JPH06210547A - Automatic tool route data connection device - Google Patents

Abstract

PURPOSE:To provide an automatic CL data connecting device with which CL data can be connected to each other in the optimum form automatically. CONSTITUTION:A central processing unit 1 sets a point at which a distance from a tool is the shortest and at which cutting motion is allowed, if any exists, among points at four corners of a line group composing CL data for effecting for plural effective cutting blocks as a possible work start point in a work surface, and in connecting the CL data for effecting in each effecting cutting block from a specified reference point the effective cutting block having the set possible work start point is connected last to be stored in a memory device 3. The connection-processed connected CL data are set in inverse order to be CL data in actual work to be outputted to an NC machine tool 7 through an in/out control device 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CAD / CAM system or the like, which utilizes, for example, a design drawing of a work piece, an NC milling machine or a machining center or the like.
The present invention relates to a tool path data automatic connection device for creating tool path (CL) data to be given to a C machine tool.

[0002]

2. Description of the Related Art Conventionally, in CL data creation processing, crushing CL data for cutting a crushed region along a path of a plurality of lines and CL data such as contour CL data for cutting a contour are linked. In order to connect the CL data, for example, to find the machining starting point of the field (machining surface), a person grasps the design drawing of the workpiece by using an automatic programming system, etc. CL data in a form that avoids interference between the
Were connected.

[0003]

As described above, the prior art is as follows.
The CL data linking process was performed manually, but the CL data linking process is performed while grasping the design drawing of the workpiece and avoiding tool interference and shortening the processing time. For example, in order to optimize the connection of CL data, it is necessary to create CL data that requires complicated techniques and enormous amount of time when the shape is complicated, and in some cases the processing time becomes long. There was a problem of being lost.

The present invention has been made under such circumstances, and an object thereof is to provide an automatic tool path data connecting device capable of automatically connecting CL data in an optimum manner. .

[0005]

In order to achieve the above object, a tool path data automatic connecting device according to the first invention is provided.
For crushing tool path data consisting of a plurality of lines belonging to one machining surface, crushing tool path connecting means for connecting the crushing tool path data of the plurality of lines,
Contour tool path connecting means for connecting the contour tool path data to each other for a plurality of contour tool path data belonging to one machining surface, connected tool path data connected by the crushing tool path connecting means, and the contour tool It is provided with connecting tool path data connected by the path connecting means, or different tool path connecting means for connecting the existing tool path data for contour.

In order to achieve the above object, an automatic tool path data connecting device according to a second aspect of the present invention is, in addition to the above-mentioned constituent elements of the first aspect of the invention, a tool path data relating to connection belonging to machining surfaces having different machining heights. It has a high and low surface tool path connecting means for connecting each other.

In order to achieve the above object, an automatic tool path data connecting device according to a third aspect of the invention, in addition to the above-described components of the first or second aspect of the invention, is for an open contour belonging to one machining surface. When there are a plurality of tool path data, in all combinations of the two open contour tool path data, the end point of one open contour tool path data and the other open contour tool path The first point of setting the starting point of the other open contour tool path data relating to the combination having the longest distance from the data starting point as a reference point for connecting the tool path data on the machining surface Has a setting means.

To achieve the above object, an automatic tool path data connecting device according to a fourth aspect of the present invention, in addition to the above-described constituent elements of the first, second or third aspect, is in a closed state belonging to one machining surface. When there are a plurality of contour tool path data of the contour, a predetermined point of the contour tool path data in the closed state on the outermost peripheral side is set as a reference point for linking the tool path data on the machining surface. Has a setting means.

To achieve the above object, a tool path data automatic connecting device according to a fifth aspect of the present invention is provided with a first, a second, a third,
Alternatively, in addition to the above-described components of the fourth aspect of the invention, when only the crushing tool path data belongs to one machining surface, a tool is selected from the four corner points of the line group forming the arbitrary crushing tool path data. Has a third setting means for setting an arbitrary point having the shortest distance, allowing linear movement of the tool, and permitting cutting movement as a reference point for connecting tool path data on the machining surface. .

In order to achieve the above object, a tool path data automatic connecting device according to a sixth aspect of the present invention is, in addition to the above-mentioned constituent elements of the first or second aspect of the invention, the first setting means and the second setting means.
And the third setting means, both of which are the first
Setting means> second setting means> third setting means in order of priority so as to set a reference point for connecting the tool path data.

In order to achieve the above object, an automatic tool path data connecting device according to a seventh aspect of the present invention relates to a distance between a plurality of smashing blocks and a tool among the four corner points of a line group constituting the crushing tool path data. Is the shortest
If there is a point where cutting movement is permitted, this point is set as a machining start point candidate on the machining surface.
Setting means and the crushing tool path data of each crushing block from a predetermined reference point are sequentially connected, the crushing block having the machining start point candidate set by the fourth setting means is finally connected. The crushing block connecting means and the first output means for outputting the connected tool path data connected by the crushing block connecting means in reverse order as tool path data for actual machining.

In order to achieve the above object, in an automatic tool path data linking device according to an eighth aspect of the present invention, in addition to the above-mentioned constituent elements of the seventh aspect of the invention, the machining start point candidate is set by the fourth setting means. If there is no crush block,
It has the 2nd output means which outputs that.

[0013]

In the first invention, the crushing tool path connecting means is
Regarding the crushing tool path data composed of a plurality of lines belonging to one machining surface, the crushing tool path data for the plurality of lines are connected. At this time, the crushing tool path connecting means performs the connection in a path that avoids the tool interference when the tool interference occurs when the connection is performed by the straight path. Also,
The smashing tool path connecting means performs the connecting process before the contour tool path connecting means.

