Cutting by use of rotating axially moving tool – Tool-support with means to move tool relative to tool-support – To move radially
Patent
1987-04-28
1988-11-22
Weidenfeld, Gil
Cutting by use of rotating axially moving tool
Tool-support with means to move tool relative to tool-support
To move radially
408161, 408179, 407 9, 407 45, B23B 29034
Patent
active
047862173
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION(S)
This U.S. application stems from PCT International Application No. PCT/DE86/00339 fled Aug. 23, 1986
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a tool.
2. Description of the Prior Art
A tool of this type is known from FIG. 1 of U.S. Pat. No. 3,236,125. In this patent the holder is secured directly by means of the securing screw in a recess of a boring bar, the holder abutting with a rear lateral edge against the surface of the recess forming the support, while a forcing screw which is screwed into the front portion of the holder abuts against a corresponding point on the surface of the recess. If the holder is curved to some extent for radial adjustment of the cutting plate position, a horizontal swing of the holder also occurs at the same time in its front part, thus causing an undesirable change in what is known as the setting angle. In order to overcome this disadvantage, U.S. Pat. No. 3,236,125 proposes a basically different design for a tool holder. This design means that there is no resilient deformation of the holder, but a change in the clearance of one support face on the boring bar is effected by displacing a wedge piece which corresponds approximately in dimension to the holder. The wedge piece and the container have inclined faces with respect to the support face. The longitudinal adjustment of the wedge piece is carried out by means of an eccentric arrangement located in the holder.
The adjustment of this known holder takes place using a special device, for which purpose the holder must be removed from the boring bar. In the operating position, adjustment or readjustment cannot be performed on the boring bar, because the holder is screwed securely onto the boring bar together with the wedge piece, so that no relative movement between the holder and the wedge piece is then possible.
BRIEF SUMMARY OF THE INVENTION
The object of the invention is to overcome the above-referred-to existing shortcomings and disadvantages and to provide a tool of the above-described type, which permits slight radial adjustment of the cutting plate both in the assembled state and the dismantled state, without there being an unacceptable alteration in the setting angle (kappa) as it is known. The tool is furthermore simple in design and also relatively small in construction, so that it can be used where space is limited, particularly as a fine boring element. Other related problems with which the invention deals will be seen from the description which follows in conjunction with the embodiments shown in the drawings.
A tool of this type comprises a compact cassette-type unit. Its dimensions are selected so that it is also suitable for installation in restricted space. Axial adjustment can also be carried out without further action as necessary. Taking this into account the tool is however distinguished by a particularly advantageous adjustability in a radial direction, without other dimensions being affected adversely, in particular the setting angle. This is achieved by designing the holder as a parallel spring arrangement. This means any embodiment where in use there is resilient deflection of parts of the holder, the head part of which, i.e. the part supporting the cutting plate, undergoes a substantially lateral displacement.
The invention is designed in such a way that the holder is substantially unloaded in the non-deflected position and a resilient restoring force which counteracts any deflection occurs only if the adjustment device is actuated (deflected) from a zero or starting position. Particularly advantageously the holder is however already held under initial stress to rest against the base body in the non-deflected position, so that freedom from play is guaranteed from the outset. This is achieved in that the holder forming a spring is pressed against the base body during the manufacture of the rigid connection to the said base body, the desired initial stress being generated and remaining after the connection has been m
REFERENCES:
patent: 3102441 (1963-09-01), Milewski
patent: 3236125 (1966-02-01), Lundgren
patent: 3276101 (1966-10-01), Plein
patent: 3381553 (1968-05-01), Lutz
patent: 3427904 (1969-02-01), Arendt
patent: 3977194 (1976-08-01), Klee et al.
patent: 4428704 (1984-01-01), Kalokhe
Howell Daniel W.
J. Kuhn GmbH & Co. Prazisionswerkzeug KG.
Weidenfeld Gil
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