485results about How to "Increase the welding area" patented technology

A pillar-to-pillar flip-chip assembly primarily comprises a substrate, a chip disposed on the substrate, a plurality of first copper pillars on the bonding pads of the chip, a plurality of second copper pillars on the bump pads of the substrate, and a soldering material. A first height of the first copper pillars protruding from the active surface of the chip is the same as a second height of the second copper pillars from the solder mask on the substrate. When the soldering material electrically and mechanically connects the first copper pillars to the second copper pillars, a plurality of central points of the soldering material are formed on an equal-dividing plane between the chip and the substrate to reduce the direct stresses exerted at the soldering material to avoid peeling or breaks from the bump pads. Moreover, each of conventional solder balls is replaced with two soldered copper pillars to meet the lead-free requirements with higher reliability and lower costs.

A friction stirring-welding method capable of increasing the welding strength of a lap joint. A welding tool (1) comprises a small diameter projected part (2) at the tip of a shoulder (3). The welding tool is press-fitted to the upper plate (4) of the lap joint while being rotated. By a friction stirring action, an upper plate side welding boundary surface (6) plastically flows, a surface oxidation film on a lapped surface is peeled off, and the boundary surface is activated to provide an excellent welding part. Also, since the welding tool is formed in a shape having the small diameter semispherical projected part (2) at the tip thereof, the thickness (12) of an upper plate welding part is increased, and a lap joint part with high welding strength can be provided.

The invention discloses a welding method of a tungsten target material component. The welding method comprises the following steps: providing a tungsten target material and a copper back plate; turning threads in the welding surface of the tungsten target material; forming a groove in the copper back plate; mounting the tungsten target material in the groove; welding the tungsten target material and the copper back plate by a hot isostatic pressure method. Through the use of the welding method, the threads are turned in the welding surface of the tungsten target material, the groove is formed in the copper back plate, and the tungsten target material and the copper back plate are mounted together, so that the tungsten target material is positioned in the groove; then welding by the hot isostatic pressure method is performed, in the welding process, the deformation quantity of the tungsten target material is small, and a fragmentation phenomenon not easily occurs; in addition, because of the threads, the area of the welding surface of the tungsten target material is enlarged, and the welding strength of the tungsten target material component is improved; after welding, the threads are embedded in the copper back plate from the welding surface of the tungsten target material, so that the welding strength of the tungsten target material component is further improved.

A metal snow guard is provided with a solid layer of soldering material on its base to be heated and melted with application of heat to the upper side of the snow guard to solder the base to an underlying metal roof. The preferred soldering material comprises an interior layer of solder and an outer layer of flux. In one form, the soldering material is in the form of spaced spots or projections providing a rough surface on the underside of the snow guard with the projections melting and spreading laterally into uneven surfaces where the roof or the base of the snow guard is not flat. The amount of solder and/or flux in the solid layer is limited so that the solder and/or flux does not flow outwardly from the snow guard and run down the metal roof thereby damaging or marring the metal roof surface. The preferred snow guards are formed of sheet metal of relatively few pieces and which are folded and joined together in an inexpensive manner. Preferably, the projections of soldering material are formed by forcing a paste of solder and flux through spaced holes in a plate or screen onto the base and then applying heat to melt the past and form a crust of flux on the outside of the projections which are mainly then comprised of solder. The outer crust layer of flux should protect the inner solder from oxidizing.

While a ferrule or a laser beam is being shifted in an axial direction, the laser beam is applied, thereby forming a plurality of welded portions at the boundary between a coating of an optical fiber and the ferrule. A YAG laser in a Q switch pulse mode is used to provide a laser beam. The beam. The YAG laser in the Q switch pulse mode is preferably oscillated in a pulse exciting system. The ferrule is made of transparent or semi-transparent synthetic resin. The coating of the optical fiber is made of translucent synthetic resin. In this way, an optical fiber fixing method can be provided which can surely fix an optical fiber and a ferrule in a shortened time, and minimize the thermal influence on the vicinity of the portion to be processed.

