JP2010017846A - Apparatus for calibrating machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple apparatus that can be handled by an untrained operator. <P>SOLUTION: The calibration device (33) has a calibrator housing part (49), and the calibrator housing part (49) is equipped with: an adapter element (36) to be introduced in a tool housing part (18); a marking line (35) corresponding to a ruling line (26) on a workpiece side; and a side guiding part (38) for a base part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is an apparatus for calibrating a machine tool, particularly a portable machine tool, each machine tool having a base portion to be applied to the workpiece side and having a tool holding portion. The present invention relates to an apparatus for calibrating a machine tool, particularly a portable machine tool, provided with a non-contact operating auxiliary device for directing a scribe line defined on the side.

  Such machine tools are also known in practice in the form of saws. The machine tool is equipped with a non-contact auxiliary device that directs a saw tool formed by a saw blade to a scribe line defined on the workpiece side as a work path definition.

  This type of auxiliary device works, for example, using a laser emitter. The laser line of the laser emitter is directed to the score line. As a result, it is easy for the user to guide the machine tool along the ruled line, and in particular to cut each workpiece based on the ruled line. This is because the contact point for the tool on the workpiece cannot be easily recognized by the user. An auxiliary device that is guided by a sensor function and works in a self-supporting manner is also known.

  The premise of an advantageous operation using an auxiliary device is that the position of the auxiliary device relative to the machine tool, in particular the tool of the machine tool, is precisely oriented. This is not a matter of course in modern machine tools, especially due to the multiple functions and adjustability built into the machine tools, despite proper inspection during manufacturing. In addition, wear and damage during operation can lead to changes that can impair position accuracy and, consequently, operation results.

  Accordingly, the object of the present invention is to improve the device for calibrating a machine tool described at the beginning and to provide a device that can be handled by an amateur in a simple manner, ie as a user.

  In order to solve the above-described problems, the apparatus according to the present invention includes a calibration device having a calibrator housing portion, and the calibrator housing portion is connected to an adapter element to be introduced into the tool housing portion and a ruled line on the workpiece side. A corresponding marking line and a side guide for the base part are provided.

  Preferably, the calibrator accommodating portion is configured as a calibration plate having a side edge portion as a side guide portion.

  Preferably, the marking line is located in the longitudinal center with respect to the adapter element and the side guide.

  Preferably, the adapter element is formed in particular by a support pin formed in a step shape.

  Preferably, the marking line is located on the detection surface, the detection surface corresponds to a notched area of the base plate, and an auxiliary device with optical and / or sensor functions is directed to the base plate. .

  Preferably, the auxiliary device has a detection unit for checking the position of the ruled line and / or the recognizability of the ruled line.

  Further, in order to solve the above problems, a calibrator housing portion for an apparatus constituting a machine tool according to the present invention comprises a calibrator housing portion as a calibration plate, and a side guide portion on a lateral side in the longitudinal direction. It is provided with a marking line extending in the center in the longitudinal direction with respect to the direction guide part, and is provided with a pin-shaped adapter element arranged in the center in the longitudinal direction and projecting with respect to the calibration plate. It is characterized by that.

  Preferably, the side guide portion is formed by a longitudinal side edge portion of the calibration plate.

  Preferably, the calibrator housing is formed as an injection molded or cast product, in particular made of plastic, or as a cardboard stencil.

  Further, in order to solve the above problems, a method for calibrating a machine tool according to the present invention can apply a machine tool to a workpiece via a base portion, and has a tool accommodating portion, and a machine In a method for calibrating a machine tool that can be directed to a scribe line on the workpiece side via a general auxiliary device, the machine tool is fixedly connected to the calibrator housing part and scribed on the workpiece side. Check the position of the auxiliary device corresponding to the line with respect to the marking line provided in the calibrator housing and calibrate the machine tool when the position of the work tool is adjusted to the marking line .

