WO2023112134A1

WO2023112134A1 - Machine tool

Info

Publication number: WO2023112134A1
Application number: PCT/JP2021/046000
Authority: WO
Inventors: 揚子岩井; 数善幸村; 裕也大塚; 奈緒美廣田; 太智中川
Original assignee: 株式会社Fuji
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2023-06-22

Abstract

Provided is a machine tool that can be positioned at a tool replacement position that corresponds with a tip attachment state when a cutting tool held by a turret is positioned at the tool replacement position.　This machine tool comprises: a workpiece-holding device that holds a workpiece and rotates about a main axis; a turret to which is attached a cutting tool on which a tip can be mounted and removed, the turret executing a process on the workpiece using the tip; a slide device that causes the turret to move in a sliding manner in each of a first direction parallel to the main axis and a second direction perpendicular to the first direction; a rotation device that rotates the turret; and a control unit. The control unit has: a determination unit that determines whether or not an end-of-service-life tip, which is a tip that needs to be replaced, is present among tips attached to the cutting tool held by the turret; and a position adjustment unit that, when the determination unit determines that an end-of-service-life tip is present, controls the slide device to position the end-of-service-life tip at a tool replacement position and adjusts the tool replacement position in accordance with the position on the turret where the end-of-service-life tip is held.

Description

Machine Tools

This disclosure relates to the replacement position of the tip of the machine tool.

Conventionally, various proposals have been made for machine tools that machine workpieces using tools held in a turret. For example, the machine tool disclosed in Patent Document 1 below includes a so-called slant-type bed, and moves a turret along the inclined surface of the bed. A machine tool indexes a tool to be used from among a plurality of tools held on a turret, and executes machining on a workpiece using the indexed tool.

JP 2017-196682 A

The above-described turret, for example, is provided with tool mounting portions at predetermined rotational angles in the rotational direction, and a cutting tool for machining a workpiece is mounted on each of the plurality of tool mounting portions. When a predetermined number of machining operations are performed and the tip of the cutting tool wears out, it becomes necessary to replace the tip. The mounting position of the chip varies depending on the shape to be processed. For this reason, if the same exchange operation is performed uniformly, the tool exchange positions for exchanging the tip will be scattered, and there is a risk that the burden of the tip exchanging operation will increase.

The present disclosure has been made in view of the above problems, and provides a machine tool capable of arranging a cutting tool held by a turret at a tool change position according to the mounting state of the chip. intended to

In order to solve the above problems, the present specification provides a workpiece holding device that holds a workpiece and rotates around a spindle, and a cutting tool that has a detachable tip, and performs machining on the workpiece with the tip. a turret, a slide device for sliding the turret in a first direction parallel to the main axis and a second direction perpendicular to the first direction, and rotating the turret about a rotation axis along the first direction and a control unit, wherein the turret is provided with tool mounting portions at predetermined rotation angle intervals in the direction of rotation, and the cutting tool can be mounted on each of the plurality of tool mounting portions. wherein the control unit includes a judgment unit for judging whether or not there is an end-of-life insert, which is the insert that needs to be replaced, among the inserts attached to the cutting tool held by the turret; When the judging unit determines that the life chip exists, the slide device is controlled to place the life chip at the tool change position, and the tool change position is determined according to the holding position of the life chip in the turret. A machine tool is disclosed having a position adjuster for adjusting the .

According to the machine tool of the present disclosure, the tip is attached to different attachment positions depending on the shape of the cutting tool attached to the tool attachment portion. When there is a life chip that needs to be replaced, the control unit places the life chip at the tool change position. At this time, the control unit adjusts the tool change position according to the holding position of the end-of-life chip on the turret. As a result, it is possible to perform desired machining on the workpiece by inserts attached at different positions, and to adjust the tool changing position according to the holding position. By adjusting the tool change position, the work efficiency of the change work can be improved.

1 is a perspective view of a machine tool according to a first embodiment; FIG. FIG. 2 is a perspective view of the machine tool with the main body cover removed; A block diagram of a machine tool. Enlarged view of the turret with the tip attached. A flow chart of cutting tool exchange processing. FIG. 4 is a schematic diagram showing a state in which the position of the tool change position in the Z-axis direction is adjusted; The figure which shows the machine tool of 2nd Example. The figure which shows the machine tool of 3rd Example. The figure which shows the machine tool of 4th Example.

An embodiment embodying the machine tool of the present disclosure will be described below with reference to the drawings. FIG. 1 shows a perspective view of a machine tool 10 of the first embodiment as seen from the front side. FIG. 2 shows the machine tool 10 with the device cover 15 removed. 2 shows a state in which some members such as a chuck mechanism 12 (see FIG. 1) and

tips

60B and 63B (see FIG. 4), which will be described later, are not attached. As shown in FIGS. 1 and 2, the machine tool 10 is a so-called NC lathe, and includes a main spindle device 11 having a main shaft along the machine body width direction (Z-axis direction) and a chuck mechanism 12 of the main spindle device 11 (see FIG. 2). 1) is provided with a turret device 13 (see FIG. 2) for machining a workpiece (not shown) chucked in the machine. In the following description, as shown in FIGS. 1 and 2, the direction along the main shaft of the spindle device 11 is the Z-axis direction, and the direction perpendicular to the Z-axis direction moves the turret device 13 along a guide surface 20 described later. is referred to as the X-axis direction, and the direction perpendicular to the X-axis direction and the Z-axis direction is referred to as the Y-axis direction. For convenience of explanation, the Z-axis direction, which is the width direction of the machine and is horizontal to the installation surface of the device, may be referred to as the left-right direction with reference to the direction in which the machine tool 10 is viewed from the front.

Each device such as the spindle device 11 and the turret device 13 is placed on a bed 14 serving as a base and covered with a device cover 15 . A slide door 15A is provided in the center of the front surface of the device cover 15 . The slide door 15A slides in the left-right direction to open and close the center of the front surface of the device cover 15. As shown in FIG. A processing chamber for processing a work is formed in the device cover 15 with the slide door 15A opened. The user can access the processing chamber by opening the slide door 15A, and can perform work loading and unloading. Further, the user can replace the contact metal 12A and the child claws 12B of the chuck mechanism 12 by opening the slide door 15A. Further, the user can replace the

tips

60B and 63B (see FIG. 4) of the

cutting tools

60 and 63 attached to the turret device 13 by opening the slide door 15A. FIG. 1 shows a state in which the slide door 15A is open. The opening and closing of the slide door 15A may be performed manually by the user, or may be performed automatically by the machine tool 10 . Also, the loading and unloading of workpieces and the replacement of

chips

60B and 63B may be performed manually by the user or may be performed by a robot.

A control panel 16 is provided on the right side of the slide door 15A on the front surface of the device cover 15 . FIG. 3 shows a block diagram of the machine tool 10. As shown in FIG. As shown in FIGS. 1 and 3, the operation panel 16 includes a control section 17, a storage device 18, and an operation section 19. FIG. The control unit 17 is a processing device mainly composed of a computer including a CPU and the like, and executes numerical control and sequence control to comprehensively control the operation of the machine tool 10 . The control unit 17 is electrically connected to each device (turret device 13, etc.) of the machine tool 10, and is capable of controlling the operation of each device. The storage device 18 includes, for example, RAM, ROM, flash memory, hard disk, and the like. The storage device 18 stores various control data 18A.