The invention provides a novel sleeve-type fabricated joint of a square steel tube column and an H-shaped steel girder and a construction method of the novel sleeve-type fabricated joint. The novel sleeve-type fabricated joint comprises a joint area square steel tube column section, a joint area H-shaped steel girder section and a connecting piece. The connecting piece comprises a square sleeve, an H-shaped sleeve and a supporting steel plate, the square sleeve and the square steel tube column are connected through high-strength bolts, the situation that the column wall is too thin, and thus local protrusion occurs to the positions, where the bolts are located, of the square steel tube column is effectively prevented, and thus the bearing force of bolted connecting positions of the columnand the girder is increased; the H-shaped sleeve and the square sleeve are connected in a welded mode, the welding area is increased compared with a conventional mode, and thus the joint is firmer andsafer; the supporting steel plate is connected with the square sleeve, the joint area H-shaped steel girder section and the joint area square steel tube column section simultaneously through high-strength bolts, the bearing force of the girder and column joint is increased, thus stress is more reasonable, and the joint is firmer; and the welding section can be completed in a factory, on-site zero-welding is achieved, and thus the novel sleeve-type fabricated joint is suitable for fabricated connecting of the square steel tube column structure and the H-shaped steel girder structure.

A ball grid array package substrate includes a substrate body having a surface. A least a ball pad and a solder mask are formed on the surface of the substrate body. The solder mask has an opening corresponding to the ball pads to enable the ball pad to have an exposed surface out of the opening of the solder mask. A patterned reinforcing metal layer is formed on the exposed surface of ball pads along a sidewall of the opening of the solder mask so that the sidewall of the opening will not directly contact the solder balls. Solder balls can be reflowed on the ball pads and the patterned reinforcing metal layers to increase jointing area and improve the shear strength of the solder balls.

The invention relates to a pipe joint structure, comprising a collecting pipe for delivering fluid along a first direction, an inlet/outlet pipe for delivering fluid along a second direction which is perpendicular to the first direction and a hollow pipe joint hermetically jointed to the collecting pipe and the inlet/outlet pipe. The first joint part of the pipe joint is jointed to one end part of the inlet/outlet pipe and maintains the fluid communication, the second joint part of the pipe joint is jointed to the collecting pipe and maintains the fluid communication with the collecting pie via a hole on the side wall of the collecting pipe, thereby enabling the fluid communication between the inlet/outlet pipe and the collecting pipe is maintained. The second joint part forms a pipe-like wall or partially pipe-like wall configuration jointed to the collecting pipe. The pipe joint structure has advantages of small pressure drop in the inlet/outlet pipe, high burst strength in the joint part and low cost.

A reliable and superior joining strength in entire joining parts of resin molded bodies including tilting portions is obtained by devising a shape and a size of each protrusion for welding provided in the joining parts of the resin molded bodies. In a structure of joining resin molded bodies according to the present invention, upper and lower half bodies 10 and 20 are joined with each other by means of a vibration welding method while the upper and lower half bodies 10 and 20 are being pressurized in a state in which joining parts thereof are butted into each other in a substantially entire area of the joining parts. The joining parts of the respective half bodies have vertical portions 11 and 13 and vertical portions 21 and 23 respectively vertical to a pressurizing direction and tilting portions 12 and 22 tilting relative to the pressurizing direction, and protrusions for welding 11E to 13E or 21E to 23E are provided in at least the joining part of one of the half bodies. Further, referring to a butting area of the protrusions in a butted state, the butting area in the vertical portions is set to be narrower than the butting area in the tilting portions.

