• 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:
    meter device. the present invention relates to a measuring device (2) according to the invention for measuring during processing of tested parts during a machining process in a machining machine, especially a sander (4), has a basic body (18) and a measuring head (12) which can be moved between an inactive position and a measuring position and which is joined to the basic body (18) through the clamp (14), configured and prepared in such a way that the measuring head (12) in the measuring position, it follows the orbital turns of the tested part around a rotation axis, and the measuring head (12) has a measuring sensor (36) articulated along a linear axis to receive measured values during a measuring process and a control set (80) for the control of the measuring process is provided. according to the invention the control assembly (80) is shaped and prepared in such a way that the measuring device (2) can be calibrated in a calibration mode.
    公开号:BR102013024131B1
    申请号:R102013024131-8
    申请日:2013-09-20
    公开日:2021-09-08
    发明作者:Jörg Seewig
    申请人:Jenoptik Industrial Metrology Germany Gmbh；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a measuring device of the kind mentioned in the preamble of claim 1 for measuring during processing on test pieces during a finishing process in a machining machine especially a sander.
    [0002] In the production of crankshafts, it is necessary to sand the crankshaft pins in a sander to a specific size. To ensure that the sanding process is finished, as soon as a desired measurement has been reached, it is necessary to test the crank pin during a measurement process running during the machining process, especially with respect to its diameter and its state of rounded. European patent EP-A-0859689 discloses a measuring device in this regard.
    [0003] Through the European patent EP-A-1370391 it became known a measuring device that serves for measurement during the processing of crank pins during a sanding process in a sander. The known measuring device features a sanding head which through a brace and a first pivot axis is pivotally joined with a basic body of the measuring device. The known measuring device also has means for rotating the measuring head towards and opening towards a measuring position, i.e. from a measuring position. To perform a measurement during processing on a crank pin, the measuring head will be rotated through the means provided for this to a measurement position, in which the measuring head, for example, presents through a measuring prism, comes to rest up to the crank pin to be measured. During the sanding process, the crankpin makes an orbital turn around the crankshaft slew axis. In this case, the sanding disc maintains contact with the crank pin and is therefore mounted with mobility in a radial direction towards the crankshaft's swivel axis. To ensure that during the sanding process measurements can be taken on the crankpin, the gauge head completes the crankpin movements sequentially. For this purpose, the basic body of the measuring device is joined with a basic body of the sander so that the measuring device during the sanding process, in the radial direction of the crankshaft, is moved in synchronism with the sanding disc of the sander. Similar sanding devices are also known from document DE 2009/052254 A1 and from document DE 2010 013 069 A1.
    [0004] By European patent EP 1 253 547 B1 a measuring device of the species in question became known for measuring during processing on parts worked during a machining process in a machining machine that has a basic body and a measuring head which can be moved between an inactive position and a measuring position and is joined with the basic body through a clamping, configured and ready in such a way that the measuring head in the measuring position follows orbital turns of the tested part around a rotating axis , where the measuring head features a measuring sensor that can be offset along a linear axis and is intended to record measurement values during a measurement process. The measuring device known from the publication also features a measuring process control assembly, whereby the measuring device for measuring the diameter of the round state of a crankshaft crank pin is provided during a machining process on a sander.
    [0005] The invention is based on the task to indicate a sander of the kind mentioned in the preamble of claim 1 which, regarding its measurement accuracy and reliability, is improved.
    [0006] This task will be solved by the invention indicated in claim 1.
    [0007] In the known measuring device, during a relative rotation of the test piece, for example, crank pins will be registered relative to the measuring head measurement values, on the basis of which the component contour will be reconstructed through calculations. The reconstruction can be done through an iterative process as is known from document DE 2009 032 353 A1. The reconstruction can, however, also be carried out on the basis of a Fourier analysis, as known from European patent EP 1 263 547. Regardless of the respective reconstruction process used, the geometric relationships of the measuring device, for example, and especially with regard to the shape of a measuring prism of the measuring head and the arrangement of the measuring head relative to the tested part are integrated in the rebuild. In the known measuring device, i.e. in the known method for operating a measuring device of this type, the geometric relationships of the measuring device will be considered as realized with the precision of the tolerances of the component of construction used.
