NON-CIRCULAR BORING ON THE LATHE USING CHAIN DRIVE FOR POWER TRANSMISSION
NON-CIRCULAR BORING ON THE LATHE USING CHAIN DRIVE FOR POWER TRANSMISSION
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Date
1990-12
Authors
GUMA, THOMAS NDYAR
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Abstract
A non-circula r borin g attachmen t ha s been developed .
It consist s of a hydrauli c power system in th e form known a s
TKBIO Copying Unit variou s individua l templates, and a chai n
driv e power transmissio n system. Power is tappe d from th e lath e
spindl e usin g a-frictio n clutc h , t o driv e th e templat e t o
actuat e th e hydrauli c power system and consequentl y th e borin g
tool . The attachmen t ha s been teste d and differen t shape s o f
non-circula r bore s o f uniform cross sectio n have been produced .
Surfac e finis h o f th e produced bores, too l vibration s and
cuttin g force s whil e machinin g wit h th e attachmen t have been
measured , presente d and analysed . The surfac e finis h o f th e
produced bore s compare favourabl y t o th e genera l practica l value s
obtaine d from borin g operations. Tool vibration s whil e
machinin g wit h th e attachmen t ar e generall y highe r a t th e star t o f
non-circula r borin g tha n a t full-shap e profil e rnachining . I n al l
instance s vertica l vibration s o f th e too l increas e wit h increas e
i n spindl e speed o r dept h o f cu t o r feed rate . The cuttin g force s
and th e computed machinin g power ar e generall y simila r t o what is
obtaine d durin g conventiona l cylindrica l borin g o n th e lathe .
The experiments have proved tha t th e attachmen t ca n b e
used t o effectivel y produc e good qualit y non-circula r bore s o n
t h e lath e a t spindl e speed s u p t o 180 rev/min .
Description
A Thesis submitted to the Postgraduate School, Ahmadu
Bell o University , Zaria ,in partial fulfillment of the
requirements for the award of the degree of Master of Science
(M.Sc.) in Production Engineering .
NOVEMBER, 1990
Keywords
NON-CIRCULAR,, BORING,, CHAIN,, POWER TRANSMISSION