Multi-stage heat treatment equipment applied to cold rolling roller manufacturing process

Abstract

The invention discloses multi-stage heat treatment equipment applied to a cold rolling roller manufacturing process, and relates to the technical field of cold rolling roller heat treatment, the multi-stage heat treatment equipment specifically comprises a vertical plate, symmetrical side plates are vertically arranged on the front side of the vertical plate, and a preheating assembly, a quenching assembly and a tempering assembly which are vertically arranged, 45-degree arranged and horizontally arranged respectively are mounted on the outer sides of the vertical plate and the side plates; according to the method, the preheating, quenching and tempering stages are changed according to the position of the cold-rolled roller, so that the preheating, quenching and tempering processes are integrally compounded to form continuous treatment, and on the basis, a multi-directional clamping and positioning effect can be provided for the cold-rolled roller by combining a multi-point supporting and clamping assembly; and through combination of the two, the purposes of continuous gradient temperature control and protective positioning transfer in the heat treatment technological process of the cold rolling roller can be achieved, and the phenomena of heat treatment deformation caused by uneven clamping force and cracking caused by uneven temperature are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment of cold rolling rollers, in particular to multi-stage heat treatment equipment applied to the manufacturing process of cold rolling rollers. Background Art

[0002] In the field of cold rolling roller manufacturing, the heat treatment process is the core link that determines the hardness, wear resistance and service life of the product. The heat treatment process mainly includes two main steps: quenching and tempering. Quenching is the process of heating the roller to a certain temperature and then rapidly cooling it to obtain high hardness and wear resistance. Common quenching methods include induction surface quenching and overall heating quenching. Tempering is to heat the quenched roller at a lower temperature for a period of time to eliminate internal stress and improve toughness and stability.

[0003] However, referring to the prior art (a manufacturing process for a high-strength rolling mill roll and a heat treatment device used in the manufacturing process with publication number CN111088416A), the process is designed in a segmented manner with independent processes, which results in increased energy consumption and decreased temperature control accuracy. Moreover, the traditional process uses a single quenching or a combination of simple normalizing and quenching, which lacks the ability to control gradient temperature and multi-stage phase transformation, resulting in uneven stress distribution within the material. In addition, during the heat treatment process of the cold rolling roll, conveyor rollers or lifting equipment are often used for transportation, which can easily cause sagging and deformation due to the weight of the cold rolling roll. To this end, this application proposes a solution, which is to use a segmented regional control method combined with a multi-point support form to jointly perform gradient temperature control to achieve continuous multi-stage heat treatment of cold rolling rollers. Summary of the Invention

[0004] The object of the present invention is to provide a multi-stage heat treatment device applied to the cold rolling roll manufacturing process, so as to solve the problems raised in the above background technology.

[0005] The object of the present invention can be achieved by the following technical solution: a multi-stage heat treatment equipment used in a cold rolling roll manufacturing process, comprising a vertical plate, a symmetrical side plate vertically arranged on the front side of the vertical plate, and a preheating assembly, a quenching assembly, and a tempering assembly respectively arranged vertically, at a 45-degree angle, and horizontally on the outer sides of the vertical plate and the side plate; The preheating assembly, quenching assembly and tempering assembly include matching right and left cone cylinders and upper cover cylinders, and the outer sides of the preheating assembly, quenching assembly and tempering assembly are all equipped with drive assemblies for opening and closing the right cone cylinder, the left cone cylinder and a pair of upper cover cylinders; The upper end of the vertical plate is hinged with a flip plate, and a top plate is installed on the upper side of the front end of the flip plate. A multi-point support clamping assembly is provided just below the top plate. The multi-point support clamping assembly includes a suspended movable ring and continuously arranged arc-shaped support plates, bottom rail frames and top rail frames. The arc-shaped support plates, bottom rail frames and top rail frames are used for multi-point support and covering of the rolling parts. An electric push rod is installed on the rear side of the vertical plate so as to be tilted, rotated and slidably. The output end of the electric push rod is rotationally connected to the rear side of the flip plate.

[0006] It is further configured as follows: the driving assembly includes cylinder 1 and cylinder 2, which are respectively arranged on the rib plate and the folding plate, the output end of cylinder 1 is connected to the outside of the right cone cylinder and the left cone cylinder, and the output end of cylinder 2 is connected to the top of the upper cover cylinder.

[0007] It is further configured that the right cone cylinder and the left cone cylinder perform horizontal reciprocating motion, and the upper cover cylinder performs inclined reciprocating motion to load and unload the roll parts.

