JP3008326B2 - How to make a pump stand - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a pump base.

[0002]

2. Description of the Related Art As shown in FIGS. 7 and 8, metal flat flanges 2 are provided at upper and lower ends of a cylindrical body 1 made of a metal plate.
3 together are integrally bonded by welding, the opening 4 continuous to the cylindrical barrel 1 and a plane flange 3 the lower is formed
In general, a pump base is formed by forming a body side opening 4A in the cylindrical body 1 by gas cutting, forming a flange side opening 4B in the lower flat flange 3 by gas cutting, and then opening the body side opening. The lower plane flange 3 is integrally joined to the lower end of the cylindrical body 1 by welding with the flange side opening 4B corresponding to the flange 4A, and the upper plane flange 2 is welded to the upper end of the cylindrical body 1. To join together. Next, the joint surfaces 2A, 2A,
It is manufactured by a procedure of cutting and finishing 3A by machining.

[0003] In the conventional fabrication method, and it is the cylindrical barrel plane flange 2 of the upper and upper 1 can be performed because not formed apertures, by continuous cutting machining of the joint surface 2A, Due to the high strength of the upper part of the pump gantry, vibration (hereinafter simply referred to as vibration) called chatter does not occur during machining of the joint surface 2A. Therefore, for the upper planar flange 2,
High machining accuracy can be ensured by cutting without any problem. However, since the openings 4A and 4B are formed in the lower and lower flat flanges 3 of the cylindrical body 1, machining of the joint surface 3A by continuous cutting becomes impossible, and the cutting form becomes intermittent cutting. In addition, since the lower strength of the pump gantry has an opening and is weaker than the upper strength, vibration occurs at the time of machining to reduce machining accuracy.

As means for solving such a reduction in processing accuracy, and coupled together by welding a flat flange 3 below the lower end of the cylindrical barrel 1 at a stage which is not yet opened 4A is formed, the junction A method of cutting and finishing the surface 3A by machining is conceivable. According to this method, since the joining surface 3A can be machined by continuous cutting, vibration can be suppressed and high machining accuracy can be secured. However, after the joining surface 3A is cut and finished, it is necessary to form the opening 4A in the lower flat flange 3 by gas cutting, and at this time, the gantry is distorted due to thermal distortion, and complicated distortion occurs after the formation of the opening 4A. There is a problem that requires taking work.

[0005]

The problem to be solved is that, in the former manufacturing method, the cutting form of the joint surface of the lower flat flange is intermittent cutting, and vibration occurs during machining to reduce machining accuracy. In the latter manufacturing method, the joining surface can be processed with high accuracy, but on the other hand, a thermal distortion occurs and the gantry is distorted, so that a complicated strain removing operation is required after the opening is formed.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a metal flat flange is integrally connected to each of the upper and lower ends of a metal cylindrical body by welding, and at least one of the metal cylindrical flanges is connected to the cylindrical body. a fabrication method of the pump opening continuous in the plane flange is <br/> formed frame, said body portion
Of the openings that are continuous with the flat flange, the opening on the flange side is removed or removed when forming this opening.
Joint surface of the flange using a temporary fixing member consisting of a metal piece
And the outer surface of the temporary fixing member is closed so that the outer surface of the temporary fixing member is flush with the joining surface of the flange and the outer surface of the temporary fixing member with the opening closed, and then the temporary fixing member is removed. Thus, the opening on the flange side is opened, so that the joining surface can be machined with high accuracy, and the object of preventing the gantry from being distorted has been achieved.

[0007]

According to the present invention, the body and the flat flange are connected continuously.
That the opening of the flange side of the opening, during the formation of the opening
Since the bonding surface of the flange and the outer surface of the temporary fixing member that are flush with each other in a closed state using a temporary fixing member made of a metal piece that has been removed or removed , machining is performed on the bonding surface. The form becomes continuous cutting. Therefore,
Vibration during machining that maintain high machining accuracy is suppressed. Also, since the opening can be opened by removing the temporary fixing member by pressing pressure or filing work or local gas cutting, after the flange is integrally joined to the body,
The gantry is not distorted due to thermal distortion unlike the case where the opening is formed by gas cutting .

[0008]

Embodiments of the present invention will be described below with reference to the drawings. The same or equivalent parts as those of the conventional example include
The description is given with the same reference numerals. 1 and 2,
In manufacturing the pump base, an opening 4A on the body side is formed in the cylindrical body 1 made of a metal plate by gas cutting, and an opening 4B on the flange side is formed in the lower flat flange 3 made of the metal plate by gas cutting. . The metal pieces removed by gas cutting when forming the openings 4B are stored for use as temporary fixing members described later. Next, in a state where the opening 4B on the flange side corresponds to the opening 4A on the body side, the cylindrical body 1
The lower plane flange 3 is integrally joined to the lower end of the cylindrical body 1 by welding, and the upper plane flange 2 is integrally joined to the upper end of the cylindrical body 1 by welding.

