JPH0641061B2 - Material clamping method for round steel cutting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a material clamping method in a round steel material cutting machine for simultaneously cutting two round steel materials with a cemented carbide saw blade.

[Prior Art] When cutting a relatively large-diameter round steel material with a cemented carbide cutting machine, generally, one round steel material is clamped and cut to one, but two pieces are cut. It goes without saying that the work time can be greatly shortened and the efficiency can be improved by simultaneously clamping and simultaneously cutting two pieces. 2 pieces of round steel
When attempting to simultaneously cut this, there is a possibility that the round steel material cut into two pieces in the conventional cemented carbide cutting machine may move immediately after the cutting and damage the cemented carbide tip brazed to the saw blade.

FIG. 4 and FIG. 5 show a conventional clamping mechanism of this kind of cemented carbide cutting machine. In the clamp mechanism shown in FIG. 4, a ruler piece b is vertically fixed to one side of the horizontal plane a, and a pressure reducing plate d which is moved up and down by a fluid cylinder e is provided so as to face the horizontal plane a, and the ruler piece b is also provided. A sandwiching piece f that moves horizontally back and forth by a fluid cylinder e is provided so as to face each other. In this case, the horizontal surface a is lower than the roller gang level when 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 is provided with a wedge-shaped pressing piece h in place of the sandwiching piece f of the clamping mechanism shown in FIG. 4, and the pressing piece h slides on the horizontal plane a by the operation of the fluid cylinder e. It was done like this.

However, the mechanism shown in FIG. 4 is unstable because there is no support from below the round steel material. When two round steel materials are clamped by such a clamping mechanism, as shown in FIG. It is extremely unstable and has the drawback of always moving after cutting. Although the mechanism shown in FIG. 5 is more stable than the mechanism shown in FIG. 4, when two round steel members are clamped at the same time when they are curved, as shown in FIGS. 7 and 8. Since both round steel materials g and g'can only be supported at one or two points, movement after cutting was inevitable.

Further, the material clamping mechanism for a band saw machine disclosed in Japanese Utility Model Publication No. 59-32493 has a large number of round steel materials having a relatively small diameter in a V-shaped portion formed between a pair of equilateral triangular feeding vices. However, there is a problem that even if two large-diameter round steel materials are to be sandwiched by this, the two objects cannot be stably sandwiched in parallel in the horizontal plane. .

[Means for Solving Problems] Therefore, the present invention is intended to provide a material clamping method for a round steel cutting machine equipped with a clamp mechanism capable of stably sandwiching two round steel materials at the same time. To this end, the present invention is provided with a clamping mechanism that clamps two round steel materials at a time on both sides of the saw blade in a symmetric manner, and the clamping mechanism is an upper surface of two circular steel materials juxtaposed on a horizontal plane. The pressing plate straddling the upper and lower sides is arranged so as to move up and down by the operation of the liquid cylinder, and the pair of wedge-shaped pressing pieces that respectively support the lower edge outer surfaces of both round steel members are movable by the other fluid cylinders. It is characterized in that after arranging and pressing down the reduction plate at a low pressure, a pair of pressing pieces are advanced at a high pressure to bring the two round steel materials into close contact, and after that, the reduction force of the reduction plate is switched to a high pressure. It is a thing.

[Operation] By advancing the pressing piece in a state in which the pressing plate is pressed at a low pressure, both round steel materials can be securely brought into close contact with each other to be clamped.

