JP6105016B1 - Machine tool controller - Google Patents

Abstract

The present invention makes it possible to visualize a more detailed operating status in accordance with the actual operation of a machine tool and to provide information for improving productivity to a user. A machine tool control device 10 reads and interprets an input NC program, a code setting unit 32 that presets NC program codes indicating machining start and machining end, and a code setting unit. A machining time counter 38 for starting the counting when the NC program code representing the machining start set in the above is executed, ending the counting when the NC program code representing the machining end is executed, and integrating the machining time; And a display unit 22 for displaying the machining time counted by the counter on the operation panel 20. [Selection] Figure 1

Description

  The present invention relates to a machine tool control apparatus capable of displaying a detailed operating status of a machine.

  In Patent Document 1, the machining time required for each machining process in the machining program is displayed in a graph, and the process order can be rearranged by selecting a process to be changed in the machining program so that the user can easily use the machining time. A method for displaying a graph of the machining program is described.

JP 2002-13211 A

  In the invention of Patent Document 1, the time for each block of the machining program (indicating one line of the program) is displayed. However, the actual operation time of the machine includes setup and feeding of workpieces and tools. Times that do not appear in the machining program, such as warm-up operation of the shaft, are included, and in order to increase the operation rate of the machine, it is necessary to analyze the operation status of the machine including the time that does not appear in the machining program.

  The present invention has a technical problem to solve such problems of the prior art, and can visualize a more detailed operation status in accordance with the actual operation of the NC machine tool and provide information for improving productivity to the user. An object of the present invention is to provide a control device for a machine tool.

In order to achieve the above object, according to the present invention, in a control device for a machine tool that drives and controls a machine tool based on an NC program, a read interpretation unit that reads and interprets the input NC program, and a machine tool A code setting unit for presetting NC program codes representing the start and end of processing for removing material from the workpiece, and the machining start set by the code setting unit in the NC program read and interpreted by the reading interpretation unit Counting is started when the NC program code representing is executed, and when the NC program code representing the end of machining is executed, the counting is ended and the machining time is accumulated, and the machining time counter counts and accumulates From the start signal of automatic operation by NC program until the end signal is received. It includes the automatic operation time counter that counts and accumulates the dynamic operation time, and the automatic operation time that is counted and accumulated by the automatic operation time counter, from when the machine power of the machine tool is turned on until the machine power is turned off. A power-on time counter that counts and accumulates the power-on time, and the power-on time, automatic operation time, and machining time that are counted and accumulated by the power-on time counter, the automatic operation time counter, and the machining time counter are arranged side by side There is provided a control device for a machine tool including a bar graph, and a display unit configured to display the bar graph as a bar graph on a daily, weekly, monthly, or yearly basis .

  According to the present invention, by counting and visualizing the actual machining time of a machine tool, a situation where the operation rate is decreasing in a specific time zone, a specific day of the week, and a month of the day is displayed. Can easily recognize and take countermeasures. In addition, the power-on time, automatic operation time, and machining time are arranged in a bar graph, and the bar graph is displayed as a bar graph on a daily, weekly, monthly, or yearly basis, so the difference between the power-on time and the automatic operation time is displayed. The difference between the automatic operation and the machining time and the difference between the power-on time and the machining time become obvious at a glance, and it becomes possible to investigate the cause in detail and take more detailed improvement measures to reduce these time differences.

1 is a block diagram illustrating a preferred embodiment of the present invention. It is the chart which enumerated one example of the work which may occur between when turning on the machine power supply and turning it off. It is a bar graph which shows an example of the operation situation visualized. It is a bar graph which shows an example of the operation situation visualized.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
The present invention can be applied to a laser beam machine, an electric discharge machine, a cutting machine, a grinding machine, and the like. In the present invention, a machine tool is configured to apply a workpiece to a laser irradiation head (laser machine), a wire in accordance with an NC program. Feed axis that moves relative to electrodes (wire electric discharge machine), general-purpose electrode (sinking electric discharge machine), rotating tool (machining center) mounted on the spindle, tool (automatic lathe), grinding wheel (grinding machine), etc. NC machine tool with

  In such NC machine tools, the time during which the machine tool is automatically operated based on the NC program (automatic operation) from when the machine power supply (main power supply) is turned on until the machine power supply is turned off (power on time). Time), the time during which work other than actual processing is performed is included. Referring to FIG. 2, in an NC machine tool, the laser processing machine adjusts the laser focus and water jet water pressure after the operator turns on the machine power by the power button 26 and before the automatic operation starts. In the wire electric discharge machine, the jet pressure of the machining liquid is adjusted, and in cutting and grinding machines such as a machining center and an automatic lathe, tools, jigs, workpieces are set up.

