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学者姓名：刘志峰
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Abstract ：
A method has been developed to quantify the bearing surface friction coefficient in bolted joints based on the mechanics of the tightening process. By measuring the surface topography under different tightening torques, a strong correlation between the variation of the microscopic topography and the friction coefficient was revealed. The friction coefficient initially decreases and subsequently increases due to surface wear and microstructural transformations. A genetic algorithm (GA) and backpropagation neural network (BP) were employed to create a predictive model, optimizing network parameters for enhanced learning efficiency and accuracy. The experimentally validated GA-BP prediction model forecasts friction behavior with a maximum relative error of 3.57 %, offering valuable insights for the design and optimization of bolted joints.
Keyword ：
Friction coefficient Friction coefficient GA-BP prediction model GA-BP prediction model Bolted joints Bolted joints Surface topography Surface topography
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| GB/T 7714 | Chen, Wentao , Li, Ying , Liu, Zhifeng et al. Prediction model for bearing surface friction coefficient in bolted joints based on GA-BP neural network and experimental data [J]. | TRIBOLOGY INTERNATIONAL , 2024 , 201 . |
| MLA | Chen, Wentao et al. "Prediction model for bearing surface friction coefficient in bolted joints based on GA-BP neural network and experimental data" . | TRIBOLOGY INTERNATIONAL 201 (2024) . |
| APA | Chen, Wentao , Li, Ying , Liu, Zhifeng , Zhang, Caixia , Zhao, Yongsheng , Yan, Xing . Prediction model for bearing surface friction coefficient in bolted joints based on GA-BP neural network and experimental data . | TRIBOLOGY INTERNATIONAL , 2024 , 201 . |
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Abstract ：
Threaded fasteners are one of the most commonly used connection methods for mechanical structures. Its primary function is to generate appropriate clamping forces and fasten the connected parts. An inappropriate preload can cause loosening, fatigue fracture, and other problems. This will affect the safety and reliability of mechanical equipment. The precise control of the preload has become a critical issue in mechanical assembly processes. Over the past few decades, various tightening measures and methods have been proposed to address this issue. However, many problems continue to exist with practical applications that have not been reviewed comprehensively and systematically. First, various control methods were summarized systematically, and their advantages and disadvantages in engineering applications were analyzed. Torque control is the most widely used tightening method owing to its simple operation and low cost. Therefore, the research on the torque control method was summarized systematically from three aspects: the torque-preload correlation formula, effective friction radius, and friction characteristics during tightening. In addition, the special circumstances that may increase preload uncertainty were discussed. Finally, based on a summary of the current research status, the prospects for future research were discussed. This study would aid researchers in extensively understanding the problems in preload control.
Keyword ：
Threaded fasteners Threaded fasteners Torque control method Torque control method Friction characteristics Friction characteristics Preload Preload Tightening method Tightening method
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| GB/T 7714 | Yan, Xing , Liu, Zhifeng , Zheng, Mingpo et al. Preload Control Method of Threaded Fasteners: A Review [J]. | CHINESE JOURNAL OF MECHANICAL ENGINEERING , 2024 , 37 (1) . |
| MLA | Yan, Xing et al. "Preload Control Method of Threaded Fasteners: A Review" . | CHINESE JOURNAL OF MECHANICAL ENGINEERING 37 . 1 (2024) . |
| APA | Yan, Xing , Liu, Zhifeng , Zheng, Mingpo , Li, Ying , Wang, Yuezhen , Chen, Wentao . Preload Control Method of Threaded Fasteners: A Review . | CHINESE JOURNAL OF MECHANICAL ENGINEERING , 2024 , 37 (1) . |
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Abstract ：
本发明涉及输电线路自动化维修技术领域，公开了一种强风下输电导线状态偏差测量实验平台及测量方法，包括风机、风力调节机构、支撑机构、位置调节机构和风力检测机构，支撑机构设置有底板，底板上侧设置有半环形突起，底板上表面半环形突起内部固定安装有三角板，三角板为三角形，风力调节机构设置有升降台、安装盒和第一升降组件，风机固定安装在升降台上侧，第一升降组件安装在安装盒内，安装盒滑动安装在底板半环形突起内壁上；位置调节机构设置有固定块，固定块滑动安装在三角板内侧，风力检测机构设置有风杯、电路盒和第二升降组件，本发明实现了能够真实有效模拟强风干扰下的输电导线状态变化。
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| GB/T 7714 | 许静静 , 陶龙 , 刘志峰 et al. 一种强风下输电导线状态偏差测量实验平台及测量方法 : CN202310962750.6[P]. | 2023-08-02 . |
| MLA | 许静静 et al. "一种强风下输电导线状态偏差测量实验平台及测量方法" : CN202310962750.6. | 2023-08-02 . |
| APA | 许静静 , 陶龙 , 刘志峰 , 陈建洲 . 一种强风下输电导线状态偏差测量实验平台及测量方法 : CN202310962750.6. | 2023-08-02 . |
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Abstract ：
