A steel strip winding device and its winding and forming method

Abstract

A steel strip winding device and its winding and forming method disclosed by the present invention include a controller, a unwinding device, a straightening device, an annealing device, a pushing device, a processing device, a winding device, and a discharging and transporting device that are sequentially arranged along the conveying path; the processing device includes a guide sleeve and a plurality of processing telescopic mechanisms, and the telescopic ends of each processing telescopic mechanism are respectively provided with a cutting knife mechanism, an upper clamping mechanism, a lower clamping mechanism, and a pre-bending mechanism. The steel strip winding device and its winding and forming method of the present invention control the coordinated operation of each device through the controller to realize the integration of each process, effectively improving the production efficiency of spring steel, ensuring the consistency of products, and realizing the continuous assembly line operation from steel strip to formed spring steel.

Description

Technical Field

[0001] The present invention relates to the technical field of manufacturing spiral springs, and particularly relates 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 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 an electric 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, due to the loss of the limit of the forming device, the spring steel in the wound state is likely to spread due to the impact during blanking, and manual sorting is still required. 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-mentioned technical problems, the technical solution of the present invention is: a steel strip winding device, including a controller, and a pay-off 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;

[0006] The pay-off device includes a storage rack and a pay-off reel, and the pay-off reel is located on the conveying path and winds a steel strip;

[0007] 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 lead screw 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. The steel strip is located between the material guiding roller and the forming roller, and 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 lead screw translation mechanism is connected to the material guiding movable frame;

[0008] The annealing device is provided with an annealing channel, and the annealing channel is located on the conveying path and allows the steel strip to pass through;

[0009] The pushing device is used to push the steel strip from the annealing device to the processing device;

[0010] 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;

[0011] 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, and a clamping groove for the inner end to be clamped is formed on the end surface of the winding column;

[0012] Both sides of the discharging and transporting device are provided with baffle plates, and the winding frame is located above the two baffle plates.

[0013] Preferably, the diameter length of the material guiding roller is greater than that of the forming roller.

[0014] Preferably, two material guiding rollers are provided, and the two material guiding rollers are arranged staggeredly up and down and spaced apart on 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.

[0015] 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.

[0016] Preferably, a rectifying device is provided between the unwinding device and the preforming device. The rectifying device includes a rectifying frame, at least one horizontal rectifying mechanism and a length fixing mechanism arranged on the rectifying frame. Both the horizontal rectifying mechanism and the length fixing mechanism are located on the conveying path;

[0017] The horizontal rectifying mechanism includes a rectifying mounting frame, a rectifying lifting mechanism, a first horizontal wheel set and a second horizontal wheel set. The first horizontal wheel set is positioned on the rectifying mounting frame. The second horizontal wheel set is slidably connected to the rectifying mounting frame and moves up and down along the height direction of the rectifying mounting frame. The lifting end of the rectifying lifting mechanism is connected to the second horizontal wheel set;

[0018] The length fixing mechanism is used to measure the length of the steel strip unwound by the unwinding reel when the unwinding reel unwinds the steel strip.

[0019] 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 are connected to the rotating end of the pushing rotating mechanism.

[0020] 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.

[0021] 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 is bent into the inner side end of a U shape in cooperation with the end bending gap.

[0022] 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.

[0023] A winding and forming method for a steel strip winding device includes the following steps:

[0024] S1, Preparation: Set the operating parameters through the controller, place the coiled steel strip on the unwinding reel, and one end of the steel strip passes through the preforming device, annealing device, pushing device, processing device, and winding device along the conveying path in sequence;

[0025] S2, Switching between elastic bending mode and plastic bending mode: 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 preforming device to the elastic bending mode or the plastic bending mode; When the steel strip winds around the forming roller, the included angle between the two 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 greater 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;

[0026] S3, Inner end processing: When the preforming device is switched to the elastic bending mode, the steel strip undergoes elastic deformation and then recovers when passing through the preforming device in the elastic bending mode. After the steel strip is located on the pushing device, the preforming device is switched to the plastic bending mode, and at the same time, the pushing device pushes the steel strip from the annealing device to the processing device. The processing device bends the steel strip into the inner end through the pre-bending mechanism;

[0027] S4, Preparation for pulling the steel strip: The pre-bending mechanism retracts and resets 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 unloading hole, the inner end is inserted into the clamping groove;

