CN205241776U - Dry cyaniding automated control device - Google Patents
Dry cyaniding automated control device Download PDFInfo
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- CN205241776U CN205241776U CN201521022370.1U CN201521022370U CN205241776U CN 205241776 U CN205241776 U CN 205241776U CN 201521022370 U CN201521022370 U CN 201521022370U CN 205241776 U CN205241776 U CN 205241776U
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- control device
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Abstract
The utility model discloses a dry cyaniding automated control device, this equipment include nitriding furnace 1 and PLC controller, devices such as pressure sensor, hydrogen probe, thermocouple, blade, fan, heating temperature control device, exhaust apparatus 9, part after through degrease, washing, surface treatment in the stove closed loop feedback control through vacuum pump, nitrogen gas, ammonia, ethanol and temperature, pressure accomplish the tufftride to all kinds of nitrogenize steel commonly used such as high -speed steel, stainless steels, the utility model discloses energy -conserving high -efficient, the easy maintenance, pollution -free, the product quality performance is high, adopts PLC control system to establish fast to the quantity of the corresponding part technological parameter with the material, and the white bright layer of control part, the reticular layer degree of depth are stable, and stainless steel batch production homogeneity is stable, and the little power consumption of ammonia consumption is low, and the nitrogenize time is few efficient.
Description
Technical field
A kind of dry cyaniding automatic control device of the present utility model, belongs to dry cyaniding technical field.
Background technology
Nitrocarburizing is taking nitriding as the main chemical heat treatment process that infiltrates carbon simultaneously, and also referred to as tufftride, main purpose is to improve the wearability of steel and seizure resistance to meet the requirement of product quality. In tufftride industry, enterprise is constantly pursued has production control method that more excellent production technology, higher-quality nitridation product and automaticity are more perfect and device to reduce cost of labor, reduce human error and to increase technology stability, increases product quality and enhances productivity etc.
Existing nitrocarburizing technology is mainly divided into liquid processes and gas method is salt bath tufftride and gas soft nitriding, it is loaded down with trivial details that the salt-bath nitriding of the current liquid processes of cause has nitridation process, so the shortcoming industries such as product is poisonous, enterprise is high to treatment cost of waste liquor, residual scrap ring environment pollution large, nitrogenize efficiency is low are just progressively eliminated liquid processes salt-bath nitriding, gas soft nitriding is exactly in fact under cryogenic conditions, taking nitriding as main low-temperature nitrocarburizing, make carbon and nitrogen infiltrate a kind of thermo-chemical treatment on steel surface simultaneously. Wherein nitriding is used ammonia that nitrogen-atoms is provided, carburizing is used CO or ethanol etc. that carbon is provided, in nitriding process, utilize chlorion to destroy passivation film on stainless steel surface, its feature be treatment temperature low, be not subject to the restriction of steel grade and the processing time short, workpiece deformation is little, steady quality, can significantly improve the performances such as the wearability, fatigue strength, bite-resistant, anti scuffing of part.
At present aspect gas soft nitriding, the domestic tufftride that is mainly used in high-speed steel, stainless steel gas tufftride is not yet universal,, nitrogenize poor stability immature mainly due to technology and the shortcoming such as conventional gas tufftride is of long duration, efficiency is low and stainless steel gas tufftride in enormous quantities is inhomogeneous, qualification rate is low. comprehensive industry situation, gas soft nitriding at home and abroad mainly divides high, normal, basic tri-layer. be respectively low level: adopt artificial omnidistance manually control, complete gas nitrocarburizing according to time control and experience, cause that nitrogenize efficiency is low, ammonia consumption is large, constant product quality deficiency, only for the tufftride of high-speed steel, cannot realize stainless tufftride, percent defective is high, and troublesome poeration workman cultivates the shortcomings such as difficult, middle-level: domestic low automation or the semi-automatic control program more generally adopting, detect sampling gas with stove outer sensor and reach the half-closed loop control to ethanol and ammonia, shortcoming is that control accuracy is low, live signal lags behind compared with seldom going out stablize nitriding process parameter and ammonia consumption is large, can realize high-speed steel tufftride and be difficult to realize stainless even tufftride in enormous quantities. wherein as: what China Patent Publication No. CN102517541A used be manually or the process equipment of Semi-automatic control system, this process equipment Artificial Control poor stability, labour intensity is large, manually control efficiency is low and nitridation time is long, nitrogenize ammonia usage is large. high-level: i.e. Automatic Control tufftride, divide two kinds of home and overseas, adopt the equipment of external high-precision detecting sensor and a complete set of hierarchy of control, shortcoming is that cost is too high, system is loaded down with trivial details, Maintenance Difficulty, maintenance cost is high, domestic manufacturer is the ground zero stage to this level at present, technology is not quite ripe, have and produce taking carbon monoxide as the complete closed-loop control tufftride of horizontal chamber furnace (oven) of carbon atom is provided, but adopt import hydrogen-oxygen probe, cost is high, and ammonia consumption is large, the nitridation time nitrogenize infiltration layer homogeneity question with solving the intensive finding of multilayer (as air conditioner compressed machine part slide plate) of a specified duration, so existing gas soft nitriding automation control method and device are still perfect not.
