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Composite material conical surface internal thread processing technique

An internal thread processing and composite material technology, applied in the field of thread machining, can solve the problems of unable to clamp products, unable to repair thread pitch and tooth shape, infeasible turning processing method, etc., to achieve stable size, good effect, thread Tooth complete effect

Active Publication Date: 2010-07-07
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the threaded hole is opened on the outer surface of the tapered product, if turning is used, the product cannot be clamped due to the limitation of shape and size, so the turning method is not feasible
Drilling and because the threaded hole is too large, only the bottom hole can reach more than φ90mm, it is impossible to make a large tap for tap tapping, and at the same time, it is impossible to repair the thread pitch and tooth shape by manual clamping.
In short, using traditional thread processing methods, it is impossible to process large internal threads with complete tooth shape, high thread precision and stable dimensions on the composite material cone surface

Method used

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  • Composite material conical surface internal thread processing technique
  • Composite material conical surface internal thread processing technique
  • Composite material conical surface internal thread processing technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Processing M140×1.5 internal threaded hole

[0038] The flow chart of internal thread processing is attached Figure 6 shown.

[0039] 1. Tool selection

[0040] The multi-tooth thread forming tool with diamond tool material is selected, and the wear of the diamond material is small, so that the processed thread size is stable and efficient. as attached figure 1 When milling the thread shown, the form thread milling cutter is selected, but unlike the conventional single-tooth thread boring and milling cutter, this tool is equipped with 2 replaceable form thread inserts on the tool holder. The shape of the blade is as figure 2 As shown, the serration of the blade is exactly the same as the standard thread profile. Guaranteed the processed thread profile standard. At the same time, compared with the single-tooth thread cutter, the processing efficiency is much higher than the former.

[0041] 2. Determine the process and prepare the process execution program

[0...

Embodiment 2

[0063] Processing M100×1.5 internal threaded hole

[0064] 1. Determination of process parameters:

[0065] Take 160mm / min for Vc and substitute it into formula (1) to get n as 509r / min

[0066] Take fz as 0.05 and substitute it into formula (2) to get F as 50.9mm / min

[0067] 2. Processing threaded bottom hole

[0068] (1) Positioning with the metal inner hole of the product 35, drill a φ6mm center hole from the inside of the product 35 outward;

[0069] (2) On the outer surface of the product 35, draw a reference centerline of a φ90mm circle based on the φ6mm hole;

[0070] (3) Based on the reference centerline of the φ90mm circle, expand φ6mm to φ90 +2.0 0 mm;

[0071] (4) Use the dial indicator clamped on the machine tool spindle, from φ90 +2.0 Align the center of the metal step hole of the product 35 in the hole of mm;

[0072] (5) Take the center position of the alignment as the center of the circle to make a bottom hole φ98.5 +0.10 0 mm.

[0073] All the othe...

Embodiment 3

[0075] Processing M120×1.5 internal threaded hole

[0076] 1. Determination of process parameters:

[0077] Take 180mm / min for Vc and substitute it into formula (1) to get n as 478r / min

[0078] Take fz as 0.08 and substitute it into formula (2) to get F as 76.48mm / min

[0079] 2. Processing threaded bottom hole

[0080] (1) Positioning with the metal inner hole of the product 35, drill a φ6mm center hole from the inside of the product 35 outward;

[0081] (2) Draw a reference center line of a φ110mm circle on the outer surface of the product 35 based on a φ6mm hole;

[0082] (3) Expand φ6mm to φ110 based on the reference center line of φ110mm circle +2.0 0 mm;

[0083] (4) Use the dial indicator clamped on the machine tool spindle, from φ110 +2.0 Align the center of the metal step hole of the product 35 in the hole of mm;

[0084] (5) Take the center position of the alignment as the center of the circle to make a bottom hole φ118.5 +0.10 0 mm.

[0085] All the othe...

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PUM

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Abstract

The invention relates to an internal thread processing technology of a composite material conical surface, which comprises the following steps: a cutter is selected; the technological parameter of the cutter is set; a clamping tooling is manufactured; a thread bottom underport is processed; a screw thread is processed, and the like. The invention adopts the special clamping tooling which solves the difficult problems that a large internal thread can not be processed on the composite material conical surface and begins to be used in practice with excellent effect; the invention adopts the special processing technology to ensure that the processed thread has complete profile and has no defects of profile drop, profile collision, and the like, thereby the position of a processed thread hole is precise; the invention adopts a numerical control milling to process the internal thread, which has high processing precision, and the processed thread has high precision and stable size; the invention adopts a method that an initial processing position is preset, the positioning precision is high during the processing, thereby avoiding the phenomenon of wrong buckling the threads due to repeated cutter feedings during the thread processing.

Description

technical field [0001] The invention relates to a process for processing an internal thread on a cone surface of a composite material, in particular to a process for processing an internal thread on a cone surface of a large composite material, and belongs to the field of thread machining. Background technique [0002] Ordinary threads are generally formed by drilling, tapping or thread turning. Drilling and tapping is to process threads by taps, and turning is to process threads by forming thread turning tools. Composite products integrally formed by isostatic pressing are required to process four internal threads larger than M100×1.5 on its conical outer surface. Since the threaded hole is opened on the outer surface of the tapered product, if turning is used, the product cannot be clamped due to the limitation of shape and size, so the turning method is not feasible. Drilling is also because the threaded hole is too large, and only the bottom hole reaches more than φ90m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23G1/32B23G1/44
Inventor 雷建华李昕孔繁良陈良赵建设郑世平
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH