JPS60213408A - Cutting device - Google Patents

Abstract

PURPOSE:To prevent that a defectively shaped part, such as burr or scab, is made on a section of the material, by forming the edge of the section of a cutting tool to be tapered, and making the material not to move when it is cut. CONSTITUTION:A material 19 to be cut is led between a pair of cutting tools 18, 18 in tapered forms with cutting tool stands 14, 17 separated from each other. Screw shafts 12, 13 are synchronously rotated by a driving gear (not shown in the figure), as the upper cutting tool stand 14 and the lower cutting tool stand 17 are approaching mutually. Then, the upper cutting tool stand 14 and the lower cutting tool stand 17 approach each other, through nuts 15, 16 screwed around thread parts 12a, 12b, 13a, 13b of reverse screws, respectively. As the way of approaching is straight and the material does not move, a defectively shaped part is not made on a section of the cut material.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting device that forms a material into a tapered shape and cuts the material.

Conventionally, gas cutters, saw cutters, shears, etc. have been used to cut rolled billets and the like. However, the gas cutter has the disadvantage that it takes a long time to cut the material, and because of the cutting, the melting of the material called "glue" occurs, which lowers the yield. Saw cutters also have long sawing times, resulting in reduced yields due to the generation of chips. On the other hand, a shearing machine has a short shearing time and does not cause a direct decrease in yield, and although it is advantageous over the former two in these respects, it still has the following significant drawbacks, including the former two. are doing. That is,
The cut surface is perpendicular to the material axis, and there is no fusion burr on the material surface at the cut end.

It is inevitable that defects in shape such as saw burrs or shear burrs will occur. In billet etc.

After cutting, the material is further subjected to processing such as rolling, but the above-mentioned defects not only have a serious adverse effect on these steps, but the defective shape portions are also inconvenient and dangerous in terms of transportation ability. Therefore,
In many cases, a separate device is provided to remove the defective shape portion.

An example of a shearing machine, which is often used for cutting billet materials, will be explained with reference to the drawings. FIGS. 1(a) to (c) and FIGS. 2(a) to (C) are explanatory diagrams of a conventional shearing method and rolling after shearing. In the figure, l indicates the material to be cut, 2 indicates the upper knife, and 3 indicates the lower knife.
Figure (b) shows the state after cutting. FIG. 1(C) shows the shape after shearing. As can be seen, a shear burr 4 is generated at the sheared end of the material 1 to be cut after shearing. FIG. 2(a) shows a state in which the material 5, which is the material to be cut 1, after shearing is rolled by two rolling rolls 6. As can be seen from the figure, the burr 4 collides with the rolling roll 6, causing damage to the rolling roll 6, or causing the burr 4 to fold back.0wIJ
FIG. 2(b) shows a sagging flaw 7 generated on the surface of the material 5 after the burr 4 is folded back and rolled. Since the sagged portion 7 must be discarded as a defective material, it causes a decrease in yield. In addition, since the cut surface is perpendicular to the material axis, it is difficult to get caught in the rolling roll 6, and furthermore, due to uneven rolling deformation, a pipe-shaped defect may occur at the tip of the material 5 after rolling. 8 will be formed. Figure 2 (C,
) shows this situation. This portion 8 also has to be cut away, resulting in a significant decrease in yield.

Furthermore, the shearing machine moves one or both of the upper cutter and the lower cutter in a vertical direction to shear the material.

Regardless of the method used, material movement such as material being lifted up or pushed down is unavoidable. Therefore, measures such as making the lower table movable or attaching a material presser are taken, but there is a risk that the material may be bent or the lifted material may fall, causing damage to both the material and the installation. .

The present invention has been made in order to overcome the above-mentioned drawbacks, and the end of the cut surface is formed into a tapered shape to eliminate material movement during cutting, and to avoid forming defective parts on the material surface. The purpose of the present invention is to provide a cutting device that realizes cutting without causing damage.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

[First Embodiment] FIG. 3 explains the first embodiment of the present invention, in which the cutting device 9 according to the present invention has a screw shaft 12 rotatably supported on upper and lower fixed plates 10 and 11. It is equipped with ゜13.

Threaded portions 12a are formed in the upper and lower parts of each of the screw shafts 12 and 13, spaced apart by a predetermined distance, and having reverse threads.
, 12b and 13a, 13b are formed.

The upper tool rest 1 is attached to the screw portions 12a and 13a located on the upper side.
4 are screwed together via nuts 15, respectively.

In addition, nuts 1 are attached to the lower threaded portions 12b and 13b, respectively.
A lower tool rest 17 is screwed together via 6.

At opposing positions in the center of the upper and lower tool rests 14 and 17, a pair of blades ta each having a tapered shape is provided.
ta is fixed.

The reference numeral 19 indicates a material to be cut, such as a billet.

