• 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:
    The invention relates to a device (1) for producing an impression in the surface of a test object, which can be received by a slide (3), for a hardness test by means of a test body (6) held by a test element carrier (5), the relative distance between the test body (6). and the slide (3) is adjustable by means of a first drive (8), wherein the first drive (8) is drive-connected to a rotatably mounted drive spindle (12) on which one fixed to the Prüfkörperträger (5) or the slide (3) connected spindle nut (18) engages. In order to enable a quick delivery of the test piece (6) to the test object and at the same time a high-resolution delivery of the test piece (6) during force application, it is provided that a second drive (9) is drive-connected to the drive spindle (12), wherein the first Drive (8) can be activated in a fast first delivery phase and the second drive (9) in a high-resolution second delivery phase.
    公开号:AT515288A4
    申请号:T50413/2014
    申请日:2014-06-13
    公开日:2015-08-15
    发明作者:Werner Buchsteiner
    申请人:Emco Test Prüfmaschinen Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a device for producing an impression in the surface of a test object for a hardness test held by a slide by means of a test body held by a Prüfkörperträger, wherein the relative distance between the test specimen and the slide for receiving the test object is adjustable by means of a first drive, wherein the first drive is drive-connected to a rotatably mounted drive spindle on which a spindle nut fixedly connected to the specimen carrier or the slide engages.
    The test object is the part picked up by the slide of the device whose hardness is to be tested. Under test specimens here is a penetrating into the test object under force body to understand, which is firmly connected to a Prüfkörperträger the device.
    In known hardness testing machines with vertically adjustable motor test body, the delivery of the test piece or indenter to the test object is very slow, since the force application requires a high resolution of the spindle drive and therefore a high gear reduction. For large delivery routes, however, this is extremely negative due to the high time required. Some hardness testing machines have a second vertical motor adjustment unit to enable fast feed to the workpiece for long travel distances. However, this solution requires two spindle drives and two vertical guide systems resulting in a high cost.
    The invention is therefore based on the object to provide a device of the type mentioned above, which in a simple way allows rapid delivery of the specimen to the test object and at the same time a high-resolution delivery of the specimen during force application, without two separate spindle drives and guide systems to have to use.
    This object is achieved in that a second drive is drive-connected to the single drive spindle, the first drive in a fast first delivery phase and the second drive in a high-resolution second delivery phase is activated, preferably the first drive at a first end of the spindle and the second drive acts on the drive spindle at a second spindle end. During the first delivery phase, the specimen is moved as close to the test object in overdrive, with no or only a small force is applied to the test object. Only in the following on the first delivery phase second delivery phase under defined force, almost in crawl, an impression in the surface of the test object generated, the speed of the drive spindle and thus the delivery speed of the specimen during the second delivery phase is substantially smaller than in the first Zustellphase.
    Since both drives act on a single drive spindle, components and production costs as well as costs can be saved.
    In order to enable infeeds with different speeds and different accuracies, the first drive acts on the drive spindle in the first feed phase with a higher drive speed than the second drive in the second feed phase. The first drive has a preferably electric first drive motor and the second drive a preferably electric second drive motor, wherein at least between the second drive motor and the drive spindle, a gear reduction is arranged in order to apply a high indentation force on the test body during the second delivery phase can. The first drive motor can act directly or indirectly, ie via a further gear ratio, on the drive spindle, wherein - if a further gear ratio between the first drive motor and the drive spindle is arranged - the gear ratio of the second drive a higher reduction ratio between an input and output speed of each transmission has as the gear ratio of the first drive.
    For connecting the first drive motor to the drive spindle, a rigid shaft coupling may be provided, which may be rigid or switchable. In order to enable a rapid and complete deactivation of the second drive during the first delivery phase, a switchable second clutch can be arranged between the second drive and the drive spindle. If the first clutch is not switchable, the first drive motor can be switched off in the second delivery phase.
    For example, the first drive motor can be connected directly to the drive spindle via a rigid shaft coupling and, due to the lower reduction ratio, enable a fast movement of the spindle nut. During the process with the first drive motor, the switchable second clutch of the second drive motor is opened. Due to the high reduction of the gear reduction of the second drive, a high-resolution and accurate movement of the spindle nut is made possible during the second delivery phase. During the process with the second drive motor, the first drive motor is de-energized and driven. Alternatively or additionally, the shaft coupling of the first drive can also be designed to be switchable and opened during the second delivery phase.
    The elimination of a second drive spindle and a second guide system results in a cost-effective and space-saving solution.
    The invention will be explained in more detail below with reference to FIG.
    The figure shows schematically a device 1 for producing an impression in the surface of a test material for a hardness test, wherein the device comprises a base 2 with a slide 3 for receiving a test object not shown, a machine stand 4 and a vertically adjustable Prüfkörperträger 5 for a test specimen 6, which is designed to produce an impression in the surface of the test object.
