Single-piece feeding device for rolling mill

Abstract

The utility model belongs to the technical field of steel rolling, and relates to a single-piece feeding device for a rolling mill, which comprises a fixed sliding rail, a fixed sliding rail, a fixed sliding rail and a movable sliding rail, the sliding frame body is arranged on the fixed sliding rail in a sliding manner; the conveying belt is arranged on the sliding frame body in a surrounding manner so as to convey the plate strip to a rolling mill inlet; the embossing roller pressing device is mounted above the conveying belt and is arranged at one end, close to the rolling mill, of the conveying belt; the elastic sliding plate is arranged below the pressing embossing roller device and installed in the sliding frame body, and a clamping space is formed by the elastic sliding plate and the pressing embossing roller device so as to clamp the conveying belt. The fixed sliding seat is mounted on a rack of the rolling mill; the two ends of the push-pull oil cylinder are connected with the fixed sliding base and the sliding frame body correspondingly so as to drive the sliding frame body to move close to or away from the rolling mill along the fixed sliding rail. The single plate strip is firmly pressed on the conveying belt through the pressing embossing roller device, so that the friction force between the plate strip and the belt is obviously increased, and the conveying force is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of rolling steel technology and relates to a single-piece feeding device for a rolling mill. BACKGROUND

[0002] In the metal processing industry, single-piece rolling or leveling process is an important link in the production of high-quality plate strips. As the key equipment in this process, the single-piece feeding device for a rolling mill is responsible for accurately and stably conveying single-piece plate strips into the rolling mill to ensure the smooth progress of the rolling or leveling process. Currently, the single-piece feeding devices for a rolling mill widely used in the market are mostly roller bed structures, which apply a certain pressure to the steel plate through the pressure roller close to the rolling roller to enhance the biting assistance and improve the conveying stability of the plate strip.

[0003] However, with the continuous development of metal processing technology and the expansion of application fields, higher requirements are put forward for the single-piece feeding device for a rolling mill. Although the traditional roller bed structure meets the feeding needs of long plate materials to some extent, its limitations gradually appear when dealing with smaller-sized samples, especially when the incoming material is short and thin. Short and thin plate materials are more susceptible to external forces during the conveying process and are prone to head warping or warping. The traditional roller bed structure often fails to provide sufficient friction to ensure the stable conveying of the plate materials, resulting in the plate materials failing to smoothly enter the roll gap and affecting the quality of rolling or leveling. In addition, the existing single-piece feeding device for a rolling mill of the roller bed structure also has deficiencies in adapting to incoming materials of different thicknesses and lengths. The contact area between the roller and the plate material is limited, and the rigidity and pressure distribution of the roller are difficult to flexibly adjust according to the actual situation of the plate material. Therefore, when the thickness or length of the plate material changes, the roller bed structure often fails to provide appropriate friction, resulting in the plate material sliding or deviating during the conveying process, which further affects the precision and efficiency of rolling or leveling. This lack of flexibility in design limits the application of the single-piece feeding device for a rolling mill in diversified production needs.

[0004] Especially when dealing with plate strips with head warping or warping, the existing single-piece feeding device for a rolling mill of the roller bed structure is even more unsatisfactory. Head warping or warping not only increases the difficulty of the plate material entering the roll gap, but also may cause uneven stress of the plate material in the roll gap, resulting in defects such as cracks and wrinkles, which seriously affect the quality and performance of the plate material. In order to solve this problem, the existing method often needs to perform additional straightening treatment on the plate material before feeding, which not only increases the complexity of the production process, but also increases the production cost. Therefore, there is an urgent need for a single-piece feeding device for a rolling mill that can adapt to incoming materials of different thicknesses and lengths and still ensure the smooth entry of the plate strip into the roll gap even if the plate strip has head warping or warping.

[0005] In view of the above, it is of great significance to develop a new single-piece feeding device for rolling mill to solve the limitations of the existing roller structure in adapting to different thickness and length of incoming materials, processing warped head or warped plates, and to improve the production efficiency of the metal processing industry, reduce production costs and improve product quality. SUMMARY

[0006] Therefore, the single-piece feeding device for rolling mill is provided to solve the problems in the background art.

[0007] To achieve the above object, the utility model provides the following technical scheme.

[0008] A single-piece feeding device for rolling mill, comprising:

[0009] A fixed slide rail is fixedly installed on the entry side of the frame of the rolling mill.

