A brazing filler metal prepositioning tool and method for annular conical metal honeycomb

Abstract

The application discloses a brazing filler metal pre-setting tool and method for annular conical metal honeycomb, and the upper roller and the lower roller are matched to clamp the annular conical metal honeycomb to be machined and the brazing filler metal, the extrusion is realized through the rotation of the lower roller, and the upper roller adjusting mechanism is arranged, the upper roller adjusting mechanism can adjust the inclination angle of the upper roller, the inclination angle of the upper roller is adjusted according to the angle of the outer conical angle of the annular conical metal honeycomb, the stability of machining is improved, the extrusion force received by the brazing filler metal during machining is uniform through the clamping of the upper roller and the lower roller, the brazing filler metal is prevented from falling off when the honeycomb and the base are assembled, reliable extrusion of the brazing filler metal is realized, and the brazing filler metal exists in each core cell of the bevel honeycomb, and the pre-setting tool disclosed by the application replaces manual operation and has higher machining efficiency.

Description

Technical Field

[0001] This invention belongs to the field of metal honeycomb processing and relates to a brazing filler metal honeycomb pre-positioning tooling and method. Background Technology

[0002] Honeycomb seals not only have excellent sealing properties but also good dynamic characteristics. With continuous improvements in the processing and welding technology of honeycomb core cells, the cost of honeycomb sealing technology is constantly decreasing. Honeycomb sealing structure parts have been widely used in engines, and the structural changes of honeycomb parts are becoming increasingly complex, with the emergence of annular conical honeycomb surface structures. Vacuum brazing of such honeycomb parts is currently rare in China. The pre-placement of brazing filler metal before vacuum brazing is done using a "rolling pin" manual extrusion method, that is, using a cylindrical plastic rod to repeatedly roll the adhesive brazing filler metal into the core cells of the metal honeycomb to achieve the purpose of pre-placement. However, this method requires 2-3 people to operate simultaneously, and it takes 4-6 hours to complete the pre-placement of brazing filler metal for one annular conical metal honeycomb. It is time-consuming, labor-intensive, and has extremely low processing efficiency. Furthermore, the adhesive brazing filler metal extruded into the honeycomb in this way is easily detached when assembling the honeycomb and the base due to uneven force during extrusion. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of manual processing in the prior art, which is time-consuming, labor-intensive, and inefficient. In addition, manual operation causes uneven stress on the adhesive brazing filler metal during extrusion, making it easy for the filler metal to fall off when assembling the honeycomb and the base. This invention provides a pre-positioning tool and method for brazing filler metal in annular conical metal honeycomb.

[0004] To achieve the above objectives, the present invention employs the following technical solution: A pre-setting tool for brazing filler metal in an annular conical surface includes an extrusion body, an upper roller adjusting mechanism on the extrusion body, an upper roller at the end of the upper roller adjusting mechanism, and a lower roller below the upper roller, the lower roller being circumferentially rotatable. The upper roller adjustment mechanism can adjust the tilt angle of the upper roller, and the upper roller adjustment mechanism can drive the upper roller to move up and down; When the brazing filler metal is pre-placed, the annular conical metal honeycomb to be processed is placed on the lower roller, and the pre-placed brazing filler metal is clamped between the upper roller and the annular conical metal honeycomb to be processed.

[0005] A further improvement of the present invention is that: The upper roller mechanism includes a first mounting frame, in which a roller mounting frame is disposed. The roller mounting frame is rotatably connected to the side wall of the first mounting frame. An upper roller is disposed at the lower end of the roller mounting frame. The first mounting frame is connected to a driving component, which can drive the first mounting frame to move up and down. An angle adjustment groove is provided on the side wall of the first mounting bracket, and an adjustment positioning rod is provided on the side wall of the roller mounting bracket. The adjustment positioning rod passes through the angle adjustment groove, and a positioning ring is provided at the end of the adjustment positioning rod away from the roller mounting bracket. When the positioning ring is rotated, the positioning ring can move along the axial direction of the adjustment positioning rod. When positioned, the end face of the positioning ring near the first mounting bracket abuts against the side wall of the first mounting bracket. The roller mounting bracket is provided with a positioning part, and an angle pad is provided between the positioning part and the lower end face of the first mounting bracket.

[0006] The vertical height at both ends of the angle adjustment groove is greater than the vertical height at the middle.

[0007] The two ends of the angle adjustment groove are smoothly connected.

[0008] The roller mounting bracket is connected to the adjusting shaft, and the adjusting shaft is rotatably connected to the side wall of the first mounting bracket.

[0009] The first mounting bracket is connected to the second mounting bracket, and the second mounting bracket is connected to the extrusion body; The drive unit is mounted on the second mounting bracket.

[0010] The extrusion body is equipped with a roller, and the lower roller is mounted on the roller. The roller can drive the lower roller to rotate circumferentially.

[0011] A method for pre-applying brazing filler metal to an annular conical metal honeycomb structure includes the following steps: The tilt angle of the upper roller can be adjusted by the roller adjustment mechanism; The annular conical metal honeycomb to be processed is placed on the lower roller. The pre-placed brazing filler metal is placed between the upper roller and the annular conical metal honeycomb to be processed. The upper roller is moved downward through the roller adjustment mechanism until the upper roller and the lower roller cooperate to clamp the pre-placed brazing filler metal and the annular conical metal honeycomb. As the lower roller rotates, the pre-placed brazing filler metal and the annular conical metal honeycomb rotate synchronously. During rotation, the pre-placed brazing filler metal is squeezed into the annular conical metal honeycomb.

[0012] The pre-set brazing filler metal is provided in N quantities, and the sum of the lengths of the N pre-set brazing filler metals is equal to the perimeter of the annular conical metal honeycomb.

[0013] During extrusion, the brazing filler metal is preheated to a temperature of 150℃-200℃.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a pre-positioning fixture for brazing filler metal in annular conical metal honeycomb. An upper roller and a lower roller work together to clamp the annular conical metal honeycomb and brazing filler metal to be processed. The lower roller rotates to compress the filler metal. An upper roller adjustment mechanism is provided to adjust the tilt angle of the upper roller according to the angle of the outer cone angle of the annular conical metal honeycomb, improving processing stability. The clamping action of the upper and lower rollers ensures uniform compressive force on the brazing filler metal during processing. When assembling the honeycomb and base, the brazing filler metal is prevented from falling off, ensuring reliable compression of the brazing filler metal and guaranteeing that each cell of the inclined honeycomb contains brazing filler metal. This pre-positioning fixture replaces manual operation, resulting in higher processing efficiency.

[0015] Furthermore, in this invention, an angle adjustment groove is provided on the side wall of the first mounting bracket. When adjusting the angle of the upper roller, the adjusting positioning rod can move synchronously along the angle adjustment groove and fix the angle by cooperating with the positioning ring, ensuring the stability of the angle fixation during processing. At the same time, a positioning part is provided on the roller mounting bracket, and an angle pad is provided between the positioning part and the lower end face of the first mounting bracket to support the lower roller and ensure the stability of the angle fixation.

[0016] Furthermore, in this invention, the vertical height of the two ends of the angle adjustment groove is greater than the vertical height of the middle part, which, together with the adjustment positioning rod, enables the adjustment of different angles without causing interference.

[0017] Furthermore, in this invention, the brazing filler metal is preheated during extrusion, which enables reliable extrusion of the adhesive brazing filler metal and ensures that each cell of the inclined honeycomb contains brazing filler metal. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a side view of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a schematic diagram of the annular conical metal honeycomb and adhesive brazing filler metal structure of the present invention; Figure 4 The three-dimensional representation of the present invention Figure 1 ; Figure 5 The three-dimensional representation of the present invention Figure 2 ; Figure 6 The three-dimensional representation of the present invention Figure 3 ; Figure 7 The three-dimensional representation of the present invention Figure 4 ; Figure 8 This is a schematic diagram of the method flow of the present invention.

[0020] Wherein: 1-Extrusion body; 2-Upper roller; 3-Lower roller; 4-Roller mounting bracket; 5-Angle adjustment groove; 6-Positioning ring; 7-First mounting bracket; 8-Positioning part; 9-Angle pad; 10-Drive component; 11-Second mounting bracket; 12-Adjusting shaft; 13-Pressing handwheel; 14-Drive rod; 15-Scale; 16-Handwheel; 17-Roller; 18-Adhesive brazing filler metal; 19-Annular conical metal honeycomb; 20-Mounting component. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings: See Figures 1 to 8 This invention discloses a solder pre-positioning tooling for annular conical metal honeycomb. By designing a reasonable processing technology and formulating an effective solder extrusion technology solution, the solder pre-positioning problem of annular conical metal honeycomb is solved, and the solder pre-positioning efficiency of annular conical metal honeycomb is improved.

[0028] Example 1 This embodiment discloses a solder pre-positioning fixture for annular conical metal honeycomb, including an extrusion body 1. An upper roller adjustment mechanism is provided on the extrusion body 1, an upper roller 2 is provided at the end of the upper roller adjustment mechanism, and a lower roller 3 is provided below the upper roller 2. The lower roller 3 is circumferentially rotatable. The upper roller adjustment mechanism can adjust the tilt angle of the upper roller 2 and can drive the upper roller 2 to move up and down. During solder pre-positioning, the annular conical metal honeycomb to be processed is sleeved on the lower roller 3, and the solder to be pre-positioned is clamped between the upper roller 2 and the annular conical metal honeycomb to be processed.

[0029] Furthermore, in this embodiment, the specific structure of the upper roller mechanism is as follows: The upper roller mechanism includes a first mounting frame 7, a roller mounting frame 4 is disposed inside the first mounting frame 7, the roller mounting frame 4 is rotatably connected to the side wall of the first mounting frame 7, the upper roller 2 is disposed at the lower end of the roller mounting frame 4, the first mounting frame 7 is connected to a driving member 10, and the driving member 10 can drive the first mounting frame 7 to move up and down; Furthermore, an angle adjustment groove 5 is formed on the side wall of the first mounting bracket 7, and an adjustment positioning rod is provided on the side wall of the roller mounting bracket 4. The adjustment positioning rod passes through the angle adjustment groove 5, and a positioning ring 6 is provided at the end of the adjustment positioning rod away from the roller mounting bracket 4. When the positioning ring 6 is rotated, the positioning ring 6 can move axially along the adjustment positioning rod. During positioning, the end face of the positioning ring 6 near the first mounting bracket 7 abuts against the side wall of the first mounting bracket 7. The positioning ring 6 is threadedly connected to the adjustment positioning rod. Rotating the positioning ring 6 causes the positioning ring 6 to move axially along the adjustment positioning rod. Furthermore, a positioning part 8 is provided on the roller mounting bracket 4, and an angle pad 9 is provided between the positioning part 8 and the lower end face of the first mounting bracket 7.

[0030] Furthermore, the vertical height of the two ends of the angle adjustment groove 5 is greater than the vertical height of the middle part, and the two ends of the angle adjustment groove 5 are smoothly connected. Two angle adjustment grooves 5 are symmetrically provided. The curvature of the angle adjustment groove 5 is adjusted according to the range of the outer cone angle of the annular conical metal honeycomb to be processed. In this embodiment, the angle adjustment groove 5 is suitable for the pre-processing of brazing filler metal for annular conical metal honeycomb with an outer cone angle of 0°-35°. By adjusting the curvature of the angle adjustment groove 5, it can also be extended to the pre-processing of brazing filler metal for annular conical metal honeycomb with a larger cone angle. When adjusting the angle of the upper roller, the adjusting positioning rod can move synchronously along the angle adjustment groove, and the angle is fixed by cooperating with the positioning ring, ensuring the stability of the angle fixation during processing. At the same time, a positioning part is provided on the roller mounting bracket, and an angle pad is provided between the positioning part and the lower end face of the first mounting bracket to support the lower roller and ensure the stability of the angle fixation.

