The sheet border, or stock border, refers to the space between the edge of a piece of sheet stock and the blanks or parts closest to the edge that will be cut. This border may be different along the length and width of the sheet. After all parts have been cut, the sheet border will remain as scrap ...
The roughness of a part's surface resulting from a manufacturing process. Surface roughness is typically measured as the arithmetic average (Ra) or root mean square (RMS) of the surface variations, measured in microinches or micrometers. A typical primary manufacturing process results in an Ra ...
In bending, the k-factor defines the location of the neutral axis in the material and is dependent upon several factors, such as the material, bending operation, bend angle, etc. The k-factor is calculated as the ratio of the distance of the neutral axis (measured from the inside bend surface) to ...
Regrind refers to scrap material that is reground into pellets and then mixed with unused material for reuse. The regrind ratio is the allowable amount of regrind relative to virgin material. The scrap used for regrind can be generated from the mold runners and defective parts. The cost to regrind ...
A turning operation in which a single-point tool moves radially, into the side of the workpiece, cutting a groove equal in width to the cutting tool. If the desired groove width is larger than the tool width, multiple adjacent grooves will be cut. A profiling cut can be performed to smooth the ...
The distance that the workpiece feeds into each tooth on a multi-point cutting tool as it rotates. This distance, also called the chip load per tooth, describes the size of the material chip that each tooth will cut. The feed per tooth, measured in inches per tooth (IPT), multiplied by the number ...
An additional mold piece that is used to form threaded features (internal or external). External threads on a feature perpendicular to the parting direction can be formed by the two mold halves. However, other external threads and all internal threads require an unscrewing device. The device is ...
Projected holes are through-holes that project empty space onto the X-Y plane and therefore appear as gaps in the projected area of the part. If the area projected by these holes is very small compared to that of the part, it can be ignored (Servo lever). For holes that project a larger area ...
