JP7209673B2 - Component mounting line - Google Patents

Description

The present invention relates to a component mounting line for mounting a plurality of components on a substrate.

When mounting small, medium, and large electronic components on a substrate, the small and medium-sized components are mounted using a component mounting machine, and the large components are manually inserted by workers in the post-process. On the other hand, there are component mounters that insert large components, but they are generally more expensive than component mounters that mount small and medium-sized components, and the time (takt) to mount one component is slower. For this reason, even in the production of mounting/inserting medium-sized and large-sized parts, there is a tendency to rely on manual work in consideration of labor costs.

Japanese Patent Application Laid-Open No. 2001-111295

Problem to be solved by the invention

To provide a component mounting line which does not rely on manpower and is economically profitable even when inserting a large component.

In order to solve the above problems, the component mounting line is characterized by comprising a mounting machine for mounting small and medium-sized components and a mounting machine for inserting large-sized components.

As a result, the insertion of large parts, which has conventionally been done manually, can be done by using a mounting machine for inserting large parts. Moreover, by having a placement machine that can place medium-sized components at a higher speed than a placement machine that can insert large components, the component placement speed for the entire component mounting line is increased, making it more economical than the manual method. It will be a profitable line.

1 is a perspective view of one embodiment of the present invention; FIG. 1 is a block diagram of one embodiment of the present invention; FIG.

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, in the component mounting line 1, a first mounting machine 3 and a second mounting machine 5 are connected via a conveyor (not shown). A plurality of first feeders 7 for supplying small-sized parts and a plurality of second feeders 9 for supplying medium-sized parts are mounted on a mounting table (not shown) in the first mounter 3 . In the second mounting machine 5, a plurality of third feeders 11 for supplying large-sized parts and a plurality of fourth feeders 13 for supplying medium-sized parts are attached to a mounting table (not shown).

The first feeder 7 is a tape feeder that feeds small electronic components for surface mounting, such as capacitors and resistors, which are stored in a tape. The second feeder 9 and the fourth feeder 13 are, for example, stick feeders that supply medium-sized electronic components such as lead components, SOICs, etc. contained in a tape. The third feeder 11 is also a tape feeder that supplies large electronic components stored in tape. The width size of each feeder is standardized, and it is possible to increase the number of second feeders 9 by reducing the number of first feeders 7 attached to the mounting table of the first placement machine 3, or vice versa. . The same applies to the second mounting machine 5 as well. Two fourth feeders 13 can be exchanged for one third feeder 11 .

In addition to tape feeders and stick feeders, devices for supplying components include tray feeders, radial tape feeders, axial tape feeders, and bowl feeders.

A mounting head (not shown) is provided in the first mounting machine 3, and a tool appropriately selected is attached to the tip of the part picked up by suction or gripping. The tool picks up small and medium-sized parts supplied from the first feeder 7 and the second feeder 9 . This head surface-mounts or inserts a small-sized component and a medium-sized component at a predetermined position on a substrate conveyed from the substrate input port 15 of the first mounter 3 . The board on which components have been mounted by the first mounting machine 3 is transported to the second mounting machine 5 by a conveyor (not shown). The second placement machine 5 also has a placement head (not shown), and selects a tool to be attached to the tip according to the component to be picked up. Then, this mounting head picks up large-sized and medium-sized components supplied from the third feeder 11 and the fourth feeder 13, and surface-mounts or insert.

Here, the following table shows the approximate size, part type, mounting tool, and mounting method for the small, medium, and large sizes.

Since the first mounting machine 3 has a lower component height than large-sized parts and handles light parts, the vertical movement of the head is small and light parts are handled. can be worn.

Next, I would like to compare the economic viability of this embodiment with the case where the second mounter 5 is replaced by manual work. The following table shows the cost and the number of parts that can be mounted per unit time in each case.

Comparing the component mounting line of this embodiment and the number of component mounting per unit cost when using manual labor instead of the second mounting machine, and assuming that the former is higher, the formula is as follows. can express

When formula (1) is expanded for the cost B of the second placement machine,

となる。 In equation (2), if b=c, that is, if the second placement machine and the number of parts that can be placed per unit time by human hands are the same, then equation (2) is:

becomes.

