3results about How to "Control cooling rate" patented technology

The application discloses a method for integrally injection-molding a metal small shaft and a composite small blade, extending an easy-to-break tail section of the same material from a non-injection-molding end of the metal small shaft, processing a notch and a plane on the surface of the injection-molding end of the metal small shaft, placing a tooling on the outside of a mold cavity of an injection-molding mold and corresponding to the position of the metal small shaft, adjusting the clamping position of the metal small shaft on the tooling, starting injection molding, keeping the tooling clamping the tail section of the metal small shaft during the injection molding, and removing the tail section after the injection molding. The method accurately integrally injection-molds one end of the metal small shaft and an end of the composite small blade, ensures that the length direction of the metal small shaft exposed from the end of the composite small blade meets the specified length, and ensures that the metal small shaft does not rotate in the composite small blade or is not separated from the composite small blade due to loosening of the joint position during use, so that the metal small shaft and the composite small blade form an integrated louver blade.

The application belongs to the technical field of laser additive manufacturing, and particularly relates to an array type laser additive manufacturing method and device, which comprises the following steps: S1, digital model import and layering slicing; S2, scanning path planning and filling setting; S3, array type laser synchronous output control; S4, powder flow and powder feeding path control; S5, according to the width of the additive, the width of single track cladding is adjusted in real time; S6, according to the slice layer material of the additive, the matching material is delivered; S7, S1-S6 are repeated, and layer-by-layer accumulation is performed until the part manufacturing is completed. The application can accurately control the grain size, improve the material microstructure, and improve the mechanical properties; the generation of defects such as thermal cracks and pores is reduced, the stability of the deposition process is ensured; the interlayer bonding is optimized, the quality of multi-layer deposition is ensured; the residual stress is reduced, the size precision, shape stability and fatigue performance of the part are improved; the post-processing requirement is reduced, and the processing cost is reduced.

The invention discloses a liquid cooling driving pump body investment casting process which comprises the following steps: firstly, according to the size and the shape of a pump body, manufacturing a mold with a cavity consistent with the pump body and a loose piece for forming a complex inner cavity structure of the pump body, then injecting wax, molding a wax mold in the mold cavity by adopting a one-time mold splitting molding process, according to the pump body complex inner cavity wax mold, loose pieces are mutually positioned, combined and formed, then wax injection mold splitting is carried out to obtain a wax body, the wax body is connected to a mold head through a pouring gate system to form a tree group, then shell making and dewaxing are carried out on the tree group to form a mold shell, and then roasting, smelting pouring and post-treatment are carried out on the mold shell to form a casting. And the casting is further machined through overhauling, heat treatment, shaping and finish machining, and finally the qualified pump body is obtained if the casting is detected to be correct. Through one-time mold splitting of the wax piece with the complex structure in the inner cavity of the pump body, the mold splitting efficiency is improved, the cost is reduced, meanwhile, the pump body casting is corrected by adopting a one-time composite sizing mold after being subjected to smelting pouring, orderly cooling solidification and heat treatment, and the leakage risk of the pump body casting is greatly reduced.