Manufacturing process of corrugated spring

Abstract

The invention relates to the technical field of spring production processes, and discloses a corrugated spring manufacturing process which comprises the following steps: S1, taking a steel wire rod main body with a rectangular section, winding into a corrugated circular ring, and cutting off at a position where the steel wire rod main body is wound for one circle; s2, laser welding is conducted on the cut-off position through optical fiber laser welding equipment, and a blank piece is obtained; s3, the blank is subjected to heat treatment to eliminate internal stress, and a semi-finished product is obtained; s4, the semi-finished product is subjected to surface treatment, and a finished product is obtained.The corrugated ring is directly formed, the corrugated treatment process is omitted while a flat ring is rolled, only stress heat treatment needs to be conducted on the product obtained after wave pressing forming, and the machining time and the production cost are saved; according to the process, the welding seam strength is optimized by optimizing laser welding conditions, oxidation and decarburization of workpieces are reduced by controlling the heat treatment heat preservation time after welding, meanwhile, the deformation stress of the spring is thoroughly eliminated, and the fatigue life and the use performance of the spring are more unified and stable.

Description

Technical Field

[0001] The invention relates to the technical field of spring production technology, in particular to a manufacturing process of a corrugated spring. Background Art

[0002] As a common elastic mechanical part, springs are indispensable in various industries, from aerospace and nuclear reactors to stationery and children's toys. In the prior art, springs can be divided into compression springs and corrugated springs. Compression springs are helical springs that bear positive pressure. There is a certain gap between the coils of the compression spring. When subjected to external loads, the spring contracts and deforms to store deformation energy, which is manifested as the external force being proportional to the compression amount, the stiffness being a constant value, and the force-displacement curve being a straight line. However, compression springs cannot meet the requirements of complex force-displacement curves.

[0003] Corrugated springs, also known as wave springs, are elastic elements with several peaks and valleys on a thin metal ring. They are usually used in situations where the load and deformation are not large, and where a small spring stiffness is required and an axial preload needs to be applied. Corrugated springs are particularly suitable for applications that require weight reduction and applications that are restricted by a small installation space. Typical areas of use include: aerospace, precision machinery, hydraulic seals, and high-end motors.

[0004] Corrugated springs are being selected by more and more products due to their excellent spatial structural characteristics. The processing process of a typical single-layer corrugated spring is: flat coil rolling, laser welding, heat treatment of weld points, wave forming, tempering, cleaning, oiling, and packaging.

[0005] Chinese patent document CN104084509A discloses a spring machine for forming wave springs, including a feed shaft hole and seven sliding knife seats, the seven sliding knife seats include: an upper left sliding knife seat and an upper right sliding knife seat, the ends of the upper left sliding knife seat and the ends of the upper right sliding knife seat are respectively provided with clamping blocks; a positive right sliding knife seat, the end of the positive right sliding knife seat is provided with a lever; an upper sliding knife seat, the end of the positive upper sliding knife seat is provided with an outer diameter tool for forming the outer diameter of the wave spring; a positive lower sliding knife seat, the lower sliding knife seat is provided with a rotating shaft for forming the crests and troughs of the wave spring, and the rotating shaft is connected to a rotating motor for controlling its rotation around its own central axis; a positive left sliding knife seat and a lower right sliding knife seat, the ends of the positive left sliding knife seat and the ends of the lower right sliding knife seat are respectively provided with mutually matching cutting tools; a process for forming wave springs is also disclosed.

[0006] The spring machine has a complex structure and a large number of tool seats. The cooperation between the tools needs to be reliably coordinated. The large number of tool movements leads to long waiting time, which slows down the production rhythm. In addition, its raw material is continuous ring-shaped incoming materials, which requires pre-processing of the ring-shaped incoming materials or purchase of the ring-shaped incoming materials before production. It is impossible to directly process the flat wire into a wave spring, which increases the processing time and production cost. Therefore, a manufacturing process of a corrugated spring is proposed. Summary of the invention

[0007] The object of the present invention is to provide a manufacturing process of a corrugated spring to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: a manufacturing process of a corrugated spring, comprising the following steps: S1. Take a steel wire with a rectangular cross section, wind it into a corrugated ring, and cut it off at the point where it is wound once; S2, laser welding the cut part with a fiber laser welding device to obtain a blank; S3, tempering the blank to eliminate internal stress and obtain a semi-finished product; S4. Perform surface treatment on the semi-finished product to obtain a finished product.

