82results about How to "Large joint surface" patented technology

Reduction of a bone fragment of a bone fracture at a bone fracture site is accomplished through a minimally invasive access passage utilizing instruments having a working head actuated from a location remote from the bone fracture site, between an insertion configuration dimensioned and configured to present a minimal cross-sectional area for ready passage through the minimally invasive access passage and a working configuration dimensioned and configured to establish an essentially rigid working face of substantially greater cross-sectional area than the minimal cross-sectional area. The working head is actuated into the working configuration and manipulated from the remote location while in the working configuration to engage the working face with the bone fragment and manipulate the bone fragment into an anatomically appropriate reduced position at the bone fracture site.

The invention discloses a shaping method of a bimetallic composite-material brake drum, and relates to the shaping method of the brake drum. The shaping method includes the steps of manufacturing a brake drum jacket with a waved circumferential pipe wall by using a low carbon steel pipe, placing the brake drum jacket in a horizontal centrifugal casting machine, and pouring molten iron at a certain temperature, thus finishing casting in the casting machine and finally obtaining the brake drum compositing two metal materials of low carbon steel and cast iron. The brake drum compositing two metal materials manufactured according to the shaping method provided by the invention can fully bring respective advantages into play, is high in combination quality of an interface, and light in weight.

The invention provides a double composite plastic steel composite pipe and a manufacture method thereof, discloses a method for manufacturing a liquid conveying pipeline with the advantages of high annular rigidity, low material consumption, capability of bearing internal pressure, favorable sanitary performance, long service life, and better comprehensive performance. The basic process comprises steps of: manufacturing a plastic steel strip, manufacturing a plastic steel winding pipe stock by using the plastic steel strip, compounding and winding a metal wire, extruding a hot melt adhesive and coating on an outer surface of the pipe stock and coating a fused plastic on the outer surface of the plastic steel winding pipe stock. Thus both the anti-corrosion performance of plastic and the rigidity of steel belts are utilized; due to the adoption of the embedded steel wire, the internal pressure bearing performance of a buried pipe can be guaranteed; due to the composite structure of the pipe, the consumption of plastic is reduced, and the performance-price ratio of the pipe is greatly improved; and the manufacture method can be used for manufacturing large caliber liquid conveying pipelines, so as to solve the problem that the manufacture of large caliber plastic pipes is difficult in China.

The invention discloses a load-sharing piezoelectric multi-dimensional force measuring device and a method for manufacturing the same, belongs to the field of piezoelectric sensors, and particularly relates to a testing device. The testing device is required for measuring force in three directions, and ranges of the force in the three directions are similar, and are of ten-thousand Newton classes. The method includes reasonably arranging a plurality of expansion pins on the periphery of a piezoelectric three-directional force sensor, and designing the expansion pins with different diameters so as to implement different load-sharing ratios; enabling the four expansion pins which are uniformly distributed to expand under actions of four taper pins so that a base can be tangentially and rigidly connected with an upper cover plate, and sharing load of force acting on the upper cover plate; and enabling the load-sharing ratios to be adjustable. The load-sharing piezoelectric multi-dimensional force measuring device comprises the base, the piezoelectric three-directional force sensor, the upper cover plate, the four expansion pins, the four taper pins, four set screws and a pre-tightening screw. The load-sharing piezoelectric multi-dimensional force measuring device and the method have the advantages that a testing application range of the piezoelectric multi-dimensional force measuring device is broadened by the method, and the load-sharing piezoelectric multi-dimensional force measuring device is wide in application space in fields of machining, aviation and aerospace.

The invention discloses a steel structure tenon-mortise connector which comprises a tenon and a mortise. The tenon is of an I-steel structure, the mortise is a T-shaped steel sliding groove, and the I-steel structure and the T-shaped steel sliding groove are tightly combined in a tenon-mortise mode. In addition, grooves are formed in the two sides of an upper flange of the I-steel tenon in the height direction correspondingly, protruding heads are arranged on the two sides of a flange of the T-shaped steel sliding groove in the height direction correspondingly, and the protruding heads and the grooves are completely matched. The tenon and the mortise are anchored through a fixing bolt, and are connected with a first steel member and a second steel member correspondingly before connected. The invention further provides a connecting method of the steel structure tenon-mortise connector. The connector between the steel members is the tenon-mortise assembled connector, not only is the size of the original members at the joint not reduced, but also the size is enhanced at the joint, and firm connection of the members is guaranteed; and moreover, the combination face of the tenon-mortise connector is large, high section shear-resistance capacity is achieved, and the safety degree is higher.

