12results about How to "Improve structural mechanical properties" patented technology

The invention provides a cam, a wave generator and a harmonic reducer, the cam comprises a cam body, grooves are formed in the circumferential side face of the cam body, and the grooves are continuously or intermittently distributed in the circumferential direction of the cam body; the length of the cam body in the axial direction is H, the width W of any groove in the axial direction of the cam body meets the condition that W / H is larger than or equal to 0.15 and smaller than or equal to 0.3, and after the cam is matched with the flexible bearing, buffer spaces capable of providing elastic deformation and absorbing vibration are formed in the grooves. According to the harmonic reducer, the cam with the groove and the width meeting the design range is designed and constructed in the peripheral side face, the balance weight of the cam is reduced, the contact area between the cam and the flexible bearing is reduced, in the operation process of the harmonic reducer, a buffer space for providing elastic deformation and absorbing vibration can be formed in the groove with a certain span in the axial direction, and the service life of the harmonic reducer is prolonged. Load distribution of the harmonic reducer in the operation process is more uniform, and high-speed, low-noise and small-vibration operation of the harmonic reducer is facilitated.

The invention provides a cam, a wave generator and a harmonic reducer, the cam comprises a cam body, a material reduction area is arranged on the peripheral side face of the cam body, the material reduction area comprises a wavy surface section, and in the section where the axis of the cam body is located, the wavy surface section is in a wavy line shape extending in the axial direction of the cam body; the subtractive areas are continuously or discontinuously distributed in the circumferential direction of the cam body, and after the cam is matched with the flexible bearing, buffer spaces capable of providing elastic deformation and absorbing vibration are formed in the subtractive areas. According to the arrangement, the cam of the wave surface section is designed and constructed in the material reduction area, the self balance weight is reduced, the contact area between the cam and the flexible bearing is reduced, the cam has better structural mechanical performance, in the operation process of the harmonic reducer, a buffer space for providing elastic deformation and absorbing vibration is formed in the material reduction area, and the vibration reduction effect is improved. Load distribution of the harmonic reducer in the operation process is more uniform, and high-speed, low-noise and small-vibration operation of the harmonic reducer is facilitated.

The utility model discloses a composite stiffened barrel forming tool which comprises a plurality of die bodies, a plurality of grooves are formed in the molded surface of each die body, and the die bodies are used for being spliced to form a forming surface matched with the inner surface of a composite stiffened barrel. The soft die assembly is used for forming a cap-shaped rib of the composite reinforced cylinder, and the soft die assembly is arranged in the groove; the end fixing plate is used for supporting the plurality of die bodies; the main body die and the end shaft are used for supporting the end fixing plate. According to the utility model, the defects of looseness, layering, debonding and the like of the combination position of the rib and the wall plate of the reinforced cylinder part are eliminated, and meanwhile, the structural mechanical property of the part is improved.

The invention discloses a seawater mixing self-adaptive novel cementing material as well as a preparation method and application thereof. The cementing material comprises the following components in parts by weight: 30-70 parts of Portland cement, 20-50 parts of an auxiliary cementing material, 5-15 parts of high belite calcium sulphoaluminate cement clinker and / or high belite calcium aluminoferrite cement clinker, 6-14 parts of nano particle sol, 1-3 parts of a water reducing agent, 3-7 parts of a nano particle stabilizer and 28-50 parts of mixing water. The nano particle sol comprises nano silica sol and nano aluminum sol at the same time, and the silica sol and the aluminum sol are connected through-COO <-> formed by dehydration condensation of Si-OH on the surface of the silica sol and-COOH on the surface of the aluminum sol. The cementing material disclosed by the invention has the characteristics of high early strength, steadily improved later strength, strong chloride ion curing capacity and strong chloride ion erosion resistance, and shows excellent durability and seawater erosion resistance.

The application discloses a curve fiber variable stiffness composite structure integration optimization method and belongs to the field of composite structure optimization.The application realizes the method as follows: defining and creating an initial "base ply" of a curve fiber variable stiffness composite structure, constructing a number domain representing the existence of each single layer of the "base ply", establishing a curve fiber variable stiffness composite structure integration optimization problem model integrating the number of plies, the thickness of the plies and the curve fiber laying angle; based on a Latin hypercube sampling test, constructing an index form of a mixed correction mode variable fidelity proxy model; adopting a genetic algorithm to perform discrete continuous mixed variable optimization to obtain a preliminary optimization result; reconstructing an optimization problem containing only fiber path parameters as continuous design variables, adopting a sequential quadratic programming algorithm to optimize and solve the reconstructed optimization problem to obtain a curve fiber variable stiffness composite structure optimization result; and through iterative optimization, the curve fiber variable stiffness composite structure integration optimization is realized.

The present invention provides a metamaterial energy absorption structure based on Boolean operation, including an energy absorption box, the energy absorption box is composed of a plurality of metamaterial structures; the metamaterial structure is composed of a plurality of metamaterial monomers; a thin spherical shell is placed inside a regular polygonal prism, the vertical distance between the center of the regular polygonal prism and each side surface and bottom surface of the regular polygonal prism is less than the radius of the thin spherical shell; the thin spherical shell and the regular polygonal prism are subjected to Boolean operation, that is: the thin spherical shell is placed inside the regular polygonal prism, and the part overflowing from each side surface and bottom surface of the regular polygonal prism is the overflow part, and the thin spherical shell removes the overflow part to obtain the metamaterial monomer. The application of this technical solution can realize lightweight protection and efficient energy absorption of the energy absorption box.

