CN102766798A - Process control method for secondary processing of sintered NdFeB in quick-setting furnace - Google Patents
Process control method for secondary processing of sintered NdFeB in quick-setting furnace Download PDFInfo
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- CN102766798A CN102766798A CN2012102694677A CN201210269467A CN102766798A CN 102766798 A CN102766798 A CN 102766798A CN 2012102694677 A CN2012102694677 A CN 2012102694677A CN 201210269467 A CN201210269467 A CN 201210269467A CN 102766798 A CN102766798 A CN 102766798A
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Abstract
A process control method for secondary processing of sintered NdFeB in a quick-setting furnace belongs to the field of information technology. On the basis of product grades, grades of products processed in the quick-setting furnace are recorded and monitored. When the product grades change from non-common grades into common grades or are not the common grades any more, weight of casting strip heat is re-set according to the number of usage of an inner crucible and a tundish of the quick-setting furnace. Products in the corresponding grades are charged according to the set weight, and the NdFeB casting strips are sintered continuously according to the number of charges. Residual magnetism (Br) and magnetic polarization intensity coercive force (intrinsic coercive force) (Hcj) of the casting strips are increased effectively, oxidation and damp of the casting strips due to long-term placement are reduced, energy waste in quick-setting process is reduced, and results satisfying field staff are achieved.
Description
Technical field
The invention belongs to areas of information technology, relate to modern integrated manufacturing technology, control integration technology, software engineering and automatic technology, the process control method of particularly a kind of sintered NdFeB spun furnace time processing.
Background technology
Sintered NdFeB gets rid of the band operation and all plays fundamental influence for follow-up powder process operation, magnetic field orientating operation and sintering circuit, and so link is dealt with improperly, will bring material impact to the performance of sintered Nd-Fe-B magnetic material.
Sintered NdFeB is a kind of permanent magnet material, from making the angle of permanent magnet material, hopes to get rid of not have the dendritic crystalline substance of thick α-Fe in the strap tissue.This is because the plasticity of the dendritic crystalline substance of α-Fe is better, makes to get rid of strap and be difficult to fragmentation, causes difficulty to pulverizing process; Need prolong sintering time simultaneously to obtain uniform Nd
2Fe
14The B crystal.Simultaneously, as get rid of and have the rich Nd phase of lumps in the strap tissue, rich Nd phase uniform distribution in the time of then can influencing sintering.Therefore, getting rid of strap ideal microstructure should be that no a-Fe exists, and Nd
2Fe
14The B main phase grain is tiny, and rich Nd is evenly distributed mutually.Yet, the identical trade mark, different cooling get rid of strap, there is bigger difference in its microstructure.What (like roller speed for 23m/s time) can directly obtain preferable magnetic property under the suitable cooling rate gets rid of the strap rapid tempering belt.Roller speed is got rid of the strap rapid tempering belt for what 25m/s obtained, and significantly subsiding appears in demagnetizing curve, shows that cooling rate is too high, and the strap rapid tempering belt that gets rid of of preparation was in the state of quenching, and possibly also have the remaining amorphous of part in subsides roll surface one side.Therefore, at Nd
2Fe
14In the B belt-rejecting technology, key is appropriate design and the rotating speed of controlling metallic copper roller in the spun furnace, obtains grain-size and suitably and uniformly gets rid of the strap rapid tempering belt.The different trades mark, because of raw-material proportioning is different, what under identical speed of cooling, obtain gets rid of strap, and its microstructure also exists than big-difference.Therefore, for obtaining the consistent product of magnetic property, the rotating speed of the metallic copper roller of the identical trade mark should be identical.
What spun furnace was inferior confirms, is to realize to the heat of in spun furnace, processing through the group of products with the various trades mark.
At present; The spun furnace of domestic neodymium-iron-boron magnetic material industry is confirmed still to be accomplished by rule of thumb by manual work; It is very big that this arrangement mode is influenced by staff's subjectivity; And be difficult to take all factors into consideration the processing parameter of spun furnace: the rated output of the access times of the access times of crucible, tundish, spun furnace and spun furnace converted products parameter information in the spun furnace: product amount; Delivery, whether product grade is the trade mark commonly used, the get the raw materials ready amount of this trade mark in getting rid of tape pool carried out the inferior optimization setting of spun furnace.Therefore study the process control method of sintered NdFeB spun furnace time processing; The spun furnace of optimizing, fully excavate get rid of the band operation to the different trades mark get rid of band roller speed, raising is got rid of the quality index of strap and the quality index of the finished product has very great practical significance and wide application prospect.
