JP2012106315A - Cutting blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that a large impact and vibration are generated in cutting work with a blade used in conventional grooving, and a cutting edge tip is chipped and worn significantly, thus resulting in an extremely short blade life, and to solve a problem of loud noise or the like to improve a work environment.SOLUTION: Multiple blades 1a-1k are constituted of disc-like base metals 2a-2k and many cutting edge tips 3 attached at outer peripheral parts of the base metals 2a-2k. When many of the multiple blades 1a-1k are overlapped, a cutting circumferential face drawn by a cutting edge ridge 3a of the cutting edge tip 3 is formed in a required worked circumferential surface shape as a whole. A reinforced part 6 which is connected to an end of the cutting edge ridge and protrudes in a region which is not involved in the cutting work is formed at the end of the cutting edge ridge 3a of the cutting edge tip 3.

Description

  The present invention relates to a cutting tool for performing groove processing such as flanges in H-section steel.

  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, 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.

  In addition, in the bracket structure in the case where the above-described steel frame joint portion 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, but the long H shape In the case of welding directly on site using steel as a beam material, there is a case in which one groove portion has an inclined surface facing inward from the viewpoint of securing a work in a downward posture.

  Furthermore, in recent years, there are many fabricators that implement a scalloped part, that is, a non-scalloped non-scalloped construction method on the web from the lessons learned from the previous earthquake disaster. The column beam connection structure in this non-scallop method is as shown in FIG. 8, and it is necessary to process the groove portion 109 at the end of the flange.

  By the way, the invention according to the proposal of the present applicant is known as a mechanical device that performs groove processing on the flanges 104 and 105 and scallop processing on the web 106 in the H-shaped steel. (For example, refer to Patent Document 1). The groove processing is performed after the follow-up processing of the flange. As a cutter used for the cutting processing, for example, the inventions disclosed in Patent Document 2 and Patent Document 3 are used for scallop processing. As the cutter to be used, for example, the invention disclosed in Patent Document 4 is known.

  Among the above, the follow-up cutter is one in which several triangular tips 71 are arranged on the outer peripheral surface of the tool body 70 as shown in FIGS. 9 and 10, and the entire cutting peripheral surface drawn by the cutting edge is cylindrical. It has a shape. Further, as shown in FIGS. 11 and 12, the groove processing cutter has a plurality of triangular tips 81 arranged on the outer peripheral surface of the tool body 80, and the entire cutting peripheral surface drawn by the cutting edge is a wharf. Conical shape. Further, the scalloped cutter is formed by arranging several square tips 91 and round tips 92 on the outer peripheral surface of the tool body 90 as shown in FIGS. 13 and 14, and the entire cutting peripheral surface drawn by the cutting edge ridge is formed. It has a mushroom cap shape.

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

  As described above, conventionally, the required cutting process is performed by attaching the cutters of Patent Literatures 2 to 4 to the mechanical device of Patent Literature 1. However, this cutting process requires high-speed feed for a large cutting cross-sectional area, and several cutting edge tips are burdensome to cover this, causing large impact and vibration, resulting in cutting. It was often seen that the blade tip was lost. In addition, noise was severe and improvements were also required in terms of work environment.

In order to solve the above-mentioned problems, a cutting tool according to the present invention comprises a multi-blade cutter comprising a disk-shaped base metal and a large number of cutting edge chips attached to the outer periphery of the base metal. By superposing a large number of blades, the cutting peripheral surface drawn by the cutting edge of the cutting blade tip as a whole forms the required processing peripheral surface shape, and the edge of the cutting edge of the cutting blade tip. Further, a reinforcing portion that is connected to the end portion and protrudes into a region not involved in the cutting process is provided.

  In addition, the cutting edge tip in the cutting tool of the present invention is fixed to the side surface portion of the base metal with a tightening screw, and this cutting edge tip is supported by a seat provided on the adjacent base metal. It is characterized by the fact that it has been designed to be subjected to detent measures.

Further, the cutting edge tip in the cutting tool of the present invention is characterized in that it has a quadrilateral shape having at least two cutting edge ridges.

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, problems such as chipping of the cutting edge chip and generation of noise can be reasonably solved. Moreover, the outstanding effect that the highly efficient cutting by the improvement of cutting ability can be performed is exhibited.

Further, the reinforcing portion can prevent chipping and wear of the edge of the cutting edge of the cutting edge tip. For this reason, the blade edge life is significantly extended, and high-precision cutting can be maintained for a long time.

It is a vertical side view which shows one Example of the cutting tool which concerns on this invention. Similarly, it is a front view. It is a vertical side view which expands and shows a blade edge | tip structure. It is a front view which shows the structure of a 1st multi-blade cutter. It is a front view which shows the structure of a 2nd multi-blade cutter. It is a perspective view which shows the structure of a cutting blade chip | tip. It is explanatory drawing of a column beam junction structure. It is explanatory drawing which shows the groove shape by a non-scallop method. It is a side view which shows the structure of the conventional follow-up process cutter. Similarly, it is a front view. It is a side view which shows the structure of the conventional groove processing cutter. Similarly, it is a front view. It is a side view which shows the structure of the conventional scallop processing cutter. Similarly, it is a front view.

