JP3467811B2 - NC data creation method and NC processing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an NC data creating method and an NC processing method for processing a plurality of works mounted on a pallet by an NC processing machine.

[0002]

2. Description of the Related Art Conventionally, a plurality of works have been mounted on a single pallet and processed by an NC processing machine. In this case, NC processing is disclosed in JP-A-4-223.
As shown in Japanese Patent No. 841 NC,
After creating the machining data, use the custom macro function and work coordinate conversion function of the NC processing machine to perform automatic measurement, rewrite the work origin, move the origin, and then NC data for the corresponding work. Are being called and processing is in progress.

[0003]

In this case, since NC data for machining a single workpiece is simply called in accordance with the machining order, that is, machining of a plurality of workpieces is completed by machining one workpiece. In order to move to the machining for the next work later, for example, the tools used for machining the first work are A, B, C, D and the tools used for machining the second work are A, B, C,
Even if it is D, after machining the first work while exchanging the tools A, B, C, D, A, B, again.
The second workpiece is machined while the C and D tools are exchanged, and the machining time is inevitably lengthened due to the time required for the tool exchange.

Shown in Japanese Patent Laid-Open No. 58-178405
As described above, each tool in the order in which the work is used
The presence or absence of a common tool is judged to add to multiple workpieces.
When determining the work order by automatic editing, unnecessary tool changes
The processing time can be shortened by eliminating the
For the tool used for machining one work and for machining the second work
If there is a tool that is common to the tools used, the first work piece
All tools for use with the second work can be exchanged
There is no need to set it in a proper state.

However, what is shown here is for each work.
The machining order in is not considered at all,
Processing with the following other tools that have been processed by
It cannot be applied if the above assumption is applied.

Further, since a plurality of works are arbitrarily arranged on the pallet, if the interval between the works W1 and W2 adjacent to each other is narrow, as shown in FIG. Although it may interfere with W2, this interference cannot be dealt with in the conventional case.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an NC data creating method and an NC machining method capable of reducing the time required for tool replacement. For other purposes, NC that can avoid interference between tool and work
A data creating method and an NC data processing method are provided.

[0008]

SUMMARY OF THE INVENTION The NC data creating method according to the present invention, however, is an N data for machining a plurality of works mounted on a pallet by an NC machining machine.
C data creation method, N for machining for each work piece
Use of the work when referring to the C data and the tool information used in these single NC data and automatically deciding the machining order for a plurality of works from the selection result of the same tool that can be used for a plurality of works In order to determine the machining order by repeatedly determining the presence or absence of a tool common to other workpieces for each sequential tool, in making the above determination, ordering is performed in descending order of the number of tools that use multiple workpieces. , The first tool to be used for the work having the largest number of tools is set as the tool to be used first, and the machining by the tool is registered as the machining to be performed first, when performing corresponding with the tool used for machining is then registered as then performs processing the processing, then, the pair number of tools most often work to use the If the next tool to be used is the same as the tool to be used for subsequent machining of another work, the feature is that the machining for each work performed using the tool is registered as the next machining. is there.

At this time , the tool life is determined by comparing the cutting distance of the tool to be used with the preliminarily registered limit cutting distance information of the tool, or for each work based on the attachment data of the work on the pallet. The interference check between the tool and the work may be performed together from the interference check area and the trajectory of the tool.

In the NC data processing method according to the present invention, the NC data created by the NC data creating method is converted into NC data for the NC processing machine by referring to machine data specific to the NC processing machine to be used. However, the NC processing machine is characterized by processing a plurality of works on the pallet by using the NC data.

[0011]

According to the present invention, a tool used for each of a plurality of works is checked, and the machining order is replaced not by each work but by a tool-based one. In addition, when performing an interference check, it is possible to check the interference between the tool and the workpiece in advance, and when determining the tool life,
Lifetime issues when using a single tool across multiple workpieces can be cleared.

[0012]

EXAMPLES The present invention will be described in detail below with reference to examples.
In the present invention, single NC data created for each of a plurality of works such as molding dies that are mounted on a single pallet, and tool information included in the single NC data (hereinafter referred to as single tool data). . (Example of data structure shown in FIG. 3 ) is automatically edited to create NC data for all workpieces assuming that the machining order is determined in consideration of the tool to be used. The determination of the processing order for is performed as follows.

That is, a single NC created for each work
After reading the data and the individual tool data for all the workpieces to be machined, as shown in FIG. 1 , the first workpiece, the second workpiece, and the third workpiece are arranged in descending order of the number of tools to be used.
Work pieces are ordered, and the first tool used in the first work is compared with the first tool used in the second and third work as the reference tool. If they match, these are placed in the machining order. After registering and registering only the standard tool in the machining order if they do not match, first set the standard tool
Repeat the process by moving to the next tool of the work, and if all the tools for the first work are registered in the machining order, move the reference to the tools that are not registered in the machining order of the second work and repeat the same work. In return, the machining order is determined and the individual NC data is divided and rearranged in the determined machining order . At this time, the order of the reference tool is as shown in FIG. 2 , and after the tools A of the first work and the second work are registered in the processing order, the processing order is set with the tool E of the third work as the reference tool. You may decide.

