JPH09160947A - Device for displaying selection condition of electronic component to be loaded on printed wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine each electronic component while always analyzing whether a selected electronic component is suitable or not and how much is the final price by calculating and displaying the cost required for the loading of components in each component identification(ID) name having the same function every time when a designer selects component ID name. SOLUTION: When the designer inputs a circuit diagram and the function information or the like of components based upon the circuit, a processor 1 stores the information in a function information storing part 4 and extracts a corresponding electronic component by referring to a component library stored in a component library storing part 5 based upon the component function information stored in the storing part 4. When there are plural candidates having the same function, component information including candidate information is stored in a component information storing part 6 and the component information stored in the storing part 6 is displayed on a display device 3 to allow an operator to select one of plural electric component information data having the same function. The processor 1 calculates the component price, loading price, loading preparation price, total price, commodity area, and so on.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a selection condition of an electronic component to be mounted on a printed wiring board for assisting the designer in selecting an electronic component to be mounted on the printed wiring board. Regarding

[0002]

2. Description of the Related Art A conventional printed wiring board on which electronic components are mounted is a printed wiring board design process, a printed wiring board manufacturing process, a mounting design process for designing a procedure for mounting electronic components on a printed wiring board, and an electronic component. Is manufactured on a printed wiring board through a mounting process.

In the process of designing the printed wiring board, a circuit diagram describing necessary functions is created, mounting components for realizing the circuit are selected, and necessary wiring patterns are designed.
In particular, when selecting the mounting components that realize the circuit, the designer considers the size of the mounting components and the unit price of the mounting components, and in order to design the printed wiring board that is as small as possible at a low cost, It is necessary to consider the conditions.
That is, since some electronic components have the same function and have different forms such as size and shape, it is necessary to specify the form and consider the size. In addition, even if the same electronic component has a different price depending on the manufacturer, it is necessary to consider the price of the electronic component.

In the manufacturing process of the printed wiring board, the printed wiring board is manufactured while forming a wiring pattern by printing or the like. In the mounting design process, a procedure for mounting electronic components on a printed wiring board is determined. At this time, the electronic components are
Since it is generally mounted by an automatic mounter, the automatic mounter to be used is decided according to the electronic component. This automatic mounting machine includes a model for mounting an insertion mounting type electronic component (hereinafter referred to as an inserter), a model for mounting a surface mounting type electronic component (hereinafter referred to as a mounter), and the like.

In the mounting step, electronic components are mounted on the printed wiring board according to the determined procedure.

[0006]

Generally, in a large electronic component, since the area occupied by the electronic component on the printed wiring board (hereinafter referred to as a mounting area) is large, the material cost of the printed wiring board alone is high, and the product is large. Becomes a big thing. Therefore, the designer is struggling to select an electronic component that is as cheap as possible and has a small mounting area so as to design a low-cost electronic component-mounted printed wiring board.

On the other hand, the mounting cost for mounting the electronic component on the printed wiring board depends on the mounting time per board and the preparation time. The preparation time is the time required for all preparations necessary for mounting. Therefore, if the automatic mounter is used, the mounting time of the electronic components on one board does not take much, but if the number of processes increases, it takes a lot of time for the preparatory work for setting the printed wiring board on the automatic mounter, There is a problem that it requires a lot of manpower.

Particularly, in the case of mounting a surface mount type electronic component, when mounting the electronic component on both sides of the printed wiring board, compared to mounting the electronic component on only one side of the printed wiring board, the mounter Since the number of times of use increases and the number of manufacturing processes increases, it is necessary to design the electronic components to be mounted on only one side as much as possible, which causes a problem that the degree of freedom in design decreases.

Further, conventionally, since the selection of the mounting components for realizing the circuit and the mounting design process are performed separately, even if the unit price of the electronic components to be mounted is grasped and designed, other costs are estimated. I couldn't. Therefore, when an electronic mounter such as an inserter or mounter is used to mount electronic components on a printed wiring board, costs such as the use cost of the automatic mounter are incurred. In addition, if it takes a long time to implement, the labor cost will increase accordingly. As described above, at the design stage of the printed wiring board, it is difficult to grasp the incidental cost, and it is difficult to grasp the manufacturing cost.

