CN1317400C - Energy control device of medium and high frepuency induction quenching - Google Patents
Energy control device of medium and high frepuency induction quenching Download PDFInfo
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- CN1317400C CN1317400C CNB031283942A CN03128394A CN1317400C CN 1317400 C CN1317400 C CN 1317400C CN B031283942 A CNB031283942 A CN B031283942A CN 03128394 A CN03128394 A CN 03128394A CN 1317400 C CN1317400 C CN 1317400C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention relates to an energy control device of medium-and-high frequency induction quenching, which is characterized in that the device is composed of a single chip computer controller, an induction heater, a heating current detector, a heating voltage detector, a high-frequency amplifier and a digital-to-analog converter which are connected by circuits, wherein a single chip computer controls the output voltage of a medium-and-high frequency quenching power supply by an interface circuit. The control device adopted can timely detect the quenching voltage, the quenching current and the phase angle of an inductor in the quenching process, calculate the instantaneous effective power of the inductor and adjust the output voltage according to the phase angle of the inductor; the surface temperature rising speed rate, the maximum surface temperature value and the highest-temperature area retaining time of a quenching part are technologically controlled. Thereby, the quenching layer depth and the quenching hardness which are technologically required are achieved. The present invention reduces influences caused by fine changes of the surface of the part.
Description
Technical field: the present invention relates to the induction hardened energy of a kind of medium-high frequency amount control device.
Background technology: the method that should quench with high frequency impression improves the piece surface mechanical property and has early arrived in industry and use widely.It is frequency, the voltage and current of determining quenching according to the material and the geometrical shape of part that common high frequency is experienced the technology that should quench, obtains quench accordingly layer depth and hardness heat-up time by adjusting again, satisfies the mechanical property requirement.Also have by measuring energy that volts DS, electric current calculate heating and control heating.Because in quenching process, power factor changes, and it is differentiated calculating between the energy of heating and the actual quenching energy by measurement volts DS, rheometer.In quenching process, part is when just beginning to heat, and temperature is low, and surface resistivity is little, and power factor is low, and active power is little.Along with the prolongation of heat-up time, the piece surface temperature raises, and the surface electrical resistive is big, and power factor improves, and it is big that active power also becomes.After temperature reaches the quenching required value, again through one section penetration time, cut off heating power supply, cool off part rapidly.After heater voltage and frequency fixing, the length of heat-up time has just been determined the layer depth and the hardness of quenching.Because the slight change of individual material of part and surface geometry switch usually causes the variation of hardened depth, quenching hardness.
Summary of the invention: the present invention usually causes hardened depth for the slight change that solves individual material of in existing medium-high frequency induction quenching part and morphology, the problem of the variation of quenching hardness, the induction hardened energy of a kind of medium-high frequency amount control device is proposed, it is characterized in that: described device is by singlechip controller, induction heater, the heating current detector, the heater voltage detector, radio-frequency amplifier, digital to analog converter is formed, described singlechip controller is connected between digital to analog converter and the medium-high frequency quenching power supply, medium-high frequency quenching power supply connects induction heater and built-up circuit loop, the heating current detector is connected in the described circuit loop, the heater voltage detector is connected in parallel in the described circuit loop, the heating current detector all is connected with radio-frequency amplifier with the heater voltage detector and all respectively has one tunnel output to be connected to digital to analog converter, and radio-frequency amplifier connects described digital to analog converter simultaneously.
A kind of concrete technical scheme of the present invention is: the circuit of described control device is that comparer monitors the input termination alternating-current INV of input power phase circuit and the VCC of system power supply, and comparer monitors that the output terminal of input power phase circuit connects the signal input part of micro-chip; The signal output part of micro-chip connects snubber, and snubber connects high frequency electric source again; High-frequency voltage divides two-way behind voltage sensor, one road circuit is to connect behind first resistance, first diode polyphone by the be connected in parallel filter rectifier formed and be connected with A/D converter of first electric capacity, second resistance again; Three resistance of another Lu Jingdi enter radio-frequency amplifier; Electric current is through being divided into two-way behind the current sensor: the one tunnel is to connect after the 4th resistance, second diode serial connection by the be connected in parallel filter rectifier formed and be connected with A/D converter of second electric capacity, the 7th resistance again; Another road connects described radio-frequency amplifier, and the output terminal of radio-frequency amplifier is connected with A/D converter behind the 3rd diode and the filter rectifier of forming that is connected in parallel by the 3rd electric capacity, the 6th resistance successively; Anodal port of two power supply signal access interface of described radio-frequency amplifier and negative pole port difference connected system power supply-12V ,+the 12V electrode; Between the delivery port of the radio-frequency amplifier input aperture at described the 3rd resistance place and radio-frequency amplifier input aperture, be connected with the 5th resistance of enlargement ratio.
