JP2021037581A - Machining center - Google Patents

Abstract

To prevent foreign objects, such as chips, from being caught between a holder attachment part and a tool holder in a machining center.SOLUTION: A machining center 1 includes: a partition 25 partitioning a processing chamber 20 in which processing is performed to a workpiece W from a magazine chamber 30 which houses a tool magazine 31, the partition 25 having an opening 27 through which a spindle 40 may pass; a cover 28 which is provided at the opening 27 and may open or close; and cleaning nozzles 34 which may jet a fluid to a tool exchange position E from an opposite position across the tool exchange position E when viewed from the opening 27. In the machining center 1, the cover 28 is opened and the fluid is jetted from the cleaning nozzles 34 to the processing chamber 20 through the tool exchange position E and the opening 27 when a tool T is exchanged.SELECTED DRAWING: Figure 1

Description

The present invention relates to a machining center, and more particularly to a cleaning technique for a tool holder or the like.

In the machining center, if foreign matter such as chips is caught between the holder mounting part of the spindle and the tool holder during tool replacement, the tool mounted on the tool holder will be tilted with respect to the spindle, and this state will occur. If machining is performed with, the tip of the tool will swing and the machining accuracy will decrease.

Therefore, in the machining center disclosed in Patent Document 1, the coolant can be discharged downward from the holder mounting portion, and the coolant is discharged from the holder mounting portion toward the tool holder when the tool is changed, thereby causing the tool holder. I try to wash it.

Japanese Unexamined Patent Publication No. 2015-107544

According to the technique disclosed in Patent Document 1, it is possible to remove foreign matter adhering to the tool holder to be attached to the spindle.

However, since tool replacement is performed in the magazine chamber, foreign matter scattered in the magazine chamber due to cleaning may reattach to the holder mounting part and the tool holder to be mounted, and there is still a gap between the holder mounting part and the tool holder. Foreign matter could be caught.

The present invention has been made in view of such technical problems, and an object of the present invention is to prevent foreign matter such as chips from being caught between a holder mounting portion and a tool holder in a machining center.

According to an aspect of the present invention, in a machining center, between a spindle in which a tool holder of a tool can be attached to a holder mounting portion, a processing chamber in which machining is performed on a workpiece, and a magazine chamber in which a tool magazine is housed. A partition having an opening through which the spindle can pass, an openable / closable cover provided in the opening, and a tool changing position for exchanging tools between the spindle and the tool magazine as viewed from the opening. A cleaning nozzle capable of injecting fluid from a position on the opposite side of the tool toward the tool exchange position is provided, and when the tool is exchanged, the cover is opened and the tool exchange position and the tool exchange position are provided from the cleaning nozzle. A machining center is provided that injects fluid toward the processing chamber through the opening.

According to the above aspect, the tool holder attached / detached at the tool changing position can be cleaned. Since the cover is opened during cleaning, foreign matter such as fluid used for cleaning and chips removed by cleaning scatter toward the processing chamber through the opening, and become the holder mounting part of the spindle and the tool holder in the magazine chamber. Foreign matter such as chips does not reattach.

Therefore, according to the present embodiment, the tool holder can be kept clean, and foreign matter such as chips can be prevented from being caught between the holder mounting portion of the spindle and the tool holder.

It is a schematic side view of the machining center which concerns on this embodiment. It is a schematic plan view of the machining center which concerns on this embodiment (the spindle drive part excluding the spindle head is omitted). It is a schematic front view of the machining center which concerns on this embodiment (the front wall and the front door are omitted). It is a figure which showed the state which the tool is attached to the spindle. It is a flowchart which showed the content of the program for processing a work using the machining center which concerns on this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 show a schematic configuration of a machining center 1 according to an embodiment of the present invention. 1 is a schematic side view, FIG. 2 is a schematic plan view, and FIG. 3 is a schematic front view. In FIG. 2, the spindle drive unit 50 excluding the spindle head 51 is omitted so that the internal configuration can be easily grasped. The front wall 23 and the front door 26 are omitted in the above. In the following description, the direction orthogonal to the paper surface of FIG. 1 is referred to as the X-axis direction, the direction orthogonal to the paper surface of FIG. 2 is referred to as the Z-axis direction, and the direction orthogonal to the paper surface of FIG. 3 is referred to as the Y-axis direction.

