IME 1143 Manufacturing Midterm Study Guide

Vocabulary practice flashcards for the IME 1143 Manufacturing midterm covering lathe/mill anatomy, cutting mechanics, holemaking, abrasive and nontraditional machining, metrology, and production planning.

Headstock

The machine housing at the spindle end of a lathe that contains the drive transmission and rotates the spindle.

Spindle

The motor-driven rotating shaft within the headstock that drives the chuck and workpiece.

Three-Jaw Chuck

A self-centering workholding device mounted on the lathe spindle where all jaws move together simultaneously to hold round stock.

Four-Jaw Chuck

A lathe workholding device with independently adjustable jaws used for holding irregular or eccentric workpieces.

Tool Post

A clamp mounted above the compound rest on a lathe that secures the single-point cutting tool.

Carriage

The complete assembly that travels along the lathe bed ways to feed the cutting tool parallel to the spindle axis.

Cross-Slide

The slide on a lathe carriage that moves the cutting tool radially across the spindle axis to set depth of cut or perform facing.

Compound Rest

An angularly adjustable slide mounted on top of the cross-slide used to feed the tool at an angle to turn tapers.

Tailstock

A movable assembly positioned opposite the headstock that supports the free end of a long workpiece or holds axial tools such as drills.

Tailstock Quill

The extendable sleeve within the tailstock that advances or retracts a center or drill axially.

Lathe Bed / Ways

The heavy, accurately aligned foundation and guiding tracks that support and align the headstock, carriage, and tailstock.

Turning

A machining operation in which a cylindrical workpiece rotates while a single-point cutting tool feeds parallel to the axis to reduce its outside diameter.

Facing

A lathe operation where the cutting tool feeds radially across the end of a rotating workpiece to create a flat face perpendicular to the spindle axis.

Face Milling

A milling operation where the cutting teeth on the face of the cutter generate a flat surface perpendicular to the rotating tool axis.

Peripheral Milling

A milling operation where the peripheral teeth along the outside of the cutter generate a machined surface parallel to the cutter axis.

Climb Milling (Down Milling)

A milling method where the tooth enters the material at maximum chip thickness and leaves at zero thickness; preferred on rigid CNC machines because it reduces chatter and tool deflection.

Conventional Milling (Up Milling)

A milling method where the chip starts thin and increases to maximum thickness, creating upward forces that tend to lift the workpiece.

Kerf

The width of slot or material removed during a cutting process such as sawing, laser cutting, or abrasive waterjet cutting.

Tooth Set

The deliberate outward bend or offset of saw blade teeth that produces a kerf wider than the blade body to prevent binding.

Broaching

A machining process where a tool with successively taller teeth is pushed or pulled through or past stock to cut internal splines, keyways, or profiles in a single pass.

Edge Finder

A setup tool rotated in the mill spindle that contacts the workpiece edge to locate coordinates and set the work origin.

Parallels

Precision-ground steel bars placed beneath a workpiece in a machine vise to elevate it parallel to the vise base.

Rake Angle

The slope of the cutting tool face over which chips flow, controlling chip formation, cutting sharpness, and tool forces.

Lead Angle

The angle between the primary cutting edge of a tool and the direction of feed, controlling engagement and cutting force direction.

Clearance Angle (Relief Angle)

The space between the flank of the tool and the newly cut workpiece surface that prevents rubbing, friction, and premature wear.

Nose Radius

The rounded tip of a single-point cutting tool that controls edge strength, surface roughness, and tool chatter.

Hot Hardness

The capacity of a cutting-tool material to retain hardness and strength at elevated cutting temperatures.

Cemented Carbide

A hard, brittle cutting-tool material capable of maintaining high hot hardness and operating at much higher cutting speeds than high-speed steel.

High-Speed Steel (HSS)

A common cutting tool alloy offering high toughness and moderate hot hardness, suitable for twist drills, taps, and reamers.

Surface Speed ($V$)

The linear velocity at which the workpiece surface or tool periphery passes the cutting edge, expressed in units of $\text{ft/min}$ ($\text{SFM}$).