Adopt this control device, in quenching process, can detect extinction voltage, electric current and the phasing degree thereof of inductor block in good time, calculate its instantaneous active power, and according to its phasing degree adjustment output voltage, because speed, surface temperature maximum and highest temperature zone tenure that skill control quench part surface temperature rises.Thereby reach the quenching layer depth and the quenching hardness that require on the technology.Reduce because the influence that slight change caused of piece surface.
Description of drawings: Fig. 1 is the structural representation of the induction hardened energy of medium-high frequency of the present invention amount control device;
Fig. 2 is the vector diagram of the heating piezoelectricity stream of the induction hardened energy of medium-high frequency of the present invention amount control device;
Fig. 3 is the schematic circuit diagram of the induction hardened energy of medium-high frequency of the present invention amount control device.
Embodiment: as shown in Figure 1, this medium-high frequency is induction hardened can be made up of medium-high frequency quenching power supply 1, induction heater 2, heating current detector 3, heater voltage detector 4, radio-frequency amplifier 5, digital to analog converter 6 by amount control device, each part mentioned above connects by circuit, by the output voltage of singlechip controller 7 by circuit control medium-high frequency quenching power supply 1, induction heater 2 is by induction heater direct heating part; Heating current detector 3 can detect the waveform of ratio-frequency heating electric current; Heater voltage detector 4 can detect the waveform of ratio-frequency heating voltage.Singlechip controller 7 has demonstration and operation control panel.Circuit theory as shown in Figure 3, in the single chip machine controlling circuit micro-chip U1 control 3 the tunnel input: liquid-crystal display display, crystal oscillator CR, button A, wherein button A has 17, comprises 10 numerical keys, 6 function keys and a reset key.System power supply B has+12V ,-12V, VCC (+5V) three interfaces.Exchange 15 volts of input voltages through resistance R 1 input, the comparer of forming through resistance R 1, R2, R5 and comparer U2 monitors input power phase circuit, enter micro-chip U1, for micro-chip U1 control high frequency electric source provides time reference: on the VCC of the pin 8 welding system power supply B of comparer U2, enter micro-chip U1 by the pull-up resistor R5 that is connected on the VCC power supply at the pin 7 of comparer U2.The output signal of micro-chip U1 is through the amplitude and the heat-up time of the heater voltage of snubber U3 control high frequency electric source 1, and this signal can be an analog quantity, also can be digital quantity, perhaps tripping pulse, requirement according to high frequency electric source is determined, is selected by function key, is finished by software.Transmodulator U4 is 12 A/D converters with 11 tunnel inputs in the D/A converting circuit.Only used 3 tunnel inputs in this circuit, its work is controlled by micro-chip U1.Wherein microcontroller system circuit and A/D change-over circuit can have various ways, also can use the micro-chip that has the A/D conversion port.
The output of current sensor is divided into two-way in the heating current testing circuit: the one tunnel sends into high-frequency amplifier circuit, and one the tunnel through resistance R 3, diode D1, and capacitor C 6, resistance R 4 enter transmodulator U4 and carry out the A/D conversion.The effect of this circuit is to get its peak value, therefore selects appropriate time constant by said elements.
The principle of heater voltage testing circuit and heating current testing circuit are similar.The radio-frequency amplifier AU of high-frequency amplifier circuit will carry out that addition amplifies from the signal of voltage sensor and current sensor after diode D3, electric capacity AC2, resistance AR4 send into transmodulator U4 and carry out the A/D conversion.The effect of diode D3, electric capacity AC2, resistance AR4 and diode D1, capacitor C 6, resistance R 4 are identical.4 mouthfuls, the 7 mouthfuls difference welding system power supply B of radio-frequency amplifier AU-12V ,+the 12V power supply; Series resistance AR3 between 2,6 mouthfuls of radio-frequency amplifier AU.High frequency electric source behind resistance R 6, diode D2, capacitor C 7, resistance R 7 filter rectifications enter transmodulator U4.
