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Vacuum carburizing furnace for automatically controlling furnace atmosphere and control method

A technology of vacuum carburizing and furnace atmosphere, applied in non-electric variable control, flow control, control/regulation system, etc., can solve the problems of reducing labor intensity of craftsmen, complicated calculation, and unstable heat treatment quality repeatability, etc. The effect of accurate and reliable measurement value, high adjustment precision and good real-time performance

Inactive Publication Date: 2016-09-21
SHANGHAI YIBAI IND FURNACES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The calculation of the above process is very cumbersome. The change of loading amount or the surface area of ​​the workpiece will affect the depth of the infiltrated layer and the quality of heat treatment. Carburizing process
Time and pulse are used to control the carburizing process of the workpiece to be carburized. If the gas composition in the furnace changes during this process, the control device cannot participate in the adjustment, which causes the repeatability of the heat treatment quality to be unstable.
Although the corresponding calculation software has been developed abroad, this software only replaces the calculation process, reduces the labor intensity of the craftsmen, and cannot control the atmosphere in the furnace in real time.

Method used

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  • Vacuum carburizing furnace for automatically controlling furnace atmosphere and control method
  • Vacuum carburizing furnace for automatically controlling furnace atmosphere and control method

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Effect test

Embodiment 1

[0031] like figure 1 As shown, a vacuum carburizing furnace that automatically controls the atmosphere in the furnace includes a reaction chamber 4 for placing a target workpiece 6, a vacuum pump group 1 connected to the reaction chamber 4 and a gas supply pipeline, and the vacuum carburizing furnace also includes an atmosphere The measuring device 2, the control device 3 and the metering device 7, the atmosphere measuring device 2 is connected with the reaction chamber 4, the metering device 7 is arranged on the gas supply pipeline, and the metering device 7 is used to adjust and calculate the gas feeding time and the progress of the gas supply pipeline. Gas volume, the control device 3 is respectively connected with the atmosphere measuring device 2 and the metering device 7, and the gas supply pipeline leads into C 2 h 2 (acetylene);

[0032] The atmosphere measurement device 2 measures the gas composition and relative content in the reaction chamber 4, and transmits the ...

Embodiment 2

[0041] A method for automatically controlling the atmosphere of a vacuum carburizing furnace, comprising the following steps:

[0042] S1, using the atmosphere measuring device to measure the gas composition and relative content in the reaction chamber 4, and transmit the measurement result to the control device 3 in real time;

[0043] S2, the control device 3 calculates the real-time enrichment rate of the surface of the workpiece according to the measurement results of the atmosphere measuring device 2 and the metering data of the metering device 7. The metering device 7 is arranged on the gas supply pipeline of the vacuum carburizing furnace, and the metering data includes the reaction chamber 4 The length of time for the gas to pass through;

[0044] S3, the control device 3 controls the opening and closing of the gas supply pipeline to adjust the atmosphere in the furnace according to the real-time enrichment rate of the surface of the target workpiece 6, and returns to ...

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Abstract

The invention relates to a vacuum carburizing furnace for automatically controlling the furnace atmosphere and a control method. The vacuum carburizing furnace comprises a reaction chamber (4), a vacuum pump group (1), a gas supply pipeline, an atmosphere measuring device (2), a control device (3) and a metering device (7). The atmosphere measuring device (2) is connected with the reaction chamber (4); the metering device (7) is arranged on the gas supply pipeline, and is used for adjusting the gas supply pipeline and calculating gas feeding duration and gas inflow; the atmosphere measuring device (2) is used for measuring gas components in the vacuum carburizing furnace, and transmitting a measuring result to the control device (3) at real time; the control device (3) is used for calculating the real-time enrichment rate of the surface of a workpiece, and controlling the metering device (7) to adjust the furnace atmosphere until the enrichment rate of the surface of the workpiece meet the set requirement. Compared with the prior art, the vacuum carburizing furnace for automatically controlling the furnace atmosphere provided by the invention has the advantages of simplicity in calculating, real-time adjustment, and wide range of application.

Description

technical field [0001] The invention relates to a vacuum carburizing furnace, in particular to a vacuum carburizing furnace for automatically controlling the atmosphere in the furnace and a control method. Background technique [0002] Vacuum carburizing furnace is an industrial furnace for various heat treatment processes on metal workpieces, which requires strict control of furnace temperature and atmosphere components in the furnace. At present, the atmosphere in the vacuum carburizing furnace in the heat treatment industry market cannot be automatically controlled. It can only be controlled according to the carburizing temperature, the original carbon concentration of the carburized workpiece, the surface carbon concentration after carburizing, the surface carbon concentration after diffusion, and the final surface carbon concentration. Concentration, depth of carburized layer and surface carbon absorption of various materials are used to calculate the carburizing time a...

Claims

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Application Information

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IPC IPC(8): C23C8/20G05D7/06
CPCC23C8/20G05D7/0635
Inventor 杨景峰沈鹏
Owner SHANGHAI YIBAI IND FURNACES CO LTD
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