Both at home and abroad carry out mainly concentrating on steel industry in the document that the heat problem identificatioin publishes based on client institute fixed output quota article.Wang Xiaodongs etc. have proposed a kind of improvement genetic algorithm with parameter dynamic conditioning function; Solve the Automatic Combined stacking of bell-type annealing workshop coil of strip; Target is to make that the deviation of the upper limit of actual annealed coil of strip weight and heating curve of each stove is minimum; Liu Ying etc. solve the coil of strip shove charge optimum combination problem in the batch annealing, are target to minimize the heat number, do not consider the relation that heat number and stock get the raw materials ready.The amount of getting the raw materials ready and heat number and the heavy relation of stove are considered in the rather real heat problem identificatioin that waits in the production of solution steel smelting-continuous casting of tree.Employings such as Xue Yuncan improve the group stove model that the discrete particle colony optimization algorithm is found the solution the unknown steel-making continuous casting integrated production of heat number, do not consider stock's relation with surplus material of getting the raw materials ready.Wang Wanlei etc. organize stove scheme optimization design with steel-making and are summed up as a cluster analysis problem that satisfies quality factor constraint such as chemical ingredients; And the method for solving based on particle swarm optimization proposed; Do not consider that stock and the heat problem identificatioin .Falkenauer E under the situation of getting the raw materials ready etc. carry out analogy with shove charge combinatorial problem and one dimension bin packing; Think all to belong to one type of grouping problem, do not consider stock and the heat problem identificatioin of getting the raw materials ready under the situation.Wang Zhi has just waited and has proposed a kind of self-adapted genetic algorithm that improves and find the solution the coil of strip combination stacking optimization problem of cover annealing in producing; This Study on Problems be that arbitrary coil of strip can only occur once in all loading furnace process, can appear in a plurality of heats with sintered NdFeB client product not to be inconsistent.Lu Kebin etc. are the Model for Multi-Objective Optimization that target is set up steel-making group stove problem to minimize surplus material generation, do not consider stock's relation with surplus material of getting the raw materials ready, and are under the situation of considering to get the raw materials ready, may not surplus material generation more little good more.The weight of supposition such as Peng Pin slab is all less than heat size; Need dosage not to be inconsistent greater than the heat size situation with the product of neodymium iron boron manufacturing enterprise, the method that is therefore adopted is not studied the product of the different trades mark of magneticsubstance; Get rid of the heat combinatorial problem of strap quality for raising, can't directly use.
Summary of the invention
To the deficiency that prior art exists, the present invention proposes the process control method of a kind of sintered NdFeB spun furnace time processing, improves the quality index of getting rid of carries product, the mass loss that carries product is got rid of in minimizing, the purpose that reduces the energy dissipation of getting rid of the band operation to reach.
The process control method of a kind of sintered NdFeB spun furnace time processing; This control method is the basis with the product grade; The trade mark for product processed in the spun furnace writes down and monitors, when this product grade is become the commonly used trade mark by the non-common trade mark maybe when this no longer when using the trade mark always, according to the access times of spun furnace interior crucible and tundish; Again the inferior stove of spun furnace is heavily set; And heavily the corresponding product of each trade mark is organized stove with the stove after setting, and according to the group heat, the technological process that the continuation sintered NdFeB gets rid of band.
When described product grade became the commonly used trade mark by the non-common trade mark, stove heavily should be set according to the access times of spun furnace interior crucible and tundish.When the group stove amount of each trade mark product, a discontented stove or full stove are produced the discontented stove of last stove after some heats, and the access times of crucible and tundish reach more than 60% of total degree reaches, and stove is reseted the upper limit that is decided to be specified heat size; When the group stove amount of each trade mark product, a discontented stove or full stove are produced the discontented stove of last stove after some heats, and the access times of crucible and tundish reach the less than 60% of total degree, are discontented with the stove of a stove and reset the actual sets stove amount that is decided to be this stove; Described product grade no longer is when using the trade mark always, and when the group stove amount of each trade mark product, last stove that a discontented stove or full stove are produced after some heats is discontented with a stove, and stove heavily should be set at the actual sets stove amount of this stove.
Described stove is heavy, should be according to institute's fixed output quota article quantity, and delivery, whether product grade is the trade mark commonly used, the get the raw materials ready amount of this trade mark in getting rid of tape pool, the access times of crucible in the spun furnace, and the access times of tundish are set.
Described group of stove; Punctual delivery with each heat institute corresponding product of processing in the spun furnace is a target; Identical with each product grade in the same heat, accomplish that each amount of product throughput, spun furnace focus in the limited range, the crucible access times in limited range, the tundish access times are constraint condition in limited range, and each client's product is organized stove;
Judge whether getting the raw materials ready of the corresponding trade mark of each product is satisfied the stock and got the raw materials ready, if satisfy the group furnace accretion fruit that then directly obtains each heat, otherwise, carry out the heavy adjustment of spun furnace number or spun furnace, to obtain final group furnace accretion fruit;
Do not reach maximum stove when heavy when the corresponding stove of the trade mark is heavy, getting the raw materials ready in getting rid of the tape pool limited range with each trade mark is target, and focusing in the limited range with spun furnace is constraint, carries out the stove readjust;
When the corresponding stove weight average of each trade mark has reached maximum stove when heavy, getting the raw materials ready in getting rid of the tape pool limited range with each trade mark is target, and focusing in the limited range with spun furnace be constraint, carries out the adjustment of stove number.