Then, as shown in FIGS. 3 and 4, the above-mentioned storage metal piece is fitted as a temporary fixing member 5 into an opening 4B on the flange side formed in the lower flat flange 3, and the lower flat flange 3 is joined. 3A and the lower surface of the temporary fixing member 5 (outside
Surface) While maintaining the same state as 5A, the straddling plate 6, 6 ... straddling the upper surfaces of both the temporary fixing member 5 and the lower flat flange 3.
Are temporarily fixed to the lower flat flange 3 and the temporary fixing member 5 by spot welding, for example. Thereafter, the joining surfaces 2A and 3A of the two flat flanges 2 and 3 are cut and finished by machining, and then the pressing plates 6 and 6... Are removed by pressing or filing to form openings 4B on the flange side. The gantry shown in FIGS. 7 and 8 is manufactured by the procedure of opening.

[0010] the open in this manner, the flange side of the opening 4B
From the metal pieces removed and stored when forming the opening 4B.
That it was closed by Karitome member 5, since mechanical processing on the lower surface 5A of the joint surface 3A and Karitome member 5 under the plane flange 3 while closing the opening 4B, the cutting form of the joint surface 3A is continuous cutting Become. Therefore, vibration during machining is suppressed, so that the joint surface 3A can be machined with high accuracy. Further, the temporary fixing member 5 is removed, and the opening 4B on the flange side is removed.
Can be released by pressing the temporary fixing member 5 or filing the spot welded portion, so that the gantry is not distorted due to thermal distortion.

In the above embodiment, the lower flat flange 3 made of a metal plate is cut into the opening 4 on the flange side by gas cutting.
In the case where the metal piece removed from the flat flange 3 is formed as the temporary fixing member 5 in the case where the B is formed, the lower flat flange 3 is not cut as shown in FIGS. By providing the cuts 8, 8 leaving the parts 7, 7, between the cuts 8, 8, the shape of the opening 4B is formed.
The metal piece to be removed at the time of formation has the function of the temporary fixing member 5, and the plates 6, 6,... Are temporarily fixed to the lower flat flange 3 and the temporary fixing member 5 by spot welding, and then the joining surface 3A is formed. And machine processing is performed on the lower surface 5A of the temporary fixing member 5,
Then, by pressing or filing work, this plate 6,6 ...
Are removed, and the uncut portions 7, 7 are gas-cut to remove the temporary fixing member 5 (metal piece) , thereby opening the opening 4B. Can be manufactured with high precision, and a gantry can be manufactured while preventing distortion due to thermal distortion.

[0012]

As described above, according to the present invention, the body
Of the openings that are continuous with the flat flange, the opening on the flange side is removed or removed when forming this opening.
The Karitome member made of a metal piece in a state of closing with that,
Because mechanical processing on the outer surface <br/> the flange joint surface and the temporary fixing member in flush cutting form of the bonding surface becomes continuous cutting. Therefore, vibration during machining is suppressed, so that the joining surface of the flange can be machined with high accuracy.
Also, since the opening can be opened by removing the temporary fixing member by pressing force or filing work or local gas cutting, after the flange is integrally joined to the body,
As in the case where the opening is formed by gas cutting , the gantry is not distorted due to thermal distortion.

[Brief description of the drawings]

FIG. 1 is a front view showing a state during manufacture according to an embodiment of the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is an enlarged partial front view showing a state where an opening on a flange side is closed by a temporary fixing member.

FIG. 4 is a bottom view of FIG. 3;

FIG. 5 is an enlarged partial front view showing a deforming unit in a state where an opening on a flange side is closed by a temporary fixing unit.

FIG. 6 is a bottom view of FIG. 5;

FIG. 7 is a front view showing an example of a pump base.

FIG. 8 is a left side view of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical trunk part 2 Plane flange 3 Plane flange 3A Joining surface 4 Opening 4B Flange side opening 5 Temporary fixing member

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-75837 (JP, A) JP-A-55-12250 (JP, A) Jpn. Field (Int.Cl. ⁷ , DB name) F04B 53/00 F16M 7/00

Claims (1)

(57) [Claims] A metal flat flange is integrally joined to each of upper and lower ends of a metal cylindrical body by welding, and an opening continuous with the cylindrical body and at least one of the flat flanges. lay but a formed pump frame fabrication method, the opening of the flange side of the opening to be continuous with the body portion and the flat flange, have also been removed in forming the opening
Is a flange using a temporary fixing member consisting of a metal piece to be removed.
The joining surface of the fixing member and the outer surface of the temporary fixing member were closed so as to be flush with each other, and the joining surface of the flange and the outer surface of the temporary fixing member were machined with the opening closed. Thereafter, the temporary fixing member is removed to open the opening on the flange side .