JP2019141941A - Cutting working device and cutting working method - Google Patents

Abstract

To perform cutting work on a surface with a high degree of accuracy even if using a long cutting tool.SOLUTION: A cutting device 100 cutting a surface to be cut of an object 10 to be cut, into a predetermined shape and dimension comprises: an input part 160; a cutting part 110 having a rod and a cutting tool; a driving part 120 moving and driving the cutting part 110; a measuring part 130 having a gap detector and a gap detector-signal transmitting part; a control calculating part 140 receiving information relating to cutting received by the input part 160 and a signal from the measuring part 130 and emits a driving command signal to the driving part 120; and a progress control part 190. The control calculating part 140 has: a cutting target value setting part 142 that sets a target cutting thickness required for the surface to reach the predetermined shape and dimension; a characteristics function part 143 that protrudes from the driving part 120 of the rod and calculates displacement of the driving part 120 on the basis of an effective length to the cutting tool and the target cutting thickness; and a characteristics function correcting part 144 that corrects the characteristics function part 143 on the basis of a signal from the measuring part 130.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a cutting apparatus and a cutting method.

  In the rotor shaft of a rotating electrical machine, for example, for the passage of conductors connecting between elements in an excitation device in a brushless synchronous rotating electrical machine, or for the passage of lead wires of a rotor winding in a winding type induction motor, A central hole extending in the axial direction may be formed in the rotor shaft. Alternatively, in the gas turbine, a central hole may be formed as a flow path for allowing the cooling gas to pass through the rotor shaft.

  Furthermore, for example, a case may be considered in which a structure extending further in the axial direction is inserted into the hole, and the clearance between the outer surface of the structure and the inner surface of the hole is within a predetermined range. It is done.

  As in the above examples, it is often necessary to perform deep hole cutting (BTA: Boring & Treppanning Association) inside the shaft.

Japanese Patent No. 5305022 JP 2009-148853 A

  When forming a hole extending in the axial direction with a long drill, it is important to form the hole linearly along the axis without bending. For example, there are technologies to prevent the long drill from steadying, such as a technology that provides a sleeve member through which a long drill can be inserted in front of the workpiece, and a technology that enables an intermediate bush to move back and forth between the workpiece. (Patent Documents 1 and 2).

  On the other hand, when forming a hole extending in the axial direction inside an elongated member extending in the axial direction such as a rotor shaft, for example, when the diameter of the hole changes in the axial direction, In some cases, it may be necessary to use a cutting tool such as a long tool. Thus, high dimensional accuracy is required particularly when the hole diameter changes.

  In deep hole cutting, for example, when a roundness of about 1 mm is required for a hole length of 1 m, it is difficult to perform reference scoring and positioning with the normal processing method, and when the inner diameter is expanded. However, there is a problem that it is difficult to set the origin position at the time of reworking.

  In this way, when cutting a workpiece with a cutting tool instead of a drill for drilling, naturally, a load in a direction perpendicular to the longitudinal direction is applied to the workpiece from the side of the cutting tool. The That is, a load in the bending direction is applied to the object to be processed.

  As a result, a reaction force from the machining target is also applied to the cutting tool side. For this reason, the long cutting tool is bent according to its bending rigidity. In particular, in a long cutting tool, the displacement due to bending may not be negligible with respect to machining accuracy, but even in such a case, machining with high accuracy is required.

  Further, for example, when it is necessary to use a long cutting tool such as formation of a surface such as a flat surface or a curved surface facing a narrow gap, there is a similar problem.

  Then, even if it is a case where a long cutting tool is used, this invention aims at performing the surface cutting process accurately.

  In order to achieve the above-described object, the present invention is a cutting device that cuts a cutting target surface into a predetermined shape size, an input unit that receives information related to cutting from the outside, a rod, and an attachment to the rod A cutting unit having a cutting tool, a driving unit that moves and drives the cutting unit, a gap detector that is attached to the rod and measures a distance from the cutting target surface, and transmits a signal from the gap detector A measurement unit having a gap detector signal transmission unit, information on the cutting received by the input unit, and a control calculation unit that receives a signal from the measurement unit and issues a drive command signal to the drive unit; Based on the state of the input unit, the cutting unit, the drive unit, the measurement unit and the control calculation unit, and a progress control unit that outputs a progress instruction to these, The control calculation unit includes a cutting target value setting unit for setting a target cutting thickness for reaching the predetermined shape dimension, an effective length protruding from the driving unit of the rod to the bite, and the target cutting thickness. And a characteristic function unit that calculates a displacement of the driving unit of the driving unit, and a characteristic function correction unit that corrects the characteristic function unit based on a signal from the measurement unit. .