Spindle Speed ($N$)

The rotational speed of the machine spindle, expressed in revolutions per minute ($\text{RPM}$), approximated by the course shortcut formula $N \approx \frac{4 \times V}{D}$.

Chip Load ($f_z$)

The theoretical thickness of material cut by an individual tooth or flute during each engagement in milling, expressed in $\text{in/tooth}$.

Feed Per Revolution ($f$)

The linear distance that a lathe cutting tool advances along the axis of rotation during one full revolution of the workpiece, expressed in $\text{in/rev}$.

Table Feed ($F$)

The linear travel speed of a milling machine table per minute, calculated using the formula $F = N \times \text{teeth} \times f_z$ and expressed in $\text{in/min}$.

Radial Depth of Cut ($d$)

The thickness of material removed by the cutting tool in one pass, which on an outside turning operation equals half the total change in workpiece diameter.

Spot Drill

A short, rigid drill used to create a shallow conical indentation to establish a precise starting location and keep a twist drill from walking.

Center Drill

A specialized rigid drill designed primarily to create a combination hole and $60^{\circ}$ cone to support work on a lathe center.

Twist Drill

A standardized rotary cutting tool with flutes and two cutting lips that feeds axially to create cylindrical through or blind holes.

Reamer

A multi-flute cutting tool designed to enlarge a pre-drilled hole by a slight amount to achieve precise diameter and superior surface finish.

Boring Bar

A single-point cutting tool used to enlarge, true, and accurately reposition an existing hole on a lathe or mill.

Tap

A multi-fluted threaded cutting tool designed to cut internal screw threads inside a pre-drilled tap hole.

Threading Die

A hardened steel tool with cutting edges shaped to cut external screw threads around the outside diameter of a round bar.

Unified National Fine (UNF)

A standardized thread series with more threads per inch for a given diameter than the coarse (UNC) standard.

Thread Class Symbol B

The letter designation in a thread callout indicating that the thread is internal, whereas the letter A signifies external.

Thread Pitch

The axial distance from one point on a screw thread to the corresponding point on the next thread, calculated as $\text{Pitch} = \frac{1}{\text{TPI}}$.

Grit Number

A sizing rating for abrasive particles where higher numbers designate smaller, finer grains producing smoother finishes.

Surface Grinding

An abrasive machining operation in which a rotating abrasive wheel passes over flat stock, commonly secured by a magnetic chuck.

Centerless Grinding

An external cylindrical grinding process where the workpiece is supported on a work rest blade between a grinding wheel and a regulating wheel without centers or chucks.

Wheel Dressing

The conditioning process of removing dull abrasive grains and loaded metal from a grinding wheel to expose new sharp cutting points.

Wheel Truing

The process of restoring concentricity, roundness, and correct geometric profile to the working face of a grinding wheel.

Honing

An abrasive bore-finishing process that combines internal rotation and axial reciprocation of abrasive stones to produce a crosshatch pattern.

Lapping

A fine finishing operation using loose abrasive particles suspended in a slurry between a lap plate and the workpiece to achieve extreme flatness and finish.

Abrasive Flow Machining (AFM)

A finishing process where a hydraulic ram forces an abrasive-laden polymer medium back and forth through internal passages and complex cavities to deburr and polish them.

Heat-Affected Zone (HAZ)

The region of base metal adjacent to a cut that was not melted or removed, but had its microstructure and mechanical properties altered by high temperatures.

Recast Layer

A thin layer of material on a workpiece surface that was melted during thermal processes like EDM and subsequently resolidified without being flushed away.

Electrical Discharge Machining (EDM)

A nontraditional machining process where controlled high-frequency electrical spark discharges across a dielectric fluid melt and vaporize conductive workpiece material.

Wire EDM

A variation of EDM using a continuously traveling energized thin wire electrode to make precise profile through-cuts in conductive materials.

Sinker EDM (Die-Sinker EDM)

A nontraditional process using a shaped conductive electrode that plunges into a conductive workpiece to spark-erode a corresponding 3D blind cavity.

