CN117772808B - Gear device for calibrating different speed ratio and asynchronous rolling mill - Google Patents

Abstract

The present invention discloses a gear device and an asynchronous rolling mill for calibrating the speed ratio, which relate to the field of plate processing equipment, and are used to solve the problem of unstable speed ratio when the asynchronous rolling mill is working. The gear device includes: a first gear used to be coaxially connected with the upper roller; a second gear used to be coaxially connected with the lower roller; two third gears are rotatably arranged on a support seat, both meshing with the second gear, and the two third gears are symmetrically arranged on both sides of the second gear relative to the direction of the central axis connection line of the first gear and the second gear; two fourth gears are symmetrically arranged on both sides of the first gear relative to the direction of the central axis connection line of the first gear and the second gear, and the fourth gears are respectively meshed with the first gear and the adjacent third gear; a flexible adjustment component provides a force for the two fourth gears to approach the first gear. Through the gear meshing structure and the force provided by the flexible adjustment component to the gear, the speed ratio between the upper roller and the lower roller when the rolling mill is working is calibrated to improve the stability of the speed ratio.

Description

A gear device for calibrating different speed ratios and asynchronous rolling mill

Technical Field

The invention relates to the field of plate processing equipment, and in particular to a gear device for calibrating different speed ratios and an asynchronous rolling mill.

Background technique

A rolling mill is a machine that deforms metal materials through strong pressure to obtain the required shape of the material. It can be used to manufacture various profiles and blanks. Most traditional rolling mills have two working rolls and multiple support rolls. The plate enters the rolling area under the friction of the two working rolls. The two working rolls apply rolling force to the rolled piece, causing the rolled piece to deform in the rolling area to obtain the shape required for production.

Asynchronous rolling uses the difference in linear speed between the upper and lower surfaces of the plate and the rollers during rolling to increase the shear stress during plate deformation, which is beneficial for rolling hard-to-deform metals and thin strips; at the same time, asynchronous rolling can significantly reduce rolling pressure and rolling torque; in addition, in composite plate rolling, asynchronous rolling can greatly improve the warping of composite plates through "rubbing and rolling". Therefore, the accuracy of the speed ratio of the upper and lower rollers during asynchronous rolling directly determines the accuracy and shape of the product.

At present, asynchronous rolling mills usually use a controller to directly control two three-phase motors to achieve the target speed ratio. According to the mechanical characteristic curve of the motor, when the load changes, the speed will change accordingly. When the asynchronous rolling mill is working, due to the inconsistent friction between the upper and lower rollers and the upper and lower surfaces of the plate, the load of the upper and lower rollers is different, which causes the speed to change and the entire asynchronous rolling process cannot be completed at a constant speed ratio.

Summary of the invention

The object of the present invention is to provide a gear device for calibrating the speed ratio and an asynchronous rolling mill, so as to improve the stability of the speed ratio when the asynchronous rolling mill is working.

In order to achieve the above object, the present invention provides the following technical solutions:

In a first aspect, the present invention provides a gear device for calibrating a speed ratio, comprising:

Support base;

A first gear, used for being coaxially connected with the upper roller;

A second gear, used for being coaxially connected with the lower roller;

Two third gears are rotatably disposed on the support seat, the two third gears are both meshed with the second gear, and the two third gears are symmetrically arranged on both sides of the second gear relative to the direction of the central axis connecting the first gear and the second gear;

Two fourth gears are symmetrically arranged on both sides of the first gear relative to the direction of the central axis connecting the first gear and the second gear, and the fourth gears are respectively meshed with the first gear and the adjacent third gear;

The flexible adjustment component is used to provide a force for the two fourth gears to move closer to the first gear.

Optionally, the above-mentioned gear device for calibrating different speed ratios further includes: a connecting member, both ends of which are rotatably connected to the rotating shafts of the third gear and the fourth gear that are meshed with each other, so that the center distance between the third gear and the fourth gear remains unchanged.

Optionally, in the above-mentioned gear device with calibrated speed ratio, the connecting member is a connecting plate or a connecting rod.

Optionally, in the above-mentioned gear device for calibrating the different speed ratio, two groups of flexible adjustment components are provided, and the two groups of flexible adjustment components act on the two fourth gears respectively.

Optionally, in the above-mentioned gear device for calibrating the speed ratio, each set of flexible adjustment components includes:

A support plate, arranged on the support seat;

A connecting rod, one end of which is fixedly connected to the supporting plate;

A joint, one end of which is rotatably connected to the rotating shaft of one of the fourth gears, and the other end of which is fixedly connected to an end of the connecting rod away from the support plate;

The first elastic reset member is sleeved on the connecting rod, and the two ends of the first elastic reset member elastically act on the support plate and the joint respectively. The first elastic reset member is used to push the fourth gear toward the first gear along the axial direction of the connecting rod through the joint.

Optionally, in the above-mentioned gear device for calibrating the speed ratio, each set of flexible adjustment components also includes an adjusting nut, which is arranged at both ends of the first elastic reset member, and the adjusting nut is used to adjust the telescopic length of the first elastic reset member.

Optionally, in the above-mentioned gear device for calibrating the speed ratio, the two fourth gears are both provided with an arc groove, and the flexible adjustment component includes a second elastic reset member, and the two ends of the second elastic reset member are slidingly connected to the two fourth gears through the arc groove, and the second elastic reset member is used to pull the two fourth gears toward the first gear.

Optionally, in the above-mentioned gear device for calibrating different speed ratios, the gear teeth of the first gear, the second gear, the third gear and the fourth gear are spur gears, helical gears or herringbone gears;

Or, the modules of the first gear, the second gear, the third gear and the fourth gear are 1 to 3;

Or, the number of teeth of the first gear, the second gear, the third gear and the fourth gear is greater than 50.

Optionally, in the above-mentioned gear device for calibrating the speed ratio, the transmission ratio of the first gear and the second gear is the same as the speed ratio of the upper roller and the lower roller, and the transmission ratio is 0.5~1.5.

In the second aspect, the present invention also provides an asynchronous rolling mill, comprising: a frame, an upper roller, a lower roller, a hydraulic device, two driving devices and a gear device for calibrating the speed ratio as any of the above items, the upper roller and the lower roller are both rotatably arranged on the frame, the upper roller and the lower roller are arranged in sequence from top to bottom, the axial direction of the upper roller is parallel to the axial direction of the lower roller, and the upper roller is slidably connected to the frame along the direction of the line connecting the rotation centers of the upper roller and the lower roller, the hydraulic device is used to drive the upper roller to approach or move away from the lower roller, the driving end of one of the driving devices is connected to the upper roller, and the driving end of the other driving device is connected to the lower roller, the two driving devices are respectively used to drive the rotation of the upper roller and the lower roller, the support seat is arranged at the bottom of the frame, and the frame is used to support the support seat.

Compared with the prior art, when the above technical solution is adopted, the asynchronous rolling mill is started, the upper roller and the lower roller begin to rotate relatively, the rotation of the upper roller drives the first gear to rotate synchronously, and the rotation of the lower roller drives the second gear to rotate synchronously, a plate is placed in the gap between the upper roller and the lower roller, and a rolling force is generated on the plate during the continuous rotation of the upper roller and the lower roller. Due to the introduction of load between the upper and lower rollers, the rotation speed provided by the asynchronous rolling mill is unstable, that is, the transmission ratio of the first gear and the second gear is unstable. First, the third gear and the fourth gear as driven gears are meshed with the first gear and the second gear as driving gears, thereby limiting the rotation of the first gear and the second gear as driving gears, and adjusting and calibrating the rotation speed of the first gear and the second gear. The rotation speed of the wheel is adjusted, and secondly, the force applied to the fourth gear is continuously adjusted through the flexible adjustment component during the fluctuation of the transmission ratio, so as to ensure that the gears are meshed with each other during work, and the two fourth gears are adaptively adjusted in position as the position of the first gear changes, so as to realize the calibration of the speed ratio, and improve the stability of the speed ratio of the asynchronous rolling mill after the introduction of load. Compared with the traditional method of controlling the speed ratio of the rolling mill by only driving the upper and lower rollers to rotate through the AC frequency conversion speed regulation of two motors, the present application realizes the calibration of the speed ratio of the gear device after the asynchronous rolling mill introduces load through the mechanical control mode of the meshing of gears and the adaptive adjustment function of the flexible adjustment component, so as to ensure the stability of the speed ratio when the asynchronous rolling mill is working.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