  Further, the present invention is a cutting method for cutting a cutting target surface of a cutting target into a predetermined shape dimension, wherein the control calculation unit calculates a target cutting thickness of the cutting target surface, A driving unit displacement calculating step in which the control calculation unit calculates a driving unit displacement of the driving unit using a characteristic function; and the driving unit moves the driving unit displacement from a contact start position, The cutting step that returns after cutting, the distance measuring step in which the measuring unit measures the distance from the cutting target surface after the cutting step, and the progress control unit finishes cutting the cutting target surface A cutting end determination step for determining whether or not the progress control unit determines that the cutting has not ended in the cutting end determination step, the characteristic function correction unit is configured to perform the characteristic based on the measurement result of the measurement unit. Seki It characterized by having a a characteristic function modifying step of modifying.

  According to the present invention, even when a long cutting tool is used, surface cutting can be performed with high accuracy.

It is a longitudinal section showing the composition of the cutting device concerning the embodiment of the present invention. It is a block diagram mainly showing the composition of the operation panel of the cutting device concerning the embodiment of the present invention. It is a graph explaining the characteristic function part of the calculating part of the cutting device which concerns on embodiment of this invention. It is a longitudinal section showing the 1st operation state of the cutting device concerning the embodiment of the present invention. It is a longitudinal section showing the 2nd operation state of the cutting device concerning the embodiment of the present invention. It is a graph explaining the modification of the characteristic function part of the calculating part of the cutting device which concerns on embodiment of this invention. It is a graph explaining the characteristic function correction | amendment part of the calculating part of the cutting device which concerns on embodiment of this invention. It is a flowchart which shows the procedure of the cutting method which concerns on embodiment of this invention.

  Hereinafter, a cutting apparatus and a cutting method according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a configuration of a cutting apparatus according to an embodiment of the present invention. The cutting apparatus 100 according to the present embodiment is an apparatus that cuts a cutting target surface 11 of a cutting target 10 into a predetermined shape.

  FIG. 1 shows an example in which the cutting target 10 is cylindrical. The object 10 to be cut is gripped by the object gripping portion 12, for example, in the vicinity of the end surface on the side opposite to the side accessed by the cutting apparatus 100. The object gripping part 12 is supported stationary. In FIG. 1, for convenience, the case where the cutting target 10 is arranged so as to extend in the vertical direction is displayed, but the direction is not limited, and for example, the case where the cutting target 10 extends in the horizontal direction. May be. Here, the axial direction of the cylinder is called the z direction, the radial direction from the axial center of the cylinder is called the r direction, and the circumferential direction of the cylinder is called the θ direction.

  The cutting apparatus 100 includes a cutting unit 110, a driving unit 120, a measuring unit 130, and an operation panel 200.

  The cutting unit 110 includes a cutting tool 111 and a rod 115. The cutting tool 111 is attached in the vicinity of the end of the rod 115, is set at a location facing the cutting target surface 11, and cuts the cutting target surface 11. The rod 115 is restrained by the drive unit 120 and is driven to move according to the operation of the drive unit 120.

  The measurement unit 130 includes a gap detector 131, a gap detector signal transmission unit 132, a plurality of proximity sensors 135, and a proximity sensor signal transmission unit 136.

  The gap detector 131 is attached in the vicinity where the cutting tool 111 on the rod 115 is attached. The gap detector 131 measures the gap between the cutting target surface 11, that is, the distance between the gap detector 131 and the cutting target surface 11. The output of the gap detector 131 is transmitted to the operation panel 200 by the gap detector signal transmission unit 132.

  The plurality of proximity sensors 135 are provided around the rod 115, specifically, outside the cutting target 10 in the axial direction and close to a portion between the cutting target 10 and the drive unit 120. The plurality of proximity sensors 135 are, for example, three, and are arranged around the rod 115 at intervals in the circumferential direction.

