A cast iron straightening roll with a hardfacing groove

Abstract

The utility model relates to angle steel cast iron straightening roll technical field, concretely relates to a kind of angle steel cast iron straightening roll with surfacing groove, including middle shaft structure and the sleeve pipe structure of setting in the outside of middle shaft structure, middle shaft structure includes middle shaft and sleeve fixed in the outside of middle shaft, inner groove is set up on the lateral wall of sleeve, and it is set up in the lateral wall of sleeve with butt joint hole, sleeve pipe structure includes roll face, plug-in rod fixed in roll face and the connecting hole in the side of roll face, plug-in rod is inserted in inner groove, and roll face and sleeve are fixed in connecting hole and butt joint hole by locking bolt, realize connection, the inner groove of sleeve pipe structure in roll face is matched with the middle shaft structure sleeve, fixed in connecting hole and butt joint hole by locking bolt. When roll face appears abrasion or damage, it is not necessary to replace straightening roll as a whole, just need to disassemble locking bolt to replace roll face, not only reduce spare parts consumption cost, also greatly shorten equipment maintenance downtime, guarantee the continuous operation of production line.

Description

Technical Field

[0001] This utility model relates to the field of angle steel cast iron straightening rollers, specifically to an angle steel cast iron straightening roller with weld overlay holes. Background Technology

[0002] In the production and processing of angle steel, straightening is a crucial step to ensure the accuracy of the angle steel's shape and its performance. As the core component of the straightening equipment, the straightening roller's structural design and material properties directly determine the straightening efficiency and the quality of the angle steel product. Currently, most angle steel straightening rollers used in the industry adopt an integral structure, which mainly presents the following problems: ① Traditional straightening rollers are mostly cast or welded as a whole with the central shaft and roller surface. When the roller surface is worn or deformed, the entire straightening roller needs to be replaced. This not only leads to a significant increase in the cost of replacing spare parts, but also affects the continuous operation efficiency of the entire angle steel production line due to the long downtime for equipment maintenance. ②In the past, ductile iron straightening rollers were commonly used. However, cast iron straightening rollers have poor wear resistance, resulting in a small amount of steel passing through them. If a special welding technique is used, alloy components can be welded onto the cast iron material. Due to the shape of the hole and the stress, cracks or even breakage can easily occur on the welded surface, affecting the straightening effect. Utility Model Content

[0003] Technical problems to be solved In view of the above-mentioned shortcomings of the existing technology, the present invention provides an angle steel cast iron straightening roller with weld overlay hole type, which can effectively solve the problems in the existing technology.

[0004] Technical solution This utility model provides a cast iron angle steel straightening roller with weld overlay holes, including a central shaft structure and an outer sleeve structure sleeved on the outside of the central shaft structure. The central shaft structure includes a central shaft and a sleeve fixed on the outside of the central shaft. The sleeve has an inner groove on its side wall and a mating hole on its side wall. The outer sleeve structure includes a roller surface, an insert rod fixed in the roller surface, and a connecting hole on one side of the roller surface. The insert rod is inserted into the inner groove, and the roller surface and the sleeve are connected and fixed by locking bolts at the connecting hole and the mating hole. A groove is formed on the outer side of the middle part of the roller surface.

[0005] Furthermore, the center of the roller surface protrudes outward, and the corners of the groove are all rounded with R-angles.

[0006] Furthermore, the roller surface is a hollow cavity structure without a tail end, and the insert rods and inner grooves are equidistantly arrayed on the inner side of the roller surface and the outer side of the sleeve, respectively. Spacing grooves are formed between the insert rods, and the size of the inner groove is adapted to the size of the insert rods.

[0007] Furthermore, multiple sets of connecting holes are equidistantly arranged on the roller surface and docking holes are equidistantly arranged on the sleeve.

[0008] Furthermore, the roller surface is made of infinitely chilled ductile iron.

