Lesson 2 Tolerances and Fits[共5页]
高中英语北师大版Unit2SportsandFitnessLesson3RunningandFitn
Ask Ss to read Dr Martin’s Reply Give students instructions and help and guide Ss to finish their reading tasks.
Review the infinitives learned in U1 to express students’ ideas about sports and fitness; Watch the short video about running to make some connection between themselves and running.
Learn some key language points and sentences.
Period 3
Indefinite Pronouns
Homewor k
Teach
indefinite
pronouns to Ss and help Ss consolidate by doing
Learn different pronouns and use them to finish some exercise
Develop students’readi ng skills as well as critically thinking and competence to summarise.
Period 2
Review and continue reading(T hree Principles of running)
Develop students’ reading skills(scannin g) and critical thinking as well as accumulate their knowledge about how to go running properly.
数控铣床操作工(CNC milling operator)
数控铣床操作工（CNC milling operator）CNC milling operatorI. conditions for registration1, with one of the following conditions, may apply for an entry-level job:(1) working in the same profession for two years or more than four years;(2) completion of primary training.2, with one of the following conditions, may apply for intermediate workers:(1) the initial work grade certificate of the declared profession (work) shall be three years;(2) obtain the primary work certificate of the declared profession (job) and finish the training through the intermediate worker training;(3) graduates of institutions of higher learning and secondary specialized schools are engaged in Vocational and technical work corresponding to their major.3, with one of the following conditions, may apply for senior staff:(1) obtaining the intermediate work grade certificate of thedeclared profession (work) for four years;(2) obtain the intermediate work grade certificate of the declared profession (work) and finish the training through senior engineer;(3) graduating from institutions of higher learning and obtaining intermediate job certificates of the profession (work) to be declared.Two, examination outline(1) basic requirements1 professional ethics1.1 basic knowledge of professional ethics1.2 code of practice(1) comply with laws, regulations and relevant regulations.(2) love and respect, have high sense of responsibility.(3) strictly implement work procedures, work specifications, process documents and safety operation procedures.(4) serious and responsible work and unity and cooperation.(5) take care of equipment and tools, jigs, knives and measuring tools.(6) dress neatly and comply with the regulations; keep the working environment clean and orderly and civilized production.2. basic knowledge2.1 basic theoretical knowledge(1) knowledge of drawing.(2) tolerances and fits.(3) common metal materials and heat treatment knowledge.(4) commonly used non-metallic materials.2.2 basic knowledge of machining(1) knowledge of mechanical transmission.(2) knowledge of equipment used in machining (classification, use).(3) knowledge of metal cutting tools.(4) the processing technology of typical parts (spindle, box, gear, etc.).(5) equipment lubrication and use of cutting fluid.(6) knowledge of pneumatics and hydraulics.(7) knowledge of tools, fixtures and gauges usage and maintenance.2.3 basic knowledge of locksmith(1) marking knowledge.(2) the fitter operation knowledge (chisel and rasp, sawing, drilling, reaming, tapping, thread sets).2.4 electrical knowledge(1) types and applications of common equipment used in general equipment.(2) basic knowledge of electric drive and control principle.(3) safe use of electricity.2.5 knowledge of safe, civilized production and environmental protection(1) civilized production requirements at site.(2) knowledge of safe operation and labor protection.(3) knowledge of environmental protection.2.6 quality management knowledge(1) the quality policy of the enterprise.(2) quality requirements of the position.(3) post quality assurance measures and responsibilities.2.7 knowledge of relevant laws and regulations(1) labor law related knowledge.(2) relevant knowledge of contract law.(two) grade requirementsThis standard requires junior, intermediate and advanced skills to be advanced in succession, including high-level requirements.1. primaryOccupational functionJob contentSkills requiredRelevant knowledgeA,workartaccurateprepare(1) drawings and drawings;1. able to read simple rectangular parts with sloping surfaces, shafts with grooves or keys, sleeves, and polyhedron with steps or grooves;2. can draw with inclined or groove shaft and cone sleeve and other simple parts drawing.1. representation of general parts drawings;2. drawings of gears, spline shafts, and simple parts such as bevel and groove.(two) making the processing technology;1. correctly select the process standards for the machined parts;2. correctly select step order, cutting parameters and cutting fluid.1. milling process of general workpiece;2. CNC milling machine process code.(three) NC program1. familiar with the meaning of G, M and other codes;2. read simple machining procedures.1. knowledge of machine tool coordinate and workpiece coordinate system;2. basic knowledge of NC programming.