Roll assembly for rolling profiled steel and rolling mill train

Abstract

The application provides a roller assembly for rolling special-shaped steel and a rolling mill unit. The roller assembly for rolling special-shaped steel comprises an upper roller, a lower roller, a left roller and a right roller. The left roller has a left forming surface, the right roller has a right forming surface, the upper roller has an upper forming surface, and the lower roller has a lower forming surface. The left forming surface, the right forming surface, the upper forming surface and the lower forming surface jointly form a forming cavity. The upper roller and the lower roller can move along the up-down direction respectively. The left roller and the right roller can move along the left-right direction respectively. The roller assembly can be suitable for special-shaped steels with similar shapes but different sizes. When the cavity wall of the forming cavity is worn, the roller assembly can be compensated on line without stopping production and disassembling the rollers, so that the production efficiency is ensured and the purchase cost of the rollers is saved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of hot-rolled section steel, and particularly relates to a roller assembly for rolling special-shaped steel and a rolling mill unit. BACKGROUND

[0002] At present, the commonly used rolling process for special-shaped steel is as follows: a rectangular billet or a square billet is finally rolled into a target-shaped special-shaped steel through multiple box-type holes, split holes, pre-mold cavities and finished product holes.

[0003] Taking a forklift beam section steel as an example, the forklift beam section steel is steel used for manufacturing a forklift fork frame beam, which is supported on a load-bearing component of a forklift, so that the performance, dimensional accuracy and surface quality of the forklift beam section steel are required to be high. Figure 1 As shown in the figure, the cross section of the forklift beam section steel is composed of a right-angled trapezoidal area 1 and a rectangular area 2, which is special-shaped steel. The width of the right-angled trapezoidal area 1 is H1, and the thickness is B1. The width of the rectangular area 2 is H, and the thickness is B. Figure 2 As shown in the figure, the rolling assembly of the special-shaped steel rolling mill in the prior art includes an upper rolling roller 3 and a lower rolling roller 4. The upper rolling roller 3 and the lower rolling roller 4 form a mold cavity matched with the shape of the target special-shaped steel, and the steel is rolled into the required shape when passing through the mold cavity.

[0004] In most different specifications of forklift beam section steel, the thickness B1 and the width H1 of the right-angled trapezoidal area 1 are the same, so the special-shaped steel rolling mill only needs to adjust the width H and the thickness B of the rectangular area 2 of the forklift beam section steel, that is, the special-shaped steel rolling mill can be used for most different specifications of forklift beam section steel. However, the width H and the thickness B of the rectangular area of the forklift beam section steel rolled by the special-shaped steel rolling mill in the prior art are adjusted in a small range, which leads to low production efficiency of the workshop in producing multiple specifications of forklift beam section steel, and large investment in rolling rollers. Moreover, when the rolling roller is worn, only the rolling roller can be replaced, and the consumption of the rolling roller is large, which further increases the cost.

[0005] Therefore, it is necessary to provide an improved technical solution for the above-mentioned deficiencies in the prior art. SUMMARY

[0006] The purpose of the present application is to overcome the problems of low production efficiency and high cost of the special-shaped steel rolling mill in the prior art.

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical solution: a roller assembly for rolling special-shaped steel, comprising:

[0008] upper roller, lower roller, left roller and right roller, the left roller has a left forming surface, the right roller has a right forming surface, the upper roller has an upper forming surface, the lower roller has a lower forming surface, the left forming surface, the right forming surface and the upper forming surface and the lower forming surface jointly enclose a forming cavity;

[0009] The upper roller and the lower roller are capable of moving in the up-down direction respectively.

[0010] The left roller and the right roller are capable of moving in the left-right direction respectively.

[0011] Further, at least one of the left forming surface and the right forming surface is a non-planar surface.

[0012] Further, the left forming surface is a non-planar surface, and the left forming surface comprises a first planar surface, a second planar surface and an inclined surface.

[0013] The first planar surface and the second planar surface are parallel and extend in the up-down direction, and the inclined surface connects the first planar surface and the second planar surface.

[0014] Further, an active space is formed between the left roller and the right roller, and the upper roller and the lower roller move up and down in the active space.

[0015] Further, the second planar surface is located below and left of the first planar surface, and the lower roller is active in the space between the second planar surface and the right roller.

[0016] A rolling mill train, the rolling mill train comprising at least two rolling mills, the rolling mill comprising a mill stand and a roller assembly arranged on the mill stand; comprising: an upper roller, a lower roller, a left roller and a right roller, the left roller having a left forming surface, the right roller having a right forming surface, the upper roller having an upper forming surface, the lower roller having a lower forming surface, the left forming surface, the right forming surface and the upper forming surface and the lower forming surface jointly enclosing a forming cavity;

[0017] The upper roller and the lower roller are capable of moving in the up-down direction respectively.

[0018] The left roller and the right roller are capable of moving in the left-right direction respectively.

[0019] Further, at least one of the left forming surface and the right forming surface is a non-planar surface.

[0020] Further, the left forming surface is a non-planar surface, and the left forming surface comprises a first planar surface, a second planar surface and an inclined surface.

[0021] The first planar surface and the second planar surface are parallel and extend in the up-down direction, and the inclined surface connects the first planar surface and the second planar surface.

[0022] Further, an active space is formed between the left roll and the right roll, and the upper roll and the lower roll move up and down in the active space.

[0023] Further, the second plane is located below and left of the first plane, and the lower roll moves in the space between the second plane and the right roll.

[0024] Further, the rolling mills are arranged in sequence on a rolling production line.

[0025] The distance between the left forming surface and the right forming surface in the roll assembly of each rolling mill is different, and one rolling mill is selected to work when rolling.

[0026] Further, the number of the rolling mills in the rolling mill set is not more than five.

[0027] Compared with the closest prior art, the technical scheme provided by the present application has at least the following excellent effects:

[0028] 1) It can be applied to profiled steel with similar shapes but different sizes, and when the cavity wall of the cavity is worn, it can be compensated online without stopping production and disassembling the rolls, ensuring the production efficiency and saving the purchase cost of the rolls.

[0029] 2) At least one of the left forming surface and the right forming surface is a non-plane, which can better adapt to the rolling of profiled steel.

[0030] 3) It can adapt to the rolling of forklift beam profiled steel.

[0031] 4) When the inclined surface is worn, it can also be adjusted online.

[0032] 5) The supporting force of the profiled steel is dispersed to the lower forming surface with a larger area, reducing the wear rate of the lower forming surface.

[0033] 6) When rolling profiled steel with different shapes, the rolling mill needs to be switched instead of the rolling mill production line, which occupies a small area, has a fast switching speed and high production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a structural diagram of forklift beam profiled steel;

[0035] Figure 2 It is a structural diagram of the roll assembly of the rolling mill set in the prior art;

[0036] Figure 3 It is a structural diagram of the roll assembly in the specific embodiment of the rolling mill set of the present application.

[0037] In the figure: 1, right-angled trapezoidal part; 2, rectangular part; 3, upper rolling roller; 4, lower rolling roller; 5, upper rolling roller; 51, upper forming surface; 6, lower rolling roller; 61, lower forming surface; 7, left forming surface; 71, first plane; 72, second plane; 73, inclined surface; 8, right rolling roller; 81, right forming surface; 9, left rolling roller. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0039] The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0040] Specific embodiments of the rolling mill train of the present application: the rolling mill train is used for rolling special-shaped steel and includes at least two rolling mills. The number of rolling mills can be adjusted according to the types and specifications of special-shaped steel that needs to be rolled by the rolling production line. It is preferable that each group of rolling mill trains is provided with three to five rolling mills. The distance between the left forming surface 7 and the right forming surface 81 in the roller assembly of each rolling mill is different, and one of the rolling mills is selected to be put into rolling work when rolling steel.

