Convenient clamping type charging tool for hot rolling of metal sheets

Abstract

The utility model provides a convenient clamping type charging tool for hot rolling of metal sheets, which comprises a tool body, the tool body is of a polyhedral structure, and the tool body is provided with an open containing cavity for containing the metal sheets; the tool body comprises a bottom plate and a back plate, the back plate is opposite to an opening of the containing cavity, and the bottom plate and the back plate are connected in a non-right-angle mode so that the multiple layers of metal sheets stacked on the bottom plate can be arranged in a stepped mode under the inclined blocking effect of the back plate. The utilization rate of the heating furnace can be greatly improved by placing the sheet stock into the loading tool, meanwhile, the back plate of the tool is designed to be in a slope shape so that the sheet stock can be conveniently clamped, the production efficiency is greatly improved, the tool further has a heat preservation effect, temperature loss of other sheet stocks in the furnace can be relieved during material clamping, and the service life of the heating furnace is prolonged. And therefore, the quality uniformity is ensured while the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal material processing, in particular to a convenient clamping loading tool for hot rolling of metal sheets. Background Art

[0002] Hot rolling is a common processing technology in metal processing, especially for some metal materials with poor plasticity. Hot rolling can greatly improve the deformation ability of the material. Because the plasticity of the metal increases during hot rolling, the deformation resistance decreases, and the energy required for metal deformation decreases, which helps processing deformation.

[0003] In recent years, various industries have increasingly higher requirements for metal materials. For example, the aerospace and 3C industries have put forward high-strength and lightweight requirements. Therefore, many new materials have been developed at home and abroad to meet market demand, such as aluminum-based composite materials, which not only have high strength and elastic modulus, but also have low density. At present, they have been applied in the aerospace and 3C fields, and the demand is gradually increasing. This kind of material with high strength generally has poor plasticity, so it is difficult to process. In addition, the market demand for lightweight, so the material thickness is required to be thin, which greatly increases the difficulty of processing this kind of material. For this kind of high-strength and poor-plasticity material, hot rolling is generally used for processing. The material is processed to the required thickness through hot rolling, and it has high strength and good formability.

[0004] At present, the conventional hot rolling of sheet materials is to directly put the material into the holding furnace for heating, and then clamp and roll it. This method is suitable for thick materials, while thin sheet materials are easy to stick together at high temperature. When the thin sheets are directly stacked together for heating, they stick to each other, which greatly increases the difficulty of clamping. If the thin sheets are completely spread out in the furnace for heating, the utilization rate of the heating furnace is lower. Therefore, thin sheets are usually staggered and stacked in the heating furnace. However, when the heating furnace is large, the sheets stacked on the inside of the heating furnace are difficult to be clamped because they are in an area with high furnace temperature and limited space. Therefore, the commonly used area of ​​the heating furnace is the area near the furnace mouth, and the inside of the heating furnace is usually idle, resulting in a low utilization rate of the heating furnace and a decrease in production efficiency. In addition, for the above-mentioned materials with thinner thickness, they are more sensitive to temperature during hot rolling than thicker materials. In batch production, in order to improve efficiency, multiple sheets of materials are usually placed in the holding furnace. During rolling, the process of continuously clamping materials from the furnace will inevitably cause the temperature of other sheets in the furnace to dissipate, which will lead to large differences in the thickness and performance of the materials rolled out of the same batch.

[0005] Conventional sheet rolling methods are suitable for thicker "blocks". For thinner sheets, the heating furnace utilization rate is low and the temperature dissipates quickly, resulting in low production efficiency and difficulty in ensuring quality uniformity. Therefore, it is urgent to design a convenient clamping loading tooling that can ensure the insulation effect and improve production efficiency. Utility Model Content

[0006] The main purpose of the utility model is to overcome the deficiencies in the prior art and to propose a convenient clamping loading tool for hot rolling of metal sheets. By placing the sheets into the loading tool, the utilization rate of the heating furnace can be greatly improved. At the same time, by designing the back plate of the tool into a slope, it is convenient to clamp the sheets, thereby greatly improving production efficiency. The tool also has a heat-insulating effect, which can slow down the temperature loss of other sheets in the furnace when clamping the materials, thereby ensuring quality uniformity while improving production efficiency.

