The device used to secure the workpiece in the machine. The type of fixture selected will depend upon the workpiece size and shape, as well as the operations to be performed. Sometimes, a custom fixture must be designed and constructed to accommodate the workpiece. Also, the fixture setup time and ...
The bend deduction, sometimes called the bend compensation, describes the amount a piece of material has been stretched by bending. The value equals the difference between the mold line lengths and the total flat length. The mold line lengths are the distances measured to the outside mold line and ...
A feature on a part that will not allow a mold that contains it to slide away along the parting direction. An undercut can be either a protrusion or a depression (hole or pocket) and is described as being either external or internal. An undercut requires an additional mold piece, such as a ...
The amount of power, typically measured in horsepower (hp) or kilowatts (kW), which is required by a machine to perform a cutting operation. This power can be calculated from the material removal rate and the specific cutting energy of the material. The cut power for all operations must be less ...
In an end milling operation, a small cusp of material, called a scallop, sometimes remains between adjacent cuts. Scallops along vertical walls can be removed through a profiling operation. Scallops on horizontal surfaces result from using a ball end mill and can be minimized by using a smaller ...
The hourly rate that is paid to any workers for a specific task in the manufacturing process, such as setup, machine operation, or post-processing. The labor rate does not include any costs associated with material, equipment, or overhead. If the number of workers is not specified, the labor rate ...
The cycle time of a process that results from no material or workpiece being used. The dry cycle time is typically a measure of machine performance that indicates the time for the machine to perform the actions necessary to manufacture a part, without the part actually being produced. This time ...
In molding and casting processes, the cooling time is the time required for the molten material to cool and solidify in the mold before the part is ejected. The theoretical cooling time can be calculated from material properties, but a correction factor is often applied to account for how the mold ...
