JPH0526239U - Tool holder - Google Patents

Abstract

(57) [Summary] [Purpose] To firmly support the holder body or support frame that is attached to the fixed part of the machine tool with the tool holder that is attached to the spindle. [Structure] A cylinder portion 5 integrally provided in parallel with the holder main body 3 or the support frame body 12 on one side in the radial direction of the holder main body 3 or the support frame body 12, and fitted to the cylinder portion 5 to the rear side. A clamp shaft 9 is provided which is projecting and has a tapered fitting shaft portion 8 which is engageable and disengageable with a tapered fitting recessed portion 7 provided in the fixing portion 6 of the machine tool at the projecting end portion. The shaft 9 is provided in the cylinder portion 5 so that the amount of protrusion thereof can be adjusted, and is fixed to the cylinder portion 5 in a stationary state by the fixing means 10 at the adjustment position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tool holder attached to a spindle of an NC machine tool by an automatic tool changer, and particularly, the present invention is applied to a holder or spindle for holding a non-rotating cutting tool such as a rib shaper (for grooving). It is used in the field of so-called angle heads, which are tool holders for cutting with a tilted angle.

[0002]

[Prior Art]

 Conventionally, a holder body for holding a non-rotating cutting tool such as a rib shaper and a so-called angle cutting holder (angle head), which has a flange for holding a manipulator and is mounted on a spindle of a work machine, and a tip of the holder body. Chuck for fixing the cutting tool provided coaxially with the holder main body on the side, a cylinder portion integrally provided in parallel with the holder main body on one radial side of the holder main body, and fitted to the cylinder portion. And a clamp shaft having a tapered fitting shaft portion that is engageable with and disengageable from a tapered fitting concave portion provided in the fixing portion of the machine tool at the projecting end portion. Exists.

Various cutting tools are attached to the tool holder in a magazine, and the tool holder is held by the manipulator of the automatic tool changer via the manipulator holding flange in accordance with a command signal. Then, it is taken out from the magazine and mounted on the spindle of the machine tool.In order to mount the tool holder on the spindle so that it does not shake, the holder body has a clamp shaft protruding parallel to it. When mounting the tool holder, the clamp shaft is wedge-shaped engaged with the fixed part of the machine body of the machine tool, etc., and the tool is created by the synergistic action of the clamp shaft engaged with this fixed part and the holder body fitted with the spindle. It is designed to prevent the holder from shaking.

By the way, in the conventional clamp shaft, when the clamp shaft is engaged with the fixed part of the machine tool in a wedge shape, in order to absorb the impact, the cylinder part is free to move in the axial direction and is buffered by a spring. Is supported by the public. For this reason, if a radial load is applied to the tool holder during cutting work, this force acts on the clamp shaft to displace the clamp shaft in the axial direction against the spring pressure, causing the tool holder to sway. Further, as described above, since the clamp shaft is fitted in the cylinder portion so as to be free to move, naturally there is a required clearance between the inner wall of the cylinder portion and the clamp shaft, which is the radial tool tool. It appears as rudder rattling, which causes a problem that the cutting accuracy is reduced due to subtle rattling of the cutting tool during cutting.

[0005]

[Problems to be solved by the device]

 In view of the above-mentioned difficulties, the present invention provides a tool holder of this kind that is designed to improve the machining accuracy by preventing the tool holder from rattling even if an external load is applied to the tool holder during cutting work. It is intended to be a suggestion.

[0006]

[Means for solving problems]

 According to claim 1 of the present invention, a holder main body 3 having a manipulator gripping flange 1 and mounted on a spindle 2 of a machine tool, and a holder main body 3 are shown with reference numerals of the embodiment. A chuck 4 for fixing a cutting tool, which is provided coaxially with the holder body 3 on the tip side of the holder body 3, a cylinder portion 5 integrally provided in parallel with the holder body 3 on one radial side portion of the holder body 3, The tapered fitting shaft portion 8 is fitted in the cylinder portion 5 and protrudes rearward, and is engageable with and disengageable from the tapered fitting concave portion 7 provided in the fixing portion 6 of the machine tool at the protruding end portion. And a clamp shaft 9 having a clamp shaft 9 having a protrusion amount that is adjustable in the cylinder portion 5 and fixed to the cylinder portion 5 by the fixing means 10 at the adjusting position. Adopt a configuration that is designed to It is intended to.

Further, according to a second aspect of the present invention, a holder body 3 having a manipulator gripping flange 1 and mounted on a spindle 2 of a machine tool, and a holder body 3 which is rotatable via a bearing 11 and axially A support frame 12 mounted immovably, a chuck 4 for fixing a cutting tool provided coaxially with the holder body 3 at the tip of the support frame 12, and one radial side of the support frame 12. A cylinder portion 5 that is integrally provided in parallel with the holder main body 3, and a taper shape that is fitted to the cylinder portion 5 and that projects rearward and that is provided on a fixed portion 6 of the machine tool at the projecting end portion. And a clamp shaft 9 having a tapered fitting shaft portion 8 that can be engaged with and disengaged from the fitting concave portion 7. The clamp shaft 9 is provided in the cylinder portion 5 so that the protrusion amount thereof can be adjusted, and At the adjustment position, fix the cylinder part 5 firmly. The configuration is such that it is fixed in a stationary state by the fixing means 10.

Further, in the third aspect, the clamp shaft 9 is provided with a detent member 13 that is movable in the axial direction independently of the clamp shaft 9, and the holder body 3 is detented. An engaged portion 14 that can be engaged and disengaged with respect to the engaging portion 13a of the member 13 is provided, and the engaging portion 13a is normally biased by the compression spring 17 to engage with the engaged portion 14. When the holder body 3 is mounted on the spindle 2, the engaging portion 13a is adapted to be disengaged from the engaged portion 14 against the urging force of the compression spring 17.

Further, according to a fourth aspect, the clamp shaft 9 is formed in a hollow cylinder shape, and the compression spring 17 is urged toward the rear end portion side of the hollow cylinder interior 15 to project the end of the clamp shaft 9. A protrusion pin 18 capable of further protruding from the portion is fitted, and the rotation stopping member 13 is radially protruded and screwed into the protrusion pin 18, and the rotation preventing member 13 is rotated by rotating the protrusion pin 18. The structure according to claim 2 or 3 which is mounted so that it can be moved and adjusted in any direction.

Further, according to a fifth aspect of the present invention, the anti-rotation member 13 is provided on the outer peripheral side of the clamp shaft 9 via a cylindrical shaft 42 provided integrally with the clamp shaft 9 and resists the urging force of the compression spring 17a. Is provided so as to be movable only in the axial direction, and the adjusting collar 43 is screwed into the outer peripheral threaded portion 42a of the cylindrical shaft 42. By rotating the adjusting collar 43, the anti-rotation member 13 can be moved and adjusted in the axial direction. The configuration according to claim 2 or 3 is adopted.

Further, in the present invention, the clamp shaft 9 is formed in a hollow cylindrical shape, and an adjusting bolt 16 for axially adjusting the clamp shaft 9 is provided on the tip end side of the hollow cylinder inside 15 of the cylinder. The configuration according to any one of claims 2 to 5, which is screwed from the portion 5, is adopted.

Further, according to the present invention, the screwing pressure of the adjusting bolt 16 which receives the fitting pressure of the clamp shaft 9 with respect to the tapered fitting recess 7 provided in the fixing portion of the machine tool is equal to or more than a constant pressure. In this case, the clutch means 45 is interposed between the screwing operation portion 44 of the adjusting bolt 16 and the adjusting bolt 16 so that the adjusting bolt 16 cannot be screwed further. is there.

Further, in the eighth aspect, the clamp shaft 9 is formed in a hollow cylinder shape, and the inside of the hollow cylinder 15 is fitted with the clamp shaft 9 in which an oil passage 46 reaching the cutting blade 21 is formed. The configuration according to any one of claims 2, 3, 5, 6 or 7 is adopted in which a cylindrical oil-tight packing 47 is attached to the shaft portion 8.

[0014]

[Action]

 According to the first aspect of the present invention, when the manipulator of the automatic tool changer grips the manipulator gripping flange 1 and the tool holder is mounted on the spindle 2 of the machine tool, the clamp shaft 9 has its taper fit. The mating shaft portion 8 is fitted in a tapered fitting concave portion 7 provided in the fixed portion 6 of the machine tool in a wedge shape, but the amount of protrusion of the clamp shaft 9 from the cylinder portion 5 is adjusted in advance. Since it is fixedly fixed to the cylinder portion 5 by the fixing means 10 at the position, when the shank portion 19 of the holder body 3 is attached to the attachment hole 20 of the spindle 2, at the same time, the clamp shaft 9 is tapered. The fitting shaft portion 8 is closely fitted like a wedge into a tapered fitting recessed portion 7 provided in the fixing portion 6 of the machine tool, and the tool holder is fitted to the spindle 2. The holder main body 3 and the fixing portion. It will be supported by good to synergy with clamp shaft 9 that is Kakarihama to.