  In order to solve the above problems, a detection method according to the present invention is a detection method to be used in connection with a machine tool, and a detection unit is provided for checking the position of a scribe line by a sensor function. In the detection method, the contrast gradation applied to the detection surface of the detection unit is detected as a contrast point on the line, the width of the crease line is detected through the contrast point with respect to the periphery, and the crease line Fading out the contrast points given to the outside, forming a pair of values that act as a criterion through the width of the scribe line, especially through the contrast points that are opposite to each other along the longitudinal direction in one column It is characterized by doing.

  Preferably, the center between the opposite contrast points of a pair of values serves as an application point for the machine tool work tool, in particular an application point for the machine tool work tool after calibration of the machine tool. Work as.

  Preferably, the spacing between the two contrast points of the value pair, corresponding to the width of the ruled line, forms a filter criterion for fading out the contrast points located outside the ruled line.

  Preferably, the parameter important for contrasting is adjusted to the maximum contrast of the scribe line with respect to the periphery.

  Further, in order to solve the above problems, a method of calibrating a machine tool according to the present invention can apply the machine tool to a workpiece, and the detection surface of the machine tool is detected on the surface side through a detection unit. In a method for calibrating a machine tool, inspecting and / or detecting sensory landmarks applied to the workpiece, especially for calibration on a fixed machine tool, at least on the workpiece side surface of the detection surface. It is characterized in that the mark is displayed on the display in a simulated manner.

  With the apparatus according to the present invention that has solved the above problems, the calibration apparatus is provided with a calibrator housing for the base portion of the machine tool. The workpiece is simulated by the calibration device. It is necessary to orient the auxiliary device to the crease line of the workpiece. The base part of the machine tool is fixed to the calibrator housing part, and the calibrator housing part has a marking line corresponding to the crease line on the workpiece side. The orientation to the scribe line can be easily checked, and consequently the position of the tool with respect to the scribe line and the orientation of the base part of the machine tool with respect to the upper structure of the tool can be checked.

  Thus, the calibrator receptacle is functionally and preferably forms a plate with an edge that forms a side guide for the base part, so that the calibrator receptacle is inserted into the tool receptacle. With regard to the engagement of the adapter element, there is a guaranteed connection between the calibrator housing and the machine tool based on the position and orientation that it is desired to prevent from being damaged by user error.

  Furthermore, the adapter element and the marking line are located in a notched area of the base plate to which the auxiliary device with optical and / or sensor function is directed, so that the base plate and the calibrator receptacle for the machine tool. Is given the same relationship. As a result, the calibration performed on the calibrator housing is likewise for the base plate and thus continues for the work process.

  The auxiliary device for directing the scribe line defined on the workpiece side is advantageously used in the means according to the invention for checking the position of the scribe line and for checking the recognizability of the scribe line. It has a detection unit. Advantageously, the detection unit is coupled to an actuator element that adjusts and directs the tool to the score line so that at least calibration for the tool orientation to the score line is automatically performed, if necessary. Can be activated by pressing the button on the user side, but it is not necessary to interfere with the machine on the user side.

  The implementation of the calibration of the machine tool according to the invention is not associated with an expensive device and can be achieved without access to other devices with a calibrator housing. The calibrator housing is advantageously configured as a plate with an edge boundary projecting longitudinally laterally. The marking line extends in the longitudinal center with respect to the edge boundary, and the adapter element is also arranged in the longitudinal center, in particular in a pin-like configuration. This makes it possible to manufacture the calibrator housing in one piece from an inexpensive material with a simple manufacturing method, and finally allows the construction of the calibrator housing as a cardboard stencil.

  Advantageously, the edge boundary is formed by a longitudinal side edge of the calibrator housing, thus providing the necessary rigidity and shape retention even in the case of a slight load capacity of the plate. The calibrator housing part of this configuration also forms an accessory that is particularly desired to be attached when the machine tool is sold. The accessory allows the user to perform a self-calibration and post-inspection of the product, if necessary, especially if adjustments can be made automatically.

  In the case of the configuration of the apparatus for calibrating the tool according to the present invention, the method progress at the time of calibration can be easily controlled, so that errors are almost eliminated.