[0010]

Therefore, according to the present invention, when calculating the mounting cost such as identification name, function, mounting area, price, mounting time of electronic parts, mounting identification indicating surface mount type parts or insertion type parts, etc. It has a parts library that stores the necessary information for each type of electronic part, and inputs the function name of the electronic part to be mounted on the printed wiring board from the input section, and identifies the part having the input function name. Names are extracted from the component library, the cost required for mounting on the printed wiring board for each component identification name is calculated and displayed, and when a plurality of component identification names having the same function are displayed, Every time the designer selects the displayed component identification name, the above cost required for mounting is calculated and displayed for each component identification name of the same function, so that the designer can be provided with electronic component selection conditions. display To provide a display device of the selection criteria for electronic components to be mounted on a printed wiring board, wherein it has to so that.

It should be noted that the electronic component may be preferentially selected in accordance with the surface mount type component or the insertion type component. In addition, the information about the mounting time and the mounting cost for both manual mounting and automatic mounting is stored in the component library. Both of the cases may be calculated.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment FIG. 1 is a block configuration diagram of a display device for selecting conditions of electronic components to be mounted on a printed wiring board (hereinafter, abbreviated as a display device for selection conditions). 2 is an exemplary diagram of a storage format of a function information storage unit, FIG. 3 is an exemplary diagram of a storage format of a component library, and FIG. 4 is an exemplary diagram of a storage format of a component information storage unit.

Reference numeral 1 denotes a processing device, which controls the overall processing of the display device for selecting conditions, as will be described later.
The input device 2, the display device 3, the function information storage unit 4, the component library storage unit 5, and the component information storage unit 6 are connected. The input device 2 is a keyboard, a touch panel, or the like, and is used by a designer to appropriately input data.

As will be described later, the display device 3 is particularly for displaying information on electronic components selected according to a circuit diagram. In the function information storage unit 4, as shown in FIG. 2, based on a circuit diagram in which necessary functions are described,
The number of electronic circuits for realizing the function is stored for each function.

As shown in FIG. 3, the component library storage unit 5 stores, as an input component library, various kinds of information of all electronic components that can be used for designing, before starting this operation. . Various information of the input component library includes a function name, a component identification name, a component area, a mounting identification, a price, a mounting time, and the like. The parts information storage unit 6
As shown in FIG. 4, various information of electronic components selected as will be described later is stored as selected component information.
The selected part information includes the function name, part identification name, part area,
There are mounting identification, price, mounting cost, etc. The mounting cost will be described later.

Next, the design work will be described. First,
As the preparatory work for the design work, the following items are input from the input device 2 and stored in the respective storage units. That is, a circuit diagram describing necessary functions and a list of components extracted therefrom are input and stored in the function information storage unit 4. A parts library in which various kinds of information about the parts to be used is input is stored and stored in the parts library storage unit 5. When manufacturing a product, necessary manufacturing information such as mounting cost is input and stored in the component information storage unit 6.

The manufacturing information includes, for example, the average lot number, inserter preparation time, mounter preparation time, manual preparation time, inserter preparation cost, and the like. The average lot number is a planned number of printed wiring boards to be assembled at one time in the manufacturing stage. The inserter preparation time is an initial time required to prepare the machine for one work, and is defined independently of the average lot number. All preparation time required for mounting, which is proportional to the average number of lots, shall be added to the assembly time. For example, if it takes 15 minutes to restart the machine and 30 minutes to read the new NC data for the printed wiring board, the preparation time is 45 minutes.