The control data 18A includes, for example, data such as a program for controlling the operation of the spindle device 11 and the turret device 13, the type of work to be produced, the type of tool used for work, and the position of the tool relative to the work during work. there is The program referred to here is, for example, a sequence control program (ladder circuit), an NC program, or the like. The control data 18A also contains a program for executing a cutting tool replacement process shown in FIG. 5, which will be described later. A program is set for arranging the life chip at the tool change position where the life chip is to be replaced. Threshold data (threshold number of times described later) for determining the number of times of use of the

cutting tools

60 and 63 to which the

tips

60B and 63B are attached is set in the control data 18A. The control data 18A also stores a plurality of types of NC programs corresponding to the relative holding positions (cutting tools 60, 63) of the

chips

60B, 63B in the turret 43. FIG. The control unit 17 executes control based on this program, and arranges the life chip at the tool change position. In the following description, the fact that the control unit 17 executes the program of the control data 18A to control each device may be simply referred to as the device name. For example, "the turret 43 rotates" means that "the control unit 17 executes the program of the control data 18A to control the turret servomotor 47 (see FIG. 3), and the turret servomotor 47 is driven to rotate the turret 43. rotates”.

The operation unit 19 is a user interface, and includes, for example, a touch panel 19A and operation switches 19B. The operation unit 19 changes the display content of the touch panel 19A and the lighting state of the lamp provided in the operation unit 19 based on the control of the control unit 17 . Further, the operation unit 19 outputs a signal to the control unit 17 according to an operation input to the touch panel 19A or the operation switch 19B. Note that the operation unit 19 may be configured without the touch panel 19A and the operation switches 19B.

Also, as shown in FIG. 2, the machine tool 10 is, for example, a turret lathe in which the A-axis, which is the rotation axis of the turret device 13, is parallel to the Z-axis direction. The bed 14 is formed with a box-shaped chip collection section 14A that is open upward, and collects chips generated by machining the workpiece into the chip collection section 14A. Further, the bed 14 is of a slant type having a guide surface 20 inclined toward the chip collection section 14A in front of the apparatus.

The spindle device 11 is fixed to the bed 14 and has a chuck mechanism 12 (see FIG. 1), a headstock 21 and a drive device 23 . The chuck mechanism 12 is attached to the tip of the headstock 21 and arranged above the scrap collector 14A in the machining chamber (see FIG. 1). The chuck mechanism 12 can be attached with, for example, three child claws 12B. The child claw 12B is opened and closed according to the supply amount. The chuck mechanism 12 rotates around the main shaft while chucking a work placed on the contact metal 12A with three child claws 12B. The spindle device 11 is not limited to a structure in which the headstock 21 and the like are fixed, and may be structured such that the headstock 21 and the like slides relative to the bed 14 in the Z-axis direction or the like.

A spindle (not shown) is rotatably supported inside the headstock 21 by bearings. A chuck mechanism 12 (see FIG. 1) is attached to one end side (turret device 13 side) of the spindle in the Z-axis direction, and a spindle side pulley 27 is attached to the other end side. The driving device 23 has a servomotor 29 and a timing belt 31 . The servomotor 29 functions as a drive source for rotating the main shaft, and its rotation operation is controlled based on the control of the control section 17 . The timing belt 31 is stretched over a motor-side pulley 33 attached to the output shaft of the servomotor 29 and the spindle-side pulley 27 . As a result, the rotational force of the servomotor 29 is transmitted to the main shaft via the timing belt 31 and rotates according to the rotation of the servomotor 29 . The control unit 17 controls the rotational speed, rotational position, etc. of the main shaft by numerical control or the like based on the rotational position information of the encoder 35 (see FIG. 3) attached to the servomotor 29 .

(turret device 13)
The turret device 13 has a turret main body 41 and a turret 43 . The turret main body 41 has a box-like shape and is attached to the inclined guide surface 20 of the bed 14 . The turret 43 is rotatably attached to the surface of the turret main body 41 on the headstock 21 side. The turret 43 has a predetermined thickness in the Z-axis direction, and has, for example, a substantially regular decagon shape when viewed from the Z-axis direction. The turret 43 has ten sides and a tool mounting portion 49 on which a tool can be mounted. The tool attachment portion 49 has a structure capable of attaching a tool or the like to the surface of the turret 43 on the spindle device 11 side or the outer peripheral surface of the turret 43 . Cutting tools 60 and 63 (see FIG. 4) or rotary tools such as end mills and drills are detachably attached to the tool attachment portion 49 . Details of the tool mounting portion 49 will be described later. Note that FIG. 2 shows a state in which a pusher 45 for pushing the workpiece toward the spindle device 11 is attached to one of the plurality of tool attachment portions 49 .

Further, the turret device 13 has, for example, a turret servomotor 47 (see FIG. 3) built in the turret main body 41 . The control unit 17 controls the rotation of the turret servomotor 47 in the turret device 13 to rotate the turret 43 around a rotation axis (A axis) parallel to the Z-axis direction. In addition to rotating the turret 43 , the turret servomotor 47 functions as a drive source for rotating a rotary tool (such as an end mill) attached to the turret 43 . The control unit 17 performs rotation indexing of the turret 43 and rotation of a rotary tool attached to the turret 43 by, for example, controlling the turret servomotor 47 . The turret device 13 may be configured to include a drive source for rotating the rotary tool, in addition to the drive source for turning.

(Z-axis drive device 73)
The machine tool 10 also includes an X-axis driving device 71 (see FIG. 3) that moves the turret device 13 in the X-axis direction, and a Z-axis driving device 73 (see FIG. 3) that moves the turret device 13 in the Z-axis direction. The Z-axis driving device 73 includes a Z-axis guide rail 73A arranged on the guide surface 20 of the bed 14 and a Z-axis slide 73B slidable relative to the Z-axis guide rail 73A. The Z-axis guide rail 73A is arranged in a direction parallel to the Z-axis direction, and holds the Z-axis slide 73B slidably in the Z-axis direction. The Z-axis drive device 73 includes a Z-axis servomotor 73C (see FIG. 3), and transmits the rotation output of the Z-axis servomotor 73C to the Z-axis slide 73B via a transmission mechanism (for example, a ball screw). The axial slide 73B is moved in the Z-axis direction.

The Z-axis drive device 73 also includes a Z-axis encoder 73D that outputs encoder information such as the rotational position of the Z-axis servomotor 73C. The control unit 17 executes feedback control for controlling the rotational speed of the Z-axis servomotor 73C, etc., based on the encoder information (rotational position information, etc.) of the Z-axis encoder 73D. The control unit 17 controls the Z-axis servomotor 73C to move the Z-axis slide 73B to any position in the Z-axis direction.

