切割

Function that the cutting blowpipe raises automatically following the uneven steel plate when cutting, ensure that the distance between cutting blowpipe and the steel plate are consistent when cutting, thereby guarantee cutting mass.

具有切割时割炬随钢板高低不平而自动调高的功能，保证切割时割炬与钢板的距离一致，从而保证了切割质量。

The specimen laser cutting experiments show that it is feasible to cut thin quartz glass plates pricisely with laser cutting technique with accuracy of better than 20μm and central symmetry of less than 3m.

对石英玻璃薄板的激光精密切割进行了实验验证，实验结果表明，激光精密切割技术能够较好地运用于石英玻璃薄板的精密切割加工中，其加工精度优于20μm、中心对称度小于3μm。

Faraday's law is that when the flux in the conductor loop changes, it produces electromotive force in the conductor loop, and obeys to contour integral law , Maxwell Curl Theory is that when the magnetic intensity of a certain point in ether space changes, there produces electric field at that point in ether space, which is the field mutual production theory of "electric field produces magnetic field and magnetic field produces electric field" in the free space which everybody is familiar with, and it obeys differential law , Lorentz magnetic force is that when metal electrons cut magnetic lines, metal electrons forced by move along the conductor to form inductive current, in fact, it doesn't matter whether coil moves or magnet moves, only if there exists relative motion between magnetic field and conductor, metal electrons must cut magnetic lines, which is,"coil stills while magnet moves to the left" and "magnet stills while coil moves to the right" these two situations are the same, which both belong to metal electrons having cut magnetic lines.

法拉第定律指导体环路里的磁通量发生变化时，在导体环路上产生电动势，而且服从围线积分律；麦克斯韦旋度理论指以太空间某点的磁场强度发生变化时，在以太空间的该点产生电场，即大家熟知的自由空间里"电场生磁场与磁场生电场"之互生场理论，而且服从微分律；洛伦兹磁力指金属电子切割磁力线时，金属电子受力沿着导体漂移而形成感应电流，其实，无论线圈运动或是磁铁运动，只要磁场与导体存在相对运动，则金属电子必然切割磁力线，即，"线圈静止而磁铁向左运动"与"磁铁静止而线圈向右运动"这两种情况是一样的，都属于金属电子切割了磁力线。

Threads shall be cut only with sharp thread cutting tools with cutting oil applied during operation.

在螺纹切割期间，应使用锐角螺纹切割工具和切割冷却油。

The strong and weak points of the guillotine cutting stock problem based on strip patterns were analyzed.

在分析具有条状结构特点的二维斩断切割布局已有模型优缺点的基础上，提出了具有条块结构特点的斩断切割布局方案以及基于条块结构的斩断切割启发性规则，建立了相应的优化模型和算法。

Methods Ninety patients undergoing upper abdomen operation were randomly equally divided into 3 groups. Hemostatic scalpel was used in group A, endotherm knife in group B and stainless steel scalpel in group C.

选择上腹部手术患者90例，随机均分为3组。A组为热凝切割组，B组为高频电刀切割组，C组为普通手术刀切割组。

In the design of the de-huller, the lotus seeds were fed into the de-hulling channel in queue of the seeds with a certain heading orientation by using a screw expeller, and the de-hulling channel composed of two rotating supporting roller and a con-rotating cutting roller was established to realize the de-hulling of seeds. The integrated adjustment unit was designed for the adjustment of the main cutting parameters such as cutting force, cutting depth, two obliquities in horizontal and vertical plane so that the different variety and granularity of seeds were de-hulled.

辊刀式莲子剥壳机采用供送螺杆对壳莲进行分粒供送并使莲子按照一致的位形排序上料，采用由双托辊和剥壳辊构成的剥壳通道实现莲子剥壳，为适应不同品种、不同粒度壳莲的剥壳，在剥壳机设计中采用了集总式调节机构以实现对主要切割参数即切割压力、切割深度、螺旋辊刀空间斜置和偏置角度的调节。

According to the emphatic analysis of processing,the 4 kinds of laser damage-free cutting methods,including traditional optimized parameter method,laser multiple-pass cutting,laser cutting with controlled fracture by stress guiding method and aided laser cutting method,are summarized.

介绍了硬脆性陶瓷激光切割技术研究的若干新进展，着重从工艺角度系统地分析总结了激光加工陶瓷减少热损伤的4大类型：传统工艺的优化参数法、多道切割法、应力引导控制裂纹切割法以及辅助切割法。

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

The two blades are fixed to constitute 45°(it adopts one special blade for cutting profile of professional picture frame) to cutting 45 degree profile, adopt German 13 hard alloy saw blades, imported guide rail, automatic cooling spray lubrication and hydro-pneumatic damper stepless speed regulation, thus it has high linear velocity and stable cutting angle, good surface finish, high precision and stable feeding.

采用德国成熟的设计理念结合最新的使用要求与习惯、针对用于38、50、65系列铝合金门窗料、镜框料以及新型隔热型材门窗料45度切割而开发，专业45度切采用两锯片固定构成45°（专业镜框料切割锯床采用一把专制刀具），对型材完成45°切割。选用德国13硬质合金锯片、进口导轨，线速度高，因而切割角度更加稳定、精确，自动喷油冷却润滑、气液阻尼无级调速装置，加工表面光洁度好，精度高、进给平稳。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。