A device for inspecting defects of a tire carcass steel wire

Abstract

The utility model belongs to rubber tire production technical field especially relates to a tire framework steel wire defect inspection device, its characterized in that, including bottom frame, row roller frame, centering pinch roll, portal frame, upper probe unit, lower probe unit and lifting guide roller, bottom frame is connected with row roller frame, centering pinch roll and portal frame, is equipped with row roller on row roller frame, centering pinch roll is connected with synchronous drive mechanism, is equipped with code scanning unit and upper probe unit on portal frame, still be equipped with lower probe unit and lifting guide roller on bottom frame, the row roller of corresponding lower probe unit and lifting guide roller installation position is divided into two parts, lower probe unit and lifting guide roller are located in the empty place, the utility model has the advantages of: introducing eddy current sensor, rotating one week in the framework steel wire defect multiple position, the distance of detecting rubber tire two side framework steel wire distance tire surface, and judging whether the tire is qualified or whether there is safety hazard according to this, ensure the quality of tire.

Description

Technical Field

[0001] This utility model belongs to the field of rubber tire manufacturing technology, and in particular relates to a tire skeleton steel wire defect inspection device. Background Technology

[0002] Tires are ring-shaped rubber products used on various vehicles or machinery. Statistics show that half of the world's rubber production is used for tire manufacturing. Tire production typically involves the following processes: mixing, rubber component preparation, extrusion, calendering, bead forming, cord cutting, attaching triangular rubber strips, belt layer forming, tire forming, vulcanization, final inspection, and tire testing. Quality inspection in rubber tire production mainly includes three categories: material testing, routine testing items, and performance testing.

[0003] Routine inspection items include outer dimensions, hardness, durability, high-speed performance, and appearance quality. Defect inspection of steel wires in rubber tires is mainly done visually through appearance, tread pattern, and tire structure; professional instruments may be needed when necessary. Visual inspection of the tread and sidewalls: High-quality steel wire tires should have a smooth, flat tread without obvious bumps, bubbles, or cracks; the sidewall markings should be clear and complete, including brand, specifications, and production date. If the markings are blurry or the tread has defects, it may be a substandard product. Coating and corrosion: Visually inspect the steel wire surface coating for continuity and uniformity, without obvious color differences, rust, or oil stains. Tread depth and uniformity: New steel wire tires should have a deep and evenly distributed tread pattern to ensure drainage and grip. Shallow or uneven tread patterns may indicate insufficient steel wire support. Wear indicators (usually 1.6mm high) are present in the tread grooves; tires must be replaced when worn to these indicators. Tire Carcass Structure and Elasticity: A high-quality steel-belted tire should feel elastic when pressed, with the steel wires tightly packed. If it feels soft or has noticeable gaps, the steel wire quality may be poor. Bulges or Cracks: Bulges on the tire sidewall or cracks in the tread may expose the steel wire layer, requiring immediate replacement. Magnet Test: Use a magnet to test the attraction force against the tire tread to preliminarily determine the presence of steel wires.

[0004] Chinese utility model patent application number 201120514955.0 discloses a solid tire structure composed of two or more types of rubber compounds, with several rubber-fixing steel wires arranged in the inner layer of rubber compound; each fixing steel wire is composed of a single layer of steel wires. This single-wire arrangement reduces the lateral area of ​​the fixing steel wires, preventing the rubber compound from squeezing the rubber compound during vulcanization and causing the steel wires to move, thus avoiding wire skewing. Furthermore, the single-wire arrangement increases the bottom area of ​​the steel wires, resulting in more even stress distribution between the rim and the tire bead, increasing resistance to relative movement between the rim and the tire interior and suppressing poor rolling. Moreover, the single-row steel wire structure ensures more even stress distribution throughout the tire, making it less likely for the steel wires to unravel or shift under high loads and during cornering. This saves on steel wire wrapping fabric and prevents tire bulge damage caused by relative creep between the steel wires and the rubber compound. In existing technologies, the steel wires can shift after being combined with the rubber compound, resulting in uneven thickness of the rubber compound covering the tire carcass. This can cause bulges in minor cases and even punctures in the rubber layer by the steel wires, leading to defective products. Therefore, specialized inspection equipment is needed to promptly identify and remove defective products, improving the yield rate of tire production lines. Current methods still rely primarily on manual visual inspection, which is inefficient and has a significant rate of missed inspections. Utility Model Content

[0005] The purpose of this invention is to provide a tire skeleton wire defect inspection device that overcomes the shortcomings of existing technologies. By introducing an eddy current sensor, the device rotates once around the location where defects frequently occur in the skeleton wire, detecting the distance between the skeleton wires on both sides of the rubber tire and the tire surface. This allows for quick determination of whether there are bulges or wire protrusions, improving the inspection efficiency and accuracy of this process, ensuring tire quality, and achieving the goal of improving the quality and efficiency of existing automated production lines.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A tire skeleton steel wire defect inspection device includes a bottom frame, a roller rack, a centering roller, a gantry frame, an upper probe unit, a lower probe unit, and a lifting guide roller. The bottom frame is connected to the roller rack, the centering roller, and the gantry frame. The roller rack is equipped with rollers, and the centering roller is connected to a synchronous drive mechanism. The gantry frame is equipped with a barcode scanning unit and an upper probe unit. The bottom frame is also equipped with a lower probe unit and a lifting guide roller. The roller rack corresponding to the installation positions of the lower probe unit and the lifting guide roller is divided into left and right parts, and the lower probe unit and the lifting guide roller are located in the gap between the two parts.

[0007] Furthermore, both the upper and lower probe units include a lateral movement mechanism, a lifting mechanism, and an eddy current sensor. The lateral movement mechanism includes a mounting base, a lateral movement driver, a slide rail, and a slide block. The mounting base is provided with a slide rail, and the slide block is movably connected to the slide rail. The lateral movement driver is any one of a lateral movement cylinder, a lateral movement hydraulic cylinder, or a lateral movement electric push rod. The slide block is connected to the lifting mechanism. The lifting mechanism is any one of a lifting cylinder, a lifting hydraulic cylinder, or a lifting electric push rod. The movable end of the lifting mechanism is hinged to the probe base, and the probe base is provided with an eddy current sensor.

[0008] Furthermore, the lifting guide roller includes a guide roller cylinder, a vertical roller frame, a fixed frame, and vertical rollers. The fixed frame is connected to the bottom frame, the guide roller cylinder is connected to the fixed frame, the piston end of the guide roller cylinder is connected to a fixed block, a slider is fixedly connected to the guide roller cylinder body, the fixed block is connected to the vertical roller frame, a track is provided on one side of the vertical roller frame, the track is matched and connected to the slider, two vertical rollers are arranged side by side and movably connected to a bracket located on the other side of the vertical roller frame, when the guide roller cylinder is activated, the vertical roller frame is in either of the upper or lower working positions.

[0009] Furthermore, the transverse drive is replaced by a servo motor, a rack and a gear. The gear is connected to the output shaft of the servo motor, the rack is connected to the mounting base, the rack and the gear mesh, and limit switches are provided at the front and rear ends of the rack.

[0010] Furthermore, the probe holder includes an element holder and a friction-reducing seat. The element holder has a central hole in which an eddy current sensor is installed. A hinged trunnion is provided on each of the left and right sides of the element holder. The friction-reducing seat is connected to the element holder by screws. The friction-reducing seat has two parallel pins with roller sleeves on them. The eddy current sensor is equidistant from the two pins.

[0011] Furthermore, the rolling sleeves are radial ball bearings arranged in a continuous pattern.