(X-axis drive device 71)
The X-axis drive device 71 also includes an X-axis guide rail 71A arranged on the upper surface of the Z-axis slide 73B. In the following description of the X-axis driving device 71, the description of the configuration similar to that of the Z-axis driving device 73 will be omitted as appropriate. The X-axis guide rail 71A is arranged in a direction parallel to the X-axis direction, and holds the turret main body 41 so as to be slidable in the X-axis direction. The X-axis driving device 71 includes an X-axis servomotor 71C (see FIG. 3), and moves the turret main body 41 in the X-axis direction according to the drive of the X-axis servomotor 71C. The X-axis drive device 71 includes an X-axis encoder 71D that outputs encoder information for an X-axis servomotor 71C. The control unit 17 controls the X-axis servomotor 71C based on the encoder information of the X-axis encoder 71D to move the turret main body 41 to an arbitrary position in the X-axis direction. Therefore, the control unit 17 can move the turret device 13 (tool) to any position in the X-axis direction and the Z-axis direction by controlling the X-axis driving device 71 and the Z-axis driving device 73 . Further, the turret device 13 is moved in the X-axis direction by the X-axis driving device 71, so that the distance in the X-axis direction between the turret device 13 and the slide door 15A shown in FIG. 1 changes. That is, the turret 43 advances and retreats with respect to the slide door 15A. Incidentally, the method for detecting the position information of the Z-axis slide 73B and the turret main body 41 is not limited to the encoder. The control unit 17 may control the slide positions of the Z-axis slide 73B and the turret main body 41 using another position detection device such as a linear scale.

(Installation of cutting tools 60 and 63)
Next, the state of the

cutting tools

60, 63 attached to the turret 43 will be described. In the following description,

cutting tools

60 and 63 are attached to the turret 43 so that the

tips

60B and 63B can be attached to and removed from the

cutting edges

60A and 63A, and the

tips

60B and 63B are replaced. FIG. 4 shows two types of

cutting tools

60 and 63 attached to the turret 43 . As shown in FIG. 4 , the turret 43 is provided with tool mounting portions 49 at predetermined rotation angle intervals in the rotation direction 55 . The turret 43 of this embodiment is provided with a tool mounting portion 49 every 36 degrees, and a total of 10 tool mounting portions 49 are provided.

The tool mounting portion 49 is provided with a first mounting portion 57 and a second mounting portion 58 . The first attachment portion 57 has a flat surface formed on the outer peripheral surface of the turret 43, and has a threaded portion 57A for threading a threaded member 59 such as a bolt or a screw. A cutting tool 60 is attached to the first attachment portion 57 by a holder 61 . The cutting tool 60 has a cutting edge 60A, a tip 60B and a shank 60C. The shank 60C is fixed to the first mounting portion 57 by a holder 61. As shown in FIG. The holder 61 is fixed to a predetermined first attachment portion 57 (tool attachment portion 49 ) by a threaded member 59 . The shank 60</b>C is a substantially cylindrical or rectangular prism-shaped member elongated in the Z-axis direction, and is held by the holder 61 with its base end inserted into the holder 61 . For example, the shank 60</b>C is fixed in position in the Z-axis direction by a bolt screwed into the holder 61 . By loosening this bolt, the shank 60C can move relative to the holder 61 in the Z-axis direction. A tip 60B is detachably attached to the cutting edge 60A at the tip of the shank 60C. The tip 60B is fixed to the cutting edge 60A by a threaded member 62 such as a bolt or screw.

Also, the cutting tool 63 is attached to the second attachment portion 58 . A groove formed along the radial direction of the turret 43 is formed in the second mounting portion 58 . The cutting tool 63 has a cutting edge 63A, a tip 63B and a shank 63C. The shank 63C is attached to the second attachment portion 58 by a clamper 64. As shown in FIG. The clamper 64 is inserted into the groove of the second mounting portion 58 together with the base end portion of the shank 63C, and is screwed with the screwing member 64A. The clamper 64 is inserted into the groove of the second mounting portion 58 together with, for example, a wedge-shaped adjusting member (so-called liner), and the force for clamping the shank 63C is changed according to the amount of screwing of the screwing member 64A. . Therefore, the shank 63C is fitted into the groove together with the clamper 64 and fixed in position in the radial direction by screwing the screw member 64A. The shank 63</b>C is a radially elongated, substantially circular prism-shaped member, and its base end is held by a clamper 64 . A tip 63B is detachably attached to the cutting edge 63A at the tip of the shank 63C. The tip 63B is fixed to the cutting edge 63A by a threaded member 65 such as a bolt or screw. Therefore, the

cutting tools

60, 63 are so-called indexable tools in which the

tips

60B, 63B can be attached to and detached from the cutting edges 60A, 63A. The user replaces the

chips

60B and 63B by loosening the threaded member 62 of the cutting tool 60 and the threaded member 65 of the cutting tool 63 for the life chips that need to be replaced.

(Cutting tool replacement process)
Next, the control contents of the cutting tool exchange process by the control unit 17 will be described. FIG. 5 shows a flowchart of cutting tool replacement processing executed by the control unit 17 . For example, when receiving a predetermined operation input to the operation panel 16, the control unit 17 reads out an NC program or the like corresponding to the work from the control data 18A and executes it, and performs cutting or drilling on the work held by the spindle device 11. Machining is performed by a tool attached to the turret device 13 . The control unit 17 starts the processing shown in FIG. 5 each time machining of one workpiece is completed. The control unit 17, for example, sets a ladder circuit for each of the cutting tools 60 and 63 (see FIG. 4) attached to the turret 43, and counts up the number of times of use and judges in each ladder circuit, which will be described later. It should be noted that the control unit 17 may execute another program on the CPU to count up the number of uses without using the ladder circuit. Further, the condition for starting the processing shown in FIG. 5 is not limited to the condition that machining of one workpiece is completed, but may be the condition that machining of a predetermined number of workpieces is completed, or the condition that an execution instruction is received from the user.

First, when the control unit 17 starts the processing shown in FIG. 5, in step (hereinafter simply referred to as S) 11, the number of times of use of the

cutting tools

60 and 63 used in machining one workpiece is counted up. do. For example, the control unit 17 individually manages the number of uses of each of the

cutting tools

60 and 63 attached to the turret 43 using a ladder circuit. For example, the control unit 17 sets zero as the initial value of the number of uses of each of the

cutting tools

60 and 63 . The control unit 17 counts up by one each of the

cutting tools

60 and 63 that have been used even once during machining of one workpiece. Therefore, the control unit 17 of this embodiment counts up the number of times of use of the

cutting tools

60 and 63 to which the

tips

60B and 63B used in machining the workpiece are attached each time the machining of the workpiece is completed. Then, as will be described later, when the cumulative number of times of use reaches or exceeds a predetermined threshold number of times, the control unit 17 determines that the

chips

60B and 63B attached to the

cutting tools

60 and 63 that have exceeded the threshold number of times are life chips. Then, the user is instructed to replace the end-of-life chip. In addition, when

chips

60B and 63B, which will be described later, are replaced, the control unit 17 resets the accumulated number of times of use to zero (S29).

It should be noted that the method of determining the life chip is not limited to the above method. For example, the control unit 17 rotates the turret 43 to switch the

cutting tools

60 and 63 in machining one workpiece, and when the

same cutting tools

60 and 63 are used multiple times, the number of times the

cutting tools

60 and 63 are used is It may be counted up by the number of times it is used. Also, time may be used as a method for judging the life chip. After the

arbitrary cutting tools

60 and 63 are attached, the control unit 17 measures the cumulative time used for machining as the usage time, and when the usage time reaches a predetermined threshold time or longer, the threshold time or longer is reached. The

chips

60B and 63B of the

cutting tools

60 and 63 may be judged as life chips. Also, the control unit 17 may set a ladder circuit for each of the

chips

60B and 63B and count up the number of times the

chips

60B and 63B are used.

