CN102766798B - 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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- CN102766798B CN102766798B CN201210269467.7A CN201210269467A CN102766798B CN 102766798 B CN102766798 B CN 102766798B CN 201210269467 A CN201210269467 A CN 201210269467A CN 102766798 B CN102766798 B CN 102766798B
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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 Techniques, control integration technology, software engineering and automatic technology, particularly the process control method of a kind of sintered NdFeB spun furnace time processing.
Background technology
Sintered NdFeB gets rid of with operation and all plays vital impact for follow-up powder process operation, magnetic field orientating operation and sintering circuit, and so link is dealt with improperly, and the performance to sintered Nd-Fe-B magnetic material is brought to material impact.
Sintered NdFeB is a kind of permanent magnet material, from manufacturing the angle of permanent magnet material, wishes to get rid of and in strap tissue, does not have the dendritic crystalline substance of thick α-Fe.This is because the plasticity of the dendritic crystalline substance of α-Fe is better, makes to get rid of strap and is difficult to fragmentation, to pulverizing process, causes difficulty; Need to extend sintering time to obtain uniform Nd simultaneously
2fe
14b crystal.Meanwhile, as got rid of in strap tissue, have the rich Nd phase of lumps, in the time of can affecting sintering, rich Nd is uniformly distributed mutually.Therefore, getting rid of the desirable microstructure of strap should be to exist without a-Fe, and Nd
2fe
14b 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 larger difference in its microstructure.What under suitable cooling rate, (as roller speed for 23m/s time) can directly obtain better magnetic property gets rid of strap rapid tempering belt.Roller speed is got rid of strap rapid tempering belt for what 25m/s obtained, and significantly subsiding appears in demagnetizing curve, shows that cooling rate is too high, preparation get rid of strap rapid tempering belt in crossing the state of quenching, in subsides roll surface one side, may also have the remaining amorphous of part.Therefore, at Nd
2fe
14in B belt-rejecting technology, key is appropriate design and the rotating speed of controlling metallic copper roller in spun furnace, obtains grain-size and suitably and uniformly gets rid of strap rapid tempering belt.The different trades mark, because raw-material proportioning is different, what under identical speed of cooling, obtain gets rid of strap, and also there is larger difference in its microstructure.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 determines, is by the group of products of the various trades mark is realized to the heat of processing in spun furnace.
At present, the spun furnace of domestic neodymium-iron-boron magnetic material industry is determined still by manually completing by rule of thumb, it is very large that this arrangement is affected by staff's subjectivity, and be difficult to consider the processing parameter of spun furnace: the access times of crucible in spun furnace are, the rated output of the access times of tundish, spun furnace and spun furnace converted products parameter information: product amount, delivery, whether product grade is the conventional trade mark, and 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 with operation for the different trades mark get rid of band roller speed, to improving, get 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 based on client institute fixed output quota product, carry out, in document that charge confirm problem publishes, mainly concentrating on steel industry.Wang Xiaodongs etc. have proposed a kind of improved genetic algorithms method with dynamic state of parameters regulatory function, solve the Automatic Combined stacking of bell-type annealing workshop coil of strip, target is to make the coil of strip weight of actual annealing of each stove and the deviation of the upper limit of heating curve minimum, Liu Ying etc. solve the automatic combination of stacks of steel coils problem in batch annealing, take and minimize heat number as target, do not consider the relation that heat number and stock get the raw materials ready.Rather tree is waited the charge confirm problem solving in steel smelting-continuous casting production in fact, does not consider the relation that the amount of getting the raw materials ready and heat number and stove are heavy.The employing such as Xue Yuncan improves Discrete Particle Swarm Optimization Algorithm and solves the group stove model that heat is counted the steel-making continuous casting integrated production of the unknown, does not consider the relation that stock gets the raw materials ready with remaining material.The optimization design that Wang Wanlei etc. organize stove scheme by steel-making is summed up as a cluster analysis problem that meets the quality factor constraints such as chemical composition, and the method for solving based on particle swarm optimization proposed, the charge confirm problem .Falkenauer E that does not consider stock and get the raw materials ready in situation etc. carries out analogy by combination optimization problem and Bin-Packing problem, think and all belong to a class grouping problem, do not consider stock and the charge confirm problem of getting the raw materials ready in situation.Wang Zhi has just waited and has proposed a kind of self-adapted genetic algorithm that improves and solve 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 and not be inconsistent with sintered NdFeB client product.Lu Kebin etc. be take and minimized remaining material generation and set up the Model for Multi-Objective Optimization of Design for Steel-Making as target, do not consider the relation that stock gets the raw materials ready with remaining material, in the situation of considering to get the raw materials ready, may not remaining material generation the smaller the better.The weight of the supposition slabs such as Peng Pin is all less than heat size, need dosage to be greater than heat size situation with the product of neodymium iron boron manufacturing enterprise and be not inconsistent, the method therefore adopting, does not study the product of the different trades mark of magneticsubstance, for improving, get rid of the heat combinatorial problem with tablet quality, cannot directly apply.
Summary of the invention
The deficiency existing for prior art, the present invention proposes the process control method of a kind of sintered NdFeB spun furnace time processing, with reach improve get rid of carries product quality index, reduce get rid of carries product mass loss, reduce and get rid of the object with the energy dissipation of operation.
The process control method of a kind of sintered NdFeB spun furnace time processing, this control method be take product grade as basis, the trade mark for the product of processing in spun furnace records and monitors, when this product grade when the non-common trade mark becomes the conventional trade mark maybe when this is no longer when commonly using the trade mark, according to the access times of spun furnace interior crucible and tundish, again the inferior stove of spun furnace is heavily set, and heavily product corresponding to each trade mark organized to stove with the stove after setting, according to organized heat, continue the technological process that sintered NdFeB gets rid of band.
When described product grade becomes the conventional trade mark from the non-common trade mark, stove heavily should, according to the access times of spun furnace interior crucible and tundish, be set.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 total degree 60% and more than, 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, and the stove of a discontented stove is reseted the actual sets stove amount that is decided to be this stove; When described product grade is no longer the conventional trade mark, 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 as the actual sets stove amount of this stove.
Described stove weight, should be according to determined product amount, delivery, and whether product grade is the conventional trade mark, the get the raw materials ready amount of this trade mark in getting rid of tape pool, the access times of crucible in spun furnace, and the access times of tundish are set.
Described group stove, the punctual delivery of each heat institute corresponding product of processing in spun furnace of take is target, take in same heat each product grade identical, complete that each amount of product throughput, spun furnace focus in limited range, crucible access times in limited range, tundish access times are constraint condition in limited range, and each client's product is organized to stove;
Judge whether getting the raw materials ready of the corresponding trade mark of each product meets stock and get the raw materials ready, if meet, directly obtain the group furnace accretion fruit of each heat, otherwise, carry out the adjustment that spun furnace number or spun furnace are heavy, to obtain final group furnace accretion fruit;
When the corresponding stove of the trade mark is heavy, do not reach maximum stove when heavy, take that each trade mark gets the raw materials ready in getting rid of tape pool limited range is target, and the spun furnace of take focuses in limited range as retraining, and carries out stove readjust;
When stove weight average corresponding to each trade mark reached maximum stove when heavy, take that each trade mark gets the raw materials ready in getting rid of tape pool limited range is target, and the spun furnace of take focuses in limited range as retraining, and carries out stove and counts adjustment.
Described heavily sets the inferior stove of spun furnace again, need meet following condition:
1) preferentially organize stove principle: when spun furnace time is determined, be the final time of delivery of product delivery date, enterprise's near product at delivery date of giving priority in arranging for, to guarantee product punctual delivery; The priority of the on-the-spot client of institute product, according to client's significance level and this product profit rate situation, is divided into 5 priority.The value of priority is larger, illustrates that priority is higher.For identical product at delivery date, the high priority of giving priority in arranging for; , priority identical for delivery date is identical product also, and giving priority in arranging for, it is little to get rid of band amount.
2) trade mark of the product in group to heat is consistent: product grade is identical, represents that raw material ratio is identical.The identical trade mark of raw material ratio should group in same spun furnace time, the quality index that makes to get rid of the product of taking out of meets client's requirement.
3) according to the access times of crucible in spun furnace, the access times of tundish, whether split delivery of product, the whether conventional trade mark of the trade mark that product is corresponding and the get the raw materials ready situation of the corresponding trade mark of product in getting rid of tape pool, finally determine the stove weight of spun furnace time.
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, according to magneticpolarization coercive force size, 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 the large series products of high-coercive force TH seven very, the trade mark is after every series products segments by maximum magnetic energy product size and the concrete product category obtaining.
The described conventional trade mark, refers within for some time (according to season), and the trade mark demand of the ordered product of statistics client, by the descending arrangement of demand, more than 2 tons, is defined as the conventional trade mark by 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 its microstructure exists larger difference; The different trades mark, what under identical speed of cooling, obtain gets rid of strap, and also there is larger difference in its microstructure.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.Demand, the bound of each trade mark in stock according to site technique constraint and each trade mark product retrains simultaneously, provide different trade mark products and got rid of the charge confirm rule with process for processing, the method effectively improved get rid of carries product remanent magnetism (Br), magneticpolarization coercive force (HCJ) (Hcj), reduce the oxidation of getting rid of carries product and causing because storage period is long, make moist, reduce and get rid of the energy dissipation with operation, obtained the result that makes field staff satisfied.
Accompanying drawing explanation
Fig. 1 is the process control method general flow chart of one embodiment of the present invention sintered NdFeB spun furnace time processing;
Fig. 2 is the schema of one embodiment of the present invention charge confirm.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described in further details.
The spun furnace of Yi Mou neodymium-iron-boron magnetic material enterprise is that (this project obtains state natural sciences fund (No.61174187) to example; The Ministry 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 illustrated, main-process stream is as shown in Figure 1.Specific as follows:
First this control method carries out Back ground Information setting, relates to: the maximum stove of spun furnace is heavy, the port of spun furnace is heavy, in spun furnace in the access times upper limit, spun furnace of crucible 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 conventional trade mark; Next receives production actual achievement information, and the one, spun furnace presence information: the access times of tundish in the access times of crucible, spun furnace in spun furnace, the 2nd, the product information that client is ordered: product amount, delivery, product grade.This control method is to take the product grade of processing in spun furnace to be basis, and present embodiment provides the suction parameter of the process control method of sintered NdFeB spun furnace time processing, 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; Table has comprised each trade mark bound of getting the raw materials ready, and has comprised 3 kinds of trade mark: 35EH, 35H and 35SH, and wherein, trade mark 35H and trade mark 35SH are the conventional trade mark, and 35EH is the non-common trade mark.In present embodiment, the trade mark of the product of processing in spun furnace is recorded and monitored, when product grade becomes the conventional trade mark from the non-common trade mark, stove heavily should, according to the access times of spun furnace interior crucible and tundish, be set.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 not enough total degree of the access times of crucible and tundish 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, and the stove of a discontented stove is reseted the actual sets stove amount that is decided to be this stove; When described product grade is no longer the conventional trade mark, 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 as the actual sets stove amount of this stove.
Whether staff should be that (long order refers to that the ordered product of client has longer delivery date (split delivery or split delivery in a year in half a year) to long order according to product, in product, whether the trade mark is the conventional trade mark, the get the raw materials ready amount of this trade mark in getting rid of tape pool, the demand of client to this trade mark product, the access times of crucible in spun furnace, and the access times of tundish carry out stove reset fixed.Be specially:
(1) if order corresponding to product i is long order, and product i produces in k heat, and tundish access times corresponding to k heat and the not enough total degree of crucible access times 60%, the stove of k heat is heavily the upper limit value M of stove weight
max.As in the present embodiment, the product that No. 6 products are long order, this product is produced in heat 1,2,3,4,5, and 1,2,3,4,5 stove weight is all heavily upper limit M of stove
max.
(2) if the trade mark corresponding to product i is the conventional trade mark, and product i produces in k heat, and detect 60% of tundish access times that k heat is corresponding and the not enough total degree of crucible access times, the stove of k heat is heavily the upper limit value M of stove weight
max.As in the present embodiment, No. 5 products are conventional trade mark product, and this product is produced in heat 6, and the stove of heat 7 is heavily the M of stove weight
max.
(3) if group to the equal non-common trade mark of the corresponding order of the product in the same heat trade mark that all non-long order, each product are corresponding, and each group of products stove amount sum is between minimum and blast furnace is heavy, the weight of this spun furnace time be each group of products stove amount with.As in the present embodiment, No. 1 product and No. 2 products, the all product of non-long order and conventional trade mark product, be combined in heat 7 and produce, if the group stove amount sum of these two products is 400Kg, between minimum and blast furnace is heavy, the tundish access times that now no matter detect and crucible access times account for the per-cent of total access times separately for how many, and the actual production weight of this stove is just 400Kg.
(4) if group to the non-long order of the corresponding order of the product in 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 is when heavy, needs to add and gets the raw materials ready, to reach minimum stove weight.That is: in any one heat, the group stove total amount of client's product adds the amount of getting the raw materials ready, and meets the stove weight that scheduler sets; As in the present embodiment, No. 1 product and No. 2 products, all the product of non-long order and conventional trade mark product, be combined in heat 7 and produce, and each group of products stove amount sum is 195.6Kg, the heavy 300Kg of not enough minimum stove.Now, it is how many that the tundish access times that no matter detect and crucible access times account for the per-cent of total access times separately, and this stove also will be produced 300Kg, to meet minimum stove weight.
Stove carries out group of products stove after heavily determining.The production actual achievement information of the process control method that the spun furnace of take is processed is entry data, take product punctual delivery as target, the product grade of take in same heat is identical, complete each amount of product throughput, spun furnace focuses in limited range is constraint condition, and client's product is organized to stove.
Wherein, the product punctual delivery (being that product is preferentially organized stove rule) of getting rid of band processing of take is target, is specially:
(5) if the d at delivery date of product i
icompared with the d at delivery date of product j
jwant near, product i gives priority in arranging for.As in the present embodiment, the delivery date of product 6 is critical compared with the delivery date of product 4, the product 6. of giving priority in arranging for
(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
ipriority factor A higher than product j
j, product i gives priority in arranging for.As in the present embodiment, the delivery date of product 6 is identical with the delivery date of product 7, but the priority factor of product 6 higher than the priority factor of product 7, the product 6 of 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 product i need turnout w
iwhat be less than product j needs turnout w
j, w gives priority in arranging for
i, wherein, A
i=1,2 ..., within 5 o'clock, represent respectively most important client, Very Important Person, normal client, credit report to the leadship after accomplishing a task client, have record of bad behavior client.As in the present embodiment, the delivery date of product 6 is identical with the delivery 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 is greater than the turnout of product 7, the product 7 of giving priority in arranging for.
Determine after target, the product in present 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 (i.e. the trade mark principle of correspondence of the product in group to heat) in same heat, product grade is identical, has represented that raw material ratio is identical.Only have trade mark group that raw material ratio is identical in same spun furnace time, the quality index of getting rid of the product of taking out of just meets product requirement, is specially:
(8) if product i produces in k heat and product j also produces in k heat, the trade mark of product i is identical with the trade mark of product j.As in the present embodiment, No. 1 product and No. 2 products are all produced in heat 7, and No. 1 product is identical with the trade mark of No. 2 products.
Two of constraint condition: complete the constraint of each amount of product throughput, be specially:
(9) if product i needs turnout to be greater than the upper limit M that spun furnace is heavy
max, the heat sum K that this product needed is produced
ifor needing the integral part of turnout and the heavy peaked ratio of stove, product increases again by 1 stove.As in the present embodiment, the turnout of No. 6 products is 2400Kg, and spun furnace is limited to 580Kg on heavily, and needing total stove number of producing is the integral part 4 that product needs turnout and the heavy peaked ratio of stove, then increases by 1 stove, has 5 stoves altogether.
(10), if product i all has production in several heats, what the turnout summation of this product in these heats equaled this product needs turnout w
i.As in the present embodiment, No. 5 products are produced 40kg in heat 5, in heat 6, produce 117.97Kg, in two heats the turnout of this product and be 157.97Kg, just in time equal the turnout that needs of product.
Three of constraint condition: meet each trade mark stock in getting rid of tape pool constraint rule of getting the raw materials ready, be specially: the requirement of actual field bound of getting the raw materials ready in getting rid of tape pool to each trade mark, within each production cycle, getting rid of with the production program of establishment all will meet the bound requirement of this trade mark in getting rid of tape pool, is specially:
(11), if in this production cycle, there is the trade mark of n product identical; In this production cycle, the amount of getting the raw materials ready of all heats that this n product is corresponding and, the upper limit of getting the raw materials ready in this trade mark is getting rid of tape pool
and lower limit
between.As in the present embodiment, in 7 products of group stove, the trade mark is that the product of 35EH only has No. 1 product and No. 2 products, 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, meets the bound that this trade mark is got the raw materials ready in getting rid of tape pool.
In present 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, determine the process control method of spun furnace time processing as shown in Figure 2, the result of the process control method of spun furnace time processing is as shown in table 4.
First this control method carries out Back ground Information setting, relates to: the maximum stove of spun furnace is heavy, the port of spun furnace is heavy, in spun furnace in the access times upper limit, spun furnace of crucible 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 conventional trade mark; Next receives production actual achievement information, the one, spun furnace presence information: the access times of tundish in the access times of crucible, spun furnace in spun furnace, the 2nd, the product information that client is ordered: product amount, delivery, product grade, finally carry out the group stove of the process control method of spun furnace time processing and realize, concrete steps are as follows:
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 delivery date of the product of processing in spun furnace.
Step 3: if delivery date is identical, according to prioritization, obtain the priority parameters information of the product of processing in spun furnace.
Step 4: if delivery date is identical, priority is also identical, sort according to amount of product throughput, obtain the turnout parameter information of the product of processing in spun furnace.
Step 5: select through first product in the client's Product stack after sequence: product 6.The trade mark that obtains product is: 35SH, amount of product throughput: 2400, product delivery date: 2011-6-28, the order that product is corresponding is long order, the trade mark that product is corresponding be the conventional trade mark and this trade mark in getting rid of tape pool on be limited to 2000Kg, under be limited to the information such as 1000Kg, crucible access times, tundish access times.
Step 6: as shown in Table 2, in spun furnace, the access times of crucible are 20 times, the access times of tundish are 2 times, be less than 60% of maximum access times, and the order that this product is corresponding is long order, the trade mark corresponding to this product is the conventional trade mark, according to (1), the stove of each heat that this product is organized of (2) determining is heavily stove weight upper limit 580Kg.
Step 7: the turnout of this product is greater than spun furnace to be held, (9) and (10) according to, 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 has residue heat size is afterwards 5, residue heat size is 500Kg, upgrades crucible access times and tundish access times parameter information.
Step 8: in judgement queue, whether have the client's product not arranged, if having, turn next step; Otherwise, go to step 31.
Step 9: obtain the next client's product in queue: product 3.Obtaining the trade mark of processing in spun furnace is 35SH, amount of product throughput 160Kg, product delivery date: 2011-2-28, the order that product is corresponding is long order, and crucible access times are less than 60% of total degree, the trade mark that product is corresponding is that the bound that the conventional trade mark and the trade mark are got the raw materials ready in getting rid of tape pool is respectively: 1000Kg, 2000Kg, crucible access times, tundish access times.
Step 10: judgement is organized in heat, has or not the corresponding heat of the product identical with this trade mark.Obtain heat sequence number and the corresponding residue of each heat heat size of identical trade mark product.Known, the trade mark that in heat 5, the corresponding trade mark of product is corresponding with this product is identical, and has residue heat size.According to (8), (4) carry out the group stove of this product;
Step 11: by this product mix in heat 5, because residue heat size 500Kg is greater than product, need turnout 160Kg, therefore this product is all combined in this heat, heat 5 still has residue heat size 340Kg, this client's group of products stove is complete, upgrades crucible access times and tundish access times parameter information.
Step 12:: in judgement queue, whether have the client's product not arranged, if having, turn next step; Otherwise, go to step 31.
Step 13: get the 3rd product of processing after sequence in spun furnace, the trade mark that obtains product is: 35SH, amount of product throughput: 160Kg, product delivery date: 2011-6-28, the non-long order of order that product is corresponding, the trade mark that product is corresponding be the conventional trade mark and this trade mark in getting rid of tape pool on be limited to 2000Kg, under be limited to the information such as 1000Kg, crucible access times, tundish access times.
Step 14: organize in heat, have the product identical with this trade mark.Obtain heat sequence number and the corresponding residue of each heat heat size of identical trade mark product.Known, the trade mark that in heat 5, the corresponding trade mark of product is corresponding with this product is identical, and has residue heat size 200Kg to be greater than the turnout that needs of this product, and crucible access times are less than 60% of total degree.According to (8), (3) carry out the group stove of this product;
Step 15: by this product mix in heat 5, because residue heat size 340Kg is greater than product, need turnout 300Kg, therefore this product is all combined in this heat, heat 5 still has residue heat size 40Kg, this order group stove is complete, upgrades crucible access times and tundish access times parameter information.
Step 16: in judgement queue, whether have the client's product not arranged, if having, turn next step; Otherwise, go to step 31.
Step 17: get the 4th product of processing after sequence in spun furnace, the trade mark that obtains product is: 35SH, amount of product throughput: 157.97Kg, product delivery date: 2011-8-22, the non-long order of order that product is corresponding, the trade mark that product is corresponding be the conventional trade mark and this trade mark in getting rid of tape pool on be limited to 2000Kg, under be limited to the information such as 1000Kg, crucible access times, tundish access times.
Step 18: organize in heat, have the product identical with this trade mark.Obtain heat sequence number and the corresponding residue of each heat heat size of identical trade mark product.Known, the trade mark that in heat 5, the corresponding trade mark of product is corresponding with this product is identical, and has residue heat size 40Kg to be less than the turnout that needs of this product, and crucible access times are less than 60% of total degree.(8) and (3) carry out the group stove of this product according to.
Step 19: need the 40Kg in turnout to be combined in this heat this product, the full stove of heat 5 is produced.It is 117.97Kg that this product still needs turnout, organize heat and add up to 5 stoves, to still need turnout, be combined in the 6th heat, because the corresponding trade mark of this order is the conventional trade mark, therefore according to (2), the maximum stove of this stove is heavily 580Kg, residue heat size 461.03Kg, this order group stove is complete, upgrades crucible access times and tundish access times parameter information.
Step 20: in judgement queue, whether have the client's product not arranged, if having, turn next step; Otherwise, go to step 31.
Step 21: get the 5th product in the product information table after sequence, the trade mark that obtains product is: 35EH, amount of product throughput: 30Kg, product delivery 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, under be limited to the information such as 0Kg, crucible access times, tundish access times.
Step 22: coupling is organized in heat, the not product identical with this trade mark.Statistics has been organized heat sum, and heat number adds 1, obtains the 7th heat, and this product is put in heat 7.(3) and (4) carry out the group stove of this product, according to, because this product needs the not enough 300Kg of turnout, if this trade mark product only has one, during actual production, need to add and gets the raw materials ready, to reach minimum heat size 300Kg.This group of products stove is complete, upgrades crucible access times and tundish access times parameter information.
Step 23: in judgement queue, whether have the client's product not arranged, if having, turn next step; Otherwise, go to step 31.
Step 24: get the 6th product in the product information table after sequence, the trade mark that obtains product is: 35EH, amount of product throughput: 165.6Kg, product delivery 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, under be limited to the information such as 0Kg, crucible access times, tundish access times.
Step 25: organize in heat, have the product identical with this trade mark.Obtain heat sequence number and the corresponding residue of each heat heat size of identical trade mark product.Known, the trade mark that in heat 7, the corresponding trade mark of product is corresponding with this product is identical, and can organize at most the turnout that needs that stove 550Kg is greater than this product, and crucible access times are less than 60% of total degree.(8) and (4) carry out the group stove of this product according to.
Step 26: in heat 7, actual sets stove amount 195.6Kg is less than the lowest manufactured amount 300Kg of heat by 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 upper off-line range corresponding to this trade mark.This group of products stove is complete, upgrades crucible access times and tundish access times parameter information.
Step 27: get the 7th product in the product information table after sequence, the trade mark that obtains product is: 35H, amount of product throughput: 1489.6Kg, product delivery date: 2011-9-16, the non-long order of order that product is corresponding, the trade mark corresponding to product for the conventional trade mark and this trade mark in getting rid of tape pool on be limited to 1000Kg, under be limited to the information such as 500Kg, crucible access times, tundish access times.
Step 28: coupling is organized in heat, the not product identical with this trade mark.Statistics has been organized heat sum, and heat number adds 1, obtains the 8th heat, and this product is put in heat 8.According to the production heat size of (1) and (2) setting heat 8, be 580Kg.(3) and (4) carry out the group stove of this product according to, because needing turnout, this product surpasses 580Kg, and (9) and (10) according to, 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 has residue heat size is afterwards 10, and residue heat size is 250.4Kg, and this group of products stove is complete, upgrades crucible access times and tundish access times parameter information;
Step 30: in judgement queue, whether have the client's product not arranged, if having, turn next step; Otherwise, go to step 31.
Step 31: add up all groups of trade mark kinds that stove product is corresponding, according to the product information table after sequence, trade mark kind is sorted.
