JP2011070295A - Working device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve working efficiency by automatically detecting the break of a working tool and eliminating the need to depress a start button by an operator as usual when the working tool having finished working is not broken. <P>SOLUTION: A working device is provided with a tool detection switch 3 which detects the working tool 5 being elevated and lowered, on a table 1, and also provided with an automatic starting operation box 11 having a switch circuit which outputs an ON/OFF signal as the tool detection switch 3 turns ON/OFF. After working by one working tool is completed, the tool detection switch 3 is positioned at a detection position by movement of the table 1 and the working tool 5 is lowered. At this time, it is determined whether the working tool 5 is broken depending on whether the tool detection switch 3 is depressed, and when the tool detection switch 3 is depressed since the working tool 5 is not broken and then switch circuit outputs the ON/OFF signal, control to automatically move to next working is performed even when the start switch 17 is not turned ON/OFF. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a processing apparatus that performs a plurality of types of processing on a workpiece with a processing tool such as a drill.

  As a conventional processing apparatus, for example, there is an apparatus called a machining center. This processing apparatus fixes a work (workpiece) on a table movable in two plane directions (X and Y directions) and is set in the apparatus in advance. A workpiece is sequentially processed while automatically exchanging a plurality of processing tools such as a drill according to the tool used and the processing procedure (see, for example, Patent Document 1).

JP 2002-11632 A

  In this type of machining, different machining tools may be used to process the same part of the workpiece, but some of the machining tools are expensive, and the machining tool is just before machining with this expensive machining tool. Is broken and remains in the workpiece, the next expensive machining tool will break the expensive machining tool. Therefore, in the conventional machining apparatus, the machine is stopped every time machining with one machining tool is completed, and the operator confirms that the machining tool is not broken and presses the start button provided on the operation panel. However, according to this, even if there is no breakage in the processed tool after the processing, the device can be stopped for each processing and the operator can press the start button. Since this is necessary, there is a problem that work efficiency is lowered.

  An object of the present invention is to solve such a problem.

  Therefore, the present invention stops the apparatus each time machining with one machining tool is finished on a workpiece fixed on a table movable in the X and Y directions, and the start switch is manually switched on and off. In the processing apparatus controlled to automatically change the processing tool by the tool changer and move to the next processing, a tool detection means for detecting the processing tool that moves up and down is provided on the table, and the tool detection means A first switch that is turned on after a first time has elapsed since the detection of the tool, and a second time that is longer than the first time since the tool detection means has been switched on. A switch circuit that outputs an on / off signal by a second switch that is switched off later is provided, and after the machining by one machining tool is completed, the tool detection switch is moved by moving the table. The cutting tool is moved down to the detection position, and it is determined whether or not the machining tool is broken depending on whether or not the tool detection means has detected the machining tool. When an ON / OFF signal is output from the switch circuit by detecting a tool, control is performed so that the next processing is automatically performed even if the start switch is not turned ON / OFF.

  According to the present invention as described above, it is possible to automatically detect the breakage of the machining tool, and when there is no breakage in the machined tool after machining, it is necessary to turn on / off the activation switch by pressing the activation button by the operator as in the past. Therefore, the effect that work efficiency can be improved is obtained.

Schematic front view showing the first embodiment The perspective view which shows the main components of a 1st Example Front view of auto-start operation box Configuration diagram of the switch circuit provided in the automatic startup operation box Flow chart showing the operation of the first embodiment

  Embodiments of a processing apparatus according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic front view showing a first embodiment, FIG. 2 is a perspective view showing main components of the first embodiment, and FIG. 3 is a front view of an automatic start operation box in the first embodiment. In the figure, reference numeral 1 denotes a table. The table 1 is moved in the X direction (left-right direction) and Y direction (front-rear direction) shown in FIG.

  Reference numeral 2 denotes a positioning table provided at the center of the table 1, and the workpiece (workpiece) is positioned and fixed on the positioning table 2. 3 is a push button type tool detection switch as a detecting means for detecting breakage of a machining tool, which will be described later, and is provided at an arbitrary position on the table 1, and when the machining tool is lowered without breaking, The machining tool is detected.

  Reference numeral 4 denotes a main shaft disposed above the table 1, and it is possible to mount and hold a processing tool 5 such as a drill perpendicular to the table 1. The spindle 4 is moved up and down (up and down) in the Z direction (up and down direction) shown in FIG. 1 by a lifting mechanism (not shown), and the processing tool 5 performs a processing operation such as rotation to process a workpiece on the positioning table 2. It has become a thing.

