CN109365944B - Induction brazing device for bent pipe joint and welding method thereof - Google Patents

Induction brazing device for bent pipe joint and welding method thereof Download PDF

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Publication number
CN109365944B
CN109365944B CN201811422238.8A CN201811422238A CN109365944B CN 109365944 B CN109365944 B CN 109365944B CN 201811422238 A CN201811422238 A CN 201811422238A CN 109365944 B CN109365944 B CN 109365944B
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China
Prior art keywords
pipe joint
temperature
bent pipe
argon
groove
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CN201811422238.8A
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CN109365944A (en
Inventor
乔勇
王英
刘明
刘文博
李松
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AECC Shenyang Liming Aero Engine Co Ltd
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AECC Shenyang Liming Aero Engine Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K3/00Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
    • B23K3/08Auxiliary devices therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K3/00Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
    • B23K3/06Solder feeding devices; Solder melting pans
    • B23K3/0607Solder feeding devices
    • B23K3/0623Solder feeding devices for shaped solder piece feeding, e.g. preforms, bumps, balls, pellets, droplets

Abstract

An induction brazing device for bent pipe joints comprises a heat conduction base, wherein a first groove is formed in the upper surface of the heat conduction base, the bent pipe joint is placed in the first groove, a to-be-welded end of the bent pipe joint vertically extends upwards to the upper side of the heat conduction base, a high-temperature-resistant glass pipe is sleeved outside the to-be-welded end of the bent pipe joint and fixedly assembled with the upper surface of the heat conduction base, a first argon channel and a second argon channel are formed in the heat conduction base, an air guide jacking mechanism is arranged in the first argon channel, one end of the air guide jacking mechanism is communicated with an argon source, the other end of the air guide jacking mechanism is communicated with an inner cavity of the bent pipe joint, one end of the second argon channel is communicated with the argon source, the other end of the second argon channel is communicated with the, inserting a pipeline matched with the bent pipe joint into the end to be welded of the bent pipe joint, and arranging a brazing ring at the joint of the bent pipe joint and the bent pipe joint; the invention simplifies the welding procedure, obviously improves the processing efficiency and simultaneously improves the welding quality.

