JP2016215317A - Machining center - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to inject a liquid outside at a higher pressure by use of a cleaning tool.SOLUTION: In a machining center 1, a cleaning tool ST comprises: an installation part 302 which is to be installed onto a spindle 6; a second flow channel 35 which is formed in the cleaning tool ST and flows a cleaning liquid; and a connection part 30 for connecting an outlet port 12 of a first flow channel 10 and the second flow channel 35. When the installation part 302 of the cleaning tool ST is installed onto the spindle 6, the connection part 30 of the cleaning tool ST is connected to the outlet port 12 at a position approximate to the spindle 6, whereby the first flow channel 10 and the second flow channel 35 are communicated with each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a machining center provided with a cleaning tool.

  Conventionally, the disclosed machining center of Patent Document 1 has a tool magazine for detachably arranging various tools and a rotatable main shaft for mounting various tools including a cleaning tool. The machining center also has a base channel for flowing a cleaning liquid from the outside of the spindle to the inside of the spindle. Further, in a general machining center, a rotating portion provided between the base flow path and the main shaft and connected to various tools for rotating the cleaning liquid supplied from the base flow path (fixed piping) inside the main shaft. A rotary joint for supplying to In addition, a general cleaning tool includes a connecting portion for connecting to the base flow path together with the main shaft, and a tool for forming a cleaning liquid through the rotary joint formed inside the cleaning tool from the connecting portion. A flow path and a nozzle for ejecting a cleaning liquid to the outside with a high pressure through the tool flow path. Further, in a general rotary joint, an O-ring, a seal ring, and the like for blocking the liquid flow are disposed near the boundary between the fixed portion and the rotating portion. By doing so, the leakage to the drive part of the main shaft is suppressed when the liquid is applied under pressure. In this way, the cleaning liquid supplied from the base flow path outside the spindle through the rotary joint is sent to the nozzle through the tool flow path and sprayed to the outside at a high pressure to clean the surface of the workpiece widely and efficiently. I was able to.

JP2011-125969A

  In the above machining center, when the liquid supplied from the base flow path exceeds a certain pressure, when it flows into the rotary joint, it cannot withstand that pressure and may leak to the drive part inside the spindle. .

  The present invention has been made in view of the above-described problems, and a problem to be solved by the present invention is to enable a liquid to be ejected to the outside at a higher pressure using a cleaning tool.

  The machining center of the present invention includes a main shaft for selectively attaching various tools including a cleaning tool capable of ejecting a cleaning liquid, and a tool magazine in which various tools for attaching to the main shaft are arranged. The machining center can automatically exchange various tools between the tool magazine and the spindle. The machining center also includes a first flow path for flowing a cleaning liquid through the cleaning tool, and an outlet of the first flow path formed at a position close to the main shaft. The cleaning tool includes a mounting portion for mounting on the main shaft, a second flow path for flowing a cleaning liquid formed inside the cleaning tool, an outlet of the first flow path, and a second flow path. And a spout for ejecting the cleaning liquid to the outside at a high pressure via the second flow path. At this time, when the mounting portion for the cleaning tool is mounted on the main shaft, the connecting portion of the cleaning tool is connected to the outlet near the main shaft, and the first flow path and the second flow path are communicated.

  In this case, while the cleaning tool is mounted on the main shaft, the first flow path (outlet) and the second flow path are connected by the connecting portion at a position close to the main shaft, and the flow path for flowing the cleaning liquid communicates. In addition, the flow path and the connection portion are arranged so that the flow path does not pass through the inside of the main shaft but is detoured. For this reason, the liquid can be ejected to the outside at a higher pressure by using a cleaning tool.

  Further, the machining center includes a support member for supporting various tools attached to the main shaft, and the support member may be movable in a perspective direction with respect to a connection portion of the cleaning tool attached to the main shaft. preferable. At this time, when the mounting portion of the cleaning tool is mounted on the main shaft, the support member is moved, and the vicinity of the connection portion of the cleaning tool is abutted against and supported by the support member.

