A wire pretreatment device for spring production

Abstract

This invention relates to the field of wire processing equipment technology, and more particularly to a wire pretreatment device for spring production. It includes a frame, on which straightening components, coarse grinding components, fine grinding components, traction components, and cutting components are sequentially and fixedly installed from the beginning to the end along the horizontal wire conveying direction. This invention uses the frame as the supporting base, integrating the straightening, coarse grinding, fine grinding, traction, and cutting components sequentially along the wire conveying direction. It integrates the traditionally dispersed multiple pretreatment processes into one unit, eliminating the need for manual wire transfer. The various structures work in sequence and operate continuously, achieving a one-time completion of the entire pretreatment process for wire straightening, rust removal, fine grinding, traction, and cutting. This solves the problems of dispersed layout and cumbersome transfer in traditional equipment, significantly simplifying the processing flow.

Description

Technical Field

[0001] This invention relates to the field of wire processing equipment technology, and in particular to a wire pretreatment equipment for spring production. Background Technology

[0002] A spring is a mechanical part that works by utilizing elasticity and is widely used in many fields such as machinery, automobiles, hardware, and aerospace. Wire is the core raw material for spring production. The straightness, surface finish, and dimensional accuracy of the wire directly determine the spring forming quality, elastic stability, and service life. Therefore, the raw wire must be pre-treated before it can be processed into springs.

[0003] Currently, in the spring manufacturing industry, the conventional wire pretreatment process includes basic steps such as wire straightening, surface rust removal and grinding, wire conveying and traction, and fixed-length cutting. Most traditional wire pretreatment equipment on the market has a simple structural design, possessing only a single processing function, such as a separate wire straightening machine, a separate rust removal and grinding machine, or a separate wire cutting machine, lacking an integrated, one-piece processing structure.

[0004] The existing pretreatment processing mode has the following technical problems: First, each processing equipment is set up independently. After the wire is straightened, it needs to be transferred manually or by transfer equipment to the rough grinding and rust removal equipment. After grinding, it is then transferred to the cutting equipment. The process is complicated and the transfer process is time-consuming and labor-intensive, which greatly reduces the efficiency of wire pretreatment processing. Second, multiple independent equipment are scattered, occupying a lot of space in the production workshop. The equipment layout is messy and the workshop space utilization rate is low. Third, the wire is prone to secondary bending and surface contamination during multiple transfers, which destroys the effect of the previous pretreatment processing and results in poor wire processing accuracy. Fourth, each piece of equipment is driven independently, which consumes a lot of energy and has poor equipment coordination, making it difficult to achieve continuous production line processing.

[0005] Therefore, in order to address the above-mentioned technical problems, it is urgent to design a wire pretreatment equipment for spring production that integrates straightening, rough grinding, fine grinding, traction, and cutting functions, so as to realize centralized and continuous wire pretreatment, simplify the processing flow, reduce the space occupied, and improve the processing accuracy and efficiency of wire. Summary of the Invention

[0006] The purpose of this invention is to solve the problems existing in the prior art by proposing a wire pretreatment device for spring production.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A wire pretreatment device for spring production includes a frame, on which are arranged sequentially at intervals: A straightening assembly, located at the front end of the frame, is used for wire straightening. The coarse grinding component, located after the straightening component, is used for rough grinding and rust removal of the wire surface after straightening. The fine grinding assembly, located after the straightening assembly, is used to further process the surface of the wire after coarse grinding; The traction assembly, located after the fine grinding assembly, is used to pull the wire for conveying. The cutting assembly, located at the rear of the frame, is used for cutting wires after pretreatment.

[0008] Preferably, it also includes a wire drawing assembly, disposed between the fine grinding assembly and the traction assembly, for wire stretching processing.

[0009] Preferably, the straightening component includes a guiding structure and a straightening structure; The guiding structure includes a guide bucket located at the front end of the frame, and the guide bucket is funnel-shaped: the insertion end is large and the extension end is small; The straightening structure includes a vertical frame and a straightening frame. The vertical frame is equipped with four sets of pre-compression rollers arranged in a grid pattern for the initial compression and straightening of the wire. The straightening frame is equipped with two sets of straightening wheels that rotate relative to each other at vertical intervals. Both sets of straightening wheels have annular straightening grooves on their outer edges. The two sets of straightening grooves clamp the wire together to straighten it.

[0010] Preferably, the coarse grinding assembly includes a coarse grinding shaft rotatably mounted on a frame, a coarse grinding hole for the wire to pass through at the shaft center, multiple sets of coarse grinding rings axially spaced inside the coarse grinding shaft, multiple grinding rods radially slidably mounted on the inner ring of the coarse grinding rings, an elastic element between the grinding rods and the coarse grinding rings, and an arc-shaped coarse grinding tile abutting against the surface of the wire at the end of the grinding rod; a material leakage hole is provided on the side of each coarse grinding ring on the coarse grinding shaft.

[0011] Preferably, the fine grinding assembly includes a rotating drum rotatably mounted on a frame, with multiple rows of radially distributed mounting cylinders evenly distributed on the inner wall of the drum opening. The lower end of each mounting cylinder is open and slidably mounted with an extrusion rod, and an elastic element is provided between the extrusion rod and the mounting cylinder. The ends of multiple extrusion rods in each row are rotatably mounted with a fine grinding shaft, and a grinding wheel is provided on the fine grinding shaft at the end of each extrusion rod. One end of the fine grinding shaft extends out of the rotating drum and is provided with a fine grinding gear. A fine grinding gear ring is mounted on the frame at the side of the opening end of the rotating drum, and multiple fine grinding gears mesh with the fine grinding gear ring.