[0010] A sliding frame body is slidably arranged on the fixed slide rail.

[0011] A conveying belt is arranged around the sliding frame body to convey the plate strip to the entry of the rolling mill.

[0012] A pressing pattern roller device is installed above the conveying belt and arranged at one end of the conveying belt close to the rolling mill.

[0013] An elastic sliding plate is arranged below the pressing pattern roller device and installed inside the sliding frame body, forming a clamping space with the pressing pattern roller device to clamp the conveying belt.

[0014] A fixed slide seat is installed on the frame of the rolling mill.

[0015] A push-pull oil cylinder is connected to the fixed slide seat and the sliding frame body at both ends to drive the sliding frame body to move along the fixed slide rail towards or away from the rolling mill.

[0016] Further, a transmission roller and a deflection roller are arranged in the sliding frame body to drive the conveying belt.

[0017] The transmission roller is drivingly connected to a motor installed in the sliding frame body through a roller chain.

[0018] Further, the surface of the transmission roller is knurled to increase the friction between the conveying belt.

[0019] Further, the pressing pattern roller device comprises roller seats installed on the sliding frame body and located on both sides of the conveying belt, and a plurality of pattern rollers rotatably connected between the roller seats to press the plate strip against the conveying belt.

[0020] Further, a centering adjustment cross bar is arranged between the roller seats, a strip-shaped hole is arranged in the centering adjustment cross bar, and a centering adjustment baffle is slidably connected through the strip-shaped hole to prevent the plate strip from deviating during conveying.

[0021] Further, the elastic slide plate comprises a slide plate and a fixing seat arranged at the bottom of the slide plate and fixedly connected with the slide frame body, the fixing seat is connected with the slide plate through an elastic sleeve, and a spring is arranged in the elastic sleeve to adapt to plate strips with different thicknesses.

[0022] Further, a centering device is arranged on the side of the pressing flower roller device away from the rolling mill.

[0023] The centering device comprises a hydraulic motor, a lead screw, a nut, a right push plate, a left push plate, a guide rod and a fixing seat, the fixing seat is arranged on the slide frame body and located on both sides of the conveying belt, the lead screw and the guide rod are arranged between the fixing seats, the lead screw is rotationally connected with the fixing seat and drivingly connected with the hydraulic motor.

[0024] The right push plate and the left push plate are sleeved on the lead screw and the guide rod and are threadedly connected with the lead screw through the nut fixedly arranged thereon, the lead screw is provided with left-hand and right-hand threads at both ends to correspond to the right push plate and the left push plate, so that the right push plate and the left push plate move synchronously inward or outward, and the plate strip is centered.

[0025] Further, a belt tensioning device is arranged, the belt tensioning device comprises a tensioning seat fixedly arranged in the slide frame body and two fixed rollers and an adjustable roller rotationally arranged between the tensioning seats, the adjustable roller is located between the two fixed rollers and the conveying belt located on the lower side of the slide frame body is sequentially wound around the two fixed rollers and the adjustable roller, and the height of the adjustable roller is adjusted to adjust the tensioning force of the conveying belt.

[0026] Further, the adjustable roller is vertically slidably arranged in the tensioning seat and is threadedly connected with an adjusting screw vertically clamped in the tensioning seat, and the height of the adjustable roller is adjusted by rotating the adjusting screw.

[0027] Further, the slide frame body and the fixed slide rail are slidably connected through a roller.

[0028] The beneficial effects of the utility model lie in:

[0029] The core of the utility model lies in through the single piece of plate belt is firmly pressed on the conveying belt by the pressing flower roller device, thereby the friction between the plate belt and the belt is increased obviously. This design not only enhances the conveying force, ensures that the plate belt is stable and does not slip in the transportation process, but also can form certain tension between the plate belt and the belt when the plate belt enters the roll, effectively improves the flatness of rolling, reduces the wave or warping phenomenon. This innovative pressing mode optimizes the conveying effect, directly improves the precision and surface quality of the rolled product, and reflects the practical value of the technical scheme in improving production quality.

