CN107413891A - A kind of clapboard straightening process based on cooperation roller system - Google Patents
A kind of clapboard straightening process based on cooperation roller system Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
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Abstract
本发明公开一种基于配合辊系的楔形板矫直工艺，采用双辊系矫直机，大、小辊径辊系分别排列在入口侧和出口侧，具体步骤为：一、根据楔形板参数计算出不同板厚对应的压下量；二、根据楔形板坡度调整矫直机大、小辊径矫直辊系的下辊倾斜角度和上辊倾斜角度；三、根据楔形板参数对楔形板进行板厚分区，将楔形板依次划分为薄板区、过渡区和厚板区三个板段；四、根据楔形板板厚分区，采用不同辊系对不同板段进行矫直，矫直时，楔形板薄板区先进入矫直机，大、小辊径矫直辊系分工配合完成楔形板不同板段的矫直。本发明解决了楔形板矫直时辊数辊径应根据板厚改变而变化的问题，使压下量与辊数辊径符合楔形板矫直工艺要求，能够矫直出质量合格的楔形板。
The invention discloses a wedge-shaped plate straightening process based on a matching roller system. A double-roll system straightening machine is adopted, and the roller systems with large and small roll diameters are respectively arranged on the entrance side and the exit side. The specific steps are: 1. According to the parameters of the wedge-shaped plate Calculate the reduction corresponding to different plate thicknesses; 2. Adjust the inclination angle of the lower roll and the upper roll of the straightening roll system with large and small roll diameters of the straightening machine according to the slope of the wedge plate; 3. Adjust the inclination angle of the wedge plate according to the parameters of the wedge plate Carry out plate thickness division, and divide the wedge-shaped plate into three plate sections: thin plate area, transition area and thick plate area in turn; 4. According to the plate thickness division of the wedge-shaped plate, different roll systems are used to straighten different plate sections. When straightening, The thin plate area of the wedge-shaped plate enters the straightening machine first, and the straightening rollers with large and small diameter rolls work together to complete the straightening of different sections of the wedge-shaped plate. The invention solves the problem that the number of rolls and the diameter of the rolls should change according to the thickness of the plate when straightening the wedge-shaped plate, so that the reduction and the number of rolls and the diameter of the rolls meet the technical requirements for straightening the wedge-shaped plate, and the qualified wedge-shaped plate can be straightened.
Description
技术领域technical field
本发明涉及板材矫直领域，具体涉及一种基于配合辊系的楔形板矫直工艺。The invention relates to the field of plate straightening, in particular to a wedge-shaped plate straightening process based on a matching roller system.
背景技术Background technique
楔形板是一种纵向变截面板，可优化桥梁、船体、建筑等结构断面的设计，减少钢材用量、减少焊接次数、减轻桥梁等建筑重量，在造船和桥梁工业有着十分广阔的应用前景，其需求在世界范围内持续增长，但其矫直问题仍是个技术难题。世界上著名的冶金设备制造厂家已经纷纷推出了“第三代矫直机”，但矫直的对象仍是板厚不变的板材，不能对楔形板这种变厚度板进行矫直。首先，楔形板两边存在板厚差，当板厚差值到一定时，需要在线更换辊系，使辊系参数满足楔形板板厚变化；其次，对于楔形板，其厚度在矫直时是变量，需要在线调节矫直辊的压下量，用现有的矫直机进行矫直显然不合理。由于楔形板矫直过程是一个动态变化过程，需要研究楔形板矫直理论技术，改进现有的矫直设备或者研制具备动态调整功能的新型矫直机，以满足产品平直度方面的要求。Wedge plate is a longitudinally variable cross-section plate, which can optimize the design of structural sections of bridges, hulls, buildings, etc., reduce steel consumption, reduce welding times, and reduce the weight of bridges and other buildings. It has very broad application prospects in shipbuilding and bridge industries. Demand continues to grow worldwide, but its straightening remains a technical problem. Famous metallurgical equipment manufacturers in the world have launched "third-generation straightening machines", but the straightening objects are still plates with constant thickness, and it is not possible to straighten plates with variable thickness such as wedge plates. First of all, there is a thickness difference between the two sides of the wedge plate. When the plate thickness difference reaches a certain value, the roll system needs to be replaced online so that the parameters of the roll system meet the thickness change of the wedge plate; secondly, for the wedge plate, its thickness is variable during straightening , it is necessary to adjust the reduction of the straightening roller on-line, and it is obviously unreasonable to use the existing straightening machine for straightening. Since the wedge plate straightening process is a dynamic process, it is necessary to study the theory and technology of wedge plate straightening, improve the existing straightening equipment or develop a new straightening machine with dynamic adjustment function to meet the requirements of product flatness.
