102results about How to "Avoid unstable performance" patented technology

The invention provides a laser and grating coupler packaging structure and method. The packaging structure comprises a laser unit, a collimating lens, an isolator and a reflection prism, wherein the laser unit, the collimating lens, the isolator and the reflection prism are mounted on a silicon-based photoelectric chip. The silicon-based photoelectric chip comprises a first electrode, first and second marks, a grating coupler and a waveguide layer which are all arranged at the surface; the laser unit comprises a transitional substrate and a laser; the collimating lens comprises a first lens and a second lens, the first lens is vertical to the surface, the second lens is arranged at the surface at the position of the second mark, and thus, the grating coupler is placed in the central area of the main axis of the optical path of the second lens; and the isolator is mounted at the surface between the first lens and the second lens, so that diverging light output by the laser is collimated by the first lens, then reflected to the reflection prism through the isolator, deflected by the reflection prism for certain angle, and gathered by the second lens, and the gathering point is placed at the surface of the grating coupler. Thus, technical problems in accurate in-place packaging are solved, convenience is provided for preparation, and the yield rate is improved.

The invention relates to a method for producing high-strength finishing rolling threaded steel bar by an online hardening and tempering technology. The used technical proposal comprises the steps that: a steel blank is heated to 1150-1200 DEG C, the blank is rolled to the shape of the required finishing rolling threaded steel bar, the temperature of final rolling is controlled in a range from 880to 1050 DEG C, rolling exit velocity is controlled in 20-30 meter / minute, the steel bar enters into a cooling device in 5 seconds from the exit of a rolling machine so as to be quenched and then be cooled at 200-400 DEG C / second, the steel bar has the surface temperature of 50-80 DEG C after getting out of the cooling device, the quenched steel bar is conveyed to an annealing line via a transferring roller channel and a shifting platform for the annealing, the steel bar passes through an induction heater at the speed of 10-15 meter / minute, the annealing temperature is controlled in a range from 520-680 DEG C, and then blanking and cutting are implemented. In the invention, direct quenching is carried out after hot rolling, so that the steel bar can be completely quenched into a martensitic structure and is then directly annealed online to remarkably lower the production cost and dramatically improve toughness index of the steel bar.

The invention relates to an adhesive for grinding wheel meshes and a preparation method of the adhesive. The adhesive comprises 80-110 parts of thermoplastic phenolic resin, 1-6 parts of curing agent, 20-40 parts of thermosetting phenol resin liquid, 60-140 parts of alcohol, 0.5-2 parts of flexibilizer, 0.5-2 parts of coupling agent and 0.5-2 parts of plasticizer. The preparation method includes adding the alcohol into a stirrer, adding the thermoplastic phenolic resin whiling stirring, stirring for 3-4 hours, adding the thermosetting phenol resin liquid containing the coupling agent, the plasticizer and the flexibilizer containing the alcohol after phenolic resin blocks are totally dissolved, stirring for 3-4 hours prior to adding the curing agent, and continue stirring for 4-6 hours to obtain the adhesive. The adhesive prepared by the method can be ready-to-use and ready-to-prepare and is good in stability pollution and mainly used for impregnation of the grinding wheel meshes, pollution and waste are reduced, brittleness of the grinding wheel mashes, strength and adhesive performance are improved, and accordingly wear resistance of grinding wheels is improved, highest rotation speed of the grinding wheel is increased, and service life of the grinding wheel is improved.