JP6390477B2 - Scalping cutter - Google Patents

Description

  The present invention relates to a sculpting cutter for cutting the front and back surfaces of a plate material such as a rolled metal material.

  For example, when a long sheet-shaped plate (metal rolled material) is formed by hot rolling a metal material made of a copper alloy or the like, an oxide layer (oxide film) or dirt on the front and back surfaces of the plate is removed. Processing is required. For this process, a sculpting cutter (surface milling tool) capable of efficiently and widely cutting the front and back surfaces of the plate material is used.

The sculpting cutter has a cylindrical cutter body that is rotated around an axis, and a cutting blade that is formed on the outer peripheral surface of the cutter body so as to gradually twist in the circumferential direction around the axis as it goes in the axial direction. It is equipped with. Further, a plurality of cutting edges are provided on the outer peripheral surface of the cutter body at intervals in the circumferential direction. In general, the cutting edge is constituted by a plurality of cutting edges of a plurality of cutting tips arranged in a spiral shape on the outer peripheral surface of the cutter body.
The sculpting cutter is installed in the chamfering device so that the axis of the cutter body is along the horizontal direction, and the upper surface (front surface) and the lower surface (back surface) of the plate material, which is the work material, is cut to peel thin skin To do.

When cutting a plate with a sculpting cutter, coolant (oil-based or water-soluble cutting fluid) is supplied to the cutting edge and the processed part of the plate in order to ensure chip discharge while cooling the cutting edge. The
For example, Patent Document 1 below discloses a chamfering device in which a cutting oil injection nozzle that sprays cutting oil onto a plate material is provided in the vicinity of a guide that guides the plate material toward a sculpting cutter. As described above, in the conventional chamfering device, the coolant is supplied toward the processed portion and the cutting edge of the plate material by using a small empty space around the sculpting cutter.

JP 7-276125 A

However, since the cutting edge of the sculpting cutter extends over substantially the entire length of the cutter body, it has been difficult to supply the coolant evenly and stably to the cutting edge and the work material.
For this reason, there has been a problem that the cutting edge is not sufficiently cooled to affect the cutting performance, and the chip dischargeability cannot be ensured. Specifically, there are problems such as welding or chipping on the cutting edge, resulting in poor surface roughness of the work surface of the work material, chip clogging, and reduction in processing efficiency.

  The present invention has been made in view of such circumstances, and can uniformly and stably supply coolant to the cutting edge and the work portion of the work material. An object of the present invention is to provide a sculpting cutter that can efficiently cool the chip, improve the chip dischargeability, and can stably perform highly accurate and highly efficient chamfering.

In order to solve such problems and achieve the above object, the present invention proposes the following means.
That is, the sculpting cutter of the present invention extends to an outer peripheral surface of the cylindrical cutter body rotated around the axis and gradually twists in the circumferential direction around the axis in the axial direction. A cutting edge formed, a trunk hole extending in the axial direction inside the cutter body, and a branch hole communicating with the trunk hole and opening on an outer peripheral surface of the cutter body, the opening of the branch hole Is arranged adjacent to the cutting edge in the cutter rotation direction in the circumferential direction, and is opposed to the cutting edge, provided with a nozzle at the opening of the branch hole, A groove portion extending along the extending direction of the cutting edge is formed .

  According to the sculpting cutter of the present invention, the coolant can be stably supplied to the cutting edge and the work material from the trunk hole formed in the cutter body through the branch hole. That is, through the inside of the cutter body, the coolant can be accurately and stably supplied to the entire cutting edge and the entire processing portion of the work material on which the cutting edge is faced.

  Specifically, the branch hole that opens to the outer peripheral surface of the cutter body is disposed opposite to the cutting edge, that is, the coolant sprayed from the branch hole is the cutting edge and the work material to be cut by the cutting edge. It is directly applied to the processed part (processed surface). Therefore, the cutting edge can be efficiently cooled, and the chip discharge performance is improved.

In addition, for example, by appropriately setting the opening shape and the numerical aperture of the branch hole in accordance with the cutting edge length and the like, the coolant can be easily distributed over the entire cutting edge and the entire processing portion of the work material.
Specifically, for example, even when the cutting blade is constituted by a plurality of cutting blades arranged in a spiral shape on the outer peripheral surface of the cutter body, according to the present invention, all of these cutting blades (that is, cutting blades) are used. It is possible to spread the coolant over the entire blade. Thereby, since the cutting performance of the whole cutting edge is stably maintained, the surface roughness of the processed surface of the work material can be maintained with high accuracy.

  Further, in the present invention, since the coolant is supplied through the inside of the cutter body, it is not necessary to use a small space of the chamfering device around the sculpting cutter as in the prior art, and it is stable even in various equipment modes. It is possible to achieve the effects obtained.

As described above, according to the present invention, the coolant can be uniformly and stably supplied to the cutting edge and the work portion of the work material, the cutting edge can be efficiently cooled, and the chip can be discharged. It is possible to improve the accuracy and to stably perform highly accurate and highly efficient chamfering.
Further, the coolant flowing in the nozzle is guided by the groove portion on the nozzle front end surface and sprayed along the extending direction of the cutting edge. For this reason, coolant can be supplied to the cutting edge in a wide range and evenly. Moreover, since the useless injection of the coolant toward the part other than the cutting edge is suppressed, the cooling efficiency is further improved.
Specifically, for example, a cat's eye (cat eye shape) nozzle is preferably employed as the nozzle. The cat's eye nozzle has a circular hole that communicates with the branch hole of the cutter body, and the groove that is disposed adjacent to the nozzle tip side of the circular hole and communicates with the circular hole. The length is made larger than the inner diameter of the circular hole. Then, by appropriately setting the opening shape of the groove portion in accordance with the cutting edge length, the arrangement of the branch holes, etc., the aspect ratio of the coolant sprayed from the nozzle (how to spread the spray) can be expected.

  In the sculpting cutter of the present invention, it is preferable that a plurality of the branch holes are provided along the extending direction of the cutting edge.

  In this case, it becomes easy to supply the coolant evenly over the entire length of the cutting edge, and the above-described effects can be obtained more stably.

  In the sculpting cutter of the present invention, it is preferable that a nozzle is provided at the opening of the branch hole, and a central axis of the nozzle hole of the nozzle is inclined with respect to a central axis of the branch hole.

  By providing the nozzle at the opening of the branch hole as in the above configuration, the opening of the branch hole (that is, the opening of the nozzle hole) can be more reliably opposed to the cutting edge. Specifically, for example, the trunk hole is located on the axis inside the cutter body, and the central axis of the branch hole communicating with the trunk hole extends along the radial direction of the cutter body, but the branch extending in the radial direction. It may be difficult to make the opening of the hole face the cutting edge. Therefore, it is preferable to incline with respect to a part other than the opening so that the opening of the branch hole is opposed to the cutting edge (bend by changing the direction of the branch hole in the opening part). It is easy to provide a nozzle at the opening of the hole, and the effect is surely obtained. That is, it becomes easy to arrange the cutting edge in the vicinity of the extension line of the central axis of the nozzle hole, and the above-described operational effects become particularly remarkable.

  In the sculpting cutter of the present invention, it is preferable that a nozzle is provided in the opening of the branch hole, and the nozzle is accommodated in the opening.

  In this case, the nozzle can be accommodated inside the opening of the branch hole, and the nozzle can be prevented from protruding toward the cutting edge. Specifically, unlike the above-described configuration, for example, when the nozzle protrudes from the opening of the branch hole, there is a possibility that chips are likely to be caught on the nozzle, and in this case, the chip dischargeability may be affected. There is. On the other hand, according to the above-described configuration of the present invention, chips are not easily caught on the nozzle, so that coolant injection from the nozzle toward the cutting blade and the work material can be performed stably without being disturbed by the chips.

  Further, since the nozzle is accommodated in the opening of the branch hole, a large distance from the nozzle tip surface to the cutting edge can be secured. As a result, the coolant sprayed from the nozzle is easily diffused over a wide range before reaching the cutting edge, and the above-described effects can be made even more remarkable.

  Further, in the sculpting cutter of the present invention, a plurality of the cutting edges are provided on the outer peripheral surface of the cutter body at intervals in the circumferential direction, and the cutting edges adjacent to each other in the circumferential direction face each cutting edge. The branch holes that are opened may be arranged at different positions in the axial direction.

  For example, unlike the above configuration, when branch holes of cutting edges adjacent in the circumferential direction are arranged at the same position in the axial direction, the branch holes are easily arranged closer to each other in the circumferential direction. There are cases where the rigidity of the cutter body tends to decrease at the portion. Therefore, by adopting the above configuration of the present invention, the branch holes of the cutting blades adjacent in the circumferential direction are reliably separated in the circumferential direction, and the rigidity of the cutter body is ensured.

  According to the sculpting cutter of the present invention, the coolant can be uniformly and stably supplied to the cutting edge and the work portion of the work material, the cutting edge can be efficiently cooled, and chip discharge performance can be achieved. It is possible to improve the accuracy and to stably perform highly accurate and highly efficient chamfering.

It is a figure which shows the sculpting cutter which concerns on one Embodiment of this invention. It is a cross-sectional view (II-II cross-sectional view of FIG. 1) of the sculpting cutter. It is an enlarged view (III part enlarged view of FIG. 2) which shows the principal part of a sculpting cutter. It is a figure explaining the variation (modification) of arrangement | positioning of a branch hole, (a) IVa-IVa sectional drawing of FIG. 1, (b) IVb-IVb sectional drawing of FIG.

  Hereinafter, a sculpting cutter (facing tool) 10 according to an embodiment of the present invention and a chamfering apparatus 1 including the same will be described with reference to the drawings.

[Schematic configuration of sculpting cutter]
As shown in FIGS. 1 to 3, the sculpting cutter 10 of this embodiment is a chamfering tool that performs a process of removing oxide layers (oxide films) and dirt on the front and back surfaces of a plate material that is a work material W. And this board | plate material is a elongate sheet material which hot-rolled the metal raw material which consists of copper alloys etc., for example.
In the example shown in FIG. 2, the sculpting cutter 10 cuts the surface (upper surface) of the work material W. However, together with or instead of the sculpting cutter 10, the chamfering device of the present embodiment. 1 may be provided with another sculpting cutter 10 for cutting the back surface (lower surface) of the work material W.

The sculpting cutter 10 is formed in a columnar shape around the axis O and is rotated around the axis O, and is connected to both ends of the cutter main body 11 in the direction of the axis O, and is paired with the axis O coaxially. And a rotating shaft portion 12. In this embodiment, the cutter main body 11 and the rotating shaft part 12 are integrally formed, for example with steel materials, such as SCM440.
The sculpting cutter 10 is disposed in the chamfering device 1 so that the axis O of the cutter body 11 is along the horizontal direction, and applies a thin skin to the upper surface (front surface) and lower surface (back surface) of the plate material that is the work material W. Cutting to peel off.

[Definition of orientation used in this specification]
Here, in this specification, the direction in which the axis O of the cutter body 11 extends is referred to as the axis O direction, and the direction from the rotary shaft portion 12 along the axis O direction toward the cutter body 11 is the inner side (center side) of the axis O direction. ), And the direction from the cutter body 11 toward the rotary shaft 12 along the axis O direction is referred to as the outside in the axis O direction.
In addition, a direction perpendicular to the axis O is referred to as a radial direction, and a direction approaching the axis O in the radial direction is referred to as a radial inner side, and a direction away from the axis O is referred to as a radial outer side.
Further, the direction around the axis O is referred to as the circumferential direction, and the direction in which the cutter body 11 is rotated in the circumferential direction is referred to as the cutter rotation direction T, and the opposite direction is opposite to the cutter rotation direction T. The side.

[Cutter body]
As shown in FIG. 1, a groove 13 is formed on the outer peripheral surface of the cutter body 11 so as to be gradually twisted in the circumferential direction toward the axis O direction. A plurality of grooves 13 are formed on the outer peripheral surface of the cutter body 11 at intervals in the circumferential direction. These grooves 13 each have a spiral shape having a predetermined twist angle, and are formed in parallel to each other.
The groove 13 serves as a pocket for temporarily storing chips of the work material W faced by the sculpting cutter 10. The chips temporarily accommodated in the groove 13 are generally discharged out of the groove 13 until a cutting edge 20 described later corresponding to the groove 13 cuts into the workpiece W next time. The

  As shown in FIGS. 2 and 3, a tip seat 14 is formed on the wall surface 13 a facing the cutter rotation direction T in the groove 13. A cutting tip 15 made of a hard material such as cemented carbide is attached to the tip seat 14 by a fixing means such as brazing. A plurality of cutting tips 15 are provided along the extending direction of the grooves 13 to form a row.

  The chip seat 14 may be formed in a groove shape that is recessed from the wall surface 13 a and extends along the extending direction of the groove 13, or a plurality of chip seats 14 that are recessed from the wall surface 13 a and extending in the extending direction of the groove 13. The formed recessed part (parallelogram hole-shaped recessed part corresponding to the shape of the cutting tip 15 mentioned later) may be sufficient. Moreover, the chip seat 14 may not be formed in a concave shape, and the plane constituting the wall surface 13a may be used as the chip seat 14 as it is.

[Cutting tips and cutting edges]
Although not shown in particular, in this embodiment, the cutting tip 15 is formed in a parallelogram plate shape.
In FIG. 3, the cutting tip 15 includes a rake face 16 facing the cutter rotation direction T, a flank face 17 facing radially outward, and a tip blade 18 forming a ridge line between the rake face 16 and the flank face 17. Have. In the cross sectional view of the sculpting cutter 10 shown in FIG. 3 (sectional view perpendicular to the axis O), the rake angle of the tip blade 18 is a positive angle (positive angle).

In FIG. 1, the tip blades 18 of a plurality of cutting tips 15 arranged along the extending direction of the groove 13 are arranged so as to coincide with the virtual chord winding extending along the extending direction of the groove 13. These chip blades 18 constitute a single cutting edge 20.
That is, a cutting edge 20 extending so as to gradually twist in the circumferential direction as it goes in the direction of the axis O is formed on the outer peripheral surface of the cutter body 11. In this embodiment, the cutting edge 20 extends along the groove 13. The plurality of cutting blades 15 are arranged with a plurality of cutting blades 18.

  In addition, in the longitudinal cross-sectional view (cross-sectional view along the direction of the axis O) of the sculpting cutter 10 shown below the axis O in FIG. Instead of being illustrated as a straight line parallel to the axis O.

A plurality of cutting edges 20 are formed corresponding to each groove 13. That is, a plurality of cutting edges 20 are provided on the outer peripheral surface of the cutter body 11 at intervals in the circumferential direction. Corresponding to the grooves 13 adjacent in the circumferential direction being formed in parallel with each other, the cutting edges 20 adjacent in the circumferential direction are also formed in parallel with each other. Further, these cutting edges 20 each have a spiral shape having a predetermined twist angle. In addition, in the example of this embodiment shown by FIG. 2, the cutting blade 20 and the groove | channel 13 are formed 20 each.
2 and 3, the tip blade 18 (cutting blade 20) of the cutting tip 15 mounted on the tip seat 14 is disposed so as to protrude radially outward from the outer peripheral surface of the cutter body 11.

  As shown in FIG. 1, a nick 19 that is a slight gap is formed between adjacent cutting tips 15 along the groove 13. Since the nick 19 is formed, the cutting blade 20 is actually divided between the chip blades 18 of the cutting chips 15 to be arranged. The nick 19 extends along a virtual plane perpendicular to the axis O in order not to make the intersecting ridge line between the side surface (the end surface facing the extending direction of the groove 13) of the cutting tip 15 and the rake face 16 function as a blade. Preferably it is.

[Coolant supply path]
A coolant supply path 30 is formed inside the sculpting cutter 10. The coolant supply path 30 is a flow path through which coolant (oil-based or water-soluble cutting fluid) flows. The coolant is caused to flow from the outside of the sculpting cutter 10 into the coolant supply path 30, flows through the coolant supply path 30, and is sprayed toward the cutting edge 20 (chip edge 18).
In FIG. 2, the coolant supply path 30 includes a trunk hole 31 extending in the direction of the axis O inside the cutter body 11, and a branch hole 32 communicating with the trunk hole 31 and opening on the outer peripheral surface of the cutter body 11. doing.

[Stem hole]
The trunk hole 31 is a through hole having a circular cross section that penetrates the cutter body 11 and the rotary shaft portion 12 in the direction of the axis O. The trunk hole 31 is disposed at the center in the radial direction of the cutter body 11 so that the center axis thereof coincides with the axis O of the cutter body 11. In the example shown in FIG. 1, the inner diameters of both ends of the trunk hole 31 are made larger than the inner diameters of portions other than the both ends.

  A coolant supply means (not shown) of the chamfering apparatus 1 is connected to at least one of both ends (opening end portions) of the stem hole 31 in the axis O direction. The coolant is supplied toward the inside of 31. By connecting the coolant supply means to the stem hole 31, the coolant can be stably supplied to the sculpting cutter 10 without using a large structure outside the sculpting cutter 10 as in the prior art.

  In addition, when a coolant supply means is connected only to one end part among the both ends of the axial line O direction of the trunk hole 31, the other end part is used to close the opening of the trunk hole 31 in the other end part. Preferably a closing means is provided.

  The closing means may be inserted into the trunk hole 31 or provided outside the trunk hole 31. Although not shown in particular, a specific example of the case where the closing means is provided inside the trunk hole 31 includes a plug member that fits into or is screwed into the trunk hole 31. Further, as a specific example when the closing means is provided outside the trunk hole 31, there is a bearing member or the like that is fitted to the rotary shaft portion 12 from the outside in the radial direction and closes the opening of the other end portion of the trunk hole 31. Can be mentioned.

[Branch hole]
In FIG. 2, the branch hole 32 communicates with the trunk hole 31 and extends along the radial direction, and has a circular cross section. The end of the branch hole 32 opposite to the trunk hole 31 (end on the outside in the radial direction) is open to the outer peripheral surface of the cutter body 11.
As shown in FIG. 3, in the present embodiment, the branch hole 32 opens to the wall surface 13 b facing the opposite side of the cutter rotation direction T in the groove 13 in the outer peripheral surface of the cutter body 11. That is, the branch hole 32 is opened in a back side portion of the chip seat 14 called a back metal in the cutter body 11.

  In FIG. 3, the opening of the branch hole 32 is disposed adjacent to the cutting edge 20 in the cutter rotation direction T, and faces the cutting edge 20. In the present embodiment, the nozzle 33 is provided at the opening (opening 32 a) of the branch hole 32. Accordingly, the nozzle hole 33 a of the nozzle 33 is a substantial opening of the branch hole 32, and is disposed opposite to the cutting edge 20.

  Specifically, in the present embodiment, the inner diameter of the opening 32a of the branch hole 32 is larger than the inner diameter of the portion 32b other than the opening 32a, and the inner peripheral surface of the opening 32a A female screw portion is formed. The nozzle 33 has a disk shape or a columnar shape, and a male thread portion is formed on the outer peripheral surface of the nozzle 33. The nozzle 33 is detachably screwed into the opening 32a of the branch hole 32 by screwing the female screw portion and the male screw portion. The nozzle 33 is housed inside the opening 32 a of the branch hole 32.

  The central axis C2 of the nozzle hole 33a of the nozzle 33 is inclined with respect to the central axis C1 of the branch hole 32. Specifically, the center axis C2 of the nozzle hole 33a extends so as to be non-parallel and intersect with the center axis C1 of the portion 32b other than the opening 32a of the branch hole 32. Specifically, in the cross-sectional view of the sculpting cutter 10 shown in FIG. 3, the acute angle (oblique angle) of the acute angle and the obtuse angle formed between the central axes C1 and C2 is 30 to 60 °. Yes, and more preferably 40 to 50 °.

And the cutting blade 20 is arrange | positioned in the vicinity on the extension line | wire of the central axis C2 of the nozzle hole 33a. In the present embodiment, the central axis C2 of the nozzle hole 33a extends so as to be orthogonal to the wall surface 13b of the groove 13, so that the opening of the nozzle hole 33a is opposed to the cutting edge 20.
Since the opening of the nozzle hole 33a (the opening of the branch hole 32) only needs to face the cutting edge 20, the opening may be arranged on the bottom surface 13c of the groove 13 depending on the shape of the groove 13.

  Further, the central axis C2 of the nozzle hole 33a is arranged coaxially with respect to the central axis in the opening 32a of the branch hole 32. In the illustrated example, the inner diameter of the nozzle hole 33a and the inner diameter of the portion 32b other than the opening 32a of the branch hole 32 are substantially the same diameter.

  As the nozzle 33 of the present embodiment, a so-called cat's eye (cat eye shape) nozzle can be used. Although not particularly shown, the cat's eye nozzle is connected to a circular hole communicating with the branch hole 32 (part 32b other than the opening 32a) of the cutter body 11, and adjacent to the nozzle tip side of the circular hole. And a groove portion to be disposed. The groove width of the groove portion is the same as or smaller than the inner diameter of the circular hole, and the groove length of the groove portion is larger than the inner diameter of the circular hole. And this groove part is formed in the front end surface (end surface which faces the cutting blade 20 side) of the nozzle 33 so as to extend along the extending direction (blade length direction) of the cutting blade 20.

  In the cutter body 11, a plurality of branch holes 32 are provided along the extending direction of the cutting edge 20. That is, the openings of the plurality of branch holes 32 are disposed to face the single cutting edge 20. The plurality of branch holes 32 are arranged at equal intervals or at unequal intervals along the extending direction of the cutting edge 20.

  In the example of the present embodiment shown in FIG. 2, the branch holes 32 that open toward the respective cutting edges 20 are all arranged at the same position in the axis O direction. However, the present invention is not limited to this. For example, as shown in FIG. 4A (a sectional view taken along the line IVa-IVa in FIG. 1) and FIG. 4B (a sectional view taken along the line IVb-IVb in FIG. 1). In addition, the branch holes 32 of the cutting bodies 20 that are adjacent to each other in the circumferential direction in the cutter body 11 and that open to face the cutting edges 20 may be arranged at different positions in the axis O direction.

  Specifically, in this modification, a part of the cutter body 11 along the axis O direction faces the even-numbered (multiple of 2) -th cutting edge 20 out of all (20) cutting edges 20 and has a branch hole. 32 is open, and the branch holes 32 are not open to the odd-numbered cutting edges 20. Further, in other parts different from the above-mentioned part along the axis O direction of the cutter body 11, branch holes 32 are opened facing the odd-numbered cutting edges 20 among all the cutting edges 20, and even-numbered The branch hole 32 is not open to the cutting edge 20. The configuration of the part and the configuration of the other part are alternately arranged in the axis O direction in the cutter body 11.

Further, as a variation of the arrangement of the branch holes 32 other than the above, for example, in a part along the axis O direction of the cutter body 11, among all the cutting blades 20, the branching blades 20 face the multiple multiple cutting blades 20. It is also possible to adopt a configuration in which the holes 32 are opened and the branch holes 32 are not opened with respect to the cutting edge 20 of the multiple of 3 ± 1 or the multiple of 3 ± 2. In this case, a branch hole 32 is opened opposite to the multiple 3 ± 1 and the multiple 3 ± 2 of the cutting edge 20 in another portion different from the above portion along the axis O direction of the cutter body 11. It will be.
In addition, the variation of the arrangement of the branch holes 32 can be applied to a multiple of 4, a multiple of 5,..., A multiple of n (n is a natural number) other than the multiple of 3 described above. Furthermore, you may arrange | position at non-uniform intervals, without arrange | positioning at equal magnification (n times).

