CN103966404A - Direct resistance heating equipment applicable to heat treatment of slab metal specimen - Google Patents
Direct resistance heating equipment applicable to heat treatment of slab metal specimen Download PDFInfo
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- CN103966404A CN103966404A CN201410214136.2A CN201410214136A CN103966404A CN 103966404 A CN103966404 A CN 103966404A CN 201410214136 A CN201410214136 A CN 201410214136A CN 103966404 A CN103966404 A CN 103966404A
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Abstract
The invention provides direct resistance heating equipment applicable to heat treatment of a slab metal specimen. The direct resistance heating equipment applicable to heat treatment of the slab metal specimen comprises an insulation shell, a main body arranged inside the insulation shell and a control device, wherein the main body comprises a bottom plate, a fixed heating electrode fixed on the bottom plate, a sliding heating electrode, a sliding device fixed on the bottom plate and a tension device, wherein the sliding heating electrode is fixed on the sliding deice; the tension device is connected with the bottom of the sliding heating electrode; the control device comprises a transformer, a thermocouple, a data collection device, a computer control system, a gear selection module, a thyristor controller and a thyristor; the thermocouple, the data collection device, the computer control system, the gear selection module, the thyristor controller and the thyristor are sequentially connected; the thyristor is connected with a primary side of the transformer; and the secondary side of the transformer is respectively connected with the fixed heating electrode and the sliding heating electrode. The equipment supports a large specimen which is to be subjected to heat treatment, can effectively prevent deformation of a conductive specimen and has excellent temperature control accuracy, repeatability and heat preservation temperature accuracy and high in efficiency.
Description
Technical field
The invention belongs to Iron and Steel Production apparatus field, particularly a kind of heat treated direct resistance heating equipment of slab test button that is applicable to.
Background technology
The heat treatment experiment device research temperature of Iron and Steel Enterprises in China is controlled out of true, generally can only carry out air cooling, furnace cooling and shrend, cannot meet complexity, accurate cooling control requirement.And annealing is a kind of thermal treatment process to metallic substance, non-metallic material, refer to metal is slowly heated to certain temperature, keep enough time, then cooling with Reasonable Speed; Its objective is reduction hardness, improve machinability, eliminate unrelieved stress, stable dimensions, reduces distortion and crackle tendency, and crystal grain thinning, adjusts tissue, eliminates tissue defects.As can be seen here, annealing process has important impact to the final performance of product, by can effectively reducing product cost to the modeling effort of annealing process, optimizes annealing process, improves product performance.
At present aspect annealing experiment research, generally adopting heat treatment furnace, hot modeling test machine and special continuous annealing analog device both at home and abroad.Conventional Heat Treatment stove (as resistance furnace, salt bath furnace etc.) is one of the topmost equipment of the annealing experiment research of Iron and Steel Enterprises in China, its shortcoming is that speed of cooling is difficult to accurately control, generally air cooling, furnace cooling and shrend can only be carried out, complexity, accurate cooling control requirement cannot be met; And heat simulating tester Thermal Cycling is controlled better, weak point is that sample is little, can not carry out posterior drawing and deep-draw experiment, and another deficiency is to carry out the research of annealing process surface reaction aspect; And continuous annealing analog device needs the raw material of rolling, experimental cost is high, and the cycle is long, and processing parameter is adjusted dumb.
Summary of the invention
Goal of the invention: in order to overcome above-mentioned the deficiencies in the prior art, the object of the invention is to a kind of heat treated direct resistance heating equipment of slab test button that is applicable to.
Technical scheme: a kind of heat treated direct resistance heating equipment of slab test button that is applicable to provided by the invention, comprises insulation shell, is located at main body, control device in insulation shell; Described main body comprises base plate, be fixed on fixedly heating electrode, the heating electrode that slides on base plate, be fixed on carriage, tension device on base plate, described slip heating electrode is fixed on carriage, and described tension device is connected with slip heating electrode bottom; Control device comprises thermopair, data collector, computer control system, gear selection module, controllable silicon controller, the silicon controlled rectifier of transformer and connection successively, silicon controlled rectifier is connected with transformer primary side, and heating electrode, slip heating electrode are connected transformer secondary respectively with fixedly.