FIG1 is a schematic structural diagram of a gear device for calibrating a different speed ratio provided by an embodiment of the present invention;

FIG2 is a simplified structural diagram of FIG1 ;

FIG3 is a partial connection structure diagram of a gear and a roller of a gear device for calibrating a different speed ratio provided by an embodiment of the present invention;

FIG4 is a partial connection structure diagram of a gear and a flexible adjustment component of a gear device for calibrating a different speed ratio provided by an embodiment of the present invention;

FIG5 is an exploded view of FIG4 ;

FIG6 is a comparison diagram of a gear device for calibrating a speed ratio before and after calibration provided by an embodiment of the present invention;

FIG7 is a schematic structural diagram of another gear device for calibrating different speed ratios provided by an embodiment of the present invention;

FIG8 is a simplified structural diagram of FIG7 .

Reference numerals:

1-support seat; 2-first gear; 3-second gear; 4-third gear; 41-first spindle; 5-fourth gear

Wheel; 51-second spindle; 6-flexible adjustment assembly; 611-support plate; 612-connecting rod; 613-joint;

614-first elastic reset member; 615-adjusting nut; 621-second elastic reset member; 7-connecting member; 8-

Arc groove; 91-frame; 911-rolling mill support; 912-motor support; 92-upper roller; 93-lower roller;

94-hydraulic device; 941-hydraulic cylinder; 942-hydraulic connecting rod; 95-driving device; 951-first motor;

952-second motor; 953-reduction gearbox; 954-coupling; 955-universal joint; 956-drive shaft; 96-transmission

Material plate; 97-roller support; 98-pretensioning device.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

As shown in FIGS. 1 to 8 , an embodiment of the present invention provides a gear device for calibrating a different speed ratio, hereinafter referred to as a gear device, which includes: a support seat 1 , a first gear 2 , a second gear 3 , two third gears 4 , two fourth gears 5 and a flexible adjustment component 6 .

Among them, the first gear 2 is used to be coaxially connected to the upper roller 92; the second gear 3 is used to be coaxially connected to the lower roller 93; the two third gears 4 are rotatably set on the support seat 1, the two third gears 4 are both meshed with the second gear 3, and the two third gears 4 are symmetrically arranged on both sides of the second gear 3 relative to the direction of the central axis connection direction of the first gear 2 and the second gear 3; the two fourth gears 5 are symmetrically arranged on both sides of the first gear 2 relative to the direction of the central axis connection direction of the first gear 2 and the second gear 3, and the fourth gear 5 is respectively meshed with the first gear 2 and the adjacent third gear 4; the flexible adjustment component 6 is used to provide a force for the two fourth gears 5 to approach the first gear 2.

