Partitioned charging and discharging method for roller hearth quenching furnace

Abstract

The invention relates to a partitioned charging and discharging method for a roller hearth quenching furnace, belongs to the technical field of plate heat treatment, and solves the problem of low application efficiency of a roller hearth furnace in the prior art. A roller hearth type quenching furnace partitioned charging and discharging method comprises the steps that S1, virtual partitioning is conducted according to the physical partitioning size of a roller hearth furnace and the type of a plate to be produced; according to the sequence of the virtual partitions, plate material preparation is carried out in sequence, and the real length of each virtual partition is obtained through calibration; s2, after plate feeding is completed, driving motors of the roller hearth furnace and the charging roller bed operate at the same time, and the aluminum alloy plate is driven to enter the furnace to be heated; and S3, after the plates are fed into the furnace and heated through the roller hearth type quenching furnace, the plates in the multiple subareas are sequentially discharged out of the furnace according to the heating time needed by the plates in the subareas. Reasonable partition and sequential charging and discharging of the plates are achieved, and the use efficiency of the roller hearth furnace is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plate heat treatment, and particularly relates to a partition loading and discharging method of a roller hearth quenching furnace. BACKGROUND

[0002] For aluminum plates with a thickness greater than 4 mm, they are generally referred to as medium plates. The quenching heat treatment process of the medium plates is usually carried out on a roller hearth quenching furnace. In general, the aluminum alloy plates of the same batch entering the furnace are of the same alloy and the same thickness.

[0003] In order to improve the use efficiency of the roller hearth furnace, sometimes some plates of the same alloy but different thicknesses need to be simultaneously produced in the furnace. The heating time of the plates of different thicknesses is different. The heating time of the thinner plates is short, and the heating time of the thicker plates is long. Therefore, the thinner plates need to be discharged from the furnace first, and the thicker plates need to be discharged from the furnace after the heating time meets the requirement.

[0004] In order to solve the problem of low use efficiency of the roller hearth furnace, a method is needed to combine the physical partitions to form multiple virtual partitions, so as to realize the constraint of the aluminum alloy plates of different thicknesses in different virtual partitions, and to realize the separate discharging of the aluminum alloy plates in different virtual partitions, thereby effectively improving the use efficiency of the furnace. SUMMARY

[0005] In view of the above analysis, the present application aims to provide a partition loading and discharging method of a roller hearth quenching furnace, so as to solve the problem of low use efficiency of the existing roller hearth furnace.

[0006] The main purpose of the present application is achieved by the following technical scheme:

[0007] A partition loading and discharging method of a roller hearth quenching furnace, comprising:

[0008] Step S1: virtual partitioning according to the physical partition size of the roller hearth furnace and the type of the plates to be produced; sequentially preparing the plates according to the order of the virtual partitions; loading the prepared plates onto the loading roller; comparing the actual prepared length with the prepared length of each virtual partition; calibrating the real length of each virtual partition to determine the real partition length corresponding to each plate;

[0009] Step S2: after the plate loading is completed, the drive motor of the roller hearth furnace and the loading roller is simultaneously operated to drive the aluminum alloy plates into the furnace for heating;

[0010] Step S3: after the plates enter the furnace and are heated by the roller hearth quenching furnace, the plates in multiple partitions are sequentially discharged from the furnace according to the required heating time of the plates in each partition.

[0011] Further, in the step S1, the virtual partitioning is performed in the following manner:

[0012] Step S11: sort the current plates to be produced according to thickness from high to low;

[0013] Step S12: for the plates with thickness difference ≤5%, they are considered as the same thickness, which is defined as nominal thickness; the value of the nominal thickness is taken from the maximum thickness of the plates with the same nominal thickness;

[0014] Step S13: for the plates with the same nominal thickness, they can be divided into the same virtual partition, and a plurality of virtual partitions are arranged in turn according to the heating time of the plates from short to long, and the corresponding plates are prepared to the loading roller.

[0015] Further, in the step S3: since the thickness of the plates in each virtual partition is different, the heating time is different, the thinner plates have shorter heating time and are discharged first; after the plates in each virtual partition meet the heating time, they are discharged in turn, and when a virtual partition is performing discharging operation, the remaining virtual partitions which do not meet the heating time continue to swing and heat.

[0016] Further, in the step S2, the plate loading method is:

[0017] Step S21: after the furnace door is opened to the position, the drive motors of all virtual partitions of the loading roller and the roller hearth are operated at the same loading speed to drive the plates to enter the furnace in sequence;

[0018] Step S22: when the material signal of the laser sensor arranged at the furnace head of the roller hearth disappears, it can be judged that all the plates have entered the furnace at this time, the loading is completed, the drive motors of all virtual partitions of the loading roller and the roller hearth are stopped, the furnace door is closed, and the roller hearth starts heating;

[0019] Further, in the step S2, the swing method of each virtual partition in the roller hearth is:

[0020] Step S23: after the plates in each virtual partition enter the furnace, the drive motors of each virtual partition of the roller hearth are operated in the opposite direction of the loading direction at the swing speed;

[0021] Step S24: when the laser sensor in the running direction of the plates in each virtual partition detects a material signal or the actual swing distance L b is greater than the set swing length L b , all the drive motors of the virtual partition are immediately operated in the opposite direction of the original operating direction at the swing speed.

[0022] Further, in the step S3, the virtual partitions which have not yet reached the heating time continue to swing in the respective virtual partitions at the swing speed, and do not interfere with the virtual partitions which are performing discharging operation.

[0023] Further, in the steps S1-S3, a laser sensor is arranged on each partition interface of the charging roller and the roller hearth furnace, which can detect whether the aluminum alloy plate is placed in the charging roller width direction or each furnace section of the roller hearth furnace; when the sensor detection area is blocked by the plate, the sensor sends a material signal.

[0024] Further, in the step S1, the virtual partition simultaneously acts on the roller hearth furnace and the charging roller, so that the virtual partitions of the two are consistent; the driving motors in each virtual partition are grouped and divided and kept synchronous operation, and the driving motors in different virtual partitions are not synchronized.

[0025] Further, in the step S1, the length of each physical partition of the roller hearth furnace is Q1, Q2, Q3…Q k+1 , Q k+2 , Q k+3 …Q n , and the total length of the roller hearth furnace is ΣQ.

[0026] Further, the length of each virtual partition is F1, F2, F3…F n , and the length of the virtual partition is the sum of a plurality of continuous physical partitions.

[0027] The technical scheme of the present application can at least achieve one of the following effects:

[0028] 1. The roller hearth quenching furnace partition charging and discharging method optimizes the production process, takes "virtual partition-real partition length calibration-partition synchronous feeding and discharging" as the core process, divides the virtual partition according to the thickness of the plate (the thickness difference is less than or equal to 5% of the nominal thickness), combines the laser sensor to dynamically calibrate the real partition, realizes the accurate adaptation of plates with different processes, and solves the problems of poor process adaptability and low production efficiency of traditional fixed partition process.

[0029] 2. The roller hearth quenching furnace partition charging and discharging method can realize the simultaneous discharging of aluminum alloy plates in the same partition by restraining aluminum alloy plates with different thicknesses in different virtual partitions of the roller hearth furnace, effectively improving the use efficiency of the furnace while ensuring the consistency of the plate process. Compared with the traditional roller hearth furnace which only loads according to the physical partition, it can take into account both "process consistency" and "space utilization", and the virtual partition can be dynamically expanded according to the actual material quantity, which can ensure the uniformity of the heating process of the plates in the same partition, avoid the waste of furnace space caused by the size difference of the plates, and realize the advantage of the unity of "process adaptation" and "space utilization".

[0030] 3. The partition loading and discharging method of the roller hearth quenching furnace of the present application improves the space utilization and maximizes the utilization of the furnace space by establishing the spatial arrangement strategy of the plate in the width and length directions of the roller hearth furnace; at the same time, the remaining material re-partition mechanism is designed to avoid material waste and adapt to small-batch and multi-specification production scenes.

