75results about How to "Improve fit strength" patented technology

The invention relates to a low-temperature-resistant modified asphalt waterproof coiled material. The low-temperature-resistant modified asphalt waterproof coiled material comprises a base substrate,an upper modified asphalt layer, a lower modified asphalt layer, an isolation layer and a covering layer. The waterproof coiled material provided by the invention has the following advantages: excellent low-temperature performance is obtained through component optimization of modified asphalt under the condition of maintaining waterproofness, strength and toughness; and through close cooperation of the modified asphalt with the base substrate, the isolation layer and the covering layer, waterproofness and strength are further reinforced, and the waterproof coiled material is more long-lastingand durable.

The invention discloses a lifting device for a prefabricated concrete outer wallboard and a lifting method of the lifting device and solves the problem of infirm lifting of outer wallboards in the prior art. According to the technical scheme, the lifting device for the prefabricated concrete outer wallboard is characterized by comprising a transverse lifting beam and first lifting chains fixed atthe lower end of the transverse lifting beam and further comprises no less than two groups of lifting assemblies matched with the first lifting chains to lift the prefabricated concrete outer wallboard; each lifting assembly comprises a metal pipe embedded in the upper end of the prefabricated concrete outer wallboard and a supporting block mounted on the inner side of the pipe wall of the metal pipe, the corresponding first lifting chain penetrates through the metal pipe, a supporting groove allowing the first lifting chain to penetrate is formed in the supporting block, and the bottom surface of the supporting groove is a downwards-bulging arc surface. By the aid of the lifting device for the prefabricated concrete outer wallboard, the prefabricated concrete outer wallboard is lifted more safely and firmly.

The invention discloses adjustable aluminum alloy steel plate surface drilling equipment. The equipment comprises a transmission positioning frame, wherein a fixed batten is slidably installed on a top end face of the transmission positioning frame, a first hydraulic cylinder is slidably installed on a surface of the fixed batten, and a synchronous drilling mechanism is installed at a power outputend of the first hydraulic cylinder. The drilling equipment is advantaged in that three hole sites can be drilled at the matching site of each steel plate at the same time, drilling efficiency is improved, and problems that in order to achieve firm connection and combination in the existing steel plate machining process, three or four hole sites are generally drilled at each matching site of thesteel plate, the matching strength between the steel plate and other plates is improved, and drilling efficiency is reduced due to the fact that drilling is generally conducted one hole site by one hole site in the existing numerical control equipment drilling process are solved.

The invention relates to a production method of low-cost easily-welded steel and belongs to the technical field of metal rolling. According to the technical scheme, the production method is characterized in that alloy elements for improving the welding performance are not required to be added, the content of easily-welded soft-phase ferrites in the microstructure of hot rolling strip steel is controlled on line to account for 70%-95%, and the content of difficultly-welded hard-phase pearlites in the microstructure of the hot rolling strip steel is controlled on line to account for 5%-30%; and an accelerated cooling manner is adopted, the cooling rate is increased by 5-15% on the basis of the original cooling rate, after acceleration, the cooling rates of strip steel laminar cooling water-cooling sections with different thicknesses and sizes are controlled at 65-105 DEG C/s, and the cooling rate of laminar cooling in the whole stage is controlled at 12.56-19.4 DEG C/s, so that the nucleation rate of phase transformation is increased, and the grain growth slows down. According to the production method, the product with the mechanical property and the welding property which are well matched is obtained by controlling the microstructure of the hot rolling strip steel, and the welding quality of the strip steel and the labor productivity are improved; the optimization of alloy compositions is not required, the welding performance is improved by optimization of a production technology, the low-cost production is realized, and the market competitiveness of hot rolling products and cold rolling products is further increased.

The inventions provides a square tube beam-column joint and a construction method thereof and belongs to the field of steel structures with an aim to solve the problem that existing beam-column jointconstruction is low in efficiency and strength. The square tube beam-column joint comprises a square tube column and a beam, the column comprises four outer column plates and four inner column plates,and the inner column plates enclose to form a grouting channel; the column comprises four round tubes, each round tube comprises an inner short round plate, an outer short round plate, an inner longround plate and an outer long round plate, the outer side of the inner short round plate is adhesively fixed with the outer side of the inner long round plate of the neighboring round tube, the outerside of the outer long round plate is flushed to the outer side of the outer short round plate of the neighboring round tube to form the outer column plate, and the inner long round plate forms the inner column plate; the column further comprises an inner node plate, the periphery of the inner node plate are welded to the inner side of the inner column plate, a grouting hole is arranged in the center of the inner node plate, and each of the inner column plate and the outer column plate is provided with a running hole; the column further comprises four beam connecting tubes which penetrate therunning holes, concrete mortar is poured into the grouting channels, and ends of the beam are fixedly sleeved in the beam connecting tubes. The beam-column joint is high in strength and construction efficiency.