Description

Induction brazing device for bent pipe joint and welding method thereof
Technical Field
The invention belongs to the technical field of induction brazing, and particularly relates to an induction brazing device for a bent pipe joint and a welding method thereof.
Background
A large number of bent pipe joints exist in an aircraft engine pipeline, flame brazing is generally adopted when the bent pipe joints are brazed with matched pipe fittings, the efficiency is low, the working procedure is long, the welding quality is poor, and the product delivery cycle is influenced.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an induction brazing device for a bent pipe joint and a welding method thereof, which can replace the traditional flame brazing, obviously improve the welding quality and efficiency, and meet the product quality and delivery requirements, and the technical scheme is as follows:
an induction brazing device for bent pipe joints comprises a heat conduction base, wherein a first groove is formed in the upper surface of the heat conduction base, the bent pipe joint is placed in the first groove, a to-be-welded end of the bent pipe joint vertically extends upwards to the upper side of the heat conduction base, a high-temperature-resistant glass pipe is sleeved outside the to-be-welded end of the bent pipe joint and fixedly assembled with the upper surface of the heat conduction base, a first argon channel and a second argon channel are formed in the heat conduction base, an air guide jacking mechanism is arranged in the first argon channel, one end of the air guide jacking mechanism is communicated with an argon source, the other end of the air guide jacking mechanism is communicated with an inner cavity of the bent pipe joint, one end of the second argon channel is communicated with the argon source, the other end of the second argon channel is communicated with the inner cavity of the high-temperature-resistant glass pipe, a high-frequency induction, the joint of the two is provided with a solder ring.
The air guide jacking mechanism comprises a retaining ring, a compression spring, a first air pipe and a push pipe, wherein the retaining ring is fixedly assembled with the inner wall of a first argon channel, one end of the compression spring is fixedly assembled with the retaining ring, the other end of the compression spring is fixedly assembled with one end of the push pipe, the other end of the push pipe is provided with an outer conical surface matched with the inner conical surface of the bent pipe joint, the outer conical surface is attached to the inner conical surface, one end of the first air pipe is communicated with an argon gas source, and the other end of the first air pipe penetrates through the retaining ring and the one end of the compression spring which is communicated with the push pipe.
The second argon gas channel comprises a second groove and a second air pipe, the second groove is formed in the bottom of the first groove, the second groove is communicated with an inner cavity of the high-temperature-resistant glass pipe, one end of the second air pipe is communicated with an argon gas source, and the other end of the second air pipe penetrates through the side wall of the heat-conducting base and is communicated with the second groove.
The induction brazing device further comprises a first high-temperature-resistant rubber sheet and a second high-temperature-resistant rubber sheet, the first high-temperature-resistant rubber sheet is sleeved on the outer wall of the pipeline matched with the bent pipe joint, the first high-temperature-resistant rubber sheet covers the top of the high-temperature-resistant glass pipe, and the second high-temperature-resistant rubber sheet covers the top of the first groove, so that the first groove and the inner cavity of the high-temperature-resistant glass pipe form a closed space.
An induction brazing welding method for bent pipe joints, which adopts the induction brazing device for bent pipe joints, comprises the following steps:
step 1, placing the bent pipe joint in a first groove, attaching an outer conical surface at the right end of a top pipe to an inner conical surface of the bent pipe joint, and tightly supporting and fixing the bent pipe joint in the first groove under the action of a compression spring;
step 2, inserting a pipeline matched with the bent pipe joint into a to-be-welded end of the bent pipe joint, arranging a proper amount of brazing ring at the joint of the bent pipe joint and the bent pipe joint, rightly placing the pipeline matched with the bent pipe joint in the center of an inner cavity of a high-temperature-resistant glass tube, sleeving a first high-temperature-resistant rubber sheet on the outer wall of the pipeline matched with the bent pipe joint, covering the first high-temperature-resistant rubber sheet on the top of the high-temperature-resistant glass tube, covering the bent pipe joint with a second high-temperature-resistant rubber sheet on the top of a first groove, and enabling an area to be welded to form a sealed;
step 3, sleeving a high-frequency induction coil on the outer side of the high-temperature-resistant glass tube, respectively introducing argon into the first air tube and the second air tube, so that the inner cavity of the bent tube joint and the inner cavity of the high-temperature-resistant glass tube are respectively filled with argon, and electrifying and heating the high-frequency induction coil to melt a brazing filler metal ring at the position to be welded;
and 4, stopping heating, leading out heat of the welding area through the heat conduction base, and stopping introducing argon after the bent pipe joint is cooled.
Compared with the prior art, the invention has the beneficial effects that: the pipeline with the bent pipe joint on the aero-engine is welded by the device and the method, so that the welding process is simplified, the operation difficulty is reduced, a welder can meet the operation requirement through simple training, meanwhile, the brazing requirement can be met by replacing brazing flux with argon protection, the complex process of removing the brazing flux by a chemical method is omitted, the machining efficiency is obviously improved, meanwhile, the welding quality is obviously higher than that of flame brazing, and extra weld bead finishing is not needed.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic cross-sectional view of A in FIG. 1;
fig. 3 is a schematic view of a connection structure of an elbow pipe joint and a pipeline matched with the elbow pipe joint according to the present invention.
Wherein: a heat conductive base 1; a first groove 2; a bent pipe joint 3; a high temperature glass tube 4; a first argon gas channel 5; a second argon gas channel 6; a second groove 61; a second air pipe 62; an air guide jacking mechanism 7; a retainer ring 71; a compression spring 72; a first air pipe 73; a top pipe 74; a high-frequency induction coil 8; a pipeline 9 matched with the bent pipe joint; a solder ring 10; a first high temperature resistant rubber 11; and a second high temperature resistant rubber 12.
Detailed Description
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
As shown in figures 1 to 3, the invention provides an induction brazing device for a bent pipe joint, which comprises a heat conduction base 1, wherein a first groove 2 is formed in the upper surface of the heat conduction base 1, a bent pipe joint 3 is placed in the first groove 2, the end to be welded of the bent pipe joint 3 vertically extends upwards to the upper side of the heat conduction base 1, a high-temperature resistant glass pipe 4 is sleeved outside the end to be welded of the bent pipe joint 3, the high-temperature resistant glass pipe 4 is fixedly assembled with the upper surface of the heat conduction base 1, a first argon channel 5 and a second argon channel 6 are formed in the heat conduction base 1, an air guide abutting mechanism 7 is arranged in the first argon channel 5, one end of the air guide abutting mechanism 7 is communicated with an argon source, the other end of the air guide abutting mechanism is communicated with the inner cavity of the bent pipe joint 3, one end of the second argon channel 6 is communicated with the argon source, the other end of the second argon channel is communicated with, the pipeline 9 matched with the bent pipe joint is inserted into the end to be welded of the bent pipe joint 3, and a brazing ring 10 is arranged at the joint of the two.
Specifically, the heat conducting base 1 may be made of copper, aluminum or other materials with excellent heat conducting property.
The air guide jacking mechanism 7 comprises a blocking ring 71, a compression spring 72, a first air pipe 73 and a top pipe 74, the blocking ring 71 is fixedly assembled with the inner wall of the first argon channel 5, one end of the compression spring 72 is fixedly assembled with the blocking ring 71, the other end of the compression spring 72 is fixedly assembled with one end of the top pipe 74, the other end of the top pipe 74 is provided with an outer conical surface matched with the inner conical surface of the bent pipe joint 3, the outer conical surface is attached to the inner conical surface, one end of the first air pipe 73 is communicated with an argon gas source, the other end of the first air pipe 73 penetrates through the blocking ring 71 and the compression spring 72 to be communicated with one end of the top pipe 74, the air guide jacking mechanism 7 jacks and fixes the bent pipe joint 3 in the first groove 2, poor welding caused by misoperation of a welder is avoided, and welding quality is further improved.
Second argon gas passageway 6 includes second recess 61 and second trachea 62, and second recess 61 is seted up in 2 bottoms of first recess, and second recess 61 communicates with the inner chamber of high temperature resistant glass pipe 4, and the one end and the argon gas source intercommunication of second trachea 62, and the other end of second trachea 62 runs through heat conduction base 1 lateral wall and second recess 61 intercommunication.
The induction brazing device further comprises a first high-temperature-resistant rubber sheet 11 and a second high-temperature-resistant rubber sheet 12, the outer wall of a pipeline 9 matched with the bent pipe joint is arranged in a sleeved mode through the first high-temperature-resistant rubber sheet 11, the first high-temperature-resistant rubber sheet 11 covers the top of the high-temperature-resistant glass pipe 4, the second high-temperature-resistant rubber sheet 12 covers the top of the first groove 2, the first groove 2 and the inner cavity of the high-temperature-resistant glass pipe 4 form a closed space, under the condition that a small amount of argon gas is introduced, the bent pipe joint 3 can be made to be located in an argon gas protection atmosphere with a welding area, and the using.
An induction brazing welding method for a bent pipe joint 3, which adopts the induction brazing device for the bent pipe joint, comprises the following steps:
step 1, placing the bent pipe joint 3 in a first groove 2, attaching an outer conical surface at the right end of a top pipe 74 to an inner conical surface of the bent pipe joint 3, and tightly supporting and fixing the bent pipe joint 3 in the first groove 2 under the action of a compression spring 72;
step 2, inserting a pipeline 9 matched with the bent pipe joint into a to-be-welded end of the bent pipe joint 3, presetting a proper amount of brazing filler metal rings 10 at the joint of the two, sleeving the brazing filler metal rings at the to-be-welded position, rightly placing the pipeline 9 matched with the bent pipe joint at the center of an inner cavity of a high-temperature-resistant glass pipe 4, sleeving a first high-temperature-resistant rubber sheet 11 on the outer wall of the pipeline 9 matched with the bent pipe joint and covering the outer wall of the pipeline 9 on the top of the high-temperature-resistant glass pipe 4, covering a second high-temperature-resistant rubber sheet 12 on the top of a first groove 2, covering the bent pipe joint 3, and enabling a to-be;
step 3, sleeving the high-frequency induction coil 8 on the outer side of the high-temperature-resistant glass tube 4, respectively introducing argon into the first air tube 73 and the second air tube 62, respectively filling the inner cavity of the bent tube joint 3 and the inner cavity of the high-temperature-resistant glass tube 4 with argon, respectively enabling the bent tube joint 3 and the area to be welded to be in an argon protective atmosphere, and electrifying and heating the high-frequency induction coil 8 to melt the brazing filler metal ring 10 at the position to be welded;
and 4, stopping heating, leading out heat of the welding area through the heat conduction base 1, and stopping introducing argon after the bent pipe joint 3 is cooled, and then welding the next part.
The above examples are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above examples, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (2)