In specific implementation, as shown in FIG1 , according to the speed ratio of the upper roller 92 and the lower roller 93, the first gear 2, the second gear 3, the third gear 4 and the fourth gear 5 are selected, and the gear module, the number of teeth, the pitch circle diameter and other parameters are calculated respectively, and the calculated corresponding first gear 2 is coaxially fixedly installed with the upper roller 92, and the second gear 3 is coaxially fixedly installed with the lower roller 93, and then the two third gears 4 rotatably set on the support seat 1 are meshed with the second gear 3, and the two third gears 4 are symmetrically arranged on both sides of the second gear 3, and then the two fourth gears 5 are symmetrically placed on both sides of the first gear 2, so that each third gear 4 is symmetrically arranged on both sides of the second gear 3. The four gears 5 are all meshed with the adjacent first gear 2 and third gear 4. Finally, the flexible adjustment component 6 is respectively set on each fourth gear 5, and the force generated by the fourth gear 5 is adaptively adjusted during operation. At this time, the asynchronous rolling mill is started, and the upper roller 92 and the lower roller 93 begin to rotate relatively. The rotation of the upper roller 92 drives the first gear 2 to rotate synchronously, and the rotation of the lower roller 93 drives the second gear 3 to rotate synchronously. A plate is placed in the gap between the upper roller 92 and the lower roller 93. In the process of continuous rotation of the upper roller 92 and the lower roller 93, a rolling force is generated on the plate. Due to the friction between the upper and lower rollers 93, a rolling force is generated on the plate. The load is input, and the speed provided by the asynchronous rolling mill is unstable, that is, the transmission ratio of the first gear 2 and the second gear 3 is unstable. First, the third gear 4 and the fourth gear 5 as the driven gears are meshed with the first gear 2 and the second gear 3 as the driving gears, thereby limiting the rotation of the first gear 2 and the second gear 3 as the driving gears, and adjusting and calibrating the speed of the first gear 2 and the speed of the second gear 3. Secondly, the flexible adjustment component 6 continuously adjusts the force applied to the fourth gear 5 during the fluctuation of the transmission ratio, ensuring that the gears are meshed with each other during work, so that the two fourth gears 5 can move along with the position of the first gear 2. The position is adjusted adaptively according to the position change to realize the calibration of the speed ratio, thereby improving the stability of the speed ratio of the asynchronous rolling mill after the introduction of the load; when the plate to be rolled is changed and the speed ratio of the asynchronous rolling mill needs to be adjusted, the above operation is repeated, and the first gear 2, the second gear 3, the third gear 4 and the fourth gear 5 are reselected according to the adjusted speed ratio, and the corresponding first gear 2 is replaced, and the force of the flexible adjustment component 6 on the fourth gear 5 is adjusted to ensure the meshing between the two fourth gears 5 and the first gear 2, that is, by replacing the first gear 2 with different numbers of teeth, the speed ratio of the asynchronous rolling mill under different working conditions is adjusted. Compared with the traditional method of controlling the speed ratio of the rolling mill by only driving the upper and lower rollers 93 to rotate through the AC variable frequency speed regulation of two motors, the present application realizes the calibration of the speed ratio of the gear device after the asynchronous rolling mill introduces the load through the mechanical control mode of mutual meshing between gears and the adaptive adjustment function of the flexible adjustment component 6, thereby ensuring the stability of the speed ratio when the asynchronous rolling mill is working.

Specifically, in this embodiment, the gear device for calibrating the speed ratio further includes a connecting member 7, the two ends of which are respectively connected to the third gear 4 and the fourth gear 5 that are meshed with each other, and the connecting member 7 is used to connect the center of the rotating shaft of the third gear 4 with the center of the rotating shaft of the fourth gear 5, so that the center distance between the third gear 4 and the fourth gear 5 remains unchanged. By connecting the center of the rotating shaft of the third gear 4 with the center of the rotating shaft of the fourth gear 5 at both ends of the connecting member 7, the center distance between the third gear 4 and the fourth gear 5 remains unchanged when the gear device is working, thereby improving the stability and transmission effect of the gear transmission when meshing.

Specifically, in this embodiment, the connecting member 7 is a connecting piece or a connecting rod 612. The connecting rod 612 and the connecting piece can provide a good connection for the third gear 4 and the fourth gear 5, ensuring the rapid linkage between two adjacent gears during the rolling process.

As shown in Figures 1 to 5, as a possible implementation method, two groups of flexible adjustment components 6 are provided, and the two groups of flexible adjustment components 6 act on the two fourth gears 5 respectively. The two groups of flexible adjustment components 6 respectively apply forces to the two fourth gears 5 that tend to mesh with the first gear 2, wherein the two groups of flexible adjustment components 6 can respectively provide each fourth gear 5 with a thrust toward the first gear 2, or the two groups of flexible adjustment components 6 can also respectively provide each fourth gear 5 with a pulling force toward the first gear 2 between the two fourth gears 5, thereby improving the stability and transmission effect of the gear transmission during meshing. Exemplarily, the force of the flexible adjustment component 6 can be spring pressure, hydraulic pressure, or pneumatic pressure, and the flexible adjustment component 6 is not specifically limited here, as long as the flexible adjustment component 6 has a force that makes the two fourth gears 5 tend to mesh with the first gear 2.

As shown in Figures 4 and 5, specifically, in this embodiment, each group of flexible adjustment components 6 includes: a support plate 611, a connecting rod 612, a joint 613 and a first elastic reset member 614, the support plate 611 is arranged on the support seat 1; one end of the connecting rod 612 is fixedly connected to the support plate 611; one end of the joint 613 is rotatably connected to a rotating shaft of one of the fourth gears 5 located at its center position, and the other end of the joint 613 is fixedly connected to an end of the connecting rod 612 away from the support plate 611; the first elastic reset member 614 is sleeved on the connecting rod 612, and the two ends of the first elastic reset member 614 elastically act on the support plate 611 and the joint 613 respectively, and the first elastic reset member 614 is used to push the fourth gear 5 along the axial direction of the connecting rod 612 toward the first gear 2 through the joint 613.

