A wire rod mill for producing welding wire
By setting limit plates and limit blocks in the steel strip rolling mill for welding wire production, the problem of uneven stress on the U-shaped groove of the steel strip during cold rolling was solved, and stable forming and high-quality production of the steel strip were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-16
- Publication Date
- 2026-07-14
AI Technical Summary
In welding wire production, uneven stress can easily occur in the U-shaped groove of the steel strip during cold rolling, leading to twisting of the seam and affecting product quality.
A limiting plate and a limiting block are set between the U-shaped forming roll group and the seam forming roll group. The limiting plate and the limiting block are used to straighten the steel strip, prevent the U-shaped groove of the steel strip from twisting during cold rolling, and ensure that the steel strip is subjected to uniform force in subsequent processing.
This effectively avoids the twisting of the U-shaped groove in the steel strip during the cold rolling process, improving the forming quality and consistency of the product.
Smart Images
Figure CN224488054U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of welding wire production equipment, and in particular relates to a welding wire production steel strip rolling mill. Background Technology
[0002] In welding wire production, steel strips are passed sequentially through opposing rollers. First, the strip's cross-section is cold-rolled into a U-shape. Then, flux is filled into the grooves of the U-shape, followed by a second cold rolling process. This gradually closes the U-shape, forming an O-shape, before proceeding to the subsequent cold drawing and stretching process. However, in existing technology, uneven stress can easily occur on the groove walls on both sides of the U-shape during the cold rolling process after flux filling. This causes the seam at the closing point to twist. During the subsequent O-shape forming rolling process, the twisted seam can lead to uneven stress on the steel strip, resulting in cracking at the seam, flux leakage, and affecting product quality. Utility Model Content
[0003] In view of this, the present invention aims to propose a steel strip rolling mill for welding wire production, so as to straighten the steel strip, reduce the twisting of the steel strip seam, and improve product quality.
[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:
[0005] A steel strip rolling mill for producing welding wire includes a U-shaped forming roll group, a seam forming roll group, and an O-shaped forming roll group arranged sequentially along the direction of steel strip movement; the seam forming roll group is provided with a limiting plate on the side near the U-shaped forming roll group, and a space for steel strip to pass through is left between the two limiting plates, and the two sides of the steel strip can be tightly attached to the inner sidewalls of the two limiting plates respectively.
[0006] The O-forming roller group is provided with a limiting pressure block on the side near the seam forming roller group, and a V-shaped groove is opened on it, with the opening of the V-shaped groove facing the gap between the two forming rollers of the O-forming roller group.
[0007] Furthermore, a fixing plate is fixedly provided on the outer side of each of the two limiting plates, and a guide rod is provided between the two fixing plates. A guide sleeve corresponding to the guide rod is fixedly provided on each limiting plate.
[0008] Furthermore, bolts are screwed onto the fixing plate, and the ends of the bolts can abut tightly against the fixing plate.
[0009] Furthermore, each fixing plate has multiple bolts, and the bolts on each fixing plate are arranged along the length of the steel strip.
[0010] Furthermore, each of the limiting plates extends a guide surface outward from the end near the U-shaped forming roller group.
[0011] Furthermore, the limiting plate extends outward from one end near the seam forming roller assembly to form an auxiliary clamping part.
[0012] Furthermore, the forming roller assembly includes a gantry, an adjustment platform extending from the gantry toward the seam forming roller assembly, a limiting block positioned directly below the adjustment platform, and a screw extending vertically upward from the upper surface of the limiting block that can pass through the adjustment platform. Two adjusting nuts are screwed onto the screw, and the adjusting nuts can clamp the adjustment platform.
[0013] Furthermore, the adjustment platform has an elongated hole, through which the screw can pass. The length direction of the elongated hole is perpendicular to the movement direction of the steel strip.
[0014] Furthermore, guide plates are fixed on the wall of the V-shaped groove, and the two guide plates are close to the flared opening of one end of the V-shaped groove of the forming roller assembly.
[0015] Compared with existing technologies, the steel strip rolling mill for producing welding wire described in this utility model has the following advantages:
[0016] This utility model uses two limiting plates set upstream of the seam forming roller group to help clamp the U-shaped groove of the steel strip, thereby preventing the U-shaped groove of the steel strip from twisting when the seam forming roller group applies external force to the steel strip during operation, thus avoiding seam twisting that affects subsequent processing.
[0017] A limiting block with a V-groove is installed upstream of the O-forming roller group to limit the steel strip and prevent the steel strip after the seam is sewn from twisting after entering the O-forming roller group and being subjected to force, which would affect the product quality. Attached Figure Description
[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0019] Figure 1 This is a schematic diagram of the overall production line for welding wire steel strip pressing and rolling.
[0020] Figure 2 This is a schematic diagram of the overall structure of the powder scraping unit;
[0021] Figure 3 This is a schematic diagram illustrating the changes during the steel strip plastering and jointing process.
[0022] Figure 4 This is a schematic diagram of the mating parts of the limiting plate and the fixing plate;
[0023] Figure 5 A schematic diagram of the structure for setting up the limit block.
[0024] Explanation of reference numerals in the attached figures:
[0025] 1-U-forming roller assembly; 2-Seam forming roller assembly; 21-Fixed frame; 211-Gutter; 3-O-forming roller assembly; 31-Gantry; 41-Fixed plate; 42-Limiting plate; 421-Guide surface; 422-Auxiliary clamping part; 43-Bolt; 44-Guide rod; 51-Adjusting platform; 511-Oblong hole; 52-Limiting pressure block; 522-Guide plate; 523-Screw; 524-Adjusting nut; 6-Powder dropping unit; 61-Powder tank; 62-Gnawing cage; 63-Conveyor belt; 64-Guide plate; 7-Powder scraping unit; 71-Scraper; 711-Scraping part; 712-Scraping edge part; 73-Flexible pad; 74-Chuck; 741-Stud; 742-Flange; 743-Clamping nut; 75-Sleeve; 77-Top screw; 78-Connecting rod; 79-Fixed rod. Detailed Implementation
[0026] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0030] The steel strip rolling mill for producing welding wire according to this utility model includes at least one U-shaped forming roller group 1, a seam forming roller group 2, and an O-shaped forming roller group 3 arranged sequentially along the direction of steel strip movement. Between the U-shaped forming roller group 1 and the seam forming roller group 2, a powder-dropping unit 6 and a powder-scraping unit 7 are also provided. The U-shaped forming roller group 1 and the O-shaped forming roller group 3 each include two oppositely arranged rollers, and the circumferential surface of the rollers corresponds to the cross-section of the steel strip to be formed. The seam forming roller group 2 can be composed of two oppositely arranged rollers with a seam V-shaped groove corresponding to the U-shaped groove of the steel strip on the circumferential surface of one of the rollers, or it can be composed of three oppositely arranged rollers, with the circumferential surfaces of two rollers respectively placed on the inclined sides of the side wall of the U-shaped groove of the steel strip. This applies external force to the side walls of the U-shaped groove during operation, causing the side walls to come together to complete the seam. The two rollers can be mounted on a fixed frame 21, through which the fixed frame 21 applies a supporting force to the two rollers. Specifically, the fixing frame 21 is positioned above another roll and includes a slot 211 for mounting the roll shaft. The shafts of the two rolls that apply external force to the sidewalls of the U-shaped groove of the steel strip are placed inside the slot 211 and rotatably connected to the groove wall of the slot 211. Simultaneously, a slider is provided on each side of the fixing frame 21. The fixing frame 21 is slidably connected to the slide rails on both sides of a gantry 31 via the sliders, and the sliders are supported by screws 523 or nuts in the slide rails, thus fixing the fixing frame 21 in position. The two rolls on the fixing frame 21 can be driven by the friction of the moving steel strip or the friction of the lower roll, or a power source such as a motor can be fixed to the fixing frame 21 to make the two rolls rotate actively. The specific structure of each roll and how to drive or control the rotation of the rolls are existing technologies and will not be described in detail here.
[0031] In operation, the U-shaped forming roller group 1 presses the cross-section of the steel strip into a U-shape to form a U-shaped groove. Then, powder is filled into the U-shaped groove through the powder feeding unit 6. The steel strip then sequentially passes through the seam forming roller group 2 and the O-shaped forming roller group 3 to complete the initial production, awaiting the subsequent drawing process. In other embodiments, there can be multiple U-shaped forming roller groups 1, allowing the cross-section of the steel strip to be progressively pressed into a U-shape.
[0032] Specifically, in this embodiment, the powder feeding unit 6 includes a powder tank 61 and a conveyor belt 63 positioned below the discharge port of the powder tank 61. To control the feeding speed and ensure uniform feeding, a auger 62 is provided below the powder tank 61. The auger 62 transports the material in the powder tank 61 to the conveyor belt 63, and then the conveyor belt 63 transports the powder into the U-shaped groove of the steel belt. Those skilled in the art should know that how to transport materials via the auger 62 is common knowledge in the art, and the setting of the auger 62 will not be described in detail here. Specifically, the U-shaped groove of the steel belt is located below the end of the conveyor belt 63. The powder falling from the discharge port of the powder tank 61 can be transported by the conveyor belt 63 to the U-shaped groove of the steel belt to fill the steel belt with powder. In this embodiment, to make the steel belt feeding more accurate, a guide plate 64 is also provided below the steel belt. The guide plate 64 is inclined, with one end positioned directly below the end of the conveyor belt 63 and the other end positioned directly above the U-shaped groove of the steel belt. This ensures that the material first falls onto the guide plate 64 on the conveyor belt 63, and then slides off the guide plate 64 into the steel belt U-shaped groove, thus preventing some powder from falling into the steel belt U-shaped groove due to differences in the position of separation from the conveyor belt 63.
[0033] The powder scraping unit 7 is located on one side of the powder dropping unit 6 along the direction of the steel strip movement, i.e., downstream of the powder dropping unit 6. The powder scraping unit 7 includes a scraper 71, which includes a scraping part 711 that can extend into the U-shaped groove of the steel strip and scraping edge parts 712 that extend upward at an angle on both sides of the scraping part 711. The scraping edge parts can rest on the U-shaped groove of the steel strip, so that the upper surface of the powder pile in the steel strip forms a V-shape under the action of the scraper 71. When the steel strip moves to the seam forming roller group 2, the groove walls on both sides of the U-shaped groove of the steel strip contract inward. At this time, the powder also contracts towards the middle. Through the V-shaped powder pile design, the powder enters the space surrounded by the V-shape during the inward contraction process, thereby avoiding powder overflow and making the space enclosed by the steel strip as solid as possible, reducing the occurrence of cavities in the steel strip and affecting product quality.
[0034] In this embodiment, a flexible pad 73 is also fixed on the scraping part 712, and the flexible pad 73 is placed between the U-shaped groove of the steel strip and the hanging part. Thus, the flexible pad 73 contacts the two sides of the steel strip, avoiding direct contact between the scraper 71 and the edge of the steel strip, which would damage the edge of the steel strip and affect the sealing effect. Specifically, in this embodiment, each scraping part 712 is also fixed with multiple clamps 74. Each clamp 74 includes a stud 741 and a flange 742 extending outward from the end of the stud 741. A clamping nut 743 is screwed to the stud 741. The clamping stud 741 passes through the flexible pad 73 and the hanging part 712 through the through hole on the flexible pad 73 and the scraping part 712. Then, the flexible pad 73 and the scraping part 712 are fixed by tightening the clamping nut 743. At the same time, it is convenient to quickly replace the flexible pad 73, avoiding the flexible pad 73 from being in contact with the edge of the steel strip for a long time, which would cause scratching and damage to the flexible pad 73 and the scraper 71. Each of the scraping portions 712 is arc-shaped, and the edge of the U-shaped groove of the steel strip is placed within the arc-shaped opening, thereby making the contact between the edge of the scraper 71 and the edge of the steel strip more reliable. The arc-shaped design scrapes the upper surface of the edge of the U-shaped groove of the steel strip, preventing residual powder from affecting the joint. A fixing rod 79 is fixed above the U-shaped groove of the steel strip, and the fixing rod 79 is inserted into a sleeve 75. A connecting rod 78 extends from the middle of the powder scraping unit 7, and the connecting rod 78 is fixedly connected to the sleeve 75. A set screw 77 is screwed onto the sleeve 75, and the end of the set screw 77 can pass through the sleeve 75 and press tightly against the connecting rod 78. This fixes the angle and height of the scraper 71, and the fixing of the set screw 77 shares the weight of the scraper 71, reducing damage to the flexible pad 73 during the movement of the steel strip. Those skilled in the art should know that the fixed rod 79, fixed plate 41, powder tank 61, auger 62 and other components can be fixed by corresponding support frames, etc. The specific fixing structure and fixing method can be arranged according to the site conditions, and will not be described in detail here.
[0035] After the powder filling is completed by the U-shaped steel strip roller, the seam forming roller group 2 is provided with a limiting plate 42 on the side near the U-shaped forming roller group 1, and a space for the steel strip to pass through is left between the two limiting plates 42, and the two sides of the steel strip can be tightly attached to the inner sidewalls of the two limiting plates 42 respectively. Specifically, in this embodiment, a fixing plate 41 is fixedly provided on the outer side of each of the two limiting plates 42, and a guide rod 44 is provided between the two fixing plates 41. A guide sleeve corresponding to the guide rod 44 is fixedly provided on each limiting plate 42, so that the fixing plate 41 can move along the direction of the guide rod 44. Bolts 43 are screwed on the fixing plate 41, and the ends of the bolts 43 can be tightly abutted against the fixing plate 41. There are multiple bolts 43 on each fixing plate 41, and the bolts 43 on each fixing plate 41 are arranged along the length of the steel strip. Thus, in the initial production and installation process, by rotating the bolts 43, the limiting plate 42 can be tightly attached to both sides of the U-shaped groove of the steel strip. When the steel strip enters the seam forming roller group 2, the U-shaped groove of the steel strip is restricted by the limiting plate 42, which can resist the torsional force that may exist in the seam forming roller group 2, thereby allowing the steel strip to pass through the seam forming roller group 2 more stably and reducing the twisting of the steel strip during the seam forming process. In order to allow the U-shaped groove of the steel strip to enter the gap between the limiting plates 42 more smoothly, each of the limiting plates 42 extends outward from the end near the U-shaped forming roller group 1 with a guide surface 421, and the guide surface 421 is a funnel shape with the edge of the limiting plate 42 extending outward at an angle. The end of the limiting plate 42 near the seam forming roller group 2 extends outward to form an auxiliary clamping part 422, which can extend into and approach the contact point of the rolls of the seam forming roller group 2, thereby improving the steel strip's resistance to torsional force.
[0036] The O-forming roller assembly 3 includes a gantry 31. The fixing frame 21 extends an adjusting platform 51 towards the seam forming roller assembly 2. The O-forming roller assembly 3 has a limiting block 52 on the side near the seam forming roller assembly 2. The limiting block 52 is located directly below the adjusting platform 51. Specifically, a screw 523 extends vertically upward from the upper surface of the limiting block and can pass through the adjusting platform 51. Two adjusting nuts 524 are screwed onto the screw 523, and the adjusting nuts 524 can clamp the adjusting platform 51. The adjusting platform 51 has an elongated hole 511, through which the screw 523 can pass. The length direction of the elongated hole 511 is perpendicular to the movement direction of the steel strip. The height of the limiting block 52 is controlled by the two adjusting nuts 524, and the position of the limiting block 52 is controlled by the screw 523 and the elongated hole 511. The lower surface of the limiting pressure block 52 has a V-shaped groove, and the opening of the V-shaped groove faces the gap between the two forming rollers of the O-forming roller group 3. This allows the V-shaped groove of the limiting pressure block 52 to fit tightly against the upper side wall of the steel strip after the seam is closed, thereby providing anti-torsional force to the steel strip passing through the O-forming roller group 3 and preventing the steel strip from twisting due to uneven force during the extrusion of the roller group. Guide plates 522 are fixed on the groove wall of the V-shaped groove, and the two guide plates 522 are close to the flared opening of the groove at one end of the seam forming roller group 2.
[0037] A material distribution and collection tray (not shown in the figure) is provided directly below the powder dropping unit 6, the powder scraping unit 7 and the seam forming roller group 2 to receive any excess and scraped powder.
[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A steel strip rolling mill for producing welding wire, characterized in that: It includes a U-shaped forming roller group, a seam forming roller group and an O-shaped forming roller group arranged sequentially along the direction of steel strip movement; the seam forming roller group is provided with a limiting plate on the side near the U-shaped forming roller group, and a space is left between the two limiting plates for the steel strip to pass through, and the two sides of the steel strip can be tightly attached to the inner sidewalls of the two limiting plates respectively. The O-forming roller group is provided with a limiting pressure block on the side near the seam forming roller group, and a V-shaped groove is opened on it, with the opening of the V-shaped groove facing the gap between the two forming rollers of the O-forming roller group.
2. The steel strip rolling mill for producing welding wire according to claim 1, characterized in that: A fixing plate is fixedly provided on the outer side of each of the two limiting plates, and a guide rod is provided between the two fixing plates. A guide sleeve corresponding to the guide rod is fixedly provided on each limiting plate.
3. A steel strip rolling mill for producing welding wire according to claim 2, characterized in that: Bolts are screwed onto the fixing plate, and the ends of the bolts can press tightly against the fixing plate.
4. A steel strip rolling mill for producing welding wire according to claim 3, characterized in that: There are multiple bolts on each fixing plate, and the bolts on each fixing plate are arranged along the length of the steel strip.
5. A steel strip rolling mill for producing welding wire according to claim 1, characterized in that: Each of the limiting plates extends a guide surface outward from the end near the U-shaped forming roller group.
6. A steel strip rolling mill for producing welding wire according to claim 1, characterized in that: The limiting plate extends outward from one end near the seam forming roller assembly to form an auxiliary clamping part.
7. A steel strip rolling mill for producing welding wire according to claim 1, characterized in that: The forming roller assembly includes a fixed frame, an adjustment platform extending from the fixed frame toward the seam forming roller assembly, a limiting block positioned directly below the adjustment platform, and a screw extending vertically upward from the upper surface of the limiting block that can pass through the adjustment platform. Two adjusting nuts are screwed onto the screw, and the adjusting nuts can clamp the adjustment platform.
8. A steel strip rolling mill for producing welding wire according to claim 7, characterized in that: The adjustment platform has an elongated hole, through which the screw can pass. The length of the elongated hole is perpendicular to the direction of movement of the steel strip.
9. A steel strip rolling mill for producing welding wire according to claim 1, characterized in that: Guide plates are fixed on the wall of the V-shaped groove, and the two guide plates are close to the flared opening of the groove at one end of the seam forming roller group.