互换性与技术测量圆柱结合复习题Review of interchangeability and measurement of cylinders.docx

1、互换性与技术测量圆柱结合复习题Review of interchangeability and measurement of cylinders互换性与技术测量圆柱结合复习题（Review of interchangeability and measurement of cylinders）Interchangeability of cylindrical exercisesI. judgment questions.1 tolerances can be said to allow maximum deviation of part size. ()2, the basic size of

2、different parts, as long as their tolerances the same value, it can be explained that they require the same accuracy. ()3, the national standard stipulates that the hole refers only to the cylindrical inner surface. ()4, drawing marking 200 -0.021mm diameter shaft, processing the basic dimensions of

3、 the more accurate near. ()5, the basic deviation of the hole is the lower deviation, the basic deviation of the axis, that is, the upper deviation. ()6. The size of a hole is 20-0.046 -0.067, and the actual size is 19.962mm. This hole can be judged to be qualified. ()7, no injection tolerance size,

4、 that is no tolerance requirements for the size. ()8, the basic deviation determines the location of the tolerance zone. ()9. The allowable variation of the geometric parameters of a part is called geometric tolerance. ()10 the basic deviation refers to the basic size of the same combination of the

5、hole and the axis of the relationship between the tolerance zone. ()11, drawing marking phi 30+0.033 0mm hole, can determine the hole hole Berezovsky benchmark system. ()12, the transition fit may have gaps or may be excessive, so the transition fit may be a gap fit, or it may be interference fit. (

6、)13, the smaller the value of the tolerance, the higher the tolerance grade of the holes and shafts that cooperate with each other. ()14, the hole and shaft fit with a 40H9/n9, can be judged to be a transition fit. ()15, H7/g6 is more important than H7/s6. ()16, the relative position of the hole and

7、 shaft tolerance zones reflects the degree of ease of processing. ()17, the minimum clearance of zero coordination and minimum interference equal zero coordination, the two are essentially the same. ()18, the base shaft system matching hole, the lower deviation must be less than zero. ()19, from the

8、 manufacturing point of view, the hole system is characterized by the first hole processing, the basic shaft system is characterized by the first processing shaft. ()20, the work temperature is higher than the shaft temperature, the design should meet the need to increase the amount of interference.

9、 ()21, the basic deviation from a to h, and the base hole gap fit, in which h coordination most loose. ()22, the relative movement should be used in conjunction with the gap, no relative movement of the coordination, are selected interference fit. ()23, the size of the tolerance is equal to the sum

10、of the tolerance of the hole shaft. ()24, the assembly accuracy of high coordination, if for the transition fit, its value should be reduced; if the gap fit, its value should be increased. ()25, the basic deviation of the axis, from a to h for the upper deviation of ES, and is negative or zero. ()26

11、. The basic deviation is used to determine the upper or lower deviation of the tolerance band relative to the zero line position.()27, the higher the machining accuracy of holes and shafts, the higher the matching accuracy. ()28. The actual size of the part is the true size of the part. ()29, in ord

12、er to meet the requirements of the use of circumstances, we should try to use a lower tolerance level of tolerance. ()30, clearance fit, hole tolerance zone must be above the zero line, the axis must be in the line of tolerance below the zero line. ()31, the size deviation can be positive or negativ

13、e, or 0. ()32, interference fit is a can not move each other, it is not easy to disassembly and coordination. ()Two, multiple-choice questions.1, the following discussion is correct _.A. because of the mass production, so only part interchangeability, because of the interchangeability of production

14、before making tolerance systemB. parts with interchangeability, their geometric parameters should be absolutely accurateThe assembly of the C. is called interchangeability when it is assembled without having to be selectedD. a part is adjusted and then assembled, qualified, also known as interchange

15、able productionE. is not completely interchangeable, will not reduce the use performance, and the economic benefit is better2, the tolerance level of the right is _.A. tolerance level is high, then tolerance bandwidthB. should use low tolerance grade as much as possible under the premise of meeting

16、the application requirementsThe degree of tolerance of C. affects the size of tolerance zone and determines the accuracy of fitD. holes and shafts fit together at the same levelE. standard, standard tolerance is divided into 18 grades3, with each of the following groups, with the same nature with _.A., Phi 30H7/f6 and phi 30H8/p7, B., Phi 30P8/h7 and phi 30H8/p7, C., Phi 30M8/h7 a