JP2001105265A - Device and method of replacing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of a stage difference in a cutting surface of a work by quickly replacing a tool when the residual service life of a tool being used in a machine tool end. SOLUTION: This tool replacing device, if constituted so that selecting a predetermined tool may be selected among tools housed in a tool magazine and may replace, is provided with a service life administrating means for administrating the service life of a tool held in the tool magazine, a service life discriminating means for discriminating whether the service life of the tool used in the machine tool is left or not when a following block to be carried out among the working program carried in the machine tool is 'positioning', and an exchanging means for selecting a spare tool having a service life in the tool magazine for replacement when the service life discriminating means determines that the service life of the tool used in the machine tool is run out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool changing apparatus and a tool changing method for selecting and changing a predetermined tool from a plurality of tools held in a tool magazine.

[0002]

2. Description of the Related Art In a machine tool provided with a tool changing device, a predetermined tool is selected from a plurality of tools held in a tool magazine, and the selected tool is mounted on a main spindle. Is configured to be processed. In addition, since the time available for the machining operation, that is, the life, is determined for each tool, the life of a plurality of tools housed in the tool magazine is managed. When a tool is replaced, a plurality of tools of the same type are configured not to select a tool whose life has expired and to select a tool whose life is remaining.

[0003] As an example of a machine tool provided with a tool changing device having such a configuration, there is a configuration described in Japanese Patent Publication No. 18322/1992. In the configuration of this publication, the remaining life of the tool currently used in the machine tool is constantly monitored, and when the remaining life of the currently used tool is exhausted, the machining operation is interrupted and the tool is replaced. , The machining operation is resumed from the interrupted position.

[0004]

In the case of the above-described conventional tool changer, a tool change may be performed during a cutting operation, for example, during a cutting operation.
Specifically, in an NC program (that is, a machining program) executed by a machine tool, two or more cutting movement blocks may continue, and during the execution of such a cutting movement block, the remaining life of the tool is reduced. Is gone,
At the boundary of the block of the cutting movement, the machining operation (cutting movement) is interrupted to perform the tool change, and after the tool change, the block of the next cutting movement is executed. But,
In this way, if the machining operation of the cutting movement is interrupted halfway,
There was a problem that a step was generated on the cut surface of the workpiece.

[0005] Therefore, an object of the present invention is to make it possible to execute a tool change promptly when the remaining life of a tool used in a machine tool is exhausted, and to generate a step on a cut surface of a workpiece. It is an object of the present invention to provide a tool exchanging device and a tool exchanging method which can prevent the tool exchanging.

[0006]

SUMMARY OF THE INVENTION A tool changer according to the present invention includes a tool magazine for detachably holding a plurality of tools, and selects a predetermined tool from the tools held in the tool magazine. In a tool changer configured to be changed, the tool changer is provided with a life managing means for managing a life of a tool held in the tool magazine, and is executed next to a machining program executed on the machine tool. When the block is in the "positioning" position, it has a life determining means for determining whether or not the life of the tool used in the machine tool is remaining, and the life determining means uses the life of the tool used in the machine tool. When it is determined that there is no remaining tool, an exchanging means for selecting and exchanging a spare tool having a remaining life from the tool magazine is provided.

According to the above configuration, when the remaining life of the tool used in the machine tool is exhausted, tool change is executed when the next block to be executed is “positioning”. For this reason, when the remaining life of the tool is exhausted, tool replacement is promptly performed. And according to the above configuration,
When the block to be executed next is “cutting movement”, the tool change is not executed, that is, there is no need to interrupt the machining operation of the cutting movement and perform the tool change. Therefore, it is possible to reliably prevent the occurrence of a step on the cut surface of the workpiece.

Further, in the case of the above configuration, a storage means for storing a machining interruption position at which machining is interrupted for performing a tool change, and a movement obtained by adding a movement designated by the "positioning" block to the machining interruption position. Preferably, means for calculating a target position is provided. Further, when the next block of the “positioning” block in the processing program is “positioning”, a movement target position obtained by adding the movement specified by the next “positioning” block to the movement target position is obtained. It is even more preferable to provide a means for calculating.

