CN1253054A - Optimized sizing saw-cutting method for sections - Google Patents
Optimized sizing saw-cutting method for sections Download PDFInfo
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Abstract
An optimized saw-cutting method for large and medium-sized steel sectionf features that the optimal saw-cutting of rolled section is calculated, the optimal saw-cutting sizes are selected, and the hot saw and size-setting stopper are moved under the control of computer according to optimized saw cuttings scheme and mathematical model. Its advantages are saving raw materials and high production benefit.
Description
The present invention relates to a kind of method of big-and-middle-sized shaped steel sawing, specifically in shaped steel sawing technical process, increase best sawing algorithm operation, select optimum sawing shaped steel size combinations, make the residue section after the shaped steel sawing reduce to minimum a kind of sawing method, the i.e. method of shaped steel optimized sizing saw-cutting.
The technological process form of existing domestic and international big-and-middle-sized shape rolling mill finishing production line (rolled piece sawing) is various, no matter be to adopt the scale cooling or adopt long chi process for cooling, conclusion is got up, and the most basic rolled piece sawing technological process is nothing more than being single line flow process type and two-wire flow process type.Its sawing technology all is: rolled piece → one of selection has been located at the fixed ruler baffle of fixed range and has located → put in storage by single size scale sawing → check → bundling, because the automatization level of existing type steel production line is generally lower, the several fixing cut lengths of only a few only can be provided and control with hand control, the method of organizing scale production is to adopt each production time section to get a scale to assign job instruction and carry out sawing basically at every turn, treats to get in addition after this scale quantity is finished a scale again and assigns job instruction until finishing whole scale production schedules.The maximum weak point of this operating type is exactly: one. and can not utilize the means of joining chi to reach the effect that reduces or avoid the generation of the section of residue by a plurality of scales; Two. the user can not can only select in the cut lengths of manufacturer's appointment arbitrarily.Otherwise if factory is for satisfying customer requirements production, no matter general must carrying out by off-line is online or off-line carries out, and all must increase processing cost.If the user can not buy the product of his Len req, so, the user in use not only must further process but also the effective rate of utilization of material can reduce, and the loss of this leftover pieces and waste are very big sometimes.
Theoretically, if certain description, the steel of cut lengths have been selected the blank that matches, its length of rolled piece crop after rolling truncates and can all be cut into needed cut lengths and residue section so, but be to be difficult to accomplish in actual production, this be because: (1) stacks owing to blank for base factory and steel rolling mill itself and managerial reason requirement blank specification has the shared property of certain limit, so can not provide the blank of a lot of length specifications corresponding one by one with product variety specification length, the length that each root blank is shut out is divided exactly by the cut lengths of product; (2) influence the full scale factor of production of steel rolling except base is long, also relevant with factors such as the rolling control of heating scaling loss, rolled piece temperature, mill stiffness, deviation and stable, rolling inhomogeneous deformation and operation, management, does not equally guarantee to roll back length all equally even that is to say that base is heavy yet.Therefore in production reality, generally to produce the residue section after the rolled piece sawing inevitably, also claim non-scale.The generation meeting of residue section brings many severe bad influence to steel rolling mill: (1) its existence means that needs drop into the required scale quantity of more materials ability output, also mean simultaneously the minimizing of scale rate, if the scale rate reduces, the rolling considerable income of minus deviation just reduces thereupon so; (2) price of non-scale product is lower, and it is long to take finished product place and fund, time; (3) residue section is short and different in size, and bundling is difficult for firmly, occupied ground is big, easily deforms at stacking, in the process that hangs, move, Bales Off, and working strength of workers, security risk increase.Therefore, the residue section is the product that makes steel rolling mill's headache and be at pains to avoid.
If only by a length intercepting, its divided evenly probability is just very little so for the single line bar, generally all has the residue section and produce; If it can be gone intercepting by several length section arbitrary combination (containing separately) simultaneously, its divided evenly probability is just very big so.The user buys steel and substantially all orders goods by cut lengths, even same specification also can be ordered several different lengths sometimes, thereby factory must run in the same production cycle after gathering all change releases, and the specification number of producing the cut lengths of same description product generally has many.As previously mentioned, can produce many residue sections inevitably by the sawing of single size scale, if and the different length during the user ordered goods is joined chi optimization, before sawing, one product with different length of increase fits over optimization calculation process together, to reduce the generation of residue section, will be the bigger benefit of factory's generation, simultaneously, also bring many benefits and convenient to the user.