[0031] 4. The partition loading and discharging method of the roller hearth quenching furnace of the present application adopts the linkage control mode of "furnace-roller partition synchronization" and "synchronous motor in the same zone and asynchronous motor in different zones", and combines with the real-time detection of the material state by the laser sensor to realize the sequential feeding and discharging according to the heating time, avoid the process waiting caused by the synchronous operation of the whole furnace, improve the production efficiency and ensure the consistency of the heating quality.

[0032] In the present application, the above technical solutions can also be combined with each other to realize more preferred combination solutions. Other features and advantages of the present application will be described in the subsequent specification, and some advantages will become apparent from the specification or be understood by implementing the present application. The purpose and other advantages of the present application can be realized and obtained from the contents specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the description serve to explain the principles of the present application. In the drawings:

[0034] Figure 1 It is a schematic diagram of the roller hearth quenching furnace system of the present application;

[0035] Figure 2 It is a schematic diagram of the material partition arrangement on the loading roller of the roller hearth quenching furnace of the present application;

[0036] Figure 3 It is a schematic diagram of the material partition arrangement on the roller hearth furnace of the roller hearth quenching furnace of the present application;

[0037] Figure 4 It is a flowchart of the partition loading and discharging method of the roller hearth quenching furnace of the present application.

[0038] Figure 5 It is a flowchart of the virtual partition division and loading roller preparation of the roller hearth quenching furnace of the present application;

[0039] Figure 6 It is a flowchart of the furnace entry and swing heating in the furnace of the roller hearth quenching furnace of the present application;

[0040] Figure 7 It is a flowchart of the partition discharging of the roller hearth quenching furnace of the present application.

[0041] Reference signs:

[0042] 101 - loading roller table; 102 - roller hearth furnace; 103 - quenching section; 104 - discharging roller table; 201 - first laser sensor; 202 - first driving motor; 203 - second laser sensor; 204 - second driving motor; 301 - aluminum alloy plate. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present application will be described in detail below with reference to the drawings, which form a part of this description. The drawings, together with the description, serve to explain the principles of the present application, and should not be used to limit the scope of the present application.

[0044] Embodiment 1

[0045] A specific embodiment of the present application, as shown in the accompanying drawings, discloses a partitioned loading and discharging method for roller hearth quenching furnace, comprising: Figure 4

[0046] Step S1: virtual partitioning according to the physical partition size of the roller hearth furnace 102 and the type of plate to be produced; and sequentially preparing plate materials according to the order of virtual partitioning;

[0047] Step S2: loading the prepared plate materials of the current roller hearth furnace 102 onto the loading roller table 101, comparing the actual preparation length with the preparation length of each virtual partition, calibrating the real length of each virtual partition, and sequentially determining the real partition length corresponding to each plate material;

[0048] Step S3: after the plate material loading is completed, the driving motors of the roller hearth furnace 102 and the loading roller table 103 are simultaneously operated to drive the aluminum alloy plate 301 into the furnace; after the plate material is heated in the roller hearth quenching furnace, the plate materials of multiple partitions are sequentially discharged from the furnace according to the required heating time of each partition.

[0049] In the step S1: virtual partitioning is performed according to the physical partition size of the roller hearth furnace; and the plate materials of the current roller hearth furnace are prepared onto the loading roller table, the actual preparation length is compared with the preparation length of each virtual partition, the real length of each virtual partition is calibrated, and the real partition length corresponding to each plate material is sequentially determined; the virtual partitioning simultaneously acts on the loading roller table and the roller hearth furnace, i.e., the loading roller table and the roller hearth furnace are simultaneously divided into virtual partitions according to the same rules.

[0050] In the step S2: after the plate material loading is completed, the driving motors of the roller hearth furnace and the loading roller table are simultaneously operated to drive the aluminum alloy plate into the furnace; the aluminum alloy plates of each virtual partition are swing-heated in the roller hearth furnace, the heating temperature and temperature control strategy of each virtual partition in the roller hearth furnace are consistent, the furnace rollers of each virtual partition independently swing and do not interfere with each other, avoiding collision of plate materials of different virtual partitions in the furnace or scratching of the surface of the plate materials.