[0007] In order to achieve the above objectives, the utility model provides the following technical solutions.

[0008] The utility model provides a convenient clamping loading tool for hot rolling of metal sheets, which comprises a tool body, wherein the tool body is a polyhedral structure and has an open accommodating cavity for accommodating the metal sheets;

[0009] The tooling body includes a bottom plate and a back plate, the back plate is arranged opposite to the opening of the accommodating cavity, and the bottom plate and the back plate are connected at a non-right angle, so that the multiple layers of metal sheets stacked on the bottom plate are arranged in a stepped manner under the inclined blocking action of the back plate.

[0010] Furthermore, the bottom plate is provided with steps for placing the metal sheet.

[0011] Furthermore, the width of the step is the same as the width of the bottom plate, and the width of the step is greater than the width of the metal sheet.

[0012] Furthermore, the width of the step is 2 to 5 cm greater than the width of the metal sheet.

[0013] Furthermore, the length of the step is shorter than the length of the bottom plate, and the length of the metal sheet is longer than the length of the step and shorter than the length of the bottom plate.

[0014] Furthermore, the back plate is connected to the bottom plate at an acute angle.

[0015] Furthermore, the tooling body also includes a cover plate and two side plates, the cover plate is arranged correspondingly to the bottom plate above and below, the two side plates are arranged on opposite sides of the cover plate and the bottom plate, and the cover plate, the bottom plate, the back plate and the two side plates together form the tooling body.

[0016] Furthermore, a plurality of through holes are provided on at least a portion of the panels of the tool body.

[0017] Furthermore, the diameter of the through hole is 20-60 mm.

[0018] Furthermore, a handle is provided on the tool body.

[0019] Compared with the prior art, the utility model achieves the following technical effects:

[0020] (1) In the present invention, the sheet material is placed in a tool and then placed in a heating furnace, thereby improving the utilization rate of the heating furnace. At the same time, the back plate of the tool is designed to be sloped to facilitate the clamping of the sheet material, thereby greatly improving production efficiency.

[0021] (2) In the present invention, the back plate of the tooling is designed to be sloped, and the bottom plate is designed to be stepped, which is more convenient for clamping the sheet material and greatly improves the production efficiency.

[0022] (3) In the present invention, placing the sheet material in the tooling can also play a role in heat preservation, which can effectively slow down the temperature loss of the remaining sheets in the furnace when the sheet material is clamped, thereby improving the quality uniformity of the rolled sheet material.

[0023] (4) The tooling structure of the utility model is simple, practical, can be used repeatedly, and can be applied to rolling thin sheet materials of different thicknesses.

[0024] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0026] Figure 1 It is a schematic structural diagram of a convenient clamping loading tool for hot rolling of metal sheets according to one embodiment or multiple embodiments.

[0027] Reference numerals:

[0028] 1. Cover plate; 2. Bottom plate; 2-1. Step; 3. Back plate; 4. Side plate; 5. Handle. DETAILED DESCRIPTION

[0029] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by technicians in the technical field to which the present invention belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] In the description of the embodiments of the present utility model, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0033] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0034] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 embodiments of the present utility model can be understood according to specific circumstances.

[0035] The utility model provides a Figure 1 The convenient clamping loading tool for hot rolling of metal sheets shown in the figure comprises a tool body, which has a polyhedral structure and has an open accommodating cavity for accommodating metal sheets; specifically, the tool body comprises a bottom plate 2 and a back plate 3, the back plate 3 is arranged opposite to the opening of the accommodating cavity, and the bottom plate 2 and the back plate 3 are connected at a non-right angle, so that the multiple layers of metal sheets stacked on the bottom plate 2 are arranged in a stepped manner under the inclined blocking action of the back plate 3.