According to the second aspect, in addition to the action of the first aspect, since the holder body 3 is rotatably provided on the support frame body 12 by the bearing 11, the spindle 2 on the machine tool side is positioned at the stop position. Even if it rotates a certain amount for (orientation), it can be installed without any problem.

Further, in the third aspect, when the tool holder is mounted on the spindle 2, the support frame 12 is locked by the clamp shaft 9 to the fixed portion 6 of the machine tool so as not to rotate. However, at this time, since the engaging portion 13a of the rotation preventing member 13 on the side of the support frame 12 is disengaged from the engaged portion 14 on the side of the holder body 3, the holder body 3 is not restrained by the support frame 12 at all. However, when the tool holder is removed from the spindle 2 by the manipulator, the engaging portion 13a of the detent member 13 on the support frame 12 side does not rotate. The holder main body 3 and the support frame body 12 are constrained in a non-rotating state by being urged by the compression spring 17 to engage with the engaged portion 14 on the third side, so that they are circumferentially restrained. They are stored in and removed from the magazine while maintaining a certain positional relationship.

In addition, according to the present invention, by fitting the clamp shaft 9 into the fitting recess 7 of the fixing portion 32, the protruding pin 18 comes into contact with the bottom of the fitting recess 7 and the protruding pin 18 Is retracted and screwed into this, the detent member 13 is disengaged from the engaged portion 14 against the urging force of the compression spring 17, and the protruding pin 18 is rotated to cause the tip end portion of the clamp shaft 9 to rotate. It is possible to adjust the distance from to the rotation stop member 13.

Further, according to a fifth aspect, by fitting the clamp shaft 9 into the fitting recess 7 of the fixing portion 32, the adjusting collar 43 comes into contact with the end surface of the fixing portion 32, and the adjusting collar 43 is fixed. The detent member 13 which is retracted and screwed into this through the cylindrical shaft 42 is disengaged from the engaged portion 14 against the biasing force of the compression spring 17a, and the adjusting collar 43 is rotated to clamp the detent member 13. The distance from the tip of the shaft 9 to the anti-rotation member 13 can be adjusted.

Further, according to claim 6, the amount of protrusion of the clamp shaft 9 from the cylinder portion 5 can be adjusted by rotating the adjusting bolt 16, and at the same time, as shown in claim 4 or 5, By adjusting the anti-rotation member 13 in the axial direction by the pin 18 or the adjustment collar 43, the compression amount of the compression spring 17 does not change, and a constant compression force can always be applied.

According to the present invention, the clamp shaft 9, to be exact, the fitting pressure, that is, the contact, of the clamp shaft 9 with respect to the tapered fitting recess 7 provided in the fixed portion of the machine tool. When the pressure reaches the proper pressure, this pressure naturally appears as the screwing pressure of the adjusting bolt 16. When the screwing pressure exceeds a certain pressure, that is, when the fitting pressure of the clamp shaft 9 into the fitting recessed portion 7 reaches an appropriate pressure, the clutch means 45 works even if the screwing operation portion 44 is operated, and the adjustment is performed. The bolt 16 will not rotate any further.

Further, according to the present invention, since the cylindrical oil-tight packing 47 is attached to the fitting shaft portion 8 of the clamp shaft 9, the tapered fitting shaft portion 8 of the clamp shaft 9 is provided. By wedge-fitting into the tapered fitting concave portion 7 of the fixed portion 32, a gap is generated between the bottom of the fitting concave portion 7 and the tip end surface of the fitting shaft portion 8 to prevent oil leakage. Since the cylindrical oil-tight packing 47 keeps the both parts oil-tight, the cause is that there is no risk of oil leakage.

[0022]

【Example】

 FIG. 1 shows an embodiment of the present invention and shows a state in which a tool holder is mounted on a spindle 2 of a machine tool.

A tapered shank portion 19 to be fitted in a tapered mounting hole 20 of the spindle 2 is formed on the rear end side of the holder body 3, and a manipulator is provided between the shank portion 19 and the holder body 3. The gripping flange 1 is integrally formed.

A support frame 12 is rotatably and axially immovably supported on the outer peripheral side of the holder body 3 via a bearing 11. The tip of the support frame 12 has a rib shaper (groove). A chuck 4 for fixing a cutting tool 21 for cutting or the like is provided on the same axis as the holder main body 3.

