JP3450065B2 - NC lathe - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a plurality of spindles, a plurality of turrets, and a control unit for controlling them, and there are a plurality of combinations of spindles and turrets that operate in association with each other. about the NC lathe which can perform simultaneous machining in the spindle.

[0002]

2. Description of the Related Art An NC (numerical control) lathe is designed to rotate a spindle according to a machining program and to move the spindle in a direction of a center line (Z).
Direction) and the movement of the tool post in the X and Y directions (two directions orthogonal to each other in the plane orthogonal to the Z direction),
A machine tool that processes a material (workpiece) held on a spindle by a tool (cutlery) attached to a tool post,
Recently, CNC lathes equipped with computers are becoming mainstream.

Further, the processing speed of such NC lathes has been increased, the efficiency of the processing process has been improved, the processing accuracy has been improved, and the functions have been expanded (general versatility), flexibility and safety have been improved. Measured and used in a wide range of component processing. There are single spindles for front machining, single spindles with two spindles, multiple spindles with multiple spindles, etc., in the axial layout of NC lathes. Some are equipped with a back spindle used for machining. The NC device provided with a plurality of spindles is also provided with a plurality of tool rests so that the respective spindles can be used exclusively or commonly by the plurality of spindles.

A machining program is required to machine a part with an NC lathe having a plurality of spindles and a tool post as described above, but conventionally, one machining program that is not divided into systems is created and displayed. Or, a machining program was created and displayed for each system configured by combining arbitrary spindles and turrets.

[0005] For example, a part program is a series of NC machining program created, it was done to be displayed in 3 divided into systematic tabular As shown in FIG. 2, each of the respective systems 1 to 3 In the display column, a machining program that uses the spindle 1, the spindle 2, and the back spindle as the spindle, and a machining program that uses the tool post 1, the tool post 2, and the back tool post as the tool post are mixedly displayed.

[0006]

However, in such a display function of the machining program in the conventional NC lathe, which spindle and which tool post are combined for machining (display during machining) It was difficult to understand at first glance if it was processed. Therefore, there is a problem that it is difficult to confirm the created machining program or the combination of the spindle and the tool rest during machining. Further, there is a problem that the time required for each process or for all processing processes cannot be known.

The present invention is applied to such a conventional NC lathe.
To resolve the definitive problem, put the control panel of the display
The purpose is to make it possible to see at a glance the spindle and tool post to be combined and machined by looking at the display of the machining program. It is also an object of the present invention to make it possible at a glance to know the required processing time for each processing step, the processing time for all steps, or the status of time distribution during processing.

[0008]

SUMMARY OF THE INVENTION The present invention has a control unit for controlling a plurality of main shaft and a plurality of tool rests thereof, associated combination of spindle and tool rest that operates There are a plurality of sets each other, the a NC lathe which can perform simultaneous machining in a plurality of main shaft, to achieve the above object, the upper Symbol control unit, supervising system overall control unit
And the system control section that Gosuru, and display, on each axis system
Corresponding process subprogram display data and process edit program
A display data storage unit for storing the program display data is provided.
Eteori, the system control unit, the display data storage
Process subprogram display data and work stored in the department
Extent by using the editing program display data, for each of the plurality of main shaft as shown in FIG. 1 (A), displays all of the tool rest capable on the screen of the display combination
P11, P1 for each combination of main spindle and tool post used in each process of the function to make and a series of NC machining programs
2, P21, P22, P23, P32, P33 and the function of displaying on the same screen of the display.
Have

Further, the system control section causes the display data to be displayed.
Process subprogram display data stored in the data storage section
Data and process edit program display data, a process sub-program that is a series of NC machining programs, which is a part program for each machining process, is used for each machining process , as shown in Fig. 1 (B). N1, N for each
2, N3 causes display on the screen of the display as
Features and, a function for displaying the part programs displayed screens the display <br/> process subprogram per the spindle of as every tool rest P1, P2, P3 used in each machining You may have. In that case, the system control unit further
When any of the plurality of process sub-programs are displayed for each of the spindle is indicated on the screen, the part program constituting the instructed process subprogram corresponding to the tool rest used in the processing on the screen It is good to have a function to display in a window.

Further, the system control unit is arranged to execute a series of N
The program number of C machining program step subprogram the part program are summarized for each processing step is, the display of the image for each spindle used in each processing step
A function of displaying the surface, the machine to display a processing time by the respective steps subprogram on the same screen of the display
You may have the ability . Further, the system control unit arranges the program numbers of the process subprograms in the order of execution for each spindle used in each machining process, and then executes the above-mentioned process.
A function for displaying on the screen of Isupurei, the de-accumulation processing time when sequentially executing the respective steps subprogram
It can also have the function of displaying on the same screen of the spray . And the function to display the cumulative added time is
It may be a function of displaying the cumulative addition time by a graph showing the ratio of the processing time by each process subprogram.

[0011]

SUMMARY OF] According to the NC lathe according to the invention, for each of a plurality of main shaft, all of the tool rest capable combination de
It is displayed on the display screen and a series of NC machining programs are displayed separately for each combination of spindle and turret used in each process, so you can check at a glance the combination of spindle and turret in each machining process. can do.