    [0008] The invention is based on the recognition that deviations from the effective geometric relationships of the accepted geometric relationships have a sensitive effect on the measurement accuracy of the measuring device. Based on this recognition, the invention aims to take into account these deviations from geometric relationships that result from tolerances of construction components, as well as a wear of the component of the measuring device that can be produced, being taken into account in the evaluation, that is, in rebuilding.
    [0009] Therefore, the invention provides that the control set is so shaped and prepared that the measuring device can be calibrated in a calibration mode. According to the invention, therefore, the geometric relations of the measuring device will no longer be considered as effective, but the effective geometric relations will be taken into account by the calibration of the measuring device in the evaluation, that is, in the reconstruction of the construction component contour. As deviations from the accepted geometric ratios from the actual geometric ratios sensitively influence the measurement accuracy, resulting in a measurement failure, according to the invention the measurement accuracy of the measuring device according to the invention is increased.
    [00010] In the calibration carried out according to the invention, not only deviations, produced by tolerances of the constructed component, in relation to the desired geometry of the measuring device, but also those deviations resulting from wear will be taken into account, this is especially of great importance because in these measuring devices, for example, a measuring prism of the measuring head in the movement from the idle position to the measuring position is positioned with considerable forces on the tested part, so that a wear is preprogrammed. Also, deviations from the desired geometry that result from a kinematics resulting from the wear of the clamp that connects the measuring head with the basic body and which will be registered through the calibration according to the invention and can therefore no longer impair the measurement accuracy. According to the invention, the calibration can advantageously be carried out at predetermined time distances or after measuring a certain number of test pieces. However, according to the invention it is also possible to carry out the calibration only if necessary, or before or after each measurement process.
    [00011] An advantageous extension of the invention provides that the control set for switching the measuring device between a measurement mode in which a measuring process can be performed, and a calibration process, in which a calibration process can be performed, it is conformed and prepared. Switching between measuring mode and calibration mode can in this case be initiated semi-automatically, for example by an operator, or fully automatic, for example, before machining a test piece.
    [00012] An extraordinarily advantageous modality of the invention provides that the measuring head has a measuring prism with an opening angle α (first angle) and an axis of symmetry, with the alignment of the linear axis of the meter sensor being provided with respect to the axis of symmetry of the measuring prism by a second angle β and the calibration being carried out with respect to the first angle α and/or the second angle β. By calibrating the measuring device with respect to the first angle and/or the second angle, the risk of inaccuracies in the measurement caused by deviations from the accepted geometric ratios compared to the actual geometric ratios of the measuring device is lower, because both built-in component tolerances and also Geometric deviations caused by wear can be registered by calibrating against the first angle and the second angle. If there is a change resulting from the wear of the prism opening angle in the front base, according to the invention it may be sufficient to carry out a calibration exclusively with respect to the first angle α, if, on the contrary, a change in the kinematics is in the foreground. , caused by tolerances of the constructed component or by wear, kinematics is related to the bracing that interconnects the measuring head with the basic body, so, according to the invention, a calibration with respect to angle β may be sufficient. And ideally the calibration takes place, however, with respect to the first angle α and the second to angle β.
    [00013] Another advantageous extension of the invention provides that the control set has a memory in which, during a calibration process, the obtained calibration data can be memorized, said memory being in connection with an evaluation set in a data transmission system or it can be so linked to take calibration data into account when evaluating measurement data obtained during a measurement process. In these embodiments the calibration data obtained during calibration will be recorded in a manner that can be used in evaluating the measurement and correlated contour reconstruction of the constructed component, especially with respect to diameter and roundness.
    [00014] Another advantageous modality of the invention provides that the calibration is done using the normal round base.