[0030] The elastic slide plate in the technical scheme is supported by the spring in the telescopic cylinder, can float up and down, flexibly buffer and adapt to different plate strips with thickness between 2mm and 10mm. Even if the plate strip exists head warping or warping, the elastic slide plate can ensure the close adhesion of the plate strip and the conveying belt through the elastic action of the spring, ensure that it enters the roll gap smoothly. This design can cope with various specifications of plate strips without frequent adjustment of equipment, enhances the universality and production efficiency of the device, and shows its high adaptability and practicality in complex production scenes.

[0031] To ensure the stability and position accuracy of the plate strip conveying, the technical scheme is provided with the centering baffle on both sides of the pressing flower roller device, cooperates with the centering device, can effectively prevent the plate strip from deviating in the transportation process. Meanwhile, the elastic slide plate and the flower roller cooperatively clamp the conveying belt, further stabilize the plate strip position, ensure that it enters the mill entrance in the middle. This structural design realizes accurate centering control through simple mechanical principle, reduces the production interruption and quality defects caused by plate strip deviation. The innovation lies in the ingenious combination of the centering baffle and the elastic structure, and the practicality lies in improving the conveying accuracy and production efficiency.

[0032] Other advantages, objects and features of the utility model will be described in the subsequent specification to some extent, and to some extent, it will be obvious to those skilled in the art based on the study of the following text or can be taught from the practice of the utility model. The objects and other advantages of the utility model can be realized and obtained by the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to make the purpose, technical scheme and advantages of the utility model more clear, the preferred detailed description of the utility model will be described below in combination with the drawings, in which:

[0034] Figure 1 It is a structure schematic view of a single piece feeding device for rolling mill in the embodiment;

[0035] Figure 2 It is an axonometric view of a single piece feeding device for rolling mill in the embodiment;

[0036] Figure 3 Structure diagram of the belt tensioning device in the embodiment;

[0037] Figure 4 Structure diagram of the belt tensioning device in the embodiment;

[0038] Figure 5 Axonometric view of the centering device in the embodiment;

[0039] Figure 6 Axonometric view of the pressing flower roller device in the embodiment;

[0040] Figure 7 Structure diagram of the elastic slide plate in the embodiment.

[0041] Reference signs: fixed slide rail 1, motor and transmission roller 2, conveying belt 3, belt tensioning device 4, centering device 5, pressing flower roller device 6, push-pull oil cylinder 7, fixed slide base 8, slide frame body 9, roller 10, elastic slide plate 11;

[0042] Motor and transmission roller 2: motor 21, transmission roller 22;

[0043] Belt tensioning device 4: tensioning seat 41, fixed roller 42, adjusting roller 43, adjusting bolt 44;

[0044] Centering device 5: hydraulic motor 51, lead screw 52, nut 53, right push plate 54, left push plate 55, guide rod 56, fixed base 57;

[0045] Pressing flower roller device 6: roller seat 61, flower roller 62, centering adjusting cross bar 63, centering adjusting baffle 64, outlet pressing plate 65;

[0046] Elastic slide plate 11: slide plate 111, fixed base 112, telescopic sleeve 113, spring 114. DETAILED DESCRIPTION

[0047] The embodiments of the present application will be described in detail with specific examples. Those skilled in the art can easily understand other advantages and functions of the present application from the content disclosed in the specification. The present application can also be implemented or applied in other different embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0048] The drawings are only used for exemplary illustration, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation on the utility model; in order to better illustrate the embodiments of the utility model, some components of the drawings can be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures in the drawings and their descriptions can be omitted.

[0049] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear" and the like is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the device or element referred to must have a specific orientation, a specific orientation and operation, therefore, the terms describing the position relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the utility model, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0050] Please refer to Figures 1-7 It is a single piece feeding device for rolling mill, comprising:

[0051] The fixed slide rail 1 is fixedly installed on the inlet side of the frame of the rolling mill.

[0052] The sliding frame body 9 is slidably arranged on the fixed slide rail.

[0053] The conveying belt 3 is arranged around the sliding frame body 9 to convey the strip to the inlet of the rolling mill.

[0054] The pressing roller device 6 is installed above the conveying belt and arranged at one end of the conveying belt close to the rolling mill.

[0055] The elastic slide plate 11 is arranged below the pressing roller device 6 and installed inside the sliding frame body 9, and forms a clamping space with the pressing roller device 6 to clamp the conveying belt.

[0056] The fixed slide seat 8 is installed on the frame of the rolling mill.

