JP2786348B2 - Digitizing control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a stylus is brought into contact with a surface of a model to move a tracer head, and surface shape data of the model is obtained based on the obtained position coordinates of the tracer head and the amount of displacement of the stylus. The present invention relates to a digitizing control device that generates / outputs a numerical control machining program.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram showing an example of a conventional digitizing device. The scanning program SSP selected from the scanning program storage unit 2 in which the scanning program is previously stored by means of a scanning designation switch state DSW designated from the operation panel 1 or a paper tape is analyzed by the scanning program analysis unit 3. You. The scanning parameter data SPD and the scanning limit data SLD are determined based on the scanning parameter number and the scanning limit number specified in the analysis result SR sent from the scanning program analysis unit 3 to the scanning mode control unit 4.
Are read from the scanning parameter storage unit 5 and the scanning limit storage unit 6, and these data SPD,
Various scanning modes are controlled based on the SLD. Here, the control of various scanning modes is as follows.
NTC, surface reciprocation, surface one direction, contour circumference, contour part,
According to a three-dimensional scanning mode, a scanning plane, a speed, a region, and the like for each line are determined, and the scanning speed calculation unit 7 executes the scanning control.

According to a scanning mode control command SMC sent from the scanning mode control unit 4 to the scanning speed calculation unit 7, the displacement amount detection unit 14 when the tracer head 11 is brought into contact with the model 13 via the stylus 12 is detected. The operation of each axis of the digitizer main body 9 is controlled through the drive unit 8 so that the detected displacement SD of the tracer head 11 is always constant. Depending on the model shape, as shown in FIG.
It is also possible to perform scanning by inclining the tracer head 11 through 0. In this case, the displacement amount obtained by the displacement amount detection unit 14 is converted by the inclination angle processing unit 15 based on the inclination angle and the inclination direction of the head, and is sent to the scanning speed calculation unit 7. Thereby, correct scanning is performed even when the tracer head 11 is inclined.

As a result of such scanning control, the surface shape data DMS of the model is obtained from the current value SPP from the current value detector 16 and the displacement SD from the displacement detector 14, which are obtained by the tolerance processor 17. , After being subjected to data compression processing. Then, the NC program that can be processed by the NC machine tool is the floppy disk 19 or RS-232-
It is output to the processing machine side by communication 20 according to a protocol such as C.

[0005]

In the above-described conventional digitizing apparatus, when the tracer head is tilted in accordance with the model in order to scan a model having an inclined surface, the setting of the scanning parameter and the scanning limit requires X-. Since the tracer head could only control the direction in the negative Z direction in the area on the Y plane, the area on the side or back side of the model could not be defined. If the inclination angle was 90 ° or more, the appropriate scanning area Could not be set. Therefore, despite the development of a small and light type tracer head capable of scanning at an angle of 90 ° or more, a tilt scanning function that effectively utilizes such a tracer head cannot be used.

For example, when scanning the model 13 as shown in FIG. 10, there is a limit to the inclination angle of the tracer head, so that it is necessary to incline and reset the model 13 side to scan the side surface. A great deal of man-hours were required for a simple setup change. The present invention has been made under the circumstances described above, and the object of the present invention is to
It is an object of the present invention to provide a digitizing control device capable of scanning a side surface and a back surface of a model without tilting the model.

[0007]

According to the present invention, a tracer head is moved by bringing a stylus into contact with the surface of a model,
The present invention relates to a digitizing control device that obtains surface shape data of the model based on the obtained position coordinates of the tracer head and the amount of displacement of the stylus, and generates / outputs a numerical control machining program. The above object is to provide a storage means for storing a scanning parameter for defining a scanning method and a condition for each plane of XY, ZX, and YZ, and a scanning limit for defining a range of scanning. Plane selecting means for selecting the scanning parameter and the scanning limit corresponding to the designated plane, and front and back selecting means for selecting any of the front and back in the designated plane, the selected scanning parameter, the scanning limit and the designated plane Perform scanning control according to the front and back Thus, or, X-Y, Z-X, Y
A determination means for determining a scanning direction and a scanning area for each plane of -Z, a scanning parameter for defining a scanning method and a scanning condition, and a scanning limit for defining a scanning range; And a front and back selection means for selecting one of the front and back surfaces in the designated plane and sending the selected data to the discrimination means corresponding to the designated plane. This is achieved by performing the scanning control by determining the scanning direction and the scanning area according to the scanning parameters, the scanning limit, and the front and back sides in the designated plane.

