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Detection system and method for broken needle in workpiece

A detection system and detection method technology, which is applied in the field of needle detection machines, can solve problems such as inability to detect metal workpieces, achieve the effect of improving detection accuracy and avoiding detection interference

Inactive Publication Date: 2016-12-07
NINGBO JIUZONG INTELLIGENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defect that the existing needle detectors cannot detect metal workpieces due to the existence of eddy currents, the present invention provides a detection system for interrupted needles of workpieces, which abandons the detection principle of the existing needle detectors. The method of magnetizing and re-magnetizing the workpiece can better eliminate the influence of eddy current

Method used

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  • Detection system and method for broken needle in workpiece
  • Detection system and method for broken needle in workpiece
  • Detection system and method for broken needle in workpiece

Examples

Experimental program
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Effect test

Embodiment 1

[0040] This embodiment provides a needle detector, which can better detect broken needles in workpieces, especially detect broken needles made of strong magnetic materials in workpieces made of weak magnetic materials, and can be better suitable for such as Detect broken needles in aluminum alloy castings such as mobile phone backplanes.

[0041] Such as figure 1 As shown, it includes a needle detector body 110. The needle detector body 110 includes a conveying unit for conveying workpieces to be inspected. The conveying unit is provided with at least one detection unit. module and magnetic detection module.

[0042] The detection unit of the needle detector in this embodiment is equipped with a magnetization module and a magnetization detection module that are independent of each other; this enables the workpiece to be firstly magnetized by the magnetization module when it is running at the conveying unit, because the workpiece is a weak magnetic material Therefore, the att...

Embodiment 2

[0057] This embodiment also provides a needle detector, which differs from Embodiment 1 in that: In this embodiment, in order to overcome the magnetic anisotropy, another setting method of the magnetizing module is provided; wherein, any Each detection unit includes a plurality of magnetization modules, and the plurality of magnetization modules are respectively used to magnetize the workpiece to be inspected in different directions.

[0058] In this embodiment, the relationship between the number and spatial position of multiple magnetization modules arranged at any detection unit should conform to the analysis conclusion in Embodiment 1, that is, the blind zone of magnetization needs to be covered.

Embodiment 3

[0060] On the basis of Embodiment 1 or 2, this embodiment provides a split rack structure.

[0061] see figure 1 , 2 Or 3, the split frame structure in the present embodiment comprises mutually independent feeding frame 120 and conveying frame 130, and feeding frame 120 place is provided with feed channel 121, and conveying frame 130 place is provided with conveying path 131 ; the feeding channel 121 forms a drop in the height direction, the conveying channel 131 is arranged horizontally, and the lower end of the feeding channel 121 is gradually flush with the transmitting channel 131 and extends above the transmitting channel 131 .

[0062] Such as Figure 4 As shown, the feed frame 120 includes a first support member 122 and a first track member 123, and the first track member 123 includes a first connecting plate 211 and a second connecting plate 212 arranged parallel to each other, and the first connecting plate 211 and the second connecting plate 211 A feeding track pl...

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Abstract

The invention relates to the technical field of needle detectors, in particular to a detection system and method for a broken needle in a workpiece. The detection system comprises at least one detection unit and a control unit, wherein the detection units comprise magnetizing modules for magnetizing a to-be-detected workpiece and magnetism detecting modules for detecting whether the large residual magnetism exists in the magnetized to-be-detected workpiece or not; the control unit is used for collecting the detection data at the magnetism detecting modules and carrying out corresponding processing operation to output a corresponding control instruction. By means of the detection system and method for the broken needle in the workpiece, a broken needle in a weak-magnetism metal workpiece can be well detected.

Description

technical field [0001] The invention relates to the technical field of needle detectors, in particular to a detection system and method for interrupted needles of workpieces. Background technique [0002] When the existing needle detector performs detection, there is a fixed-strength magnetic field in the detection area. When ferromagnetic substances enter the magnetic field, the magnetic field strength will be changed there. The data acquisition module can collect the magnetic field strength change signal and send it to the data Processing module, the data processing module can send its processing result to the control circuit, so as to complete the detection work. Based on the above working principle, when the existing needle detector detects weakly magnetic metal workpieces (such as aluminum alloy castings, etc.), the body of the weakly magnetic metal workpiece will generate a large eddy current inside when passing through the detection area. The eddy current will cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08
CPCG01V3/08
Inventor 梁正南王孟哲郑清秋张忠虎
Owner NINGBO JIUZONG INTELLIGENT TECH
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