JP7240831B2 - AUTOMATIC PART PROGRAM GENERATION DEVICE FOR ROUNDITY MEASURING MACHINE, ROUNDITY MEASURING DEVICE, AND METHOD OF AUTOMATIC PART PROGRAM GENERATION FOR ROUNDITY MEASURING MACHINE - Google Patents

Description

The present invention relates to an automatic part program generation device for a roundness measuring machine, a roundness measuring device, and a method for automatically generating a part program for a roundness measuring machine.

The roundness measuring device is configured by connecting a measurement control device using a computer system to the roundness measuring machine. The measurement control device causes the roundness measuring machine to perform a measurement operation by executing a designated measurement program.
The measurement program describes what kind of measurement operation is to be performed on the workpiece to be measured. When creating a measurement program, basic measurement operations are prepared in advance as a part program and incorporated into the measurement program as needed (see Patent Document 1).
For creating a part program, there has been proposed an automatic part program generation technology based on off-line teaching in which CAD data of a workpiece is displayed on a screen and an operator designates a measurement point (see Patent Document 2).
Patent Documents 1 and 2 are techniques related to a three-dimensional measuring machine, but they can also be applied to a measurement program for a roundness measuring machine.

JP-A-10-260033 JP-A-2001-319219

The technology for automatically generating a part program described in Patent Document 2 mentioned above is used for a measurement program such as a three-dimensional measuring machine with a large degree of freedom. In addition, the CAD data of the workpiece is required, and there is a problem that it cannot be performed without the CAD data.
The present invention provides a part program automatic generation device for a roundness measuring machine, a roundness measuring device, and a part of a roundness measuring machine that can automatically generate a part program in a simple procedure at low cost without CAD data of a workpiece. It is to provide a program automatic generation method.

A part program automatic generation device for a roundness measuring machine according to the present invention causes a roundness measuring machine having a rotary table on which a work is placed and a probe capable of measuring an arbitrary surface position of the work to perform a predetermined measurement operation. A part program automatic generation device for automatically generating a part program to be executed, comprising: an edge detection unit for detecting edges of the work; and a cross-sectional shape generation unit for generating a cross-sectional shape of the work from the positions of the detected edges. , a measurement position designation unit that designates a measurement position for the generated cross-sectional shape, and a part program generation unit that generates the part program from the generated cross-sectional shape and the designated measurement position. and

In the present invention, the workpiece to be measured by the roundness measuring machine is a rotating body, and its cross-sectional shape is symmetrical with respect to the axis of rotation. Therefore, if the contour shape of one side of the rotation center axis of the work can be generated, the overall cross-sectional shape can be grasped. The one-side contour shape of the work can be determined from the position of the detected edge and the direction of the edge (upward or downward) by specifying the edge part of the work and performing edge detection along the center axis of rotation at that part. can be estimated.
Therefore, according to the present invention, it is possible to generate the cross-sectional shape of the work by a simple procedure without CAD data of the work. By designating the measurement position on the obtained cross-sectional shape, it is possible to automatically generate a part program that designates the measurement operation of the roundness measuring machine.
Thus, in the present invention, by limiting the target of the automatically generated part program to the roundness measuring machine whose work is a rotating body, the cross-sectional shape of the work can be easily generated. The cross-sectional shape can be generated by existing processes such as edge detection and graphic allocation, and these processes can also be executed by a general personal computer system.
Therefore, according to the present invention, a part program can be automatically generated by a simple procedure at low cost without CAD data of a workpiece.

In the automatic part program generation device for a roundness measuring machine of the present invention, the cross-sectional shape generation unit generates a one-sided contour shape of the workpiece from the position of the edge detected by the edge detection unit. Preferably, the cross-sectional shape is generated from the half-sided profile.

According to the present invention, it is only necessary to generate a contour shape on only one side of the axis of rotation, and processing such as allocation of a figure, which will be described later, can be performed on only one side. efficient processing can be performed.

In the automatic part program generation device for a roundness measuring machine of the present invention, the edge detection unit records the Z-axis position of the edge along the rotation center axis of the workpiece and the X-axis position intersecting the rotation center axis. Then, the orientation of the edge with respect to the center axis of rotation is recorded, and the cross-sectional shape generation unit detects the Z-axis position, the X-axis position, and the orientation of the edge detected by the edge detection unit. It is preferable that the cross-sectional shape is generated by assigning a figure to the cross-sectional shape.

In this aspect of the invention, by referring to the direction of the edge, it is possible to determine the existence area of the cross-sectional shape with respect to the position of the edge, and to efficiently generate the cross-sectional shape.
In assigning figures, a method using rectangles as figures, which will be described later, can be used. Alternatively, it is possible to use a method of allocating a figure in which each edge is sequentially connected by a plurality of line segments (line segments parallel to and perpendicular to the axis of rotation).

In the automatic part program generation device for a roundness measuring machine of the present invention, the cross-sectional shape generation unit allocates a rectangle (including a square) having the rotation center axis as one side and the edge position as the vertex. Preferably, a cross-sectional shape is generated.

According to the present invention, a cross-sectional shape can be generated efficiently by using a rectangle whose side is the axis of rotation and whose vertex is the position of the edge. For example, when a plurality of edges are detected, it is possible to allocate a plurality of rectangles with each vertex to each edge, and combine them to generate the outermost contour shape (one-sided contour shape). . Furthermore, by transferring the obtained one-sided contour shape to the opposite side with respect to the rotation center axis, it is possible to generate a line-symmetrical cross-sectional shape with respect to the rotation center axis.

The roundness measuring apparatus of the present invention comprises a roundness measuring machine having a rotary table on which a workpiece is placed and a probe capable of measuring an arbitrary surface position of the workpiece; a measurement control device to be executed by the circularity measuring machine, the measurement control device having an automatic part program generation unit for automatically generating a part program that can be used for the measurement program, and the automatic part program generation unit an edge detection unit for detecting an edge of the work; a cross-sectional shape generation unit for generating a cross-sectional shape of the work from the position of the detected edge; and a part program generator that generates the part program from the generated cross-sectional shape and the designated measurement position.

According to the present invention, a part program can be automatically generated in a simple procedure at a low cost even without CAD data of a workpiece, by virtue of the functions and effects as described with respect to the automatic part program generation device for a roundness measuring machine. can be done.

In the method for automatically generating a part program for a roundness measuring machine according to the present invention, a roundness measuring machine having a rotary table on which a workpiece is placed and a probe capable of measuring an arbitrary surface position of the workpiece performs a predetermined measurement operation. A part program automatic generation method for automatically generating a part program to be executed, comprising: an edge detection step of detecting an edge of the work; and a cross-sectional shape generation step of generating a cross-sectional shape of the work from the position of the detected edge. , a measurement position designation step of designating a measurement position in the generated cross-sectional shape, and a part program generation step of generating the part program from the generated cross-sectional shape and the designated measurement position. and

According to the present invention, a part program can be automatically generated in a simple procedure at a low cost even without CAD data of a workpiece, by virtue of the functions and effects as described with respect to the automatic part program generation device for a roundness measuring machine. can be done.

According to the present invention, there is provided a roundness measuring device that can automatically generate a part program in a simple procedure at low cost without CAD data of a workpiece, an automatic part program generating device for a roundness measuring machine, and an automatic generation method. can do.

1 is a schematic diagram showing an embodiment of a roundness measuring apparatus of the present invention; FIG. 3 is a block diagram showing the measurement control device of the embodiment; FIG. FIG. 4 is a schematic diagram showing an edge detection process of the embodiment; The figure which shows the display screen of the edge detection position of the said embodiment. The figure which shows the estimation screen of the one-sided contour shape of the workpiece|work of the said embodiment. The figure which shows the display screen of the cross-sectional shape of the workpiece|work of the said embodiment. The figure which shows the specification screen of the measurement position of the said embodiment. 4 is a flow chart showing processing executed in the embodiment;

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows a roundness measuring device 1 according to the invention.
The roundness measuring device 1 includes a roundness measuring machine 2 and a measurement control device 10 for controlling it.

