A multi-roller system includes at least two pairs of rollers, in which the at least two pairs of rollers rotate about independent rotation axes, respectively. Changes in heights of the at least two pairs of rollers are controlled. Cross-sections of the at least two pairs of more of rollers have different shapes. The at least two pairs of rollers approach and press the battery can at intervals between the at least two pairs of rollers.

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.

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 necking-flanging roller and a necking-flanging mechanism are disclosed. The necking-flanging roller is used to form the necking portion and the flanging portion on the housing, including a roller body; and a limiting portion, arranged along the axial direction of the roller body and oppositely to the roller body, wherein a gap is formed between the roller body and the limiting portion, and the gap is provided for the free end of the flanging portion to insert therein and restricts the free end from bending and deforming. The technical solution provided in the present disclosure can improve the quality of the battery.

A processing method of a work includes: forming flange bending parts at respective side parts of the work, the flange bending parts including first bending parts extending in a length direction of the work; holding a first part of the work in the length direction where the flange bending parts are formed between a die and a pad; and pressing a second part of the work in the length direction in a thickness direction to form a second bending part extending in a width direction of the work between the first part and the second part. The die includes a supporting surface supporting the work, a first relief part including a first inclined surface, and a second relief part including a second inclined surface.

A processing method of a work includes: forming flange bending parts at respective side parts of the work, the flange bending parts including first bending parts extending in a length direction of the work; holding a first part of the work in the length direction where the flange bending parts are formed between a die and a pad; and pressing a second part of the work in the length direction in a thickness direction to form a second bending part extending in a width direction of the work between the first part and the second part. The die includes a supporting surface supporting the work, a first relief part including a first inclined surface, and a second relief part including a second inclined surface.