A cylinder portion 5 having an axis parallel to the axis of the holder body 3 is integrally formed on the lower side of the support frame 12, and the clamp shaft 9 is attached to the cylinder 5. The rear end is slidably fitted so as to project from the open end of the cylinder part 5. The clamp shaft 9 is formed in a hollow cylindrical shape, and an internal thread 22 is engraved on the inner wall of the hollow cylindrical portion 15 on the tip end side, and an adjusting bolt 16 is screwed into the internal thread 22. An end wall 23 is attached to the tip of the cylinder portion 5 with a screw 24, the outer peripheral step 16a of the adjusting bolt 16 engages with a hole 23a provided in the end wall 23, and the rear end of the bolt 16 has a hole. 23a is exposed to the outside, and a square hole 25 is provided in the end surface. The adjusting bolt 16 is also formed in a hollow shape, and the hollow portion 16b and the square hole 25 communicate with each other to form an air vent hole. As a result, the adjusting bolt 16 is supported between the clamp shaft 9 into which the screw is screwed and the end wall 23 with which the outer peripheral step portion 16a abuts, but is supported immovably in the axial direction.

A projecting pin 18 is slidably fitted inside the hollow cylinder interior 15 of the clamp shaft 9 and a bolt pin 26 is coaxially projected on the base side of the hollow shaft interior 15. The anti-rotation member 13 is screwed in so that the anti-rotation member 13 projects in the radial direction from one of the elongated holes 27 of the pair of elongated holes 27, 28 provided in the clamp shaft 9 in the axial direction. A set screw 29 is screwed into the end face of the rotation stopping member 13 from the other long hole 28, and the rotation preventing member 13 is fixed to the bolt pin 26 by screwing the set screw 29 into pressure contact with the bolt pin 26. It has become. The projecting end surface of the projecting pin 18 is also provided with a square hole 30.

A compression spring 17 is interposed between the anti-rotation member 13 and the adjusting bolt 16 to constantly urge the anti-rotation member 13 and the projecting pin 18 attached thereto in the projecting direction.

Further, the cylinder portion 5 is provided with a fixing screw 31 that is screwed from the side wall 5 a toward the outer peripheral wall of the clamp shaft 9, and by screwing the fixing screw 31, the clamp shaft 9 is immovable on the cylinder portion 5. It is designed to be fixed in a state.

The tip of the clamp shaft 9 is formed into a tapered fitting shaft portion 8, and a fixing block 32 is attached to the corresponding fixing portion 6 on the working machine side, and a tapered fitting portion is also attached to this. A mating recess 7 is formed.

On the other hand, on the outer peripheral side of the holder main body 3, a ring-shaped brim member 33 is fixed to the holder main body 3 by screws 34, and a notch-shaped engaged portion 14 is formed on the holder main body 3. The engaging portion 13a of the anti-rotation member 13 can be engaged.

In this embodiment, the holder frame 3 is rotatably provided with the support frame 12 via the bearing 11, and the cylinder portion 5 into which the clamp shaft 9 is fitted is integrally formed with the support frame body 12. The supporting frame 12 may be removed, the chuck 4 for fixing the cutting tool may be directly attached to the tip of the holder body 3, and the cylinder portion 5 may be integrally formed in the radial direction of the holder body 3. .. In this case, the detent member 13 is not necessary.

Further, in the above-described embodiment, as the means 10 for fixing the clamp shaft 9 to the cylinder portion 5 in an immovable state, the fixing screw 3 1 for pressing the outer peripheral wall of the clamp shaft 9 is screwed into the side wall 5 a of the cylinder portion 5. However, in place of the fixing screw 31, the exposed portion of the adjustment bolt 16 from the end wall 23 is further extended to form a bolt portion on which the lock nut is screwed to maintain the adjustment bolt 16 in a stationary state. The clamp shaft 9 may be fixed in an immovable state by means of the adjusting bolt 16.

Further, as shown in FIG. 4, the inclined frame portion 12a is integrally formed by inclining the front end portion side of the support frame body 12 at a required angle with respect to the axis thereof, for example, 15 ° to 90 °, and is not integrally formed with this. The rotary cutting tool attachment chuck 4 may be attached to form a rib shear tool holder capable of cutting from an oblique direction.