  In this case, when the cleaning tool mounting portion is mounted on the main shaft, the cleaning tool mounting portion is supported by the movable support member in the vicinity of the cleaning tool connection portion in a superposed state. For this reason, in addition to being supported near the connecting part of the cleaning tool by the support member in addition to being supported by the mounting part of the cleaning tool on the spindle, when the liquid is sprayed to the outside at high pressure, there is rattling near the connecting part. And vibrations can be suppressed, and leakage of the cleaning liquid in the vicinity of the connecting portion can be suppressed. In addition, since it is supported by the support member in the vicinity of the connecting portion of the cleaning tool and overlapped, the cleaning liquid that flows to the cleaning tool is further suppressed by suppressing rattling and vibration in the vicinity of the connecting portion. Leakage can be suppressed. Further, a cleaning liquid can be sprayed to the outside at a higher pressure using a cleaning tool.

  In this machining center, the cleaning tool preferably includes a positioning portion that forms a protrusion formed upward, and the positioning portion is preferably disposed at a position between the mounting portion and the connection portion. Further, at this time, when the cleaning tool is mounted on the main shaft, the position is determined by inserting the protrusion into the concave portion provided in the vicinity of the main shaft. In this case, since the positioning portion having the protrusion can be inserted into the concave portion, the positions of the main shaft and the connecting portion can be easily aligned and attached to each other.

  According to the present invention, a liquid can be ejected to the outside at a higher pressure using a cleaning tool.

It is a side view of a machining center concerning one embodiment of the present invention. It is a bottom view of the machining center shown in FIG. FIG. 2 is a front view of the machining center shown in FIG. 1. It is the side view which expanded and showed the tool for washing | cleaning partially. It is the perspective view which expanded and showed the tool for washing | cleaning.

  An embodiment of the present invention will be described. The machining center 1 of the present embodiment is a machine tool having a function of performing milling, drilling, centering and tapping, and cleaning a workpiece or the like as necessary. The machining center 1 can be controlled by a numerical control (NC) program, and a plurality of types of various tools KT (tools) can be automatically replaced. Note that the X axis, the Y axis, and the Z axis shown in each figure are orthogonal to each other, the Z axis direction indicates the vertically upward direction, and the X axis direction and the Y axis direction indicate the horizontal direction.

  A machining center 1 shown in FIG. 1 includes a tool magazine 2 for detachably arranging various tools KT, a tool base 4 for attaching the tool magazine 2, and a spindle 6 for attaching various tools KT. Further, the machining center 1 includes an autochanger (not shown) that allows various tools KT to be removed from the tool magazine 2 and attached to the spindle 6 to be replaced. Further, the machining center 1 has a first flow path 10 for flowing a cleaning liquid, an outlet 12 formed as an outlet of the first flow path 10, and various tools KT attached to the main shaft 6 in a perspective direction. And a movable support member 14. In addition, a work jig 20 for supporting the work W from below and a table 22 for placing the work W and the work jig 20 are provided as necessary. The work jig 20 and the table 22 are arranged below various tools KT attached to the main shaft 6 in a state where the main shaft 6 is not driven.

  A tool base 4 shown in FIG. 1 forms a main body portion of the machining center 1 and is a box-shaped portion surrounded by a frame surface. Inside the tool base 4, a first flow path 10 is arranged from the outside of the main shaft 6 to a position close to the main shaft 6, and the outlet of the first flow path 10 is located at the lower end side of the tool base 4 and at a position close to the main shaft 6. The outflow port 12 which is is arrange | positioned. The first flow path 10 is a metal tubular pipe. The first flow path 10 passes through the inside of the tool base 4 and is guided to the outside from the lower end of the tool base 4. The flow path is bent from the outside, and the tip enters from the outside (side part) of the positioning member 42 (described later) provided at the lower end of the tool base 4 to the inside and is arranged from the inside to the lower end of the positioning member 42. ing. The outflow port 12 is arrange | positioned at the arrange | positioned lower end. A tool magazine 2 is attached and arranged on the side surface of the tool base 4. A main shaft 6 is disposed below the tool base 4.

  As shown in FIG. 2, the main shaft 6 is a portion formed in a substantially columnar shape. Various tools KT are attached to the main shaft 6 and are rotated about the axis I of the main shaft 6 shown in FIG. 4 by a main shaft motor (not shown). It is possible. The upper end of the main shaft 6 is attached to the lower end of the tool base 4 as shown in FIG. A Z-axis motor (not shown) that enables the main shaft 6 to move in the Z-axis direction is disposed at the lower end of the attached tool base 4.

