6results about How to "Improve longitudinal strength" patented technology

The invention relates to a method for improving the binding force of a friction stir additive manufacturing structure layer. The method comprises the steps that oxide skin on the surfaces of a raw material bar and an additive substrate is removed; the additive substrate with the oxide skin removed is fixed; feeding the raw material bar towards the additive substrate; the raw material bar with the oxide skin removed makes contact with the additive base plate in the rotating advancing process and rubs against the additive base plate, and the end of the raw material bar is heated to be softened and evenly smeared on the surface of the additive base plate with the oxide skin removed; and after the raw material bar advances to the designated position, the raw material bar is controlled to be lifted by the height of one layer, the raw material bar is fed, and next-layer additive machining continues to be conducted on the additive base plate. According to the method, the problem of additive flowing caused by interlayer oxide inclusion of materials in the additive manufacturing process is solved, in addition, the metallurgical bonding effect between layers of the stirring friction additive manufacturing component is improved by removing oxide skin on the additive raw materials and the base plate, the longitudinal strength of the component is improved, and the service life of the component is prolonged. And the problem of longitudinal brittle fracture of the component caused by oxide inclusion is solved.

The application provides a planet rover transfer device and a transfer characteristic test evaluation method, and belongs to the technical field of planet rover transfer and test. The planet rover transfer release device comprises a slow-release rope, a hanger, a swing rod and an attitude control rope. One end of the swing rod is rotationally connected to a side wall of a lander. The other end of the swing rod is provided with an attitude control hinge. One end of the hanger is connected to the attitude control hinge, and the other end of the hanger is connected to a rover. One end of the attitude control rope is connected to the lander, and the other end of the attitude control rope passes through the attitude control hinge. The slow-release rope is wound on a slow-release rope wheel. The slow-release rope wheel is arranged on the side wall of the lander. The slow-release rope is connected to the hanger. The device is mainly used for planet rover transfer device and transfer characteristic test.

The present invention belongs to the field of valve technology, and discloses a self-sealing anti-leakage valve, including a valve body, a connecting component; a buffer component; an adjusting component; a cleaning component and a cut-off component. The present invention is provided with a cut-off component with auxiliary movement. When the piston block reaches the gap of the partition and then continuously moves downward, it will encounter the pressure of the water flow in the right chamber, forming a water hammer effect. At this time, the three metal rods will contact the groove ring and move clockwise downward in the groove. The L-shaped rod will be pushed out under the clockwise push of the cross plate and the elliptical groove. The shape of the L-shaped rod is a conical cross-section surface. When the L-shaped rod is continuously extended to the bottom surface of the partition, it will provide an additional downward extension force to the piston block. The auxiliary piston block can completely fit and close the gap at the partition, solving the problem that the water flow will produce a certain impact force on the opening and closing mechanism during the gradual closing process of the valve opening and closing parts, resulting in water hammer phenomenon and leakage.

The present application relates to the technical field of high polymer material silicone rubber, and particularly relates to a kind of flame-retardant antistatic high-temperature resistant vulcanized pipe and a preparation method thereof.The present application effectively solves the poor compatibility and performance conflict problem often occurred when realizing high flame-retardant and antistatic function of traditional silicone rubber pipe material by constructing a unique "microscopic island structure".In the preparation process, vinyl MQ silicone resin as a key "interface bridging" component can be preferentially adsorbed on the interface of different polar rubbers and wrapped modified flame retardant to form a "core-shell" micro area, which not only prevents the interference of high-filled flame retardant on the conductive network, but also significantly enhances the interfacial adhesion between methyl silicone rubber and phenyl silicone rubber two phases;At the same time, the assistant crosslinking agent triallyl isocyanurate participates in grafting reaction during vulcanization process, and establishes a stable chemical bond bridge between different rubber phases, which fundamentally avoids the delamination phenomenon of the blending system.

This invention discloses an integrated 3D printing method based on an integrated lens array, belonging to the fields of integrated imaging, light field 3D imaging, and additive manufacturing technology. The method first acquires an integrated image of a 3D model; then, it scales the integrated image to obtain an integrated image suitable for 3D projection onto the integrated lens array; next, it projects the integrated image onto the integrated lens array using a main-view lens or lens group, generating a 3D real image projection of the object; then, it uses a transparent container with light-filtering and anti-reflection properties to hold liquid photosensitive resin; finally, it places the container holding the liquid photosensitive resin in the 3D real image projection area of ​​the object, completely enveloping the projection, and waits for the photocuring reaction to complete to obtain the 3D printed product. The method described in this invention is simple to implement, requires no complex mechanical structure, is easy to operate, and has strong practicality and scalability.

The application discloses a degradable jute fiber non-woven fabric for manufacturing high-grade hand shopping bags, which is made of jute fibers, bi-component sheath-core structure polylactic acid fibers and cotton fibers, and the weight parts of the jute fibers, the bi-component sheath-core structure polylactic acid fibers and the cotton fibers are 40-60, 30-33 and 36-40 respectively. The application further discloses a method for producing the jute fiber non-woven fabric. The method can overcome the defects of the prior art and process the non-woven fabric which can be used for manufacturing high-grade hand shopping bags.