JPH03196943A - Machining control method in numerically controlled machine tool - Google Patents

Abstract

PURPOSE:To enable it to determine the sequence of multiple machine processes in operation so suitably by installing such a means that the operation sequence of each machining process is made so as to be determined on the basis of a precedence index, at the time of making these plural numbers of working operations so as to be machined by the specified sequence. CONSTITUTION:In a numerically controlled machine tool 1, a precedence index M showing the degree of precedence among plural working operations in the past machining is stored in a process sequence data base 11, producing a first machining programs PRO1 consisting of these plural working operations. This machining program PRO1 inputted and produced is stored in a machining program memory 7. When an operator inputs a change command of the sequence of operations out of an input unit 5a in advance of the machining. A main control part 2 instructs a change of the operation sequence of the program PRO1 stored in the memory 7 to a process arrangement control part 9. If so, the control part 9 reads the program PRO1 out of the memory 7 and simultaneously reads the index M out of the data base as well, changing the operation sequence, and it performs the machining on the basis of the changed program.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a machining control method in a numerically controlled machine tool that performs machining related to a plurality of machining steps in a predetermined process order.

(b), Conventional technology Conventionally, in numerically controlled machine tools, one operator determines the process order for multiple machining steps (
For example, end face cutting process, outer circumference turning process, inner circumference turning process,
A machining program consisting of a groove machining process, etc.) is created, and during machining, each machining process is performed based on the machining program created by one operator, and in the process order determined by the operator.

(C) 0 Problems to be Solved by the Invention However, with this, when creating a machining program, the operator must determine the order of multiple machining steps based on his or her own experience and knowledge. Therefore, only workers with specialized knowledge and experience in each machining process can create a machining program, and even when creating a machining program, it takes a considerable amount of time to determine the process order. There was a problem.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a machining control method for a numerically controlled machine tool that can suitably determine the order of a plurality of machining processes.

(d) Means for Solving Zero Problems The present invention is based on a machining program (PRO), in which the process order (ps) specified by the machining program (PRO) is
In a numerically controlled machine tool (1) that performs machining related to multiple machining processes (MP), a priority index (M) indicating the priority among multiple machining processes (MP) in past machining.
is stored in the process permutation database (11), and a first machining program (PRol) consisting of a plurality of machining processes (MP) is stored.
), the priority index (M) regarding each machining process (MP) in the first machining program (PRO□) is read out from the process permutation database (11), and the priority index (M) is M), the process order (PS) of each machining process (MP) in the first machining program (PROl) is changed, and the second machining program (PROl) is changed.
PRO□, PRO3) is generated, and the second machining program (PRO2゜PRO
3) is configured to perform processing based on the above.

Further, the present invention provides a numerically controlled machine tool (1
), a priority index (MLJ) indicating the priority of the first machining process (MPL) over the second machining process (Mpr)
), and based on the priority index (Mo), the first machining process (MP□) and the second machining process (MPJ
), and determine the process order (ps) of the process (ps).
PS) is output to the output device (6a), and when there is no process change command from the process order changing means (5a).

Processing is performed based on the determined process sequence (PS), and when there is a process change command from the process sequence changing means (5a), the determined process sequence (PS) is changed based on the command. and the changed process sequence (ps)
It is configured to perform processing based on.

Further, the present invention provides a numerically controlled machine tool (1
), a priority index (M I
J), and set the priority finger 1till (
Determining the process order (ps) of the first machining process (MPt) and the second machining process (MPJ) based on the Mt, and outputting the process sequence (PS) to the output device (6a);
When there is no process change command from the process order changing means (5a), processing is performed based on the determined process order (ps), and when there is a process change command from the process order changing means (5a). , the determined process order (ps) is changed based on the instruction, and processing is performed based on the changed process order (ps), and in the processing, the first processing step (MP* ) is given priority to the second machining process (MPJ), the priority index (M I J ) is updated so that the priority becomes high, and in the process, the second machining process When the process (MPJ) is prioritized over the first processing process (MPl), the priority index (MtJ) is updated so that the priority becomes lower.

The numbers in parentheses are for convenience, indicating corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings.
The same applies to the column ``, action''.

(e) 0 effect With the above configuration, each processing step (MP
) is determined based on the priority index (M).

(f), Example Hereinafter, one embodiment of the present invention will be explained in detail based on the drawings.

FIG. 1 is a control block diagram showing an embodiment of a numerically controlled machine tool to which a processing control method according to the present invention is applied.

FIG. 2 is a schematic diagram showing an example of a machining program created by an operator.