Describedly again the stove of spun furnace time is heavily set, need be satisfied following condition:
1) preferentially organize the stove principle: when spun furnace time was confirmed, be the final time of delivery of product dilivery date, and enterprise's near product at delivery date of giving priority in arranging for is to guarantee the product punctual delivery; The priority of the on-the-spot client of institute product is divided into 5 priority according to client's significance level and this product profit rate situation.The value of priority is big more, explains that priority is high more.For identical product at delivery date, the high priority of giving priority in arranging for; The product identical for delivery date, that priority is also identical, giving priority in arranging for, it is little to get rid of the band amount.
2) it is consistent to organize the trade mark of a product in the heat: product grade is identical, represents raw material ratio identical.The trade mark that raw material ratio is identical should be organized in the same spun furnace time, makes the quality index of getting rid of the product of taking out of satisfy requirement of client.
3) according to the access times of crucible in the spun furnace, whether the corresponding trade mark of the whether split delivery of the access times of tundish, product, product the trade mark commonly used and the get the raw materials ready situation of the corresponding trade mark of product in getting rid of tape pool, confirms that finally the stove of spun furnace time is heavy.
The magnetic property of described trade mark reaction sintering neodymium iron boron magnetic body, the remanent magnetism (Br), magneticpolarization coercive force (HCJ) that comprises permanent magnet material (Hcj), magnetic induction density coercive force (Hcb) and maximum magnetic energy product ((BH) max).Wherein, Be divided into low-coercivity N, medium coercive force M, high-coercive force H, extra-high-speed coercive force SH, ultra-high coercive force UH, high coercive force EH and high-coercive force TH seven big series products very according to magneticpolarization coercive force size, the trade mark is after every series products segments by the maximum magnetic energy product size and the concrete product category that obtains.
The described trade mark commonly used is meant in for some time (according to season), and the trade mark demand of the ordered product of statistics client with the descending arrangement of demand, more than 2 tons, is confirmed as the trade mark commonly used with demand.
Beneficial effect of the present invention: the present invention is according to the strap that gets rid of of the identical trade mark, different cooling, and there is bigger difference in its microstructure; The different trades mark, what obtain under the identical speed of cooling gets rid of strap, and its microstructure also exists than big-difference.Therefore, for obtaining the consistent product of magnetic property, the rotating speed of the metallic copper roller of the identical trade mark should be identical.The on-the-spot process constraint of foundation and each trade mark product demand amount, each trade mark bound constraint in the stock simultaneously; Provided the definite rule of heat that different trade mark products get rid of the band process for processing; This method effectively improved the remanent magnetism (Br) that gets rid of carries product, magneticpolarization coercive force (HCJ) (Hcj), reduce and get rid of carries product owing to the long oxidation that causes storage period, make moist; Reduce the energy dissipation of getting rid of the band operation, obtained the result who makes the field staff satisfied.
Description of drawings
Fig. 1 is the process control method general flow chart of one embodiment of the present invention sintered NdFeB spun furnace time processing;
The schema that Fig. 2 confirms for one embodiment of the present invention heat.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present invention is explained further details.
Spun furnace with certain neodymium-iron-boron magnetic material enterprise is that (this project obtains state natural sciences fund (No.61174187) to example; Board of Education's basic scientific research operating cost (No.N110208001); Northeastern University's initial funding (No.29321006) is supported), the process control method of sintered NdFeB spun furnace time processing is explained that main-process stream is as shown in Figure 1.Specific as follows:
This control method is at first carried out the Back ground Information setting, relates to: the maximum stove of spun furnace is heavy, the port of spun furnace is heavy, the access times upper limit of tundish, mark, the get the raw materials ready amount upper limit and the get the raw materials ready amount lower limit of each trade mark in getting rid of tape pool of the trade mark commonly used in the access times upper limit, spun furnace of crucible in the spun furnace; Next receives production actual achievement information, and the one, spun furnace presence information: the access times of tundish in the access times of crucible, the spun furnace in the spun furnace, the 2nd, the product information that the client orders: product amount, delivery, product grade.This control method is that the product grade with processing in spun furnace is the basis, and this embodiment provides the suction parameter of the process control method of sintered NdFeB spun furnace time processing, and is as shown in table 1.
The production actual achievement information of the process control method of table 1 sintered NdFeB spun furnace time processing
The Back ground Information table of the process control method of table 2 sintered NdFeB spun furnace time processing
In the production actual achievement information table of table 1, have 7 products, wherein product 4,6 and 7 is long order; Comprised each trade mark bound of getting the raw materials ready in the table, comprised 3 kinds of trade mark: 35EH, 35H and 35SH, wherein, trade mark 35H and trade mark 35SH are the trade mark commonly used, and 35EH is the non-common trade mark.The trade mark to product processed in spun furnace in this embodiment writes down and monitors, and when product grade became the commonly used trade mark by the non-common trade mark, stove heavily should be set according to the access times of spun furnace interior crucible and tundish.When the group stove amount of each trade mark product, a discontented stove or full stove are produced the discontented stove of last stove after some heats, and the access times of crucible and tundish deficiency total degree 60%, stove is reseted the upper limit that is decided to be specified heat size; When the group stove amount of each trade mark product, a discontented stove or full stove are produced the discontented stove of last stove after some heats, and the access times of crucible and tundish reach 60% of total degree, are discontented with the stove of a stove and reset the actual sets stove amount that is decided to be this stove; Described product grade no longer is when using the trade mark always, and when the group stove amount of each trade mark product, last stove that a discontented stove or full stove are produced after some heats is discontented with a stove, and stove heavily should be set at the actual sets stove amount of this stove.
