41results about How to "Improve static strength" patented technology

Light-weight, heat-managing structures feature open-cell lattice, honeycomb, and/or corrugated (prismatic) arrangements in their substructures, combined with heat pipe/heat plate arrangements for managing heat to which the structures are subjected. The structures are well suited to aerospace applications and may be employed in the leading edge of wings or other airfoil-shaped components; gas turbine engine components; rocket nozzles; and other high-heat, high-stress environments.

The invention provides laser cutting equipment and method. The laser cutting equipment comprises a feeding assembly, a first dual-linkage mechanical arm, a cutter wheel cutting assembly, a front laser cutting assembly, a turning-over assembly, a reverse laser cutting assembly, a second dual-linkage mechanical arm, a laser broken piece assembly and a sorting assembly. The front laser cutting assembly and the reverse laser cutting assembly perform laser cutting on a sample through bessel beams, and the focused bessel beams are focused light beams with a large focal depth, so that compared with gauss beams, the thick sample to be cut can be cut effectively, and thus the application range of the laser cutting equipment is broadened. Besides, the laser cutting assemblies and the laser broken piece assembly are adopted to cut the sample twice correspondingly, a finished product can be separated from waste, and cutting efficiency is high. In addition, the laser cutting equipment has the advantages that the cutting path is narrow, edge breakage of the surface of the cut product is small, the conical degree is small, the static pressure strength is high, an abnormally-shaped product can be cut, and the like.

The invention relates to a FeMn base powder catalyst containing a rare-earth additive agent for artificially synthesizing diamond. The FeMn base powder catalyst comprises the following alloy components in percentage by weight: 28-40 percent of Mn, 0-10 percent of Ni, 0-5 percent of Co, 0.1-0.5 percent of C, 0.01-1.0 percent of rare-earth additive agent, 50-800ppm of O, 50-500ppm of N and the balance of Fe, wherein the rare-earth additive agent is one of Ce, La and Er. The content of oxygen of a preferable powder catalyst product is not more than 300ppm, the content of nitrogen is not more than 150ppm; the product is prepared by adopting an inert gas pneumatic atomizing process; catalyst powder is in a ball shape or similar to the ball shape; and the alloy components are uniform. The Phi 39mm cavity mixed unit yield of diamond synthesized by adopting the catalyst reaches more than 105 karats/piece, the proportion of the static pressure intensity higher than 20kg is larger than 40 percent, and the proportion of a granularity range of 35/60 in the diamond is more than 76 percent. The FeMn base powder catalyst has higher TI and TTI values, better heat stability and better abrasive resistance and is an ideal raw material for manufacturing high-efficiency diamond dies.

The present invention relates to a roving machine with a bobbin rail, a flyer rail and a reel change mechanism. The bobbin rail can be equipped with movably in a vertical direction. The flyer rail is equipped fixedly. All flyers of the flyer rail are respectively provided with a central spindle. The reel change mechanism is connected with a frame structure which bestrides the roving machine. The reel change mechanism is provided with a base component which is movable in a vertical direction relatively to the adjustment height. The base component is provided with a change platform which is equipped movably in a horizontal direction. According to the invention, the change platform (10) is provided with a conveying device (12) which is provided with a case carrier (11) for receiving roving reels (8) or empty bobbins (9). Furthermore the conveying device (12) can be positioned in an area of the roving machine (1) such that empty case carriers (11) or case carriers (11) provided with the empty bobbins (9) are alternatively positioned exactly below central spindles (6) of a flyer (5) of the flyer rail (4).

