JPH035379Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Field of Industrial Use" This invention relates to rotary processing tools such as Giyoung-type slitting knives and side trimmer knives for shearing paper, steel plates, etc.

``Prior Art'' As shown in Fig. 8 A and B, a conventional Giyoung type slitting knife is constructed of an integrally molded piece of cemented carbide or alloy tool steel, and the outer circumferential portion of this slitting knife 3 is used as. As shown in FIG. 9, the slitter knife 3 is fitted into the shaft 1 of the slitter device in multiple stages alternately with spacer rings 2, and is fastened and fixed with a tightening nut or the like. Then, the sheet material is cut by a combination of the upper slitting knife 3 and the lower slitting knife 3 (indicated by the two-dot chain line in FIG. 9).

Further, a shrinkable sleeve is provided between the slitting knife 3 and the shaft 2, and grooves and recesses are formed in a ring shape in the circumferential direction on the outer periphery of the shrinking sleeve, and the grooves and recesses are connected to the inner circumferential surface of the slitting knife 3. A system has also been developed in which the slitting knife 3 is fixed at an arbitrary position on the shaft 2 by reducing the diameter of the contraction sleeve by adjusting the pressure of the hydraulic chamber thus formed.

"Problems to be Solved by the Invention" By the way, the above-mentioned conventional Guyang type slitting knife 3 is used by being attached to the shaft 1 of a slitting device, but in this case, there are various drawbacks as shown below.

In the slitting device, a spacer ring 2 is placed between each slitting knife 3 in order to set the slitting width. As a result,
When replacing the slitting knife 3 or changing the slitting width,
Both the slitting knife 3 and the spacer ring 2 had to be removed from the shaft 1, and therefore, the work of replacing the slitting knife 3 and changing the slitting width was extremely complicated.

The clearance (distance) between the shaft 1 and the slitting knife 3 of the slitting device is generally
It is only about 0.005 to 0.015 mm, and therefore, skill is required to replace the slitting knife 3.

In order to enable the slitting width of the slitting device to be set in various ways, many types of spacer rings 2 are required, and as the types and quantities of spacer rings 2 increase, the cost of managing and manufacturing the spacer rings 2 increases. It was increasing.

A slitting device usually incorporates several dozen slitting knives 3 and spacer rings 2, but in order to maintain good slitting accuracy and shearing surface, the slitting knives 3 must be set with high precision (for example, thickness accuracy within 0.005 mm, flatness (parallelism within 0.005 mm, inner diameter difference within 0.01 mm, etc.), and this accuracy must be maintained, which increases manufacturing costs and complicates maintenance management. was.

In the slitting device, the slitting knife 3
The replacement of the slitting knife and the changing of the slitting width are often carried out.
When the slitting knife 3 is attached to or removed from the shaft 1, scratches and wear occur on the outer peripheral surface of the shaft 1 because the slitting knife 3 is highly hard.

The spacer ring 2 must also be manufactured and managed with a precision higher than that of the slitting knife 3 described above. This is because in order to maintain a good shearing surface, it is necessary to maintain a certain clearance between the upper and lower slitting knives 3, and in order to maintain this clearance, it is necessary to This is because it is necessary to minimize the deflection and cumulative pitch error.

Furthermore, in the case of a shrinkable sleeve that forms a hydraulic chamber with a ring-shaped groove, etc., the entire outer circumferential surface of the shrinkable sleeve is reduced in diameter due to the increase in pressure in the hydraulic chamber. The shortcoming is that the connection between the cutter and the cutter body is not strong. Moreover, over the entire circumference of the shrink sleeve,
Since a ring-shaped groove, etc. is formed, if a key groove, etc. is formed on the circumferential surface of the shaft, the inner circumferential surface of the shrinkable sleeve will dig into the corner of the key groove.
The inner surface of the shrink sleeve may be scratched or damaged.

Therefore, it is not possible to firmly connect the shrink sleeve and the shaft.

This invention was made in view of the above-mentioned circumstances, and after eliminating all the various drawbacks mentioned above, it is possible to easily attach and remove the device from the shaft, and to set the attachment position to the shaft arbitrarily. It is an object of the present invention to provide a rotary processing tool which can connect a cutter body to a shaft firmly and without causing misalignment.

