JP2011255492A - Scallop blade in h-shape steel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scallop blade in H-shape steel which has a large number of cutting edges thereby having greatly improved cutting capability, can reduce an impact and vibration by sharing a cutting amount per edge, and can suppress the generation of the breakage and noise of the cutting edge tip.SOLUTION: At the outer periphery of a disk-like base metal 2a-2m, a large number of cutting edge tips a-m are attached by making array pitches closer. The multiple blades 1a-1m which are thus constituted are superimposed in large numbers to form one machining blade A. Cutting circumferences of these cutting edge tips a-m in the machining blade A form a cutting circumference in the shape of a mushroom cap as a whole.

Description

  The present invention relates to a scalloped cutting tool that forms a notch in a web of H-section steel.

  The beam-column joint structure of the steel frame joint in a high-rise building will be described with reference to FIG. In the figure, 100 is a square steel pipe constituting a column material 101, 102 is a diaphragm provided at both upper and lower ends of the square steel pipe 100, 103 is an H-section steel constituting the beam material 104, 105 is a flange in the H-section steel 103, 106 is a double flange Webs 107 and 108 connecting 104 and 105 are groove portions 109 and 110 formed at 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 vertical plane butt portion of the square steel pipe 100 are welded all around to join the column beams. This welding method is completed, and is called a scallop method because the concentration of the weld line is released by the scallop portions 109 and 110.

  The invention according to the applicant's proposal is known as a mechanical device that performs groove processing on the flanges 104 and 105 in the H-shaped steel 103 and performs notch processing of the scallop portions 109 and 110 on the web 106. (For example, refer to Patent Document 1). Further, an invention according to the proposal of the present applicant is known as a cutter for performing the notch processing of the scallop portions 109 and 110. (For example, see Patent Document 2)

  As shown in FIGS. 16 and 17, the scalloped cutter described above has several square tips 121 (12 in the example shown) and round tips 122 (6 in the example shown) on the outer peripheral surface of the tool body 120. It is an arrangement, and the whole cutting surface forms a mushroom shade.

JP-A-9-267210 JP-A-10-296523

  As described above, conventionally, the cutter of Patent Document 2 is attached to the groove processing apparatus of Patent Document 1 to scallop the H-section steel 103. However, this cutting process is performed under the condition that the cutting cross-sectional area is large with respect to the web 106 having a small structural strength, and it is heavy to cover several cutting edge tips, and a deceleration area must be set for feeding. It was necessary to take measures such as unavoidable. In addition, it has been pointed out that problems such as breakage of the cutting edge tip and generation of loud noise occur due to intermittent large shock and vibration during cutting.

  The present invention is intended to solve such problems of the prior art, and by providing a large number of cutting edge tips, the cutting ability is greatly improved, so that high-speed cutting can be performed. In addition, the present invention intends to provide a scalloped cutting tool in H-section steel that solves the problems of breakage of the cutting edge tip and generation of noise by cutting without impact or vibration.

In order to achieve the above-mentioned object, the scalloped cutting tool in the H-section steel according to the present invention comprises a multi-blade cutting tool composed of a disk-shaped base metal and a number of cutting edge chips attached to the outer periphery of the base metal. In addition, a large number of these multi-edged blades are superposed so that the cutting peripheral surface of the cutting edge tip forms all or part of the mushroom-shaped cutting peripheral surface as a whole. It is.

The scalloped cutting tool of the present invention is characterized in that, in claim 2, the cutting edge tip is fixed to the outer peripheral portion of the disk-shaped base metal by brazing.

The scalloped cutting tool of the present invention is characterized in that, in claim 3, the cutting edge tip is provided on the outer peripheral portion of the disk-shaped base metal in a replaceable manner.

According to a fourth aspect of the present invention, there is provided a scalloped cutting tool characterized in that the cutting edge chips adjacent in the overlapping direction are arranged so as to be displaced in the outer peripheral direction.

The scalloped cutting tool of the present invention is characterized in that, in claim 5, the thickness of the base metal and the width of the cutting edge tip are made equal.

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 ability is remarkably improved, and highly efficient cutting can be performed. In addition, the cutting load per blade can be reduced, the impact and vibration can be kept small to prevent chipping of the cutting edge tip, and at the same time, the ideal cutting process with low noise can be performed. Demonstrate.