The machining center 1 is a machine tool that performs machining and automatic tool replacement by numerical control. The machining center 1 is provided on a base portion 10 in which a dirty tank 11 and a clean tank 12 for storing a coolant (cutting fluid) as a fluid for lubrication, cooling, and cleaning are stored, and a base portion 10, and is provided on the base portion 10 to the work W. A machining chamber 20 where machining is performed, a magazine chamber 30 which is also provided on the base portion 10 and accommodates a tool magazine 31 for holding a plurality of tools T, and a magazine chamber 30 which is provided on the magazine chamber 30 and has a spindle 40 in three axial directions. It is composed of a spindle drive unit 50 that is moved to the machine, and a controller 60 that is provided on the back surface of the machining center 1 and controls each part of the machining center 1. The details of each part will be described below.

[Main shaft 40 and main shaft drive unit 50]
The spindle 40 is rotatably supported by the spindle head 51 of the spindle drive unit 50, and can rotate at high speed by driving a motor (not shown). A tool T such as a drill, an end mill, or a milling cutter is attached to the spindle 40.

At the lower end of the main shaft 40, a substantially conical holder mounting portion 41 having an inner surface as a tapered surface is formed. The tool T is also attached to a tool holder H having a substantially conical tapered portion TP, and the tool T is attached to the spindle 40 by attaching the tool holder H to the holder attachment portion 41.

FIG. 4 shows how the tool T is mounted on the spindle 40. When the tapered portion TP of the tool holder H is inserted into the holder mounting portion 41 (FIGS. 4 (a) to 4 (b)) and the clamp member 42 is displaced in a direction away from the holder mounting portion 41 by an actuator (not shown) (FIG. 4). 4 (c)), the claw 43 of the clamp member 42 engages with the pull stat P of the tool holder H, the tool holder H is pulled into the holder mounting portion 41, and the tool holder H is clamped to the spindle 40. In order to unclamp the tool holder H, conversely, the clamp member 42 may be displaced in the direction closer to the holder mounting portion 41. There are a plurality of standards for the tool holder H, and the shapes of the tool holder H and the holder mounting portion 41 shown here are examples.

Inside the main shaft 40, an air passage 44 that opens at the apex of the holder mounting portion 41 is formed. When air as a second fluid is supplied to the air passage 44 from an air supply source (not shown), air can be injected from the air passage 44 toward the holder mounting portion 41. When the tool T is attached or detached, the tool holder H is arranged at a position facing the air passage 44 as shown in FIG. 4A. Therefore, when air is injected from the air passage 44 immediately before the tool holder H is clamped. , Foreign matter such as chips adhering to the holder mounting portion 41 and the tool holder H can be blown off (air purge).

As shown in FIGS. 1 and 3, the spindle drive unit 50 includes a spindle head 51, an X-axis slider 52, and a Y-axis slider 53. The spindle head 51 is rotatably supported by the spindle 40 and slidably supported by the X-axis slider 52 in the Z-axis direction, and can be moved in the Z-axis direction by driving a Z-axis actuator (not shown). The X-axis slider 52 is slidably supported by the Y-axis slider 53 in the X-axis direction, and can be moved in the X-axis direction by driving an X-axis actuator (not shown). The Y-axis slider 53 is slidably supported in the Y-axis direction by a rail 54 extending in the Y-axis direction on the magazine chamber 30, and can move in the Y-axis direction by driving a Y-axis actuator (not shown). it can.

