Roller assembly and rolling mill for rolling double-tooth track steel

Abstract

The present invention provides a roller assembly and a rolling mill for rolling double-toothed track steel, the roller assembly for rolling double-toothed track 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, 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 together form a rolling channel; the upper roller and the lower roller can move in the up and down directions respectively; the left roller and the right roller can move in the left and right directions respectively. It can be applied to double-toothed track steels with similar shapes but different sizes, and when the cavity wall of the rolling channel is worn, it can be compensated online without stopping production and disassembling the rollers, thereby ensuring production efficiency and saving the purchase cost of the rollers.

Description

Technical Field

[0001] The invention belongs to the technical field of hot-rolled steel sections, and in particular relates to a roller assembly and a rolling mill for rolling double-tooth track steel. Background Art

[0002] At present, the rolling process commonly used for special-shaped steel is: using rectangular billets or square billets through multiple box holes, cutting holes, control holes and finished holes, and finally rolling them into special-shaped steel of the target shape. Track steel is a kind of special-shaped steel. Track steel is often used to make crawler chains for engineering machinery such as excavators, bulldozers, crawler cranes, and pavers. Track steel is divided into single-tooth track steel, double-tooth track steel and three-tooth track steel according to its shape. Relatively speaking, double-tooth track steel has higher teeth, longer service life, better structural form and grip performance.

[0003] Track steel is generally produced by hot rolling. The common process for hot-rolled track steel is rough rolling mill blanking + finishing rolling of finishing mill. The rectangular billet is finally rolled into track steel through rolling of multiple rolling mills. The roller assembly of the finishing mill is usually a two-roller assembly. The double-tooth track steel has a higher grouser. When the two-roller assembly is used for rolling, the hole groove of the lower roller is deeper. The angular velocity of the lower roller is the same at all places, but the distance between the notch and the bottom of the groove of the hole groove and the axis of rotation of the roller is quite different, so the linear velocity at the notch is relatively large, and the friction stroke between the roller at the notch and the grouser is relatively long, which easily leads to excessive wear of the roller at the notch. In addition, the linear velocity of the roller at the notch is relatively fast. The worn roller is likely to cause surface quality defects such as drawing and rubbing marks at the root of the grouser, and the yield rate is low. In order to reduce rubbing marks and drawing, it is often necessary to stop the machine and replace the roller during the rolling process, which increases costs and affects production efficiency.

[0004] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems of low quality of rolled products and short life of the roller assembly used for rolling double-tooth track steel in the above-mentioned prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a roller assembly for rolling double-tooth track steel, comprising:

[0007] An upper roller, a lower roller, a left roller and a right roller, wherein 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, the upper forming surface and the lower forming surface together form a rolling channel to roll the workpiece to be rolled;

[0008] The upper roller can move in the up and down directions;

[0009] The left roller and the right roller can move in left and right directions respectively.

[0010] Furthermore, the lower roller can move in the up and down directions.

[0011] Furthermore, the left roller also includes a left transverse surface, and the lower roller also includes a first lower transverse surface. When the lower roller is at the upper end of the moving stroke, the first lower transverse surface supports the left transverse surface.

[0012] Furthermore, the right roller also includes a right transverse surface, and the lower roller also includes a second lower transverse surface. When the lower roller is at the upper end of the moving stroke, the second lower transverse surface supports the right transverse surface.

[0013] Furthermore, the rolling channel includes a first grouser forming portion, a second grouser forming portion, a long grouser forming portion, a web forming portion and a short grouser forming portion.

[0014] Furthermore, the first grouser forming portion is surrounded by a left forming surface and a lower forming surface.

[0015] Furthermore, the second grouser forming portion is surrounded by a right forming surface and a lower forming surface.

[0016] Furthermore, the long tooth forming portion is surrounded by an upper forming surface and a left forming surface.

[0017] Furthermore, the short tooth forming portion is surrounded by an upper forming surface and a right forming surface.

