JPH0232370Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a mass production machine using a machining unit that processes workpieces, and in particular a machining unit that can programmably control the cutting feed axis using a servo motor control device. The present invention relates to a unit control device for a mass production machine that has expandability of processing functions by using multiple units.

Conventionally, in various machine tools, etc., a DC motor drive system, in which a DC motor is used to move a slide table on which a tool is mounted, has generally been adopted as a means of controlling a processing unit that processes a workpiece. ing. However, with this type of DC motor drive system, maintenance becomes troublesome when configuring a feedback system for position and speed signals, so today, AC servo motor drive systems that use AC motors are attracting attention. It became. On the other hand, when a mass production machine is configured by combining the above-mentioned machining units, flexibility is required to enable the production of a wide variety of workpieces. For example, for numerically controlled machine tools, machining programs can be changed. It is desirable to be able to do this easily, improve the control performance of each processing unit, and simplify maintenance.

Therefore, the inventors of the present invention have conducted various studies in order to obtain a machining unit that can flexibly respond to multi-product production using the conventional mass production machine mentioned above. A machining unit is configured such that movement is controlled by a motor and the tool is driven by a spindle motor, and this machining unit is equipped with a sequence control section that sequentially controls the AC servo motor and the spindle motor based on a machining program. The main control is equipped with a unit control panel, a sub-operation box for operating the sequence control section in close proximity to the unit control panel, and a programmable sequence controller for instructing the unit control panel to execute a predetermined sequence. By providing a main control panel and a main operation box that performs batch operations on the main control panel, it is possible to easily issue sequence commands between the main control panel and the unit control panel, and it is also easy to select multiple machining programs. Moreover, it has been found that the processing units can be assembled and adjusted independently, and that mass production machines such as transfer machines can be easily assembled by combining these processing units without any particular restrictions.

Therefore, the purpose of the present invention is to configure a machining unit equipped with a unit control panel that commands programmable machining control, thereby making it possible to collectively control this machining unit with other machining units, and also to enable individual control. To provide a unit control device for a mass production machine, which can easily and flexibly respond to changes in machining programs, and can combine these machining units without restriction.

In order to achieve the above object, the present invention provides a plurality of machining units each equipped with an AC servo motor that controls the movement of the tool position relative to the workpiece, and a spindle motor that drives the tool. A unit control device for a mass production machine comprising a control panel equipped with a programmable sequence controller that controls based on a machining program, comprising: an AC servo motor control section and a spindle motor control unit that control an AC servo motor and a spindle motor of the processing unit; a unit control panel, which is equipped with a sequence control section that issues commands to these control sections based on a required machining program, a power supply section, and a sub-operation box that operates this unit control panel. a main control panel equipped with a programmable sequence controller that commands a predetermined sequence to the unit control panels of each of the plurality of processing units; The sequence control section of the unit control panel and the programmable sequence controller of the main control panel are connected to enable data transfer, and each of the processing units is operated at once by the main operation box. It is characterized by being configured to be operated individually by a sub-operation box.

Next, an embodiment of a unit control device for a mass production machine having a plurality of processing units according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows the configuration and arrangement of a processing unit that makes up a mass production machine according to the present invention and each control element that makes up its control system. That is, FIG. 1 shows two processing units 10 and 1 arranged opposite to the workpiece.
Indicates 0. Note that the workpiece is attached to the fixture 12 as appropriate. The machining unit 10 includes an AC servo motor 14 that controls the movement of the tool relative to the workpiece.
and a spindle motor 16 that controls the drive of the tool. Note that the AC servo motor 14 is equipped with a pulse encoder 1 for detecting position and speed.
8 or the like is provided, and the processing unit is appropriately provided with an origin detector 20 for detecting the origin position of the moving tool.

On the other hand, the processing unit 10 is provided with a unit control panel 22 for programmably controlling the AC servo motor 14 and the main shaft motor 16, and a sub-operation box 24 for operating the unit control panel 22. placed in close proximity. Additionally, a main control panel 26 has a built-in programmable sequence controller that instructs each of the unit control panels 22 to execute a predetermined sequence.
A main operation box 28 is provided for performing batch operations. Moreover, in this case, the main control panel 26 and the main operation box 28 can also be made into an integral structure. In FIG. 1, wiring ducts 30 are connected between the unit control panel 22 and the sub-operation box 24, between the main control panel 26 and the main operation box 28, and between the unit control panel 22, the main control panel 26, and the fixture 12. Wired connection via.

