JPS6144523A - billet cutting equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to steel slabs such as slabs (hereinafter simply referred to as slabs).
This relates to a cutting device ζ.

(Conventional technology and its problems) In general, hot slab shearing machines are
．． The shearing section structure shown in Figure 3f is adopted.

That is, as shown in Figure 3, it is a composite blade in which a cutter 1 is fixed to a holder 3 with a bolt 4. In this structure, the horizontal force (PK) during shearing + the deflection of the knife 1 occurs, the gap with the holder 3 is enlarged, the clearance becomes large, and a good sheared surface shape cannot be obtained.

On the other hand, the clearance is adjusted using the shim 2 between the cutter 1 and the holder 3 shown in FIG. 3, and the upper blade slider 41 shown in FIG.
Since the lower blade 1-2, which has been adjusted once, is installed on the lower blade slider 5 and the clearance between 1-1 and 1-2 is set to the set value, it is necessary to change the blade or remove the blade when adjustment is possible. Since the adjustment time is limited and the adjustment time is long, the frequency of adjustment is limited, making it difficult to finely adjust the clearance, and it is difficult to maintain a good sheared surface shape over a long period of time. In FIG. 4, 8 is a hot slab.

(Means 9 for solving the problem) The present invention provides a blade shape necessary for a shearing device having an integral structure with increased rigidity.
Preferably, the blade is constructed so that the inside of the blade can be cooled (thus, a good shearing surface shape is obtained, and at the same time, the deflection of the blade is reduced and the life of the blade is extended).

In order to achieve the above object, the present invention is configured as follows. That is, a steel billet hot shearing device 1 for cutting steel billets is characterized in that the cutter and the cutter holder are integrally constructed, and a clearance adjustment device is provided on the slider of either the upper or lower knife. It is a device.

Since the present invention is constructed as described above, when an object to be sheared is sheared, vertical force Pv and horizontal force PH act on it, as shown in FIGS. 1 and 3. PH works to spread the knife apart. On the other hand, the rigidity force of the cutter is quadratic in the cross section. b = Height of cutter 1 hl: Thickness of cutter 1 h2: Thickness of holder, thickness of the two-piece force h3) h2) When h, +1. = h2+ b□
However, if the same horizontal force I'H occurs, the second moment of the integral force 6 shown in Figure 1 (Table 11) is 1 inch thicker, so the deflection of the blade is small, and the clearance between the upper and lower blades is becomes stable.

Table 1 (Example〕 A device according to an embodiment of the present invention will be described below with reference to FIG.

As shown in FIG. 2, an upper blade slider 41, an upper blade 6A, and a clearance adjustment device 7 are attached.

A lower blade slider 51 and a lower blade 6B are attached.

These upper blade 6A and lower blade 6B are formed by integrating a blade and a blade holder (FIG. 1).

Further, the clearance between the upper blade 6A and the lower blade 6B is adjusted by moving the clearance adjustment device 7 provided on the upper blade slider 4 in FIG. 2 from side to side. This glue 1 No balance adjustment device 7
It is sufficient that either one of the upper blade and the lower blade is provided. When the hot slab reaches the area between the upper blade 6A and the lower blade 6B, the upper blade or the lower blade moves up or down to cut the slab. Measure the gap between the blades 6B and use it when it is out of a predetermined range, and adjust the clearance or replace the blade when it exceeds the adjustment limit.

In addition, in the present invention, as shown in FIG. 1, a cooling water passage 9 is formed inside the integrally constructed blade 6, and water cooling can be performed by passing cooling water through this, thereby extending the life of the blade. It is preferable to plan for extension.

(Effects of the Invention) In the present invention, the cutter and the holder are integrated, and the clearance between the upper and lower blades is adjusted appropriately using the rearrangement adjustment device 1, so that a good slab sheared surface shape can always be obtained and the finished product In addition to reducing the occurrence of harmful defects, the rolling yield is improved by reducing the number of recuts, and furthermore, when cooling the inside of the cutter, the stress caused by heat is reduced.1.
It has great effects in this field, such as reducing the occurrence of cracks in cutlery and making it possible to extend the life of cutlery.

[Brief explanation of the drawing]

Figure M1 is a sectional view of the main part showing an embodiment of the present invention, Figure 2 is a sectional view of the main part explaining the installation situation of the upper and lower blades of the embodiment of the invention, and Figure 3 is a sectional view of the main part of the conventional example. A cross-sectional view showing the relationship between the blade and the holder, and FIG. 4 is a side cross-sectional view showing the entire conventional shearing machine. 4... Upper blade slider, 5... Lower blade slider, 6
A...Upper blade, 6B...Lower blade, 7...Clearance adjustment device, 9...Cooling water passage.

Claims (2)

[Claims] (1) A hot shearing device for steel billets, characterized in that the cutter and the cutter holder are integrally constructed, and a slider of either the upper blade or the lower blade is provided with a clearance adjustment device. . (2) The steel billet cutting device according to claim 1, wherein at least the upper blade has an internal cooling structure.