JPH0541656U - Brooch holder with oil hole - Google Patents

Abstract

(57) [Abstract] [Purpose] During broaching, the cutting oil is evenly supplied to the cutting surface to eliminate clogging of chips and improve the cutting surface, and to prevent damage to the broach cutter. Improve life. An oil communicating with an oil passage 6 bored in a main body 3 having a taper shank portion 2 mounted in a taper hole of a spindle of a machining center and a broach holder portion 12 provided with a broach groove 13. The oil guide groove block 16 provided with the passage 25 is attached. Furthermore, the oil passage provided in the main body is branched into a plurality of oil passages 8 which are opened at the end surface of the broach holder portion 12 with the broach groove interposed therebetween. The spherical body 9 is rotatably fitted into each opening 10. The oil guide groove block 16 has a hole 23 in the axial direction and a hole 19 in the direction orthogonal to the axis intersecting with the hole 23.
The refueling pin 22 having a hole formed therein is slidably accommodated while being urged toward the end surface of the machining center spindle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a broach holder with an oil hole used when finishing a groove width by a broaching process using a machining center.

[0002]

[Prior Art]

 When the groove width is broached by a machining center, it is common to supply a cutting fluid from a coolant nozzle provided at the end of the spindle cover of the machining center to the cutting section, in other words, remove it.

[0003]

[Problems to be solved by the device]

 However, as described above, since the cutting fluid is a slip off from the coolant nozzle provided on the end surface of the spindle cover of the machining center, it was very difficult to uniformly supply the cutting fluid to the cutting portion. As a result, there is a risk that the surface to be cut of the part that is not covered with the cutting fluid will be deteriorated and that the cutting debris will not be washed away by the cutting fluid, resulting in chip clogging and damage to the broach.

[0004]

[Means for Solving the Problems]

 The present invention has a main body 3 having a tapered shank portion 2 mounted in a tapered hole of a spindle of a machining center and a broach holder portion 12 having a broach groove 13, and an oil passage communicating with an oil passage 6 bored inside the main body. The oil passage 6 has a passage 25 and is constituted by an oil guide block 16 attached to the main body 3, and the oil passage 6 formed in the main body has a plurality of oil passages which are opened to the end surface of the broach holder portion 12 through the broach grooves 13. 7 and 8, the spherical body 9 is rotatably fitted in each of the openings 10, and the oil guide block 16 is provided with an axial hole 23 and an axially orthogonal hole 19 intersecting the axial hole 23. A broach holder with an oil hole in which the provided oil supply pin 22 is slidably accommodated in a state of being urged toward the end surface of the machining center. Cutting oil Supplying, in which the foregoing problems are eliminated.

[0005]

[Action]

 Before starting the broaching, it is fitted into the opening end of the branch oil passage 8 so that the cutting fluid can reach the cutting point even if the work piece or jigs are in the way. The spherical body 9 is rotated to adjust the position of the opening 10. The cutting fluid discharged from the oil supply block provided on the end face of the machining center spins first through the hole 23 in the axial direction of the oil supply pin 22 and the hole 19 in the direction perpendicular to the axis, and then from the hole 25 of the oil guide block 16 to the broach holder part. From the oil passage 6 at 12, further through the oil passage 7 to the plurality of branched oil passages 8 and discharged from the opening 10 of the spherical body 9.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. At one end of the main body 3, a taper shank portion 2 which is fitted in a taper hole formed in a spindle of a machining center (not shown) is provided. On the large diameter side of the tapered shank portion, there is provided a flange portion provided with a V groove 5 for automatic replacement of the broach holder and a key groove 4 with which an end surface key formed on the end surface of the machining center spindle engages.

At the other end of the body 3, a broach holder 12 extending in a T-shape orthogonal to the axis of the tapered shank portion 2 is integrally provided, and a broach groove 13 is formed along the broach holder 12. It is set up. A broach cutter B is attached to the broach groove 13, and the broach cutter is fixed to the broach holder 12 by several setscrews 15 screwed obliquely to the broach cutter. The rear end of the broach cutter B is supported by the stopper pin 14 so as to receive the cutting load during broaching. On the small diameter side of the taper shank portion 2, a pull stud 1 which plays a role of fixing the main body 3 to the machining center spindle is screwed and fixed.

An oil guide block 16 is fixed by several bolts 27 to the side surface of the broach holder portion 12 opposite to the shank portion of the main body 3. Further, a chamber 28 is formed in the oil guide block 16, and an oil supply pin 22 biased by a coil spring 18 is slidably inserted into the chamber toward a spindle end surface of a machining center (not shown). Further, the small diameter portion 29 of the oil supply pin 22 penetrates the bottom of the chamber 28 and projects to the outside of the oil guiding block 16, and by turning the nut 17 screwed into the male screw formed on the outer periphery of the small diameter portion, Determine the amount of movement of the refueling pin.

A taper portion 24 is formed on an end portion side of the oil supply pin 22 protruding from the oil guide block 16, and the taper portion is fitted with a taper groove of the oil supply block provided on an end surface of a machining center spindle (not shown). To do. When the broach holder 12 is attached to the machining center spindle at the orientation position of the machining center, the oil supply block is arranged so that the moving direction of the table of the machining center and the cutting direction of the broach cutter B attached to the broach holder coincide with each other. At that time, the relational position between the oil supply block and the oil supply pin 22 is pressed by the coil spring 18. The oil supply pin 22 is pushed up by a predetermined amount so that the taper groove of the oil supply block and the taper portion 24 of the oil supply pin 22 are tapered. Make sure.

The oil supply pin 22 is provided with an axial hole 23 and a hole 19 perpendicular to the axis following the hole 23, and further includes an opening of the hole 19 perpendicular to the axis, and an oil sump circumferential surface including an opening of the hole 19. A groove 20 is formed. Further, the hole 19 in the direction perpendicular to the axis communicates with the hole 25 formed in the oil guide block 16 via the oil reservoir circumferential groove 20. The hole 25 formed in the oil guide block 16 communicates with the oil passage 6 formed in the broach holder portion 12 provided in the main body 3, and the oil passage 6 extends along the broach cutter B. A branched oil passage 8 is formed which branches into the extending oil passages 7 and 7 and reaches a plurality of openings 10 2 on both sides of the end face of the broach holder portion 12. The opening 10 is formed in a spherical body 9 that is rotatably fitted in the end of the branch oil passage 8, and if the position of the opening is freely adjusted by rotating the spherical body, the cutting oil is removed. It can be fed to the desired position of the broach blade.

[0011]

As described above, the present invention communicates with a main body having a shank portion mounted in a tapered hole of a spindle of a machining center and a broach holder portion provided with a broach groove, and an oil passage bored in the main body. A broach holder with an oil hole, which comprises an oil guide block attached to the main body, wherein a plurality of oil passages formed in the main body are opened on both sides of the broach groove. , A spherical discharge member is rotatably fitted in each opening, and an oil supply pin with an axial hole in the oil supply block is urged toward the end face of the machining center spindle. It is slidably accommodated in the state, and the outer end of the oil supply pin is provided with a taper part that matches the taper groove of the oil supply block, and an oil sump that also communicates with the oil passage formed in the oil guide block on the outer peripheral surface. Because, Since it is possible to reliably supply the cutting fluid to the cutting edge of the broach cutter, it is possible to bring out the full effect of the cutting fluid during broaching, which not only improves the cutting surface but also prevents damage to the broach cutter. Life has been significantly improved.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

[Explanation of symbols]

 2. ． ． ． ． ． ． Taper shank 3. ． ． ． ． ． ． Main body 6. ． ． ． ． ． ． Oil passage 8. ． ． ． ． ． ． Oil passage 10. ． ． ． ． ． ． Opening 12. ． ． ． ． ． ． Broach holder 13. ． ． ． ． ． ． Brooch groove 16. ． ． ． ． ． ． Oil guide block 22. ． ． ． ． ． ． Lubrication pin 23. ． ． ． ． ． ． Axial hole 24. ． ． ． ． ． ． Tapered portion 25. ． ． ． ． ． ． Oil passage

Claims (1)

[Scope of utility model registration request] 1. A main body 3 having a taper shank portion 2 mounted in a taper hole of a spindle of a machining center and a broach holder portion 12 having a broach groove 13, and communicated with an oil passage 6 bored inside the main body. It has an oil passage 25 and is composed of an oil guide block 16 attached to the main body 3,
The oil passage 6 formed in the main body has a plurality of oil passages 7 that are opened to the end surface of the broach holder portion 12 via the broach grooves 13.
8, the spherical body 9 is rotatably fitted into each of the openings 10, and the oil guide block 16 is provided with an axial hole 23 and an axially orthogonal hole 19 intersecting the axial hole 23. A broach holder with an oil hole, in which the filled oil supply pin 22 is slidably accommodated in a state of being urged toward the end face of the machining center spindle.