The present invention provides a holder for holding a tooth on a body of a cutting blade or grinding drum for cutting or grinding rock or hard earth formations. The body has an attachment surface for attaching the holder. The holder comprises a portion for holding the tooth in a manner such that a portion of the tooth projects from the holder. The holder also comprises a base surface for attaching the holder to the attachment surface of the body. The holder is positionable in a plurality of different orientations in which the base surface is attachable to the attachment surface and in which the received tooth projects from the body in a predetermined direction. When the holder is positioned in one of the plurality of orientations, the base surface has, within an area over the attachment surface, a shape which is profiled so that a region defined between the base surface and the attachment surface is, for at least one of the plurality of different orientations, smaller than a region that would be defined if the base surface would have a flat shape.

The invention relates to the field of lithium ion batteries, and discloses a lithium ion electrical core and a lug. The lug comprises a metal band and lug glue, wherein the lug glue is bonded in the middle positions of the front surface and the back surface of the metal band; a protrusion part is arranged at one tail end of the metal band along the longitudinal direction; the protrusion part protrudes along the horizontal direction of the metal band; and the width of the protrusion part along the horizontal direction of the metal band is greater than that of the middle part of the metal band. The impedance at the welding part of the lug and a pole piece can be reduced by applying the lug in the lithium ion battery, the heat productivity at the welding part of the lug and the pole piece is reduced, and the bulge phenomenon of the lithium ion battery is avoided.

The invention relates to the technical field of cable laying, and discloses a cable support that can be adjusted in the horizontal and vertical directions and in the axial direction around the support arm, including a column, a support arm, and a hoop. A mounting plate is fixed on the hoop. A connecting plate is fixed, and an adjustment piece fixed on the mounting plate is arranged between the support arm and the mounting plate when the connecting plate rotates on the mounting plate at different angles. When the support arm turns to the point where the inclination direction of the upper surface of the support arm is tangent to the arc track that the cable needs to turn, the support arm is fixed by the adjustment piece, and then the cable is installed on the support arm upper surface by using an Ω-shaped cable clamp; For the upper surface of the horizontal support arm, the upper surface of the support arm whose inclination direction is tangent to the arc trajectory that the cable needs to turn can make the arc that the cable needs to bend smaller, which can reduce the possibility of damage to the cable; and It facilitates the installation of the Ω-shaped cable clamp, and at the same time makes the local stress between the Ω-shaped cable clamp and the cable smaller.

A screen for intake of fluid. The screen includes parallel and spaced rods, filtration material, a fitting, and structural members. The rods may be distributed in a cylindrical configuration. The filtration material, in some embodiments spirally wrapped wire, is disposed around the rods to define an interior volume. The fitting is disposed at an end of the rods and adjacent to the filtration material. Each structural member, which in some embodiments are elongated bars, is interposed between adjacent rods. The structural members are welded to the adjacent rods, and the adjacent rods and the structural members are welded to the fitting to increase the effective weld area, the tensile strength of the connection, and potentially the overall strength of the screen. The screen may be used for a variety of fluids and installations, and is particularly suited to use in water wells.

The invention relates to a polycylinder stackable semiconductor packaging structure. The structure mainly comprises a wafer carrier, a wafer and a plurality of downwards convex block groups, wherein the wafer carrier has a plurality of switchover pads on an upper surface and a plurality of external pads on a lower surface; the wafer is arranged on and is electrically connected with the wafer carrier; the downwards convex block groups are correspondingly arranged on the external pads, and each downwards convex block group connected with each external pad consists of a plurality of conducting cylinders; and a solder filling gap is arranged between adjacent conducting cylinders of the same downwards convex block group. The stackable semiconductor packaging structure is used to increase welding area and perplex the shape of a welding interface, thereby achieving high durability of welding spots and reducing the growing possibility of cracks. In addition, the convex block group arranged on each external pad has the solder filling gap, solder can be filled and stored in the convex block group, so that a plaque does not extrude the solder to cause bridging short circuit even when inclined or warped; therefore, the structure is particularly suitable for practical use.

