Apparatus for roll stamping

Patent metadata

Field	Value
Publication number	US-12434288-B2
Application number	US-202118025259-A
Country	US
Kind code	B2
Filing date	Aug 27, 2021
Priority date	Sep 17, 2020
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

An apparatus for roll stamping that is capable of expanding a shape range of a product without limitation due to, for example, a radius of curvature or a height of a variable section includes: an inclined roll set including a first rotation roll and a second rotation roll rotating while facing each other, have fixed positions and angles, and are inclined with respect to a traveling material, in which a first forming portion for forming the material is formed on an outer surface of the first rotation roll, the first forming portion includes a first circumferential groove portion inclined at an oblique angle rather than a right angle with respect to a rotation shaft of the first rotation roll.

First claim

The invention claimed is:

1. An apparatus for roll stamping, the apparatus comprising:
an inclined roll set including a first rotation roll and a second rotation roll rotating while facing each other, wherein each of the first rotation roll and the second rotation roll having a fixed position and an angle inclined with respect to a traveling direction of a material,
wherein a first forming portion for forming the material is formed on an outer surface of the first rotation roll,
the first forming portion includes a first circumferential groove portion inclined at an oblique angle rather than a right angle with respect to a rotation shaft of the first rotation roll,
a second forming portion for forming the material is formed on an outer surface of the second rotation roll,
the second forming portion includes a first circumferential protrusion part inclined at an oblique angle rather than a right angle with respect to a rotation shaft of the second rotation roll, and
the first forming portion and the second forming portion have shapes corresponding to each other and registering with each other,
the inclined roll sets are arranged in plural at predetermined intervals from each other in the traveling direction of the material,
wherein in a case in which a number of inclined roll sets is plural, the inclined roll sets are arranged in such a way as to be misaligned on opposite sides based on a center of the material in a width direction in such a way as not to interfere with each other.

2. The apparatus of claim 1 , wherein the rotation shaft of the first rotation roll and the rotation shaft of the second rotation roll are parallel to each other, are not parallel to a horizontal plane of the material, and are inclined with respect to the horizontal plane at a predetermined inclination angle.

3. The apparatus of claim 2 , wherein a generatrix line of the outer surface of the first rotation roll is inclined with respect to a center line of the rotation shaft of the first rotation roll at the inclination angle, and
a generatrix line of the outer surface of the second rotation roll is inclined with respect to a center line of the rotation shaft of the second rotation roll at the inclination angle.

4. The apparatus of claim 1 , wherein the first forming portion further includes a second circumferential protrusion part that is adjacent to the first circumferential groove portion and has a predetermined angle with respect to the rotation shaft of the first rotation roll,
the second forming portion further includes a second circumferential groove portion that is adjacent to the first circumferential protrusion part and has a predetermined angle with respect to the rotation shaft of the second rotation roll, and
the second circumferential protrusion part and the second circumferential groove portion are formed to correspond to each other.

5. The apparatus of claim 1 , wherein a transition part connecting the first circumferential groove portion is formed on a first side of the first rotation roll, and
a transition part connecting the first circumferential protrusion part is formed on a first side of the second rotation roll.

6. The apparatus of claim 5 , further comprising avoiding parts which are provided on a second side of the first rotation roll and a second side of the second rotation roll and between which the material passes without being subjected to formation.

7. The apparatus of claim 6 , wherein the avoiding part is formed on a side opposite to the transition part and has a predetermined length in a circumferential direction of the rotation roll.

8. The apparatus of claim 6 , wherein in the avoiding part, a radial distance from a center line of the rotation shaft of the first rotation roll or the second rotation roll to the outer surface of the rotation roll at an arbitrary point on the center line is shorter than a natural radius of the rotation roll centered on the point.

9. The apparatus of claim 6 , wherein the avoiding part is formed to be recessed toward the rotation shaft from the outer surface of the first rotation roll or the second rotation roll.

10. The apparatus of claim 1 , further comprising a horizontal roll set including a third rotation roll and a fourth rotation roll rotating while facing each other, have fixed positions and angles, and are horizontally arranged,
wherein the third rotation roll includes at least one engraved forming portion formed to have a variable section along a circumference on an outer surface of the third rotation roll, and
the fourth rotation roll includes at least one embossed forming portion formed to have a variable section along a circumference on an outer surface of the fourth rotation roll in such a way as to correspond to the engraved forming portion.

11. The apparatus of claim 10 , wherein the third rotation roll and the fourth rotation roll each further include an avoiding part formed to have a predetermined length in a circumferential direction of the rotation roll to make the material pass without being subjected to formation.

12. The apparatus of claim 10 , wherein a plurality of horizontal roll sets are disposed upstream of the plurality of inclined roll sets in the travelling direction of the material.

Assignees

• Posco Co Ltd

Inventors

• Kim Don-Gun
• Cha Myung-Hwan

Classifications

• B21D5/08

  making use of forming-rollers (B21D5/12 takes precedence) · CPC title

• B21D37/10

  Die sets; Pillar guides · CPC title

• B21D5/083 Primary

  for obtaining profiles with changing cross-sectional configuration · CPC title

• B21D22/08 Primary

  with die parts on rotating carriers · CPC title