Electric heating – Metal heating – By arc
Reexamination Certificate
2000-07-11
2002-11-19
Elve, M. Alexandra (Department: 1725)
Electric heating
Metal heating
By arc
C219S121600
Reexamination Certificate
active
06483075
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a three-dimensional linear machining apparatus capable of linear cutting on a so-called long-length member, such as a pipe and an angle, having free-curved face shape, by plasma cutting, gas cutting and laser beam cutting. Besides, the present invention relates to a clamping apparatus for a machine tool, capable of properly clamping workpieces having various kinds of sectional shapes, such as a pipe and an angle, at the time of machining with a machine tool. Besides, the present invention relates to a raw material feeding apparatus capable of properly feeding machining raw material in a machine tool, such as a laser beam machine, and a linear machining apparatus having this raw material feeding apparatus.
In recent years, a linear machining apparatus capable of cutting machining on a workpiece in the shape of a cylinder has been proposed. In case where free-curved face machining is possible on a long-length member, such as a pipe and an angle, various kinds of uses including for architecture are thinkable. But, there was no apparatus capable of successively performing laser beam cutting on a long-length member in the past, and mass production was difficult.
Then, the object of the present invention is to provide a three-dimensional linear machining apparatus capable of successively performing free-curved face cutting machining on a long-length member and easily performing mass production machining, taking the above-mentioned circumstances into consideration.
Besides, various kinds of shapes of workpieces have been machined by a machine tool, such as plasma cutting, gas cutting and laser beam cutting in the past. In such a machining, machining may be performed, clamping a workpiece by a proper clamping apparatus. But, the workpiece, such as a pipe and an angle, may have so-called modified cross sectional shape, such as L-shape, I-shape, and H-shape, in addition to round shape. But, in the past a method of properly clamping the workpiece having this modified cross sectional shape has not been established.
Then, the object of this invention is to provide a clamping apparatus for a machine tool, capable of also properly clamping the workpiece having modified cross sectional shape, taking the above-mentioned circumstances into consideration.
Besides, machining has been performed by a linear machining apparatus, such as plasma cutting, gas cutting and laser beam cutting in the past. But, a method of properly automatically feeding a long-length machining raw material with such an apparatus has not yet been established.
Then, the object of the present invention is to provide a raw material feeding apparatus capable of properly feeding long-length machining raw material and a linear processing apparatus having this raw material feeding apparatus, taking the above-mentioned circumstances into consideration.
SUMMARY OF THE INVENTION
In order to solve the above-mentioned problems, three dimensional linear machining apparatus having a machining head portion providing a machining head capable of linearly machining a long-length member along its free curved face form, and a first raw material feeding apparatus for feeding a long-length member in a first direction to said machining head portion, said three-dimensional linear machining apparatus performing a three-dimensional linear machining on a long-length member supplied said machining head portion by said raw material feeding apparatus on the basis of a machining program, said three dimensional linear machining apparatus further comprising:
said first raw material feeding apparatus having a first and a second long-length member holding means;
a holding portion for fixedly holding said long-length member in said first direction provided with said first long-length member holding means;
said second long-length member holding means provided on said machining head portion side rather than said first long-length member holding means;
a through hole through which said long-length member can pass and a holding portion for movably holding said long-length member in said first direction, both formed on said second long-length member holding means; and
said first and second long-length member holding means provided free to be relatively close to and be relatively apart from each other in said first direction.
Then, the long-length workpiece is moved and approached in the second long-length member holding means direction, holding by the first long-length member holding means so as to project the long-length member optional quantity from the second long-length member holding means on the machining head portion side. Then, a three-dimensional linear machining can be smoothly performed on the long-length member by the machining head. Besides, the three-dimensional linear machining can be successively performed on the long-length member by relatively moving the first long-length member holding means in the first direction every machining with the machining head. Then, the three-dimensional linear machining apparatus capable of easily performing mass production machining can be provided.
Besides, in the three-dimensional linear machining apparatus, a second raw material feeding apparatus is provided on the opposite side of said first raw material feeding apparatus of said machining head portion, said second raw material feeding apparatus has a third and a fourth long-length member holding means, said third long-length member holding means is provided on said machining head portion side rather than said fourth long-length member holding means, a through hole through which said long-length member can pass and a holding portion for movably holding said long-length member in said first direction are formed on said third long-length member holding means, a holding portion for fixedly holding said long-length member in said first direction is provided with said fourth long-length member holding means, and said third and fourth long-length member holding means are provided free to be relatively close to and be relatively apart from each other in said first direction.
Then, the long-length member can be machined, holding by the third and the fourth long-length member holding means in the state of placing the machining head therebetween. Therefore, occurrence of bending of the long-length member at the time of machining can be prevented and accurate machining is possible. Besides, by synchronously moving and driving in the first direction interlocking with the first and the second long-length member holding means, various kinds of machining can be performed on the long-length member. Then, high machining efficiency can be exercised.
Besides, in the present invention, said long-length member holding means is rotatably and drivably provided in such a state that said holding portion can be controlled in its rotational angle, and can be rotated and driven in such a state that said long-length member is held by said holding portion.
Then, three-dimensional machining can be easily performed on the long-length member by rotating the holding portion while its rotational angle being controlled.
Besides, in the present invention, said holding portion is provided so as to rotate and drive, synchronizing with said holding portion of another long-length member holding means.
Then, the machining with rotational angle control can be correctly and easily performed on the long-length member by rotating and driving the holding portion, synchronizing with the holding portion of another long-length member holding means.
Besides, in the present invention, a member centering means is provided with said holding portion.
Then, automatic centering is possible by holding the long-length member with the member centering means.
Then, in the present invention, said first long-length member holding means is provided being free to move, drive and position in said first direction and said second long-length member holding means is fixed with respect to said machining head.
Then, since the second long-length member holding means can b
Miyakawa Naoomi
Yamazaki Tsunehiko
Elve M. Alexandra
Gilly Richard P.
Pittman Zidia
Wolf Block Schorr and Solis-Cohen LLP
Yamazaki Mazak Kabushiki Kaisha
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