CN103316954A - Cold-strip steel quality improving method using automatic pressure control method to eliminate impressions - Google Patents
Cold-strip steel quality improving method using automatic pressure control method to eliminate impressions Download PDFInfo
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- CN103316954A CN103316954A CN 201310016644 CN201310016644A CN103316954A CN 103316954 A CN103316954 A CN 103316954A CN 201310016644 CN201310016644 CN 201310016644 CN 201310016644 A CN201310016644 A CN 201310016644A CN 103316954 A CN103316954 A CN 103316954A
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Abstract
The invention discloses a cold-strip steel quality improving method using an automatic pressure control method to eliminate impressions. The method comprises following steps: calculating the number of winding turns of a strip steel head, and when the number reaches to a certain value, keeping the strip steel at tensed conditions; initializing measured values and set pressure values of a sleeve, and obtaining the thickness of the strip steel; judging whether the thickness is less than a pre--determined value; measuring the change of the sleeve pressure; screening the change of the sleeve pressure by a one-time inertia delaying method; according to the thickness of the strip steel which is about to wind, the yield strength of the strip steel, the width of the strip steel and parameters of the sleeve, setting the pressure value of a second expanding of the sleeve; calculating a pressure deviation value, and performing current output of a hydraulic servo mechanism by a proportional plus integral plus derivative control method; and judging the change of the absolute value of the pressure deviation value.
Description
Technical field
The present invention relates to a kind of control method that is applicable to use the coiling process unit that batches the cold rolling strap coil of strip, more particularly, relate to a kind of control method of utilizing automatic pressure control to eliminate impression raising cold-strip steel quality.
Background technology
The rolling mill production line coiling machine can produce reel folding line seal 11 when coiling band steel in the past, the sleeve folding line seal that produces for reducing mandrel for recoiling machine, two kinds of methods that ability is useful.
One: the same with domestic other similar unit, put rubber bush 12 on the mandrel of being everlasting, to alleviate the sleeve secter pat to the impact of belt steel surface.The folding line that prior art produces the socket type belt steel surface, remarkable inhibition eradicating efficacy is arranged, but during this class sleeve practical application, can be at thicker (〉=1.2mm) belt steel surface, can produce the new impression defective of taking the lead, it produces principle as shown in Figure 1, although used rubber bush, but be attached to because of the thick h1 of taking the lead on the outer ring of sleeve, take the lead inevitable and the second astragal steel between height of formation poor, along with the band steel in layer batches, the coil of strip diameter constantly increases, the pressure of taking the lead to bear also constantly increases, produce and to take the lead impression taking the lead contact portion thus, and be imprinted on curling subsequently belt steel surface, form and periodically take the lead impression, length reaches at most 200～300 meters, and product is left a blemish on.
Its two: adopt the sleeve of particular band groove and application to take the lead location technology." heart shape " type groove sleeve 22 is exactly wherein a kind of as shown in Figure 2, when using " heart shape " jacket cylinder, before taking the lead to locate, sleeve elder generation spreading is waited for, by taking the lead location technology, make to take the lead to drop on " heart shape " type groove, to take the lead to be hidden in the groove, make the 2nd circle and take the lead to take the lead not to be subjected to excessive pressure when overlapping, therefore can not produce the sharp-pointed impression 21 of taking the lead.Hit in the situation that take the lead to locate, equally also can produce and take the lead impression, only relatively reduce a bit.
Simultaneously, because " heart shape " type recess width and the degree of depth are restricted, it is decided by the precision of taking the lead to locate fully to the effect of inhibiting band steel impression.Because " variety classes band steel, the flexibility of threading is different, makes the length computation value of taking the lead to follow the tracks of produce the synchronism error with actual band steel walking length, causes the location not accurate; As be with the steel oiling, inner ring slip etc. when coiling machine is set up tension force " all can affect and take the lead positioning accuracy, cause and take the lead position success rate less than 90%.Therefore take the lead impression length control effect unstable (the belt end seal scope control is in 15～40 meters scopes), sometimes even steel impression defective can occur being with in batches.
