Reused roll collar manufactured based on scrapped roll collar and manufacturing method of reused roll collar

Abstract

The invention relates to the technical field of recycling of scrapped roll collars, in particular to a reusable roll collar manufactured based on the scrapped roll collar and a manufacturing method of the reusable roll collar. The invention discloses a reusable roll collar manufactured based on scrapped roll collars, which comprises two semi-circular roll collars which are symmetrically arranged, a mortise and tenon joint structure is arranged between the two roll collars, the two roll collars are combined together through the mortise and tenon joint structure to form a full-circle structure with coincident circle centers, and clamping structures are arranged on the two axial sides of the roll collars. The clamping structure is used for guaranteeing the structural stability of the two roll rings in the using process. The scrapped roll collar is changed into the small roll collar with low use performance requirements for transition use, and the method has the advantage that the production cost can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of recycling scrapped roller rings, and in particular to a reused roller ring manufactured based on the scrapped roller ring and a manufacturing method of the reused roller ring. Background Art

[0002] In the process of rolling a steel billet, after heating the steel billet with a square cross section, a cemented carbide roller ring is usually used for rolling. After long-term use, the cemented carbide roller ring may fall off or develop spreading cracks.

[0003] If the carbide roller ring has small pieces or cracks, it can be repaired directly by grinding the outer circle; for example, the technical solution disclosed in Chinese patent application No. 201521079993.2 is a small roller ring made from a scrapped large roller ring. The outer edge of the scrapped large roller ring is ground to the outer diameter required by the design of the roller ring, thereby extending the service life and reducing production costs.

[0004] However, when large pieces or cracks appear on the cemented carbide roller ring, the above solution cannot be used; the pieces fall from the side wall of the scrapped roller ring, and the cracks also spread radially from a certain point on the scrapped roller ring. Whether it is a large piece or a deep crack, it will cause the available radial size of the scrapped roller ring to be smaller, failing to meet the radial size design requirements, and it cannot even be used as a small roller ring of small size. It can only be sold as scrap alloy, and the scrap recycling value is far lower than the value of the cemented carbide roller ring itself. Summary of the invention

[0005] The purpose of the present invention is to provide a reusable roller ring manufactured based on a scrap roller ring, which can be used as a small roller ring with lower performance requirements for transitional use.

[0006] To achieve the above-mentioned purpose, the present invention discloses a reused roller ring manufactured based on scrapped roller rings, including two semicircular roller rings that are symmetrically arranged, a mortise and tenon structure is provided between the two roller rings, and the two roller rings are combined together through the mortise and tenon structure to form a full circular structure with overlapping centers, and clamping structures are provided on both axial sides of the roller ring, and the clamping structures are used 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 semicircular roller ring, and the two semicircular roller rings are combined into a full circular structure by using the mortise and tenon structure. The full circular structure is then consolidated by clamping structures located on both sides of the axial direction of the full circular structure, so that it can be used as a transitional roller ring with lower performance.

[0008] Preferably, the mortise and tenon structure comprises a connecting block provided at one circumferential end of the roller ring, the connecting block is in a dovetail structure, and the other circumferential end of the roller ring is provided with a groove matched with the connecting block.

[0009] By combining the two semicircular roller rings into a full circular structure through a dovetail structure and a groove, the stability of the two semicircular roller rings during use can be ensured, and the two semicircular roller rings can be prevented from loosening after the clamping structure fails.

[0010] Preferably, both ends of the tail of the connection block are arc-shaped chamfered structures.

[0011] Compared with the triangular structure at both ends of the tail, it can avoid the stress of the triangular structure part causing the area to rupture during the use of the entire circular structure (in a high temperature and high pressure environment), thereby reducing processing stress and use stress.