1. An induction brazing device for bent pipe joints is characterized by comprising a heat conduction base, wherein a first groove is formed in the upper surface of the heat conduction base, the bent pipe joint is placed in the first groove, the end to be welded of the bent pipe joint vertically extends upwards to the upper side of the heat conduction base, a high-temperature-resistant glass pipe is sleeved outside the end to be welded of the bent pipe joint, the high-temperature-resistant glass pipe is fixedly assembled with the upper surface of the heat conduction base, a first argon channel and a second argon channel are formed in the heat conduction base, an air guide jacking mechanism is arranged in the first argon channel, one end of the air guide jacking mechanism is communicated with an argon source, the other end of the air guide jacking mechanism is communicated with an inner cavity of the bent pipe joint, one end of the second argon channel is communicated with the argon source, the other end of the second argon channel is communicated with the inner cavity of the high-temperature-resistant glass pipe, a, a brazing ring is arranged at the joint of the two;
the gas guide jacking mechanism comprises a baffle ring, a compression spring, a first gas pipe and a top pipe, wherein the baffle ring is fixedly assembled with the inner wall of the first argon channel, one end of the compression spring is fixedly assembled with the baffle ring, the other end of the compression spring is fixedly assembled with one end of the top pipe, the other end of the top pipe is provided with an external conical surface matched with the inner conical surface of the bent pipe joint, the external conical surface is attached to the inner conical surface, one end of the first gas pipe is communicated with an argon gas source, and the other end of the first gas pipe penetrates through the baffle ring and the compression spring to be communicated with one end of the top pipe;
the second argon channel comprises a second groove and a second air pipe, the second groove is formed in the bottom of the first groove and is communicated with an inner cavity of the high-temperature-resistant glass pipe, one end of the second air pipe is communicated with an argon gas source, and the other end of the second air pipe penetrates through the side wall of the heat-conducting base and is communicated with the second groove;
the high-temperature-resistant rubber pipe joint is characterized by further comprising a first high-temperature-resistant rubber and a second high-temperature-resistant rubber, the first high-temperature-resistant rubber is sleeved on the outer wall of the pipeline matched with the bent pipe joint, the first high-temperature-resistant rubber covers the top of the high-temperature-resistant glass pipe, and the second high-temperature-resistant rubber covers the top of the first groove, so that the first groove and the inner cavity of the high-temperature-resistant glass pipe form a closed space.
2. An induction brazing welding method for an elbow fitting using the induction brazing apparatus for an elbow fitting according to claim 1, comprising the steps of:
step 1, placing the bent pipe joint in a first groove, attaching an outer conical surface at the right end of a top pipe to an inner conical surface of the bent pipe joint, and tightly supporting and fixing the bent pipe joint in the first groove under the action of a compression spring;
step 2, inserting a pipeline matched with the bent pipe joint into a to-be-welded end of the bent pipe joint, arranging a proper amount of brazing ring at the joint of the bent pipe joint and the bent pipe joint, rightly placing the pipeline matched with the bent pipe joint in the center of an inner cavity of a high-temperature-resistant glass tube, sleeving a first high-temperature-resistant rubber sheet on the outer wall of the pipeline matched with the bent pipe joint, covering the first high-temperature-resistant rubber sheet on the top of the high-temperature-resistant glass tube, covering the bent pipe joint with a second high-temperature-resistant rubber sheet on the top of a first groove, and enabling an area to be welded to form a;
step 3, sleeving a high-frequency induction coil on the outer side of the high-temperature-resistant glass tube, respectively introducing argon into the first air tube and the second air tube, so that the inner cavity of the bent tube joint and the inner cavity of the high-temperature-resistant glass tube are respectively filled with argon, and electrifying and heating the high-frequency induction coil to melt a brazing filler metal ring at the position to be welded;
and 4, stopping heating, leading out heat of the welding area through the heat conduction base, and stopping introducing argon after the bent pipe joint is cooled.
CN201811422238.8A 2018-11-27 2018-11-27 Induction brazing device for bent pipe joint and welding method thereof Active CN109365944B (en)

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Application Number Priority Date Filing Date Title
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CN109365944B true CN109365944B (en) 2020-12-01

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201446328U (en) * 2009-05-31 2010-05-05 徐州华谐科技发展有限公司 Superhard abrasive wire saw device for manufacturing induction brazing
CN102211235A (en) * 2011-04-18 2011-10-12 哈尔滨工业大学 Soldering method and device of heterogeneous stainless steel oil injection nozzle nut of engine
CN202963709U (en) * 2012-12-14 2013-06-05 郑州机械研究所 Device suitable for magnesium alloy argon shield high-frequency induction soldering
CN105345348A (en) * 2015-11-24 2016-02-24 沈阳黎明航空发动机(集团)有限责任公司 Locating device for welding guide pipe connector at any angle
CN106624243A (en) * 2016-11-27 2017-05-10 沈阳黎明航空发动机(集团)有限责任公司 Induction brazing method for guide pipe with elbow pipe joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201446328U (en) * 2009-05-31 2010-05-05 徐州华谐科技发展有限公司 Superhard abrasive wire saw device for manufacturing induction brazing
CN102211235A (en) * 2011-04-18 2011-10-12 哈尔滨工业大学 Soldering method and device of heterogeneous stainless steel oil injection nozzle nut of engine
CN202963709U (en) * 2012-12-14 2013-06-05 郑州机械研究所 Device suitable for magnesium alloy argon shield high-frequency induction soldering
CN105345348A (en) * 2015-11-24 2016-02-24 沈阳黎明航空发动机(集团)有限责任公司 Locating device for welding guide pipe connector at any angle
CN106624243A (en) * 2016-11-27 2017-05-10 沈阳黎明航空发动机(集团)有限责任公司 Induction brazing method for guide pipe with elbow pipe joint

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
不锈钢导管钎焊技术研究;王伟;《沈阳航空航天大学学报》;20131231;第30卷(第06期);第29-33页 *

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