JP2520761Y2 - Slitter device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] In the present invention, one of the upper blade and the lower blade is a thin plate-shaped round blade, and the thin plate-shaped round blade is the other circular ring. The present invention relates to a slitter device that continuously cuts a belt-like material such as a film or a metal foil into a predetermined width dimension while being pressed against the blade, and more particularly to a slitter device that greatly improves the life of a thin plate-shaped round blade.

[Conventional technology]

In a conventional slitter device of this type, as shown in FIG. 5, a thin plate-shaped upper blade 1 and an annular lower blade 3 held by an upper blade holder 2 have an upper blade shaft 4 and a lower blade shaft 5 at regular intervals. It is located in. The upper blade shaft 4 and the lower blade shaft 5 are installed in parallel to the slitter device main body, and the blade edge of the upper blade 1 is pressed against the blade edge side surface of the lower blade 3. A sheet-shaped object to be cut such as a film or a metal foil is cut while traveling between the upper blade 1 and the lower blade 3. Reference numeral 6 is a disc spring. This thin plate-shaped upper blade 1 uses a round blade 11 that has been previously processed into a dish shape as shown in FIG. 6, and a flat disk-shaped round blade 11 as shown in FIG. It can be divided into two types, one for forcibly deforming and holding it by using the coil spring 7 and the like when it is assembled into the two.

Further, regarding a slitter for cutting a magnetic tape, particularly one disclosed in JP-A-60-201895 is known as a prior art of a slitter for cutting a magnetic tape in which at least one of the upper and lower blades has a long life. ing.

[Problems to be solved by the device]

In the conventional slitter device including an annular round blade and a thin plate-shaped round blade, alloy tool steel (SKD material) or high speed tool steel (SKH material) is generally used for the upper blade 1 and the lower blade 3. There is. And the heat treatment of the condition suitable for the cut object is given,
It was considered to be a blade in consideration of wear resistance. However, it is unavoidable that the cutting edge is worn due to the pressure contact between the upper blade and the lower blade during cutting and the contact with the object to be cut. Therefore, when a certain length is cut, the amount of wear of the cutting edge increases, and harmful defects such as burrs, high edges, and cracks occur at the cut edge of the cutting object, reducing the product value of the cutting object. It is necessary to sharply correct the cutting edge by regrinding before the wear of the blade becomes constant.

This corrective grinding operation requires considerable time and labor. In particular, due to the special shape of the cutting edge, each blade must be ground individually, and the operations such as removal from the vertical shaft and upper blade holder, and reassembly after grinding have become complicated.

Further, the slitter for cutting the magnetic tape disclosed in JP-A-60-201895 comprises a back ring and a cutting edge ring, and the back ring and the cutting edge ring are integrated by sintering under ultrahigh pressure and high temperature. In addition, the cutting edge ring is a slitter made of a polycrystalline sintered body containing cubic boron nitride and / or diamond as a main component, and the back ring is a slitter made of cemented carbide. Since a polycrystalline sintered body containing as a main component is a material that has extremely high hardness and is fragile, it cannot withstand use as a slitter by itself, so a cemented carbide as a buckling is required. In terms of materials and manufacturing man-hours, it becomes a very expensive slitter. In addition, the cutting edge ring part made of polycrystalline sintered body It is also made to the general 0.5~0.7mm.

The present invention has been made in view of the above circumstances, and in the same manner as in the prior art, in a slitter device that uses alloy tool steel (SKD material) or high speed tool steel (SKH material) for both upper and lower round blades, It is an object of the present invention to provide a slitter device that improves wear resistance and greatly reduces the number of times of blade repair and grinding.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention has an annular round blade,
A plurality of thin plate-shaped round blades that are relatively elastically deformed are fitted to the lower shaft and the upper shaft, respectively, and the thin plate-shaped round blade is pressed against the annular round blade to form a sheet-shaped object. In the slitting device for slitting, of the annular round blade and the thin plate-shaped round blade, only the thin plate-shaped round blade is provided with a TiN layer with a thickness of 1 to 5 μm by vapor deposition.