The invention discloses a bellows assembly of an SF6 valve and a manufacturing method thereof. The bellows assembly comprises a valve rod, a support seat and a bellows, wherein the support seat is fixedly connected with the valve rod, and the valve rod is provided with a circular flange; the bellows is sleeved at the periphery of the valve rod between the circular flange and the support seat; and two ends of the bellows are respectively arranged in annular grooves formed on two oppositely arranged end faces of the circular flange and the support seat, and the bellows and the annular grooves are fixed by means of braze welding. Therefore, by using the bellows assembly of the SF6 valve disclosed by the invention, open welding between the mouth of the bellows and the valve rod as well as the support seat can be effectively avoided, thereby greatly improving the air tightness and service life of the bellows assembly.

The invention discloses a high-capacity cylindrical lithium ion battery. Tab-position end face is shaped; a high frequency oscillation and pressure are applied on to make the foil bodies softened in the scope of 0.1-6.5 mm. At the instant of high-frequency oscillation, the rigidity of the foil body is greatly decreased; and the foil bodies are mutually wound and compressed together, so that the weight density of the foil body in unit volume is increased and meanwhile, the rigidity of the compressed foil body at the Tab-position end face is greatly increased, thereby laying a firm foundation for laser welding of the 1 Tab-position end face and a current collector, increasing a laser welding effective area of the Tab-position end face and the current collector, and improving the welding strength.

The invention discloses a backward GPP (Glass Passivation Pellet) high voltage diode chip in an automobile module, and a production technology. The technology comprises the following steps of oxidation pretreatment, oxidation, photoetching, single-side oxidation layer removal, diffusion pretreatment, boron diffusion predeposition, boron diffusion, once phosphorus source/boron source diffusion, diffusion aftertreatment, N<+> surface mesa etching, electrophoresis, sintering, oxidation layer removal, nickel plating, gold plating and chip cutting. The obtained chip is in a P<++>-P<+>-N-N<+> type structure. According to the high voltage diode chip and the production technology, the defect of great electric leakage of a geminate axial diode is improved, damage to glass passivation protection during welding of a backward diode in a geminate GPP diode is avoided, an effective welding area is increased, and the whole heat dissipation function of the geminate diode is improved. An N-type substrate slice replaces a P-type substrate slice, and a backward GPP high voltage diode is manufactured in a deep N<+> surface corrosion groove, so that the backward GPP high voltage diode in the automobile module fills a gap in the technical field of domestic automobile modules.

The invention relates to a powder metallurgy brake shoe, in particular to a powder metallurgy brake shoe with a bent welded structure, which comprises a steel backing, a skeleton, a plurality of friction blocks, a brake shoe nose and a stopping block, wherein a brake block is formed on one skeleton by sintering friction blocks; the skeleton is welded onto the steel backing. According to the invention, a plurality of friction blocks are welded onto one whole skeleton at the same time, and then, the whole skeleton is welded onto the steel backing, the powder metallurgy brake shoe has the benefits of large friction area, simple structure, high convenience for processing, short processing periods, low cost, low possibility of looseness and flaking off for brake blocks, and high safety.

The invention relates to a method of steel bar upsetting electroslag pressure welding. First, the steel bar head is upset thick to enlarge the welding area. Then two steel bars are positioned in a vertical docking form. The welding current passes through space between two steel bar upsetting ends by use of a welding machine to form an electric arc process and an electroslag process under the welding flux layer. The electric arc heat and the resistance heat are produced and the steel bars are melted. Then vertical pressure is reinforced on two steel bars so that two steel bars are combined together. After cooling, two steel bars are fixedly connected with each other through a welding package. The method of steel bar upsetting electroslag pressure welding has the advantages that the craft is advanced; the operation is easy; the welding quality is good; HRB500 steel bar has high strength, good ductility, low carbon equivalence, and good weldability; steels are save; the function of the steel bar section in the concrete means is reduced; the bearing capacity of the means is improved; the construction is convenient; and the environmental pollution is avoided. The method has also the advantages of solving problems of complicated welding, low efficiency, and poor quality, being a great invention in the technology of steel bar welding, and having huge economic and social benefits.