数控技术应用专业英语(第三版)配套资源习题参考答案

学习情境一任务1习题参考答案EXERCISE 1Fill in the blank according to the text.te2.turning drilling3.main feedrge diameter disc –type5.headstock guide way tailstock6.the hydraulic cylinder the chuck7.the turret fast-moving cutting fluid switch EXERCISE 2Match A with B.EXERCISE 3Choose the best answer.1.c2. a3. c4. b5.aEXERCISE 4Answer the following questions briefly according to the text.1.The program is changed.2. a longer axial dimension or a small disk type workpieces3.construction casting molded with resin4. the hydraulic system pressure5. by graphics and text symbols which represent the connection between electrical components and electrical works in the circuits.任务2习题参考答案EXERCISE 1Write the English name of each tool on the corresponding number.1.center drill2. external turning tool3. twist drill4. thread toolEXERCISE 2Match A with B.EXERCISE 3Fill in the blank according to the text.1. dimensional2. perpendicularity3. quenching4. taper5. High-speed steel（HSS）6. function adequately7. Cemented carbides8. negativeEXERCISE 4Answer the following questions briefly according to the text.1.The symbol means symmetry.2. Positive rake angle reduces the cutting forces resulting in smaller deflections of the workpiece, tool holder and machine.3. Depth of cut is defined as the distance that the cutting tools is plunged into the workpiece.4. It is generally recommended to use higher feed rate for roughing operations.5. The cutting speed is dependant primarily upon the material being machined as well as the material of the cutting tool .There are also other variables that affect the optimal value of the cutting speed. These include the tool geometry, the type of lubricant and coolant, the feed and the depth of cut etc.6. If the depth of cut is too large, the insert may be overloaded, causing immediate breakage.7. Center drill and twist drill are required in drilling operation.EXERCISE 5Make calculation using the formula in the text.1. n=1000V/πD= 1000×157/50π =1000 r/min2. a p =(d w-d m)/2=(50-46)/2=2mmEXERCISE 6Write down the symbols and Chinese meaning according to the description of the geometry tolerance.任务3 习题参考答案EXERCISE 1Match A with B.EXERCISE 2Answer the following questions briefly according to the text.1. It usually starts with “o” or “%”.2. The programmer.3. M02 or M30.4. If the programmer makes a mistake in incremental program, every incremental movement from that point will be incorrect.5. The manufacturer.6. The preparatory codes or words are called G codes.7. Coordinates from the program zero point is called absolute mode of programming.EXERCISE 3Mark the following statements with T（true）or F（false）.1.T2.F3.T4.F5.F6.F7.T8.FEXERCISE 4Fill in the blanks according to the text.1. miscellaneous2. X and Z axes3. distance4. a new value is specified5. rough out6. machine; workpiece; local7. program zero任务4习题参考答案EXERCISE 1Match A with B.EXERCISE 2Answer the following questions briefly according to the text.1. The cursor keys.2. The feed rate knob.3. Rotate the feed rate knob clockwise.4. The EOB key .5. MDI is used to perform manual functions that cannot be done in the manual mode.6. We used the address/number key to input the program number.7. You input the new value, and press the input key.EXERCISE 3Mark the following statements with T（true）or F（false）.1. F2. T3. F4. F5. T6. F7. F8. TEXERCISE 4Fill in the blanks according to the text.1. jog2. increases3. program key4. page key5. input key6. offset key任务5习题参考答案EXERCISE 1Match A with B.A BEXERCISE 2Answer the following questions briefly according to the text.1. It usually consists of sleeve, thimble, anvil, spindle and ratchet etc.2. First, read the whole number on the main scale. The main scale is read by taking note of where the zero mark on the vernier scale falls on the main scale. Second, read the decimal on the vernier scale. This number is taken as the line on the vernier scale that aligns with any line on the main scale. Finally, add the whole number and decimal together as the final measuring result.3. First, take the thimble’s end surface as the directrix, you read the markings on the sleeve. Second, take the center line on the sleeve as the directrix, read the markings on the thimble. Finally, add all the numbers together to determine the dimension of your workpiece.4. It can trace the surfaces of various machine parts, calculates surface roughness based on standardsroughness specimen and displays the results.5. A coordinate measuring machine is comprised of four main components. They are the main itself, the measuring probe, the controlling system for computer and the measuring software. EXERCISE 3Read the following vernier calipers（the precision is 0.02 mm）.20.46mm 16.38mmEXERCISE 4Read the following outside micrometers（the precision is 0.01 mm）.3.079mm 9.130mm学习情境二任务1习题参考答案EXERCISE 1Match A with B.EXERCISE 2Answer the following questions briefly according to the text.1.Machining center has been defined as multifunction CNC machine with automatic tool-changing capabilities and tool magazine.2.The main components of CNC machining center are bed, saddle, column, table, servo system, spindle, tool changer and the machine control unit.3.The servo system consists of servo drive motor, ball screw and position feedback encoder etc.4.Machine control unit (MCU) is a computer used to store and process the CNC programs entered.5.They are vertical, horizontal and universal machining center.6.Vertical machining center widely accepted and used, primarily for flat