JPH0644627Y2 - Rotary machining tool - Google Patents

Description

[Detailed Description of the Invention] "Industrial application field" The present invention relates to a rotary processing tool such as a gang type slitter knife or a side trimmer cutter for shearing paper or a steel plate.

“Prior Art” As shown in FIGS. 8 (a) and 8 (b), a conventional gang type slitter knife is formed of an integrally molded product of cemented carbide or alloy tool steel. The part is used as a cutting edge. As shown in FIG. 9, the slitter knife 3 is fitted into the shaft 1 of the slitter device alternately with the spacer rings 2 in a plurality of stages, and is fixed by tightening a tightening nut or the like. Then, the upper slitter knife 3 and the lower slitter knife 3 (9th
The sheet material is cut by a combination of (indicated by a two-dot chain line in the figure).

However, in such a configuration, the work such as spacer replacement for changing the slitting width is complicated, and the slitter knife, the spacer, and the like must be manufactured with high accuracy in order to fix the slitter knife. In addition, the manufacturing cost is high.

As a slitter device for improving such a problem, there is, for example, the following device. That is, the slitter device does not dispose a spacer between two adjacent slitter knives, but pressurizes the hydraulic pressure of the hydraulic chamber provided inside the slitter knife to expand and displace the sleeve toward the inner circumference or the outer circumference. The plurality of slitter knives are fixed at appropriate intervals.

For example, a shrink sleeve is provided between the slitter knife 3 and the shaft 1, and a groove or a recess is formed in a ring shape on the outer circumference of the shrink sleeve, and the groove or the recess and the inner peripheral surface of the slitter knife 3 are formed. By adjusting the pressure of the hydraulic chamber formed by and, the shrink sleeve is reduced in diameter so that the slitter knife 3 is fixed at an arbitrary position on the shaft 1.

Further, in the slitter device described in Japanese Utility Model Publication No. 60-35543, Japanese Utility Model Publication No. 49-104785, etc., the shaft and slitter are operated by pressurizing the hydraulic pressure of the hydraulic chamber provided inside the slitter knife. A sleeve fitted between the knives is expanded and displaced toward the outer peripheral side to fix a plurality of slitter knives at appropriate intervals.

[Problems to be solved by the device] However, in the above-mentioned first slitter device, the shaft is connected only by the inner peripheral surface of the contraction sleeve due to the increase in the pressure of the hydraulic chamber over the entire circumference, so that the pressurization is increased. At times, the phenomenon of compression or flow of liquid in the hydraulic chamber is likely to occur, and the rigidity of the connecting portion is small. Therefore, 5 / on the slitter knife 3 during rotation.
Side runout of 100 or more may occur. Moreover, since a ring-shaped groove is formed over the entire circumference of the shrink sleeve, when using a shaft with a key, the inner peripheral surface of the shrink sleeve bites into the corner of the key groove, There is a risk that the surrounding surface will be scratched or damaged and hydraulic fluid will leak.

Further, the slitter device described in Japanese Utility Model Publication No. 60-35543 also has a small rigidity of the connecting portion via the sleeve because the hydraulic chamber is formed over the entire circumference of each slitter knife. , There is a risk of side runout of the slitter knife during rotation.

Further, in the case of this slitter device, as in the slitter device described in Japanese Utility Model Application Laid-Open No. 49-104785, a structure is used in which a plurality of slitter knives are simultaneously pressed and fixed by one sleeve or the like. There is the disadvantage that a high hydraulic pressure has to be applied to the chamber. Moreover, if there is variation in the clearance between the outer circumference of the sleeve and the shaft with respect to the inner peripheral surface of each slitter knife, in order to fix a plurality of slitter knives, the maximum clearance must be filled to fix the slitter knife. It is necessary to apply a high liquid pressure, and the pressurizing device becomes large in size, and the cost increases. Because it is necessary to suppress it.

The present invention has been made in view of the above-mentioned circumstances, and can be easily attached to and detached from the shaft, the attachment position to the shaft can be arbitrarily set, and the cutter body can be firmly attached to the shaft. An object of the present invention is to provide a rotary machining tool that can be connected without causing side runout.

"Means for Solving Problems" The present invention relates to an annular rotary working tool such as a slitter knife or a side trimmer cutter in which a plurality of annular cutter bodies are fitted to a shaft and used. A ring-shaped shrink sleeve having a shaft fitted to the circumferential surface is attached to the inner circumferential surface of the cutter body in a fitted state, and one or a plurality of recesses formed on the outer circumferential surface of the shrink sleeve and the cutter body. The inner peripheral surface of the cutter forms one or more hydraulic chambers for each cutter body, and the recesses are provided in regions that do not face each other with respect to the central axis of the inner peripheral surface of the shrinking sleeve, and A communication hole that communicates with the hydraulic chamber is formed in each of the hydraulic chambers, and a piston that adjusts the pressure of the hydraulic oil filled in the hydraulic chamber is provided in the communication hole such that the piston can move forward and backward. The one in which the features.

