Mechanical screw-down synchronizing device of hot continuous rolling roughing mill

Abstract

The invention discloses a mechanical screw-down synchronizing device of a hot continuous rolling roughing mill, which comprises a transmission side screw-down speed reducer, an operation side screw-down speed reducer, a transmission motor, a synchronizing shaft, a WGT10 coupling, a brake and a connecting bolt, and is characterized in that the synchronizing shaft is directly connected with the transmission side screw-down speed reducer and the operation side screw-down speed reducer; and the two sets of WGT10 couplings are respectively connected between the synchronizing shaft and the transmission side screw-down speed reducer and between the synchronizing shaft and the operation side screw-down speed reducer. The device improves positioning precision, avoids defects of rolled pieces, reduces failure rate and maintenance cost, improves yield and product quality, is already applied to 1450mm and 2050mm units, and effectively solves many problems of electromagnetic clutches.

Description

Technical Field

[0001] The invention relates to the technical field of hot continuous rolling plate and strip mills, and in particular to a mechanical pressing synchronization device of a hot continuous rolling roughing mill. Background Art

[0002] In the production process of hot-rolled strip steel, the rough rolling unit is one of the key units of the entire production line. Its main function is to roll the slab with a thickness of 200mm and above into 40mm-60mm strip steel, and then send it to the downstream finishing rolling unit to be rolled into qualified hot-rolled strip steel.

[0003] In the past conventional designs, the mechanical pressing synchronization device of the rough rolling mill of the domestic hot rolling production line was connected by an electromagnetic clutch. The working principle of the electromagnetic clutch is to control the power transmission through electromagnetic force, thereby realizing the connection and separation functions of the pressing transmission mechanism on both sides of the rough rolling mill, and facilitating the constant adjustment of the wear errors of the mechanical pressing devices on both sides of the rolling mill during use, so as to achieve the mechanical pressing positioning accuracy on both sides of the rolling mill and ensure the quality of the rough rolling intermediate billet.

[0004] However, due to the heavy rolling load of the roughing mill and the impact load at the moment of biting the steel will be transmitted to the electromagnetic clutch along with the pressing down screw rod through the pressing down reducer gear mechanism, long-term heavy load impact will cause the electromagnetic coil of the electromagnetic clutch to overheat and affect its performance and life. In actual use, the failure rate is high and the anti-interference ability is relatively weak. When the electromagnetic clutch fails, during the steel biting rolling process of the rolling mill, the mechanical pressure on both sides will cause positioning deviation or self-locking failure due to load changes, resulting in wedge-shaped or skewing of the rolled piece, which brings great difficulty to the stable rolling of the finishing mill in the subsequent process, seriously affecting the yield rate and product quality. Summary of the invention

[0005] According to the above-mentioned technical problem that the electromagnetic coil of the electromagnetic clutch is overheated, has a high failure rate, and has a weak anti-interference ability due to the heavy rolling load and the large instantaneous impact load of biting steel in the rough rolling mill, the long-term effect provides a mechanical pressing synchronization device for a hot rolling rough rolling mill. The present invention adopts a synchronous shaft device directly connected to the pressing reducers on both sides, so that the pressing reducers on both sides of the rolling mill form a rigid connection when running with load, eliminates the mechanical clearance and improves the mechanical pressing positioning accuracy, which can effectively solve the shortcomings of the original design of the electromagnetic clutch with high failure rate, high maintenance cost and complex control process, and effectively prevents the product quality loss and yield loss caused by the failure of the electromagnetic clutch.

[0006] The technical means adopted by the present invention are as follows:

[0007] A mechanical pressing synchronization device for a hot rolling roughing mill, comprising: a driving side pressing reduction gear, an operating side pressing reduction gear, a driving motor, a synchronous shaft, a WGT10 coupling, a brake, and connecting bolts;

[0008] The synchronous shaft is directly connected to the transmission side pressure reducer and the operating side pressure reducer, so that the pressure reducers on both sides of the rolling mill form a rigid connection when running with load;

[0009] The two sets of WGT10 couplings are respectively connected between the synchronous shaft and the transmission side pressure reducer and between the synchronous shaft and the operation side pressure reducer.