The roundness measuring machine 2 has a rotary table 3 on which a workpiece W to be measured is placed, and a probe 4 capable of measuring an arbitrary surface position of the workpiece W. As shown in FIG.
The probe 4 is supported by a column 5 and can be displaced along the X-axis (horizontal direction in the figure) and Z-axis (vertical direction in the figure) by a moving mechanism installed on the column 5 .
The rotary table 3 is rotatable around a rotation center axis C extending in the Z-axis direction, and is rotationally driven by a drive motor housed in the body case 6 .

The measurement control device 10 is configured by a computer system such as a so-called personal computer, and by executing a measurement program, can cause the roundness measuring machine 2 to execute the measurement operation described in the measurement program.
As shown in FIG. 2, the measurement control device 10 has a display unit 11 such as a display panel, an operation unit 12 such as a keyboard and a mouse, and a part program automatic generation unit 20 and a measurement operation control unit 30 which are both configured by software. have
Here, the part program automatic generation unit 20 of this embodiment corresponds to the part program automatic generation device of the present invention.

The part program automatic generation unit 20 includes an edge detection unit 21 for detecting edges (edges E1 to E3 in FIG. 3) of the work W, and a cross-sectional shape of the work W (cross-sectional shape H in FIG. 6) from the positions of the detected edges. , a measurement position specifying unit 23 that specifies measurement positions (measurement positions M1 and M2 in FIG. 7) in the generated cross-sectional shape, and from the generated cross-sectional shape and the specified measurement position and a part program generator 24 for generating a part program.

The edge detection unit 21 detects edges of the workpiece W. FIG.
In FIG. 3, the workpiece W is a rotating body having a large-diameter extension portion W2 in the middle of a small-diameter shaft portion W1. , and the peripheral edge of the lower surface of the extended portion W2 is an edge E3.
The edge detector 21 issues a command to the roundness measuring machine 2 to move the probe 4 and detect the positions of the edges E1 to E3. For example, the contactor (tip of the stylus) of the probe 4 is brought into contact with the peripheral surface near the upper surface of the extension W2 and moved upward to detect the edge E1 and record its X-axis position, Z-axis position and angular orientation. do. Since edge E1 is detected by moving it upward, it is an upward corner. Similarly, the X-axis position, Z-axis position and angular orientation of edges E2 and E3 are recorded. Edge E3 is recorded as a downward angle because it is detected by moving the contactor of probe 4 downward.

The cross-sectional shape generation unit 22 generates a cross-sectional shape of the work W from the positions of the edges E1 to E3 detected by the edge detection unit 21. FIG.
As shown in FIG. 4, the cross-sectional shape generation unit 22 refers to the X-axis position and the Z-axis position detected by the edge detection unit 21, and plots edges E1 to E3 on a virtual plane developed on the memory. At the same time, the image of the virtual plane including the edges E1 to E3 is displayed on the display section 11 of the measurement control device 10. FIG.

As shown in FIG. 5, the cross-sectional shape generation unit 22 creates a rectangle (including a square) having the rotation center axis C as one side and the positions of the edges E1 to E3 as vertices for the plotted edges E1 to E3. assign.
For example, since the edge E1 is an upward corner (periphery of the upper surface of the extension W2), a rectangle R1 having one side along the rotation center axis C and extending downward is assigned to the edge E1. The lower side of the rectangle R1 is the 0 position of the Z axis.

Similarly, edge E2 is an upward corner and is assigned a downward extending rectangle, and edge E3 is a downward corner and is assigned an upward extending rectangle. However, since the edges E2 and E3 have the same X-axis position, the rectangles assigned to them are treated as one, and a rectangle R2 having two vertices is assigned to each. That is, the rectangle R2 has one side along the rotation center axis C and upper and lower sides passing through the edges E2 and E3.

Due to these rectangles R1 and R2, one side contour shape Hh of the work W (the contour shape appearing on one side of the rotation center axis C in the cross-sectional shape H of the work W) is formed on one side of the rotation center axis C (on the right side in FIG. 5). is generated.
As shown in FIG. 6, by inverting the one-sided contour shape Hh obtained on one side of the rotation center axis C with the rotation center axis C as an axis, the cross-sectional shape H of the workpiece W is generated on both sides of the rotation center axis C. be done.
Through the above processing, the cross-sectional shape H of the workpiece W is generated from the information on the edges E1 to E3 in the cross-sectional shape generating unit 22. FIG.

