DE18687C - Double-acting turret button lathe - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

• CLASS 39: Horn, ivory and plastic bodies.

Patented in the German Empire on July 12, 1881.

The machine is used to manufacture buttons from Steinnufs, horn, bone and mother-of-pearl Wood etc. and creates the buttons by shifting the two bearing sticks which the rotating tool spindles.

On a cheek piece α ^{with a dovetail guide, Fig. 1} to 3, the two headstocks l · 1 P move in this guide, while in a second dovetail guide attached at right angles to the former in the center of the cheek, the carrier of the turret disk c is held in such a way that that it can be easily removed with a single movement.

In the cheek α the control shaft further is still d, which in turn e and the wheels Z ^"1 / receives through the disengageable stage disk ^2, a slow rotation.

On the same sit the cam disks ^ · ¹ ^ - ² , which mediate the alternative movement of the headstocks by means of adjustable roller journals k ^l h ² , which in turn can be adjusted against the headstock by the screws y in the headstock, while an eccentric disk / ^N with attached roller pin z: the reversal of the turret disk c concerned, which serves to accommodate the material cut into correspondingly thin and parallel lined plates on two sides.

The turret disk c, Fig. 4 to 6, is provided with eight openings and has fixed jaws i on the side directed towards the center, but on the opposite side, i.e. the peripheral side, but radially movable in guides, held by spiral springs towards the center i, Fig 4, between which the workpiece is clamped.

A clamping roller k held down by a strong spring k ¹ presses on the movable jaw i while the tool of one headstock b ¹ mills the material and holds it accordingly. When the two headstocks fall, the eccentric disk / the latch lever m, which is held by the spiral spring in the corresponding incisions in the turret disk, and almost simultaneously the pinch roller k are lifted out and then moved by the roller pin ζ on the eccentric / the ratchet lever η , the latter through pawl 0 and the ratchet wheel / the eighth turn of the turret disk causes, whereupon latch lever m holds the turret disk in place, and then the pinch roller k falls down. The work piece milled by the first headstock on the front side is now machined after the turret disc continues to steer by an eighth of a turn by the second headstock P , which is set exactly one eighth of a turn of the turret disc, on the other side and, since both headstocks are working simultaneously. and work, held by a pair of pliers r, Fig. 3, going forward with the first headstock, and when the pliers fall, the now finished button is held by a tongue s ¹ guided between its legs and by means of a resilient blade s attached to the frame, which points to the Tongue presses, expelled.

These pliers r still hold the button after it has already been milled out of the material, and the cutter of the headstock P

takes away the edge left by the material by advancing to its outermost position. When the turret disk is reversed, the remainder of the material still located between the jaws is carried by a track attached to the turret housing. t, Fig. 4, on which the elongated spring pin of the movable jaw runs and thus lifts the jaw, removed by falling out.

The pliers r can be displaced in two fork bearings u ¹ and ² , FIGS. 2 and 3, attached to the first headstock P , by means of precisely adjustable guide jaws and is moved by the correspondingly shaped second curve of the cam disk g ^x by means of the double-armed lever ν . A spring ν ¹ at the end of the pliers causes the latter to be clamped, while wedge-shaped approaches on the pliers legs at the end of the forward movement of the headstock cause the pliers to be compressed by the fork bearing u ² and open when they return.

First the tongs is r until shortly before the work piece and, while the same after and reached after their extremity of position, the headstock follows b ^l, and attached to this fork bearing ^u% asleep by about the located on the two pliers limbs wedge-shaped projections pushes the jaw of the pliers, which thereby holds the work piece in place. When the headstocks go down, the pliers with the headstock b ^{1 go back} a distance, then stop and, while the headstock moves back into its outermost position, the wedge-shaped attachments of the pliers legs are released from the fork bearing u ² , the pliers open and the workpiece is pushed out by the previously pushed back tongue s ¹ by virtue of the resilient blade ί tensioned by the fall.

The work of the machine is now as follows:
The work piece used is brought into the work area of the first headstock b ¹ by reversing the turret disk, both headstocks first advance faster until in front of the work piece, and then more slowly during the machining of the latter, and then both quickly backwards at the same time.

During the decline, the turret disk is reversed; the game then repeats itself, and the work piece, which has been moved forward by an eighth of a turn, is held by the pliers r and immediately afterwards milled out by the tool of the second headstock P , while the first headstock b ^{1 processes} the newly inserted material. When the headstocks and the pliers decrease, the milled button is ejected.

In order to enable re-sharpening of the tools in the headstocks, the machine is so constructed that the revolver disk with its underframe, like such in its entirety is shown in Fig. 4 to 6, pull yourself slightly out of the cheek and readjust in their specific place with a simple movement in their correct position hold on. For this purpose the guide bar is screwed to the bed, however, in such a way that it allows a length shift and thereby worked with several in a wedge-like manner Surfaces against adjusting screws; this way the guide bar that is connected to a small double-armed lever, loosened by tightening the lever and through. Pressing it down tightly, so that the revolver frame in one case loosely, becomes stuck in the other. A precision pin holds the revolver frame in its exact position.

Another device of the machine is a safety device to protect the tools and the workpieces from possible destruction in the event of a wrong setting of the turret disk, which is achieved by extending the locking lever m a light one-armed lever x ¹ at a short distance from it Pivot point supported.

If the locking lever m does not fall into the incision of the turret disk, then this small lever x ^{1 is} not lifted up, and a thumb connected to the roller pin h ^{x of} the headstock hits this lever while walking forward and moves it for as long as to the connected to this latter pull rod of the switching device χ the crown of the small wheel f ¹ from the recesses of the stepped disk E has pressed out and interrupts any further movement of the control shaft d, during the other hand, the milling spindles and the stepped disc, the direct its motion from the transmission received, maintaining their rotation.

Claims (1)

Patent claim: The double-acting turret-knob lathe shown in the drawing with the laterally extendable turret disc c, Fig. 4 to 6, and the two milling cutters acting simultaneously on different workpieces in the spindle sticks b ¹ and b ² , Fig. 1 to 31, as well as the automatic pliers r as a holding device for the work piece milled by the first milling cutter in b ^l for its completion by the second milling cutter in P. For this purpose I sheet drawings.