• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A device for deburring workpieces with ultrasound is proposed, comprising: at least one ultrasound transducer (4); at least one sonotrode (6) which is mechanically connected to the ultrasound transducer (4) for transmitting the vibrations, the sonotrode (6) having at least one vibrating sonotrode surface (6 ') being immersed in a tank which can be filled or filled with a liquid; which is characterized in that the ultrasonic transducer (4) and sonotrode (6 ') are designed as a common hand-held or hand-held device.
    公开号:CH712990B1
    申请号:CH00133/18
    申请日:2015-11-24
    公开日:2020-05-29
    发明作者:Dreyer Thomas
    申请人:Weber Ultrasonics AG；
    IPC主号:
    专利说明:

    The invention relates to a device for deburring workpieces with ultrasound according to the preamble of claim 1 and a corresponding system for deburring workpieces with ultrasound. Such a device typically comprises an ultrasound transducer and a sonotrode, which is mechanically connected to the ultrasound transducer for transmitting the vibrations. The sonotrode can be immersed in at least one vibrating sonotrode surface in a liquid tank.
    In a large number of technical applications, it is necessary to free workpieces from undesirable burrs, for example by means of electrochemical or thermal processes or else high-pressure water jet processes.
    It is also possible to deburr workpieces using ultrasound. A corresponding device for deburring workpieces by means of ultrasound is described in German patent application No. 10 2015 106 343.3 by the applicant Weber Ultrasonics GmbH dated April 24, 2015.
    A disadvantage of the prior art mentioned is that the previously known devices are relatively large and expensive and are designed more for series treatment of the workpieces. Deburring individual workpieces or even just areas of individual workpieces is associated with a disproportionately large (cost) effort.
    The present invention is therefore based on the object to propose an alternative device for deburring workpieces, which is inexpensive and easy to use.
    This object is achieved by a device with the features of claim 1 and by a system with the features of claim 14.
    Advantageous embodiments of the device according to the invention can be found in claims 2 to 13. An alternative to the system defined in claim 14 can be found in claim 15. The wording of all claims is hereby explicitly included in the description by reference.
    [0008] An apparatus according to the invention for deburring workpieces with ultrasound comprises:<tb> <SEP> at least one ultrasonic transducer andat least one sonotrode which is mechanically connected to the ultrasound transducer for transmitting the vibrations, the sonotrode having at least one vibrating sonotrode surface being immersed in a tank which can be filled or filled with a liquid.
    It is essential that the ultrasonic transducer and sonotrode are designed as a common hand-held or hand-held device.
    It is generally known from applications for ultrasonic welding that cavitation occurs. This occurs preferentially at imperfections on the surface, since microscopic glass bubbles adhere there when immersed in the liquid. This can be the case, in particular, on ridges and in bores. According to the applicant's knowledge, this effect can be used for deburring metallic components by means of targeted cavitation, since the energy released when the individual gas bubbles collapse blows off any burrs that may be present. The workpiece to be deburred should be briefly exposed to intensive ultrasound-induced cavitation in order to carry out deburring. The underlying process of deburring with ultrasound is described in German patent application No. 10 2015 106 343.3 of the applicant Weber Ultrasonics GmbH dated April 24, 2015, the content of which is hereby explicitly incorporated by reference.
    A particularly intensive cavitation can be achieved on the surface of ultrasonic frequency vibrating sonotrodes which are immersed in a liquid medium. Sonotrodes are generally tools for ultrasonic welding, which are set in motion by the introduction of high-frequency mechanical vibrations (ultrasound). They typically establish the connection between the ultrasound generator and the workpiece and introduce the vibrations into it.
    The reason for the intensive cavitation is that compared to conventional sound transducers for cleaning technology in sonotrodes, the amplitude of the mechanical deflection is significantly higher.
    The device according to the invention thus differs in essential aspects from previously known devices: ultrasonic transducer and sonotrode are designed as a hand-held or hand-held device, i. H. that the ultrasonic transducer and the sonotrode are designed as a common element which is guided by a user by hand when deburring workpieces with ultrasound. The ultrasonic transducer and sonotrode are rigidly connected to one another in order to transmit the mechanical vibrations from the ultrasonic transducer to the sonorode.
