SU1446535A1 - Method of measuring the wear of cylindrical surface - Google Patents

Abstract

The invention can be used to determine the wear of machine parts and mechanisms. The aim of the invention is to simplify the determination of wear by performing geometrical measurements on a flat surface. A base is applied to the cylindrical surface in the form of a cylindrical recess with an end plane as part of a circle. In the case of a concave cylindrical surface, this part has the form of two segments separated by a section of a cylindrical surface. Wear is determined by changing the geometric dimensions of the base after wear. 2 hp ff, 2 ill. (L

Description

05

sd

00

ate

one

The invention relates to tricolpia and can be used to determine the wear of machine parts and mechanisms.

The purpose of the invention is to simplify the determination of wear by performing geometrical measurements on a flat surface.

Figure 1 shows the implementation of a method for a concave cylindrical surface; Figure 2 is the same for a convex cylindrical surface.

The method is carried out as follows.

A cylindrical recess is applied to the cylindrical surface (Figs. 1 and 2) with an end plane as part of a circle. In the case of a concave cylindrical surface, this part has the appearance of two segments separated by a section of a cylindrical surface (Fig. 1Q), and in the case of a convex 0

surface loi - a view of a circle truncated by chords (figure 2).

 In the particular case, the distance a between the segments of the transition lines of the end plane of the base and the cylindrical surface may be zero (Fig. 1d) or the radius r of the cylindrical surface of the base (Fig. 2d).

The distance a is taken as the geometric size of the base. As a result of the wear of the cylindrical surface, n is the value and the change of the frame a.

By measuring the magnitude of a before (a and after (a-j) wear), the magnitude of the latter for a concave cylindrical surface is found by the formulas

1 8R

i /

op va a ,,; ,

(one

for convex cylindrical surface

 8G (and, -

(2)

Size measurements on a concave surface can be made using prints.

Example. Surface radius R 100 mm, base radius g 7.5 mm, the initial value of the geometric

0

size a 12.5 mm, and the value after wear a 1 6 mm. According to equality (2), surface wear will be 0.15 mm.

Claims (3)

1. The method of measuring the wear of a cylindrical surface, consisting in that the base is applied to the surface in the form of a recess, determines the geometric size of the base before and after wear, and by its change is judged 5 for wear, characterized in that, in order to simplify the determination of wear, the recess is cylindrical with an end plane as a part of a circle and an axis, perpendicular forming the cylindrical surface under study and passing through its axis, the distance between segments of intersection lines. 5 of the end plane of the recess and the cylindrical surface under investigation, the wear 4 of the concave cylindrical surface is determined by the formula d and convex according to the formula L l / 8R (a - a), 5) 40 50 where r - radius of the studied cylindrical surface; , and - the geometric dimensions of the base, respectively, before and after and wear. 2. Method pop. 1, differing by U and by the fact that the base is applied to the concave cylindrical surface so that the distance between the segments of the intersection lines of the end face 45 the plane of the recess and the cylindrical surface was zero. 3. The method of pop. 1, which differs from the fact that the base is applied to the convex cyanindrical surface so that the distance between the segments of the lines of intersection of the end plane of the recess and the cylindrical surface is equal to twice. radius of deepening. 2f A AT FIG. 2