CN107282647A - A kind of bar continuous rolling eliminates the overproof control device and method of tail dimension - Google Patents
A kind of bar continuous rolling eliminates the overproof control device and method of tail dimension Download PDFInfo
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- CN107282647A CN107282647A CN201710502087.6A CN201710502087A CN107282647A CN 107282647 A CN107282647 A CN 107282647A CN 201710502087 A CN201710502087 A CN 201710502087A CN 107282647 A CN107282647 A CN 107282647A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/18—Automatic gauge control
- B21B37/20—Automatic gauge control in tandem mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
A kind of bar continuous rolling eliminates the overproof control device and method of tail dimension, belongs to bar continuous rolling device and method technical field, for eliminating tail of product dimension overproof in bar continuous rolling production.Its technical scheme is：The present invention is monitored using programmable controller, metal detection element, encoder, communication network, caliper to bar tail dimension, upstream stand reduction of speed of the programmable controller according to the overproof length of bar tail dimension in time to control finished frame, reduction of speed amplitude is by automatic control system according to bar afterbody dimension discrepancy with being calculated automatically after standard size contrast, by the reduction of speed upstream stand come the bar tension force increasing frame, overproof tail dimension is set to reach acceptability limit under tension.The present invention is the pioneering of bar continuous rolling technology, it is easy to operated, regulation is quick, and effect significantly, solves the tail of product dimension overproof problem of generally existing in bar continuous rolling production, significantly improves product lumber recovery, reduce production cost.
Description
Technical field
The present invention relates to a kind of control device and method that tail of product dimension overproof is eliminated in bar continuous rolling production, category
In bar continuous rolling device and method technical field.
Background technology
In bar continuous rolling production, the overproof problem of tail dimension is protruded very much, and tracing it to its cause mainly has two：One is hot base tail
Portion is compared with the delayed rolling in head, and the lost time length of heat causes afterbody low compared with head temperature, and plastic deformation diminishes during rolling；Two be to roll
There is tension force effect during system between milling train, disappeared when afterbody departs from milling train backward pull, elastic recovery can occur for plastic deformation
Tail dimension is caused to become big, the elastic amount of recovery of each sortie afterbody in finished frame upstream, which is superimposed, make it that finished product tail dimension is overproof.Adopt
It can only be satisfied by with the method for conventional adjustment roll gap drafts taking into account whole product size on the basis of tolerance, to chi
Very little overproof bar afterbody is partially adjusted, and not only increases operation difficulty, and under many circumstances, the method for adjustment
Bar tail dimension can not be caused to meet Product Precision requirement, this is the problem of generally existing in bar continuous rolling production.Due to super
Poor part can only cause production cost to increase as waste wood, once export trade accidentally can also cause claim on account of quality event.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of bar continuous rolling and eliminate the overproof control device of tail dimension
And method, this apparatus and method can in time reduce the speed of upstream stand according to the overproof tail length of bar size,
To increase the bar tension force between frame, overproof tail dimension is set to reach acceptability limit under tension.
Solving the technical scheme of above-mentioned technical problem is：
A kind of bar continuous rolling eliminates the overproof control device of tail dimension, it include programmable controller, metal detection element,
Encoder, communication network, caliper, encoder are fixed on the electric machine main shaft afterbody of finisher, two metal detection element peaces
Mounted in the rear of finisher, caliper is arranged on the rear portion of finisher, and caliper is located at finisher and metal detection member
Between part, programmable controller has the numeral input mould of hardware interrupts function with one piece of high speed counting mould and one piece
Plate, the encoder of electric machine main shaft afterbody of the high speed counting mould with being fixed on finisher is connected, with hardware interrupts function
Numeral input template is connected with two metal detection elements at finisher rear, and programmable controller passes through communication network
It is connected with each sortie rolling mill drive apparatus.
A kind of bar continuous rolling eliminates the overproof control device of tail dimension, the setting of the distance between two metal detection elements
For L.
