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Vacuum sintering furnace with controllable cooling rate and control method thereof

A technology of vacuum sintering furnace and cooling rate, which is applied in the direction of furnace, crucible furnace, furnace type, etc., can solve the problems of inability to control the temperature cooling rate of the furnace body and heat preservation chamber, and poor quality of finished products, so as to achieve good mechanical properties and product quality , good cooling effect, and the effect of improving yield

Inactive Publication Date: 2019-05-07
杭州佰晖科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, it is impossible to control the cooling rate of the temperature in the furnace

Method used

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  • Vacuum sintering furnace with controllable cooling rate and control method thereof
  • Vacuum sintering furnace with controllable cooling rate and control method thereof
  • Vacuum sintering furnace with controllable cooling rate and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment one, such as figure 1 with figure 2 As shown, a vacuum sintering furnace with controllable cooling rate includes a furnace body 1 and a heat preservation chamber 2 . The bottom of the heat preservation chamber 2 is supported in the furnace body 1 by pads, and a gap 3 is formed between the outer walls on both sides of the heat preservation chamber 2 and the inner wall of the furnace body 1 .

[0060] Both ends of the heat preservation chamber 2 are respectively provided with an air inlet 21 and an air outlet 22 . The air inlet 21 is provided with a thermal insulation door 1 211 , and the air outlet 22 is provided with a thermal insulation door 2 221 . The air inlet 21 and the air outlet 22 are cylindrical passages, and the heat preservation door 1 211 and the heat preservation door 2 221 are respectively in the shape of disks matched with the two. When the heat preservation door 1 211 and heat preservation door 2 221 are opened outward, an annular opening ...

Embodiment 2

[0094] Embodiment two, such as image 3 with Figure 4 As shown, a cooling rate controllable vacuum sintering furnace differs from Embodiment 1 in that the cooling pipe 7 includes a main circulation pipe 71 with two ends connected to the liquid inlet pipe 16 and the liquid outlet pipe 17 and two circulation pipes. Branch pipes 72 , each circulation branch pipe 72 is equipped with a solenoid valve 18 coupled to the controller 9 at one end connected to the liquid inlet pipe 16 .

[0095] The control method of the controller 9 of the present embodiment to the solenoid valve 18 is as follows:

[0096] After the processing module 92 reads the indoor temperature output by the temperature measuring device 3 14, find the operating point corresponding to the indoor temperature in the temperature control curve, and compare the preset heat absorption rate value at the operating point with the actual heat absorption rate value;

[0097] When the difference between the preset heat absor...

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Abstract

The invention discloses a vacuum sintering furnace with controllable cooling rate and a control method thereof. The vacuum sintering furnace with the controllable cooling rate a comprises a furnace body and a heat preservation chamber, an air inlet and an air outlet are formed in the heat preservation chamber, the furnace body is provided with a cooling pipe and a variable-frequency fan, wherein the cooling pipe and fan blades are arranged in the furnace body, the cooling pipe is communicated with a liquid inlet pipe and a liquid outlet pipe, the variable-frequency fan is coupled with a temperature control system, and the temperature control system comprises a temperature measuring device I, a temperature measuring device II, a temperature measuring device III and a controller, wherein thetemperature measuring device I is used for detecting and outputting liquid inlet temperature in the liquid inlet pipe, the temperature measuring device II is used for detecting and outputting liquidoutlet temperature in the liquid outlet pipe, the temperature measuring device III is used for detecting and outputting indoor temperature in the heat preservation chamber, the controller is coupled with the temperature measuring device I, the temperature measuring device II, the temperature measuring device III and the variable-frequency fan, and used to control and adjust rotating speed of the variable-frequency fan to follow a preset temperature control curve according to the received liquid inlet temperature, liquid outlet temperature and indoor temperature, and the temperature control curve is correlated with the indoor temperature and a preset heat absorption speed value. The vacuum sintering furnace with the controllable cooling rate has the advantages that the cooling rate in the furnace body and the temperature preservation chamber is controllable.

Description

technical field [0001] The present invention relates to a metal powder processing equipment, more specifically, it relates to a vacuum sintering furnace with controllable cooling rate and its control method. Background technique [0002] Vacuum sintering furnace is a complete set of equipment that uses the principle of medium-frequency induction heating to generate high temperature in the tungsten crucible in the coil under vacuum or protective atmosphere conditions, and then sinters cemented carbide cutter heads and various metal powder compacts. Metal powder processing equipment designed for the industrial production of cemented carbide, dysprosium metal and ceramic materials. [0003] In the prior art, a spiral tube is usually arranged in the furnace body of the vacuum sintering furnace. Rapid cooling of the sintering furnace is achieved by circulating the cooling medium into the coiled tube. Since a single pump cooling medium is used for cooling, flexible cooling speed...

Claims

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Application Information

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IPC IPC(8): F27B14/04F27B14/20
Inventor 涂伟伦姚鑫陈信宏赵育德林云汪江明
Owner 杭州佰晖科技有限公司