Hydraulic circuit for Milling machine by Er. Abhisek Bhattacharjee

In figure below hydraulic circuit for Milling Machine is shown. In Milling Machine cutter is situated at a fixed position and rotates with high speed. And the workpiece is clamped on table, which move linearly in to & fro motion. Table movement in milling machine is comparatively slower.
It has a main pump which is a low pressure and high discharge pump and one booster pump ,which boost the hydraulic pressure to higher level. By using a booster pump expensive high flow and high discharge pump is avoided. There are two set of flow control valve and check valves, fitted in both supply and return line of the
cylinder to achieve speed control in both direction. A manually operated spool valve decides the direction of flow to the cylinder. The stroke length of the cylinder is adjustable through limit switches. The limit switch disconnect supply of oil to cylinder when table reaches the set position.

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Hydraulic Circuit

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