Electrochemical Machining (ECM)

A non-thermal process where electrical current flows through an electrolyte to dissolve metal from a conductive workpiece (anode) into the tool (cathode) without creating a heat-affected zone.

Chemical Milling

A process of selectively dissolving metal by applying an acid- or alkali-resistant maskant, etching exposed areas, and removing the mask, leaving no thermal HAZ.

Laser Cutting

A thermal separation process where a focused optical beam provides intense localized heat to melt, burn, or vaporize material along a narrow cut.

Ultrasonic Machining (USM)

A mechanical nontraditional process where a vibrating tool drives an abrasive slurry against brittle or hard nonconductive materials (such as glass or ceramics) to micro-chip away material.

Abrasive Waterjet Machining (AWJ)

A cold cutting process that directs a high-pressure stream of water entrained with abrasive garnet particles to erode metal, glass, or stone without generating a heat-affected zone.

Accuracy

The degree of closeness of a measured value to its true or target dimension.

Precision

The degree of repeatability or agreement among multiple repeated measurements of the same feature under unchanged conditions.

Resolution

The smallest incremental division or physical unit change that a measuring device is capable of displaying or distinguishing.

Systematic Error

A reproducible, predictable measurement bias caused by improper calibration, incorrect instrument zeroing, or thermal expansion.

Parallax Error

The apparent displacement or incorrect reading of an analog measurement scale that occurs when viewing the marker or needle from an oblique angle.

Dial Caliper

A versatile shop instrument with sliding jaws capable of measuring outside dimensions, inside dimensions, steps, and depths, typically reading in increments of $0.001\,\text{in}$.

Outside Micrometer

A high-precision handheld measuring tool utilizing a precision screw mechanism, commonly providing fine measurement resolution down to $0.0001\,\text{in}$.

Surface Plate

A flat reference table (often granite) that serves as the baseline datum plane for layout and precision height measurements.

Height Gage

A vertical measuring column that rests on and references a precision surface plate to establish heights or scribe layout lines.

Bore Gage

An internal dimensional measuring instrument with contact points configured to measure inside diameters of holes and cylinders.

Dial Indicator

A displacement-sensing instrument whose internal mechanism converts straight axial movement along a spring-loaded plunger into rotary pointer motion.

Test Indicator

A sensitive inspection device equipped with a pivoting lever tip that measures angular or perpendicular deflection, often used to tram vises or align setups.

Maximum Material Condition (MMC)

The state of a feature where it contains the maximum volume of workpiece material (the maximum allowed shaft diameter or minimum allowed hole diameter).

Least Material Condition (LMC)

The state of a feature where it contains the minimum volume of workpiece material (the minimum allowed shaft diameter or maximum allowed hole diameter).

GO / NO-GO Gage

A fixed-limit attribute gage where the GO member checks the feature at its Maximum Material Condition (MMC) and the NO-GO checks it at Least Material Condition (LMC).

Variables Inspection

A measurement technique that reports a quantified numerical dimension (e.g., using a micrometer or caliper) rather than a binary pass/fail result.

Attribute Inspection

An inspection method that evaluates whether a part meets visual or physical pass/fail criteria (e.g., with fixed-limit gages) without recording specific numerical measurements.

Rule of Ten (Metrology)

A quality rule of thumb dictating that a measuring instrument should have an accuracy/resolution roughly ten times finer than the total tolerance being inspected.

Coordinate Measuring Machine (CMM)

A measurement system that acquires three-dimensional geometric data using tactile touch probes, video optical sensors, or laser scanning probes.

Production Planning

The overarching manufacturing management function that determines resource allocations, operations sequence, labor, scheduling, and budget.

Routing

A manufacturing document that specifies the sequential order of departments, operations, machines, and setups required to produce a component.

Operation Sheet

A detailed technical document providing explicit instructions for performing a single manufacturing step, including required PPE, tooling, fixtures, speeds, feeds, and inspection criteria.

Setup

A specific workholding arrangement that groups together all manufacturing operations that can be performed without unclamping or repositioning the workpiece.