The measurement position designation unit 23 designates a measurement position, that is, a position to be measured on the work W with respect to the cross-sectional shape H of the work W generated by the cross-sectional shape generation unit 22 .
As shown in FIG. 7 , the measurement position designating section 23 displays the cross-sectional shape H on the display section 11 of the measurement control device 10 . Then, the measurement positions M1 and M2 are designated by the pointer 13 on the screen, for example, by the user's operation from the operation unit 12 . The measurement positions M1 and M2 are Z-axis position information specifying the measurement trajectory of the workpiece W, which is a rotating body, and X-axis position specification information is ignored.
In the example shown in FIG. 7, the "rotational measurement element" and the "linear measurement element" are selectable. Rotational measurement is the measurement of roundness, etc., by rotating a rotary table. It is to move to and measure. In FIG. 7, the user has selected "rotation measurement element".

The part program generation unit 24 uses the cross-sectional shape H of the work W generated by the cross-sectional shape generation unit 22 as a reference, and refers to the measurement positions M1 and M2 designated by the measurement position designation unit 23 to determine the measurement positions of the work W. A part program describing the operation of measuring M1 and M2 with the probe 4 is generated. An existing program creation procedure can be appropriately used to generate the part program.

Next, the operation of the roundness measuring device 1 of this embodiment will be described.
In FIG. 8, when performing the measurement operation by the roundness measuring device 1, the user first sets the workpiece W to be measured on the roundness measuring device 1 (process S1).
At the start of the measurement operation, the measurement control device 10 of the roundness measuring device 1 inquires about the automatic generation of the part program through a dialog or the like displayed on the display unit 11. In response, the user asks whether automatic generation is necessary. is selected (process S2).

When automatically generating a part program, the measurement control device 10 activates the part program automatic generation section 20 .
The part program automatic generation unit 20 operates the roundness measuring machine 2 by the edge detection unit 21, and detects the edge of the work W by the probe 4 (see FIG. 3, process S11). Next, the cross-sectional shape generator 22 displays the detected edges E1 to E3 on the screen (see FIG. 4, process S12), and displays rectangles R1 and R2 corresponding to the edges E1 to E3 (see FIG. 5, process S13), thereby generating the cross-sectional shape H of the workpiece W (see FIG. 6, process S14).

The part program automatic generation unit 20 displays the obtained cross-sectional shape H and confirms with the user whether it is appropriate or not (process S15). If the cross-sectional shape H is not appropriate, the user edits the figure on the screen to correct the cross-sectional shape H (process S16).
Next, the part program automatic generation unit 20 designates the measurement positions M1 and M2 to be measured on the cross-sectional shape H by the measurement position designation unit 23 (see FIG. 7, process S17), and the cross-sectional shape H and the measurement positions A part program is generated from M1 and M2 for measuring the corresponding position of the workpiece W with the probe 4 (process S18).

After the part program for the work W is generated, the measurement control device 10 activates the measurement operation control section 30 .
The measurement operation control unit 30 edits the measurement program including the part program of the workpiece W generated by the measurement program editing unit 31 (process S3), and the measurement operation command unit 32 performs true measurement based on the obtained measurement program. The operation of the circularity measuring machine 2 is controlled, and the probe 4 measures the workpiece W (process S4). The measurement operation of the workpiece W under the measurement operation command unit 32 can be repeatedly performed for a plurality of workpieces W having the same shape, and is terminated by end determination (process S5).

In the above-described process S2, when the user selects not to automatically generate a part program for the work W, such as when the part program has already been created, the processes S11 to S18 are omitted, and the process S2 immediately shifts to the process S3, and the measurement operation is performed. (processes S4 and S5).
Here, the processes S11 to S18 of this embodiment correspond to the part program automatic generation method of the present invention.