Further, as shown in FIG. 5, a bevel gear 34 is integrally provided on the tip side of the holder body 3, and a rotating shaft 36 is integrally provided on the other bevel gear 35 meshing with the bevel gear 34. It may be configured as a so-called angle head tool holder in which the cutting tool mounting chuck 4 is mounted.

Further, as shown in FIG. 6, the tapered fitting shaft portion 8 at the tip of the clamp shaft 9 and the tapered fitting recessed portion 7 of the machine tool side fixing portion 6 into which the clamp shaft 9 is fitted have the respective tapered walls 3 respectively. The straight wall 38 may be formed subsequent to step 7. The inclination angle of the taper wall 37 is preferably 10 ° to 30 °, and the straight wall 38 is provided so as to have a sealing action at this portion, which can be used as a so-called fitting recess 7 for an oil hole. it can.

FIG. 7 shows another embodiment of the present invention, in which the clamp shaft 9 fitted in the cylinder portion 5 and the adjusting bolt 16 screwed into the clamp shaft 9 are formed in a hollow shape so as to communicate with each other. The hollow cylinder interior 15 has oil passages 46 and 46a formed through the through hole 48 formed in the adjusting bolt 16 and the cylinder portion 5 and through the through hole 49 to the cutting tool 21. A cylinder shaft 42 is fitted on the outer peripheral side of the clamp shaft 9 so as to be movable in the axial direction, and an anti-rotation member 13 is integrally formed and protrudes from the cylinder shaft 42 in the radial direction. A threaded portion 42a is provided on the outer peripheral surface of the cylindrical shaft 42, and an adjusting collar 43 is further screwed into the threaded portion 42a. The tip end of the adjusting collar 43 contacts the fixed portion 6, more precisely, the end surface of the fixed block 32. It is like this. Further, a cylindrical oil-tight packing 47 is attached to the inner peripheral surface of the fitting shaft portion 8 of the clamp shaft 9, the tip portion 47a of the packing 47 is formed in a lip shape, and the lip-shaped tip portion 47a is fixed. It is designed to come into contact with the bottom of the fitting recess 7 formed in the block 32. An oil-tight ring 48 is attached to the bottom of the fitting recess 7 so as to abut against the lip-shaped tip 47a. In addition, 49 and 50 are set screws for fixing the adjusting collar 43 and the adjusting bolt 16 at the adjusting positions, respectively. Reference numeral 51 is a pressing pin provided between the compression spring 17 and the anti-rotation member 13, and 52 is a guide for the anti-rotation member 13. Reference numeral 53 is a retaining ring for the oil-tight packing 47.

8 and 9 show another embodiment of the main part of the present invention. In the above-mentioned embodiment, the square hole 25 for screwing the adjusting bolt is provided directly on the end face of the adjusting bolt 16. However, in this embodiment, a cylindrical rotary operating portion 44 is attached to the outer peripheral side of the rear end portion of the adjusting bolt 16 and a square hole 25 for screwing the adjusting bolt is provided on the end surface of the operating portion 44. As shown in FIG. 9, a clutch hole 45a is provided between the operation portion 44 and the adjusting bolt 16 on the outer peripheral surface of the bolt at appropriate intervals, a clutch ball 45b engaging with the clutch hole 45a, and a clutch ball 45b are pressed. The clutch means 45 composed of the clutch spring 45c is installed, and when the screwing pressure of the adjusting bolt 16 exceeds a certain level, the clutch means 45 is actuated, that is, the clutch ball 45b moves the clutch spring 45c. The clutch bolt 45 escapes from the clutch hole 45a against the urging force of the control hole to block the transmission force between the adjusting bolt 16 and the rotation operating portion 44, and even if the rotation operating portion 44 is rotated by the square hole 25, the adjustment bolt 16 does not move. It will not be screwed in further.

In use, however, a tool holder to which various cutting tools 21 are preliminarily attached is taken out from the magazine by the manipulator of the automatic tool changer and transferred to the spindle 2 side of the machine tool. However, during this transfer, the anti-rotation member 13 on the support frame 12 side is biased by the compression spring 17 so that its engaging portion 13a engages with the engaged portion 14 on the holder main body 3 side and is restrained from each other. Therefore, the support frame 12 does not sway during the transfer. In this state, the protruding pin 18 further protrudes from the tip end portion of the clamp shaft 9 (shown by a chain line in FIG. 1).

