Design method for general hole pattern in size specification and rough and medium rolling mill

Abstract

The embodiment of the invention discloses a general pass design method for size specifications and a rough and medium rolling mill, designs a pass system for a rough and medium rolling mill frame, and adopts the technical scheme that a high-speed area and the finished product size are convenient to control, the material type control degree is simpler and single compared with rough and medium rolling, and the production efficiency is improved. In order to realize the universality of rough and medium rolling material types of different specifications, the cross-group distance material type control is carried out by adopting a means of passing through a rack for different specifications. By means of the hole pattern system and the material pattern adjusting method, production with the specification of 5.5 mm to 50 mm can be achieved, the hole pattern system achieves sharing of hole patterns with the specification of 5.5 mm to 50 mm, and the roller changing workload during specification switching is reduced. And meanwhile, the pass system is high in universality, the number of online rollers used is reduced, and the site of standby rollers is saved. According to the technical scheme, the follow-up process that the materials are transferred to the high-speed wire rod and the large coil wire through a transferring device is omitted, universality of the production line is achieved, the rolling step is omitted, and the production site is also saved.

Description

Technical Field

[0001] This application relates to the field of metal rolling technology, and in particular to a method for designing universal roll pass profiles of various sizes and a roughing and intermediate rolling mill. Background Technology

[0002] Industrial high-speed wire rod production lines typically produce wire rods with a diameter range of 5.5-25mm, while large coil production lines typically produce coils with a diameter range of 15-50mm. Typical manufacturers providing rolling mill equipment, plant design, and process design include Danieli and Morgan. With the development of rolling mill technology, low-investment, high-efficiency production models are gradually emerging. Simultaneously producing high-speed wire rod and large coils with a diameter range of 5.5-50mm on a single production line presents certain challenges. High-speed wire rod generally uses the Stellmo process for post-rolling air cooling, while large coils, due to their large diameter, cannot pass smoothly through the coiling machine and therefore require collection using a coiling drum and controlled cooling by a walking beam. Simultaneously meeting the requirement of full-specification coverage necessitates control over incoming materials to meet the material shape control requirements for both high-speed wire rod and large coils. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] Therefore, the first aspect of the present invention provides a method for designing universal hole types of various sizes.

[0005] A second aspect of the present invention provides a general-purpose roughing and intermediate rolling mill with various sizes.

[0006] In view of this, according to a first aspect of the embodiments of this application, a method for designing universal pass profiles of various sizes and a roughing and intermediate rolling mill are proposed, comprising: Design a pass system for roughing and intermediate rolling mill stands; The hole pattern system includes hole pattern No. 10, irregular hole pattern No. 12, irregular hole pattern No. 14, hole pattern No. 14, hole pattern No. 16, hole pattern No. 18 and hole pattern No. 20; The parameters of the No. 10 die type are: base circle diameter 66.3 mm, groove fillet radius 8 mm, roll gap 9 mm, and sidewall inclination angle 60°. The parameters of the No. 12 irregular hole are: base circle diameter 59.5 mm, groove radius 7 mm, roll gap 8.5 mm, and sidewall inclination angle 60°. The parameters of the No. 14 irregular hole are: base circle diameter 42.5 mm, groove fillet radius 5 mm, roll gap 6 mm, and sidewall inclination angle 60°. The parameters of the No. 14 die are: base circle diameter 39.3 mm, groove fillet radius 4.5 mm, roll gap 5.5 mm, and sidewall inclination angle 60°. The parameters of the No. 16 die are: base circle diameter 31mm, groove fillet radius 3.5mm, roll gap 6, and sidewall inclination angle 60°. The parameters of the No. 18 die are: base circle diameter 25.5 mm, groove fillet radius 3 mm, roll gap 3.5 mm, and sidewall inclination angle 60°. The parameters of the No. 20 die are: base circle diameter 21.1 mm, groove fillet radius 2.75 mm, roll gap 3 mm, and sidewall inclination angle 60°.

[0007] In one feasible implementation, it further includes: Based on the specifications of the bar and wire produced, select whether there is an empty rack and the specific empty rack.

[0008] In one feasible implementation, the step of selecting whether there is an empty rack and the specific empty rack based on the specifications of the produced bar wire includes: Determine the material type requirements based on the specifications of the products being produced; Determine the end stand of the roughing and intermediate rolling mills based on the material type requirements; Control the roughing and intermediate rolling mill stands to achieve failure of the roughing and intermediate rolling mill stands after the end stand.

