Wire straightening device

Abstract

The present application relates to the technical field of wire straightening, and provides a wire straightening device, which comprises a straightening machine and a traction machine, the straightening machine comprises a fixed roller group and a movable roller group which are rotationally arranged on a straightening machine frame, the fixed roller group is composed of a plurality of fixed straightening rollers, the movable roller group is composed of a plurality of movable straightening rollers, and the fixed straightening rollers and the movable straightening rollers are arranged in a staggered manner along the wire conveying direction; each movable straightening roller is connected with an adjusting assembly for driving the movable straightening roller to approach or move away from one side of the fixed roller group, so as to apply pressure to the wire in a decreasing extrusion amount at the end of the wire conveying direction, and eliminate the residual stress of the wire. The present application not only ensures the overall straightness of the wire, but also greatly reduces the residual stress level after straightening, improves the long-term stability of the wire size, and effectively prevents the wire from rebounding, warping or twisting deformation in the later period.

Description

Technical Field

[0001] This invention relates to the field of wire straightening technology, and more specifically, to a wire straightening device. Background Technology

[0002] After being processed and formed, wire typically needs to be straightened by a straightening device to correct its straightness and roundness to meet subsequent usage requirements. A straightening device usually includes a frame and straightening rollers installed alternately on the frame. During straightening, the wire passes through each straightening roller in sequence, experiencing repeated reverse bending forces. When the stress exceeds the material's yield limit (after the elastic deformation stage), permanent plastic deformation occurs, gradually offsetting the original bending.

[0003] In some existing wire straightening devices, once the position of each straightening roller is installed and fixed, its pressure is also fixed. Although this straightening method can eliminate the original bending of the wire, there is often a large residual stress inside the straightened wire, which can easily cause subsequent wire deformation to be inaccurate and affect the service life of the product. Summary of the Invention

[0004] The purpose of this invention is to provide a wire straightening device to overcome the above-mentioned defects of the prior art.

[0005] This invention is achieved through the following technical solution: A wire straightening device includes a straightener and a traction machine. The straightener includes a fixed roller group and a movable roller group rotatably mounted on the straightener frame. The fixed roller group consists of several fixed straightening rollers, and the movable roller group consists of several movable straightening rollers. The fixed straightening rollers and movable straightening rollers are arranged alternately along the wire conveying direction. Each movable straightening roller is connected to an adjustment component that drives it to move closer to or further away from the fixed roller group, so as to apply pressure to the wire by gradually reducing the extrusion amount at the end of the wire conveying direction and eliminating residual stress in the wire.

[0006] Optionally, the adjustment assembly includes a slider and an adjustment screw. The straightening frame is provided with a slide groove, the slider is slidably engaged in the slide groove, the movable straightening roller is rotatably mounted on the slider, the adjustment screw is rotatably mounted in the slide groove, one end of the adjustment screw extends out of the slide groove and is provided with an adjustment handwheel, and the slider and the adjustment screw are engaged by a thread.

[0007] Optionally, the straightening frame is provided with a scale near the slider, and the slider is provided with a pointer pointing to the scale, so that the pointer indicates the corresponding measurement scale on the scale during the sliding of the slider.

[0008] Optionally, the straightening frame is provided with a horizontal straightening zone and a vertical straightening zone in sequence along the wire conveying direction. The fixed roller group and the movable roller group in the horizontal straightening zone are arranged in the front-to-back direction, and the fixed roller group and the movable roller group in the vertical straightening zone are arranged in the up-down direction.

[0009] Optionally, the straightening machine has at least one pair of symmetrically arranged infeed straightening rollers at the front end of the wire conveying direction and at least one pair of symmetrically arranged outfeed straightening rollers at the end of the wire conveying direction.

[0010] Optionally, one of the fixed straightening rollers is connected to a drive element for driving its rotation, and adjacent fixed straightening rollers are driven by gears.

