Multipurpose machining unit

Cutting by use of rotating axially moving tool – Means to drive tool – Universal or flexible drive connection to rotate tool

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Details

74661, 408 48, 408133, B23B 4714

Patent

active

047010827

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to a multipurpose machining unit with pneumatic spindle feed driven by a motor unit directly or by way of a flexible shaft.


STATE OF THE ART

Boring spindle feeds are devices known in the machine, furniture, and wood industries and are utilized for the operations set out below:
Boring spindle feeds are driven by means of the following types of drive units designed for rotation and translation.
The types of drive units (1)-(3) are usable for identical purposes, that is, they can be interchanged. The type of drive unit (4) is employed primarily for large-scale and heavy machining.
The advantages and drawbacks of the various kinds of drive units can be summarized approximately as follows:
Electric motor/pneumatic feed is the most widespread kind of drive mechanism. The structural size of the unit is principally determined by the electric motor; the individual units are relatively heavy. The feeding power is limited by the piston area of the pneumatic cylinder.
The combination of pneumatic motor/pneumatic feed permits compact modesl. Arrangements are also known comprising directly constructed individual release devices. However, the high energy costs for the rotational operation by way of pneumatic rotating-piston engine, for example, have rendered this version increasingly less interesting in view of energy conservation considerations.
The lathe with a flexible shaft and pneumatic feed permits the production of spindles of a compact size. Arrangements are known driving up to eight boring feed spindles by means of a central drive motor. Such a lathe is too expensive for installations of up to three spindles since the expense for the drive mechanism is distributed among too low a number of spindles. Otherwise this configuration is an economical system.


DESCRIPTION OF THE INVENTION

The present invention has the object of providing a possible solution for the construction of machining units of such a type wherein even individual spindles can be operated economically.
The multipurpose machining unit according to this invention is characterized by an interchangeable set of gears, any desired number of gears being provided for simultaneous use.
In this connection, it is possible, for simultaneous use, to arrange for no gear at all, one gear, or several gears, as well as either a connecting coupling for accommodating the flexible shaft, or a motor unit.
It is therefor an object of the invention to provide a new and improved multipurpose machining unit.
It is another object of the invention to provide a multipurpose machining unit with pneumatic spindle feed driven by a motor unit directly or by way of a flexible shaft.
It is another object of the invention to provide a multipurpose machining unit which is economical for installations of less than three spindles.
These and other objects, features, and advantages of the present invention will become more apparent from the following description when taken in connection with the accompanying drawings which show, for the purposes of illustraiton only, one embodiment in accordance with the present invention.
FIG. 1 shows, in a purely schematic view, the individually illustrated groups of a multipurpose machining unit,
FIG. 2 is a lateral view of the machining unit according to FIG. 1, with the drive side being shown in sectional view,
FIG. 3 shows a meridian section through a gear of the gear set,
FIG. 4 shows a frontal view of the gear according to FIG. 3,
FIG. 5 shows a meridian section through a connecting coupling of the arrangement according to FIG. 1,
FIG. 6 shows a frontal view of the coupling of FIG. 5,
FIG. 7 is a meridian section through the drive element according to FIG. 1.


DESCRIPTION OF THE INDIVIDUAL FIGURES

With reference to the drawings wherein like features are represented by like reference numerals,
the multipurpose machining unit, illustrated in FIG. 1 separated into its structural groups, comprises a spindle body 1 on which a brake cylinder 2 is mounted, as well as a gear set 4 with the different gears 5 and 6 show

REFERENCES:
patent: 1858995 (1932-05-01), Klausmeyer
patent: 3213711 (1965-10-01), Kieboom
patent: 3617143 (1971-11-01), McKee
patent: 3709059 (1973-01-01), Elsel
patent: 3724561 (1973-04-01), Merrels
patent: 3894809 (1975-07-01), Hollins
patent: 4105361 (1978-08-01), Petroff
patent: 4315439 (1982-02-01), Grachtrup
patent: 4371297 (1983-02-01), Hirose
Westinghous Engineering, 1959, "A Versatile System of Gears", pp. 108-111.

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