Titanium alloy guide pipe induction brazing heating auxiliary device

Abstract

The utility model relates to the technical field of welding, in particular to a titanium alloy conduit induction brazing heating auxiliary device which comprises a supporting frame used for being placed in a conduit body, a positioning boss arranged on the supporting frame and used for fixing an end head, a fastening clamp used for fastening the conduit body, and a heat gathering ring which is used for adjusting an induction coil after being bent and is embedded. According to the utility model, the welding part of the to-be-welded part is placed in the alternating magnetic field, a local heating method is realized through the induction current of the heat gathering ring, and the induction coil is used as a heating source to melt the brazing filler metal ring, so that the purpose of welding is achieved, the fit clearance and the heating source are controlled in a pure argon gas environment, and the visual and accurate quality repair of the titanium alloy conduit is realized; the current titanium alloy guide pipe welding problem is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to an induction brazing heating auxiliary device for titanium alloy conduits. Background Art

[0002] Induction brazing is to weld the area to be welded through the eddy current effect and skin effect generated by high-frequency induction current. It is a relatively advanced conduit connection manufacturing technology adopted in the field of modern aircraft manufacturing. Due to the activity of titanium alloy and its sensitivity to heating, good bead protection and reasonable welding process are the keys to ensuring the welding quality of the weld seam. To reduce the oxidation problem during welding, atmosphere protection is achieved in a vacuum chamber. For the induction brazing heat source, the heat is distributed in an onion shape on the surface of the pipe body, and the heat gradually decreases from the outside to the inside, which is relatively dispersed. At the same time, the matching clearance and perpendicularity between the conduit and the end part are strictly required to ensure the weld quality, generally 0.01 - 0.1 mm. The existing process requires the operator to hold the conduit and the end part to cooperate, and the two rotate relative to each other without jamming to control the clearance. At the same time, the welding quality cannot be guaranteed, and the quality fluctuates greatly. By designing a new auxiliary device, controlling the clearance range and gathering the heat source, the welding uniformity of titanium alloy conduits is improved. On this basis, a protection tooling is further designed to enable welding repair to be achieved under this set of auxiliary devices, effectively controlling the welding quality fluctuation, ultimately reducing the production cost and improving the welding quality of the product. Currently, there is no process equipment in China that meets this requirement. Summary of the Invention

[0003] In order to solve the above problems, the utility model proposes an induction brazing heating auxiliary device for titanium alloy conduits.

[0004] An induction brazing heating auxiliary device for titanium alloy conduits includes a support frame for placing the conduit body, a positioning boss arranged on the support frame for fixing the end, a fastening clip for fastening the conduit body, and a heat-gathering ring adjusted by bending the induction coil and embedded therein.

[0005] The support frame is divided into three parts. The upper part has a positioning groove, the middle part is a hand-held handle pre-treated by rolling, and the lower part is a support platform.

[0006] The beneficial effect of the utility model is that the welding part of the workpiece to be welded is placed in an alternating magnetic field, and local heating is realized through the induced current of the heat-gathering ring. The induction coil is used as the heat source to melt the brazing filler metal ring to achieve the purpose of welding. In a pure argon environment, the matching clearance and heat source are controlled to achieve the visual and precise quality repair of titanium alloy conduits, so as to solve the current welding problems of titanium alloy conduits. Brief Description of the Drawings

[0007] The following further illustrates the utility model with reference to the drawings and embodiments.

[0008] Figure 1 Schematic diagram of the induction brazing joint structure of the present utility model;

[0009] Figure 2 Schematic diagram of the induction brazing heating form structure of the present utility model Figure 1 ;

[0010] Figure 3 Schematic diagram of the induction brazing heating form structure of the present utility model Figure 2 ;

[0011] Figure 4 Front view structure schematic diagram of the present utility model;

[0012] Figure 5 Top view structure schematic diagram of the present utility model;

[0013] Figure 6 Schematic diagram of the heat collecting ring structure of the present utility model;

[0014] Figure 7 For the present utility model Figure 6 A - A structure schematic diagram;

[0015] Figure 8 Schematic diagram of the heat collecting ring embedded in the induction coil of the present utility model.

[0016] In the figure, 1 is a support frame; 11 is a positioning groove; 12 is a hand - held handle; 13 is a support platform; 2 is a positioning boss; 3 is a fastening clip; 4 is a bolt; 5 is a heat collecting ring. Specific embodiments

[0017] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model is further described below.

[0018] As Figures 1 to 8 shown, an induction brazing heating auxiliary device for a titanium alloy conduit includes a support frame 1 for placing the conduit body, a positioning boss 2 provided on the support frame 1 for fixing the end, a fastening clip 3 for fastening the conduit body, and a heat collecting ring 5 that is adjusted by bending and then embedded in the induction coil. The induction coil needs to be adjusted by bending and then embedded therein, and the heat collecting ring is fixed to the induction coil in the form of flame brazing spot welding.

[0019] The support frame 1 is divided into three parts. The upper part has a positioning groove 11, the middle part is a hand - held handle 12 pre - treated by rolling, and the lower part is a support platform 13.

[0020] The positioning groove 11, the hand-held handle 12, and the support platform 13 are all made of low-carbon steel. After being welded together, their surfaces are galvanized to achieve good anti-corrosion performance, good weldability, strong portability, and good stability, meeting the requirements for use in a vacuum environment.

