Flashcards
Machine Fundamentals CH14
Flashcards do conjunto (21)
- 1ChipbreakerA small groove cut into the face of a lathe tool near the cutting edge to break chips into small pieces.
- 2Compound restA slide in the lathe located above a base cross-slide. The upper slide can be revolved to any required angular position.
- 3Cross-slideA part of a machine tool that permits the carriage to make transverse tool movements.
- 4Cutting SpeedIn reference to milling machines, the distance, measured in feet or meters, that a point (tooth) on the cutter's circumference will move in one minute. In reference to lathes, the distance the work moves past the cutting tool, expressed in feet per minute (fpm) or meters per minute (mpm). Measuring is done on the circumference of the work. In reference to drilling machines, it is the speed at which the cutting tool rotates.
- 5Depth of CutThe distance the cutter is fed into the work surface. The depth of cut varies greatly with lathe condition, material hardness, speed, feed, amount of material to be removed, and whether it is to be a roughing or finishing cut.
- 6FacingIn the lathe work, cutting across the end of a workpiece to create a flat surface.
- 7FeedThe rate at which work moves into the cutter or the cutter moves into the work.
- 8GroovingThe turning operation of cutting a groove or recess into a workpiece to terminate a thread or provide adequate clearance for mating parts.
- 9HeadstockOn a lathe, the structure that contains the spindle to which various work-holding attachments are fitted.
- 10Indexable insert cutting toolInsertable piece that contains multiple cutting edges for a cutting tool. Widely used for turning and milling operations, the inserts are manufactured in a number of shapes and sizes for different turning geometries. As an edge dulls, the next edge is rotated into position until all of its edges are dulled; the insert is then discarded.
- 11Lathe CenterA pointed work-holding device used to accurately align the workpiece along its axis.
- 12Lathe DogA device that clamps to one end of the workpiece and drives it so that it can machined between centers.
- 13PartingThe turning operation of cutting off material after it has been machined. This is one of the more difficult operations performed on the lathe.
- 14Plain TurningTurning in which the entire length of the piece is machined to a specific diameter.
- 15Roughing CutDeep cut made to remove considerable material from a workpiece in a single pass.
- 16Single-point Cutting toolA cutting tool with one face and one cutting edge.
- 17SpindleOn a lathe, the structure the receives tools, attachments, or the workpiece, revolves in heavy-duty bearings, and is rotated by belts, gears, or a combination of the two.
- 18SwingThe largest diameter that can be turned over the ways of a lathe. Along with the length of the bed, the swing determines the size of the lathe.
- 19TailstockA movable lathe fixture that mounts on ways to support the workpiece between centers. It can be fitted with tools for drilling, reaming, and threading.
- 20Tool PostMounts the cutting tool on the carriage of a lathe.
- 21WaysThe flat or V-shaped bearing surface that aligns and guides the movable part of a lathe.