Continuous drawing machining mechanism for copper-plated steel wires

Abstract

The invention relates to the technical field of steel wire machining, in particular to a copper-plated steel wire continuous drawing machining mechanism which comprises an outer cylinder and a plurality of spinning balls, a steel wire coaxially penetrates through the outer cylinder, the inner wall of the outer cylinder is conical, and the spinning balls are rotationally arranged on the conical inner wall of the outer cylinder. The spinning ball does circular motion around the axis of the outer cylinder; a plurality of spinning balls capable of rotating and circularly moving are adopted to replace a traditional mode that the hole wall of a fixed die is in contact with a steel wire, traditional sliding friction can be converted into rolling friction, the friction coefficient is greatly reduced, energy consumption and traction force requirements in the drawing process are reduced, and the production efficiency is improved. Local high temperature of the mold caused by severe friction is effectively inhibited, and meanwhile, the rolling action can enable metal fluidity on the surface and inside of the steel wire to be more uniform, so that stress concentration and steel wire damage are avoided, and the machining quality is improved.

Description

A continuous drawing mechanism for copper-plated steel wire Technical Field

[0001] This invention relates to the technical field of steel wire processing, and in particular to a continuous drawing mechanism for copper-plated steel wire. Background Technology

[0002] Copper-plated steel wire is a composite metal material with a copper layer plated on the surface of a high-quality high-carbon steel core. It combines the high tensile strength of the steel core with the good conductivity, corrosion resistance and weldability of the copper layer, and is widely used in communication cables, power transmission, electronic component leads and metal product reinforcement.

[0003] In the production of steel wire products, drawing is a key process for achieving material sizing and performance optimization. Its basic principle is to force the wire blank through multiple, gradually decreasing drawing die holes using external force, utilizing the plastic deformation of the metal to reduce the wire cross-section and extend its length. However, traditional drawing processes often employ single-pass or multi-pass continuous sliding drawing, the core of which involves intense friction and compression between the steel wire and the drawing hole walls of the cemented carbide or diamond die. This rigid drawing method has significant process defects in practical applications. Firstly, due to the intense metal deformation and the constraint of the die compression zone and sizing zone, there is a difference in the metal flow rate between the surface and core of the steel wire. This uneven residual stress within the wire not only affects the adhesion of the subsequent plating and the winding performance, but can also cause brittle fracture of the wire during drawing or placement in severe cases. Secondly, the high-speed sliding friction between the wire and the die hole wall can easily cause mechanical damage such as scratches, abrasions, and even copper layer peeling on the wire surface, disrupting the continuity and density of the plating and directly affecting the conductivity and corrosion resistance of the product. On the other hand, the intense friction causes the die temperature to rise sharply, accelerating wear and fatigue in the die working area, shortening the die life, and requiring frequent shutdowns for replacement and repair, which seriously affects production continuity and dimensional tolerance consistency. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a continuous drawing mechanism for copper-plated steel wire. The specific technical solution adopted is as follows: The continuous drawing mechanism for copper-plated steel wire of the present invention includes an outer cylinder and a plurality of spinning balls. The steel wire passes through the outer cylinder coaxially. The inner wall of the outer cylinder is set in a conical shape. The plurality of spinning balls are rotatably arranged on the conical inner wall of the outer cylinder, and the spinning balls perform circumferential motion around the axis of the outer cylinder.

[0005] Furthermore, a spiral groove is provided on the conical inner wall of the outer cylinder, the spiral groove is coaxially arranged with the outer cylinder, and the spinning ball rolls in the spiral groove.

[0006] Furthermore, a guide tube is provided on the outer wall of the outer cylinder, and the two ends of the guide tube are respectively connected to the two ends of the spiral groove through two guide channels. The spinning ball circulates between the spiral groove, the guide channel and the guide tube.

[0007] Furthermore, a separator is provided between two adjacent spinning balls. The separator includes an annular retainer and a plurality of rotating bodies distributed in the circumferential direction of the retainer. The rotating bodies are rotatably disposed on the retainer.

[0008] Furthermore, the length of the guide tube can be adjusted.

[0009] Furthermore, the guide tube consists of a middle tube and two side tubes located at both ends of the middle tube. The side tubes are installed on the outer cylinder and communicate with the corresponding guide channels. The two side tubes are parallel to each other and perpendicular to the axis of the outer cylinder. The middle tube is movable along the length direction of the side tubes. The middle tube and the outer cylinder are connected by a spring. Several assembly strips are distributed in a ring between the ends of the middle tube and the ends of the side tubes. Adjacent assembly strips are slidably connected to each other, and adjacent assembly strips are respectively installed on the middle tube and the side tubes.

[0010] Furthermore, a notch is provided on the intermediate tube, and a flap is provided inside the notch.

[0011] Furthermore, the processing mechanism also includes an outer ring located on the outside of the outer cylinder and coaxially arranged with each other. The outer cylinder rotates within the outer ring, and a plurality of transmission wheels are rolled on the inner wall of the outer ring. A circular groove is formed on the circumferential outer wall of the outer cylinder, and a transmission ring is rotatably arranged within the circular groove. A guide groove is formed on the inner wall of the transmission ring, which is used in combination with a portion of the spiral groove inside the outer cylinder. The spinning ball is connected to the transmission ring through the guide groove, and the transmission ring is connected to the outer ring.

[0012] The beneficial effects of this invention are as follows: By replacing the traditional fixed die wall contact mode with steel wire by using several rotatable and circularly rotating spinning balls, the traditional sliding friction can be transformed into rolling friction, which greatly reduces the coefficient of friction. This not only reduces energy consumption and traction force requirements during the drawing process, but also effectively suppresses local high temperature of the die caused by severe friction. At the same time, this rolling action can make the metal flow on the surface and inside of the steel wire more uniform, avoid stress concentration and steel wire damage, and improve processing quality. Moreover, the reduction in steel wire diameter is achieved by the combined action of multiple independently rotating spinning balls. The load borne by a single spinning ball is small and the wear is uniform, thereby significantly reducing the frequency of downtime for die changes and improving the continuity of production and the stability of dimensional tolerances. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 is a structural schematic diagram of a continuous drawing mechanism for copper-plated steel wire; Figure 2 is a structural schematic diagram of the outer cylinder in Figure 1; Figure 3 is a structural schematic diagram of Figure 2 from another perspective; Figure 4 is a cross-sectional structural schematic diagram of the outer cylinder in Figure 3; Figure 5 is a structural schematic diagram of the partition in Figure 3; Reference numerals: 1. Outer cylinder; 2. Spinning ball; 3. Spiral groove; 4. Guide channel; 5. Guide tube; 6. Partition; 7. Cage; 8. Rotating body; 9. Intermediate tube; 10. Side tube; 11. Assembly strip; 12. Spring; 13. Flip cover; 14. Transmission ring; 15. Outer ring; 16. Transmission wheel. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0016] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 invention 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 limiting this invention.

[0017] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0018] As shown in Figures 1 to 5, a continuous drawing mechanism for copper-plated steel wire according to the present invention includes an outer cylinder 1 and a plurality of spinning balls 2. The steel wire passes through the outer cylinder 1 coaxially. The inner wall of the outer cylinder 1 is set in a conical shape. The plurality of spinning balls 2 are rotatably arranged on the conical inner wall of the outer cylinder 1, and the spinning balls 2 perform circular motion around the axis of the outer cylinder 1.

[0019] In this invention, the outer cylinder 1 can be set horizontally or vertically, and its specific setting is matched with the direction of steel wire conveying. The steel wire needs to pass through the outer cylinder 1 and be continuously conveyed. Since the inner wall of the outer cylinder 1 is conical, the several spinning balls 2 are also distributed in a conical form inside the outer cylinder 1. Thus, along the direction of steel wire conveying, the distance between each spinning ball 2 and the axis of the outer cylinder 1 will gradually decrease. This allows the spinning balls 2 to be used to extrude the surface of the steel wire. The several spinning balls 2 can contact the surface of the steel wire at multiple locations. When the steel wire is conveyed, the coverage areas of the several spinning balls 2 on the surface of the steel wire are interlaced and combined, thereby achieving full coverage of the surface of the steel wire.

[0020] In use, the steel wire is pulled through the outer cylinder 1 by an external traction machine and continuously conveyed. Several spinning balls 2 inside the outer cylinder 1 come into contact with the surface of the steel wire. The spinning balls 2 move relative to the surface of the steel wire, and the steel wire drives the spinning balls 2 to rotate using friction. This achieves a rolling and squeezing mode on the surface of the steel wire by several spinning balls 2, reducing the friction during the steel wire drawing process. The conical arrangement of several spinning balls 2 can make the diameter of the steel wire gradually decrease. At the same time, the arrangement of the spinning balls 2 to move in a circle around the axis of the outer cylinder 1 can make the spinning balls 2 achieve full rolling and drawing processing on the outer wall of the steel wire in the circumferential direction, thereby increasing the area of ​​the rolling trajectory of each spinning ball 2 on the surface of the steel wire and increasing the overlap area between several spinning balls 2.

[0021] By replacing the traditional fixed die wall contact mode with several rotatable and circularly rotating spinning balls 2, the traditional sliding friction can be transformed into rolling friction, which greatly reduces the coefficient of friction. This not only reduces energy consumption and traction force requirements during the drawing process, but also effectively suppresses local high temperature in the die caused by severe friction. At the same time, this rolling action can make the metal flow on the surface and inside of the wire more uniform, avoid stress concentration and wire damage, and improve processing quality. Moreover, the reduction in wire diameter is achieved through the combined action of multiple independently rotating spinning balls 2. The load borne by a single spinning ball 2 is small and the wear is uniform, which significantly reduces the frequency of downtime for die changes and improves the continuity of production and the stability of dimensional tolerances.

[0022] Furthermore, a spiral groove 3 is provided on the conical inner wall of the outer cylinder 1. The spiral groove 3 is coaxially arranged with the outer cylinder 1, and the spinning ball 2 rolls in the spiral groove 3.

[0023] When the steel wire passes through the outer cylinder 1, the friction between the steel wire and the spinning ball 2 drives the spinning ball 2 to roll in the spiral groove 3. The shape of the spiral groove 3 causes the spinning ball 2 to move both along the axial direction and along the circumference of the outer cylinder 1. This allows the spinning ball 2 to perform a single motion and achieve rolling extrusion processing on the steel wire. When the spinning ball 2 moves in the spiral groove 3, it is also in a rolling mode relative to the inner wall of the spiral groove 3. This reduces the friction between the spinning ball 2 and the outer cylinder 1.

[0024] Compared to the method where the spinning ball 2 is directly mounted on the inner wall of the outer cylinder 1 and the rotation of the outer cylinder 1 drives the spinning ball 2 to move in a circular motion, the above method is simpler in both structure and motion.

[0025] Furthermore, a guide tube 5 is provided on the outer wall of the outer cylinder 1. The two ends of the guide tube 5 are connected to the two ends of the spiral groove 3 through two guide channels 4 respectively. The spinning ball 2 circulates between the spiral groove 3, the guide channels 4 and the guide tube 5.

[0026] Both guide channels 4 are located inside the outer cylinder 1. Since the two guide channels 4 are used in conjunction with the two ends of the spiral groove 3, the positions of the two guide channels 4 inside the outer cylinder 1 are offset from each other and the directions are opposite. The guide tube 5 needs to be set at an angle relative to the axis of the outer cylinder 1. When the spinning ball 2 rolls from one end of the spiral groove 3 to the other end, the spinning ball 2 enters the guide tube 5 through the corresponding guide channel 4. The guide tube 5 guides the spinning ball 2 back to the initial position of the spiral groove 3, thereby making the spinning ball 2 circulate in the spiral groove 3, the two guide channels 4 and the guide tube 5, realizing the continuous processing mode of wire drawing.

[0027] Furthermore, a separator 6 is provided between two adjacent spinning balls 2. The separator 6 includes a ring-shaped retainer 7 and a plurality of rotating bodies 8 distributed in the circumferential direction of the retainer 7. The rotating bodies 8 are rotatably disposed on the retainer 7.

[0028] Since the spinning balls 2 roll in the same direction when they roll in the helical groove 3, if two adjacent spinning balls 2 come into contact with each other, they will rub against each other and hinder the normal rolling of the spinning balls 2. At the same time, the friction will cause the spinning balls 2 to heat up and affect their lifespan. The separator 6 can separate the two adjacent spinning balls 2 to avoid friction. Due to the shape characteristics of the spinning balls 2, when the retainer 7 is located between two adjacent spinning balls 2, the two adjacent spinning balls 2 will squeeze the retainer 7 through the several rotating bodies 8 on the retainer 7, so that the retainer 7 and the several rotating bodies 8 on it are restricted between the two adjacent spinning balls 2, thereby preventing the separator 6 from falling off. Due to the characteristics of the rotation direction of the spinning balls 2, the rotating bodies 8 on the retainer 7 can be set to two, or to six or other numbers as shown in Figure 5, as long as the plane of the rotation trajectory of the rotating bodies 8 on the retainer 7 is not perpendicular to the plane of the rotation trajectory of the spinning balls 2.

[0029] When a spinning ball 2 rolls and drives the rotating body 8 to rotate, the rotating body 8 will drive the adjacent spinning balls 2 to move synchronously, thereby improving the synchronization of several spinning balls 2 when they roll. In actual operation, since the rolling trajectory of the spinning ball 2 is a spiral cone, there will be a small difference in speed between two adjacent spinning balls 2. This difference will not affect the operation of the overall structure.

[0030] Furthermore, the length of the guide tube 5 can be adjusted.

[0031] To ensure that adjacent spinning balls 2 and the separator 6 between them are in close contact and that several spinning balls 2 are more compact, the movement path of the spinning balls 2 can be shortened by adjusting the length of the guide tube 5.

[0032] Furthermore, the guide tube 5 consists of a middle tube 9 and two side tubes 10 located at both ends of the middle tube 9. The side tubes 10 are installed on the outer cylinder 1 and connected to the corresponding guide channel 4. The two side tubes 10 are parallel to each other and perpendicular to the axis of the outer cylinder 1. The middle tube 9 is movable along the length of the side tubes 10. The middle tube 9 and the outer cylinder 1 are connected by a spring 12. Several assembly strips 11 are distributed in a ring between the ends of the middle tube 9 and the ends of the side tubes 10. Adjacent assembly strips 11 are slidably connected to each other, and adjacent assembly strips 11 are respectively installed on the middle tube 9 and the side tubes 10.

[0033] The assembly strips 11 between the end of the intermediate tube 9 and the end of the side tube 10 can form a channel for the movement of the spinning balls 2. When the intermediate tube 9 moves relative to the outer cylinder 1, the assembly strips 11 on the intermediate tube 9 and the assembly strips 11 on the side tube 10 will slide relative to each other. At this time, the length of the channel formed by the assembly strips 11 changes, thereby realizing the function of adjusting the length of the guide tube 5. The spring 12 can provide elastic tension to the intermediate tube 9, so that the guide tube 5 maintains the tendency of shortening movement, thus always providing compact force for the spinning balls 2.

[0034] Furthermore, a notch is provided on the intermediate tube 9, and a flap 13 is provided inside the notch.

[0035] The flip cover 13 can be installed on the notch by hinge or bolt fastening. At this time, the inside of the intermediate tube 9 has a complete channel, and the spinning ball 2 can move smoothly inside the intermediate tube 9. When some of the spinning balls 2 are damaged, the damaged spinning ball 2 can be moved to the notch position and the flip cover 13 can be opened to replace the spinning ball 2.

[0036] Furthermore, the processing mechanism also includes an outer ring 15 located on the outside of the outer cylinder 1 and coaxially arranged with each other. The outer cylinder 1 rotates within the outer ring 15, and a plurality of transmission wheels 16 are rolled on the inner wall of the outer ring 15. A circular groove is formed on the circumferential outer wall of the outer cylinder 1, and a transmission ring 14 is rotatably arranged within the circular groove. A guide groove is formed on the inner wall of the transmission ring 14, which is used in combination with a portion of the spiral groove 3 inside the outer cylinder 1. The spinning ball 2 is connected to the transmission ring 14 through the guide groove, and the transmission ring 14 is connected to the outer ring 15.

[0037] The outer cylinder 1 can be rotatably mounted on the inner wall of the outer ring 15 via a slider or other structure, and the rotation of the outer cylinder 1 can be powered by a motor.

[0038] When the outer cylinder 1 is stationary, the steel wire passes through the outer cylinder 1 and drives the spinning ball 2 to roll. At this time, since the rolling trajectory of the spinning ball 2 is a spiral cone, the spinning ball 2 will provide a small reaction force to the steel wire in the circumferential direction of the steel wire. This reaction force will drive the spinning ball 2 to twist, causing the steel wire to deform during the drawing process. To overcome this phenomenon, the outer cylinder 1 can be actively driven to rotate by a motor. The outer cylinder 1 drives the transmission wheel 16 to roll in the outer ring 15. At the same time, the outer ring 15 drives the transmission ring 14 to rotate. The transmission ring 14 drives some of the spinning balls 2 in the spiral groove 3 to rotate actively, thereby enabling the spinning ball 2 to provide a stable rolling force to the steel wire in the circumferential direction of the steel wire.

[0039] The active rotation of the outer cylinder 1 also increases the relative speed of the spinning ball 2 and the steel wire along the circumference of the steel wire, thereby improving the smoothness of the steel wire surface during rolling.

[0040] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A continuous drawing mechanism for copper-plated steel wire, characterized in that, It includes an outer cylinder and several spinning balls. A steel wire coaxially passes through the outer cylinder. The inner wall of the outer cylinder is set in a conical shape. The spinning balls are rotatably disposed on the conical inner wall of the outer cylinder, and the spinning balls perform circular motion around the axis of the outer cylinder.

2. The continuous drawing mechanism for copper-plated steel wire according to claim 1, characterized in that, A spiral groove is provided on the conical inner wall of the outer cylinder, and the spiral groove is coaxially arranged with the outer cylinder, and the spinning ball rolls in the spiral groove.

3. The continuous drawing mechanism for copper-plated steel wire according to claim 2, characterized in that, A guide tube is provided on the outer wall of the outer cylinder. The two ends of the guide tube are connected to the two ends of the spiral groove through two guide channels respectively. The spinning ball circulates between the spiral groove, the guide channel and the guide tube.

4. The continuous drawing mechanism for copper-plated steel wire according to claim 3, characterized in that, A separator is provided between two adjacent spinning balls. The separator includes an annular retainer and a plurality of rotating bodies distributed in the circumferential direction of the retainer. The rotating bodies are rotatably disposed on the retainer.

5. The continuous drawing mechanism for copper-plated steel wire according to claim 4, characterized in that, The length of the guide tube can be adjusted.

6. The continuous drawing mechanism for copper-plated steel wire according to claim 5, characterized in that, The guide tube consists of a middle tube and two side tubes located at both ends of the middle tube. The side tubes are installed on the outer cylinder and communicate with the corresponding guide channels. The two side tubes are parallel to each other and perpendicular to the axis of the outer cylinder. The middle tube is movable along the length of the side tubes. The middle tube and the outer cylinder are connected by a spring. Several assembly strips are distributed in a ring between the ends of the middle tube and the ends of the side tubes. Adjacent assembly strips are slidably connected to each other, and adjacent assembly strips are respectively installed on the middle tube and the side tubes.

7. The continuous drawing mechanism for copper-plated steel wire according to claim 6, characterized in that, A notch is provided on the intermediate tube, and a flip cover is provided inside the notch.

8. The continuous drawing mechanism for copper-plated steel wire according to claim 7, characterized in that, The processing mechanism also includes an outer ring located outside the outer cylinder and coaxially arranged with each other. The outer cylinder rotates within the outer ring, and a plurality of transmission wheels are rolled on the inner wall of the outer ring. A circular groove is formed on the circumferential outer wall of the outer cylinder, and a transmission ring is rotatably arranged within the circular groove. A guide groove is formed on the inner wall of the transmission ring, which is used in combination with a portion of the spiral groove inside the outer cylinder. The spinning ball is connected to the transmission ring through the guide groove, and the transmission ring is connected to the outer ring.

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