A kind of bar continuous rolling using above-mentioned control device eliminates the overproof control method of tail dimension, and it uses following step
It is rapid to carry out：
A. programmable controller is counted to encoder pulse in real time by the high speed counting mould carried, works as bar
After being rolled through each sortie milling train order, difference and two metals of count value when passing through two metal detection elements to bar head are examined
Survey between element apart from L progress computings, calculate the corresponding rod product length △ l of individual pulse；
B. when bar afterbody order departs from ST1~STk~STnDuring milling train, bar afterbody departs from milling train signal with each stand motor
The change of torque bust is along judging, programmable controller records encoder pulse count value N at that time respectively1~Nk~Nn, survey
If footpath instrument is detected away from finished product tail length LtFinished size exist overproof, then can calculate LtCorresponding umber of pulse Nt
=Lt/ △ l, LtIt is the finished product tail length value that bar has dimension overproof, NtIt is umber of pulse corresponding with the overproof length value of afterbody
Value;
If c. following equation is set up：Nn-Nt-Nk=△N≧0（K ＜ n-1）, and Nn-Nt-Nk+1During ＜ 0, then rod is may determine that
Material afterbody departs from STkRolling mill and after the N number of pulses of △, finished size starts overproof problem occur, then program controller PLC
Device since begin through communication network control this moment transmission device be single to the upstream of finished frame or multi-frame reduction of speed；
If d. k=n-1, i.e. Nt≦Nn-Nn-1, now because bar afterbody has been detached from STn-1Rolling mill, then now again to STn-1
Rolling mill carries out speed and adjusts late, and speed governing opportunity is changed to depart from ST with bar afterbodyn-2Rolling mill simultaneously passes through Nn-1-Nn-2-
NtIndividual pulse starts in advance to STn-1Rolling mill carries out speed governing, but mode of speed regulation is different from situation described in k ＜ n-1；
E. function is adjusted to upstream stand speed to disappear from the overproof defect of bar tail dimension, depart from quilt to bar afterbody at the latest
Terminate during controlled rolling machine.
Above-mentioned bar continuous rolling eliminates the overproof control method of tail dimension, if the overproof amplitude of bar afterbody is less, only
To STn-1Rolling mill carries out speed governing；If the overproof amplitude of bar afterbody is bigger than normal, in order to prevent to single-rack significantly reduction of speed shape
Into hightension is crossed to the adverse effect of bar profile, such as ovality then can also be to upstream stand STn-2~STkSpeed governing is carried out respectively
Control.
Above-mentioned bar continuous rolling eliminates the overproof control method of tail dimension, determines finished product upstream milling train adjustment of rotational speed amount, will
The overproof part of finished size is contrasted with standard size, draws overproof sectional area △ S, according to each sortie rolled metal in even bundle production
Second flow equal principle：The overproof sectional area △ S and finished frame speed product VnEqual to by tune frame STkPass sectional area
SkWith speed regulated quantity △ VkProduct, i.e.,：△Vk =△S*Vn/Sk, operating personnel can according to actual Adjustment effect as
Radix is suitably finely tuned to regulating the speed for upstream stand.
Above-mentioned bar continuous rolling eliminates the overproof control method of tail dimension, to single-rack STn-1The feelings of rolling mill speed governing
Condition, if afterbody dimension discrepancy is basically identical, using same adjustment of rotational speed amount；If each section of dimension discrepancy difference of afterbody is larger,
Dimension precision requirement can not be met using same adjustment of rotational speed amount, then should be segmented and take different adjustment of rotational speed amounts to be controlled.
Above-mentioned bar continuous rolling eliminates the overproof control method of tail dimension, to single-rack STn-1Rolling mill speed governing and Nt≦
Nn-Nn-1Situation, when to STn-1When rolling mill starts speed governing, the overproof original position of bar afterbody just bites STn-1Frame rolls
Machine, now milling train STn-1To finished frame STnCenter section meet size requirement, if now unexpected reduction of speed, generation
Tension increment can have a negative impact to this part of qualified bar, as size diminishes, and take by reduction of speed 0~△ of amplitude Vn-1, tiltedly
The ripple time is Lt/VnOblique wave deceleration method application effect it is good.