Processing unit 1 configured and arranged as described above
Each control element for 0 is shown as a circuit control system as shown in FIG. Therefore, the first
The operation of the embodiment shown in the figure will be explained below with reference to the system diagram shown in FIG. In FIG. 2, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and detailed explanation thereof will be omitted.

First, the unit control panel 22 controls the processing unit 1.
0 AC servo motor 14 and main shaft motor 16
A sequence control section 32 for programmably controlling the motor, an AC servo motor control section 34, a spindle motor control section 36, and a power supply section 38 are provided.
In this case, the sequence control section 32 is instructed to perform a predetermined sequence from a programmable sequence controller of the main control panel 26, which will be described later. Further, the sequence control unit 32 is connected to the input/output elements of the sub-operation box 24 and the fixture 12, and performs data input/output control. Therefore, the processing unit 10
By appropriately operating the sub-operation box 24, the unit control panel 22 can be controlled to achieve machining control based on a predetermined machining program. At this time, for the AC servo motor control section 34,
Position and velocity detection signals from pulse encoder 18 and origin detector 20 are fed back to achieve highly accurate servo control.

On the other hand, the main control panel 26 includes a programmable sequence controller 40 and a power supply section 42.
In this case, the programmable sequence controller 40 has the function of controlling a plurality of unit control panels 22. Further, the programmable sequence controller 40 is connected to the input/output elements of the main operation box 28 and other devices (not shown), and performs data input/output control.

Therefore, when a plurality of machining units 10 having the above configuration are provided to configure a mass production machine such as a transfer machine, the unit control panels 22 of each machining unit can be operated collectively by the main operation box 28. It is also possible to configure the sub-operation box 24 to control the sub-operation box 24 individually.

As is clear from the above, the processing unit is equipped with a unit control panel equipped with a sequence control section, and this sequence control section is connected to the programmable sequence controller of the main control panel so that data can be transferred. Individual control can be performed according to a predetermined machining program, and even a plurality of machining units can be smoothly controlled based on a continuous machining program.

Therefore, according to the present invention, when a mass production machine system such as a transfer machine is configured with multiple machining units, it is possible to easily select a partial machining program in each machining unit. There is no limit to the number of machines that can be installed, providing the excellent advantage of being able to be used flexibly as a multi-product production machine.

Furthermore, by using an AC servo motor to control the feed of the processing unit, it is possible to downsize the unit control panel, and by providing a sequence control section for each unit control panel, the programmable sequence control system can be decentralized. By doing so, the main control panel can be significantly downsized, and the entire system as a mass-produced machine can be downsized.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing the basic configuration of a processing unit constituting a unit control device for a mass production machine according to the present invention and an example of its control elements, and FIG. 2 is a configuration layout diagram of each control element shown in FIG. It is a circuit system diagram. 10... Processing unit, 12... Fixture, 14
... AC servo motor, 16 ... Main shaft motor, 1
8... Pulse encoder, 20... Origin detector,
22...Unit control panel, 24...Sub-operation box, 2
6...Main control panel, 28...Main operation box, 30...Wiring duct, 32...Sequence control section (programmable sequence controller), 34...AC servo motor control section, 36...Spindle motor control section, 38 ...Power supply unit, 40...Programmable sequence controller, 42...Power supply unit.

Claims (1)

[Claim for Utility Model Registration] A plurality of machining units equipped with an AC servo motor that controls the movement of the tool position relative to the workpiece and a spindle motor that drives the tool are provided, and these machining units are operated based on a required machining program. A unit control device for a mass production machine comprising a control panel equipped with a programmable sequence controller for controlling the processing unit, each comprising an AC servo motor control section and a spindle motor control section for controlling an AC servo motor and a spindle motor of the processing unit. Furthermore, the machining unit is equipped with a unit control panel that includes a sequence control section that issues commands to these control sections based on a required machining program, a power supply section, and a sub-operation box that operates this unit control panel. , a main control panel equipped with a programmable sequence controller that commands a predetermined sequence to the unit control panels of each of the plurality of processing units; and a main control panel that allows the main control panel to collectively operate each of the unit control panels. An operation box is provided, and the sequence control section of the unit control panel and the programmable sequence controller of the main control panel are connected so that data can be transferred, and each processing unit is operated at once by the main operation box, and the sub-operation box is used to operate the processing units at once. A unit control device for a mass production machine, characterized in that the unit is configured to be operated individually.