JP2015066607A - Main shaft end face cleaning device for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a main shaft end face cleaning device which can easily clean a main shaft end face by an air blow system even if a main shaft itself does not have an air supply function.SOLUTION: A cleaning device for a main shaft end face 5 of a main shaft 3 as a seating surface for a specified tool holder includes a body part 9 and a support ring 10. The body part 9 is coupled to a taper hole 4 on a main shaft side. Air from a compression air supply source 29 is supplied into a chamber part 16 of he body part 9 via a joint member 20 different from a joint member 23 which further serves as an on-off valve . Air in the chamber part 16 is injected to a gap G including the main shaft end face 5 from plural air injection ports 18a. Thus, the main shaft end face 5 can be cleaned by an air blow system.

Description

  The present invention relates to a cleaning device for cleaning a spindle end surface of a machine tool represented by a machining center by a so-called air blow system.

  A predetermined cutting tool is mounted on the spindle of the spindle head of a machine tool via a tool holder, and at the same time the taper hole on the spindle side and the taper shank portion on the tool holder side are taper-coupled, the end surface of the spindle is The tool holder may be seated on the end surface of the main shaft as a seating surface. In such a case, it is necessary to avoid the attachment of fine chips or the like to the spindle end face, and a technique for cleaning the spindle end face as described in Patent Document 1 has been proposed as a means therefor. Yes.

  In the technique described in Patent Document 1, an air discharge port is formed in the spindle end surface itself, and the air blown out from the air discharge port is reflected on the seating surface on the tool holder side, and the reflected air pressure is used. Apply air blow to the spindle end face (see Fig. 6), or install a cleaning holder equivalent to the tool holder on the spindle and make it between the spindle end face and the flange of the tool holder from the air injection passage formed in the cleaning holder. Air is blown by injecting air into the gap (see FIG. 12).

JP 2010-89181 A

  However, since the technique described in Patent Document 1 is a system in which air is supplied from the spindle side of the machine tool, the initial purpose is achieved when the spindle itself does not have an air supply function. I can't. In other words, when applied to existing equipment in which the spindle itself does not have an air supply function, there is a problem that the intended purpose cannot be achieved unless major equipment modifications are made.

  The present invention has been made paying attention to such a problem, and in particular, when applied to an existing facility in which the spindle itself does not have an air supply function, for the intended purpose without carrying out a major facility modification. The present invention provides a spindle end face cleaning device that can easily clean a spindle end face.

  The present invention is an apparatus for cleaning a spindle end surface that is detachably mounted in place of a tool holder on a spindle head side spindle on which the tool holder is mounted, and on which the tool holder is seated when the tool holder is mounted. And a main body detachable with respect to the main shaft, and an extrapolating member rotatable relative to the main body.

  The main body includes a taper portion that can be taper-coupled with the taper hole of the main shaft, a flange portion having a flange surface that faces the end surface of the main shaft when the taper hole and the taper portion are taper-coupled, and the flange surface. An air injection port that is formed to open and blows compressed air toward the end face of the main shaft.

  On the other hand, the extrapolation member allows the relative rotation between the main body portion and the air introduction port connected to the air supply port on the spindle head side when the tapered hole and the tapered portion are joined to each other. An air supply port for supplying compressed air to the upstream side of the injection port.

  According to the present invention, the spindle end face can be cleaned by a so-called air blow system by supplying compressed air to the main body of the cleaning device simply by providing an air supply port on the non-rotating spindle head supporting the spindle. Therefore, the spindle end face cleaning function in the existing equipment can be added at low cost.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the spindle end surface cleaning apparatus which concerns on this invention, and is sectional explanatory drawing which shows the relationship between a spindle and the cleaning apparatus with which it is mounted | worn. Cross-sectional explanatory drawing which shows the state which mounted | wore the main shaft with the cleaning apparatus from the state of FIG. FIG. 3 is an enlarged explanatory view of a joint portion between joint members in FIG. 2. The principal part expansion explanatory drawing of FIG. 2 containing the connection part of the joint members of FIG. The enlarged arrow line view along the AA line of FIG.

  1 to 5 show a more specific form for carrying out the spindle end surface cleaning device for a machine tool according to the present invention. In particular, FIG. 1 shows a state before the cleaning device 8 is mounted on the spindle 3. Shows the state in which the cleaning device 8 is mounted on the main shaft 3. Further, FIG. 3 shows an enlarged view of the main part of FIG.