The superior performance of machining large parts with the free-form surface is demonstrated by a five-axis gantry machine tool composed of a gantry mainframe and a milling head. A turntable is used to adjust the position of the workpiece rather than a linear guideway when machining impellers or integral turbines. Furthermore, collisions between adjacent blades are almost unavoidable in the machining region, which is relatively narrow for milling heads. The majority of existing methods attempt to solve the problem by changing the tool's tilt angle. However, when an end-mill cutter is employed, this method will deteriorate surface quality and reduce efficiency. On the condition that the milling head has three rotary axes (TRA), a novel NC code generation method with a fixed tool orientation vector for narrow space surfaces is proposed in this paper. When the geometrical model, considered a supplementary condition, is combined with the kinematics model, an inverse kinematics solution to a general multi-axis gantry machine tool with a TRA milling head is obtained. The problem of multi-axis coupling in the inverse kinematics model is solved by combining the iteration method and geometrical model. In the narrow space for a milling head, the redundant degree of freedom, provided by a machine tool equipped with a TRA milling head, enables adjusting the posture of the milling head without changing the tool orientation vector. Feature points are extracted by preprocessing points selected from machined parts and the TRA milling head to choose the feasible posture and simulate the machining process. Collisions in the narrow space are successfully avoided throughout the cutting process. The NC code generation method is verified on CAM software and cut experiments, proven effective in this paper.
Keyword ：
Collision avoidance Collision avoidance Tool path generation method Tool path generation method Inverse kinematics Inverse kinematics Five-axis machining Five-axis machining
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| GB/T 7714 | Cao, Zirui , Zhao, Yongsheng , Wang, Ruiyao et al. A novel collision-free NC code generation method with fixed tool orientation vector using the geometric decoupling strategy based on the three rotary axes milling head [J]. | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY , 2022 , 122 (7-8) : 3255-3279 . |
| MLA | Cao, Zirui et al. "A novel collision-free NC code generation method with fixed tool orientation vector using the geometric decoupling strategy based on the three rotary axes milling head" . | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 122 . 7-8 (2022) : 3255-3279 . |
| APA | Cao, Zirui , Zhao, Yongsheng , Wang, Ruiyao , Yang, Congbin , Wang, Yida , Liu, Zhifeng . A novel collision-free NC code generation method with fixed tool orientation vector using the geometric decoupling strategy based on the three rotary axes milling head . | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY , 2022 , 122 (7-8) , 3255-3279 . |
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Abstract ：
A large-scale manufacturing workshop includes a wide variety and a large amount of equipment. When equipment is mapped as a digital twin (DT) model, the DT model has complex and implicit or non-hierarchical relationships, which makes the development of a DT workshop system (DTWS) for a manufacturing plant challenging. To address this problem, this paper proposes a rapid construction method of equipment model (RCMEM) for a discrete manufacturing DT workshop system, which can meet the requirements of complex manufacturing business scenarios, improve the efficiency and quality of the DT model construction at the equipment level, and form an efficient equipment model construction method. First, a DT object (DTO), which represents a basic unit of the DT model, is defined. The DTO is used to derive the DT model at the equipment level. The DTO collects and wraps generalization-capable functions from equipment into components, and geometric, functional, and communicative descriptions are combined into a single model. The DT model can increase the scalability, reusability, and modeling quality by reusing the DTO capabilities. Further, a general construction process of the DTO model of multi-axis computer numerical control (CNC) machines is presented. This process standardizes the common capabilities of the equipment models and minimizes the construction time of machines' DT models. Furthermore, a rapid mounting and communication configuration mechanism (RMCCM) is proposed. This mechanism enables fast DTO network communication and improves interoperability in a multi-source data environment. This paper also proposes a DTWorks Software development kit, which can help developers to build digital factory standalone applications. The RCMEM is implemented into the DTWorks. Finally, a real DTWS case is used to examine the differences in equipment model building before and after the application of the RCMEM. The results demonstrate the good effectiveness of the RCMEM in complex business settings.
