US 5,092,151 A · Sheet workpiece bending machine

Abstract

The press is of the type including a pair of tool-holders mounted in a frame and carrying cooperating tools (die and punch). At least one of the tool-holders is motor-driven and is movable towards the other tool-holder. According to the invention, the press includes first drive means arranged to make one of the tool-holders travel a fairly long distance towards the other tool and second drive means, distinct from the first, for making this same tool-holder or the other tool-holder perform a subsequent, fairly-short working stroke to bend the sheet metal and to effect any coining of the bend. Preferably both of the tool-holders are movable, the second drive means being arranged to make the respective tool-holder complete a fairly short bending stroke, and the press includes third drive means, distinct from the first and second, arranged to make the same tool-holder and the other tool-holder complete a virtual stroke for coining the bend.

Claims11

Dependent claims

A sheet workpiece bending machine for bending workpieces in both initial and final stages, comprising:

a frame;
upper and lower bending tools supported on the frame, free to relatively move toward and away from each other for bending a sheet workpiece interposed therebetween;
a first drive means for relatively moving at high speed one of the upper bending tool and the lower bending tool towards and away from the other, when the spacing between the upper and the lower bending tools is relatively large;
and
a second drive means for relatively moving with precision one of the upper bending tool and the lower bending tool toward and away from the other, when the spacing between the upper and lower bending tools is relatively small;
said second drive means comprising:
a first slide member supported on the frame, free to move in a vertical direction;
engage/disengage means capable of causing a tool support member for supporting the upper or lower bending tool, to engage with or disengage from the first slide member;
means for moving the first slide member in a vertical direction;
and
a third drive means for performing a coining process in the final stages of a bending process.

8 more elements

A sheet workpiece bending machine comprising:

a frame;
upper and lower bending tools supported on the frame, free to relatively move toward and away from each other for bending a sheet workpiece interposed therebetween;
a first drive means for relatively moving at high speed one of the upper bending tool and the lower bending tool towards and away from the other, when the spacing between the upper and the lower bending tools is relatively large;
and
a second drive means for relatively moving with precision one of the upper bending tool and the lower bending tool toward and away from the other, when the spacing between the upper and lower bending tools is relatively small;
said second drive means comprising:
a first slide member supported on the frame, free to move in a vertical direction;
engage/disengage means capable of causing a tool support member for supporting the upper or lower bending tool, to engage with or disengage from the first slide member;
and
means for moving the first slide member in a vertical direction;
wherein the first slide member is supported on an elastic member mounted on the frame, and the first drive means comprises motor means supported on the first slide member and means provided between the motor means and the tool support member for imparting a driving force of the motor means to the tool support member when the tool support member disengages from the first slide member.

8 more elements

Dependencies are inferred from the claim text.

Sheet workpiece bending machine

Life of this patent

Sheet workpiece bending machine

Life of this patent

Abstract

Claims11