The invention discloses a process for inlaying alloy teeth of a rock drilling bit. The process comprises the steps of 1, selecting a good-quality high manganese round steel and processing the good-quality high manganese round steel into a liner bushing; 2, carrying out vacuum water quenching, tempering and heat preservation on the processed liner bushing, and then carrying out air-cooling treatment; 3, carrying out finish machining on an inner hole of the linear bushing; 4, performing thermal treatment on the linear bushing machined with the inner hole, and pressing the alloy teeth into the linear bushing under appropriate conditions; 5, performing high-speed shot blasting treatment on the teeth-inlaid linear bushing; 6, accurately grinding the outer circular surface of the teeth-inlaid linear bushing; 7, enabling the teeth-inlaid linear bushing to be in interference fit with teeth holes. The process for inlaying the alloy teeth of the rock drilling bit has the advantages that the liner bushing is arranged to sleeve the alloy teeth, so that the holding force is enhanced by enlarging the effective combination surface by increasing the length, and the magnitude of interference can be reduced appropriately without increasing the alloy cost, and therefore, the teeth can be fixed firmly, and also the drilling bit body and the alloy teeth can be protected against damage; meanwhile, under the protection action of the liner bushing, because the stress is basically eliminated in the process of inlaying the teeth in the linear bushing, the phenomena of alloy tooth breakage and steel body collapse are reduced remarkably, and the service life of the drill bit is prolonged.

A blower fan including a motor having a rotating shaft, a bracket, a fan housing having a cavity, a fan wheel, and fan blades. The motor is disposed on the fan housing via the bracket. An extended portion of the rotating shaft extends into the cavity of the fan housing and connects with the fan wheel. The fan blades are disposed on the rotating shaft and between the motor and the fan housing. On the casing of the motor is disposed with air vents. The bracket forms an annular side wall. A cavity is formed inside the annular side wall. The annular side wall is outfitted with air outlets which are connected with the cavity of the annular side wall and the fan blades are disposed in the cavity.

A planar magnetic device comprising a molded header and a planar core assembly, and a method of making a planar magnetic device. The molded header has first, second, third, and fourth sides and an aperture in the center. The first side has a plurality of terminals positioned through it. The third and fourth sides have upper surfaces that are lower than the upper surfaces of the first side. The planar core assembly comprises planar windings and a core. One side of the planar winding has a plurality of terminals with through-holes so that the primary terminals of the header are positioned through the through-holes. The core surrounds at least a portion of the planar windings. The core is shaped so that a first portion of the core is positioned in the aperture, a second portion of the core is positioned on the upper surface of the third side, and a third portion of the core is positioned on the upper surface of the fourth side.

The invention discloses a fabricated floor system and a construction method. The fabricated floor system is composed of prefabricated ribs and prefabricated floor slabs, or a plurality of prefabricated floor system units which are composed of the prefabricated ribs and the prefabricated floor slabs and prefabricated bottom plates are directly supported on a bottom support for being assembled and connected at a construction site to form the entire floor system, and the entire floor system is supported on a main beam or a pillar after the bottom support is removed. The slabs of the floor systemunits of the fabricated floor system are completely prefabricated, all or most of the ribs and beams of the floor system units are prefabricated in a factory, and the prefabricated ribs (beams) of theadjacent floor system units are connected to the entire rib-beam floor system by adopting cast-in-place concrete laminated ribs (beams), or laminated flanges or pressure grouting during on-site construction installation. According to the fabricated floor system and the construction method, the fabricated floor system is prefabricated in bathes in the factory according to standard rib (beam) slabunits, and a lot of construction period can be saved; and the prefabricated rib (beam) slab units serve as formworks of the ribs (beams), the formworks of cast-in-place laminated ribs (beams) or the laminated flanges are omitted, so that construction is convenient and quick.