[0011] Optionally, the traction machine includes two sets of upper and lower traction tracks mounted on the traction machine frame. The traction tracks are connected to a power unit that drives them to rotate. A line passage is formed between the two sets of traction tracks. Several upper pressure roller assemblies are provided at intervals along the straight section of the inner side of the upper traction track. Lower pressure roller assemblies are provided at positions corresponding to the upper pressure roller assemblies on the inner side of the lower traction track. The upper and lower pressure roller assemblies are connected to a driving unit to drive them to move closer or further apart, thereby clamping or releasing the two sets of traction tracks.

[0012] Optionally, the driving component includes an upper cylinder and a lower cylinder mounted on the traction frame, the upper cylinder being connected to the upper pressure roller assembly, and the lower cylinder being connected to the lower pressure roller assembly.

[0013] Optionally, the upper pressure roller assembly and the lower pressure roller assembly have the same structure, both including a transition rod, two support rods and several rollers. The two support rods are arranged side by side, and the several rollers are arranged at intervals and rotatably connected between the two support rods. The transition rod is fixedly connected between the two support rods.

[0014] Optionally, a pair of width-limiting rollers are arranged side by side at both the inlet and outlet ends of the line passage.

[0015] The technical solution of this invention has at least the following advantages and beneficial effects: In this invention, by independently setting an adjustment component for each movable straightening roller, the squeezing amount of each movable straightening roller can be gradually reduced at the end of the wire conveying direction, thereby forming a gradient straightening force field from strong to weak along the straightening path. During the straightening process, the front straightening roller repeatedly bends the wire in the opposite direction with a large amount of pressure, causing sufficient plastic deformation of the wire to effectively eliminate the original bending and initial roundness deviation; the rear straightening roller applies slight correction to the wire with a gradually decreasing amount of pressure. This decreasing pressure method can gradually reduce the difference in elastic recovery inside the wire, making the residual stress distribution along the cross-section tend to be uniform, and promoting the stable release of the plastic deformation that has been generated under low stress, avoiding the introduction of new internal stress concentration due to sudden unloading or over-correction. In this way, not only is the overall straightness of the wire guaranteed, but the residual stress level after straightening is also significantly reduced, improving the long-term stability of the wire dimensions and effectively preventing the wire from springback, warping, or twisting deformation in the later stage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a wire straightening device provided by the present invention; Figure 2 This is a schematic diagram of the straightening machine. Figure 3 This is a schematic diagram of the front structure of the vertical straightening zone; Figure 4 for Figure 3 Enlarged view of point A in the image; Figure 5 This is a schematic diagram of the back structure of the vertical straightening zone; Figure 6 This is a schematic diagram of the traction machine. Figure 7 This is a schematic diagram of the upper pressure roller assembly; Reference numerals: 100-Straightening machine, 110-Straightening machine frame, 111-Groove, 120-Fixed straightening roller, 130-Modible straightening roller, 140-Adjusting assembly, 141-Slider, 142-Adjusting screw, 143-Adjusting handwheel, 144-Scale, 145-Pointer, 150-Infeed straightening roller, 160-Outfeed straightening roller, 170-Transmission gear, 180-Transition gear, 200-Traction machine, 210-Traction machine frame, 220-Upper traction track, 230-Lower traction track, 240-Upper pressure roller assembly, 241-Roller, 242-Support rod, 243-Transfer rod, 250-Lower pressure roller assembly, 260-Upper cylinder, 270-Lower cylinder, 280-Width limiting roller, 300-Wire. Detailed Implementation

[0017] refer to Figure 1 A wire straightening device includes a straightening machine 100 and a traction machine 200.

[0018] refer to Figures 2-5 The straightening machine 100 includes a fixed roller group and a movable roller group rotatably mounted on the straightening machine frame 110. The fixed roller group consists of several fixed straightening rollers 120, and the movable roller group consists of several movable straightening rollers 130. The fixed straightening rollers 120 and the movable straightening rollers 130 are arranged alternately along the conveying direction of the wire 300. Each movable straightening roller 130 is connected to an adjustment component 140 that drives it to move closer to or away from the side of the fixed roller group.

[0019] In practical applications, the compression amount of each movable straightening roller 130 is progressively reduced at the end of the wire 300's conveying direction, thereby forming a gradient straightening force field from strong to weak along the straightening path. During the straightening process, the front straightening rollers repeatedly bend the wire 300 in the opposite direction with a larger compression amount, causing sufficient plastic deformation to effectively eliminate the original bending and initial roundness deviation. The rear straightening rollers then apply slight correction to the wire 300 with a gradually decreasing compression amount. This decreasing compression method can gradually reduce the elastic recovery difference inside the wire 300, making the residual stress distribution along the cross-section tend to be uniform, and promoting the stable release of the plastic deformation that has already occurred under low stress conditions, avoiding the introduction of new internal stress concentration due to sudden unloading or over-correction. In this way, not only is the overall straightness of the wire 300 guaranteed, but the residual stress level after straightening is also significantly reduced, improving the long-term dimensional stability of the wire 300 and effectively preventing the wire 300 from springback, warping, or twisting deformation in the later stages.

[0020] Furthermore, it is worth noting that the positions of all fixed straightening rollers 120 on the same side are fixed on the frame. During adjustment, only the position of the movable straightening roller 130 on the other side changes. This design ensures that the adjustment reference is consistent (the line connecting all the fixed straightening rollers 120 is equivalent to a fixed reference line), thereby ensuring the alignment of the wire 300.

[0021] In a preferred embodiment, the adjusting assembly 140 includes a slider 141 and an adjusting screw 142. A groove 111 is provided on the straightening frame 110, and the slider 141 is slidably fitted within the groove 111. It should be understood that the sliding direction of the slider 141 is perpendicular to the direction of the connection between the fixed straightening rollers 120. The groove 111 also restricts the rotation of the slider 141. The movable straightening roller 130 is rotatably mounted on the slider 141. When the wire 300 passes through, the movable straightening roller 130 rotates passively without requiring power. The adjusting screw 142 is rotatably mounted within the groove 111, with one end extending out of the groove 111 and equipped with an adjusting handwheel 143. The slider 141 and the adjusting screw 142 are connected by a threaded connection. In this way, by rotating the adjusting handwheel 143, the adjusting screw 142 can be rotated, thereby causing the slider 141 and the movable straightening roller 130 to move along the slide groove 111 as a whole, so that the movable straightening roller 130 moves closer to or away from the side of the fixed roller group, thereby achieving the purpose of adjusting the amount of extrusion on the wire 300.

[0022] Based on the above, in this embodiment, a scale 144 is provided on the straightening frame 110 near the slider 141, and a pointer 145 is provided on the slider 141 pointing to the scale 144. This allows the pointer 145 to indicate the corresponding measurement scale on the scale 144 during the sliding of the slider 141, making it easy for the operator to know the distance the slider 141 and the movable straightening roller 130 have moved as a whole, ensuring adjustment accuracy. In practical applications, both the scale 144 and the pointer 145 are designed as thin sheets. The scale 144 is fixed to the straightening frame 110 with screws, and the pointer 145 is fixed to the slider 141 with screws.

[0023] The straightening frame 110 is equipped with a horizontal straightening zone and a vertical straightening zone along the conveying direction of the wire 300. The fixed and movable roller groups in the horizontal straightening zone are arranged in the front-to-back direction, while the fixed and movable roller groups in the vertical straightening zone are arranged in the up-down direction. It is worth noting that the vertical straightening zone is responsible for correcting bends in the vertical direction, while the horizontal straightening zone is responsible for correcting bends in the horizontal direction. Together, they effectively straighten the wire 300 regardless of its direction of bending.

[0024] In this embodiment, each fixed straightening roller 120 rotates actively. Specifically, one of the fixed straightening rollers 120 is connected to a drive element (e.g., a geared motor, not shown in the figure) for driving its rotation, and adjacent fixed straightening rollers 120 are connected by gear transmission. It is easy to understand that the rotation direction of each fixed straightening roller 120 should be consistent. Therefore, in practical applications, each fixed straightening roller 120 is connected to a transmission gear 170, and adjacent transmission gears 170 transmit power through transition gears 180. It is easy to understand that the drive element can also be connected to one of the transition gears 180. Furthermore, it is easy to understand that, based on the horizontal straightening zone and the vertical straightening zone, each of the horizontal straightening zone and the vertical straightening zone should be equipped with an independent drive element to drive the fixed straightening rollers 120 in their respective zones to rotate.

[0025] In this embodiment, the straightening machine 100 has a pair of symmetrically arranged infeed straightening rollers 150 at the front end of the wire 300 conveying direction, and at least three pairs of symmetrically arranged outfeed straightening rollers 160 at the end of the wire 300 conveying direction. In other embodiments, the number of pairs of infeed straightening rollers 150 and the number of pairs of outfeed straightening rollers 160 can of course be set to other quantities. It is easy to understand that the position of one of the pair of infeed straightening rollers 150 is fixed, and the position of the other is also adjusted by the above-mentioned adjusting component 140; the pair of outfeed straightening rollers 160 also adopts the same design.

[0026] It is worth noting that, based on the above, the wire 300 passes through the inlet straightening roller 150, the horizontal straightening zone, the vertical straightening zone, and the outlet straightening roller 160 in sequence, undergoing straightening in four stages. The inlet straightening roller 150 is responsible for the initial deformation of the wire 300. The pressure (i.e., the amount of compression on the wire 300) in each stage is adjusted proportionally. For example, the compression amount of the inlet straightening roller 150 on the wire 300 is 25%. The compression amounts of the wire 300 in the horizontal straightening zone, the vertical straightening zone, and the outlet straightening roller 160 decrease sequentially. For example, the compression amount of the wire 300 in the horizontal straightening zone is 35%, the compression amount of the wire 300 in the vertical straightening zone is 25%, and the compression amount of the wire 300 in the outlet straightening roller 160 is 15%. It should be understood that in other embodiments, the compression amounts of the wire 300 in each stage can of course be selected in other proportions.

[0027] In this embodiment, the wire 300 is pulled by the traction machine 200, and the straightening machine 100 is not equipped with an independent traction power. (See reference) Figure 6 and Figure 7 Specifically, the traction machine 200 includes a traction frame 210 and two sets of upper and lower traction tracks mounted on the traction frame 210. A cable passage is formed between the two sets of traction tracks, through which the cable 300 passes during use.

[0028] The traction track is connected to a power component (e.g., a geared motor, not shown in the figure) that drives its rotation. Those skilled in the art should understand that each set of traction tracks is equipped with at least one driven wheel and one driving wheel. In practical applications, in order to ensure that the two sets of traction tracks have the same speed, the driving wheels of the two sets of traction tracks are connected by a transmission structure such as a synchronous chain, synchronous belt, or synchronous gear. Then, the power component drives the driving wheel of one set of traction tracks to rotate.

[0029] The upper traction track 220 has several upper pressure roller assemblies 240 spaced apart along its straight section on its inner side. The lower traction track 230 has lower pressure roller assemblies 250 at positions corresponding to the upper pressure roller assemblies 240 on its inner side. The upper pressure roller assemblies 240 and lower pressure roller assemblies 250 are connected to a driving component to drive them to move closer or further apart, thereby clamping or releasing the two sets of traction tracks. During operation, the wire 300 traction machine 200 can change the clamping (or releasing) state of one or more sets of upper pressure roller assemblies 240 and lower pressure roller assemblies 250 according to the actual specifications, material, or traction force requirements of the wire 300, dynamically adjusting the clamping force of the two sets of traction tracks on the wire 300. As an option, in this embodiment, there are three sets of upper pressure roller assemblies 240, and correspondingly, there are also three sets of lower pressure roller assemblies 250; in other embodiments, the upper pressure roller assemblies 240 and lower pressure roller assemblies 250 can of course be set to other corresponding numbers.

[0030] In this embodiment, the driving component adopts a separate dual-cylinder driving structure. Specifically, the driving component includes an upper cylinder 260 and a lower cylinder 270 mounted on the traction frame 210. The upper cylinder 260 is connected to the upper pressure roller assembly 240, and the lower cylinder 270 is connected to the lower pressure roller assembly 250. In this embodiment, the upper pressure roller assembly 240 and the lower pressure roller assembly 250 have the same structure, both including a transition rod 243, two support rods 242, and several rollers 241. The two support rods 242 are arranged side by side, and the several rollers 241 are arranged at intervals and rotatably connected between the two support rods 242. The transition rod 243 is fixedly connected between the two support rods 242. Based on this, the output end of the upper cylinder 260 is connected to the transition rod 243 in the upper pressure roller assembly 240, and the output end of the lower cylinder 270 is connected to the transition rod 243 in the lower pressure roller assembly 250. Furthermore, it is worth noting that the outer surface of the roller 241 makes rolling contact with the inner surface of the traction track to reduce track running resistance when clamped.

[0031] In this embodiment, a pair of width-limiting rollers 280 are arranged side by side at both the inlet and outlet ends of the wire passage to guide the traction wire 300 and prevent it from deviating during traction.

[0032] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A wire straightening device, comprising a straightening machine and a traction machine, characterized in that, The straightening machine includes a fixed roller group and a movable roller group rotatably mounted on the straightening machine frame. The fixed roller group consists of several fixed straightening rollers, and the movable roller group consists of several movable straightening rollers. The fixed straightening rollers and movable straightening rollers are arranged alternately along the wire conveying direction. Each movable straightening roller is connected to an adjustment component that drives it to move closer to or away from the side of the fixed roller group, so as to apply pressure to the wire by gradually reducing the extrusion amount at the end of the wire conveying direction and eliminating residual stress in the wire.

2. The wire straightening device according to claim 1, characterized in that, The adjustment assembly includes a slider and an adjustment screw. The straightening frame is provided with a slide groove, the slider is slidably fitted in the slide groove, the movable straightening roller is rotatably mounted on the slider, the adjustment screw is rotatably mounted in the slide groove, one end of the adjustment screw extends out of the slide groove and is provided with an adjustment handwheel, and the slider and the adjustment screw are connected by a thread.

3. The wire straightening device according to claim 2, characterized in that, The straightening frame has a scale near the slider, and the slider has a pointer that points to the scale so that the pointer indicates the corresponding measurement scale on the scale during the sliding of the slider.

4. The wire straightening device according to claim 1, characterized in that, The straightening frame is provided with a horizontal straightening zone and a vertical straightening zone in sequence along the wire conveying direction. The fixed roller group and the movable roller group in the horizontal straightening zone are arranged in the front-to-back direction, and the fixed roller group and the movable roller group in the vertical straightening zone are arranged in the up-down direction.

5. The wire straightening device according to claim 4, characterized in that, The straightening machine has at least one pair of symmetrically arranged infeed straightening rollers at the front end of the wire conveying direction and at least one pair of symmetrically arranged outfeed straightening rollers at the end of the wire conveying direction.

6. The wire straightening device according to claim 1, characterized in that, One of the fixed straightening rollers is connected to a drive element for driving its rotation, and adjacent fixed straightening rollers are connected by gear transmission.

7. The wire straightening device according to any one of claims 1-6, characterized in that, The traction machine includes two sets of upper and lower traction tracks mounted on the traction frame. The traction tracks are connected to a power component that drives them to rotate. A line passage is formed between the two sets of traction tracks. Several upper pressure roller assemblies are provided at intervals along the straight section of the inner side of the upper traction track. Lower pressure roller assemblies are provided at positions corresponding to the upper pressure roller assemblies on the inner side of the lower traction track. The upper and lower pressure roller assemblies are connected to a driving component to drive them to move closer or further apart, thereby clamping or releasing the two sets of traction tracks.

8. The wire straightening device according to claim 7, characterized in that, The driving component includes an upper cylinder and a lower cylinder mounted on the traction frame. The upper cylinder is connected to the upper pressure roller assembly, and the lower cylinder is connected to the lower pressure roller assembly.

9. The wire straightening device according to claim 8, characterized in that, The upper pressure roller assembly and the lower pressure roller assembly have the same structure, both including a transition rod, two support rods and several rollers. The two support rods are arranged side by side, and the several rollers are arranged at intervals and rotatably connected between the two support rods. The transition rod is fixedly connected between the two support rods.

10. The wire straightening device according to claim 7, characterized in that, A pair of width-limiting rollers are arranged side by side at both the inlet and outlet ends of the line passage.

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