[0018] The rolling mill comprises a frame and a roller assembly arranged on the frame, wherein the roller assembly comprises:

[0019] An upper roller, a lower roller, a left roller and a right roller, wherein 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, the upper forming surface and the lower forming surface together form a rolling channel to roll the workpiece to be rolled;

[0020] The upper roller can move in the up and down directions;

[0021] The left roller and the right roller can move in left and right directions respectively.

[0022] Furthermore, the lower roller can move in the up and down directions.

[0023] Furthermore, the left roller also includes a left transverse surface, and the lower roller also includes a first lower transverse surface. When the lower roller is at the upper end of the moving stroke, the first lower transverse surface supports the left transverse surface.

[0024] Furthermore, the right roller also includes a right transverse surface, and the lower roller also includes a second lower transverse surface. When the lower roller is at the upper end of the moving stroke, the second lower transverse surface supports the right transverse surface.

[0025] Furthermore, the rolling channel includes a first grouser forming portion, a second grouser forming portion, a long grouser forming portion, a web forming portion and a short grouser forming portion.

[0026] Furthermore, the first grouser forming portion is surrounded by a left forming surface and a lower forming surface.

[0027] Furthermore, the second grouser forming portion is surrounded by a right forming surface and a lower forming surface.

[0028] Furthermore, the long tooth forming portion is surrounded by an upper forming surface and a left forming surface.

[0029] Furthermore, the short tooth forming portion is surrounded by an upper forming surface and a right forming surface.

[0030] Compared with the closest prior art, the technical solution provided by the present invention has at least the following excellent effects:

[0031] 1) The double-tooth track steel is processed by using left and right rollers that can move left and right, which is convenient for adjusting the thickness of the grouser and reducing the situation where the roots of the two grousers wear faster on the forming surface of the rollers due to the deep forming part of the grouser, thereby reducing the rubbing marks and wire drawing of the double-tooth track steel, improving the yield rate and improving production efficiency.

[0032] 2) It can be applied to double-tooth track steels with similar shapes but different web thickness, tooth thickness, and long and short tooth lengths. When the cavity wall of the rolling channel of the double-tooth track steel is worn, it can be compensated online without stopping production and disassembling the rollers, thereby ensuring production efficiency and saving the cost of purchasing rollers.

[0033] 3) The left and right rolls can be supported by the lower roll to prevent the left and right rolls from moving downward during the rolling process, thereby ensuring the rolling quality.

[0034] 3) The first grouser forming part is surrounded by a left forming surface and a lower forming surface. The left forming surface is less worn, which is beneficial to extending the life of the roller assembly.

[0035] 4) The second grouser forming part is surrounded by the right forming surface and the lower forming surface. The right forming surface is less worn, which is beneficial to extending the life of the roller assembly.

[0036] 5) The long tooth forming part is surrounded by the upper forming surface and the left forming surface, and the short tooth forming part is surrounded by the upper forming surface and the right forming surface, which facilitates the control of the shape of the forming part. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1It is a schematic structural diagram of a roller assembly in a specific embodiment of a rolling mill of the present invention.

[0038] In the figure: 1, upper roller; 2, lower roller; 3, left roller; 4, right roller; 5, web forming part; 6, first grouser forming part; 7, second grouser forming part; 8, long tooth forming part; 9, short tooth forming part; 10, first plane; 11, second plane; 12, third plane; 13, fourth plane; 14, second plane; 15, first inclined plane; 16, second inclined plane; 17, left first plane; 18, left first inclined plane; 19, left first curved surface; 20, right first plane; 21, right first inclined plane; 22, right first curved surface; 23, first curved surface; 24, second curved surface; 25, sixth plane; DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0041] The specific embodiment of the rolling mill of the present invention: The rolling mill includes a frame and a roller assembly. The difference between the present application and the rolling mill in the prior art mainly lies in the roller assembly, such as Figure 1 As shown, the roller assembly of the present application is a roller assembly for rolling double-tooth track steel, including an upper roller 1, a lower roller 2, a left roller 3 and a right roller 4. The upper roller 1 and the lower roller 2 are placed opposite to each other in the upper and lower directions, and the left roller 3 and the right roller 4 are placed opposite to each other in the left and right directions. The upper roller 1 and the lower roller 2 can move in the upper and lower directions respectively; the left roller 3 and the right roller 4 can move in the left and right directions respectively.

