Thin-wall wave lobe mixer high-temperature brazing anti-deformation clamping tool
Patent Information
- Application Number
- CN202522550806.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-01
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-01
AI Technical Summary
Existing thin-walled beam mixers are prone to deformation during high-temperature brazing, and the processing steps are complex, resulting in high power consumption, large carbon emissions, and low efficiency.
A high-temperature brazing anti-deformation clamping fixture for a thin-walled lobe mixer is designed. It is made of graphite material and includes a base, a support ring, a positioning ring, a support component, and a positioning component. After positioning and clamping the parts, it is brazed at high temperature in one go to eliminate stress, eliminating the need for secondary furnace feeding and shape correction.
It simplifies the processing steps, reduces electricity consumption and carbon emissions, improves processing efficiency, ensures the welding quality and coaxiality of parts, and avoids deformation problems.
Smart Images
Figure CN224927155U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of parts welding technology, and in particular to a deformation-resistant clamping fixture for high-temperature brazing of a thin-walled beam mixer between 1000°C and 1100°C. Background Technology
[0002] like Figure 1 and Figure 2 The illustrated beam mixer requires welding its various components during manufacturing. The beam mixer includes beams, a flange below the beam, a central cone at the bottom of the flange, a load-bearing ring at the bottom edge of the flange, an upper mounting ring on the outer periphery of the beam, and a lower mounting ring below the upper mounting ring. The lower mounting ring is connected to the flange via several circumferentially distributed connecting plates, and a raised ring at the bottom end of the lower mounting ring. These components are connected and fixed by argon arc welding, followed by stress relief and shape adjustment.
[0003] The bearing housing is then installed at the center of the bottom of the central cone. One end of the oil supply pipe and the return pipe are connected to the bearing housing, and the other end extends through the flange and the lower mounting ring. The extended ends of the oil supply pipe and the return pipe are connected to pipe fittings. These components then need to be connected by high-temperature brazing, followed by secondary shaping. The entire processing of the lobe mixer requires two furnace feeds (one for stress relief and one for high-temperature brazing) and two shaping processes. To address this, a high-temperature brazing anti-deformation clamping fixture for thin-walled lobe mixers is designed to simplify the processing steps and improve processing efficiency while ensuring the brazing quality of the lobe mixer. Utility Model Content
[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a high-temperature brazing anti-deformation clamping fixture for thin-walled lobe mixers. While ensuring the forming quality of the lobe mixer, it combines two furnace feeds into one, saving electricity, reducing carbon emissions, simplifying the processing steps, and improving processing efficiency.
[0005] This utility model provides a high-temperature brazing anti-deformation clamping fixture for a thin-walled beam mixer, comprising: The base has a groove on its top surface and an annular groove distributed coaxially around the groove. A positioning post is integrally formed in the groove. The outer diameter of the positioning post is clearance-fitted with the inner diameter of the bearing seat of the beam mixer. The inner diameter of the annular groove is clearance-fitted with the inner diameter of the convex ring of the beam mixer. A support ring, integrally formed, is disposed on the top surface of the base and coaxially distributed on the outer periphery of the groove. The top contour of the support ring matches the top contour inside the central cone of the beam mixer. A positioning ring is disposed above the base, and its inner diameter is in clearance fit with the outer diameter of the top of the lobe of the lobe mixer. A support component is disposed between the base and the positioning ring to provide positioning support for the positioning ring, making it coaxial with the groove; A positioning component is fixedly mounted on the top surface of the base, located on the outside of the annular groove, and is used to position the pipe joint of the beam mixer; The base, support ring, positioning ring, support assembly, and positioning assembly are all made of graphite material.
[0006] Furthermore, a gap is reserved between the inner diameter of the groove and the outer diameter of the bearing housing.
[0007] Furthermore, a gap is reserved between the outer diameter of the annular groove and the outer diameter of the convex ring.
[0008] Furthermore, the support assembly includes a plurality of support columns, which are evenly distributed circumferentially between the annular groove and the support ring. The bottom end of each support column is fixedly connected to the base, and a support platform is provided at its top end. The positioning ring has a first through hole corresponding to each support column, and the top end of each support column is inserted into the corresponding first through hole with a clearance fit.
