外文翻譯--微螺紋的旋風(fēng)式加工 英文版

1、Masaki Serizawa Department of Mechanical Engineering, Tokyo Denki University, 5 Senjyu Asahi-cho, Adachi-ku, Tokyo 120-8551, Japan e-mail: 12ky044@ms.dendai.ac.jpMotohiro Suzuki Department of Mechanical Engineering, Toky

2、o Denki University, 5 Senjyu Asahi-cho, Adachi-ku, Tokyo 120-8551, Japan e-mail: kettle-on-the-stove@ezweb.ne.jpTakashi Matsumura1Mem. ASME Department of Mechanical Engineering, Tokyo Denki University, 5 Senjyu Asahi-cho

3、, Adachi-ku, Tokyo 120-8551, Japan e-mail: tmatsumu@cck.dendai.ac.jpMicrothreading in WhirlingWhirling is applied to machining of microscrews on thin wires. A micro whirling machine has been developed for this. In order

4、to suppress the vibration of the workpiece, the wire is inserted in polyurethane tubes clamped on a metal bar. Frequency analyses have been conducted by loading impulse forces at the center of the wire. The dynamic respo

5、nse is improved with reducing the vibration in the clamping force by the developed clamping system. Thirty micrometers microgrooves have been machined on 0.3 mm diameter stain- less steel wires with fine surface finish,

6、with the developed machine tool. [DOI: 10.1115/1.4030704]IntroductionMicroscrews are used for mechanical joints and motion controls in microdevices. Stainless steel and titanium alloy, which are difficult-to-cut material

7、s, are used in medical and dental devices because of their biocompatibility. Although, up to now, most micro-elements have been manufactured by chemical etching and energy beam processes, some manufacturing cost and prod

8、uction rate issues remain. More effective and flexible processes are required for the mass production of microparts. Micromechanical processing, one of the alternative processes, has remarkably pro- gressed with the deve

9、lopment of microtools and motion controls. Many studies of microscale cutting, forming, and injection molding have recently been applied to manufacturing of microparts [1,2]. Thread whirling, which is a material removal

10、process with tool and workpiece rotations, has been applied to screw manufacturing in many mechanical industries, since it was developed by the Burgsmuller company in Germany. Worm and ball screws for motion controls and

11、 bone screws for the implant parts [3], which are made of hard materials, have been machined by whirling. Having many advantages in terms of tool wear and chip control, whirling has been widely applied in the bearing and

12、 the medical industries. Mohan and Shunmugam presented a mathematical model to control the cutting processes and determined the tool profiles in whirling [4]. Lee et al. presented a model of the uncut chip shape to estim

13、ate the cutting force from the maximum chip thickness and the tool-work contact length. They divided the uncut chip shape into the material removed by the front cutting edge and that by the side cutting edge; and estimat

14、ed the cutting force by finite element (FE) analysis [5]. Song and Zuo proposed a novel model based on the equivalent cutting volume and simu- lated the chip formation in a FE commercial tool, AdvantEdge [6]. Son et al.

15、measured the cutting force components with a non- contact rotating tool dynamometer and compared the measured force with the simulations using the FE analysis tools, DEFORM andADAMS [7]. Guo et al. also analyzed the cutt

16、ing tools’ processing angle in whirling [8]. Although whirling is effective in threading, the screws are generally machined on large diameter shafts. This study applies whirling to cutting threads on thin wires for micro

17、mechanical devices. The paper first presents an overview ofwhirling process along with its machining advantages. Based on the whirling mechanism, a micro whirling machine tool has been developed for machining microscrews

18、 on thin wires. Because the stiffness and the damping of the thin wire are low, a clamping device has also been developed to support the wire. Vibration tests have been conducted to verify improvement of the dynamic resp

19、onse of the workpiece with the clamping device. Microscrews have been machined on 0.3 mm diameter titanium alloy and stainless steel wires with fine surfaces, using the devel- oped machine tool. A mechanistic model is de

20、scribed to obtainFig. 1 Thread whirling1Corresponding author. Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MICRO- AND NANO-MANUFACTURING. Manuscript received September 1

21、, 2014; final manuscript received May 26, 2015; published online August 13, 2015. Assoc. Editor: Martin Jun.Journal of Micro- and Nano-Manufacturing DECEMBER 2015, Vol. 3 / 041001-1 Copyright V C 2015 by ASMEDownloaded F

22、rom: http://asmedigitalcollection.asme.org/ on 03/14/2016 Terms of Use: http://www.asme.org/about-asme/terms-of-useFig. 5 Workpiece clamping system: (a) work area and (b) workpiece supporting deviceFig. 6 Impulse respons

23、e testFig. 7 Vibration in clamping force: (a) wire without supporting device, (b) wire clamped on supporting device, and (c) wire clamped on supporting device with polyurethane tubesJournal of Micro- and Nano-Manufacturi