  As shown in FIG. 1, a spindle (spindle) 3 is rotatably supported by a spindle head 1 of a machine tool having an automatic tool change mechanism (ATC mechanism) represented by a machining center, for example, via a plurality of bearings 2. Has been. In addition to a tapered hole 4 serving as a taper coupling surface with a tool holder (not shown), a spindle end surface 5 serving as a seating surface for a specific tool holder is formed at the tip of the main shaft 3. Further, a collet 7 is disposed along with the draw bar 6 on the back side of the tapered hole 4.

  Here, the taper shank portion 12 and the pull stud 13 as the taper portion of the main body portion 9 in the cleaning device 8 shown in FIG. 1 are those of a tool holder (not shown) to be detachably attached to the main shaft 3. It is a common specification. The details of the cleaning device 8 will be described later. Therefore, if it is assumed that the taper shank portion 12 and the pull stud 13 of the cleaning device 8 shown in FIG. 1 are of a specific tool holder, the taper shank portion 12 is inserted into the taper hole 4 on the main shaft 3 side and then the draw bar is inserted. 1, when the collet 7 grips the pull stud 13 and pulls the tapered shank portion 12 toward the tapered hole 4, the tapered hole 4 on the main shaft 3 side and the tapered shank portion 12 are tapered. They will be combined (see FIGS. 2 and 3). With this, the specific tool holder is firmly attached to the main shaft 3.

  A cleaning device 8 shown in FIG. 1 includes a main body 9 in which a body 11 has a substantially cylindrical shape, and a support ring 10 as an approximately annular extrapolation member that is externally inserted into the main body 9 so as to be relatively rotatable. , Is composed of.

  The main body portion 9 includes an annular flange portion 14 together with the tapered shank portion 12 and the pull stud 13 described above in addition to the body portion 11, and the tapered shank portion 12, the pull stud 13 and the flange portion 14 are The specifications are the same as those of the tool holder described above. Therefore, a circumferential groove 15 is formed in the flange portion 14, and this circumferential groove 15 functions as a grip portion when gripping the cleaning device 8 by an arm of an ATC mechanism (not shown).

  Further, as shown in FIG. 2, when the main body 9 is inserted into the tapered hole 4 on the main shaft 3 side, the pull stud 13 is pulled in by the draw bar 6 and the collet 7 as described above, so that the main body 9 side The tapered shank portion 12 is taper-coupled with the tapered hole 4 on the main shaft 3 side. At this time, as shown in an enlarged view in FIG. 3, there is a predetermined gap between the main shaft end surface 5 on the main shaft 3 side and the flange surface 14 a of the flange portion 14 that faces the main shaft end surface 5 in the flange portion 14. The gap Q is set to be secured.

  The body 11 of the main body 9 shown in FIG. 1 has a hollow cylindrical shape, and its internal space is a chamber 16 sealed with a lid 15. A plurality of air passages 17 are formed in the cylindrical body portion 11 in the circumferential direction so as to penetrate the inner and outer peripheries thereof, and through the air passages 17 from the support ring 10 side described later into the chamber portion 16. Compressed air is introduced. Further, a plurality of air passages 18 are formed penetrating from the inner bottom surface of the chamber portion 16 toward the flange portion 14 and parallel to the axis of the main body portion 9, and the open ends of the air passages 18 are the main shaft end surfaces 5. Is opened as an air injection port (air injection port) 18a.

  The support ring 10 is extrapolated to the main body 9 so as to be relatively rotatable, and a position in the axial direction is restricted by a pair of retainers 19. A joint member 20 is connected to a part of the support ring 10. The joint member 20 is formed with an air passage 21 having one end opened on the inner peripheral surface of the support ring 10 and communicating with the air passage 17 on the main body 9 side. The air passage 21 is attached to the joint member 20. The joint tube 22 changes its direction by 90 °, and the open end of the joint tube 22 opens to the outside as an air inlet (air inlet) 22 a at the other end of the air passage 21. The open end of the air passage 21 on the main body 9 side functions as an air supply port (air supply port) 21 a for the main body 9.

  On the other hand, another joint member 23 is attached to the spindle head 1 side supporting the spindle 3. The joint member 23 on the main shaft head 1 side is a housing 24 in which an air introduction passage 25 is formed and a spool 26 in which an air passage 27 is also formed so as to be retractable. The spool 26 is built in the housing 24. The compression coil spring 28 is biased in a direction protruding from the housing 24. The air introduction passage 25 is connected to an external compressed air supply source 29. Then, as shown in FIG. 3 in which the main part of FIG. 2 is further enlarged, when the main body 9 of the cleaning device 8 is attached to the main shaft 3 and is taper-coupled, it is attached to the joint member 20 on the main body 9 side. By pressing the joint tube 22 on the spool 26 of the joint member 23 on the spindle head 1 side, the air passage 21 on the joint member 20 side and the air passage 27 of the spool 26 on the joint member 23 side communicate with each other. Yes. Thereby, the air passage 27 of the spool 26 in the joint member 23 functions as an air supply port for the support ring 10 of the cleaning device 8.