[0028] 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 acts as a power source to pull the steel strip along the conveying path. When the steel strip passes through the preforming 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;

[0029] S6, Annealing treatment: The elastically deformed or plastically deformed steel strip 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;

[0030] S7, Cutting of spring steel: After the steel strip on the winding column is wound into a coiled spring steel in the winding state, 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;

[0031] S8, spring steel discharging: after the spring steel is cut, the winding device adjusts the position of the winding column in the longitudinal direction through the cross slide mechanism, so that the winding column withdraws from the conveying path from the withdrawal hole, and the spring steel is separated from the winding column and falls to the working surface of the discharging and transporting device in the space between the two baffle plates, and the spring steel is discharged along the working surface of the discharging and transporting device;

[0032] S9, cyclic winding and forming: repeat S2 to S8 to carry out the cyclic work of winding the steel strip into spring steel.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 4. Under the action of the traction force of the winding device, during the plastic deformation process of the steel strip, the two side parts of the steel strip in the width direction tend to bend upward to adapt to the overall deformation trend of the steel strip, that is, the steel strip makes the steel strip adapt to the bending deformation toward the middle in the width direction through the internal stress adjustment, and the cross-section of the steel strip in the width direction is stretched into an arc shape, which can make the steel strip form the required spiral or scroll structure more naturally during the winding process, reduce the resistance and springback of the steel strip 17 during the winding process, and make the winding of the steel strip into spring steel smoother.

[0038] 5. The steel strip of the spring steel manufactured by this manufacturing equipment is arc-shaped in the width direction. Through the arc structure of the steel strip in the width direction, two adjacent steel strips are in contact with each other and limit each other, increasing the sliding resistance between two adjacent steel strips of the spring steel, effectively preventing the relative sliding between two adjacent steel strips of the spring steel, making the spring steel more stable, and avoiding the situation of loosening or winding chaos 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

[0039] Figure 1 is a schematic structural diagram of the manufacturing equipment in the embodiment.

[0040] Figure 2 is a schematic structural diagram of the straightening device and the preforming device in the embodiment.

[0041] Figure 3 is a cross-sectional view of the straightening device and the preforming device.

[0042] Figure 4 is a cross-sectional view of the annealing device in the embodiment.

[0043] Figure 5 is a schematic structural diagram of the annealing channel in the embodiment.

[0044] Figure 6 is a schematic structural diagram of the pushing device in the embodiment.

[0045] Figure 7 is a cross-sectional view of the pushing device in the embodiment.

[0046] Figure 8 is a schematic structural diagram of the processing device in the embodiment.

[0047] Figure 9 is a schematic structural diagram of the folding elbow in the embodiment Figure 1 .

[0048] Figure 10 is a schematic structural diagram of the folding elbow in the embodiment Figure 2 .

[0049] Figure 11It is a schematic structural diagram of the winding device and the discharging and transporting device in the embodiment.

[0050] Figure 12 It is a cross-sectional view of the winding device and the discharging and transporting device in the embodiment.

[0051] Figure 13 It is a schematic structural diagram of the limiting space in the embodiment.

[0052] Figure 14 It is a schematic structural diagram of the spring steel manufactured by the manufacturing equipment in the embodiment.

[0053] Figure 15 It is a cross-sectional view of the spring steel manufactured by the manufacturing equipment in the embodiment.

[0054] Figure 16 It is a schematic structural diagram when the preforming device switches to the plastic bending mode in the embodiment.

[0055] Figure 17 It is a schematic structural diagram when the preforming device switches to the elastic bending mode in the embodiment.

[0056] 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 rack; 322. Straightening lifting mechanism; 323. First horizontal wheel group; 324. Second horizontal wheel group; 33. Length fixing mechanism; 4. Annealing device; 401. Annealing channel; 402. Guiding curved surface; 41. Annealing rack; 42. Inlet tape channel; 43. Electric heating wire; 44. Outlet tape channel; 5. Pushing device; 51. Pushing rack; 52. Support wheel group; 53. Pressing wheel group; 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. Discharging and transporting device; 801. Baffle plate; 9. Cutting knife mechanism; 91. Cutting knife mounting rack; 92. Punching cutting knife; 10. Upper clamping mechanism; 11. Lower clamping mechanism; 12. Clamping mounting rack; 13. Clamping roller; 14. Limiting space; 15. Pre-bending mechanism; 1501. Support gap; 1502. End bending gap; 151. Bending mounting rack; 152. Bending rotating mechanism; 153. Bending head; 16. Preforming device; 161. Guide material mounting rack; 162. Guide material roller; 163. Forming roller; 164. Guide material movable frame; 165. Lead screw translation mechanism; 1601. Stroke rod; 1602. Stroke sleeve; 17. Steel strip; 18. Spring steel; 1801. Inner end. Detailed implementation manners

[0057] The present invention will be further described below in conjunction with embodiments and the accompanying drawings.