[0031] Furthermore, the roller mounting bracket 4 is connected to the adjusting shaft 12, which is rotatably connected to the side wall of the first mounting bracket 7. When the adjusting shaft 12 rotates, it drives the roller mounting bracket 4, thereby further realizing the rotation of the upper roller 2.

[0032] Furthermore, the first mounting bracket 7 is connected to the second mounting bracket 11, and the second mounting bracket 11 is connected to the extrusion body 1; the driving component 10 is disposed on the second mounting bracket 11. Specifically, the second mounting bracket 11 is installed on the side of the extrusion body 1, and the driving component 10 penetrates the upper end face of the second mounting bracket 11. Specifically, the driving component 10 includes a driving rod 14, a lower pressure handwheel 13 is sleeved near the upper end of the driving rod 14, a scale 15 is engraved on the outer end face of the rotating lower pressure handwheel 13, a connecting hole is opened on the upper end face of the second mounting bracket 11, an installation component 20 is disposed in the connecting hole, the driving rod 14 penetrates the installation component 20, the driving rod 14 is threadedly connected to the installation component 20, and the lower end of the driving rod 14 is connected to the first mounting bracket 7.

[0033] When adjusting the up and down position of the upper roller 2, rotate the lower handwheel 13. The lower handwheel 13 synchronously drives the drive rod 14 to rotate, moving up and down along the inside of the mounting part 20, thereby driving the first mounting bracket 7 to move up and down.

[0034] Furthermore, a roller 17 is provided on the extrusion body 1, and the lower roller 3 is provided on the roller. The roller can drive the lower roller 3 to rotate circumferentially. The roller 17 passes through the extrusion body 1 in the horizontal direction, and a handwheel 16 is provided at the end of the roller 17 away from the extrusion body 1.

[0035] Furthermore, in this embodiment, several stepped surfaces are axially arranged on the outer side wall of the lower roller 3. Each stepped surface has a different diameter to accommodate different specifications of annular conical metal honeycomb. During processing, the side wall of the stepped surface can play a certain limiting role to prevent the annular conical metal honeycomb and brazing filler metal from sliding under the pressure of force.

[0036] Furthermore, in this embodiment, the external structure of the lower roller 3 can be adjusted and replaced according to different processing objects.

[0037] This invention provides a method for pre-placing brazing filler metal in annular conical metal honeycomb structures, and the designed and manufactured brazing filler metal extruder solves the problem of low brazing filler metal pre-placing efficiency in annular conical metal honeycomb structures.

[0038] Example 2 For pre-filling the brazing filler metal in annular conical metal honeycomb (outer cone angle 0°-35°), the steps are as follows: Step 1: Cleaning the annular conical metal honeycomb The annular conical metal honeycomb is ultrasonically cleaned, and then the brazing area of ​​the part is cleaned with chemically pure or industrially pure acetone or alcohol. After cleaning, it is air-dried.

[0039] Step 2: Adjust the angle of the upper roller of the brazing filler extruder. To match the angle of the annular conical metal honeycomb, such as Figure 1-2 As shown, after rotating the positioning ring 6 of the brazing extruder, the upper roller 2 of the brazing extruder is adjusted to the required angle. The angle pad 9 is inserted between the positioning part 8 and the first mounting bracket 7 to fix the angle. The positioning ring 6 is rotated clockwise to press the positioning ring 6 against the side wall of the first mounting bracket 7, thereby fixing the angle position.

[0040] Step 3: Prepare the solder The ordered rectangular solder blocks are prepared as adhesive solder with the following specifications: length is 1 / 8 of the perimeter of the annular conical metal honeycomb, and width is equal to the honeycomb width.

[0041] Step 4: Apply adhesive On the side of the adhesive tape 18 that is in contact with the honeycomb, use a brush to evenly apply a layer of the prepared adhesive (prepare and weigh 70 grams of polystyrene, then pour it into 500 ml of trichloroethylene and stir it repeatedly until it is evenly mixed, and let it stand for about 96 hours before use). The adhesive tape after brushing should be squeezed into the honeycomb core within 10 minutes.