[Embodiment] Next, an embodiment of the present invention will be described with reference to FIGS. In the figure, reference numerals 1 and 1'denotes a round steel material that is conveyed horizontally by a conveying rotor 2 and 2 ', and 3 indicates a circular saw blade with a cemented carbide tip that moves horizontally while rotating to cut the round steel material. Reference numerals 4 and 4 ′ are clamp mechanisms provided at positions symmetrical to both sides of the saw blade 3. Clamping mechanism 4, 4'is horizontal 12
The pressure reducing plate 5 which can straddle the upper surfaces of the two round steel materials 1 and 1'arranged side by side is arranged so as to be moved up and down by the operation of the fluid cylinder 6, and the outer surface of the lower edge of both round steel materials 1 and 1'is arranged. The wedge-shaped pressing pieces 7 and 8 which respectively support the fluid cylinders 9 and
It is arranged so as to be movable by 10. That is, the fluid cylinder 9 is arranged vertically 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 is pressed. Is configured to slide on the horizontal plane 12 by the operation of the fluid cylinder 10. When clamping two round steel materials 1, 1'by this clamp mechanism, first, hydraulic oil is supplied to the fluid cylinder 6 at a relatively low pressure to bring the pressure plate 5 onto the upper surfaces of both round steel materials 1, 1 '. Reduce at low pressure. In that case, if the round steel materials 1 and 1 ′ are curved, the heights of the upper surfaces of the two round steel materials 1 and 1 ′ can be different. It does not straddle steel materials 1 and 1 '. Subsequently, the fluid cylinders 9 and 10
At the same time, hydraulic oil is supplied at a high pressure so that both wedge-shaped pressing pieces 7 and 8 are advanced in the direction of the arrow and both round steel materials 1 and 1'are pushed up and brought into close contact with each other. At that time, the rolling plate 5 presses the round steel materials 1, 1 ′ at a low pressure.
Depending on its curved state, 1'may rotate and come into close contact with itself. After that, the pressure of the hydraulic oil in the fluid cylinder 6 is switched to a high pressure, and the pressing plate 5 is strongly pressed down on both round steel materials 1 and 1 '. As a result, the round steel materials 1 and 1'are brought into close contact with each other as shown in FIG. 1, the pressing pieces 7 and 8 are supported on the outer surface of the lower edge, and the pressing plates 5 are pressed down from above to stably clamp the materials. The state is obtained.

The two round steel materials 1 and 1'sandwiched in this way are cut by the saw blade 3 moving horizontally between the two clamping mechanisms 4 and 4 '. Is stable, there is no possibility of damaging the saw blade 3 without moving after cutting. Although not shown, when the saw blade 3 retreats, both clamping mechanisms 4 and 4'move outwardly to widen the interval so that the saw blade can be retreated smoothly.

In the embodiment shown in FIG. 3, instead of the vertically arranged pressing piece 7 and fluid cylinder 9 of the embodiment shown in FIG. 1, the pressing piece 14 and the fluid cylinder 15 are horizontally arranged so as to slide on a horizontal plane 12.
In this configuration, the pressing piece 14 may press the outer surface of the lower edge of the round bar 1.

In this way, two round bar materials 1, 1'are horizontally arranged in a pressure contact state and the saw blade 3 is moved horizontally to continuously cut both round steel materials 1, 1 '. Then, there is also an advantage that the round steel material cut earlier does not generate burrs, and the number of required deburring processes is halved.

[Effects of the Invention] As described above, according to the clamping method of the present invention, the pressure reduction plate across the two round steel materials is first reduced at a low pressure, and then the pair of left and right pressing pieces are advanced to move the round steel material. Since they were brought into close contact with each other and then the pressing plate was pressed at a high pressure, the round steel material was
It is possible to hold the book all together in a stable manner. Therefore, it is possible to simultaneously cut two pieces by a cutting machine, and there is a beneficial effect that the processing capacity is significantly improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an essential part showing an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a vertical sectional view showing another embodiment. 4 and 5 are longitudinal sectional views showing a conventional clamp mechanism, FIG. 6 is an operation state diagram of FIG. 4, FIG. 7 is an operation state diagram of FIG. 5, and FIG. 8 is an operation state diagram of FIG. It is a top view. 1,1 '... Round steel, 4,4' ... Clamping mechanism, 5 ...
… Reduction plate, 7, 8 …… Pressing piece, 6, 9, 10 …… Fluid cylinder, 12 …… Horizontal plane.

Claims (1)

[Claims] 1. A clamping mechanism for sandwiching two round steel materials together is provided at symmetrical positions on both sides of a saw blade, and the clamping mechanism extends over the upper surfaces of the two round steel materials juxtaposed on a horizontal plane. The pressing plate is arranged so that it can be moved up and down by the operation of the liquid cylinder, and a pair of wedge-shaped pressing pieces that respectively support the outer surfaces of the lower edges of both round steel members are arranged so that they can be moved by other fluid cylinders. After reducing the pressure plate at a low pressure, a pair of pressing pieces are advanced at a high pressure to bring the two round steel materials into close contact with each other, and then the pressure force of the pressure plate is switched to a high pressure. Material clamping method for cutting machine.