CN107574405A - A kind of nitriding control system - Google Patents
A kind of nitriding control system Download PDFInfo
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- CN107574405A CN107574405A CN201710763687.8A CN201710763687A CN107574405A CN 107574405 A CN107574405 A CN 107574405A CN 201710763687 A CN201710763687 A CN 201710763687A CN 107574405 A CN107574405 A CN 107574405A
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- nitriding
- chip microcomputer
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Abstract
The invention discloses a kind of nitriding control system, including single-chip microcomputer, nitriding furnace, nitrogen Material supply system and gas analysis system；The nitrogen Material supply system connects through motor-driven valve with the air inlet of the nitriding furnace, and the single-chip microcomputer adjusts the aperture of motor-driven valve through electronic valve adjuster；Gas in the gas analysis system collection nitriding furnace, is analyzed the gas in nitriding furnace, the measuring and calculating signal that output single-chip microcomputer can identify；Single-chip microcomputer compares the measuring and calculating signal with default ideal value, must deviate and and the corresponding motor-driven valve controlled quentity controlled variable of deviation, regulation nitrogen raw material supply amount.The present invention can realize that nitriding automatically controls, and shorten the nitriding cycle.
Description
Technical field
The present invention relates to a kind of nitriding control system.
Background technology
Ion-nitriding furnace is that processed workpiece is placed in vacuum tank, and nitriding is carried out under the conditions of glow discharge.
Workpiece is put in people's stove and is used as negative electrode, and body of heater is as anode, then a small amount of ammonia of logical people, nitrogen or nitrogen argon mixture gas, then in two interpolars
Applying certain voltage ionizes nitrogen, and heat energy is converted into by workpiece heat with high speed impact workpiece, the kinetic energy of ion after nitrogen ionization
To nitriding temperature.A part of nitrogen of bombarded surface directly oozes people's workpiece surface after capturing electronics, is formed on the surface of the workpiece nitrogenous
The very high Fe in evaporating state, and constantly spread to inside workpiece, so as to reach the purpose of nitriding.
The content of the invention
It is an object of the invention to provide a kind of nitriding control system, can realize that nitriding automatically controls, and shortens nitriding week
Phase.
To reach above-mentioned purpose, the technical solution adopted in the present invention is：A kind of nitriding control system, including single-chip microcomputer,
Nitriding furnace, nitrogen Material supply system and gas analysis system；
The nitrogen Material supply system connects through motor-driven valve with the air inlet of the nitriding furnace, and the single-chip microcomputer is through electronic valve regulation
Device adjusts the aperture of motor-driven valve；
Gas in the gas analysis system collection nitriding furnace, analyzes the gas in nitriding furnace, exports monolithic function
The measuring and calculating signal enough identified；Single-chip microcomputer compares the measuring and calculating signal with default ideal value, must deviate and and deviation phase
Corresponding motor-driven valve controlled quentity controlled variable, adjust nitrogen raw material supply amount.
The nitrogen Material supply system includes liquefied ammonia supply system, air valve and air accumulator, and the liquefied ammonia supply system is through gas
Valve connects the air inlet of air accumulator, the gas outlet connection motor-driven valve of the air accumulator.
Drier is also associated between the air valve and air accumulator.
The gas analysis system includes air-taking system and hydrogen analyzer, and air-taking system gathers the gas in nitriding furnace, warp
Nitrogen gesture set-point is converted into corresponding hydrogen dividing potential drop set-point by the hydrogen dividing potential drop in hydrogen analyzer measure nitriding furnace, single-chip microcomputer,
The hydrogen dividing potential drop value for being to calculate is compared, and draws deviation and its polarity, is obtained and electronic valve regulation that this deviation is corresponding
Amount, the aperture of motor-driven valve is adjusted by electronic valve adjuster after D/A is changed.
The power module for nitriding furnace power supply is also associated with the single-chip microcomputer.
The power module is the pulse power.
Compared with prior art, the beneficial effect that the present invention is reached：
The cycle time 60% ~ 70% of nitriding can be made, realize that nitriding automatically controls, simplify process, part deformation is small, product quality
It is good, the energy is saved, it is pollution-free.
Embodiment
The invention provides a kind of nitriding control system, can be realized automatically controlling for nitriding furnace, the cycle of nitriding is contracted
It is short by 60% ~ 70%, simplify process, part deformation is small, good product quality, saves the energy, pollution-free.
Nitriding control system provided by the invention, including single-chip microcomputer, nitriding furnace, nitrogen Material supply system and gas analysis system
System；Nitrogen Material supply system connects through motor-driven valve with the air inlet of nitriding furnace, and single-chip microcomputer adjusts motor-driven valve through electronic valve adjuster
Aperture；Gas in gas analysis system collection nitriding furnace, is analyzed the gas in nitriding furnace, and output single-chip microcomputer can
The measuring and calculating signal of identification；Single-chip microcomputer by calculate signal compared with default ideal value, must deviate and and deviation it is corresponding
Motor-driven valve controlled quentity controlled variable, adjust nitrogen raw material supply amount.
Nitrogen Material supply system includes liquefied ammonia supply system, air valve and air accumulator, and liquefied ammonia supply system is connected through air valve and stored up
The air inlet of gas tank, the gas outlet connection motor-driven valve of air accumulator.Drier is also associated between air valve and air accumulator, to gasification
Processing is dried in liquid nitrogen.Pressure gauge is connected on air accumulator, for being monitored to the air pressure in air accumulator.
Gas analysis system includes air-taking system and hydrogen analyzer, and air-taking system gathers the gas in nitriding furnace, through hydrogen point
Nitrogen gesture set-point is converted into corresponding hydrogen dividing potential drop set-point, is by the hydrogen dividing potential drop in parser measure nitriding furnace, single-chip microcomputer
The hydrogen dividing potential drop value of measuring and calculating is compared, and draws deviation and its polarity, is obtained and motor-driven valve regulated quantity that this deviation is corresponding, warp
The aperture of motor-driven valve is adjusted after D/A conversions by electronic valve adjuster, adjusts ammonia flow, so as to reach the purpose of control nitrogen gesture.
The nitrogen gesture of atmosphere can be determined according to the partial pressure of ammonia, the partial pressure of hydrogen or ammonia dissociation rate.
The power module for nitriding furnace power supply is also associated with single-chip microcomputer.Power module is the pulse power.
If the advantages of carrying out glow discharge nitriding using the pulse power is as follows：
(1) in the presence of pulse voltage, furnace gas discharges to be controlled by the break-make of high frequency electronic switch, and Current Voltage is natural
Zero passage, itself there is the function of arc extinguishing, due to eliminating current limliting up to Microsecond grade using self-turn-off device, arc extinguishing speed
Resistance, can significantly it save.
(2) while big instantaneous energy is provided, less average energy can be kept, workpiece can be heated up, be incubated
Required ion energy is adjusted by means of conduction ratio, so as to which the parameter of the physical parameter of glow discharge and control temperature be divided
Open, realize independent adjustment, improve nitriding quality.
(3) generation of hollow cathode effect is due to the interaction of ion-electron, produces avalanche effect, causes load
Caused by the aggregation for flowing son, interrupted using the aggregation of carrier after the pulse power by inter-train pause, so as to inhibit hollow the moon
Polar effect, improve the temperature homogeneity of complex parts.In addition, can directly it be filled for some parts for needing plug-hole to shield originally
Stove nitriding, simplifies process.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of nitriding control system, it is characterised in that including single-chip microcomputer, nitriding furnace, nitrogen Material supply system and gas analysis
System；
The nitrogen Material supply system connects through motor-driven valve with the air inlet of the nitriding furnace, and the single-chip microcomputer is through electronic valve regulation
Device adjusts the aperture of motor-driven valve；
Gas in the gas analysis system collection nitriding furnace, analyzes the gas in nitriding furnace, exports monolithic function
The measuring and calculating signal enough identified；Single-chip microcomputer compares the measuring and calculating signal with default ideal value, must deviate and and deviation phase
Corresponding motor-driven valve controlled quentity controlled variable, adjust nitrogen raw material supply amount.
2. nitriding control system according to claim 1, it is characterised in that the nitrogen Material supply system supplies including liquefied ammonia
System, air valve and air accumulator are answered, the liquefied ammonia supply system connects the air inlet of air accumulator, the outlet of the air accumulator through air valve
Mouth connection motor-driven valve.
3. nitriding control system according to claim 2, it is characterised in that be also associated between the air valve and air accumulator
Drier.
4. nitriding control system according to claim 1, it is characterised in that the gas analysis system includes air-taking system
And hydrogen analyzer, air-taking system gather the gas in nitriding furnace, through the hydrogen dividing potential drop in hydrogen analyzer measure nitriding furnace, single-chip microcomputer will
Nitrogen gesture set-point is converted into corresponding hydrogen dividing potential drop set-point, and the hydrogen dividing potential drop value for being to calculate is compared, and draws deviation
And its polarity, obtain and motor-driven valve regulated quantity that this deviation is corresponding, adjusted after D/A is changed by electronic valve adjuster electronic
The aperture of valve.
5. nitriding control system according to claim 1, it is characterised in that be also associated with the single-chip microcomputer as nitriding furnace
The power module of power supply.
6. nitriding control system according to claim 5, it is characterised in that the power module is the pulse power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763687.8A CN107574405A (en) | 2017-08-30 | 2017-08-30 | A kind of nitriding control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763687.8A CN107574405A (en) | 2017-08-30 | 2017-08-30 | A kind of nitriding control system |
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| Publication Number | Publication Date |
|---|---|
| CN107574405A true CN107574405A (en) | 2018-01-12 |
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ID=61029972
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710763687.8A Pending CN107574405A (en) | 2017-08-30 | 2017-08-30 | A kind of nitriding control system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2601258Y (en) * | 2003-01-23 | 2004-01-28 | 浙江大学 | Controllable gas nitriding appts. |
| CN1584100A (en) * | 2004-06-04 | 2005-02-23 | 黄健 | Pressure closing-ring automatic controller for glowing ionic azotizing furnace vacuum furnace |
| CN1962924A (en) * | 2005-11-11 | 2007-05-16 | 盐城丰东热处理有限公司 | Box type vacuum pulse nitriding furnace |
| CN105369190A (en) * | 2015-12-10 | 2016-03-02 | 贵州西南工具(集团)有限公司 | Gas carbonitriding automatic control method and device |
-
2017
- 2017-08-30 CN CN201710763687.8A patent/CN107574405A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2601258Y (en) * | 2003-01-23 | 2004-01-28 | 浙江大学 | Controllable gas nitriding appts. |
| CN1584100A (en) * | 2004-06-04 | 2005-02-23 | 黄健 | Pressure closing-ring automatic controller for glowing ionic azotizing furnace vacuum furnace |
| CN1962924A (en) * | 2005-11-11 | 2007-05-16 | 盐城丰东热处理有限公司 | Box type vacuum pulse nitriding furnace |
| CN105369190A (en) * | 2015-12-10 | 2016-03-02 | 贵州西南工具(集团)有限公司 | Gas carbonitriding automatic control method and device |
Non-Patent Citations (1)
| Title |
|---|
| 中国机械工程学会热处理专业学会《热处理手册》编委会: "《热处理手册 第2版 第3卷 热处理设备》", 31 December 1982, 机械工业出版社 * |
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Application publication date: 20180112 |