[0042] Step 5: Preparation of extruded brazing filler metal The annular conical metal honeycomb 19 is looped onto the lower roller 3 of the extruder. The adhesive side of the adhesive strip 18 faces the annular conical metal honeycomb, while the other side of the adhesive strip 18 faces the upper roller 2. The starting part (about 20mm) is attached to the outer surface of the honeycomb. Step 6: Extruding the brazing filler metal Rotate the lower handwheel 13 clockwise to move the upper roller 2 downwards. After the upper roller 2 contacts the adhesive brazing filler metal 18, continue to rotate the lower handwheel 13 clockwise, advancing 1-2 increments along the scale 15 to ensure that the upper roller 2 has a certain clamping force with the annular conical metal honeycomb 19. Then, rotate the handwheel 16 clockwise evenly, while ensuring that the adhesive brazing filler metal 18 is in a straightened state. The upper roller 2 of the brazing filler extruder presses 1 / 8 of the honeycomb circumference of the adhesive brazing filler metal into the honeycomb. Then, rotate the handwheel 16 counterclockwise evenly to extrude to the starting position of the adhesive brazing filler metal. This completes the first extrusion process of the adhesive brazing filler metal 18. Repeat the first extrusion process 1-2 times to complete the extrusion of 1 / 8 of the honeycomb circumference of the adhesive brazing filler metal. During the extrusion process, preheating with an electric hair dryer is used. The heating temperature is about 150℃-200℃, that is, the adhesive brazing filler metal 18 is preheated first, and then the adhesive brazing filler metal 18 is extruded.

[0043] Step 7: Repeat squeezing Repeat steps 3-6 to complete the extrusion process of the entire ring in 8 segments. During extrusion, ensure that the front end of each segment matches the tail end of the previous segment to ensure that no honeycomb core is missed when the brazing filler is pre-placed.

[0044] Step 8: Remove excess solder and oxide scale from the honeycomb surface to be soldered. After extrusion, the surface of the honeycomb ring extrusion filler material needs to be scraped with a hand knife to remove excess filler material that has not been pressed into the honeycomb core on the honeycomb surface until the honeycomb surface reveals a fresh metallic luster.

[0045] Step 9: Check the quality of the pre-placed solder. Use a flashlight to check the pre-placed brazing filler on the annular conical metal honeycomb surface to be welded, and observe whether each honeycomb cell on the surface to be welded has brazing filler.

[0046] It should be noted that when the outer cone angle of the annular conical metal honeycomb changes from 0° to 35°, it is only necessary to adjust the angle of the upper roller of the brazing filler extruder in step 1 and repeat steps 2 to 7.

[0047] Example 3 Step 1: Cleaning the annular conical metal honeycomb The annular conical metal honeycomb, i.e., the outer sealing ring honeycomb 1, is ultrasonically cleaned. Then, the parts to be brazed are cleaned with chemically pure or industrially pure acetone or alcohol, and then air-dried.

[0048] Step 2: Adjust the angle of the upper roller of the brazing filler extruder. To match the angle of the annular conical metal honeycomb, i.e. the outer sealing ring honeycomb, after rotating the positioning ring 6 of the brazing extruder, the upper roller 2 of the brazing extruder is adjusted to 27°. The angle pad 9 is inserted between the positioning part 8 and the first mounting bracket 7 to fix the angle. The positioning ring 6 is rotated clockwise to press the positioning ring 6 against the side wall of the first mounting bracket 7, thereby fixing the angle position.

[0049] Step 3: Prepare the solder The ordered rectangular solder block is prepared as adhesive solder with the following specifications: the length is 1 / 8 of the outer sealing ring honeycomb circumference of 567mm, approximately 71mm in length, and the width is the same as the honeycomb, approximately 15mm.