Further, the contour tool path connecting means connects the contour tool path data with respect to a plurality of contour tool path data belonging to one machining surface. At this time, the contour tool path connecting means, when there are a plurality of open contour tool path data, can connect the open contour tool path data together, or the connecting destination can drop the tool. In this case, the cutting path that the tool moves in the cutting state,
Of the non-cutting paths in which the tool moves in the non-cutting state, the path having the shorter tool moving time is selected to connect the tool path data of the contour.

The different tool path connecting means includes the connected tool path data connected by the crushing tool path connecting means, the connected tool path data connected by the contour tool path connecting means, or the contour tool path data existing independently. To connect. At this time, the dissimilar tool path connecting means selects the path for which the tool moving time is shorter among the cutting path where the tool moves in the cutting state and the non-cutting path where the tool moves in the non-cutting state for crushing tool path connection. The connecting tool path data connected by the means, the connecting tool path data connected by the contour tool path connecting means, or the independently existing tool path data for the contour is connected.

The crushing tool path connecting means, the contour tool path connecting means, and the dissimilar tool path connecting means perform connection while sequentially setting connection points indicating connection positions with tool path data to be connected next. The crushing tool path data, the contour tool path data, and the tool path data related to the connection that can be moved in the shortest time from the set connection point are sequentially connected.

The high and low surface tool path connecting means of the second invention comprises:
Tool path data related to connection belonging to processing surfaces having different processing heights are connected to each other. At this time, the high and low surface tool path connecting means sequentially connects the tool path data belonging to the machining surface located at the shortest distance from the set connection point.

In the first setting means of the third invention, when there are a plurality of open contour tool path data belonging to one machining surface, all combinations of two open contour tool path data. Among the above, the contour of the other open state relating to the combination in which the distance between the end point of the contour tool path data of one open state and the start point of the contour tool path data of the other open state is the longest The starting point of the tool path data for use is set as a reference point for connecting the tool path data on the machining surface.

According to the second setting means of the fourth invention, when there are a plurality of closed contour tool path data belonging to one machining surface, the closed contour tool path data on the outermost peripheral side. Is set as a reference point for connecting the tool path data on the machining surface.

In the third setting means of the fifth invention, when only the crushing tool path data belongs to one machining surface,
Among the points at the four corners of the line group that make up arbitrary crushing tool path data, the point that has the shortest distance to the tool, that allows linear movement of the tool, and that allows cutting movement is the tool path on the machining surface. Set as a reference point for data connection.

In the sixth invention, the first setting means, the second setting means, and the third setting means are provided together, and the control means is the first setting means> the second setting means> Control is performed so that the reference point for connecting the tool path data is set according to the priority of the third setting means.

In the seventh invention, the fourth setting means has the shortest distance to the tool among the four corner points of the line group forming the crushing tool path data for each of the crushing blocks and the cutting movement. If there is a point that is allowed, the point is set as a processing start point candidate on the processing surface.

Also, the crushing block connecting means has a crushing point having a machining start point candidate set by the fourth setting means when sequentially connecting the crushing tool path data of each crushing block from a predetermined reference point. Concatenate blocks last.

Then, the first output means reversely outputs the connected tool path data connected by the crushing block connecting means as tool path data at the time of actual machining.

The second output means of the eighth invention, when there is no crushing block for which the machining start point candidate has been set by the fourth setting means, outputs it by displaying, printing or the like to notify the operator of that fact. To do.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a CL data automatic connection device according to an embodiment of the present invention. This CL data automatic connection device performs a tool path (CL) data connection process with the central processing unit 1 as a core. The central processing unit 1 includes an input device 2 including a keyboard, a mouse, etc., a semiconductor memory, A storage device 3 such as a magnetic disk, an input / output control device 4, and a display device 5 such as a graphic display are connected.
The input / output control device 4 includes an external storage medium 6 including a magnetic tape, a floppy disk, a magnetic disk, and the like.
The NC machine tool 7 is connected and the input / output control device 4
Under the control of the central processing unit 1, outputs the tool path (CL) data connected by the CL data automatic connection apparatus to the NC machine tool 7, or various applications for connecting the tool path data from the external storage medium 6. Control such as loading a program in the storage device 3 is performed.

The storage device 3 stores data corresponding to CAD figure elements (coordinate values of start point / end point in the case of a two-dimensional line segment, coordinate values of start point / end point / center in the case of a two-dimensional arc, and a rotation direction,
In the case of a two-dimensional circle, the geometric information sufficient for determining the graphic element such as the center coordinate and the radius and the set information and the arrangement information of the graphic element) and the closed area data obtained by connecting the CAD graphic elements to form a closed area , 2.5-dimensional data in which information such as depth direction such as height is added to the closed area, tool data such as shape and use condition of machining tool, machining method data such as machining method, tool CL data indicating a moving route is stored.

A menu is displayed on the display device 5 under the control of the central processing unit 1, and the menu is displayed on the keyboard,
The CL data linking process can be carried out in an interactive manner while selecting and instructing with the input device 2 such as a mouse. At this time, the central processing unit 1 reads the application program selected / instructed from the menu from the external storage medium 6 into the storage device 3 via the input / output control device 4, and according to the application program, various CL data is read. Perform concatenation processing.

At this time, the central processing unit 1 similarly causes the storage device 3 to store the above-mentioned graphic data, processing data, tool data, etc. input by the input device 2, or the external storage medium 6. Save it. When saved in the external storage medium 6, the graphic data, machining data, tool data, etc. selected / instructed from the menu are read from the external storage medium 6 into the storage device 3 via the input / output control device 4, and necessary. In accordance with the above, the data is displayed on the display device 5, and CL data concatenation processing is performed using these data.

Next, the CL data connecting operation will be described with reference to FIGS.
It will be described in detail based on. The CL data connection is
As will be apparent from the description below, the process is sequentially performed from the upper field to the lower field. Here, the field is one processing surface f4 of a set of processing surfaces (surfaces having the same processing height) as shown by reference numeral f3 in FIG. 7 when processing a region.

FIG. 2 is a general flow chart showing an outline of the CL data linking operation. The central processing unit 1 first executes the last target field (the target field is the CL data linking process from now on). It is determined whether or not the CL data linking process (meaning the machined surface to be processed) has been completed (step S1). As a result, if the processing is completed, it means that the CL data connection processing has been performed over all the fields, so the processing ends.

On the other hand, the CL data in the last field of interest
If the connection processing has not been completed yet, a field one layer below the previously set target field is set as the target field (step S2). Then, the edit reference point of the CL data in the set attention field is calculated (step S3). The edit reference point calculation of this CL data is performed as follows. That is, a hatch (a line that should be a tool path during the crushing process) f2 in the crushing block as indicated by the symbol f1 in FIG. 3 on the field of interest.
Or a state in which CL data of the contour is calculated (each C
In a state where L data and the like are stored in the internal storage device 3, an edit reference point serving as a reference point for connecting the CL data of the crushed block and the CL data of the contour is calculated and stored in the storage device 3. To do. It should be noted that in the present embodiment, the CL data of the crushed block and the CL data of the contour are processed assuming that there are 0 or more each.

Here, CL data is the movement path of the tool,
Means data such as moving speed and tool diameter, and CL for crushing
The data means a set of tool movement paths (hatch, line) indicated by reference numeral f2 in FIG. 3 when machining a certain aggregated portion (crushed block) in the area, and CL data of the contour is the contour of the area. It means the movement path of the tool when cutting.

FIG. 4 shows the CL data in step S1 of FIG.
10 is a subroutine showing in detail the edit reference point calculation processing of the data.

In this subroutine, first, the storage device 3
By referring to the CL data of the contour of the field of interest stored in (4), it is judged whether or not the CL data of the contour includes open processing (step S31). As a result, if there is open processing in the CL data of the contour, the edit reference point corresponding to the case where there is open processing in the CL data of the contour is calculated (step S32). Return to the general flow.

The calculation of the edit reference point in step S32 is performed by
Do the following: That is, in the CL data of the contour of the field of interest, for all combinations of two open-ended CL data whose end points and start points are close to each other, the end point of one open-ended CL data and the other The distance between the start points of the CL data for open processing is calculated, and the start point side of the most distant combination is used as the edit reference point. In the case of the present embodiment, the processing for continuously registering the CL data of two contours in which the start point of the CL data of one contour and the end point of the CL data of another contour are close to each other is performed in advance. End point of contour CL data in the order of registration of CL data,
The distance from the CL data start point of the next contour may be obtained.

If there is no open machining as a result of the discrimination in step S31, is there CL data of the contour which is not open machining (CL data of the contour of normal machining) in the CL data of the contour of the field of interest? It is determined whether or not (step S33). As a result, the CL of the contour that is not open machining
If there is data, the editing reference point calculation processing corresponding to the case where there is CL data of the contour which is not open processing is executed (step S34), and the process returns to the general flow of FIG. Specifically, the approach point of the CL data of the contour of the outer peripheral loop is used as the editing reference point.

Here, the open machining means machining of the contour so that the tool path (CL) is not closed or becomes discontinuous. Therefore, the CL data of the open processing is composed of CL data of one or more contours. Also, one area has one outer loop and 0
There are more than one inner circumference loop. Further, the approach point of the loop means a point at which the tool starts cutting movement so as to cut the contour of the loop. In this embodiment, the approach point of the loop is calculated in advance for each loop.

As a result of the discrimination in the step S33, if there is no CL data of the contour which is not the open machining, the focused field is detected.
It is determined whether or not there is crushed CL data in the field (step S35). As a result, if there is crushed CL data, that is, if there is only crushed CL data, the edit reference point corresponding to the case where there is only crushed CL data is executed (step S36). Return to 2 general flow. In this case, the edit reference point is calculated as
Specifically, an appropriate point among the four corner points of the hatch of the appropriate crushed block is used as the edit reference point. In the present embodiment, the upper left points of the four corners of the hatch are used as editing reference points (point P2 in FIG. 5).

When it is determined in step S35 that there is no crushing CL data, that is, when there is neither crushing CL data nor contour CL data in the field of interest,
The process of connecting the CLs in the field of interest is not performed and the process ends.

In step S1 of FIG. 2, C as described above is used.
When the calculation process of the edit reference point of the L data is completed, it is determined in step S4 of FIG. 2 whether the crushed CL data is in the field of interest. As a result, if there is crushed CL data, the processing order of the crushed block is calculated (step S5).

The calculation of the processing order of the crushed blocks is performed according to the flowchart of FIG. The outline of the flow in FIG. 6 will be described first, and then the details will be described.

The processing order of the crushed blocks is calculated so that the crushed blocks are processed from the processing start point of the target field and finally the editing reference point can be processed in as short a time as possible. In the present embodiment, when calculating the processing order of the crushed blocks, first, as a pre-processing, in the CL data concatenation processing, a crushed block that can be processed in a short time from the editing reference point is searched in the reverse of the processing order. To go. At this time, the processing is performed so that the processing end point of the squeezing block finally reached becomes the processing start point candidate of the field. As a result, the machining start point candidate of the field of the smashing block finally reached becomes the machining start point of the field where the tool can be lowered. After that, the order is reversed to determine the processing order of the crushed blocks. CL data and the like calculated in the process of searching the crushed blocks that can be processed in a short time are stored in the storage device 3 and used in the subsequent steps.

Here, the processing start point of the field of interest is
As shown at f6 in FIG. 7, it means the point where the tool moves vertically from the previous field or the initial position of the tool, and the tool such as the area of the hole previously drilled for cutting is It is necessary to be within the descent area.
Further, the machining start point candidate of the focused field means a point in the area where the tool closest to each of the four corner points of each crushing block can descend, and becomes a candidate of the machining start point of the focused field. At the same time, when processing the crushed block having the processing start point candidate of the field of interest, when the tool moves between two points, it is possible to move above the sky.

As the tool movement mode between two points, cutting movement, air cutting movement, and sky movement are supported in this embodiment. Here, the cutting movement means moving between two points at a predetermined cutting speed in a cutting state on a field of interest as shown in FIG. 8A, and the tool and the shape must interfere with each other. If there is interference, it moves along the tool center locus in which the contour of the machining area is offset inward by the tool radius, while avoiding interference. In addition, the air-cut movement means that the distance between two points is the field of interest + air-cut height, and the air-cut speed moves, and the method of avoiding interference is the same as the cutting movement.

Further, as shown in FIG. 8 (b), the movement in the sky means a rapid movement between two points at the maximum height of the shape + the height of the sky. It is not necessary to consider interference when moving above the sky. The values stored in the storage device 3 are referred to for the cutting speed, the air cut height, the air cut speed, the maximum height of the shape, the height of the sky, and the fast feed.

Next, the processing start point candidate calculation processing for the field of interest in step S51 of FIG. 6 will be described in detail with reference to FIGS.

First, in step S511, it is determined whether or not there is a crushed block for which a process for calculating a machining start point candidate of a field of interest described later has not been performed.
As a result, if an unprocessed crushed block remains, the processing start point calculation of the noted field focuses on the unprocessed crushed block (step S512). It should be noted that in the present embodiment, attention is paid to the registration order from the head smashing block.

Then, the point on the descent possible area that is the shortest distance is calculated for each of the four corner points of the crushed block of interest (step S513). In this calculation, the end points of the descent possible area of the tool at the shortest distances from the four corners of the hatch of the above-mentioned crushed block are stored in the storage device 3 as the machining start point candidates of the noted field. . The end points of the descent possible area of the tool located at the shortest distance from the four corner points of the hatch of the crushing block are CAs such as line segments and arcs of the boundary of the descent area of the tool.
It is obtained by calculating the point where the distance between the D graphic element and the points at the four corners of the hatch is the shortest.

For example, in FIG. 5, if the hatched portion is the descent area of the tool, the end points of the descent area of the tool at the shortest distances from the four corner points P1, P2, P3 and P4 are respectively. P1 ', P2', P3 ',
It becomes P4 '.

Next, regarding each pair of the point calculated at step 513 and the point at the four corners of the crushing block, the below-mentioned discrimination processing as to whether or not the tool can perform cutting movement while avoiding interference between the pairs is performed for all pairs. It is determined whether or not it is completed (step S514). As a result, if completed, the process returns to step S511, and it is determined whether or not there is an unprocessed crushed block for the calculation processing of the processing start point candidate of the target field. On the other hand, if not completed, the next unprocessed pair is focused on (step S515).

Next, between the next unprocessed pair, that is, between one of the four corner points of the hatch and the pair of points in the descent possible area of the shortest tool corresponding to that point, the tool Determines whether the cutting movement can be performed while avoiding interference (step S516). As a result, if the tool can perform cutting movement between the pair while avoiding interference, the point in the descent possible area of the tool with the shortest distance is set as the processing start point candidate of the field of interest (step S517). It should be noted that the CL data for connection between the pairs calculated in performing this determination (f in FIG. 11).
8) is stored in the storage device 3 and used in the subsequent processing.

Here, a case where the tool cannot move by cutting while avoiding interference will be described with reference to the example of FIG. In FIG. 19, the height of the field of interest F is <50>, and the processing height of one of the four corner points PA of the smashing block is also <50>.
And one of the four corner points PA of the hatch of the crushing block B and the end point PA ′ of the descent area of the tool.
The target shape height (working height) of the portion S between and is <10.
It is assumed that 0>. In this case, when the cutting movement is performed between the point PA and the point PA ′, the portion having the processing height of <100> is cut, and a shape different from the target shape is processed. Therefore, the cutting movement cannot be performed between the point PA and the point PA '.

After the processing of step S517, the processing end point is calculated when the processing start point candidate of the focused field relating to the setting is set as the processing start point of the crushed block (step 518). At this time, the four corner points of the crushing block, which is the other end point of the pair (machining start point of the hatch element: f9 in FIG. 11), crushing machining end point (f1 in FIG. 11).
0), processing time, and crushed CL data (Fig. 11).
The circled numbers and f8) and the like are stored in the storage device 3 and are used in the processing described later. After that, by returning to step S514, a determination process of whether or not the tool can perform cutting movement while avoiding interference between all pairs is performed. The calculation of the processing end point in step 518 is performed by executing the CL data concatenation process in the block shown in FIG.

If it is determined in step S516 that the tool cannot perform cutting movement between the pair of interest while avoiding interference, the points at the four corners of the crushed block in the pair of interest are set to the machining start points of the crushed block. Then, the processing end point is calculated, and the processing start point of the crushing, the processing end point of the crushing, the processing time, and the CL data of the crushing (see FIG. 1).
1 and the like are stored in the storage device 3 (step S5).
19), which will be used in the processing described later. Then, step S5
Return to 14.

Next, FIG. 12 shows the processing contents in step S518 of FIG. 10, that is, the calculation processing of the processing end point when the processing start point candidate of the field of interest is set as the processing start point of the crushed block. It will be described in detail together with the CL data concatenation processing in the crush block.

