266results about How to "Control cooling rate" patented technology

A method for forming an optical fiber includes drawing the optical fiber from a glass supply and treating the fiber by maintaining the optical fiber within a treatment temperature range for a treatment time. Preferably also, the fiber is cooled at a specified cooling rate. The optical fiber treatment reduces the tendency of the optical fiber to increase in attenuation due to Rayleigh scattering, and/or over time following formation of the optical fiber due to heat aging. Apparatus are also provided.

The present invention provides a friction stir welding apparatus and associated thermal management systems and methods for joining one or more similar or dissimilar materials forming a workpiece along a joint to be welded. The friction stir welding apparatus includes a pin tool apparatus selectively disposed adjacent to and in direct contact with a first surface of the workpiece along the joint to be welded and a heating member disposed adjacent to a second surface of the workpiece along the joint to be welded, the heating member operable for controllably heating at least a portion of the workpiece adjacent to the joint to be welded. The friction stir welding apparatus also includes an annular spindle having an interior portion and an axis, the interior portion of the annular spindle at least partially defining one or more cooling channels, the one or more cooling channels operable for containing a cooling fluid. The friction stir welding apparatus further includes a shoulder disposed adjacent to the annular spindle and substantially aligned with the axis of the annular spindle and a pin tool disposed adjacent to the shoulder and substantially aligned with the axis of the annular spindle. The cooling fluid is operable for cooling at least one of the shoulder and the pin tool.

The invention belongs to the technical field of electric appliances and electric engineering, and relates to a multifunctional modularized lithium electric cooker. An embedded handle is embedded in an upper cover with a heat-preserving layer, the middle of the upper cover with the heat-preserving layer is provided with an air outlet hole, a lateral thermoelectric film is attached to the outer side of a barrel-shaped outer container, and a barrel-shaped inner container is arranged on the inner side of the barrel-shaped outer container; an inner container upper cover covers the top of the barrel-shaped inner container, and the lower end of the barrel-shaped inner container is provided with a strainer; the barrel-shaped outer container is arranged on an inner and outer container supporting frame, the inner and outer container supporting frame is disposed on a bottom support, the center of the bottom support is provided with a bottom cooling air hole, a bottom thermoelectric film is attached to the surface of the bottom support, and the lower portion of the bottom support is provided with a lithium battery; a power supply cover plate is disposed on the outer side of the lithium battery; the inner side of the bottom of a shell is provided with a fan, and a bottom heat-preserving pad is arranged on the outer side of the bottom of the shell; one side of the barrel-shaped outer container is provided with a temperature sensor connected with a temperature display and control unit, and the shell is provided with the temperature display and control unit and a clock displaying, timing and setting unit. The multifunctional modularized lithium electric cooker is simple in structure, multifunctional, convenient to carry, safe to use, convenient to repair and maintain, high in utilization rate and good in heat preservation.

The invention belongs to the metallurgy technical field and in particular relates to an intermediate blank cooling system and cooling control technology. The intermediate blank cooling system is characterized in that an aerial fog cooling device body is arranged between a rough mill and a finishing mill. The aerial fog cooling device body is composed of an upper cooling header and a lower coolingheader, and an aerial fog nozzle and a compression air pipe are arranged on the cooling water pipe of the upper cooling header and the lower cooling header; and the on/off control valve and flow control valve of the cooling water pipe and the compression air pipe are connected with a control valve station. The intermediate blank aerial fog cooling technology is controlled by the aerial fog controltechnology sprayed on the cooling header arranged near roller ways at the front and rear of the mills. The invention has fast cooling speed without changing metal performance, water yield regulatingrange is wide and the water yield can be regulated continuously, the cooling speed of the intermediate blank can be precisely controlled, and the invention can be widely applicable to middle and thickplate production line.

A method for forming an optical fiber includes drawing the optical fiber from a glass supply and treating the fiber by maintaining the optical fiber within a treatment temperature range for a treatment time. Preferably also, the fiber is cooled at a specified cooling rate. The optical fiber treatment reduces the tendency of the optical fiber to increase in attenuation due to Rayleigh scattering, and/or over time following formation of the optical fiber due to heat aging. Apparatus are also provided.

