JP2012056060A - Cutting tool for h-section steel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such problems that a conventional cutting tool used in additional cutting, root face machining and scallop finishing of an H-section steel causes large impact and vibration in cutting, thus causing hard wear of a cutting edge chip and sometimes leading to fracture, and that improvement has been demanded in an aspect of working environments as well due to large noise.SOLUTION: Numerous multi-edged cutting tools 11 including numerous cutting edge chips 13 attached at small array pitches around a circumference of a thin disk-like base metal 12 are stacked, thereby structuring a first cutting tool A having a cylindrical cutting peripheral surface. In addition, numerous multi-edged cutting tools 21a-21g including numerous cutting edge chips a-g attached at small array pitches around circumferences of thin disk-like base metals 22a-22g are stacked, thereby structuring a second cutting tool B having a mushroom-shaped cutting peripheral surface. The first cutting tool A and the second cutting tool B are mounted on the same rotating shaft 30 to cut a flange and a web of the H-section steel.

Description

  The present invention relates to a cutting tool for performing root face processing on a flange in an H-section steel and performing scallop processing on a web.

  The column beam connection structure of the steel frame joint in a high-rise building will be described with reference to FIG. In the figure, reference numeral 100 denotes a square steel pipe constituting a column material 101, 102 denotes diaphragms provided at both upper and lower ends of the square steel pipe 100, 103 denotes an H-section steel constituting the beam material 104, 105 denotes a flange in the H-section steel 103, 106 denotes both flanges Webs 107 and 108 connecting 104 and 105 are groove portions 109 and 110 formed on end surfaces of the flanges 104 and 105, scallop portions 111 and 112 formed by cutting out the web 106 are flanges 104 and 105 and a diaphragm 101, This is a backing metal disposed at the abutting portion of 102.

  In the above-described branch port configuration, the groove portions 107 and 108 of the flanges 104 and 105, the diaphragms 101 and 102, the web 106, and the butt portion of the vertical plane of the square steel pipe 100 are all welded to join the column beams. This welding method is completed, and the welding method is called a scallop method because the concentration of the weld line is released by the scallop portions 109 and 110.

  In addition, in the bracket structure in the case where the above-mentioned steel support part is manufactured in advance at the factory, the groove portions 107 and 108 of the flanges 104 and 105 are both inclined surfaces facing outward as shown in the figure. In the case where a long H-shaped steel is directly welded as a beam material in the field, there is a case in which one groove portion is an inclined surface facing inward from the viewpoint of securing a downward posture work.

By the way, the invention according to the proposal of the present applicant is known as a processing apparatus that performs the necessary groove processing on the flanges 104 and 105 in the H-shaped steel 103 and performs the scallop processing on the web 106. . (For example, refer to Patent Document 1).

  In this conventional machining apparatus, as shown in FIG. 17, first to third rotating shafts 201 to 203 are disposed on the machining head 200, and the first rotating shaft 201 has a cylindrical cutting peripheral surface. The first processing blade 211 is provided with a second processing blade 212 having a mushroom-shaped cutting peripheral surface on the second rotating shaft 202, and the frustoconical cutting peripheral surface is provided on the third rotating shaft 203. Each of the third processing blades 213 having the same is attached.

Then, by moving the machining head 200 in the required feed direction, as shown in FIG. 18, groove processing was performed on the flange 104 of the H-section steel 103 and scallop processing was performed on the web 106. Is. In addition, the first cutting blade 211 performs a follow-up process that sharply cuts the flange 104 prior to cutting with another processing blade. At the same time, this cutting tool has a part at the cutting end of the flange 104. This is a so-called root face process that leaves a flat surface.

In addition to the above, the invention according to Patent Document 2, for example, is known as a prior art for performing various processes on the groove, scallop and root face. As shown in FIG. 19, the conventional processing apparatus includes a first processing blade 221 having a cylindrical cutting peripheral surface and a second processing blade 222 having a mushroom-shaded cutting peripheral surface. The rotary shaft 223 is assembled and attached. And this cutting-tool structure aims at improving the working efficiency by shortening the moving stroke.

In addition, as the above-mentioned processing blade having a cylindrical cutting peripheral surface, for example, the one disclosed in Patent Document 3 is known, and as the processing blade having a frustoconical cutting peripheral surface, for example, Patent Document No. 4 is publicly known, and as a cutting tool having a mushroom shade-shaped cutting peripheral surface, for example, the one disclosed in Patent Document 5 is known.

