Cutting – Rotatable disc tool pair or tool and carrier – Tool pair comprises rotatable tools
Patent
1992-07-17
1994-03-29
Rada, Rinaldi
Cutting
Rotatable disc tool pair or tool and carrier
Tool pair comprises rotatable tools
834254, 83503, 83504, 835082, 83665, B23D 1904, B26D 726
Patent
active
052974642
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to rotary shears for dividing sheet metal bands or sheet metal panels into several strips.
BACKGROUND OF THE INVENTION
In known rotary shears of this type (leaflet of the Fagor company from "MM Maschinenmarkt", No. 29/1989), each blade shaft is surrounded by a sleeve, on which the roller blades are axially positionable. The sleeve can be expanded due to hydraulic medium introduced between the blade shaft and the sleeve and this causes the roller blades to be clamped on the blade shaft. This has the disadvantage that all the roller blades are always either clamped on the blade shaft or displaceable thereon when unclamped. It must therefore be feared, in particular, that when a roller blade is positioned, it will alter its position again, for example due to vibrations of the machine, so that, finally, exact distances between the roller blades cannot be set. Moreover, the manipulator of the known rotary shears is designed such that the roller blades of the lower blade shaft can be adjusted only by taking along the roller blades on the upper blade shaft and the manipulator, when the roller blades on the upper blade shaft are to be adjusted individually, must perform a lifting movement in order to get free of the roller blades of the lower blade shaft. This means that the positioning of the roller blades on their blade shafts is time-consuming and complicated.
SUMMARY OF THE INVENTION
The object of the invention is to improve rotary shears of the generic type such that the positioning of the roller blades on their blade shafts can be carried out quickly and simply by the manipulator and the roller blades can no longer leave the positions they have taken up as long as additional roller blades are being adjusted on the blade shaft.
BRIEF DESCRIPTION OF THE DRAWINGS
The following description of preferred embodiments of the invention serves to explain the invention in greater detail in conjunction with the attached drawings. In the drawings,
FIG. 1 is a schematic front view of rotary shears;
FIG. 2 is a sectional view along line 2--2 in FIG. 1;
FIG. 3 is a sectional view along line 3--3 in FIG. 1;
FIG. 4 is a schematic plan view of a manipulator with associated roller blade according to line 4--4 in FIG. 1;
FIG. 5 is an axial sectional view of a mechanical roller blade clamping means;
FIG. 6 is an axial sectional view of a hydraulic roller blade clamping means;
FIG. 7 is a front view of the clamping means of FIG. 6;
FIG. 8 shows a preferred roller blade arrangement and
FIG. 9 shows a different, preferred roller blade arrangement.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The rotary shears 1 illustrated schematically in FIG. 1 comprise a machine frame 2 with two blade shafts 5, 6 rotatably mounted in stands 3, 4 of this frame. The blade shafts are adjustable relative to one another in a manner to be described so that the distance between them can be set. The (in FIG. 1) lower blade shaft 6 is drivable directly via a drive pulley 7 in the known manner by a motor (not illustrated) which is mounted in the machine frame 2.
As shown in FIG. 2, gear wheels 8 and 9 are seated in the region of the stand 3 on the blade shafts 5 and 6, respectively. These wheels are connected in the manner of gears by additional gear wheels 11, 12 mounted on the stand 3 such that when the lower blade shaft 6 is driven via the drive pulley 7 the upper blade shaft 5 is taken along in the opposite direction of rotation. As also shown in FIG. 2, the upper blade shaft 5 is vertically displaceable in the stand 3 by means of a carriage 13 so that the relative distance to the lower blade shaft 6 can be adjusted. The same applies for the stand 4, in which the upper blade shaft 5 is also mounted for adjustment by means of a carriage. The displacement of the upper blade shaft 5 by the specified carriages 13 is so slight that the gear wheels 8, 11 do not become disengaged and therefore can always drive both blade shafts 5 and 6.
Roller blades 14 are arranged on the blade shafts 5 and 6 and these rot
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Lockmann, Hans Werner "Fachberichte Huttenpraxis Metallweiterverarbeitung," 1978, pp. 652 to 656.
Rada Rinaldi
Reinhardt Machinenbau GmbH
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