[0036] In an embodiment of the utility model, the back plate 3 and the bottom plate 2 are connected together at a non-right angle, that is, the back plate 3 has a certain slope. When the metal sheets are stacked together and put into the tooling, due to the inclination and slope of the back plate 3, the neatly stacked metal sheets are blocked at the back plate 3 and become stepped and staggered. The closer the metal sheet is to the top cover plate 1 of the tooling, the more it protrudes toward the side away from the back plate 3, thereby facilitating clamping during rolling.

[0037] As an embodiment of the present invention, the back plate 3 is connected to the bottom plate 2 at an acute angle, the back plate 3 is inclined relative to the bottom plate 2, and the angle between the back plate 3 and the bottom plate 2 is in the range of 10 to 90° and is not 90°.

[0038] In the embodiment of the utility model, a step 2-1 is provided on the bottom plate 2 for placing the metal sheet. The bottom plate 2 is designed as a step structure to facilitate the clamping of the bottom metal sheet during rolling, wherein the height of the step 2-1 is related to the thickness of the metal sheet. If the metal sheet is thicker, the height of the step 2-1 is greater; if the metal sheet is thinner, the height of the step 2-1 is smaller.

[0039] As an implementation mode of the present invention, the width of the step 2 - 1 is the same as the width of the bottom plate 2 , and the width of the step 2 - 1 is greater than the width of the metal sheet.

[0040] As an implementation mode of the utility model, the length of the step 2-1 is smaller than the length of the bottom plate 2, and the length of the metal sheet is larger than the length of the step 2-1 and smaller than the length of the bottom plate 2, which is convenient for clamping the bottom metal sheet. The length of the step 2-1 can be designed according to actual needs.

[0041] As an implementation mode of the present invention, the width of the step 2 - 1 is 2 to 5 cm greater than the width of the metal sheet.

[0042] Exemplarily, the width of the step 2 - 1 is greater than the width of the metal sheet by 2 cm, 3 cm, 4 cm, 5 cm or any value within the above range.

[0043] In the embodiment of the utility model, the size of the tooling needs to be designed according to the size of the metal sheet. The width of the tooling can be 2 to 5 cm larger than the width of the metal sheet to facilitate the loading and clamping of the metal sheet during rolling. The height of the tooling can be designed according to the number of metal sheets. The higher the tooling is, the more metal sheets are loaded, and the corresponding tooling weight will also increase.

[0044] In an embodiment of the utility model, the tooling body also includes a cover plate 1 and two side plates 4. The cover plate 1 and the bottom plate 2 are arranged correspondingly up and down, and the two side plates 4 are arranged on the opposite sides of the cover plate 1 and the bottom plate 2. The cover plate 1, the bottom plate 2, the back plate 3 and the two side plates 4 together form the tooling body.

[0045] As an embodiment of the present invention, the cover plate 1 and the bottom plate 2 are arranged parallel to each other, and there is an inclination angle when the back plate 3 is connected to the cover plate 1 and the bottom plate 2. The angle between the back plate 3 and the bottom plate 2 is 10 to 90 degrees, and is not 90 degrees.

[0046] In the embodiment of the utility model, the cover plate 1, the bottom plate 2, the back plate 3 and the two protective side plates 4 are all made of stainless steel plates or other high-temperature resistant plates. The thickness of the plates used can be changed according to the heating temperature and the weight of the metal sheet. When the temperature rises and the weight of the metal sheet increases, the thickness of the plates used should increase accordingly.

[0047] In the embodiment of the utility model, the tool body is overall in a trapezoidal shape.

[0048] As an implementation mode of the present invention, both side plates 4 are approximately trapezoidal in shape, so as to be connected with the cover plate 1, the bottom plate 2 and the back plate 3 to form a whole.

[0049] As an implementation mode of the present utility model, both side plates 4 are integral solid plates, which have a heat-insulating effect and can withstand a certain force.

[0050] In an embodiment of the utility model, a plurality of through holes are provided on at least part of the panel of the tooling body to ensure that the metal sheet can be evenly heated in the heating furnace, while increasing the contact area between the metal sheet and the circulating hot air in the insulation furnace to improve the heating efficiency.

[0051] As an implementation mode of the present invention, the diameter of the through hole is in the range of 20 to 60 mm.

[0052] Exemplarily, the diameter of the through hole is one of 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm or any value satisfying the above range.

[0053] In the embodiment of the utility model, the distance between two adjacent through holes can be designed according to actual conditions. The hole distance is related to the thickness of the metal sheet. The thicker the metal sheet, the smaller the corresponding hole distance.

[0054] In an embodiment of the utility model, circular through holes with diameters ranging from 20 to 60 mm can be evenly distributed on the cover plate 1 to ensure that the metal sheet can be evenly heated in the heating furnace, while increasing the contact area between the metal sheet and the circulating hot air in the insulation furnace to improve the heating efficiency.

[0055] In the embodiment of the utility model, circular through holes with diameters ranging from 20 to 60 mm can be evenly distributed on the bottom plate 2 to ensure that the metal sheet can be heated evenly and at the same time improve the heating rate.

[0056] In the embodiment of the utility model, circular through holes with diameters ranging from 20 to 60 mm can be evenly distributed on the back plate 3 to ensure that the metal sheet can be heated evenly and at the same time improve the heating rate.

[0057] In the embodiment of the utility model, a handle 5 is provided on the tool body. The handle 5 is the key to the tool being able to move in the heat preservation furnace. By hooking the handle 5 with a long hook, the tool can be moved and aligned in the heat preservation furnace, which is convenient for clamping the metal sheet. At the same time, the tool should also be clamped or hooked by the handle 5 when entering and exiting the furnace, so as to avoid the situation of being burned by manually holding it into the furnace.

[0058] The handle 5 may be configured as a U-shaped handle.

[0059] As an implementation mode of the present utility model, the handle 5 is made of square or round pipe material and can be welded to the side plate 4 .

[0060] The convenient clamping loader for hot rolling of metal sheets provided in the utility model will be described in detail below through specific embodiments.

[0061] The aluminum-based composite material used in the embodiment is a particle-reinforced aluminum-based composite material, wherein the volume fraction of ceramic particles is 15 to 30%, and the types of ceramic particles are a composite of one or more of SiC, B4C, Al2O3, etc.; the aluminum matrix is ​​a 6xxx series aluminum alloy, a 7xxx series aluminum alloy, a 2xxx series aluminum alloy or a 5xxx series aluminum alloy.

[0062] Example 1

[0063] In Example 1, the Figure 1The loading tool shown in the figure uses 3mm thick stainless steel plates to make the tool cover 1, bottom plate 2, back plate 3 and two protective side plates 4 respectively, and uses hollow square steel with a size of 15×15mm to make the U-shaped handle 5; the cover plate 1 has a size of 250×150mm, and round through holes with a diameter of 30mm are evenly distributed on it, with a hole spacing of 40mm; the overall size of the bottom plate 2 is 250×350mm, and a stainless steel plate with a size of 250×250mm×3mm is used as a first step 2-1 and welded to the bottom plate 2, The height of step 2-1 is 3mm, and round through holes with a diameter of 20mm are evenly distributed on the entire bottom plate 2 and the step 2-1, with a hole spacing of 40mm; the size of the back plate 3 is 250×140mm, and the angle between the back plate 3 and the bottom plate 2 is 75°; the two protective side plates 4 are approximately trapezoidal, and their sizes match the cover plate 1, the bottom plate 2, and the back plate 3; the U-shaped handle 5 has a size of 100×35mm and is welded in the middle part of the two protective side plates 4; finally, the cover plate 1, the bottom plate 2, the back plate 3, and the two protective side plates 4 are connected into a whole by welding.

