In the process of repairing 400kg air hammer in our factory, the processing of the keyway in the hammer lead (Fig. 1) encountered difficulties due to the limitation of the B5032 type of inserting machine. To this end, we have made a kind of arbor, using the maximum cutting length of 650mm of the B665 type head planer, to solve the problem of the keyway processing by planing and inserting. The newly designed shank is an L-shaped extended planer bar (Fig. 2). The shank body is welded. In order to increase the strength and rigidity of the shank, the welding position should avoid the weak link of the stress concentration aa. In addition, welding reinforcement plates can also be used without affecting the processing conditions.
Ningbo Kyson Cool Electronic Technology Co., Ltd. , https://www.kysonrefrigeration.com