Purpose of the present invention overcomes deficiency of the prior art exactly, and a kind of shaped steel sawing method that significantly reduces residue section after the rolled piece sawing is provided.
The method of shaped steel optimized sizing saw-cutting of the present invention be by the finished product rolled piece behind the mill milling through thermometric survey long after, sawing to rolled piece is optimized sawing calculating, filter out best sawing and join the chi scheme, command mobile hot saw and fixed ruler baffle by computer and corresponding automatic control device then, carry out sawing by best sawing scheme, again warehouse-in after cooling, aligning, check, label, stacking bundling are weighed.Optimizing the sawing Mathematical Modeling is:
Wherein: i=INT (H/ (S+S)); J=INT (H/ (S+D
1)); K=INT (H/ (S+D
2)); M=INT (H/ (S+D
3)); T
0=S+S; T
1=S+D
1T
2=S+D
2T
3=S+D
3δ=INT (C
On/ S); α=INT (C
On/ D
1); β=INT (C
On/ D
2); γ=INT (C
On/ D
3);
In the formula: C
OnBe initially to remain segment length; C "
On, C "
OnmBe to wait to judge the residue segment length; S is the head saw element of contact, and promptly mobile hot saw is the distance of hot saw extremely fixedly; D is auxilliary sawing element, and promptly the scale moving stop is to fixing hot saw distance; H is a rolled piece effective length before the sawing; T is the sawing unit; INT () bracket function expression formula.
Calculation procedure is optimized in sawing:
At first, must determine each production period can hold the number of sawing element according to the work alone quantity of unit of finished product collecting frame, claim that this is " a sawing element capacity ", it is that example is set up (also can increase with increasing again of collecting frame) that Mathematical Modeling is only got four sawing elements;
Secondly, selected main and auxiliary sawing element S and D;
Behind the program start, will record rolled piece finished product length R, effective length H=R-a-b is calculated in cutting head cutting tail value a, b input;
Form each sawing unit T according to selected main and auxiliary sawing element S and D
0=S+D
0, T
1=S+D
1, T
2=S+D
2, T
3=S+D
3If D
0=S, i=INT (H/T
0) the substitution mathematical formulae, other coefficient all is initialized as zero, tries to achieve C
01,
Element D is introduced in the continuous assignment change of coefficient successively
1, D
2, D
3, different sawing element combinations to be found the solution out, its disaggregation is:
(C "
01Or C "
01s, C "
011, C "
012, C "
013... C "
01m)
(C '
01Or C '
01s, C '
011, C '
012, C '
013... C '
01m)
Relatively each in the set is worth, and getting wherein, minimum of a value is C
1, if the factors such as size of identical then coefficient of comparisons sum are chosen:
C
1=min (C '
01Or C '
01s, C '
011, C '
012, C '
013... C '
01m)
Then by certain form, the coefficient of change formula (1) can obtain C
02Value, and by previous processed C
01Way, step handle C
02Value ... thereby obtain second residue section C
2
Compare C
1With C
2Value, if that is little, what then keep this group sawing joins the chi scheme, if the factors such as size of identical then coefficient of comparisons sum choose, to treat and C to be asked
3Relatively.
Then with sawing unit T
0Coefficient successively decrease T simultaneously again
1Coefficient correspondingly increase progressively again, at this moment can obtain a C again
03Value, obtain C according to the method for front then
03And C
3
C
3With the C that keeps previously
1Or C
2Value relatively, get minimum value.
According to above-mentioned rule gradually with sawing unit T
2, T
3Introduce, to the coefficient assignment, coefficient of alteration is obtained the respective value of all different sawing unit combination by constantly, C value relatively, and the chi scheme is joined in the sawing that filters out a best, and joins chi scheme commander hot saw by this and go to carry out sawing and move.