In the CL data connection process (calculation process of the processing end point) in the crushing block, first, the processing start point of the hatch element indicated by reference numeral f9 in FIG. 11 is changed to the hatch element (the odd number in FIG. 11) in the crushing block. The lines indicated by the circled numbers are connected to set the start point as the start point for creating the crushed CL (step S5181). As the hatch element for which the first current position is set, the hatch element closest to the processing start point candidate of the focused field is selected (see symbol f9 in FIG. 11).

Next, CL data that moves from the set current position to the other end on the hatch element (line) where the current position is set is created, and the end point of the CL data (corresponding to the other end) is created. Update and set as the current position (step S
5182). Then, it is determined whether or not CL data has been created for all hatch elements in the crushed block (step S5183).

As a result, if there is a hatch element for which CL data has not been created, the end point of the hatch element with the shortest distance from the current position is found from the remaining hatch elements, and the end point is interfered with. The CL data for the connection for cutting and moving is created (step S5184). Then, by returning to step S5182, the CL that moves on the hatch element (line) having the shortest distance from the current position.
Create the data.

On the other hand, when the CL data has been created for all hatch elements, the end point on the opposite side to the point where the current position of the CL data created last is set, that is, the connected crushed CL. The end point (f10 in FIG. 11) opposite to the machining start point of the hatch element of the data is set as the machining end point of the crushed block (step S51).
85), and returns to the flow of FIGS.

At step S511 of FIG.
When it is determined that the processing for calculating the processing start point candidate of the field is performed for all the crushed blocks on the target field, it is determined whether there is the processing start point candidate for the target field (step S520). . As a result, if there is a processing start point candidate, the process directly returns to the flow of FIG. On the other hand, if there is no machining start point candidate, the symbol f in FIG.
As indicated by 11, a predetermined mark indicating that is displayed at the four corner points of the smashing block displayed on the display device 5 (step S521), and the process returns to the flow of FIG.

From this display, the operator recognizes that the machining start point candidate of the crushed block cannot be automatically set, that is, the tool cannot be lowered to machine the crushed block, To make a hole to lower the tool to the crushing block position,
It is possible to give an instruction to the NC machine tool 7 using the input device 2 and then input the machining start point of the field of interest using the input device 2. When it is determined that there is no machining start point candidate because the tool is too large to descend due to the hole being drilled, a small tool is designated by the input device 2 to start machining of the field of interest. The point candidates may be set so that the labor for enlarging the holes may be omitted. In addition, before returning to the flow of FIG. 6, the number of crushed blocks having the processing start point candidate of the attention field is changed to
It is stored in the storage device 3 as the initial value of the number of smashing blocks having the processing start point candidates of the field of interest that has not been connected.

After the above processing is completed and the flow returns to the flow of FIG. 6, C calculated in step S3 of FIG.
The edit reference point of the L data is set as the focused connection point (step S52 in FIG. 6). At this time, at the same time, whether or not the edit reference point can be lowered is set in the storage device 3 as a descent possible flag of the connection point of interest and used in the subsequent processing. Here, the target connection point means a point serving as a reference for connecting the next crushed block.

Next, with reference to the crushed CL data stored in the storage device 3, it is determined whether there is a crushed block whose processing order is undetermined (step 53). as a result,
If there is a crushed block whose processing order is undetermined, the crushed block that can be processed in the shortest time from the target connection point is searched as the next crushed block to be connected (step S).
5). Note that, as a smashing block to be connected next, when a smashing block having a processing start point candidate of the target field is searched and connected, as described later, each time, a target field that has not been processed is connected. Decrement the number of crushed blocks that have the processing start point candidates of one by one.

In the above-mentioned search process for the connection target,
As the crushing block to be connected last, the processing start point candidate of the focused field, that is, the point where the tool can descend is the processing end point in the crushed block. -Select a block that has a processing start point candidate of the field.

Such a selection method is realized by performing the search process for the next block to be connected based on the flowchart of FIG.

That is, in FIG. 14, first, referring to the current number of unconnected smashing blocks having the processing start point candidates of the field stored in the storage device 3 as described above, the focused field is referred to. It is determined whether or not there is only one unconnected squeezing block having a processing start point candidate for the field (step S541). As a result, the remaining unconnected smashing block having the processing start point candidate of the focused field is 1
If so, it is determined whether or not the concatenating process to be performed next is the final concatenating process of the smashing block in the field (step S542).

As a result, if it is not the final concatenation process, a plurality of unconcatenated crushed blocks are left in order to leave a crushed block having a processing start point candidate of the field of interest as a crushed block for final concatenation. Among the crushed blocks having no processing start point candidate of the focused field among them, the crushed CL data in the storage device 3, the focused connecting point, the crushing processing time, etc. are referred to and the An unconnected smashing block that can be processed in a short time is searched and set as the next object to be connected (step S543),
It returns to the flow of FIG.

On the other hand, if the concatenation process to be executed next is the final concatenation process of the smashing block in the field, the processing of the field of interest left for the final concatenation by the process of step S543. An unconnected smashing block having a start point candidate is searched and set as the next object to be connected (step S544), and the process returns to the flow of FIG.

When it is determined in step S541 that there are a plurality of unconnected smashing blocks having the processing start point candidates of the target field, the crushing CL data in the storage device 3, The smashing block that can be processed in the shortest time from the target connection point is searched with reference to the connection point, the crushing processing time, etc. (step S545). 1
There are four machining paths from one machining start point to one machining end point for each crushed block.

As a result of such processing, for example, in FIG. 15, blocks E1, E2, and E3 shown by solid lines are unconnected crushed blocks having processing start point candidates, and regions E4 and E5 shown by broken lines are Assuming that the block P is an unconnected smashing block having no processing start point candidate, and the point P is an edit reference point (initial connection point of interest), the smashing block is the route L1 → L2 → L3 in the order of step S545. Connect E1, E4, E2.

