JP4659651B2 - CAD / CAM device, CAD / CAM device program, and CAD / CAM data editing method - Google Patents

Description

  The present invention relates to a CAD / CAM device, a CAD / CAM device program, and a CAD / CAM data editing method for a processing device for cutting processing such as a laser processing machine and a plasma cutting machine. The present invention relates to a technique for improving the efficiency of a work for appropriately editing a shape portion unsuitable for processing in processing data creation processing after reading shape data included.

  When cutting the shape of an iron plate or stainless steel plate with a laser processing machine using character shape data created on a personal computer or shape data generated by reading characters written on paper with a scanner, Alternatively, when a design shape as a decorative object is processed into an iron plate, a stainless steel plate, or the like, a CAD / CAM device having a form as shown in Patent Document 1 is generally used for data processing.

  Examples of shapes to be processed include character shapes created with a personal computer as shown in Fig. 9, characters written with a brush on calligraphy paper read with a scanner, or created as decorative objects by a designer. There are design shapes and so on.

  The shape data captured on the screen of the CAD / CAM device is in a state in which the contour of the shape is extracted as shown in FIG. 10 by the function of the CAD / CAM device or by the processing in the previous stage. Yes. This outline is constituted by, for example, a continuous line or arc. That is, the process of converting the painted monochrome image data as shown in FIG. 9 into the contour extraction vector data as shown in FIG. 10 is realized as a known function.

  When image data is converted into vector data, the vector data is generally composed of a continuous line segment including only a straight line and an arc, and does not include a line segment such as a spline curve. Therefore, the curved portion or the like in the original diagram is constituted by a continuous arc connection having an approximate curvature, for example. As a result, there is a slight curvature error, and when both the original drawing and the contour extraction shape are overlapped, there is a case where a slight deviation occurs because they do not completely match. Note that the above vector data composed of a straight line and a circular arc extracted from the contour is generally formed as a closed loop shape composed of a plurality of line segments (including a perfect circle).

  FIG. 11 is an enlarged view showing a part of FIG. In FIG. 11, there are minute line segments having a length of 2 mm or less particularly at three positions (1), (2), and (3) indicated by arrows. More specifically, there are one minute line segment in each of the parts (1) and (2), and as many as eight minute line segments exist in the part (3). This is caused by faithfully extracting the contour of the shape of FIG. 9 which is the original diagram so as to reduce the error.

  FIG. 12 is an enlarged view of a part of FIG. In FIG. 12, each of the portions (1) and (2) indicated by arrows has a minute straight line of 2 mm or less. When cutting such a shape with a laser processing machine, etc., if it is a thin plate, it can usually be processed at a relatively high speed, but the portion composed of minute line segments and the minute line segments are continuous. Even if it is a thin plate, the processing speed decreases due to the limit of the processing performance of processing control, so it is ideal to reduce the number of occurrences of parts composed of such line segments as much as possible. . For example, as shown in FIG. 13-1, a part composed of three continuous minute straight lines may be combined into one arc, or a minute line segment may be deleted as shown in FIG. 13-2. Process.

  When editing a minute line segment as described above with a conventional CAD / CAM device for a processing machine, the operator manually edits the corresponding part manually using an input means such as a mouse and edits it. If the result is not appropriate, it is dealt with by repeating the operation such as making another edit result or restoring it.

  On the other hand, as known automatic processing on a computer, there is one disclosed in Patent Document 2, for example. This is a process of automatically thinning out unnecessary teaching points when the interval between teaching points for robot operation is smaller than a preset value. It is also conceivable to apply this processing function as graphic processing on the CAD / CAM device and automatically thin out, ie delete, a line segment shorter than a preset value. .

  Also, another patent document 3 discloses a technique of deleting so that data is thinned out when a data distance interval is a predetermined length or less. Still another patent document 4 discloses a technique of thinning out the configured line segments and connecting the lines with straight lines to reduce the amount of data.

  Here, if the processing for reducing the amount of data to be thinned out using the above-described known technique is applied to the processing shape editing processing of the CAD / CAM device, the following problems occur. For example, with respect to the state of FIG. 12, a thin line is automatically thinned out or deleted in a straight line having a length of 2 mm or less, an arc having a circumference of 2 mm or less, or an arc having a radius of 1.5 mm or less even if the circumference is longer than 2 mm. If the process of performing is performed, it will be in a state as shown in FIG. That is, as shown in FIG. 14, the line segments of the arrows (1) and (2) disappear and the continuity is lost. Therefore, continuity must be maintained in some way. For example, regarding the portion (1) in FIG. 14, the two arc line segments constituting the front and rear of the corresponding minute line segment are extended to the point where they intersect each other. Further, with respect to the portion (2) in FIG. 14, one arc and one straight line constituting the front and back of the corresponding minute line segment are extended to the point where they intersect each other. When such processing is performed, a result as shown in FIG. 15A can be obtained.

