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CN-121978130-A - High-speed wire harness core wire quality on-line measuring device

CN121978130ACN 121978130 ACN121978130 ACN 121978130ACN-121978130-A

Abstract

The invention relates to the technical field of high-speed cable production detection, and particularly discloses a high-speed wire harness core wire quality online detection device which comprises a rack, a detection assembly and a downstream marking assembly, wherein the detection assembly is arranged along a wire harness path. The detection assembly is provided with an air floatation guide mechanism and comprises an air permeation sliding block and an adjusting assembly which are in a circumferential array, the adjusting assembly drives the sliding block to move radially and synchronously by adopting a chuck-like principle, the sliding block forms a high-rigidity air cushion constraint field around a high-speed core wire through micropores to realize non-contact guide, the marking assembly comprises a driving radial arm, a marking head and a connecting rod, the driving radial arm drives the marking head to perform circumferential motion, the speed of the marking head is synchronous with that of the core wire at the lowest point of a track, and the technical problem of marking ambiguity caused by vibration damage of a wire rod and air flow interference of a guide wheel under a high-speed working condition is solved by matching with a special wind breaking cover. The invention realizes nondestructive testing and high-definition fixed point marking of the high-speed wire harness.

Inventors

  • LIU XIAOMING
  • Ding Zhenbiao
  • LI XUEREN
  • TANG ZHIXIONG

Assignees

  • 东莞市捷信机电设备有限公司

Dates

Publication Date
20260505
Application Date
20260225

Claims (10)

  1. 1. The high-speed wire harness core wire quality online detection device is characterized by comprising a frame (1), a detection assembly (2) and a marking assembly (3), wherein the detection assembly (2) is arranged along a wire harness transmission path, the marking assembly (3) is located at the downstream of the detection assembly (2), the detection assembly (2) is provided with an air floatation guide mechanism (21), the air floatation guide mechanism (21) comprises an air permeation sliding block (211) and an adjusting assembly (22), the air permeation sliding blocks (211) are distributed in a circumferential array, the adjusting assembly (22) drives a plurality of air permeation sliding blocks (211) to move synchronously in the radial direction, one side of the air permeation sliding blocks (211) close to a wire core is provided with a plurality of air holes (213), the air permeation sliding blocks (211) are externally connected with an air supply assembly (212), the air permeation sliding blocks (211) are used for forming an air cushion constraint field around the wire core wire (4) which moves at a high speed, the marking assembly (3) comprises a driving radial arm (31) and a marking head (32), the driving radial arm (31) drives the marking head (32) to do circumferential movement, so that the tangential speed of the marking head (32) is the tangential speed when passing through the lowest point of the wire core wire (4) is always perpendicular to the driving radial speed of the wire (32).
  2. 2. The high-speed wire harness core wire quality online detection device according to claim 1, wherein the adjusting assembly (22) comprises a fixed disc (221) and a claw (222), the fixed disc (221) is arranged on the frame (1), the claw (222) is arranged on the fixed disc (221) in a sliding mode in the radial direction, the air-permeable sliding block (211) is fixedly arranged on the claw (222), and the air-permeable sliding block (211) moves along with the claw (222) in the radial direction.
  3. 3. The high-speed wire harness core wire quality online detection device according to claim 1, wherein one side of the breathable sliding block (211) facing the core wire (4) is provided with an inward concave arc surface (214) made of porous sintered metal or microporous ceramic material, and the distribution density of air holes (213) on the inward concave arc surface (214) is in gradient distribution with high two ends and low middle, so that an air cushion constraint field forms high-pressure air curtains at two axial ends.
  4. 4. The high-speed wire harness core wire quality online detection device according to claim 1, wherein the detection assembly (2) is mounted on the frame (1) through a floating shock-absorbing base (23), and the floating shock-absorbing base (23) is provided with an elastic damping element, so that low-frequency mechanical vibration transmitted to the air floatation guide mechanism (21) from the outside can be filtered.
  5. 5. The device for on-line detection of high-speed wire harness core wire quality as set forth in claim 1, wherein the driving radial arm (31) comprises a plurality of connecting rods (33) arranged along the radial direction, the marking head (32) is arranged at one end of the connecting rods (33) far away from the rotation axis, and the connecting rods (33) are clamped on the driving cantilever.
  6. 6. The high-speed wire harness core wire quality online detection device according to claim 1 is characterized in that a wind breaking cover (34) is arranged on the outer periphery of the marking head (32), the front windward surface of the wind breaking cover (34) is designed into an sharp V shape, the wind breaking cover (34) is consistent with the tangential speed direction of rotation of a driving radial arm (31), when the marking head (32) cuts into the track of the core wire (4) at a high speed, the wind breaking cover (34) breaks the air flow on the surface of the core wire (4) to two sides, so that a nozzle of the marking head (32) positioned in the wind breaking cover (34) is positioned in an air flow static stagnation area, and ink drops are prevented from being blown away by the high-speed air flow.
  7. 7. The high-speed wire harness core wire quality online detection device according to claim 6, wherein a flexible ring is arranged on the end face, close to a cable, of the wind breaking cover (34), the flexible ring is clamped on the wind breaking cover (34), and a yielding gap (351) matched with the section shape of the wire core is formed in one end, close to the wire core, of the flexible sealing ring (35).
  8. 8. The high-speed wire harness core wire quality online detection device according to claim 1, wherein an electro-pneumatic slip ring is integrated at the rotation axis of the driving radial arm (31), and a control signal wire and an ink supply pipeline required by a marking head (32) penetrate through a central hole of the electro-pneumatic slip ring to be connected to the marking head (32) in rotation.
  9. 9. The high-speed wire harness core wire quality online detection device according to claim 1, wherein the detection assembly (2) comprises two groups of air floatation guide mechanisms (21) which are arranged at intervals along the transmission direction of the core wire (4), a detection area is formed between the two groups of air floatation guide mechanisms (21), an annular light source (24) and an industrial camera (25) are arranged in the detection area, and the core wire (4) is kept in a detection state in the detection area under the pneumatic clamping of the two groups of air floatation guide mechanisms (21).
  10. 10. The high-speed wire harness core wire quality online detection device according to claim 2, wherein the adjusting assembly (22) further comprises a driving motor (26), a controller and a transmission gear, the driving motor (26) drives a claw (222) to approach or separate along a fixed disc (221) through the transmission gear, and the controller controls the driving motor (26) to drive the claw (222) to automatically adjust the guide aperture enclosed by the ventilation sliding block (211) according to the diameter specification of the core wire (4) to be detected.