(four) workpiece positioning and clamping;1. can choose the positioning criterion of the workpiece correctly2. can correctly use the milling machine commonly used fixture and pneumatic, hydraulic automatic clamping device.1. workpiece positioning principle and clamping requirements;Use of 2. dividing head.(five) tool preparation;1. can correctly select and install CNC milling machine commonly used tools;2., reasonable choice of cutting parameters.1. the influence of angle of milling cutter on cutting force and cutting heat.2. kinds, structure, performance and application of NC milling cutter.(six) equipment adjustment and maintenance;1. routine inspection of machine tools before machining2. can carry on the daily maintenance of numerical control milling machine1. CNC milling machine control and transmission system;2. CNC milling machine lubrication system;3. CNC milling machine operating procedures;Two,workpiecepluswork(I) input program1. can input programs manually;2. can use automatic program input device;3. can run program and necessary process parameter modification.1. the meaning of absolute coordinate and relative coordinate;2. the meaning and call of main program and subprogram.(two) tool setting1. can correctly test cutting tool;2. correct use of automatic tool setting instrument;3. can correct tool compensation correctly.1. the method of cutting tool presetting and the using method of tool setting instrument;2. the role of tool compensation.(three) test run;It can carry out program running, program segmentation and automatic cutting operation.Program running mode and screen drawing.(four) machining workpieceIt can process simple surface and planar hole system.Adjustment of cutting parameters, selection of lubricating fluid and calculation of tool allowance.Three,essencedegreecheckCheckanderrordifferencebranchAnalysis(1) inspection of flat and rectangular workpieces, steps and grooves;1. can use the common measuring tools to check the linear value of the workpiece;2. can do general angle value test.1. use and maintenance of common measuring tools;The basic use of 2. gauge blocks.(two) inspection of special shaped surface1. can inspect parallel hole, spline and rack;2. can use gear caliper, common line length micrometer and universal angle ruler correctly.1. gear caliper, common line length micrometer, universal angle ruler and other measuring tool construction principle, use and maintenance methods2. intermediateOccupational functionJob contentSkills requiredRelevant knowledgeworkartaccurateprepare(1) drawings and drawings;1. able to read parts of intermediate speed, cam, gear, clutch, complex parts with linear forming surface and curved surface2. able to read the assembly drawing of simple mechanism such as indexing tailstock, collet, sleeve and indexable milling cutter structure3. can draw with inclined or groove shaft and rectangular parts cone sleeve and other simple parts drawing1. representation of complex parts2. drawings of simple parts such as gears, spline shafts, and parts with bevel and groove parts(two) making the processing technology;The milling process of the general difficult workpiece, such as rectangular body, parallel hole system and arc curvedsurface, can be worked out. Its main contents are as follows:1. correct selection of process standards for machined parts2. determine the sequence of steps, steps and cutting parameters1. milling process of workpiece with general complexity2. NC milling machine process preparation(three) programmingAble to program simple milling procedures1. knowledge of machine tool coordinate and workpiece coordinate system2. basic knowledge of NC programming(four) workpiece positioning and clamping;1. can choose the positioning criterion of the workpiece correctly2. can correctly use the milling machine commonly used fixture and pneumatic, hydraulic automatic clamping deviceMethod for using pneumatic and hydraulic automatic clamping device(five) tool preparation;1. can correctly select and install CNC milling machine commonly used tools2., reasonable choice of cutting parameters1. NC milling tools and cutting parameters2. kinds, structure, performance and application of NC milling tools(six) equipment adjustment and maintenance;1. can adjust the CNC milling machine,2., before processing, into the machineRoutine check upsThreeBe able to do routine maintenance of CNC milling machine1. CNC milling machine working principle and adjustment method2. CNC milling machine operating procedures3. daily maintenance of CNC milling machineTwo,workpiecepluswork(I) input program1. can input programs manually2. can use a variety of automatic program input device3. can edit and modify the program1. the meaning of machine tool coordinate system and workpiece coordinate system2. the use of various program input devices(two) tool setting1. can correctly test cutting tool2. can use all kinds of in machine automatic tool setting instrument correctly3. can correct the cutter compensation1. the method of cutting tool presetting