【机械类毕业论文中英文对照文献翻译】超声表面滚压Q345液压支柱工艺参数对表面粗糙度的影响研究
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机械类毕业论文中英文对照文献翻译
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【机械类毕业论文中英文对照文献翻译】超声表面滚压Q345液压支柱工艺参数对表面粗糙度的影响研究,机械类毕业论文中英文对照文献翻译,机械类,毕业论文,中英文,对照,文献,翻译,超声,表面,Q345,液压,支柱,工艺,参数,粗糙,影响,研究
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Study on the Effect of Ultrasonic Surface Rolling Processing Parameters on the Surface Roughness of Q345 Hydraulic Prop Guangyi Meia, Kehua Zhangb and Jinfu Dingc Transportation College of Zhejiang Normal University, JinHua 321004, China amgy, b mature, c zsddif Keywords: Ultrasonic rolling, Machining parameter, Surface roughness, Hydraulic prop Abstract. The surface roughness of the hydraulic prop had an important effect on the wear resistance, fatigue strength and property of fit. The ultrasonic surface rolling extrusion (USRE) processing experiment was employed to improve the surface roughness of the hydraulic prop, some machine parameters such as the tools transfer magnitude, feed were studied in detail, the contact style roughness tester( Mahr S2) was used to test the surface roughness of the workpiece. The experiment results showed that the USRE could improve the surface roughness evidently, the Ra value from 0.976m reduce to 0.105 m by one-hit machining. The feed was linear with the surface roughness, and when the tools amplitude was 6.58.5, there were a better surface roughness Ra 0.090m. USRE processing the surface time and again could improve the surface state. Introduction The hydraulic prop was a tangent pile that could be used fit the hinge the top beam or exclusive use; it was the matching equipment for mechanized mining. The hydraulic prop was the important mine safety appliance, the machining surface quality have important effect on the usability: 1.effect on the abrasion resistance, the surface roughness have an important effect on beginning period of the friction, far from that as little as may be surface roughness, there are a best parameter for the friction about 0.321.25m. 2. Effect on the fatigue strength, the uneven surface and flaw on the surface would cause stress concentration and bring about fatigue and fracture, so the contact surface should be finished and enhance the fatigue strength.3.effect on the corrosion resistance, the corrosion matter are easy to accumulate on the roughness surface, so reducing the surface roughness could enhance the corrosion resistance.4.effect on the property of fit, if mating on the rough surface the tolerance clearance would be increased by the wear and tear of the property of fit, so the precision and rigidity of fit would be cut down, it would impact the stationarity and the reliability1,2,3. So the mating surface must be finished. In order to high effective improve the surface state of the workpiece, a new machining technology ultrasonic surface rolling processing (USRP) was put forward, the USRP used the ultrasonic vibration to supply the energy to extrude the surface of workpiece 4, 5 This processing method has the fewer elasticity pressure, friction force, and surface roughness would reduce soon, and the surface hardness and abrasion resistance enhances observably. In this processing, the processing parameter such as axial direction, static pressure and amplitude of vibration decided the last surface state 6, 7. Ultrasonic Rolling Experimental System and Principle Ultrasonic Rolling Experiment Device. The ultrasonic rolling experiment device was shown in Fig. 1; it was composed of ultrasonic generator 8, transducer 6, amplitude transformer 5 and toolhead 2. The ultrasonic oscillation was translated to the mechanical vibration by the transducer, the amplitude was enlarged by the amplitude transformer, and then the energy was translated to the toolhead for finishing. The toolhead 2 was screwed joint with device, in the processing the relative rotative were generated between the workpiece surface and the toolhead. Advanced Materials Research Vols. 102-104 (2010) pp 591-594Online available since 2010/Mar/09 at (2010) Trans Tech Publications, Switzerlanddoi:10.4028/AMR.102-104.591All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of TTP,. (ID: 40-30/12/10,04:12:50) The Processing Principle. In the ultrasonic rolling processing, the toolhead generated mechanical vibration that was caused by the ultrasonic generator and feed along the workpiece surface. So the static pressure and ultrasonic vibration were translated to the workpiece surface (as the Fig. 2 show). The macro-scale elasto-plastic deformation would generate by the extrude action. After processing, some recovery of elasticity would take place on the processed surface. So the plastic flow would change the asperity of workpiece, reduce the surface roughness and enhance the combination property of the finished surface 5. Fig. 1 The Schematic of the Ultrasonic Rolling Device Fig. 2 Principle of USRP 3 Fig. 3 The photo of the locale processing Experiment Materials and Conditions Experiment Materials. The experiment materials was Q345 hydraulic prop whose dimension was 97980mm, the element of Q345 steel was almost same with the 16Mn steel, there are some trace alloy element V, Ti and Nb in the Q345, this trace alloy element would grain refinement and enhance the tenacity, so the synthesis mechanic of the Q345 steel were improved large scale. The initial surface roughness value was Ra 0.4m. Experiment Condition. The conventional processing technic of hydraulic prop were lapping first and then polishing, the needed surface roughness value was Ra 0.4m. In this experiment, the ultrasonic rolling processing was used to substrate the lapping and polishing. The experiment was carried on NC turning machine, the locale processing photo was shown in Fig. 3. The surface roughness value was measured by the Mahr S2. Experiment Results and Discussion The Processing Amplitude Impacted on the Surface Roughness of Workpiece. The ultrasonic rolling processing was employed to study the amplitude impact on the surface roughness value, the experiment parameter were that speed of main shaft was 710 rmin, the feed was 0.12 mmr, and the static pressure was 140N, processing the surface three times. The amplitude VS surface roughness was shown in Fig. 4, the relative of the amplitude and surface was not monotonic function, suitable to 592Digital Design and Manufacturing Technology enlarge the amplitude would improve the surface roughness, but excess some value the surface roughness value would deteriorate. Fig. 4 The relation between the amplitude of tool and surface roughness The Feed Impact on the Surface Roughness. The