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Method for machining slotted holes on carbon fiber laminated boards

A technology of carbon fiber layer and carbon fiber, which is applied in the field of processing slots on carbon fiber laminates, and can solve the problems of easy delamination, burns, and splitting of carbon fiber laminates

Active Publication Date: 2012-10-31
HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a method for processing slot holes on carbon fiber laminates, which solves the problems of easy delamination, splitting and burns of carbon fiber laminates existing in existing milling and drilling methods, so as to improve the processing accuracy of carbon fiber composite products, Reduce surface roughness

Method used

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  • Method for machining slotted holes on carbon fiber laminated boards
  • Method for machining slotted holes on carbon fiber laminated boards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, for processing rectangular slots in flat carbon fiber laminates, including clamping steps, milling steps and post-processing steps;

[0034] (1) Clamping steps:

[0035] Such as figure 1 As shown, backing plates are arranged on the upper and lower sides of the carbon fiber laminate and clamped; in the figure, the carbon fiber laminate 1, the upper backing plate 2 and the lower backing plate 3 are all aluminum plates, which are fixed and tightened with bolts 4;

[0036] (2) Milling process steps:

[0037] Carbide cutters are used. When milling the opening, the spiral lower cutter is used, the spindle speed is 6000r / min, the feed speed is 3000mm / min, the cutting depth is 1mm, and the dry cutting conditions are used; milling and processing from one side of the carbon fiber laminate To the required size; the geometric parameters of the hard alloy tool: rake angle γ = 12°, rear angle α = 6°, the shape of the knife tip is an arc edge, the radius of the arc of ...

Embodiment 2

[0040] Embodiment 2 is used to process elliptical holes on irregularly curved carbon fiber laminates, including clamping steps, milling steps and post-processing steps;

[0041] (1) Clamping steps:

[0042] Paste scotch tape on the milling parts on the upper and lower sides of the carbon fiber laminate or around the drilling parts;

[0043] (2) Milling process steps:

[0044] Adopt artificial diamond cutter, when milling processing opening, adopt spiral lower cutter, spindle speed 8000r / min, feed speed 4000mm / min, cut depth 0.5mm, dry cutting condition; The geometry of described artificial diamond cutter Parameters: rake angle γ = 15°, relief angle α = 8°, the shape of the knife tip is a wiper edge, the radius of the knife tip arc r = 0.5mm, and the chamfer of the tool tip c = 0.5mm;

[0045] Process the groove or hole from one side of the carbon fiber laminate to one-third of the material thickness, leave a margin of about 0.5mm around the groove or hole, and then mill and ...

Embodiment 3

[0048] Embodiment 3, for processing 10mm round holes in flat carbon fiber laminates, including clamping steps, drilling processing steps and post-processing steps;

[0049] (1) Clamping steps:

[0050] Wooden boards are set on the upper and lower sides of the carbon fiber laminate and clamped;

[0051] (2) Drilling process steps:

[0052] For drilling, tungsten-cobalt carbide drills are used, the feed rate is 100mm / min, the tool speed is 2400r / min, and the drill bit is a twist drill with a cone angle of 118°;

[0053] (3) Post-processing steps:

[0054] After the processing is completed, remove the wooden boards set on the upper and lower sides of the carbon fiber laminate.

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Abstract

The invention discloses a method for machining slotted holes on carbon fiber laminated boards, which belongs to a machining method for nonmetallic materials, solves the problem that by the existing milling and drilling methods, carbon fiber laminated boards are easy to laminate, split and burn, and aims at improving the machining precision of carbon fiber composite products and reducing the surface roughness of carbon fiber composite products. The method disclosed by the invention comprises a clamping step, a machining step and a post-processing step, wherein the machining step is one or two of a milling machining step and a drilling machining step. According to the invention, in the machining process, a non-deformed clamping mode is used, and through selecting reasonable cutting tool materials, geometric parameters of cutting tools, and milling and drilling machining parameters, the appearance allowances in machining are reasonably arranged, thereby solving the quality problems of laminating, splitting and burning and the like existing in the process of opening or drilling carbon fiber thin-wall revolution bodies and carbon fiber laminated boards by using the traditional methods, so that the qualified rate of carbon fiber parts is increased from 50% to more than 99%.

Description

technical field [0001] The invention belongs to a machining method for non-metallic materials, in particular to a method for machining slot holes on a carbon fiber laminate. Background technique [0002] Carbon fiber composite material is a non-metallic material with excellent mechanical properties. It has the characteristics of light weight, high strength, easy molding, and corrosion resistance. It has been widely used in many fields such as military and civilian. Carbon fiber composite structural parts are the same as metal material structural parts. After the blank is formed, it generally needs further machining of the inner shape, and the connection between carbon fiber composite parts and between carbon fiber composite parts and metal parts requires holes and openings. . Due to the high overall strength and high brittleness of carbon fiber composite materials, factors such as cutting force, vibration, and clamping during machining may cause open mechanical damage to th...

Claims

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Application Information

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IPC IPC(8): B23P17/00
Inventor 谢萍罗加斌卢天山王德跃孙立君
Owner HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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