CN2212014Y - Drop rare-earth carburization micro computer controller - Google Patents
Drop rare-earth carburization micro computer controller Download PDFInfo
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- CN2212014Y CN2212014Y CN 94205831 CN94205831U CN2212014Y CN 2212014 Y CN2212014 Y CN 2212014Y CN 94205831 CN94205831 CN 94205831 CN 94205831 U CN94205831 U CN 94205831U CN 2212014 Y CN2212014 Y CN 2212014Y
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- carburizing
- loop
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- pump
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Abstract
The utility model relates to an automatic control device used for controlling carburizing temperature and carburizing dropping amount. The utility model is characterized in that the automatic control device is composed of a closed-loop temperature control circuit with temperature feedback and an open-loop control system which can control the dropping speed and dropping mount of both a carburizing agent and a rare earth accelerant. The closed-loop temperature control circuit is composed of a microcomputer controller, a temperature quantity controller, a controllable silicon and a temperature sensor. Theopen-loop control system is composed of the microcomputer controller, a carburizing agent digital display, a stepping motor, a leading screw drive device, a pump, a stop valve and a liquid storage tank for both the carburizing agent and the accelerant. The controller is suitable for gas carburization of a well type furnace.
Description
The utility model relates to a kind of cementing furnace temperature and carburizing agent of being used for, and energizer drips speed and drips the automatic control device of amount.
All kinds of engineering works of China extensively adopt instillation formula pit furnace gas cementation at present, handle various machine parts, its processing parameter such as carburizing temperature, the penetration enhancer amount of dripping, and different process stage such as intensification exhaust, the adjustment of technological temperature such as carbon potential adjustment, the quenching of oozing by force, spread, lower the temperature and keep, come out of the stove and the penetration enhancer amount of dripping is fully by manual operation, frequent and the accuracy extreme difference has a strong impact on the further raising of quality product.
For drop-feeding gas carburization, the microcomputer control of cementation process can be divided into two big classes, and a class is open loop control, and another kind of is closed-loop control.Nearly all adopt closed loop adjustment both at home and abroad, it is by Carbon Potential Inside Furnace transmitter (oxygen probe, CO, CO
2, CH
4Analyser etc.), computer and topworks's (drip trap, pump etc.) form, can accurately control Carbon Potential Inside Furnace (precision can reach ± 0.05%).Computer also can distribute to the infiltration layer carbon concentration, depth of penetration gives newspaper and control.But this type of device complexity high cost costliness, suitability is relatively poor.Open loop control is not almost used owing to low precision.The domestic open-loop control technology that also occurred, as dripping the amount sequencer, photoelectricity drips amount controller etc., all because of not applying in the immature production of technology.
The purpose of this utility model is the computer control device of a kind of instil formula penetration enhancer and energizer of design, this device should have temperature and penetration enhancer drips speed and drips the semi-automatic controllability of measuring, and can select different carburization process schemes control in real time at different carburizing requirements and condition.
The utility model instillation formula re carburizing computer control device, comprise that a database 5 with multiple re carburizing processing sequence and one are attached thereto the microcomputerized controller 6 that connects, it is characterized in that this device is made up of the open-loop control system of dripping speed and dripping amount that a closed loop temperature control loop that has a Temperature Feedback and can control carburizing agent and rare-earth energizer, closed loop temperature control loop is by microcomputerized controller 6, temperature digital display controller 8, temperature sensor 9, the loop that silicon controlled rectifier 10 and cementing furnace 13 are formed, dripping speed and dripping the amount open-loop control system is by microcomputerized controller 6, penetration enhancer digital display controller 7, stepper-motor 2, energizer liquid-storing box 11, carburizing agent liquid-storing box 12, lead screw gear 1, pump 3, the open loop system that stopping valve 4 and cementing furnace 13 constitute, wherein, microcomputerized controller 6 is connected with two stepper-motors 2 respectively by penetration enhancer digital display controller 7, stepper-motor 2 is by the piston of lead screw gear 1 control pump 3, and the oil cylinder of pump 3 is communicated with energizer liquid-storing box 11 carburizing agent liquid-storing boxs 12 and cementing furnace 13 respectively by four stopping valve 4.
Instillation formula re carburizing computer control device excellent property, operation control is simple, go into stove from workpiece, intensification exhaust, carbon potential adjustment, ooze by force, spread, lower the temperature and the quenching of coming out of the stove, all practicable automatic control of the temperature of whole carburization process process and the penetration enhancer amount of dripping.Its salient features is as follows:
1. the time variable control of carburizing temperature: adapt to the discontinuous running characteristics, stove branch temperature control, precision ± 2 ℃.
2. carburizing agent time variable control: generally adopt kerosene, acetone etc. to make carburizing agent, its intensification, exhaust after workpiece is gone into stove, ooze the amount of dripping in different process stages such as strong, diffusion, can accurately control.Instillation precision ± 2%.