During operation, the operator rotatably supports and installs the third gear 4 on the support seat 1 through the first spindle 41, and makes the third gear 4 mesh with the second gear 3. The third gear 4 as a driven gear is matched with a deep groove ball bearing, and a retaining ring is used axially to limit the shaking of the third gear 4. The bearing is rotatably connected to one end of the connecting piece 7. The first spindle 41 passes through the support seat 1, the connecting piece 7, the bearing and the third gear 4 in sequence. End covers are provided at both ends of the first spindle 41. After the end covers are fixed by screws, the other end of the connecting piece 7 is connected to the second spindle 51 through the second spindle 51. The fourth gear 5 is rotatably supported and connected, the axial direction of the second core shaft 51 is colinear with the center of the rotation axis of the fourth gear 5, one end of the joint 613 is rotatably connected to the second core shaft 51, and the other end of the joint 613 is connected to the connecting rod 612. The operator only needs to adjust the telescopic length of the first elastic reset member 614. The two ends of the first elastic reset member 614 respectively have elastic forces on the support plate 611 and the joint 613. During adjustment, it is ensured that the first elastic reset member 614 has a force on the fourth gear 5 to approach the first gear 2 along the axial direction of the connecting rod 612.

As shown in Fig. 4, specifically, in this embodiment, each set of flexible adjustment components 6 also includes an adjustment nut 615, which is arranged at both ends of the first elastic reset member 614, and the adjustment nut 615 is used to adjust the telescopic length of the first elastic reset member 614. Among them, the connecting rod 612 adopts a 10mm screw rod, and the joint 613 adopts a fisheye joint. The operator installs the adjustment nut 615 and the gasket on both ends of the screw rod for positioning. It is only necessary to rotate the adjustment nut 615 and adjust the position of the adjustment nut 615 so that the fourth gear 5 on both sides is close to the first gear 2 and meshes. At the same time, the first elastic reset member 614 has a flexible range of about 5mm between the support plate 611 and the gasket, which is convenient for adjustment.

As shown in Figures 7 and 8, as another possible implementation method, the two fourth gears 5 are both provided with an arc groove 8, and the flexible adjustment component 6 includes a second elastic reset member 621, and the two ends of the second elastic reset member 621 are slidably connected to the two fourth gears 5 through the arc groove 8, and the second elastic reset member 621 is used to pull the two fourth gears 5 toward the first gear 2. Among them, the third gear 4 and the fourth gear 5 as driven gears are symmetrically distributed on both sides of the first gear 2 and the second gear 3 as driving gears, reducing the risk of overloading of the gear device. When it is necessary to adjust the roller gap or change the speed ratio, the operator only needs to remove the second elastic reset member 621 and adjust the two ends of the second elastic reset member 621 in the arc groove 8 of the fourth gear 5. The two ends of the second elastic reset member 621 have the force to slide along the arc groove 8 and pull the two fourth gears 5 toward the first gear 2, which is convenient for adjustment.

Specifically, in this embodiment, the second elastic reset member 621 includes a nylon rope, a pneumatic telescopic rod, a hydraulic telescopic rod or a spring. The nylon rope, the pneumatic telescopic rod, the hydraulic telescopic rod and the spring all have an elastic force that makes the two fourth gears 5 tend to mesh with the first gear 2. The second elastic reset member 621 is not specifically limited here. When the upper roller 92 "rebounds" during the rolling process, the second elastic reset member 621 can maintain the meshing of the fourth gear 5 and the first gear 2.

