Trimming method of crystallization wheel

Abstract

The invention belongs to the technical field of continuous rolling and continuous casting equipment, and discloses a dressing method of a crystallization wheel, which comprises the following steps: grinding the peripheral surface of the crystallization wheel until the opening width D1 of a casting groove of the crystallization wheel reaches 63mm; the bottom face of the casting groove is polished till the depth D2 of the casting groove reaches 44 mm; the side wall of the casting groove is polished, and the included angle between the side wall of the casting groove and the bottom face of the casting groove is kept at 102 degrees till the width D3 of the bottom face of the casting groove reaches 44 mm; and grinding the joint of the bottom surface of the casting groove and the side wall of the casting groove to form an arc chamfer. According to the dressing method of the crystallization wheel, the abraded crystallization wheel can be dressed, the dressed crystallization wheel can be continuously used in continuous rolling and continuous casting equipment, the service life of the single crystallization wheel is prolonged, resource waste is reduced, and meanwhile the production cost of metal is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of continuous rolling and continuous casting equipment, and in particular to a crystallization wheel dressing method. Background Art

[0002] The crystallization wheel is a key component in continuous rolling and casting equipment that solidifies and shapes molten metal. It is typically made of chromium-zirconium-copper. Because the crystallization wheel operates at high temperatures of 500°C-1000°C for a period of time, its surface wear and tear can alter the shape of the casting trough, affecting the dimensions of the formed metal and, in turn, the subsequent rolling process.

[0003] Normally, the crystallization wheel in continuous rolling and casting equipment needs to be replaced after forming 3,000 tons of metal. Currently, the replaced crystallization wheel is scrapped. The high procurement cost of the crystallization wheel not only results in a large waste of resources, but also makes the production cost of metal too high.

[0004] Therefore, a method for trimming a crystallization wheel is urgently needed to solve the above technical problems. Summary of the Invention

[0005] The object of the present invention is to provide a crystallization wheel dressing method, which can dress a worn crystallization wheel, and the dressed crystallization wheel can continue to be used in continuous rolling and continuous casting equipment, thereby extending the service life of a single crystallization wheel, reducing resource waste, and reducing metal production costs.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A crystallization wheel dressing method is used to dress a worn crystallization wheel, the crystallization wheel dressing method comprising:

[0008] Grinding the outer peripheral surface of the crystallization wheel until the casting groove opening width D1 of the crystallization wheel reaches 63 mm;

[0009] Grinding the bottom surface of the casting trough until the depth D2 of the casting trough reaches 44 mm;

[0010] Grinding the sidewall of the casting trough to maintain an angle of 102° between the sidewall of the casting trough and the bottom surface of the casting trough until the width D3 of the bottom surface of the casting trough reaches 44 mm;

[0011] The connection between the bottom surface of the casting trough and the side wall of the casting trough is polished to form an arc chamfer.

[0012] As an optimal technical solution for the crystallization wheel dressing method, the crystallization wheel is placed on a rotating mechanism, and the rotating mechanism is configured to drive the crystallization wheel to rotate. When grinding the outer peripheral surface of the crystallization wheel, the opening width and diameter of the casting groove in the crystallization wheel are first measured. According to the required casting groove opening value, the diameter reduction value of the crystallization wheel is calculated and recorded as a1. Then, the crystallization wheel is ground using a grinding device.

[0013] As an optimal technical solution for the crystallization wheel dressing method, a grinding device is placed on one side of the circumference of the crystallization wheel, and the cutter head is made to fit the circumference of the crystallization wheel. When the rotating mechanism drives the crystallization wheel to rotate, it controls the cutter head to move a distance a1 toward the center of the crystallization wheel.

[0014] As an optimal technical solution for the crystallization wheel trimming method, the cutter head approaches the center of the crystallization wheel twice, the first time approaching the distance of 1mm-0.02mm to perform rough processing on the circumference of the crystallization wheel, and the second time approaching the distance of 0.02mm to perform fine processing on the circumference of the crystallization wheel.

[0015] As a preferred technical solution for the crystallization wheel dressing method, after the outer peripheral surface of the crystallization wheel is processed, the casting groove depth of the crystallization wheel is measured. According to the standard casting groove depth, the depth value of the casting groove of the crystallization wheel that needs to be polished is calculated and recorded as a2. The direction of the cutter head of the grinding equipment is adjusted so that the cutter head is in contact with the bottom surface of the casting groove of the crystallization wheel, and the cutter head is controlled to move a distance a2 toward the center of the crystallization wheel.