[0051] ​In the step S3, since the thickness of each virtual partition is different, the heating time is different, and the thinner plate is discharged first; after the plate in each virtual partition meets the heating time, it is discharged in turn; when a virtual partition is discharged, the other virtual partitions which do not meet the heating time continue to swing and heat.

[0052] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 , the roller bottom quenching furnace comprises a charging roller 101, a roller bottom furnace 102, a quenching section 103 and a discharging roller 104. Specifically, the first laser sensor 201 is installed at the partition interface of the charging roller 101, and the charging roller is driven to operate by the first driving motor 202. The second laser sensor 203 is installed at the partition interface position of the roller bottom furnace 102, and the roller bottom furnace 102 is driven by the second driving motor 204. In the implementation, the aluminum alloy plate 301 is conveyed into the roller bottom furnace 102 through the charging roller 101, quenched by the quenching section 103, and then guided out by the discharging roller 104.

[0053] Specifically, as shown in Figure 2 , the charging roller 101 is physically partitioned, and the physical partition of the charging roller 101 is consistent with the physical partition of the roller bottom furnace 102. The first laser sensor 201 and the second laser sensor 203 are arranged at each partition interface of the charging roller 101. The first laser sensor 201 can detect whether there is aluminum alloy plate 301 in the width direction of the charging roller 101. When the aluminum alloy plate 301 blocks the detection area of the first laser sensor 201, the first laser sensor 201 sends a signal indicating that there is material. Each physical partition of the charging roller 101 is driven by a first driving motor 202. When the first driving motor 202 drives the rotating of the conveying roller on the charging roller 101, the charging roller 101 can realize plate conveying.

[0054] Specifically, as shown in Figure 3 , the second laser sensor 203 is arranged at the physical partition interface of the roller bottom furnace 102. The second laser sensor 203 can detect whether there is aluminum alloy plate 301 in the width direction of the roller bottom furnace 102. When the plate blocks the detection area of the second laser sensor 203, the second laser sensor 203 sends a signal indicating that there is material. Each physical partition of the roller bottom furnace 102 is independently driven by a second driving motor 204.

[0055] In the embodiment, the length of each physical partition of the roller bottom furnace 102 is Q1, Q2, Q3, … Qn, and the total length is ΣQ; the swing length of the aluminum alloy plate 301 in the furnace is L n . bLength of the aluminum alloy plate 301 to be produced (referring to the length of the plate loading, which is composed of the sum of the lengths of multiple plates and the clearance between the plates) is L1, L2, L3, … L respectively n Length of the virtual partition is F1, F2, F3, … F n When the virtual partition is performed, the thinnest plate is divided into the first partition, that is, the partition with the highest priority to be discharged, and the second partition, the third partition, … are sequentially divided according to the thickness of the aluminum alloy plate. When the first partition is virtually partitioned, F1 = Q1 + Q2 + … + Q k , and F1 > L1 + L b ; similarly, F2, F3, … F n are divided respectively. The virtual partition simultaneously acts on the roller hearth furnace 102 and the loading roller bed 101, so that the virtual partitions of the two are consistent. At this time, the drive motors in each virtual partition are divided into groups and run synchronously, and the drive motors in different virtual partitions are not synchronized and have no interlocking relationship. The laser sensor signals between different physical partitions in each virtual partition no longer serve as partition division, and only the laser sensors at the interfaces of each virtual partition are used for partition division.

[0056] Further, in the step S1, the way of dividing the virtual partition of the plate is as follows:

[0057] Step S11: The current plate to be produced is sorted according to thickness from high to low.

[0058] Step S12: For plates with a thickness difference ≤ 5%, they are considered to be of the same thickness and are defined as nominal thickness. The value of the nominal thickness is taken from the maximum thickness of the plate with the same nominal thickness.

[0059] Step S13: For plates of the same nominal thickness, they can be divided into the same virtual partition, and multiple virtual partitions are arranged in turn according to the plate heating time “from short to long”, and the corresponding plate materials are prepared to the loading roller bed 101.