The spindle drive unit 50 is controlled by the controller 60, and when the spindle head 51, the X-axis slider 52, and the Y-axis slider 53 are moved, the spindle 40 supported by the spindle head 51 is moved in the three-axis directions. Can be done. As a result, the tool T mounted on the spindle 40 can be moved to the machining portion of the work W, and machining can be performed according to the tool T. During machining, in order to lubricate, cool and clean the tool T and the machined portion, coolant is injected toward the tool T and the machined portion from a nozzle (not shown). The chips generated by the processing and the coolant used for lubricating and cooling each part are collected in the dirty tank 11 in the base portion 10. The coolant in the dirty tank 11 is reused after foreign matter such as chips is removed by a scraper type chip conveyor (not shown).

[Processing room 20]
A table 21 is arranged in the processing chamber 20. Further, the table 21 is provided with a plurality of clamp portions 22 for clamping the work W placed on the table 21. The plurality of clamp portions 22 are driven in response to a command from the controller 60, and clamp the work W by engaging with a predetermined portion of the work W. In this example, the table 21 is a fixed type, but the machining center 1 may be 4-axis or 5-axis by making the table 21 rotatable or rotatable around one or two axes.

The upper part of the processing chamber 20 is substantially entirely open so as not to hinder the movement of the spindle 40 in the X-axis direction and the Y-axis direction. On the other hand, the processing chamber 20 is surrounded by a front wall 23, a side wall 24, and a partition 25 so that chips and coolant do not scatter outside the machining center 1 or inside the magazine chamber 30.

The front wall 23 is provided with an opening 23a for loading and unloading the work W, a front door 26 for opening and closing the opening 23a, and a front door driving unit 26a for opening and closing the front door 26. The front door 26 is opened when the work W is carried into the processing chamber 20 and when the work W is carried out from the processing chamber 20, and prevents chips and coolant from scattering outside the machining center 1 during machining of the work W. Closed to do. The front door drive unit 26a is controlled by the controller 60. The loading and unloading of the work W into and out of the processing chamber 20 is performed by a robot arm (not shown) or an operator.

The partition 25 divides the processing chamber 20 and the magazine chamber 30. The partition 25 has an opening 27 so that the spindle 40 can move between the machining chamber 20 and the tool exchange position E (the position where the spindle 40 exchanges tools with the tool magazine 31) in the magazine chamber 30. It is provided. In this example, the opening 27 is a rectangle with the upper side open, but the shape is not limited to this as long as the main shaft 40 can pass through. When the opening 27 reaches the base portion 10, a pair of partitions 25 may be arranged on both sides of the opening 27 instead of one partition 25. That is, even a gap formed between a plurality of partitions 25 corresponds to the "opening" in the present invention.

The opening 27 is provided with a cover 28 that opens and closes the opening 27, and a cover driving unit 28a that drives the opening and closing of the cover 28. The cover 28 is opened when the tool T is replaced, and is closed to prevent chips and coolant from scattering into the magazine chamber 30 during machining of the work W. In this example, the cover 28 is a slide type cover, but it may be a roll type cover, a swivel type cover, or the like as long as the opening 27 can be opened and closed. The cover drive unit 28a is controlled by the controller 60.

[Magazine room 30]
The tool magazine 31 is housed in the magazine chamber 30. The tool magazine 31 is rotatably suspended via a support column 33 extending downward from the ceiling 32 of the magazine chamber 30, and can be rotated by driving a motor (not shown). As shown in FIG. 2, the tool magazine 31 has a disk shape, and slots S for holding tool holders H of a plurality of tools T are provided on the outer periphery at equal intervals in the circumferential direction. The rotation of the tool magazine 31 is controlled by the controller 60.

Although the tool magazine 31 has a disk shape here, the configuration of the tool magazine 31 is not limited to this. For example, a chain is hung around a single sprocket or a pair of sprockets, and a plurality of tool holder holders are attached to the chain. It may be a configuration.

Since the tool is exchanged between the spindle 40 and the tool magazine 31 in the slot S arranged in front of the opening 27, the position of the slot S is the tool exchange position E. The spindle 40 can enter the magazine chamber 30 from the processing chamber 20 through the opening 27 and move to the tool change position E.