Next, in S13, the control unit 17 selects an arbitrary cutting tool to be used from among the cutting

tools

60 and 63 used for processing (hereinafter sometimes referred to as cutting tools to be used). For example, numbers 1 to 10 are assigned to the ten tool mounting portions 49 . As shown in FIG. 4, the number of the tool mounting portion 49 is written in the center of the surface of the turret 43 on the spindle device 11 side. The tool mounting portions 49 are numbered 1 to 10 counterclockwise. In S13, the control unit 17 selects, for example, one of the cutting tools to be used in order from the one with the smaller number of the tool attachment portion 49 .

When the cutting tool to be used is selected in S13, the control unit 17 determines whether the number of times of use of the selected cutting tool to be used is equal to or greater than the threshold number of times (S15). As the threshold number of times, different values may be set according to the shapes, purposes and functions of the

tips

60B and 63B and the shapes of the

cutting tools

60 and 63. A common value is used for all the

cutting tools

60 and 63. can be When the control unit 17 determines that the number of times of use is less than the threshold number of times (S15: NO), there are cutting tools that have not been selected among the cutting tools in use, that is, judgment of the threshold number of times in S15 is not executed. (S31). When the control unit 17 determines that there is no unselected cutting tool to be used (S31: YES). The processing shown in FIG. 5 ends. For example, the control unit 17 starts machining the next work, and when the machining of the work is completed, the processing shown in FIG. 5 is executed again for the used cutting tool used for the machining.

On the other hand, if there is an unselected cutting tool to be used (S31: NO), the control unit 17 selects an arbitrary cutting tool to be used from the unselected cutting tools to be used (S13). In addition, when the control unit 17 determines that the number of times of use of the cutting tool selected in S15 is equal to or greater than the threshold number of times (S15: YES), that is, the chips held by the

cutting edges

60A and 63A of the selected cutting tool When it is determined that 60B and 63B are life chips whose number of times of use is equal to or greater than the threshold number of times, S17 to S19 are executed to place the life chips at the tool change position.

Therefore, the control unit 17 of the present embodiment determines that the accumulated number of times of use of the

cutting tools

60, 63 to which the

chips

60B, 63B used for machining the work are attached after the machining of one work is completed is equal to or greater than the threshold number of times. It is judged whether or not there is (S15), and the

chips

60B and 63B attached to the

cutting tools

60 and 63 whose accumulated number of times of use is equal to or greater than the threshold number of times are judged to be life chips. As a result, the life chip can be efficiently determined using the threshold number of times. It is possible to reduce the processing load of the control unit 17 in the life chip determination processing.

Here, as shown in FIG. 4, for example, the

shanks

60C, 63C and cutting

edges

60A, 63A attached to the turret 43 have different structures depending on the shape to be machined. have different lengths in the radial direction of Each of the

chips

60B and 63B is held at different holding positions relative to the turret 43 in the Z-axis direction and the X-axis direction. For this reason, if the turret 43 is slid to a specific position in the Z-axis direction and the X-axis direction when exchanging the

tips

60B and 63B and each of the

tips

60B and 63B is indexed to the same rotational position, the tip Each of 60B and 63B is arranged at a different position. Therefore, when the same NC program is used as the NC program for arranging the life chips at the tool change position, the life chips are arranged at different positions.

Therefore, the control data 18A of this embodiment stores a plurality of types of NC programs corresponding to the relative holding positions of the

chips

60B and 63B on the turret 43, as described above. More specifically, the control data 18A includes, for example, cutting

tools

60 and 63 having a long length from the turret 43 to the holding position in the direction parallel to the rotation axis of the turret 43 (the Z-axis direction in this embodiment). The NC program is set so that the tool change position and the tool change position of the

cutting tools

60, 63 having a short length from the turret 43 to the holding position in the Z-axis direction are the same. For example, the number of the tool mounting portion 49 and the NC program used for exchanging the

cutting tools

60 and 63 mounted on the tool mounting portion 49 of that number are associated in advance and set in the control data 18A. Each NC program separates the tool change position in the Z-axis direction from the spindle device 11 as the length L in the Z-axis direction of the arbitrary cutting tools 60, 63 (holding positions) shown in FIG. direction is adjusted. Each NC program is adjusted so that the tool change positions of the

tips

60B and 63B attached to the

cutting edges

60A and 63A are the same in the Z-axis direction. As a result, the control unit 17 executes NC programs corresponding to relatively different holding positions, thereby adjusting the positions of the tool change positions in the Z-axis direction to the same position.

FIG. 6 schematically shows the state of adjusting the position of the tool change position in the Z-axis direction, and shows the state of adjusting the tool change position of the tip 60B attached to the cutting tool 60 as an example. In the following description, as an example, the case where the tip 60B is arranged at the tool change position will be described. As shown in FIGS. 1 and 2, the control unit 17 arranges the

chips

60B and 63B that have reached the end of life at the same tool change position P. As shown in FIG. The control unit 17 adjusts the tool change position P so that the position in the Z-axis direction is the same.

Fig. 6

shows cutting tools

81 and 82 as comparative examples. The cutting tool 81 has a shank 81C and a tip 81B attached to a cutting edge 81A at the tip of the shank 81C. The cutting tool 82 has a shank 82C and a tip 82B held by a cutting edge 82A at the tip of the shank 82C. Although the

cutting tools

60, 81 and 82 have different lengths in the Z-axis direction, they are attached to the holder 61 at the same position in the Z-axis direction. For example, the base ends of the

shanks

60C, 81C, and 82C (the right end in FIG. 6) match the base end of the holder 61 (the right end in FIG. 6). For this reason, for example, the reference position in the Z-axis direction of the length (distance) from the turret 43 to the holding positions 85, 85A, and 85B of the

tips

60B, 81B, and 82B is set to the

shanks

60C, 81C, 82C (holder 61) in the Z-axis direction (right end in FIG. 6). The length of the shank 81C of the cutting tool 81 in the Z-axis direction is shorter than the length of the shank 60C of the cutting tool 60. The length L1 along the Z-axis direction of the holding position 85A of the tip 81B held by the cutting edge 81A of the cutting tool 81 is compared to the length L of the holding position 85 of the tip 60B held by the cutting edge 60A of the cutting tool 60. is shorter. On the other hand, the length of the shank 82C of the cutting tool 82 in the Z-axis direction is longer than the length of the shank 60C of the cutting tool 60. The length L2 along the Z-axis direction of the holding position 85B of the tip 82B held by the cutting edge 82A of the cutting tool 82 is longer than the length L. As shown in FIG. The lengths L, L1, and L2 are, for example, when the holding

positions

85, 85A, and 85B are the centers of the

tips

60B, 81B, and 82B, and the right ends (spindle device 11) to the centers of

chips

60B, 81B, and 82B. The definitions of the lengths L, L1, and L2 are not limited to those defined above. The distance may be the length of the holding

positions

85, 85A, 85B from the turret 43. Also, the definitions of the lengths L, L1, and L2 may be appropriately corrected/changed according to the holding positions of the

shanks

60C, 81C, and 82C with respect to the holder 61. FIG.