  On the other hand, if the arc shape is not extended as it is, but a straight line is extended in the tangential direction at the end portion of the arc shape and the intersection point on the extension is obtained, the result shown in FIG. 15-2 can be obtained. . However, in the part (2) of FIG. 15-2, a new straight line of 1.614 mm is newly generated by this process, and this result cannot be adopted.

  The problem here is, first, (a) the continuity of the line segment is interrupted by applying a process of simply deleting the shape based on the length of the line segment using known means as described above. It is to end up. In addition, when editing processing such as simply extending the line segments before and after the line segment is applied in order to maintain continuity, as shown in (1) of FIG. When a change in shape that affects visual recognition occurs, or as shown in (2) of FIG. 15-2, (c) a minute line that needs to be newly deleted Minutes may occur. Furthermore, as shown in the portion (1) of FIGS. 15-1 and 15-2, a considerably sharp figure is generated at the tip portion. (C) Processing by heat from a laser processing machine or the like. When cutting with a force such as a punch press machine or the like, there is a problem that heat and force are concentrated on the tip portion and a good cutting result cannot be obtained.

Japanese Patent No. 2584229 (FIG. 6) JP 61-48006 A JP-A-6-83525 JP-A-3-175523

  As described above, the conventional CAD / CAM apparatus does not have a function of automatically thinning out or editing a minute line segment shape part appropriately, so that complicated editing work by an operator's manual work is not performed. There was a problem that it occurred.

  In addition, even when considering the realization of a function of automatically thinning out minute line segments of a predetermined length or less as automatic processing on a computer by applying a known technique, human visual perception is affected. This problem is applied due to the characteristics of the cutting process, the problem that the shape changes, the small line segment that needs to be deleted automatically occurs, and it cannot be applied. There was a problem that it was not possible.

  The present invention has been made in order to solve such problems, and as an automatic processing on a computer without requiring a complicated operation by an operator, while avoiding the occurrence of a shape portion that causes a problem in cutting processing, it has an adverse effect on processing. An object of the present invention is to obtain a CAD / CAM device, a CAD / CAM device program, and a CAD / CAM data editing method capable of reducing the number of minute line segments that appear.

  In the CAD / CAM apparatus according to the present invention, the storage means for storing a contour shape formed by a plurality of continuous line segments while matching the start and end points, and one minute line segment exists in the contour shape. If the minute line segment is not continuous before and after the line segment, the minute line segment is deleted, and the line segment before and after the minute line segment is extended in the direction of the part from which the minute line segment is deleted. And a partial editing means for reshaping the contour shape by extending to the intersection.

  In the CAD / CAM apparatus program according to the present invention, a storage procedure for storing a contour shape formed by a plurality of continuous line segments while matching the start and end points, and the stored contour shape are read out, and one of the contour shapes is read out. When a minute line segment exists and the minute line segment is not continuous before and after the minute line segment, the minute line segment is deleted, and the minute line segment is deleted from the preceding and following minute line segments. An editing procedure is described, which extends in the direction of the part and reshapes the contour shape by extending to the intersection of both line segments and is executable by a computer.

  In the CAD / CAM data editing method according to the present invention, a storing step of storing a contour shape formed by a plurality of continuous line segments while matching the start and end points, and reading out the stored contour shape, one of the contour shapes is read out. When a minute line segment exists and the minute line segment is not continuous before and after the minute line segment, the minute line segment is deleted, and the minute line segment is deleted from the preceding and following minute line segments. And an editing step of reshaping the contour shape by extending in the direction of the portion and extending to the intersection of both line segments.

  Here, the expression “a plurality of continuous line segments with matching start and end points” means that the end point of the first line segment matches the start point of the second line segment, and the end point of the second line segment is 3. This indicates that the line segments are continuous such that the start point of the third line segment coincides with the end point of the third line segment and the start point of the fourth line segment.

  According to the present invention, as the automatic processing on the computer without the need for complicated operations by the operator, the number of minute line segments that have an adverse effect on the processing is reduced while avoiding the generation of a shape portion that causes a problem in cutting processing. Can be made.

