JPH0144444B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary processing tool, and more particularly to a rotary processing tool called a slitter knife or side trimmer cutter for shearing steel plates, paper, etc.

In conventional Giyoung-type slitters or side trimmers, which are assembled with a number of slitter knives arranged side by side on a drive shaft, a spacer ring is installed between the blades to determine the slitting width. For this reason, the types and quantities of spacers are large, and a large amount of manufacturing and management costs are required. Furthermore, in order to improve the properties of the sheared surface, it is necessary to strictly maintain the accuracy of the slitter knife itself within a predetermined range. The spacer also requires high precision, and it is necessary to maintain not only various dimensions but also the parallelism of the finished plane with high precision, and to minimize the inclination of the cutting edge, clearance, and cumulative pitch error. However, not only is it quite difficult to completely implement these precision controls, but even if high-precision tools are provided, their functions cannot be fully demonstrated, which is the current situation.

The present invention helps solve this type of problem that occurs with conventional slitting knives.

The object of the present invention is to provide a tool such as a slitter knife that can be mounted at a desired position on a rotation axis without requiring a high degree of precision in the rotation processing tool itself, and without requiring a spacer member for positioning. The objective is to obtain a rotary processing tool.

According to the present invention, a ring-shaped cutting edge made of a highly wear-resistant material such as high-speed steel, cemented carbide, or ceramics is attached to the outer periphery, and the ring-shaped cutting edge is attached to the outer periphery and has a bore fitted into the outer periphery of the drive shaft. It has the shape of a thick-walled tube of a predetermined size formed between a base metal, a cylindrical recess of a predetermined size that is coaxial with the drive shaft, and the bore of the base metal is bored into the wall surface, and the outer periphery of the drive shaft. a shrink ring fixed to the base metal, the shrink ring having a tubular portion extending into the cavity and fitting around the outer periphery of the drive shaft; an inner surface of a cylindrical recess in the base metal; and an outer diameter smaller than the inner diameter of the cylindrical recess. an oil chamber consisting of a tubular cavity coaxial with the drive shaft formed between the outer periphery of a tubular portion of a shrink ring having an adjustable piston fitted into each of one or more oil passages opening on the outer surface of the metal body and pressurizing the oil in the oil chamber; A rotating machining tool characterized by having a thick rib in the center is obtained.

Now, an embodiment of the apparatus of the present invention will be described below with reference to the accompanying drawings.

Figures 1 and 2 show the conventional slitter made in one piece.
The knife 13 is a disk having a bore 14 in the center and a cutting edge made of a highly wear-resistant material such as high-speed steel, cemented carbide, or ceramics. As shown in FIG. 3, a plurality of slitter knives 13 are fitted around the outer periphery of a drive shaft 15 of the slitter, and a spacer 16 is arranged between two adjacent slitter knives 13, 13, so that the slitter knives 13 can be used individually. The slitter knife 13 is positioned on the rotating shaft 15. As described above, the conventional slitter knife 13 using the spacer 16 has problems such as requiring high precision in manufacturing both and requiring a large number of different types of spacers 16.

FIG. 4 shows the first group of slitter knives 13a, 13b, 13 attached to the drive shaft 15 in FIG.
c, 13d... and these slitters, respectively.
a second group of slitter knives 13a', 13b', 13c', 13 located opposite the knives and mounted on the second drive shaft 15' and cooperating with the first group;
This shows the configuration of a slitter machine consisting of d′...

As shown in FIG. 5, the device 10 of the present invention includes an integrally made base metal 12 having an annular cutting edge 2 made of a highly wear-resistant material such as high-speed steel, cemented carbide, or ceramics attached to the outer periphery. We are prepared. The cutting edge 2 and the base metal 1 may be manufactured separately, and the cutting edge 2 may be bolted to the base metal 1. The base metal 12 is provided with a bore 14 in the center, as is customary. A cylindrical recess 17 having a diameter D larger than the diameter of the bore 14 is further carved in the bore 14 of the base metal 12 .

