CN2528562Y - Continuous casting billet cutting controller - Google Patents
Continuous casting billet cutting controller Download PDFInfo
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- CN2528562Y CN2528562Y CN 01279383 CN01279383U CN2528562Y CN 2528562 Y CN2528562 Y CN 2528562Y CN 01279383 CN01279383 CN 01279383 CN 01279383 U CN01279383 U CN 01279383U CN 2528562 Y CN2528562 Y CN 2528562Y
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Abstract
A cutting controller for continuous casting billet belongs to cutting control technology. Billet is cut and controlled by a plurality of ways, some are easy but have poor reliability and some have high precision but the cost is too high. Thus, a cutting controller for continuous casting billet length is designed and comprises an interface circuit and control circuit. The interface circuit includes a transformer, filter capacitor and shaping transformation circuit; the control circuit includes a shaping and counting circuit of signals which are transmitted to computer chip, a comparison circuit of touching ball signal grounding value, input circuit of functional operation button, and display circuit connected with the output from the computer chip, control output circuit and communication circuit connecting computer chip 485 interface; finally, the output terminal of the interface circuit is connected to the input terminal of the shaping and counting circuit of signals in the control circuit. The controller has very good results after the controller is cut and tested for 10,000 times. The yield is 0.2 percent higher than the manual control cutting, thus reducing labor intensity of workers and lowering the complexity of operation.
Description
Technical field
The utility model relates to a kind of scale cutting control technology, is specially continuous casting steel billet scale cutting control technology.
Technical background
Scale cutting control in the continuous-casting of steel billet industry, domestic each factory adopts multiple mode at present: " bumping the ball formula ", " friction roller numeration formula ", " video camera imaging control formula " etc." bump the ball formula " and adopt voltage relay one end ground connection, one terminates at and bumps on the ball, and steel billet is run into ball and formed the loop and trigger controller action and shear.It has advantages such as simple, flexible, but no signal indication, no regulatory function, easily produces misoperation." friction roller numeration formula " uses a period of time to wear and tear, and will produce bigger error." video camera imaging control formula " utilizes infrared camera imaging on computer screen, has dynamic menu, and effect is better, but the cost cost is too high.
Summary of the invention
The utility model is to overcome the no signal indication that exists in above three kinds of scale cutter controllers, no regulatory function, easily produce misoperation; Use a period of time to wear and tear, will produce bigger error; The too high shortcoming of cost cost, in line with practical and convenient, few investment and the principle reliable, that precision is high have designed a kind of novel continuous casting steel billet scale cutter controller,
This continuous casting steel billet cutter controller utilizes the tension leveller of continuous casting machine frequency converter, proportional relation between variation of control electric voltage frequency and the speed, and the Measurement for Inverter output frequency is counted computing, realizes that the Length Control cutting machine carries out the cutting of steel billet scale.Wherein the controller signals acquisition principle is:
The revolution N=60 F of asynchronous machine
1/ P (1-S), N-revolution, S-difference rate of rotation, P-motor number of pole-pairs.The rate of rotation of being on duty change when little N basically with F
1Be directly proportional.Promptly regulate the power supply unit electric voltage frequency and can directly control the revolution of asynchronous machine.On this principle basis, can obtain the motor revolution as the electric moter voltage that can detect as can be known by Frequency Converter Control.Frequency converter output voltage is controlled by inverter, makes six device for power switching conductings, shutoff in the determined time regularly, thereby dc power is transformed to the power output that exchanges of required voltage and frequency, and its output voltage waveforms as shown in Figure 2.Square wave is actual frequency converter output voltage among the figure, the F of dotted line for needing
1Value.If will obtain the F corresponding with revolution
1Signal must be exported frequency converter square wave and be converted to imitative sine wave, and the counting that closely obtains the offset of sinusoidal ripple is converted to motor revolution value, draws the traveling meter long value of steel billet as calculated.The utility model has designed interface circuit for this reason.The signal that draws through this interface circuit, corresponding steel billet traveling speed can satisfy the long requirement of scale cutting meter in drawing the steel process.
Bumping the ball voltage measurement signal adopts voltage relay to measure.Utilize relay to form at interval and trigger, the company of preventing cuts, and promptly the design logic circuit is designed to one with voltage signal measuring appliance and timer, and is controlled.
The structure of this continuous casting steel billet cutter controller constitutes, and is made up of interface circuit and control circuit.Described interface circuit comprises step-down transformer, filter capacitor and shaping translation circuit; Described control circuit comprises the signal shaping counting circuit that is transferred among the computer chip CPU, bumps ball signal ground value comparison circuit, feature operation button input circuit; With the communicating circuit of exporting latter linked display circuit, control output circuit by computer chip CPU and being connected computer chip CPU 485 interfaces; At last the interface circuit output is connected to the input of the signal shaping counting circuit in the control circuit.
