JPH04219000A - Component mounting method - Google Patents

Abstract

PURPOSE:To improve the reliability of an automatic electronic component mounting machine and the availability factor by having a process of designating the parts supply part to be used preferentially, a process of judging whether the designated component supply part is being used or not, and a process of changing over the component supply part being used. CONSTITUTION:In a process of designating the priority side, the component supply part 12a to be used preferentially is designated. When the production is started, it judges whether there are components in the component supply part 12a or not, and if components are out, it is changed over to an auxiliary component supply part 12b. If there are components in the component supply part 12a, the mounting is performed. Next, if the component supply part 12a is being used at the point of time when the component mounting to a printed wiring board is finished, the operation is continued to carry in and carry out printed boards. In the case where the auxiliary component supply part 12b is being used, it judges whether the component supplement of the component supply part 12a is completed or not, and if it is in preparation, the auxiliary component supply part 12b is used, but if the preparation of the component supply part 12a is completed, it is changed over to the component supply part 12a.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting components in an automatic electronic component mounting apparatus.

0002

[Background Art] In recent years, society has become increasingly electronic,
High reliability and high operation are desired for electronic component automatic mounting machines.

[0003] An electronic component automatic mounting machine will be described below with reference to the drawings.

FIG. 2 is a perspective view of an automatic electronic component mounting machine.
0 is a component mounting head, 11 is an XY table, 12a, 1
2b is a component supply section which is a collection of component cassettes provided on the left and right, 13 is a control section, and 14 is an operation panel. Also, Figure 3
is a conceptual diagram of component supply in this electronic component automatic mounting machine.

Next, these operations will be explained. The control unit 13 controls the overall operation, and the component mounting head 1
0 sucks components from the component supply section 12a or 12b,
Components are mounted on the printed circuit board on the XY table 11. Further, the component supply sections 12a and 12b are a collection of component cassettes, and as shown in FIG.
Parts X are placed in the same order. The component supply sections 12a and 12b are not used simultaneously but are used selectively.

FIG. 4 is a flowchart of a conventional component mounting method.

In the conventional component mounting method, step #
In step 21, it is determined that the parts are out, and if there are any parts, the component mounting head 10 picks up the parts and mounts them onto the printed circuit board in the mounting process of step #22, and in the next step #23, all the components are mounted on the board. It is determined whether it has been installed, that is, whether it is the end of program (EOP) of the NC program. Once all the parts have been installed, the printed circuit board is carried in and out in step #24.

On the other hand, if it is determined in step #21 that the parts are out of stock, the other parts supply section is used in place of the component supply section currently in use. In other words, if a component runs out while one component supply section 12a is in use, it is determined in step #25 whether the component supply section 12b currently in preparation is ready, and after the preparation is completed, the other component supply section 12a is supplied. Since the parts supply section 12b is switched to the part supply section 12b and the parts supply section 12b is used thereafter, it is possible to continue operating even if the parts supply section 12a runs out of parts.

[0009]

However, the above configuration has the following two problems.

First, it is rare that both the left and right component supply sections are in an optimal state in terms of position accuracy and operational reliability such as vibration, and one may be inferior to the other. The problem is that the reliability of the equipment as a whole is limited by the parts supply section. In other words, having a plurality of component supply sections reduces the reliability of the entire facility.

[0011] Second, depending on the timing at which parts are out of stock, the left and right parts supply sections cannot necessarily operate continuously. That is, the number of identical components mounted on one printed circuit board is often one or two, and the number of packaging components per component is often almost the same.

For example, in FIG. 3, if there are 100 parts A,
101 pieces of component B and 102 pieces of component C are similarly set in component supply units 12a and 12b, and printed circuit board 1
Assuming that one point of each is mounted per sheet, 100
When the parts are produced, the remaining number of parts in the parts supply section 12a is part A.
is 0, component B is 1, and component C is 2. Part A is out of the component and is switched to the component supply section 12b, and component A, component B, and component C are all supplied from the component supply section 12b. During this period, only the out-of-part component A is replenished in the component supply section 12a (10 parts are supplied at once for component A).
0 points will be added. ).

Next, in the parts supply section 12b, 100
Since component A runs out after production, the supply of components is switched to the component supply section 12a again. However, at this time, the number of parts remaining in the parts supply section 12a is 100 parts A.
, component B is 1, component C is 2, and immediately after switching (1
Component B in the component supply section 12a runs out after production (after production), but since this is a very short period of time, the component supply section 12b cannot replenish component A in time. Therefore, both the left and right component supply sections 12a and 12b run out of components, causing the electronic component mounting apparatus to stop.
Continuous operation becomes impossible.

In view of the above-mentioned problems, the present invention makes it possible to improve the reliability of an automatic electronic component mounting machine and at the same time to improve the operating rate.