As shown in FIG. 2, at a position opposite to the tool change position E with respect to the opening 27, that is, inside or near the center of the tool magazine 31 in the plan view of FIG. 2, radially toward the tool change position E. A pair of cleaning nozzles 34 capable of injecting coolant are provided.

The pair of cleaning nozzles 34 are separated from each other on both sides of a line extending in the Y-axis direction through the center of the tool changing position E, and the tool holder H is arranged at the tool changing position E. It is arranged at substantially the same height as the tapered portion TP of H. As a result, when the tool T and the tool holder H are arranged at the tool replacement position E, the coolant injected from the pair of cleaning nozzles 34 hits different positions of the tapered portion TP of the tool holder H.

Specifically, the coolant injected from one of the cleaning nozzles 34 hits the surface located on the right side of the cleaning nozzle 34 in addition to the front surface of the tapered portion TP of the tool holder H, and the coolant is injected from the other cleaning nozzle 34. The injected coolant hits not only the front surface of the tapered portion TP of the tool holder H but also the surface located on the left side when viewed from the cleaning nozzle 34. By making the coolant injected from the pair of cleaning nozzles 34 hit different positions of the tapered portion TP of the tool holder H in this way, a wide range of the tapered portion TP of the tool holder H, in this example, the entire tapered portion TP. To be washed.

Further, since the pair of cleaning nozzles 34 are arranged in front of the opening 27, when the tool holder H is not arranged at the tool changing position E, the coolant injected from the pair of cleaning nozzles 34 is placed at the tool changing position E. The main shaft 40 moving from the processing chamber 20 to the magazine chamber 30 and the tool holder H attached to the main shaft 40 are also hit through the opening 27 to perform these cleaning. The injection of coolant from the pair of cleaning nozzles 34 is controlled by the controller 60.

In this example, two cleaning nozzles 34 are provided, but three or more cleaning nozzles 34 may be provided. Further, the position of the cleaning nozzle 34 is not limited to the position shown in FIG. 2, and the tool holder H is arranged on a line extending in the Y-axis direction through the center of the tool exchange position E or arranged at the tool exchange position E. It may be arranged at a height different from that of the tapered portion TP of. Further, in addition to the positions of the pair of cleaning nozzles 34, the injection direction and the injection range may be changed.

The coolant in the clean tank 12 containing almost no foreign matter such as chips is sent to the pair of cleaning nozzles 34 by a pump (not shown). The coolant in the clean tank 12 is a coolant obtained by further filtering the coolant in the dirty tank 11 by a filter 13 such as a drum filter and a cyclone filter to a state in which foreign matter is substantially contained.

[Controller 60]
The controller 60 includes a CPU, a memory, an operation panel 61 as an input / output interface, and the like. The controller 60 controls each part of the machining center 1 (main shaft drive unit 50, cleaning nozzle 34, front door drive unit 26a, cover drive unit 28a, clamp unit 22, etc.) by executing the program described below.

FIG. 5 is a flowchart showing the contents of a program for machining the work W using the machining center 1. The execution subject of each step is the controller 60. Hereinafter, the contents of each step will be described in order.

In step S1, the controller 60 starts the machining cycle. The machining cycle refers to a series of machining on one work W after step S2, and the controller 60 starts the machining cycle when the work W is carried into the machining chamber 20. The work W is carried into the processing chamber 20 by a robot arm or an operator.

In step S2, the controller 60 controls the front door driving unit 26a and closes the front door 26. This prevents chips and coolant from scattering outside the machining center 1 during processing.

In step S3, the controller 60 drives a plurality of clamp portions 22 provided on the table 21 in a direction approaching the work W to engage with the work W and clamp the work W.

In step S4, the controller 60 resets the variable N indicating the number of the tool to be used to 1. In the following description, "tool T (N)" means the Nth tool to be used.

In step S5, the controller 60 starts machining using the tool T (N). Since the opening 27 of the partition 25 is closed by the cover 28, chips and coolant scattered during processing do not enter the magazine chamber 30.

In step S6, the controller 60 ends machining using the tool T (N).