Above-mentioned bar continuous rolling eliminates the overproof control method of tail dimension, and many rolling mills are participated in the situation of speed governing, each quilt
The overproof effect played of bar size that the reduction of speed amplitude of controlled rolling machine should eliminate each controlled frame downstream all considers
Inside.
The beneficial effects of the invention are as follows：
The present invention is using programmable controller, metal detection element, encoder, communication network, caliper to bar afterbody chi
It is very little to be monitored, upstream of the programmable controller according to the overproof length of bar tail dimension in time to control finished frame
Frame reduction of speed, reduction of speed amplitude by automatic control system according to being calculated automatically after the contrast of bar afterbody dimension discrepancy and standard size,
By the reduction of speed upstream stand come the bar tension force increasing frame, overproof tail dimension is set to reach conjunction under tension
Lattice scope.
The present invention is the pioneering of bar continuous rolling technology, it is easy to operate, regulation is quick, effect is notable, by bar continuous rolling certainly
Autocontrol system in time increases the method for interstand tension to the upstream stand reduction of speed of finished frame, realizes overproof bar
Tail dimension meets required precision, solves the tail of product dimension overproof problem of generally existing in current bar continuous rolling production,
Product lumber recovery is considerably improved, production cost is reduced, the economic benefit of enterprise is improved, in industry has and admirably pushes away
Wide use value.
Brief description of the drawings
Fig. 1 is the overproof control device structural representation of elimination tail dimension of the invention.
Marked in figure as follows：STkRolling mill 1, STn-1Rolling mill 2, STnIt is rolling mill 3, bar 4, transmission device 5, programmable
Sequence controller 6, metal detection element 7, encoder 8, communication network 9, caliper 10.
Embodiment
The bar continuous rolling of the present invention eliminates the overproof control device of tail dimension by programmable controller 6, metal detection
Element 7, encoder 8, communication network 9, caliper 10 are constituted.
Shown in figure, encoder is fixed on the electric machine main shaft afterbody of finisher, for carrying out step-by-step counting.Two metals
Detecting element 7 is arranged on the rear of finisher, and the distance between two metal detection elements 7 are set as L.Caliper 10 is installed
At the rear portion of finisher, rangefinder 10 is located between finisher and metal detection element 7, and finisher is the ST in figuren
Rolling mill 3.
Shown in figure, programmable controller 6 carries high speed counting mould and the numeral input with hardware interrupts function
Template.High speed counting mould is with being fixed on STnRolling mill 3（Finisher）The encoder 8 of electric machine main shaft afterbody be connected, band
There are hardware interrupts function digit input template and STnRolling mill 3（Finisher）Two metal detection elements 7 at rear are connected
Connect, programmable controller 6 is connected by communication network 9 with each sortie rolling mill drive apparatus 5, transmission device 5 includes becoming
The parts such as frequency device, motor, reduction box.
The bar continuous rolling of the present invention is eliminated the overproof control method of tail dimension and carried out using following steps：
A. programmable controller 6 is counted to the pulse of encoder 8 in real time by the high speed counting mould carried, works as rod
After material 4 is rolled through each sortie milling train order, the difference and two to the head of bar 4 by count value during two metal detection elements 7
Computing is carried out apart from L between metal detection element 7, the corresponding finished product length △ l of bar 4 of individual pulse are calculated；
B. when bar afterbody order departs from ST1~STk~STnDuring milling train, milling train signal is departed from each milling train electricity with bar afterbody
The change of machine power square bust is along judging, programmable controller 6 records the counted number of pulses N of encoder 8 at that time respectively1~Nk~
NnIf caliper 10 is detected away from finished product tail length LtFinished size exist overproof, then can calculate LtCorresponding arteries and veins
Rush number Nt=Lt/ △ l, LtIt is the finished product tail length value that bar has dimension overproof, NtIt is corresponding with the overproof length value of afterbody
Number of pulses;
If c. following equation is set up：Nn-Nt-Nk=△N≧0（K ＜ n-1）, and Nn-Nt-Nk+1During ＜ 0, then rod is may determine that
Material afterbody departs from STkRolling mill and after the N number of pulses of △, finished size starts off-gage phenomenon occur, then programmable controller
Since communication network control transmission device is begun through this moment to reduction of speed the upstream stand of finished frame；
If d. k=n-1, i.e. Nt≦Nn-Nn-1, now because bar afterbody has been detached from STn-1Rolling mill, then now again to STn-1
Rolling mill carries out speed and adjusts late, and speed governing opportunity is changed to depart from ST with bar afterbodyn-2Rolling mill simultaneously passes through Nn-1-
N n-2- NtIndividual pulse starts in advance to STn-1Rolling mill carries out speed governing, but mode of speed regulation is different from situation described in k ＜ n-1；
E. function is adjusted to upstream stand speed to disappear from the overproof defect of bar tail dimension, depart from quilt to bar afterbody at the latest
Terminate during controlled rolling machine.