[0012] Furthermore, the synchronous drive mechanism includes a first roller clamping arm, a first vertical shaft, a first swing sleeve, a second roller clamping arm, a second vertical shaft, a second swing sleeve, a synchronous connecting rod, and a synchronous cylinder. The first roller clamping arm is connected to the first vertical shaft and the first swing sleeve in sequence, and the second roller clamping arm is connected to the second vertical shaft and the second swing sleeve in sequence. The piston end of the synchronous cylinder is connected to the drive swing arm on the first or second swing sleeve, and the synchronous connecting rod is connected between the synchronous swing arms on the first and second swing sleeves.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1) Introduce an eddy current sensor. The sensor rotates once on the surface of the location where defects of the skeleton steel wire occur frequently, and detects the distance between the skeleton steel wire on both sides of the rubber tire and the tire surface. Based on this, it can determine whether the tire is qualified or whether there is a safety hazard, so as to ensure the quality of the tire and achieve the goal of improving the quality and efficiency of the existing automated production line. 2) This device has a simple and compact structure and is easy to maintain. It is applicable to the automatic detection of defects in the skeleton steel wires of rubber tires of various specifications and sizes. It can be freely combined with various stations of the tire production line to achieve rapid detection of uniform thickness in the surface quality of rubber tires. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 yes Figure 1 A top-down view; Figure 3 yes Figure 2 A cross-sectional view along line AA shows the relative positions of the upper probe, lower probe, and lifting guide roller; Figure 4 This is a schematic diagram of the upper probe structure in an embodiment of this utility model; Figure 5 This is a schematic diagram of the lower probe structure in an embodiment of this utility model; Figure 6 This is a schematic diagram of the centering roller and its synchronous drive mechanism in an embodiment of this utility model; Figure 7 yes Figure 6 Top view; In the diagram: 1-Bottom frame, 2-Roller rack, 3-Centering roller, 4-Gantry frame, 5-Upper probe unit, 6-Lower probe unit, 7-Lifting guide roller, 8-Roller rack, 9-Synchronous drive mechanism, 10-Scanning unit, 11-Transverse movement mechanism, 12-Lifting mechanism, 13-Eddy current sensor, 14-Mounting base, 15-Transverse movement driver, 16-Slide rail, 17-Slide block, 18-Probe base, 19-Guide roller cylinder, 20-Vertical roller frame, 21-Fixed frame, 22-Vertical roller 23-Fixed block, 24-Slider, 25-Bracket, 26-Servo motor, 27-Rack, 28-Gear, 29-Component seat, 30-Friction reduction seat, 31-Hinged trunnion, 32-Pin, 33-Roll sleeve, 34-Roller arm one, 35-Roller arm two, 36-Vertical shaft one, 37-Vertical shaft two, 38-Swing sleeve one, 39-Swing sleeve two, 40-Synchronous connecting rod, 41-Synchronous cylinder, 42-Drive swing arm, 43-Synchronous swing arm, 44-Tire to be inspected, 45-Rail. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0018] See Figure 1-7 This is a schematic diagram of an embodiment of a tire skeleton wire defect inspection device of this utility model. It includes a bottom frame 1, a roller rack 2, a centering roller 3, a gantry frame 4, an upper probe unit 5, a lower probe unit 6, and a lifting guide roller 7. The bottom frame 1 is connected to the roller rack 2, the centering roller 3, and the gantry frame 4. The roller rack 2 is equipped with rollers 8, and the centering roller 3 is connected to a synchronous drive mechanism 9. The gantry frame 4 is equipped with a scanning unit 10 and the upper probe unit 5. The bottom frame 1 also has a lower probe unit 6 and a lifting guide roller 7. The rollers 8 corresponding to the installation positions of the lower probe unit 6 and the lifting guide roller 7 are divided into left and right parts, with the lower probe unit 6 and the lifting guide roller 7 located in the gap between the two parts. When the rotation directions of the rollers in the left and right halves are the same, the tire to be inspected can be pushed backward. When the rotation directions of the rollers in the left and right halves are opposite, the tire to be inspected can be rotated in place around its own centerline.

[0019] Both the upper probe unit 5 and the lower probe unit 6 include a horizontal movement mechanism 11, a lifting mechanism 12, and an eddy current sensor 13. The horizontal movement mechanism 11 includes a mounting base 14, a horizontal movement driver 15, a slide rail 16, and a slide block 17. The mounting base 14 is equipped with the slide rail 16, and the slide block 17 is movably connected to the slide rail 16. The horizontal movement driver 15 consists of a servo motor 26, a rack 27, and a gear 28. The gear 28 is connected to the output shaft of the servo motor 26, and the rack 27 is connected to the mounting base 14. The rack 27 and the gear 28 mesh with each other, and limit switches (not shown in the figure) are provided at both ends of the rack 27. The slide block 17 is connected to the lifting mechanism 12. The lifting mechanism 12 is any one of a lifting cylinder, a lifting hydraulic cylinder, or a lifting electric push rod. The movable end of the lifting mechanism 12 is hinged to the probe seat 18, and the probe seat 18 is equipped with an eddy current sensor 13.

[0020] The lifting guide roller 7 includes a guide roller cylinder 19, a vertical roller frame 20, a fixed frame 21, and vertical rollers 22. The fixed frame 21 is connected to the bottom frame 1. The guide roller cylinder 19 is connected to the fixed frame 21. The piston end of the guide roller cylinder 19 is connected to a fixed block 23. A slider 24 is fixedly connected to the body of the guide roller cylinder 19. The fixed block 23 is connected to the vertical roller frame 20. A track 45 is provided on one side of the vertical roller frame 20. The track 45 is matched and connected to the slider 24. Two vertical rollers 22 are arranged side by side and movably connected to a bracket 25 located on the other side of the vertical roller frame 20. When the guide roller cylinder 19 is activated, the vertical roller frame 20 is in either of the upper or lower working positions. In the upper working position, the tire to be inspected can be blocked. In the lower working position, the lifting guide roller 7 falls below the roller 8 without affecting the conveying of the tire.

[0021] In the embodiments, the transverse drive 15 can also be replaced by any one of a transverse cylinder, a transverse hydraulic cylinder, or a transverse electric push rod, as long as it can carry the lifting mechanism 12 to move accurately laterally.

[0022] The probe holder 18 includes an element holder 29 and a friction-reducing holder 30. The element holder 29 has a central opening into which an eddy current sensor 13 is installed. A hinged trunnion 31 is located on each of the left and right sides of the element holder 29. The hinged trunnions 31 allow the element holder 29 to rotate at small angles to adapt to changes in the tire surface angle and maintain stable contact. The friction-reducing holder 30 is connected to the element holder 29 by screws. The friction-reducing holder 30 has two parallel pins 32, each with a roller sleeve 33. The eddy current sensor 13 is equidistant from the two pins 32. The roller sleeve 33 is composed of continuously arranged radial ball bearings, which reduces frictional resistance and ensures sufficient strength.

[0023] The synchronous drive mechanism 9 includes a first roller clamping arm 34, a first vertical shaft 36, a first swing sleeve 38, a second roller clamping arm 35, a second vertical shaft 37, a second swing sleeve 39, a synchronous connecting rod 40, and a synchronous cylinder 41. The first roller clamping arm 34, the first vertical shaft 36, and the first swing sleeve 38 are connected in sequence. The second roller clamping arm 35, the second vertical shaft 37, and the second swing sleeve 39 are connected in sequence. The piston end of the synchronous cylinder 41 is connected to the drive swing arm 42 on the first swing sleeve 38 or the second swing sleeve 39. The synchronous connecting rod 40 connects the synchronous swing arms 43 on the first swing sleeve 38 and the second swing sleeve 39. In the embodiment, the synchronous cylinder 41 can be replaced by a hydraulic cylinder or an electric push rod to drive the two centering rollers 3 to move synchronously. The centering rollers 3 clamp the tire 44 and push it onto the lifting guide roller 7 to achieve centering. This ensures that the tire 44 under inspection can always rest against the lifting guide roller 7 when it rotates. The tire 44 under inspection slides on the surface of the vertical roller 22 to reduce friction.

[0024] The eddy current sensor selected in this embodiment is from the EX-V series, with a measurement range of 0-10 mm and a measurement accuracy of 1-2 micrometers. This eddy current sensor can measure the distance between the measured metal conductor and the probe surface in a non-contact, highly linear, and high-resolution manner, both statically and dynamically. It is a non-contact linearized metrological tool. The eddy current sensor can accurately measure the static and dynamic relative displacement changes between the measured object (which must be a metal conductor) and the probe end face. In the condition analysis, vibration research, and analysis of high-speed rotating machinery and reciprocating motion machinery, it can continuously and accurately acquire various parameters of the rotor vibration state for non-contact, high-precision vibration and displacement signals, such as the radial vibration, amplitude, and axial position of the skeleton steel wire. Due to its advantages of high long-term reliability, wide measurement range, high sensitivity, and high resolution, the eddy current sensor is widely used in the online monitoring and fault diagnosis of large rotating machinery.

[0025] In this embodiment of the device, the tire 44 to be inspected is pushed to the middle of the bottom frame 1 by the rollers 8. The lifting guide roller 7 rises and stops the tire 44. The centering roller 3, driven by the synchronous cylinder 41, synchronously pushes the tire 44 against the lifting guide roller 7. After it is close, the left and right rollers 8 rotate in opposite directions, causing the tire 44 to rotate in place. The scanning unit 10 scans the code on the side of the tire to identify the tire model. The upper probe unit 5 and the lower probe unit 6 move laterally to the position corresponding to the detection point of the tire carriage wire of the model. The upper probe unit 5 and the lower probe unit 6 descend until the friction reduction seat 30 contacts the side of the tire. The tire rotates one revolution, and the distance data between the detection point wire and the eddy current sensor 13 is collected. When the data exceeds the design value, the controller alarms and prompts the operator to handle it further.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for inspecting defects in steel wires of a tire skeleton, characterized in that, It includes a bottom frame, a roller rack, a centering roller, a gantry frame, an upper probe unit, a lower probe unit, and a lifting guide roller. The bottom frame is connected to the roller rack, the centering roller, and the gantry frame. The roller rack is equipped with rollers, and the centering roller is connected to a synchronous drive mechanism. The gantry frame is equipped with a barcode scanning unit and an upper probe unit. The bottom frame is also equipped with a lower probe unit and a lifting guide roller. The roller rack corresponding to the installation positions of the lower probe unit and the lifting guide roller is divided into left and right parts, and the lower probe unit and the lifting guide roller are located in the gap between the two parts.

2. The tire carcass steel wire defect inspection device according to claim 1, characterized in that, Both the upper and lower probe units include a lateral movement mechanism, a lifting mechanism, and an eddy current sensor. The lateral movement mechanism includes a mounting base, a lateral movement driver, a slide rail, and a slide block. The mounting base is provided with a slide rail, and the slide block is movably connected to the slide rail. The lateral movement driver is any one of a lateral movement cylinder, a lateral movement hydraulic cylinder, or a lateral movement electric push rod. The slide block is connected to the lifting mechanism. The lifting mechanism is any one of a lifting cylinder, a lifting hydraulic cylinder, or a lifting electric push rod. The movable end of the lifting mechanism is hinged to the probe base, and the probe base is provided with an eddy current sensor.

3. The tire carcass steel wire defect inspection device according to claim 1, characterized in that, The lifting guide roller includes a guide roller cylinder, a vertical roller frame, a fixed frame, and vertical rollers. The fixed frame is connected to the bottom frame, the guide roller cylinder is connected to the fixed frame, the piston end of the guide roller cylinder is connected to a fixed block, a slider is fixedly connected to the guide roller cylinder body, the fixed block is connected to the vertical roller frame, a track is provided on one side of the vertical roller frame, the track is matched and connected to the slider, two vertical rollers are arranged side by side and movably connected to a bracket located on the other side of the vertical roller frame, when the guide roller cylinder is activated, the vertical roller frame is in either of the upper or lower working positions.

4. The tire carcass steel wire defect inspection device according to claim 2, characterized in that, The transverse drive is replaced by a servo motor, a rack and a gear. The gear is connected to the output shaft of the servo motor, and the rack is connected to the mounting base. The rack and the gear mesh with each other, and limit switches are provided at the front and rear ends of the rack.

5. The tire skeleton steel wire defect inspection device according to claim 2, characterized in that, The probe holder includes an element holder and a friction-reducing holder. The element holder has a central hole in which an eddy current sensor is installed. A hinged trunnion is provided on each of the left and right sides of the element holder. The friction-reducing holder is connected to the element holder by screws. The friction-reducing holder has two parallel pins with roller sleeves on them. The eddy current sensor is equidistant from the two pins.

6. The tire carcass steel wire defect inspection device according to claim 5, characterized in that, The rolling sleeves are radial ball bearings arranged in a continuous pattern.

7. The tire carcass steel wire defect inspection device according to claim 1, characterized in that, The synchronous drive mechanism includes a first roller clamping arm, a first vertical shaft, a first swing sleeve, a second roller clamping arm, a second vertical shaft, a second swing sleeve, a synchronous connecting rod, and a synchronous cylinder. The first roller clamping arm is connected to the first vertical shaft and the first swing sleeve in sequence, and the second roller clamping arm is connected to the second vertical shaft and the second swing sleeve in sequence. The piston end of the synchronous cylinder is connected to the drive swing arm on the first or second swing sleeve. The synchronous connecting rod is connected between the synchronous swing arms on the first and second swing sleeves.

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