In step S7, the controller 60 controls the spindle drive unit 50 and moves the spindle 40 to the cleaning start point. The cleaning start point is a predetermined position in the processing chamber 20, for example, a position 200 mm away from the opening 27 in front of the opening 27. Further, the controller 60 controls the cover drive unit 28a and opens the cover 28.

In step S8, the controller 60 activates the cleaning nozzle 34. Since neither tool holder H is arranged at the tool change position E at this timing, the coolant is injected toward the machining chamber 20 through the tool change position E and the opening 27. The coolant injection is continued until the cleaning nozzle 34 is stopped in step S14 or step S19.

In step S9, the controller 60 controls the spindle drive unit 50 and moves the spindle 40 to the tool change position E. At this time, the controller 60 determines the position of the spindle 40 so that the coolant injected from the cleaning nozzle 34 hits the gap G (see FIG. 4C) between the spindle 40 and the tool holder H attached to the spindle 40. In this example, the position in the Z-axis direction is adjusted. As a result, foreign matter such as chips that has entered the gap G between the spindle 40 and the tool holder H is prevented from being brought into the magazine chamber 30.

Foreign matter such as chips removed by the coolant and cleaning scatters into the processing chamber 20 through the opening 27, so that the foreign matter such as chips reappears in the tool holder H of the tool T to be installed in the magazine chamber 30. It does not adhere. Further, since the cleaning of the gap G is performed while the main shaft 40 is moved to the tool change position E, the cycle time is not deteriorated.

In step S10, the controller 60 controls the spindle drive unit 50, lowers the spindle 40, and returns the tool T mounted on the spindle 40 and the tool holder H thereof to the empty slot S arranged at the tool exchange position E. At the same time, the clamp member 42 in the spindle 40 is displaced in a direction approaching the tool holder H to unclamp the tool holder H from the spindle 40. When the tool holder H is unclamped and removed from the spindle 40, the controller 60 controls the spindle drive unit 50 and raises the spindle 40.

As a result, the tapered portion TP of the tool holder H of the used tool T (N) is exposed, the coolant injected from the cleaning nozzle 34 hits the tapered portion TP, and the tool holder of the used tool T (N). H is washed. Since the cleaning of the tool holder H of the used tool T (N) is performed in the flow of returning the tool T (N) to the tool magazine 31, the cycle time is not deteriorated.

In step S11, the controller 60 determines whether all the machining has been completed. The controller 60 advances the process to step S12 when all the processes are not completed, and proceeds to the process to step S17 when all the processes are completed.

In step S12, the controller 60 rotates the tool magazine 31 clockwise and moves the tool T (N + 1) to be used next and the tool holder H thereof to the tool change position E. The coolant is sprayed from the cleaning nozzle 34 toward the tool change position E and so as to hit the tapered portion TP of the tool holder H when the tool T (N + 1) and the tool holder H are arranged at the tool change position E. Therefore, the tool holder H of the tool T (N + 1) is cleaned when moving to the tool change position E.

Foreign matter such as chips removed by the coolant and cleaning scatters into the processing chamber 20 through the opening 27, so that the tool holder H of the tool T to be mounted in the holder mounting portion 41 of the spindle 40 or the magazine chamber 30 Foreign matter such as chips will not reattach to the surface. Further, since the cleaning of the tool holder H of the tool T (N + 1) is performed while the tool T (N + 1) and the tool holder H are moved to the tool replacement position E, the cycle time is not deteriorated.

In step S13, the controller 60 controls the spindle drive unit 50, lowers the spindle 40, and inserts the tool holder H of the tool T (N + 1) to be used next into the holder mounting portion 41 of the spindle 40. At this time, the controller 60 injects air from the air passage 44 to blow off foreign substances such as coolant and chips adhering to the holder mounting portion 41 and the tapered portion TP of the tool holder H, and the holder mounting portion 41 and the tool holder. Prevent foreign matter such as chips from being caught between the taper portion TP and the taper portion TP (air purge).

The tool holder H of the tool T (N + 1) has been cleaned in step S12, but by using such an air purge together, chips and the like between the holder mounting portion 41 and the tapered portion TP of the tool holder H can be removed. Effectively prevents foreign matter from getting caught. After that, the controller 60 displaces the clamp member 42 in the direction away from the tool holder H, and clamps the tool holder H of the tool T (N + 1) to the spindle 40.

In step S14, the controller 60 controls the spindle drive unit 50 and moves the spindle 40 to the cleaning start point. Further, the controller 60 stops the cleaning nozzle 34.

In step S15, the controller 60 controls the cover drive unit 28a, and the cover 28 closes the opening 27. This prevents chips and coolant scattered during subsequent processing using the tool T (N + 1) from entering the magazine chamber 30.

In step S16, the controller 60 adds 1 to the variable N indicating the number of the tool to be used, and returns the process to step S5.

On the other hand, when it is determined in step S11 that all the machining is completed, the controller 60 advances the process from step S11 to step S17.

In step S17, the controller 60 rotates the tool magazine 31 once in the opposite direction. Since the cleaning nozzle 34 is continuously operating from step S8, coolant is injected from the cleaning nozzle 34 toward the tool exchange position E, and the tool holder H passes through the tool exchange position E as the tool magazine 31 rotates. Cleaning is done. The “reverse direction” is a rotation direction opposite to the rotation direction of the tool magazine 31 in step S9, and is counterclockwise in the present embodiment. As a result, the tool holder H of all the tools T used for machining can be cleaned. In addition, since the way the coolant hits the tapered portion TP of the tool holder H changes from that at the time of tool replacement, even if there is a portion of the tapered portion TP that has not been sufficiently cleaned during tool replacement, such a portion Can also be thoroughly washed.

If the tool magazine 31 has an empty slot S or if only a part of the tool T is used for machining, it is not necessary to rotate the tool magazine 31 once, and a series of used tools T are placed at the tool change position E. The tool magazine 31 may be rotated as much as necessary to pass through (cleaning position). As a result, the cycle time can be shortened.

In step S18, the controller 60 controls the spindle drive unit 50, lowers the spindle 40, and transfers the tool holder H of the tool T (1) to be used first in the next machining cycle to the holder mounting portion 41 of the spindle 40. It is inserted and air purge is performed in the same manner as in step S13. Then, the controller 60 displaces the clamp member 42 in the direction away from the tool holder H, and clamps the tool holder H of the tool T (1).

In step S19, the controller 60 controls the spindle drive unit 50 and moves the spindle 40 to the cleaning start point. Further, the controller 60 controls the cover drive unit 28a and closes the opening 27 by the cover 28. This prevents scattered chips and coolant from entering the magazine chamber 30 when machining is performed using the tool T (1) in the next machining cycle.

In step S20, the controller 60 stops the cleaning nozzle 34.

In step S21, the controller 60 rotates the plurality of chucks 22 provided on the table 21 in a direction away from the work W to unclamp the work W.

In step S22, the controller 60 controls the front door drive unit 26a, opens the front door 26, and ends the machining cycle.

By the above processing, while machining the work W using a plurality of tools T (N), the gap G between the spindle 40 and the tool holder H attached to the spindle 40 is formed when the tool is replaced. Cleaning, cleaning of the tapered portion TP of the tool holder H of the used tool T (N), and cleaning of the tapered portion TP of the tool holder H of the tool T (N + 1) to be used next are performed, and these parts are cleaned. Is kept clean (steps S5 to S16).

Further, at the end of the machining cycle, the tool holder H of all the tools T used for machining was rewashed while rotating the tool magazine 31 in the opposite direction, so that the cleaning could not be completed by the cleaning at the time of tool replacement. The portion is washed (steps S17 to S22).

Subsequently, the action and effect of this embodiment will be described.