and the use of varioustool setting instruments2. amendment method of cutter compensation(three) test run;It can carry out the trial run, the program segmentation and the automatic operationVarious modes of operation of the program(four) machining simple workpiecesAble to process parallel holes and simple surfacesMethod for processing parallel hole system and simple profile surfaceThree,essencedegreecheckCheckanderrordifferencebranchAnalysis(1) inspection of flat and rectangular workpieces, slopes, steps, and grooves;Can use the common measuring tool and gauge, sine, gauge and gauge etc. high inspection precision of workpiece dimensions and anglesUse and maintenance methods of 1. gauge, gauge, level gauge, sine gauge(two) inspection of special shaped surface1. can carry out parallel hole system, clutch, gear, rack, forming surface, spiral surface, cam and tool alveolus inspection2. can use gear caliper, regular line length micrometer, sample plate, tool and universal angle ruler correctly2. gear caliper, common line length micrometer, tool universal angle ruler, as well as templates, sets of gauges and other special measuring principle of construction, use and maintenance methods3. seniorOccupational functionJob contentSkills requiredRelevant knowledgeA,workartaccurateprepare(1) drawings and drawings;1., can read the propeller, reducer box, a number of non constant speed cylindrical cam and other complex parts of deformed plans2. can draw constant speed cam, worm, spline shaft, straight bevel gear, special milling cutter and other parts of the complex degree of plans3. able to read the assembly drawing of the general mechanismsuch as indexing head and rotary table4. can draw simple parts of the axonometric drawing1. draw complex malformed zeroMethod of sheet drawings2. general mechanical assembly drawingRepresentation3. draw simple part axisMapping method(two) making the processing technology;Be able to work out milling process cards and programs with two-dimensional and simple 3D surface1. 、 knowledge of milling process with two-dimensional and simple 3D surface2. forming surface, cam, hole system, mold and other complex parts of the milling process(three) programmingBe able to work out milling procedures for complex partsProgramming method with two-dimensional and simple 3D surface workpiece(four) workpiece positioning and clamping;1. can correctly use and adjust the milling machine with all kinds of clamps2. can design simple special fixture for NC milling machineAssembly method of integral and general combined clamp(five) tool preparation;Correct selection of special cutters and special toolsSelection method of common cutting tools in NC milling machine(six) equipment adjustment and maintenance;1. can adjust several typical CNC milling machines2. can eliminate programming errors,General faults such as over range, under pressure and oil shortage3. daily and regular maintenance of CNC milling machine according to instruction1., CNC milling machine alarm information content andtroubleshooting methods2. CNC milling machine maintenance methods3. CNC milling machine structure and working principleTwo,workpiecemachiningMachining complex workpiecesAble to process complex workpieces and complex surfaces1. machining methods of large and complex workpieces2., difficult to processing materials, difficult to process workpieces and precision workpiece processing methodsThree,accuracytestAnd errorDifferenceAnalysisInspection of spiral gear, die surface and complex large workpiece1. can carry out the inspection of the spiral alveolus, the end face alveolus and the conical surface alveolus, the mold surface and the complex large-scale work pieceTwoTo properly test using a lever micrometer, microkators, level meter, optical dividing head and precision measuring instrument1. inspection methods for complex surfaces and large workpieces2. structure and principle of precision measuring and measuring instrument and optical indexing head, and how to use and maintain them3. digital display device construction and use methodFour,TrainguidanceInstruction operationTo guide the early and intermediate milling operation The basic method of directing actual operations Hydrometer1 theoretical knowledgeItemprimaryintermediateseniorBasic Requirementsprofessional ethicsFiveFiveFiveBasic knowledgeTwenty-fiveTwenty-fiveTwentymutuallyshutknowknowledgeProcess preparationTwenty-fiveForty-fiveFiftyWorkpiece processingThirty-fiveFifteenFifteenAccuracy test and error analysis TenTenTenTraining guidance ______Administration______TotalOne hundredOne hundredOne hundred2 skill operation ItemprimaryintermediateseniorworkdowantseekProcess preparation TwentyThirty-fiveThirty-five Workpiece processing SeventySixtySixtyAccuracy test and error analysis TenFiveFiveTraining guidance______Administration______TotalOne hundredOne hundredOne hundred。
师大必修Unit2_Lesson2_公开课课件
1. Remember to do _a__w_a_r_m__-u_p_ before you run. 2. Don’t run too fast _f_o_r_t_h_e_f_ir_s_t_h_o_u_r_. 3. Your last meal should be _a_t _le_a_s_t_o_n_e__h_o_u_r_ before your run. 4. Don’t _d_r_in__k_t_o_o_m__u_c_h_ while running.
