JIGS AND FIXTURES FRED H. COLVIN and LUGIAN L. HAAS

A REFERENCE BOOK
SHOWING MANY TYPES OF JIGS AND FIXTURES IN ACTUAL USE, AND SUGGESTIONS FOR VARIOUS CASES
Including Wartime Data Supplement
By FRED H. COLVIN and LUGIAN L. HAAS








McGRAW-HILL BOOK COMPANY, Inc. 1943, str. 372, stan db+ (zakurzona, nieaktualna pieczatka)

ISBN







Contents
Preface to the Fourth Edition
Preface to the First Edition .
CHAPTER I Introduction
Difference between jig and fixture—Jig borers—Principles of jigs arid fixtures—Economic principles—Principles of design—Locating work—Use of V blocks—Efficient clamping—Jig legs, bushings, and latches—General considerations—Prize-winning jig design.
CHAPTER II Designing Jigs and Fixtures
Points to be considered—Standard drawing practice in jig and fixture work—Lines and line work—Standard section lining for different materials—Revolved and other.sections—Dimensioning, dimension lines, and figures—Holes, tolerances, and fits—Finish marks and tapers—Screw threads, bolts, and threaded parts— Thread symbols—Pipe threads—Standardized drawings—Symbols for castings and bar stock.
CHAPTER III Advantages of Tool-design Standards.
Standard parts for jigs-—Standard wrenches, knobs, ball crank, and machine handles—Pilot-wheel spokes and star knobs—Jig-lid stops —Guide pins and bushings—Jig feet—How jigs are standardized in one shop—Locking knuckles and latches—Die sets.
CHAPTER IV Drill-jig Bushings
Tables of standard bushings—Wear bushings, press fit, and renewable. Linear bushings—Bushing specifications—Jig plate thickness—Special bushings—Bushings for two holes—Bracket bushings—-Removable slip bushings—Screen bushings. -
CHAPTER V Types of Drill Jigs and Fixtures.
Rotary fixtures—Tables and latch jigs—Wedge, eccentric, and sliding plate jigs—Double, cross-hole, and large revolving fixtures— Cradle and knee-type rotary fixtures—Puar fixture.
CHAPTER VI
Machine Vises and Vise Jaws
Wedge and V-jaws—Angular and contour jaws—Compensating or equalizing jaws-—Hold-down and special jaws—Holder for castel-lating nuts—Jaws for holding pins—Straddle jaws—Aligning vise jaws—Vise-jaw milling fixtures—Indexing in machine vise— Auxiliary jaws—Time-saving vise for drilling—Simple milling vise.
CHAPTER VII
Details op Fixture Design
Driving and locating plungers—Detents for holding bars—Springs for detent control—Hinge designs for fixture lids—Center-type hinge pin—Bushed hinge pins—Shouldered rivets and screws— Ball equalizer connections—Universal joints—Ball-bearing fixture lids—Stop pins for indexing—Pawls used in indexing—Geneva-type stop motion—Indexing pins and methods—Mistake-proof fixtures —Stud and block fastenings—Profile for setting work—Group bushings—Adjustable screw and slip bushings—Thumbscrews and handles—Laying out a drill jig—Standard T-slots, cutters, and bolts—Standard tongues and splines.
CHAPTER VIII Locating Schemes fob Drill Jigs and Fixtures
V-blocks for centering work—Use in large jigs—Stationary or adjustable stops—Locating and locking work simultaneously— Self-aligning fixtures—Jack screws and jack pins—Springs and locking devices—Self-locking jack—Multiple clamping—Screws used in locking parts together—Clamps for holding tools or work— Lock nuts and expanding collars—Other types of locking devices —Equalizing pressure on several parts.
CHAPTER IX
Clamps and Clamping Methods
Quick-acting clamps—Clamping three pieces with one bolt—Lever clamps and straps—Latches and hook bolts—Eccentric clamps— Side and toe clamps—Nipping blocks—Cam-shaped clamps— Design of cam locks—Spring pins—Jig clamps and lids—Dirt grooves—Drill jig lids—Equalizing clamps—Clamp details— Clamps that save time—Advantages of latch jig—Examples of latch jig—Stock parts of latch jigs—Clamp bushings—Sizes of clamp bushings—Ball nut handles—Drill jig for ball rods.
CHAPTER X Drilling Jigs and Fixtures.
Rigidity—Chip clearance—Bushing dimensions—Coolant space— Angle blocks and wedges—Cross holes in round stock—Two-
position drill fixture—Jig for cotter-pin holes—Self-adjusting jig— Combination clamping—Jig for center drilling—Drilling two parts at once—Drilling and reaming fixtures—Large indexing fixtures— Key-locked jig—Aluminum jig—Guide jig for matching oil holes— Roll-over jig—Right-angle drill jig—Drilling mica—Adaptable drill jig—Parallels for drilling—Cooling drills—Universal jigs— Radical drill fixtures—Unusual boring fixture.
CHAPTER XI
Milling Machine Fixtures
Right way to clamp work—Slot milling fixture—Two-operation fixture—Universal screw-slotting fixture;—Indexing fixture—Substantial dividing head—Turtleback fixture—Automatic indexing fixture—Multiple indexing fixture—Another type of cam lock— Profiling fixture—Semi-automatic plate indexing head—Milling steering knuckles—Fixtures for milling contours—Slide millmg fixtures—Holding two pieces at once—Group milling fixtures— Milling in two planes—Double-head milling—Four-spindle fixture —Splitting bearing blocks—Gang milling—Using straddle mills— Circular milling fixture—Rotary-type fixture—Continuous milling —Radius and form milling—Screw-slotting fixture—Equalizing jaws for rough work—Fixtures for profiling—Milling machine fixtures.
CHAPTER XII
Grinding-machine Fixtures
Fixtures for connecting rods—Fixtures for crankshafts, gears, and valves—Gear-grinding fixtures—Camshaft and cylinder fixtures— Fixtures for propeller hubs.
CHAPTER XIII
Welded, Cast-iron, and Light Metal Fixtures
Cast-iron tools—Welded tools—Welding equipment—Money saved by welded fixtures—Efficient jigs of welded steel—Locating by tongues and screws—Lightweight jigs and fixtures.
CHAPTER XIV Pneumatic Fixtures for Holding Work
Holding weak pieces of work—Other pneumatic milling fixtures—-Positive pneumatic clamping device—Changing hand fixture to use air—Air applied to large fixtures—Air fixture for connecting rods.
CHAPTER XV Fixtures for Inspection Work
Inspecting hole location—Inspecting jig-bushed holes—Inspection fixture for sprockets—One- and two-handed fixtures—Application of gages—A cutter setting gage—Gages used in drilling.
CHAPTER XVI
System in the Toolroom
Records and drawings—Tool-designing department accessories— Tool record and operation sheets—Card files—What do jigs and fixtures cost—Detailed cost sheets.
Index.
Wartime Data Supplement
Assembly-fixtxire construction—Mating or locating jig for bomber wings—Large fixtures used in air-frame work—Jigs and fixtures for the Thunderbolt—Tube-welding fixture—Huge assembly fixtures for bombers—Fixture for adjusting control surfaces.
Index to the Wartime Data Supplement