发明内容Contents of the invention
本发明旨在提供一种基于配合辊系的楔形板矫直工艺，能够在满足矫直质量的前提下矫直楔形板。The invention aims to provide a wedge-shaped plate straightening process based on a matching roller system, which can straighten the wedge-shaped plate under the premise of satisfying the straightening quality.
本发明目的通过下述技术方案实现：一种基于配合辊系的楔形板矫直工艺，采用双辊系矫直机，双辊系包括大辊径矫直辊系和小辊径矫直辊系，大辊径矫直辊系排列在入口侧，小辊径矫直辊系排列在出口侧，大、小辊径矫直辊系的矫直辊在矫直过程中可根据楔形板板厚的变化进行在线压下调节，其中小辊径矫直辊系的上辊可升降从而实现小辊径矫直辊系投入/退出工作，实现楔形板矫直时所需的压下量，具体步骤如下：The purpose of the present invention is achieved through the following technical solutions: a wedge-shaped plate straightening process based on a matching roll system, using a double-roller straightening machine, and the double-roller system includes a large-diameter straightening roller system and a small-diameter straightening roller system The straightening rolls with large diameter rolls are arranged on the entrance side, and the straightening rolls with small diameters are arranged on the exit side. The straightening rolls of the large and small roll diameter straightening rolls can be adjusted according to the thickness of the wedge plate Change online reduction adjustment, in which the upper roll of the small-diameter straightening roller system can be raised and lowered to realize the input/exit work of the small-diameter straightening roller system, and realize the reduction required for wedge-shaped plate straightening. The specific steps are as follows :
(1)根据楔形板参数计算出不同板厚对应的压下量；(1) Calculate the reduction corresponding to different plate thicknesses according to the wedge plate parameters;
(2)根据楔形板坡度调整矫直机大、小辊径矫直辊系的下辊倾斜角度和上辊倾斜角度；(2) Adjust the inclination angle of the lower roll and the upper roll of the straightening roll system with large and small roll diameters of the straightening machine according to the slope of the wedge plate;
(3)根据楔形板参数对楔形板进行板厚分区，将楔形板依次划分为薄板区、过渡区和厚板区三个板段；(3) According to the wedge plate parameters, the thickness of the wedge plate is divided into three plate sections: thin plate area, transition area and thick plate area;
(4)根据楔形板板厚分区，采用不同辊系对不同板段进行矫直，矫直时，楔形板薄板区先进入矫直机，大、小辊径矫直辊系分工配合完成楔形板不同板段的矫直。(4) According to the thickness division of the wedge plate, different roll systems are used to straighten different plate sections. When straightening, the thin plate area of the wedge plate enters the straightening machine first, and the large and small roll diameter straightening roller systems work together to complete the wedge plate. Straightening of different board sections.