It is a vertical side view which shows one Example of the scalloped cutting tool in the H-section steel which concerns on this invention. Similarly, it is a front view of the multi-blade cutter of the maximum diameter in FIG. Similarly, it is a front view of the multi-blade cutter of the minimum diameter in FIG. It is explanatory drawing which shows the shape of a cutting blade chip | tip. It is a front view which shows the cutter structure using the exchange-type cutting blade chip | 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 a longitudinal cross-sectional view which shows another example of attachment of a multiblade cutter. 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 vertical side view which shows 2nd Example of a scalloped cutting tool. It is explanatory drawing of a column beam junction structure. It is explanatory drawing of the conventional scalloped cutting tool. Similarly, it is a conventional explanatory diagram.

Embodiments of a scalloped cutting tool according to the present invention will be described below with reference to the drawings. In FIG. 1, 1a to 1m is a multi-blade cutter consisting of thin disk-shaped base metal 2a to 2m and cutting edge tips a to m fixed by brazing with a small arrangement pitch on the outer periphery thereof. Constitutes one processing blade A in a state where a large number (11 in the embodiment) are superposed.

The external dimensions and shapes of each of the multi-blade cutters 1a to 1m are different as shown in FIGS. 2 and 3, and the cutting peripheral surfaces drawn by the cutting edge ridges of all the cutting edge tips a to m are as shown in FIG. It is a mushroom shade shape that continues smoothly. Here, the thicknesses of the multi-blade blades 1a to 1m, that is, the base metals 2a to 2m are all the same, but of course they may be different. At this time, the widths of the cutting edge tips a to m conform to the thicknesses of the base metals 2a to 2m.

The cutting width of the cutting edge tips a to m is wider than the thickness of the base metal 2a to 2m (see FIG. 4), as in the case of a commercially available cutting saw, and each cutting edge tip a to m is adjacent in the overlapping direction. It arrange | positions corresponding to the chip pocket 3 of the base metal to perform, and it is made not to contact a base metal. Reference numeral 4 denotes a mounting hole provided in the center of each of the base metals 1a to 1m. Reference numeral 5 denotes a plurality (six in the embodiment) insertion holes provided radially from the center.

  B is a fixing means 9 for the multi-blade cutters 1a to 1m constituted by a nut cylinder 7 inserted into the insertion hole 5 at one end and a tightening screw 8 inserted from the other end so as to be screwed into the nut cylinder 7. A spindle 10 of a processing apparatus (not shown) is a fixing screw 12 for the processing blade A screwed to the spindle 9 via a washer 11, and a detent key interposed between the processing blade A and the spindle 9.

  When notching (scalloping) a H-shaped steel web with the working blade A configured as described above, a large number of cutting edge tips arranged at a fine pitch can be applied to the web. . For this reason, the cutting load per blade of the cutting edge tips a to m can be remarkably reduced, and smooth and light cutting without large vibration and impact can be performed.

  As a result, the cutting ability can be greatly improved, and the machining operation can be performed at high speed. Furthermore, there was no chipping of the cutting edge tip, and it was possible to perform cutting with durability, and the noise level could be remarkably reduced.

  In addition, when the cutting edge A of one Example mentioned above cuts the cutting-tips a to m, or when chipping occurs, the cutting edge is polished according to a conventional method, and is used for this purpose. be able to. However, this cutting tool requires a dedicated machine because the shape of the cutting edge differs from base metal to base metal, and skill is required for polishing work. 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 appropriate to adopt a throw-away tip method that allows the cutting edge tip to be replaced.

  5 and 6 show the configuration of a blade using a replaceable cutting edge tip. 23 is a lower receiving seat provided on the base metal 24 is a standing receiving seat 25 is a cutting edge tip, which has a plurality of (two in the embodiment) cutting edge ridges, Thus, any cutting edge ridge can be set at the cutting position. Reference numeral 26 denotes a tightening screw for attaching and fixing the cutting edge tip 25. When the length of the cutting edge, that is, the blade width is large, a chip cutting groove 27 is provided at the center.

FIG. 7 shows a blade structure when the thickness of the base metal 32 is small and the width of the cutting edge tip 35 is small accordingly. Reference numeral 33 denotes a lower receiving seat 34 provided on the base 32, and a standing receiving seat 36 is an elastic pinching piece provided corresponding to the lower receiving seat 33 and the standing receiving seat 34. The cutting edge tip 35 is a self-restraining type held by the above-mentioned seat and the pressing piece.

  1 to 3 described above, a large number of multi-blade cutters 1a to 1m are combined into a single block by the fixing means B, and the block-shaped cutting blade A is attached to the spindle 9. It is what was attached. A key member is provided as a means for preventing the processing blade A from rotating.

  FIG. 8 shows another embodiment for attaching the machining tool A to the spindle 49. That is, reference numeral 41 denotes a large-diameter flange 43 provided on the spindle 49, an insertion hole 44 provided in each base metal (not shown), and a fastening screw that is screwed into the female screw portion of the flange 41 through the insertion hole 43. In the case of such a configuration, it is possible to simplify the configuration without the need for a means for fixing the spindle end and a means for preventing rotation by the key member.

  In the case of the above-described embodiment, the flange 41 protrudes from the outer peripheral portion of the spindle 49, and there is a possibility of interfering with the flange in the H-shaped steel during the cutting process. However, this can be solved by increasing the overall diameter of the working blade A. As described above, when the processing blade is made large, the number of cutting blade tips can be further increased and the arrangement conditions of adjacent cutting blade tips can be relaxed.

  Moreover, in each Example demonstrated above, the width | variety (for example, a) of a cutting blade chip | tip is set large with respect to the thickness of a base metal (for example, 2a) so that a general blade may be. For this reason, there is a restriction that the cutting edge tip a of the base metal 1a must be released into the chip pocket 3 of the adjacent base metal 2b between the adjacent multi-blade tools (for example, 1a and 1b).

  The embodiment shown in FIG. 9 eliminates the above-mentioned problem of the interference of the cutting edge tip so that the cutting edge tip can be arranged at a free position. 51 is a base metal 52 is a cutting edge chip, and the thickness and width (w1, w2) of both are the same. And this makes it possible to arrange adjacent cutting edge tips at the same position or slightly shifted. (Refer to FIG. 10) According to the above configuration, the chip pocket can be communicated laterally, and the chip discharge performance can be improved.

Setting the thickness of the base metal and the blade width of the cutting edge tip 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. 11 and 12, the cutting edge tip 62 is fixed to the base metal 61 located adjacent in the stacking direction with a screw 63. 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 61 is flattened, or a concave surface for contact is provided on the side surface of the base metal 61. That's fine.

Also, as in the embodiment shown in FIG. 4, many cutting edge tips attached to one base metal (for example, 2e) all had the same shape of cutting edge, but different cutting edge edges as shown in FIG. It can also be a combination of things with. Thus, by sharing the amount of cutting by each of the cutting edge tips e1 to e3, it is possible to further reduce the impact and vibration.

  In addition, when the structure of the web in H-section steel is seen, it has sufficient rigidity strength in the joint part vicinity with the flange. Therefore, processing may be performed using a conventional cutter in the vicinity of the joint, and only the remaining portion may be cut using the multi-blade tool according to the present invention.

FIG. 14 shows the above-described embodiment, and C is a cutter blade in which a round chip 201 is attached to the outer peripheral portion of a disk-shaped base metal 200. Other parts are the same as those of the first embodiment. Incidentally, the same parts are indicated by the same reference numerals as those described above, and redundant description is omitted.

A Cutting blade 1a ~ 1m Circular saw blade 2a ~ 2m
a to m Cutting edge tip 4 Mounting hole 5 Insertion hole B Fixing means 7 Nut cylinder 8 Tightening screw 9 Spindle 10 Fixing screw 11 Washer 12 Locking key 22 Base metal 23 Lower receiving seat 24 Standing receiving seat 25 Cutting tip 26 Tightening Attached screw 32 Base metal 33 Lower receiving seat 34 Standing seat 35 Cutting blade tip 36 Elastic pinching piece 41 Flange 43 Insertion hole 44 Tightening screw 49 Spindle 51 Base metal 52 Cutting blade tip 61 Base metal 62 Cutting blade tip 63 Screw

Claims (5)

A multi-blade is composed of a disk-shaped base metal and a large number of cutting blade tips attached to the outer periphery of the base metal, and the cutting peripheral surface of the cutting edge chip is formed by stacking a large number of these multi-bladed blades. A scalloped cutting tool in H-section steel, characterized in that it forms all or part of the mushroom-shaded cutting peripheral surface as a whole. The scalloped cutting tool in H-section steel according to claim 1, wherein the cutting edge tip is fixed by brazing to the outer peripheral portion of the disk-shaped base metal. The scalloped cutting tool for H-shaped steel according to claim 1, wherein a cutting edge tip is provided on the outer periphery of the disc-shaped base metal so as to be exchangeable. 2. The scalloped cutting tool for H-section steel according to claim 1, wherein adjacent cutting edge chips are arranged in the outer peripheral direction in the overlapping direction of the multi-blade cutting tool. 2. The scalloped cutting tool in H-section steel according to claim 1, wherein the thickness of the base metal and the width of the cutting edge tip are made equal.