Summary of the invention
Purpose of the present invention aims to provide a kind of control method of utilizing automatic pressure control to eliminate impression raising cold-strip steel quality, solves the various deficiencies that exist in the prior art.
According to the present invention, provide a kind of and utilize automatic pressure control to eliminate the control method that impression improves the cold-strip steel quality, may further comprise the steps:
Step 1 is installed a cover circular sleeve at the band steel drum, and the top layer of described sleeve is provided with one deck rubber, under described sleeve harmomegathus pressure-acting, and described rubber layer generation elastic deformation, described amount of elastic deformation and described pressure are proportional;
Step 2 is calculated the curling number of turns of band steel toe, and after the curling fixing turn of described band steel toe, the steel of band shown in making is in tensioned state;
Step 3 initializes described sleeve force due to centrifugal action measured value and pressure set points, obtains belt steel thickness;
Whether the described belt steel thickness that step 4, judgement will be batched is less than a predetermined value;
Step 5, the variation of measuring the sleeve force value;
Step 6 adopts an inertial delay mode that the variation of described sleeve force due to centrifugal action value is filtered;
Step 7 according to wanting the curling thickness with steel, band steel yield strength, strip width and sleeve parameter, is set the force value that sleeve is wanted spreading for the second time;
Step 8, calculating pressure departure, the electric current output of the proportional control valve of adoption rate, integration, differential control mode output hydraulic pressure servo control mechanism;
Step 9 is judged the variation of pressure divergence amount absolute value.
According to one embodiment of the invention, an inertial element transfer function of the inertial delay of step 6 is 1/(1+Ts).Wherein, T is the time constant of link, and s is complex variable, and value is plural number, and its expression-form is s=σ+i ω, σ wherein, and ω is real number, i is imaginary unit.
According to one embodiment of the invention, the pressure set points of spreading of step 7 is Fset, described sleeve spreading pressure and belt steel thickness h and be with the functional relation expression formula between steel parameter M, W: Fset=2h * K+ ε (M, W).
According to one embodiment of the invention, the pressure divergence amount △ F=pressure set points-pressure measuring value of step 8, the output quantity of described hydraulic servomechanism is: Vout_AFC=∑ KG
AFC[△ F (k)-△ F (k-1)]+KP
AFC* △ F (k)+∑ KI
AFC* △ F (k) * △ T
2△ F(k)=Fset(k)-Fact(k).Wherein, KG
AFCBe overshoot gain, KP
AFCBe proportional gain, KI
AFCBe storage gain, △ T
2Be cycle task T
2Time scan period, K be T
2The k time execution cycle of task.
According to one embodiment of the invention, when the variation of pressure divergence amount △ F absolute value during greater than preset value, execution in step five.
According to one embodiment of the invention, rubber layer is oil resistant rubber, and thickness is 8mm, and the hardness of innermost layer rubber is Shao Er hardness 80～60 degree, and rubber topping hardness is Shao Er hardness 60～45 degree, and the sleeve spreading is of a size of 508mm or 610mm.
Adopted technical scheme of the present invention, when according to band steel h, W and the given Fset of M calculation of parameter, cycle is obtained pressure feedback Fact, given deviation △ F(k with feedback of calculating K cycle) and the deviation of K cycle and K-1 cycle △ F, be input in the AFC controller, carry out Deviation Control, the elasticity at sleeve absorbs under the buffering simultaneously, adopt the AFC control mode, the sleeve life-span is not produced harmful effect.
Description of drawings
In the present invention, identical Reference numeral represents identical feature all the time, wherein:
Fig. 1 is the band steel impression that existing General Purpose Rubber sleeve is taken the lead to superpose and caused;
Fig. 2 is the band steel impression that existing " heart shape " type rubber bush is taken the lead to superpose and caused;
Fig. 3 is the general frame of control system of the present invention;
Fig. 4 is that the present invention improves Cold-strip Steel Surface quality method control flow chart;
Fig. 5 is rubber bush hierarchy sectional view;
Fig. 6 is the flow chart of Automatic Diameter Control device method of the present invention;
Fig. 7 is the flow chart of automatic pressure controller method of the present invention;
Fig. 8 is KG
AFCGain and length tension relation figure;
Fig. 9 is the 2nd sleeve spreading pressure control design sketch;
Figure 10 takes the lead impression control design sketch after the control of 2 harmomegathus of sleeve.