Advantage of the present invention is the residue section that can significantly reduce after the rolled piece sawing, improves productivity effect, brings advantage to the user.
Again the present invention is done detailed explanation below.
By steel product delivery date, description, steel grade, set up the cut lengths production schedules and according to the physical dimension of finishing line equipment and the concrete condition of receptible material length, the cut lengths of steel is divided into several grades of scopes.For example, these computational methods are set at four scopes: long scale section, middle long scale section, normal length scale section and short scale section.
Determine sawing element capacity according to the can work independently quantity of unit or its combination of finished product collecting frame, selected more each sawing element that participates in sawing, selected then sawing unit T promptly advance saw and once cut to such an extent that two scale materials are called a sawing unit T.Running saw is called sawing host element S to the distance of stationary saw, and shear gauge moving stop to the distance of stationary saw is called the auxilliary element D of sawing, so T=S+D or T
i=S+D
i
It is as follows to set up the mathematical formulae of optimizing sawing with four sawing unit:
Coefficient: i=INT (H/ (S+S)) wherein; J=INT (H/ (S+D
1)) k=INT (H/ (S+D
2)); M=INT (H/ (S+D
3)); T
0=S+S; T
1=S+D
1T
2=S+D
2T
3=S+D
3δ=INT (C
On/ S); α=INT (C
On/ D
1); β=INT (C
On/ D
2); γ=INT (C
On/ D
3).
Dispose residue section C with the C rule, the C rule article is as follows:
(1) when being called, C＞=e residue section at this moment independently remains a section C
i, behind back-end crop, send into cold bed;
(2) the residue section when 0＜=C＜=g this moment claims to cast out a residue section C
a, this section is done the back-end crop processing and is cast out to improve the scale rate;
(3) when g＜C＜e at this moment the section of residue be called a parasitic residue section C
p, this section can not be passed through finishing line inadequately because of length, casts out and wastes, and for improving lumber recovery, it is appended on the minimum sawing element of current participation sawing.
Wherein symbol description is as follows:
E: rolled piece can be by the minimum length value of whole piece finishing line; G: permission is made the maximum length value that crop is handled with the section of residue; H: the effective length of rolled piece before the sawing; C
OnOr C
o: initially remain segment length; C "
On, C "
Ons, C "
Onm: residue segment length to be determined; C ' or C '
On, C '
Ons, C '
Onm: accurate residue segment length; C or C
kThe residue that ends segment length; INT (): bracket function expression formula; R: length of rolled piece before the sawing; A: crop length; B: back-end crop length.
Use above-mentioned expression formula to be optimized calculation procedure to be:
At first according to selected main and auxiliary sawing element S of sawing element capacity and D;
Behind the program start, will record rolled piece finished product length R, effective length H=R-a-b is calculated in cutting head cutting tail value a, b input;
Form each sawing unit T according to selected main and auxiliary sawing element S and D
0=S+D
0, T
1=S+D
1, T
2=S+D
2, T
3=S+D
3, establish D=S, i=INT (H/T
0) the substitution mathematical formulae, other coefficient all is initialized as zero, tries to achieve C
01
Element D is introduced in the continuous assignment change of coefficient successively
1, D
2, D
3, different sawing element combinations to be found the solution out, its disaggregation is:
(C "
01Or C "
01s, C "
011, C "
012, C "
013... C "
01m) dispose above disaggregation with the C rule, try to achieve the set of corresponding accurate residue section:
(C '
01Or C '
01s, C '
011, C '
012, C '
013... C '
01m) relatively the set in each the value, getting wherein, minimum of a value is C
1If the factors such as size of identical then coefficient of comparisons sum are chosen:
C
1=min (C '
01Or C '
01s, C '
011, C '
012, C '
013... C '
01m)
Then by previous processed C
01Way, step handle C
02Value ... thereby obtain second residue section C
2
Compare C
1With C
2Value, if that is little, what then keep this group sawing joins the chi scheme, if the factors such as size of identical then coefficient of comparisons sum choose, to treat and C to be asked
3Relatively.