  6 is a tool storage cassette and 7 is a tool changer. The tool storage cassette 6 and the tool changer 7 are arranged side by side on the left side (or right side) of the main shaft 4. Here, the tool storage cassette 6 stores and holds a plurality of different processing tools. The tool changer 7 is provided between the spindle 4 and the tool storage cassette 6, and has a function of automatically changing the machining tool supplied from the tool storage cassette 6 and the machining tool 5 held on the spindle 4 by the tool exchange arm 8. have.

  Reference numeral 9 denotes an operation panel having various buttons such as a setting button, and the operator can set a processing tool to be used and a processing order by operating these buttons. The operation panel 9 is provided with a start button 10 that also functions as a restart button. The start button 10 breaks the machining tool when the apparatus is stopped every time machining with one machining tool is completed. An operator confirms that there is no switch, and an output signal of a later-described start switch (restart switch) that is turned on / off (contact closed, opened) by pressing the start button 10 is sent to a control unit (not shown). Therefore, it is controlled to move to the next processing.

  These configurations are the same as those of the conventional apparatus.

  Reference numeral 11 denotes an automatic start operation box connected to the tool detection switch 3 and the operation panel 9, and an automatic start switching dial 12 for switching between valid and invalid on the front and wiring so that the tool detection switch 3 lights up when the machining tool 5 is detected. A tool detection lamp 13 is provided.

  FIG. 4 is a configuration diagram of a switch circuit provided in the housing of the automatic start operation box 11. As shown in the figure, this switch circuit includes a first switch 14, a second switch 15, and an automatic start change switch 16. They are provided in a sequentially connected form, and are wired so as to straddle the start switch 17 that is turned on and off by pressing the start button 10.

  Here, the first switch 14 is normally kept off (contact open), and after the first time (for example, about 0.5 seconds) has elapsed since the tool detection switch 3 was turned on (contact closed). It is switched on (contact closed). The second switch 15 is connected to the first switch 14, maintains a normal ON (contact closed) state, and is a second time longer than the first time after the tool detection switch 3 is turned ON. After a lapse of a certain time (for example, about 1.0 second), it is switched off (contact closed). The automatic start changeover switch 16 is connected to the second switch 15 and is set to an on or off state by the automatic start changeover dial 12. The switch circuit is valid when on, and the switch circuit is off when off. It becomes invalid.

  FIG. 5 is a flowchart showing the operation of the first embodiment having the above-described configuration, and the following description will be made according to the steps indicated by S in this figure. Note that the operation of each unit described below is controlled by a control unit (not shown) based on a program stored in a storage unit (not shown).

  Now, the automatic start switching dial 12 of the automatic start operation box 11 is operated to be in a valid state, and with this, the automatic start change switch 16 is set to ON, the machining mounted on the spindle 4 according to a preset program. The workpiece 5 is machined by the tool 5, and after the machining is finished, when the spindle 4 is raised to a predetermined position by a lifting mechanism (not shown), the machining tool 5 is inspected for breakage.

  In this inspection, the table 1 is first moved in at least one of the X and Y directions by a drive mechanism (not shown), and the tool detection switch 3 is sent to the tool detection position (S1). As a result, when the tool detection switch 3 comes to a position (tool detection position) immediately below the machining tool 5 mounted on the spindle 4 as indicated by a broken line in FIG. 1, the movement of the table 1 is stopped, and the spindle 4 is illustrated. It is lowered to a predetermined position by the lifting mechanism that does not perform and stops (S2).

  In this lowered position, if the machining tool 5 mounted on the spindle 4 is normal, the tool detection switch 3 is pressed at the tip of the machining tool 5, and the machining tool 5 is broken during the machining. Since the tool detection switch 3 is not pressed when the dimension is short, the control unit determines whether the tool detection switch 3 has been pressed, that is, whether the tool detection switch 3 has detected the machining tool 5. It is determined whether the machining tool is broken or not (S3).

  When the tool detection switch 3 is not pressed, the control unit determines that the machining tool is broken, stops the apparatus, and turns on a warning lamp (not shown) provided on the operation panel 9 so that the operator To report the breakage of the processing tool 5. As a result, the operator exchanges the machining tool 5 and the workpiece, and starts machining from the beginning.

  On the other hand, when the machining tool 5 is normal and the tool detection switch 3 is pressed, that is, when the tool detection switch 3 detects the machining tool 5, the tool detection switch 3 is turned on and provided in the automatic activation operation box 11. The tool detection lamp 13 is turned on. At this time, the switch circuit in the automatic start operation box 11 is set so that the first switch 14 is in the OFF state, the second switch 15 is in the ON state, and the automatic start switch 16 is set in the ON state. The first switch 14 is turned on after a predetermined time from the turning on of the tool detection switch 3, and the second switch 15 is turned off after a predetermined time from the turning on of the first switch 14.

  As a result, the switch circuit in the automatic activation operation box 11 outputs an on / off signal, so that an output signal similar to that when the activation switch 17 is on / off is sent to a control unit (not shown) (S4). Therefore, it is determined that the control unit start switch 17 is turned on and off, and the machining tool supplied from the tool storage cassette 6 and the machining tool 5 held on the spindle 4 are replaced with the tool of the tool changer 7 according to a preset program. The exchange arm 8 automatically exchanges the table 1 and moves the table 1 in at least one of the X and Y directions to position the workpiece at the machining position. Then, the spindle 4 is lowered and the machining tool 5 performs the next process on the workpiece. Is executed (S5).

  After finishing the processing, the control unit determines whether or not there is a next processing step. If there is, the control unit returns to S1, repeats the same operation, and if not, ends the processing operation (S6).

  As described above, in the first embodiment, the apparatus is stopped each time the machining with one machining tool 5 is completed on the workpiece fixed on the table 1 movable in the X and Y directions, and manually. In a machining apparatus that is controlled to move to the next machining when the start switch 17 is switched on and off, a tool detection switch 3 for detecting the machining tool 5 that moves up and down is provided on the table 1, and this tool detection switch The first switch 14 that is turned on after a lapse of a first time after the 3 is turned on and the off after a lapse of a second time longer than the first time after the tool detection switch 3 detects the machining tool 5 A switch circuit 11 for outputting an on / off signal is provided by a second switch that is switched to, and after the machining with one machining tool 5 is completed, the tool detection switch 3 is detected by moving the table 1. Positioning and lowering the processing tool 5, it is determined whether or not the processing tool 5 is broken depending on whether or not the tool detection switch 3 is pressed at that time, and the tool detection switch when the processing tool 5 is not broken. When the on / off signal is output from the switch circuit when 3 is pressed, the machining tool is controlled so as to automatically move to the next machining even if the start switch 17 is not turned on / off. 5 can be automatically detected, and if the machined tool 5 after machining is not broken, it is necessary to turn on and off the activation switch 17 by pressing the activation button by the operator and move to the next machining. Therefore, the effect that work efficiency can be improved is obtained.

  In the embodiment, the push button type tool detection switch 3 is used as the above-described tool detection means. However, a laser sensor, an infrared sensor, or the like that detects the presence or absence of a tool without contact can be used.

DESCRIPTION OF SYMBOLS 1 Table 2 Positioning stand 3 Tool detection switch 4 Spindle 5 Machining tool 6 Tool storage cassette 7 Tool changer 8 Tool change arm 9 Operation panel 10 Start button 11 Automatic start operation box 12 Automatic start change dial 13 Tool detection lamp 14 First switch 15 Second switch 16 Automatic start switch 17 Start switch

Claims (2)

The machine is stopped each time machining with one machining tool is finished on a workpiece fixed on a table movable in the X and Y directions, and machining is performed by a tool changer by turning the start switch on and off manually. In a processing device controlled to automatically change tools and move on to the next processing,
Tool detection means for detecting a machining tool that moves up and down is provided on the table, and a first switch that is turned on after a first time has elapsed since the tool detection means detects the machining tool and the tool detection means, A switch circuit that outputs an on / off signal by a second switch that is switched off after the elapse of a second time longer than the first time after detecting the machining tool;
After the machining by one machining tool is completed, the machining tool is lowered by moving the table to position the tool detection switch at the detection position, and the machining tool is broken depending on whether the machining tool is detected at that time. If the on / off signal is output from the switch circuit when the tool detecting means detects the machining tool, the start switch is automatically turned on / off without being turned on / off. A processing apparatus characterized by controlling to move to the next processing. The processing apparatus according to claim 1,
The processing device is characterized in that the switch circuit is housed in a housing and is wired to an operation panel provided with the start switch and the tool detecting means.

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