JPS59146750A - Grinding of groove part to be welded - Google Patents

Abstract

PURPOSE:To permit to remove rust, coating, separatable paint or the like easily from a groove part by a method wherein a synthetic fiber brush, having abrasive grains, is formed into a disc shape and is driven by a motor while the ends of plates to be welded are ground by abutting the circumferential surface of the brush. CONSTITUTION:The shaft 16 of the motor 15 is inserted through the hole 11 of the disc brush 10 and is secured thereto while the switch of the motor 15 is put ON to rotate the disc brush 10 and the circumferential surface 17 of the brush 10 is abutted against the groove parts 1a, 2a of the steel plates. The circumferential surface 17 of the disc brush 10 grinds the groove parts 1a, 2a under being rotated while the same is deformed gradually so as to be intimated with the sectional shape between the groove parts 1a, 2a and grinds the details of both end parts. Nylon or the like is used as the material of the disc brush 10, therefore, the deformation may be effected in a short period of time. The disc brush 10 removes efficiently the rust, coatings, or the separatable paint on both groove parts to be welded only, and the same 10 will never grind the metallic parts of both ends.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for polishing welding grooves in metals and welding grooves over a wide area, such as in high-pressure tanks.

[Prior art]

In buildings such as high-pressure tanks where many steel plates are welded, the steel plates 1 and 2 are butted together and temporarily fixed using a jig 3, as shown in Figure 1, and sometimes a backing plate 4 is fixed before each plate is welded. The groove portions 1a and 2a of the steel plate are welded. Be sure to polish the groove parts 1a and 2a before welding.
Rust must be removed from each surface. Bevel portions 1a and 2
Even if anti-rust paint or peelable paint is applied to a, these must be peeled off or polished again before welding, and in any case, the polishing work cannot be omitted.

,For this reason, it is difficult to do it conventionally. As a polishing means, wire brush or fixed abrasive grains are used. A method using an abrasive material, and a method using free abrasive grains. There are two types of sandplast methods. However, a wire brush. Use. Then,
If either paint or peelable paint is applied to the groove, it has the drawback of causing clogging. Also, when using a whetstone, it is the pth.

Clogging occurs, and the groove surface is scraped and deformed.

On the other hand, in the San1 Nolast method, high-pressure air and sand are circulated and sprayed onto the grooves to remove rust and paint. The disadvantage is that abrasion particles containing rust, paint, or sea salt particles may re-adhere to the grooves. Ru. Furthermore, the groove
If a backing plate is attached to the part, there is a possibility that abrasion powder may also enter between Vf1 between the groove part and the backing plate. It is clear that if these are left unattended and the welding is repeated from frame 1 to 11, defects will occur in the weld line.

[The purpose of light and light]

The present invention was made in view of the handwriting situation, and its purpose is to provide a polishing method that can easily remove rust, paint, peelable paint, etc. from the groove portion.

[Analysis of the invention (, trivial)]

In order to achieve such an object, in the present invention, an abrasive synthetic fiber brush is formed into a disk shape. The method is to apply pressure to the surface and polish it. This Ike's disc brush deforms over time to follow the shape of the gap in the groove, so it can efficiently remove rust, paint, etc., and it also prevents the surface of the groove from being scraped and deformed. . Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 2 shows the research method of the present invention (the oblique brush 10 that can be used with A hole 11 is drilled as shown in the figure.Disk shape/10 structure W
In order to make it easier to understand i, we enlarged part of the -= Σ -(, shown in Figure 2). Boiled 12 pieces.
At the end of λ1, a trigram-shaped resin I3 is formed, and on the surface of the resin 13 there are a large number of I1 (11.4) adhered to it. Silicon carbide ζ/1F is used, and the grain size and (f degree) are manufactured from bar 1-' to sonoto tieno depending on the grain size and the material to be polished.

An example of how such a disc brush 10 is used is shown in FIG. First, the IK controller 1iIiII 16 is inserted into the hole J of the disc brush 10 and firmly fixed. Next, turn on the motor 15 and turn on the noise brush 1.
0 is rotated to press the circumferential surface 17 of the plan 10 between the groove portions 1a and 2a of the steel plate. Disc brush 10
The circumferential surface 17 polishes the groove portions 1a and 2a while rotating t~, and gradually deforms along the cross-sectional shape between the groove portions 1a and 2a2, and also polishes the fine details.

Since a synthetic resin such as nylon is used as the material for the disc brush 10, the above-mentioned deformation can be performed in a short time. Also, the disc brush 10 has rust on the surface of the groove,
Efficiently removes only paint and strippable paint without grinding down to metal parts.

The disk grinder 10 may perform the polishing work while being driven by a motor by an operator, or it may be connected to a robot or a general polishing machine to perform the polishing work automatically.

According to experiments, the rotation speed of Puisukunorashi 10 is 5000r
, p, and m were sufficient.

〔Effect of the invention〕

As shown diagonally above, by the polishing method of the present invention, the bath contact groove portion 'f! : Rust, paint and peelability on the surface of the groove can be effectively removed without abrasion.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the welding groove on the side of the tank, Figure 2
FIG. 3 is a perspective view of a disc plan used in the polishing method of the present invention, FIG. 3 is a partially enlarged view of a brush, and FIG. 4 is a sectional view showing the state in which the disc plan is used. la, 2a welding groove part of ring plate, 10 disc brush, 12 raylon fiber lamp! N 14 grinder, 15 motor, 17 circumferential surface of disc brush 3
,

Claims (1)

[Claims] A brush made of synthetic fibers with abrasive grains is formed into a disk shape, and this disk brush is connected to a motor shaft to be driven to rotate, and the circumferential surface of the disk brush is pressed against the welding groove for polishing. Features of the welding groove part＠
Method.