Roller hemming processing method and roller hemming processing device

Patent metadata

Field	Value
Publication number	US-10758958-B2
Application number	US-201816158409-A
Country	US
Kind code	B2
Filing date	Oct 12, 2018
Priority date	Oct 16, 2017
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

A roller hemming processing device that has first to fifth processing surfaces and that rolls the respective processing surfaces while pressing the respective processing surfaces against a hemming flange in such a posture that an axis of a roller is parallel to an outer panel is used. A pre-processed portion obtained by bending the hemming flange to form a right angle with an inner flange is molded by using the third, fifth and fourth processing surfaces in a stepwise manner such that the angle of inclination with respect to the axis decreases. The pre-processed portion is inclined toward an inner panel side by using the second processing surface. An inclined wall portion that is inclined to contact the inner panel, and a hem portion that is in close contact with the inner panel are molded by simultaneously using the first and second processing surfaces.

First claim

What is claimed is:

1. A roller hemming processing method for bending a first flange provided at an edge portion of a first panel in such a manner as to envelop a second flange provided at an edge portion of a second panel stacked on the first panel and having a shorter length than the first flange, by rolling processing surfaces of a roller portion pressed against the first flange along the first flange, through use of a roller that is constituted of the roller portion and a shaft portion parallel to an axis of the roller, comprising:
preparing a roller hemming processing device that has a plurality of processing surfaces including at least a first processing surface parallel to the axis of the roller, a second processing surface that is inclined from the first processing surface toward a side of the shaft portion at a predetermined angle with respect to the axis of the roller, and two or more tapered processing surfaces that are inclined toward a leading end side of the roller at different angles with respect to the axis of the roller respectively, and that rolls the respective processing surfaces while pressing the respective processing surfaces against the first flange in such a posture that the axis of the roller is parallel to the first panel, and fixing the second panel to the first panel stacked on the second panel such that the first flange and the second flange overlap with each other, as a first process;
pressing a plurality of selected processing surfaces other than the second processing surface against a region of the first flange that protrudes from the second flange in a stepwise manner such that an angle of inclination with respect to the axis of the roller decreases, and molding a pre-processed portion that is obtained by bending the region toward a side of the second flange in such a manner as to form a right angle with the second flange, as a second process;
pressing the second processing surface against the pre-processed portion, and inclining the pre-processed portion toward a side of the second panel within such a range as not to come into contact with the second panel, as a third process; and
simultaneously pressing the first processing surface and the second processing surface against the inclined pre-processed portion, and molding the inclined pre-processed portion into an inclined wall portion that is inclined at the predetermined angle and that has a leading end abutting on the second panel, and a hem portion that extends from a leading end portion of the inclined wall portion and that is in close contact with the second panel, as a fourth process.

2. The roller hemming processing method according to claim 1 , wherein
a first pressing amount by which the second processing surface is pressed against the pre-processed portion in the third process is smaller than a second pressing amount by which the first processing surface and the second processing surface are pressed against the inclined pre-processed portion in the fourth process.

3. The roller hemming processing method according to claim 1 , wherein
the first panel is an outer panel of a vehicular sun roof in which an opening portion is formed,
the second panel is an inner panel of the vehicular sun roof, and
the first flange and the second flange are provided at edge portions that define the opening portion, respectively.

4. A roller hemming processing device that bends a first flange provided at an edge portion of a first panel in such a manner to envelop a second flange provided at an edge portion of a second panel stacked on the first panel and having a shorter length than the first flange, by rolling processing surfaces of a roller portion pressed against the first flange along the first flange, comprising:
a fixing portion that is configured to fix the second panel to the first panel stacked on the second panel such that the first flange and the second flange overlap with each other;
a roller that is constituted of the roller portion and a shaft portion parallel to an axis of the roller, and that has a plurality of processing surfaces including at least a first processing surface parallel to the axis of the roller, a second processing surface that is inclined from the first processing surface toward a side of the shaft portion at a predetermined angle with respect to the axis of the roller, and two or more tapered processing surfaces that are inclined toward a leading end side of the roller at different angles with respect to the axis of the roller respectively, as the processing surfaces; and
a moving portion that is configured to select a processing surface for use from the plurality of the processing surfaces, and move the roller while pressing the selected processing surface against the first flange in such a posture that the axis of the roller is parallel to the first panel, wherein
the moving portion is configured to
press a plurality of selected processing surfaces other than the second processing surface against a region of the first flange that protrudes from the second flange in a stepwise manner such that an angle of inclination with respect to the axis of the roller decreases, in molding a pre-processed portion that is obtained by bending the region toward a side of the second flange in such a manner as to form a right angle with the second flange,
press the second processing surface against the pre-processed portion, in inclining the pre-processed portion toward a side of the second panel within such a range as not to come into contact with the second panel, and
simultaneously press the first processing surface and the second processing surface against the inclined pre-processed portion, in molding the inclined pre-processed portion into an inclined wall portion that is inclined at the predetermined angle and that has a leading end abutting on the second panel, and a hem portion that extends from a leading end portion of the inclined wall portion and that is in close contact with the second panel.

5. The roller hemming processing device according to claim 4 , wherein
a first pressing amount by which the second processing surface is pressed against the pre-processed portion in inclining the pre-processed portion toward the side of the second panel is set smaller than a second pressing amount by which the first processing surface and the second processing surface are pressed against the inclined pre-processed portion in molding the inclined pre-processed portion into the inclined wall portion and the hem portion.

6. The roller hemming processing device according to claim 4 , wherein
the fixing portion has a guide portion that binds a region of the first flange that overlaps with the second flange from an opposite side of the second flange, and
the moving portion is configured to move the roller while holding the roller in contact with the guide portion in molding the pre-processed portion.

7. The roller hemming processing device according to claim 4 , wherein
the roller has a first roller portion that is provided on one side of the shaft portion, and a second roller portion that is provided on another side of the shaft portion,
the first processing surface, the second processing surface, and a third processing surface as one of the tapered processing surfaces, which is inclined from the first processing surface toward a leading end side at a first angle with respect to the axis of the roller, are formed on the first roller portion, whereas a fourth processing surface parallel to the axis of the roller and a fifth processing surface as one of the tapered processing surfaces, which is inclined from the fourth processing surface toward the leading end side at a second angle with respect to the axis of the roller, are formed on the second roller portion, and
the first angle

Assignees

• Toyota Motor Co Ltd
• Takatsu Mfg Co Ltd

Inventors

• Tsukamoto Jiro
• Matsui Tamito
• Yamashita Yuichi
• Kume Tsukasa
• Suzuki Kazumoto
• Mizutani Atsushi

Classifications

• B21D39/023

  using rollers · CPC title

• B21D43/08

  by rollers {(B21D43/145 takes precedence)} · CPC title

• B21D43/003

  Positioning devices (B21D28/04 and B21D28/265 take precedence; stops B21D43/26; centering moving strips B21D43/023) · CPC title

• B21D19/043 Primary

  for flanging edges of plates · CPC title

• B21D37/145

  Die storage magazines · CPC title