parts.7. If lubricating oil is insufficient, liquid level switch SL3 is closed, I1.6 is closed in the network 7, also makes M0.7 to 1, disconnect the motor M and alarm.8. regulate the flow of compressed air.EXERCISE 3Mark the following statements with T（true）or F（false）.1.T2. F3.T4.T5.T6.T7. FEXERCISE 4Choose the best answer.1. a2. c3. b4. c5. b任务2习题参考答案EXERCISE 1Match A with B.EXERCISE 2Write the English name of each tool on the corresponding munber.1. dial test indicator2. Z-zero-setter3. face milling cutter4. reamerEXERCISE 3Fill in the blank according to the text.1. Dial test indicator2. edge-finder Z -zero -setter3. vernier caliperEXERCISE 4Choose the best answer.1.c2. b3.a任务3习题参考答案EXERCISE 1Match A with B.A BEXERCISE 2Answer the following questions briefly according to the text.1. G94 specify the amount of feed of the tool per minute, G95 specify the amount of feed of the tool per spindle revolution.2. If a program contains a fixed sequence or frequently repeated pattern, such a sequence or pattern can be stored as a subprogram in memory to simplify the program.3. By setting the difference between the length of the standard tool and the length of each tool in the CNC, machining can be performed without altering the program even when the tool is changed.4. The direction of the moving cutter during the machining and the placement of the surface being machined.5. By making the design in a CAD software, e.g. UG, Pro/Engineer SolidWorks and saving it ina format that MasterCAM X can import.displayed. You can search for a particular type by scrolling down the list or by using the filter buttonand entering the search information.7. The purposes of verifying the cutting process are：（1）To detect geometric error of the cutter path（2）To detect potential tool interference（3）To detect erroneous cutting conditionsEXERCISE 3Mark the following statements with T（true）or F（false）.1.F2. F.3. F4.T5. FEXERCISE 4Fill in the blanks according to the text.1. fixed sequence2. tool length compensation3. initial level4. “Filter”5. post-processing任务4习题参考答案EXERCISE 1Match A with B.A BEXERCISE 2Fill in the blank according to the text.1. manufacturer2. dry run3. automatic operation4. single block5. clockwise.6. open or close the cutting fluids7. reference pointEXERCISE 3Answer the following questions briefly according to the text.1.The key is used to adjust the feed rate.2. Switch on the main breaker at the rear of the machine then Press the which is located in the lower right corner of the operation panel.3. Programs can be created using any of the following methods: (1) MDI keyboard (2) Application of transmission software4. The dry run and single block function are commonly used for checking the program.5.The key is used to remove chips clockwise.EXERCISE 4Translate the English into Chinese（Fig.2 -4 -8）.学习情境三任务1习题参考答案EXERCISE 1Match A with B.EXERCISE 2Answer the following questions briefly according to the text.1. (1) It can machine complex shapes; (2) It can cut hard material with high accuracy; (3) It canmake very small workpieces; (4) It can make delicate sections and weak material;2. There are five commonly used electrodes: bras, scopper, tungsten, zinc and graphite.3. Sinker EDM has found widespread use not only in the manufacture of mold making, but also in aerospace applications and the production of small holes and micro holes.EXERCISE 3Mark the following statements with T（true）or F（false）.1. T2. T3. F4. T5. TEXERCISE 4Fill in the blanks according to the text.1. machining2. hard3. traditional4. conductive5. treatment任务2习题参考答案EXERCISE 1Match A with B.EXERCISE 2Answer the following questions briefly according to the text.1. (1) Material of any hardness can be cut (2) high accuracy and good surface finish are possible (3) no cutting forces involved.2. The differences between high speed WEDM and low speed WEDM are as following:3. The main components of CNC WEDM are CNC system, pulse power, wire drive mechanism, dielectric fluid regeneration system.EXERCISE 3Mark the following statements with T（true）or F（false）.1. F2. T3. F 4 TEXERCISE 4Fill in the blanks according to the text.1. conductive2. discharges3. Wire4. dielectric5. workpiece6. gap任务3习题参考答案EXERCISE 1Write the English name on the corresponding number.ser,2.beam guiding,3.cutting nozzle,4.coordinate table,5.control unit,6.system for energy supplyEXERCISE 2Match A with B.A BEXERCISE 3Fill in the blank according to the text.1. laser beam2. melts3. gas jet4. cutting steel.5. high machining precisionEXERCISE 4Answer the following questions briefly according to the text.1. When a high energy density laser beam is focused on a small spot on the workpiece by a lens; focused beam melts, vaporizes, or combusts material; molten material is ejected out from the melt area by pressurized gas jet.2. No physical contact machining. To some extent precision, since there is no wear on the laser. There is also a reduced chance of warping the material that is being cut, as laser systems have a small heat affected zone.学习情境四任务1习题参考答案EXERCISE 1Match A with B.EXERCISE 2Answer the following questions briefly according to the text.1. Main potential hazards includes: rotating components, such as the tool in the spindle; movable components, such as the machining center table, lathe slides; errors in the program such as changing a proven program randomly.2. Stop the machine.3. Because it can be a source of vibration that can break the insert.4. Choose different cutting conditions.5. Use a single-block execution function。