JPH0512058U - Rolling tool - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cutting tool capable of collecting chips produced during cutting without widely scattering them around the machine. [Structure] A cover 20 is provided outside the peripheral surface of an end mill 8 which is driven to rotate integrally with a main shaft 2 so as to cover the peripheral surface of the end mill 8 and to be rotatable relative to the end mill 8. To do. A chip discharge space 34 is formed between the inner peripheral surface of the cover 20 and the outer peripheral surface of the end mill 8, and a suction port that communicates the chip discharge space 34 with a chip suction device provided outside the cover 20. 32 is formed on the cover 20. Further, a notch 26 is formed at the tip side portion of the cover 20 so as to expose the tip side outer peripheral portion of the end mill 8 to the outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rolling tool for performing contour cutting using an end mill having a front cutting edge formed on an end face and a long outer peripheral cutting edge formed on the outer circumference.

[0002]

[Prior Art]

 An example of this type of rolling tool will be described with reference to FIGS. 6 and 7. The milling tool shown in these figures is constructed by attaching an arbor 6 to a main spindle 2 of a machine tool via a key 4 and fastening the end portion of an end mill 8 to the arbor 6 with bolts 10 and 10. There is. A plurality of front cutting edges 12 ... Are formed on the end surface of the end mill 8, and a plurality of long spiral cutting edges 14 are formed on the outer peripheral surface. Here, in the present specification, “long shape” refers to the cutting edge length of the outer peripheral cutting edge with respect to the diameter d of the end mill (the length corresponding to L in FIGS. 8A and 8B). Is more than doubled.

In the rolling tool having the above structure, while the end mill 8 is rotated around the axis together with the spindle 2, the end mill 8 is fed in a direction perpendicular to the axis to perform a cutting process such as a profiling of the work material C. It is carried out.

[0004]

[Problems to be solved by the device]

 In the conventional rolling tools as described above, the generated chips are scattered randomly around the work material and the machine, which results in a worse working environment and also a considerable amount of chip disposal after cutting. It had the drawback of taking time. Further, as the cutting continues, chips gradually accumulate on the work material and the table of the machine, etc., so that the heat of these chips causes thermal deformation of the work material and the machine, which deteriorates the machining accuracy. There is also a drawback that chips are caught in the cutting blades 12 and 14 and the quality of the cutting surface is impaired. Furthermore, the chips scattered around the machine may enter the sliding surface of the machine or the like, resulting in deterioration of the accuracy of the machine itself and shortening of its life.

The present invention has been made under such a background, and an object thereof is to provide a rolling tool capable of collecting chips generated by cutting without widely scattering them around the machine. And

[0006]

[Means for Solving the Problems]

 This invention is a rolling mill that performs cutting by sending an end mill that has a front cutting edge formed on the end face and a long outer peripheral cutting edge on the outer periphery while rotating it around the axis and sending it in the direction perpendicular to the axis. In the tool, a cover that covers at least the peripheral surface of the end mill is provided outside the peripheral surface of the end mill so as to be rotatable relative to the end mill, and the cover covers the inner peripheral surface of the cover and the end mill. A chip discharge space is formed between the chip and the outer peripheral surface, and a suction port that connects the chip discharge space and a chip suction machine provided outside the peripheral surface of the cover is formed in the cover. A notch for exposing the outer peripheral portion on the front end side of the end mill to the outside is formed in the portion.

[0007]

[Action]

 In the rolling tool having the above structure, while sucking the inside of the cover from the suction port with the chip suction machine, the end mill is connected in the direction perpendicular to the axis while connecting the end mill around the axis, and the end mill moves outward from the notch of the cover. The work material is cut by the exposed outer peripheral cutting edge formed on the outer peripheral part of the end mill and the front cutting edge. The chips mainly generated by the outer peripheral cutting edge are taken into the chip discharge space and then sucked and collected by the chip suction machine through the suction port.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. The same components as those of the conventional example described above are designated by the same reference numerals, and the description thereof will be omitted. In these drawings, reference numeral 16 is a radial bearing fitted in the arbor 6, and is axially locked by a retaining ring 18. A substantially funnel-shaped cover 20 that covers the outer circumference of the end mill 8 is fitted into the outer ring of the radial bearing 16, and the cover 20 is connected to the cap 22 and the bolt 24 so that the cover 20 is rotated by the arbor 6. It is supported.

The tip position of the cover 20 in the axial direction is substantially the same as the tip position of the end mill 8, and a substantially rectangular notch 26 is formed in the tip side portion of the cover 20. The width W of the notch 26 is formed to be slightly larger than the diameter d of the end mill 8, and the cutting depth h in the axial direction thereof is formed to be slightly larger than the cutting depth m of the end mill 8.

A circular cutout hole 28 is formed in a portion of the tip end side portion of the cover 20 substantially facing the cutout 26, and a pipe 30 is fitted into the cutout hole 28 to form an intake port 32. Has been formed.

A chip discharging space 34 is formed between the inner peripheral surface of the cover 20 and the outer peripheral surface of the end mill 8. The gap amount δ between the outer peripheral portion of the end mill 8 and the cover 20 forming the chip discharge space 34 is appropriately determined according to the material of the work material, cutting conditions, etc., but should be set within the range of 1 mm to 10 mm. Is desirable. If the gap amount δ is less than 1 mm, the chips caught in the upper part of the chip discharge space 32 may be accumulated and clogged on the upper part of the chip discharge space 34, and the end mill 8 and the cover 20 may be damaged. On the other hand, if the gap amount δ exceeds 10 mm, the chip suction force, which will be described later, is reduced and there is a risk that the chip disposal will be hindered. A portion of the chip discharge space 34 on the base end side is separated from the radial bearing 16 by a partition wall 36.

A tip end portion of a hose 38 connected to a chip suction machine (not shown) provided outside the peripheral surface of the cover 20 is fitted into the suction port 32, whereby a chip discharge space 34 and The chip suction device is in communication.

In the rolling tool configured as described above, while the air inside the cover 20 is sucked from the suction port 32 by the chip suction machine, the end mill 8 is rotated around the axis by the main shaft 2 and is perpendicular to the axis. In the same direction, the work material C is cut by the outer peripheral cutting edge 14 and the front cutting edge 12 of the end mill 8 exposed outward from the notch 26 of the cover 20.

Negative pressure is generated in the chip discharge space 34 because air is sucked from the hose 38, and the air taken in from the tip end opening of the cover 20 and the notch 26 is discharged into the chip discharge space 34. It is guided inside and taken into the chip suction machine from the suction port 32. Therefore, the chips produced by cutting the work material C mainly by the outer peripheral cutting edge 14 of the end mill 8 are introduced into the chip discharge space 34 and then guided from the suction port 32 to the chip suction machine where they are collected. It

Therefore, according to the rolling tool having the above-described configuration, the chips generated during cutting do not scatter around the tool regardless of the shape of the work material C, the working environment is improved, and the chip processing is required. The time required for cutting is shortened, and further, the deterioration of the mechanical accuracy due to the accumulation of chips and the deterioration of the quality of the work surface of the work material C are avoided. It has the excellent effect of being

1 and 4 show a state in which the side surface of the work material C is cut by sending a rolling tool in the direction of arrow A in FIG. 2 (direction of arrow B in FIG. 4), The arrow D in FIG. 4 indicates the rotation direction of the end mill 8. In the embodiments shown in these drawings, the cover 20 is not restrained by the hose 38 and is rotatable around the axis. Then, in a state where one end 26a of the notch 26 of the cover 20 is brought into contact with the surface of the work material C (surface E in FIG. 4), the end mill 8 is rotated in the direction described above and fed in the direction of arrow B. Then, the cover 20 is constantly urged in the direction of arrow F in FIG. 4 due to the rotational friction resistance of the radial bearing 16, and the contact between the surface E and the one end 26a of the notch 26 is continuously maintained during cutting. To be done. However, in order to perform the above cutting, the lateral width W of the notch 26 needs to be formed according to the cutting width n. Further, when the cutting width is constant in the entire cutting process, the cover 20 may be prevented from rotating.

Further, as a modified example of the above embodiment, the cover 20 in FIG. 1 may be shaped so as to cover the tip portion of the end mill 8 like the cover 40 in FIG. By forming the cover in such a shape, the sealing degree of the cover is enhanced, the negative pressure of the chip discharge space 34 is further increased, and the chip suction effect can be further enhanced.

Although a straight end mill is used as the end mill in the above embodiment, if the end mill has a front cutting edge formed on the end face and a long outer peripheral cutting edge formed on the outer circumference, a taper taper is provided. Of course, it may be an end mill.

Further, the end mill used in the present invention is not limited to the solid end mill in which the cutting edge is integrally molded, and it is a throw-away type end mill in which a throw-away tip having a cutting edge is detachably attached. It may be.

[0020]

[Effect of the device]

 As described above, according to the present invention, the end mill having the front cutting edge formed on the end face and the long outer circumferential cutting edge formed on the outer circumference is rotated about the axis while being perpendicular to the axis. In a rolling tool that feeds in the direction to perform cutting, a cover that covers at least the peripheral surface of the end mill is disposed outside the peripheral surface of the end mill so as to be rotatable relative to the end mill. A chip discharge space is formed between the inner peripheral surface and the outer peripheral surface of the end mill, and a suction port is formed in the cover to connect the chip discharge space and a chip suction machine provided outside the peripheral surface of the cover. However, since a notch is formed in the tip end side portion of the cover to expose the tip end side outer peripheral portion of the end mill to the outside, chips generated mainly by the outer peripheral cutting edge of the end mill are scattered around the machine. Ku can sequentially recovered, thereby reducing the chip processing time, improving the working environment, and further, it is possible to eliminate all such possible to prevent deterioration of the machine accuracy, the problems associated with the scattering of chips.

[Brief description of drawings]

FIG. 1 is an axial sectional view of a rolling tool according to an embodiment of the present invention.

FIG. 2 is a view from the direction of the arrow II in FIG.

FIG. 3 is a view from the direction of the arrow III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an axial sectional view of a rolling tool according to another embodiment of the present invention.

FIG. 6 is a side view of a conventional rolling tool.

FIG. 7 is a view from the direction I of the same rolling tool.

FIG. 8 is an explanatory diagram of an end mill.

[Explanation of symbols]

 8 End Mill 12 Front Cutting Edge 14 Peripheral Cutting Edge 20,40 Cover 26 Notch 34 Chip Discharge Space

Claims (1)

[Scope of utility model registration request] 1. A cutting method in which an end mill having a front cutting edge formed on an end face and a long outer peripheral cutting edge formed on the outer periphery is fed around in the direction perpendicular to the axis while rotating around the axis to perform cutting. In the tool, a cover covering at least the peripheral surface of the end mill is provided outside the peripheral surface of the end mill so as to be rotatable relative to the end mill, and an inner peripheral surface of the cover and an outer peripheral surface of the end mill. Forming a chip discharge space between the and the cover to form a suction port that communicates the chip discharge space and a chip suction machine provided on the outside of the peripheral surface of the cover, at the tip side portion of the cover, A rolling tool, wherein a notch is formed to expose an outer peripheral portion of the end mill on the tip side to the outside.