[0010] Furthermore, the material of the synchronous shaft is 42CrMo forged steel, and the R corner part needs to be inspected by ultrasonic flaw detection.

[0011] Furthermore, the transmission side reducer and the operation side reducer are symmetrically provided with the brakes.

[0012] Furthermore, the various components are connected by the connecting bolts.

[0013] Furthermore, the transmission motor provides power for the entire device.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The present invention provides a mechanical pressing synchronization device for a hot rolling roughing mill, which adopts a synchronous shaft to be directly connected to the pressing reducers on both sides to form a rigid connection, eliminates the mechanical gap, and improves the mechanical pressing positioning accuracy. Compared with the original electromagnetic clutch connection method, it can more accurately control the pressing amount on both sides of the rolling mill, and effectively avoid the wedge shape or deviation of the rolled piece caused by the failure of the electromagnetic clutch, thereby improving the plate shape quality of the hot-rolled strip steel, and the produced products are more in line with the quality standards.

[0016] 2. The present invention provides a mechanical pressing synchronization device for a hot rolling roughing mill. The electromagnetic clutch of the original design is easily overheated due to the impact of the heavy load of the roughing mill, and the failure rate is high and the anti-interference ability is weak. The device of the present invention adopts a mechanical structure to replace the electromagnetic clutch, avoiding electromagnetic-related failure problems. The structure composed of the synchronization shaft, drum gear coupling and connecting bolts is simple and durable, and can be maintenance-free, which greatly reduces the equipment maintenance cost, reduces the downtime caused by equipment failure, and improves production efficiency.

[0017] 3. The mechanical pressing synchronization device of the hot rolling roughing mill provided by the present invention can accurately control the pressing amount on both sides of the rolling mill, avoid the problems of wedge shape or deviation of the rolled piece, reduce the generation of waste due to rolling defects, and thus improve the yield rate. For users, it means that more qualified products can be produced with the same raw material input, thereby improving the economic benefits.

[0018] 4. The mechanical pressing synchronization device of a hot rolling roughing mill provided by the present invention has the advantages of low manufacturing cost, simple structure and durability. At the same time, it can effectively solve the shortcomings of high failure rate, high maintenance cost and complex control process of the original electromagnetic clutch.

[0019] Based on the above reasons, the present invention can be widely promoted in the technical field of hot strip rolling mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a front view of a mechanical pressing synchronization device of a hot rolling roughing mill in an embodiment of the present invention;

[0022] Figure 2 A top view of a mechanical pressing synchronization device of a hot rolling roughing mill in an embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of a mechanical pressing synchronization device of a hot rolling roughing mill in an embodiment of the present invention.

[0024] In the figure: 1. Drive side press-down reducer; 2. Operation side press-down reducer; 3. Drive motor; 4. Synchronous shaft; 5. WGT10 coupling; 6. Brake. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0031] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0032] like Figures 1 to 3 As shown, a mechanical pressing synchronization device of a hot rolling roughing mill includes: a driving side pressing reduction gear 1, an operating side pressing reduction gear 2, a driving motor 3, a synchronous shaft 4, a WGT10 coupling 5, a brake 6, and connecting bolts;

[0033] The synchronous shaft 4 is directly connected to the transmission side pressure reducer 1 and the operating side pressure reducer 2, so that the pressure reducers on both sides of the rolling mill form a rigid connection when running with load;

[0034] The two sets of WGT10 couplings 5 ​​are respectively connected between the synchronous shaft 4 and the transmission side push-down reducer 1 and between the synchronous shaft 4 and the operating side push-down reducer 2.

