4results about How to "Precise process control" patented technology

This invention relates to the field of polymer materials technology, specifically to a method for preparing and applying a rigid polyimide foam reinforced with aluminum honeycomb. The method for preparing the rigid polyimide foam reinforced with aluminum honeycomb provided by this invention includes steps such as surface pretreatment of the aluminum honeycomb core material and fixing the pretreated aluminum honeycomb core material into a molding die. The rigid polyimide foam material reinforced with aluminum honeycomb obtained by this invention not only possesses high specific strength and high specific stiffness, but also inherits the excellent properties of polyimide foam such as high temperature resistance, flame retardancy, low smoke, and thermal insulation. The introduction of the aluminum honeycomb skeleton also improves the material's impact resistance and dimensional stability, making it an ideal multifunctional integrated lightweight structural material with promising application prospects.

The present application relates to a kind of lime-soil compaction pile construction system for collapsible loess area, before construction, good technology, material, equipment and site preparation, such as familiar drawing, prepare soil and lime, debug hole and ramming equipment, level site and surveying and setting out etc..During construction, first carry out test pile to determine parameters, large-scale hole formation follows specific sequence and strictly controls pile diameter, perpendicularity etc.;Pile formation first clean bottom ram, then layered packing ramming, accurate operation by control system;After pile formation, do well maintenance.Quality detection uses low-strain dynamic penetration method to detect pile integrity, plate load test to detect composite foundation bearing capacity.The method is applied to a certain commercial complex project, construction is smooth, hole formation and pile formation quality meet the standards, efficiency is improved, construction period is shortened.

The utility model belongs to the technical field of casting powder liquefaction pouring in a continuous casting steelmaking link, and relates to an on-line treatment device for directly heating and melting continuous casting powder, which comprises a high-temperature melting chamber, a plasma spray gun, a casting powder bin, a replaceable flame blocking base plate and a fan. The high-temperature melting chamber is a hollow cavity, and a gradually-expanding pouring outlet is formed in the bottom of the high-temperature melting chamber. And the plasma spray gun is horizontally mounted on one side wall. The casting powder bin is arranged at the top, and a flow adjusting valve is arranged at the bottom. The replaceable flame blocking base plate is vertically inserted through the top wide seam, the plate face is perpendicular to the jet flow direction, and the lower portion is a U-shaped flow guide face. The fan is connected to the upper right portion of the pouring outlet so as to maintain micro-negative pressure. The plasma jet flow is adopted to directly impact and heat solid slag powder, U-shaped baffle flow guide, micro-negative pressure drainage and divergent outlet flow stabilization are matched, rapid and uniform melting and accurate and stable pouring of casting powder are achieved, equipment is compact, control is sensitive, and the device is particularly suitable for high-quality steel continuous casting production.

The invention relates to a local strengthening stamping method for an automobile horn mesh enclosure, belongs to the technical field of metal stamping, and aims to solve the technical problems that in the stamping forming process of an existing metal horn mesh enclosure, a complex curved surface area is prone to cracking and mesh deformation, and the strength of an edge mounting part is insufficient. The invention provides a composite stamping process comprising multi-station progressive forming and local pressurization strengthening. The method comprises the following steps: carrying out annealing softening treatment on a metal plate pre-etched with meshes; carrying out integral preforming through a first station; in the second station, a die with a local strengthening male die is used for conducting local pressurization strengthening stamping on the corner curved surface, the edge turnup and the installation buckle position of the mesh enclosure, and material flowing and thickness distribution of a strengthening area are controlled; and finally finishing and stamping. The forming quality of the metal horn mesh enclosure in a complex shape can be effectively improved, the structural strength of key parts is enhanced, it is guaranteed that meshes are uniform and transparent, the product yield is remarkably increased, and the service life is remarkably prolonged.