118results about How to "Improve joint quality" patented technology

A floorboard and an openable locking system therefor comprise an undercut groove on one long side of the floorboard and a projecting tongue on the opposite long side of the floorboard. The undercut groove has a corresponding upwardly directed inner locking surface at a distance from its tip. The tongue and the undercut groove are formed to be brought together and pulled apart by a pivoting motion which has its center close to the intersection between the surface planes and the common joint plane of two adjoining floorboards.

The invention belongs to a machining process device of an aerospace product, and in particular discloses a positioning support device used for stirring, rubbing and welding a circular seam of a flange disc of a top cover of a storage box. The machining process device comprises a positioning supporting rotary support, wherein a circular base plate is arranged above the positioning supporting rotary support; an outer pressing ring is arranged above the circular base plate; round holes coaxial with a central hole at the lower bottom surface of the positioning supporting rotary support are arranged in the circular base plate and a center of the outer pressing ring; a central shaft is arranged inside the hole; the lower end of the central shaft is fixed on the positioning supporting rotary support; an outer clamping ring is arranged on the circular base plate; the outer clamping ring is connected with the outer pressing ring through a fastening structure; and a lock wire nut is arranged at the top end of the central shaft. The outer clamping ring, the outer pressing ring and the unique fastening structure have a positioning clamping function to a whole welding product; the outer clamping ring and the central shaft are concentric so as to have a function of positioning a rotation center; a design of the fastening structure has a transition function to connection of a whole positioning support device in a mode that bearing outer pressure is converted into a clamping force, and thus the machining process device is applicable to requirements on high precision in welding and assembling.

A self-piercing rivet of a special rivet geometry is described, which in particular is suitable for joining high strength steel sheets, but can also be used for other metal sheets. The self-piercing rivet is in particular characterized by a special underhead geometry as well as a special geometry of the rivet foot (cutting region). Thus the self-piercing rivet has an underhead chamfer which with a radial plane of the self-piercing rivet encloses an angle of 20°+5°/−5° and merges tangentially into the cylindrical outer surface of the rivet shank via a radius. In the region of the rivet foot the self-piercing rivet has a plane shank face, which extends essentially at a right angle to the rivet axis and which merges “smoothly” into the cylindrical inner surface via a shank inner surface and a radius. In comparison to conventional self-piercing rivets the special rivet geometry enables lower joining forces and tensile forces in the joining operation, an optimized load bearing performance and an optimum joint quality of the self-piercing rivet joint as well as minimum gap formation between the rivet and the metal sheet.

A sheet fastening apparatus and method are provided. In another aspect of the present invention, a die assembly for forming a joint between sheets of material is disclosed wherein the die assembly includes an anvil, at least one die blade disposed adjacent to and overlapping a punch-side of the anvil, a flexible retainer, and a shield that coaxially and radially surrounds a portion of the anvil and/or die blade.

The invention relates to an active agent applying to magnesium alloy welding, belonging to the material engineering technical field, which is characterized in that: the active agent is composed of TiO2, Cr2O3, MgO, MnO2, and CaO and the weight proportion is TiO2: 40 to 70%, Cr2O3: 5 to 20%, MgO: 2 to 20%, MnO2: 5 to 20%, CaO: 5 to 20%. Firstly, the active agent is grinded to powder, then is dried and cooled; secondly, the active agent is mixed with acetone or alcohol and then is equally coated or sprayed on the surface of the welding bead; finally, after the acetone or the alcohol is volatilized, welding can be implemented. The active agent has the advantages that: the weld penetration can increase at least twice; the weld joint of magnesium alloy is well moulded; the joint is of high quality and the intensity can be above the 95% of the intensity of the parent metal; the deformation due to welding is reduced; the invention is of easy operation and high productivity.