At the stage of connecting to the squeeze block E2, since there is only one smashing block E3 that has a processing start point candidate and is not connected, the processing of step S543 does not consider the distance and The block E5 is connected to the block E2 by L4. Then, finally, by the process of step S544, the unconnected smashing block E3 having the processing start point candidate is connected by the route L5.

As described above, when the unconnected smashing blocks having the machining start point candidates, that is, the smashing blocks existing in the area where the tool can descend, are finally connected, the actual machining is the same as that at the time of connection, as described above. Are executed in the reverse order (specifically, CL data is output to the NC machine tool 7 in the reverse order via the input / output control device 4). The tool can be lowered to the field.

As described above, the reason why the connecting process is carried out in the reverse order of the actual machining is that the route from the edit reference point to the tool descent possible area can be easily searched. , CL data concatenation processing can be optimized.

The processing time (T) from the connection point of interest to the end of the crushed block is T = <processing time from the connection point of interest to the processing end point of the crushed block (T1)>
+ <Processing time of crushed block (T2)> + <Processing time from processing start point of crushed block to processing start point candidate of field to which the crushed block belongs (T3)
>, And when there is no processing start point candidate of the field corresponding to the processing start point of the crushed block, the processing time (T3) is the processing time from the target connection point to the end of the crushed block (T ) Is not included in the calculation. In this case, the next connection point of interest becomes the processing start point of the crushed block.

In the calculation of the processing time, the next connection target is searched in the reverse order of the actual processing order as described above. Therefore, in the calculation of the processing time (T1), the connection point of interest is the -In the case of a processing start point candidate of the field, the tool can be lowered, so the tool is calculated as moving above the sky. On the other hand, if the connection point of interest is not a machining start point candidate for the field, the tool is assumed to move for cutting and the machining time (T
Calculate 1).

FIG. 16 is a search process of a smashing block that can be processed in the shortest time from the connection point of interest in step S545 of FIG. 14, <processing time from the connection point of interest to the processing end point of the smashing block (T1). 4 is a flow chart showing in detail the process of obtaining CL data for connecting two points in calculating>.

In the process for obtaining the CL data for the connection between these two points, first, the descent possible flag in the storage device 3 is referenced, and the target connection point, which is the end point of the CL data for the connection, exists in the descent possible area. It is determined whether or not (step S54)
51). As a result, if it is within the descent possible area, CL data for cutting and moving between two points is created, and the processing time (T cutting) is calculated (step S5452). Then, CL data for moving between two points in the sky is created, and the machining time (above T) is calculated (step S5453).

Next, regarding the above-mentioned T cutting and above T, T
It is determined whether the cutting is larger than the sky above T (step S5454). As a result, if the T cutting is larger than the T sky and the machining time (the T sky) for moving between two points is shorter, the CL data for the shorter machining time is set as the CL data for joining. (Step S54
55) and returns to the flow of FIG. On the other hand, when T cutting is smaller than T sky or when T cutting and T sky are equal, CL data for cutting movement is set as CL data for connection (step S5456), and the process returns to the flow of FIG. In this way, the CL data for cutting movement when T cutting and T sky are equal is set as the CL data for the connection. When the tool moves on the CL for the connection, the tool processes the uncut portion. There is a possibility that there is no need to reprocess the uncut part again,
This is because the whole processing time is shortened.

If it is determined in step S5451 that the target connection point, which is the end point of the CL data of the joint, does not exist in the descent possible area, it is in a state where it cannot move in the sky, so the cutting movement between the two points is performed. CL data to be created is set and set as the CL data for connection (step S545).
7) and returns to the flow of FIG.

After turning to FIG. 14 in this way, referring to the data such as the smashing block in the storage device 3, the smashing block to be connected next determined in step S545 is the processing field of interest. It is determined whether or not the processing start point candidate is included (step S546). As a result, if the crushed block includes the processing start point candidate of the target processing field, the remaining number of the crushed blocks having the processing start point candidate of the target field is decremented by "1" and stored in the storage device 3. The data is stored (step S547) and the process returns to the flow of FIG.

After the healing of FIG. 6 in this way, the CL data for processing the crushed block created as described above as the next connection target is stored in the storage device 3.
(Step S55). Then, the last point of the CL data is set as the next connection point of interest (step S56), the process returns to step S53, and the presence or absence of a crushed block whose processing order is undetermined is determined again. This step S
When it is determined in 53 that there is no crushing block whose processing order is undecided, it means that the crushing CL data concatenation processing is completed, as is clear from the above description. Therefore, the general flow of FIG. Return to.

After returning to the general flow of FIG. 2 in this way, the crushing CL data for processing the crushing block is referred to from the storage device 3, and the processing end point of the previous field is determined. , Or create CL data of the joint from the initial position of the tool to the machining start point of the field of interest, and machine the crushed block obtained by calculation of the machining order of the crushed block for the CL data of the joint. CL data is stored in the storage device 3 as CL data up to the edit reference point of the field of interest (step S6), and the process proceeds to step S8.

If it is determined in step S4 that there is no crushed CL data in the field of interest, the storage device 3
CL data of the front field is created by referring to CL data in the above, and CL data of the connection from the initial position of the tool to the machining start point of the field of interest is created, and the field of interest is
The CL data up to the edit reference point of the field is stored in the storage device 3 (step S7), and the process proceeds to step S8.

In step S8, the contour CL data stored in the storage device 3 is referred to, and it is determined whether or not the target field has contour CL data. as a result,
If there is no contour CL data in the field of interest, the process returns to step S2, and it is determined whether or not the CL data concatenation processing has been completed for all layers from the uppermost layer field to the lowermost layer field.