  The proximity sensor 135 is, for example, a capacitance type, and can measure displacement in a direction (radial direction) perpendicular to the longitudinal direction of the rod 115. By disposing the plurality of proximity sensors 135 at intervals in the circumferential direction, the radial displacement of the rod 115 can be detected regardless of the radial displacement in any circumferential region. . Even if the number of proximity sensors 135 is one, the number of proximity sensors 135 may be one as long as minute vibration of the rod 115 can be reliably detected. The output of the proximity sensor 135 is transmitted to the operation panel 200 by the proximity sensor signal transmission unit 136.

  The gap detector signal transmission unit 132 and the proximity sensor signal transmission unit 136 are signal cables, for example, and may be signal transmission means using a laser in addition to an electrical signal, for example.

  The drive unit 120 includes a z-direction drive unit 121, an r-direction drive unit 122, and a θ-direction drive unit 123. The z-direction drive unit 121 translates the cutting unit 110 in the z direction. The r-direction drive unit 122 translates the cutting unit in the r direction. The θ-direction drive unit 123 moves the circumferential position of the cutting unit 110 around the axis center of the cutting target 10. A drive command transmission unit 145 is provided between the drive unit 120 and the operation panel 200, and the drive unit 120 moves and drives the cutting unit 110 based on a drive command signal from the operation panel 200.

  1 shows a case where the cutting object 10 is gripped by the object gripping part 12, but the object gripping part 12 is fixed to, for example, a rotating part of a lathe (not shown) or the object The gripping portion 12 may be a part of a lathe such as a chuck, and the cutting target 10 may be cut while rotating around its central axis 15. In that case, the θ-direction drive unit 123 may not be provided.

  The operation panel 200 includes a control calculation unit 140, a storage unit 150, an input unit 160, an output unit 170, an interface 180, and a progress control unit 190. As the operation panel 200, for example, a computer system can be used.

  FIG. 2 is a block diagram mainly showing the configuration of the operation panel of the cutting apparatus according to the embodiment of the present invention.

  The input unit 160 receives an external input from an operator or the like and outputs the input to the control calculation unit 140 and the storage unit 150. The input from the outside is information related to cutting, for example, information related to the cutting object 10, that is, the shape, dimensions, material, etc. of the cutting object 10, the current shape dimensions, and the final shape dimensions after the target cutting. is there.

  The output unit 170 displays the cutting status of the cutting target 10, abnormalities in the cutting status, and the like. Further, a signal from the proximity sensor signal transmission unit 136 notifies the operator that the cutting tool 111 has contacted the cutting target surface 11 by a display or an alarm.

  The interface 180 exchanges signals between the operation panel 200 and the outside, such as receiving signals from the measurement unit 130 or outputting signals to the driving unit 120.

  The progress control unit 190 determines whether or not the control step can proceed, confirms the status of each element in the operation panel 200, and outputs a progress command to each element in the operation panel 200.

  The control calculation unit 140 includes a final shape dimension setting unit 141, a cutting target value setting unit 142, a characteristic function unit 143, and a characteristic function correcting unit 144.

  The final shape / dimension setting unit 141 is based on the information regarding the cutting target 10 that is an external input received by the input unit 160, and each part necessary for realizing the final dimensional shape and the final dimensional shape of the cutting target 10. The cutting thickness Dt is set. The cutting thickness Dt may be input from the outside, but may be calculated by the final shape / dimension setting unit 141. Information such as the set final dimension and shape, the cutting thickness Dt of each part, and the like is stored in the storage unit 150.

  The cutting target value setting unit 142 sets the target cutting thickness Dc and the number of times of cutting N to be cut in one cutting operation with respect to the cutting thickness Dt that is the difference between the initial dimension and the final dimension at a predetermined position. Set. Therefore, in calculation, the number of times of cutting N is (INT (Dt / Dc) +1) when the target cutting thickness Dc is a constant value. Here, INT (x) is an integer value obtained by discarding the decimal point of the value of x.

  Note that the target cutting thickness Dc may be input as an empirical value by an external input. Alternatively, it may be calculated or designated by external input according to the position in the axial direction.

