CN110860861A - Processing and manufacturing method of C-shaped frame - Google Patents
Processing and manufacturing method of C-shaped frame Download PDFInfo
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- CN110860861A CN110860861A CN201911224255.5A CN201911224255A CN110860861A CN 110860861 A CN110860861 A CN 110860861A CN 201911224255 A CN201911224255 A CN 201911224255A CN 110860861 A CN110860861 A CN 110860861A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/14—Titanium or alloys thereof
Abstract
The invention relates to a processing and manufacturing method of a C-shaped frame. Respectively preparing a transition section, a support section and a plurality of connecting workpieces spliced into a mounting section according to the structure of the C-shaped frame; friction welding the transition section and the support section together; and sequentially friction welding a plurality of connecting workpieces at one end of the transition section. The method also comprises the steps of preparing an installation transition section and a support section which are integrally connected with the installation section and the transition section according to the structure of the C-shaped frame; connecting the installation transition section with an upsetting clamp at one side of the friction welding equipment, connecting the support section with an upsetting clamp at the other side of the friction welding equipment, arranging a pre-welding connecting section between the installation transition section and the support section, connecting the pre-welding connecting section with a vibration clamp of the friction welding equipment, and starting the friction welding equipment for friction welding. The method has the advantages of good weld joint structure performance, good welding quality and high reliability, and is suitable for the field of aircraft titanium alloy workpiece processing.
Description
Technical Field
The invention relates to the technical field of aircraft C-shaped frame processing and preparation, in particular to a processing and manufacturing method of a C-shaped frame.
Background
Many titanium alloy workpieces used in modern aircraft, such as C-frames on aircraft, are typically configured as shown in fig. 1, and are characterized by long dimensions, including mounting, transition, and support sections. The C-shaped frame is arranged on a truss at the lower part of the fuselage of an aircraft (such as an airplane) by the mounting section, and the part bears a large load and belongs to a thin-wall multi-rib structure; the supporting section is used for installing aircraft fuselage skin, the bearing load is relatively small, and the cross section is generally Z-shaped; the transition section realizes the transition of the installation section and the support section. Because the length size of the C-shaped frame is too large, the integral forging process cannot be adopted at present, so that the C-shaped frame can only be divided into a plurality of sections to be welded into a whole at present, and then the C-shaped frame is realized by a numerical control processing technical scheme.
However, the welding quality cannot be guaranteed by the existing welding method, and a high-quality C-shaped frame cannot be obtained. In view of this, how to provide a method for processing and manufacturing a C-shaped frame makes the obtained C-shaped frame have good welding effect and good quality, and technical problems to be solved by those skilled in the art are urgently needed.
Disclosure of Invention
(1) Technical problem to be solved
The embodiment of the invention provides a method for processing and manufacturing a C-shaped frame in a first aspect. Including friction welding the transition section and the support section together; and sequentially friction welding a plurality of connecting workpieces at one end of the transition section. The problem that the C-shaped frame cannot be integrally forged is solved; meanwhile, the friction welding technology is adopted to weld the components into a whole for many times, and the welding seam has good structure performance and high reliability.
The second aspect of the embodiment of the invention further provides a processing and manufacturing method of the C-shaped frame. Adopting a friction welding technology to weld the three sections into a whole by one time; the processing amount before welding is small, and the preparation time before welding is shortened; only one welding is carried out, so that the welding time is greatly shortened; the number of welding seams is reduced, and the welding seam processing time after welding is greatly shortened.
(2) Technical scheme
In a first aspect of the embodiments of the present invention, a method for manufacturing a C-shaped frame is provided, where the C-shaped frame is formed by sequentially connecting an installation section, a transition section, and a support section, and includes: respectively preparing the transition section, the support section and a plurality of connecting workpieces spliced into the installation section according to the structure of the C-shaped frame; friction welding the transition section and the support section together; and sequentially friction welding a plurality of connecting workpieces at one end of the transition section.
Further, the connecting workpiece and the transition section are made of titanium alloy forgings through numerical control machining.
Further, the support section is formed by bending a section bar.
