JPH07100279B2 - Numerical control device for combined processing lathe - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a numerical control device (hereinafter, referred to as NC) device for a composite machining lathe (for example, NC lathe).

(Prior art) In NC lathes that have multiple spindles and turrets and perform multi-step machining by various combinations of them, conventionally, the instruction code on the machining program for spindles and tools such as rotation commands is Specific to the spindle and the tool.

Here, a conventional machining program for a combined machining lathe will be described.

FIG. 1 is a NC to which the present invention can be applied and which has a plurality of spindles and a tool post for a machining process for machining two workpieces.
It is an external view of an example of a lathe. 1 is the first spindle, 2 is the first
It is a turret, and the first rotary tool 3 is attached to the first turret 2. Further, 4 is a second spindle attached to the first turret 2, 5 is a second turret, and a second turret 5
A second rotary tool 6 is attached to the. Here, the rotary tool 3 and the spindle 4 are rotated by the same drive system. In this NC lathe, the first process is processed by the combination of the rotary tool 3 loaded on the first spindle 1 and the first turret 2 and the turning tool 3A, and loaded on the second spindle 4 and the second turret 5. The second process is processed by a combination of the rotary tool 6 and the turning tool 6A.

FIG. 6 shows an example of a machining program when each spindle, tool post, and tool of the NC lathe shown in FIG. 1 is given a unique instruction code. The meanings of the instructions in this processing program are as follows. However, the first
Since the rotary tool 3 on the tool rest 2 and the second spindle 4 have the same drive system, the control commands are the same.

Part A is turning by the turning tool 3A loaded on the first tool post 2 for the work 1A of the first spindle 1.

M83 ...... 1st spindle chuck closed M03 ...... 1st spindle rotation SA ...... 1st spindle rotation speed command M05 ...... 1st spindle stop Part B is loaded on the 1st tool post 2 for the workpiece 1A of the 1st spindle 1. It is the milling cutting of the rotary tool 3 that has been performed.

M13 ...... 1st rotary tool rotation command SB ...... 1st rotary tool rotation speed command M12 ...... 1st rotary tool stop command Part C was loaded on the 2nd tool rest 5 for the work 4A of the 2nd spindle 4. This is turning of the turning tool 6A.

M183 …… Second spindle chuck closed M 13 …… Second spindle rotation command SB …… Second spindle rotation speed command M 12 …… Second spindle rotation stop Part D is the second tool for the workpiece 4A of the second spindle 4 This is milling cutting of the rotary tool 6 loaded on the table 5.

M123 …… 2nd rotary tool rotation command Sc …… 2nd rotary tool rotation speed command M125 …… 2nd rotary tool stop command As described above, the work is identified by carefully referring to the meaning of each command, and this work Understand which spindle or turret is provided, and then understand which spindle or turret is provided with the tool for machining the above work, and understand the machining program to understand what machining It's hard to understand if you're trying to do it.

(Problems to be solved by the invention) Therefore, in the machining program, in all machining steps, it is necessary to always be aware of which combination of spindles and turrets should be used to select the instruction code, and to select the spindles and turrets. Since the number of instruction codes increases with the number of, there is a drawback that the program becomes difficult and complicated.

The present invention has been made under the circumstances as described above, and an object of the present invention is to provide a machining program with any combination of a spindle and a tool in multi-step machining of an NC device.
An object of the present invention is to provide an NC device that can execute combination control commands for a spindle and a tool with the same command code and execute a complex machining program that is simple and easy to understand.

(Means for Solving the Problem) The present invention has a plurality of spindles and a tool rest, and a plurality of workpieces and tools are fixed to these spindles and a tool rest respectively to perform machining, and a numerical control device for a combined machining lathe is provided. The above object of the present invention is to specify a spindle or a tool rest on which a workpiece to be machined is provided in a command of a machining program for machining the workpiece, and to provide a tool used for the machining. A combination designation command for specifying a spindle and a turret for specifying a turret or a spindle is provided for each combination of the spindle and the turret, and when the machining program is executed, the combination designation command is analyzed and the combination command command is given. The spindle and tool selected in step S1 and the combination analyzer that generates the spindle selection signal and the tool selection signal, and the control target for the spindle command code of the machining program Is provided by the spindle selection signal, and a tool selection unit that selects the controlled object for the command code of the tool of the machining program by the tool selection signal.