  The invention further relates to a method for operating a machine tool. The machine tool is provided with a detection unit that checks the recognizability and position of the scribe line on the workpiece side using a sensor. Regarding the apparatus for performing the calibration of the above-mentioned type, when the calibration apparatus includes not only the marking line corresponding to the ruled line but also the detection pattern on the observation surface of the detection unit, particularly on the side of the calibrator housing, There is also the possibility of inspection of the detection unit, which allows practical inspection of the functions related to this during calibration.

  In the method according to the invention for operating a machine tool, on the observation plane, in particular on the detection plane, the contrast gradation given for the detection unit, in particular a jumping contrast gradation, is detected as a contrast point on the reference line. The Accordingly, the width of the ruled line can also be detected at the contrast point via the contrast gradation of the ruled line with respect to the periphery. The contrast points are separated from each other corresponding to the width of the ruled line. This means that an intermediate value between contrast points that are opposite to each other via the width of the scribe line is detected with high accuracy as an application point for the tool, and thus the calibration of the machine tool is described. As described above, the method can be used.

  In practice, it is important that, in particular, in the method according to the invention, a simplified approach is provided to fade out contrast points that are not important for the detection of crease lines. In this case, the interval between the two contrast points corresponding to the width of the ruled line is used as a filter criterion for fading out the contrast points located outside the ruled line. As a result, the surface structure is sufficiently released from the contrast gradation on the detection surface outside the ruled line detected through the detection unit. This leads to an improvement in the contrast of the ruled line with respect to the background, and it is within the framework of the present invention to adjust the parameter particularly important for contrasting to the maximum contrast of the ruled line with respect to the surroundings.

  If it is recognized within the framework of the invention that the precise scoring line essential for reliable guidance of the machine tool cannot be achieved despite optimization of parameters important for contrasting, the function is deactivated. In some cases, the semi-self-supporting work progress is interrupted, and in the unlikely event the machine tool is switched off.

  If an appropriate structure pattern is provided on the observation field of the detection unit, particularly the detection surface, on the side of the calibrator housing, the above method can be inspected within the frame of the present invention when the machine tool is calibrated. If the method is implemented appropriately, the above structural pattern is actually limited to the scribe lines, and as a result, theoretically for the work tool provided in the calibrator housing. The direction to the marking line, which is the hitting point, is performed.

  The method according to the invention in connection with the operation of machine tools, in particular sawing saws, is particularly advantageous. In the saw, in the case of a saw, in the case of a saw, the saw blade is adjusted around the central axis of the saw blade and the adjustment parameters obtained via the detection unit for the extension of the scribe line Is directed to the scoring line via post-calculation means, control means and actuating means (eg zero point adjustment with reference line), and the sawing saw is self-supporting, especially semi-self-supporting work Enable driving. In work operation, the machine tool is guided following a ruled line through a tool, and the user only needs to support the machine tool.

  It is also within the scope of the invention to simply simulate each detection pattern, i.e. each scribe line, and display it on a display, in particular using LCD technology or OLED technology. This discloses a means for displaying different shapes and geometries and for immediately recording and / or evaluating the effects of shapes and geometries on the system. In particular, for example when calibrating a saw, in particular a portable saw, this type of method discloses the possibility of fixing the saw during calibration. This is because, unlike the situation in the work process, a moving image can be displayed on the display.

1 is a schematic view of a hand-guided machine tool in the form of a saw that is in working condition with respect to a workpiece. FIG. 2 is a schematic plan view of a cut-out region of the base plate that is penetrated by the saw blade of the saw saw according to FIG. 1. FIG. 2 is a simple and schematic view of a saw saw with a saw saw base plate of a correspondingly disposed calibrator housing of a calibrator device. FIG. 2 is a plan view of a workpiece with a structured, for example, patterned surface and a scribe line extending through the surface, where the contrast transition imparted by the surface structure and scribe line is It is detected as a contrast point on the surface. In the drawing similar to FIG. 4, the contrast points not related to the progress and width of the ruled lines are faded out around the ruled lines, and only the contrast gradation of the ruled lines is detected in the background. It is clearly indicated by the contrast point written on the edge side with respect to the ruled line. It is a block diagram of the detection method which concerns on this invention. It is a block diagram of the detection method which concerns on this invention.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

