Reusable roller rings manufactured from scrapped roller rings and the manufacturing method thereof.

Abstract

This invention relates to the field of waste roller ring recycling technology, specifically to a reusable roller ring manufactured from waste roller rings and a method for manufacturing the reusable roller ring. The invention discloses a reusable roller ring manufactured from waste roller rings, comprising two semi-circular and symmetrically arranged roller rings. A tenon and mortise structure is provided between the two roller rings, which are combined through the tenon and mortise structure to form a perfectly circular structure with coincident centers. Clamping structures are provided on both axial sides of the roller rings to ensure the structural stability of the two roller rings during use. This invention modifies waste roller rings into smaller roller rings with lower performance requirements for transitional use, which has the advantage of reducing production costs.

Description

Technical Field

[0001] This invention relates to the field of waste roller ring recycling technology, specifically to a reusable roller ring manufactured from waste roller rings and a method for manufacturing the reusable roller ring. Background Technology

[0002] During the billet rolling process, after heating the billet with a square cross-section, it is usually rolled using cemented carbide rollers. After prolonged use, cemented carbide rollers may chip or develop spreading cracks.

[0003] If the carbide roller ring has small chips or small cracks, it can be repaired by grinding the outer circle directly. For example, the technical solution disclosed in Chinese Patent Application No. 201521079993.2 is a small roller ring made from a scrapped large-diameter roller ring. By grinding the outer edge of the scrapped large-diameter roller ring to the design requirement outer diameter of the roller ring, the service life is extended, thereby reducing the production cost.

[0004] However, the above solution cannot be used when there are large chips or cracks in the carbide roller ring. The chips fall from a side wall of the scrapped roller ring, and the cracks also spread radially from a certain point on the scrapped roller ring. Whether the chips are large or the cracks are deep, the usable radial dimension of the scrapped roller ring will be small, failing to meet the radial dimension design requirements. It may not even be usable as a small roller ring and can only be sold as scrap alloy. The recycling value of the scrap is far lower than the value of the carbide roller ring itself. Summary of the Invention

[0005] The purpose of this invention is to provide a reusable roller ring based on a scrapped roller ring that can be used as a transitional small roller ring with lower performance requirements.

[0006] To achieve the above objectives, this invention discloses a reusable roller ring manufactured from scrapped roller rings, comprising two semi-circular and symmetrically arranged roller rings, with a tenon and mortise structure between the two roller rings. The two roller rings are combined through the tenon and mortise structure to form a fully circular structure with the centers of the two rings coinciding. Clamping structures are provided on both axial sides of the roller rings to ensure the structural stability of the two roller rings during use.

[0007] The scrapped area on the scrapped roller ring is cut off to form a semi-circular roller ring. The two semi-circular roller rings are combined into a complete circular structure using a tenon and mortise structure. The complete circular structure is then fixed by clamping structures located on both sides of the axial direction of the complete circular structure, so that it can be used as a roller ring with lower performance as a transitional device.

[0008] Preferably, the tenon and mortise structure includes a connecting block located at one circumferential end of the roller ring, the connecting block having a dovetail-shaped structure, and a groove adapted to the connecting block at the other circumferential end of the roller ring.

[0009] By combining the two semi-circular roller rings into a complete circular structure using a dovetail-shaped structure and grooves, the stability of the two semi-circular roller rings during use can be guaranteed, preventing the two semi-circular roller rings from loosening after the clamping structure fails.

[0010] Preferably, the two ends of the connecting block have a rounded chamfered structure.

[0011] Compared to a design with triangular structures at both ends of the tail, this design avoids the stress on the triangular sections that could cause cracking during use (in a high-temperature and high-pressure environment) of a fully circular structure, thus reducing processing and usage stress.

[0012] Preferably, the clamping structure includes a sleeve and a nut. The sleeve is located in the inner hole of the circular structure. One axial end of the circular structure has a stepped surface. One end of the sleeve along the axial direction has a clamping plate that matches the stepped surface. The sleeve passes through the circular structure. The nut is threadedly connected to the outer circular surface of the other end of the sleeve along the axial direction. The nut has several countersunk threaded holes.