(Function) In the NC lathe having a plurality of spindles and a tool post, there are a plurality of types of "combination of the spindle and the tool post" in processing.
Therefore, in the present invention, a "combination designation command" for newly designating the "combination of spindle and tool post" type in the machining program is newly provided. This "combination designation command" is analyzed by a combination command analysis unit to generate a spindle selection signal and a tool selection signal, and the spindle selection unit and the tool selection unit issue a command code for the spindle and the tool post based on the spindle selection and the tool selection unit. By selecting the controlled spindle and turret that correspond to
A combination of the spindle and the tool post used for machining can be determined one by one from among the plurality of spindles and the tool post. Therefore,
If a control command code for one set of spindle, turret, and tool is determined, in combination with the "combination designating command", the spindle and the turret are respectively combined in all cases. Allows control over the tool.

Therefore, by issuing the "combination designation command" in the machining program, the machining program can be created with the same image for all combinations of the spindle and the tool rest.

(Example) Below, the Example of this invention is described with reference to an accompanying drawing.

FIG. 2 shows an example of a machining program according to the present invention,
The operation content is the same as the program of FIG. Here, parts E and F of the machining program of FIG. 2 correspond to parts A, B and C, D of FIG. 6, respectively.
Designating commands G120 and G1 at the beginning of parts E and F, respectively
21 is described. Here, G120 is a designated command for the combination of the first spindle 1, the first turret 2, and the first rotary tool 3, and G121 is for the combination of the second spindle 4, the second turret 5, and the second rotary tool 6. It is a designated command. Others are defined as follows.

M83 …… Chuck closed M03 …… Spindle rotation command S …… Spindle rotation speed command M05 …… Spindle rotation stop command M13 …… Rotary tool rotation command M12 …… Rotation tool stop command SB …… Rotation tool rotation speed command Therefore, specify It is easy to understand which combination is immediately understood by the commands G120 and G121, and the two steps E and F of the specified commands G120 and G121 and below are programmed in exactly the same image.

FIG. 3 shows an example of the configuration of a control device for executing the program of the present invention by taking a spindle rotation command as an example from the combined control of the spindle, the tool rest, and the tool. FIG. 4 is a flow chart showing the control operation.

The first drive unit 16 drives the first spindle 1, the second drive unit 17 drives the first rotary tool 3 and the second spindle 4, and the third drive unit 18 drives the second rotary tool 6. The machining program to be executed is read from a tape, a floppy disk or the like and stored in the machining program buffer 7.
The program reading unit 8 reads the machining program block by block from the machining program buffer 7 (step S1),
The spindle rotation command resolving unit 9 distributes the spindle and tool rotation commands to the spindle and tool, respectively, to form a spindle rotation command MR and a tool rotation command TR. The combination command analysis unit 10 determines whether or not there is a combination command for the spindle and the tool post for the program for each block read by the program reading unit 8 (step S3). By the "combination designation command (eg G120, G121)" of the spindle and the turret,
Selection signals SLM and SLT for the spindle and the rotary tool are formed and input to the spindle selection unit 11 and the tool selection unit 12, respectively. The spindle selection signal SLM causes the spindle selection unit 11 to switch between inputting the spindle rotation command MR to either the first drive control unit 13 or the second drive control unit 14, whereby the first spindle 1 or the second spindle 4 is selected. Either is rotated. Further, the tool selection unit 12 outputs the tool rotation command TR to the second by the rotary tool selection signal SLT.
The input to the drive control unit 14 or the third drive control unit 15 is switched, whereby either the first rotary tool 3 or the second rotary tool 6 is rotated. Considering the program example in FIG. 2, the spindle selection section 11 is switched to the first drive control section 13 and the tool selection section 12 is switched to the second drive control section 14 by the designation command G120 (steps S10 and S11). In accordance with the command command G121, the spindle selection unit 11 switches to the second drive control unit 14 and the tool selection unit 12 switches to the third drive control unit 15 (steps S10 and S12), and the combination command analysis unit 10 selects the selection signal SML. And SLT to form a spindle selection unit 11 and a tool selection unit 12
Enter each in.

On the other hand, if the combination command is not determined in step S3, it is determined whether the command is a spindle rotation command (step S3).
4) If it is a spindle rotation command, then it is judged whether or not it is the second spindle selection signal (step S5). Then, if it is the second spindle selection signal, the second drive section is passed through the second drive control section 14.
17 control is performed (step S6), otherwise, the first
The first drive unit 16 is controlled via the drive control unit 13 (step S7). If the spindle rotation command is not discriminated in step S4, it is determined whether or not it is a rotating tool rotation command (step S20), and if not, control other than axis rotation is performed via the control unit 20 (step S20). S23). If it is a rotation command for the rotary tool, it is judged whether or not it is the second rotary tool selection signal (step S21), and if so, the third drive unit 18 is controlled via the third drive control unit 15 ( Step S22), otherwise, the process proceeds to step S6.

In the above, the case where there are two main spindles and turrets has been described, but as shown in FIG. 5, there are two saddles, and a main spindle 41 is provided so as to face the first main spindle 1 " The same applies to the case where there are various combinations. Arrows ~ in Fig. 5 indicate that the work at the tip of the arrow is cut by the tool at the base of the arrow. There are 7 combinations as indicated by arrows ~,
For each of these seven combinations, it is sufficient to define an “instruction for specifying the combination”. In other words, if you define "commands to specify combinations" for the number of combinations of spindle and turret,
With one set of control commands for the spindle, turret, and tool and the "command for specifying the combination", the spindle, turret, and tool can be controlled for all combinations.

(Effect of the Invention) In the numerical control device for a combined machining lathe according to the present invention, one of many commands unique to the control of the spindle, the tool rest, and the tool is selected according to the combination of the spindle and the tool rest. Since it is not necessary to select one of them and the machining program can be created with the same image in any combination, it is very easy and easy to think.

[Brief description of drawings]

1 is an external view of an NC lathe to which the present invention can be applied, FIG. 2 is a diagram showing a program example of the present invention, FIG. 3 is a configuration diagram showing an application example of the present invention, and FIG. 4 is an operation example thereof. FIG. 5 is a flowchart showing a modified example of the present invention, and FIG. 6 is a view showing a conventional program example. 1,4 …… Spindle, 2,5 …… Turret, 3,6 …… Rotating tool, 7…
... Machining program buffer, 8 ... Program reading section,
9 ... Axis rotation command analysis unit, 10 ... Combination command analysis unit, 11
...... Spindle selection section, 12 …… Tool selection section, 16 to 18 …… Drive section.

Claims (1)

[Claims] 1. A numerical control device for a multi-tasking lathe, comprising a plurality of spindles and a tool rest, and fixing a plurality of works and tools respectively to the spindles and the tool rest to process the work. A combination of a spindle and a turret for specifying a spindle or a turret provided with a workpiece to be machined in a command of a machining program and also specifying a turret or a spindle provided with a tool used for the machining. A designation command is provided for each combination of the spindle and the tool post, and when the machining program is executed, the combination designation command is analyzed, the spindle and the tool selected by the combination designation command are specified, and a spindle selection signal and a tool A combination analysis unit that generates a selection signal, a spindle selection unit that selects a control target for the instruction code of the spindle of the machining program by the spindle selection signal, and an addition unit. Composite working lathe for a numerical controller of the control object for the instruction code, characterized in that comprises a tool selection unit for selecting by the tool selection signal of the program of the tool.