Specifically, in the present embodiment, the gear teeth of the first gear 2, the second gear 3, the third gear 4 and the fourth gear 5 are in the shape of spur teeth, helical teeth or herringbone teeth. Spur teeth are easy to process, which reduces the use cost of the gear device; helical teeth have smooth transmission, high transmission power and long service life, which ensure the reliability and stability of the connection structure when the gear device is working; herringbone teeth have high load-bearing capacity, high precision and smooth operation, which can reduce the noise when the gear device is working and improve the stability of the transmission of the connection structure. The gear tooth shapes of the four gears are not specifically limited here, as long as the transmission requirements are met between the first gear 2, the second gear 3, the third gear 4 and the fourth gear 5. When the asynchronous rolling mill needs to control the speed ratio of the upper roller 92 and the lower roller 93 to 1.1, it is necessary to select the four gears. It is initially selected that the six gears are all spur gears, and the gear module is set. , the number of teeth of the first gear 2 is Z ₁ , the number of teeth of the second gear 3 is Z ₂ , the number of teeth of the third gear 4 is Z ₃ , and the number of teeth of the fourth gear 5 is Z ₄ , wherein the number of teeth of the first gear 2 is / > , pitch circle diameter/> , the number of teeth of the second gear 34/> , pitch circle diameter/> , the number of teeth of the two third gears 4 are both / > 0, pitch circle diameter/> , the number of teeth of the two fourth gears 5 are both / > , pitch circle diameter/> According to the meshing relationship, the first gear 2 and the second gear 3 are driving gears, and the transmission ratio between the two driving gears is / > After the calculated corresponding first gear 2, second gear 3, third gear 4 and fourth gear 5 are installed, the asynchronous rolling mill is started to rotate the upper roller 92 and the lower roller 93, and the plate is placed between the upper roller 92 and the lower roller 93 to start rolling. The connecting member 7 pulls the fourth gear 5 and the third gear 4 to ensure that the center distance between the third gear 4 and the fourth gear 5 as the driven gear remains unchanged. At the same time, the flexible adjustment component 6 applies a force to the fourth gear 5 to make the fourth gear 5 approach the first gear 2 for meshing, so as to limit and calibrate the rotation of the driven gear to the driving gear during the rolling process. In this process, the rotation speeds of the upper and lower rollers 9311 are collected to determine the speed ratio, as shown in Figure 6 (area A in the figure is in an unloaded state, and area B is in a loaded state. Curve ① is a speed ratio change curve of the existing asynchronous rolling mill under different working conditions, and curve ② is a speed ratio change curve of the asynchronous rolling mill in this application under different working conditions). The speed ratio change curve under the condition) in the figure, after the upper roller 92 and the lower roller 93 of the asynchronous rolling mill of the present application are subjected to load, that is, the curve ② in the B area, and the curve ② in the A area remain relatively constant, and the speed ratio changes with time and remains at 1.1. In the figure, the existing asynchronous rolling mill, after the upper roller 92 and the lower roller 93 are subjected to load, that is, the curve ① in the B area, and the curve ② in the A area have a large change, and after the introduction of the load, the speed ratio changes with time gradually decreases and tends to be stable. The speed ratio after stabilization is less than 1.1. It can be seen that the asynchronous rolling mill of the present application can achieve a good effect of controlling the speed ratio stability under different working conditions; in production, when the asynchronous rolling mill needs to control the speed ratio of the upper roller 92 and the lower roller 93 to 0.9, it is necessary to re-select the four gears, and initially select six gears as herringbone gears, and set the gear module/> , where the number of teeth of the first gear 2 is / > , pitch circle diameter/> , the number of teeth of the second gear 34/> , pitch circle diameter/> , the number of teeth of the two third gears 4 are both / > 0, pitch circle diameter , the number of teeth of the two fourth gears 5 are both / > , pitch circle diameter/> , the transmission ratio between the two driving gears is/> The connecting member 7 pulls the fourth gear 5 and the third gear 4 to ensure that the center distance between the third gear 4 and the fourth gear 5 as the driven gear remains unchanged. At the same time, the flexible adjustment component 6 applies a force to the fourth gear 5 to make the fourth gear 5 approach the first gear 2 for engagement, thereby limiting and calibrating the rotation of the driving gear by the driven gear during the rolling process, thereby improving the stability of the speed ratio when the asynchronous rolling mill is working.

Specifically, in this embodiment, the modules of the first gear 2, the second gear 3, the third gear 4 and the fourth gear 5 are 1 to 3. The module of the gear can be 1, 1.25, 1.3, 1.5, 2, 3, etc. The module of the gear is not specifically limited here, as long as the selected gear module meets the meshing requirements, and selecting a suitable module can ensure the stability and transmission effect of the gear transmission during meshing.

