Abstract: Disclosed is a rivet nut unit. The rivet nut unit may comprise a rivet nut including a flange of which a lower surface is supported by a upper surface of a plate while riveting the plate by a riveter, a body part of which the inside of a lower part is worked to have screw threads and which is integrally formed in a cylindrical shape with a lower portion of the flange, and a hole-making head which is disengageably located on a lower end of the body part to rotate together with the rivet nut and bore an insertion hole in the plate while the riveter rotates in order to insert the body part into the plate.

Abstract: A bending press system is disclosed. The bending press system may include: at least one guide post; a slide plate mounted at a slider so as to be slidable upwardly or downwardly along the guide post; a bending die including a lower die having an upper surface and an upper die having a lower surface corresponding to the upper surface of the lower die and mounted on a lower surface of the slide plate, and adapted to bend an object supplied between the lower die and the upper die to have a predetermined curvature; and a pair of clamping means mounted respectively at both sides of the bending die corresponding to the bending die and adapted to clamp both end portions of the object.

Abstract: Disclosed is a flexible roll forming device including bases respectively disposed on opposite sides with respect to a process direction center line in a left/right direction of which rails are configured thereon along a lateral direction of the process, forward/backward moving means having a slide plate provided to be movable along the rails on the base, turning means rotatably provided to the slide plate, and roll forming means provided on the turning means to include an upper forming roll and a lower forming roll inclined with respect to the upper forming roll for subjecting a material fed thereto to flexible roll forming by using the upper and lower forming rolls while varying positions in the lateral direction of processing with the forward/backward moving means, and angles from a process direction with the turning means.

Abstract: In accordance with an exemplary embodiment of the present invention, a flexible roll forming method for roll forming a beam of a predetermined shape by bending a material fed to a plurality of roll forming units each having upper and lower forming rolls in succession, and for roll forming the beam by feeding the material to a flexible roll forming unit having upper and lower forming rolls disposed on left/right sides of a process direction and both side upper and lower forming rolls disposed to vary positions in a lateral direction of the process and angles from a process direction, respectively, to cause flexible bending of the material in succession over multiple stages, is provided.

Abstract: Disclosed is a flexible roll forming device including: bases respectively disposed on opposite sides with respect to a process direction center line in a left/right direction, each having an opening formed in an upper side thereof connected to an inside thereof, and rails configured thereon on opposite sides of the opening in a lateral direction of the process; forward/backward moving means having a slide plate provided to be movable along the rails on the base; turning means rotatably provided to the slide plate; and roll forming means provided on the turning means to include upper and lower forming rolls for subjecting a material fed thereto to flexible roll forming by using the upper and lower forming rolls while varying positions in the lateral direction of processing with the forward/backward moving means, and angles from a process direction with the turning means.

Abstract: A roof side rail is connected to a roof panel and includes a multi-sectional rail having a plurality of integrally formed ribs and bent along a shape of an upper portion of a side surface of a vehicle body, and a reinforcement rail that is combined with an inner side surface of the rail, an upper side flange is connected to the roof panel, and a lower side flange is engaged with a weather strip.

Abstract: A mounting unit for a sub-frame of a vehicle is provided. The mounting unit is used for engaging a front side member with the vehicle's sub-frame. The mounting unit includes a welding seat that is formed as a groove on a lower side of the front side member. The mounting unit further includes a mounting nut assembled with the front side member, a welding flange integrated with an external circumference and a head of the mounting nut and inserted into the welding seat to be combined with the welding seat, and a member seat that is formed outside the welding flange and with which a fender upper connecting member is combined.

Abstract: A self-piercing rivet is disclosed. The self-piercing rivet integrally joins an upper plate member and a lower plate member overlapping each other. The self-piercing rivet includes a head portion, a shank portion integrally connected with the head portion, a plurality of ribs formed to an external circumferential surface of the shank portion along a length direction of the shank portion in a spiral form, and at least one stopper protrusion protruded from a lower portion of the head portion.

Abstract: The present invention relates to a rear suspension system of a coupled torsion beam which comprises a torsion beam and trailing arms connected to ends of the torsion beam by welding, wherein a gap with a predetermined length is formed between the torsion beam and the trailing arm.

Abstract: A self-piercing rivet is disclosed. The self-piercing rivet integrally joins an upper plate member and a lower plate member overlapping each other. The self-piercing rivet includes a head portion, a shank portion integrally connected with the head portion, and a plurality of ribs formed to an external circumferential surface of the shank portion along a length direction of the shank portion in a spiral form.

Abstract: A self-piercing rivet is disclosed. The self-piercing rivet integrally joins an upper plate member and a lower plate member overlapping each other. The self-piercing rivet includes a head portion, a shank portion integrally connected with the head portion and a plurality of ribs formed to an external circumferential surface of the shank portion along a length direction of the shank portion in a spiral form, wherein a drive slot is formed to upper portion of the head portion.

