Square billet switching rolling method for wire rod rolling production line and wire rod rolling system
By adjusting the rolling speed of the rolling mill and using an electronic control module, the problem of low efficiency in the wire rod rolling production line when switching between different specifications of square billets was solved, achieving rapid switching and efficient production.
Patent Information
- Application Number
- CN202511598865.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-04
- Publication Date
- 2025-12-12
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the existing technology, the wire rod rolling production line requires a lot of time and manpower to switch between different specifications of billets, and multiple sets of rolling mills and guide devices need to be kept on standby, resulting in cost waste and product quality problems.
By adjusting the rolling speed of each mill stand, the volume of the billet passing through any mill within a unit time is ensured to be consistent, avoiding the need for readjustment of the roll gap and guide device. The rolling speed is automatically adjusted by an electronic control module to adapt to billets of different specifications.
It enables rapid switching between different specifications of square billets on the same rolling system, improving production efficiency, reducing manual adjustment time and costs, and ensuring product quality.
Smart Images
Figure CN121103841A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of wire rod rolling, in particular to a rolling method for switching billets in a wire rod rolling production line and a wire rod rolling system. BACKGROUND
[0002] Currently, in the wire rod rolling production, each specification of billet usually corresponds to a specific set of rolling system. If different specifications of billets need to be processed on the same set of rolling system, the roll gap needs to be re-adjusted, and the guide device needs to be disassembled and reassembled, and the rolling speed of each stand needs to be set again. In the prior art, it takes 2-3 hours to disassemble and assemble the rolling mill and related process equipment each time, which cannot realize the rapid switching of different specifications of billets, not only the operation amount is large and the time is long, but also multiple sets of rolling mills and guide devices need to be prepared on site, which causes waste of cost. In addition, after each time of re-starting, the speed of each stand of rough rolling and intermediate rolling needs to be adjusted again, and the product size and surface quality need to be checked, which is easy to cause process accidents and product quality problems.
[0003] Therefore, the above problems need to be solved. SUMMARY
[0004] The purpose of the present application is to provide a rolling method for switching billets in a wire rod rolling production line, so as to improve the switching efficiency of different specifications of billets on the same set of rolling system, and further improve the production efficiency of wire rods.
[0005] To achieve this purpose, the present application adopts the following technical solutions:
[0006] The rolling method for switching billets in a wire rod rolling production line, the wire rod rolling production line comprises a plurality of stands of rolling mills with pass types, and the plurality of stands of rolling mills are sequentially arranged according to the pass type size;
[0007] The rolling method comprises:
[0008] Obtaining the elongation coefficient of each stand of rolling mill corresponding to different specifications of billets;
[0009] Setting the transportation speed of the finished wire rod obtained after the different billets are processed by the wire rod rolling production line to be consistent, and calculating the rolling speed of each stand of rolling mill corresponding to different specifications of billets according to the elongation coefficient;
[0010] When switching different specifications of billets, the rolling speed of each stand of rolling mill is adjusted to the corresponding value.
[0011] Preferably, the plurality of stands of rolling mill are divided into a rough rolling mill group, an intermediate rolling mill group and a finish rolling mill group;
[0012] The rolling method further comprises that the rolling speed of the rough rolling mill at the end of the rough rolling mill group is the same during the rolling process of different specifications of billets.
[0013] As preferred, in the rough rolling mill group: the pass of the 2N-1th rough rolling mill is an oval pass, and the pass of the 2Nth rough rolling mill is a round pass, wherein N≥2.
[0014] As preferred, in the rough rolling mill group: the pass of the first rough rolling mill is a box pass, and the pass of the second rough rolling mill is a vertical box pass, and the chamfer size of the box pass and the vertical box pass is 18mm-22mm.
[0015] As preferred, the rolling speed of the multiple rough rolling mills corresponding to the different sizes of the square billets is calculated according to the elongation coefficient, and the rolling speed of the multiple rough rolling mills corresponding to the different sizes of the square billets comprises:
[0016] ;
[0017] wherein, is the rolling speed of the n-1th rough rolling mill, is the rolling speed of the nth rough rolling mill; is the elongation coefficient of the nth rough rolling mill, n≥2;
[0018] As preferred, the elongation coefficient of the multiple rough rolling mills corresponding to the different sizes of the square billets is obtained, and the elongation coefficient of the multiple rough rolling mills corresponding to the different sizes of the square billets comprises:
[0019] ;
[0020] wherein, is the elongation coefficient of the nth rough rolling mill, is the pass area of the n-1th rough rolling mill; is the pass area of the nth rough rolling mill, n≥1.