As improvement, insulation shell comprises box body, upper cover, is located at the high temperature insulation coating in housing and upper cover.
As another kind, improve, described box body comprises main cartridge and is set in parallel in the box body end gusset in main cartridge; Described upper cover comprises lid top panel, be located at press strip plate on lid top panel relative edge, be located at the handle at lid top panel top and be located at the lid gusset of lid top panel bottom.
As another kind, improve, described carriage comprises guide rail and the sliding surface bearing coordinating with guide rail, and described guide rail is fixed on base plate, and slip heating electrode is fixed on sliding surface bearing.
As another kind, improve, described tension device comprises screw rod, be socketed in spring on screw rod, be located at the nut of spring bottom.
Beneficial effect:
Particularly, with respect to prior art, there is following outstanding advantage:
1) than chamber type electric resistance furnace, direct resistance heating equipment provides a stable thermal environment for sheet metal sample, can realize accurate control holding temperature and time, heating and cooling speed, and its temperature control accuracy and repeatability are more excellent;
2) than chamber type electric resistance furnace, direct resistance heating equipment hardware system is detection system problem in time, is convenient to dismounting and maintenance; Software system are convenient to debugging and test problems, and software operation efficiency is high, travelling speed is fast;
3) than chamber type electric resistance furnace, direct resistance heating equipment automatic performance is better, does not need experimenter's hand-kept, can improve experiment accuracy, save experimental period, raise the efficiency;
4) than chamber type electric resistance furnace, direct resistance heating equipment has tension system, can effectively prevent the distortion of heat treatment sample, the sample preparation requirement of the microstructure that assurance heat treatment sample is follow-up and mechanics property analysis test.
Accompanying drawing explanation
Fig. 1 is the structural representation of upper cover.
Fig. 2 is the upward view of upper cover.
Fig. 3 is the structural representation of box body.
Fig. 4 is the structural representation of main body.
Fig. 5 is this device partial enlarged drawing.
Fig. 6 is control device structural representation.
Fig. 7 is the acquisition principle figure of data collector.
Fig. 8 is data collecting card AD both-end input method of attachment;
Fig. 9 is the signal method of attachment of data collecting card DA analog output;
Figure 10 is the signal method of attachment of data collecting card DO digital output;
Figure 11 is that gear is selected schematic circuit diagram under the automatic mode of module;
Figure 12 is the gear switch modular program block diagram that gear is selected module;
Figure 13 is that gear is selected 2v pilot circuit schematic diagram under the manual mode of module;
Figure 14 is controllable silicon controller schematic circuit diagram;
Figure 15 is the schematic diagram of temperature control and measurement system;
Figure 16 is data acquisition module schema;
Figure 17 is data acquisition module flow sheet;
Figure 18 is temperature control modules flow sheet;
When Figure 19 is chamber type electric resistance furnace insulation 5min, 14 revision test Actual Control Effect of Strong figure;
When Figure 20 is direct resistance heating equipment insulation 5min of the present invention, 7 revision test Actual Control Effect of Strong figure.
Embodiment
Below in conjunction with accompanying drawing, the present invention is made and being further illustrated.
Be applicable to the heat treated direct resistance heating equipment of slab test button, comprise insulation shell 1, be located at main body 2, control device 3 in insulation shell 1.
Described insulation shell 1, is shown in Fig. 1-3, comprises box body 11, upper cover 12, is located at the high temperature insulation coating in housing 11 and upper cover 12, and box body 11 comprises main cartridge 111 and is set in parallel in the box body end gusset 112 in main cartridge 111; Described upper cover 12 comprises lid top panel 121, be located at press strip plate 122 on lid top panel 121 relative edges, be located at the handle 123 at lid top panel 121 tops and be located at the lid gusset 124 of lid top panel bottom.
Described main body 2, see Fig. 4, comprise base plate 21, be fixed on fixedly heating electrode 22, slip heating electrode 23 on base plate 21, be fixed on carriage 24, tension device 25 on base plate 21, described slip heating electrode 23 is fixed on carriage 24, and described tension device 25 is connected with slip heating electrode 23 bottoms.Particularly, described carriage 24 comprises guide rail 241 and the sliding surface bearing 242 coordinating with guide rail 241, and described guide rail 241 is fixed on base plate 21, and slip heating electrode 23 is fixed on sliding surface bearing 242; Described tension device 25 comprises screw rod 251, be socketed in spring 252 on screw rod 251, be located at the nut 253 of spring 252 bottoms, screw rod 251 is connected with sliding electrode bottom, tension device utilization is connected to the screw rod 251 on electrode base slidably, on screw rod 251, overlap upper spring 252, then with 253 pairs of springs 252 of nut, compress, thereby sample 4 is added to load.