The invention discloses a compound die device used in a hot pressing fuel battery film electrode, comprising a top pressing board, a top die, a positioning frame, a bottom die, a bottom pressing board, a plurality of positioning guide pillars and catapult springs; wherein the top die comprises a top die head and a top die base. A positioning groove for diffusion layers is arranged at the center ofthe contact surface between the top die head and the film electrode, so as to position the first diffusion layer of the film electrode. The bottom die comprises a bottom die head and a bottom die base, which has the same structure as the top die; wherein the bottom die head is used to position the second diffusion layer of the film electrode. The positioning frame is arranged between the top dieand the bottom die, a center bore in the positioning frame is used to position an ion exchange membrane. At least two positioning guide pillars are arranged on the bottom pressing board, aligning andpositioning the top pressing board, the top die, the positioning frame, the bottom die and the bottom pressing board in order. The catapult springs are respectively arranged between the pressing boards and the top, the bottom die, as well as between the top and the bottom die. The invention has the advantages of easy positioning and alignment, convenient, fast and energy-saving hot pressed film electrode.

The invention relates to an easy-welding high-strength large-thickness steel plate preheating-free gas shielded welding process which mainly comprises the following contents that: the large-thickness easy-welding 700MPa-level high-strength steel plate with the thickness of 40-80mm is matched with a high-strength high-toughness welding wire with high deoxidation element content, a 80 percent Ar+20 percent CO2 active mixed gas shielded semi-automatic or automatic welding method is adopted, due to the preheating-free treatment before welding and heating-free treatment after welding, the welding process parameters are strictly controlled, the welding sequence is reasonably arranged, the asbestos cloth coated weldment is used for heat insulation, the defect-free excellent-performance welding joint is obtained, the tensile strength of the joint is not lower than the base metal standard requirement due to mechanical performance detection, the welding line and heat affected zone are good in texture, low-temperature charpy impact absorption work (KV2) is high in surplus amount, and the application environments of the low-temperature environment can be completely met. According to the method, the production process is reduced, the labor conditions of workers are improved, the production cost is saved, and the production efficiency is improved.

The invention discloses a plate warm electro-hydraulic high-speed impact-quasi static hydraulic composite forming device and a plate forming method achieved by adopting the device and relates to the field of metal material processing forming to solve the problems that forming of plates and complex parts is difficult, film attaching is poor, and deformation is not even. A vacuum pump is used for pumping out gas in a female die cavity; a fluid injection device is adopted for injecting high-temperature-resisting liquid to a liquid chamber; a heating device is used for heating the female die cavity, the high-temperature-resisting liquid in the liquid chamber is heated, preheating on a to-be-processed plate is completed, and heat preservation is conducted on the to-be-processed plate; an electromagnetic forming system is used for conducting discharging forming on the to-be-processed plate; high-pressure warm liquid is slowly injected into the liquid chamber under the quasi static condition, and quasi static hydraulic forming is conducted on the to-be-processed plate; and the high-pressure warm liquid in the liquid chamber is cooled to the room temperature within a period of time, waste liquid is recycled, an electro-hydraulic forming die is opened, and the to-be-processed plate is taken away. The device and the method are used for forming plates.

The invention relates to EH47 crack arrest steel for a large container ship. The chemical components of a steel plate comprise, by mass, 0.03%-0.06% of C, 0.15%-0.50% of Si, 1.50%-2.00% of Mn, smallerthan or equal to 0.008% of P, smaller than or equal to 0.0050% of S, 0.050%-0.080% of Nb, 0.020%-0.050% of V, 0.008%-0.020% of Ti, 0.80%-1.30% of Ni, 0.10%-0.30% of Cr and 0.10%-0.30% of Cu. The manufacture technology process of the steel plate comprises the steps of smelting, continuous casting, reheating, TMCP rolling and controlled cooling. The steel plate obtains fine and uniform acicular ferrite in the whole thickness, the strength is moderate, the toughness is excellent, the good brittle fracture resistance is achieved, namely, the CTOD characteristic value delta is larger than or equal to 0.15 mm at -60 DEG C, and the crack arrest performance is excellent, namely, Kca is larger than or equal to 6,500 N/mm<3/2>.