JPS63216612A - Beveling device - Google Patents

Abstract

PURPOSE:To uniformly finish a cut face by supporting a cutting edge which is revolved along the end face of a rectangular pipe swingably in the radial direction of said rectangular pipe and energizing said cutting edge toward the rectangular pipe by using the expansion/contraction of a spiral spring. CONSTITUTION:A cutting edge 3 which revolves along the outer periphery of the end face of a rectangular pipe 1 while rotating is provided in a beveling device. The cutting edge 3 is strongly pressed against the end face 2 of the rectangular pipe 1 by the energizing force of a spiral spring 5 via an arm 4. The cutting edge 3 is formed into a tapered shape so as to give a taper-form beveling to the end face 2. Further, the cutting edge 3 can be smoothly revolved along the outer peripheral face of the rectangular pipe 1 by means of a guide roller 6. Hence, the cutting edge 3 is pressed against the end face 2 while being rotated, and the guide roller 6 is revolved along the outer periphery of the rectangular pipe 1 while being pressed without variation in load. Thereby, the finish of beveling of the end face 2 can be uniformly carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the configuration of a beveling device for bevelling an end face of a square pipe in order to weld it.

(Conventional technology) Conventionally, when beveling the end face of a square pipe, in other words, chamfering the end face, unlike a round pipe, there is a corner on the outer periphery, so the cutting blade is rotated uniformly along the outer periphery. This is difficult and generally relies on manual labor.

However, when a large amount of this type of work is to be performed, manual work may cause problems such as time required for the entire work and decreased reliability due to uneven finish.

For this reason, attempts are being made to achieve uniform finishing mechanically and to shorten processing time by eliminating manual labor.

However, unlike a round pipe, in the case of a square pipe, when the blade is rotated along the outer periphery, the position where the blade acts changes greatly between the corner part and the flat part in the radial direction, both of which cause problems with the quality of the finish. was there.

In addition, when trying to obtain satisfactory operation structurally, the overall size of the device becomes large, which not only impairs its mobility, but also increases the price and makes manual work more economical. .

(Problems to be Solved by the Invention) It is an object of the present invention to provide a beveling device that can solve these problems and accurately bevel the end face of a square pipe.

(Means for solving the problem) The present invention provides a blade that rotates along the end face of a square pipe,
This problem is solved by supporting this blade so that it can swing in the radial direction of the square pipe and urging the blade against the square pipe by utilizing the expansion and contraction of the spiral spring in the spiral direction.

(Function) In order to smoothly swing the beveling blade along the outer periphery of the square pipe, the blade swings using the elasticity of the spiral spring to accommodate large swings of the square pipe. , it is possible to perform smooth biasing within the range of oscillation and uniform cutting.

) (Example) FIG. 1 is a longitudinal sectional view of a main part of bevel processing according to an embodiment of the present invention, and FIG. 2 is a side view of the main part.

In FIG. 1, the beveling device is provided with a blade 3 that rotates along the outer circumference of the square pipe 1 at an end 2 of a square pipe 1, and the blade 3 is connected to a spiral spring via an arm 4. It is biased toward the axis of the square pipe 1 by the spring action in the spiral direction of the pipe 5.

The blade 3 is supported by a portion (not shown) of the arm 4 so as to be able to swing in the radial direction of the square pipe 1, and is strongly pressed against the end surface 2 of the square pipe 1 by the bias of the spiral spring 5.

Furthermore, the spiral spring 5 is configured such that its end portion is fixed to a support that supports the square pipe 1, and the spring action is configured so that the blade 3 is applied only to the end face 2 of the square pipe 1.

In addition, the beveling device includes a cutting blade 3 formed in a tapered shape so that the end face 2 of the square pipe 1 can be beveled in a tapered shape, and a portion of the taper is formed on the end face. 2 is positioned so as to exhibit a cutting action.

A guide roller 6 is provided to smoothly rotate the blade 3 along the outer circumference of the square pipe 1. When the blade 3 rotates along the outer circumference of the square pipe 1, the guide roller 6 is configured to determine the position of the blade 3 with respect to the end face 2.

Further, the outer periphery of the square pipe 1 is square, and when the blade 3 swings in the radial direction during rotation, the spiral spring 5 urges the blade 3 to act on the end portion 2 with a constant pressure.

The support device 7 fits into the internal space of the square pipe 1 and is securely and firmly fixed to the square pipe 1.The support device 7 is not easily fixed, as its position changes due to the reaction force of the blade 3, etc. The structure is such that strong fixation can be achieved internally using means such as an expander structure.

In FIG. 2, the spiral spring 5 is formed in a spiral shape, and is configured to act on the guide roller 6 in the spiral direction so as to be able to press against the outer periphery of the square pipe 1.

In such a configuration, when the beveling device is fixed to the square pipe 1 by the support device 7, the beveling device rotates the blade 3 and applies a pressing force to the end surface 2 of the square pipe 1 by the urging force of the spiral spring 5. , rotate the outer circumference of the square pipe 1.

Then, a tapered bevel is formed on the end face of the square pipe 1 by the cutting action of the blade 3.

Such an operation allows the guide rollers 6 to accurately guide the blade 3 along the outer circumference of the square pipe 1 even if the outer circumference of the square pipe 1 is square.

Moreover, when the guide roller 6 swings the blade 3 along the outer shape of the square pipe 1, the urging force of the spiral spring 5 acts with almost no change in the urging pressure due to the extremely large elasticity of the spiral spring 5. However, the load that changes with the swing of the rotation hardly changes, resulting in extremely smooth operation.

(Effects of the invention) Therefore, despite having great elasticity, the device can be made compact, and the operation is stable, there is no slight change in the cutting surface caused by the blade, and a uniform finish can be achieved. You will get it.

Therefore, even when welding is performed, the quality is stable and the reliability of the square pipes to be welded can be significantly improved.

In addition, since the beveling process is performed by mechanically rotating the blade, the machining speed is significantly faster than manual processing, which improves the efficiency of this type of work, and the effect is significant. .

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a main part of bevel processing according to an embodiment of the present invention, and FIG. 2 is a side view of the main part. 1・
...Square pipe, 2...End face, 3...Blade, 5...
・Spiral spring, 6...Guide roller.

Claims (1)

[Claims] A beveling device for bevelling the end of a square pipe for welding is provided with a blade that rotates along the end face of the square pipe, and this blade is supported so as to be swingable in the radial direction of the square pipe. A beveling device characterized in that the blade is biased against the square pipe by utilizing expansion and contraction in the spiral direction of a spiral spring.