• 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 temperature stabilizing device (100) for a mechanical piece machined with machine tools comprising: at least one chamber (2) with thermally-insulated walls (5); at least one thermal imaging camera (3) adapted to acquire an image of a piece (7) inserted in said chamber; at least one nozzle (8) connected to an air source, preferably dry, to inject air, preferably dry, into the chamber (2) to vary the temperature of the worked piece (7), inside the said chamber ( 2); at least one heating means of the air to be introduced into said chamber (2); at least one air coolant to be introduced into said chamber (2); means for adjusting the temperature of the air entering the said chamber (2).
    公开号:CH711227A1
    申请号:CH00879/15
    申请日:2015-06-19
    公开日:2016-12-30
    发明作者:Vago Fabio；Vago Gianluca
    申请人:Fanag Sas Di Vago Veronelli Daniela；
    IPC主号:
    专利说明:

    Field of invention
    [0001] The present invention relates to the field of quality control of the machined mechanical parts of machine tools. In particular, the present invention relates to a temperature stabilizing device.
    Known technique
    [0002] Current workings on machine tools require increasingly high precision, with tolerances that can reach below one hundredth.
    [0003] The Applicant has observed that at present, in order to reach accuracies reaching the hundredth, the pieces are machined to the machine tool, according to a predetermined sequence of operations to be performed to obtain the desired piece, to the desired extent.
    [0004] To be measured, with three-dimensional measuring machines, the piece should have a temperature of 20 ° C and for this reason, normally, at the end of the processing it is left in a thermally isolated room, until it reaches the temperature of 20 ° C.
    [0005] Waiting until the aforementioned temperature is reached may take some time, even days, depending on the type of piece, its material, its dimensions and thickness. During this wait, production should be stopped.
    [0006] Once the 20 ° C temperature has been reached, the piece can be subjected to measurement, with the appropriate three-dimensional measuring machines, and if the required tolerances are reached, the production of the batch, of which the piece measured is part, can restart and be completed.
    [0007] If instead, during the measurement it emerges that the piece had not reached the required tolerance, the sequence of operations and the programming to the machine tools must be modified, the piece must be re-worked with the new programming, left to rest at In order to reach the required temperature of 20 ° C and finally measured, all this should be done by keeping production at a standstill.
    [0008] If the part has not yet reached the required tolerance, the procedure described above must be repeated.
    [0009] The Applicant has therefore observed that the devices and methods of measurement of the pieces worked on machine tools, currently used, involve a high loss of time and too long production stops with consequent impacts on production economies.
    [0010] The Applicant has also observed that in order to try to solve the aforementioned problems, the worked piece can be measured at the temperature at which it is at the end of the processing, without having therefore reached the required temperature of 20 ° C. In this case, the definitive tolerance that the piece processed will be estimated with appropriate tables which, depending on the type of material, provide the thermal expansion of the piece.
    [0011] The Applicant has however observed that in this way the measurements of the piece are only estimated and not real and for this reason they may not correspond to the definitive ones precisely because the tables above do not take into account the measurements, thicknesses and shape of the worked piece.
    [0012] Important measurement errors can be transformed into considerable time losses due to reworking of the entire batch or, if the error cannot be remedied, in the rejection of the product batch.
    [0013] The Applicant has therefore found the need to solve the aforementioned problems by proposing a temperature stabilizing device.
    Summary of the invention
    [0014] Therefore, in a first aspect of the invention the invention relates to a temperature stabilizing device for a mechanical piece machined with machine tools comprising:at least one room with walls;at least one thermal imager adapted to acquire an image of a piece inserted in said chamber and / or at least one nozzle connected to a source of dry air, in order to introduce air inside the chamber to vary the temperature of the workpiece, inside of the said chamber;at least one heating means of the air to be introduced into said chamber;at least one air coolant to be introduced into said chamber;means for adjusting the temperature of the air entering the said chamber.
    [0015] The present invention, in the aforementioned aspect, can have at least one of the preferred characteristics which are described below.
    [0016] Preferably, the said chamber priests are thermally insulated.
    [0017] Advantageously, the said at least one nozzle is connected to a dry air source, in order to introduce dry air inside the chamber so as to vary the temperature of the piece being worked, inside the chamber.
    [0018] The temperature stabilizing device comprises at least one temperature sensor suitable for detecting the temperature of the piece inside the chamber.
    [0019] Preferably, the temperature sensor is a contact temperature sensor. Conveniently, the temperature stabilizing device comprises a plurality of nozzles connected to a source of dry air to introduce dry air at a given temperature inside the chamber.
    [0020] Preferably, the said at least one nozzle is mounted on a rotatable support element. Alternatively, the nozzles of the plurality of nozzles are arranged along at least one vertical row.
    [0021] Still alternatively, the plurality of nozzles is arranged in the side walls of said chamber.
