Nano-imprinting forming and pressure-print hole-forming method of metal sheet

Abstract

The invention discloses a nano-imprinting forming and pressure-print hole-forming method of a metal sheet. The method comprises the steps of grinding a taper angle a and a tip blunt circle radius R of a diamond pressure head according to indexes phi of different formed holes in the bottom of the metal sheet; judging a specific position, being contacted with the upper surface of the metal sheet, of the tip end of the diamond pressure head by utilizing a measurement device; controlling the diamond pressure head to press continuously through a Z-direction nano servo lifting platform, ensuring a material inside the metal sheet to do lateral plastic flow motion under the combined effect of the taper angle of the pressure head and a bottom hard glass substrate, forming the holes with the taper being the taper angle alpha, and breaking the bottoms of the holes to form a large hole; and accurately judging the hole-forming signal characteristic of the bottom of the thin metal sheet pressed by the diamond pressure head, and feeding back a continuous pressing quantity delta h of the Z-directional nano servo lifting platform.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic leak detection, and relates to a method for nano-press forming and pressing through of a metal sheet to form holes. Background technique [0002] Ultrasonic leak detection technology uses ultrasonic sensors to detect the ultrasonic waves emitted when gas or liquid passes through a slit, so as to find out the leak or the source of ultrasonic waves. It is widely used in leak detection fields such as container leakage, pipeline cracks, bearing wear, partial discharge, operating equipment failure, vibration, etc., and its role is very important. The premise of using it to detect the target is to accurately calibrate, correct or verify the ability of the ultrasonic tester to test the signal. Among them, a special calibration sample is used in the calibration technology device, which is a thin metal sheet (copper, stainless steel) of a certain thickness with a micropore ≤ 5 μm (sometimes ultra-micro...

AI Technical Summary

Problems solved by technology

The large depth-to-diameter ratio (up to 1000) ultra-micropores on the calibration sample cannot be prepared in China at present, and can only rely on foreign imports

In foreign countries, ultra-fast lasers are mainly used to realize ultra-micro-hole processing. The focusing lens of the laser is manufactured with high precision, which can focus the laser spot to less than 1 micron, but it is not yet possible in China.

The specific processing technology information cannot be accurately known due to the confidentiality of commercial technology

This type of sample is affected by various test environments in China. During long-term repeated use, the micropores are often blocked due to the influence of gas source impurities in the test equipment, making it impossible to continue to use and can only be replaced. Therefore, this type of sample consumable parts

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