1 .. The plane inclined to all three projection planes is ().

A. Front plane B. Vertical plane C. Side plane D. General position plane

2 .. In order to facilitate the manufacture of the tool itself, the tool material should have good ().

A. machinability B. heat treatment C. process performance D. plasticity

3. The main deflection angle of cylindrical turning tool increases (Kre > Kr) and the auxiliary deflection angle decreases (k ′ re < k ′ r), indicating the center line of turning tool ().

A. Left deflection B. Right deflection C. Left or right deflection D. Vertical

4. The higher the () of the tool material, the longer the tool life.

A. hardness and wear resistance B. hardness strength C. high temperature hardness and wear resistance D. plastic toughness

5. When sharpening the knife surface and blade, please ensure that ().

A. Smaller surface roughness B. Higher surface roughness

C. Medium surface roughness D. Arbitrary surface roughness

6. When grinding the pin, () is the feed movement.

A. grinding wheel rotation B. workpiece movement C. workpiece high-speed rotation

D low-speed rotation and linear motion (or grinding head motion) of the workpiece

7. Drilling machine furniture lathe fixture milling machine fixture type according to () classification.

A. Function of fixture B. Universality C. Processing type D. Power supply used

8 .. The main basis for calculating the clamping force is the size of ().

A. cutting force B. cutting speed C. cutting depth D. feed rate

9 .. In the process of fixture assembly, the independent component that is not disassembled is ().

A. Clamping parts B. Fasteners C. Assembly D. Locator

10 ... The viscosity of oil is measured by viscosity. If the viscosity is large, then ()

Oil A is not easy to flow, and oil B has various properties. C indicates good oil fluidity and D indicates low pressure bearing capacity.

1 1. The three-position valve used for differential connection is ().

.

A.B.

C D

12. The gear pump is ().

A. variable displacement pump B. constant displacement pump C. bidirectional pump D. double-acting variable displacement pump

13. The drawing method with high accuracy for drawing archimedean spiral is ().

A. point by point B. arc C. subsection D. arc and subsection

14. When the bit diameter is greater than ACMM, the handle is generally ().

A. straight handle B. mo type vertebral stalk C. straight handle tapered stalks all have D. multi-dimensional vertebral stalks

15. Holes with a diameter of () mm or less.

1

16. When drilling fine holes, drill the bottom hole first, leaving a machining allowance of about () mm, and then carry out fine expansion.

A .0.A~0。 C B.0.C~05 C .0.5~A D. A~A.5

17. Before starting the centrifugal pump, it must be filled with liquid and closed () to prevent backflow.

A. water inlet B. water outlet C. water inlet and water outlet D. overflow port

18. Multi-stage piston air compressor generally needs to be realized in ().

A. cylinder and inlet/outlet B. interstage and inlet/outlet C. cylinder interstage and outlet D. cylinder interstage and inlet

19 ordinary lathe tool rest is driven by () when moving vertically and horizontally.

A. polished rod B. screw C. polished rod and screw D. polished rod or screw

20. Ordinary lathe bearings have a great influence on the rotary accuracy of the spindle. In order to ensure the machining accuracy of the machine tool, the spindle bearing should run under the condition of ().

A. larger clearance B. smaller clearance C. no clearance or a little interference D. larger margin

2 1.CA6 1D0 The main function of the slide box safety clutch of the common lathe is () overload protection.

A. motor B. threading C. electric feed D. threading or electric feed

22. When the feed box of Z5B5 drilling machine moves up and down, () moves with it.

A. spindle B. spindle sleeve C. spindle and spindle sleeve D. workbench

23. The front bearing of the main shaft of X6ACB milling machine adopts tapered roller bearing with accuracy of ().

University of California, University of California, University of California, University of California.

24. The indication error of the inner diameter dial gauge is large, which is generally ().

A. plus or minus 0. 15b. Plus or minus 0.0 15 C plus or minus 0.1d. Plus or minus 0.02.

25. The reading of the micrometer drum of the autocollimator is that the working distance of each measurement is ().

A. 1m B.0 ~ 5m C.0 ~ 9m D.0 ~ A0。

26. The optical straightener measures the numerical reading of the micro drum, and each grid is ().

a . 0.0 1um b . 0. 1um c . 0.005/ 1000d . 0.05/ 1000

27. Theodolite is characterized by multiple axes and a horizontal axis, which can make the aiming telescope rotate in the horizontal direction.

A.90 degrees B. 180 degrees C.360 degrees D. Large angle

28. Due to negligence in measurement or sudden changes in environmental conditions, some large errors are called () errors.

A. System B. Random C. Neglect D. Reading

29 due to the instrument design, manufacture or assembly adjustment is not accurate caused by the error is called () error.

A. system B. random C. measuring instrument D. reading

30. When the scraper is quenched, the length of the scraper head is about (), and it is heated to 780℃ ~ 800℃ in the fire.

A.25㎜ B.500㎜ C.50㎜ D.70㎜

3 1. Clean the casting quality of babbitt alloy on the bearing bush ().

A. it has little impact. B. influence has nothing to do with big C. influence is generally D.

32. Compared with the double torch-shaped guide rail, the double triangle guide rail has the disadvantages of inconvenient processing and inspection ().

A. poor guidance B. unable to automatically compensate for wear C. high friction coefficient D. low friction coefficient

33. The decompression circuit of hydraulic system ().

A. It is achieved by reducing the oil supply pressure of the hydraulic pump. B. it is realized by an overflow valve.

C. it can change the motion of the actuator. D it can make a branch obtain lower and more stable pressure than the main system.

34. Throttle speed control circuit ().

It is realized by a quantitative pump and a speed regulating valve. B, stable and efficient.

C. the motion stability is not as good as the throttle speed regulation D. the speed rigidity is poor.

35. In the four-cylinder diesel engine and gasoline engine, there is a cylinder for each revolution of the crankshaft ().

A.half a week B.one week C. 1.5 weeks D.2 weeks

36. In the Samsung four-wire power supply circuit, the phase voltage is BB0V, and the voltage between live wires is ().

a . 220 b . 3 1 1v c . 380d . 1 1v

37 when grinding the pin, it is easy to deform the process system, which affects the machining accuracy because of the large () when grinding the pin.

A. pin grinding force B. tangential force C. axial force D. radial force

38. When milling a gear with the right angle method, the tooth profile of the milling cutter is the same as that of the gear ().

A. tooth profile B. tooth slot shape C. modulus D. tooth thickness

39. The largest composition of the workshop area should be () unchanged.

A. Production B. Warehouse C. Management D. Channels

40. The original record of workshop production is the first and most direct record made in figures or words through certain forms and requirements.

A. production scheduling B. production activities C. production operation statistics D. workshop work in process

Second, fill in the blanks

4 1. When the taper and inclination are marked on the drawing, the direction of the symbol shall be the oblique direction of the taper inclination. ( )

42. In addition to the rear view, the side of the basic view arranged at a specified position near the main view is the surface of the machine part ().

43. When the datum element of position tolerance is axis, spherical center or central plane, the connection of datum code (symbol) should be connected with the dimension line () of the element.

44. Used to limit the degree of freedom of the workpiece, the support with the function of () is the benchmark support.

45. In the hydraulic system, when several loads are connected in parallel somewhere, the pressure depends on the () of each pressure value to overcome the load.

46. The structural characteristics of the standard group are: there are two types: () and groove.

47. Half-air drill is characterized by grinding the cutting edge and drill core of twist drill into convex and concave shape, and the two outer edges are mainly concave ().

48.X 6 132 milling machine spindle gear box controls the three forks of the sliding gear by the speed change mechanism ().

49. In order to make the spindle of M 1432A grinder work well, the spindle diameter should be kept equal to that of the bearing bush ().

50. The scoring direction of the inner micrometer is the same as that of the outer micrometer ().

5 1. Brazing in tool welding is mainly used to weld various () blades.

52. In order to make the cutting part have certain hardness and toughness, chisel () is needed.

53. Product quality and () quality are two different perceptions.

54. The continuity of the production process includes the continuity of the workplace and the continuity of the working process.

55. Workshop process management includes process analysis and review of product drawings, drawing up () scheme, preparing process regulations and designing and manufacturing process equipment.

Third, the judgment question

56. The keyway depth dimension is usually marked from the axis, mainly considering the convenience of measurement ().

57. The tip of the surface roughness symbol must point from the inside of the material to the surface of the part ().

58. Rough machining blunt standard is to give full play to the cutting performance of the tool, based on the principle of the longest tool life ().