    This results in particular in the advantages that the device can be used individually and also areas which are difficult to reach of a workpiece to be deburred are subjected to ultrasound with the hand-held device and can thus be freed from troublesome burrs. Another advantage is that the design of the ultrasonic transducer and sonotrode as a hand-held device enables a compact and inexpensive implementation that is also suitable for occasional and individual use.
    Particularly in hard-to-reach areas, such as bores or angles, it is possible in a simple manner with the hand-held device to remove unwanted burrs and to rework these areas locally until the desired result is obtained.
    In a preferred embodiment of the invention, a mechanical transformer (booster) for increasing or reducing the mechanical amplitude is arranged between the ultrasonic transducer and the sonotrode. The transformer preferably acts as a reinforcing element and can thus lead to a higher amplitude of the mechanical deflection of the sonotrode, which in turn leads to an increased generation of cavitation in the liquid and thus to increased deburring. The use of such transformers is basically known from applications for ultrasonic welding.
    According to a development of the invention, the device comprises a spacer for setting a constant distance between the at least one vibrating sonotrode surface and the workpiece to be deburred. The spacer can be used to ensure that the intensive cavitation that occurs on the vibrating sonotrode surface leads to the removal of burrs on the surface of the workpiece. The spacer is advantageously adjustable such that the constant distance of the above-mentioned sonotrode surface from the workpiece is at least 0.1 mm, but is smaller or at most the same size as an acoustic wavelength in the liquid. The spacer can therefore be used to ensure that the workpiece is not damaged by the sonotrode, even in the case of the hand-held device, and that defective deburring only occurs due to the excessive distance between the sonotrode and the workpiece to be deburred.
    A further preferred embodiment comprises a monitoring device which is designed to continuously monitor compliance with a constant distance between the sonotrode surface and the workpiece. The monitoring device can be designed with a feedback device for a user. A signal is preferably sent to the user when the distance between the sonotrode surface and the workpiece to be deburred lies outside a desired, preferably presettable, range.
    A further advantageous embodiment of the device comprises a weight compensation for the hand-held device. The weight compensation is provided to compensate for the weight of the hand-held device (at least ultrasound transducer and sonotrode). The weight is balanced by an opposite force, which can be generated by, for example, a counterweight, a spring or an active drive. Without external influence, the weight balance adjusts to a balanced rest position. Depending on the frequency range of the ultrasound transducer and thus the size of the ultrasound transducer, the weight of the hand-held device of the device can be in the single-digit kilogram range. Here it is advantageous for a user for a stress-free and controlled use of the device if the weight of the hand-held device is compensated for by the weight compensation.
    In another preferred development of the device, the sonotrode is arranged interchangeably. The sonotrode and / or the transformer and / or the ultrasound transducer are preferably arranged interchangeably. This has the advantage that different ultrasound frequency ranges can be covered with a basic device by changing the parts mentioned. Furthermore, the exchangeable sonotrode allows the device to be adapted, for example, to different dimensions or geometries of the workpieces to be deburred and / or to different types of burrs etc.
    In a further preferred embodiment, the hand-held device is liquid-tight. The device preferably comprises a housing for the ultrasound transducer, the sonotrode and the housing being connected to one another in a liquid-tight manner. This has the advantage that the sonotrode or the hand-held device can be immersed in the liquid without causing damage to the device. Even liquid splashes or the like cannot cause any damage to the device.
    [0022] In a further preferred embodiment, the device has a grip area which is ergonomically tapered. A user can thus handle the handheld device more easily. The device preferably comprises a housing for the ultrasound transducer, which housing is ergonomically tapered in the grip area. The ultrasonic transducer is thus arranged in the housing, so that a grip area on the ultrasonic transducer can be provided in a simple manner, which makes handling more convenient for the user and enables controlled guidance during deburring.
    In a further advantageous development of the invention, a button or switch for activating the ultrasonic vibrations is arranged on the hand-held device of the device. The button or switch is connected to the ultrasound generator. The button or switch activates the ultrasound generator, which supplies the ultrasound transducer with electrical energy in order to excite the ultrasound transducer to mechanical vibrations. A user can thus activate the ultrasound directly on the hand-held device.
    In an advantageous development, the device comprises active cooling for the ultrasound transducer, particularly preferably compressed air cooling or a fan integrated in the hand-held device.