Another tool changer of the present invention is provided with a tool magazine for detachably holding a plurality of tools, and selects and replaces a predetermined tool from the tools held in the tool magazine. In the configured tool changer,
Life management means for managing the life of a tool held in the tool magazine, life judgment means for judging whether or not the life of a tool used in a machine tool is remaining, and machine tool by the life judgment means When it is determined that the life of the tool used in the remaining time is not remaining and the next block to be executed in the machining program executed by the machine tool is not “cutting movement”, the tool magazine is used. And a replacement means for selecting and replacing a spare tool having a remaining life from among them. Also, in the case of this configuration, it is possible to obtain substantially the same operational effects as those of the tool changing device.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First,
FIG. 2 is a diagram showing a schematic configuration of the entire machining center (machine tool) 1 according to the present embodiment. The machining center 1 will be described with reference to FIG. A column 3 is provided on the base 2, and a spindle head 4 is provided on a front surface of the column 3 so as to be movable in a vertical direction. The spindle head 4 is configured to be vertically moved and driven by a vertically moving motor 5 provided on an upper portion of the column 3.

A spindle (not shown) is rotatably provided inside the spindle head 4, and a tool 6 is removably mounted on a lower end of the spindle. The spindle and the tool 6 are configured to be rotationally driven by a spindle motor 7 provided above the spindle head 4.

Below the spindle head 4, there is provided a work table 8 for mounting and fixing a work (not shown) in the XY direction.
It is provided movably in the direction. The work table 8 includes an X-axis motor 9 (see FIG. 4) and a Y-axis motor
(See FIG. 4) so as to be driven to move in the XY directions.

A tool magazine 11 for detachably storing and holding a plurality of (for example, eight) tools 6 is provided on a side portion of the spindle head 4. As shown in FIGS. 3A and 3B, the tool magazine 11 has, for example, eight tool pots 12 arranged in an annular shape, and stores the tools 6 in the tool pots 12, respectively. Is held. The tool pot 12 is configured to be conveyed in an annular tool path 14 by a magazine motor 13. By this transport operation, the tool pot 12 and thus the tool 6 are positioned at the tool indexing section, that is, are configured to be rotationally indexed.

When the tool change is performed, the spindle head 4 is moved upward by driving the vertical movement motor 5 and retracted, and the spindle motor 7 is driven to execute the spindle orientation. Subsequently, the magazine motor 13
Is driven to store the tool 6 to be exchanged.
Is rotationally indexed (conveyed) so as to be positioned at the tool indexing section.

Next, by driving the rocking motor 15 to operate a rocking mechanism (not shown), the rotation-indexed tool pot 12 is rocked downward, and at the tool change position (NP). The tool can be removed downward. Then, when the tool exchanging motor 16 is driven to operate the exchanging arm 17, the tool 6 attached to the lower end of the main shaft and the tool 6 stored in the tool pot 12 at the tool exchanging position (NP) are set. And are exchanged. Thereafter, the tool pot 12 storing the tool 6 used so far is swung upward by operating the swing mechanism, so that the tool 6 faces in the horizontal direction. Thus, the tool change operation is completed.

Next, the numerical controller 18 for controlling the driving of each motor of the machining center 1 will be described with reference to FIG. As shown in FIG. 4, the numerical controller 1
Reference numeral 8 denotes a master CPU 19 that controls the entire operation of the machining center 1, a slave CPU 20 that controls the operation of workpiece machining, and an automatic tool change CPU (hereinafter, referred to as an ATC unit CPU) 21 that controls the operation of automatic tool change. It is composed mainly of three CPUs. The numerical controller 18 has the functions of a life managing unit, a life determining unit, and a replacing unit of the present invention.