  FIG. 1 clearly shows a machine tool 1 in the form of a saw saw 2. The saw saw 2 has a casing 3 and is supported via a base part 48 in the form of a base plate 4. The base plate 4 is connected to the casing 3 or the equipment and parts surrounded by the casing 3 via a swivel axis 14 extending in the direction of the longitudinal axis 12 of the saw saw 2. 2 is supported so as to be movable with respect to the workpiece 5 during work operation. The saw saw 2 has a saw blade 8 as a working tool 7.

  The working direction corresponding to the straight sawing direction is indicated by reference numeral 6. The working direction coincides with the traveling direction of the longitudinal axis 12 of the sawing saw 2, and the plane of the saw blade 8 also extends when sawing straight in the working direction.

  The saw blade 8 passes through the base plate 4 in the region of the notch 27. The notch 27 is placed in front of the working field 9 of the saw blade 8 in the working direction 6 and surrounds the detection surface 10.

  The casing 3 has a grip portion 11 in an upper region of the casing 3 on the side opposite to the base plate 4, and moves to the end wall region 13 on the front side with respect to the working direction 6. The end wall region 13 ends downward at a stepped portion 17 that forms a recess. There is a tool accommodating portion 18 in a region below the stepped portion 17. The tool housing 18 couples the saw blade 8 to a stroke rod (not shown). The saw blade 8 is driven to move in the direction of an arrow 19 through the stroke rod, and is guided to be adjustable in the direction of an arrow 21 around the rotation axis 23 of the saw blade 8.

  Furthermore, the adjusting device 20 is clearly shown in FIG. Via the adjusting device 20, the saw blade 8 can be driven so as to be capable of stroke movement in the sawing direction indicated by the arrow 24. Although not shown in FIG. 1, the adjusting device 20 includes a saw blade 8 and a stroke rod (not shown) provided on the saw blade 8 in a horizontal direction with respect to the rotation axis 23 on the upper side of the tool storage portion 18. It is supported so as to be pivotable about a pivot axis positioned in the direction.

  The casing 3 is provided with a switch assembly 15 at the grip portion 11 so as to be gripped from below. A normal switch of the machine is turned on and off via the switch assembly 15. Reference numeral 16 indicates a switching device in the side wall region of the casing 3. Different operating modes can be adjusted via the switching device. The mode of operation can be achieved in the illustrated configuration of the saw saw 2.

  Furthermore, the saw saw 2 is advantageously provided with a lighting assembly 22. The illumination assembly 22 enables illumination of the work field 9 and advantageously also enables illumination of a work area on the workpiece side located in front of the work field 9. The illumination assembly 22 is arranged at the transition of the end wall region 13 to the step 17. Advantageously, an auxiliary device 50 is also provided in this region. The auxiliary device 50 operates in a non-contact manner and serves to orient the saw saw 2 or saw blade 8 to the score line 26. In particular, the auxiliary device 50 is provided with a sensor 30 of the detection unit 28 formed by a camera. The detection unit 28 is coupled to the signal processing unit 29. The signal processing unit 29 acts on the calculation unit 31 and the control unit 32. Via the calculation unit 31 and the control unit 32 different drive devices and / or drive elements for the work tool 7 in the form of the saw blade 8, in particular a given situation detected via the detection unit 28. Take control into consideration.

  In one possible operating mode of the saw saw 2, normal operation, the saw blade 8 is directed to the longitudinal axis 12 of the saw saw 2 and is movably driven in the direction of the arrow 19. Another operation mode is swing stroke operation. In the swing stroke operation, the swing stroke motion in the direction of the arrow 24 is superimposed on the stroke driving of the saw blade 8 in the direction of the arrow 19 via the adjusting device 20. In yet another operation mode, the so-called scrolling mode (scrolling-modulus), the sawing saw 2 is moved to each of the defined work trajectories by turning the saw blade 8 about the turning axis 23 of the saw blade 8. That is, for example, the direction is directed to the ruled line 26. This can be done manually, but in particular based on the adjustment values detected by tracking the scribe line 26 via the detection unit 28 and calculated via the signal processing unit 29. . As a result, a semi-autonomous operation mode is provided. In the semi-autonomous mode of operation, the user simply supports the saw saw 2.