[0009] Furthermore, the positioning component includes a support seat fixedly disposed on the top surface of the base located outside the annular groove. A second through hole is provided on the support seat along the radial direction of the annular groove. A positioning block passes through the second through hole with clearance fit. A positioning groove matching the contour of the pipe joint is provided at one end of the positioning block near the annular groove.
[0010] Furthermore, the base has several shaped holes.
[0011] Compared with the prior art, the beneficial effects of this utility model are: (1) When the clamping fixture of this utility model is used to position and clamp the bezel mixer, the components to be brazed are positioned and clamped by the base, support ring, positioning ring, support assembly and positioning assembly, and then sent into the high temperature furnace for high temperature brazing. At the same time, stress is eliminated, and the furnace entry process is eliminated. Under the constraint of the clamping fixture, no shape correction is required after high temperature brazing, thus eliminating the need for a shape correction process. The clamping fixture of this application combines two furnace entries into one furnace entry while ensuring the forming quality of the bezel mixer, saving electricity, reducing carbon emissions, simplifying the processing steps and improving processing efficiency. (2) The clamping fixture of this utility model is made of graphite material and has a reasonable structural design. It cleverly utilizes the characteristics of graphite material, such as low thermal expansion coefficient and certain strength at high temperature. It can control the deformation of thin-walled lobes mixer composed of multiple argon arc welds during high temperature period, and can also overcome the extrusion deformation of the lobes mixer caused by the thermal expansion of the material itself at high temperature, thus ensuring the welding quality of the parts. It also has reference value for the deformation control of thin-walled parts with complex structure and multiple welds in the process of stress relief at high temperature.
[0012] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description
[0013] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the beam mixer structure; Figure 2 A schematic diagram of the cross-sectional structure of a beam mixer; Figure 3 This is a structural diagram of the clamping fixture; Figure 4 A schematic diagram of the beam mixer mounted on a clamping fixture; Figure 5 This is a cross-sectional structural diagram of the beam mixer mounted on the clamping fixture.
[0014] The diagram shows: 1. Base; 2. Support ring; 3. Positioning ring; 4. Support assembly; 5. Positioning assembly; 6. Beam mixer. 11. Groove; 12. Annular groove; 13. Positioning pin; 14. Hole; 31. First through hole; 41. Support column; 42. Support platform; 51. Support base; 52. Second through hole; 53. Positioning block; 54. Positioning groove; 61. Beam; 62. Flange edge; 63. Center cone; 64. Bearing ring; 65. Upper mounting ring; 66. Lower mounting ring; 67. Connecting plate; 68. Raised ring; 69. Bearing housing; 610. Oil supply pipe; 611. Oil return pipe; 612. Pipe fitting. Detailed Implementation
[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.
[0016] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0017] Please refer to Figures 1-5 An embodiment of this utility model provides a high-temperature brazing anti-deformation clamping fixture for a thin-walled beam mixer, comprising: The base 1 has a groove 11 on its top surface and an annular groove 12 coaxially distributed around the outer periphery of the groove 11. A positioning post 13 is integrally formed in the groove 11. The outer diameter of the positioning post 13 is clearance-fitted with the inner diameter of the bearing seat 69 of the beam mixer 6. The inner diameter of the annular groove 12 is clearance-fitted with the inner diameter of the convex ring 68 of the beam mixer 6. The support ring 2 is integrally formed on the top surface of the base 1 and coaxially distributed on the outer periphery of the groove 12. The top contour of the support ring 2 matches the top contour inside the central cone 63 of the beam mixer 6. Positioning ring 3 is located above base 1, and its inner diameter is in clearance fit with the outer diameter of the top of the lobe 61 of the lobe mixer 6. Support component 4 is disposed between base 1 and positioning ring 3, and is used to position and support positioning ring 3 so that it is coaxial with the groove; The positioning component 5 is fixedly installed on the top surface of the base 1, located on the outside of the annular groove 12, and is used to position the pipe joint 612 of the beam mixer 6. Among them, the base 1, support 2, positioning ring 3, support component 4 and positioning component 5 are all made of graphite material.