Hereinafter, an embodiment of a cutting tool according to the present invention will be described by applying it to a groove working tool. In the figure, 1a to 1k are thin disk-shaped base metals 2a to 2k, and first to eleventh multi-blade knives composed of a large number of cutting blade tips 3 arranged on the outer periphery thereof. One cutting tool A is configured in a state where a large number (11 in the embodiment) are superposed. Reference numeral 4 denotes a mounting round hole provided in the center of the base metal 2a to 2k (see FIG. 2). Reference numeral 5 denotes a key groove provided in the round hole 4.

The first to eleventh multi-blade knives 1a to 1k are arranged with gradually decreasing diameters, and the cutting edge ridge 3a is inclined by using the same shape of the cutting edge tip 3. The cutting peripheral surface drawn by all the cutting edge ridges 3a has a smoothly continuous truncated cone shape. The cutting edge tip 3 has a trapezoidal block shape as a whole as shown in FIG. 6 and forms cutting edge ridges 3a on four sides thereof. Note that the cutting edge ridge 3a that can be used when the cutting edge tip 3 is turned into two sides.

Reference numeral 6 denotes a reinforcing portion 7 which is connected to one end portion (corner portion) of the cutting edge ridge 3 a of the cutting edge tip and protrudes from a region not involved in the cutting process. Further, the above-mentioned cutting edge tip 3 is attached and fixed to the side surfaces of the base metals 2a to 2k with a fastening screw 8. (Refer FIG. 3) 9 is the escape groove of the reinforcement part 6 provided in base metal 2a-2k. The reinforcing part 6 may have a shape in which two reinforcing parts are continuous.

10 is a recessed receiving seat (see FIG. 5) provided on the outer peripheries of the base metals 2a to 2k (see FIG. 5). The receiving seat 10 includes an adjacent multi-blade cutter (first in the case of the second multi-blade cutter 1b). In the case of the third multi-blade cutter 1a, and in the case of the third multi-blade cutter 1c, the cutting tip 3 of the second multi-blade cutter 1b is closely fitted and supported. To prevent rotation. Reference numeral 11 denotes a chip pocket provided at a front position continuously from the receiving seat 11.

  Next, 20 is a hollow-shaft adapter shaft in which a fastening flange 21 is screwed at one end and a tightening nut 22 is screwed into the other end. The blade knives 1a to 1k are mounted and attached and fixed in an overlapped state. The adapter shaft 20 and the multi-blade blades 1a to 1k are prevented from rotating by a key member (not shown).

  Reference numeral 30 denotes a spindle of a groove processing apparatus (not shown). Reference numeral 31 denotes a mounting portion 32 of the adapter shaft 20 provided at the tip of the spindle 30. Reference numeral 32 denotes a fixing screw for fixing the adapter shaft 20 to the spindle 30 via a washer member 33. The adapter shaft 20 and the multi-blade cutters 1a to 1k are prevented from rotating by key means (not shown).

  For example, when performing groove processing on a flange of an H-shaped steel with the cutting tool A configured as described above, a large number of cutting edge tips 3 arranged at a fine pitch can be applied to the flange. For this reason, the cutting load per blade of the cutting edge tip 3 can be remarkably reduced, and smooth and light cutting without large vibrations and impacts can be performed.

  In the present invention, since the reinforcing portion 6 is provided on the cutting edge 3a of the cutting edge tip 3, there is no chipping at the end during the cutting process, and there is no wear, and the tool life can be dramatically improved. This makes it possible to perform highly accurate cutting work with durability. Furthermore, it is possible to perform machining operations at a high feed rate, reduce the noise level, and obtain a healthy working environment.

  In the above embodiment, the present invention is applied to a beveled cutting tool having a truncated cone shape that is inclined and has a linear cutting edge, but is flat and linear. Can be easily applied within the scope of the design change even in this shaded scalloped cutting tool with an inclined and curved cutting edge ridge. It is.

In the embodiment of the present invention, this cutting tool is applied to the groove processing of H-shaped steel. However, it is used for plate-shaped groove processing or for rectangular groove processing of square steel pipes. It goes without saying that it can be used.

A Cutting blade 1a to 1k Multi-blade blade 2a to 2k Base metal 3 Cutting edge tip 3a Cutting edge 4 Round hole 6 Reinforcement part 8 Tightening screw 9 Relief part 20 Adapter shaft 30 Spindle

Claims (3)

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. The cutting peripheral surface to be drawn has a required processing peripheral surface shape as a whole, and is connected to the end portion of the cutting edge of the cutting edge tip and protrudes into an area not involved in the cutting processing. A cutting tool characterized by providing a reinforcing part to be cut.   The cutting edge tip is attached and fixed to the side surface of the base metal with a tightening screw. Further, the cutting edge tip is supported by a receiving seat provided on the adjacent base metal so that it is prevented from rotating. The cutting tool according to claim 1, wherein the cutting tool is a knives. The cutting blade according to claim 2, wherein the cutting edge tip has a quadrilateral shape having at least two cutting edge ridges.