A coiling machine device

Abstract

The present application belongs to the technical field of spring winding machine, especially relates to a spring winding machine device, which comprises a base, a display control console, a machine case, a feeding module, a guide plate, a coil diameter control module, a pitch control module and a cutter. The spring winding machine designed in the present application can form two steel wires with different diameters at one time, and the forming structures of the two steel wires are organically combined while considering the cost, instead of directly adding a set of forming structure of traditional single steel wire. The spring winding machine can form two steel wires at one time while reducing the cost as much as possible. The feeding module, the pitch control module, the core sleeve, the coil diameter control module and the guide plate can be replaced, and the corresponding feeding module, pitch control module, core sleeve, coil diameter control module and guide plate can be replaced according to different diameter models of steel wires and required coil diameter and pitch of the formed spring, which is convenient to use.

Description

Technical Field

[0001] This invention belongs to the field of spring coiling machine technology, and particularly relates to a spring coiling machine device. Background Technology

[0002] Torsion spring machines generally refer to mechanical equipment used to produce springs, and have evolved into automatic and CNC types. Based on functional characteristics, they are classified as: compression spring machines, extension spring machines, universal machines, disc spring machines, and specialized spring machines such as serpentine spring machines and torsion spring machines. Based on the drive method, they are classified as: semi-automatic, automatic, CNC, and fully computer-controlled.

[0003] Current spring coiling machines can only feed one steel wire at a time to manufacture springs, which is inefficient; if two steel wires could be fed at the same time, the manufacturing efficiency could be improved.

[0004] In the case of increasing to two steel wires, from the perspective of cost reduction, it is not appropriate to simply add a set to the original single steel wire processing structure. Instead, they should be organically combined. How to design an organically combined structure is one of the points that this invention aims to study.

[0005] In addition, the single-wire feeding roller can be adapted to different types of steel wires by adjusting the pressure structure. After switching to double-wire feeding, if the two steel wires are of different thicknesses, or to adapt to steel wires of different diameters, the clamping displacement of the two rollers when clamping at the same time will be different. If this can be achieved through a set of adjustable pressure mechanisms, this is also a point of research in this invention.

[0006] This invention designs a spring coiling machine to solve the above problems. Summary of the Invention

[0007] To achieve the above objectives, the present invention employs the following technical solutions:

[0008] A spring coiling machine includes a base, a display and control panel, a housing, a feeding module, a guide plate, a coil diameter control module, a pitch control module, and a cutter. The housing has clearance holes. The feeding module includes a fixed shell, upper rollers, lower rollers, mounting sliders, a first spring, and a motor. Three fixed shells are evenly and detachably mounted on the front side of the housing. Two mounting sliders are slidably mounted inside each fixed shell, and a first spring is installed between the two mounting sliders and the fixed shell. Four upper rollers are rotatably mounted between the two mounting sliders. Each upper roller has a semi-circular groove, and the semi-circular grooves on the four upper rollers correspond to four different diameter steel wires. A lower roller is rotatably mounted on the lower side of each fixed shell. The motor is fixedly mounted inside the housing and can control the rotation of the three lower rollers.

[0009] The guide plate has four guide grooves for steel wires to pass through; the four guide grooves correspond one-to-one with the four upper rollers in the feeding module.

[0010] The ring diameter control module includes a mounting bracket and ring diameter control blocks. The mounting bracket is fixedly installed on the front side of the chassis, and four ring diameter control blocks are detachably installed on the end of the mounting bracket facing the guide plate.

[0011] The pitch control module includes a mounting plate, a third limiting rod, a pitch control plate, a core sleeve, a mandrel, a fixing rod, a first sliding block, a second sliding block, and a leaf spring. The mounting plate is detachably mounted on the front side of the chassis. Two first sliding blocks and two second sliding blocks are symmetrically slidably mounted on the mounting plate. A pitch control plate is swayed at the end of each of the two second sliding blocks away from the mounting plate. A leaf spring with preload is installed between the pitch control plate and the corresponding second sliding block. A third limiting rod is fixedly mounted at the end of each first sliding block away from the mounting plate. The two third limiting rods correspond one-to-one with the two pitch control plates. The mandrel is fixedly mounted on the mounting plate via the fixing rod and is located in front of the pitch control plate. Four core sleeves are slidably mounted on the mandrel.