The mounter preparation time is the initial time required to use the mounter, like the inserter preparation time. What is the manual preparation time?
This is also the same idea, and is the initial time required to perform the manual assembly work. Next, the calculation of the inserter preparation cost and the like will be described. The preparation time entered as described above is calculated by dividing the wages of the workers involved in the work and the depreciation cost of the related machines by the operating hours of the machines (this is called the hourly wage). The cost is calculated for each time, and the parts information storage unit 6
To memorize.

When the above calculations are organized, the following two formulas are obtained: (1) hourly wage of work = (hourly wage of worker + annual depreciation cost of machine) / annual operating time (2) work cost = working time * hourly wage . Now, the processing of this embodiment will be described.

FIG. 5 is a flowchart of the embodiment, and FIG.
FIG. 6 is a display example diagram of the embodiment. S1: As described above, the processor 1 stores the function information in the function information storage unit 4 when the designer inputs the circuit diagram and the function information of the parts based on the circuit, and moves the process to S2. S2: The processing device 1 refers to the component library stored in the component library storage unit 5 based on the function information of the component stored in the function information storage unit 4, and extracts the corresponding electronic component. At this time, there may be a plurality of relevant parts, so the following processing of S3 is performed.

S3: The processing device 1 judges that the electronic component is uniquely determined when there is only one corresponding electronic component, and extracts the extracted information in the format shown in FIG. Then, the process proceeds to S5. Further, when there are a plurality of candidates showing the same function, selection is necessary, so that information including the candidate is stored in the component information storage unit 6 in the format shown in FIG. 4, and the process proceeds to S4.

S4: The processing device 1 displays the component information stored in the component information storage section 6 in S3 on the display device 3,
The operator is made to select one of a plurality of pieces of electronic component information having the same function. That is, the operator selects an electronic component whose electronic component is not uniquely determined or an electronic component whose modification is desired. Then, the processing device 1 displays all the corresponding electronic component candidates in the component library storage unit 5 on the display device 3, and the operator selects one from them.
Then, when the operator operates the input device 2, the processing device 1
Moves the process to S5.

S5: The processing apparatus 1 calculates the component price, the mounting price, the mounting preparation price, the total price, the component area, etc.,
The result is stored in the component information storage unit 6, and the process proceeds to S6. Here, the parts price and the assembly price are obtained by the following equations. Parts price = Each parts price * Required quantity Assembly price = Each parts assembly cost * Required quantity The assembly cost is the price converted from the time required for assembly.

The assembly preparation price is calculated by the following procedure. (1) When there is at least one inserted part in the part information storage unit 6, the quotient of the inserter divided by the average number of lots input in advance is added. (2) When there is even one surface-mounted component in the component information storage unit 6, the mounting cost of the mounter divided by the previously entered average lot number is added.

The total price is a total of the above-mentioned component price, assembly price, and assembly preparation price, and is the final price per board. When the parts are confirmed in S4, the total price or the like is calculated by the above-described price calculation method based on the selected result. S6: The processing device 1 displays the result such as the total price calculated in S5 and the part information described with reference to FIG.
Displayed on the display device 3 as shown in FIG.

S7: The processing device 1 is operated by the operator using the input device 2
It waits for the operation of, and the processing of the following S8 is performed according to the operation. S8: If the operator inputs that the operator should change the parts and display again, the processing device 1 changes the parts, returns the process to S5, and repeats the work, so that the designer always operates. While considering what the final price will be, it is possible to determine the parts and design a cheaper printed wiring board. If there is no change in the part, the process ends.

According to the first embodiment, the designer repeats the work so that the selected electronic component is appropriate and the final price is always examined. A decision can be made and a cheaper printed wiring board can be easily designed.
That is, with respect to the selected electronic component, it is possible to simulate the cost that will actually occur in consideration of the mounting cost and the like. Therefore, the designer can use the simulated display to reduce the cost of printed wiring. You will be able to design the board.

