Welding device

Patent metadata

Field	Value
Publication number	US-10843285-B2
Application number	US-201716319838-A
Country	US
Kind code	B2
Filing date	Jul 18, 2017
Priority date	Jul 27, 2016
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

A welding device for welding a workpiece using a welding robot includes a welding control device that controls operation of the welding robot and a preheating device that preheats the workpiece. The welding control device includes an input unit through which at least one or both of dimensions of the workpiece and a shape of a welding joint, and preheating information are inputted, and a storage unit that includes at least welding robot operation orbit teaching data, welding condition data, and preheating condition data. The welding control device automatically provides a preheating condition, a welding robot operation orbit, and a welding condition for the welding joint to be welded, and preheating and welding are performed.

First claim

The invention claimed is:

1. A welding device for welding a workpiece using a welding robot, comprising:
a welding control device that controls operation of the welding robot;
a preheating device that preheats the workpiece, the preheating device includes a preheating torch;
a pair of rotary positioners that are provided movably in a longitudinal direction of the workpiece and hold and rotate the workpiece;
a carriage, provided movably in a parallel direction to the direction in which the pair of rotary positioners move;
the welding robot, provided on the carriage movably in a perpendicular direction to the direction in which the rotary positioners move; and
a welding torch, provided at an end of the welding robot,
wherein the welding control device is configured to receive an input of at least one or both of dimensions of the workpiece and a shape of a welding joint, and preheating information,
wherein the welding control device including a storage unit that includes at least welding robot operation orbit teaching data, welding condition data, and preheating condition data,
wherein the welding control device automatically provides a preheating condition, a welding robot operation orbit, and a welding condition for the welding joint to be welded based on one or both of the dimensions of the workpiece and the shape of the welding joint, and the preheating information, and based on the welding robot operation orbit teaching data, the welding condition data and the preheating condition data prepared in advance in the storage unit, and preheating and welding are performed
wherein the pair of rotary positioners include:
a pair of annular holding members that receive the workpiece internally and hold the workpiece with a plurality of fixing jigs; and
a driving member configured to rotate one or both of the pair of annular holding members, and

wherein each of the annular holding members is divided at a predetermined position of an annular portion to form a part of the annular portion to be open, so that the workpiece can be received in the annular holding members.

2. The welding device according to claim 1 ,
wherein
the preheating torch is at least provided on a preheating torch carriage that can move in a longitudinal direction of the workpiece, provided exclusively at an end of the welding robot, or provided at an end of the welding robot replaceably by the preheating torch.

3. The welding device according to claim 1 ,
wherein the preheating condition includes a preheating temperature, and
the preheating temperature is measured by a temperature sensor, and controlled by the preheating device to reach a set preheating temperature determined in advance through input by a worker.

4. The welding device according to claim 1 ,
wherein the carriage is one of a plurality of carriages, provided movably in a parallel direction to the direction in which the pair of rotary positioners move,
wherein the welding robots, provided on the plurality of carriages respectively, are movable in a perpendicular direction to the direction in which the rotary positioners move, and
wherein one of the welding torch is provided at an end of each of the welding robots.

5. The welding device according to claim 1 ,
wherein the welding control device is configured to detect a position of the workpiece by applying a sensing voltage between the welding torch supporting a welding wire set to have a predetermined extension and the workpiece, and detecting a current conduction state caused by contact between the welding wire and the workpiece, and
wherein the welding control device is configured to determine a root gap based on data of detected positions of both groove faces in a groove width direction from a detection start position of a predetermined depth relative to a set groove depth from at least one surface of the workpiece, the data of detected positions of the both groove faces being detected by the welding control device, a difference between the set groove depth and the detection start position, and preset angles of both of the groove faces.

6. The welding device according to claim 5 ,
wherein the welding control device automatically provides a lamination pattern, preheating conditions, heat input conditions, inter-pass temperature conditions and welding conditions for the welding joint to be welded, based on a lamination pattern, preheating conditions, heat input conditions and welding conditions prepared in advance for dimensions of the workpiece or for the dimensions and root gap of the workpiece, and a root gap determined through input or sensing.

7. A welding device for welding a workpiece using a welding robot, comprising:
a welding control device that controls operation of the welding robot; and
a preheating device that preheats the workpiece, the preheating device includes a preheating torch
wherein the welding control device is configured to receive an input of at least one or both of dimensions of the workpiece and a shape of a welding joint, and preheating information,
wherein the welding control device including a storage unit that includes at least welding robot operation orbit teaching data, welding condition data, and preheating condition data,
wherein the welding control device automatically provides a preheating condition, a welding robot operation orbit, and a welding condition for the welding joint to be welded based on one or both of the dimensions of the workpiece and the shape of the welding joint, and the preheating information, and based on the welding robot operation orbit teaching data, the welding condition data and the preheating condition data prepared in advance in the storage unit, and preheating and welding are performed,
wherein the welding control device edits preheating timings as the preheating conditions for welding the plurality of welding joints, and
the welding control device selects one of a method in which preheating and welding are performed alternately for each of the plurality of welding joints, and a method in which all the welding joints are welded after all the plurality of welding joints are preheated.

8. A welding device for welding a workpiece using a welding robot, comprising:
a welding control device that controls operation of the welding robot;
a preheating device that preheats the workpiece, the preheating device includes a preheating torch;
a pair of rotary positioners that are provided movably in a longitudinal direction of the workpiece and hold and rotate the workpiece;
a carriage, provided movably in a parallel direction to the direction in which the pair of rotary positioners move;
the welding robot, provided on the carriage movably in a perpendicular direction to the direction in which the rotary positioners move; and
a welding torch, provided at an end of the welding robot,
wherein the welding control device is configured to receive an input of at least one or both of dimensions of the workpiece and a shape of a welding joint, and preheating information,
wherein the welding control device including a storage unit that includes at least welding condition data and preheating condition data,
wherein the welding control device automatically provides a preheating condition, a welding robot operation orbit, and a welding condition for the welding joint to be welded based on one or both of the dimensions of the workpiece and the shape of the welding joint, and the preheating information, and based on the welding condition data and the preheating condition data prepared in advance in the storage unit, and preheating and welding are performed,
wherein the pair of rotary positioners include:
a pair of annular holding members that receive the workpiece internally and hold the workpiece

Assignees

• Kobe Steel Ltd

Inventors

• Kishikawa hirohisa
• Izutani Shun
• Takada Shigeto
• Matsumura Hiroshi

Classifications

• B23K9/00

  Arc welding or cutting · CPC title

• B23K9/095 Primary

  Monitoring or automatic control of welding parameters · CPC title

• B25J13/08

  by means of sensing devices, e.g. viewing or touching devices · CPC title

• B23K37/047 Primary

  moving work to adjust its position between soldering, welding or cutting steps (B23K37/053 takes precedence) · CPC title

• B23K9/235

  Preliminary treatment · CPC title