JPS6237703A - Numerical controller - Google Patents

Abstract

PURPOSE:To prevent previously the interruption of a cutting process due to an alarm for litetime of a tool by carrying out previously the simultaneously check of the tool control prior to execution of a working program and performing the working according to the result of said check. CONSTITUTION:A tool data setting means 1 sets the tool lifetime, the tool using time, the tool group control data, the number of objects to be worked, etc. While a tool control simulation check means 2 obtains the number of works that can be cut by the tool set presently, the cutting end time and the ideal lifetime of the tool to be replaced. A result display means 3 displays the result of said simulation. Based on this result, an operator supplies the tool via a tool supply means 7 when it is decided that an alarm is produced for the tool lifetime in case the cutting process is started directly. Then a cutting means 4 performs again the processes including the setting of tool data through the display of results. The cutting process is started after the ideal state of the tool is confirmed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a numerical control device having a tool management simulation check function.

[Conventional technology]

FIG. 4 is a block connection diagram of a conventional numerical control device having a tool life management function. In the figure, 1 is a tool data setting means, 4 is a cutting means, 5 is an alarm means, and 6 is a cutting end means.

Next, the operation of such a numerical control device will be explained.

First, in the tool data setting means 1, tool life time and usage time of each tool, tool group management data for grouping tools of the same type, and workpieces to be continuously cut are stored. Set the number etc. The cutting means 4 starts automatic cutting operation following the completion of setting the tool data. This cutting is performed automatically according to the flowchart shown in FIG. 5.

That is, first of all, it is determined whether or not the machine tool is cutting (Step 2), and if it is determined that cutting is in progress, the usage time of the tool being used is counted up by a counter (Step 2). Step ■), determines whether the usage time has exceeded the life time set in the tool data setting means 1 (step ■), if it has exceeded the tool change command (step ■), if not, step ■Repeat all of the following actions. Next, when a tool exchange command is issued, it is determined whether or not there is a usable tool from the tool group (step (2)), and if there is a tool, the tool is changed (step (2)). On the other hand, if there is no tool to be replaced, the alarm means 5 generates an alarm (step 2). Further, when such an alarm occurs, the operator sets a usable tool on the turret, enters the tool data setting means and the cutting means, and performs the cutting operation again. Incidentally, if the number of machining pieces set by the tool data setting means 1 is executed without generating the above-mentioned alarm, cutting is completed.

[Problem that the invention seeks to solve]

Since the tool life management function of conventional numerical control devices is as described above, the above-mentioned alarm to warn about tool life may occur while cutting a workpiece, and machining may be left in a state of interruption for a long time. Ta. Therefore, even if the tool is changed again and cutting is restarted, there are problems such as deformation of the workpiece, resulting in a decrease in precision, and a large time loss until cutting is restarted.

This invention was made to solve the above problems, and it is possible to know the life time of each group of set tools, and to determine the most suitable tool life for cutting before starting cutting. The purpose of the present invention is to provide a numerical control device that can prevent cutting interruption due to a tool life alarm during cutting by setting all the tools.

[Means for solving problems]

The numerical control device according to the present invention performs a tool management simulation check using a tool management simulation check means in advance before executing a machining program such as cutting, and uses this check to determine the optimum tool condition for machining. The structure is such that it issues tool replacement instructions.

[Effect]

The tool conversion simulation check means in this invention determines the required number of machining times, machining completion time, etc. from the machining cycle time, tool or tool usage time, etc., and notifies the operator by displaying the determined results. Data and instructions to bring the tool into an ideal state where no tool life alarm occurs during the machining process are given to the operator, and the operator is made to replenish the appropriate tools. After such work, a machining program such as cutting can be executed, and problems such as machining interruptions do not occur.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, reference numeral 1 denotes tool data setting means, which performs the same processing as in the prior art. 2 is a tool management simulation check means, in which the number of workpieces that can be cut with the currently set tool, the cutting completion time, and the ideal life time of the tool to be replaced are determined. 6 is a simulation result display means. Reference numeral 7 denotes a tool replenishment means by which the operator sets an appropriate tool on the turret when it is determined based on the simulation result that a tool life alarm will occur if the cutting process continues as shown below. 4 is a cutting means that performs the result display process again from tool data setting 1 and starts cutting after confirming that the ideal tool condition is present, and 6 is a cutting end means that transitions to when no alarm occurs during cutting. .

Next, the operation will be explained. This embodiment differs from the conventional example shown in FIG. 4 in that tool management simulation check means 2, result display means 6, and tool replenishment means 7
These means 2 are provided below.
, 3.7 will be mainly explained while referring to the time chart in FIG. 2.

First, the cycle time from the start of the Canadian program to the end of one cycle is determined (step 0).

Next, we measure the tools used in the Kani program and their usage time, and calculate the time required to process the required number of pieces, the time to finish cutting, and the number of workpieces that can be cut when starting cutting with the currently set tool. (Step O). Next, step 0 determines whether it is possible to process the required number of pieces.
), terminate the process if possible. On the other hand, if it is not possible to machine the required number of pieces, the operator replenishes the turret with tools according to the tool replenishment means 7 in order to obtain an ideal tool condition that will not generate a tool life alarm during cutting. , create ideal replacement tool life data.

Figure 3 (al, (bl) is an example of displaying the results of the data obtained in the tool management simulation check.
The diagram ``fat'' is a display when it is determined that cutting can be started using the currently set tool, and READY means that cutting can be started. Next, the number of required cuttings set by the parameters, the time required for cutting, and the cutting end time when cutting is performed continuously are shown.

Figure 3 (bl is the display when it is evaluated that the tool needs to be replaced as a result of the simulation check, and shows the number of pieces that can no longer be machined due to cutting being interrupted due to the occurrence of the tool life alarm, the number of pieces that can be machined before the alarm occurs, and the location) The graph in the center shows the alarm time and alarm occurrence time.
It shows the total life time remaining for each current tool group and the total usage time to cut the required number of workpieces.

The arrow on the left side of the graph indicates the group with insufficient tool life.
The irregular time is shown on the right side of the graph. The tool exchange data that the operator refers to when replenishing tools according to the tool replenishment means 7 is displayed at the very end. Based on these, the operator sets the tool in the position indicated by the tool number and the tool with a longer life time than the ideal life time shown in Figure 3 (al, (bl) in the table. will be replenished.

In addition, in the above embodiment, the Nominos simulation check was shown for the tool usage time, but the number of times the tool was used can also be checked, thereby making it possible to perform a simulation check that combines the usage time and the number of times the tool is used. .

〔Effect of the invention〕

As described above, according to the present invention, the configuration is such that, before starting machining operations such as cutting, it is possible to perform a simulation check of tool management to ensure optimal tool life without stopping continuous machining. This has the effect of eliminating problems such as an alarm occurring during a machining operation and the interruption of the machining operation, or the occurrence of deformation or loss of machining time due to the work being left for a long time due to the suspension of the operation.

[Brief explanation of the drawing]

Fig. 1 is a block connection diagram showing the numerical control device according to the present invention, and Fig. 2 also shows the operation of tool management simulation check. - f year), Figure 3 is a display example of data obtained by tool management simulation, Figure 4 is a block connection diagram of a conventional numerical control device, and Figure 5 is a flowchart of tool life management in the same numerical control. . 2 is a tool management simulation check means, 6 is a result display means, and 7 is a tool replenishment means. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Patent applicant Mitsubishi Electric Corporation (2 others) Figure 3 (a) *3 Figure (b) Procedural amendment (voluntary) Indication of LFIY case Mochi 1 (iri 1986-1768
No. 99 No. 2, Name of the invention Numerical control device 3, Representative Moriya Shiki of the person making the amendment 5, Subject of the amendment 6, Contents of the amendment (11 Description "Create" on page 7, line 3 of the specification) (2) In the first line of the 8th page of the specification, the phrase "indicates the unspecified time." is amended to "indicates the insufficient time." (3) Amend the attached Figure 2 of the circular. 7゜One or more documents containing the revised Figure 2 of the catalog of attached documents.

Claims (1)

[Claims] A numerical control device with a tool life management function is provided with a tool management simulation check means for checking the tool life management through simulation, and the tool life management simulation check means is installed before executing the machining program. By performing a section check, you can check the life time of each tool group.
A numerical control device characterized by informing an operator of cutting end time, tool exchange instructions, etc.