EP3573771A1 - Ultraschallgerät mit einem kaltumformmaterial - Google Patents
Ultraschallgerät mit einem kaltumformmaterialInfo
- Publication number
- EP3573771A1 EP3573771A1 EP18706383.9A EP18706383A EP3573771A1 EP 3573771 A1 EP3573771 A1 EP 3573771A1 EP 18706383 A EP18706383 A EP 18706383A EP 3573771 A1 EP3573771 A1 EP 3573771A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cold
- tub
- forming material
- ultrasonic
- ultrasonic device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 51
- 238000002604 ultrasonography Methods 0.000 title abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 230000003628 erosive effect Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000005480 shot peening Methods 0.000 description 5
- 230000001052 transient effect Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011538 cleaning material Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229940127554 medical product Drugs 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
Definitions
- the invention relates to an ultrasonic device for cleaning of items to be cleaned with a cold forming material according to the preamble of claim 1.
- Ultrasound, in particular power ultrasound, which is coupled into the liquid via ultrasound radiating surfaces can be used, inter alia, to apply ultrasound and ultrasound-induced transient cavitation to a cleaning material located in this fluid.
- its surfaces can be processed, such as for cleaning, deburring, roughening or targeted damage or disintegration.
- Ultrasonic devices known from the prior art usually comprise a tub element which defines a filling space that can be filled with a cleaning fluid. In the cleaning liquid to be processed cleaning material can be inserted.
- such ultrasound devices have at least one ultrasound transducer.
- the ultrasonic transducers convert high-frequency electrical or magnetic alternating fields into mechanical oscillations, which are coupled into the liquid via the functional elements, that is to say the surface areas and special subareas or emission sections of the tub element, as an ultrasound radiating surface.
- transient cavitation is to be understood as meaning a formation and a chaotic implosion of bubble-like transient cavities in liquid clusters.
- the transient bubbles also contain liquid vapor and gases dissolved in the surrounding liquid.
- the object of the invention is therefore to provide an ultrasound device of the type mentioned,
- an ultrasonic device for cleaning items to be cleaned comprising a tub element with a tub inner surface facing a filling space that can be filled with liquid.
- the ultrasound device additionally comprises at least one ultrasound transducer, which couples ultrasound waves into the tub element via an associated emission section of the tub element.
- the tub element At least in the region of the emission section, the tub element comprises a cold-forming material which has a defined amount of inherent compressive stress introduced over the inner surface of the tub.
- an already shaped tub element is subsequently provided with a cold forming material.
- the subsequent cold forming surface processing of a one-piece tub element section is the same as introducing a cold-formed separate part into the tub element.
- the "emission section” is to be understood as meaning that section of the interior surface of the tank which lies above the transducer relative to the surface normal above the coupling section of the horn and in the case where no horn is used
- Area of a superposition section on which superimposed ultrasonic waves impinging adjacent Ultraschallwandier comprises a Kaltumformmaterial which has a introduced over the tub inner surface defined amount of compressive residual stress.
- welds of the tub element can be improved in that they are designed as cold-formed welds, which have an introduced defined amount of compressive residual stress.
- the welds can thus be processed with a suitable cold forming process to further enhance the advantages of the invention.
- the operational strength and service life are increased as a side effect.
- These welds may be weld seams facing the fill space.
- the compressive stress is a factor which determines the strength of the material to be treated, in particular the flexural strength, torsional strength,
- Bending fatigue strength, torsional fatigue strength and wear resistance ⁇ abrasion resistance One purpose of the shot peening is thus to densify the surface locally and to cold form accordingly. This also corresponds to a cold forming process by rolling. Different sizes / materials of balls with different speeds can be used. Cold forming of the surface results in plastic deformation of metals below the recrystallization temperature. Due to the resulting work hardening, the material strength increases continuously. Each bullet that hits the workpiece acts like a tiny forging hammer, leaving a shallow dome on the surface, which induces compressive stresses in the strike-in zone. The level of residual compressive stresses depends on the tensile strength of the base material and corresponds to approx. 80% of the component tensile strength. As a result, production-related residual stresses are eliminated and increases the life.
- tensile stresses are the cause of cracks and long-term damage. Tensile stresses try to pull a material surface apart, which leads to the formation of cracks in the surface. It has been proven by experiments that cracks never occur in a layer of residual compressive stress. The compressive stresses compress the grain boundaries on the surface and thereby significantly delay the formation of fatigue cracks. The cold forming process makes it possible to significantly increase the service life, the maintenance intervals and, above all, the safety of the components used with this material.
- the above methods allow introduction of Compressive stresses in the material to advantageously achieve higher resistance to ultrasound-induced cavitation erosion. It is envisaged that the material which has been treated by one or both of the above-described methods will have residual compressive stresses resulting in a higher resistance to ultrasound-induced cavitation erosion.
- the compression of the material surface by means of hammering and / or shot peening leads to a reduction of the damage to the tub element, but in particular in the emission section and also in the overlay section.
- the resulting higher residual compressive stresses in the edge zone of spheres introduced by spheres lead to a higher hardness of the ultrasound radiating and / or receiving surfaces and offer more resistance to the cavitation microjets and shock waves.
- the shot-blasted cold-forming material is a cold-formed material which is shot-blasted with stainless steel, glass and / or ceramic balls.
- the use of a material processed in this way for a tub element advantageously increases the effects associated with the invention.
- the balls have a grain size of 90 ⁇ m to 1 mm, a favorable adaptation to use requirements of the tub element can result.
- the cold-forming material is a cold-rolled, brushed and / or ball-polished cold-forming material. These methods also serve to introduce compressive stresses. - -
- FIG. 2a is a photograph of a brushed material
- FIG. 2b is a photograph of a shot peened cold forming material.
- the ultrasound device comprises a generator 4, which forwards electrical energy drawn from an electrical source, such as a socket, to two ultrasound transducers 6.
- the ultrasonic transducers 6 are arranged in on a bottom side of a tub member 8 made of stainless steel. However, the ultrasonic transducers 6 can also be arranged on a side wall region of the tub element 8. In any case, however, for sufficient cleaning effect, the ultrasonic radiating surface should be covered with cleaning liquid.
- the tub element 8 has a material thickness of 0.5 mm to 3.0 mm, preferably 0.8 mm to 2.0 mm, and defines a filling space 18, which is partially filled with a liquid 20.
- a scalpel 2 is shown, which represents a medical product and serves as a cleaning.
- Each ultrasonic transducer 6 connected to the generator 4 via a cable 5 comprises a horn 10, above each of which an emission section 12 of a tub inner surface 14 is formed.
- the inner surface of the tub 14 also has overlapping portions 16 on which superimposed ultrasonic waves of the two adjacent - -
- the emission sections 12 and / or the overlay section 16 are each cold-formed by means of shot peening, so that a defined amount of residual compressive stress is introduced into the tubing element 8.
- the emission portions 12 and the overlay portion 16 are each formed of stainless steel and each have a material thickness of 0.5 mm to 3.0 mm, preferably 0.8 mm to 2.0 mm.
- the emission sections 12 and the overlay section 16 are shown in FIG. 1 as delimitable areas of the tub inner surface 14, these sections 12, 16 may also mutually overlap and / or represent portions of a fully hammered and / or shot peened tub inner surface 14.
- the generator 4 is activated, which causes the two ultrasonic transducers to convert from electrical to mechanical vibrations.
- the two ultrasonic transducers 6 couple via their respective associated emission section 12 ultrasonic waves in the tub element 8, which in turn transmits the waves to the liquid 20 for cleaning the scalpel 2.
- Due to the cold forming of the emission sections 12 and the overlay section 16 is an ultrasonic device with a tub element. 8 created, which has a high cavitation erosion, wherein also cavitation erosion-related fines in the liquid 20 are significantly reduced.
- Fig. 2a shows a photograph of a brushed interior tub surface 14, as is known.
- Fig. 2b shows a photograph of a shot peened cold forming material.
- the brushed Matena shown in Fig. 2a! serve or a previously unguirstetes and cold-rolled material.
Landscapes
- Cleaning By Liquid Or Steam (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017101603 | 2017-01-27 | ||
PCT/EP2018/051211 WO2018137994A1 (de) | 2017-01-27 | 2018-01-18 | Ultraschallgerät mit einem kaltumformmaterial |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3573771A1 true EP3573771A1 (de) | 2019-12-04 |
EP3573771B1 EP3573771B1 (de) | 2021-11-10 |
Family
ID=61256885
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18706383.9A Active EP3573771B1 (de) | 2017-01-27 | 2018-01-18 | Ultraschallgerät mit einem kaltumformmaterial |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3573771B1 (de) |
WO (1) | WO2018137994A1 (de) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3113761A (en) * | 1961-07-26 | 1963-12-10 | Ultrasonic Ind Inc | Ultrasonic tank housing |
CH570210A5 (de) * | 1974-07-19 | 1975-12-15 | Telsonic Ag | |
US4527901A (en) * | 1983-11-21 | 1985-07-09 | Ultrasonic Power Corporation | Ultrasonic cleaning tank |
AU730210B3 (en) * | 1999-06-29 | 2001-03-01 | New Age Automotive Pty Limited | Improved ultrasonic cleaning system |
-
2018
- 2018-01-18 WO PCT/EP2018/051211 patent/WO2018137994A1/de active Search and Examination
- 2018-01-18 EP EP18706383.9A patent/EP3573771B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
EP3573771B1 (de) | 2021-11-10 |
WO2018137994A1 (de) | 2018-08-02 |
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