TWI574763B - Disposable blade of chamfer milling tool - Google Patents

Description

Chamfered cutter

The present invention relates to a processing blade; and more particularly to an innovative structural type of a discarding blade of a chamfering cutter.

According to the different types of processing, the milling cutter is divided into various types such as a cylindrical milling cutter, a face milling cutter, an end milling cutter, a keyway milling cutter, a discarded milling cutter, etc., wherein the discarded milling cutter is characterized by The lock is provided with a detachable blade, so that when the blade is worn, it is possible to replace only the blade without replacing the entire milling cutter; and if the blade of the discarded milling cutter is formed into a diamond shape, it becomes a reverse An angular function chamfering knife (referred to as a chamfering cutter according to the present invention), and the present invention is specifically directed to the blade structure of such a discarding milling cutter.

At present, the blade structure of the conventional chamfering cutter is designed such that the blade back of the blade is usually set to a convex curved surface shape, and the inclination angle of the convex curved surface is substantially the same as the inclination angle of the blade portion; however, this is checked. The conventional structure has found in practical application experience that after the blade is rotated through the workpiece during the milling process, since the inclination angle of the convex surface of the blade is substantially the same as the inclination angle of the blade edge of the blade, The convex arc surface of the back of the knife will cause a considerable area of friction between the workpiece after the blade is cut through the workpiece. As a result, the chamfering milling cutter is prone to obstruction, vibration and noise. Problems such as excessive size, high processing quality and high accuracy are not harmful.

Therefore, in view of the problems existing in the blade structure of the above-mentioned conventional chamfering cutter, how to develop an innovative structure that can be more ideal and practical is subject to the goal and direction of the relevant industry.

In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the inventor has finally obtained the practical invention.

The main object of the present invention is to provide a discarding blade for a chamfering milling cutter, and the technical problem to be solved is to develop a new type of milling cutter with a more practical and practical use. Think about innovative breakthroughs for your goals. The discarding blade is configured to be locked to a blade receiving groove at a bottom end of a chamfering milling cutter. The discarding blade has a diamond configuration, including a blade surface and a blade back, and the blade back has a quadrangular pyramid shape. There are four corner portions formed.

The technical feature of the present invention is mainly to provide a first cutting surface and a second cutting surface on opposite sides of each corner portion, and the first cutting surface and the second cutting surface are oppositely defined to form an oblique rib. a line, the oblique rib line exhibiting a skewed state away from the center axis of the blade back toward one end of the center of the blade, and the oblique direction thereof is in an opposite relationship to the direction of rotation of the discarding blade.

The main effects and advantages of the present invention are that the frictional area between the blade of the disposable blade and the workpiece during the cutting process of the blade can be significantly reduced, thereby greatly improving the smoothness and processing quality of the chamfering milling cutter. Accuracy, effectively reducing the practical progress of vibration and noise.

Please refer to Figures 1, 2, 3 and 4, which are preferred embodiments of the discarding blade of the chamfering cutter of the present invention, but the embodiments are for illustrative purposes only and are not applicable to patent applications. The discarding blade A is configured to be locked to a blade receiving groove 11 at the bottom end of a chamfering milling cutter 10; the discarding blade A has a diamond configuration, including a knife face 20 and a blade back 30, the blade back 30 is formed in a quadrangular pyramid shape and has four corner portions 31, wherein each of the corner portions 31 is provided with a first cutting surface 311 and a second cutting surface 312 on opposite sides thereof, and The first surface 311 and the second cutting surface 312 are oppositely defined to form an oblique rib line 40, and the oblique rib line 40 is offset from the blade end toward the center of the blade back 30 (as indicated by C in FIG. 4). 30 The central axis (as indicated by the arrow L1 in Fig. 4) is inclined, and its oblique direction is opposite to the rotation direction of the discarding blade A (as indicated by the arrow L2 in Fig. 4). For the opposite configuration relationship.

The angle of inclination of the first section 311 and the second section 312 is smaller than the angle of inclination of the oblique rib line 40; the specific embodiment of the pattern in this example is shown in FIG. 3, wherein the oblique direction The rib line 40 may have an angle of camber of 44 degrees (as indicated by X1), and the angle of inclination of the first section 311 and the second section 312 is between 41 and 43 degrees (as indicated by X2, the first section is indicated) The angle of the face 311 is inclined).

With the above-mentioned structural composition, the discarding blade A of the chamfering cutter 10 of the present invention is mainly characterized in that the corner portion 31 is provided with a first cutting surface 311 and a second cutting surface 312 on two sides, and the first The oblique rib line 40 is oppositely defined between the cut surface 311 and the second cut surface 312, and the oblique rib line 40 is offset from the center of the blade back 30 (as indicated by C in FIG. 4). (as shown by arrow L1 in Fig. 4), the tilting direction is opposite to the direction of rotation of the discarding blade A (as indicated by arrow L2 in Fig. 4). And other innovative technical features; thereby, as shown in FIG. 5, when the discarding blade A rotates with the chamfering cutter 10 (as indicated by arrow L3), the discarding blade is used. The portion of the blade back 30 of A and the blade edge formed by the two sides of the blade face 20 are the same or close to the portion of the oblique rib line 40, that is, during the rotary milling process of the discarding blade A, The portion of the back of the blade 30 that may be in frictional contact with the workpiece, only the portion of the oblique rib line 40 that is in line contact is left. The first cutting surface 311 and the second cutting surface 312 on the two sides of the rib line 40 are in a relatively inwardly contracted shape, so that they do not contact the workpiece, thereby greatly reducing the blade back 30 of the disposable blade A to the blade portion. The friction area between the workpiece and the workpiece during the rotary cutting process has the proper support and effect of the blade back 30 structure.

The advantages of the present invention are as follows: The discarding blade of the chamfering cutter is mainly provided with a first cutting surface and a second cutting surface on opposite sides of the corner portion, so as to define a diagonal direction. a rib line, the oblique rib line exhibiting a skewed state away from the center axis of the blade back toward one end of the center of the blade, and the oblique direction is an opposite relationship with the rotation direction of the discarding blade. State and technical features, according to the conventional structure proposed in the prior art, the arrangement of the diagonal ribs enables the frictional area between the blade back of the disposable blade and the workpiece to be linear. , 俾 can significantly reduce the friction area between the blade of the disposable blade and the workpiece during the rotary cutting process (with appropriate support and effect of the blade back structure), thereby achieving a smooth increase in the milling state of the chamfering cutter Sex, processing quality and precision, effectively reducing the practical progress of vibration and noise.

The above embodiments are intended to be illustrative of the present invention, and are not to be construed as limiting the scope of the invention. The principles are changed and modified to achieve an equivalent purpose, and such changes and modifications are to be included in the scope defined by the scope of the patent application as described later.

A‧‧‧Disposable inserts 10‧‧‧Chamfer-type milling cutters 11‧‧‧ Blade receiving slots 20‧‧‧Knife 30‧‧‧Knife back 31‧‧‧ Corner part 311‧‧‧ First section 312 ‧‧‧Second section 40‧‧‧ diagonal rib line

Fig. 1 is a perspective view showing the corresponding relationship between the discarding blade of the present invention and the chamfering cutter. Figure 2 is a perspective view of the rear perspective of the disposable blade of the present invention. Figure 3 is a plan side view of the disposable blade of the present invention. Figure 4 is a plan rear view of the disposable blade of the present invention. Fig. 5 is an explanatory view showing the state of operation of the disposable blade of the present invention.

A‧‧‧ discarding blade

20‧‧‧ knife face

30‧‧‧ knife back

31‧‧‧ corner parts

311‧‧‧ first section

312‧‧‧Second section

40‧‧‧ oblique rib line

Claims (3)

A discarding blade for a chamfering cutter for locking a blade receiving groove provided at a bottom end of a chamfering milling cutter; the discarding blade is in a diamond configuration, including a blade face and a blade back, the blade back has a quadrangular pyramid shape and is formed with four corner portions, wherein each of the corner portions is provided with a first cutting surface and a second cutting surface adjacent to the two sides, and the first cutting surface and the first cutting surface The second tangential surface is oppositely defined to form an oblique rib line, and the oblique rib line presents a tilting state away from the center axis of the blade back toward one end of the center of the blade, and the oblique direction thereof is rotated with the discarding blade The knife directions are opposite to each other. The discarding blade of the chamfering cutter according to claim 1, wherein the angle of inclination of the surface of the first section and the second section is smaller than the angle of inclination of the oblique rib line. The discarding blade of the chamfering cutter according to claim 1, wherein the oblique rib line camber angle is 44 degrees, and the inclined angle of the first section and the second section is 41 Between 43 degrees.