[0041] The rolling mill includes a rack and a roller assembly (hereinafter referred to as a roller assembly) for rolling special-shaped steel provided on the rack. The roller assembly includes an upper rolling roller 5, a lower rolling roller 6, a left rolling roller 9 and a right rolling roller 8. The left rolling roller 9 has a left forming surface 7, the right rolling roller 8 has a right forming surface 81, the upper rolling roller 5 has an upper forming surface 51, and the lower rolling roller 6 has a lower forming surface 61. The left forming surface 7, the right forming surface 81 and the upper forming surface 51 and the lower forming surface 61 together enclose a forming cavity. The upper rolling roller 5 and the lower rolling roller 6 can move in the upward and downward directions, respectively, and the left rolling roller 9 and the right rolling roller 8 can move in the left and right directions, respectively. According to the shape of the target special-shaped steel, a roller assembly with different forming surfaces is selected, and the forming cavities enclosed by different roller assemblies are different, i.e., the forming surface shapes of the upper rolling roller 5, the lower rolling roller 6, the left rolling roller 9 and the right rolling roller 8 are different. The more the shapes of special-shaped steel, the more sets of roller assemblies there are. The present application cannot be exemplified one by one, and the rolling steel assembly for rolling a forklift beam type steel is taken as an example for description.

[0042] As Figure 3As shown, the active space is formed between the left roll 9 and the right roll 8, and the upper roll 5 and the lower roll 6 move up and down in the active space. The left forming surface 7 is non-planar, and the left forming surface 7 includes a first plane 71, a second plane 72, and an inclined surface 73; the first plane 71 and the second plane 72 are parallel and extend in the up-down direction, and the inclined surface 73 connects the first plane 71 and the second plane 72. The second plane 72 is located below and left of the first plane 71, and the lower roll 6 moves in the space between the second plane 72 and the right roll 8, that is, the cavity wall of the cavity has a rolling groove, and the shape of the rolling groove is a right-angled trapezoid formed by the inclined surface 73, a part of the second plane 72, and a part of the lower forming surface 61.

[0043] The cross-sectional shape of the cavity corresponds to the cross-sectional shape of the forklift beam profile steel, and includes a right-angled trapezoidal region and a rectangular region, and the boundary of the right-angled trapezoidal region is defined by a part of the second plane 72, the inclined surface 73, and a part of the lower forming surface 61. The boundary of the rectangular region is defined by the upper forming surface 51, a part of the lower forming surface 61, the right forming surface 81, and a part of the first plane 71.

[0044] When the roll assembly is worn, it can be compensated for online, specifically:

[0045] If the upper forming surface 51 is worn by 1mm, causing the upper forming surface 51 to move up by 1mm, the thickness B of the finished product rolled out will be 1mm thicker than the standard, at which time it is only necessary to move the upper roll 5 down by 1mm to compensate for the 1mm wear of the upper forming surface 51, control the thickness B of the rectangular portion 2 of the forklift beam profile steel to return to the standard size, so that it is not necessary to stop rolling, disassemble the roll assembly for cavity repair, but the roll assembly can be adjusted online, without affecting the subsequent continuous rolling. When the cavity wear causes the rolled piece size to exceed the standard again, the position of the upper roll 5 can be adjusted again to compensate for the wear.

[0046] If the lower forming surface 61 is worn by 1mm, causing the lower forming surface 61 to move down by 1mm, the thickness B and B1 of the finished product rolled out will be 1mm thicker than the standard, at which time it is only necessary to move the lower horizontal roll 1 up by 1mm to compensate for the 1mm wear of the lower forming surface 61, control the thickness B of the rectangular portion 2 of the forklift beam profile steel and the B1 of the right-angled trapezoidal portion 1 to return to the standard size, so that it is not necessary to stop rolling, disassemble the roll for cavity repair, but the roll assembly can be adjusted online, without affecting the subsequent continuous rolling. When the cavity wear causes the rolled piece size to exceed the standard again, the position of the lower horizontal roll can be adjusted again to compensate for the wear.