[0008]

According to the present invention, the scanning control corresponding to the angle of the tracer head inclined in accordance with the shape of the model can be performed by specifying a side surface such as a ZX plane or a YZ plane and a front / back specification function. It is possible.

[0009]

FIG. 1 is a block diagram showing an example of a digitizing control device according to the present invention in correspondence with FIG. 8, and the same components are denoted by the same reference numerals and description thereof will be omitted. The storage unit for each data of the scanning parameter and the scanning limit is 5A and 6A for the XY plane, and 5B and 6 for the ZX plane.
It is provided for every three planes of 5C and 6C for B, YZ planes. On the other hand, a command for specifying a scanning plane as shown in the following example is added to the scanning program. TPSL [Z0]: Designation of scanning on the front side of XY plane TPSL [Z1]: Designation of scanning on the back side of XY plane TPSL [Y0]: Designation of scanning of the front side of ZX plane TPSL [Y1]: Designation of scanning on the back side of ZX plane TPSL [ X0]: Designation of scanning on the front side of the YZ plane TPSL [X1]: Designation of scanning on the back side of the YZ plane Further, designation of the XY, ZX, and YZ planes on the operation panel 1A and scanning of the front / back sides are also performed. A switch that can be specified has been added.

The plane designating data DSF designated by a command or a switch in accordance with the inclination direction / angle of the tracer head 11 is sent to the plane selecting section 4B via the scanning program analyzing section 3A, and the scanning parameters and the scanning parameters corresponding to the designated plane are obtained. The scanning limit is selected and transferred to the scanning mode control unit 4A. Then, the scanning mode control unit 4A based on the transferred scanning parameters and scanning limits for the designated plane and the front / back designation data DSB from the scanning program analysis unit 3A obtained via the front / back selection unit 4C. Controls various scanning modes. In mounting the tracer head 11 at an angle, by changing the mounting angle / direction of the tracer head 11, the relative position between the position of the stylus 12 and the mounting center position of the tracer head 11 changes. For this reason, a tilt head position correction unit 16A for correcting the present value obtained as a result of scanning by this changing value is newly provided, and tilt head correction based on the tilt angle / direction of the tracer head 11 and the length of the rotating part is provided. To obtain data on the correct model surface position.

According to the digitizing control device of the present invention described above, it is possible to scan the side surface / back surface of the model without changing the setting on the model side. There is a problem that it becomes expensive. FIG. 2 is a block diagram showing an example of the digitizing control device of the present invention that solves the above-described problem in correspondence with FIG. 1, and the same components are denoted by the same reference numerals and description thereof will be omitted. The scanning direction discriminator and the scanning area discriminator are XY plane 4
D, 4E, 4F and 4G for the ZX plane, and 4H and 4I for the YZ plane. The plane designation data DSF designated by a command or a switch according to the inclination direction / angle of the tracer head 11 is sent to the plane selection unit 4B via the scanning program analysis unit 3A, and the scanning direction discrimination unit and the scanning corresponding to the designated plane are designated. Scanning parameter SP for area discriminator
D and the scanning limit SLD are transferred. The scanning direction discriminating unit and the scanning area discriminating unit are obtained based on the transferred scanning parameters SPD and scanning limit SLD, and the front / back designation data DSB from the scanning program analyzing unit 3A obtained via the front / back selecting unit 4C. Scanning direction at
The determination of the area is performed, and a command such as a scanning direction and a limit for each scanning line obtained as a result is applied to the scanning speed calculation unit 7 to perform scanning on the designated plane.

Next, an example of the operation of the operator in each of the above embodiments will be described with reference to the flowchart of FIG. First, the operator determines a region to be scanned, and sets the tracer head 11 via the dedicated inclined adapter 10 in accordance with the angle of the model surface in this region (step S1). The inclination angle / direction at this time is determined by the structure of the inclination adapter. For example, as shown in FIG. 4, the inclination angle θ is an arbitrary angle position of 0 ° to 120 °, and the horizontal direction angle Φ is 0 ° to 360 °. Some can be set at any angle position. The tilt adapter may be set at a fixed stepped position instead of an arbitrary angle. For example, there is an adapter that can be set in eight directions at a 45 ° pitch in the horizontal direction.

