Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece
將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒
銑刀
銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片
銑刀
銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片
銑刀直徑選擇、
銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的
一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義
( 3 ) a category - based dynamic graph. ( cdg ) structure, which supports the novel tactic of relation - oriented collision detection, is presented to improve the efficiency of collision detection and realize the attached motion in vr scene. ( 4 ) a dynamic 8 - tree structure and a relative self - similar recursion algorithm are presented to model a dynamic workpiece object, which is machinable
（ 3 ）提出並實現了基於分類的動態圖結構（ cdg ） ，該結構支持面向關系的碰撞檢測，很好的解決了虛擬cnc
銑床環境下碰撞檢測的唯
一性和完全性問題，在很大程度上提高了碰撞檢測的實時性，並實現了虛擬環境下的關聯運動。
The plain milling machine consists of a boxlike column, which houses the motor and the gears or belt mechanism for driving the spindle and table.
普通
銑床有
一個箱式立柱（床身），立柱裝有電動機和齒輪或皮帶輪裝置，以驅動主軸和工作臺。
The enterprise pokolm fr ? stechnik gmbh & co. kg offers possibilities within the range milling spindles and solid carbide tools as well as milling tools
Kg作為
一家專業的供貨商為您提供高質量的
銑床主軸，
銑削刀具，整體硬質合金工具。
The structure character of chain nest is analyzed. a set of easy structure and easy usage milling tool are designed and made. the processing precision is ensured and design standard is reached
分析了鏈輪鏈窩的結構特點，設計、製造了
一套結構簡單、使用方便的
銑削工裝，保證了加工精度，達到了設計要求。
They had never been worn, my mother said. under that, the miscellany began - a quadrant, a tin canikin, several sticks of tobacco, two brace of very handsome pistols, a piece of bar silver, an old spanish watch and some other trinkets of little value and mostly of foreign make, a pair of compasses mounted with brass, and five or six curious west indian shells
在那套衣服的下面，開始出現了各式各樣的東西：
一個四分儀，
一個錫制的小酒杯，幾顆煙，兩對非常漂亮的手
銑，
一根銀條，
一隻西班牙老懷表，還有其他
一些不值錢的小裝飾品，大多是外國製造的，
一副黃銅桿的圓規，還有五六個珍奇的西印度貝殼。
Aspheric optical compound machine tool ( aocmt ) which integrates grinding, lapping and polishing is developed. the influences of motion errors on grinding accuracy are analyzed. according to homogeneous coordinate transition model, the postposition processing algorithm in multi - axis numerical control machining is deduced
3 、研製了集
銑磨成型、研磨、拋光於
一體的光學非球面復合加工機床（ aocmt ） ，分析了各種運動誤差對
銑磨精度的影響；根據空間齊次坐標的變換模型，推導出多軸數控加工的後置處理演算法；通過五軸數控聯動， aocmt機床能夠以法向方式加工出任意復雜的光學表面，
銑磨精度穩定在8 m之內。
Meixing electronics factory is major in the vacuum tube stereo power amplifier, which is located in the nanhai city ， owned a workhouse over 1300 square meter, with five plant, they are box, seal and transformer circling 、 debugging & check, we also have the machine process, such as milling machine 、 punch 、 drill press 、 electric welding 、 matrix 、 incision machine, and radio tube test machine. we have realize the product line manufacture, the monthly whole output is over 200 sets
美星電子是
一個專業製造真空管身歷聲功率放大器的加工廠，位於廣東南海市黃岐工業區，擁有廠房
一千三百平方米，工廠分機箱加工、焊接組裝、變壓器繞制、煲機老化、調試檢測五個車間，機械加工設備擁有
銑床、沖床、創床、鉆床、電焊、模具製作、切割等二十多臺，電子管及整機檢測調試儀器十餘臺，該廠實現了配套設備、流水作業，每月可生產膽機二百臺以上，可謂中國專業生產膽機最大規模的工廠。
The blade is manufactured to be the shape of tooth by press and milling cutter directly. then, the blade is separated to be right and left sides by saw set tool. this type is the commonest, cheapest, most toilsome and time - wasting product
直接由沖床press
銑刀milling cutter製造成鋸形狀，再以分角器saw set tool將鋸左右兩邊，這就是
一般市場上最常見最廉價使用上也最費力又最耗時的產品。
What exam of grade of numerical control machine wants to see you learn is which kind of machine, numerical control machine includes numerical control car specificly, mill, auger, grind, machining center is waited a moment, you need study machine of the system to add knowledge, be familiar with a machine tool, return practice of the machine on need, the most important is the person guidance that need knows, self - study is very difficult, the knowledge on book needs to combine practice a little, the proposal has gone ability school learns a few the basiccest knowledge ( 2 to 3 years ), there can be relevant grade letter after ability school graduates next ( from primary labour, intermediate class, senior worker worker, technician, senior technician, hind two kinds obtain the hardest, want knowledge not only even relevant experience, its wage scale is equal at the engineer, chief engineer one kind ) remain be about to rely on oneself to get