[0008] It is further configured as follows: each of the top rail frames is rotatably set at the upper end of the arc-shaped support plate and fits with the upper end of the rolling element, each of the bottom rail frames is rotatably set at the lower end of the arc-shaped support plate and fits with the bottom end of the rolling element, and the arc-shaped support plate fits with the outer side of the rolling element.

[0009] It is further configured as follows: the right cone cylinder, the left cone cylinder and a pair of upper cover cylinders together constitute a heat treatment chamber, and the outer sides of the arc-shaped support plate, the bottom rail frame and the top rail frame are in contact with the inner wall of the heat treatment chamber.

[0010] It is further configured as follows: a connecting plate connected to the top railing is installed at the lower end of the movable ring, a screw rod is spirally installed in the middle of the movable ring, a rotating rod is connected to the upper end of the screw rod, and an inlet and outlet assembly driven by the rotating rod is installed on the top plate.

[0011] It is further configured as follows: the feed and discharge assembly includes guide arc rods arranged on both sides of the upper end of the movable ring, the guide arc rods are vertically slidably connected to the top plate, a motor with the output end facing upward is installed on the top plate, and the motor is driven and connected to the rotating rod through a gear transmission assembly.

[0012] The present invention has the following beneficial effects: 1. The present invention addresses the problems of lack of gradient temperature control and multi-stage phase change control capabilities, as well as sagging deformation caused by the deadweight of the cold rolling roll. It mainly improves the displacement structure of each stage of heat treatment. Specifically, it performs positional displacement actions on the cold rolling roll during the preheating, quenching and tempering stages, thereby combining the preheating, quenching and tempering processes into a continuous process. On this basis, it can also combine with a multi-point support clamping assembly to provide a multi-directional clamping and positioning effect for the cold rolling roll, thereby avoiding deformation caused by the deadweight of the cold rolling roll during the transportation process of the heat treatment. The combination of the two can achieve the purpose of continuous gradient temperature control and protective positioning and transportation in the heat treatment process of the cold rolling roll, thereby avoiding deformation during heat treatment due to uneven clamping force and cracking caused by uneven temperature. 2. When performing the position shifting operation for each stage of the heat treatment of the cold rolling roll, the electric push rod is used to drive the turning plate to deflect, and during the deflection, the cold rolling roll can be driven to deflect from the initial position to end points of 45° and 90°. Among them, after the 45° deflection, the cold rolling roll is located in the quenching assembly, and after the 90° deflection, the cold rolling roll is located in the tempering assembly. After the deflection is completed, the right cone cylinder, the left cone cylinder and a pair of upper cover cylinders are closed under the driving effect of the drive assembly, completing the current heat treatment process; 3. When loading is completed, the bottom rail and the top rail are located at the bottom and top of the heat treatment chamber respectively, and the multi-point support effect of the arc-shaped support plate attached to the side wall of the heat treatment chamber can stably control the thermal deformation and avoid the heat treatment deformation caused by uneven clamping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the installation structure of the preheating assembly of the present invention; Figure 3 is a front cross-sectional view of the preheating assembly of the present invention; Figure 4 This is a schematic diagram of the cold rolling roller placement of the present invention; Figure 5 is a side sectional view of the present invention; Figure 6 This is a schematic diagram of the structural breakdown of the multi-point support clamping assembly of the present invention; Figure 7This is a schematic diagram of the structural breakdown of the preheating component, quenching component and tempering component of the present invention; Figure 8 It is a structural schematic diagram of the material inlet and outlet components of the present invention.

[0015] In the figure: 1. Vertical plate; 101. Roller; 2. Turning plate; 3. Side plate; 4. Top plate; 5. Preheating assembly; 6. Quenching assembly; 7. Tempering assembly; 8. Mounting plate; 9. Cylinder 1; 10. Cylinder 2; 11. Rib plate; 12. Folding plate; 13. Right cone; 14. Left cone; 15. Upper cover; 16. Moving ring; 17. Arc support plate; 18. Bottom rail frame; 19. Top rail frame; 20. Connecting plate; 21. Heat treatment chamber; 22. Electric push rod; 23. Motor; 24. Rotating rod; 25. Screw rod; 26. Guide arc rod. DETAILED DESCRIPTION