The specific embodiment
Further specify technical scheme of the present invention below in conjunction with drawings and Examples.
Control the existing problem of used sleeve " the positioning accuracy dependency degree is large to taking the lead, and the control effect is unstable, relies on particular groove " in view of the existing impression of taking the lead, technical scheme of the present invention mainly is divided into 4 stages.
Facility is prepared: when producing the plate that cold rolling surface quality has relatively high expectations, 1 cover standard circular sleeve is installed;
The control of the 1st harmomegathus: set up a cover diameter automatic controller (ADC), setting value Dset takes the lead the relation function of thickness, carries out sleeve spreading diameter control the 1st time;
Threading, strip winding are followed the tracks of control: after taking the lead to batch the N circle, drop into and build an order, make the band steel be in tensioned state;
The 2nd harmomegathus control: the first step: once control the stage: drop into sleeve force due to centrifugal action automatic controller (AFC), setting value Fset be take the lead thickness, sleeve coefficient of elasticity, with the relation function of steel specification and yield strength; Second step operation: carry out the pressure control of the 2nd sleeve spreading, under the overshoot effect, the rapid spreading of sleeve is to peak pressure, impact makes that to take the lead to push little distortion downward, then return in the setting pressure process, make rubber return to thickness corresponding to elasticity, take the lead the most at last to sink in the 8mm rubber layer.
As shown in Figure 3, it comprises 6 parts: the 3-1 selector, and 3 signal combination select to drop into 3-2ADC control or 3-3AFC control; The 3-2ADC controller, Vout_ADC is to the 3-6 hydraulic servomechanism in output, makes sleeve spreading diameter reach spreading setting value Dset the 1st time; The 3-3AFC controller, Vout_AFC is to the 3-6 hydraulic servomechanism in output, makes sleeve force due to centrifugal action first through stable to the 2nd spreading setting value Fset behind the pressure of peak; 3-4 is used for measuring the measurement of sleeve diameter value Dact; 3-5 is used for measuring the measurement of sleeve force value Fact; The 3-6 hydraulic servomechanism, the controlled quentity controlled variable of reception AFC controller and ADC controller is carried out sleeve oil cylinder harmomegathus size and pressure control.
As shown in Figure 4, specifically, the method for raising Cold-strip Steel Surface quality of the present invention comprises:
Step1: the circular sleeve of the non-special shape of a cover is installed on the sleeve, and the sleeve top layer is provided with 1 and thickly layer by layer be the rubber of Xmm, and under sleeve harmomegathus pressure-acting, this layer is understood generation elastic deformation, and elastic deformation amount and pressure are proportional, and proportionality coefficient is K.
Related rubber bush uses oil resistant rubber, the hardness of innermost layer rubber is Shao Er hardness 80～60 degree, thickness is that 8mm rubber topping hardness is Shao Er hardness 60～45 degree, sleeve be hierarchy as shown in Figure 5, superficial layer rubber 51 is softer, internal layer rubber 52 is harder, plays a supportive role, and the nominal size of rubber bush spreading is 508mm or 610mm.This rubber bush is used for the cold rolling thick band steel of 0.3～2.3mm that batches, and can better eliminate or reduce and take the lead impression.
This structure is lower to the positioning requirements precision of taking the lead in producing, and needn't take the lead to locate, and general control just can meet the demands.
