欧美人妻精品一区二区三区99,中文字幕日韩精品内射,精品国产综合成人亚洲区,久久香蕉国产线熟妇人妻

There are many causes of deformation in aluminum part machining, which are related to material properties, part geometry, and production conditions. The main factors include: deformation caused by residual stress in the blank, deformation induced by cutting forces and cutting heat, and deformation due to clamping forces.

Process Measures to Reduce Machining Deformation

Reducing Residual Stress in Blanks

Natural or artificial aging, as well as vibration treatment, can partially eliminate residual stresses in blanks. Pre-machining is also an effective method. For bulky blanks with excessive stock allowance, post-machining deformation tends to be significant. By pre-machining to remove excess material and balance stock allowance, subsequent machining deformation can be reduced. Additionally, allowing the pre-machined blank to rest helps release residual stresses.

Causes Analysis and Process Control Measures for Machining Deformation of Aluminum Components 2

Improving Tool Cutting Performance

Tool material and geometric parameters significantly influence cutting forces and heat generation. Proper tool selection is crucial for minimizing part deformation.

Optimizing Tool Geometry

Rake Angle:

A larger rake angle (while maintaining edge strength) enhances cutting sharpness, reduces chip deformation, improves chip evacuation, and lowers cutting forces and temperatures. Negative rake angles should be avoided.

Clearance Angle:

The clearance angle directly affects flank wear and surface finish. For rough milling with heavy loads and high heat, a smaller clearance angle improves heat dissipation. For finish milling, a larger clearance angle reduces friction and elastic deformation.

Helix Angle:

A higher helix angle ensures smoother milling and reduces cutting resistance.

Lead Angle:

A smaller lead angle improves heat dissipation and lowers average cutting zone temperatures.

 

Enhancing Tool Structure

Reducing Teeth Count & Increasing Chip Space:

Aluminum’s high plasticity demands larger chip pockets. Tools with fewer teeth and wider gullets are preferred.

Precision Edge Honing:

The cutting edge roughness should be below Ra = 0.4 μm. Lightly honing new tools with a fine stone removes burrs and micro-serrations, reducing heat and deformation.

Strict Wear Control:

Tool wear increases surface roughness, cutting temperature, and part deformation. Wear limits should not exceed 0.2 mm to prevent built-up edge. Workpiece temperature should stay below 100°C to avoid distortion.

machining deformation

Optimizing Workpiece Fixturing

For thin-walled aluminum parts with low rigidity:

Axial Clamping for Bushings

Radial clamping (e.g., 3-jaw chucks) causes post-machining deformation. Instead, use a threaded mandrel inserted into the part’s bore, secured axially with a endplate and nut to maintain precision during OD machining.

Vacuum Chucks for Thin Plates

Uniform clamping force distribution paired with light cuts minimizes distortion.

Filling Method

Fill hollow parts with a low-melting filler (e.g., urea-potassium nitrate melt) to enhance rigidity during machining. Dissolve the filler post-process in water/alcohol.

Strategic Process Sequencing

High-speed machining with large stock or interrupted cuts may induce vibration. A typical CNC process flow:

Roughing → Semi-finishing → Corner Cleaning → Finishing

For high-precision parts, repeat semi-finishing before final passes. Post-roughing natural cooling relieves stresses. Leave 1–2 mm stock after roughing; maintain 0.2–0.5 mm uniform allowance in finishing to ensure stability, reduce deformation, and achieve high surface quality.

Operational Techniques to Minimize Machining Deformation

In addition to the aforementioned causes, operational methods play a crucial role in controlling deformation during aluminum part machining.

Causes Analysis and Process Control Measures for Machining Deformation of Aluminum Components 3

Symmetrical Machining for Large Stock Parts

For better heat dissipation, use alternating symmetrical machining. Example: A 90mm plate machined to 60mm achieves 0.3mm flatness when processed in alternating passes versus 5mm with consecutive machining.

Layered Machining for Multi-cavity Parts

Machine all cavities layer-by-layer simultaneously to ensure uniform stress distribution, preventing deformation from uneven forces.

Optimized Cutting Parameters

Adjust depth of cut (ap) with corresponding feed rate and spindle speed increases in CNC high-speed milling to balance productivity and reduced cutting forces.

Strategic Tool Path Selection

Use conventional milling for roughing (maximum removal rate) and climb milling for finishing (better surface quality with progressive chip thickness reduction).

Thin-wall Fixturing Technique

Before final passes, briefly release and reapply minimal clamping force to allow natural recovery, applying force along the part’s most rigid direction.

Cavity Machining Method

Avoid direct plunging; pre-drill or use helical entry paths to prevent chip packing and tool breakage.

Causes Analysis and Process Control Measures for Machining Deformation of Aluminum Components 4

Вывод

Aluminum part deformation stems from material properties, geometry, and processing conditions, primarily involving?blank residual stresses,cutting forces/heat,and clamping stresses.The integrated application of these process optimizations and operational techniques significantly reduces deformation, enhances precision and surface quality, providing reliable technical support for production.

Добавить комментарий

Ваш адрес email не будет опубликован. Обязательные поля помечены *

成人精品视频区一区二区三| 男人操女人黄片黄色| 亚洲 自拍 欧美 一区| 性一交一乱一乱一区二区| 日本不卡免费一区二区视频| 久久久久亚洲精品无码系列| 国产亚洲欧美日韩在线观看一区| 男人添女人下面免費视頻| 国产污污污在线观看视频| 国产色哟哟精选在线播放| 午夜场射精嗯嗯啊啊视频| 玖玖资源站无码专区| 黑人大鸡把操逼视频| 呦交小u女国产精品99| 日韩视频在线网页| 男人添女人下面免費视頻| 中文字幕在线观一区二区| 波多野吉衣一区在线观看| 久久99热精品在线观看| 男生插女生下面流出白色精液视频| 国语自产免费精品视频在| 最新日本一区二区三区免费看| 美女穿黑丝被大鸡巴猛操| 日本入室强伦姧人妻中文| 一区亚洲免费二区| 另类亚洲欧美专区第一页| 伊人久久综合无码成人网| 丁香社区五月在线视频久| 精品精品国产一区二区性色av| 国产欧美一区二区精品久久久| 中文字幕在线观看第二页| 日本免费精品一区二区三区四区| 老湿机69福免费破解版| 久久久久黑人强伦姧人妻| 枫花恋精品一区二区久久| 精品久久久久五月婷五月| 美女亚洲福利视频| 日韩美女在线视频一区不卡| 蜜桃av噜噜一区二区三区免费| 人人妻人人澡精品99| 久久无码免费视频|