Low-residual-torsion-value tire bead steel wire drawing production device and method

Abstract

The invention relates to a low-residual-torsion-value tire bead steel wire drawing production device and method, and belongs to the technical field of steel wire drawing machining. The low-residual-torsion-value tire bead steel wire drawing production device sequentially comprises a rotary mold device, a heat treatment device, a straightening device and a lead pan tempering device from front to back; the rotating mold device comprises a mold mounting seat and a rotating mold, the straightening device comprises a straightening wheel assembly, the straightening wheel assembly is provided with a straightening wheel capable of moving back and forth, the lead pan tempering device comprises a lead pan, an input driving wheel and a temporary storage device are arranged at the input end of the lead pan, and an output driving wheel is arranged at the output end of the lead pan; the internal stress of the steel wire is effectively released through the rotating die device, the heat treatment device avoids various adverse phenomena such as crossing and doubling of the steel wire, the straightening device further controls the residual torsion value of the steel wire, and the lead pan tempering device improves the tempering treatment efficiency of the steel wire and is beneficial to eliminating the residual internal stress of the steel wire; through improvement of multiple procedures, the residual torsion value of the steel wire is reduced, and the straightness of a product is improved.

Description

TECHNICAL FIELD

[0001] The application relates to a low-residual-torsion-value tire bead wire drawing production device and method, and belongs to the technical field of wire drawing. BACKGROUND

[0002] In a steel wire framework material of a radial tire, the function of a tire bead is to fix the tire on a rim to ensure the firmness of the tire during vehicle operation, and to increase the dispersion of side force during the operation of the tire on a road surface to ensure the service life of the tire; the tire bead is formed by winding a steel wire in rubber material, and the weight of the steel wire accounts for more than 85%, and the steel wire is a high-carbon bronze-plated steel wire; the steel wire is fixed and bonded with the rubber together through a vulcanization reaction of a chemical plating layer on the surface of the steel wire and the rubber, and then the device is fixed to form a ring shape.

[0003] During the ring forming process, the straightness of the steel wire has a great influence on the ring forming, and under the condition of poor or unstable straightness, the steel wire may be deflected after ring forming, and the tire bead is irregularly formed, and the residual torsion value of the whole disc winding of the steel wire has a great influence on the stability of the straightness, and the residual torsion value is an index for showing the size of the eccentric force of the whole steel wire during winding into a disc, which is affected by the wire drawing process, the use of the drawing die, the lubrication effect of the wire drawing, the heat treatment process control and other aspects. At present, the residual torsion of the tire bead wire in China, especially the steel wire with a wire diameter of less than 1 mm, is quite cumbersome to adjust, and the stability of the residual torsion value cannot be effectively controlled, thereby affecting the straightness of the product. SUMMARY

[0004] According to the defects in the prior art, the technical problem to be solved by the application is to provide a low-residual-torsion-value tire bead wire drawing production device and method, which reduces the residual torsion value of the steel wire and improves the straightness of the product through improvement of multiple processes.

[0005] The low-residual-torsion-value tire bead wire drawing production device comprises, from front to back, a rotating die device, a heat treatment device, a straightening device and a lead pot tempering device. The rotating die device comprises a die mounting seat and a rotating die, and the rotating die is rotationally connected with the die mounting seat; the die mounting seat is provided with a wire drawing powder chamber and a cooling chamber, the wire drawing powder chamber is filled with wire drawing powder, the steel wire to be drawn is lubricated by the wire drawing powder to ensure smooth wire drawing; the rotating die is located in the cooling chamber, and the cooling chamber is externally connected with a cooling liquid through a pipeline, and the rotating die is cooled by the cooling liquid to avoid failure of the rotating die due to high temperature; A worm is rotatably connected to the mold mounting seat, one end of which is transmission-connected to the mold rotating motor. A worm wheel is sleeved on the rotating mold, and the worm wheel and the worm are meshed with each other. The mold rotating motor can drive the worm to rotate, and then the worm wheel is driven to rotate by the worm, thereby rotating the rotating mold. The straightening device includes at least eight sets of straightening wheel assemblies with the same structure. The straightening wheel assemblies are arranged in two columns and multiple rows and are mirror-mounted on the straightening workbench. The two straightening wheel assemblies in each row form a pair, and the mutually spaced teams form a group, with two groups in total. The straightening wheel assemblies are provided with straightening wheels that can move forward and backward. The straightening wheel assemblies in each group cooperate with each other to straighten the steel wire. The two groups work alternately. When one group is straightening the steel wire, the other group can be replaced or repaired without stopping production, thereby preventing continuous wear of the straightening wheels from affecting the straightness of the steel wire. The straightening wheels are V-grooved wheels. The lead pot tempering device includes a lead pot, and an input drive wheel and a temporary storage device are provided at the input end of the lead pot. The temporary storage device is located between the input drive wheel and the lead pot. The temporary storage device is used to temporarily store the steel wire sent by the input drive wheel, extend the residence time of the front steel wire in the lead pot, improve the tempering treatment effect, eliminate the internal stress of the steel wire, and further reduce the residual torsion value of the steel wire; the output end of the lead pot is provided with an output drive wheel, and the input drive wheel and the output drive wheel are both driven to rotate by a motor. The speed of the output drive wheel is higher than that of the input drive wheel, and the input drive wheel and the output drive wheel can pull the steel wire; the rear side of the lead pot tempering device is also provided with an integrated measurement and adjustment device for detecting and adjusting the tension of the steel wire.

