CN107052544A - Welding drags gas shield cover with tail - Google Patents

Abstract

The invention discloses a kind of welding gas shield cover is dragged with tail; breather pipe including protective cover shell and in protective cover shell; tube wall, the protective cover shell of the breather pipe are provided with steam vent, wherein, the steam vent on the ventilation tube wall is on the latter half tube wall of breather pipe；The protective cover shell is provided with the first controlling organization of distance between welding gun handgrip, control welding gun and protective cover and the second controlling organization of control protective cover height.The breather pipe of the protective cover of the present invention is only in cross-sectional horizontal with lower portion perforate; can be when inputting same gas flow; improve gas pressure intensity in pipe; gas is set to have than larger flow velocity; the gas of ejection is preferably concentrated on the protected direction of weld seam, improve protective efficacy, saving and protection gas; environmental protection and economic, adaptation era development.

Description

Tail trailing gas shield for welding

technical field

The invention relates to the field of welding technology, in particular to a tail trailing gas shield for welding.

Background technique

Titanium (titanium and titanium alloys) has good welding performance, but titanium is a kind of active metal, and the high-temperature molten pool formed by welding is very easy to produce hydrogen, oxygen, nitrogen, carbon, etc. above 300°C. The reaction makes welding defects such as cracks and pores very easy to occur at the weld, which makes the plasticity and toughness of the weld significantly lower, resulting in products that cannot meet the requirements. Therefore, the weld pool must be strictly protected. Although argon arc welding under vacuum can improve the plasticity and toughness of the weld to a certain extent, it has high requirements for welding equipment and high cost; the protective cover is a device that directly protects the welding pool at close range. The molten pool is prevented from absorbing oxygen by blowing out argon or helium, but the gas consumption of the existing protective cover is high and the gas output efficiency is low, especially when two titanium materials are welded at a certain angle (<180°). The distance between the exhaust hole of the cover and the welding seam is far away, so it is difficult to play an ideal protective effect.

Contents of the invention

Based on the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a trailing gas shield with a simple structure and better isolation of air.

The first technical solution adopted by the present invention to solve the above-mentioned technical problems is that the tail trailing gas protection cover for welding includes a protective cover shell and a vent pipe located in the protective cover shell, and the protective cover shell has a first side, a second The side surface, the third side surface and the first end surface and the second end surface respectively located at both ends of the protective cover, the first side surface and the second side surface respectively correspond to the first welding material and the second welding material on both sides of the weld seam, and the first The angle between one side and the second side ≥ the angle between the first welding material and the second welding material on both sides of the weld; the two ends of the ventilation pipe are respectively fastened to the first end surface and the second end surface The pipe wall, the first side and/or the second side of the ventilation pipe are provided with exhaust holes; the third side is provided with a welding torch grip, a first control mechanism for controlling the distance between the welding torch and the protective cover And the second control mechanism to control the height of the protective cover.

At present, there is no tail trailing gas shield designed specifically for the working condition of two welding consumables being welded at a certain angle (<180°). The first side and the second side of the shield of the present invention form a certain clip The angle is equivalent to forming a protruding head. Compared with other protective covers whose heads are rectangular planes, the head of the protective cover of the present invention can be deeply close to the welding site, and the distance between the vent hole and the weld seam is significantly reduced. Significantly improved gas protection effect. By setting the first control mechanism and the second control mechanism, the height of the protective cover and the distance between the protective cover and the welding torch can be adjusted according to welding materials of different materials, so as to further protect the welding seam in a targeted manner and improve product quality. The first welding material and the second welding material may be titanium, or other metals or alloys that easily absorb hydrogen, oxygen, nitrogen, carbon, etc. at high temperatures.

As a further improvement of the above-mentioned trailing gas shield for welding, the exhaust holes on the pipe wall of the vent pipe are provided on the lower half part of the pipe wall of the vent pipe.

As a further improvement of the above-mentioned tail dragging gas shield for welding, the exhaust pipes are at least two rows, and the axial distance between two adjacent rows of exhaust holes is 5-15mm; Spacing distribution.