The invention relates to a thread-free floating type supporting bar, in particular to a construction member used for fixing a spiral propeller onto a coal mill barrel in a BBD steel ball coal mill. The invention solves the problems that the existing supporting bar is inconvenient for maintenance, has poor strength and is easy to break and compensatory is poor. The shaft sleeve of the supporting bar main body penetrates a hole opened on the side wall of a central tube and is fixedly connected with the central tube, one end of the supporting bar main body is inserted and arranged in one end of the supporting bar main body shaft sleeve outside the central tube, a disk spring is arranged in the other end of the supporting bar main body shaft sleeve inside the central tube, one end of the supporting bar main body is connected with the disk spring by contact, and the other end of the supporting bar main body shaft sleeve is connected with a gland by a connecting piece in a dismountable way. The invention has simple and feasible mounting, can be dismounted and can be repeatedly used; clearance compensation changes the stress state of the supporting bar, thus improving the strength of the supporting bar; and different axiality compensation between the spiral propeller and the barrel optimizes the working condition of the spiral propeller.

A sintered gear serving as a mechanical structure component is a mechanical structure component made of a metal sintered body, and includes a base region; and a high density region formed so as to include a maximum stress position at which a maximum tensile stress or a maximum shear stress is applied, and to include a surface, in which the high density region is lower in porosity than the base region. A surface hardened layer is formed in a region including the surface by performing a hardening process.

The invention relates to the field of wind power generators, in particular to a connecting rod flange for a fan tower barrel and the fan tower barrel. The connecting rod flange for the fan tower barrel comprises an upper flange ring, a lower flange ring, a connecting rod and a fixing device; and one end of the connecting rod is rotationally arranged on the upper flange ring, and the other end of the connecting rod is arranged on the lower flange ring through a fixing device. The fan tower barrel comprises a barrel body and the connecting rod flange, and the connecting rod flange is arranged onthe outer wall of the barrel body. According to the fan tower barrel, the connecting rod is arranged on the flange, and the connecting rod has a certain length and is fixed with a truss or an inhaulcable, so that the diameter of a bottom structure is effectively increased, and the static strength of the integral structure is increased; and reinforcing ribs are arranged on the barrel body, so that the static rigidity of the fan tower barrel can be improved, the deformation can be inhibited, the buckling critical load factor of the fan tower barrel can be effectively improved, the low-order integral modal frequency is improved, the rigid modal design of the tower barrel is facilitated, the energy of a vortex joint can be greatly changed, and the design of anti-vortex-induced vibration is facilitated.

The invention discloses a cryogenic treatment method of diamond, which includes the steps of: placing 30/35-mesh and 35/40-mesh diamond in a liquid nitrogen cryogenic box to perform cryogenic treatment, wherein the temperature in the cryogenic box is stepwise reduced from room temperature, 20 DEG C, to -180 DEG C, and then is slowly increased to room temperature; then the temperature is maintainedfor a certain time and then is increased to 120 DEG C and maintained for a certain time; finally the temperature is slowly reduced to room temperature. The method can significantly increase the entire static pressure strength of two batches, 30/35 meshes and 35/40 meshes, of diamonds, wherein the number of diamond granules, of which the static pressure strength ranges from 600-800 MPa after the cryogenic treatment, is increased by about 20%. The cryogenic treatment can permanently change the crystal structure of interior of the material, solve crystal dislocation and release a part of residual stress, thereby affecting the performance of the material.

A multi-phase hot-rolled steel sheet having improved strength in an intermediate strain rate region has a chemical composition comprising, in mass percent, C: 0.07-0.2%, Si+Al: 0.3-1.5%, Mn: 1.0-3.0%, P: at most 0.02%, S: at most 0.005%, Cr: 0.1-0.5%, N: 0.001-0.008%, at least one of Ti: 0.002-0.05% and Nb: 0.002-0.05%, and a remainder of Fe and impurities. The area fraction of ferrite is 7-35%, the grain diameter of ferrite is in the range of 0.5-3.0 μm, and the nanohardness of ferrite is in the range of 3.5-4.5 GPa. A second phase which is the remainder other than ferrite contains martensite and bainitic ferrite and/or bainite. The average nanohardness of the second phase is 5-12 GPa, and the second phase contains a high-hardness phase of 8-12 GPa with an area fraction of 5-35% based on the overall structure.