The invention proposes a new aluminium compound material liquid phase impacting diffusion welding process which belongs to diffusion welding technology field. The invention solves the low quality of aluminium compound material diffusion welding. The invention mainly includes: the welding thermal reservation selection is in the aluminium compound material liquid and solid phase temperature period, in the temperature range whose liquid phase volume piece-rate is 20-35% correspondent to the base body liquid phase, the thermal reservation time is 30 seconds, at first applies initial welding pressure is 5MPa, the impacting pressure is 80-120MPa, the impacting speed is applied after the welding temperature thermal reservation for 5-10 seconds, the impacting temperature is 350-700mm/s. the impacting allying time interval is 0.0001-0.01 seconds. The invention applies to aluminium compound material made up of aluminum material 6061, 6063, 2014, 2A12, 5A06, 6A02, 7A04, ZL101, ZL102 and enhancing material SiC, Al2O3, TiC, AIN.

The invention discloses a linear friction-current compound heat source welding method for solving the technical problem of weak joint quality in welding of a large-area workpiece by a traditional linear friction welding method. Current is introduced into a friction pair when performing linear friction welding; and a welding interface is heated by using resistance heat. When a welding interface material reaches a visco-plastic state and generates deformation, that is, when a stable friction phase is reached, the current is cut off by a power supply control device; quick workpiece alignment is controlled; and higher welding upset force is applied to the workpiece to finish the workpiece welding. A compound heat source heating mode can realize the welding of high-heat-strength and large-area workpiece, relieves the load of a machine tool, is stable in vibration output of the machine tool, is excellent in controllability, can form an excellent closed welding interface in the welding process, and improves the joint quality in linear friction welding of the large-area workpiece.

A center pillar includes a first reinforcement panel which is arranged between an outer panel and an inner panel, comprises a bottom wall portion, both-side vertical wall portions extending in a vehicle width direction from the bottom wall portion, and both-side flange portions, and has a cross section formed in substantially a hat shape. A second reinforcement panel comprising a bottom wall portion and both-side vertical wall portions and having a cross section formed in substantially a U shape is arranged inside the first reinforcement panel. The second reinforcement panel is joined to the first reinforcement panel such that only the bottom wall portion and one of the both-side vertical wall portions are joined to the bottom wall portion and one of the both-side vertical wall portions, respectively.

A pipe joint consisting of the end portions of pipe sections (1, 2) to be joined together, said end portions having a collar (3, 4) preferably protruding substantially perpendicularly, and of flange parts (8, 9) placed on different sides of the collars relative to the junction and tightened by means of suitable fastening elements, such as screws (10) and nuts (11). The flange part (8, 9) has been arranged to be adaptable against the shoulder of the collar (3, 4), most suitably against its back surface (6, 7), at least when the joint is being tightened.

The invention relates to a novel method for configuring and connecting steel ropes. In order to solve the problems of low strength, low safe reliability, and the like of an interface in vulcanized glued connection with a traditional steel rope core conveyor belt, a novel method for configuring the steel ropes is adopted for increasing the ratio of staggered arrangement of the steel ropes at two ends of the conveyor belt and increasing the insert-plug resistance of the steel ropes in rubber, high-strength steel ropes are connected with a lock latch, the steel ropes in parallel staggered arrangement are tensioned and locked, the originally parallel arrayed steel rope main bodies are connected together and a tensioning force is supplied, so that the quality and safety of the connector of the steel rope core conveyor belt are essentially increased, the constant strength connection of the interface and the conveyor belt is realized and the usage with same service life is realized. Adhesive and solidifying rubber are used for gluing a thin rubber sheet, a reinforcing rubber sheet, edge rubber, upper covering rubber and lower covering rubber and wrapping the steel ropes in the area of the interface of the conveyor belt, so as to finish the cold splicing connection of the interface of the steel rope core conveyor belt. The novel method is huge in practical significance.

The invention discloses a semi-automatic jointing method for open-end-spinning, and belongs to the technical field of spinning. The traditional semi-automatic jointing method has the disadvantages of low jointing efficiency, low jointing quality, limited rotation speed of a revolving cup during the jointing and heavy manual workload. The semi-automatic jointing method comprises a jointing preparation process and a jointing process, wherein a winding mechanism automatically raises a creel after receiving a yarn breaking signal; packaged yarn ends are found manually; the length of the yarn ends are fixed, a spinning box is opened for clearing impurities, the spinning box is closed, and the yarn ends are put into a doffing tube; an inductor on the spinning box sends out a jointing request signal; a jointing trolley moves to be positioned at a position of a concrete spindle level after receiving a jointing instruction signal; the revolving cup is rotated and gradually accelerated to ensure that the jointing trolley controls the feeding of cotton slivers and the lead-out of the yarns after the jointing is performed at the revolving speed; the yarns which are led out are in temporary storage transition; the creel automatically descends and starts to wind the yarns; the transition yarns are wound by virtue of package, the processes of leading the yarns and controlling the feeding of the cottons are back to the spindle level of a spinning machine, so that the jointing process is finished; and moreover, the jointing efficiency and the jointing quality are improved, the manual workload is reduced.