[0047] If the right forming surface 81 is worn by 1mm, the finished product width H will be 1mm larger than the standard, at which time it is only necessary to move the right roll 8 to the left by 1mm (or the left roll 9 to the right by 1mm) to compensate for the 1mm wear of the right roll 8, control the width H of the rectangular portion 2 of the forklift beam profile steel to the standard size again, so that it is not necessary to stop rolling, disassemble the roll for cavity repair, but can adjust the roll assembly online, without affecting the subsequent continuous rolling, when the cavity wear causes the rolling piece size to exceed the standard again, the position of the right roll 8 or the left roll 9 can be adjusted again to compensate for the wear.

[0048] If the first plane 71, the second plane 72 and the inclined plane 73 are all worn by 1mm, the finished product width H will be 1mm larger than the standard, at which time it is only necessary to move the left roll 9 to the right by 1mm (or move the right roll 8 to the left by 1mm) to compensate for the 1mm wear of the first plane 71, the second plane 72 and the inclined plane 73, control the width H of the rectangular portion 2 of the forklift beam profile steel to the standard size again, so that it is not necessary to stop rolling, disassemble the roll for cavity repair, but can adjust the roll assembly online, without affecting the subsequent continuous rolling, when the cavity wear causes the rolling piece size to exceed the standard again, the position of the left roll 9 or the right roll 8 can be adjusted again to compensate for the wear.

[0049] If the inclined plane 73 is worn by 1mm, the finished product thickness B1 will be 1mm larger than the standard, at which time it is only necessary to move the upper roll 5 and the lower roll 6 upward by 1mm simultaneously to compensate for the 1mm wear of the inclined plane 73. Control the thickness B1 of the right angle trapezoidal portion 1 of the forklift beam profile steel to the standard size again, so that it is not necessary to stop rolling, disassemble the roll for cavity repair, but can adjust the roll assembly online, without affecting the subsequent continuous rolling, when the cavity wear causes the rolling piece B1 size to exceed the standard again, the upper roll 5 and the lower roll 6 can be adjusted again to compensate for the wear of the inclined plane 73.

[0050] At the same time, when the size of the right angle trapezoidal region needs to be rolled, and the width H and the thickness B of the rectangular region of the forklift beam profile steel are different, the rolling production can be realized by replacing other rolling mills (the upper forming surface 51 and the lower forming surface 61 of the roll assembly of the replaced rolling mill match the width H of the target forklift beam profile steel) in the rolling mill train, which is simple in structure and low in cost.

[0051] When rolling several forklift beam profile steels with similar sizes, the positions of the upper roller 5, the lower roller 6, the left roller 9 and the right roller 8 can be controlled to adjust the size of the corresponding part of the cavity, so as to adapt to the size of each part of the target forklift beam profile steel. The downward movement of the upper roller 5, the upward movement of the lower roller 6, or the simultaneous movement of the two actions (the adjustment range is larger when the two actions are performed simultaneously) can reduce the thickness B of the rectangular area. The upward movement of the upper roller 5, the downward movement of the lower roller 6, or the simultaneous movement of the two actions (the adjustment range is larger when the two actions are performed simultaneously) can increase the thickness B of the rectangular area. The upward movement of the lower roller 6 not only adjusts the thickness B of the rectangular area, but also adjusts the thickness B1 of the right-angle trapezoidal area.

[0052] The rightward movement of the left roller 9, the leftward movement of the right roller 8, or the simultaneous movement of the two actions can reduce the width H of the rectangular area. The leftward movement of the left roller 9, the rightward movement of the right roller 8, or the simultaneous movement of the two actions can increase the width of the rectangular area. The simultaneous upward movement of the upper roller 5 and the lower roller 6 by the same stroke can reduce the thickness B1 of the right-angle trapezoidal area without changing the thickness B of the rectangular area. The simultaneous downward movement of the upper roller 5 and the lower roller 6 by the same stroke can increase the thickness B1 of the right-angle trapezoidal area without changing the thickness B of the rectangular area.

[0053] The specific embodiments of the roller assembly for rolling profiled steel of the present application are the same as the structure of the roller assembly in the specific embodiments of the above roller set, and will not be repeated here.

