JPH0276602A - Complex processing machine tool and its control method - Google Patents

Abstract

PURPOSE:To enable milling work accompanied by lathe turning and a C shaft control by directly connecting a main drive motor to a work main shaft and installing a brake clamp means for the work main shaft. CONSTITUTION:A main shaft drive motor 10 is directly connected to a work main shaft 11 which can hold a work 13 and a brake clamp means such as a brake device 16 is installed on the work main shaft 11. Whether contents to be processed shown in a processing program PRO it lathe turning processing or C shaft control processing is judged by a processing contents judging means such as a main control unit 2 and in the case of the lathe turning processing, the main shaft drive motor 10 is driven to process the work 13 without operating the brake clamping means, and in the case when the content of the processing is C shaft control processing, the brake clamping means is operated to limit the rotation of the work main shaft 11. Thus it is possible to change the rigidity of the work main shaft 11 according to the content of processing and to make accurate processing action even if the work main shaft 11 and the main shaft drive motor 10 are set up in mutually directly connected configuration.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application The present invention relates to a multi-tasking machine tool capable of performing turning, milling with C-axis control, etc., and a control method thereof.

(b), Conventional technology Conventionally, this type of multi-tasking machine tool has a motor for C-axis control machining and a motor for turning, which are separately provided.
To perform axis control machining, the C-axis drive motor is connected to the workpiece spindle for machining, and for turning, the C-axis drive motor is disconnected from the workpiece spindle and the turning motor rotates the workpiece spindle. I was letting it happen.

(C) 0 Problems to be Solved by the Invention However, with such a configuration, it is necessary to disconnect and connect the C-axis drive motor every time the C-axis control machining and turning machining are switched.
There was an inconvenience that the switching operation required time.

In order to eliminate such inconveniences, it is possible to connect one spindle drive motor directly to the workpiece spindle and use this motor to control the C-axis and perform turning, but in that case, the rigidity of the workpiece spindle during C-axis control machining tends to be in short supply.

In order to eliminate the above-mentioned drawbacks, the present invention provides a multi-tasking machine tool and its control method, which prevents the workpiece spindle from becoming insufficiently rigid during C-axis machining even when the spindle drive motor and the workpiece spindle are directly connected. The purpose is to provide

(d) Means for solving the zero problem, that is, the present invention has a workpiece spindle (11) capable of holding a workpiece (13), and a spindle drive motor (10) is directly connected to the workpiece spindle (11). The workpiece spindle (1
1) Brake/clamp means (
16) is provided, and a machining content determining means (2) is provided for determining the content to be machined indicated in the machining program (PRO), and the brake is adjusted according to the machining content determined by the machining content determining means (2). - A brake control means (6) is provided to control the clamp means (16), and a motor control means (7) is provided to drive and control the spindle drive motor (10) according to the machining contents instructed by the machining program (PRO). provided and configured.

It is also possible to configure the machining content determination means (2) to determine whether the machining content is turning, C-axis angle changing machining, or C-axis angle fixed machining.

Further, the present invention has a workpiece spindle (11) capable of holding a workpiece (13), a spindle drive motor (10) is directly connected to the workpiece spindle (11), and a spindle drive motor (10) is directly connected to the workpiece spindle (11).
11) is provided with brake/clamp means (16) for the workpiece spindle (11), and machining content determining means (11) for determining whether the content to be machined indicated in the machining program (PRO) is turning or C-axis control machining. 2), and when the machining content determined by the machining content determining means (2) is turning, the spindle drive motor (1o) is driven without operating the brake/clamping means (16) to remove the workpiece. (13)
When the machining content determined by the machining content determining means (2) is C-axis control machining, the brake/clamping means (16) is operated to restrict the rotation of the workpiece spindle (11). In this state, the workpiece (13) is processed.

Furthermore, the present invention has a workpiece spindle (11) capable of holding a workpiece (13), a spindle drive motor (10) is directly connected to the workpiece spindle (11), and the workpiece spindle (13) is directly connected to the spindle drive motor (10).
11) is provided with a brake/clamping means (16) for the workpiece spindle (11), and the machining contents shown in the machining program (PRO) are turning machining or C-axis angle change machining.
A machining content determining means (2) for determining whether machining is performed with a fixed shaft angle is provided, and if the machining content determined by the machining content determining means (2) is turning machining, the spindle is rotated without operating the brake/clamp means. The drive motor (10) is driven to perform machining on the workpiece (13), and if the machining content determined by the machining content determining means is C-axis angle change machining, the brake/clamping means is operated to control the workpiece main axis. When the workpiece (13) is machined while rotating the workpiece spindle (11) with the brake applied to (11), and further, the machining content determined by the machining content determination means is C-axis fixed angle machining. The brake
The clamping means is operated to clamp the workpiece spindle (11), and the workpiece (13) is machined.

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description should not be limited to the descriptions on the drawings. Below r (e
), the same applies to the column for effect J.

(e) 6 Effects With the above-described configuration, the present invention has the processing content determining means (2
), if the machining content of the machining program (PRO) determined by
6) without operating the spindle drive motor (10) to perform machining on the workpiece (13), and the machining content determined by the machining content determination means is C-axis angle changing machining, C-axis angle fixed machining, etc. In the case of C-axis control machining, the brake/clamp means is operated to perform machining on the workpiece (13) while the rotation of the workpiece spindle (11) is restricted, such as in a braked state or a clamped state.

(f), Example.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a control block diagram showing a 1° embodiment of a multitasking machine tool according to the present invention, and FIG. 2 is a flowchart showing an example of a workpiece spindle control program.

As shown in FIG. 1, the multitasking machine tool 1 has a main control section 2, and the main control section 2 includes a machining program memory 3, a system program memory 5, a brake control section 6,
A motor control section 7, a turret control section 8, etc. are connected.

A brake drive section 9 is connected to the brake control section 6, and a main shaft drive motor 10 is connected to the motor control section 7. The main shaft drive motor 10 has a work main shaft 11 that is integrated with an output shaft, and a chuck 12 is removably provided at the right end of the work main shaft 11 in the figure.

A workpiece 13 to be machined is mounted on the chuck 12 so as to be freely grippable, and a rotational speed detector 15 and a rotational angle detector 14 are connected to the aforementioned motor control unit 7 on the left side of the workpiece main shaft 11 in the figure. It is set up in the form of Work spindle 1
Further to the left of the rotation angle detector 14 of No. 1, a brake plate 16a constituting the brake device 16 is fixed, and at the lower part of the brake plate 16a in the figure, there is a U-shaped t.
A cobrake main body 16b is provided. The brake body 16b is provided with brake shoes 16c, 16c each having a brake lining attached to the surface thereof, so as to sandwich the brake plate 16a from both sides so as to be able to protrude from the brake plate 16a. The brake drive unit 9 described above is connected to the brake body 16b in such a manner that it can freely drive the brake shoes 16c, 16c.

Further, on the right side of the main shaft drive motor 10 in the figure, a tool post 17 is provided.
are provided so that they can be freely moved and driven in the x and Z axis directions perpendicular to each other by the tool post control section 8. On the tool post 17, rotary tools 19 such as drills and milling cutters can be freely driven and rotated, and turning tools such as cutting tools, etc. A tool (not shown) is provided.

Since the multi-tasking machine tool 1 has the above configuration, when performing turning and milling with C-axis control on the workpiece 13 held by the chuck 12 using the multi-tasking machine tool 1, , the main control unit 2 selects a nib four gram P corresponding to the workpiece 13 from the nib supply gram memory 3.
RO is read out, and the spindle drive motor 10 is driven and controlled based on the machining program PRO to perform machining. On this occasion,
The main control unit 2 reads the workpiece spindle control program WSP from the system program memory 5, and drives and controls the spindle drive motor 10 according to the workpiece spindle control program WSP.

That is, as shown in FIG. 2, the workpiece spindle control program WSP determines whether the machining instructed by the machining program PRO is turning machining or mill machining using C-axis control in step S1. Determine from the contents of. In the machining program PRO, normal turning processes and machining processes involving C-axis control are stored separated by appropriate control codes.
It is easy to determine whether the machining instructed by the RO is turning or C-axis control machining.

If turning using a turning tool is instructed in the machining program PRO, the process proceeds to step S2, and the main controller 2 instructs the motor controller 7 to move the workpiece spindle 11 according to the machining program PRO. At the same time, the tool rest 17 is commanded to rotate at a circumferential speed of
is moved in the x1Z direction based on the instructions of the machining program PRO, and a predetermined turning process is performed on the workpiece 13 held by the chuck 12 using the turning tool mounted on the tool post 17. At this time, since the brake device 16 is not driven at all, the workpiece spindle 11 is in a state where it can rotate freely without being subjected to any restraints, and the machining of the workpiece 13 with the turning tool can be performed smoothly. .