  Embodiments of a CAD / CAM device and a program for a CAD / CAM device according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a flowchart showing a graphic data processing procedure of a CAD / CAM device for a processing machine according to Embodiment 1 of the present invention. FIG. 2 is a block diagram showing a hardware configuration of the CAD / CAM device for a laser beam machine according to Embodiment 1 of the present invention. In FIG. 2, a CAD / CAM device 100 generates graphic data based on various input data, analyzes a cutting direction and cutting conditions, and generates cutting information and the like, and an input A memory 102 that is a storage means for storing software necessary for creating / drawing graphic data and printing information such as cutting information and screen display contents, and printing such as printers and plotters Device 103, display device 104 such as CRT (Cathode Ray Tube) or liquid crystal display capable of displaying predefined graphic data, cutting path, cutting condition, input request message, etc. on the screen, shape data, cutting condition, etc. A keyboard 105 as an input means for inputting various data, and graphics and menus displayed on the display device 104 A mouse 106 as a pointing device for selecting an external storage device 107 such as a hard disk drive that stores a software or predefined graphic data, and are connected by a bus line 109. In addition, a processing device such as a laser processing machine may be connected to the bus line 109 via a cable or the like.

  Next, the operation will be described along the flowchart of FIG. First, after fetching graphic data for which vectorization processing has been completed, there is a minute line segment that is determined to be inappropriate by the “step S1: minute line segment presence / absence search” processing of FIG. A search is performed, and if even one is confirmed, the location is specified.

  FIG. 3 shows a list of various means configured on the software used in the present invention. In the process of step S1, “M01: Fine line segment search means” in FIG. 3 is used. With respect to the search processing in step S1, in the conventional CAD / CAM apparatus, if the length, start point / end point coordinates, and angle information of all elements existing in the drawing area are straight lines, arcs are used. If the length information, the radius information, the coordinates of the start point / end point, and the angle information of the center angle are true circles, the information of the radius and the center coordinates is obtained and managed.

  Here, as shown in the above [Background Art], for example, there is a straight line or an arc having a length of 2 mm or less, or a length longer than 2 mm as a length of a minute line segment that has an adverse effect on processing. It is confirmed whether or not there is an arc having a radius of 1.5 mm or less. If there is no corresponding line segment, the determination in step S1 in FIG. 1 is negative and the process jumps to the final process in FIG. / Move to the next operation such as creating processing data on CAM.

  On the other hand, if there is a corresponding part in step S1 and the determination is affirmative, the process from step S2 is entered to reduce the number of corresponding line segments. In the shape change allowable range setting process in step S2, an allowable range for determining whether or not a large change unacceptable by the visual recognition of the operator occurs when the shape is changed by the subsequent editing process is set. For example, in contrast to the shape of FIG. 10 described above, FIG. 4-1 shows the shape of the left part of Hiragana “I” enlarged and reduced by 1 mm inward and outward from the original contour segment, respectively. Is drawn.

  Here, the reason why the width of the enlargement / reduction is set to 1 mm is, for example, that the maximum width of the figure in the shape of “i” in this hiragana is 100 mm, and that the figure changes up to 1%, that is, 1 mm. If it exists, the case where it is thought that it is a change of the grade accept | permitted visually is assumed. The value can be appropriately changed in advance by an operator, and can also be specified by a length or a ratio to the size of the entire figure, that is, a percentage.

  FIG. 4B is an enlarged view of the left side portion of Hiragana “I”. FIG. 4C is an enlarged view of a characteristic part surrounded by a circle in FIG. In FIG. 4B, a new shape that is simply enlarged / reduced with a width of 1 mm each is drawn inside and outside the originally formed shape, and the intersection position of the line segment that forms the new shape Alternatively, the closed shape formed by connecting at the intersection position on the extension is drawn along the outline of the original shape. This drawing is drawn as a reference shape in order to limit the allowable range of change in shape due to editing to a maximum of 2 mm (± 1 mm) when editing as appropriate in the processing after step S3. The

  In a conventional CAD / CAM apparatus, a function is provided for determining whether a line segment touches or intersects a specific line segment. For this reason, it is possible to determine whether or not the shape change is within an allowable range by applying this function. Here, since the shape indicating the allowable range is used for internal processing of the computer, it is not always necessary to display the shape as shown in FIG.

  As a method for setting the “shape change allowable range” in step S2, in the first embodiment, the contour line segment of the original figure is simply moved in parallel by 1 mm as described above. In particular, as shown in 4-3 (1), the position of the intersection on the extension is far away from the original figure position in the acute angle part, and the change of the shape is so great that human recognition is affected. However, it may be determined that it is within the allowable range. In addition, as shown in FIG. 4-4, there is a situation where the intersection point on the extension cannot be obtained. For example, as shown in FIG. 4-3 (2), the outside of the apex portion of the acute angle figure Assuming an arc that applies the length of the specified distance as the radius, an arc that touches the tip is obtained and defined as the editable range as shown in (3) of FIG. 4-3.