Second Embodiment In the above-described first embodiment, a case has been described in which the operator makes a selection for each type of electronic component. As described below, when selecting the electronic components performed by the processing apparatus 1, certain components may be selected preferentially. For example, when the processing device 1 selects an electronic component, the surface mounting component is preferentially selected, and when the surface mounting component corresponding to the function name is uniquely determined, it is automatically set. To By this automatic selection, the designer can concentrate on the work to narrow down the cost of each uniquely determined component from among multiple electronic components with the same function, which must be selected. become able to. Also, in this way, when the surface mount components are automatically selected with priority, it is possible to perform the work of mounting the surface mount components on the printed wiring board without waiting for the selection of the insert type component. As a result, the effect of shortening the manufacturing time of the printed wiring board can be expected. As mentioned above, if you choose what kind of electronic component,
It is possible to simulate whether or not the cost of the printed wiring board will be low, it is possible to select electronic components more efficiently, and it becomes possible to assist in designing. It should be noted that instead of prioritizing the surface mount type component, the insertion type component can be prioritized to perform the same operation. The description is omitted.

Third Embodiment In the first and second embodiments, the surface mount type component uses the mounter, and the insertion type component uses the inserter. However, when the number of insertion parts is small, it may be cheaper to perform the insertion work manually. That is, (1) Inserter preparation man-hours / average lot number + inserter assembly man-hours,
(2) Manual assembly preparation man-hours / average lot number + total man-hour assembly man-hours generally means that inserter preparation man-hours> man-hour assembly preparation man-hours <man-hour assembly man-hours, Depending on the size of the lot, it is not known which of (1) and (2) is larger.

Therefore, when outputting the total cost (1)
It is desirable to calculate both of (2) and output the smaller one. In the embodiment, the display device for the selection condition is described as a dedicated device, but the above-mentioned means may be realized by programming in a general personal computer.

[0031]

As described above, according to the present invention, the designer repeats the work so that the electronic component selected is appropriate and the final price is constantly examined. The effect that the parts can be determined and a cheaper printed wiring board can be easily designed is obtained. That is, with respect to the selected electronic component, it is possible to simulate the cost that will actually occur in consideration of the mounting cost and the like. Therefore, the designer can use the simulated display to reduce the cost of printed wiring. The effect that the design of a board can be performed is acquired.

[Brief description of the drawings]

FIG. 1 is a block diagram of a selection condition display device.

FIG. 2 is an exemplary diagram of a storage format of a function information storage unit.

FIG. 3 is an exemplary diagram of a storage format of a parts library.

FIG. 4 is an exemplary diagram of a storage format of a component information storage unit.

FIG. 5 is a flowchart of an embodiment.

FIG. 6 is an exemplary display diagram of an embodiment.

[Explanation of symbols]

 1 Processing Device 2 Input Device 3 Display Device 4 Function Information Storage Unit 5 Component Library Storage Unit 6 Component Information Storage Unit

Claims (3)

[Claims] 1. Information necessary for calculating mounting cost such as identification name, function, mounting area, price, mounting time of electronic parts, mounting identification indicating surface mount type or insertion type part, and type of electronic part It has a parts library to store for each, and inputs the function name of the electronic part to be mounted on the printed wiring board from the input section, and extracts the part identification name with the input function name from the parts library. , Calculates and displays the cost for mounting on the printed wiring board for each component identification name, and if multiple component identification names with the same function are displayed, the designer displays the component identification name Each time is selected, the cost required for mounting is calculated for each component identification name of the same function and displayed, thereby displaying the selection condition of electronic components to the designer. The Display device selection condition of the electronic components to be mounted on cement wiring board. 2. The selection condition of an electronic component to be mounted on a printed wiring board according to claim 1, wherein the electronic component is selected with priority in accordance with the surface mounting type component or the insertion type component. Display device. 3. The component library according to claim 1, wherein information on the mounting time and the mounting cost both when mounting by hand and when mounting by an automatic mounting machine is stored in the component library, and the cost is calculated when the cost is calculated. A display device for selecting conditions of electronic components to be mounted on a printed wiring board, characterized in that both the case of manual operation and the case of automatic mounting machine are calculated.