Abstract: A die unit fastened to an upper part of a stamping tool has a pressure plate, a stamping die, and a die-holding plate. In order to reduce the production cost, the pressure plate is arranged between the stamping die and the die-holding plate, wherein the pressure plate acts on a shoulder of the stamping die during a stamping stroke.

Abstract: A die unit fastened to an upper part of a stamping tool has a pressure plate, a stamping die, and a die-holding plate. In order to reduce the production cost, the pressure plate is arranged between the stamping die and the die-holding plate, wherein the pressure plate acts on a shoulder of the stamping die during a stamping stroke.

Abstract: A formation tool is used for deforming sheet metal on punching machines. The formation tool has an upper or top die tool and a lower or bottom die tool. Toward the top die, there is an upper mold insert movable relative to a holding-down device, and toward the bottom die, a lower mold insert movable relative to a stripper plate. The deformation of the metal sheet is effected upward with respect to a punching stroke plane. The formation tool has a lifting device for aiding in lifting the lower mold insert from an initial position which is at or below the punch stroke plane before a deforming operation, to a level above the punching stroke plane.

Abstract: A formation tool is used for deforming sheet metal on punching machines. The formation tool has an upper or top die tool and a lower or bottom die tool. Toward the top die, there is an upper mold insert movable relative to a holding-down device, and toward the bottom die, a lower mold insert movable relative to a stripper plate. The deformation of the metal sheet is effected upward with respect to a punching stroke plane. The formation tool has a lifting device for aiding in lifting the lower mold insert from an initial position which is at or below the punch stroke plane before a deforming operation, to a level above the punching stroke plane.

Abstract: A split ring alignment ring for holding a punch has a split ring by which the alignment ring can be tightened onto the punch shaft. The alignment ring has a pair of radially aligned cut outs, on its inner circumference and are on its out circumference. A pin on the tool shaft engages the inner cut out to fix the tool against rotational movement relative to the ring. A second pin projects axially from the top of a punch point of the tool to engage the outer cut out, also to prevent rotational movement relative to the ring.

Abstract: A punching tool has a guided, axially displaceable die plunger, which is fixed against relative rotation, in a guide bushing. In a bore in its front end a punching die is seated. During the punching stroke the punching die rests against a front face of the die plunger and is axially fixed in place by means of one or several snap-in balls each of which is seated in a transverse bore, which snap-in balls are maintained in engagement with an annular groove by means of a resilient ring in the die plunger. The outer diameter of the resilient ring is only slightly less in the engagement position than the inner diameter of the guide bushing and can be resiliently widened for releasing the punching die outside of the guide bushing.

Abstract: A formation tool is used for deforming sheet metal on punching machines. The formation tool has an upper or top die tool and a lower or bottom die tool. Toward the top die, there is an upper mold insert movable relative to a holding-down device, and toward the bottom die, a lower mold insert movable relative to a stripper plate. The deformation of the metal sheet is effected upward with respect to a punching stroke plane. The formation tool has a lifting device for aiding in lifting the lower mold insert from an initial position which is at or below the punch stroke plane before a deforming operation, to a level above the punching stroke plane.

Abstract: A method and an apparatus are provided for marking a sheet-shaped workpiece using a marking tool. The marking tool is mounted in a punch holder of a punch press and a counter-support is fixed in place on a side opposite of a marking surface of the workpiece to be marked. The surface of the workpiece is marked by displacing the workpiece in its plane while engaging the marking tool with the workpiece. In one form, a support roller provides counter-support. In another form, an elastic element is cooperatively associated with the punch stroke of the punch press to translate an exactly defined contact pressure force between the tool tip and the workpiece to be marked.

Abstract: A method and an apparatus are provided for marking a sheet-shaped workpiece using a marking tool. The marking tool is mounted in a punch holder of a punch press and a counter-support is fixed in place on a side opposite of a marking surface of the workpiece to be marked. The surface of the workpiece is marked by displacing the workpiece in its plane while engaging the marking tool with the workpiece. In one form, a support roller provides counter-support. In another form, an elastic element is cooperatively associated with the punch stroke of the punch press to translate an exactly defined contact pressure force between the tool tip and the workpiece to be marked.

Abstract: A split ring alignment ring for holding a punch has a split ring by which the alignment ring can be tightened onto the punch shaft. The alignment ring has a pair of radially aligned cut outs, on its inner circumference and are on its out circumference. A pin on the tool shaft engages the inner cut out to fix the tool against rotational movement relative to the ring. A second pin projects axially from the top of a punch point of the tool to engage the outer cut out, also to prevent rotational movement relative to the ring.

Abstract: A punching tool has a guided, axially displaceable die plunger, which is fixed against relative rotation, in a guide bushing. In a bore in its front end a punching die is seated. During the punching stroke the punching die rests against a front face of the die plunger and is axially fixed in place by means of one or several snap-in balls, each of which is seated in a transverse bore, which snap-in balls are maintained in engagement with an annular groove by means of a spring washer in the die plunger. The outer diameter of the spring washer is only slightly less in the engagement position than the inner diameter of the guide bushing and can be elastically widened for releasing the punching die outside of the guide bushing.

Abstract: A method and an apparatus are provided for marking a sheet-shaped workpiece using a marking tool. The marking tool is mounted in a punch holder of a punch press and a counter-support is fixed in place on a side opposite of a marking surface of the workpiece to be marked. The surface of the workpiece is marked by displacing the workpiece in its plane while engaging the marking tool with the workpiece. In one form, a support roller provides counter-support. In another form, an elastic element is cooperatively associated with the punch stroke of the punch press to translate an exactly defined contact pressure force between the tool tip and the workpiece to be marked.

Abstract: A method and apparatus for marking a sheet metal workpiece on a punching press. A marking tool, mounted in a holder on the punching press is forced either against the surface of the workpiece, or to a depth into the surface of the workpiece. The workpiece is displaced in its plane, while engaged by the marking tool, in accordance with the desired contour. The marking tool is mounted either in the punch holder or in a holder of the workpiece table. A support roller or ball provides counter-support on the side of the workpiece opposite from the marking tool.

Abstract: A deforming tool for forming an elongated deformation in a planer workpiece includes cooperating upper and lower parts, a roller ball being mounted in one of the parts and cooperating with a mating element in the other part, the workpiece being engaged above and below by the two parts. The roller ball is mounted for universal movement and thus allows for sharper turns when moving the workpiece without the risk of damage to the workpiece.

Abstract: The punch unit comprises a punch driver connected with a punch which on its back end has a base. Furthermore, safeguarding members which keep the punch and the punch driver free of relative rotation during the stroke of the punch, and a pre-loaded compression spring which during the stroke of the punch can be compressed between the base and a guide bushing receiving the punch so that it cannot be rotated, but is axially displaceable, are part of it. To obtain a simpler and quicker assembly and disassembly of the punch it is provided that the pressure spring is maintained under pre-load in the guide bushing which is embodied as one or several pieces. A catch releasably supported on the rear end of the guide bushing and releasably engaging a recess, open toward the back, in the circumferential surface of the punch driver head prevents the punch driver head from jumping toward the back out of the guide bushing.

Abstract: The punch unit is comprised of a punch driver connected with a punch and has a base at its rear end. Securing members keep the punch and the punch driver free of relative rotation during the stroke of the punch. A pre-loaded compression spring can be compressed between the base and a guide bushing receiving the punch, so that it cannot be rotated during the stroke of the punch, but is axially displaceable.