Northwestern Polytechnical University "Machine Manufacturing Equipment and Design" computer test online test
Total score of test paper: 100 Score: 100
1. Multiple-choice questions (a total of 10 test questions, a total of 20 points)
1. The coupling form of gears and drive shafts in the transmission system is ().
A. Empty sleeve
B. Slip
C. Fixed
2. What are the methods of forming occurrence lines on the machine tool? ()
A. Locus method
B. Tangent method
C. Forming method
D. Fan Cheng method
3. Which of the following methods are available for CNC machining programming? ()
A. Manual programming
B. Computer numerical control language programming
C. Graphic programming
4. According to the motion track, the CNC machine tools can be divided into: ()
A. Point control CNC machine tools
B. Direct control CNC machine tools
C. Contour control CNC machine tools
5. In which directions can the radial drilling machine achieve movement? ()
A. The spindle box can be adjusted laterally along the rocker rail
B. The rocker can be adjusted up and down along the outer column
C. The rocker and outer column can be rotated to different positions around the inner column
D. Spindle rotation and axial feed movement
6. Which of the following motions should the gear shaping machine have when processing the diameter of a straight tooth cylinder on a gear shaping machine? ()
A. Main motion
B. Spread motion
C. Circular feed motion
D. Let the knife
7. CM1107 type longitudinal-cut single-axis automatic lathe, the drum on the distribution shaft is used for ()
A. Axial feed of the spindle of the three-axis drilling and hinge attachment
B. Spindle rotation and braking
C. Clamping and loosening of the bar stock
8. Machine tools that can process holes are ().
A. Milling
B. Drilling
C. Turning
D. Boring
E. Broaching machine
9. Each independent movement has the following elements: ()
A. Track
B. Speed
C. Direction
D. Stroke
E. Position
10. When the universal cylindrical grinder grinds the outer circle by the longitudinal grinding method, which of the following movements is required? ()
A. Main motion
B. Circular feed motion
C. Worktable longitudinal feed motion
D. Grinding wheel lateral feed
2. Judgment questions (40 test questions, 80 points in total)
1. For CA6140 ordinary lathes, when changing from inch thread processing to diameter thread processing, adjust the hanging wheel mechanism in the machine tool feed system.
A. Error
B. Correct
2. Gear shaping machined gears, which is based on the meshing principle of the gear rack.
A. Error
B. Correct
3. In the CA6140 lathe feed drive system, the transmission path can be either a light bar or a screw to drive the slide box. The interlocking mechanism ensures that the two transmission lines are connected at the same time.
A. Error
B. Correct
4. The meaning of general machine tool code C is gear processing machine tool.
A. Error
B. Correct
5. On the CA6140 lathe, you can use a large-lead screw drive chain to turn more precise non-standard threads.
A. Error
B. Correct
6. There is a reverse mechanism in the feed box of the CA6140 lathe to realize the processing of left and right threads.
A. Error
B. Correct
7. When hobbing a helical cylindrical gear, when the tool holder moves along the workpiece axis helical lead T, the workpiece should be additionally rotated a full turn, whether it is more or less rotation mainly depends on the spiral of the workpiece Direction and turning of the workpiece.
A. Error
B. Correct
8. There is a one-way overrunning clutch in the slide box of the CA6140 lathe for fast feed.
A. Error
B. Correct
9. The main parameter of the broaching machine is the pulling force.
A. Error
B. Correct
10. The transmission schematic diagram uses simple symbols to indicate the structure of each transmission part in the transmission chain.
A. Error
B. Correct
11. The CM1107 longitudinal-cutting single-axis automatic lathe is composed of a base, a bed, a feeding device, a spindle box, a balance tool holder, a center frame, an upper tool holder, a three-axis drilling and hinge attachment, a distribution shaft and other components.
A. Error
B. Correct
12. The main parameter of an ordinary lathe is the maximum turning diameter on the bed.
A. Error
B. Correct
13. M1432A universal cylindrical grinder grinding wheel spindle adopts short three-watt dynamic pressure sliding bearing sliding bearing. If the bearing clearance is too large, spherical screws should be adjusted.
