JPS6228115A - Round steel material cutting machine and its material clamping method - Google Patents

Abstract

PURPOSE:To cut two materials concurrently by a machine and improve its processing ability, by aligning the two steel materials, being a material to be cut, to be clamped by fluid cylinders through a depressing plate, simultaneously pressing the two materials from their upper surfaces, and a pair of wedge-shaped pressing pieces pressing the materials from their bottom surfaces. CONSTITUTION:A cutting machine arranges a depressing plate 5, placed extending over upper surfaces of two round steel materials 1, 1', so as to be lifted by a fluid cylinder 6. On the other hand, the machine arranges a pair of wedge-shaped pressing pieces 7, 8, which receive bottom edge outer side surfaces of the round steel materials to be supported, movably by fluid cylinders 9, 10. The cutting machine simultaneously cuts the two round steel materials 1, 1' to be cut by firmly clamping them by the depressing plate 5 and the pressing pieces 7, 8. Accordingly, the machine improves its processing ability of cutting.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a round steel cutting stage for simultaneously cutting two round steel materials using a carbide saw blade, and a method for clamping the material.

[Prior art] When cutting a round steel material using a carbide cutting machine, the general practice is to clamp the round steel material into one-thick-thickness and cut it into one-thickness-thickness. It goes without saying that cutting at the same time will greatly reduce work time and increase efficiency.

However, when attempting to cut two round steel pieces at the same time, with conventional carbide cutting machines, the two halves of the round steel pieces move immediately after cutting, and there is a risk of damaging the carbide tip soldered to the saw blade.

FIGS. 4 and 5 show the clamping mechanism of a conventional carbide cutting machine of this type. In the clamping mechanism shown in Fig. 4, a ruler piece is fixed perpendicularly to one side of a horizontal plane a, and a lowering plate d that is moved up and down by a fluid cylinder C is provided so as to face the horizontal plane a. A clamping piece f that is horizontally moved forward and backward by a fluid cylinder e is provided so as to face each other. In this case, the horizontal plane a is lower than the roller gang level at which the round steel material g is carried in to avoid collision, and there is a gap between the round steel material g and the horizontal surface a. On the other hand, the clamp mechanism shown in FIG. 5 has a wedge-shaped pressing piece in place of the clamping piece f of the clamping mechanism shown in FIG. It is designed to slide.

However, the mechanism shown in Fig. 4 is unstable because there is no support from below for the round steel pieces, and when two round steel pieces are clamped by the ramp mechanism, as shown in Fig. 6. It has the disadvantage that it is extremely unstable and always moves after cutting. In addition, even though the i4J shown in Fig. 5 is more stable than the mechanism shown in Fig. 4, if the round steel material is curved, when two pieces are held together at the same time, the mechanism shown in Figs. 7 and 8 will occur. In some cases, the Ryoko steel material g+g' was supported at only one or two points, and movement after cutting was unavoidable.

[Means for Solving the Problems] Therefore, the present invention aims to provide a round steel material cutting machine equipped with a clamping mechanism that can stably clamp two round steel materials even when two round steel materials are being clamped at the same time, and a material clamping method thereof. For this purpose, the clamp mechanism according to the present invention has a reduction plate that extends over the upper surfaces of the two round steel materials so as to be moved up and down by the operation of a fluid cylinder, and also supports the outer surfaces of the lower edges of both flange materials. A pair of wedge-shaped pressing pieces are arranged so as to be movable by respective fluid cylinders. Further, in the material clamping method using this clamping mechanism according to the present invention, after the rolling plate is rolled down at low pressure, a pair of pressing pieces is advanced at high pressure to bring both optical steel materials into close contact with each other, and then the rolling blade of the rolling plate is This feature is characterized in that the voltage is switched to high pressure.

[Example code] An embodiment of the present invention is shown in FIGS. 1 and 2. FIG.

In the figure, 1. L' is a round steel material that is transported horizontally by transport rollers 2 and 2'; 3 is a circular saw blade with a carbide tip that moves horizontally while rotating to cut the round steel material; 4.
Reference numeral 4' designates clamp mechanisms provided at symmetrical positions on both sides of the saw blade 3. The clamp mechanism 4, 4' consists of two round steel members 1, 1.
A reduction plate 5 extending over the upper surface of ' is arranged so as to be moved up and down by the operation of a fluid cylinder 6, and wedge-shaped pressing pieces 7 and 8 are arranged to support the outer surface of the lower edge of both optical steel members 1.1', respectively. Each is arranged to be movable by a fluid cylinder 9,10. That is, the fluid cylinder 9 is arranged directly on the button here, and the pressing piece 7
is moved up and down inside the ruler piece 11 by the operation of this fluid cylinder 9, while the other fluid cylinder 10 is arranged horizontally, and the pressing piece 8 is moved up and down by the operation of this fluid cylinder 10.
configured to slide on the top. In the clamp mechanism i structured as described above, first, hydraulic oil is supplied to the fluid cylinder 6 at a relatively low pressure, and the rolling plate 5 is rolled down onto the upper surface of both the optical steel members 1 and 1' at a low pressure. At this time, since the rolling blade of the rolling plate 5 is low, if the round steel materials 1 and 1' are curved, the two light steel materials 1. It does not mean that we approach each other across the world. Subsequently, high-pressure hydraulic oil is supplied to the fluid cylinders 9 and 10 at the same time, and the wedge-shaped pressing pieces 7.8 are advanced in the direction of the arrow to push up the optical steel members 1 and 1' and bring them into close contact with each other at the same time.

At this time, the round steel material 1° 1' rotates on its own axis depending on its curved state, and the rolling plate 5 elastically presses it down. Thereafter, switch the pressure of the hydraulic oil in the fluid cylinder 6 to a high pressure and forcefully roll down the roll-down plate 5 onto both the optical steel materials 1 and 1'.

As a result, the round steel members 1.1' are in close contact with each other, the outer surfaces of their lower edges are supported by the pressing pieces 7 and 8, and are rolled down by the rolling plate 5 from above, resulting in a stable clamping state. The two round fIfJ materials 1゜1' thus clamped are cut by the saw blade 3 moving horizontally between the two clamping mechanisms 4, 4'.
Since both optical steel materials 1 and 1' are held in a stable state, they do not move after cutting, and there is no risk of damage to the saw blade 3.

Although not shown in the drawings, when the saw blade 3 is retracted, both clamp mechanisms 4, 4' move outward to widen the gap between them (thus, the saw blade can be smoothly retracted).

The embodiment shown in FIG. 3 differs from the embodiment shown in FIG. 1 in that the pressing piece 7 is arranged vertically. In place of the fluid cylinder 9, a pressing piece 14 and a fluid cylinder 15 are provided horizontally so as to slide on a horizontal surface 12. With this configuration, the pressing piece 14 pushes the outer surface of the lower edge of the round steel material 1. It may be suppressed.

In this way, two round steel materials 1. The saw blades 3 are placed horizontally in a pressure-welded state, and the saw blade 3 is moved horizontally to cut the tip steel materials 1 and 1' into 1
Continuous cutting has the advantage of preventing burrs from forming on the previously cut round steel material, and reducing the number of burrs required to be removed by half.

[Effects of the Invention] Since it is possible to stably hold two round steel materials at once and to cut the two at the same time, there is a beneficial effect that the throughput of the cutting machine is greatly improved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a main part showing one embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a longitudinal cross-sectional view showing another embodiment. 4 and 5 are vertical cross-sectional views showing the conventional clamp @ side, FIG. 6 is a diagram of the operating state of FIG. 4, and FIG. 7 is a 1 m diagram of the operating state of FIG. 5. FIG. 8 is a plan view of FIG. 7. 1.1'... Round steel material, 4, 4'... Clamp mechanism, 5... Reduction plate, 7, 8... Pressing piece, 6, 9
゜10...Fluid cylinder. Patent applicant: Daido Steel Co., Ltd. No. 1 @ Fig. 2 Fig. 8 @ Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8

Claims (1)

[Claims] 1. Clamp mechanisms for collectively clamping two round steel materials are provided at symmetrical positions on both sides of the saw blade.
A rolling plate that spans the upper surface of the round steel material is arranged so as to be moved up and down by the operation of a fluid cylinder, and a pair of wedge-shaped pressing pieces that respectively support the outer surfaces of the lower edges of both steel materials are connected to the other fluid cylinders. A round steel material cutting machine characterized by being arranged so as to be movable. 2. Clamp mechanisms for clamping two round steel materials at once are provided at symmetrical positions on both sides of the saw blade.
A rolling plate that spans the upper surface of the round steel material is arranged so as to be moved up and down by the operation of a fluid cylinder, and a pair of wedge-shaped pressing pieces that respectively support the outer surfaces of the lower edges of both steel materials are connected to the other fluid cylinders. In a round steel material cutting machine that is movable by the following steps, after rolling down the reduction plate at low pressure, a pair of pressing pieces is advanced at high pressure to bring the two round steel materials into close contact, and then the reduction plate is rolled down. A material clamping method for a round steel material cutting machine, characterized in that the blade is switched to high pressure.