[0021] As preferred, the driving systems of all the rough rolling mills are electrically connected to the same electric control module, and the electric control module stores different rolling speeds of each rough rolling mill, and each rolling speed is matched with a different square billet;
[0022] The rolling method further comprises: adjusting the rolling speed of each rough rolling mill by the controller.
[0023] As preferred, the electric control module is a PLC controller.
[0024] A wire rod rolling system, comprising a wire rod rolling production line and an electric control module, the wire rod rolling production line comprising multiple rough rolling mills, and the multiple rough rolling mills are arranged in order according to the pass size.
[0025] The electric control module is used to execute the above-mentioned rolling method.
[0026] As preferred, the multiple rough rolling mills are six rough rolling mills, and the passes of the six rough rolling mills are a box pass, a vertical box pass, an oval pass, a round pass, an oval pass, and a round pass in order.
[0027] The beneficial effects of the present application are as follows:
[0028] The wire rod rolling production line switching billet rolling method and the wire rod rolling system in the present application can ensure the volume consistency of the billet passing through any rolling mill in unit time by adjusting the rolling speed of each rolling mill for different specifications of the billets, so that the same wire rod rolling system can be adapted to billets of different specifications without the need of re-adjusting the roll gap and replacing the guide device, which can greatly improve the switching efficiency of the rolling system switching billets of different specifications, and further improve the production efficiency of the wire rod. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 is a structure diagram of each pass in the roughing mill group in the present application. DETAILED DESCRIPTION
[0030] The present application will be further described in detail below in conjunction with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.
[0031] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0032] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "above" of the first feature to the second feature includes the vertical and oblique above of the first feature to the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature includes the vertical and oblique below of the first feature to the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0033] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.
[0034] The present embodiment proposes a wire rod rolling system, which includes a wire rod rolling production line composed of multiple sets of hole type rolling mills, and the multiple sets of rolling mills are sequentially arranged according to the hole type size. It can be understood that the high-temperature wire rod will pass through each rolling mill in turn, and as the wire rod is continuously conveyed, the shape and area of the cross section of the square billet gradually decrease until the desired wire rod is obtained.
[0035] In order to facilitate the wire rod rolling system to be applicable to square billets of different specifications, the present embodiment further proposes a rolling method for switching square billets of a wire rod rolling production line. The rolling method aims to roll square billets of different specifications without the need to re-adjust the roll gap and replace the guide device, so as to improve the switching efficiency of the rolling system when switching square billets of different specifications.
[0036] Specifically, the rolling method comprises:
[0037] obtaining the elongation coefficient of each set of rolling mill corresponding to square billets of different specifications;
[0038] setting the transportation speed of the finished wire rod obtained after the different square billets are processed by the wire rod rolling production line to be consistent, and calculating the rolling speed of the multiple sets of rolling mills corresponding to the square billets of different specifications according to the elongation coefficient;
[0039] adjusting the rolling speed of each set of rolling mill to the corresponding value when switching square billets of different specifications.
[0040] It can be understood that for square billets of different specifications, the rolling speed of each rolling mill is adjusted to ensure that the volume of the square billet passing through any rolling mill per unit time is consistent, so that the same wire rod rolling system can be adapted to square billets of different specifications without the need to re-adjust the roll gap and replace the guide device. Such a setting can greatly improve the switching efficiency of the same set of rolling system for square billets of different specifications.
[0041] The elongation coefficient of each set of rolling mill corresponding to square billets of different specifications is obtained according to formula one, wherein formula one is:
[0042] ;
[0043] wherein, is the elongation coefficient of the nth set of rolling mill, is the pass area of the n-1th rolling mill, is the pass area of the n-1th rolling mill,
[0044] It can be understood that, in the process of obtaining the elongation coefficient, the area of each pass needs to be obtained first, and then the elongation coefficient of the next rolling mill can be obtained by comparing the areas of two adjacent passes.
[0045] It should be noted that, refers to the area of the square billet, refers to the pass area of the first rolling mill, which is obtained by comparing and , the elongation coefficient of the first rolling mill can be obtained.
[0046] Further, the rolling speed of the multiple rolling mills corresponding to different specifications of square billets is calculated according to Formula Two, wherein Formula Two is:
[0047] ;
[0048] wherein, is the rolling speed of the n-1th rolling mill, is the rolling speed of the n-1th rolling mill, is the elongation coefficient of the n-1th rolling mill, n≥2.
[0049] By combining Formula One and Formula Two, Formula Three can be obtained, wherein Formula Three is:
[0050] ;
[0051] The wire rod rolling system can ensure that when different square billets are processed, according to Formula Three, by adjusting the rolling speed of the rolling mill, the volume of the corresponding square billet passing through each rolling mill can be ensured to be the same, thereby ensuring the smooth rolling and realizing the rapid switching of square billets of different specifications.
[0052] It should be noted that the transportation speed of the finished wire rod is the rolling speed of the last rolling mill, and the rolling speed of the rolling mill is determined according to the power of its transmission system and the actual working condition, which is not limited here, so according to the above Formula Two, the rolling speed of each rolling mill can be calculated by inverse rolling sequence.
[0053] Further, the wire rod rolling system further comprises an electric control module electrically connected with the transmission systems of all the rolling mills, and the electric control module is configured to adjust the rolling speeds of the rolling mills. It can be understood that, before processing the square billets of different specifications, the elongation coefficients of the rolling mills are first calculated based on Formula One, and then the rolling speeds of the rolling mills are calculated based on Formula Two, and the sizes of the square billets of different specifications and the rolling speeds of the rolling mills corresponding to the square billets of different specifications are stored in the memory of the electric control module, wherein the electric control module is preferably a PLC controller. After the square billet of one specification is rolled, the electric control module calls the data of the square billet of the next specification, and adjusts the rolling speeds of the rolling mills according to the rolling speed corresponding to the data of the square billet. In this way, the rolling speeds of the rolling mills do not need to be manually adjusted by manpower, thereby improving the switching efficiency of the square billets of different specifications.
[0054] In the process of rolling the wire rod, in order to ensure the finished product quality of the wire rod, the plurality of rolling mills are divided into a rough rolling mill group, a medium rolling mill group and a finishing rolling mill group; since the rough rolling mill group bears most of the deformation of the square billet, and the medium rolling mill group and the finishing rolling mill group are for micro-shaping the rolled piece, therefore, the rolling method proposed in the embodiment further comprises that, during the rolling process of the square billets of different specifications, the rolling speeds of the rough rolling mills at the end of the rough rolling mill group are the same. It can be understood that, after the rough rolling is completed, the switching of the square billets of different specifications is completed, and the initial difference caused by the two different sizes of the billets is accommodated and digested through the sufficient deformation in the rough rolling process. Moreover, since the switching of the square billets is limited to the rough rolling stage, when the rolling speeds of the rolling mills are adjusted, only the rolling speeds of the rough rolling mills in the rough rolling mill group need to be adjusted, and the rolling speeds of all the rolling mills do not need to be adjusted, thereby further improving the switching efficiency of the square billets of different specifications.
[0055] In addition, in the rough rolling mill group, the pass type of the first rough rolling mill is a box pass, the pass type of the second rough rolling mill is a vertical box pass, the pass type of the 2N-1th rough rolling mill is an elliptical pass, and the pass type of the 2Nth rough rolling mill is a round pass, wherein N≥2. It can be understood that, from the third rolling mill, the pass types at the odd positions are elliptical passes, and the pass types at the even positions are round passes. In this way, the rolling defects such as cracks or ears on the surface of the square billets after rough processing can be avoided, thereby ensuring the finished product quality of the wire rod.
[0056] It should be noted that the size of the box pass should be selected to allow different sizes of square billets to enter, and the effective working range of the twist guide of the rough rolling mill group between the first rough rolling mill and the second rough rolling mill should be adapted to the width, height and contour of the rolled piece obtained after the square billets of different specifications are rolled by the first rough rolling mill, and the sizes of the square billets of different specifications after being roughed by the rough rolling mill group are consistent, so that the guide does not need to be replaced when the square billets of different specifications are replaced.
[0057] Further, the box hole and the vertical box hole are both provided with a chamfer, and the chamfer can protect the corner of the square billet when the square billet passes through the box hole and the vertical box hole, so as to further avoid cracks or ears on the surface of the square billet after rough machining, thereby ensuring the quality and dimensional accuracy requirements of high-end wire rod products such as cold heading steel, spring steel, and high-carbon steel.
[0058] The chamfer size is 18mm-22mm. Preferably, it is 20mm. In this way, different specifications of square billets can be fully protected when passing through the box hole and the vertical box hole.
[0059] As shown in the example of FIG. 6, Figure 1 The rough rolling mill set includes six rolling mills, and the pass sequence of the six rolling mills is box hole, vertical box hole, oval, circle, oval, and circle. The pass depth D1 of the 1# rolling mill is 47mm, the pass width W1 is 194mm, and the rolling piece height H1 of the 1# rolling mill is 111mm. The pass depth D2 of the 2# rolling mill is 53mm, the pass width W2 is 136mm, and the rolling piece height H2 of the 2# rolling mill is 118mm. The pass depth D3 of the 3# rolling mill is 34mm, the pass width W3 is 155.72mm, and the rolling piece height H3 of the 3# rolling mill is 78mm. The radius R4 of the 4# rolling mill is 49.5mm, and the rolling piece size of the 4# rolling mill is Φ96mm. The pass depth D5 of the 5# rolling mill is 23.5mm, the pass width W5 is 133.82mm, and the rolling piece height H5 of the 5# rolling mill is 55mm. The radius R6 of the 6# rolling mill is 37mm, and the rolling piece size of the 6# rolling mill is Φ72mm.
