Gas shield for welding of titanium alloys

Abstract

This invention discloses a gas shield for titanium alloy welding, comprising: a shield body; a pair of shield bodies disposed opposite each other on the front and back sides of the weld; the pair of shield bodies adhering to one side of the workpiece and forming a local gas protection zone relative to the weld; the welding port at one end of each shield body corresponding to the weld position of the workpiece; a gasket disposed on one shield body and the other shield body separately forming a local gas protection zone; a welding torch adjustment structure disposed on each shield body; the welding torch adjustment structure being disposed corresponding to the welding port position; the welding torch adjustment structure being used to adjust the height of the welding torch and the welding angle. This invention provides a gas shield for titanium alloy welding, which provides local gas protection for the welding position of the workpiece, and allows for adjustment of the height of the welding torch and the welding angle via the welding torch adjustment structure, facilitating accurate welding and improving welding quality.

Description

Technical Field

[0001] This invention relates to the field of gas shields for titanium alloy welding. Background Technology

[0002] When performing overall welding on a workpiece, if a whole gas shield is used, the entire workpiece is within the gas shield space, making it difficult to adjust its position. Therefore, local gas shielding is used. The clamps of a typical gas shield are fixed, and the welding torch is mounted on the clamps, making it difficult to adjust the welding torch. During the welding process, the position of the welding torch needs to be accurately adjusted, including height and angle adjustments, but the fixed clamps make it difficult to adjust the welding torch effectively. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a gas shield for welding titanium alloys. The gas shield provides local gas protection for the welding position of the workpiece, and the height and angle of the welding torch can be adjusted by the welding torch adjustment structure, which is conducive to accurate welding and improves the welding quality.

[0004] Technical solution: To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A gas shield for welding titanium alloys includes a shield body; a pair of shield bodies are disposed opposite each other on the front and back sides of the weld; the pair of shield bodies are attached to one side of the workpiece and between the workpiece, forming a local gas protection zone relative to the weld; the welding port at one end of the shield body corresponds to the weld position of the workpiece; a gasket provided on one shield body can independently form a local gas protection zone between the other shield body; a welding torch adjustment structure is provided on the shield body; the welding torch adjustment structure is provided corresponding to the welding port position; the welding torch adjustment structure is used to adjust the welding torch height and welding angle.

[0006] Furthermore, the protective cover includes arc-shaped side plates; a cover plate, a strip groove, a pipe, and a filter screen are respectively provided between a pair of arc-shaped side plates; the cover plate, strip groove, pipe, and filter screen are slidably disposed in corresponding grooves on the sidewalls of the arc-shaped side plates; a filter screen is disposed between the bottoms of a pair of arc-shaped side plates; a strip groove is provided on the filter screen; a pipe is disposed between the filter and the strip groove; the cover plate covers the strip groove; an installation hole is opened on the surface of the cover plate; the installation hole is disposed away from the weld joint; a gas pylon is disposed on the installation hole; one end of the gas pylon is embedded in the installation hole, passes through the strip groove, and communicates with the pipe.

[0007] Furthermore, a slide is provided below the groove corresponding to the side wall of the arc-shaped side plate; a gasket is provided between a pair of arc-shaped side plates; the edge of the gasket is opened in the slide groove; the middle part of the gasket is an elastic structure; the middle part of the gasket protrudes towards the surface of the weldment; the gasket is attached to the surface of the weldment.

[0008] Furthermore, the bottom of the arc-shaped side plate has a slanted opening; an opening is formed on the slanted opening; the opening of the latch gradually decreases in size; the latch extends along the length direction of the arc-shaped side plate; the local gas protection zone formed by the relative openings of the latch is inclined outward; an adhesive strip is provided inside the latch; one side of the adhesive strip protrudes outward; the surface of the adhesive strip is attached to the surface of the weldment, and works with the arc-shaped side plate to achieve local sealing.

[0009] Furthermore, the welding torch adjustment structure includes a clamp and a connecting block; a fixing block is fixedly provided on the surface of the cover plate; an embedding groove is provided on one side of the fixing block; the opening of the embedding groove faces the welding port; the connecting block includes an extension and a mating block; the bottom of the mating block is fixed to one end of the extension piece; the other end of the extension piece is correspondingly inserted into the embedding groove; the clamp is fixed to the mating block by bolts; the clamp is positioned corresponding to the welding port; and the welding torch is correspondingly mounted on the clamp.