On the other hand, with respect to a plurality of works mounted on the pallet, the mounting positions and angles thereof are measured and the results shown in FIG.
The mounting data as shown in (1) is created, and the interference check between the tool and the work is performed based on this mounting data. That is, as shown in FIG. 4 , interference check areas a1, a2, and a3 are set for the works W1, W2, and W3, respectively, and areas A1, A2, which are offset by the radius of the tool T, are set therein. A3 is set and this area is used for the tool T
The interference with the work is detected for each tool depending on whether or not the trajectory of is crossed.

Further, as shown in FIG. 6 (a) , the cutting distance is calculated for each tool to be used, and the limit cutting distance (FIG. 6 (b)) set for each previously registered tool type is calculated . comparison, if the cutting distance exceeds the limit cutting distance is 6
As shown in (c) , the NC data on the machining using the tool is divided so that the cutting distance does not exceed the limit cutting distance. FIG. 6D is a data structure of tool life data in which the limit cutting distance is registered.

The NC data created in this way is
As shown in FIG. 8 , a machine start command, a machine stop command, a tool change command, a tool number, a tool diameter correction number, a tool length correction number, a tool change limit number, and the like, which are peculiar to the NC processing machine used for processing, are registered. By referring to the machine data (Fig. 7 (c)) and making additional corrections, the N matched to the NC processing machine used
Create C data. When the machining order is as shown in FIG. 7A, the NC data as shown in FIG. 7B is created in a state of being matched with the NC machining machine used. Then, by operating the NC processing machine based on this NC data, processing is performed on a plurality of works on a single pallet.

FIG . 9 is a flow chart of all the steps relating to the above NC creation. Whether or not to execute the interference check between the tool and the work and to determine the life of the tool can be selected by selecting the execution content in the NC data creation instructing section.

[0018]

As described above, in the present invention, the tools used for a plurality of works are checked and the machining order is replaced not by the works but by the tool, so that the time required for the tool replacement is changed. It is possible to reduce the number of tools and eliminate the need to set the tool again .
Since the order of use is also taken into account, certain tools
It is a prerequisite for other processing with other tools that the work is done
Even if it is set to 0, there will be no problem. Also, N
When inputting the C data, it is only necessary to consider the single work, and it is not necessary to consider the connection with other works, so that the time required for the input can be reduced.

Further, when performing the interference check, it is possible to check the interference between the tool and the work in advance, so that the work is not damaged by the interference, and when the tool life is determined, a plurality of tools are used. Even when a single tool is used over the workpiece, there is no possibility of using a tool whose life has expired. Then, an NC processing machine that performs processing using NC data created from the NC data created in this way and machine-specific data is
Extremely efficient machining is performed on multiple workpieces on a pallet.

[Brief description of drawings]

FIG. 1 is a flowchart showing an algorithm for determining a machining order according to an embodiment.

FIG. 2 is an explanatory diagram of the same as above.

FIG. 3 is an explanatory diagram of a data structure of single tool data.

FIG. 4 is an explanatory diagram of interference check.

[FIG. 5] (a) is an explanation of the data structure of work attachment data.
Figure, (b) is a plan view of the work.

6 (a), (b), (c) and (d) are explanatory views for tool life determination.
is there.

FIG. 7 (a) is an explanatory view showing an example of the processing sequence, and FIG. 7 (b) shows this.
NC processing that is created and used according to the processing sequence
Explanatory drawing of NC data corrected according to machine, (c) Machine
It is explanatory drawing of the data structure of data.

FIG. 8 shows code conversion according to the NC processing machine used .
2 is a flow chart.

FIG. 9 is a flowchart showing all steps of NC data creation .
Is.

FIG. 10 shows interference between a tool and a workpiece in a conventional example .
FIG.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-178405 (JP, A) JP-A-61-251908 (JP, A) JP-A-3-60954 (JP, A) JP-A-4- 84306 (JP, A) JP 5-204434 (JP, A) JP 62-19357 (JP, A) JP 4-105848 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B23Q 15/00-15/28 G05B 19/18-19/46

Claims (4)

(57) [Claims] 1. A method for creating NC data for machining a plurality of workpieces mounted on a pallet by an NC machining machine, wherein machining NC data for each workpiece and tools used for these NC data pieces. Refer to the information and determine the machining order for multiple workpieces by automatic editing from the selection result of the same tool that can be used for multiple workpieces. A tool common to other workpieces for each tool in the workpiece use order. In addition to determining the machining order by repeatedly determining the presence or absence of a workpiece, when performing the above determination, the workpieces with the largest number of tools are used in order of the number of tools that use multiple workpieces. Register the first tool to be used as the first tool to be used, and register the machining of the workpiece with the tool as the first machining. If corresponding with the tool used for machining performed in the following other work register as performed next processing the processing, then the tool number of tools to be used in the is then used for the most frequently work other The NC data creating method is characterized in that, when the tool matches the tool used for the next machining of the workpiece, the machining for each workpiece using the tool is registered as the machining to be performed next. 2. The NC according to claim 1, further comprising: determining the tool life by collating the cutting distance of the tool to be used with the preliminarily registered limit cutting distance information of the tool.
Data creation method. 3. The NC data creation according to claim 1, wherein the interference check between the tool and the work is also performed from the interference check area for each work and the trajectory of the tool based on the mounting data of the work on the pallet. Method. 4. The NC according to claim 1, 2 or 3.
Use the NC data created by the data creation method to use N
An NC machining method characterized by converting machine data specific to a C machining machine into NC data for the NC machining machine, and machining a plurality of works on a pallet by the NC machining machine using the NC data. .