[0012] Preferably, the traction assembly includes a traction frame mounted on a frame, with two sets of traction wheels vertically spaced apart on the traction frame. Each set of traction wheels has an annular traction groove on its outer edge surface, and the two sets of traction grooves together clamp the wire to transport the wire.

[0013] Preferably, the cutting assembly includes a cutting frame disposed at the tail end of the frame, an eccentric wheel rotatably mounted on the cutting frame, a rocker arm fitted on the eccentric wheel, a slider rotatably mounted at the end of the rocker arm, the slider being horizontally slidably mounted on the cutting frame, and a cutting scissor being provided on the slider; the cutting frame is provided with a cutting hole for the wire to pass through within the horizontal travel range of the rocker arm.

[0014] Preferably, the wire drawing die assembly includes a drawing shaft rotatably mounted on a frame, drawing dies spaced axially on the drawing shaft, and a through hole at the end of the drawing die on the drawing shaft.

[0015] Preferably, the drawing shaft is provided with a plurality of supports in a circular array at one end facing the fine grinding assembly. Each support is movably mounted with a mounting shaft. Each mounting shaft is fitted with a hollow rolling roller that is rotatably mounted on the support. Multiple eccentric parts are provided at intervals inside the rolling roller on the mounting shaft. A drawing gear is provided at the end of the mounting shaft. A drawing gear ring is mounted on the frame. The plurality of drawing gears mesh with the drawing gear ring.

[0016] Preferably, the wire drawing die assembly is mounted on the frame in a height-adjustable manner.

[0017] Compared with the prior art, the present invention provides a wire pretreatment device for spring production, which has the following advantages: 1. This invention uses a frame as the supporting base and integrates a straightening component, a rough grinding component, a fine grinding component, a traction component, and a cutting component in sequence along the wire conveying direction. It integrates the traditionally scattered pre-treatment processes into one, eliminating the need for manual wire transfer. The various structures cooperate sequentially and operate continuously. From the structural cooperation relationship, the wire can complete the entire pre-treatment process of straightening, rust removal, fine grinding, traction, and cutting in one go. This solves the problems of scattered layout and cumbersome transfer of traditional equipment and greatly simplifies the processing flow.

[0018] 2. This invention removes oxide scale and thick rust from the surface of the wire using a coarse grinding component, and then uses a fine grinding component to perform fine polishing on the coarsely ground wire. The two-stage grinding structure works together with an elastic clamping structure to ensure thorough grinding without dead angles, avoiding the problems of incomplete grinding and severe scratches on the wire surface caused by a single grinding method, thus improving the smoothness of the wire.

[0019] 3. In the straightening process of this invention, the wire first passes through a trumpet-shaped guide bucket for correction and limiting, and then enters the straightening assembly after small-amplitude straightening. Initial straightening is achieved first by the grid-shaped pre-pressure rollers in the straightening assembly, and then the wire is further precisely straightened a second time by the rotation and clamping of two sets of straightening wheels.

[0020] 4. During coarse grinding, the coarse grinding pads adaptively conform to the wire, and the thick oxide scale and rust on the wire surface are removed by a combination of rotation and the rightward movement of the wire itself. Furthermore, since the coarse grinding pads rotate around the circumference of the wire, the wire surface is in all-round contact with the cooperation of multiple sets of coarse grinding pads, thereby eliminating grinding dead angles and ensuring the effective implementation of the initial coarse grinding process of the wire.

[0021] 5. In this invention, the rotating drum drives four rows of extrusion rods and grinding wheels to revolve around the wire. At the same time, under the meshing cooperation of the fine grinding gear and the fine grinding gear ring, the grinding wheels rotate, forming a planetary grinding state. The revolving and rotating grinding wheels perform all-round fine grinding on the surface of the wire, removing scratches and burrs left by coarse grinding, and improving the polishing smoothness. The elastic extrusion structure buffers the grinding force, avoids excessive wear on the wire, and makes the wire surface smooth and flat, meeting the high precision requirements of spring production.

[0022] 6. This invention adds a liftable wire drawing die assembly, which allows for selective activation of the drawing process according to spring production needs. When drawing is not required, the die lowers to allow for repositioning, without affecting the conventional pre-treatment of the wire. Simultaneously, a front-mounted planetary rolling structure is incorporated. When the eccentric component faces away from the wire, the rolling roller operates in static pressure mode; when the eccentric component faces the wire, it applies a force to the rolling roller, which in turn acts on the wire surface. This planetary rolling structure provides omnidirectional extrusion of the wire, and the eccentric component dynamically releases the extrusion stress, resulting in better pre-extrusion. Pre-treatment and shaping before drawing reduces the probability of drawing breakage and improves the finished product yield.

[0023] Other advantages, objectives and features of the invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be learned from practice of the invention. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the entire invention. Figure 1 .

[0025] Figure 2 This is a three-dimensional schematic diagram of the entire invention. Figure 2 .

[0026] Figure 3 This is a three-dimensional schematic diagram of the entire invention. Figure 3 .

[0027] Figure 4 This is a frontal view of the present invention.

[0028] Figure 5 This is a top view schematic diagram of the present invention.

[0029] Figure 6 For the present invention Figure 5 Schematic diagram of the cross section at point AA.

[0030] Figure 7 For the present invention Figure 1 A three-dimensional schematic diagram of the straightening components.

[0031] Figure 8 For the present invention Figure 6 A cross-sectional schematic diagram of the straightening component.

[0032] Figure 9 For the present invention Figure 1 A three-dimensional schematic diagram of the coarse grinding component.

[0033] Figure 10 For the present invention Figure 6 A cross-sectional schematic diagram of the rough grinding component.

[0034] Figure 11 For the present invention Figure 10 Schematic diagram of the cross section at point BB.