[0064] In Example 1, SiC ceramic particle reinforced aluminum-based composite material is used as the rolling test material, the volume fraction of SiC is 20%, the aluminum matrix is ​​6xxx series aluminum alloy, and the sheet size is 220×200×1mm; the working size of the heating furnace used is 600*600*800mm, divided into 4 layers; the mechanical properties of the material are tested using a WDW-100 electronic universal testing machine, and the detection method is GB / T228.1-2010.

[0065] When loading, each tool can hold about 50 pieces of aluminum-based composite materials with a size of 220×200×1mm, 4 tools can be placed on each layer, and 800 pieces of aluminum-based composite materials can be placed in each furnace; after each tool is clamped, the tool is removed, the furnace door is closed for insulation, and rolling continues after reaching the temperature. After one rolling, the thickness of the aluminum-based composite sheet in the heating furnace is reduced from 1mm to within the range of 0.8±0.015mm. The tensile strength of the material in the rolled state is 385±15MPa, the yield strength is 315±15MPa, and the elongation range is 4-6%.

[0066] Example 2

[0067] In Example 2, the same loading tooling as in Example 1 is used.

[0068] In Example 2, SiC ceramic particle reinforced aluminum-based composite material is used as the rolling test material, the volume fraction of SiC is 20%, the aluminum matrix is ​​6xxx series aluminum alloy, and the sheet size is 220×180×0.5mm; the working size of the heating furnace used is 600*600*800mm, divided into 4 layers; the mechanical properties of the material are tested using a WDW-100 electronic universal testing machine, and the detection method is GB / T228.1-2010.

[0069] When loading, each tool can hold about 100 pieces of aluminum-based composite materials with a size of 220×200×1mm, 4 tools can be placed on each layer, and 1,600 pieces of aluminum-based composite materials can be placed in each furnace; after each tool is clamped, the tool is removed, the furnace door is closed for insulation, and rolling continues after reaching the temperature. After one rolling, the thickness of the aluminum-based composite sheet in the heating furnace is reduced from 0.5mm to 0.4±0.015mm. The tensile strength of the material in the rolled state is 395±15MPa, the yield strength is 325±15MPa, and the elongation range is 3-5%.

[0070] At the same time, the utility model also designs a comparative example to better illustrate the convenient clamping loader for hot rolling of metal sheets.

[0071] Comparative Example 1

[0072] In the comparative example, no loading tooling was used, and the aluminum-based composite material sheets were directly placed on the layering rack of the heating furnace for heating, and then clamped and rolled.

[0073] In the comparative example, SiC ceramic particle reinforced aluminum-based composite material is used as the rolling test material, the volume fraction of SiC is 20%, the aluminum matrix is ​​6xxx series aluminum alloy, and the sheet size is 220×200×1mm; the working size of the heating furnace used is 600*600*800mm, divided into 4 layers; the mechanical properties of the material are tested using a WDW-100 electronic universal testing machine, and the detection method is GB / T228.1-2010.

[0074] Each layer of the heating furnace can hold 50 sheets, and each furnace can hold 200 sheets of aluminum-based composite materials; after each layer of material is clamped, the furnace door is closed for insulation, and rolling continues after reaching the temperature. After one rolling, the thickness of the aluminum-based composite material sheet in the heating furnace is reduced from 1mm to within the range of 0.8±0.025mm, and the tensile strength of the material in the rolled state is 390±30MPa, the yield strength is 325±25MPa, and the elongation range is 2-6%.

