A heat treatment device for high boron low alloy high speed steel rolls

Abstract

This utility model relates to the field of high boron low alloy high-speed steel roll technology, and in particular to a heat treatment device for high boron low alloy high-speed steel rolls. The device includes a furnace body, an adjusting assembly at the top of the furnace body's inner cavity, and a heating assembly below the adjusting assembly. The adjusting assembly includes a five-star base frame, with a fixed column fixedly connected to the center of the top of the five-star base frame. The five-star base frame is fixedly installed on the top of the furnace body's inner cavity via the fixed column. A driving gear is provided on one side of the bottom of the five-star base frame, and a driven gear is rotatably connected to the center of the bottom of the five-star base frame. The driving gear and the driven gear are meshed. Movable support rods are movably inserted at each of the five corners of the five-star base frame, and adjusting arc plates are provided on the outer sides of the movable support rods. In this utility model, the position of the heating assembly can be adjusted according to different specifications of rolls, ensuring that the heating assembly provides uniform heating to the rolls of different specifications.

Description

Technical Field

[0001] This utility model relates to the field of high boron low alloy high speed steel roll technology, specifically a heat treatment device for high boron low alloy high speed steel roll. Background Technology

[0002] High-boron low-alloy high-speed steel rolls are a new generation of roll materials that use borides as the main hard phase and significantly reduce the content of expensive alloying elements such as tungsten, molybdenum, vanadium, and cobalt. By adding 2.5 to 3% boron, boron iron particles with high hardness and good thermal stability are formed in the steel, replacing the carbides in traditional high-speed steel. This retains the high strength and toughness of the martensitic matrix and significantly improves wear resistance and thermal fatigue resistance.

[0003] Due to the low amount of precious alloying elements and fewer casting defects, its production cost is 20-30% lower than that of traditional high-speed steel rolls, while its service life is increased by 3-6 times. It is widely used in the slitting stand and finished product stand of hot-rolled strip steel, bar and wire rod mills, significantly reducing chipping, spalling and roll breakage accidents, and improving the surface quality of rolled materials and the mill's operating rate.

[0004] High-boron low-alloy high-speed steel rolls require heat treatment to optimize their mechanical properties during processing. Currently, most furnaces use electric heating. However, due to the fixed position of the electric heating structure and the varying specifications of the rolls, it is difficult to ensure uniform heating of the rolls when facing different specifications. This can easily lead to temperature gradients on the rolls, making it difficult to guarantee the heat treatment effect. Therefore, a heat treatment device for high-boron low-alloy high-speed steel rolls is proposed to address the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a heat treatment device for high boron low alloy high-speed steel rolls to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A heat treatment device for high-boron low-alloy high-speed steel rolls includes a furnace body. An adjusting assembly is located at the top of the furnace body's inner cavity, and a heating assembly is located below the adjusting assembly. The adjusting assembly includes a five-star base frame. A fixing column is fixedly connected to the top center of the five-star base frame, and the five-star base frame is fixedly installed on the top of the furnace body's inner cavity via the fixing column. A driving gear is located on one side of the bottom of the five-star base frame, and a driven gear is rotatably connected to the bottom center of the five-star base frame. The driving gear and the driven gear are meshed. Movable support rods are movably inserted at each of the five corners of the five-star base frame, and adjusting arc plates are located on the outer sides of the movable support rods. Multiple hollow slots are formed on the driven gear.

[0008] As a further optimization of this utility model, the following features are provided: a drive motor is fixedly connected to the top of the furnace body, the drive motor is located directly above the drive gear, a transmission shaft is fixedly connected to the output end of the drive motor, and the bottom end of the transmission shaft passes through the top wall of the furnace body and the five-star base frame and is fixedly connected to the drive gear.

[0009] As a further optimization of this utility model, the bottom of each of the five corners of the five-star base frame is provided with a movable groove, and the bottom of the hollow groove is provided with a pin that matches the hollow groove and the movable groove, and the pin passes through the hollow groove and is fixedly connected to the bottom of the movable support rod.

[0010] As a further optimization of this utility model, the number of the five hollowed-out grooves is five, the five hollowed-out grooves are of the same specification, they are all arc-shaped, and the five hollowed-out grooves are spirally distributed.

[0011] As a further optimization of this utility model, the heating component includes five sets of arc-shaped supports. Each set of arc-shaped supports consists of multiple longitudinally equidistantly spaced arc-shaped supports. The uppermost arc-shaped support is matched and fixedly connected to the corresponding adjustable arc plate. The lowermost arc-shaped support is slidably connected to the bottom of the inner cavity of the furnace body.

[0012] As a further optimization of this utility model, multiple heating rods are provided between the longitudinally adjacent arc-shaped supports, and the multiple heating rods are distributed in an arc-shaped equidistant array to adapt to the curvature of the arc-shaped supports.

[0013] As a further optimization of this utility model, the heating rod includes a ceramic sleeve, the inner cavity of which is provided with a molybdenum wire, the molybdenum wire being arranged in a longitudinal spiral shape, and the inner wall of the ceramic sleeve having a spiral mounting groove in which the molybdenum wire is embedded.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the position of the heating component can be adjusted according to the different specifications of the rolls by the setting of the pitch adjustment component, so that the heating component can ensure that it provides a uniform heating effect to the rolls when facing rolls of different specifications. The setting of the heating component can provide a heating effect to the rolls, thereby performing heat treatment on the rolls, and its own heat radiation effect is good. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3This is a schematic diagram of the structure of the adjustable distance assembly and the heating assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the adjustable distance component of this utility model;

[0020] Figure 5 This is a schematic diagram of the upward structure of the adjustable distance component of this utility model;

[0021] Figure 6 This is a partial structural schematic diagram of the heating assembly of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the heating rod of this utility model;

[0023] Figure 8 This is an exploded view of the structure of the heating rod of this utility model.

[0024] In the diagram: 1. Furnace body; 2. Adjustable distance assembly; 21. Five-star base frame; 22. Drive gear; 23. Driven gear; 24. Movable support rod; 25. Adjustable distance arc plate; 26. Hollowed-out groove; 27. Drive motor; 28. Transmission shaft; 29. ​​Movable groove; 3. Heating assembly; 31. Arc-shaped bracket; 32. Heating rod; 321. Ceramic sleeve; 322. Molybdenum wire; 323. Mounting groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Please see Figures 1-8 This utility model provides a technical solution:

[0028] A heat treatment device for high boron low alloy high-speed steel rolls includes a furnace body 1. An adjusting component 2 is provided at the top of the inner cavity of the furnace body 1, and a heating component 3 is provided below the adjusting component 2. The adjusting component 2 includes a five-star base frame 21. A fixing column is fixedly connected to the top center of the five-star base frame 21, and the five-star base frame 21 is fixedly installed on the top of the inner cavity of the furnace body 1 through the fixing column. A driving gear 22 is provided on one side of the bottom of the five-star base frame 21, and a driven gear 23 is rotatably connected to the bottom center of the five-star base frame 21. The driving gear 22 and the driven gear 23 are meshed. Movable support rods 24 are movably inserted at each of the five corners of the five-star base frame 21. An adjusting arc plate 25 is provided on the outside of the movable support rod 24. Multiple hollow slots 26 are opened on the driven gear 23.

[0029] As a further implementation of this solution, a drive motor 27 is fixedly connected to the top of the furnace body 1. The drive motor 27 is located directly above the drive gear 22. The output end of the drive motor 27 is fixedly connected to a transmission shaft 28. The bottom end of the transmission shaft 28 passes through the top wall of the furnace body 1 and the five-star base 21 and is fixedly connected to the drive gear 22. In the above configuration, the drive motor 27 can drive the drive gear 22 through the transmission shaft 28, thereby providing driving force for the pitch adjustment assembly 2.

[0030] As a further implementation of this solution, each of the five corners of the five-star base frame 21 is provided with a movable groove 29. The bottom of the hollow groove 26 is provided with a pin that matches the hollow groove 26 and the movable groove 29. The pin passes through the hollow groove 26 and is fixedly connected to the bottom of the movable support rod 24. There are five hollow grooves 26, and the specifications of the five hollow grooves 26 are the same. They are all arc-shaped and spirally distributed. In the above arrangement, the pin can make the movable support rod 24 move in the hollow groove 26. While moving, the movable support rod 24 is limited by the movable groove 29, so that the movable support rod 24 moves in a straight line.

[0031] As a further implementation of this solution, the heating component 3 includes five sets of arc-shaped supports 31. Each set of arc-shaped supports 31 is arranged in multiple longitudinally equidistant intervals. The uppermost arc-shaped support 31 is matched and fixedly connected to the corresponding adjustable arc plate 25. The lowermost arc-shaped support 31 is slidably connected to the bottom of the inner cavity of the furnace body 1. In the above arrangement, the arc-shaped supports 31 can be moved synchronously when the adjustable arc plate 25 is adjusted in a straight line.

[0032] As a further implementation of this solution, multiple heating rods 32 are provided between longitudinally adjacent arc-shaped supports 31. The multiple heating rods 32 are arranged in an arc-shaped equidistant array to adapt to the curvature of the arc-shaped supports 31. The heating rods 32 include ceramic sleeves 321, and molybdenum wires 322 are provided in the inner cavity of the ceramic sleeves 321. The molybdenum wires 322 are arranged in a longitudinal spiral shape. A spiral mounting groove 323 is opened on the inner wall of the ceramic sleeves 321, and the molybdenum wires 322 are embedded in the mounting groove 323. In the above arrangement, the heating rods 32 can heat the rolls and have good thermal radiation effect.

