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影响切削工件表面质量的因素分析及要因的检测系统设计 被引量:6
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作者 曾其勇 吴凯 +2 位作者 郑晓峰 朱明 严瑞琪 《制造技术与机床》 CSCD 北大核心 2012年第4期108-111,共4页
采用因果分析图等质量分析工具分析了影响切削加工工件表面质量的原因,并找出了影响表面粗糙度的主要因素是切削力、切削温度和机械设备振动。针对切削力和切削温度影响因素,将薄膜热电偶技术引入切削温度检测,设计了一套切削力和切削... 采用因果分析图等质量分析工具分析了影响切削加工工件表面质量的原因,并找出了影响表面粗糙度的主要因素是切削力、切削温度和机械设备振动。针对切削力和切削温度影响因素,将薄膜热电偶技术引入切削温度检测,设计了一套切削力和切削温度的完整检测系统。试验表明,该检测系统人机交互作用强,操作简单,使用方便。 展开更多
关键词 切削工件 表面质量 切削 切削温度 检测系统设计
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基于错位塔形工件的旋转轴几何误差辨识
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作者 程涛 项四通 +1 位作者 张海南 杨建国 《光学精密工程》 EI CAS CSCD 北大核心 2023年第21期3125-3134,共10页
旋转轴的几何误差直接影响五轴机床的加工精度,但由于其误差项多且高度耦合,因此辨识难度较大。提出了一种工件切削在机测量方法,用于辨识五轴机床旋转轴6项与位置相关的几何误差。设计并加工一种错位塔形工件,它由三层错位叠加的矩形... 旋转轴的几何误差直接影响五轴机床的加工精度,但由于其误差项多且高度耦合,因此辨识难度较大。提出了一种工件切削在机测量方法,用于辨识五轴机床旋转轴6项与位置相关的几何误差。设计并加工一种错位塔形工件,它由三层错位叠加的矩形块组成。在工件不同层级的底面与侧面布置测点并进行在机测量,基于空间误差模型推导出每项误差的辨识原理与解析解,并采用蒙特卡洛模拟进行不确定性分析。最后,通过与球杆仪误差辨识方法进行对比验证,线性误差EXC,EYC与EZC的辨识结果偏差最大为2.7,-1.7与-1.3μm;角度误差EAC,EBC与ECC的辨识结果偏差最大为1.3″,-0.6″与-2.1″,两者辨识平均吻合度达95.4%。本方法通过工件切削与在机测量,每项误差的辨识原理与解析解形式简单,可辨识实际工况下的旋转轴6项位置相关的几何误差。 展开更多
关键词 五轴机床 旋转轴 几何误差 误差辨识 工件切削 在机测量
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工件材料切削加工性的模糊识别
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作者 成永笑 马春翔 王光斗 《东北重型机械学院学报》 CAS 1994年第2期99-102,共4页
基于模糊集建立了工件材料切削加工性等级模糊数学模型,给出了工件材料切削加工性模糊线性识别基本模型,进行了实例计算,其结果与实际情况相符.
