A hot press sintering machine and its temperature uniformity control method
A technology of hot-pressing sintering and temperature control device, applied in furnace control device, lighting and heating equipment, furnace, etc., can solve problems such as uneven heating
Active Publication Date: 2018-10-23
ZHENGZHOU RES INST FOR ABRASIVES & GRINDING CO LTD
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- Application Information
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Problems solved by technology
[0004] The purpose of the present invention is to provide a hot press sintering machine to solve the problem of uneven heating caused by the overall heating method adopted by the traditional hot press sintering machine
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[0020] The present invention will be described in further detail below with reference to the accompanying drawings.
[0021] like figure 1 As shown, the upper electrode in the hot-pressing sintering machine is divided into 4 parts, named: electrode plate 1, electrode plate 2, electrode plate 3 and electrode plate 4, each part is an isosceles right triangle. The insulation between these four parts is set, and the insulation method is as follows: insulation setting is performed through insulating materials, or the insulation setting is achieved by a certain distance, and the optional distance range is 1-10mm. There are no special requirements for the lower electrode, such as no treatment of the lower electrode, and it can be used directly, such as figure 2 shown as a conductive body. Therefore, the positional relationship between the upper and lower electrodes and the graphite mold is as follows image 3 shown. Since the upper electrode is divided into four parts, correspon...
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The invention relates to a hot-pressing sintering machine and a temperature uniformity control method thereof. The sintering machine comprises two electrodes, n temperature sensors and a temperature control device. The first electrode is divided into n electrode sections arranged in a mutual insulation mode, and n is larger than or equal to two. Each electrode section is connected with a corresponding power supply line and used for leading-in of an electric current, and thus the electric current flows among the corresponding electrode section, a mold and the second electrode. The temperature sensors are in one-to-one correspondence with the electrode sections and used for detecting the temperature of the corresponding electrode sections. The temperature control device is in sampling connection with the n temperature sensors and in control connection with all the power supply lines and used for correspondingly adjusting electric currents in the corresponding power supply lines according to collected temperature values. Temperature on the electrodes of all parts can be made to tend to equality, then temperature in a graphite mold is controlled and distributed uniformly, the condition of a nonuniform temperature field is eliminated, thus uniformity of performance of sintered products is ensured, and the quality of the sintered products is improved.
Description
technical field [0001] The invention relates to a hot pressing sintering machine and a temperature uniformity control method thereof. Background technique [0002] As a common industrial equipment, hot pressing sintering machine has a wide range of applications. The hot-pressing sintering machine has two electrodes. According to the positional relationship with the graphite mold, the two electrodes are the upper electrode and the lower electrode, respectively. The graphite mold is located between the two electrodes. A large current is applied to the mold, so that the mold relies on its own resistance to heat up and indirectly heats the powder material in the mold, and at the same time applies axial pressure to the powder in the mold, so that the powder material coalesces to form a specific shape under the action of temperature and pressure bulk material. Hot pressing sintering machine is widely used in high temperature sintering of powder metallurgy, superhard material pro...
Claims
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IPC IPC(8): B29C70/54F27B21/00F27B21/14
CPCF27B21/00F27D19/00F27D2019/0003F27D2019/0037
Inventor 韩欣徐帅牛俊凯
Owner ZHENGZHOU RES INST FOR ABRASIVES & GRINDING CO LTD