  The storage unit 150 receives and stores the external input received by the input unit 160 and the calculation result of the control calculation unit 140.

  FIG. 3 is a graph for explaining the characteristic function part of the calculation part of the cutting apparatus according to the embodiment of the present invention. In the graph showing the contents of the characteristic function unit 143, the horizontal axis represents the target cutting thickness Dc, and the vertical axis represents the drive unit displacement Dd.

  For example, the characteristic function unit 143 has a value of the drive unit displacement Dd with respect to a discrete value of the target cutting thickness Dc, and when the target cutting thickness Dc is in the middle of the discrete value, By the insertion, the value of the drive unit displacement Dd is output. Further, when the effective length Ls described later is used as a parameter, for each combination of discrete values of the target cutting thickness Dc and the effective length Ls, the drive portion displacement Dd has a value, and the target When the cutting thickness Dc or the effective length Ls is in the middle of a discrete value, the value of the drive unit displacement Dd is output by interpolation. As long as the characteristic function unit 143 has such a function, the value of the drive unit displacement Dd may be calculated and output by mathematical calculation of a function using the target cutting thickness Dc and the effective length Ls as variables. .

  The target cutting thickness Dc is a target value of the cutting thickness. Here, the cutting thickness is a change in the thickness of the cutting target surface 11 cut by one cutting operation as described above. That is, the amount perpendicular to the cutting target surface 11 is the amount of change in the position of the cutting target surface 11 in the direction.

  Here, the position of the drive unit 120 where the cutting tool 111 starts to contact the cutting target surface 11 is referred to as a contact start position. The contact start position is detected by superimposing a minute vibration component of the cutting unit 110 generated when the cutting tool 111 contacts the cutting target surface 11 on a signal from the proximity sensor 135 sent via the proximity sensor signal transmission unit 136. By doing so, it can be grasped. Note that the interface 180 has a detection function portion for superimposing minute vibration components.

  The drive unit displacement Dd is a displacement from the contact start position that the drive unit 120 should move to press the cutting tool 111 to cut the target cutting thickness Dc. Here, the drive unit 120 is the r-direction drive unit 122 in the case illustrated in FIG. 1. That is, it can be said that the drive unit displacement Dd is a width that further moves further from the contact start position in the direction in which the r-direction drive unit 122 moves to bring the cutting tool 111 closer to the cutting target surface 11.

  In the graph shown in FIG. 3, after the cutting tool 111 comes into contact with the surface of the cutting target 10, the r-direction driving unit 122 is moved in the thickness direction of the cutting target 10 by the driving unit displacement Dd. When pressed against the surface, the surface of the cutting object 10 is created so that the target cutting thickness Dc can be cut.

  FIG. 3 shows a straight line F indicated by a broken line, a characteristic curve A indicated by a solid line, and a characteristic curve B indicated by a two-dot chain line. A straight line F indicates a case where Dd = Dc, that is, a case where the bending rigidity G of the cutting portion 110 is substantially infinite. On the other hand, in the characteristic curve A and the characteristic curve B, the value of the drive part displacement Dd is large with respect to the same target cutting thickness Dc. This point will be described below with reference to FIGS.

  FIG. 4 is a longitudinal sectional view showing a first operation state of the cutting apparatus according to the embodiment of the present invention. FIG. 4 shows a case corresponding to the characteristic curve A shown in FIG.

  Here, when the length of the rod 115 protruding from the z-direction drive unit 121 to the position of the cutting tool 111 is referred to as an effective length Ls of the rod 115, FIG. 4 shows a case where the effective length is Ls1. In this case, the drive unit displacement Dd of the r-direction drive unit 122 is Dd1. Hereinafter, the amount of movement of the r-direction drive unit 122 after the cutting tool 111 is pressed against the surface of the cutting object 10 is represented as a drive unit displacement Dd.

  FIG. 5 is a longitudinal sectional view showing a second operation state of the cutting apparatus according to the embodiment of the present invention. FIG. 5 shows a case corresponding to the characteristic curve B shown in FIG. FIG. 5 shows a case where the effective length is Ls2. In this case, the value of the drive unit displacement Dd is Dd2.

  Now, when the force which presses the cutting tool 111 against the surface of the cutting object 10 is equal, it is considered that the thickness actually cut is equal. In the case shown in FIG. 4 and the case shown in FIG.

