Cutting by use of rotating axially moving tool – Tool-support with means to move tool relative to tool-support – To move radially
Patent
1992-02-13
1993-07-20
Bishop, Steven C.
Cutting by use of rotating axially moving tool
Tool-support with means to move tool relative to tool-support
To move radially
408153, 408173, B23B 5100
Patent
active
052288137
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a tool, in particular a fine-turning boring bar, for use in machine tools, comprising a shank part which can be coupled to a rotating tool spindle, a head part which is connected to the shank part so as to rotate therewith and can be adjusted transversely with respect to the shank part, and a cutting support arranged in the head part.
BACKGROUND OF THE INVENTION
The adjusting mechanism for the fine adjustment of the head part requires relatively much space in tools of this type. Since the structural parts of the adjusting mechanism cannot be randomly reduced in size, the tool diameter has strict requirements. In addition, the precision of the fine feed in conventional adjusting mechanisms often leaves much to be desired.
SUMMARY OF THE INVENTION
The basic purpose of the invention is to provide a tool of the above-mentioned type which, even in the case of a very small tool diameter, has a high precision feed and a sufficient stiffness.
To attain this purpose, the invention suggests that cylindrical fitting pins are formed on the shank part and on the head part of the tool, which fitting pins face one another and have radially extending face grooves at their mutually adjacent ends, that between the mutually adjacent ends of the fitting pins there is arranged a cross-coupling element with mobile coupling claws projecting axially from both sides thereof and extending relatively radially movably into the face grooves of the fitting pins, which face grooves are aligned perpendicularly with respect to one another, that the two fitting pins extend into fitting holes of an eccentric sleeve rotatable relative to the fitting pins, which fitting holes are eccentric to one another, and that the head part and the shank part are connected, with the intermediate clamping of the coupling element and/or the eccentric sleeve, by means of a clamping anchor extending with radial clearance through holes in the shank part and in the cross-coupling element and engaging a thread on the head part and supported against an abutment in the area of the shank part.
The fitting holes, which are eccentric to one another, are advantageously arranged such that the longitudinal axis of the fitting hole receiving the fitting pin of the shank part is aligned with the axis of rotation of the tool and that the longitudinal axis of the fitting hole receiving the fitting pin of the head part is parallel and radially offset with respect to the axis of rotation of the tool.
The cross-coupling element is advantageously constructed as an annular piece with mobile pairs of claws axially projecting to both sides thereof and angularly spaced at 90.degree. with respect to one another. The eccentric movement is, during rotation of the eccentric sleeve, converted into a radial sliding movement between the head part and the shank part by the cross-coupling element. The converting of the movement requires a certain freedom of play in the coupling area and a slight tilting of the cross-coupling element relative to the tool axis. In order to make this possible, the claw flanks of the cross-coupling element are aligned not exactly parallel from their root toward the tip but are inclined at an angle. Also, the axially facing bearing surfaces on the annular piece are not flat but form an obtuse conical surface.
The shank part has, according to a preferred development of the invention, an axial hole stepped toward the side of a pin, in the enlarged part of which stepped hole a head of the clamping anchor is guided. Spring means, advantageously constructed as a set of springs, are arranged between the oppositely lying shoulders of the stepped hole and of the clamping-anchor head. The spring means assure that the eccentric sleeve and the cross-coupling element are clamped, when the clamping anchor is tightened, at a certain force between the head part and the shank part of the tool and are thus adjusted free of play, however, are still rotatable or rather transversely movable relative to these parts. A spacer rin
REFERENCES:
patent: 3613192 (1971-10-01), Tanabe et al.
patent: 4467679 (1984-08-01), Johne et al.
Scheer Gerhard
Schneider Eberhard
Bishop Steven C.
Komet Prazisionswerkzeuge Robert Breuning GmbH
LandOfFree
Tool for use in machine tools does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tool for use in machine tools, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tool for use in machine tools will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1757099