A welding structure includes: a first metal member and a second metal member that are superimposed and welded together. The first metal member has a hole. The second metal member includes a nugget portion where a part of the second metal member has been melted by heat of laser light and has re-solidified. A peripheral portion of the hole in the first metal member covers the nugget portion. A part of the nugget portion is exposed through the hole.

A welding structure includes: a first metal member and a second metal member that are superimposed and welded together. The first metal member has a hole. The second metal member includes a nugget portion where a part of the second metal member has been melted by heat of laser light and has re-solidified. A peripheral portion of the hole in the first metal member covers the nugget portion. A part of the nugget portion is exposed through the hole.

An outer joint member of a constant velocity universal joint includes a cup section having track grooves formed in an inner periphery thereof, which are engageable with torque transmitting elements, and a shaft section formed at a bottom portion of the cup section. The cup section and the shaft section are formed as separate members, and by bringing a cup member forming the cup section and a shaft member forming the shaft section into abutment against each other at respective joining end surfaces and welding them, a hollow cavity portion is formed. The cup member has, at an axial center, a ventilation hole that communicates with the hollow cavity portion and any one of the joining end surfaces of the cup member and the joining end surface of the shaft member has a welding spatter receiving groove formed on a radially inner side thereof.

An outer joint member of a constant velocity universal joint includes a cup section having track grooves formed in an inner periphery thereof, which are engageable with torque transmitting elements, and a shaft section formed at a bottom portion of the cup section. The cup section and the shaft section are formed as separate members, and by bringing a cup member forming the cup section and a shaft member forming the shaft section into abutment against each other at respective joining end surfaces and welding them, a hollow cavity portion is formed. The cup member has, at an axial center, a ventilation hole that communicates with the hollow cavity portion and any one of the joining end surfaces of the cup member and the joining end surface of the shaft member has a welding spatter receiving groove formed on a radially inner side thereof.

An application of the laser welding process in the joining of shaped and machined components for the production of a front suspension lower swing arm of automotive vehicles. This arm is composed of two shaped parts (4, 5), a tube with a larger circular section (9) for implantation of a cylindrical rubber bushing (2) coupled to a flanged region (6), a cylindrical pin (8) fixed to a cylindrical tube with a smaller circular section (7) to ensure connection of the pin with the shaped parts (4, 5), a bushing with fixing flanges (1), and one socket joint (3). Alternatively, a rubber bushing fixed in the vertical form (15), fixed by pressure in the housing in the already laser welded plates (4, 5) may be used instead of the cylindrical pin (8) fixed in a tube with smaller circular section (7) and a bushing with fixing flanges (1).

The invention relates to an electrical connection arrangement for producing a detachable electrical connection with one or more plug connectors, wherein the connection arrangement comprises the following: a. a housing which forms at least one housing wall in which there are one or more preferably cylindrical openings; b. one or more plug connectors, each of which has a cylindrical plug connector housing protruding through an opening; c. wherein a contact carrier carrying a contact is arranged in each of the cylindrical plug connector housing(s), the contact connections of which are on a common mounting plane for electrically contacting a circuit board, d. wherein the housing wall of the housing is integrally bonded to the cylindrical plug connector housing(s) via their outer casing.

The invention relates to an electrical connection arrangement for producing a detachable electrical connection with one or more plug connectors, wherein the connection arrangement comprises the following: a. a housing which forms at least one housing wall in which there are one or more preferably cylindrical openings; b. one or more plug connectors, each of which has a cylindrical plug connector housing protruding through an opening; c. wherein a contact carrier carrying a contact is arranged in each of the cylindrical plug connector housing(s), the contact connections of which are on a common mounting plane for electrically contacting a circuit board, d. wherein the housing wall of the housing is integrally bonded to the cylindrical plug connector housing(s) via their outer casing.

The present invention relates to a method for connecting tubes (221) of a shell and tube heat exchanger (200) to a tube bottom (230) of the shell and tube heat exchanger (200), wherein the tubes (221) and the tube bottom (230) are each made of aluminum or an aluminum alloy, and wherein the tubes (221) are connected to the tube bottom (230) by means of laser welding in a bonded manner.

The present invention relates to a method for connecting tubes (221) of a shell and tube heat exchanger (200) to a tube bottom (230) of the shell and tube heat exchanger (200), wherein the tubes (221) and the tube bottom (230) are each made of aluminum or an aluminum alloy, and wherein the tubes (221) are connected to the tube bottom (230) by means of laser welding in a bonded manner.

A laser welding method of a die cast member includes forming a first melted portion by irradiating a first laser beam on a planned welding portion including a contact surface between a first member and a second member, and welding the first member and the second member by forming a second melted portion by irradiating a second laser beam on the planned welding portion after the first melted portion is formed; the first member includes a metal; and the second member is formed by die casting. A width of the first melted portion is not more than half of a width of the second melted portion. A depth of the first melted portion is deeper than a depth of the second melted portion.