  Also, as shown in (1) of FIG. 4-3, when parallel translation is performed on the inside of the shape by 1 mm, which is the same amount as the outside, especially the inside is edited in a direction in which the shape becomes smaller, so Since the ratio of the dimensions to be edited increases and greatly affects human visual perception, the inner parallel movement distance is made smaller than the outer side as shown in (2) of Fig. 4-3. You can change the setting value inside.

  On the other hand, as another method for setting the “shape change allowable range”, as shown in (1) of FIG. 4-5, a new line segment parallel to the contour line segment of the original figure at a distance of 1 mm is simply used. Rather than drawing and connecting at the intersection position or the intersection position on the extension, in order to prevent the allowable range from spreading too far, especially on the outer part of the acute angle shape, parallel lines are provided at a distance of 1 mm without extension. After that, the shape generated by the process of generating a straight line in the tangential direction having the same length of 1 mm from the tip position and connecting the tips with a straight line may be set as the “shape change allowable range”. .

  As described above, a plurality of types of setting means are prepared for setting the “shape change allowable range” in step S2 so that the operator can designate appropriate means. In the process of step S2, “M02: shape change allowable range setting means” in FIG. 3 is used.

  In the operation shown in the flowchart of FIG. 1, when the fine line segment exists even at one location in the entire figure, the shape change is collectively performed on the entire figure in the shape change allowable range setting process in step S2. Although an example in which the allowable range setting process is performed is shown, in the minute line segment presence / absence retrieval process in step S1 and step S8 described later, only “M02: shape” is sequentially applied only to the position where the minute line segment is retrieved. The setting process by the “change allowable range setting means” may be applied. In this case, as shown in the flowchart of FIG. 6, the return position from step S8 is a position between step S1 and step S2.

  Next, a graphic editing process for reducing the minute line segment, which is the original purpose of the first embodiment, is performed in step S3 “extraction of relevant part and extraction of allowable range” in FIG. In this process, a plurality of types of graphic editing processing means are prepared in accordance with the number of continuous minute line segments at a place where one or more minute line segments exist continuously. In other words, when only one minute line segment exists alone, as shown in FIG. 5A, one line is deleted and the preceding and following line segments are positioned at the intersection points on the extension. 3 is used as the means shown in FIG. 3, and the editing result is stored in “M22: Shape storage means after editing”. .

  As another editing processing method of “M11: single partial editing means”, in the processing of simply extending the elements at both ends of the corresponding minute line segment as shown in FIG. Alternatively, as shown in FIG. 15-2, a process of extending a tangential straight line to the end points of the elements on both sides of the corresponding minute line segment and creating a figure up to the intersection on the extension can be selected. Alternatively, both means may be executed and stored as “M22: Edited shape storage means” as candidates that can be selected later by the operator.

  When only two of the minute line segments are continuous rather than one, one line that passes through the three points where the end points of the start and end points of each minute line segment are located as shown in FIG. “M12: Two-continuous partial editing means” composed of the arcs of In addition, when three lines are continuous, among the four points that are the end points of the start and end points of the continuous minute line segments, a total of three points including the two points at both ends and the midpoint of the central element are obtained. It is edited so as to be constituted by one passing arc, and this editing process is prepared as “M13: three continuous partial editing means” in FIG.

  In addition, when four lines are continuous, a process equivalent to “M12: Two-continuous partial editing means” is applied to each of two consecutive front and rear minute line segments. This may be prepared as “M14: four continuous partial editing means 1”, or the first, third and fifth of the total of five starting and ending points composed of four continuous minute line segments. A process of forming a single arc passing through three points may be applied, and this may be prepared as “M15: four continuous partial editing means 2”.

  Then, as the operation of “corresponding part editing and permissible range determination extraction” in step S3 in FIG. 1, the operation “M03: minute line in FIG. 3 is performed at the part where the minute line segment searched in step S1 exists. The “minute continuous number counting means” is used to count how many minute line segments are continuously present at that location. This is because it is connected even before and after one minute line segment searched in step S1, and the minute line segment is continuously present, or if there is, the total number is continuously counted before and after. Count.