本发明的楔形板矫直工艺采用大小辊径两种矫直辊系，大辊径矫直辊系排列在入口侧，小辊径矫直辊系排列在出口侧，矫直前矫直辊系根据楔形板坡度调整倾斜角度，矫直时楔形板先从大辊径矫直辊系进入，入口侧使用大辊径可以承受更大压力，同时也满足等强度设计的理想状态；矫直薄板区时，楔形板先经过大辊径辊系预矫直，再经过小辊径辊系再次矫直；矫直过渡区时，小辊径矫直辊系上辊由入口端到出口端逐个离开工作，直至小辊径矫直辊系上辊全部离开工作；矫直厚板区时，小辊径矫直辊系不工作，只留大辊径矫直辊系工作直至矫直结束。The wedge-shaped plate straightening process of the present invention adopts two types of straightening roll systems with large and small roll diameters. The straightening rolls with large roll diameters are arranged on the entrance side, and the straightening rolls with small roll diameters are arranged on the exit side. Before straightening, the straightening rolls are arranged according to Adjust the inclination angle of the wedge-shaped plate slope. When straightening, the wedge-shaped plate first enters the straightening roll system with a large roll diameter. The large roll diameter at the entrance side can withstand greater pressure, and it also meets the ideal state of equal strength design; when straightening the thin plate area , the wedge-shaped plate is pre-straightened by the large-diameter roller system first, and then straightened again by the small-diameter roller system; in the straightening transition zone, the upper rollers of the small-diameter straightening roller system leave the work one by one from the inlet end to the outlet end, Until the upper rolls of the small roll diameter straightening roll system leave work; when straightening the thick plate area, the small roll diameter straightening roll system does not work, and only the large roll diameter straightening roll system works until the straightening is completed.
本发明的有益效果是：The beneficial effects of the present invention are:
1、与现有矫直机相比，本发明的楔形板矫直机辊系是一种配合工作的双矫直辊系结构，在矫直过程中矫直辊可以在线压下调整，使压下量满足楔形板矫直工艺要求。1. Compared with the existing straightening machine, the wedge-shaped plate straightening machine roll system of the present invention is a double straightening roll system structure that works together. During the straightening process, the straightening rolls can be adjusted online, so that The lower amount meets the technical requirements of wedge plate straightening.
2、本发明的楔形板矫直工艺，可以根据板厚的变化通过在线匹配矫直辊系以实现薄板多辊小辊径矫直，厚板大辊径矫直，矫直出质量合格的楔形板。2. The wedge-shaped plate straightening process of the present invention can achieve straightening of thin plates with multiple rolls with small roll diameters and thick plates with large roll diameters by matching the straightening roll system online according to the change of plate thickness, and straightening wedges with qualified quality plate.
3、本发明的楔形板矫直工艺，在矫直楔形板薄板区时，板材先进入大辊径辊系进行预矫直，在大辊径矫直辊处进行大的压下量，小辊径矫直辊处进行小的压下量，可以使大辊径矫直辊承受大的矫直力，小辊径矫直辊承受小的矫直力，同时还追求等强度设计的理想状态。3. In the straightening process of the wedge-shaped plate of the present invention, when straightening the thin plate area of the wedge-shaped plate, the plate first enters the large-diameter roller system for pre-straightening, and a large reduction is performed at the large-diameter straightening roller, and the small roller A small amount of reduction at the straightening roller with a large diameter can make the straightening roller with a large diameter bear a large straightening force, and the straightening roller with a small diameter can withstand a small straightening force. At the same time, it also pursues the ideal state of equal strength design.
4、本发明不仅能应用于楔形板矫直，也可用于常规中厚板的矫直，通用性强，矫直的板材规格范围比现有的矫直机更广。4. The present invention can not only be applied to the straightening of wedge-shaped plates, but also can be used for straightening of conventional medium-thick plates. It has strong versatility, and the specification range of straightened plates is wider than that of existing straightening machines.
附图说明Description of drawings
图1为用于本发明的矫直辊系示意图。Figure 1 is a schematic diagram of a straightening roll system used in the present invention.
图2为本发明的工艺流程图。Fig. 2 is a process flow diagram of the present invention.
图3为一块楔形板分区示意图。Fig. 3 is a schematic diagram of partitions of a wedge plate.
图4为矫直辊系整体倾斜调整示意图。Figure 4 is a schematic diagram of the overall inclination adjustment of the straightening roller system.
图5为矫直楔形板薄板区示意图。Fig. 5 is a schematic diagram of straightening the thin plate area of the wedge plate.
图6为矫直楔形板过渡区示意图。Fig. 6 is a schematic diagram of the transition zone of the straightening wedge plate.
