JP2529701Y2 - Face milling cutter - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a cutter for performing cutting while sucking and collecting chips, particularly a cutter used for face milling of an ingot of an aluminum material, for example, pure aluminum or an aluminum alloy. .

[Conventional technology]

In face milling of an aluminum ingot, since the amount of chips becomes enormous, a method of collecting chips generated by using a suction device provided with a hood that covers the periphery of the cutter while preventing scattering of the chips is adopted.

In the conventional face milling cutter used for such processing, the chip pocket 5 'is formed in a large arc shape as shown in FIG. 5 based on the same design concept as other face milling cutters.

[Problems to be solved by the invention]

Face milling of aluminum ingots is almost 100% because the work material is automatically conveyed and is close to unmanned operation.
Nearly% chip recovery is required.

However, the chips generated when the chip pockets have an arc shape flow out in the outer circumferential direction of the cutter along the arc surface, while the hood of the suction device is provided with a suction port on the upper outer periphery so as not to hinder the work. Therefore, the suction force does not sufficiently act on the chips that have flowed out.

For this reason, in the conventional cutter, there has been a situation in which chips that have not been suctioned well cling to the cutting edge and hinder processing.

[Means for solving the problem]

In order to solve the above-described problem, the present invention covers the outer periphery of the main body with a suction hood, and in a front milling cutter that advances processing while sucking generated chips upward, a chip pocket provided corresponding to the cutting blade, Make a pocket with a through groove from the tip of the body to the back. The chip pocket of this through groove is shown in, for example, Japanese Utility Model Laid-Open No. 2-82414,
The chip pocket disclosed in this publication is formed of a straight surface, and the depth thereof gradually decreases toward the front in the rotation direction of the cutter, so that the chips can flow more easily to the outer periphery of the cutter than the chip pocket having an arcuate surface.

Therefore, in the present invention, the chip pocket of the through groove is provided with a flat bottom wall, and furthermore, it stands substantially in the radial direction of the cutter from the front edge of the bottom wall in the cutter rotation direction to reach the outer periphery of the main body, and A flat guide wall extending in the axial direction and reaching the rear surface of the main body is provided at a position facing the cutting blade.

[Action]

The generated chips hit the guide wall provided in the pocket in the present invention, and are guided by the wall to forcibly turn upward in the axial direction.

The guide wall is a flat wall that rises from the front side edge of the flat bottom wall in the cutter rotation direction to the cutter radial direction and extends to the outer circumference of the main body, so that the chip outflow direction is changed compared to the conventional guide wall that rises in an arc. The action and the axial guiding action after the change work strongly. For this reason, soft chips such as aluminum do not flow out of the cutter in the outer peripheral direction. If the chips flow out in the outer circumferential direction of the cutter, the chips cannot be captured by the suction force. However, as described above, the chips that are going to flow upward ride on the airflow flowing in the pocket and are pulled upward to suck the hood. As it goes to the mouth, collection is ensured.

〔Example〕

One embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows a part of the front of the cutter, and FIG. 2 shows a part of the side. In the drawing, 1 is a cutter body, 2 is a locator attached to a seat groove on the outer periphery of the body, 3 is a cutting blade tip supported by the locator, 4 is pulled in with a W screw (not shown) and pressed into between the tip and the body. The presser foot 5 for chip clamp is a chip pocket of a through groove provided on the outer periphery of the main body corresponding to the chip.

The chip pocket 5 is cut out from the front to the back of the main body 1 as shown in the figure. In this pocket, a guide wall 5a, which is a plane that stands substantially in the radial direction of the cutter, and a bottom wall 5b that intersects the guide wall 5a at right angles, are provided parallel to the cutter axis. The guide wall 5a is located at a position following the edge of the bottom wall 5b on the front side in the cutter rotation direction, and faces the cutting blade. Therefore, the generated chips collide with the guide wall 5a and are forcibly turned.

3 and 4 show the use state of the exemplary cutter. In the drawing, reference numeral 10 denotes a front milling cutter of the present invention, 11 denotes a main shaft of a milling machine, and 12 denotes a hood of a suction device which covers the outer periphery of the cutter. The hood 12 has a suction port 12a shown in FIG.

In this manner, when the outer periphery of the cutter 10 is covered with the hood 12 and cutting is performed while suctioning the inside of the hood, the generated chips A
The direction of the outflow is changed upward by the guide wall 5a of the chip pocket, and flows into the suction port 12a as shown in the figure, riding on the airflow generated in the hood in the same direction.

The cutting blade is provided with a positive axial rake as shown in FIG. 2 in order to change the chip outflow direction upward by the guide wall 5a extending in the axial direction.

〔effect〕

As described above, in the present invention, the chip pocket of the through groove is provided with a flat guide wall facing the cutting blade and changing the outflow direction of the chip toward the rear side of the cutter. As a result, the effect of increasing the recovery rate can be obtained. For example, in a recovery experiment in a face milling operation of an aluminum ingot, it was confirmed that the requirement of a chip recovery rate of 99.99% or more could be sufficiently satisfied.

[Brief description of the drawings]

FIG. 1 is a front view showing an essential part of an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a side view of a cutter in use, FIG. 4 is a side view thereof, and FIG. FIG. 4 is a front view showing a chip pocket shape of a conventional cutter. 1 ... cutter body, 2 ... locator, 3 ... cutting blade tip, 4 ... presser foot, 5 ... chip pocket, 5a ... guide wall, 5b ... bottom wall, 10 ... front milling cutter.

Claims (1)

(57) [Scope of request for utility model registration] A chip pocket provided in correspondence with a cutting edge in a front milling cutter in which the outer periphery of a main body is covered with a suction hood and processing is performed while suctioning chips generated by a cutting edge having a positive axial rake upward. However, it is a pocket of a through groove extending from the front end of the main body to the back surface and has a flat bottom wall, and furthermore, stands substantially in the cutter radial direction from an edge of the bottom wall on the front side in the cutter rotation direction to reach the outer periphery of the main body. A front milling cutter characterized in that a flat guide wall extending in the axial direction and reaching the rear surface of the main body is provided at a position facing the cutting blade.