    [0022] Conveniently, a rotating piece support device can be provided inside the chamber.
    [0023] Preferably, a support is provided for the thermal imaging camera suitable for rotating the thermal camera around the workpiece.
    [0024] Further characteristics and advantages of the invention will appear more clearly from the detailed description of some preferred but not exclusive embodiments of a temperature stabilizing device for a workpiece machined according to the present invention.
    Brief description of the drawings
    [0025] Further characteristics and advantages of the invention will appear more clearly from the detailed description of some preferred but not exclusive embodiments of a temperature stabilizing device for a workpiece machined according to the present invention.
    [0026] This description will be set forth below with reference to the accompanying drawings, provided for indicative purposes only and, therefore, without limitation, in which:<tb> Fig. 1 <SEP> shows a schematic perspective view of a first embodiment of a temperature stabilizing device for a mechanical piece machined to machine tools according to the present invention;fig. 2 <SEP> is an internal schematic view of the chamber of the temperature stabilizing device of Fig. 1;fig. 3 <SEP> is an internal schematic view of the chamber of a second embodiment of a temperature stabilizing device for a mechanical piece machined to machine tools according to the present invention; isfig. 4 <SEP> is an internal schematic view of the chamber of a third embodiment of a temperature stabilizing device for a mechanical piece machined to the machine tools according to the present invention.
    Detailed description of embodiments of the invention
    [0027] With reference to the figures, a temperature stabilizing device for a workpiece machined to the machine tools, according to the present invention, is identified with the reference number 100.
    [0028] The temperature stabilizing device 100, as shown in figs. 1 - 4 comprises a chamber 2 provided with walls 5, preferably thermally insulated and an opening closed by an access door 16 which can be opened to allow insertion or removal of the worked piece 7 inside the chamber 2.
    [0029] By way of example, with reference to the embodiments shown in figs. 1-4, the chamber 2 is in the form of a parallelepiped and the access door 16 is located on the top wall 5 of the chamber 2.
    [0030] The chamber 2 could however have other shapes and the door 16 could be arranged in a different wall of the chamber 2 without leaving the scope of protection of the present invention.
    [0031] The walls of the chamber 2 are thermally insulated walls, and for this purpose according to the embodiment shown in the figure, the chamber 2 is constituted by double walls so as to provide an empty gap of suitable width.
    [0032] The walls could in any case be insulated differently, for example they could be double walls with one or more layers of insulating material interposed or they could be simple walls wrapped with insulating material or the walls could be made of insulating material.
    [0033] The camera internally provides a thermal imager 3 adapted to acquire a thermal image of a piece inserted in the chamber 2. The thermal imager 3 is preferably a high-resolution thermal imaging camera which realizes a means of detection or thermal identification capable of producing on a its output terminal a radiometric image, that is to say characterized by a plurality of colors each representing a specific absolute temperature.
    [0034] For this purpose the thermal imager 3 comprising or being electrically connected to at least one data processing unit capable of receiving at least one thermographic image. The camera is oriented inside the chamber 2 so as to have the objective framing the piece worked inside the chamber 2.
    [0035] Alternatively, the thermal imaging camera can be mounted on a support able to rotate the thermal imaging camera 3 around the workpiece 7.
    [0036] The thermographic image acquired by the thermal imager 3 is able to represent figures according to a chromatic scale preferentially defined though not limitedly between a first minimum temperature value corresponding to a blue color up to a second maximum temperature value corresponding to a red color . Several thermal cameras can also be provided without departing from the scope of protection of the present invention.
    [0037] Inside the chamber 2 there is also provided at least one nozzle for introducing air, preferably dry, into the chamber.
    [0038] With reference to the embodiments shown in the figures, a plurality of nozzles are present, the nozzles are joined to a circuit for introducing air preferably dry in temperature inside the chambers to bring the piece to the temperature of 20 ° C required for subsequent measurements.
    [0039] Preferably, the nozzles are of the divergent convergent type, but other types of nozzles could be provided without departing from the scope of protection of the present invention. For this purpose, the circuit comprises at least one source of air, preferably dry, such as a compressor, at least one filter, at least one means for heating the dry air entering the chamber 2, at least one means for cooling the dry air and means for controlling the flow and temperature of the dry air entering the chamber 2.
    [0040] The means for heating and cooling can also be a single means capable of heating to cool the dry air circulating in the circuit before being introduced into the chamber according to the needs.
    [0041] Still with reference to the embodiment shown in the figures, the chamber has at least one temperature sensor able to detect the temperature of the piece inside said chamber.
    [0042] Advantageously, to accurately detect the temperature of the piece, the temperature sensor can be a contact temperature sensor.
    [0043] The temperature sensor supplies the exact temperature of the piece at a certain point and can be used to determine with the help of the thermal image detected by the thermal camera to establish the temperature of each point.