  FIG. 2 describes that the detection surface 10 is detected via the detection unit 28 or a sensor 30 formed as a camera of the detection unit 28. A ruled line 26 extends through the detection surface 10. For turning of the saw blade 8 about the turning axis 23, a turning area 25 corresponding to a turning angle that is particularly usable in practice is entered. The allowable angle of rotation of the saw blade 8 is at most about +/− 30 ° with respect to the longitudinal axis 12.

  If there is a deviation from the adjustment position defined by the target value, even if it is already in production, even if it is due to wear due to operation or a corresponding damage to the sawing saw due to incorrect operation of the sawing saw Inevitably with multiple adjustability at the connection between the drive-side and base plate 4 and the components of the casing-side grinding saw 2 supported via the base plate 4.

  In order to disclose a simple means of inspection and calibration, according to the present invention, a calibration device 33 with a calibrator housing 49 in the form of a calibration plate 34 is provided, as described in FIG. The base plate 4 can be arranged in a fixed position and oriented with respect to the calibration plate 34 and is particularly directed to the markings provided on the calibration plate 34, in particular to the marking lines 35. The marking line 35 coincides with the scribe line on the workpiece side in connection with practical work operation. In the case of a tool and the saw saw 2 on the ruled line, the saw blade 8 of the saw saw 2 is oriented. Corresponding to this orientation, the calibration plate 34 is provided with an adapter element 36 that is aligned and protrudes with respect to the marking line 35. The adapter element 36 is advantageously formed as a pin 37, in particular a stepped pin 37, which engages in the tool housing 18 when the base plate 4 is mounted on the calibration plate 34. This results in the positioning of the saw saw 2 with respect to the calibration plate 34 corresponding to the position of the saw blade 8 engaged with the workpiece 5 in actual operation, i.e. the adjustment if the saw saw is calibrated. The given zero position is given.

  Thus, in connection with the longitudinal guidance of the base plate 4 via the side guides 38, a shape-rigid and simple calibration device 33 is provided. The side guide part 38 is provided on the edge side of the calibration plate 34, and may be formed by an especially bent edge region or an edge region outlined in a box shape. By means of the calibration device 33, each machine tool 1, in this embodiment the saw saw 2, is supported by substantial mechanical elements of the saw saw 2, namely the base plate 4 and the base plate 4, It is possible to check whether or not the apparatus unit including the tool storage portion 18 surrounded by the casing 3 is oriented and correspondingly arranged in a correct position in an alternating manner. This can be done especially at times other than manufacturing, that is, at the customer's site.

  In the case where the machine tool 1, that is, the saw saw 2 shown in FIG. 1 in the present embodiment, includes a detection unit 28 which is schematically illustrated in FIG. 2, in particular via the sensor 30 of the machine tool 1. The position of the marking line 35 is given to the detection surface 10 when the winding saw 2 is positioned on the calibration plate 34. If the center line of the detection surface 10 covered by the longitudinal axis 12 of the saw saw 2 in FIG. 2 coincides with the marking line 35, the sensor system, in particular the camera used as sensor 30, is almost within the scope of calibration. The correct orientation is also confirmed. A corresponding adjustment device via the signal processing unit 29 from the sensor 30, ie the camera, which is taking a picture at the same time by means of suitable markings on the tool housing 18, symbolically describing the state of the tool inserted into the housing It becomes possible to check the signal chain up to. As a result, the saw saw 2 is also inspected and adjusted with respect to the orientation of the work tool 7, i.e. the saw blade 8, and can possibly be adjusted later. Basically within the scope of the present invention, the calibration is purely by the sensor, i.e. checked and implemented via software parameters, further mechanical interference is the case of the corresponding mechanical error. Only matters.