JP-A-9-267210 JP 59-30608 Japanese Patent Publication No. 3-43010 JP-A-6-262421 JP-A-10-296523

  When focusing on the follow-up to the flange and the root face processing and the scallop processing on the web in the H-shaped steel, conventionally, the processing apparatus described in Patent Document 1 or Patent Document 2 is used, and the cylinder of Patent Document 3 is used for this. The machining tool having a cutting peripheral surface having a shape and the processing tool having a mushroom-shaped cutting circumferential surface of Patent Document 5 are provided.

The above-described cutting of the flange requires high-speed feeding for a large processing amount (cutting cross-sectional area and length), and the cutting of the web is forced to rapidly cut into a portion having a low structural strength. For this reason, a processing blade in which a small number of cutting edge tips are implanted is a burden that is too large to cover this, causing a large impact and vibration in processing, resulting in severe wear and tear of the cutting edge tips. The problem was pointed out. In addition, the noise was loud and drastic measures were required in terms of work environment.

  The present invention is intended to solve such problems of the prior art, reduce the impact and vibration, eliminate severe wear and tear of the cutting edge tip, and suppress the generation of noise to make the work environment healthy. An object of the present invention is to provide an H-shaped steel cutting tool that can be maintained and that can achieve a cutting operation at a high speed.

In order to achieve the above object, an H-shaped steel cutting tool according to the present invention includes a first processing tool having a cylindrical cutting peripheral surface and a second cutting tool having a frustoconical cutting peripheral surface. A machining tool and a third machining tool having a mushroom-shade-shaped cutting peripheral surface. With these first to third machining tools, groove processing and root face machining are performed on the flange of the H-shaped steel. In the cutting tool for performing scalloping, at least the second processing tool is composed of a multi-blade tool composed of a disk-shaped base metal and a number of cutting edge chips attached to the outer periphery of the base metal. It is characterized by.

The cutting tool of the present invention is the superposition of a multi-blade tool comprising a disk-shaped base metal and a large number of cutting edge chips attached to the outer periphery of the base metal tool. It is characterized by comprising.

  The cutting tool of the present invention is characterized in that, in claim 3, the cutting edge tip is fixed to the outer peripheral portion of the base metal by brazing.

The cutting tool of the present invention is characterized in that, in claim 4, the cutting edge tip is provided on the outer peripheral portion of the base metal in a replaceable manner.

Further, the cutting tool of the present invention is characterized in that, in claim 5, adjacent cutting edge chips are arranged in a rotational direction in the overlapping direction of the multi-blade cutter.

The cutting tool of the present invention is characterized in that, in claim 6, the thickness of the base metal is equal to the width of the cutting edge tip.

The cutting tool of the present invention is the cutting tool according to claim 7, wherein the first processing tool and the second processing tool are attached to different adapter shafts, and the adapter shafts are attached so as to be detachable from the rotation shaft. It is characterized by this.

According to the problem solving means configured in this way, far more cutting edge tips can be arranged on the cutting peripheral surface than in the prior art. For this reason, the cutting load per blade can be reduced, and cutting with less impact and vibration can be performed. Therefore, it is possible to rationally solve problems such as severe wear and loss of the cutting edge tip and noise. In addition, it has an excellent effect of being able to perform highly efficient cutting by improving the cutting ability.

It is a vertical side view which shows one Example of the cutting tool of the H-section steel which concerns on this invention. It is a front view of the multi-blade cutter which comprises the 1st processing cutter. Similarly, it is explanatory drawing which shows the shape of a cutting edge chip | tip. It is a front view of a blade structure using a replaceable cutting edge tip. Similarly, it is a side view. It is explanatory drawing of the cutter structure using another exchange-type cutting blade chip | tip. It is explanatory drawing of the cutter structure which made the thickness of a base metal and the width | variety of a cutting blade chip | tip equivalent. Similarly, it is explanatory drawing which shows the arrangement | sequence state of a cutting blade chip | tip. It is a front view which shows the attachment state of a replaceable cutting blade chip | tip. Similarly, it is a vertical side view. It is explanatory drawing of the cutting-edge chip | tip with a split-type cutting-edge. It is a front view of the multi-blade cutter which comprises the 2nd cutting tool. Similarly, it is a front view of a multi-blade cutter arranged at another position. It is explanatory drawing of the processing state by the cutting blade cutter which concerns on one Example. It is a vertical front view of the 3rd processing knife. It is explanatory drawing which shows a column beam junction structure. It is a vertical front view which shows a part of conventional groove processing apparatus. Similarly, it is explanatory drawing which shows the processing state by the conventional processing apparatus. Similarly, it is explanatory drawing of the conventional processing apparatus.

Hereinafter, an embodiment of a cutting tool according to the present invention will be described with reference to FIGS. 1 to 3, 12, and 13. In the figure, A is a first cutting tool having a cylindrical cutting peripheral surface, and B is a second processing blade having a blade shape with a cutting peripheral surface. The above-described second machining blade B has a larger diameter than the first cutting blade A, and both are connected and disposed.

The first processing blade A includes a multi-blade blade 11 having a thin disk-shaped base metal 12 and a large number of cutting edge chips 13 that are brazed and fixed to the outer periphery of the base metal 12 with a small arrangement pitch. A large number (10 in the embodiment) are overlapped. Reference numeral 14 denotes a mounting hole (see FIG. 2) provided at the center of the base metal 12.

The thicknesses, cutting widths, outer dimensions, the number of arrays of cutting blade tips 13 and the like of each of the multi-blade cutters 11 and 11 are the same, and the cutting peripheral surface drawn by the cutting blade ridge has a smoothly continuous cylindrical shape. .

Note that the cutting width of the cutting edge tip 13 is wider than the thickness of the base metal 12 (see FIG. 3) as in the case of a commercially available tip saw, and each cutting edge tip 13 has a base metal adjacent in the overlapping direction. It arrange | positions corresponding to the chip pocket 15, and eliminates interference. Reference numerals 14a and 14b denote key grooves which are provided in the mounting hole 14 with a rotational phase difference and serve both as positioning and rotation prevention.

The second processing blade B is composed of thin disk-shaped base metals 22a to 22g and a large number of cutting edge chips a to g fixed by brazing to the outer periphery of the base metals 22a to 22g with a small arrangement pitch. The multi-blade cutters 21a to 21g are stacked to form a large number (seven in the embodiment). Reference numeral 24 denotes a mounting hole (see FIGS. 12 and 13) provided at the center of the base metals 22a to 22g.

The thickness and blade width of each of the multi-blade cutters 21a to 21g are the same, but the external dimensions and the number of cutting blade tips are different, and the cutting edge ridges of all the cutting blade tips a to g are drawn. The cutting peripheral surface has a smooth and continuous mushroom shade shape.

The cutting widths of the cutting edge tips a to g are wider than the thicknesses of the base metals 22a to 22g as in the case of a commercially available tip saw, and the cutting edge tips a to g are adjacent to each other in the overlapping direction. Are arranged corresponding to the chip pockets 25 to eliminate interference. Reference numeral 24a denotes a key groove provided in the mounting hole 24 for both positioning and rotation prevention.

Next, reference numeral 16 denotes a hollow first adapter shaft having a fixing flange 17 at one end and a fastening rod 18 at the other end. A plurality of multi-blade cutters 11 to 11 are attached to the adapter shaft 16 by mounting holes 14. Wear. These multi-blade knives 11 to 11 are fixed by an attachment screw 19 screwed to the tightening rod 18 to constitute a first processing blade A.

26 is a second adapter shaft provided with a fixing rod 27 at one end and a tightening rod 28 at the other end. Multiple adapter blades 21 a to 21 g are mounted on the adapter shaft 26 through mounting holes 24. These multi-blade knives 21a to 21g are fixed by an attaching screw 29 screwed to the tightening rod 28, and constitute a second machining blade B.

  Reference numeral 30 denotes a rotating shaft 31 of a groove processing device (not shown), and reference numeral 31 denotes an attachment shaft provided at the tip of the rotating shaft 30. The first machining blade A is attached to the attachment shaft 31 via the first adapter shaft 16. Further, the second adapter shaft 26 is fitted to the mounting shaft 31 using the hollow hole 16 a of the first adapter shaft 16, and the second machining blade B is attached via the adapter shaft 26.

32 is a fixing screw that fastens and fixes the second adapter shaft 26 to the mounting shaft 31 via the washer member 34. This fixing screw 32 simultaneously fastens and fixes the first adapter shaft 16 to the end of the rotary shaft 30. Yes, the first machining tool A and the second machining tool B are attached and fixed. The outer shapes of the first adapter shaft 16 and the second adapter shaft 26 are the same.

Note that the first adapter shaft 16 and the second adapter shaft 26 with respect to the mounting shaft 31 are provided with a rotation preventing measure by a key member, and the first machining blade A with respect to the first adapter shaft 16, The second machining blade B with respect to the second adapter shaft 26 is provided with a non-rotating measure by a similar key member (both not shown).

  FIG. 15 shows the configuration of the third processing blade. Also in the case of the third processing cutter C, a large number of cutting edge tips 42 are attached to the outer peripheral portion of the thin disk-shaped base metal 41 in the same manner as the first processing cutter A and the second processing cutter B described above. The multi-blade cutter 40 is configured. Then, a plurality of these multi-blade cutters 40 are overlapped to form a machining cutter having a frustoconical cutting peripheral surface. In addition, this 3rd processing cutter C can use the conventional cutter from the relationship of cutting amount, when the thickness of the flange 104 is small.

  When the H-shaped steel is cut with the machining tool configured as described above, the cylindrical cutting peripheral surface of the first machining tool A acts on the flange 104 as shown in FIG. In addition, a mushroom-shaped cutting peripheral surface of the second cutting tool B acts on the web 106 and scallops the same.

  At the time of this cutting, each cutting blade can act on a large number of cutting edge tips 11 to 11 and a to g arranged at a fine pitch. For this reason, the cutting load per cutting edge tip can be remarkably reduced, and smooth and light cutting can be performed without causing large vibrations and impacts. As a result, the cutting ability can be greatly improved, and the machining operation can be performed at high speed. Furthermore, the cutting edge tip was not damaged and it could be used in a durable manner, and the noise level could be significantly reduced.

  The H-shaped steel 103 subjected to the follow-up process, the root face process, and the scallop process in this way is subjected to the groove processing of the flange 104 by the subsequent third processing blade C, and all the cutting processes are completed.

  In addition, the first processing blade A and the second processing blade B of the one embodiment described above are those that perform edge cutting according to a conventional method when the sharpness of the cutting edge tip is reduced or chipping occurs. This can be reused. However, since these blades have a large number of constituent members, it takes a long time for polishing work, and the shape is peculiar, and requires the skill of a skilled worker. Moreover, the cutting peripheral surface changes due to frequent polishing, which is not preferable from the viewpoint of maintaining machining accuracy.

  In order to eliminate the disadvantages of the brazing tip described above, it is preferable to adopt a throw-away tip method in which the cutting edge tip can be replaced.

  This throw-away tip method can be similarly implemented on the first processing blade A and the second processing blade B. These blade configurations will be described collectively on one first machining blade A. (The description of the other second processing blade B is omitted.)

4 and 5, 53 is a lower receiving seat provided on the base metal 52, 54 is also a vertical receiving seat, 51 is a cutting edge tip, and this has a plurality of (two in the embodiment) cutting edge ridges. Any cutting edge ridge can be set at the cutting position by turning. Reference numeral 55 denotes a fastening screw for attaching and fixing the cutting edge tip 51. When the length of the cutting edge, that is, the blade width is large, a chip dividing groove 56 is provided at the center.

FIG. 6 shows a blade structure when the thickness of the base metal 62 is small and the width of the cutting edge tip 61 is small accordingly. 63 is a lower receiving seat 64 provided on the base metal 62, and a standing receiving seat 65 is an elastic pinching piece provided corresponding to the lower receiving seat 63 and the standing receiving seat 64. The cutting edge tip 61 is a self-restraining type held by the receiving seats 63 and 64 and the pressing piece 65.

  Moreover, in each Example demonstrated above, the width | variety of a cutting blade chip | tip is set large with respect to the thickness of a base metal like a general blade. For this reason, there is a restriction that the cutting edge tip of one base metal must be allowed to escape into the chip pocket of the other base metal between adjacent multi-blade tools.

  The embodiment of FIG. 7 eliminates the above-mentioned problem of the interference of the cutting edge tip and allows the cutting edge tip to be arranged at a free position. 71 is a base metal 72 is a cutting edge chip, and the thickness and width (w1, w2) of both are the same. Then, this makes it possible to arrange adjacent cutting edge tips slightly shifted in the same position or in the rotation direction. (Refer FIG. 8) According to said structure, the chip pocket 73 can be communicated laterally and chip | tip discharge property can be made favorable.