When the shank portion 19 of the holder body 3 is fitted into the mounting hole 20 of the spindle 2, the fitting shaft portion 8 of the clamp shaft 9 is simultaneously fitted into the fitting recess portion 7 of the machine tool side fixing portion 6. Then, the tip of the protruding pin 18 abuts the bottom of the fitting recess 7 and retracts against the urging force of the compression spring 17, and the engaging portion 13a of the detent member 13 integral therewith is held by the holder. The support frame 12 is supported by the holder body 3 and the clamp shaft 9 in a non-rotating state and an immovable state by being guided by the guide groove 39 and separated from the engaged portion 14 on the main body 3 side. The holder body 3 can rotate together with the spindle 2.

A non-rotating cutting tool 21 such as a rib shear (grooving) is attached to the chuck 4 at the tip of the support frame 12, and the tool holder for the rib shear shown in FIG. Grooving and the like can be performed, and further, in the angle head tool holder shown in FIG. 5, the rotary cutting tool 21 can be used to incline to a desired angle and perform drilling and the like.

As is clear from the above description, when the shank portion 19 of the holder body 3 is fitted in the mounting hole 20 of the spindle 2, the fitting shaft portion 8 of the clamp shaft 9 is fitted to the fixing portion 6. It must fit into the recess 7, and for this adjustment, the adjustment bolt 16 is rotated by a screwdriver using the square hole 25 of the adjustment bolt 16 to move and adjust the clamp shaft 9 in the axial direction. Also, by using the square hole 30 of the projecting pin 18, the projecting pin 18 is also rotated by the driver to adjust the rotation preventing member 13 in the axial direction by being guided by the bolt pin 26 by the same amount as the moving amount of the clamp shaft 9. Thus, the compression amount of the compression spring 17 can be adjusted so as not to change.

As described above, in this embodiment, the amount of protrusion of the clamp shaft 9 is accurately and easily externally within the range of the maximum amount of protrusion of the clamp shaft 9 of FIG. 1 to the minimum amount of protrusion shown in FIG. It can be adjusted to.

Then, by fixing the clamp shaft 9 to the cylinder portion 5 in an immovable state by the fixing screw 31 at the adjusted position, the clamp shaft 9 becomes integral with the support frame 12 to prevent external load during cutting work. Even if the clamp shaft 9 is received, the clamp shaft 9 does not shake or rattle, and accurate cutting work can be performed.

In the rib shear cutting work with the non-rotating cutting tool and the angle cutting work with the rotating cutting tool, a vector force, which is a load in the radial direction or a resultant force in the radial direction and the axial direction, exerts a large force on the clamp shaft 9. However, in the present invention, the fitting shaft portion 8 of the clamp shaft 9 is securely engaged with the fitting concave portion 7 of the fixing portion 6 by the wedge effect, and the clamp shaft 9 is fixed by the fixing means 10 to the holder body 3 or the support frame body. Since it is integrally fixed to 12, the cutting tool 21 can perform accurate cutting work without eccentricity or rattling against the above large external load.

Further, as shown in FIG. 1, the support frame 12 is held in the non-rotating state by the fixed portion 6 of the machine tool, and the non-rotating cutting tool 21 is attached thereto, but the holder main body 3 Is rotatably provided for the following reason.

That is, a positioning projection 40 is provided on the tip surface of the spindle 2 on the machine tool side, and correspondingly, a positioning recess 41 for engaging the projection 40 with the manipulator gripping flange 1 is provided. When the holder body 3 is mounted on the spindle 2, the recess 41 engages with the projection 40 to position the support frame 12. On the other hand, in the case of using the rotary cutting tool 21 shown in FIG. 5, for example, the stop position of the holder body 3 which rotates integrally with the rotary cutting tool 21 does not always stop at a fixed position in the circumferential direction. For this reason, at the end of the cutting operation, the spindle 2 is rotated several times so that the positioning projection 40 of the spindle 2 is always at a fixed position, for example, the vertical position, and is stopped at this position. Naturally, the positioning recess 41 of the holder body 3 is also engaged with the support frame 12 and is housed in the magazine while being positioned at a fixed upper and lower position.

As described above, in the general automatic control machine tool, the spindle 2 is always automatically rotated several times for positioning (this is called orientation) at the end of its cutting work. The holder body 3 connected to the spindle 2 of the present invention can rotate even when it does not need to rotate like a non-rotating cutting tool. Therefore, the present invention can be sufficiently used for general automatic control machine tools.

Further, it is needless to say that the embodiment shown in FIG. 7 can exhibit the same effects as those of the embodiment shown in FIG. 1, and particularly in this embodiment, it is used as a tool holder with an oil hole. Further, the axial position of the detent member 13 can be adjusted by rotating the adjusting collar 43 with the tool holder mounted on the machine tool, so that the accurate adjustment can be achieved. Moreover, even if the fitting shaft portion 8 of the clamp shaft 9 is wedge-fitted into the fitting recessed portion 7 of the fixed portion 32 and a gap is formed between the tip end portion of the fitting shaft portion 8 and the bottom portion of the fitting recessed portion 7, oil is not generated. Since the tight packing 47 keeps the both parts oil-tight, there is no risk of oil leakage.

Furthermore, as shown in FIGS. 8 and 9, the amount of protrusion of the clamp shaft 9 adjusted by the adjusting bolt 16 is achieved by interposing the clutch means 45 between the adjusting bolt 16 and the rotary operation portion 44. Can be regulated accurately, and the amount of adjustment does not vary depending on the operator.

[0050]

[Effect of the device]

 According to claim 1 of the present invention, since the clamp shaft for fixing the holder main body to the fixed portion of the machine tool can freely adjust the protrusion amount, the shank portion of the holder main body is At the same time, when it is mounted in the spindle mounting hole, the tapered fitting shaft of the clamp shaft is wedge-shaped in close contact with the tapered fitting recess provided on the machine tool to secure the holder body. The clamp shaft can be firmly fixed to the part, and the clamp shaft is integrally fixed to the holder body at the adjusting position by the fixing means. Therefore, even if the clamp shaft receives a large external load during cutting work, Since it does not sway or rattle in the axial or radial direction, it enables accurate cutting work.

According to claim 2, in addition to the effect of claim 1, since the holder main body is rotatably provided on the support frame by the bearing, the spindle on the machine tool side positions (orients) the stop position. Therefore, it can be installed without any problems even when it rotates a certain amount, and it can be sufficiently used for general automatic control machine tools and has excellent versatility.

In the third aspect, when the holder main body is removed from the spindle, the holder main body and the support frame are engaged with each other by the engaging portion of the anti-rotation member and the engaged portion on the support frame side. As a result, the holder body and the support frame are held integrally while maintaining a fixed positional relationship, and the support frame does not sway during the transfer of both, so it can be safely stored in the magazine. It can be removed from the magazine and even mounted on the spindle in a fixed orientation.

Further, according to the fourth aspect, by rotating the protrusion pin, the protrusion amount of the rotation preventing member can be freely adjusted according to the specifications of the machine tool to be used, and the versatility is accordingly high. I'm out. Moreover, the adjustment work is easy because the protrusion pin may be rotated from the outside.

Further, according to the present invention, the turning member can be moved in the axial direction by rotating the adjusting color while the tool holder is attached to the machine tool. Can be adjusted.

According to the sixth aspect, the amount of protrusion of the clamp shaft can be freely adjusted in accordance with the specifications of the machine tool to be used with the tool holder attached to the machine tool, which is versatile. Rich in. Moreover, the adjustment work is easy because the adjustment bolt can be rotated from the outside.

According to the present invention, the fitting pressure of the clamp shaft with respect to the tapered fitting recess 7 provided in the fixed part of the machine tool, that is, the contact pressure, can always be adjusted to an appropriate pressure. Therefore, there is no backlash due to insufficient contact pressure, distortion of the clamp shaft and the cylinder part that holds it stationary due to excessive contact pressure, or damage to the tool holder. It can be mounted accurately and concentrically.

Further, according to the present invention, since the cylindrical oil-tight packing is attached to the fitting shaft portion of the clamp shaft, the tapered fitting shaft portion of the clamp shaft has the tapered shape of the fixing portion. Even if a gap is generated between the tip end surface of the fitting shaft portion and the bottom portion of the fitting concave portion when the wedge fitting is performed in the fitting concave portion, the oil-tight packing absorbs an error between the two. It can be used stably for a long period of time without causing oil leakage.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a front view of the tool holder as viewed from the chuck side.

FIG. 3 is a side view for explaining the operation of the main part of the present invention.

FIG. 4 is a vertical sectional side view showing another embodiment of the present invention.

FIG. 5 is a vertical sectional side view showing still another embodiment of the present invention.

FIG. 6 is a vertical sectional view showing another embodiment of the main part of the present invention.

FIG. 7 is a vertical sectional side view showing another embodiment of the present invention.

FIG. 8 is a vertical sectional side view showing a main part of another embodiment of the present invention.