[0016] As an optimal technical solution for the crystallization wheel trimming method, the cutter head approaches the center of the crystallization wheel twice, the first time approaching the distance of a2mm-0.02mm to rough-process the casting groove of the crystallization wheel, and the second time approaching the distance of 0.02mm to fine-process the casting groove of the crystallization wheel.

[0017] As a preferred technical solution of the crystallization wheel dressing method, the arc chamfer is formed by grinding with an arc chamfering machine.

[0018] As a preferred technical solution of the crystallization wheel trimming method, the radius of the arc chamfer is 10 mm.

[0019] As a preferred technical solution of the crystallization wheel dressing method, after the arc chamfering is completed, a scanning device is used to scan the crystallization wheel to determine whether the crystallization wheel has cracks and damage.

[0020] As a preferred technical solution for the crystallization wheel dressing method, metal powder and laser beam are synchronously sprayed toward the cracked and damaged areas through a coaxial powder feeding device, and the cracked and damaged areas of the crystallization wheel are reconstructed layer by layer by cladding.

[0021] The beneficial effects of the present invention are:

[0022] The crystallization wheel trimming method provided in this embodiment grinds the outer circumference of the worn crystallization wheel to make the opening width of the crystallization wheel reach the standard size, then grinds the bottom surface of the casting groove of the crystallization wheel to make the depth of the casting groove reach the standard size, thereby solving the problem of reduced casting groove depth after grinding the outer circumference of the crystallization wheel. Then, the sidewalls of the casting groove are grinded to solve the problem of increased angle between the sidewalls of the casting groove and its bottom surface after the crystallization wheel is worn, so that the angle between the two is at a required angle. At the same time, the width of the casting groove bottom surface is monitored until the width of the casting groove bottom surface reaches the standard size of 44 mm, so that the casting groove size of the crystallization wheel after grinding meets the standard size. Then, the connection between the sidewalls of the casting groove and the casting groove is grinded to form an arc chamfer, thus completing the trimming of the worn crystallization wheel. After trimming, the diameter of the crystallization wheel is within the tolerance range, the size of the casting groove meets the standard, and it can continue to be installed on the continuous rolling and continuous casting equipment for use, extending the service life of the single crystallization wheel, reducing the waste of crystallization wheel resources, and reducing the production cost of metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 1 is a flow chart of a method for trimming a crystallization wheel provided by the present invention;

[0024] Figure 2 It is a partial cross-sectional schematic diagram of the crystallization wheel provided by the present invention.

[0025] In the picture:

[0026] 1. Crystallization wheel; 11. Casting trough. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0028] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0031] This embodiment provides a crystallization wheel dressing method for dressing a worn crystallization wheel so that the dressed crystallization wheel can continue to be used in continuous rolling and continuous casting equipment, thereby extending the service life of a single crystallization wheel, reducing resource waste and lowering metal production costs.

[0032] like Figure 1 and Figure 2 As shown, the method for trimming the crystallization wheel 1 includes the following steps:

[0033] The outer peripheral surface of the crystallization wheel 1 is ground until the opening width D1 of the casting groove 11 of the crystallization wheel 1 reaches 63 mm. Among them, the casting groove 11 of the standard crystallization wheel 1 is an inverted trapezoid with a top opening width of 63 mm. After the standard crystallization wheel 1 has been used for a period of time, it will be worn. The opening width of the casting groove 11 in the worn crystallization wheel 1 will increase to 65 mm, thereby affecting the size of the metal forming and affecting subsequent processing. Therefore, by grinding the outer peripheral surface of the crystallization wheel 1, the diameter of the crystallization wheel 1 will be reduced, and the opening width of the casting groove 11 can be reduced from 65 mm before grinding to 63 mm, thereby reaching the standard size. Among them, the diameter size of the standard crystallization wheel 1 used in the continuous rolling and continuous casting equipment is allowed to have a tolerance of 2 mm to 4 mm. Therefore, when grinding the crystallization wheel 1, the staff will operate within the error allowed by the diameter range to ensure that the trimmed crystallization wheel 1 can be used on the continuous rolling and continuous casting equipment.

[0034] Grind the bottom surface of the casting groove 11 until the depth D2 of the casting groove 11 reaches 44mm. After the staff grinds the outer peripheral surface of the crystallization wheel 1, the diameter of the crystallization wheel 1 decreases, and the depth of the casting groove 11 will also decrease accordingly. The depth of the casting groove 11 in the standard crystallization wheel 1 used in the continuous rolling and continuous casting equipment is 44mm. Therefore, after the crystallization wheel 1 completes the grinding process of the outer peripheral surface, it is necessary to grind the bottom surface of the casting groove 11 until the depth of the casting groove 11 reaches the standard depth of 44mm to ensure that the depth of the casting groove 11 of the trimmed crystallization wheel 1 meets the use requirements.

[0035] The side walls of the casting groove 11 are polished so that the angle between the side walls of the casting groove 11 and the bottom surface of the casting groove 11 is maintained at 102°, until the width D3 of the bottom surface of the casting groove 11 reaches 44 mm. Among them, the standard value of the bottom surface width of the casting groove 11 in the standard crystallization wheel 1 used in the continuous rolling and continuous casting equipment is 44 mm. When the staff polishes the depth of the casting groove 11 of the crystallization wheel 1 with the ground outer surface to 44 mm, the opening width of the bottom surface of the casting groove 11 of the crystallization wheel 1 will be correspondingly reduced to less than the standard value of 44 mm. At the same time, after the standard crystallization wheel 1 is worn, the angle between the side walls of the casting groove 11 and its bottom surface will become larger, which will cause the opening size of the casting groove 11 to become larger. Therefore, when grinding the side wall of the casting trough 11, it is necessary not only to trim the angle between the side wall of the casting trough 11 and its bottom surface so that the angle between the two remains at 102°, but also to ensure that the bottom width of the casting trough 11 reaches the standard value of 44 mm, so as to ensure that the trimmed crystallization wheel 1 can continue to be used in the continuous rolling and continuous casting equipment.

[0036] The connection between the bottom surface and the side wall is polished to form a circular chamfer. After the staff completes the polishing of the side wall of the casting trough 11, the circular chamfer of the casting trough 11 in the crystallization wheel 1 will be deformed or even completely polished off. Therefore, after the shape and size of the casting trough 11 meet the standard requirements, it is necessary to polish and form a new circular chamfer at the connection between the bottom surface of the casting trough 11 and the side wall of the casting trough 11. The design of the circular chamfer is mainly to avoid stress concentration at the sharp points of the solidification casting and reduce the risk of cracks and fractures in the solidification casting. At the same time, it makes the metal solution smooth during the filling process, thereby improving the molding quality of the casting.

[0037] The trimming method of the crystallization wheel 1 provided in this embodiment grinds the outer peripheral surface of the worn crystallization wheel 1 so that the opening width of the casting groove 11 in the crystallization wheel 1 reaches the standard size, and then grinds the bottom surface of the casting groove 11 of the crystallization wheel 1 so that the depth of the casting groove 11 reaches the standard size, so as to solve the problem that the depth of the casting groove 11 is reduced after the outer peripheral surface of the crystallization wheel 1 is grinded. Then, the side wall of the casting groove 11 is grinded to solve the problem that the angle between the side wall of the casting groove 11 and its bottom surface becomes larger after the standard crystallization wheel 1 is worn, so that the angle between the two is at a required angle, and at the same time, the width of the bottom surface of the casting groove 11 is monitored until the width of the bottom surface of the casting groove 11 reaches the standard size of 44 mm, so that the size of the casting groove 11 of the trimmed crystallization wheel 1 meets the standard size, and then the connection between the side wall of the casting groove 11 and the bottom surface of the casting groove 11 is grinded to form a new arc chamfer, thereby completing the trimming of the worn crystallization wheel 1. After the repair, the diameter of the crystallization wheel 1 is within the tolerance range, and the size of the casting trough 11 meets the standard. It can continue to be installed on the continuous rolling and continuous casting equipment for use, extending the service life of the single crystallization wheel 1, reducing the waste of crystallization wheel 1 resources, and further reducing the production cost of metal.

[0038] In this embodiment, the crystallization wheel 1 is placed on a rotating mechanism during the trimming process, and the rotating mechanism is used to drive the crystallization wheel 1 to rotate. Placing the crystallization wheel 1 on the rotating mechanism not only limits the placement state of the crystallization wheel 1 during trimming, but also allows the rotation angle of the crystallization wheel 1 to be adjusted through the rotating mechanism, making it more convenient for the staff to adjust the angle of the crystallization wheel 1 according to their own needs when trimming the crystallization wheel 1, making the trimming of the crystallization wheel 1 relatively simple and convenient. The rotating mechanism can be an industrial turntable, wherein the center of the crystallization wheel 1 mostly has a center hole. A positioning column corresponding to the size of the center hole is set at the center of the industrial turntable, and a gasket is wrapped around the periphery of the positioning column. The crystallization wheel 1 can then be sleeved on the periphery of the positioning column. The gasket can increase the friction between the positioning column and the crystallization wheel 1, ensuring that the crystallization wheel 1 is driven to rotate when the industrial turntable rotates.