[Action]

In the present invention, the TiN layer is applied only to the thin plate-shaped upper blade that is relatively elastically deformed by vapor deposition, so that the surface hardness of the upper blade is increased and the wear resistance of the upper blade is improved. When the upper blade is pressed against the blade, the upper blade is slightly elastically deformed, so that excessive wear does not occur. Also, since the surfaces of the contact parts of the upper and lower round blades are not the same kind of metal, it becomes difficult for them to adhere to each other, and the adhesion wear decreases, so the wear amount of the lower blade without TiN layer also decreases, and the upper blade, Both lower blades have improved durability.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a partial view showing the relationship between the thin plate-shaped upper blade 1 and the annular lower blade 3, in which the upper blade 1 and the lower blade 3 are SK.
Made of H material, SKD material, SUJ material, or other special steel suitable for cutting tools, heat-treated according to the type of steel used and the cutting conditions of the work, etc., and the final cutting tool shape is obtained by grinding. It is finished. Then, on the surface of the upper blade 1, a TiN film having a thickness of 1 to 5 μm is formed by vapor deposition such as PVD (physical vapor deposition).
A (titanium nitride) layer 1a is applied. FIG. 2 is a diagram showing a state after the upper blade 1 is repaired and ground because the blade edge of the upper blade 1 is worn due to long-term use. The upper blade 1 is ground by grinding the outer peripheral surface 1d of the upper blade 1. The blade edge is re-formed by removing it, and the TiN layer 1a on the side surface in contact with the lower blade 3 remains, so that the abrasion resistance of the re-ground upper blade 1 is extremely small.

Next, experimental results showing that the abrasion resistance of the upper and lower blades is improved by the slitter device of the present invention will be described.

First, the outer diameter of the thin plate-shaped upper blade used in the experiment was 98 mm, the plate thickness was 0.5 mm, the material was SKH2, and the annular lower blade facing it was 80 mm in outer diameter, and the material was SKD11. Also,
The line speed was set to 40 M / min based on the lower blade, and the rotation speed of the upper blade was set to a value that increased 10% with respect to this line speed.

In this experiment, cutting was not performed, but the amount of wear generated by the pressure running of the upper blade and the lower blade was measured. The results are shown in FIGS. 3 and 4. Here, the result when a new blade is used is represented by a solid line, and the result when a refurbished blade that has undergone repair grinding once is used is represented by a broken line. FIG. 3 shows the relationship between the traveling distance and the wear amount of the upper blade.
The figure shows the relationship between the distance traveled and the amount of wear of the lower blade. The amount of wear is represented by a comparative value.

From FIGS. 3 and 4, for example, when viewed at a position of a traveling distance of 60 km, the upper blade of this embodiment has a wear amount of about 10% of the conventional blade not having the TiN layer, and the lower blade corresponding thereto. It can be seen that even the conventional wear amount is about 70% of the conventional wear amount.

[Effect of device]

As described in detail above, according to the present invention, by applying a TiN layer to only a thin plate-shaped round blade that is relatively elastically deformed by vapor deposition, the wear resistance of the upper and lower blades can be improved and it can be extended for a long time. Cutting performance is maintained and burr at the cut end of the cut object.
Before the occurrence of harmful defects such as high edges and cracks,
A cutting length several times as long as that of the conventional device can be secured, and the number of times of cutting and repairing a blade can be significantly reduced, so that productivity can be improved and its effect is great.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention and is a partial sectional view showing the relationship between the upper blade and the lower blade. FIG. 2 is a partial cross-sectional view showing a state in which the upper blade is repaired and ground. 3 and 4 are diagrams showing the results of the experiment. FIG. 5 is a schematic configuration diagram of the slitter device, and FIGS. 6 and 7 are sectional views showing the shape of a thin plate-shaped round blade. 1 ... Upper blade, 1a ... TiN layer 2 ... Upper blade holder, 3 ... Lower blade 4 ... Upper blade axis, 5 ... Lower blade axis 6 ... Disc spring, 7 ... Coil spring 11 ... Round blade

Claims (1)

(57) [Scope of utility model registration request] 1. A plurality of annular round blades and a plurality of thin plate-shaped round blades that are relatively elastically deformable are fitted to the lower shaft and the upper shaft, respectively.
In the slitter device that presses the thin plate-shaped round blade onto the annular round blade and slits the sheet-shaped object, only the thin plate-shaped round blade among the annular round blade and the thin plate-shaped round blade A slitter device characterized in that a TiN layer having a thickness of 1 to 5 μm is applied by vapor deposition.