[0057] The push-pull oil cylinder 7 is connected to the fixed slide seat 8 and the sliding frame body 9 at both ends respectively to drive the sliding frame body 9 to move along the fixed slide rail 1 close to or away from the rolling mill.

[0058] Embodiment 1

[0059] As Figure 1 And Figure 2As shown, this embodiment provides a single-sheet feeding device for a rolling mill, used to feed single sheets of strip into the rolling mill for rolling or leveling. The device includes the following components: a fixed slide rail 1, a sliding frame 9, a conveyor belt 3, a pressing roller device 6, an elastic slide plate 11, a fixed slide block 8, a push-pull cylinder 7, and other auxiliary components.

[0060] Device structure description

[0061] Fixed slide rail 1 and sliding frame 9: Fixed slide rail 1 is made of high-strength steel, is long and narrow, and is fixedly installed on the inlet side of the mill stand as the supporting foundation for the entire device. Sliding frame 9 is a rectangular frame structure that can be slidably connected to fixed slide rail 1 via slider or roller 10 to ensure that it can move smoothly on fixed slide rail 1.

[0062] Conveyor belt 3: The conveyor belt 3 is made of wear-resistant rubber material and is wrapped around the sliding frame 9. Its width is 500mm, and its length is approximately 3000mm, designed according to the dimensions of the sliding frame 9. The conveyor belt 3 is driven by a drive roller 22 and a guide roller. The drive roller 22 is installed at the end of the sliding frame 9 furthest from the rolling mill, and the guide roller is installed at the end closest to the rolling mill. The drive roller 22 has a knurled surface and a diameter of [missing information]. The length is 380mm to increase friction with the conveyor belt 3, and the diameter of the steering roller is... The length is 380mm. The drive roller 22 is connected to the motor 21 mounted on the sliding frame 9 via a roller chain. The motor 21 has a power of 1.1kW and a speed of 1400 rpm, and controls the belt conveyor speed to be 0-45m / min.

[0063] Pressing roller device 6: such as Figure 6 As shown, the pressing roll device 6 is installed above the conveyor belt 3, near one end of the mill, to press the strip onto the conveyor belt 3. This device includes roll seats 61 and patterned rolls 62. There are two roll seats 61, fixed to the sliding frame 9 on both sides of the conveyor belt 3. The two patterned rolls 62 are rotatably connected between the roll seats 61 via bearings, and the diameter of the roll shaft of each patterned roll 62 is [missing information]. Roller diameter is Each roller, 450mm in length, features a textured surface to enhance grip. Each roller has three rollers. Additionally, a centering adjustment crossbar 63 is provided between the roller seats 61. The crossbar 63 has a slotted hole and is slidably connected to a centering adjustment baffle 64 via bolts. The centering adjustment baffle 64 can be adjusted left and right along the slotted hole, with a centering range of 100-380mm, preventing the belt from deviating during transport.

[0064] Furthermore, an outlet pressure plate 65 is provided at the outlet of the pressing roller device 6 to prevent the conveyor belt from warping and further ensure the reliability of the conveyor belt.

[0065] Elastic skateboard 11: such as Figure 7 As shown, the elastic slide plate 11 is arranged below the pressing roller device 6 and installed inside the sliding frame 9, forming a clamping space with the roller 62 to clamp the conveyor belt 3. The elastic slide plate 11 includes a slide plate 111 and a fixed seat 112. The slide plate 111 is a flat steel plate, 450mm long and 500mm wide; the fixed seat 112 is welded to the sliding frame 9 and connected to the slide plate 111 through a telescopic sleeve 113. A spring 114 is provided inside the telescopic sleeve 113. The spring coefficient of the spring 114 is 50N / mm, allowing the slide plate 111 to float up and down by about 20mm to accommodate different belt thicknesses between 2mm and 10mm.

[0066] Fixed slide 8 and push-pull cylinder 7: The fixed slide 8 is a steel component, fixed to the rolling mill frame and slidably connected to the sliding frame, also serving to support the sliding frame. The push-pull cylinder 7 is a hydraulically driven device with a cylinder diameter of [missing information]. The stroke is 1000mm. One end is hinged to the fixed slide block 8, and the other end is hinged to the sliding frame 9. It is used to drive the sliding frame 9 to move closer to or away from the rolling mill along the fixed slide rail 1.

