Titanium alloy thin-wall structure precision milling surface state robustness process control method

A thin-walled structure and surface state technology, applied in metal processing, metal processing equipment, automatic control devices, etc., can solve the problem of poor stability in the processing process, difficulty in meeting the design requirements for the size and shape accuracy of thin-walled parts, and tissue damage. and other issues to achieve the effect of improving the size and shape accuracy

Active Publication Date: 2022-01-07
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] Titanium alloy thin-walled structures are generally processed by milling. During the cutting process of thin-walled structural parts, the processing system has the characteristics of strong time-varying and weak rigidity. The complex coupling effect of deterministic process fac

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  • Titanium alloy thin-wall structure precision milling surface state robustness process control method
  • Titanium alloy thin-wall structure precision milling surface state robustness process control method
  • Titanium alloy thin-wall structure precision milling surface state robustness process control method

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[0034] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] The problem of surface integrity of titanium alloy thin-walled structural parts is caused by improper control of cutting process parameters, resulting in severe thermal and mechanical coupling. Therefore, the surface integrity of thin-walled structural parts is not only affected by controllable process parameters such as milling speed and feed per tooth, but also by process variables such as workpiece and tool contact state, tool vibration, and workpiece deformation.

[0036] When the input variables such as cutting speed and feed rate are fixed, the fluctuation of workpiece state, tool state, interface state such as cutting force and cutting temperature, and machining vibration over time will cause surface roughness, residual stress, microhardness, etc. The output fluctuates. In actual production, the output is generally controlled to f...

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Abstract

The invention discloses a titanium alloy thin-wall structure precision milling surface state robustness process control method. The titanium alloy thin-wall structure precision milling surface state robustness process control method comprises the following steps of carrying out a titanium alloy milling test based on a primary milling process parameter range of a titanium alloy thin-wall structural member; measuring residual stress parameters, obtained by the milling test, of the titanium alloy thin-wall structural member; establishing a first relation model according to milling parameters and the residual stress parameters of the titanium alloy thin-wall structural member; maximizing the residual stress distribution envelope area in the first relation model as a target function and solving to obtain a milling robustness process parameter domain of the titanium alloy thin-wall structural member; and machining the titanium alloy thin-wall structural member based on the milling robustness process parameter domain. According to the method, the sudden change of the surface state of the structural member due to the action of uncontrollable factors in machining is compensated by adjusting the controllable process parameters, it is guaranteed that the fatigue performance of the structural member reaches the expected effect, and the size and form and position precision of the titanium alloy thin-wall structural member is improved.

Description

technical field [0001] The invention belongs to the technical field of milling processing of titanium alloy thin-walled structures, and in particular relates to a robust process control method for precision milling surface states of titanium alloy thin-walled structures. Background technique [0002] Thin-walled structures are structures composed of thin plates, thin shells, and slender rods, which can withstand larger loads with less weight and less material. Titanium alloy thin-walled structure is a complex part processed from titanium alloy material. [0003] Titanium alloy thin-walled structures are generally processed by milling. During the cutting process of thin-walled structural parts, the processing system has the characteristics of strong time-varying and weak rigidity. The complex coupling effect of deterministic process factors will make it difficult for the size and shape accuracy of thin-walled parts to meet the design requirements. Moreover, machining tool ma...

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Application Information

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IPC IPC(8): B23C3/00B23Q15/00
CPCB23C3/00B23Q15/00
Inventor 沈雪红张定华谭靓姚倡锋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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