  The tool magazine 2 shown in FIG. 1 is formed in a substantially disk shape, and a plurality of various tools KT including a cleaning tool ST for injecting a cleaning liquid are arranged on the outer periphery thereof. The cleaning tool ST is a tool that can eject a cleaning liquid and cleans the workpiece W (workpiece) that has been cut or ground. In the various tools KT, a processing tool T is arranged as a tool other than the cleaning tool ST. The processing tool T is a cutting tool such as an end mill, a drill, or a reamer for cutting and grinding by rotating the main shaft. The tool magazine 2 has a rotation axis J. The tool magazine 2 is rotated about the rotation axis J under the control of the program, the processing tool T or the cleaning tool ST is rotated to a predetermined position, and the processing tool T is driven by an autochanger (not shown). Alternatively, the cleaning tool ST is removed from the tool magazine 2 and moved to the main shaft 6. Along with the movement, the processing tool T or the cleaning tool ST is attached to the main shaft 6.

  The autochanger (not shown) has a function of removing the cleaning tool ST or the processing tool T from the tool magazine 2 and moving it to the spindle 6 under the control of the program as described above. Further, the autochanger has a function of removing the cleaning tool ST or the processing tool T attached to the main shaft 6 under the control of the program, and moving it back to the tool magazine 2. The autochanger has a holding part (not shown) for carrying the cleaning tool ST or the processing tool T at both ends, and a shaft (not shown) having a rotation mechanism at the center. Accordingly, one processing tool T or cleaning tool ST is held on one end side, and one processing tool T or cleaning tool ST is held on the other end side, and simultaneously rotated by rotating about an axis. The processing tool T or the cleaning tool ST arranged in the tool magazine 2 can be exchanged with the processing tool T or the cleaning tool ST attached to the main shaft 6.

  As shown in FIGS. 4 and 5, the cleaning tool ST includes a connection portion 30, an inflow port 32, a second flow path 35, an ejection port 39, a mounting portion 302, a protrusion portion 36, and a protrusion 34. Is provided. As shown in FIGS. 4 and 5, the cleaning tool ST is formed in a substantially triangular shape in a side view, and is provided with a through hole 304 in which a substantially central portion is hollowed out in a substantially triangular shape. The cleaning tool ST is provided with a cylindrical nozzle 38 at its lower end for ejecting liquid at high speed by pressure.

  The mounting part 302 is a part for mounting the cleaning tool ST on the main shaft 6 as shown in FIG. As shown in FIG. 5, the mounting portion 302 is tapered toward the tip (upper end), and is provided with a hole 306 a at the tip, and has a substantially triangular shape when viewed from the side. As shown in FIG. 4, a pull stud 306 is attached to the tip of the tip 306 so as to be screwed into the hole 306 a and fixed to the main shaft 6. The pull stud 306 is formed in a substantially cylindrical shape as a whole, and its tip end portion swells, but may be formed in another shape. The mounting portion 302 is supported by being fitted into a tapered hole (not shown) along the center line of the main shaft 6.

  The connection part 30 shown in FIGS. 1 and 4 is a part for connecting to the outlet 12 disposed in the vicinity of the main shaft 6. The connecting portion 30 is formed in a substantially cylindrical shape, and is disposed at the upper end of the cleaning tool ST when attached to the main shaft 6. The upper end of the connecting portion 30 is provided with an inflow port 32 at a substantially central portion, and is in contact with and connected to the outflow port 12 disposed at the lower end of the tool base 4.

  The inflow port 32 is formed in a substantially circular shape as shown in FIG. 5, and is an inlet for flowing in the cleaning liquid that has flowed out from the outflow port 12. As shown in FIG. 4, the inflow port 32 is opposed to and opposed to the outflow port 12 of the tool base 4 disposed on the upper side, whereby the first flow path 10 and the second flow path 35 are communicated with each other. .

  As shown in FIG. 4, the second flow path 35 is formed from the inlet 32 to the inside of the cleaning tool ST, and is a flow path for flowing a cleaning liquid. The path of the second flow path 35 starts from the inflow port 32, passes through the inclined portion 31 of the cleaning tool ST, and is disposed up to a later-described ejection port 39. The inclined portion 31 is a cylindrical portion formed inside by the second flow path 35 and is a rod-shaped portion formed substantially parallel to the flow direction of the second flow path 35. The second flow path 35 is arranged linearly from the inlet 32 of the connecting portion 30 to the lower end of the cleaning tool ST, and the flow path direction of the second flow path 35 and the axis I direction of the main shaft 6 are inclined. Arranged in a state. An inclination angle θ between the flow path direction and the direction of the axis I along the center line of the main shaft 6 is arbitrarily set. That is, the inclined portion 31 and the rod-shaped lower end shaft portion 33 formed from the substantially center to the lower end of the portion from the upper end of the mounting portion 302 along the axis I direction of the main shaft 6 to the ejection port 39 are arranged in an inclined state. The inclination angle θ between the longitudinal direction of the inclined portion 31 and the longitudinal direction of the lower end shaft portion 33 is arbitrarily set. On the other hand, the upper end of the inclined portion 31 and the upper end of the lower end shaft portion 33 are connected by a connecting portion X. Above the connecting portion X, a projection 34 (extended portion 37) described later is disposed. The second flow path 35 is bent at the upper end side so that the flow path is bent upward, and the bent tip is formed upward and connected to the first flow path 10. Further, the second flow path 35 is bent at the lower end side so that the flow path is bent downward, and the bent tip is formed downward and led to the jet port 39.

  4 and 5 is formed in a substantially circular shape, and is an outlet for ejecting a cleaning liquid to the outside at a high pressure via the second flow path 35. The spout 39 is disposed at the lower end of the cleaning tool ST when attached to the main shaft 6. When the cleaning liquid flows from the outlet 12 on the tool base 4 side into the inlet 32, the outlet of the nozzle 38 shown in FIG. 2 attached to the outlet 39 via the second flow path 35. It is ejected to the outside at a high pressure from 38a.

  The protrusion 34 is a part for positioning the cleaning tool ST as shown in FIG. The protrusion 34 is a portion that is formed in a substantially cylindrical shape upward from an extended portion 37 that extends from the lower end (base) of the mounting portion 302 toward the connection portion 30, and is connected to the mounting portion 302. It is arrange | positioned between the parts 30. The protrusion 34 is fitted into the recess 42a on the tool base 4 side, so that the connection portion 30 and the mounting portion 302 are positioned. The recess 42 a is formed in the positioning member 42 provided at the lower end of the tool base 4. The positioning member 42 is disposed above the connection portion 30 and the protrusion 34 of the cleaning tool ST. The recess 42a is formed to open downward at the lower end of the positioning member 42.

  As shown in FIG. 1, the protruding portion 36 protrudes in the horizontal direction from the vicinity of the connecting portion 30 of the cleaning tool ST toward the support member 14 described later, and has a substantially rectangular parallelepiped shape with a part of the lower surface cut away. Is formed. The protrusion 36 shown in FIG. 4 has an inclined lower surface 36a that forms a notched lower end surface. The inclined lower surface 36a of the projecting portion 36 is a portion for overlapping and supporting the upper surface of the extending portion 16 described later.

  As shown in FIG. 1, the support member 14 is disposed on the lower end side of the tool base 4, and is movable in the perspective direction by the cylinder 18 with respect to the cleaning tool ST or the processing tool T attached to the main shaft 6. . The support member 14 is formed to extend in the horizontal direction below the main shaft 6 side, and includes an extension portion 16 for supporting the cleaning tool ST. The support member 14 is moved toward the cleaning tool ST by moving in a direction approaching the cleaning tool ST. When the mounting portion 302 of the cleaning tool ST is mounted on the main shaft 6 by the autochanger, the support member 14 is moved in the positive direction of the X axis shown in FIG. The projecting portion 36 of the working tool ST is brought into contact with and placed on the upper side of the extended portion 16 of the support member 14 and is supported by the upper surface of the extended portion 16 of the support member 14.