Activate and Share Read the rules. Match them with the sports. (Ex.1)
a. volleyball b. boxing c. basketball d. tennis
(c )1. A player must bounce the ball as he or she moves
down the court.ቤተ መጻሕፍቲ ባይዱ
(d)2. When the ball is in play or if a player is serving,
do not cheer or talk loudly.
(a)3. The team may touch the ball no more than three
Listen for Understanding Pair work Listen again. Choose a sport and introduce its rules / tips to your partner. (Ex.3)
Rules / Tips
2. You can’t _k_ic_k_,_b__it_e_o_r__p_u_s_h the other person, either. 3. You are prohibited from _h_it_t_in_g__t_h_e_o_t_h_e_r_p_e_r_s_o_n_ with your head, shoulder or arm.
solidworks圆柱度公差
solidworks圆柱度公差
在SolidWorks中，对于圆柱度公差的定义和应用可以通过"配合公差"（Fits and Tolerances）功能来实现。
圆柱度公差是指对于圆柱体的直径或直径偏差的允许范围。
具体的设置步骤如下：
1. 打开SolidWorks并打开相应的零件文件。
2. 选择需要添加圆柱度公差的圆柱体或圆柱体特征。
3. 在特征管理器中，右键点击选择该特征，然后选择"显示尺寸"（Show Dimension）。
4. 选择显示尺寸后，可以在零件图形中显示圆柱体的直径尺寸。
5. 双击直径尺寸或右键点击选择"属性"（Properties）来打开尺寸属性对话框。
6. 在尺寸属性对话框中，选择"公差"（Tolerance）选项卡。
7. 在公差选项卡中，选择"圆柱度"（Cylindricity）作为公差类型，并设置所需的公差值。
8. 完成设置后，点击"确定"来应用圆柱度公差。
注意：在设置圆柱度公差时，请确保理解所需的公差范围，以确保零件满足设计要求。
在实际设计和制造过程中，通常需要考虑不同的公差类型和堆叠公差的影响，以确保零件能够正确配合和装配。
此外，在工程实践中，可能还需要参考相关的国家或国际标准来确定合适的公差要求。
1/ 1。
土木工程应用英语教学参考书Unit2
Unit 2 Construction MaterialsSectionI Talking Face to Face1. IntroductionIn this unit, we are going to learn two important construction materials---steel and cement, as well as their distinctive identities. Further more, how the two basic materials complement each other to make structural construction material---concrete. The many professional phrases and expressions of construction materials are the learning points in this unit.Ask students to read dialogue and then make dialogues according to the task.2. Explaining some words and expressions in the dialogue:Dialogue one:the strength of the concrete：混凝土的强度compressive strength：抗压强度kg/cm2 ：kilogram n.公斤；centimeter n.厘米；square centimeter平方厘米look forward to + n./doing…期待着…Dialogue two:on our own：独立地，凭我们自己conform with：和……相符合，相一致China National Building Code：中国建筑法规plot plan：平面布置图vertical layout：竖向定位图structure plan：结构平面图floor plan：楼面平面图general plan：总图the job site：施工现场SectionII Maintaining a sharp eyePassage1 Construction Materials---steel and cement Important words1.acid n. [化] 酸(U,C)Some acids burn holes in wood. 有些酸能把木头烧成洞。
王蔷英语教学法unit2总结(学科英语考研)
Unit 2 Communicative Principles and TBLT2.1 Language use in real life vs. traditional pedagogy①Focus: In real life, language is used to perform certain communicative functions, (e. g .to give directions, to exchange information, or to make a complaint) in a traditional language classroom, the teaching focus is often on forms rather than functions.②Skills: Traditional pedagogy tends to focus on one or two language skills and ignore the others. In real language use we use all skills, including receptive skills such as listening and reading, and productive skills such as speaking and writing.③Context: In reality language is always used in a certain context, but traditional pedagogy tends to isolate language from its context.2.2 What is communicative competence?①名词解释：⑴Communicative competence is the goal of Communicative Language Teaching, which includes both the knowledge of the language itself and the knowledge of how to use language appropriately in communicative situations.⑵Five main components of communicative competence are linguistic competence, pragmatic competence, discourse competence, strategic competence, and fluency.②简答：①+the main components of communicative competence.(每个competence的⑴)③论述：②+In other words, it is one’s ability to express or to understanda topic logically and coherently by effectively employing or comprehending the cohesive markers used in the discourse such as “by the same token”, “at last” and also the reference words such as “it”, “they”, etc. in the context.2.3 What are the main components of communicative competence?(每个competence都可以出名词解释，回答⑴⑵)Five main components of communicative competence are linguistic competence, pragmatic competence, discourse competence, strategic competence, and fluency.