[0033] Work process: First, the roll is placed inside the furnace body 1. Then, according to the actual specifications of the roll, the position of the heating component 3 needs to be adjusted by the pitch adjustment component 2 so that the heating component 3 can adapt to the specifications of the roll to achieve the best heating effect. During adjustment, the drive motor 27 is started. The drive motor 27 will drive the drive gear 22 at the bottom of the five-star base 21 to rotate through the transmission shaft 28. The rotation of the drive gear 22 will drive the driven gear 23 to rotate through meshing. The rotation of the driven gear 23 will cause the movable support rod 24 to move in the slot 26 through the pin shaft due to its own arc-shaped hollow groove 26. While moving, the movable support rod 24 will be limited by the movable groove 29, so that the movable support rod 24 will move linearly. The movable support rod 24 will extend or retract at the five corners of the five-star base 21, and at the same time drive the pitch adjustment arc plate 25 to move linearly. The pitch adjustment arc plate 25 will synchronously drive the arc support 31 in the heating component 3 to adjust its position.

[0034] After the heating component 3 is adjusted to the appropriate position, the arc-shaped bracket 31 and the heating rod 32 will surround the roll in an annular shape, and the roll will be heated by the heating rod 32. The mounting groove 323 can install the molybdenum wire 322 inside the ceramic sleeve 321. The spiral design can increase the length of the molybdenum wire 322 in a limited space, thereby increasing the heating power. The two ends of the molybdenum wire 322 are connected to the electrode through crimp terminals to ensure stable current conduction. The ceramic sleeve 321 is not only resistant to high temperature, but also can isolate the molybdenum wire 322 from the outside world, preventing the molybdenum wire 322 from being oxidized at high temperature, which greatly extends the service life of the molybdenum wire 322. At the same time, the insulation of the ceramic sleeve 321 ensures electrical safety and prevents current leakage.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat treatment apparatus for high-boron low-alloy high-speed steel rolls, comprising a furnace body (1), characterized in that: The furnace body (1) has an adjustable distance assembly (2) at the top of its inner cavity, and a heating assembly (3) is provided below the adjustable distance assembly (2). The adjustable distance assembly (2) includes a five-star base frame (21). A fixed column is fixedly connected to the top center of the five-star base frame (21), and the five-star base frame (21) is fixedly installed on the top of the inner cavity of the furnace body (1) through the fixed column. A drive gear (22) is provided on one side of the bottom of the five-star base frame (21), and a driven gear (23) is rotatably connected to the bottom center of the five-star base frame (21). The drive gear (22) and the driven gear (23) are meshed. Movable support rods (24) are movably inserted at the five corners of the five-star base frame (21). An adjustable distance arc plate (25) is provided on the outside of the movable support rod (24). Multiple hollow slots (26) are opened on the driven gear (23).

2. The heat treatment apparatus for high-boron low-alloy high-speed steel rolls according to claim 1, characterized in that: A drive motor (27) is fixedly connected to the top of the furnace body (1). The drive motor (27) is located directly above the drive gear (22). A transmission shaft (28) is fixedly connected to the output end of the drive motor (27). The bottom end of the transmission shaft (28) passes through the top wall of the furnace body (1) and the five-star base frame (21) and is fixedly connected to the drive gear (22).

3. The heat treatment apparatus of high boron low alloy high speed steel roller as claimed in claim 1 wherein: The five corners of the five-star base frame (21) are provided with movable slots (29). The bottom of the hollow slot (26) is provided with a pin that matches the hollow slot (26) and the movable slot (29). The pin passes through the hollow slot (26) and is fixedly connected to the bottom of the movable support rod (24).

4. The heat treatment apparatus for high-boron low-alloy high-speed steel roller according to claim 1, wherein: The number of the five hollowed-out grooves (26) is five. The five hollowed-out grooves (26) have the same specifications. They are all arc-shaped and the five hollowed-out grooves (26) are spirally distributed.

5. The heat treatment apparatus for high boron low alloy high speed steel roller according to claim 1, wherein: The heating component (3) includes five sets of arc-shaped supports (31). Each set of arc-shaped supports (31) consists of multiple longitudinally equidistantly spaced arc-shaped supports. The uppermost arc-shaped support (31) is matched and fixedly connected to the corresponding adjustable arc plate (25). The lowermost arc-shaped support (31) is slidably connected to the bottom of the inner cavity of the furnace body (1).

6. The heat treatment apparatus of high boron low alloy high speed steel roller as claimed in claim 5, wherein: Multiple heating rods (32) are provided between the longitudinally adjacent arc-shaped supports (31), and the multiple heating rods (32) are distributed in an arc-shaped equidistant array to adapt to the curvature of the arc-shaped supports (31).

7. The heat treatment apparatus of high boron low alloy high speed steel roller as claimed in claim 6, wherein: The heating rod (32) includes a ceramic sleeve (321), the inner cavity of which is provided with a molybdenum wire (322), the molybdenum wire (322) is arranged in a longitudinal spiral shape, and the inner wall of the ceramic sleeve (321) is provided with a spiral mounting groove (323), in which the molybdenum wire (322) is embedded.

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