This invention relates to the field of door and window technology, and discloses an aluminum-clad wood door and window corner process, including an aluminum corner structure, a wood frame assembly, and a snap-fit ​​connection mechanism. The process includes the following steps: aligning the boss at the end of the wood frame with the guide groove of the aluminum corner, and inserting the boss into the guide groove at a 45° angle; rotating the wood frame to a vertical position until it is engaged and locked by the snap-fit ​​connection mechanism, and confirming that the wood frame is not loose after locking; applying weather-resistant sealant between the wood frame strip and the wood frame, and using self-tapping screws with anti-loosening structure to fix the wood frame strip and the wood frame together, completing the assembly. By using a standard aluminum corner and snap-fit ​​connection, the automatic engagement characteristic of the snap-fit ​​connection simplifies the on-site assembly process. The improved structure reduces the processing precision requirements of the wood components, reduces the scrap rate caused by dimensional deviations, and improves the utilization rate of raw materials, solving the shortcomings of low on-site assembly efficiency, high dependence on personnel skills, and serious waste of raw materials.

This invention relates to a wide-width high-temperature carbonization furnace, belonging to the technical field of carbon fiber production equipment. The furnace chamber of this invention has an arched top plate, and the connection between the arched top plate and the side plates is a sliding groove engagement. The furnace body contains an ash accumulation chamber, a graphite scraper capable of completely covering the ash accumulation chamber, and a graphite scraper driving mechanism. The ash accumulation chamber is connected to injection and suction ports located on both sides of the furnace body. The arched top plate of this invention, which is slidably supported by the side plates, provides strong structural stability. Furthermore, the movable graphite scraper and ash accumulation chamber within the furnace allow for automatic cleaning of the furnace without shutting down the production line.

The invention provides a cam, a wave generator and a harmonic reducer, the cam comprises a cam body, grooves are formed in the end face of the cam body, the grooves comprise first grooves and second grooves which are distributed in the end faces of the two sides of the cam body respectively, the first grooves are continuously or intermittently distributed around the axis of the cam body, and the second grooves are continuously or intermittently distributed around the axis of the cam body. The second grooves are continuously or discontinuously distributed around the axis of the cam body; the length of the cam body in the axial direction is H, the depth of the first groove in the axial direction of the cam body is h1, the depth of the second groove in the axial direction of the cam body is h2, h1 = a * H, 0.1 < = a < = 0.35, h2 = b * H, 0.1 < = b < = 0.35, and after the cam is matched with the flexible bearing, a buffer space capable of providing elastic deformation and absorbing vibration is formed in the first groove and the second groove. The self weight is reduced, the load distribution of the harmonic reducer in the operation process is more uniform, and high-speed, low-noise and small-vibration operation is facilitated.

The utility model provides a G-shaped end ring structure for a car dumper. The G-shaped end ring structure for the car dumper comprises an end ring body and a car pressing mechanism arranged on one side of the end ring body. The end ring body comprises an upper arc-shaped section, a side supporting section and a lower supporting section; one end of the upper arc-shaped section is provided with a first pre-buried seat used for installing an end ring connecting column, the other end of the upper arc-shaped section is connected with the side supporting section, one end of the lower supporting section is provided with a second pre-buried seat, the other end of the lower supporting section is connected with the side supporting section, and a third pre-buried seat is arranged at the position, corresponding to the connecting position of the side supporting section and the lower supporting section, of the end ring body. The G-shaped end ring structure for the car dumper has the advantages of being high in structural strength, reasonable in design and good in reliability and stability. Through the design of integrating the end ring body and the vehicle pressing mechanism, optimization of the structural design is achieved, the reliability, durability and fatigue resistance of the end ring structure are improved, and the probability that the end ring structure breaks down in the long-term operation process is reduced.

The utility model relates to corrugated steel structure technical field technical field, the utility model provides a kind of compound steel mixed corrugated pipe culvert reinforcing structure, it includes inner corrugated plate and the outer corrugated plate of inner corrugated plate interval arrangement, inner corrugated plate and the outer corrugated plate between being equipped with support part, support part includes support corrugated plate and support arc plate;The upper end of support corrugated plate is set on the outer corrugated plate, lower end is connected with the upper surface of support arc plate, support arc plate lower surface and inner corrugated plate abut, support part is used to support upper corrugated plate and lower corrugated plate, so that the spacing between upper corrugated plate and lower corrugated plate is formed. Through the setting of support arc plate, the load between inner corrugated plate and support corrugated plate can be evenly distributed, the spacing between inner corrugated plate and outer corrugated plate is stabilized, and the compression and deformation capacity of overall structure is improved. Through the above technical scheme, the problem of unstable support of the existing corrugated pipe culvert is solved.

This invention provides a cam, a harmonic reducer, and a robot. The cam includes a cam body with a groove extending radially to the outer edge of the cam body and penetrating the cam body along its thickness. According to this invention, by constructing a groove extending radially to the outer edge of the cam body and penetrating the cam body along its thickness, this design not only reduces the cam's own weight and decreases the contact area between the cam and the flexible bearing, resulting in better structural mechanical properties, but also provides a buffer space for elastic deformation and vibration absorption during the operation of the harmonic reducer. This facilitates high-speed, low-noise, and low-vibration operation of the harmonic reducer, thus meeting the design requirements of the robot.