Wire drawing mechanism for steel cord

Abstract

The invention relates to the technical field of metal wire drawing, and discloses a wire drawing mechanism for a steel cord, which comprises an adjusting mechanism, the adjusting mechanism comprises a first mounting assembly and a tension swing assembly mounted on the first mounting assembly, the tension swing assembly comprises a mounting shaft, the mounting shaft is fixed on the first mounting assembly, and the tension swing assembly is fixed on the mounting shaft. A bearing is rotatably mounted on the outer ring of the first mounting assembly, a supporting plate is mounted on the outer wall of the bearing, an elastic shaft is arranged on the supporting plate, a tension swing shaft is mounted at the end, away from the bearing, of the supporting plate, and a tension swing wheel is rotatably mounted on the tension swing shaft. The tension spring is connected between the tension fixing shaft and the elastic shaft, and the bearing swings on the mounting shaft to drive the supporting plate to swing, so that the routing length of the drawn steel cord is changed, and the effect of counteracting the local stress of the drawn steel cord when the steel cord is drawn is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of metal wire drawing, and more particularly to a wire drawing mechanism for steel cords. Background Art

[0002] Steel cord is a composite wire made of multiple high-strength brass-plated steel wires twisted according to a precise geometric structure. It combines ultra-high strength, fatigue resistance and excellent adhesion to rubber. It is the "skeleton" material of automobile tire carcasses, belt layers and rubber hoses, giving tires load-bearing, impact resistance and durability.

[0003] Currently, the wet drawing process for steel cord on the market involves progressively reducing the diameter of the wire through multiple die passes to achieve the target diameter. In traditional technology, the compression rate for each pass is pre-set by the equipment parameters to ensure uniform deformation of the wire and avoid breakage.

[0004] However, in actual production, if an abnormality in a certain pass causes the actual compression rate of the single wire to be lower than the equipment setting value, the subsequent passes will have to bear deformation exceeding the design, causing local stress concentration.

[0005] Therefore, the present invention provides a wire drawing mechanism for a steel cord. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention aims to provide a wire drawing mechanism for steel cord.

[0007] To achieve the above object, the present invention provides the following technical solutions: A wire drawing mechanism for steel cord includes an adjusting mechanism, which includes a first mounting assembly and a tension swing assembly installed on the first mounting assembly. The tension swing assembly includes a mounting shaft, which is fixed to the first mounting assembly. A bearing is rotatably installed on the outer ring of the first mounting assembly, a support plate is installed on the outer wall of the bearing, an elastic shaft is provided on the support plate, a tension swing shaft is installed on the end of the support plate away from the bearing, a tension swing wheel is rotatably installed on the tension swing shaft, a tension fixing shaft is provided on the first mounting assembly, and a tension spring is connected between the elastic shaft and the tension fixing shaft.

[0008] The present invention is further configured as follows: the first mounting assembly includes a first mounting plate, and the mounting shaft and the tension fixing shaft are both fixed on the first mounting plate.

[0009] The present invention is further configured as follows: a first connecting plate is provided below one side of the first mounting plate, and first connecting holes are symmetrically provided on the first connecting plate.

[0010] The present invention is further configured as follows: the adjustment mechanism also includes a wire taking-up assembly and two fixing bolts, the wire taking-up assembly includes a wire taking-up shaft, a fixing piece is sleeved on the wire taking-up shaft, and a wire entry hole is provided at the upper end of the fixing piece.

[0011] The present invention is further configured as follows: a mounting groove is provided on the take-up shaft, fixing holes are symmetrically provided in the mounting groove, and the two fixing bolts are fitted into the two fixing holes.

[0012] The present invention is further configured as follows: a second mounting assembly is provided above the mounting slot, the second mounting assembly includes a second mounting plate, a second connecting plate is installed on one side below the second mounting plate, and second connecting holes are symmetrically provided on the second connecting plate.

[0013] The present invention is further configured as follows: the two first connecting holes and the second connecting holes are matched with each other, and the two fixing bolts pass through the first connecting hole and the second connecting hole respectively and are fixed to the two fixing holes.

[0014] The present invention is further configured as follows: the adjustment mechanism also includes a first fixing component and a second fixing component, the first fixing component is fixed to the first mounting plate, the second fixing component is fixed to the second mounting plate, and the first fixing component is within a circumference with the support plate as the diameter.

[0015] The present invention is further configured as follows: the first fixed assembly includes a first fixed shaft, the first fixed shaft is fixed to the first mounting plate, and a first rotating wheel is rotatably mounted on the first fixed shaft; the second fixed assembly includes a second fixed shaft, the second fixed shaft is fixedly mounted on the second mounting plate, and a second rotating wheel is rotatably mounted on the second fixed shaft.

[0016] The present invention is further configured to include: a first wire feed shaft, a second wire feed shaft, a third wire feed shaft, a fourth wire feed shaft, and a first rotating wheel and a second rotating wheel arranged between the second wire feed shaft and the third wire feed shaft, and a take-up wheel is provided on one side of the adjustment mechanism.

[0017] In summary, this application includes at least one of the following beneficial technical effects: By setting the positions of the tension fixing shaft and the elastic shaft, connecting the tension spring between the tension fixing shaft and the elastic shaft, the bearing swings on the installation shaft to drive the support plate to swing, so that the routing length of the drawn steel cord changes, thereby achieving the effect of offsetting the local stress of the drawn steel cord when the steel cord is drawn. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a wire drawing mechanism for steel cord in the present invention; Figure 2 for Figure 1Schematic diagram of the overall structure of the central regulating mechanism; Figure 3 for Figure 2 Schematic diagram of the explosion structure; Figure 4 for Figure 3 Schematic diagram of the overall structure of the medium tension swing assembly; Figure 5 for Figure 2 Top view of .

[0019] Description of reference numerals: 1, first inlet shaft; 2. Second inlet spool; 3. The first reel; 4. Second turning wheel; 5. The third inlet spool; 6. The fourth inlet spool; 7. Adjustment mechanism; 71. First mounting assembly; 711. First mounting plate; 712. First connecting plate; 713. First connecting hole; 714. First positioning hole; 715. Second positioning hole; 716. Third positioning hole; 72. First fixing assembly; 721. First fixing shaft; 722. First rotating wheel; 73. Tension swing assembly; 731. Mounting shaft; 732. Bearing; 733. Support plate; 734. Elastic shaft; 735. Tension spring 736, tension swing wheel; 737, tension swing shaft; 738, tension fixing shaft; 74, second fixing assembly; 741, second fixing shaft; 742, second rotating wheel; 75, second mounting assembly; 751, second mounting plate; 752, second connecting plate; 753, second connecting hole; 76, take-up assembly; 761, take-up shaft; 762, fixing member; 763, wire feed hole; 764, mounting slot; 765, fixing hole; 77, fixing bolt; 8. Take-up reel. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0022] See also Figure 1-5 , the present invention provides the following technical solutions: Example See Figure 1A wire drawing mechanism for steel cord includes a first wire feed shaft 1, a second wire feed shaft 2, a third wire feed shaft 5, a fourth wire feed shaft 6, and a first rotating wheel 3 and a second rotating wheel 4 arranged between the second wire feed shaft 2 and the third wire feed shaft 5, an adjusting mechanism 7 arranged on one side of the fourth wire feed shaft 6, and a take-up wheel 8 is arranged on one side of the adjusting mechanism 7.

[0023] The first wire feed spool 1, the second wire feed spool 2, the third wire feed spool 5 and the fourth wire feed spool 6 are all wire feed spools. The first wire feed spool 1 and the second wire feed spool 2 are responsible for the initial drawing, gradually drawing the thicker electroplated brass wire, controlling the compression ratio of the initial pass, and reducing the internal stress of the steel wire. The third wire feed spool 5 and the fourth wire feed spool 6 are responsible for the fine drawing at a higher speed, further refining the steel wire. At the same time, the straight line connecting the working surfaces of the first rotating wheel 3 and the second rotating wheel 4 makes the end working surfaces of the first wire feed spool 1 and the second wire feed spool 2 sections collinear with the first working surfaces of the third wire feed spool 5 and the fourth wire feed spool 6 sections, avoiding bending and deformation of the steel wire and reducing the loss of the copper plating layer. The first rotating wheel 3 and the second rotating wheel 4 serve as the transition of the wire turn.

[0024] The speed ratios among the first wire feed shaft 1, the second wire feed shaft 2, the third wire feed shaft 5 and the fourth wire feed shaft 6 are fixed and increase step by step (low speed → medium speed → high speed), thereby ensuring a smooth transition of the steel wire between the drawing sections. At the same time, emulsion cooling is used to reduce friction heat, thereby improving the drawing speed and the toughness of the steel wire and avoiding wire breakage during the wire drawing process. The adjustment mechanism 7 adds a tension wheel around the S line between the drawing passes, stabilizes the tension, and the swing amplitude of the tension wheel causes the length of the S line to change, thereby compensating for the risk of wire breakage due to insufficient compression rate in the drawing passes. Finally, the wire is taken up by the take-up wheel 8.

[0025] See Figure 2-Figure 5 The adjusting mechanism 7 includes a first mounting assembly 71 and a tension swing assembly 73 mounted on the first mounting assembly 71. The adjusting mechanism 7 also includes a wire take-up assembly 76 and two fixing bolts 77. The adjusting mechanism 7 also includes a first fixing assembly 72 and a second fixing assembly 74. The adjusting mechanism 7 adds an S-shaped wiring around the tension wheel between drawing passes. The first mounting assembly 71 provides an installation position for the tension swing assembly 73. The tension swing assembly 73 can be adaptively adjusted according to the current force of drawing the wire to avoid the wire from breaking due to excessive force of drawing the wire. The wire take-up assembly 76 provides an installation position for the first mounting assembly 71. The first mounting assembly 71 is fixed to the wire take-up assembly 76 by the fixing bolt 77. The angle difference formed between the first fixing assembly 72 and the tension swing assembly 73 makes the wire present an S-shaped wiring. The swing of the tension swing assembly 73 changes the wiring length of the S, thereby avoiding the situation where the compression rate of the drawing pass is insufficient.

[0026] The tension swing assembly 73 includes a mounting shaft 731, which is fixed on the first mounting assembly 71. A bearing 732 is rotatably mounted on the outer ring of the first mounting assembly 71. A support plate 733 is mounted on the outer wall of the bearing 732. An elastic shaft 734 is provided on the support plate 733. A tension swing shaft 737 is mounted on the end of the support plate 733 away from the bearing 732. A tension swing wheel 736 is rotatably mounted on the tension swing shaft 737. A tension fixing shaft 738 is provided on the first mounting assembly 71. A tension spring 735 is connected between the elastic shaft 734 and the tension fixing shaft 738.

[0027] The mounting shaft 731 limits the swing position of the support plate 733, the inner ring of the bearing 732 is fixed to the outer wall of the mounting shaft 731, the support plate 733 is fixed to the outer ring of the bearing 732, the tension swing shaft 737 is fixed on the support plate 733, the tension swing wheel 736 rotates on the tension swing shaft 737, the tension swing wheel 736 is an I-shaped wheel, when the steel wire passes over the tension swing wheel 736, the tension swing wheel 736 rotates to feed the wire, the tension fixing shaft 738 fixes the stretching distance of the tension spring 735, when the pressure of the steel wire is too large, the tensile elastic force of the tension spring 735 offsets the pulling pressure of the steel wire, thereby reducing the problem of steel wire breakage, and converting the instantaneous pulling pressure of the steel cord into controllable elastic potential energy, thereby achieving dynamic tension balance.

[0028] By setting the positions of the tension fixing shaft 738 and the elastic shaft 734, connecting the tension spring 735 between the tension fixing shaft 738 and the elastic shaft 734, the bearing 732 swings on the mounting shaft 731 to drive the support plate 733 to swing, so that the routing length of the drawn steel cord changes, thereby achieving the effect of offsetting the local stress of the drawn steel cord when the steel cord is drawn.

[0029] The first mounting assembly 71 includes a first mounting plate 711 , on which the mounting shaft 731 and the tension fixing shaft 738 are both fixed. The first mounting assembly 71 also includes a first positioning hole 714 , a second positioning hole 715 and a third positioning hole 716 .

[0030] The first mounting plate 711 provides an installation position for the tension swing assembly 73. The first mounting assembly 71 is the reference platform of the entire tension control system. The first fixed assembly 72 and the tension swing assembly 73 are installed on the first mounting plate 711 to form an S-shaped routing. The S-shaped routing design can effectively increase the wrap angle of the steel wire, thereby enhancing the stability of the tension control. The tension fixing shaft 738 locates the stretching position of the tension spring 735. The tension fixing shaft 738 ensures that the stretching distance of the tension spring 735 is always maintained in the optimal working range through precise positioning, so that during the operation of the steel wire, the elastic deformation of the spring is used to buffer the fluctuation of the tension. The mounting shaft 731 limits the swing position of the fixed support plate 733 to ensure that the support plate 733 moves smoothly within the preset range to avoid steel wire shaking or tension out of control due to excessive swinging.

[0031] A first connecting plate 712 is provided at the lower side of the first mounting plate 711, and a first connecting hole 713 is symmetrically provided on the first connecting plate 712; the wire taking-up assembly 76 includes a wire taking-up shaft 761, a fixing piece 762 is sleeved on the wire taking-up shaft 761, and a wire entry hole 763 is provided at the upper end of the fixing piece 762, a mounting groove 764 is provided on the wire taking-up shaft 761, and fixing holes 765 are symmetrically provided in the mounting groove 764, two fixing bolts 77 are matched with the two fixing holes 765, and a second mounting assembly 75 is provided above the mounting groove 764.

[0032] The first connecting plate 712 is a fixed platform, which fixes the installation position of the first mounting plate 711 and is positioned by inserting two fixing bolts 77 into the two first connecting holes 713. The take-up shaft 761 provides an installation position for the first mounting assembly 71 and the second mounting assembly 75 at the same time. The fixing piece 762 is fixed on the take-up shaft 761. There are circular through holes above and below the fixing piece 762. The circular through hole below the fixing piece 762 is fixed on the take-up shaft 761. The circular through hole inlet hole 763 above the fixing piece 762 passes through the drawn steel cord. The second mounting assembly 75 is fixed on the mounting groove 764, and cooperates with the two fixing bolts 77 through the two fixing holes 765. The first mounting assembly 71 and the second mounting assembly 75 are sequentially arranged below the two fixing bolts 77 and fixed in the fixing holes 765.

[0033] The second mounting assembly 75 includes a second mounting plate 751, a second connecting plate 752 is installed on one side below the second mounting plate 751, and second connecting holes 753 are symmetrically arranged on the second connecting plate 752. The two first connecting holes 713 and the second connecting holes 753 are matched with each other, and the two fixing bolts 77 pass through the first connecting hole 713 and the second connecting hole 753 respectively and are fixed to the two fixing holes 765.

[0034] The second mounting assembly 75 provides an installation position for the second fixing assembly 74. The second connecting plate 752 is arranged above the mounting groove 764. The positions of the two second connecting holes 753 correspond to the two fixing holes 765. The output ends of the two fixing bolts 77 first pass through the first connecting hole 713 and then pass through the second connecting hole 753 to be fixed in the fixing hole 765.

[0035] The first fixing assembly 72 is fixed on the first mounting plate 711, and the second fixing assembly 74 is fixed on the second mounting plate 751. The first fixing assembly 72 is within a circumference with the support plate 733 as the diameter. The first fixing assembly 72 includes a first fixing shaft 721, which is fixed to the first mounting plate 711, and a first rotating wheel 722 is rotatably mounted on the first fixing shaft 721. The second fixing assembly 74 includes a second fixing shaft 741, which is fixedly mounted on the second mounting plate 751, and a second rotating wheel 742 is rotatably mounted on the second fixing shaft 741.

[0036] The installation shaft 731 is fixed to the third positioning hole 716 , the first fixing shaft 721 is fixed to the first positioning hole 714 , and the tension fixing shaft 738 is fixed to the second positioning hole 715 .

[0037] The first rotating wheel 722 can rotate on the first fixed shaft 721. The first rotating wheel 722 is an I-shaped wheel. The steel wire is fed into the first fixed shaft 721 after being drawn by the fourth wire feed shaft 6. The second fixed shaft 741 is fixed on the second mounting plate 751. The second rotating wheel 742 can rotate on the second fixed shaft 741. The second rotating wheel 742 is an I-shaped wheel. After passing through the tension swing assembly 73, the steel wire is fed into the wire feed hole 763 through the second rotating wheel 742.

[0038] In the present invention, the maximum load of the tension spring 735 is in the range of 2.5*wire drawing tension to 1.2*wire drawing tension; The minimum displacement of the spring is greater than 10mm. During normal wire drawing, the wire moves in an S-shaped pattern, not a straight line. The experimental data are shown in Table 1: Drawing specification: 1.08~0.175NT Table 1 Comparison of drawing data before and after

[0039] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A wire drawing mechanism for steel cord, characterized in that: The invention comprises an adjusting mechanism (7), wherein the adjusting mechanism (7) comprises a first mounting assembly (71) and a tension swing assembly (73) mounted on the first mounting assembly (71), wherein the tension swing assembly (73) comprises a mounting shaft (731), wherein the mounting shaft (731) is fixed on the first mounting assembly (71), wherein the outer ring of the first mounting assembly (71) is rotatably mounted with a bearing (732), wherein a support plate (733) is mounted on the outer wall of the bearing (732), wherein an elastic shaft (734) is provided on the support plate (733), wherein a tension swing shaft (737) is mounted on one end of the support plate (733) away from the bearing (732), wherein a tension swing wheel (736) is rotatably mounted on the tension swing shaft (737), wherein a tension fixing shaft (738) is provided on the first mounting assembly (71), and a tension spring (735) is connected between the elastic shaft (734) and the tension fixing shaft (738).

2. A steel cord drawing mechanism according to claim 1, characterized in that: The first mounting assembly (71) comprises a first mounting plate (711), and the mounting shaft (731) and the tension fixing shaft (738) are both fixed on the first mounting plate (711).

3. A steel cord drawing mechanism according to claim 2, characterized in that: A first connecting plate (712) is provided below one side of the first mounting plate (711), and first connecting holes (713) are symmetrically provided on the first connecting plate (712).

4. A steel cord drawing mechanism according to claim 3, characterized in that: The regulating mechanism (7) further comprises a wire taking-up assembly (76) and two fixing bolts (77). The wire taking-up assembly (76) comprises a wire taking-up shaft (761). A fixing member (762) is sleeved on the wire taking-up shaft (761). A wire entry hole (763) is provided at the upper end of the fixing member (762).

5. A steel cord drawing mechanism according to claim 4, characterized in that: The take-up shaft (761) is provided with a mounting groove (764), and fixing holes (765) are symmetrically provided in the mounting groove (764), and the two fixing bolts (77) are arranged to fit in the two fixing holes (765).

6. A steel cord drawing mechanism according to claim 5, characterized in that: A second mounting assembly (75) is provided above the mounting groove (764), the second mounting assembly (75) comprising a second mounting plate (751), a second connecting plate (752) being installed on one side below the second mounting plate (751), and second connecting holes (753) being symmetrically provided on the second connecting plate (752).

7. A steel cord drawing mechanism according to claim 6, characterized in that: The two first connecting holes (713) and the second connecting hole (753) are arranged in a matching manner, and the two fixing bolts (77) pass through the first connecting hole (713) and the second connecting hole (753) respectively and are fixed to the two fixing holes (765).

8. The steel cord drawing mechanism according to claim 6, characterized in that: The adjustment mechanism (7) further comprises a first fixing assembly (72) and a second fixing assembly (74), wherein the first fixing assembly (72) is fixed on the first mounting plate (711), and the second fixing assembly (74) is fixed on the second mounting plate (751), and the first fixing assembly (72) is within a circumference with the support plate (733) as the diameter.

9. A steel cord drawing mechanism according to claim 8, characterized in that: The first fixing assembly (72) includes a first fixing shaft (721), the first fixing shaft (721) is fixed to the first mounting plate (711), and a first rotating wheel (722) is rotatably mounted on the first fixing shaft (721). The second fixing assembly (74) includes a second fixing shaft (741), the second fixing shaft (741) is fixedly mounted on the second mounting plate (751), and a second rotating wheel (742) is rotatably mounted on the second fixing shaft (741).

10. The steel cord drawing mechanism according to claim 1, characterized in that: It also includes a first wire feeding shaft (1), a second wire feeding shaft (2), a third wire feeding shaft (5), a fourth wire feeding shaft (6), and a first rotating wire wheel (3) and a second rotating wire wheel (4) arranged between the second wire feeding shaft (2) and the third wire feeding shaft (5). A wire take-up wheel (8) is arranged on one side of the adjustment mechanism (7).

Images