Specifically, in this embodiment, the number of teeth of the first gear 2, the second gear 3, the third gear 4 and the fourth gear 5 is greater than 50. Exemplarily, the number of teeth of the first gear 2, the second gear 3, the third gear 4 and the fourth gear 5 can be selected to be 60 teeth, 90 teeth, 125 teeth, 128 teeth, 140 teeth, etc., and the number of teeth of the gear is not specifically limited here, as long as the number of teeth of the selected gear meets the meshing requirements, selecting a suitable number of teeth can ensure the stability and transmission effect of the gear transmission during meshing.

Specifically, in this embodiment, the transmission ratio of the first gear 2 and the second gear 3 is the same as the speed ratio of the upper roller 92 and the lower roller 93, and the transmission ratio is 0.5 to 1.5. For example, when the transmission ratio is 0.5, the speed ratio is also 0.5; when the transmission ratio is 1.2, the speed ratio is also 1.2; when the transmission ratio is 1.5, the speed ratio is also 1.5. The transmission ratio of the first gear 2 and the second gear 3 is not specifically limited here, as long as the speed ratio of the upper and lower rollers 93 is the same as the transmission ratio of the first gear 2 and the second gear 3 when the rolling mill is working.

Meanwhile, the present invention also provides an asynchronous rolling mill, comprising: a frame 91, an upper roller 92, a lower roller 93, a pre-tightening device 98, a hydraulic device 94, two driving devices 95 and a gear device for calibrating a speed ratio as described above, the upper roller 92 and the lower roller 93 are fixedly arranged on the frame 91 through a roller support 97, the upper roller 92 and the lower roller 93 are arranged in sequence from top to bottom, the axial direction of the upper roller 92 is parallel to the axial direction of the lower roller 93, and the upper roller 92 is slidably connected to the frame 91 along the direction of the line connecting the rotation centers of the upper roller 92 and the lower roller 93, and the frame 91 has a guide groove, The guide of the guide groove is parallel to the direction of the line connecting the rotation centers of the upper roller 92 and the lower roller 93. The hydraulic device 94 is used to drive the upper roller 92 to slide in the guide groove. The pre-tightening device 98 is arranged on the frame 91. The driving end of the pre-tightening device 98 is connected to the upper roller 92. The driving end of one driving device 95 is coaxially connected to the upper roller 92, and the driving end of the other driving device 95 is coaxially connected to the lower roller 93. The two driving devices 95 are respectively used to drive the rotation of the upper roller 92 and the rotation of the lower roller 93. The support seat 1 is arranged at the bottom of the frame 91, and the frame 91 is used to support the support seat 1.

During operation, the drive device 95 is started. The drive device 95 includes a first motor 951 and a second motor 952. The driving end of the first motor 951 is decelerated by the reduction box 953, and then transmitted to the transmission shaft 956 through the coupling 954 and the universal joint 955. The transmission shaft 956 is coaxially connected to the upper roller 92 to drive the upper roller 92 to rotate. The driving end of the second motor 952 is decelerated by the reduction box 953, and then transmitted to the transmission shaft 956 through the coupling 954 and the universal joint 955. The transmission shaft 956 is coaxially connected to the lower roller 93 to drive the lower roller 93 to rotate. During the continuous rolling process, the operator places the plate on the feeding plate 96, and the hydraulic device 94 is connected to the lower roller 93 through the hydraulic cylinder 94. 1 drives the hydraulic connecting rod 942 to move, so that the upper roller 92 is subjected to the force of the hydraulic connecting rod 942 to slide along the guide groove and move closer to or farther away from the lower roller 93. During the rolling process, the upper roller 92 is prone to "rebound", so that the upper roller 92 drives the first gear 2 to vibrate up and down along the line connecting the rotation centers of the upper roller 92 and the lower roller 93. The fourth gear 5 and the first gear 2 can continue to be engaged through the flexible adjustment component 6. If the motor speed or gear configuration causes a large speed ratio difference due to misoperation or machine failure, the force between the gears increases sharply, and the fourth gear 5 retreats under the action of the flexible adjustment component 6 to prevent the gear from collapsing and causing safety hazards. The pre-tightening device 98 is arranged on the frame 91. At this time, the pre-tightening device 98 provides an upward force to the roller support 97 away from the upper roller 92, reducing the small gap and deformation in the assembly caused by the self-weight of the upper roller 92 and the roller support 97, so that the hydraulic device 94 can drive the roller support 97 more timely, that is, the pre-tightening device 98 acts on the upper roller 92, reducing the rebound of the upper roller 92 with the roller support 97, so that the upper roller 92 and the lower roller 93 continue to rotate to generate rolling force on the plate, and a gear device for calibrating the speed ratio is arranged at one end of the upper roller 92 away from the transmission shaft 956 and one end of the lower roller 93 away from the transmission shaft 956. During the continuous rolling process, the mechanical control mode of the mutual meshing between the gears and the adaptive adjustment function of the flexible adjustment component 6 are continuously used to realize the calibration of the speed ratio of the asynchronous rolling mill after the load is introduced, so as to ensure the stability of the speed ratio when the asynchronous rolling mill is working.

