233results about How to "Eliminate stomata" patented technology

The invention discloses a rapid electric arc fused deposition and laser shock forging combined part forming method. The rapid electric arc fused deposition and laser shock forging combined part forming method comprises the steps that firstly, a pre-formed part model is divided into one or several simple forming units through a simulation system, and the forming sequence of the forming units is determined; secondly, numerical control equipment controls an electric arc welding gun to carry out fused deposition forming layer by layer on a machined material on a machining base plate of a moving platform, and a cladding layer is formed; and thirdly, a computer controls the moving platform to move, a fusion region keeps a horizontal state all the time, and meanwhile a computer controls pulse laser beams to carry out synchronous shock forging on the electric arc fused deposition metal region at the plastic deformation temperature. The invention further provides a rapid electric arc fused deposition and laser shock forging combined part forming device. The rapid electric arc fused deposition and laser shock forging combined part forming method and device have the beneficial effects that a formed structure is good in structure stability, the yield is high and safety and reliability are achieved.

A current collector and method of forming the same in which a slurry is prepared that contains electrically conductive particles having surface deposits of a metallic oxide on a metal or metal alloy conductor that has a lower weight percentage of the electrically conductive particles than the metal or metal alloy. The slurry is applied to a structure that contains an electrolyte and electrode layers. The resultant coated form is then fired to partly sinter the electrically conductive particles and thereby to obtain porous current collector layers affixed to the electrode layers. The current collector of the present invention is between about 5 microns and about 100 microns thick and preferably has a porosity of between about 10 percent and about 70 percent with pores having a pore size of between about 0.1 microns and about 20 microns.

A welding method and apparatus for welding workpieces together by conducting a forward hybrid welding process on a joint region that includes a weld seam defined by and between faying surfaces of the workpieces, and then conducting an aft hybrid welding process on the joint region. The forward hybrid welding process simultaneously causes a forward laser beam and a forward electric arc to travel along the joint region, which in combination penetrates the weld seam and forms a weld pool that solidifies to form a weldment. The aft hybrid welding process utilizes an aft electric arc and an aft laser beam to produce a second weld pool that remelts and mixes with the weldment. On cooling, a weld joint is formed that is capable of deeply penetrating the weld seam of the joint region.

The invention discloses a technological method for composite asynchronous polishing of ceramics using picosecond-nanosecond laser. The technological method comprises the steps of firstly, irradiatingthe ceramic surface to be machined through picosecond laser along a certain scanning trace, and removing micro protrusions of the ceramic surface, so that the preliminary flattening is achieved; meanwhile, generating a large number of micro-nano particles by using a removal mechanism for the electronic state of ceramic materials through picosecond laser, wherein the micro-nano particles exist at adjacent space areas of the irradiated ceramic surface; starting a low power nanosecond laser according to the preset time for tracing the scanning path of the picosecond laser, and irradiating and fusing the micro-nano particles uniformly distributed on the ceramic surface; and finally forming a compact and smooth fine-grain melted layer so that the polishing effect is achieved. According to the technological method, original pore cracks of the ceramic materials are repaired, and the shortcomings that a heat affected zone generated by traditional laser polishing is large and the material surface is liable to generate micro-cracks and pores are overcome; and low removal amount, high efficiency and accuracy and submicron-level fine polishing of the ceramic materials is achieved.