3. rare-earth energizer: the time variable control rare-earth energizer also is the thinner of carburizing atmosphere simultaneously, and its adjusting situation is identical with carburizing agent.
4. operation stage shows and prompting: intensification exhaust, carburizing, diffusion, different process stage such as lower the temperature, come out of the stove are equipped with the display alarm prompting, in time remind the operator.
5. fault alarm: galvanic couple, stove silk have broken, and faults such as penetration enhancer obstruction are equipped with warning device.
6. the penetration enhancer amount of dripping is proofreaied and correct: whether carburizing agent and the rare-earth energizer amount of dripping be accurate, is provided with corrective system, and every stove all can be proofreaied and correct before carrying out carburization process if necessary.
7. but 18 kinds of re carburizing standard technologies of internal memory are provided with the correction factor button and can be evolved into hundreds of re carburizing technologies.But field modification or temporarily import technology.
8. the carburizing part distortion descends significantly, and performance such as wear resistance become bent tired, and contact fatigue life increases considerably, and economize on electricity is more than 20%.
Fig. 1 is the schematic diagram of the utility model instillation re carburizing computer control device.
Embodiment:
The logical organization principle of this device as shown in Figure 1.Controlled member: 1. cementing furnace temperature; 2. the penetration enhancer amount of dripping (carburizing agent and rare-earth energizer microcomputer control system by the strong micro-chip Inter8031 of immunity from interference, 8051 or 8098 and the design of necessary external interface circuit form.Necessary interference protection measure and power down protection have been taked.The processing parameter database of re carburizing (but 99 kinds of technologies of internal memory) in theory all is stored among the Eprom of microcomputer, therefrom takes out a kind of microsystem of sending into during work, and temperature and the penetration enhancer amount of dripping are controlled by the time program.
The temperature of cementing furnace shows and time variable control
The heating unit of cementing furnace is an electric stove wire, and the size of electric power is regulated by silicon controlled rectifier.The temperature of (see figure 1) cementing furnace was detected and sent into microcomputer and carburization process by thermopair design temperature compares, and when showing, silicon controlled conducting power is carried out PID and regulate by deviation delta T, thus the closed-loop control of formation cementing furnace temperature.As long as one time of the temperature program curve of a carburizing of taking-up in Eprom just can accurately be found by the closed loop feedback adjusting of microsystem, thereby guaranteed the accurate execution of carburization process process temperature program in cementation process.
The demonstration of penetration enhancer and time variable control
Carburizing process parameters is exactly penetration enhancer except that temperature, and it reaches flow respectively by a certain percentage for two kinds by carburizing agent (kerosene, acetone or Virahol) and rare-earth carburizer and splashes into (see figure 1) in the cementing furnace.The amount of the dripping control of penetration enhancer is made up of stepper-motor and lead screw gear, pump and stopping valve.Two overlap independently system, the another set of rare-earth energizer of then controlling of a cover control carburizing agent amount of dripping.Its control process is as follows: get a kind of required re carburizing technology in the re carburizing processing parameter database that Eprom stores, establishment has the different process stage (as exhaust in the technology, carbon potential is adjusted, blend diffusion by force) program of carburizing agent and the rare-earth carburizer amount of dripping, this giving decided program and sent instruction to microcomputer control system, lead screw gear is passed through in the rotation of control step motor, the piston forward translational speed of pump, thereby reach the purpose of the control penetration enhancer amount of dripping, because the volume of pump is limited, when piston moves to the penetration enhancer outlet, send signal by transmitter, stepper-motor reverses with the fastest speed of rotation, make the penetration enhancer that stores in the penetration enhancer case hold to go into pump rapidly, transmitter sends signal when piston reaches capacity the position, and stepper-motor was decided the program rotation by giving originally again, promoted piston and made penetration enhancer continue to splash in the stove.In order to realize replenishing of penetration enhancer, be provided with a pair of stopping valve in the pipeline, i.e. valve A and valve B.Two valves can not end simultaneously, also can not open simultaneously, and valve B closed when promptly valve A opened, otherwise valve A closes when valve B opens.Valve B opens and injects penetration enhancer in the Shi Xianglu, goes into penetration enhancer by the penetration enhancer bin to infusion when valve A opens.
By above-mentioned penetration enhancer to the cementing furnace injection process as can be known, the control of the penetration enhancer amount of dripping belongs to open loop control.Carbon Potential Inside Furnace transmitter and looped system are not set in the cementing furnace, thereby the precision of this open loop control, the reliability and the reasonableness of carburization process, be decided by fully whether the process software that stores among the Eprom is reliable.Microcomputer control system only reappears storing software strictly according to the facts.The re carburizing process software of this storage then is according to a large amount of process practices, and consider that some important factor in order (as cementing furnace volume and workpiece surface long-pending etc.) work out, to guarantee that at different carburizing equipments different workpieces and different dress can obtain excellent metallographic structure and high carburizing speed when cutting amount.