Fixedly heating electrode 22, slip heating electrode 23 are connected with copper bar 26, transition electrode 27 respectively, then are connected in transformer 37 two ends, see Fig. 5.Particularly, two output terminals of transformer 37 secondary coils are connected with transition electrode 27 respectively, transition electrode 27 passes through copper bar 26 with fixedly heating electrode 22, slip heating electrode 23 are connected, the two ends of sample (4), by tension device (25) and fixedly heating electrode 22, slip heating electrode 23 close contacts, form current circuit.
Control device 3, see Fig. 6, comprise transformer 37 and the thermopair 31 connecting successively, data collector 32, computer control system 33, gear selection module 34, controllable silicon controller 35, silicon controlled rectifier 36, silicon controlled rectifier 36 is connected with the former limit of transformer 37, and heating electrode 22, slip heating electrode 23 are connected transformer 37 secondary respectively with fixedly.Current transformer (38) is located on transformer 37 secondary circuits.
380v alternating-current by transformer (37) afterwards, transformer (37) changes 380V into 0-8V, with small voltage, be added in sample (4) two ends, and sample (4) is heated, thermopair (31) can be measured sample (4) temperature above in real time, by data collector 32, feed back in computer control system (33), by gear, select module (34) to calculate next output voltage constantly, by controlling the lead angle of controllable silicon controller (35), utilize silicon controlled rectifier (36) to regulate the number of turn of transformer (37) primary winding, thereby reach the effect of regulation and control secondary voltage, and then reach the object of Control Assay 4 temperature.The size of heating current is measured by current transformer (38).
More specifically, control device 3 provided by the invention, comprising:
One. data collector 32: refer to automatically gather non electrical quantity or electric quantity signal from the analog-and digital-unit under tests such as sensor and other Devices to test, deliver to and carry out analyzing and processing in upper computer.Signal collected electric current, voltage and the temperature of comprising, data collector through filtering, amplification, is delivered to A/D converter by the signal collecting, then sends into computer with digital quantity form, and its acquisition principle is shown in Fig. 7.
It is the PCI2006 of Altay company data collecting card that the present invention selects data collecting card.
This data collecting card various types of signal method of attachment: adopt both-end input mode, its connection is shown in shown in Fig. 8-10,16 road mimic input signals are just terminating to AI0-AI15 end, and its mimic input signal negative terminal is received AI16-AI31 end, field apparatus and PCI2006 plate common analog ground AGND.
The selection of each interface pin of PCI2006 data collecting card: this equipment requires 3 tunnel simulating signal inputs (electric current, voltage and temperature), 1 road analog signal output and the output of 4 railway digital signals altogether.Wherein, in order to improve immunity from interference, 3 tunnel simulating signal inputs adopt the mode of both-end input.The pin of PCI2006 data collecting card has 3, is respectively AD, DA analog input and output junctor 62 core D type plug CN1, DI digital quantity signal input connector P1 and DO digital quantity signal out connector P2.The pin of table 1 Wei Ge road signal electing.
Table 1 equipment is quoted pin number and function thereof
Two. gear is selected module 34:
Gear selects module (34) mainly by gear switch the electric circuit constitute.
In automatic mode, adopted relay circuit to realize similar function.Concrete scheme is to utilize the 0V/5V switching value signal of computer export to realize relay often to open the switching with normally closed pin, thereby controls the break-make of 220V circuit.Relay1 circuit principle as shown in figure 11.The electronic devices and components of wherein using have: diode IN4007S, triode 9013 (NPN), 10K resistance and HK4100F-DC5V-SHG rly..
The concrete flow sheet of gear switch module as shown in figure 12.By controlling the relay1 circuit of gear switch, can reach the object of control voltage gear for switching.Gear switch relay1 circuit is that the digital quantity signal (being DO2, DO4, DO6, DO8) of being exported by PCI2006 is controlled, in gear adjusting program, adopted single choice switch and construction of condition, having realized 4 digital quantity delivery ports can only have at most a limitation function of exporting 5V.