    The relative distance between a test piece 6 and the slide 3 for the test object can be changed by means of an adjusting device 7 acting on the test piece carrier 5. The adjusting device 7 has a first drive 8 and a second drive 9, wherein the first drive 8 on a first end 10 and the second drive 9 on a first end 10 facing away from the second end 11 of a rotatably mounted in the machine frame 4 of the device 1 drive spindle 12 acts. The first drive 8 has an electric first drive motor 13, which acts on the drive spindle 12 via a first gear reduction 15a. The first drive motor 13 can also act directly on the drive spindle 12. The second drive 9 has an electric second drive motor 14, wherein between the second drive motor 14 and the drive spindle 12, a second gear reduction 15b and a switchable clutch 16 (first clutch) is arranged. Between the first drive motor 13 and the drive spindle 12, a shaft coupling 17 (second clutch) may be arranged, which may be designed switchable or non-switchable.
    On the drive spindle 12 engages a spindle nut 18 which is fixedly connected to the vertically adjustable test body holder 5.
    In order to create an impression in the surface of a test object, the test object is positioned on the test object holder 3 and then the test object 6 is delivered to the test object. The delivery takes place in two delivery phases. In a first delivery phase, the first drive 8 is activated and the second drive 9 is deactivated by opening the clutch 16 between the second drive motor 14 and the drive spindle 12. Due to the direct drive of the drive spindle 12 by the first drive motor 13 and the low reduction ratio between the first drive motor 13 and the drive spindle 12, this is driven at a relatively high speed and thus the spindle nut 18 is moved in overdrive. At or shortly before the contacting of the test object by the test specimen 6, the first delivery phase is terminated and the second delivery phase is started by the first drive 8 is deactivated and the second drive 9 is activated. In this case, the first drive motor 13 is de-energized and the switchable clutch 16 between the second drive motor 14 and the drive spindle 12 is opened. Due to the high gear reduction 15 between the second drive motor 14 and the drive spindle 12, this is driven at a much lower speed than during the second delivery phase and thus the spindle nut 12 is moved in crawl. As a result, the test body 6 can be moved with high resolution and a high penetration force can be applied to the test object.
    权利要求:
    Claims (8)
    [1]
    A device (1) for producing an impression in the surface of a test object for hardness testing which can be received by a specimen slide (3) by means of a test body (6) held by a specimen carrier (5), the relative distance between the specimen (6) and the slide (3) by means of a first drive (8) is adjustable, wherein the first drive (8) is drivingly connected to a rotatably mounted drive spindle (12) on which one with the Prüfkörperträger (5) or the slide (3) firmly connected Spindle nut (18) engages, characterized in that a second drive (9) to the drive spindle (12) is drivingly connected, wherein the first drive (8) in a fast first delivery phase and the second drive (9) in a high-resolution second delivery phase is activatable.
    [2]
    2. Device (1) according to claim 1, characterized in that the first drive (8) acts on a first spindle end (10) and the second drive (9) on a second spindle end (11) on the drive spindle (12).
    [3]
    3. Device (1) according to claim 1 or 2, characterized in that the first drive (8) acts in the first delivery phase with a higher drive speed than the second drive (9) in the second delivery phase on the drive spindle (12).
    [4]
    4. Device (1) according to one of claims 1 to 3, characterized in that the first drive (8) has a preferably electric first drive motor (13) and the second drive (9) has a preferably electric second drive motor (14).
    [5]
    5. Device (1) according to claim 4, characterized in that between the second drive motor (14) and the drive spindle (12), preferably also between the first drive motor (13) and the drive spindle (12), at least one gear reduction (15b, 15a) is arranged.
    [6]
    6. Device (1) according to claim 5, characterized in that the gear reduction (15b) of the second drive (9) has a higher reduction ratio than the gear ratio (15a) of the first drive (8).
    [7]
    7. Device (1) according to one of claims 1 to 6, characterized in that between the first drive (8) and the drive spindle (12) and / or between the second drive (9) and the drive spindle (12) one - preferably switchable - clutch (16; 17) is arranged.
    [8]
    8. Device (1) according to one of claims 4 to 7, characterized in that in the first delivery phase of the second drive motor (14) and / or in the second delivery phase of the first drive motor (13) is currentless switchable. 2014 06 13 Fu
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    同族专利:
    公开号 | 公开日
    AT515288B1|2015-08-15|
    DE102015106277A1|2015-12-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4021178A1|1990-07-03|1992-01-09|Krautkraemer Gmbh|Measuring hardness using penetrating pointed rod - pushed by force e.g. wt. also used to hold retaining part for sample|
    AT509628B1|2010-03-29|2012-02-15|Qness Gmbh|HARDENING TEST APPARATUS AND METHOD FOR CONTROLLING THE MOVEMENT OF A TEST BODY OF A HARDENING TEST APPARATUS|
    AT511242B1|2011-03-31|2013-01-15|Qness Gmbh|TESTER|CN109470586A|2018-12-05|2019-03-15|马鞍山市万鑫铸造有限公司|A kind of heavy casting and forging hardness measuring device|
    CN106124300B|2016-08-09|2019-01-18|浙江江山福鑫工艺品有限公司|A kind of five gold bar rigidity detection devices|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50413/2014A|AT515288B1|2014-06-13|2014-06-13|DEVICE FOR PRODUCING AN IMPRESSION|ATA50413/2014A| AT515288B1|2014-06-13|2014-06-13|DEVICE FOR PRODUCING AN IMPRESSION|
    DE102015106277.1A| DE102015106277A1|2014-06-13|2015-04-23|Device for producing an impression|
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