[0015]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a component mounting method in an electronic component automatic mounting apparatus that selectively uses a plurality of component supply sections. The present invention is characterized in that it includes a step of specifying, a step of determining whether the specified component supply section is being used, and a step of switching the component supply section to be used. Note that it is preferable that the mounting machine automatically determines the component supply section to be used preferentially based on production results.

[0016]

[Operation] In an electronic component automatic mounting apparatus that selectively uses a plurality of component supply sections, the present invention selects and specifies a component supply section that preferentially uses a highly reliable component supply section, and It is determined whether a component supply section is being used or not, and the component supply section to be used is appropriately switched, and the one with the highest accuracy and reliability among the plurality of component supply sections is intensively used. At this time, since the priority side supply section is used intensively, the parts in the other component supply section are not used much, making it difficult to cut the parts. Therefore, it is less likely that both component supply sections run out of components at the same time, and continuous operation can be performed smoothly.

Furthermore, by configuring the mounting machine to automatically determine and select the component supply section to be used preferentially based on production results, even if the reliability of the component supply section changes, , it is possible to always select and preferentially use the most reliable component supply section among a plurality of component supply sections.

[0018]

[Embodiment] The component mounting method of the present invention will be described with reference to an embodiment implemented in an electronic component automatic mounting machine shown in FIGS. 2 and 3. FIG. 1 is a flowchart showing one embodiment.

In the priority side designation step of step #1, the component supply section to be used with priority is designated in advance. Here, it is assumed that the component supply section 12a has high positional accuracy and component supply reliability, and is given priority.

When production is started, it is determined in step #2 whether there are any parts in the prioritized parts supply section 12a, and if the parts are out of stock, the parts are supplied from the spare parts supply section 12b in step #7. It is determined whether the preparation is completed or not, and after the preparation is completed, the switch is made to the spare parts supply section 12b in step #8.

If there is a component in the component supply section 12a at step #2, mounting is performed at step #3, and then step #2 is performed.
In step 4, check whether all parts are mounted on the board, that is, N
It is determined whether the C program is in an end-of-program (EOP) state or not, and component mounting continues.

Next, in step #5 at the end of component mounting for each printed circuit board, it is determined whether the component supply section currently in use is on the priority side, and if the priority side component supply section 12a is not in use. If so, the operation continues as it is, and the printed circuit board is carried in and out in step #6.

[0023] In step #5, the spare parts supply section 1
2b is being used, it is determined in step #9 whether the priority side parts supply section 12a has been replenished and ready, and if the preparation is in progress, it continues to use the spare parts supply section 12b. The component supply unit 12a that is used but has priority
If the preparation is completed, the priority side component supply section 12a is switched to the priority side component supply section 12a in step #10, and the priority side component supply section 12a is used from the next printed circuit board.

[0024] In the above configuration, among the plurality of component supply units, the one with the highest positional accuracy and component supply reliability is intensively used, so that the reliability of the mounting machine can be improved.

Furthermore, since the priority side supply section is used intensively, the parts in the other component supply section are not used much and parts shortages are less likely to occur, so both component supply sections may run out of components at the same time. As a result, continuous operation can be carried out smoothly as a result of this, the system can be operated without waiting for parts to be replenished.

[0026] Furthermore, in the mounting machine, the control unit 13 manages the production results, and it is possible to judge which component supply unit has high operational reliability. Even if the operator does not specify the priority side, the mounting machine can automatically determine the priority side based on production results and select a highly reliable component supply section. That is, Figure 1
In step #1, a configuration can be adopted in which the mounting machine determines the component supply section to be prioritized and performs the mounting process.

In this case, since step #1 is not performed based on the operator's judgment, the number of man-hours can be reduced, and at the same time, even if there is a change in the reliability of the parts supply section,
This is very suitable because it is possible to automatically determine the parts supply section that is always highly reliable and use it intensively.

[0028]

[Effects of the Invention] According to the present invention, it is possible to preferentially use a component supply section with high positional accuracy, and as a result, the operational reliability of an automatic electronic component mounting device can be improved, and at the same time, the continuous operation of the mounting machine can be improved. can be improved.

[Brief explanation of the drawing]

FIG. 1 is a flowchart of an embodiment of the present invention.

FIG. 2 is a perspective view of an electronic component automatic mounting machine.

FIG. 3 is a conceptual diagram of component supply in an electronic component automatic mounting machine.

FIG. 4 is a flowchart of conventional automatic electronic component mounting.

[Explanation of symbols]

12a Parts supply section 12b Parts supply section

Claims (2)

[Claims] Claim 1. A component mounting method in an electronic component automatic mounting apparatus that selectively uses a plurality of component supply units, comprising:
A component mounting system comprising the steps of specifying a component supply section to be used preferentially, determining whether the specified component supply section is being used, and switching the component supply section to be used. Method. 2. The component mounting method according to claim 1, wherein the mounting machine automatically determines the component supply section to be preferentially used based on production results.