Whether the staff should be that (long order is meant that the product that the client orders has long delivery date (split delivery or split delivery in a year in half a year) to long order according to product; Whether the trade mark is the trade mark commonly used in the product; The get the raw materials ready amount of this trade mark in getting rid of tape pool; The client is to this trade mark product demand amount, the access times of crucible in the spun furnace, and the access times of tundish carry out stove reset fixed.Be specially:
(1) if the corresponding order of product i is long order, and product i produces in k heat, and the tundish access times of k heat correspondence and crucible access times deficiency total degree 60%, then the stove of k heat heavily is the upper limit value M that stove weighs
MaxAs in this embodiment, No. 6 products are the product of long order, and this product is produced in heat 1,2,3,4,5, and then 1,2,3,4,5 stove is heavy all is the heavy upper limit M of stove
Max
(2) if the corresponding trade mark of product i is the trade mark commonly used, and product i produces in k heat, and detects 60% of corresponding tundish access times of k heat and crucible access times deficiency total degree, and then the stove of k heat heavily is the upper limit value M that stove weighs
MaxAs in this embodiment, No. 5 product is trade mark product commonly used, and this product is produced in heat 6, and then the stove of heat 7 heavily is the heavy M of stove
Max
(3) if organize all non-long order of the corresponding order of product in the same heat, all non-common trade mark of the trade mark that each product is corresponding, and each group of products stove amount sum is between minimum and blast furnace is heavy, then the weight of this spun furnace time be each group of products stove amount and.As in this embodiment; No. 1 product and No. 2 products, all the product of non-long order and trade mark product commonly used are combined in the heat 7 and produce; If the group stove amount sum of these two products is 400Kg; Between minimum and blast furnace is heavy, then this moment no matter detected tundish access times account for separately with the crucible access times how much per-cent of total access times is, the actual production weight of this stove is 400Kg just.
(4) if organize the non-long order of the corresponding order of product in the same heat, the non-common trade mark of the trade mark that product is corresponding, and the not enough minimum stove of each group of products stove amount sum needs to add and get the raw materials ready when heavy, and is heavy to reach minimum stove.That is: the group stove total amount of client's product adds the amount of getting the raw materials ready in any heat, and the stove that satisfies scheduler's setting is heavy; As in this embodiment, No. 1 product and No. 2 products, all product of non-long order and trade mark product commonly used are combined in the heat 7 and produce, and each group of products stove amount sum is 195.6Kg, the heavy 300Kg of not enough minimum stove.At this moment, no matter detected tundish access times and crucible access times account for separately how much per-cent of total access times is, this stove also will be produced 300Kg, and is heavy to satisfy minimum stove.
Stove carries out the group of products stove after heavily confirming.Production actual achievement information with the inferior process control method of processing of spun furnace is entry data; With the product punctual delivery is target; Identical with product grade in the same heat, accomplish each amount of product throughput, spun furnace focuses in the limited range is constraint condition, and client's product is organized stove.
Wherein, be target to get rid of band product processed punctual delivery (being that product is preferentially organized the stove rule), be specially:
(5) if the d at delivery date of product i
iD at delivery date than product j
jWant near, product i then gives priority in arranging for.As in this embodiment, be critical the product 6. of then giving priority in arranging for the dilivery date of the dilivery date of product 6 than product 4
(6) if the d at delivery date of product i
iD at delivery date with product j
jIdentical, and the priority factor A of product i
iThe priority factor A that is higher than product j
j, product i then gives priority in arranging for.As in this embodiment, the dilivery date of product 6 is identical with the dilivery date of product 7, but the priority factor of product 6 is higher than the priority factor of product 7, the product 6 of then giving priority in arranging for.
(7) if the d at delivery date of product i
iD at delivery date with product j
jIdentical, and the priority factor A of product i
iEqual the priority factor A of product j
j, and the need turnout w of product i
iNeed turnout w less than product j
j, w then gives priority in arranging for
i, wherein, A
i=1,2 ..., represented respectively in 5 o'clock most important client, Very Important Person, normal client, credit report to the leadship after accomplishing a task the client, the record of bad behavior client is arranged.As in this embodiment, the dilivery date of product 6 is identical with the dilivery date of product 7, if the priority factor of product 6 is also identical with the priority factor of product 7, but the turnout of product 6 greater than the turnout of product 7, the product 7 of then giving priority in arranging for.
After confirming target, the product in this embodiment according to above-mentioned target, is sorted, obtain table 3.
