Positioning tooling and positioning method for butt welding of two semi-cylindrical shells

Abstract

The present invention discloses a butt welding positioning tool and positioning method for two semi-cylindrical shells, which solves the problem of how to accurately butt and position the two semi-cylindrical shells to facilitate the smooth welding of the inner weld. A left roller pair bracket (2) and a right roller pair bracket (4) are respectively arranged on the bottom plate (1) of the positioning tool, the central axis of the left roller pair (3) and the central axis of the right roller pair (5) are on the same straight line, the left semi-cylindrical shell (6) is top-connected to the left roller pair (3), and the right semi-cylindrical shell (7) is top-connected to the right roller pair (5), a butt welding inner weld seam (8) is arranged between the left semi-cylindrical shell (6) and the right semi-cylindrical shell (7), a left fixed vertical plate bracket (9) is arranged on the left side of the left semi-cylindrical shell (6), and a right movable vertical plate bracket (10) is arranged on the right side of the right semi-cylindrical shell (7). Accurate butt welding and positioning of the two semi-cylindrical shells is achieved.

Description

Technical Field

[0001] The invention relates to a positioning tool for butt welding two semi-cylindrical shells into a longer semi-cylindrical shell, and in particular to a positioning tool for butt welding two semi-cylindrical shells and a positioning method. Background Art

[0002] The lower half of the base of some large DC propulsion motors is composed of two semi-cylindrical shells butt-welded into a longer semi-cylindrical shell; due to the thickness and length of the semi-cylindrical shell, it is limited by the bending length of the bending machine and cannot be bent into a semicircular arc from a single steel plate. Instead, it is made of two shorter steel plates that are bent into semicircular arcs respectively and then connected and butt-welded; the middle butt weld is a semi-circular weld with a U-shaped groove and a thickness of 40 mm. During assembly and welding, how to accurately butt and position the two semi-cylindrical shells has become a technical problem that urgently needs to be solved on site. Summary of the invention

[0003] The invention provides a butt welding positioning tool and a positioning method for two semi-cylindrical shells, which solves the technical problem of how to accurately butt and position the two semi-cylindrical shells to facilitate smooth welding of the inner weld.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A positioning tool for butt-welding two semi-cylindrical shells comprises a positioning tool base plate, a left semi-cylindrical shell and a right semi-cylindrical shell, wherein a left roller pair bracket and a right roller pair bracket are respectively arranged on the positioning tool base plate, a left roller pair is arranged on the left roller pair bracket, and a right roller pair is arranged on the right roller pair bracket, wherein the central axis of the left roller pair and the central axis of the right roller pair are on the same straight line, the left semi-cylindrical shell is top-connected to the left roller pair, and the right semi-cylindrical shell is top-connected to the right roller pair, an inner butt-welding seam is arranged between the left semi-cylindrical shell and the right semi-cylindrical shell, a left fixed vertical plate bracket is arranged on the left side of the left semi-cylindrical shell, a right movable vertical plate bracket is arranged on the right side of the right semi-cylindrical shell, a left top limit plate is arranged on the top of the left fixed vertical plate bracket, and a right top limit plate is arranged on the top of the right movable vertical plate bracket.

[0006] A pair of lower tension bolts and a pair of upper tension bolts are respectively arranged between the left fixed vertical plate bracket and the right movable vertical plate bracket.

[0007] A method for butt welding and positioning two semi-cylindrical shells, comprising the following steps:

[0008] The first step is to respectively arrange a left roller pair bracket and a right roller pair bracket on the bottom plate of the positioning tooling, arrange a left roller pair on the left roller pair bracket, and arrange a right roller pair on the right roller pair bracket, the central axis of the left roller pair and the central axis of the right roller pair are on the same straight line, the left semi-cylindrical shell is top-connected to the left roller pair, and the right semi-cylindrical shell is top-connected to the right roller pair, the left end face of the left semi-cylindrical shell is top-connected to the left fixed vertical plate bracket, and the left top limit plate arranged on the top of the left fixed vertical plate bracket is made to abut against the top face of the left semi-cylindrical shell by rotating the left roller pair;

[0009] Step 2: Move the right movable vertical plate bracket to the left so that the right movable vertical plate bracket is close to the right end surface of the right semi-cylindrical shell, and rotate the right roller pair so that the right top limit plate set on the top of the right movable vertical plate bracket is close to the top surface of the right semi-cylindrical shell;

