Metal working – Plural diverse manufacturing apparatus including means for... – Common reciprocating support for spaced tools
Patent
1982-01-06
1985-05-07
Weidenfeld, Gil
Metal working
Plural diverse manufacturing apparatus including means for...
Common reciprocating support for spaced tools
29 52, 29 26A, 211 15, B23Q 3157
Patent
active
045148929
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a machine tool and, more particularly, to a machine tool having a gate-type construction, provided with an improved tool magazine.
BACKGROUND ART
Such a machine tool is known already as having a support table mounting a workpiece and carrying a tool magazine from which necessary tools are taken out successively to effect various machinings in sequence. In the known machine tool of the kind described, as shown, for example, in the specification of U.S. Pat. No. 3,709,623, the tool magazine is placed at one end of the support table so as not to hinder the machining of the workpiece, so that the support table is made to travel a distance greater than the stroke necessary for the ordinary machining, when the tool is replaced. In consequence, the working space on the support table is undesirably limited by the installation of the tool magazine. The size of the support table also has to be increased to require larger sizes of devices such as bed, table feed device and so forth.
DISCLOSURE OF THE INVENTION
Under this circumstance, the present invention aims as its object at providing a gate-type machine tool in which the working space on the support table is not limited and in which the stroke of the support table is reduced to permit a reduction in the sizes of the support table and the bed, thereby to overcome the above-described problems of the prior art. To this end, according to the invention, there is provided a machine tool comprising: a bed; a gate-shaped column straddling a work support table; a spindle mounted on a cross-slide portion of the gate-shaped column and rotatable around a vertical axis; said spindle being movable in the vertical direction toward and away from the work support table and slidable horizontally perpendicularly to the direction of up and downward movement; wherein the improvement comprises a tool magazine mounted between the support portions of the gate-shaped column and above the work support table, the tool magazine including tool holders adapted to hold the tools of the tool magazine such that the axes of the tools are arranged to extend in the vertical direction and to be in parallel alignment with the sliding direction of the spindle, and a driving device for driving the tool holder in the direction perpendicular to the directions of vertical movement and horizontal sliding of the spindle thereby to bring the tool between a tool mounting/demounting position where the tool aligns with the slide position of the spindle and a position where the tool does not interfere with the spindle.
As stated above, according to the invention, a tool magazine is mounted between the support portions of the gate-shaped column, so that it is possible to make efficient use of the working space on the work support table and to eliminate unnecessary stroke of the work support table. In consequence, the size of the work support table, as well as the size of the bed, can be reduced advantageously.
Furthermore, since the tools on the tool magazine are arranged such that their axes extend in the vertical direction and are in parallel alignment with the direction of sliding of the spindle, it is possible to bring the necessary tool into axial alignment with the spindle by making use of the horizontal sliding movement of the spindle, and to make the mounting and demounting of the tool by making use of the vertical movement of the spindle. It is, therefore, possible to effect a change of the tool without fail by a simple construction.
In the second and third embodiments, the tool holders are mounted shiftably so that it is possible to store and use a larger number of tools even when the slide stroke of the spindle is small. Particularly, in the third embodiment of the invention, it is possible to make preparatory arrangements of the tool magazine during the machining.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevational view of a first embodiment of the invention;
FIG. 2 is an elevational view of the embodiment shown in FIG. 1 as viewed
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Tsujimura Isao
Yoshimi Takani
Howell Daniel W.
Toyoda Koki Kabushiki Kaisha
Weidenfeld Gil
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