[0054] In summary, the roller assembly and the rolling mill frame for rolling profiled steel adopted by the present application have the following technical effects compared with the prior art:

[0055] 1) It can be applied to profiled steels with similar shapes but different sizes, and when the cavity wall of the cavity is worn, it can be compensated online without stopping production and disassembling the rollers, ensuring production efficiency and saving the purchase cost of the rollers.

[0056] 2) At least one of the left forming surface and the right forming surface is a non-planar surface, which can better adapt to the rolling of profiled steel.

[0057] 3) It can adapt to the rolling of forklift beam profile steel.

[0058] 4) It can also be adjusted online when the inclined surface is worn.

[0059] 5) The supporting force on the profiled steel is dispersed to the larger lower forming surface, reducing the wear rate of the lower forming surface.

[0060] 6) When rolling profiled steels of different shapes, the rolling mill needs to be switched instead of the rolling mill production line, which occupies a small area, has a fast switching speed and high production efficiency.

[0061] The above merely preferred embodiments of the present application are not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are within the protection scope of the claims of the present application.

Claims

1. A roll assembly for rolling irregularly shaped steel, characterized in that, include: The upper roll, lower roll, left roll, and right roll are provided. The left roll has a left forming surface, the right roll has a right forming surface, the upper roll has an upper forming surface, and the lower roll has a lower forming surface. The left forming surface, the right forming surface, the upper forming surface, and the lower forming surface together surround the forming cavity. The upper roll and the lower roll can move in the vertical direction, respectively; The left roll and the right roll can move in the left and right directions respectively; At least one of the left molding surface and the right molding surface is a non-planar surface; The left forming surface is non-planar, and includes a first plane, a second plane, and an inclined surface; The first plane and the second plane are parallel and extend in the vertical direction, and the inclined plane connects the first plane and the second plane; The cross-section of the cavity includes a right-angled trapezoidal region and a rectangular region. The boundary of the right-angled trapezoidal region is defined by the second plane, the inclined surface, and a portion of the lower molding surface. The boundary of the rectangular region is defined by the upper molding surface, a portion of the lower molding surface, the right molding surface, and a portion of the first plane. The thickness of the rectangular region can be reduced by the downward movement of the upper roller, the upward movement of the lower roller, or both movements simultaneously. The thickness of the rectangular region can be increased by the upward movement of the upper roller, the downward movement of the lower roller, or both movements simultaneously. The upward and downward movement of the lower roller not only adjusts the thickness of the rectangular region but also adjusts the thickness of the right-angled trapezoidal region. Moving the left roll to the right, moving the right roll to the left, or performing both actions simultaneously can reduce the width of the rectangular area; moving the left roll to the left, moving the right roll to the right, or performing both actions simultaneously can increase the width of the rectangular area; moving the upper roll and the lower roll upwards simultaneously by the same stroke can reduce the thickness of the right-angled trapezoidal area without changing the thickness of the rectangular area; moving the upper roll and the lower roll downwards simultaneously by the same stroke can increase the thickness of the right-angled trapezoidal area without changing the thickness of the rectangular area. If the inclined surface wears, the upper roll and the lower roll move upward simultaneously to compensate for the wear.

2. The roll assembly for rolling profiled steel according to claim 1, characterized in that, An active space is formed between the left roll and the right roll, and the upper roll and the lower roll move up and down in the active space.

3. The roll assembly for rolling profiled steel according to claim 2, characterized in that, The second plane is located to the lower left of the first plane, and the lower roll moves in the space between the second plane and the right roll.

4. A rolling mill unit, characterized in that, The rolling mill unit includes at least two rolling mills, each rolling mill including a frame and a roll assembly mounted on the frame; the roll assembly is a roll assembly for rolling profiled steel as described in any one of claims 1 to 3.

5. The rolling mill unit according to claim 4, characterized in that, The rolling mills are arranged sequentially on the rolling production line; The distance between the left forming surface and the right forming surface in the roll assembly of each of the rolling mills is different, and one of the rolling mills is selected to be put into rolling operation during steel rolling.

6. The rolling mill unit according to claim 4, characterized in that, The number of rolling mills in the rolling mill unit shall not exceed five.

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