[0042] The upper roller 1 has an upper forming surface, the lower roller 2 has a lower forming surface, the left roller 3 has a left forming surface, and the right roller 4 has a right forming surface. The left forming surface, the right forming surface, the upper forming surface and the lower forming surface together form a rolling channel for the double-tooth track steel to roll the workpiece to be rolled.

[0043] The upper roller 1 is provided with a first curved surface 23, a second curved surface 24 and a sixth flat surface 25, and the first curved surface 23, the second curved surface 24 and the sixth flat surface 25 constitute an upper forming surface.

[0044] The lower roller 2 is provided with a first plane 10 , a fifth plane 14 and a lower forming surface, and the lower forming surface includes a second plane 11 , a third plane 12 , a fourth plane 13 , a first inclined surface 15 and a second inclined surface 16 .

[0045] The left rolling roller 3 is provided with a left flat surface 17, a left inclined surface 18 and a left curved surface 19, and the left inclined surface 18 and the left curved surface 19 constitute a left forming surface.

[0046] The right roller 4 is provided with a right plane 20, a right inclined surface 21 and a right curved surface 22, and the right inclined surface 21 and the right curved surface 22 constitute a right forming surface. The rolling channel includes a first grouser forming part 6, a second grouser forming part 7, a long tooth forming part 8, a short tooth forming part 9 and a web forming part 5.

[0047] The first grouser forming portion 6 is surrounded by a left forming surface and a lower forming surface, specifically, by a second plane 11 , a first inclined surface 15 and a left first inclined surface 18 .

[0048] The second grouser forming portion 7 is surrounded by a right forming surface and a lower forming surface, specifically, by a fourth plane 13 , a second inclined surface 16 and a right first inclined surface 21 .

[0049] The long tooth forming portion 8 is surrounded by an upper forming surface and a left forming surface, specifically, by a first curved surface 23 and a left first curved surface 19 .

[0050] The short tooth forming portion 9 is surrounded by an upper forming surface and a right forming surface, specifically, by a second curved surface 24 and a right first curved surface 22 .

[0051] There is a gap between the lower roller 2 and the left roller 3 in the horizontal direction, there is a gap between the lower roller 2 and the right roller 4 in the horizontal direction, there is a gap between the upper roller 1 and the left roller 3 in the horizontal direction, and there is a gap between the upper roller 1 and the right roller 3 in the horizontal direction. This arrangement can reduce the wear of the roller assembly and reduce the resistance during rolling.

[0052] When the lower roller 2 is at the upper end of the moving stroke, the first plane 10 supports the left plane 17 to reduce the downward movement of the left roller 3 caused by the force during the rolling process, and the fifth plane 14 supports the right plane 20 to reduce the downward movement of the right roller 4 caused by the force during the rolling process. The first plane 10 constitutes the first lower transverse surface, the fifth plane 14 constitutes the second lower transverse surface, the left plane 17 constitutes the left transverse surface, and the right plane 20 constitutes the right transverse surface.

[0053] The sizes of the long teeth, short teeth, web, first grouser and second grouser of the double-tooth track steel are controlled by moving the upper roller 1, the lower roller 2, the left roller 3 and the right roller 4: the lower roller 2 is kept stationary, and the upper roller 1 moves upward to increase the thickness of the web, and moves downward to reduce the thickness of the web. The left roller 3 moves to the left to increase the thickness of the first grouser and the length of the long teeth, and moves to the right to reduce the thickness of the first grouser and the length of the long teeth. The right roller 4 moves to the right to increase the thickness of the second grouser and the length of the short teeth, and moves to the left to reduce the thickness of the second grouser and the length of the short teeth.

[0054] The specific embodiment of the roller assembly for rolling double-tooth track steel of the present invention has the same structure as the roller assembly in the specific embodiment of the above-mentioned rolling mill, and will not be described in detail.

[0055] In summary, the roller assembly and rolling mill for rolling double-tooth track steel used in the present invention have the following technical effects compared with the prior art:

[0056] 1) The double-tooth track steel is processed by using left and right rollers that can move left and right, which is convenient for adjusting the thickness of the grouser and reducing the situation where the roots of the two grousers wear faster on the forming surface of the rollers due to the deep forming part of the grouser, thereby reducing the rubbing marks and wire drawing of the double-tooth track steel, improving the yield rate and improving production efficiency.

[0057] 2) It can be applied to double-tooth track steels with similar shapes but different web thickness, tooth thickness, and long and short tooth lengths. When the cavity wall of the rolling channel of the double-tooth track steel is worn, it can be compensated online without stopping production and disassembling the rollers, thereby ensuring production efficiency and saving the cost of purchasing rollers.

[0058] 3) The left and right rolls can be supported by the lower roll to prevent the left and right rolls from moving downward during the rolling process, thereby ensuring the rolling quality.

[0059] 3) The first grouser forming part is surrounded by a left forming surface and a lower forming surface. The left forming surface is less worn, which is beneficial to extending the life of the roller assembly.

[0060] 4) The second grouser forming part is surrounded by the right forming surface and the lower forming surface. The right forming surface is less worn, which is beneficial to extending the life of the roller assembly.

[0061] 5) The long tooth forming part is surrounded by the upper forming surface and the left forming surface, and the short tooth forming part is surrounded by the upper forming surface and the right forming surface, which facilitates the control of the shape of the forming part.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A roller assembly for rolling double-tooth track steel, characterized in that: include: An upper roller, a lower roller, a left roller and a right roller, wherein 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, the upper forming surface and the lower forming surface together form a rolling channel to roll the workpiece to be rolled; The upper roller can move in the up and down directions; The left roller and the right roller can move in left and right directions respectively; There is a gap between the lower roller and the left roller in the horizontal direction, there is a gap between the lower roller and the right roller in the horizontal direction, there is a gap between the upper roller and the left roller in the horizontal direction, and there is a gap between the upper roller and the right roller in the horizontal direction.

2. The roller assembly for rolling double-tooth track steel according to claim 1, characterized in that: The lower roller is movable in an up-and-down direction.

3. The roller assembly for rolling double-tooth track steel according to claim 2, characterized in that: The left roller further includes a left transverse surface, and the lower roller further includes a first lower transverse surface. When the lower roller is at the upper end of the moving stroke, the first lower transverse surface supports the left transverse surface.

4. The roller assembly for rolling double-tooth track steel according to claim 2, characterized in that: The right roller also includes a right transverse surface, and the lower roller also includes a second lower transverse surface. When the lower roller is at the upper end of the moving stroke, the second lower transverse surface supports the right transverse surface.

5. The roller assembly for rolling double-tooth track steel according to claim 1, characterized in that: The rolling channel includes a first grouser forming part, a second grouser forming part, a long tooth forming part, a web forming part and a short tooth forming part.

6. The roller assembly for rolling double-tooth track steel according to claim 5, characterized in that: The first grouser forming portion is surrounded by a left forming surface and a lower forming surface.

7. The roller assembly for rolling double-tooth track steel according to claim 5, characterized in that: The second grouser forming portion is surrounded by a right forming surface and a lower forming surface.

8. The roller assembly for rolling double-tooth track steel according to claim 5, characterized in that: The long tooth forming part is surrounded by an upper forming surface and a left forming surface.

9. The roller assembly for rolling double-tooth track steel according to claim 5, characterized in that: The short tooth forming part is surrounded by an upper forming surface and a right forming surface.

10. A rolling mill, characterized in that It comprises a frame and a roller assembly arranged on the frame, and the roller assembly is a roller assembly for rolling double-tooth track steel as described in any one of claims 1 to 9.

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