Abstract: A roll forming system which roll-forms a shaped beam by a roll forming unit including a plurality of roll formers is disclosed. A laser welding device for the roll forming system may include: front and rear guide means disposed apart from each other at the rear of the roll forming unit, and guiding movement of the shaped beam; laser welding means mounted above and between the front and rear guide means, reciprocatedly rotating a mirror by controlling a mirror motor so as to irradiate a laser beam to a welding position of the shaped beam, and thereby forming a welding bead having a predetermined welding pattern; forming speed detecting means detecting a forming speed of the shaped beam and transmitting a signal corresponding thereto to a controller; a camera disposed at the rear of the laser welding means, photographing a welding portion of the shaped beam, and transmitting an image signal corresponding thereto to the controller.

Abstract: A self-piercing rivet is disclosed. The self-piercing rivet integrally joins an upper plate member and a lower plate member overlapped with each other. The self-piercing rivet includes: a head portion; and a shank portion integrally connected to the head portion and provided with more than two slits.

Abstract: A rotation jig device may include both side housings that are disposed at both sides, a reverse gear that is disposed inside both side housings, a groove portion, front and rear side connection gears that are engaged with the reverse gear in both side housings, front and rear side pinion gears that are disposed at the front/rear side connection gear to be rotated, a rack gear that penetrates both side housings to be engaged with the front and rear side pinion gears, an advanced/retreat cylinder that is connected to each rack gear of both side housings to move each rack gear backward or forward, and a clamping portion that is disposed at the reverse gear and rotates with the reverse gear to clamp the workpiece.

Abstract: A clamping device for a bending press includes a clamping die with a space formed therein, a clamping holder rotatably disposed within the space of the clamping die around a rotation shaft formed thereto, an upper cam block and a lower cam block respectively disposed within the clamping holder and slidable along the horizontal direction, and of which a cam slant surface is formed at a front side of the upper cam block and the lower cam block respectively, an upper clamping block and a lower clamping block contacting each cam slant surface of the upper cam block and the lower cam block, and clamping an end of a pipe disposed therebetween by sliding along a slant direction of the clamping holder, and a pressing unit selectively pressing the upper cam block and the lower cam block.

Abstract: A rotation jig device may include both side housings that are disposed at both sides, a reverse gear that is disposed inside both side housings, a groove portion, front and rear side connection gears that are engaged with the reverse gear in both side housings, front and rear side pinion gears that are disposed at the front/rear side connection gear to be rotated, a rack gear that penetrates both side housings to be engaged with the front and rear side pinion gears, an advanced/retreat cylinder that is connected to each rack gear of both side housings to move each rack gear backward or forward, and a clamping portion that is disposed at the reverse gear and rotates with the reverse gear to clamp the workpiece.

Abstract: A method of assembling a sub-frame of a vehicle with the front side member of the vehicle includes integrally forming a supporting end of a mounting nut that protrudes in a radial direction in a center of an external circumference of the mounting nut, forming a through hole in a lower surface of the front side member, forming a seat as a groove in an internal surface of the through hole, inserting a lower end of the mounting nut into the through hole so that the supporting end is supported by a circumference of the through hole, settling a head of the mounting nut in the seat, and welding the supporting end and the head along the circumference of the through hole and a side of the seat to assemble the sub-frame to the front side member.

Abstract: A mounting unit for a sub-frame of a vehicle is provided. The mounting unit is used for engaging a front side member with the vehicle's sub-frame. The mounting unit includes a welding seat that is formed as a groove on a lower side of the front side member. The mounting unit further includes a mounting nut assembled with the front side member, a welding flange integrated with an external circumference and a head of the mounting nut and inserted into the welding seat to be combined with the welding seat, and a member seat that is formed outside the welding flange and with which a fender upper connecting member is combined.

Abstract: A bending press system is disclosed. The bending press system may include: a base; a slider disposed above the base and moving downwardly toward the base or moving upwardly from the base; a curvature die mounted at the base and the slider, and integrated by descent of the slider such that a pipe member inserted in the curvature die is formed to have a predetermined curvature; and a pair of clamping units disposed to be rotatable by a predetermined angle corresponding to the curvature die at both sides of the base, and clamping both end portions of the pipe member.

Abstract: A roof side rail is connected to a roof panel and includes a multi-sectional rail having a plurality of integrally formed ribs and bent along a shape of an upper portion of a side surface of a vehicle body, and a reinforcement rail that is combined with an inner side surface of the rail, an upper side flange is connected to the roof panel, and a lower side flange is engaged with a weather strip.