Die Cost vs. Die Price; Prediction vs. Reality

(disclosure I work as the Product Manager for a Sheet Metal Stamping Die Cost calculation product that is commercially available) I have been having some really enlightening discussions with people lately about the applicability of this application to there business and what our product can/can’t do. It goes a little something like this. act 1: [...]

Stirring the pot

So I wonder that has caused this minor uptick in hits: bombastic controversy? Name calling? content? The magic of MetaTags? shameless self promotion on other sites? Pornbots? In any case it has been entertaining having dialog with others who come across the content whether through the: SME-Forming and Fabricating Technical Community LinkedIn- SME Forming and [...]

My press runs at 42 strokes per minute will your simulation take that into account?

It was bound to come up sooner or later, and I even surprised myself by optimistically leaving of my list of rants and potential future blogs. But really can commercial simulation really predict the effect of press speed variation on the forming of parts? yes and no (or more appropo no, but kind of) Funny [...]

What is Compensation?

Springback compensation is one of the hottest topics out there in the stamping field. Whether we are looking at Simulation solutions, Scanning and reverse engineering solutions, or plain old fashioned dieology. In all these cases compensation is a geomtry adjustment applied to the tool to accomodate the elastic deformation that prevents attainment of the desired [...]

Putting together the pieces (springback)

Now with the Springback 101 under our belt let’s put it all together to understand why springback is not so EASY to predict (for ANYBODY). Springback is a variability problem, you cannot over engineer for it. Stamping is a variable environment, everyday the incoming material changes (a little), the lube changes (a little), the press [...]

So why is Springback hard to predict, if the calculation is so easy?

So I delved into some shaky territory last week/month/post when I proposed that calculation of springback is an easy formula. Simply take the stress at the time of forming and divide by modulus of elasticity and you will get a result of the elastic strain at the time of forming. EASY PEASY-Mac and Cheesy. Bust [...]