Then with sawing unit T
0Coefficient successively decrease T simultaneously again
1Corresponding again the increasing progressively of coefficient, at this moment can obtain a C again
03Value, obtain C according to the method for front then
03And C
3
C
3With the C that keeps previously
1Or C
3Value relatively, get minimum value.
According to above-mentioned rule gradually with sawing unit T
2, T
3Introduce, to the coefficient assignment, coefficient of alteration is obtained the respective value of all different sawing unit combination by constantly, C value relatively, and the chi scheme is joined in the sawing that filters out a best, and joins chi scheme commander hot saw by this and go to carry out sawing and move.
Fig. 1 is that shaped steel is optimized sawing program circuit sketch.
Advantage of the present invention is the residue section that can greatly reduce after the rolled piece sawing, finds most economical sawing mode, improves sawing operation production capacity and economic benefit, also brings advantage to the user simultaneously. Adopt the big-and-middle shaped steel cutting optimization of the present invention method can make steel scale rate improve 3%～15%, calculate by producing 500000 tons of materials per year, heavy section can increase about 8,800,000 yuan of benefit, and medium section can increase approximately
8,000,000 yuan.
Take the H type steel production line as example, this production line can be produced H200-700 mm H shaped steel. Technological process is as follows behind its finishing mill:
Chi optimization calculating → fixed ruler baffle, hot saw running fix → sawing → cooling → aligning → check → label → stacking bundling → weigh → put in storage are joined in red base → finish rolling → long thermometric → sawing of finished product → survey.
The relevant performance parameter of its disposition and distribution optimization sawing:
The finishing line roller-way, a mobile hot saw, a fixing hot saw, a shear gauge, cold bed, straightener, fixedly cold saw, by 2 wide 12 meters two of that the unit forms, 24 meters wide collecting frames of can work independently, one group of the collecting frame of cold-finish line, computer automation control system etc.
Maximum 24 meters of cut lengths dimension limit, minimum 6 meters, but at 6～24 meters scope stepless speed changing adjustments.
The scale segmentation limit is divided as follows:
18 meters-≤24 meters of long scale sections
12 meters-≤18 meters of middle long scale sections
9 meters-≤12 meters of normal length scale sections
6 meters-≤9 meters of short scale sections
Rolled piece can be by the minimum length e=6 rice of finishing line
Permission is made the maximum length g=1 rice that crop is processed with the section of residue
So: independent residue section Ci＞=6 meters
Cast out residue section Ca＜=1 meter
1 meter＜C of parasitic residue sectionp＜6 meters
Finishing mill outlet rolled piece maximum length is 120 meters
Cut lengths that hence one can see that minimum＞6 meters, sawing unit T minimum＞12 meters, so:
(1) maximum of coefficient i, j, k, m is all less than 10;
(2) maximum of factor alpha, β, γ, δ is all less than 4.
When practical application, to consider expansion coefficients of metal wire, the cutting loss of saw blade, the factors such as offset of the length permissible variation of product standard defined, the general formula of finding the solution C this moment is as follows:
In the formula: ε: thermal linear expansion coefficient
δ: saw blade thickness
τ: the offset of cut lengths permissible variation (τ＜national standard or contract technology
The length permissible variation limiting value of defined in the agreement)
Wherein bis is described as follows:
E: rolled piece can be by the minimum length value of whole piece finishing line; G: permission is made the maximum length value that crop is processed with the section of residue; H: the effective length of rolled piece before the sawing; ConOr Co: initially remain segment length; C "on，C”
ons，C”
onm: residue segment length to be determined; C ' or C 'on，C’
ons，C’
onm: accurate residue segment length; C or CkThe residue that ends segment length; INT (): bracket function expression formula: R: length of rolled piece before the sawing; A: crop length; B: back-end crop length.
