JPH0553850U - Internal welding bead polishing device for plate bending pipe - Google Patents

Abstract

(57) [Summary] [Purpose] To achieve a good finished condition by automatically polishing for a short time. [Structure] A traveling carriage 14 is provided which is capable of traveling in the longitudinal direction of a plate bending tube 7 formed by bending a plate and welding sides together, and the traveling carriage 14 is vertically moved around a tilting central axis 17 orthogonal to the longitudinal direction. The grinder main body 18 is tiltably attached to the grinder main body 18, and an extension arm 20 that extends in the longitudinal direction from the grinder main body 18 and can be inserted into the plate bending pipe 7 is provided in a protruding manner. The grindstone 26 is rotatably attached to the tip of the extension arm 20. Hold.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a bead polishing device for an inner surface welded plate bending pipe.

[0002]

[Prior Art]

 By winding one plate and welding the abutting portions of the sides together, a plate bending tube 1 as shown in FIG. 5 is formed.

As shown in FIG. 6, since the plate bending pipe 1 is welded from the outer peripheral side by applying the backing material 3 to the inner peripheral side of the abutting portion 2, the portion on the inner peripheral side of the weld bead 4 is welded. This will cause back waves on the inner surface of the weld bead 4, and the inner peripheral portion of the weld bead 4 needs to be polished.

Conventionally, a pipe having an air grinder attached to the tip of a replenishment type pipe is used to allow an operator to manually touch the inner peripheral side of the welding bead 4 along the longitudinal direction 5 of the plate bending pipe 1. I was polishing in the work.

[0005]

[Problems to be solved by the device]

 However, the above-mentioned conventional inner surface weld bead polishing apparatus for a bent plate tube has the following problems.

That is, an operator uses an add-on type pipe with an air-type grinder attached to the tip of the pipe, and an operator manually works the inner peripheral side of the welding bead 4 along the longitudinal direction 5 of the plate bending pipe 1. Since it had to be ground in place, it took a lot of work, and because the grinder's support was uncertain and the force could not be transmitted to the grinder well, it took a long time to polish and the finished condition was not very good.

In view of the above-mentioned circumstances, the present invention aims to provide an inner surface weld bead polishing apparatus for a plate bending pipe, which is capable of automatically polishing for a short time to obtain a good finished state. It is a thing.

[0008]

[Means for Solving the Problems]

 The present invention provides a traveling carriage capable of traveling in the longitudinal direction of a plate bending pipe formed by bending a plate and welding the sides together, and vertically tilting the traveling carriage around a tilting central axis orthogonal to the longitudinal direction. It is characterized in that a grinder main body is mounted as possible, an extension arm extending from the grinder main body in the longitudinal direction and capable of being inserted into a plate bending tube is projected, and a grindstone is rotatably held at the tip of the extension arm. This is related to the internal bead polishing device for plate bending pipes.

[0009]

[Action]

 According to the present invention, the welding bead formed at the welded portion on the inner surface of the plate bending tube is polished by rotating the grindstone and causing the traveling carriage to travel toward the plate bending tube.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention.

In the figure, 6 is a pair of tube fixing bases that support the vicinity of both ends of the plate bending pipe 7 so that the height can be adjusted. The pipe fixing bases 6 are, as shown in FIG. It is composed of a leg portion 8, a pipe support portion 9 that can be raised and lowered along the elevation guide leg portion 8, and a jack portion 10 that adjusts the height of the pipe support portion 9.

A rack rail 12 extending in the longitudinal direction 11 of the plate bending pipe 7 held by the pipe fixing base 6 is laid on a floor surface or the like, and a traveling carriage 14 having toothed wheels 13 is mounted on the rack rail 12, A tilting frame 16 is provided on a traveling carriage 14 via a turntable 15, and the tilting frame 16 has a substantially hollow cylindrical shape extending in the longitudinal direction 11 via a horizontal tilting central shaft 17 orthogonal to the longitudinal direction 11. A grinder main body 18 is pivotally supported so as to be vertically tiltable, and a tilting jack 19 is interposed between the grinder main body 18 and the tilting frame 16.

A hollow extension arm 20 extending in the longitudinal direction 11 and capable of being inserted into the plate bending tube 7 is provided at an end of the grinder body 18 on the plate bending tube 7 side, and the extension arm 20 and the grinder are connected to each other. A rotary shaft 21 extending in the longitudinal direction 11 is inserted and supported inside the main body 18, and an end portion of the rotary shaft 21 protruding from the grinder main body 18 is provided with a grinder main body 18 part via a pulley 22, a belt 23, and a pulley 24. A motor 25 fixed to the above is connected, and a circular grindstone is replaceably attached to the end of the rotary shaft 21 protruding from the extension arm 20.

