Gas protection adjustable device for part welding

Abstract

The invention discloses a gas protection adjustable device for part welding. The gas protection adjustable device comprises an outer shell, an inner cavity shell and a limiting rod, wherein the inner cavity shell is arranged in the outer shell and slides in the axial direction of the outer shell, and the limiting rod is movably connected between the outer shell and the inner cavity shell. The outer shell comprises an upper outer shell air outlet hole and a lower outer shell air outlet hole which are correspondingly formed in the two opposite sides of the outer shell, and an upper limiting groove and a lower limiting groove which are formed in the two opposite sides of the outer shell in a staggered mode; one end of the inner cavity shell protrudes in the axial direction of the outer shell; an inner cavity upper air outlet and an inner cavity lower air outlet are formed in the two opposite sides of the inner cavity shell and are arranged in a staggered mode. The limiting rod penetrates through the inner cavity shell to be connected with the upper limiting groove or the lower limiting groove. The device can perform argon protection on the back surface of the welding seam, effectively guarantees the quality of the welding seam, is adjustable in ventilation size and direction, and is high in universality.

Description

Technical Field

[0001] The invention belongs to the technical field of parts welding, and specifically relates to an adjustable gas protection device for parts welding, and in particular to an adjustable device for back side gas protection when welding special-shaped parts such as support plates. Background Art

[0002] In order to meet the high temperature and high pressure requirements of aircraft engines, titanium alloys, high-temperature alloys and other materials are widely used in the manufacture of casing parts. Titanium alloy and high-temperature alloy parts are prone to oxidation color and inclusions due to oxidation during welding, which has a great impact on the quality of the weld. In order to ensure the mechanical properties of the parts are stable and reliable, the back of the weld needs to be protected by gas to improve the quality of the weld.

[0003] Patent application number 201811487526.1 discloses a gas protection device for cabin circumferential seam welding, characterized in that it includes: a front protection device and / or a back protection device; wherein the front protection device includes: a tail protection hood; the tail protection hood is used to allow the protective gas to enter the tail protection hood through the air pipe, and after a certain pressure distribution is formed inside, it acts on the molten pool and the high-temperature part of the front of the weld; the back protection device includes: a sealing device; the sealing device is used to seal the two ends of the cabin; the sealing device is provided with an air inlet and an exhaust hole, the air inlet is used to allow the protective gas to pass into the cabin, and the exhaust hole is used to discharge the air in the cabin. The gas flow rate and gas outflow direction of the gas protection device cannot be adjusted, and cannot meet the processing requirements of special parts. Summary of the invention

[0004] In order to solve the above problems, the present invention aims to provide an adjustable gas protection device for parts welding.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An adjustable gas shielding device for parts welding, characterized in that it comprises an outer shell, an inner shell arranged in the outer shell and sliding along the axial direction thereof, and a limiting rod movably connected between the outer shell and the inner shell;

[0007] The outer shell includes an upper air outlet hole and a lower air outlet hole correspondingly arranged on two opposite sides thereof, and an upper limit groove and a lower limit groove staggeredly arranged on two opposite sides thereof;

[0008] The inner cavity shell has one end protruding along the axial direction of the outer cavity shell; an inner cavity upper air outlet hole and an inner cavity lower air outlet hole are arranged on opposite sides of the inner cavity shell, and the inner cavity upper air outlet hole and the inner cavity lower air outlet hole are arranged in a staggered manner;

[0009] The limiting rod passes through the inner cavity shell and is connected to the upper limit groove or the lower limit groove; when the limiting rod is connected to the upper limit groove, the lower air outlet of the outer shell is connected to the lower air outlet of the inner cavity; when the limiting rod is connected to the lower limit groove, the upper air outlet of the outer shell is connected to the upper air outlet of the inner cavity;

[0010] The ventilation nozzle is arranged at the protruding end of the inner cavity shell.

[0011] The protruding end of the inner cavity shell is provided with a detachably connected inner cavity cover.

