|本期目录/Table of Contents|

 基于CVD厚膜金刚石刀具的超声振动切削模具钢实验(PDF)

《纳米技术与精密工程》[ISSN:1672-6030/CN:12-1351/O3]

期数:
2013年5期
页码:
464-472
栏目:
精密加工
出版日期:
2013-09-15

文章信息/Info

Title:
Ultrasonic Vibration-Assisted Cutting of AISI 420 Mod Steel
by Using CVD Thick-Film Diamond Tool
作者:
 谢晓丹 李 勇 Duong Camvinh Ahmed Al-Zahrani
 清华大学摩擦学国家重点实验室, 北京 100084
Author(s):
 Xie Xiaodan Li Yong Duong Camvinh Ahmed Al-Zahrani
 State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
关键词:
 CVD厚膜金刚石刀具超声振动切削模具钢
Keywords:
 CVD thick-film diamond tool ultrasonic vibration-assisted cutting mold steel
分类号:
TG712;TG663
DOI:
-
文献标识码:
A
摘要:
 采用化学气相沉积(chemical vapor deposition, CVD)厚膜金刚石刀具进行模具钢超声振动切削实验. 首先阐述刀具的材质特点,观测其刀尖微观形貌和切削刃截面轮廓.然后搭建了适应精密/超精密加工需求的超声振动切削实验装置,其中激振机构可稳定实现频率42.0 kHz、振幅峰峰值8~9 μm的振动输出.通过切削无氧铜实验证明该超声振动切削装置工作有效、稳定后,选用AISI 420模具钢进行切削实验,研究切削工艺条件及切削用量对加工质量的影响,得到适用于CVD厚膜金刚石刀具的切削用量选取范围,对比研究发现超声振动切削在提升加工表面质量、减少金刚石刀具磨损方面均优于常规切削. 本研究可使切削模具钢时的金刚石刀具磨损VBmax由500~600 μm减少至40 μm,模具钢表面粗糙度Ra由0.93 μm改善至0.09 μm.本研究为金刚石刀具超声振动切削模具钢的实用化积累工艺经验,并探索提供可行的技术实现途径.
Abstract:
 In this paper, chemical vapor deposition(CVD) thick-film diamond tool was used in ultrasonic vibration-assisted cutting (UVC) process for turning mold steel. Firstly the micro-structure and the edge profile of the tool were observed and discussed. Then a set of UVC experimental outfit was established, and the tool vibrator of the outfit reached a vibration with the frequency of 42.0 kHz and the amplitude of 8—9 μm. And it was testified that the UVC outfit worked well in the oxygen-free copper cutting process. Afterwards, AISI 420 Mod steel was turned on the UVC outfit by using CVD thick-film diamond tool. Different machining parameters were experimented, and appropriate parameters fitting UVC turning were acquired, also the tool wear and surface finish between UVC turning and conventional turning were compared. It was observed that the UVC process in this paper could reduce tool wear VBmax from 500—600 μm to 40 μm and improve surface finish Ra from 0.93 μm to 0.09 μm. This research helps accumulate UVC cutting experience and proposes a hopeful method for diamond tool directly turning mold steels.

参考文献/References

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备注/Memo

备注/Memo:
收稿日期: 2013-02-25.
基金项目: 清华大学摩擦学国家重点实验室自主研究重点课题基金资助项目(SKLT09A04).
作者简介: 谢晓丹(1982— ),男,博士,xiexiaodan@vip.163.com.
通讯作者: 李 勇,教授,liyong@mail.tsinghua.edu.cn.
网络出版时间: 2013-06-28. 网络出版地址: http://www.cnki.net/kcms/detail/12.1351.O3.20130628.1732.009.html.
更新日期/Last Update: 2013-10-23