Figure 3 is a schematic diagram showing priority indicators in the process sequence database; Figure 4 is a flowchart showing an example of a process sequence discrimination program; Figure 5 is a diagram showing how the process order is changed based on the priority index. FIG. 6 is a schematic diagram showing an example of a machining program. FIG. 6 is a schematic diagram showing an example of a machining program in which the process order shown in FIG. 5 is further changed by an operator. FIG. 7 is a flowchart showing an example of a learning program. It is.

A numerically controlled machine tool 1 to which the machining control method according to the present invention is applied has a main control section 2, as shown in FIG. Input control section 5
1 display control unit 6, machining program memory 7, process sequence control unit 9, process sequence learning control unit 10, process sequence database 11, process control unit 12, etc. are connected. and,
An input device 5a such as a keyboard is connected to the input control section 5, and a display 6a is connected to the display control section 6.
is connected.

Since the numerically controlled machine tool 1 has the above configuration,
Prior to machining, an operator inputs and creates a machining program PRO1 by inputting information from the input device 5a while looking at the display 6a.

That is, as shown in FIG.
A machining program PR○ is created by combining programs related to A, MPF, MPB, and Mpz. At this time, each machining process M in the machining program PRO□
P D, M P c, M P A, M P F,
There is no need to consider the order of MPB and MP, that is, the process order ps.

Therefore, input creation for machining program PRO is as follows.

It can be performed even by an operator with little experience or specialized knowledge regarding each processing process MP, and can be performed in a short time. Note that if the machining program PR○1 is used for machining as it is, the process order PS is not taken into account, so there is a risk that proper machining will not be performed.

The input and created machining program PRO1 is then stored in the machining program memory 7.

When the operator inputs a command to change the process sequence PS from the input device 5a prior to machining, the main control unit 2 instructs the process sequence control unit 9 to change the process sequence PS stored in the machining program memory 7. Process sequence PS of program PRO1
command a change in.

Then, the process sequence control section 9 reads the machining program memory 7.
The processing program PRO is read out from the process sequence database 11, and the relative permutation table MTB shown in FIG. 3 is read out from the process sequence database 11.
The relative permutation table MTB from which . That is, for any two processing steps MP, , MP, (i or j is A, B, C, etc.), two priority indicators'
! sM s J , M J t (0≦Mo≦1, M
tJ+MJt=1) is stored, and the priority index ML
j is the machining process MP in the past machining, and is the machining process MP
, and conversely, the priority index MJl indicates the degree to which machining process MP was prioritized over machining process MPt in past machining.

Then, as will be described later, the process sequence control unit 9 compares the two priority indicators MIJ and J (and determines that M t J > M
In the case of Jl, it is determined that the machining process MPl is given priority over the machining process MP, and in the case -M t J < M jl, it is determined that the machining process MPJ is given priority over the machining process MP. .

That is, the process sequence control unit 9 selects each of the machining programs PR01 shown in FIG. 2 from among the many priority indicators M in the relative permutation table MTB based on the process permutation determination program PSP shown in FIG. Priority index M between processing steps MP
is sequentially read out, and based on the priority index M, the process order ps of each machining process MP in the machining program PRO□ is determined.
change. Although the present invention can be implemented in conjunction with various known sorting methods, a case will be described below in which the process order PS is changed based on a so-called basic selection method.

First, the processing step MP to be performed first, that is, the process order PS
The machining process MP to be set to "l" is determined. That is, in step STI of FIG. 4, in the machining program Durham PRO1 of FIG. 2 created by the operator.

Processing process MPD of process sequence PS “1” and process sequence PS
Processing step M Pc of "2'" is selected as a comparison target. Then, in step ST2 in FIG. 4, the two processing steps M P n and M P are calculated from the relative permutation table MTB in FIG. 3.
Two priority indicators MDC (=0.3) regarding between c,
Read the MCD (=0.7). In addition, the program related to each machining process MP in the machining program PRO1 includes:
Appropriate control codes representing the relevant machining process MP are stored in a form corresponding to the relative permutation table MTB, and the process sequence control unit 9 reads out the priority index M based on the control code, so that the predetermined priority index Reading M is easy.