The invention relates to a fastener, in particular to a fastener special for connecting an insulation board with a wall. The fastener comprises a board body vertical to the wall surface, a first board body inserted into the insulation board, and a connection board body for connecting the wall, wherein the first board body and the connection board body are positioned on opposite board surfaces of the board body and are parallel to the wall surface respectively. The fastener is characterized in that: the board surface of the board body is provided with a concave-convex part; because the board surface of the board body is provided with the concave-convex part, the bonding surface of the board body and sealant is larger and bonding is firmer. Therefore, the board body and the sealant are prevented from being separated and cracked, rainwater is prevented from permeating, thermal insulation and moisture-proof effects of the insulation board are improved and the service life of the insulation board is prolonged.

The invention discloses an electric-conducting carbon felt and lead tab connection method. The connection method includes the steps of clipping electric-conducting carbon felt and flaky lead tabs according to sizes, and flatly overlaying the flaky lead tabs on one or two sides of a frame of the electric-conducting carbon felt prior to spot welding. The electric-conducting carbon felt and lead tab connection method has the advantages that connection between the lead tabs and the electric-conducting carbon felt is achieved through a spot welding technology, the connection technology is reasonable in design and easy to implement, most importantly, resistance heat formed by spot welding enables the lead tabs to melt locally, liquid lead alloy at the position permeates into seams of the electric-conducting carbon felt, and a mutual jogged structure is formed after cooling; a tightly connected joint is formed through staggered jogging and is nearly doubled in connection strength as compared with that of a product in the same specification in the prior art, and accordingly electric conductivity is also improved remarkably.

A reinforced connection structure between a metal insert and a plastic part. It is composed of a plastic part and a metal insert. The inner section of the metal insert is cylindrical and embedded in the plastic part. At least one number of protrusions, or pits, or through holes, or thorns are provided in the circumferential direction, and any one of the protrusions, or pits, or through holes, or thorns is surrounded or filled by plastic parts. When the plastic part is injection molded, the plastic can pass through the hole or be filled into the pit, thereby increasing the joint surface between the metal insert and the plastic part, and the plastic part is located in the direction of the metal insert, effectively preventing the metal The insert is disengaged from the plastic part.

The invention discloses a manufacturing method of a composite oil pipe and a joint closing device. The joint closing device comprises a pulse current applying device controlled by a machine vision system. In the joint closing process, the machine vision system can track and judge the position with the maximum pipe blank deformation resistance in real time, so that the position of a pulse current applying electrode is adjusted, pulse current is introduced into the position with the maximum pipe blank deformation resistance, intelligent control is achieved, the deformation resistance is reduced,cracks generated by stress concentration are reduced, the extrusion force of a force application mechanism of the joint closing device is reduced, and the joint closing effect is better guaranteed. The composite oil pipe adopts the manufacturing method of metallurgical composite steel plates, molding and welding, is high in bonding strength and excellent in comprehensive performance, can adapt tohigh-temperature, high-pressure and high-corrosion severe environments, and reduces the exploitation cost of an oil and gas field containing acid gas.

The inventionrelates to the technical field of the production of an amorphous alloy product, and in particular relates to a joining method of an amorphous alloy electronic product shell and a middle plate. The method comprises the following steps: step one, pre-bonding; step two, heating; step three, pressing according to a molten-state gravity effect; and step four, cooling and sizing. By use of the joining method disclosed by the invention, a convex column structure of the amorphous alloy electronic product shell is heated to Tg and more, wherein the Tg is the glass transformationtemperature, and the heating process is controlled according to a TTT graph so as to prevent convex column structure of the amorphous alloy electronic product shell from generating the crystallization. Furthermore, a chamfer structure or a circular concave structure region can be filled with amorphous alloy in the bonding so as to form an inverted buckling structure, thereby enhancing the bonding strength performance by increasing the bonding surface in the bonding. The bonding strength of theamorphous alloy electronic product shell and the middle plate is good, and the method has the advantages of being mass in production, high in production efficiency and low in production cost.