The invention provides a laser auxiliary hot-pressure welding device and welding method for connecting titanium / aluminum dissimilar materials. The implementation process of the laser auxiliary hot-pressure welding device and welding method comprises the following steps that titanium alloy base metal and aluminum alloy base metal are arranged on a workbench after being connected in a lap joint mode according to the principle that the titanium alloy base metal is arranged above the aluminum alloy base metal; after a microprocessor is started, according to a preset pressure value and a preset stepping speed of the workbench, the microprocessor controls the rotation speed of a stepping motor, a pressure control valve controls the working pressure of an air cylinder, a pressure test of an idler wheel is conducted first, then pressure by the idler wheel at a welding point on the base metal is transmitted through a pressure sensor, and the air cylinder is controlled in time so as to amend the pressure value; laser beams are irradiated on a weld joint of the base metal connected in the lap joint mode, the idler wheel is used for acting on the dissimilar materials, and the dissimilar materials mutually diffuse under the pressure action so that the purpose of welding can be achieved. According to the laser auxiliary hot-pressure welding device and welding method for connecting the titanium / aluminum dissimilar materials, brittle intermetallic compounds generated when the titanium / aluminum dissimilar materials are connected can be reduced remarkably, welding of thin dissimilar metal plates is easy to realize, welding efficiency is high, welding cost is low, the quality of a connector is high because the content of the intermetallic compounds is small, the welding cost is quite low, and the quality of the connector is good.

The invention relates to a semiconductor device and a manufacturing method thereof. The method comprises steps: a substrate is provided, and an element and an interconnection structure above the element are formed on the substrate; a benzocyclobutene dielectric layer or a polyimide dielectric layer is formed on the substrate; a metal pad is formed on the dielectric layer to be connected with the interconnection structure; and two wafers comprising the dielectric layer and the metal pad are bonded. In order to solve the problems in the prior art, a new material is selected as the dielectric layer in the horizontal wafer Cu-Cu bonding technology, benzocyclobutene (BCB) or polyimide is selected as the dielectric layer, bonding between the upper wafer and the lower wafer is realized, BCB of the upper wafer and the lower wafer can be melted together during the bonding process, a bonding pair free of a void is formed, and the bonding quality is improved. The BCB can serve as a blocking layer, and the problem of metal diffuse (such as Cu diffuse) between the wafers can be solved completely.

A hybrid Friction Stir Welding approach and device for dissimilar materials joining employing Electro-Plastic Effect. The approach and device include an introduction of high density, short period current pulses into traditional friction stir welding process, which therefore can generate a localized softened zone in the workpiece during plastic stirring without significant additional temperature increase. This material softened zone is created by high density current pulses based on Electro-Plastic Effect and will move along with the friction stir welding tool. Smaller downward force, larger processing window and better joint quality for dissimilar materials are expected to be achieved through this hybrid welding technique.

The invention discloses an ultrasonic-welding joining apparatus of a semiconductor substrate. The present invention relates to an ultrasonic-welding joining apparatus and, more particularly, to an apparatus for joining, using ultrasonic welding, a lead frame on a DBC substrate of a semiconductor package. The ultrasonic-welding joining apparatus according to the present invention comprises: a lead-frame loading part for supplying a lead frame; a substrate loading part for supplying a DBC substrate; an index rail in which the DBC substrate and the lead frame are seated; an ultrasonic-welding part for joining, using ultrasonic welding, the lead frame and the DBC substrate seated in the index rail; and an unloading part for carrying out the lead frame and the DBC substrate joined by the ultrasonic-welding part.