Therefore, when the base metal 12 is fitted into the drive shaft 15, a cavity having the shape of a thick-walled tube with predetermined dimensions is formed between the cylindrical wall of the recess 17 and the outer periphery of the drive shaft 15. The contraction ring 3 includes a tubular body portion 3B that extends into the cavity, and a flange portion 3F that is fitted into a recess 18 provided on the right end face of the base metal 12. Shrinkage ring 3 has multiple bolts 4
It is fixed to the base metal 12 by. The outer diameter d ₁ of the tubular body portion 3B of the shrink ring 3 is made smaller than the inner diameter D of the recess 17 bored in the wall of the bore 14 of the base metal 12, and the inner surface of the recess 17 and the tubular body portion of the shrink ring 3 A tubular cavity is formed between the body portion 3B and the outer periphery of the body portion 3B. This cavity becomes the oil chamber 6 of the present invention. One or several oil passages 7 are bored in the base metal 12 in the radial direction, and each oil passage 7 has an inner end communicating with the oil passage 6 and an outer end opening at the outer periphery of the base metal 12. A piston 8 is slidably fitted into each oil passage 7, and each piston 8 is screwed into the respective oil passage 7 in an adjustable manner by a male thread 9 carved at a position adjacent to the outer end of the piston 8. It is rare. The oil chamber 6 and each oil passage 7 are filled with appropriate pressure oil. Each piston 8 has an O-ring 11c attached to a groove 19C provided on its outer periphery. Also, the bore portion 14 of the base metal 12
O-rings 11A are provided between the left end of the recess 17 provided in the recess 17 and the left end of the shrink ring 3, and between the shoulder portion of the right end of the recess 17 and the flange portion 3F of the shrink ring 3, respectively. 11B is installed. The tubular body portion 3B of the shrink ring 3 is provided with a thick rib 5 approximately at the center of its axial length, strengthening the tubular body portion against bending stress. By pressurizing the oil in the oil chamber 6, the slitter knife 10 is held in a desired position on the drive shaft 15.

FIG. 6 shows a simplified embodiment of the oil chamber 6, in which the inner diameter D of the cylindrical recess 17 bored into the bore 14 of the alloy 12 is simply the outer diameter d of the tubular body portion 3B of the contraction ring 3. Oil chamber 6 by making it larger than ₁
is formed. Therefore, it is not necessary to particularly carve grooves on the wall of the recess 17 or on the outer periphery of the tubular body portion 3B. O-ring 11A, 11B, 11C
The arrangement is the same as in FIG.

FIG. 7 shows a modification of the embodiment shown in FIG. 6, in which the tubular body portion 3B and the flange portion 3 of the shrink ring 3 are
A flange portion 3F is abutted against the right end of the tubular body portion 3B, and an O-ring 11D is inserted into the joint surface between the two. Such a structure facilitates the manufacture of the contraction flange 3 and reduces manufacturing costs.

As described above, the structure of the oil chamber installed inside the base metal according to the present invention is simplified, and the tubular body portion 3B of the contraction flange is strengthened against bending stress.

Additional Relationships The rotary processing tool of the present invention simplifies the structure of the oil chamber installed inside the base metal, and strengthens the tubular body portion of the contraction ring fitted into the bore of the base metal (Patent No. 1508231). This is an improvement on the invention of Japanese Patent Publication No. 63-55404).

[Brief explanation of drawings]

Fig. 1 is a plan view showing a conventional slitter knife, Fig. 2 is a sectional view taken along the line - in Fig. 1, and Fig. 3 is a sectional view showing the installation of the drive shaft of the slitter knife in Fig. 1. , FIG. 4 is a schematic diagram showing a slitter machine equipped with the slitter knife of FIG. 1, FIG. 5 is a cross section showing an embodiment of the apparatus of the invention, and FIG. 6 is a modification of the embodiment of FIG. 5. FIG. 7 is a cross-sectional view showing another modification of the embodiment shown in FIG. 1...Base metal, 2...Blade tip, 3...Shrink ring,
4... Bolt, 5... Thick rib, 6... Oil chamber, 7
...Oil passage, 8... Piston, 9... Hey, 10...
...Apparatus of the present invention, 11A, 11B, 11C...
O-ring, 12...Integrated base metal and cutting edge,
13... Conventional slitter knife, 14... Bore, 15... Drive shaft, 16... Spacer, 17
... Recess in the base metal bore part, 18 ... Recess, 19
A, 19B, 19C...Concave groove.

Claims (1)

[Claims] 1 An annular base metal with a cutting edge made of a highly wear-resistant material such as high-speed steel, cemented carbide, or ceramics attached to the outer periphery and a bore in the center that is fitted into the outer periphery of the drive shaft. ), and has the shape of a thick-walled tube of a predetermined size formed between a cylindrical recess of a predetermined size that is bored in the wall surface of the bore of the base metal and coaxial with the drive shaft, and the outer periphery of the drive shaft. a shrink ring fixed to the base metal, the shrink ring having a tubular portion extending into the cavity and fitting around the outer periphery of the drive shaft; an inner surface of a cylindrical recess in the base metal; and an outer diameter smaller than the inner diameter of the cylindrical recess. an oil chamber consisting of a tubular cavity coaxial with the drive shaft formed between the outer periphery of a tubular portion of a shrink ring having an adjustable piston fitted into each of one or more oil passages opening on the outer surface of the metal body and pressurizing the oil in the oil chamber; A rotary processing tool characterized by a thick rib in the center.