The master CPU 19 is connected to a master ROM 22, a first RAM 23, and a second RAM 24. Master RO
M22 stores a program for operating the control device itself, data such as various constants, and the like. The first master unit RAM 23 is configured to temporarily store data such as variables and flags during control execution. Second
The master RAM 24 stores machining programs (NC programs) and data such as a tool information table for managing tool information such as the life remaining in each tool 6 stored in the tool magazine 11. It is configured as follows. The second master unit RAM 24 is configured to be backed up when the power is turned off.

The slave CPU 20 is connected to a slave ROM 25 and a slave RAM 26. The slave unit ROM 25 stores data such as a motor drive program for work machining and various constants. The slave unit RAM 26 temporarily stores data such as variables and flags during execution of the work machining control.

Further, the ATC section CPU 21 is connected to an ATC section ROM 27 and an ATC section RAM 28. The ATC ROM 27 stores data such as an exchange arm drive program for tool exchange and various constants. The ATC RAM 28 is configured to temporarily store data such as variables and flags during execution of the exchange control.

The master CPU 19 and the slave CP
A common RAM 29 between MSs is connected to U20. The MS common RAM 29 has a master CPU
Data such as a command from the server 19 to the slave CPU 20 or a command in the opposite direction and information are stored. The MS-to-MS common RAM 29 includes a master CPU 19 and a slave C
Data is written from both of the PUs 20 and data is read by both CPUs. Similarly, the master CPU 19 and the ATC unit CPU
A common RAM 30 between MAs is connected to the RAM 21.

Further, a keyboard 31 and a CRT 32 are connected to the master CPU 19. The keyboard 31 allows input of data such as a machining program and a tool information table. The above CRT
32 is configured to display the input machining program, information on the life of the tool, operation information, and the like. Further, the master CPU 19 has a vertical position sensor 3 for detecting the vertical absolute position of the spindle head 4.
3 are connected.

On the other hand, an X-axis motor 9 and a Y-axis motor 10 are connected to the slave CPU 20. Slave CP
The U20 is configured to send a control signal to the X-axis motor 9 and the Y-axis motor 10 to drive and control them. Thereby, the position of the work table 8 and the work (workpiece) attached to the work table 8 is X
It is changed in the Y direction. Further, the vertical movement motor 5 and the spindle motor 7 are connected to the slave CPU 20. The slave CPU 20 is configured to send a control signal to the vertically moving motor 5 and the spindle motor 7 to drive and control them. As a result, a machining operation using a predetermined tool is performed on the work.

Further, the ATC unit CPU 21 has a magazine motor 13, a swing motor 15, a tool change motor 16
And are connected. The ATC unit CPU 21 sends a control signal to the magazine motor 13 to drive and control the magazine motor 13 to execute tool indexing, and sends a control signal to the swing motor 15 to drive and control the swing mechanism, thereby causing the swing mechanism to operate. It is configured to operate and send a control signal to the tool changing motor 16 to control the driving thereof, thereby executing the tool changing.

On the other hand, FIG. 5 shows a specific configuration of a tool information table TB which stores information on the life of the plurality of tools 6 stored in the tool magazine 11. As shown in FIG. 5, the tool information table TB contains the second master unit RA.
Stored in M24, and three areas AR1, AR
2, AR3. The area AR1 is a command tool area in which a specified tool number Tprog specified on the machining program is stored.

The area AR2 indicates the correspondence between the pot number Pn and the tool number Tn. The area AR2 contains information indicating the number of the tool 6 and the number of the tool 6 stored in each of the tool pots 12 of the tool magazine 11. Data is stored.
This area AR2 is called a magazine tool setting area.
Main tool information Qm is stored in the rightmost column of the magazine tool setting area AR2. This main tool information Qm
Is data indicating a tool designated as a main tool for each tool 6 when the tool is present. For example, the tool with the tool number 60 stored in the tool pot with the pot number 7 is a spare tool with the tool number 2 as the main tool. It should be noted that a tool without a designated main tool indicates that the tool itself is the main tool.

An area AR3 is a tool life management area, and stores data indicating the number of minutes of life remaining for a tool with a tool number. Master CPU
Reference numeral 19 is configured to perform a process of subtracting the actual use time from the remaining life for each tool 6 used for machining, and sequentially rewrite the data content of the tool life management area AR3.

FIGS. 1 and 6 show the control of the operation of the machining center 1 described above, in particular, the operation when the tool is changed during the execution of the machining program.
The description will be made with reference to FIG. The flowchart of FIG. 1 shows the contents of the control executed by the master CPU 19 of the numerical controller 18. FIG. 6 shows a part of a machining program executed by the machining center 1.

When the operation control of the machining center 1 is started, first, step S1 in FIG. 1 is executed, and it is determined whether or not the next block is present in the machining program executed in the machining center 1. If there is no next block, the process proceeds to "NO" in step S1, and the operation control ends. On the other hand, if there is the next block, the process proceeds to "YES" in step S1, and the instruction of the next one block is interpreted (step S2).

Then, the block interpreted above is "G
"0", that is, "positioning" (step S3). Here, when the block is not "positioning", the process proceeds to "NO" in step S3, and the contents such as the instruction of the block are executed (step S11). After executing step S11,
The process returns to step S1.

On the other hand, if the interpreted block is "positioning" in step S3, the process proceeds to "YES" to determine whether the life of the tool 6 currently in use has expired (step S4). Here, if the life of the tool 6 in use has not expired (that is, the life is remaining), the process proceeds to “NO” in step S4, and the process proceeds to step S4.
Then, the process proceeds to step 11 to execute the block, that is, "positioning".

On the other hand, if the life of the tool 6 in use has expired (ie, the life has not expired), the process proceeds to "YES" in step S4, and the next tool, that is, the tool in use It is determined whether there is a spare tool (a tool of the same type) as a tool (step S5). Here, if there is a spare tool, the process proceeds to "YES" in step S5, and proceeds to step S6 to exchange the tool mounted on the spindle with the spare tool and to stand by at the tool exchange position. . At this time, a position obtained by adding the movement amount designated by the "positioning" block to the machining interruption point (position) is set as a movement target position, and the calculated movement target position is used as the first master unit RAM.
23 or the second master unit RAM 24. In this case, the first master unit RAM 23
Alternatively, the second master unit RAM 24 constitutes a storage unit of the present invention.

On the other hand, if there is no spare tool in step S5, the process proceeds to "NO", the process proceeds to step S12, an alarm is generated, and the operation of the machining center 1 is temporarily stopped. . By the occurrence of this alarm, the worker can recognize that an abnormality (specifically, an abnormality that the service life of the tool has expired and there is no spare tool) has occurred, and it is possible to take measures against it. . Then, after the above abnormality is eliminated, the operation can be resumed from the temporary interruption point.

After executing the tool change in step S6, the flow advances to step S7 to interpret the next block in the machining program (ie, the block next to the "positioning" block). Subsequently, it is determined whether the interpreted block is “G0”, that is, “positioning” (step S8). If the interpreted block is not “positioning”, “NO” is determined in step S8.
To move to the stored movement target position (step S10). Then, the process returns to step S3. Here, since the interpreted block is not “positioning”, the process proceeds to “NO” in step S3, and proceeds to step S11.
To execute the contents such as the instruction of the block.

On the other hand, if the interpreted block is "positioning" in step S8, the process proceeds to "YES" to move the stored movement target position to the movement amount designated by the "positioning" block. Is set as the movement target position, and the movement target position is stored (step S9). After that, the process returns to step S7, and the above-described processing is repeatedly executed.

Now, when the machining program to be executed in the machining center 1 is, for example, a program as shown in FIG. 6, an operation when the life of the tool is lost during the machining operation will be specifically described. In FIG. 6, the numbers at the right end indicate the numbers of the blocks of the machining program.

In the machining program of FIG. 6, blocks 1, 2, and 3 are blocks for "cutting movement". Therefore, for example, if the life of the tool 6 being used has expired during the execution of the block 1, since the blocks 2 and 3 are "cutting movement", that is, not "positioning", the steps in FIG. The process proceeds to “NO” in the determination of S3,
It operates so that the "cutting movement" of blocks 2 and 3 is performed, and no tool change is performed.

Thereafter, since block 4 is "G0 (positioning)", when this block 4 is interpreted,
It is determined that the life of the tool has expired, and the process proceeds to “YES” in steps S4 and S5 in FIG. 1 to execute tool replacement. Then, after the tool change, the process waits at the tool change position without returning to the machining interruption point. In this case, a position obtained by adding the movement amount designated by the “positioning” block (block 4) to the machining interruption point is stored as a movement target position.

Next, block 5 is interpreted. Since this block 5 is also “G0 (positioning)”, the process of updating the movement target position without moving the spindle (step S in FIG. 1)
Perform 9). Subsequently, block 6 is interpreted. Since this block 6 is also “G0 (positioning)”, a process of updating the movement target position without moving the spindle (step S9 in FIG. 1) is performed.

Thereafter, block 7 is interpreted. Since this block 7 is a “cutting movement” block and is not “G0 (positioning)”, “NO” in step S8 of FIG.
The process proceeds to step S10, and the spindle is moved to the stored movement target position. In this case, when moving the main shaft to the movement target position, first, the main shaft is moved in the XY-axis directions to position the XY-axis. continue,
It is configured to move in the Z-axis direction to perform Z-axis positioning.

By moving in this manner, interference between the work and the tool is prevented. Further, in the above configuration, since the movement of the G0 block after the tool change is performed collectively, after returning to the machining interruption point once after the tool exchange, the movement amount specified by the G0 block from the machining interruption point is set. The time required for the movement can be reduced as compared with the configuration in which only the movement is performed.

According to this embodiment having such a configuration, when the remaining life of the tool used in the machining center 1 is exhausted, the tool change is executed when the next block to be executed is "positioning". You. For this reason, when the remaining life of the tool is exhausted, tool replacement is promptly performed.
According to the above configuration, when the block to be executed next is “cutting movement”, even if the remaining life of the tool used in the machining center 1 has expired, tool replacement is not executed, that is, cutting movement is not performed. There is no need to interrupt and change tools. Therefore, unlike the conventional configuration, it is possible to reliably prevent the occurrence of a step on the cut surface of the work (workpiece).

In the above embodiment, G0 after the tool change is performed.
The moving amount of the block is calculated and summarized, and then the block is moved once. For this reason, after returning to the machining interruption point once after the tool exchange, the operation is performed to move from this machining interruption point by the movement amount specified in the G0 block after the tool exchange, that is, the movement is performed twice or more. The time required for movement can be reduced as compared with the configuration in which the processing is executed.

FIGS. 7 and 8 show a second embodiment of the present invention, and the points different from the first embodiment will be described. The same parts and steps as those of the first embodiment are denoted by the same reference numerals and the same step numbers.
In the above-described first embodiment, after the tool change, if the next block is not the “G0” block, the main spindle is moved to the movement target position. However, instead of this, in the second embodiment, After the tool change, even if the next block is not the “G0” block, the main spindle is not moved to the movement target position unless the next block is the “cutting movement” block.

Specifically, as shown in FIG. 7, step 21 is inserted between step 2 and step 3, and in this step S21, it is determined whether or not the tool change return flag is set. I do. Here, when the in-tool-change return flag is not set, the process proceeds to "NO" in step S21, and proceeds to step S3. Then, after executing steps S3, S4, S5, and S6 in order, that is, after exchanging a spare tool, the process proceeds to step S22, and a tool exchange returning flag is set. Thereafter, the process returns to step S1.

On the other hand, if it is determined in step S21 that the tool change in-return flag is set, "YES"
The process proceeds to step S23, and it is determined whether or not the next block is a "cutting movement" block. Here, when the next block is the "cutting movement" block, the process proceeds to "YES" in step S23, and moves to the movement target position (that is, returns to the return position) (step S23). S24). Then, the process proceeds to step S25,
Clear the tool change return flag. Thereafter, the process proceeds to step S11, and the next block, that is, “cutting movement”
The block is configured to execute.

On the other hand, if the next block is not the "cutting movement" block in step S23, the process proceeds to "NO", and proceeds to step S8 to determine whether or not the next block is a "positioning" block. . If the next block is the "positioning" block, the process proceeds to "YES" in step S8, and the movement amount specified by the "positioning" block is added to the stored movement target position. The moved position is set as the movement target position, and the movement target position is stored, that is, the movement target position is updated (step S9). And it is comprised so that it may return to step S1.

If it is determined in step S8 that the next block is not a "positioning" block, that is, if the next block is neither a "positioning" block nor a "cutting movement" block, the process proceeds to "NO" and step S11 is performed.
To execute the contents such as the instruction of the block. The configuration of the second embodiment other than that described above is the same as the configuration of the first embodiment.

Now, in the second embodiment, when the machining program to be executed in the machining center 1 is, for example, a program as shown in FIG. Will be described. In FIG. 8, the rightmost numeral indicates the number of the block of the machining program.

In the machining program of FIG. 8, it is assumed that when the block 2 (that is, the G0 (positioning) block) is interpreted, it is determined that the life of the tool has expired, and the tool is changed. In this case, after the tool change, the process stands by at the tool change position without returning to the machining interruption point. At this time, a "positioning" block (block 4) is set at the machining interruption point.
Is set as a movement target position, and the movement target position is stored.

Next, block 3 is interpreted. Since the block 3 is not "G0 (positioning)", in the case of the first embodiment, the block 3 is moved (that is, returned) to the movement target position in which the spindle is stored. In contrast, the second
In the case of the embodiment, the interpreted block 3 is "G
0 (positioning) "and not a" cutting movement "block, the process proceeds to" NO "in step S23 and" NO "in step S8 in FIG. 7 without moving the spindle.
Instructions of block 3 interpreted above (specifically, "M8"
, Which is not a move command).

Subsequently, block 4 is interpreted. Since this block 4 is “G0 (positioning)”, only the process of calculating and updating the movement target position (step S9 in FIG. 7) is performed without moving the spindle. Thereafter, block 5 is interpreted. Since this block 5 is a “cutting movement” block and is not “G0 (positioning)”, the process proceeds to “YES” in step S23 of FIG. 7 and proceeds to step S24, where the main axis is stored. Move to the target position.

According to the second embodiment having such a configuration,
It is possible to obtain substantially the same operation and effect as in the first embodiment.
In particular, in the second embodiment, even if the next block is not a “G0” block after the tool change, and if the next block is not a “cutting movement” block, the main spindle is not moved to the movement target position. After the replacement, when the next block is not the “G0” block and is not the “cutting movement” block, it is possible to prevent the main spindle from being moved to the movement target position. Thus, in the second embodiment, the movement amounts of all the G0 blocks after the tool change can be calculated and put together, and the movement of the spindle can be completed once before the first cutting movement after the tool change. Can be done. Thereby, the time required for the movement can be reduced.

In each of the above embodiments, when the next block to be executed in the machining program executed by the machining center 1 is “positioning”, the life of the tool used in the machining center 1 remains. It is configured to judge whether or not the tool has no remaining life, and when the tool is judged to have no remaining life, the spare tool having the remaining life is selected from the tool magazine 11 and replaced. Instead, it is first determined whether or not the life of the tool used in the machining center 1 is remaining, and when it is determined that the life of the tool is not remaining,
When the next block to be executed in the machining program executed in step 1 is not “cutting movement”, the tool magazine 11
May be configured to select and replace a spare tool that has a remaining life from among them. Even with this configuration,
Approximately the same operation and effect as those of the above embodiments can be obtained.

[0054]

As is clear from the above description, the present invention is used in a machine tool when the next block to be executed in the machining program executed in the machine tool is "positioning". It is determined whether or not the tool life is remaining, and when it is determined that the tool life is not remaining,
Since the spare tool with the remaining life is selected and replaced from the tool magazine, if the remaining life of the used tool is exhausted, the tool can be replaced promptly. An excellent effect is obtained that a step can be prevented from occurring on the cut surface of the workpiece.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a machining center.

3A is a front view of the tool magazine, and FIG. 3B is a side view of the tool magazine.

FIG. 4 is a block diagram.

FIG. 5 shows the contents of a tool information table.

FIG. 6 is a diagram showing an example of a machining program.

FIG. 7 is a view corresponding to FIG. 1, showing a second embodiment of the present invention;

FIG. 8 is a diagram corresponding to FIG. 6;

[Explanation of symbols]

1 is a machining center (machine tool), 4 is a spindle head,
5 is a vertical motor, 6 is a tool, 7 is a spindle motor, 8 is a work table, 9 is an X-axis motor, 10 is a Y-axis motor, 1
1 is a tool magazine, 12 is a tool pot, 13 is a magazine motor, 15 is a swing motor, 16 is a tool change motor, 1
8 is an electronic control unit (life management means, life judgment means, replacement means), 19 is a master CPU, and 20 is a slave CP.
U and 21 denote ATC unit CPUs, 31 denotes a keyboard, 32 denotes a CRT, and 33 denotes a vertical position sensor.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3C002 AA03 BB06 FF03 GG03 HH01 HH07 5H269 AB01 AB31 BB03 BB11 CC02 CC17 EE03 EE08 EE11 EE13 EE14 GG08 GG09 JJ01 KK01 PP02 QB01 QB15 QB17 QC01 QD03 QE

Claims (6)

[Claims] 1. A tool changer comprising: a tool magazine for detachably holding a plurality of tools; and a tool changer configured to select and change a predetermined tool from tools held in the tool magazine. A life managing means for managing the life of the tool held in the tool magazine; and a tool used in the machine tool when the next block of the machining program executed in the machine tool is "positioning". Life determining means for determining whether or not the life of the tool used is remaining, and when the life determining means determines that the life of the tool used in the machine tool is not remaining, the tool magazine And a replacement means for selecting and replacing a spare tool having a remaining life from the tool. 2. A storage means for storing a machining interruption position at which machining is interrupted for performing a tool change, and calculating a movement target position obtained by adding a movement specified by the "positioning" block to the machining interruption position. 2. A tool changer according to claim 1, further comprising means. 3. When the block next to the “positioning” block in the processing program is “positioning”, a movement obtained by adding a movement specified by the next “positioning” block to the movement target position. 3. The tool changer according to claim 2, further comprising means for calculating a target position. 4. A tool changer comprising a tool magazine for detachably holding a plurality of tools, wherein a predetermined tool is selected from the tools held in the tool magazine and replaced. Life management means for managing the life of a tool held in the tool magazine; life determination means for determining whether or not the life of a tool used in the machine tool is remaining; When it is determined that the life of the tool used in the remaining time is not remaining and the next block to be executed in the machining program executed by the machine tool is not “cutting movement”, the tool magazine is used. And a replacement means for selecting and replacing a spare tool having a remaining life from among the tools. 5. A tool exchanging method for selecting a predetermined tool from a tool magazine for detachably holding a plurality of tools and exchanging the selected tool, wherein a life of the tools held in the tool magazine is managed, and When the next block to be executed in the machining program executed on the machine is `` positioning '', it is determined whether the tool used on the machine tool has the remaining life and used on the machine tool. A tool replacement method wherein, when it is determined that the service life of the used tool is not remaining, a spare tool having a service life remaining is selected from the tool magazine and replaced. 6. A tool exchanging method for selecting and exchanging a predetermined tool from a tool magazine for detachably holding a plurality of tools, the method comprising: managing a life of a tool held in the tool magazine; Judgment whether the life of the tool used in the machine is remaining or not, and when it is judged that the life of the tool used in the machine tool is not remaining, The next block to be executed in the program is "cutting movement"
A tool replacement method wherein a spare tool having a remaining life is selected from the tool magazine and replaced.