[0010] Furthermore, the card includes a ring tube; a connection port is provided on one side of the ring tube; a protrusion is fixed at the opening of the connection port; a through hole is provided through the protrusion; multiple protrusions on one side of the connection port opening are spaced vertically; a slot is formed between the protrusions on both sides of the connection port opening; a through hole is provided through the mating block; multiple through holes are spaced vertically; when the slot is engaged with the mating block, the through hole is connected to one of the through holes; a bolt passes through the through hole and the through hole.

[0011] Furthermore, the protrusion can be movably connected to the mating block by bolts; the bottom of the protrusion is provided with an abutting structure; the abutting structure is located close to the welding joint; the tilt angle between the adjustment card and the mating block is adjusted, and the abutting end of the abutting structure abuts against the surface of the cover plate to stabilize the card.

[0012] Furthermore, the convex bottom is provided with a movable hole; the abutting structure includes an elastic element; the elastic element is disposed in the movable hole, and one end of the elastic element protrudes from the movable hole, which is a protruding end; an elastic pad is fixed on the protruding end; the elastic pad block abuts against the surface of the cover plate.

[0013] Furthermore, the protrusion has a notch on its sidewall; the notch is positioned opposite to the insertion port; the notch communicates with the movable hole; multiple communicating receiving ports are provided on one side of the notch opening; the multiple receiving ports are spaced vertically; a rotating block is fitted onto the movable end of the elastic element; the rotating block and the elastic element are detachably configured; the rotating block is movably positioned within the movable hole; a connecting rod is fixed to the sidewall of the rotating block; the end of the connecting rod away from the rotating block extends out of the notch; the rotating block can be rotated by the connecting rod, and the connecting rod is moved into the receiving port to position the rotation.

[0014] Beneficial effects: In this invention, a local gas protection can be formed between a pair of protective covers, which facilitates welding on both sides; a local gas protection can also be formed between the gaskets on one protective cover and the other protective cover. When welding on the front side, the gasket on the back protective cover is placed on the back side of the weld, thereby forming a local gas protection; the gas filling time is reduced, and the use of gaskets instead of tape can prevent tape from sticking to the back side of the weld.

[0015] The protrusion and the mating block are rotatable. Rotating the protrusion drives the ring tube and the welding torch to rotate, adjusting the welding angle of the welding torch. When adjusted to the correct position, the protrusion and the mating block can be stabilized by bolts, and the contact structure can be pressed against the cover plate. The bolts further enhance the stabilizing effect and prevent the ring tube and the welding torch from rotating. The stability of the protrusion support can be adjusted by adjusting the length of the protruding end of the elastic element, preventing the clamp and the welding torch from rotating. Attached Figure Description

[0016] Appendix Figure 1 For the protective cover structure diagram;

[0017] Appendix Figure 2 Diagram of the welding torch adjustment mechanism;

[0018] Appendix Figure 3 This is a diagram of the connecting block structure;

[0019] Appendix Figure 4 Here is a diagram of the clamp structure;

[0020] Appendix Figure 5 This is a diagram of conflicting structures. Detailed Implementation

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] As attached Figure 1-5A gas shield for welding titanium alloy includes a shield body 1; a pair of shield bodies 1 are disposed opposite each other on the front and back sides of the weld; the pair of shield bodies 1 are attached to one side of the weldment and between the shield body and the weldment, forming a local gas protection zone relative to the weld; the welding port 2 at one end of the shield body 1 corresponds to the weld position of the weldment; a gasket 11 disposed on one shield body 1 can form a local gas protection zone independently between the shield body 1 and the other shield body 1; a welding torch adjustment structure 3 is disposed on the shield body 1; the welding torch adjustment structure 3 is disposed corresponding to the position of the welding port 2; the welding torch adjustment structure 3 is used to adjust the height of the welding torch and the welding angle. The protective cover is pressed against the side wall of the workpiece, and the welding torch is installed on the welding torch adjustment mechanism. The height and angle of the welding torch are adjusted through the welding torch adjustment mechanism to ensure that the welding torch is aligned with the weld position, which helps to improve the welding quality. Before welding, inert gas is filled into the protective cover to form a local gas protection at the weld position. This local gas protection blocks air and prevents air from affecting the welding and the quality of the weld. A local gas protection can be formed between a pair of protective covers, which facilitates welding on both sides. A local gas protection can also be formed between the gaskets on one protective cover and the other. When welding on the front side, the gasket on the back protective cover is placed on the back side of the weld, thus forming a local gas protection. This reduces the gas filling time, and the use of gaskets instead of tape prevents tape from sticking to the back side of the weld.

