Crack detection device for plastic part

Abstract

The utility model discloses a crack detection device for a plastic part. The crack detection device comprises a multi-angle positioning seat, a decibel meter and a sound receiving device, the multi-angle positioning seat is fastened and mounted on the side of the press-fitting equipment; the decibel meter and the radio device are fixedly arranged on the multi-angle positioning seat; the decibel meter is electrically connected with the radio device; the position of the sound receiving device is adjusted through a multi-angle positioning seat, and the sound receiving device corresponds to the side of a workpiece pressed by a lower positioning seat and an upper pressing head of the press-fitting equipment. The decibel meter is adopted to recognize different sounds, cracks of the plastic part are indirectly detected through the decibel of the sounds in the press fitting process, and therefore the crack failure mode of the plastic part is detected, and the production efficiency and the detection accuracy are improved. The overall press-fitting quality and the working efficiency of production are simply and effectively improved, and outflow of unqualified products is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection, and relates to a crack detection device for plastic parts. The utility model is particularly suitable for crack detection in the press-fit assembly of plastic parts. Background Art

[0002] In the prior art, cracks may appear on plastic parts during the press-fitting process, and the cracks on the press-fitted plastic parts are not easy to find and identify. If the cracks on the press-fitted plastic parts cannot be identified, the performance of the entire vehicle will be seriously affected. Summary of the invention

[0003] The utility model discloses a crack detection device for plastic parts, which solves the problems in the prior art that cracks appear during press-fitting of plastic parts, are difficult to find and identify, and unqualified products flow out, causing serious impact on the performance of the entire vehicle.

[0004] The utility model comprises a multi-angle positioning seat, a decibel meter and a sound receiving device; the multi-angle positioning seat is fastened and installed on the side of the pressing device; the decibel meter and the sound receiving device are fastened and installed on the multi-angle positioning seat; the decibel meter is electrically connected to the sound receiving device; the multi-angle positioning seat can realize adjustment of multiple degrees of freedom and can provide a wide adjustment space; the sound receiving device is adjusted by the position of the multi-angle positioning seat, corresponding to the side of the workpiece pressed by the lower positioning seat and the upper pressing head of the pressing device; the sound receiving device gathers sound so that the sound does not diverge, eliminates interference from other sounds, and ensures the accuracy of sound collection.

[0005] The decibel meter has multiple sampling limits to enhance the range of sound detection.

[0006] The positive effect of the utility model is that for the identification of cracks, a decibel meter is used to identify the difference in sound, and the cracks of the plastic parts are indirectly detected through the decibel of the sound during the press-fitting process, thereby detecting the crack failure mode of the plastic parts, improving production efficiency and detection accuracy. The overall press-fitting quality and work efficiency of the production are simply and effectively improved, and the outflow of unqualified products is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structure of the utility model;

[0008] Figure 2 This is a schematic diagram of the working state of the utility model;

[0009] In the figure: 1 multi-angle positioning seat, 2 decibel meter, 3 sound receiving device, 4 lower positioning seat, 5 upper pressure head, 6 rubber support, 7 plastic workpiece. DETAILED DESCRIPTION

[0010] An embodiment of the present utility model is described in detail below with reference to the accompanying drawings.

[0011] The plastic part in the embodiment is made by injection molding. There are through holes and blind holes at both ends. During production, the rubber bushing needs to be pressed into the through holes of the plastic part.

[0012] The pressing process is:

[0013] 1. Place the plastic workpiece 7 into the lower positioning seat 4, and place one side of the through hole into the tooling.

[0014] 2. Place the rubber support 6 onto the positioning pin so that the rubber support 6 is placed above the through hole of the plastic workpiece 7.

[0015] 3. The upper pressure head moves downward, and the pressure head contacts the rubber support 6, and quickly presses the rubber support 6 into the through hole of the plastic workpiece 7.

[0016] During the press-fitting process, cracks may appear on plastic parts due to various factors.

[0017] Rubber bushings are made up of two parts: an inner metal hole and a soft rubber middle part; some bushings also have open grooves.

[0018] The utility model is implemented as follows Figure 1 , Figure 2 As shown, it includes a multi-angle positioning seat 1, a decibel meter 2, and a sound receiving device 3; the multi-angle positioning seat 1 is fastened and installed on the side of the pressing equipment; the decibel meter 2 and the sound receiving device 3 are fastened and installed on the multi-angle positioning seat 1; the decibel meter 2 is electrically connected to the sound receiving device 3; the multi-angle positioning seat 1 can realize adjustment of multiple degrees of freedom and can provide a wide adjustment space; the sound receiving device 3 is adjusted by the position of the multi-angle positioning seat, corresponding to the side of the workpiece pressed by the lower positioning seat 4 and the upper pressing head 5 of the pressing equipment; the sound receiving device 3 gathers sound so that the sound does not diverge, eliminates interference from other sounds, and ensures the accuracy of sound collection.

[0019] In the process from when the rubber support 6 contacts the plastic workpiece 7 to when the press-fitting is completed, cracks may appear on the plastic workpiece 7 at any time. From the time when the rubber support 6 contacts the plastic workpiece 7, the decibel meter 2 starts to collect sound and make a judgment. The crack detection of the plastic part is completed with high quality and efficiency.

Claims

1. A crack detection device for plastic parts, characterized in that: It includes a multi-angle positioning seat, a decibel meter, and a sound receiving device; the multi-angle positioning seat is fastened and installed on the side of the pressing equipment; the decibel meter and the sound receiving device are fastened and installed on the multi-angle positioning seat; the decibel meter is electrically connected to the sound receiving device; the sound receiving device is adjusted by the position of the multi-angle positioning seat, corresponding to the side of the workpiece pressed by the lower positioning seat and the upper pressing head of the pressing equipment.

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