35results about How to "Control temperature gradient" patented technology

The invention discloses a high-energy beam additive manufacturing method and equipment with high powder raw material utilization rate. The method comprises the following step of according to the outline shape of a to-be-molded metal component slice, determining the internal structure of a molding cylinder, wherein metal powder of each powder paving layer is only positioned in an area corresponding to the outline shape of the to-be-molded metal component slice, so that the using amount of the metal powder is greatly reduced, and the function and effect of manufacturing the high-energy beam increasing material is improved. The equipment comprises one or more molding cylinders, wherein the internal structures of the molding cylinders are matched with the outline shape of the to-be-molded metal component slice. Due to the fact that an insert and a special-shaped substrate which adapts to the outline shape of the metal component slice are used, rebuilding of the molding cylinders for different metal component structure characteristics is realized, and the defect that redundant powder is too much in the traditional high-energy beam increasing material manufacturing process is successfully avoided. High-quality and High-effective molding of various metal components with complex structures and different sizes can be finished under the condition of high powder utilization rate.

The invention discloses a device and method for testing deformation and water transfer characteristics of a soil body under a temperature gradient effect. The device comprises a sample chamber, a temperature gradient control device and a temperature and water content collecting device, wherein the sample chamber comprises an dual-layer hollow organic glass interlayer sleeve and a cover plate; a high-temperature control device and a low-temperature control device are arranged at the upper end and the lower end of the temperature gradient control device respectively, and the temperature gradient control device comprises a constant-temperature water bath, a heating chamber inside the sample chamber, heat transfer plates at two ends of a sample, and a full-closed circulating pipeline. The device for testing the water and temperature of the soil body can be used for testing the water content and the temperature of the soil body synchronously in real time. The device provided by the invention is convenient, simple and light in design, convenient to operate, good in integration performance, and high in testing precision.

The invention discloses a soil body temperature gradient and moisture movement test device. The device comprises a sample chamber, a temperature gradient control device and a temperature and moisture content acquisition device. The sample chamber is composed of an organic glass double-layer hollow interlayer sleeve and a cover plate. The upper end and the lower end of the temperature gradient control device are respectively provided with a high temperature control device and a low temperature control device, and the temperature gradient control device comprises a constant temperature water bath box, a heating chamber placed inside the sample chamber, heat transfer plates arranged on both ends of a sample and a full-closed circulating pipeline. By using the soil body moisture and temperature test device, the moisture content and the temperature of a soil body are synchronously real-timely measured. The temperature gradient and moisture movement test device is simple, light and handy in design, convenient to operate, good in integration performance and high in test precision.

The invention discloses a device and a method for detecting the thermal migration performance of interconnected welding spots. The device sequentially comprises a cooling mechanism, an upper heat conduction plate, a lower heat conduction plate and a heating plate from top to bottom, namely, the cooling mechanism is arranged at the upper part of the upper heat conduction plate and the lower heat conduction plate is arranged at the upper part of the heating plate; and a sample is arranged in a space between the upper heat conduction plate and the lower heat conduction plate. A temperature control device of the heating plate is adjusted to obtain the temperature required by the heating plate; a rotating speed adjusting device of a cooling fan is adjusted to adjust the air volume of the fan so as to change the temperature of the hot and cold ends of the sample, and the required temperature gradient can be obtained according to the height of the welding spot. The device and the method have high safety reliability, the structure is simple and can be operated easily, the cost is low, popularization can be realized easily, electromigration interference can be effectively avoided, and the temperature gradient can be effectively controlled by control of the temperature difference of the cold and hot ends.

The invention provides a single crystal growth device and a method. The temperature gradient in the crucible can be accurately and actively controlled, and by strengthening the structure of the vacuum chamber, the deformation after the long-time use can be prevented, and therefore the residual stress of the single crystal in the length direction during the single crystal growth can be reduced to the greatest extent, the cracks or the breaking can be prevented, and the single crystal growth diameter can be increased. The single crystal growth device comprises a crucible 30 capable of moving upwardly and downwardly in a chamber 10, a side part heating device 22 disposed on the side of the crucible 30, a lower heater 24 disposed on the lower part of the crucible 30, a cooling rod 40 capable of penetrating the chamber10 and the lower heater 24 to reach the crucible 30, and capable of moving upwardly and downwardly, a driving unit 50 used for driving the cooling rod 40, and a power distribution device capable of controlling the heating conditions of the side heater 22 and the lower heater 24, and the up-down moving condition of the cooling rod 40.

The invention belongs to a polycrystalline silicon ingot casting technology, and particularly relates to a dual-power adaptive control technology applied to polycrystalline silicon ingot casting. The power P1 of a top thermal-field transformer and the power P2 of a side thermal-field transformer are autonomously allocated in each link of the ingot casting process, and the power allocation is not a constant fixed value anymore, thereby improving the polycrystalline silicon ingot casting efficiency. The technology provided by the invention has the advantages that (1) the crystal growing quality is improved through accurate control on the temperature gradient in a crystal growing process so that the photoelectric conversion efficiency of a battery piece generated by the polycrystalline silicon ingot casting processing is improved by over 0.1 while the maximum of the photoelectric conversion efficiency of the existing technology is only 17.6%; and (2) through accurate control on temperature and reasonable allocation of energy, unnecessary energy loss is reduced, and the power consumption is reduced by 10%.

