JP2003231035A - Machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machine tool capable of performing the manual work on the other machining device part by a worker even when one of the machining device part is in a state of automatic operation, and securing the safety of the worker. <P>SOLUTION: This machine tool body 1 has the left and right machining device parts 3, 4 mounted in a common machining area S covered by a machine body cover 5, and performing the related work. An opening and closing-type intermediate shutter 11, and left and right opening and closing-type front doors 17 are mounted to partition the machining area S into two sectional machining areas S1, S2 respectively corresponding to the machining device parts 3, 4. A close state confirming means 36 is mounted to confirm that the predetermined sectional machining area closing state including the closed state of the front doors 17 and the closed state of the intermediate shutter 11, is satisfied. An interlock means 35 is mounted to inhibit the driving of both machining device parts 3, 4 when one of the left and right front doors 17 is in an opened state. But the interlock means 35 does not inhibit the driving of one of the machining device parts 3, 4 regardless of the opening and closing state of the front doors 17 of the other machining device part 3, 4, when it is confirmed that the sectional machining area close state corresponding to one of the machining device parts 3, 4 is satisfied, by the close state confirming means 36. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool provided with two machining equipment parts such as a facing two-axis lathe, and more particularly to an interlock control thereof.

[0002]

2. Description of the Related Art A facing two-axis lathe includes two spindles whose chuck surfaces face each other and a tool rest corresponding to each spindle. The two machine tool sections each composed of each spindle and the turret are covered with a common machine body cover, and the machining area inside thereof is partitioned into two divided machining areas by an openable intermediate shutter. The reason why the intermediate shutter is provided is to prevent chips and coolant from affecting the other processing equipment parts. Opening and closing the intermediate shutter is
This is because the workpieces are mutually transferred between the spindles on both sides, and the same workpieces are simultaneously gripped by the spindles on both sides when the rod-shaped workpiece is cut off. An openable front door provided on the front surface of the machine body cover is provided for each divided processing area. In such an opposed two-axis lathe, when one of the processing equipment parts is being machined by the automatic operation, for the safety of the operator, no matter whether the left or right front door is open,
Interlocking means are provided to prevent opening and working. When either of the left and right openable front doors is open, both the left and right processing equipment parts cannot be activated because of the interlocking means.

[0003]

In the opposed twin-spindle lathe provided with the interlock means, while one machining equipment unit is in automatic operation and the other machining equipment unit is at rest, the other machining equipment unit is not operating. I cannot work on the department. Therefore, the work such as the manual attachment / detachment of the work to / from the other processing device section and the measurement of the processed work are performed after the completion of the one automatic operation. Therefore, there are problems that the operating rate is low and the production efficiency is low. Further, if the interlock means is removed or turned off, the safety of the worker cannot be secured. Such a problem occurs not only in the facing two-axis lathe but also in a general machine tool having two processing equipment parts.

An object of the present invention is to provide a machine tool in which a worker can work on the other processing equipment unit while the one processing equipment unit is automatically operating, and the safety of the worker can be ensured. It is to be.

[0005]

The structure of the present invention will be described with reference to FIG. 1 corresponding to the embodiment. This machine tool is provided in a common processing area (S) covered with a machine body cover (5), and left and right processing equipment parts (3) and (4) capable of performing work related to each other; An openable / closable intermediate shutter (11) for partitioning the processing area (S) into two independent divided processing areas (S1) and (S2) corresponding to the individual processing equipment parts (3) and (4), and the above-mentioned machine body, respectively. Cover (5)
Front and rear openable front doors (17) that are provided for the above-described divided processing areas (S1) and (S2) and allow workers to enter. In this machine tool, a plurality of open / close detection means (21) to (2) for detecting the open / closed states of the intermediate shutter (11) and the front doors (17), respectively.
3) and the front door (17) are closed and the intermediate shutter (1)
Closed condition confirming means (36) for confirming that a predetermined divided machining area closing condition including that 1) is closed is satisfied.
And an interlock means (35). The interlocking means (35) prohibits driving of both processing equipment parts (3) and (4) when at least one of the left and right front doors (17) is in an open state. When the closing condition confirmation means (36) confirms that the divided processing area closing condition corresponding to either one of the processing equipment units (3) and (4) is satisfied, the other processing equipment unit (3),
It is assumed that the drive of one of the processing equipment parts (3) and (4) is not prohibited regardless of the open / closed state of the front door (17) of (4). According to this structure, normally, when at least one of the left and right front doors (17) is in the open state, the interlocking means (35) causes both processing equipment parts (3),
The driving of (4) is prohibited and the safety of the worker is achieved. However, when the closing condition of one of the divided machining areas (S1), (S2) is confirmed by the closing condition confirmation means (36), the front door (17) of the other machining equipment section (3), (4) is The interlocking means (35) does not prohibit the driving of the one of the processing equipment parts (3) and (4) regardless of the open / closed state, and can be driven. Therefore, even if one of the processing equipment parts (3) and (4) is processing by automatic operation,
With respect to the other processing equipment parts (3) and (4), it is possible to perform manual processing, for example, replacement of the work (W) and inspection of the processed work (W). Therefore, the utilization rate,
The production efficiency can be improved. This front door (17)
The drive is not prohibited in the open state of the one by the closing condition confirmation means (36) by one of the divided machining areas (S1), (S1)
2) the front door (17) is closed and the intermediate shutter (1)
Since it has been confirmed that the predetermined divided machining area closing condition including the closed state 1) is satisfied, the safety of the worker is ensured even if the driving is not prohibited. Therefore, while one of the processing equipment units (3) and (4) is in automatic operation, the other processing equipment units (3) and (4) are manually replaced to start the automatic operation. The operation cycle can be alternately performed in the two processing equipment parts (3) and (4).

In the present invention, the intermediate shutter (1
The intermediate shutter lock means (19) that holds the closed state of (1) and the lock detection means (2) that detects that the intermediate shutter lock means (19) is in the locked state.
4) is provided, and the closing condition confirmation means (36) may include the fact that the lock detection means (24) detects the locked state in the divided machining area closing condition.
Thus, by providing the intermediate shutter lock means (19) for holding the closed state of the intermediate shutter (11),
The intermediate shutter (11) may open unexpectedly when one of the processing equipment units (3) and (4) is automatically operated and the other processing equipment unit (3) and (4) is manually operated. It is prevented and worker's safety is enhanced. Further, since the fact that the intermediate shutter lock means (19) is in the locked state is included in the divided processing region closing condition, the closing confirmation of the intermediate shutter (11) is detected by the open / close detection means (21) to (23). Since the double confirmation is made by the detection of the lock of the detection means (24), the safety for the worker is further enhanced by this. When the intermediate shutter lock means (19) is provided, the lock-on / off means (that locks the intermediate shutter lock means (19) during the automatic operation of one of the processing equipment units (3) and (4) ( Three
It is desirable to provide 7).

The intermediate shutter (11) is, for example, capable of simultaneously gripping the same work (W) by the left and right processing equipment parts (3) and (4) in the opened state. In the case of this configuration, the function as one machine, that is, the work in which the machining area (S) is shared can be automatically performed, and even in such a shared type machine, one of the machining equipment parts (3), (4)
During the automatic operation of (3), manual work can be performed on the other processing parts (3) and (4). When the same work (W) is simultaneously gripped by the left and right processing equipment units (3) and (4), for example, the mutual work (W) is transferred between the left and right processing equipment units (3) and (4). In some cases, it may be parted off.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. This machine tool is composed of a machine tool body 1 and a machine tool control device 2 that controls the machine tool body 1. This embodiment is an example applied to an opposed two-axis lathe. As shown in FIG. 2, the machine tool body 1 is
The left and right processing equipment parts 3 and 4 are provided, and the left and right processing equipment parts 3 and 4 are the common processing area S covered by the machine body cover 5.
It is provided inside.

Each of the processing equipment parts 3 and 4 has a spindle 6 respectively.
And a tool rest 7 for processing the work W gripped by the spindle 6. Each spindle 6 is supported by a spindle stock 9 and has a spindle chuck capable of gripping a work W.
One headstock 9 (on the left side in the figure) is fixedly installed on the bed 8. The other (right side of the figure) headstock 9 is installed on the bed 8 via a rail 9a so as to face the fixed-side headstock 9 and move back and forth, and a headstock advancing / retracting device (not shown). Driven back and forth by. By the movement of the headstock 9, both the processing equipment parts 3 and 4 can perform the work related to each other. As shown in FIG. 3, the work related to each other includes the transfer of the work W between the spindles 6 and 6, and
It is possible to perform processing by gripping the same work W at the same time by the left and right main shafts 6 and 6, for example, parting off of a rod-shaped work. When the rod-shaped workpiece can be machined, the rod-shaped workpiece can penetrate the main shaft 6 on either the movable side or the fixed side. Each turret 7 is composed of a turret, and is installed on a bed 8 via a feed base 10.
The feed base 10 for the fixed-side (left-side) headstock 7 is provided with the tool rest 7 movably in two axial directions of the axial direction (Z-axis direction) of the spindle 6 and the direction (X-axis direction) orthogonal thereto. is doing. The feed table 10 for the movable (right side) headstock 7 is
It is movable only in a direction (X-axis direction) orthogonal to the axial direction (Z-axis direction) of the main shaft 6, and the axial direction Z with respect to the workpiece W is Z.
For the relative feed of, the movement of the headstock 7 is used.

The machine body cover 5 has a common machining area S
An openable / closable intermediate shutter 11 that divides into two independent divided processing areas S1 and S2 corresponding to the individual processing equipment units 3 and 4
Is provided. More specifically, the intermediate shutter 11 partitions the machining area S into left and right together with the fixed partition plate 12, and in the opened state, delivers or simultaneously grips the workpiece W between the spindles 6 and 6 of the left and right machining equipment parts 3 and 4. Is possible (see FIG. 3). As shown in FIGS. 4 and 5, the intermediate shutter 11 is rotatably supported around a fulcrum 14, and is rotationally driven by a shutter opening / closing drive device 15 to open and close. The processing area S is a space above the bottom cover 16 above the bed 8, and the intermediate shutter 11 moves in and out through a slit (not shown) provided in the bottom cover 16.

On the front surface of the machine body cover 5, opening / closing front doors 17 and 17 are provided for the divided processing areas S1 and S2. The front door 17 allows an operator to enter the divided processing areas S1 and S2 in the opened state. This entry may be made as long as the operator can work on the spindle 6 and the tool rest 7. The front doors 17 on both sides are provided such that the front surface of the machine body cover 5 forms a continuous window when both sides are open, and the tips of the front doors 17 abut each other in the closed state. Further, the front door 17 covers the front surface of the processing area S from the front surface to the front portion in the closed state.

A door opening / closing drive device 18 is provided for each front door 17, as shown in FIG. Further, a shutter lock means 19 and a door lock means 20 for holding the intermediate shutter 11 and the front doors 17 in their respective closed states are provided. The shutter lock means 19 and the door lock means 20 are electromagnetic lock devices that are locked and unlocked by driving an electromagnet.
Further, the shutter lock means 19 and the door lock means 20.
Although illustration is omitted, for example, an engaging element driven forward and backward by an electromagnet is engaged with an engaged portion such as a hole or a recess provided in the intermediate shutter 11 and the front door 17, respectively.

