DE30822C - Lathe for the production of tapping drills - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 49: Mechanical metalworking.

Patented in the German Empire on June 8, 1884.

The devices shown on the accompanying drawing in FIGS. 1 to 9 on a lathe aim:

1. the transport of the support instead of a lead screw by using a steel belt to effect;

2. A cylindrical and conical back turning using a suitable device of cutting drills in a mechanical way.

The bed found on the lathe bed at the upper and lower part of the steel coils C and F, through which the means of brackets on cd support main carriage fitted steel belt runs.

The movement of the latter is transmitted in the following way by worm shaft G: The worm A engages in the worm wheel B, which BEZW on its one end face with coupling teeth. a gap ring r is provided. This latter has the purpose of which is displaceably mounted in the steel tape roll C knuckle DAF i ¹ P triggering or entraining C effect as soon as the lugs n} n ² of the coupling bolt are retracted by the person sitting on the crankshaft Knaggenscheibe H, that is, from the gaps of the Ring r are brought.

This is done by slightly turning the crank K. If you want to push the entire support backwards, a simple crank is sufficient. rotation in the transport direction, and the steel hinge disc C is taken along by bolts and the lugs of the disc H.

So that no dragging occurs due to the friction of the bolts i ¹ i ² on the gap ring, the retaining pins ν ν ^{1 are} attached to the shaft, which lie against the pin q attached to the bed.

In order to enable the cutting drill to be machined to be processed in a purely mechanical way can be rotated partly cylindrically, in such a way that the transition is effected from conical to cylindrical turning, the following mechanisms are on the support appropriate, which stand in a certain interaction with each other:

The steel holder S is firmly connected to the slide X. The latter is mechanically displaced by a small amount at right angles to the longitudinal axis of the cutting drill, entirely according to the setting of the transport mechanisms.

The latter essentially consist of the following parts:

The slide X is pulled away from the work piece by the two springs / and f ^l , but prevented from doing so by a rail W ' ² which, firmly connected to the slide X , presses against the shoulders of the stepped bolt F ^2. As soon as the latter is turned by means of a crank, another step comes in front of the rail W ² and this makes a small movement which pulls the steel back from the work site. In the opposite case, the steel is guided against the workpiece by rail W ' ² '. If conical turning is to be converted into cylindrical turning at certain points, the following process takes place:

The ruler W ¹ is provided with a conical surface e and in the slide X is

Claims (3)

slidable, but only when its free end hits the release pin ρ. The back thumb U acts on the inclined surface of the ruler, which is given a slow swinging movement by the eccentric E. The swinging motion has the consequence that the ruler W1 and the slide X as well as the steel are displaced, so that a conical turning is achieved. If the conical turning is to stop at a certain point, the Anstofsknaggen ρ must be set accordingly, so that a shift of the ruler is effected and the continued oscillation of the thumb on the slide and steel is not affected. In order to be able to mechanically disengage the steel at its end position after the cut has been made, the prop pin Z1 is attached in the slot groove M of the bed Q. which grips the lug s1 of the thumb step bolt V1 and rotates the latter in such a way that the rail W1 slides off the steps and causes the steel to move backwards. On the other side of the bed, corresponding to the stepped bolt to be moved by hand using the crank L, a second release pin Z2 is attached, which serves to cause the steel to move back when turning in parallel. Patent claim: A lathe for the production of taps, in which: 1. The shifting of the support is mediated by a steel band guided over disks will; 2.. // ¹ is connected to the disengagement of the steel work, the slide rail with X W ² wherein W ² and springs against the lugs M ¹ M ² M ³ of the rotatable stepped bolt F ² applies, and 3. the transition from conical to cylindrical turning (and vice versa) is brought about by the ruler W ¹ provided with an inclined surface, through which the movement of the slide X is below. The action of the pressure thumb U provided with stepped bolts F ¹ and influenced by the eccentric E is regulated. 1 sheet of drawings.