An aluminum-alloy clad material includes a skin layer clad to and covering at least one surface of a core layer. The core layer is composed of an aluminum alloy containing Cu: 3.8-4.9 mass %, Mg: 1.2-1.8 mass % and Mn: 0.3-0.9 mass %. The core layer has an area number density of microvoids that have a circle-equivalent diameter of 0.5 μm or greater that is 100/mm² or less. The skin layer has an Al purity of 99.5 mass % or greater. A method of manufacturing a wrought material from such an aluminum-alloy clad material includes heating the wrought material to the solution heat treatment temperature of the core layer at a temperature-rise rate of 50° C.-200° C./h.

The invention provides a method for reinforcing steel pipe joints by upward movement of a groove-shaped collar plate. A branch pipe is perpendicularly welded at the middle position of the top surface of a main pipe with the reinforced joints; the groove-shaped collar plate is welded on a pipe body of the branch pipe in a sleeving manner and is welded on two sides of the main pipe with the reinforced joints in the direction of the axis of the main pipe or in the direction perpendicular to the axis of the main pipe or welded on the upper surface of the main pipe with the reinforced joints, so that a surrounding welded joint, a center connecting welded joint and a double-side connecting welded joint are formed; and when the groove-shaped collar plate is arranged in the direction of the axis of the main pipe with the reinforced joints and the width of the surface of the main pipe with the reinforced joints difficultly guarantees welding of the double-side connecting welded joint, a flange of the groove-shaped collar plate can be welded with the side wall of the main pipe with the reinforced joints. The method for reinforcing the steel pipe joints by upward movement of the groove-shaped collar plate is not only suitable for reinforcement, repairing and strengthening of the steel pipe joints during service period, but also is suitable for machining the reinforced joints of steel pipe structures in the design stage. In the method, the collar plate and the welded joints of the branch pipe move upwards, the static strength of the joints can be improved, the welded joints of the main pipe and the branch pipe can be protected, brittle failure of the welded joints is avoided, and therefore, the anti-seismic ductility performance of the welding joints is improved.

A fiber composite component as a structural component of an aircraft, encompasses a mat-shaped, electrically conductive fiber material embedded in several layers into a synthetic resin matrix, wherein individual fibers protrude as free fiber ends from the flat plane of the mat-shaped fiber material, so as to establish an electrical bridge connection between adjacent layers of the fiber material through an interspersed synthetic resin layer. A device for manufacturing such a fiber material is also described.

The invention discloses a production technology for an engine cylinder cover bolt. According to the technology, through specific heat treatment and hydrogen content control, the obtained engine cylinder cover bolt meets the standard, and the breakage probability is greatly reduced.

The invention discloses an expandable air barrier device and a method of using the same for injection remediation of underground water pollution. The expandable air barrier device comprises a main air injection pipe, a rubber cylinder assembly made of elastic materials is sleeved to the middle of the main air injection pipe, and a group of rubber cylinder connectors, protection sleeves, middle connectors and connecting sleeves are symmetrically sleeved on the upper portion and the lower portion of the rubber cylinder assembly of the main air injection pipe. The connecting sleeve I is connected between the middle connector I and the upper connector, the upper connector is provided with an upper port used for connecting the main air injection pipe with an external air injection pipe, an inflating port is arranged beside the upper port, the upper end of the inflating port is connected with an external inflating pipe, and the lower end of the inflating port extends downward to be communicated with an air injection cavity. Quick and one-way air injection in an air injection well can be guaranteed by means of the expandable air barrier device and the method, and the requirements of large-scale in-situ remediation of underground water in volatile organic pollutant areas by air injection technique can be met. Further, the expandable air barrier device and the method promote development of the underground water air injection technique and have wide application prospect.

A cross shaft member has four shaft portions arranged in a generally cross-shape around an outer periphery of a body portion thereof, and a recessed portion is formed in the body portion, and has a depth in a direction perpendicular to a plane in which axes of the four shaft portions lie. Four ridge-like thickened portions are formed in the recessed portion, and are equally spaced from one another, and extend diagonally with respect to the axes of the shaft portions in the plane.