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Prediction distance follow-up type laser processing device

A laser processing, follow-up technology, applied in laser welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems affecting processing efficiency, light intensity signal attenuation, measurement speed drop, etc., to optimize processing efficiency and detection results. Reliable, cost-saving effects

Pending Publication Date: 2022-03-11
NANJING TRIZ INST OF LASER APPL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used method is to install a capacitive sensor on the laser processing head. By detecting the capacitance and adjusting the height of the laser processing head to control the constant capacitance value, the distance between the processing head and the workpiece is consistent, but this method is only applicable to metal materials; Han’s Laser A method based on installing an auxiliary optical measurement device at the position of the processing head is proposed, which can be combined with adjusting the Z-axis adjustment platform to find the best processing position, which is suitable for the processing of various materials. However, this method can only measure the reflected light intensity signal. If The position of the processing surface above or below the processing focus will cause the light intensity signal to attenuate, so the distance information cannot be obtained directly from a single light intensity signal, and it needs to be combined with Z-axis scanning, resulting in a decrease in measurement speed or requiring an expensive high-speed precision motion platform In order to make the detection speed match the laser processing efficiency; in addition, most of the existing equipment has the same position as the distance measuring unit and the processing, which will affect the processing efficiency while optimizing the processing position

Method used

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  • Prediction distance follow-up type laser processing device
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  • Prediction distance follow-up type laser processing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The invention provides a predictive distance follow-up laser processing device, see figure 1 and figure 2 , including a laser processing unit and an optical detection unit, and also includes a rotating device 4, the rotating device 4 is provided with a laser processing unit and an optical detection unit, which drives the laser processing unit and the optical detection unit to rotate 360° around the main shaft 14; the laser processing unit is used After emitting the laser beam 1 and converging into a processing spot 15, the optical detection unit includes a detection light source 2, the detection light source 2 is used to emit a detection spot 16, and the detection spot 16 reaches the processing surface 17 and then returns to the spectrometer 3 for detecting the distance; processing The light spot 15 is emitted from the light exit point 16, and the detection light spot 16 is emitted from the light exit point 10. There is a centrifugal distance D1 between the light exit ...

Embodiment 2

[0024] For the difference between this embodiment and embodiment 1, see image 3 , wherein the first synchronous wheel 4-2 and the second synchronous wheel 4-4 in the rotating device are replaced by the first gear 4-6 and the second gear 4-7, the first gear 4-6 and the second gear 4-7 meshing, the first gear 4-6 is driven to rotate by the second gear 4-7.

Embodiment 3

[0026] For the difference between this embodiment and embodiment 1, see Figure 4 , wherein the motor is replaced with a motor 4 with a hollow shaft, the hollow shaft 4-8 of the motor is directly fixedly connected with the rotating device, and the optical fiber one 5 and the optical fiber four 12 can directly pass through the hollow shaft of the motor. The motor directly drives the rotating device to do 360-degree rotating motion. In addition, other mechanical transmission methods can also be used in the rotating device of the present invention, such as worm gear transmission.

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Abstract

The invention discloses a distance prediction follow-up type laser processing device which comprises a laser processing unit and an optical detection unit and further comprises a rotating device, and the laser processing unit and the optical detection unit are arranged in the rotating device. The rotating device drives the laser processing unit and the optical detection unit to rotate by 360 degrees around the main shaft; the rotating device can rotate by 360 degrees, the detection light spot is always controlled to be arranged in front of the laser processing light spot in the processing direction, therefore, prediction of the processing position can be achieved, the detection result is more reliable, and meanwhile optimization of the processing efficiency is facilitated.

Description

technical field [0001] The invention relates to a predictive distance follow-up laser processing device, which belongs to the technical field of laser processing. Background technique [0002] In the field of laser precision cutting and processing, it is necessary to precisely control the position of the laser focus spot on the surface of the workpiece, otherwise it will affect the quality and efficiency of processing. At present, the commonly used method is to install a capacitive sensor on the laser processing head. By detecting the capacitance and adjusting the height of the laser processing head to control the constant capacitance value, the distance between the processing head and the workpiece is consistent, but this method is only applicable to metal materials; Han’s Laser A method based on installing an auxiliary optical measurement device at the position of the processing head is proposed, which can be combined with adjusting the Z-axis adjustment platform to find t...

Claims

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Application Information

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IPC IPC(8): B23K26/064B23K26/046B23K26/082B23K26/70B23K26/38
CPCB23K26/064B23K26/046B23K26/082B23K26/702B23K26/38
Inventor 孔兵赵全忠徐冰
Owner NANJING TRIZ INST OF LASER APPL TECH CO LTD