Design guidelines for C Clamp
a) Reduce the number and types of parts used in product manufacturing, so that fewer steps and fixtures are required. This approach reduces assembly cost. This approach is referred to as value engineering.
b) Parts to be assembled should have high degree of symmetry or a high degree of asymmetry. They should be designed such that they would not be installed incorrectly. Or such that they do not require locating, aligning, or adjusting.
c) Designs should allow parts to be assembled without obstruction or the lack of a direct line of sight
Due to bolt tightening (for stem and cap screw).
Experiments have shown that there exists an initial tension in the stem bolt during tightening and
experientially, could be found by the relation
Pi = 1420 d N
where: Pi = initial tension in a bolt
d =nominal diameter of the bolt
STRESS AREA Area of stem bolt under load engagement situation ;
Stress Area = π/4 (dp+dc) 2 2 Where:
dp= pitch diameter
dc = Core or minor diameter
Compressing Or Crushing Stress On The Threads
This effective stress, has to do with the value of the stress between the threads which combine to transfer the needed force to the work piece under the stem. This stress is obtained by the relation;
fc = P π(d2 - dc 2 )n
where : d = major diameter
dc = minor diameter
n = number of threads in engagement
P = maximum safe axial load