[0050] Step 4: Apply adhesive On the side of the bonding tape that contacts the outer sealing ring honeycomb, use a brush to evenly apply a layer of the prepared adhesive (prepare and weigh 70 grams of polystyrene, then pour it into 500 ml of trichloroethylene and stir repeatedly until homogeneous, and let it stand for about 96 hours before use). The applied bonding tape should be squeezed into the core of the outer sealing ring honeycomb within 10 minutes.

[0051] Step 5: Preparation of extruded brazing filler metal The annular conical metal honeycomb 19 is looped onto the lower roller 3 of the extruder. The adhesive side of the adhesive strip 18 faces the annular conical metal honeycomb, while the other side of the adhesive strip 18 faces the upper roller 2. The starting part (about 20mm) is attached to the outer surface of the honeycomb. Step 6: Extruding the brazing filler metal Rotate the lower handwheel 13 clockwise to move the upper roller 2 downwards. After the upper roller 2 contacts the adhesive brazing filler metal 18, continue to rotate the lower handwheel 13 clockwise, advancing 1-2 increments along the scale 15 to ensure that the upper roller 2 has a certain clamping force with the annular conical metal honeycomb 19. Then, rotate the handwheel 16 clockwise evenly, while ensuring that the adhesive brazing filler metal 18 is in a straightened state. The upper roller 2 of the brazing filler extruder presses 1 / 8 of the honeycomb circumference of the adhesive brazing filler metal into the honeycomb. Then, rotate the handwheel 16 counterclockwise evenly to extrude to the starting position of the adhesive brazing filler metal. This completes the first extrusion process of the adhesive brazing filler metal 18. Repeat the first extrusion process 1-2 times to complete the extrusion of 1 / 8 of the honeycomb circumference of the adhesive brazing filler metal. During the extrusion process, preheating with an electric hair dryer is used. The heating temperature is about 150℃, that is, the adhesive brazing filler metal 18 is preheated first, and then the adhesive brazing filler metal 18 is extruded.

[0052] Step 7: Repeat squeezing Repeat steps 3-6 to complete the extrusion process of the entire ring in 8 segments. During extrusion, ensure that the front end of each segment matches the tail end of the previous segment to ensure that no honeycomb core is missed when the brazing filler is pre-placed.

[0053] Step 8: Remove excess solder and oxide scale from the honeycomb surface to be soldered. After extrusion, the surface of the honeycomb ring extrusion filler material needs to be scraped with a hand knife to remove excess filler material that has not been pressed into the honeycomb core on the honeycomb surface until the honeycomb surface reveals a fresh metallic luster.

[0054] Step 9: Check the quality of the pre-placed solder. Use a flashlight to check the pre-placed brazing filler on the annular conical metal honeycomb surface to be welded, and observe whether each honeycomb cell on the surface to be welded has brazing filler.

[0055] Example 4 Step 1: Clean the annular metal honeycomb The annular straight-face + conical metal honeycomb, i.e., the outer sealing ring honeycomb 2, is ultrasonically cleaned. Then, the parts to be brazed are cleaned with chemically pure or industrially pure acetone or alcohol, and then air-dried.

[0056] Step 2: Adjust the angle of the upper roller of the brazing filler extruder. To match the angle of the annular conical metal honeycomb, i.e. the outer sealing ring honeycomb, after rotating the positioning ring 6 of the brazing extruder, the upper roller 2 of the brazing extruder is adjusted to 0°. The angle pad 9 is inserted between the positioning part 8 and the first mounting bracket 7 to fix the angle. The positioning ring 6 is rotated clockwise to press the positioning ring 6 against the side wall of the first mounting bracket 7, thereby fixing the angle position.

[0057] Step 3: Prepare the solder The ordered rectangular solder block is prepared as adhesive solder with the following specifications: the length is 1 / 8 of the circumference of the outer sealing ring honeycomb (595mm), approximately 75mm in length, and the width is the same as the honeycomb, approximately 9mm.

[0058] Step 4: Apply adhesive On the side where the adhesive brazing filler metal and the outer sealing ring honeycomb 1 are in contact, use a brush to evenly apply a layer of the prepared adhesive (prepare and weigh 70 grams of polystyrene, then pour it into 500 ml of trichloroethylene and stir it repeatedly until it is evenly mixed, and let it stand for about 96 hours before use). The adhesive brazing filler metal after brushing should be squeezed into the core of the outer sealing ring honeycomb 2 within 10 minutes.