  Then, for example, at a location where five or more lines are continuous, a combination of two consecutive lines in order from the shortest of the minute line segments at both ends is extracted, and “M12: two consecutive lines are sequentially extracted for the two minute line segments. "Partial editing means" is applied. At that time, if the number of continuous lines is an odd number, the above-mentioned “M13: three continuous partial editing means” is applied with the last three minute line segments remaining. In this way, the number of minute line segments is reduced at locations where five or more minute line segments exist continuously. In the above example, two pieces are extracted first, but three pieces are extracted first, and editing processing is performed in order from the end using “M13: three continuous partial editing means”. When the last four lines remain, edit with "M14: 4-continuous partial editing means 1" or "M15: 4-continuous partial editing means 2". A method may be used in which two are edited by “M12: two continuous partial editing means”. Alternatively, when the number of continuous line segments is large, instead of the above-described example of extracting three lines first, four lines are extracted first, and “M15: Four-line continuous partial editing means 2” is applied. In the case where the number is not divisible by 4, the above processing means may be applied as appropriate according to the last remaining number, and editing may be performed.

  In this manner, when the minute line segments are five or more consecutive parts, the preceding and following line segments are combined together to reduce the number of minute line segments. Even after this combination editing process has been performed once, "M01: fine line segment search means" is repeatedly applied to the part being edited this time, and if the minute line segment still exists, the process from M11 to M15 is performed. The means is repeatedly applied to perform editing processing as step S3. Of course, even if the number of continuous lines is 4 or less, the means from M11 to M15 are repeatedly applied to perform the process of reducing the minute line segment.

  In this way, the editing process is performed on all the minute line segments that are continuous before and after the portion where the minute line segment is searched in the previous step S1. Here, when a plurality of types of editing means are applied as processing on the computer so that the above-described graphic editing processing can be performed, the editing result is stored as one or a plurality of candidates by “M22: Shape-editing means after editing”. Is done.

  The processing in step S3 in FIG. 1 is completed as described above. Next, the current editing result stored in “M22: Shape-editing means after editing” in step S4 in FIG. 1 is set in step S2. It is determined whether or not there is an editing result that falls within the shape change allowable range at the location edited this time, and if there is at least one, as a process of step S6, the candidate graphic after editing is sequentially displayed on the screen by the operator's operation. The operator selects a result that is displayed and determined to be the best by visual judgment by the operator. In the process of step S4, “M21: Shape change allowable range inside / outside determination means” is used.

  If there is no shape selected in both steps S4 and S6, it is determined in step S5 that “M23: Edit the location” is appropriate because it is impossible to perform an appropriate edit on the location that was edited this time. `` Impossible mark setting means '' is used, and a mark that can be visually confirmed by the operator is set and displayed at the corresponding location, and this part is not recognized as a minute line segment that needs to be edited and is ignored in subsequent graphic editing processing. Is set.

  If the operator performs a selection procedure in step S6, the graphic editing process for that portion is confirmed in step S7, and a minute line segment that needs to be edited remains in another part of the entire graphic in step S8. If there is a portion that still remains, the process returns to step S3.

  As described above, according to the CAD / CAM device for a processing machine according to the first embodiment, it is not necessary to search and edit a portion that needs to be corrected in the figure by a complicated operation by visual confirmation of the operator, Since the change allowable range within / outside determination means is provided, it is not necessary for the operator to determine whether or not the editing result is appropriate.

  In the CAD / CAM device for a processing machine according to the first embodiment, an example of a process in which the operator performs visual determination for each location that needs to be corrected found by the search unit has been described. In this case, since the operation becomes complicated, the processing of step S6 and step S7 in FIG. 1 is postponed, and the processing for confirming whether there is an allowable range result at all the editing-necessary positions in the figure is performed first. Finally, the stored order of one or a plurality of candidate graphics may be arranged in the order of visual judgment by the operator.

  At that time, the number of times “M22: Shape-editing means after editing” is applied is counted, that is, the number of editing result candidate graphics generated by the processing on the computer is counted, and the number is visually exceeded by an operator such as 10 or more. If the required number of times increases too much, a mechanism may be provided in which the allowable range of “M02: shape change allowable range setting means” is reset to a value that narrows and the computer process is restarted. In order to realize this process, “M22: Edited shape storage means” is provided with a function of counting the number of operations of this means.

Embodiment 2. FIG.
The CAD / CAM device for a laser beam machine according to Embodiment 2 of the present invention has a closed loop shape, an open shape, or a point shape in which the area is less than or equal to a certain value or zero in the “M01: fine line segment search means”. It is assumed that the operator can specify whether or not to search, and the range to be searched can be set as appropriate, whether it is the entire figure or limited to the range selected and specified by the operator.

  Conventionally, when the paper on which the target shape is drawn is read by a scanner, etc., and the subsequent editing process is performed, the operator visually confirms unnecessary shapes after reading such as small dust or hair that has adhered slightly. A separate erasing operation was required. On the other hand, when reading characters written in black on paper with a brush with a scanner, there are shapes that should be read, such as ink splash points, in addition to the above-mentioned dust. The operator had to do it visually.