Utility model content
The purpose of this utility model is: a kind of simple in structure, safe and reliable, efficient energy-saving, easy care are provided, pollution-free, product quality performance is high, adopt PLC control system to establish fast for the quantity of corresponding part and the technological parameter of material, nitride layer, white layer, the lamina reticularis degree of depth of controlling part are stable, and stainless steel batch production uniformity is stable, and the little power consumption of ammonia consumption is low, the few high a kind of dry cyaniding automatic control device of efficiency of nitridation time, to overcome the deficiencies in the prior art.
The utility model is achieved in that a kind of dry cyaniding automatic control device, comprise nitriding furnace, PLC controller, heating temperature control device, ammonia drying equipment and touch-screen, on described nitriding furnace, be provided with pressure sensor, hydrogen probe, thermocouple and electric furnace heating wire, be provided with blade at nitriding furnace top, blade is connected with blower fan, described heating temperature control device is connected with electric furnace heating wire with thermocouple, described nitriding furnace is connected with vavuum pump by vacuum pipe, described nitriding furnace is connected with exhaust apparatus by discharge duct, described blower fan, pressure sensor, hydrogen probe, heating temperature control device, exhaust apparatus and vavuum pump are connected with PLC controller respectively, described nitriding furnace bottom is connected with respectively nitrogen pipeline, ethanol pipeline and ammonia pipeline, described exhaust apparatus is connected with liquefaction tracheae.
Between described hydrogen probe and PLC controller, be provided with hydrogen analyzer; On described vacuum pipe, be provided with vacuum pipe valve, on described discharge duct, be provided with drain tap and exhaust solenoid valve.
On described nitrogen pipeline, be provided with nitrogen magnetic valve, on described ethanol pipeline, be provided with ethanol magnetic valve and three pin titre meters, on described ammonia pipeline, be provided with constant control valve and controlled quentity controlled variable control valve and ammonia flow meter.
On described ammonia pipeline, be provided with ammonia drying equipment, on ammonia drying equipment, be provided with dew point hygrometer.
On described exhaust apparatus, be provided with igniter.
On ammonia pipeline, be provided with ammonia flow meter.
On liquefaction tracheae, be provided with liquefied gas magnetic valve.
Utilize this kind of dry cyaniding automation control method and device to carry out 5 batches of gas nitrocarburizing processing to 11Cr17 stainless steel (taking 11Cr17 stainless steel as example), each experiment batch number of parts is 5040,5 experiments are altogether tested part and are add up to 25200, are below the examples measure result of five batches of parts.
Owing to having adopted technique scheme, when the utility model work, by said method, it can complete stainless steel slide plate (taking 11Cr17 stainless steel slide plate as example) single batch and is greater than 5000, ammonia flow is less than 4m3/h, the nitrogenize used time is less than 300min, product 30um place hardness is greater than 900HV, 60um place hardness is greater than 600HV, nitride layer, white layer is greater than 5um, lamina reticularis is greater than 80um, qualification rate is greater than 99.5%, with comparing system equipment emphasis both at home and abroad, to have realized the nitrogenize infiltration layer of the intensive stainless steel thin slice of multilayer part even, gas raw material consumption is low, the large nitrogenize efficiency of single batch is high, the four major problem that the nitrogenize used time is few.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is system control procedure block diagram of the present utility model;
Description of reference numerals: 1-nitriding furnace, 2-PLC controller, 3-hydrogen probe, 4-thermocouple, 5-blade, 6-blower fan, 7-heating temperature control device, 8-pressure sensor, 9-exhaust apparatus, 10-vavuum pump, 11-vacuum pipe, 12-hydrogen analyzer, 13-drain tap, 14-discharge duct, 15-vacuum pipe valve, 16-nitrogen pipeline, 17-ethanol pipeline, 18-ammonia pipeline, 19-nitrogen magnetic valve, 20-ethanol magnetic valve, 21-constant control valve, 22-controlled quentity controlled variable control valve, 23-tri-pin titre meters, 24-ammonia drying equipment, 25-dew point hygrometer, the 26-tracheae that liquefies, 27-igniter, 28-ammonia flow meter, 29-liquefied gas magnetic valve, 30-exhaust solenoid valve, 31-electric furnace heating wire, 32-touch-screen.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail, but not as to restriction of the present utility model.
Embodiment of the present utility model: a kind of dry cyaniding automatic control device, comprise nitriding furnace 1, PLC controller 2, heating temperature control device 7, ammonia drying equipment 24 and touch-screen 32, on described nitriding furnace 1, be provided with pressure sensor 8, hydrogen probe 3, thermocouple 4 and electric furnace heating wire 31, be provided with blade 5 at nitriding furnace 1 top, blade 5 is connected with blower fan 6, described heating temperature control device 7 is connected with electric furnace heating wire 31 with thermocouple 4, described nitriding furnace 1 is connected with vavuum pump 10 by vacuum pipe 11, described nitriding furnace 1 is connected with exhaust apparatus 9 by discharge duct 14, described blower fan 6, pressure sensor 8, hydrogen probe 3, heating temperature control device 7, exhaust apparatus 9 and vavuum pump 10 are connected with PLC controller 2 respectively, described nitriding furnace 1 bottom is connected with respectively nitrogen pipeline 16, ethanol pipeline 17 and ammonia pipeline 18, described exhaust apparatus 9 is connected with liquefaction tracheae 26.
Between described hydrogen probe 3 and PLC controller 2, be provided with hydrogen analyzer 12; On described vacuum pipe 11, be provided with vacuum pipe valve 15, on described discharge duct 14, be provided with drain tap 13 and exhaust solenoid valve 30.
On described nitrogen pipeline 16, be provided with nitrogen magnetic valve 19, on described ethanol pipeline 17, be provided with ethanol magnetic valve 20 and three pin titre meters 23, on described ammonia pipeline 18, be provided with constant control valve 21 and controlled quentity controlled variable control valve 22 and ammonia flow meter 28.
On described ammonia pipeline 18, be provided with ammonia drying equipment 24, on ammonia drying equipment 24, be provided with dew point hygrometer 25.
On described exhaust apparatus 9, be provided with igniter 27.
On ammonia pipeline 18, be provided with ammonia flow meter 28.
On liquefaction tracheae 26, be provided with liquefied gas magnetic valve 29.