    [00015] In this case, the normal round base according to the invention can be modified in such a way that a calibration can be carried out especially with respect to the first angle α and the second angle β. For this purpose, an advantageous extension of the invention provides that the calibration is carried out using a cylinder, which in the circumferential area, and at least one point has a flat section with a predetermined expansion.
    [00016] An especially simple calibration results when the calibration is carried out using a sanding cylinder as this is provided for by another advantageous extension of the invention. A sanding cylinder consists of a cylinder which (relative to its possibly ideal circular contour) which at a circumferential point presents a flat section with a predetermined length.
    [00017] A method according to the invention for operating a measuring device provided for measuring during processing on test pieces during machining on a machining machine, especially a sander, is indicated in claim 8. In the process according to invention the measuring device by means of the control set will be put into a calibration operational mode and perform the calibration. In this way the same advantages result as in the measuring device according to the invention. Corresponding data are also valid for the extensions of the method according to the invention indicated in claims 9 to 14, which are advantageous and convenient. The method according to the invention serves in particular for operating a measuring device according to one of claims 1 to 7.
    [00018] In the following, the invention was explained in more detail in the form of an attached drawing, markedly schematic, which presents an example of implementation of a measuring device according to the invention. In this case, all the characteristics described, presented in the drawing and claimed in the claims, per se, as well as in random combination with each other form the object of the invention, regardless of their junction in the patent claims and their cross references as well as independent of their description, that is, presentation in the drawing.
    [00019] The figures show:
    [00020] Figure 1 - in sharply schematic presentation a side view of an example of an execution of a measuring device according to the invention in an inactive position of the measuring head.
    [00021] Figure 2A to 2E - the measuring device according to Figure 1 in differentiated kinematic phases.
    [00022] Figure 3 - in identical presentation as in Figure 1 the example of execution according to Figure 1 during the movement of the measuring head in the measurement position
    [00023] Figure 4 - a block diagram presentation of the components of the measuring device according to Figure 1.
    [00024] Figure 5 - view of a measuring prism of a measuring device according to Figure 1 of a measuring prism of the measuring device according to Figure 1 in combination with a cylinder with sanding to demonstrate the geometric and
    [00025] Figure 6 - the path of the distance function in the calibration of the measuring device according to Figure 1 using a sanding cylinder.
    [00026] Figure 1 shows an example of execution of a measuring device 2 according to the invention that serves for measurement during the process on parts tested during the machining process on a sander 4. The sander 4 which for reasons of simplification is shown only partially, it has a sanding disc 8 swivelable around a fixed slewing axis 6 of the machine for machining a test piece which in this example embodiment is formed by a crank pin 10 of a crankshaft.
    [00027] The measuring device 2 has a measuring head 2 that through a clamp 14 is rotatable around a first axis and rotation 16 being united with a basic body 18 of the measuring device 2.
    [00028] In addition, the measuring device 2 presents means to rotate in the input direction and in the output direction of the measuring head 2 to a measuring position or from a measuring position which will be explained in more detail later.
    [00029] Additionally, based on Figure 2a, the constitution of the bracing will be explained in more detail. to the measuring position, ie from the measuring position. The clamp 18 has a first clamping element 20 and a second clamping element 22 pivotally arranged around the first pivoting axis 16. With the end spaced apart from the first pivoting axis 16 of the second pivoting element 22, it is pivotally joined. around a second pivoting axis 24 a third clamping element 26, with whose side remote from the second pivoting axis 24, a third pivoting axis 22 is rotatably joined with a fourth clamping element which, distant from the third, slewing axis 28, is pivotally joined around a fourth slewing axis with the first element and clamping 20.
    [00030] In the example of embodiment shown, the first clamping element 20 and the third clamping element 26 are reciprocally arranged in a non-parallel way, with the distance between the first pivot axis 16 and the second pivot axis 24 being smaller than the distance between the third turning axis 28 and the fourth turning axis 32.