  This kind of consistent calibration is particularly important for the machine tool 1, especially for the sawing saw 2. Since it is desired to achieve accurate tracking of the scoring line 26 even under difficult working conditions and visibility conditions with the saw saw 2, the saw saw 2 works to the zero position of each defined work tool 7. Not only does it require a precise orientation of the tool 7, but it also requires tracking of the score line 26 in the center of the score line 26. In other words, it is necessary to appropriately detect the contour of the ruled line even under difficult visibility conditions. As a result, the operation to the center of the ruled line 26 thus detected is performed via the detection unit 28 in the process of signal processing. Each orientation of the tool 7 becomes possible.

  The present invention, among other things, makes it possible to detect the border on the edge of the scribing line 26, despite the way the machine tool is operated, and the scoring line 26, despite difficult visibility and contrast conditions. It also relates to the detection method. This leads to the assumption that each line center is defined by calculation, as explained on the basis of the block diagrams of FIGS. 6 and 7 clearly show the basic method procedure in the block diagram.

  4 and 5 clearly illustrate the course of the different sections of the ruled line 39 in the background 40 or 41. The background 40 in FIG. 4 corresponds to an obstructive environment having woodwork, dust, blurred outlines, etc. with respect to the ruled line 39.

  In addition, a plurality of contrast gradations are provided. The contrast gradation is indicated as a contrast point 44 in the case of the imaging technique assumed in the present embodiment along each line 43 via a line sensor, for example. The edge of the ruled line 39 relative to the background is shown as a contrast point described by reference numerals 45 and 46 if each image line 43 still has sufficient contrast.

  Accordingly, the contrast points 45 and 46 that are arranged corresponding to one image line 43 and are opposed to each other on the edge side with respect to the ruled line 29 form a value pair. 46 are positioned along the ruled line 39 with substantially the same spacing. While maintaining the progress of the ruled line 39, an intermediate interval with respect to the contrast points 44 and 45 can be defined along the ruled line 39. As a result, the image center of the ruled line 39 can also be defined. On the scoring line 39, the tool, ie the saw blade 8, can be adjusted to its zero position or to the respective required angular position.

  In order to be able to properly detect the crease line 39 without taking into account the disturbing structure of the background, it is advantageously not based on an appropriate contrast between the crease line 39 and the background, but with different irregularities. The base contrast point 44 can be faded out. This is done within the framework of the method according to the invention by using as a filter criterion the line width defined in some cases and in some cases by the value pairs—contrast points 45, 46—. Can be achieved. Therefore, the display of a large number of contrast points 44 around the ruled line 39 is omitted, resulting in a fictional background. A ruled line 39 is clearly shown against the fictional background. In addition, other parameters that influence the contrasting can be influenced, for example brightness, gain and white balance. Therefore, for example, a bright grain can be cross-fade with extremely bright brightness when white balance is detected, and as a result, it can be advantageously made invisible to the camera as the sensor 30.

  If the scribing line cannot be clearly defined in spite of the above method, i.e. the trajectory recognition is not achieved, the control function based on the trajectory recognition is advantageously stopped, e.g. for a system that operates semi-independently. In that case, the automatic machine orientation of the tool 7 along the defined but unrecognized scribing line 39 stops.

  In the scope of the calibration according to the invention, the method according to the invention can likewise be checked, in particular on the basis of at least one pattern background defined on the calibration plate 34, for example with respect to the marking line 35. Eventually, the pattern background will only allow a sufficiently clear recognition of the defined marking line 35 only if the marking line 35 has been formed on the basis of the method and thus made visible to the system. This kind of inspection can also be performed separately and, in some cases, based on different patterns that can be exchangeably arranged on the calibration plate 34.