According to this embodiment described above, the following effects can be obtained.
In this embodiment, the workpiece W to be measured by the roundness measuring machine 2 is a rotating body, and its cross-sectional shape H is symmetrical with respect to the rotation center axis C. As shown in FIG. Therefore, if the contour shape of one side of the rotation center axis C of the work W can be generated, the overall cross-sectional shape can be grasped. The one-sided contour shape Hh of the workpiece is obtained by designating the edge portion of the workpiece W and performing edge detection along the rotation center axis C at the specified portion, thereby obtaining the positions of the detected edges E1 to E3 (Z-axis position and X-axis position) and the orientation of the edges E1-E3 (upward or downward).

Therefore, in this embodiment, the cross-sectional shape H of the work W can be generated by a simple procedure without CAD data of the work W. FIG. By designating the measurement positions M1 and M2 on the obtained cross-sectional shape H, a part program for designating the measurement operation of the roundness measuring machine 2 can be automatically generated.
As described above, in the present embodiment, by limiting the target of automatically generated part programs to the roundness measuring machine 2 in which the work W is a rotating body, the cross-sectional shape H of the work W can be easily generated. The cross-sectional shape H can be generated by existing processes such as edge detection and figure allocation, and these processes can also be executed by the measurement control device 10 configured with a general personal computer system.
Therefore, according to this embodiment, even if there is no CAD data of the workpiece W, the part program can be automatically generated in a simple procedure at low cost.

In this embodiment, the cross-sectional shape generator 22 generates a one-sided contour shape Hh of the workpiece W from the positions of the edges E1 to E3 detected by the edge detector 21, and the entire cross-section from the obtained one-sided contour shape Hh. A shape H is generated.
For this reason, in the present embodiment, it is sufficient to first generate a one-sided outline shape Hh on one side of the rotation center axis C, and the process of assigning the rectangles R1 and R2 can be performed only on one side. Efficient processing can be performed by taking advantage of the characteristics of the work W.

In this embodiment, the edge detection unit 21 records the Z-axis positions of the edges E1 to E3 along the rotation center axis C of the workpiece W and the X-axis positions that intersect the rotation center axis C. The orientations of the edges E1 to E3 are recorded, and the cross-sectional shape generation unit 22 assigns figures based on the Z-axis position, the X-axis position of the edges E1 to E3 and the orientations of the edges E1 to E3 detected by the edge detection unit 21. Thus, a one-sided contour shape Hh or a cross-sectional shape H is generated.
For this reason, in the present embodiment, when generating the cross-sectional shape H, by referring to the directions of the edges E1 to E3, the existence region of the cross-sectional shape H with respect to the positions of the edges E1 to E3 (either upper or lower side of the edges E1 to E3) presence) can be determined, and the generation of the cross-sectional shape H can be executed efficiently.

In the present embodiment, the cross-sectional shape generation unit 22 generates the one-sided contour shape Hh or the cross-sectional shape H by allocating rectangles R1 and R2 having the rotation center axis C as one side and the positions of the edges E1 to E3 as vertices. made it
Therefore, in the present embodiment, the cross-sectional shape H can be efficiently generated by using the rectangles R1 and R2 having the rotation center axis C as one side and the positions of the edges E1 to E3 as vertices.

It should be noted that the present invention is not limited to the above-described embodiments, and includes modifications within the scope of achieving the object of the present invention.
In the above-described embodiment, when generating the cross-sectional shape H in the cross-sectional shape generation unit 22, first, the rectangles R1 and R2 are assigned on one side of the rotation center axis C to generate the one-side contour shape Hh, which is reversed to create the cross-sectional shape Hh. It produced H. However, the generation of the one-sided contour shape Hh may be omitted, and for example, the cross-sectional shape H may be generated by allocating rectangles R1 and R2 having edges E1 to E3 as vertices and having line symmetry with respect to the rotation center axis C.

