WO2007023571A1

WO2007023571A1 - Cover for face mill

Info

Publication number: WO2007023571A1
Application number: PCT/JP2005/015836
Authority: WO
Inventors: Shinji Shimohiro; Tadashi Umeda
Original assignee: Kanefusa Kabushiki Kaisha
Priority date: 2005-08-24
Filing date: 2005-08-24
Publication date: 2007-03-01
Also published as: TW200711768A

Abstract

A cover (31) for a face mill, comprising a side cover part (32) fitted to a housing (11) at an interval from the outer periphery of the face mill (21) and bottom cover plates (41, 42) fitted to the side cover part (32) on the bottom side of the face mill (21) and covering the bottom side of the face mill while leaving only a portion necessary for a cut material to pass therethrough in machining. Recessed parts (43, 44) are formed in the surfaces of the bottom cover plates (41, 42) facing the face mill so that a cutting blade (25) does not interfere with these surfaces during machining. A part of the cutting blade comes within the recessed parts (43, 44) of the bottom cover plates (41, 42). The boundaries of the recessed parts (43, 44) are formed in sloped faces (43a, 44a) tilted to expand toward the face mill (21).

Description

Memo book Power mill for face mill Technical field

The present invention relates to a face mill cover for efficiently sucking chips generated by cutting using a face mill, and a high cutting speed at which a strong centrifugal force acts on the chips immediately after being cut. Suitable for wood processing such as processing wood, wood-based material, resin, etc., and processing similar to wood processing, and also used for cutting light metals such as aluminum materials and light alloys at high cutting speeds. This is related to the face mill cover. Background art

Conventionally, this type of face mill cover is, for example, actual open-air 2-8

As shown in Japanese Patent No. 2 4 15, one applied to a cylindrical holder for a face mill arranged on the outer circumference side of the face mill with a gap between the circumference is known. This holder is provided with a cylindrical force bar that has a gap between the outer periphery of the face mill and the cylindrical force bar rotates together with the milling machine during milling. During cutting, the cylindrical force bar is attached to the inner peripheral surface by centrifugal force so that the cutting waste is not scattered widely. In addition, although a face mill is also called a face mill, in this specification, the name of a face mill is used.

However, there is no cover on the bottom side of the above conventional face mill, and when machining a work material whose width is smaller than the diameter of the face mill, a wide opening that cannot be covered with a force pad is formed on the bottom side. Arise. If the opening is wide, the wind speed of suction at the opening will be reduced entirely or partially, and it will not be possible to suck the chips sufficiently. Therefore, chips that cannot be sucked up are scattered from the wide opening on the bottom side, and part of the chips are likely to get on the machined surface after cutting the work material. Therefore, the product quality of the work material may be adversely affected.

The present invention is intended to solve the above-mentioned problem, and suppresses the scattering of the chips generated by the cutting process using the face mill to improve the suction efficiency of the chips and improve the product quality of the work material. The purpose is to provide a force bar for face mills that does not adversely affect the operation.

Disclosure of the invention

In order to achieve the above-mentioned object, the feature of the present invention is generated by processing when a work material is processed by a cutting blade provided on the bottom face of a face mill attached to the shaft end of the rotating shaft of the cutting device. A cover that covers the face mill and connects to the suction duct, leaving the required points to prevent chips from being scattered, and is attached to the eight-axis of the rotating shaft of the cutting device and has a gap between it and the outer periphery of the face mill. A part of the side cover that is placed at a distance from the bottom of the face mill, and the bottom part of the face mill that is attached to the side force bar on the bottom side of the face mill, leaving only the part that is necessary for the work material to pass during machining. This is because a bottom force par plate is provided.

In the present invention configured as described above, since the suction air speed at the opening necessary for suctioning chips can be maintained without unnecessarily widening the opening on the bottom surface side, the axis of the rotating shaft of the cutting device can be maintained. When machining the work material with the cutting blade provided on the bottom of the face mill attached to the end, scattering of chips generated by the machining from the opening on the bottom side is suppressed, and the efficiency is improved by the suction duct 卜. Can suck well. Therefore, it is possible to efficiently collect the chips generated by cutting the work material, and it is possible to suppress the deterioration of the product quality given to the work material by the chips that cannot be sucked. In addition, a recess can be provided on the face of the bottom cover plate facing the face mill so that the cutting blade of the face mill does not interfere during processing, so that at least a part of the cutting blade can enter the recess. As a result, the chips cut by the cutting blade of the face mill and blown horizontally by centrifugal force collide with the peripheral wall of the recess provided on the face of the bottom cover plate facing the face mill and jump into the air in the cover. Raised. For this reason, the chips are easily flown into the air flow during suction by the suction duct, and the chips are smoothly guided toward the duct and are sucked in efficiently <that is, they accumulate on the bottom cover plate, It is possible to suppress contact with and adhere to the surface of the work material, and to prevent deterioration of the work material quality due to chips. In particular, when the work material is a material that is easy to stick to the machined surface due to static electricity, such as when the work material is resin, the effect of preventing deterioration of the work material quality is significant.

In addition, the bottom cover plate is integrated from the side cover part to the face mill side to the position where the cutting blade does not interfere during processing, and is overlapped with the bottom face of the flange part and further from the inner edge of the flange part The inwardly extending flannel portion may be formed by a flat plate portion that is a separate body, and the recess may be formed by the inner edge of the flange portion and the flat plate portion. In this way, by constructing the bottom force force plate with the flange portion and a separate flat plate portion, it is possible to easily provide the concave portion without the trouble of scraping the bottom plate to form the concave portion. In addition, the strength of the bottom cover plate can be increased by overlapping the flange portion and the flat plate portion. In addition, a linear protrusion protruding toward the face is provided on the face of the bottom cover plate facing the face mill, and the inside surrounded by the protrusion is a recess that prevents the face mill cutting blade from interfering during processing. And a part of the cutting blade can enter the recess. Thus, by forming the recess surrounded by the projection provided on the flat plate, the recess formed by the projection is cut by the face mill cutting blade as described above. The swarf is blown up into the air inside the cover, and is blown by the air flow during suction, leading to the suction duct よく efficiently.

In addition, it is preferable that the peripheral wall portion of the concave portion has an inclined surface that is inclined so that the upper side spreads toward the face mill. The inclination angle of the inclined surface is 10 to 50. It is desirable to be in the range. As a result, the chips introduced to the recesses are more smoothly sputtered up into the air along the inclined surface, thereby promoting efficient collection of the chips. In particular, even resin chips that are prone to generate static electricity can be sucked up efficiently before adhering to the work material because they can be smoothly lifted into the air by the inclined surface, resulting in deterioration of the work material quality due to the chips. Can be effectively prevented. In addition, the same effect can be obtained by cutting a laminated work material or a laminated work material whose adhesive is somewhat uncured. Brief Description of Drawings

FIG. 1 is a front view showing a face mill mounting portion of a cutting apparatus equipped with a face mill cover according to a first embodiment of the present invention. FIG. 2 is a right side view showing a face mill mounting portion of the cutting apparatus. FIG. 3 is a partially broken sectional view in the direction of the line I I I I I I I of FIG. 1 showing the face mill mounting portion of the cutting apparatus. FIG. 4 is a bottom view showing the face mill mounting portion of the cutting apparatus. FIG. 5 is a cross-sectional view taken along the line V-V of FIG. 4 showing the face mill mounting portion of the cutting apparatus. FIG. 6 is an enlarged cross-sectional view of the main part of FIG. Fig. 7 shows the V I of Fig. 4 showing the face mill mounting part of the cutting machine.

I is a cross-sectional view in the direction of V I I. FIG. 8 is a cross-sectional view taken along the line V I I I and V I I I in FIG. 1 showing the face mill mounting portion of the cutting apparatus. First

FIG. 9 is a front sectional view showing a face mill mounting portion of a cutting apparatus mounted with a cover according to a second embodiment. FIG. 10 shows a cover according to a third embodiment. It is front sectional drawing which shows the face mill mounting part of the cutting device which mounted | wore. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figures 1 to 4 are front view, right side view, and partly broken sectional view in the III-III direction of the face mill mounting part of the cutting equipment using the face mill cover according to the first embodiment. And a bottom view. Figures 5 to 8 show the face mill mounting part of the cutting device in the V-V direction cross-sectional view, the main part enlarged cross-sectional view, the VII-VII line cross-sectional view, and the VIII-VIII line direction. It is shown by a cross-sectional view. Note that the left and right and up and down directions of the face mill mounting part of the cutting device shall be aligned with the left and right and up and down directions of Figs. 1 and 5.

