# US 8,770,461 B2 · Pipe welding apparatus

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- Number: US 8,770,461 B2
- Document ID: US8770461B2
- Status: Granted
- Kind: B2
- Application number: 13/981,988
- Filed: 2012-06-15
- Published: 2013-11-21
- Granted: 2014-07-08
- Earliest claimed: 2012-01-18
- Assignees: Hyundai Heavy Industries Co., Ltd.
- Applicants: Jong Jun Kim; Hyeong Soon Moon; Jong Cheol Kim; Yong Baek Kim
- Inventors: Jong Jun Kim; Hyeong Soon Moon; Jong Cheol Kim; Yong Baek Kim
- Web page: https://patentgrep.com/patent/US8770461B2

## CPC

- B23K 37/0276: {for working on or in tubes (B23K37/0211 takes precedence)}
- B23K 9/0286: {with an electrode moving around the fixed tube during the welding operation}
- B23K 37/00: Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K 37/0217: {the guide member being fixed to the workpiece}
- B23K 37/0282: {Carriages forming part of a welding unit}
- B23K 2101/10: Pipe-lines
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM

## Abstract

Provided is a pipe welding apparatus, including: a support fixed to the ground; a torch which is supported by the support and is formed to correspond to a welding portion of a pipe; and a first rotation part for rotating the torch in a circumferential direction of the pipe up to a predetermined angle.

## Claims

### Claim 1

A pipe welding apparatus, comprising:
a support fixed to the ground;
a torch which is supported by the support and is formed to correspond to a welding portion of a pipe;
a first rotation part for rotating the torch in a circumferential direction of the pipe up to a predetermined angle; and
a second rotation part for rotating the torch in an axial direction of the pipe up to a predetermined angle,
wherein the first rotation part comprises an outer bracket which performs a horizontal reciprocating motion along a guide provided at the support and an inner bracket which is hinge-connected to the outer bracket around a rotating axis, and
wherein the second rotation part comprises: a fixing member attached to the support; a second rotation part connecting member for connecting the torch and the fixing member; a screw fixation member connected to the fixing member; a central member which becomes a center of rotation; and a second rotation part bolt which is formed to passing through the fixing member and the screw fixation member and provides a welding force so that the fixing member rotates around the central member.

### Claim 2 (depends on 1)

The pipe welding apparatus of claim 1, wherein the outer bracket is detachably formed at the support.

### Claim 3 (depends on 1)

The pipe welding apparatus of claim 1, wherein the second rotation part further comprises an elastic member formed on an outer circumference surface of the second rotation part bolt.

### Claim 4 (depends on 1)

The pipe welding apparatus of claim 1, further comprising a third rotation part for horizontally rotating the torch on the pipe up to a predetermined angle.

### Claim 5 (depends on 4)

The pipe welding apparatus of claim 4, wherein the third rotation part comprises: a third rotation part connecting member formed to be connected to the torch; and a third rotation part bolt which is formed to pass through the support and rotates the torch by providing a welding force to the third rotation part connecting member.

### Claim 6 (depends on 1)

The pipe welding apparatus of claim 1, further comprising a sensor which is formed at the support and enables the torch to be disposed at an initial welding position of the pipe.

### Claim 7 (depends on 1)

The pipe welding apparatus of claim 1, wherein the sensor comprises: a torch supporting part which supports the torch and moves up and down on the support; a contact part which is formed at the torch supporting part to be linked with it and comes into contact with an outer surface of the pipe; and a limit switch which is formed at the torch supporting part and enables a vertical movement of the torch supporting part to be stopped when the torch is disposed at the initial welding position of the pipe.