90results about How to "Ensure joint strength" patented technology

In a vehicle-body structure of a vehicle which comprises a frame comprised of vehicle-body forming members forming a closed-section portion, a reinforcing member provided in the closed-section portion and joined to the frame, and another vehicle-body forming member joined to an outer face of the frame, which is different from the vehicle-body forming members of the frame, a joint portion of the frame and the reinforcing member includes a rigid joint portion where the frame and the reinforcing member are joined with a direct contact thereof and a flexible joint portion where the frame and the reinforcing member are joined via a damping member provided therebetween, and the joint portion is provided at a specified position on an inner face of the frame located in the vicinity of a portion where the forming member is joined to the frame.

In a frame having a closed-section portion which is formed by joining a first member having a U-shaped section and a second member having a flat-plate shape, a bulkhead is provided in the closed-section portion as a reinforcing member, flanges of the bulkhead and the first and second members are joined with a rigid joint portion where they are joined by a spot welding and a flexible joint portion where they are joined via a damping member. Thereby, transmission of vibrations can be properly restrained, improving the rigidity of the portion having the closed-section portion.

In a vehicle-body structure of a vehicle which comprises vehicle-body forming members forming a closed-section portion and having a dent portion which dents toward an inside of the closed-section portion, and a reinforcing member provided in the closed-section portion and joined to the vehicle-body forming members, a joint portion of the vehicle-body forming members and the reinforcing member includes a rigid joint portion where the vehicle-body forming members and the reinforcing member are joined with a direct contact thereof and a flexible joint portion where the vehicle-body forming members and the reinforcing member are joined via a damping member provided therebetween, and this joint portion is provided at or in the vicinity of the dent portion.

An electrically operated valve comprises a sealed housing in which the bottom is fixed on a valve body provided with a valve chamber and a throttling hole; a step motor installed inside the sealed housing comprises a stator coil and an rotor in opposite configuration; a valve needle approaches to or leaves away from the throttling hole according to the driving of the step motor; the inner part of the sealed housing is provided with a stop mechanism for stopping the rotation of the rotor; the stopping mechanism limits the up and down movement of the valve needle so as to control the flow rate of the fluid passing in and out of the valve chamber; the sealed housing comprises a cylindrical wall part, a bent part, an arc part, and a cover-shaped shield component; the cover-shaped shield component comprises a short cylindrical wall part formed on the inner periphery surface of the head part connected through spot welding on the arc part; the cover-shaped shield component comprises a bent part and a top part which are integrally formed; the short cylindrical wall part, the bent part and the top part are respectively formed into the external periphery shapes of the short cylindrical wall part, the bent part, and the top part along the sealed housing; and simultaneously, the cover-shaped shield component is provided with the stop mechanism.

There is provided a method of hermetically sealing electronic parts, comprising the step of bonding a base having semiconductor devices mounted thereon and a cap together via a solder. The solder is composed, by weight, of 78% or more but less than 79.5% Au, and the balance Sn. It is particularly preferred that the bonding is performed with the use of a solder composition composed, by weight, of 78% or more but 79% or less Au, and the balance Sn as the solder and furthermore through plating the cap with gold.

Provided are a vehicle body front portion structure that enables an increase in vehicle body rigidity and strength while suppressing an increase in weight and a decrease in layout freedom, and a vehicle body assembly method. A vehicle body front portion structure (1) is provided with: a first weld portion (11) where a shield lower flange (4a) of a windshield lower member (4) is abutted on a closed cross section of a front pillar (2), and where the shield lower flange (4a), an inner front flange (21a), and a rear end portion (5a) are spot-welded; and a second weld portion (12) where a general portion (5b) of a side member (5), a stiffener front flange (22a), and an outer front flange (3a) are spot-welded at a position forwardly of the first weld portion (11).

A method and a device for friction sir welding capable of achieving sufficient welding strength of a product. [MEANS FOR SOLVING PROBLEMS] Thermal expansion of each tool (2, 3) is prevented because each tool (2, 3) is cooled by air jetted from each air nozzle (4, 5), and this appropriately maintains a gap between an upper tool (2) and a lower tool (3). As a result, a friction stir-welded portion having a residual base plate thickness with an appropriate thickness between an outer panel (6a) and an inner panel (6b) is formed, achieving sufficient welding strength of an engine hood. Air cooled by an extreme low temperature air producer (16) is jetted from each air nozzle (4, 5) to cool each tool (2, 3), and each tool (2, 3) is effectively cooled. The structure above enables thermal expansion of each tool (2, 3) to be constrained to a minimum level to produce a friction stir-welded portion with a residual base plate thickness having a more stable thickness, and as a result, welding strength of the engine hood is sufficiently achieved.

With this copper wire joining method, a rubbed portion on which a coating remains between an electrode and a core wire is formed on the electrode. Then, after a capillary is moved away from the rubbed portion, and a ball is formed by melting a copper wire at a tip end of the capillary. Next, the ball is joined to the rubbed portion by pressing the ball against the rubbed portion.

The present invention relates to a cylinder device and the making method, which will not lead to substantial increase of the manufacturing cost or the reduction of the jointing strength and can increase the tolerance of the cover body to the vibration. In the hydraulic bumper of the connecting rod (2) which is formed by butt-jointing the connecting rod main body (10) extending from the cylinder body (1) and the installing component (12) with a front end becoming the bolt shape part (11), and the connecting rod extends telescopically from the cylinder (1), a flaunching part (13) forms integratedly at the end side of the installing component (12) butt-jointing to the connecting rod main body (10), a flat part (16) which is used to install the cover body (14) of the protecting cover (4) is superposed on the flaunching part (13), the flaunching part and the flat part is jointed by projection welding. The torque moment which functions on the casing (14) in the swing rotating direction is borne by the wide flat surface of the cover body (14), therefore, the stress produced on the casing (14) is dispersed with a wide range, and the result is that fatigue cracking is hard to generate on the cover body even if at the condition that the RV vehicle, etc. function a furious vibration on the cover body (14).