49results about How to "Uniform strain" patented technology

The invention relates to a method for simultaneously rolling and expanding two trapezoid-cross-section flange ring forge pieces. The method comprises cutting a cylindrical billet into material sections; heating the material sections from room temperature to austenitizing temperature evenly and keeping warm; then heading, punching and chambering the material sections to be manufactured into ring piece blanks to be rolled and expanded; baking again and heating the obtained blanks to reach target temperature and keep warm; placing the obtained blanks into a hole mould of a ring rolling machine formed by an irregular-shaped driving roller and an irregular-shaped core roller to be rolled, expanded and formed; achieving the ring forge pieces which is narrow at two ends and wide in middle and with the axial height as twice as the height of a target trapezoid flange; cutting the ring forge pieces from the middle of the axial height, symmetrically dividing a work piece into two parts to obtain two trapezoid-cross-section flange ring forge pieces; and finally turning the forge pieces into end product flanges. The method for simultaneously rolling and expanding two trapezoid-cross-section flange ring forge pieces is high in production efficiency, energy-saving, environmental-friendly and capable of improving utilization rate of raw materials and quality of products.

The invention discloses an extrusion forming mould for annular ribs of magnesium alloy shell parts. The extrusion forming mould mainly comprises an upper mould plate, a mandrel, a split male mould pull rod, split male moulds, tension springs, a male mould sliding guide rail, a split male mould sliding bottom plate, a supporting plate and a cylindrical female mould, wherein the head part of the mandrel is conical, a center hole is formed in the axial direction of the mandrel, one end of the split male mould pull rod is inserted in the center hole, the other end of the split male mould pull rod is fixed on the split male mould sliding bottom plate, the at least two split male moulds are symmetrically arranged around the split male mould pull rod, are fixedly connected with the split male mould pull rod through the tension springs and are arranged in a radial sliding groove of the split male mould sliding bottom plate through the male mould sliding guide rail, a wedge-shaped inclined plane adapting to the conical head part of the mandrel is arranged at the inner side of each split male mould, an arc-shaped extruding bulge is arranged at the arc-shaped wall surface of the outer side of each split male mould, and the arc length of each extruding bulge is more than the distance between each two adjacent extruding bulges. According to the extrusion forming mould, all the split male moulds do radial movement by virtue of the axial movement of the mandrel, metal flows in the radial direction, and thus the annular ribs are generated.

The invention discloses a heat simulation method for differential temperature rolling, and belongs to the technical field of metal material technology research. On the basis of Gleeble thermal simulated test machine, an air injection cooling device is additionally arranged inside a working cavity of the thermal simulated test machine. The method comprises the experimental steps of manufacturing, sample grinding, thermocouple welding, differential temperature rolling, quenching treatment and experimental analysis. The heating characteristics of the Gleeble thermal simulated test machine, the conventional sample size is changed, an auxiliary cooling tool is used, and the heat simulation method is used for differential temperature rolling technology research, and convenient and fast research means is provided for mature application of the differential temperature rolling technology.

The invention discloses a thermal medium bulging test machine, which mainly consists of a base, a vertical column, a middle beam, an upper beam, a blank cylinder, a heating furnace, a high pressure medium generation device, a bulging device, a bulging height measuring device, a pressure measuring device, an anti-oxidation device and a cooling device, wherein the vertical column is arranged on the base; the middle beam is arranged on the vertical column; the upper beam is arranged on the vertical column; the blank cylinder is arranged on the upper beam; the heating furnace is arranged between the middle beam and the upper beam; the high pressure medium generation device is arranged between the base and the middle beam; the bulging device is arranged in the heating furnace; the bulging height measuring device is arranged on the upper beam; the pressure measuring device is arranged at the outlet end of the high pressure medium device; the anti-oxidation device is connected with the side wall of the heating furnace through a pipeline; and the cooling device is connected with the outlet end of the high pressure medium device and an ejector rod through the pipeline. The base, the middle beam and the upper beam are integrally connected through bolts; the heating furnace is welded and fixed on the middle beam; a cooling separator is fixed on the blank cylinder through the bolts; the ejector rod is fixed on the cooling separator through the bolts; and a cooling water jacket is fixed on the middle beam through the bolts.

The invention discloses a soil and structure contact surface testing machine. The soil and structure contact surface testing machine comprises a body frame, a structure panel, an X-direction motion system, a Y-direction motion system, a Z-direction motion system, a hydraulic loading and control system, a data acquisition system, a confining pressure chamber system, a temperature control system andthe like. The soil and structure contact surface testing machine is specially designed for researching the problem of the soil and structure contact surfaces, and can complete the research on the problem of the contact surfaces between various soil types, such as clay, fine-grained soil and coarse-grained soil and all kinds of structural panels under various saturation or non-saturation temperature field conditions. The normal stress is directly applied to the contact surfaces during the test. The concept is clear and the stress state is clear, the uniform strain of the soil can be ensured, the strain localization phenomenon is eliminated, the constant areas of the contact surfaces are ensured, and it is ensured that the results are true and reliable.

The invention provides a shoe with a curve L-shaped mass block piezoelectric power generation device used, and belongs to the technical field of vibration energy recovery power generation. According to the shoe, the curve L-shaped mass block piezoelectric power generation device is installed in the shoe, the structure of a curve L-shaped mass block homogenizes strain distribution on a cantilever beam to some extent, and the energy density of a piezoelectric energy recovery device is improved, so that the recovery efficiency of vibration energy is improved; meanwhile, a rectifying circuit and a capacitor or a battery are arranged in the mass block, therefore, the whole device is compact in structure, the reliability is improved, and stored electric energy can be used for charging electronic equipment through conversion.

The invention discloses a water pollution monitoring biosensor, a monitoring system and a monitoring method, wherein the biosensor comprises an aquatic organism which is a living bivalve organism, anoptical grating fixing structure, and an optical grating; the optical grating fixing structure comprises a first fixing base, a second fixing base and an elastic beam piece, the elastic beam piece isof an arch structure, a first fixing part and a second fixing part of the elastic beam piece are mounted on the first fixing base and the second fixing base respectively, and a bent part in the middleof the elastic beam piece is located between the two fixing bases; the two fixed bases are respectively fixed on the surfaces of two shells of the aquatic organism; the optical grating is a fiber Bragg grating and is adhered to the outer side of the bent part of the optical grating fixing structure; opening and closing of the two shells of the aquatic organism drive the bent part to expand or contract through the two fixing bases, then the optical grating is driven to regularly expand or contract, and signal changes are generated.

In a localized torsional severe plastic deformation method for conical tube metal, a desired region of a conical tube metal can be subjected to severe plastic deformation using molds in which roughness is formed at predetermined regions. The method includes roughening a predetermined region of each of the molds; sticking the conical tube metal only to the roughened regions of the molds; moving the lower mold toward the upper mold to apply a load to the conical tube metal; and rotating the molds to apply severe plastic deformation to the conical tube metal only at the regions stuck to the roughened regions of the molds.

The invention provides a preparation method and a preparation device of a flexible electronic device. The preparation method comprises the following steps: uniformly stretching a flexible substrate along the outer contour direction of the flexible substrate; after the flexible substrate is stretched in place, under the stretching state of the flexible substrate, coating the sensitive unit materials on the surface of the flexible substrate in an array mode; and after the sensitive unit material on the flexible substrate is cured, releasing the flexible substrate to enable the flexible substrate to retract to the initial size. According to the preparation method, the flexible substrate is uniformly stretched along the outer contour direction of the flexible substrate, so that the flexible substrate is uniformly deformed outwards along the outer contour direction, the periphery of the flexible substrate is uniformly retracted after the flexible substrate is retracted, the sensitive unit coated on the surface of the flexible substrate is uniformly retracted along with the flexible substrate, the sensitive unit is uniformly retracted, and the strain of the sensitive unit in each direction is uniform; and after retraction, the sensitive unit does not generate cracks or wrinkles.

A method for operating a ride height control device, which includes at least one air spring, of a vehicle body of a vehicle, by providing a setpoint ride height predefined for a journey, and by setting, at the beginning, during or immediately before the end of the journey, the ride height of the vehicle body at least once to a ride height which deviates from the setpoint ride height predefined for the journey.