2023年全國碩士研究生考試考研英語一試題真題(含答案詳解+作文范文)_第1頁
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1、<p><b>  外文原文</b></p><p>  Session 25- Configure to Simulate a G-Code Milling Tool Path</p><p>  This session shows how to configure VERICUT for processing a G-Code tool path fi

2、le . The sample "3axtltip.mcd" G-Code tool path file to be simulated has been programmed to drive the tool tip. The tool path is destined to be run on a 3-axis vertical mill similar to the one shown below. A Ma

3、zak Mazatrol M-32 CNC milling control interprets the G-codes for this milling machine. </p><p>  Sample 3-axis vertical mill: </p><p>  The Machine Simulation system provides many sample machine

4、 and control configurations which users can choose to simulate their NC machining environment. This session demonstrates how to create a User file for a specific NC machine and control combination for simulating the G-Co

5、de tool path. </p><p>  The basic requirements for G-Code tool path simulation are the same as for any other tool path type (stock, tool path, and cutting tool descriptions), however, there are additional co

6、nsiderations: </p><p>  Tool descriptions are not typically present in a G-Code tool path file. A Tool Library is typically used to supply cutter descriptions. </p><p>  VERICUT must have knowle

7、dge of the NC machine kinematics & control capabilities, as well as job-related data such as: the initial machine location prior to G-Code processing, offset register values entered at the NC control, etc. With

8、the Machine Simulation system, this information is stored as follows: </p><p>  - kinematics properties of an NC machine are stored in a Machine file </p><p>  - information about the

9、capabilities and methods of how an NC control interprets G-Codes is stored in a Control file </p><p>  - job-related data, as well as the names of the above mentioned Machine and Control files are store

10、d the User file     </p><p>  Session Steps: </p><p>  1. Start a new VERICUT session in Inch units</p><p>  File > Properties </p><p>  Default Units=In

11、ch, OK </p><p>  File > New Session </p><p>  If prompted, respond as follows: Reset cut model? Yes / Save changes? No</p><p>  2. Add a 5 x 6 x 2 inch block stock

12、 model</p><p>  View > Axes </p><p>  Select Model and Driven Point Zero </p><p><b>  Close </b></p><p>  Model > Model Definition: Model tab <

13、;/p><p>  Type=Block </p><p>  Length(X)=5, Width(Y)=6, Height(Z)=2 </p><p><b>  Add </b></p><p><b>  Fit   </b></p><

14、;p><b>  Cancel </b></p><p>  3. Specify the sample "3axtltip.mcd" G-Code tool path file to be simulated</p><p>  Setup > Toolpath </p><p>  Toolpath Type

15、=G-Code Data </p><p><b>  Add </b></p><p>  Shortcut=CGTECH_SAMPLES </p><p>  File Name=3axtltip.mcd, OK </p><p><b>  OK </b></p>&l

16、t;p>  4. From the CGTech library, use the "g3vmtt.mch" generic 3-axis mill with "mazm32.ctl" Mazak Mazatrol M-32 CNC milling control</p><p>  Setup > Machine > Open</p>&l

17、t;p>  Shortcut=CGTECH_LIBRARY</p><p>  File Name=g3vmtt.mch, Open </p><p>  Setup > Control > Open </p><p>  Shortcut=CGTECH_LIBRARY</p><p>  File Name=ma

18、zm32.ctl, Open</p><p>  5. Specify that "tool tip" programming is used for this tool path</p><p>  Setup > G-Code > Settings: Settings tab </p><p>  Programming

19、 Method=Tool Tip </p><p><b>  OK </b></p><p>  6. Orient the tool path origin to the top left corner of the stock, as shown below</p><p>  Setup required for tool path &

20、quot;3axtltip.mcd": </p><p>  Setup > G-Code > Settings; Tables tab </p><p>  Add/Modify </p><p>  Table Name = Program Zero </p><p>  Select From/To Locatio

21、ns </p><p>  From, Name = Tool </p><p>  To, Name = Stock </p><p>  Click on the selection icon on the "To" row   </p><p>  Click top left corner. (

22、value should be 0 0 2) </p><p><b>  Add </b></p><p><b>  Close </b></p><p><b>  OK </b></p><p><b>  Reset </b></p>

23、<p>  The "3axtltip.mcd" tool path contains "T" words which specify the tool number of the cutters used to machine the part. The "3axtltip.tls" Tool Library file contains cutter descr

24、iptions that correspond to the tool numbers referenced in this G-Code tool path. </p><p>  7. Configure VERICUT to use cutting tools stored in the sample "3axtltip.tls" Tool Library file</p>

25、<p>  Setup > Tool Manager </p><p>  File > Open </p><p>  Shortcut=CGTECH_SAMPLES </p><p>  File Name=3axtltip.tls, Open </p><p>  Tool Manager: 

26、File > Close, Yes </p><p>  8. Cut the model</p><p>  Play to End  </p><p>  Session 26- Use a Tool List and Master Tool Library</p><p>  This session shows how

27、 to use VERICUT's Tool Manager to define cutter shapes and store them in a master Tool Library file for easy access by everyone. Master tool libraries typically have tool identification (ID) values that differ from t

28、he "T" numbers in the G-code tool path file. A tool list is used to cross-reference(交叉引用)G-code tool change blocks to access tool descriptions stored in the Tool Library file. This feature makes it possible to

29、define a single Tool Library file containing all ava</p><p>  Session Steps:</p><p>  1. In VERICUT, open the "bars.usr" User file</p><p>  File > Open </p><

30、p>  Shortcut=CGTECH_SAMPLES </p><p>  File Name=bars.usr, Open </p><p>  If prompted, respond as follows: Reset cut model? Reset / Save changes?  No </p><p>  File >

31、 Properties </p><p>  Default Units=Millimeter, OK </p><p>  This assures that the units for a new Tool Library are set to millimeter. </p><p>  2. Access the Tool Manager and creat

32、e a new Tool Library file</p><p>  Setup > Tool Manager </p><p>  File > New </p><p>  3. Add tool ID "101": 15 dia., 150 ht., 118 deg. drill</p><p>  A

33、dd > New Tool > Mill </p><p><b>  ID=101 </b></p><p>  Description=15D 150H DRL </p><p>  Ensure Units=Millimeter </p><p>  Right-click > Cutter &l

34、t;/p><p><b>  Drill  </b></p><p>  Diameter (D)=15, Drill Point Angle (A)=118, Height (H)=150 </p><p>  OK (the drill is displayed) </p><p>  4. Add tool

35、ID "201": 25 dia., 150 height, flat bottom endmill</p><p>  Right-click > New Tool > Mill </p><p><b>  ID=201 </b></p><p>  Description=25D 150H FEM <

36、/p><p>  Right-click > Cutter </p><p>  Flat Bottom End Mill  </p><p>  Diameter (D)=25, Height (H)=150 </p><p><b>  OK </b></p><p>  5. A

37、dd tool ID "501": 60 dia., 3 cr., 25 ht. end mill</p><p>  Right-click > New Tool > Mill </p><p><b>  ID=501 </b></p><p>  Description=60D 3R 25H EM <

38、/p><p>  Right-click > Cutter </p><p>  Bull Nose End Mill  </p><p>  Diameter (D)=60, Corner Radius (R)=3, Height (H)=25 </p><p><b>  OK </b></p>

39、;<p>  6. Save the tools in a Tool Library file named "master.tls" and close the Tool Manager</p><p>  File > Save As </p><p>  Shortcut=Working Directory </p><p&g

40、t;  File Name=master.tls, Save </p><p>  File > Close, Yes </p><p>  7. Build a tool list that cross-references G-code tool numbers to tools in the Tool Library as follows: T1M6 uses ID101, T

41、2M6 uses ID201, T3M6 uses ID501</p><p>  Setup > Toolpath </p><p>  Tool Change By=List </p><p>  Use Tool list </p><p>  Make sure Prompt for Optipath is NOT select

42、ed </p><p>  Build Tool List -> scans the tool path and generates the following tool list based on tool pocket numbers: </p><p>  With Event 1 (T1M6) selected, enter Cutter ID=101 </p>

43、<p>  Select  Event 2 (T2M6), Cutter ID=201 </p><p>  Select  Event 3 (T3M6), Cutter ID=501 </p><p><b>  OK, OK </b></p><p>  8. Cut the model</p>

44、<p>  Reset Model  </p><p>  Play to End  </p><p>  Session 27- Use OptiPath Manager to Create an OptiPath Library</p><p>  This session shows how to use the Op

45、tiPath Manager function to define the OptiPath records required to optimize cutting in H13 tool steel (approx. 200 HB). Once defined, the OptiPath records are stored in an OptiPath Library file. The following sessio

46、n (Optimize Tool Path Feedrates via OptiPath tool list method) demonstrates how to configure VERICUT for optimizing a G-code tool path file, including using the OptiPath Library created during this session

47、. </p><p>  Session Steps: </p><p>  Define OptiPath Records</p><p>  1. Start from a new Inch User file</p><p>  File > Properties </p><p>  Default

48、60;Units=Inch, OK </p><p>  File > New Session </p><p>  If prompted, respond as follows: Reset cut model? Yes / Save changes? No </p><p>  2. Access the OptiPath

49、Manager</p><p>  OptiPath > Manager </p><p>  Optimization settings will be established differently to accommodate the different cutting performed by each tool (see below). The part will be c

50、ut on a 3ax vertical mill in a rigid setup. </p><p>  Cutters Used by Tool Path "op_mold.mcd": </p><p>  Tool 1 (T1): </p><p>  Description: .625 dia. 4 flute carbide

51、 flat end mill </p><p>  Operation: planar milling not to exceed .5" depth, 1200 RPM </p><p>  Feedrates for this tool will be established from a known successful cutting condition: assume

52、the cutter is successful cutting full width in .3" depth passes at 8 IPM feedrate. The feedrate used to enter material should not be more than 8 IPM. </p><p>  Tool 2 (T2): </p>&l

53、t;p>  Description: .75 dia. 4 flute carbide ball end mill </p><p>  Operation: semi-finish profile milling (kellering/lacing)(仿行銑) </p><p>  The light cuts performed by this tool will be

54、 optimized by constant volume combined with chip thickness. This method of optimization varies feedrates based on the volume of material removed. Assume volume removal rates are not known for this tool; OptiPath rec

55、ord will be copied from the Ingersoll OptiPath Library. </p><p>  Configure Optimization Settings for the .625 dia. Flat End Mill:</p><p>  3. Add and identify a new OptiPath record fo

56、r the .625 dia. flat end mill as follows:</p><p>  Stock material to be cut= H13 Tool Steel </p><p>  Machine that will cut the part= 3ax Mill </p><p>  Tool des

57、cription= .625D 1.50H FEM, Carbide </p><p>  #Teeth= 4 </p><p><b>  Add </b></p><p>  Click in the field under the "Material" heading, type:H13 Tool Steel

58、 </p><p>  Under Machine type: 3ax Mill </p><p>  Under Tool Description type:.625D 1.50H FEM, Carbide </p><p>  Under # Teeth type:4 </p><p>  Opti

59、Path Cutter Shape </p><p>  Flat Bottom End Mill  </p><p>  Diameter(D)=.625, Height(H)=1.5 </p><p><b>  OK </b></p><p>  4. Configure a known suc

60、cessful cutting condition for this cutter</p><p>  Axial Depth=0.3(Value can be adjusted with the slide bar or typed) </p><p>  Radial Width=.625 </p><p>  Feed Per Minute=8 </p&

61、gt;<p>  Spindle Speed=1200 </p><p>  Select Spindle Speed (when selected, optimized spindle speeds are supplied along with corresponding optimized feedrates) </p><p>  Und

62、er these conditions, Volume Removal rate is 1.5 cubic in. per minute. </p><p>  5. Select to optimize by "Constant Volume", use 150 IPM feedrate for cuts in air</p><p> 

63、 Select Volume Removal </p><p>  Clear Air Cut Feed Rate: "Default" </p><p>  Enter Air Cut Feed Rate=150 </p><p>  6. On the Optimization Settings tab, spe

64、cify settings for the following conditions:</p><p>  Settings tab </p><p>  Add More Cuts </p><p>  Clear all Default checkboxes (4 places) </p><p>  Minimum 

65、Feedrate Change=3 (minimum change required to output a different optimized feedrate) </p><p>  Clean-up Feedrate=85 (spring pass) </p><p>  Minimum Cut Feedrate=1 (okay as is) </p>&

66、lt;p>  Maximum Cut Feedrate=80 </p><p>  Circle Feedrate=Optimize (okay as is) </p><p>  7. Set an "Entry Feedrate" to enter material with 8 IPM feedrate (t

67、o begin .1 before contacting material - till .1 cut into material), then apply the optimization settings</p><p>  Entry/Exit tab </p><p>  Entry Feedrate=Feed/Minute: 8 </p><p>

68、;  Clearance Distance= 0.1 </p><p>  Cut Distance=0.1 </p><p>  Apply, enters all the above settings to the selected Optipath record </p><p>  8. Test how optimi

69、zation will be performed under various cutting conditions 調(diào)整優(yōu)化結(jié)果</p><p>  Testing ensures that optimization will be performed as expected. If unsatisfactory results are experienced, adjust optimization setti

70、ngs and re-test until satisfied. </p><p>  Feed/Speed Tab </p><p>  Enter various cut depths and widths, then observe the optimized Feed per Minute and Feed per Tooth values </p>