[0016] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Example 1: To address the problems of lack of gradient temperature control and multi-stage phase change control capabilities and sagging deformation caused by the weight of the cold rolling roll, the following technical solutions are proposed: Reference Figures 1-8 As shown, the multi-stage heat treatment equipment used in the cold rolling roll manufacturing process in this embodiment includes a vertical plate 1, a symmetrical side plate 3 is vertically arranged on the front side of the vertical plate 1, and a preheating assembly 5, a quenching assembly 6 and a tempering assembly 7 are installed on the outer sides of the vertical plate 1 and the side plates 3, which are respectively arranged vertically, at a 45-degree angle and horizontally; The preheating assembly 5, the quenching assembly 6 and the tempering assembly 7 include a matching right cone 13 and a left cone 14 and an upper cover 15. Evenly distributed medium frequency or power frequency induction heating elements are embedded in the right cone 13, the left cone 14 and the upper cover 15, and cooling elements are synchronously arranged to provide a rapid cooling effect after quenching. Since the above-mentioned heating elements and cooling elements are all prior art, they are not described here. The outer sides of the preheating assembly 5, the quenching assembly 6 and the tempering assembly 7 are all equipped with a drive assembly for opening and closing the right cone 13, the left cone 14 and a pair of upper covers 15; The upper end of the vertical plate 1 is hingedly connected to a flip plate 2, and a top plate 4 is installed on the upper side of the front end of the flip plate 2. A multi-point support and clamping assembly is set directly below the top plate 4. The multi-point support and clamping assembly includes a suspended movable ring 16 and continuously arranged arc-shaped support plates 17, bottom rails 18 and top rails 19. The arc-shaped support plates 17, bottom rails 18 and top rails 19 are used for multi-point support and covering of the rolling element 101. The right conical cylinder 13 , the left conical cylinder 14 and the pair of upper cover cylinders 15 together form a heat treatment chamber 21 .

[0018] Basic Principle: The present invention is similar to the prior art heat treatment process for cold rolling rolls, with the main focus on improving the displacement structure of each heat treatment stage. Specifically, the position of the cold rolling rolls is shifted during the preheating, quenching, and tempering stages, thereby combining the preheating, quenching, and tempering processes into a continuous process. On this basis, it is also possible to combine the multi-point support clamping assembly to provide a multi-directional clamping and positioning effect for the cold rolling roll, thereby avoiding deformation caused by the deadweight of the cold rolling roll to be heat treated during transportation. The combination of the two can achieve the purpose of continuous gradient temperature control and protective positioning and transportation in the heat treatment process of the cold rolling roll, thereby avoiding deformation during heat treatment due to uneven clamping force and cracking caused by uneven temperature. It should be noted here that: when performing the displacement operation for each stage of the heat treatment of the cold rolling roller, the electric push rod 22 is used to drive the turning plate 2 to deflect, and during the deflection, the cold rolling roller can be driven to deflect from the initial position to end points of 45° and 90°, wherein, after the 45° deflection, the cold rolling roller is located in the quenching assembly 6, and after the 90° deflection, the cold rolling roller is located in the tempering assembly 7, and after the deflection is completed, the right cone 13, the left cone 14 and the pair of upper cover cylinders 15 are closed under the driving effect of the drive assembly, completing the current heat treatment process; For this purpose, an electric push rod 22 is installed on the rear side of the additional plate 1 so as to tilt and rotate and slide. The output end of the electric push rod 22 is rotatably connected to the rear side of the flip plate 2. The driving assembly includes a cylinder 9 and a cylinder 2 10 respectively arranged on the rib plate 11 and the folding plate 12. The output end of the cylinder 1 9 is connected to the outer sides of the right cone 13 and the left cone 14, and the output end of the cylinder 2 10 is connected to the top of the upper cover 15. The right cone 13 and the left cone 14 move horizontally back and forth, and the upper cover 15 moves tilted back and forth to load and unload the roll 101. It should be noted again that: for the displacement operation process of each stage of the heat treatment of the cold rolling roller, the movement process of the preheating component 5, the quenching component 6 and the tempering component 7 during the loading and unloading of the cold rolling roller is as follows: when the cold rolling roller of the previous step moves to the next step, cylinder 1 9 and cylinder 2 10 are started and respectively drive the right cone 13, the left cone 14 and a pair of upper cover cylinders 15 to move toward each other, then the preheating component 5, the quenching component 6 and the tempering component 7 are separated into two parts to expose the heat treatment chamber 21, and are immediately closed after the loading of the cold rolling roller is completed to form a sealed environment.