  The extending portion 16 shown in FIGS. 1 and 2 has a wedge shape that narrows toward the end of the extending portion. The extending portion 16 having a wedge shape has a protruding portion from the end of the extending portion 16 when the cleaning tool ST is attached to the main shaft 6 and the support member 14 is moved toward the protruding portion 36 of the cleaning tool ST. The upper and lower portions of the lower surface 36 are in contact with a part of the lower surface 36 and are superposed vertically, and the projecting portion 36 is supported on the extended portion 16 in a state of being placed thereon.

  The present embodiment has the following operational effects. The machining center 1 of the present embodiment includes a first flow path 10 for flowing a cleaning liquid to the cleaning tool ST, and an outlet 12 of the first flow path 10 formed at a position close to the main shaft 6. The cleaning tool ST is mounted in the main shaft 6, a mounting portion 302, a second flow path 35 for flowing a cleaning liquid formed in the cleaning tool ST, and an outlet of the first flow path 10. 12 and a connection portion 30 for connecting the second flow path 35 to each other. Further, the cleaning tool ST includes an ejection port 38a (nozzle 38) for ejecting a cleaning liquid to the outside at a high pressure via the second flow path 35. At this time, when the mounting portion 302 of the cleaning tool ST is mounted on the main shaft 6, the connecting portion 30 of the cleaning tool ST is connected to the outlet 12 at a position close to the main shaft 6, and the first flow path 10 and the second flow The path 35 is communicated.

  By doing so, while the cleaning tool ST is mounted on the main shaft 6, the first flow path 10 (outlet 12) and the second flow path 35 are connected by the connecting portion at a position close to the main shaft 6, and the cleaning liquid The flow path for flowing is communicated. At this time, the flow path and the connecting portion 30 are arranged so that the flow path does not pass through the inside of the main shaft 6 and is detoured. For this reason, when the liquid is sprayed to the outside with a high pressure using a cleaning tool, the main shaft 6 is cleaned inside the main shaft 6 of the machining center 1 while the cleaning tool ST having a flow path is mounted inside the cleaning tool ST. The liquid for use can be prevented from leaking out. Therefore, the liquid can be ejected to the outside at a higher pressure by using a cleaning tool.

  In the machining center 1, the cleaning tool ST is mounted on the spindle 6 between the tool magazine 2 and the spindle 6 by an automatic exchange function. By doing so, it is possible for the cleaning tool ST to connect and communicate the flow path between the flow paths other than the inside of the main shaft 6 by the automatic exchange function. For this reason, while utilizing the automatic exchange function of the various tools KT, the cleaning liquid is not leaked into the main shaft 6 at a position other than the main shaft 6 (a position close to the main shaft), and is bypassed along with the mounting of the cleaning tool ST. Can be connected.

  Further, the machining center 1 includes a support member 14 for supporting various tools KT attached to the main shaft 6, and the support member 14 is close to the connection portion 30 of the cleaning tool ST attached to the main shaft 6. It is movable in the direction. At this time, when the mounting portion 302 of the cleaning tool ST is mounted on the main shaft 6, the support member 14 is moved, and the vicinity of the connection portion 30 of the cleaning tool ST is brought into contact with the support member 14 and overlapped. Supported in state.

  By doing so, when the mounting portion 302 of the cleaning tool ST is mounted on the main shaft 6, it is in contact with and superposed on the movable support member 14 in the vicinity of the connecting portion 30 of the cleaning tool ST. Supported by For this reason, in addition to being supported by the mounting portion 302 of the cleaning tool ST on the spindle 6, the support member 14 is supported in the vicinity of the connection portion 30 of the cleaning tool ST. It is possible to suppress rattling and vibration near the connection portion 30. Therefore, the liquid can be ejected to the outside at a higher pressure using a cleaning tool. In addition, leakage of the cleaning liquid in the vicinity of the connection portion 30 can be suppressed. Furthermore, since it is supported by the support member 14 in the vicinity of the connecting portion 30 of the cleaning tool and overlapped, it is further prevented from rattling and vibration in the vicinity of the connecting portion 30 and flows to the cleaning tool. The leakage of liquid for use can be suppressed.