Then, in step ST3 in FIG. 4, the two read priority indicators MDc and MaD are compared. Then, in this case, the processing step M P! The priority index MDC (=0.3
), the priority index #sMcD (=0.7) indicating that the machining process MPC is given priority over the machining process MPD is larger, that is, the machining process MPC to be given priority is machining in the machining program PRO Since the process order PS is set to be after process MPD, step ST4 is entered. Then, the program for machining process MPt in the machining program PRO□ is replaced with the program for machining process MP, and machining process M performs machining process MPc first.
P, that is, the process order PS is "1", and the processing process MPD is 2.
It is assumed that the processing step MP is the second to be performed, that is, the step order is PS “2”. Furthermore, return to step STY from step ST5,
This time, the processing process MP of process order PS “1” (last time,
A replacement was made. ) and the third processing process MP,
That is, regarding the processing process MPA of process order Ps'''3'',
Priority index ilAM c A, M A as described above
Compare C. Then, the priority index M. A(=0.2
) is larger than the priority index @MAc (=O, S), so the machining program related to the machining process MPC in the machining program PRO and the program related to the machining process MPA are swapped, and the machining process MPA is changed to the process order PS"'1''
The machining process MPc is given a process order PS″3″.

Furthermore, the processing process MP of the process sequence PS “I I+
Compare the priority indicators MAF and MFA regarding the machining process MP A (replaced last time) and the machining process MP to be performed fourth, that is, the machining process MPF of process order PS "4", but in this case, the priority Since the index MAr (= O-9) is larger than the priority index MFA (=0.1), replacing the program related to the machining process MPA and the program related to the machining process MP in the machining program PRO without performing the processing step MPA in the process order PS “1”,
Leave the machining process MP as the process order PS "4", and in the same way, process the machining process MPA (with the process order PS "1")
) and process order PS
Comparing the priority indexes M for the machining process MP of "5", and the machining process MP of process order PS "6", the priority index 'RM' indicates that priority is given to the machining process MPA in both cases.
A B, M A! is the priority index M! 1 A
, M! Since it is larger than A, the machining process MPA is determined as the process sequence ps"1" without replacing the programs regarding each machining process MP in the machining program PRO1.

Next, the processing step MP to be performed second, that is, the process order P
The machining process MP to be set to S"2" is determined. That is, the machining process MP with the process order ps "2" in the machining program PRO□, and the process order ps "3", '1471, "5#1"
．． Priority finger 115 regarding each machining process MP of 1j6”
Compare M I J and M41, and if M1J≧MJi, leave the process sequence PS'''2'' as the processing process MP, and if M I J < M J 1, change the process sequence PS''2''. is replaced with the corresponding processing step MP. In this way, by sequentially replacing the machining process MPL of the process sequence PS"2", the machining process MP is finally determined as the process sequence PS"2".

Similarly, for the process sequence PS "3" or less, the process sequence p in the machining program PRO is
The machining process MP1 of s and the priority indicators M, J, MJ regarding the machining processes MPJ after the process order PS are successively compared to determine the machining process MP of the process order PS. Then, as shown in FIG. 5, the machining process MPC is in the process order PS "3", the machining process MPD is in the process order PS "4", the machining process MP is in the process order PS "5", and the machining process MP is the process The order PS is determined to be "6".

In this way, when the machining program PRO2 shown in FIG. If you look at the machining program PRO on the display 6a and decide that the process order PS is OK as it is, the input device 5a
Input the machining start command from . Then, the main control unit 2
The machining program PR○2 is read from the machining program memory 7, and the machining control unit 12 is instructed to perform machining based on the machining program PRO2. Then, the machining control unit 12 executes the machining process MPA based on the process order PS instructed by the machining program PRO2.
, MPB, MPc, M P D, M P ! , M
Processing is performed in the order of PF. Therefore, the process order P in the above-mentioned machining program PRO that was input and created by the operator is
Even if S is inappropriate, processing is performed in the proper process order PS based on the process program PRO2 in which the process order PS has been changed.

Further, if the operator looks at the machining program PR02 on the display 6a and determines that the process order PS is not appropriate, the operator can further change the process order by inputting an appropriate process change command from the input bag W5a. You can also change the PS.

For example, through the input bag M5a, the machining process M P c and the machining process M in the machining program PRO shown in FIG.
By replacing P and D, the machining program PR shown in Fig. 6 is created.
It is also possible to create O1. Then, the process order P
The machining program PRO, in which S has been changed, is stored in the machining program memory 7.

When the operator inputs a machining start command from the input device 5a, the main control unit 2 reads the machining program PR03 from the machining program memory 7, and the machining control unit 12
is instructed to perform machining based on the machining program PRO.

Then, the machining control unit 12 executes the machining process M based on the process order PS instructed by the machining program PRO1.
P A, M P B, M P r3, M Pc, M
Processing is performed in the order of Pg, M P P.

In this way, the main control unit 2 performs machining via the machining control unit 12 based on the machining program PRO in which the process order PS has been optimized, or the machining program PRO.
The process permutation learning control unit 1o executes the process based on the machining program PRO or the machining program PR○, which reflects the specialized knowledge and experience of the operator by being changed and confirmed by the operator as described above. A command is given to update the permutation database 11.

Then, the process sequence learning control unit 10 changes the process from the input device 5a based on the process sequence PS of the machining program PR○ used for machining according to the learning program SRP shown in FIG. If no command is input, the process sequence database is based on the process sequence PS of the machining program PRO, and if a process change command is input from the input device 5a, the process sequence PS is based on the process sequence PS of the machining program PRO. The priority index iRM in the relative permutation table MTB stored in 11 is updated.

Hereinafter, a case will be described in which the priority index @M is updated based on the process order PS of the machining program PRO.

First, in step SPI, arbitrary two machining processes MP, for example, machining process MPA and machining process M P m, are selected from a plurality of machining processes MP in the machining program PRO. Then, in step SP2, it is determined whether the machining process MPA has been given priority over the machining process MPB. In the machining program PRO1, the machining process MP
Since A has been given priority over the machining process M P *, step SP3 is entered and the update data RAM is set to ``1'' (or the update data RIA is set to ``lOl''). Then, in step SP5, the two processing steps M P A
, M P n for two priority indicators MAI1.
Update MBA using the following formula.

(MAB) Kuzu” a X (MA!+) -x + (l a) X
RAB=0.3x0.7+〇, 7xl=0.91(MB
A) ---, = 1 (MAR) ---= 0,
09, the value of priority index MA11 becomes II Q ,
Since it is updated from 771 to "0.91", the machining process M
The priority of P^ to the processing process M P m becomes even higher.

Accordingly, the value of the priority index MBA is '0.3'
This decreases from 0.09 to 0.09.

In the above equation, "a (=0.3)" is a weighting coefficient for past experience, and if the value of "all" is large, the process order ps in the current machining is the priority index M
If the value of It all is small, the process order PS for this machining is not reflected in the update of priority index #AM.
will be more easily reflected in updates.

Therefore, in this embodiment, 'a' is set to a relatively small value of "0.3", so that the priority index M reflects the latest process order PS.

In addition to setting the value of the weighting coefficient "a'" as a parameter as shown in FIG. 7, the value can also be changed by the operator via the input device 5a.Similarly,
The priority index M between each machining process MP in the machining program PRO is updated.

Then, in determining the process sequence PS thereafter, the process sequence control unit 10 performs change setting of the process sequence PS based on the updated priority index M. Therefore, by updating the priority index M, the specialized knowledge and experience of the worker, which is difficult to theoretically construct, can be utilized in determining the process order PS, and processing can be performed in the optimal process order PS. I can do it.

For example, as described above, the process order PS in the machining program PRO2 changed by the process sequence control unit 1°
The priority indicators MCD and MDC regarding the machining process MPC and machining process MPD, which have been further changed, are the learning program S
In RP, (MCD), +i=0.7 to (MCD
) ---= 0 , 21 and updated to (MD
C) −14=0, 3 to (MBC) ---=Q
, 79. That is, the updated priority index (Mc
D)---1(M D C) -, (Mc
D) ,,, (=0.21) < (MDc) ,,
, (=0.79). Therefore, in the next machining, when the process sequence control unit 10 changes the process order PS of the machining program PRO, the machining process M P ry is given priority over the machining process MPC. Therefore, the specialized knowledge and experience of the workers involved in determining the previous process order PS is reflected in the determination of the subsequent process order PS.

(g) 0 Effects of the Invention As explained above, according to the present invention, based on the machining program PRO, the numerical value for machining related to a plurality of machining processes MP in the process order PS instructed by the machining program PRO In the controlled machine tool 1, a priority index M indicating the priority among multiple machining processes MP in past machining
is stored in the process permutation database 11, and prior to machining based on a first machining program such as machining program PR01 consisting of a plurality of machining processes MP, each machining process in the machining program of the section 1 is stored from the process permutation database 11. The priority index 4MM related to MP is read out, and based on the priority index M, the process order PS of each machining process MP in the first machining program is changed, and the second machining program PR02, PRO, etc. A machining program is generated, and machining is performed based on the second machining program in which the process order PS has been changed.

Process order p of each machining process MP in the second machining program
s is determined based on the priority index M, and machining is performed in an appropriate process order PS based on the second machining program. Therefore, there is no need for the operator to determine the process order PS of each machining process MP when creating the first machining program, so even an operator who does not have specialized knowledge or experience with each machining process MP can create the machining program PRO. It is also possible to create a machining program PRO in a short time.

Further, the present invention provides a numerically controlled machine tool 1 that performs machining related to a plurality of machining processes MP in a predetermined process order ps.
A priority index MiJ indicating the priority of the first machining process MP1 with respect to the second machining process MP is set, and based on the priority index 'fA M I J, the first machining process MP and The process order PS of the second machining process MPJ is determined, and the process order PS is output to an output device such as the display 68.

If there is no process change command from the process order change means such as the input device 58, processing is performed based on the determined process order ps, and if there is a process change command from the process order change means, Since the determined process order PS is changed based on the instruction and the processing is performed based on the changed process order PS, when determining the process order PS regarding the plurality of processing steps MP, It is possible to determine the process sequence PS without involving the operator, and it is also possible to determine the process sequence PS in a manner that reflects the specialized knowledge and experience of the operator, so that processing can be performed using the optimal process sequence PS. can be done.

Further, one aspect of the present invention provides a numerically controlled machine tool 1 that performs machining related to a plurality of machining processes MP in a predetermined process order ps.
A priority index MtJ indicating the priority of the first machining process MP with respect to the second machining process MP is set, and based on the priority indicators M and J, the first machining process MP and the In addition to determining the process order ps of the processing process MP of 2,
The process order PS is output to an output device such as the display 68, and if there is no process change command from the process order change means such as the input device 5a, processing is performed based on the determined process order PS, and the When there is a process change command from the process order changing means, the determined process order PS is changed based on the command, and processing is performed based on the changed process order PS. When the machining process MP is prioritized over the second machining process MP, the priority index M is set so that the priority becomes high.
The question has been updated, and in the processing, the second processing step MP,
is given priority to the first machining process M P I, the priority index Mi is set so that the priority becomes low.
Since the configuration is configured to update J, it is not only possible to determine the process sequence PS in a manner that reflects the specialized knowledge and experience of the worker, but also to determine the priority based on the determined process sequence PS. Since the index Mlj is updated, the expertise and experience of the workers who were involved in determining the previous process sequence PS is used to determine the next process sequence PS based on the updated priority index M. It can be reflected,
An appropriate process order PS can be determined.

[Brief explanation of drawings]

FIG. 1 is a control block diagram showing an embodiment of a numerically controlled machine tool to which the processing control method according to the present invention is applied; FIG. 2 is a schematic diagram showing an example of a processing program created by an operator; The figure is a schematic diagram showing priority indicators in a process permutation database. FIG. 4 is a flowchart showing an example of a process sequence determination program. Figure 5 is a schematic diagram showing an example of a machining program in which the process order has been changed based on the priority index, and Figure 6 is an example of a machining program in which the process order shown in Figure 5 has been further changed by the operator. Schematic diagram showing. FIG. 7 is a flowchart showing an example of a learning program. l... Numerical control machine tool 5a... Process order changing means (input device! ri 6a...
...Output device W (display) 11...
Process permutation database PRO...Machining program MP...Machining process ps...Process sequence M...Priority index

Claims (3)

[Claims] (1) Indicates the priority among multiple machining processes in past machining in a numerically controlled machine tool that performs machining related to multiple machining processes in the process order instructed by the machining program based on the machining program. A priority index is stored in a process sequence database, and prior to machining based on a first machining program consisting of a plurality of machining processes, the priority index regarding each machining process in the first machining program is stored from the process sequence database. and generate a second machining program by changing the process order of each machining process in the first machining program based on the priority index, and generating the second machining program with the changed process order. A machining control method for a numerically controlled machine tool configured to perform machining based on a program. (2) In a numerically controlled machine tool that performs machining related to a plurality of machining processes in a predetermined process order, a priority index indicating the priority of the first machining process over the second machining process is set, and the priority determines the process order of the first machining process and the second machining process based on the degree index, and outputs the process sequence to an output device, and if there is no process change command from the process sequence changing means,
Processing is performed based on the determined process order, and if there is a process change command from the process order changing means, the determined process order is changed based on the command, and the changed process is performed. A machining control method for a numerically controlled machine tool configured to perform machining based on sequence. (3) In a numerically controlled machine tool that performs machining related to a plurality of machining processes in a predetermined process order, a priority index indicating the priority of the first machining process over the second machining process is set, and the priority determines the process order of the first machining process and the second machining process based on the degree index, and outputs the process sequence to an output device, and if there is no process change command from the process sequence changing means,
Processing is performed based on the determined process order, and if there is a process change command from the process order changing means, the determined process order is changed based on the command, and the changed process is performed. performing processing based on the order; in the processing, if a first processing step is prioritized over a second processing step, updating the priority index so that the priority becomes higher; A numerically controlled machine tool configured to update the priority index so that when a second machining step is prioritized over the first machining step in the machining, the priority index becomes lower. Processing control method.