  In this case, the effective length Ls is Ls2> Ls1, and the drive unit displacement Dd is Dd2> Dd1. This is because the bending rigidity G of the cutting part 110 including the rod 115 is lower when the effective length Ls is longer. For this reason, the characteristic curve A corresponding to the state shown in FIG. 4 is the same target cutting thickness as the characteristic curve B corresponding to the state shown in FIG. For the length Dc, the value of the drive unit displacement Dd increases. In addition, since the straight line F is a case where the bending rigidity G of the cutting part 110 is infinite, the characteristic curve A and the characteristic curve B have the drive part displacement Dd larger than the straight line F.

  In FIG. 3, characteristic curves A and B corresponding to two cases with different bending stiffness G of the cutting part 110 are shown, but more characteristics with the bending rigidity G of the cutting part 110 as a parameter are shown. A curve may be shown. Further, the effective length Ls may be used as a parameter instead of the bending rigidity G of the cutting part 110. In reality, it is considered easier to use the effective length Ls.

  FIG. 6 is a graph illustrating a characteristic function 143a that is a modification of the characteristic function unit 143a. The horizontal axis represents the effective length Ls of the rod 115, and the vertical axis represents the drive unit displacement Dd of the drive unit 120.

  Since the target cutting thickness Dc has a relatively small range, the relational data of the drive unit displacement Dd with respect to the effective length Ls of the rod 115 may be effective. In this case, a plurality of characteristic curves for each target cutting thickness Dc are displayed using the target cutting thickness Dc as a parameter.

  The characteristic function correcting unit 144 corrects the characteristic function unit 143 as necessary based on the result of the measurement unit 130 measuring the cut object 10 after cutting.

  FIG. 7 is a graph illustrating the characteristic function correction unit. According to the initial characteristic curve A, in order to secure the cutting thickness Dc0, the drive unit displacement Dd should be Dd1. The cutting tool 111 is separated from the cutting target surface 11 of the cutting object 10 and measured by the measuring unit 130 after cutting by applying the cutting tool 111 with the driving part displacement Dd as Dd1. From this result, it is assumed that the result of measuring the actual cutting width is Dc1.

  That is, it is assumed that the point P0 on the characteristic curve A is initially assumed on the characteristic, but the point P1 is not actually on the characteristic curve A. In this case, the characteristic function correcting unit 144 corrects the characteristic curve from the characteristic curve A to the characteristic curve Ac passing through the point P1. The correction method may be to enlarge the curve A to the horizontal axis side at a ratio of (Dc1 / Dc0), similar to the original curve A.

  FIG. 8 is a flowchart showing the procedure of the cutting method according to the embodiment of the present invention.

  The cutting apparatus 100 and the cutting object 10 are set, and the input unit 160 receives external input such as the final shape dimension of the cutting object 10 (step S01).

  First, the cutting unit 110 is set so that the central axis of the rod 115 coincides with the central axis 15 of the cutting target 10 by the operation of the r-direction driving unit 122 when the cutting unit 110 is outside the cutting target 10. The In this state, when the cutting tool 111 interferes with the cutting target 10 when inserted into the cutting target 10, the cutting unit 110 may be aligned with the central axis 15 of the cutting target 10 as a whole. .

  After setting in this way, the cutting unit 110 is moved by the z-direction drive unit 121 so that the cutting tool 111 faces the cutting target surface 11. The state set in this way is the state shown in FIG.

  Next, the drive unit 120 moves and drives the cutting unit 110 so as to move the cutting tool 111 to a position facing the cutting target surface 11 (step S02).

  As a result of step S02, the measuring unit 130 measures the distance from the cutting target surface 11 in a state where the cutting tool 111 faces the cutting target surface 11 (step S03).

  Next, the cutting target value setting unit 142 determines the number of times of cutting and the target cutting thickness Dc per time for the cutting target surface 11 facing the cutting tool 111 (step S04).

  Next, the characteristic function unit 143 determines a drive unit displacement Dd for realizing the target cutting thickness Dc (step S05).

