查询词典 precision accuracy

This paper describes the working theory, construction design, technology rules and inspection accuracy of the precision stepper ball screw nut.

本文主要阐述精密步进滚珠丝杠副的工作原理、结构设计、制造工艺及精度检验。

Steelyard scales can be divided into wood, which scale (the largest weighing 20 kg less accuracy 130-120) Taiwan scales (up to the public and B weighing 10-500 kg, precision, 130-130), weighbridges, quadrant word steelyard with a pan, in addition to the amount of bulk cargo that B is widely used in large enterprises and transport sector, railway scale.

秤可分为木杆秤、案秤（最大秤量20公斤以下，精度为130—120）、台秤（最大称量10—500公B斤，精度130—130）、地秤、象限字盘秤，此外还有称B量大宗货物，广泛用于大企业和交通运输部门的轨道衡。

At present, the company from development to production tooling, from milling, grinding, cars, wire-cut EDM and injection molding to spraying, etc., are imported special precision equipment to ensure that the process accuracy and product quality; we have to master Pro / E, CATIA, UG , MASTER CAM, as well as other modern CIMATRON advanced CAD / CAM software engineers engaged in various complicated plastic mold design and development.

目前，公司从模具研制到产品生产，从铣、磨、车、线切割到EDM以及注塑喷涂等，均采用进口专用精密设备，确保工艺精度和产品质量；我们拥有掌握Pro/E、CATIA、UG、MASTER CAM以及CIMATRON等现代先进CAD/CAM软件的工程师从事各类复杂的塑胶模具的设计和开发。

The system has high accuracy, stable operation and reliable performance, with temperature compensation and other benefits can be widely used in a wide operating temperature range of high-precision tilt angle measurement.

该系统具有精度高、运行稳定、性能可靠、带温度补偿等优点，可广泛应用于宽工作温度范围的高精度倾斜角测量。

According to the hole processing in the high accuracy in the repair and machining of coal mine,Have the adjustment of curtting tool generally,disaster and efficiency are lowed and processed the problem that precision is hard to guarantee,Have designed,a kind of trimming bore hole arbor.

该装置利用结构简单的差动螺旋机构，通过斜块实现刀具快速、准确的微调整，达到调整方便、高精、高效。

Wire electrode based on the trajectory of the different forms of control, WEDM can be divided into three types: one is shaped by the imitation controlled cutting in line in advance and work to create the same shape by mold, when processing the workpiece at the same time rough and on the mold clamping in the machine tool table, in the process of cutting wire electrode tightly against the mold on the edge of the track for the mobile, thus cutting out and die on the same shape and precision to the workpiece; another One is the electro-optical tracking control, to carry out the cutting line, before the basis of certain parts to enlarge the proportion of drawings depicts an electro-optical tracking map-processing machines will be placed in design stage of electro-optical tracking, tracking platform Photoelectric first line of graphics has always been to follow the track of the Mexican campaign, and then through the use of electrical, mechanical linkage to control the machine tool table, together with the workpiece so相似形wire electrode relative movement, thus cutting out the same shape and design to the workpiece; again a digital control, the use of advanced automatic control of digital technology-driven machine tool in accordance with the pre-processing parameters according to the workpiece geometry pre-processing procedures for the preparation of a good CNC auto-complete processing, the production does not require appearance on board the need to map to enlarge map of the previous two form of control has a higher machining accuracy and a broad range of applications, both at home and abroad more than 95% have adopted WEDM NC.

根据对电极丝运动轨迹的控制形式不同，电火花线切割机床又可分为三种：一种是靠模仿形控制，其在进行线切割加工前，预先制造出与工件形状相同的靠模，加工时把工件毛坯和靠模同时装夹在机床工作台上，在切割过程中电极丝紧紧地贴着靠模边缘作轨迹移动，从而切割出与靠模形状和精度相同的工件来；另一种是光电跟踪控制，其在进行线切割加工前，先根据零件图样按一定放大比例描绘出一张光电跟踪图，加工时将图样置于机床的光电跟踪台上，跟踪台上的光电头始终追随墨线图形的轨迹运动，再借助于电气、机械的联动，控制机床工作台连同工件相对电极丝做相似形的运动，从而切割出与图样形状相同的工件来；再一种是数字程序控制，采用先进的数字化自动控制技术，驱动机床按照加工前根据工件几何形状参数预先编制好的数控加工程序自动完成加工，不需要制作靠模样板也无需绘制放大图，比前面两种控制形式具有更高的加工精度和广阔的应用范围，目前国内外95%以上的电火花线切割机床都已采用数控化。切割属电加工范畴，是由前苏联人发明的，我国是第一个用于工业生产的国家，当时由复但大学和苏州长风机械厂合作生产的这是最早的机型叫复旦型，我们国内在此基础上发展了快走丝系统。欧美和日本发展了慢走系统LS

We study a third-order trajectory planning algorithm for ultra-precision point-to-point motion and its accuracy compensation method.

研究了一种优化的超精密点对点运动3阶轨迹规划算法及其精度补偿方法。

1 Rectangular spline Processing of convenience, can be used to obtain high precision grinding method, but usually use within the spline spline broach, spline hole for the unreasonable can not be processed, had to use slotting processing, low accuracy.

1.1 矩形花键加工方便，可用磨削方法获得较高的精度，但内花键通常要用花键拉刀，对于不通孔的花键就无法加工，只好用插削加工，精度较低。

The round trip is driven by servomotor, matched up with precision ball screw and wire slide rail, to smooth the round trip of the blade and position accuracy.

切刀与主轴采用无级变速AC马达。5。行程以伺服马达驱动，配合精密滚珠螺杆及线滑轨，切刀行程顺畅，定位精确。

There are some questions such as forest fire model selection, forest fire model updating, verifying simulation accuracy and so on in traditional forest fire spreading system. Study purpose is to build an innovative forest fire spreading simulation system based on DDDAS in this paper. The system can increase precision of forest fire spreading simulation by model base, model selection, model updating and so on. It can provide a strategic decision for forest fire save and new technologies demonstration for other related field of research. The research encompasses several major topics:(1) This paper brings up the term of dynamic data driven forest fire spreading simulation system and supplies new research approach and thought for forest fire spreading simulation study. The system framework was brought.

本研究针对传统林火模拟过程中存在的模型手动选择难度大、模型修正数据获取效率低、模拟精度验证困难等问题，以DDDAS为林火蔓延模拟研究的技术范式，提出林火蔓延模拟全新的技术框架体系，解决模拟系统建设过程中的模型库建设与管理、模型适宜性选择、模型自适应修正、模拟过程实时验证等关键技术，建立林火扩散模拟和实际林火发展之间相互协作、共生的林火扩散动态模拟系统；提高林火蔓延模拟精度，将林火蔓延模拟真正应用到林火扑救指挥过程当中，在实践上为林火扑救指挥提供决策支持，在理论上为相关领域的空间扩散模拟研究提供新的思路和技术范式。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。