"Operation" When the pressure of the hydraulic oil in each hydraulic chamber is increased, the inner peripheral surface of the shrink sleeve corresponding to the recess is displaced inward in the radial direction,
The shaft is pressed against the inner peripheral surface of the region facing the hydraulic chamber with respect to the central axis. Since there is no recessed portion, that is, the hydraulic chamber, on the outer peripheral surface of the region of the contracting sleeve that faces the hydraulic chamber, compression or flow of hydraulic pressure does not occur, so the rigidity is high and the shaft is in this inner peripheral region. It will be pressed and firmly connected. Moreover, the pressure in each hydraulic chamber is
Since the pistons can be set according to the clearance between each cutter body and the shaft, the cutter bodies can be firmly fixed with a relatively small pressure.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the construction of a slitter knife 5 according to an embodiment of the present invention. In this figure, 10 is an annular base
A cutter body is composed of 10a and a cutting edge portion 10b extending from the base portion 10a in the outer peripheral direction. The cutter body 10 is integrally formed of alloy tool steel, powder high-speed steel, or cemented carbide. Further, 12 is a shrink sleeve composed of a cylindrical portion 12a and a flange portion 12b, and the shrink sleeve 12 is fitted in a recess 10c formed in the inner peripheral surface of the cutter body 10 and has a plurality of bolts 13, 13 It is fixed by ... The inner diameter of the shrink 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 shrink sleeve 12, as shown in FIGS. 2 (a) and 2 (b), recesses 12c are formed at positions deviated in the circumferential direction, and the recess 12c is formed with respect to the central axis of the shrink sleeve. Thus, no concave portion is formed in the area facing each other. A hydraulic chamber 14 is formed between the recess 12c and the inner peripheral surface of the base 10a of the cutter body 10. The number of hydraulic chambers 14 need not be limited to one or two, and may be three or more.
When there are a plurality of hydraulic chambers 14, even if the pressure in one of the hydraulic chambers 14 drops due to a malfunction of a piston or the like described later,
If the pressure of any one of the hydraulic chambers 14 is maintained, there is an advantage that the connection state with the shaft 1 can be maintained.

On the other hand, the base portion 10a of the cutter body 10 is formed with a communication hole 16 which opens to the outer peripheral surface and extends to the hydraulic chamber 14, and a female screw 16a is formed in the vicinity of the opening of the communication hole 16. A piston 18 is slidably inserted into the communication hole 16, and an adjusting screw 20 screwed into the female screw 16a is screwed into the communicating hole 16. The hydraulic oil is filled in the hydraulic chamber 14, and the pressure of the hydraulic oil in the hydraulic chamber 14 is increased by screwing the adjusting screw 20 into the hydraulic chamber 14, while the pressure is lowered by loosening the adjusting screw 20. can do. Thus, the hydraulic chamber
The contraction amount of the contraction sleeve 12 can be adjusted by adjusting the pressure of the hydraulic oil inside 14. Also,
O-rings 21 and 22 for preventing liquid leakage are provided between the cutter body 10 and the contracting sleeve 12, and a concave portion 18a is formed at the end of the piston 18 to prevent liquid leakage. The O-ring 23 is fitted into the hydraulic chamber 14 so that the hydraulic chamber 14 is kept sealed and the internal pressure of the hydraulic chamber 14 is maintained for a long time.

Here, the communication hole 16 is the size of the cutter body 10 and the hydraulic chamber.
The adjusting screw 20 and the piston are provided at one place or a plurality of places according to the number of 14 and the contraction amount of the contracting sleeve 12.
18 is provided in each communication hole 16.

When the slitter knife 5 configured as described above is attached to the shaft 1 of the slitter device, first, the adjusting screw 20
To lower the pressure of the hydraulic oil in the hydraulic chamber 14 sufficiently.
In this state, as shown in FIG. 3, the slitter knife 5 is set at a desired position on the shaft 1, and this time the adjusting screw 20
Is screwed in to increase the pressure of the hydraulic oil in the hydraulic chamber 14. Then, as the pressure of the hydraulic oil in each hydraulic chamber 14 increases, the inner peripheral surface of the shrinking sleeve 12 corresponding to the recess 12c is displaced radially inward and comes into pressure contact with the outer peripheral surface of the shaft 1. The shaft 1 is pressed and fixed to the inner peripheral surface of the shrink sleeve 12 on the opposite side of the recess 12c. Thus adjusting screw
The slitter knife 5 can be attached to an arbitrary position on the shaft 1 only by loosening or screwing 20.

Next, another embodiment of the present invention will be described with reference to FIGS.

4 and 5 show a case in which the base portion 10a of the cutter body 10 and the cutting edge portion 10b are configured separately. Further, in the embodiment shown in FIG. 4, the cutting edge portion 10b is attached to the base portion 10a by the bolt 25. Further, in the embodiment shown in FIG. 5, the cutting edge portion 10b is clamped by the base portion 10a and the flange portion 12b of the shrink sleeve 12, and is tightened by the bolt 26. This bolt 26 is the first
It also has the function of the bolt 13 shown in the figure. According to these embodiments, when the cutting edge portion 10b is worn and needs to be replaced, only the cutting edge portion 10b can be replaced with a new one.