关键词 切削工件 模糊识别 工件 材料
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基于ABAQUS的金属切削有限元仿真
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作者 付莎莎 迪茹侠 刘站 《轻工科技》 2023年第3期82-85,共4页
因为金属材料的切削运动是一种非线性的动态过程,所以用传统的分析方法很难对切削机理作出定量的分析,得出准确的结论。本文基于弹塑性的有限元理论建立易切削钢二维有限元模型,使用限元仿真软件ABAQUS,对易切削钢在切削过程中弹塑性变... 因为金属材料的切削运动是一种非线性的动态过程,所以用传统的分析方法很难对切削机理作出定量的分析,得出准确的结论。本文基于弹塑性的有限元理论建立易切削钢二维有限元模型,使用限元仿真软件ABAQUS,对易切削钢在切削过程中弹塑性变化模型进行仿真分析,并且在不同的切削深度下,对工件切削变形区的切削力以及等效塑性应变进行解析。通过对工件切削变形区的切削力变化云图和等效塑性应变云图分析得出结论:随着切削深度的增加,切削力也逐渐变大,断裂应变也随之逐渐增大。 展开更多
关键词 金属工件切削 切削深度 仿真模拟 切削 ABAQUS
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《切削加工件 通用技术条件》新旧标准的对比转换
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作者 解承华 《机械工业标准化与质量》 2002年第11期4-8,共5页
关键词 切削工件 通用技术条件 行业标准 标准转换
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CUTTING TEMPERATURE MEASUREMENT IN HIGH-SPEED END MILLING 被引量:8
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作者 全燕鸣 林金萍 王成勇 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2005年第1期47-51,共5页
A computer aided measurement system is used to measure the cutting temperature directly in high-speed machining by natural thermocouples and standard thermocouples. In this system the tool/workpiece interface temperat... A computer aided measurement system is used to measure the cutting temperature directly in high-speed machining by natural thermocouples and standard thermocouples. In this system the tool/workpiece interface temperature is measured by the tool/workpiece natural thermocouple, while the temperature distribution on the workpiece surface and that of interior are measured by some standard thermocouples prearranged at proper positions. The system can be used to measure cutting temperature in the machining with the rotary cutting tools, such as vertical drill and end milling cutter. It is practically used for the research on high-speed milling with hardened steel. 展开更多
关键词 high-speed milling end milling cutter cutting temperature THERMOCOUPLE
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《冷挤压模具设计与制造》讲座(连载八)
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作者 洪慎章 《模具制造》 2012年第5期94-96,共3页
第3讲 冷挤压零件设计 3.2.4尺寸精度和表面粗糙度 一般来说,冷挤压件的加工精度可达IT7~IT8级左右;表面粗糙度值可在0.8~1.6μm以下。随着冷挤压技术的进步,冷挤压件的尺寸精度和表面粗糙度已提高到可以与切削加工件相比的程度,
关键词 冷挤压技术 模具设计与制造 表面粗糙度值 连载 讲座 尺寸精度 切削工件 零件设计
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Development of analysis model for geometric error in turning processes 被引量:1
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作者 LEE Mun-jae LEE Choon-man 《Journal of Central South University》 SCIE EI CAS 2011年第3期711-717,共7页
A finite element model was established for analyzing the geometric errors in turning operations and a two-step analyzing process was proposed. In the first analyzing step, the cutting force and the cutting heat for th... A finite element model was established for analyzing the geometric errors in turning operations and a two-step analyzing process was proposed. In the first analyzing step, the cutting force and the cutting heat for the cutting conditions were obtained using the AdvantEdge. Also, the deformation of a workpiece was estimated in the second step using the ANSYS. The deformation was analyzed for a 150 mm-long workpiece at three different measuring points, such as 10, 70 and 130 mm from a reference point, and the amounts of the deformation were compared through experiments. /n the results of the comparison and analysis, the values obtained from these comparison and analysis represent similar tendencies. Also, it is verified that their geometric errors increase with the increase in temperature. In addition, regarding the factors that affect the deformation of a workpiecc, it can be seen that the geometric error in the lathe is about 15%, the error caused by the cutting force is about 10%, and the deformation caused by the heat is about 75%. 展开更多
关键词 geometric error machining accuracy finite element analysis TURNING cutting force cutting temperature
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机械结构设计中的加工工艺性研究
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作者 王军 《中国安全防范认证》 2013年第2期36-41,共6页
[摘要]机械结构设计是产品设计的基础。加工工艺性决定了零件最基本的性能和品质,从而决定了设备最终质量。本文结合实际设计案例对本所结构设计中常遇到的钣金件和切削加工件的加工工艺性进行了论述。简单形状、可靠冲裁、平缓弯曲和... [摘要]机械结构设计是产品设计的基础。加工工艺性决定了零件最基本的性能和品质,从而决定了设备最终质量。本文结合实际设计案例对本所结构设计中常遇到的钣金件和切削加工件的加工工艺性进行了论述。简单形状、可靠冲裁、平缓弯曲和提高零件强度等设计原则极大地优化了钣金件产品设计水平和设计效率。切削加工件可以从减小加工面积、减小切削难度和便于装配等方面提升工件的品质和后期装配的便捷性。 展开更多
关键词 加工工艺性 钣金件 切削工件
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Modeling of Transient Thermal Conditions in Cutting