[0009] Preferably, in S2 above, the welding path of the fiber laser welding equipment adopts a spiral motion path, with a focal length of 100 to 1500 mm, an output power of 0.1 to 5 kW, a scanning speed of 50 to 1000 mm / s, and a spot diameter of 0.04 to 1 mm.

[0010] Preferably, in S3, the tempering treatment adopts a resistance heating furnace with an output power of 50 kW, a tempering temperature of 300 to 500° C., and a tempering time of 10 to 60 min.

[0011] Preferably, in S4, the surface treatment is ultrasonic cleaning for 30 to 60 minutes.

[0012] Preferably, in S1, the processing device used for winding into a flat coil and corrugating includes a base, a wire feeding assembly, a disassembly assembly, an ultrasonic flaw detector, a coiling assembly, a corrugating assembly, a cutting assembly, a flattening assembly and a support plate platform; A support plate platform is fixed on the top of the base, and an ultrasonic flaw detector for detecting defects on the steel wire body is installed on one side of the base; The ultrasonic flaw detector is electrically connected to a detection head located at one side of the steel wire body.

[0013] Preferably, the wire feeding assembly comprises four wire feeding wheels and a rotating shaft, and the bottom of the wire feeding wheel is provided with an annular groove for limiting the main body of the steel wire; A belt pulley is fixedly sleeved on the outer side of the rotating shaft, a belt is connected between the belt pulleys, and the outer side of the rotating shaft is rotatably connected to one side of the pallet platform through a bearing; Two motors are arranged on the lower side of the rotating shaft, and the axes of the output shaft ends of the two motors are fixed to the axes of two of the rotating shafts, and the bottoms of the other two rotating shafts are rotatably connected to one side of the base through bearings.

[0014] Preferably, the disassembly assembly comprises a connecting rod and two locking rods, one side of the locking rod is provided with a second slide groove, and the second slide groove is inclined; A horizontal plate is fixed at the bottom of the connecting rod, and two sliding rods are fixed at the bottom of the horizontal plate, and the outer sides of the sliding rods are slidably connected to the inner sides of the second sliding grooves; An insertion groove is provided inside the wire feeding wheel, two locking grooves are provided inside the insertion groove, a first sliding groove is provided inside the rotating shaft, and a spring is connected between the inner side wall of the first sliding groove and one side of the bottom of the horizontal plate; When the locking rod is inserted into the inner side of the locking groove, the wire feeding wheel and the rotating shaft are in a connected state, and when the locking rod leaves the inner side of the locking groove, the wire feeding wheel and the rotating shaft are in a separated state; The outer side of the rotating shaft is inserted into the inner side of the inserting groove, and the outer side of the connecting rod movably penetrates the top of the inner wall of the first sliding groove.

[0015] Preferably, the winding assembly comprises five support rods, one side of the five support rods is rotatably connected to a first guide wheel, a second guide wheel, a center wheel, a true circle compensation wheel and a bending wheel through bearings; The first guide wheel, the center wheel and the true circle compensation wheel are slidably connected to one side of the steel wire body, and the second guide wheel and the bending wheel are slidably connected to the other side of the steel wire body; The bottom of the support rod is installed on one side of the top of the base.

[0016] Preferably, the corrugating assembly comprises a support frame, a first cylinder is mounted on one side of the support frame, a connecting block is fixed to the push rod end of the first cylinder, and a corrugating knife for corrugating the steel wire body is mounted on one side of the connecting block; A baffle located on one side of the steel wire body is fixed on one side of the top of the support platform; The cutter assembly comprises a first support plate, a stepper motor is mounted on one side of the first support plate, a flange is mounted on the output shaft end of the stepper motor, a second support plate is fixed on one side of the flange, and a connecting column is fixed on one side of the second support plate; A second cylinder is fixed on one side of the connecting column, and a cutter located on one side of the steel wire body is fixed on the push rod end of the second cylinder; A connecting plate is fixed on the outer side of the second supporting plate, and a cutting seat is fixed on one side of the connecting plate; The cutter and the cutter seat are respectively located on both sides of the steel wire body, and the bottoms of the support frame and the first support plate are fixed to the top of the base.

