Cutting apparatus
AssigneeStanztechnik GmbH Roeder & Spengler
InventorErnst M. Spengler
Life of this patent
Estimating the term…
Abstract
This cutting apparatus includes a frame structure supporting a cutting roller and a counter pressure roller arranged at an angle relative to the feed advance direction of sheet material to be cut. Drive means are provided for the cutting roller and for the counter pressure roller in the form of a common drive chain positively interconnecting the rollers with a drive motor through an instantaneously operable clutch, such as an electro-magnetic or pneumatic clutch. A brake is provided between the cutting roller and the frame structure, whereby the control of the clutch and of the brake is such that engagement of the positive drive through the clutch disengages the brake and vice-versa.
Claims25
In an apparatus for cutting sheet material advancing in a given direction, including a frame structure, a cutting roller for cutting the sheet material substantially across said advancing direction and a counter pressure roller, each roller having a rotational axis and an outer surface, means rotatably supporting both of said rollers in said frame structure for cooperation with each other, strip steel knife means, means securing said strip steel knife means to said cutting roller, whereby said strip steel knife means extend substantially radially away from said cutting roller, said strip steel knife means following a helix around the cutting roller which extends with its longitudinal axis at an angle (.alpha.) relative to a line extending perpendicularly to said given direction, said angle (.alpha.) compensating for the fact that the strip steel knife means follow a helix, the improvement wherein, said securing means comprise a plurality of individual holding blocks releasably secured in holes in the outer surface of said cutting roller, and means releasably holding said strip steel knife means in each of said holding blocks, in which holes said holding blocks are rotatable in their released condition for adjusting the knife position, each hole having a radially extending axis which extends in the plane of said strip steel knife means when the latter are secured to the cutting roller, said apparatus further comprising journal means having a journal axis held in said frame structure, said cutting roller having frame means secured to said journal means for tilting said cutting roller about said journal axis extending substantially perpendicularly to the rotational axis of said cutting roller.
In an apparatus for cutting sheet material advancing in a given direction, including a frame structure, a cutting roller for cutting the sheet material substantially across said advancing direction and a counter pressure roller, each roller having a rotational axis an an outer surface, means rotatably supporting both of said rollers in said frame structure for cooperation with each other, strip steel knife means, means securing said strip steel knife means to said cutting roller, whereby said strip steel knife means extend substantially radially away from said cutting roller, said strip steel knife means following a helix around the cutting roller which extends with its longitudinal axis at an angle (.alpha.) relative to a line extending perpendicularly to said given direction, said angle (.alpha.) compensating for the fact that the strip steel knife means follow a helix, the improvement comprising drive means for said rollers, clutch means operatively interposed between said drive means and at least one of said rollers, and brake means operatively interposed between at least one of said rollers and said frame structure, and further comprising journal means having a journal axis held in said frame structure, said cutting roller having frame means secured to said journal means for tilting said cutting roller about said journal axis extending substantially perpendicularly to the rotational axis of said cutting roller.
In an apparatus for cutting sheet material advancing in a given direction, including a frame structure, a cutting roller for cutting the sheet material substantially across said advancing direction and a counter pressure roller, each roller having a rotational axis and an outer surface, means rotatably supporting both of said rollers in said frame structure for cooperation with each other, strip steel knife means, means securing said strip steel knife means to said cutting roller, whereby said strip steel knife means extend substantially radially away from said cutting roller, said strip steel knife means following a helix around the cutting roller which extends with its longitudinal axis at an angle (.alpha.) relative to a line extending perpendicularly to said given direction, said angle (.alpha.) compensating for the fact that the strip steel knife means follow a helix, the improvement comprising drive means for said rollers, clutch means operatively interposed between said drive means and at least one of said rollers, and brake means operatively interposed between at least one of said rollers and said frame structure, and further comprising means for securing said strip steel knife means to said cutting roller, said strip steel knife means having flat backs resting on said outer surface of said cutting roller, said securing means comprising blocks, means affixing said blocks to said cutting roller and means securing said strip steel knife means to said blocks, said blocks having a T-configuration including a support member and a cross-member connected to each other, said securing means connecting said strip steel knife means to said cross member, said affixing means comprising holes in the surface of the cutting roller, each support member extending into a respective hole, and means for clamping said support member in its hole.
In an apparatus for cutting sheet material advancing in a given direction, including a frame structure, a cutting roller for cutting the sheet material substantially across said advancing direction and a counter pressure roller, each roller having a rotational axis and an outer surface, means rotatably supporting both of said rollers in said frame structure for cooperation with each other, strip steel knife means, means securing said strip steel knife means to said cutting roller, whereby said strip steel knife means extend substantially radially away from said cutting roller, said strip steel knife means following a helix around the cutting roller which extends with its longitudinal axis at an angle (.alpha.) relative to a line extending perpendicularly to said given direction, said angle (.alpha.) compensating for the fact that the strip steel knife means follow a helix, the improvement comprising drive means for said rollers, clutch means operatively interposed between said drive means and at least one of said rollers, and brake means operatively interposed between at least one of said rollers and said frame structure, and further comprising curved support elements for said strip steel knife means, and means securing said curved support elements to the surface of said cutting roller, said curved support elements havng free edges extending circumferentially relative to said cutting roller surface, said securing means comprising clamping members overlapping said free edges, and means affixing said clamping members to said cutting roller.
In an apparatus for cutting sheet material advancing in a given direction, including a frame structure, a cutting roller for cutting the sheet material substantially across said advancing direction and a counter pressure roller, each roller having a rotational axis and an outer surface, means rotatably supporting both of said rollers in said frame structure for cooperation with each other, strip steel knife means, means securing said strip steel knife means to said cutting roller, whereby said strip steel knife means extend substantially radially away from said cutting roller, said strip steel knife means following a helix around the cutting roller which extends with its longitudinal axis at an angle (.alpha.) relative to a line extending perpendicularly to said given direction, said angle (.alpha.) compensating for the fact that the strip steel knife means follow a helix, the improvement comprising drive means for said rollers, clutch means operatively interposed between said drive means and at least one of said rollers, and brake means operatively interposed between at least one of said rollers and said frame structure, said drive means for said rollers comprising a motor, gear means driven by said motor and a chain drive provided in common for both of said rollers, said chain drive positively interconnecting said rollers with said motor to said gear means.
In an apparatus for cutting sheet material advancing in a given direction, including a frame structure, a cutting roller for cutting the sheet material substantially across said advancing direction and a counter pressure roller, each roller having a rotational axis and an outer surface, means rotatably supporting both of said rollers in said frame structure for cooperation with each other, strip steel knife means, means securing said strip steel knife means to said cutting roller, whereby said strip steel knife means extend substantially radially away from said cutting roller, the improvement wherein said securing means comprise a plurality of holes extending radially through the outer circumference of said cutting roller, each of said means securing said strip steel knife means further comprising a separate holding block, each having a rotational axis, releasably held in each of a plurality of said holes, said holding blocks having projections fitting into said holes and means securing said projections in said holes, each holding block being rotatable in its released condition, said holding blocks being spaced apart axially of said cutting roller, and means for releasably holding said strip steel knife means in each of said holding blocks, said strip steel knife means defining a plane which coincides with the rotational axes of all of its holding blocks.
Dependencies are inferred from the claim text.