    In a further advantageous embodiment, the device comprises at least one ultrasound generator, which is designed to supply the ultrasound transducer with electrical energy in order to excite the ultrasound transducer to mechanical vibrations. The ultrasound generator excites the ultrasound transducer to mechanical vibrations, and the ultrasound transducer further excites the sonotrode to vibrate in the ultrasound frequency range.
    Preferably, the ultrasonic generator is designed to generate an ultrasonic frequency of the vibrations of at least about 10 kHz and at most about 50 kHz, preferably about 18 kHz to about 35 kHz, most preferably about 20 kHz to about 30 kHz.
    [0027] The hand-held deburring device can be particularly advantageous for deburring bores. For this purpose, a long and narrow sonotrode is preferably inserted into the bore so that the cavitation bubbles can remove the burrs inside the bore. The hand-held deburring device is also particularly suitable for deburring other hard-to-reach areas of workpieces.
    Another aspect of the invention relates to a system for deburring workpieces with ultrasound. The system comprises at least one device according to the invention for deburring workpieces with ultrasound, an ultrasound generator which is designed to supply the ultrasound transducer with electrical energy in order to excite the ultrasound transducer to mechanical vibrations, and a tank which can be filled or filled with a liquid, so that the sonotrode is immersed in the liquid or can be immersed with at least one vibrating sonotrode surface. The device for deburring workpieces with ultrasound of the system is immersed with the sonotrode in the liquid of the tank and preferably guided at a defined distance along the areas of the workpiece to be deburred, so that the intensive cavitation that occurs there leads to the removal of the burrs.
    In another advantageous embodiment of the system for deburring workpieces with ultrasound, the device for deburring workpieces with ultrasound is designed with an ultrasound generator for generating an ultrasound frequency. The system accordingly comprises at least one corresponding device for deburring workpieces with ultrasound and a tank which can be filled or filled with a liquid, so that the sonotrode is immersed or immersed in the liquid with at least one oscillating sonotrode surface. The liquid is preferably a cleaning medium, as is known from previously known methods for cleaning with ultrasound.
    The device for deburring workpieces with ultrasound of the system is immersed with the sonotrode in the liquid of the tank and preferably guided at a defined distance along the areas of the workpiece to be deburred, so that the intensive cavitation occurring there leads to the removal of the burrs .
    Further preferred features and embodiments of the device and the system according to the invention are explained below with reference to exemplary embodiments and the figures. It shows:<tb> <SEP> Figure 1 with the partial images a, b and c, a first embodiment of a device according to the invention;<tb> <SEP> Figure 2 with the partial images a, b and c, a second embodiment of a device according to the invention with spacers.
    In Figures 1 and 2, the same reference numerals designate the same or equivalent elements. All dimensions are to be understood as examples and do not contain any restrictions beyond the protection claims.
    Figure 1 shows a schematic representation of a first embodiment of the device according to the invention in three views a, b and c.
    Figure 1a shows a device with a hand-held device 1 and a weight compensation 10. The device comprises a housing 5 in which an ultrasonic transducer 4 for converting electrical vibrations into mechanical vibrations and a booster (transformer) 3 for increasing the mechanical deflection are arranged, shown in Figure 1c. The housing 5 is formed with an ergonomically shaped grip area 8. A sonotrode 6 is arranged on the housing 5 with a vibrating surface of the sonotrode (vibrating sonotrode surface) 6 '. The individual components 4-6 are connected to each other by screw connections and are therefore interchangeable.
    The ultrasonic transducer 4 is connected via the cable 7 in a signaling connection with an ultrasonic generator (not shown) and is supplied with electrical energy by the latter. The ultrasound generator has a control system which regulates the mechanical amplitude of the ultrasound transducer 4 and enables this amplitude to be set in a range of, for example, 10 to 100% based on a maximum mechanical amplitude. In the present case, the ultrasonic transducer 4 is designed - without limitation - for a maximum oscillation frequency in the range of 35 kHz. Such ultrasonic generators are known to the person skilled in the art and are used, for example, in devices for ultrasonic welding.