Table 3 gets rid of carries product heat processing sequence
One of constraint condition: product grade identical (promptly organizing the trade mark principle of correspondence of a product in the heat) in the same heat, product grade is identical, has represented raw material ratio identical.Have only the identical trade mark group of raw material ratio in same spun furnace time, the quality index of getting rid of the product of taking out of just satisfies product requirement, is specially:
(8) if product i produces in k heat and product j also produces in k heat, then the trade mark of product i is identical with the trade mark of product j.As in this embodiment, No. 1 product and No. 2 products are all produced in heat 7, and then No. 1 product is identical with the trade mark of No. 2 products.
Two of constraint condition: accomplish the constraint of each amount of product throughput, be specially:
(9) if product i needs turnout greater than the heavy upper limit M of spun furnace
Max, the heat sum K that produces of this product needed then
iFor needing the integral part of turnout and the heavy peaked ratio of stove, product increases by 1 stove again.As in this embodiment, the turnout of No. 6 products is 2400Kg, and spun furnace is limited to 580Kg on heavily, and the total stove number that then need produce is the integral part 4 that product needs turnout and the heavy peaked ratio of stove, increases by 1 stove again, has 5 stoves altogether.
(10) if product i all has production in several heats, then the turnout summation of this product in these several heats equals the need turnout w of this product
iAs in this embodiment, No. 5 products are produced 40kg in heat 5, in heat 6, produce 117.97Kg, then in two heats the turnout of this product and be 157.97Kg, just in time equal the need turnout of product.
Three of constraint condition: satisfy each trade mark stock in getting rid of tape pool constraint rule of getting the raw materials ready; Be specially: actual field is to the requirement of the get the raw materials ready bound of each trade mark in getting rid of tape pool; In each production cycle; Getting rid of of establishment is with the production program all will satisfy the bound requirement of this trade mark in getting rid of tape pool, is specially:
(11) if in this production cycle, have the trade mark of n product identical; Then should be in the production cycle; The amount of getting the raw materials ready of all heats that this n product is corresponding with, getting rid of between the upper limit
and lower limit
of getting the raw materials ready in the tape pool at this trade mark.As in this embodiment; In 7 products of group stove, the trade mark is that the product of 35EH has only No. 1 product and No. 2 products, and need the get the raw materials ready amount of this trade mark product in getting rid of tape pool is [0; 1000]; No. 1 product and No. 2 product mixes are in heat 7, and the amount of getting the raw materials ready of this heat is 104.4Kg, satisfies the bound that this trade mark is got the raw materials ready in getting rid of tape pool.
In this embodiment; The Back ground Information of the process control method of the production actual achievement information of the process control method of the sintered NdFeB spun furnace of associative list 1 time processing and time processing of table 2 spun furnace; The process control method of confirming spun furnace time processing is as shown in Figure 2, and the result of the process control method of spun furnace time processing is as shown in table 4.
This control method is at first carried out the Back ground Information setting, relates to: the maximum stove of spun furnace is heavy, the port of spun furnace is heavy, the access times upper limit of tundish, mark, the get the raw materials ready amount upper limit and the get the raw materials ready amount lower limit of each trade mark in getting rid of tape pool of the trade mark commonly used in the access times upper limit, spun furnace of crucible in the spun furnace; Next receives production actual achievement information; The one, spun furnace presence information: the access times of tundish in the access times of crucible, the spun furnace in the spun furnace; The 2nd, the product information that the client orders: product amount, delivery, product grade; Carry out the group stove of the process control method of spun furnace time processing at last and realize that concrete steps are following:
Step 1: initiation parameter, heat k=1, product serial number i=1, the heavy upper limit M of spun furnace stove
Max, the heavy lower limit M of spun furnace stove
Min, time span T, the crucible access times upper limit, the tundish access times upper limit.
Step 2: sort the delivery date by product, obtains parameter information dilivery date of product processed in spun furnace.
Step 3:,, obtain the priority parameters information of product processed in spun furnace then according to prioritization if delivery date is identical.
Step 4: if delivery date is identical, priority is also identical, then sorts according to amount of product throughput, obtains the turnout parameter information of product processed in spun furnace.
Step 5: select through first product in the client's product formation after the ordering: product 6.The trade mark that obtains product is: 35SH; Amount of product throughput: 2400; Product dilivery date: 2011-6-28; The order that product is corresponding is long order, and the trade mark that product is corresponding is used the trade mark and this trade mark always and is limited to 2000Kg in getting rid of tape pool, is limited to information such as 1000Kg, crucible access times, tundish access times down.
Step 6: can know by table 2; The access times of crucible are 20 times in the spun furnace; The access times of tundish are 2 times, and less than 60% of maximum access times, and the corresponding order of this product is long order; The trade mark that this product is corresponding is the trade mark commonly used, and the stove of each heat that this product is organized of then determining according to ⑴, ⑵ heavily is stove weight upper limit 580Kg.
Step 7: the turnout of this product holds greater than spun furnace, and according to ⑼ and ⑽, this product will be organized 5 stoves; Be respectively: heat 1:580Kg, heat 2:580Kg, heat 3:580Kg; Heat 4:580Kg, heat 5:80Kg, obtaining this group of products stove heat that the residue heat size is arranged afterwards is 5; The residue heat size is 500Kg, upgrades crucible access times and tundish access times parameter information.