[Rotating shaft]
In FIG. 1, the rotating shaft portion 12 has a smaller diameter than the cutter body 11, and the rotating shaft portion 12 is formed with a tapered portion 12a that gradually decreases in diameter toward the outside in the direction of the axis O. The sculpting cutter 10 is supported by fitting a taper portion 12a of the rotary shaft portion 12 to a bearing member (not shown) of the chamfering device 1. The rotating shaft 12 is connected to a drive motor (not shown) of the chamfering apparatus 1, and the sculpting cutter 10 is rotated in the cutter rotation direction T by the drive motor.

[Cover member]
In FIG. 2, a cover member 2 of the chamfering device 1 is provided on the radially outer side of the cutter body 11 of the sculpting cutter 10 so as to cover the cutter body 11.
In the illustrated example, the cover member 2 covers a portion other than the portion facing the work material W (the portion disposed close to the work material W) in the periphery of the cutter body 11 in the radial direction. It is formed in a C-shaped cross section. The cover member 2 is disposed with a predetermined gap between the cover body 11 and the cutter body 11. By providing the cover member 2, it is possible to prevent the coolant sprayed from the branch hole 32 of the sculping cutter 10 from being scattered around and affecting the chamfering device 1 and the work environment.

[Effects of this embodiment]
According to the sculpting cutter 10 of the present embodiment described above, the coolant is stabilized with respect to the cutting edge 20 and the work material W through the branch hole 32 from the trunk hole 31 of the coolant supply passage 30 formed in the cutter body 11. Can be supplied. That is, the coolant can be accurately and stably supplied through the inside of the cutter main body 11 to the entire cutting edge 20 and the entire processing portion of the workpiece W on which the cutting edge 20 faces.

  Specifically, the branch hole 32 opened to the outer peripheral surface of the cutter body 11 is disposed to face the cutting edge 20, that is, the coolant sprayed from the branch hole 32 is cut by the cutting edge 20 and the cutting edge 20. It is directly applied to the part to be processed (processed surface) of the workpiece W to be processed. Therefore, the cutting edge 20 can be efficiently cooled and the chip discharge property is improved.

Further, for example, by appropriately setting the opening shape and the numerical aperture of the branch hole 32 in accordance with the total length (blade length) of the cutting edge 20 and the like, the coolant is applied to the entire cutting edge 20 and the entire processing portion of the work material W. Can be easily distributed.
Specifically, as described in the present embodiment, even when the cutting edge 20 is configured by the tip blades 18 of the plurality of cutting tips 15 arranged in a spiral manner on the outer peripheral surface of the cutter body 11. The coolant can be spread over all of the tip blades 18 (that is, the entire cutting blade 20). Thereby, since the cutting performance of the entire cutting edge 20 is stably maintained, the surface roughness of the processed surface of the work material W can be maintained with high accuracy.

  Further, since the coolant is supplied through the inside of the cutter body 11, it is not necessary to use a small space of the chamfering device around the sculpting cutter as in the prior art. Therefore, according to this embodiment, various facilities are provided. Even if it is an aspect, there can exist a stable effect.

  As described above, according to the present embodiment, the coolant can be supplied uniformly and stably to the cutting edge 20 and the work portion of the work material W, and the cutting edge 20 can be efficiently cooled. As a result, chip discharge can be improved, and highly accurate and highly efficient chamfering can be performed stably.

  Further, in the present embodiment, the cutter body 11 is provided with a plurality of branch holes 32 along the extending direction of the cutting edge 20, that is, the plurality of branch holes 32 are opened so as to face the single cutting edge 20. doing. Therefore, it becomes easy to supply the coolant evenly over the entire length of the cutting edge 20, and the above-described effects can be obtained more stably.

In the present embodiment, the nozzle 33 is provided at the opening of the branch hole 32, and the central axis C2 of the nozzle hole 33a of the nozzle 33 is inclined with respect to the central axis C1 of the branch hole 32. Has the effect of.
That is, as described above, the nozzle 33 is provided at the opening of the branch hole 32, so that the opening of the branch hole 32 (that is, the opening of the nozzle hole 33a) can be more reliably opposed to the cutting edge 20. Become. Specifically, in the present embodiment, the trunk hole 31 is located on the axis O inside the cutter body 11, and the central axis C <b> 1 of the branch hole 32 communicating with the trunk hole 31 is in the radial direction of the cutter body 11. Although extending along, it may be difficult for the opening of the branch hole 32 extending in the radial direction to face the cutting edge 20. Therefore, it is preferable that the branch hole 32 is inclined with respect to a portion other than the opening so as to face the cutting edge 20 (the direction of the branch hole 32 is changed at the opening portion and bent). It is easy to provide the nozzle 33 at the opening of the branch hole 32, and the effect is surely obtained. That is, it becomes easy to arrange the cutting edge 20 in the vicinity of the extension line of the central axis C2 of the nozzle hole 33a, and the above-described operational effects become particularly remarkable.

Specifically, in the present embodiment, in the cross sectional view of the sculpting cutter 10 shown in FIG. 3, the acute angle (oblique angle) among the acute angle and the obtuse angle formed between the central axes C1 and C2 is 30. ~ 60 °.
When the inclination angle is 30 ° or more, the opening of the nozzle hole 33a is prevented from being opposed to a portion located radially outside of the cutting edge 20. That is, it is possible to prevent the extension line of the central axis C2 of the nozzle hole 33a from passing through a position that is greatly spaced radially outward from the cutting edge 20, thereby reliably and accurately opening the opening of the nozzle hole 33a. 20 can be disposed to face each other.
Further, when the inclination angle is 60 ° or less, the pressure loss of the coolant flowing into the nozzle hole 33a from the branch hole 32 (the portion 32b other than the opening 32a) is suppressed, and the amount and speed of the coolant injected are reduced. The desired one can be maintained, and the coolant can be stably supplied to the cutting edge 20.
In addition, in order to make the above-mentioned effect more remarkable, the more preferable inclination angle is 40 to 50 °.

Moreover, in this embodiment, since the groove part extended along the extending direction of the cutting blade 20 is formed in the front end surface of the nozzle (cat's eye nozzle) 33, there exists the following effect.
That is, according to the above configuration, the coolant flowing in the nozzle 33 is guided by the groove portion on the tip end surface of the nozzle 33 and sprayed along the extending direction of the cutting edge 20. For this reason, coolant can be supplied to the cutting edge 20 in a wide range and evenly. Moreover, since the useless injection of coolant toward the part other than the cutting edge 20 is suppressed, the cooling efficiency is further improved.

  In addition, by appropriately setting the opening shape of the groove portion of the nozzle 33 in accordance with the blade length of the cutting blade 20 and the arrangement of the branch holes 32, the aspect ratio of the coolant sprayed from the nozzle 33 (how to spread the spray) is determined. Can be expected. Specifically, by appropriately setting the opening shape of the groove portion, the coolant injection angle projected on the virtual plane perpendicular to the groove width direction of the groove portion (that is, the virtual plane along the groove length direction), and the groove groove The coolant injection angle projected on a virtual plane perpendicular to the length direction (that is, a virtual plane along the groove width direction) can be expected.

Moreover, in this embodiment, since the nozzle 33 is accommodated in the opening (opening part 32a) of the branch hole 32, there exists the following effect.
That is, according to the above configuration, since the nozzle 33 is accommodated inside the opening of the branch hole 32, the nozzle 33 can be prevented from protruding toward the cutting edge 20. Specifically, for example, unlike the above-described configuration, when the nozzle 33 is provided so as to protrude from the opening of the branch hole 32, chips may be easily caught on the nozzle 33. May affect. On the other hand, according to the above-described configuration described in the present embodiment, since chips are not easily caught by the nozzle 33, the coolant injection from the nozzle 33 toward the cutting edge 20 and the work material W is stabilized without being hindered by the chips. Can be done.

  Further, since the nozzle 33 is accommodated in the opening of the branch hole 32, a large distance from the tip surface of the nozzle 33 to the cutting edge 20 can be secured. As a result, the coolant sprayed from the nozzle 33 is likely to be diffused over a wide range before reaching the cutting edge 20, and the above-described operational effects can be made even more remarkable.

Further, in the present embodiment, a plurality of cutting edges 20 are provided on the outer peripheral surface of the cutter body 11 at intervals in the circumferential direction, and are adjacent to each other in the circumferential direction as shown in FIGS. The branch holes 32 of the cutting blades 20 that open to face the cutting blades 20 may be arranged at different positions in the direction of the axis O. In this case, the following operational effects are obtained.
That is, for example, unlike the above configuration, when the branch holes 32 of the cutting blades 20 adjacent in the circumferential direction are arranged at the same position in the axis O direction, the branch holes 32 are arranged closer to each other in the circumferential direction. In some cases, the rigidity of the cutter body 11 tends to decrease at the same position. Therefore, by adopting the above configuration of the present embodiment, the branch holes 32 of the cutting edges 20 adjacent in the circumferential direction are reliably separated in the circumferential direction, and the rigidity of the cutter body 11 is ensured.

