JPS60114413A - Device for fixing rotary cutter of slitter - Google Patents

Abstract

PURPOSE:To enable a rotary cutter to be fixed at any desired position in the captioned slitter for cutting through to divide metal belt, by providing a cutter fixing device in which a rotary cutter is mounted on the outer face of an outer taper sleeve and an oil film is hydraulically formed on the surface and back face of an inner taper sleeve adapted to be pressed into or drawn out. CONSTITUTION:High-pressure oil is fed from the end (a) of the blade axis such that the inner and outer faces of an inner taper sleeve 14 is swelled by the high pressure oil and an oil film is formed thereon. The inner taper sleeve is pressed into by means of an outer nut 15 to increase its outer diameter. In case of decreasing the diameter, the inner taper sleeve is drawn out with an inner nut 16. This constitution allows a rotary cutter to be fixed at any desired position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for dividing and cutting a metal strip, and more particularly to an apparatus capable of changing the setting of a rotary blade to an arbitrary position with respect to a blade axis.

[Background of the invention]

The structure of a general rotary blade for a slitter is shown in Figure 1. In the figure, the lower rotary blade 5 has a spacer 9.9'.

(1) The reference side blade is fixed in the axial direction with nut 8 through 9" and 91. Here, the gap S between the upper and lower blades is:
Adjustment is made by moving the upper rotary blade 4 side in the axial direction, in this case spacers 6.6', 6''.

Adjust by increasing or decreasing the 6" gap A7, 7' t 7', 7-. This adjustment work is necessary when there are many blades or when the gap between the upper and lower blades is small with a small diameter rotary blade. Moreover, it requires several shim adjustments, and furthermore, it requires a great deal of time and skill to obtain the optimum gap, such as adjusting the tightening of the nut 8.

[Purpose of the invention]

An object of the present invention is to provide a slitter that can fix a rotary blade in any position by increasing the shaft diameter of the blade by combining hydraulic pressure and a tapered sleeve.

[Summary of the invention]

The present invention applies high pressure oil to the inner sleeve of the combined inner and outer tapered sleeves, forms an oil film to facilitate axial movement, and increases (2) or decreases the outer diameter of the outer sleeve by moving the inner tapered sleeve in and out. let The rotary blade is fixed to the blade shaft by tight fitting with the rotary blade due to the increased diameter of the blade shaft.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG.

Both ends of the knife shaft 10 are supported by bearings 11, 11'. An inner tapered sleeve 14 and an outer tapered sleeve 13 are assembled into the body of the cutter shaft 10, and the outer diameter rotary blade 12 of the outer tapered sleeve 13 is inserted. The inner tapered sleeve 14 has oil grooves on its inner and outer surfaces so that high-pressure oil applied from the blade shaft end a can pass therethrough.

When increasing the shaft diameter, high pressure oil is sent from the blade shaft end a to expand the inner and outer surfaces of the inner tapered sleeve 14 to form an oil film, and then the inner tapered sleeve 14 is pushed in using the outer nut 15. , the outer diameter can be increased. Conversely, in order to reduce the diameter, the inner taper sleeve can be pulled out using the inner nut 16.

Note that a spigot d is provided to prevent the outer tapered sleeve (3) from moving in the axial direction during these operations.

By increasing the diameter of the outer tapered sleeve, the rotary blade 12 can be fixed in any desired position. Note that there is no need to apply high-pressure oil except when increasing or decreasing the diameter, and when the hydraulic pressure is removed after increasing the diameter, the tight fitting force between the inner and outer tapered sleeves 13 and 14 and the rotary blade 12 will prevent the position from slipping. There is no such thing.

According to this embodiment, the diameter can be increased or decreased by simple operations such as applying high-pressure oil and rotating the inner and outer nuts to move the inner tapered sleeve, and the fixation and release of the single-turn blade can be easily performed. . In addition, the structure itself is simple, making it possible to reduce equipment costs and maintenance costs. Furthermore, even if the inner taper sleeve is pushed in when the outer diameter increases, the outer taper sleeve will not shift in the axial direction due to the spigot d in Figure 2, and the gap between the upper and lower cutters can be set with high precision.

In addition, in the figure, 1 is the upper blade axis, 2 is the lower blade axis, 3, 3' (4) is a bearing, and 4 is an upper rotary blade.

〔Effect of the invention〕

According to the present invention, the diameter of the shaft can be increased or decreased, and the rotary blade can be fixed or released easily.

In addition, the diameter accuracy when increasing can be uniformly increased in the axial direction, and there is no tilting of the blade when fixing the rotary blade, allowing highly accurate positioning.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional blade shaft, and FIG. 2 is a sectional view of a blade shaft according to the present invention. DESCRIPTION OF SYMBOLS 10...Cutter shaft, 12...Cutter, 13...Outer taper sleeve, 14...Inner taper sleeve. Agent Patent attorney Akio Takahashi (5) Figure 1 (b)

Claims (1)

[Claims] In a slitter consisting of a pair of upper and lower blade shafts each having 10 rotating blades. The rotary blade is provided on the outer surface of a pair of inner and outer tapered sleeves that are joined together on the tapered surface, and the cutter shaft is fitted on the inner surface of the inner tapered sleeve so that the inner tapered sleeve can be pushed and pulled. A rotary blade fixing device for a slitter, characterized in that an oil film can be formed on the front and back surfaces of the slitter using hydraulic pressure.