Step 8: judge in the formation whether client's product of not arranged is arranged,, change next step if having; Otherwise, go to step 31.
Step 9: obtain the next client's product in the formation: product 3.Obtaining the trade mark of in spun furnace, processing is 35SH; Amount of product throughput 160Kg; Product dilivery date: 2011-2-28; The order that product is corresponding be long order, and the crucible access times are less than 60% of total degree, and the trade mark that product is corresponding is to use the bound that the trade mark and the trade mark get the raw materials ready always to be respectively in getting rid of tape pool: 1000Kg, 2000Kg, crucible access times, tundish access times.
Step 10: judgement is organized in the heat, has or not the pairing heat of the product identical with this trade mark.Obtain the heat sequence number and the corresponding residue of each heat heat size of identical trade mark product.Can know that the trade mark that the corresponding trade mark of product and this product are corresponding in the heat 5 is identical, and the residue heat size is arranged.Carry out the group stove of this product according to ⑻, ⑷;
Step 11: with this product mix in heat 5; 500Kg needs turnout 160Kg greater than product because of the residue heat size, so this product all is combined in this heat, heat 5 still has residue heat size 340Kg; This client's group of products stove finishes, and upgrades crucible access times and tundish access times parameter information.
Step 12:: judge in the formation whether client's product of not arranged is arranged,, change next step if having; Otherwise, go to step 31.
Step 13: get the 3rd product of in spun furnace, processing after the ordering; The trade mark that obtains product is: 35SH; Amount of product throughput: 160Kg; Product dilivery date: 2011-6-28, the non-long order of order that product is corresponding, the trade mark trade mark commonly used that product is corresponding and this trade mark are limited to 2000Kg in getting rid of tape pool, are limited to information such as 1000Kg, crucible access times, tundish access times down.
Step 14: organize in the heat, the product identical with this trade mark arranged.Obtain the heat sequence number and the corresponding residue of each heat heat size of identical trade mark product.Can know that the trade mark that the corresponding trade mark of product and this product are corresponding in the heat 5 is identical, and have and remain the need turnout of heat size 200Kg that the crucible access times are less than 60% of total degree greater than this product.Carry out the group stove of this product according to ⑻, ⑶;
Step 15: with this product mix in heat 5; 340Kg needs turnout 300Kg greater than product because of the residue heat size, so this product all is combined in this heat, heat 5 still has residue heat size 40Kg; This order group stove finishes, and upgrades crucible access times and tundish access times parameter information.
Step 16: judge in the formation whether client's product of not arranged is arranged,, change next step if having; Otherwise, go to step 31.
Step 17: get the 4th product of in spun furnace, processing after the ordering; The trade mark that obtains product is: 35SH; Amount of product throughput: 157.97Kg; Product dilivery date: 2011-8-22, the non-long order of order that product is corresponding, the trade mark trade mark commonly used that product is corresponding and this trade mark are limited to 2000Kg in getting rid of tape pool, are limited to information such as 1000Kg, crucible access times, tundish access times down.
Step 18: organize in the heat, the product identical with this trade mark arranged.Obtain the heat sequence number and the corresponding residue of each heat heat size of identical trade mark product.Can know that the trade mark that the corresponding trade mark of product and this product are corresponding in the heat 5 is identical, and have and remain the need turnout of heat size 40Kg that the crucible access times are less than 60% of total degree less than this product.Carry out the group stove of this product according to ⑻ and ⑶.
Step 19: need the 40Kg in the turnout to be combined in this heat this product, make heat 5 full stove productions.It is 117.97Kg that this product still needs turnout, has organized heat and has add up to 5 stoves, will still need turnout; Be combined in the 6th heat, because the corresponding trade mark of this order is for the trade mark commonly used, so according to ⑵; The maximum stove of this stove heavily is 580Kg; Residue heat size 461.03Kg, this order group stove finishes, and upgrades crucible access times and tundish access times parameter information.
Step 20: judge in the formation whether client's product of not arranged is arranged,, change next step if having; Otherwise, go to step 31.
Step 21: get the 5th product in the product information table after the ordering; The trade mark that obtains product is: 35EH; Amount of product throughput: 30Kg; Product dilivery date: 2011-9-2, the non-long order of order that product is corresponding, the non-common trade mark of the trade mark that product is corresponding and this trade mark in getting rid of tape pool on be limited to 1000Kg, be limited to information such as 0Kg, crucible access times, tundish access times down.
Step 22: coupling is organized in the heat, not the product identical with this trade mark.Statistics has been organized the heat sum, and the heat number adds 1, obtains the 7th heat, and this product is put in the heat 7.Carry out the group stove of this product according to ⑶ and ⑷,,, then during actual production, need to add and get the raw materials ready, to reach minimum heat size 300Kg if this trade mark product only has one because of this product needs the not enough 300Kg of turnout.This group of products stove finishes, and upgrades crucible access times and tundish access times parameter information.
Step 23: judge in the formation whether client's product of not arranged is arranged,, change next step if having; Otherwise, go to step 31.