[0012] A threaded hole is arranged in the middle of the inner cavity cover, and the ventilation nozzle is installed in the threaded hole.

[0013] One end of the outer shell is provided with a detachably connected outer shell cover; the outer shell cover is arranged opposite to the protruding end of the inner cavity shell.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The invention discloses an adjustable gas shielding device for parts welding, wherein air outlet holes are respectively arranged on opposite sides of an outer shell and an inner shell. By sliding the inner shell in the outer shell, the ventilation size and direction of the air outlet holes on both sides can be adjusted respectively, thereby enhancing applicability and reducing the number of repeated disassembly and assembly.

[0016] The invention discloses an adjustable gas protection device for parts welding, comprising an outer shell, an inner shell and a limit rod, which has a simple structure, is easy to manufacture and has good portability, and can provide effective ventilation protection for the back part of support plate parts during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A cross-sectional view of an adjustable gas shielding device for parts welding in the present invention;

[0019] Figure 2 for Figure 1 X-direction view;

[0020] Figure 3 for Figure 1 Y-direction view;

[0021] Figure 4 It is a schematic diagram of the first gas outlet direction of the gas protection adjustable device;

[0022] Figure 5It is a schematic diagram of the second gas outlet direction of the gas protection adjustable device;

[0023] Figure numerals: 1 - outer shell, 11 - upper air vent of outer shell, 12 - lower air vent of outer shell, 13 - upper limit groove, 14 - lower limit groove, 2 - outer shell cover, 3 - outer shell screw, 4 - inner cavity shell, 41 - upper air vent of inner cavity, 42 - lower air vent of inner cavity, 5 - inner cavity cover, 6 - inner cavity screw, 7 - ventilation nozzle, 8 - limit rod. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0025] Reference Figures 1 to 3 The present invention discloses an adjustable gas shielding device for parts welding. The device can be used for welding special-shaped parts such as support plates with inner cavity features, such as turbine support support plates. It can effectively ensure the weld quality of such parts while taking into account the requirements of economy and versatility.

[0026] The device comprises an outer shell 1, an inner shell 4 which is arranged in the outer shell 1 and slides along the axial direction thereof, and a limiting rod 8 which is movably connected between the outer shell 1 and the inner shell 4;

[0027] The outer shell 1 includes an upper air outlet 11 and a lower air outlet 12 correspondingly arranged on opposite sides thereof, and an upper limit groove 13 and a lower limit groove 14 staggeredly arranged on opposite sides thereof; a detachably connected outer shell cover 2 is arranged at one end of the outer shell 1; the outer shell cover 2 is arranged opposite to the protruding end of the inner cavity shell 4. In this embodiment, the outer shell cover 2 is assembled and connected to the outer shell 1 by means of an outer shell screw 3. The limit groove is used to limit the axial displacement of the limit rod 8.

[0028] The inner cavity shell 4 has one end protruding axially along the outer cavity shell 1, and a detachably connected inner cavity cover 5 is provided at the protruding end of the inner cavity shell 4. In this embodiment, the inner cavity cover 5 and the inner cavity shell 4 are assembled and connected by inner cavity screws 6.

[0029] A threaded hole is provided in the middle of the inner cavity cover 5 , and a vent nozzle 7 is installed in the threaded hole to enable the protective gas to be introduced into the inner cavity shell 4 from the vent nozzle 7 .

[0030] An upper air outlet hole 41 and a lower air outlet hole 42 are arranged on opposite sides of the inner cavity shell 4, and the upper air outlet hole 41 and the lower air outlet hole 42 are staggered; when the inner cavity shell 4 slides in the outer cavity shell 1, the size of the upper air outlet hole 11 or the lower air outlet hole 12 of the outer shell can be adjusted with the cooperation of the upper air outlet hole 41 and the lower air outlet hole 42, so as to protect the uniform outflow of gas.

