JPH024792Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] The present invention relates to a self-propelled groove forming machine for forming a groove for welding on the end face of a workpiece, particularly a pipe-shaped workpiece such as a column. It is something.

[Background technology] Self-propelled bevelling machines of this type usually run on rails installed parallel to the end surface of the workpiece, and this type of bevelling machine runs on a rail that is installed parallel to the end surface of the workpiece. It is not suitable for cutting a bevel on the end face of a workpiece. For this purpose, a method has been proposed in which a plurality of rollers installed in a processing machine are brought into contact with the front and back surfaces of the workpiece, and these rollers are driven to rotate, as shown in Japanese Patent Publication No. 52-39776. Furthermore, in the above publication, in order to stabilize the running direction, the axis of the rotatably driven roller is tilted with respect to the end surface of the workpiece, so that the direction of action of the driving force of the roller is far from the end surface of the workpiece. It is also shown that the actual traveling direction is parallel to the end surface of the workpiece, in addition to regulation of the traveling direction by a pair of contact portions that contact the end surface. FIG. 1 shows this conventional example. In the figure, 1 is the frame, 2 is the gas fuser, 3 and 4, 4
is a roller, and this roller 3 is driven by a motor 5 serving as rotation driving means. One roller 4 and roller 3 are brought into contact with the surface of the workpiece, and the other roller 4 is brought into contact with the back surface of the workpiece, and the rollers 3 and 4 are brought into contact with the workpiece by a spring 5. I'm trying to get cold. Here, the axis of the roller 3 is inclined with respect to the end surface of the workpiece, and the direction of action of the driving force is directed away from the end surface of the workpiece, as shown by the arrow in the figure. Further, a pair of contact portions 7, 7 located at the front and rear of the gas fuser 2 in the traveling direction are adapted to contact the end surface of the workpiece. These allow the running direction to be parallel to the end surface of the workpiece.

However, this product had the following drawbacks. In other words, beveling is performed using a gas cutter, and the "slag" generated at this time adheres to the end surface of the workpiece and comes into contact with the contact portion. This makes the running unstable and the groove becomes uneven.

[Purpose of the invention] The present invention was devised in view of these points, and its purpose is to perform stable running and form a uniform bevel with a gas cutter. To provide a self-propelled beveling machine.

[Disclosure of the Invention] The present invention includes a gas cutter that grooves the end face of a workpiece, a plurality of rollers that roll on the front and back surfaces of the workpiece in a direction along the end face of the workpiece, The rollers are equipped with a pressure means for pressurizing the workpiece, a contact portion for controlling the running direction that contacts the end surface of the workpiece, and a rotational drive means connected to the rollers. In machines that perform beveling on the end face of an object while self-propelled in the direction along the end face of the workpiece, the contact part is located in front of the fuser in the running direction, and the contact part is attached to the end face of the workpiece. It is equipped with a magnetic body so that the "slag" does not come into contact with the contact part, and the contact part and the end surface of the workpiece are always in stable contact. be.

The present invention will be described in detail based on the embodiments shown in FIG. Two shafts 8 and 9 connected to the motor 5 through gears are attached, and rollers 3 and 4 are attached to each shaft 8 and 9, respectively. On the other hand, a roller 6 is freely rotatably attached to the lower piece 12 of the frame 1 via a pressure means 13, and furthermore, a gas fuser 2 is attached to the side piece 14 of the frame 1.
is installed. Further, the inner surface of the side piece 14 serves as a contact surface 7 that comes into contact with the end surface of the workpiece 10.

The pair of axes 8 _and 9 are not parallel to each other, and as is clear from _FIG . Among the rollers ₃ and 4 attached to the respective shafts 8 and ₉ , only the roller 3 on the side closer to the side piece 14 is fixed to the shafts 8 and 9, and The roller 4 on the side far from the piece 14 is attached to shafts 8 and 9 so as to be freely rotatable. This is because the direction of action of the driving force by the roller 3 driven by the motor 5 is as shown by the arrow in the figure.
The direction is directed away from the end face of the workpiece 10 sandwiched between the roller 6 and the roller 6.
The contact surface 7 is always brought into contact with the end surface of the workpiece 10.

Here, there is only one contact surface 7, and the contact surface 7 is arranged on the front side of the gas fuser in the running direction. A permanent magnet 8 is provided on the contact surface 7 so that the contact surface 7 is attracted to the end surface of the workpiece 10.

However, in the case of a lever beveling machine, the motor 5
When the roller 3 is driven by the roller 3, it travels in a direction parallel to the end surface due to the acting direction of the driving force and the regulation of the traveling direction by contact with the end surface of the contact surface 7. And during this run, the gas fuser 2
When operated, a groove is formed on the end surface of the workpiece 10. Even if the "slag" generated during the formation of the groove by fusing adheres to the groove surface, the contact surface 7 is located in front of the gas cutter 2 and does not come into contact with the groove surface.
There is no possibility that running becomes unstable due to "slag". In addition, since the shaft located at the rear in the running direction is tilted, when the workpiece 10 such as a column has a small radius of curvature, the roller attached to the tilted shaft 9 and the workpiece Due to the force acting on the curved surface of the object 10 to correct the inclination of the axis 9,
The contact surface 7 tries to separate from the end surface of the workpiece 10, but since the contact surface 7 is provided with a permanent magnet 8 and exerts a magnetic attraction force between it and the end surface, the contact surface 7 and the end surface try to separate from each other. Contact with the end surface of the workpiece 10 is maintained, the traveling direction does not become unstable, and a uniform groove is formed.

In the illustrated embodiment, it is assumed that the direction of action of the driving force is not parallel to the end surface of the workpiece 10, but due to this and the contact surface 7, the running direction is made parallel to the end surface of the workpiece 10. Axis 9
The running direction may be controlled only by the permanent magnet 8 provided on the contact surface 7 without tilting the contact surface 7. Further, an electromagnet may be used instead of a permanent magnet.

[Effects of the invention] In the present invention, as mentioned above, the contact surface is placed in front of the gas cutter in the traveling direction, and the contact surface is further provided with a magnet that attracts the end surface. Even if the "slag" generated when the gas cutter forms a groove adheres to the groove surface, the contact of the contact surface for controlling the running direction with the end surface of the workpiece will be affected by this. Therefore, the contact surface and end surface always make smooth contact, and the bevel can be formed to be uniform in order to ensure stable running.

[Brief explanation of the drawing]

1A and 1B are a side view and a plan view of a conventional example, FIG. 2 is a plan view of an embodiment according to the present invention, and FIG. 3 is a sectional view of the same, where 2 is a gas fuser, 3, 4 is a roller, 7 is a contact surface, and 8 is a magnet.

Claims (1)

[Scope of utility model registration request] A gas cutter for beveling the end face of a workpiece;
A plurality of rollers that roll on the front and back surfaces of the workpiece in a direction along the end surface of the workpiece, a pressure means that pressurizes these rollers against the workpiece, and an end surface of the workpiece. a contact part for controlling the running direction that contacts the
It is equipped with a rotational drive means connected to a roller and performs beveling on the end face of the workpiece while self-propelled in the direction along the end face of the workpiece, and the contact portion is located at a position lower than the fuser in the running direction. A self-propelled bevel processing machine that is located at the front and is equipped with a magnet body that attracts the end surface of the workpiece at this contact part.