Turning – Lathe – With work feeder or remover
Patent
1990-03-22
1994-04-19
Bilinsky, Z. R.
Turning
Lathe
With work feeder or remover
82126, B23B 1310, B23B 1500
Patent
active
053036220
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a device for preventing the deflection of elongated workpieces rotating about their longitudinal axis.
BACKGROUND ART
Elongated workpieces are machined by apparatus such as lathes, while being rotated about their longitudinal axis. If the workpiece deflectively revolves in this case, problems such as reduced machining accuracy and a break in the cutting tool will arise.
FIG. 11 shows a device for preventing the deflection of an elongated workpiece rotating about its longitudinal axis. This device comprises a plurality of bolts 31 screwed through a frame 30 around the elongated workpiece M, and a contact member 32 attached to the forward end of each bolt 31. The bolts are moved inwardly or outwardly of the frame 30 in accordance with the outside diameter of the workpiece M to cause the contact members 32 to support the outer periphery of the workpiece M against deflection.
With the deflection preventing device shown in FIG. 11, however, the elongated workpiece M is supported at only one point along its length, therefore greatly deflectively revolves in front and rear of the supported position as seen in FIG. 10 and can not be prevented from deflection fully effectively. When some kinds of elongated workpieces M which are different in outside diameter are to be supported by the device, the plurality of bolts 31 must be rotated individually to adjust the amount of projection of each bolt into the frame 30, hence a very cumbersome adjusting procedure.
An object of the present invention is to overcome the foregoing drawbacks of the prior art.
DISCLOSURE OF THE INVENTION
The present invention provides a device for preventing deflection of an elongated workpiece M rotating about its longitudinal axis, the device being characterized in that it comprises a housing 6, and a contact ring 9 rotatably mounted on the housing 6 for inserting the elongated workpiece M therethrough, the housing 6 being rotatable about a support shaft 12, the support shaft 12 being perpendicular to the axis of rotation of the contact ring 9, the angle of inclination of the rotational axis of the elongated workpiece M relative to the axis of rotation of the contact ring 9 being variable by the rotation of the housing 6 about the support shaft 12, the outer periphery of the elongated workpiece M being supportable by the inner periphery of the contact ring 9 at its axial one end and at the other end thereof.
Thus, the elongated workpiece M is supported by two points, i.e., one end and the other end of the inner periphery of the contact ring 9, with the result that the deflective revolution of the workpiece M is smaller as seen in FIG. 9 than is the case with FIG. 10. Further when a plurality of kinds of elongated workpieces M different in outside diameter are to be supported, the angle of inclination of the rotational axis of the contact ring 9 is variable relative to the rotational axis of the workpiece M by rotating the housing 6 about the support shaft 12, whereby the contact ring 9 is adapted to support each of the workpieces M of different outside diameters with one end and the other end of its inner periphery.
Preferably, the housing 6 is in the form of a hollow cylinder, and the contact ring 9 is fitted in the cylindrical housing 6, whereby the contact ring 9 can be held in place with good stability.
Preferably, a bearing 7 is interposed between the housing 6 and the contact ring 9. This renders the contact ring 9 smoothly rotatable.
The elongated workpiece M can be prevented from defacement by preparing the contact ring 9 from a material other than the metal.
The contact ring 9 may be in the form of an integral piece or may comprise two divided segments as arranged side by side axially of the ring.
The angle of rotation of the housing 6 about the support shaft 12 can be adjusted promptly by adjusting means 17 therefor for elongated workpieces M of different outside diameters.
When equipped with drive means 16 for rotating the housing about the support shaft 12, the device is usabl
REFERENCES:
patent: 851547 (1907-04-01), Muncaster
patent: 3874520 (1975-04-01), Scheler
patent: 4200013 (1980-04-01), Momoi et al.
patent: 4324162 (1982-04-01), Uehara
patent: 4700593 (1987-10-01), Cucchi
patent: 4961358 (1990-10-01), Goda
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