①Linguistic competence:⑴It is concerned with the knowledge of the language itself, its form and meaning.⑵More specifically, it involves spelling, pronunciation, vocabulary, wordformation, grammatical②Pragmatic competence:⑴Pragmatic competence is concerned with the appropriate of the language in social context.⑵That is to say, the choice of the vocabulary and structure depends on the setting, the relative status of the speakers, and their relationships.③Discourse competence:⑴Discourse competence refers to one’s ability to create coherent written text or conversation and the ability to understand them.⑵In other words, it is one’s ability to express or to understand a topic logically and coherently by effectively employing or comprehending the cohesive markers used in the discourse such as :“by the same token”, “to put it in other words”,“first”，“second”,“at last”, and also the reference words such as“it”,“they”,“that”,etc. in the context.④Strategic competence:⑴Strategic competence refers to strategies one employs when there is communication breakdown due to lack of resources.⑵One can compensate for this by searching for other means of expressions, such as using a similar phrase, using gestures, or using a longer explanation.⑤Fluency: It means one’s ability to “link units of speech together with facility and without strain or inappropriate slowness or undue hesitation”2.4 What is CLT(名词解释)?①CLT refers to Communicative Language Teaching. It is one type of teaching method to cultivate communicative competence.②The goal of CLT is to make students know the knowledge of the language and the knowledge about how to use language appropriately in communicative situations. That’s to say, CLT not only focus on the linguistic knowledge but the functions of language such as advising, inviting suggesting, etc., which students should learn how to use.③The principles of CLT are communicative, task and meaningfulnessprinciples.④There are two versions of CLT proposed by Howatt, to describe the ways of language learning.2.5 What are the criteria for evaluating how communicative classroom activities are?①Communicative purpose: The activity must involve the students in performing a real communicative purpose rather than just practicing language for its own sake.②Communicative desire: The activity must create desire to communicate in the students. That is, even if communication is forced on the students, they must feel a real need to communicate.③Content, not form: When the students are doing the activity, they must be concentrating on what they are saying, not how they say it.④Variety of language: The activity must involve the students in using a variety of language, not just one specific language form.⑤No teacher intervention：The activity must be designed to be done by the students working by themselves rather than with the teacher.⑥No material control: The activity should not be designed to control what language the students should use. The choice about what language to use should rest with the students.2.6 How do you understand Task-based Language Teaching? (TBLT)（名词解释）①Task-based Language Teaching (TBLT)refers to an approach based on the use of task as the core unit of instruction in language.②Task-based Language Teaching is, in fact, a further development of Communicative Language Teaching.③It shares the same beliefs, as language should be learned as close as possible to how it is used in real life.④However, it has stressed the importance to combine form-focused teaching with communication-focused teaching.2.7 What does a task refer to? （名词解释）[A task is] an activity which requires learners to arrive at an outcome from given information through some process of thought, and which allows teachers to control and regulate that process.2.8 What are the four components of a task? (PPP+C)A task has four main components: a purpose, a process, a product and a context.①a purpose: making sure the students have a reason for undertaking the task②a process: getting the students to use learning strategies such as problem solving, reasoning, inquiring, conceptualizing and communicating③a product: there will be some form of outcome, either visible or invisible④a context: this can be real, simulated or imaginary, and involves sociolinguistic issues2.9 What are the differences between tasks and exercises?①When the students are carrying out a task, they are focusing on the complete act of communication. (fluency)②When the students focus their attention on individual aspects of language, such as vocabulary, grammar or individual skills. We can call these activities exercise. (accuracy)2.10 What is PPP?(名词解释:①②)①It refers to Presentation, Practice and Production model of teaching.②At the presentation stage, the teacher introduces new vocabulary and grammatical structures in whatever ways appropriate. At the practice stage, the lesson moves from controlled practice to guided practice and exploitation of the texts when necessary. At the production stage, the students are encouraged to use what they have learned and practiced to perform communication tasks. At the last stage, the focus is on meaning rather than accurate use of language forms.③Some of the advantages of the PPP model are that first it is clear and easy to conduct by the teachers. Secondly, it is easy to evaluate as there are often clear goals to be obtained. Thirdly, there is the belief that learning with a focus on rules can be automatized through practice as “ a set of habits”.④The disadvantage is that students will not automatically acquire the language and use them in real life if only rules are introduced and mechanical exercises are emphasized.2.11 How to design tasks?①Think about students’ needs, interest, and abilities②Brainstorm possible tasksBear in mind that a task should have a communicative purpose and should be goal-oriented.③Evaluate the listAfter you have brain stormed the possible tasks, you can use the following criteria to evaluate them.⚫Educational value⚫Appropriateness to the students’ needs, interests and abilities⚫Availability of suitable resources⚫Time available④Choose the language items⑤Preparing the materials。
Unit 2 Fruitful Questions课文讲解
Edward Jenner
爱德华· 詹纳 (Edward Jenner) （1749–1823） 英国医生，以研究及推 广牛痘疫苗，防止天花 而闻名，被称为免疫学 之父，并且为后人的研 究打开了通道，促使巴 斯德、科赫等人针对其 他疾病寻求治疗和免疫 的方法。
Handan College
Jenner was an English country doctor who pioneered vaccination. Edward Jenner was born on May 17, 1749 in the small village of Berkeley in Gloucestershire. From an early age Jenner Before Reading Global Reading Detailed Reading was a keen observer of nature and after nine years as aAfter Reading surgeon’s apprentice he went to St. George’s Hospital, London to study anatomy (解剖学) and surgery under the prominent surgeon Hohn Hunter. After completing his studies, he returned to his hometown Berkeley to set up a medical practice where he stayed until his death in 1823. In the eighteenth century, before Jenner, smallpox (天 花) was a killer disease, as widespread as cancer or heart diseases in the twentieth century but with the difference that the majority of its victims were infants and young children. Edward Jenner pioneered vaccination. Jenner’s discovery in 1796 that vaccination with cowpox (牛痘) gave immunity (免疫) to smallpox, was an immense medical breakthrough and has saved countless lives. In 1980, as a result of Jenner’s discovery, the World Health Assembly officially declared “the world and its peoples” free from endemic (地方性的) smallpox.
师大必修Unit1 Lesson2 精品课件
(confidence), but the most fascinating finding to me was how their
physical stress response changed.7. And this is one of the reasons that
chronic（慢性的，长期的） stress is sometimes associated with
5. But what if you viewed them instead as signs
your body was
energized, was preparing you to meet this challenge? Now that is
(exact) what participants were told in a study conducted at Harvard
Listen and complete the table in Ex. 4.
Kinds of people suffering teachers, doctors, workers,
from stress
editors, police, military
Causes of stress
Ways to reduce stress
(design) to stress you out. It's called the
social stress test. 4. And normally, we interpret these physical changes as
anxiety or signs thatwe aren't coping very well with the pressure.