[0035] Figure 12 For the present invention Figure 2 A three-dimensional schematic diagram of the fine grinding component.

[0036] Figure 13 For the present invention Figure 6 A cross-sectional schematic diagram of the fine grinding component.

[0037] Figure 14 For the present invention Figure 13 Schematic diagram of the cross section at point CC.

[0038] Figure 15 For the present invention Figure 1 A three-dimensional schematic diagram of the wire drawing and drafting components.

[0039] Figure 16 For the present invention Figure 6 A cross-sectional schematic diagram of the wire drawing and drafting assembly.

[0040] Figure 17 For the present invention Figure 16 A partial schematic diagram of point D in the middle.

[0041] Figure 18 For the present invention Figure 17 Schematic diagram of the cross section at EE.

[0042] Figure 19 This is a three-dimensional schematic diagram of the grinding wheel layout in the fine grinding assembly of the present invention.

[0043] Figure 20 This is a three-dimensional schematic diagram of the planetary rolling structure of the present invention.

[0044] Figure 21This is a schematic diagram of the arrangement of a single set of drawing gears, eccentric components, and mounting shafts in the planetary rolling structure of the present invention.

[0045] Figure 22 For the present invention Figure 2 A three-dimensional schematic diagram of the traction component and the cutting component.

[0046] Figure 23 This is a cross-sectional schematic diagram of the eccentric wheel structure of the cutting component of the present invention.

[0047] In the diagram: 1. Frame; 2. Straightening assembly; 3. Coarse grinding assembly; 4. Fine grinding assembly; 5. Wire drawing and die forming assembly; 6. Planetary rolling structure; 7. Traction assembly; 8. Cutting assembly; 9. Wire; 21. Guide bucket; 22. Stand; 23. Pre-compression roller; 24. Straightening frame; 25. Straightening wheel; 26. Straightening sleeve; 31. Coarse grinding shaft; 32. Coarse grinding ring; 33. Grinding rod; 34. Coarse grinding tile; 35. Material discharge hole; 41. Rotary drum; 42. 43. Mounting cylinder; 44. Fine grinding shaft; 45. Extrusion rod; 46. Grinding wheel; 47. Fine grinding gear; 58. Fine grinding gear ring; 59. Pulling shaft; 50. Pulling die; 61. Support; 62. Mounting shaft; 63. Rolling roller; 64. Wheel rim; 65. Eccentric component; 66. Pulling gear; 67. Pulling gear ring; 71. Traction frame; 72. Traction wheel; 81. Cutting frame; 82. Eccentric wheel; 83. Rocker arm; 84. Slider; 85. Cutting shears. Detailed Implementation

[0048] The following will refer to the appendices in the embodiments of the present invention. Figure 1-23 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0049] Example 1: To address the technical problems of existing spring wire 9 pretreatment equipment having single function, scattered processes, cumbersome wire 9 transfer, large equipment space occupation, and discontinuous processing, an integrated wire pretreatment equipment for spring production is designed. Through an integrated frame 1, multi-process components are integrated to achieve continuous pretreatment.

[0050] The core load-bearing structure of this equipment is the frame 1, which is welded from carbon steel square tubing and has a long, horizontal structure. Fixed support feet are welded to the bottom of the frame 1 to ensure the stability of the equipment. (See attached diagram.) Figure 1 As shown, along the horizontal conveying direction of wire 9, straightening component 2, coarse grinding component 3, fine grinding component 4, traction component 7, and cutting component 8 are fixedly installed on the frame 1 from the beginning to the end in sequence. A conveying gap of 5-10cm is reserved between each component to avoid processing interference.

[0051] The straightening assembly 2 is bolted to the feed position at the beginning of the frame 1, responsible for straightening the originally bent wire 9 (the wire 9 is coiled and stored on a take-up coil). The coarse grinding assembly 3 is also bolted to the rear of the straightening assembly 2, removing thick rust and oxide scale from the surface of the wire 9. The fine grinding assembly 4 is bolted to the rear of the coarse grinding assembly 3, further grinding the coarsely ground wire 9. The traction assembly 7 is also bolted to the rear of the fine grinding assembly 4, providing traction for conveying the wire 9. The cutting assembly 8 is bolted to the discharge position at the very end of the frame 1, used to cut the pre-treated wire 9 to a fixed length; whether or not to cut depends on the actual situation, the cutting assembly 8 operates when cutting is needed and shuts down when not needed.

[0052] In this embodiment, two drive motors are provided, namely drive motor No. 1 and drive motor No. 2; drive motor No. 1 is a shared drive source for straightening and traction, and drive motor No. 2 drives the rough grinding component 3 separately.

[0053] According to the above technical solution, when using it: This embodiment constructs an integrated basic steel structure. During use, the original wound wire 9 is manually fed from the first end of the frame 1 into the straightening component 2. After being straightened by the straightening component 2, the wire 9 sequentially enters the coarse grinding component 3 and the fine grinding component 4 to complete surface rust removal and polishing. The polished wire 9 is then pulled backward at a uniform speed by the traction component 7, and finally enters the cutting component 8, where it is automatically cut to the set production length. The cut finished wire 9 is then collected. This integrates the five pre-processing steps, eliminating the need for multiple devices to transfer the wire 9, and ensuring smooth process connections. The components are arranged in a straight line, resulting in a compact structure and significantly reducing space occupation. The welded basic frame 1 has high structural strength and good load-bearing stability, providing structural protection for the stable operation of subsequent components and improving the continuity of wire 9 pre-processing from the perspective of overall structural coordination.

[0054] Example 2 addresses the technical problems of traditional wire straightening structures being simple, only capable of unidirectional straightening, resulting in incomplete bending correction and easy feed deviation of the wire 9. This example optimizes the structure of the straightening component 2 by adding a guide structure and a multi-stage straightening structure to improve straightening accuracy. The straightening component 2 consists of a guide structure and a straightening structure.