Step2: set up a cover Automatic Diameter Control device, be called for short ADC, the threading preparatory stage, selector 3-1 select to drop into ADC control, the 1st time with the sleeve spreading to predetermined diameter, its control flow is referring to Fig. 6, mainly comprise following 8 steps, each step work relationship is as follows:
2.1 initialize sleeve diameter measured value Dact and diameter setting value Dset, obtain band steel parameter h, execution in step 2.2;
2.2 judge and want the coiling band steel thickness h, if less than certain determined value, execution in step 2.3, otherwise control finishes;
2.3 selector 3-1 judges whether to drop into ADC control, if condition is set up execution in step 2.4, otherwise control end;
2.4 the variation of adopting magnetic scale formula position sensor to measure sleeve diameter value Dact, execution in step 2.5;
2.5 the variation to sleeve diameter value Dact is filtered, adopt one time the inertial delay mode, its inertial element transfer function is 1/(1+Ts) (wherein T is the time constant of link, s is complex variable, and value is plural number, and its expression-form is s=σ+i ω, σ wherein, ω is real number, and i is imaginary unit, i
2=-1), execution in step 2.6;
2.6 according to the thickness of wanting coiling band steel, set the diameter value Dset that sleeve is wanted spreading, set up the functional relation between sleeve spreading diameter and belt steel thickness, its expression formula is Dset=f(h)=610-2h, execution in step 2.7;
2.7 calculated diameter departure △ D formula is △ D=Dset-Dact, operation Automatic Diameter Control device (ADC), and the adoption rate integration control is calculated hydraulic servomechanism 3-6 output quantity Vout_ADC, and its computing formula is Vout_ADC=KP
ADC* △ D+ ∑ KI
ADC* △ D * △ T2 exports to servo valve and carries out closed-loop control, execution in step 2.8;
Wherein:
KP
ADCBe proportional gain;
KI
ADCBe storage gain;
△ D diameter deviation amount;
T
2Be cycle task T
2Scan period;
2.8 judge the variation of diameter deviation amount △ D absolute value, if greater than certain determined value, execution in step 2.4, otherwise control finishes.
The present invention makes it compared with prior art owing to having adopted technique scheme, has the following advantages and good effect:
When coiling machine is in the standby of coil of strip switching during the stage, sleeve carries out first the 1st spreading action, drop into ADC control, carry out the Deviation Control between Dset and Dact, making control deviation is " 0 ", sleeve diameter is stablized be controlled at the Dset value, can not only effectively improve the belt steel surface impression, reduce impression length, and can not exert an influence to sleeve.If be combined with the 2nd harmomegathus function simultaneously, be that the 2nd harmomegathus stays desirable spreading space, guarantee the performance of the 2nd spreading impact effect, can further improve the belt steel surface impression, until eliminate.
Step3: the threading stage, calculate and take the lead to batch the number of turns, after taking the lead to batch the N circle, drop into and build an order, make the band steel be in tensioned state.
Step4: set up a cover automatic pressure controller, be called AFC, after tension force F was stable, selector 3-1 selected to drop into AFC control, the 2nd spreading sleeve, under the overshoot effect, the rapid spreading of sleeve produces surge 91, impacts to make and takes the lead to push little distortion downwards and hiding to rubber layer, and its control flow is referring to Fig. 7, mainly comprise following 8 steps, each step work relationship is as follows:
4.1 initialize sleeve diameter measured value Fact and diameter setting value Fset, obtain band steel parameter h, execution in step 4.2;
4.2 judge and want the coiling band steel thickness h, if less than certain determined value, execution in step 4.3, otherwise control finishes;
4.3 selector 3-1 judges whether to drop into AFC control, if condition is set up execution in step 4.4, otherwise control end;
4.4 adopts pressure sensor is measured the variation of sleeve force value Fact, execution in step 4.5;
4.5 the variation to sleeve force due to centrifugal action value Fact is filtered, adopt one time the inertial delay mode, its inertial element transfer function is 1/(1+Ts) (wherein T is the time constant of link, s is complex variable, and value is plural number, and its expression-form is s=σ+i ω, σ wherein, ω is real number, and i is imaginary unit, i
2=-1), execution in step 4.6;
4.6 according to the thickness h of wanting coiling band steel, band steel parameter M and W, sleeve parameter K, set sleeve the 2nd less important spreading force value Fset, set up sleeve spreading pressure and belt steel thickness h and with the functional relation between steel parameter M, W, its expression formula is: Fset=2h * K+ ε (M, W), execution in step 4.7;
Wherein:
H is belt steel thickness;
K is the sleeve elastic deformation coefficient;
M is band steel yield strength;
W is strip width;
ε (M, W) pressure compensation function obtains by look-up table.