Specifically, in this embodiment, the frame 91 includes: a rolling mill support 911 and a motor support 912. The rolling mill support 911 is provided with a base. The upper roller 92, the lower roller 93, the hydraulic device 94, and the pre-tightening device 98 are all arranged on the rolling mill support 911. The driving device 95 is arranged on the motor support 912. The motor support 912 is used to support and fix the driving device 95, thereby ensuring the stability of the overall asynchronous rolling mill structure.

In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (5)

1. A gear device for calibrating a different speed ratio, characterized by comprising: Support base; A first gear, used for being coaxially connected with the upper roller; A second gear, used for being coaxially connected with the lower roller; Two third gears are rotatably disposed on the support seat, the two third gears are both meshed with the second gear, and the two third gears are symmetrically arranged on both sides of the second gear relative to the direction of the central axis connecting the first gear and the second gear; Two fourth gears are symmetrically arranged on both sides of the first gear relative to the direction of the central axis connecting the first gear and the second gear, and the fourth gears are respectively meshed with the first gear and the adjacent third gear; A flexible adjustment component, used for providing a force for the two fourth gears to approach the first gear; A connecting member, both ends of which are rotatably connected to the rotating shafts of the third gear and the fourth gear that are meshed with each other, so that the center distance between the third gear and the fourth gear remains unchanged, and both of the two fourth gears are provided with arc grooves. The flexible adjustment component includes a second elastic reset member, and both ends of the second elastic reset member are slidably connected to the two fourth gears through the arc grooves. The second elastic reset member is used to pull the two fourth gears toward the first gear. 2. The gear device for calibrating different speed ratios according to claim 1, characterized in that the connecting member is a connecting plate or a connecting rod. 3. The gear device for calibrating different speed ratios according to claim 1, characterized in that the gear teeth of the first gear, the second gear, the third gear and the fourth gear are straight teeth, helical teeth or herringbone teeth; Or, the modules of the first gear, the second gear, the third gear and the fourth gear are 1 to 3; Or, the number of teeth of the first gear, the second gear, the third gear and the fourth gear is greater than 50. 4. The gear device for calibrating the speed ratio according to claim 1 is characterized in that the transmission ratio of the first gear and the second gear is the same as the speed ratio of the upper roller and the lower roller, and the transmission ratio is 0.5~1.5. 5. An asynchronous rolling mill, characterized in that it comprises: a frame, an upper rolling roller, a lower rolling roller, a hydraulic device, two driving devices and a gear device for calibrating the speed ratio as described in any one of claims 1 to 4, wherein the upper rolling roller and the lower rolling roller are both rotatably arranged on the frame, the upper rolling roller and the lower rolling roller are arranged in sequence from top to bottom, the axial direction of the upper rolling roller is parallel to the axial direction of the lower rolling roller, and the upper rolling roller is slidably connected to the frame along the direction of the line connecting the rotation centers of the upper rolling roller and the lower rolling roller, the hydraulic device is used to drive the upper rolling roller to approach or move away from the lower rolling roller, the driving end of one of the driving devices is connected to the upper rolling roller, and the driving end of the other driving device is connected to the lower rolling roller, the two driving devices are used to drive the rotation of the upper rolling roller and the rotation of the lower rolling respectively, the support seat is arranged at the bottom of the frame, and the frame is used to support the support seat.