Further, as shown in FIG. 2, an L-shape and an inverted L-shape having vertical portions 28 extending upward from the end portion of the horizontal portion 27 on the side opposite to the grindstone 26 at the left and right positions of the extension arm 20 tip portion. A bent portion of a pair of guide links 29 each having a shape of a circle is pivotally supported so as to be vertically tiltable, and a grindstone 26 is provided along the both sides of the weld bead 30 of the plate bending pipe 7 at the tip of the horizontal portion 27 of each guide link 29. A guide shaft 31 for guiding the guide shaft is pivotally supported, and a connecting shaft 32 parallel to the tilting central shaft 17 is mounted between the upper ends of the respective guide links 29, and a rotary joint 33 is provided in the central portion of the connecting shaft 32. One end of the screw shaft 34 parallel to the extension arm 20 is rotatably held, nuts 35 are screwed in the vicinity of both ends of the screw shaft 34, and the nut 35 is fixed to the extension arm 22. At the other end of the shaft 34, Install the dollar 36.

Next, the operation will be described.

First, the welding bead 30 is supported on the upper part of the pair of pipe fixing bases 6 in the vicinity of both ends of the plate bending pipe 7 with the welding bead 30 directed downward, and the height of the pipe fixing base 6 is adjusted. Try to be horizontal.

At the same time, the traveling carriage 14 is placed on the rack rail 12 with the grindstone 26 facing the plate bending tube 7 side, and the tilting jack 19 is used to adjust the grinder main body 18 to be substantially horizontal.

At this time, the height of the pipe fixing base 6 is adjusted so that the height of the grindstone 26 and the position of the weld bead 30 on the inner surface side of the plate bending pipe 7 become substantially equal.

Then, the handle 36 is turned to rotate the screw shaft 34 and move the position of the screw shaft 34 with respect to the extension arm 22 in the longitudinal direction 11, thereby tilting the guide link 29, and thereby the guide link 29. The height of the guide roller 31 attached to the work link 29 is adjusted to the same height as the lower portion of the grindstone 26.

In this state, the traveling carriage 14 travels toward the plate bending tube 7 side and moves so that the grindstone 26 is at the position immediately before being inserted into the opening of the plate bending tube 7.

Here, the tilting jack 19 is slightly contracted to tilt the grinder main body 18 and the extension arm 20 so that the heights of the lower portions of the grindstone 26 and the guide roller 31 become the high positions after cutting. Fine-tune to.

When the above preparations are completed, the motor 25 is driven and the grindstone 26 is rotationally driven via the pulley 24, the belt 23, the pulley 22, and the rotary shaft 21 to move the traveling carriage 14 to the plate bending pipe 7 side. And move it little by little.

Then, the grindstone 26 is inserted into the plate bending pipe 7, and the welding bead 30 is polished by the grindstone 26.

Thus, by using the inner surface weld bead polishing apparatus for a bent plate according to the present invention, it is possible to perform automatic polishing for a short time and obtain a good finished state.

Here, by providing a pair of left and right guide rollers 31 to guide both sides of the welding bead 30, even when the grindstone 26 is rotated at high speed, the wobble of the grindstone 26 is prevented, and thus, Highly accurate polishing can be performed.

Further, since the height of the guide roller 31 can be adjusted, it is possible to finely respond to the reduction of the grindstone 26.

Further, by providing the turntable 15 and touching the grindstone 26 to the left and right, a portion within a certain range in the vicinity of the welding bead 30 can be easily polished.

Further, since the grindstone 26 can be tilted up and down by the tilting jack 19 and the like, when the welding bead 30 is gradually polished in a plurality of times, the height of the grindstone 26 can be increased. Fine adjustment becomes easy.

In addition, since the traveling carriage 14 having the toothed wheels 13 is placed on the rack rail 12, the traveling carriage 14 slips due to the resistance during polishing and cannot travel, and the position of the traveling carriage 14 is reduced. Is prevented from going mad.

Further, even when the plate bending pipe 7 is a gradually expanding pipe or a gradually contracting pipe as shown in FIG. 4, the pipe fixing base 6 is provided with the gradually expanding pipe or the gradually contracting pipe so that the welding beads 30 become horizontal. Can be polished by arranging.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

[0033]

[Effect of the device]

 As described above, according to the apparatus for internally welding bead polishing of a plate bending pipe of the present invention, it is possible to achieve an excellent effect that a desired finished state can be obtained by performing automatic polishing for a short time.

[Brief description of drawings]

FIG. 1 is a partially cutaway schematic side view of an embodiment of the present invention.

FIG. 2 is a perspective view in which a guide roller portion is partially omitted.

FIG. 3 is a schematic front view of a tube fixing base.

FIG. 4 is a side view of a gradually expanding tube or a gradually contracting tube.

FIG. 5 is a perspective view of a plate bending tube.

FIG. 6 is a front view of a plate bending tube.

[Explanation of symbols]

 7 Plate Bending Tube 11 Longitudinal Direction 14 Traveling Cart 17 Tilt Center Axis 18 Grinder Main Body 20 Extension Arm 26 Grindstone

Claims (1)

[Scope of utility model registration request] 1. A traveling carriage that is capable of traveling in the longitudinal direction of a plate bending tube formed by bending a plate and welding sides together, and vertically tilts on the traveling carriage around a tilting central axis orthogonal to the longitudinal direction. A plate characterized in that a grinder main body is attached as much as possible, an extension arm extending from the grinder main body in the longitudinal direction and capable of being inserted into the plate bending tube is projected, and a grindstone is rotatably held at the tip of the extension arm. Internal weld bead polisher for bent pipes.