Abstract: A method to confine the
model experiment with the practical measurement has been used to
completely reveal the distributing rule of the dynamic stresses
along the time and height coordinate in the hammer. A new theory
has been put forward, viz, the hammer rod is subjected to both
the tensile and compressive stresses with the same magnitude and
frequency. Two high-peak stress zones have been found in the
hammer rod, namely, the high-peak tensile stress zone and the
high-peak compressive stress zone. The position of the former
zone is agreeable with the statistical law. The formation
mechanism and the affected factors have been analyzed by means
of wave mechanics. Furthermore, the experiments about the effect
of the wave resistance ratio on the load and stress
transmissions have been performed, a new way has been pointed
out from theory and practice for improving the design and use of
the hammer rods and rod component of the forging and stamping
equipment, and for prolonging their service life.
Key words:
Hammer rod Dynamic stress Load
transmitting rule
*
The third of a
series of papers, which is supported by National Science Foundation of
China
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