CN201676970U

CN201676970U - Improved straight welded pipe expander die

Info

Publication number: CN201676970U
Application number: CN201020155349XU
Authority: CN
Inventors: 王钢; 张雷; 郭振其; 陈小伟; 薛向庭; 王占理; 王旺甫; 吕成秀
Original assignee: CNPC Bohai Equipment Manufacturing Co Ltd; Julong Steel Pipe Co Ltd
Current assignee: CNPC Bohai Equipment Manufacturing Co Ltd; Julong Steel Pipe Co Ltd
Priority date: 2010-04-12
Filing date: 2010-04-12
Publication date: 2010-12-22
Anticipated expiration: 2020-04-12

Abstract

The utility model discloses an improved straight welded pipe expander die. A module the section of which is an annular sector is positioned on an expander head main body by means of a wedge block. The length direction of the module is consistent with the axes direction of an expander head. The number of the module is equal to the number of the wedge block. The outer circumference of one module is provided with a soldering seam containing groove the length of which is equal to the length of a bus. The key improvement is as follows: the soldering seam containing groove is a V-shaped groove, which is 40 to 50mm wide at bottom and 5.5 to 6.5 mm high. The utility model has the advantages that by increasing the height and bottom edge width of the V-shaped soldering seam containing groove, the extrusion of a steel pipe deflection die on the soldering seam of a welded pipe, which is caused by the concave soldering seam area and the ultrahigh soldering seam of the straight welded pipe and inaccurate positioning, is effectively prevented, the soldering seam tearing problem of the welded pipe, which is caused by the extrusion, is solved, product pass percent is improved and the economic loss of manufacturing enterprise is reduced.

Description

A kind of improved ERW hole enlargement mould

Technical field

The utility model relates to a kind of ERW production auxiliary equipment, particularly a kind of improved ERW hole enlargement mould.

Background technology

In X80 ERW production process, adopt JCOE generation method or JOE production method no matter be, it is a very important link that the welded tube of welding fabrication is carried out hole enlargement, general diameter enlarging method is that the hole enlargement head is installed on the cantilever, the centre is provided with a pull bar, pull bar one end is provided with a cone, with on the cantilever of cone correspondence position mould is set, mould is formed a diameter by the module of a plurality of fans ring section can be with the cylinder of working conditions change, mould is positioned on the cone by means of wedge, the big end of wedge cooperates with T type slideway by T type piece and is installed in cantilever end, the wedge small end is provided with dovetails and cooperates with dovetail groove on the cone, when the pulling pull bar, pull bar with respect to cantilever along axial-movement, thereby driving cone moves in the same way with pull bar, owing to adopt dovetails and dovetail groove to cooperate slip between cone and the wedge, and mould is subjected to treating the friction of hole enlargement steel pipe, so the wedge of fixedlying connected with mould is done rightabout moving along cone generatrices with respect to cone, so cause the variation of mould diameter, play the effect of hole enlargement, in addition, because the welded tube welded seam area is an area of stress concentration, so a module upper edge module busbar direction at the hole enlargement mould is provided with a weld seam holding tank isometric with module, this weld seam holding tank is the V-type groove, its bottom width 35mm, high 5mm, cause crackle though can avoid the extruding in mould butt welded seam district to a certain extent, but uncertain factor is more aborning, such as the weld seam indent, weld seam slight deflection too high or that the wearing and tearing of steel pipe positioner cause all can cause mould holding tank bottom surface, side or mould butt welded seam cause extruding, so still can cause the commissure crackle, thereby reduce manufacturing enterprise's product percent of pass, bring loss to enterprise.

The utility model content

The utility model provides a kind of improved ERW hole enlargement mould, occurs easily in the pipe expanding process that the commissure is torn and the problem that causes economic loss can effectively improve hole enlargement steel pipe's production yield rate to solve, and reduces economic loss.

