SU1647216A1 - Method for making measurement gages - Google Patents

Abstract

The invention relates to the field of mechanical engineering, instrument-making and tool manufacturing, and to methods for the manufacture of means for controlling the limiting dimensions of smooth and profiled surfaces. The purpose of the invention is to reduce the labor intensity. This is achieved in that the method consisting in the manufacture of handles and insert bases, the activation of insert bases, the application of a working layer of wear-resistant material on the insert base, the grinding and finishing of the working surface, the connection of inserts with a pen and the marking of calibers, is applied by plasma spraying a thickness of not less than a (µm), determined by the formula 1 + 0.5iT1j-R, where K is a coefficient that takes into account the irregularity of wear of the gauge over the entire working surface,, 1 for wearing gauges, for sewing gauges; H - tolerance for the manufacture of caliber; R is the tolerance of the position of the sprayed and base surfaces in the radial expression; GG-tolerance on the form. . yo

Description

The invention relates to the field of mechanical engineering, instrument-making and tool manufacturing, in particular to the manufacture of means for controlling the limiting dimensions of smooth and profiled surfaces.

The aim of the invention is to reduce the complexity of manufacturing.

The goal is achieved by the fact that in the manufacturing method, which consists in the manufacture of handles and bases of inserts, the activation of bases of inserts, the application of a working layer of wear-resistant material on the bases of inserts, the grinding and finishing of the working surface of the inserts, the connection of inserts with handles and the marking of calibers, the working layer is applied by plasma spraying of a thickness not less than a (m), determined by the formula

-a KH1 + 0.5iT1 + R1, (1)

where K - coefficient taking into account the uneven wear of the gauge over the entire working surface;

H1-admission to manufacture;

IT is a form tolerance;

R is the tolerance of the position of the sprayed and base surfaces in the radial expression.

The basis of this method of manufacturing measuring calibers is the plasma spraying technology of the working layer of calibers, which makes it possible to reduce the labor intensity of making calibers from 1-2 standard hours to 10 minutes, and the manufacturing cycle from 48-80 hours to 8 hours.

It is known that the passage part of the gauge during operation enters the controlled hole of the part (for example, for sample 4 vj S

ck

ki) and is in contact with the surface of the controlled size of each part. As a result, wear of the gauge portion of the gauge occurs, and the number of measurements, for which complete gauge gauge wear occurs, determines the durability of the gauge. In the process of wear, the working surface of the gauge changes both in size (to the lower limit size taking into account its wear) and in shape (ovality, cut, waviness, taper, barrel, saddle, etc.).

To preserve the wear resistance of the extremely worn bore gauge, an additional thickness of the working layer is entered, taken into account by a factor K, taken equal to 10% of the tolerance for making the caliber, and expressed as ELF value, 1Н1 (H, Hs, Hi. Hp), (2)

where H1 is the tolerance for the manufacture of a caliber that takes a specific value of H, Hs, Hi, Hp depending on the type of caliber being developed.

It is known that the empty part of the gauge during operation does not enter the controlled hole of the part (for example, for a plug) and does not come into contact with the surface of the part being controlled. In this case, no wear of the non-through part of the gauge occurs and the additional thickness of the working layer is not tubed. Therefore, the K coefficient for the non-through plug (non-threading gauges) is assumed to be zero and the expression (2) takes the value

 , (3)

where H1 is the tolerance for the manufacture of gauge as a generalized designation of the tolerance for various types of gauges;

H - tolerance for the manufacture of calibers for the hole;

Hs is the tolerance for making gauges with spherical measuring surfaces for the hole;

Hi - tolerance for the manufacture of gauges for the shaft;

Hp is the tolerance for the manufacture of a reference gauge for the bracket;

IT1 is the tolerance for the form of a caliber as a generalized designation, which, depending on the type of caliber, can take the value of the tolerance for the form of a caliber according to known tables.

The manufacture of gauges by the method of sputtering with a working layer of ceramic or hard alloy on a stainless steel or brass base made it possible to obtain gauges for durability equivalent to ceramic or carbide, and for anti-magnetic properties equivalent to stainless steel or brass.

When insulating parts made of ceramic materials are inspected with calibers made of solid 5 alloy, metal coatings on controlled surfaces are formed due to wear of the gauge, which reduces the quality of the insulating properties of the parts.

When inspecting the same insulator parts with calibers made in this method with a sprayed working layer made of ceramics, nethers from a homogeneous material (ceramics) are possible on the controlled surfaces, which does not change the 5 insulating properties of the parts and thus reduces their quality.

Claims (1)

Claims The method of manufacture of measuring calibers, including the manufacture of handles 0 and the bases of the inserts, the activation of the bases of the inserts, the application of the working layer of wear-resistant material on the bases of the inserts, the grinding and finishing of the working surface, the connection of the inserts with handles and 5 marking calibers, characterized in that in order to reduce the labor intensity of manufacturing, the working layer is applied by plasma spraying with a thickness of not less than a (µm), defined by the formula 0a KH1 + 0.5iT + R1, where K - coefficient taking into account the uneven wear of the gauge over the entire working surface; , 1 for wearing gauges; 45 for non-wearing gauges; H - manufacturing tolerance; IT is the tolerance for the form, R is the tolerance for the location of the sprayed and reference surfaces in the radius of expression.