Automatic turret lathe
AssigneeUniversal Automatic Corporation
InventorsAdolph V. Klancnik, Kenneth A. Klancnik
Life of this patent
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Abstract
An automatic turret lathe in which sequences are manually programmed for automatic control (both turret and cross slide) as an incident to setting up the machine, requiring neither tape nor card programs but rather the manual effort of the machinist; the lathe also incorporates a unique clutch and bearing support for the rotary turret, and the turret has a positive lock for accurately holding the index position; all essential functions and modes including feed rates and r.p.m. are visually displayed.
Claims9
In an automatic turret lathe in which a turret having different faces each for supporting a tool is supported for rotary indexing movement on a reciprocal slide and in which the slide is supported for approach movement toward a workpiece, held by a reversible rotary spindle, and return movement to home position, the lathe including means to index the turret after the slide is in home position, the slide being reciprocated by a variable speed reversible motor adapted to advance the slide at rapid approach speed until the tool engages the workpiece, whereafter the slide is to be advanced at slow feed speed until the depth of cut is attained, and wherein the motor is reversed by a substantial rise in current:
- an automatic sequencer unit attached to the slide to move axially therewith in both the tool approach and tool return direction, means to index the sequencer unit to different positions corresponding to the turret positions, said sequencer unit having at the different sequencer index positions a track for retaining variantly positionable metallic indicium settable manually therein to control the end of rapid approach and the commencement of slow feed;
- proximity switch oscillator control sensors for sensing said indicium when indexed thereto, respectively to change the speed of said motor from rapid approach to slow feed;
- said sequencer unit at each operable index position thereof including means supporting an extendible and retractable stop movable axially therewith and spaced from a fixed stop opposed thereto by a distance equal to the total distance of tool travel so that when the stops engage at the end of the slow feed travel there will be a consequent rise in motor current to reverse the motor
- and a safety switch between the stops to be actuated by the first-named stop and causing the motor to stop upon concurrent failure to sense positioning of the first-named indicium.
In an automatic turret lathe in which a turret slide is indexable from one position to another and in which the turret slide is normally advanced and retracted rapidly and at feed speeds, relative to a workpiece rotated by a spindle, by a reversible variable speed motor turret indexing means;
- a sequencer which indexes with the turret, said sequencer being equipped with manually settable indicia:
- (a) slow feed of the turret slide after the tool is presented to the workpiece regardless of the kind of tool;
- (b) slow withdrawal of the turret slide when tapping or boring;
- and
- (c) reverse spindle motion after or before completing a tap depending on whether the tap is right hand or left hand;
- proximity switch oscillator control sensors for sensing said indicium when indexed thereto;
- said lathe for each tool position having on the turret slide a manually adjustable stop screw indexible with said turret and opposed to a fixed stop to determine the depth of cut when drilling or boring and a switch between the stops to be actuated by the advancing adjustable screw to stop the motor upon failure of the related proximity switch sensor to sense an indicium corresponding to (a) for the corresponding tool position.
Dependencies are inferred from the claim text.