机械专业类英语文章阅读
机械市场是机械、机电设备流通的重要载体,是专业市场的一类,也是现有的主要商业建筑类型之一。下面小编整理了机械专业类英语文章，希望大家喜欢!
机械专业类英语文章摘抄
Types of Control Systems
控制系统的类型
There are two basic types of control system in numerical control:point-to-point andcontouring. In the point-to-point system, also called positioning, each axis of the machine isdriven separately by leadscrews and, depending on the type of operation, at different velocities.
数控有2种基本类型,点对点式和轮廓式控制,点对点式控制也称定位控制,每个轴都是通过丝杠单独驱动,根据加工类型不同,加工速度也不一样。
The machine moves initially at maximum velocity in order to reduce nonproductive time butdecelerates as the tool reaches its numerically defined position.
机器开始以最大速度运行来减少非加工时间,但当他达到数据定义的位置时,机器开始减速。
Thus in an operation such as drilling or punching, the positioning and cutting take placesequentially.
因此在一个操作中,如钻或冲孔操作先定位在加工。
After the hole is drilled or punched, the tool retracts, moves rapidly to another position, andrepeats the operation.
在钻或冲孔之后,迅速收起工具移动到另一个位置重复此操作。
The path followed from one position to another is important in only one aspect: The timerequired should be minimized for efficiency.
从一个位置移到另一个位置是非常重要的,要遵循一个原则,从效率上考虑只要时间最短即可。
Point-to-point systems are used mainly in drilling, punching, and straight milling operations.
点对点系统主要用于钻,冲孔,直铣操作中。
In the contouring system, also known as the continuous path system, positioning and cuttingoperations are both along controlled paths but at different velocities. Because the tool cuts asit travels along a prescribed path, accurate control and synchronization of velocities andmovements are important.
轮廓式也就是连续路径式系统,定位和切削同时按不同速度来控制,由于刀具在指定路线运动同时切削,因此速度和运动的同步控制是非常重要的。
机械专业类英语文章鉴赏
线性差补
Linear interpolation for creating a circular path would be quite inappropriate because the programmer would be required to specify the line segments and their respective end points that are to be used to approximate the circle.
线性差补用来差补圆是不合适的因为程序源需要明确指定线段部分,线段数量和各自的终点来大约模拟圆弧。
Circular interpolation schemes have been developed that permit the programming of a path consisting of a circular arc by specifying the following parameters of the arc: the coordinates of its end points, the coordinates of its center, its radius, and the direction of the cutter along the arc.
使用圆弧只要给定以下参数,圆弧终点坐标,圆心坐标,半径和刀具沿圆弧路径的走刀方向。
The tool path that is created consists of a series of straight-line segments, but the segments are calculated by the interpolation module rather than the programmer.
差补也是由许多小的直线段来实现的,但这些小线段的参数由差补模块来计算出来的,而不是程序员设定的。
The cutter is directed to move along each line segment one by one in order to generate the smooth circular path.
切削是沿着每一小线段一个一个的进行以产生光滑曲线路径。
A limitation of circular interpolation is that the plane in which the circular are exists must be a plane defined by two axes of the NC system.
圆弧差补的局限性是圆弧路径所在平面是由数控系统中两轴所决定的平面。
机械专业类英语文章赏析
螺旋线差补
Helical interpolation combines the circular interpolation scheme for two axes described above with linear movement of a third axis. This permits the definition of a helical path in three-dimensional space.
螺旋线差补结合了环形差补两轴在第三轴上做线性运动这样来定义空间三维螺旋路径。
Parabolic and cubic interpolation routines are used to provide approximations of free-form curves using higher-order equations.
抛物线差补和立方差补法通过高次高程来实现自由曲线。
They generally require considerable computational power and are not as common as linear and circular interpolation.
这通常需要有强的计算能力，正因如此，他不如直线差补和环形差补常见。
Their applications are concentrated in the automobile industry for fabricating dies for car body panels styled with free-form designs that cannot accurately and conveniently be approximated by combining linear and circular interpolations.
他们主要用于汽车工业中具有自由风格的车身面，而这是线性差补和圆弧差补不能精确容易得到的
The most common application of numerical control is for machine tool control. This was the first application of NC and is today the most important commercially.
数控技术运用于数控机床，这是数控的主要应用。现在主要用于商业。
In this section we discuss the machine tool applications of NC with emphasis on metal machining.
我们仍讨论数控系统特别是金属数控车床。