unit 37. This scheduled production number is input prior to the start of the printing operation for each production lot. The input unit 37 and the scheduled production amount storage unit 33 are scheduled production amount setting means.
[0015]
The image processing unit 34 detects the positions of the recognition marks 6a and 6b and the openings 12A and 12B by performing image processing on image data obtained by imaging the substrate 6 and the screen mask 10 with the camera 20. The mechanism drive unit 35 drives mechanism units such as the X-axis table 2 and the Y-axis table 3, the θ-axis table 4, the Z-axis table 5, and the squeegee drive mechanism 40 that constitute an XY table for substrate positioning.
[0016]
The production amount detection unit 36 detects the number of already produced substrates, that is, the existing production amount by counting the substrate detection signals detected by the substrate detection sensor. Therefore, the substrate detection sensor and production quantity detection unit 36 is an already produced quantity detection means. Further, by measuring the interval between the substrate detection timings detected by the substrate detection sensor 16 by the CPU 30, it is possible to actually measure the passage interval of the substrates at the time, that is, the tact time of the screen printing work. Therefore, the substrate detection sensor 16 and the CPU 30 are tact time actual measuring means for actually measuring the production tact time.
[0017]
In this way, by obtaining the tact time by determining the interval at which the board actually passes through the screen printing device, the tact time of actual production including disturbance elements by other devices of the electronic component mounting line is obtained, and this Since the fluctuation of the tact time can be detected in real time, it is possible to obtain extremely useful data for production management.
[0018]
Then, by subtracting the above-mentioned already produced number from the planned production number, the remaining production number at the time is obtained. Then, by multiplying the remaining production number by the tact time at the time point, it is possible to obtain the scheduled required time until the production of the planned production number is completed, and therefore it is possible to predict the production end time. This calculation process is performed by the CPU 30. Therefore, the CPU 30 is an end time predicting unit.
[0019]
The input unit 37 is a data input unit such as a keyboard or a touch panel, and inputs control operation input and data such as a planned production quantity. The display unit 38 (display means) is a monitor, and displays a screen including a guidance screen at the time of data input, various management data during production, cycle time, predicted production end time, and the like. The communication unit 39 is a network means, and exchanges control signals such as signals for notifying the delivery of substrates and the end of production, and production management data with other devices before and after the process constituting the electronic component mounting line. Therefore, the communication unit 39 is a production end notification unit.
[0020]
The screen printing apparatus is configured as described above, and the execution flow of the screen printing operation will be described below with reference to the flowchart of FIG. 5 with reference to FIGS. 6 and 7 showing the display screen of the monitor. First, function selection and input are performed prior to the start of production (ST1). That is, whether or not to use the following production management function provided in the screen printing apparatus is selected, and when the use of the function is selected, necessary numerical data is input.
[0021]
This operation is performed using the operation keys 44 on the display screen (scheduled production number setting screen) 38a shown in FIG. First, whether or not to use the scheduled production number setting function is selected by operating the switch 41. If “use” is selected here, the setting of the scheduled production number is input into the input frame 42a. By making this input, when this screen is subsequently displayed during production, the remaining production quantity relative to the planned production quantity is displayed in the display frame 42b.
[0022]
Thereafter, the switch 43 is used to select whether or not to use the function for transmitting the production end signal. When “use” is selected here, as will be described later, a production completion signal is transmitted to the previous process when the production of the planned production number is completed. In other words, in this case, the substrate request signal is turned off with respect to the substrate supply unit M1 which is the pre-process apparatus.
[0023]
Thereafter, the process shifts to the automatic production mode, and the screen printing is started by performing the production start (ST2) operation. During the automatic production, every time a new substrate is supplied from the substrate supply unit M1 in the previous process, the screen printing apparatus M2 performs a printing operation for printing cream solder on the substrate, and the monitor shown in FIG. An intermediate screen is displayed, and if necessary, an input for changing the setting is made (ST3).
[0024]
On the production screen 38b, the set number of sheets input before the start of production is displayed in the display frame 45, the number of already produced sheets counted by detecting the substrate by the substrate detection sensor 16, and the number of already produced products set. The completion rates obtained by dividing by are displayed in the display frames 46 and 47, respectively. An operation rate indicating the operation status of the screen printing apparatus is also displayed in the display frame 48 at the same time. By these displays, it is possible to always grasp the production progress status of the production lot.
[0025]
In addition to these displays, the cycle times calculated based on the detection interval of the substrate detection sensor 16 and the estimated end times predicted by multiplying the cycle time by the remaining production number are displayed in the display frames 49 and 50, respectively. Is done. In the prediction of the end time, the tact time at the time is measured, and the estimated end time is obtained based on the actual measurement result. Therefore, based on the planned tact time on the desk as conventionally performed. Compared with the end time prediction, the scheduled end time can be predicted with higher accuracy.
[0026]
In this way, by displaying each of the above items during production, it is possible to constantly monitor the digestion status of the planned production amount of the production lot, and the scheduled end time is also displayed. It can be easily grasped, and daily production management can be performed easily and finely. When the setting of the production number is changed as necessary, the production number setting screen 38a shown in FIG. 6 is displayed again, and the production number setting is performed again.
[0027]
In addition, if such production management information is sent to a production management control device such as a host computer via the communication unit 39, the production departments having many production lines always monitor production progress in real time. can do.
[0028]
If the number of already produced sheets reaches the set number in the process of continuing the screen printing operation, the following production end process is performed (ST4). First, a production end notification is given to the substrate supply unit M1 in the previous process and the bond coating apparatus M3 in the subsequent process. This production end notification is made by turning off the substrate request signal to the substrate supply unit, and when the final substrate is unloaded and delivered to the bond coating device, a signal that the substrate is the final substrate is sent. This is performed by outputting via the communication unit 39. Thereafter, the automatic production mode is automatically canceled to return to the main menu (ST5), and it becomes possible to deal with a new production lot.
[0029]
In this way, by setting the planned number of production in advance before the start of production and notifying the end of production to other devices in the previous process at the end of production, it is not necessary for the operator to constantly monitor the production status, and at the time of production lot switching Can be automated to improve production efficiency.
[0030]
In this embodiment, a screen printing apparatus is shown as an example of an electronic component mounting apparatus. However, the present invention is not limited to this. For example, a bond coating apparatus that applies a bond to a substrate, a screen printing apparatus, or a bond The present invention can also be applied to an electronic component mounting apparatus that mounts electronic components on a substrate after coating.
[0031]
【The invention's effect】
According to the present invention, have set up scheduled production number of the production target substrate, the production end to the electronic component mounting apparatus of the previous step and after the step if the number of substrates previously production reaches the planned production number By notifying, the operation at the time of production lot switching can be automated to improve production efficiency.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an electronic component mounting line according to an embodiment of the present invention. FIG. 2 is a side view of a screen printing apparatus according to an embodiment of the present invention. FIG. 4 is a block diagram showing a configuration of a control system of a screen printing apparatus according to an embodiment of the present invention. FIG. 5 is a flowchart showing a screen printing work execution flow according to an embodiment of the present invention. 6 is a diagram showing a display screen of the screen printing apparatus according to the embodiment of the present invention. FIG. 7 is a diagram showing a display screen of the screen printing apparatus according to the embodiment of the present invention.
6 Substrate 16 Substrate detection sensor 30 CPU
33 Scheduled production volume storage unit 36 Production volume detection unit 37 Input unit 38 Display unit 39 Communication unit

Claims (1)

An electronic component mounting apparatus that constitutes an electronic component mounting line used in an electronic component mounting process in which an electronic component is mounted on a substrate to produce a mounting substrate, and sets a planned number of production target substrates. and planned production amount setting means, and the already produced amount detecting means for detecting the number of substrates previously produced in automatic production mode, discontinued the process and after the step before if the number of substrates previously production reaches the planned production number Production end notification means for notifying,
The notification of the end of production is performed by turning off the substrate request signal for the pre-process apparatus and outputting a signal indicating that the substrate is the final substrate to the post-process apparatus. An electronic component mounting apparatus, wherein the automatic production mode is automatically canceled.

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