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Method for machining circumferential taper holes in irregular spraying pipe casing and composite clamp thereof

A tapered hole processing method and shell technology, applied in the direction of manufacturing tools, metal processing equipment, metal processing machinery parts, etc., can solve the problem of inaccurate alignment of the small end tapered hole 801, which affects the processing quality of the nozzle shell, and the cone surface Problems such as poor apparent quality, to achieve the effect of excellent apparent quality, meeting product design precision requirements, and high processing precision

Active Publication Date: 2013-12-25
湖北三江航天江北机械工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that only the outer taper hole 802 can be processed first. Because the shell is longer and the taper hole is deeper, the tool is seriously lost during processing, and the apparent quality of the taper surface is very poor; Inaccurate, the alignment pin hole is far away from the center, the phenomenon of error amplification is serious, and it is easy to loosen after repeated use, which further causes the problem of inaccurate positioning, and then affects the processing quality of the nozzle shell

Method used

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  • Method for machining circumferential taper holes in irregular spraying pipe casing and composite clamp thereof
  • Method for machining circumferential taper holes in irregular spraying pipe casing and composite clamp thereof
  • Method for machining circumferential taper holes in irregular spraying pipe casing and composite clamp thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] For the special-shaped nozzle shell, three cone holes are distributed in the circumferential direction. The cone holes are composed of a coaxial small end cone hole and an outer cone hole. The cone angle of the outer cone hole is 10° on one side, and the small end cone hole is The angle is 1.5° on one side, the angle between the centerline of the cone hole and the centerline of the nozzle casing is 38°±5′, and the space dimension L between the intersection point of the centerline of the cone hole and the centerline of the nozzle casing and the end face of the small end is 10.2± 0.05mm, the relative angle of the circumferential tapered hole is two places of 128°±5′, and the total length of the shell is 195±0.2mm.

[0041] The processing steps are as follows:

[0042] 1) Rough machining of the nozzle shell: refer to the final size of the product to rough machine each part of the nozzle shell to remove the allowance, process the total length of the shell to 195.6±0.2, and ...

Embodiment 2

[0050] For a special-shaped nozzle shell, three taper holes are distributed in the circumferential direction. The taper holes are composed of a coaxial small-end taper hole and an outer taper taper hole. The cone angle of the cone hole is 1° on one side, the angle between the centerline of the cone hole and the centerline of the nozzle casing is 36°±5′, and the space dimension L between the intersection point of the centerline of the cone hole and the centerline of the nozzle casing is from the small end is 18.5±0.05mm, the relative angles of three taper holes in the circumferential direction are two 132°±5′, and the total length of the shell is 235±0.3mm.

[0051] The processing steps are as follows:

[0052] 1) Rough machining of the nozzle shell: refer to the final size of the product to carry out rough machining on each part of the nozzle shell to remove the allowance. The rough machining shall leave a margin of 2-3mm on one side according to the maximum size of the nozzle...

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Abstract

The invention discloses a method for machining circumferential taper holes in an irregular spraying pipe casing and a composite clamp thereof. The method includes the steps of 1) spraying pipe casing rough machining, 2) spraying pipe casing end face plane grinding, 3) spraying pipe casing semi-finish machining, 4) machining of small end taper holes of the spraying pipe casing, 5) machining of outer taper holes of the spraying pipe casing and 6) position accuracy detection of the circumferential taper holes. The special composite clamp is adopted, a strict clamping and alignment method is adopted to machine the taper holes in the spraying pipe casing, machining accuracy is high, and batch quality is stable. Alignment is required to be conducted only when a taper hole at the first position is machined, the following taper holes are machined in a location mode directly by adjusting a location disc, and the machining efficiency is improved. The space size of the taper holes is ensured through the composite clamp, location accuracy is high, and the requirement of products for space size accuracy can be completely met.

Description

technical field [0001] The invention relates to the processing technology of a nozzle casing of a solid rocket motor ejection system, in particular to a method for processing a peripheral taper hole of a special-shaped nozzle casing and a composite fixture thereof. Background technique [0002] With the development of modern design technology, some types of solid rocket motor nozzle shells are special-shaped nozzle shells that integrate multiple functions such as combustion chambers, convergent nozzles, diffuser nozzles, and mouth seals. Body, the overall structure of the special-shaped nozzle shell is complex, with special-shaped holes, slopes and grooves all over the outer cone surface, most of the dimensions are space dimensions and cannot be set. [0003] As the final actuator of the ejection system, the nozzle casing is a key part of the whole system. like figure 1 , figure 2 As shown, the overall structure of the nozzle shell is conical, and there are three fire-sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H5/04B23Q3/04
Inventor 刘辉夏国辉范海旭周大华钟臻荣谭鹏
Owner 湖北三江航天江北机械工程有限公司
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