[0018] In this embodiment, before using the clamping fixture, a flow-blocking agent (Al2O3) is applied or sprayed onto the positioning surface that contacts the beam mixer 6. This can effectively prevent the beam mixer 6 from sticking to the clamping fixture, and facilitate the disassembly of the beam mixer 6 after brazing, ensuring that the clamping fixture can be reused multiple times. When processing and forming the beam mixer 6, the beam 61, flange edge 62, center cone 63, bearing ring 64, upper mounting ring 65, lower mounting ring 66, connecting plate 67 and convex ring 68 are first connected by argon arc welding to obtain an intermediate product. After welding, the intermediate product is not heated to relieve stress, but is shaped. Then, the bearing housing 69 is placed on the positioning post 13 for positioning, and the intermediate product is placed on the base 1. The support component 4 passes through the intermediate product, the support ring 2 is embedded in the center cone 63 for positioning and support, and the convex ring 68 is embedded in the ring groove 12 for positioning. Then, the positioning ring 3 is placed on the top of the bezel 61, and the positioning ring 3 is positioned and supported by the support component 4 to ensure that the upper and lower ends of the part are coaxial. Then, the oil supply pipe 610 and the oil return pipe 611 are respectively placed into the intermediate product, and the two pipe fittings 612 are respectively placed into the protruding ends of the oil supply pipe 610 and the oil return pipe 611; the pipe fittings 612 are positioned by the positioning component 5 to complete the positioning and clamping of the parts. After the brazing filler metal is pre-placed, the parts and clamping fixture are sent together into a high-temperature furnace for high-temperature brazing, simultaneously relieving stress and eliminating the need for a furnace entry process. Under the constraint of the clamping fixture, no post-brazing alignment is required, saving the need for an alignment process. The clamping fixture of this application simplifies the processing steps and improves processing efficiency while ensuring the forming quality of the bezel mixer. Furthermore, the clamping fixture is made of graphite material, whose coefficient of thermal expansion is much smaller than that of the bezel mixer. When the brazing process is at high temperature, the thermal expansion rate of the positioning post 13 is less than that of the bearing seat 69, preventing the positioning post 13 from compressing the bearing seat 69. This ensures that the thermal expansion and contraction process of the bearing seat 69 is not interfered with, avoiding the problem of part deformation caused by the clamping fixture compressing the parts during heating, while also ensuring the coaxiality of the parts and guaranteeing the welding quality.
[0019] In a preferred embodiment, such as Figure 5 As shown, a gap is reserved between the inner diameter of the groove 11 and the outer diameter of the bearing seat 69. When the brazing process is at a high temperature, the bearing seat 69 expands due to heat. The reserved gap of the groove 11 ensures that the bearing seat 69 is not squeezed, thus avoiding the problem of the bearing seat 69 being squeezed and deformed by the inner wall of the groove 11 due to thermal expansion during the heating process.
[0020] In a preferred embodiment, such as Figure 4 and Figure 5 As shown, a gap is reserved between the outer diameter of the annular groove 12 and the outer diameter of the convex ring 68. When the brazing process is at a high temperature, the convex ring 68 expands due to heat. The reserved gap of the annular groove 12 ensures that the convex ring 68 is not squeezed, thus avoiding the problem of the convex ring 68 being squeezed and deformed by the inner wall of the annular groove 12 due to thermal expansion during the heating process.
[0021] In a preferred embodiment, such as Figure 3 and Figure 5As shown, the support assembly 4 includes several support columns 41, which are evenly distributed circumferentially between the annular groove 12 and the support ring 2. The bottom end of the support column 41 is fixedly connected to the base 1, and the top end is provided with a support platform 42. The positioning ring 3 has a first through hole 31 corresponding to the support column 41. The top end of the support column 41 is inserted into the corresponding first through hole 31 with a clearance fit.
[0022] In this embodiment, when installing the positioning ring 3, its inner hole is fitted onto the wave lobe 61, and then each first through hole 31 is aligned with the support column 41. The top end of the support column 41 is inserted into the corresponding first through hole 31. The positioning ring 3 is supported by the support platform 42, so that the positioning ring 3 is coaxial with the groove 11, thereby making the top and bottom structures of the part coaxial. The installation is convenient, the positioning is accurate, and the welding quality of the part is ensured.