The machining center 1 according to the present embodiment partitions between the machining chamber 20 in which the work W is machined and the magazine chamber 30 in which the tool magazine 31 is housed, and has a partition 27 having an opening 27 through which the spindle 40 can pass. From the position opposite to the 25, the openable / closable cover 28 provided in the opening 27, and the tool changing position E for changing the tool between the spindle 40 and the tool magazine 31 as viewed from the opening 27, to the tool changing position E. A cleaning nozzle 34 capable of injecting coolant as a fluid toward the center is provided. Further, when the tool T was replaced, the cover 28 was opened, and the coolant was sprayed from the cleaning nozzle 34 toward the machining chamber 20 through the tool replacement position E and the opening 27.

According to this embodiment, the tool holder H attached / detached at the tool changing position E can be cleaned with coolant. Since the cover 28 is opened during cleaning, foreign matter such as coolant and chips removed by cleaning is scattered toward the processing chamber 20 through the opening 27, and the tools in the holder mounting portion 41 of the spindle 40 and the magazine chamber 30 are used. Foreign matter such as chips does not reattach to the holder H.

Therefore, according to the present embodiment, the tool holder H can be kept clean, and foreign matter such as chips can be prevented from being caught between the holder mounting portion 41 of the spindle 40 and the tool holder H. (Action and effect corresponding to claim 1).

Further, the tool holder H of the used tool T is cleaned by injecting fluid from the cleaning nozzle 34 when the spindle 40 removes the tool holder H of the used tool T at the tool change position E. And, it is possible to suppress the increase in the cycle time due to this washing (the action and effect corresponding to claim 2).

Further, when the spindle 40 attaches the tool holder H of the tool T to be used next at the tool change position E, the fluid is injected from the cleaning nozzle 34, so that the tool holder H of the tool T to be used next is cleaned. And, the increase in the cycle time due to this washing can be suppressed (the action and effect corresponding to claim 3).

Further, by injecting fluid from the cleaning nozzle 34 when the spindle 40 moves from the machining chamber 20 to the tool change position E, the spindle 40 that moves toward the magazine chamber 30 and the tool holder attached to the spindle 40 are ejected. H can be washed, and foreign matter such as chips adhering to these can be prevented from being brought into the magazine chamber 30. Moreover, it is possible to suppress an increase in the cycle time due to this washing (action and effect corresponding to claim 4).

Further, when the spindle 40 moves from the machining chamber 20 to the magazine chamber 30, the spindle 40 so that the fluid injected from the cleaning nozzle 34 hits the gap G between the spindle 40 and the tool holder H attached to the spindle 40. I tried to adjust the position of. As a result, foreign matter such as chips that has entered the gap G can be effectively removed (the action and effect corresponding to claim 5).

Further, air can be injected from the holder mounting portion 41, and when the spindle 40 mounts the tool holder H of the tool T to be used next at the tool changing position E, the air as the second fluid is supplied from the holder mounting portion 41. I tried to spray it. As a result, foreign matter such as chips adhering to the holder mounting portion 41 and the tool holder H is blown off by air, and foreign matter such as chips is further prevented from being caught between the holder mounting portion 41 and the tool holder H. (Effect corresponding to claim 6). Although air is used as the second fluid in the above embodiment, other fluids may be used.

Further, when all the machining on the work W is completed, the opening 27 is closed by the cover 28, and the tool magazine 31 is rotated in the direction opposite to the rotation direction of the tool magazine 31 at the time of tool replacement while injecting fluid from the cleaning nozzle 34. I made it. As a result, the tool holder H of all the tools T used for machining can be cleaned. In addition, since the way the coolant hits the tool holder H is different from that at the time of tool change, even if there is a part that could not be sufficiently cleaned at the time of tool change, it is possible to sufficiently clean such a part. It is possible (action and effect corresponding to claim 7).

Further, a plurality of cleaning nozzles 34 are provided, and the plurality of cleaning nozzles 34 are arranged apart from each other so that the fluid injected from each of them hits different positions of the tool holder H arranged at the tool exchange position E. Thereby, a wide range of the tool holder H can be cleaned (the effect corresponding to claim 8).

Although the embodiment of the present invention has been described above, the above-described embodiment is only one of the application examples of the present invention, and the purpose of limiting the technical scope of the present invention to the specific configuration of the above-described embodiment. is not it.

For example, in the present embodiment, the machining center 1 has been described as being a vertical type in which the main shaft 40 is arranged vertically, but the machining center 1 to which the present invention is applicable is not limited to the vertical type, and the main shaft 40 is arranged horizontally. It is a horizontal type and is applicable.

Further, the above-mentioned action and effect of the present embodiment become remarkable when a light metal such as aluminum having a relatively light specific gravity is used as the work W and a water-soluble cutting fluid is used as the coolant. Not limited to.

Further, in the above embodiment, the coolant is continuously injected from the cleaning nozzle 34 while the tool is changed, but the coolant may be injected intermittently. Specifically, when the tool holder H of the used tool T (N) is removed from the spindle 40 until the spindle 40 is moved to the tool change position E (step S9) (step S10), next to the spindle 40. The coolant may be injected only at a specific time such as when the tool holder H of the tool T (N + 1) used for the tool T (N + 1) is attached (step S13).

Further, in the above embodiment, the gap G between the spindle 40 and the tool holder H of the used tool T (N) mounted on the spindle 40, the tool holder H of the used tool T (N), and the following. Although all the tool holders H of the tool T (N + 1) used for the tool T (N + 1) are cleaned, it is not always necessary to perform all the cleaning, and the specifications of the machining center 1 (required cleaning level, relationship with other cleaning devices). Etc.), the necessary cleaning may be performed in any combination.

1: Machining center 20: Machining center 20: Machining chamber 23a: Opening 25: Partition 27: Opening 28: Cover 30: Magazine chamber 31: Tool magazine 34: Cleaning nozzle 40: Spindle 41: Holder mounting part G: Gap H: Tool holder T: Tool W : Work E: Tool change position

Claims (8)

It ’s a machining center,
A spindle that can attach the tool holder of the tool to the holder mounting part,
A partition having an opening through which the main shaft can pass while partitioning between a processing chamber in which machining to a work is performed and a magazine chamber in which a tool magazine is housed, and a partition.
An openable cover provided in the opening and
A cleaning nozzle capable of injecting fluid from a position opposite to the tool changing position where the tool is changed between the spindle and the tool magazine as viewed from the opening toward the tool changing position.
With
When the tool is replaced, the cover is opened and a fluid is injected from the cleaning nozzle toward the machining chamber through the tool replacement position and the opening.
A machining center characterized by this. The machining center according to claim 1.
The cleaning nozzle ejects fluid when the spindle removes the tool holder of a used tool at the tool change position.
A machining center characterized by this. The machining center according to claim 1 or 2.
The cleaning nozzle ejects fluid when the spindle attaches the tool holder of the next tool to be used at the tool change position.
A machining center characterized by this. The machining center according to any one of claims 1 to 3.
The cleaning nozzle injects fluid as the spindle moves from the machining chamber to the tool change position.
A machining center characterized by this. The machining center according to claim 3.
When the spindle moves from the processing chamber to the magazine chamber, the position of the spindle is adjusted so that the fluid injected from the cleaning nozzle hits the gap between the spindle and the tool holder attached to the spindle. ,
A machining center characterized by this. The machining center according to any one of claims 1 to 5.
A second fluid can be injected from the holder mounting portion.
When the spindle attaches the tool holder of the tool to be used next at the tool exchange position, the second fluid is injected from the holder attachment portion.
A machining center characterized by this. The machining center according to any one of claims 1 to 6.
When all the machining on the work is completed, the opening is closed by the cover, and the tool magazine is rotated in the direction opposite to the rotation direction of the tool magazine at the time of tool replacement while injecting fluid from the cleaning nozzle.
A machining center characterized by this. The machining center according to any one of claims 1 to 7.
A plurality of the cleaning nozzles are provided.
The plurality of cleaning nozzles are spaced apart so that the fluid jetted from each of them hits a different position of the tool holder arranged at the tool exchange position.
A machining center characterized by this.

Images