    [00031] In the example of embodiment shown, the second clamping element 22 has a lever arm 34 in such a way that this lever arm 34 together with the clamping element 22 comprise a two-arm angle lever whose function will be later on. explained in more detail.
    [00032] In this example of execution, the measuring head 2 is arranged on a retaining arm 35 which is joined with the fourth clamping element 30 which is extended beyond the fourth turning axis 32. In the example of the embodiment shown, the connection between the retaining arm 34 and the fourth clamping element 30 is rigid shaped. As can be seen in Figure 2a in the example of embodiment shown, a free end of the retainer arm 34 which retains the measuring head 12, is angular in the direction of the first pivot axis 16, a part of the retainer component 34 being joined with the fourth clamping element 30 forms with the fourth clamping element 30 an angle greater than 90°.
    [00033] In the example of execution presented, the measuring head 12 has a measuring sensor 36 that can be articulated in a linear direction along a linear axis, which sensor in Figure 2a is indicated by a dashed line. The measuring head 12 also has a measuring prism 38 in the example of execution shown. The way and how, through an arrangement consisting of a measuring key 36 that can be articulated in a linear sense and a measuring prism 38, circularity and/or measurements can be carried out. of dimensions on a test piece, especially a crank pin of a crankshaft or other cylindrical component, is already generally known to the expert and therefore will not be explained in more detail here.
    [00034] In addition, the measuring device 2 has means to move the measuring head 2 from an inactive position to a measuring position, which in this example of execution has means to rotate in the input and output direction of the measuring head 12 that act in bracing 14 and based on Figure 1 will be explained in more detail. In the example of embodiment shown, the means for rotating in the inlet and outlet direction of the measuring head 12 has an inlet rotating device 40 and a separate outlet rotating device 42.
    [00035] In the example of execution shown, the inlet swivel device 40 has molar means which in this example of execution has the spring 44 shaped as a pressure spring that holds the measuring head 12 through the brace 14 in a direction of rotation of entry symbolized in Figure 1 by an arrow 46. The spring 44 in this example of embodiment is shaped as a pressure spring and rests at one end on the basic body 18 of the measuring device 2 and at its other end on the lever arm 34 of the manner in which spring 44 holds and seeks to move lever arm 34 in Figure 1 counterclockwise and therefore seeks to move meter head 12 through arm 4 in the direction of inlet rotation 46.
    [00036] In this example of execution, the output slewing device 42 has a hydraulic cylinder 48 whose piston at its free end is joined with the basic body 18 of the metering device 2. With the piston rod 50 of the hydraulic cylinder 48 it is joined a lever assembly 42 in this example of embodiment shaped as a knee lever whose free end spaced apart from the piston rod 50, in the direction of the first pivot axis 16, is eccentrically joined with a single-arm lever 54, mounted coaxially with respect to the pivot axis 16. The lever 54 has at its free end a pin 56 which projects within the drawn plane and which loosely holds the first clamping element 20, so that the lever 54 when moving in a direction of rotation output, which corresponds in the drawing to the clockwise movement, acts as a drag for the first element of the arm 20.
    [00037] To explore the respective position of the measuring head 12, sensor means are provided which are in active connection with control means of the input turning device 40 and the output turning device 42.
    [00038] The evaluation of measurement values that were recorded during the measuring sensor 36 during a measurement process is verified through an evaluation set. The manner and manner in which corresponding measurement values are evaluated is generally known to the person skilled in the art and will therefore not be explained in more detail here.
    [00039] In a measurement mode, the operating mode of the measuring device according to the invention 2 is as follows:
    [00040] In the inactive position shown in Figure 1 and Figure 2a, the measuring head 12 is out of mesh with the crank pin 10. In this inactive position the hydraulic cylinder 48 is paralyzed so that the movement of the arm is blocked. lever 34 in its counterclockwise position in Figure 1 which the pressure spring 44 seeks to produce.