[0006] Preferably, a stirring motor is also fixed on one side of the mold mounting seat, and the stirring motor is connected to the stirring rod. The stirring rod is rotatably set on the mold mounting seat, and the stirring rod passes through a side wall panel of the drawing powder chamber; the stirring motor can drive the stirring rod to rotate and stir the drawing powder in the drawing powder chamber to avoid the drawing powder from clumping.

[0007] Preferably, the straightening wheel assembly includes a cylinder, which is fixedly connected to the straightening workbench through a cylinder mounting seat, a movable support is fixed to the head end of the cylinder rod, and a straightening wheel is rotatably set on the top of the movable support; the two sides of the movable support are slidably connected to the cylinder mounting seat through guide rods, and the movable support is guided and limited by the guide rods to avoid vibration when the straightening wheel moves back and forth.

[0008] Preferably, the heat treatment device includes a heat treatment open flame furnace, and a wire separation rack is fixed inside the heat treatment open flame furnace. The wire separation rack can separate the steel wires from each other to avoid the occurrence of steel wire crossing and wire paralleling, so that the internal structure transformation of the steel wire after heat treatment is more stable, thereby reducing the residual stress of the steel wire after heat treatment, which is conducive to further drawing treatment; The filleting frame comprises a fixing frame, a plurality of filleting plates are arranged on the fixing frame in an array, a plurality of through holes for allowing the steel wires to pass through are formed in the filleting plates, and the through holes at corresponding positions on the filleting plates are coaxially arranged.

[0009] Preferably, a plurality of sets of guide wheels are fixed in the lead pot, and the guide wheels are arranged alternately in the up and down directions to increase the extension distance of the steel wire in the lead pot.

[0010] The low-residual-torsion-value bead wire drawing production method comprises the following steps: S1, when the steel wire enters the rotating die device and passes through the drawing powder chamber, drawing powder for lubrication is adhered to the surface of the steel wire; then the steel wire enters the rotating die, the internal residual stress is effectively released through the extrusion deformation of the rotating die, the internal residual bias force of the steel wire is eliminated, and the wire diameter deviation of the steel wire during drawing is reduced; the rotating die can also avoid the rapid wear of the die due to continuous local stress, thereby prolonging the service life of the die; The height of the sizing belt of the rotating die is determined by the working zone angle 2β, the outlet angle 2γ and the target diameter of the steel wire The control is performed, and the specific steps are as follows: S11, a conical grinding needle with a cone angle of 2β is used to grind the working zone of the rotating die into a cone, and the minimum diameter of the cone is , The calculation formula is:

[0011] wherein, is the target diameter of the steel wire to be produced, β is half of the working zone angle, and is 10° according to experience; γ is half of the outlet angle, and is 30° according to experience; S12, a cylindrical grinding needle with a diameter of is used to grind the working zone of the rotating die again, so as to obtain a sizing belt with a diameter of and a height of h; S2, after the steel wire is drawn, the steel wire enters the heat treatment device for heat treatment; during the heat treatment process, the steel wire passes through the filleting frame, the filleting frame separates the steel wires in the furnace from each other, avoids various adverse phenomena such as crossing and wire merging of the steel wires, makes the internal organization of the steel wire after heat treatment more stable, thereby reducing the residual stress of the steel wire after heat treatment, and is beneficial to subsequent processing; S3, the heat-treated steel wire enters a straightening device, and the straightening device controls the residual torsion of the steel wire; according to the specification of the steel wire, a corresponding groove width and V-shaped groove angle of the straightening wheel are designed to further control the residual torsion value of the steel wire; Each set of straightening wheel assemblies cooperates with each other to straighten the steel wire, and two sets work alternately, one set straightens the steel wire, and the other set is in an idle state. When the working straightening wheel assembly needs to be replaced, the cylinder of the idle straightening wheel assembly acts to make the corresponding straightening wheel close to the steel wire. Then the cylinder of the working straightening wheel assembly makes the corresponding straightening wheel away from the steel wire, and then the straightening wheel is replaced or repaired. The straightening wheel can be replaced or repaired without stopping production, which avoids affecting the straightness of the steel wire due to continuous wear of the straightening wheel and avoids affecting normal production; S4, the straightened steel wire enters a lead pot tempering device, and sequentially passes through an input drive wheel, a temporary storage device, a plurality of guide wheels and an output drive wheel to perform a 400-degree or more tempering treatment on the steel wire to eliminate internal stress and keep the residual torsion of the steel wire stable. The input drive wheel continuously pulls the steel wire at a constant speed, the output drive wheel intermittently runs at a higher speed than the input drive wheel, and the lifting wheel of the temporary storage device reciprocates up and down.

[0012] Preferably, in step S3, the groove width of the straightening wheel is designed as follows: A straightening wheel with a V-shaped angle of 90° is selected, the groove width of the straightening wheel is L, the diameter of the steel wire is D, the angle between the line connecting the center of the steel wire to the edge of one side of the V-shaped groove of the straightening wheel and the center plane of the straightening wheel is α, and according to previous production experience, the value of α is in the range of 60°≤α≤80°, then: tanα=

[0013] Therefore, 1.732≤ ≤5.67, and the calculation result is: 1.72D≤L≤3.35D, that is, the value range of the groove width L.

[0014] Preferably, in step S4, when the output drive wheel stops, the lifting wheel of the temporary storage device moves downward under the action of the lifting motor, so that the length of the steel wire between the input drive wheel and the lead pot becomes longer, the steel wire is temporarily stored, and the steel wire in the lead pot does not move at this time. When the lifting wheel moves to the lower detection position of the lifting support, the output drive wheel acts to pull the steel wire in the lead pot forward, and at the same time, the lifting motor reverses to drive the lifting wheel to move upward to cooperate with the pulling action of the output drive wheel until the lifting wheel moves to the upper detection position of the lifting support. At this time, the steel wire is in a straight state, the temporarily stored steel wire is completely consumed, the output drive wheel stops again, and the next cycle is entered; This movement mode prolongs the residence time of the steel wire in the lead pot, improves the tempering efficiency, and is beneficial to eliminating the internal stress of the steel wire; at the same time, when the steel wire in the lead pot is suddenly started, it has a certain acceleration, can shake off the molten drawing powder attached to the surface of the steel wire, reduce the surface residue, and avoid the influence on the subsequent process.

[0015] Compared with the prior art, the present application has the beneficial effects of: The low-residual torsion value bead wire drawing production device and method disclosed by the present application effectively releases the internal stress of the steel wire through the reasonably designed rotary die device, avoids various adverse phenomena such as crossing and wire combining of the steel wire through the heat treatment device, further controls the residual torsion value of the steel wire through the straightening device, improves the tempering efficiency of the steel wire through the lead pot tempering device, and is beneficial to eliminating the residual internal stress of the steel wire; through the improvement of multiple processes, the present application reduces the residual torsion value of the steel wire and improves the flatness of the product. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structure diagram of the rotary die device; Figure 2 is a sectional view of the rotary die device; Figure 3 is a sectional view of the heat treatment device; Figure 4 is a structure diagram of the straightening device; Figure 5 is a working principle diagram of the lead pot tempering device and tension measurement and adjustment integrated device; Figure 6 is a front view of the temporary storage device; Figure 7 is a structure diagram of the tension measurement and adjustment integrated device; Figure 8 is a working state diagram of the straightening wheel; Figure 9 is a sectional view of the rotary die after step S11 processing; Figure 10 is a sectional view of the rotary die after step S12 processing.

[0017] Figure: 1. Rotating mold device; 11. Rotating mold; 12. Mold mounting base; 121. Drawing powder chamber; 122. Cooling chamber; 13. Stirring rod; 14. Stirring motor; 15. Mold rotating motor; 16. Worm; 17. Worm gear; 2. Heat treatment device; 21. Heat treatment open flame furnace; 22. Wire separation rack; 221. Fixed rack; 222. Wire separation plate; 3. Straightening device; 31. Straightening workbench; 32. Straightening wheel assembly; 321. Straightening wheel; 322. Movable support; 323. Cylinder installation Seat; 324, cylinder; 4, lead pot tempering device; 41, input drive wheel; 42, temporary storage device; 421, lifting motor; 422, lifting bracket; 423, lead screw; 424, nut seat; 425, lifting wheel; 43, guide wheel; 44, lead pot; 45, output drive wheel; 5, integrated measurement and adjustment device; 51, tensioning wheel group; 52, spring; 53, guide rail slider assembly; 54, tensioning support; 55, electric cylinder; 56, sliding plate; 57, pressure sensor; 58, guide column; 6, steel wire. DETAILED DESCRIPTION

[0018] Example 1 like Figures 1-7 As shown, the dry-type drawing steel wire surface residue removal device of this embodiment includes, from front to back, a rotating die device 1, a heat treatment device 2, a straightening device 3, and a lead pot tempering device 4; The rotary mold device 1 includes a mold mounting base 12 and a rotary mold 11, and the rotary mold 11 is rotatably connected to the mold mounting base 12; the mold mounting base 12 is provided with a drawing powder chamber 121 and a cooling chamber 122, the drawing powder chamber 121 is filled with drawing powder, and the steel wire 6 to be drawn is lubricated by the drawing powder to ensure smooth drawing of the steel wire 6; the rotary mold 11 is located in the cooling chamber 122, and the cooling chamber 122 is externally connected to a coolant through a pipeline, and the coolant is used to cool the rotary mold 11 to prevent the rotary mold 11 from failing due to high temperature; A worm 16 is rotatably connected to the mold mounting base 12, one end of which is in transmission connection with the mold rotating motor 15. A worm gear 17 is sleeved on the rotating mold 11, and the worm gear 17 and the worm 16 are meshed with each other. The mold rotating motor 15 can drive the worm 16 to rotate, and then the worm 16 drives the worm gear 17 to rotate, thereby rotating the rotating mold 11. The straightening device 3 comprises at least eight sets of straightening wheel assemblies 32 which are arranged in two rows and multiple columns and are mirror installed on the straightening workbench 31; two straightening wheel assemblies 32 in each row form a pair, and each pair is spaced apart to form a group, and there are two groups in total; the straightening wheel assembly 32 is provided with a straightening wheel 321 which can move forward and backward, and the straightening wheel assemblies 32 in each group cooperate with each other to straighten the steel wire 6, and the two groups work alternately, so that one group can be replaced or repaired without stopping production when the other group is straightening the steel wire 6, thereby avoiding the continuous wear of the straightening wheel 321 and affecting the flatness of the steel wire 6; the straightening wheel 321 is a V-shaped groove wheel; The lead pot tempering device 4 comprises a lead pot 44, the input end of the lead pot 44 is provided with an input driving wheel 41 and a temporary storage device 42, the temporary storage device 42 is located between the input driving wheel 41 and the lead pot 44, and the temporary storage device 42 is used for temporarily storing the steel wire 6 sent by the input driving wheel, prolonging the residence time of the front-end steel wire 6 in the lead pot 44, improving the tempering treatment effect, eliminating the internal stress of the steel wire 6, and further reducing the residual torsion value of the steel wire 6; the output end of the lead pot is provided with an output driving wheel 45, the input driving wheel 41 and the output driving wheel 45 are both driven to rotate by a motor, the rotating speed of the output driving wheel 45 is higher than that of the input driving wheel 41, and the input driving wheel 41 and the output driving wheel 45 can pull the steel wire 6; the rear side of the lead pot tempering device 4 is also provided with a measuring and adjusting integrated device 5 for detecting and adjusting the tension of the steel wire.

[0019] In the embodiment, one side of the mold mounting seat 12 is also fixed with a stirring motor 14, the stirring motor 14 is in transmission connection with the stirring rod 13, the stirring rod 13 is rotationally arranged on the mold mounting seat 12, and the stirring rod 13 penetrates through one side wall plate of the wire drawing powder chamber 121; the stirring motor 14 can drive the stirring rod 13 to rotate, so as to stir the wire drawing powder in the wire drawing powder chamber 121, thereby avoiding the caking of the wire drawing powder.

[0020] The straightening wheel assembly 32 comprises a gas cylinder 324, the gas cylinder 324 is fixedly connected with the straightening workbench 31 through a gas cylinder mounting seat 323, a movable support 322 is fixed to the first end of the gas cylinder rod, and the straightening wheel 321 is rotationally arranged on the top of the movable support 322; the movable support 322 is slidably connected with the gas cylinder mounting seat 323 through guide rods, the movable support 322 is guided and limited through the guide rods, and vibration of the straightening wheel 321 during forward and backward movement is avoided.

[0021] The heat treatment device 2 comprises a heat treatment open flame furnace 21, and the heat treatment open flame furnace 21 is internally fixed with a wire separating frame 22; the wire separating frame 22 can separate the steel wires 6 from each other, so as to avoid the crossing and merging of the steel wires 6, make the internal organization of the steel wires 6 more stable after heat treatment, thereby reducing the residual stress of the steel wires 6 after heat treatment, and facilitating further drawing treatment; The filament separating frame 22 comprises a fixing frame 221, and a plurality of filament separating plates 222 are arranged on the fixing frame 221 in an array, and a plurality of through holes for allowing the steel wires 6 to pass through are formed in the filament separating plates 222, and the through holes in the corresponding positions of the filament separating plates 222 are coaxially arranged.

[0022] The lead pot 44 is provided with a plurality of sets of guide wheels 43, and the guide wheels 43 in each set are arranged alternately in the up-down direction to increase the extension distance of the steel wires 6 in the lead pot 44; the temporary storage device 42 comprises a lifting support 422, a lifting wheel 425 is movably arranged on the lifting support 422, a lifting motor 421 is installed at the top of the lifting support 422, lead screws 423 are installed on the two sides of the lifting support 422, a nut seat 424 is drivenly arranged on the lead screws 423, and the wheel shafts of the lifting wheel 425 are fixedly connected with the nut seats 424 on the two sides.

[0023] The tensioning and adjusting integrated device 5 comprises a tensioning support 54, an electric cylinder 55 is fixedly arranged on the tensioning support 54, a first end of a cylinder rod of the electric cylinder 55 is fixedly connected with a sliding plate 56, and the sliding plate 56 is slidably connected with the tensioning support 54 through guide rail and sliding block assemblies 53 on the two sides of the sliding plate 56; a pressure sensor 57 is fixedly arranged on the sliding plate 56, one end of the pressure sensor 57 is fixedly connected with a spring 52, the other end of the spring 52 is fixedly connected with a tensioning wheel set 51, guide columns 58 are fixedly arranged on the two sides of the tensioning wheel set 51, and the tensioning wheel set 51 is slidably connected with the sliding plate 56 through the guide columns 58, and the tensioning wheel set 51 is guided and limited through the guide columns 58.

[0024] When the tensioning and adjusting integrated device 5 works, the electric cylinder 55 pushes the sliding plate 56 to translate, the sliding plate 56 pushes the tensioning wheel set 51 to translate through the spring 52, and the tensioning wheel set 51 contacts and pushes the steel wires 6 to form a certain tension, the tension of the steel wires 6 is adjusted by the electric cylinder 55 pushing the sliding plate 56 to compress or release the spring 52, the tension value is measured through the pressure sensor 57, and a control system is fed back, the control system adjusts the electric cylinder 55 according to the set tension and the measured tension, until the set tension value is reached, so that the steel wires 6 always maintain a reasonable tension in the production process; the control system is of the LE-30CTN / LE-30CTA type. The elastic force generated by the spring 52 being compressed to the limit is not more than the maximum value of the design tension of the steel wires 6, the spring 52 is arranged to elastically connect the sliding plate 56 and the tensioning wheel set 51, and rigid contact between the tensioning wheel set 51 and the steel wires 6 is avoided to prevent the steel wires 6 from being deformed or broken.

[0025] Embodiment 2 As shown in the drawing, Figures 8-10 The low-residual-torsion-value bead wire drawing production method comprises the following steps: S1, the steel wire 6 enters the rotating die device 1, and when passing through the drawing powder chamber 121, the drawing powder for lubrication is adhered to the surface of the steel wire 6; then, the steel wire 6 enters the rotating die 11, and the internal residual stress is effectively released through the extrusion deformation of the rotating die 11, the internal residual bias force of the steel wire 6 is eliminated, and the diameter deviation of the steel wire in the drawing process is reduced; the rotating die 11 can also avoid the rapid wear of the die due to continuous local stress, and prolong the service life of the die; The sizing zone height of the rotating die 11 is determined by the working zone angle 2β, the outlet angle 2γ and the target diameter of the steel wire Control is performed, and the specific steps are as follows: S11, the working zone of the rotating die 11 is ground into a taper shape by using a taper grinding needle with a taper angle of 2β, and the minimum diameter of the taper shape is , The calculation formula is:

[0026] Wherein, The target diameter of the steel wire 6 to be produced, β is half of the working zone angle, and is 10° according to experience; γ is half of the outlet angle, and is 30° according to experience; S12, the working zone of the rotating die 11 is secondarily ground by using a cylindrical grinding needle with a diameter of The sizing zone with a diameter of and a height of h is obtained. In this way, the height of the sizing zone is controlled, which can avoid the increase of the internal stress of the steel wire 6 due to the excessive height of the sizing zone, and prevent the rapid wear of the sizing zone due to the excessive shortness of the sizing zone; S2, after the steel wire 6 is drawn, it enters the heat treatment device 2 for heat treatment; during the heat treatment process, the steel wire 6 passes through the wire separating frame 22, and the steel wire 6 in the furnace is separated from each other by the wire separating frame 22, so as to avoid various adverse phenomena such as crossing and wire combination of the steel wire 6, make the internal organization of the steel wire 6 more stable after heat treatment, and thus reduce the residual stress of the steel wire 6 after heat treatment, which is beneficial to subsequent processing; S3, the steel wire 6 after heat treatment enters the straightening device 3, and the residual torsion of the steel wire 6 is controlled by the straightening device 3; according to the specification of the steel wire 6, the straightening wheel 321 with corresponding groove width and V-shaped groove angle is designed, and the residual torsion value of the steel wire 6 is further controlled; Each set of straightening wheel assembly 32 cooperates with each other to straighten the steel wire 6, two sets of work alternately, one set of straightening steel wire 6, the other set is in idle state, when the working straightening wheel assembly 32 reaches the service life, need to replace, idle straightening wheel assembly 32 cylinder 324 action, make corresponding straightening wheel 321 close to the steel wire 6; After the cylinder 324 of the working straightening wheel assembly 32 makes the corresponding straightening wheel 321 away from the steel wire 6, and then replace or repair; can be realized in the case of no production replacement or repair straightening wheel 321, avoid straightening wheel 321 continuous wear and tear affect the flatness of steel wire 6, at the same time, avoid affecting the normal production; S4, the straightened steel wire 6 enters the lead pot tempering device 4, in turn through the input drive wheel 41, temporary storage device 42, each set of guide wheel 43 and output drive wheel 45, the steel wire 6 is treated with 400 degrees or more tempering, eliminating its internal stress, so that its residual torsion remains stable; wherein the input drive wheel 41 continuously pulls the steel wire 6 at a constant speed, the output drive wheel 45 intermittently runs at a higher speed than the input drive wheel 41, and the lifting wheel 425 of the temporary storage device 42 reciprocates up and down.

[0027] In step S3, the groove width of the straightening wheel 321 is designed as follows: The V angle of the straightening wheel 321 is 90°, the groove width of the straightening wheel 321 is L, the diameter of the steel wire 6 is D, the angle between the line from the center of the steel wire 6 to the edge of the V groove of the straightening wheel 321 and the center plane of the straightening wheel 321 is α, according to the past production experience, the value range of α is 60°≤α≤80°, then: tanα=

[0028] Therefore, 1.732≤ ≤5.67, the calculation is: 1.72D≤L≤3.35D, that is, the value range of the groove width L, select any one V groove wheel in the range.

[0029] In step S4, when the output drive wheel 45 stops, the lifting wheel 425 of the temporary storage device 42 moves downward under the action of the lifting motor 421, so that the length of the steel wire 6 between the input drive wheel 41 and the lead pot 44 becomes longer, and the steel wire 6 is temporarily stored, at this time the steel wire 6 in the lead pot 44 is not moved; when the lifting wheel 425 moves to the lower detection position of the lifting support 422, the output drive wheel 45 acts to pull the steel wire 6 in the lead pot 44 forward, at the same time, the lifting motor 421 reverses to drive the lifting wheel 425 to move upward, so as to cooperate with the traction action of the output drive wheel 45, until the lifting wheel 425 moves to the upper detection position of the lifting support 422, at this time the steel wire 6 is in a flat state, the temporarily stored steel wire 6 is completely consumed, the output drive wheel 45 stops again, and enters the next cycle; the lower detection position and the upper detection position are both equipped with proximity switches.

[0030] This movement mode prolongs the residence time of the steel wire 6 in the lead pot 44, improves the efficiency of the tempering treatment, and is beneficial to eliminating the internal stress of the steel wire 6; at the same time, when the steel wire 6 in the lead pot 44 suddenly starts, it has a certain acceleration, can shake off the molten drawing powder attached to the surface of the steel wire 6, reduce the surface residue of the steel wire 6, and avoid the influence on the subsequent process.

Claims

1. A low residual torsion value bead wire drawing production apparatus characterized by, It sequentially comprises a rotary die device (1), a heat treatment device (2), a straightening device (3) and a lead pot tempering device (4) from front to back; the rear side of the lead pot tempering device (4) is further provided with a measuring and adjusting integrated device (5) for detecting and adjusting the tension of the steel wire; The rotary die device (1) comprises a die mounting seat (12) and a rotary die (11), and the rotary die (11) is rotationally connected with the die mounting seat (12); the die mounting seat (12) is provided with a wire drawing powder chamber (121) and a cooling chamber (122), and the rotary die (11) is located in the cooling chamber (122); The die mounting seat (12) is rotationally connected with a worm (16) at one end of which a die rotary motor (15) is drivingly connected; the rotary die (11) is sleeved with a worm wheel (17) which is in mesh with the worm (16); The straightening device (3) comprises at least eight sets of straightening wheel assemblies (32) which are arranged in two columns and multiple rows and are mirror installed on a straightening workbench (31); two straightening wheel assemblies (32) in each row form a pair, and each pair is spaced apart to form a group, and there are two groups in total; The lead pot tempering device (4) comprises a lead pot (44), and the input end of the lead pot (44) is provided with an input driving wheel (41) and a temporary storage device (42), and the temporary storage device (42) is located between the input driving wheel (41) and the lead pot (44).

2. The low residual torsion value bead wire draw production apparatus of claim 1, wherein, One side of the die mounting seat (12) is further fixed with a stirring motor (14) which is drivingly connected with a stirring rod (13) which is rotationally arranged on the die mounting seat (12) and penetrates through one side wall plate of the wire drawing powder chamber (121).

3. The low residual torsion value bead wire draw production apparatus of claim 1 wherein, The straightening wheel assembly (32) is provided with a straightening wheel (321) which can move forward and backward, and the straightening wheel assemblies (32) in each group cooperate with each other to straighten the steel wire (6), and the two groups work alternately; The straightening wheel assembly (32) comprises a gas cylinder (324) which is fixedly connected with the straightening workbench (31) through a gas cylinder mounting seat (323), the first end of a gas cylinder rod is fixedly provided with a movable support (322), and the top of the movable support (322) is rotationally provided with the straightening wheel (321); the movable support (322) is slidingly connected with the gas cylinder mounting seat (323) through guide rods at two sides.

4. The low residual torsion value bead wire draw production apparatus of claim 1 wherein, The heat treatment device (2) comprises a heat treatment open flame furnace (21) which is internally fixedly provided with a wire separating frame (22); the wire separating frame (22) comprises a fixed frame (221), and a plurality of wire separating plates (222) are arrayed above the fixed frame (221); a plurality of through holes for allowing the steel wire to pass through are formed in the wire separating plates (222), and the through holes at the corresponding positions of the wire separating plates (222) are coaxially arranged.

5. The low residual torsion value bead wire draw production apparatus of claim 1 wherein, The output end of the lead pot (44) is provided with an output driving wheel (45), and the input driving wheel (41) and the output driving wheel (45) are both driven to rotate by a motor, and the rotating speed of the output driving wheel (45) is higher than that of the input driving wheel (41); The lead pot (44) is fixed with multiple sets of guide wheels (43), and each set of guide wheels (43) is arranged alternately up and down; the temporary storage device (42) comprises a lifting support (422), a lifting wheel (425) is movably arranged on the lifting support (422), a lifting motor (421) is installed at the top of the lifting support (422), lead screws (423) are installed on the two sides of the lifting support (422), and a nut seat (424) is drivenly arranged on the lead screw (423); the lifting motor (421) is in transmission connection with the lead screws (423) on the two sides through a belt and pulleys.

6. A low residual torsion value bead wire drawing production method characterized by, The method comprises the following steps: S1, the steel wire (6) enters the rotating die device (1), and when passing through the drawing powder chamber (121), the drawing powder for lubrication is adhered to the surface of the steel wire (6); then the steel wire (6) enters the rotating die (11), the internal residual stress is effectively released through the extrusion deformation of the rotating die (11), the internal residual bias of the steel wire (6) is eliminated, and the diameter deviation of the steel wire in the drawing process is reduced; the rotating die (11) can also avoid the rapid wear of the die due to continuous local stress, thereby prolonging the service life of the die; The diameter control belt height of the rotating die (11) is controlled through the working area angle 2β, the outlet angle 2γ and the target diameter of the steel wire, and the specific steps are as follows: S11, using a taper angle of 2β taper grinding needle to rotate the mold (11) working area grinding into a taper, the taper minimum diameter is , The calculation formula is: wherein, D is the target diameter of the steel wire (6) to be produced, β is half of the working zone angle, which is empirically taken as 10°; γ is half of the exit angle, which is empirically taken as 30°; S12, using a cylindrical grinding needle with a diameter of , the working area of the rotary die (11) is ground for the second time, and a sizing belt with a diameter of and a height of h is obtained. S2, after the steel wire (6) is drawn, it enters the heat treatment device (2) for heat treatment; during the heat treatment process, the steel wire (6) passes through the wire separating frame (22), the steel wire (6) in the furnace is separated from each other through the wire separating frame (22), so as to avoid various adverse phenomena such as crossing and wire combination of the steel wire (6), make the internal organization of the steel wire (6) more stable after heat treatment, thereby reducing the residual stress of the steel wire after heat treatment, and being beneficial to subsequent processing; S3, the steel wire (6) after heat treatment enters the straightening device (3), and the residual torsion of the steel wire (6) is controlled by the straightening device (3); according to the specification of the steel wire (6), the corresponding groove width and V-shaped groove angle of the straightening wheel (321) are designed, and the residual torsion value of the steel wire (6) is further controlled; Each set of straightening wheel assembly (32) cooperates with each other to straighten the steel wire (6), and two sets work alternately, one set of straightening wheel assembly (32) is in idle state when the other set is straightening the steel wire (6); when the working straightening wheel assembly (32) needs to be replaced, the cylinder (324) of the idle straightening wheel assembly (32) moves to make the corresponding straightening wheel (321) close to the steel wire (6); then the cylinder (324) of the working straightening wheel assembly (32) moves to make the corresponding straightening wheel (321) away from the steel wire (6), and then the straightening wheel (321) is replaced or repaired; S4, the straightened steel wire (6) enters the lead pot tempering device (4), sequentially passes through the input drive wheel (41), the temporary storage device (42), each set of guide wheels (43) and the output drive wheel (45), and is subjected to a 400-degree or more tempering treatment to eliminate internal stress and keep the residual torsion of the steel wire (6) stable; wherein the input drive wheel (41) continuously pulls the steel wire (6) at a constant speed, the output drive wheel (45) intermittently operates at a higher speed than the input drive wheel (41), and the lifting wheel (425) of the temporary storage device (42) reciprocates up and down.

7. The low residual torsion value bead wire draw manufacturing method according to claim 6, characterized in that, In step S3, the groove width of the straightening wheel (321) is designed as follows: The V-shaped angle of the straightening wheel (321) is 90°, the groove width of the straightening wheel (321) is L, the diameter of the steel wire (6) is D, the angle between the line connecting the center of the steel wire (6) to the side edge of the V-shaped groove of the straightening wheel (321) and the center plane of the straightening wheel (321) is α, and according to previous production experience, the value range of α is 60°≤α≤80°, then: tanα= Therefore, 1.732≤ ≤5.67, it is calculated that: 1.72D≤L≤3.35D, that is, the range of the groove width L.

8. The low residual torsion value bead wire draw production method of claim 6, wherein, In step S4, when the output drive wheel (45) stops, the lifting wheel (425) of the temporary storage device (42) moves downward under the action of the lifting motor (421), so that the length of the steel wire (6) between the input drive wheel (41) and the lead pot (44) becomes longer, the steel wire (6) is temporarily stored, and the steel wire (6) in the lead pot (44) does not move at this time; when the lifting wheel (425) moves to the lower detection position of the lifting support (422), the output drive wheel (45) acts to pull the steel wire (6) in the lead pot (44) forward, and at the same time, the lifting motor (421) reverses to drive the lifting wheel (425) to move upward, so as to cooperate with the pulling action of the output drive wheel (45), until the lifting wheel (425) moves to the upper detection position of the lifting support (422), at this time, the steel wire (6) is in a straight state, the temporarily stored steel wire (6) is all consumed, the output drive wheel (45) stops again, and enters the next cycle.

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