[0039] Regarding the grinding of the opening width of the casting groove 11 in the crystallization wheel 1, the opening width and diameter of the casting groove 11 in the worn crystallization wheel 1 can be measured first. Based on the opening value of the casting groove 11 required for trimming, the staff can calculate the diameter reduction of the crystallization wheel 1 and record it as a1. Then, the crystallization wheel 1 is ground using a grinding device. Specifically, the opening value of the casting groove 11 required for trimming is 63mm. This can prevent the processing staff from over-grinding the outer peripheral surface of the crystallization wheel 1, and can further improve the dimensional accuracy of the trimmed crystallization wheel 1.

[0040] When grinding the outer circumference of the crystallization wheel 1, a grinding device can be placed on one side of the circumference of the crystallization wheel 1, and the cutter head in the grinding device can be aligned with the circumference of the crystallization wheel 1. The rotating mechanism drives the crystallization wheel 1 to rotate, and at this time, the cutter head is controlled to move a1 distance toward the center of the crystallization wheel 1. This allows the grinding of the outer circumference of the crystallization wheel 1 to be completed quickly. Specifically, the cutter head approaches the center of the crystallization wheel 1 twice. The first time, it approaches a1mm-0.02mm to perform rough machining on the circumference of the crystallization wheel 1. The cutter head is replaced with a fine machining cutter head, and the second time, it approaches a distance of 0.02 to perform fine machining on the circumference of the crystallization wheel 1. In this way, while improving the grinding efficiency of the outer circumference of the crystallization wheel 1, the roughness of the outer circumference of the crystallization wheel 1 can also be reduced, thereby improving the surface quality of the trimmed crystallization wheel 1.

[0041] Regarding the depth of the casting groove 11 of the crystallization wheel 1, after the outer peripheral surface of the crystallization wheel 1 is machined, the depth of the casting groove 11 of the crystallization wheel 1 is reduced, and the depth of the casting groove 11 needs to be machined. In this case, it is necessary to first measure the depth of the casting groove 11 of the crystallization wheel 1 after the outer peripheral surface is ground. Based on the standard depth of the casting groove 11, the depth value of the casting groove 11 that needs to be ground can be calculated. In this embodiment, it is recorded as a2. The direction of the grinding equipment head is adjusted so that the head is in contact with the bottom surface of the casting groove 11 of the crystallization wheel 1. The head is controlled to move a2 distance toward the center of the crystallization wheel 1. At this time, the depth of the casting groove 11 after grinding can reach the standard value, that is, the depth of the casting groove 11 of the crystallization wheel 1 after trimming is 44mm.

[0042] Specifically, the cutter head can approach the center of the crystallization wheel 1 twice. The first time, the cutter head approaches the center of the crystallization wheel 1 at a distance of 2mm-0.02mm to perform rough machining on the bottom surface of the casting groove 11 of the crystallization wheel 1. After the cutter head is replaced for fine machining, the cutter head approaches the center of the crystallization wheel 1 at a distance of 0.02mm to perform fine machining on the bottom surface of the casting groove 11 of the crystallization wheel 1. This not only improves the efficiency of the crystallization wheel 1 dressing process, but also reduces the roughness of the bottom surface of the casting groove 11 in the crystallization wheel 1 after dressing, thereby improving the quality of the trimmed crystallization wheel 1.

[0043] In this embodiment, the arc chamfer is formed by grinding with an arc chamfering machine. The arc chamfering machine is portable, and the processing personnel hold the arc chamfering machine close to the connection between the bottom surface of the casting tank 11 and the side wall of the casting tank 11 until the cutter head of the arc chamfering machine is in contact with the bottom surface of the casting tank 11 and the side wall of the casting tank 11. Then, the arc chamfering machine is started to form an arc chamfer at the connection between the bottom surface of the casting tank 11 and the side wall of the casting tank 11. Specifically, the radius of the arc chamfer is 10 mm, which can make the metal solution smoother during the filling process and improve the quality of the crystallization wheel 1 after the repair.