[0031] The limiting rod 8 passes through the inner cavity shell 4 and is connected to the upper limit groove 13 or the lower limit groove 14; when the limiting rod 8 is connected to the upper limit groove 13, the lower air outlet 12 of the outer shell is connected to the lower air outlet 42 of the inner cavity; when the limiting rod 8 is connected to the lower limit groove 14, the upper air outlet 11 of the outer shell is connected to the upper air outlet 41 of the inner cavity.

[0032] Specifically, the inner cavity shell 4 can slide axially in the outer cavity shell 1, and the limit rod 8 passes through the inner cavity shell 4 to the upper limit groove 13 or the lower limit groove 14 of the outer cavity shell 1. The sliding inner cavity shell 4 can adjust the gas outlet flow rate of the upper gas outlet hole 11 or the lower gas outlet hole 12 of the outer shell, thereby achieving the purpose of controlling the gas outlet flow rate.

[0033] Reference Figure 4 The inner cavity shell 4 slides toward the outer shell cover 2, and the limit rod 8 gradually extends into the upper limit groove 13. At this time, the outlet part of the air outlet hole 11 on the outer shell gradually decreases until it is completely closed, and the lower air outlet hole 12 of the outer shell is connected with the lower air outlet hole 42 of the inner cavity to realize ventilation in the lower direction.

[0034] Reference Figure 5 The inner cavity shell 4 slides toward the ventilation nozzle 7, and the limit rod 8 gradually slides into the lower limit groove 14. At this time, the outlet part of the lower air outlet 12 of the outer shell gradually decreases until it is completely closed, and the upper air outlet 11 of the outer shell is connected with the upper air outlet 41 of the inner cavity to realize ventilation in the upper direction.

[0035] The adjustable gas protection device for parts welding of the present invention has a simple structure, is easy to manufacture and has good portability; the ventilation size and direction are adjustable and the versatility is strong.

[0036] The above is a detailed introduction to a gas shielding adjustable device for parts welding provided by the present invention. The structure and working principle of the present invention are described in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An adjustable gas shielding device for parts welding, characterized in that: It comprises an outer shell (1), an inner shell (4) which is arranged in the outer shell (1) and slides along the axial direction thereof, and a limiting rod (8) which is movably connected between the outer shell (1) and the inner shell (4); The outer shell (1) comprises an upper air outlet (11) and a lower air outlet (12) arranged on two opposite sides thereof, and an upper limit groove (13) and a lower limit groove (14) arranged on two opposite sides thereof in a staggered manner; The inner cavity shell (4) has one end protruding along the axial direction of the outer cavity shell (1); an inner cavity upper air outlet hole (41) and an inner cavity lower air outlet hole (42) are arranged on opposite sides of the inner cavity shell (4), and the inner cavity upper air outlet hole (41) and the inner cavity lower air outlet hole (42) are arranged in a staggered manner; The limiting rod (8) passes through the inner cavity shell (4) and is connected to the upper limit groove (13) or the lower limit groove (14); when the limiting rod (8) is connected to the upper limit groove (13), the lower air outlet hole (12) of the outer shell is communicated with the lower air outlet hole (42) of the inner cavity; when the limiting rod (8) is connected to the lower limit groove (14), the upper air outlet hole (11) of the outer shell is communicated with the upper air outlet hole (41) of the inner cavity; A ventilation nozzle (7) is arranged at the protruding end of the inner cavity shell (4).

2. The adjustable gas shielding device for parts welding according to claim 1 is characterized in that: The protruding end of the inner cavity housing (4) is provided with a detachably connected inner cavity cover (5).

3. The adjustable gas shielding device for parts welding according to claim 2 is characterized in that: A threaded hole is arranged in the middle of the inner cavity cover (5), and the ventilation nozzle (7) is installed in the threaded hole.

4. The adjustable gas shielding device for parts welding according to claim 1 is characterized in that: One end of the outer shell (1) is provided with a detachably connected outer shell cover (2); the outer shell cover (2) is arranged opposite to the protruding end of the inner cavity shell (4).

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