A 6.5 gauge welding wire drawing device

Abstract

The utility model discloses a 6.5 specification welding wire drawing device, including 31 frame times roller ring pass and 32 frame times roller ring pass, 31 frame times roller ring pass includes first arc section and second arc section, and the both ends of first arc section are provided with second arc section respectively, and the radius of first arc section is 3.24 0.25mm, and the radius of second arc section is 3 3.24 0.25mm, and the hole width of 31 frame times roller ring pass is 7.75 0.25mm, and the hole depth is 2.61 0.25mm, 32 frame times roller ring pass includes third arc section and fourth arc section, and the both ends of third arc section are provided with fourth arc section respectively, and the radius of third arc section is 3.30 0.25mm, and the radius of fourth arc section is 2 3.30 0.25mm, and the hole width of 32 frame times roller ring pass is 6.63 0.25mm, and the hole depth is 2.80 0.25mm. The scheme reduces the 6.5 specification welding wire drawing broken wire rate, improves production efficiency and saves process cost simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of high-speed wire rod technology for steel rolling, and in particular to a 6.5 specification welding wire drawing device. Background Technology

[0002] The 6.5 specification welding wire is prone to high wire breakage rate during use. During customer production, the average number of wire breaks per shift reached more than 20 times, and the average production capacity per shift was only more than 40 tons. The following solutions are adopted in the existing technology to improve the situation: (1) Adjust the size control of the 6.5 specification finished product from 6.50±0.25mm to the lower tolerance control of 6.25-6.50mm; (2) Reduce the production speed from 105m / s to 102m / s. However, problems such as poor overall size control, slow production speed, large head and tail shearing amount, and high requirements for material size control have led to practical difficulties in the production process.

[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0004] In response to the problems pointed out in the background art, this utility model proposes a 6.5 specification welding wire drawing device, which can improve production efficiency and save process costs while reducing the wire breakage rate of 6.5 specification welding wire.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution: In some embodiments of this application, a 6.5 gauge welding wire drawing device is provided, comprising: The 31-pass roller ring die includes a first arc segment and a second arc segment. The second arc segment is provided at both ends of the first arc segment. The radius of the first arc segment is 3.24±0.25mm, and the radius of the second arc segment is 3×(3.24±0.25)mm. The width of the 31-pass roller ring die is 7.75±0.25mm, and the depth is 2.61±0.25mm. The 32-pass roller ring die includes a third arc segment and a fourth arc segment. The fourth arc segment is provided at both ends of the third arc segment. The radius of the third arc segment is 3.30±0.25mm, and the radius of the fourth arc segment is 2×(3.30±0.25)mm. The width of the 32-pass roller ring die is 6.63±0.25mm, and the depth is 2.80±0.25mm.

[0006] In some embodiments of this application, the aperture angle of the 31-pass roller ring is 80°.

[0007] In some embodiments of this application, the aperture angle of the 32-pass roller ring is 110°.

[0008] In some embodiments of this application, the chamfer radius of the opening edge of the 31st generation roller ring hole type is 1.0±0.25mm, and the chamfer radius of the opening edge of the 32nd generation roller ring hole type is 1.0±0.25mm.

[0009] In some embodiments of this application, the roller ring hole type with 29 passes is also included, with a hole width of 12.96±0.25mm, a hole depth of 1.9±0.25mm, a radius of 12.0±0.25mm, and a chamfer radius of 1.5±0.25mm at the edge of the hole.

[0010] In some embodiments of this application, a 30-pass roller ring perforation pattern is further included, comprising a fifth arc segment and a straight segment. The straight segment is respectively provided at both ends of the fifth arc segment. The radius of the fifth arc segment is 3.5±0.25mm. The hole width of the 30-pass roller ring perforation pattern is 7.14±0.25mm, the hole depth is 2.85±0.25mm, and the chamfer radius of the opening edge is 1.0±0.25mm.

[0011] In some embodiments of this application, the extension angle of the 30-pass roller ring perforation is 30°.

[0012] In some embodiments of this application, the temperature of the 6.5 specification welding wire drawing device entering the finishing mill is 935±15℃, the temperature of the sizing and reducing mill is 935±15℃, and the temperature of the wire exiting mill is 930±15℃.