[0059] Step 5: Preparation of extruded brazing filler metal The annular conical metal honeycomb 19 is looped onto the lower roller 3 of the extruder. The adhesive side of the adhesive strip 18 faces the annular conical metal honeycomb, while the other side of the adhesive strip 18 faces the upper roller 2. The starting part (about 20mm) is attached to the outer surface of the honeycomb. Step 6: Extruding the brazing filler metal Rotate the lower handwheel 13 clockwise to move the upper roller 2 downwards. After the upper roller 2 contacts the adhesive brazing filler metal 18, continue to rotate the lower handwheel 13 clockwise, advancing 1-2 increments along the scale 15 to ensure that the upper roller 2 has a certain clamping force with the annular conical metal honeycomb 19. Then, rotate the handwheel 16 clockwise evenly, while ensuring that the adhesive brazing filler metal 18 is in a straightened state. The upper roller 2 of the brazing filler extruder presses 1 / 8 of the honeycomb circumference of the adhesive brazing filler metal into the honeycomb. Then, rotate the handwheel 16 counterclockwise evenly to extrude to the starting position of the adhesive brazing filler metal. This completes the first extrusion process of the adhesive brazing filler metal 18. Repeat the first extrusion process 1-2 times to complete the extrusion of 1 / 8 of the honeycomb circumference of the adhesive brazing filler metal. During the extrusion process, preheating with an electric hair dryer is used. The heating temperature is about 200℃, that is, the adhesive brazing filler metal 18 is preheated first, and then the adhesive brazing filler metal 18 is extruded.

[0060] Step 7: Repeat squeezing Repeat steps 3-6 to complete the extrusion process of the entire ring in 8 segments. During extrusion, ensure that the front end of each segment matches the tail end of the previous segment to ensure that no honeycomb core is missed when the brazing filler is pre-placed.

[0061] Step 8: Remove excess solder and oxide scale from the honeycomb surface to be soldered. After extrusion, the surface of the honeycomb ring extrusion filler material needs to be scraped with a hand knife to remove excess filler material that has not been pressed into the honeycomb core on the honeycomb surface until the honeycomb surface reveals a fresh metallic luster.

[0062] Step 9: Check the quality of the pre-placed solder. Use a flashlight to inspect the pre-placed brazing filler on the outer sealing ring honeycomb 2 surface to be welded, and observe whether each honeycomb cell on the surface to be welded has brazing filler.

[0063] To verify the effectiveness of the present invention, an experiment was conducted using a certain annular conical metal honeycomb specimen. The specific process is as follows: Test equipment: Brazing filler metal extrusion press; Experimental procedure: Follow steps 1-9 of the annular conical metal honeycomb brazing filler metal extrusion scheme, such as... Figure 4 As shown.

[0064] Verification scheme: see Table 1.

[0065]

[0066] The test results show that by implementing the annular conical metal honeycomb brazing filler metal extrusion scheme, manpower is saved. The brazing filler metal pre-placement process using the brazing filler metal extrusion machine only requires one person to operate, reducing the number of processing personnel from 2-3 to 1 person. The brazing filler metal pre-placement time for completing one annular conical metal honeycomb is reduced from 4-6 hours to 0.8 hours.