4.7 calculating pressure departure △ F formula is △ F=Fset-Fact, operation automatic pressure controller (AFC), adoption rate, integration, differential control mode, its input parameter is △ F, output parameter is the electric current output Vout_AFC of hydraulic servomechanism 3-6 proportional control valve, and its computing formula is:
Vout_AFC=∑KG
AFC[△F(k)-△F(k-1)]+KP
AFC×△F(k)+∑KI
AFC×△F(k)×△T
2
△F（k）=Fset（k）-Fact（k）；
Wherein:
KG
AFCBe the overshoot gain, determining sleeve spreading peak pressure the 2nd time, because of the 2nd harmomegathus tension force F being arranged and being with under the steel running status and dropping into, for obtaining better response speed, this gain is set proportional relation for strip tension F, and gain setting and tension force F magnitude relationship are seen Fig. 8;
KP
AFCBe proportional gain;
KI
AFCBe storage gain;
△ T
2Be cycle task T
2Time scan period;
K is T
2The k time execution cycle of task;
Change 4.8 judge the absolute value of pressure divergence amount △ F, if greater than certain determined value, execution in step 4.4, otherwise control finishes.
The present invention makes it compared with prior art owing to having adopted technique scheme, has the following advantages and good effect:
Selector determines to drop into the AFC controller, according to band steel h, W and the given Fset of M calculation of parameter, cycle is obtained pressure feedback Fact, given deviation △ F(k with feedback of calculating K cycle) and the deviation of K cycle and K-1 cycle △ F, be input in the AFC controller, carry out Deviation Control, the output governing speed is that control response is by KG
AFC, KP
AFCAnd KI
AFCParameter is determined, at first by KG
AFCParameter is regulated and to be made the rapid spreading of sleeve to peak pressure, takes the lead outside that the astragal steel has under the tension force F state, through the impact of peak pressure, makes and takes the lead to push little distortion, then at KP
AFCAnd KI
AFCParameter is regulated and is made sleeve spreading pressure return to setting Fset, makes outer layer rubber recover thickness corresponding to elasticity, will take the lead to sink into wherein, and pressure control effect is seen Fig. 9.Simultaneously the elasticity at sleeve absorbs under the buffering, adopts the AFC control mode, and the sleeve life-span is not produced harmful effect.
Under the combination control of the 1st ADC control and the 2nd AFC control, after sleeve 102 is implemented 2 harmomegathus control, to take the lead to control effect and see Figure 10, impression 101 is effectively controlled, and shortens even eliminates and take the lead impression.
Beneficial effect of the present invention
The invention provides " a kind of control method of eliminating impression raising cold-strip steel quality ", be specially adapted to the high cold rolled strip steel production quality improvement of surface requirements, have following evident characteristic and effect:
1, the non-particular groove structure of employed sleeve, for typical circular designs, handling ease, therefore, cost is lower, can save cost for enterprise;
2, control method is novel, adopts 2 times unique harmomegathus control technologys, and the flexible independence or be used in combination of 2 harmomegathus ADC control technologys and AFC control technology, makes the control effect better.The former sleeve replacement cycle is 3 months, based on the rubber bush elastic reaction, adopt this harmomegathus technology after, through actual achievement checking, sleeve exchanging cycle and former sleeve replacement cycle are approaching, can not produce harmful effect to the sleeve life-span;
3, take the lead impression control effect stability high, original technology relies on sleeve positioning accuracy height, does not take the lead on time impression to reach more than 200 meters in the location, and the control effect stability is not high, and the present invention need not to take the lead the location;
4, can be enterprise and bring considerable benefit, the present invention can take the lead impression and be controlled in 2 circles, only has slightly, namely in 10 meters, can greatly reduce because taking the lead the long coil of strip price differential of demoting that makes of impression.