71、<p><b>  Example: </b></p><p>  Axial Depth=.1 => (Feed per Minute= 24) </p><p>  Radial Width=.5 => (Feed per Minute= 30) </p><

72、p>  Configure Optimization Settings for the .750 dia. Ball End Mill:</p><p>  9. Add a new OptiPath record for the .750 dia. ball end mill, edit the new record name as follows:</p><p&

73、gt;  Stock material to be cut= H13 Tool Steel (same as previous record) </p><p>  Machine that will cut the part= 3ax Mill (same as previous record) </p><p>  Tool description= .7

74、50D 1.50H BEM, Carbide </p><p>  #Teeth= 4 </p><p><b>  Add </b></p><p>  Tool Description = .750D 1.50H BEM, Carbide </p><p><b> 

75、 Teeth= 4 </b></p><p>  OptiPath Cutter Shape </p><p>  Ball Nose End Mill  </p><p>  Diameter(D)= .75, Height(H)=1.5 </p><p><b>  OK </b&

76、gt;</p><p>  10. Configure a known successful cutting condition for this cutter</p><p>  Clear Volume Removal checkbox </p><p>  Axial Depth=1(Value can be adjusted with t

77、he slide bar or typed) </p><p>  Radial Width=.125 </p><p>  Feed Per Minute=12 </p><p>  Spindle Speed=1200 </p><p>  Select Spindle Speed </p><p&

78、gt;  11. Configure OptiPath settings for this tool to be the same as for the previous tool, except optimize by "Constant Volume" and "Constant Chip Thickness" (continue to add more cuts when needed)&l

79、t;/p><p>  Select Volume Removal (1.5 cubic inch/minute) </p><p>  Select Chip Thickness (.0019' chip/tooth load) </p><p>  Settings Tab </p><p>  Notice tha

80、t all the settings defined for the first record have been carried when adding this record. </p><p><b>  Apply </b></p><p>  12. Test how optimization will be performed under various

81、cutting conditions</p><p>  13. After satisfactory test results, apply any changes made, then save an OptiPath Library file named "optipath.olb"</p><p><b>  Apply </b></

82、p><p>  OptiPath Manager: File > Save As </p><p>  Shortcut=Working Directory </p><p>  File Name=optipath.olb, Save </p><p>  This session demonstrated

83、how to create an Optipath Library that can be used to optimize cutting by different tools.    </p><p>  Session 28- Optimize Feed Rates via Tool Library Method</p><p>  This ses

84、sion shows how to configure VERICUT for optimizing a G-code tool path file by adding references to OptiPath records to tools stored in a previously defined Tool Library file. The sample G-code tool path file to be optimi

85、zed uses 2 cutting tools: T1, T2. The tools have been defined and stored in the Tool Library file that will receive the OptiPath record references. The demonstration shows how to link cutting tools in the Tool Library fi

86、le with OptiPath records in an OptiPath Library file</p><p>  See also: Session 29- Optimize Feed Rates via OptiPath Tool List Method</p><p>  Session Steps:</p><p>  Optimize an In

87、ch Tool Path</p><p>  Cutters used by sample tool path "op_mold.mcd":</p><p>  1. In VERICUT, open the sample "op_mold.usr" User file</p><p>  File > Open<

88、/p><p>  Shortcut=CGTECH_SAMPLES</p><p>  File Name=op_mold.usr, Open </p><p>  If prompted, respond as follows: Reset cut model? Reset / Save changes? No</p><p>  2.

89、 Use OptiPath Control to reference the "optipath.olb" OptiPath Library file, and indicate cutting H13 tool steel on the 3-axis mill machine</p><p>  OptiPath > Control: Settings tab</p>&

90、lt;p>  OptiPath Library, Browse</p><p>  Shortcut=Working Directory</p><p>  File name=optipath.olb, Open, (If "optipath.olb" is not available use CGTech sample "op_mold.olb&qu

91、ot;)</p><p>  Material= H13 tool Steel</p><p>  Machine=3 ax mill</p><p><b>  OK </b></p><p>  3. Use the Tool Manager to link OptiPath records to cutting t

92、ools used by the tool path file, then save a new "optipath.tls" Tool Library file</p><p>  Update Tool 1 OptiPath properties:</p><p>  Setup > Tool Manager</p><p>  In

93、the tool list, select: 1 - .625D 1.50H FEM</p><p>  Click in the field under OP Description to highlight the record</p><p>  Click again to display the pull down list, select .625D 1.50H FE

94、M, Carbide (4) </p><p>  Note:  The window may require stretching to see all information.</p><p>  Update Tool 2 OptiPath properties:</p><p>  In the tool list, select: 2