[0067] This invention provides an operation method of applying adhesive to the brazing filler metal, hot blowing, and extrusion when pre-applying brazing filler metal to annular conical metal honeycomb. This method achieves reliable extrusion of the brazing filler metal and ensures that each cell of the inclined honeycomb contains brazing filler metal.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pre-positioning tooling for brazing filler metal in a ring-shaped conical surface, characterized in that, It includes an extrusion body (1), an upper roller adjustment mechanism is provided on the extrusion body (1), an upper roller (2) is provided at the end of the upper roller adjustment mechanism, a lower roller (3) is provided below the upper roller (2), and the lower roller (3) can rotate circumferentially; The upper roller adjustment mechanism can adjust the tilt angle of the upper roller (2), and the upper roller adjustment mechanism can drive the upper roller (2) to move up and down; When the brazing filler metal is pre-placed, the annular conical metal honeycomb to be processed is placed on the lower roller (3), and the pre-placed brazing filler metal is clamped between the upper roller (2) and the annular conical metal honeycomb to be processed. The upper roller adjustment mechanism includes a first mounting frame (7), a roller mounting frame (4) is provided inside the first mounting frame (7), the roller mounting frame (4) is rotatably connected to the side wall of the first mounting frame (7), the upper roller (2) is provided at the lower end of the roller mounting frame (4), the first mounting frame (7) is connected to a driving member (10), and the driving member (10) can drive the first mounting frame (7) to move up and down; An angle adjustment groove (5) is provided on the side wall of the first mounting bracket (7), and an adjustment positioning rod is provided on the side wall of the roller mounting bracket (4). The adjustment positioning rod passes through the angle adjustment groove (5), and a positioning ring (6) is provided at the end of the adjustment positioning rod away from the roller mounting bracket (4). When the positioning ring (6) is rotated, the positioning ring (6) can move along the axial direction of the adjustment positioning rod. When positioning, the end face of the positioning ring (6) close to the first mounting bracket (7) abuts against the side wall of the first mounting bracket (7). The roller mounting bracket (4) is provided with a positioning part (8), and an angle pad (9) is provided between the positioning part (8) and the lower end face of the first mounting bracket (7). The roller mounting bracket (4) is connected to the adjusting shaft (12), and the adjusting shaft (12) is rotatably connected to the side wall of the first mounting bracket (7).

2. The brazing filler metal pre-positioning fixture for annular conical metal honeycomb according to claim 1, characterized in that, The vertical height of the two ends of the angle adjustment groove (5) is greater than the vertical height of the middle part.

3. The brazing filler metal pre-positioning fixture for annular conical metal honeycomb according to claim 2, characterized in that, The two ends of the angle adjustment groove (5) are smoothly connected.

4. The brazing filler metal pre-positioning fixture for annular conical metal honeycomb according to claim 1, characterized in that, The first mounting bracket (7) is connected to the second mounting bracket (11), and the second mounting bracket (11) is connected to the extrusion body (1). The drive unit (10) is mounted on the second mounting bracket (11).

5. The brazing filler metal pre-positioning fixture for annular conical metal honeycomb according to claim 1, characterized in that, The extrusion body (1) is provided with a roller, and the lower roller (3) is provided on the roller. The roller can drive the lower roller (3) to rotate circumferentially.

6. A method for pre-setting the brazing filler metal in an annular conical metal honeycomb based on the brazing filler metal pre-setting fixture of claim 1, characterized in that, Includes the following steps: The tilt angle of the upper roller (2) is adjusted by the upper roller adjustment mechanism; The annular conical metal honeycomb to be processed is placed on the lower roller (3), and the pre-placed brazing filler metal is placed between the upper roller (2) and the annular conical metal honeycomb to be processed. The upper roller (2) is moved downward through the upper roller adjustment mechanism until the upper roller (2) and the lower roller (3) cooperate to clamp the pre-placed brazing filler metal and the annular conical metal honeycomb. Rotate the lower roller (3), and the pre-placed brazing filler metal and the annular conical metal honeycomb rotate synchronously. During the rotation, the pre-placed brazing filler metal is squeezed into the annular conical metal honeycomb.

7. The method for pre-placing brazing filler metal in an annular conical metal honeycomb according to claim 6, characterized in that, The pre-set brazing filler metal is provided in N quantities, and the sum of the lengths of the N pre-set brazing filler metals is equal to the perimeter of the annular conical metal honeycomb.

8. The method for pre-placing brazing filler metal in an annular conical metal honeycomb according to claim 6, characterized in that, During extrusion, the brazing filler metal is preheated to a temperature of 150℃-200℃.

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