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Method of monitoring laser welding of plastic

A laser welding and laser technology, which is applied in the monitoring field of laser welding plastics, can solve the problems of lack of online monitoring, reducing production efficiency, and increasing processes in laser plastic welding.

Active Publication Date: 2019-02-19
HANS LASER TECH IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is a lack of effective online monitoring of laser plastic welding, usually through visual observation, or testing of welded products, which increases the follow-up process and reduces production efficiency

Method used

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  • Method of monitoring laser welding of plastic
  • Method of monitoring laser welding of plastic
  • Method of monitoring laser welding of plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Please refer to figure 1 , the present invention provides a kind of monitoring method of laser welding plastic, is used for monitoring the yield rate of plastic welding namely upper plastic layer 40 and lower plastic layer 50 welding, when plastic welding, adopt laser 10 to pass through a collimating lens 20, and then Focusing is carried out through a focusing lens 30, and finally passes through the upper plastic layer 40 and the lower plastic layer 50, and part of the energy is absorbed by the upper plastic layer 40 and the lower plastic layer 50. The monitoring method includes the following steps:

[0044] The laser probe 70 is used to detect the energy value of the laser passing through the lower plastic layer 50; the energy value of the laser is compared with the preset value of the laser energy, and when the energy value of the laser is within the preset value range, the upper plastic layer 40 The welding with the lower plastic layer 50 is successful; when the ener...

Embodiment 2

[0052] Please refer to image 3 , different from Embodiment 1, a monitoring method for laser welding plastics is provided, comprising the steps of:

[0053] A reflective layer 60 is set on the side of the lower plastic layer 50 away from the upper plastic layer 40, and at least one light transmission hole 61 is opened in the reflective layer 60, and the reflective layer 60 reflects the laser light 10 passing through the lower plastic layer 50 to pass through the lower plastic again. Layer 50, upper plastic layer 40, and part of the laser light passes through the light-transmitting hole 61 and passes through the reflective layer 60; the laser probe 70 is used to detect the energy value of the laser light passing through the light-transmitting hole 61; Compared with the preset value, when the energy value of the laser is within the preset value range, the upper plastic layer 40 and the lower plastic layer 50 are successfully welded; when the laser energy value exceeds the preset...

Embodiment 3

[0062] Please refer to image 3 , different from Embodiment 2, a monitoring method for laser welding plastics is provided, comprising the steps of:

[0063] An absorbing layer 60 is arranged on the side of the lower plastic layer 50 away from the upper plastic layer 40, and at least one light-transmitting hole 61 is opened in the absorbing layer 60. The absorbing layer 60 absorbs the laser light 10 passing through the lower plastic layer 50, and a small part of the laser light Pass through the light-transmitting hole 61 to pass through the absorbing layer 60; adopt the laser probe 70 to detect the energy value of the laser light passing through the light-transmitting hole 61; compare the energy value of the laser with the preset value of the laser energy, the energy value of the laser is at When the value is within the preset value range, the upper plastic layer 40 and the lower plastic layer 50 are successfully welded; when the energy value of the laser exceeds the preset val...

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Abstract

The invention discloses a method of monitoring laser welding of plastic. The method of monitoring laser welding of the plastic is used for monitoring the yield of plastic welding. When plastic weldingis conducted, lasers pass through an upper plastic layer and a lower plastic layer. The method of monitoring laser welding of the plastic comprises the following steps that the value of energy of thelasers which go out of the lower plastic layer is detected by a laser probe; the value of the energy of the lasers and the preset value of the energy of the lasers are compared, and the welding of the upper plastic layer and the lower plastic layer is successful when the value of the energy of the lasers is within the range of the preset value; and the welding of the upper plastic layer and the lower plastic layer is poor when the value of the energy of the lasers is beyond the range of the preset value. The method of monitoring laser welding of the plastic is quick and efficient, and can improve the welding efficiency.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a monitoring method for laser welding plastics. Background technique [0002] Transparent plastics are widely used, and transparent plastics need to be welded in many occasions. Currently, lasers are commonly used for welding. Transparent plastics are often used in the medical and automotive fields, which have extremely high requirements on product yields. Products with high sealing requirements, such as automotive oil filters, are likely to cause serious harm if they leak. [0003] At present, there is no effective online monitoring for laser plastic welding, usually by visual observation or testing of welded products, which increases the follow-up process and reduces production efficiency. Contents of the invention [0004] Based on this, it is necessary for the present invention to provide a fast and efficient monitoring method for laser welding plastics. [0005] I...

Claims

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Application Information

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IPC IPC(8): B29C65/16
CPCB29C65/16B29C66/733B29C66/90
Inventor 刘维波黄裕佳黎海权徐友智关欣晟王瑾高云峰
Owner HANS LASER TECH IND GRP CO LTD
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