JPS647027Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an arc air gouging device that automatically reverses a fillet weld between an annular web material and a cylindrical face material.

The inner shell frame, penstock, pressure vessel, etc. of a submersible, as shown in FIG. I try to do meat welding.
In particular, in the inner shell frame of a submersible, this fillet weld must be formed into a fully penetrated welded joint, so as shown in Figure 1b, which shows the cross-sectional structure of this fillet weld, After welding one side of the K groove and before welding the other side, it is necessary to remove at least the first layer in the weld bead 3 by performing a back chisel operation. This is because the other end of the web material 2 is not completely shielded when welding the one end, so the first layer may be rapidly cooled and receive excessive stress, which often contains various defects. It's for a reason.

Conventionally, in addition to mechanical cutting methods, arc air gouging is often used for such back chiseling work from the viewpoint of efficiency and ensuring welding quality. The shape of the gouging groove 4 varies depending on the operator, resulting in a large amount of time being spent on shaping the gouging groove 4 before welding.

The present invention aims to provide a device that can automatically perform arc air gouging in view of such problems in conventional back chiseling work, thereby eliminating the need for shaping the gouging groove and improving work efficiency. This is intended to be a significant improvement.

The configuration of the arc air gouging device for circumferential back chiseling of the present invention, which achieves the above-mentioned object, includes a cylindrical face material whose inner circumferential surface is fillet welded to the outer circumferential surface of a substantially horizontal annular web material. A trolley that straddles,
a gouging torch that is supported by a torch holder provided on the trolley and performs lifting of the back side of the joint between the web material and the face material; and a gouging torch that is rotatably attached to the trolley and placed on the upper end surface of the face material. a plurality of upper rollers, a plurality of side rollers that are rotatably attached to the truck and abut the inner and outer peripheral surfaces of the face material so as to sandwich the face material; a plurality of floating rollers that can be pressed against the upper end surface of the face material such that the upper roller rises from the upper end surface of the face material;
The apparatus is provided with an idler operating means that is provided between these idler rollers and the truck and moves the idler rollers up and down.

Therefore, the cart automatically travels using the face material of the present invention as a guide, and the fillet weld can be evenly reversed using the gouging torch, eliminating the need for shaping the gouging groove and improving the working environment. Together with this, it is possible to plan a significant improvement in work efficiency. Also, the floating roller operating means is operated to press the floating rollers against the upper end surface of the face material, and the upper roller is lifted from the upper end surface of the face material by the reaction force, and in this state, the floating roller pushes the upper end surface of the face material. Since the cart can be moved along the face material in a rolling manner, it is possible to quickly move the cart along the face material without driving the upper roller.

Hereinafter, please refer to FIG. 2 showing an overview of an embodiment of the arc air gouging device for circumferential back chiseling according to the present invention, FIG. 3 a showing the cross-sectional structure of the main part, and FIG. 3 b showing the planar shape thereof. This will be explained in detail.

A cylindrical face material 12 whose inner peripheral surface is joined to the outer peripheral surface of a substantially horizontal annular web material 11 has a cart 13 positioned so as to straddle this face material 12. is a pair of front and rear upper rollers 4 that come into contact with the upper end surface of the face material 12.
are rotatably supported via shafts 15,
A synchronous belt 16 is wound around these shafts 15. A drive belt 19 is wound around one of the shafts 15 and a drive pulley 18 of a drive motor 17 fixedly installed on the trolley 13. Therefore, the operation of the drive motor 17 causes the upper roller 14 to rotate synchronously and rotate the face. In order to roll on the upper end surface of the material 12, the cart 1
3 will move along the face material 12. In order to guide the movement of the cart 13 relative to the face material 12, the cart 13 includes a pair of front and rear inner rollers 20 that contact the inner peripheral surface of the face material 12, and a pair of front and rear outer rollers 21 that contact the outer peripheral surface of the face material 12. The outer roller 21 is supported at the tip of a holder 22 which is rotatably connected to the cart 13, and the holder 22 can be moved to any desired position according to the thickness of the face material 12. It can be fixed in a rotating position. In addition,
A torsion spring may be interposed between the holder 22 and the carriage 13, and the face material 12 may be held between the inner roller 20 and the outer roller 21 by the force of this spring. Further, it is also possible to attach only one of the inner roller 20 and the outer roller 21 to the central portion of the truck 13. A pair of front and rear idler rollers 2 are arranged parallel to the upper roller 14 and facing the upper end surface of the face material 12.
Roller holder 2 rotatably supports 3.
4 is attached to a bracket 25 provided on the trolley 13 so as to be able to move up and down, and an upward force is always applied by a spring material (not shown), so that the idler roller 2
3 is in a non-contact state with respect to the upper end surface of the face material 12. Therefore, by grasping the cart 13 and pushing in the knob 26 provided at the upper end of the roller holder 24, the floating roller 23 is pressed against the upper end surface of the face material 12, and the cart 13 is lifted up.
The trolley 13 can be freely moved to any position on the face material 12. In this embodiment, the roller holder 2 is used as a component of the idle roller operating means.
4, bracket 25, knob 26, etc., screws or other known means may be used. A torch holder 28 is provided on the trolley 13 to support the gouging torch 27 so that it can be directed in any direction.
The tip of a support rod 31 that protrudes in the radial direction via a flexible arm 30 from a rotating jig 29 provided concentrically with the face material 12 in order to maintain the posture of 3 is a bearing thruster 32 provided on the truck 13.
is mated to. Note that the reference numeral 33 in the figure is a control device for setting gouging conditions.

Therefore, the rotating jig 29 is positioned at the center of the face material 12, and the cart 13 is moved to the center of the face material 12.
After fitting one end of the support rod 31 to the bearing thruster 32 and connecting the other end to the rotating jig 29 via the flexible arm 30, the gouging torch 27 is moved to the web material 11 by operating the torch holder 28. The drive motor 17 is operated, and the gouging torch 27 is operated by the control device 33 to automatically perform back chiseling work.

[Brief explanation of the drawing]

Fig. 1a is a perspective view showing the external appearance of the workpiece that is the subject of the present invention, Fig. 1b is a sectional view thereof, and Fig. 2 is an implementation of the arc air gouging device for circumferential back chiseling according to the present invention. A work conceptual diagram showing the working state of the example, Figure 3 a is a sectional view showing the structure of the main part,
Fig. 3b is a plan view of the same, and the reference numerals in the figure are: 11 is a web material, 12 is a face material, 13 is a trolley, 14 is an upper roller, 17 is a drive motor, 20 is an inner roller, and 21 is an outer roller. , 23 is a floating roller, 24 is a roller holder, 25 is a bracket, 2
6 is a knob, 27 is a gouging torch, and 28 is a torch holder.

Claims (1)

[Scope of utility model registration request] A cart that straddles a cylindrical face material whose inner circumferential surface is fillet welded to the outer circumferential surface of a substantially horizontal annular web material, and a torch holder provided on this cart that supports the web material and the face material. The back of the joint part includes a gouging torch for lifting, a plurality of upper rollers each rotatably attached to the truck and placed on the upper end surface of the face material, and a plurality of upper rollers rotatably attached to the truck and driving the face material. a plurality of side rollers that come into contact with the inner and outer circumferential surfaces of the face material in a sandwiching manner; and a plurality of side rollers that are attached to the cart so as to be movable up and down, respectively, and an upper end surface of the face material such that the upper rollers are lifted from the upper end surface of the face material. An arc air gouging device for circumferential back chiseling, comprising a plurality of floating rollers that can be pressed against the floating rollers, and floating roller operating means that is provided between the floating rollers and the truck and moves the floating rollers up and down.