Metal working – Plural diverse manufacturing apparatus including means for... – Type of machine
Reexamination Certificate
2001-12-26
2003-10-21
Wellington, A. L. (Department: 3722)
Metal working
Plural diverse manufacturing apparatus including means for...
Type of machine
C029S03300H, C029S02600B, C029S03300H, C029S057000, C029S02700R, C029S02700R, C269S020000, C269S025000, C269S058000, C082S128000
Reexamination Certificate
active
06634072
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field of the Invention
The present invention relates to a machining apparatus and equipment of a thin section long workpiece which machines the workpiece without using an exclusive-use jig. The thin section long workpiece has a constant thin section shape or has the same thin section shape at spaced positions in a longitudinal direction.
2. Description of the Related Art
Various thin workpieces of continuous lengths, which have constant section shapes as shown in
FIG. 1
, have been used as general building materials such as an aluminum sash. In this application such thin workpieces of continuous lengths are refered as “thin section long workpieces”.
These thin section long workpieces are usually formed of metal materials such as an aluminum alloy, continuously manufactured by molding means such as extrusion molding, cut in predetermined lengths, and marketed. Moreover, when the thin section long workpiece is used as the aluminum sash, the workpiece is held by an exclusive-use jig adapted to the section shape, and an attachment hole of a key or the like or a threaded hole is machined. Also in the hole machining or the threaded hole machining, a tool for exclusive use adapted to the section shape of the thin section long workpiece is used.
FIG. 2
shows some examples in which a portion to be fixed in machining is different from a portion to be machined. That is,
FIGS. 2
j
and
2
k
show that rectangular or cylindrical members or pipes are connected (fastened) to opposite ends, and
FIG. 2
l
shows a member as a machining object with diagonal lines, which has the same section shape in spaced positions in a longitudinal direction.
As described above, in a conventional art, when a hole or a threaded hole is machined in the thin section long workpiece having a constant section shape and when the workpiece shown in
FIG. 2
is machined, an exclusive-use jig or tool adapted to the section shape of the workpiece is necessary. Therefore, especially when variety of products are produced in small quantities, costs of the jig or the tool piles up, resulting in cost increase. Moreover, the jig or the tool requires long manufacturing times, and there is a problem that a total number of manufacturing period is increased. Furthermore, particularly when a small quantity of products are manufactured, a skilled worker manually machines these workpiece, therefore a dispersion of quality increases, and efficiency is disadvantageously deteriorated.
SUMMARY OF THE INVENTION
The present invention has been developed in order to solve the problem. That is, an object of the present invention is to provide machining apparatus and equipment of a thin section long workpiece, in which a side portion of the thin section long workpiece having a constant section shape or having the same section shape in spaced positions in a longitudinal direction is efficiently machined in an arbitrary shape in a short time without any exclusive-use jig or tool.
According to the present invention, there is provided a machining apparatus of a thin section long workpiece, comprising a workpiece clamp device (
10
) for horizontally holding the thin section long workpiece (
1
) having a constant section shape or having the same section shape in spaced positions in a longitudinal direction in two positions of the same section shape, wherein the workpiece clamp device (
10
) is constituted of a driving clamp device (
10
A) and a driven clamp device (
10
B) having the same holding device (
12
), the driving clamp device (
10
A) rotates the thin section long workpiece centering on a horizontal axis O extending in the longitudinal direction of the thin section long workpiece, and the driven clamp device (
10
B) follows the thin section long workpiece and idles centering on the horizontal axis.
According to the constitution of the present invention, the same holding device (
12
) disposed in both the driving clamp device (
10
A) and the driven clamp device (
10
B) can horizontally hold the thin section long workpiece (
1
) having the same section shape in two positions of the same section shape. Moreover, since the driving clamp device (
10
A) rotates the thin section long workpiece (
1
) centering on the horizontal axis O extending in the longitudinal direction of the thin section long workpiece (
1
), an arbitrary portion to be machined of the rotated thin section long workpiece can be directed in a direction for easy machining (e.g., upward direction). Furthermore, the driven clamp device (
10
B) follows the thin section long workpiece (
1
) and idles centering on the horizontal axis O so that the whole workpiece can be held constantly horizontally.
Therefore, while the thin section long workpiece is held constantly horizontally, the portion to be machined of the workpiece is directed in the direction for easy machining (e.g., upward direction), and the side portion of the workpiece can be machined efficiently by an appropriate machining tool (e.g., a drill and an end mill).
According to a preferable embodiment of the present invention, the holding device (
12
) includes: a hollow ring (
13
) supported so as to be rotatable centering on the horizontal axis O and which inner portion has a cylindrical shape; an intersecting flat member (
14
) attached to an inner portion of the hollow ring and which has two flat portions extending in parallel with the horizontal axis and crossing at some angles to each other; and a holding head (
15
) directly moved in a diametrical direction toward the intersecting flat member and freely tilted centering on an axis parallel to the horizontal axis O.
According to the constitution, the thin section long workpiece (
1
) is horizontally held through the hollow rings (
13
) of both the driving clamp device (
10
A) and the driven clamp device (
10
B), and the respective holding heads (
15
) are directly moved toward the intersecting flat member (
14
), so that the thin section long workpiece (
1
) can be held between the holding head (
15
) and the intersecting flat member (
14
).
Moreover, in this case the intersecting flat member (
14
) has two flat portions extending in parallel to the horizontal axis O and crossing at some angles to each other, and the holding head (
15
) tilts centering on the axis parallel to the horizontal axis O. Therefore, even when the thin section long workpiece (
1
) has a complicated odd-shaped section, at least three points including contact points of two flat portions and a contact point of the holding head (
15
) contact the thin section long workpiece. Therefore the thin section long workpiece (
1
) can securely be fixed in order to bear machining resistance during machining.
Furthermore, the machining apparatus includes: a machining head (
21
) having a machining tool (
2
) and a machining liquid supply device and driven centering on a vertical axis Z; and a NC driving device (
22
) for driving the machining head in a Z-axis direction, and X-axis direction and Y-axis direction crossing at right angles to the Z-axis direction with respect to the thin section long workpiece (
1
) by numerical control.
According to the constitution, the thin section long workpiece (
1
) remains to be horizontally held, the portion to be machined is directed in a direction in which the workpiece is easily machined (e.g., upward direction), and a machining liquid is supplied by the machining liquid supply device. The machining tool (
2
) attached to the machining head (
21
) is numerically controlled in three axis directions, and the portion to be machined can accurately be machined.
Furthermore, the NC driving device (
22
) includes: a Z-axis driving device (
24
) for driving the machining head (
21
) in the Z-axis direction by numerical control; an X-axis driving device (
26
) for driving the Z-axis driving device in the horizontal X-axis direction crossing at right angles to the horizontal axis O by numerical control; and a Y-axis driving device (
28
) for driving the X-axis driving device in the Y-axis direction parallel to the horizontal axis O
Iwamitsu Naoshi
Miura Takahiro
Ohmori Hitoshi
Yoshikawa Kenichi
Griffin & Szipl, P.C.
Riken
Ross Dana
Wellington A. L.
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