JPH0553635A - Method and device for confirming program operation of nc machine tool - Google Patents

Abstract

PURPOSE:To check a machining program on a monitor with no execution of a real operation. CONSTITUTION:An automatic programming device consists of a machining data display program part 105 where a program is displayed, a system program part 106 where an automatic programming operation is controlled, a system parameter part 107 in which the data such as a machine tool initialization setting is putted, a data file part 108 where the data on a machine main body, the tools, the work, etc., are stored, an editing program program part 109 where the machining locus of the work is produced with input of the position coordinates, and an NC machining program part 111. A desired soft is selected and shown on a display device 104 and the program 111 is carried out. Then a pseudo signal generating means 110 produces the machining end signals of each step in place of a programmable controller. Thus the operation of the program 111 is confirmed with no drive of the actual machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for confirming the operation of an interactive NC machine tool by using a monitor device. More specifically, the NC of the NC device made interactively
The present invention relates to a program operation confirmation method and an apparatus thereof for an NC machine tool which confirms the operation of a machining program without using an actual machine.

[0002]

2. Description of the Related Art A machining program for driving a numerically controlled lathe is usually created by an interactive automatic programming device or the like. However, program bugs are often found during actual operation. Therefore, it is necessary to check whether or not this program operates normally before actually moving the machine tool to machine the workpiece. This is a problem especially when the machine tool has a complicated structure as described below.

It is known that some numerically controlled (NC) machine tools have a plurality of spindles for holding a workpiece and also have a plurality of tool rests corresponding to the spindles. This type of numerically controlled machine tool realizes machining by simultaneously executing different NC programs for each tool post by one numerical control device. For example, in a numerically controlled lathe, two head stocks are arranged so that one or both of them can be moved in the main spindle axis direction (usually the Z axis line) so that the chuck faces the main spindle axis line. It is known to have two turrets. In this numerically controlled lathe, the workpieces respectively gripped by the chucks of the spindles are machined by moving the corresponding tool rests in the X and Z directions by a numerical controller.

[0004]

However, since the NC machining program for a machine tool having such a complicated structure incorporates the operation of each tool post etc., the program check is not easy even if the machine tool is actually operated. Absent. Further, when the machine tool is stopped for checking the program, the machining is stopped during the check time, and the machine tool cannot be used, which is wasteful. The present invention has been invented in such a technical background and achieves the following objects.

An object of the present invention is to display various information of the machining program on an interactive monitor screen without actually operating the machining program of the NC machine tool (idle machining of the machining of the workpiece) to perform a program check. NC for performing
Provided are a program operation confirmation method and a device thereof for a machine tool.

[0006]

Means and Actions for Solving the Problems A machining data display program section 105 for displaying a program and a system program section 106 for controlling automatic programming.
And a system parameter section 107 that stores data such as tool initial settings, and a data file section 108 that stores data related to the machine body, tools, workpieces, etc.
In the automatic programming device including the editing program unit 109 for inputting the position coordinates and creating the machining trajectory of the workpiece and the NC machining program unit 111 for NC machining, the required software is selected and displayed on the display device 104. , The NC machining program is executed, and instead of the programmable controller, the pseudo signal generating means 110 generates an end signal for the machining end of each step to confirm the operation of the NC machining program without driving the actual machine. Regarding what to do.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a machine tool of the present invention (numerical control lathe).
2 (a), 2 (b), and 2 (c) are plan views, front views, and right side views of FIG. 1, respectively, and FIG. FIG. 4 is a diagram showing the names of each axis, and FIG.
Is a functional block diagram of the automatic programming device,
FIG. 5 is an example in which each of the three series of information (position information) is aggregated on one screen, and FIG. 6 is an example in which each of the three series of information (memory information) is aggregated and displayed on one screen. a), FIG.
9B is a screen on the display device 104 of the interactive NC machine tool, FIG. 8 is a work flow of the present invention, and FIG.
Is a display screen in the MDI mode.

First, prior to the description of the present invention, the multi-sequence N
The actual operation of the C machine tool will be described.

Mechanical Structure The actual mechanical operation of the machine tool will be described with reference to FIGS. 1, 2A, 2B and 2C. Bed 1
Is a base that constitutes the main body, and is made of a casting, a steel material, or the like. A first headstock 2 is provided at one end on the bed 1. The inside of the first headstock 2 does not move on the bed 1. A first spindle 22 is rotatably supported in the first spindle stock 2. The first chuck 3 is integrally provided at the tip of the first main shaft 22. First chuck 3
Is for holding the work. First spindle 22
Are driven to rotate by a built-in type first spindle motor 4.

The first main shaft 22 is provided so that rotation index control can be performed. This rotation indexing control is realized by controlling the rotation of the first spindle motor 4, or by providing another indexing motor and controlling the rotation of the indexing motor. A second headstock 5 is provided on the bed 1 at a position facing the first headstock 2. The second headstock 5 is movably provided on the inclined guide surface on the bed 1.

The drive on the inclined guide surface is performed by the Z2 servo 6 via the feed screw. This direction of movement is referred to herein as the Z2 axis. A second spindle 23 is rotatably provided in the second spindle stock 5. A second chuck 8 is provided at the tip of the second spindle 23. Second spindle 23
Are driven to rotate by the second spindle motor 9. Bed 1
A first carriage that moves in a direction parallel to the axial direction of the first main shaft 22 is provided on the top.

A first cross slide that moves in the radial direction of the first main shaft 22 is provided on the first carriage.
A first tool rest 11 having a hexagonal turret is provided on the first cross slide. The first carriage is
The Z1 servomotor 10 feeds and drives the horizontal guide surface on the bed 1 in the direction of the axis (Z1) parallel to the first main shaft 22. The feed drive of the first carriage is performed by the Z1 servo motor 10
It is performed by the feed screw connected to.

Further, the cross slide is driven in the X1 axis direction, which is a direction perpendicular to the Z1 axis line, that is, in the radial direction of the work held by the first chuck 3. This drive is driven by the X1 servomotor 17 via a feed screw. The turret body has a hexagonal shape, and 12 tool mounting surfaces are formed on the outer periphery thereof. Therefore, the number of attached tools is usually twelve. A second turret 20 is provided on the bed 1 so as to face the first turret 11 and on the same horizontal guide surface.

The shape of the second turret 20 is the same as that of the first turret 11.
The description is omitted because it is substantially the same in the symmetrical structure and is substantially the same in the function except that the direction of the axis is different. However, the second turret 20 does not move in the main axis direction in this embodiment. The third tool post 30 is a tool post provided on the front surface of the bed 1. A vertical guide surface is formed on the front surface of the bed 1. On the vertical guideway,
A third carriage is movably provided. The third carriage is driven by the Z3 servo motor 33.

A feed screw 33a is directly connected to the output shaft of the Z3 servo motor 33, and the feed screw 33a drives the third carriage in a direction parallel to the axes of the first and second spindles. A third cross slide is provided on the X3 guide surface on the third carriage so as to be movable in the X3 axis direction on the X3 guide surface. The drive in the X3 direction is driven by the X3 servo motor 37 via a ball screw (not shown). A turret body is provided on the third cross slide.

On the outer circumference of the cylindrical third turret body, 6
Book tools are attached. The third turret 30 is the first
The purpose is to support machining of the turret 11 and the second turret 20. Concretely, machining sharing of inner and outer diameters, fault cutting of outer diameter machining (processing to outer diameter machining with two tools at the same time), support for threading, measurement support, bar material feeding device The processing support such as the role of the burst top.
On the front surface of the second headstock 5, an operation panel 40 of a numerical controller for controlling the first tool post 11, the second tool post 20, the third tool post 30, and the second headstock 5 is provided on the front surface. ing.

Control Sequence First, the shaft configuration will be described with reference to FIG. As is clear from the above description, the movement of the work in the radial direction is defined as the X axis and the movement in the axial direction is defined as the Z axis in accordance with the function and property of the shaft. When the second headstock 5 facing the first headstock 2 moves in the spindle axis direction, it is referred to as the Z2 axis. Based on these principles, the X and Z axes are
Z1, X2 for the second turret 20, X3 for the third turret 20
It is called Z3.

The first series and the second series of numerical control devices referred to below
The terms "series" and "third series" have the following meanings. The first series refers to machining of the first spindle 22 by the first turret 11,
The two axes X1 and Z1 of the first tool post 11 are controlled. Similarly, the second series refers to machining of the second main spindle 23 by the second turret 20, and the two axes X2 and Z2 are controlled. In the third series, the two axes X3 and Z3 of the third tool post 30 are controlled. However, the third turret 30
Of machining or the machining of the second spindle 23,
When assisting the machining of the second spindle 23, interpolation control is performed with the movement axis Z2 of the second spindle 23. That is, simultaneous interpolation control of three axes is performed.

Automatic Programming Device FIG. 4 is a functional block diagram showing an automatic programming device 101 for creating a program. CPU 102
Is a central processing unit for controlling and controlling the entire NC unit.
Each memory area is provided to the CPU 102 via the bus 103.
Each control circuit is connected. CRT (display device) 10
Reference numeral 4 is a well-known display device for displaying figures, characters, etc. on a screen, and is equipped with a keyboard (KB) 104a and can be manually operated.

The machining data display program section 105 stores and holds a control program for displaying a machining program, a tool locus, a description, and the like. The system program 106 is directly connected to the hardware and stores a control program used for loading a machine language program or controlling the program to be executed internally without loss.

The system parameter section 107 is preset with data such as tool initial settings. The data file 108 stores and holds various data regarding the machine body, tools, workpieces, and the like. The editing program 109 is a program that automatically creates a machining trajectory when inputting X-axis and Z-axis data. For example, Japanese Unexamined Patent Publication No. 2-216504 describes a method for automatically determining a machining area of cutting NC data.

The pseudo signal generating means 110 is means for generating a signal indicating the end of processing (program execution).
The actual operation time can be predicted from the motor rotation speed, the workpiece feed speed, etc., and the end signal is generated. In actual work, there is a control circuit for driving and controlling the servomotors of the first, second and third turrets 11, 20, 30 and the servomotor of the second headstock 5, and when the machining is completed, normally, a programmable
The end signal is output from the controller.

The NC machining program memory unit 111 stores and holds an NC machining program created for each tool post. This NC machining program includes a first series machining program 112 and a second series machining program 1.
13 and the third series machining program 114, each of which is stored and held.

[0025] Operation kinematic above, multilineage NC apparatus as described is consists of two major and three tool rests, executing each sequence plurality of machining programs simultaneously or selectively.

FIG. 5 shows an example in which each of the three series of information (positional information) is collectively displayed on one screen. The top left display is the first series,
The upper right display shows the second series, and the lower left display shows the third series.
The X-axis, Z-axis, C-axis (indicating the angle of the main axis) blade edge position of each series can be seen at a glance.

FIG. 6 is an example in which the respective information (memory information) of the three series is collectively displayed on one screen. Left screen is first
Series, the middle screen is the second series, and the right screen is the third series.

Description of the Present Invention FIGS . 7A and 7B are screens on the display device 104 of the interactive NC device.

The present invention will be described below with reference to FIG.
At the start of work (S1), FIG. 7 appears on the screen. The program check by the monitor is started (S2). Next, the mode without the actual machine is selected according to the parameters displayed on the screen (S3). This causes the pseudo signal generating means 110 to generate an end signal. Next, in the soft key part, "first series", "second series", "third series", "E"
"DT", "MEM", "MDI", "JOG", "QS"
"ET" is displayed (S4). Next, the required soft key is selected (S5), the program is executed (S6), and the program is checked.

When "first series" or "third series" is selected in step S5, FIG. 5 (the contents are described above) is displayed. In step S5, the "first series", "ME
When "M" is selected, FIG. 6 is displayed, and the first series program check can be performed. The check items are the blade edge position, the remaining movement amount, the machine position, the actual rotation speed, and the like.

When MDI (manual data input mode) is selected in step S5, the program shown in FIG. 9 is displayed. Current command value, cutting edge position, remaining movement amount, rotation limit,
Perform program check on machine position, zero set position, actual speed, etc.

[0032]

As described above in detail, according to the present invention, software can be checked in parallel with the manufacture of a machine when creating an NC machining program for a new model.

[Brief description of drawings]

FIG. 1 is a typical perspective view example of a machine tool (numerical control lathe).

FIG. 2 (a) is a plan view of FIG. 2 (b) is a front view of FIG. 1, and FIG. 2 (c) is a right side view of FIG.

FIG. 3 is a diagram showing names of axes.

FIG. 4 is a functional block diagram of an automatic programming device.

FIG. 5 is an example in which each information of three series (positional information) is collectively displayed on one screen.

FIG. 6 is an example in which information of three series (memory information) is collectively displayed on one screen.

7A and 7B are display screens of an interactive NC device.

FIG. 8 is a work flow of the present invention.

FIG. 9 is a display screen in MDI mode.

[Explanation of Codes] 104 ... CRT (display device), 105 ... Machining data display program section, 106 ... Machining data display program section,
107 ... System parameter section, 108 ... Data file section, 109 ... Editing program section, 110 ... Pseudo signal generating means, 111 ... NC machining program section

Claims (2)

[Claims] 1. A machining data display program section (105) for displaying a program, a system program section (106) for controlling automatic programming, a system parameter section (107) containing data such as tool initial settings, A data file section (108) that stores data related to the machine body, tools, workpieces, etc., an edit program section (109) that creates the machining trajectory of the workpiece by inputting position coordinates, and NC machining for NC machining. In an automatic programming device including a program section (111), a required software is selectively displayed on a display device (104), the NC machining program is executed, and instead of a programmable controller, an end signal for finishing the machining of each step. Is generated in a pseudo manner, and the N
A method for confirming the operation of a program in an NC machine tool, characterized in that the operation of the C machining program is confirmed. 2. A machining data display program section (105) for displaying a program, a system program section (106) for controlling automatic programming, a system parameter section (107) containing data such as tool initial settings, A data file section (108) that stores data related to the machine body, tools, workpieces, etc., an edit program section (109) that creates the machining trajectory of the workpiece by inputting position coordinates, and NC machining for NC machining. In an automatic programming device including a program section (111), required software is selectively displayed on a display device (104), the NC machining program is executed, and a pseudo signal generating means (1
A program operation confirmation device in an NC machine tool, characterized in that the operation confirmation of the NC machining program is performed without driving an actual machine by generating a machining end signal in each step according to 10).