experiment was employed to study the feed impacted on the surface roughness, the ultrasonic rolling processing with different feed was carried, the feed VS surface roughness relative was shown in Fig. 5, and the feed was linear relation with surface roughness. Fig. 5 The relation between the surface roughness and feed The Processing Static Pressure Iimpacted on the Surface Roughness. In the ultrasonic rolling processing, the tools with some static pressure and definite feed speed to processing the rotate workpiece surface to make the workpiece materials elasticity and plasticity deformation. After the tools pass by the workpiece surface would take place elastic recovery. The metal flow would caused the vale being filled with the asperity， so the surface roughness would be improved. As Fig. 6 showed that the static pressure increased and the surface roughness reduced. Fig. 6 The relation between static pressure and surface roughness The Spindle Speed and Axial Feed Impacted on the Surface Roughness. The ultrasonic rolling processing experiment was employed to study the spindle speed and axial feed impacted on the surface roughness, the processing parameter was static pressure 140N and amplitude 13m, every workpiece was processed three times and the relative of the spindle speed and axial feed VS surface Advanced Materials Research Vols. 102-104593 roughness was shown in Fig. 7. Surface roughness value increased with the raising of the axial feed and spindle speed. Fig. 7 The effect of the spindle speed and axial feed for the surface roughness Conclusions In this research the ultrasonic rolling processing experiment was employed to substitute the conventional rolling processing technic. The effect rule of the spindle speed, axial feed, static pressure and amplitude impacted on surface roughness value was investigated, if the processing parameter selected suitably, the surface roughness value would improve evidently and reach about Ra 0.1 um. So the ultrasonic rolling processing could efficiently replace the lapping and polishing in the hydraulic prop finishing processing. In ultrasonic rolling processing with 20KHz work frequency, the rational processing parameter for the Q345 hydraulic prop: spindle speed 710 r/min, axial feed 0.12mm/r, the static pressure 140N, amplitude 13.2m , the roller radii 3mm and the roller materials adopted the cemented carbide. Acknowledgement The authors gratefully acknowledge the funding for this work from Natural Science Foundation of Zhejiang Province (Grant No. Y106187) References 1 L.F. Han, S.G. Qu and W. Xia: Machine Tool and Hydraulics, (2007), p. 19-21 (in Chinese) 2 M.H. El-Axi and M.M. El-Khabeery: Journal of Materials Processing Technology, (2003), p. 82-89 3 D.P. Wang, N.X. Song, T. Wang, et a1: Journal of Tianjin University, (2007), p. 228-233 (in Chinese) 4 X.J. Liu: Mechanical Research and Application, (2007), p. 38-39 (in Chinese) 5 L. Chen: Journal of Materials Processing Technology, (2008), p. 439-450 (in Chinese) 6 F.G. Cao: Chemical Industry Press, Beijing 2005 (in Chinese) 7 G.Y. Lv, Y.L. Zhu, et al: China Surface Engineering, (2007), p. 38-41 (in Chinese) 594Digital Design and Manufacturing TechnologyDigital Design and Manufacturing Technology doi:10.4028/AMR.102-104 Study on the Effect of Ultrasonic Surface Rolling Processing