JPH08290318A - Milling tools - Google Patents

Abstract

(57) [Abstract] [Object] The present invention provides a milling tool that forcibly discharges chips generated by a milling tool and does not cause troubles due to the generated chips, and further has an effect such as cooling of a cutting edge. Yes The purpose is to provide tools that support high-speed cutting and automation. In a milling tool having a milling tool body and a throw-away tip, a feeding hole provided in a central mounting hole or a mounting end face portion, and communicating with the feeding hole, and closer to the center than the throw-away tip. A nozzle having an injection opening opened in the front part of the milling tool body that is recessed from the front of the chip near the tip, and the injection direction is an adjustable nozzle, and the injection port is a shaft of the milling machine body. The opening is formed so as to be inclined toward the outer side on the throw-away tip side with respect to the center, and a ring-shaped groove having a width including the nozzle and the injection port is provided in the front portion in a circumferential shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a face milling machine used for plane cutting in a milling machine or the like, and more particularly to a milling tool with improved supply of compressed air.

[0002]

2. Description of the Related Art When a work material is flattened by a face mill, for example, with a milling machine, the generated chips are located between the front face of the milling cutter, which is closer to the center of the milling cutter, and the finished surface. There is a case where the cutting edge enters and deteriorates the roughness of the finished surface, or bites into the cutting edge of the throw-away tip to cause chipping of the cutting edge.
Therefore, for the purpose of eliminating the generated chips, in Japanese Utility Model Laid-Open No. 62-192819, the injection port is opened so as to be opened at the blade attachment portion of the front milling cutter, that is, at the attachment end portion such as the throw-away tip. There is an example in which it is provided so that it is ejected toward the cutting blade.

[0003]

However, the method using the external nozzle and the tool provided with the injection port in the tool body have one advantage and one disadvantage. First of all, in the case of external nozzles, end mills with a tool diameter of about 50 mm or less are relatively small, but in front face milling with a large tool diameter used for flat machining of large workpieces, compressed air is blown over the entire cutting part. This is difficult, and the problems caused by the above-mentioned chips cannot be eliminated. In addition, since compressed air is blown from the external nozzle, even small chips enter the inside of the cutting edge chip front side of the milling cutter and get caught in the rotating cutting edge, further worsening the roughness of the finished surface. Sometimes it was the cause of chipping and chipping of the cutting edge. Next, if the tool body is provided with an injection port, the action on the chip itself such as chip disposal and cooling of the cutting edge in the vicinity of the cutting edge is sufficient, but there is a drawback that it is not flexible like a nozzle. .

[0004]

SUMMARY OF THE INVENTION The present invention solves the above problems and provides a milling tool that does not cause troubles due to the generated chips. Further, it has sufficient functions such as cooling of the cutting edge and high-speed cutting / automation. The purpose is to provide a tool corresponding to.

[0005]

In order to achieve the above object, the present invention removably fixes a throw-away tip to a milling tool main body and a front outer peripheral portion of the main body at a predetermined circumferential interval. In a milling tool having a cutting edge portion, a feed pocket provided in a central mounting hole or a mounting end face portion of the milling tool body, and a tip pocket communicating with the feed hole and fixing the throw-away tip. A nozzle having an injection port opened in the section, and the injection direction of which can be adjusted to the injection port, and the nozzle is inclined outward with respect to the throw-away tip side with respect to the axial center of the milling machine body. The milling tool is more complete by opening it and providing a ring-shaped groove in a circumferential shape with a width including the nozzle and the injection port on the front surface.

[0006]

According to the present invention, an injection port is provided so as to open in the tip pocket portion of the milling tool, that is, the attachment end portion of the throw-away tip or the like, and a nozzle capable of changing the ejection direction is provided in the opening. By installing it, you can freely adjust its direction and angle.For example, when mainly cooling the cutting edge or scattering chips, aim at the vicinity of the cutting edge, and also if the chips are caught or scattered. If the main purpose is the removal of dust, etc., it can be adjusted by changing the direction slightly downward. Furthermore, by alternately providing these, or by providing a ring-shaped groove in a circular shape with a width including the nozzle and the injection port in the front part, and combining them so that chips are not caught in the bottom part of the milling machine, , Effective cutting can be performed. That is, the chips can be completely scattered in the range of 360 degrees in the circumferential direction of the front milling cutter and the entire bottom surface portion, and scattered. In addition, compressed air may be used depending on cutting conditions, a work material, or the like, or water-soluble or oil-based cutting fluid or its mist may be used. An embodiment of the present invention will be described below with reference to the drawings.

[0007]

1 is a sectional view of a front milling cutter as an embodiment of the present invention, and FIG. 2 is a bottom view of FIG. Figure 1
2, the front milling cutter body 1 includes a milling cutter body 1 having a central mounting hole 3 and a mounting end face portion 4 for mounting on the arbor 2, and a chip on the outer periphery of the front face of the milling cutter body 1 at predetermined intervals in the circumferential direction. It has a plurality of cutting edge portions which are provided continuously to the pocket portion 5 and to which the throw-away tip 7 can be detachably fixed by a wedge 6 having a clamp screw. Further, the central mounting hole 4 has a supply hole 8 for taking in compressed air supplied from the arbor, and the injection port 10 opened in the front portion 9 of the milling machine body 1 communicates with the supply hole 8. are doing.

Further, the number of the injection ports 10 is equal to the number of cutting edges,
Further, the compressed air is opened at an angle of θ with respect to the axial center of the milling cutter body 1 toward the outer side of the cutting edge so that the compressed air can be easily ejected toward the cutting edge located outside. Next, the nozzle 11 shown in FIGS. 3 and 4 is attached to the opening, and is fixed to the tool body by the screw 12 as shown in FIG. If the tip of the nozzle is used as the starting point, the direction of ejection will be 3
It can be adjusted dimensionally. In this nozzle, the length of the throw-away tip is the same as that of the throw-away tip, and the diameter is almost the same as the thickness of the throw-away tip, and it is sufficiently small. It can be sufficiently used for a tool such as a throw away end mill having a diameter of about 20 to 80 and a solid having a large diameter.

Further, the above nozzle is used on the outer peripheral portion of the milling tool, and in order to make it easier for compressed air to rotate to areas other than the vicinity of the cutting edge portion, a ring-shaped groove having a width including the injection port 10 is formed. It may be provided on the front face portion to more reliably prevent chips from entering the front face side of the milling machine body 1.
Incidentally, the present invention is not limited to the above embodiments, it can be applied to various face mills within the scope of the idea of the present invention, the size and number of the injection port, the position, etc., of the face mill It can be appropriately selected according to the size and the material of the work material.

[0010]

According to the present invention, the compressed air is supplied to the front face milling machine by providing the injection nozzle for ejecting the compressed air in the front face portion of the milling cutter body closer to the center side than the throw-away tip of the cutting edge portion of the milling tool. Since it ejects at a wide angle from the center side to the outer peripheral side with the throw-away tip, the chips are completely removed outside in the range of 360 degrees on the circumference of the front milling cutter, and the chips enter the inside of the front milling cutter. It is possible to provide a milling tool that does not cause troubles due to chips such as deterioration of finished surface roughness due to the above, further deterioration of finished surface roughness due to biting of the chips, and chipping of the cutting edge. Further, in milling with a machining center equipped with an ATC device, by blowing compressed air from the inside of the milling cutter to the outside with the throw-away tip, there is no fear of chipping troubles even in machining in which the cutting direction changes, and Even if the tool is changed, the compressed air can always be ejected in an ideal state, so that unmanned operation can be made more reliable.

[Brief description of drawings]

FIG. 1 shows a sectional view of a face mill according to the present invention.

2 shows a bottom view of FIG.

FIG. 3 shows a cross-sectional view of the nozzle used in FIG.

FIG. 4 shows a right side view of FIG.

[Explanation of symbols]

 1 Front milling cutter body 2 Arbor 3 Central mounting hole 4 Mounting end face part 5 Tip pocket part 6 Wedge 7 Throw-away tip 8 Feed hole 9 Front part of front milling cutter 10 Nozzle 12 Screw 12

Claims (3)

[Claims] 1. A milling tool body comprising: a milling tool body; and a cutting edge portion to which a throw-away tip is removably fixed at a circumferentially outer peripheral portion of the body at a predetermined interval in the circumferential direction. And a supply hole provided in a central mounting hole or a mounting end surface of the device, and an injection port communicating with the supply hole and opened in a chip pocket part for fixing the throw-away chip, and A milling tool characterized by a nozzle with an adjustable injection direction at the injection port. 2. The milling tool according to claim 1, wherein
A milling tool, wherein the injection port is adjusted so as to be inclined outward with respect to the throw-away tip side with respect to the axial center of the milling machine body. 3. The milling tool according to claim 1, wherein the injection port is provided with a ring-shaped groove in a front surface portion in a circumferential shape having a width including the injection port.