For the intermediate shutter 11 and the front doors 17, open / close detection means 21, 22, 23 for detecting the open / closed states of the intermediate shutter 11 and the front door 17, respectively, are provided. These open / close detection means 21, 22, 23
Turns on in the closed detection state, for example. Further, the shutter lock means 19 is provided with lock detection means 24 for detecting that the shutter lock means 19 is in a locked state. The lock detecting means 24 may be provided directly to the shutter lock means 19, or may be provided to the lock on / off means 37 for controlling the shutter lock means 19 as shown in the figure. The lock-on / off means 37 controls the door lock means 20 for each front door 17 in addition to the shutter lock means 19. Further, the lock detecting means 24 is provided with a function of detecting that each door locking means 20 is in a locked state in addition to the shutter locking means 19. The detection signal of the lock state by the lock detection means 24 is individually output to the shutter lock means 19 and each door lock means 20. Although the lock-on / off means 37 and the lock detection means 24 are shown as one in the figure, the lock-on / off means 37 and the lock detection means 24 may be provided separately for the intermediate shutter 11 and each front door 17. good.

A machine tool controller 1 will be described with reference to FIG. The machine tool control device 1 includes a computer-based numerical control device and a programmable controller. The machine tool control device 1 controls the left and right machining equipment parts 3 and 4 by the left and right machining equipment control parts 33 and 34, respectively, and additionally, an interlock means 35 and a closing condition confirmation means 36. , Lock on / off means 3
7 and 7.

The machining equipment control units 33 and 34 are capable of automatically operating the machining equipment units 3 and 4 in accordance with a machining program (not shown), and an operation panel (not shown) provided in the machine tool controller 1. It is possible to switch between automatic operation and manual operation by the operation (d). The two processing equipment control units 33 and 34 send and receive signals to and from each other to perform work related to each other by the left and right processing equipment units 3 and 4, for example, transfer of the work W between the spindles 6 and 6, and both spindles 6 and 6. 6, it is possible to perform a parting process or the like for simultaneously gripping the work W.

The lock-on / off means 37 is means for locking on the shutter lock means 19 when any one of the processing equipment parts 3 and 4 is in automatic operation. This lock-on may be performed unconditionally when any one of the processing equipment units 3 and 4 is in automatic operation. The lock-on / off means 37 controls the door lock means 20 for each front door 17 in addition to the shutter lock means 19. The lock-on / off means 37 locks the door lock means 20 on when the setting conditions are satisfied. The setting conditions are, for example, that the corresponding processing equipment units 3 and 4 are in automatic operation.

The interlock means 35 is a means for prohibiting the driving of the processing equipment parts 3 and 4 according to the open / closed state of the front door 17 and the like, and basically, by the detection signal of each open / close detecting means 22, When it is detected that at least one of the left and right front doors 17 is in an open state, the driving of the processing equipment parts 3 and 4 is prohibited. The prohibition of driving is to forcibly stop the machine tools 3 and 4 which are being driven and to prohibit the machine tool parts 3 and 4 which are not being driven from being activated. The interlock means 35 uses the lock detection signals of the shutter lock means 19 and the door lock means 20 by the lock detection means 24 in addition to the above-mentioned open / closed detection signals to determine whether to prohibit the drive. . More specifically, the interlock means 35 may be any one of the left and right front doors 17 and the intermediate shutters 11 except that the closing condition confirmation means 36 confirms that the divided processing area closing condition is satisfied. When it is open, that is, the opening / closing detection means 2
When there is no closing detection signal for any one of 1, 2, 23, both of the processing equipment parts 3, 4 are prohibited from being driven. As a condition for prohibiting the driving of the interlock means 35, in addition to the above-mentioned conditions, any one of the lock detection signal of the shutter lock means 19 by the lock detection means 24 and the lock detection signal of each door lock means 20 cannot be obtained. In this case, the driving of both the processing equipment parts 3 and 4 may be prohibited. However, also in this case, if the closing condition confirmation means 36 confirms that the divided processing region closing condition is satisfied, the prohibition is not prohibited.