[0067] Centering device 5: such as Figure 5 As shown, the centering device 5 is arranged on the side of the pressing roll device 6 away from the mill, and is used to adjust the strip to the center position of the conveyor belt 3. This device includes a hydraulic motor 51, a lead screw 52, ​​a nut 53, a right push plate 54, a left push plate 55, a guide rod 56, and fixed seats 57. The two fixed seats 57 are fixed to the sliding frame 9, located on both sides of the conveyor belt 3. The lead screw 52 is 1000mm long, with left-hand and right-hand threads at both ends, and is connected to the hydraulic motor 51 (3kW power). The guide rod 56 is parallel to the lead screw 52 and assists in the movement of the right push plate 54 and the left push plate 55. The right push plate 54 and the left push plate 55 are threaded to the lead screw 52 via the nut 53. When the lead screw 52 rotates, the two push plates move synchronously inward or outward to adjust the position of the strip.

[0068] Belt tensioning device 4: such as Figure 3 and Figure 4 As shown, the belt tensioning device 4 is installed on the lower side of the sliding frame 9 and is used to adjust the tension of the conveyor belt 3. This device includes a tensioning seat 41, two fixed rollers 42, and an adjusting roller 43. The tensioning seat 41 is a steel frame, and the fixed rollers 42 have a diameter of [missing information]. The rollers are rotatably mounted at both ends of the tensioning seat 41. The diameter of the adjusting roller 43 is... Located between two fixed rollers 42, it is slidably connected to the tensioning seat 41 via a vertical groove. The adjusting roller 43 is threadedly connected to the adjusting bolt 44, the diameter of which is... The rotation of the adjusting bolt 44 can move the adjusting roller 43 up and down by about 50mm, thereby adjusting the tension of the conveying belt 3.

[0069] The working process is as follows:

[0070] 1. The push-pull oil cylinder 7 extends and retracts, driving the sliding frame body 9 to move along the fixed slide rail 1 to the working position close to the rolling mill.

[0071] 2. The motor 21 drives the transmission roller 22 through the roller chain, so that the conveying belt 3 starts to run.

[0072] 3. The operator places the strip on the conveying belt 3, and the strip moves with the conveying belt 3 to the entrance of the rolling mill.

[0073] 4. The centering device 5 is started, the hydraulic motor 51 drives the lead screw 52 to rotate, and the right push plate 54 and the left push plate 55 move synchronously inward, adjusting the strip to the center of the conveying belt 3.

[0074] 5. When the strip reaches the compression roller device 6, the compression roller 62 compresses it on the conveying belt 3, and the centering adjustment baffle 64 prevents the strip from deviating.

[0075] 6. The elastic slide plate 11 supports the conveying belt 3 through the elastic action of the spring 114 and adapts to the thickness of the strip, ensuring that the strip is tightly attached to the conveying belt 3.

[0076] 7. The strip is finally smoothly sent to the entrance of the rolling mill for subsequent processing.

[0077] Example 2

[0078] This example has basically the same structure as Example 1, with the following details adjusted to meet different production needs.

[0079] Difference Description

[0080] Compression roller device 6: In this example, the compression roller device 6 contains three compression rollers 62 or six compression rollers 62, each compression roller 62 has a diameter of 450mm in length, which increases the number of compression rollers compared to Example 1. This design is suitable for conveying wider or heavier strips (such as strips wider than 600mm) to provide more uniform compression force.

[0081] Centering device 5: The hydraulic motor 51 is replaced with a more powerful model (5kW) to provide stronger driving force to meet the centering needs of strips up to 800mm wide or heavier.

[0082] Conveying belt 3: The width of the conveying belt 3 is increased to 600mm to match the conveying needs of wider strips, and the width of the sliding frame body needs to be increased to 700mm accordingly.

[0083] The working process is as follows:

[0084] The working process is the same as that of Example 1, and only in the centering and pressing link, due to the increase of the number of pattern rollers and the power of the hydraulic motor, the device can more stably handle wider or heavier strip, ensuring the conveying accuracy and stability.

[0085] The above Examples 1 and 2 describe in detail the structure, component functions and working process of a single-piece feeding device for a rolling mill. The technical scheme significantly improves the conveying force and rolling flatness through the coordinated action of the pressing pattern roller device and the elastic slide plate, and at the same time, it adapts to different thicknesses of strip material by virtue of the spring buffer design, and prevents deviation by the centering baffle, ensuring the conveying accuracy. The innovation lies in the unique functional integration, and the practicality is reflected in the efficient and flexible production application, which brings significant technical advantages and economic benefits to the rolling process.