Parameters on theSurface Roughness of Q345 Hydraulic Prop doi:10.4028/AMR.102-104.591 References1 L.F. Han, S.G. Qu and W. Xia: Machine Tool and Hydraulics, (2007), p. 19-21 (inChinese) 2 M.H. El-Axi and M.M. El-Khabeery: Journal of Materials Processing Technology, (2003),p. 82-89doi:10.1016/S0924-0136(02)00269-8 3 D.P. Wang, N.X. Song, T. Wang, et a1: Journal of Tianjin University, (2007), p. 228-233(in Chinese) 4 X.J. Liu: Mechanical Research and Application, (2007), p. 38-39 (in Chinese) 5 L. Chen: Journal of Materials Processing Technology, (2008), p. 439-450 (in Chinese) 6 F.G. Cao: Chemical Industry Press, Beijing 2005 (in Chinese) 7 G.Y. Lv, Y.L. Zhu, et al: China Surface Engineering, (2007), p. 38-41 (in Chinese)河南理工大学万方科技学院本科毕业设计附录：外文资料与翻译院（系部）万方科技学院机械与动力工程系专业名称 机械设计制造及其自动化年级班级 07级机制二班学生姓名 彭 鹏指导教师 李 章 东2011年5月英文题目为：超声表面滚压Q345液压支柱工艺参数对表面粗糙度的影响研究。Guangyi Meia, Kehua Zhangb and Jinfu DingcTransportation College of Zhejiang Normal University, JinHua 321004, Chinaamgy, b mature, c zsddif关键词：超声波轧制，加工参数，表面粗糙度，液压支柱摘要:液压支柱表面粗糙度对耐磨性，疲劳强度和其配合性能的重要影响。超声波表面滚压（USRE）处理实验旨在降低该液压支柱的表面粗糙度和一些机床参数，如工具振动幅度，需要详细研究的进给速度。测试工件的表面粗糙度的仪器是接触式粗糙度仪（MahrS2）。实验结果表明，USRE可以明显改善液压支柱的表面粗糙度，经过一次加工的表面粗糙度的值可以从0.976m减少到0.105um。进给速度与表面粗糙度呈线性关系，当工具的振动幅度为6.58.5的范围内时，有最佳的表面粗糙度值Ra为0.090m与之对应。 运用USRE多次加工表面可以提高表面的质量。介绍:液压支柱是一个切线桩可用于符合铰链的顶梁或专有使用，这是对综合配套设备。液压支柱是煤矿安全的重要设备，加工表面质量对使用性能有重要的影响：1对耐磨性的影响，表面粗糙度对摩擦的起始阶段有重要的影响，之后表面粗糙度对其的影响越来越小，而此时摩擦有一个最佳的参数约0.321.25m。 2。对疲劳强度的影响，凹凸不平的表面和表面缺陷会导致应力集中而导致疲劳断裂，所以整理后的接触面应具有较高的疲劳强度。3.对抗腐蚀性的影响 ，腐蚀问题是容易堆积在粗糙的表面，因此降低表面粗糙度可提高抗腐蚀性能.4对配合性能的影响，如果在粗糙的表面上有公差配合间隙将增加的磨损和撕裂的配合性能，因此配合精度和刚性将会降低，这将影响工件1,2,3的工作平稳性和可靠性。因此，配合面必须达到要求。为了高效的改善工件表面质量，一个新的加工技术超声表面滚压加工（USRP）被提出，在USRP利用超声振动的能量供应挤压工件4，5表面。这种处理方法会产生更少的弹性压力，摩擦力，并能够很快将降低表面粗糙度，而表面硬度和耐磨性将会显著提高。在此处理过程中，加工参数如轴向方向，静压和振动幅度决定了工件6，7最后的表面质量。轧制实验系统和超声波原理超声波轧制试验装置 超声波轧制实验装置如图1所示。 它是由超声波发生器8，换能器6，变幅杆5和工具头2。超声波振动通过换能器转化成机械振动，振幅是通过振幅转化器增大，然后能量再转移给正在工作的工具头。该工具头2是通过螺丝拧紧与设备连接上的，在加工的过程中工件表面与工具头之间产生相对旋转。数字化设计与制造技术的处理原则 在超声波压延加工，工具头产生的机械振动，是由超声波发生器和沿工件表面的进给速度共同引起的。因此，静态压力和超声波振动将作用到工件表面（为图2显示）。挤压作用会产生宏观尺度上的弹塑性变形。处理后，加工表面将会产生一定的弹性恢复。因此，塑性流动会改变工件的表面，降低表面粗糙度，提高已加工过表面的综合性能5。图1.轧制设备超声示意图图2.原理USRP 3图3.现场加工的照片实验材料和实验条件的材料实验材料 实验材料为Q345系列液压支柱，其尺寸为97980毫米，Q345钢的元素几乎与16Mn钢一样，也有一些微量合金元素，有V，Ti和Nb，这些微量合金元素能够促使晶粒细化和提高韧性，所以对含有Q345钢的综合大型机械有很大的改善。其初始的表面粗糙度值Ra是0.4m。实验条件 液压支柱的传统加工工艺是先研磨后抛光，达到的表面粗糙度值Ra是0.4m。在这个实验中，采用超声波压延加工对基板进行研磨和抛光。实验是NC数控车床上进行的，加工照片是区域设置如图3。表面粗糙度值是MahrS2通过来衡量的。实验结果与讨论振幅对加工工件表面粗糙度的影响 在超声波压延加工中来研究振幅对表面粗糙度值的影响，实验参数：主轴的转速为710转/分，进给速度为0.12毫米/ 001和静态压力为140N，表面处理三次。振幅的幅值与表面粗糙度的关系如图4所示。振幅的幅值和表面粗糙度呈不单调的函数关系，适当增加振幅的幅值将会改善表面粗糙度，但过量就会使表面粗糙度恶化。图4 工具头的幅值和表面粗糙度之间的关系进料速度对表面粗糙度的影响 该实验来研究进料速度对表面粗糙度的影响，超声波进行压延加工是伴随着不同的进料速度进行的，进料速度与表面粗糙度的关系如图5所示，进料速度与表面粗糙度呈线性关系。图5. 表面粗糙度和进料速度之间的关系加工静压力对表面粗糙度的影响 在超声波压延加工中，具有一定的静态的压力和进给速度的工具来处理旋转工件表面，使工件材料产生弹性和塑性变形。通过工具处理后的工件表面将会产生弹性恢复。金属流动会造成谷状的粗糙表面，因此工件的表面粗糙度将会改善。正如图6中表明，静态压力增大，表面粗糙度降低。图 6. 静压力与表面粗糙度的关系主轴转速和进给轴速度对表面粗糙度的影响 超声波压延加工实验，研究主轴转速和进给速度对表面粗糙度的影响，加工参数：静态压力140N和振幅13m，每一个工件处理三次，主轴转速和进给速度与表面粗糙度的关系如图7所示。表面粗糙度值随轴向进给速度和主轴转速的提高而增加。图 7 . 主轴转速和进给轴速度对表面粗糙度的影响总结在本研究中超声波压延加工用来替代传统的压延加工工艺。对表面粗糙度的影响基本的因素如主轴转速，轴向进给，静态压力和振动幅值进行了研究，如果选择合适的工艺参数，表面粗糙度值将明显提高，Ra值达到约0.1um。因此，在液压支柱整理加工中超声波压延加工可以有效地取代研磨抛光。在超声波20kHz的工作频率下工作状态最好，而此时Q345系列液压支柱最佳加工参数：主轴转速710转/分，轴向进给0.12毫米/ 001静压140N，振幅13.2m，滚子和滚子半径3mm以及滚子的材料采用硬质合金。Referen
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