Interesting application story from TRD Manufacturing, a Bimba company: A machine integrator had to design an automatic forge loader that could detect the orientation of the first operation head offset on a ¾-in. square steel fastener, rotate the part accordingly, and place it in the forge die for the second operation. The part placement required a minimum force of 1100 lb to properly “nest” into the forge die. The “placement” actuator required 8 in. of stroke; space was very limited. Due to the force requirements and space limitations, a double acting 750 psi hydraulic actuator would be required. The overall cylinder retracted length could not exceed 9 in.
A typical double acting cylinder would require a base length of 4.875 in. plus the stroke length of 8 in. (12.75 in. total), which exceeds the 9 in. available space. A hydraulic double acting telescoping cylinder was developed to solve the overall space limitations. The telescoping cylinder has a base length of 4.75 in. plus HALF of the total stroke (4 in.), for a total overall length of 8.75 in.
After forging, the parts would be immediately quenched in water as part of a heat treat process. Since the immediate environment would have extremely high humidity, the designers choose a corrosion resistant grade of stainless steel as the cylinder base construction material.
TRD model: TC – MS4 – 1.5 X 8 X 2S – KK3 – TH - SS
The 1.5-in. effective bore size telescoping cylinder with 8-in. stroke was able to assist in achieving the expected 3 second total cycle rate.
See the video of the loader in action, and photos below that: