Steel belt winding equipment and winding forming method thereof

Abstract

The invention discloses steel belt winding equipment and a winding forming method thereof. The steel belt winding equipment comprises a controller, an unwinding device, a correcting device, an annealing device, a pushing device, a machining device, a winding device and a discharging and conveying device, the machining device comprises a guide sleeve and a plurality of machining telescopic mechanisms, and the telescopic end of each machining telescopic mechanism is provided with a cutter mechanism, an upper clamping mechanism, a lower clamping mechanism and a pre-bending mechanism. According to the steel belt winding equipment and the winding forming method thereof, all the devices are controlled to work cooperatively through the controller, integration of all the working procedures is achieved, the production efficiency of spring steel is effectively improved, the consistency of products is ensured, and continuous assembly line work from the steel belt to the formed spring steel is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of manufacturing spiral springs, and particularly to a steel strip winding device and a winding forming method thereof. Background Art

[0002] A spiral spring, also known as a flat spiral spring, is usually formed and wound by stretching a steel strip under force. For some flat spiral springs with high-precision or high-performance requirements, a method of first winding forward and then winding backward can be adopted. First, the steel strip is wound forward a certain number of turns according to the design requirements. The steel strip after forward winding is the spring steel in a wound state. Then, the spring steel is wound backward the same or similar number of turns to form a flat spiral spring, which is beneficial to improving the torque and product consistency of the processed spring.

[0003] Existing steel strip winding devices usually drive the winding drum to rotate by a motor to drive the steel strip to bend and deform and wind forward along the circumferential direction of the winding drum, so as to wind the steel strip into spring steel. After that, usually, the single spring steel is cut and discharged manually or mechanically. After the spring steel in the wound state is discharged, because it loses the limit of the forming device, the spring steel in the wound state is likely to spread due to the impact of falling materials and requires manual sorting. During the spreading process of the spring steel, position movement and deformation may occur. When winding again, problems such as deviation in the outer diameter or inner diameter of the spring, uneven winding, and skewing may occur. This results in relatively low production efficiency of the spring steel, poor product consistency, and affects the quality of the subsequent winding and forming of the spring steel into a spiral spring. Summary of the Invention

[0004] The purpose of the present invention is to design a steel strip winding device and a winding forming method thereof to solve the above-mentioned technical deficiencies. By controlling each device to work together through a controller, the integration of each process is realized, thereby effectively improving the production efficiency of the spring steel, ensuring the product consistency, and realizing the continuous flow operation from the steel strip to the formed spring steel.

[0005] To solve the above technical problems, the technical solution of the present invention is: a steel strip winding device, including a controller, and a unwinding device, a pre-forming device, an annealing device, a pushing device, a processing device, a winding device, and a discharging and transporting device that are controlled by the controller and arranged in sequence along the conveying path; The unwinding device includes a storage rack and an unwinding reel, and the unwinding reel is located on the conveying path and winds a steel strip; The preforming device includes a material guiding mounting frame, at least one material guiding roller, a forming roller, a material guiding movable frame, and a screw rod translation mechanism. The forming roller is arranged on the material guiding mounting frame, the material guiding roller is arranged on the material guiding movable frame. The material guiding roller and the forming roller are arranged at an upper and lower interval. The steel strip is attached to the material guiding roller and bypasses the forming roller along the circumferential direction of the material guiding roller. When the steel strip is located between the material guiding roller and the forming roller, the steel strip is attached to the forming roller and is bent along the circumferential direction of the forming roller and then conveyed to the annealing device. The material guiding movable frame is slidably connected to the material guiding mounting frame, and the translation end of the screw rod translation mechanism is connected to the material guiding movable frame; The annealing device is provided with an annealing channel which is located on the conveying path and through which the steel strip passes; The pushing device is used to push the steel strip from the annealing device to the processing device; The processing device includes a guiding sleeve through which the steel strip passes, and a plurality of processing telescopic mechanisms arranged around the guiding sleeve. The telescopic ends of the processing telescopic mechanisms are respectively provided with at least a pre-bending mechanism and a cutting knife mechanism. The bending end of the pre-bending mechanism is used to bend the steel strip into an inner end, and the cutting knife end of the cutting knife mechanism is used to cut the steel strip; The winding device includes a winding column, a winding rotation mechanism, a cross slide table mechanism, and a winding frame. The winding column is arranged on the rotation end of the winding rotation mechanism. The winding rotation mechanism is arranged on the moving end of the cross slide table mechanism. The winding frame is located on the conveying path and is provided with a material discharging hole through which the winding column is inserted. A clamping groove for the inner end to be clamped is formed on the end face of the winding column; Baffle plates are arranged on both sides of the discharging transportation device, and the winding frame is located above the two baffle plates.

[0006] Preferably, the diameter length of the material guiding roller is greater than that of the forming roller.

[0007] Preferably, two material guiding rollers are provided. The two material guiding rollers are arranged in a staggered and spaced manner at the upper part of the material guiding mounting frame. The diameter length of the material guiding roller at the upper position is greater than that of the material guiding roller at the lower position.

[0008] Preferably, the distance between the forming roller and the material guiding roller at the lower position is less than the distance between the two material guiding rollers.

[0009] Preferably, a correcting device is arranged between the unwinding device and the preforming device. The correcting device includes a correcting frame, at least one horizontal correcting mechanism and a fixed-length mechanism arranged on the correcting frame. Both the horizontal correcting mechanism and the fixed-length mechanism are located on the conveying path; The horizontal correction mechanism includes a correction mounting frame, a correction lifting mechanism, a first horizontal wheel set, and a second horizontal wheel set. The first horizontal wheel set is positioned on the correction mounting frame. The second horizontal wheel set is slidably connected to the correction mounting frame and moves up and down along the height direction of the correction mounting frame. The lifting end of the correction lifting mechanism is connected to the second horizontal wheel set; The fixed-length mechanism is used to measure the length of the steel strip unwound by the unwinding reel when the steel strip is unwound from the unwinding reel.

[0010] Preferably, the pushing device includes a pushing frame, a supporting wheel set, a pressing wheel set, a pushing lifting mechanism, and a pushing rotating mechanism arranged on the pushing frame. The lifting end of the pushing lifting mechanism is connected to the pressing wheel set. At least one of the supporting wheel set and / or at least one of the pressing wheel set is connected to the rotating end of the pushing rotating mechanism.

[0011] Preferably, the annealing device includes an annealing frame, an inlet strip channel, a spiral electric heating wire, and an outlet strip channel arranged on the annealing frame in sequence along the conveying path. An annealing channel is formed by the cooperation of the inside of the inlet strip channel, the middle area inside the electric heating wire, and the inside of the outlet strip channel.

[0012] Preferably, the pre-bending mechanism includes a bending mounting frame, a bending rotating mechanism, and a bending head. The bending mounting frame is fixedly connected to the telescopic end of the horizontally arranged processing telescopic mechanism. The bending rotating mechanism is fixedly connected to the bending mounting frame. The bending head is fixedly connected to the rotating end of the bending rotating mechanism. A supporting gap and an end bending gap are formed on the bending head. One end of the steel strip extending out of the guiding sleeve passes through the supporting gap and is bent by the pressure of the bending head and cooperates with the end bending gap to be bent into the inner side end in a U shape.

[0013] Preferably, the cutting knife mechanism includes a cutting knife mounting frame and a punching cutting knife. The cutting knife mounting frame is fixedly connected to the telescopic end of the corresponding processing telescopic mechanism. The punching cutting knife is fixedly connected to one side of the cutting knife mounting frame close to the guiding sleeve.

[0014] A winding forming method for a steel strip winding device includes the following steps: S1, Preparation work: Set the operating parameters through the controller, place the wound steel strip on the unwinding reel, and one end of the steel strip passes through the pre-forming device, annealing device, pushing device, processing device, and winding device in sequence along the conveying path; S2. Elastic Bending Mode and Plastic Bending Mode Switching: The lead screw translation mechanism drives the material guiding movable frame to translate, so that the material guiding roller translates relative to the forming roller, thereby adjusting the bending degree of the steel strip when it winds around the forming roller, and thus switching the pre-forming device to the elastic bending mode or the plastic bending mode; When the steel strip winds around the forming roller, the included angle between both sides of the steel strip is the bending angle. The larger this bending angle is, the smaller the bending degree of the steel strip when it winds around the forming roller; the smaller this bending angle is, the larger the bending degree of the steel strip when it winds around the forming roller. According to the situation of the steel strip itself, adjust this bending angle so that the steel strip undergoes elastic bending or plastic bending when passing through the forming roller; S3. Inner End Processing: When the pre-forming device is switched to the elastic bending mode, the steel strip undergoes elastic deformation and then recovers when passing through the pre-forming device in the elastic bending mode. After the steel strip is located on the pushing device, the pre-forming device is switched to the plastic bending mode. At the same time, the pushing device pushes the steel strip from the annealing device to the processing device, and the processing device bends the steel strip into the inner end through the pre-bending mechanism; S4. Preparation for Traction of the Steel Strip: The pre-bending mechanism retracts and returns to its original position to disengage from the inner end. The winding device adjusts the positions of the winding rotating mechanism and the winding column in the horizontal and vertical directions through the cross slide mechanism. After the winding column passes through the material discharging hole, the inner end is inserted into the clamping groove; S5. Steel Strip Winding Process: The rotating end of the winding rotating mechanism drives the winding column to rotate to wind the steel strip. The winding device, as the power source, traction the steel strip to be conveyed along the conveying path. When the steel strip passes through the pre-forming device in the plastic bending mode, it undergoes plastic deformation. While the steel strip is bent into an arc shape in the length direction, the steel strip also undergoes plastic deformation in the width direction, and due to the relative stability of the material properties of the steel strip, this deformation shows uniformity, so that the steel strip forms a uniform arc shape in the width direction; S6. Annealing Treatment: The steel strip with elastic deformation or plastic deformation passes through the annealing channel, and the annealing device pre-heats the part of the steel strip passing through the annealing channel to eliminate the residual stress on the steel strip; S7. Spring Steel Cutting: After the steel strip wound on the winding column is wound into a coiled spring steel, the winding device stops, and the cutting tool mechanism approaches the steel strip through the corresponding processing telescopic mechanism and its cutting tool end cuts the steel strip; S8. Spring Steel Discharging: After the spring steel is cut, the winding device adjusts the position of the winding column in the vertical direction through the cross slide mechanism, so that the winding column withdraws from the material discharging hole from the conveying path. The spring steel disengages from the winding column and falls onto the working surface of the discharging transport device in the space between the two baffle plates, and the spring steel is discharged along the working surface of the discharging transport device; S9. Circular Winding and Forming: Repeat S2 to S8 to perform the circular work of winding the steel strip into spring steel.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. A steel strip winding device of the present invention controls various devices to work in coordination through a controller to realize the integration of various processes such as switching between elastic bending mode and plastic bending mode, inner end processing, traction steel strip preparation, traction steel strip transportation, steel strip winding treatment, annealing treatment, spring steel cutting, and spring steel discharging. The manufacturing equipment effectively improves the production efficiency of spring steel by cycling the above steps, ensures the consistency of the product, and realizes continuous assembly line operation from steel strip to formed spring steel.

[0016] 2. While the steel strip is driven to be wound onto its upper surface by the winding device to form spring steel, the winding device serves as a power source to pull the steel strip along the conveying path. When the steel strip passes through the preforming device under the traction of the winding device, the steel strip first passes through a larger diameter guide roller for elastic deformation, so that the steel strip adapts to a certain degree of bending deformation to initially adapt to the bending state, in preparation for subsequent plastic deformation. After that, the steel strip bypasses a smaller diameter forming roller for plastic deformation. The larger diameter guide roller and the smaller diameter forming roller exert different effects on the steel strip in the elastic deformation and plastic deformation stages, respectively, which helps to optimize the stress distribution inside the steel strip, making the stress in the spring steel more uniform, reducing stress concentration, making the steel strip easier to be curled into spring steel during winding, and the spring steel after winding can maintain good stability, avoiding rebound or loosening of the spring steel after winding.

[0017] 3. The preforming device of the present invention adjusts the distance between the guide roller and the forming roller more accurately through the screw translation mechanism, so as to adjust the bending degree of the steel strip when it wraps around the forming roller according to the condition of the steel strip itself, so that the steel strip undergoes elastic bending or plastic bending when passing through the forming roller. It is more flexible to use and has better applicability.

[0018] 4. Under the traction force of the winding device, the two side parts of the steel strip in the width direction tend to bend upward during the plastic deformation process to adapt to the overall deformation trend of the steel strip, that is, the steel strip adjusts its internal stress to adapt to the bending deformation toward the middle in the width direction, and the cross-section of the steel strip in the width direction is stretched into an arc shape, which can make the steel strip more naturally form the required spiral or vortex structure during the winding process, reduce the resistance and rebound of the steel strip 17 during the winding process, and make the steel strip winding into spring steel smoother.

[0019] 5. The steel strip of the spring steel manufactured by the manufacturing equipment is arc-shaped in the width direction. Through the arc-shaped structure of the steel strip in the width direction, two adjacent steel strips are in conflict with each other and limit each other, so that the sliding resistance between the two adjacent layers of the spring steel strip is increased, and the relative sliding between the two adjacent layers of the spring steel strip can be effectively prevented, making the spring steel more stable, and avoiding the looseness or chaotic winding of the spring steel due to blanking collision, thereby significantly improving the production efficiency and product consistency, and ensuring the subsequent winding and forming quality of the spring steel. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural view of the manufacturing equipment in the embodiment.

[0021] Figure 2 is a schematic structural view of the correction device and the preforming device in the embodiment.

[0022] Figure 3 is a cross-sectional view of the correction device and the preforming device.

[0023] Figure 4 is a cross-sectional view of the annealing device in the embodiment.

[0024] Figure 5 is a schematic structural view of the annealing channel in the embodiment.

[0025] Figure 6 is a schematic structural view of the pushing device in the embodiment.

[0026] Figure 7 is a cross-sectional view of the pushing device in the embodiment.

[0027] Figure 8 is a schematic structural view of the processing device in the embodiment.

[0028] Figure 9 is a schematic structural view of the elbow bend in the embodiment Figure 1 .

[0029] Figure 10 is a schematic structural view of the elbow bend in the embodiment Figure 2 .

[0030] Figure 11 is a schematic structural view of the winding device and the discharging and transporting device in the embodiment.

[0031] Figure 12 is a cross-sectional view of the winding device and the discharging and transporting device in the embodiment.

[0032] Figure 13 is a schematic structural view of the limiting space in the embodiment.

[0033] Figure 14 is a schematic structural view of the spring steel manufactured by the manufacturing equipment in the embodiment.

[0034] Figure 15 is a cross-sectional view of the spring steel manufactured by the manufacturing equipment in the embodiment.

[0035] Figure 16 is a schematic structural view when the preforming device switches to the plastic bending mode in the embodiment.

[0036] Figure 17It is a schematic structural diagram when the preforming device in the embodiment switches to the elastic bending mode.

[0037] In the figure: 1. Controller; 2. Unwinding device; 21. Storage rack; 22. Unwinding reel; 3. Straightening device; 31. Straightening rack; 32. Horizontal straightening mechanism; 321. Straightening mounting frame; 322. Straightening lifting mechanism; 323. First horizontal wheel set; 324. Second horizontal wheel set; 33. Fixed-length mechanism; 4. Annealing device; 401. Annealing channel; 402. Guiding curved surface; 41. Annealing rack; 42. Inlet tape path; 43. Electric heating wire; 44. Outlet tape path; 5. Pushing device; 51. Pushing rack; 52. Support wheel set; 53. Pressing wheel set; 54. Pushing lifting mechanism; 55. Pushing rotating mechanism; 6. Processing device; 61. Guide sleeve; 62. Processing telescopic mechanism; 7. Winding device; 71. Winding column; 7101. Clamping groove; 72. Winding rotating mechanism; 73. Cross slide mechanism; 74. Winding rack; 7401. Unloading hole; 741. Mounting bracket; 742. First support plate; 743. Second support plate; 8. Discharge conveying device; 801. Baffle plate; 9. Cutting tool mechanism; 91. Cutting tool mounting frame; 92. Punching cutter; 10. Upper clamping mechanism; 11. Lower clamping mechanism; 12. Clamping mounting frame; 13. Clamping roller; 14. Limiting space; 15. Pre-bending mechanism; 1501. Support gap; 1502. End bending gap; 151. Bending mounting frame; 152. Bending rotating mechanism; 153. Bending head; 16. Preforming device; 161. Guide material mounting frame; 162. Guide roller; 163. Forming roller; 164. Guide material movable frame; 165. Screw rod translation mechanism; 1601. Stroke rod; 1602. Stroke sleeve; 17. Steel strip; 18. Spring steel; 1801. Inner end. Detailed implementation manners

[0038] The present invention will be further described below through embodiments in conjunction with the accompanying drawings.

[0039] Refer to Figure 1 , a steel strip 17 winding device, including a controller 1, and an unwinding device 2, a straightening device 3, a preforming device 16, an annealing device 4, a pushing device 5, a processing device 6, a winding device 7 and a discharge conveying device 8 which are controlled by the controller 1 and arranged in sequence along the conveying path.

[0040] The unwinding device 2 includes a storage rack 21 and an unwinding reel 22 rotatably connected to the storage rack 21. The controller 1 is arranged on the storage rack 21, and the unwinding reel 22 is located on the conveying path and winds the steel strip 17.

[0041] Refer to Figure 2 , Figure 3, the correction device 3 includes a correction frame 31, two horizontal correction mechanisms 32 and a fixed-length mechanism 33 arranged on the correction frame 31. The fixed-length mechanism 33 is located between two adjacent horizontal correction mechanisms 32, and both the fixed-length mechanism 33 and each horizontal correction mechanism 32 are located on the conveying path.

[0042] The horizontal correction mechanism 32 includes a correction mounting frame 321, a correction lifting mechanism 322, a first horizontal wheel set 323 and a second horizontal wheel set 324. The first horizontal wheel set 323 is positioned on the correction mounting frame 321, and the second horizontal wheel set 324 is slidably connected to the correction mounting frame 321 and moves up and down along the height direction of the correction mounting frame 321. The correction lifting mechanism 322 is a telescopic cylinder, and the lifting end of the correction lifting mechanism 322 is connected to the second horizontal wheel set 324.

[0043] The fixed-length mechanism 33 is located on the conveying path to measure the length of the steel strip 17 unwound from the unwinding reel 22 when the unwinding reel 22 unwinds the steel strip 17. The fixed-length mechanism 33 is provided with a lower support wheel and an upper movable wheel. The upper movable wheel can press down through a wrench or mechanical drive to clamp the steel strip 17 between the two wheels. When the steel strip 17 moves along the conveying path, the wheels will rotate accordingly. By measuring the number of rotations and the circumference of the wheels, the length of the coil movement can be accurately calculated, thus realizing fixed-length measurement. The fixed-length mechanism 33 is a prior art and will not be elaborated in detail here.

[0044] Reference Figure 3 、 Figure 16 、 Figure 17 , the preforming device 16 includes a material guiding mounting frame 161, two material guiding rollers 162, a forming roller 163, a material guiding movable frame 164 and a screw rod translation mechanism 165. The two material guiding rollers 162 are arranged on the material guiding movable frame 164 at an upper and lower interval. The forming roller 163 is arranged on the material guiding mounting frame 161. The material guiding roller 162 at the lower position and the forming roller 163 are arranged at an upper and lower interval. The diameter length of the material guiding roller 162 at the upper position is greater than that of the material guiding roller 162 at the lower position, and the diameter length of the forming roller 163 is less than that of the material guiding roller 162 at the lower position. The material guiding mounting frame 161 is provided with a stroke rod 1601, and the material guiding movable frame 164 is provided with a stroke sleeve 1602 slidably connected to the stroke rod 1601. The material guiding movable frame 164 is slidably connected to the material guiding mounting frame 161. The translation end of the screw rod translation mechanism 165 is connected to the material guiding movable frame 164. The screw rod translation mechanism 165 is an electric push rod, which is driven by a motor and uses screw rod transmission to convert the rotational motion of the motor into the linear reciprocating motion of the push rod. It is a prior art and will not be elaborated in detail here.

[0045] The lower surface of the steel strip 17 is attached to the material guiding roller 162 and bypasses the forming roller 163 along the circumferential direction of the material guiding roller 162. The steel strip 17 is located between the material guiding roller 162 and the forming roller 163. The upper surface of the steel strip 17 is attached to the forming roller 163 and is bent along the circumferential direction of the forming roller 163 and then conveyed to the annealing device 4. The pre-forming device 16 adjusts the distance between the material guiding roller 162 and the forming roller 163 more precisely through the lead screw translation mechanism 165, so as to adjust the bending degree of the steel strip 17 when it bypasses the forming roller 163 according to the situation of the steel strip 17 itself, so that the steel strip 17 undergoes elastic bending or plastic bending when passing through the forming roller 163. The pre-forming device 16 switches to the elastic bending mode or the plastic bending mode, which is more flexible to use and has better applicability.

[0046] The angle between the two sides of the steel strip 17 when the steel strip 17 bypasses the forming roller 163 is the bending angle. The larger this bending angle is, the smaller the bending degree of the steel strip 17 when it bypasses the forming roller 163; the smaller this bending angle is, the larger the bending degree of the steel strip 17 when it bypasses the forming roller 163. According to the situation of the steel strip 17 itself, adjust this bending angle so that the steel strip 17 undergoes elastic bending or plastic bending when passing through the forming roller 163. When the pre-forming device 16 switches to the plastic bending mode, the steel strip 17 is conveyed along an R-shaped path through two material guiding rollers 162 and the forming roller 163 in sequence. When the pre-forming device 16 switches to the elastic bending mode, the steel strip 17 is conveyed along a Z-shaped path through the material guiding roller 162 and the forming roller 163 located at the upper position in sequence.

[0047] Reference Figure 4 、 Figure 5 The annealing device 4 includes an annealing rack 41, and an inlet strip channel 42, a spiral electric heating wire 43 and an outlet strip channel 44 that are sequentially arranged on the annealing rack 41 along the conveying path. An annealing channel 401 is formed by the cooperation of the inside of the inlet strip channel 42, the middle area inside the electric heating wire 43, and the inside of the outlet strip channel 44. The annealing channel 401 is located on the conveying path and allows the steel strip 17 to pass through. Preferably, a guiding curved surface 402 adapted to the steel strip 17 is formed between the opening inner walls of the inlet strip channel 42 and the outlet strip channel 44, and the guiding curved surface 402 guides the steel strip 17 to smoothly enter the annealing channel 401.

[0048] Reference Figure 6 、 Figure 7, the pushing device 5 includes a pushing frame 51, a supporting wheel set 52, a pressing wheel set 53, a pushing lifting mechanism 54 and a pushing rotating mechanism 55 arranged on the pushing frame 51. The pushing lifting mechanism 54 is a telescopic cylinder. There are two pushing lifting mechanisms 54, and the two pushing lifting mechanisms 54 are symmetrically arranged at the top of the pushing frame 51. The lifting end of the pushing lifting mechanism 54 is connected to the pressing wheel set 53. The supporting wheel set 52 is composed of three rotatable supporting wheels, and the pressing wheel set 53 is composed of three rotatable pressing wheels. The pushing rotating mechanism 55 is a rotating motor. The pushing rotating mechanism 55 is slidably connected to the back side of the pushing frame 51. One blanking wheel at the middle position of the pressing wheel set 53 is connected to the rotating end of the pushing rotating mechanism 55.

[0049] Reference Figure 8 , Figure 9 , Figure 10 , Figure 13 , the processing device 6 includes a guide sleeve 61 and a number of processing telescopic mechanisms 62 arranged around the guide sleeve 61. The guide sleeve 61 is arranged on the pushing frame 51 and located on the conveying path. The hollow area of the guide sleeve 61 is adapted to the steel strip 17. The straight steel strip 17 or the plastically bent steel strip 17 passes through the guide sleeve 61. The processing telescopic mechanism 62 is a telescopic cylinder or an electric cylinder or a thruster. The telescopic ends of the respective processing telescopic mechanisms 62 are at least respectively provided with a cutting knife mechanism 9, an upper clamping mechanism 10, a lower clamping mechanism 11 and a pre-bending mechanism 15. The upper clamping mechanism 10 and the lower clamping mechanism 11 are arranged oppositely, and the pre-bending mechanism 15 is arranged horizontally. Preferably, the number of the processing telescopic mechanisms 62 can be any number such as six, eight, etc., so that the staff can install different functional mechanisms such as visual inspection, punching mechanism, stamping mechanism, etc. according to requirements.

[0050] The cutting knife mechanism 9 includes a cutting knife mounting frame 91 and a punching cutting knife 92. The cutting knife mounting frame 91 is fixedly connected to the telescopic end of the corresponding processing telescopic mechanism 62, and the punching cutting knife 92 is fixedly connected to the side of the cutting knife mounting frame 91 close to the guide sleeve 61.

[0051] Both the upper clamping mechanism 10 and the lower clamping mechanism 11 include a clamping mounting frame 12 and a clamping roller 13. The clamping mounting frame 12 is fixedly connected to the telescopic end of the corresponding processing telescopic mechanism 62. The clamping roller 13 is arranged horizontally and rotatably connected to the side of the clamping mounting frame 12 close to the guide sleeve 61. The clamping roller 13 of the upper clamping mechanism 10 and the clamping roller 13 of the lower clamping mechanism 11 approach each other to form a limiting space 14 for clamping and limiting the steel strip 17, preventing the steel strip 17 from moving or shaking during the cutting process.

[0052] The pre-bending mechanism 15 includes a bending mounting frame 151, a bending rotation mechanism 152, and a bending head 153. The bending mounting frame 151 is fixedly connected to the telescopic end of the horizontally arranged processing telescopic mechanism 62. The bending rotation mechanism 152 is a rotating motor and is fixedly connected to the bending mounting frame 151. The bending head 153 is the bending end of the pre-bending mechanism 15 and is fixedly connected to the rotating end of the bending rotation mechanism 152. The bending head 153 has a linear support gap 1501 and an end bending gap 1502. One end of the steel strip 17 extending out of the guide sleeve 61 passes through the support gap 1501 along the conveying path and is pressed and bent by the bending head 153, and is bent into the inner side end 1801 of a U shape in cooperation with the end bending gap 1502.

[0053] Reference Figure 11 、 Figure 12 The winding device 7 includes a winding column 71, a winding rotation mechanism 72, a cross slide mechanism 73, and a winding frame 74. The winding rotation mechanism 72 is a rotating motor. The winding column 71 is arranged on the rotating end of the winding rotation mechanism 72. The winding rotation mechanism 72 is arranged opposite to the pre-bending mechanism 15. The winding rotation mechanism 72 is arranged on the moving end of the cross slide mechanism 73. The cross slide mechanism 73 refers to a combined slide formed by combining two linear slides in the X-axis direction and the Y-axis direction, and is usually also called a coordinate axis slide or an XY-axis slide, which is a prior art and will not be described in detail here. The winding frame 74 is located on the conveying path and is provided with a blanking hole 7401 through which the winding column 71 is inserted. The end of the winding column 71 passing through the blanking hole 7401 is located on the conveying path. The end face of the winding column 71 is provided with a clamping groove 7101, and the clamping groove 7101 is adapted to the winding frame 74.

[0054] The winding frame 74 includes a mounting bracket 741, and a first support plate 742 and a second support plate 743 that are parallel to each other and arranged at intervals on the mounting bracket 741. The blanking hole 7401 penetrates through the side wall of the first support plate 742. The mounting bracket 741 is fixedly connected to the discharging and transporting device 8. The gap between the first support plate 742 and the second support plate 743 is a winding gap, and the winding gap is adapted to the spring steel 18.

[0055] The discharging and transporting device 8 is a conveyor belt device, which is a prior art and will not be described in detail here. The working surface of the discharging and transporting device 8 is inclined downward. Baffle plates 801 are arranged on both sides of the discharging and transporting device 8. The winding frame 74 is located above the two baffle plates 801. Preferably, the opposite sides of the first support plate 742 and the second support plate 743 are respectively adapted to the opposite sides of the two baffle plates 801.

[0056] Reference Figures 1 to 15 The working process and working principle of this manufacturing equipment are as follows: S1, Preparation: Set the operating parameters through the controller 1, place the coiled steel strip 17 on the unwinding reel 22, and one end of the steel strip 17 passes through the preforming device 16, annealing device 4, pushing device 5, processing device 6, and winding device 7 along the conveying path in sequence; S2, Elastic Bending Mode and Plastic Bending Mode Switching: The lead screw translation mechanism 165 drives the material guiding movable frame 164 to translate, so that the material guiding roller 162 translates relative to the forming roller 163, thereby adjusting the bending degree of the steel strip 17 when it winds around the forming roller 163, and thus switching the preforming device 16 to the elastic bending mode or the plastic bending mode; The included angle between the two sides of the steel strip 17 when it winds around the forming roller 163 is the bending angle. The larger this bending angle is, the smaller the bending degree of the steel strip 17 when it winds around the forming roller 163; the smaller this bending angle is, the larger the bending degree of the steel strip 17 when it winds around the forming roller 163. According to the situation of the steel strip 17 itself, adjust this bending angle so that the steel strip 17 undergoes elastic bending or plastic bending when passing through the forming roller 163; S3, Inner End Processing: When the preforming device 16 is switched to the elastic bending mode, the steel strip 17 undergoes elastic deformation and then recovers when passing through the preforming device 16 in the elastic bending mode. After the steel strip 17 is located on the pushing device 5, the preforming device 16 is switched to the plastic bending mode. At the same time, the pushing device 5 pushes the steel strip 17 from the annealing device 4 to the processing device 6, and the processing device 6 bends the steel strip 17 into the inner end 1801 through the pre-bending mechanism 15; S4, Preparation for Traction of the Steel Strip: The pre-bending mechanism 15 retracts and returns to disengage from the inner end 1801. The winding device 7 adjusts the positions of the winding rotation mechanism 72 and the winding column 71 in the horizontal and vertical directions through the cross slide mechanism 73. The winding column 71 passes through the material discharging hole 7401 so that the inner end 1801 is inserted into the clamping groove 7101; S5, Steel Strip Winding Process: The rotating end of the winding rotation mechanism 72 drives the winding column 71 to rotate to wind the steel strip 17. The winding device 7 serves as a power source to traction the steel strip 17 to be conveyed along the conveying path. When the steel strip 17 passes through the preforming device 16 in the plastic bending mode, it undergoes plastic deformation. While the steel strip 17 is bent into an arc shape in the length direction, the steel strip 17 also undergoes plastic deformation in the width direction. And due to the relative stability of the material properties of the steel strip 17, this deformation shows uniformity, so that the steel strip 17 forms a uniform arc shape in the width direction; S6, Annealing Treatment: The elastically deformed or plastically deformed steel strip 17 passes through the annealing channel 401, and the annealing device 4 performs preheating treatment on the part of the steel strip 17 passing through the annealing channel 401 to eliminate the residual stress on the steel strip 17; S7. Spring steel cutting: After the steel strip 17 on the winding column 71 is wound into the coiled spring steel 18, the winding device 7 stops. The cutter mechanism 9 approaches the steel strip 17 through the corresponding processing telescopic mechanism 62 and its cutter end cuts the steel strip 17. S8. Spring steel discharging: After the spring steel 18 is cut, the winding device 7 adjusts the position of the winding column 71 longitudinally through the cross slide mechanism 73, so that the winding column 71 withdraws from the material discharging hole 7401 from the conveying path. The spring steel 18 detaches from the winding column 71 and falls to the working surface of the discharging conveying device 8 in the space between the two baffle plates 801, and the spring steel 18 discharges along the working surface of the discharging conveying device 8. S9. Circular winding and forming: Repeat S2 to S8 to perform the circular work of winding the steel strip 17 into the spring steel 18.

[0057] The manufacturing equipment controls the coordinated work of each device through the controller 1 to realize the integration of various processes such as the switching between the elastic bending mode and the plastic bending mode, the inner end processing, the preparation of the traction steel strip, the traction steel strip conveying, the steel strip winding treatment, the annealing treatment, the spring steel cutting, and the spring steel discharging. By circulating the above steps, the manufacturing equipment effectively improves the production efficiency of the spring steel 18, ensures the consistency of the product, and realizes the continuous assembly line operation from the steel strip 17 to the formed spring steel 18.

[0058] During the process that the processing device 6 drives the steel strip 17 to wind around its upper surface into the spring steel 18 through the winding device 7, the winding device 7 serves as a power source to traction the steel strip 17 to convey along the conveying path. When the steel strip 17 passes through the preforming device 16 under the traction of the winding device 7, the steel strip 17 first passes through the guide roller 162 with a larger diameter and length to perform elastic deformation, so that the steel strip 17 adapts to a certain degree of bending deformation to initially adapt to the bending state and prepare for the subsequent plastic deformation. After that, the steel strip 17 bypasses the forming roller 163 with a smaller diameter and length to perform plastic deformation. The guide roller 162 with a larger diameter and length and the forming roller 163 with a smaller diameter and length exert different effects on the steel strip 17 in the elastic deformation and plastic deformation stages respectively, which helps to optimize the stress distribution inside the steel strip 17, makes the stress in the spring steel 18 more uniform, reduces the stress concentration phenomenon, makes the steel strip 17 easier to be coiled into the spring steel 18 during winding, and enables the coiled spring steel 18 to maintain good stability after winding, avoiding the situation of springback or loosening of the spring steel 18 after winding.

[0059] Under the action of the traction force of the winding device 7, during the plastic deformation process of the steel strip 17, the two side portions of the steel strip 17 in the width direction tend to bend upward to adapt to the overall deformation trend of the steel strip 17, that is, the steel strip 17 makes the steel strip 17 adapt to the bending deformation toward the middle in the width direction through the internal stress adjustment, and makes the cross-section of the steel strip 17 in the width direction stretch into an arc shape, which can make the steel strip 17 form the required spiral or scroll structure more naturally during the winding process, reduce the resistance and rebound of the steel strip 17 during the winding process, and make the winding of the steel strip 17 into the spring steel 18 more smooth.

[0060] The steel strip 17 of the spring steel 18 manufactured by this manufacturing equipment is arc-shaped in the width direction. Through the arc-shaped structure of the steel strip 17 in the width direction, two adjacent steel strips 17 are in contact with each other and limit each other, so that the slip resistance between two adjacent steel strips 17 of the spring steel 18 is increased, which can effectively prevent the relative sliding between two adjacent steel strips 17 of the spring steel 18, make the spring steel 18 more stable, and avoid the situation of loosening or winding chaos of the spring steel 18 due to blanking collision. Thus, the production efficiency and product consistency of the spring steel 18 are significantly improved, the subsequent winding and forming quality of the spring steel 18 is ensured. For the spring steel 18 with the steel strips 17 of each layer being arc-shaped in the width direction, its stress distribution is more uniform. This design makes the stress and strain borne by each part more balanced during the process of winding and forming it into a coil spring, thereby reducing the phenomenon of local stress concentration. The arcs of the steel strips 17 of each layer on the spring steel 18 can naturally fit the inner diameter of the coil spring, forming a more compact and regular spiral structure, which helps to improve the overall strength and durability of the coil spring, enables the coil spring to better maintain its shape and size during work, reduces the risk of deformation and damage, and makes the coil spring wound and formed from the spring steel 18 have better torque and product consistency.

[0061] Of course, the above are only typical examples of the present invention. In addition, the present invention can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A steel strip winding device, characterized in that: It comprises a controller (1), and an unwinding device (2), a preforming device (16), an annealing device (4), a pushing device (5), a processing device (6), a winding device (7) and a discharging transport device (8) which are controlled by the controller (1) and arranged in sequence along a conveying path; The unwinding device (2) comprises a material storage rack (21) and an unwinding disk (22), wherein the unwinding disk (22) is located on the conveying path and has a steel strip (17) wound thereon; The preforming device (16) comprises a material guide mounting frame (161), at least one material guide roller (162), a forming roller (163), a material guide movable frame (164) and a screw rod translation mechanism (165), wherein the forming roller (163) is arranged on the material guide mounting frame (161), the material guide roller (162) is arranged on the material guide movable frame (164), the material guide roller (162) and the forming roller (163) are arranged vertically and spaced apart, and the steel belt (17) is attached to the material guide roller (162) and is moved along the material guide roller (163). The guide roller (162) bypasses the forming roller (163) in a circumferential direction, the steel belt (17) is located between the guide roller (162) and the forming roller (163), the steel belt (17) is attached to the forming roller (163) and is conveyed to the annealing device (4) after being bent along the circumferential direction of the forming roller (163), the guide movable frame (164) is slidably connected to the guide mounting frame (161), and the translation end of the screw rod translation mechanism (165) is connected to the guide movable frame (164); The annealing device (4) is provided with an annealing channel (401), the annealing channel (401) is located on the conveying path and is used for the steel strip (17) to pass through; The pushing device (5) is used to push the steel strip (17) from the annealing device (4) to the processing device (6).

2. The steel strip winding device according to claim 1, characterized in that: The diameter of the guide roller (162) is greater than the diameter of the forming roller (163).

3. The steel strip winding device according to claim 1, characterized in that: Two material guide rollers (162) are provided, and the two material guide rollers (162) are staggered up and down and arranged at intervals on the upper part of the material guide mounting frame (161), and the diameter of the material guide roller (162) located at the upper position is greater than the diameter of the material guide roller (162) located at the lower position.

4. The steel strip winding device according to claim 3, characterized in that: The distance between the forming roller (163) and the guide roller (162) located below is smaller than the distance between the two guide rollers (162).

5. The steel strip winding device according to claim 1, characterized in that: A correction device (3) is arranged between the unwinding device (2) and the preforming device (16), the correction device (3) comprising a correction frame (31), at least one horizontal correction mechanism (32) and a length fixing mechanism (33) arranged on the correction frame (31), the horizontal correction mechanism (32) and the length fixing mechanism (33) both being located on the conveying path; The horizontal correction mechanism (32) comprises a correction mounting frame (321), a correction lifting mechanism (322), a first horizontal wheel group (323) and a second horizontal wheel group (324); the first horizontal wheel group (323) is positioned on the correction mounting frame (321); the second horizontal wheel group (324) is slidably connected to the correction mounting frame (321) and moves up and down along the height direction of the correction mounting frame (321); the lifting end of the correction lifting mechanism (322) is connected to the second horizontal wheel group (324); The length fixing mechanism (33) is used to measure the length of the steel strip (17) unwound by the unwound reel (22) when the unwound reel (22) unwound the steel strip (17).

6. The steel strip winding device according to claim 1, characterized in that: The pushing device (5) comprises a pushing frame (51), a supporting wheel group (52), a lower pressing wheel group (53), a pushing lifting mechanism (54) and a pushing rotating mechanism (55) arranged on the pushing frame (51), the lifting end of the pushing lifting mechanism (54) being connected to the lower pressing wheel group (53), and at least one of the supporting wheel groups (52) and / or at least one of the lower pressing wheel groups (53) being connected to the rotating end of the pushing rotating mechanism (55).

7. The steel strip winding device according to claim 1, characterized in that: The annealing device (4) comprises an annealing rack (41), and an inlet track (42), a spiral electric heating wire (43) and an outlet track (44) which are sequentially arranged on the annealing rack (41) along a conveying path, wherein the interior of the inlet track (42), the inner middle area of ​​the electric heating wire (43) and the interior of the outlet track (44) cooperate with each other to form the annealing channel (401).

8. The steel strip winding device according to claim 1, characterized in that: The processing device (6) comprises a guide sleeve (61) for the steel strip (17) to pass through, and a plurality of processing telescopic mechanisms (62) arranged around the guide sleeve (61), the telescopic ends of each processing telescopic mechanism (62) being provided with at least a pre-bending mechanism (15) and a cutting mechanism (9), the bending end of the pre-bending mechanism (15) being used to bend the steel strip (17) into an inner end (1801), and the cutting end of the cutting mechanism (9) being used to cut the steel strip (17); The winding device (7) comprises a winding column (71), a winding rotating mechanism (72), a cross slide mechanism (73) and a winding frame (74); the winding column (71) is arranged on the rotating end of the winding rotating mechanism (72); the winding rotating mechanism (72) is arranged on the moving end of the cross slide mechanism (73); the winding frame (74) is located on the conveying path and has a material withdrawal hole (7401) through which the winding column (71) is inserted; and a clamping groove (7101) is provided on the end surface of the winding column (71) for the inner end (1801) to be inserted; Material blocking plates (801) are provided on both sides of the material discharging and transporting device (8), and the winding frame (74) is located above the two material blocking plates (801); The pre-bending mechanism (15) comprises a bending mounting frame (151), a bending rotating mechanism (152) and a bending head (153); the bending mounting frame (151) is fixedly connected to the telescopic end of the horizontally arranged processing telescopic mechanism (62); the bending rotating mechanism (152) is fixedly connected to the bending mounting frame (151); the bending head (153) is fixedly connected to the rotating end of the bending rotating mechanism (152); a supporting gap (1501) and an end bending gap (1502) are formed on the bending head (153); one end of the steel strip (17) extending out of the guide sleeve (61) passes through the supporting gap (1501) and is bent by the bending head (153) under pressure and is bent into a U-shaped inner end (1801) in coordination with the end bending gap (1502).

9. The steel strip winding device according to claim 8, characterized in that: The cutter mechanism (9) comprises a cutter mounting frame (91) and a punching cutter (92); the cutter mounting frame (91) is fixedly connected to the telescopic end of the corresponding processing telescopic mechanism (62); and the punching cutter (92) is fixedly connected to a side of the cutter mounting frame (91) close to the guide sleeve (61).

10. A winding forming method of a steel strip winding device, implemented by a steel strip winding device as claimed in claim 8, characterized in that: The following steps are involved: S1, preparation work: setting operating parameters through a controller (1), placing the coiled steel strip (17) on an unwinding reel (22), and one end of the steel strip (17) passing through a preforming device (16), an annealing device (4), a pushing device (5), a processing device (6) and a winding device (7) in sequence along a conveying path; S2, switching between elastic bending mode and plastic bending mode: the screw rod translation mechanism (165) drives the material guide movable frame (164) to translate so that the material guide roller (162) translates relative to the forming roller (163), thereby adjusting the bending degree of the steel strip (17) when it passes around the forming roller (163), thereby switching the preforming device (16) to the elastic bending mode or the plastic bending mode; when the steel strip (17) passes around the forming roller (163), the angle between the two sides of the steel strip (17) is the bending angle, and the larger the bending angle, the smaller the bending degree of the steel strip (17) when it passes around the forming roller (163), and the smaller the bending angle, the larger the bending degree of the steel strip (17) when it passes around the forming roller (163). According to the condition of the steel strip (17) itself, the bending angle is adjusted so that the steel strip (17) undergoes elastic bending or plastic bending when it passes through the forming roller (163); S3, inner end processing: when the preforming device (16) is switched to the elastic bending mode, the steel strip (17) undergoes elastic deformation and then recovers the deformation when passing through the preforming device (16) in the elastic bending mode. After the steel strip (17) is located on the pushing device (5), the preforming device (16) is switched to the plastic bending mode. At the same time, the pushing device (5) pushes the steel strip (17) from the annealing device (4) to the processing device (6). The processing device (6) bends the steel strip (17) into the inner end (1801) through the pre-bending mechanism (15); S4, preparation for traction steel strip: the pre-bending mechanism (15) is retracted to disengage the inner end (1801), the winding device (7) adjusts the positions of the winding rotating mechanism (72) and the winding column (71) in the horizontal and vertical directions through the cross slide mechanism (73), and the winding column (71) passes through the material withdrawal hole (7401) so that the inner end (1801) is inserted into the clamping groove (7101); S5, steel strip winding process: the rotating end of the winding rotating mechanism (72) drives the winding column (71) to rotate to wind the steel strip (17), and the winding device (7) serves as a power source to pull the steel strip (17) along the conveying path. When the steel strip (17) passes through the preforming device (16) in the plastic bending mode, plastic deformation occurs. While the steel strip (17) is bent into an arc in the length direction, the steel strip (17) is plastically deformed in the width direction. Due to the relative stability of the material properties of the steel strip (17), this deformation is uniform, so that the steel strip (17) forms a uniform arc in the width direction; S6, annealing treatment: the elastically deformed or plastically deformed steel strip (17) passes through the annealing channel (401), and the annealing device (4) preheats the portion of the steel strip (17) passing through the annealing channel (401) to eliminate residual stress on the steel strip (17); S7, spring steel cutting: after the steel strip (17) on the winding column (71) is wound into a spring steel (18) in a reeled state, the winding device (7) stops, and the cutter mechanism (9) approaches the steel strip (17) through the corresponding processing telescopic mechanism (62) and its cutter end cuts the steel strip (17); S8, discharging of spring steel: after the spring steel (18) is cut, the winding device (7) adjusts the position of the winding column (71) in the longitudinal direction through the cross slide mechanism (73), so that the winding column (71) withdraws from the conveying path through the withdrawal hole (7401), and the spring steel (18) is separated from the winding column (71) and falls to the working surface of the discharging and transporting device (8) in the space between the two baffle plates (801), and the spring steel (18) is discharged along the working surface of the discharging and transporting device (8); S9, cyclic winding and forming: repeat S2 to S8 to carry out the cyclic work of winding the steel strip into spring steel.

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