Spatter analysis method and device

Patent metadata

Field	Value
Publication number	US-10850343-B2
Application number	US-201615555708-A
Country	US
Kind code	B2
Filing date	Mar 4, 2016
Priority date	Mar 6, 2015
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A spatter production information storage unit stores spots where spatter has been produced. For the spots where spatter has been produced, a comparison information generation unit acquires weld design information stored in a design information storage unit and weld instruction information stored in an instruction information storage unit, compares both pieces of information, and generates comparison information. An image information output unit outputs the generated comparison information to a display device. The display device displays the comparison information on a screen so as to allow checking by an operator. Hence, it is possible to check, on the screen, comparison information for weld instruction information and weld design information highly likely as a cause for spatter being produced, and to efficiently perform the task of analyzing the causes for spatter being produced.

First claim

The invention claimed is:

1. A computer-implemented spatter analysis method for analyzing spattering caused in spot welding of a workpiece with a welding gun, said spatter analysis method including:
a design information storing step of storing welding design information defined by design information on the workpiece as welding information on the welding gun at a time of welding, wherein said welding design information is stored as data in nonvolatile computer memory;
a teaching information storing step of storing welding teaching information defined by teaching information on a welding robot as welding information on the welding gun at the time of welding, wherein said welding teaching information is stored as data in nonvolatile computer memory;
a step of operating a welding robot with a control unit to perform spot welding on a workpiece based on the stored welding teaching information;
a spatter information storing step of storing information relating to a welding spot at which spattering is caused during operation by the welding robot based on the welding teaching information;
a difference information generating step of generating difference information derived from a comparison of the welding design information and the welding teaching information at the spot where the spattering is caused, wherein the difference information is generated by an analysis processing unit on a computer; and
a screen display step of displaying the difference information on a screen.

2. The spatter analysis method according to claim 1 , wherein the welding design information and the welding teaching information include attitude information at the time of welding the welding spots with the welding gun, and
wherein the difference between the welding design information and the welding teaching information is a difference between the attitude information included in the welding design information and the attitude information included in the welding teaching information.

3. The spatter analysis method according to claim 2 , wherein the welding teaching information includes at least one piece of information of a welding pressure, a current value, and an energization time at the welding spot, and
the spatter analysis method further includes a welding condition display step of displaying the at least one piece of information of the welding pressure, the current value, and the energization time, on the screen.

4. A spatter analysis device for analyzing spattering caused in spot welding of a workpiece with a welding gun, said splatter analysis device including:
a design information storage unit configured to store welding design information defined by design information on the workpiece as welding information on the welding gun at a time of welding, wherein said welding design information is stored as data in nonvolatile computer memory;
a teaching information storage unit configured to store welding teaching information defined by teaching information on a welding robot as welding information on the welding gun at the time of welding, wherein said welding teaching information is stored as data in nonvolatile computer memory;
a control unit operable to control operation of a welding robot in spot welding a workpiece based on the stored welding teaching information;
a spatter information storage unit configured to store information relating to a welding spot at which spattering is caused during operation by the welding robot based on the welding teaching information;
a difference information generating unit configured to generate difference information derived from a comparison between the welding design information and the welding teaching information at the spot where the spattering is caused; and
a screen display unit configured to display the difference information on a screen.

5. The spatter analysis device according to claim 4 , wherein the welding design information and the welding teaching information include attitude information at the time of welding the welding spots with the welding gun, and
wherein the difference between the welding design information and the welding teaching information is a difference between the attitude information included in the welding design information and the attitude information included in the welding teaching information.

6. The spatter analysis device according to claim 5 , wherein the welding teaching information includes at least one piece of information of a welding pressure, a current value, and an energization time at the welding spot, and
the screen display unit is configured to display the at least one piece of information of the welding pressure, the current value, and the energization time on the screen.

Assignees

• Honda Motor Co Ltd

Inventors

• Yoshino Tetsuya
• Tanabe Junya

Classifications

• B23K11/11 Primary

  Spot welding · CPC title

• B23K11/24

  Electric supply or control circuits therefor · CPC title

• B23K31/125

  Weld quality monitoring · CPC title

• B23K11/16

  taking account of the properties of the material to be welded · CPC title

• B23K2101/18

  Sheet panels · CPC title