[0012] Preferably, the clamping structure includes a sleeve and a nut, the sleeve is arranged at the inner hole of the full circular structure, one axial end of the full circular structure is provided with a step surface, one end of the sleeve along the axial direction is provided with a clamping plate matching the step surface, the sleeve passes through the full circular structure, the nut is threadedly connected to the outer cylindrical surface of the other end of the sleeve along the axial direction, and a plurality of countersunk threaded holes are provided on the nut.

[0013] By cooperating with the sleeve and the nut, the assembled roller ring is given axial force on both sides, and screws are set in the countersunk threaded holes to support the axial side of the two semicircular roller rings, thereby increasing the preload force between the sleeve and the nut and reducing the probability of gaps on both sides of the axial direction of the semicircular roller ring.

[0014] Preferably, the thickness of the clamping plate is 0.3 mm smaller than the depth of the step surface, thereby preventing the sleeve from extending to the outside of the semicircular roller ring after the sleeve is installed, causing slippage between the sleeve and the inner hole of the semicircular roller ring.

[0015] The present invention also discloses a method for manufacturing a reused roller ring based on a scrapped roller ring, comprising the following steps: S1. Cut the scrapped area on the scrapped roller ring and leave the usable area to form a semicircular roller ring; S2. Take the two semicircular roller rings obtained in step S1, and process the mortise and tenon structures at both ends of the two semicircular roller rings in the circumferential direction, and process the step surface at one end of the two semicircular roller rings in the axial direction; S3. The two semicircular roller rings are assembled through the mortise and tenon structure on the two semicircular roller rings to form a full circular structure; S4. The sleeve with the clamping plate is passed through the center hole of the full circular structure and matched with the nut thread. The clamping plate of the sleeve abuts against the step surface at one axial end of the two semicircular roller rings. The nut abuts against the end surface of the full circular structure relative to the step surface to achieve axial limit of the two semicircular rollers and complete the assembly. S5. The outer diameter of the circular structure after re-processing and assembly; S6. According to the design requirements, an annular groove is machined on the surface of the roller ring obtained in step S5.

[0016] When a scrapped roller ring has pieces falling off or cracks after use, the scrapped area on the scrapped roller ring is divided along a semicircular volume, the failed part is cut off, and the effective part is left, and then processed into a semicircular roller ring. The two semicircular roller rings are then processed and assembled separately, and the sleeve is extended from one axial side of the formed full circular structure to be embedded in the step surface of the full circular structure. Finally, the nut and the sleeve are matched to limit the full circular structure formed by assembling the two semicircular roller rings, so as to finally obtain a reused roller ring.

[0017] Among them, the sleeve is not only used for clamping, but also for reducing the inner diameter of the finally formed reused roller ring, so that it can be used on a rolling mill with a smaller roller diameter; the scheme of the present invention does not require large-scale grinding, will not excessively reduce the overall wall thickness of the roller ring, and can ensure the service life of the reused roller ring.

[0018] The present invention divides the scrap area on the scrap roller ring into semicircular volumes, only cuts off the invalid part and retains the effective part to form a semicircular roller ring, and maintains the two semicircular roller rings into a full circular structure through a sleeve and a nut, which are used as transitional roller rings with lower performance, thereby improving material utilization, avoiding the entire scrap roller ring from being treated as waste, and effectively reducing the production cost of billet rolling.

[0019] 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.

[0020] Because the metal wire used for cutting has a certain width during the wire cutting process, it is necessary to leave a margin for the metal wire width when designing the cutting size of one of the semicircular roller rings, and compensate for the metal wire width when designing the cutting size of the other semicircular roller ring to ensure that the two semicircular roller rings after assembly are a full circular structure.

[0021] Preferably, in step S3, the semicircular roller ring that has been processed with positive tolerance is cooled by liquid nitrogen, and then the two semicircular roller rings are assembled by corresponding mortise and tenon structures.

[0022] Using liquid nitrogen to cool the semicircular roller ring that has been processed with positive tolerance can reduce the impact on the environment compared to other methods in which liquid gas vaporizes and absorbs heat to achieve cooling and shrinking size. It can shrink the entire size of the semicircular roller ring. When it returns to normal temperature, the overall size becomes larger, thereby achieving an interference fit with the semicircular roller ring that has been processed with negative tolerance, ensuring the stability of the two semicircular roller rings when connected or working.

[0023] Preferably, in step S3, the semicircular roller ring that has undergone positive tolerance processing is cooled until its diameter is reduced by 0.05 mm.

[0024] By limiting the specific size, the two semicircular roller rings can fit together when assembled, reducing the gap between the two semicircular roller rings, thereby ensuring the effectiveness of the interference fit after the two semicircular roller rings are assembled.

[0025] Preferably, in step S4, the sleeve is assembled to the side having the step surface on the two assembled semicircular roller rings.

[0026] Since the sleeve and the nut are used in combination, the sleeve and the nut are respectively located at the axial ends of the full circular structure formed after assembly, and the full circular structure formed after assembly is fixed by the pressure generated by the threaded fit. At the same time, since the sleeve cooperates with the step surface, it is ensured that after the sleeve is installed, the sleeve will not protrude from the full circular structure, thereby completing the assembly.

[0027] The present invention can transform scrapped roller rings into small roller rings with lower performance requirements for transitional use, and has the advantage of being able to reduce the cost of roller ring workpieces used in the steel billet rolling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A structural schematic diagram of the present invention.

[0029] Figure 2 This is a schematic diagram of an explosion structure of the present invention.

[0030] Figure 3 It is a schematic structural diagram of the countersunk threaded hole at the nut of the present invention.

[0031] Figure 4 It is another schematic diagram of the explosion structure of the present invention.

[0032] Figure 5 It is a schematic structural diagram of the semicircular roller ring of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be further described below based on the accompanying drawings and specific embodiments.

[0034] This embodiment discloses a reused roller ring manufactured based on a scrapped roller ring. Figure 1, Figure 4 As shown, it includes two semicircular roller rings 11 that are symmetrically arranged. Figure 5 As shown, a mortise and tenon structure is provided between the two semicircular roller rings 11, and the mortise and tenon structure includes a connecting block 22 provided at one circumferential end of the semicircular roller ring 11, the connecting block 22 is a dovetail structure, the tail width of the connecting block 22 is greater than 10 mm, the distance between the tail end face of the connecting block 22 and the connecting root is greater than 10 mm, the spacing 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, and the angle between the hypotenuse of the connecting block 22 and the fitting surface of the two semicircular roller rings 11 during assembly is greater than 50° and less than 60°, thereby ensuring the connection strength of the connection 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 arc-shaped chamfered structures with a radius of 1.5 mm, and a groove 21 matched with the connecting block 22 is provided at the other circumferential end of the roller ring, and the two roller rings cooperate with each other through the connecting block 22 and the groove 21, and then are combined together to form a full circular structure 12 with overlapping centers. A step surface 15 is provided at the center of the full circular structure 12, and clamping structures are provided on both axial sides of the roller rings. The clamping structures are used to ensure the structural stability of the two roller rings during use. The clamping structure includes a sleeve 14 and a nut 13. The sleeve 14 is provided at the inner hole of the full circular structure 12.

[0035] Depend on Figure 2 As shown, the sleeve 14 is provided with a clamping section 141, a cylindrical section 142 and a threaded section 143 matching with the nut 13 in the axial direction, the cylindrical section 142 passes through the inner hole of the full circular structure 12, the clamping section 141 is embedded in the step surface 15 at the center of the full circular structure 12, the thickness of the clamping section 141 is less than the depth of the step surface 15 by 0.3mm, the nut 13 and the threaded section 143 are threadedly connected, and the clamping section 141 and the nut 13 exert forces on both sides of the axial direction of the full circular structure 12, Figure 3 As shown, a plurality of countersunk threaded holes 131 are provided on the nut 13, and screws 132 are provided in the plurality of countersunk threaded holes 131. The screws 132 are provided in the countersunk threaded holes 131 to support one axial side of the two semicircular roller rings 11, thereby increasing the preload force between the sleeve 14 and the nut 13 and reducing the probability of gaps on both axial sides of the semicircular roller rings 11.

[0036] This embodiment also discloses a method for manufacturing a reused roller ring based on a scrapped roller ring, comprising the following steps: S1. Cut the scrapped area on the scrapped roller ring, leaving the available area to form a semicircular roller ring 11; S2. Take two semicircular roller rings 11, and perform wire cutting at both ends of the circumference of one semicircular roller ring 11 according to the positive tolerance, and perform wire cutting at both ends of the circumference of the other semicircular roller ring 11 according to the negative tolerance, and process the mortise and tenon structure, and process the step surface 15 at one axial end of the two semicircular roller rings 11; S3. The semicircular roller ring 11 processed with positive tolerance is cooled by liquid nitrogen until the diameter is reduced by 0.05 mm, and then the two semicircular roller rings 11 are assembled by corresponding mortise and tenon structures; S4. Assemble the sleeve 14 with the clamping section 141 to the side with the step surface 15 on the two semicircular roller rings 11 after assembly, the clamping section 141 of the sleeve 14 abuts against the step surface 15 at one axial end of the two semicircular roller rings 11, the cylindrical section 142 passes through the center hole of the full circular structure 12 and then is threadedly matched with the nut 13 through the threaded section 143, the nut 13 abuts against the end surface of the full circular structure 12 relative to the step surface, and the axial limit of the semicircular roller ring 11 is achieved to complete the assembly; S5. The outer diameter of the entire circular structure 12 after reprocessing and assembly; S6. According to the design requirements, a groove (not shown in the figure) with an elliptical axial cross-section is opened on the outer circumferential surface of the full circular structure 12 obtained in step S5, so as to use the elliptical groove to roll the steel billet.

[0037] When the roller ring has pieces falling off or cracks after use, the scrapped area on the roller ring is divided along the semicircular volume, the failed part is cut off, and the effective part is left to form a semicircular roller ring 11. The two semicircular roller rings 11 are respectively processed to form connecting blocks 22 and grooves 21. The connecting blocks 22 and the grooves 21 are respectively located at the circumferential ends of the same semicircular roller ring 11, thereby ensuring the dynamic balance of the two semicircular roller rings 11 during rotation. During assembly, the semicircular roller ring 11 and sleeve 14 processed with positive tolerance are cooled by liquid nitrogen for 15 minutes, the cooled roller ring is taken out by a clamp, and the connection block 22 of the cooled roller ring is knocked into the groove 21 of the roller ring at room temperature by a copper rod. At the same time, the connection block 22 of the roller ring at room temperature is knocked into the groove 21 of the cooled roller ring, so that the two semicircular roller rings 11 are embedded, and a steel plate or cylinder with a horizontal surface is placed above the assembled full circular structure 12, and the full circular structure 12 is compacted by the horizontal surface of the steel plate or cylinder to prevent the roller ring from gradually heating up and increasing in size after cooling, and generating a difference surface with the roller ring at room temperature. After the full circular structure 12 is stable, the sleeve 14 is taken out by a clamp, so that it is located in the center hole of the full circular structure 12, and the clamping section 141 is embedded in the step surface 15 at the center of the full circular structure 12, and the other end is tightened by the nut 13, thereby applying force on both sides of the axial direction of the full circular structure 12. After the sleeve 14 returns to normal temperature, force is applied through the M12 screw 132 to penetrate the nut 13 and support the axial side of the two semicircular roller rings 11, thereby increasing the preload force between the sleeve 14 and the nut 13, and correcting the axial side of the two semicircular roller rings 11 to fully fit with the clamping section 141 of the sleeve 14 through the thread force, thereby completing the assembly.

