Ultra-precision machining method of cerium lanthanum alloy

A technology of ultra-precision machining and cerium-lanthanum alloy, which is applied in the field of ultra-precision machining of cerium-lanthanum alloy, can solve problems such as difficulty in meeting ultra-precision machining requirements of cerium-lanthanum alloy, affecting surface machining accuracy, and difficulty in stable cutting, so as to improve the cutting surface. The effect of quality, improving machining accuracy and stable machining process

Active Publication Date: 2019-11-08
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its coarse crystal grains, low ignition point, and high chemical activity, cerium-lanthanum alloys are often accompanied by fire (production of processing sparks 20) and oxidation phenomena during the cutting of cerium-lanthanum alloys, which makes it difficult to achieve stable cutting, and ultimately affects its surface processing. Accuracy, surface burns, and oxidation introduce new impurities, and even lead to the scrapping of the entire workpiece (the surface oxide layer 21 is formed on the upper surface, and the subsurface damage layer 22 is formed on the lower surface), which is difficult to meet the ultra-precision machining requirements of cerium-lanthanum alloys.

Method used

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  • Ultra-precision machining method of cerium lanthanum alloy

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Embodiment 1

[0033] Such as figure 2 , image 3 As shown, an ultra-precision machining method of a cerium-lanthanum alloy of the present invention, the thickness of the cerium-lanthanum alloy used in this embodiment is about 5mm flake sample. The chemical properties of the cerium-lanthanum alloy are active, and the surface is easily oxidized. This example does not provide any anti-oxidation protection, so the surface of the sample has produced an oxide layer before processing. Moreover, the cerium-lanthanum alloy has not been subjected to any special treatment before processing, and its crystal grains are coarse, on the order of 200 μm. Select a cavitation jet system consisting of a water storage tank, feed pump, pressure regulating valve, cavitation container, nozzle, etc. to perform step 1). Select a three-axis ultra-precision single-point diamond lathe to perform step 2). Before processing, the equipment should be transformed so that it can meet the technological scheme provided by ...

Embodiment 2

[0040] This embodiment is based on embodiment 1, and the difference with embodiment 1 is:

[0041] The cavitation jet process parameters are selected from the parameter range provided by the patent of the present invention, specifically: the nozzle diameter is 2.5mm, the outlet flow area pressure is 30MPa, the nozzle moving speed is 6mm / min, the target distance is 15mm; the cutting depth is 1um, the spindle The rotational speed is 450rpm, and the feed rate is 6mm / min.

Embodiment 3

[0043] This embodiment is based on embodiment 1, and the difference with embodiment 1 is:

[0044]The cavitation jet process parameters are selected from the parameter range provided by the patent of the present invention, specifically: the diameter of the nozzle is 1.5mm, the pressure of the outlet flow area is 20MPa, the moving speed of the nozzle is 1mm / min, the target distance is 12mm, the cutting depth is 5um, the spindle The rotational speed is 450rpm, and the feed rate is 1mm / min.

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Abstract

The invention discloses an ultra-precision machining method of cerium-lanthanum alloy. The method comprises the following steps of, (1) Carrying out nanocrystallization treatment on the surface of thecerium lanthanum alloy : a nozzle is utilized to impact the surface of cerium-lanthanum alloy by cavitation jet bubbles, generating plastic deformation of the crystal, and realizing crystal pulverization on the surface of the material to nano-scale; and (2) Carrying out trace cutting on the surface of the cerium-lanthanum alloy subjected to nanocrystallization treatment on the surface by adoptinga single-point diamond machining tool and a machining process. According to the method disclosed by the invention, the processing stability of the cerium-lanthanum alloy can be improved; meanwhile, spontaneous combustion is inhibited, and the surface and sub-surface damage generated when the cerium-lanthanum alloy is subjected to traditional precise cutting is reduced; a compact layer is generated, the oxidation corrosion process is hindered, and the surface cleanness is improved.

Description

technical field [0001] The invention relates to the technical field of machining, in particular to an ultra-precision machining method for a cerium-lanthanum alloy. Background technique [0002] Due to the special material of cerium-lanthanum alloy, it is difficult to obtain high surface precision in its ultra-precision machining, prone to surface / subsurface damage, and low cleanliness. [0003] At present, most of the processing of cerium-lanthanum alloys directly utilizes ultra-precision machining tools (such as figure 1 shown) for processing. However, due to its coarse crystal grains, low ignition point, and high chemical activity, cerium-lanthanum alloys are often accompanied by fire (production of processing sparks 20) and oxidation phenomena during the cutting of cerium-lanthanum alloys, which makes it difficult to achieve stable cutting, and ultimately affects its surface processing. Accuracy, surface burns, and oxidation introduce new impurities, and even cause the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P17/04C21D7/06B23B1/00
CPCB23B1/00B23P17/04C21D7/06
Inventor 阳红孙守利刘有海张敏戴晓静杨光伟尹承真宋珂炜
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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