หน้าแรก >> งานวิจัยและพัฒนา บทความวิชาการ
บทความวิชาการ
58042I – A Design of Lathe Boring Tool with Rotating Cutter Principle
Created by : , Publish 09 Feb 2016 , Views 671
view Abstract and Download
Abstract : Boring process is the machining process to enlarge an internal diameter of cylindrical tubes and is considered one of the most important processes in rocket motor manufacturing. In general, vertical boring is used over horizontal boring in order to control dimensional accuracy and concentric of bored tubes. However, vertical boring process required a specific machine which can be a burden to manufacturer. In this study, the lathe boring tool is developed to reduce the cost of acquiring new machine. In a typical boring process using horizontal lathe, the ratio between workpiece internal diameter and length is restricted to 1:3. If the length is too long, defects such as uneven roughness can be observed due to vibration of cutting insert. The new horizontal boring tool is designed based on rotating cutter principle. The designed is simulated using finite element method and tested on S40C cylindrical tubes. The surface finished of tested workpiece is within tolerance and acceptable.


Buyuk bir is yerde yillarini vermis olan olgun kadin kendisinin porno izle son zamanlarda patronlari tarafindan begenildigini ogrenince mobil porno hafta sonu partilere akmak ister ve en seksi elbiselerini porno izle giyerek muhtesem olgun bedenini sokaga cikarir Aklinda cilginca seks izle eglenerek seks yapmak olan olgun kadin eglence mekanlarinin oldugu rokettube yere gelerek kendisine en uygun olan adami secmek ister Karsisin porno video siyahi bir adam cikinca ona tek bakisi ile suzen olgun kadin yavasca mobil pornolar suzulerek yanina gelir ve ona kendisini tanistirip bu gece sex hikayeleri kendisiyle olmak istedigin soyleyerek eglence mekanina girer ve alkolu porno resimler fazla kacirmadan zencinin evine gelip mutusuz oldugu bahanesi ile direk sikti
สถาบันเทคโนโลยีป้องกันประเทศ อาคารสำนักงานปลัดกระทรวงกลาโหม (แจ้งวัฒนะ) ชั้น 5 เลขที่ 47/433 หมู่ 3 ถนนแจ้งวัฒนะ ตำบลบ้านใหม่ อำเภอปากเกร็ด จังหวัดนนทบุรี 11120 โทรศัพท์ : 0 2980 6688, โทรสาร : 0 2980 6199


ติดตามผ่านสื่อ Social ที่ : Facebook, Youtube

Copyright © 2019 Defence Technology Institute. All Rights Reserved.
Visitor No. visitorvisitorvisitorvisitorvisitorvisitorvisitorvisitor sitemap