The step that is optimized the sawing operation is as follows:
(1). according to the selected main and auxiliary sawing element S of sawing element capacity and D;
(2). behind accompanying drawing 1 program start, will record rolled piece finished product length R, cutting head cutting tail value a, b input is calculated effective length H, H=R-a-b;
(3). form each sawing unit T according to selected main and auxiliary sawing element S and D0＝S+D
0，T
1＝S+D
1，T
2＝S+D
2，T
3＝S+D
3 If D=D0＝S，i＝INT(H/T
0) the substitution mathematical formulae, other coefficient j=INT (H/T1)，k＝INT(H/T
2)，m＝INT(T
3) all be initialized as zero. Try to achieve C01
C
01＝H-INT(H/T
0)*T
0
(3.1) if. C01Less than each sawing element, according to formula (2) C "01＝C
01, dispose with the C rule, obtain C '01 If C01Be not less than each sawing element (or one of them), then:
(3.2) according to formula (3) and formula (4), get C "01s＝C
01-INT(C
01/ S) * S establishes β=0 simultaneously temporarily, and γ=0 is with α=INT (C01/D
1), obtain C "011
C”
011＝C
01-INT(C
01/D
1)；
(3.3) D1The item coefficient subtracts 1, usefulness β=INT ((C "011+D
1)/D
2) make coefficient and introduce D2, obtain C "012：
C”
012＝C
01-(INT(C
01/D
1)-1)*D
1-INT((C”
011+D
1)/D
2)*D
2
If β＜1 then needs factor alpha is deducted 1 again, until β 〉=1;
(3.4) factor alpha is deducted 1 again, and β increases progressively by preceding method is corresponding again, can obtain C "013
C”
013＝C
01-(INT(C
01/D
1)-2)*D
1-INT(C”
011+2D
1)/D
2)*D
2；
(3.5) along with the continuous assignment change of coefficient, introduce again element D3, circulation finds the solution different sawing element combinations out according to this, and its disaggregation is:
(C”
01Or C "01s，C”
011，C”
012，C”
013，……C”
01m)。
(4) dispose disaggregation with the C rule, can try to achieve the set of corresponding accurate residue segment value:
(C '
01Or C '
01s, C '
011, C '
012, C '
013... C '
01m)
Relatively each in the set is worth, and getting wherein, minimum of a value is C
1, if the factors such as size of identical then coefficient of comparisons sum are chosen:
C
1=min (C '
01Or C '
01s, C '
011, C '
012, C '
013... C '
01m)
(5) next use C
01+ T
0With T
1Make comparisons, if INT ((C
01+ T
0)/T
1)＞=1 is then coefficient i=INT (H/T
0) deduct 1, get j=INT ((C then
01+ T
0)/T
1) make coefficient and introduce sawing unit T
1, can try to achieve C
02:
C
02=H-(INT (H/T
0)-1) * T
0-INT ((C
01+ T
0)/T
1) * T
1If j＜1 then needs coefficient i is deducted 1 again, until j 〉=1.
Then by previous processed C
01Way, step handle C
02Value ... thereby obtain second residue section C
2
(6) compare C
1With C
2Value, if that is little, what then keep this group sawing joins the chi scheme, if the factors such as size of identical then coefficient of comparisons sum choose, to treat and C to be asked
3Relatively.
(7) then with sawing unit T
0Coefficient successively decrease T simultaneously again
1Coefficient correspondingly increase progressively again, at this moment can obtain a C again
03Value, obtain C according to the method for front then
03And C
3
C
3With the C that keeps previously
1, C
2Value relatively, get minimum value.
According to above-mentioned rule gradually with sawing unit T
2, T
3Introduce, to the coefficient assignment, coefficient of alteration is obtained the respective value of all different sawing unit combination by constantly, C value relatively, and the chi scheme is joined in the sawing that filters out a best, and joins chi scheme commander hot saw by this and go to carry out sawing and move.
Now simply give one example and be illustrated:
H type steel production line with embodiment is an example
Known this production line class's one day H400 * 200 * 8/13 millimeter (66 kilograms/meter of theoretical substances) 230 tons of H shaped steel of totally 6 cut lengths of arranging production, material Q235; Use 500 * 300 * 120 millimeters special-shaped continuous casting billet, 700 kilograms/meter of theoretical substances, long 11 meters of base, 7700 kilograms of weight; Scaling loss and cut tongue loss and be 2%, the finished product crop is 450 millimeters, back-end crop is 550 millimeters; Sawing element heap(ed) capacity is 4.The list of schedules of the scale of this product of this class production is as follows: table 1
| Cut lengths | ????8 | ????9 | ???10 | ???12 | ???15 | ????20 | Add up to |
| Every weight | ??528 | ??594 | ??660 | ??792 | ??990 | ??1320 | |
| Production quantity | ???40 | ???30 | ???80 | ??100 | ???30 | ????20 | ???300 |
| Frequency | ?13.3 | ???10 | ?26.7 | ?33.3 | ???10 | ???6.7 | ???100 |
| The weight subtotal | 21120 | 17820 | 52800 | 79200 | 29700 | ?26400 | 227040 |
| Length type | Short | Short | General length | General length | Middle long | Long |
Now for can say something the situation (also not considering factors such as hot account shrinkage temporarily) of only enumerating rolling 5 blanks easily, it shuts out length, and effective length is listed as follows: table 2
| The blank sequence number | ????1 | ????2 | ????3 | ????4 | ????5 |
| Shut out length | ????113 | ????114 | ????114.5 | ????105 | ????113 |
| Effective length | ????111 | ????113 | ????113.5 | ????104 | ????112 |
4 types of the cut lengths of this production all have, and according to the frequency of table 1, cut lengths can be used as the sawing host element for 12 meters, 10 meters.So can choose 12 meters for the first time as the sawing host element with simple experience, 8 meters, the 20 meters auxilliary elements of conduct, at this moment, sawing element capacity is 3.Then have:
S=12 D
0=S=12 D
1=8 D
2=20 D
3=(sky)
T
0＝12+12＝24??????????T
1＝12+8＝20
T
2=12+20=32 T
3=(sky)
Now above and given data are imported in this computer software, that finished product is surveyed is long, temperature measurement data be on-line automaticly carry out, the automatic immediate input, load the computer of this software can be immediately abridged table 3 sawing optimizations join the chi scheme, the data in the table are the quantity of each sawing unit of obtaining of sawing, sawing element and residue segment length (m), attribute.Table 3
| The blank sequence number | ???T 0??24m | ???T 1??20m | ???T 2??32m | ??T 3???m | ????S ??12m | ???D 1???8m | ???D 2??20m | ?D 3??m | Residue segment length (m) |
| ????1 | ????0 | ????0 | ????3 | ????0 | ????1 | ????0 | ????7(C i) | ||
| ????2 | ????2 | ????0 | ????2 | ????0 | ????0 | ????0 | ????1(C a) | ||
| ????3 | ????0 | ????0 | ????3 | ????0 | ????1 | ????0 | ????9.5(C p) | ||
| ????4 | ????0 | ????0 | ????3 | ????0 | ????1 | ????0 | ????0 | ||
| ????5 | ????2 | ????0 | ????2 | ????0 | ????0 | ????0 | ????0 |
If still carry out sawing by traditional method, so, the situation of residue segment length sees Table 4 after above-mentioned 5 blank sawings: table 4 (unit: m)
| Cut lengths is selected | Blank is selected | Residue section total length | The scale Volume Composition | ||||
| ????1# ??(111m) | ????2# ??(113m) | ????3# ??(113.5) | ????4# ??(104m) | ????5# ??(112m) | |||
| ????20 | ????11 | ????13 | ????13.5 | ????24 | ????12 | ??73.5 | ????24 |
| ????12 | ????15 | ????17 | ????17.5 | ????8 | ????16 | ??73.5 | ????40 |
| ????8 | ????7 | ????1 | ????9.5 | ????0 | ????0 | ??17.5 | ????67 |
Now, can from above data to the sawing operation through the conventional method of optimization and not optimizing carry out simply, technical economic analysis roughly, comparison:
1. the data of table 3 show residue section that how no matter rolling the cut lengths of finished product length, selection to change its generation for minimum, and table 4 is quite different, has 67% data poorer than what optimize, and wherein, only the situation of 8 meters short scales is better.
