The Deep and Narrow Groove Precise Machining Method of Flame Tube Thin-walled Parts

A thin-walled part, precision machining technology

Active Publication Date: 2018-07-20
CHINA HANGFA SOUTH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method for precision machining of deep and narrow grooves of thin-walled parts of flame cylinders to solve the technical problems of cutting tools, deformation of groove width and low efficiency in the process of processing deep and narrow grooves of thin-walled parts of flame cylinders.

Method used

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  • The Deep and Narrow Groove Precise Machining Method of Flame Tube Thin-walled Parts
  • The Deep and Narrow Groove Precise Machining Method of Flame Tube Thin-walled Parts

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specific Embodiment approach

[0047] Considering that the material of the part is GH3044, which is a nickel-based solid solution alloy, the hardness HBd≥3.6, and the machining performance is poor, the appropriate cutting amount (cutting speed, feed rate, back cutting amount) is determined based on the tool model and material characteristics. )scope;

[0048] Considering that the slot width of the part is required to be 1.5 (+0.1, 0) mm, use a slot cutter with a width of 1.5 mm and a tool tip arc R0.1 for rough machining, and use a slot with a width of 1.5 mm and a tool tip arc R0.75 Knife for finishing.

[0049] 1. Within the allowable feed range, use the maximum feed speed to cut into the groove depth of 1.5mm. The iron chips formed at this time are thick and hard, which can realize automatic chip removal and ensure a certain processing efficiency;

[0050] 2. From the groove depth of 1.5mm to the position of 3 / 4 groove depth, use medium feed for processing, and the iron filings formed at this time are s...

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Abstract

The invention discloses a precision machining method for a deep and narrow groove of a flame tube thin-walled part. The precision machining method comprises the following steps that a, a matched rough machining grooving cutter, a matched finish machining grooving cutter and matched machining parameters are selected according to materials of the part and design dimensions of the length, the width and the depth of the to-be-machined deep and narrow groove in the part; b, an initial position of the to-be-machined deep and narrow groove is cut by a first depth, continuous feeding is conducted at an allowable maximum feeding speed, and an allowance is reserved; c, downward machining is continued without retracting, a second depth is reached through cutting, continuous feeding is continuously conducted at a medium feeding speed, and an allowance is reserved; d, downward machining is continued without retracting, a third depth is reached through cutting, machining is continuously conducted at a minimum feeding speed, and an allowance is reserved; and e, the finish machining grooving cutter is a profiling arc groove cutter and is used for completing finish machining to meet the final dimensional requirements.

Description

technical field [0001] The invention relates to the technical field of aero-engine parts processing, in particular to a deep and narrow groove precision machining method for thin-walled parts of a flame tube. Background technique [0002] Aeroengine flame cylinder parts have large diameter and thin wall thickness. There are multi-stage air film cooling grooves on the body. The main characteristics of this type of air film grooves are narrow width and deep depth. We collectively call them deep and narrow grooves. Considering the particularity of the structure of the air film groove, in order to ensure the processing quality of the parts and ensure that the groove width is qualified, there are generally two traditional processing methods: [0003] The first method: use ordinary trucks to dig grooves, and manually control the relevant dimensions. There are several problems with this method: people with high operating skills are required to operate; the welded groove cutter use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B5/00
CPCB23B5/00B23B2220/12
Inventor 赵丹丹柏慧赵宇平马滔邓春珍
Owner CHINA HANGFA SOUTH IND CO LTD
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