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Ultraprecise turning forming method for complex curved face of fragile material

A technology for complex curved surfaces and brittle materials, applied in the field of turning processing, can solve problems such as low processing efficiency, easy embedding of abrasives, and failure of optical functions, and achieve the effects of reducing difficulties, avoiding brittle cracks, and high surface quality

Active Publication Date: 2017-09-08
TIANJIN UNIV
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Problems solved by technology

However, the grinding method uses tiny abrasive particles to repeatedly grind the optical device into shape, the processing efficiency is low, and for soft and brittle materials, abrasives are easy to embed into the interior to form impurities and defects, which in turn cause the failure of optical functions

Method used

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  • Ultraprecise turning forming method for complex curved face of fragile material
  • Ultraprecise turning forming method for complex curved face of fragile material
  • Ultraprecise turning forming method for complex curved face of fragile material

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Embodiment Construction

[0020] Aiming at the processing and forming of complex curved surfaces of brittle materials, the present invention proposes a fast tool servo turning method, which adds fast servo motion to the traditional turning, and adds one-dimensional fast motion to the tool motion, that is, the tool can make a small stroke along the sagittal height direction (Z direction) High-frequency reciprocating motion, this method is also called fast knife servo. Adding fast tool servo-assisted machining in the turning process can add the corresponding non-rotational amount on the basis of the surface of revolution, so as to generate complex surfaces with non-rotational symmetry. When the fast tool servo system has a high frequency response, it can adapt to the high-speed spindle speed, thereby ensuring the rapid cutting and forming of complex curved surfaces.

[0021] The specific implementation is as follows:

[0022] 1. Optimize the design of brittle materials near-revolving complex surfaces ba...

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Abstract

The invention relates to an ultraprecise turning forming method for a complex curved face of a fragile material. The ultraprecise turning forming method comprises the steps that according to the optimal principle of the optical performance, the complex curved face approaching rotation of the fragile material is designed; face shape decomposing is carried out on the designed curved face according to a rotating part and a non-rotating part, and the non-rotating degree of a non-rotating face acquired from decomposing is calculated; a sharp knife servo turning system is erected, and a processing tool is arranged on a rapid servo mechanism to form a sharp knife servo mechanism; appropriate cutting parameters and tool geometrical parameters are designed according to the sharp knife servo turning process characteristics and the cutting performance of the material; based on the processing parameters and the tool geometrical parameters, rotating part and non-rotating part processing path generation is carried out, path compensation is carried out before processing, and after compensation is conducted, a processing surface is formed after a tool outline passes through the path; and a machined workpiece is arranged on a machine tool main shaft, and sharp knife servo turning is carried out.

Description

technical field [0001] The invention relates to a turning processing method. Background technique [0002] Optical complex surfaces are non-rotationally symmetric optical surfaces whose surfaces vary freely. The application fields of optical complex surfaces are extremely wide, covering multiple interdisciplinary fields such as new energy, aerospace, lighting imaging, and bioengineering. Compared with traditional optical surfaces, optically complex curved surfaces have superior performance, and its large degree of freedom can effectively control light propagation, which can help expand the field of view and reduce phase difference and distortion. At the same time, for multi-optical device systems, adding complex The curved surface can reduce the volume and weight of the system while improving the imaging quality of the system. [0003] Brittle materials (such as semiconductor materials, optical crystal materials, etc.) have excellent ultraviolet or infrared transmittance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28D5/00B28D7/00
CPCB28D5/00B28D5/0058
Inventor 张效栋房丰洲李泽骁
Owner TIANJIN UNIV
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