[0009] In one feasible implementation, the dimensions produced at the end of the roughing and intermediate rolling mill are adjusted by adjusting the roll gap of the pass. In this process, the height dimension of the product produced at the end of the roughing and intermediate rolling mill is adjusted by adjusting the roll gap of the end frame. The width of the product produced at the end of the roughing and intermediate rolling mill is adjusted by adjusting the roll gap of the preceding stand.

[0010] In one feasible implementation, adjusting the feed size at the end of the roughing and intermediate rolling mill by adjusting the roll gap of the pass includes: The target size is A; Select the stand closest to A as the end stand for roughing and intermediate rolling. The production size of this end stand for roughing and intermediate rolling is B, and the difference between B and A is C. Adjust the roll gap of the end stand in the roughing and intermediate rolling mill; the adjustment value is C. Adjust the roll gap of the stand preceding the end stand of the roughing and intermediate rolling mill by setting the value to C+0.3C.

[0011] According to a second aspect of the embodiments of this application, a universal roughing and intermediate rolling mill of various sizes is proposed, which is applied to the universal pass design method of various sizes in any of the above-mentioned embodiments, including: The main body of the rolling mill includes a main frame, a rolling platform, rolling rolls, and a pressing device; A rotating module is disposed on the main body of the rolling mill, and the rotating module realizes the no-pass function of the main body of the rolling mill by rotating. An empty passage is provided on the mounting bracket.

[0012] In one feasible implementation, the rotating module includes: A drive motor is mounted on the main body of the rolling mill; A drive shaft is disposed at the output end of the drive motor; The mounting bracket is a frame-shaped bracket, and one side of the mounting bracket is fixedly connected to the drive shaft.

[0013] In one feasible implementation, the rotation module further includes: A locking component for securing the mounting bracket.

[0014] In one feasible implementation, the empty passage includes: Mounting plate, the mounting plate being disposed on the upper surface of the lower rod of the mounting bracket; A lifting assembly, one end of which is connected to the upper surface of the mounting plate; An empty passage is provided at the other end of the lifting assembly.

[0015] In one feasible implementation, the locking component includes: An electric telescopic component is installed inside the main body of the rolling mill and below the rolling platform; The first positioning hole is formed in the rolling platform; The second positioning hole is formed in the lower rod of the mounting bracket; A positioning pin is provided at the output end of the electric telescopic component, and the positioning rod can pass through both the first positioning hole and the second positioning hole simultaneously.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In this technical solution, because the high-speed zone and finished product size are easy to control, the material shape control is relatively simple and uniform compared to roughing and intermediate rolling. In order to achieve the universality of roughing and intermediate rolling material shapes between different specifications, the method of passing through the stand without material is adopted to control the material shape across groups. The specific end pass design of roughing and intermediate rolling is as shown above.

[0017] The aforementioned die system and material adjustment method enable production of 5.5mm to 50mm specifications with dimensional accuracy meeting production standards. This die system allows for the use of the same die for 5.5mm to 34mm and 47mm to 50mm specifications, reducing roll changing workload during specification switching. Furthermore, the high compatibility of this die system reduces the number of sets of online rolls required, saving spare roll space. This technical solution eliminates the need for subsequent material transfer to high-speed wire rod lines and large coil lines via rotary switches, achieving production line versatility, saving rolling steps, and conserving production space. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic flowchart illustrating the steps of selecting an empty rack according to one embodiment of this application; Figure 2 A schematic flowchart illustrating the steps of adjusting the roll gap of the die type according to one embodiment of this application; Figure 3 A structural block diagram of a general-purpose roughing and intermediate rolling mill of various sizes is provided for an embodiment of this application.

[0019] in, Figure 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100. Rolling mill body; 200. Rotating module; 300. Empty passage; 110. Main frame; 120. Rolling platform; 130. Rolls; 140. Pressing device; 210. Drive motor; 220. Drive shaft; 230. Mounting bracket; 310. Mounting plate; 320. Lifting assembly; 330. Empty passage slot. Detailed Implementation