[0010] The third step is to install a pair of lower tension bolts between the left fixed vertical plate bracket and the right movable vertical plate bracket, and the pair of lower tension bolts are installed on the outside of the left semi-cylindrical shell and the right semi-cylindrical shell; install a pair of upper tension bolts between the left fixed vertical plate bracket and the right movable vertical plate bracket, and the pair of upper tension bolts are installed on the outside of the left semi-cylindrical shell and the right semi-cylindrical shell;

[0011] Step 4: After tightening a pair of lower tension bolts and a pair of upper tension bolts, weld the inner butt weld seam between the left semi-cylindrical shell and the right semi-cylindrical shell.

[0012] The present invention ensures the consistency of the width of the inner welding seam of the butt weld by pulling and abutting the two vertical surfaces of the two vertical plate brackets, and ensures the coincidence of the central axes of the two semi-cylindrical shells by supporting the two pairs of rollers with coincident center lines. The butt joint semicircles of the two semi-cylindrical shells are completely overlapped by limiting the two top end limiting plates, thereby achieving accurate butt joint positioning of the two semi-cylindrical shells. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention in the main viewing direction;

[0014] Figure 2 It is a schematic diagram of the structure of the present invention in a top view;

[0015] Figure 3 It is a schematic diagram of the structure of the present invention in the left viewing direction. DETAILED DESCRIPTION

[0016] The present invention is described in detail below in conjunction with the accompanying drawings:

[0017] A positioning tool for butt welding of two semi-cylindrical shells, comprising a positioning tool base plate 1, a left semi-cylindrical shell 6 and a right semi-cylindrical shell 7, a left roller pair bracket 2 and a right roller pair bracket 4 are respectively arranged on the positioning tool base plate 1, a left roller pair 3 is arranged on the left roller pair bracket 2, and a right roller pair 5 is arranged on the right roller pair bracket 4, the central axis of the left roller pair 3 and the central axis of the right roller pair 5 are on the same straight line, the left semi-cylindrical shell 6 is top-connected to the left roller pair 3, and the right semi-cylindrical shell 7 is top-connected to the right roller pair 5, An inner butt welding seam 8 is provided between the left semi-cylindrical shell 6 and the right semi-cylindrical shell 7, a left fixed vertical plate bracket 9 is provided on the left side of the left semi-cylindrical shell 6, a right movable vertical plate bracket 10 is provided on the right side of the right semi-cylindrical shell 7, a left top limit plate 13 is provided on the top of the left fixed vertical plate bracket 9, and a right top limit plate 14 is provided on the top of the right movable vertical plate bracket 10; studs 17 are provided at the outer ends of the two top limit plates, and the studs 17 are screwed together with nuts 16 after passing through the long strip holes provided at the top of the vertical plates of the vertical plate bracket.

[0018] A pair of lower tension bolts 11 and a pair of upper tension bolts 12 are respectively arranged between the left fixed vertical plate bracket 9 and the right movable vertical plate bracket 10; the pair of lower tension bolts 11 are arranged in the long holes of the bracket vertical plates to facilitate the adjustment of the tension position.

[0019] A method for butt welding and positioning two semi-cylindrical shells, comprising the following steps:

[0020] The first step is to respectively set a left roller pair bracket 2 and a right roller pair bracket 4 on the positioning tool bottom plate 1, set a left roller pair 3 on the left roller pair bracket 2, and set a right roller pair 5 on the right roller pair bracket 4. The central axis of the left roller pair 3 and the central axis of the right roller pair 5 are on the same straight line. The left semi-cylindrical shell 6 is top-connected to the left roller pair 3, and the right semi-cylindrical shell 7 is top-connected to the right roller pair 5. The left end surface of the left semi-cylindrical shell 6 is top-connected to the left fixed vertical plate bracket 9. By rotating the left roller pair 3, the left top limit plate 13 set on the top of the left fixed vertical plate bracket 9 is brought into contact with the top surface of the left semi-cylindrical shell 6.

