Metal deforming – With means to drive tool – With means to selectably control movement of tool
Patent
1994-04-19
1996-01-16
Jones, David
Metal deforming
With means to drive tool
With means to selectably control movement of tool
72404, 72446, 72472, B21D 3704
Patent
active
054838142
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for working metal workpieces, comprising a frame, a rotatable tool turret movable up and down and carrying a plurality of punch tools which can be moved into a working position by rotation of the tool turret, and a die carrier carrying die tools associated with said punch tools.
A known apparatus of this type is described in GB-A-2 130 132. In this known apparatus the die tools are supported by a stationary tool support. Upon rotation of the tool turret a frame section of the apparatus moves with respect to this stationary tool support, whereby the construction of this known apparatus is complicated.
According to the invention a simple construction is obtained in that the frame is provided with a corresponding stationary rotatable tool turret as carrier for the die tools which can be moved into a corresponding working position by rotation of said tool turret.
According to a favourable embodiment of the invention each tool turret comprises a detector for detecting the rotational position of the tool turret, wherein both detectors only enable the movement of the tool turret movable up and down if corresponding punch and die tools are located in the working position. In this manner errors due to an incorrect adjustment are prevented.
As an alternative both tool turrets are coupled with each other in such a manner that upon rotation of one tool turret the other tool turret is also rotated such that in each rotational position corresponding punch and die tools are located in the working position.
If such an apparatus is provided with a main plate movable up and down, it is to be preferred according to the invention that the main plate carries the tool turret movable up and down.
The invention will be further explained by reference to the drawings in which an embodiment of the apparatus according to the invention is schematically shown.
FIG. 1 is a side view of an embodiment of the apparatus according to the invention.
FIG. 2 is a front view of the apparatus of FIG. 1.
FIG. 3 is a top view of the apparatus of FIG. 1.
FIG. 4 shows in a larger scale a detail of the apparatus of FIG. 1.
FIG. 5 is a section according to the line V--V of FIG. 4.
FIG. 6 is a section of the stationary tool turret of the apparatus of FIG. 1.
FIG. 7 is a section according to the line VII--VII in FIG. 1.
FIG. 8 is a side view of a second embodiment of the apparatus according to the invention.
FIG. 9 is a back view of the apparatus of FIG. 8.
FIG. 10 is a side view partially shown of a third embodiment of the apparatus according to the invention.
FIG. 11 is a partially shown top view of the apparatus of FIG. 10.
FIG. 12 is a side view of a fourth embodiment of the apparatus according to the invention.
The apparatus shown in FIG. 1-3 for working metal workpieces comprises a frame 1 made of two web plates 2 joining a base plate 3. A main plate 4 movable up and down is guided between the web plates 2 and is driven by a hydraulic cylinder piston assembly 5 mounted at the top side of the apparatus on the web plates 2. The head of a bolt 6 can be seen in FIG. 1, by means of which the main plate 4 is connected with the piston not shown of the cylinder piston assembly 5. The main plate 4 is enclosed between fixed guiding blocks 7 at the front side of the apparatus and adjustable guiding blocks 8 at the back side and the lower centre part of the apparatus, respectively. Suitable sliding elements can be provided between the guiding blocks 7, 8 and the main plate 4.
The apparatus further comprises a carrier plate 9 pivotably borne in the frame 1 and connected to the main plate 4 by a bearing 10. The carrier plate 9 is therefore also driven through the main plate 4 by the cylinder piston assembly 5.
As shown in detail in FIG. 4 and 5, the carrier plate 9 comprises a substantially triangular shear blade 11, the straight triangle sides of which enclose a right angle and form the cutting edges 12 of the shear blade 11 extending substantially horizontally and vertically, respectively. The frame 1 supports a stationary
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patent: 4144736 (1979-03-01), Honda
patent: 4545233 (1985-10-01), Peddinghaus
patent: 4662207 (1987-05-01), McDonald
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