Method for detecting parallelism of machine body

Abstract

The invention discloses a method for detecting the parallelism of a machine body. A parallelism gauge is applied. The method for detecting the parallelism of the machine body comprises the following steps that the machine body is arranged in an inclined mode so that a midbody installation plane can be made to be in a horizontal state; a leveling ruler is arranged on the midmody installation plane b and moves transversely and longitudinally; the numerical value of the distance L1 from the midbody installation plane b to the top end of a first bearing hole and the numerical value of the distance L2 from the midbody installation plane b to the top end of a second bearing hole are measured and obtained; the numerical value of the inner diameter D1 of the first bearing hole and the numerical value of the inner diameter D2 of the second bearing hole are measured and obtained; the numerical value of the width d of the midmody installation plane b of the fuselage is measured and obtained; the numerical value of the distance B between the outer sides of the two ends of the first bearing hole and the numerical value of the distance B between the outer sides of the two ends of the second bearing hole are measured and obtained; the parallelism e between the midbody installation plane of the machine body and an axis of each bearing hole is equal to [L1+D1 / 2-(L2+D2 / 2)]*d / B, and the measured values are brought to the calculation formula so that the numerical value of the parallelism can be worked out. Compared with the prior art, the method for detecting the parallelism of the fuselage can rapidly measure the parallelism between the midbody installation plane of the fuselage and the axis of each bearing hole so that the numerical value of the parallelism can be worked out.

Description

technical field [0001] The invention relates to the technical field of measurement methods for shape and position tolerances of parts, in particular to a detection method for the parallelism of the installation plane of the middle body of a compressor fuselage to the axis of a bearing hole. Background technique [0002] The fuselage is one of the important parts of the piston compressor, which plays a role in supporting various moving parts and ensuring their positional relationship. Therefore, the manufacturing accuracy of the fuselage directly affects the installed quality of the compressor. A fuselage of a compressor; the top of the fuselage is provided with two slanted middle body installation planes, and a slideway hole is arranged perpendicular to the middle body installation plane; the first bearing hole and the second bearing hole on the fuselage Bearing holes; there are dimensional tolerances and geometric tolerances associated between these planes and holes; the p...

AI Technical Summary

Problems solved by technology

A fuselage of a compressor; the top of the fuselage is provided with two slanted middle body installation planes, and a slideway hole is arranged perpendicular to the middle body installation plane; the first bearing hole and the second bearing hole on the fuselage Bearing holes; there are dimensional tolerances and geometric tolerances associated between these planes and holes; the parallelism of the installation plane of the middle body to the axis of the bearing hole is one of the important indicators for detecting the geometric tolerance of the fuselage. Due to the large size of the fuselage , the structure is complex, and the dimensional tolerance can be measured; the shape and position tolerance is difficult to measure with conventional inspection tools, and a special three-coordinate measuring instrument is required to measure, but the special three-coordinate measuring instrument is expensive and generally not used; for a long time, the shape The accuracy of the position tolerance is guaranteed by the accuracy of the equipment, which is not conducive to the quality control of the product in the manufacturing process. In the existing inspection methods for the parallelism of the fuselage, there is no inspection tool and inspection method that can be applied to the above-mentioned machine. As a matter of fact, many enterprises and predecessors have conducted a large number of experiments to solve the measurement method and means of the parallelism between the installation plane of the middle body of the fuselage and the axis of the bearing hole, and have not obtained a suitable technological means and method so far.

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