A control method for dry cyaniding automatic control device, this control method is carried out according to the following steps:
1) forvacuum: open nitriding furnace fire door, put into after part and close fire door, close after drain tap, open vavuum pump, open blower fan and heating temperature control device, while being evacuated to the vacuum 20～35pa of setting, vavuum pump cuts out;
2) protection gas is filled: nitrogen magnetic valve passes into nitrogen and reach malleation to stove after opening, when being 5～20 centimeter water column, force value opens exhaust solenoid valve, regulating exhaust solenoid valve capacity to continue logical nitrogen to furnace pressure is 15～45 centimeter water columns, keeps progressively increasing exhaust valve opening after 3～8 minutes and reduces pressure to 0～15 centimeter water column;
3) raw material adds: the motor that starts rotating vane, when the furnace temperature of nitriding furnace rises to 120 DEG C～250 DEG C, open ethanol magnetic valve, pass into except after passivating film ethanolic solution to three pin titre meter and enter in stove, regulate three pin titres to control by nitriding process requirement and drip speed, after keeping logical nitrogen to furnace temperature to reach 250 DEG C～400 DEG C, close nitrogen magnetic valve, stop passing into nitrogen ammonia drying equipment startup simultaneously, dew point hygrometer detects the dry value of ammonia, dry ammonia is provided, constant control valve and controlled quentity controlled variable control valve are opened simultaneously, regulate exhaust solenoid valve or drain tap to make controling of the pressure of the oven in setting value, hydrogen analyzer monitoring ammonia dissociation rate, in the time that actual ammonia dissociation rate reaches the ammonia dissociation rate setting value of PLC controller setting, controlled quentity controlled variable control valve enters the control of high frequency break-make automatically, the total flow of flowmeter monitoring ammonia,
4) exhaust-gas treatment: when the furnace temperature of nitriding furnace reaches 400 DEG C～500 DEG C, open liquefied gas magnetic valve, pass into liquefied gas to exhaust apparatus, ignition device, utilize the combustion-supporting waste gas of liquefied gas sustained combustion, liquefied gas closed electromagnetic valve, stops combustion-supporting when reaching 15%～45% interval ammonia dissociation rate of setting in stove and be the stable ammonia dissociation rate of waste gas burning;
5) insulation nitrogenize: nitriding furnace continues to heat up, the furnace temperature of nitriding furnace enters nitrogenize holding stage while reaching 560 DEG C～580 DEG C, insulation timing starts, temperature retention time 180～300min, pressure enters closed-loop control, be controlled at 10～28 centimeter water columns, set single hop or three sections of ammonia dissociation rates, realize the total time of stainless steel slide plate tufftride lower than 300min;
6) cooling is come out of the stove: after temperature retention time finishes, constant control valve and controlled quentity controlled variable control valve are closed simultaneously, and ethanol closed electromagnetic valve, blower fan are closed, heated and close, and nitrogen magnetic valve is opened the furnace temperature of nitriding furnace is cooled to below 280 DEG C, and door opened, product is come out of the stove.
Described constant control valve and controlled quentity controlled variable control valve total flow are 2～4m3/h, and PLC controller records ammonia dissociation rate and ammonia flow time graph.
Described thermocouple 4 is divided into upper thermocouple and bottom thermocouple, be respectively used to detect the temperature conditions of upper of furnace body and bottom, when the temperature detecting is passed to heating temperature control device 7 in time, carry out body of heater heating being controlled electric furnace heating wire 31 by heating temperature control device 7, heating temperature control device is controlled by PLC and signal back PLC simultaneously.
Pollution that the utility model solves conventional softer nitrogenize is large, energy consumption is large, efficiency is low, manually or the gas nitriding inhomogeneities of semiautomatic control and solve the situations such as traditional gas soft nitriding batch is low, complete the intensive stainless steel of the multilayer gas soft nitriding in batches that single shove charge is greater than 5000 slip sheet of air conditioner compressors, realize the in batches efficient tufftride of stainless steel parts. This equipment comprises nitriding furnace 1 and PLC controller 2, the devices such as pressure sensor 8, hydrogen probe 3, thermocouple 4, blade 5, blower fan 6, heating temperature control device 7, exhaust apparatus 9, part by degreasing, cleaning, surface treatment after in stove the closed loop feedback control by vavuum pump 10, nitrogen, ammonia, ethanol and temperature, pressure complete the tufftride to all kinds of conventional nitrogenize steel such as high-speed steel, stainless steel.
The utility model is respectively controlled parameter can touch screen display and monitoring in real time, parameter historical record can be checked and preservation and call parameters, can realize Data Comparison, adjustment to the tufftride of new material, determine fast technological parameter, can directly call to the nitride material of determining technique the technological parameter that PLC controller 2 is preserved, preserve technological parameter quantity and can reach more than 1000, the total depth of penetration of its nitridation product, nitride layer, white layer, lamina reticularis and part nitrogenize uniformity all reach perfect condition; By to part surface preparation before nitrogenize with to the finite element analysis of gas stream in the stove hydrodynamics, the situations such as the inhomogeneous and nitrogenize efficiency of the intensive finding nitrogenize of multilayer is low are solved, it is even that equipment emphasis has been realized the nitrogenize infiltration layer of the intensive stainless steel thin slice of multilayer part, gas raw material consumption is low, the large nitrogenize efficiency of single batch is high, the four major problem that the nitrogenize used time is few.