Next, the set tracer head 1
A tilt angle and a direction of 1 are input (step S2). In the input, the angle can be directly input, but in the case of setting at a stepped position, the angle can also be input using a code or the like representing each position. Then, a scanning plane is determined according to the inclination angle of the tracer head, and a scanning parameter and a scanning limit in the corresponding plane are input. (Step S
3). Next, the plane to be scanned is set on the operation panel or NC.
Designation is performed by a program (step S4), and scanning is performed using the designated plane (step S4).
5), scanning in the designated area is completed. Then, it is determined whether or not scanning of all the areas has been completed (step S6). If scanning of all the areas has not been completed, the processing from steps S1 to S5 is repeated until scanning of all the areas has been completed. The process ends.

According to each of the above-described embodiments, the head is tilted by 90 ° or more without changing the setting on the model side as shown in FIG. 5 and the side portion of the model as shown in FIG. It is possible to scan the back surface of the model as shown. In each of the above-described embodiments, the case where the setting of the tracer head, the input of the tilt angle / direction, and the like are performed manually is described. However, the function of automatically setting the tracer head to the tilt position or the function of setting the tracer head to an arbitrary angle / Scanning parameters and scanning limits corresponding to a designated plane are stored in advance using means for positioning in an arbitrary direction by NC control or the like. It is also easy to realize unmanned operation at.

[0015]

As described above, according to the digitizing control device of the present invention, the tracer head can be tilted at an arbitrary angle to perform scanning control on a model having an arbitrary surface angle. It is possible to reduce wasteful time for setup change such as resetting, and to greatly improve the digitizing efficiency of the model including the side surface / back surface portion.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a digitizing control device according to the present invention.

FIG. 2 is a block diagram showing an example of a digitizing control device of the present invention obtained by improving the device of the present invention shown in FIG. 1;

FIG. 3 is a flowchart illustrating an operation example of an operator in the apparatus of the present invention.

FIG. 4 is a perspective view showing an example of a tilt adapter used in the device of the present invention.

FIG. 5 is a diagram showing an example of scanning by the apparatus of the present invention.

FIG. 6 is a perspective view showing an example of side scanning by the apparatus of the present invention.

FIG. 7 is a perspective view showing an example of back surface scanning by the apparatus of the present invention.

FIG. 8 is a block diagram showing an example of a conventional digitizing control device.

FIG. 9 is a perspective view showing an example of scanning by a conventional apparatus.

FIG. 10 is a diagram showing a problem of scanning by a conventional apparatus.

[Explanation of symbols]

 4B Plane selection unit 4C Front / back selection unit 4D, 4F, 4H Scanning direction determination unit 4E, 4G, 4I Scanning area determination unit 5A, 5B, 5C Scanning parameter storage unit 6A, 6B, 6C Scanning limit storage unit

Claims (2)

(57) [Claims] 1. A stylus is brought into contact with a surface of a model to move a tracer head, and surface shape data of the model is obtained based on position coordinates of the tracer head and an amount of displacement of the stylus, and numerical control processing is performed. In a digitizing control device for generating / outputting a program for use, a scanning parameter for defining a scanning method and a condition for each plane of XY, ZX, YZ and a scanning limit for defining a range of scanning are stored. Storage means, and a plane selecting means for selecting the scanning parameters and scanning limits corresponding to a specified plane of the planes, and a front and back selection means for selecting any of the front and back in the specified plane,
A digitizing control device, wherein scanning control is performed in accordance with a selected scanning parameter, a scanning limit, and front and back sides in a designated plane. 2. A tracer head is moved by bringing a stylus into contact with the surface of a model, and surface shape data of the model is obtained based on the obtained position coordinates of the tracer head and the amount of displacement of the stylus. In a digitizing control device for generating / outputting a program for use, a discriminating means for discriminating a scanning direction and a scanning area for each of XY, ZX, and YZ planes, and a scanning method for defining a scanning method and a condition. A plane selecting means for selecting a scanning limit for defining a parameter and a scanning range and sending the selected plane to the discriminating means corresponding to a specified plane among the planes; and Front and back selecting means for transmitting to the discriminating means corresponding to the designated plane. A digitizing control device, wherein a scanning direction and a scanning area are determined in accordance with a scanning parameter, a scanning limit, and a front and back of a designated plane to perform scanning control.