    [00041] For the inlet rotation of the measuring head 12 in the inlet rotation direction 46, the hydraulic cylinder 48 will be activated in such a way that its piston rod 50 in Figure 1 moves to the right side. At the exit of the piston rod 50, spring 44 presses against lever arm 34 so that lever arm 34 is rotated in Figure 2 counterclockwise. As the lever arm 34 is pivotally joined with the second bracket element 22, the second bracket element 22 and with it the entire bracket 14 in Figure 2 will in this case be rotated counterclockwise.
    [00042] Figure 2b shows the measuring head 12 in a position between the idle position and the measuring position.
    [00043] Upon reaching a predetermined angle position, shown in Figure 2C, the lever arm 34 encounters a stop 57, whereby at the meeting of the lever arm 34 at the stop 57 a control signal is transmitted to the means of control based on which the hydraulic cylinder 48 will be stopped. Figure 2C shows meter head 12 in a search position where it is not yet in contact with crank pin 10.
    [00044] Figure 2D shows the measuring head 2 in its measurement position, in which it is in contact with the crank pin 10.
    [00045] Figure 2E corresponds to Figure 2C, and the measuring head 12 is shown in its search position with respect to a larger diameter 10' crank pin.
    [00046] Figure 3 shows the measuring device 2 in the search position of the measuring head 12, which is also shown in Figure 2C. As a result of a comparison of Figure 1 with Figure 3, the lever 54 will be rotated at the output of the piston rod 50 of the hydraulic cylinder 48, in Figure 1, counterclockwise, until the position of angle of the lever 54, shown in Figure 3. As can be seen from Figure 3, in this angle position the pin 56 is spaced in the circumferential direction of the first pivot axis 16 with respect to the first clamping element 20, so that the first clamping element 20 and with it the complete clamping 14, under the effect of the action of the weight of the measuring head 12, including the retaining arm 34 and the pressure force exerted by the spring 14, can move freely. In the measuring position (compare Figure 2D) the gauge head 12 touches the crank pin 10, with the gauge head making orbital turns of the crank pin 10 around the crankshaft during the sanding process. For this purpose, the basic body 18 of the metering device 2 is fitted with a slip-proof connection with a sanding disc 8 retainer so that the metering device 2 follows and performs translational movements of the sanding disc 8 in the radial direction of the rotating axis 6 .
    [00047] During contact of the measuring head 12 with the crank pin 10, the measuring sensor 35 records measurement values, based on which in the evaluation computer sequential to the measuring sensor 36 can be evaluated the roundness and/or the diameter of the pin of crank. If, for example, a certain diameter measurement has been reached, then the sanding disc 8 will be moved away from the crank pin 10.
    [00048] In order to rotate out the gauge head 12 after the completion of the measurement, contrary to the input turning direction 46, the control assembly will control the hydraulic cylinder 48 in such a way that its piston rod 50 in Figure 3 moves to the left side. In this case, the lever 54, through the lever assembly 42 in Figure 3, will be rotated clockwise. While the roller 56 is spaced in the circumferential direction of the first pivot axis 16 relative to the first clamping element 20, the measuring head 20 initially remains in the measuring position. By reaching roller 56 with a further clockwise rotation of lever 54 in the Figure and a clockwise abutment position on the first arm member 20, then lever 54 will function in another clockwise rotation as a drag and drag , therefore the first clamping element 20 and therefore the entire clamping 14 in a clockwise direction so that the measuring head will be rotated in the output direction opposite the input rotation direction 46 until the inactive position has been reached, shown in Figure 1.
    [00049] During the measurement process itself, the measuring head is moved in the circumferential direction of the crank pin 10 with an angle stroke that in the example of execution shown is about -7° and +5°, that is, when every 12th.
    [00050] Next, based on Figures 5 it will be explained in more detail how a measuring device according to the invention is operated and thus calibrated in a calibration mode through a method according to the invention.
    [00051] Figure 4 shows components in block circuit form of the measuring device 2, according to the invention that are used in the calibration, and can thus be switched.
    [00052] The measuring device 2 according to the invention has a control assembly 80 that is shaped and prepared in such a way that the measuring device 2 can be performed between the measurement mode, in which a measurement process can be performed, and the calibration mode, in which a calibration process can be carried out, and thus switchable. The control set 80 is also shaped and prepared so that the measuring device can be calibrated in a calibration mode.
    [00053] During a measurement process the measuring sensor 36 continuously records measurement values which are fed to an evaluation Ed 82 set, which based on the measured values reconstructs the profile of the tested part. The reconstruction can be done especially through an iterative process according to the document DE 10 2009 032 353. The reconstruction can, however, also be done in a Fourier analysis in a manner corresponding to the European patent EP 1 263 547 B1.
    [00054] To calibrate the measuring device 2 according to the invention, the control set 80 performs the switching of the measuring device 2 from the measurement mode to the calibration mode. In the calibration mode, the calibration of the measuring device 2 will be carried out and this in the example of execution presented with the use of a so-called sanding cylinder as further will be explained in more detail with respect to Figure to Figure 5. In the calibration mode it will initially be applied a sanding drum to which a rotary drive 84 is allocated so that the sanding drum can be rotated relative to the measuring head 12.
    [00055] In addition, the control assembly 80 controls the input turning device 40 in such a way that the measuring head 12 is turned in the input direction and the measuring prism 38 and the measuring sensor 38 are brought into contact with the cylinder with sanding. Then, the control assembly 80 controls the rotary drive 84 of said sanding cylinder in such a way that it rotates relative to the measuring sensor 36.
    [00056] During the rotation of the cylinder with sanding relative to the sensor gauge 36, this carries out the tracking of the cylinder with sanding. The measured values thus obtained form the calibration data on the basis of which, in a form which will be explained in more detail below, a calibration of the measuring device will be carried out. The calibration data will be memorized in a memory 86 of the control set 80 which is in data transmission connection with the evaluator set 82. After obtaining the calibration data, the control set 82 switches the measuring device 2 again. back to measurement mode. To do this, the output turning device 42 will be activated which then moves the measuring head 12 from the measuring position back to the inactive position. In addition, the rotary drive 84 will be stopped so that the sanding cylinder will be stretched and can be fixed to carry out a measurement process on a part to be tested in this unit.
    [00057] The calibration data that have been made available for the evaluation set 82 will be - in the subsequent measuring process, taken into account for the calibration of the measuring device 2. The calibration of the measuring device 2 can be done if necessary and/or after the predetermined number of measurement processes and/or after a predetermined operating time span can be taken from the measuring device 2.
    [00058] Calibration will be explained in more detail below with reference to Figure 5.
    [00059] Figure 5 shows a sharply schematic view of the measuring prism 38 together with a sanding cylinder 88.
    [00060] The sanding cylinder 88 is, in the manner already generally known to the expert, an ideal cylinder relative to the circular shape of its contour which at a circumferential point 90 presents a flattening with a predetermined expansion (depth) PT . Figure 5 serves to show the geometric relationships that result when the measuring prism 38 is abutted against said sanding cylinder 88, the linear axis in the measuring sensor 36 in Figure 5 being designated with reference number 92.
    [00061] In Figure 5 this opening angle of the measuring prism 38α (first angle) can be recognized. Furthermore, it can be recognized that the sanding cylinder 88 is at two contact points 94, 96 with the measuring prism 38 while the measuring sensor 36 at an intermediate contact point in the circumferential direction of the sanding cylinder 88 is located in contact with the sanding cylinder 88. The symmetry axis of the measuring prism 38 is symbolized in Figure 5 by a line 100 of dashes and dots and forms for subsequent analysis the y-axis of a right-handed Cartesian coordinate system. The linear axis of the gauge sensor 36 extends over an angle β (second angle) in the direction of the x axis of this coordinate system. The result shows that the constellation shown in Figure 5 shows three contact points 94, 96, 98 between the sanding cylinder 88 and the measuring device 2.
    [00062] The contour of the construction component either for subsequent consideration is described by the polar coordinates Φ and R(Φ) being described in the constructed component coordinate system. The gauge sensor 36 records the distance A (Φ) in dependence on the turning angle Φ of the component constructed in the gauge prism 38. Correspondingly, roundness deviations result in a characteristic distance function (sensor gauge deflection 36) A (Φ ). In a mathematical sense, the following connection will result between the contour of the constructed component depending on angle R (Φ) and the distance function A (Φ) (1.1)
    with α - first angle β - second angle Φ - angle of rotation in the constructed part R (Φ) radius of the constructed component (contour of the constructed component) depending on the angle of rotation A (Φ) distance function
    [00063] In the measurement mode, the purpose of the evaluation, that is, the reconstruction performed in the evaluation set 82 lies in reconstructing, through calculations, the constructed component contour R (Φ) from the distance function A (Φ) . It is common to known reconstruction processes that the angles α and β need to be known for the reconstruction. Deviations of the actual values of angles α and β from acquired values of these angles result in measurement inaccuracies which are avoided by the calibration carried out in accordance with the invention.
    [00064] If the cylinder with sanding 88 in those regions where its contour is limited in a circular shape, has radius R0 then the smallest radius of the constructed component R0 - will be Pt if it is presented at angle Φ. In this case it is basically established that the flattening of the cylinder with sanding only has one point of contact with the measuring device 2, but this can be guaranteed without problems by a corresponding dimensioning of the flattened section 90.
    [00065] If the sanding cylinder is rotated 360°, then the functional path shown in Figure 6 will result. The transformation norm according to equation (1.1) guarantees that the peaks in Figure 6 have the same shape, although in different amplitudes. Unknown angles can, for example, be determined when local extremes are identified or when an integral evaluation of the distance function is carried out with the aid of the Fourier transform.
    [00066] With the aid of the Fourier transformation, an integral evaluation of the distancing function can be performed as follows:
    [00067] In the manner described above, a measurement will be carried out using the sanding cylinder. The result of this measurement function is the distanced function A (Φ) starting from this point, the median of the distance function can be determined by obtaining an aperiodic function Φ, which can be mathematically decomposed into three partial functions, with each partial function describing the relative motion path always to a contact point.
    [00068] The three partial functions can then be subjected to a Fourier transform. Three Fourier transforms of the partial functions then resulted. From this situation, influences of the ΔR (Φ) format deviation in which the measurement starts can be eliminated, and the two distance functions transformed in the Fourier process that describe the right-hand prism contact and the sinister prism contact are multiplied with the complex Fourier transformation conjugated to that distancing function that describes the contact with the sensor. The result is linear-phase functions whose phase terms contain exclusively unknown α and β. The phase terms produce a straight line through the origin in the phase spectrum. Unknown line increases can be calculated by a compensating line that also traverses the origin. From there, the unknown angles α and β are determined.
    [00069] The real values thus determined of the first angle α and the second angle β can then in the reconstruction of the contour of the construction component be taken into account according to the above equation (1.1) so that the measuring device 2 remains so calibrated.
    [00070] Measurement failures based on a deviation of the actual geometric ratios of the measuring device 2 from the accepted geometric ratios are thus reliably avoided in comparison with the prior art. Therefore, the invention offers, compared to the measured devices of the prior art, an improved measurement accuracy with a relatively low effort.
    [00071] In the Figures of the drawing identical components, that is, corresponding ones have the same reference number. Figures 2A to 2E show a variant with the slightly modified construction of the example embodiment according to Figure 1 and Figure 3, which, however, with respect to the basic principle of the invention, coincides according to Figure 1 and with Figure 3.