[0060] Further, as shown in Figure 5 , in the step S13, the plate preparation process of each virtual partition includes:

[0061] Step S131: Calculate the number N w1 of the plate in the first virtual partition arranged in the width direction of the roller hearth furnace 102; meet the total width W p1 of the multiple plates in the first virtual partition and the total spacing W d1 in the width direction of the multiple plates is less than the width W of the roller hearth furnace 102; wherein W p1 = N w1 × single plate width, W d1 = (N w1 +1)× width direction plate spacing;

[0062] Step S132: Calculate the number N of the arrangement of the plate in the length direction of the roller hearth furnace 102 in the first virtual partition L1 ; the total length L of the multiple plates in the first virtual partition P1 and the total swing distance L in the length direction of the multiple plates d1 is less than the length ΣQ of the roller hearth furnace 102; wherein, L p1 = N L1 × the length of a single plate, L d1 = (N L1 +1)× the swing distance L in the length direction of the plate b ;

[0063] Step S133: Hoist the aluminum alloy plate to the first virtual partition of the loading roller 101, and operate the drive motor of the loading roller to drive the plate to walk to the tail of the loading roller 101 until the laser sensor at the last partition interface position senses the material, which is recorded as the initial position of the plate material.

[0064] Step S134: The drive motor of the loading roller 101 drives the plate to walk to the head of the loading roller 101 until the laser sensor at the first partition interface position senses the material, and the walking distance S1 of the plate from the initial position to the sensing position is calculated.

[0065] Step S135: Calculate the actual material length L1' of the first partition = the total length ΣQ of the roller hearth furnace - S1; compare the actual material length of the first partition with the length of the first virtual partition; if L1'+L b ≤ F1 = Q1+Q2+Q3…+Q k , then the first virtual partition is successfully prepared; if L1'+L b > F1, then the first virtual partition continues to add the next physical partition and re-divide the first virtual partition of the roller hearth furnace 102 and the loading roller 101 until L1'+L b ≤ F1' = F1+Q k+1 , at which time the first virtual partition is successfully divided.

[0066] Step S136: Calculate the remaining loading length L s in the roller hearth furnace 102; compare whether the remaining loading length L s is greater than the length of the plate to be produced in the next virtual partition; if so, repeat steps S131-S135 to continue dividing and preparing the next virtual partition until all virtual partitions are successfully divided and prepared.

[0067] Further, in the step S136, when preparing the remaining virtual partition, the aluminum alloy plate 301 is hoisted to the empty interval of the remaining loading roller way 101 which has not been virtually partitioned, and the aluminum alloy plate is kept from contacting the conveying roller in the area where the preparation is completed.

[0068] Further, in the step S13, the length of each physical partition of the loading roller way 101 and the roller hearth 102 is Q1, Q2, Q3…Q k+1 , Q k+2 , Q k+3 …Q n , and the total length of the roller hearth is ΣQ; the length of each virtual partition is F1, F2, F3…F n , and the length of the virtual partition is the sum of a plurality of continuous physical partitions.

[0069] In the embodiment, the plate is classified according to the material and combined with the nominal thickness to realize efficient classification management of different specifications of plates and ensure that the plates with the same process parameters are processed in batches; on this basis, the heating time in the furnace and the plate discharge time can be dynamically adjusted according to the heating time requirement of each virtual partition, so as to ensure that the partitions with short time are discharged first and improve the overall heat treatment efficiency. At the same time, the laser sensor control is used in cooperation with the driving motor to realize deep coupling of the driving control logic of the plate partition and the loading roller way 101 and the roller hearth 102, and the virtual partition of the plate is matched through the design of synchronous operation of the same partition and independent control of different partitions of the loading roller way 101 and the roller hearth 102, thereby providing a basic support for intelligent continuous production.

[0070] The partition loading and discharging method of the present application virtually "binds" several physical partitions into a virtual partition, the furnace roller drive in a single virtual partition is synchronous, the furnace roller drive in different virtual partitions is different and does not interfere with each other, and the virtual partition is the basis for realizing partition action and partition discharge.

[0071] Specifically:

[0072] On the loading roller way, the virtual partition can realize partition loading and partition length measurement. For example, the first virtual partition (occupying three physical partitions) has been prepared (the aluminum plate is hoisted to the loading roller way and the length measurement is completed, and the aluminum plate head contacts the boundary laser sensor), when the second virtual partition is prepared, the length measurement is performed, and the driving motor of the three physical partitions occupied by the first virtual partition is not actuated, and only the remaining driving motor is actuated.

[0073] In a roller hearth furnace, the purpose of virtual partitioning is to ensure that the aluminum plates only oscillate within the physical partition occupied by their respective virtual partitions during the heating process. Otherwise, the aluminum plates in one virtual partition may run onto the roller conveyor of other virtual partitions, which could lead to serious accidents, ranging from scrapping the aluminum plates to damaging the equipment.

[0074] During the discharge process, virtual zones that have met the heating time can be discharged individually, while aluminum plates in other virtual zones continue to oscillate and heat without interfering with each other.

[0075] In step S2, the loading roller conveyor 101, in conjunction with the drive motor, sequentially feeds the plates into the roller hearth furnace 102, thereby achieving orderly distribution of the plates in the furnace according to virtual partitions. During the loading process, the second laser sensor 203 detects the position and spacing of the plates in real time, and the second drive motor 204 dynamically adjusts the position of the plates according to the feedback signal to ensure accurate positioning of the plates in each partition of the roller hearth furnace 102.

[0076] Furthermore, in step S3, laser sensors are set at each partition interface of the loading roller conveyor 101. The laser sensors can detect whether aluminum alloy plates are placed in the width direction of the loading roller conveyor 101. When a plate blocks the detection area of ​​the first laser sensor 201, the sensor sends a material signal.

[0077] Furthermore, the virtual partitioning applies to both the roller hearth furnace 102 and the charging roller conveyor 101, ensuring that the virtual partitioning of the two remains consistent. The drive motors within each virtual partition are grouped and kept running synchronously, while the drive motors between different virtual partitions are not synchronized.

[0078] Further, in step S3, the length dimensions of each physical partition of the roller hearth furnace 102 are Q1, Q2, Q3…Q… k+1 Q k+2 Q k+3 …Q n The total length of the roller hearth furnace 102 is ΣQ; the lengths of each virtual partition are F1, F2, F3...F n The length of a virtual partition is the sum of the lengths of multiple consecutive physical partitions.

[0079] Specifically, in this embodiment, a physical partition of the roller hearth furnace is a roller hearth furnace section; multiple furnace sections are interconnected to form the roller hearth furnace cavity of the present invention; the second laser sensor 203 is located at the boundary line between two adjacent physical partitions.

[0080] Furthermore, such as Figure 6 As shown, in step S2, the method for feeding the sheet metal into the furnace is as follows:

[0081] Step S21: After the furnace door is opened to the position, the driving motors of all virtual partitions of the charging roller and roller hearth are operated at the same charging speed to drive the plates into the furnace sequentially.

[0082] Step S22: When the material signal of the laser sensor arranged at the furnace head of the roller hearth disappears, it can be judged that all the plates have entered the furnace at this time, the charging is completed, the driving motors of all virtual partitions of the charging roller 101 and the roller hearth 102 are stopped, the furnace door is closed, and the roller hearth 102 starts heating.

[0083] Further, in the step S2, the swing method of each virtual partition in the roller hearth is as follows:

[0084] Step S23: After the charging of each virtual partition is completed, the driving motors of each virtual partition of the roller hearth 102 are operated in the opposite direction of the charging direction at the swing speed;

[0085] Step S24: When the laser sensor in the running direction of the plate in each virtual partition detects a material signal or the actual swing distance L b is greater than the set swing length L b , all the driving motors of the virtual partition are immediately operated in the opposite direction of the original running direction at the swing speed, and the speed is still the swing speed; the reciprocating swing heating of the plate in the roller hearth 102 is realized.

