| 摘要 |
<p>PURPOSE: A hydraulic feeding speed control device is provided to maintain optimal feeding speed while drilling workpieces by preventing defects like burrs and the displacement of a drill hole. CONSTITUTION: A hydraulic feeding speed control device(B) comprises a body(1), a cylinder(2), a main piston(4), a main piston rod(5), a fluid pressure chamber(12), a reservoir chamber(14), flow paths(13), feeding speed controlling mechanisms(C), and a differential piston(17). The cylinder is arranged in the body. The main piston is arranged to reciprocate in the cylinder. The main piston rod is coupled to the main piston and is arranged to move forward and backward. The fluid pressure chamber is arranged in front of the main piston to reserve fluid. The reservoir chamber is arranged in back of the main piston to reserve the fluid. The flow paths are connected to the reservoir chamber and are arranged between the body and the cylinder. [Reference numerals] (AA) Front; (BB) Rear</p> |