[0012] As a preferred embodiment, a transmission slide plate is slidably mounted on the inner side of the upper end of each fixed shell. A first adjusting screw is rotatably mounted on the upper end of the transmission slide plate. The upper end of the first adjusting screw protrudes from the upper end face of the corresponding fixed shell and is connected to the fixed shell by a threaded engagement. The first connecting rod is U-shaped and is slidably mounted inside the fixed shell and located on the lower side of the transmission slide plate. Two first springs and two guide rods nested within the first springs are symmetrically mounted between the upper end of the first connecting rod and the transmission slide plate. The guide rods are telescopic structures. Two mounting sliders are fixedly mounted on the lower end of the first connecting rod.

[0013] As a preferred embodiment, a fixed rotating shaft is installed between the two mounting sliders; four upper rollers are rotatably mounted on the fixed rotating shaft via a rolling bearing, and a thrust bearing is installed between adjacent upper rollers.

[0014] As a preferred embodiment, each fixed housing has a mounting shaft rotatably mounted at its lower end, and each mounting shaft has a lower roller fixedly mounted on it; the output shaft of the motor is connected to the three mounting shafts via a synchronous pulley and a synchronous belt.

[0015] As a preferred embodiment, a first threaded ring and a second threaded ring are installed on the outer circumference of each lower roller through a threaded engagement.

[0016] As a preferred embodiment, each lower roller has an L-shaped first and second limiting rod slidably installed inside it. One end of the first limiting rod extends upward through the outer surface of the corresponding lower roller and engages with the second threaded ring. A third adjusting screw is threadedly installed on the lower roller, with one end extending through the front end face of the lower roller and the other end connected to the other end of the first limiting rod via a rotary joint. One end of the second limiting rod extends upward through the outer surface of the corresponding lower roller and engages with the first threaded ring. The transmission rod is C-shaped and slidably installed inside the lower roller. Both the transmission rod and the second limiting rod have teeth, and a transmission gear is rotatably installed inside the lower roller. The transmission rod and the second limiting rod are located on the upper and lower sides of the transmission gear, respectively, and mesh with the transmission gear. The second adjusting screw is threadedly installed on the lower roller, with one end extending through the front end face of the lower roller and the other end connected to the transmission rod via a rotary joint.

[0017] As a preferred embodiment, the mounting bracket has a trapezoidal groove at one end facing the guide plate, and the diameter adjustment block has an arc-shaped groove at one end. A trapezoidal slider is fixedly installed at the other end of the diameter adjustment block. The four diameter adjustment blocks are installed on the mounting bracket through the cooperation of the trapezoidal slider and the trapezoidal groove. The mounting bracket is equipped with a clamping plate for fixing the diameter adjustment blocks installed on it. The clamping plate is detachably installed on the mounting bracket by bolts.

[0018] As a preferred embodiment, two fourth adjusting screws are symmetrically rotated and mounted on the mounting plate, and the two fourth adjusting screws are threadedly connected to the two first sliding blocks; two fifth adjusting screws are symmetrically rotated and mounted on the mounting plate, and the two fifth adjusting screws are threadedly connected to the two second sliding blocks.

[0019] As a preferred embodiment, the mandrel is fixedly mounted on the mounting plate by a fixing rod and is located in front of the pitch control plate. The mandrel has a guide groove, and a guide block is fixedly mounted on the mandrel sleeve. The four mandrel sleeves are mounted on the mandrel through the sliding cooperation between the guide block and the guide groove.

[0020] As a preferred embodiment, two limiting plates are detachably installed at both ends of the mandrel.

[0021] Compared with existing technologies, the advantages of this invention are:

[0022] 1. The spring coiling machine designed in this invention can form two steel wires with different diameters at one time. While taking cost into consideration, the forming structures of the two steel wires are organically combined, rather than simply adding a set to the traditional forming structure of a single steel wire. This achieves the forming of two steel wires at one time while minimizing costs.

[0023] 2. This invention controls the pressure of the four upper rollers on the steel wire by controlling the up and down sliding of the transmission slide plate through the first spring; for steel wires with a small difference in diameter corresponding to the upper rollers, this invention can make fine adjustments by controlling the first adjusting screw, and can push the steel wire with a small difference in diameter without replacing the upper pressure roller.

[0024] 3. The present invention can adjust all four upper rollers simultaneously through the first adjusting screw, which means that the pressure of the two working upper rollers on the two steel wires being pushed can be adjusted at the same time, making it more convenient to use.

[0025] 4. In order to ensure that the steel wire does not deviate during the pushing process, the present invention provides a first threaded ring and a second threaded ring on the lower roller. The two threaded rings limit the outward deviation of the two steel wires being pushed. The second threaded ring corresponds to the two inner upper rollers, and the first threaded ring corresponds to the two outer upper rollers.

[0026] 5. The present invention controls the sliding of the pitch control plate and the third limiting rod by rotating the fourth and fifth adjusting screws. The two work together to adjust the final swing angle between the pitch control plate and the second sliding block, that is, to adjust the pitch of the forming spring.

[0027] 6. The feeding module, pitch control module, core sleeve, coil diameter control module, and guide plate of this invention are replaceable. The corresponding feeding module, pitch control module, core sleeve, coil diameter control module, and guide plate can be replaced according to different diameter steel wires and the coil diameter and pitch of the spring to be formed, which makes it convenient to use. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall component appearance.

[0029] Figure 2 This is a schematic diagram of the distribution of the avoidance holes.

[0030] Figure 3 This is a schematic diagram showing the distribution of the feeding module and the diameter control module.

[0031] Figure 4 This is a schematic diagram of the pitch control module and the cutter distribution.

[0032] Figure 5 This is a schematic diagram of the feeding module.

[0033] Figure 6 This is a schematic diagram of the upper and lower rollers working together.

[0034] Figure 7 This is a schematic diagram of the upper roller installation.

[0035] Figure 8 This is a schematic diagram of the lower roller drive.

[0036] Figure 9 This is a schematic diagram of the lower roller structure.

[0037] Figure 10 This is a schematic diagram of the guide plate structure.

[0038] Figure 11 This is a schematic diagram of the pitch control module.

[0039] Figure 12 This is a schematic diagram of the mandrel installation.

[0040] Figure 13 This is a schematic diagram of the installation of the third limit rod and the pitch control plate.

[0041] Figure 14 This is a schematic diagram of the core sleeve installation.

[0042] Figure 15 This is a schematic diagram of the installation of the diameter adjustment block.

[0043] Labels in the diagram: 1. Base; 2. Display and control panel; 3. Chassis; 4. Feeding module; 5. Guide plate; 6. Ring diameter adjustment module; 7. Pitch adjustment module; 8. Clearance hole; 9. Cutter; 10. Fixed shell; 11. Upper roller; 12. Lower roller; 13. Mounting shaft; 14. Mounting slider; 15. First connecting rod; 16. First spring; 17. Guide rod; 18. Transmission slide plate; 19. First adjusting screw; 20. Fixed shaft; 21. Thrust bearing; 22. Motor; 23. Synchronous belt; 24. Synchronous pulley; 25. First threaded ring; 26. Second threaded ring; 27. First limit rod; 28. 29. Second limiting rod; 30. Transmission rod; 31. Transmission gear; 32. Second adjusting screw; 33. Third adjusting screw; 34. Guide groove; 35. Mounting plate; 36. Third limiting rod; 37. Pitch control plate; 38. Core sleeve; 39. Mandrel; 40. Fixed rod; 41. First sliding block; 42. Fourth adjusting screw; 43. Fifth adjusting screw; 44. Second sliding block; 45. Leaf spring; 46. Second connecting rod; 47. Limiting plate; 48. Guide block; 49. Guide groove; 50. Ring diameter control block; 51. Clamping plate; 52. Trapezoidal groove; 53. Trapezoidal slider; 54. Rolling bearing; 55. Mounting support. Implementation

[0044] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following embodiments and drawings are used to illustrate the present invention, but are not intended to limit the scope of the invention.

[0045] A spring coiling machine, such as Figure 1 , 3As shown, it includes a base 1, a display and control panel 2, a chassis 3, a feeding module 4, a guide plate 5, a diameter adjustment module 6, a pitch adjustment module 7, and a cutter 9, as follows. Figure 2 As shown, the chassis 3 has a clearance hole 8, and the front end of the clearance hole 8 has a circular conical surface.

[0046] In this invention, each fixed shell 10 of the feeding module 4 has four upper rollers 11, each corresponding to a steel wire of a certain diameter. Therefore, the feeding module 4 designed in this invention has four steel wire feeding channels of different diameters. However, in actual use, to prevent adjacent steel wires from spatially interfering with each other during feeding, and because the formed steel wire will move laterally under the action of the pitch control plate 36 during the coiling process, the four steel wire feeding channels in this invention share a single mandrel 38. That is, during the forming process, the formed steel wire can only move along the mandrel 38. The axis moves forward and backward, so the feeding module 4 designed in this invention only allows two steel wires to be formed at the same time. After one steel wire is formed, it moves forward under the action of the corresponding pitch control plate 36, while the other steel wire moves backward under the action of the corresponding pitch control plate 36. In order to prevent the housing 3 from affecting the steel wire moving backward, a clearance hole 8 is opened on the housing 3, and a circular conical surface is opened at the front end of the clearance hole 8 to ensure that the formed steel wire can slide smoothly into the clearance hole 8 and be discharged from the rear of the clearance hole 8.

[0047] like Figure 5 , 6 As shown in Figures 7, 8, and 9, the feeding module 4 includes a fixed housing 10, an upper roller 11, a lower roller 12, a mounting shaft 13, a mounting slider 14, a first connecting rod 15, a first spring 16, a guide rod 17, a transmission slide plate 18, a first adjusting screw 19, a fixed shaft 20, a thrust bearing 21, a motor 22, a synchronous belt 23, a synchronous pulley 24, a first threaded ring 25, a second threaded ring 26, a first limiting rod 27, a second limiting rod 28, a transmission rod 29, a transmission gear 30, a second adjusting screw 31, and a third adjusting screw 32. The three fixed housings 10 are evenly and detachably installed on the front side of the housing 3, as shown in Figures 3. Figure 6 As shown, a transmission slide plate 18 is slidably mounted up and down on the inner side of the upper end of each fixed shell 10. A first adjusting screw 19 is rotatably mounted on the upper end of the transmission slide plate 18. The upper end of the first adjusting screw 19 passes through the upper end face of the corresponding fixed shell 10 and is connected to the fixed shell 10 by a threaded engagement. Figure 6 , 7As shown, the first connecting rod 15 is inverted U-shaped and slides vertically within the fixed housing 10, located below the transmission slide plate 18. Two first springs 16 and two guide rods 17 nested within the first springs 16 are symmetrically installed between the upper end of the first connecting rod 15 and the transmission slide plate 18. The guide rods 17 are telescopic structures. Two mounting sliders 14 are installed at the lower end of the first connecting rod 15, and a fixed rotating shaft 20 is installed between the two mounting sliders 14. Four upper rollers 11 are rotatably mounted on the fixed rotating shaft 20 via rolling bearings 53, and thrust bearings 21 are installed between adjacent upper rollers 11. Each upper roller 11 has a semi-circular groove, and the semi-circular grooves on the four upper rollers 11 correspond to four different diameter steel wires. Each fixed housing 10 has a mounting shaft 13 rotatably mounted at its lower end, and each mounting shaft 13 has a lower roller 12 fixedly mounted on it. Figure 8 As shown, motor 22 is fixedly installed inside housing 3, and the output shaft of motor 22 is connected to the three mounting shafts 13 via synchronous pulleys 24 and synchronous belts 23; Figure 9 As shown, each lower roller 12 has a first threaded ring 25 and a second threaded ring 26 threadedly fitted onto its outer surface; each lower roller 12 has an L-shaped first limiting rod 27 and a second limiting rod 28 slidably fitted inside it, with one end of the first limiting rod 27 extending upward through the outer surface of the corresponding lower roller 12 and engaging with the second threaded ring 26; a third adjusting screw 32 is threadedly fitted onto the lower roller 12, with one end extending through the front end face of the lower roller 12 and the other end connected to the other end of the first limiting rod 27 via a rotary joint; one end of the second limiting rod 28... The transmission rod 29 extends upward through the outer surface of the corresponding lower roller 12 and engages with the first threaded ring 25; the transmission rod 29 is C-shaped and is slidably installed inside the lower roller 12; both the transmission rod 29 and the second limiting rod 28 have teeth, and the transmission gear 30 is rotatably installed inside the lower roller 12; the transmission rod 29 and the second limiting rod 28 are located on the upper and lower sides of the transmission gear 30 respectively and mesh with the transmission gear 30 respectively; the second adjusting screw 31 is installed on the lower roller 12 through a threaded engagement, one end of the second adjusting screw 31 extends through the front end face of the lower roller 12, and the other end of the second adjusting screw 31 is connected to the transmission rod 29 through a rotary joint.

[0048] The present invention can control the up-and-down movement of the first adjusting screw 19 relative to the fixed shell 10 by rotating the first adjusting screw 19. The movement of the first adjusting screw 19 drives the transmission slide plate 18 to move. Since the first spring 16 is installed between the transmission slide plate 18 and the first connecting rod 15, and the four upper rollers 11 are installed below the first connecting rod 15 through two mounting sliders 14 and a fixed rotating shaft 20, the pressure of the four upper rollers 11 on the steel wire can be controlled by controlling the up-and-down sliding of the transmission slide plate 18 through the first spring 16. When the diameter of the steel wire corresponding to the upper roller 11 is small, the present invention can make fine adjustments by controlling the first adjusting screw 19, and can push the steel wire with small diameter difference without replacing the upper pressure roller.

[0049] When the motor 22 is working, it can drive the three mounting shafts 13 to rotate through the synchronous pulley 24 and the synchronous belt 23. The rotation of the mounting shafts 13 drives the lower roller 12 to rotate. The rotation of the lower roller 12 pushes the steel wire to move. The movement of the steel wire will drive the upper roller 11 to rotate through friction.

[0050] The four upper rollers 11 of this invention have semi-circular grooves designed for four different diameter steel wires. During the pushing process, the steel wire gets stuck in the semi-circular grooves, which limit its oscillation. However, because the diameter of the steel wires targeted by the four upper rollers 11 increases sequentially from the inside to the outside, and the lower roller 12 is a circular roller with a constant outer diameter, the bottom surfaces of the semi-circular grooves on the four upper rollers 11 are distributed obliquely upwards from the inside to the outside. When pushing the steel wire, the upper roller 11 closer to the inside of the wire will have a certain effect on the inward displacement of the wire. While the upper roller 11, which is located on the outer side of the steel wire, has a semi-circular groove corresponding to a steel wire diameter larger than the wire being pushed, the pushed steel wire is prone to deviating outward. To ensure that the steel wire does not deviate during the pushing process, the present invention provides a first threaded ring 25 and a second threaded ring 26 on the lower roller 12. The two threaded rings restrict the outward deviation of the two steel wires being pushed. The second threaded ring 26 corresponds to the two inner upper rollers 11, and the first threaded ring 25 corresponds to the two outer upper rollers 11.

[0051] In this invention, since the first threaded ring 25 and the second threaded ring 26 are installed on the lower roller 12 through a threaded fit, when subjected to circumferential friction, the first threaded ring 25 and the second threaded ring 26 are easily driven to rotate relative to the lower roller 12, thereby changing their positions on the lower roller 12. In order to ensure the stability of the first threaded ring 25 and the second threaded ring 26 on the lower roller 12, this invention specifically sets a first limiting rod 27 and a second limiting rod 28. The first limiting rod 27 is located outside the second threaded ring 26 to limit the second threaded ring 26, and the second limiting rod 28 is located inside the first threaded ring 25 to limit the first threaded ring 25. By rotating the third adjusting screw 32, the first limiting rod 27 can be controlled to slide within the lower roller 12. By rotating the second adjusting screw 31, the transmission rod 29 can be controlled to slide within the lower roller 12. The transmission rod 29 drives the first limiting rod 27 to slide within the lower roller 12 through the transmission gear 30. The adjustment ends of the second adjusting screw 31 and the third adjusting screw 32 of the present invention are both located on the side of the lower roller 12 facing away from the machine housing 3, which makes adjustment more convenient.

[0052] The feeding module 4 of this invention is replaceable. When the diameter of the steel wire that can be pushed by the four upper rollers 11 cannot meet the feeding requirements of the steel wire being processed, the feeding module 4 can be removed and replaced with a suitable feeding module 4 to ensure that the upper rollers 11 in the feeding module 4 match the diameter of the steel wire being processed. The above-mentioned inability to meet the requirements means that even slight adjustment of the up and down position of the upper rollers 11 by the first adjusting screw 19 cannot meet the requirements.

[0053] In this invention, there is a gap between the inner circular surface of the upper roller 11 and the fixed rotating shaft 20, and there is a gap between adjacent upper rollers 11; the upper roller 11 and the fixed rotating shaft 20 are installed by a rolling bearing 53, and a thrust bearing 21 is installed between adjacent upper rollers 11; the reason for this design is to ensure that adjacent upper rollers 11 will not affect each other while ensuring the installation stability of the four upper rollers 11.

[0054] like Figure 3 , 4 As shown in Figure 10, a guide plate 5 is detachably installed on the front side of the housing 3. The guide plate 5 is located on the front side of the feeding module 4. The guide plate 5 has four guide grooves 33 for steel wires to pass through. The four guide grooves 33 correspond one-to-one with the four upper rollers 11 in the feeding module 4.

[0055] The guide plate 5 serves to guide the pushing steel wire.

[0056] like Figure 15As shown, the ring diameter adjustment module 6 includes a mounting bracket 54, a ring diameter adjustment block 49, and a clamping plate 50. The mounting bracket 54 is fixedly installed on the front side of the chassis 3. One end of the mounting bracket 54 facing the guide plate 5 has a trapezoidal groove 51. One end of the ring diameter adjustment block 49 has an arc-shaped groove, and the other end of the ring diameter adjustment block 49 is fixedly installed with a trapezoidal slider 52. The four ring diameter adjustment blocks 49 are installed on the mounting bracket 54 through the cooperation of the trapezoidal sliders 52 and the trapezoidal grooves 51. The mounting bracket 50 is installed on the mounting bracket 54 to fix the ring diameter adjustment blocks 49 installed on it. The clamping plate 50 is detachably installed on the mounting bracket 54 by bolts.

[0057] The coil diameter of the molded spring can be controlled by the coil diameter adjustment plate and the core sleeve 37. The coil diameter adjustment module of this invention is equipped with four different coil diameter adjustment plates, each corresponding to a certain model of spring coil diameter. During use, different coil diameter adjustment plates can be replaced according to the coil diameter requirements of different springs. When replacing, simply remove the retaining plate 50 and install the required coil diameter adjustment plate on the mounting bracket 54.

[0058] like Figure 11 As shown, the pitch control module 7 includes a mounting plate 34, a third limiting rod 35, a pitch control plate 36, a core sleeve 37, a mandrel 38, a fixing rod 39, a first sliding block 40, a fourth adjusting screw 41, a fifth adjusting screw 42, a second sliding block 43, a leaf spring 44, a second connecting rod 45, and a limiting plate 46. The mounting plate 34 is detachably mounted on the front side of the chassis 3. Figure 11 , 13 As shown, two first sliding blocks 40 and two second sliding blocks 43 are symmetrically slidably mounted on the mounting plate 34; two fourth adjusting screws 41 are symmetrically rotatably mounted on the mounting plate 34 and are threadedly connected to the two first sliding blocks 40; two fifth adjusting screws 42 are symmetrically rotatably mounted on the mounting plate 34 and are threadedly connected to the two second sliding blocks 43; as shown... Figure 13 As shown, a pitch adjustment plate 36 is oscillatingly mounted on the ends of the two second sliding blocks 43 away from the mounting plate 34. A leaf spring 44 is installed between the pitch adjustment plate 36 and the corresponding second sliding block 43, and the leaf spring 44 has a preload. A third limiting rod 35 is fixedly mounted on the end of the first sliding block 40 away from the mounting plate 34 through a second connecting rod 45. The two third limiting rods 35 correspond one-to-one with the two pitch adjustment plates 36. Figure 12 As shown, the mandrel 38 is fixedly mounted on the mounting plate 34 by the fixing rod 39 and is located on the front side of the pitch adjustment plate 36, as... Figure 14As shown, the spindle 38 has a guide groove 48, and the core sleeve 37 is fixedly installed with a guide block 47. The four core sleeves 37 are installed on the spindle 38 through the sliding cooperation between the guide block 47 and the guide groove 48. Two limiting plates 46 are detachably installed at both ends of the spindle 38.

[0059] Rotating the fourth adjusting screw 41 controls the sliding of the second sliding block 43 on the mounting plate 34, and the sliding of the second sliding block 43 drives the pitch control plate 36 to slide. When the third limiting rod 35 is stationary, controlling the sliding of the pitch control plate 36 also controls the swing angle of the pitch control plate 36 relative to the second sliding block 43. Rotating the fifth adjusting screw 42 controls the sliding of the first sliding block 40, and the sliding of the first sliding block 40 drives the third limiting rod 35 to slide via the second connecting rod 45. Controlling the sliding of the third limiting rod 35 adjusts the swing angle of the pitch control plate 36 relative to the second sliding block 43, i.e., controls the pitch of the molding spring. This invention controls the sliding of the pitch control plate 36 and the third limiting rod 35 by rotating the fourth adjusting screw 41 and the fifth adjusting screw 42, and the two work together to adjust the final swing angle between the pitch control plate 36 and the second sliding block 43, i.e., adjusts the pitch of the molding spring.

[0060] The mandrel 38 of this invention is provided with four different core sleeves 37, each core sleeve 37 corresponding to a spring coil diameter of a certain type. During use, different core sleeves 37 can be replaced according to the coil diameter requirements of different springs. When replacing, simply remove the limiting plate 46 and slide the required core sleeve 37 from both sides onto the mandrel 38 under the action of the guide block 47 and the guide groove 48. In this invention, since the middle of the mandrel 38 is fixed to the mounting plate 34 by the fixing rod 39, the four core sleeves 37 are inserted from both sides of the mandrel 38 when installing the core sleeves 37.

[0061] In this invention, the process of forming a spring from steel wire is the same as that of an existing side coil spring machine. The feeding device pushes the steel wire, which is then pushed to the coil diameter control module 6 under the guidance of the guide plate 5. Under the action of the coil diameter control block 49 and the core sleeve 37, the wire is bent into a circle and then moves outwards one coil at a time under the action of the pitch control plate 36, finally forming a helical spring.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A spring coiling machine, comprising a base, a display and control panel, a chassis, a feeding module, a guide plate, a coil diameter control module, a pitch control module, and a cutter, characterized in that: The casing has clearance holes; the feeding module includes a fixed shell, upper rollers, lower rollers, mounting sliders, a first spring, and a motor. Three fixed shells are evenly and detachably mounted on the front side of the casing. Two mounting sliders are slidably mounted inside each fixed shell, with a first spring installed between the two mounting sliders and the fixed shell. Four upper rollers are rotatably mounted between the two mounting sliders. Each upper roller has a semi-circular groove, corresponding to four different diameter steel wires. A lower roller is rotatably mounted on the lower side of each fixed shell. The motor is fixedly mounted inside the casing and controls the rotation of the three lower rollers. The guide plate has four guide grooves for steel wires to pass through; the four guide grooves correspond one-to-one with the four upper rollers in the feeding module; The ring diameter control module includes a mounting bracket and ring diameter control blocks. The mounting bracket is fixedly installed on the front side of the chassis, and four ring diameter control blocks are detachably installed on the end of the mounting bracket facing the guide plate. The pitch control module includes a mounting plate, a third limiting rod, a pitch control plate, a core sleeve, a mandrel, a fixing rod, a first sliding block, a second sliding block, and a leaf spring. The mounting plate is detachably mounted on the front side of the chassis. Two first sliding blocks and two second sliding blocks are symmetrically slidably mounted on the mounting plate. A pitch control plate is swayed at the end of each of the two second sliding blocks away from the mounting plate. A leaf spring with preload is installed between the pitch control plate and the corresponding second sliding block. A third limiting rod is fixedly mounted at the end of each first sliding block away from the mounting plate. The two third limiting rods correspond one-to-one with the two pitch control plates. The mandrel is fixedly mounted on the mounting plate via the fixing rod and is located in front of the pitch control plate. Four core sleeves are slidably mounted on the mandrel.

2. The spring coiling machine according to claim 1, characterized in that: A transmission slide plate is slidably mounted on the inner side of the upper end of each fixed shell. A first adjusting screw is rotatably mounted on the upper end of the transmission slide plate. The upper end of the first adjusting screw passes through the upper end face of the corresponding fixed shell and is connected to the fixed shell by a threaded engagement. The first connecting rod is U-shaped and is slidably mounted inside the fixed shell and located on the lower side of the transmission slide plate. Two first springs and two guide rods nested in the first springs are symmetrically mounted between the upper end of the first connecting rod and the transmission slide plate. The guide rods are telescopic structures. Two mounting sliders are fixedly mounted on the lower end of the first connecting rod.

3. The spring coiling machine according to claim 1, characterized in that: A fixed rotating shaft is installed between the two mounting sliders; four upper rollers are rotatably mounted on the fixed rotating shaft via a rolling bearing, and a thrust bearing is installed between adjacent upper rollers.

4. The spring coiling machine according to claim 1, characterized in that: Each fixed housing has a mounting shaft rotatably mounted at its lower end, and each mounting shaft has a lower roller fixedly mounted on it; the motor's output shaft is connected to the three mounting shafts via a synchronous pulley and a synchronous belt.

5. The spring coiling machine according to claim 1, characterized in that: Each lower roller has a first threaded ring and a second threaded ring installed on its outer circumference via a threaded fit.

6. The spring coiling machine according to claim 5, characterized in that: Each lower roller has an L-shaped first and second limiting rod slidably installed inside it. One end of the first limiting rod extends upward through the outer surface of the corresponding lower roller and engages with the second threaded ring. A third adjusting screw is threadedly installed on the lower roller, with one end extending through the front end face of the lower roller and the other end connected to the other end of the first limiting rod via a rotary joint. One end of the second limiting rod extends upward through the outer surface of the corresponding lower roller and engages with the first threaded ring. The transmission rod is C-shaped and slidably installed inside the lower roller. Both the transmission rod and the second limiting rod have teeth, and a transmission gear is rotatably installed inside the lower roller. The transmission rod and the second limiting rod are located on the upper and lower sides of the transmission gear, respectively, and mesh with the transmission gear. The second adjusting screw is threadedly installed on the lower roller, with one end extending through the front end face of the lower roller and the other end connected to the transmission rod via a rotary joint.

7. The spring coiling machine according to claim 1, characterized in that: The mounting bracket has a trapezoidal groove at one end facing the guide plate, and the diameter adjustment block has an arc-shaped groove at one end. A trapezoidal slider is fixedly installed at the other end of the diameter adjustment block. The four diameter adjustment blocks are installed on the mounting bracket through the cooperation of the trapezoidal slider and the trapezoidal groove. The mounting bracket is equipped with a clamping plate for fixing the diameter adjustment blocks installed on it. The clamping plate is detachably installed on the mounting bracket by bolts.

8. The spring coiling machine according to claim 1, characterized in that: Two fourth adjusting screws are symmetrically rotated and mounted on the mounting plate, and the two fourth adjusting screws are threadedly connected to the two first sliding blocks; two fifth adjusting screws are symmetrically rotated and mounted on the mounting plate, and the two fifth adjusting screws are threadedly connected to the two second sliding blocks.

9. The spring coiling machine according to claim 1, characterized in that: The mandrel is fixedly mounted on the mounting plate by a fixing rod and is located in front of the pitch control plate. The mandrel has a guide groove, and a guide block is fixedly mounted on the mandrel sleeve. The four mandrel sleeves are mounted on the mandrel through the sliding cooperation between the guide block and the guide groove.

10. A spring coiling machine according to claim 9, characterized in that: Two limiting plates can be detachably installed at both ends of the mandrel.

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