important for engineering students

2. A SHAPER MACHINE
• Shaper is Machine tool which produces flat surfaces in horizontal,
vertical or inclined planes depending upon the orientation of the
cutting tool.

3.  In shaping machine the ram moves the cutting
tool is backward and forward direction in a
straight line.
Forward motion is called cutting stroke and backward
motion is called is called return stroke.
 no cutting during return stroke.
 it can also produce concave and convex surface.

4.  Base
 Column
 Table
 Cross Rail
 Ram
 Tool head

6. Basic operation on shaping machine can be classified as-
 Horizontal cutting
 vertical cutting
 Inclined cutting
 Grooved
 Slotted
 Stepped

7. 1.The Acc. to the ram driving
mechanism
 Crank shaper
 Geared shaper
 Hydraulic shaper
2. Acc to the position & travel of ram
 Horizontal shaper
 Vertical shaper
3. Acc to the direction of cutting stroke
 Push Type shaper
 Draw type shaper
4.Acc to the design of the table
 Standard shaper
 Universal shaper

8.  Maximum ram stroke= 700mm
 Maximum tool overhang =840mm
 Max. distance b/w table surface and ram = 400mm
 Min. distance b/w table surface and ram = 80mm
 Dimension of table working surface = 700×450mm
 Max. horizontal travel of table=700mm
 Max. vertical travel of table= 320mm
 Motor power = 7kw
 horizontal feed = 0.25-5mm
 Overall dimension= 2780 ×1750×1780mm

9. L: length of stroke in meters
N: number of stroke per minutes
Distance moved by the shaper
tool per mnt. =LN
Cutting stroke/return
stroke=3/2
Cutting time/total
time=3/5

10.  Cutting speed=(5/3)LN
 total no. of stroke required to complete a job(St)=W/F
(where W=width of the workpiece)
L=length of stroke
Vo=cutting speed in m/min
Vr=return speed in m/min
f =feed per cycle in m.
 cutting stroke(to)=L/Vo
 return stroke(tr) =L/Vr
 number of cycles = W/f
 total time for one cycle(T)=to+tr
MACHINING TIME(Tm)=NO.OF CYCLE×TIME PER CYCLE
Tm=(W/f).T