Step 24: get the 6th product in the product information table after the ordering; The trade mark that obtains product is: 35EH; Amount of product throughput: 165.6Kg; Product dilivery date: 2011-9-5, the non-long order of order that product is corresponding, the non-common trade mark of the trade mark that product is corresponding and this trade mark in getting rid of tape pool on be limited to 1000Kg, be limited to information such as 0Kg, crucible access times, tundish access times down.
Step 25: organize in the heat, the product identical with this trade mark arranged.Obtain the heat sequence number and the corresponding residue of each heat heat size of identical trade mark product.Can know that the trade mark that the corresponding trade mark of product and this product are corresponding in the heat 7 is identical, and can organize the need turnout of stove 550Kg greater than this product at most, the crucible access times are less than 60% of total degree.Carry out the group stove of this product according to ⑻ and ⑷.
Step 26: in heat 7, actual sets stove amount 195.6Kg is less than the lowest manufactured amount 300Kg of heat with this product mix.Consider the non-long order of the corresponding order of this product, the corresponding non-common trade mark of the trade mark of product and the get the raw materials ready requirement of the corresponding trade mark of product in getting rid of tape pool; The corresponding heat of this trade mark is produced minimum heat size 300Kg; During actual production; The amount of getting the raw materials ready of adding is: 104.4Kg, and in the scope that on this trade mark correspondence, rolls off the production line.This group of products stove finishes, and upgrades crucible access times and tundish access times parameter information.
Step 27: get the 7th product in the product information table after the ordering; The trade mark that obtains product is: 35H; Amount of product throughput: 1489.6Kg; Product dilivery date: 2011-9-16, the non-long order of order that product is corresponding, the corresponding trade mark of product for the trade mark commonly used and this trade mark in getting rid of tape pool on be limited to 1000Kg, be limited to information such as 500Kg, crucible access times, tundish access times down.
Step 28: coupling is organized in the heat, not the product identical with this trade mark.Statistics has been organized the heat sum, and the heat number adds 1, obtains the 8th heat, and this product is put in the heat 8.The production heat size of setting heat 8 according to ⑴ and ⑵ is 580Kg.Carry out the group stove of this product according to ⑶ and ⑷, surpass 580Kg because of this product needs turnout, according to ⑼ and ⑽, this product will be organized 3 stoves, be respectively: heat 8:580Kg, heat 9:580Kg, heat 10:329.6Kg.
Step 29: obtaining this group of products stove heat that the residue heat size is arranged afterwards is 10, and the residue heat size is 250.4Kg, and this group of products stove finishes, and upgrades crucible access times and tundish access times parameter information;
Step 30: judge in the formation whether client's product of not arranged is arranged,, change next step if having; Otherwise, go to step 31.
Step 31: add up the corresponding trade mark kind of all group stove products, trade mark kind is sorted according to the product information table after the ordering.
Step 32: according to ⑾, calculate the weight of getting the raw materials ready of each trade mark kind,, go to step 31 if all satisfy the requirement of getting the raw materials ready; Otherwise according to trade mark sequence, statistics does not satisfy the trade mark of getting the raw materials ready and requiring, and changes next step;
Step 33: select not satisfy first trade mark of getting the raw materials ready and requiring.The calculating difference of getting the raw materials ready.It is heavy to set spun furnace according to ⑾, ⑴, ⑵, ⑶, ⑷, and the statistics institute heat of organizing is total, and sum adds 1, and the production of getting the raw materials ready goes to step 31;
Step 34: the technology of having accomplished the heat of in spun furnace, processing is confirmed, finishes.
Through above-mentioned steps, confirm that good heat is as shown in table 4.
Table 4 is to the table as a result of the spun furnace time processing of 7 client's products
Though more than described embodiment of the present invention, the one skilled in the art should be appreciated that these only illustrate, and can make numerous variations or modification to these embodiments, and not deviate from principle of the present invention and essence.Scope of the present invention is only limited appended claims.
Claims (5)
1. the process control method of a sintered NdFeB spun furnace time processing; This control method is the basis with the product grade; It is characterized in that: the trade mark for product processed in the spun furnace writes down and monitors, when this product grade is become the commonly used trade mark by the non-common trade mark or when no longer for the trade mark commonly used, according to the access times of spun furnace interior crucible and tundish; Again the inferior stove of spun furnace is heavily set; And heavily the corresponding product of each trade mark is organized stove with the stove after setting, and according to the group heat, the technological process that the continuation sintered NdFeB gets rid of band.
2. the process control method of sintered NdFeB spun furnace according to claim 1 time processing; It is characterized in that: when described product grade becomes the commonly used trade mark by the non-common trade mark; Stove heavily should be set according to the access times of spun furnace interior crucible and tundish; When the group stove amount of each trade mark product, a discontented stove or full stove are produced the discontented stove of last stove after some heats, and the access times of crucible and tundish reach more than 60% of total degree reaches, and stove is reseted the upper limit that is decided to be specified heat size; When the group stove amount of each trade mark product, a discontented stove or full stove are produced the discontented stove of last stove after some heats, and the access times of crucible and tundish reach the less than 60% of total degree, are discontented with the stove of a stove and reset the actual sets stove amount that is decided to be this stove; Described product grade no longer is when using the trade mark always, and when the group stove amount of each trade mark product, last stove that a discontented stove or full stove are produced after some heats is discontented with a stove, and stove heavily should be set at the actual sets stove amount of this stove.
