TWM604679U - Milling tool - Google Patents

Abstract

A milling cutter includes a shank segment and a blade segment that are integrally connected. The blade segment includes at least one rotating blade portion and at least one straight blade portion arranged at intervals around a rotation axis extending up and down. The at least one turning edge portion has a plurality of turning knife edges arranged at intervals up and down and spirally extending around the rotation axis, and the at least straight edge portion extends up and down and can cut in the direction of the rotation tangent. Milling is performed on a workpiece through the at least one rotating edge portion, and the burrs generated by the milling processing are removed by the at least straight edge portion, so that the processing surface of the workpiece is more smooth.

Description

Milling cutter

This new model relates to a milling tool, in particular to a milling tool suitable for being installed on a processing tool of a drilling machine or a milling machine and used for drilling or milling fiber materials.

Using a general spiral milling cutter to drill or mill fiber materials will be because the fiber material itself has several fibers that extend and interweave in different directions. If the fiber extends in the same direction as the spiral direction of the cutting edge of the milling cutter, it will not be effective. Remove, leaving burrs on the processed surface. A milling cutter disclosed in Taiwan Patent I577477 has a left-handed cutting edge and a right-handed cutting edge, so that the milling cutter has both left-handed and right-handed cutting capabilities. Therefore, it can be used by the milling cutter regardless of the extending direction of the continuous fiber. Staggered cutting and removal to make the processing surface more smooth.

However, during machining, if the milling cutter rotates to the right, the right-handed cutting edge will generate a cutting force extending upward and right, and the left-handed cutting edge will generate a cutting force extending downwards and right. Therefore, the milling cutter will affect the workpiece to be processed. Two opposing component forces are generated. Therefore, during the machining process, the right-handed blade and the left-handed blade repeatedly contact the workpiece to produce high-frequency noise.

Therefore, the object of the present invention is to provide a milling cutter that can overcome at least one of the disadvantages of the prior art.

Therefore, the new milling cutter includes a shank segment and a blade segment, the blade segment is integrally connected with the shank segment, and includes at least one rotary blade portion and at least one blade portion arranged at intervals around a rotation axis extending up and down. Straight edge. The at least one turning edge portion has a plurality of turning knife edges arranged at intervals up and down and spirally extending around the rotation axis, and the at least straight edge portion extends up and down and can cut in the direction of the rotation tangent.

The effect of the present invention is that the cutting direction generated by the at least one turning edge portion and the at least straight edge portion is different, and when a workpiece made of fiber material is processed, the fibers in any extending direction of the workpiece can be cut . And although the cutting direction of the at least straight edge portion is staggered with the cutting direction of the at least one rotating edge portion, the at least straight edge portion only generates cutting force along the tangential direction of the rotation, so there is no repeated up and down force along the axis of rotation. High-frequency noise caused by.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are represented by the same numbers.

1 to 4, a first embodiment of the new milling cutter is suitable for installation in processing tools such as drilling machines, milling machines, etc. (not shown), and can be driven by the processing tool to extend the rotation axis 91 around it. Rotate in a rotating cutting direction 92 to perform milling processing on a processing object (not shown) made of fiber material. The milling cutter includes a shank section 1 and a cutting edge section 2 integrally connected with the shank section 1.

The blade segment 2 includes two rotating blade portions 21 spaced apart around the rotation axis 91, and two straight blade portions 22 respectively bordered between the rotating blade portions 21, the rotating blade portions 21 and the straight The blade portions 22 are arranged at equal angular intervals around the axis of rotation 91, and extend from the shank section 1 along the axis of rotation 91 toward the rotation and cutting direction 92 obliquely. The blade portions 21, 22 are aligned with the axis of rotation. The included angle formed by 91 is 5°. The rotating blade portions 21 and the straight blade portions 22 cooperate to define four chip flutes 20 interposed therebetween.

Each rotating blade portion 21 has a plurality of rotating blades 211 arranged up and down spaced apart and extending spirally around the rotation axis 91. Each rotating blade 211 has two first blade surfaces 212 connected up and down, and a first blade surface 212 connected by the first A turning edge 213 is formed by the intersection of a blade surface 212. Two adjacent rotary blades 211 jointly define a rotary blade groove 210.

Each straight edge portion 22 has two second blade surfaces 221 extending up and down and connected, and a straight blade end 222 formed by the intersection of the second blade surfaces 221. The cutting edge segment 2 defines a cutting circle 23 when rotating around the rotation axis 91, and the outer peripheries of the rotating edge ends 213 and the straight edge ends 222 all fall on the cutting circle 23.

In use of the first embodiment, the tool handle section 1 is mounted on the processing tool, and driven by the processing tool, the blade section 2 rotates around the rotation axis 91 relative to the processing object in the rotating cutting direction 92 rotation. Since the processed object is interwoven by a plurality of interlaced fibers (not shown), fibers that are different from the extending direction of the blade ends 213 will be generated by the rotation of the blade ends 213 The cutting force of the cutting force is removed; the fibers that are close to the extending direction of the rotating edge ends 213 may just be located in the rotating edge grooves 210 without being cut and produce burrs. At this time, the straight edge ends 222 It will cut in the direction of its rotation tangent and remove it at the same time, so that no burr remains on the processed surface of the processed object. The removed debris (not shown) is discharged from the chip flutes 20.