[0086] Finally, it should be pointed out that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A single sheet feeding device for a rolling mill, characterized in that, The utility model relates to a kind of plate strip conveying device, including: Fixed slide rail, fixedly installed in the rack inlet side of rolling mill; Sliding frame body, slidably disposed on the fixed slide rail; Conveying belt, around disposed on sliding frame body, to be conveyed to the inlet of rolling mill with plate strip; Pressing pattern roller device, installed above the conveying belt, and arranged in the end of conveying belt close to rolling mill; Elastic slide plate, arranged below the pressing pattern roller device, and installed in the inside of sliding frame body, and with pressing pattern roller device form clamping space, to clamp conveying belt; Fixed slide, installed on the rack of rolling mill, and slidingly connected with sliding frame body; Push-pull oil cylinder, two ends are connected fixed slide and sliding frame body respectively, to drive sliding frame body along fixed slide rail to move close to or away from rolling mill.

2. The single sheet feeding device for a rolling mill according to claim 1, characterized in that, It also includes transmission roller and deflection roller arranged in sliding frame body to drive conveying belt; The transmission roller is driven by a roller chain and a motor installed in the sliding frame body.

3. The single sheet feeding device for a rolling mill according to claim 2, characterized in that, The surface of the transmission roller is knurled to increase the friction between the conveying belt.

4. The single sheet feeding device for a rolling mill according to claim 1, characterized in that, The pressing pattern roller device includes roller seats installed on the sliding frame body and located on both sides of the conveying belt, and a plurality of rotatingly connected pattern rollers between the roller seats to press the plate strip on the conveying belt.

5. The single sheet feeding device for a rolling mill according to claim 4, characterized in that, A centering adjustment crossbar is also provided between the roller seats, and a strip-shaped hole is provided in the centering adjustment crossbar, and a centering adjustment baffle is slidably connected through the strip-shaped hole to prevent the plate strip from deviating during conveying.

6. The single sheet feeding device for a rolling mill according to claim 1, characterized in that, The elastic slide plate includes a slide plate and a fixed seat arranged at the bottom of the slide plate and fixedly connected with the sliding frame body, and the fixed seat is connected with the slide plate through a telescopic sleeve, and a spring is arranged in the telescopic sleeve to adapt to plate strips of different thicknesses.

7. The single sheet feeding device for a rolling mill according to claim 1, characterized in that, It also includes a centering device arranged on the side of the pressing pattern roller device away from the rolling mill. The centering device includes a hydraulic motor, a lead screw, a nut, a right push plate, a left push plate, a guide rod and a fixed seat, the fixed seat is two and is installed on the sliding frame body and located on both sides of the conveying belt, the lead screw and the guide rod are installed between the fixed seats, the lead screw is rotationally connected with the fixed seat and is drivingly connected with the hydraulic motor. The right push plate and the left push plate are sleeved on the lead screw and the guide rod, and are threadedly connected with the lead screw through the nut fixedly installed thereon, and the left and right threads at both ends of the lead screw correspond to the right push plate and the left push plate, so that the right push plate and the left push plate move synchronously inward or outward, thereby centering the plate strip.

8. The single sheet feeding device for a rolling mill according to claim 1, characterized in that, It also includes a belt tensioning device, the belt tensioning device includes a tensioning seat fixedly installed in the sliding frame body and two fixed rollers and an adjustable roller rotatably installed between the tensioning seat, and the adjustable roller is located between the two fixed rollers and on the lower side of the conveying belt of the sliding frame body, and the conveying belt sequentially passes through the two fixed rollers and the adjustable roller, and the height of the adjustable roller is adjusted to adjust the tension of the conveying belt.

9. The single sheet feeding device for a rolling mill according to claim 8, characterized in that, The adjustable roller is vertically slidably arranged in the tensioning seat and is threadedly connected with an adjusting screw vertically clamped in the tensioning seat, so as to adjust the height of the adjustable roller by rotating the adjusting screw.

10. The single sheet feeding device for a rolling mill according to claim 1, characterized in that, The sliding frame body and the fixed slide rail are slidably connected through a roller.

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