This document discusses the design and material features of machine tool beds. It notes that machine tool beds, bases, columns and frames are generally made of cast iron due to its high compressive strength, ability to absorb vibrations, machinability, and low cost. The document describes the basic features of lathe beds, including two common designs - one with two girders connected by cross beams to support the saddle and tailstock, and another American type with separate inner and outer slide ways to prevent wear and ensure coaxial alignment of the centers.

1. MACHINE TOOL TECHNOLOGY
MANISH KUMAR VERMA
ASSISTANT PROFESSOR
DR. C V RAMAN UNIVERSITY , KARGI ROAD KOTA ,BILASPUR
(C.G)

2. Design of lathe bed

3. Basic features of machine tools
 Bed, structure of frame
 Slides and slide ways
 Spindle and spindle bearing
 Power units
 Transmission linkage
 Work holding and tool holding elements

5. Material and construction features
 Beds bases column and frames of machine tools are generally
made from Cast Iron because of following advantages possessed
by Cast Iron:
 High compressive strength .
 Easily cast into intricate shape.
 Better capacity to absorb vibrations
 Possess good lubricating properties due to the presence of free
graphite in it.
 Can be machined to fairly high degree of accuracy and
provide a fine surface finish.
 Can be easily allowed with elements like Nickel, Chromium,
molybdenum etc. to increase its hardness.
 Cost is fairly low.

6. Various Bed sections
 Lathe beds of ordinary design consisting
of two girders laid, side by side connected
at intervals by cross beam as shown in
figure
 Saddle rest on outer part of the flat slide
ways.
 Tailstock rest on inner side of slide ways.

7. Various Bed sections
 Figure shows lathe bed cross
section of American type
 Saddle rest on 1-1
 Tailstock rest on 2-2
 Such provision of two separate
slide ways would prevent wear of
tailstock slides and also helps to
prevent coaxially of center.

8. Design of lathe beds