  In the machining center 1, the support member 14 includes an extended portion 16 formed to extend, and the extended portion 16 has a wedge shape. Further, the cleaning tool ST is formed so as to protrude in the horizontal direction from the vicinity of the connecting portion 30 and includes a protruding portion 36 for overlapping with a wedge-shaped portion. Further, when the mounting portion 302 of the cleaning tool ST is mounted on the main shaft 6 by the autochanger, the support member 14 is moved, and the extending portion 16 of the support member 14 is overlapped below the protruding portion 36 of the cleaning tool ST. The projecting portion 36 is placed on the upper side of the extended portion 16 and supported.

  By doing so, in the state where the protruding portion 36 of the cleaning tool ST is placed on the upper side of the extending portion 16 of the support member 14, the extending portion 16 and the protruding portion 36 overlap with each other so that the cleaning tool ST is firmly formed. I can support it. Therefore, rattling and vibration near the connecting portion 30 can be further suppressed, and leakage of the cleaning liquid flowing through the cleaning tool can be suppressed.

  In the machining center 1, the cleaning tool ST includes a protrusion 34 (positioning portion) that forms a protrusion formed upward, and the protrusion 34 is located at a position between the mounting portion 302 and the connection portion 30. When the cleaning tool ST is mounted on the main shaft 6, the protrusion 34 is positioned by inserting it into the recess 42 a. By doing so, since the protrusion 34 is inserted into the recess 42a provided at a position close to the main shaft 6 and positioned, the positions of the main shaft 6 (mounting portion 302) and the connecting portion 30 can be easily aligned and attached easily.

  The machining center 1 of the present embodiment is not limited to the above-described embodiment, and can be implemented in other forms. In the present embodiment, the machining center 1 is controlled and applied by the NC program, but is not limited thereto. You may apply by performing by control of another program.

  In the machining center 1 of the present embodiment, the tool magazine 2 is applied in a disk shape, but the present invention is not limited to this. Other shapes of tool magazines may be applied.

  In the machining center 1 of the present embodiment, the nozzle 38 is provided and applied, but the present invention is not limited to this. Instead of the nozzle 38, an extension nozzle made of metal or resin having a narrow width of the main body portion and the flow path relative to the nozzle 38 may be used.

DESCRIPTION OF SYMBOLS 1 Machining center 2 Tool magazine 4 Tool base 6 Main axis | shaft 10 1st flow path 12 Outlet 14 Support member 16 Extension part 18 Cylinder 20 Work jig | tool 22 Table 30 Connection part 31 Inclination part 32 Inlet part 33 Lower end axial part 34 Protrusion 35 Second Flow path 36 Protruding portion 37 Extending portion 38 Nozzle 38a Spout port 39 Spout port 42a Concave portion 42 Positioning member 302 Mounting portion 304 Through hole 306 Pull stud KT Various tools ST Cleaning tool T Processing tool W Work I Axis X Connecting portion

Claims (3)

A spindle for selectively attaching various tools including a cleaning tool capable of ejecting cleaning liquid;
A tool magazine for arranging the various tools for mounting on the spindle, and a machining center capable of automatically exchanging the various tools between the tool magazine and the spindle,
A first flow path for flowing the cleaning liquid through the cleaning tool;
An outlet of the first flow path formed at a position close to the main shaft,
The cleaning tool includes a mounting portion for mounting on the main shaft, a second flow path formed inside the cleaning tool for flowing the cleaning liquid, and the outlet of the first flow path. And a connecting portion for connecting the second flow path, and a jet outlet for ejecting the cleaning liquid to the outside at a high pressure through the second flow path,
When the mounting portion of the cleaning tool is mounted on the main shaft, the connection portion of the cleaning tool is connected to the outlet at a position close to the main shaft, and the first flow path and the second flow path Is a machining center that communicates with each other. A support member for supporting the cleaning tool attached to the main shaft;
The support member is movable in a perspective direction with respect to the connection portion of the cleaning tool attached to the main shaft,
When the mounting part of the cleaning tool is mounted on the main shaft, the support member is moved, and the vicinity of the connection part of the cleaning tool is in contact with and superposed on the support member. The machining center according to claim 1. The cleaning tool includes a positioning portion that forms a protrusion formed upward,
The positioning portion is disposed at a position between the mounting portion and the connecting portion, and when the cleaning tool is mounted on the main shaft, the protrusion is inserted into a recess provided at a position close to the main shaft. The machining center according to claim 1 or 2, wherein the position is determined.

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