[0013] In some embodiments of this application, only the insulation covers #1 and #2 of the 6.5 specification welding wire drawing device are opened.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are: The redesigned 29-32 stand roller ring die in this application reduces the difficulty of tolerance control while ensuring the finished product size. It also eliminates the special requirements for incoming materials from the previous pass, avoiding the ear problem that may be caused by small semi-finished product size control requirements. At the same time, the overall stability of the finished product size avoids the situation where the yield rate decreases due to increased head and tail shearing. After using the new die, the production speed was restored to 105m / s, which can ensure stable production while ensuring that the finished product size meets the requirements, thus improving production efficiency. Adjustments to process temperature and post-rolling temperature control facilitate the formation of coarse microstructures. Combined with smaller finished product dimensions, this reduces the wire breakage rate during drawing from over 50 times per shift to less than 5 times per shift, and increases single-shift capacity from over 40 tons to 58-62 tons.

[0015] Other features and advantages of this utility model will become clearer after reading the specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0016] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of a 29-pass roller ring bore according to some embodiments; Figure 2 This is a structural diagram of a 30-pass roller ring bore according to some embodiments; Figure 3 This is a structural diagram of a 31-pass roller ring bore according to some embodiments; Figure 4 This is a structural diagram of a 32-pass roller ring hole type according to some embodiments.

[0018] Figure label: 10. First arc segment; 20. Second arc segment; 30. Third arc segment; 40. Fourth arc segment; 50. Fifth arc segment; 60. Straight line segment. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0025] In some embodiments of this application, a 6.5 specification welding wire drawing device is provided, including 29-pass roller ring hole types, 30-pass roller ring hole types, 31-pass roller ring hole types, and 32-pass roller ring hole types. This application redesigns each hole type to ensure that the finished product size is controlled within 6.25-6.60mm, reducing the difficulty of size control and avoiding the semi-finished product ear problem that may occur when the tolerance control requirements of the previous pass are small under conventional 6.5 specification welding wire production (6.25-6.50mm). At the same time, the overall stability of the finished product size avoids the situation where increased head and tail shearing leads to a decrease in yield.

[0026] Specifically, refer to Figure 1 The width W of the roller ring die for 29 passes 29 The dimensions are 12.96±0.25mm, and the hole depth is D. 29 The dimensions are 1.9 ± 0.25 mm, and the radius is R. 29 The dimension is 0±0.25mm, and the chamfer radius R at the edge of the opening is... 29B The dimensions are 1.5±0.25mm. 29 passes use an elliptical bore pattern to reduce the cross-sectional area of ​​the welding wire, laying a foundation for subsequent rolling.

[0027] Reference Figure 2 The 30-pass roller ring profile includes a fifth arc-shaped section 50 and a straight section 60. Straight sections 60 are respectively provided at both ends of the fifth arc-shaped section 50. The radius R of the fifth arc-shaped section 50 is... 30 The dimension is 3.5±0.25mm. The bore width W of the 30-pass roller ring type. 30 The dimensions are 7.14±0.25mm, and the hole depth is D. 30 The dimensions are 2.85±0.25mm, and the chamfer radius R at the edge of the opening is... 30B The dimensions are 1.0 ± 0.25 mm. The extension angle α1 of the 30-pass roller ring perforation is 30°. Figure 2 The interior of the dashed frame is divided into 60 straight segments. The 30th sortie is a transitional circular hole type, which transforms the elliptical cross-section into a circle, in preparation for the precise shaping of the 31st sortie.

[0028] Reference Figure 3 The 31-pass roller ring profile includes a first arc-shaped section 10 and a second arc-shaped section 20, with the second arc-shaped section 20 located at both ends of the first arc-shaped section 10. The radius R of the first arc-shaped section 10 is... 311 The dimension is 3.24±0.25mm, and the radius R of the second arc segment 20 is... 312 The dimensions are 3 × (3.24 ± 0.25) mm. The bore width W of the 31-pass roller ring bore is... 31 The dimensions are 7.75±0.25mm, and the hole depth is D. 31 The dimensions are 2.61±0.25mm. Figure 3The interior of the dashed frame is divided into a second arc segment, 20. 31st batches are precision-formed holes, further reducing the diameter and preparing for arc extension.