[0075] By comparison, it is found that under the same equipment and process conditions, compared with the use of the tooling described in the utility model, when the tooling is not used, the utilization rate of the holding furnace is only 25%, and as the thickness of the rolled sheet material decreases, the utilization rate of the holding furnace is even lower, resulting in reduced production efficiency; at the same time, when the tooling is not used, the thickness uniformity and performance uniformity of the rolled sheet material are also poor. This is because when the tooling is not used, the rolling temperature of the sheet material on the same furnace layer is quite different. When the first few sheets are rolled, the sheet material temperature is high, the deformation resistance is weak, the actual reduction is large, and the rolled sheet material is The strength is slightly lower and the elongation is higher. As the rolling continues, the furnace door is always in an open state, the temperature of the sheet in the furnace continues to decrease, the sheet's ability to resist deformation increases, the actual pressing amount becomes smaller, and the strength of the rolled sheet increases and the elongation decreases, ultimately resulting in poor uniformity of thickness and performance of the same batch of sheets. When the tooling described in the utility model is used, the tooling has a heat-insulating effect during rolling, which slows down the temperature loss of the sheet, thereby reducing the thickness and performance differences of the same batch of sheets, making the quality uniformity of the rolled sheet better than when the tooling is not used.

[0076] Compared with not using the tooling, when using the tooling described in the utility model, the thickness uniformity is improved as follows: the thickness fluctuation range when using the tooling is ±0.015mm, which is better than ±0.025mm when not using the tooling; the performance uniformity is improved as follows: the tensile strength fluctuation range when using the tooling is ±15MPa, which is better than ±30MPa when not using the tooling; the yield strength fluctuation range when using the tooling is ±15MPa, which is better than ±25MPa when not using the tooling; the elongation range when using the tooling is 4-6%, which is better than 2-6% when not using the tooling. The smaller the fluctuation range of the above performance, the better the performance uniformity.

[0077] The use of the tooling in the utility model can help to more conveniently and quickly clamp the sheet materials that need to be heated and kept warm during rolling, and it also has a good insulation effect. Compared with directly placing the sheet materials into the insulation furnace, using this tooling for loading can improve the utilization rate of the insulation furnace, thereby improving the production efficiency of hot rolling of the sheet materials.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it; although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and description of the utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A convenient clamping loading tool for hot rolling of metal sheets, characterized in that: It comprises a tool body, which is a polyhedral structure and has an open accommodating cavity for accommodating metal sheets; The tooling body includes a bottom plate and a back plate, the back plate is arranged opposite to the opening of the accommodating cavity, and the bottom plate and the back plate are connected at a non-right angle, so that the multiple layers of metal sheets stacked on the bottom plate are arranged in a stepped manner under the inclined blocking action of the back plate.

2. The convenient clamping loading tool for hot rolling of metal sheets according to claim 1, characterized in that: The bottom plate is provided with a step for placing the metal sheet.

3. The convenient clamping loading tool for hot rolling of metal sheets as claimed in claim 2, characterized in that: The width of the step is the same as the width of the bottom plate, and the width of the step is greater than the width of the metal sheet.

4. The convenient clamping loading tool for hot rolling of metal sheets according to claim 2 or 3, characterized in that: The width of the step is 2 to 5 cm greater than the width of the metal sheet.

5. The convenient clamping loading tool for hot rolling of metal sheets as claimed in claim 2, characterized in that: The length of the step is shorter than the length of the bottom plate, and the length of the metal sheet is longer than the length of the step and shorter than the length of the bottom plate.

6. The convenient clamping and loading tool for hot rolling of metal sheets according to claim 1, characterized in that: The back plate is connected to the bottom plate at an acute angle.

7. The convenient clamping loading tool for hot rolling of metal sheets according to claim 1, characterized in that: The tooling body also includes a cover plate and two side plates. The cover plate is arranged correspondingly to the bottom plate above and below, and the two side plates are arranged on opposite sides of the cover plate and the bottom plate. The cover plate, the bottom plate, the back plate and the two side plates together form the tooling body.

8. The convenient clamping loading tool for hot rolling of metal sheets according to claim 1 or 7, characterized in that: At least part of the panel of the tool body is provided with a plurality of through holes.

9. The convenient clamping loading tool for hot rolling of metal sheets as claimed in claim 8, characterized in that: The diameter of the through hole is 20-60 mm.

10. The convenient clamping and loading tool for hot rolling of metal sheets according to claim 1, characterized in that: The tool body is provided with a handle.

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