加工

Dynamic cutting force is a basic parameter and it directly influences relative displacement between tool and workpiece, tool wear and surface quality in turning operation. Therefore, simulation model of dynamic cutting force is an important part of machining physical simulation research. Cutting force models commonly used are empiristic equations. These equations are often based on statistical analysis of machining data, obtained via changing one or more machining parameters, whilst fixing others. But a complete turning process and nature of force can not be accurately described by means of these models.

动态切削力是切削加工过程中的基本参数，其动态变化直接影响加工过程中刀具与工件的相对位移、刀具磨损和表面加工质量等，因此动态切削力的预测仿真建模是切削过程物理仿真研究的基础，但是目前大多使用经验公式描述动态切削力，这些经验公式多少存在一些不足，难以完全真实地反映在整个切削过程中力的变化历程和变化特点。

Based on theories of envelope and discrete mathematics, the geometric models of flutes being machined are theoretically studied, the approaches of checking machining theories and simulation of machining process are discussed, and wireframe or entitative simulation pictures are given.

基于包络和离散数学理论，论文对加工后的刀槽几何模型进行了理论性研究，讨论了成形理论检验及加工过程的仿真方法，给出了加工过程线框的或实体的仿真图形。

The method of ultrasonic broaching waveguide entocoele mentioned in th e article is the impulse machining method, in the broaching process the broachin g tool is thrown over the vertical ultrasonic vibration to obviously improve wor king accuracy and surface quality of waveguide entocoele.

本文提出的波导内腔超声推挤方法是一种脉冲加工方法，其实质是在推挤工作过程中，给推刀施加纵向超声频振动，以大幅度提高波导内腔加工精度和加工表面质量。

In order to select or adjust viscosity easily, determine other processing parameters in AFM, and forecast the result of AFM, a method is proposed that can quantificationally describe different viscosities of flowable abrasive mixture by means of fuzzy mathematics theory.

为了便于实际加工中选择或调整黏度，合理确定其他加工参数，以及预测加工结果，针对仅有对流体磨料黏度定性说明的现状，提出用模糊数学理论定量描述流体磨料黏度的方法。

The traditional way to manufacture the gashes of gear hob cutter is to mill it one by one, but the efficiency is quite low. With the proposed manufacturing process, the gashes could be generated by another specially designed hob cutter so that the manufacturing efficiency could be improved 2~3 times.

滚齿刀容屑槽之传统加工方式，系利用成型铣刀逐槽加工而成，除加工时程冗长外，铣制ZK 型蜗杆之缺点亦无法避免，本文再次利用滚制方式形成容屑槽，并解决传统制程上述之缺失。

As a cutting means of machining hard gears with high precision shaping technology has been wildly used at present. Compare with traditional methods for machining the gard gearsgrinding gobbing shaving and honing shaping is almost the optimum in the case of special structuressuch as the internal gear dual gear and gear with land corner.

插齿工艺做为加工高精度硬齿面齿轮的一种切齿方法，目前已得到广泛的应用，与传统的磨齿、滚齿、剃齿、珩齿等硬齿面齿轮加工方法相比，在加工内齿轮、双联齿轮及带台肩的齿轮等具有特殊结构的齿轮方面，插齿几乎是最优的选择。

This paper,based on an analysis of the process of grooving the workpiece,sets up a mathematics model for the feed engagement,which varies with t...

通过对切断加工过程的分析，建立了进给量随加工直径变化的数学模型，通过调用宏程序变量的方法，实现了刀具工作后角恒定，从而在数控切断、切槽加工中解决了这一难题。

The company is set heterotypic precision machining processing, casting the ball in the Mexican professional integration of large-scale manufacturing enterprises, products, in addition to the wind when the group supporting the processing, but also sold to Liaocheng, Dezhou, Jinan, Dongying, and other places, and exports to the United States, Germany, France, Italy , Japan, Taiwan and other countries and regions.

公司是集精密加工异型加工、球墨铸造于一体的大型专业生产企业，产品除给时风集团配套加工外，还销往聊城、德州、济南、东营等地，并出口到美国、德国、法国、意大利、日本、台湾等国家和地区。

But, the basic mechanism of PEDM is unclear, dimensional precision is very difficult to get. So that, To analyze the model of discharging, to find the inbeing of PEDM and to promote technology of PEDM practical become Focus of EDM research.

但是，这项工艺的基本机理尚不清楚、尺寸精度很难确定，而且该技术缺少必要的工艺规范，因此，分析放电模型、寻找混粉电火花加工技术的本质以及混粉电火花加工工艺的实用化成为当今混粉电火花加工技术研究的热点。

Because of the especial requirement of gear form of preshaving hob The design of preshaving hob is more comples than common gear hob.The design method is inefficience,takes much time,and requires highly of designers.

拉刀也是机械加工中常用的一种刀具，拉削可加工内表面（如各种型孔、键槽、花键孔等）和外表面（如平面、半圆弧面和组合表面等）拉削加工效率高，精度高。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。