SU1283014A1 - Method of assembling cylindrical parts - Google Patents

Abstract

The invention relates to mechanical engineering and instrument making and can be used to improve the accuracy of assembled products by reducing the skew of the axes of the parts being screwed. The invention allows the assembly of cylindrical parts, for example coaxially fixed by threading shafts, by measuring the assembled parts, marking them and selecting the compensator part, followed by determining the point of the greatest and least deviations from the perpendicularity of the ends, measuring the angle between the diameter of the specified points and the diameter of the location of the beginning of the thread, after which the compensator part is adjusted to the heights; from the condition of the diametral arrangement of the largest or the smallest deviations of the assembled parts. 3 il. i (L

Description

The invention relates to mechanical engineering and instrument-making and can be applied mainly in the processes of serial and mass assembly of cylindrical parts along coaxially arranged threaded, centering cylindrical surfaces until the parts stop at the ends, the quality indicator of which is the magnitude of the radial beats of their interface. checked against extreme sections of the resulting assembly as it rotates. Radial beating is usually minimized.

The purpose of the invention is to improve the assembly accuracy by providing a guaranteed minimization of the amount of skew of the axes of the screwed parts, determined by the presence of the radial beat of the place of their joint.

The goal is achieved by measuring the size of the face beat and its phase angle relative to the beginning of the thread in parts, parts are numbered, matched with pairs of the same amount of face beats, an intermediate ring compensator with a smooth one is installed on the threaded surface of one of the parts inner surface and parallel ends, the height h (mm) of which is calculated by the formula

h t

where t is the thread pitch, mm;

n is the number of threads of the thread (depends on the preselected, based on design considerations, 40 of the height of the ring-compensator, and is equal to the whole from the division, and .g / t, T.e,

P

(whole

Cp, and - phase angles of the location of the points of the maxima, minima of the end beats of the screwed parts relative to the total beginning of the thread turns, degrees; and screwed with the second part of the pair until it stops in the intermediate ring of the intermediate ring. As a result, in a fully screwed joint, the points of the maximum (minimum) beating are diametrically opposite to each other, which ensures mutual fO

5 20

, -thirty

25

35

 , 40

45

50 55 Immense beating of face beats and minimization of the amount of skew of the axes of the screwed parts, and, consequently, the value of the radial beats.

FIG. Figure 1 shows the assembly scheme by screwing and the formation pattern of the radial beating 2B of the compound, arising as a result of the presence of end beats Tj and T parts; Fig. 2 is the same, provided that there is no radial beating of the assembly (if T, 1 and the end beats are in opposite phase with respect to each other); in fig. 3 is a diagram of measuring the phase angles cf and the location of the end beats T, and Tj with respect to the total beginning of the threading of the parts necessary to realize the conditions shown in FIG. 2

The method is carried out as follows.

The cylindrical parts 1 and 2, which arrived at the assembly, certify the size of the frontal beats and the phase angle of the maximum (minimum) of the frontal beats relative to the start of the threads of the part. Face beating is determined according to a known control scheme. At the same time mark the position of the point of its maximum (minimum).

The start of threading is determined, for example, by screwing a measured part with a counter-reference standard, in which the starting point of thread start is set and fixed by marking. The starting point of the thread start of the pattern, in turn, must be the beginning of a circular degree scale located on the outer cylindrical surface of the pattern at its junction with the measured part. In a screwed pair, the part — the standard of the point of swing of the thread's approach — coincides, which makes it possible to determine the phase angle of the point of maximum (minimum) of the face-beat in the part by its mark using the degree scale. Each certified part 1 and 2 is labeled with a serial number and stored. After this, parts 1 and 2 are completed in pairs with possibly the same amount of face beats and the resulting sets are fixed (memorized) in one way or another.

According to the formula (1), depending on the measured phase angles,

The height of the intermediate ring-compensator with a smooth inner surface and parallel ends. The parts 1 and 2 pairs are taken, an external ring of one of the parts of the pair is fitted to the ring-compensator 3, and this part is screwed with the second part to the top of the compensator ring

The resulting compounds are monitored for the presence of radial beats 26 in the place of loading.

Claims (1)

Invention Formula The method of assembly of cylindrical parts, for example coaxially fixed through the thread of the shafts, which consists in measuring the assembled parts, marking them and selecting the compensator part, characterized in that, in order to ensure the alignment of the assembled parts, the points of the largest or smallest deviations from the perpendicularity of the ends are determined and the angle between the diameter of the specified points is measured and the diameter of the location of the beginning of the thread, after which the detail of the compensator is adjusted in height from the condition of the diametrical arrangement of the indicated most or least deviations of the assembled parts. 5L Accurately naib, gortsebogo beaten child. 2 The total beginning of the thread parts. (Puz.3