For example, the longer the length of the shank 60C along the Z-axis direction, the further the holding position 85 of the chip 60B held by the cutting edge 60A becomes from the turret 43 in the Z-axis direction (length lengthens L). The holding position 85A of the cutting tool 81 is closer to the turret 43 than the holding position 85, and the holding position 85B of the tip 82B is farther from the turret 43 than the holding position 85 is. In the control data 18A, the NC program is adjusted so that the

tips

60B, 81B, and 82B arranged at these relatively

different holding positions

85, 85A, and 85B can be arranged at the same tool change position P in the Z-axis direction. there is

In S17 of FIG. 5, the control unit 17 calls an NC program corresponding to the cutting tool to be used selected in S13, which arranges the

tips

60B and 63B of the cutting tool to be used at the tool change position P. . For example, the control unit 17 reads the NC program from the control data 18A using the ladder circuit that determined the number of times of use in S15, and starts executing the NC program using the CPU. After starting the execution of the NC program in S17, the control unit 17 moves the turret 43 to the slide position corresponding to the cutting tool to be used selected in S13 (S18).

As shown in FIG. 6, the control unit 17 controls the Z-axis driving device 73 to move the turret 43 to the spindle device 11 in the Z-axis direction for the holding position 85A (cutting tool 81) with the shorter length L1. (leftward in FIG. 6) to align the holding

positions

85 and 85A in the Z-axis direction. As a result, the tool change positions P of the

cutting tools

60 and 81 match in the Z-axis direction. Further, the control unit 17 moves the turret 43 away from the spindle device 11 in the Z-axis direction (to the right in FIG. 6) for the holding position 85B (cutting tool 82) having a longer length L2. , and the holding

positions

85 and 85B in the Z-axis direction. As a result, the tool change positions P of the

cutting tools

60 and 82 are aligned in the Z-axis direction.

Therefore, the control unit 17 of the present embodiment controls the tool change position P of the cutting tool 82 having a long length L from the turret 43 to the holding position 85 along the Z-axis direction, which is the rotation axis of the turret 43, and the length L The tool change position P in the Z-axis direction is adjusted so that the tool change position P of the cutting tool 81 with a short length approaches. Furthermore, the control unit 17 adjusts the tool change position P so that the positions of the tool change positions P in the Z-axis direction are the same. As a result, the

tips

60B, 81B, and 82B held by the cutting edges 60A, 81A, and 82A at the tips of the

shanks

60C, 81C, and 82C having different lengths L, L1, and L2 along the Z-axis direction, that is, the Z-axis direction The

tips

60B, 81B, and 82B held at relatively

different holding positions

85, 85A, and 85B can be arranged at the same tool changing position P in the Z-axis direction. The

tips

60B, 81B, and 82B to be replaced can be arranged at the same position in the Z-axis direction every time the life tip is replaced. Since the user can remove the threaded member 62 at the same tool changing position P every time, the tool can be replaced efficiently.

In addition, the control unit 17 adjusts the position of the tool change position P in the Z-axis direction, and adjusts the cutting tool 82 having a long length L in the Z-axis direction as compared with the cutting tool 81 having a short length L. It is moved in a parallel direction away from the spindle device 11 . According to this, the tool change position P can be adjusted by moving the cutting tool 82 having a longer length L in the direction away from the spindle device 11 (rightward direction in FIG. 6). The tool change position P can be adjusted while avoiding interference between the

tips

60B, 81B, 82B and the spindle device 11.

Also, although the tip 60B has been described in the example shown in FIG. 6, the tip 63B can be similarly adjusted in the Z-axis direction. For example, as shown by the length L in FIG. 4, the distance from the base end of the turret 43 (the far end from the spindle device 11 in the Z-axis direction) to the center of the tip 63B is the distance from the turret 43 to the tip 63B holding position. The length L to the position may be defined, and the control unit 17 may perform adjustment to match the tool change position P according to the length L. Further, in S17, the control unit 17 performs position adjustment not only in the Z-axis direction but also in the X-axis direction. The control unit 17 performs position adjustment according to the length from the turret 43 to the holding positions 85, 85A, and 85B along the X-axis direction also in the X-axis direction in the same manner as in the Z-axis direction. For example, the control unit 17 controls the X-axis driving device 71 so that the tool change position P of the

cutting tools

60 and 63 having a long length in the X-axis direction (length Lx shown in FIG. 6) and The tool change position P in the X-axis direction is adjusted so that the tool change positions P of the

cutting tools

60 and 63 having the short length Lx are closer to each other. As a result, the tool change position P can be matched not only in the Z-axis direction but also in the X-axis direction, thereby reducing the work burden on the user. The length Lx in the X-axis direction from the turret 43 to the holding positions 85, 85A, and 85B is, for example, can be defined as the distance to That is, the length Lx is the distance from the turret 43 to the holding positions 85, 85A, 85B along the X-axis direction orthogonal to the rotation axis of the turret 43. Therefore, even if the lengths of the

shanks

60C and 63C along the X-axis direction and the Z-axis direction are the same, the distance from the turret 43 to the holding positions 85, 85A, and 85B along the X-axis direction and the Z-axis direction is large. If the distance is different, the length L and the length Lx will be different. Also, the control unit 17 may perform only one position adjustment in the X-axis direction or the Z-axis direction. For example, the control unit 17 may match only the positions of the tool change positions P in the Z-axis direction. Also, the control unit 17 may perform position adjustment of only one of the tip 60B and the tip 63B. For example, the control unit 17 may match only the tool change position P of the tip 60B.

After executing S18 in FIG. 5, the control unit 17 determines the cutting tool to be used selected in S13 to the tool change position P (S19). The control unit 17 controls the turret servomotor 47 to place the

chips

60B and 63B of the cutting tool to be used at the tool change position P shown in FIG. As a result, the end-of-life inserts requiring replacement can be arranged at the same tool replacement position P regardless of the holding positions 85 of the

inserts

60B and 63B.

After executing S19, the control unit 17 ends the execution of the NC program, stops the turret device 13, etc., and notifies the user that the life chip has been placed at the tool change position P (S20). The control unit 17, for example, emits a warning lamp or a warning lamp attached to the operation panel 16 or the device cover 15 to notify that the life chip has been placed at the tool change position P (S20). Further, the control unit 17 may perform notification by a method such as sounding a buzzer or displaying characters prompting replacement on the touch panel 19A.

After executing S20, the control unit 17 determines whether or not the replacement of the life chip has been completed (S27). The control unit 17 determines whether or not the replacement of the life chip has been completed based on the operation input on the touch panel 19A. When the user confirms the notification of S20, the user opens the slide door 15A and removes the end-of-life chips arranged at the tool change position P from the

cutting edges

60A and 63A and replaces them. After the replacement, the user operates the touch panel 19A to execute an operation instruction indicating that the replacement is completed. The control unit 17 makes a negative determination in S27 (S27: NO) and repeats the determination process of S27 until the operation instruction is accepted. When the control unit 17 receives an operation instruction indicating replacement (S27: YES), it resets the number of times of use of the used cutting tool selected in S13 to zero (S29).

