JP5344644B2 - Milling tool for bamboo cutting and grinding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a milling tool capable of reducing generated noises and vibrations in a process for pulverization-milling of an end face of a tubular cutting workpiece and improving productivity of the process and further considerably extending the life duration of the milling tool. <P>SOLUTION: On an end face 4a of a tool body 4 on which chips T acting as a cutting edge are attached, a milling tool 2 circumferentially includes a plurality of chip rows A, B in which a plurality of the chips T is apposed in a radially extended manner. Each of the chips T in an adjacent pair of the chip rows A, B is arranged in a zigzag form with radial distances, from a rotary center axis line X, allowed to alternately differ from each other. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

The present invention relates to a milling tool for bamboo cutting and grinding , and more particularly to a milling tool suitable for cutting and grinding an end face of a cylindrical workpiece.

  An apparatus for cutting an end surface of a relatively large-diameter “bamboo”, which is a cylindrical workpiece, has been developed (see, for example, Patent Document 1).

  This apparatus will be described with reference to FIG. 5 of Patent Document 1. The rotating cutting teeth 20 formed by stacking a plurality of disk-shaped tip saws 38 in a cylindrical shape are rotated about a vertical axis. The bamboo 24 is moved to the outer peripheral surface in the horizontal direction, and rotated and fed to cut and pulverize the end surface.

Japanese Patent Laying-Open No. 2003-236403 (FIG. 5)

  The conventional cutting apparatus of the above-mentioned form has the following problems to be solved.

  This cutting machine is a horizontal feed when considering milling, and it does not make sense for milling, and it is rotated simultaneously with the horizontal rotation of bamboo against a cylindrical rotating cutting tooth. Yes. When the bamboo cylinder is flattened, the feed of the bamboo in the longitudinal direction is the normal cutting direction in the cutting direction of the rotating cutting teeth, but the rotating direction is transverse to the teeth and the force is pushed in a direction that cannot be cut by the rotating cutting teeth. Will be attached. Therefore, vibration and noise are caused, and the blade is damaged and cutting performance is deteriorated. Thus, there are problems to be improved such as high vibration and noise, low productivity, and short tool life.

  The present invention has been made in view of the above facts, and its technical problem is to reduce the generation of noise and vibration in the cutting and pulverization processing of the end face of a cylindrical workpiece, to improve productivity, and To provide a tool capable of greatly improving the life of a cutting tool.

  As a result of intensive studies and experiments, the present inventor has developed a milling tool that improves the problems in the conventional cutting apparatus.

According to the present invention, as a milling tool that solves the above technical problem, chipping “bamboo” by pressing and feeding the circular “bamboo” round end face toward the tip row of the end face of the tool body rotated around the central axis. A milling tool for cutting and pulverizing with a plurality of rows of chips arranged in a radial direction on the end surface of a tool body to which a chip as a cutting blade is attached, and a pair of adjacent chip rows Are arranged in a zigzag pattern with alternately different radial distances from the rotation center axis, and the end face of the tool body provided with the tip row is located radially inward and rearward from the end of the end face side of the tool body. There is provided a milling tool for bamboo cutting and grinding characterized by being formed into an inclined concave shape.

  A milling tool constructed in accordance with the present invention comprises a plurality of rows of chips arranged in a radial direction on the end face of a tool body to which a chip as a cutting edge is attached, and a pair of adjacent chip rows. Each of these chips is arranged in a staggered manner with alternately different radial distances from the rotation center axis.

  Therefore, the cutting with this milling tool is a front cutting method in which the end face of the workpiece is directly opposed to the milling tool, and a straight feed speed is obtained by rotating the cylindrical workpiece. Depth of cut. Therefore, generation of noise and vibration can be reduced, productivity can be improved, and the life of the cutting tool can be greatly improved.

BRIEF DESCRIPTION OF THE DRAWINGS (a) Front view of the milling tool comprised according to this invention, (b ) is structure explanatory sectional drawing shown in the 1A-1A arrow direction of ( a). Explanatory view showing a cutting ground form of a milling machining again and again by the cutting of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Outline | summary explanatory drawing of the cutting-pulverization apparatus using the milling tool of this invention.

  Hereinafter, a milling tool constructed according to the present invention will be described in more detail with reference to the accompanying drawings illustrating preferred embodiments.

  A description will be given with reference to FIG. A milling tool generally indicated by numeral 2 is provided adjacent to the end surface 4a of the tool body 4 to which the chips T, which are cutting edges, are attached. The chips T of the pair of chip rows A and B are arranged in a zigzag pattern in which the radial distances from the rotation center axis X are alternately different.

  The milling tool 2 of this embodiment includes a pair of chip rows A and B having three sets at equal intervals in the circumferential direction in the order of A, B, A, and B, that is, six chip rows. ing. The tip T is attached so as to cut the workpiece pressed from the direction perpendicular to the paper surface when rotated in the counterclockwise direction indicated by the arrow Z.

  A description will be given with reference to FIG. 1B together with FIG. The end surface 4a of the tool main body 4 provided with the chip rows A and B is formed in a concave shape inclined at an angle θ1 (30 ° in the embodiment) from the tip on the end surface 4a side of the tool main body 4 to the rear in the radial direction. Hereinafter, this form of the milling tool 2 is referred to as a concave cutter 2a.

  In the chip row A, three chips T are attached to the positions of radii R1, R3, and R5 sequentially from the rotation center axis X. In the chip row B, two chips T are attached at positions of radii R2 and R4 sequentially from the rotation center axis X. The radii R1 to R5 are sequentially set to be larger, and the chips T are arranged in a staggered manner with radial distances from the rotation center axis X being alternately different. Accordingly, the diameter of the workpiece to be cut is determined by the chips T arranged in a staggered manner.

  In this embodiment, there are six chip rows (three pairs of A and B), and three chips T are arranged in the chip row A and two in the chip row B. The number is appropriately set depending on the size and properties of the workpiece and the required size of the cutting powder.

  The tip T is obtained by attaching a well-known polygonal throwaway cutter with attachment fittings, screws or the like as well-known attachment means. Therefore, the detailed description is omitted.

Next, with reference to FIG. 2 , the processing form of the cylindrical workpiece using this milling tool 2 (concave cutter 2a) is demonstrated.

The workpiece W is fed on the same axis as the rotation axis X toward the tip T of the concave cutter 2a (in the direction of the arrow Y), and is rotated or moved in the direction Z1 opposite to the rotational direction Z of the concave cutter 2a. Cutting and pulverization are performed by the chips T arranged in a staggered pattern in the direction.

At this time, in the concave cutter 2a, as is clear from FIG. 2 , the outer peripheral portion of the end face of the workpiece W is first scraped by the tip T (indicated by an arrow S). Therefore, concave cutter 2a is suitably outside the material of the cylindrical object to be cut W is not solid "Bamboo".

  For a thick cylindrical workpiece WL exceeding the maximum diameter of the disposed tip T, the center axis of the cylinder is not the same as the axis X of the concave cutter 2a while rotating the workpiece WL. By cutting and feeding while pressing the portion of the maximum diameter tip T with an angle, the opposite side of the cylindrical workpiece WL that is in contact with the tip T is removed from the concave cutter 2a for cutting. (Indicated by the axis XL and the rotation direction ZL).

  In addition, for example, even if the workpiece is a cylinder or a substantially oval shape such as “bamboo” rather than a perfect circle, the chips T are arranged in the radial direction. Even if it is large, it can be cut and ground within the cutting range of the chip T.

  In the cutting by the milling tool 2, the rotation applied to the workpiece is a straight feed speed with respect to the tip T, which is a cutting blade, and the feed indentation becomes the cutting depth of the tip T. Therefore, it is an obedient face-cutting method. According to the experiment with “bamboo”, noise and vibration are greatly reduced compared to the conventional method, productivity is more than 3 times, and tool life is more than 10 times. It was confirmed that

Next, with reference to FIG. 1 and FIG. 3 mainly, FIG. 3 will be described with reference to FIG. The cutting and grinding device 8 includes a plurality of chip rows A on the end face 4a of the concave cutter 2a, which is rotatably attached to the milling tool 2 (concave cutter 2a) in the Z direction by the driving means 10 and rotated about the central axis X. The “bamboo W” is cut and pulverized by the plurality of chips T by rotating the “bamboo W” in the opposite direction Z1 toward the direction B (FIG. 1) and pressing and feeding it in the direction Y facing the ring-cut end face. The cutting and pulverizing apparatus 8 includes support means 12 and includes a rotation mechanism of “bamboo W” in the Z1 direction, a feed mechanism in the Y direction, and the like.

  As mentioned above, although this invention was demonstrated in detail based on the Example, the effect of the milling tool 2 as mentioned above is demonstrated collectively.

  The milling tool 2 configured according to the present invention includes a plurality of rows of chips arranged in a radial direction on the end surface of the tool body 4 to which the chips T as cutting edges are attached, and are adjacent to each other. The chips T of the pair of chip rows A and B are arranged in a zigzag pattern in which the radial distances from the rotation center axis X are alternately different.

  The cutting with the milling tool 2 is a front cutting method in which the end surface of the workpiece is directly opposed to the milling tool 2, and a straight feed speed is obtained by rotating the cylindrical workpiece. Depth of cut. Further, it is possible to cut and pulverize workpieces having a large diameter to a small diameter, and even those that are not perfect circles. Therefore, noise and vibration can be reduced, productivity can be improved, and the life of the cutting tool can be greatly improved.

A concave cutter 2a in which the end surface 4a of the tool body 4 provided with the chip rows A and B is formed in a concave shape that inclines radially inward and rearward from the tip on the end surface 4a side of the tool body 4 is a cylindrical workpiece W. is suitable for cutting grinding of the outer material is not solid "bamboo".

  The milling tool 2 cuts and pulverizes the “bamboo” by pressing and feeding the cylindrical “bamboo” round end faces toward the chip rows A and B of the end surface 4a of the tool body 4 rotated around the central axis X. It is suitable as a tool.

2: Milling tool 2a: Concave cutter (milling tool )
4 : Tool body 4a: End face A: Tip row B: Tip rows R1 to R5: Radial distance T: Tip X: Center axis of rotation

Claims (1)

A milling tool that cuts and crushes `` bamboo '' with a tip by pressing and feeding a circular end face of a cylindrical `` bamboo '' toward the tip row of the end face of the tool body rotated by a central axis,
On the end face of the tool body to which the chips that are cutting blades are attached, a plurality of chip rows are provided in the circumferential direction with a plurality of chips arranged radially,
Each of the chips in a pair of adjacent chip rows is arranged in a staggered manner with alternately different radial distances from the rotation center axis.
The end surface of the tool body provided with the chip row is formed in a concave shape that is inclined radially inward and rearward from the tip of the end surface side of the tool body.
A milling tool for bamboo cutting and pulverizing .

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