切屑折断界限,chip breaking limit
1)chip breaking limit切屑折断界限
1.The formula of critical feed rate when aluminum alloy is cut by PCD tool with a chip breaker has been derived from the theory of up -curlchip breaking limits.从上向弯曲切屑折断界限理论出发,通过槽型参数的变化,推导出了PCD刀具采用断屑器切削铝合金时切屑折断极限进给量的理论预报公式,经过对理论公式的简化变换,给出了实用预报公式。
2)chip breaking切屑折断
1.Predicting the up-curlchip breaking of three-dimensional groove inserts;三维槽型断屑上向卷曲切屑折断预报
2.The database of judging chip break is founded, which is based on the characteristic ofchip breaking curve.通过切削试验,获得了刀具主偏角、切削速度和工作材料牌号对切屑的极限进给量和极限背吃刀量的影响规律及其经验公式,并根据切屑折断曲线建立了判断切屑是否折断知识库和切屑折断预报系统。
3.And it is essential to studychip breaking limits of 3D non-uniform groove cutting tools in order that we can make a precise prediction of chip-breaking with different insert groove.为了对切屑的折断进行准确的预报,提高自动化进程水平,本文对三维复杂槽型车刀片的切屑折断界限进行了研究。
英文短句/例句
1.Predicting the up-curl chip breaking of three-dimensional groove inserts三维槽型断屑上向卷曲切屑折断预报
2.Design of New Arc Angle Rotary Chip Breaker and Establishment of Practical Predicting Formula of Chip Fracture新型圆弧角回转断屑器设计与切屑折断实用预报公式的建立
3.Study on Measuring Methods and Chip Breaking Mechanism of 3D Non-Uniform Groove Cutting Tools;三维复杂槽型车刀片测量方法及切屑折断机理的研究
4.An Easier Breaking Chip Shape and Its Application in Chip Breaking一种易于折断的切屑卷曲形式及其在断屑中的应用
5.On analyzing and researching the theory of breaking chip, the mathematics models of chip’s forming、curling and breaking are set up;分析和研究断屑原理,建立切屑形成、卷曲和折断的数学解算模型;
6.Study about real-time simulation of chip generating, curling and breaking切屑生成、卷曲、折断过程的实时仿真研究
7.CHIP?BREAKING BY FORCING CHIP DEFORMATION?TO REALIZE AUTOMATIC MACHINING强化切屑变形实现自动化切削加工的断屑研究
8.Effect of Cutting Parameters on Chip Fracture Strain切削参数变化对切屑断裂应变的影响
9.Dynamic Instability of Chips and Dynamic Mechanism of Chip Breaking切屑的动态不稳定性与动力学断屑机理
10.A Method of Vibration Chip Breaking & Its Application in Automatic Manufacturing振动断屑在切削加工自动化中的应用
11.Research and Application of a New Job Operation for Forced Chip-breaking in Metal Cutting切削加工强制断屑方法的研究与应用
12.Study on the Chip-breaking Mechanism of Turning Inserts with 3-D Complex Groove at High Speed Cutting;高速切削三维复杂槽型车刀片断屑性能的研究
13.Study on the Chip-breaking Mechanism and Prediction of High Speed Cutting高速切削断屑机理及其预报系统的研究
14.The Curative Effect Observation of Vital Pulpotomy in the Treatment of Young Permanent Incisors with Exposed Pulps in Fractured Crown活髓切断术治疗年轻恒切牙冠折露髓疗效观察
15.Research on Chip-Breaking Capability and Machining Chip-Breaking Predictive System with 3-D Complicated Grooved Inserts in Turning;三维复杂断屑槽断屑性能及断屑预报系统研究
16.Do the following maintenance before leaving: clearing the iron filings and dust, lubricating, and shutting power off.然后做好保养工作,刷清铁屑灰尘,润滑加油,切断电源。