When one step of machining in the machining program PRO has been completed and the machining of the workpiece 13 with the cutting tool has ended, there is a message in step S3 of the workpiece spindle control program WSP that some machining is to be performed in the next step of the machining program PRO. It is determined whether or not a command has been given, and if no machining has been commanded, it is determined that the machining by the machining program PRO has been completed, and the machining of the workpiece 13 is ended. In addition, the workpiece spindle control program W
If it is determined in step S3 of SP that some kind of machining is instructed in the next step of machining program PRO, the process returns to step S1 and the machining program P
It is determined whether the machining instructed by the RO is a turning machining or a C-axis control machining that involves C-axis control.

In step S1, if the machining commanded by the machining program PRO is C-axis control machining, the process proceeds to step S4, where the main controller 2 controls the spindle drive motor 10 via the motor controller 7.
The workpiece spindle 11 is rotated at a low speed and positioned at the C-axis angular position specified in the machining step of the machining program PRO. When the workpiece spindle 11 has been positioned at a predetermined C-axis angular position and the workpiece 13 gripped by the chuck 12 has also been positioned at a predetermined C-axis position, step S5 is entered, and machining involving C-axis control is started at the C-axis. Colletering (contour) machining, etc., in which machining is performed using a rotary tool while rotating the shaft and therefore rotating the workpiece 13.
C-axis angle change machining or drilling and keyway machining with the C-axis (work 13) fixed at a predetermined angle position.
Determine whether or not the shaft angle is fixed. If the C-axis control machining is C-axis angle change machining in which machining is performed while rotating the C-axis, the process proceeds to step S6, and the main control unit 2 controls the brake control unit 6.
A command is given to the brake drive unit 9 to brake the workpiece spindle 11 by the brake device 16 via the brake controller 9 . Then, the brake drive unit 9 moves each brake shoe 16c, 16C of the brake device 16 toward the brake plate 16a,
Gently sandwich the brake plate 16a between the brake shoes 16c, 16c. As a result, the resistance accompanying the rotation of the workpiece spindle 11 is increased by the braking action of the brake device 16, and the rigidity around the C-axis is improved. In this state, the motor control unit 7 rotates the spindle drive motor 10 at a low speed in accordance with the instruction of the machining program PRO in a manner that resists the braking action of the brake device 16 to rotate the workpiece 13 gripped by the workpiece spindle 11. While rotating at a predetermined angular velocity, the tool post control unit 8 moves the tool post 17 in the X-axis and Z-axis directions, and performs a predetermined milling process on the workpiece 13 using the rotary tool 19 attached to the tool post 17.
(Step 37). At this time, workpiece spindle 1
1 is intermittently subjected to a strong cutting force by the cutting operation by the rotary tool 19, but the workpiece spindle 11 is not supported by the brake device 1.
Since the brake is applied by 6 and the rigidity around the C axis is improved, the cutting force by the rotary tool 19 forces the workpiece spindle 11 against the control operation by the motor controller 7. The occurrence of a situation where the rotation occurs is prevented.

In this way, the rotary tool 19. When the milling of the workpiece 13 is completed, step S8 is entered, and the brake control unit 6 instructs the brake drive unit 9 to stop the brake operation. The brake shoes 16c, 16c are moved in a direction away from the brake plate 16a, and the brake state of the workpiece spindle 11 up to that point is released.

Next, the workpiece spindle control program WSP is executed in step S3.
In the next step of the machining program PRO, it is determined whether any machining has been commanded, and if no machining has been commanded, it is determined that the machining by the machining program PRO has ended. , the machining of the workpiece 13 is completed. Furthermore, if it is determined in step S3 of the workpiece spindle control program WSP that some kind of machining has been commanded in the next step of the machining program PRO, the process returns to step S1 and the command is given to the machining program PRO. It is determined whether the machining is turning or C-axis control machining.

In step S1, if the machining commanded by the machining program PRO is C-axis control machining, the process proceeds to step S4, where the main controller 2 controls the spindle drive motor 10 via the motor controller 7.
The workpiece spindle 11 is rotated at low speed and positioned at the C-axis angular position instructed in the second step of the machining program PRO. When the workpiece spindle 11 has been positioned at a predetermined C-axis angular position and the workpiece 13 gripped by the chuck 12 has also been positioned at a predetermined C-axis position, step S5 is entered, and machining involving C-axis control is performed on the C-axis. Determine whether it is angle change machining or C-axis angle fixed machining. If the C-axis control machining is fixed C-axis angle machining, step S9
Then, the main control section 2 instructs the brake drive section 9 via the brake control section 6 to cause the brake device 16 to clamp the workpiece spindle 11. Then, the brake drive section 9 drives each brake shoe 16c, 1 of the brake device 16.
6c to the brake plate 16a side, and
m is clamped by the brake shoes 16a116c. As a result, the workpiece spindle 11 enters a clamped state in which its rotation around the C-axis is restrained by the clamping action of the brake device 16, and the workpiece 13 gripped by the workpiece spindle 11 via the chuck 12 is also at a predetermined C-axis angular position. is held fixed. Therefore, the tool post control unit 8 drives the tool post 17 to move in the X-axis and Z-axis directions, and performs milling processing such as predetermined drilling or keyway processing on the workpiece using the rotary tool 19 attached to the tool post 17. 13 (step 510). At this time, since the workpiece spindle 11 is clamped by the brake device 16, even if the cutting force from the rotary tool 19 acts on the workpiece spindle 11, the workpiece 13 is accurately held at a predetermined angular position.

In this way, when the C-axis control machining of the workpiece 13 by the rotary tool 19 is completed, step S11 is entered, and the brake control section 6 instructs the brake drive section 9 to stop the clamping operation, and in response to this, the brake drive section 9 moves the brake shoes 16c, 16c of the brake device 16 in a direction away from the brake plate 16a, and releases the clamped state of the workpiece spindle 11 up to that point.

Next, the workpiece spindle control program WSP is executed in step S3.
In the next step of the machining program PRO, it is determined whether any machining has been commanded, and if no machining has been commanded, it is determined that the machining by the machining program PRO has ended. , the machining of the workpiece 13 is completed. Furthermore, if it is determined in step S3 of the workpiece spindle control program WSP that some kind of machining has been commanded in the next step of the machining program PRO, the process returns to step S1 and repeats the steps already described. Processing will continue.

(g) 0 Effects of the Invention As described above, according to the present invention, the workpiece spindle 11 capable of holding the workpiece 13 is provided, and the spindle drive motor 10 is directly connected to the workpiece spindle 11, The workpiece spindle 11 is provided with a brake/clamp means for the workpiece spindle 11 such as a brake device 16, and a machining content determination means such as the main control unit 2 for determining the content to be machined shown in the machining program PRO is provided. Brake control means such as a brake control section 6 for controlling the brake/clamp means according to the machining content determined by the content determination means are provided, and the spindle drive motor 10 is controlled according to the machining content instructed by the machining program PRO. Since the configuration includes a motor control means such as a motor control section 7 for controlling the drive, the spindle drive motor 1
Even if the C is directly connected to the workpiece spindle 11, the brake/clamp means can be driven depending on the machining content.
Axis control enables control to compensate for the lack of rigidity of the workpiece spindle 11 during machining. Therefore, it is possible to provide a multi-tasking machine tool 1 that does not require the conventional disconnection and connection operations of the C-axis drive motor with respect to the workpiece spindle, and that also ensures sufficient spindle rigidity during C-axis control.

Further, the machining content determination means determines whether the machining content is turning or not.
When determining whether axis angle changing machining or C axis angle fixed machining, C
Axis control enables more fine-grained control depending on the machining content.

It also has a workpiece spindle 11 that can hold a workpiece 13,
A spindle drive motor 10 is directly connected to the workpiece spindle 11, and a brake/clamp means for the workpiece spindle 11, such as a brake device 16, is provided on the workpiece spindle 11, and the content to be machined indicated in the machining program PRO is , a machining content determining means such as the main control unit 2 for determining whether turning machining or C-axis controlled machining is provided, and when the machining content determined by the machining content determining means is turning machining, the brake/clamp means is operated. If the machining content determined by the machining content determining means is C-axis control machining, the workpiece spindle 11 is operated by operating the brake/clamping means. If the workpiece 13 is machined while the rotation of the workpiece spindle 11 is restricted, even if the workpiece spindle 11 and the spindle drive motor 10 are directly connected, the workpiece spindle 11
It becomes possible to change the rigidity according to the machining contents such as turning and C-axis control machining (the main shaft rigidity around the C-axis is zero in the case of turning), making it possible to perform accurate machining operations.