Step 32: according to (11), calculate the weight of getting the raw materials ready of each trade mark kind, if all meet the requirement of getting the raw materials ready, go to step 31; Otherwise according to trade mark sequence, statistics does not meet the trade mark of getting the raw materials ready and requiring, and turns next step;
Step 33: select not meet first trade mark of getting the raw materials ready and requiring.The calculating difference of getting the raw materials ready.According to (11), (1), (2), (3), (4) setting spun furnace weight, statistics institute's heat of organizing is total, and sum adds 1, and the production of getting the raw materials ready, goes to step 31;
Step 34: completed the manufacturing process determination of the heat of processing in spun furnace, finished.
Through above-mentioned steps, the heat determining is as shown in table 4.
Table 4 is for the result table of the spun furnace time processing of 7 client's products
Although more than described the specific embodiment of the present invention, one skilled in the art should be appreciated that these only illustrate, and can make various changes or modifications to these embodiments, and not deviate from principle of the present invention and essence.Scope of the present invention is only limited by appended claims.
Claims (1)
1. the process control method of a sintered NdFeB spun furnace time processing, this control method be take product grade as basis, it is characterized in that: the trade mark for the product of processing in spun furnace records and monitors, when this product grade is when the non-common trade mark becomes the conventional trade mark or when no longer for the conventional trade mark, according to the access times of spun furnace interior crucible and tundish, again the inferior stove of spun furnace is heavily set, and heavily product corresponding to each trade mark organized to stove with the stove after setting, according to organized heat, continue the technological process that sintered NdFeB gets rid of band;
When described product grade becomes the conventional trade mark from the non-common trade mark, stove heavily should, according to the access times of spun furnace interior crucible and tundish, be set; 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 total degree 60% and more than, 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, and the stove of a discontented stove is reseted the actual sets stove amount that is decided to be this stove; When described product grade is no longer the conventional trade mark, 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 as the actual sets stove amount of this stove;
Described stove weight, should be according to determined product amount, delivery, and whether product grade is the conventional trade mark, the get the raw materials ready amount of this trade mark in getting rid of tape pool, the access times of crucible in spun furnace, and the access times of tundish are set;
Described group stove, the punctual delivery of each heat institute corresponding product of processing in spun furnace of take is target, take in same heat each product grade identical, complete that each amount of product throughput, spun furnace focus in limited range, crucible access times in limited range, tundish access times are constraint condition in limited range, and each client's product is organized to stove;
Judge whether getting the raw materials ready of the corresponding trade mark of each product meets stock and get the raw materials ready, if meet, directly obtain the group furnace accretion fruit of each heat, otherwise, carry out the adjustment that spun furnace number or spun furnace are heavy, to obtain final group furnace accretion fruit;
When the corresponding stove of the trade mark is heavy, do not reach maximum stove when heavy, take that each trade mark gets the raw materials ready in getting rid of tape pool limited range is target, and the spun furnace of take focuses in limited range as retraining, and carries out stove readjust;
When stove weight average corresponding to each trade mark reached maximum stove when heavy, take that each trade mark gets the raw materials ready in getting rid of tape pool limited range is target, and the spun furnace of take focuses in limited range as retraining, and carries out stove and counts adjustment;
Described heavily sets the inferior stove of spun furnace again, need meet following condition:
1) preferentially organize stove principle: when spun furnace time is determined, be the final time of delivery of product delivery date, enterprise's near product at delivery date of giving priority in arranging for, to guarantee product punctual delivery; The priority of the on-the-spot product of producing, according to client's significance level and this product profit rate situation, is divided into 5 priority; The value of priority is larger, illustrates that priority is higher; For identical product at delivery date, the high priority of giving priority in arranging for; , priority identical for delivery date is identical product also, and giving priority in arranging for, it is little to get rid of band amount;
2) trade mark of the product in group to heat is consistent: product grade is identical, represents that raw material ratio is identical; The identical trade mark of raw material ratio should group in same spun furnace time, the quality index that makes to get rid of the product of taking out of meets client's requirement;
3) according to the access times of crucible in spun furnace, the access times of tundish, whether split delivery of product, the whether conventional trade mark of the trade mark that product is corresponding and the get the raw materials ready situation of the corresponding trade mark of product in getting rid of tape pool, finally determine the stove weight of spun furnace time.
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