DE1866147U - DEVICE FOR MECHANICAL MACHINING OF FIXED WORKPIECES WITH ECCENTRICALLY CIRCULATING TOOLS, IN PARTICULAR FOR CUTTING THREADS. - Google Patents

Description

Heinz Brunn - ■ ■ ^{υ lU lü} ' L% d, Q. £

(67) Ludwigphafen
Edenkobener «tr. 11th

Device for the mechanical processing of fixed workpieces with eccentric rotating tool, especially for Cutting threads.

The invention relates to a device for mechanical processing of fixed workpieces with eccentrically rotating] tools, especially for cutting threads,

The previously common devices for cutting threads with Fast rotating tool with slow rotation of the workpiece, referred to in the technical literature as thread whirling, are more diverse Form used in industry. For this purpose, in the majority of cases, an additional device, especially for lathes, is used, or special machines are used.

In practice there are cases where the workpiece, its weight, its shape, its scope or its production process because of, can not be set in rotation or only uneconomically. The cutting of threads in such fixed workpieces Up to now could only be done with taps: or dies or on boring and milling machines with centric rotating Pehneidstahl. These methods are particularly useful for large thread diameters proved to be unfavorable in economic terms. The aforementioned disadvantages are eliminated by the present invention eliminated.

Pies is essentially achieved in that one, from a drive motor d, whirling spindle set in high speed b, eccentrically in a work spindle a, z “B. a machine tool, is rotatably mounted, of which it also has a slowly circling and feed movement due to its eccentric mounting learns the axis distance between the vortex spindle b and drive spindle d preferably by one on the work spindle a mounted eccentric g, which is concentric to the whirl spindle b is running, is kept constant.

In the drawings, the subject matter of the invention is, for example Device for internal machining shown. Show it

Fig. Ί the device in elevation,

Fig. 2 the device in rare plan;

further

Fig. 3 Path curve of the cutting edge during internal machining,

Fig. 4 Path curve of the cutting edge during external machining with External attack,

Fig. 5 Path curve of the cutting edge during external machining with internal attack.

Fig. "6 Internal machining e.g. indentations, grooves, etc.,

Fig. T External machining with external attack, Fig. 8 External machining with internal attack. \

In Figure ί and 2 is mounted eccentrically about the dimension ic oiae whirl spindle b in the work spindle a, the one or more cutting tools c. wearing. The drive of the spindle b takes place, for example, from the drive motor d by a belt drive ©, the drive sHio tor d being linked to the work spindle a via a socket f and an eccentric g.

Claims (3)

RA-77789G-5.1Z62 The mode of operation of the device is as follows: As the work spindle a rotates, the eccentric bearing causes the whirling spindle b to rotate slowly, and the motor d causes it to rotate rapidly. The resulting envelope curve (Fig. 3; 4; 5) together with the feed movement of the work spindle a results in a helical line. The motor performs the same circular movement as this at a distance y from the vortex spindle b, in that it is rotatably mounted eccentrically on the work spindle a and concentrically to the vortex spindle b via the coupling elements f and g. This ensures the constant axis spacing y. The device can be used for cutting internal threads and external threads, the whirling spindle b being inclined about the bolts h to avoid form errors on the thread flanks; In addition, for machining, preferably on round bodies, which can only be rotated uneconomically or not at all. Figs. 6; 7; 8 show processing options for this. For internal machining, the trajectory of the tool cutting edge runs as shown in Fig. 3; for external machining, either according to Fig. 4 or 5. 1. Device for the mechanical processing of stationary workpieces with an eccentrically rotating tool, in particular for cutting threads, characterized in that one of a .Antriebsmotor (d), in high-speed motion offset vortex spindle (b), eccentric in a work spindle (a), e.g. a machine tool, is rotatably mounted, from which it is due to its eccentric mounting In addition, it experiences a slowly circling and feed movement. 2. Device according to claim 1, characterized in that the axial distance between the vortex spindle (b) and the drive motor (d) preferably by an eccentric (g) mounted on the work spindle (a), which is concentric to the whirl spindle (b) is running, is kept constant. 3. Device according to claim 1 and 2, characterized in that the vortex spindle for external machining with internal attack according to Fig.5 is designed as a hollow body. Κί «ϊ? ·> Ίί-ί Dtesa UnteFtage '(Be9eh« ltaBr <iMd protection claim) is the last one submitted; she deviates from "der Worlfcssuii" ..- ■; ίί, -ν ^ ΛΐκΛ submitted documents. The legal meaning of the deviation is not georü:;. The original documents are in the official documents, you can always orrne Naeiiw ..-. ". a legal * inferssses can be viewed free of charge. On request, photocopies or flicker, - negative za delivered to the usual prices. . German Patent Office, Gebreucrismusrerstslte.