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A processing method and fixture for a large thin-walled cabin section shell

A processing method and shell technology, which is applied in the direction of manufacturing tools, metal processing equipment, metal processing machinery parts, etc., can solve problems affecting product stability, long zero point setting time, and difficulty in clamping and alignment, so as to achieve small processing deformation , Ensure the uniformity of wall thickness and improve the processing efficiency

Active Publication Date: 2019-07-26
航天科工哈尔滨风华有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The large thin-walled cabin shell is a mechanically processed part with a complex structure. The traditional processing method has large deformation and poor wall thickness consistency, which affects the stability of the product during use.
Clamping and alignment are difficult, zero point setting takes a long time, the stability of placing the special-shaped end downward during CNC machining is poor, the vibration is large and the efficiency is low during machining

Method used

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  • A processing method and fixture for a large thin-walled cabin section shell
  • A processing method and fixture for a large thin-walled cabin section shell

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] combine figure 1 As shown, the large thin-walled special-shaped casting cabin shell disclosed in this embodiment is an important product on a certain type of missile, and is the key to ensure reliable connection and separation of the missile during ground lifting, transportation, and booster flight. The front end of the shell is a non-circular special-shaped section, the outer diameter of the outline is 600mm-700mm, and the rear end is a circular end frame with a diameter of φ1400mm. The taper is about 20°, and the typical wall thickness is 3mm.

[0029] The processing method of the above-mentioned large thin-walled special-shaped cabin shell comprises the following steps:

[0030] The first step is to reserve a reference boss on the shape of the shell when casting the shell, rough machining the marking benchmark, level the front and rear end faces of the she...

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Abstract

The invention relates to a processing method of a large-scale thin-wall cabin shell body. The processing method comprises the steps of 1, reserving a criterion boss on the shape of the shell body when casting the shell body, conducting rough machining on the lineation criterion, leveling a front and back end surfaces of the shell body, and conducting rough machining on the front and back end surfaces of the shell body; 2, conducting rough machining on shape and an inner cavity of the shell body according to the processing criterion in the step 1, conducting aging treatment after the rough machining, and detecting form and location tolerance deformation quantities of the shell body before and after the aging treatment; 3, analyzing remaining quantities of various parts of specially shaped end of the shell body according to a deformation rule of the shell body, judging whether there is a need to borrow quantity, finishing semi-finishing on the shape and the inner cavity of the shell body, and conducting aging treatment after the semi-finishing; 4, detecting the form and location tolerance deformation quantities before and after the aging treatment of the shell body in the step 4, further figuring out the deformation rule of the shell body, and finishing finish machining of the shell body; 5, finally detecting all the sizes of the shell body and storing the shell body into a storage after the shell body is qualified. The invention also relates to a clamp used according to the method. The processing method can improve sharply processing efficiency, guarantee the quality of a product, causes a small processing deformation, and can guarantee the homogeneity of shell wall thickness.

Description

technical field [0001] The invention relates to the technical field of machining of aerospace equipment, in particular to a machining method for a large thin-walled compartment shell, and also to a fixture applied based on the machining method. Background technique [0002] With the continuous development of aerospace technology, thin-walled casting cabin parts have been widely used in various types of missile weapons and equipment, which have the characteristics of light weight, material saving, compact structure, etc. The trend of structural transformation to heteromorphic structures. The inner and outer surfaces of the special-shaped cabin are composed of irregular curved surfaces, which have the characteristics of grid structure, thin wall, large taper and poor rigidity. [0003] The large thin-walled cabin shell is a mechanically processed part with complex structure. The traditional processing method has large deformation and poor wall thickness consistency, which aff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B23Q3/06
CPCB23P15/00
Inventor 陈鹏强刘明金守荣王相理
Owner 航天科工哈尔滨风华有限公司
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