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Machining method for large-size thin-wall special-shaped cover body

A processing method and large-scale technology, which are applied in the field of processing large-scale thin-walled special-shaped hoods, to achieve the effects of ensuring profile processing and testing accuracy, meeting cutting processing requirements, and high positioning accuracy

Active Publication Date: 2022-02-18
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to propose a large-size thin-wall special-shaped cover processing method, which solves the problem of positioning during workpiece processing. Difficulty, low processing efficiency and poor processing dimensional accuracy

Method used

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  • Machining method for large-size thin-wall special-shaped cover body
  • Machining method for large-size thin-wall special-shaped cover body
  • Machining method for large-size thin-wall special-shaped cover body

Examples

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Embodiment 1

[0041] In this embodiment, a large-sized thin-walled special-shaped ceramic cover has a blank length of about 1270 mm, a wall thickness of 6 mm, and a non-axisymmetric shape. The following is the specific process of processing method implementation:

[0042] Step (1), design and manufacture special tooling for cutting processing, including fast flexible clamping device on the outer surface and flexible support on the inner surface, reversible quick positioning device, to meet the requirements of fast clamping, adjustable clamping position, quick positioning by flipping, etc. Features.

[0043]Step (2), put the product blank into the tooling. After the blank is scanned, 3D reverse modeling is carried out, and the blank digital model is compared with the product digital model to determine the position of the product relative to the blank. Through the relative positional relationship between the blank and the product digital model, the blank is clamped and fixed on the tooling. ...

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Abstract

The invention relates to a machining method for a large-size thin-wall special-shaped cover body. The machining method comprises the following steps: a tool special for cutting machining is designed and manufactured; 3D reverse modeling is carried out after the blank is scanned; the relative position relation between the blank and the product is determined; according to the comparison relation between the allowance and the removal amount, a machining tool is replaced with a measuring module, the machining profile tolerance and precision of an inner chamber are detected under the condition that a product is not disassembled through online in-situ measurement, and error compensation coping machining is conducted according to a deviation value; and a 90-degree adapter on a vertical milling machine is detached, a spindle of the vertical milling machine is used for milling a second outer profile of the product by taking the end face of the large end of the finish-machined blank as a reference face. The machining method meets the cutting machining requirements of the large-size thin-wall special-shaped ceramic cover body, is simple, convenient and reliable in clamping, high in positioning precision and suitable for popularization and application.

Description

technical field [0001] The invention relates to a method for processing a large-size thin-walled special-shaped cover, and belongs to the technical field of composite material machining. Background technique [0002] The cover body is the key for the aerospace weapon vehicle to break through the black barrier, and its performance directly affects the guidance accuracy of the aerospace weapon vehicle. The cover material is generally made of ceramic materials with excellent mechanical properties and wave-transmitting properties, but ceramic materials are typical difficult-to-machine materials due to their high brittleness, high hardness, and high wear resistance. With the continuous improvement of the guidance capability of aerospace weapons and aircraft, the ceramic cover structure tends to develop in the direction of large-scale, thin-walled, special-shaped and other complex curved surface structures without reference profiling, which makes the following difficulties in work...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C3/00B23P15/00
CPCB23C3/00B23P15/00
Inventor 袁芳相宜宋楠陈旭辉徐亮杨云华王金明韩军严伟容王新永王凯王松
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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