[0023] The protective cover 1 includes arc-shaped side plates 12; a cover plate 13, a strip groove 14, a pipe 15, and a filter screen 16 are respectively provided between a pair of arc-shaped side plates 12; the cover plate 13, the strip groove 14, the pipe 15, and the filter screen 16 are slidably disposed in corresponding grooves 121 on the side wall of the arc-shaped side plate 12; a filter screen 16 is provided between the bottoms of a pair of arc-shaped side plates 12; a strip groove 14 is provided on the filter screen 16; a pipe 15 is disposed between the filter screen 16 and the strip groove 14; the cover plate 13 covers the strip groove 14; an installation hole 133 is opened on the surface of the cover plate 12; the installation hole 133 is located away from the weld joint 2; a gas tower 122 is provided on the installation hole 133; one end of the gas tower 122 is embedded in the installation hole 133, passes through the strip groove 15, and communicates with the pipe 15; this facilitates the installation or removal of the gas tower through the installation hole. After passing through the gas atomizer in the gas tower, the inert gas enters the protective cover through the pipeline, forming a local gas protection between the weld and the side wall of the weldment; the cover plate 13, the strip groove 14, the pipeline 15 and the filter screen 16 are installed in the corresponding grooves, which is convenient for disassembly or installation.

[0024] A groove 123 is provided below the groove 121 on the side wall of the arc-shaped side plate 12; a gasket 11 is provided between a pair of arc-shaped side plates 12; the edge of the gasket 11 is opened in the groove 123; the middle part of the gasket 11 is an elastic structure; the middle part of the gasket 11 protrudes towards the surface of the weldment; the gasket 11 is attached to the surface of the weldment. When welding the front side of the weld, the gasket on the protective cover on the back side moves. The operator can move the gasket by hand or clamp in the groove, thus blocking the back side of the weld. Only the protective cover on the front side needs to be inflated, while the protective cover on the back side does not need to be inflated, reducing inflation time; and the gasket is elastic and protrudes towards the weld position, which can ensure that the gasket is attached to the back side of the weld, avoiding excessive air leakage.

[0025] The bottom of the arc-shaped side plate 12 has a slanted opening 124; the slanted opening 124 has an opening 125; the opening of the latch 125 gradually decreases in size; the latch 125 extends along the length of the arc-shaped side plate 12; the local gas protection zone formed by the openings of the latch 125 is inclined outward; an adhesive strip 126 is provided inside the latch 125; one side of the adhesive strip 126 protrudes outward; the surface of the adhesive strip 126 is attached to the surface of the weldment, and works with the arc-shaped side plate 12 to achieve local sealing. The adhesive strip is provided at the bottom of the arc-shaped side plate of the protective cover, and the adhesive strip extends outward. On the one hand, the adhesive strip adheres to the surface of the weldment, forming local gas protection between the arc-shaped side plates and between the adhesive strips, increasing the sealing effect; on the other hand, the adhesive strip is relatively far from the weld, so it is not easily affected by the high welding temperature during welding, preventing it from sticking to the surface of the weldment.

[0026] The welding torch adjustment structure 3 includes a clamp 31 and a connecting block 32; a fixing block 131 is fixedly provided on the surface of the cover plate 13; an embedding groove 132 is provided on one side of the fixing block 131; the groove opening of the embedding groove 132 is arranged facing the welding port direction; the connecting block 32 includes an extension piece 321 and a mating block 322; the bottom of the mating block 322 is fixed to one end of the extension piece 321; the other end of the extension piece 322 is correspondingly inserted into the embedding groove 132; the clamp 31 is fixed to the mating block 322 by bolts; the clamp 31 is provided corresponding to the welding port 2; and the welding torch is correspondingly provided on the clamp 31. The clamp is installed on the mating block, and then the end of the extension piece away from the mating block extends into the embedding groove. Both the fixing block and the extension piece are provided with threaded holes. When the extension piece extends into the embedding groove, it can be fixed in the fixing block by screws, which can stabilize the clamp and make the clamp face the welding joint position. The welding gun on the clamp can perform positioning welding on the weld joint position.