That is, the above assumption does not hold unless the cost of the second mounter is lower than the cost of the manpower. However, since the number of parts that can be mounted per unit time by machine is usually larger than that by manpower, the relationship b>c holds. That is, even if the cost B of the second placement machine is slightly higher than the labor cost C, the equation (1) holds. That is, the number of parts to be mounted per unit cost is greater in the part mounting line consisting of the first mounting machine 3 and the second mounting machine 5 than in the line using the first mounting machine 3 and manpower.

In general, when such a component mounting line is performed manually, two shifts are performed, and the depreciation of the equipment is estimated in two to three years. personnel costs.

Next, in equation (2), if A, C, and c other than a and b are fixed values, it can be understood that the value of the right side increases when b is increased rather than when a is increased. . That is, even if the cost B of the second mounter 5 is large, the formula (1) holds. The number of medium-sized and small-sized components mounted on a generally produced electronic component board is greater than the number of large-sized components. Therefore, when the number of large-sized components to be mounted by the second mounting machine 5 is small, mounting the medium-sized components that were mounted by the first mounting machine 3 by the second mounting machine 5 increases b.

FIG. 2 shows a block diagram of this embodiment. The first mounting machine 3 and the second mounting machine 5 are connected to the host computer 16 . The host computer 16 distributes the large, medium, and small components to be mounted and inserted to the first mounting machine 3 and the second mounting machine 5 according to the boards to be produced. The overall production time can be shortened by balancing the time for finishing mounting/insertion by the first mounting machine 3 and the time for finishing mounting/inserting by the second mounting machine 5 as much as possible. In addition, the mounting/inserting time of each component varies depending on the component to be mounted/mounted, the component mounting/inserting position, and the component picking position. Simulate an array of feeders on the street and choose the feeder array that gives the shortest overall mounting/mounting time.

In this embodiment, the second feeder 9 and the fourth feeder 13 that supply medium-sized parts can also be mounted on the first mounting machine 3 and the second mounting machine 5. The second feeder 9 and the fourth feeder 13 are attached to the mounting bases of the first mounting machine 3 and the second mounting machine 5, respectively. In this manner, the second feeder 9 and the fourth feeder 13 are arranged as the first mounting machine 3 or the second mounting machine 3 so as to shorten the production time depending on the type and number of parts to be mounted on the board. It is assigned to machine 5 respectively. Thus, medium-sized parts can be mounted/inserted by either the first mounting machine 3 or the second mounting machine 5. FIG.

The host computer 16 can record which components have been mounted/inserted for each board produced. Therefore, when a defect is found in a particular part, it is possible to trace which board the part was mounted/inserted on. This embodiment is more effective for vehicle-mounted vehicles, smart meters, and the like, which require recalls and the like.

In this embodiment, stick feeders are used as the second and fourth feeders, but tape feeders or tray feeders may also be used. Also, although the first mounting machine 3 and the second mounting machine 5 are arranged in this order, they may be reversed, and the number of each may be two or more.

1: Component Mounting Line 3: First Mounting Machine 5: Second Mounting Machine 7: First Feeder 9: Second Feeder 11: Third Feeder 13: Fourth Feeder 15: Substrate Input Port 17: Host Computer

Claims (2)

multiple standardized width size feeders for feeding small parts and tools ;
a plurality of stick feeders that supply medium-sized parts that are larger in size than the small-sized parts, unlike the feeders whose widths are standardized ;
A plurality of large-sized component feeding devices that supply large-sized components having a component height of more than 25 mm that is larger than the medium-sized components, unlike the feeder and stick feeder with standardized width sizes ;
Equipped with a first conveyor, a mounting table for mounting the feeder with the standardized width and the stick feeder, and surface mounting or inserting the small component and the medium-sized component at a predetermined position on the substrate by suction or gripping of the tool. a first mounting machine to
A second conveyor, a mounting table for mounting the stick feeder and the large-sized component supply device are provided, and the medium-sized component is surface-mounted or inserted into a predetermined position of the board conveyed from the first mounting machine, and further the a second mounting machine for inserting a large-sized component into a predetermined position on the substrate;
a computer for simulating the number of stick feeders attached to each mounting machine so as to shorten the production time by the first mounting machine and the second mounting machine;
The stick feeder is attached to the mounting tables of the first mounting machine and the second mounting machine on one side of an area divided by a conveyor line formed by the first conveyor and the second conveyor. Parts mounting line. 2. The component mounting line according to claim 1, wherein the small component has a component height of up to 3 mm, and the medium component has a component height of 3 mm to 25 mm.

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