Transcription of THREAD CUTTING & FORMING - Concordia University
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THREAD CUTTING & FORMING - Concordia University
THREAD CUTTING & FORMINGT hreading, THREAD CUTTING and THREAD rolling :MachiningThreads on external Diameters (shafts)Tapping:MachiningThreads on Internal Diameters (holes)Size:Watch to 10 shaftsStraight Threads:Threads on cylindrical surfaces, ex. fastenersConical Threads:Threads on conical surfaces, ex. Pipe jointsMethods: THREAD rolling -small and standard parts, ductile materialsThread CUTTING , THREAD THREAD applications:-fasteningSpecial THREAD applications:-to transmit motion-to transmit power-to measure-to connect pipesStandards: Unified (American)-dim. in inches,pitch in Threads Per Inch (TPI)ISO (Metric)-dim. in mm or inches,pitch in mmTypes:UNC/NC: Coarse THREAD Regular use not subjected to vibration/SeriesUNF/NF: Fine THREAD Automotive and AircraftUNEF/NEF: Extra Fine THREAD Thin structures, High Series, 8UN, 8N: 8 TPI, Dia 1-6 .12 THREAD Series, 12UN, 12N: 12 TPI, Dia . Not widely Series, 16UN, 16N: 16 TPI, Dia . Widely used for fine : For power and motion transmission, Buttress THREAD :Square THREAD :29deg worm THREAD :Pipe threadUnified THREAD :ISOG eometry:Form, Major Dia, Normal Dia, Minor Dia.
THREAD CUTTING & FORMING Threading, Thread Cutting and Thread Rolling: Machining Threads on External Diameters (shafts) ... - Blank material has Narrow tolerances for rolling. Only EXTERNAL THREADS can be ROLLED. USING OF FLAT DIES-The blank is rolled between two dies ... -Only external threads can be rolled-Only soft materials < HRC 37 can be ...
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