  More specifically, as shown in FIG. 1, in the free state of the joint member 23 on the spindle head 1 side, the spool 26 biased by the compression coil spring 28 protrudes from the housing 24. The communication between the air introduction passage 25 and the air passage 27 on the spool 26 side is blocked.

  On the other hand, as shown in FIGS. 2 and 3, when the joint tube 22 is pressed against the spool 26, the joint tube 22 and the air passages 21, 27 on the spool 26 side communicate with each other, and the spool 26 itself is in the housing 24. As a result, the air passage 27 on the spool 26 side and the air introduction passage 25 on the housing 24 side communicate with each other. This makes it possible to supply compressed air from the spindle head 1 side to the cleaning device 8 side.

  Thus, the joint member 23 in which the spool 26 urged by the compression coil spring 28 is incorporated in the housing 24 also has a function as an on-off valve using the spool 26 as a valve body.

  Therefore, according to the cleaning device 8 configured in this way, when it is necessary to clean the spindle end surface 5 on which the specific tool holder holding the cutting tool is to be seated, the tool by the ATC mechanism is used. It is assumed that cleaning is performed by attaching the cleaning device 8 to the main shaft 3 using the change function. The cleaning of the spindle end surface 5 here is a method in which fine chips that may adhere to the spindle end surface 5 are blown off by an air blow method, for example.

  In order to attach the cleaning device 8 to the main shaft 3, as shown in FIG. 1, the cleaning device 8 supported by the arm of an ATC mechanism (not shown) with the circumferential groove 15 of the flange portion 14 as a gripping portion is connected to the main shaft 3. 2 and 3, the taper shank portion 12 of the main body portion 9 is inserted into the tapered hole 4 on the main shaft 3 side using the degree of freedom of the arm of the ATC mechanism, as shown in FIGS.

  In this case, if the phase alignment between the joint member 23 on the main shaft head 3 side and the joint member 20 on the cleaning device 8 side is performed in advance, the tapered shank on the main body 9 side is inserted into the tapered hole 4 on the main shaft 3 side. When the portion 12 is inserted, the main body 9 is pulled to the main shaft 3 side through the collet 7 and the pull stud 13 by the draw bar 6 on the main shaft 3 side, so that the taper hole 4 on the main shaft 3 side and the taper of the main body portion 9 are obtained. The shank portion 12 is taper-coupled. However, the flange surface 14a of the flange portion 14 on the main body 9 side is set in advance so as to ensure a predetermined gap G between the two as shown in FIG. An air injection port 18 a on the flange surface 14 side faces the spindle end surface 5.

  At the same time, when the main body 9 is pulled to the main shaft 3 side, the joint tube 22 attached to the joint member 20 on the cleaning device 8 side is pressed against the spool 26 of the joint member 23 on the main shaft head 1 side. Accordingly, the spool 26 is pushed into the housing 24. Accordingly, as described above, both the joint members 20 and 23 are connected to each other, and the opening / closing valve function of the joint member 23 on the spindle head 1 side is “open”. The part 16 is connected to the compressed air supply source 29 via the support ring 10 on the cleaning device 8 side, the joint member 20, and the joint member 23 on the spindle head 1 side.

  Therefore, the compressed air supplied from the compressed air supply source 29 is introduced into the chamber portion 16 of the main body portion 9, and the compressed air introduced into the chamber portion 16 has a plurality of inner bottom surfaces formed in the chamber portion 16. Jetted from the air injection port 18a toward the spindle end surface 5. As a result, air blow from the air injection port 18a at a close distance is performed on the spindle end face 5, and fine chips and the like adhering to the spindle end face 5 are removed so as to be blown away.

  4 is an enlarged view of a main part of FIG. 1 including a joint portion between the joint members 20 and 23 of FIG. 3, and FIG. 5 is an enlarged view taken along line AA of FIG. As is apparent from FIGS. 4 and 5, the compressed air introduced into the chamber portion 16 of the main body portion 9 is directed from the plurality of air injection ports 18 a communicating with the chamber portion 16 toward the main shaft end surface 5. Is injected. Since the gap G is secured between the flange surface 14a where the air injection port 18a is formed and the spindle end surface 5, as described above, the compressed air injected from the plurality of air injection ports 18a. Will flow along the gap G, as indicated by the arrow in FIG. As a result, air blow is performed on the main shaft end surface 5 by the air injected from the air injection port 18a, and fine chips and the like adhering to the main shaft end surface 5 are removed so as to be blown away.

  Such cleaning by the so-called air blow method is executed for a few minutes each time, for example, by appropriately or periodically interrupting a series of tool change schedules for machine tools.

  Further, the procedure for removing the cleaning device 8 from the main shaft 3 is the reverse of the above-described procedure, and a spool in which the joint tube 22 attached to the cleaning device 8 side is a component of the joint member 23 on the main shaft head 1 side. If separated from 26, the joint member 23 that also serves as an on-off valve immediately closes.

  Here, the air blow to the main shaft end surface 5 by the air injection from the air injection port 18 a as described above may be performed in a state where the main shaft 3 is stationary together with the main body portion 9. It may be performed while rotating.

  In this case, the main body 9 attached to the main shaft 3 rotates together with the main shaft 3, and the support ring 10 externally attached to the main body 9 allows the main body 9 to rotate. And since the several air passage 17 is formed in the trunk | drum 11 of the main-body part 9 in the position corresponding to the air passage 21 by the side of the support ring 10, although it is intermittent, the air passage 21 by the side of the support ring 10 and Communication with the air passage 17 on the main body 9 side is ensured.

  Moreover, even if the communication between the air passage 21 on the support ring 10 side and the air passage 17 on the main body 9 side becomes intermittent as the main body 9 rotates, the main body 9 has a relatively large volume. Since the large chamber portion 16 is formed, the compressed air can be stably ejected from the air ejection port 18a toward the main shaft end surface 5 by the chamber portion 16 acting as an accumulator.

  In addition, a synergistic effect due to centrifugal force can be expected by performing air blow from the air injection port 18a toward the main shaft end surface 5 as described above while rotating the main shaft 3 together with the main body 9, and the cutting attached to the main shaft end surface 5 is achieved. The powder scattering / removal effect is further improved.

  As described above, according to the present embodiment, the cleaning device 8 attached to the spindle 3 supplies compressed air from the spindle head 1 side supporting the spindle 3 when the spindle end surface 5 is cleaned by a so-called air blow method. Therefore, even in existing equipment in which the main shaft 3 does not have an air supply function, it can be easily implemented by simple remodeling work.

DESCRIPTION OF SYMBOLS 1 ... Main shaft head 3 ... Main shaft 4 ... Tapered hole 5 ... Main shaft end surface 8 ... Cleaning device 9 ... Main-body part 10 ... Support ring (external insertion member)
12 ... Taper shank (taper)
DESCRIPTION OF SYMBOLS 14 ... Flange part 14a ... Flange surface 16 ... Chamber part 18a ... Air injection port (air injection port)
20 ... Joint member 21a ... Air supply port (Air supply port)
22a ... Air inlet (air inlet)
23 ... Joint member (open / close valve)
24 ... Housing 26 ... Spool 27 ... Air passage (Air supply port)

Claims (3)

A device for cleaning a spindle end surface that is detachably attached to the spindle on the spindle head side to which the tool holder is attached, and on which the tool holder is seated when the tool holder is attached,
A main body that can be attached to and detached from the main shaft, and an extrapolation member that can rotate relative to the main body,
The main body includes a tapered portion that can be taper-coupled with the tapered hole of the main shaft, a flange portion that has a flange surface that faces the end surface of the main shaft when the taper hole and the tapered portion are taper-coupled, and an opening is formed in the flange surface. The air injection port for blowing compressed air toward the main shaft end surface,
The extrapolation member allows the air injection port of the air injection port to be relatively rotated with the air introduction port connected to the air supply port on the spindle head side when the taper hole and the taper portion are coupled to each other. An apparatus for cleaning a spindle end surface of a machine tool, comprising: an air supply port for supplying compressed air to an upstream side. A chamber portion is formed in the main body portion,
While compressed air is introduced from the air supply port on the extrapolation member side to the chamber portion,
2. The spindle end surface cleaning device for a machine tool according to claim 1, wherein the chamber portion and the air injection port communicate with each other. The spindle head is provided with an opening / closing valve for opening / closing the air supply port,
Based on the taper coupling between the tapered hole and the tapered portion, the opening / closing valve opens before or after the supply port on the spindle head side and the air introduction port on the external insertion member side are connected. The main shaft end surface cleaning device for a machine tool according to claim 2, wherein the main shaft end surface cleaning device is configured as described above.

Images