Keyword ：
Rapid construction method Rapid construction method System framework System framework Digital twin system Digital twin system Digital twin Digital twin
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| GB/T 7714 | Zhang, Yueze , Zhang, Caixia , Yan, Jun et al. Rapid construction method of equipment model for discrete manufacturing digital twin workshop system [J]. | ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING , 2022 , 75 . |
| MLA | Zhang, Yueze et al. "Rapid construction method of equipment model for discrete manufacturing digital twin workshop system" . | ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING 75 (2022) . |
| APA | Zhang, Yueze , Zhang, Caixia , Yan, Jun , Yang, Congbin , Liu, Zhifeng . Rapid construction method of equipment model for discrete manufacturing digital twin workshop system . | ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING , 2022 , 75 . |
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Abstract ：
可靠性分配是数控机床可靠性优化设计的重要任务,传统上可靠性分配方法存在分配影响因子单一和主观经验过多等缺陷。为了解决这些问题,运用主客观相结合的方法,综合考虑了多种影响因素,根据影响因素重要性给予不同的直觉梯形模糊数,运用最大熵有序加权算子(ME-OWA)赋予影响因素有序的权重最后综合多位专家判断,利用逼近理想点排序法(TOPSIS)来灵活分配子系统的可靠性。通过以数控机床八个子系统例分析并且与传统的FOO与模糊分配方法比较,证明了所提出的方法有效性、准确性。
Keyword ：
数控机床 数控机床 TOPSIS TOPSIS 直觉梯形模糊数 直觉梯形模糊数 ME-OWA ME-OWA 可靠性分配 可靠性分配
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| GB/T 7714 | 赵永胜 , 丁紫远 , 杨聪彬 et al. 直觉梯形模糊数与熵权-TOPSIS的可靠性分配 [J]. | 组合机床与自动化加工技术 , 2022 , PageCount-页数: 6 (01) : 76-80,84 . |
| MLA | 赵永胜 et al. "直觉梯形模糊数与熵权-TOPSIS的可靠性分配" . | 组合机床与自动化加工技术 PageCount-页数: 6 . 01 (2022) : 76-80,84 . |
| APA | 赵永胜 , 丁紫远 , 杨聪彬 , 程强 , 刘志峰 . 直觉梯形模糊数与熵权-TOPSIS的可靠性分配 . | 组合机床与自动化加工技术 , 2022 , PageCount-页数: 6 (01) , 76-80,84 . |
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Abstract ：
提升重型数控机床的加工精度是高端装备领域的研究热点，然而关于基础沉降变形对机床精度的影响这一问题却少有研究。为了研究由基础沉降变形引起重型数控机床加工精度变化的规律，基于欧拉伯努利梁单元理论，考虑基础和机床相互耦合作用关系，建立起机床结构-基础系统的一体化变形协调方程，以横梁中点位姿变化为目标，进行整体刚度矩阵求解过程中的节点坐标标定方案分析；根据相似理论，构造重型数控机床-基础系统的缩尺模型，分析设计的缩尺模型和机床原尺模型之间静力位移变形关系，给出缩尺模型和原尺模型的映射规律，为有效解决基础沉降引起的机床精度变化和精度补偿提供依据和技术支撑。
Keyword ：
缩尺模型 缩尺模型 基础沉降 基础沉降 梁单元 梁单元 相似理论 相似理论 重型数控机床 重型数控机床
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| GB/T 7714 | 张建涛 , 刘志峰 , 李彦生 et al. 基于相似理论的重型数控机床-基础系统位移变形研究 [J]. | 机械工程学报 , 2022 , 58 (07) : 309-316 . |
| MLA | 张建涛 et al. "基于相似理论的重型数控机床-基础系统位移变形研究" . | 机械工程学报 58 . 07 (2022) : 309-316 . |