9 is a sectional view taken along line AA in FIG.

[Explanation of symbols]

 1 Manipulator gripping flange 2 Machine tool spindle 3 Holder body 4 Chuck 5 Cylinder part 5a Cylinder part side wall 6 Fixing part 7 Tapered fitting concave part 8 Tapered fitting shaft part 9 Clamp shaft 10 Fixing means 11 Bearing 12 Support frame 12a Inclined frame 13 Detent member 13a Engagement part 14 Engaged part 15 Hollow cylinder inside 16 Adjustment bolt 17 Compression spring 17a Compression spring 18 Projection pin 19 Shank part 20 Mounting hole 21 Cutting tool 42 Cylindrical shaft 43 Adjustment Collar 44 Adjusting bolt screw-in operation unit 45 Clutch means 46 Oil passage 47 Cylindrical packing

Claims (8)

[Scope of utility model registration request] 1. A holder main body which has a manipulator gripping flange and is mounted on a spindle of a machine tool, a chuck for fixing a cutting tool which is provided coaxially with the holder main body at a tip side of the holder main body, and a holder main body A cylinder portion integrally provided in parallel with the holder main body on one side in the radial direction, and a taper shape fitted to the cylinder portion and protruding rearward and provided at a fixed end of the machine tool at the protruding end portion. A clamp shaft having a tapered fitting shaft portion that can be engaged with and disengaged from the fitting concave portion, the clamp shaft being provided in the cylinder portion so that the amount of protrusion thereof can be adjusted, and at the adjustment position A tool holder adapted to be fixed in a stationary state by a fixing means. 2. A holder main body having a manipulator gripping flange and attached to a spindle of a machine tool, a support frame body rotatably and axially immovably attached to the holder main body, and a support frame. A chuck for fixing the cutting tool, which is provided coaxially with the holder main body at the tip of the body, a cylinder portion integrally provided in parallel with the holder main body on one side in the radial direction of the support frame, and the cylinder portion And a clamp shaft that is fitted and protrudes rearward, and that has a tapered fitting shaft portion that is engageable and disengageable with a tapered fitting recess provided in a fixed portion of a machine tool at the protruding end, A tool holder, wherein the clamp shaft is provided in the cylinder portion so that the amount of protrusion thereof can be adjusted, and is fixed to the cylinder portion in a stationary state by fixing means at the adjustment position. 3. The clamp shaft is provided with a detent member that is movable in the axial direction independently of the clamp shaft, and the holder body is detachable from an engaging portion of the detent member. An engaging portion is provided, and the engaging portion is normally biased by the compression spring to engage the engaged portion, and when the holder body is mounted on the spindle, the engaging portion biases the compression spring. The tool holder according to claim 2, which is adapted to be disengaged from the engaged portion against the force. 4. The clamp shaft is formed in a hollow cylindrical shape,
A projecting pin that is biased by the compression spring and further projectable from the projecting end of the clamp shaft is fitted to the rear end side inside the hollow cylinder, and the whirl-stop member projects radially in the projecting pin. The tool holder according to claim 2 or 3, wherein the whirl-stop member is attached so as to be movable in the axial direction by screwing in and rotating the protruding pin. 5. The anti-rotation member is provided on the outer peripheral side of the clamp shaft so as to be movable only in the axial direction through a cylindrical shaft integrally provided with the member and against the biasing force of the compression spring. The tool holder according to claim 2 or 3, wherein an adjusting collar is screwed into an outer peripheral thread portion of the cylindrical shaft, and the turning stop member is attached so as to be movable and adjustable in an axial direction by rotating the adjusting collar. 6. The clamp shaft is formed in a hollow cylindrical shape,
The tool holder according to any one of claims 2 to 5, wherein an adjusting bolt for axially adjusting the clamp shaft is screwed from the cylinder portion to the tip end side inside the hollow cylinder. 7. The adjusting bolt cannot be screwed further when the screwing pressure of the adjusting bolt, which receives the fitting pressure of the clamp shaft with respect to the tapered fitting recess provided in the fixed portion of the machine tool, becomes a certain pressure or more. 7. The tool holder according to claim 6, wherein clutch means is interposed between the screwing operation portion of the adjusting bolt and the adjusting bolt. 8. The clamp shaft is formed in a hollow cylindrical shape,
8. A hollow oil-tight packing is attached to a fitting shaft portion of the clamp shaft, wherein an oil passage extending to a cutting blade is formed inside the hollow cylinder. Tool holder described in the crab.