June 14, R. E. DIL-:NER 2,, TURRET INDEXING MECHANISM Fild April 5 Sheets-Sheet 1 F/GJ f Arrow/Ys June 14, R. E. y A. E. DRISSNER ETAL 2,, TOOL TURRET INDEXING MECHANISM Filed Jan. 21, 5 Sheets-Sheet 1 F lG.l. INVENTORS; ALFRED E. Jan. 27, A. BECHLER 2,, TURRET INDEXING MECHANISM FOR AUTOMATIC LATHE Filed Dec. 21, 2 Sheets-Sheet 1 ‘III/Il’IIIIII/IIIIIII 2 Jan.
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Other objects of the invention will appear in the description of an embodiment of the inven- I tion illustrated in the drawings. Y VA invexing VmemberQS, having an axially extending portion 29 is mounted within a cntral’stepped recess 30 in turret member The drive from motor to and including the coupling member is carried on bed 50, while the coupling idexing and the remainder of the train is carried on the turret carriage.
Also the lock-bolt disc 01, as well as the Worms 3 and 12 and their worm wheels 32 and 13, respectively, may be replaced from stock without requirement of any re-machining of the turret bore or turret faces as is now the case, particularly with Geneva type indexing mechanisms.
Frequently it is desired to provide machine tools with ind -xible turrets of large proportions to carry hcav tools hich extend far out from the turret, sometimes as much as three feet, and large turrets and the weights and leverage effect of heavy tools thereon which extend far out therefrom present obstacles to smooth.
It will be understood that a cycle of machine operation includes the step-by-step indexing of the turret 55 through one indexiny, whereby the dog drums and are each also indexed through one revolution, but if the nature of the work piece gurret not require as many turret tool sets as there are indesing faces provided on the turret some of the index movements of the turret and dog drums may cause these parts to pass over some of the index positions.
V Thus, Y ‘7.
A turret 26 is journalled in the machine and carries a plurality of tool slides Mechanisk locking-bolt-cam 5 need not hold the locking turrrt retracted until the next notch in the turret locking disc arrives opposite the bolt because, after the cam has retracted the locking’ bolt and the turret has started indexing rotation, the end of the locking bolt may be allowed to ride on the circular periphery 15 of the locking disc 01 and be held in retracted adjustment thereby until the next notch arrives opposite the end of the locking bolt.
Figure 5 is an enlargement of a portion of Fig. A radial drop in the cam 68 near the opposite side of member 59 provides for insertion of the locking pin 66 in the next recess 61 under the biasing influence of spring H and spring 16 as soon as member 59 has turned the turret to the next indexing position.
The turret locking disc 01 has formed on its mcehanism a number of notches corresponding to the number of index positions or faces of the turret 04 and, when the turret is in any one of its index positions, a locking bolt 46 is adapted to enter and fit snugly in the corresponding notch of the locking disc to hold the turret securely and firmly in its precision indexed position. In the rest position shown in Fig. However, after momentarily opening VswitchA, the switch Aris automatically Yclosed again so that the circuit is’ complete Vf orthe next indexing operation.
US2870656A – Turret indexing mechanism for automatic lathe – Google Patents
Reversible motor 50 drives rotatable control cam 51 by means mechanlsm a reduction gear mechanism 52 whichhas been described in detailhereinabove.
Nut i4 becomes tightened on the stud 08 as the rise of cam part 36 cams lever 39 in one direction and nutv 4 in loosened on stud 08 as the nechanism of the other cam part 35 cams lever 39 in the opposite direction see Fig. Also longitudinally slidably guided on bed 50 there is a turret carriage 54 which supports a tool turret 55 for bodily movement with the carriage and index movement about a vertical axis. The tapered flange5 I and fig’are securedtogether’by a clan’ ping ring 53′ having a tapered inner recess or groove ferreceiving the flanges.
Another object of the invention is’to provide a turret on a’machine tool which is clamped at both ends. Consequently, from the above description it is apparent that two cam followers will at all times be within the indexing groove l and that, as the turret is indexed from one position to the next, an additional cam follower will be brought into-contactwith cam 51 and 6 one off the cam followers 70 will be driven.
Another object of the inventionis to provide an independent motor for turret indexing. Further, the shifting fork 80 releases the brake 0n theworm 71 and connects the clutch April 21, Filed July 2.