    权利要求:
    Claims (12)
    [0001]
    1. Measuring device (2) for measuring during processing of test pieces in a machining process on a machining machine especially a sander, with a basic body (18), with a measuring head (12) that can be moved between a inactive position and a measuring position and which is united with the basic body (18) through a bracing (14) shaped and prepared in such a way that the measuring head (12) in the measurement direction follows orbital turns of the tested part around a rotating axis, with the measuring head (12) having an articulated measuring sensor (36) along a linear axis (92) to record measurement values during a measuring process and with a control set (80) for the control of the measurement process, whereby the measuring device (2) can be calibrated in a calibration mode characterized by the fact that the measuring head (12) has a measuring prism (38) with a first angle, being the opening angle (α), and an axis of symmetry (100), whereby the alignment of the linear axis (92) of the measuring sensor (36) relative to the axis of symmetry of the measuring prism is provided by a second angle (β) and the control assembly (80) being of such a shaped and prepared way that the calibration is carried out in relation to the first angle (α) and/or to the second angle (β).
    [0002]
    2. Measuring device according to claim 1, characterized in that the control assembly (80) is shaped and prepared for a switching of the measuring device (2) between a measurement mode, in which a process of measurement and a calibration mode, in which a calibration process can be performed.
    [0003]
    3. Measuring device according to any one of the preceding claims, characterized in that the control set (80) has a memory (86) in which calibration data, obtained during a calibration process, can be memorized. memory (86) is in data transfer contact with an evaluation assembly (82) or can be brought into contact in this sense to consider calibration data in evaluating measurement data obtained during a measurement process.
    [0004]
    4. Measuring device according to any one of the preceding claims, characterized in that the calibration is done using a circularity standard.
    [0005]
    5. Measuring device according to any one of the preceding claims, characterized in that the calibration occurs through the use of a cylinder in the circumferential direction, in at least one point, presenting a flat section with predetermined extension.
    [0006]
    6. Measuring device according to any one of the preceding claims, characterized in that the calibration takes place through the use of a sanding cylinder (88).
    [0007]
    7. Method for operating a measuring device (2) intended for measuring during a process on test pieces during a machining process on a machining machine, especially a sander, the measuring device having the following: - a basic body (18 ) - a measuring head (12) that can be moved between an inactive position and a measuring position and which is joined with the basic body (18) through a clamp (14) shaped and prepared in such a way that the measuring head (12 ), in the measurement position, follows orbital rotations of the tested part around a rotation axis, and the measuring head (12) has a measuring sensor, articulated along a linear axis (92), intended to record values of measurement during a measurement process and, - a control set (80) being provided for the control of the measurement process, characterized by the fact that the measuring device is put into a calibration mode through a control set (80 ) and is calibrated, using a measuring head (12) with a measuring prism (38) with a first angle, being the opening angle (α) and a symmetry axis (100), and the axis alignment Linear (92) of the measuring sensor (36) is given relative to the axis of symmetry (100) of the measuring prism (38) by a second angle (β), the calibration being carried out with respect to the first angle (α) and/ or to the second angle (β).
    [0008]
    8. Method according to claim 7, characterized in that the measuring device is switched by the control set (80) from a measurement mode in which a measuring process is performed, to the calibration mode, in which a calibration process is performed.
    [0009]
    9. Method according to any one of claims 7 or 8, characterized in that during a calibration process the calibration data obtained will be memorized in a memory (86) of the control set (80), and the memory is in data transmission contact with an evaluation assembly (82) the calibration data being used in evaluating measurement data obtained during a measuring process.
    [0010]
    10. Method according to any one of claims 7 to 9, characterized in that in the calibration of the measuring device a circularity standard is used.
    [0011]
    11. Method according to any one of claims 7 to 10, characterized in that in the calibration of the measuring device a cylinder is used which in the circumferential direction presents at least one flat point with a predetermined extension.
    [0012]
    12. Method according to any one of claims 7 to 11, characterized in that in the calibration the measuring device is used a cylinder with sanding (88).
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    法律状态:
    2014-10-14| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-11-21| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-06-23| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-06-22| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-09-08| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 20/09/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102012018580.4A|DE102012018580B4|2012-09-20|2012-09-20|Measuring device and measuring method for in-process measurement on test specimens during a machining operation on a processing machine, in particular a grinding machine|
    DE102012018580.4|2012-09-20|
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