Description

High-speed wire harness core wire quality on-line measuring device Technical Field The invention relates to the technical field of high-speed cable production detection, in particular to a high-speed harness core wire quality online detection device. Background With the rapid development of new energy automobiles, aerospace and 5G communication technologies, the quality requirements on transmission harnesses are increasingly stringent. In modern cable production, the production speed is often extremely fast (typically between 300 and 1000 meters/min). In such high-speed operation environments, online detection and marking of breakage, protrusion, depression, and color of the core wire surface insulation layer face a great technical challenge. The Chinese patent application document with the bulletin number of CN102297867A discloses a wire harness assembly quality detection system which comprises a wire harness image acquisition module and a judgment detection module, wherein the wire harness image acquisition module is used for acquiring one or more frames of wire harness images, the judgment detection module is used for intercepting local images of each wire in the wire harness images and comparing the local images of each wire with standard wire harness images, and when the local images of each wire in one wire harness are consistent with the standard wire harness images, the detection is qualified, otherwise, the detection is unqualified. However, in high speed scenarios, this prior art has the significant disadvantage that, first, there is physical contact and intense friction between the mechanical puck and the cable surface. When the cable is in high-speed operation, radial runout of the mechanical wheel can be directly transmitted to the cable, so that an imaging focal length is unstable and an image is blurred, and meanwhile, pressure of the mechanical wheel is easy to leave an indentation or scratch on the surface of a precise cable (such as a foaming insulating layer cable) to cause secondary damage. Second, existing defect marking typically employs a stationary inkjet printer. When the line speed is high, the airflow of the surface layer on the surface of the cable is very strong, and the ejected ink drops can be directly blown away, so that the marks are blurred and the positions of the marks are shifted. The huge relative speed exists between the fixed spray head and the cable moving at high speed, so that the sprayed marking pattern is severely stretched and deformed (Doppler effect and geometric stretching), and a clearly readable mark cannot be formed. In summary, developing a detection device that can adapt to high-speed working conditions, realize contactless stable guiding, and overcome airflow interference to perform high-definition marking is an urgent need in the current industry. Disclosure of Invention The invention provides a high-speed wire harness core wire quality online detection device, and aims to solve the problems that a high-speed cable is large in guide vibration, easy to damage the surface, and high-speed marks are greatly disturbed by airflow and serious in pattern deformation in the related technology. The high-speed wire harness core wire quality online detection device comprises a frame, a detection assembly and a marking assembly, wherein the detection assembly is arranged along a wire harness transmission path, the marking assembly is positioned at the downstream of the detection assembly, the detection assembly is provided with an air floatation guide mechanism, the air floatation guide mechanism comprises air permeation sliding blocks and an adjusting assembly, the air permeation sliding blocks are distributed in a circumferential array, the adjusting assembly drives a plurality of air permeation sliding blocks to synchronously move along the radial direction, a plurality of air holes are formed in one side, close to a wire core, of each air permeation sliding block, the air permeation sliding blocks are externally connected with an air supply assembly and used for forming an air cushion constraint field around the high-speed moving core wire, the marking assembly comprises a driving radial arm and a marking head, the driving radial arm drives the marking head to do circular motion, so that the tangential speed of the marking head when passing through the lowest point of the track is the same as the core wire speed, and the driving radial arm enables the marking head to be always kept perpendicular to the core wire in the whole motion process. The air cushion constraint field constructed by the air-permeable sliding blocks has the effect that the traditional mechanical wheel contact type guiding is abandoned. In high-speed transmission, the core wire is suspended and fixed in the center of the flow field by the high-pressure air film, and the air cushion not only plays a role in lubrication, avoids mechanical scratch, but also serves as a high-frequency air spring