  The drive unit 120 drives the cutting unit 110 to move. The storage unit 150 stores the position of the drive unit 120 at the time when the contact start is confirmed by a signal from the proximity sensor 135. From that position, the drive unit 120 drives the cutting unit 110 to move in the same direction by the drive unit displacement Dd obtained in step S05, and cuts the cutting target surface 11 (step S06).

  After the cutting, the drive unit 120 moves and drives the cutting unit 110 to return to the original position (step S07).

  Next, the measuring unit 130 measures the distance from the cutting target surface 11 (step S08). The measurement values obtained in step S03 and step S08 are stored in the storage unit 150. Further, the characteristic function correcting unit 144 calculates the actual cutting thickness Dc.

  Next, the progress control unit 190 determines whether or not the cutting on the cutting target surface 11 has finished a predetermined number of times (N times) (step S09). If it is determined that the cutting of the cutting target surface 11 has been completed (YES in step S09), the progress control unit 190 determines whether the entire cutting target 10 has been completed (step S11).

  When the progress control unit 190 determines that the cutting of the cutting target surface 11 has not been completed (NO in step S09), the characteristic function correcting unit 144 corrects the characteristic function unit 143 (step S10). . After the characteristic function correcting unit 144 corrects the characteristic function unit 143, Steps S04 to S09 are repeated.

  If the progress control unit 190 does not determine in step S11 that the entire cutting object 10 has been completed (NO in step S11), step S02 to step S11 are repeated. In addition, when the progress control unit 190 determines in step S11 that the entire cutting target 10 has been completed (YES in step S11), the cutting process on the cutting target 10 is ended.

  As described above, according to this embodiment, even when a long cutting tool is used, surface cutting can be performed with high accuracy.

[Other Embodiments]
As mentioned above, although embodiment of this invention was described, embodiment is shown as an example and is not intending limiting the range of invention.

  For example, in the embodiment, the case where the object to be cut is cylindrical and a long cutting tool is used for drilling the hole is shown as an example, but the present invention is not limited to this. For example, when a long cutting tool needs to be used even when the object to be cut is not cylindrical, such as the formation of a surface such as a flat surface or curved surface facing a narrow gap, Applicable.

  Furthermore, these embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... Object to be cut, 11 ... Surface to be cut, 12 ... Object gripping part, 15 ... Center axis, 50 ... Object holding part, 100 ... Cutting device, 110 ... Cutting part, 111 ... Bite, 115 ... Rod, 115a ... Rod shaft, 120... Drive unit, 121... Z direction drive unit, 122... R direction drive unit, 123... Θ direction drive unit, 130. ... proximity sensor, 136 ... proximity sensor signal transmission unit, 140 ... control calculation unit, 141 ... final shape dimension setting unit, 142 ... cutting target value setting unit, 143, 143a ... characteristic function unit, 144 ... characteristic function correction unit, 145 ... Drive command transmission unit, 150 ... Storage unit, 160 ... Input unit, 170 ... Output unit, 180 ... Interface, 190 ... Progress control unit, 200 ... Operation panel

The drive unit 120 includes a z-direction drive unit 121, an r-direction drive unit 122, and a θ-direction drive unit 123. z-direction drive unit 121, thereby moving the cutting unit 110 in the z-direction. r-direction driving section 122, thereby moving the cutting unit 110 in the r direction. The θ-direction drive unit 123 moves the circumferential position of the cutting unit 110 around the axis center of the cutting target 10. A drive command transmission unit 145 is provided between the drive unit 120 and the operation panel 200, and the drive unit 120 moves and drives the cutting unit 110 based on a drive command signal from the operation panel 200.

The final geometry setting unit 141, based on information relating to the cutting object 10 is an external input to the input unit 160 accepts, cutting the thickness of each portion required to achieve a final dimension shape of the cutting target 10 Dt is set. The cutting thickness Dt may be input from the outside, but may be calculated by the final shape / dimension setting unit 141. Information such as the set final dimension and shape, the cutting thickness Dt of each part, and the like is stored in the storage unit 150.

The target cutting thickness Dc is a target value of the cutting thickness. Here, the cutting thickness is a change in the thickness of the cutting target surface 11 cut by one cutting operation as described above. That is, in the direction perpendicular to the cutting object surface 11, the amount of change in the position of the cutting object surface 11.

