Axial locking device of rolling mill

Abstract

The utility model provides an axial locking device of a rolling mill, and belongs to the technical field of steel rolling equipment structures. According to the device, under three working states of the rolling mill, the pressing plate, the radial locking part and the axial locking part correspond to different matching relations, and the problems that in the prior art, a locking device only has a locking state and an unlocking state, so that an operator is difficult to adjust a roller, other auxiliary devices are adopted to adjust a roller gap, and the roller gap cannot be adjusted easily are solved. And the operation difficulty and the workload of operators are increased. The axial locking device of the rolling mill is used for preventing the axial movement of a roll system in the production process of the rolling mill, and comprises a pressing plate, a locking mechanism, a locking mechanism, a locking mechanism and a locking mechanism, and an axial pressing surface is arranged on the pressing plate and corresponds to the axial end surface of the roll system; the radial locking part drives the pressing plate to move in the radial direction of the roller system; and when the radial locking part drives the pressing plate to move till the axial pressing face is opposite to the axial end face, the axial locking part drives the pressing plate to move in the axial direction of the roller system.

Description

Technical Field

[0001] This utility model belongs to the technical field of steel rolling equipment structure, and in particular relates to an axial locking device for a rolling mill. Background Technology

[0002] Rolling mills are core equipment in the metal processing industry, used to roll metal billets (such as steel ingots, steel billets, aluminum plates, etc.) into plates, profiles, and pipes of specific shapes and thicknesses through the rotation and pressure of rolls. Because rolling mills are the final forming tools for steel and other products, their performance directly affects the quality of the rolled products and production efficiency.

[0003] During the rolling process, various factors such as uneven rolling force, thermal expansion effect, mechanical vibration or impact may cause axial movement of the rolls. The axial position of the rolls directly affects the uniformity and parallelism of the roll gap. Therefore, if the rolls move axially, it will lead to problems such as uneven thickness of the rolled product, cracks or wavy defects on the edge of the rolled workpiece. In severe cases, it may even cause equipment safety problems such as wear of bearing seats, damage to oil film bearings, or uneven stress on the rolling mill stand.

[0004] To address the aforementioned technical problems, engineers have designed and manufactured corresponding axial locking devices for rolling mills. For example, Chinese invention patent application CN106734230A describes an axial locking device for rolling mills and rolls. This device's support base engages with a locking cover via a wedge, locking the cover while simultaneously eliminating axial clearance and improving the locking accuracy and stability of axial adjustment. Chinese utility model patent CN2024523771U describes a locking device for cross-roll mill rolls, where a bearing end cap, thrust seat, and connecting rod form a parallelogram, locking the rolls' axial movement while allowing the cross angle between the upper and lower rolls to change. Furthermore, Chinese utility model patent CN214516758U describes a locking device for preventing axial displacement of rolls in a Danieli rolling mill. All these examples illustrate the mechanical structure of axial locking devices for rolling mills.

[0005] Existing axial locking devices for rolling mills have only two states: locked and unlocked. In the locked state, operators perform rolling operations; in the unlocked state, operators replace the entire roll system. However, when operators need to adjust the roll gap, the structure of the aforementioned locking device makes it difficult for operators to adjust the rolls in the locked state. In the unlocked state, operators find it difficult to accurately control the roll adjustment, resulting in a large error in the adjusted roll gap. Using other auxiliary devices to adjust the roll gap further increases the operational difficulty and the workload of the operators. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an axial locking device for a rolling mill, which solves the problem that the locking device in the prior art only has a locked state and an unlocked state. When the operator needs to adjust the roll gap, the locking device is in the locked state, making it difficult for the operator to adjust the roll. When the locking device is in the unlocked state, it is difficult for the operator to accurately control the adjustment of the roll, resulting in a large error in the adjusted roll gap. Using other auxiliary devices to adjust the roll gap increases the difficulty of operation and the workload of the operator.

[0007] To achieve the above and other related objectives, this utility model provides an axial locking device for a rolling mill to prevent axial movement of the roll system during rolling mill production, comprising:

[0008] A pressure plate, wherein the pressure plate is provided with an axial pressing surface, which corresponds to the axial end face of the roller system;

[0009] A radial locking part drives the pressure plate to move radially along the roller system;

[0010] The axial locking part drives the pressure plate to move axially along the roller system when the radial locking part drives the pressure plate to move until the axial pressing surface and the axial end face are opposite.