[0017] Preferably, the flattening assembly comprises two fixing frames, one side of the fixing frame is provided with a third slide groove, and the inner side of the third slide groove is slidably connected with a placement frame; The bottom of the placement rack is rotatably connected to a plurality of rollers slidably connected to one side of the top of the steel wire body through bearings; A limiting plate is fixed on one side of the fixing frame, a bolt threadedly connected to one side of the placing frame is inserted into one side of the limiting plate, and the bottom of the fixing frame is fixed to one side of the top of the pallet platform.

[0018] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects: The present invention provides a new process for forming corrugations while rolling a flat coil, thereby eliminating the weld scar annealing heat treatment process before wave forming, and only needs to perform stress tempering on the product after wave forming, thereby saving processing time and production cost; the process also optimizes the weld strength by optimizing laser welding conditions, reduces oxidation and decarburization of the workpiece by controlling the tempering and holding time after welding, and at the same time completely eliminates the deformation stress of the spring, making the fatigue life and performance of the spring more uniform and stable; finally, through aging heat treatment, the elastic deformation force is eliminated, so that the precise processing shape of the parts is retained, thereby ensuring various technical indicators of the spring and improving the fatigue life and reliability of the spring.

[0019] The present invention provides a manufacturing process for a corrugated spring, wherein flat coil rolling, wave forming and truncation are completed by a processing device, and a coil rolling component and a wave forming component are provided, so that the two steps of flat coil rolling and wave forming can be completed simultaneously, thus saving an annealing heat treatment process; due to the limiting effect of a support plate platform, an annular groove and a baffle on a steel wire main body, the flatness and inner and outer diameter dimensions of the rolled flat coil are stable, and the problem of up and down or left and right misalignment affecting the welding strength will not occur during welding.

[0020] The present invention controls the cutter to reciprocate axially through the second cylinder, and cooperates with the cutter seat to complete the cutting of the wire, while the stepper motor can control the cutter to rotate radially to change the cutting angle. Compared with the vertical incision formed in the ordinary process, the cutter assembly can cut the wire to form sloped incisions of different angles. Since the sloped incision has a large overlapping area, the welding of the wire cut can be made more firm. In addition, since the wire is generally cut at the crest and trough, this area belongs to the stress concentration area of ​​the corrugated spring. The sloped incision can make the wires overlap with each other at the first position, thereby withstanding higher external force extrusion, giving the prepared corrugated spring better stiffness and toughness.

[0021] By using the ultrasonic flaw detector to display the test results in real time, workers can monitor the quality status of the steel wire body in real time. Once a problem is found, they can take immediate measures to promptly detect and replace the problematic steel wire body, thereby avoiding the use of the problematic steel wire body in subsequent production, thereby reducing material waste and increased production costs.

[0022] The automatic retraction and expansion of the locking rod is achieved through the sliding cooperation of the inclined second slide groove and the slide rod. The operator can easily complete the disassembly and assembly without complicated tools or professional skills. The steps of disassembling and installing the wire feed wheel are simple and clear. Just press the connecting rod to easily remove or install the wire feed wheel, which greatly shortens the maintenance time and improves work efficiency.

[0023] By rotating the bolt and the threaded connection of the placement rack, the height of the placement rack on the inner side of the third slide slot can be easily adjusted. The uniform distribution and rolling action of the rollers can ensure that the steel wire body remains flat during the transportation process, avoiding the problem of subsequent processing quality affected by bending or uneven wire. The flattening component can be applied to steel wire bodies of different heights, increasing the flexibility and applicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the structure of the processing device of the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the present invention; Figure 3 It is a schematic diagram of the front cross-sectional structure of the lock rod of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the first locking rod of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the second locking rod of the present invention; Figure 6 It is a structural schematic diagram of the wave beating component of the present invention; Figure 7 It is a structural schematic diagram of the cutter assembly of the present invention; Figure 8 It is a structural schematic diagram of the flattening assembly of the present invention; Fig. 9 This is a schematic diagram of the sloped incision structure of the process of the present invention; Fig.10 It is a schematic diagram of the vertical incision structure of the common process of the present invention.

[0026] Explanation of the reference numerals: 1. base; 2. wire feeding assembly; 21. wire feeding wheel; 22. annular groove; 23. pulley; 24. rotating shaft; 25. motor; 3. disassembly assembly; 31. connecting rod; 32. cross plate; 33. first slide groove; 34. insertion groove; 35. locking groove; 36. locking rod; 37. spring; 38. second slide groove; 39. slide rod; 4. ultrasonic flaw detector; 5. winding coil assembly; 51. support rod; 52. first guide wheel; 53. second guide wheel; 54. center wheel; 55. true circle compensation wheel; 56. bending wheel ;6. Corrugating assembly;61. Support frame;62. First cylinder;63. Connecting block;64. Baffle;65. Corrugating knife;7. Cutter assembly;71. Stepper motor;72. First supporting plate;73. Flange;74. Connecting column;75. Second cylinder;76. Cutter;77. Cutter seat;78. Second supporting plate;79. Connecting plate;8. Steel wire body;9. Flattening assembly;91. Fixing frame;92. Bolt;93. Placement frame;94. Third slide groove;95. Limiting plate;96. Roller;10. Supporting platform. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application. Example

[0029] See also Figure 1-10 The present invention provides a technical solution: a manufacturing process of a corrugated spring, comprising the following steps: S1, take a steel wire body 8 with a rectangular cross section, wind it into a corrugated ring, and cut it off at the point where it is wound once; S2, laser welding the cut part with a fiber laser welding device to obtain a blank; The welding path of the fiber laser welding equipment adopts a spiral motion path, with a focal length of 800mm, an output power of 3kW, a scanning speed of 500mm / s, and a spot diameter of 0.4mm.

[0030] S3, tempering the blank to eliminate internal stress and obtain a semi-finished product; The tempering treatment adopts a resistance heating furnace with an output power of 50kw, a tempering temperature of 400℃, and a tempering time of 45min.

[0031] S4. Perform surface treatment on the semi-finished product to obtain a finished product.

[0032] The surface treatment was ultrasonic cleaning for 45 min.

[0033] The processing device used for winding and corrugating includes a base 1, a wire feeding assembly 2, a disassembly assembly 3, an ultrasonic flaw detector 4, a coiling assembly 5, a corrugating assembly 6, a cutting assembly 7, a flattening assembly 9 and a support plate platform 10; A support plate platform 10 is fixed on the top of the base 1. The support plate platform 10 is parallel to the bottom of the steel wire body 8 and supports the steel wire body 8 to prevent the coiled ring from being misaligned up and down or left and right to affect its dimensional stability and subsequent welding strength. An ultrasonic flaw detector 4 for defect detection of the steel wire body 8 is installed on one side of the base 1; The ultrasonic flaw detector 4 is electrically connected to a detection head located on one side of the steel wire body 8, and the model of the ultrasonic flaw detector 4 is EPOCH 650; when the detection head detects hidden damage inside the steel wire body 8, the display screen of the ultrasonic flaw detector 4 prompts the worker, and the worker needs to stop the motor 25, check and replace the steel wire body 8. The ultrasonic flaw detector 4 displays the detection results in real time, and the worker can monitor the quality status of the steel wire body 8 in real time. Once a problem is found, measures can be taken immediately to detect and replace the problematic steel wire body 8 in time, so as to avoid using the problematic steel wire body 8 in subsequent production, thereby reducing material waste and increased production costs.

[0034] The wire feeding assembly 2 includes four wire feeding wheels 21 and a rotating shaft 24. The bottom of the wire feeding wheel 21 is provided with an annular groove 22 for limiting the steel wire main body 8. The annular groove 22 cooperates with the support platform 10 to limit the steel wire main body 8 and push the steel wire main body 8 forward through friction. A pulley 23 is fixedly sleeved on the outer side of the rotating shaft 24, and a belt is connected between the pulleys 23. The outer side of the rotating shaft 24 is rotatably connected to one side of the support platform 10 through a bearing. Two motors 25 are arranged on the lower side of the rotating shaft 24. The output shaft ends of the two motors 25 are fixed at the axis centers of two of the rotating shafts 24, and the bottoms of the other two rotating shafts 24 are rotatably connected to one side of the base 1 through bearings.

[0035] The annular groove 22 arranged at the bottom of the wire feeding wheel 21 cooperates with the support platform 10 to play a good limiting role on the steel wire body 8, ensuring that the steel wire body 8 will not deviate from the predetermined path during the transportation process, thereby achieving stable and reliable transportation.

[0036] When the wire feeding wheel 21 is worn, it is only necessary to push the connecting rod 31 downward to remove the wire feeding wheel 21 for replacement. The disassembly assembly 3 includes a connecting rod 31 and two locking rods 36. A second slide groove 38 is provided on one side of the locking rod 36. The second slide groove 38 is inclined. A cross plate 32 is fixed to the bottom of the connecting rod 31. Two slide rods 39 are fixed to the bottom of the cross plate 32. The outer side of the slide rod 39 is slidably connected to the inner side of the second slide groove 38. An insertion groove 34 is provided inside the wire feeding wheel 21. The insertion groove 34 is provided inside the insertion groove 34. Two locking grooves 35 are provided on the side, and a first sliding groove 33 is opened inside the rotating shaft 24. A spring 37 is connected between the inner wall of the first sliding groove 33 and one side of the bottom of the cross plate 32; when the locking rod 36 is inserted into the inner side of the locking groove 35, the wire feeding wheel 21 and the rotating shaft 24 are in a connected state, and when the locking rod 36 leaves the inner side of the locking groove 35, the wire feeding wheel 21 and the rotating shaft 24 are in a separated state; the outer side of the rotating shaft 24 is inserted into the inner side of the insertion groove 34, and the outer side of the connecting rod 31 moves through the top of the inner wall of the first sliding groove 33.

[0037] When the connecting rod 31 is pressed downward, the connecting rod 31 pushes the cross plate 32 and the two slide bars 39 to move downward, so that the slide bar 39 slides inside the second slide groove 38, and the cross plate 32 compresses the spring 37. Since the second slide groove 38 is inclined, when the slide bar 39 moves downward, the two locking rods 36 approach each other, so that the two locking rods 36 leave the inner side of the locking groove 35, and the wire feeding wheel 21 can be pulled upward to make the wire feeding wheel 21 leave the outer side of the rotating shaft 24, and the wire feeding wheel 21 can be removed; Take a new wire feeding wheel 21, sleeve the wire feeding wheel 21 on the outer side of the rotating shaft 24, and then press the connecting rod 31 downward to retract the locking rod 36 into the inner side of the first sliding groove 33, and then release the pressure on the connecting rod 31. At this time, under the elastic force of the spring 37, the locking rod 36 is pushed to insert into the inner side of the locking groove 35, and the wire feeding wheel 21 can be disassembled and assembled; Through the sliding cooperation between the inclined second slide groove 38 and the slide rod 39, the automatic contraction and expansion of the locking rod 36 is realized. Without complicated tools or professional skills, the operator can easily complete the disassembly and assembly. The steps of disassembling and installing the wire feeding wheel 21 are simple and clear. Only by pressing the connecting rod 31, the wire feeding wheel 21 can be easily removed or installed, which greatly shortens the maintenance time and improves work efficiency.

[0038] The coil assembly 5 includes five support rods 51, and one side of the five support rods 51 is rotatably connected to the first guide wheel 52, the second guide wheel 53, the center wheel 54, the true circle compensation wheel 55 and the bending wheel 56 through bearings; the first guide wheel 52, the center wheel 54 and the true circle compensation wheel 55 are slidably connected to one side of the steel wire body 8, and the second guide wheel 53 and the bending wheel 56 are slidably connected to the other side of the steel wire body 8. The bottom of the support rod 51 is installed on the top side of the base 1, and the support rod 51 is installed on the top side of the base 1 through an adjusting bolt (not shown in the figure). By adjusting the adjusting screw, the distance between the first guide wheel 52, the second guide wheel 53 and the center wheel 54 can be controlled, thereby adjusting the center position of the rolled flat coil. The adjusting screw can also control the position of the true circle compensation wheel 55 and the bending wheel 56, thereby controlling the radius of the rolled flat coil.

[0039] The corrugating assembly 6 is used to corrugate the wire after flattening to form wave peaks and troughs. The corrugating assembly 6 includes a support frame 61, a first cylinder 62 is installed on one side of the support frame 61, a connecting block 63 is fixed on the push rod end of the first cylinder 62, and a corrugating knife 65 for corrugating the steel wire body 8 is installed on one side of the connecting block 63; a baffle 64 located on one side of the steel wire body 8 is fixed on one side of the top of the support plate platform 10; The wire feeding assembly 2 conveys the steel wire main body 8, which is rolled into a flat coil through the coil winding assembly 5. The two corrugating knives 65 of the corrugating assembly 6 move up and down synchronously. When moving up, the corrugating knife 65 at the lower end pushes the coil up to form a wave peak, and the baffle 64 limits the steel wire main body 8. When moving down, the corrugating knife 65 at the upper end pushes the coil down to form a wave trough. The support platform 10 supports the steel wire main body 8, and an air source for supplying air to the first cylinder 62 is provided on one side of the base 1.

[0040] The cutter assembly 7 includes a first support plate 72, a stepper motor 71 is installed on one side of the first support plate 72, a flange 73 is installed on the output shaft end of the stepper motor 71, a second support plate 78 is fixed on one side of the flange 73, and a connecting column 74 is fixed on one side of the second support plate 78; a second cylinder 75 is fixed on one side of the connecting column 74, and a cutter 76 located on one side of the steel wire body 8 is fixed on the push rod end of the second cylinder 75; a connecting plate 79 is fixed on the outer side of the second support plate 78, and a cutter seat 77 is fixed on one side of the connecting plate 79; the cutter 76 and the cutter seat 77 are respectively located on both sides of the steel wire body 8, and the bottom of the support frame 61 and the first support plate 72 are fixed to the top of the base 1, and a power source is provided in the base 1 to supply air to the second cylinder 75.

[0041] The cutter 76 and the cutter seat 77 are respectively located on both sides of the steel wire body 8. The second cylinder 75 moves along the axial direction to cut the steel wire body 8. The cutter seat 77 supports the steel wire body 8 during cutting. The stepper motor 71 can control the cutter 76 to change the angle around the axial direction, so that the steel wire body 8 forms a sloped incision (such as Fig. 9 As shown), the angle of the slope cut is 30°; At the same time, the angle of the sloped incision is 10° to 80°, and can also be any angle value between 10° and 80°.

[0042] The flattening assembly 9 includes two fixed frames 91, one side of which is provided with a third slide groove 94, and the inner side of the third slide groove 94 is slidably connected to a placement frame 93; the bottom of the placement frame 93 is rotatably connected to a plurality of rollers 96 slidably connected to the top side of the steel wire body 8 through bearings; a limit plate 95 is fixed to one side of the fixed frame 91, and a bolt 92 threadedly connected to one side of the placement frame 93 is inserted into one side of the limit plate 95, and the bottom of the fixed frame 91 is fixed to the top side of the pallet platform 10.

[0043] After the wire is conveyed by the wire feeding assembly 2, multiple rollers 96 roll and contact the top of the steel wire body 8. At this time, multiple rollers 96 perform a leveling process on the steel wire body 8, and at the same time, the bolt 92 is rotated the same number of times, so that the bolt 92 is threadedly connected to the placement rack 93, so that the placement rack 93 slides on the inside of the third slide groove 94. When the bolt 92 is rotated different numbers of times, the placement rack 93 is at different heights from the pallet platform 10. At this time, the steel wire bodies 8 at different heights can be leveled.

[0044] By rotating the bolt 92 and the threaded connection of the placement rack 93, the height of the placement rack 93 on the inner side of the third slide groove 94 can be easily adjusted. The uniform distribution and rolling action of the roller 96 can ensure that the steel wire body 8 remains flat during the transportation process, avoiding the problem of subsequent processing quality affected by bending or unevenness of the wire, so that the flattening component 9 can be suitable for steel wire bodies 8 of different heights, increasing the flexibility and applicability of the equipment.

[0045] The previous process: rolling the coil, laser welding, heat treatment of the solder joints, wave forming, tempering, cleaning, oiling, and packaging. The rolling and wave forming are completed in two steps. After the coil is rolled, the ends of the coil need to be welded to form a complete closed coil. Before wave forming, the solder joints need to be annealed and heat treated, and then waved to form wave peaks and valleys on the coil. The process provided by the present invention completes the rolling and wave forming operations at the same time, thus eliminating the step of annealing and heat treating the solder joints before wave forming. The previous process adopts the method of vertically winding flat coils. During the winding process, the flatness and inner and outer diameter dimensions of the rolled flat coils are unstable due to the influence of the flat coils' own gravity, which will cause misalignment during subsequent welding and butt jointing, affecting the welding strength. The process provided by the present invention solves the problem of unstable dimensions and flatness of the rolled flat coils due to the support of the support plate platform 10; The process provided by the present invention controls the wire cutting position to be at the crest or trough of the corrugated spring through the PLC program. During subsequent welding, the sloped cuts at the head and tail of the single-turn wave spring overlap each other. Fig. 9 , compared with the vertical incisions formed in the conventional process such as Fig.10 The sloped incision has a larger overlapping area, which can make the welding point more solid, and at the same time enable the crests and troughs to withstand higher external forces.

[0046] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. A manufacturing process for a corrugated spring, characterized in that: The following steps are involved: S1, taking a steel wire body (8) with a rectangular cross-section, winding it into a corrugated ring, and cutting it at the point where it is wound once; S2, laser welding the cut part with a fiber laser welding device to obtain a blank; S3, tempering the blank to eliminate internal stress and obtain a semi-finished product; S4. Perform surface treatment on the semi-finished product to obtain a finished product.

2. A manufacturing process for a corrugated spring according to claim 1, characterized in that: In S2, the welding path of the optical fiber laser welding equipment adopts a spiral motion path, with a focal length of 100 to 1500 mm, an output power of 0.1 to 5 kW, a scanning speed of 50 to 1000 mm / s, and a spot diameter of 0.04 to 1 mm.

3. The manufacturing process of a corrugated spring according to claim 1, characterized in that: In S3, the tempering treatment adopts a resistance heating furnace with an output power of 50kw, a tempering treatment temperature of 300-500°C, and a tempering treatment time of 10-60min.

4. The manufacturing process of a corrugated spring according to claim 1, characterized in that: In S4, the surface treatment is ultrasonic cleaning for 15 to 60 minutes.

5. The manufacturing process of a corrugated spring according to claim 1, characterized in that: In S1, the processing device used for winding into a flat coil and corrugating comprises a base (1), a wire feeding assembly (2), a disassembly assembly (3), an ultrasonic flaw detector (4), a coiling assembly (5), a corrugating assembly (6), a cutting assembly (7), a flattening assembly (9) and a support plate platform (10); A support plate platform (10) is fixed on the top of the base (1), and an ultrasonic flaw detector (4) for detecting defects on the steel wire body (8) is installed on one side of the base (1); The ultrasonic flaw detector (4) is electrically connected to a detection head located on one side of the steel wire body (8).

6. A manufacturing process for a corrugated spring according to claim 5, characterized in that: The wire feeding assembly (2) comprises four wire feeding wheels (21) and a rotating shaft (24); the bottom of the wire feeding wheel (21) is provided with an annular groove (22) for limiting the position of the steel wire body (8); A belt pulley (23) is fixedly sleeved on the outer side of the rotating shaft (24), a belt is connected between the belt pulleys (23), and the outer side of the rotating shaft (24) is rotatably connected to one side of the pallet platform (10) via a bearing; Two motors (25) are arranged on the lower side of the rotating shaft (24); the output shaft ends of the two motors (25) are fixed at the shaft centers of two of the rotating shafts (24); and the bottoms of the other two rotating shafts (24) are rotatably connected to one side of the base (1) via bearings.

