Metal deforming – With means to drive tool – Including link-actuated tool support
Patent
1990-08-15
1991-07-30
Jones, David
Metal deforming
With means to drive tool
Including link-actuated tool support
72451, 100280, 2924358, B21D 500, B21D 3902
Patent
active
050351362
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to apparatus for bending a margin flange, which projects at an angle to a workpiece surface against said surface, said apparatus including a preliminary bending tool which is mounted on a first tool holder carried by a linkage mechanism for movement in relation to a stand which is stationary relative to a support surface on which the workpiece is placed, and further including a hand finishing or clinching tool mounted on a second tool holder which is carried by a parallelogram linkage for movement in relation to the stand, and also a drive arrangement which is connected drivingly to said two tool holders.
Apparatus of this kind are previously known and are used for bending an upstanding margin flange on one plate or panel around a margin of another plate or panel, to provide therewith a clinching or hemming joint between the two plates or panels. Such operations are common for instance in the vehicle manufacture industry, in the production of different vehicle body parts.
The object of the present invention is to provide an improved apparatus of the aforesaid kind. This object is achieved in that the linkage mechanism between the first tool holder and the stand is a parallelogram linkage mechanism which is arranged such that an imaginary connecting line between the stand-carried pivot axes of the links of said linkage mechanism extends substantially at right angles to an imaginary connecting line between the stand-carried pivot axes of the links of the parallelogram linkage of the second tool holder; and in that the drive arrangement includes a single drive member which is connected between the stand and a link in the parallel-ogram linkage of the second tool holder such as to drive said second tool holder, and a drive link which is connected between the parallelogram linkage of the second tool holder and the first tool holder, such as to drive said first tool holder.
The invention will now be described in more detail with reference to the accompanying drawings, in which
FIG. 1 is a somewhat schematic side view of bending apparatus constructed in accordance with the invention:
FIG. 2 is a schematic side view of the apparatus of FIG. 1 and illustrates the apparatus components in their respective starting positions. prior to commencing a working sequence;
FIG. 3 is a schematic side view of the apparatus of FIG. 1 and illustrates the apparatus components in their respective preliminary bending or pre-form positions, during a working sequence; and
FIG. 4 is a schematic side view of the apparatus of FIG. 1 and illustrates the apparatus components in their respective bend finishing or clinching position.
The illustrated bending apparatus comprises a stand 1 which is supported on a support surface 2, of which only a small part is shown and which supports a workpiece 3. The illustrated workpiece 3 is a sheet metal rail having an upstanding margin flange 4, which in the FIG. 2 illustration extends upwards from the major part of the workpiece, and which in FIG. 3 is shown in a preliminarily bent position and in FIG. 4 is shown in its fully bent or clinching position. The workpiece 3 may be elongated at right angles to the plane of the drawing and may therewith be straight or curved.
Bending of the margin flange 4 from the starting position illustrated in FIG. 2 to the pre-bend position illustrated in FIG. 3 is effected with the aid of a preliminarily bending or pre-bend tool 5, whereas continued bending of the margin flange 4, from the pre-bend position shown in FIG. 3 to the clinching position shown in FIG. 4 is effected with the aid of a bend finishing or clinching tool 6. When viewed at right angles to the plane of the drawing, both the pre-bend tool 5 and the clinching tool 6 have a shape which corresponds to the shape of the workpiece 3, so that the tools are able to co-act with the margin flange 4 over the whole of its length.
The pre-bend tool 5 is mounted on a first tool holder 7, which is connected to the stand 4 by means of two links 8 and 9. The links 8 and 9 are of mutually
REFERENCES:
patent: 4346579 (1982-08-01), Takatsu
patent: 4706489 (1987-11-01), Dacey, Jr.
AB Volvo
Jones David
LandOfFree
Bending apparatus for bending a margin flange does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bending apparatus for bending a margin flange, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bending apparatus for bending a margin flange will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1536061