Three-dimensional CAD system and part cost calculation system

A part cost calculation system for calculating a production cost of a part to be formed by a die, said part cost calculation system comprising:

• storing means for storing three-dimensional data about said part;
• and
• cost calculating means for calculating the cost of said part based on said three-dimensional data;
• wherein said three-dimensional data having drafting direction data established therein said cost calculating means calculates the cost of said part based on said three-dimensional data and on said drafting direction data.

A three-dimensional CAD system for generating three-dimensional data about a part to be formed by a die, said three-dimensional CAD system comprising:

• operating means for designating a drafting direction in a first predetermined
• direction and for varying the attitude of the part;
• and
• drafting direction data setting means for setting data about the designated drafting direction based on said three-dimensional data derived from said part in said first predetermined direction and based on said three-dimensional data derived from said part when the attitude is varied.

A part cost calculation system for calculating a production cost of a part to be formed by a die, said part cost calculation system comprising:

• storing means for storing three-dimensional data about said part;
• and
• cost calculating means for calculating the cost of said part based on said three-dimensional data;
• wherein said three-dimensional data is derived from a drafting direction data in a first predetermined direction and in a varied attitude for establishing therein said cost calculating means for calculating the cost of said part based on said three-dimensional data and on said drafting direction data in the first predetermined direction and in the varied attitude.