伺服压力机方案与设计

伺服压力机的工作原理与传统压力机不同.在总结其特点的基础上,提出不同工作机构伺服压力机的共同点及其技术方案和结构设计方法,利用恒转矩系统积蓄能量理论,推出伺服电机参数、电机轴侧总转动惯量、起动加速时间、制动器制动力矩的设计计算公式,并进行了曲柄、螺旋伺服压力机的设计与研制.结果表明,采用该设计方案的伺服压力机具有结构简单、工作可靠、价格较低的优点.     

专用闭模挤压液压机的研究与开发

介绍了针对闭模挤压工艺开发的闭模挤压专用液压机。该研究工作对于进一步开发本体结构精密、控制高度柔性的闭模挤压专用设备、发展NNSF和NSF具有参考价值。     

现代轿车制造业中的压力机

针对现代轿车的生产特点和实践，提出了适用于现代轿车制造业的压力机应具备的技术要求和维修要点。     

Effectiveness of different closed-loop control strategies for deep drawing on single-acting 3D Servo Presses

Process specific actuators and sensors embedded in the tooling can enable closed-loop control of product properties in manufacturing processes to achieve desired final component characteristics. Alternatively, actuation conducted by the machine tool used and sensors positioned within the machine, i.e., outside of the tool, could increase robustness and reduce investment and installation costs for closed-loop control systems. This contribution presents and compares different closed-loop control strategies for deep drawing and demonstrates the advantages of machine based actuators and sensors in experiments and simulations.     

伺服压力机工作能力设计

伺服压力机由重载伺服电机驱动,取消了飞轮、离合器以及制动器等耗能元件,完全靠电机扭矩工作,通过螺杆、多连杆等混合多级增力机构实现小电机出大力,再由电机驱动单元控制滑块的运动曲线.它具有智能化、柔性化、高精度、环保节能等优点.本文就伺服压力机的结构、参数、工作能力及功的输出、正确启动及制动、操作及监控等方面进行了工作能力的设计探讨.     

Method for the Optimization of Forming Presses for the Manufacturing of Micro Parts

In order to enable the efficient and economical production of micro parts with high demands on tolerances and accuracy, it is necessary to establish efficient, productive and dynamically optimized forming presses. This paper introduces a new simulation strategy for the optimization of high precision presses. A newly developed and existing prototype of a linear motor press was used to experimentally verify the simulation results. The experimental investigations, which especially focus on horizontal slide displacements under dynamic loads, showed a good correspondence with the results from the simulations. The presented innovative simulation strategy offers improved possibilities of evaluating and optimizing the dynamic press behavior in the early design process with a reduced effort of experimental optimization.     

开关磁阻数控螺旋压力机方案分析及控制参数设计

为了解决传统摩擦式螺旋压力机耗能高、不能数字化控制的问题,对无摩擦传动的新型开关磁阻数控螺旋压力机进行了研究,分析了螺杆旋转式、直动式和螺旋式机型的方案与特点,提出了滑块位移、速度、打击能量和打击力等参数控制原理、方案及其设计方法。实际应用与检测表明,开关磁阻数控螺旋压力机满足了用户按制件加工工艺数字化设置打击行程、打击能量和打击力的需求。该设备能够完全替换摩擦压力机,实现高效节能、智能数控的生产目标。     

Flexibility in metal forming

Flexibility in metal forming is needed more than ever before due to rapidly changing customer demands. It paves the way for a better control of uncertainties in development and application of metal forming processes. Although flexibility has been pursued from various viewpoints in terms of machines, material, process, working environment and properties, etc., a thorough study of the concept was undertaken in order to with problems of manufacturing competiveness and tackle new challenges of manufacturing surroundings. Therefore, in this paper, flexibility in forming is reviewed from the viewpoints of process, material, manufacturing environment, new process combinations and machine–system–software interactions.     

Scalability in manufacturing systems design and operation: State-of-the-art and future developments roadmap

The paper covers the main design, management and operational aspects of scalability in manufacturing systems (MS). It promotes scalability as an area of research of MS theory and practice in order to enhance techniques and methodologies in existing MS paradigms using advanced and emerging design and management approaches and ICT, and meet challenges of emerging MS paradigms and support their promotion and effective and efficient deployment in practice. The paper presents an introduction to scalability, state-of-the art in manufacturing and computer science, and related applications including manufacturing and education and a roadmap for future research and developments.     

Gain-scheduling control of machine tools with varying structural flexibility

The high accelerations occurring in present-day machine tools are likely to excite the vibration modes of the machine structure. These structural eigenfrequencies are not constant but depend on the position of the tool in its workspace. High performance motion controllers should take into account these varying resonances. This paper discusses the gain-scheduling control approach for an experimental set-up containing a flexible beam of which the stiffness depends on its length. H_∞-controllers are designed for several constant beam lengths and are linearly scheduled. Next to this ad-hoc scheduling, analytically scheduled controllers are synthesised. It is shown that the inherent conservatism in the design method limits the performance of the analytical approaches.     

Strategies to Optimize the Part Transport in Crossbar Transfer Presses

In order to keep the production of wide body components profitable, even in high-wage countries, the technology of crossbar transfer presses has been implemented into the stamping plants of automobile companies. In particular with large compliant parts, dynamic problems during the transportation have to be seen as one of the limiting factors for the production stroke rate. So far, there are no tools to investigate these problems in order to optimize the material handling. Based on the interaction of different simulation systems, a solution has been developed to predict these problems as early as during the construction process of a die. It becomes possible to calculate the ideal positions for the part holding suction-cups and to analyze the dynamic behavior of the stamping part during transportation, in order to enhance the productivity of the production plant. The results of the generic methodology have been verified by experimental research on compliant sheet metal parts of automotive industry.     

Measuring Flexibility in Investment Decisions for Manufacturing Systems

Investment decisions for manufacturing systems are primarily based on three characteristics: cost of purchase and operation, cycle time in connection with maximum capacity and achievable work piece quality. However, such considerations neglect another important criterion: the flexibility that allows a manufacturing system to adapt to future production requirements and structures. The major barrier in integrating flexibility into the decision-making process is the difficulty to measure and compare it due to upcoming production scenarios that are not ultimately definable. Therefore, this paper presents a methodical concept for the evaluation of manufacturing systems using real options in order to incorporate flexibility in the decision-making process.     

磁性材料液压机试制中出现若干现象的分析及解决方法

介绍磁性材料自动压制液压机试制过程中出现若干现象的分析和解决办法.     

基于3D打印技术的模具制造

本文以某限位块模具型芯为例,利用生产浪费最小、能量消耗最低、污染排放最小的3D打印技术理念生产制造,打破了传统的模具设计与制造方法,从而可以实现绿色模具和快速模具制造。     

典型液压机的3D打印模型结构设计研究

由于液压机零件多、尺度大,新产品研发、销售展示和教学实验中,采用3D打印技术可以缩短产品研发周期,降低制造成本。以三梁四柱液压机为例,从3D打印模型的机械强度、刚度、稳定性、材料节约性、整体美观性、实用性等要求出发,对模型结构优化、模型结构拆分打印、以及支撑结构优化等问题进行研究,提出适用于液压机3D打印模型的结构设计要求。     

泵控伺服液压机节能分析

以交流伺服电机和定量泵的可控油源组成新型泵控伺服液压机,它不但具有高的工作性能,而且可以明显减少能耗.本文分析了泵控伺服液压机的主要节能环节:容积调速、待机停止.以板材拉深为例,进行了普通液压机和伺服液压机能耗对比分析,新型伺服液压机具有显著节能效果,较普通液压机节能26.54%.     

最新伺服压力机的开发以及今后的动向

介绍了日本网野（AMINO）公司开发研制的电动伺服压力机的结构和工作特点，指出了几种不同驱动方法的电动伺服压力机的发展动向、使用实例和适用范围。     

基于Optistruct的伺服压力机机身拓扑优化

利用Hypermesh软件中的Optistruct模块建立了伺服压力机机身的三维有限元模型[1],对机身进行了静力和模态分析.应用渐进结构优化算法对机身进行了基于位移、应力和频率约束的拓扑优化,在满足压力机性能要求的条件下减轻了机身重量.为机身的合理设计与改进提供了可靠的依据.     

SDP-110型伺服压力机控制系统的开发研究

应用日本三菱公司运动控制器Q170MCPU、能源再生模块MR-J3-CV55K4和伺服电机HA-LP50K1M4进行了SDP-110型伺服压力机控制系统的开发.分析了伺服压力机基本结构及对控制系统要求,选择了控制系统的结构方案,讨论了系统软件模块的结构组成,并对主要软件模块的技术实现进行了介绍.     

Servo scanning 3D micro-EDM based on macro/micro-dual-feed spindle

Using the end discharge of micro-rod-shaped electrode to scan layer by layer, micro-electrical discharge machining (EDM) can fabricate complex 3D micro-structures. During the machining process, the discharge state is broken frequently due to the wear of the tool electrode and the relative scanning motion. To keep a favorable discharge gap, the feed spindle of the tool electrode needs the characteristics of high-frequency response and high resolution. In this study, an experimental system with a macro/micro-dual-feed spindle was designed to improve the machining performance of servo scanning 3D micro-EDM (3D SSMEDM), which integrates an ultrasonic linear motor as the macro-drive and a piezoelectric (PZT) actuator as micro-feeding mechanism. Based on LabVIEW and Visual C++ software platform, a real-time control system was developed to control coordinately the dual-feed spindle to drive the tool electrode. The micro-feed motor controls the tool electrode to keep the favorable discharge gap, and the macro-drive motor realizes long working range by a macro/micro-feed conversion. The emphasis is paid on the process control of the 3D SSMEDM based on macro/micro-dual-feed spindle for higher machining accuracy and efficiency. A number of experiments were carried out to study the machining performance. According to the numerical control (NC) code, several typical 3D micro-structures have been machined on the P-doped silicon chips. Our study results show that the machining process is stable and the regular discharge ratio is higher. Based on our fundamental machining experiments, some better-machined effects have been gained as follows. By machining a micro-rectangle cavity (960 μm×660 μm), the machined depth error can be controlled within 2%, the XY dimensional error is within 1%, the surface roughness R_a reaches 0.37 μm, and the material removal rate is about 1.58×10⁴ μm³/s by using a tool electrode of Φ=100 μm in diameter. By machining multi-micro-triangle cavities (side length 700 μm), it is known that the machining repeatability error is <0.7%.