  On the other hand, if the means shown in the second embodiment is provided in combination, only the shape regarded as a minute dust can be excluded if it is in the whole figure, and the above-mentioned particularly in spite of the minute shape. It is possible to perform processing such as not applying a deletion function limited to a nearby region such as a brushstroke character shape.

  Specifically, as shown in FIG. 7, “M31: point shape application determination unit” that stores in advance whether or not to apply a point shape as a machining shape by an operator's operation, or has a small area or an area "M32: Application of closed loop area" which functions in combination with a means for preliminarily storing and setting a value for determining whether or not to apply a zero closed loop shape as a machining shape and a function of obtaining a closed loop area that a general CAD has conventionally possessed “M33: open shape application determination means” in which the operator stores in advance whether or not to apply the open shape as the machining shape, or the range in which each determination is applied is limited by a mouse or the like. Each means includes “M34: application range designating means” for designating the range.

Embodiment 3 FIG.
The CAD / CAM device for a laser beam machine according to Embodiment 3 of the present invention has a function of checking whether or not a graphic part that is sharper than an angle specified in advance is generated in the editing part in the editing result determination means. It has. In the third embodiment, since the figure is automatically edited instead of being operated by the operator, the shape is formed with an acute angle such that the arc and the arc or the arc and the straight line touch each other as shown in FIG. Since the portion may occur unintentionally by the operator, there is provided an editing result determination means for automatically detecting this portion instead of visual confirmation by the operator.

  Specifically, as shown in FIG. 8, an angle formed by an operator to store and set an angle that is determined to be an acute angle that causes a problem in machining, and an angle formed by an adjacent line segment that is commonly held by a general CAD are shown. “M41: acute angle shape determining means” that functions in combination with the desired function and sets and displays a mark that can be visually recognized by the operator at an acute angle than the set angle. Note that the application of this “M41: acute angle shape determination means” is not limited to the portion where the graphic has been edited by the processing described in the present invention, and the application range is expanded to the entire graphic including the edited portion. It doesn't matter.

  As described above, the CAD / CAM device for a laser beam machine according to the present invention avoids the occurrence of a shape part that causes a problem in cutting processing as an automatic processing on a computer without requiring a complicated operation of an operator. The number of minute line segments that have a negative influence on processing can be reduced, and various means shown in FIG. It is not necessary to search and edit by complicated work by visual confirmation of the operator, and since it has a shape change allowable range setting means and a shape change allowable range inside / outside determination means, the result was not suitable for editing by computer automatic processing. In this case, there is an effect that it is not necessary for the operator to make a judgment each time.

  The CAD / CAM device for a processing machine according to the present invention improves the efficiency of editing a shape portion that is not suitable for processing, particularly in processing data creation processing after reading shape data including a minute line segment. Suitable for use as a device.

It is a flowchart which shows the graphic data processing procedure of the CAD / CAM apparatus for processing machines which concerns on Embodiment 1 of this invention. It is a block diagram which shows the hardware constitutions of the CAD / CAM apparatus for processing machines which concerns on Embodiment 1 of this invention. It is a figure which shows the various means with which the CAD / CAM apparatus for processing machines which concerns on Embodiment 1 of this invention comprises. It is a figure which shows the example of a process of a shape change allowable range setting means, and in the figure of the left part of Hiragana "I", the shape expanded / reduced by the predetermined width | variety inside and outside each with respect to the original outline segment FIG. It is the figure which expanded and displayed the left side part of Hiragana "I" of FIG. 4-1. FIG. 4 is an enlarged view of a characteristic part surrounded by a circle in FIG. It is a figure explaining the situation where it becomes a result which cannot obtain | require the intersection on extension. It is a figure which shows the other example of a process of a shape change permissible range setting means. It is a figure which shows the example of a process of 1 minute line segment partial edit means. It is a figure which shows the example of a process of a minute line segment 2 continuous partial edit means. It is a flowchart which shows the other example of the graphic data processing procedure of the CAD / CAM apparatus for processing machines which concerns on Embodiment 1 of this invention. It is a figure which shows the various means with which the CAD / CAM apparatus for processing machines which concerns on Embodiment 2 of this invention comprises. It is a figure which shows the acute angle shape determination means with which the CAD / CAM apparatus for processing machines which concerns on Embodiment 3 of this invention comprises. It is a figure which shows the example of the character shape produced with the personal computer. It is a figure which shows the state comprised by the outline of shape data being extracted, and a straight line and a circular arc. It is the figure which expanded a part of FIG. It is the figure which expanded a part of FIG. It is a figure which shows the example which puts together the part comprised by three continuous minute straight lines to one circular arc. It is a figure which shows the example which deletes one minute line segment. It is a figure which shows the example which performed the thinning-out process automatically. It is a figure which shows the example in which the change of the shape which affects the recognition by human visual observation will generate | occur | produce. It is a figure which shows the example which the minute line segment which needs to delete newly generate | occur | produces.