[0009] Beneficial effects This invention employs a separate design for the central shaft structure and the outer sleeve structure. The roller surface in the outer sleeve structure engages with the inner groove of the central shaft structure sleeve via an insert rod, and is fixed at the connecting hole and mating hole by locking bolts. When the roller surface becomes worn or damaged, there is no need to replace the entire straightening roller; only the locking bolts need to be removed to replace the roller surface. This not only reduces spare parts consumption costs but also significantly shortens equipment maintenance downtime, ensuring continuous operation of the production line.

[0010] In this device, the outward-protruding design of the roller surface in the middle better adapts to the "L"-shaped cross-section of the angle steel, improving the fit during the straightening process. Simultaneously, the rounded corners at the trough effectively prevent defects such as indentations and scratches caused by sharp edges on the angle steel surface, significantly improving the appearance quality and surface integrity of the angle steel products. Furthermore, the roller surface can be customized and replaced according to the straightening requirements of different angle steel specifications, greatly enhancing the equipment's adaptability to various production tasks. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is an exploded view of the structure of this utility model; Figure 4 This is a split cross-sectional view of the present invention.

[0013] The labels in the diagram represent: 1. Central shaft structure; 11. Central shaft; 12. Sleeve; 13. Inner groove; 14. Connecting hole; 2. Outer sleeve structure; 21. Roller surface; 22. Connecting hole; 23. Locking bolt; 24. Groove body; 25. Insert rod; 26. Spacer groove. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0015] The present invention will be further described below with reference to the embodiments.

[0016] Example: A cast iron angle steel straightening roller with weld overlay holes, see attached figure. Figure 1 - Appendix Figure 4 The device includes a central shaft structure 1 and an outer sleeve structure 2 sleeved on the outside of the central shaft structure 1. The central shaft structure 1 includes a central shaft 11 and a sleeve 12 fixed on the outside of the central shaft 11. An inner groove 13 is provided on the side wall of the sleeve 12, and a docking hole 14 is provided on the side wall of the sleeve 12. The outer sleeve structure 2 includes a roller surface 21, an insert rod 25 fixed in the roller surface 21, and a connecting hole 22 on one side of the roller surface 21. The insert rod 25 is inserted in the inner groove 13, and the roller surface 21 and the sleeve 12 are connected and fixed by locking bolts 23 at the connecting hole 22 and the docking hole 14. A groove 24 is provided on the outer side of the middle part of the roller surface 21. The design employs a separate structure 1 (central shaft 11) and outer sleeve structure 2. The roller surface 21 in the outer sleeve structure 2 engages with the inner groove 13 of the sleeve 12 of the central shaft 11 structure 1 via a rod 25, and is fixed at the connecting hole 22 and the mating hole 14 by locking bolts 23. When the roller surface 21 is worn or damaged, the entire straightening roller does not need to be replaced; only the locking bolts 23 need to be removed to replace the roller surface 21. This not only reduces spare parts consumption costs but also significantly shortens equipment maintenance downtime, ensuring continuous operation of the production line. The outward convex structure of the roller surface 21 better adapts to the "L"-shaped cross-section of the angle steel, improving the fit during the straightening process. At the same time, the corner of the groove 24 uses a rounded R-angle transition to reduce welding stress caused by sharp cold, which can lead to weld cracking. This effectively avoids defects such as indentations and scratches on the surface of the angle steel caused by sharp edges, significantly improving the appearance quality and surface integrity of the angle steel products. In addition, the roller surface 21 can be customized and replaced according to the straightening requirements of different specifications of angle steel, which greatly improves the adaptability of the equipment to different production tasks.

