JPWO2023053400A5

JPWO2023053400A5 -

Info

Publication number: JPWO2023053400A5
Application number: JP2022517516A
Authority: JP
Filing date: 2021-09-30
Publication date: 2023-09-06
Anticipated expiration: 2041-09-30

Description

上述した課題を解決し、目的を達成するために、本開示の数値制御装置は、加工対象物を加工するための工具または加工対象物を回転させる主軸を駆動する主軸駆動系と、工具および加工対象物の相対位置を変化させる送り軸を駆動する送り駆動系と、を含む駆動系を有する工作機械に運転指令を与えることによって、工作機械を制御する数値制御装置であって、駆動系を制御する制御器の制御特性を表す制御特性パラメータの組であるパラメータセットを生成する制御特性設定部と、パラメータセットが示す制御特性を有する制御器を用いて工作機械を制御した場合の加工をシミュレーションした結果を示すプロセス情報を、駆動系の動作と、工作機械の動作中に振動を生じる構造物のダイナミクスとが、工具による加工対象物の加工プロセスに与える影響を含めて算出する連成シミュレーション部と、複数のパラメータセットのそれぞれを用いたときのプロセス情報を評価し、複数のパラメータセットの中から評価結果に基づいて工作機械の制御に用いるパラメータセットを選択するプロセス評価部と、を備え、プロセス情報は、切り取り厚さ、切削力、および、外乱力のうちの１つ以上であることを特徴とする。
In order to solve the above-described problems and achieve the object, the numerical control device of the present disclosure includes a spindle drive system for driving a tool for machining an object to be machined or a spindle for rotating the object to be machined; A numerical controller for controlling a machine tool by giving an operation command to a machine tool having a drive system including a feed drive system for driving a feed shaft that changes the relative position of an object, the drive system being controlled. Machining is simulated when a machine tool is controlled using a control characteristic setting unit that generates a parameter set, which is a set of control characteristic parameters representing the control characteristic of a controller that controls the A coupled simulation unit that calculates the process information indicating the results, including the influence of the operation of the drive system and the dynamics of the structure that causes vibration during the operation of the machine tool on the machining process of the workpiece by the tool. a process evaluation unit that evaluates process information when each of the plurality of parameter sets is used, and selects a parameter set to be used for controlling the machine tool from among the plurality of parameter sets based on the evaluation result ; The information is characterized by one or more of cut thickness, cutting force, and disturbance force .

Claims

a spindle drive system for driving a tool for machining a workpiece or a spindle for rotating the workpiece; and a feed drive system for driving a feed shaft for changing the relative positions of the tool and the workpiece. A numerical controller for controlling a machine tool by giving an operation command to the machine tool having a drive system including
a control characteristic setting unit that generates a parameter set, which is a set of control characteristic parameters representing control characteristics of a controller that controls the drive system;
process information indicating results of simulation of machining when the machine tool is controlled using a controller having the control characteristics indicated by the parameter set; A coupled simulation unit that calculates the dynamics of the structure including the influence of the tool on the machining process of the workpiece;
a process evaluation unit that evaluates the process information when each of the plurality of parameter sets is used, and selects the parameter set to be used for controlling the machine tool from among the plurality of parameter sets based on the evaluation result;
with
A numerical controller , wherein the process information is one or more of cutting thickness, cutting force, and disturbance force .

The coupled simulation unit includes a spindle drive control model that is a mathematical model representing the spindle drive system and a spindle drive controller that is the controller that controls the spindle drive system, and the feed drive system and the feed drive. The control characteristic parameter in the feed drive control model, which is a mathematical model representing the feed drive controller, which is the controller for controlling the system, is set to the value indicated by the parameter set, and the machining between the tool and the workpiece is performed. Designated machining conditions are used for a machining process model that is a mathematical model representing characteristics, a dynamics model that is a mathematical model representing dynamic characteristics of the structure, the spindle drive control model, and the feed drive control model. 2. The numerical controller according to claim 1, wherein the process information when the operation command is given is calculated for each parameter set.

a storage unit for storing the machining process model, the dynamics model, the spindle drive control model, the feed drive control model, and machining condition information representing the machining conditions;
further comprising
The coupled simulation unit generates the process information using the machining process model, the dynamics model, the spindle drive control model, the feed drive control model, and the machining condition information stored in the storage unit. 3. The numerical controller according to claim 2, wherein:

4. The numerical controller according to any one of claims 1 to 3, wherein the control characteristic setting section generates parameter sets in which the values of the control characteristic parameters of the plurality of controllers are different.

The control characteristic setting unit is characterized in that the gain response or phase response of a system obtained by synthesizing the feed drive system and the structure generates the parameter sets that differ from each other for each movement direction of the feed drive system. A numerical controller according to any one of claims 1 to 4.

6. The numerical controller according to any one of claims 1 to 5, wherein the control characteristic setting unit changes the control characteristic parameter over time.

The control characteristic setting unit determines that a gain response or a phase response of a system obtained by synthesizing the feed drive system and the structure is set so that the relative feed direction of the tool with respect to the workpiece and the normal direction of the feed direction 7. The numerical controller according to claim 6, wherein said parameter sets different from each other are generated by and.

The numerical controller according to any one of claims 1 to 7, wherein the control characteristic setting section generates the parameter set based on the process information.

a learning data acquisition unit that acquires learning data including the process information and the parameter set corresponding to the process information;
a model generation unit that uses the learning data to generate a trained model for inferring a new parameter set from the process information;
9. The numerical controller according to claim 8, further comprising:

a data acquisition unit that acquires the process information;
an inference unit that outputs a new parameter set from the process information acquired by the data acquisition unit using a trained model for inferring a new parameter set from the process information;
10. The numerical controller according to claim 8 or 9, further comprising:

the machine tool includes a sensor that detects vibration of the structure being processed and outputs a sensor signal;
further comprising
The numerical controller according to any one of claims 1 to 7, wherein the control characteristic setting section generates the parameter set based on the sensor signal.

a learning data acquisition unit that acquires learning data including the sensor signal and a parameter set corresponding to the sensor signal;
a model generation unit that generates a trained model for inferring a new parameter set from the sensor signal using the learning data;
12. The numerical controller according to claim 11, further comprising:

a data acquisition unit that acquires the sensor signal;
an inference unit that outputs a new parameter set from the sensor signal acquired by the data acquisition unit using a trained model for inferring a new parameter set from the sensor signal;
13. The numerical controller according to claim 11 or 12, further comprising:

a spindle drive system for driving a tool for machining a workpiece or a spindle for rotating the workpiece; and a feed drive system for driving a feed shaft for changing the relative positions of the tool and the workpiece. a machine tool having a drive train including
a numerical controller that controls the machine tool by giving an operation command to the machine tool;
with
The numerical controller is
a control characteristic setting unit that generates a plurality of parameter sets, which are sets of control characteristic parameters representing control characteristics of a controller that controls the drive system;
For each of the plurality of parameter sets, the operation of the drive system and the a coupled simulation unit that calculates including the influence of the dynamics of a structure that causes vibration during operation of the machine tool on the machining process of the object to be machined by the tool;
a process evaluation unit that evaluates the process information when each of the plurality of parameter sets is used, and selects the parameter set to be used for controlling the machine tool from among the plurality of parameter sets based on the evaluation result; ,
with
The processing system , wherein the process information is one or more of cutting thickness, cutting force, and disturbance force .

a learning data acquisition unit that acquires learning data including the parameter set generated by the numerical control device and the process information indicating a simulation result when the machine tool is controlled using the parameter set;
a model generation unit that uses the learning data to generate a trained model for inferring a new parameter set from the process information;
15. The processing system of claim 14, further comprising a learning device having a.

a data acquisition unit that acquires the process information generated by the numerical controller;
an inference unit that outputs a new parameter set from the process information acquired by the data acquisition unit using a trained model for inferring a new parameter set from the process information;
16. The processing system of claim 14 or 15, further comprising a reasoning device having a .

The machine tool further has a sensor that detects vibration of the structure during operation and outputs a sensor signal,
a learning data acquisition unit that acquires learning data including the parameter set generated by the numerical control device and the sensor signal when the machine tool is controlled using the parameter set;
a model generation unit that generates a trained model for inferring a new parameter set from the sensor signal using the learning data;
15. The processing system of claim 14, further comprising a learning device having a.

The machine tool further has a sensor that detects vibration of the structure during operation and outputs a sensor signal,
a data acquisition unit that acquires the sensor signal while the machine tool is in operation;
an inference unit that outputs a new parameter set from the sensor signal acquired by the data acquisition unit using a trained model for inferring a new parameter set from the sensor signal;
18. The processing system of claim 14 or 17, further comprising a reasoning device having a .

a spindle drive system for driving a tool for machining a workpiece or a spindle for rotating the workpiece; and a feed drive system for driving a feed shaft for changing the relative positions of the tool and the workpiece. A numerical control method for controlling a machine tool having a drive system comprising:
a step of generating a plurality of parameter sets, which are sets of control characteristic parameters representing control characteristics of a controller that controls the drive system;
For each of the plurality of parameter sets, the operation of the drive system and the calculating the dynamics of a structure that causes vibrations during operation of the machine tool, including the impact on the machining process of the workpiece by the tool;
evaluating the process information when using each of the plurality of parameter sets, and selecting the parameter set to be used for controlling the machine tool from among the plurality of parameter sets based on the evaluation result ;
including
The numerical control method , wherein the process information is one or more of cutting thickness, cutting force, and disturbance force .

a spindle drive system for driving a tool for machining a workpiece or a spindle for rotating the workpiece; and a feed drive system for driving a feed shaft for changing the relative positions of the tool and the workpiece. A machining method for machining the workpiece by controlling the drive system of a machine tool having a drive system including
a step of generating a plurality of parameter sets, which are sets of control characteristic parameters representing control characteristics of a controller that controls the drive system;
For each of the plurality of parameter sets, the operation of the drive system and the calculating the dynamics of a structure that causes vibrations during operation of the machine tool, including the impact on the machining process of the workpiece by the tool;
evaluating the process information when using each of the plurality of parameter sets, and selecting the parameter set to be used for controlling the machine tool from among the plurality of parameter sets based on the evaluation result ;
controlling the machine tool using the selected set of parameters;
a step of operating the drive system according to the control using the parameter set to machine the workpiece using the tool;
including
The processing method , wherein the process information is one or more of cutting thickness, cutting force, and disturbance force .