It should be particularly noted that the number of the rotating blade portions 21 and the straight blade portions 22 is not limited to two. In terms of implementation, in other variations of the first embodiment, there may be only one rotating blade. The part 21 and a straight edge part 22 can achieve the expected purpose of milling, drilling and deburring. In addition, the rotating blade portions 21 and the straight blade portions 22 are preferably arranged at equal angles, which will be better in overall structural strength and balance, but they can also be arranged at different angular intervals in implementation.

5 and 6, a second embodiment of the new milling cutter is different from the first embodiment in that the angle formed by the blade portions 21, 22 and the rotation axis 91 is 15°. In the second embodiment, during processing, the contact area between the blades 21, 22 and the processed object is larger than that of the first embodiment, and the load of the blades 21, 22 is smaller, which is beneficial to lengthening The life of the milling cutter.

However, when the angle formed by the blades 21, 22 and the rotation axis 91 becomes larger, if the milling cutter is not provided with a greater rotary cutting force, it will be because the blades 21, 22 and the processing object The contact area is too large, causing the cutting force of the cutting edges 21 and 22 to decrease, and the burrs cannot be effectively removed. If the angle formed by the blades 21, 22 and the rotation axis 91 is greater than 30°, the function of removing burrs is no longer available; if the blade 21, 22 and the rotation axis 91 are formed When the included angle is less than 5°, the interaction force between the blades 21, 22 and the workpiece is too large, and the blades 21, 22 are easily damaged. Therefore, the blades 21, 22 and the rotation axis 91 The better design of the included angle should be between 5° and 30°.

In summary, the effect of the new type of milling cutter is that the cutting angles of the rotating blade portions 21 and the straight blade portions 22 are staggered, so that when processing the processed objects with fibers with various extension angles, Thoroughly mill the part of the processed object that needs to be removed and reduce the generation of burrs, so that the processed surface is more smooth, and the straight edge portions 22 will not produce the processed object. Contrary to the turning edge 21 produced on the processed object The force can greatly reduce the high-frequency noise, therefore, the purpose of the present invention can indeed be achieved.

However, the above-mentioned are only examples of the present model, and should not be used to limit the scope of implementation of the present model, all simple equivalent changes and modifications made in accordance with the patent scope of the present model application and the contents of the patent specification still belong to This new patent covers the scope.

1: Tool handle section 2: Blade segment 20: Chip flute 21: Rotating Blade 210: Rotary Blade Slot 211: Rotating Blade 212: first knife face 213: Rotating Blade End 22: Straight edge 221: second knife face 222: straight edge 23: Cutting circle 91: Rotation axis 92: Rotating cutting direction

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective view of a first embodiment of the new milling cutter; Figure 2 is a perspective view of the first embodiment from another perspective; Figure 3 is a side view of the first embodiment; Figure 4 is a cross-sectional view taken along the line A-A in Figure 3 Figure 5 is a perspective view of a second embodiment of the new milling cutter; and Fig. 6 is a side view of the second embodiment.

1: Tool handle section

2: Blade segment

20: Chip flute

21: Rotating Blade

210: Rotary Blade Slot

211: Rotating Blade

212: first knife face

213: Rotating Blade End

22: Straight edge

221: second knife face

222: straight edge

91: Rotation axis

92: Rotating cutting direction

Claims (7)

A milling cutter, including: A shank section; and A blade section, which is integrally connected with the shank section, includes at least one rotating blade portion and at least one straight blade portion arranged at intervals around a rotating shaft center extending up and down, the at least one rotating blade portion has a plurality of vertically spaced arrangement and The rotary blade extending spirally around the rotation axis has at least the straight edge portion extending up and down and capable of cutting in the rotation tangential direction. The milling cutter according to claim 1, wherein the cutting edge segment includes two rotating blade portions arranged at intervals around the axis of rotation, and two straight blade portions respectively bordering the rotating blade portions, and the The rotating blade part cooperates with the straight blade parts to define four chip flutes interposed between each other. The milling cutter according to claim 1, wherein the at least one rotary edge portion and the at least one straight edge portion extend obliquely from the shank portion outward along the axis of rotation toward a rotating cutting direction. The milling cutter according to claim 2, wherein the rotary blade portions and the straight blade portions are arranged at equal angular intervals around the axis of rotation. The milling cutter according to claim 1, wherein each of the rotary cutting edges has two first cutting faces, and a rotary cutting edge end formed by the intersection of the first cutting faces, and the rotary cutting edge ends fall on a cutting On the circumference, the at least straight edge portion has two second blade surfaces extending up and down, and a straight blade end formed by the intersection of the second blade surfaces, and the outer peripheral edge of the straight blade end does not protrude from the cutting circle. The milling cutter according to claim 3, wherein the angle formed by the at least one turning edge portion and the axis of rotation is between 5° and 30°, and the at least one straight edge portion and the axis of rotation are formed by The included angle is between 5° and 30°. The milling cutter according to claim 3, wherein the angle formed by the at least one rotating blade portion and the axis of rotation is between 5° and 15°, and the at least one straight edge portion and the axis of rotation are formed by The included angle is between 5° and 15°.

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