[0011] Optionally, the axial locking part includes:

[0012] A cylinder, comprising a cylinder body mounted on the frame of the rolling mill and a piston rod mounted in the cylinder body;

[0013] The connecting rod is connected at its upper end to the outer end of the piston rod;

[0014] The wrench has its outer end hinged to the connecting rod.

[0015] The nut is fixedly fitted into the inner end of the wrench;

[0016] The screw is screwed into the nut, the pressure plate and the frame in sequence from bottom to top, and fixed in the frame.

[0017] Optionally, the axial locking part further includes a bushing, which is fixedly embedded in the pressure plate, and the portion of the screw screwed into the pressure plate is located in the bushing; the lower end of the bushing extends outward from the lower surface of the pressure plate and extends a pad radially outward, the pad being located between the lower surface of the pressure plate and the upper surface of the nut.

[0018] Optionally, there are two wrenches, with the outer ends of the two wrenches respectively hinged to the middle and lower parts of the connecting rod.

[0019] Optionally, the radial locking part includes:

[0020] A lead screw nut sleeve is fixedly installed on the machine frame;

[0021] The lead screw meshes in the lead screw nut sleeve, and its inner end is fixedly connected to the pressure plate.

[0022] The handle is fixedly installed on the outer end of the lead screw.

[0023] Optionally, both the axial pressing surface and the axial end face are inclined surfaces.

[0024] Optionally, there are two sets, located on opposite sides of the roller system.

[0025] As described above, the axial locking device for a rolling mill according to this utility model has at least the following beneficial effects:

[0026] The axial locking device of this rolling mill features an axial pressing surface on the pressure plate, corresponding to the axial end face of the roll system. The radial locking part drives the pressure plate to move until the axial pressing surface and the axial end face are aligned. This design allows the axial locking part to move the pressure plate axially along the roll system. During rolling, the radial locking part drives the pressure plate to move until the axial pressing surface and the axial end face are aligned, then moves the pressure plate axially along the roll system until they abut, thus fixing the roll system axially and preventing axial movement of the rolls and roll bearing housings. When adjusting the roll gap, the radial locking part still drives the pressure plate to move until the axial pressing surface and the axial end face are aligned, but the axial locking part then drives the pressure plate to move until the axial pressing surface and the axial end face are separated. This allows the operator to... The roll gap is adjusted while the pressure plate remains radially opposed to the roll system, preventing significant movement of the rolls and roll bearing housings without the aid of other auxiliary tools. When the roll system needs to be replaced, the axial locking part drives the pressure plate to move until the axial pressing surface and the axial end face are separated, and the radial locking part drives the pressure plate to move until the axial pressing surface and the axial end face are no longer opposite. This solves the problems of existing locking devices that only have locked and unlocked states. When the operator needs to adjust the roll gap, the locking device is in the locked state, making it difficult for the operator to adjust the rolls. When the locking device is in the unlocked state, the operator cannot accurately control the adjustment of the rolls, resulting in a large error in the adjusted roll gap. Using other auxiliary devices to adjust the roll gap increases the difficulty of operation and the workload of the operator. Attached Figure Description

[0027] Figure 1 The diagram shows an axial locking device for a rolling mill according to this utility model during the rolling process.

[0028] Figure 2 The image shown is a cross-sectional view of an axial locking device for a rolling mill according to this utility model.

[0029] Figure 3 The diagram shows an axial locking device for a rolling mill according to this utility model when adjusting the roll gap.

[0030] Figure 4 The diagram shows an axial locking device for a rolling mill according to this invention during roll replacement.

[0031] Component designation explanation

[0032] Pressure plate 1, axial pressing surface 11;

[0033] Radial locking part 2, lead screw nut sleeve 21, lead screw 22, handle 23;

[0034] Axial locking part 3, cylinder 31, connecting rod 32, wrench 33, nut 34, screw 35, bushing 36;

[0035] Roller system 4, axial end face 41;

[0036] Rack 5. Detailed Implementation

[0037] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0038] Please see Figures 1 to 4 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0039] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0040] Please see Figure 1 This utility model provides an axial locking device for a rolling mill to prevent axial movement of the roll system 4 during rolling mill production, comprising:

[0041] like Figure 1 and Figure 2 The pressure plate 1 shown has an axial pressing surface 11, which corresponds to the axial end face 41 of the roller system 4.

