Apparatus and method for welding joint fixtures to a pipe
First Claim
1. An apparatus for welding joint fixtures to the ends of a narrow pipe, said apparatus comprising:
- a table horizontally elongated along the length of the pipe and which supports the pipe at both ends thereof, said table having a driver side at one end of the pipe and a follower side at the opposite end of the pipe;
retaining mechanisms for joint fixtures disposed at the opposite sides of said table, one retaining mechanism being on the driver side of the table and the other on the follower side of the table, each retaining mechanism having a rotary shaft that is coaxially aligned with the pipe and that has an end opposing the end of the other rotary shaft and on which are mounted clamp means for holding a joint fixture, said retaining mechanism for a joint fixture on the driver side being fixed on the table and having a means for turning the joint fixture for a predetermined angle so that the joint fixture will be arranged at a given angle of attachment to the pipe, and said retaining mechanism for the joint fixture on the follower side of the table being movable in the longitudinal direction of the table;
a pair of grip means disposed adjacent the clamp means of the retaining mechanism on both the driver and the follower side to hold the joint fixtures and the pipe suspended therebetween securely in place in a concentric manner;
a pair of welding torches disposed both on the driver side and follower side of said table in a vertical arrangement and normal to said grip means, each pair of welding torches being operative to weld a joint fixture to one end of the pipe; and
means for rotating one of the retainer mechanisms to rotate the fixtures and pipe during welding.
1 Assignment
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Accused Products
Abstract
An apparatus and a method for welding joint fixtures to either end of a pipe at a given angles of attachment. A retaining mechanism on both the driver side and the follower side for joint fixtures is provided on either end of a horizontally elongated table on which a pipe is to be horizontally placed. The joint fixtures are secured on the opposing inner ends of the retaining mechanisms via clamping devices to receive the pipe therebetween. The retaining mechanism for the joint fixture on the driver side includes a device for establishing the angle of attachment of the joint fixture so that the joint fixture can be turned to a predetermined angular position. After the angle of attachment of the joint fixture to the pipe is determined, the junctions between the joint fixtures and the pipe on either end are held in place by gripping devices for tentative welding using welding torches. When the tentative welding is completed, the gripping devices are released and the entire circumference of respective junctions is welded by the welding torches.
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Citations
7 Claims
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1. An apparatus for welding joint fixtures to the ends of a narrow pipe, said apparatus comprising:
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a table horizontally elongated along the length of the pipe and which supports the pipe at both ends thereof, said table having a driver side at one end of the pipe and a follower side at the opposite end of the pipe; retaining mechanisms for joint fixtures disposed at the opposite sides of said table, one retaining mechanism being on the driver side of the table and the other on the follower side of the table, each retaining mechanism having a rotary shaft that is coaxially aligned with the pipe and that has an end opposing the end of the other rotary shaft and on which are mounted clamp means for holding a joint fixture, said retaining mechanism for a joint fixture on the driver side being fixed on the table and having a means for turning the joint fixture for a predetermined angle so that the joint fixture will be arranged at a given angle of attachment to the pipe, and said retaining mechanism for the joint fixture on the follower side of the table being movable in the longitudinal direction of the table; a pair of grip means disposed adjacent the clamp means of the retaining mechanism on both the driver and the follower side to hold the joint fixtures and the pipe suspended therebetween securely in place in a concentric manner; a pair of welding torches disposed both on the driver side and follower side of said table in a vertical arrangement and normal to said grip means, each pair of welding torches being operative to weld a joint fixture to one end of the pipe; and means for rotating one of the retainer mechanisms to rotate the fixtures and pipe during welding. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification