JPH05169308A - Gun drill and end mill - Google Patents

Abstract

PURPOSE:To precisely inject a cutting liquid at the time of cutting work in the machining center. CONSTITUTION:A circulating path 36 is formed in an end mill 31, for example, and plural nozzles 37 communicating with the circulating path 36 are formed on the outer peripheral surface of an edge portion. At the time of cutting work using a machining center, a cutting liquid is supplied in the circulating path 36 to inject the cutting liquid to a portion to be cut of a workpiece through the nozzles 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gun drill and an end mill mounted on a machining center or the like for use.

[0002]

2. Description of the Related Art For example, a machining center such as that shown in FIG. 5 is used for processing such as punching and milling in die manufacturing. In this machining center, a table 3 is supported on a base 1 via a saddle 2. The table 3 is moved in the left-right direction (X direction) and the front-back direction (Y direction) with respect to the base 1 by driving a driving source (not shown).
A pallet 4 is mounted on the table 3. The work piece 5 is detachably attached to the upper surface of the pallet 4. A column 6 is provided on the rear side of the base 1, and a spindle head 7 is supported on the column 6. The spindle head 7 is moved in the vertical direction (Z direction) by driving a driving source (not shown). And, in the spindle head 7,
A main shaft 8 is provided which is rotationally driven with the Y direction as the rotational axis direction. A chuck 11 to which a tool holder 10 that detachably holds various tools 9 for cutting or the like is detachably attached is provided at the tip of the main shaft 8. Although not shown, the spindle head 7 is provided with a nozzle for injecting cutting fluid. A tool magazine 12 is provided at a lateral position of the column 6.
This tool magazine 12 can be used, for example, in a rotating chain,
A plurality of holding portions (13) for holding the tool holder (10) in a removable manner are arranged side by side. Further, the tool magazine 12
An automatic tool changer (ATC) 14 is provided between the spindle and the spindle 8. As is well known, the ATC 14 automatically changes the tool 9 between the tool magazine 12 and the spindle 8. Then, at the time of cutting, cutting of the workpiece 5 mounted on the pallet 4 is performed by the tool 9 rotating with the spindle 8. At that time, the table 3 is appropriately moved in the Y direction or the X direction, and the spindle 8 is moved up and down together with the spindle head 7. Further, during cutting, cutting fluid is jetted from the nozzle toward the tool 9 and the workpiece 5. Further, the tool 9 attached to the spindle 8 is replaced by the ATC 14 as required.

The tools 9 used in such a machining center include a gun drill for drilling deep holes and an end mill for milling. And conventionally, the gun drill and the end mill used in the machining center had a non-hollow structure.

[0004]

As described above, conventionally, in a machining center in which various tools 9 such as gun drills and end mills are used, at the time of cutting, the tool 9 and the tool 9 are machined from a nozzle separate from the tool 9 itself. Since the cutting fluid is jetted toward the object 5, there is a problem that the cutting fluid cannot be jetted appropriately for each of various tools 9 such as a gun drill and an end mill.

The present invention is intended to solve such a problem, and in a machining center or the like in which various tools are used, it is possible to accurately inject a cutting fluid during cutting. It is intended to provide gun drills and end mills.

[0006]

The gun drill of the present invention comprises:
In order to achieve the above-mentioned object, in a gun drill having a blade portion provided at a tip portion of an elongated shank, a hole-shaped flow passage is formed in the shank along an axial direction thereof, and the tip surface of the blade tip portion is formed. A plurality of jet outlets are formed so as to communicate with the flow passage.

Further, in order to achieve the above object, the end mill of the present invention is an end mill in which a shank is provided with a blade at the tip thereof, and the blade has an outer peripheral blade on the outer peripheral surface and a bottom blade on the front end surface. A hole-shaped flow passage is formed in the shank and the blade portion along the axial direction thereof, and a plurality of ejection openings are formed in the outer peripheral surface of the blade portion so as to communicate with the flow passage.

[0008]

The gun drill according to the present invention is used by being attached to a machining center or the like to punch a workpiece.
That is, by being rotationally driven and moving in the axial direction, the cutting edge portion provided at the tip of the elongated shank cuts the workpiece, and a deep hole is formed in the workpiece. Then, during such a cutting process, cutting fluid is supplied to the hole-shaped flow passage in the shank, and the cutting fluid is ejected from a plurality of ejection openings on the tip surface of the cutting edge portion toward the cutting site of the workpiece.

Further, the end mill of the present invention is used by being attached to a machining center or the like and mills a workpiece. That is, while being rotationally driven, it moves in a direction orthogonal to the axial direction and the like, and the outer peripheral blade or the bottom blade of the blade portion provided at the tip of the shank cuts the workpiece. Then, during the cutting process, the cutting fluid is supplied to the shank and the hole-shaped flow passage in the blade portion, and the cutting fluid is ejected from the plurality of ejection ports on the outer peripheral surface of the blade portion toward the cutting portion of the workpiece.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. First, an embodiment of the gun drill of the present invention will be described with reference to FIGS. 1 and 2. The machining center in which the gun drill 21 of this embodiment is used may be of various types, for example, as shown in FIG. 5 described above. The gun drill 21 is a tool holder.
An elongated shank 22 attached to 10, and this shank 22
And a cutting edge portion 23 having a larger diameter provided at the tip of the. The cutting edge portion 23 is, for example, a cemented carbide tip attached to the tip of the shank 22. A groove portion 24 is formed on the outer peripheral surface of the cutting edge portion 23 along the axial direction thereof. Then, in the shank 22 of the gun drill 21, a linear hole-like flow passage 25 is formed along the axial direction thereof, and the cutting edge portion 23
The tip surface of the pair of jet ports is connected to the flow passage 25.
An opening 26 is formed. On the other hand, the main spindle 8 of the machining center has a flow passage for the gun drill 21 attached thereto.
A flow passage 29 communicating with 25 is formed.
Is connected to a cutting fluid supply source 30 that supplies a cutting fluid such as water, a water-soluble cutting fluid, or cutting oil.

Next, the operation of the above configuration will be described. The gun drill 21 is used by being attached to a spindle 8 of a machining center via a tool holder 10 and a chuck 11, and is used for making a hole in a workpiece 5 mounted on a pallet 4. Then, at the time of this processing, the table 3 is appropriately moved in the X direction, and the spindle 8 is moved up and down to position the gun drill 21 with respect to the workpiece 5, and while rotating the gun drill 21 together with the spindle 8, The table 3 is moved backward in the Y direction. Along with that, the cutting edge of the gun drill 21
23 is cutting the workpiece 5 while advancing in the axial direction with respect to the workpiece 5. As a result, a deep hole is machined in this workpiece 5. During such cutting, cutting fluid supply source 30
The cutting fluid supplied from the nozzles is jetted from the pair of jet ports 26 on the tip surface of the cutting edge portion 23 toward the cutting portion of the workpiece 5 through the main shaft 8 and the flow passages 29 and 25 in the gun drill 21. In addition,
The jetted cutting fluid and cutting chips are discharged to the outside of the workpiece 5 through the groove 24 of the cutting edge 23 and the processed hole itself.

Next, one embodiment of the end mill of the present invention will be described with reference to FIGS. 3 and 4. The machining center in which the end mill 31 of this embodiment is used is the same as that of the embodiment of the gun drill 21. The end mill 31 has a shank 32 attached to the tool holder 10.
And a blade portion 33 integrally provided at the tip of this shank 32.
It consists of The blade portion 33 has a spiral outer peripheral blade 34 on the outer peripheral surface and a bottom blade 35 on the front end surface. Then, in the shank 32 and the blade portion 33 of the end mill 31, a linear hole-shaped flow passage 36 is formed along the axial direction thereof, and the outer peripheral surface of the blade portion 33 is communicated with the flow passage 36. A plurality of jet ports 37 are formed as openings.

Next, the operation of the above configuration will be described. The end mill 31 is used by being attached to a spindle 8 of a machining center via a tool holder 10 and a chuck 11, and is used for milling a workpiece 5 mounted on a pallet 4. During this processing, the table 3 is appropriately moved in the X and Y directions, and the end mill 31 is rotated together with the main shaft 8 while vertically moving the main shaft 8, and the outer peripheral blade 34 or the bottom blade 35 of the end mill 31 is used for machining. The object 5 is cut.
During such cutting, the cutting fluid supplied from the cutting fluid supply source 30 passes through the flow passages 29 and 36 in the main shaft 8 and the end mill 31, and is ejected from the plurality of ejection openings 37 on the outer peripheral surface of the blade portion 33 to the workpiece. 5
Eject toward the cutting part of. Further, cutting fluid is jetted toward the end mill 31 and the workpiece 5 from a nozzle provided on the spindle head 7 separately from the tool.

According to the configurations of both the embodiments, the gun drill
21 and the end mill 31 themselves, the flow passages 25 and 36 and the spout 26,
Since 37 is formed and the cutting fluid is supplied to the flow passages 25 and 36 and ejected from the ejection ports 26 and 37 at the time of cutting, in a machining center where various tools are used, at the time of cutting, The cutting fluid can be jetted accurately according to the tool.

The present invention is not limited to the above embodiment, but various modifications can be made. For example,
Although there are various shapes of gun drills and end mills, of course, the shapes of the gun drills and end mills are not limited to those in the above-mentioned embodiment, and the present invention can be applied to gun drills and end mills of various shapes.

[0016]

According to the present invention, since the flow passage and the plurality of jets communicating with the flow passage are formed in the gun drill or the end mill itself, the cutting fluid is supplied to the flow passage during the cutting process. It is possible to precisely inject the cutting fluid at the time of cutting in a machining center or the like where various tools are used by ejecting the cutting fluid from the nozzles.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a gun drill of the present invention.

FIG. 2 is a cross-sectional view of a tip portion of the above gun drill.

FIG. 3 is a side view showing an embodiment of the end mill of the present invention.

FIG. 4 is a sectional view of a tip portion of the same end mill.

FIG. 5 is a perspective view showing an example of a machining center.

[Explanation of symbols]

 21 Gun Drill 22 Shank 23 Blade 25 Flow Groove 26 Jet 31 End Mill 32 Shank 33 Blade 34 Peripheral Blade 35 Bottom Blade 36 Flow Path 37 Jet

Claims (2)

[Claims] 1. A gun drill having a blade portion at the tip of an elongated shank, wherein a hole-shaped flow passage is formed in the shank along the axial direction thereof, and the flow passage is provided at the tip surface of the blade tip. A gun drill characterized in that a plurality of jet ports are formed to communicate with each other. 2. An end mill in which a shank is provided with a blade portion at its tip, and the blade portion has an outer peripheral blade on its outer peripheral surface and a bottom blade on the front end surface, and a hole is formed in the shank and the blade portion along its axial direction. An end mill having a plurality of ejection openings formed in the outer peripheral surface of the blade so as to communicate with the flow passage.