A. Error
B. Correct
14. Gear grinding machine grinding gear, it is based on the meshing principle of a pair of helical gears meshing.
A. Error
B. Correct
15. The various movements completed by the machine tool during machining can be divided into surface forming movements and auxiliary movements according to their functions.
A. Error
B. Correct
16. In the transmission system of the machine tool, the multi-plate friction clutch should be used in the transmission chain with low speed and frequent opening and closing.
A. Error
B. Correct
17. Differential adjustment method for processing helical cylindrical gears. Advantages: Separating teeth and additional hanging wheels are adjusted separately, and it is easy to select and match.
A. Error
B. Correct
18. When the hobbing machine uses the differential method to process the helical cylindrical gear, an error in the transmission ratio of the additional motion will cause an error in the helical angle β of the processed gear. If there is an error in the installation angle δ of the hob spindle, it will not cause processing. The helical angle β of the gear produces an error.
A. Error
B. Correct
19. Rotary and turret lathes are developed on the basis of horizontal lathes.
A. Error
B. Correct
20. The gears are processed by the extension method using the gear meshing principle.
A. Error
B. Correct
21. In order to speed up the rounding process and improve the roundness of the workpiece, the center of the workpiece must be lower than the center line of the grinding wheel and the guide wheel.
A. Error
B. Correct
22. There are three tooth clutches in the CA6140 lathe feed drive system, which can be changed to friction plate clutches.
A. Error
B. Correct
23. Ordinary surface grinders can be divided into three categories.
A. Error
B. Correct
24. The main parameter of the drilling machine is the maximum drilling diameter.
A. Error
B. Correct
25. There are two grinding methods for centerless cylindrical grinding machines: through grinding (horizontal grinding) and plunge grinding (longitudinal grinding).
A. Error
B. Correct
26. The biggest difference in structure between the turret lathe and the horizontal lathe is the tailstock and screw.
A. Error
B. Correct
27. Forming movements can be divided into main movements and feed movements according to their role in cutting.
A. Error
B. Correct
28. The CM1107 single-axis longitudinal slitting automatic lathe can process a maximum bar diameter of 7, and the distribution shaft completes one working cycle with one rotation.
A. Error
B. Correct
29. The gears are processed by the spreading method and the gear hobbing machine is based on the meshing principle of a pair of spur gears.
A. Error
B. Correct
30. The transmission system diagram specifically shows the transmission relationship between the power source and the actuator or between the actuator and the actuator.
A. Error
B. Correct
31. The machining of helical gears by differential adjustment method, disadvantages: due to its manufacturing accuracy and inevitable clearance, transmission errors will occur, affecting the processing accuracy.
A. Error
B. Correct
32. When the CA6140 ordinary lathe is changed from modular thread processing to inch thread processing, there is no need to adjust the hanging wheel and the metric conversion mechanism in the machine tool feed system.
A. Error
B. Correct
33. Hobbing machined gears, the turning of the workpiece depends on the turning of the tool and the direction of the helix of the tool.
A. Error
B. Correct
34. The significant difference between a machining center machine tool and an ordinary CNC machine tool is that it does not have an automatic tool change function.
A. Error
B. Correct
35. When performing general turning on CA6140 ordinary lathe, only the right-hand thread transmission route is used.
A. Error
B. Correct
36. The milling machine cannot process surfaces such as machining planes, step surfaces, grooves, tooth-dividing parts, screw-suspended surfaces, T-slots, dovetail grooves, milling teeth, milling spiral grooves, milling of internal and external curved keyways, etc.
A. Error
B. Correct
37. The Ⅰ axis of the CA6140 spindle box uses unloading pulleys.
A. Error
B. Correct
38. The meaning of general machine tool code S is thread processing machine tool.
A. Error
B. Correct
39. According to the analysis of the transmission error, when the transmission chain is a speed reduction transmission, the transmission error increases during the transmission process.
A. Error
B. Correct
40. In the process of CM1107 slitting single-axis automatic lathe, the main shaft cannot be shifted or braked.
A. Error
B. Correct
