JPS6035543Y2 - Cutting shaft of slitting device - Google Patents

Description

[Detailed description of the invention] This invention relates to a cutter shaft used in a slitting device that cuts a steel plate into a predetermined number of strips, and in particular a cutter shaft that uses hydraulic pressure to fix a disc-type cutter. This is related to the improvement of

In a slitting device, cutter shafts each having a disc-type cutter are disposed above and below, and the material passing between them is sheared to slit the material into a predetermined number of threads.The material to be cut is a thin steel plate, for example. 0.3
In the case of rIrlrL to around 1.07rIIn, it is necessary to keep the tolerance of the clearance value and wrap value given to the upper and lower two cutters substantially within the range of 17100 mm.

For this purpose, as shown in FIG. 1, a sleeve 2 is fitted around the outer periphery of the arm μ1, an annular pressure receiving chamber 3 is formed between the fitting surface of the sleeve 2 and the arm μ1, and the sleeve 2 is fixed on the sleeve 2. A cutter shaft has been proposed in which the cutter 4 is fixed by expanding the outer diameter of the sleeve 2 with the pressure of liquid supplied from a passage 5 provided in the arc 1 to the pressure receiving chamber 3.

The pressure receiving chamber 3 in the above-mentioned conventional cutter shaft is formed continuously over the entire length in the axial direction, leaving a fitting portion 6 for the sleeve 2 and the arm μ1 at both ends, and the cutter 4 is fixed by hydraulic pressure acting over the entire length of the pressure receiving chamber 3. It is supposed to be done.

However, the width of the material to be cut is, for example, within the range of 600 to 160 mm, and is not constant. Therefore, even when slitting a narrow material, hydraulic pressure must be applied to the entire length of the pressure receiving chamber 3, and the fitting portion This occurs only at both ends, resulting in insufficient gripping force and slipping at the fitting portion between the sleeve and the arm.

Therefore, in the conventional cutter shaft, in order to prevent the cutter from slipping, it is necessary to increase the surface pressure of the fitting portions 6 at both ends of the sleeve against Aμ, which increases the stress on the sleeve and reduces the fatigue strength of Aμ. Moreover, since it is necessary to lengthen the fitting part 6, there are disadvantages such as making it difficult to apply it to the current cutter shaft without modification.

This idea was proposed in order to solve the above-mentioned problems.The pressure receiving chamber formed between the arm and the sleeve is divided for each cutter, and hydraulic pressure is applied to each pressure receiving chamber. It is an object of the present invention to provide a cutter shaft which increases the contact area of the sleeve with the arm and greatly improves the gripping force of the cutter.

An embodiment of this invention will be described below based on FIGS. 2 and 3.

A cutter shaft 11 according to this invention has an annular pressure receiving chamber 1 formed between an arm μ 12 and a sleeve 13 fitted therein.
4 is divided into a plurality of pieces corresponding to the number of cutters 15 attached to the outer periphery of the sleeve 13, and the arm μ12 is provided with a hydraulic pressure supply passage 16 communicating with each pressure receiving chamber 14, which is opened at one end of the arm μ12. , and each of these openings is provided with a valve mechanism 17 capable of supplying liquid thereto and keeping it sealed.

Each of the valve mechanisms 17 is connected to the opening of the hydraulic pressure supply passage 16 via a pipe provided with a rotatable joint to supply and discharge hydraulic pressure from a hydraulic pressure supply source to the respective pressure receiving chambers 14.

The cutter shaft of this invention has the above-mentioned configuration,
When arranged vertically and used as a slitting device, hydraulic pressure is supplied and sealed in the pressure receiving chamber 14 of the cutter 15 portion located within the width of the material to be cut via the valve mechanism 17, and the diameter of the sleeve 13 is adjusted to the diameter of each cutter. Inflate each part of the sleeve 13
A cutter 15 is fixed on top to perform cutting work.

In this way, the cutter shaft 11 of the present invention has a pressure receiving chamber 14 of the cutter 15 located within the width of the material to be cut.
This is to fix the cutter 15 by supplying hydraulic pressure only to the cutter 15. If the width of the material to be cut is narrow, hydraulic pressure will not be supplied to the pressure receiving chambers near both ends, and the fitting will not occur at this point. The grasping power of the parts does not decrease.

Further, in the pressure receiving chamber 14 supplied with the hydraulic pressure, the diameter of the sleeve 13 expands as shown by the dashed line in FIG. 3, and the cutter 15 is fixed to the sleeve 13.

In this case, the sleeve 13 facing the pressure receiving chamber 14 is
The portion extending from the end of the grip to the fitting portion becomes a gripping force decreasing portion A that slopes from the expansion deformation portion to the fitting portion as shown by the dashed line in Fig. 3, but slipping due to a decrease in gripping force will not occur. do not have.

As described above, according to this invention, the pressure receiving chamber formed between the arm and the sleeve is divided into a plurality of parts corresponding to the number of cutters, and hydraulic pressure can be separately supplied and sealed in each pressure receiving chamber. As a result, it is possible to form a contact area between the sleeve and the shaft at both ends of the sleeve and between each pressure receiving chamber, and since the contact area is significantly increased compared to the conventional case, the gripping force between the arm and the sleeve is reduced. Moreover, the cutter and the sleeve are completely fixed, and there is no slippage of the cutter at all, making it possible to downsize the cutter shaft.

In addition, since the pressure receiving chamber is divided into parts for each cutter,
Since hydraulic pressure can be supplied to the pressure receiving chamber according to the width of the material to be cut, the stress on the sleeve during slitting can be alleviated, and the thickness of the sleeve can be made thinner to increase the amount of diameter expansion and strengthen the cutter fixing force. can do.

[Brief explanation of drawings]

Figure 1 is a partially cutaway front view showing a conventional cutter shaft.
FIG. 2 is a partially cutaway front view of the cutter shaft according to this invention, and FIG. 3 is an enlarged sectional view of the main part of the same. 11 is a cutter shaft, 12 is a μ, 13 is a sleeve, 14 is a pressure receiving chamber, 15 is a cutter, 16 is a hydraulic pressure supply passage,
17 is a valve mechanism.

Claims (1)

[Scope of utility model registration request] An annular pressure-receiving chamber is formed between the arc and the sleeve fitted onto it, and the sleeve is expanded by supplying hydraulic pressure into the pressure-receiving chamber, thereby fixing the sleeve and the cutter fitted onto it. In the cutter shaft, the pressure receiving chamber formed between the arm μ and the sleeve is divided into a plurality of parts corresponding to the number of cutters, and a hydraulic pressure supply passage communicating with each pressure receiving chamber is connected to the arm μ end. 1. A cutter shaft for a slitting device, characterized in that the cutter shaft is opened at a portion of the hydraulic pressure supply passage, and a valve mechanism is provided at each opening of the hydraulic pressure supply passage and capable of supplying liquid to the opening and sealingly holding the same.