  Even if the operator starts the automatic operation by the cycle start button 24, during the automatic operation, the material is removed from the workpiece and the machining is actually executed. Workpiece or pallet exchange, coolant injection for automatic chip cleaning, workpiece and tool automatic measurement, workpiece coordinate system setting work, wire electrical discharge machine automatic connection, machining to machining tank in die-sinking electrical discharge machine Operations such as liquid supply and discharge are performed. The machining time is the net machining, that is, the time during which the material is removed from the workpiece, the laser beam is applied to the laser beam machine (laser on), the machining power source is turned on to the electric discharge machine, and the spindle is used for the cutting and grinding machine Is a time during which feed interpolation by a straight line or feed interpolation by an arc is performed.

  When the automatic operation is completed, daily maintenance, that is, chips are removed from the machine, the machine is cleaned, the coolant is replaced and replenished, the lubricating oil is replenished, or the filter is inspected. The machine power is then turned off and the machine goes to hibernation. This is the time when the machine is at rest due to nighttime, regular inspections and repairs, or because there is no production plan.

  Referring to FIG. 1, which is a block diagram showing a preferred embodiment of the present invention, a machine tool control device 10 reads and interprets a read / interpretation unit 12 that reads and interprets an NC program 40 from a CAM system (not shown) or the like. Interpolation unit 14 that interpolates the movement command from interpretation unit 12 and outputs a position command, servo control unit 16 that servo-controls the feed axis of machine tool 100 based on the position command from interpolation unit 14, operation panel 20, and machining A machining time counting unit 30 for counting time is provided as a main component. The operation panel 20 can be connected to a remote operation terminal 200 such as a personal computer, a tablet, or a smartphone via a wired or wireless communication line 300 such as a computer network or mobile phone data communication.

  The operation panel 20 includes at least a display unit 22, a cycle start button 24, and a power button 26. The display unit 22 can be formed from, for example, a touch panel that displays the currently executed line of the NC program 40, the current state of the control device 10 or the machine tool 100, and the like. The cycle start button 24 instructs the reading / interpreting unit 12 to start and stop automatic operation. The power button 26 is a switch for turning on and off the main power supply of the machine tool 100. In addition to the cycle start button 24, automatic operation is started and stopped by a start signal and a stop signal from a host computer, and automatic operation is stopped by an operation end code, an emergency stop switch, an operator included in the NC program. This is also done by a signal from an interlock circuit or the like that operates when the door is opened.

  The machining time counting unit 30 includes a code setting unit 32, a power-on time counter 34, an automatic operation time counter 36, and a machining time counter 38. The code setting unit 32 is a component in which the operator of the machine tool 100 defines the start and end codes for the machining time. That is, the NC program 40 is generally described including G code and M code, but which code in the NC program 40 should be started and ended when the machine tool 100 is to be executed. It depends on the type.

  Since the processing time is the time during which the material is actually removed from the workpiece, for example, in a laser processing machine, M4 (laser on) starts processing, M5 (laser off) ends processing, and in an electric discharge machine, M17 (processing) Machining center and automatic lathe for machining center and automatic lathe, M03 (main axis forward rotation), M04 (main axis reverse rotation) and G01 (linear interpolation), G02 (circular interpolation (clockwise)) ) Or G03 (circular interpolation (counterclockwise)) can be started, and M05 (main spindle stop) or M30 (program end) can be ended. The operator can select the machine tool 100 to be operated in this way. Then, the start and end timing of the machining time for the code setting unit 32 from the touch panel or keyboard (not shown) of the display unit 22 of the operation panel 20 M code or G code machining start code defined, set in advance as machining end code.

  The power-on time counter 34 counts the time from the time when the machine power of the machine tool 100 is turned on to the time when the machine power is turned off by the operation of the power button 26, and accumulates and stores this time. The automatic operation time counter 36 counts the time from the time when the automatic operation of the machine tool 100 is started to the time when the automatic operation is ended by the operation of the cycle start button 24 by the operator, and accumulates and stores this time. The machining time counter 38 refers to the M code or G code in the NC program 40 received for each block (one line) from the reading interpretation unit 12, and the machining start code set in the code setting unit 32 appears. The time from the recorded time to the time when the machining end code appears is counted, and this is accumulated and stored.

  For example, as shown in FIG. 3, the accumulated time is for each day of the week (Sunday to Saturday) for each of the power-on time (diagonal line), automatic operation time (operating time: dot), and processing time (black). It can be visualized by a bar graph or the like and displayed on the display unit 22 of the operation panel 20. Alternatively, only the processing time may be visualized as a bar graph every hour of the day. One or two of the power-on time, automatic operation time (operation time), and machining time may be selected and displayed. Furthermore, one, two, or all of the power-on time, automatic operation time (working time), and machining time can be selectively displayed on a daily, weekly, monthly, or yearly basis as required. . Furthermore, the operation status of the machine tool 100 visualized in this way can be displayed on the remote operation terminal 200 via the communication line 300.

  By visualizing the operation status in this way, the user can easily recognize the situation where the operation rate is decreasing in a specific time zone, a specific day of the week, and a month, and can take countermeasures. It becomes. For example, as shown in FIG. 4, when the difference ΔT1 between the power-on time and the automatic operation time is large or fluctuates depending on the day, the cause of the difference, the setup time of the tool, jig, workpiece, It is possible to take measures to reduce daily maintenance and inspection time such as cleaning and replenishment of consumables. Similarly, when the difference ΔT2 between the automatic operation time and machining time is large or fluctuates from day to day, search for the cause, warm-up operation, tool change, workpiece or pallet change, automatic chip removal by coolant injection It is possible to take measures to reduce the non-processing operation time such as automatic measurement.

  These time differences ΔT 1, ΔT 2, ΔT 1 + ΔT 2 can also be displayed on the display unit 22. If the machining time counting unit 30 is incorporated in the NC device attached to the machine tool, the machining time and automatic operation time are usually displayed on the display unit 22 of the operation panel 20 which displays the current position of the NC program and the feed axis. The electric on time can be displayed at any time by the operator as needed. As a result, it can be expected that the operator himself will consider the operation rate and productivity of the machine tool on a daily basis.

DESCRIPTION OF SYMBOLS 10 Control apparatus 12 Interpretation part 14 Interpolation part 16 Servo control part 20 Operation panel 22 Display part 30 Machining time counter 32 Code setting part 34 Power-on time counter 36 Automatic operation time counter 38 Machining time counter 40 NC program 100 Machine tool

Claims (3)

In a machine tool controller that drives and controls a machine tool based on an NC program,
A reading / interpreting unit for reading and interpreting the input NC program;
A code setting unit for presetting NC program codes representing the start and end of machining in which material is actually removed from the workpiece of the machine tool;
Counting is started when the NC program code representing the machining start set in the code setting unit is executed in the NC program read and interpreted by the reading interpretation unit, and the counting is performed when the NC program code representing the machining end is executed. A machining time counter that finishes and accumulates machining time;
An automatic operation time counter that counts and integrates the machining time counted by the machining time counter, counts the automatic operation time from receiving the start signal of automatic operation by the NC program until receiving the end signal,
A power on time counter that counts and integrates the automatic operation time counted by the automatic operation time counter, counts the power on time from turning on the machine power of the machine tool to turning off the machine power,
The power-on-time counter, the automatic operation time counter, and the machining time counter are counted and integrated, and the power-on time, automatic operation time, and machining time are arranged in a bar graph. And a display part to be displayed on the operation panel as a bar graph with
A machine tool control device comprising: The display unit includes at least one of a difference between the power-on time and the automatic operation time, a difference between the automatic operation time and the machining time, and a difference between the power-on time and the machining time. The machine tool control device according to claim 1, wherein the difference is displayed. The control panel is connected to the remote control terminal through a communication line, the processing time, power on time and / or automatic operation time according to claim 1 or 2 as to be displayed on the remote operation terminal Machine tool controller.

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