Explanation of symbols

100 CAD / CAM equipment for processing machine 101 CPU
102 memory (storage means)
103 Printing Device 104 Display Device 105 Keyboard 106 Mouse 107 External Storage Device 109 Bus Line

Claims (21)

Storage means for storing a contour shape formed by a plurality of continuous line segments with matching start and end points, and in each line segment forming the contour shape , if the straight line is less than a specified length, the straight line Is a minute line segment, and when the arc is a specified curvature radius or less or the arc length is less than a specified length, the arc is defined as a minute line segment,
When one minute line segment exists in the contour shape and a line segment that is not a minute line segment is continuous before and after the minute line segment , the minute line segment is deleted and the minute line segment is deleted. A one-part editing means for re-forming the contour shape by extending the line segment before and after the line segment in the direction of the portion from which the minute line segment is deleted and extending to the intersection of both line segments ;
When there is a portion where two minute line segments exist continuously in the line segment forming the contour shape, the two minute line segments are deleted, and the start and end points of the two minute line segments are Two continuous partial editing means for re-forming the contour shape by connecting with one arc passing through three positioned points;
If there is a portion in which the three minute line segments exist in the contour shape, the three minute line segments are deleted and the four end points where the start and end points of the three minute line segments are located are deleted. And three continuous partial editing means for re-forming the contour shape by connecting with a single arc passing through two points on both sides and the middle point of the minute minute line segment in the middle. CAD / CAM equipment. The two continuous partial editing means sets the minute line segment when one arc passing through three points where the start and end points of the two minute line segments are located is equal to or less than a specified radius of curvature or less than a specified arc length, The outline shape is deleted by deleting the two minute line segments, extending the line segments before and after the minute line segment in the direction of the portion from which the minute line segment is deleted, and extending to the intersection of both line segments. The CAD / CAM device according to claim 1 , wherein the CAD / CAM device is reformed. In the three continuous partial editing means, one arc that passes through two points at both ends and the middle point of the middle minute line segment among the four points where the start and end points of the three minute line segments are located has a specified curvature. When the radius is less than or equal to or less than the specified arc length, the minute line segment is used, and the three minute line segments are deleted, and the line segments before and after the minute line segment are moved in the direction of the portion from which the minute line segment is deleted. The CAD / CAM device according to claim 1 , wherein the contour shape is reformed by extending and extending to an intersection of both line segments. If there is a portion where minute line segments are present to continue four communicating within said contour shape, as well as remove the four minute line segments, with respect to two before and after the four minute line segments, each 2 It further comprises first four continuous partial editing means for re-forming the contour shape by connecting with one arc passing through three points where the start and end points of the minute line segments are located. The CAD / CAM device according to any one of claims 1 to 3 . If there is a portion where minute line segments are present to continue four communicating within said contour shape, as well as remove the four minute line segments, five points start and end points of the four minute line segments are located 2. The apparatus according to claim 1, further comprising a second four-continuous partial editing means for re-forming the contour shape by connecting with one arc passing through the first, third and fifth. 4. The CAD / CAM device according to any one of items 1 to 3 . The point shape application determination means for storing and setting in advance whether or not to apply a point shape in the contour shape as a machining shape is provided, according to any one of claims 1 to 5. The CAD / CAM device described. Closed loop area application that functions in combination with a function for obtaining a CAD closed loop and stores in advance a value for determining whether or not to apply a closed loop shape having a small area or zero area in the contour shape as a machining shape further comprising the determination means, CAD / CAM apparatus according to any one of claims 1 to 5. And further comprising a open configuration application determination means stored in advance sets whether to apply the open shape as a machining shape, CAD / CAM apparatus according to any one of claims 1 7 . The range of applying the determining means, and further comprising a coverage designating means for designating a predetermined range, CAD / CAM apparatus according to any one of claims 6 to 8. Further comprising the sharp shape determination means for setting displaying a mark on its position if the edit portion or sharp geometric portion than predesignated angle to the whole figure has occurred, claims 1-9 The CAD / CAM device according to any one of the above. A storage procedure for storing a contour shape formed by a plurality of continuous line segments while matching the start and end points, and each straight line forming the contour shape includes a straight line that is less than a specified length. In the arc, in the arc, when the specified curvature radius or less or the arc length is less than the specified length, the arc is a minute line,
The stored contour shape is read out, and when there is one minute line segment in the contour shape and there are continuous line segments that are not minute line segments before and after the minute line segment , the minute line segment is An editing procedure for re-forming the contour shape by deleting the line segment before and after the minute line segment in the direction of the portion from which the minute line segment is deleted, and extending to the intersection of both line segments ,
