Theoretically exact planes, lines or points from which other features are located on design drawings.
Debur
To remove the sharp, knife-like edge from parts.
Dedicated Tooling
Commonly referred to as hard tooling is tooling made to produce a specific part.
Delamination
Defective surface condition where scale, slag or other impurities not removed during mill processing affect the surface of the sheet.
Depth Stop
See Back Gauge.
Die
Tool with a void or cavity which is precisely fitted to a Punch used to shear or form sheet metal parts.
Die Angle
Forming term used to denote the inside angle of a matched punch and die set.
Die Clearance
Amount of space between the punch and die opening per side.
Die Cushion
Large pressurized cylinder, generally housed beneath the bed of a press which is used to apply upward pressure to the lower die.
Die Cut Inserts
Packaging elements, generally of cardboard, which are machine blanked to a specific shape in order to precisely fit a part contour.
Die Marks
Scratches, scrub marks, indentations, galling or burnishing of sheet metal workpieces by tooling.
Dimension
A measurement describing size and/or appearance of a part feature.
Dip Brazing
Metal bonding of parts by molten bath immersion.
Discoloration
l Staining. 2 Changing or darkening in color from the standard or original.
Diskette
A flexible plastic disk coated with magnetic oxide and used for storing electronic data.
DOS
Acronym for Disk Operating System. A computer operating system.
Double Action
Press utilizing two moving elements.
Double Burned
A condition that may occur on a laser wherein the laser essentially produces a feature twice destroying the part's edge and causing out of dimension condition.
Download
To receive data from another computer.
Drain Holes
Holes placed in the part that are nonfunctional except to allow for drainage.
Draw
A term used interchangeably with tempering in the heat treating process.
Draw Ring
Holding device in a die to control material flow and wrinkling during forming.
Drawing
1 Engineering document depicting a part or assembly. 2 In metal forming, the stretching or compressing of a sheet metal part into a die by a punch to create a 3-dimensional part.
Dry Film Thickness
Thickness of an applied coating after drying or curing.
Dry Spray
See Oversprays.
D-Size
A common drawing size, 22 x 34.
Ductility
Ability of a material to be bent or otherwise formed without fracture.