[0013] By using a sleeve and nut to apply force to both sides of the assembled roller ring, and by using screws in the countersunk threaded holes to hold one side of the two semi-circular roller rings in place, the preload between the sleeve and nut is increased, thereby reducing the probability of gaps appearing on both sides of the semi-circular roller rings.

[0014] Preferably, the thickness of the clamping plate is 0.3 mm less than the depth of the step surface, thereby preventing the sleeve from extending to the outside of the semi-circular roller ring after installation, which would cause slippage between the sleeve and the inner hole of the semi-circular roller ring.

[0015] This invention also discloses a method for manufacturing a reusable roller ring based on scrapped roller rings, comprising the following steps:

[0016] S1. Cut the scrapped area on the scrapped roller ring, leaving the usable area to form a semi-circular roller ring;

[0017] S2. Take the two semi-circular roller rings obtained in step S1, and process mortise and tenon structures at both ends of the two semi-circular roller rings in the circumferential direction, and process a stepped surface at one end of the two semi-circular roller rings in the axial direction.

[0018] S3. Assemble the two semi-circular roller rings using the tenon and mortise structure on the two semi-circular roller rings to form a complete circular structure;

[0019] S4. After passing the sleeve with the clamping plate through the center hole of the whole circular structure, it is threaded with the nut. The clamping plate of the sleeve abuts against the stepped surface at one end of the two semi-circular roller rings. The nut abuts against the end face of the whole circular structure relative to the stepped surface to realize the axial positioning of the two semi-circular rollers and complete the assembly.

[0020] S5. The outer diameter of the re-machined and reassembled circular structure;

[0021] S6. According to the design requirements, an annular groove is machined on the surface of the roller ring obtained in step S5.

[0022] When scrapped roller rings develop chips or cracks after use, the scrapped area on the roller ring is divided along a semi-circular volume. The ineffective part is cut off, and the usable part is retained. It is then processed into a semi-circular roller ring. The two semi-circular roller rings are then processed and assembled separately. A sleeve is then inserted from one axial side of the formed circular structure, so that it fits into the stepped surface of the circular structure. Finally, a nut is used to engage with the sleeve to define the circular structure formed by the assembly of the two semi-circular roller rings, thus obtaining a reusable roller ring.

[0023] The sleeve is used not only for clamping but also for reducing the inner diameter of the final formed reusable roll ring, thus enabling its use on rolling mills with smaller roll diameters. The present invention does not require extensive grinding and will not excessively reduce the overall wall thickness of the roll ring, thus ensuring the service life of the reusable roll ring.

[0024] This invention divides the scrapped area on the scrapped roller ring along a semi-circular volume, removing only the failed part and retaining the effective part to form a semi-circular roller ring. The two semi-circular roller rings are held together in a complete circular structure by sleeves and nuts, and can be used as a transitional roller ring with lower performance, thereby improving the utilization rate of materials, avoiding the disposal of the entire scrapped roller ring as waste, and effectively reducing the production cost of billet rolling.

[0025] Preferably, in step S2, one of the semicircular roller rings is wire-cut according to a positive tolerance, and the other semicircular roller ring is wire-cut according to a negative tolerance.

[0026] Because the metal wire used for cutting has a certain width during wire EDM, when designing the cutting size of one semicircular roller ring, a margin for the width of the metal wire needs to be left, while when designing the cutting size of the other semicircular roller ring, the width of the metal wire needs to be compensated to ensure that the two semicircular roller rings after assembly are a complete circular structure.

[0027] Preferably, in step S3, the semi-circular roller rings that have been machined with positive tolerances are cooled with liquid nitrogen, and then the two semi-circular roller rings are assembled using corresponding tenon and mortise structures.

[0028] Using liquid nitrogen to cool the semi-circular roller ring that has been machined with positive tolerances reduces the environmental impact compared to other methods that use liquid gas vaporization to absorb heat and achieve cooling and shrinkage. The semi-circular roller ring shrinks in size and then expands in size when it returns to room temperature, thus achieving an interference fit with the semi-circular roller ring that has been machined with negative tolerances, ensuring stability when the two semi-circular roller rings are connected or in operation.

[0029] Preferably, in step S3, the semi-circular roller ring that has undergone positive tolerance machining is cooled to a diameter reduction of 0.05 mm.

[0030] By limiting the specific dimensions, the two semi-circular roller rings can fit together when assembled, reducing the gap between the two semi-circular roller rings and thus ensuring the effectiveness of the interference fit after the two semi-circular roller rings are assembled together.

[0031] Preferably, in step S4, the sleeve is assembled onto one side of the two assembled semi-circular roller rings with a stepped surface.

[0032] Since the sleeve and nut are used together, the sleeve and nut are located at the two ends of the axial direction of the assembled circular structure. The pressure generated by the threaded engagement is used to fix the assembled circular structure. At the same time, since the sleeve fits into the stepped surface, it is ensured that the sleeve will not protrude from the circular structure after installation, thus completing the assembly.

[0033] This invention enables the conversion of scrapped roll rings into smaller roll rings with lower performance requirements for transitional use, and has the advantage of reducing the cost of roll ring components used in the billet rolling process. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of one structure of the present invention.

[0035] Figure 2 This is a schematic diagram of one of the explosion structures of the present invention.

[0036] Figure 3 This is a schematic diagram of the countersunk threaded hole at the nut of the present invention.

[0037] Figure 4 This is a schematic diagram of another exploded structure of the present invention.

[0038] Figure 5 This is a schematic diagram of the semi-circular roller ring of the present invention. Detailed Implementation

[0039] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0040] This embodiment discloses a reusable roller ring manufactured based on scrapped roller rings, which is made from... Figure 1 , Figure 4 As shown, it includes two semi-circular and symmetrically arranged roller rings 11, which are composed of... Figure 5 As shown, a tenon and mortise structure is provided between the two semicircular roller rings 11. The tenon and mortise structure includes a connecting block 22 located at one circumferential end of the semicircular roller ring 11. The connecting block 22 has a dovetail shape, and the width of the tail of the connecting block 22 is greater than 10 mm. The distance between the end face of the tail of the connecting block 22 and the connecting root is greater than 10 mm. The distance 'a' between the inner side of the connecting root of the connecting block 22 and the inner wall of the roller ring is greater than 15 mm. The angle between the inclined side of the connecting block 22 and the mating surface of the two semicircular roller rings 11 during assembly is greater than 50° and less than 60°, thereby ensuring the connection strength between the connecting block 22 and the semicircular roller ring 11 and preventing the connecting block 22 from breaking during use. The two ends of the tail of the connecting block 22 are rounded chamfered structures with a radius of 1.5 mm. The other circumferential end of the roller ring is provided with a groove 21 that matches the connecting block 22. The two roller rings cooperate with each other through the connecting block 22 and the groove 21, and then combine to form a complete circular structure 12 with the center of the circle overlapping. The circular structure 12 has a stepped surface 15 at its center, and clamping structures are provided on both sides of the roller ring along its axial direction. The clamping structures are used to ensure the structural stability of the two roller rings during use. The clamping structures include a sleeve 14 and a nut 13. The sleeve 14 is located in the inner hole of the circular structure 12.

[0041] Depend on Figure 2 As shown, the sleeve 14 is provided with a clamping section 141 that matches the stepped surface 15, a cylindrical section 142, and a threaded section 143 that mates with the nut 13 in sequence along the axial direction. The cylindrical section 142 penetrates the inner hole of the circular structure 12. The clamping section 141 is embedded in the stepped surface 15 at the center of the circular structure 12. The thickness of the clamping section 141 is 0.3 mm less than the depth of the stepped surface 15. The nut 13 is threadedly connected to the threaded section 143. The clamping section 141 and the nut 13 exert axial forces on both sides of the circular structure 12. Figure 3 As shown, the nut 13 is provided with several countersunk threaded holes 131, and screws 132 are provided in the countersunk threaded holes 131. The screws 132 in the countersunk threaded holes 131 press against one side of the two semicircular roller rings 11, thereby increasing the preload between the sleeve 14 and the nut 13 and reducing the probability of gaps appearing on both sides of the semicircular roller rings 11 in the axial direction.

[0042] This embodiment also discloses a method for manufacturing a reusable roller ring based on scrapped roller rings, including the following steps:

[0043] S1. Cut the scrapped area on the scrapped roller ring, leaving the usable area, to form a semi-circular roller ring 11;

[0044] S2. Take two semicircular roller rings 11, and perform line cutting on both ends of one semicircular roller ring 11 according to positive tolerance, and perform line cutting on both ends of the other semicircular roller ring 11 according to negative tolerance to process the mortise and tenon structure, and process a stepped surface 15 on one end of the two semicircular roller rings 11 along the axis.

[0045] S3. The semi-circular roller ring 11, which has been machined with positive tolerance, is cooled with liquid nitrogen until its diameter is reduced by 0.05 mm. Then, the two semi-circular roller rings 11 are assembled using corresponding tenon and mortise structures.

[0046] S4. The sleeve 14 with clamping section 141 is assembled onto one side of the two semi-circular roller rings 11 after assembly, which has a stepped surface 15. The clamping section 141 of the sleeve 14 abuts against the stepped surface 15 at one axial end of the two semi-circular roller rings 11. The cylindrical section 142 passes through the central hole of the circular structure 12 and is threadedly engaged with the nut 13 through the threaded section 143. The nut 13 abuts against the end face of the circular structure 12 relative to the stepped surface, thereby achieving axial positioning of the semi-circular roller rings 11 and completing the assembly.

[0047] S5. The outer circle dimensions of the re-machined and reassembled circular structure 12;

[0048] S6. According to the design requirements, an elliptical groove (not shown in the figure) with an axial cross section is cut on the outer circular surface of the circular structure 12 obtained in step S5, so as to roll the steel billet using the elliptical groove.

[0049] When the roller ring develops chips or cracks after use, the scrapped area on the roller ring is divided along a semi-circular volume, the failed part is cut off, and the effective part is left to form a semi-circular roller ring 11. Connecting blocks 22 and grooves 21 are machined on the two semi-circular roller rings 11 respectively. The connecting blocks 22 and grooves 21 are located at the two circumferential ends of the same semi-circular roller ring 11, thereby ensuring the dynamic balance of the two semi-circular roller rings 11 during rotation. During assembly, the semi-circular roller ring 11 and sleeve 14, machined with positive tolerances, are cooled with liquid nitrogen for 15 minutes. The cooled roller ring is then removed using a clamp. A copper rod is used to tap the connecting block 22 of the cooled roller ring into the groove 21 of the roller ring at room temperature. Simultaneously, the connecting block 22 of the roller ring at room temperature is tapped into the groove 21 of the cooled roller ring, allowing the two semi-circular roller rings 11 to fit together. A horizontal steel plate or cylinder is placed on top of the assembled circular structure 12, using the horizontal surface of the steel plate or cylinder to press the circular structure 12 firmly, preventing a difference in surface between the cooled roller ring and the roller ring at room temperature as the cooled roller ring gradually heats up and increases in size. After the circular structure 12 stabilizes, the sleeve 14 is removed using a clamp and positioned within the central hole of the circular structure 12. The clamping section 141 is embedded within the stepped surface 15 at the center of the circular structure 12, and the other end is tightened with a nut 13, thereby applying axial force to both sides of the circular structure 12. After the sleeve 14 returns to normal temperature, force is applied by the screw 132 of M12, so that it passes through the nut 13 and presses against the axial side of the two semi-circular roller rings 11, thereby increasing the preload between the sleeve 14 and the nut 13. The thread force is then used to correct the axial side of the two semi-circular roller rings 11 to fully fit with the clamping section 141 of the sleeve 14, thus completing the assembly.

[0050] The outer surface of the assembled circular structure 12 is re-machined to ensure it meets the drawing requirements. Finally, according to the steel mill's rolling requirements, elliptical grooves are cut on the outer surface of the two semi-circular roller rings 11 to ensure the groove runout dimensions.

[0051] This invention has the advantage of being able to modify scrapped roll rings to meet the standards for use again and for transitional use, thereby reducing the cost of roll ring components used in the billet rolling process.

Claims

1. A re-use roller ring manufactured based on a scrapped roller ring, characterized in that: The application relates to a roller ring assembly structure, which comprises two semicircular roller rings arranged symmetrically, a mortise-and-tenon structure arranged between the two roller rings, and a whole circular structure formed by the mortise-and-tenon structure, wherein axial two sides of the roller ring are provided with clamping structures for ensuring the structural stability of the two roller rings during use; the clamping structure comprises a sleeve and a nut, the sleeve is arranged at an inner hole of the whole circular structure, one end of the axial direction of the whole circular structure is provided with a stepped surface, one end of the axial direction of the sleeve is provided with a clamping plate matched with the stepped surface, the sleeve penetrates through the whole circular structure, and the nut is threadedly connected with the outer circular surface of the other end of the axial direction of the sleeve, and a plurality of countersunk threaded holes are arranged on the nut.

2. The multiplexed roller ring manufactured based on a scrapped roller ring according to claim 1, characterized in that: The mortise-and-tenon structure comprises a connecting block arranged at one end of the circumferential direction of the roller ring, the connecting block is in a dovetail structure, and the other end of the circumferential direction of the roller ring is provided with a groove matched with the connecting block.

3. The multiplexed roller ring manufactured based on a scrapped roller ring according to claim 2, characterized in that: The tail of the connecting block is provided with a chamfer structure in a circular arc shape.

4. The multiplexed roller ring manufactured based on a scrap roller ring according to claim 1, characterized in that: The thickness of the clamping plate is smaller than the depth of the stepped surface by 0.3 mm.

5. The method of claim 1-4, wherein The application further discloses a manufacturing method of the roller ring assembly structure. S1. cutting a scrap area on a scrap roller ring to leave a usable area, so as to form a semicircular roller ring; S2. taking two semicircular roller rings prepared in step S1, machining mortise-and-tenon structures at the circumferential two ends of the two semicircular roller rings respectively, and machining stepped surfaces at one end of the axial direction of the two semicircular roller rings; S3. assembling the two semicircular roller rings through the mortise-and-tenon structures on the two semicircular roller rings to form a whole circular structure; S4. threading a sleeve provided with a clamping plate through a center hole of the whole circular structure and threadedly matching with a nut, the clamping plate of the sleeve abuts against the stepped surface at one end of the axial direction of the two semicircular roller rings, and the nut abuts against the end surface of the whole circular structure relative to the stepped surface to realize axial limiting of the two semicircular rollers and complete assembly; S5. re-machining the outer circle size of the whole circular structure after assembly; S6. machining annular grooves on the surface of the roller ring obtained in step S5 according to design requirements.

6. The method of claim 5, wherein: In step S2, one of the semicircular roller rings is linearly cut according to a positive tolerance, and the other semicircular roller ring is linearly cut according to a negative tolerance.

7. The method of claim 6, wherein: In step S3, the semicircular roller ring machined according to the positive tolerance is cooled through liquid nitrogen, and then the two semicircular roller rings are assembled through the corresponding mortise-and-tenon structures.

8. The method of claim 7, wherein: In step S3, the semicircular roller ring machined according to the positive tolerance is cooled to a diameter of 0.05 mm.

9. The method of claim 5, wherein: In step S4, the sleeve is assembled to one side of the two semicircular roller rings after assembly and provided with the stepped surface.

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