| APA | 张建涛 , 刘志峰 , 李彦生 , 姜凯 , 杨聪彬 , 张彩霞 . 基于相似理论的重型数控机床-基础系统位移变形研究 . | 机械工程学报 , 2022 , 58 (07) , 309-316 . |
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Abstract ：
长期以来，我国以数控机床为代表的装备制造业重点产品技术差距缺乏量化测度研究，导致无法用客观的表征方法来衡量和评价数控机床技术发展水平。针对以上问题，从共性技术、典型主机产品、数控系统和关键功能部件4个方向出发进行技术要素项细分，构建了对标世界先进领先水平的高档数控机床技术差距评价体系；提出我国机床技术水平与国际（地区）先进水平的年代差距量化表征方法；建立了基于模糊数据处理的分项技术水平评价模型、共性技术产品水平评价模型和产品关键技术综合评价模型。最后，基于该体系进行了大样本数据调研，基于评价模型进行了机床技术年代差距量化分析，评价结果可为政府科学决策及行业发展规划提供重要支撑。
Keyword ：
机床技术差距 机床技术差距 模糊数据处理 模糊数据处理 评价体系 评价体系 差距量化表征 差距量化表征 技术评价模型 技术评价模型
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| GB/T 7714 | 苏铮 , 李丽 , 许静静 et al. 基于模糊数据处理的我国机床技术差距评价体系 [J]. | 制造技术与机床 , 2022 , PageCount-页数: 8 (06) : 84-91 . |
| MLA | 苏铮 et al. "基于模糊数据处理的我国机床技术差距评价体系" . | 制造技术与机床 PageCount-页数: 8 . 06 (2022) : 84-91 . |
| APA | 苏铮 , 李丽 , 许静静 , 刘炳业 , 刘志峰 , 杨聪彬 . 基于模糊数据处理的我国机床技术差距评价体系 . | 制造技术与机床 , 2022 , PageCount-页数: 8 (06) , 84-91 . |
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Abstract ：
为提高滚珠丝杠副的定位精度,提出了一种复合载荷作用下考虑滚珠几何误差的双螺母滚珠丝杠副载荷分布模型,分析了在不同轴向载荷和径向载荷复合作用下所有滚珠接触载荷分布状况,在此基础上分析了滚珠几何误差对滚珠动静态接触载荷分布的影响。仿真分析结果表明:本文提出的载荷分布模型对提高滚珠丝杠副的位置精度预测及其定位误差补偿有较好的参考意义。
Keyword ：
滚珠丝杠副 滚珠丝杠副 结构误差 结构误差 双螺母 双螺母 接触载荷 接触载荷
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| GB/T 7714 | 程强 , 王畅 , 齐宝宝 et al. 虑及结构参数误差的滚珠丝杠接触载荷建模与分析 [J]. | 吉林大学学报(工学版) , 2022 , 52 (02) : 353-360 . |
| MLA | 程强 et al. "虑及结构参数误差的滚珠丝杠接触载荷建模与分析" . | 吉林大学学报(工学版) 52 . 02 (2022) : 353-360 . |
| APA | 程强 , 王畅 , 齐宝宝 , 张彩霞 , 杨聪彬 , 刘志峰 . 虑及结构参数误差的滚珠丝杠接触载荷建模与分析 . | 吉林大学学报(工学版) , 2022 , 52 (02) , 353-360 . |
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Abstract ：
滚珠丝杠副是数控机床机械传动的重要部件，机床切削参数的不断变化致使其承受的轴向负载具有动态时变的特性，进而其精度、预紧力、摩擦力矩等性能的衰退呈现出时变特性.为了研究滚珠丝杠副在时变轴向加载工况下的性能变化规律，在建立时变受力模型的基础上，通过弹性赫兹理论推导建立了时变轴向力工况下双螺母滚珠丝杠副的时变受力模型、时变磨损模型、时变预紧力和摩擦力矩衰退模型，并且通过滚珠丝杠副精度保持性试验台用激光干涉仪测量序进轴向力加载与恒定轴向力加载工况下的滚珠丝杠磨损深度变化情况，与理论模型对比，由此验证滚珠丝杠副时变轴向力加载性能衰退模型的有效性与合理性.论文的研究对于提升精密滚珠丝杠副的精度及其保持性具...
Keyword ：
时变轴向载荷 时变轴向载荷 磨损规律 磨损规律 摩擦力矩 摩擦力矩 预紧力衰退 预紧力衰退 滚珠丝杠副 滚珠丝杠副 加速退化试验 加速退化试验
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| GB/T 7714 | 程强 , 计冬雪 , 初红艳 et al. 时变轴向力负载影响下滚珠丝杠副性能衰退特性 [J]. | 北京工业大学学报 , 2022 , 48 (05) : 457-465,551 . |
| MLA | 程强 et al. "时变轴向力负载影响下滚珠丝杠副性能衰退特性" . | 北京工业大学学报 48 . 05 (2022) : 457-465,551 . |
| APA | 程强 , 计冬雪 , 初红艳 , 齐宝宝 , 郝小龙 , 刘志峰 . 时变轴向力负载影响下滚珠丝杠副性能衰退特性 . | 北京工业大学学报 , 2022 , 48 (05) , 457-465,551 . |
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