多工位卧式组合机床的控制系统设计

为解决加压过滤机中滤液管加工效率低、加工设备可靠性差等问题,根据组合机床的结构特点及滤液管加工要求,对组合机床动力头和液压滑台的控制方案进行了重新设计,研发了一种全新卧式专用组合机床电气控制系统。该控制系统可以实现一次加工便完成整个工件的加工流程,保证了加工工件的中心一致性。合理安排各动力头的动作过程及时间,一个加工循环中可节约40s,提高了加工效率并保证了工件质量。为以后卧式组合机床的控制系统优化设计提供了宝贵经验。     

基于AutoCAD的停车设备组合机床自动数控编程算法

在停车设备用型材加工中,为了实现CAD软件与数控机床加工之间的数据共享,提出一种适用于专用组合机床的自动编程算法.介绍了程序格式、数据预处理方法和程序生成方法,并在九通道二十一轴停车设备型材组合机床上进行了成功实施,验证了基于本算法的自动编程系统的有效性.     

基于PLC的全自动轴加工组合机床

文章在分析轴类零件传统加工工艺的基础上,推出了一种基于PLC控制的轴加工组合机床,阐述了其机械结构与控制系统,该机床将铣削动力头、钻削动力头和刷油器对称直线布置,采用气缸实现工件的装卸与各工位的往复循环,该组合机床各功能部件对称直线布置的这一结构特点,为其结构的简化与功能的柔性化奠定了良好的基础,是一款加工轴类及箱体类工件的经济实用型专用设备.     

数控铣削模糊自适应控制系统

对数控加工中心控制系统进行了分析和建模,提出了一套应用于数控铣削加工设备的模糊自适应控制方案,并进行了系统仿真.该系统可通过实时负载反馈实现主轴电机恒功率控制,达到提高机床加工效率,降低生产成本的目的.     

汽车换挡杆钻铣专用机床设计

针对汽车换挡杆钻、铣工序的特点,提出将它们进行工序集中,采用自动化钻铣专用机床来提高加工效率。设计的自动化钻铣专用机床包括上料和钻孔、铣槽、卸料等3个工位,采用"上料→装夹→钻孔→铣槽→卸料"工艺流程完成换挡杆钻铣加工。上料装置由分料装置和送料装置组成,实现"分料→送料"的上料过程。液压夹具采用V形块和侧面支撑板作为定位元件,采用4个液压缸实现8个工件的夹紧。钻削头和铣削头调节装置可用来调节钻头、铣刀与工件之间的相对位置,因此该机床可用来实现工艺相同、尺寸不同的相似零件的钻、铣加工,扩大了机床的加工范围。实践表明:采用该专用机床大大缩短了生产辅助时间,钻、铣加工效率可提高3倍以上;加工过程全自动化,一个工人可以同时看管多台专用机床,可减少劳动力需求75%以上,从而大大降低换挡杆加工成本。     

铝塑型材锯铣组合加工中心

分析了铝塑型材锯铣加工的特点及功能要求，提出了应用通用数控装置开发专用控制系统的解决方案，实现了铝塑型材锯铣组合数控加工，显著提高了生产效率和加工质量的稳定性。     

用挤压法加工薄壁圆钢管相贯线

用挤压法加工薄壁圆钢管相贯线广东花县金属家具厂蔡业松在金属家具等轻工产品上，不少为薄壁圆钢管焊接结构，其接头要求相贯。常用加工相贯线的方法有冲切法，铣削法，钻削法、磨削法，火焰切割法及电弧切割法等。其中效率最高的要数冲切法。笔者根据本厂产品的特点，采...     

1HYA系列长台面型液压滑台

1HYA系列长台面型液压滑台是根据JB2502—78《组合机床通用部件——滑台(长台面型)参数、互换尺寸》设计的。 该系列液压滑台是配置小型组合机床及其自动线的基础动力部件,用以完成进给运动。它可根据被加工零件的工艺要求,在其上安装动力箱(并配以多轴箱)、单轴钻削头、单轴镗削头、单轴攻丝头、镗孔车端面头与单轴铣削头等主切削动力部件,可以完成钻、扩、铰、锪端面、倒角、攻丝、镗孔、车端面及铣削等工序。在滑台上也可安装检测装置,用来完成自动检测工序的进给动作。     

组合机床动力部件刚度测量装置

介绍一种用于组合机床动力部件(动力滑台、钻削头、镗削头和铣削头)刚度的测量装置.图1幅。     

发动机缸体卧式铣削组合机床设计

通过分析发动机缸体自动加工生产线的整个生产工艺规划并结合多年生产线工艺规划经验,根据生产线的输送形式及加工参数,确定了各个工序工件姿态及加工内容,进而确定了卧式单面铣削组合机床的整体方案,设计了专用夹具、强力铣削头、专用液压自锁等结构,说明了各自的工作原理。通过机床的设计和制造,测得精度和效率均达到了设计要求。此机床已经在某企业投入使用。     

水下单壁桩钻铣切割机设计及验证

针对水下单壁钢桩切割作业需求，设计并制造水下液压钻铣切割机，以立铣刀为切割工具，使用液压缸进给、液压马达驱动铣刀钻铣及回转切割，完成切割作业。对设备的设计依据及设备的组成进行了详细描述，分析钻铣刀、驱动马达、传动系统等参数的选用，并根据设计方案制造样机。通过对水下液压钻铣切割样机的海上及车间测试，验证设备可靠性，得出样机切割效率、铣刀消耗参数等数据。实际测试表明：该设备运行可靠，且该设备加工、使用及维护成本低，适合水下单壁钢桩切割推广使用。     

