This machine fits for dispersing moulding sand on wet type moulding mechanical sand treatment production line or crushing used sand after falling . this machine can equalize moisture of used sand after water spraying , cooling effect can be increased if it is matched with used sand cooling equipment 该机用于湿型造型机械化砂处理流水线上对型砂进行松散，或对落砂后的旧砂进行破碎该机可使喷水后的旧砂水分均匀化，与旧砂冷却设备配套使用时可增加冷却效果。
This paper analyzes the factors affecting the controlling precision of sand compactibility system and sets up the dynamic model of regression coefficient between sand compactibility and water content . to prevent the insufficiency or excess of sand water content , the amount of the first addition is set as 80 % of the total water addition amount . after the first water addition , we adopt ar model to predict the stable value of sand compactibility to shorten the time mixing the sand . each time we add water , the correction coefficient is introduced to adapt to the change in the composition of sand . the experiment shows that the mathematics model not only makes the water content in sand reach the best range within shorter time , but also directs how the sand composition should be adjusted , which can better conform to the actual situation 分析了影响型砂紧实率控制精度的因素，建立了型砂紧实率-水分回归系数的动态模型.为防止型砂水分不足或过量，将第一次加水量设定为总加水量的80 .第一次加水后，对型砂紧实率稳定值采用ar模型进行预测，以缩短型砂混制时间.每次加水后，引入修正系数，以适应型砂组成的变化.实验表明，该数学模型不仅使型砂水分含量在较短时间内达到最佳范围，同时可指示对型砂组成进行调整，能较好地符合实际情况
One new rotor sand mixing machine is trial - produced successfully by qingdao tianheng machinery co . , ltd , which adopts rotor configuration initiated internationally . it can break up clay in sand mixing effectively , which conquers lots of disadvantages of rotor sand mixing machine such as much clay groups ; moreover , it makes advantages of rotor sand mixing machine become more obvious 一种新型转子混砂机在青岛天恒机械有限公司试制成功，该机采用国际首创的转子机构，可对型砂混制中形成的粘土团进行有效破碎，克服了转子混砂机混制的型砂粘土团多的缺陷，使转子混砂机的优点更加突出。
Ajl those drictions supp1ied by thes system help us resolve the problern of managing aluxninuin type materials drawings . at the sazne hme , it makes the exploitation and design ofproduc has better inherit by utilising the functions of coding based on the software . as thes systern app1ied the classiforg and coding prinop1e based on gt and cad tedm1ogy in design and managernen of drawings which not only enhance the design quality of product , shorten the development pedod but also decrease the ropeaed drawing work and hanme the method of protract drwings 该系统规范了型材图纸的设计，提高了型材图纸的检索效率，对型材的相关信息进行了的效的管理，良好地解决了铝型材图纸检索和管理的问题；同时，作为一个计算机辅助产品设计系统，利用该系统的分类检索功能和图纸支撑软件的图形编码功能，使产品的开发设计具有良好的继承性。
Passing analysing the link of the three - arc - sect isometric type surface , built the three - arc - sect isometric type surface equation , found the location of isometric type surface with the finite element analysis method and calculated the link intensity of the three - arc - sect isometric type surface 摘要文中对型面联接中的三弧段等距型面联接进行力学分析，首先建立三弧段等距型面方程，应用有限元法确定等距型面接触点的位置，对三弧段等距型面联接中的应力分布及大小进行分析计算。
In this thesis , the sls molding properties of some metal - base composite powders composed of metal powder mixed by several regularly used polymers " powder were studied , on the basis of which , a new sls composite material made by 316 stainless steel powder mixed by epoxy powder was developed and produced . the molding technics and adherent mechanism of the material in sls process was analyzed and studied , and the high temperature sintering technics of the green parts of the material was discussed as well 本文主要针对快速成型的sls方法，研究比较了几种常用的聚合物粉末添加到金属粉末中所构成的金属基复合粉末的成型性，并且研制开发了316不锈钢粉末与环氧树脂粉末共混复合粉末作为成型材料，对其sls过程的成型工艺、聚合物粘接机理以及型坯的高温烧结工艺进行了研究论述，并进一步对型坯的高温烧结过程、烧结中的收缩变形和烧结后的强度作了分析研究。
In this paper , cuw / crcu integrated contacts with 50 % , 60 % , 70 % and 80 % tungsten by weight were prepared by verticat integrated sintering and infiltration technique , and the arc eroding and invalidation mechanism of contacts were analyzed in detail , the results were shown as following : the mechanism of arc eroding for cuw / crcu integrated contact is different with the content of w . 1 采用立式烧结熔渗工艺分别制备了cuw60 crcu ， cuw70 crcu ， cuw80 crcu整体触头材料，并分析了他们的烧损机理；同时，还对型式试验中触头的失效机理进行了分析，并提出改进措施。结果如下：不同成分的cuw电触头的烧损机理是不同的。
The method takes advantage of bezier curve to work out a set of blade profiles of centrifugal pump , using thickening law to thicken the profiles . then the pressure and suction lines of the blade can be obtained . it takes advantage of bezier surface to create pressure and suction surface and makes use of mdt software to create the three - dimensional blade entity 首先采用速度系数法计算得到离心泵叶轮的基本参数，再由b zier曲线生成一组叶轮叶片型线，按照加厚原理对型线进行加厚，得到正背叶片线，再采用张量积b zier曲面生成叶片正背面，由mdt进行三维实体造型得到叶片，从而得到流场计算区域的模型。
By utilizing the above methods and the results of the finite element program named msc / nastran , the paper carries through specific calculations corresponding to the single stress singularity and the double stress singularity issues , which consist of the cracks for mode i , mode ii , the mixed mode crack of mode i and ii and many v - notched problems 利用上述数值方法和有限元程序msc nastran的数值分析结果，对型、型、与复合型平面裂纹以及多种型切口问题进行了具体计算。计算结果表明，本文所提出的数值方法具有简单、通用和精度高的特点，便于实际工程应用。
Theoretical research on the type and mainframe tripled frequency converter : on the basis of building finite element models , dividing grid , application of load in the software of ansys , the dynamic and static performances are calculated , the value of the deformation , the first natural frequency and corresponding mode of the frequency converter are obtained , finally , the dynamic performances of the frequency converter are analyzed 对型三倍频组件和主机三倍频组件的理论研究:采用通用ansys软件对组件进行合理建模,划分网格,施加载荷,在此基础上对它们进行了静态分析和动态分析,得到最大变形量、低阶固有频率和相应的振型,并对组件的动态性能进行了分析。