The below illustrates above-mentioned method with an embodiment:
Take the lead impression control implementation process under belt steel thickness h=0.7mm, width W=1200mm, the yield strength M=100pa condition:
1, installation diagram 4 described sleeves on sleeve, the elastic deformation amount of this sleeve outer layer rubber layer and the proportional coefficient of pressure are K, in this sleeve outer ring steel ring are installed first, and then increase the spreading pressure of sleeve, by experiment, take the method Coefficient of determination K as 1mm/30pa;
2, eliminate the control technology that impression improves the cold-strip steel quality, the program of being converted into is achieved, and its main process is: produce unit at two coiling machines, coiling machine operation, one coiling machine standby is prepared, carry out this control method at the coiling machine of position of readiness, at first carry out the 1st harmomegathus ADC control of sleeve, the spreading position is determined by Dset, namely in this example the 1st spreading of sleeve diameter to 608.6mm, under the control of ADC controller, sleeve diameter is controlled in 608.6 ± 0.5mm deviation range, then follows the tracks of next tape head position, when waiting to take the lead to this coiling machine, begin record and batch number of turns N, this routine N is 2 circles, begins to set up tension force, and behind tension stability, drop into rapidly AFC control, pressure setting is 2 * 0.7 * 30+ ε (M, W)=42Mpa+ ε (M, W), ε (M, W) is definite by look-up table, and overshoot is by KG
AFCParameter determines, under the overshoot effect, takes the lead to have at the 2nd circle to be extruded under the tension state and deformation occurs, and is bent downwardly, at KP
AFCAnd KI
AFCSleeve spreading pressure is returned to set Fset, will take the lead to sink into wherein.
2, adopting parameters:
The form that ε (M, W) is corresponding
ADC control focuses on the control accuracy of sleeve diameter, and is less demanding to control response, therefore chooses by experiment KP
ADCBe 0.9, KI
ADCBe 0.95.
AFC control focuses on crimp after the impact of taking the lead and takes the lead to sink in the outer 5mm rubber, overshoot and response is required high, matches by experiment and chooses KG
AFCSetting curve is seen Fig. 5, KP
AFCBe 1.05, KI
AFCBe 0.95.
3, take the lead impression control effect:
By above control logic and adopting parameters, belt steel thickness h=0.7mm, width W=1200mm, yield strength M=100pa band steel outside plate is taken the lead impression length and is controlled in 7 meters, and stability is high.
Those of ordinary skill in the art will be appreciated that, above specification only is one or more embodiments among the numerous embodiment of the present invention, and is not to use limitation of the invention.Any for the above embodiment equalization variation, modification and be equal to the technical schemes such as alternative, as long as connotation scope according to the invention, all will drop in the scope that claims of the present invention protect.
Claims (6)
1. one kind is utilized automatic pressure control to eliminate the control method that impression improves the cold-strip steel quality, it is characterized in that, may further comprise the steps:
Step 1 is installed a cover circular sleeve at the band steel drum, and the top layer of described sleeve is provided with one deck rubber, under described sleeve harmomegathus pressure-acting, and described rubber layer generation elastic deformation, described amount of elastic deformation and described pressure are proportional;
Step 2 is calculated the curling number of turns of band steel toe, and after the curling fixing turn of described band steel toe, the steel of band shown in making is in tensioned state;
Step 3 initializes described sleeve force due to centrifugal action measured value and pressure set points, obtains belt steel thickness;
Whether the described belt steel thickness that step 4, judgement will be batched is less than a predetermined value;
Step 5, the variation of measuring the sleeve force value;
Step 6 adopts an inertial delay mode that the variation of described sleeve force due to centrifugal action value is filtered;
Step 7 according to wanting the curling thickness with steel, band steel yield strength, strip width and sleeve parameter, is set the force value that sleeve is wanted spreading for the second time;
Step 8, calculating pressure departure, the electric current output of the proportional control valve of adoption rate, integration, differential control mode output hydraulic pressure servo control mechanism;
Step 9 is judged the variation of pressure divergence amount absolute value.