[0029] Reference Figure 4 The 32-pass roller ring profile includes a third arc segment 30 and a fourth arc segment 40, with the fourth arc segment 40 located at both ends of the third arc segment 30. The radius R of the third arc segment 30 is... 321 The dimension is 3.30±0.25mm, and the radius R of the fourth arc segment 40 is... 322 The dimensions are 2 × (3.30 ± 0.25) mm. The width W of the perforation in the roller ring type is... 32 The dimensions are 6.63±0.25mm, and the hole depth is D. 32 The dimensions are 2.80±0.25mm. Figure 4 The section within the dashed box represents the fourth arc segment, 40. The 32nd batch was a precision-formed hole, with the final shape finalized and surface quality ensured through arc extension.

[0030] The 31st stand's roll ring profile uses a combination of the first arc segment 10 and the second arc segment 20; the 32nd stand uses a combination of the third arc segment 30 and the fourth arc segment 40; and the 30th stand features a fifth arc segment 50 combined with a straight segment 60. Compared to the traditional straight-line extension design of the roll ring, the arc structure makes the metal flow lines of the welding wire blank smoother and more uniform during rolling, effectively avoiding local stress concentration and solving the problem of semi-finished product ears caused by metal accumulation. Ears are one of the main causes of wire breakage during drawing. At the same time, the smooth transition of the arc segments reduces rolling defects on the surface of the welding wire, improves surface finish, and further reduces the risk of breakage during drawing. This application achieves precise matching of the hole size for each pass and controls the finished product size within a reasonable range of 6.25-6.60mm, resulting in smaller finished welding wire sizes with good consistency. This facilitates subsequent drawing to smaller specifications of welding wire products, expands the product's applicable scenarios, and avoids the problem of poor drawing adaptability caused by size fluctuations. For the 29th-32nd batch of roller ring die patterns, key dimensions (hole width, hole depth, radius of each arc segment, chamfer radius of the opening edge, etc.) are all subject to a tolerance range of ±0.25mm. This helps reduce the difficulty of dimensional control during production and decreases the scrap rate caused by dimensional deviations. Simultaneously, the finished product size range has been widened from the original 6.25-6.50mm to 6.25-6.60mm, avoiding a series of adaptation problems caused by excessively high dimensional requirements of incoming materials in previous batches under conventional tolerance control. After using the new die pattern, the production speed has recovered to 105m / s, enabling stable production while ensuring that the finished product dimensions meet requirements, thus improving production efficiency.

[0031] The roller ring hole type of the 29th and 30th batches only optimized the size while maintaining the original structural form. The 31st and 32nd batches innovatively adopted the arc segment combination structure, but the overall installation method is compatible with the existing equipment. There is no need to carry out large-scale modification of the main equipment of the production line, which reduces the technical transformation cost of enterprises and facilitates rapid promotion and application on the existing production line. In some embodiments of this application, the aperture angle α2 of the 31-pass roller ring die is 80°. The aperture angle α3 of the 32-pass roller ring die is 110°.

[0032] In actual rolling, the welding wire blank is rolled for 30 stands and then enters the 31st stand's rolling ring die at a speed of 105 m / s. After the blank from the 30th stand enters the 31st stand, the 80° die angle and the radius of curvature of the first arc segment 10 work together to gradually transition the contact area between the blank and the die from line contact to surface contact. This avoids the local accumulation of metal caused by the sudden increase in contact area in traditional small-angle die types, thus solving the problem of the semi-finished product's ear. After being rolled in 31 stands, the semi-finished billet enters the roll ring die in the 32nd stand. The 110° die angle creates a wide-opening shaping channel, allowing the semi-finished billet to be fully filled within the die, while also allowing the finished product size to fluctuate within the range of 6.25-6.60 mm. At a production speed of 105 m / s, the short residence time of the billet in the 32nd stand and the 110° die angle prevent dimensional deviations at the beginning and end due to untimely shaping. In some embodiments of this application, the chamfer radius R of the opening edge of the 31-frame roller ring die is... 31B The dimensions are 1.0±0.25mm, and the chamfer radius R of the edge of the roller ring hole type opening is 32 times. 32B The dimensions are 1.0 ± 0.25 mm.

[0033] In some embodiments of this application, the feed mill temperature of the 6.5 specification welding wire drawing device is 935±15℃, the feed sizing temperature is 935±15℃, and the wire exit temperature is 930±15℃. In the prior art, the feed mill temperature is 920±15℃, the feed sizing temperature is 920±15℃, and the wire exit temperature is 890±15℃.