[0023] In a preferred embodiment, such as Figure 3 and Figure 5 As shown, the positioning component 5 includes a support base 51 fixedly disposed on the top surface of the base 1 outside the annular groove 12. A second through hole 52 is provided on the support base 51 along the radial direction of the annular groove 12. A positioning block 53 passes through the second through hole 52 with clearance fit. A positioning groove 54 matching the contour of the pipe connector 612 is provided at one end of the positioning block 53 near the annular groove 12.
[0024] In this embodiment, the end of the positioning block 53 has two positioning grooves 54 corresponding to the two pipe joints 612. Pushing the positioning block 53 makes the pipe joint 612 completely embedded in the corresponding positioning groove 54, thus completing the positioning of the pipe joint 612. The installation is convenient and the positioning is accurate, ensuring the welding quality of the parts.
[0025] In a preferred embodiment, such as Figure 3 and Figure 5 As shown, the base 1 has several holes 14, which can reduce the internal stress of the graphite base 1 when it is heated, prevent the base 1 from cracking due to heat, and improve the structural safety.
[0026] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0027] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0028] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A high-temperature brazing anti-deformation clamping fixture for a thin-walled lobe mixer, characterized in that, include: The base (1) has a groove (11) on its top surface and an annular groove (12) coaxially distributed around the groove (11). A positioning post (13) is integrally formed in the groove (11). The outer diameter of the positioning post (13) is clearance-fitted with the inner diameter of the bearing seat (69) of the beam mixer (6). The inner diameter of the annular groove (12) is clearance-fitted with the inner diameter of the convex ring (68) of the beam mixer (6). The support ring (2) is integrally formed on the top surface of the base (1) and coaxially distributed on the outer periphery of the groove (11). The top contour of the support ring (2) matches the top contour inside the central cone (63) of the beam mixer (6). The positioning ring (3) is located above the base (1), and its inner diameter is in clearance fit with the outer diameter of the top of the lobe (61) of the lobe mixer (6). A support component (4) is disposed between the base (1) and the positioning ring (3) for positioning and supporting the positioning ring (3) so that it is coaxial with the groove (11); The positioning component (5) is fixedly installed on the top surface of the base (1) and located on the outside of the annular groove (12) for positioning the pipe joint (612) of the beam mixer (6); The base (1), support ring (2), positioning ring (3), support component (4) and positioning component (5) are all made of graphite material.
2. The high-temperature brazing anti-deformation clamping fixture for the thin-walled lobe mixer according to claim 1, characterized in that, A gap is reserved between the inner diameter of the groove (11) and the outer diameter of the bearing seat (69).
3. The high-temperature brazing anti-deformation clamping fixture for the thin-walled lobe mixer according to claim 1, characterized in that, A gap is reserved between the outer diameter of the annular groove (12) and the outer diameter of the convex ring (68).
4. The high-temperature brazing anti-deformation clamping fixture for the thin-walled lobe mixer according to claim 1, characterized in that, The support assembly (4) includes a plurality of support columns (41), which are evenly distributed circumferentially between the annular groove (12) and the support ring (2). The bottom end of the support column (41) is fixedly connected to the base (1), and the top end is provided with a support platform (42). The positioning ring (3) has a first through hole (31) corresponding to the support column (41) one by one. The top end of the support column (41) is inserted into the corresponding first through hole (31) with a clearance fit.
5. The high-temperature brazing anti-deformation clamping fixture for the thin-walled lobe mixer according to claim 1, characterized in that, The positioning component (5) includes a support base (51) fixedly disposed on the top surface of the base (1) located outside the annular groove (12). A second through hole (52) is provided on the support base (51) along the radial direction of the annular groove (12). A positioning block (53) passes through the second through hole (52) with clearance fit. A positioning groove (54) matching the contour of the pipe connector (612) is provided at one end of the positioning block (53) near the annular groove (12).
6. The high-temperature brazing anti-deformation clamping fixture for the thin-walled lobe mixer according to claim 1, characterized in that, The base (1) has several holes (14).