After executing S29, the control unit 17 executes S31, and if there is an unselected cutting tool to be used (S31: NO), executes S13 again. If there is another life chip, the control unit 17 executes S17 to S19, executes the NC program corresponding to the

cutting tools

60, 63 to which the other life chip is attached, and Place the life chip at the tool change position P.

Therefore, when the control unit 17 determines that it is necessary to replace the first life insert and the second life insert, which is different from the first life insert, after indexing the first life insert to the tool replacement position P, the first life insert The touch panel 19A accepts an operation input to the effect that the replacement of the end-of-life chip has been completed. When the operation input is received, the control unit 17 moves the turret 43 in the Z-axis direction and the X-axis direction according to the length from the turret 43 of the second life chip to the holding position 85, and controls the turret device 13. The second life insert is indexed to the tool change position P. As a result, when a plurality of life chips occur in one machining operation, the life chips can be arranged at the same tool change position P each time the

chips

60B and 63B are replaced. The user's workload in exchanging a plurality of

chips

60B and 63B can be greatly reduced.

It should be noted that, if there are a plurality of life chips, the control unit 17 may perform position adjustment only for the first life chip. For example, after arranging the first longevity chip at the tool change position P, the control unit 17 does not change the position of the turret 43 in the Z-axis direction or the X-axis direction when receiving an operation input indicating that the change has been completed. , the turret 43 may be rotated to index the second life chips. Alternatively, after arranging the first longevity chip at the tool change position P, the control unit 17 may arrange the second longevity chip at the tool change position P desired by the user according to the user's operation input to the operation unit 19 . .

Further, as shown in FIG. 3, the control section 17 of the operation panel 16 has a determination section 17A and a position adjustment section 17B. The determination unit 17A and the like are processing modules realized by executing control data 18A (NC program, ladder circuit, etc.) in the CPU of the control unit 17, for example. Note that the determination unit 17A and the like may be configured by hardware instead of software, or may be configured by combining software and hardware.

The judging section 17A has a function of judging whether or not there are

chips

60B and 63B that require replacement among the

chips

60B and 63B attached to the

cutting tools

60 and 63 held in the turret device 13 and whether or not there is a life chip. Department. When the determination unit 17A determines that there is a life chip, the position adjustment unit 17B controls the X-axis driving device 71 and the Z-axis driving device 73 to place the life chip at the tool change position P, and the turret 43 It is a functional unit that adjusts the tool change position P according to the holding positions 85, 85A, and 85B of the life chips in the .

By the way, the spindle device 11 is an example of a work holding device. The turret servomotor 47 of the turret device 13 is an example of a rotating device. The operation unit 19 is an example of a reception device. The X-axis driving device 71 and the Z-axis driving device 73 are examples of slide devices. The Z-axis direction is an example of a first direction. The X-axis direction is an example of a second direction.

As described above, according to the above-described first embodiment, the following effects are obtained.
In one aspect of the present embodiment, the control unit 17 determines that, of the

chips

60B and 63B attached to the

cutting tools

60 and 63 held by the turret 43, the

chips

60B and 63B that require replacement exist. (S15). If the control unit 17 determines that there is a life chip (S15: YES), it controls the X-axis driving device 71 and the Z-axis driving device 73 to control the holding

positions

85, 85A, and 85B of the life chip on the turret 43. The tool change position P is adjusted (S18). As a result, desired machining (boring, etc.) can be performed on the workpiece by the

tips

60B, 63B attached to the

different holding positions

85, 85A, 85B, and the tool change position P can be changed according to the holding positions 85, 85A, 85B. Adjustable. By adjusting the tool changing position P, the efficiency of the changing work of the

tips

60B and 63B can be improved.

(Second embodiment)
In the first embodiment described above, the control unit 17 targets the

cutting tools

60 and 63, which are so-called throwaway tools whose

tips

60B and 63B can be attached to and removed from the

cutting edges

60A and 63A, as the cutting tools of the present disclosure. Although the replacement position P has been adjusted, the present invention is not limited to this. The control unit 17 of the present disclosure may perform adjustment of the tool change position P for an integrated cutting tool in which a cutting edge and a shank are integrally provided.

FIG. 7 shows the mounting state of the cutting tool of the second embodiment. In the following description, the same reference numerals are assigned to the same configurations as in the first embodiment, and the description thereof will be omitted as appropriate. As shown in FIG. 7, the turret 43 is fitted with

integral cutting tools

86 and 87 in addition to the

cutting tools

60 and 63 . The integrated cutting tool 86 is, for example, a so-called solid bit (finished bit) in which the shank and cutting edge are integrally formed from the same material. The integrated cutting tool 86 has a tip 88 formed by grinding a cutting edge and is provided integrally with the shank. The integrated cutting tool 86 is attached to the first attachment portion 57 of the turret 43 by the holder 61 .

The integrated cutting tool 87 is, for example, a so-called brazing bit (attached blade bit) in which a tip 89 made of a harder material such as cemented carbide is brazed to the tip of a shank made of steel. Integrated cutting tool 87 is attached to second attachment portion 58 of turret 43 by clamper 64 . Similar to the

cutting tools

60 and 63, such

integrated cutting tools

86 and 87 require polishing or replacement after being used a certain number of times. For example, the

integrated cutting tools

86, 87 may be removed from the turret 43, and reattached to the turret 43 after the

tips

88, 89 are ground by a grinder or tool grinder. Alternatively, the

integrated cutting tools

86,87 are replaced with

integrated cutting tools

86,87 of the same type.

Unlike the

cutting tools

60 and 63, the

integrated cutting tools

86 and 87 are configured such that when the number of times of use reaches the threshold number of times or more, the entire cutting tool including the shank is removed from the tool attachment portion 49 (first and

second attachment portions

57 and 58). ) must be removed. When there is an integrated cutting tool 86 or 87 (hereinafter referred to as a life tool) that has been used more than a threshold number of times, the control unit 17 adjusts the position of the holder 61 or clamper 64 of the tool in the Z-axis direction. The Z-axis driving device 73 is controlled so that the tool change position P is reached at . Thereby, the user can remove the

integrated cutting tools

86 and 87 from the turret 43 (the holder 61 and the clamper 64) at the same tool exchange position P, and can efficiently perform the exchange work.

Since the

integrated cutting tools

86 and 87 are removed from or attached to the turret 43 during the replacement work, if the

integrated cutting tools

86 and 87 increase in weight, removal becomes difficult and the work load increases. For example, in the case of the integrated cutting tool 86, the longer the length in the Z-axis direction, the more the weight increases, and the work load for extracting and removing from the holder 61 and inserting and attaching increases. Further, if the integrated cutting tool 87 is used, the weight increases as the radial length of the turret 43 increases, and the work load of loosening the clamper 64 and replacing the integrated cutting tool 87 increases. Therefore, the control unit 17 brings the tool change position P of the

integrated cutting tools

86 and 87 closer to the slide door 15A than the

cutting tools

60 and 63 in the X-axis direction. In addition, the control unit 17 brings the tool change position P of the heavier

integrated cutting tools

86 and 87 closer to the slide door 15A in the X-axis direction.