[0027] The clamp 31 includes a ring tube 311; a connection port 312 is provided on one side of the ring tube 311; a protrusion 313 is fixed at the opening of the connection port 312; a through hole 315 is provided through the protrusion 313; multiple protrusions 313 on one side of the opening of the connection port 312 are spaced vertically; a slot 314 is formed between the protrusions 313 on both sides of the opening of the connection port 312; a through hole 323 is provided through the mating block 322; multiple through holes 323 are spaced vertically; when the slot 314 is engaged with the mating block 322, the through hole 315 is connected to one of the through holes 323; a bolt passes through the through hole 315 and the through hole 323. The ring tube is clamped onto the mating block through the insert, and then the through hole is aligned with the through hole. The ring tube is connected to the mating block by passing a bolt through the through hole and the through hole. Then the welding torch is installed into the ring tube. The through holes on the mating block are spaced at multiple intervals, and the through holes on the protrusions can be aligned with the through holes at different heights, thereby adjusting the height of the clamp and thus achieving the purpose of adjusting the height of the welding torch.

[0028] The protrusion 313 is movably connected to the mating block 322 by bolts; the bottom of the protrusion 313 is provided with an abutment structure 4; the abutment structure 4 is located close to the welding joint 2; the tilt angle between the clamp 31 and the mating block 322 is adjusted, and the abutment end of the abutment structure 4 abuts against the surface of the cover plate 13 to stabilize the clamp 31. The protrusion and the mating block are rotatable. By rotating the protrusion, the ring tube and the welding torch are rotated, and the welding angle of the welding torch is adjusted. When adjusted to the correct position, the protrusion and the mating block can be stabilized by bolts, and the abutment structure abuts against the cover plate. The bolts further increase the stabilizing effect and prevent the ring tube and the welding torch from rotating. The bottom of the protrusion 313 has a movable hole 316; the abutting structure 4 includes an elastic element 41; the elastic element 41 is located inside the movable hole 316, and one end of the elastic element 41 protrudes from the movable hole 316, forming a protruding end; an elastic pad 411 is fixed on the protruding end; the elastic pad 411 abuts against the surface of the cover plate 13; to prevent excessive pressure from damaging the cover plate. The protrusion is rotated, and then secured to the mating block with bolts, with the elastic pad at the bottom of the elastic element abutting against the surface of the cover plate, supporting the protrusion and increasing stability; when the protrusion and the mating block are adjusted to their maximum angle, the elastic element remains in a compressed state, providing support relative to the protrusion and preventing rotation of the protrusion and the ring tube.

[0029] The protrusion 313 has a notch 317 on its side wall; the notch 317 is positioned opposite to the insertion slot 314; the notch 317 is connected to the movable hole 316; a plurality of connected receiving slots 318 are provided on one side of the opening of the notch 317; the plurality of receiving slots 318 are spaced vertically; a rotating block 42 is fitted onto one end of the elastic element 41 that is embedded in the movable hole 316; the rotating block 42 is detachably mounted from the elastic element 41; the rotating block 42 is movably mounted in the movable hole 316; a connecting rod 43 is fixedly mounted on the side wall of the rotating block 42; the end of the connecting rod 43 away from the rotating block 42 extends out of the notch 317; the rotating block 42 can be rotated by the connecting rod 43, and the connecting rod 43 is moved into the receiving slot 318 to position the rotating block 42. The operator uses their hand or a clamp to move the connecting rod up and down within the notch, which in turn moves the rotating block up and down within the movable hole. This increases or decreases the length of the protruding end of the elastic element. By adjusting the length of the protruding end of the elastic element, the connecting rod is rotated and engaged into the receiving port, limiting the position of the rotating block in the movable hole. The length of the protruding end of the elastic element is limited, and by engaging the receiving port at different heights with the connecting rod, the length of the protruding end of the elastic element corresponds accordingly. A longer protruding end of the elastic element exerts greater pressure on the cover plate, while a shorter protruding end exerts less pressure on the cover plate. The limiting function of the connecting rod can adjust the pressure of the protruding end of the elastic element on the cover plate, thereby adjusting the stability of the support for the protrusion, ensuring the stability of the clamp and welding torch after angle adjustment, and preventing the clamp from rotating during welding.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, several improvements and changes can be made without departing from the above principles of the present invention, and these improvements and changes are also considered to be within the scope of protection of the present invention.

Claims

1. A gas shield for welding titanium alloys, characterized in that: The system includes a protective cover; a pair of protective covers are positioned opposite each other on the front and back of the weld; the pair of protective covers are attached to one side of the workpiece and between it and the workpiece, forming a local gas protection zone relative to the weld; the welding port at one end of each protective cover corresponds to the weld position of the workpiece; a gasket provided on one of the protective covers can independently form a local gas protection zone between the other protective cover; a welding torch adjustment structure is provided on each protective cover; the welding torch adjustment structure is positioned corresponding to the welding port; the welding torch adjustment structure is used to adjust the welding torch height and welding angle. The welding torch adjustment structure includes a clamp and a connecting block; the protective cover includes arc-shaped side plates; a cover plate, a strip groove, a pipe, and a filter screen are respectively provided between a pair of arc-shaped side plates; a fixing block is fixed to the surface of the cover plate; an embedding groove is opened on one side of the fixing block; the opening of the embedding groove faces the welding port; the connecting block includes an extension piece and a mating block; the bottom of the mating block is fixed to one end of the extension piece; the other end of the extension piece is correspondingly inserted into the embedding groove; the clamp is fixed to the mating block by bolts; the clamp is positioned corresponding to the welding port; the welding torch is correspondingly mounted on the clamp; The clamp includes a ring tube; a connection port is provided on one side of the ring tube; a protrusion is fixed at the opening of the connection port; a through hole is provided through the protrusion; multiple protrusions on one side of the connection port are spaced vertically; a fitting is formed between the protrusions on both sides of the connection port opening; a through hole is provided through the mating block; multiple through holes are spaced vertically; when the fitting is engaged with the mating block, the through hole and one of the through holes are connected; a bolt passes through the through hole and the through hole. The protrusion can be movably connected to the mating block by bolts; the bottom of the protrusion is provided with an abutting structure; the abutting structure is located close to the weld joint; the tilt angle between the clamp and the mating block is adjusted, and the abutting end of the abutting structure abuts against the surface of the cover plate to stabilize the clamp; The bottom of the protrusion has a movable hole; the abutting structure includes an elastic element; the elastic element is disposed in the movable hole, and one end of the elastic element protrudes from the movable hole, which is the protruding end; an elastic pad is fixed on the protruding end; the elastic pad abuts against the surface of the cover plate. The protrusion has a notch on its sidewall; the notch is positioned opposite to the insertion port; the notch communicates with the movable hole; multiple interconnected receiving ports are provided on one side of the notch opening; the multiple receiving ports are spaced vertically; a rotating block is fitted onto one end of the elastic element embedded in the movable hole; the rotating block and the elastic element are detachably connected; the rotating block is movably positioned within the movable hole; a connecting rod is fixed to the sidewall of the rotating block; the end of the connecting rod away from the rotating block extends out of the notch; the rotating block can be rotated by the connecting rod, and the connecting rod moves into the receiving port to position the rotating block.

2. The titanium alloy welded gas shield according to claim 1, wherein: The cover plate, strip groove, pipe, and filter screen are slidably disposed in corresponding grooves on the side wall of the arc-shaped side plate; a filter screen is disposed between the bottoms of a pair of arc-shaped side plates; a strip groove is disposed on the filter screen; a pipe is disposed between the filter screen and the strip groove; the cover plate is disposed on the strip groove; an installation hole is provided on the surface of the cover plate; the installation hole is disposed away from the weld joint; a gas pylon is disposed on the installation hole; one end of the gas pylon is embedded in the installation hole, passes through the strip groove, and communicates with the pipe.

3. The titanium alloy welded gas shield in accordance with claim 2, wherein: A sliding groove is provided below the corresponding groove on the side wall of the arc-shaped side plate; a gasket is provided between a pair of arc-shaped side plates; the edge of the gasket is opened in the sliding groove; the middle part of the gasket is an elastic structure; the middle part of the gasket protrudes towards the surface of the weldment; the gasket is attached to the surface of the weldment.

4. The titanium alloy welded gas shield in accordance with claim 3, wherein: The bottom of the arc-shaped side plate has an oblique opening; a latch is provided on the oblique opening; the opening of the latch gradually decreases; the latch extends along the length of the arc-shaped side plate; the local gas protection zone formed by the openings of the latch is inclined outward; an adhesive strip is provided inside the latch; one side of the adhesive strip protrudes outward; the surface of the adhesive strip is attached to the surface of the weldment, and works with the arc-shaped side plate to achieve local sealing.

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