Setting the thickness of the base metal 71 and the blade width of the cutting edge tip 72 equally can be applied regardless of the brazing tip and the throw-away tip.

When a cutting edge tip having the same base metal thickness and blade width is used, as shown in FIGS. 9 and 10, the cutting edge tip 82 is fixed to the base metal 81 adjacent in the stacking direction with a screw 83. be able to. When the blade width is larger than the base metal thickness, the side surface of the cutting edge tip 82 that contacts the adjacent base metal 81 is flattened, or a concave surface for contact is provided on the side surface of the base metal 81. That's fine.

Further, as shown in FIG. 3, a large number of cutting edge chips 13 attached to a single base metal, for example, 12 all had the same shape of cutting edge ridges, but those having different cutting edge ridges as shown in FIG. 11. It can also be combined. Thus, by dividing each of the cutting edge tips 13a to 13c and hitting them, the impact and vibration can be further reduced.

In the embodiment shown in FIG. 1, the first adapter shaft 16 and the second adapter shaft 26 are provided separately, and thereby the first processing blade A and the second processing blade are provided on one rotating shaft 30. B is attached. However, it is easy in design to use one adapter shaft and attach both the first processing blade A and the second processing blade B together. Furthermore, the 1st processing blade A and the 2nd processing blade B can also be directly attached to the rotating shaft 30, without using an adapter shaft.

In the description of the above embodiment, the groove machining is performed by the third machining cutter C after the cutting by the first machining knife A and the second machining knife B. Can be processed in reverse order. When doing in this way, the cutting with the 1st processing knife A can be made into the minor thing only of root face processing. Therefore, it is not necessary to superimpose the multi-blade cutter 11, and one piece is sufficient. At this time, the third processing blade C is responsible for the follow-up processing along with the groove processing.

A 1st processing cutter B 2nd processing cutter 11 Multi-blade cutter 12 Base metal 13 Cutting blade tip 14 Mounting hole 15 Chip pocket 16 First adapter shaft 16a Hollow hole 17 Fixing flanges 21a to 21g Multi-blade cutter 22a to 22g Base metal a to g Cutting edge chip 25 Chip pocket 26 Second adapter shaft 30 Rotating shaft 31 Mounting shaft 32 Fixing screw 51 Cutting edge chip 52 Base metal 53 Lower seat 54 Standing seat 55 Tightening screw 61 Cutting edge tip 62 Base plate 63 Lower seat 64 Standing seat 65 Elastic pinching piece 71 Base plate 72 Cutting tip 81 Base plate 82 Cutting tip 83 Screw 103 H-section steel 104 Flange 106 Web

Claims (7)

A first cutting tool having a cylindrical cutting peripheral surface, a second processing tool having a mushroom-shaped cutting peripheral surface, and a third processing tool having a frustoconical cutting peripheral surface. In the cutting blade that performs groove processing and root face processing on the flange in the H-shaped steel, and scallop processing on the web by these first to third processing blades,
The first machining tool and the second machining tool described above are disposed on the same rotation axis, and at least the second machining tool is attached to the disc-shaped base metal and the outer periphery of the base metal. An H-shaped steel cutting blade characterized by comprising a multi-blade cutting tool composed of a large number of cutting blade tips.   2. The H-shape according to claim 1, wherein the first machining tool is constituted by a multi-blade tool composed of a disk-shaped base metal and a large number of cutting edge chips attached to the outer periphery of the base metal. Steel cutting tool. 3. The cutting tool for H-shaped steel according to claim 1, wherein the cutting edge tip is fixed by brazing to the outer peripheral portion of the base metal. 3. The cutting tool for H-shaped steel according to claim 1 or 2, wherein a cutting edge tip is provided on the outer periphery of the base metal so as to be exchangeable. 3. The cutting tool for H-shaped steel according to claim 1 or 2, wherein adjacent cutting edge chips are displaced in the rotation direction in the overlapping direction of the multi-blade cutting tool. The H-shaped steel cutting blade according to claim 1 or 2, wherein the thickness of the base metal and the width of the cutting edge tip are made equal. 3. The H of claim 1 or claim 2, wherein the second machining tool and the third machining tool are attached to different adapter shafts, and the adapter shafts are attached so as to be detachable from the rotation shaft. Shaped steel cutting tool.