As a further improvement of the tail trailing gas shield for welding, it also includes two sleeves, each sleeve includes a cylinder body and a base; the two ends of the ventilation pipe are respectively inserted into the cylinder body, and the two sleeves pass through The base is fastened to the first end surface and the second end surface respectively.

As a further improvement of the above tail trailing gas shield for welding, a ventilation net is sleeved on the outside of the ventilation pipe.

As a further improvement of the tail trailing gas shield for welding, it further includes a fixing ring and a rib, the fixing ring is sleeved on the ventilation pipe, one end of the rib is connected to the fixing ring, and the other end is connected to the ventilation net.

As a further improvement of the above-mentioned trailing gas shield for welding, the first control mechanism includes a horizontal control rod arranged on the third side, and a first connecting rod that can slide along the axial direction of the horizontal control rod; The second control mechanism includes a vertical control rod connected with the handle of the welding torch, and a second connecting rod axially slidable along the vertical control rod; the first connecting rod is connected with the second connecting rod.

As a further improvement of the above-mentioned trailing gas shield for welding, the first connecting rod is perpendicular to the horizontal control rod; the second connecting rod is parallel to the horizontal control rod.

As a further improvement of the above-mentioned trailing gas shield for welding, it also includes a first bolt assembly, the horizontal control rod is provided with a plurality of first through holes matching the first bolt assembly, and the first connecting rod A first connection hole matched with the first bolt assembly is provided on the top.

As a further improvement of the above tail trailing gas shield for welding, it also includes a second bolt assembly, the vertical control rod is provided with a plurality of second through holes matching the second bolt assembly, and the second connection The rod is provided with a second connection hole matched with the second bolt assembly.

As a further improvement of the above-mentioned trailing gas shield for welding, the cross-sectional area of the exhaust hole on the shell near the side of the welding material is smaller than the cross-sectional area of the side away from the welding material. The air holes can increase the flow speed of the protective airflow and enhance the protection effect.

The second technical solution adopted by the present invention to solve the above-mentioned technical problems is that the tail dragging gas shield for welding includes a shield shell and a vent pipe located in the shield shell, the pipe wall of the vent pipe and the shield shell are A vent hole is provided, wherein the vent hole on the pipe wall of the vent pipe is set on the lower part of the pipe wall of the vent pipe; the outer shell of the protective cover is provided with a welding torch grip, a control between the welding torch and the protective cover. A first control mechanism for the distance and a second control mechanism for controlling the height of the protective cover.

Different from the 360° full axial openings of the ventilation pipes of other protective covers, the ventilation pipes of the protective cover of the present invention only have holes below the cross-sectional level, which can increase the gas pressure in the pipe when the same gas flow rate is input, so that the gas It has a relatively large flow rate, so that the ejected gas can be better concentrated in the direction of the weld to be protected, improve the protection efficiency, save the protection gas, environmental protection and economy, and adapt to the development of the times. By setting the first control mechanism and the second control mechanism, the height of the protective cover and the distance between the protective cover and the welding torch can be adjusted according to welding materials of different materials, so as to further protect the welding seam in a targeted manner and improve product quality. The protection cover of the present invention can be used not only for welding of titanium materials, but also for welding of other metals or alloys that easily absorb hydrogen, oxygen, nitrogen, carbon, etc. at high temperatures.

As a further improvement of the above tail trailing gas protective cover for welding, the protective cover shell has a first side, a second side, a third side and first and second end faces respectively located at both ends of the protective cover. One side and the second side correspond to the first welding material and the second welding material on both sides of the weld respectively, and the included angle between the first side and the second side is ≥ the first welding material and the second welding material on both sides of the weld. The included angle between welding materials; the exhaust hole on the protective cover shell is arranged on the first side and/or the second side; the welding torch grip, the first control mechanism, and the second control mechanism are arranged on the third side Above; the two ends of the ventilation pipe are fastened to the first end face and the second end face respectively.