In manual master mode, take 2V pilot circuit as example, under other voltages, in like manner, see Figure 13.
Three. controllable silicon controller 35: see Figure 14.
Four. computer control system 33:
The realization of the software system of this computer control system 33 completes under LabVIEW platform.According to system function, system is divided into four modules: data acquisition module, gear are selected module, data processing module, data management module, and the function of each module is as shown in table 2.Controlling System adopts gear to select module parameter to adjust.Figure 15 is the schematic diagram of temperature control and measurement system, and the temperature signal that thermopair transmits passes to temperature transmitter, and then delivers to A/D converter.A/D converter converts the voltage detecting or current signal (analog quantity) to equivalent digital quantity that computer can be identified.These digital quantities are Output rusults after the particular procedure through computer, by D/A converter, becomes voltage or current signal, and delivering to topworks is silicon controlled rectifier.By regulating the opening degree of silicon controlled Trigger Angle, regulate the size of secondary coil voltage, reach the object of the size of current that regulates transformer secondary output coil, thus the variation of Control Assay temperature.
The function of each module of table 2
1) master routine and INTERFACE DESIGN: master routine mainly comprises 3 selection operations, set thermal treatment temp curve, start thermal treatment control and exit.Front panel top also has toolbar, and there is single step run button toolbar below, moves button, stop button and pause button continuously, this 4 programable operations of button and stopping.Heat treatment process mainly comprises 4 operation stepss, and the first step is to click continuous operation button, makes program operation continuously; Second step is to click thermal treatment temp curve, will jump out preset temp Curves Window, sets preset temp curve and sets the temperature of sheet metal sample with the relation of heat treatment time; The 3rd step is to click to start thermal treatment control button, and heat-treatment process interface will be jumped out, and selects after voltage gear, and heat treatment process just can start.In thermal treatment interface, in heat treatment process, can demonstrate the counting of the voltage and current size of sample, collection per second, actual temperature, preset temp, pid parameter, actual temperature curve and preset temp curve.The 4th step is to click exit button, exits thermal treatment control.After experiment finishes, system can be preserved the data in experiment automatically.In experimentation, can exit (time-out) thermal treatment control, click and exit (time-out) button.
2) data acquisition module: in the present invention, data acquisition module is mainly used in simulating signal importation.In capture program module, the temperature that the signal collecting is sample, voltage and current.Figure 16 is data acquisition module schema.Figure 17 is data acquisition module flow sheet.
3) data processing module: temperature control modules is a most important part in whole program, and this program kernel is partly pid algorithm, program also comprises setting picking rate, inputs pid parameter, is written into the functions such as preset temp.The temperature collecting, voltage and current, through a series of computing, can obtain next step output voltage.Program realizes by conditional statement.Figure 18 is temperature control modules flow sheet.
4) data management module: data management module comprises the input of preset temp and the storage of data.The input of preset temp is sets thermal treatment temp curve, is the heat treated the first step, and data memory module is mainly realized the storage of data in test process.Preset temp input is for equipment user input preset temp-time curve, and its basic function having has: pointwise input, removing, default curve are preserved, excel file imports.Patent is selected the event structure in LabVIEW, each function correspondence an event in time structure, after the button that has clicked corresponding function, just proceed in corresponding program.In this patent, require time, temperature data to store to facilitate follow-up data analysis.LabVIEW can read and write text, data list file, binary file and test data file.In LabVIEW, have very abundant file operation function library, this program of read-write operation that can carry out easily file writes electrical form control with regard to utilization and has realized this function.
Experimentation carries out as follows: thermopair is installed and---to sample, is applied tension force and---add incubation chamber upper cover and---open experimental installation and---select pattern manually or automatically and---start heating and---be incubated the Performance Detection of---cooling---sheet metal sample.