[0055] See attached document Figure 7 As shown, the main structure of the guiding structure is the guide bucket 21. A collar is detachably installed on the outside of the guide bucket 21 by screws. The collar is welded and fixed on a bracket, which is locked and fixed to the leftmost end of the frame 1 by bolts. The guide bucket 21 is a funnel-shaped structure integrally cast. The diameter of the insertion end is large and the diameter of the extension end is small, so as to guide the inserted wire 9 in a directional manner and perform preliminary bending: the spiral wire 9 that has just been unwound from the take-up coil is first limited to shrinkage, so that the bending range is reduced.

[0056] See attached document Figure 7 , 8 As shown, the straightening structure includes a vertical frame 22 and a straightening frame 24. Both the vertical frame 22 and the straightening frame 24 are welded from carbon steel plates and fixed to the frame 1 with expansion bolts. The main body of the vertical frame 22 has a U-shaped frame structure, with eight sets of mounting seats welded and fixed inside. The eight sets of mounting seats are paired up, and each pair of mounting seats has a set of pre-compression rollers 23 mounted on it via bearings. There are a total of four sets of pre-compression rollers 23, which are arranged in a grid pattern with two sets horizontally spaced and two sets vertically spaced. The grid-shaped pre-compression rollers 23 compress the wire 9 from four directions, causing the shrunken wire 9 to further shrink and tend towards a straightened state.

[0057] Two sets of straightening rollers 25 are vertically symmetrically arranged on the straightening frame 24. The straightening rollers 25 are rotatably connected to the straightening frame 24 via a rotating shaft. The outer edge of the straightening rollers 25 is integrally machined with an annular straightening groove. The two sets of straightening grooves clamp the wire 9 together, causing the wire 9, which tends to be straightened, to be squeezed and shaped into a straight state. In this embodiment, multiple sets of straightening frames 24 arranged in series can be configured with straightening rollers 25 for multi-stage rolling and shaping, or they can be used in conjunction with light rollers arranged at intervals to roll and shape, thereby improving the straightening effect.

[0058] According to the above technical solution, when using it: The raw wire 9 is inserted into the large-diameter end of the trumpet-shaped guide bucket 21 and exited from the small-diameter end, completing the limit correction to avoid feeding deviation and restricting the swaying of the wire 9 during straightening; at the same time, it also initially gathers the large curvature of the wire 9 that has just been unwound from the take-up coil into a wire 9 with a smaller curvature. Then the wire 9 enters the upright frame 22, where the grid-shaped pre-compression rollers 23 squeeze the wire 9 from four directions, further gathering the curvature of the wire 9 and completing the initial straightening. Subsequently, the wire 9 enters the straightening frame 24, where the straightening grooves of the upper and lower sets of straightening rollers 25 clamp the wire 9, performing a second precise straightening of the wire 9; at the same time, the synchronously rotating straightening rollers 25 can also drive the wire 9 to the right as an auxiliary power drive. Setting multiple sets of straightening rollers 25 in coordination can further eliminate the fine bends of the wire 9; in the attached Figure 8 As can be seen, straightening sleeves 26 are provided on both the front and rear sides of the straightening wheel 25 on the straightening frame 24. Before straightening, the wire 9 passes through the straightening sleeve 26 for axial positioning, which can achieve pre-straightening with secondary precision straightening. It can also reduce the random swinging of the wire 9 at the insertion port of the straightening groove due to toughness deformation (because the end face of the straightening wheel 25 is in contact, the wire 9 will not derail), which would cause the surface of the wire 9 to be damaged at this position, affecting the overall performance.

[0059] The straightening component 2 in this scheme first guides the feed and prevents deviation through the trumpet-shaped guide bucket 21, then completes the initial straightening through the grid-shaped pre-pressure roller 23, and then uses the multi-stage straightening wheel 25 for precise shaping. The triple straightening structure works together to eliminate the lateral and longitudinal bending of the wire 9.

[0060] In Example 3, traditional mechanical grinding typically involves arranging multiple grinding wheels 45 around the circumference of the wire 9 to simultaneously perform frictional rust removal on the surface of the wire 9; however, this arrangement easily creates grinding dead zones. Alternatively, a friction element with a collar structure can be fitted onto the wire 9, generating relative movement during the wire 9's transport and movement, thus producing a frictional rust removal effect; however, this arrangement results in excessive effective relative movement, making it difficult to effectively remove rust. Therefore, to solve the technical problems of numerous grinding dead zones in traditional coarse grinding structures, the easy damage to the wire 9 substrate caused by rigid grinding, and the difficulty in cleaning rust residue, an elastic adaptive coarse grinding component 3 is designed to adapt to the rust removal process on the surface of the wire 9.

[0061] See attached document Figure 1 , 9 As shown, the coarse grinding assembly 3 includes a coarse grinding shaft 31, which is rotatably mounted on the frame 1 via a bearing seat, which is fixed with bolts. A second drive motor is fixedly connected to the left end of the coarse grinding shaft 31 via a coupling, driving the shaft to rotate at high speed. The independent motor can provide high torque to meet the high-resistance processing requirements of coarse grinding for rust removal. A coarse grinding hole is drilled through the shaft of the coarse grinding shaft 31, allowing the wire 9 to pass freely. Four sets of coarse grinding rings 32 are axially and equidistantly welded and fixed inside the coarse grinding shaft 31, as shown in the attached diagram. Figure 11 As shown, the inner ring of the coarse grinding ring 32 has multiple radial sliding grooves evenly distributed. A grinding rod 33 is slidably installed in the sliding groove. An elastic element is provided between the grinding rod 33 and the sliding groove. The elastic element is a compression spring. The elastic element causes the end of the grinding rod 33 to move towards the wire 9. The end of the grinding rod 33 is integrally formed with an arc-shaped coarse grinding tile 34. The surface of the coarse grinding tile 34 is provided with a friction surface made of diamond wear-resistant material. A rectangular material leakage hole 35 is provided on the side wall of the coarse grinding shaft 31 corresponding to the position of each set of coarse grinding rings 32. The material leakage hole 35 connects the inner cavity of the shaft with the external environment.

[0062] According to the above technical solution, when using it: The straightened wire 9 passes through the coarse grinding hole in the center of the coarse grinding shaft 31 and sequentially through multiple sets of coarse grinding pads 34. An elastic element pushes the grinding rod 33 to slide towards one side of the wire 9, causing the arc-shaped coarse grinding pads 34 to tightly adhere to the outer surface of the wire 9. The coarse grinding pads 34, rotating synchronously with the coarse grinding shaft 31, contact the surface of the wire 9. Through a combination of rotation and the rightward movement of the wire 9 itself, the thick oxide scale and rust on the surface of the wire 9 are ground away. Furthermore, since the coarse grinding pads 34 rotate circumferentially around the wire 9, the cooperation of multiple sets of coarse grinding pads 34 ensures all-around contact with the surface of the wire 9, eliminating grinding dead angles and ensuring the effective initial coarse grinding process of the wire 9. Rust and debris generated during grinding are ejected from the discharge hole 35, achieving automatic slag removal. The discharge hole 35 discharges waste slag in real time, preventing waste slag accumulation and wear on the wire 9, ensuring the cleanliness of the coarse grinding process, and preventing damage to the metal substrate of the wire 9.

[0063] Example 4: Traditional coarse and fine grinding processes mostly differ only in the precision of the friction surface settings. However, in this design, if only this is done, the fine grinding component 4 would struggle to effectively handle the subsequent processing of the coarse grinding process while maintaining a compact overall equipment layout. The fine grinding time or path would be shortened due to the compact structure, resulting in a poorer grinding effect. Therefore, to address this problem, this example specifically designs a planetary fine grinding component 4 to perform refined polishing on the wire 9.

[0064] See attached document Figure 2 , 12 As shown in Figures 13, 14, and 19, the fine grinding assembly 4 includes a rotating drum 41, which is rotatably mounted on the frame 1 via bearings. Four rows of mounting cylinders 42 are evenly distributed along the radial direction of the inner wall of the rotating drum 41, and are welded and fixed to the inner wall of the rotating drum 41. An extrusion rod 44 is provided inside the mounting cylinder 42, slidingly connected and fitted within it. An elastic element, a compression spring, is provided between the extrusion rod 44 and the mounting cylinder 42, causing the end of the extrusion rod 44 to tend towards the wire 9. The lower ends of each row of extrusion rods 44 are hinged to a fine grinding shaft 43, and a grinding wheel 45 is nested and fixed on the fine grinding shaft 43. The right end of the fine grinding shaft 43 extends out of the rotating cylinder 41, and a fine grinding gear 46 is installed synchronously on the right end of the fine grinding shaft 43 via a key connection. A bracket is fixedly installed on the right side of the rotating cylinder 41 on the frame 1 by bolts. The upper end of the bracket is provided with a mounting hole, and a fine grinding gear ring 47 is embedded and fixedly installed in the mounting hole. The gear ring meshes with the fine grinding gear 46.

[0065] According to the above technical solution, when using it: After rough grinding, the wire 9 enters from the left end of the rotating drum 41 and then passes through several grinding wheels 45 in sequence. The elastic element pushes the extrusion rod 44 downward, so that the grinding wheel 45 fits tightly against the surface of the wire 9 (the gap between the extrusion rod 44 and the installation cylinder 42 is no more than 3mm. This gap is only to allow room for the wire 9 to pass through, not to lock it so that the wire 9 cannot pass through). The rotating drum 41 drives the four rows of extrusion rods 44 and grinding wheels 45 to revolve around the wire 9. At the same time, with the meshing of the fine grinding gear 46 and the fine grinding gear ring 47, the grinding wheel 45 rotates, forming a planetary grinding state. The revolving and rotating grinding wheel 45 performs all-round fine polishing on the surface of the wire 9, removing scratches and burrs left by rough grinding and improving the polishing smoothness. The elastic extrusion structure buffers the grinding force to avoid excessive wear on the wire 9, making the surface of the wire 9 smooth and flat, meeting the high precision requirements of spring production.

[0066] In this embodiment, a gear transmission linkage is adopted. The right end of the coarse grinding shaft 31 is fixedly connected to the driving gear, which meshes with a transition gear one rotatably mounted on the frame 1. A transition gear two is coaxially arranged with the transition gear. The left end of the rotating drum 41 is fixedly connected to the driven gear, and the transition gear two meshes with the driven gear. The gear transmission is mainly used to save the space occupied by a drive motor (of course, a separate motor can also be selected for driving). This gear transmission is an acceleration transmission with a transmission ratio of 1:2, which makes the revolution and rotation speed of the grinding wheel 45 faster, thereby improving the grinding effectiveness.

[0067] In this embodiment, two sets of collection boxes with counterweight-operated, openable covers can be installed on the frame 1, corresponding to the coarse grinding assembly 3 and the fine grinding assembly 4 respectively (only the collection box is shown at the coarse grinding assembly 3 in the attached figure). The coarse grinding shaft 31 passes through the collection box, and all coarse grinding rings 32 are located inside the collection box, used to collect the debris generated by coarse grinding. The rotating drum 41 is located inside the collection box, used to collect the debris generated by fine grinding. The collection box is provided with a through hole for the wire 9 to pass through.

[0068] Example 5: This example designs a clamping traction component 7 to achieve uniform and stable feeding.

[0069] See attached document Figure 22 As shown, the traction assembly 7 includes a traction frame 71, which is welded from steel plates and fixed to the frame 1 with bolts. Two sets of traction wheels 72 are vertically and parallelly arranged on the traction frame 71, and the traction wheels 72 are rotatably connected to the traction frame 71 through bearings. The outer edge of the traction wheel 72 is integrally formed with a semi-circular traction groove, and the upper and lower traction grooves cooperate to form a circular clamping channel to match the shape of the wire 9. The polished wire 9 is inserted into the traction groove between the upper and lower traction wheels 72, and the two sets of traction wheels 72 rotate synchronously relative to each other, clamping the wire 9 by the friction of the groove and pulling it to the right at a uniform speed. By adjusting the distance between the traction wheels 72, it can accommodate wires 9 of different diameters and prevent the wire 9 from slipping or shifting during transportation.

[0070] See attached document Figure 3 As shown, gears are installed on the rotating shafts of the two sets of straightening rollers 25 and the two sets of traction rollers 72, and these gears mesh in pairs. The output shaft of the first drive motor is equipped with a driving wheel, while the end of the rotating shaft of the lower straightening roller 25 is equipped with a driven wheel one, and the lower traction roller 72 has a driven wheel two. A synchronous belt is fitted between the driving wheel and driven wheels one and two. The first drive motor enables linkage drive. During the rotation of the straightening roller 25, the chain drives the traction roller 72 to rotate synchronously, eliminating the need for a separate motor. This ensures that the feeding speed matches the straightening speed, and the synchronous linkage transmission ensures uniform and stable feeding, matching the processing rhythm of the front end. Furthermore, a tensioning wheel bracket is welded to the frame 1, and a tensioning wheel is rotatably mounted on the bracket. The tensioning wheel presses against the synchronous belt, achieving synchronous transmission and ensuring stable rotation of the straightening roller 25.

[0071] Example 6: This example designs an eccentric wheel 82 mechanical automatic cutting assembly 8.

[0072] See attached document Figure 22 As shown, the cutting assembly 8 includes a cutting frame 81, which is bolted to the tail end of the frame 1. An eccentric wheel 82 is rotatably mounted on the top of the cutting frame 81 via a rotating shaft, which is externally connected to a speed-regulating motor. A rocker arm 83 is mounted on the eccentric wheel 82. A horizontal sliding groove is formed on the cutting frame 81 at the axis of the wire 9, and the sliding groove is perpendicular to the wire 9. A slider 84 is slidably mounted in the sliding groove, and the slider 84 is rotatably connected to the end of the rocker arm 83. A cutting shear 85, made of high-hardness alloy material, is bolted to the slider 84. A circular cutting hole is formed on the cutting frame 81 corresponding to the position of the cutting shear 85, through which the wire 9 is fed.

[0073] In use, the wire 9 is conveyed by the traction component 7 and passes through the cutting hole. If the wire 9 needs to be cut, the conveying speed of the traction component 7 and the rotation frequency of the speed-regulating motor are adjusted according to the production setting of the cutting length. The speed-regulating motor drives the eccentric wheel 82 to rotate. The rotation of the eccentric wheel 82 drives the slider 84 to make horizontal reciprocating linear motion through the rocker arm 83, which in turn drives the cutting scissors 85 to intermittently and quickly cut the wire 9 to complete the fixed-length cutting operation.

[0074] The crank-slider 84 transmission structure operates stably, with low cutting impact and smooth, burr-free cuts on the wire 9; automated intermittent cutting eliminates the need for manual intervention, reducing labor intensity; the cutting length can be precisely controlled by adjusting the motor speed and configuring a detection structure on the frame 1 (to detect the extension length of the wire 9), adapting to the cutting needs of various specifications of spring wire 9.

[0075] In Example 7, some spring wires 9 undergo pretreatment and will also undergo wire drawing and die-drawing processes. Therefore, this solution can add a multi-position wire drawing and die-drawing assembly 5 between the fine grinding assembly 4 and the traction assembly 7.

[0076] See attached document Figure 15 , 16 As shown, the wire drawing die assembly 5 includes a drawing shaft 51, which is rotatably mounted on the frame 1 via a bearing housing. A drive motor is mounted on the frame 1 and connected to the drawing shaft 51 via a synchronous belt structure. Four sets of drawing dies, made of cemented carbide, are equidistantly embedded inside the drawing shaft 51 along its axial direction. A circular through-hole is coaxially formed at the end of the drawing shaft 51, with a diameter larger than that of the largest drawing die.

[0077] During use, the wire 9 passes through four sets of drawing dies with decreasing hole diameters in sequence (the diameter difference of the 52 holes in each drawing die does not exceed 1mm), gradually completing the stretching and refining. The multi-stage variable diameter drawing dies achieve gradient stretching, avoiding excessive deformation in a single stretch that could cause the wire 9 to break. The drawing shaft 51 rotates slowly, driving the wire 9 to rotate evenly, avoiding unilateral stretching deformation, ensuring uniform circumferential shaping of the wire 9, and high dimensional accuracy. The processed wire 9 is then exited through the end hole and enters the traction assembly 7.

