JPS63313206A - Nc servo-simulator - Google Patents

Abstract

PURPOSE:To exactly execute a confirmation by providing a storage part for storing a mechanical and electrical constant and a transfer function, etc., of a machine tool loaded with an NC device, and a servo-constant of the NC device. CONSTITUTION:An NC data input part 1 for inputting an NC data which has been programmed by an NC data automatic program generating device (a) is provided in an NC device in order to work an object to be worked 10. A storage memory 2 which has stored a mechanical and electrical constant, etc., of a machine tool loaded with the NC device is provided in parallel on said part. This storage data and said program are connected to a simulation part 3, and also, a display monitor 4 is connected. Moreover, a feedback signal receiving part 5, a comparing part 6 and an alarm 7 are provided. In this state, when said input part 1 receives a generated working program, the simulation of a tool locus is executed from said program and the storage data of the memory 2. As a result, when a shift against an actual tool locus exceeds a prescribed value, it is decided that there is the abnormality, and warning is issued.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to a simulation device for an NC device, and in particular, a simulation device that simulates an NC device, and in particular a simulation device that is closer to the actually measured state in which the characteristics of a machine tool are understood than the program of an automatic NC program creation device. The present invention relates to an NC servo simulator that performs simulation.

(Prior Art) There was no device for simulating a program created in a conventional NC automatic program creation device. If this were to be done using a conventional device, it would simply read out the contents programmed by the automatic program creation device as is.

(The point of intersection that the invention attempts to solve) However, the NC data programmed by the conventional NC automatic program creation device is different from the actual programmed program because it programs only the command trajectory of the machine tool used by the NC device. There will be a difference in the tool trajectory.

For example, assume that it is processed into a shape as shown in FIG.

At this time, although the program itself is as shown by the solid line (a), the actual tool will follow a trajectory as shown by the broken line (b). Therefore, when the NC data was directly used as a command value, it was different from the actual tool trajectory.

It has been desired to develop a simulator that can simulate the actual movement of such tools.

[Structure of the Invention] (Means for Solving the Problems) An NC data input section into which a machining program for an NC device created by an automatic program creation device or the like is input;
A storage unit is provided to store mechanical and electrical constants, transfer functions, etc. of the machine tool on which the device is mounted, and servo constants of the NC device. A simulation section for simulating the trajectory of a tool of a machine tool from the data stored in the storage section and a program received by the NC data input section, and a display section for displaying the simulation results of the simulation section are provided.

Furthermore, a feedback signal input section that receives a feedback signal of the tool trajectory from the NC device is provided, and a comparison section that compares the feedback signal received by the feedback signal input section with the result of simulation performed by the simulation section; The device is equipped with a notification section that notifies a change in setting data when the comparison result is not within a predetermined accuracy.

(Function) When the NC servo simulator is configured as described above, N
The C data input section receives a machining program for the NC device created by an automatic program creation device or the like. Based on this and the servo data of the machine tool stored in the storage section, the simulation section simulates the tool trajectory. This makes it possible to perform simulations that eliminate the deviation from the tool trajectory actually drawn by the machine tool, which occurs when based only on the NC data of conventional programs.

Further, the comparison section compares and confirms the tool trajectory simulated by the simulation section and the actual tool trajectory. As a result, if there is a discrepancy between the two that exceeds the predetermined accuracy, it is determined that there is some kind of abnormality in the stored data or the machine tool, etc., and the operator is notified of the data change. is now possible.

(Example) An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of the present invention, and FIG. 2 shows the connection state between the present invention and related devices. Workpiece equipped with NC device (10)
For processing, an NC data input unit (1) is provided for inputting NC data programmed by an automatic NC data program creation device. This and the memory (2) that stores the mechanical and electrical constants and transfer functions of the machine tool equipped with the NC device, as well as the servo constants of the NC device.
are arranged side by side. A simulation section (3) is connected to which the data stored in the storage memory (2) and the program received by the NC data input section (1) can be input. Next, a display monitor (4) is connected so that the results of this simulation section (3) can be displayed.

Furthermore, a feedback signal receiving section (5) receives a feedback signal of the trajectory of the actual tool (11) from the NC device.
) is provided. Feedback signal receiving section (5)
A comparison unit (6) that compares the feedback signal received by the controller and the result of simulation performed by the simulation unit (3) is connected to the feedback signal receiving unit (5) and the simulation unit (3), respectively. An alarm device (7) is connected to this comparison section (6).

Next, the operation of this embodiment will be explained. An NC data input section (1) receives a program created by the NC automatic program creation device as NC data. This received N
If a simulation is performed based on the C data, a diagram as shown by the solid line (a) in FIG. 3 will be obtained. However, this is N
This is because the C automatic program creation device performs programming as a command value for the NC machine tool, and when actually performed, a tool trajectory as shown by the broken line (b) is drawn. Here, data such as mechanical and electrical constants and transfer functions of the machine tool stored in the storage memory (2) are transferred to the simulation unit (
3) and take this into account in the simulation. This simulation result is displayed on the display monitor (4).

Furthermore, the following functions are available to check whether this simulation is being performed correctly. Normally, the NC device is feedback-controlled by a detection section provided in the machine tool. Using this feedback signal, a feedback signal receiving section (5) receives the feedback signal from the NC device. The comparison section (6) compares the position information obtained from this feedback signal force () with the simulation result obtained by the simulation section (3). Comparison section (6
), it is checked whether the difference between these two is within a predetermined accuracy d. When this result exceeds precision d, storage memory (2
) is determined to be incorrect or the machine tool is incorrect, and an alarm (7) is used to notify the operator, etc.

In this embodiment, the simulator is described as a stand-alone device, but the simulator may be configured to be incorporated in an automatic NC servo programming device.

[Effects of the Invention] As described above, by using the present invention, it becomes possible to perform more accurate simulation than conventional simulators. Furthermore, by comparing the feedback signal from the machine tool and the simulation signal, it is possible to check whether the simulation was performed correctly.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention, FIG. 2 is a schematic diagram showing the connection between the present invention and related devices, and FIG. 3 is an explanatory diagram for explaining the simulation of the present invention. 1...NC data input section, 2...memory memory, 3.
...Simulation section, 4.Display monitor, 5.Feedback signal input section,

Claims (2)

[Claims] (1) N created by an automatic program creation device, etc.
An NC data input section that inputs the machining program of the C device, a storage section that stores the mechanical and electrical constants and transfer functions of the machine tool equipped with the NC device, and servo constants of the NC device; Based on the stored data, the above N
1. An NC servo simulator comprising: a simulation section that simulates the trajectory of a tool of a machine tool from a program input by a data input section; and a display section that displays simulation results of the simulation section. (2) a feedback signal input section that receives a feedback signal of the tool trajectory from the NC device; a comparison section that compares the feedback signal received by the feedback signal input section with the results of simulation performed by the simulation section; The NC servo simulator according to claim 1, further comprising a notification section that notifies a change in setting data when the comparison result is not within a predetermined accuracy.