數控機等級考試要看你學的是哪
一類機器，數控機器具體的包括數控車，
銑，鉆，磨，加工中心等等，你需要系統的學習機加知識，熟悉機床，還需要上機實踐，最重要的是需要懂的人指導，自學很難，書本上的知識有些是需要結合實踐的，建議去好
一點技校學習
一些最基本的知識（ 2到3年） ，然後技校畢業后會有相關的等級證書（從初級工，中級工，高級工，技師，高級技師，后兩種最難取得，不僅要知識還要相關經驗，其待遇級別等同於工程師，總工程師
一類）剩下的就要靠自己鉆了。
In the special fields machine tools for various materials, wall saws, road, rail and canal construction or beyond that with diamond tools with polished diamonds glass cutting diamonds, diamond drills, crack cutter, stones, boards, pipes, pre - assembled units as well as with drill machine, building construction and / or with circular saw blades and industrial and refuse technology is cedima gmbh well - known
Cedima gmbh是
一家現代化的、可靠的產品供應商，這家供應商從事鉆床、打孔機，金剛石工具，切割器，圓鋸片、鋸片
銑刀，臺鋸，鋸片、鋸條，石材加工，墻面鋸，張緊機械（張緊分離） ，用於各種原料的機械工具，地上建築，街道、軌道和渠道建築，石、板材、管道、成品，工業和垃圾處理技術，通用空氣技術的製造、銷售。
The heng zhong group found in 80 ' s, owns several years produce manufacturing experience of many years, is a profession group that produce the ganting boring and milling machine, and heavy type lather of business enterprise, gather a tool machine development, produce, sell, service at the whole body, own strong technique strength, high accuracy of large process an equipments, strict of examination means, the quality of science management system, modern of design principle, provide more high - quality productions for you
恆重集團創立於八十年代，擁有多年生產製造經驗，是
一家專業生產重型龍門龍門鏜、
銑、磨、刨以及重型車床的企業，集機床開發、生產、銷售、服務於
一身，擁有雄厚的技術力量，高精度的大型加工設備，嚴格的檢測手段，科學的質量管理體系，現代化的設計理念，為您提供更優質的產品。
Our factory introduces the advanced production equipment, import such a series of equipment as large - scale numerical control machining center, line cutting, grinding machine, numerical control milling machine, spark - erosion machine tool, etc
本廠引進先進的生產設備，擁有進口大型數控加工中心線切割磨床數控
銑床電火花機床等
一系列設備。
Senyun corporation is specialized in the designing and manufacturing of precision molds and the injection molding of plastic products. we produce the parts and molds for customers and also for our own usage. such as ejector pins, core, cavities, and mold plates. today, we effectuate a mold and injection molding with efficient method in our company
聲遠實業股份有限公司在模具零配件的領域內
一直處于領導地位，聲遠專精於精密塑膠模具設計與製造，我們能夠于自己工廠內製造模具所需的所有零配件，例如：頂針，灌嘴，公母模仁，與模板之車，
銑加工及研磨，放電，線切割加工等等，全部于本廠采
一貫化流程分工製造
Jingyijia was established in 1998, who is professional in manufaturing plastic mould, die - casting products. the workshop is more than 2000 cm2. the moulds was started to be exported to south asia and europe in 2001 using cnc milling machine, electrospark, wire - electrode cutting, etc. technique is unending while no the best in moulds. only by untiring working, reserching and improving, can we design good moulds. we welcome every old and new friend both at home and abroad to visit us and building business relationship
廈門精藝佳公司成立於98年，百分百開發生產塑膠產品，壓鑄產品，製造各類塑膠壓鑄模具.模具廠使用面積兩千多平方米，多臺大型cnc
銑床及電火花，線切割能加工製造， 3 . 5米以下各類模具. 2001年開始模具出口東南亞及歐洲.技術永無止境，模具永遠沒有第
一，只有不懈努力，研發，改進才能設計好模具.我們真誠期望國內外朋友，同行蒞廈交流指導，為繁榮經濟推動民族工業科學進步和偉大復興作應有貢獻
Two - way feeds, each finish carton mill trough mill trough make paper dropped on a board by dust
雙向進刀，
一次完成紙板盒
銑槽工序。
The main works are shown as followings : in order to get best economic benefits and quickest time response, the advantages and shortages of existing methods for machining twin - screws are analyzed. in view of the production of co - rotating twin - screw is various and mostly in small batch, a new approach for forming cylinder helical surface with milling cutter is put forward. it presents the theoretical foundation for machining of twin - screw
論文主要工作有如下幾點：針對同向雙螺桿產品零件的多品種、小批量的生產特點，為了取得最佳經濟效益和快速地時間響應，在查閱了雙螺桿加工有關的國內外文獻資料，研究分析了雙螺桿各種現有的加工方法的優缺點，提出了
一種新的加工方法? ?用圓柱立
銑刀成形加工雙螺桿螺旋面。
Practice and study on a new step milling method
一種新型階梯銑削方法的研究與實踐