, it is necessary to select speed governing frame in the implementation process of the above method, carried out according to following principle：
If the overproof amplitude of bar afterbody is less, only to STn-1Rolling mill carries out speed governing；
If the overproof amplitude of bar afterbody is bigger than normal, in order to prevent to single-rack significantly reduction of speed formed hightension to bar outside
Shape, such as ovality, adverse effect, then can also be to upstream STn-2~STkRolling mill carries out speed regulating control respectively.
, it is necessary to be controlled to adjustment amount in the implementation process of the above method, carried out according to following principle：
The overproof part of finished size is contrasted with standard size, overproof sectional area △ S are drawn, rolled according to each sortie in production is even pricked
Metal mass flow equal principle processed：The overproof sectional area and finished frame speed product VnEqual to by tune frame STkPass sectional area
Sk（Groove parameter）With speed regulated quantity △ VkProduct, i.e.,：△Vk =△S*Vn/Sk, operating personnel can be according to actual adjustment
Effect is suitably finely tuned as radix to regulating the speed for upstream stand.
To single-rack STn-1The situation of rolling mill speed governing：If afterbody dimension discrepancy is basically identical, using same turn
Fast adjustment amount；If each section of dimension discrepancy difference of afterbody is larger, dimension precision requirement can not be met using same adjustment of rotational speed amount, then
It should be segmented and take different adjustment of rotational speed amounts to be controlled.
To single-rack STn-1Rolling mill speed governing and Nt≦Nn-Nn-1Situation：When to STn-1When rolling mill starts speed governing, rod
The overproof original position of material afterbody just bites STn-1Rolling mill, now STn-1Rolling mill is to finished frame STnBetween rolling mill
Roll part meet size requirement, if now unexpected reduction of speed, the tension increment of generation can be to this part of qualified bar
Have a negative impact（Size diminishes）, take by reduction of speed 0~△ of amplitude Vn-1, the oblique wave time is Lt/VnOblique wave deceleration method should
With working well.
Many rolling mills are participated in the situation of speed governing：The reduction of speed amplitude of each controlled milling train should disappear each controlled frame downstream
The bar size removed it is overproof and play effect all take into account.
In addition, for the rolling line that finished frame upstream is tower-loop control, then above-mentioned direct regulation upstream stand can not be used
The mode of rotating speed.Because according to the rolled metal second flow equal principle followed in rolling production, the reduction of upstream stand rotating speed
It can reduce instant metal mass flow, and then cause the high reduction of set, but upstream machine can be improved in the presence of kink closed-loop control
The rotating speed of frame, so that set up to arrives set-point, the result is that speed regulated quantity is zero, interstand tension is constant, adjustment failure.
Bar tension force can be high anti-by changing kink set in PLC control program between improving the frame with tower-loop control
The method of feedback value is realized.Kink is in stable state in the normal operation of rolling, and now actual set is high covers high level in setting（h0
=Hset）, when the bar afterbody of dimension overproof passes through, control system in time adds a positive tune to the value of feedback of looper height
Whole value △ h, the value of feedback h after adjustment1Set-point H can be more thanset, in the presence of controller, control system can control transmission system
The rotating speed of system reduction upstream stand, looper height, which is reduced, causes the high value of feedback of set after adjustment to be equal to set-point again.Practice card
It is bright：High lower in kink normal range of operation inner sleeve, bar tension force is bigger.The result of upstream stand reduction of speed is bar between frame
Power increases, and bar size reduces.
