Chemical Symbol Zn. Element No. 30 of the periodic system; atomic weight 65.38. Blue-white metal; when pure, malleable and ductile even at ordinary temperatures; melting point 419ºC (787ºF.), specific gravity 7.14. Can be electrodeposited; it is extensively used as a coating for steel, especially ...
A single-seater helicopter that is made by a 20-year-old farmer from central China with a pile of steel pipe, some Elm wood and a 150cc scooter engine. Using what he remembered from his high-school physics and information on the Internet, Wu Zhongyuan built the helicopter by carving its rotor ...
The coefficient of elasticity of stretching. Within the limits of elasticity, the ratio of the linear stress to the linear strain is termed the modulus of elasticity or Young's Modulus and may be written Young's Modulus, Modulus of Elasticity or E =(Stress/Strain). It is this property that ...
Evidence of plastic deformation in structural materials. Also called plastic flow or creep.
The percentage of material used that yields finished parts. In one molding cycle, this describes the percentage of the shot that fills the part cavities.
A piece of material that is secured in a fixture and machined into the final part. The workpiece is often cut from a larger piece of stock material and can be a sheet (blank), a standard extruded shape (solid bar, hollow tube, or shaped beam), a custom extrusion, or any prefabricated part such as a ...
The safe distance away from the workpiece at which the cutting tool can switch from the cutting feed rate to a rapid travel rate. This distance traveled before engaging the workpiece, as well as exiting from the workpiece, is included in the cut length.
The time required to load the workpiece into the machine and secure it to the fixture. The load time can depend on the size, weight, and complexity of the workpiece, as well as the type of fixture.