Further, FIG. 6 shows a case where the cutter body 10 and the contraction sleeve 12 are fixed by welding, and in the figure, 30 is a welded portion. Further, FIG. 7 shows a case where the cutter body 10 and the shrink sleeve 12 are fixed by shrinkage fitting, and in the figure, 31 indicates a shrinkage fitting portion.

[Advantages of the Invention] As described above, according to the present invention, the annular shrink sleeves to which the shafts are fitted are attached to the inner peripheral surface of the cutter body while being fitted therein. One or more hydraulic chambers are formed for each cutter body by the one or more recesses formed on the outer peripheral surface of the contraction sleeve and the inner peripheral surface of the cutter body, and the recesses are formed on the inner peripheral surface of the contraction sleeve. Are provided in regions that do not face each other with respect to the center axis of the hydraulic cylinder, and the cutter body is formed with a communication hole that communicates with the hydraulic chamber, and the communication hole has a pressure of the hydraulic oil filled in the hydraulic chamber. Since the piston that adjusts is installed so that it can move back and forth, the rotary machining tool can be easily attached to any position on the shaft simply by adjusting the pressure of the fluid 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 in and out the spacer ring and shortens the setting work.

It is possible to easily adjust the clearance between the rotary working tools (slitting knives) when the thickness of the sheet material to be cut is changed.

Since the spacer ring is not required, the manufacturing cost and maintenance cost of the spacer ring, which have been conventionally required, are unnecessary, and the cost associated with the use of the rotary machining tool is significantly reduced.

The clearance between the rotary machining tool and the shaft to which this tool is attached is from 0.005 to 0.015 mm to 0.015 to 0.0
It can be 3 mm, and as a result, even unskilled people can perform the tool replacement work, and further, the replacement work using the automatic attachment / detachment device can be performed, and the replacement work time can be shortened.

When the pressure of the hydraulic oil in the hydraulic chamber is increased, the inner peripheral surface of the shrink sleeve corresponding to the recess is displaced radially inward and presses the shaft against the inner surface of the shrink sleeve on the opposite side of the recess. The region without the recess facing the region having the recess has a high rigidity because there is no hydraulic chamber, and the shaft of the contraction sleeve having a high rigidity supports the shaft. For this reason, the contraction sleeve and the shaft can be firmly connected to each other, and thereby side runout of the cutter body during rotation can be prevented.

Furthermore, for example, when there is a key groove on the outer peripheral surface of the shaft, the contracting sleeve can be installed so that the concave portion of the contracting sleeve does not overlap with the key groove. Can be prevented from scratching or damaging the inner peripheral surface.

Also, since the shrink sleeve, the hydraulic chamber, the piston, etc. are provided for each cutter body, even if there is variation in the clearance between each cutter body and the shaft, it can be individually adjusted by the piston according to each clearance. Since various hydraulic pressures can be set, each cutter body can be fixed with a relatively small pressure.

[Brief description of drawings]

FIG. 1 is a sectional view showing the construction of an embodiment of the present invention, and FIG.
FIGS. 3A and 3B are sectional views for explaining the position of the hydraulic chamber 14 in the same embodiment, and FIG. 3 is a partial sectional view showing the structure when the slitter knife 5 according to the embodiment is attached to the shaft 1. FIGS. 4 to 7 are sectional views showing the structure of another embodiment of the present invention, FIGS. 8A and 8B are front and side sectional views showing the structure of a conventional slitter knife, 9th
The drawing is a partial cross-sectional view showing the structure when a conventional slitter knife is attached to a shaft. 5 …… Slitting knife, 10 …… Cutter body, 10a …… Base, 10b …… Blade edge, 12 …… Shrinking sleeve, 14 …… Hydraulic chamber, 16 …… Communication hole, 18 …… Piston, 20 …… Adjustment Screw.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Toyoda 1528 Nakanishi, Yokoi, Kobe, Anha-gun, Gifu Prefecture, Gifu Works, Mitsubishi Metals Co., Ltd. (56) Reference JP-A-50-53970 (JP, A) ) Actual development Sho 49-104785 (JP, U) Special public official Sho 57-49024 (JP, B2) Actual public Sho 60-35543 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. An annular rotary machining tool, such as a slitter knife or a side trimmer cutter, in which a plurality of annular cutter bodies are fitted to a shaft to be used, and the shaft is fitted to the inner peripheral surface thereof. Annular shrink sleeves are fitted in the inner peripheral surface of the cutter body, respectively, and are formed by one or more recesses formed on the outer peripheral surface of the shrink sleeve and the inner peripheral surface of the cutter body. One or a plurality of hydraulic chambers are formed for each cutter body, and the recesses are provided in regions that do not face each other with respect to the center axis of the annular contraction sleeve. Communication holes that communicate with each other are formed, and a piston that adjusts the pressure of the hydraulic oil filled in the hydraulic chamber is provided in the communication hole so that the piston can move forward and backward. A rotary processing tool that does.