FIG. 6 is a graph illustrating a characteristic function 143a which is a modification of the characteristic function unit 143. The horizontal axis represents the effective length Ls of the rod 115, and the vertical axis represents the drive unit displacement Dd of the drive unit 120.

DESCRIPTION OF SYMBOLS 10 ... Object to be cut, 11 ... Surface to be cut, 12 ... Object gripping part, 15 ... Center axis , 100 ... Cutting device, 110 ... Cutting part, 111 ... Bite, 115 ... Rod , 120 ... Drive part, 121 ... z direction drive unit, 122 ... r direction drive unit, 123 ... θ direction drive unit, 130 ... measuring unit, 131 ... gap detector, 132 ... gap detector signal transmission unit, 135 ... proximity sensor, 136 ... proximity sensor signal Transmission unit 140... Control operation unit 141 141 Final shape dimension setting unit 142 Cutting target value setting unit 143 143a Characteristic function unit 144 Characteristic function correction unit 145 Drive command transmission unit 150 Storage , 160 ... input unit, 170 ... output unit, 180 ... interface, 190 ... progress control unit, 200 ... operation panel

Claims (8)

A cutting device for cutting a cutting target surface into a predetermined shape dimension,
An input unit for receiving information on cutting from the outside,
A cutting part having a rod and a cutting tool attached to the rod;
A drive unit for moving and driving the cutting unit;
A measurement unit having a gap detector that is attached to the rod and measures a distance from the cutting target surface, and a gap detector signal transmission unit that transmits a signal from the gap detector;
A control operation unit that receives information on the cutting received by the input unit and a signal from the measurement unit and issues a drive command signal to the drive unit;
Based on the state of the input unit, the cutting unit, the drive unit, the measurement unit and the control calculation unit, a progress control unit that outputs a progress instruction to these, and
With
The control calculation unit is
A cutting target value setting unit for setting a target cutting thickness for reaching the predetermined shape dimension;
A characteristic function part for calculating the displacement of the drive part of the drive part based on the effective length from the drive part of the rod to the bite and the target cutting thickness;
A characteristic function correcting unit for correcting the characteristic function unit based on a signal from the measuring unit;
A cutting apparatus characterized by comprising:   The cutting device according to claim 1, wherein the drive unit changes an effective length of the rod between the drive unit and the cutting tool according to a position of the cutting target surface.   The cutting apparatus according to claim 2, wherein the characteristic function of the characteristic function unit has the target cutting thickness as an input and the effective length of the rod as a parameter.   The cutting apparatus according to claim 2, wherein the characteristic function of the characteristic function unit has the effective length of the rod as an input and the target cutting thickness as a parameter. The measurement unit further includes a proximity sensor arranged in the vicinity of the cutting unit, and a proximity sensor signal transmission unit that transmits a signal of the proximity sensor,
The control calculation unit determines that the position of the cutting unit at which the signal of the proximity sensor starts to include a signal due to minute vibrations of the cutting unit is a position at which the cutting unit starts to contact the surface to be cut. To
The cutting apparatus according to any one of claims 1 to 4, wherein: The cutting object has the cutting object surface that extends along the central axis and is rotationally symmetric about the central axis;
The cutting object and the cutting part rotate relative to each other around the central axis.
The cutting apparatus according to any one of claims 1 to 5, wherein:   The cutting device according to claim 6, wherein the drive unit moves and drives the cutting unit in a direction perpendicular to the central axis. A cutting method for cutting a surface to be cut into a predetermined shape dimension,
A control value calculating step for calculating a target cutting thickness of the cutting target surface;
A drive unit displacement calculating step in which the control calculation unit calculates a drive unit displacement of the drive unit using a characteristic function;
A cutting step in which the drive unit moves after moving the drive unit displacement from a contact start position, cuts the cutting target surface, and returns.
After the cutting step, a measuring unit measures a distance from the cutting target surface, and a distance measuring step;
A cutting end determination step for determining whether or not the progress control unit has finished cutting on the cutting target surface;
When the progress control unit determines that the cutting has not ended in the cutting end determination step, a characteristic function correction step in which the characteristic function correction unit corrects the characteristic function based on the measurement result of the measurement unit;
A cutting method characterized by comprising:

Images