WO1998031478A1

WO1998031478A1 - An ultrasonic cleaning method of bearing balls and device

Info

Publication number: WO1998031478A1
Application number: PCT/SK1998/000002
Authority: WO
Inventors: Jozef SLOVÁK
Original assignee: Slovak Jozef
Priority date: 1997-01-16
Filing date: 1998-01-16
Publication date: 1998-07-23
Also published as: SK6197A3

Abstract

The bearing balls are cleaned by 2 up to 10 % cleaning solution of preparation with surface active substance and organic inhibitors of corrosion, for instance alcanolamins (preparation T30 firm BONASPOL), using ultrasonic at it, and subsequently they are rinsed by water. The device consists of inlet unit (V), operating unit (P) with ULS radiator and vessel for technological solutions and drying unit (S).

Description

AN ULTRASONIC CLEANING METHOD OF BEARING BALLS AND DEVICE

Technical field

The invention concerns a method and a device Tor ultrasonic (ULS) cleaning of bearing balls in a range of diameters 3 up to 35mm after second lapping, before checking by means of optical check device (AVIKO).

Background Art

At present there are several methods of ULS bearing balls well-known. In the most cases the cleaning is done by washing in acid, respectively alkaline degreasers and before drying the rinsing is done in alkaline solutions.

The present used methods of washing are dangerous due to explosiveness and flammability of alcohol, therefore protection against danger of explosion and fire is needed. The economic expenses are not negligible as well, due to relatively frequent replacement of alcohol rinsing preparation. The main deficiency of the present method of washing is ambitiousness for liquidation of the waste (alkali, acids and so on).

Disclosure of Invention

The method according to the invention solves the problem of the ULS cleaning of bearing balls and remarkably it removes the presented deficiencies. The principle of this invention is that washing is performed by means of saponin solution in minimally two ULS fields, and rinsing is performed in water where preparation with content of superficially active compounds and organic inhibitors of corrosion, for instance of alcanolamins is used as saponin solution. A preparation accessible from the firm BONASPOL with commercial name T30 is one of the convenient solutions. The whole process of washing and rinsing, including drying, is ecologically harmless, without need of liquidation of the waste. The saponin solution T30 is ecologically harmless and its liquidation is possible by draining-off into a town channel network.

Description of drawins

The invention will be clarified by means of drawing plan, in which:

Fig.1 represents a block diagram of the device for performance of the method according to the invention and

Fig.2 represents illustration of the operating cleaning unit.

Best Mode for Carrying Out the Invention

The device for performance of the method according to the invention consists of some fundamental parts, namely inlet unit V, operating unit P and drying unit S_. The individual parts form one solid ensemble together. The technological part of the device, shielded by two frames, is formed by the conveyer \_ , which performs transport and cleaning of balls as well, and by feeding tanks 11. 12. 13. 21. 22. 23 for hot and cold technological solutions. The space for the conveyer 1 is separated from the rest space of the frame by a barrier.

The lower part of the frames is shielded by a sheet door and the upper part by removable sheet cover that alleviate free access to conveyer and to the feeding tanks 11 , 12, 13, 21. 22. 23 .

The distribution of cleaning and rinsing preparations from the tanks to conveyer 1_via pumps is installed by hoses and galvanised fittings.

The inlet unit V performs filling of balls from transport pallets into the device and its dosing. The transport of balls into the feeding hopper and the doser is performed by a vertical chain conveyer. This is constructed so that carrier receiving hopper is fixed on two chains that are guided vertically in guide bars. The running is performed by a motor with thread-cutting machine electro- gearbox via a chain drive with a countershaft. The motion of the holder is ensured at the end position by an end breaker.

The filling surface for balls is down-graded towards a dosing roll that is driven by chain gearing from a gear motor. The roll has row of necking-downs throughout the its length. The dimensions of the necking-downs enable to overshoot even the extreme cleaned balls against the direction of the roll rotation. When the roll is at rest, the balls are mutually stuck into the inlet of the necking- downs after a short time and they stop to drop into chute of the conveyer 1. When the roll begins to rotate in the direction of watch hands, balls stuck into walls of its necking-downs are shifted or thrown out and thus it is enabled successive overflow into the chute of the conveyer 1 . Thus it is possible to dose balls roughly without congestion.

The conveyer except transport function performs nearly the whole technological process of the ball cleaning. It is an unit-built device what enables to construct arbitrary conveyer in principle according to number and type of technological positions. The frame of the conveyer consists of bolted together anticorrosive beams, sides and cross beams. The guide bars for the chain are fixed on the sides. The chains are guided along both sides of the conveyer and they are mutually and in regular intervals of four pitches connected by transversals, which make the transport of the balls so that these roll in gaps between transversals along path made of a polished antic ^rrosive sheet. In the first two sections 11 , 12 the path goes tightly under ULS emitters 4. In the rinsing sections 21. 22, 23 only dipping of balls is performed and at the outlet of each section the ones are rinsed by liquid from a spray. Under each technological position collecting vats made of anticorrosive sheet are fixed. They are mounted on profiles screwed on the frame of the conveyer. This structure enables its easy dismantling and cleaning if it is needed. The profiles can be screwed off, the connection hose removed and the vat can be simply shifted out without dismantling of the conveyer. The each vat has three discharge holes. The one is in the dropped bottom and the other two behind the overflow on the side of the vat. The discharge hole on the bottom has such cross-section that only small part of fed liquid can flow off. This discharge hole performs drainage of sedimentary impurities, that during cleaning have tendency to sediment on the bottom of the vat. After the end of the operation the whole content of the vat is discharged . A excess of technological liquid flow out through the overflow on the left part of the vat into proper tank. Thus constant level of the liquid is maintained.

A direct-curent gear motor performs a drive of the conveyer via chain drive.

The balls drop into the chute and stopped by feed stops. The motion of the feed stops is controlled by two pneumatic rolls, a cam and conectorless breaker. During the first phase the stop is closed and the whole mass of balls is shifted up to a second stop. During the second phase the first stop is closed and the second stop is opened that lets in appropriate number of balls into the conveyer. After this operation the stops are opened according to the previous description and thus the whole number of balls is dosed into the conveyer. At the end of the conveyer the balls fall into outlet chute by which they are conducted into a drying unit.

The base of the drying unit S is a thread conveyer driven by electro- gearbox via a chain gearing 1 :3. Balls come into a receiving hopper of the drying unit from outlet channel of the conveyer. The rib of the threading machine shifts the balls along of a guiding roll. At the same time pre-heated air with temperature

7θO C by passing the ribs of the threading machine comes into the guiding roll by which perfect drying the balls is assured after rinsing. Tie outlet of the drying unit discharges into a pallet situated on an unloading vertical conveyer.

The operating cleaning unit 0 represent an individual construction and is made of an anticorrosive sheet (anticor). It consists of three water-tightly separated sections 11 ,12,13. In the first two 11 ,12 there is cleaning medium and in the third section there is drinking water. The individual section are the same dimensions and have the same equipment.

In the first and the second section 11.13 there are four heaters hung up edge of the vat. In the third section 3 there is indirect heating with eight heaters 3 The suction baskets of the pumps are over the bottom on higher level so that pumps can't draw in impurities settling near the bottom.

Each section is equipped by a cover. The fats settling down near the bottom are conducted into waste via overflow pipe. On the bottom each section is equipped by discharge opening by which the liquid can be discharged by self-drop into the waste. Each section is equipped by adjustment thermostat. The feeding tank is isolated thermally.

The rinsing unit 20 has similar construction like cleaning unit 10. It differs from the unit 10 in such a way that it has not to include heaters, temperature insulation and its sections 21 ,22,23 have not to be of the same dimensions. The middle section 22 is most large as a rule and along one its side there is one and along the other two equal sections. In the first two sections 21 ,22 drinking water is used and in the last third section 23 distilled water is used.

The method according the invention was realised as follows

4% solution of cleaning preparation was made, where saponin preparation with commercial marking T30 firm BONASPOL in distilled water was used. This preparation includes surface active substance and organic inhibitors of corrosion on the base of alcanolamins. Owing to hygienic harmless of this preparation there is no need satisfaction of any special safety requirements and conditions during its use and handling. This prepared solution was poured in up to edge of an overflow pipe into the first and the second section 11.12 of feeding tank of cleaning unit 10. Into the third section 12 of cleaning unit 10 was filled up drinking water.

The first two sections 21 ,22 rinsing unit 20 were filled up by drinking water and the third section 23 distilled water. At the same time all sections 11.12,13.21.22.23 were filled up to edge of an overflow pipe.

After heating of cleaning solutions in the three sections 11 ,12,13 of cleaning unit O (about 30min) the conveyer 1 was put into motion. First bearing balls lying on the conveyer were transported through the first sections 11 ,12 cleaning section 1_0 , where they were subjected to cleaning in solution T30 at temperature 60 °C up to 70 °C using ULS. In each section the power of ULS is 1200VA. Then the bearing balls were rinsed in the third section 13 of cleaning unit 10 at the same temperature of drinking water. After this the balls were transported by the conveyer 1 into rinsing unit 20 , in the first sections 21.22 they were rinsed by immersion and splashing in drinking water and finally in the third section 23 rinsing unit 20 were rinsed in distilled water. Finally the balls were dried out in drying unit S air heated to temperature about 70°C.

Claims

1. The method of ultrasonic cleaning of bearing balls, characterised by the fact that bearing balls are cleaned by 2 up to 10% cleaning solution of preparation with surface active substance and organic inhibitors of corrosion, for instance alcanolamins (preparation T30 firm BONASPOL), using ultrasonic at it, and subsequently they are rinsed by water.

2. Method according to claim 1 , characterised by the fact that balls are cleaned 1 up to 3 minutes at temperature 50┬░C up to 80┬░C, at least twice in succession.

3. Method according to claims 1 and 2, characterise, by the fact that 4% cleaning solution of preparation T30 is used for cleaning.

4. The method according to any previous claims, characterised by the fact that after final cleaning the rinsing is performed in water at least twice in succession.

5. The method according to claim 4, characterised by the fact that that rising is performed in water at temperature 20┬░C up to 80┬░C.

6. The method according to any previous claims, characterised by the fact that the last rinsing is performed in distilled water in the last sections.

7. The method according to any previous claims, characterised by the fact that after the last rinsing in distilled water in the last section the balls are dried by warm air at 60┬░C up to 80┬░C.

8. The device for the method according to the previous claims, characterised by the fact that consists of inlet unit (V), operating unit (P) with ULS radiator and vessel for technological solutions and drying unit (S).

9. The device according to claim 8, characterised by the fact that the operating unit (P) consists of cleaning unit (10), that includes at least two cleaning sections (11 ,12) from which each is equipped by intake piping of cleaning liquid, at least by one, with advantage, by three discharged openings, over cleaning sections there is ULS radiator (4) and after cleaning unit (10) there is rinsing unit (20) that consists at least two (21 ,22) rinsing sections, where throughout the sections (11 ,12,13,21 ,22,23) cleaning unit (10) and rinsing unit (20) passes common conveyer (1) balls.