[0078] In this embodiment, wire drawing is a continuous and stable process. Since drawing is a cold process, intense friction occurs between the drawing die 52 and the wire 9. Therefore, a lubrication system must be installed before the drawing die assembly 5 to reduce wear and improve production efficiency. This solution involves installing a lubrication box on the frame 1, with the drawing shaft 51 passing through the lubrication box and the penetration area sealed to prevent leakage. The drawing die 52 is entirely immersed in a lubricant containing nanoparticles, allowing for uniform coating of lubricant before wire 9 drawing. This reduces frictional resistance between the wire 9 and the drawing die, minimizes scratches and wear on the wire 9 surface, reduces die wear, and aids in heat dissipation between the drawing die 52 and the wire 9. An annular wiping pad covering the wire 9 is provided on the outer wall of the lubrication box at the protruding end of the wire 9 to remove any obvious residual lubricant. A receiving hopper is located below the wiping pad on the outer wall of the lubrication box to collect condensed lubricant. The lubrication box can be additionally equipped with a filter for impurity filtration; alternatively, the lubricant can be replaced periodically. In this embodiment, wire 9 does not necessarily require drawing and die-casting. When the drawing and die-casting process is not performed, the drawing and die-casting assembly 5 will obstruct the feeding of wire 9. In this case, the drawing and die-casting assembly 5 needs to be moved. Since the equipment and frame 1 are arranged in a long rectangular shape with a small width, they can be vertically raised and lowered to fit the actual production layout. That is, a rectangular slide rail is started on the frame 1, and vertical slide rails are set on the four corners of the slide rail. A lifting platform is installed on the four sets of slide rails, so that the lifting platform can move vertically on the frame 1. At this time, the entire drawing and die-casting assembly 5 is set on the lifting platform, and the motor corresponding to the drawing shaft 51 is also set on the lifting platform. The lifting platform is driven by a hydraulic device to achieve stable raising and lowering (the hydraulic device is not shown in the attached drawing).

[0079] When wire 9 needs to be stretched and refined, the lifting platform is controlled to raise the wire drawing and die assembly 5 to the wire 9 conveying height; when no drawing is required, the lifting platform is controlled to lower the wire drawing and die assembly 5 along the slide rail, disengaging it from the wire 9 conveying path to make way for the wire 9, without affecting the regular grinding and cutting processes. The equipment's processing flexibility is greatly improved, taking into account both routine pretreatment and refined drawing processing.

[0080] In Example 8, when drawing wire 9, it is usually pulled through the drawing die 52, resulting in high resistance and uneven surface stress distribution and localized deformation during the drawing process. Therefore, this example adds a planetary rolling structure 6 to optimize the forming quality of wire 9.

[0081] See attached document Figure 16 , 17 As shown in Figures 18, 20, and 21, four sets of supports 61 are welded in a ring array at the feed end of the drawing shaft 51. Each support 61 has a movable hole. The rolling roller 63 has wheel rims 64 on both sides that insert into the movable holes. The wheel rims 64 are fitted with the movable holes with a clearance fit, allowing the rolling roller 63 to rotate relative to the supports 61 and also move slightly. A mounting shaft 62 is circumferentially mounted on the rolling roller 63, and the mounting shaft 62 is also rotatably mounted on the hubs on both sides of the rolling roller 63. Eccentric parts 65 are welded and fixed at intervals on the mounting shaft 62 within the rolling roller 63. The outer end of the mounting shaft 62 is keyed to a drawing gear 66. A mounting bracket is fixedly mounted on the frame 1 by bolts. The mounting bracket also has an annular drawing gear ring 67 embedded and fixedly mounted on it. The drawing gear 66 meshes with the drawing gear ring 67.

[0082] When the drawing shaft 51 rotates, the rotation of the drawing shaft 51 drives the support 61 to revolve around the wire 9, and the rolling roller 63 will revolve around the wire 9 to perform rolling treatment on the wire 9, so that the wire 9 is stressed in advance and the subsequent drawing pressure is reduced; at the same time, the outer edge surface of the wire 9 is corrected to a certain extent.

[0083] While the rolling roller 63 revolves around the wire 9, the drawing gear 66 rolls along the fixed drawing gear ring 67, thereby driving the mounting shaft 62 to rotate. This, in turn, drives the eccentric component 65 to rotate continuously, achieving a combined revolution and rotation motion to uniformly compress the wire 9 circumferentially. Furthermore, the transmission between the drawing gear 66 and the drawing gear ring 67 satisfies the condition that the rotational speed of the mounting shaft 62 is greater than the revolutional speed of the rolling roller 63. When the eccentric component 65 is away from the wire 9, the rolling roller 63 operates in static pressure mode; when the eccentric component 65 is towards the wire 9, it exerts a force on the rolling roller 63, which in turn acts on the surface of the wire 9. The planetary rolling structure 6 compresses the wire 9 from all directions, and the eccentric component 65 dynamically releases the compressive stress, resulting in better pre-compression. Pre-treatment and shaping before drawing reduces the probability of drawing breakage and improves the finished product qualification rate.

[0084] Overall machine operation process: First, determine whether to start the wire drawing and die-drawing process based on production needs: if no drawing is required, control the wire drawing and die-drawing assembly 5 to descend and make room via an electric push rod; if drawing is required, control the assembly to rise and align.

[0085] During processing, wire 9 first passes through the trumpet-shaped guide bucket 21 for correction and limiting, and then enters the straightening assembly 2 after slight straightening. It first undergoes initial straightening via the grid-shaped pre-pressing rollers 23 in the straightening assembly 2, and then is further precisely straightened a second time using two sets of straightening wheels 25 that rotate and clamp. The straightened wire 9 then enters the coarse grinding assembly 3, where the coarse grinding pads 34 adaptively adhere to the wire 9, removing thick rust and oxide scale from the surface. Waste is automatically discharged from the discharge hole 35. After coarse grinding, the wire 9 enters the fine grinding assembly 4, where planetary grinding wheels 45 finely polish the surface of the wire 9, removing scratches and burrs. The wire 9 is continuously conveyed to the cutting assembly 8, where a speed-regulating motor drives the eccentric wheel 82 to rotate, causing the rocker arm 83 to slide horizontally back and forth. The cutting shears 85 perform intermittent fixed-length cutting according to a set interval. The cut finished wire 9 is then neatly stored, completing all pre-processing steps.