The face mill mounting portion 10 of the cutting device is provided with a cylindrical housing 1 1 having a shaft hole 12, and the inner wall of the shaft hole 1 2 is coaxial in the axial direction at the lower end side of the housing 1 1. It has an extended protruding end 1 3. The shaft hole 12 is a small-diameter small-diameter hole 1 3 a at the protruding end portion 1 3, and a stepped portion 14 is formed at the boundary with the protruding end portion 1 3. In the shaft hole 12, an annular bearing 15 is fitted on the inner peripheral surface in a crimped state on the peripheral wall, and is attached in contact with the stepped portion 14. The inner diameter of the bearing 15 is slightly smaller than the inner diameter of the protruding end 13, so the boundary between the inner peripheral surface of the bearing 15 and the inner peripheral surface of the protruding end 13 is a step. It has become.

A rotating shaft 16 is inserted into the shaft hole 1 2. The rotary shaft 16 has a large-diameter portion 17 whose one end side in the axial direction (the lower end side in the figure) is slightly enlarged, and further downward from the shaft end surface 17a of the large-diameter portion 17 A small-diameter mounting shaft 1 8 that protrudes coaxially is provided. The large diameter portion 17 has a length approximately twice that of the protruding end portion 13, the outer diameter is substantially the same as the inner diameter of the protruding end portion 13, and the upper end is stepped. The difference is 1 7 b. The outer diameter of the mounting shaft portion 18 is about 13 times the outer diameter of the large diameter portion 17. The large-diameter portion 17 is passed through the protruding end portion 13 in a substantially close contact state and is positioned by contacting the bearing 15 at the stepped portion 17 b, and the lower end in the axial direction protrudes from the shaft hole 12. ing.

A face mill 2 1 is attached to the mounting shaft portion 1 8. The face mill 2 1 has a substrate portion 2 2 which is a steel disk-shaped thick plate, and is provided with a boss 2 3 which bulges coaxially from the upper surface of the base plate portion 2 2. A shaft hole 2 la penetrating vertically at the position is provided. The boss 2 3 has an outer diameter that is about half that of the substrate part 2 2, and the thickness is the same as that of the base part 2 2. The face mill 21 is equal in thickness to the length of the mounting shaft portion 18, and the inner diameter of the shaft hole 21 a is the same as the outer diameter of the mounting shaft portion 18. The face mill 21 is provided with mounting seats 24 at eight circumferentially equidistant positions near the outer periphery on the back side, and the cutting blade 25 protrudes slightly downward on the mounting seat 24. Is fixed. The face mill 2 1 is inserted into the mounting shaft 18 from the boss 2 3 side through the shaft hole 2 1 a, and the boss 2 3 comes into contact with the shaft end surface 17 a of the large diameter portion 17 It is fixed to the large-diameter portion 17 by tightening a bolt (not shown). A cover 3 1 is attached to the lower end surface 1 1 a of the housing 1 1. The cover 3 1 has a container shape with an open bottom, and includes a side cover portion 3 2 and bottom cover plates 4 1 and 4 2. The side cover part 3 2 is provided with a cylindrical cylindrical wall part 3 3 and an upper plate part 3 4 that is integrally covered on the upper end side of the side cover part 3 2. The cylindrical wall portion 3 3 has a diameter large enough to cover the outer periphery of the face mill 21, and one cylindrical circumferential portion of the cylindrical wall portion 3 3 (the right side portion in FIGS. 1 and 5) has a diameter. The suction part 3 6 swells outward in the direction. The upper plate portion 3 4 is provided with a central hole 3 4 a having an inner diameter slightly larger than the outer diameter of the large diameter portion 17 at the center, and through the mounting holes 3 4 b provided around the central hole 3 4 a. The mounting hole 1 1 b provided on the lower end surface 1 1 a of the housing 1 1 It is fixed by 3-5.

As shown in FIGS. 1 to 4, the suction part 36 includes a side plate 3 7 swelled in a substantially parabolic shape in a plan view from the right side wall portion of the cylindrical wall part 3 3, and a cylindrical wall part. 3 3 Surrounded by an inclined plate 3 8 extended at an angle of 45 degrees from the lower end of 3 3 and further extended upward from the upper end of the upper plate 3 4 and the upper end of the side plate 3 7 and the inclined plate 3 8 A cylindrical convex portion 3 9 is provided. The cylindrical convex portion 39 has a lower cylindrical portion 39a that slightly protrudes upward, and a cylindrical mounting tube protruding further upward on the upper surface 39b of the lower cylindrical portion 39a. Since part 39c is erected and is connected to a suction duct (not shown) at mounting cylinder 39c, the air in the cover 31 can be sucked by the suction duct. It has become. In this state, the face mill 2 1 is located in the side cover part 3 2, the mounting seat 2 4 is aligned with the lower end of the cylindrical wall part 3 3, and the cutting blade 2 5 is connected to the side cover part 3 3. 2 is slightly protruding downward from the lower end.

On the left and right sides of the lower end of the cylindrical wall portion 3 3, as shown in FIG. 4, two flat bottom cover plates 4 1, 4 2 have a predetermined distance through which the work material can pass. And is attached to the cylindrical wall 3 3. The left bottom cover plate 4 1 has a circular arc plate shape, and the right bottom cover plate 4 2 has a substantially trapezoidal plate shape, and has mounting pieces 4 1 a and 4 2 a at two locations on the outer circumference. ing. The predetermined interval through which the work material can pass is substantially equal to the width of the bottom cover plates 4 1 and 4 2. As shown in Figs. 5 and 8, on the upper surface of the bottom cover plates 4 1 and 4 2 facing the face mill 2 1, as shown in Figs. Arc-shaped recesses 4 3 and 4 4 having a predetermined radial width and a depth of about 12 of the plate thickness are provided. The radially inner and outer peripheral walls of the recesses 4 3 and 44 have an average of 10 to 65 °, preferably 20 to 50 ° with respect to the vertical direction so that the upper side of the recesses 4 3 and 4 4 extends toward the facing face mill 21. The inclined surfaces 4 3 a and 4 4 a are inclined in the range. Inclined surface 4 3 a, 4 4 a is not limited to a straight line in cross-sectional view. For the recesses 4 3 and 4 4, the entire inner side of the outer peripheral wall can be formed as a recess without providing the inner peripheral wall.

In the first embodiment having the above-described configuration, when the workpiece is machined by the cutting blade 25 provided on the bottom surface of the face mill 21 attached to the rotary shaft 16, the workpiece is cut by the cutting blade 25. Chips blown horizontally by centrifugal force are inclined surfaces 4 3 a, 4 4 a of recesses 4 3, 4 4 provided on the surface of the bottom force bar plates 4 1, 4 2 facing the face mill 2 1. The air is smoothly bounced up in the air along the slope, and is easily guided by the air current during suction by the suction duct, and is smoothly guided to the suction duct 卜 through the suction part 36.

As a result, in the first embodiment, the chips from the machined work material are splashed up into the air by the cover 31, which facilitates the smooth collection of the chips by the suction duct. In particular, resin chips that generate static electricity are guided to the inclined surfaces 4 3 a and 4 4 a and are smoothly levitated into the air, so they are efficiently sucked before adhering to the work material. . Therefore, it is possible to effectively prevent deterioration of the quality of the work material due to the adhesion of chips. In addition, the same effect can be obtained by cutting a laminated work material or a laminated work material whose adhesive is somewhat uncured.

Next, a second embodiment will be described.

In the second embodiment, instead of providing recesses 4 3 and 4 4 along the trajectory of the cutting blade 25 in the bottom cover plates 4 1 and 4 2 as in the first embodiment, FIG. As shown, arc-shaped protrusions 5 3 projecting from the surfaces of the flat bottom cover plates 5 1 and 5 2 at positions corresponding to the outer inclined surfaces 4 3 a and 4 4 a of the recesses 4 3 and 4 4. , 5 4 are provided. The planar shape of the bottom cover plates 5 1 and 5 2 is the same as that of the bottom cover plates 4 1 and 4 2. The inside surrounded by the protrusions 5 3 and 5 4 is a relatively recessed portion, and the recessed portion The cutting blade 2 5 of the face mill 2 1 protrudes. In addition, the inner peripheral side of the protrusions 5 3 and 5 4 is preferably 10 to 65 ° on the average with respect to the vertical direction so that the upper side expands toward the face mill 21, similarly to the inclined surface provided in the recess. Are inclined surfaces 5 3 a and 5 4 a inclined in the range of 20 ° to 50 °. The inclined surfaces 5 3 a and 5 4 a are not limited to straight lines in cross-sectional view. The inclined surfaces 5 3 a and 5 4 a are inclined in the range of 10 to 50 °. As a result, in the second embodiment as well, the chips introduced to the protrusions 5 3 and 5 4 are smooth along the inclined surfaces 5 3 a and 5 4 a in the same manner as the recesses in the first embodiment. Therefore, efficient collection of chips is promoted.

Next, a third embodiment will be described.

In the third embodiment, the bottom cover plate provided at the lower end of the cylindrical wall portion 33 is replaced with a single bottom plate cover as in the first and second embodiments. As shown in Fig. 10, the bottom cover plates 6 1 and 6 2 are cylindrical wall portions 3 3 and the flange portion 6 that extends integrally from the lower end to the position where the cutting blade 2 5 does not interfere during machining in the axial direction 6 3 and 6 4, and flange portions 6 3 and 6 4 superimposed on the flange portions 6 3 and 6 4, are composed of separate flat plate members 6 5 and 6 6.

