数控技术专业英语(第2版)：Unit 3 NC Programming
合集下载
相关主题
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
Unit Three
Dialogue Text Supplementary Reading Translating Skills (III)
Dialogue
Topical Introduction: Tom and Mary are now paying a visit to an automatic factory. They are listening to the introduction given by a girl guide.
下一页 返回
Dialogue
Tom: Oh, it’s really wonderful. But could I ask a question? Why is it not very bright in the workshop? It seems very dark inside, doesn’t it?
(2) On a tool-rotating machine, such as a milling or boring machine, the Z axis is perpendicular to the tool set, and the positive motion moves the tool away from the workpiece (Fig32 and Fig 3-3).
Guide: Ladies and gentlemen, welcome to our factory. This factory, perhaps you can see, is not an ordinary factory, but a totally automatic factory. So here you can see there are no people working at all. All the parts are made by automatic machines. All materials are moved by automatic materialshanding equipment. All assembly work is also done on an automatic assembly line. Even the equality control is also checked automatically.
Tom: Oh, I see. It sounds fantastic.
上一页
返回
Text
NC programming Coordinate System for NC Machines
In an NC system, each axis of motion is equipped with a separate driving source that replaces the hand wheel of the conventional machine. The driving source can be DC motor, a stepping motor, or a hydraulic actuator. The source selected is determined mainly based on the precision requirements of the machine1.
Guide: Oh, yes. That’s true. Because things inside are done with no people participation in. Most machine don’t need lights for their work. They don’t need comfortable temperatures, either.
上一页 下一页 返回
Text
1. z AXIS
(1) On a workpiece-rotating machine, such as a lathe, the Z axis is parallel to the spindle, and the positive motion moves the tool away from the workpiece. (Fig.3-1)
下Biblioteka Baidu页 返回
Text
The relative movement between tools and workpieces is achieved by the motion of the machine tool slides. The three main axes of motion are referred to as the X, Y, and Z axes. The Z axis is perpendicular to both the X and Y axes in order to create a right-hand coordinate system, as shown in Fig.3-1. A positive motion in the Z direction moves the cutting tool away from the workpiece2. This is detailed as follows:
Mary: Oh, very nice. But how could all the various systems be made to work together?
上一页 下一页 返回
Dialogue
Guide: It is the main computer in the control center and all the other computers in the different shops that unite all the various systems together.
上一页 下一页 返回
Fig.3-1
Dialogue Text Supplementary Reading Translating Skills (III)
Dialogue
Topical Introduction: Tom and Mary are now paying a visit to an automatic factory. They are listening to the introduction given by a girl guide.
下一页 返回
Dialogue
Tom: Oh, it’s really wonderful. But could I ask a question? Why is it not very bright in the workshop? It seems very dark inside, doesn’t it?
(2) On a tool-rotating machine, such as a milling or boring machine, the Z axis is perpendicular to the tool set, and the positive motion moves the tool away from the workpiece (Fig32 and Fig 3-3).
Guide: Ladies and gentlemen, welcome to our factory. This factory, perhaps you can see, is not an ordinary factory, but a totally automatic factory. So here you can see there are no people working at all. All the parts are made by automatic machines. All materials are moved by automatic materialshanding equipment. All assembly work is also done on an automatic assembly line. Even the equality control is also checked automatically.
Tom: Oh, I see. It sounds fantastic.
上一页
返回
Text
NC programming Coordinate System for NC Machines
In an NC system, each axis of motion is equipped with a separate driving source that replaces the hand wheel of the conventional machine. The driving source can be DC motor, a stepping motor, or a hydraulic actuator. The source selected is determined mainly based on the precision requirements of the machine1.
Guide: Oh, yes. That’s true. Because things inside are done with no people participation in. Most machine don’t need lights for their work. They don’t need comfortable temperatures, either.
上一页 下一页 返回
Text
1. z AXIS
(1) On a workpiece-rotating machine, such as a lathe, the Z axis is parallel to the spindle, and the positive motion moves the tool away from the workpiece. (Fig.3-1)
下Biblioteka Baidu页 返回
Text
The relative movement between tools and workpieces is achieved by the motion of the machine tool slides. The three main axes of motion are referred to as the X, Y, and Z axes. The Z axis is perpendicular to both the X and Y axes in order to create a right-hand coordinate system, as shown in Fig.3-1. A positive motion in the Z direction moves the cutting tool away from the workpiece2. This is detailed as follows:
Mary: Oh, very nice. But how could all the various systems be made to work together?
上一页 下一页 返回
Dialogue
Guide: It is the main computer in the control center and all the other computers in the different shops that unite all the various systems together.
上一页 下一页 返回
Fig.3-1