On the other hand, if there is CL data of the contour in the field of interest, the CL data of the contour stored in the storage device 3 is stored.
Data is created, the CL data of the connection from the editing reference point to the CL data of the contour is created, linked to the CL data of the contour, and stored in the storage device 3 (step S9), and the process returns to step S2. The same process as above is performed.

In the case of connecting the contour CL data, in the present embodiment, (1) the contour CL machining start point that can be moved from the current position in the shortest time is moved, (2) where each of the open machining is performed. As a general rule, CL data is traced as one C
L data is concatenated.

FIG. 17 is a flowchart showing in detail the process of connecting the CL data of the contour. First, the edit reference point is set to the target connection point (step S91). Then, with reference to the CL data of the contour in the storage device 3, it is determined whether or not there is CL data of the contour of the open processing in the field of interest (step S92). As a result, if there is CL data of the contour of the open processing, the C of the open processing is obtained.
The L data are concatenated into one group and stored in the storage device 3 (step S93), and the process proceeds to step S94. The connection in this case is the CL of the open processing closest to the editing reference point.
CL data for open processing is linked in the order registered from the data. Then, the end point of the last connected CL data of the open processing is set as the target connection point.

On the other hand, if there is no CL data of the contour of the open processing, the process of step S93 is skipped and the process proceeds to step S94. In step S94, the presence or absence of CL data of contours that have not been connected is determined by referring to CL data of contours in the storage device 3. As a result, if there is unprocessed CL data of the contour, the CL data of the contour closest to the target connection point is searched and connected, and the connected C
The L data and the like are stored in the storage device 3, the end point of the CL data of the connected contour is set as the target connection point (step S95), the process returns to step S94, and the presence or absence of unprocessed contour CL data is checked. Determine. If it is determined in this step S94 that there is no unprocessed contour CL data, it means that the concatenation processing of the contour CL data in the target field has been completed, and therefore the process returns to the general flow of FIG. To do.

The method for moving the tool between two points from the connection point of interest to the machining start point of the CL data of the contour is as follows: in the case of the first machining field and the second and subsequent machining of the bottom surface,
Since there is a possibility that the shape remains unprocessed on the tool movement route between the points, the shorter movement time of the cutting movement or the sky movement is selected in order to shorten the processing time. In addition, except for machining the bottom surface after the second time, the method of moving the tool between two points is to shorten the machining time because there is no unmachined shape left on the tool movement route between the two points. In order to achieve this, either the air cut movement or the air movement, whichever has the shorter travel time, is used.

FIG. 18 is a flow chart for explaining in detail the tool movement between two points when the CL data of the contour closest to the target connection point is connected in step S95 of FIG.

In this case, first, with reference to the CL data stored in the storage device 3, there is a possibility that the shape remains unmachined on the movement route of the tool between two points. It is determined whether or not there is (step S951).

As a result, if there is a possibility that the shape remains unmachined, the method of moving the tool between the two points is to move the cutting time or the moving time in the sky in order to shorten the moving time. Set the shorter one (step S952),
It returns to the flow of FIG.

On the other hand, if there is no possibility that the shape remains unmachined, the method for moving the tool between the two points is to move the air cut movement or the movement time in the sky to shorten the movement time. Set the shorter one (step S95
3) and returns to the flow of FIG.

[0096]

As described in detail above, the C of the present invention
According to the L data automatic concatenation device, C is automatically and optimally formed.
L data can be concatenated. Therefore, even if the CL data for processing into a complicated shape is connected, it is not necessary to spend enormous time and labor for connecting the CL data as in the conventional case, and the processing time is lengthened. It is also possible to create unnecessary CL data.
In addition, even beginners can easily and concatenate CL data in a short time so as to shorten the processing time.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a CL data automatic connection device according to an embodiment of the present invention.

FIG. 2 is a general flowchart showing an outline of an automatic connection operation of CL data.

FIG. 3 is an explanatory diagram of a crushing block and a hatch.

FIG. 4 is a flowchart showing a process of setting an edit reference point.

FIG. 5 is a diagram for explaining how to determine a processing start point candidate for a field of interest.

FIG. 6 is a flow chart showing a smashing block processing order determination process.
It is a chart.

FIG. 7 is a diagram showing an image of concatenated CL data.

FIG. 8 is a diagram for explaining a tool movement mode between two points.

FIG. 9 is a flowchart showing a process of determining processing start point candidates for a field of interest.

FIG. 10 is a flowchart continued from FIG. 9;

FIG. 11 is a diagram for explaining CL data concatenation processing in a crushed block.

FIG. 12 is a flowchart showing CL data concatenation processing in a crush block.

FIG. 13 is a diagram showing a display example when a processing start point candidate for a field of interest cannot be automatically set.

FIG. 14 is a flowchart showing a search process for a next block to be connected.

FIG. 15 is a diagram illustrating an example of a search process of a block to be connected next.

FIG. 16 is a flowchart showing a tool moving process between two points.

FIG. 17 is a flowchart showing a CL data concatenation process of contours.

FIG. 18 is a flowchart showing a tool movement process between two points in consideration of air cut movement.

FIG. 19 is a diagram showing an example in which the tool avoids interference and cannot perform cutting movement.

[Explanation of symbols]

1: Central processing unit 2: Input device display device 3: Storage device 4: Input / output control device 5: Display device 6: External storage medium 7: NC machine tool f1: Crushing block f2: Hatch (crushing tool path) f4: Field (machining surface) f5: Tool path f6: Machining start point of target field f7: Candidate machining start point of target field f8: CL of joint between pairs f9: Machining start point of hatch element f10: Crushing machining end point f11 : Mark f12: field of interest f13: crush block E1, E2, E3: crush block having processing start point candidate of field of interest E4, E5: crush block having no processing start point candidate of field of interest

Claims (16)

[Claims] 1. Regarding crushing tool path data consisting of a plurality of lines belonging to one machining surface, crushing tool path connecting means for connecting the crushing tool path data for the plurality of lines, and a plurality of crushing tool path data belonging to one machining surface. Contour tool path data for the contour tool path data, contour tool path connection means for connecting the contour tool path data, connection tool path data connected by the crushing tool path connection means, and connection by the contour tool path connection means An automatic tool path data linking device, comprising: linked tool path data, or different tool path linking means for linking contour tool path data that exists independently. 2. The automatic tool path data linking device according to claim 1, further comprising a high and low surface tool path linking means for linking tool path data relating to links belonging to working surfaces having different working heights. Automatic tool path data connection device. 3. The automatic tool path data linking device according to claim 1 or 2, when there are a plurality of open-state contour tool path data belonging to one machining surface, two open contours are provided. Among all the combinations of tool path data for use, the combination in which the distance between the end point of the tool path data for contour in one open state and the start point of the tool path data for contour in the other open state is the longest Automatic path connection of tool path data, characterized in that it has a first setting means for setting the starting point of the other contoured tool path data in the open state as a reference point for connecting the tool path data on the machining surface. apparatus. 4. The tool path data automatic connecting device according to claim 1, claim 2, or claim 3, when a plurality of closed contour tool path data belonging to one machining surface are present, Automatic tool path data, characterized by having a second setting means for setting a predetermined point of the contoured tool path data in the closed state on the outermost peripheral side as a reference point for connecting the tool path data on the machining surface. Coupling device. 5. The tool path data automatic linking device according to claim 1, claim 2, claim 3, or claim 4 is arbitrary when only the tool path data for crushing belongs to one machining surface. Of the four corner points of the line group that make up the tool path data for crushing, the point that has the shortest distance to the tool, allows the tool to move linearly, and allows cutting movement An automatic tool path data linking device having a third setting means for setting as a reference point for connection. 6. The tool path data automatic connection device according to claim 1 or 2, wherein the first setting means and the second setting means are provided.
And the third setting means, both of which are the first
Setting means> second setting means> third setting means in the order of priority so as to set a reference point for connecting the tool path data. apparatus. 7. The crushing tool path connecting means, the contour tool path connecting means, and the dissimilar tool path connecting means perform connection while sequentially setting connection points indicating connection positions with tool path data to be connected next. Claim 1, characterized in that
The tool path data automatic connection device according to claim 2, claim 3, claim 4, claim 5, or claim 6. 8. The crushing tool path connecting means, the contour tool path connecting means, and the dissimilar tool path connecting means respectively move the crushing tool path data, contour tool path data, which can be moved from a set connection point in the shortest time. The tool path according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, or claim 7, wherein the tool path data relating to the connection is sequentially connected. Automatic data connection device. 9. The crushing tool path connecting means performs the connection in a path that avoids the tool interference when the tool interference occurs when the crushing tool path connecting means is connected by a straight path.
Claim 2, Claim 3, Claim 4, Claim 5, Claim 6,
The tool path data automatic connection device according to claim 7 or 8. 10. The contour tool path connecting means, when there are a plurality of open contour tool path data, collectively connects the open contour tool path data together. The automatic tool path data coupling device according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7, claim 8, or claim 9. 11. The contour tool path connecting means has a tool moving time of a cutting path in which the tool moves in a cutting state and a non-cutting path in which the tool moves in a non-cutting state when the connection destination can descend the tool. The shorter path is selected to connect the tool path data of the contours, claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7, claim 7. The tool path data automatic connection device according to claim 8, claim 9, or claim 10. 12. The heterogeneous tool path connecting means selects a path having a shorter tool moving time from a cutting path along which the tool moves in a cutting state and a non-cutting path along which the tool moves in a non-cutting state, The connection tool path data connected by the crushing tool path connection means, the connection tool path data connected by the contour tool path connection means, or the contour tool path data existing independently are connected. Claim 1, claim 2, claim 3, claim 4, claim 5,
Claim 6, Claim 7, Claim 8, Claim 9, Claim 1
0 or the tool path data automatic connection device according to claim 11. 13. The crushing tool path connecting means performs the connecting processing prior to the contour tool path connecting means, claim 1, claim 2, claim 3, claim 4,
Claim 5, Claim 6, Claim 7, Claim 8, Claim 9,
The tool path data automatic connection device according to claim 10, claim 11, or claim 12. 14. If a distance between the plurality of crushing blocks and the tool is the shortest among the four corner points of the line group constituting the crushing tool path data, and there is a point where cutting movement is permitted, this A fourth setting means for setting a point as a processing start point candidate on the processing surface and the crushing tool path data of each crushing block from a predetermined reference point are sequentially connected by the fourth setting means. The crushed block connecting means for finally connecting the crushed blocks having the set machining start point candidates and the connected tool path data connected by the crushed block connecting means are output in reverse order as tool path data at the time of actual machining. A tool path data automatic connection device comprising a first output means. 15. The tool path data automatic linking device according to claim 14, wherein there is no crushed block for which the machining start point candidate is set by the fourth setting means,
An automatic tool path data connection device having a second output means for outputting that effect. 16. The high and low surface tool path connecting means sequentially connects tool path data belonging to a machining surface located at the shortest distance from the set connection point, according to claim 2 and claim 3. , Claim 4, claim 5, claim 6, claim 7, claim 8, claim 9, claim 10, claim 1
The tool path data automatic connection device according to claim 1, claim 12, claim 13, claim 14, or claim 15.