    [0044] According to a first embodiment shown in fig. 2, the plurality of nozzles is mounted on a rotatable support element, preferably circular, able to rotate around the worked piece once inserted in the chamber 2.
    [0045] For this purpose, the support element comprises a rotatable frame connected to actuators adapted to rotate the frame.
    [0046] According to an alternative embodiment, nozzles of the plurality of nozzles are arranged in the side walls of the chamber, so as to encircle the worked piece.
    [0047] For each side wall of the chamber, more than one nozzle can be provided, or it is possible to provide side walls without nozzles.
    [0048] The nozzles arranged in a side wall can be arranged at the same vertical height or at different heights.
    [0049] According to another embodiment, the nozzles of the plurality of nozzles are arranged along at least one vertical row.
    [0050] For this purpose the nozzles can be integral with a wall of the chambers, housed in special seats arranged in a wall of the chamber or arranged on a frame which extends vertically inside the chamber.
    [0051] In this case, to allow the dry air flow at a given temperature to homogeneously invest the workpiece, preferably the latter is placed on a rotating support so that substantially every face of the piece periodically faces the air flow , preferably dry.
    [0052] The advantages of the temperature stabilizing device for a mechanical piece worked on the machine tools according to the present invention are innumerable, in fact it is possible to bring the machined piece to the required temperature for a very rapid time, considerably reducing the processing times of the whole lot.
    [0053] The temperature stabilizer device makes it possible to avoid the use of forecast tables for thermal expansion, avoiding the possible measurement errors connected to these operations and consequently avoiding production waste due to this type of measurement error.
    [0054] Various modifications can be made to the embodiments described in detail, while remaining within the scope of protection of the invention, defined by the following claims.
    权利要求:
    Claims (10)
    [1]
    1. Temperature stabilizing device (100) for a mechanical piece machined with machine tools comprising:- at least one chamber (2) comprising walls (5);- at least one thermal imaging camera (3) adapted to acquire an image of a piece (7) inserted in said chamber (2);- at least one nozzle (8) connected to an air source (9), to introduce air inside the chamber (2) so as to vary the temperature of the worked piece (7), inside the said chamber (2 );- at least one heating means (11) of the air to be introduced into the said chamber (2);- at least one cooling medium (12) of the air to be introduced into the said chamber (2);- regulation means (13) of the temperature of the air entering the said chamber (2).
    [2]
    2. Stabilizer device (100) according to claim 1, characterized in that said walls (5) of said at least one chamber (2) are thermally insulated.
    [3]
    3. Stabilizer device (100) according to claim 1, characterized in that said at least one nozzle (8) is connected to a dry air source (9) so as to introduce dry air into the chamber (2) to vary the temperature of the worked piece (7), inside the said chamber (2).
    [4]
    4. Stabilizer device (100) according to claim 1, characterized in that it comprises at least one temperature sensor (4) able to detect the temperature of the piece (7) inside said chamber (2).
    [5]
    5. Stabilizer device (100) according to claim 1, characterized in that it comprises a plurality of nozzles connected to an air source (9) to introduce air at a given temperature inside said chamber (2).
    [6]
    6. Stabilizer device (100) according to claim 1, characterized in that it comprises at least one nozzle mounted on a rotatable support element (14).
    [7]
    7. Stabilizer device (100) according to claim 5, characterized in that the nozzles (8) of said plurality of nozzles are arranged along at least one vertical row.
    [8]
    8. Stabilizer device (100) according to claim 5, characterized in that the plurality of nozzles is arranged in the side walls (5) of said chamber (2).
    [9]
    9. Stabilizer device (100) according to claim 1, characterized in that it comprises a rotating piece support device (15).
    [10]
    10. Stabilizer device (100) according to claim 1, characterized in that it comprises a support for the said at least one thermal imaging camera (3) able to rotate the said thermal camera around the worked piece (7).
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    同族专利:
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    引用文献:
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    US2221127A|1938-07-27|1940-11-12|Westinghouse Electric & Mfg Co|Temperature control means for gear cutting|
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    CN1949116A|2005-10-10|2007-04-18|中国科学院安徽光学精密机械研究所|Closed double crystal adjustable temp. controlling box|
    JP2011152629A|2010-01-28|2011-08-11|Toshiba Mach Co Ltd|Temperature control device for precision machining machine|
    CN203404904U|2013-07-22|2014-01-22|爱彼思（苏州）自动化科技有限公司|Temperature control system for chromatic aberration analysis equipment|
    法律状态:
    2019-04-30| PCAR| Change of the address of the representative|Free format text: NEW ADDRESS: PIAZZETTA SAN CARLO 2, 6900 LUGANO (CH) |
    优先权:
    申请号 | 申请日 | 专利标题
    CH00879/15A|CH711227B1|2015-06-19|2015-06-19|Temperature stabilizer device.|CH00879/15A| CH711227B1|2015-06-19|2015-06-19|Temperature stabilizer device.|
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