[0020] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0021] like Figure 1-3 As shown, a method for designing universal hole profiles of varying sizes is proposed according to a first aspect of an embodiment of this application, comprising: include: Design a pass system for roughing and intermediate rolling mill stands; The hole pattern system includes hole pattern No. 10, irregular hole pattern No. 12, irregular hole pattern No. 14, hole pattern No. 14, hole pattern No. 16, hole pattern No. 18 and hole pattern No. 20; The parameters of the No. 10 die type are: base circle diameter 66.3 mm, groove fillet radius 8 mm, roll gap 9 mm, and sidewall inclination angle 60°. The parameters of the No. 12 irregular hole are: base circle diameter 59.5 mm, groove radius 7 mm, roll gap 8.5 mm, and sidewall inclination angle 60°. The parameters of the No. 14 irregular hole are: base circle diameter 42.5 mm, groove fillet radius 5 mm, roll gap 6 mm, and sidewall inclination angle 60°. The parameters of the No. 14 die are: base circle diameter 39.3 mm, groove fillet radius 4.5 mm, roll gap 5.5 mm, and sidewall inclination angle 60°. The parameters of the No. 16 die are: base circle diameter 31mm, groove fillet radius 3.5mm, roll gap 6, and sidewall inclination angle 60°. The parameters of the No. 18 die are: base circle diameter 25.5 mm, groove fillet radius 3 mm, roll gap 3.5 mm, and sidewall inclination angle 60°. The parameters of the No. 20 die are: base circle diameter 21.1 mm, groove fillet radius 2.75 mm, roll gap 3 mm, and sidewall inclination angle 60°.

[0022] This application provides a general pass design method. Currently, the production line is arranged with roughing and intermediate rolling mills No. 1 to No. 20. After No. 20, the line is divided into two lines by a turntable. The first line is the high-speed wire rod mills No. 21 to No. 34, and the second line is the large coil mills No. 1 to No. 4.

[0023] Mills 1 to 5 use a 750 type mill, mills 6 to 10 use a 550 type mill, mills 11 to 14 use a 450 type mill, mills 15 to 20 use a 350 type mill, mills 21 to 22 use a Danieli BGV2P type modular mill, mills 23 to 30 use a Danieli BCV8P type modular mill, and mills 31 to 34 use a Danieli TMB type modular mill. Mills 21 to 26 use 250 type roll rings, mills 27 to 32 use 200 type roll rings, and mills 33 and 34 use 150 type roll rings.

[0024] High-speed wire rod production specifications range from 5.5mm to 20mm, and large coil production specifications range from 21mm to 50mm. Different specifications have different requirements for the incoming material type of the front roughing and intermediate rolling mill end stands. See the table below for specific data:

[0025] In this technical solution, because the high-speed zone and finished product size are easy to control, the material shape control is relatively simple and uniform compared to roughing and intermediate rolling. In order to achieve the universality of roughing and intermediate rolling material shapes between different specifications, the method of passing through the stand without material is adopted to control the material shape across groups. The specific end pass design of roughing and intermediate rolling is as shown above.

[0026] The aforementioned die system and material profile adjustment method enable the production of 5.5mm to 50mm specifications with dimensional accuracy meeting production standards. This die system allows for the use of the same die profiles for 5.5mm to 34mm and 47mm to 50mm specifications. Furthermore, the 35mm to 46mm specifications can be made compatible with this system by changing the die profile on the end stand, reducing the workload of roll changing during specification switching. The high compatibility of this die system also reduces the number of sets of online rolls used, saving spare roll space. This technical solution eliminates the need for subsequent material transfer to high-speed wire rod lines and large coil lines via rotary switches, achieving production line versatility, saving rolling steps, and conserving production space.

[0027] like Figure 1-2 As shown, it also includes: Based on the specifications of the bar and wire produced, select whether there is an empty rack and the specific empty rack.

[0028] In this technical solution, the corresponding empty run-through frame can be pre-set in the control system according to the specifications of the target product. For example, when producing φ31.8mm incoming material, the machine runs empty through machines 17 to 20, with machine 16 as the path for the final roughing and intermediate rolling stand.

[0029] In practice, the rolls of the stand that need to be passed through empty can be opened by the electric or hydraulic pressing system of the rolling mill, so that the roll gap is large enough to be a safe value, ensuring that the rolled piece does not come into contact with the rolls and does not undergo plastic deformation when passing through, thus realizing the empty passage of the rolling mill.

[0030] This technical solution allows for the production of products ranging from 5.5mm to 50mm in size within the same fixed roughing and intermediate rolling mill pass system by selecting different blanking paths, achieving one-line versatility.