95、- .750D 1.50H BEM</p><p>  Click in the field under OP Description to highlight the record</p><p>  Click again to display the pull down list, select .750D 1.50H BEM, Carbide (4) </p><

96、;p>  4. Save a new "optipath.tls" Tool Library file</p><p>  Tool Manager window: File > Save As</p><p>  Shortcut=Working Directory</p><p>  File Name=optipath.tls,

97、 Save</p><p>  File >Close, Yes </p><p>  5. Use OptiPath Control to create an optimized tool path named "op_mold.opti"</p><p>  OptiPath >Control</p><p&g

98、t;  Optimized File=*.opti (OK as is. The "*" wildcard will be replaced with the "op_mold" tool path base file name to create an optimized tool path named "op_mold.opti".)</p><p>

99、;  OptiPath Mode =On</p><p>  OK (Note the red "OptiPath" light on the VERICUT main window indicates optimization is on) </p><p>  6. Open the Status window and configure to also show

100、optimized feed rates and cutting time, as well as the "Tool Use Graph"</p><p>  Info > Status</p><p><b>  Configure</b></p><p>  Ensure OP Time and OP Feedr

101、ate are selected</p><p>  Select Tool Use, Time interval=60 (minutes)</p><p><b>  OK </b></p><p>  During processing the Feedrate field displays the programmed feed

102、 rates while the OP Feedrate field displays the optimized feed rates.</p><p>  7. Cut the model</p><p>  Play to End  </p><p>  8. Open the Log file window and review the

103、"OptiPath Summary", then close the Log file window</p><p>  Info > VERICUT Log</p><p>  Scroll to bottom of file and search for the "OptiPath Summary" header. </p>

104、<p>  Sample Log File OptiPath Summary:</p><p>  Close the Log file window </p><p>  Session 29- Optimize Feed Rates via OptiPath Tool List Method</p><p>  This session shows h

105、ow to configure VERICUT for optimizing a G-Code tool path file by building a Tool  List to reference OptiPath records stored in a previously defined OptiPath Library file. The sample G-Code tool path file to be opti

106、mized uses 2 cutting tools: T1, T2. The tools have been defined and stored in a Tool Library file. The demonstration shows how to link cutting tools in the tool path file with OptiPath records in an OptiPath Library file

107、, as well as optimize the tool path file moti</p><p>  See also: Session 28- Optimize Feed Rates via Tool Library Method</p><p>  Session Steps:</p><p>  Optimize an Inch Tool Path&

108、lt;/p><p>  Cutters used by sample tool path "op_mold.mcd":</p><p>  1. In VERICUT, open the sample "op_mold.usr" User file</p><p>  File > Open</p><p

109、>  Shortcut=CGTECH_SAMPLES</p><p>  File Name=op_mold.usr, Open </p><p>  If prompted, respond as follows: Reset cut model? Reset / Save changes? No</p><p>  2. Use OptiPath

110、 Control to reference the "optipath.olb" OptiPath Library file, and indicate cutting H13 tool steel on the 3-axis mill machine</p><p>  OptiPath > Control: Settings tab</p><p>  Opt

111、iPath Library, Browse</p><p>  Shortcut=Working Directory</p><p>  File name=optipath.olb, Open (If "optipath.olb" is not available use CGTech sample "op_mold.olb")</p>

112、<p>  Material=H13 tool Steel</p><p>  Machine=3 ax Mill</p><p><b>  OK </b></p><p>  3. Use a tool list to link OptiPath records to cutting tools used by the too

113、l path file</p><p>  A tool list can be generated by scanning the tool path file. By default, the tool change events in the list represent the pocket numbers of cutting tools used by the tool path file. Thes

114、e events can also be linked to OptiPath records for tool path optimization, as described by the next step.</p><p>  Setup > Toolpath</p><p>  Tool Change By=List</p><p>  Use Too

115、l list</p><p>  Ensure "Prompt for Optipath settings while building" is cleared (NOT selected)</p><p>  Build Tool List - scans the tool path and generates the tool list</

116、p><p>  In the fields under OptiPath Setting:</p><p>  - for event #1 </p><p>  left-click to select: .625D 1.5H FEM, Carbide (4)</p><p>  - for event #2 </p>

117、<p>  left-click to select: .750D 1.5H BEM, Carbide (4)</p><p>  Tool Change List window: OK</p><p>  Toolpath window: OK </p><p>  4. Use OptiPath Control to create an op

118、timized tool path named "op_mold.opti"</p><p>  OptiPath >Control</p><p>  Optimized File=*.opti (OK as is. The "*" wildcard will be replaced with the "op_mold"

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