  The block diagram of FIG. 6 clearly shows the work format of the saw saw 2 that is desired to be operated semi-self-supporting according to the present invention. In the following description, reference is made to the description of FIGS. 1 to 5, and reference numeral 50 denotes an auxiliary device having a sensor system 51 and a data processing unit 52 for detecting the state of the workpiece in the present embodiment. It is shown. As the sensor system 51, for example, the sensor 30 can be provided in the form of a camera as described with reference to FIG. 1, or a line sensor can be provided as described in FIGS. Data detected by the sensor system 51 is processed by the data processing unit 52, and is formed by the calculation unit 31 with respect to FIG. 1 and further supplied to the selection unit 53. In the selection unit 53, as long as it is advantageous or necessary, the data is checked in the response / evaluation unit 54 for the validity of the suitability of the data for each purpose.

  In the present embodiment, this is the suitability of the detection of the scribing line 39 based on the defined response criteria symbolized by the query field 55 of the query section 56 in FIG. . This kind of response criterion is particularly suitable for forming the lines on the edge of the scribing line 39, in particular the distance between the contrast points 45, 46 belonging to a value pair and / or the corresponding contrast points of different value pairs. It is the position of 45,46. In view of this query criterion and other query criteria, a selection is made in the evaluation section 57 taking into account, for example, fuzzy logic, whether all the recognized contrast points 44 are suitable for the definition of the scribe line 39. When the other contrast points 44 fade out based on the ruled lines 39 thus defined, the contrast points 45 and 46 defining the ruled lines 39 form values. These values are transmitted to the control / actuation unit 59 provided with the actuator system 60 and the operation unit 61 on the operator side via the output unit 58 specified in FIG. The saw blade 8 provided in the saw saw 2 as the work tool 7 is adjusted via the actuator system 60 according to the work direction corresponding to the ruled line 39. On the display 62 via the operation unit 61, an operation instruction analogized from the work state is displayed for the operator.

  Further, a switch assembly 63 is provided in the operation unit 61 for the user's regulation, for example, for inputting the on / off of the switch of the sawing saw 2. The signal of the switch assembly 63 does not require evaluation. The same can be detected in some cases via the sensor system 51, for example for data relating to safety aspects arising from user interference with the work field 9. In this type of case, therefore, the selection unit 53 merely forms a linkage in the signal chain. Other parts and / or equipment of the saw saw 2 via the signal chain, for example the drive motor of the saw saw 2, can respond. In this case, the response / evaluation unit 54 does not need to be passed, and can be bypassed as indicated by parentheses 64 in FIG.

  DESCRIPTION OF SYMBOLS 1 Machine tool, 2 Grinding saw, 3 Casing, 4 Base plate, 5 Workpiece, 6 Working direction, 7 Working tool, 8 Saw blade, 9 Working field, 10 Detection surface, 11 Grip part, 12 Length of grinding saw 2 Direction axis, 13 end region, 14 swivel axis, 15 switch assembly, 16 switching device, 17 steps, 18 tool storage, 19 arrow, 20 adjustment device, 21 arrow, 22 lighting device, 23 rotation axis, 24 arrow, 25 turning area, 26 crease line, 27 notch, 28 detection unit, 29 signal processing unit, 30 sensor, 31 calculation unit, 32 control unit, 33 calibration device, 34 calibration plate, 35 marking line, 36 adapter element, 37 Stepped pins 38 side guide part, 39 ruled line, 40, 41 background, 43 image line, 44, 45, 46 contrast point, 48 base part, 49 calibrator housing part, 50 auxiliary device, 51 sensor system, 52 data processing part, 53 selection unit, 54 response / evaluation section, 55 inquiry field, 56 inquiry section, 57 evaluation section, 58 output section, 59 control / actuation unit, 60 actuator system, 61 operation unit, 62 display, 63 switch assembly

Claims (15)

