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Large vacuum hot-pressing furnace

A vacuum hot-pressing furnace, a large-scale technology, used in non-electric welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of hydraulic displacement accuracy and low temperature control accuracy, and improve the temperature uniformity and temperature control accuracy of samples. Ensure temperature uniformity and achieve the effect of precise control

Inactive Publication Date: 2014-02-19
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a large-scale vacuum hot-press furnace, which overcomes the problems of hydraulic displacement accuracy and low temperature control accuracy.

Method used

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Effect test

Embodiment 1

[0018] Such as figure 1 and 2 As shown, the technical solution adopted in the present invention is: a large-scale vacuum hot-press furnace, including a furnace body skeleton 1, a vacuum chamber 8, a vacuum obtaining system 10, a hydraulic system 9, a heating chamber 11, and six surfaces inserted into the vacuum chamber 8 The heating electrode 14, the thermocouple 16 inserted into the six sides of the heating chamber 11, the furnace frame and the hydraulic system 9 installed on its upper end, the molybdenum pressure rod 4 connected to the hydraulic system and the molybdenum flange 13 connected to the molybdenum pressure rod 4 , the upper molybdenum indenter 5 connected with the molybdenum flange 13, the lower molybdenum indenter sample stage 6 installed in the heating chamber 11 and four molybdenum support columns 7,18,20,21 in contact with it; and the molybdenum support column 7, 18, 20, 21 are in contact with heat-insulating ceramic sheets 17; four stainless steel columns 12...

Embodiment 2

[0021] According to implementation 1 operation steps, with P20 mold steel as material, adopt a kind of large-scale vacuum hot-press furnace of the present invention to manufacture the automobile fog lamp sight ring injection mold that contains conformal flow channel (φ 3mm), such as image 3 shown. The maximum working distance of the upper molybdenum indenter 5 and the lower molybdenum indenter 6 is 210mm; when the heating chamber 11 is heated to 1000°C, the hydraulic system 9 is started to pressurize the workpiece, the pressure is 120 tons, the hydraulic stroke is 0.035mm, heat preservation and pressure maintaining 1 hour. Figure 4 It is the metallographic micrograph of the welding surface. It can be seen from the picture that it is difficult to find the welding line under the condition of magnification of 50 times. By using the injection mold with conformal runner inside, the injection cooling time can be reduced to 18 seconds compared with the traditional injection mold, ...

Embodiment 3

[0023] By implementing 1 operation step, using P20 mold steel as material, adopting a kind of large-scale vacuum hot pressing furnace of the present invention to manufacture a large-scale injection mold with a height of 300mm. Replace the four molybdenum columns 7, 18, 20, 21 so that the maximum working distance between the upper molybdenum indenter 5 and the lower molybdenum indenter sample table 6 is 310mm; when the heating chamber 11 is heated to 1000°C, start the hydraulic system 9 to process the workpiece Pressure, the pressure is 180 tons, the hydraulic stroke is 0.05mm, and the heat preservation and pressure are maintained for 1.5 hours.

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Abstract

The invention relates to a large vacuum hot-pressing furnace which comprises a furnace body framework, a vacuum chamber, an upper molybdenum press head sample table, a lower molybdenum press head sample table, a hydraulic system, a vacuum obtaining system and a heating chamber. The upper molybdenum press head sample table and the lower molybdenum press head sample table are respectively arranged on the upper portion and the lower portion in the vacuum chamber. The lower molybdenum press head sample table is supported by four molybdenum columns. Six-zone temperature control heating is adopted for the heating chamber. A heating chamber metal heat-insulating reflection screen is composed of molybdenum screens and stainless steel screens. The hydraulic system is arranged at the upper end of the furnace body framework. According to the large vacuum hot-pressing furnace, the molybdenum screens and the stainless steel screens are used for shielding in the periphery of the heating chamber, and the six-zone temperature control heating is adopted, so that the heating evenness of the heating chamber is improved, the temperature control precision is +-1DEG C, and the mean temperature of the heating chamber is +-2 DEG C; the displacement precision of the hydraulic system reaches 0.015mm, and the largest tonnage of a hydraulic punch is 200 tons. The large vacuum hot-pressing furnace is favorable for machining precise instruments and large components and has the advantages of being good in heating evenness, high in temperature control precision, quick in temperature rise, high in hydraulic precision, and the like.

Description

technical field [0001] The invention relates to the technical field of a vacuum hot-press furnace, in particular to a multi-functional large-scale vacuum diffusion welding system with six-zone temperature control and applied to three-dimensional runner processing. Background technique [0002] Vacuum hot pressing furnace can be used for manufacturing and processing of conformal cooling runners. Conformal cooling channel As the name implies, the cooling channel surrounds the cavity of the component to provide cooling, so it has a conformal three-dimensional spatial structure, which brings challenges to the traditional precision component manufacturing technology. Conformal channels and microchannels are more and more widely used in modern industry, and can be used in microbial chemical sensors for biomedical research, microheat exchangers for microelectronics, microchannel reactors for fuel cells, aerospace devices, and traditional mold industry. Taking traditional molds as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/02B23K20/14
CPCB23K20/026B23K20/14
Inventor 卢衍锦黄婷婷甘艺良黄金昌崔红生林锦新
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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