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作者 T. Augspurger F. Klocke +3 位作者 B. Dobbeler M. Brockmann S. Gierlings A. Lima 《Journal of Mechanics Engineering and Automation》 2017年第3期113-119,共7页
The thermal conditions like the temperature distribution and the heat fluxes during metal cutting have a major influence on the machinability, the tool lifetime, the metallurgical structure and thus the functionality ... The thermal conditions like the temperature distribution and the heat fluxes during metal cutting have a major influence on the machinability, the tool lifetime, the metallurgical structure and thus the functionality of the work piece. This in particular applies for manufacturing processes like milling, drilling and turning for high-value turbomachinery components like impellers, combustion engines and compressors of the aerospace and automotive industry as well as energy generation, which play a major role in modern societies. However, numerous analytical and experimental efforts have been conducted in order to understand the thermal conditions in metal cutting, yet many questions still prevail. Most models are based on a stationary point of view and do not include time dependent effects like in intensity and distribution varying heat sources, varying engagement conditions and progressive tool wear. In order to cover such transient physics an analytical approach based on Green's functions for the solution of the partial differential equations of unsteady heat conduction in solids is used to model entire transient temperature fields. The validation of the model is carried out in orthogonal cutting experiments not only punctually but also for entire temperature fields. For these experiments an integrated measurement of prevailing cutting force and temperature fields in the tool and the chip by means of high-speed thermography were applied. The thermal images were analyzed with regard to thermodynamic energy balancing in order to derive the heat partition between tool, chips and workpiece. The thus calculated heat flow into the tool was subsequently used in order to analytically model the transient volumetric temperature fields in the tool. The described methodology enables the modeling of the transient thermal state in the cutting zone and particular in the tool, which is directly linked to phenomena like tool wear and workpiece surface modifications. 展开更多
关键词 Metal cutting infrared thermography heat sources transient temperature fields model based on Green's functions.
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Adaptive Optimal Control of a Heavy Lathe Operation
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作者 Viktor D. Kovalev Yana V. Vasilchenko Predrag Daasic 《Journal of Mechanics Engineering and Automation》 2014年第4期269-275,共7页
To create control laws of the cutting process on the heavy lathe, the temperature-force model of optimization of cutting conditions for turning was selected. The models to manage the process of cutting on heavy lathe ... To create control laws of the cutting process on the heavy lathe, the temperature-force model of optimization of cutting conditions for turning was selected. The models to manage the process of cutting on heavy lathe in real time were created. It was found that the optimization of the cutting process must be carried out according to the criteria: productivity, cost and tool life. The hardware structure of the adaptive control system for heavy lathe was developed and its dynamic performance was investigated. The system provides function of the cutting speed of adaptive control and the possibility of compensation of linear, nonlinear and temperature-related inaccuracies. Research results were implemented in the prototype of adaptive control system for heavy lathe and the integral complex of optimal control of an adaptive technological system. 展开更多
关键词 Heavy machine tool cutting tools power cutting performance.
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精冲技术的现状及展望 被引量:3
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作者 涂光祺 彭群 《锻造与冲压》 2005年第8期30-33,共4页
精冲是一种先进制造技术,具有优质、高效、低耗和面广的特点。所谓优质是指一次;中压即可获得尺寸精度IT7~IT8级,表面粗糙度砌为1.5~03μm,可直接装配的零件;和切削加工工艺相比往往可提高工效10倍以上,和铸、锻毛坯切削加工... 精冲是一种先进制造技术,具有优质、高效、低耗和面广的特点。所谓优质是指一次;中压即可获得尺寸精度IT7~IT8级,表面粗糙度砌为1.5~03μm,可直接装配的零件;和切削加工工艺相比往往可提高工效10倍以上,和铸、锻毛坯切削加工件相比,节能、节材显著;各种扁平类零件诸如:齿轮、棘轮、链轮、凸轮、杠杆、 展开更多
关键词 精冲技术 展望 现状 先进制造技术 切削加工工艺 表面粗糙度 切削工件 尺寸精度 提高工效
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