[Other configurations included in the present invention]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the configuration in which the trunk hole 31 is a through-hole penetrating the sculpting cutter 10 (the cutter main body 11 and the rotary shaft portion 12) in the axis O direction is not limited thereto. . That is, the trunk hole 31 does not have to be a through hole, and is, for example, a deep hole (stop hole) that extends from both end surfaces of the pair of rotating shaft portions 12 toward the center of the cutter body 11 (inside in the direction of the axis O). There may be. In this case, it is preferable that the coolant supply means of the chamfering device 1 is connected to each of the trunk holes 31 of the pair of rotating shaft portions 12.

  In the above-described embodiment, the branch hole 32 and the nozzle hole 33a extend so as to be positioned on a virtual plane perpendicular to the axis O, but the present invention is not limited to this. That is, the branch hole 32 and the nozzle hole 33a extend, for example, along the extending direction of the cutting edge 20 (so as to be slightly inclined with respect to the axis O) and open toward the cutting edge 20. May be.

  Further, for example, when the cutter body 11 has a short total length in the direction of the axis O, or when the groove length of the nozzle hole 33a opened at the tip end surface of the nozzle 33 can be sufficiently large, a single cutting blade 20 is formed. On the other hand, only one branch hole 32 may be open.

  When a plurality of branch holes 32 are formed on the cutting edge 20, a plug member such as a plug is screwed into the opening 32 a of a predetermined branch hole 32 of these branch holes 32 instead of the nozzle 33. Then, the branch holes 32 for injecting the coolant may be appropriately selected.

Further, instead of using a cat's eye nozzle as the nozzle 33, another form of nozzle may be used. In this case, as long as the coolant can be sprayed in a wide range along the extending direction of the cutting edge 20, in the reference example of the present invention, it is not necessary to provide the groove on the tip surface of the nozzle 33. Further, the central axes C1 and C2 may be arranged in parallel (including the same axis) without tilting the central axis C2 of the nozzle hole 33a of the nozzle 33 with respect to the central axis C1 of the branch hole 32.

In the above-described embodiment, the nozzle 33 is accommodated in the opening of the branch hole 32. However, the present invention is not limited to this. That is, the nozzle 33 may be provided so as to protrude from the opening toward the cutting edge 20 without being accommodated in the opening of the branch hole 32. In this case, it is possible to reduce the distance between the opening of the nozzle hole 33a and the cutting edge 20, and it becomes easier to supply the coolant to the intended position of the cutting edge 20 with higher accuracy.
Further, in the reference example of the present invention , the branch hole 32 may be opened directly toward the cutting edge 20 without providing the nozzle 33.

  In addition, in the range which does not deviate from the meaning of this invention, you may combine each structure (component) demonstrated by the above-mentioned embodiment, a modification, and a remark etc., addition of a structure, omission, substitution, others It can be changed. Further, the present invention is not limited by the above-described embodiments, and is limited only by the scope of the claims.

10 Scalping Cutter 11 Cutter Body 20 Cutting Blade 31 Trunk Hole 32 Branch Hole 33 Nozzle (Cat Eye Nozzle)
C1 Center axis of branch hole C2 Center axis of nozzle hole O Axis line T Cutter rotation direction

Claims (5)

A cylindrical cutter body rotated around an axis,
A cutting blade formed on the outer peripheral surface of the cutter body so as to be gradually twisted in the circumferential direction around the axial line as it goes in the axial direction;
A trunk hole extending in the axial direction inside the cutter body;
A branch hole that communicates with the trunk hole and opens on an outer peripheral surface of the cutter body;
The opening of the branch hole is disposed so as to be adjacent to the cutting edge in the circumferential direction with respect to the cutting edge, and faces the cutting edge .
A nozzle is provided at the opening of the branch hole,
A sculpting cutter characterized in that a groove portion extending along the extending direction of the cutting edge is formed on the tip surface of the nozzle . The sculpting cutter according to claim 1,
A sculpting cutter, wherein a plurality of the branch holes are provided along an extending direction of the cutting edge. A sculpting cutter according to claim 1 or 2,
A nozzle is provided at the opening of the branch hole,
A sculpting cutter, wherein a central axis of a nozzle hole of the nozzle is inclined with respect to a central axis of the branch hole. The sculpting cutter according to any one of claims 1 to 3 ,
A nozzle is provided at the opening of the branch hole,
The sculpting cutter, wherein the nozzle is accommodated in the opening. A sculpting cutter according to any one of claims 1 to 4 ,
A plurality of the cutting blades are provided on the outer peripheral surface of the cutter body at intervals in the circumferential direction,
A sculpting cutter characterized in that the branch holes of the cutting blades adjacent to each other in the circumferential direction are disposed at positions different from each other in the axial direction.

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