It also has a workpiece spindle 11 that can hold a workpiece 13,
A spindle drive motor 10 is directly connected to the workpiece spindle 11, and a brake/clamp means for the workpiece spindle 11, such as a brake device 16, is provided on the workpiece spindle 11, and the content to be machined indicated in the machining program PRO is , a machining content determination means such as the main control unit 2 is provided to determine whether it is turning, C-axis angle changing machining, or C-axis angle fixed machining, and if the machining content determined by the machining content determination means is turning, teeth,
The workpiece 13 is machined by driving the spindle drive motor 10 without operating the brake/clamp means, and the machining content determined by the machining content determining means is C.
In the case of shaft angle change machining, the workpiece 13 is machined while rotating the workpiece spindle 11 with the brake/clamp means being operated to apply a brake to the workpiece spindle 11. If the machining content determined to be explosive is C-axis fixed angle machining, the brake/
If the workpiece 13 is machined while the clamping means is operated to clamp the workpiece spindle 11, the workpiece spindle 11 can be moved according to the processing content such as turning, C-axis angle changing machining, C-axis angle fixed machining, etc. This makes it possible to change its rigidity.

[Brief explanation of the drawing]

FIG. 1 is a control block diagram showing one embodiment of a multitasking machine tool according to the present invention, and FIG. 2 is a flowchart showing an example of a workpiece spindle control program. 1... Multi-tasking machine tool 2... Machining content determination means (main control section) 6...
...Brake control means (brake control section) 7...
...Motor control means (motor control section) 10 ... Spindle drive motor 11 ... Workpiece spindle 13 ... Workpiece 16 ... Brake clamp means (brake device) PRO・・・Processing program applicant Yamazaki Mazak Co., Ltd. agent Patent attorney Phase 1) Shinji (and 2 others)

Claims (1)

[Scope of Claims] (1) A workpiece spindle capable of holding a workpiece, a spindle drive motor directly connected to the workpiece spindle, and a workpiece spindle brake/clamp means provided on the workpiece spindle, A machining content determining means is provided for determining the machining content indicated in the machining program, and a brake control means is provided for controlling the brake/clamping means in accordance with the machining content determined by the machining content determining means, and the machining is performed. A multi-tasking machine tool that is equipped with a motor control means that controls the spindle drive motor according to the machining contents instructed by the program. (2) The compound machining work according to claim 1, wherein the machining content determining means determines whether the machining content is turning, C-axis angle changing machining, or C-axis angle fixed machining. machine. (3) It has a workpiece spindle that can hold the workpiece, a spindle drive motor is directly connected to the workpiece spindle, and the workpiece spindle is equipped with brake and clamp means for the workpiece spindle, and the workpiece spindle is provided with brake and clamp means for the workpiece spindle, as indicated in the machining program. A machining content determination means is provided for determining whether the content to be machined is turning or C-axis control machining, and if the machining content determined by the machining content determination means is turning, the brake/clamp means is operated. If the machining content determined by the machining content determination means is C-axis control machining, the rotation of the workpiece spindle is restricted by operating the brake/clamp means. A control method for a multi-tasking machine tool configured to perform machining on the workpiece in a state in which the workpiece is machined. (4) It has a workpiece spindle that can hold the workpiece, a spindle drive motor is directly connected to the workpiece spindle, and the workpiece spindle is provided with brake and clamp means for the workpiece spindle, and the workpiece spindle is provided with brake and clamp means for the workpiece spindle, as indicated in the machining program. A machining content determining means is provided for determining whether the content to be machined is turning, C-axis angle changing machining, or C-axis angle fixed machining, and when the machining content determined by the machining content determining means is turning, , the workpiece is machined by driving the spindle drive motor without operating the brake/clamp means, and when the machining content determined by the machining content determination means is C-axis angle change machining, the brake/clamp means is activated. The workpiece is machined while rotating the workpiece spindle with the brake applied to the workpiece spindle, and furthermore, if the machining content determined by the machining content determination means is C-axis fixed angle machining, the brake is applied to the workpiece spindle. A control method for a multi-tasking machine tool configured to operate a clamping means to perform machining on the workpiece while clamping the workpiece spindle.