JPH04111005A - Nc device - Google Patents

Abstract

PURPOSE:To obtain the actual working shape without executing newly a measurement after working by measuring a motion of each driving part of a working machine at the time of working, and also, deriving by a calculation an actual working shape and state from working conditions such as a shape of a tool and shape data of a work, etc. CONSTITUTION:The device is provided with a detecting means 8 for detecting a driving state of each driving part of a working machine 4, a first storage means 9 for inputting and storing detection data from the detecting means 8, and a second storage means 10 for inputted and storing a working condition and theoretical working shape data. Also, this device is provided with an actual shape calculation processing means 11 for reading out each data stored from a first and a second storage means 9, 10, and calculating a shape worked actually. Moreover, this device is provided with a means 12 for displaying actual shape data from the actual shape calculation processing means 11, and a means 13 for storing the actual shape data from the actual shape calculation processing means. In such a way, after working of a work is completed, the working shape can be known without measuring newly the shape, and it is possible to cope quickly with the next working.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an NC device for numerically controlling a processing machine, and in particular to knowing the shape of a workpiece actually machined by the processing machine without removing it from the processing machine. This relates to an NC device that can perform

[Conventional technology]

A conventional NC device had a structure as shown in FIG.

In FIG. 4, an NC program input unit 4 inputs an NC program for machining a workpiece (hereinafter referred to as a work).
1 and store it in the NC program storage section 42. Here, when the execution of the NC device starts, NC11 @ section 4
3 reads out the inputted NC program from the NC program storage section 42 and controls the processing machine accordingly.

Further, the ideal shape calculation processing section 45 reads the NC program from the NC program storage section 42, calculates the ideal shape of the workpiece to be machined, and displays the data on the ideal shape display section 46.

The conventional NC device configured in this manner calculates the display of the machined shape based on the data of the NC program when processing the workpiece, and displays the result.

[Problem to be solved by the invention]

In the conventional technology as described above, in order to know the actual machined shape, new measurements had to be taken using a separately provided measuring machine.

For this reason, removing the workpiece from the processing machine and attaching it to the measuring machine not only takes a lot of time for positioning, etc.
There is a problem in that depending on the mounting conditions on the measuring machine, the measurement accuracy may be affected due to deformation of the workpiece or the like.

There was also the problem that machining had to be temporarily interrupted while waiting for measurement results.

Furthermore, some workpieces require complicated measurements depending on the shape to be machined, in which case a large number of measurement points are required. Therefore, there were problems in that it took a long time to measure and caused unexpected measurement errors.

An object of the present invention has been made in view of such conventional problems, and it is an object of the present invention to provide an NC device that can obtain a machined shape without removing the workpiece from a processing machine.

[Means to solve problems]

For the above purpose, in the present invention, the processing machine
In the NC device, the NC device has an NC control section 3 for controlling the processing, and includes: a detection means 8 for detecting the driving state of each drive section of the processing [14]; and a first detection means 8 for inputting and storing detection data from the detection means 8.
reading each stored data from the storage means 9; a second storage means 10 for inputting and storing the machining conditions and the theoretical machining shape data; and the first and second storage means 9.10; an actual shape calculation processing means 11 for calculating the actually machined shape based on the data; a means 12 for displaying the actual shape data from the actual shape calculation processing means 11; and a means for displaying the actual shape data from the actual shape calculation processing means 11. A means 13 for storing actual shape data, and a means for solving the problem are provided.

[For production]

In the present invention, the movement of each drive part of the processing machine during machining is measured, and the actual machining shape state can be calculated from the machining conditions such as tool shape and workpiece shape data. The actual machined shape can be obtained without performing new measurements after processing the item.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the NC device according to the present invention.

In FIG. 1, an NC program created for machining a predetermined shape of a workpiece is input to an NC program input section 1 and stored in an NC program storage section 2.

At the start of machining, the NC@control unit 3 reads the NC program from the NC program storage unit 2, controls the machining machine 4 according to the NC program, and processes the workpiece.

Further, the theoretical machining shape calculation processing section 5 reads the NC program data from the NC program storage section 2, calculates the theoretical machining shape to be machined of the workpiece, and displays the result on the theoretical machining shape display section 6.

Machining condition data such as the shape of the tool that opens at known values, the rotation and speed of the spindle, and the straightness of the X and Z axes are input to the static data input section 7 and stored in the static data storage section.

Further, the dynamic data measurement detection unit 8 detects operations during machining, such as the moving positions of the X-axis and Z-axis driven by workpiece machining, and the rotational speed of the workpiece. Thereafter, the dynamic data detected by the dynamic data detection unit 8 is stored in the dynamic data storage unit 9.
is memorized.

Actual shape calculation processing unit that reads the static data stored in the static data storage unit 10 and the dynamic data stored in the dynamic data storage unit as described above, and calculates the shape actually machined by the processing machine. 11 outputs the result, displays the shape on the actual shape display section 12, and causes the actual shape memory section 13 to store the data.

FIG. 3 is a diagram illustrating a display example of an actually machined shape, which is two-dimensionally displayed on the actual shape display section. Furthermore, although a two-dimensional display example is shown in the embodiment, a three-dimensional three-dimensional display is also possible, and the display method may be selected depending on the purpose.

Furthermore, the data stored in the actual shape memory section 13 can be displayed in two-dimensional or three-dimensional form using separate software.

Here, workpiece machining will be explained using FIG. 2.

FIG. 2 is a partial cross-sectional schematic diagram showing the relationship between a workpiece being processed, a tool, and a laser interferometer for position detection.

In FIG. 2, a work holder 23 is fixed to the end of a spindle 21 which is held by a holding member (not shown) so as to be able to rotate and move straight on the Z axis.
A workpiece 24 is held. Further, between the spindle 21 and the work holder 23, there is a Z-axis stage 2 which is integrally interlocked with the spindle 21 only when the spindle 21 is driven in a straight line.
2 is placed. A mirror 29 is placed at a predetermined position 1 on the Z-axis stage 22! The irradiation of laser light 30 from the laser interferometer 28 for detecting the amount of movement in the Z-axis direction is reflected and guided to the laser interferometer 28.

In addition, the tool 2 is moved in the linear direction (X direction) perpendicular to the Z axis.
An X-axis stage 26 is slidably fitted onto a sliding X-axis 25 arranged in the X direction for moving the processing portion 7, and a tool 27 is fixed to the X-axis stage 26. Furthermore, a mirror 29'' is arranged at a predetermined position on the X-axis stage 26, and reflects the 30' laser beam irradiated from the laser interferometer 28' for detecting the amount of drive in the X direction and guides it to the laser interferometer 28'. I'm there.

The operation during machining will be explained below.

Processing instructions from NC@@ Department 3 [N when 14 receives it]
The spindle 21 is rotated and linearly driven according to the procedure according to the C program, and the workpiece 24 formed integrally with the spindle 21 moves in the same manner. At that time, Z-axis stage 2
2 is interlocked only when the spindle 21 is driven in a straight line, and the laser interferometer 28 indirectly detects the amount of movement of the workpiece 24 in the Z-axis direction via a mirror 29 placed at a predetermined position 1 of the Z-axis stage 22.

At the same time, the X-axis stage 26 is driven linearly in the X direction, and the tool 27 integrated with the X-axis stage 26 moves in the same manner. However, the movement of the tool at this time is such that the machined part moves in a straight line direction (X direction) passing through the axis of the Z axis. The mirror 29 placed on the X-axis stage 26 at that time
The laser interferometer 28' indirectly detects the amount of movement of the tool 27 in the X-axis direction.

As described above, the dynamic data measuring and detecting section 8 including a laser interferometer reads the data of each position based on the amount of movement in the X direction and Z direction during the workpiece machining operation as needed and stores it in the dynamic data storage section.

After the machining is completed, the actual shape calculation processing section 11 reads each data from the static data storage section 10 and the dynamic data storage section 9 to calculate the actual shape.

This embodiment has been described as an NC device including all functions as shown in FIG. 1, but as shown by the dashed line in FIG. A host computer including a host computer may be added, or only the actual machining shape processing section 14 shown by the dotted line may be divided into a separate combination.

Note that although a two-axis processing machine is used in this embodiment, this is merely an example of a two-axis machine, and the present invention is not limited to this.

Furthermore, although the description has been made using a laser interferometer for position detection, the present invention is not limited to this; for example, an encoder may be used for detection.

〔Effect of the invention〕

As described above, according to the present invention, the machined shape can be known without having to measure the shape again after the workpiece has been machined, so that the next process can be quickly carried out.

This also has the effect of improving the throughput of the processing machine.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the NC device according to the present invention, Fig. 2 is an explanatory partial cross-sectional view showing the relationship between the workpiece, tool, and position detector during machining, and Fig. 3 is the actual FIG. 4 is a block diagram showing a conventional NC device. [Explanation of symbols of main parts] 7... Static data input section, 8... Dynamic data measurement detection section, 9...
Dynamic data storage unit, 0... Static data storage unit, l... Actual shape calculation processing unit, 2... Actual shape display unit, 3...・Actual shape memory unit, 8.28゛... Laser interferometer, 9.29'...
····mirror.

Claims (1)

[Claims] An N having an NC control unit that controls a processing machine by an NC program created based on designed theoretical processing shape data and processing conditions selected for processing the shape.
C apparatus, comprising: a detection means for detecting the driving state of each drive section of the processing machine; a first storage means for inputting and storing the detection data from the detection means; and the processing conditions and the theoretical processing shape data. a second storage means for inputting and storing the data; and an actual shape calculation process for reading each stored data from the first and second storage means and calculating an actually machined shape based on the data. An NC device comprising: means for displaying actual shape data from the actual shape calculation processing means; and means for storing shape data from the actual shape calculation processing means.