Because bar tension force is by looper height, bar specification size, rolling temperature, the high setting value of set, kink between kink
The factors such as bleed pressure are relevant, it is impossible to accurately determine to cover the regulated value of high feedback quantity by theoretical calculation.Practical application
In, the corresponding relation between dimension overproof amplitude and set top adjustment value can be determined by transcendental method point bar specification, herein
On the basis of the regulated value for covering high feedback quantity is suitably increased and decreased again according to regulating effect.
Claims (8)
1. a kind of bar continuous rolling eliminates the overproof control device of tail dimension, it is characterised in that：It includes programmable controller
（6）, metal detection element（7）, encoder（8）, communication network（9）, caliper（10）, encoder（8）It is fixed on finisher
Electric machine main shaft afterbody, two metal detection elements（7）Installed in the rear of finisher, caliper（10）Rolled installed in finished product
The rear portion of machine, caliper（10）Positioned at finisher and metal detection element（7）Between, programmable controller（6）With height
Speed counts template and the numeral input template with hardware interrupts function, high speed counting mould and the motor for being fixed on finisher
The encoder of main shaft tail（8）It is connected, two gold with hardware interrupts function digit input template Yu finisher rear
Belong to detecting element（7）It is connected, programmable controller（6）Pass through communication network（9）With each sortie rolling mill drive apparatus（5）
It is connected.
2. bar continuous rolling according to claim 1 eliminates the overproof control device of tail dimension, it is characterised in that：Two gold
Belong to detecting element（7）The distance between be set as L.
3. a kind of bar continuous rolling using above-mentioned control device eliminates the overproof control method of tail dimension, it is characterised in that：It
Carried out using following steps：
A. programmable controller is real-time to encoder by the high speed counting mould carried（8）Pulse is counted, and works as rod
Material（4）After being rolled through each sortie milling train order, to bar head by two metal detection elements（7）When count value difference with
Two metal detection elements（7）Between apart from L carry out computing, calculate the corresponding rod product length △ l of individual pulse；
B. when bar afterbody order departs from ST1~STk~STnDuring milling train, milling train signal is departed from each milling train electricity with bar afterbody
The change of machine power square bust is along judging, programmable controller（6）Encoder at that time is recorded respectively（8）Counted number of pulses N1~
Nk~Nn, caliper（10）If detected away from finished product tail length LtFinished size exist overproof, then can calculate Lt
Corresponding umber of pulse Nt= Lt/ △ l, Lt are the finished product tail length values that bar has dimension overproof, and Nt is and the overproof length of afterbody
The corresponding number of pulses of angle value；
If c. following equation is set up：Nn- Nt-Nk=△N≧0（K ＜ n-1）, and Nn- Nt-Nk+1During ＜ 0, then rod is may determine that
Material afterbody departs from STkRolling mill and after the N number of pulses of △, finished size starts off-gage phenomenon occur, then program controller PLC
Device（6）From beginning through communication network this moment（9）Control transmission device（5）Reduction of speed is started to the upstream stand of finished frame；
If d. k=n-1, i.e. Nt≦Nn-Nn-1, now because bar afterbody has been detached from STn-1Rolling mill, then now again to STn-1Frame
Milling train carries out speed and adjusts late, and speed governing opportunity is changed to depart from ST with bar afterbodyn-2Rolling mill simultaneously passes through Nn-1-N n-2-
NtIndividual pulse starts in advance to STn-1Rolling mill carries out speed governing, but mode of speed regulation is different from situation described in k ＜ n-1；
E. function is adjusted to upstream stand speed to disappear from the overproof defect of bar tail dimension, depart from quilt to bar afterbody at the latest
Terminate during controlled rolling machine.