[0044] In this embodiment, after the arc chamfering is completed, a scanning device is used to perform a comprehensive scan on the trimmed crystal wheel 1 to determine whether there are cracks and damages on the trimmed crystal wheel 1, and to judge the quality of the trimmed crystal wheel 1. For the crystal wheel 1 that has been trimmed without any problems, it can be installed on the continuous rolling and continuous casting equipment and continue to be used. For the trimmed crystal wheel 1 that is scanned to have cracks and damages, a coaxial powder feeding device can be used to synchronously spray metal powder and laser beams to the cracked and damaged areas, and the cracked and damaged areas in the crystal wheel 1 can be reconstructed by melting and cladding layer by layer, so that the trimmed crystal wheel 1 meets the use requirements and can continue to be used in the continuous rolling and continuous casting equipment.

[0045] The worn crystallization wheel 1 is trimmed by the trimming method of the crystallization wheel 1 in this embodiment. According to practical tests, the trimmed crystallization wheel 1 can process another 5,000 tons of molten metal, thereby significantly extending the service life of a single crystallization wheel 1, reducing resource waste and lowering the production cost of metal.

[0046] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A method for dressing a crystallization wheel, for dressing a worn crystallization wheel (1), characterized in that: The crystallization wheel dressing method comprises: Grinding the outer peripheral surface of the crystallization wheel (1) until the opening width D1 of the casting groove (11) of the crystallization wheel (1) reaches 63 mm; Grinding the bottom surface of the casting trough (11) until the depth D2 of the casting trough (11) reaches 44 mm; Grinding the side wall of the casting trough (11) so that the angle between the side wall of the casting trough (11) and the bottom surface of the casting trough (11) is maintained at 102° until the width D3 of the bottom surface of the casting trough (11) reaches 44 mm; The connection between the bottom surface of the casting groove (11) and the side wall of the casting groove (11) is polished to form an arc chamfer.

2. The crystallization wheel dressing method according to claim 1, characterized in that: The crystallization wheel (1) is placed on a rotating mechanism, which is configured to drive the crystallization wheel (1) to rotate. When grinding the outer peripheral surface of the crystallization wheel (1), the opening width and diameter of the casting groove (11) in the crystallization wheel (1) are first measured. According to the required opening value of the casting groove (11), the diameter reduction value of the crystallization wheel (1) is calculated and recorded as a1. Subsequently, the crystallization wheel (1) is ground using a grinding device.

3. The crystallization wheel dressing method according to claim 2, characterized in that: A grinding device is placed on one side of the circumference of the crystallization wheel (1), and a cutter head is made to fit the circumference of the crystallization wheel (1). When a rotating mechanism drives the crystallization wheel (1) to rotate, the cutter head is controlled to move a distance a1 toward the center of the crystallization wheel (1).

4. The crystallization wheel dressing method according to claim 3, characterized in that: The cutter head approaches the center of the crystallization wheel (1) twice, the first time approaching the distance of 1mm-0.02mm to perform rough processing on the peripheral surface of the crystallization wheel (1), and the second time approaching the distance of 0.02mm to perform fine processing on the peripheral surface of the crystallization wheel (1).

5. The crystallization wheel dressing method according to claim 4, characterized in that: After the outer peripheral surface of the crystallization wheel (1) is processed, the depth of the casting groove (11) of the crystallization wheel (1) is measured. According to the standard depth of the casting groove (11), the depth value of the casting groove (11) of the crystallization wheel (1) that needs to be ground is calculated and recorded as a2. The direction of the tool head of the grinding equipment is adjusted so that the tool head fits with the bottom surface of the casting groove (11) of the crystallization wheel (1), and the tool head is controlled to move a2 distance toward the center of the crystallization wheel (1).

6. The crystallization wheel dressing method according to claim 5, characterized in that: The cutter head approaches the center of the crystallization wheel (1) twice, the first time approaching the distance of 2mm-0.02mm to rough-process the casting groove (11) of the crystallization wheel (1), and the second time approaching the distance of 0.02mm to fine-process the casting groove (11) of the crystallization wheel (1).

7. The crystallization wheel dressing method according to claim 1, characterized in that: The arc chamfer is formed by grinding with an arc chamfering machine.

8. The crystallization wheel dressing method according to claim 7, characterized in that: The radius of the circular chamfer is 10 mm.

9. The crystallization wheel dressing method according to claim 1, characterized in that: After the arc chamfering is completed, a scanning device is used to scan the crystallization wheel (1) to determine whether the crystallization wheel (1) has cracks and damage.

10. The crystallization wheel dressing method according to claim 9, characterized in that: Metal powder and laser beams are synchronously sprayed toward the areas with the cracks and the damage through a coaxial powder feeding device, and the areas with the cracks and the damage of the crystallization wheel (1) are reconstructed by cladding layer by layer.

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