Commonly asked Pro-e Interview questions...Part 1

1. What is bend allowance?
   Bend allowance is a measure of how much extra material is required to accommodate a bend in sheet metal. This is a function of the bend angle, bend radius, thickness of the material, and a variable called the K-factor. Bend allowances vary based on the angle of the bend, the type and thickness of the material, and the method used to create the bend. Calculating the bend allowance is necessary to create a finished product of the correct size.
   
   
   
   
2. Bend allowance formula?
   The bend allowance formula for sheet metal is as follows. (0.0173 x R + 0.0078 x T) x N= Bend Allowance. In the formula, R= desired radius of bend, T= Thickness of material, and N= Number of degrees in the bend. Using this formula will allow precise bends of sheet metal for various applications.
   
   
3. What is restructuring?
   The assembly restructure tool allows you to reorder your assembly structure between main assembly and sub assemblies
   
   
   
   
4. What is GD & T, why it is used?
   GD&T stands for Geometric Dimensioning and Tolerances, as defined by ASME Y14.5M-1994.
   An International Language
   Provides Uniformity 
   
   
5. What are the different types of tolerances we use on drawings?
   Limit Tolerances – (12.75/12.25 )
   Plus/Minus Tolerances
   – Unilateral Tolerances - (12.00 + or - xxx)
   – Bilateral Tolerances - (12.00 +xxx/- xxx)
   
   
   
   
6. Classification of FITS and its application?
   – Clearance fit
       • The parts are toleranced such that the largest shaft is 
          smaller than the smallest hole
       • The allowance is positive and greater than zero
   – Interference fit
       • The max. clearance is always negative
       • The parts must always be forced together
   – Transition fit
        • The parts are toleranced such that the allowance is 
           negative and the max. clearance is positive
        • The parts may be loose or forced together
   
   
   

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