Metal working – Plural diverse manufacturing apparatus including means for... – Binding or covering and cutting
Patent
1992-01-10
1992-12-08
Briggs, William
Metal working
Plural diverse manufacturing apparatus including means for...
Binding or covering and cutting
83552, 21912167, 266 65, B23P 2304, B23K 2600, B26D 502
Patent
active
051686104
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
This invention relates to a composite machine tool wherein a workpiece can be subjected to die-punching, cutting, boring or tapping work by one set thereof.
BACKGROUND OF THE INVENTION
A turret puch press has heretofore been used to punch a plate-shaped workpiece.
Further, laser working units or plasma working units are used to cut plate-shaped workpieces, and also complex machine tools comprising a turret punch press having a plasma torch mounted thereon have already been put to practical use.
In the above-mentioned complex machine tools, upon mounting the plasma torch on the turret punch press, to prevent the turret of the turret punch press from interfering with the plasma torch, a center "b" which is a plasma torch applying position is out of place from a punching center "a" which is a turret punch press applying position, as shown in FIG. 7.
In case the plasma machining tool is mounted on the turret puch press in the conventional complex machine tool, since the movement of a movable table adapted to hold a workpiece thereon is controlled on the basis of the punching centre, the range of movement of the workpiece is limited relative to the plasma torch mounted so as to conduct working at the position "b" which is out of place from the punching center "a" so that small-sized turret punch presses have been disadvantageous in that it is difficult to mount a plasma torch thereon.
SUMMARY OF THE INVENTION
The present invention has been contemplated in view of the above-mentioned circumstances, and has for its object to provide a complex machine tool wherein the punching center is coincident with the cutting work position so that the movable range of a workpiece is not limited even during the cutting work.
Another ojbect of the present invention is to provide a complex machine tool provided with a protecting means for preventing the dross and the heat developed by the plasma arc from giving ill effect on the turret and the members mounted adjacent thereto during the workpiece cutting work using the plasma torch.
To achieve the above-mentioned objects, according to a principal aspect of the present invention, there is provided a complex machine tool comprising: a substantially c-shaped frame forming the machine tool body, circular disc-shaped upper and lower turrets mounted on the upper and lower sides, respectively, of the frame in opposed relationship with each other and adapted to be rotated in synchronism with each other by an indexing motor, a plurality of pairs of punches and dice mounted on the upper and lower turrets, respectively, at regular intervals along the circumference thereof, and a striker means mounted on the frame above a predetermined fixed working position, whereby a workpiece is subjected to die-punching work between a pair of punch and die which is selected from among the pairs of punches and dice and indexed to the working position by the indexing motor, characterized by further comprising a plasma torch mounted on the machine tool body near the working position and arranged to be movable freely such that it can be withdrawn from the working position when the workpiece is subjected to die-punching work, and proceeded to the working position when the workpiece is subjected to cutting work.
According to a second aspect of the present invention, there is provided a complex machine tool as set forth in the above-mentioned main aspect, characterized by further comprising a protecting means for protecting the upper turret and members adjacent to the working position from the dross and the heat developed by plasma arc during the workpiece cutting work by the plasma torch.
According to a third aspect of the present invention, there is provided a complex machine tool as set forth in the above-mentioned third aspect, characterized in that the protecting means is comprised of a protection plate mounted on the lower turret and having a tapered through-hole formed therein at a location corresponding to the working position and which increases gradually in dia
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Ichimura Masaaki
Sawamura Hitoshi
Tamaki Hiroaki
Briggs William
Kabushiki Kaisha Komatsu Seisakusho
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