Electric lathe

Details Electric lathe Electric lathe

1985-11-21

1987-06-02

Rosenbaum, Mark

Metal working

Method of mechanical manufacture

Converting

29434, 29557, 2411012, 51246, B21K 2116, B23P 2300, B24B 1900

Patent

active

046691669

ABSTRACT:
A novel retrofit process for converting the hydraulic lathe of an existing pulp-grinding machine into the new electric one is described. This process includes utilization of the pre-existing hydraulic cylinder as a supporting housing and shield for a major portion of the drive assembly for the electric lathe. In the preferred "retrofit" embodiment, the drive for the lathe comprises a ball-screw assembly housed inside the cylinder, after the cylinder has first been evacuated. This drive assembly includes a longitudinally fixed, but rotatable "power screw" that is supported by opposite ends of the cylinder. A variable speed, reversible motor is located outside one of the cylinder ends and is coupled to the screw to selectively rotate it. A threaded collar is located inside the cylinder and straddles the screw. It carries a pair of parallel, spaced rods that extend through the end of the cylinder that is opposite the cylinder's "motor end". These rods are connected to a yoke which, in turn, is connected to the standard carriage-carrying burr mandrel or "dressing wheel" used in the prior hydraulic lathe.

REFERENCES:
patent: 1642053 (1927-09-01), Warren
patent: 2970779 (1961-02-01), Duty
Pulp and Paper Science and Technology, vol. 1, Chapter 8, McGraw Hill Book Company, New York, 1962.

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