大尺寸薄壁铸件切削加工组合机床设计

对纺织机中墙板零件的特点进行了分析,制定了大尺寸面薄壁型墙板组合机床加工的定位夹紧方案;设计中扩铰复合刀的使用简化了加工工艺,提高了生产率且使得组合机床的布置更紧凑;加工中,采用了移动工位和固定工位相结合的方式,合理安排了墙板零件切削时序,解决了大尺寸面薄壁件铣、镗、扩、铰、钻多种切削类型组合加工的难题,提高了墙板的制造精度。     

An integrated prediction model including the cutting process for virtual product development of machine tools

Recently activities for shortening the development time of machine tools and demands for high-value products are consistently being increased. As a result, many studies for predicting the performance in design stage have been conducted to solve these issues. So far, most manufacturers of machine tools have verified designs excluding the cutting process, even though the main performance is the machining quality of the workpiece. Therefore, it has been required to consider together the cutting process model for analyzing the machining quality before the manufacturing of the prototype. This paper presents an integrated dynamic model considering the all interaction of the machine structure, the control system, and the cutting process. The modal truncation technique using the steady-state dynamic analysis in a selected location and frequency range of interest is applied to increase the efficiency of mechatronics simulations including the cutting process. In particular, this proposed prediction model allows accurate design verifications for high-speed machines because it reflects the influences of the high inertia forces and the contour errors caused by high feed rate. Several peripheral milling applications were demonstrated in order to show the feasibility of the proposed prediction model, and we confirmed the superiority of prediction by comparing the simulated and measured results in high feed milling.     

高速铣在汽车零部件模具制造中的高效应用

叙述了高速切削原理,如何确定切削参数及刀具轨迹,对应数控系统和机床设定余量、进给率、主轴转速、进刀方式和刀具轨迹的圆滑过渡等参数,并结合CAM特色,实现高速铣削编程,提高模具制造的效率及质量。     

激光打孔机床控制系统设计与分析

激光加工机床近年来广泛应用于航空、航天、兵器、电子、核工业等国防工业,以及汽车、机车、机械制造等民用行业。针对透平机械上的火焰筒气膜孔的加工及薄壁零件异形孔切割,介绍一种基于YAG固体激光器的激光打孔机的结构。该打孔机选用FAGOR数控系统、日本HARMONIC驱动器及力矩电机构成打孔机的五轴结构。详细分析系统调试参数对激光制孔工艺的影响。试验结果表明,机床结构加工性能良好,该控制模式具有很好的通用性,可用于其他类型的激光加工机床。     

Chemical Assisted Laser Machining for The Minimisation of Recast and Heat Affected Zone

Laser processing techniques have been widely used for high speed, high accuracy subtractive manufacturing such as cutting, drilling, milling and micro-machining. Most of these processes are based on thermal mechanisms. For the machining of metallic materials, a layer of recast and heat affected zone is normally present on the laser-machined components. This paper reports a novel technique that aims to minimize such heat affects and at the same time to improve the material removal efficiency. A relatively environmentally friendly salt solution, in contact with the beam-material interaction point, was used in this study to enable material removal to be based on laser activated thermal-chemical mechanism. It has been shown that, not only the recast layer can be removed during the processing, the material removal rate can be increased up to 300% for 316 stainless steel work piece.     

Active brazed ceramic cemented carbide compound drills for machining lamellar graphite cast iron

The optimum and efficient way of machining is linked to the choice of the most appropriate cutting tool and cutting tool material. High performance cutting ceramics are characterized by excellent hardness properties at elevated temperatures. For this reason, cutting ceramics meet the requirements for machining with high cutting speeds to increase process productivity. Whereas cutting ceramics are widely used in turning and milling operations, their use in drilling processes, using ceramic insert tipped tools, is limited to larger diameter applications due to design restrictions. Beyond small diameters, solid ceramic tools were of negligible interest for industrial applications owing to their excessive tool manufacturing costs. This paper presents a new tool concept which addresses this challenge and permits a more productive machining process for drilling small diameter holes using ceramics as the cutting material. An active brazed compound drill combines the advantageous properties of ceramics and cemented carbide as the cutting tool material and basic holder material, respectively. The investigations presented here describe the manufacturing chain as well as the application of a compound drill, and compares it to a widely used industrial reference tool.     

地轨式激光切割机分区除尘装置设计

本文介绍了一种地轨式激光切割机分区除尘装置,可高效抽除切割过程中产生的烟尘,很好地保护激光切割头,大大改善工作环境,提高激光切割机的使用效率。     

数控切削性能的Fuzzy-PID控制算法的设计与仿真

随着零件加工精度的日益提高及外界干扰因素的不断增加,传统PID控制的数控加工过程已不能满足目前切削性能的需求,如何使数控机床在加工中仍然保持优越的切削性能是目前制造领域研究的热点问题之一.根据数控切削加工系统的组成结构,建立了切削系统的数学模型.通过分析单位阶跃响应的误差曲线,归纳了PID参数自调整的模糊规则,并完成了一套与切削系统相匹配的Fuzzy-PID算法的设计.经动态性能、抗干扰性能和鲁棒性能的仿真实验分析,结果表明与传统PID算法相比,Fuzzy-PID算法应用于切削系统中具有更良好的品质.