As a further improvement of the above-mentioned tail dragging gas shield for welding, the exhaust pipes are at least two rows, and the axial distance between two adjacent rows of exhaust holes is 5-15mm; each row of exhaust holes is equally spaced distributed.

As a further improvement of the tail trailing gas shield for welding, it also includes two sleeves, each sleeve includes a cylinder body and a base; the two ends of the ventilation pipe are respectively inserted into the cylinder body, and the two sleeves pass through The base is fastened to the first end surface and the second end surface respectively.

As a further improvement of the above tail trailing gas shield for welding, a ventilation net is sleeved on the outside of the ventilation pipe.

As a further improvement of the tail trailing gas shield for welding, it further includes a fixing ring and a rib, the fixing ring is sleeved on the ventilation pipe, one end of the rib is connected to the fixing ring, and the other end is connected to the ventilation net.

As a further improvement of the above-mentioned tail dragging gas shield for welding, the first control mechanism includes a horizontal control rod arranged on the casing, a first connecting rod that can slide along the axial direction of the horizontal control rod; the second The control mechanism includes a vertical control rod connected with the handle of the welding torch, and a second connecting rod axially slidable along the vertical control rod; the first connecting rod is connected with the second connecting rod.

As a further improvement of the above-mentioned trailing gas shield for welding, the first connecting rod is perpendicular to the horizontal control rod; the second connecting rod is parallel to the horizontal control rod.

As a further improvement of the above-mentioned trailing gas shield for welding, it also includes a first bolt assembly, the horizontal control rod is provided with a plurality of first through holes matching the first bolt assembly, and the first connecting rod A first connection hole matched with the first bolt assembly is provided on the top.

As a further improvement of the above tail trailing gas shield for welding, it also includes a second bolt assembly, the vertical control rod is provided with a plurality of second through holes matching the second bolt assembly, and the second connection The rod is provided with a second connection hole matched with the second bolt assembly.

As a further improvement of the above-mentioned trailing gas shield for welding, the cross-sectional area of the exhaust hole on the shell near the side of the welding material is smaller than the cross-sectional area of the side away from the welding material. The air holes can increase the flow speed of the protective airflow and enhance the protection effect.

Description of drawings

FIG. 1 is a structural schematic diagram of a tail trailing gas shield for welding in Embodiment 1. FIG.

Fig. 2 is a sectional view of the tail trailing gas shield for welding in the first embodiment.

FIG. 3 is a perspective view of the use state of the tail trailing gas shield for welding in Embodiment 1. FIG.

Fig. 4 is a front view of the use state of the tail trailing gas shield for welding according to the first embodiment.

FIG. 5 is a schematic structural view of the ventilation tube of Embodiment 1. FIG.

Fig. 6 is a schematic structural view of the ventilation net of Example 1-3.

Fig. 7 is a schematic diagram of the installation of the ventilation pipe of Embodiment 1-3.

Fig. 8 is a structural schematic diagram of a tail trailing gas shield for welding in Embodiment 2.

Fig. 9 is a cross-sectional view of the tail trailing gas shield for welding according to the second embodiment.

Fig. 10 is a front view of the use state of the tail trailing gas shield for welding according to the second embodiment.

Fig. 11 is a schematic structural view of the ventilation tubes of Embodiment 2 and Embodiment 3.

FIG. 12 is a schematic diagram of the structure of the exhaust hole of the fourth embodiment.

detailed description

Example 1

As shown in Fig. 1, the tail trailing gas shield for welding comprises a shield shell 2 and a vent pipe 1, the cross section of the shield shell 2 is triangular, and has a first side 21, a second side 22, and a third side 23 and the first end surface 24 and the second end surface respectively located at both ends of the protective cover, the first side 21 and the second side 22 correspond to the first welding material 101 and the second welding material 102 on both sides of the weld 100 respectively, so The angle between the first side 21 and the second side 22>the angle between the first welding material 101 and the second welding material 102; the first welding material 101 and the second welding material 102 are both titanium alloys And the angle between them is 70°.

It also includes two sleeves, each sleeve includes a cylinder body 71 and a base 72, the two ends of the ventilation pipe 1 are respectively inserted into the cylinder body 71, and the two sleeves are respectively connected to the cylinder body 71 through the base 72 and the matched bolt assembly 73 The first end surface 24 is fastened to the second end surface. It also includes a fixed ring 81, a rib 82, and a ventilation net 6 sleeved on the outside of the ventilation pipe 1. The fixed ring 81 is sleeved on the ventilation pipe 1. One end of the rib 82 is connected to the fixed ring 81, and the other end is connected to the ventilation net. 6 connections. The pipe wall of the ventilation pipe 1, the first side 21 and the second side 22 are all provided with multiple rows of exhaust holes 200, and the axial distance between two adjacent rows of exhaust holes 200 is 10mm; each row of exhaust holes 200 are equally spaced.

The third side 23 is provided with a welding torch handle 5 , a first control mechanism for controlling the distance between the welding torch 51 and the protective cover, and a second control mechanism for controlling the height of the protective cover. The first control mechanism includes a horizontal control rod 31 arranged on the third side 23, a first connecting rod 41 that can slide along the axial direction of the horizontal control rod 31, and a first bolt assembly 91. The horizontal control rod 31 is provided with There are a plurality of first through holes 310 matching the first bolt assembly 91, and the first connecting rod 41 is provided with a first connecting hole matching the first bolt assembly 91. distance, remove the first bolt assembly 91 and move the first connecting hole to the corresponding first through hole 310, and then make the first bolt assembly 91 pass through the first connecting hole and the first through hole 310 so that the second A connecting rod 41 is fixed at the required position to achieve the purpose of adjustment; the second control mechanism includes a vertical control rod 32 connected to the welding torch grip 5, a second connecting rod that can slide axially along the vertical control rod 32 42. The second bolt assembly 92; the vertical control rod 32 is provided with a plurality of second through holes 320 matching the second bolt assembly 92, and the second connecting rod 42 is provided with a second through hole 320 matching the second bolt assembly 92. Matching second connection hole. When it is necessary to adjust the height of the protective cover, take off the second bolt assembly 92 and move the second connecting hole to the corresponding second through hole 320, then make the second bolt assembly 92 pass through the second connecting hole and the second through hole. The hole 320 allows the vertical control rod 32 to be fixed at a desired position, that is, to achieve the purpose of adjustment. The first connecting rod is connected with the second connecting rod. The first connecting rod is perpendicular to the horizontal control rod; the second connecting rod is parallel to the horizontal control rod.

When in use, the protective cover of the present invention is connected with the welding torch, so that the protective cover moves with the movement of the welding torch, and the welding torch acts on the weld seam to form a molten pool and continues to move forward, while the protective cover follows closely and moves to the molten pool. , the argon gas discharged from the exhaust hole of the ventilation pipe is discharged from the exhaust holes on the first side and the second side and blows away the oxygen near the molten pool, thereby preventing the molten pool from absorbing oxygen and improving the weld plasticity and toughness of the product .

Example 2

Compared with Embodiment 1, the welding trailing gas shield of this embodiment has the following differences: the exhaust hole 200 on the pipe wall of the ventilation pipe 1 is arranged on the lower half of the pipe wall of the ventilation pipe 1, and the The vent hole 200 on the protective cover shell 2 is located at the bottom of the shell 2; the cross section of the protective cover is rectangular, and the included angle between the first welding material 101 and the second welding material 102 is 180°. The welding torch handle 5 , the first control mechanism for controlling the distance between the welding torch 51 and the protective cover, and the second control mechanism for controlling the height of the protective cover are arranged on the top of the protective cover shell 2 .

Example 3

Compared with Embodiment 1, the tail trailing gas shield for welding in this embodiment further has the following features: the exhaust hole 200 on the pipe wall of the vent pipe 1 is provided on the lower half part of the pipe wall of the vent pipe 1 .

Example 4

Compared with Embodiments 1-3, the welding trailing gas shield of this embodiment further has the following features: as shown in Figure 12, the lateral side of the exhaust hole 200 on the casing 2 near the welding material side The cross-sectional area is smaller than the cross-sectional area of the side away from the welding material; the welding material is the first welding material 101 or the second welding material 102 .

Claims (10)

1. Tail dragging gas protection cover for welding, comprising a protective cover shell (2) and a vent pipe (1) located in the protective cover shell (2), characterized in that: The pipe wall of the ventilation pipe (1) and the protective cover shell (2) are provided with an exhaust hole (200), wherein the ventilation hole (200) on the pipe wall of the ventilation pipe (1) is arranged on the ventilation pipe (1) on the lower half of the pipe wall; The protective cover shell (2) is provided with a welding torch grip (5), a first control mechanism for controlling the distance between the welding torch (51) and the protective cover, and a second control mechanism for controlling the height of the protective cover. 2. The tail trailing gas shield for welding according to claim 1, characterized in that: the shield shell (2) has a first side (21), a second side (22), and a third side (23) and the first end face (24) and the second end face respectively located at both ends of the protective cover, the first side (21) and the second side (22) are respectively connected with the first welding material (101) and the first welding material (101) on both sides of the weld (100) and Corresponding to the second welding material (102), the angle between the first side (21) and the second side (22) ≥ the first welding material (101) and the second welding material (102) on both sides of the weld The included angle between; the exhaust hole (200) on the protective cover shell (2) is located on the first side (21) and/or the second side (22); the welding torch grip (5), The first control mechanism and the second control mechanism are arranged on the third side surface (23); the two ends of the ventilation pipe (1) are fastened to the first end surface (24) and the second end surface respectively. 3. The tail dragging gas shield for welding according to claim 1 or 2, characterized in that: the exhaust holes (200) are at least two rows, and the axial distance between two adjacent rows of exhaust holes (200) 5-15mm; each row of exhaust holes (200) is equally spaced. 4. The tail trailing gas shield for welding as claimed in claim 2, characterized in that: it also includes two sleeves, each sleeve includes a cylindrical body (71) and a base (72); said ventilation pipe (1 ) are respectively inserted into the barrel (71), and the two sleeves are respectively fastened to the first end face (24) and the second end face through the base (72). 5. The tail trailing gas shield for welding according to claim 1, characterized in that: a ventilation net (6) is sheathed outside the ventilation pipe (1). 6. The tail trailing gas shield for welding according to claim 5, further comprising a fixing ring (81) and a rib (82), and the fixing ring (81) is sleeved on the ventilation pipe (1) , one end of the rib (82) is connected to the fixed ring (81), and the other end is connected to the ventilation net (6). 7. The tail trailing gas shield for welding according to claim 1, characterized in that: the first control mechanism comprises a horizontal control rod (31) arranged on the casing (2), which can be moved along the horizontal control rod (31) ) of the first connecting rod (41) that slides axially; the second control mechanism includes a vertical control rod (32) connected with the welding torch grip (5), which can slide axially along the vertical control rod (32) The second connecting rod (42); the first connecting rod (41) is connected with the second connecting rod (42). 8. The tail dragging gas shield for welding according to claim 7, characterized in that: the first connecting rod (41) is vertical to the horizontal control rod (31); the second connecting rod (42) is vertical to the horizontal control rod (31); Control rod (31) is parallel. 9. The welding trailing gas shield as claimed in claim 8, characterized in that: it also comprises a first bolt assembly (91), said horizontal control rod (31) is provided with a plurality of bolt assemblies ( 91) A matching first through hole (310), the first connecting rod (41) is provided with a first connecting hole matching the first bolt assembly (91). 10. The tail trailing gas shield for welding according to claim 8, characterized in that: it also includes a second bolt assembly (92), and the vertical control rod (32) is provided with a plurality of bolt assemblies connected to the second bolt assembly. (92) a matched second through hole (320), the second connecting rod (42) is provided with a second connecting hole matched with the second bolt assembly (92).