[0021] Step 2: Move the right movable vertical plate bracket 10 to the left so that the right movable vertical plate bracket 10 is in contact with the right end surface of the right semi-cylindrical shell 7, and rotate the right roller pair 5 so that the right top limit plate 14 provided on the top of the right movable vertical plate bracket 10 is in contact with the top surface of the right semi-cylindrical shell 7;

[0022] The third step is to install a pair of lower tension bolts 11 between the left fixed vertical plate bracket 9 and the right movable vertical plate bracket 10, and the pair of lower tension bolts 11 are installed on the outside of the left semi-cylindrical shell 6 and the right semi-cylindrical shell 7; install a pair of upper tension bolts 12 between the left fixed vertical plate bracket 9 and the right movable vertical plate bracket 10, and the pair of upper tension bolts 12 are installed on the outside of the left semi-cylindrical shell 6 and the right semi-cylindrical shell 7;

[0023] Step 4: After tightening a pair of lower tension bolts 11 and a pair of upper tension bolts 12, the butt-welded inner weld seam 8 between the left semi-cylindrical shell 6 and the right semi-cylindrical shell 7 is welded.

Claims

1. A method for butt welding positioning of two semi-cylindrical shells, which is performed by butt welding positioning tools for two semi-cylindrical shells, wherein the butt welding positioning tools for two semi-cylindrical shells comprise a positioning tool base plate (1), a left semi-cylindrical shell (6) and a right semi-cylindrical shell (7), a left roller pair bracket (2) and a right roller pair bracket (4) are respectively arranged on the positioning tool base plate (1), a left roller pair (3) is arranged on the left roller pair bracket (2), and a right roller pair (5) is arranged on the right roller pair bracket (4), the central axis of the left roller pair (3) and the central axis of the right roller pair (5) are on the same straight line, and the left semi-cylindrical shell (6) is connected to the left roller pair (3). A right semi-cylindrical shell (7) is connected to the top of the right roller pair (5); a butt-welded inner weld seam (8) is provided between the left semi-cylindrical shell (6) and the right semi-cylindrical shell (7); a left fixed vertical plate bracket (9) is provided on the left side of the left semi-cylindrical shell (6); a right movable vertical plate bracket (10) is provided on the right side of the right semi-cylindrical shell (7); a left top limit plate (13) is provided on the top of the left fixed vertical plate bracket (9); and a right top limit plate (14) is provided on the top of the right movable vertical plate bracket (10); a pair of lower tension bolts (11) and a pair of upper tension bolts (12) are provided between the left fixed vertical plate bracket (9) and the right movable vertical plate bracket (10), respectively; characterized in that Follow these steps: The first step is to respectively arrange a left roller pair bracket (2) and a right roller pair bracket (4) on the positioning tool base plate (1), arrange a left roller pair (3) on the left roller pair bracket (2), and arrange a right roller pair (5) on the right roller pair bracket (4), wherein the central axis of the left roller pair (3) and the central axis of the right roller pair (5) are on the same straight line, a left semi-cylindrical shell (6) is abutted on the left roller pair (3), and a right semi-cylindrical shell (7) is abutted on the right roller pair (5), and the left end surface of the left semi-cylindrical shell (6) is abutted against the left fixed vertical plate bracket (9), and the left top limit plate (13) arranged on the top of the left fixed vertical plate bracket (9) is abutted against the top surface of the left semi-cylindrical shell (6) by rotating the left roller pair (3); Step 2: Move the right movable vertical plate bracket (10) to the left so that the right movable vertical plate bracket (10) is in contact with the right end surface of the right semi-cylindrical shell (7), and rotate the right roller pair (5) so that the right top limit plate (14) provided on the top of the right movable vertical plate bracket (10) is in contact with the right end surface of the right semi-cylindrical shell (7). The top end surfaces of the right semi-cylindrical shell (7) are butted together; Step 3: Install a pair of lower tension bolts (11) between the left fixed vertical plate bracket (9) and the right movable vertical plate bracket (10), wherein the pair of lower tension bolts (11) are installed on the outer sides of the left semi-cylindrical shell (6) and the right semi-cylindrical shell (7); install a pair of upper tension bolts (12) between the left fixed vertical plate bracket (9) and the right movable vertical plate bracket (10), wherein the pair of upper tension bolts (12) are installed on the outer sides of the left semi-cylindrical shell (6) and the right semi-cylindrical shell (7); Step 4: After tightening the pair of lower tension bolts (11) and the pair of upper tension bolts (12), the butt-welded inner weld seam (8) between the left semi-cylindrical shell (6) and the right semi-cylindrical shell (7) is welded.

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