[0042] like Figure 1 and Figure 2 The radial locking part 2 shown drives the pressure plate 1 to move radially along the roller system 4.

[0043] like Figure 1 and Figure 2 The axial locking part 3 shown drives the pressure plate 1 to move axially along the roller system 4 when the radial locking part 2 drives the pressure plate 1 to move so that the axial pressing surface 11 and the axial end face 41 are opposite.

[0044] like Figure 1 and Figure 2 As shown, when the rolling mill is rolling steel, the radial locking part 2 drives the pressure plate 1 to move until the axial pressing surface 11 and the axial end face 41 are opposite each other. The axial locking part 3 drives the pressure plate 1 to move along the axial direction of the roll system 4 until the axial pressing surface 11 and the axial end face 41 abut against each other, thereby fixing the roll system 4 along the axial direction and preventing the roll system 4, that is, preventing the rolls and roll bearing seats from moving along the axial direction.

[0045] like Figure 2 and Figure 3 As shown, when it is necessary to adjust the roll gap, the radial locking part 2 still drives the pressure plate 1 to move until the axial pressing surface 11 and the axial end face 41 are opposite each other. However, at this time, the axial locking part 3 drives the pressure plate 1 to move until the axial pressing surface 11 and the axial end face 41 are separated. In this way, the operator can adjust the roll gap. At the same time, because the pressure plate 1 still abuts against the roll system 4 in the radial direction, it can prevent the roll and roll bearing seat from having a large range of movement without the aid of other auxiliary tools.

[0046] like Figure 2 and Figure 4 As shown, when the roller system 4 needs to be replaced, the axial locking part 3 drives the pressure plate 1 to move until the axial pressing surface 11 and the axial end face 41 are separated, and the radial locking part 2 drives the pressure plate 1 to move until the axial pressing surface 11 and the axial end face 41 are no longer opposite.

[0047] In the three different working states of the rolling mill, the pressure plate 1, radial locking part 2, and axial locking part 3 of this locking device have different matching relationships. This solves the problem that the existing locking device only has a locked state and an unlocked state. When the operator needs to adjust the roll gap, the locking device is in the locked state, making it difficult for the operator to adjust the roll. When the locking device is in the unlocked state, the operator cannot accurately control the adjustment of the roll, resulting in a large error in the adjusted roll gap. Using other auxiliary devices to adjust the roll gap increases the difficulty of operation and the workload of the operator.

[0048] In another implementation, please refer to Figure 1 and Figure 2 The axial locking part 3 includes:

[0049] like Figure 1 The cylinder 31 shown includes a cylinder body mounted on the frame 5 of the rolling mill and a piston rod mounted in the cylinder body.

[0050] like Figure 1 and Figure 2 The connecting rod 32 shown is connected at its upper end to the outer end of the piston rod.

[0051] like Figure 1 and Figure 2 The wrench 33 shown has its outer end hinged to the connecting rod 32.

[0052] like Figure 2 The nut 34 shown is fixedly fitted into the inner end of the wrench 33.

[0053] like Figure 2 The screw 35 shown is screwed into the nut 34, the pressure plate 1 and the frame 5 from bottom to top, and fixed in the frame 5.

[0054] The cylinder 31 drives the piston rod to extend downward or retract upward, which in turn moves the connecting rod 32 downward or upward, thereby driving the wrench 33 to rotate, which in turn drives the nut 34 to rotate on the screw 35. The nut 34 presses against or away from the pressure plate 1, so that the axial pressing surface 11 on the pressure plate 1 and the axial end face 41 of the roller system 4 abut or move away. The entire structure is reliable and simple in structure thanks to the connecting rod 32.

[0055] In another implementation, please refer to Figure 2 The axial locking part 3 also includes a bushing 36, which is fixedly embedded in the pressure plate 1. The portion of the screw 35 screwed into the pressure plate 1 is located in the bushing 36. The lower end of the bushing 36 extends outward from the lower surface of the pressure plate 1 and extends a pad radially outward. The pad is located between the lower surface of the pressure plate 1 and the upper surface of the nut 34. This improves the working reliability of the axial locking part 3.

[0056] In another implementation, please refer to Figure 1 There are two wrenches 33, and the outer ends of the two wrenches 33 are respectively hinged to the middle and lower parts of the connecting rod 32. The quadrilateral connecting rod 32 mechanism, consisting of a connecting rod 32, two wrenches 33 and pressure plate 1, is more reliable in operation than the "I" shaped connecting rod 32 structure.

[0057] In another implementation, please refer to Figure 2 The radial locking part 2 includes:

[0058] like Figure 2 The lead screw nut set 34 21 shown is fixedly installed on the frame 5;

[0059] like Figure 2 The lead screw 22 shown engages in the lead screw nut 34 sleeve 21, and its inner end is fixedly connected to the pressure plate 1;

[0060] like Figure 2 The handle 23 shown is fixedly installed on the outer end of the lead screw 22.

[0061] The operator can rotate the lead screw 22 by turning the handle. With the cooperation of the lead screw nut 34 and the sleeve 21, the rotational motion of the lead screw 22 is converted into linear motion, thereby driving the pressure plate 1 to move radially along the roller system 4, closer to or away from the roller system 4. It is reliable in operation, simple in structure and convenient in operation.

[0062] In another implementation, please refer to Figure 2 Both the axial pressing surface 11 and the axial end face 41 are inclined surfaces. Compared with two flat surfaces, the two inclined surfaces have a self-locking function after they are put together, making the locking device more reliable in the locked state.

[0063] In another implementation, please refer to Figure 1 and Figure 2 There are two sets, located on both sides of the roller system 4, to ensure the stable locking of the roller system 4.

[0064] In summary, this invention addresses the shortcomings of existing technologies by employing different mating relationships between the pressure plate 1, radial locking part 2, and axial locking part 3 in the three operating states of the rolling mill. This solves the problem that existing locking devices only have locked and unlocked states, making it difficult for operators to adjust the roll gap when the device is locked, or difficult to precisely control the roll adjustment when the device is unlocked, leading to significant roll gap errors. Using other auxiliary devices for roll gap adjustment further increases the operational difficulty and workload. Therefore, this invention effectively overcomes the shortcomings of existing technologies and has high industrial application value.

[0065] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An axial locking device of a rolling mill for preventing axial displacement of a roll system during production of the rolling mill, characterized in that, include: A pressure plate, wherein the pressure plate is provided with an axial pressing surface, which corresponds to the axial end face of the roller system; A radial locking part drives the pressure plate to move radially along the roller system; The axial locking part drives the pressure plate to move axially along the roller system when the radial locking part drives the pressure plate to move until the axial pressing surface and the axial end face are opposite.

2. An axial locking device for a rolling mill according to claim 1, characterized in that, The axial locking part includes: A cylinder, comprising a cylinder body mounted on the frame of the rolling mill and a piston rod mounted in the cylinder body; The connecting rod is connected at its upper end to the outer end of the piston rod; The wrench has its outer end hinged to the connecting rod. The nut is fixedly fitted into the inner end of the wrench; The screw is screwed into the nut, the pressure plate and the frame in sequence from bottom to top, and fixed in the frame.

3. The axial locking device for a rolling mill according to claim 2, characterized in that; The axial locking part also includes a bushing, which is fixedly fitted in the pressure plate, and the portion of the screw screwed into the pressure plate is located in the bushing. The lower end of the bushing extends outward from the lower surface of the pressure plate and extends radially outward with a liner, which is located between the lower surface of the pressure plate and the upper surface of the nut.

4. The axial locking device for a rolling mill according to claim 2, characterized in that: There are two wrenches, and the outer ends of the two wrenches are respectively hinged to the middle and lower parts of the connecting rod.

5. An axial locking device for a rolling mill as claimed in claim 2, characterized in that The radial locking part includes: A lead screw nut sleeve is fixedly installed on the machine frame; The lead screw meshes in the lead screw nut sleeve, and its inner end is fixedly connected to the pressure plate. The handle is fixedly installed on the outer end of the lead screw.

6. The axial locking device for a rolling mill according to claim 1, characterized in that: Both the axial pressing surface and the axial end face are inclined surfaces.

7. The axial locking device for a rolling mill according to claim 1, characterized in that: There are two sets, located on both sides of the roller system.

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