Stranded welding wire continuous rough drawing device and method

Abstract

The invention relates to the technical field of welding wire drawing forming, in particular to a stranded welding wire continuous rough drawing device and method.The stranded welding wire continuous rough drawing device comprises a drawing machine base, a drawing frame and drawing traction assemblies arranged at the two ends of the drawing frame, and hole drawing dies with the hole diameters decreasing step by step are sequentially arranged on the inner side of the drawing frame in the welding wire conveying direction. The drawing traction assembly drives the rotating component to operate synchronously under the action of the driving mechanism, so that the creeping cylinder generates eccentric swing and axial reciprocating motion in the rotating process, makes contact with the surface of the welding wire periodically and exerts intermittent traction effect on the welding wire, and therefore the welding wire is driven to be continuously conveyed and sequentially passes through the hole drawing dies to complete multi-stage drawing forming. The multiple drawing machine bases can be arranged in a combined mode in the axial direction, and all the traction units keep running at the constant speed, so that speed difference and tension superposition of welding wires between different drawing stations are avoided. According to the invention, the problem that the wire is easy to break due to stress concentration in the traditional roller clamping type drawing process is solved, and the device is suitable for continuous rough drawing processing of the stranded welding wire.

Description

Technical Field

[0001] This invention relates to the field of welding wire drawing and forming technology, specifically to a continuous rough drawing device and method for stranded welding wire. Background Technology

[0002] The production of stranded welding wire typically involves multiple drawing processes to achieve a gradual reduction in wire diameter and stable control of surface quality. Especially in the rough drawing stage, the initial diameter of the welding wire is large, the material rigidity is high, and the surface condition is unstable, which places high demands on the uniformity of stress, the traction method, and the continuity of forming during the drawing process.

[0003] In existing technologies, continuous drawing devices for stranded welding wire mostly employ a roller clamping and traction method. This involves continuously clamping the welding wire using pairs of drive rollers arranged vertically or horizontally, and relying on the synchronous rotation of the rollers to traction and transport the wire. Simultaneously, several drawing dies are set along the traction path, allowing the welding wire to pass through the drawing dies sequentially while being clamped and tractiond, thus completing the drawing process. This type of structure is simple, and the driving method is intuitive, making it somewhat applicable in fine drawing or single-pass drawing processes.

[0004] However, under continuous rough drawing conditions for stranded welding wire, the aforementioned roller clamping drawing method still has significant technical shortcomings. On the one hand, the rollers apply a continuous clamping traction force to the welding wire. As the welding wire passes through the drawing die, it simultaneously bears the combined effects of drawing resistance and clamping traction force, which easily leads to localized stress concentration. Especially when there are micro-defects or cross-sectional changes on the welding wire surface, tensile fracture is highly likely to occur, affecting the stability of continuous production. On the other hand, to ensure traction force, the rollers usually require a large clamping pressure, which not only exacerbates wear on the welding wire surface but also limits its adaptability to changes in welding wire specifications.

[0005] In addition, existing continuous drawing devices mostly use a single traction drive unit to uniformly pull multiple drawing dies. The welding wire relies on the same traction source to complete the conveying in a long drawing path. As the number of drawing stages increases, the axial tension of the welding wire continues to accumulate, making it difficult to achieve force distribution and dynamic adjustment between each drawing station. This further increases the risk of wire breakage and is not conducive to long-term continuous operation.

[0006] In summary, the existing continuous rough drawing technology for stranded welding wire still has shortcomings in terms of the rationality of the force distribution in the traction method, the stable coordination of the drawing and conveying process, the tension control of the multi-stage drawing station, and the flexible adaptability of the drawing die structure. There is an urgent need for a new structural form and working method to improve the stress state of the welding wire in the continuous rough drawing process, and to improve the drawing stability and production adaptability. Summary of the Invention

[0007] This invention aims to solve the technical problems commonly found in the continuous rough drawing process of stranded welding wire, such as concentrated traction force, high risk of wire breakage, difficulty in coordinating multi-stage drawing tension, and inconvenience in changing drawing dies. This invention proposes a continuous rough drawing device and method for stranded welding wire. By reconstructing the drawing structure and traction drive mode as a whole, the welding wire can achieve force dispersion, continuous conveying, and stable forming in the multi-stage drawing process, thereby improving the reliability and process adaptability of continuous rough drawing operations.

[0008] To achieve the above objectives, the technical solution provided by the present invention is as follows: a continuous coarse drawing device and method for stranded welding wire, comprising a drawing machine base, a drawing frame, and drawing traction components disposed at both ends of the drawing frame. A plurality of drawing dies are sequentially arranged on the inner side of the drawing frame along the wire conveying direction. Under the action of the driving mechanism, the drawing traction components apply a periodic traction action to the welding wire, so that the welding wire passes through each drawing die sequentially during continuous conveying to complete multi-stage drawing and forming.

[0009] In a preferred embodiment, the drawing machine base is further configured such that: a bearing bracket is provided on the drawing machine base for supporting and positioning the rotating parts in the drawing traction assembly; a drive motor is provided inside the drawing machine base; and the drive motor provides rotational driving force to the drawing traction assembly through a transmission structure, thereby ensuring the stability of the traction mechanism operation.

[0010] Specifically, by modularizing the traction drive structure and the load-bearing structure, the whole machine runs smoothly and is easy to use in combination with multiple bases.

[0011] In a preferred embodiment, the drawing frame is further configured such that: a number of drawing dies are sequentially installed on the inner side of the drawing frame along the axial direction via a fixed seat, and the diameter of the hole of each drawing die gradually decreases along the wire feeding direction, so that the wire is drawn and deformed step by step when passing through different drawing dies.

[0012] Specifically, the welding wire is drawn in stages by gradually changing the aperture, which reduces the amount of deformation in a single drawing and improves the stability of the forming process.

[0013] In a preferred embodiment, the pull-out traction assembly is further configured as follows: the pull-out traction assembly includes a rotating sleeve, a shaft pin, and several worm cylinders. The rotating sleeve rotates under the action of the drive mechanism, and the shaft pin rotates synchronously with the rotating sleeve through a meshing structure. Each worm cylinder is sleeved on the outside of the shaft pin and can generate eccentric oscillation during the rotation of the shaft pin.

[0014] Specifically, by combining rotation drive with eccentric structure, the traction action is changed from continuous clamping to periodic traction, thereby improving the stress state of the welding wire.

[0015] In a preferred embodiment, the worm cylinder is further configured such that it generates axial reciprocating motion during rotation through a beveled mating structure, and periodically contacts the surface of the welding wire during the reciprocating motion. During the contact phase, it applies traction or pushing action to the welding wire, and completes the return motion during the disengagement phase.

[0016] Specifically, by using intermittent contact traction, the welding wire is prevented from being subjected to concentrated tension for a long time, effectively reducing the risk of wire breakage.

[0017] In a preferred example, the configuration is further as follows: several drawing traction components are arranged sequentially along the wire feeding direction, and the rotating sleeves in each drawing traction component are adjusted at the same speed to ensure that each traction station maintains a consistent traction speed.

[0018] Specifically, by controlling multiple traction units at the same speed and simultaneously, speed differences and tension superposition between different drawing stations of the welding wire are avoided.

[0019] In a preferred embodiment, the drawing die is further configured such that it is a replaceable structure, and when the welding wire specifications or process parameters change, the drawing die can be replaced or adjusted along the axial direction to match different rough drawing process requirements.

[0020] Specifically, the replaceable design of the drawing die improves the device's adaptability to different welding wire specifications and enhances its ease of maintenance.

[0021] In a preferred example, the configuration is further configured such that by arranging multiple drawing frames together along the axial direction, the welding wire is continuously conveyed and drawn under the synergistic action of multiple sets of drawing frames and drawing traction components.

[0022] Specifically, it achieves continuous rough drawing production through modular combination, and is suitable for long-line, multi-stage drawing operation scenarios.

[0023] The beneficial effects achieved by this invention are as follows:

[0024] 1. In this invention, by alternating the multi-stage drawing structure and the conveying drive structure, the welding wire is plastically deformed step by step through the forming hole during the continuous drawing process by intermittent traction. This avoids the problem of tensile fracture of the welding wire caused by continuous clamping and concentrated force in traditional roller clamping drawing, effectively reducing the risk of wire breakage in the rough drawing stage and improving the stability of the drawing process and the consistency of the finished product.

[0025] 2. By forming an alternating configuration between the drawing frame and the drawing traction assembly, the present invention enables the welding wire to obtain continuous and controllable conveying power between each drawing station. This ensures continuous axial feeding of the welding wire during the drawing process and avoids tension accumulation caused by long-distance traction of a single drive structure, thereby improving the reliability and adaptability of continuous rough drawing operations as a whole.

[0026] 3. This invention arranges drawing dies with progressively smaller apertures in multiple drawing frames and makes the drawing dies replaceable, enabling rapid switching of the rough drawing process for different specifications of welding wire by changing the drawing dies. This significantly improves the versatility, ease of maintenance, and flexibility of process adjustment of the device, making it suitable for continuous, multi-specification stranded welding wire production applications. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the surface and internal structure of a drawing machine base according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of a pull-out frame and its two-end pull-out traction components according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the pull-out frame and the pull-out traction assembly according to an embodiment of the present invention;

[0031] Figure 5 This is an exploded structural diagram of the drawing frame and drawing die according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of a hole-drawing die structure according to an embodiment of the present invention;

[0033] Figure 7 This is an exploded view of the pull-out traction assembly according to an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the worm gear cylinder and shaft pin assembly structure according to an embodiment of the present invention;

[0035] Figure 9 This is an exploded structural diagram of the worm gear cylinder and shaft pin according to an embodiment of the present invention;

[0036] Figure 10 This is a schematic diagram of the continuous combination state of multiple drawing machine bases according to an embodiment of the present invention.

[0037] Figure label:

[0038] 100. Drawing machine base; 110. Bearing bracket; 120. Drive motor;

[0039] 200. Pulling bracket; 210. Fixing base; 220. Pulling die; 221. Hole;

[0040] 300. Pull-out traction assembly; 310. Fixed sleeve; 320. Rotating sleeve; 330. Creeping cylinder; 340. Shaft pin; 311. Inclined ring washer; 321. Synchronous gear ring; 331. Abutment block; 332. Inclined guide surface; 341. Transmission gear; 342. Eccentric part. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0042] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0043] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, a continuous rough drawing apparatus and method for stranded welding wire.

[0044] Combination Figures 1 to 9 As shown, the continuous coarse drawing device for stranded welding wire provided by the present invention includes a drawing machine base 100, a drawing frame 200 disposed on the drawing machine base 100, and a drawing traction assembly 300 fixedly disposed at both ends of the drawing frame 200.

[0045] In this embodiment, the drawing machine base 100 serves as the foundation for the entire machine, and a bearing bracket 110 is provided on its upper surface. The bearing bracket 110 provides stable support for the rotating components in the drawing traction assembly 300. A drive motor 120 is fixedly installed inside the drawing machine base 100. The output end of the drive motor 120 is connected to the rotating sleeve 320 and the synchronous gear ring 321 in the drawing traction assembly 300 through a belt drive component, providing continuous rotational driving force for the drawing traction assembly 300.

[0046] according to Figures 2 to 6 As shown, the drawing frame 200 is positioned above the drawing machine base 100 and arranged along the wire feeding direction. Several drawing dies 220 are detachably mounted on the inner side of the drawing frame 200. The drawing dies 220 are arranged sequentially along the axial direction of the drawing frame 200 via fixed bases 210. The diameter of the bore 221 in each drawing die 220 gradually decreases along the wire feeding direction, allowing the wire to undergo multi-stage drawing and forming sequentially as it passes through different drawing dies 220.

[0047] according to Figure 7 and Figure 8As shown, the pulling traction assembly 300 is disposed at both ends of the pulling frame 200, and includes a fixed sleeve 310, a rotating sleeve 320, several worm gears 330, and a shaft pin 340. The rotating sleeve 320 is rotatably sleeved on the inner side of the bearing bracket 110, and a synchronous gear ring 321 is provided at one end. A transmission gear 341 is fixedly sleeved on one end of the shaft pin 340, and the transmission gear 341 meshes with the inner side of the synchronous gear ring 321, so that the shaft pin 340 rotates synchronously when the synchronous gear ring 321 rotates. Both the rotating sleeve 320 and the synchronous gear ring 321 have through holes at their axial centers for the welding wire to pass through, thereby ensuring that the welding wire can continuously pass through along the axial direction of the device.

[0048] In this embodiment, a plurality of pins 340 are evenly arranged in a circumferential direction, and a worm cylinder 330 is rotatably sleeved on the outer side of each pin 340. An eccentric portion 342 is provided on the surface of the pin 340, and the outer circumference of the eccentric portion 342 is offset relative to the axis of the pin 340, causing the worm cylinder 330 to oscillate eccentrically during the rotation of the pin 340. A stop block 331 is provided on one side of the worm cylinder 330. The eccentricity of the pin 340 causes the stop block 331 to radially face the welding wire surface. Adjacent stop blocks 331 slide against each other to limit the movement and prevent the worm cylinder 330 from deflecting. The surface of the stop block 331 is provided with an anti-slip toothed structure, and adjacent stop blocks 331 abut against each other and can slide together.

[0049] according to Figure 9 As shown, a slanted ring pad 311 is slidably mounted on the inner side of the fixed sleeve 310. The slanted ring pad 311 is fixedly sleeved on the outer side of the shaft pin 340 and rotates synchronously with the shaft pin 340. The worm cylinder 330 has slanted guide surfaces 332 on both sides that slide against the surface of the slanted ring pad 311. During the rotation of the shaft pin 340, the slanted ring pad 311, through its engagement with the slanted surfaces of the guide surfaces 332, causes the worm cylinder 330 to reciprocate axially while eccentrically oscillating.

[0050] In this embodiment, when the worm cylinder 330 rotates with the shaft pin 340 to the position where the abutment block 331 disengages from the surface of the welding wire, the worm cylinder 330 completes its return motion; when the worm cylinder 330 continues to rotate with the shaft pin 340 to the position where the abutment block 331 contacts the surface of the welding wire, the worm cylinder 330 applies a traction or pushing force to the welding wire under the combined action of eccentric oscillation and axial displacement, thereby driving the welding wire to be continuously conveyed along the drawing direction.

[0051] A method for continuous rough drawing of stranded welding wire includes the following steps:

[0052] S1. Multiple drawing machine bases 100 are arranged axially along the wire feeding direction to form a continuous arrangement of adjacent drawing frames 200. Drawing dies 220 with progressively smaller hole diameters are installed on the inner side of each drawing frame 200 to construct a continuous and progressive wire drawing channel.

[0053] S2. By synchronously driving and controlling several rotating sleeves 320 through the drive motor 120, each rotating sleeve 320 is kept rotating at the same speed, thereby ensuring that the shaft pins 340 in each drawing traction assembly 300 run at the same speed and avoiding speed difference between different drawing stations of the welding wire.

[0054] S3. During the operation of the traction assembly 300, the welding wire is continuously conveyed. Under the periodic traction action of the worm cylinder 330, the welding wire passes through the holes 221 of the drawing die 220 arranged along the axial direction and with the hole diameter decreasing step by step. The wire is gradually drawn and deformed during the process of passing through each hole 221, so as to realize the continuous rough drawing and forming of the welding wire.

[0055] S4. Based on the specifications of the welding wire or the process requirements, the axial replacement or adjustment of the drawing die 220 in different drawing frames 200 is carried out so that the hole diameter configuration of the drawing die 220 matches the requirements of the rough drawing process of the welding wire.

[0056] Working principle and usage process of this invention:

[0057] like Figure 10 As shown, in use, the present invention arranges multiple drawing machine bases 100 sequentially along the axial direction to form a continuous arrangement of multiple drawing frames 200, and sequentially fixes drawing dies 220 with progressively smaller hole diameters inside each drawing frame 200, thereby constructing a continuous and progressive wire drawing channel and realizing continuous rough drawing of the welding wire.

[0058] During the wire drawing process, as the shaft pin 340 rotates continuously, the worm gear 330, sleeved on the outside of the shaft pin 340, reciprocates under the action of the inclined ring pad and the inclined guide surface, and periodically forms a gap contact with the surface of the welding wire during the movement. Specifically, when the worm gear 330 leaves the surface of the welding wire, it completes its return motion; when the worm gear 330 is in contact with the surface of the welding wire, it exerts a traction or pushing force on the welding wire through the abutment structure, thereby driving the welding wire to be continuously conveyed along the drawing direction.

[0059] Under the periodic traction of the worm gear 330, the welding wire passes through the holes 221 of each drawing die 220 in sequence, and completes the drawing deformation and dimensional shaping during the process of passing through the holes 221, thus realizing the continuous rough drawing process of the welding wire.

[0060] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A continuous rough drawing device for stranded welding wire, characterized in that, include: A drawing machine base (100) has a bearing bracket (110) on its surface; A puller (200) has several pull-hole molds (220) detachably installed on its inner side. The pulling traction assembly (300) is fixed at both ends of the pulling frame (200) and includes a fixed sleeve (310), a rotating sleeve (320), several worm cylinders (330) and several shaft pins (340). The rotating sleeve (320) is rotatably sleeved on the inner side of the bearing frame (110). Each of the worm cylinders (330) is sleeved on the surface of each shaft pin (340). A stop block (331) is provided on one side of the worm cylinder (330). The welding wire is pulled by the intermittent contact and reciprocating motion between the stop block (331) and the surface of the welding wire.

2. The continuous rough drawing device for stranded welding wire according to claim 1, characterized in that, The surface of the drawing frame (200) is detachably mounted with a fixing seat (210), and a plurality of drawing dies (220) are arranged along the axial direction of the drawing frame (200) through the fixing seat (210). The surface of the drawing die (220) is provided with a shaped hole (221), and the welding wire is drawn and shaped when it passes through the shaped hole (221).

3. The continuous rough drawing device for stranded welding wire according to claim 2, characterized in that, The piercing die (220) has a block structure and is coaxially arranged with the pulling traction assembly (300) and the bearing bracket (110). The shaped hole (221) has a conical hole structure. The piercing die (220) is a tungsten steel component.

4. The continuous rough drawing device for stranded welding wire according to claim 1, characterized in that, A drive motor (120) is fixedly installed on the inner side of the drawing machine base (100). One end of the rotating sleeve (320) is provided with a synchronous gear ring (321) that meshes with the surface of the transmission gear (341). The output end of the drive motor (120) drives the rotating sleeve (320) and the synchronous gear ring (321) to rotate through a belt drive component.

5. The continuous rough drawing device for stranded welding wire according to claim 1, characterized in that, The inner side of the fixed sleeve (310) is slidably installed with an inclined ring pad (311) fixedly sleeved on the outside of the shaft pin (340), and the two sides of the worm cylinder (330) are provided with inclined guide surfaces (332) that slide against the surface of the inclined ring pad (311).

6. The continuous rough drawing device for stranded welding wire according to claim 5, characterized in that, The inclined ring pad (311) is arranged on both sides of the worm cylinder (330). The inclined ring pad (311) has an inclined structure on the side facing the worm cylinder (330), and the inclined ring pad (311) rotates synchronously with the shaft pin (340) to push the worm cylinder (330) to make reciprocating axial movements during the rotation of the shaft pin (340).

7. The continuous rough drawing device for stranded welding wire according to claim 1, characterized in that, The surface of the pin (340) is provided with an eccentric part (342), the outer circumference of the eccentric part (342) is offset from the axis of the pin (340), and the worm cylinder (330) is rotatably sleeved on the outside of the eccentric part (342) so that when the pin (340) rotates, it drives the worm cylinder (330) to generate eccentric swing and intermittently contact the surface of the welding wire.

8. The continuous rough drawing device for stranded welding wire according to claim 1, characterized in that, The peristaltic tubes (330) are evenly arranged in a circumferential direction. The abutment blocks (331) on the surface of each peristaltic tube (330) are arranged radially opposite to the welding wire surface, and the ends of the abutment blocks (331) are provided with anti-slip teeth on the opposite welding wire surface. Adjacent abutment blocks (331) abut against each other and slide together.

9. The continuous rough drawing device for stranded welding wire according to claim 1, characterized in that, One end of each of the aforementioned pins (340) is fixedly sleeved with a transmission tooth (341). One end of the pin (340) meshes with the inner side of the synchronous gear ring (321) through the transmission tooth (341). The rotating sleeve (320) and the synchronous gear ring (321) are both provided with through holes for the welding wire to pass through at their shaft centers.

10. A method for continuous rough drawing of stranded welding wire, characterized in that, The method using the continuous rough drawing device for stranded welding wire as described in any one of claims 1-9 includes the following steps: S1. Multiple drawing machine bases (100) are arranged axially along the wire feeding direction to form a continuous arrangement of adjacent drawing frames (200), and drawing dies (220) with progressively smaller hole diameters are installed on the inner side of each drawing frame (200) to construct a continuous and progressive wire drawing channel. S2. By driving the motor (120) to synchronously drive and control several rotating sleeves (320), each rotating sleeve (320) is kept rotating at the same speed, thereby ensuring that the shaft pins (340) in each drawing traction assembly (300) run at the same speed, and avoiding speed difference between different drawing stations of the welding wire. S3. During the operation of the traction assembly (300), the welding wire is continuously conveyed. Under the periodic traction action of the worm gear (330), the welding wire passes through the holes (221) of the axially arranged and progressively smaller hole diameter of the drawing die (220) in sequence. During the process of passing through each hole (221), the drawing deformation is completed step by step, and the continuous rough drawing of the welding wire is realized. S4. Based on the specifications of the welding wire or the process requirements, the piercing die (220) in different drawing frames (200) is axially replaced or adjusted so that the hole diameter configuration of the piercing die (220) matches the requirements of the rough drawing process of the welding wire.

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