[0034] Adjustments were made to the process temperature and post-rolling temperature control, which is more conducive to the formation of coarse structures. In addition, the finished product size is smaller, which reduces the wire breakage rate during drawing from more than 50 times per shift to less than 5 times per shift. The single-shift production capacity has increased from more than 40 tons to 58-62 tons.

[0035] In some embodiments of this application, only the insulation covers #1 and #2 of the 6.5 specification welding wire drawing device are opened. In the prior art, insulation covers #1, #2, #4, and #6 are opened.

[0036] Existing technologies enhance cooling by opening multiple shields, which can rapidly reduce the welding wire temperature, but this can easily lead to uncontrolled cooling rates. This application reduces the number of shields to be opened, shifting cooling control from rapid cooling to precise temperature control, thus adapting to the needs of welding wire microstructure regulation.

[0037] Specifically, in the actual production process, the welding wire blank undergoes 29-32 stands of rolling with a roll ring die and is then spun out by a wire spinneret before entering the cooling channel of the insulation hood. This application only activates insulation hoods #1 and #2, slowing down the overall cooling rate to reduce the difference between the surface and core cooling rates, thus improving the uniformity of the cross-sectional temperature field. At this point, the austenitic structure can simultaneously transform into fine-grained pearlite and a small amount of ferrite across the entire cross-section, completely avoiding the nucleation and growth of brittle phases such as martensite, and eliminating stress concentration sources for pull-out fracture at the microstructural level. In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0038] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A 6.5 specification welding wire drawing device, characterized in that, Including: The 31-pass roller ring die includes a first arc segment and a second arc segment. The second arc segment is provided at both ends of the first arc segment. The radius of the first arc segment is 3.24±0.25mm, and the radius of the second arc segment is 3×(3.24±0.25)mm. The width of the 31-pass roller ring die is 7.75±0.25mm, and the depth is 2.61±0.25mm. The 32-pass roller ring die includes a third arc segment and a fourth arc segment. The fourth arc segment is provided at both ends of the third arc segment. The radius of the third arc segment is 3.30±0.25mm, and the radius of the fourth arc segment is 2×(3.30±0.25)mm. The width of the 32-pass roller ring die is 6.63±0.25mm, and the depth is 2.80±0.25mm.

2. The 6.5 specification welding wire drawing device according to claim 1, characterized in that, The aperture angle of the 31-pass roller ring is 80°.

3. The 6.5 specification welding wire drawing device according to claim 1, characterized in that, The aperture angle of the 32-pass roller ring is 110°.

4. The 6.5 specification welding wire drawing device according to claim 1, characterized in that, The chamfer radius of the opening edge of the 31st generation roller ring hole type is 1.0±0.25mm, and the chamfer radius of the opening edge of the 32nd generation roller ring hole type is 1.0±0.25mm.

5. The 6.5 specification welding wire drawing device according to claim 1, characterized in that, It also includes 29 roller ring hole types, with a hole width of 12.96±0.25mm, a hole depth of 1.9±0.25mm, a radius of 12.0±0.25mm, and a chamfer radius of 1.5±0.25mm at the edge of the hole.

6. The 6.5 specification welding wire drawing device according to claim 1, characterized in that, It also includes a 30-pass roller ring perforation, comprising a fifth arc segment and a straight segment. The straight segment is provided at both ends of the fifth arc segment. The radius of the fifth arc segment is 3.5±0.25mm. The hole width of the 30-pass roller ring perforation is 7.14±0.25mm, the hole depth is 2.85±0.25mm, and the chamfer radius of the opening edge is 1.0±0.25mm.

7. The 6.5 specification welding wire drawing device according to claim 6, characterized in that, The extension angle of the 30-pass roller ring die is 30°.

8. The 6.5 specification welding wire drawing device according to any one of claims 1 to 7, characterized in that, The temperature of the 6.5 specification welding wire drawing device is 935±15℃ when it enters the finishing mill, 935±15℃ when it enters the sizing mill, and 930±15℃ when it exits the mill.

9. The 6.5 specification welding wire drawing device according to any one of claims 1 to 7, characterized in that, Only the insulation covers of the 6.5 specification welding wire drawing device are opened on the 1# and 2# covers.

Images