[0058] Reference Figure 1 , a steel strip 17 winding device, including a controller 1, and a 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 discharging and transporting device 8 which are controlled by the controller 1 and arranged in sequence along the conveying path.

[0059] The unwinding device 2 includes a storage rack 21 and a unwinding disk 22 rotatably connected to the storage rack 21. The controller 1 is arranged on the storage rack 21, and the unwinding disk 22 is located on the conveying path and winds the steel strip 17.

[0060] Reference Figure 2 , Figure 3 , the straightening device 3 includes a straightening rack 31, two horizontal straightening mechanisms 32 and a length determining mechanism 33 arranged on the straightening rack 31. The length determining mechanism 33 is located between two adjacent horizontal straightening mechanisms 32, and both the length determining mechanism 33 and each horizontal straightening mechanism 32 are located on the conveying path.

[0061] The horizontal straightening mechanism 32 includes a straightening mounting frame 321, a straightening 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 straightening mounting frame 321, the second horizontal wheel set 324 is slidably connected to the straightening mounting frame 321 and moves up and down along the height direction of the straightening mounting frame 321. The straightening lifting mechanism 322 is a telescopic cylinder, and the lifting end of the straightening lifting mechanism 322 is connected to the second horizontal wheel set 324.

[0062] The length determining mechanism 33 is located on the conveying path for measuring the length of the steel strip 17 unwound by the unwinding disk 22 when the unwinding disk 22 unwinds the steel strip 17. The length determining mechanism 33 is provided with a lower supporting wheel and an upper movable wheel. The upper movable wheel can be pressed down by 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 moving length of the coil can be accurately calculated, thereby realizing length determination measurement. The length determining mechanism 33 is a prior art and will not be elaborated in detail here.

[0063] 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 at an upper and lower interval on the material guiding movable frame 164. 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. 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 travel rod 1601, and the material guiding movable frame 164 is provided with a travel sleeve 1602 slidably connected to the travel 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. This is prior art and will not be elaborated in detail here.

[0064] 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. At the position 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 preforming device 16 can more accurately adjust the distance between the material guiding roller 162 and the forming roller 163 through the screw rod 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 preforming device 16 switches to the elastic bending mode or the plastic bending mode, which is more flexible to use and has better applicability.

[0065] The included 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 is. The smaller this bending angle is, the larger the bending degree of the steel strip 17 when it bypasses the forming roller 163 is. 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 preforming device 16 switches to the plastic bending mode, the steel strip 17 is conveyed in an R-shaped path through the two material guiding rollers 162 and the forming roller 163 in sequence. When the preforming device 16 switches to the elastic bending mode, the steel strip 17 is conveyed in a Z-shaped path through the material guiding roller 162 at the upper position and the forming roller 163 in sequence.

[0066] Reference Figure 4 , Figure 5, the annealing device 4 includes an annealing rack 41, and an inlet strip path 42, a spiral electric heating wire 43, and an outlet strip path 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 path 42, the middle area inside the electric heating wire 43, and the inside of the outlet strip path 44. The annealing channel 401 is located on the conveying path and allows the steel strip 17 to pass through. Preferably, a guiding surface 402 adapted to the steel strip 17 is formed between the opening inner walls of the inlet strip path 42 and the outlet strip path 44, and the guiding surface 402 guides the steel strip 17 to smoothly enter the annealing channel 401.

[0067] Reference Figure 6 , Figure 7 , the pushing device 5 includes a pushing rack 51, and a supporting wheel group 52, a pressing wheel group 53, a pushing lifting mechanism 54, and a pushing rotating mechanism 55 that are arranged on the pushing rack 51. The pushing lifting mechanism 54 is a telescopic cylinder, and there are two pushing lifting mechanisms 54, which are symmetrically arranged at the top of the pushing rack 51. The lifting end of the pushing lifting mechanism 54 is connected to the pressing wheel group 53. The supporting wheel group 52 is composed of three rotatable supporting wheels, and the pressing wheel group 53 is composed of three rotatable pressing wheels. The pushing rotating mechanism 55 is a rotating motor, and the pushing rotating mechanism 55 is slidably connected to the back side of the pushing rack 51. One blanking wheel at the middle position of the pressing wheel group 53 is connected to the rotating end of the pushing rotating mechanism 55.

[0068] 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 rack 51 and located on the conveying path. The hollow area of the guide sleeve 61 is adapted to the steel strip 17, and the flat 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, an electric cylinder, or a thruster. The telescopic ends of each processing telescopic mechanism 62 are at least respectively provided with a cutting tool 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 or eight, so that the staff can install different functional mechanisms such as visual inspection, punching mechanism, stamping mechanism, etc. according to requirements.

[0069] The cutting tool mechanism 9 includes a cutting tool mounting rack 91 and a punching and cutting tool 92. The cutting tool mounting rack 91 is fixedly connected to the telescopic end of the corresponding processing telescopic mechanism 62, and the punching and cutting tool 92 is fixedly connected to the side of the cutting tool mounting rack 91 close to the guide sleeve 61.

[0070] 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 horizontally arranged and rotatably connected to one side of the clamping mounting frame 12 close to the guide sleeve 61. The clamping rollers 13 of the upper clamping mechanism 10 and the lower clamping mechanism 11 are close to 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.

[0071] 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 the bending rotation mechanism 152 is fixedly connected to the bending mounting frame 151. The bending head 153 is the bending end of the pre-bending mechanism 15, and the bending head 153 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. The support gap 1501 allows one end of the steel strip 17 extending out of the guide sleeve 61 to pass through the support gap 1501 along the conveying path and be bent by the pressure of the bending head 153, and in cooperation with the end bending gap 1502, it is bent into the inner side end 1801 in a U shape.

[0072] Reference Figure 11 , Figure 12 The winding device 7 includes a winding column 71, a winding rotation mechanism 72, a cross slide table 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 and the pre-bending mechanism 15 are arranged opposite to each other. The winding rotation mechanism 72 is arranged on the moving end of the cross slide table mechanism 73. The cross slide table mechanism 73 refers to a combined slide table formed by two groups of linear slide tables combined in the X-axis direction and the Y-axis direction, and is usually also called a coordinate axis slide table or an XY-axis slide table, which is a prior art and will not be elaborated in detail here. The winding frame 74 is located on the conveying path and is penetrated with a discharging hole 7401 for inserting the winding column 71. The end of the winding column 71 passing through the discharging 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.

[0073] 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 discharging hole 7401 penetrates the side wall of the first support plate 742. The mounting bracket 741 is fixedly connected to the discharging conveying 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.

[0074] The discharging and transporting device 8 is a conveyor belt device, which is a prior art and will not be elaborated here in detail. The working surface of the discharging and transporting device 8 is inclined downward, and baffle plates 801 are arranged on both sides of the discharging and transporting device 8. The winding rack 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.

[0075] Reference Figures 1 to 15 , the working process and working principle of this manufacturing equipment are as follows:

[0076] S1, Preparation work: Set the operating parameters through the controller 1, place the wound 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;

[0077] 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 winding 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 both sides of the steel strip 17 when winding 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 winding around the forming roller 163 is, and the smaller this bending angle is, the larger the bending degree of the steel strip 17 when winding around the forming roller 163 is. 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;

[0078] 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, and 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;

[0079] S4, Preparation for pulling 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;

[0080] S5. Steel strip winding process: The rotating end of the winding and rotating mechanism 72 drives the winding column 71 to rotate to wind the steel strip 17. The winding device 7, as the power source, 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, plastic deformation occurs. While the steel strip 17 is bent into an arc shape in the length direction, plastic deformation also occurs in the width direction of the steel strip 17. And due to the relative stability of the material properties of the steel strip 17, this deformation shows uniformity, so that a uniform arc shape is formed in the width direction of the steel strip 17.

[0081] S6. Annealing treatment: The steel strip 17 with elastic deformation or plastic deformation passes through the annealing channel 401. The annealing device 4 pre-heats the part of the steel strip 17 passing through the annealing channel 401 to eliminate the residual stress on the steel strip 17.

[0082] S7. Spring steel cutting: After the steel strip 17 on the winding column 71 is wound into the coiled spring steel 18 in the winding state, the winding device 7 stops. The cutting tool mechanism 9 approaches the steel strip 17 through the corresponding processing telescopic mechanism 62 and its cutting tool end cuts the steel strip 17.

[0083] 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 exits the conveying path from the unloading hole 7401. The spring steel 18 disengages from the winding column 71 and falls onto the working surface of the discharging transport device 8 in the space between the two baffle plates 801. The spring steel 18 is discharged along the working surface of the discharging transport device 8.

[0084] 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.

[0085] This manufacturing equipment controls the coordinated work of each device through the controller 1, realizes 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 process, the annealing treatment, the spring steel cutting, and the spring steel discharging. By circulating the above steps, this manufacturing equipment effectively improves the production efficiency of the spring steel 18, ensures the consistency of the products, and realizes the continuous assembly line operation from the steel strip 17 to the formed spring steel 18.

[0086] During the process of the processing device 6 driving the steel strip 17 to wind around its upper surface to form the spring steel 18 through the winding device 7, the winding device 7 acts as a power source to traction the steel strip 17 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 undergoes elastic deformation through the guide roller 162 with a larger diameter length, enabling the steel strip 17 to adapt to a certain degree of bending deformation to preliminarily adapt to the bending state and prepare for subsequent plastic deformation. After that, the steel strip 17 bypasses the forming roller 163 with a smaller diameter length for plastic deformation. The guide roller 162 with a larger diameter length and the forming roller 163 with a smaller diameter length apply different effects on the steel strip 17 during the elastic deformation and plastic deformation stages respectively, which helps to optimize the stress distribution inside the steel strip 17, make the stress in the spring steel 18 more uniform, reduce the stress concentration phenomenon, make it easier for the steel strip 17 to be curled into the spring steel 18 during winding, and enable the spring steel 18 after winding to maintain better stability, avoiding the situation of springback or loosening of the spring steel 18 after winding.

[0087] 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 parts 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 towards 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 springback of the steel strip 17 during the winding process, and make it more smooth for the steel strip 17 to be wound into the spring steel 18.

[0088] 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, increasing the slip resistance between two adjacent layers of the steel strip 17 of the spring steel 18, effectively preventing the relative sliding between two adjacent layers of the steel strip 17 of the spring steel 18, making the spring steel 18 more stable, and avoiding 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 guaranteed. For the spring steel 18 with each layer of the steel strip 17 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 its winding and forming into a coil spring, thereby reducing the local stress concentration phenomenon. The arcs of each layer of the steel strip 17 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 from the spring steel 18 have better torque and product consistency.

[0089] Of course, the above are only typical examples of the present invention. In addition, the present invention may 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 includes a controller (1), a unwinding device (2), a preforming device (16), an annealing device (4), a pushing device (5), a processing device (6), a winding device (7) and an unloading and transporting device (8) which are controlled by the controller (1) and arranged in sequence along the conveying path; The unwinding device (2) includes a storage rack (21) and an unwinding disc (22). The unwinding disc (22) is located on the conveying path and has a steel strip (17) wound thereon; The preforming device (16) includes a guide material mounting frame (161), at least one guide roller (162), a forming roller (163), a guide material movable frame (164) and a screw rod translation mechanism (165). The forming roller (163) is arranged on the guide material mounting frame (161), the guide roller (162) is arranged on the guide material movable frame (164), the guide roller (162) and the forming roller (163) are arranged at intervals vertically. The steel strip (17) is attached to the guide roller (162) and bypasses the forming roller (163) along the circumferential direction of the guide roller (162). When the steel strip (17) is located between the guide roller (162) and the forming roller (163), 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 guide material movable frame (164) is slidably connected to the guide material mounting frame (161), and the translation end of the screw rod translation mechanism (165) is connected to the guide material 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 allows 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 equipment according to claim 1, characterized in that The diameter length of the guide roller (162) is greater than that of the forming roller (163); 3. A steel strip winding device according to claim 1, characterized in that, There are two guide rollers (162). The two guide rollers (162) are staggered vertically and arranged at intervals on the upper part of the guide material mounting frame (161). The diameter length of the guide roller (162) at the upper position is greater than that of the guide roller (162) at the lower position; 4. A steel strip winding device according to claim 3, characterized in that, The distance between the forming roller (163) and the guide roller (162) at the lower position is less than the distance between the two guide rollers (162); 5. A steel strip winding device according to claim 1, characterized in that, A rectifying device (3) is arranged between the unwinding device (2) and the preforming device (16). The rectifying device (3) includes a rectifying frame (31), at least one horizontal rectifying mechanism (32) and a fixed-length mechanism (33) arranged on the rectifying frame (31). Both the horizontal rectifying mechanism (32) and the fixed-length mechanism (33) are located on the conveying path; 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). 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 lifting end of the correction lifting mechanism (322) is connected to the second horizontal wheel set (324); The fixed-length mechanism (33) is used to measure the length of the steel strip (17) unwound from the unwinding reel (22) when the steel strip (17) is unwound from the unwinding reel (22).

6. A steel strip winding device according to claim 1, characterized in that, 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) provided on the pushing frame (51). The lifting end of the pushing lifting mechanism (54) is connected to the pressing wheel set (53). At least one of the supporting wheel set (52) and / or at least one of the pressing wheel set (53) is connected to the rotating end of the pushing rotating mechanism (55).

7. A steel strip winding device according to claim 1, characterized in that, The annealing device (4) includes an annealing frame (41), an inlet strip channel (42), a spiral electric heating wire (43), and an outlet strip channel (44) sequentially arranged on the annealing frame (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).

8. A steel strip winding device according to claim 1, characterized in that, The processing device (6) includes a guide sleeve (61) through which the steel strip (17) passes, and a plurality of processing telescopic mechanisms (62) arranged around the guide sleeve (61). The telescopic ends of the processing telescopic mechanisms (62) are at least respectively provided with a pre-bending mechanism (15) and a cutting tool mechanism (9). The bending end of the pre-bending mechanism (15) is used to bend the steel strip (17) into an inner side end (1801), and the cutting tool end of the cutting tool mechanism (9) is used to cut the steel strip (17); The winding device (7) includes 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 is provided with a discharging hole (7401) through which the winding column (71) is inserted. A clamping groove (7101) for the inner side end (1801) to be inserted is formed on the end face of the winding column (71); Blocking plates (801) are arranged on both sides of the discharging and transporting device (8). The winding frame (74) is located above the two blocking plates (801); 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 fixedly connected to the bending mounting frame (151). The bending head (153) is fixedly connected to the rotating end of the bending rotation 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), is pressed and bent by the bending head (153), and is bent into the inner end (1801) in a U shape in cooperation with the end bending gap (1502).

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

10. A winding forming method for a steel strip winding device, which is realized by a steel strip winding device according to claim 8, characterized in that It includes the following steps: S1, Preparation: Set the operating parameters through the controller (1). Place the wound steel strip (17) on the unwinding reel (22). One end of the steel strip (17) passes through the preforming device (16), the annealing device (4), the pushing device (5), the processing device (6) and the winding device (7) in sequence along the conveying path; S2, Switching between the elastic bending mode and the plastic bending mode: 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 the bending angle, the smaller the bending degree of the steel strip (17) when it winds around the forming roller (163). The smaller the bending angle, 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 the 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 of the traction 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 transverse and longitudinal directions through the cross slide table mechanism (73). After the winding column (71) passes through the material discharging hole (7401), the inner end (1801) is inserted into the clamping groove (7101). S5. Winding process of the steel strip: 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) along the conveying path. When the steel strip (17) passes through the pre-forming device (16) in the plastic bending mode, plastic deformation occurs. While the steel strip (17) is bent into an arc shape in the length direction, plastic deformation also occurs in the width direction of the steel strip (17). 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 steel strip (17) with elastic deformation or plastic deformation passes through the annealing channel (401). The annealing device (4) pre-heats the part of the steel strip (17) passing through the annealing channel (401) to eliminate the residual stress on the steel strip (17). S7. Cutting of the spring steel: After the steel strip (17) on the winding column (71) is wound into a 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. Discharging of the 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 table mechanism (73), so that the winding column (71) exits the conveying path from the material discharging hole (7401). The spring steel (18) disengages from the winding column (71) and falls onto the working surface of the discharging transport device (8) in the space between the two baffle plates (801). The spring steel (18) is discharged along the working surface of the discharging transport device (8). S9. Cyclic winding and forming: Repeat S2 to S8 to perform the cyclic operation of winding the steel strip into spring steel.

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