In the above-described embodiment, the rectangles R1 and R2 are assigned to generate the one-sided contour shape Hh, which is the preliminary stage of the cross-sectional shape H, but other figures may be used. For example, a figure in which the edges E1 to E3 are sequentially connected by a plurality of line segments (line segments parallel to and orthogonal to the axis of rotation), or parallel to the axis of rotation C so as to pass through the edges E1 to E3 may be used. A straight line and a straight line orthogonal to the rotation center axis C may be drawn, and a part thereof may be used to generate a figure connecting the edges E1 to E3.

INDUSTRIAL APPLICABILITY The present invention can be used for a part program automatic generation device for a roundness measuring machine, a roundness measuring device, and a part program automatic generation method for a roundness measuring machine.

DESCRIPTION OF SYMBOLS 1... Roundness measuring apparatus, 10... Measurement control apparatus, 11... Display part, 12... Operation part, 13... Pointer, 2... Roundness measuring machine, 20... Part program automatic generation part, 21... Edge detection part, 22... Cross-sectional shape generator, 23... Measurement position designator, 24... Part program generator, 3... Rotary table, 30... Measurement operation control unit, 31... Measurement program editor, 32... Measurement operation command unit, 4... Probe , 5... Column, 6... Body case, C... Rotation center axis, E1, E2, E3... Edge, H... Cross-sectional shape, Hh... Contour shape on one side, M1, M2... Measurement position, R1, R2... Rectangle, W... Work, W1... Shaft part, W2... Extended part.

Claims (6)

An automatic part program generation device for automatically generating a part program for causing a roundness measuring machine having a rotary table on which a work is placed and a probe capable of measuring an arbitrary surface position of the work to execute a predetermined measurement operation, ,
an edge detection unit that detects the position and orientation of the edge of the work along the rotation center axis of the work; a cross-sectional shape generation unit that generates a cross-sectional shape of the work from the detected position and orientation of the edge; and a part program generation unit for generating the part program from the generated cross-sectional shape and the designated measurement position. Part program automatic generation device for roundness measuring machine. In the part program automatic generation device for the roundness measuring machine according to claim 1,
The cross-sectional shape generation unit generates a one-side contour shape of the workpiece from the position and direction of the edge detected by the edge detection unit, and generates the cross-sectional shape from the obtained one-side contour shape. Part program automatic generation device for roundness measuring machine. In the part program automatic generation device for a roundness measuring machine according to claim 1 or claim 2,
The edge detection unit records the Z-axis position of the edge along the rotation center axis of the workpiece and the X-axis position intersecting the rotation center axis, and records the orientation of the edge with respect to the rotation center axis,
The cross-sectional shape generation unit generates the cross-sectional shape by assigning figures based on the Z-axis position, the X-axis position, and the direction of the edge of the edge detected by the edge detection unit. Part program automatic generation device for roundness measuring machine. In the part program automatic generation device for the roundness measuring machine according to claim 3,
The cross-sectional shape generation unit generates the cross-sectional shape by allocating a rectangle (including a square) having the rotation center axis as one side and the position of the edge as the vertex. Part program automatic generation device. A roundness measuring machine having a rotating table on which a workpiece is placed and a probe capable of measuring an arbitrary surface position of the workpiece, and a measurement control device that causes the roundness measuring machine to execute the measurement operation described in the measurement program. and
The measurement control device has a part program automatic generation unit that automatically generates a part program that can be used for the measurement program,
The part program automatic generation unit includes an edge detection unit that detects the position and orientation of the edge of the work along the rotation center axis of the work, and generates a cross-sectional shape of the work from the detected position and orientation of the edge. a measurement position designating unit that designates a measurement position in the generated cross-sectional shape; and a part program generation unit that generates the part program from the generated cross-sectional shape and the designated measurement position. A roundness measuring device comprising: An automatic part program generation method for automatically generating a part program for causing a roundness measuring machine having a rotary table on which a work is placed and a probe capable of measuring an arbitrary surface position of the work to execute a predetermined measurement operation, comprising: ,
an edge detection step of detecting the position and orientation of the edge of the work along the rotation center axis of the work; a cross-sectional shape generation step of generating a cross-sectional shape of the work from the detected position and orientation of the edge; and a part program generation step of generating the part program from the generated cross-sectional shape and the designated measurement position. How to automatically generate a part program for a roundness measuring machine.

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