Introduction to Sheet Metalworking

<p>It influences the depth of drawing achievable. (A)</p> Signup and view all the answers

<p>The uniformity of the material thickness. (C)</p> Signup and view all the answers

<p>It combines stretching and local heating to form complex shapes. (C)</p> Signup and view all the answers

<p>By calculating the area of the desired shape plus an allowance. (A)</p> Signup and view all the answers

<p>Producing complex curves for aircraft components. (D)</p> Signup and view all the answers

<p>To form the sheet into convex or concave shapes (A)</p> Signup and view all the answers

<p>Distance between the punch and die (A)</p> Signup and view all the answers

<p>Blanking punch diameter = Db - 2c (D)</p> Signup and view all the answers

<p>The surface where no longitudinal stress occurs during bending (B)</p> Signup and view all the answers

<p>4% to 8% (B)</p> Signup and view all the answers

<p>Metal is pinched leading to burrs (C)</p> Signup and view all the answers

<p>To provide a desired bend shape (B)</p> Signup and view all the answers

<p>The recovery of the metal to its original shape after bending (C)</p> Signup and view all the answers

<p>Metal tends to stretch (B)</p> Signup and view all the answers

<p>1100S aluminum alloys (C)</p> Signup and view all the answers

<p>Blanking separates a piece from stock, while punching removes a piece leaving scrap. (B)</p> Signup and view all the answers

<p>Bending angle (B)</p> Signup and view all the answers

<p>To allow the blank or slug to drop through the die (C)</p> Signup and view all the answers

<p>2.0 (D)</p> Signup and view all the answers

<p>Greater than 1% (D)</p> Signup and view all the answers

<p>Spherical objects (C)</p> Signup and view all the answers

<p>To make wall thickness uniform (C)</p> Signup and view all the answers

<p>Volume of the starting sheet metal blank equal to final product volume (A)</p> Signup and view all the answers

<p>Embossing (B)</p> Signup and view all the answers

<p>Low tooling cost and flexibility (A)</p> Signup and view all the answers

<p>It is calculated as 1.1 times the stock thickness. (A)</p> Signup and view all the answers

<p>Higher tendency for wrinkling (B)</p> Signup and view all the answers

<p>Indents in sheet metal (C)</p> Signup and view all the answers

<p>The proportionate change in diameter (D)</p> Signup and view all the answers

<p>Gap frame (A)</p> Signup and view all the answers

<p>Thickness of the stock must be uniform (C)</p> Signup and view all the answers

A sheet metal cutting operation using two cutting edges along a straight line.

Sheet metal cutting to separate a desired piece (blank) from surrounding stock.

Sheet metal cutting where the cut piece (slug) is scrap, and the remaining stock is desired.

The distance between the punch and die. Typically 4-8% of stock thickness.

A factor determined by metal type, used to calculate clearance.

Punch diameter = blank diameter - 2 * clearance; Die diameter = blank diameter

A small angle (0.25-1.5 degrees) allowing the slug/blank to drop through the die.

Calculated as Force = Shear strength * stock thickness * length of cut edge.

Straining sheet metal around an axis to get a permanent bend.

Bending with a V-shaped die, used for low volume.

Bending with a wiping die, used for high volume.

The slight recovery of the bent part after the forming tool is removed.

A formula to estimate the length of the material required to make a bend.

Estimated by Force = (K * tensile strength * width * thickness^2) / diameter

The maximum force a press brake can apply, usually measured in kN (kilonewtons) or tons.

The length of the working surface of a press brake, where sheet metal is placed for bending.

A type of press that uses a rotating turret to hold various tools, allowing for different punching and forming operations.

A type of press with a rectangular frame that provides stability and rigidity for bending.

A press that uses hydraulic pressure to power the ram, providing a powerful and controllable force.

A press that uses mechanical gearing to convert motor rotation to linear ram motion.

A sheet metal forming process that stretches and bends metal simultaneously, creating complex shapes.

Specific metal forming methods that are not typically performed on presses, such as stretch forming, roll bending, spinning and high-energy-rate forming.

The constant for V-bending, equal to 1.33

The constant for edge bending, equal to 0.33

The space between the punch and die, approximately 10% greater than the sheet metal thickness (t).

The ratio of blank diameter (Db) to punch diameter (Dp) in a cylindrical shape, indicating the severity of the drawing operation.

The ratio of the difference between the blank diameter (Db) and punch diameter (Dp) to the blank diameter (Db) in a cylindrical shape.

The ratio of the sheet metal thickness (t) to the blank diameter (Db).

Calculating the starting blank diameter (Db) needed for the final drawn shape to be correct.

A sheet metal forming process used to make the wall thickness of a cylindrical cup more uniform, like in beverage cans.

Creating indentations or raised features in sheet metal, like lettering or strengthening ribs.

A sheet metal forming process using a low-cost form block and flexible rubber pad.

Custom-designed metal tools used in sheet metal processes.

A type of stamping die with multiple stages, used for complex parts.

The structure that holds and operates the stamping tools.

A stamping press frame with a 'C' shape.