    The sonotrode 6 is immersed in a tank filled with liquid medium (not shown). When the sonotrode 6 is operated with ultrasound, intensive cavitation occurs on the surface of the sonotrode 6 in the region of at least the sonotrode surface 6 ′. If the sonotrode 6 is now guided with the sonotrode surface 6 ′ at a (defined) distance along the areas of a workpiece to be deburred, the intensive cavitation that occurs there eliminates the burrs.
    Figure 1b shows the device of Figure 1a in a view rotated by 90 degrees. The weight compensation 10 is arranged on the hand-held device 1 so that the weight of the hand-held device 1 is compensated for and the cable 7 is not subjected to tension. The weight compensation 10 is designed here as a counterweight.
    Figure 1c shows a sectional view through the plane A - A shown in Figure 1a. The device comprises as a handheld device 1, a sonotrode 6 and an ultrasonic transducer 4. Between sonotrode 6 and ultrasonic transducer 4 is a transformer or booster 3 to increase the mechanical Deflection arranged. As can be seen in FIG. 1 c, the ultrasound transducer 4 is arranged in the housing 5 in such a way that the housing 5 forms a handle for the hand-held device 1. The housing 5 is ergonomically tapered in a central region 8, so that a user can comfortably grip and guide the hand-held device.
    Figure 2a shows a schematic representation of a second embodiment. 2b shows the view from FIG. 2a rotated by 90 degrees. FIG. 2c shows a sectional illustration of the second exemplary embodiment through the plane A - A identified in FIG. 2a. In order to avoid repetitions, the differences between the figures are mainly dealt with below.
    The device comprises as a hand-held device 1 a sonotrode 6 and an ultrasonic transducer 4. Between the sonotrode 6 and ultrasonic transducer 4, a transformer (booster) 3 is arranged to increase the mechanical deflection. As can be seen in FIG. 2 c, the ultrasound transducer 4 is arranged in the housing 5 in such a way that the housing 5 forms a handle for the hand-held device 1. The housing 5 is ergonomically tapered in a central region 8, so that a user can comfortably grip and guide the hand-held device.
    In the present case, the ultrasonic transducer 4 is designed - without limitation - for a maximum oscillation frequency in the range of 20 kHz.
    A button (11) for activating the ultrasonic vibrations is arranged on the hand-held device (1) of the device. The button (11) is connected to the ultrasound generator (not shown) via the cable 7. The button (11) enables an ultrasound to be activated by a user directly on the hand-held device (1).
    The device additionally comprises a spacer 12. This embodiment is particularly suitable for deburring bores. The spacer 12 lies with the surface 12 'on a workpiece and thus ensures a maximum depth of penetration into the bore. This prevents damage to the workpiece.
    The spacer 12 can also be arranged on the device 1 such that a constant distance between the vibrating surface of the sonotrode 6 'and the workpiece is at least 0.1 mm and is at most the same size as an acoustic wavelength in the Liquid.
    权利要求:
    Claims (15)
    [1]
    1. Device for deburring workpieces with ultrasound, comprising:at least one ultrasonic transducer (4);at least one sonotrode (6) which is mechanically connected to the ultrasound transducer (4) for transmitting vibrations, the sonotrode (6) having at least one vibrating sonotrode surface (6 ') being immersed in a tank which can be filled or filled with a liquid;characterized,that the ultrasonic transducer (4) and the sonotrode (6 ') are designed as a common, handheld device (1).
    [2]
    2. Device according to claim 1,characterized,that a mechanical transformer (3) for increasing or reducing the mechanical amplitude between the ultrasonic transducer (4) and the sonotrode (6) is attached.
    [3]
    3. Device according to one of the preceding claims,characterized,that the device comprises a spacer (12) for setting a constant distance between the at least one vibrating sonotrode surface (6 ') and a workpiece to be deburred.
    [4]
    4. The device according to claim 3,characterized,that the spacer is adjustable such that the constant distance of the at least one vibrating sonotrode surface (6 ') from the workpiece to be deburred is at least 0.1 mm and corresponds at most to an acoustic wavelength in the liquid.
    [5]
    5. Device according to one of the preceding claims,characterized,that the device comprises a monitoring device which is designed to continuously monitor compliance with a constant distance between the sonotrode surface (6 ') and a workpiece to be deburred.
    [6]
    6. Device according to one of the preceding claims,characterized,that the device comprises a weight compensation (10) for the handheld device.