2. can be extrapolated roughly by the data statistics of table 4: the finished product of on average whenever obtaining 20m, a 12m, 8m by conventional method respectively can produce 3.06 meters, 1.84 meters, 0.26 meter long residue section.Again as shown in Table 3, by 5 blanks of prioritization scheme sawing obtain altogether 20 meters, 12 meters, 8 meters finished product each 13,21,3, produce 17.5 meters of residue sections altogether, produce 79.2 meters residue section (13 * 3.06+21 * 1.84+3 * 0.26=79.2 (m)) if obtain these by conventional method with the then big appointment of volume production product, the residue section has increased by 61.7 meters; The scale rate of 5 blanks of this example can improve about 9.71%.
3. obtain the product of table 3 quantity, must advance saw through measuring and calculating just can finish for 29 times, if by traditional method sawing through by the data measuring and calculating of table 4 then must advance saw and just can finish for 32 times, increased by 3 times, the sawing operation generally all is the bottlenecks in producing, therefore, adopt and optimize the production capacity that sawing can reduce saving sawing number of times, improve the sawing operation, reduce the loss of metal sawing and saw blade.
Claims (2)
1, a kind of method of big-and-middle-sized shaped steel optimized sizing saw-cutting, it is characterized in that rolled piece is after surveying long thermometric, the computer that this program is housed is optimized sawing to the sawing of rolled piece and calculates, filter out best sawing and join the chi scheme, then, computer commands mobile hot saw and fixed ruler baffle to carry out sawing by best sawing scheme by automation control system, optimizes the sawing formula of mathematical to be:
Wherein: i=INT (H/ (S+S)); J=INT (H/ (S+D
1)); K=INT (H/ (S+D
2)); M=INT (H/ (S+D
3)); T
0=S+S; T
1=S+D
1T
2=S+D
2T
3=S+D
3δ=INT (C
On/ S); α=INT (C
On/ D
1); β=INT (C
On/ D
2); γ=INT (C
On/ D
3);
In the formula: C
OnBe initially to remain segment length; C "
On, C "
OnmBe to wait to judge the residue segment length; S is the head saw element of contact, and promptly mobile hot saw is the distance of hot saw extremely fixedly; D is auxilliary sawing element, and promptly the scale moving stop is to fixing hot saw distance; H is a rolled piece effective length before the sawing; T is the sawing unit; INT () bracket function expression formula.
2. shaped steel according to claim 1 is optimized sawing method, it is characterized in that sawing optimization calculation procedure is:
At first according to selected main and auxiliary sawing element S of sawing element capacity and D;
Behind the program start, will record rolled piece finished product length R, effective length H=R-a-b is calculated in cutting head cutting tail value a, b input;
Form each sawing unit T according to selected main and auxiliary sawing element S and D
0=S+D
0, T
1=S+D
1, T
2=S+D
2, T
3=S+D
3, establish D
0=S, i=INT (H/T
0) the substitution mathematical formulae, other coefficient all is initialized as zero, tries to achieve C
01,
Element D is introduced in the continuous assignment change of coefficient successively
1, D
2, D
3, different sawing element combinations to be found the solution out, its disaggregation is:
(C "
01Or C "
01s, C "
011, C "
012, C "
013... C "
1m)
Dispose above disaggregation with the C rule, try to achieve the set of corresponding accurate residue section:
(C '
01Or C '
01s, C '
011, C '
012, C '
013... C '
01m)
Relatively each in the set is worth, and getting wherein, minimum of a value is C
1, if the factors such as size of identical then coefficient of comparisons sum are chosen:
C
1=min (C '
01Or C '
01s, C '
011, C '
012, C '
013... C '
01m)
Then by previous processed C
01Way, step handle C
02Value ... thereby obtain second residue section C
2
Compare C
1With C
2Value, if that is little, what then keep this group sawing joins the chi scheme, if the factors such as size of identical then coefficient of comparisons sum choose, to treat and C to be asked
3Relatively.
Then with sawing unit T
0Coefficient successively decrease T simultaneously again
1Coefficient increase progressively again, at this moment can obtain a C again
03Value, obtain C according to the method for front then
03And C
3
C
3With the C that keeps previously
1Or C
2Value relatively, get minimum value.