The invention discloses an improved intelligent automatic production line for doors and windows. The improved intelligent automatic production line is used for automatic production and installation ofouter frames and inner sashes of the doors and the windows. The improved intelligent automatic production line for the doors and the windows comprises a discharging mechanism, an inner sash assembling mechanism, an outer frame assembling mechanism, a conveying mechanism and a numerical control mechanism, wherein the numerical control mechanism is connected with the discharging mechanism, the inner sash assembling mechanism, the outer frame assembling mechanism and the conveying mechanism and controls the discharging mechanism, the inner sash assembling mechanism, the outer frame assembling mechanism and the conveying mechanism. According to the improved intelligent automatic production line for the doors and the windows, inner sash profiles and outer frame profiles are assembled in advance to form the doors or the windows, and subsequent installation in actual conditions is facilitated. Products produced through the improved intelligent automatic production line for the doors and thewindows are firm in structure and long in service life, the production process is stable and orderly, safety is high, the production cycle of the products can be effectively shortened, and productionefficiency is improved. The invention further discloses an improved intelligent automatic production method for the doors and the windows.

The invention discloses to a mother linear isolated grounding combined switch which comprises a shell body, a first conductor, a grounding contact, a second conductor and a moving contact. The shell body has two first openings set in the first direction and two second openings set in the second direction, and the first direction is vertical to the second direction. A first static contact is directly and concavely set on the first conductor. The grounding contact is connected with the shell body and arranged in the shell body. A connection seat is convexly set within the inner end of the second conductor is bent into a concave connection seat. The connection seat is provided with a second static contact, a moving channel is formed in the second static contact, is vertical to the first direction and is located between the first static contact and the grounding contact. The moving contact can be linearly connected in the moving channel in a movable way, and the moving contact moves linearly to contact the first static contact and the grounding contact selectively. In addition, the axis of the first static contact, the moving channel of the second static contact, the moving route of the moving contact and the axis of the grounding contact are coincident and paralleled to the second direction.

The invention discloses an externally-threaded structure matched with an internal thread of a wedge-shaped anti-loose thread. The externally-threaded structure comprises an externally-threaded body. Each external thread section of the externally-threaded body comprises a guiding side, a follower side, a top and a bottom, wherein the top and the bottom extend between the guiding side and the follower side; each top is a circular arc surface formed by extending from the guiding side to a joint of the follower side in an arc mode; and each circular arc surface can be in point contact fit with aninternal thread tip in the cooperative tightening process of the external thread and an internal thread. The structure can be freely matched with traditional internal threads of JB/T10971 30-degree wedge-shaped anti-loose threads, and the matching strength is enhanced; the structure is freely matched with standard internal threads, and the use and mechanical properties are not affected; noise caused during screwing with the internal threads can be lowered; and the screwing degree of freedom is increased, and the labor intensity during installation is relieved.

The invention discloses a kingpin installation locking structure. The structure comprises an I-beam, a kingpin and a steering knuckle. The steering knuckle comprises a top and a bottom, and steering knuckle through holes are respectively formed at the top and at the bottom. The I-beam is provided with an I-beam through hole. The I-beam is arranged between the top and the bottom of the steering knuckle. The kingpin penetrates through the steering knuckle through holes and the I-beam through hole, and the kingpin is rotatably matched with the I-beam. The kingpin is provided with a lubricating flow passage. The starting point of the lubricating flow passage is arranged at an end of the kingpin. The ending point of the lubricating flow passage is formed on the wall of the kingpin which is arranged inside the I-beam through hole. According to the kingpin installation locking structure, a groove is not provided with the I-beam, and therefore the strength of the I-beam is improved. The kingpin is provided with a lubricating flow passage therefore the smoothness of the rotation between the kingpin and the I-beam is ensured, meanwhile, the kingpin is fixed to the steering knuckle, the abrasion of the end cap and the block cap of the kingpin is prevented.

A deep cavity type hot extrusion mold for aluminum alloy joint members and a preparation method thereof belong to the fields of hot process molds and designs thereof, and are applicable to hot extrusion mold design and hot extrusion formation of aerospace joint members. The mold includes an upper mold plate (1), a punch fixing plate (2), a stress ring (3), a die (4), a die plate (5), a lower moldplate (6), a top rod (7), a punch (8) and a position limiting block (9). The mold has the advantages that a guide design between the punch (8) and the die (4) ensures that the mold is intact in profile without misalignments when closed without help of a guide device such as a guide post and a guide sleeve; that two-stage transition steps of the top rod (7) and a withdrawing design can not only increase the fitting strength of the top rod with the die but also reduce edge extrusion to facilitate demolding of a member; the overall shape of the mold is a circumferential type so that a medium frequency induction heating method can be adopted with high heating efficiency and good temperature uniformity; and the aluminum alloy joint members formed by the mold have stable quality, high dimensional accuracy and profile precision.

The invention discloses a construction technology of a rock wool board outer wall heat preservation system. The construction technology solves the problem that a rock wool board at the present stage is prone to disengaging from an outer wall body. According to the technical scheme, the construction technology of the rock wool board outer wall heat preservation system is characterized by comprisingthe following steps that S100, an outer wall surface is pretreated; S200, a rock wool board is pretreated; S300, the rock wool board is installed on the outer wall body, the rock wool board and the outer wall body are bonded and fixed through a heat preservation adhesive, and the fixing strength of the rock wool board and the outer wall body is further enhanced through combination of an expansionscrew sleeve, an expansion bolt, a positioning plate and an installation nut; and S400, an outer decorative surface is laid. The probability that the rock wool board falls off from the outer wall body is reduced through the construction process of the rock wool board outer wall heat preservation system.

The invention relates to the technical field of plastic floor, specifically to a floor anti-deformation method. The method uses a plastic floor, and the plastic floor comprises a support mechanism, aprotection mechanism, a sewage collection mechanism and a sterilization mechanism; support height of the support mechanism is quickly adjusted by an adjusting mechanism, so as to adapt to installationrequirements of various terrains, and during installation, only installation plates need to be buckled into an installation groove, the method is easy to operate, fast to install, and capable of effectively improving the coordination intensity through coordination teeth between the installation plates; the sewage collection mechanism is capable of collecting the waste to avoid ground pollution and facilitate unified cleaning, and solid-liquid separation is achieved through arranging filter holes and sewage tanks, so as to speed up discharge of liquid waste and reduce obstacles; the sterilization mechanism is capable of effectively performing sterilization and disinfection on a culture area to avoid bacterium breeding.

The invention discloses an automobile front lower swing arm assembly which comprises a lower swing arm body assembly (1), wherein a ball head assembly (2) and a front bushing (3) are arranged on the lower swing arm body assembly (1); a swing arm (16) is arranged between the ball head assembly (2) and the front bushing (3); a front bushing connecting rod (4) is arranged inside the front bushing (3). The automobile front lower swing arm assembly is characterized in that the lower swing arm body assembly (1) is made of aluminum alloy; projection of the inner side surface of the swing arm (16) on the horizontal plane comprises a first straight line (5) parallel to the horizontal plane and an arc line (6) connected with the first straight line (5). According to the provided automobile front lower swing arm assembly, the bearing capability requirements after the material is changed can be met, and transmission mechanisms such as a transmission shaft can be avoided, so that the weight is lightest, the cost is low, the universality is good, the mounting is convenient, the reliability is good, and the rigidity adjustability of the front bushing is good.

The invention relates to a manual operation and electric operation matching switching mechanism of an electric actuator. The mechanism comprises an output shaft; the upper end of the output shaft is coated with a hand wheel base fixedly connected with a hand wheel; the upper part of the output shaft is coated with a bearing; the bearing is coated with a bearing base; the middle part of the output shaft is coated with a shaft sleeve; the shaft sleeve is coated with a worm wheel; the output shaft between the bearing base and the worm wheel is coated with a slide block; three upper bosses extend at the upper end of the slide block in the vertical direction, and two lower bosses extend at the lower end in the vertical direction; through holes matched with the upper bosses are formed in the side wall of the bearing base; grooves matched with the upper bosses are formed in the lower end of the hand wheel base; groove holes matched with the lower bosses are formed in the upper end of the shaft sleeve; and a first spring is arranged between the bearing base and the slide block. The mechanism further comprises a cam part for driving the slide block to axially move. The manual operation and electric operation matching switching mechanism of the electric actuator, provided by the invention, is simple and reasonable in structure, low in machining cost and higher in bearing capacity.

The invention relates to a work fixture for grabbing injection parts of a doll toy. An installation plate is installed on a mechanical arm and moves along with the mechanical arm. Three contact pins are arranged in the parts, corresponding to three water drainage openings of the injection parts of the corresponding doll toy, on the installation plate, and the shape of the ends of the contact pins are consistent with that of conical holes of the water drainage openings. The installation plate is further provided with a water drainage channel and a stripping mechanism, wherein the water drainage channel is used for discharging waste materials, and the stripping mechanism is used for clamping the injection parts of the doll toy when the injection parts of the doll toy are demoulded. The work fixture is simple in structure, high in automatic degree, free of hand fit work and capable of greatly improving the working efficiency; the contact pins are installed on the work fixture, the ends of the contact pins and the opening holes of the water drainage openings are arranged to be conical so that automatic correction can be carried out in a certain offset degree when the contact pins and the water drainage openings cooperate by means of the shape feature of the contact pins and the water drainage openings, the mutual cooperation strength can be improved as well, relative movement is effectively prevented, and therefore the grabbing accuracy and positioning precision are improved.