Device for calibrating a machine tool, in particular a portable machine tool (1), each machine tool having a base part (48) to be applied to the workpiece side and having a tool holder (18) A machine tool, in particular a portable machine tool, provided with a non-contacting auxiliary device for directing the marking line (26) defined on the workpiece side In the device
The calibration device (33) has a calibrator housing part (49). The calibrator housing part (49) includes an adapter element (36) to be introduced into the tool housing part (18) and a ruler on the workpiece side. An apparatus for calibrating a machine tool, comprising a marking line (35) corresponding to a writing line (26) and a side guide (38) for the base part.   Device according to claim 1, wherein the calibrator housing (49) is configured as a calibration plate (34) with lateral edges as side guides (38).   3. The device according to claim 1, wherein the marking line (35) is centrally located in the longitudinal direction with respect to the adapter element (36) and the side guide (38).   4. The device according to claim 1, wherein the adapter element is formed by a support pin formed in a stepped shape. 5.   The marking line (35) is located on the detection surface (10), which corresponds to the notched area of the base plate (4) and is optical and / or sensory to the base plate (4). 5. The device according to claim 1, wherein the auxiliary device (50) with function is oriented.   Device according to claim 5, wherein the auxiliary device (50) comprises a detection unit (28) for checking the position of the score line (26) and / or the recognizability of the score line (26). Especially in a calibrator housing for a device (33) for calibrating a machine tool according to any one of claims 1 to 6,
The calibrator accommodating portion (49) includes a side guide portion (38) in the longitudinal direction as a calibration plate (34), and a marking line extending in the center in the longitudinal direction with respect to the side guide portion (38). (35), comprising a pin-shaped adapter element (36) arranged in the center in the longitudinal direction and projecting with respect to the calibration plate (34), in particular configured in one piece Calibrator housing for the equipment that makes up the machine.   The calibrator housing portion according to claim 7, wherein the side guide portion (38) is formed by a longitudinal side edge of the calibration plate (34).   9. The calibrator housing part according to claim 7 or 8, wherein the calibrator housing part (49) is formed in particular as an injection-molded or cast product made of plastic or as a cardboard stencil. A method for calibrating a machine tool, in particular a portable machine tool (1), wherein the machine tool (1) can be applied to a workpiece (5) via a base part (48) and a tool receptacle 10. (18) and can be directed to a scribe line (26) on the workpiece side via a mechanical auxiliary device (50), in particular according to any one of claims 1 to 9 In a method for calibrating a machine tool as described,
The machine tool (1) is fixedly connected to the calibrator housing (49) in a fixed manner, and the marking provided on the calibrator housing (49) corresponds to the ruled line (26) on the workpiece side. Checking the position of the auxiliary device (50) relative to the line (35) and calibrating the machine tool (1) when the position of the work tool (7) is adjusted to the marking line (35), How to calibrate the machine. A detection method, in particular a detection method desired to be used in connection with a machine tool according to any one of claims 1 to 9, wherein the detection unit ( In the detection method provided with 28)
The contrast gradation provided to the detection surface (10) of the detection unit (28) is detected as a contrast point (44 to 46) on the line (43), and the width of the ruled line (39) is contrasted with respect to the periphery. A contrast point (44) detected through the points (45, 46) and applied to the outside of the ruled line (39) is faded out, and in particular through the width of the ruled line (39), one column ( 43) forming a pair of values that serve as a decision criterion via contrast points (45, 46) that are opposed to each other along the longitudinal direction.   The center between the opposite contrast points (45, 46) of a pair of values serves as the contact point for the work tool (7) of the machine tool (1), in particular after calibration of the machine tool (1). The method according to claim 11, which serves as an application point for the work tool (7) of the machine tool (1).   The distance between the two contrast points (45, 46), which is a pair of values, corresponding to the width of the ruled line (39) is a fade-out of the contrast point (44) located outside the ruled line (39). 13. A method according to claim 11 or 12, forming a filter criterion for.   14. Method according to claim 11 or 13, wherein the parameter important for contrasting is adjusted to the maximum contrast of the crease line (39) with respect to the periphery. A method for calibrating a machine tool, in particular a portable machine tool according to claim 1, wherein the machine tool can be applied to a workpiece, in which a detection unit ( In a method for calibrating a machine tool, inspecting and / or detecting sensory landmarks applied to the workpiece (5) on the surface side at the detection surface (10) via 28)
Calibrating a machine tool, characterized in that, for calibration in a fixed machine tool (1), at least a mark on the workpiece side of the detection surface (10) is simulated and displayed on a display. Method.

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