[0086] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0088] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A wire pretreatment device for spring production, comprising a frame (1), characterized in that, The frame (1) is provided with the following at intervals: A straightening assembly (2) is set at the head end of the frame (1) and is used for straightening wire (9); The coarse grinding component (3) is set after the straightening component (2) and is used for coarse grinding and rust removal of the surface of the wire (9) after straightening; The fine grinding assembly (4) is located after the straightening assembly (2) and is used to further process the surface of the coarsely ground wire (9); The traction assembly (7) is located after the fine grinding assembly (4) and is used to pull the wire (9) for conveying. The cutting component (8) is set at the end of the frame (1) and is used for cutting the wire (9) after pretreatment.

2. The wire pretreatment equipment for spring production according to claim 1, characterized in that, It also includes a wire drawing assembly (5), which is located between the fine grinding assembly (4) and the traction assembly (7) for wire (9) stretching treatment.

3. The wire pretreatment equipment for spring production according to claim 1, characterized in that, The straightening component (2) includes a guiding structure and a straightening structure; The guiding structure includes a guide bucket (21) located at the head end of the frame (1). The guide bucket (21) is funnel-shaped with a large insertion end and a small extension end. The straightening structure includes a stand (22) and a straightening frame (24). The stand (22) is provided with four sets of pre-compression rollers (23) arranged in a grid pattern for the initial compression and straightening of the wire (9). The straightening frame (24) is provided with two sets of straightening wheels (25) that rotate relative to each other at vertical intervals. The outer edge of each set of straightening wheels (25) is provided with annular straightening grooves. The two sets of straightening grooves clamp the wire (9) together for straightening.

4. The wire pretreatment equipment for spring production according to claim 1, characterized in that, The coarse grinding assembly (3) includes a coarse grinding shaft (31) rotatably mounted on a frame (1). The coarse grinding shaft (31) has a coarse grinding hole at its center for the wire (9) to pass through. Multiple sets of coarse grinding rings (32) are axially spaced inside the coarse grinding shaft (31). Multiple grinding rods (33) are radially slidably mounted on the inner ring of the coarse grinding ring (32). An elastic element is provided between the grinding rod (33) and the coarse grinding ring (32). The end of the grinding rod (33) is provided with an arc-shaped coarse grinding tile (34) that abuts against the surface of the wire (9). A material leakage hole (35) is provided on the side of each coarse grinding ring (32) on the coarse grinding shaft (31).

5. The wire pretreatment equipment for spring production according to claim 1, characterized in that, The fine grinding assembly (4) includes a rotating cylinder (41) rotatably mounted on a frame (1). Multiple rows of radially distributed mounting cylinders (42) are evenly distributed on the inner wall of the opening of the rotating cylinder (41). The lower end of the mounting cylinder (42) is open and slidably mounted with a pressing rod (44). An elastic element is provided between the pressing rod (44) and the mounting cylinder (42). The ends of multiple pressing rods (44) in each row are rotatably mounted with a fine grinding shaft (43). A grinding wheel (45) is provided on the fine grinding shaft (43) at the end of each pressing rod (44). One end of the fine grinding shaft (43) extends out of the rotating cylinder (41) and is provided with a fine grinding gear (46). A fine grinding gear ring (47) is mounted on the side of the opening end of the rotating cylinder (41) on the frame (1). Multiple fine grinding gears (46) mesh with the fine grinding gear ring (47).

6. The wire pretreatment equipment for spring production according to claim 1, characterized in that, The traction assembly (7) includes a traction frame (71) mounted on a frame (1). Two sets of traction wheels (72) are vertically spaced on the traction frame (71). Both sets of traction wheels (72) have annular traction grooves on their outer edges. The two sets of traction grooves clamp the wire (9) together to transport the wire (9).

7. The wire pretreatment equipment for spring production according to claim 1, characterized in that, The cutting assembly (8) includes a cutting frame (81) located at the tail end of the frame (1), an eccentric wheel (82) is rotatably mounted on the cutting frame (81), a rocker arm (83) is mounted on the eccentric wheel (82), a slider (84) is rotatably mounted at the end of the rocker arm (83), the slider (84) is horizontally slidably mounted on the cutting frame (81), and a cutting scissor (85) is provided on the slider (84); the cutting frame (81) is provided with a cutting hole for the wire (9) to pass through within the horizontal travel range of the rocker arm (83).

8. The wire pretreatment equipment for spring production according to claim 2, characterized in that, The wire drawing die assembly (5) includes a drawing shaft (51) rotatably mounted on a frame (1), a drawing die (52) spaced axially on the drawing shaft (51), and a through hole at the end of the drawing die (52) on the drawing shaft (51).

9. The wire pretreatment equipment for spring production according to claim 8, characterized in that, The drawing shaft (51) facing the fine grinding assembly (4) has a ring array of multiple supports (61), each support (61) has a mounting shaft (62) movably mounted on it, each mounting shaft (62) has a hollow rolling roller (63) rotatably mounted on the support (61), and multiple eccentric parts (65) are spaced apart inside the rolling roller (63) on the mounting shaft (62); the end of the mounting shaft (62) is provided with a drawing gear (66), and a drawing gear ring (67) is mounted on the frame (1), and the multiple drawing gears (66) mesh with the drawing gear ring (67).

10. The wire pretreatment equipment for spring production according to claim 2, characterized in that, The wire drawing and die-casting assembly (5) can be installed in a height-adjustable manner on the frame (1).

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