The flange parts 6 3, 6 4 are substantially arc-shaped and trapezoidal-shaped, and the inner flanges facing each other are cut out in an arc shape, and the inner peripheral wall expands upward toward the face mill 2 1. In addition, the inclined surfaces 6 3 a and 6 4 a are inclined in an average range of 10 to 65 °, preferably 20 to 50 ° with respect to the vertical direction. The inclined surfaces 6 3 a and 6 4 a are not limited to straight lines in the cross-sectional view. The flat plate members 6 5 and 6 6 are thin plates that have the same shape as the bottom cover plates 4 1 and 4 2 and are not provided with the recesses 4 3 and 4 4. The recesses 6 1 a and 6 2 a of the bottom cover plates 6 1 and 6 2 are formed by the inner edges of the flange parts 6 3 and 6 4 and the flat plate members 6 5 and 6 6, and the inner edges of the flange parts 6 3 and 6 4 Inclined surface of 6 3 a, 6 4 a Becomes the inclined surfaces of the recesses 6 1 a and 6 2 a. In the third embodiment, the bottom force bar plates 6 1 and 6 2 have the same effects as the bottom cover plates of the first and second embodiments and form recesses in the flat plate members 6 5 and 6 6. There is no need for the strength of the member.

In the first to third embodiments, the bottom cover plate is preferably made of a transparent resin. The positional relationship between the cutting blade and the recess can be confirmed, and even if the cutting blade contacts the bottom cover plate, The cutting edge is difficult to chip. Further, the shape of the concave portion provided on the bottom cover plate is not limited to an arc shape, and may be any shape, such as a polygon, an ellipse, and the like as long as the object of the present invention can be achieved. In addition, the number of bottom plate covers is not limited to two, but may be one or three or more. <, .The distance can be adjusted by increasing or decreasing the bottom cover plate according to the width of the work material. In addition, it is possible not to provide an inclined surface on the inner and outer peripheral walls of the recess of the bottom cover plate if necessary. In addition, the bottom cover plate can be made not to have a recess if necessary. In addition, the force shown in the first to third embodiments is merely an example, and various modifications can be made without departing from the spirit of the present invention. Industrial applicability

The force bar for a face mill according to the present invention is capable of cutting a mill mill by a recess provided on a face of the bottom cover plate facing the face mill when a workpiece is processed by a cutting blade provided on the bottom face of the face. Since the chips cut by the blade are quickly picked up in the air and jumped up into the air in the cover, the chips are easily flowed into the air current when sucked by the suction device, so it is sucked smoothly Useful as it is guided towards the duct and is sucked for efficiency.

Claims

The scope of the claims

1. When machining the workpiece with the cutting blade provided on the bottom of the face attached to the rotating shaft of the cutting machine, the necessary points are set to prevent the scattering of chips generated by the machining. A side cover that covers the face mill and is connected to a suction duct 、, and is attached to the housing of the cutting device and arranged with a gap between the outer periphery of the face mill; Provided with a bottom cover plate that is attached to a part of the side force bar on the bottom side of the face mill and that covers only the part necessary for the work material to pass during machining, covering the bottom side of the face mill. Cover for face mill

2. A concave portion is provided on a surface of the bottom cover plate facing the face mill so that the cutting blade of the face mill does not interfere during processing, and a part of the cutting blade can enter the concave portion. A cover for a face mill according to claim 1.

3. The bottom surface cover plate is integrated with the side surface cover portion to the face mill side and extends to a position where the cutting blade does not interfere during processing, and is overlapped with the bottom surface of the flange portion so as to overlap the flange portion inner edge. The flange portion extending further inward is constituted by a flat plate portion that is separate from the flange portion, and the concave portion is formed by the inner edge of the flange portion and the flat plate portion. Cover for the face mill of ® in the range 2nd term.

4. A linear protrusion protruding toward the face mill is provided on the surface of the bottom cover plate facing the face mill, and the inner side surrounded by the protrusion is during machining of the cutting blade of the face mill. The cap for a mill according to claim 1, wherein the cap is formed in a recess that does not interfere, and a part of the cutting blade can be inserted into the recess.

5. Any one of claims 2 to 4, wherein the peripheral wall portion of the concave portion is an inclined surface that is inclined so that the upper side is widened toward the face mill. Cover for face mill as described in 1.