For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of improved ERW hole enlargement mould, its structure middle section is positioned on the hole enlargement head main body by means of wedge for the module of fan annular, the length direction of module is consistent with a hole enlargement axis direction, the quantity of module equates with the quantity of wedge, on a module periphery weld seam holding tank that equates with bus length is set therein, its key improvements is: described weld seam holding tank is the V-type groove, its bottom width is 40mm to 50mm, and height is 5.5mm to 6.5mm

The above-mentioned module that is positioned on the wedge is formed a conical hole enlargement mould, the axis of a mould and hole enlargement dead in line.

Adopt the beneficial effect that technique scheme produced to be: by changing the height and the base width of V-type weld seam holding tank, effectively prevent because of straight welded pipe welding-seam district indent, weld seam is too high and locate the extruding of the inaccurate steel pipe deflection mould that causes to the welded tube weld seam, solved owing to extruding produces the problem that tear the welded tube commissure, improve product percent of pass, reduced the economic loss of manufacturing enterprise.

Description of drawings

Fig. 1 is the mold integral structure chart;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is that the A-A of Fig. 1 is to view;

Fig. 4 is the module front view;

Fig. 5 is the module left view;

Fig. 6 is the module vertical view;

1, wedge; 2, backing plate; 3, module; The bottom width of A, module weld seam holding tank; The height of B, module weld seam holding tank;

Further the utility model is described in detail below in conjunction with accompanying drawing.

The specific embodiment

For making above-mentioned purpose of the present utility model, feature and beneficial effect can become apparent more, below in conjunction with the drawings and specific embodiments among the utility model embodiment, the technical scheme among the utility model embodiment are clearly and completely described.

A kind of improved ERW hole enlargement mould, its structure middle section is positioned on the hole enlargement head main body by means of wedge 1 for the module 3 of fan annular, the length direction of module 3 is consistent with a hole enlargement axis direction, the quantity of module 3 equates with the quantity of wedge 1, on a module periphery weld seam holding tank that equates with bus length is set therein, its key improvements is: described weld seam holding tank is the V-type groove, and its bottom width is 40mm to 50mm, and height is 5.5mm to 6.5mm.The big end of wedge 1 cooperates the location by means of the T type slideway that is provided with on T type piece and the hole enlargement support arm open end, dovetails is set on wedge 1 small end cooperates with dovetail groove on the cone.

In the specific implementation process: locate by round key between module 3 and the wedge 1, be screwed and link together, and at binding face installation backing plate 2, when hole enlargement pull bar pulling cone when a hole enlargement axis direction moves, the dovetails of wedge 1 small end cooperates slip with the dovetail groove on the cone, contact with the steel pipe inwall and when producing frictional force to module 3, wedge 1 is also done radial motion when a hole enlargement axis direction slides, module 3 is with wedge 1 motion, thereby enlarge the diameter of the cylindrical die of forming by a plurality of modules 3, play the effect of hole enlargement.The weld seam holding tank is aimed at the steel pipe seam position in the hole enlargement process, owing to increased the size of weld seam holding tank, even so occur that weld seam is too high, phenomenon that welded seam area indent and the slight deflection of welded tube also can not cause weld seam to tear, improve the welded tube product qualified rate, reduced the economic loss of manufacturing enterprise.

Claims

1. improved ERW hole enlargement mould, its structure middle section is positioned on the hole enlargement head main body by means of wedge (1) for the module (3) of fan annular, the length direction of module is consistent with a hole enlargement axis direction, the quantity of module (3) equates with the quantity of wedge (1), on a module periphery weld seam holding tank that equates with bus length is set therein, it is characterized in that: described weld seam holding tank is the V-type groove, and its bottom width is 40mm to 50mm, and height is 5.5mm to 6.5mm.

2. a kind of improved ERW hole enlargement mould according to claim 1 is characterized in that: the described module (2) that is positioned on the wedge (1) is formed a conical hole enlargement mould, the axis of a mould and hole enlargement dead in line.