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A Method for Precise Machining of Large Thin-wall Rotary Parts

A technology of precision machining and rotary body, applied in the field of precision machining of metal parts, can solve problems such as easy deformation, difficult to guarantee machining accuracy, broken edges, etc., to achieve the effect of improving machining accuracy, reducing labor intensity, and ensuring accuracy

Active Publication Date: 2020-01-10
XIAN NORTH ELECTRO OPTIC TECH DEFENSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that the existing large thin-walled rotary body, especially the large aluminum alloy thin-walled rotary body parts with a thickness-to-diameter ratio of 1:300 or more, is easily deformed and broken, which makes it difficult to guarantee the processing accuracy.

Method used

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  • A Method for Precise Machining of Large Thin-wall Rotary Parts
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  • A Method for Precise Machining of Large Thin-wall Rotary Parts

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Experimental program
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Embodiment 1

[0040] This embodiment provides a method for precision machining of large thin-walled revolving parts, including the following steps:

[0041] Step 1, install the blank of the rotary part on the auxiliary tool 1, correct the rotary part with an angle ruler, and then use the outer circle of the rotary part and the common axis of the hole as the reference, draw the processing lines of each processing surface, and check the rotary body The machining allowance distribution of the part blank, and check the perpendicularity between the outer circle and the bottom surface at the same time, and then select a radial hole to be processed on the side wall of the rotary part blank, and use the radial hole as the process auxiliary reference hole 4;

[0042] Step 2. Align the rotary parts according to the processing lines of each processing surface, clamp the parts with a three-jaw chuck, and at the same time press the parts with a pressure plate on the inner bottom surface, correct the cent...

Embodiment 2

[0055] On the basis of Example 1, the central axis of the process auxiliary reference hole 4 is perpendicular to the central axis of the rotating body ( Figure 7 A-A cross-sectional view centerline), and through the center of any long groove in the inner wall of the rotary part, the diameter of the process auxiliary reference hole 4 is 6mm, and the process auxiliary reference hole 4 in step 1 is a light hole, which is removed in step 5 After burring and tapping, the light hole is processed into a threaded hole and used as a part of the rotary part. Through the setting of the process auxiliary reference hole 4, the correctness of the position of the casting shape and the subsequent machining shape is guaranteed, and different from the existing method, the process auxiliary reference hole 4 processed by the present invention will not be filled in the subsequent process , but reprocessed into threaded holes and directly used as a part of the rotary body to improve machining accu...

Embodiment 3

[0057] On the basis of Example 1, such as figure 1 As shown, the auxiliary device 1 in the step 1 is composed of a backing plate 1.1, a washer 1.2, a support nail 1.3, a lock nut 1.4, an adjustable support nail 1.5, and an adjustment nut 1.6; the backing plate 1.1 is floatingly supported on three On the evenly arranged adjustable supporting nails 1.5, an adjusting nut 1.6 is installed on each adjustable supporting nail 1.5, and four supporting nails 1.3 are evenly distributed on the backing plate 1.1, and each supporting nail 1.3 passes through the backing plate 1.1 and the washer - 1.2 is threadedly connected with lock nut 1.4 after being socketed.

[0058] Such as figure 1 and Figure 5 As shown, the backing plate 1.1 is floatingly supported on the adjustable support nail 1.5 (3 pieces), and the adjustable support nail 1.5 is threadedly connected with the adjustment nut 1.6; the support nail 1.3 passes through the backing plate 1.1 and the washer 1.2 and is socketed, and ...

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Abstract

The invention provides a precision machining method for large thin-walled rotational parts. By arrangement of a process assisting reference hole, correctness of a casting shape and a follow-up machining shape and position is ensured, meanwhile, the process assisting reference hole is not filled in a follow-up process, but is secondarily processed into a threaded hole which directly serves as a part of a rotational body, and thus, the machining precision is improved; and moreover, according to the specificity of the rotational parts to clamping deformation, the invention provides a plurality ofdifferent clamping auxiliary tools which are used in different clamping stages, machining deformation and clamping deformation are controlled effectively by the special auxiliary tools, machining precision is improved, labor intensity is relieved, and the manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of precision machining of metal parts, and in particular relates to a method for precision machining of large thin-walled rotary parts, especially the precision machining of large aluminum alloy ZL101A thin-walled rotary parts with a ratio of wall thickness to diameter of more than 1:300. processing. Background technique [0002] Due to the structural characteristics of light weight and high strength, large thin-walled components have been widely used in military products. Generally, the ratio of wall thickness to diameter is more than 1:20, which is called thin-walled parts. Traditional large-scale thin-walled rotary bodies are prone to clamping deformation and processing deformation during processing, and the general processing accuracy can reach level 9. However, the thin-walled revolving body of cast aluminum blanks is more prone to problems such as deformation, chatter, chipping, chipping, and difficul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 刘永芳杨风军程会民李春
Owner XIAN NORTH ELECTRO OPTIC TECH DEFENSE