As shown in Figure 1, the voltage and current of induction heater 2 is detected by voltage-level detector 4 and amperometric 3 respectively, and same feeding into radio-frequency amplifier 5 amplified, relevant by the signal amplitude after radio-frequency amplifier 5 amplifications with voltage, electric current and the phasing degree thereof of input, relation exists corresponding relation between the signal S after voltage U, electric current I, radio-frequency amplifier amplify as shown in Figure 2.AB represents voltage U among the figure, and AC represents electric current I, and angle ∠ CAB is the phasing degree between electric current and voltage.AD represents the signal S after electric current and voltage amplify through amplifier 5.Fig. 2 is a parallelogram, by measure 1, the amplitude of U, S, can calculate the power factor of heating piezoelectricity stream, power, energy easily.Voltage U, electric current I and phase signal S send into digital to analog converter 6 and carry out digital-to-analog conversion.Singlechip controller 7 detects voltage U, electric current I and phase signal S amplitude respectively.Utilize law of cosines can calculate power factor and active power thereof very soon.And according to the output voltage values of technique initialization control high-frequency quenching power supply.So that with best heating power curve heating quenching part.Detect extinction voltage, electric current and the phasing degree thereof of inductor block, i.e. power factor is calculated its active power moment, and adjusts output voltage according to its phasing degree in good time, and the control useful output is promptly controlled speed and the highest quenching temperature that the parts quenching temperature rises.When reaching prescribed value, the energy that quenches stops heating.Just in whole heat-processed, the energy of voltage, electric current and quenching that the high frequency sense is quenched can be subjected to technology controlling and process, can be by speed, surface temperature maximum and the highest temperature zone tenure of technology controlling and process quench part surface temperature rising, thereby reach the quenching layer depth and the quenching hardness that require on the technology, reduce because the influence that slight change caused of piece surface.
Claims (2)
1, the induction hardened energy of a kind of medium-high frequency amount control device, it is characterized in that: described device is by singlechip controller, induction heater, the heating current detector, the heater voltage detector, radio-frequency amplifier, digital to analog converter is formed, described singlechip controller is connected between digital to analog converter and the medium-high frequency quenching power supply, medium-high frequency quenching power supply connects induction heater and built-up circuit loop, the heating current detector is connected in the described circuit loop, the heater voltage detector is connected in parallel in the described circuit loop, the heating current detector all is connected with radio-frequency amplifier with the heater voltage detector and all respectively has one tunnel output to be connected to digital to analog converter, and radio-frequency amplifier connects described digital to analog converter simultaneously.
2, the induction hardened energy of medium-high frequency as claimed in claim 1 amount control device, it is characterized in that: the circuit of described control device is that comparer monitors the input termination alternating-current INV of input power phase circuit (CR) and the VCC of system power supply (B), and comparer monitors that the output terminal of input power phase circuit (CR) connects the signal input part of micro-chip (U1); The signal output part of micro-chip (U1) connects snubber (U3), and snubber (U3) connects high frequency electric source (1) again; High-frequency voltage divides two-way behind voltage sensor, one road circuit is to connect behind first resistance (R6), first diode (D2) polyphone by the be connected in parallel filter rectifier formed and be connected with A/D converter (U4) of first electric capacity (C7), second resistance (R7) again; Three resistance of another Lu Jingdi (AR2) enter radio-frequency amplifier; Electric current is through being divided into two-way behind the current sensor: the one tunnel is to connect after the 4th resistance (R3), second diode (D1) serial connection by the be connected in parallel filter rectifier formed and be connected with A/D converter (U4) of second electric capacity (C6), the 7th resistance (R4) again; Another road connects described radio-frequency amplifier, and the output terminal of radio-frequency amplifier is connected with A/D converter (U4) behind the 3rd diode (D3) and the filter rectifier of forming that is connected in parallel by the 3rd electric capacity (AC2), the 6th resistance (AR4) successively; Anodal port (7) of two power supply signal access interface of described radio-frequency amplifier and negative pole port (4) difference connected system power supply (B)-12V ,+the 12V electrode; Between the delivery port of the radio-frequency amplifier input aperture at described the 3rd resistance (AR2) place and radio-frequency amplifier input aperture, be connected with the 5th resistance (AR3) of enlargement ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031283942A CN1317400C (en) | 2003-07-25 | 2003-07-25 | Energy control device of medium and high frepuency induction quenching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031283942A CN1317400C (en) | 2003-07-25 | 2003-07-25 | Energy control device of medium and high frepuency induction quenching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1514027A CN1514027A (en) | 2004-07-21 |
| CN1317400C true CN1317400C (en) | 2007-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031283942A Expired - Lifetime CN1317400C (en) | 2003-07-25 | 2003-07-25 | Energy control device of medium and high frepuency induction quenching |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101802229B (en) * | 2007-09-13 | 2012-05-23 | 高周波热炼株式会社 | High-frequency hardening monitor device |
| CN102356167B (en) * | 2009-03-12 | 2014-08-27 | 高周波热炼株式会社 | Management system for high frequency quenching |
| CN103388065B (en) * | 2012-05-10 | 2014-12-24 | 宝山钢铁股份有限公司 | Large-diameter support roller integral induction heating system and control method thereof |
| CN104834268B (en) * | 2015-04-10 | 2017-11-07 | 湖北汽车工业学院 | The high-power quenching Digit Control Machine Tool energy parameter of superaudio and technological parameter managing device |
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2003
- 2003-07-25 CN CNB031283942A patent/CN1317400C/en not_active Expired - Lifetime
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