图7为矫直楔形板厚板区示意图。Fig. 7 is a schematic diagram of straightening the thick plate area of wedge-shaped plate.
图中：1-大辊径矫直辊系，2-小辊径矫直辊系；3-楔形板；3a-薄板区；3b-过渡区；3c-厚板区。In the figure: 1-large roll diameter straightening roll system, 2-small roll diameter straightening roll system; 3-wedge plate; 3a-thin plate area; 3b-transition area; 3c-thick plate area.
具体实施方式detailed description
下面结合附图及实施例对本发明做进一步说明：Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
如图1所示，本发明实施例的一种基于配合辊系的楔形板矫直工艺，其矫直辊辊系采用大辊径与小辊径两种辊系，大辊径矫直辊系1排列在入口侧，小辊径矫直辊系2排列在出口侧。大、小辊径矫直辊系的矫直辊在矫直过程中可根据楔形板板厚的变化进行在线压下调节，其中小辊径矫直辊系2的上辊可升降从而实现小辊径矫直辊系2投入/退出工作，实现楔形板矫直时所需的压下量。As shown in Figure 1, a wedge-shaped plate straightening process based on a matching roll system according to an embodiment of the present invention, the straightening roll system adopts two types of roll systems, a large roll diameter and a small roll diameter, and the large roll diameter straightening roll system 1 is arranged on the entrance side, and the small diameter straightening roller system 2 is arranged on the exit side. The straightening rolls of the straightening roll system with large and small roll diameters can be adjusted online according to the change of wedge plate thickness during the straightening process, and the upper roll of the straightening roll set 2 with small roll diameter can be lifted up and down to realize the reduction of small rolls. Diameter straightening roller system 2 puts in/out of work to realize the reduction required for wedge plate straightening.
给定板材参数和矫直机辊系参数如表1、表2所示。The parameters of the given plate and the parameters of the roll system of the straightening machine are shown in Table 1 and Table 2.
表1Table 1
表2Table 2
如图2所示，本发明是一种基于配合辊系的楔形板矫直工艺，具体矫直时可按如下步骤进行：As shown in Fig. 2, the present invention is a kind of wedge-shaped plate straightening technology based on coordinating roller system, can carry out as follows during concrete straightening:
(1)根据楔形板参数对楔形板进行分区。(1) Partition the wedge plate according to the wedge plate parameters.
如图3所示，将楔形板3分为三个板段：薄板区3a(2500mm)、过渡区3b(500mm)和厚板区3c(2000mm)。As shown in Figure 3, the wedge-shaped plate 3 is divided into three plate sections: thin plate area 3a (2500mm), transition area 3b (500mm) and thick plate area 3c (2000mm).
(2)根据楔形板参数计算出不同板厚对应的压下量。(2) Calculate the reduction corresponding to different plate thicknesses according to the wedge plate parameters.
采用线性递减矫直方案矫直该楔形板，当板厚为h时，大辊径矫直辊系上辊首辊压下量为上辊末辊压下量为小辊径辊系各上辊压下量均取为其中Cy为相对弹复曲率，Cr为相对残余曲率，σt为板材屈服强度，E为板材弹性模量，l1为大辊径辊系辊距，l2为小辊径辊系辊距。设最小板厚处于下辊首辊接触时刻为t＝0时刻，矫直速度为v＝200mm/s，计算可得各辊随时间压下量(因小辊径矫直辊压下量计算方法与大辊径的相同，本实施例中只给出大辊径矫直辊的压下量)。The wedge-shaped plate is straightened by a linear decreasing straightening scheme. When the thickness of the plate is h, the reduction of the head roll of the upper roll of the large-diameter straightening roll system is The final roll reduction of the upper roll is The reduction of each upper roll of the small roll diameter roll system is taken as Among them, C y is the relative elastic complex curvature, C r is the relative residual curvature, σ t is the yield strength of the sheet, E is the elastic modulus of the sheet, l 1 is the roll pitch of the large roll diameter, l 2 is the small roll diameter roll distance. Assuming that the minimum plate thickness is at the contact time of the lower roll and the first roll as t=0, and the straightening speed is v=200mm/s, the reduction of each roll over time can be calculated (the calculation method for the reduction of the straightening roll due to the small roll diameter Same as that of the large roll diameter, only the reduction of the large roll diameter straightening roll is given in this embodiment).