The topworks that the instillation system of penetration enhancer is adopted in the utility model is a ram pump, also can adopt miniature gears pump or vane pump or magnetic valve to do topworks, drive by direct-current machine, also can reach the control effect identical, but its control accuracy is not as good as ram pump with ram pump.
Once computer control device was used for certain Gear Factory heat treatment department, and had produced huge techno-economic effect: 1. the personnel of carburizing group reduce to 3 people by 5 people, and the equipment of keeping an eye on increases to 5 by 3; 2. the quality percentage of metallographic structure increases to more than 95% by original 30%; 3. average reducing power consumption 25%; 4. gear shifting quadrant texturing reduces, and qualification rate increases to more than 85% by 40%; 5. the cementing furnace mean time between maintenance (MTBM) extended to 6 months by 2 months; 6. the gear suspender life-span extended to half a year by 3 months.
This computer control device also once was used for the controlled conventional carburizing of existing instillation formula and made test run(s), and 930 ℃ of carburizing temperatures, carburizing agent are kerosene, and thinner is a methyl alcohol, the technology of on-the-spot input temporary establishment, and test-results has obtained gratifying result.
Claims (2)
1, instillation formula re carburizing computer control device, comprise that a database [5] with multiple re carburizing processing sequence and one are attached thereto the microcomputerized controller [6] that connects, it is characterized in that this device is made up of the open-loop control system of dripping speed and dripping amount that a closed loop temperature control loop that has a Temperature Feedback and can control carburizing agent and rare-earth energizer, closed loop temperature control loop is by microcomputerized controller [6], temperature digital display controller [8], temperature sensor [9], the loop that silicon controlled rectifier [10] and cementing furnace [13] are formed, dripping speed and dripping the amount open-loop control system is by microcomputerized controller [6], penetration enhancer digital display controller [7], stepper-motor [2], energizer liquid-storing box [11], carburizing agent liquid-storing box [12], lead screw gear [1], pump [3], the open loop system that stopping valve [4] and cementing furnace [13] constitute, wherein, microcomputerized controller [6] is connected with two stepper-motors [2] respectively by penetration enhancer digital display controller [7], the piston of stepper-motor [2] by lead screw gear [1] control pump [3], the oil cylinder of pump [3] by four stopping valve [4] respectively with energizer liquid-storing box [11], carburizing agent liquid-storing box [12] and cementing furnace [13] are communicated with.
2,, it is characterized in that described pump ［ 3 ］ is ram pump or toothed gear pump or vane pump or magnetic valve according to the described control device of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94205831 CN2212014Y (en) | 1994-03-30 | 1994-03-30 | Drop rare-earth carburization micro computer controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94205831 CN2212014Y (en) | 1994-03-30 | 1994-03-30 | Drop rare-earth carburization micro computer controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2212014Y true CN2212014Y (en) | 1995-11-08 |
Family
ID=33824653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94205831 Expired - Fee Related CN2212014Y (en) | 1994-03-30 | 1994-03-30 | Drop rare-earth carburization micro computer controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2212014Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373404A (en) * | 2011-10-25 | 2012-03-14 | 哈尔滨汇隆汽车箱桥有限公司 | Water-cooling anti-coking instilling and nitrogen blocking removing device of double-row rare earth gas carburizing furnace |
| CN106319435A (en) * | 2015-07-07 | 2017-01-11 | 财团法人金属工业研究发展中心 | Carburization heat treatment control method |
| CN109868446A (en) * | 2019-03-12 | 2019-06-11 | 陕西法士特齿轮有限责任公司 | A kind of carburizer auxiliary material control system and its control method |
-
1994
- 1994-03-30 CN CN 94205831 patent/CN2212014Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373404A (en) * | 2011-10-25 | 2012-03-14 | 哈尔滨汇隆汽车箱桥有限公司 | Water-cooling anti-coking instilling and nitrogen blocking removing device of double-row rare earth gas carburizing furnace |
| CN102373404B (en) * | 2011-10-25 | 2013-11-27 | 哈尔滨汇隆汽车箱桥有限公司 | Water-cooling anti-coking instilling and nitrogen blocking removing device of double-row rare earth gas carburizing furnace |
| CN106319435A (en) * | 2015-07-07 | 2017-01-11 | 财团法人金属工业研究发展中心 | Carburization heat treatment control method |
| CN109868446A (en) * | 2019-03-12 | 2019-06-11 | 陕西法士特齿轮有限责任公司 | A kind of carburizer auxiliary material control system and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |