CN1285752C - Intermediate frequency inductive carburizing furnace - Google Patents
Intermediate frequency inductive carburizing furnace Download PDFInfo
- Publication number
- CN1285752C CN1285752C CN 03134459 CN03134459A CN1285752C CN 1285752 C CN1285752 C CN 1285752C CN 03134459 CN03134459 CN 03134459 CN 03134459 A CN03134459 A CN 03134459A CN 1285752 C CN1285752 C CN 1285752C
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- CN
- China
- Prior art keywords
- muffle tank
- carburizing
- inductor block
- furnace
- frequency induction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The present invention relates to an intermediate frequency induction carburizing furnace which reserves a carburizing device, a muffle tank, a gas current stirring fan, a motor and an outer casing of a carburizing furnace in the prior art, wherein a heat-insulating layer is arranged outside the muffle tank; an inductor is arranged outside the heat-insulating layer, arranged on a fixed frame and connected with a power supply by an externally connected copper bar; a temperature detection head in contact with the muffle tank is arranged outside the muffle tank and connected with a control system by an externally connected conducting wire. The present invention solves the technical problems of low work efficiency, high production cost and short service life of the background art, greatly reduces thermal pollution of the surrounding environment of electric furnace work and has the advantages of good carburizing effect, convenient automatic control, energy saving and time saving.
Description
Technical field
The present invention relates to a kind of Medium frequency induction cementing furnace.
Background technology
Advantages such as Medium frequency induction adopts the semiconducter device thyratron transistor, and it has, and capacity is big, efficient is high, control characteristic is good, the life-span is long, pollution-free.The basic application of power semiconductor device is the control of the rectification, copped wave, frequency conversion, switch to electric energy etc., is the bridge between light current control and the controlled forceful electric power.Inversion and frequency conversion are to utilize thyristor characteristics, become alternative process to become inversion DC converting, if direct current is transformed into the alternating-current of 50Hz, and direct current energy fed back to AC network, this inversion is an active inversion, and the alternating-current that the alternating-current of electrical network is become the frequency adjustable size calls frequency conversion.The frequency conversion electric current has been widely used in ac motor speed control, and intermediate frequency is made heating of metal melting etc.
The heat treatment well type cementing furnace that adopts both at home and abroad is a resistance-type heating principle at present, and its shortcoming is as follows:
1. energy utilization rate is low, and domestic only is about 30%, abroad is about 36%;
2. empty stove heats up and has the material heat tracing time long.Because of coefficient of expansion differences such as refractory materials, muffle tank, stove silk in the stove, sharply heat up and cause its cracking, heating needs more than 900 minutes so electric furnace heats up; There is the material heat tracing also to need 60-600 minute, power consumption and consuming time;
3. the surrounding enviroment temperature of electric furnace work is very high, and the staff can only do of short duration delay betwixt; This high environment also causes thermal pollution to the place, forms unsafe factor;
4. to needing the part long-time heating of carburizing, cause the part decarburization, then part just needs the carburizing of longer time, just can reach the carburizing requirement, causes inefficiency;
5. electric stove wire generally adopts longer nichrome wire in work-ing life, and working life is still shorter, and need change the stove silk average per June No. one time, and every replacing once not only will stop production, and nearly ten thousand yuan of expenses; Cementing furnace is also shorter work-ing life, and need build stove again once every year.It all makes operation, maintenance cost increase;
6. the speed of response of electric stove wire temperature variation is slow, poor controllability, and control accuracy is low, and homemade cementing furnace control accuracy only is ± 5 ℃.
Summary of the invention
The invention solves the background technology inefficiency, production cost height, the technical problem that work-ing life is short.
Technical solution of the present invention is:
A kind of Medium frequency induction cementing furnace, comprise cementing plant 13, muffle tank 4, air-flow agitation fan 8, motor 9 and cementing furnace shell 5, the outer setting of described muffle tank 4 has thermal insulation layer 3, its special character is: the outer setting of described thermal insulation layer 3 has inductor block 2, this inductor block 2 is arranged on the anchor 1, and joins with power supply by external copper bar 7; The outer setting of described muffle tank 4 has contacted with it temperature detecting head 6, and this detection head 6 is by external wire 11 connected control systems 12.
Above-mentioned inductor block 2 is good with the hollow inductor block that adopts hollow, and the water-circulating pipe 10 with the external water circulation system connectivity can be set in inductor block 2 hollow.
Above-mentioned detection head 6 can adopt thermopair.
The present invention has following advantage:
1. economize on electricity.Utilization rate of electrical height, thermo-efficiency can reach more than 60%, and power factor (PF) can reach 90%;
2. save time.It is 40 minutes/stove with equipower the time that empty stove heats up, and has material heat tracing, samming to be no more than 60 minutes/stove; The heated object of cementing furnace is a muffle tank only, and material is single, can be rapidly heated, and is energy-conservation and save time; It is calculated as follows:
JP＝0.165·t·G/0.24·n·P
Wherein, t=temperature ℃;
It is kg that G=adds temperature;
N=material efficiency coefficient 0.6;
JP=beat/second;
P=power;
Beat=0.165950 ℃ 225kg/0.240.6100kw=2315.62 second, approximate 38.59 minutes/stove.
3. owing to the skin effect in intermediate frequency magnetic field, heat to other direction diffusion, can significantly not reduce the thermal pollution of electric furnace work week surrounding environment;
4. rapid heating can make metallic particles expand rapidly, helps carburizing, and carburizing is effective, and can reduce decarburization, high efficiency;
5. employing Frequency Induction Heating has significantly reduced and has repaiied furnaceman's work, and service life of equipment is long; Need not to build again stove, operation, maintenance cost is low;
6. adopt intermediate frequency semi-conductor power supply, permanent power technology and fast increase and decrease voltage satisfy cementing furnace working temperature accuracy requirement, can improve the furnace temperature precision greatly, the furnace temperature precision can reach ± 1.5 ℃; Controllability is strong, is convenient to automatic control.
The drawing explanation:
Accompanying drawing is a structural representation of the present invention.
Drawing reference numeral explanation: 1-anchor, 2-inductor block, 3-thermal insulation layer, 4-muffle tank, 5-shell, 6-temperature detecting head, the external copper bar of 7-, 8-fan, 9-motor, 10-water-circulating pipe, 11-external wire, 12-Controlling System, 13-cementing plant.
Embodiment
Referring to accompanying drawing, the present invention has kept cementing plant 13 of the prior art, muffle tank 4, air-flow agitation fan 8 and motor 9 and cementing furnace shell 5.Muffle tank 4 outer setting have thermal insulation layer 3, and thermal insulation layer 3 outer setting have inductor block 2, and inductor block 2 is arranged on the anchor 1, and join with power supply by external copper bar 7.Muffle tank 4 outer setting have contacted with it temperature detecting head 6, and this detection head 6 is by external wire 11 connected control systems 12.Inductor block 2 is good with the hollow inductor block that adopts hollow, and the water-circulating pipe 10 with the external water circulation system connectivity can be set in inductor block 2 hollow, so that inductor block 2 self temperature is unlikely too high.Detection head 6 specifically can adopt thermopair.
The present invention adopts inductive heating principle, has replaced insulating brick in traditional heating electric stove wire and the stove with inductor block 2.Send electrical network to inductor block 2 after the inversion rectification by intermediate frequency power supply, press predefined frequency and power generation magnetic field through the inductor block of strictness design, calculating, magnetic line of force is worn and is cut muffle tank 4 generation eddy current.The skin effect of magnetic line of force can be guaranteed the single direction that heats.Inductor block 2 produces the high speed heat energy, and Controlling System 12 is pressed the automatic regulating voltage of design temperature, guaranteeing the precision of temperature, and the actual temperature that temperature detecting head 6 is measured is fed back to Controlling System 12, and muffle tank 4 can be heated to temperature rating rapidly.Can realize temperature auto control and demonstration by Controlling System 12.Class produces, class's traceable printing of amount is searched analysis for managerial personnel.And carry out the automatic control of heating and heat preservation by the fabrication technique requirement.
Claims (3)
1. Medium frequency induction cementing furnace, comprise cementing plant (13), muffle tank (4), air-flow agitation fan (8), motor (9) and cementing furnace shell (5), the outer setting of described muffle tank (4) has thermal insulation layer (3), it is characterized in that: the outer setting of described thermal insulation layer (3) has inductor block (2), this inductor block (2) is arranged on the anchor (1), and joins by external copper bar (7) and power supply; The outer setting of described muffle tank (4) has contacted with it temperature detecting head (6), and this detection head (6) is by external wire (11) connected control system (12).
2. Medium frequency induction cementing furnace as claimed in claim 1 is characterized in that: described inductor block (2) is the hollow inductor block of hollow, is provided with the water-circulating pipe (10) with the external water circulation system connectivity in it is hollow.
3. Medium frequency induction cementing furnace as claimed in claim 1 or 2 is characterized in that: described detection head (6) is a thermopair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134459 CN1285752C (en) | 2003-07-25 | 2003-07-25 | Intermediate frequency inductive carburizing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134459 CN1285752C (en) | 2003-07-25 | 2003-07-25 | Intermediate frequency inductive carburizing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1570193A CN1570193A (en) | 2005-01-26 |
| CN1285752C true CN1285752C (en) | 2006-11-22 |
Family
ID=34470198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03134459 Expired - Fee Related CN1285752C (en) | 2003-07-25 | 2003-07-25 | Intermediate frequency inductive carburizing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1285752C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788225A (en) * | 2010-03-06 | 2010-07-28 | 洛阳市西格马仪器制造有限公司 | Ultrahigh temperature heating furnace |
| CN107557727A (en) * | 2016-06-30 | 2018-01-09 | 湖北凯昌光电科技有限公司 | A kind of new high-temperature carburizing equipment |
| CN106868445A (en) * | 2017-04-14 | 2017-06-20 | 贵州师范大学 | A kind of dipulse rapid nitridation method and device based on sensing heating |
| CN114807826A (en) * | 2022-02-08 | 2022-07-29 | 马雅盛 | Medium frequency induction carburizing furnace |
-
2003
- 2003-07-25 CN CN 03134459 patent/CN1285752C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1570193A (en) | 2005-01-26 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061122 |