[0035] Furthermore, when the transmission motor 3 is started, the power output by the motor is transmitted to the down-shift reducer through the coupling. After the transmission side down-shift reducer 1 and the operating side down-shift reducer 2 reduce the power, the power is transmitted to the down-shift mechanism of the rolling mill, so that the rolling mill rollers start the down-shift operation. Since the synchronous shaft 4 is directly connected to the down-shift reducers on both sides to form a rigid connection, the down-shift reducers on both sides can move synchronously when running under load, eliminating the mechanical gap, improving the mechanical down-shift positioning accuracy, and ensuring that the down-shift amount on both sides of the rolling mill is consistent, avoiding the problem of wedge-shaped or skewing rolled pieces due to inconsistent down-shift on both sides.

[0036] Furthermore, when braking is required, the brake 6 acts quickly according to the control signal to brake the down-shift reducer, so that the rolling mill roller stops the down-shift operation. The rapid response and precise braking of the brake 6 can ensure the safety and reliability of the equipment in emergency situations.

[0037] Furthermore, the transmission side reduction reducer 1 and the operating side reduction reducer 2 are symmetrically arranged on both sides of the rolling mill, which reduce the power provided by the transmission motor 3 and transmit it to the corresponding reduction mechanism to realize the reduction operation of the rolling mill rolls.

[0038] Furthermore, the material of the synchronous shaft 4 is 42CrMo forged steel, and the R corner part needs to be inspected by ultrasonic flaw detection.

[0039] Furthermore, the 42CrMo forged steel has high strength and toughness, and its R-angle part needs to be subjected to ultrasonic flaw detection to ensure that there are no defects in this part, so as to ensure the quality and reliability of the synchronous shaft 4. The synchronous shaft 4 is directly connected to the transmission side pressure reducer 1 and the operating side pressure reducer 2, so that the pressure reducers on both sides of the rolling mill form a rigid connection when running under load. During the connection process, the connection part of the synchronous shaft 4 and the reducer adopts high-precision processing technology to ensure the tightness and coaxiality of the connection, thereby further improving the performance and stability of the device.

[0040] Furthermore, the transmission side reducer and the operation side reducer are symmetrically provided with the brake 6 .

[0041] Furthermore, the brake 6 adopts electromagnetic braking technology, has the characteristics of rapid response, can achieve braking in a short time, ensures the safety and reliability of the equipment in emergency situations, and the braking process is smooth without causing impact to the entire device.

[0042] Furthermore, the braking torque of the brake 6 can be adjusted according to the actual rolling conditions, and effective braking under different load conditions can be achieved through precise control of the mechanism to meet the needs of the hot rolling roughing mill at different production stages.

[0043] Furthermore, the various components are connected by the connecting bolts.

[0044] Furthermore, the transmission motor 3 provides power for the entire device.

[0045] Furthermore, the transmission motor 3 outputs a suitable rotation speed and torque according to the rolling process requirements of the hot rolling roughing mill to ensure that the reduction reducers on both sides can be driven stably.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mechanical pressing synchronization device for a hot rolling roughing mill, characterized in that: include: Transmission side pressure reducer, operation side pressure reducer, transmission motor, synchronous shaft, WGT10 coupling, brake, connecting bolts; The synchronous shaft is directly connected to the transmission side pressure reducer and the operating side pressure reducer, so that the pressure reducers on both sides of the rolling mill form a rigid connection when running with load; The two sets of WGT10 couplings are respectively connected between the synchronous shaft and the transmission side pressure reducer and between the synchronous shaft and the operation side pressure reducer.

2. The mechanical pressing synchronization device of a hot rolling roughing mill according to claim 1, characterized in that: The synchronous shaft is made of 42CrMo forged steel, and the R corners need to be inspected by ultrasonic flaw detection.

3. The mechanical pressing synchronization device of a hot rolling roughing mill according to claim 1, characterized in that: The transmission side reducer and the operation side reducer are symmetrically provided with the brakes.

4. The mechanical pressing synchronization device of a hot rolling roughing mill according to claim 1, characterized in that: The various components are connected via the connecting bolts.

5. The mechanical pressing synchronization device of a hot rolling roughing mill according to claim 1, characterized in that: The transmission motor provides power for the entire device.

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