MARKING & MARKING TOOL ( ITI THEORY ) PART 2

SCRIBER :-

  1. IT IS MADE FROM HIGH CARBON STEEL & HARDENED STEEL.
  2. IN LAYOUT WORK, IT IS NECESSARY TO SCRIBE LINES TO INDICATE THE DIMENSION OF THE WORK PIECE TO FILED OR MACHINED.
  3. WHEN MARKING WITH SCRIBER IS INCLINED (75-80) DEGREE TOWARD THE DIRECTION OF MOVEMENT.
  4. IT'S POINT ANGLE IS (12-15) DEGREE.
  5. OFFSET SCRIBER IS USED IN VERNIER HEIGHT GAUGE.

DIVIDER:-

  1. DIVIDER ARE USE FOR SCRIBING CIRCLE, ARC & FOR TRANSFERRING & STEPPING OFF DISTANCE.
  2. DIVIDER ARE AVAILABLE WITH FIRM JOINTS AND SPRING JOINT.
  3. THE MEASUREMENT ARE SET ON THE DIVIDER WITH A STEEL RULE ACCURACY IS 0.5 MM , TRANSFER DIMENSION.
  4. FOR CORRECT LOCATION & SEATING OF DIVIDER LEGS PRICK PUNCH MARK ARE USED.
  5. DIVIDER ARE SPECIFIED BY THE TYPE OF THERE JOINT AND LENGTH.
  6. DIVIDER POINT SHOULD BE FREQUENT SHARPENING WITH OIL STONE IS BETTER THEN SHARPENING BY GRINDING.
  7. IT IS MADE OF HIGH CARBON STEEL OR TOOL STEEL WITH POINT HARDENED & TEMPERED.

TRAMMEL:-

IT IS USED TO DRAW ARC & CIRCLE OF GREATER RADIUS, THAT CAN BE DRAW WITH DIVIDER. 

HERMAPHORDITE CALIPER:-

  1. IT IS ALSO CALLED JENNY CALIPER OR ODD LEG CALIPER.
  2. HERMAPHORDITE CALIPER HAVE ONE LEG WITH AN ADJUSTABLE DIVIDER POINT WHILE OTHER LEG IS BENT.

USES

  1. FOR MAKING LINES PARALLEL TO THE INSIDE & OUTSIDE EDGE.
  2. FOR FINDING THE CENTER OF ROUND BAR.
  3. CALIPER WITH BENT LEG ARE USED FOR DRAWING LINE PARALLEL ALONG ON INSIDE EDGE & ALSO OUTSIDE EDGE.
  4. IT CAN ALSO BE USED FOR SCRIBING LINES ALONG CURVED EDGDE.

PUNCH:-

  1. PUNCH ARE USED IN ORDER TO MAKE CERTAIN DIMENSIONAL FEATURE OF LAYOUT PERMANENT.
  2. PUNCH ARE MADE OF HIGH CARBON STEEL & POINT OF PUNCH ARRE HARDENED & TEMPERED.
  3. HOLD THE PUNCH AT 45 DEGREE ANGLE & PLACE THE POINT ON THE LAYOUT LINE.
  4. HRC OF PUNCH IS (55-59).

THREE TYPES OF PUNCH




  1. DOT PUNCH- THE ANGLE OF POINT IS 60 DEGREE & IT IS USED FOR MAKING WITNESS MARK.
  2. CENTRE PUNCH- THE ANGLE OF POINT IS 90 DEGREE & IT IS USED FOR LOCATING HOLES & WIDE PUNCH MARK GIVES A GOOD SEATING FOR STARTING DRILL.
  3. PRICK PUNCH- THE ANGLE OF POINT IS 30 DEGREE & IT IS USED FOR MAKING LIGHT PUNCH MARKS NEEDED TO POSITIONING THE DIVIDER.



No comments:

Post a Comment

MARKING & MARKING TOOL ( ITI THEORY ) PART 2

SCRIBER :- IT IS MADE FROM HIGH CARBON STEEL & HARDENED STEEL. IN LAYOUT WORK, IT IS NECESSARY TO SCRIBE LINES TO INDICATE THE DIM...