``Means for Solving the Problems'' This invention provides an annular cutter body and an inner circumferential surface of the cutter body in an annular rotary processing tool such as a slitting knife or side trimmer cutter that is used by being fitted onto a shaft. a shrinkable sleeve that is attached in a fitted state and through which the shaft is inserted; a plurality of recesses are formed at equal intervals in the circumferential direction on the outer peripheral surface of the shrinkable sleeve; A communication hole communicating with a hydraulic chamber defined by the inner circumferential surface of the cutter body and the recess of the contraction sleeve is formed, and the communication hole has a pressure of hydraulic oil filled in the hydraulic chamber. It is equipped with a piston that adjusts the

"Operation" When the pressure of the hydraulic oil in each hydraulic chamber is increased, the inner circumferential surface of the shrinkable sleeve corresponding to each recess is displaced radially inward and presses against the outer circumferential surface of the shaft. Since the outer circumferential surface of the shrinkable sleeve between each recess is displaced radially outward, the shrinkable sleeve and the shaft can be firmly connected, and the shrinkable sleeve and the cutter body can also be firmly connected. , the cutter body is firmly fixed to the shaft. Furthermore, since the positions of the shrink sleeve change at equal intervals in the circumferential direction, misalignment between the shaft and the cutter body is also prevented. Furthermore, if there is a keyway on the outer circumferential surface of the shaft, the shrinkable sleeve can be installed so that the recess does not overlap with the keyway, so the inner circumferential surface of the shrinkable sleeve will not bite into the corner of the keyway. It is possible to avoid scratching or damaging the inner circumferential surface.

"Embodiments" Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the structure of a slitting knife 5 according to an embodiment of this invention. In this diagram,
Reference numeral 10 denotes a cutter body consisting of an annular base portion 10a and a cutting edge portion 10b extending in the outer circumferential direction from the base portion 10a, and the cutter body 10 is made of alloy tool steel,
It is integrally constructed of powdered high-speed steel or cemented carbide. Further, reference numeral 12 denotes a shrinkable sleeve consisting of a cylindrical portion 12a and a flange portion 12b, and this shrinkable sleeve 12 is fitted into a recess 10c formed on the inner peripheral surface of the cutter body 10, and a plurality of bolts 13, 13 It is fixed by... The inner diameter of this contraction sleeve 12 is slightly larger than the diameter of the shaft 1 (see FIG. 3) of the slitter device to which the slitter knife 5 according to this embodiment is attached. Further, on the outer peripheral surface of the cylindrical portion 12a of the shrinkable sleeve 12, as shown in FIG.
A hydraulic chamber 14 is formed between these recesses 12c and the inner peripheral surface of the base 10a of the cutter body 10. The number of hydraulic chambers 14 is not limited to three, and may be two or four or more.

On the other hand, a communication hole 16 is formed in the base 10a of the cutter main body 10 and extends to the hydraulic chamber 14 by opening its outer peripheral surface, and a female screw 16a is formed near the opening of the communication hole 16. This communication hole 16
A piston 18 is slidably inserted into the holder, and an adjusting screw 20 that engages with the female screw 16a is screwed into the holder. The hydraulic chamber 14 is filled with hydraulic oil, and by screwing in the adjustment screw 20, the pressure of the hydraulic oil in the hydraulic chamber 14 is increased.
Conversely, by loosening the adjustment screw 20, the pressure can be lowered. In this way, by adjusting the pressure of the hydraulic oil in the hydraulic chamber 14, the amount of contraction of the contraction sleeve 12 can be adjusted. In addition, the cutter body 10 and the shrink sleeve 1
2, there are O-rings 21 and 22 to prevent liquid leakage.
Further, a recess 18a is formed at the end of the piston 18, and an O-ring 23 for preventing liquid leakage is fitted into this recess 18a. The pressure within the hydraulic chamber 14 is maintained over time.

Here, the communication hole 16 is provided at one or more locations depending on the size of the cutter body 10, the number of hydraulic chambers 14, and the amount of contraction of the contraction sleeve 12. The communication holes 16 are provided respectively.

When the slitting knife 5 configured as described above is attached to the shaft 1 of the slitting device, first, the adjusting screw 20 is loosened to sufficiently lower the pressure of the hydraulic oil in the hydraulic chamber 14. In this state, as shown in FIG. 3, the slitter knife 5 is set at a desired position on the shaft 1, and the adjusting screw 20 is then screwed in to increase the pressure of the hydraulic fluid in the hydraulic chamber 14.
As the pressure of the hydraulic oil in each hydraulic chamber 14 increases, the inner circumferential surface of the contraction sleeve 12 corresponding to each recess 12c is displaced radially inward and comes into pressure contact with the outer circumferential surface of the shaft 1. Due to the reaction at that time, the outer circumferential surface of the contraction sleeve 12 between the respective recesses is displaced radially outward and comes into pressure contact with the recess 10c of the cutter body 10. In this way, loosen the adjustment screw 20,
The slitting knife 5 can be attached to any position on the shaft 1 simply by screwing it in.

Next, other embodiments of this invention will be described with reference to FIGS. 4 to 7.