With the above configuration, when the workpiece 19 is guided between the upper and lower blades 18 and 18 with the upper and lower tool rests 14 and 17 separated and reaches a predetermined position, it is moved by a drive device (not shown). The screw shafts 12.13 are synchronously rotated in a direction in which the upper and lower tool rests 14.17 approach each other.

Then, the threaded portion 12 of the reverse thread is inserted through the nut 15.16.
The upper and lower tool rests 14.17 approach each other via the nuts (15.16) which are screwed together with a, 12b and 13a, 13b, respectively.

This approach occurs linearly with respect to the material to be cut, and the cutting is performed without material movement.

The cut end of the material to be cut 19 is a tapered blade 18.1.
8, the cross section of the cut end also becomes tapered, and there is no burr as in the conventional case, and therefore, there is no occurrence of sludge defects after rolling as in the conventional case.

Therefore, there is no need to discard the sagged portion as a defective portion, which causes a decrease in the yield of the material.

Note that if the upper and lower blades 18.18 are cut so that their blade edges do not come into contact with each other, the blade edges will not be damaged.

Further, when each cutting edge bites into the material to be cut 19, the portion of the material to be cut 19 into which the cutting edge bites is pushed wide left and right, and before the cutting edge approaches the maximum, it is divided into left and right parts.

In the above-mentioned embodiments, the entire device was explained as being fixed, but it can also be used as a so-called running type cutting machine, in which the entire device cuts while moving in synchronization with the movement of the material to be cut. Of course, this is also a good thing.

[Second Embodiment] FIGS. 4 and 5 illustrate a second embodiment of the present invention. In the figures, the reference numeral 20 indicates a fixedly disposed housing. Upper and lower tool rests 21 and 22 are provided so as to be movable up and down.

Each tool post 21, 22 is provided with a pair of tapered blades 23 facing each other.

The lower tool rest 22 is connected to a screw shaft 25 via a thrust bearing 24, as shown in FIGS. 4 and 5.

A threaded portion 25a is formed at the upper end of the threaded shaft 25,
This threaded portion 25a is screwed into a nut 26 fixed to the housing 20 side.

A spline portion 27 is formed at the lower end of the screw shaft 25, and a worm wheel 28 is formed on this spline portion 27.
are fitted.

The worm wheel 28 meshes with a worm gear (not shown).

Although the cross section is not shown in FIGS. 4 and 5, the upper tool rest 21 is connected to the lower end of the screw shaft via a thrust bearing 29, and the upper end of this screw shaft is connected to the housing 20. Like the lower screw shaft 25, the upper end portion is fitted into a worm wheel device 28a, and is rotated via a worm gear (not shown).

The upper and lower screw shafts are rotated by separate drive sources.

Based on the above structure, the workpiece 30 is guided with the pair of upper and lower blades 23 separated vertically, and when it reaches a predetermined position, a drive source (not shown) is activated. When driven, the upper and lower screw shafts 25 are rotated via the upper and lower worm gears, and each screw shaft 25! i: Move in the direction approaching the target.

As a result, the upper and lower blades 23 and 23 approach through the upper and lower blade bases 21 and 22, bite into the material to be cut 30, and cut in the same manner as described above.

As a result, as in the above-mentioned embodiments, no burrs occur, no sagging defects occur even after rolling, and the yield of the material is high.

[Third Embodiment] FIGS. 6 and 7 illustrate a third embodiment of the present invention, and the embodiment shown in FIGS. 4 and 5 is modified on the Kinomio side. , so that the upper and lower tool rests 21 and 22 can be driven synchronously by the same drive source.

That is, a bearing 32 is provided on the side surface of the housing 20, and a rotating shaft 31 for transmitting rotation is provided in the upper and lower parts of the housing 20.
Bevel gears 33 and 34 are provided at the upper and lower ends of the rotating shaft 31 so that the driving force from the same driving source can be transmitted to the upper and lower tool rests 21 and 22 in synchronization.

In this way, even if the upper and lower cutters are driven by the same drive source, in addition to the same effects as in the embodiment described above, one drive source can be omitted, resulting in cost reduction.

[Fourth Embodiment] FIGS. 8 and 9 illustrate a fourth embodiment of the present invention, which is illustrated as a modification of the third embodiment.

That is, the rotation of the rotating shaft 35 connected to one drive source (not shown) is transmitted to the worm gear 36, thereby rotating the worm wheel 28 and simultaneously rotating the lower bevel gears 34 and 33, as described above. Similarly, the rotation axis 3
The mechanisms for rotating the upper and lower tool rests 21 and 22 are the same, but the housing 20 has a narrower width when viewed from the side, which facilitates crop processing and reduces the space occupied by the equipment. is adopted.

Even if such a structure is adopted, in addition to the same effects as those of the above-described embodiments, the occupied space is reduced and crop processing becomes convenient.

[Fifth Embodiment] FIGS. 10 and 11 explain the fifth embodiment of the present invention, which basically connects the embodiment shown in FIGS. 6 and 7 to continuous casting equipment. This made it possible to cut between runs.

That is, wheels 37 are provided at the lower end of the housing 20,
It is made to be able to travel on rails 38 via the wheels 37, so that it can cut in accordance with the traveling speed of the material to be cut 30 that is continuously guided.

Note that a drive source 39 for rotating the rotating shaft 35 is provided so as to move together with the housing 20, and a drive means for moving the housing 20 is not shown.

[Sixth Embodiment] FIGS. 12 and 13 explain a sixth embodiment of the present invention, and this embodiment is an example applied to cutting a wide workpiece 42 such as a slab. This is an indication.

In this embodiment, a pair of left and right housings 40 and 40 are provided, and an upper and lower tool rest 2 is provided between the two housings 40.
1.22 is attached so that it can be raised and lowered.

A pair of upper and lower blades 41 having the same tapered cross section are fixed to each of the tool rests 21 and 22, respectively.

The widths of the upper and lower tool rests 21 and 22 and each of the blades 41 are set sufficiently wide, and are provided according to the width of the wide material to be cut 42.

As shown in FIG. 12, each housing is provided with screw shafts 25 on the upper and lower sides, and the upper and lower cutters 41, 41 are synchronized by a drive mechanism similar to that shown in FIGS. 4 and 5. The cut material 42 can be cut without creating a burr.

If such a structure is adopted, even a wide material to be cut can be reliably cut, no burrs will be formed, no sagging defects will occur even after rolling, and the material yield will be high.

As is clear from the above description, according to the present invention, a pair of tapered cutting blades are provided facing each other on both sides, sandwiching the material to be cut, and each blade is connected to a tool rest or a screw shaft on both sides. However, each screw shaft is screwed into a nut fixed to the tool rest or housing side, and the rotation of the screw shaft causes the blade to approach and move away via the screw shaft. The shaped cutter bites into the material to be cut and can cut the material into a tapered shape in cross section, so no burrs are formed and no sagging defects occur even after rolling. There is no need to cut and remove, and the material yield is good.

[Brief explanation of the drawing]

FIGS. 1(a) to (c) explain the cutting state of a conventional cutting machine, and FIG. 1(a) shows the state before cutting,
Fig. 1(b) is an explanatory diagram showing the state immediately after cutting, Fig. 1(c) is an explanatory diagram showing the state of the cut material, and Fig. 2(a)
) to (C) show the rolled state of the material cut by the conventional cutting method, Fig. 2 (&) is a front view showing the state at the start of rolling, and Fig. 2 (b) shows the rolled material. FIG. 2(C) is a plan view showing one example, FIG. 2(C) is a perspective view showing another example of the rolled material, and FIGS. 3 to 13 illustrate different embodiments of the present invention. FIG. 3 is a longitudinal sectional front view of the first embodiment, FIGS. 4 and 5 are a partially longitudinal sectional side view and front view illustrating the second embodiment of the present invention, and FIGS. 6 and 7 are A partially longitudinal side view and a front view showing a third embodiment of the present invention, FIGS. 8 and 9 are a partially longitudinal side view and a front view showing a fourth embodiment of the present invention, and FIGS. FIG. 11 is a front view and a side view showing a fifth embodiment of the present invention, and FIGS. 12 and 13 are a side view and a front view showing a fifth embodiment of the present invention. 9... Cutting device, to, ti... fixed plate, 12゜1
3.25...screw shaft, 12a, 12b, 13a. 13b, 25a...Threaded part, 14.21...Upper tool post, 15, 16.26...Nut, 17.22...
・Lower tool rest, 18, 23.41...Knife, 19°3
0.42... Material to be cut, 20.40... Housing, 24.29... Thrust bearing, 27... Spline portion, 28... Worm wheel, 31° 35
...Rotating shaft, 33.34...Bevel gear, 36...Worm gear, 37...Wheel, 38...Rail, 39
... Drive source patent applicant Ube Industries, Ltd. Figure 1 (a) Figure 1 (b) Figure 1 (C
)Figure 2 (a) Figure 3Figure 4Figure 5Figure 6Figure 7Figure 8Figure 12Figure 13

Claims (3)

[Claims] (1) A pair of tapered blades are arranged facing each other on both sides of the material to be cut, and each of the blades is connected to a screw shaft that is screwed into a nut fixed to the tool rest or housing, and each A cutting device characterized in that it is configured to be driven by the vertical movement of a nut or screw shaft by rotation of the screw shaft. (2) The cutting device according to claim 1, wherein the screw shafts that drive each blade are driven by synchronous control of separate drive sources. (3) Provide a means for transmitting driving force to the pair of blades,
The cutting device according to claim 1, characterized in that the pair of blades are driven synchronously by one drive source.