    [7]
    7. Device according to one of the preceding claims,characterized,that the sonotrode (6) is arranged interchangeably, preferably that a mechanical transformer (3) and / or the ultrasonic transducer (4) are also arranged interchangeably.
    [8]
    8. Device according to one of the preceding claims,characterized,that the hand-held device (1) is liquid-tight, particularly preferably that the device comprises a housing (5) for the ultrasonic transducer (4) and the sonotrode (6) and the housing (5) are liquid-tight.
    [9]
    9. Device according to one of the preceding claims,characterized,that the device has a handle area (8) which is ergonomically designed, in particular tapered, preferably that the device comprises a housing (5) for the ultrasound transducer (4) and the housing (5) in the handle area (8) is ergonomically designed, in particular is rejuvenated.
    [10]
    10. Device according to one of the precedingClaims, characterized,that the device comprises active cooling for the ultrasound transducer (4), particularly preferably compressed air cooling.
    [11]
    11. Device according to one of the precedingClaims, characterized,that the device comprises a button (11) for activating the ultrasonic vibrations, which button (11) can preferably be activated by a user of the handheld device (1).
    [12]
    12. Device according to one of the precedingClaims, characterized,that the device additionally comprises at least one ultrasound generator which is designed to supply the ultrasound transducer (4) with electrical energy in order to excite the ultrasound transducer (4) to mechanical vibrations.
    [13]
    13. The apparatus of claim12, characterized,that the ultrasound generator is designed to generate an ultrasound frequency of the vibrations of at least 10 kHz and at most 50 kHz, preferably 18 kHz to 35 kHz, most preferably 20 kHz to 30 kHz.
    [14]
    14. System for deburring workpieces with ultrasound, comprising:at least one device for deburring workpieces with ultrasound according to one of claims 1 to 11,an ultrasound generator, which is designed to supply the ultrasound transducer (4) with electrical energy, to excite the ultrasound transducer (4) to mechanical vibrations anda tank which receives the workpiece and can be filled or filled with a liquid, so that the sonotrode (6) is immersed or immersed in the liquid with at least one vibrating sonotrode surface (6 ').
    [15]
    15. A system for deburring workpieces with ultrasound, comprising:at least one device for deburring workpieces with ultrasound according to claim 12 or 13 anda tank, which receives the workpiece and can be filled or filled with a liquid, so that the sonotrode (6) is immersed or immersed in the liquid with at least one vibrating sonotrode surface (6 ').
    类似技术:
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    同族专利:
    公开号 | 公开日
    TW201706072A|2017-02-16|
    DE202015104150U1|2016-09-08|
    WO2017025069A1|2017-02-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4032803A|1971-09-14|1977-06-28|Durr-Dental Kg.|Hand tool for creating and applying ultrasonic vibration|
    US5772627A|1996-07-19|1998-06-30|Neuro Navigational Corp.|Ultrasonic tissue resector for neurosurgery|
    JP2002035485A|2000-07-25|2002-02-05|Kao Corp|Ultrasonic cleaning device|
    JP3768978B2|2003-06-16|2006-04-19|株式会社クマザキエイム|Ultrasonic cleaner|
    ES2659512T3|2004-12-13|2018-03-16|Fritz Studer Ag|Tool unit for ultrasonic assisted rotary machining|
    CN101222998B|2005-07-20|2010-12-15|Sca卫生产品股份公司|Device and method for processing materials by ultrasonic device|
    DE102015106343A1|2015-04-24|2016-10-27|Weber Ultrasonics Gmbh|Device and method for deburring components by means of ultrasound|DE102016101313B4|2016-01-26|2018-05-30|HEMO GmbH|Sonotrode, device, system and method for deburring workpieces with ultrasound|
    法律状态:
    2020-09-30| PFA| Name/firm changed|Owner name: WEBER ULTRASONICS AG, DE Free format text: FORMER OWNER: WEBER ULTRASONICS AG, DE |
    优先权:
    申请号 | 申请日 | 专利标题
    DE202015104150.0U|DE202015104150U1|2015-08-07|2015-08-07|Device for deburring workpieces with ultrasound|
    PCT/DE2015/100499|WO2017025069A1|2015-08-07|2015-11-24|Device for deburring work pieces by means of ultrasound|
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