Page 42 - MetalForming March 2014

Ready; Set; Lean
The Cost of Variety
Low
High
Internal Variety Cost
perform engineering tasks, generate CNC code and provide the paperwork needed to produce any one of millions of possible product designs, all within seconds. And, having established the design logic system, anyone in the plant can be empowered to design the product, even those unfamiliar with the CAD environment.
Companies benefitting from elec- tronic design automation are those that: • Design and manufacture kits of
parts.
• Thrive on providing custom-engi-
neered solutions.
• Have a large amount of work in
process.
• Want to increase responsiveness to
market demands.
• Struggle with the on-time delivery. • Frequently change designs.
• Need to generate more accurate
sales quotes and proposals for custom product.
• Require consistent application of design rules across the board.
Automating the design process requires a generic CAD solid model or parametrically written program, created so that design rules can be applied. Often, small changes can be made to exist- ing models to pre- pare them for automation.
Low
Mass Production using Inflexible Equipment
Flexible Equipment
Market Variety
High
40
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A standard design
rule is an instruction or mathematical formula that manipulates the CAD model or parametric programming fea- ture based on certain conditions. Such a rule might say, for example, “The center of this hole always will be locat- ed 1 in. from this edge, but the diame- ter may change. And, if the part is smaller than 6 in. the hole is deleted.”
The design package eliminates the inefficiencies of repetitive tasks and
calculations by allowing an engineer to define the design intent, and by let- ting the automated design software parametrically manipulate the model and its features.
The Wasteful Costs of Batch and Queue
If you view your manufacturing unit as an internal supply chain, with goods flowing through the process in a life-or-
Standard Frame Conveyors
Fig. 1
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