A roll-forming manufacturing method of a roller bearing seal case includes (a) roll-forming, from a cylindrical ring, a first profiled ring having a first section extending along cylinder axis of the cylindrical ring and a second section extending from the first section inward toward the cylinder axis, (b) applying outward pressure to the first section, in direction away from the cylinder axis, to round the first section, and (c) roll-forming a second profiled ring from the first profiled ring.

A panel hemming device includes: a fixing die on which a panel is placed and having a supporting surface stepped upward to be parallel with an end of the panel; a hemming shaft having a first side coupled to a tool and having a second side to which a hemming roller, which contacts a top of the supporting surface when fixed to the fixing die, is coupled; a rotary shaft having a first side coupled to the first side of the hemming shaft to receive torque and having a second side, which contacts a bottom of the fixing die when fixed to the fixing die; and a case supporting an outer surface of the hemming shaft disposed through the case and coupled to a first end of the rotary shaft such that the rotary shaft can rotate upward or downward with respect to the first end.

A panel hemming device includes: a fixing die on which a panel is placed and having a supporting surface stepped upward to be parallel with an end of the panel; a hemming shaft having a first side coupled to a tool and having a second side to which a hemming roller, which contacts a top of the supporting surface when fixed to the fixing die, is coupled; a rotary shaft having a first side coupled to the first side of the hemming shaft to receive torque and having a second side, which contacts a bottom of the fixing die when fixed to the fixing die; and a case supporting an outer surface of the hemming shaft disposed through the case and coupled to a first end of the rotary shaft such that the rotary shaft can rotate upward or downward with respect to the first end.

A gas-charging and flanging machine (10) includes a spin-and-press flanging device (12) for flanging a workpiece (20). The spin-and-press flanging device includes a spin-and-press mechanism (123), and the spin-and-press mechanism includes a spin-and-press wheel (123a) formed with a slant position and a flat position. The slant position is used for pressing a corresponding slant-forming position of the workpiece to form a slanted face, and the flat position is used for pressing and flattening the slanted face of the workpiece. The spin-and-press wheel displaces axially under control of an external force exerted on the spin-and-press mechanism so that a working face facing the workpiece is switchable between the slant position and the flat position. Less pressure is required for the gas-charging and flanging machine to flange a workpiece, as compared to traditional flanging machines.

An arrangement for working a tube end includes: an operating cylinder with a piston displaceable along an longitudinal axis; and a tube mounting, a tool holder being provided at an end of the piston facing the tube mounting. The operating cylinder is provided as a tandem cylinder. At least two cylinder stages are offset along the longitudinal axis. The piston includes connected piston segments, each piston segment being allocated to a cylinder stage.

An arrangement for working a tube end includes: an operating cylinder with a piston displaceable along an longitudinal axis; and a tube mounting, a tool holder being provided at an end of the piston facing the tube mounting. The operating cylinder is provided as a tandem cylinder. At least two cylinder stages are offset along the longitudinal axis. The piston includes connected piston segments, each piston segment being allocated to a cylinder stage.

A roll-forming manufacturing method of a roller bearing seal case includes (a) roll-forming, from a cylindrical ring, a first profiled ring having a first section extending along cylinder axis of the cylindrical ring and a second section extending from the first section inward toward the cylinder axis, (b) applying outward pressure to the first section, in direction away from the cylinder axis, to round the first section, and (c) roll-forming a second profiled ring from the first profiled ring.

A panel hemming device includes: a fixing die on which a panel is placed and that has a supporting surface stepped upward to be parallel with an end of the panel; a hemming shaft having a first side coupled to a tool and having a second side to which a hemming roller, which comes in contact with a top of the supporting surface when fixed to the fixing die, is coupled; a rotary shaft having a first side coupled to the first side of the hemming shaft to receive torque and having a second side coming in contact with a bottom of the fixing die when fixed to the fixing die; and a case supporting an outer surface of the hemming shaft disposed through the case and coupled to a first end of the rotary shaft such that the rotary shaft can rotate upward or downward with respect to the first end.

A panel hemming device includes: a fixing die on which a panel is placed and that has a supporting surface stepped upward to be parallel with an end of the panel; a hemming shaft having a first side coupled to a tool and having a second side to which a hemming roller, which comes in contact with a top of the supporting surface when fixed to the fixing die, is coupled; a rotary shaft having a first side coupled to the first side of the hemming shaft to receive torque and having a second side coming in contact with a bottom of the fixing die when fixed to the fixing die; and a case supporting an outer surface of the hemming shaft disposed through the case and coupled to a first end of the rotary shaft such that the rotary shaft can rotate upward or downward with respect to the first end.

A roll-forming manufacturing method of a roller bearing seal case includes (a) roll-forming, from a cylindrical ring, a profiled ring including a first section extending at least along a cylinder axis of the cylindrical ring and a second section extending from the first section inward toward the cylinder axis, and (b) trimming the second section to expand the first aperture to achieve location and geometry according to design parameters. A roll-forming manufacturing method of a roller bearing seal case includes (a) roll-forming, from a cylindrical ring, a first profiled ring having a first section extending along cylinder axis of the cylindrical ring and a second section extending from the first section inward toward the cylinder axis, (b) applying outward pressure to the first section, in direction away from the cylinder axis, to round the first section, and (c) roll-forming a second profiled ring from the first profiled ring.