Above-mentioned cutter controller, wherein the control of the cutting in control circuit output circuit comprises the pre-clamping control of cutting, cutting process control, three kinds of state outputs of cutting finishing control.
The cutter controller of the above, wherein the display circuit in the control circuit comprises casting speed, base length, bumps ball signal ground value, cuts four parameters demonstrations of number of times.
The cutter controller of the above, wherein the feature operation button input circuit in the control circuit comprises setting, speed, minimizing, four operations of increase button key.
This continuous casting steel billet scale cutter controller, good through ten thousand cutting trial effects, reach designing requirement.The comparable Artificial Control cutting mode of recovery rate improves 0.2%, and has alleviated labor strength and simplified Operating Complexity.
This controller function and cost are better than using PLC to carry out said function control in addition, and it has been saved using of high speed register module and has connected.Reduce PLC and be used for the delivery outlet that speed shows the long demonstration of base.Reduced the toggle switch fixed length and set taking of input port and this switch because loose contact brings fault to take place.Reduce the complexity of PLC programming.By producing 300000 tons of calculating of steel unit per year, use this controller to improve steel billet recovery rate 2 ‰ than former manual operations, count 600 tons of steel, be worth with 500 yuan of/ton calculating of crop waste product price differential by finished product and created 300,000 yuan of benefits.
Description of drawings
As shown in the figure, the utility model is made up of interface circuit and control circuit two large divisions. By the frequency converter electricity It is imitative sinusoidal wave to press signal to obtain through step-down, filtering, shaping conversion, is input to the signal shaping meter of control circuit In the number circuit; The signal shaping counting circuit, bump the letter of ball signal ground value circuit and function button input circuit Number be input to respectively the corresponding entrance of computer, through Computing, the output cutting is pre-to clamp control, cut Cut process control, cutting finishing control; Output and show that casting speed, continuous casting billet are long, bump the ball signal value, Cutting times etc.
The specific embodiment
Control circuit of the present utility model adopts single-chip microcomputer as controller, in establish eeprom memory and store as data, programmed protection is provided with house dog and data fault-tolerant system, isolates input and output fully.Data modification adopts the password password to enter formula, and every controller has own address addressable during with the computer communication, and the controller internal wiring adopts the high paster components and parts of integrated level to form, and double data show, are provided with each function key and can carry out various function controls.General PLC cuts the control function merely and brings up to the customizations intelligent level, and inner designed each functional module of this controller utilization is carried out computing to the steel billet parameters.Paired pulses coefficients by using high accuracy floating-point operation, and can revise once more according to different drive ratios.The further fixed heavily cutting that is embodied as of communication function is laid a good foundation in addition.
" bumping the ball formula " and cutting control simultaneously with " pulse numeration formula " has increased system reliability.Control inevitable skidding because of pulse and take place, bump ball control and can't show again that generally steel billet walks line length.The two prosecutor formulas of process have comprehensively improved both pluses and minuses the precision and the reliability of system, send the cutting order when bumping after ball switch is controlled at above the scale certain limit by pulse when malfunctioning, also can when pulse is controlled, limit overlength and trigger cutting order otherwise bump ball switch.Simulation shows that the length that the length mode also can obtain estimating shows when not having pulse input signal, cutting twice was estimated present average speed actuation time at interval before this moment, controller used automatically, and the line length approximation of going forward side by side shows to be pointed out the behaviour person of being.
Circuit control is because of adopting single-chip microcomputer as the controller data processor, its internal clocking adjustment setting side selects flexibly control mode, this machine both can cooperate other control circuit to finish flying shear cutting control and flame cutting machine control, can independently finish the control cutting function again.Can before cutting, send signal, and send signal after the cutting.With time or length is that every inner coefficient carries out every control setting.
Bumping the ball ground signalling is a low voltage earthing signal in fact, and control circuit adopts the external 24-36V voltage of voltage relay more.Inner 24V power supply is adopted in this machine design, utilizes to send control instruction behind the pulse collection multiple signal discriminatory analysis and avoided misoperation to greatest extent.And ground voltage is carried out numerical value show inner employing of controller, bump ball when unsettled voltage show the 7K reference value, show the 2K reference value during ground connection, if the unsettled magnitude of voltage of finding when bumping ball and not contacting steel billet just should be checked the line-to-ground situation less than 6K,, maintenance mans provide good reference data for checking line fault.But this ground value also has regulatory function, can satisfy the requirement of varying environment circuit.
Control is at interval cut by anti-company, adopt restriction to control anti-the company at interval at general scale cutting control loop cuts clipping time, this differs than steel bloom and has increased difficulty for cutting length surely, when the short timing controlled of the long base of cutting or not incision and the roller-way steel billet that skids do not leave and bump ball and will produce the secondary cut pulse.Regularly transfer long may making again regularly to be longer than the steel billet fixed length.Adopted the time departure detection mode in this controller design fixed length, promptly bumping ball cuts back steel billet motion and leaves and bump the ball contact and be no longer than a second, this and steel billet length are irrelevant, have had that five seconds is above to be disengaged and just allow to send next ground signalling in bumping ball as long as monitor steel billet.In design, just need not be provided with at interval like this, have been solved this problem from control logic to the steel billet cutting.