Sample 4 utilizes large current low voltage transformer 37 to carry out resistive heating.In sample when heating energising,, himself resistance heating, raises its temperature.Meanwhile, sample also will carry out heat exchange in modes such as radiation, convection current and heat conduction with surrounding environment and water flowing welding handle, produces calorific loss.Steady-state heat balance calculating formula is
P
elec＝P
rad+P
conv+P
cond
Wherein, the electric power that electric current produces by sample is Pelec, and heat loss through radiation is Prad, and Natural Heat Convection is Pconv, and the thermal conduction of sample and water cooled electrode pressure holding part is Pcond.In conjunction with the specification of laboratory practical situation and laboratory common used material, finally determine that the rated output of transformer is: 50kw, voltage gear is divided into 2V, 4V, 6V, 8V.
Use common low carbon Low Alloy Steel Plate, the long * of sheet metal sample wide (20cm*8cm).Sheet metal sample is at 800 ℃ of insulation 5min, and the point of sheet metal sample middle of take is benchmark, has measured this locational temperature of sheet metal sample.Shown in Figure 19,20, be respectively repeatedly revision test chamber type electric resistance furnace and present device insulation 5min Actual Control Effect of Strong figure, wherein Figure 19 (a) is the 1-7 time revision test result of chamber type electric resistance furnace, Figure 19 (b) is the 8-14 time revision test result of chamber type electric resistance furnace, Figure 20 (a) is the 1-4 time revision test result of present device, and Figure 20 (b) is the 5-7 time revision test result of present device.Experimental result shows, chamber type electric resistance furnace temperature control poor accuracy, and between soak, the temperature difference is less than 10 ℃, poor reproducibility; Present device can accurate temperature controlling, and effective, and between soak, the temperature difference is less than 3 ℃, favorable reproducibility.
Claims (5)
1. be applicable to the heat treated direct resistance heating equipment of slab test button, it is characterized in that: comprise insulation shell (1), be located at main body (2), control device (3) in insulation shell (1); Described main body (2) comprises base plate (21), be fixed on fixedly heating electrode (22), slip heating electrode (23) on base plate (21), be fixed on carriage (24), tension device (25) on base plate (21), it is upper that described slip heating electrode (23) is fixed on carriage (24), and described tension device (25) is connected with slip heating electrode (23) bottom; Control device (3) comprises thermopair (31), data collector (32), computer control system (33), gear selection module (34), controllable silicon controller (35), the silicon controlled rectifier (36) of transformer (37) and connection successively, silicon controlled rectifier (36) is connected with the former limit of transformer (37), and heating electrode (22), slip heating electrode (23) are connected transformer (37) secondary respectively with fixedly.
2. a kind of heat treated direct resistance heating equipment of slab test button that is applicable to according to claim 1, is characterized in that: insulation shell (1) comprises box body (11), upper cover (12), is located at the high temperature insulation coating in housing (11) and upper cover (12).
3. a kind of heat treated direct resistance heating equipment of slab test button that is applicable to according to claim 2, is characterized in that: described box body (11) comprises main cartridge (111) and is set in parallel in the box body end gusset (112) in main cartridge (111); Described upper cover (12) comprises lid top panel (121), be located at press strip plate (122) on lid top panel (121) relative edge, be located at the handle (123) at lid top panel (121) top and be located at the lid gusset (124) of lid top panel bottom.
4. a kind of heat treated direct resistance heating equipment of slab test button that is applicable to according to claim 1, it is characterized in that: described carriage (24) comprises guide rail (241) and the sliding surface bearing (242) coordinating with guide rail (241), it is upper that described guide rail (241) is fixed on base plate (21), and slip heating electrode (23) is fixed on sliding surface bearing (242).