17.the theoretic analysis of the vibrating drilling theory, cutting tool characteristics as well as chip break characteristic is processed, key problems in appropriative cutting tools are discussed;对振动切削的原理、刀具特点及断屑特性进行了系统的理论分析。
18.FEM Analysis on the Simulation of the Metal Cutting Process and Its Application in the Research of Chip Breakers;金属切削过程仿真及其在断屑槽性能研究中的应用
相关短句/例句
chip breaking切屑折断
1.Predicting the up-curlchip breaking of three-dimensional groove inserts;三维槽型断屑上向卷曲切屑折断预报
2.The database of judging chip break is founded, which is based on the characteristic ofchip breaking curve.通过切削试验,获得了刀具主偏角、切削速度和工作材料牌号对切屑的极限进给量和极限背吃刀量的影响规律及其经验公式,并根据切屑折断曲线建立了判断切屑是否折断知识库和切屑折断预报系统。
3.And it is essential to studychip breaking limits of 3D non-uniform groove cutting tools in order that we can make a precise prediction of chip-breaking with different insert groove.为了对切屑的折断进行准确的预报,提高自动化进程水平,本文对三维复杂槽型车刀片的切屑折断界限进行了研究。
3)chip-breaking切屑折断
1.The general design,the knowledge presentation mode and implementation of the knowledge base of thechip-breaking process and insert groove CAD expert system are introduced,by which thechip-breaking-judging,chip-breaking-range and insert-groove-selecting according to the demand of users can be realized,and which provides reference for further study ofchip-breaking proces针对机械加工中切屑处理问题,研究了切屑折断过程及槽型CAD专家系统的总体设计、知识表示模式及知识库的设计与实现方法。
4)chip fracture切屑断裂
1.Orthogonal cutting finite element model is established through studying the material constitutive relation,contact of tool with chip,chip separation,chip fracture,heat dissipation an.通过研究材料动态本构关系、刀屑接触、切屑分离、切屑断裂和切削热动态耗散与传导关键技术建立了正交切削有限元模型,提出材料本构关系建立方法和切屑断裂能量解释观点,最后结合实例进行高速切削模拟,并对模拟结果进行分析和验证,指出所建立的有限元模型是合理的。
5)Discontinuous chip断续切屑
6)margin of commutation切换界限
延伸阅读
切屑的卷曲形式与断屑方法在金属切削加工中,不利的屑形将严重影响操作安全、加工质量、刀具寿命、机床精度和生产率。因此有必要对切屑的卷曲形式和断屑方法进行深入研究,以便对切屑形态进行有效控制。 1.切屑卷曲形式在塑性金属切削加工过程中,由于切屑向上卷曲和横向卷曲的程度不同,所产生的切屑形态也各不相同。为了便于分析切屑卷曲的形式,可将切屑分为向上卷曲型、复合卷曲型和横向卷曲型三大类。在脆性金属切削加工中,容易产生粒状切屑和针状切屑,只有在高速切削、刀具前角较大、切削厚度较小时,此类切屑的卷曲方向才与一般情况下略有差异。 在切削塑性金属时,如刀具刃倾角为0°,有卷屑槽且切削宽度较大,切屑大多向上卷曲。在其它情况下,切屑大都为横向卷曲。例如,在外圆车削加工中,当进给量与背吃刀量之比较大,且刀具的前角为0°时,切屑容易横向卷曲成垫圈状(见图1)。这是因为切屑两端部分在横向上变宽,而切屑的体积不变,横向变宽部分的厚度必然变薄,若长度不缩短,就必然产生横向卷曲;另外,若在车刀上磨有过渡刃,加上刀尖和副切削刃的作用,使得在切屑宽度方向上剪切角发生变化,也可使切屑产生横向弯曲而呈垫圈状。 在通常情况下,切屑不可能仅仅向上卷曲或横向卷曲,而是在向上卷曲的同时也产生横向卷曲。长紧卷屑和螺状卷屑的形成就是切屑同时向上和横向卷曲的结果(如图2)。 2.断屑方法 在塑性金属切削中,直带状切屑和缠绕形切屑是不受欢迎的;而在脆性金属切削中,又希望得到连续型切屑。通常,改变切削用量或刀具几何参数都能控制屑形。在切削用量已定的条件下加工塑性金属时,大都采用设置断屑台和卷屑槽来控制屑形。本文主要讨论卷屑槽基本参数的计算。 图3是直线型、直线圆弧型和圆弧型三种卷屑槽的基本形式。其主要参数如下: (1)接触长度L 图3中,切屑在前刀面上的接触长度可由下式获得 L=Kmachsin(φ+β-γo)/sinφcosβ(1)式中Km——切屑与前刀面接触长度修正系数,一般取1.6左右ach——切屑厚度(2)卷屑槽半径R2由断裂理论可知,塑性金属的断屑条件是εf≥εfc(2)式中εf——切屑卷曲应变εfc——临界断裂应变对于向上卷曲型切屑,其折断条件如图4所示。假设在切屑外表面拉长ΔL后达到断裂极限,由几何关系得ΔL=(R1+y)dθ-R1dθ(3)