The closing condition confirmation means 36 sets a predetermined divided machining area closing condition that necessarily includes that the front door 17 is closed and the intermediate shutter 11 is closed for each of the two divided machining areas S1 and S2. It is a means of confirming that it has been satisfied. In addition to the above, the closing condition confirmation unit 36 includes the condition that the lock detection unit 24 detects the locked state of the shutter lock unit 19 as the divided processing region closing condition. Front door 17 and intermediate shutter 11
Indicates that the corresponding open / close detection means 21 to 21 are closed.
It is recognized by the detection signal of 23. Closing condition confirmation means 36
Has a left confirmation part 36a and a right confirmation part 36b for confirming the satisfaction of the division processing region closing condition for each of the division processing regions S1 and S2.

When the closing condition confirming means 36 confirms that the condition for closing the divided machining area corresponding to one of the machining equipment parts 3 and 4 is satisfied, the interlock means 35 opens and closes the other front door 17. Regardless, the driving of one of the processing equipment parts 3 and 4 is not prohibited. Interlocking means 35
For the processing equipment parts 3 and 4 for which the closing condition confirmation means 36 has not confirmed that the divided processing area closing condition is satisfied, the driving of the processing equipment parts 3 and 4 is prohibited. For example, front door 1
As for the processing equipment parts 3 and 4 which are open at 7, driving is prohibited. Further, the interlock means 35 also prohibits the driving of the processing equipment parts 3 and 4 in which the lock of the door lock means 20 is not confirmed.

The operation of the interlock and the like having the above configuration will be described. When the closing condition of one of the divided machining areas S1 and S2 is confirmed by the closing condition confirming means 36, the one of the machining devices is irrespective of the open / closed state of the front door 17 of the other machining device unit 3, 4. The drive of the parts 3 and 4 is possible without being prohibited by the interlock means 35. Therefore, even if one of the processing equipment units 3 and 4 is being processed by automatic operation or the like, the front door 17 is opened for the other processing equipment units 3 and 4 to replace the work W or the processed work W. Manual processing such as inspection can be performed. For example, the closing condition of the divided processing area S1 of the processing equipment section 3 on the left side of the drawing is the closing condition confirmation means 3
6, the front door 17 of the processing equipment section 4 on the right side
Even when is open, the driving of the processing device section 3 on the left side can be performed without being prohibited by the interlock means 35. Therefore, during the automatic operation of the processing device unit 3 on the left side, the processing device unit 4 on the right side can be manually processed. Therefore, the operating rate and the production efficiency can be improved.

Further, when it is confirmed by the closing condition confirming means 36 that at least the closing condition in which the front door 17 and the intermediate shutter 11 are closed is satisfied, the driving prohibition by the interlock is not performed. The worker's safety is also secured. In this embodiment, the intermediate shutter 1
Since the intermediate shutter lock means 19 for holding the closed state of No. 1 is provided, when one of the processing equipment units 3 and 4 is automatically operated and the other processing equipment unit 3 and 4 is performing manual work, The shutter 11 is prevented from opening unexpectedly, and the safety of the worker is further enhanced. The lock-on / off means 37 unconditionally puts the intermediate shutter lock means 19 in the locked state while one of the processing equipment units 3 and 4 is in the automatic operation, which also enhances the safety. The closing condition confirming means 36 includes the fact that the intermediate shutter locking means 19 is in the locked state in the divided machining area closing condition.
The closing confirmation of the intermediate shutter 11 is double confirmed by the closing detection of the opening / closing detection means 21 and the lock detection of the lock detection means 24. Therefore, the safety for workers is
Further enhanced.

As described above, since the safety of the worker can be sufficiently ensured, the work W is manually operated with respect to the other processing equipment unit 3 or 4 during the automatic operation of one of the processing equipment units 3 and 4. It is possible to alternately perform the operation cycle in which the two processing equipment units 3 and 4 are replaced with each other and the automatic operation is started.

In each part of this specification, the description "when confirmed" may be replaced with the description "while confirmed". Further, in the above-described embodiment, the case where the machine tool is a facing two-axis lathe has been described. However, the present invention can be applied to various other lathes, and the present invention is not limited to the lathe and includes two processing equipment parts. It can be applied to various machine tools possessed.

[0024]

The machine tool of the present invention is provided in the shared machining area covered with the machine body cover, and the left and right machining equipment parts capable of performing work related to each other, and the machining areas are individually machined. An openable and closable intermediate shutter that divides into two separate processing areas corresponding to the machine parts, and left and right opening and closing provided on the front surface of the machine cover for each of the above processing areas to allow workers to enter. The front door of the ceremony,
A plurality of opening / closing detecting means for detecting the open / closed states of the intermediate shutter and the front doors respectively, and a predetermined divided processing area closing condition including the front door closed and the intermediate shutter closed are satisfied. Closing condition confirmation means for confirming
When at least one of the left and right front doors is in the open state, the driving of both processing equipment parts is prohibited, but the closing condition confirmation means ensures that the divided processing area closing condition corresponding to one of the processing equipment parts is satisfied. When confirmed, the interlocking means that does not prohibit the driving of the one processing equipment section regardless of the open / closed state of the front door of the other processing equipment section is provided, so that one processing equipment section can automatically operate. Even during operation, the worker can work on the other processing equipment portion and the worker's safety can be secured. An intermediate shutter lock means for holding the closed state of the intermediate shutter, and a lock detection means for detecting that the intermediate shutter lock means is in a locked state are provided, and the closing condition confirmation means includes the lock detection means. When the detection of the locked state is included in the above-mentioned divided machining area closing condition, the safety of the worker is further enhanced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a conceptual configuration of a machine tool according to an embodiment of the present invention.

FIG. 2 is a cutaway plan view of a machine tool body of the same machine tool.

FIG. 3 is a fracture explanatory view showing a related work state by the left and right processing equipment parts of the machine tool.

FIG. 4 is an enlarged cutaway side view of the machine tool.

FIG. 5 is an explanatory diagram of a shutter opening / closing operation of the machine tool.

[Explanation of symbols]

1 ... Machine tool body 2 ... Machine tool controller 3, 4 ... Processing equipment 5 ... Airframe cover 6 ... Spindle 7 ... Turret 9 ... Headstock 11 ... Intermediate shutter 12 ... Fixed partition board 15 ... Shutter opening / closing drive device 17 ... Front door 19: Shutter lock means 20 ... Door lock means 21, 22, 23 ... Opening / closing detection means 24 ... Lock detecting means 37 ... Lock-on / off means 33, 34 ... Processing equipment control unit 35 ... Interlocking means 36 ... Closing condition confirmation means 37 ... Lock-on / off means S: Processing area S1, S2 ... Section processing area W ... work

Claims (3)

[Claims] 1. A left and right processing equipment section provided in a common processing area covered with a machine body cover and capable of performing work related to each other, and the processing area is independent for each processing equipment section. An openable and closable intermediate shutter that divides into two divided processing areas, a left and right openable front door that is provided on the front surface of the machine cover for each of the divided processing areas, and allows workers to enter. A plurality of open / close detection means for detecting the open / closed state of the intermediate shutter and the front doors respectively, and a predetermined divided processing area closing condition including that the front door is closed and the intermediate shutter is closed are satisfied. When at least one of the left and right front doors is in the open state, the closing condition confirmation means for confirming prohibits the driving of both processing equipment parts, but the closing condition confirmation means corresponds to either one of the processing equipment parts. Division A machine tool provided with an interlock means that does not prohibit the driving of one of the processing equipment units regardless of whether the front door of the other processing equipment unit is opened or closed when the conditions for closing the processing region are confirmed. 2. An intermediate shutter lock means for holding the closed state of the intermediate shutter, and a lock detection means for detecting that the intermediate shutter lock means is in a locked state, wherein the closing condition confirmation means is The machine tool according to claim 1, wherein the condition that the lock detecting means detects the locked state is included in the divided machining region closing condition. 3. The machine tool according to claim 1, wherein the intermediate shutter allows the same work piece to be simultaneously gripped by the left and right processing equipment parts in the opened state.