7. A manufacturing process for a corrugated spring according to claim 6, characterized in that: The disassembly assembly (3) comprises a connecting rod (31) and two locking rods (36); a second sliding groove (38) is provided on one side of the locking rod (36); and the second sliding groove (38) is arranged to be inclined; A transverse plate (32) is fixed to the bottom of the connecting rod (31), and two sliding rods (39) are fixed to the bottom of the transverse plate (32), wherein the outer sides of the sliding rods (39) are slidably connected to the inner sides of the second sliding grooves (38); An insertion groove (34) is provided inside the wire feeding wheel (21), two locking grooves (35) are provided inside the insertion groove (34), a first sliding groove (33) is provided inside the rotating shaft (24), and a spring (37) is connected between the inner side wall of the first sliding groove (33) and one side of the bottom of the horizontal plate (32); When the locking rod (36) is inserted into the inner side of the locking groove (35), the wire feeding wheel (21) and the rotating shaft (24) are in a connected state; when the locking rod (36) leaves the inner side of the locking groove (35), the wire feeding wheel (21) and the rotating shaft (24) are in a separated state; The outer side of the rotating shaft (24) is inserted into the inner side of the insertion groove (34), and the outer side of the connecting rod (31) movably penetrates the top of the inner wall of the first sliding groove (33).

8. The manufacturing process of a corrugated spring according to claim 7, characterized in that: The winding assembly (5) comprises five support rods (51), one side of the five support rods (51) being rotatably connected to a first guide wheel (52), a second guide wheel (53), a center wheel (54), a true circle compensation wheel (55) and a bending wheel (56) via bearings; The first guide wheel (52), the center wheel (54) and the true circle compensation wheel (55) are slidably connected to one side of the steel wire body (8), and the second guide wheel (53) and the bending wheel (56) are slidably connected to the other side of the steel wire body (8); The bottom of the support rod (51) is mounted on one side of the top of the base (1).

9. A manufacturing process for a corrugated spring according to claim 8, characterized in that: The corrugating assembly (6) comprises a support frame (61), a first cylinder (62) is mounted on one side of the support frame (61), a connecting block (63) is fixed to a push rod end of the first cylinder (62), and a corrugating knife (65) for corrugating the steel wire body (8) is mounted on one side of the connecting block (63); A baffle (64) located on one side of the steel wire body (8) is fixed on one side of the top of the support platform (10); The cutter assembly (7) comprises a first support plate (72), a stepper motor (71) is mounted on one side of the first support plate (72), a flange (73) is mounted on the output shaft end of the stepper motor (71), a second support plate (78) is fixed on one side of the flange (73), and a connecting column (74) is fixed on one side of the second support plate (78); A second cylinder (75) is fixed to one side of the connecting column (74), and a cutter (76) located on one side of the steel wire body (8) is fixed to a push rod end of the second cylinder (75); A connecting plate (79) is fixed on the outer side of the second supporting plate (78), and a cutting knife seat (77) is fixed on one side of the connecting plate (79); The cutter (76) and the cutter seat (77) are respectively located on two sides of the steel wire body (8), and the bottoms of the support frame (61) and the first support plate (72) are both fixed to the top of the base (1).

10. A manufacturing process for a corrugated spring according to claim 9, characterized in that: The flattening assembly (9) comprises two fixing frames (91), one side of the fixing frame (91) is provided with a third sliding groove (94), and the inner side of the third sliding groove (94) is slidably connected to a placement frame (93); The bottom of the placement rack (93) is rotatably connected to a plurality of rollers (96) slidably connected to one side of the top of the steel wire body (8) via bearings; A limiting plate (95) is fixed to one side of the fixing frame (91), a bolt (92) threadedly connected to one side of the placement frame (93) is inserted into one side of the limiting plate (95), and the bottom of the fixing frame (91) is fixed to one side of the top of the pallet platform (10).

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