[0031] When switching specifications, there is no need to change the rolls or the roll pattern. Simply change the empty pass mode through the control system. The time taken for changing rolls is reduced from several hours to a few minutes or even seconds, which greatly improves the operating rate and production efficiency.

[0032] like Figure 1-2 As shown, the step of selecting whether there is an empty rack and the specific empty rack based on the specifications of the produced bar wire includes: Step 101: Determine the material requirements based on the specifications of the products to be produced; Step 102: Determine the end stand of the roughing and intermediate rolling mills according to the material type requirements; Step 103: Control the roughing and intermediate rolling mill stands to achieve failure of the roughing and intermediate rolling mill stands after the end stand.

[0033] In this technical solution, the failure of the roughing and intermediate rolling mill after the end stand is achieved by controlling the roll gap reduction structure to maximize the distance between the two rolls, thereby leaving a gap for material to pass through.

[0034] In this embodiment, the step further includes rotating the empty passage to the target position using a rotating module, thereby further facilitating the passage of materials.

[0035] like Figure 1-2 As shown, it also includes: Step 201: Adjust the dimensions produced at the end of the roughing and intermediate rolling mill by adjusting the roll gap of the pass. Step 202: The height dimension of the product produced at the end of the roughing and intermediate rolling mill is adjusted by adjusting the roll gap of the end stand. Step 203: Adjust the width of the product produced at the end of the roughing and intermediate rolling mill by adjusting the roll gap of the first stand before the end stand.

[0036] In this technical solution, all the die types have a certain roll gap. Through the design of the roll gap, the function of widening the distance between the two rolls to complete the empty pass is realized, and the function of adjusting the incoming material size can also be realized by finely adjusting the roll gap.

[0037] When producing materials of different specifications, since the height and width of the materials are not compressed equally, a processing method is proposed that involves coordinating the end frame and the preceding frame. By controlling the roll gap size of the end frame, the height dimension of the die can be adjusted, thereby controlling the height of the produced material. Conversely, by adjusting the height dimension of the die in the preceding frame, the width of the produced material can be controlled. This achieves precise control over the material produced by the end frame.

[0038] This feature enables the hole pattern system to adapt to a wider range of material size requirements, thereby reducing the frame setup and increasing versatility.

[0039] like Figure 1-2 As shown, adjusting the feed size at the end of the roughing and intermediate rolling mill by adjusting the roll gap of the die includes: The target size is A; Select the stand closest to A as the end stand for roughing and intermediate rolling. The production size of this end stand for roughing and intermediate rolling is B, and the difference between B and A is C. Adjust the roll gap of the end stand in the roughing and intermediate rolling mill; the adjustment value is C. Adjust the roll gap of the stand preceding the end stand of the roughing and intermediate rolling mill by setting the value to C+0.3C.

[0040] In this technical solution, based on my actual production experience, the change in height of the rolled piece when the roll gap is reduced in the current pass is equal to the change in roll gap, while the change in width is the change in height plus 0.3 times the change in height.

[0041] Therefore, the actual adjustment method is as follows: the roll gap adjustment value of the end frame is the height change value of the material, and the roll gap adjustment value of the frame before the end frame is the width change value of the material width change value minus 0.3.

[0042] For example, if the output material is adjusted from φ39.5 to φ39.3, and the gaps between rolls 13 and 14 are each narrowed by 0.2mm, the output material size will be φ39.3×39.36mm. Therefore, by adjusting the gap between roll 13 to 0.26mm, the produced material will meet the usage requirements.

[0043] like Figure 3 As shown, according to a second aspect of the embodiments of this application, a universal roughing and intermediate rolling mill of various sizes is proposed, which is applied to the universal roll pass design method of any one of the above-mentioned sizes, comprising: a rolling mill body 100, the rolling mill body 100 including a main frame 110, a rolling platform 120, rolls 130 and a pressing device 140; a rotation module 200, the rotation module 200 being disposed on the rolling mill body 100, the rotation module 200 realizing the no-pass function of the rolling mill body 100 by rotation; and a no-pass channel 300, the no-pass channel 300 being disposed on the mounting bracket 230.

[0044] This technical solution proposes a roughing and intermediate rolling mill to achieve the idle pass function mentioned in the above method. Most of the structure within the mill body 100 is prior art and will not be described in detail in this technical solution.