According to above-mentioned rule gradually with sawing unit T
2, T
3Introduce, to the coefficient assignment, coefficient of alteration is obtained the respective value of all different sawing unit combination by constantly, C value relatively, and the chi scheme is joined in the sawing that filters out a best, and joins chi scheme commander hot saw by this and go to carry out sawing and move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111549A CN1083740C (en) | 1998-10-30 | 1998-10-30 | Optimized sizing saw-cutting method for sections |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111549A CN1083740C (en) | 1998-10-30 | 1998-10-30 | Optimized sizing saw-cutting method for sections |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1253054A true CN1253054A (en) | 2000-05-17 |
| CN1083740C CN1083740C (en) | 2002-05-01 |
Family
ID=5221522
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98111549A Expired - Fee Related CN1083740C (en) | 1998-10-30 | 1998-10-30 | Optimized sizing saw-cutting method for sections |
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| Country | Link |
|---|---|
| CN (1) | CN1083740C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102764911A (en) * | 2012-07-19 | 2012-11-07 | 莱芜钢铁集团有限公司 | Sizing and sawing system |
| CN104408283A (en) * | 2014-10-21 | 2015-03-11 | 南京钢铁股份有限公司 | Blank model selection method of single sizing plate in medium plate rolling |
| CN106599402A (en) * | 2016-11-29 | 2017-04-26 | 天威保变（秦皇岛）变压器有限公司 | MATLAB-based suit cutting and splicing calculation method for silicon steel sheets |
| CN112197722A (en) * | 2020-09-15 | 2021-01-08 | 石横特钢集团有限公司 | Method for inspecting overall dimension of steel |
| CN112756692A (en) * | 2020-12-25 | 2021-05-07 | 天津市中重科技工程有限公司 | Cold sawing process for section steel |
| CN113238529A (en) * | 2021-05-17 | 2021-08-10 | 莱芜钢铁集团电子有限公司 | Bar sawing combined model |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4017976A (en) * | 1974-07-03 | 1977-04-19 | Barr Anthony J | Apparatus and method for maximum utilization of elongated stock |
-
1998
- 1998-10-30 CN CN98111549A patent/CN1083740C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102764911A (en) * | 2012-07-19 | 2012-11-07 | 莱芜钢铁集团有限公司 | Sizing and sawing system |
| CN104408283A (en) * | 2014-10-21 | 2015-03-11 | 南京钢铁股份有限公司 | Blank model selection method of single sizing plate in medium plate rolling |
| CN104408283B (en) * | 2014-10-21 | 2017-05-24 | 南京钢铁股份有限公司 | Blank model selection method of single sizing plate in medium plate rolling |
| CN106599402A (en) * | 2016-11-29 | 2017-04-26 | 天威保变（秦皇岛）变压器有限公司 | MATLAB-based suit cutting and splicing calculation method for silicon steel sheets |
| CN106599402B (en) * | 2016-11-29 | 2019-08-02 | 天威保变（秦皇岛）变压器有限公司 | Silicon steel sheet based on MATLAB cuts out a piece of cloth in a way with the minimum material to make two or more articles of clothing patch calculation method |
| CN112197722A (en) * | 2020-09-15 | 2021-01-08 | 石横特钢集团有限公司 | Method for inspecting overall dimension of steel |
| CN112197722B (en) * | 2020-09-15 | 2022-01-04 | 石横特钢集团有限公司 | Method for inspecting overall dimension of steel |
| CN112756692A (en) * | 2020-12-25 | 2021-05-07 | 天津市中重科技工程有限公司 | Cold sawing process for section steel |
| CN113238529A (en) * | 2021-05-17 | 2021-08-10 | 莱芜钢铁集团电子有限公司 | Bar sawing combined model |
| CN113238529B (en) * | 2021-05-17 | 2022-09-13 | 莱芜钢铁集团电子有限公司 | Bar sawing combined model |
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| Publication number | Publication date |
|---|---|
| CN1083740C (en) | 2002-05-01 |
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