[0086] Further, as shown in the step S3, the plate discharging method is as follows: Figure 7

[0087] Step S31: When a virtual partition reaches the heating time, the discharging operation can be performed, after receiving the discharging signal, all the driving motors from the first virtual partition to the virtual partition to be discharged of the roller hearth 102 are simultaneously operated at the discharging speed until the laser sensor arranged at the furnace tail receives the material signal, and all the driving motors from the first virtual partition to the virtual partition to be discharged of the roller hearth are stopped.

[0088] Step S32: After the discharging furnace door of the roller hearth 102 is opened to the position, the quenching section 103 driving motor, the discharging roller driving motor, and all the driving motors from the first virtual partition to the virtual partition to be discharged of the roller hearth are simultaneously operated at the discharging speed, after the material signal of the second laser sensor 203 arranged at the furnace tail disappears, the furnace door is closed after a certain time delay. When the laser sensor arranged at the tail of the discharging roller receives the material signal, the quenching section 103 driving motor, the discharging roller driving motor, and all the driving motors from the first virtual partition to the virtual partition to be discharged of the roller hearth 102 are stopped at the discharging speed, at this time, the discharging of the current virtual partition is completed.

[0089] ​Step S33: After the current virtual partition is discharged, all virtual partition roller beds in the roller hearth furnace 102 swing in their respective virtual partitions at a swing speed.

[0090] Further, in step S3, the virtual partitions that have not yet reached the heating time continue to swing in their respective virtual partitions at a swing speed, and do not interfere with the virtual partitions that are performing the discharging operation.

[0091] In this embodiment, the real distribution area of the aluminum alloy plate in the roller hearth furnace 102 is determined by dynamic matching of the virtual partition and the physical partition, realizing accurate positioning and efficient arrangement of the aluminum alloy plate on the charging roller bed 101. Through real-time feedback of the position of the plate material by the laser sensor, combined with accurate control of the driving motor, it is ensured that the length of each partition meets the process requirements. When a virtual partition is extended due to actual material deviation, the system automatically expands the partition range and recalculates until the L n ’+L b <F n criterion. This method not only improves the charging efficiency, but also enhances the adaptability of the system to different plate specifications, providing a reliable guarantee for subsequent uniform heating and continuous conveying in the furnace.

[0092] Compared with the prior art, the technical scheme provided by the embodiment at least has one of the following beneficial effects:

[0093] 1. The roller hearth quenching furnace partition charging and discharging method of the embodiment maximizes the utilization rate of the furnace, i.e. produces a certain number of multi-specification products in the shortest time, achieving the highest utilization efficiency of the furnace.

[0094] 2. The roller hearth quenching furnace partition charging and discharging method of the invention improves the utilization rate of the charging space through the logic of "classifying plates by thickness", "determining the number of partition blocks according to plate length and width", and "sequential filling of multiple virtual partitions": maximizes the utilization of the length and width space of the furnace, reduces invalid gaps, and reduces space waste.

[0095] 3. The roller hearth quenching furnace partition charging and discharging method of the invention ensures the safety and rationality of charging. During the partition process, parameters such as "swing distance" and "plate spacing" are always included to avoid plate collision during roller swing, while sufficient spacing is reserved to ensure the safety of the charging and heating process.

[0096] 4. The roller hearth quenching furnace partition charging and discharging method of the invention adapts to the demand for multi-specification plates and supports mixed charging of plates of different lengths, widths and thicknesses, without being limited to a single specification. It can flexibly match the plate resources in the material warehouse and improve the utilization rate of materials.

[0097] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A method for loading and unloading materials in a roller hearth quenching furnace, characterized in that, include: Step S1: Create virtual partitions based on the physical partition dimensions of the roller hearth furnace and the type of sheet material to be produced; prepare the sheet material in the order of the virtual partitions. The prepared sheet material is fed onto the feeding roller conveyor. The actual prepared length is compared with the prepared length of each virtual partition. The true length of each virtual partition is obtained by calibration. The true partition length corresponding to each type of sheet material is determined in turn. Step S2: After the sheet material is fed, the drive motors of the roller hearth furnace and the charging roller conveyor start simultaneously, driving the aluminum alloy sheet into the furnace for heating; Step S3: After the plates are placed into the furnace and heated in the roller hearth quenching furnace, the plates from multiple zones are taken out of the furnace in sequence according to the heating time required for each zone.