Further, a process sub-program in which a part program which is a series of NC machining programs is collected for each machining process is displayed for each spindle used in each machining process.
The combination of the spindle and the tool post in the process sub-program that you want to check, even if you display it on the screen of b) and display the part program showing the contents on the same screen for each tool post used in each machining by window display etc. You can check at a glance.

Further, the program number of the process subprogram is displayed for each spindle used in each machining process.
By displaying it on the screen of the ray and displaying the machining time by each process subprogram on the same screen, the time required for machining for each process can be seen at a glance. and again,
If the program numbers of the process subprograms are arranged in the order of execution and displayed on the screen of the display, and the cumulative machining time when each process subprogram is sequentially executed is displayed on the same screen, the time required for all machining and machining You can know the time allocation inside. If the cumulative added time is displayed as a graph showing the ratio of the processing time by each process subprogram, the time distribution can be seen at a glance.

[0014]

EXAMPLES Examples of the present invention will be specifically described below. Figure 3 is an external perspective view showing an example of an NC lathe according to the present invention.

This is an NC lathe of a headstock sliding type for machining a bar material, and has two main spindles and one back spindle. That is, as shown in FIG. 3, the first headstock 11A and the second headstock (not shown) are provided in the rear portion of the upper surface of the bed 10 in the Z-axis direction (arrows Z1, Z2 directions) parallel to the center line of the spindle. The first headstock 11A and the second headstock are slidably mounted along a guide rail (not shown), and a feed screw (not shown) is provided by a Z1 axis servomotor and a Z2 axis servomotor, respectively. They are moved independently of each other through the mechanism in the directions of arrows Z1 and Z2.

A first spindle which is rotatably supported by the first spindle stock 11A and the second spindle stock and is independently rotated by the first spindle spindle motor 12A and the second spindle spindle motor (not shown). A center line (only the center line is indicated by A) and a second main axis (only the center line is indicated by B) are provided in parallel with each other with a predetermined distance.

A tool rest base 13 is fixed to the bed 10 in front of the first spindle and the second spindle, and stands upright over the entire width thereof. The turret base 13 has a first position at a position concentric with each center line of the first spindle and the second spindle described above.
The guide bush 14A and the second guide bush 14B are arranged, and the works 15A and 15B gripped by the first main spindle and the second main spindle, respectively, slide in the Z-axis direction by the first and second guide bushes 14A and 14B. Be movably guided.

The tool rest base 13 is further provided on both sides (upper side in FIG. 3) of a line (hereinafter referred to as a "reference straight line") L intersecting with each of the center lines A and B of the first spindle and the second spindle. And a lower side), a first turret 17A and a second turret 17B are provided, respectively. This first and second turret 17
A and 17B are guide rails 16 formed on the front surface of the tool post base 13 over the entire width thereof in parallel with the reference straight line L.
A Y-axis table 18 that is fitted to A and 16B and slides in the Y-axis direction parallel to the reference straight line L (directions Y1 and Y2 shown by arrows).
It is mounted on X-axis tables 19A and 19B which are provided on A and 18B and which slide in the X-axis direction (the X1 and X2 directions shown by the arrows) orthogonal to both the Y-axis and the Z-axis described above.

The Y-axis table 18A is attached to the tool rest base 13 by the Y1 axis servo motor 20A in the direction of the arrow Y1, and the Y-axis table 18B is attached to the tool rest base 13 for the Y2 axis servo motor 20B.
Is driven along the guide rails 16A and 16B by the feed screw mechanism in the Y2 direction indicated by the arrow, and can reciprocate over substantially the entire length thereof.

The X-axis table 19A is the Y-axis table 18A.
X1 axis servo motor 21A attached to the Y axis table 18A in the X1 direction, and X axis table 19B is attached to the Y axis table 18B by the X2 axis servo motor 21B attached to the Y axis table 18B. In each direction, each is driven by a feed screw mechanism, and can reciprocate by a predetermined stroke.

Each of the first and second turrets 17A, 17B has a plurality of (four in the illustrated example) tools 22A,
, 22B, ... Are attached in a comb-teeth shape at predetermined intervals in the Y-axis direction. In the illustrated example, the tools 22A,
, 22B, ... are all cases where they are outer diameter cutting tools such as cutting tools.

Further, a rear tool post 23 is fixedly provided at an extension position of the reference line L at the right end portion of the tool post base 13 in FIG. 3, and a plurality (three in the illustrated example) of back tool posts 23 are fixed to the rear tool post 23.
Are arranged so that their centers are lined up at predetermined intervals on the extension line of the reference line L. This tool 24, ...
Is a tool for back surface processing, for example, a relative rotating tool such as a drill or an end mill, and can be processed even if the tools 24, ... Are not necessarily rotated, if a work chucked by a back surface spindle described later rotates.

On the front side of the tool rest base 13 of the bed 10, a groove 10a is formed over the entire width in the Y-axis direction. The groove 10a is parallel to the reference line L on the upper surface of the step on the front side of the groove 10a. Forming a guide rail 25 extending in the direction,
A rear headstock base 26 is slidably fitted to the guide rail 25, and a rear headstock 27 can be slid on the guide rail 25 in the Z3 direction indicated by the arrow parallel to the centerline of the rear main spindle provided therein. It is provided in. The direction of the arrow Z3 is parallel to the directions of the arrows Z1 and Z2, which are the moving directions of the first and second headstocks described above.

The rear headstock base 26 is moved by the Y3 axis servomotor 28 mounted on the bed 10 in the Y3 direction (direction orthogonal to the Z3 direction in the horizontal plane) through a feed screw mechanism (not shown). Driven and bed 10
It is reciprocally movable over substantially the entire width of. Rear headstock 27
Is driven by a Z3 axis servomotor 29 attached to the rear headstock base 26 via a feed screw mechanism (not shown), and is capable of reciprocating a predetermined stroke in the Z3 direction with respect to the rear headstock base 26.

The back spindle provided inside the back spindle 27 has its center line at the height of the reference line L, and has a chuck for gripping a work piece at its tip, and a spindle motor 30 for the back spindle. Is rotated by. The work held on the back spindle is mainly the back tool post 2 described above.
It is processed by the tools 24, ... Attached to No. 3, but when a tool for back surface processing is attached to the first turret 17A or the second turret 17B, it is also possible to process them.

Further, on the side surface on the left side in FIG. 3 of the rear headstock 27, an opposed tool rest 31 is fixedly installed, and a plurality of (three in the illustrated example) tools 32, ... It is attached so as to be lined up at a predetermined interval in the arrow Y3 direction at the same height as. These tools 32, ... Are also relative rotary tools such as drills and end mills, and can perform drilling, thread cutting, etc. on the front end face of the rotating work held by the first or second spindle. Is.

Here, the minimum necessary configuration of this NC lathe is the first, which is provided in parallel with each other and separated by a predetermined distance.
Main spindle and second spindle (provided on the rear side of the turret base 13 and their center lines A and B), and a first turret 17A and a second turret which can be machined in combination with the first spindle and the second spindle, respectively. The table 17B is arranged so as to face the first main spindle and the second main spindle, and the direction connecting the axes of both main spindles (Y3 direction indicated by the arrow) and the direction approaching / separating from the both main spindles (Z3 direction indicated by the arrow). ) Is provided with a back spindle (provided in the back spindle stock 27) and a back tool post 23 that can be machined in combination with the back spindle.

A process for processing a workpiece (part) having a shape shown in FIG. 4 from a material of a round bar by using this NC lathe will be described. An example of the tool layout of the first and second turrets 17A and 17B, the back turret 23, and the opposed turret 31 in this case is shown in FIG.
Work W shown in FIG. 4 (work 15A, 1 shown in FIG. 3
The tool used for machining (corresponding to 5B) is shaded, and each tool is marked with 1 to 12 (circled numbers in the figure).

The name of each tool is as follows. 1: Center drill, 2: Drill, 3: Pre-grinding bite, 4: Screw cutting bite, 5: Pre-grinding bite, 6: Grooving bite, 7: End mill, 8: Post-grinding bite, 9: Cut-off bite, 1
0: Rear center drill, 11: Rear drill, 12: Rear tap

In advance, the round bar material is passed through the first and second main spindles of the NC lathe shown in FIG. 3 to be guided by the first guide bush 14A and the second guide bush 14B and slightly projected. Then, the first spindle side having the first guide bush 14A and the second guide bush 14B perform the simultaneous machining by shifting the machining process by a half cycle.

The machining process will be described for the work on the first spindle side. First, the opposed tool rest 31 is placed at the center of the front end surface of the round bar (workpiece W) that is chucked by the first spindle and projects from the first guide bush 14A. The rear headstock 27 is moved so that the center drill 1 faces it, and the first spindle is rotated by the spindle motor 12A for the first spindle to rotate the work W.
While rotating the first headstock 11A or rear headstock 2
7 is moved in the Z-axis direction to form a central hole in the front end surface of the work W. Then, the drill 2 of the opposed tool post 31 is used to perform the same operation as described above to form a hole having a predetermined inner diameter and depth at the front end of the work W.

After that, the first tool rest 17A is moved so that the front grinding tool 3 is located on the center line A of the first spindle,
The workpiece W is lowered in the X1 direction to machine the outer circumference of the threaded portion of the work W into a predetermined diameter and length. And the first turret 17A
Using the thread cutting tool 4 of, cut the screw on the outer circumference.

Next, after the large diameter portion of the work W is machined to a predetermined diameter by using the pre-grinding bite 5 (same as 3) of the first turret 17A, the first turret 17A is moved to the second spindle side. , Second
Move the turret 17B to the first spindle side to move the spindle and turret
Switch the combination . Then, using the grooving tool 6 of the second turret 17B, a groove of a predetermined depth is cut in the rear part of the large diameter part of the work W, and then the work W is fixed and the end mill 7 is used. Is moved back and forth in the direction of the arrow X1 to form a plane portion parallel to the opposing position on the outer periphery of the large diameter portion behind the groove of the work W. Then, the work W is rotated again, using the post-grinding bite 8 of the second turret 17B,
The rear small-diameter portion is machined to a predetermined diameter.

After that, the rear spindle headstock 27 is moved in the Z3 direction shown by the arrow, the front end portion of the work W is gripped and held by the chuck of the rear spindle, and the second tool rest 1 is cut by using the cut-off tool 9.
Line processing parting and 7B is reciprocated in the arrow X1 direction
Separate the work W from the round bar. The delivery of the work W is called pickoff.