[0021] Figure 3 It is a cross-sectional view during induction heating and is used for the welding of titanium alloy ducts.

[0022] Figure 1 In the attached drawing, reference numeral a is the duct body, reference numeral b is the filler metal ring, and reference numeral c is the end.

[0023] The positioning boss 2 is made of a ceramic non-conductive material, ensuring the installation perpendicularity requirement, preventing the influence on the magnetic field of the induction coil, thus affecting the heating effect, and preventing the adhesion phenomenon between the end and the positioning boss 2 when heated.

[0024] During welding, it is necessary to separately perform local precise correction on the welding area and ensure that the relative positions of the duct and the end do not change. At this time, a portable device is required, which is convenient and lightweight. Considering the operating environment under vacuum, it is necessary to design an auxiliary device with appropriate dimensions. This device must be operable and convenient, meeting the real-time operation requirements of the operator, having good accessibility, achieving simple clamping, good end fitting, meeting the requirements of perpendicularity and assembly clearance, and having a good heat source gathering effect. More importantly, it solves the problem of the combination of the traditional heat source and this heating auxiliary device, that is, the overall induction heating equipment is combined with this newly designed auxiliary heating device, adopting a flame brazing connection structure form to solve the current problem of induction brazing of titanium alloy ducts; for the specific style of the heating auxiliary positioning integrated device, see Figures 4 - 7 。

[0025] The fastening clip 3 is made of pure copper material to prevent damage to the titanium alloy tube body during the fastening process.

[0026] The fastening clip 3 is provided with a bolt 4 for adjusting the assembly clearance through fine adjustment.

[0027] The heat-gathering ring 5 is made of red copper material and is stratified with stepped grooves. The welding part of the workpiece to be welded is placed in an alternating magnetic field, and the method of local heating is realized through the induced current of the heat-gathering ring 5. Using the induction coil as the heat source to melt the filler metal ring to achieve the purpose of welding, realizing the visualization and precise quality repair of titanium alloy ducts under a pure argon gas environment, and solving the current problem of welding titanium alloy ducts.

[0028] A method for using a heating auxiliary device for induction brazing of titanium alloy ducts is as follows:

[0029] S1. Placement: Place the titanium alloy end on the positioning boss 2 to ensure the perpendicularity of the end;

[0030] S2. Adjust the gap: Insert the catheter body into the upper positioning groove of the support frame 1. Through the bolt 4, insert the solder ring outside the lower end of the catheter body, adjust the relative gap between the catheter body and the end, and connect the fastening clip 3 to the support frame 1 to fix the catheter body;

[0031] S3. Heat concentration: Embed the heat-concentrating ring 5 in the induction coil to concentrate the induction magnetic field during welding, so as to achieve the heat-concentrating effect at the welding point. By holding the handle in the middle of the support frame 1, change the relative position between the induction coil and the welding point, and adjust the welding state in a timely manner;

[0032] S4. Welding: Turn on the welding power supply. During the welding process, the device moves synchronously with the formation of the weld seam. By adjusting this auxiliary heating integrated device, the welding work of the workpiece in a vacuum environment is finally realized.

[0033] During the welding process, the heating device heats and melts the solder ring through the induction coil, so as to weld the catheter body and the end. With the auxiliary heating of the heat-concentrating ring 5, the heating heat is more concentrated. At the same time, the relative position between the induction coil and the catheter welding point can be adjusted by holding the support frame 1, so as to realize the fine adjustment of the welding heat energy distribution, and eliminate the problems of the change of the end perpendicularity and the assembly gap caused by the change of the relative position; the device is flexible and convenient to use, and can perfectly avoid the problems of large quality fluctuations caused by the fitting gap, perpendicularity and heat source problems during the induction brazing of titanium alloy catheters. It has strong operability and high work efficiency, can be used to realize the welding process, and improve the welding quality.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An induction brazing heating auxiliary device for a titanium alloy conduit, characterized in that: It includes a support frame (1) for inserting a catheter tube body, a positioning boss (2) arranged on the support frame (1) for fixing the end, a fastening clip (3) for fastening the catheter tube body, and a heat accumulation ring (5) which adjusts the induction coil after bending and is embedded therein.

2. The induction brazing heating auxiliary device for a titanium alloy conduit according to claim 1, characterized in that: The support frame (1) is divided into three parts. The upper part has a positioning groove (11), the middle part is a hand-held handle (12) pre-treated by rolling, and the lower part is a support platform (13).

3. An induction brazing heating auxiliary device for a titanium alloy conduit according to claim 2, characterized in that: The positioning groove (11), the hand-held handle (12), and the support platform (13) are all made of low-carbon steel and are galvanized on the surface after being welded together.

4. An induction brazing heating auxiliary device for a titanium alloy conduit according to claim 1, characterized in that: The positioning boss (2) is made of a ceramic non-conductive material.

5. The induction brazing heating auxiliary device for a titanium alloy conduit according to claim 1, characterized in that: The fastening clip (3) is made of pure copper material.

6. The induction brazing heating auxiliary device for a titanium alloy conduit according to claim 1, wherein: A bolt (4) for adjusting the assembly gap by fine adjustment is arranged on the fastening clip (3).

7. An induction brazing heating auxiliary device for a titanium alloy conduit according to claim 1, wherein: The heat accumulation ring (5) is made of red copper material and is stratified by stepped grooves.

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