59. There is only one closed loop in the dimension chain ()

60. The power of the motor driving the hydraulic pump is greater than the output power of the hydraulic pump ().

6 1. When marking papers, design benchmark should not be selected as marking benchmark ().

62. Alignment and borrowing are two separate tasks ().

63. The first marking position should rebel in the position where the surface to be machined or the unprocessed surface is not very important ().

64. When marking a larger workpiece, the position with a larger marking area should be selected as the first marking position, because when correcting the workpiece (), the larger surface is more accurate than the smaller surface.

65. Circular arc multi-solution drilling is commonly used to drill pin semi-circular hole ()

66. Compression refrigeration mainly consists of five parts: refrigeration compressor, evaporator, condenser, expansion valve and capillary tube ().

67. Due to the large volume of the lever dial indicator, the contact direction is not adjustable, and it is inconvenient to use ().

68. The assembly work may have a certain impact on the quality of the workpiece ()

69. The lathe assembly, installation of feed box and rear bracket is mainly to ensure that the feed box, slide box and rear bracket are installed with the three-hole coaxiality of the lead screw and the parallelism between the lead screw and the guide rail of the lathe bed ().

70. In the inspection of lathe spindle taper hole axis radial run-out, in order to eliminate the error influence of inspection rod, it needs to be inspected four times, and the maximum value of four inspection results is the radial run-out ().

7 1. The smaller the clearance of rolling bearing, the better ()

72. When scraping the window guide rail, it is usually a long choice to limit the degree of freedom. It is very important to use a static guide as a reference guide ()

73. The single nut clearance elimination mechanism is to exert pressure in the meridian direction of the nut, so that the lead screw keeps unilateral contact with the nut to eliminate the radial clearance ().

74. Repair hardened guide rail often adopts the method of grinding pin ().

75. In order to prevent oil absorption by pump, the oil absorption height of hydraulic pump should be greater than 0.5m ().

76.M 1432A universal cylindrical grinder table automatic reciprocating motion and manual motion system can be connected at the same time to improve work efficiency ().

77. The internal combustion engine is the introduction of liquid or gas cylinder combustion, through gas expansion, so as to directly output mechanical work ().

78. In addition to vertical installation, the installation of the knife switch can also be installed horizontally ().

79. When lifting large objects at night, you should hang a red light ().

80. Boring machine is omnipotent. It can almost complete the whole processing process of workpieces, and is the main equipment for processing large box parts ().

Fourth, the calculation problem. (10)

8 1. For the guide rail with a length of 1600㎜, measure the linear error of the guide rail in the vertical plane with a frame level with an accuracy of 0.02/ 1000 ㎜. The length of the shim of the level gauge is 200㎜, and it is measured in eight sections by absolute reading method, and each reading is+1 and +65438 in turn. (Note: The maximum square error in the figure is 3044 square.)

5. Short answer questions (82-83 questions, 5 points for each question, full score 10. )

82. What problems should be paid attention to when marking deformed workpieces?

83. What is the main guarantee of spindle rotation accuracy of CA61400 lathe? How to adjust?

Answer:1~ 5dcbca6 ~10dcaca

1 1~ 15

2 1~25℃.

3 1~35℃.

4 1. consistency 42. After 43. Alignment 44. Independent positioning 45. minimum value

46. Three-edged and Seven-edged 47. Protrusion 48. Concentration 49. clear away

50. Conversely, 5 1. Cemented carbide 52. Heat treatment 53. work

54. Operator 55. process

56~60 ××√√√ 6 1~65 ×××√×

66~70 ×××√× 7 1~75 ×√×√×

76~80 ×√×√√

8 1. Solution: Linear value of straightness error

△= nil = 3.44×0.02/ 1000 = 0.0 14㎜

82. Answer: When marking abnormal workpieces, the following points should be noted: 1) The dimension benchmark of marking is consistent with the design benchmark.

2) The base plane of workpiece placement is consistent with the design datum plane. 3) Correct alignment and borrowing. 4) Reasonable selection of supporting points.

83. Answer: (1) Front bearing.

(2) Generally, only the front bearing is adjusted. If the front bearing cannot meet the requirements, the rear bearing can be adjusted. intermediate shaft

Whether to adjust.