JP2636046B2 - Digitized data processing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a digitized data processing apparatus for converting digitized data representing a model surface shape into data suitable for numerical control processing.

(Prior Art) Various plastic products and sheet metal products are mass-produced by dies. However, if these product shapes include free-form surfaces other than analytical surfaces such as flat surfaces and quadratic surfaces, the shapes may not be specified by mathematical expressions, etc. It was difficult to create a numerical control (hereinafter referred to as NC) machining program for producing a simple mold. Therefore, in the case of a mold having such a shape, a copying machine that creates a model shape in advance and processes a mold material while copying the surface thereof has been used. However, recently, a digitizing device that scans a model surface with a stylus, samples and outputs coordinate points of the model surface shape has been developed, and has become capable of performing NC machining instead of a copying machine. This is possible by converting the data format of the digitized data, which is the coordinate points of the model surface shape sampled by the digitized data device, and using it as an NC machining program. However, digitized data obtained by a digitizing device is obtained by digitizing a model shape using a scanning pattern defined by a scanning mode. Therefore, the model shape cannot be efficiently processed without using the digitized data.

FIG. 6 is a diagram showing digitized data obtained by measuring the rectangular parallelepiped shown in FIG. 5 in a scanning mode which is parallel to the y-axis direction and has a constant interval in the x-axis direction. In the figure, 0-16
The line corresponding to the number is a center locus when the stylus moves on the model surface, and is referred to as scan data, and is constituted by a series of minute straight lines. As described above, the digitized data is composed of a plurality of scan data. However, in FIG. 5, the scan data for processing the rectangular parallelepiped surfaces A and B is not included. ~ 1
The scan data of No. 4 is data in which the tool moves in contact with the ridgelines a and b of the rectangular parallelepiped, and the efficiency of the slab cutting was poor.

In order to solve the above-mentioned problems, a digitized data processing apparatus as shown in FIG. 7 has recently been provided, whereby it is possible to extract or delete digitized data in a desired area from the entire digitized data. It has become possible. That is, in the digitized data processing device shown in FIG. 1, digitized data is input from the digitized data input means 1, and a closed curve indicating an area defined on the xy plane and an extraction / decision for determining whether to extract or delete data in the area. The deletion designation is input from the area data input means 2.
The in-region determination unit 3 determines whether the xy coordinate value of the sampling point of the digitized data is inside or outside of the closed curve indicating the region. Digitized data is extracted and deleted by specifying extraction and deletion. The conversion means 5 extracts the extracted digitized data as an NC program.

FIG. 8A shows the digitized data in FIG.
It is a diagram showing Nos. 12 to 16 and a deletion area L (surrounded by a two-dot chain line), and FIG. 13B is a diagram showing a result of deleting the scan data portion of No. 14.

(Problems to be Solved by the Invention) By the way, as described above, at the beginning, data having a large distance between scan data generated in a stepped shape parallel to the scan direction of digitized data is high in accuracy and efficiency in NC processing. It was not preferable in terms of. The solution to this was the digitized data processing device described above. However, in this case, the operator had to specify a closed curve indicating the area, and for this purpose, the drawing of the model shape was interpreted in the coordinate system of the digitized data. Then, the coordinates of the closed curve had to be determined and input. Therefore, conventionally,
There is a problem that the operator is troublesome, the operation is too complicated, and there is a high possibility of an operation error.

The present invention has been made under the circumstances described above,
An object of the present invention is to provide a digitized data processing device capable of reducing the load on an operator and reducing operation errors.

(Means for Solving the Problems) In the present invention, a stylus is scanned a plurality of times on a model surface at a predetermined interval, and a minute straight line having a point at which a coordinate value of the model surface shape obtained for each scan is sampled as an end point. The present invention relates to a digitized data processing device for converting digitized data composed of scan data which is a series of the digitized data. The object of the present invention is to provide a digitized data processing device which converts the digitized data based on spatial density of scan data constituting the digitized data. This is achieved by extracting or deleting data.

(Operation) In the present invention, by performing extraction or deletion processing based on the spatial density of digitized data,
Easy conversion from digitized data to desired NC program.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of a digitized data processing apparatus according to the present invention. FIG. 2 is a diagram showing a processing procedure by the digitized data processing device of the present invention.
FIG. 3 is a diagram for explaining processing contents. FIGS. 4A and 4B are diagrams showing specific examples of processing by the digitized data processing device of the present invention.

In FIG. 1, the pick-to-pick associating means 6 sequentially inputs adjacent scan data from digitized data input through the digitized data input means 1, and generates a break point or a break point at an end point of a minute straight line constituting the scan data. Based on a shape characteristic such as a bend, a correspondence between an end point having the same shape characteristic of a minute straight line constituting scan data adjacent thereto is determined. If a point corresponding to a point on certain scan data does not exist on adjacent scan data, a corresponding point is created on a straight line between the points. Next, the pick-to-pick evaluating means 7 evaluates the distance between the points associated by the pick-to-pic associating means 6. Further, the data input means 8 inputs an extraction / deletion determination distance, and the extraction / deletion means 9 compares the distance between corresponding points evaluated by the pick-to-pick distance evaluation means 7 with the extraction / deletion determination distance. A portion having a large distance between scan data is deleted, and data of a small portion is extracted.