[0045] The rotating module 200 is disposed on the rolling platform 120 of the main body 100 of the rolling mill, and the empty passage 300 is disposed on the rotating module 200. When the roughing and intermediate rolling mill needs to process the material, the rotating module 200 is rotated outward so that the empty passage 300 is located outside the rolling platform 120. When the roughing and intermediate rolling mill needs to pass the material empty, the rotating module 200 is rotated inward so that the empty passage 300 is located between the two rolls 130, and the material can pass through the empty passage 300 empty.

[0046] It is understandable that the empty passage 300 has a certain width along the material travel direction.

[0047] This technical solution can achieve both the normal rolling function of the roughing and intermediate rolling mills and the provision of a platform for material to pass through when it is required, making the material's passage path more stable. Compared with the material passing through directly above the roll 130, this technical solution can effectively reduce the material's offset and deformation during passage, and significantly improve the passage effect.

[0048] like Figure 3 As shown, the rotating module 200 includes: a drive motor 210, which is disposed on the mill body 100; a drive shaft 220, which is disposed at the output end of the drive motor 210; a mounting bracket 230, which is a frame-shaped bracket, and one side of the mounting bracket 230 is fixedly connected to the drive shaft 220; and the empty passage 300 is disposed on the mounting bracket 230.

[0049] In this technical solution, the rotating module 200 includes a drive motor 210, a drive shaft 220, and a mounting bracket 230.

[0050] The drive shaft 220 is longitudinally and rotatably disposed on one side of the rolling platform 120, the drive motor 210 is disposed at one end of the drive shaft 220, and the mounting bracket 230 is fixedly connected to the drive shaft 220.

[0051] During use, the drive motor 210 rotates via the drive shaft, which in turn drives the mounting bracket 230 to rotate. The output end of the drive motor 210 has two positioning positions. When the drive motor 210 is in the first positioning state, the idle passage 300 is in a position that does not affect the rolling of the roughing and intermediate rolling mills. When the drive motor 210 is in the second positioning state, the idle passage 300 is in a position where the idle passage function can be completed.

[0052] like Figure 3 As shown, the rotation module 200 further includes a locking component for fixing the mounting bracket 230.

[0053] In this technical solution, the rotating module 200 also includes a locking component. When the material passes through the empty passage 300, the material will generate friction on the empty passage 300. If the empty passage 300 is limited only by the drive motor 210, firstly, the limiting effect of the drive motor 210 is limited, and the empty passage 300 will still shake. Secondly, it will easily affect the service life of the drive motor 210. Therefore, a locking component is added to fix the fixed bracket and the empty passage 300 during the empty passage, thereby further improving the stability of this technical solution.

[0054] like Figure 3As shown, the empty passage 300 includes: a mounting plate 310, which is disposed on the upper surface of the lower rod of the mounting bracket 230; a lifting assembly 320, one end of which is connected to the upper surface of the mounting plate 310; and an empty passage groove 330, which is disposed at the other end of the lifting assembly 320.

[0055] In this technical solution, the empty passage 300 includes a mounting plate 310, a lifting assembly 320, and an empty passage groove 330. The mounting plate 310 is disposed on the upper surface of the lower rod of the mounting bracket 230 to provide an installation base for the lifting assembly 320, thereby achieving stable installation of the lifting assembly 320. One end of the lifting assembly 320 is connected to the mounting plate 310, and the other end is connected to the empty passage groove 330. The lifting assembly 320 can adjust the height of the empty passage groove 330, so that the empty passage groove 330 can be adjusted to match the height of the preceding and following machine frames. This setting can improve the smoothness of material empty passage, avoid material jamming due to height differences, and further reduce the deformation of materials during empty passage.

[0056] like Figure 3 As shown, the locking assembly includes: an electric telescopic component, which is disposed inside the mill body 100 and below the rolling platform 120; a first positioning hole, which is opened in the rolling platform 120; a second positioning hole, which is opened in the lower rod of the mounting bracket 230; and a positioning pin, which is disposed at the output end of the electric telescopic component, and the positioning rod can pass through the first positioning hole and the second positioning hole simultaneously.