[0017] The roller surface 21 bulges outward from the middle, and the corners of the groove 24 are all rounded with R-angles. The roller surface 21 is a hollow cavity structure without a tail end, and the insert rods 25 and the inner grooves 13 are equidistantly arrayed on the inner side of the roller surface 21 and the outer side of the sleeve 12, respectively. Spacing grooves 26 are formed between the insert rods 25, and the size of the inner grooves 13 is adapted to the size of the insert rods 25. Multiple sets of connecting holes 22 are opened on the roller surface 21 and the mating holes 14 are equidistantly arrayed on the sleeve 12. The roller surface 21 is made of infinitely chilled ductile iron, which has excellent surface hardness and internal toughness. The high surface hardness can ensure that the roller surface 21 has good wear resistance during long-term straightening. This design extends the service life of the equipment. Its good internal toughness effectively resists the impact of alternating loads, preventing cracking and breakage of the roller surface 21. It achieves a perfect balance between wear resistance and structural strength, meeting the needs of large-scale, continuous angle steel straightening production and significantly reducing equipment replacement frequency and operating costs. The insert rod 25 and inner groove 13 are equidistantly arrayed on the inner side of the roller surface 21 and the outer side of the sleeve 12, with the inner groove 13 precisely matching the size of the insert rod 25. Combined with multiple sets of equidistantly arrayed connecting holes 22 and mating holes 14, precise positioning and secure connection between the roller surface 21 and the sleeve 12 can be achieved, effectively avoiding positioning deviations during assembly. This structural design significantly reduces the radial runout of the roller surface 21 during rotation, not only improving the straightening accuracy of the angle steel but also reducing wear on the roller surface 21 and bearings, extending the overall service life of the equipment, and reducing maintenance costs.

[0018] The roller surface 21 is made of infinite chilled ductile iron. The roller surface 21 adopts a hollow cavity structure with no face at the tail end. While ensuring that the structural strength of the roller surface 21 meets the straightening load requirements, it effectively reduces the overall weight of the straightening roller, reduces the power consumption of the drive equipment, and realizes the lightweight design of the equipment. At the same time, the hollow structure can also reduce the internal stress concentration of the roller surface 21 during the casting process, improve the overall mechanical properties of the roller surface 212, and further ensure the stability and safety of the straightening process.

[0019] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cast iron angle steel straightening roller with weld overlay holes, characterized in that, The device includes a central shaft structure (1) and an outer sleeve structure (2) sleeved on the outside of the central shaft structure (1). The central shaft structure (1) includes a central shaft (11) and a sleeve (12) fixed on the outside of the central shaft (11). The sleeve (12) has an inner groove (13) on its side wall and a docking hole (14) on its side wall. The outer sleeve structure (2) includes a roller surface (21), an insert rod (25) fixed in the roller surface (21), and a connecting hole (22) on one side of the roller surface (21). The insert rod (25) is inserted in the inner groove (13). The roller surface (21) and the sleeve (12) are connected and fixed by locking bolts (23) in the connecting hole (22) and the docking hole (14). A groove (24) is opened on the outer side of the middle part of the roller surface (21).

2. The angle steel cast iron straightening roller with weld overlay hole type according to claim 1, characterized in that, The middle part of the roller surface (21) protrudes outward, and the corners of the groove (24) are all rounded with R-angle.

3. The angle steel cast iron straightening roller with weld overlay hole type according to claim 1, characterized in that, The roller surface (21) is a hollow cavity structure without a tail end, and the insert rod (25) and the inner groove (13) are equidistantly distributed on the inner side of the roller surface (21) and the outer side of the sleeve (12), respectively. The insert rod (25) forms a spacer groove (26) between them, and the size of the inner groove (13) is adapted to the size of the insert rod (25).

4. The angle steel cast iron straightening roller with weld overlay hole type according to claim 1, characterized in that, The connecting holes (22) are arranged in multiple sets at equal intervals on the roller surface (21) and the docking holes (14) are arranged on the sleeve (12).

5. A cast iron angle steel straightening roller with weld overlay holes according to claim 4, characterized in that, The roller surface (21) is made of infinitely chilled ductile iron.

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