The invention discloses a welding deformation and joint quality control method. At present, the invention relates to the field of great equipment manufacturing, the welding of the metal material component with the large surface and the long welding line is limited due to the fact that the weight or the size of the component is greatly limited, or is limited by the structural form of a welding joint, so that the problems that the welding deformation of the component is large, and the welding joint easily has defects such as cracks and air holes are solved. According to the welding deformation and joint quality control method, a heating heat source is additionally arranged on the back surface of a welding heat source, the back heating heat source can offset or reduce welding deformation caused in the welding process, meanwhile, the heat source is arranged at the front part of the welding heat source, so that the preheating effect is achieved, welding defects such as cracks, air holes andthe like during welding of high-strength, crack-sensitive materials and thick plate materials can be greatly reduced, so that good welding quality is obtained. The welding deformation and joint quality control method is applied to welding deformation and joint quality control methods.

The invention discloses a hot door device which comprises: a first hot door apparatus which is provided with at least two oppositely-arranged first door bodies; a first drive unit which is used to drive each first door body to move towards each other or away from each other; a second hot door apparatus which is arranged on the downside of the first hot door apparatus and is provided with at least two oppositely-arranged second door bodies, wherein there is an included angle between the opening direction of the second hot door apparatus and the opening direction of the first hot door apparatus; and a second drive unit which is used to drive each second door body to move towards each other or away from each other. Through at least two split-level hot door apparatuses, when the two hot door apparatuses simultaneously open, an opening area gradually expands from the center to the periphery so as to form a temperature conducting area, opening degree of which can be controlled. Therefore, crystal growth more accords with technological requirements. By the adoption of the hot door device, temperature gradient of a crystal growth area is effectively controlled, temperature radiation quantity is controlled, consumption of heat energy is minimized, and the purpose of saving electric energy is achieved. The invention also discloses a polycrystalline ingot furnace with the above hot door device.

The invention discloses short-process hot stamping forming production line equipment and a production technology thereof. The production line equipment comprises a ceramic pinch roller set, a roller hearth furnace, a conveying roller set, a feeding robot, a hydraulic machine system and a discharging robot which are sequentially arranged from the feeding direction to the discharging direction. Rapid heating devices are arranged between adjacent ceramic pinch rollers in the ceramic pinch roller set. The production technology includes the steps that a blank is put on the ceramic pinch rollers and then conveyed along with the ceramic pinch rollers, and the rapid heating devices are used for rapidly heating and the warming the blank; and afterwards, the blank enters the roller hearth furnace to be heated, and the heated blank is pinched to a mold station of the hydraulic machine system through the feeding robot for hot stamping forming. According to the short-process hot stamping forming production line equipment and the production technology thereof, the mode of combining rapid heating with roller hearth furnace heating is adopted, through the rapid warming means of the rapid heating devices, the technical purpose of shortening the heating process of the blank is achieved, the floor area of the roller hearth furnace is decreased, and the manufacturing cost of heating equipment is reduced.

The invention belongs to the technical field of glass processing molds, and particularly relates to a glass hot bending mold and a glass hot bending method. The glass hot bending mold comprises a mold body, and the mold body comprises an upper mold and a lower mold; the upper mold and the lower mold are closed to form a sealing cavity; the upper mold and the lower mold respectively comprise a plurality of groups of mutually independent temperature control assemblies; the temperature control assembly comprises an air supply device and a micro-channel arranged in the upper mold or the lower mold; and the gas supply device is connected with the micro-channel and is used for supplying gas for adjusting the temperature into the micro-channel. The glass hot bending mold provided by the invention can eliminate the temperature gradient of the glass blank due to non-uniform heat transfer of the mold in the hot bending process.

The present invention relates to an apparatus and method for purifying silicon using directional solidification. The apparatus can be used more than once for the directional solidification of silicon without failure. The apparatus and method of the present invention can be used to make silicon crystals for use in solar cells.

The invention relates to a method for drawing a six-inch zone-melting silicon single crystal and a heat shield used in the method. A heat shield is arranged at a position 40mm below a heating coil in a middle furnace chamber of the zone-melting single crystal furnace, the diameter of the upper edge of the heat shield is 90mm, the diameter of the lower edge of the heat shield is 215mm, the height of the heat shield is 40mm, and the pressure of cooling water in a condensation pipeline is 3.2 bar; when the procedures of shoulder expansion, shoulder rotation, equal diameter and ending are carried out, the silicon single crystal moves downwards along with the lower shaft and enters the heat shield area, heat reflected by the heat shield acts on the lower portion of the silicon single crystal, and the phenomenon that due to the fact that the temperature gradient is too large or too small, the silicon single crystal explodes or melts back, and crystal forming fails is avoided.

A continuous doctor-blading process for preparing thin wafer blank of ceramic device includes such steps as mixing and dissolving organic monomer, cross-linking agent and water to obtain pre-prepared liquid, adding ceramic powder and disperser, ball grinding, removing bubbles, adding polymerization trigger of monomer and catalyst, uniform stirring, and solidifying on doctor-blading machine. Its advantages are less consumption of organic substance, less environmental pollution, low cost, high filming speed and continuous production.