3. the process control method of sintered NdFeB spun furnace according to claim 2 time processing; It is characterized in that: described stove is heavy, should be according to institute's fixed output quota article quantity, delivery; Whether product grade is the trade mark commonly used; The get the raw materials ready amount of this trade mark in getting rid of tape pool, the access times of crucible in the spun furnace, and the access times of tundish are set.
4. the process control method of sintered NdFeB spun furnace according to claim 1 time processing; It is characterized in that: described group of stove; Punctual delivery with each heat institute corresponding product of processing in the spun furnace is a target; Identical with each product grade in the same heat, accomplish that each amount of product throughput, spun furnace focus in the limited range, the crucible access times in limited range, the tundish access times are constraint condition in limited range, and each client's product is organized stove;
Judge whether getting the raw materials ready of the corresponding trade mark of each product is satisfied the stock and got the raw materials ready, if satisfy the group furnace accretion fruit that then directly obtains each heat, otherwise, carry out the heavy adjustment of spun furnace number or spun furnace, to obtain final group furnace accretion fruit;
Do not reach maximum stove when heavy when the corresponding stove of the trade mark is heavy, getting the raw materials ready in getting rid of the tape pool limited range with each trade mark is target, and focusing in the limited range with spun furnace is constraint, carries out the stove readjust;
When the corresponding stove weight average of each trade mark has reached maximum stove when heavy, getting the raw materials ready in getting rid of the tape pool limited range with each trade mark is target, and focusing in the limited range with spun furnace be constraint, carries out the adjustment of stove number.
5. the process control method of sintered NdFeB spun furnace according to claim 1 time processing is characterized in that: describedly again the stove of spun furnace time is heavily set, need be satisfied following condition:
1) preferentially organize the stove principle: when spun furnace time was confirmed, be the final time of delivery of product dilivery date, and enterprise's near product at delivery date of giving priority in arranging for is to guarantee the product punctual delivery; The priority of the on-the-spot product of producing is divided into 5 priority according to client's significance level and this product profit rate situation; The value of priority is big more, explains that priority is high more; For identical product at delivery date, the high priority of giving priority in arranging for; The product identical for delivery date, that priority is also identical, giving priority in arranging for, it is little to get rid of the band amount;
2) it is consistent to organize the trade mark of a product in the heat: product grade is identical, represents raw material ratio identical; The trade mark that raw material ratio is identical should be organized in the same spun furnace time, makes the quality index of getting rid of the product of taking out of satisfy requirement of client;
3) according to the access times of crucible in the spun furnace, whether the corresponding trade mark of the whether split delivery of the access times of tundish, product, product the trade mark commonly used and the get the raw materials ready situation of the corresponding trade mark of product in getting rid of tape pool, confirms that finally the stove of spun furnace time is heavy.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103942448A (en) * | 2014-04-29 | 2014-07-23 | 东北大学 | Magnetic material production charge design method |
| CN110490383A (en) * | 2019-08-19 | 2019-11-22 | 辽宁工程技术大学 | A kind of integration production charging plan optimization method based on slab cluster |
| CN110766253A (en) * | 2018-07-27 | 2020-02-07 | 宝山钢铁股份有限公司 | Steelmaking quantity distribution control method for steelmaking continuous casting planned logistics flow direction setting |
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| CN101786146A (en) * | 2009-12-30 | 2010-07-28 | 东北大学 | Online steelmaking continuous casting control method |
| CN102117359A (en) * | 2010-12-30 | 2011-07-06 | 河海大学常州校区 | Method for arranging heat in steel making continuous casting production process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101786146A (en) * | 2009-12-30 | 2010-07-28 | 东北大学 | Online steelmaking continuous casting control method |
| CN102117359A (en) * | 2010-12-30 | 2011-07-06 | 河海大学常州校区 | Method for arranging heat in steel making continuous casting production process |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103942448A (en) * | 2014-04-29 | 2014-07-23 | 东北大学 | Magnetic material production charge design method |
| CN103942448B (en) * | 2014-04-29 | 2017-02-08 | 东北大学 | Magnetic material production charge design method |
| CN110766253A (en) * | 2018-07-27 | 2020-02-07 | 宝山钢铁股份有限公司 | Steelmaking quantity distribution control method for steelmaking continuous casting planned logistics flow direction setting |
| CN110766253B (en) * | 2018-07-27 | 2023-04-18 | 宝山钢铁股份有限公司 | Steelmaking quantity distribution control method for steelmaking continuous casting planned logistics flow direction setting |
| CN110490383A (en) * | 2019-08-19 | 2019-11-22 | 辽宁工程技术大学 | A kind of integration production charging plan optimization method based on slab cluster |
| CN110490383B (en) * | 2019-08-19 | 2022-12-13 | 辽宁工程技术大学 | Integrated production heat plan optimization method based on slab clustering |
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