[0038] The outer cylindrical surface of the assembled full circular structure 12 is reprocessed to ensure that it meets the requirements of the drawings. Finally, according to the rolling requirements of the steel plant, elliptical grooves are opened on the outer cylindrical surfaces of the two semicircular roller rings 11 to ensure the runout size of the groove.

[0039] The invention has the advantage of being able to remake the scrapped roller ring so that it can meet the use standard again and be used in transition, thereby reducing the cost of the roller ring workpiece used in the steel billet rolling process.

Claims

1. A reused roller ring manufactured based on a scrapped roller ring, characterized in that: It includes two semicircular and symmetrically arranged roller rings, a mortise and tenon structure is provided between the two roller rings, and the two roller rings are combined together through the mortise and tenon structure to form a full circular structure with overlapping centers, and clamping structures are provided on both axial sides of the roller rings, and the clamping structures are used to ensure the structural stability of the two roller rings during use.

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

3. The reused roller ring manufactured based on the scrapped roller ring according to claim 2 is characterized in that: Both ends of the tail of the connection block are arc-shaped chamfered structures.

4. The reused roller ring manufactured based on the scrapped roller ring according to claim 1, 2 or 3, characterized in that: The clamping structure includes a sleeve and a nut. The sleeve is arranged at the inner hole of the full circular structure. A step surface is provided at one axial end of the full circular structure. A clamping plate matching the step surface is provided at one end of the sleeve along the axial direction. The sleeve passes through the full circular structure. The nut is threadedly connected to the outer cylindrical surface of the other end of the sleeve along the axial direction. A plurality of countersunk threaded holes are provided on the nut.

5. The reused roller ring manufactured based on the scrapped roller ring according to claim 4 is characterized in that: The thickness of the clamping plate is 0.3 mm smaller than the depth of the step surface.

6. A method for manufacturing a reused roller ring based on scrapped roller rings according to any one of claims 1 to 5, characterized in that The steps include: S1. Cut the scrapped area on the scrapped roller ring and leave the usable area to form a semicircular roller ring; S2. Take the two semicircular roller rings obtained in step S1, and process the mortise and tenon structures at both ends of the two semicircular roller rings in the circumferential direction, and process the step surface at one end of the two semicircular roller rings in the axial direction; S3. The two semicircular roller rings are assembled through the mortise and tenon structure on the two semicircular roller rings to form a full circular structure; S4. The sleeve with the clamping plate in claim 3 is passed through the center hole of the full circular structure and then matched with the nut thread, the clamping plate of the sleeve abuts against the step surface at one axial end of the two semicircular roller rings, and the nut abuts against the end surface of the full circular structure relative to the step surface to achieve axial limiting of the two semicircular rollers and complete assembly; S5. The outer diameter of the circular structure after re-processing and assembly; S6. According to the design requirements, an annular groove is machined on the surface of the roller ring obtained in step S5.

7. The method for manufacturing a roller ring based on a scrap roller ring according to claim 6, characterized in that: In the step S2, one of the semicircular roller rings is subjected to wire cutting according to a positive tolerance, and the other semicircular roller ring is subjected to wire cutting according to a negative tolerance.

8. The method for manufacturing a roller ring based on a scrap roller ring according to claim 7, characterized in that: In the step S3, the semicircular roller ring that has been processed with positive tolerance is cooled by liquid nitrogen, and then the two semicircular roller rings are assembled by corresponding mortise and tenon structures.

9. The method for manufacturing a roller ring based on a scrap roller ring according to claim 8, characterized in that: In the step S3, the semicircular roller ring that has been processed with positive tolerance is cooled until its diameter is reduced by 0.05 mm.

10. The method for manufacturing a roller ring based on a scrapped roller ring according to any one of claim 6, characterized in that: In the step S4, the sleeve is assembled to the side with the step surface on the two assembled semicircular roller rings.

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