4. bar continuous rolling according to claim 3 eliminates the overproof control method of tail dimension, it is characterised in that：If rod
The overproof amplitude of material afterbody is little, then only to STn-1Rolling mill carries out speed governing；If the overproof amplitude of bar afterbody is bigger than normal, in order to prevent
To single-rack, significantly reduction of speed formed adverse effect of the hightension to bar profile, and such as ovality then can also be to upstream machine
Frame STn-2~STkRolling mill carries out speed regulating control respectively.
5. bar continuous rolling according to claim 4 eliminates the overproof control method of tail dimension, it is characterised in that：It is determined that nothing
Tower-loop control rolling line adjustment of rotational speed amount, the overproof part of finished size is contrasted with standard size, overproof sectional area △ S, root is drawn
According to each sortie rolled metal second flow equal principle in even bundle production：The overproof sectional area △ S and finished frame speed product Vn
Equal to by tune frame STkPass sectional area SkWith speed regulated quantity △ VkProduct, i.e.,：△Vk =△S*Vn/Sk, operating personnel can
Suitably to be finely tuned to regulating the speed for upstream stand as radix according to actual Adjustment effect.
6. bar continuous rolling according to claim 5 eliminates the overproof control method of tail dimension, it is characterised in that：To single
Frame STn-1The situation of rolling mill speed governing, if afterbody dimension discrepancy is basically identical, using same adjustment of rotational speed amount；If afterbody
Each section of dimension discrepancy difference is larger, can not meet dimension precision requirement using same adjustment of rotational speed amount, then should be segmented and take difference
Adjustment of rotational speed amount be controlled.
7. bar continuous rolling according to claim 6 eliminates the overproof control method of tail dimension, it is characterised in that：To single
Frame STn-1Rolling mill speed governing and Nt≦Nn-Nn-1Situation, when to STn-1When rolling mill starts speed governing, bar afterbody is overproof to be risen
Beginning, position just bit STn-1Rolling mill, now STn-1Rolling mill is to finished frame STnBetween rolling mill is full rolling part
What full size cun was required, if now unexpected reduction of speed, the tension increment of generation can have a negative impact to this part of qualified bar, such as
Size diminishes, and takes by reduction of speed 0~△ of amplitude Vn-1, the oblique wave time is Lt/VnOblique wave deceleration method application effect it is good.
8. bar continuous rolling according to claim 7 eliminates the overproof control method of tail dimension, it is characterised in that：To multi rack
Milling train participates in the situation of speed governing, and the reduction of speed amplitude of each controlled milling train should surpass each controlled frame downstream for the bar size eliminated
Effect that is poor and playing all is taken into account.
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| CN201710502087.6A CN107282647B (en) | 2017-06-27 | 2017-06-27 | Control device and method for eliminating tail size out-of-tolerance in bar continuous rolling |
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| CN201710502087.6A CN107282647B (en) | 2017-06-27 | 2017-06-27 | Control device and method for eliminating tail size out-of-tolerance in bar continuous rolling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113426840A (en) * | 2021-07-16 | 2021-09-24 | 北京佰能盈天科技股份有限公司 | Negative tolerance rolling and short rule control method for bar production line |
| CN113814279A (en) * | 2020-06-21 | 2021-12-21 | 宝山钢铁股份有限公司 | Stabilizing device and method used in visual inspection process of pipe and bar |
| CN116493419A (en) * | 2023-06-27 | 2023-07-28 | 山西建龙实业有限公司 | Flexible control method for rolling micro-tension of tail of hot-rolled steel bar |
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| CN105327948A (en) * | 2015-11-20 | 2016-02-17 | 广东韶钢松山股份有限公司 | Control method for continuous rolling of wire rods and bars |
| CN206854363U (en) * | 2017-06-27 | 2018-01-09 | 石家庄钢铁有限责任公司 | A kind of bar continuous rolling eliminates the overproof control device of tail dimension |
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| CN116493419A (en) * | 2023-06-27 | 2023-07-28 | 山西建龙实业有限公司 | Flexible control method for rolling micro-tension of tail of hot-rolled steel bar |
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