LAYING OUT AND LAYOUT TOOLS

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Information about LAYING OUT AND LAYOUT TOOLS
Education

Published on July 22, 2009

Author: zaido66

Source: authorstream.com

LAYING OUT AND LAYOUT TOOLS : LAYING OUT AND LAYOUT TOOLS OBJECTIVES : OBJECTIVES FAMILIAR WITH DIFFERENT BASIC LAYOUT TOOLS. IT’S USES AND MAINTENANCE. INTRODUCTION : INTRODUCTION LAYING OUT IS THE PROCESS OF CONSTRUCTING GUIDELINES AND CENTERS BASED ON THE WORKING DRAWINGS PRIOR TO MACHINING. AN ACCURATE,SYSTEMATIC AND FULL SIZE REPRODUCTION OF LINES,CIRCLES,ARC AND OTHER CONSTRUCTIVE DETAILS FROM A DRAWING TO THE MATERIAL TO BE MACHINED OR CUT. LAYOUT TOOLS : LAYOUT TOOLS STEEL RULE-ALTHOUGH CALLED A MEASURING INSTRUMENT,MAY ALSO BE CONSIDERED A LAYOUT TOOLS AS IT IS INDESPENSABLE IN LAYOUT WORK FOR TAKING MEASUREMENTS NOT REQUIRING PRECISION. Slide 5: STEEL RULE HOLDER-FOR HOLDING STEEL RULES IN UPRIGHT POSITION, USED IN TRANSFERRING MEASUREMENTS WITH SURFACE GAGES. Slide 6: SURFACE GAGE-USED IN LAYOUT WORK FOR SCRIBING ON HORIZONTAL OR VERTICAL SURFACES.IT MAY BE ALSO USED FOR LEVELING CASTINGS ON A MACHINE OR FOR INSPECTING WORKS. Slide 7: SURFACE PLATE-A PRECISION TOOL MADE OF CAST IRON OR GRANITE.IT’S TOP SURFACE IS MACHINE AND SCRAPE FLAT.IT IS USED IN LAYOUT AND INSPECTION WORK AS A BASE UPON WHICH TO REST THE WORK AND THE TOOLS. Slide 8: V-BLOCKS-ARE PRECISION TOOLS WITH SURFACE SCRAPED OR GROUND FLAT,SQUARE AND PARALLEL USE TO HOLD CYLINDRICAL WORK PIECE DURING DRILLING OPERATION. Slide 9: SCRIBERS-POINTED TOOLS,MADE OF HARD STEEL USED FOR DRAWING LINES ALONG STRAIGHT EDGES OR AROUND PATTERNS,OR SIMPLY FOR MARKING POINTS. Slide 10: DIVIDER-IS USED LIKE A COMPASS TO LAYOUT CIRCLES,ARC OR DISTANCES,SUCH AS IN SPACING CENTERS OF HOLES TO BE DRILLED AND TO CONSTRUCT OTHER GEOMETICAL FIGURES. Slide 11: HERMAPHRODITE CALIPER-THEY HAVE ONE LEG SIMILAR TO A LEG OF AN OUTSIDE CALIPER,AND THE OTHER OF THAT TO A DIVIDER. Slide 12: TRAMMELS-ARE VERSATILE LAYOUT TOOLS USED IN PLACE OF THE DIVIDER,HERMAPHRODITE CALIPER,OUTSIDE CALIPER,AND INSIDE CALIPER WHEN THE DISTANCES TO BE LAID OUT ARE BEYOND THE CAPACITY OF THESE TOOLS. Slide 13: CENTER PUNCH-IS USED FOR MARKING CENTERS OF A HOLE TO DRILLED.IT’S POINT IS GROUND TO AN ANGLE OF 90 DEGREES. Slide 14: PRICK PUNCH-SIMILAR TO A CENTER PUNCH,BUT IT’S POINT IS MORE POINTED(30-60 DEGREES).IT IS USED FOR MARKING CENTERS OF CIRCLES OR FOR MAKING INDENTATIONS ON A CIRCLES OR ALONG A LAYOUT LINE. Slide 15: COMBINATION SET-CONSIST OF THREE COMBINATIONS MAKING IT A VERSATILE LAYOUT TOOL.THE STEEL RULE, MAY BE USED WITH THE CENTER HEAD,THE SQUARE HEAD,OR THE PROTRACTOR HEAD TO FORM THE FOLLOWING COMBINATION: Slide 16: CENTER SQUARE-USED FOR LOCATING CENTERS OF CYLINDRICAL OR SQUARE WORK PIECES. Slide 17: COMBINATION SQUARE-MAY BE USED AS A TRY SQUARE,AND AS A RULE AND HOLDER WHEN TRANSFERRING HEIGHT MEASUREMENT. Slide 18: BEVEL PROTRACTOR-IS USED FOR LAYING OUT OR FOR CHECKING ANGLES. Slide 19: COMBINATION BEVEL AND MITER SQUARE-IS USED FOR CHECKING,LAYING OUT,AND TRANSFERRING ANGLES. LAYOUT COLORING MATERIALS : LAYOUT COLORING MATERIALS CERTAIN MATERIAL USED TO COLOR THE SURFACES OF METALS TO MAKE THE LAYOUT LINES STAND CLEAR AND SHARP. ORDINARY BLACKBOARD CHALK CAN BE RUBBED OVER THE ROUGH SURFACE OF CAST IRON OR OVER THE ROUGH END OF STEEL FOR DRAWING LINES TO LOCATE CENTER. Slide 21: LAYOUT DYE-IS A COLORED INK -LIKE FLUID THAT CAN BE SPREAD OVER THE METAL WITH A BRUSH. IT DRIES QUICKLY AND LEAVES AN EVEN,BLUE COLORED SURFACE. Slide 22: BLUE VITRIOL-IS MADE BY MIXING 4 TO 5 OUNCES OF COPPER SULFATE IN A QUART OF WATER AND ADDING 4 TO 5 DROPS OF SULFURIC ACID.WHEN THE SOLUTION IS APPLIED TO A METAL SURFACE THE METAL TURNS INTO A COPPER COLOR. GOOD LUCK….

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