Get change Frequency device output voltage as the signal that counts, general scale cutting numeration pulse is taken from and is tapped into switch or pulse signal, and the straightening machine of the design's application does not have skidding substantially, picks up from straightening machine change Frequency device output so will survey long signal.Utilize to become the Frequency device and fail out the imitative sine wave of high Frequency and make input source and need filter the higher hamonic wave composition, just can obtain useful value input controller through overdamping again.Designed filter circuit for this reason.
The utility model is provided with " control suspends " for the abnormal conditions of dealing with in the production in use.In the control halted state, controller will stop used cutting control action (Presentation Function is constant).Press [putting key]+[minimizings] key simultaneously in normal state of a control, this arranges charactron at present and begins the flicker expression and enter " control time-out " state.Press once more [putting key]+[minimizing] key then withdraws from " control suspend ".
When control mode is set to bump ball control, withdraw from " control suspends " back controller with regard to having crossed the control time-delay between the cutting twice, can very fast acceptance bump the ball signal.
When control mode is set to pulse control, the operation of withdrawing from " control suspends " will start once complete cutting control procedure.Be set the zero point that cut point is a computational length simultaneously.
On during the cutting action, arrange charactron flicker continuously, cut the order of playbacking up to sending.
When controller morse signal light when connection sends data will be lighted.
Press the minimizing key continuously and will remove this class cutting counter=0 above 5 seconds.
If control mode is set to pulse control (PLUS), controller enters wait state when the system is first powered on automatically, wait the operator and provide the position at zero point: when steel billet advances to the position that cut, the operator presses [setting]+[minimizing] key and confirms that this position is the long position in addition of meter.Controller produces once complete cutting control action simultaneously.
Claims (4)
1, a kind of continuous casting steel billet cutter controller is made up of interface circuit and control circuit, it is characterized in that: (1) interface circuit comprises step-down transformer, filter capacitor and shaping translation circuit; (2) control circuit comprises the signal shaping counting circuit that is transferred among the computer chip CPU, bumps ball signal ground value comparison circuit, feature operation button input circuit; With the communicating circuit of exporting latter linked display circuit, control output circuit by computer chip CPU and being connected computer chip CPU 485 interfaces; (3) the interface circuit output is connected to the input of the signal shaping counting circuit in the control circuit.
2, cutter controller as claimed in claim 1 is characterized in that the cutting control output circuit in the control circuit, comprises the pre-clamping control of cutting, cutting process control, three kinds of state outputs of cutting finishing control.
3, cutter controller as claimed in claim 1 is characterized in that the display circuit in the control circuit, comprises casting speed, base length, bumps ball signal ground value, cuts four parameters demonstrations of number of times.
4, cutter controller as claimed in claim 1 is characterized in that the feature operation button input circuit in the control circuit, comprises setting, speed, minimizing, four operations of increase button key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01279383 CN2528562Y (en) | 2001-12-29 | 2001-12-29 | Continuous casting billet cutting controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01279383 CN2528562Y (en) | 2001-12-29 | 2001-12-29 | Continuous casting billet cutting controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2528562Y true CN2528562Y (en) | 2003-01-01 |
Family
ID=33682628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01279383 Expired - Lifetime CN2528562Y (en) | 2001-12-29 | 2001-12-29 | Continuous casting billet cutting controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2528562Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408227C (en) * | 2006-10-31 | 2008-08-06 | 重庆钢铁(集团)有限责任公司 | Automatic billet shearing system for multi-section square billet conticaster |
| CN102642005A (en) * | 2012-05-23 | 2012-08-22 | 河北钢铁股份有限公司邯郸分公司 | Square billet cutting root coupling counting method and device |
| CN105537721A (en) * | 2016-02-24 | 2016-05-04 | 山东钢铁股份有限公司 | Method and device for positioning cutting gun of torch cutter |
-
2001
- 2001-12-29 CN CN 01279383 patent/CN2528562Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408227C (en) * | 2006-10-31 | 2008-08-06 | 重庆钢铁(集团)有限责任公司 | Automatic billet shearing system for multi-section square billet conticaster |
| CN102642005A (en) * | 2012-05-23 | 2012-08-22 | 河北钢铁股份有限公司邯郸分公司 | Square billet cutting root coupling counting method and device |
| CN102642005B (en) * | 2012-05-23 | 2013-12-18 | 河北钢铁股份有限公司邯郸分公司 | Square billet cutting root coupling counting method and device |
| CN105537721A (en) * | 2016-02-24 | 2016-05-04 | 山东钢铁股份有限公司 | Method and device for positioning cutting gun of torch cutter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111229 Granted publication date: 20030101 |