Then, the rear headstock 27 is replaced with the rear tool rest 23.
And the back spindle is rotated, and the back center drill 10 is used to form a center hole in the back surface (rear end surface) of the work W. Further, the back drill 11 is used to open a hole having a predetermined inner diameter and a predetermined depth, and the back tap 12 is used to cut a tap on the inner periphery of the hole.

The same work as that on the first spindle side is processed by the second
Also on the spindle side, as described with reference to FIG. 1, it is started with a half cycle delay, and the machining on the back spindle side is started after the completion of all the first steps on the first spindle side. After that, each time the machining of the work is completed on the first spindle side and the second spindle side, the work is received on the back spindle side and the back machining is alternately performed within a half cycle of all the steps on the spindle side.

FIG. 7 shows the relationship between the use order of the above-mentioned tools on each axis side and the time required for each machining after the second cycle according to this embodiment. In this figure, $ 1 indicates the machining on the first spindle side, $ 2 indicates the machining on the second spindle side, $ 3 indicates the machining on the rear spindle side, and the circled numbers are the same as the symbols of the tools used in FIGS. 4 and 5. , "Pick off" at $ 3 is a step of gripping and receiving on the rear spindle side a workpiece that is cut off on the first spindle side or the second spindle side. The vertical axis represents time (seconds), and the vertical length of each shaded frame is proportional to the machining time of each tool (indicated by a circled number in the frame).

As described above, in this embodiment, the time required for the machining process (including the pick-off process) on the back spindle side is less than half the time required for the machining process on the first and second spindle sides. The closer to half, the less the waiting time, so it is more efficient. If it exceeds half, waiting time will occur on the spindle side, but if it is a little longer, there is no problem in practical use. In order to shift the machining steps on the first spindle side and the second spindle side by half a cycle, if all the steps are divided so that the first half and the latter half are just 1/2 (1: 1) as in this embodiment. It is ideal, but if it is divided into about half, there will be no waiting time even if there is some difference, but there will be no problem.

FIG. 6 shows an example of another tool layout <br/> for performing machining of the workpiece shown in FIG. Rear turret 23
The tools 10 to 12 for back surface processing are attached to the same as in the example of FIG. 5, but the illustration thereof is omitted. In this example, the opposed turret 31 is not used, and all the tools 1 to 9 necessary for machining on the first and second spindle sides are attached to the first turret 17A and the second turret 17B, respectively, The center drill 1 and the drill 2 are attached via a tool holder 33 in a direction orthogonal to the paper surface and facing the front end surface of the work W. Therefore, according to this tool layout,
Since it is not necessary to replace the first tool post 17A and the second tool post 17B during the machining process on the first spindle side and the second spindle side, it is possible to shorten the machining time accordingly.

Next, the structure of the control unit of the NC lathe shown in FIG. 3 will be described with reference to the block diagram of FIG. This control unit includes a system control unit 40 including a CPU, a program input unit 41, a keyboard 42a and a switch 42.
b, an operation panel 44 having a display 43, an input / output control unit 45 thereof, a system control program memory (RO
M) 46, automatic programming unit 47, machining program memory 48, display data storage unit 49, RAM 50 for storing other data, machining program processing unit 51, communication control unit 52, machining operation control unit 53, and machining thereof. The drive unit 60 that directly controls the drive of the mechanical unit shown in FIG. 3 is controlled via the operation control unit 53.

The drive unit 60 is a servo motor (20A, 20B, 21A, 21B, 28, 29) for each axis shown in FIG.
Etc.), a control drive unit 62 for each axis for driving and controlling a servo mechanism 61 for each axis motor, a spindle motor (12) for each spindle.
A, 30 etc.) 63 and a spindle motor control drive section 64 for driving and controlling, and a sensor input section 66 etc. for inputting detection signals of each sensor (rotation speed sensor of each spindle motor, position sensor of each table, etc.) 65. .

The system control unit 40 is a unit for integrally controlling the entire control unit, and thus the entire NC lathe, and together with the automatic programming unit 47, a machining program creating process according to the present invention and a machining program created together with the machining program processing unit 51. System discrimination, conversion, division, editing, etc., input of data and commands from the keyboard 42a or switch 42b of the operation panel 44 via the input / output control unit 45 , and processing programs on the display 43
The NC unit is operated by operating the drive unit 60 based on the processing program stored in the processing program memory 48 together with the processing related to various displays described later and the processing operation control unit 53.
Performs the processing to perform .

The program input unit 41 is a paper tape reader, a floppy disk device (FDD) or the like for inputting a processing program created by an external program creating device (personal computer or the like) from a paper tape or a floppy disk. The operation panel 44 is a keyboard 4 when performing NC processing.
2a or the switch 42b provides an operation command, and the operation on the display 43 confirms the operation. Further, when the machining program necessary for the NC lathe itself is created by using the function of the automatic programming section 47, it serves as an interactive input means for performing interactive automatic programming.

The input / output control unit 45 determines the commands and inputs from the keyboard 42a or the switch 42b of the operation panel 44, controls for displaying the display data stored in the display data storage unit 49 on the display 43, and the like. To do .
The system control program memory 46 is a CP of the system control unit 40 for controlling the operation of this control unit.
RO that stores the program and fixed data used by U
It is M.