When there is a portion where two minute line segments exist continuously in the line segment forming the contour shape, the two minute line segments are deleted, and the start and end points of the two minute line segments are A second editing procedure for re-forming the contour shape by connecting with one circular arc passing through three positioned points;
If there is a portion in which the three minute line segments exist in the contour shape, the three minute line segments are deleted and the four end points where the start and end points of the three minute line segments are located are deleted. A third editing procedure for re-creating the contour shape by connecting the two points on both sides and the middle point of the minute minute line segment by one arc, and is executable by a computer. CAD / CAM device program. The editing procedure for the portion where the two minute line segments are continuous is performed when one arc passing through the three points where the start and end points of the two minute line segments are located is less than the specified curvature radius or less than the specified arc length. The minute line segment is deleted, the two minute line segments are deleted, and the line segments before and after the minute line segment are extended in the direction of the portion from which the minute line segment is deleted, and extended to the intersection of both line segments. The CAD / CAM device program according to claim 11 , which can be executed by a computer that reshapes the contour shape. The editing procedure for the portion where the three minute line segments continue is that the two points at both ends of the four points where the start and end points of the three minute line segments are located and the middle point of the middle minute line segment 1 If the arc is less than the specified radius of curvature or less than the specified arc length, the minute line segment is deleted, the three minute line segments are deleted, and the line segments before and after the minute line segment are replaced with the minute line segment. 13. The CAD / CAM device program according to claim 12 , wherein the program is executable by a computer that reshapes the contour shape by extending in the direction of the deleted portion and extending to the intersection of both line segments. If there is a portion where minute line segments are present to continue four communicating within said contour shape, as well as remove the four minute line segments, with respect to two before and after the four minute line segments, each 2 claims 11 that is executable by further comprising computer editing procedure to reshape the contour shape by connecting a single arc passing through 3 points start and end points of the present of the small segment is located 13 The CAD / CAM device program according to any one of the above. If there is a portion where minute line segments are present to continue four communicating within said contour shape, as well as remove the four minute line segments, five points start and end points of the four minute line segments are located any one of the first and third and claim 11 which is executable by further comprising computer editing procedure to reshape the contour shape by connecting fifth at one arc that passes 13 of the The program for a CAD / CAM device according to item 1. 16. The method according to claim 11 , further comprising a determination procedure for storing in advance whether or not to apply a point shape in the contour shape as a machining shape, and capable of being executed by a computer. Program for CAD / CAM device. A determination procedure for storing in advance a value for determining whether or not to apply a closed loop shape having a small area or zero area in the contour shape as a machining shape by functioning in combination with a function for obtaining a CAD closed loop The CAD / CAM device program according to any one of claims 11 to 16 , further comprising a computer and executable by the computer. The CAD / CAM device program according to any one of claims 11 to 17 , further comprising a determination procedure for storing in advance whether or not to apply an open shape as a machining shape, and capable of being executed by a computer. . The range of applying the determining step, further comprising computer CAD / CAM device program according to any one of the executable and claims 16 18 in the designation step for designating a predetermined range. Claims 11 that is executable by further comprising computer determines procedure for setting displaying a mark at that position when the edit portion or predesignated sharp geometric portion than the angle in the entire shape has occurred 19 The CAD / CAM device program according to any one of the above. A storage step of storing a contour shape formed by a plurality of continuous line segments while matching the start and end points, and each straight line forming the contour shape includes a straight line that is less than a specified length. The arc, and in the arc, when the specified curvature radius or less or the arc length is less than or equal to the specified length, the arc is the minute line,
The stored contour shape is read out, and when there is one minute line segment in the contour shape and there are continuous line segments that are not minute line segments before and after the minute line segment , the minute line segment is is deleted, the editing process of the front and rear segments of the fine small segments, extending in the direction of the deleted portions of the fine small segments to reform the outline shape by extending to the intersection of two line segments,
When there is a portion where two minute line segments exist continuously in the line segment forming the contour shape, the two minute line segments are deleted, and the start and end points of the two minute line segments are A second editing step for re-forming the contour shape by connecting with one arc passing through three positioned points;
If there is a portion in which the three minute line segments exist in the contour shape, the three minute line segments are deleted and the four end points where the start and end points of the three minute line segments are located are deleted. And a third editing step for re-forming the contour shape by connecting the two points on both sides and the middle point of the minute minute line segment by one arc. CAM data editing method.

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