Therefore, as described above, the device cover 15 of the machine tool 10 covers the processing chamber for processing the workpiece held by the spindle device 11, and includes the slide door 15A (an example of the door of the present disclosure) for opening and closing the processing chamber. there is The turret 43 is moved in the X-axis direction (an example of the second direction of the present disclosure) by the X-axis driving device 71 to change the distance between the turret 43 and the slide door 15A. At least one of the plurality of tool mounts 49 is mountable with an

integrated cutting tool

86,87. The control unit 17 determines whether or not the

integrated cutting tools

86, 87 held by the turret 43 need to be replaced in the same manner as in the first embodiment (see FIG. 5). When it is determined that one of the

integrated cutting tools

86 and 87 needs to be replaced, the control unit 17 controls the X-axis driving device 71 and the Z-axis driving device 73 to select the integrated cutting tool that needs to be replaced. 86 and 87 are placed at the tool change position P. Further, the control unit 17 controls the X-axis drive device 71 to move the turret 43 in the X-axis direction, and moves the tool change position P to the slide door 15A as the

integrated cutting tools

86 and 87 become heavier. Perform a closer adjustment. As a result, the burden of replacing the

integrated cutting tools

86 and 87 for removing the cutting tools themselves from the turret 43 can be reduced.

For example, similarly to the

cutting tools

60, 63 of the first embodiment, an NC program may be set in the control data 18A to bring the tool change position P closer to the slide door 15A according to the weight of the

integrated cutting tools

86, 87. . Then, the control unit 17 executes the NC program corresponding to the

integrated cutting tools

86, 87 that need to be replaced, thereby sliding the tool replacement position P according to the weight of the

integrated cutting tools

86, 87. It can be brought closer to the door 15A.

Further, as shown in FIG. 7, the control unit 17 controls the cutting tool when cutting

tools

60 and 63 for replacing only the

tips

60B and 63B and

integrated cutting tools

86 and 87 for removing the cutting tool itself are mixed. Adjustment may be made to bring the tool change position P of the

integrated cutting tools

86, 87 closer to the slide door 15A than the tool change position P of 60, 63. As a result, for the

integrated cutting tools

86 and 87, which have a large work load, the work load can be reduced by setting the tool change position P at a position closer to the slide door 15A. For the

cutting tools

60 and 63 with a relatively small work load, by setting the tool change position P at a position relatively far from the slide door 15A, it takes time to arrange the life chip at the tool change position P. can be shortened.

(Third embodiment)
Further, the machine tool of the present disclosure is not limited to the slant bed type horizontal lathe of the above embodiment, and various configurations such as a front spindle lathe, an opposed two-spindle lathe, and a machining center can be employed. FIG. 8 shows a machine tool 91 of the third embodiment. In the following description, the description of the contents similar to those of the first embodiment will be omitted as appropriate. The machine tool 91 has two sets of combinations of a spindle device 92 and a turret device 93 . Each of the two spindle devices 92 rotates a work (not shown) around a rotation axis parallel to the longitudinal direction of the device. Also, each of the two turret devices 93 rotates the turret 94 around a rotation axis along a direction parallel to the longitudinal direction of the device. Therefore, the machine tool 91 is a so-called front parallel twin-axis lathe.

Each of the two turret devices 93 is slidable in the front-rear direction and the left-right direction by a slide device 101 provided on the bed 99 . Therefore, the turret device 93 can change its position in the front-back direction and the left-right direction with respect to the workpiece held by the spindle device 92 . The turret 94 holds a cutting tool 98 with a tip 97 attached. In order to avoid complicating the drawing, FIG. 8 shows a state in which the cutting tools 98 are attached only to some of the plurality of tool attachment portions of the turret 94 .

In such a turret device 93, when the cutting tool 98 held by the turret 94 is held at different positions in the front-rear direction (direction parallel to the rotation axis of the turret 94) or the left-right direction (radial direction of the turret 94) , may perform life chip adjustments. Specifically, the machine tool 91 moves the cutting tool 98 having a long length from the turret 94 to the holding position of the tip 97 along the front-rear direction (an example of the first direction of the present disclosure) at the tool change position. When disposing, the turret 94 is moved forward in a direction away from the spindle device 92 . The machine tool 91 is arranged so that the tool change position of the tip 97 of the cutting tool 98 having a long length to the holding position in the front-back direction and the tool changing position of the cutting tool 98 having a short length to the holding position in the front-back direction are aligned. to control. As a result, even if the lengths to the holding position are different, the tool changing position can be set at the same place, and the load of the tip 97 changing work can be reduced. Also in the machine tool 91 of the third embodiment, similarly to the second embodiment, when the

integrated cutting tools

86 and 87 are attached, the tool exchange position P of the

integrated cutting tools

86 and 87 is changed to the cutting position. Compared to the tool change position P of the tool 98, it may be on the door side of the device (for example, on the front side away from the spindle device 92). Also, the tool change position P of the heavier

integrated cutting tools

86, 87 may be closer to the door that the user opens and closes for replacement.

(Fourth embodiment)
Also, the main shaft of the main shaft device 11 does not have to be parallel to the rotation axis of the turret 43 . FIG. 9 shows a machine tool 111 of the fourth embodiment. In the machine tool 111, a main shaft 117 for rotating a workpiece 115 by the main shaft device 11 and a rotation shaft 119 of the turret 43 are perpendicular to each other. In such a machine tool 111, the tip 60B attached to the cutting tool 60 held by the turret 43 is rotated in the X-axis direction (parallel to the rotating shaft 119 of the turret 43) and Z-axis direction (parallel to the main shaft 117). ), the tool change position P may be adjusted. Specifically, the machine tool 111 moves the life chip attached to the cutting edge 60A at the tip of the cutting tool 60 having a long length L along the X-axis direction (an example of the first direction of the present disclosure) to the tool change position P. 9, which is the direction away from the spindle device 11 (separation direction in the direction parallel to the rotating shaft 119). The machine tool 111 has a tool change position P of a tip 60B attached to a cutting edge 60A at the tip of a cutting tool 60 with a long length L in the X-axis direction, and a tip of the cutting tool 60 with a short length L in the X-axis direction. The tool change position P of the tip 60B attached to the cutting edge 60A is controlled to match. As a result, even in the machine tool 111 in which the main shaft 117 and the rotary shaft 119 are not parallel, the tool change position P of the tips 60B having different holding positions 85 can be set to the same place, and the load of the tip 60B replacement work can be reduced. Incidentally, in the machine tool 111 shown in FIG. 9, adjustment in the Z-axis direction may be performed in the same manner as in the X-axis direction. That is, the tool change position P in the Z-axis direction may be adjusted according to the length Lz from the turret 43 to the holding position 85 in the Z-axis direction. The length Lz is, for example, the distance from the plane of the first mounting portion 57 (the outer peripheral surface of the turret 43) along the Z-axis direction to the center of the chip 60B.

Also, in the fourth embodiment shown in FIG. 9, the main shaft 117 and the rotating shaft 119 are perpendicular to each other, but the present invention is not limited to this. For example, the direction along the rotating shaft 119 may form a predetermined angle with respect to the main shaft 117 (such as an angle rotated clockwise by 45 degrees in FIG. 9). Also in this case, the machine tool 111 moves the turret 43 in a direction parallel to the rotation axis 119 of the turret 43, and adjusts the tool change position P of the tip 60B attached to the cutting tool 60 having a different length L. can be Also in the machine tool 111 of the fourth embodiment, similarly to the second embodiment, when the

integrated cutting tools

86 and 87 are attached, the tool change position P of the

integrated cutting tools

86 and 87 is changed to the cutting The tool 60 may be located on the door side of the device (for example, on the side away from the main shaft device 11 in the direction parallel to the main shaft 117) compared to the tool change position P of the tool 60. Also, the tool change position P of the heavier

integrated cutting tools

It goes without saying that the present disclosure is not limited to the above embodiments, and that various improvements and modifications are possible without departing from the scope of the present disclosure.
For example, in the above embodiment, the control unit 17 adjusts the tool change position P so that the positions in the Z-axis direction and the X-axis direction are the same, but the positions need not be the same. For example, the control unit 17 sets the tool change position P of the cutting tool 82 (see FIG. 6) having a long length L along the Z-axis direction and the tool change position P of the cutting tool 81 having a short length L within a certain range. You can bring it closer to the inside.
In the above embodiment, as shown in FIG. 6, the control unit 17 moves the cutting tool 82 having the longer length L away from the main spindle device 11 and brings the shorter cutting tool 81 closer to the main spindle device 11. Although the tool exchange position P was made to match by moving in the direction, the moving direction is not limited to this. For example, with the holding position 85B having the longest length L2 as a reference, the

other cutting tools

60 and 81 are moved in a direction approaching the holding position 85B, that is, in a direction approaching the spindle device 11 in the Z-axis direction. The tool change position P may be matched.

Also, the order of processing in the flow chart shown in FIG. 6 and the content of processing in each step are examples. For example, the control unit 17 performs adjustment in the Z-axis direction and the X-axis direction in S18, and then rotates the turret 43 in S19 to determine the life chip, but the order is not limited to this. The control unit 17 may first rotate the turret 43 and then adjust the position in the Z-axis direction or the like to place the life chip at the tool change position P. FIG. That is, the control unit 17 may execute S18 after S19.

10, 91, 111 machine tool, 11 spindle device (work holding device), 15 device cover, 15A slide door (door), 17 control section (judgment section, position adjustment section), 17A judgment section, 17B position adjustment section, 19 Operation unit (receiving device), 43 turret, 47 turret servo motor (rotating device), 49 tool mounting unit, 60, 63, 81, 82, 98 cutting tool, 60C, 63C, 81C, 82C shank, 60B, 63B, 81B, 82B, 88, 89 tip (lifetime tip), 71 X-axis drive device (slide device), 73 Z-axis drive device (slide device), 85, 85A, 85B Holding position, 86, 87 Integrated cutting tool, 115 Work, L, L1, L2 Length, P Tool change position.

Claims

a workpiece holding device that holds a workpiece and rotates about the spindle;
a turret to which a cutting tool with a detachable tip is attached and which performs machining on the workpiece with the tip;
a slide device that slides the turret in a first direction parallel to the main axis and in a second direction perpendicular to the first direction;
a rotating device for rotating the turret;
a control unit;
with
The turret has
A tool mounting portion is provided at each predetermined rotation angle in the rotation direction,
Each of the plurality of tool mounting portions includes:
the cutting tool is attachable,
The control unit
a judgment unit for judging whether or not there is an end-of-life tip, which is the tip that needs to be replaced, among the tips attached to the cutting tool held by the turret;
When the determination unit determines that the life chip exists, the slide device is controlled to place the life chip at a tool change position, and the tool is changed according to the holding position of the life chip in the turret. a position adjustment unit that adjusts the position;
A machine tool having
The rotating device is
rotating the turret about an axis of rotation;
The position adjustment unit
The tool change position of the cutting tool has a long length from the turret to the holding position in a direction parallel to the rotation axis, and a short length from the turret to the holding position in a direction parallel to the rotation axis. 2. The machine tool according to claim 1, wherein said tool change position in a direction parallel to said rotation axis is adjusted so as to come close to said tool change position of said cutting tool.
The rotating device is
rotating the turret about a rotation axis parallel to the first direction;
Each of the plurality of tool mounting portions includes:
The cutting tools having different lengths along the first direction are attached respectively,
The position adjustment unit
The position of the tool changing position in the first direction is adjusted, and the cutting tool having a long length from the turret along the first direction to the holding position is adjusted when adjusting the tool changing position. 2. The cutting tool is moved in a direction parallel to the first direction away from the workpiece holding device, compared to the cutting tool having a short length from the turret to the holding position along one direction. A machine tool according to claim 2.
The position adjustment unit
4. The machine tool according to claim 3, wherein the tool change position is adjusted such that the tool change positions of the life inserts held by each of the plurality of cutting tools are the same in the first direction. .
further comprising a reception device that receives operation input,
The position adjustment unit
After controlling the slide device to adjust the position of the tool change position in the first direction, the rotating device is controlled to index the life tip to the tool change position, and the plurality of tips have a first life span. When it is determined by the determination unit that the tip and the second life tip different from the first life tip need to be replaced, the first life tip is indexed to the tool replacement position, and then the first life tip is replaced. When the reception device receives an operation input to the effect that the replacement of the tip has been completed, the slide device is controlled to move the turret in the first direction according to the length of the second life chip from the turret to the holding position. 5. The machine tool according to any one of claims 2 to 4, wherein said rotating device is controlled to index said second life insert to said tool change position.
The rotating device is
rotating the turret about an axis of rotation;
The position adjustment unit
The tool change position of the cutting tool has a long length from the turret to the holding position in the direction perpendicular to the rotation axis, and the cutting tool has a short length from the turret to the holding position in the direction perpendicular to the rotation axis. 2. The machine tool according to claim 1, wherein said tool changing position in a direction perpendicular to said rotation axis is adjusted so as to come close to said tool changing position of said cutting tool.
The determination unit
After the machining of one workpiece is completed, it is determined whether or not the cumulative number of times of use of the cutting tool attached with the tip used for machining the workpiece is equal to or greater than a predetermined threshold number of times, and the cumulative use is determined. 7. The machine tool according to any one of claims 1 to 6, wherein the chip attached to the cutting tool whose number of times is equal to or greater than the threshold number of times is determined to be the life chip.
further comprising a device cover,
The device cover includes:
A door that covers a processing chamber for processing the work held by the work holding device and opens and closes the processing chamber,
The turret is
The distance between the door fluctuates by being moved by the slide device,
At least one of the plurality of tool mounting portions,
An integrated cutting tool in which the tip is provided integrally with the cutting tool can be attached,
The determination unit
determining whether replacement of the integrated cutting tool held by the turret is required;
The position adjustment unit
When the determination unit determines that the integrated cutting tool needs to be replaced, the slide device is controlled to arrange the integrated cutting tool to be replaced at the tool replacement position, and 8. A device according to any one of claims 1 to 7, wherein a device is controlled to move the turret to adjust the tool change position closer to the door as the weight of the integrated cutting tool increases. The machine tool described in .
The position adjustment unit
9. The machine tool of claim 8, wherein adjustment is performed to bring the tool change position of the integrated cutting tool closer to the door than the tool change position of the life insert.