[0019] Embodiment 2: The multi-stage heat treatment equipment used in the cold rolling roll manufacturing process in this embodiment also includes: Each top rail frame 19 is rotatably provided at the upper end of the arc-shaped support plate 17 and fits with the upper end of the rolling element 101. Each bottom rail frame 18 is rotatably provided at the lower end of the arc-shaped support plate 17 and fits with the bottom end of the rolling element 101. Both the top rail frame 19 and the bottom rail frame 18 are detachable structures. The arc-shaped support plate 17 fits with the outer side of the rolling element 101. The outer sides of the arc-shaped support plate 17, the bottom rail frame 18 and the top rail frame 19 fit with the inner wall of the heat treatment chamber 21. The lower end of the movable ring 16 is provided with a connecting plate 20 connected to the top rail 19, the middle part of the movable ring 16 is spirally provided with a screw rod 25, the upper end of the screw rod 25 is connected to a rotating rod 24, and the top plate 4 is provided with an inlet and outlet assembly driven by the rotating rod 24; The feeding and discharging components include guide arc rods 26 arranged on both sides of the upper end of the movable ring 16. The guide arc rods 26 are vertically slidably connected to the top plate 4. A motor 23 with the output end facing upward is installed on the top plate 4. The motor 23 is driven and connected to the rotating rod 24 through a gear transmission assembly.

[0020] Reference Figure 6 and Figure 8 As shown in the figure, the multi-point support process during the heat treatment of the cold rolling roll is as follows: Loading operation: Since the bottom rail frame 18 and the top rail frame 19 are rotatably connected to the arc-shaped support plate 17 and are designed to be detachable, that is to say, the number of the arc-shaped support plates 17 is at least 3. When the number of the arc-shaped support plates 17 is 3, the arc-shaped support plates 17 can rotate, and when two adjacent arc-shaped support plates 17 are in a parallel state, they can just pass through one cold rolling roller to complete the loading. When the number of the arc-shaped support plates 17 exceeds 3, at least one of the arc-shaped support plates 17 needs to be disassembled before the cold rolling roller can be loaded, thereby forming a multi-point support effect in combination with the bottom rail frame 18 and the top rail frame 19; Loading process: After the cold rolling rollers are loaded, the motor 23 is started, and the screw 25 is driven to rotate through the gear transmission assembly, while the movable ring 16 moves downward outside the screw 25, thereby driving the cold rolling rollers positioned by the multi-point support structure to be loaded into the preheating assembly 5. When loading is completed, the bottom rail 18 and the top rail 19 are located at the bottom and top of the heat treatment chamber respectively, and the multi-point support effect of the arc support plate 17 attached to the side wall of the heat treatment chamber ensures stable thermal deformation control, thereby avoiding thermal deformation caused by uneven clamping force. During unloading: after the heat treatment is completed, the above-mentioned cold rolling roller loading process is reversed, and the electric push rod 22 drives the turning plate 2 to reset, completing the unloading of the cold rolling roller after the heat treatment.

[0021] Embodiment 3: This embodiment combines Embodiment 1 and Embodiment 2 to form a multi-stage heat treatment method applied to the cold rolling roller manufacturing process, including the following steps: S1: When the number of the arc-shaped support plates 17 is 3, the arc-shaped support plates 17 can rotate, and when two adjacent arc-shaped support plates 17 are in a parallel state, they can just pass through one cold rolling roller to complete the loading. When the number of the arc-shaped support plates 17 exceeds 3, at least one of the arc-shaped support plates 17 needs to be disassembled before the cold rolling roller can be loaded, thereby forming a multi-point support effect in combination with the bottom rail frame 18 and the top rail frame 19; S2: After the cold rolling rolls are loaded, the motor 23 is started, and the screw 25 is driven to rotate through the gear transmission assembly, while the movable ring 16 moves downward outside the screw 25, thereby driving the cold rolling rolls positioned by the multi-point support structure to be loaded into the preheating assembly 5; S3: The electric push rod 22 drives the flip plate 2 to deflect, and during the deflection, it can drive the cold rolling roller to deflect from the initial position to end points of 45° and 90°. Among them, after the 45° deflection, the cold rolling roller is located in the quenching assembly 6, and after the 90° deflection, the cold rolling roller is located in the tempering assembly 7. After the deflection is completed, the right cone cylinder 13, the left cone cylinder 14 and the pair of upper cover cylinders 15 are closed under the driving effect of the driving assembly, completing the current heat treatment process; S4: After the heat treatment is completed, the above-mentioned cold rolling roller loading process is reversed, and the electric push rod 22 drives the turning plate 2 to reset, completing the unloading of the cold rolling roller after the heat treatment.

[0022] In summary: the position of the cold rolling roll is changed during the preheating, quenching and tempering stages, so that the preheating, quenching and tempering processes are combined as a whole to form a continuous treatment. On this basis, the multi-point support clamping assembly can be combined to provide a multi-directional clamping and positioning effect for the cold rolling roll, so as to avoid the deformation caused by the dead weight during the transportation process of the cold rolling roll to be heat treated. The combination of the two can achieve the purpose of continuous gradient temperature control and protective positioning and transportation in the heat treatment process of the cold rolling roll, and avoid the phenomenon of heat treatment deformation caused by uneven clamping force and cracking caused by uneven temperature.

[0023] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A multi-stage heat treatment device for a cold rolling mill roll manufacturing process, comprising a vertical plate (1), characterized in that: Symmetrical side panels (3) are vertically arranged on the front side of the vertical panel (1), and preheating components (5), quenching components (6) and tempering components (7) are installed on the outer sides of the vertical panel (1) and the side panels (3), which are respectively arranged vertically, at a 45-degree angle and horizontally. The preheating assembly (5), quenching assembly (6) and tempering assembly (7) comprise a matching right cone cylinder (13), a left cone cylinder (14) and an upper cover cylinder (15); and a driving assembly for opening and closing the right cone cylinder (13), the left cone cylinder (14) and a pair of upper cover cylinders (15) is installed on the outer sides of the preheating assembly (5), the quenching assembly (6) and the tempering assembly (7); The upper end of the vertical plate (1) is hinged with a flip plate (2), and a top plate (4) is installed on the upper side of the front end of the flip plate (2). A multi-point support clamping assembly is provided directly below the top plate (4); the multi-point support clamping assembly includes a suspended movable ring (16) and continuously provided arc-shaped support plates (17), bottom rail frames (18) and top rail frames (19), and the arc-shaped support plates (17), bottom rail frames (18) and top rail frames (19) are used for multi-point support and covering of the rolling element (101); An electric push rod (22) is installed on the rear side of the vertical plate (1) in a tilting and sliding manner, and the output end of the electric push rod (22) is rotationally connected to the rear side of the flip plate (2).

2. The multi-stage heat treatment equipment for cold rolling roll manufacturing process according to claim 1, characterized in that: The driving assembly includes a cylinder 1 (9) and a cylinder 2 (10) respectively arranged on the rib plate (11) and the folding plate (12), wherein the output end of the cylinder 1 (9) is connected to the outer sides of the right cone cylinder (13) and the left cone cylinder (14), and the output end of the cylinder 2 (10) is connected to the top of the upper cover cylinder (15).

3. The multi-stage heat treatment equipment for cold rolling roll manufacturing process according to claim 2, characterized in that: The right cone cylinder (13) and the left cone cylinder (14) perform horizontal reciprocating movements, while the upper cover cylinder (15) performs inclined reciprocating movements to load and unload the roll member (101).

4. The multi-stage heat treatment equipment for cold rolling roll manufacturing process according to claim 1, characterized in that: Each of the top rail frames (19) is rotatably arranged at the upper end of the arc-shaped support plate (17) and fits with the upper end of the rolling element (101), and each of the bottom rail frames (18) is rotatably arranged at the lower end of the arc-shaped support plate (17) and fits with the bottom end of the rolling element (101), and the arc-shaped support plate (17) fits with the outer side of the rolling element (101).

5. The multi-stage heat treatment equipment for cold rolling roll manufacturing process according to claim 4, characterized in that: The right cone (13), the left cone (14) and the pair of upper cover cylinders (15) together form a heat treatment chamber (21), and the outer sides of the arc-shaped support plate (17), the bottom rail frame (18) and the top rail frame (19) are in contact with the inner wall of the heat treatment chamber (21).

6. The multi-stage heat treatment equipment for cold rolling roll manufacturing process according to claim 5, characterized in that: The lower end of the movable ring (16) is provided with a connecting plate (20) connected to the top rail frame (19), the middle part of the movable ring (16) is spirally provided with a screw rod (25), the upper end of the screw rod (25) is connected to a rotating rod (24), and the top plate (4) is provided with an inlet and outlet assembly drivingly connected to the rotating rod (24).

7. The multi-stage heat treatment equipment for cold rolling roll manufacturing process according to claim 6, characterized in that: The feeding and discharging assembly includes guide arc rods (26) arranged on both sides of the upper end of the moving ring (16), the guide arc rods (26) are vertically slidably connected to the top plate (4), and a motor (23) with an output end facing upward is installed on the top plate (4), and the motor (23) is driven and connected to the rotating rod (24) through a gear transmission assembly.

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