RU2275257C1 - Method of ultrasonic cleaning of metal parts - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to cleaning of metal parts from contamination in water alkaline solutions with application of ultrasound, in particular, to cleaning metal parts of bearings. Proposed method includes washing of parts in five baths of ultrasonic complex: in first bath containing degreasing water solution with MC-15 or MC-37 detergent, concentration of 20-25 g/l at temperature of solution within 60 and 70°C, in second bath with application of ultrasound in detergent TCM ("Gremlos B"), concentration of 20-30 g/l at temperature of 45-55°C, in third bath with application of ultrasound in not tap running water at temperature of 45-55°C, in fourth bath in cold tap running water, and in fifth bath in cold running distilled water with subsequent drying with hot air.

EFFECT: simplified method of cleaning , reduced labor input, increased labor productivity and improved quality of cleaning, reduced cost of cleaning.

Description

The invention relates to the cleaning of metal parts from technological contaminants in aqueous alkaline solutions with the application of ultrasound, and in particular to the cleaning of metal parts of bearings.

The closest method is the ultrasonic method of cleaning metal parts, for example metal balls, which consists in washing in five baths of the ultrasonic complex: (ultrasonic testing) in the first two baths with traditional high-salt solutions, detergents (MS) MS 6 and trisodium phosphate with the addition of a special corrosion inhibitor IFKHAN - IM, then in two baths with running tap water and in the last fifth bath with running distilled water, followed by drying with hot air [1].

However, this method has several disadvantages:

- difficult to perform and time-consuming due to the use of several components of alkaline solutions, the complexity of their preparation and adjustment of bathtubs;

- not economical enough due to the use of a large amount of distilled water;

- requires considerable time, since the preparation of alkaline solutions is long, is 1 hour;

- does not allow to achieve a sufficiently high quality of cleaning, after washing there are salt deposits, smudges, discoloration on the surface of metal parts;

- there is an instability of the washing process;

- low labor productivity;

- high cost;

- insufficiently good sanitary and hygienic working conditions.

The task of the invention is to simplify the method, reduce the complexity of its implementation, increase labor productivity, improve the quality of cleaning and reduce the cost of the process.

The problem is solved by ultrasonic cleaning of metal parts by washing them in 5 baths of the ultrasonic complex: in the first bath in a degreasing aqueous solution containing detergent MS-15 or MS-37 with a concentration of 20-25 g / l, solution temperature 60-70 ° C , in the second bath with the application of ultrasound by technically detergent (TMS) Gremlos B with a concentration of 20-30 g / l, temperature 45-55 ° C, in the third bath with the application of ultrasound with hot running tap water at a temperature of 45-55 ° C, fourth cold flow bath th tap water and in the fifth bath running cold distilled water followed by drying with hot air.

What is new is that in the first bath, a preliminary washing is carried out with a degreasing aqueous solution containing MS-15 or MS-37 with a concentration of 20-25 g / l, a temperature of 60-70 ° C, in a second bath with the application of ultrasound TMS "Gremlos B" concentration 20-30 g / l, temperature 45-55 ° C and in the third bath running tap water with a temperature of 45-55 ° C.

This set of distinctive features has led to the achievement of a new technical result and it clearly does not follow from the prior art for a specialist. The proposed method is tested at OJSC "Rolt" Tomsk.

Thus, this technical solution meets the criteria of the invention of "novelty", "inventive step", "industrially applicable".

The method is as follows.

After nursing in a machine with industrial oil, washing in diesel fuel, metal parts are fed to ultrasonic cleaning of ultrasonic testing. When nursing in oil for finishing operations, cold etching of metal parts for the presence of shells is carried out in the central factory laboratory, as well as visual inspection of the appearance and surface quality (surface defects) GOST 3722-81 p. 6 p. 27. The delivery of metal parts for washing is carried out with a quality control card. Metal parts are loaded into hole buckets in 1-2 layers and kept in the first bath with a degreasing water solution until the following composition is completely degreased: detergent MS-15 or MS 37 dissolved in running tap water, concentration of 20-25 g / l, heated to a temperature of 60-70 ° C.

Then the metal parts are carefully poured into special drums and sequentially kept in the baths of 2,3,4,5 ultrasonic complex for 1-4 minutes in each bath. In the second bath, washed with the application of ultrasound TMS "Gremlos" concentration of 20-30 g / l at a solution temperature of 45-55 ° C.

TMS "Gremlos V" was developed and produced by the scientific and production company Gremlos LLC, Vladimir, TU 2499-002-43160694-2003., Hygienic certificate No. 33. V.L. 09.238. P.000372.04.03 from 04.10.2003 TMS "Gremlos V" is a liquid concentrate that is easily soluble in water at room temperature, from light yellow to dark brown, kinematic viscosity at 50 ° C, mm ² / c, not more than 30, density at 20 ° С kg / m ³ - 990 ... 1065, mass fraction of organic substances (mixture of amino alcohols, anionic and non-ionic surfactants),%, not less than 35 [2]. In the third bath with the application of ultrasound running tap water with a temperature of 45-55 ° C. In the fourth bath with cold running tap water and in the fifth bath with cold running distilled water by dipping with constant rotation of the cartridges in each bath. Then produce drying with hot air at a temperature of 40-50 ° C for 1-4 minutes.

Dry metal parts are poured into a plastic cassette lined with inhibited or waxed paper inside.

An aqueous degreasing solution is prepared as follows.

Fill tank to _^3/4 volume of potable water, heated to 50 ° C. In a separate container in the hot water poured from the protective mask, a calculated amount of MC, mixed well until complete dissolution, the solution was allowed to stand for 10 minutes and decanted through a filter cloth in a first container filled to _^3/4 volume of water heated to 50 ° C , and add water to the working volume, mix.

In the second bath TMS "Gremlos B" is poured without preliminary dissolution.

Specific examples of the method.

Example 1. The proposed method cleaned the metal balls of bearing parts of type 7/32 "(⌀-5,556). Metal balls in the amount of 2 kg were loaded into the ultrasonic complex. In the first bath, MC 37 was washed, t 70 ° C, concentration 25 g / l. In the second bath with the application of ultrasound TMS "Gremlos" concentration of 25 g / l at a solution temperature of 55 ° C.

In the third bath with the application of ultrasound running tap water at a temperature of 45 ° C.

In the fourth bath with cold running tap water and in the fifth bath with cold running distilled water, by dipping with constant rotation of the cartridges in each bath, for 2 minutes in each bath. Then, drying was performed with hot air at a temperature of 40 ° C for 2 minutes. Dry metal balls were poured into a plastic cassette.

The metal balls after cleaning on the ultrasound complex came out clean, shiny without smudges and discoloration from the first presentation.

Example 2

The proposed method cleaned the metal balls of the bearing parts type 9/16 "(⌀-14,288). Metal balls in the amount of 3 kg were loaded into the ultrasonic complex.

In the first bath, MS 15, t 60 ° С, concentration of 20 g / L was washed.

In the second bath with the application of ultrasound TMS "Gremlos" concentration of 20 g / l at a solution temperature of 45 ° C.

In the third bath with the application of ultrasound running tap water with a temperature of 55 ° C.

In the fourth bath with cold running tap water and in the fifth bath with cold running distilled water by dipping with constant rotation of the cartridges in each bath, for 1 minute in each bath. Then they were dried with hot air at a temperature of 50 ° C for 1 min. Dry metal balls were poured into a plastic cassette. The metal balls after cleaning on the ultrasound complex came out clean shiny without smudges and discoloration.

Example 3

The proposed method washed the rings of type 302/02. Loaded in the amount of 2 kg of rings in the ultrasonic complex.

In the first bath, MS 15, t 65 ° С, concentration of 20 g / L was washed.

In the second bath with the application of ultrasound TMS "Gremlos" concentration of 20 g / l at a solution temperature of 50 ° C.

In the third bath with the application of ultrasound running tap water with a temperature of 50 ° C.

In the fourth bath with cold running tap water and in the fifth bath with cold running distilled water by dipping with constant rotation of the cartridges in each bath, for 4 minutes in each bath. Then they were dried with hot air at a temperature of 50 ° C for 4 minutes. Dry metal rings were poured into a plastic cassette, the rings after washing on the ultrasonic complex came out clean, shiny, without smudges and discoloration.

Example 4

The proposed method washed the washers of type 60202. In an amount of 2 kg, the washer was loaded into an ultrasonic complex.

In the first bath, MS 15, t 60 ° С, concentration of 25 g / L was washed.

In the second bath with the application of ultrasound TMS "Gremlos" concentration of 25 g / l at a solution temperature of 50 ° C.

In the third bath with the application of ultrasound running tap water with a temperature of 55 ° C.

In the fourth bath with cold running tap water and in the fifth bath with cold running distilled water, by dipping with constant rotation of the cartridges in each bath, for 2 minutes in each bath. Then they were dried with hot air at a temperature of 50 ° C for 4 minutes. Dry metal parts were poured into a plastic cassette.

The washer after cleaning on the ultrasonic complex came out clean, shiny, without smudges and discoloration.

Example 5

The proposed method washed the separator type 201. In an amount of 3 kg, the separators were loaded into an ultrasonic complex.

In the first bath, MS 37 was washed, t 60 ° C, concentration of 25 g / l.

In the second bath with the application of ultrasound TMS "Gremlos" concentration of 25 g / l at a solution temperature of 50 ° C.

In the third bath with the application of ultrasound running tap water with a temperature of 55 ° C. In the fourth bath with cold running tap water and in the fifth bath with cold running distilled water by dipping with constant rotation of the cartridges in each bath, for 2 minutes in each bath. Then they were dried with hot air at a temperature of 50 ° C for 4 minutes. Dry metal parts were poured into a plastic cassette. The separators after cleaning on the ultrasonic complex came out clean, shiny, without smudges and discoloration.

The new proposed combination of distinctive features allowed to achieve a new positive effect.

So, the replacement of TMS-6 and trisodium phosphate in the first bath with the addition of the special inhibitor "Ifkhan-1" to MS-15 and MS-37 with the proposed concentration and temperature reduced the amount of salts remaining on the surface of metal parts without affecting the degreasing operation .

Application in the 2nd bath of TMS "Gremlos B" with the proposed concentration and temperature contributes to the ease of preparation of the washing solution, saving the time of the washing process. The surface-active substances that make up the Gremlos B TMC wash away dirt from the surface of metal parts, thereby improving the quality of their cleaning - amino alcohols form an invisible protective and passivating film with the surface of metal parts, which protects the surface of metal parts from corrosion.

Replacing hot water in the third bath with hot water made it possible to completely dissolve the remaining salts on the metal surface of the parts, and to remove smudges and discoloration.

The modes of concentration of solutions and temperature were chosen experimentally. These modes allow you to achieve optimally high quality cleaning of metal parts.

Thus, the proposed method through the use of new distinctive features has the following advantages:

- the quality of washing metal parts has improved;

- the method is more economical due to the replacement in the first and second baths of distilled water with plain tap water and the reduction of the components of the solutions. The economic effect is 477,435.88 rubles per year;

- increased productivity by reducing the time of preparation of solutions and reducing the time to obtain the results of chemical analysis, components of alkaline solutions;

- reduced cleaning time, since there is no need for a frequent change of distilled water, as well as due to the ease of dissolution and reduction of time for adjustment of solutions from 1 hour to 15 minutes;

- the cleaning process was simplified, and the complexity of the method was reduced by reducing the number of components of alkaline solutions and the simplicity of their preparation;

- the quality of cleaning has improved when using this method: there are no smudges on metal parts, discoloration due to the use of TMS Gremlos V and cleaning in hot water;

- improved sanitary and hygienic working conditions.

Information sources

1. Collection of scientific papers. Creation of new and improvement of existing technological processes for the production of bearing parts. NGO VNIPPP, Moscow, No. 3, 1988, p. 119.

2. Specifications TU 2499-002-43160694-2003. Technical detergent TMS "Gremlos V", Vladimir.

Claims (1)

The method of ultrasonic cleaning of metal parts by washing them in 5 baths of the ultrasonic complex for 1-4 minutes in each bath: in the fourth bath with running tap water, in the fifth bath with running distilled water followed by drying with hot air, characterized in that in the first bath rinsing produced in a degreasing solution containing detergent MS-15 or MS-37 with a concentration of 20-25 g / l, a solution temperature of 60-70 ° C, in the second bath with the application of ultrasound using the Gremlos B technical detergent s 20-30 g / l, temperature 45-55 ° C, in the third bath with the imposition of ultrasonic hot running tap water at 45-55 ° C.