中板二辊轧机压下蜗轮异常磨损原因的分析及对策

中板二辊轧机压下蜗轮异常磨损问题,常规检测及从装配上难以查明原因,而从蜗轮蜗杆设计和金加工上分析,找出了其损坏机理及对策。     

钢管平端倒棱机自动控制系统

本文介绍了衡阳钢管平端倒棱工艺过程及设备,重点描述了平端倒棱机控制系统的硬件构成和软件设计以及基于FM354功能模块和伺服驱动装置SIMODRIVE 611A的刀架位置伺服控制系统.     

孔口倒圆角的编程方法

加工孔口倒圆角时，通常可以用成型刀来加工。但是当倒角半径比较特殊时用传统的方法加工就比较困难。文章通过举例的方式介绍了如何用普通立铣刀、球头刀，借助宏程序完成孔口倒圆角几种方法，并对加工效果进行比较。     

Impedance controlled human–robot collaborative tooling for edge chamfering and polishing applications

Surface finishing, as the final stage in the manufacturing pipeline, is a key process in determining the quality and life span of a product. Such a task is characterized by low contact forces and minimal material removal from the object surface. Despite the advancements in machine learning and artificial intelligence, human workforce is still irreplaceable in performing such tasks due to superior dexterity and adaptability, but this is often prone to risks such as hand-arm vibration syndrome due to hand-held tools. Therefore, we propose a collaborative approach to assist the human in carrying out such tasks with the help of two case studies: Human–Robot-Collaborative edge chamfering and polishing tasks, based on an impedance controlled collaborative curve tracing technique.We propose a collaborative framework, where the robot assists an operator to guide the end-effector/tool along a pre-defined parametric curve. The algorithm is demonstrated in two scenarios. In the first case, we address a collaborative chamfering task whereas the second case focuses on a polishing application (for straight edges). For these kinds of tasks, the curve to be traced assumes the shape of a straight line along the edge. We make use of the compliant feature of a cobot, which allows the user to physically guide the robot in the task space, to generate a mathematical model for the tool path. From the end-user perspective, this is more intuitive than the classical programming-based path planning approaches. In the process of machining, to enhance the path tracking accuracy and to ensure constant tool-surface contact, we implement guidance virtual fixtures through impedance control. As a result, the machining error is reduced.     

齿轮倒棱刀的设计风格及对比分析

齿轮倒棱刀根据设计风格可分为经典设计倒棱刀和现代设计倒棱刀。本文对这两类倒棱刀的设计原理深入探究,找出设计上的根本区别。从可加工范围、强度、表面质量、根部倒棱四个方面展开全面对比分析。为整体把握倒棱刀设计,合理选择设计风格,取长补短提供理论依据。     

双联齿轨轮齿形圆弧倒角刀具的设计及应用

随着煤矿向高产高效方向的发展,采煤机的牵引力和牵引速度也在相应增大,对齿轨轮强度的要求越来越高。为解决齿轨轮因断齿而失效问题,对双联齿轨轮的断口进行了分析,找出其断齿失效的主要原因,并进行了技术攻关。     

斜削对折曲胶接接头的应力分布影响

采用弹塑性有限元法,研究了被粘物自由端外侧、内侧斜削角度对铝合金单搭接折曲接头中应力分布的影响。结果表明:被粘物自由端经外斜削处理后,胶层中间段的各应力分布无明显变化;外斜削角度越大,剥离应力峰值越高;被粘物自由端经内斜削处理后,内斜削角度越小,胶层端部的轴向应力峰值、剪切应力峰值越小,但剥离应力峰值越大。综合考虑胶层中部的应力分布情况,选择内斜削角度为5°时较适宜。     

钢管倒棱机新型液压夹紧装置的改造

倒棱工序是钢管制造中的重点工序，夹紧装置的夹紧效果意识风管管端的加工质量，本文就传统夹紧装置所存在的缺点和不足进行了分析，指出了新型液压夹紧装置的优点和良好的使用效果。     

一种新型倒角装置

介绍了一种用于对塑料管材进行倒角的装置。通过该装置,可以解决在塑料管材安装过程中因端面倒角不理想而导致的渗漏问题。该装置由定位套及旋转驱动装置构成,结构简单,使用方便。     

基于Master CAM的采煤机齿轨轮三维倒角编程应用

随着煤矿向高产高效方向的发展,采煤机的牵引力、牵引速度大幅提高,对齿轨轮强度的要求也越来越高。文中介绍将CAM技术用于实际加工中,提高了加工制造的精度,对解决齿轨轮断齿等失效问题起到关键性作用。