The automatic programming section 47 includes a control panel 44.
Along with this, it is a functional unit that creates a machining program according to the present invention, and is actually a function of the system control unit 40, but is shown as a separate block for the sake of clarity. The machining program memory 48 includes a machining program storage unit 48a for storing a part program and a process sub-program described later, and a process editing program storage unit 4 for storing a process editing program created by the method according to the present invention.
8b and a backup program storage section 48c for storing a backup program used when a trouble occurs
And the like.

The display data storage unit 49 is a system control unit.
40 will be described later on the screen of the display 43 of the operation panel 44 .
It is a memory (RAM) for storing various data for performing various displays, and also stores the process sub program display data and the process edit program display data corresponding to each axis system according to the present invention. The RAM 50 is a memory that stores data of each tool (tool) used for machining, various initial set data, and the like. The machining program memory 48 and the display data storage unit 49 are also the RAM 50.
If the storage capacity of is sufficient, this can also be used.

The machining program processing unit 51 performs system discrimination, conversion, division, editing, etc. of the created machining program.
This is a functional unit that performs , and this is also actually the system control unit 40.
Is a function of. The communication control unit 52 is a circuit that controls communication with an external system such as a DNC device, transfers the created machining program to the external system and stores it in the storage medium, or takes in the machining program from the external system. To be used when

Now, a method for creating a machining program according to this embodiment will be described. Creating a machining program
As described above, it is created in an interactive manner with the operator by the system control unit 40, the automatic programming unit 47, and the operation panel 44 of the control unit shown in FIG. The creation procedure in that case is shown in the flowchart of FIG. FIG. 10 shows an example of the created part program and its process subprogram, and FIG. 11 shows an example of the process edit program.

According to the flow chart of FIG. 9,
Explaining the machining program creation procedure, first, create a part program that is a normal NC machining program,
It is stored in the machining program storage unit 48a of the machining program memory 48 shown in FIG. This part program is created by an external device, loaded from the program input unit 41 or the communication control unit 52, and the machining program storage unit 4 is loaded.
It can also be stored in 8a.

This part program is shown in FIG.
As shown in (A), it is a series of programs in which a program for each process required for machining one target part is described in the work order without considering which spindle side is to be executed. Here, a code consisting of N such as N0010 and N0020 and a 4-digit number is a program number for each process. G
Codes with numbers after G such as 00 and G50 indicate command contents of the preparation function (G function), G00 is fast-forward,
G50 indicates an offset position.

[0051] M03, encoding the auxiliary function given the number after the M as M06 (G function), i.e. including performing ON / OFF of such non-servo motor motor actually command the contents of the function of performing some operation Then, M03 commands the clockwise rotation of the spindle and M06 commands the tool replacement. S520
A code consisting of S and a four-digit number such as 0 is a code of the S function for selecting the rotation speed of the spindle, and S5200 is a command to set the rotation speed of the spindle to 5200 rpm.

Numerical values with decimal points after X, Y and Z are
It indicates the moving distance in each of the X, Y, and Z directions, and the positive / negative of the numerical value indicates the positive in the moving direction. The number after F commands the feed rate. The code with T and the number after it indicates a tool selection command. This part program is summarized as a process subprogram for each machining process (for each program number such as N0010, N0020) as shown in FIG.

Then, the machining time for each process subprogram is calculated. The machining time can be calculated from the feed speed and feed distance of the work or tool described in the process subprogram and the initial data stored in advance. Before calculating the machining time for each process subprogram, , The first turret 17A and the second turret 17B
Conducted a tool layout to determine the type of tool to be attached to the
By doing so, it is possible to calculate the machining time in consideration of the time required for actual tool replacement.

The calculated machining time for each process subprogram and the accumulated machining time can be displayed on the display 43 of the operation panel 44. An example of the display will be described later. After that, it is judged whether or not the machining time on the main spindle side and the rear spindle side of the whole process subprogram can be divided into about 2: 1. This may be automatically judged by the system control unit 40, but the operator can also input the result of judgment made by looking at the accumulated machining time displayed on the display 43.

In the case of being divided, the machining time for the main process side and the back process main shaft side for the entire process subprogram is about 2: 1.
So that the process editing program is created by dividing into a main spindle system and a back spindle system. Further, it is determined whether or not the process edit program of the spindle system can be divided in process sub-program units at about half of the total machining time. This judgment is made automatically or by interactive input as in the above judgment.

When the process is divided, the process edit program of the spindle system is divided into the first half and the latter half so that the machining time is approximately 1: 1, and the latter half and the first half are copied in that order to another spindle system. The process edit program of 3 is created, and the process edit programs of these three systems are stored in the process edit program storage section 48b of the machining program memory 48 as the machining programs on each axis side.

FIG. 11 shows an example of the result of creating the process editing program. Here, the spindle systems 1, 2, and 3 are a first spindle system, a second spindle system, and a back spindle system, respectively. The broken lines in each system indicate the dividing lines in the first half and the latter half, and in the spindle system 1 and the spindle system 2, the process subprograms in the first half and the latter half are interchanged. In the main spindle system 3 (back spindle system), the first half and the latter half are configured by the same process subprogram.

In this example, each process sub-program that constitutes the process edit program has a program number (N001
0, N0020, etc., the program number and the tool code (T1200, T1300) used in the process.
Etc.) and are stored as a pair. Note that M02 is a command indicating the end of the machining program. This process editing program can be displayed on the display 43 for confirmation.

In this way, a program system is provided for each of the first spindle, the second spindle, and the back spindle, and the process subprograms for the above-mentioned spindle-side processes are provided in the first half and the latter half of the program system for the first spindle, respectively. In the second spindle program system, the process subprograms of the spindle side process are arranged in the order of the latter half and the first half, and in the program system of the rear spindle side, the process subprograms of the above-mentioned rear spindle side process are arranged in the respective process order to form machining programs To do.

In the embodiment shown in FIG. 9, further, when the process subprogram of the spindle side process cannot be divided into process subprogram units so that the machining time on the spindle side and the back side becomes 2: 1, and the spindle system when the process editing program is not divided in about half of the processing time, a step subprogram reedited, and a step subprogram spanning around the place to be divided Part 2 divided by a separate process subprogram, then again performs the process of the subsequent calculation of the processing time of step subprogram units, and creates a process editing program.

By doing so, the process subprograms that are close to ideal can be distributed to each system, and the processing efficiency can be maximized.
Using the process editing program of FIG. 11 as a parent program,
Part programs or process subprograms of 0 can be viewed as child programs. As a result, the two thoughts of the details of the tool path and the overall arrangement of the steps can be disassembled and the operations can be organized.

Basically, a child program is considered as a single-system program which determines the operation by X and Z on a plane, and a parent program is considered as a program in which the order of processes and the queuing relationship between processes are developed in multiple systems. When editing or executing, you can understand the whole situation by looking at only the parent program, but it is difficult to understand the individual operations. Therefore, by specifying the program number (N0010, N0020, etc.) if necessary while the parent program is displayed,
The child program (process subprogram) can be displayed in a window.

FIG. 12 shows a machining program display example of a single layer structure for each spindle system according to this embodiment. By displaying a part program (child program) in a tabular format for each spindle system and scrolling vertically. The entire child program can be displayed. This makes it possible to confirm the details of the part program for each spindle system. Here, to display all the tool rest to be used for each spindle system, in that each display field, if to display the corresponding process part program, the processing according to the invention shown in FIG. 1 (B) This is a program display example.

FIG. 13 shows an example in which the cumulative machining time when the machining program of each spindle system shown in FIG. 12 is executed is displayed as a graph showing the ratio of machining time by each process subprogram (N ***). FIG. The vertical length of the shaded area in which the number of each process subprogram is displayed is proportional to the machining time of the process.

In the spindle system 1, the process subprogram N00
10 to N0030 are the first half, and N0040 to N0070 are the second half, and in the spindle system 2, the first half and the latter half are merely interchanged. The machining time of all the process subprograms of the spindle system 3 (rear spindle system) is slightly shorter than half the machining time of all the process subprograms of the spindle systems 1 and 2, and the machining time of the spindle systems 1 and 2 is once, respectively. line processing
It can be seen that do the same work twice during cormorants.

FIG. 14 is a diagram showing a machining program display example of a two-layer structure for each spindle system according to this embodiment. In this case, the process edit program (parent program) is tabulated for each spindle system and the program number (N ***) of each process subprogram and the tool number (T
***) and specify any of the program numbers of the process subprograms that compose it with the cursor, the child program (part program showing the contents of the process subprogram) will be displayed in the display column of the spindle system. A window is displayed at the bottom.

In FIG. 14, the designated program number is surrounded by a frame and shaded, but it is actually preferable to display in black and white inversion. In this example, the spindle system 1 has N
Each child program of N0010 in the spindle system 2 and N0080 in the spindle system 3 is displayed in each window of each system display column. The window for each system can be made to correspond to the tool rest mainly used in each system, thereby providing a machining program display example according to the present invention shown in FIG. 1 (B).

FIG. 15 also shows a different display example. In this example, the spindle system 1 has a program number N0010.
The child program and displays in the own column window, display the child program in the program number N0200 for simultaneous processing in a window in the display column of the main shaft line 2 using a second tool rest of the tool (T2600) is doing. In this way, the child programs of a plurality of process subprograms of the same spindle system can be displayed simultaneously by using the windows of other spindle systems. In this case, it is easy to understand that the windows that display the child programs of the same spindle system are of the same system by using the same type of frame or the same display color in the case of a display capable of color display.

Further, in the display of FIGS. 14 and 15, the child program of the program number designated by the cursor on the parent program is displayed in the window at the time of editing, but when it is displayed during machining, it is being executed (execution pointer). Located)
Child programs of the process sub-program of are sequentially displayed in the window.

FIG. 16 is a diagram showing a display example of the machining time for each process sub-program before creating the spindle system 2 of the process editing program according to this embodiment. This is displayed by touching and specifying "process edit" of the selection keys displayed at the bottom of the display screen and then touching "hour display" once. That is, in the time display window provided in the display column for each spindle system, each program number is displayed in units of seconds. As a result, the processing time calculated for each process subprogram can be known.

When the "hour display" key is touched again, the cumulative machining time by machining of each process subprogram for each spindle system is displayed as shown in FIG. Displayed in the display window. With this, it is possible to easily determine which process sub-program should be divided in order to divide all the processes in approximately half the processing time.

FIG. 18 is a diagram showing a display example of accumulated machining time for each spindle system after the process editing program for each spindle system is created. Here, when the "hour display" key is touched again, the cumulative machining time when the machining program of each spindle system is executed is displayed as a graph showing the ratio of machining time by each process sub-program as shown in FIG. Then, it is displayed in the time display window provided in the display column for each spindle system.

Here, the machining program display function of the NC lathe of the present invention is displayed by the conventional NC lathe.
It will be further described in comparison with the function . For example, as shown in FIG. 19, in an NC lathe that can perform processing by arbitrarily combining a spindle A, a back spindle B, and a tool rest C and a tool rest D, a machining program display function by a conventional NC lathe <br / >, Then, as shown in FIG.
Even when the display is divided into 1, $ 2 and $ 3, machining programs by different combinations of the spindle and the tool post are displayed in a mixed manner in the display column of each system. Circled A in the figure
The combination of D means the display of a machining program (process subprogram) by the combination of the shaft and the tool rest .

On the other hand, according to the machining program display function of the NC lathe according to the present invention, as shown in FIG. 21, the blades used for each spindle A and B system and in each spindle system. The tables C and D and the spindle B alone which does not use the tool post are also separately displayed, and machining programs (program number of the process sub-program or part program) by the corresponding combination are displayed in each display column.

FIG. 22 shows the positions of the respective spindles of an NC lathe similar to the NC lathe shown in FIG. 3 with circled numbers, and the positions of the first turret and the second turret are circled C and D. Then, the tool of the back tool post (three axes of the back surface) is shown by three small X marks, and the tool of the opposed tool post that moves together with the back headstock is shown by three small circle marks. First turret C and second turret D
The rear spindle and the opposed turret can be largely moved in the left-right direction (Y direction in FIG. 3) in the figure. As a result, various combinations with the respective spindles are possible, as indicated by the numerals of the numbers surrounded by the squares.

The machining program according to the present invention in this case is displayed as shown in FIG.
And its combination for each turret that can be used in each system
The machining program by the process (process unit program number or its part program) is displayed in the circled display field.

[0077]

As described above , according to the NC lathe according to the present invention, all the turrets that can be combined with each other for a plurality of spindles are displayed on the screen of the display , and a series of turrets are displayed thereon. since displaying separately NC machining program for each combination spindle and the tool rest to be used in the respective steps can be confirmed at a glance combination of spindle and tool rest in each processing step. In addition, the machining time for each process and the cumulative machining time for all processes are displayed.
Can be displayed on the same screen, and it is convenient to be able to know the time required for each process and all processing and the time distribution during processing.

[Brief description of drawings]

FIG. 1 is a machining program by an NC lathe according to the present invention.
It is a figure which shows the basic display example of.

FIG. 2 is a diagram showing a display example of a machining program by a conventional NC lathe.

FIG. 3 is an external perspective view showing an embodiment of an NC lathe according to the present invention.

FIG. 4 is an explanatory diagram of an example of a work (part) to be machined using the NC lathe shown in FIG. 3 and its machining process.

5 is a diagram showing an example of a tool layout for each tool rest for performing the machining shown in FIG.

FIG. 6 is a diagram showing an example of a tool layout when the machining shown in FIG. 4 is performed using only the first and second tool rests.

FIG. 7 is a diagram showing a relationship of machining time by each tool on each axis side when the machining shown in FIG. 4 is performed by the NC lathe according to the present invention.

8 is a block diagram showing a configuration of a control unit of the NC lathe shown in FIG.

9 is a flowchart showing a machining program creation procedure by the control unit of FIG.

FIG. 10 is a diagram showing an example of a part program and its process subprogram created by this embodiment.

FIG. 11 is a diagram showing an example of a process editing program created by this embodiment.

FIG. 12 is a diagram showing a machining program display example of a one-layer structure for each spindle system according to this embodiment.

13 is a diagram showing an example in which a cumulative machining time when the machining program of each spindle system in FIG. 12 is executed is displayed in a graph showing a ratio of machining time by each process subprogram.

FIG. 14 is a view showing a machining program display example of a two-layer structure for each spindle system according to this embodiment.

FIG. 15 is a diagram showing another different display example.

FIG. 16 is a diagram showing a display example of machining time for each process sub-program before creating the spindle system 2 of the process editing program according to this embodiment.

FIG. 17 is a diagram showing a display example of the cumulative machining time.

FIG. 18 is a diagram showing a display example of accumulated machining time for each spindle system after the process editing program for each spindle system is created.

FIG. 19 shows N for explaining a display example of a machining program.
It is a schematic diagram of a C lathe.

20 is a diagram showing a conventional display example of a machining program by the NC lathe shown in FIG.

FIG. 21 is a diagram showing a display example of a machining program according to the display method of the present invention.

FIG. 22 is a schematic view showing various combinations of a plurality of spindles and a plurality of tool rests of an NC device for explaining another example of displaying a machining program by the NC lathe according to the present invention.

FIG. 23: This invention for each combination shown in FIG.
It is a figure which shows the other processing program display example by NC lathe of this.

[Explanation of symbols]

W: Work (part to be processed) 10: Bed 1
0a: Groove 11A: 1st spindle stock 12A: 1st spindle spindle motor 13: Turret base 14A: 1st guide bush 14B: 2nd guide bush 15A, 15B: Work 16A, 16B, 25: Guide rail 17A: 1st 1
Turret 17B: Second turret 18A, 18B: Y-axis table 19A, 19B: X-axis table 20A: Y1-axis servo motor 20B: Y2-axis servo motor 21A: X1-axis servo motor 21B: X2-axis servo motor 22A, 22B, 2
4, 32: Tool 23: Rear tool post 26: Rear headstock base 2
7: Rear spindle 28: Y3 axis servo motor 29: Z3 axis servo motor 30: Rear spindle spindle motor 31: Opposed tool rest 32: Tool holder 40: System controller 41:
Program input section 42a: Keyboard 42b: Switch 43: Display 44: Operation panel 45: Input / output control section 46: System control program memory (ROM) 47: Automatic programming section 48: Machining program memory 49: Display data storage section 50: RAM 51: Machining program processing unit 52: Communication control unit 53: Machining operation control unit 60: Driving unit 61: Servo mechanism of each axis motor 62: Control driving unit of each axis 63: Spindle motor 64 of each spindle: Spindle motor control Drive unit 65: Each sensor 66: Sensor input unit

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-5-53635 (JP, A) JP-A-6-214629 (JP, A) JP-A 59-152042 (JP, A) JP-A 61- 184609 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B23Q 15/00-15/28 G05B 19/18-19/46 B23B 3/30

Claims (6)

(57) [Claims] 1. A plurality of spindles, a plurality of turrets, and a control unit for them.
Has Gosuru control unit, there are a plurality of sets are combined spindle and the tool rest which operate in conjunction with each other, a NC lathe which can perform simultaneous machining in said plurality of spindle, said control unit, said Controls the entire control unit
Compatible with system control unit, display, and each axis system
Process subprogram display data and process edit program
A display data storage unit that stores the display data , and the system control unit stores the display data storage unit in the display data storage unit.
Process subprogram display data and process editing program
Using Gram display data, for each of the plurality of main shaft, all of the tool rest capable combination the Disupu
A function of displaying the ray screen, a function to be displayed on the same screen of the display is divided a set of NC machining program for each combination spindle and the tool rest to be used in the respective steps
An NC lathe characterized by having . 2. A plurality of spindles, a plurality of turrets, and a control unit for them.
Has Gosuru control unit, there are a plurality of sets are combined spindle and the tool rest which operate in conjunction with each other, a NC lathe which can perform simultaneous machining in said plurality of spindle, said control unit, said Controls the entire control unit
Compatible with system control unit, display, and each axis system
Process subprogram display data and process edit program
A display data storage unit that stores the display data , and the system control unit stores the display data storage unit in the display data storage unit.
Process subprogram display data and process editing program
Using Gram display data, a series of NC machining program step subprogram the part program are summarized for each processing step is, before each spindle used in each processing step
And a function to be displayed on the screen of the serial display, for each tool rest use the part program in each of the processing, the di
Display the process subprogram for each main axis of the spray
It has a function to display on the screen
NC lathe . 3. The NC lathe according to claim 2 , wherein:
The system controller is al, when any of the plurality of process sub-program is displayed before each <br/> Symbol spindle on the screen of the display is instructed, the part constituting the instructed process subprogram the program causes the display in the window corresponding to the tool rest used in the processing on the screen
NC lathe, characterized in that the organic functions. 4. A plurality of spindles, a plurality of turrets, and a control for them.
Has Gosuru control unit, there are a plurality of sets are combined spindle and the tool rest which operate in conjunction with each other, a NC lathe which can perform simultaneous machining in said plurality of spindle, said control unit, said Controls the entire control unit
Compatible with system control unit, display, and each axis system
Process subprogram display data and process edit program
A display data storage unit that stores the display data , and the system control unit stores the display data storage unit in the display data storage unit.
Process subprogram display data and process editing program
A machine that uses the gram display data to display the program number of a process subprogram, which is a series of NC machining programs for each machining process, on the screen of the display for each spindle used in each machining process.
And ability, the processing time by the respective steps subprogram 該De
Program number of the process sub-program of the display
Machining program display method of the NC lathe, which comprises organic and a function of displaying on the screen displaying the. 5. A plurality of spindles, a plurality of turrets, and a control unit for them.
Has Gosuru control unit, there are a plurality of sets are combined spindle and the tool rest which operate in conjunction with each other, a NC lathe which can perform simultaneous machining in said plurality of spindle, said control unit, said Controls the entire control unit
Compatible with system control unit, display, and each axis system
Process subprogram display data and process edit program
A display data storage unit that stores the display data , and the system control unit stores the display data storage unit in the display data storage unit.
Process subprogram display data and process editing program
Using Gram display data, said side by side program number steps subprogram summarizes the part program is a series of NC machining program for each machining step, the order in which the run for each spindle used in each processing step Disupu
The function to be displayed on the screen of the ray and the cumulative machining time when each process subprogram is sequentially executed are displayed on the display.
NC lathe characterized by chromatic and a function to be displayed on the same screen b. 6. The NC lathe according to claim 5 , wherein:
Display the accumulated machining time on the same screen of the display.
The function for displaying is a machine for displaying the cumulative addition time in a graph showing the ratio of the processing time by each process subprogram.
NC lathe characterized by being Noh .