[0057] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for designing universal hole types of various sizes, characterized in that, include: Design a pass system for roughing and intermediate rolling mill stands; The hole pattern system includes hole pattern No. 10, irregular hole pattern No. 12, irregular hole pattern No. 14, hole pattern No. 14, hole pattern No. 16, hole pattern No. 18 and hole pattern No. 20; The parameters of the No. 10 die type are: base circle diameter 66.3 mm, groove fillet radius 8 mm, roll gap 9 mm, and sidewall inclination angle 60°. The parameters of the No. 12 irregular hole are: base circle diameter 59.5 mm, groove radius 7 mm, roll gap 8.5 mm, and sidewall inclination angle 60°. The parameters of the No. 14 irregular hole are: base circle diameter 42.5 mm, groove fillet radius 5 mm, roll gap 6 mm, and sidewall inclination angle 60°. The parameters of the No. 14 die are: base circle diameter 39.3 mm, groove fillet radius 4.5 mm, roll gap 5.5 mm, and sidewall inclination angle 60°. The parameters of the No. 16 die are: base circle diameter 31mm, groove fillet radius 3.5mm, roll gap 6, and sidewall inclination angle 60°. The parameters of the No. 18 die are: base circle diameter 25.5 mm, groove fillet radius 3 mm, roll gap 3.5 mm, and sidewall inclination angle 60°. The parameters of the No. 20 die are: base circle diameter 21.1 mm, groove fillet radius 2.75 mm, roll gap 3 mm, and sidewall inclination angle 60°.

2. The method for designing universal hole types of various sizes according to claim 1, characterized in that, Also includes: Based on the specifications of the bar and wire produced, select whether there is an empty rack and the specific empty rack.

3. The method for designing universal hole types of various sizes according to claim 2, characterized in that, The step of selecting whether there is an empty rack and the specific empty rack based on the specifications of the produced bar wire includes: Determine the material type requirements based on the specifications of the products being produced; Determine the end stand of the roughing and intermediate rolling mills based on the material type requirements; Control the roughing and intermediate rolling mill stands to achieve failure of the roughing and intermediate rolling mill stands after the end stand.

4. The method for designing universal hole types of various sizes according to claim 1, characterized in that, Also includes: The dimensions produced at the ends of the roughing and intermediate rolling mills can be adjusted by adjusting the roll gap of the roll pass. In this process, the height dimension of the product produced at the end of the roughing and intermediate rolling mill is adjusted by adjusting the roll gap of the end frame. The width of the product produced at the end of the roughing and intermediate rolling mill is adjusted by adjusting the roll gap of the preceding stand.

5. The method for designing universal hole types of various sizes according to claim 4, characterized in that, The method of adjusting the roll gap of the roughing and intermediate rolling mills to adjust the incoming material size at the end of the rolling mill includes: The target size is A; Select the stand closest to A as the end stand for roughing and intermediate rolling. The production size of this end stand for roughing and intermediate rolling is B, and the difference between B and A is C. Adjust the roll gap of the end stand in the roughing and intermediate rolling mill; the adjustment value is C. Adjust the roll gap of the stand preceding the end stand of the roughing and intermediate rolling mill by setting the value to C+0.3C.

6. A general-purpose roughing and intermediate rolling mill of various sizes, characterized in that, The method for designing universal hole profiles of varying sizes, applied to any one of the preceding claims, includes: The main body of the rolling mill includes a main frame, a rolling platform, rolling rolls, and a pressing device; A rotating module is disposed on the main body of the rolling mill, and the rotating module realizes the no-pass function of the main body of the rolling mill by rotating. An empty passage is provided in the rotating module.

7. The universal roughing and intermediate rolling mill of various sizes according to claim 6, characterized in that, The rotation module includes: A drive motor is mounted on the main body of the rolling mill; A drive shaft is disposed at the output end of the drive motor; The mounting bracket is a frame-shaped bracket, and one side of the mounting bracket is fixedly connected to the drive shaft; The empty passage is provided on the mounting bracket.

8. The universal roughing and intermediate rolling mill of various sizes according to claim 7, characterized in that, The rotation module also includes: A locking component for securing the mounting bracket.

9. The general-purpose roughing and intermediate rolling mill of various sizes according to claim 7, characterized in that, The empty passage includes: Mounting plate, the mounting plate being disposed on the upper surface of the lower rod of the mounting bracket; A lifting assembly, one end of which is connected to the upper surface of the mounting plate; An empty passage is provided at the other end of the lifting assembly.

10. The universal roughing and intermediate rolling mill of various sizes according to claim 8, characterized in that, The locking component includes: An electric telescopic component is installed inside the main body of the rolling mill and below the rolling platform; The first positioning hole is formed in the rolling platform; The second positioning hole is formed in the lower rod of the mounting bracket; A positioning pin is provided at the output end of the electric telescopic component, and the positioning rod can pass through both the first positioning hole and the second positioning hole simultaneously.

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