4 and 5 show the base 1 of the cutter body 10.
A case is shown in which the blade 0a and the cutting edge portion 10b are constructed separately. In the embodiment shown in FIG. 4, the cutting edge portion 10b is attached to the base portion 10a with bolts 25. Further, in the embodiment shown in FIG.
a and the flange portion 12b of the shrinkable sleeve 12, and is tightened with a bolt 26. This bolt 26 is the bolt 13 shown in FIG.
It also has the function of According to these examples:
When the cutting edge portion 10b becomes worn and needs to be replaced, it is possible to replace only this cutting edge portion 10b with a new one.

Moreover, FIG. 6 shows a case where the cutter body 10 and the shrinkable sleeve 12 are fixed by welding,
In the figure, 30 is a welded part. Furthermore, the seventh
The figure shows a case in which the cutter body 10 and the shrinkable sleeve 12 are fixed by shrink fitting, and in the figure, 31 indicates a portion that has been shrink fit.

"Effects of the Invention" As explained above, according to this invention, in an annular rotary processing tool such as a slitting knife or a side trimmer cutter that is used by being fitted onto a shaft, a ring-shaped cutter body and an inner part of the cutter body are provided. a shrinkable sleeve that is fitted and attached to a circumferential surface and through which the shaft is inserted; a plurality of recesses are formed at equal intervals in the circumferential direction on the outer circumferential surface of the shrinkable sleeve; The main body is formed with a communication hole that communicates with a hydraulic chamber defined by the inner circumferential surface of the cutter main body and the recess of the contraction sleeve, and the communication hole is filled with an actuator filled in the hydraulic chamber. Since it is equipped with a piston that adjusts the oil pressure, the rotary processing tool can be easily installed at any position on the shaft simply by adjusting the fluid pressure in the hydraulic chamber with the piston. As a result, the following effects can be obtained.

The slitting width can be arbitrarily set without relying on the spacer ring, which eliminates the need to take the spacer ring in and out, and shortens the setting work.

It is also possible to easily adjust the clearance between the rotary processing tools (slitting knives) as the thickness of the sheet material to be cut changes.

Since a spacer ring is no longer required, the manufacturing and maintenance costs for spacer rings, which were conventionally necessary, are no longer required, and thereby the costs associated with the use of rotary processing tools are significantly reduced.

The clearance between the rotary processing tool and the shaft on which this tool is attached is 0.005 to 0.015 compared to the conventional one.
mm to 0.015 to 0.03 mm.As a result, even unskilled personnel can perform tool replacement work, and it is also possible to use an automatic attachment/detachment device for tool replacement, reducing the time required for replacement work. is planned.

When the pressure of the hydraulic fluid in each hydraulic chamber is increased, the inner peripheral surface of the shrinkable sleeve corresponding to each recess is displaced radially inward and pressed against the outer peripheral surface of the shaft. Since the outer periphery of the shrinkable sleeve is displaced radially outward, the shrinkable sleeve and the shaft can be firmly connected, and the shrinkable sleeve and the cutter body can be firmly connected, which is a remarkable effect. .

Moreover, since the recesses are formed at equal intervals in the circumferential direction of the shrinkable sleeve, misalignment between the cutter body and the shaft can be prevented.

Furthermore, if there is a keyway on the outer circumferential surface of the shaft, for example, the shrinkable sleeve can be installed so that the concave part of the shrinkable sleeve does not overlap with this keyway, so that the inner circumferential surface of the shrinkable sleeve is located at the corner of the keyway. It is possible to avoid scratches or damage to the inner circumferential surface due to digging in.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the configuration of an embodiment of this invention, Fig. 2 is a sectional view illustrating the position of the hydraulic chamber 14 in the embodiment, and Fig. 3 shows a slitting knife 5 according to the embodiment on the shaft. 1. FIGS. 4 to 7 are sectional views showing the configuration of other embodiments of the present invention.
Figures A and B are a front view and a side sectional view showing the structure of a conventional slitter knife, and FIG. 9 is a partial sectional view showing the structure when the conventional slitter knife is attached to a shaft. 5...Suritsuta knife, 10...Katsuta body,
10a...Base, 10b...Blade tip, 12...Shrinkable sleeve, 14...Hydraulic chamber, 16...Communication hole,
18...Piston, 20...Adjustment screw.

Claims (1)

[Claims for Utility Model Registration] In an annular rotary processing tool such as a slitting knife or side trimmer cutter that is used by being fitted onto a shaft, the tool is attached to an annular cutter body and fitted into the inner circumferential surface of the cutter body. a contraction sleeve into which the shaft is inserted; a plurality of recesses are formed at equal intervals in the circumferential direction on the outer peripheral surface of the contraction sleeve; A communication hole communicating with the hydraulic chamber defined by the circumferential surface and the recess of the contraction sleeve is formed, and the communication hole is provided with a piston that adjusts the pressure of the hydraulic oil filled in the hydraulic chamber. A rotary processing tool characterized by: