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

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 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 belongs to the technical field of tempered glass preparation methods, and particularly relates to a homogenization processing method for tempered glass and the tempered glass. The homogenization processing method for the tempered glass comprises the following steps: S1: providing a glass original sheet, and performing the cutting, edging and toughening treatment on the glass originalsheet; S2: performing the homogenization treatment on the glass original sheet, wherein a homogenization treatment process is formed by a temperature rising stage, a constant temperature stage and atemperature reducing stage; S3: setting a temperature rising rate in the temperature rising stage as 1.5 DEG C / s to 4 DEG C / s, setting a temperature in the constant temperature stage as 240 DEG C to 300 DEG C, wherein the duration time is 1.5 h to 2.5 h, and setting a temperature reducing rate in the temperature reducing stage as 0.02 DEG C / s to 0.04 DEG C / s; and S4: moving out the glass originalsheet of which the temperature is reduced to 60 DEG C to 70 DEG C from a homogenizing furnace and continuously cooling to a room temperature. The above method is capable of, through accurately limiting homogenization treatment technological parameters, effectively controlling a temperature gradient in the homogenizing furnace, and guaranteeing the quality of the tempered glass after the homogenization treatment.

The invention provides a peritectic alloy-like analogue directional solidification crystallizer suitable for working under the function of current and belongs to an experimental apparatus for peritectic alloy-like analogue directional solidification under the function of current. A melting-zone hot-end red copper heat-transfer plate and a melting-zone cold-end red copper heat-transfer plate are connected through glass sheets which are bonded with silica gel, so that the leak tightness of a melting zone is guaranteed to facilitate the formation of a stable temperature gradient GT at two ends of the melting zone, and the lateral heat dissipation is avoided. Besides, compared with the crystallizers manufactured by mechanical connection in the prior art, the crystallizer can control the temperature gradient in the directional solidification process more accurately, and provides the support for the experiment and real-time observation on directional solidification of high-melting point peritectic alloy-like analogues under the function of current.

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 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 discloses an electron-beam floating zone smelting furnace and a smelting method. The electron-beam floating zone smelting furnace comprises a furnace body and an argon filled fast cooling system, a water cooling system and a high-vacuum unit which are matched with the furnace body, wherein the furnace body comprises an upper furnace chamber and a lower furnace chamber, and the upper furnace chamber and the lower furnace chamber are in longitudinal and sealed butt joint in a working state; a loading fixing device for fixing a material bar is fixedly mounted in the working area of the furnace body, the working area of the furnace body is provided with a ring-type electron gun, the ring-type electron gun is provided with an electron gun moving system, narrow-area melting of the raw material bar is achieved under high-energy heat, gas is separated out, impurities are evaporated and single crystals are generated in the whole complex physical and chemical process, and smelting is achieved.

The invention relates to a method for 3D printing metal materials with controllable temperature gradient in the solidification process. The steps are: 1) Establish the CAD model of metal material parts; 2) Select the processing technology; 3) Single-pass cladding experiment; 4) Model slicing and processing trajectory design; 5) Use finite element analysis software to simulate the temperature field in the processing process ;6) Divide the processing area; 7) Fit the temperature-time curve of the feature point; 8) Set the temperature gradient; 9) Solve the control signal of each resistance wire on the platform; 10) Laser 3D printing. The present invention can control the temperature gradient of the forming process in the processing process, obtain metal materials with low residual stress and good mechanical properties, and greatly save costs; the temperature gradient of the processing process can also be set according to requirements, so as to prepare metal materials in a directional manner .

A high-purity aluminum purification device based on segregation method belongs to metal purification technical field and comprises an internal heater, a plurality of electromagnetic stirrers and a purification furnace body. The internal heater is positioned at the center of the purification furnace body and the electromagnetic stirrers are positioned at the periphery of the furnace body and distributed evenly. The invention controls the melt flow field to improve the diffusion and distribution of the impurity elements discharged during the segregation process of the aluminum melt, accordinglyaccelerates the mixed diffusion of solute elements in the melt, reduces the frontal impurity concentration of the solid-liquid interface and realizes the purpose of improving the aluminum purification efficiency.