RU61923U1 - BELL - Google Patents

Abstract

The utility model relates to a bell business and can be used in the manufacture of cases of bells and bells.

In a bell, consisting of a metal body, open on one side, producing sound when struck by it, and an impact load located inside the body at the level of the lower edge suspended in its upper part, the body is made of non-porous, chemically uniform, with a small primary grain metal, mainly by extrusion molding with crystallization under pressure (LVCD). In this case, the case is made of tin bronze with an optimal ratio in the alloy of the δ phase — the carrier of acoustic properties and the α phase — carrier of mechanical properties (strength and ductility) provided by the tin content in it within 22.5 ± 0.5%, or bimetal: black alloy - non-ferrous alloy.

Using the utility model allows to improve the quality of the bells (improve sound, extend the time until the sound attenuates completely), eliminate the marriage of cases by cracks during casting and during operation of the bells.

Description

The utility model relates to a bell business and can be used in the manufacture of cases of bells and bells.

A bell is known, consisting of a metal case, open on one side, producing sound when struck by it, and an impact load, located inside the case at the level of the lower edge of the open side, suspended in its upper part (Olovyannikov N.I. History of bells and bell art M., 1912. Technical Encyclopedia, vol. II.M., 1929, p. 425).

The body of the famous bell is made by gravitational pouring from a Cu-Sn alloy superheated above the liquidus point (with a tin content of 20-22%).

The cast material obtained by gravitational pouring of an overheated alloy is characterized by porosity, chemical inhomogeneity, and large primary grain. The presence of porosity adversely affects the duration of the sound (before attenuation).

Chemical heterogeneity and coarse primary grains do not provide stable quality of castings, with an upper tin content (22%) due to brittleness and cracking. At the same time, at the maximum tin content, the sound of the bell is the best.

The purpose of the proposed utility model is to eliminate the noted drawbacks, namely, improving the quality of the bells, eliminating the marriage of molten bodies along cracks.

This goal is achieved by the fact that in the bell, consisting of a metal casing, open on one side, producing sound when struck by it, and shock, located inside the casing at the level of the lower edge suspended in its upper part, the casing is made of non-porous, chemically homogeneous, with a small primary grain of metal, mainly by extrusion molding with crystallization under pressure (LVCD).

Elimination of porosity in the casting of bell housings allows you to increase the time until the sound attenuates completely during its operation and, in combination with chemically homogeneous and small primary metal grains, increase the ductility of the material (about 2 times) and thus avoid cracking during the casting of the bell and during it work.

Another difference of the utility model is that the case is made of tin bronze with the optimum content in the alloy of the δ phase — the carrier of acoustic properties and the α phase — carrier of mechanical properties (strength and ductility), provided by the tin content in it within 22.5 ± 0.5%.

With such a tin content, the best sounding of the bell is achieved, and the absence of cracks in the casting during casting and operation is achieved by increasing the ductility of the cast metal provided by the method (LHD).

Another difference of the proposed model is that the body is made of bimetal: black alloy - non-ferrous alloy.

The bimetallic casing allows saving non-ferrous metal, eliminating shrinkage defects of the non-ferrous alloy layer.

Figure 1 presents the bell for the church belfry, figure 2 is a bimetallic bell housing.

The bell consists of a casing 1 made of tin bronze, an impact load 2, a suspension 3 fixed in a loop 4.

The housing 1 is made of a non-porous, chemically homogeneous with a small primary grain of metal method of squeezing with crystallization under pressure (LVCD), when pouring the alloy into a mold in the crystallization interval and solidifying it under gas pressure.

The bimetallic bell housing consists of an inner steel shell 5 and an outer bronze layer 6.

The work of the bell.

When the load 2 is hit on the lower edge of the housing 1, the resonant δ phase, which depends on the maximum content of tin in it - the carrier of the acoustic properties of the alloy, ensures optimal sounding, and the absence of pores provides delayed sound attenuation.

Using the utility model allows to improve the quality of the bells (improve sound, extend the time until the sound attenuates completely), eliminate the marriage of cases by cracks during casting and during operation of the bells.

Claims (3)

1. The bell, consisting of a metal body, open on one side, producing sound when struck by it, and an impact load located inside the body at the level of the lower edge suspended in its upper part, characterized in that the body is made of non-porous, chemically uniform , with a small primary grain of the metal, mainly by injection molding with crystallization under pressure (LVCD). 2. The bell according to claim 1, characterized in that the casing is made of tin bronze with an optimum ratio in the alloy of δ — the carrier phase of the acoustic properties and α — the carrier phase of the mechanical properties (strength and ductility) provided by the tin content in it within 22.5 ± 0.5%. 3. The bell according to claim 1, characterized in that the casing is made of bimetal: black alloy non-ferrous alloy.