Claims (7)
1. a dry cyaniding automatic control device, comprise nitriding furnace (1), PLC controller (2), heating temperature control device (7), ammonia drying equipment (24) and touch-screen (32), it is characterized in that: on described nitriding furnace (1), be provided with pressure sensor (8), hydrogen probe (3), thermocouple (4) and electric furnace heating wire (31), be provided with blade (5) at nitriding furnace (1) top, blade (5) is connected with blower fan (6), described heating temperature control device (7) is connected with electric furnace heating wire (31) with thermocouple (4), described nitriding furnace (1) is connected with vavuum pump (10) by vacuum pipe (11), described nitriding furnace (1) is connected with exhaust apparatus (9) by discharge duct (14), described blower fan (6), pressure sensor (8), hydrogen probe (3), heating temperature control device (7), exhaust apparatus (9) and vavuum pump (10) are connected with PLC controller (2) respectively, described nitriding furnace (1) bottom is connected with respectively nitrogen pipeline (16), ethanol pipeline (17) and ammonia pipeline (18), described exhaust apparatus (9) is connected with liquefaction tracheae (26).
2. dry cyaniding automatic control device according to claim 1, is characterized in that: between described hydrogen probe (3) and PLC controller (2), be provided with hydrogen analyzer (12); On described vacuum pipe (11), be provided with vacuum pipe valve (15), on described discharge duct (14), be provided with drain tap (13) and exhaust solenoid valve (30).
3. dry cyaniding automatic control device according to claim 1, it is characterized in that: on described nitrogen pipeline (16), be provided with nitrogen magnetic valve (19), on described ethanol pipeline (17), be provided with ethanol magnetic valve (20) and three pin titre meters (23), on described ammonia pipeline (18), be provided with constant control valve (21) and controlled quentity controlled variable control valve (22) and ammonia flow meter (28).
4. dry cyaniding automatic control device according to claim 3, is characterized in that: on described ammonia pipeline (18), be provided with ammonia drying equipment (24), be provided with dew point hygrometer (25) on ammonia drying equipment (24).
5. dry cyaniding automatic control device according to claim 1, is characterized in that: on described exhaust apparatus (9), be provided with igniter (27).
6. dry cyaniding automatic control device according to claim 1, is characterized in that: on ammonia pipeline (18), be provided with ammonia flow meter (28).
7. dry cyaniding automatic control device according to claim 1, is characterized in that: on liquefaction tracheae (26), be provided with liquefied gas magnetic valve (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521022370.1U CN205241776U (en) | 2015-12-10 | 2015-12-10 | Dry cyaniding automated control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521022370.1U CN205241776U (en) | 2015-12-10 | 2015-12-10 | Dry cyaniding automated control device |
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| CN205241776U true CN205241776U (en) | 2016-05-18 |
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| CN201521022370.1U Withdrawn - After Issue CN205241776U (en) | 2015-12-10 | 2015-12-10 | Dry cyaniding automated control device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106191764A (en) * | 2016-08-20 | 2016-12-07 | 刘玉珠 | A kind of automatic energy-saving dustless metal oozes system altogether |
| CN114517281A (en) * | 2020-11-19 | 2022-05-20 | 青岛泽昊汽车配件有限公司 | Vacuum nitriding furnace for pressure bar support sleeve |
-
2015
- 2015-12-10 CN CN201521022370.1U patent/CN205241776U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106191764A (en) * | 2016-08-20 | 2016-12-07 | 刘玉珠 | A kind of automatic energy-saving dustless metal oozes system altogether |
| CN106191764B (en) * | 2016-08-20 | 2018-06-22 | 刘玉珠 | A kind of automatic energy-saving dustless metal permeation system |
| CN114517281A (en) * | 2020-11-19 | 2022-05-20 | 青岛泽昊汽车配件有限公司 | Vacuum nitriding furnace for pressure bar support sleeve |
| CN114517281B (en) * | 2020-11-19 | 2024-02-06 | 青岛泽昊汽车配件有限公司 | Vacuum nitriding furnace for pneumatic rod support sleeve |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
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Granted publication date: 20160518 Effective date of abandoning: 20171222 |