JP2002254263A - System for evaluating workability of assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for evaluating the workability of assembly, which enables the workability of the assembly to be more simply evaluated than a conventional method. SOLUTION: In an evaluation of work for assembling a product composed of a component and an assembly or a unit in an artificially conveyable level, a value, which is obtained by multiplying the total number of the components and the like by a prescribed time, is taken as a target assembly time for the assembly of the product, a ratio between a real assembly time required for the assembly of the product and the target assembly time is determined as a coefficient αof assemblability, and the workability of the assembly of the product is evaluated according to the coefficient α.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a system for evaluating the workability of assembling various products.

[0002]

2. Description of the Related Art In an assembling process in the manufacturing industry, it is important to evaluate an index for determining costs and staffing and its workability.・ It is important to present indicators. From such a viewpoint, the IE (Ind
Assemblability evaluation based on “assembly posture” and “assembly order” based on analysis through assembling work such as “usual engineering” and DFA (Design fo
r Assembly) has been proposed.

[0003]

However, the software for the evaluation method is commercially available but expensive. In addition, the evaluation method is proposed as a tool for engineers to evaluate in order in the design stage, it is difficult to understand because it is an approach that actually requires that the steps be taken with professional eyes, or
The problem is that the concept can be understood, but it is time-consuming and impractical.

On the other hand, for example, Japanese Patent Laid-Open No. 2000-11
As shown in Japanese Patent No. 7568, when allocating work standard man-hours to parts in parts table data, the work name and the work standard man-hours required for assembling the parts having the part names into the system Is proposed in the form of a table in advance, and for the input product name data, the work process man-hour data is automatically assigned to the corresponding parts by referring to the table data. Have been.

However, in the assembling process design system disclosed in the above-mentioned publication, it is necessary to take into account various factors including the work content and the weight of parts, which is very complicated.
This imposes a considerable burden on the design side, and there is an inconvenience that the original work of the designer may be affected.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned matters, and has as its object to provide an assembly workability evaluation system which can evaluate assembly workability very easily as compared with the conventional method. It is to be.

[0007]

In order to achieve the above object, an assembly workability evaluation system according to the present invention evaluates the work of assembling a product composed of parts or assemblies or units of a level that can be transported artificially. A target assembly time for assembling the product is obtained by multiplying the total number of the parts and the like by a predetermined time, and a ratio of an actual assembly time required for assembling the product to the target assembly time is an assemblability coefficient. And evaluating the assembly workability of the product based on the assemblability coefficient.

[0008] The designer designs the plan in his head while realizing it using a visible design tool such as a three-dimensional CAD system, according to his / her skill level. Then, the design is performed without performing the above-mentioned restrictions and time-consuming procedures, but the design can be performed while always recognizing the target assembly time.
That is, a plurality of parts or assemblies (ASSY, Asemb
ly) or a unit (hereinafter, referred to as a part, etc.), the target assembly time of the product is obtained by multiplying the total number of these parts by a predetermined time, for example, one minute. In order to reduce the number of man-hours for assembling a product, it is necessary to reduce the number of parts and the like and eliminate parts that are difficult to work. Therefore, according to the assembly workability evaluation system of the present invention,
You can approach the initial goal in a short time.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of the configuration of an assembly workability evaluation system when a certain product is put on a production line. Before starting full-scale production of the product, a prototype (PR) 1 is performed. In this PR1, the performance of the prototype is checked by conducting electrical, mechanical or chemical tests and inspections, and verification of the required number of assembly steps is performed.

The prototype is manufactured on a trial basis based on the design drawings (production drawings) created by the design side 2. For the prototype, the number of assembly steps is estimated in advance in the personal computer 3, and a target assembly time is set. Also, a PC / POP system (POP; Poi
nt of Production, production point information) 4
Actual man-hour measurement is performed. Further, the personal computer database 5 stores a database 5A of design improvement cases, a database 5B of design improvement proposals, and a database 5C by product category, and is provided to the PR1.

Although there is little difference from the work flow in the conventional assembly workability evaluation system up to here, the assembly workability evaluation system of the present invention uses a plurality of parts of a level which can be transported artificially. When evaluating the work of assembling a product, the total number of the parts and the like is multiplied by a predetermined time, for example, one minute, to obtain a target assembling time for assembling the product. The point that the ratio of the assembling time to the target assembling time is obtained as an assemblability coefficient, and the assembling workability of the product is evaluated based on the assemblability coefficient is significantly different from the conventional assembling workability evaluation system.

That is, parts and the like having a size and weight that can be carried and assembled by an operator with their own hands (at a level that can be artificially transported) can be used. Are counted as one without distinguishing between them, and each of these parts and the like is assembled with each other, and a target value of an assembling time for combining them is (number of parts and the like) × 1 minute. . For example, when the total number of parts and the like is 50, the target assembling time is 50 minutes, and when the number is 200, it is estimated to be 200 minutes.

The assembling workability (design skill) of the product is a value obtained by dividing the time required for actually assembling the product (actual assembling time) by the target assembling time (assembly efficiency). (Coefficient) α. That is, assemblability coefficient α = (actual assembly time) / (target assembly time).

The assemblability coefficient α is, for example,
The size is about 0.5 to 1.5. Then, it is determined whether the magnitude of the assemblability coefficient α is smaller than 1 (or not less than 1) (reference numeral 6 in the drawing), and when α <1, it is determined that “the assembling workability is good” and α When ≧ 1, it is evaluated that the assembly workability is not good and “the degree of improvement is large”. When α <1, that is, “good assembly workability”
If so, the product is shifted to actual production as it is (reference numeral 6 in the figure). Various data obtained in this production are appropriately stored in the product classification-specific database 5C. When α ≧ 1, that is, when “improvement degree is large”, the result (data) is fed back to the design side (reference numeral 8 in the figure) and used for reference for the next design improvement. It is.

[0015] As described above, the assembly workability evaluation system of the present invention is capable of assembling small parts such as screws and connectors constituting a product and all parts such as assemblies and units which are relatively bulky. The focus is on the fact that humans are involved in handling such items, and by counting all of these (parts, assemblies, units) as one and the same unit, the assembly workability can be easily evaluated. It was.

Particularly, in the above embodiment, when calculating the target value of the assembling time, it is easy to calculate the target value by setting (the number of parts, etc.) × 1 minute.

[0017]

As described above, the assembly workability evaluation system of the present invention does not take into account various factors as in the conventional method, but the total of parts, assemblies and units constituting the product. The total assembly number is assumed to be equal to 1, and the total assembly number multiplied by a predetermined time is set as the target assembly time. Therefore, even when a new product is developed or improved, The target assembling time can be easily obtained, and the design can be performed in consideration of the assembling workability. And according to this invention,
The evaluation of assembly workability can be performed very easily.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing an example of a configuration of an assembly workability evaluation system of the present invention.

[Explanation of symbols]

 α: Assemblability coefficient

Claims (1)

[Claims] When evaluating the operation of assembling a product composed of parts or assemblies or units of a level which can be transported artificially, a product obtained by multiplying the total number of the parts and the like by a predetermined time is used for assembling the product. Target assembly time
Determining a ratio of an actual assembling time required for assembling the product to the target assembling time as an assemblability coefficient, and evaluating the assembling workability of the product based on the assemblability coefficient; Evaluation system.