2. the method for claim 1 is characterized in that:
An inertial element transfer function of the inertial delay of described step 6 is 1/(1+Ts);
Wherein, T is the time constant of link, and s is complex variable, and value is plural number, and its expression-form is s=σ+i ω, σ wherein, and ω is real number, i is imaginary unit.
3. the method for claim 1 is characterized in that:
The pressure set points of wanting spreading of described step 7 is Fset, described sleeve spreading pressure and belt steel thickness h and be with the functional relation expression formula between steel parameter M, W: Fset=2h * K+ ε (M, W).
4. the method for claim 1 is characterized in that:
The pressure divergence amount △ F=pressure set points-pressure measuring value of described step 8, the output quantity of described hydraulic servomechanism is:
Vout_AFC=∑KG
AFC[△F(k)-△F(k-1)]+KP
AFC×△F(k)+∑KI
AFC×△F(k)×△T
2；
△F（k）=Fset（k）-Fact（k）；
Wherein, KG
AFCBe overshoot gain, KP
AFCBe proportional gain, KI
AFCBe storage gain, △ T
2Be cycle task T
2Time scan period, K be T
2The k time execution cycle of task.
5. the method for claim 1 is characterized in that:
When the variation of described pressure divergence amount △ F absolute value during greater than preset value, execution in step five.
6. the method for claim 1 is characterized in that:
Described rubber layer is oil resistant rubber, and thickness is 8mm, and the hardness of innermost layer rubber is Shao Er hardness 80～60 degree, and rubber topping hardness is Shao Er hardness 60～45 degree;
Described sleeve spreading is of a size of 508mm or 610mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104795341A (en) * | 2015-04-16 | 2015-07-22 | 武汉华威科智能技术有限公司 | Chip thermal pressure detection method and system and chip hot-pressing packaging control system |
| CN105955220A (en) * | 2016-06-17 | 2016-09-21 | 首钢总公司 | Method and apparatus for controlling coiling tension of strip steel |
| CN106311799A (en) * | 2015-06-30 | 2017-01-11 | 宝钢工程技术集团有限公司 | Device eliminating strip head mark of coiling machine and using method of device |
| CN111229863A (en) * | 2018-11-29 | 2020-06-05 | 宝山钢铁股份有限公司 | Coiling machine and control method thereof |
| WO2023050101A1 (en) * | 2021-09-28 | 2023-04-06 | 宁德时代新能源科技股份有限公司 | Pressure control method for cold press, and electronic device |
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2013
- 2013-01-16 CN CN 201310016644 patent/CN103316954A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795341A (en) * | 2015-04-16 | 2015-07-22 | 武汉华威科智能技术有限公司 | Chip thermal pressure detection method and system and chip hot-pressing packaging control system |
| CN104795341B (en) * | 2015-04-16 | 2017-08-25 | 武汉华威科智能技术有限公司 | A kind of chip thermal pressure detection method, system and packaging by hot pressing control system |
| CN106311799A (en) * | 2015-06-30 | 2017-01-11 | 宝钢工程技术集团有限公司 | Device eliminating strip head mark of coiling machine and using method of device |
| CN106311799B (en) * | 2015-06-30 | 2020-03-06 | 宝钢工程技术集团有限公司 | Device for eliminating tape head print of coiling machine and using method thereof |
| CN105955220A (en) * | 2016-06-17 | 2016-09-21 | 首钢总公司 | Method and apparatus for controlling coiling tension of strip steel |
| CN111229863A (en) * | 2018-11-29 | 2020-06-05 | 宝山钢铁股份有限公司 | Coiling machine and control method thereof |
| WO2023050101A1 (en) * | 2021-09-28 | 2023-04-06 | 宁德时代新能源科技股份有限公司 | Pressure control method for cold press, and electronic device |
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Application publication date: 20130925 |