5. a kind of heat treated direct resistance heating equipment of slab test button that is applicable to according to claim 1, is characterized in that: described tension device (25) comprises screw rod (251), be socketed in spring (252) on screw rod (251), be located at the nut (253) of spring (252) bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410214136.2A CN103966404A (en) | 2014-05-20 | 2014-05-20 | Direct resistance heating equipment applicable to heat treatment of slab metal specimen |
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| CN201410214136.2A CN103966404A (en) | 2014-05-20 | 2014-05-20 | Direct resistance heating equipment applicable to heat treatment of slab metal specimen |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103296A (en) * | 2018-02-08 | 2018-06-01 | 中南大学 | A kind of device for pulse current assistant metal component solution heat treatment |
| CN108588377A (en) * | 2018-06-21 | 2018-09-28 | 滁州硕燊机械制造有限公司 | A kind of stabiliser bar heated by electrodes method |
| CN108796182A (en) * | 2018-06-21 | 2018-11-13 | 滁州硕燊机械制造有限公司 | A kind of heated by electrodes equipment of stabiliser bar |
| CN108834239A (en) * | 2018-06-21 | 2018-11-16 | 滁州硕燊机械制造有限公司 | A kind of stabiliser bar heated by electrodes equipment with anti-distortion mechanism |
| CN108848590A (en) * | 2018-06-21 | 2018-11-20 | 滁州硕燊机械制造有限公司 | A kind of stabiliser bar heated by electrodes equipment with cooling system |
| CN108838240A (en) * | 2018-05-15 | 2018-11-20 | 上海治臻新能源装备有限公司 | A kind of the shaping processing method and its shaping processing unit (plant) of metal double polar plates welding warpage |
| CN108913857A (en) * | 2018-06-21 | 2018-11-30 | 滁州硕燊机械制造有限公司 | A kind of heating electrode of the heated by electrodes equipment of stabiliser bar |
| CN109022739A (en) * | 2018-06-21 | 2018-12-18 | 滁州硕燊机械制造有限公司 | A kind of fixed heating electrode of the heated by electrodes equipment of stabiliser bar |
| CN109070172A (en) * | 2016-02-04 | 2018-12-21 | 奥钢联钢铁有限责任公司 | For producing the equipment and method for curing of hardening steel components |
| CN109082511A (en) * | 2018-06-21 | 2018-12-25 | 滁州硕燊机械制造有限公司 | A kind of stabiliser bar heated by electrodes equipment with supporting device |
| US10989575B1 (en) | 2020-09-08 | 2021-04-27 | King Abdulaziz University | Multifunctional pressure, displacement and temperature gradient sensor |
| CN113502472A (en) * | 2021-07-09 | 2021-10-15 | 东南大学 | Cladding equipment and cladding method for continuous isothermal gradient cladding of steel rail surface |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109070172A (en) * | 2016-02-04 | 2018-12-21 | 奥钢联钢铁有限责任公司 | For producing the equipment and method for curing of hardening steel components |
| CN108103296A (en) * | 2018-02-08 | 2018-06-01 | 中南大学 | A kind of device for pulse current assistant metal component solution heat treatment |
| CN108838240A (en) * | 2018-05-15 | 2018-11-20 | 上海治臻新能源装备有限公司 | A kind of the shaping processing method and its shaping processing unit (plant) of metal double polar plates welding warpage |
| CN108588377A (en) * | 2018-06-21 | 2018-09-28 | 滁州硕燊机械制造有限公司 | A kind of stabiliser bar heated by electrodes method |
| CN108796182A (en) * | 2018-06-21 | 2018-11-13 | 滁州硕燊机械制造有限公司 | A kind of heated by electrodes equipment of stabiliser bar |
| CN108834239A (en) * | 2018-06-21 | 2018-11-16 | 滁州硕燊机械制造有限公司 | A kind of stabiliser bar heated by electrodes equipment with anti-distortion mechanism |
| CN108848590A (en) * | 2018-06-21 | 2018-11-20 | 滁州硕燊机械制造有限公司 | A kind of stabiliser bar heated by electrodes equipment with cooling system |
| CN108913857A (en) * | 2018-06-21 | 2018-11-30 | 滁州硕燊机械制造有限公司 | A kind of heating electrode of the heated by electrodes equipment of stabiliser bar |
| CN109022739A (en) * | 2018-06-21 | 2018-12-18 | 滁州硕燊机械制造有限公司 | A kind of fixed heating electrode of the heated by electrodes equipment of stabiliser bar |
| CN109082511A (en) * | 2018-06-21 | 2018-12-25 | 滁州硕燊机械制造有限公司 | A kind of stabiliser bar heated by electrodes equipment with supporting device |
| US10989575B1 (en) | 2020-09-08 | 2021-04-27 | King Abdulaziz University | Multifunctional pressure, displacement and temperature gradient sensor |
| CN113502472A (en) * | 2021-07-09 | 2021-10-15 | 东南大学 | Cladding equipment and cladding method for continuous isothermal gradient cladding of steel rail surface |
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Application publication date: 20140806 |