2. The method for loading and unloading materials in a roller hearth quenching furnace according to claim 1, characterized in that, In step S1, the virtual partitioning and material preparation methods are as follows: Step S11: Sort the current boards to be produced from highest to lowest thickness; Step S12: For plates with a thickness difference ≤ 5%, they are considered to be of the same thickness and defined as nominal thickness; the value of nominal thickness is taken from the maximum thickness among plates with the same nominal thickness. Step S13: For plates with the same nominal thickness, they can be designated as the same virtual zone. At the same time, multiple virtual zones are arranged in order of heating time from shortest to longest, and the corresponding plates are prepared to the loading roller conveyor.

3. The method for loading and unloading materials in a roller hearth quenching furnace according to claim 2, characterized in that, In step S3: Since the thickness of the boards in each virtual partition is different, their heating time is different. The thinner boards have a shorter heating time and are taken out of the furnace first. After the boards in each virtual partition meet the heating time, they are taken out of the furnace in sequence. When a virtual partition is taken out of the furnace, the other virtual partitions that have not reached the heating time continue to swing and heat.

4. The method for loading and unloading materials in a roller hearth quenching furnace according to claim 3, characterized in that, In step S2, the method for feeding the sheet metal into the furnace is as follows: Step S21: After the furnace door is opened to the correct position, the drive motors of all virtual zones of the loading roller conveyor and the roller hearth furnace operate at the same furnace entry speed, driving the plates into the furnace sequentially; Step S22: When the laser sensor at the hearth furnace head loses its material signal, it is determined that all plates have entered the furnace and the loading is complete; the drive motors of the loading rollers and all virtual zones of the hearth furnace stop, the furnace door is closed, and the hearth furnace begins heating.

5. The method for loading and unloading materials in a roller hearth quenching furnace according to claim 4, characterized in that, In step S2, the method for each virtual partition to swing in the roller hearth furnace is as follows: Step S23: After the plates of each virtual zone are put into the furnace, the drive motors of each virtual zone of the roller hearth furnace run at an oscillating speed in the opposite direction of the furnace feeding direction. Step S24: When the laser sensor in the running direction of the board in each virtual partition detects a material signal or the actual swing distance L b > Set swing length L b At that time, all drive motors in this virtual partition immediately change direction and run in the opposite direction of their original running direction, while the speed remains the oscillating speed.

6. The method for loading and unloading materials in a roller hearth quenching furnace according to any one of claims 1-5, characterized in that, In step S3, the virtual partitions that have not yet reached the heating time continue to oscillate within their respective virtual partitions at the oscillation speed, without interfering with the virtual partitions that are performing the discharge operation.

7. The method for loading and unloading materials in a roller hearth quenching furnace according to claim 6, characterized in that, In steps S1 to S3, laser sensors are installed on the interface of each zone of the charging roller conveyor and the roller hearth furnace. The laser sensors can detect whether aluminum alloy plates are placed in the width direction of the charging roller conveyor or in each section of the roller hearth furnace. When a plate blocks the detection area of ​​the laser sensor, the sensor sends a material signal.

8. The method for loading and unloading materials in a roller hearth quenching furnace according to claim 7, characterized in that, In step S1, the virtual partitioning acts on both the roller hearth furnace and the charging roller conveyor, ensuring that the virtual partitioning of the two is consistent; the drive motors in each virtual partition are grouped and kept running synchronously, while the drive motors in different virtual partitions are not synchronized.

9. The method for loading and unloading materials in a roller hearth quenching furnace according to claim 8, characterized in that, In step S1, the length dimensions of each physical partition of the roller hearth furnace are Q1, Q2, Q3…Q… k+1 Q k+2 Q k+3 …Q n The total length of the roller hearth furnace is ΣQ.

10. The method for loading and unloading materials in a roller hearth quenching furnace according to claim 9, characterized in that, The lengths of each virtual partition are F1, F2, F3...F n The length of a virtual partition is the sum of the lengths of multiple consecutive physical partitions.

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