57results about How to "Improve mechanical bonding" patented technology

A conditioning insert of a friction device includes a body having a conditioning surface configured to engage a wheel, opposite first and second sides intersecting the conditioning surface, and opposite third and fourth sides intersecting the conditioning surface. Each of the first and second sides extend from the third side to the fourth side. The body includes one or more of (a) a recess extending into one or more of the first side, the second side, the third side, or the fourth side and is configured to receive friction material of the friction device and / or (b) a protrusion extending out of the first side, the second side, the third side, or the fourth side and into the friction material of the friction device.

The invention discloses a preparation method for a silicon carbide fiber bundle enhanced aluminum matrix composite. Quartz fiber bundles are adopted to be woven into fiber cloths, the fiber cloths and graphite powder are pressed in a layered mode to form silicon carbide fiber cloths, aluminum or an aluminum alloy foil and the silicon carbide fiber cloths are subjected to layered alternate overlapping, a prefab before composite pressing and sintering is obtained, the prefab is subjected to pressing, sintering and cooling, and a filament silicon carbide fiber bundle net-shaped enhanced aluminum matrix composite is obtained. The volume fraction of silicon carbide fiber in the prepared silicon carbide fiber bundle net-shaped enhanced aluminum matrix composite is 50-60%. The compactness of the composite is 95.5-98.7%, the density is 2.80-2.90 g / cm<3>, the anti-bending elasticity modulus is 109-136 Gpa, the heat conductivity of the composite is high and not less than 170 W / (m.K), and the coefficient of thermal expansion is (8.5-12.5)x10<-6> / K and adjustable. Compared with a current used aluminum silicon carbide composite, the heat conductivity is high, the volume fraction of an enhancesome SiC is large, and the cost of the silicon carbide fiber bundle enhanced aluminum matrix composite is lower than the cost of an aluminum diamond composite.

The invention relates to the technical field of tie rod forming. The forming method of the composite pull rod comprises step A, preparation of winding forming mold and positioning of metal joints; design and preparation of winding forming mold, and engraved lines are designed on the outer surface of the winding forming mold in the circumferential direction; step B, winding of dry fiber yarn; Fiber winding equipment is used to wind according to the winding law; step C, resin infusion molding of the tie rod; after the tie rod is wound and formed with dry fiber yarn, it is placed in the resin infusion mold together with the winding molding mold, and then the resin material is poured, and the resin infusion mold is placed Heating and curing in an oven, curing and demoulding to obtain a semi-finished product; step D, processing the tie rod; processing the length of the tie rod and internal thread along the position of the metal joint of the tie rod. The composite pull rod includes metal joints, dry fiber yarns, and a cured integrally formed structure of resin materials; it solves the problems of existing tie rods that are prone to failure connection at the joint position and insufficient structural strength.