USA – Indexing mechanism for turret lathes – Google Patents
For this purpose a rotary stop rod TI is rotatably mounted within bed I parallel to the wayslfl. Upon rotating cam 51 so that a cam follower 71 will drive the turret in a clockwise direction as viewed in Fig. A pneumatic cylinder controls a high speed clutchand the gurret is controlled by valves and Previously, the spindle speed and cam drum mechanixm could be increased during the indexing operations in order to save time; this, however, still did not save much total time for indexing. The switch remains open until operated by the next dog 15H0 at the completion of the turret index, which has just now begun.
Other objects and a fuller understanding of this inverr tion may be had by referring to the following description and claims, taken in conjunction with theaccompanying drawings, in which: Thus, the run-out portion Ir ofcanv can serve as arun-in portion and, accordingly, the run-in portion I, can serve as a run-out portion.
A turret II is mounted on carriage 3 and is adapted to be rotated on a vertical axis to different indexed positions presenting successive faces toward the spindle. Sleeve 36 at the lower end thereof has a gear section 38 for a purpose to be hereinafter described.
Figure 9 is a sectional view of a detail showing the locking bar operating cam and fragments of turert parts. The invention further resides in certain novel features of construction, and combinations and arrangements of parts, and further objects and advantages thereof will be apparent to those skilled in the art to which it pertains from the following description of the present preferred embodiment thereof described with reference to the accompanying drawings in which similar reference rcharacters represent corresponding lparts throughout the several views, and in which: The power for indexing the turret may be, tureet shown, a separate electric motor supported in any suitable manner on the machine base and drives, as through belt or chain mechanusm, a shaft 22 rotatably mounted within the machine base longitudinally of the movement of the turretslide 02 and carrying a long pinion 23 keyed thereon.
As is customary with most turret lathes, the turret-slide is reciprocated with feed motion a slow motion during cutting operation and with a rapid traverse motion a fast or quicker motion when the turret mechaism is not in jechanism motionthis rapid traverse motion being obtainable in various ways from a power source or by a separate motor.
Moreover, when switch is closing contacts 28 andas tkrret mentioned and jechanism shown, current passes from conductors 25 andnormally closed interlock switch 2ii6, conductor i’, normally closed indexing-stop-switchconductorrelay. A stud 33 on each slide 27 is engageable with mecnanism draw sleeve 31 so that the particular slide in operation reciprocates with the draw rod The invention provides a power indexing mechanism that relieves the carriage drive of load during indexing and efficiently and accurately effects mehanism of the movements required in a short time cycle and a predetermined sequence and correlation.
Figure l is a front view of a indexig automatic machine tool embodying the turret indexing mechanism of the invention; Figure 2 is a sectional view of the turret mechanism; Figure 3 is a perspective view of the turret’clamp mechanism; Figure 4 is an end view, partially cut away, of the machine tool; Figure 5 is an end view similar to Figure 3 and principally showing the electrical switches; turfet Figure 6 is a schematic diagram showing the electrical and pneumatic controls and gear trains.
As above stated and with the control in this position as shown in Fig. This hub presents a double cam having cam parts 35 and 38 which engage, respectively, two fingers 31 and 38 of a lever 39 which has a hub 40 attached, as by pin 4 and key 42, to the binder nut 4 on the turret stud Thus, the feed solenoid will be energized to re-engage the feed clutch The number of notches 63 is equal to that of the tool, holders and of the pins It will be noted that the final seating Of the Sprimary turret locating plungerFigs.
USA – Turret indexing mechanism for automatic lathe – Google Patents
The invention is shown as being applied to a singlespindle automatic bar machine tool having a turret. A control plunger -Figs. Thus, the arm 49 of the locking lever formed by the lever member 45 remains in its lower position and prevents lever 51, 52 from rocking in the clockwise direction Fig. V 3, is coaxially disposed upon the motor shaft of motor 0. The cam track 61 is formed by a plurality of I cam plates A cam 81 having a single’V high point or lobe 82 thereon is rigidly secured to an intermediate portion of shaft 61 adjacent the switch A.
The piston 18 would be returned to its right-side starting position well before it had completed its stroke and the indexing of the turret 11 would consequently not be completed. Another object of the invention is to providea mechanism to index the turret, without rotation of the main cam drum of the machine tool. Various embodiments of the invention may be employed within the scope of the claims. With the relays and switchesin the condition just stated.