The above processing will be described in detail based on the processing procedure of FIG.

First, the digitized data to be processed and the extraction / deletion determination distance L are input (step S1). Next, a counter NS for sequentially processing all scan data of the digitized data is initialized (NS = 0) (step S2). Therefore,
By comparing the number of scan data of the input digitized data with the value of the counter NS, it is determined whether or not processing of all scan data is completed (step S3), and it is determined that processing of all scan data is not completed. If so, the counter NS of the scan data is incremented by 1 in order to perform the following processing on the next scan data (step S4).
Then, a counter NP for sequentially processing all points of the NS-th scan data is initialized (step S5).
Thus, by comparing the total number of points of the NS-th scan data with the value of the counter NP, it is determined whether the processing of all the point data has been completed (step S6), and the processing of all the points has not been completed. If it is determined, the point counter NP is incremented by 1 to perform the following processing for the next point (step S7). Therefore, as shown in FIG. 3, first, a corresponding point P- ₁ having the same shape feature on the NS-1st scan data with respect to the shape feature of the concave bending point at the NPth point is determined (step S1). S8). Next, the NP-th point and the corresponding point
Evaluate the distance 1 ns _-1 from P _-1 (step S9). Also, NP
A corresponding point P _{+ 1} having the same shape feature on the (NS + 1) th scan data is determined for the (th) point (step S1).
0). Distance then the NP-th point and the corresponding point P ⁺¹ l _{ns + 1}
Is evaluated (step S11). Therefore, this distance l _ns-1 , l
_{The ns + 1} is compared with a previously input extraction / deletion determination distance L (step S12), and it is determined whether to extract or delete the NP-th point. If the NP-th point is to be extracted, the NP-th point is stored. (Step S13). Step S8
Steps S13 to S13 are performed for all points. If it is determined in Step S6 that the processing of all point data has been completed, the process returns to Step S3. Also,
If it is determined in step S3 that the processing of all scan data has been completed, the data stored in step S13 is converted into a numerical control (NC) program and output (step S14).

As a specific example of the above processing, FIG.
The broken lines indicate the status of association in the digitized data Nos. 12 to 16 in FIG. In FIG. 4 (B), the portion on the scan data of No. 14 where the distance between the associated points is large is deleted.

The NC program output from the conversion means 5 through the above processing is only a portion corresponding to digitized data that can perform desired processing with good efficiency and accuracy.

(Effect of the Invention) As described above, according to the digitized data processing device of the present invention, the spatial density of digitized data, that is, the distance between adjacent scan data is determined, and data of only a high-density portion is extracted. The operator can easily convert the digitized data into a desired NC program only by inputting the determination distance for extraction / deletion, thereby reducing the load on the operator and reducing operation errors.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a digitized data processing device according to the present invention, FIG. 2 is a diagram showing a processing procedure by a digitized data processing device according to the present invention, and FIG. FIGS. 4 (A) and 4 (B) are views showing a specific example of processing by the digitized data processing device of the present invention, FIG. 5 is a view showing a rectangular parallelepiped to be digitized, and FIG. 6 is shown in FIG. FIG. 7 is a diagram showing digitized data for a rectangular parallelepiped, FIG. 7 is a block diagram showing the configuration of a conventional digitized data processing device, and FIGS. 8A and 8B are diagrams showing specific examples of processing by the conventional digitized data processing device. is there. 1 digitizing data input means, 2 area data input means, 3 area determining means, 4 selecting means, 5 means
... Conversion means, 6... Pick-to-pick correspondence means, 7... Pick-to-pick distance evaluation means, 8... Data input means, 9.
Deletion means.

Claims (2)

(57) [Claims] 1. A stylus is scanned a plurality of times on a model surface at predetermined intervals, and is constituted by scan data which is a series of minute straight lines having endpoints at points at which coordinate values of a model surface shape obtained at each scan are sampled. Digitizing data processing device for converting the digitized data
A digitized data processing apparatus, wherein the digitized data is extracted or deleted based on the spatial density of scan data constituting the digitized data. 2. An end point of a minute straight line constituting scan data of the digitized data, based on a shape characteristic such as a break point or a bend, corresponding to an end point having the same shape characteristic of a minute straight line constituting adjacent scan data. The pick-to-pick associating means for attaching, the pick-to-pick processing evaluating means to evaluate the distance between the individual scan data associated by the pick-to-pic associating means, and the inter-pick distance evaluating means. 2. The digitized data processing device according to claim 1, further comprising an extraction / deletion unit that performs the extraction or deletion based on a distance.