Gear cutting – milling – or planing – Milling – Work support
Patent
1983-11-07
1987-07-07
Bilinsky, Z. R.
Gear cutting, milling, or planing
Milling
Work support
74813R, 408 71, B23Q 302, B23Q 1700
Patent
active
046783814
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to rotary machining turntables and more particularly to portable machining turntables that can be electrically or mechanically rotated to allow single or compound angles to be milled, ground and/or drilled.
BACKGROUND ART
The problems encountered by machinist in setting-up single and particularly compound angles are enhanced by the unavailability of an easy-to-operate and versatile rotary head. The heads presently available are designed to be used either vertically or horizontally. To set-up compound angles with this type of head, the head must be shimmed or blocked to produce the second angle of a compound angle. Additionally, incremental increases or decreases in the angular displacement are difficult since for every change the shim must either be moved or increased/decreased and the angle remeasured. This type of set-up is not cost-effective since it is very time consuming and must be made by an experienced machinist.
A search of the prior art did not disclose any patents that disclosed the versatility and ease of handling provided by the instant invention. However, the following U.S. patents were determined to be related:
______________________________________ U.S. PAT. NO.
INVENTOR ISSUED
______________________________________
4,274,773 Burkhardt 23 June 1981
3,273,879 Floren 20 September 1966
3,197,197 Butin 27 July 1965
______________________________________
The Burkhardt patent discloses a rotary index table comprising a stationery table housing, a table plate for mounting the work piece and a rotation means mounted on the housing.
The Floren patent discloses a compound sine plate or holder which is tiltable to provide a support surface at various angles for working operation.
The Butin patent discloses a device for holding work pieces on a machine-tool table which contains one longitudinal groove aid part for locking a vise base to the machine table.
DISCLOSURE OF INVENTION
The Portable Machining Turntable (PMT) is used combination with a milling, grinding or drilling machine to allow both single and compound angles to be worked. Two embodiments of the PMT are disclosed with the preferred embodiment powered by an electrical motor with a mechanical override and a solely mechanical model. The electrical model is comprised of an integral housing enclosing an electric stepping motor that through two pulleys and a timing belt turns a worm drive assembly incorporating a worm. The worm drives a worm gear that in-turn rotates a rotary head on which the work piece is mounted. The mechanical model excludes the electrical motor and associated components and is mechanically configured to allow the rotary head assembly to be rotated by a socket wrench. The power to the stepping motor is supplied and controlled by a standard numerical control system that is not a part of the invention.
The PMT is operated by mounting it to the machine base by use of standard clamp blocks that are inserted into hold-down slots located on the lower outside walls of the PMT housing. The work piece is then secured to the top of the rotary head by means of the T-channel slot and/or the threaded mounting holes. Once the work piece is secured the rotary head is rotated to the desired working angle. If a compound angle is required the PMT is clamped to a standard machine vise and the PMT is positioned within the vise at any angle between 0 and 90 degrees to provide the first angle. The second angle is then produced by rotating the rotary head in the prescribed manner.
In addition to providing an improved and simplified method for accurately setting-up single and compound angles it is also an objective of the invention to provide an apparatus that: drill,
BRIEF DESCRIPTION OF THE DRAWINGS
The details of the Portable Machining Turntable (PMT) are described in connection with the accompanying drawings in which:
FIG. 1 is an isometric view of the overall electrical PMT attached to a mill bed.
FIG. 2 is an exterior side view of the electrical PMT.
FIG. 3 is a top view s
REFERENCES:
patent: 1396302 (1921-11-01), Wagner
patent: 2480618 (1949-08-01), Tresidder
patent: 2570444 (1951-10-01), Henkel
patent: 2595424 (1952-05-01), Studler
patent: 3496832 (1970-02-01), Celinder et al.
patent: 3685965 (1972-09-01), Bertoglio
Bilinsky Z. R.
DeBoer Ted
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