Milling machine processing spiral groove

In the universal lift milling machine, with the universal dividing head milling spiral groove, the following adjustment should be carried out.

(1) The workpiece is held on the top of the dividing head spindle and is supported by the top of the tailstock, and the table is deflected about the vertical axis so that the milling machine is in the same direction as the spiral groove of the workpiece. The direction of deflection of the milling machine table is determined by the helical direction of the helical groove.

(2) Between the table vertical feed screw and the dividing head spindle, with the exchange of hanging wheel Z1, Z2, Z3 and Z4 link, when the table and the workpiece along the workpiece axis direction, will pass through the wire Bar, with gear and sub-head drive, driving the workpiece for the corresponding rotary motion.

The guide of the helical groove of the workpiece is T. Milling machine longitudinal feed screw lead for the Ts table and the workpiece to move a lead T distance, that is, when the vertical screw to T / Ts, the workpiece should be a turn. At this time the workpiece can be cut by the cutter cutter lead for the spiral groove T.

According to the drive system diagram, motion balance can be listed:

Simplify and replace the formula:

Formula Ts for the milling machine table vertical feed screw lead; T for the workpiece spiral groove lead.

For sub-tooth parts (such as helical gears, helical cutter, twist drill, etc.), after each processing a tooth groove, the workpiece should be removed from the processing position, pull out the pin J so that the dividing head spindle and longitudinal feed screw broken movement contact, and then use the simple dividing method to divide the workpiece.