考虑矫直时板厚的增加，各辊应有一个随着板厚增加的向上位移，可得各辊压下位移函数为：Considering the increase of plate thickness during straightening, each roller should have an upward displacement with the increase of plate thickness, and the displacement function of each roller can be obtained as:
上辊首辊 Upper Roller First Roller
上辊二辊 Upper roller two rollers
上辊三辊 Upper roller three rollers
上辊末辊 Upper roller Final roller
(3)根据楔形板坡度调整下辊倾斜角度，同时对上辊倾斜角度进行调整，使其倾斜角度均为如图4所示。(3) Adjust the inclination angle of the lower roll according to the slope of the wedge plate, and at the same time adjust the inclination angle of the upper roll so that the inclination angle is As shown in Figure 4.
(4)根据楔形板板厚分区，采用大、小辊系对不同板段进行矫直，矫直时，为便于咬入，楔形板薄板区段先进入矫直机，如图5所示，当矫直薄板区前2500mm段时，大、小辊径矫直辊系同时工作，大辊径矫直辊系起预矫直作用；如图6a、6b所示，当矫直过渡区中间500mm段时，小辊径矫直辊系上辊由入口端到出口端逐个提升离开工作，直至小辊径矫直辊系上辊都不参与矫直，以保证此过程的稳定性及楔形板过渡区的矫直质量；如图7所示，当矫直厚板区后2000mm段时，小辊径矫直辊系不工作，只留大辊径矫直辊系矫直辊工作，直至矫直结束。(4) According to the thickness division of the wedge-shaped plate, use large and small roller systems to straighten different plate sections. When straightening, in order to facilitate biting, the thin plate section of the wedge-shaped plate enters the straightening machine first, as shown in Figure 5. When the 2500mm section before the straightening thin plate area, the large and small roll diameter straightening rolls work at the same time, and the large roll diameter straightening rolls play the role of pre-straightening; as shown in Figure 6a and 6b, when the straightening transition zone is 500mm During the period, the upper rollers of the small-diameter straightening roller system are lifted one by one from the inlet end to the outlet end to leave the work until the upper rollers of the small-diameter straightening roller system do not participate in straightening, so as to ensure the stability of the process and the transition of the wedge plate The straightening quality in the straightening area; as shown in Figure 7, when the straightening thick plate area is 2000mm behind, the small roll diameter straightening roll system does not work, and only the large roll diameter straightening roll set works until straightening End.
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| CN113967681A (en) * | 2020-07-22 | 2022-01-25 | 上海飞机制造有限公司 | Equipment for processing multi-curvature elastic piece |
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| CN1488454A (en) * | 2003-09-04 | 2004-04-14 | 张先荣 | Method for increasing roll-type straightening machine capacity |
| JP2015123460A (en) * | 2013-12-26 | 2015-07-06 | Ｊｆｅスチール株式会社 | Straightening method and straightening device of steel plate |
| CN104209373A (en) * | 2014-08-18 | 2014-12-17 | 南京钢铁股份有限公司 | Multi-pass curvature decreasing straightening technology |
| CN104668313A (en) * | 2015-01-30 | 2015-06-03 | 燕山大学 | Roller gap adjustment method of seven-roller thick plate straightener |
| CN105344751A (en) * | 2015-12-15 | 2016-02-24 | 东北大学 | Compound straightening roll system device and flexible straightening method for cold rolling different-thickness plates |
| CN106391760A (en) * | 2016-10-28 | 2017-02-15 | 燕山大学 | Straightening process for wedge-shaped plate |
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| CN113967681A (en) * | 2020-07-22 | 2022-01-25 | 上海飞机制造有限公司 | Equipment for processing multi-curvature elastic piece |
| CN113967681B (en) * | 2020-07-22 | 2023-10-13 | 上海飞机制造有限公司 | Equipment for processing multi-curvature elastic piece |
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