[0060] In addition, taking 140mm square billets and 160mm square billets as examples, the extension coefficients of each rolling mill corresponding to different square billets are calculated by Formula One, as shown in the following table:
[0061]
[0062] Subsequently, the rolling speeds of each rolling mill corresponding to different square billets are calculated according to Formula Two and stored in the storage. When the 140mm square billets and the 160mm square billets are switched, the rolling speed can be adjusted based on the difference in the extension coefficient in the above table. For example, when the 140mm square billets are produced and need to be converted to 160mm square billets, the extension coefficient should be increased according to the difference; when the 160mm square billets are produced and need to be converted to 140mm square billets, the extension coefficient should be decreased according to the difference.
[0063] Obviously, the above embodiments of the present application are merely exemplary but not intended to limit the embodiments of the present application. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. It is not necessary or possible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.
Claims
1. A method for switching to square billet rolling in a wire rod rolling production line, characterized in that, The wire rod rolling production line includes multiple rolling mills with passes, and the multiple rolling mills are arranged sequentially according to the size of the passes; The rolling method includes: Obtain the elongation coefficient of each stand of the rolling mill corresponding to different specifications of square billets; The transport speed of finished wire rods obtained after different square billets are processed by the wire rod rolling production line is set to be the same, and the rolling speed of multiple rolling mills corresponding to different specifications of square billets is calculated according to the elongation coefficient. When switching between different specifications of square billets, the rolling speed of each stand of the rolling mill is adjusted to the corresponding value.
2. The rolling method for switching to square billets in a wire rod rolling production line according to claim 1, characterized in that, The rolling mills described above are divided into roughing mills, intermediate mills, and finishing mills; The rolling method further includes: during the rolling process of square billets of different specifications, the rolling speed of the last roughing mill in the roughing mill group is the same.
3. The rolling method for switching to square billets in a wire rod rolling production line according to claim 2, characterized in that, In the roughing mill unit: the roughing mill of the 2N-1th stand has an elliptical pass, and the roughing mill of the 2Nth stand has a circular pass, wherein N≥2.
4. The rolling method for switching to square billets in a wire rod rolling production line according to claim 2, characterized in that, In the roughing mill unit: the first roughing mill has a box-shaped pass, the second roughing mill has a vertical box-shaped pass, and the chamfer size of the box-shaped pass and the vertical box-shaped pass is 18mm-22mm.
5. The rolling method for switching to square billets in a wire rod rolling production line according to claim 1, characterized in that, The calculation of the rolling speed for multiple rolling mills corresponding to different specifications of square billets based on the elongation coefficient includes: ； in, Let n be the rolling speed of the (n-1)th rolling mill. Let n be the rolling speed of the nth rolling mill; Let be the elongation coefficient of the nth mill, where n ≥ 2.
6. The rolling method for switching to square billets in a wire rod rolling production line according to claim 1, characterized in that, The elongation coefficients obtained when acquiring square billets of different specifications for each stand of the rolling mill include: ； in, Let be the elongation coefficient of the nth rolling mill. Let n be the roll pass area of the (n-1)th rolling mill. Let n be the roll pass area of the nth rolling mill, where n ≥ 1.
7. The rolling method for switching to square billets in a wire rod rolling production line according to claim 1, characterized in that, The drive systems of all the rolling mills are electrically connected to the same control module, which stores the different rolling speeds of each rolling mill, and each rolling speed is matched to a different billet. The rolling method further includes adjusting the rolling speed of each rolling mill via a controller.
8. The rolling method for switching to square billets in a wire rod rolling production line according to claim 7, characterized in that, The electrical control module is a PLC controller.
9. A wire rod rolling system, characterized in that, It includes a wire rod rolling production line and an electrical control module. The wire rod rolling production line includes multiple pass mills, which are arranged sequentially according to the size of the pass. The electronic control module is used to execute the rolling method according to any one of claims 1-8.
10. The wire rolling system according to claim 9, characterized in that, The rolling mill comprises six roughing mills, the pass types of which are, in order, box pass, vertical box pass, ellipse, circle, ellipse, and circle.