【外文翻译】高速钻床的动力学分析（520）.doc
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【外文翻译】高速钻床的动力学分析（520）,摘要通常情况下，术语“高速钻床”就是指具有较高切削速率的钻床。高速钻床(hsdm)也是指具有非常快的和正确的点到点运动的钻床。新的hsdm是由带有两个直线电动机的平面并联机构组成。本文主要就是对并联机器(pkm)的动力学分析。运动合成是为了介绍一种新方法，它能够完善钻孔操作和点到点定位的准确性。动态合成旨在减少因使用弹...
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摘要
通常情况下，术语“高速钻床”就是指具有较高切削速率的钻床。高速钻床(HSDM)也是指具有非常快的和正确的点到点运动的钻床。新的HSDM是由带有两个直线电动机的平面并联机构组成。本文主要就是对并联机器(PKM)的动力学分析。运动合成是为了介绍一种新方法，它能够完善钻孔操作和点到点定位的准确性。动态合成旨在减少因使用弹簧机械时PKM的输入功率。
关键词: 并联运动机床; 高速钻床; 动力学的合成
1.介绍
在最近的几年里，研究所和工业协会介绍了各式各样的PKM。其中大部分（但不是所有）,以众所周知的斯图尔特月台[1]为基础结构。这一做法的好处是高公称的负载重量比，良好的位置精度和结构刚性[2]。斯图尔特式PKM的主要缺点是相对小的工作空间和相对慢的操作速度 [3,4]。机床刀具的工作空间是指刀尖能够移动和切削材料所需要的容积。平面的斯图尔特月台的设计在[5]中被提到，像是对无CNC机器作翻新改进的方法需要塑料的铸模机制一样。PKM[5]的设计允许可以调整几何学已经被规定了的最佳的再配置的任何路径。 一般的，改变一根或较多连杆的长度是以PKM受约束的顺序来做几何学的调整。
Abstract
Typically, the term‘‘high speed drilling’’ is related to spindle capability of high cutting speeds. The suggested high speed drilling machine (HSDM) extends this term to include very fast and accurate point-to-point motions. The new HSDM is composed of a planar parallel mechanism with two linear motors as the inputs. The paper is focused on the kinematic and dynamic synthesis of this parallel kinematic machine (PKM). The kinematic synthesis introduces a new methodology of input motion planning for ideal drilling operation and accurate point-to-point positioning. The dynamic synthesis aims at reducing the input power of the PKM using a spring element.
Keywords: Parallel kinematic machine; High speed drilling; Kinematic and dynamic synthesis
1. Introduction
During the recent years, a large variety of PKMs were introduced by research institutes and by industries. Most, but not all, of these machines were based on the well-known Stewart platform [1] configuration. The advantages of these parallel structures are high nominal load to weight ratio, good positional accuracy and a rigid structure [2]. The main disadvantages of Stewart type PKMs are the small workspace relative to the overall size of the machine and relatively slow operation speed [3,4]. Workspace of a machine tool is defined as the volume where the tip of the tool can move and cut material. The design of a planar Stewart platform was mentioned in [5] as an affordable way of retrofitting non-CNC machines required for plastic moulds machining. The design of the PKM [5] allowed adjustable geometry that could have been optimally reconfigured for any prescribed path. Typically, changing the length of one or more links in a controlled sequence does the adjustment of PKM geometry.
通常情况下，术语“高速钻床”就是指具有较高切削速率的钻床。高速钻床(HSDM)也是指具有非常快的和正确的点到点运动的钻床。新的HSDM是由带有两个直线电动机的平面并联机构组成。本文主要就是对并联机器(PKM)的动力学分析。运动合成是为了介绍一种新方法，它能够完善钻孔操作和点到点定位的准确性。动态合成旨在减少因使用弹簧机械时PKM的输入功率。
关键词: 并联运动机床; 高速钻床; 动力学的合成
1.介绍
在最近的几年里，研究所和工业协会介绍了各式各样的PKM。其中大部分（但不是所有）,以众所周知的斯图尔特月台[1]为基础结构。这一做法的好处是高公称的负载重量比，良好的位置精度和结构刚性[2]。斯图尔特式PKM的主要缺点是相对小的工作空间和相对慢的操作速度 [3,4]。机床刀具的工作空间是指刀尖能够移动和切削材料所需要的容积。平面的斯图尔特月台的设计在[5]中被提到，像是对无CNC机器作翻新改进的方法需要塑料的铸模机制一样。PKM[5]的设计允许可以调整几何学已经被规定了的最佳的再配置的任何路径。 一般的，改变一根或较多连杆的长度是以PKM受约束的顺序来做几何学的调整。
Abstract
Typically, the term‘‘high speed drilling’’ is related to spindle capability of high cutting speeds. The suggested high speed drilling machine (HSDM) extends this term to include very fast and accurate point-to-point motions. The new HSDM is composed of a planar parallel mechanism with two linear motors as the inputs. The paper is focused on the kinematic and dynamic synthesis of this parallel kinematic machine (PKM). The kinematic synthesis introduces a new methodology of input motion planning for ideal drilling operation and accurate point-to-point positioning. The dynamic synthesis aims at reducing the input power of the PKM using a spring element.
Keywords: Parallel kinematic machine; High speed drilling; Kinematic and dynamic synthesis
1. Introduction
During the recent years, a large variety of PKMs were introduced by research institutes and by industries. Most, but not all, of these machines were based on the well-known Stewart platform [1] configuration. The advantages of these parallel structures are high nominal load to weight ratio, good positional accuracy and a rigid structure [2]. The main disadvantages of Stewart type PKMs are the small workspace relative to the overall size of the machine and relatively slow operation speed [3,4]. Workspace of a machine tool is defined as the volume where the tip of the tool can move and cut material. The design of a planar Stewart platform was mentioned in [5] as an affordable way of retrofitting non-CNC machines required for plastic moulds machining. The design of the PKM [5] allowed adjustable geometry that could have been optimally reconfigured for any prescribed path. Typically, changing the length of one or more links in a controlled sequence does the adjustment of PKM geometry.
