Manufacturing method of welded member
AssigneeFutaba Industrial Co., Ltd.
InventorsKeigo Yasuda, Shota Muto
Life of this patent
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Abstract
Disclosed is a method for manufacturing a welded member in which a workpiece made of a high tensile material and a welding object are welded. The method includes welding the workpiece and the welding object such that welded portions are formed between the workpiece and the welding object by performing projection welding. The method also includes applying a cancellation stress to the welded member after the projection welding, so that a stress that is generated in the welded portions after the projection welding and acts in a direction to pull the welded portions close to each other is canceled.
Claims8
A method for manufacturing a welded member in which a workpiece made of a high tensile material and a nut are welded, the workpiece having a plate-shape and including a first surface and a second surface that are opposite to each other in a thickness direction of the workpiece, the method comprising:
- welding the workpiece and the nut such that welded portions are formed between the first surface of the workpiece and the nut by performing projection welding;
- and
- applying a cancellation stress to the welded member after the projection welding, so that a stress that is generated in the welded portions after the projection welding and acts in a direction to pull the welded portions close to each other is canceled,
- wherein the cancellation stress is generated by applying a load to a load target which is a target portion of the welded member to which the load is applied,
- wherein the load target is the nut, and
- wherein the cancellation stress is generated by using pin or a bolt fitted in a screw hole of the nut to apply the load to a peripheral portion of the screw hole of the nut in a direction in which the nut moves away from the workpiece.
A method for manufacturing a welded member in which a workpiece made of a high tensile material and a nut are welded, the workpiece having a plate-shape and including a first surface and a second surface that are opposite to each other in a thickness direction of the workpiece, the method comprising:
- welding the workpiece and the nut such that welded portions are formed between the first surface of the workpiece and the nut by performing projection welding;
- and
- applying a cancellation stress to the welded member after the projection welding, so that a welding stress that is generated in the welded portions after the projection welding and acts in a direction to pull the welded portions close to each other is canceled,
- wherein the cancellation stress is generated by applying a load to a load target which is a target portion of the welded member to which the load is applied,
- wherein the load target is the workpiece, and
- wherein the cancellation stress is generated by compressing an area of the workpiece surrounding the nut in a thickness direction of the workpiece by:
- pressing the area of the workpiece between a receiving stand and a pushing stand;
- or
- shot peening the first surface of the workpiece in the area, so as to create a force in the workpiece that is opposite to the direction of the welding stress.
Dependencies are inferred from the claim text.