The invention relates to an explosion-proof housing and to a method for connecting a housing part and a cover part, wherein the housing is formed at least from a metal housing part with at least one housing opening and/or receiving surface and a support edge which borders said housing opening and/or receiving surface and with a cover part which covers the housing opening or receiving surface and comprises a peripheral cover edge. The cover part and the housing part are connected together in an explosion-proof manner. In order to improve such a housing such that a corresponding connection of the housing part and cover part can be produced in a simple and secure manner without the use of adhesive in order to form an explosion-proof housing and such that the housing part and the cover part have a high degree of connection stability, a plurality of connection points between the support edge and the cover edge is formed as interlocking depressions and protrusions, the protrusions being formed by partial melting the cover edge.

A bonded structure is made of a first member and a second member which are bonded to each other. At least one bore having an opening is formed in a surface of the first member, and the second member is filled in the bore of the first member. The bore is defined by a diameter-increasing portion whose opening size increases in a depth direction from a surface side toward a bottom of the first member, and a first diameter-decreasing portion whose opening size decreases in the depth direction from the surface side toward the bottom. The diameter-increasing portion is formed on the surface side, and the first diameter-decreasing portion is formed on a bottom side.

A method for manufacturing a joining connection between a luminously efficacious part and a metal component of a lighting device of a vehicle. A microstructure is generated in a joining surface of the metal component, the microstructure having undercuts with respect to the joining surface. The plastic material of the plastic part is softened in an area of the complementary joining surface near the surface with the aid of an introduction of heat. The plastic part and the metal component are pressed together with a pressure force in such a way that a portion of the softened plastic material penetrates the undercuts of the microstructure. The plastic material of the plastic part is cooled thereby forming a new strength of the softened plastic material of the plastic part.

A method for manufacturing a joining connection between a structural part and a metal component of a lighting device of a vehicle, the method comprising at least the following steps: Generating a microstructure in a joining surface of the metal component, the microstructure having undercuts with respect to the joining surface; Softening the plastic material of the plastic part in an area of the complementary joining surface near the surface with the aid of an introduction of heat; Pressing the plastic part and the metal component together with a pressure force in such a way that a portion of the softened plastic material penetrates the undercuts of the microstructure; and Cooling the plastic material of the plastic part, forming a new strength of the softened plastic material of the plastic part.

A joint structure according to an embodiment of the present invention is provided with: a first member that is made of a metal material and has a plurality of holes having an opening diameter of 30-100 μm formed in a surface thereof; a third member that is made of a metal material the same as or different from that of the first member, or a thermoplastic resin, and that has a plurality of independent holes having an opening diameter of 30-100 μm formed in a surface thereof; and a second member that is made of a curable resin and joins the surface of the first member in which the holes are formed and the surface of the third member in which the holes are formed.

A method of bonding a second object to a first object includes: providing the first object, which includes a thermoplastic liquefiable material in a solid state; providing the second object, which includes a surface portion that has a coupling structure with an undercut such that the second object can make a positive-fit connection with the first object; and pressing the second object against the first object with a tool that is in physical contact with a coupling-in structure of the second object while mechanical vibrations are coupled into the tool. The step of pressing and coupling vibrations into the tool continues until a flow portion of the thermoplastic material of the first object is liquefied and flows into the coupling structures of the second object. Thereafter, the thermoplastic material of the first object is permitted to re-solidify to yield a positive-fit connection between the first and second objects.

A device for joining material by anchoring an insert comprising a first material in a structure comprising a second material is provided. The first material is solid and comprises thermoplastic properties and the second material is solid and is penetrable by the first material when in a liquefied state. The device comprises a vibration device being configured to transmit vibrations to said insert to cause at least partial liquefaction thereof and being arranged to move, relative to said structure, along an insertion direction (ID) to insert said insert at least partly into said structure, a contact sensor being connected to the vibration device and being adapted to move together with the vibration device along the insertion direction (ID), the contact sensor having a sensor body being adapted to detect contact with said structure. A controller is further connected to the contact sensor and adapted for receiving a contact signal from the contact sensor indicating that the sensor body has come into contact with said structure.

A method for producing an alveolar soundproofing structure in which a portion of a membrane of a diaphragm including an acoustic outlet is inserted into a hole of a perforated membrane which covers a cell of the alveolar structure, and the diaphragm is pressed into the cell with the perforated membrane becoming deformed and is fixed at that location. It also relates to the alveolar structure. Such a method enables different types of diaphragms to be inserted into different configurations of cells and enables the diaphragm to be fixed therein, in accordance with the sound frequencies to be processed.

A welding structure includes a first object and a second object connected to each other. The first object includes a first surface, a second surface, a first bonding surface, a welding portion and a second bonding surface. The first bonding surface is connected to one side of the second surface away from the first surface. The welding portion is disposed on a surface perpendicular and connected to the first bonding surface. One side of the second bonding surface is connected to the welding portion. The second object includes a third surface, a fourth surface, a third bonding surface and a fourth bonding surface. The third bonding surface is corresponding to the first bonding surface and connected to one side of the fourth surface away from the third surface. The fourth bonding surface is corresponding to the welding portion and the second bonding surface.

A framed stencil for surface mount technology (SMT) is provided. The frame assembly includes a frame member and a binding insert. The frame member includes an inner perimeter portion and an outer perimeter portion that cooperates with the inner perimeter portion to define an elongated channel. The outer perimeter portion includes a first cantilever portion that extends over the elongated channel and towards the inner perimeter portion. The binding insert is configured for releasable insertion into the elongated channel. The binding insert includes a base and a tongue. The base configured to interface with a mesh substrate to facilitate coupling therebetween. The tongue is coupled to the base and extends substantially horizontally from the base. When the binding insert is inserted into the elongated channel, the tongue extending beneath the first cantilever portion to facilitate retention of the binding insert to the frame member. Methods are also provided.