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Laminated structure hole manufacturing online monitoring self-adaptive machining method

A technology of laminated structure and processing method, which is applied in the direction of manufacturing tools, metal processing, metal processing equipment, etc., can solve problems such as difficulty in ensuring the quality of hole making and the impact of tool wear, and achieve the goal of improving quality and hole processing efficiency and reducing costs Effect

Inactive Publication Date: 2015-01-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual carbon fiber reinforced composite material / alloy laminated hole making, it is often used to automatically change the parameters according to the force change measured by the dynamometer during the drilling or helical milling process. This method is often measured in the process of processing. When the parameters are changed, the transition zone of the laminated structure has been crossed, which is likely to have a great impact on tool wear, and it is difficult to ensure the quality of hole making

Method used

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  • Laminated structure hole manufacturing online monitoring self-adaptive machining method
  • Laminated structure hole manufacturing online monitoring self-adaptive machining method

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Experimental program
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Effect test

Embodiment approach

[0017] As a preferred embodiment of the present invention, the ultrasonic thickness measurement method specifically includes the following steps:

[0018] (a) Fix the ultrasonic probe 4 in close contact on the bottom surface of the laminated structure of the carbon fiber reinforced composite material and the alloy material coated with the couplant 6, so as to ensure that the ultrasonic probe is always relative to the made hole; the couplant is available on the market , light engine oil can be used.

[0019] (b) Excite the ultrasonic probe to emit ultrasonic waves, the ultrasonic probe receives the reflected ultrasonic signal B at the hole-forming position of the laminated structure that the bottom end of the cutter arrives at and the reflected ultrasonic signal A at the material interface in the laminated structure, and then the received ultrasonic signal The signal is output to the transmitting, receiving and signal processing system and then output to the single-chip microco...

Embodiment 1

[0024] (1) When the hole-making tool 3 installed on the CNC machine tool is used to make holes in the laminated structure of carbon fiber reinforced composite material 2 and alloy 1, the layered structure formed by the bottom end of the hole-making tool is measured by ultrasonic thickness measurement. The distance value between the position and the material interface in the laminated structure, and then transmit the distance difference signal to the control system of the CNC machine tool where the hole-making tool is installed;

[0025] The ultrasonic thickness measurement method specifically includes the following steps:

[0026] (a) Fix the ultrasonic probe 4 in close contact on the bottom surface of the laminated structure of the carbon fiber reinforced composite material and the alloy material coated with the couplant 6, so as to ensure that the ultrasonic probe is always relative to the made hole; the couplant is available on the market , light engine oil can be used.

...

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Abstract

The invention discloses a laminated structure hole manufacturing online monitoring self-adaptive machining method. The laminated structure hole manufacturing online monitoring self-adaptive machining method comprises the following steps that (1), a hole manufacturing cutter installed on a numerical control machine tool is adopted to manufacture holes in laminated structures of carbon fiber reinforced composite materials and alloy materials, the distance between the laminated structure hole forming position reached by the bottom end of the hole manufacturing cutter and the material interface in the laminated structures is measured through an ultrasonic thickness measurement method, and then the distance signal is transmitted to a control system of the numerical control machine tool with the hole manufacturing cutter after being processed; (2), the control system of the numerical control machine tool compares the received distance signal with a set value 0, if the distance value is greater than 0, the control system of the numerical control machine tool still outputs an initial control signal, and if the distance value is 0, the control system of the numerical control machine tool outputs a new preset control signal to change the spindle rotation speed and feeding speed of the hole manufacturing cutter. By the adoption of the method, the laminated assembly hole manufacturing quality and hole machining efficiency can be improved, and the cost is lowered.

Description

technical field [0001] The invention relates to an on-line monitoring and self-adaptive processing method for laminated hole making, and mainly relates to a self-adaptive processing method for laminated structure hole making of carbon fiber reinforced composite material / alloy material based on online monitoring. Background technique [0002] As composite materials and titanium alloys, aluminum alloys and other metal materials and their laminated structures have greatly improved in aircraft structures, a large number of holes are required for riveting or bolting during aircraft assembly. According to statistics, an F-22 fighter 14,000 assembly holes need to be processed on the wing, and more than 3 million connection holes need to be processed on a B747 aircraft. The processing quality of aircraft assembly holes is directly related to the quality of aircraft assembly and the life of the aircraft. For the integrated connection of composite materials and titanium alloys, how t...

Claims

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Application Information

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IPC IPC(8): B23B35/00B23Q15/12
CPCB26F1/16
Inventor 秦旭达刘振旺李皓田利成李永行赵庆刘婕
Owner TIANJIN UNIV
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