SU397764A1 - METHOD FOR DETERMINING THE VOLUME OF INTERNAL CAVITIES OF NON-CONVERTIBLE DETAILS - Google Patents

Description

one

Methods are known for determining the volume of internal cavities of one-piece parts, for example, when determining the optimum operating parameters of internal combustion engines, and that the outlet opening of the internal cavity is sealed with a cover and, through the loading opening, the internal cavity, for example, the screw bore nozzle is filled with rubber compound under pressure.

The known methods designed to determine the volume of the internal cavities by the method (pressing each rubber cavity with simultaneous volume measurement using an indicator and a graduated scale are unsuitable for accurately determining the configuration volume of internal cavities, in particular, a complex configuration using the elastic model manufactured in the cavity and extracted from it without deformation.

Compared with the known method, the proposed method is characterized in that the rubber mixture filled under pressure in the internal cavity is vulcanized to form its elastic model, which, after being removed from the cavity, determines its volume and configuration using known methods.

This method also differs in that an insert is coated into the expanded part of the cavity, covering a layer of a substance, such as talc, which prevents the rubber from welding to the surface of the insert, which is removed from the cavity before removing the elastic model from it. In addition, this method is characterized in that the rubber mixture is filled under pressure and vulcanized in a cavity of complex configuration with interlayers dividing the model blank into parts and preventing the vulcanization of parts of the blank that after vulcanization are removed through the loading openings in parts.

This method will provide accurate determination of the volume and configuration of internal cavities, reducing the effort to extract the elastic model without deforming it from the cavity of a complex configuration.

FIG. Figure 1 shows the scheme for carrying out the method without the use of an insert for the smooth removal of the rubber model; in fig. 2 - the same with the insert; in fig. 3 shows a scheme for carrying out the method with extraction of a complex rubber model in parts, divided by an antiadhesive layer into parts.

The method is carried out as follows.

The internal cavity of the part / is filled through the opening 2 with rubber mixture, after agglating the outlet opening 3 with the lid 4. The flange 5 with the threaded sleeve 6 is used for filling. The flange is fixed to the part / and the screw 7 is moved along the thread of the sleeve 6, creates pressure rubber compound. Then the part /, filled with rubber mixture, vulcanized known methods M: And. At the end of vulcanization, the cover 4, flange 5 is removed from the part and the elastic model is removed from the protrusion formed by the excess rubber mixture in the threaded sleeve 6. To easily remove the model through insertion of the internal cavity of the part 1, inserts 8 treated with an anti-adhesive agent are inserted into the expanded part such as talcum powder. The inserts are removed after curing before removing the elastic model.

When obtaining a model with an internal cavity having a complex shape with branches, it is divided into several rational cavities by layers 9, for example, from oiled paper, and the rubber mixture is filled through several openings 2 by means of flanges 5 with threaded sleeves 6. After vulcanization, the model is removed from the cavity in parts

Subject invention

Claims (3)

I. A method for determining the volume of internal cavities of integral parts, for example, when determining the optimum operating parameters of internal combustion engines. It is sealed in that the outlet of the inner iolith is sealed with a lid and through the inlet opening the inner cavity with, for example, a charging funnel and a nozzle with a screw pair is filled under pressure with a rubber mixture, characterized in that, in order to ensure an accurate determination of the volume and configuration internal cavities, the rubber mixture filled under pressure in the internal cavity is vulcanized to form its elastic model, according to which, after being removed from the cavity, it is determined by known methods dissolved its volume and configuration. 2. A method according to claim 1, characterized in that, in order to reduce the effort to extract the elastic model, without deforming it, through a narrowing of the internal cavity, a coated insert is inserted into the expanded part of the cavity A layer of material is added to prevent tarpaulin rubber to the surface of the insert, which is removed from the cavity before removing the elastic model from it. 3. The method according to Mon. 1 and 2, characterized in that that, in order to remove the elastic model from the cavity of a complex configuration without deformation, the rubber mixture is filled under pressure, "vulcanized in a cavity of a complex configuration with interlayers separating pre-fabrication of the model into parts and parts of the workpiece that prevent curing, which, after vulcanization, are removed through the feed openings in parts. PeiuHoSag mix