Further, the connecting workpiece is composed of a first mounting section, a second mounting section and a third mounting section.
Further, when the transition section and the support section are in friction welding, the transition section is installed on a vibration clamp of friction welding equipment, and the support section is installed on an upsetting clamp of the friction welding equipment.
Further, when the first installation section and the transition section are in friction welding, the first installation section is installed on a vibration clamp of friction welding equipment, and the transition section is installed on an upsetting clamp of the friction welding equipment; when the second mounting section and the first mounting section are in friction welding, mounting the second mounting section on a vibration clamp of friction welding equipment, and mounting the first mounting section on an upsetting clamp of the friction welding equipment; and when the third mounting section and the second mounting section are in friction welding, the third mounting section is mounted on a vibration clamp of friction welding equipment, and the second mounting section is mounted on an upsetting clamp of the friction welding equipment.
Further, the processing and manufacturing method further comprises the following steps: and milling after friction welding to remove welding flash.
The first aspect of the embodiments of the present invention provides a method for manufacturing a C-shaped frame, where the C-shaped frame includes a mounting section, a transition section, and a support section, and the method includes: preparing an installation transition section and a support section, wherein the installation transition section and the support section are integrally connected according to the structure of the C-shaped frame; connecting the installation transition section with an upsetting clamp at one side of the friction welding equipment, connecting the support section with an upsetting clamp at the other side of the friction welding equipment, arranging a pre-welding connecting section between the installation transition section and the support section, connecting the pre-welding connecting section with a vibration clamp of the friction welding equipment, and starting the friction welding equipment to perform friction welding; and milling the redundant part of the connecting section before welding according to the cross section shape of the supporting section.
Further, the cross-sectional area of the pre-welding connecting section is not smaller than the cross-sectional area of the supporting section.
Further, the cross section of the support section is of a Z-shaped structure.
(3) Advantageous effects
In summary, in the processing and manufacturing method of the first aspect of the present invention, the C-shaped frame is divided into the transition section, the support section and the plurality of connecting workpieces spliced into the mounting section, and then the welding is performed by the friction welding technology, so as to solve the problem that the C-shaped frame cannot be integrally forged; the friction welding technology integrates the titanium alloy and the titanium alloy into a whole, has the advantages of good welding seam structure performance, good welding quality and high reliability, and is very suitable for the field of titanium alloy workpiece processing of aircrafts.
In addition, in the processing and manufacturing method of the other aspect of the invention, the C-shaped frame is divided into the supporting section, the connecting section before welding and the mounting transition section, so that the problem that the C-shaped frame cannot be integrally forged is solved; the friction welding technology is adopted, the three sections are welded into a whole at one time, and the method has the advantages of small processing amount before welding, shortened preparation time before welding and greatly shortened welding time; meanwhile, the number of welding seams is reduced, the welding seam processing time after welding is greatly shortened, and the method has the advantages of high processing efficiency and good processing quality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a C-shaped frame in the prior art.
Fig. 2 is a schematic view of the principle of friction welding in the prior art.
FIG. 3 is a schematic structural diagram of a C-shaped frame to be welded according to the first aspect of the embodiment of the present invention.
Fig. 4 is a schematic structural view of a support section and a transition section welded together according to a first aspect of an embodiment of the present invention.
Fig. 5 is a schematic structural view of a transition section and a first mounting section welded together according to the first aspect of the embodiment of the present invention.
Fig. 6 is a schematic structural view of the first mounting section and the second mounting section welded together according to the first aspect of the embodiment of the present invention.
Fig. 7 is a schematic structural view of the second mounting section and the third mounting section welded together according to the first aspect of the embodiment of the present invention.
FIG. 8 is a schematic structural diagram of a C-shaped frame to be welded according to a second aspect of the embodiment of the present invention.
In the figure: the mounting structure comprises a support section 1, a transition section 2, a first mounting section 3, a second mounting section 4, a third mounting section 5, a pre-welding connecting section 6 and a mounting transition section 7.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, alterations, and improvements in the parts, components, and connections without departing from the spirit of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The present application will be described in detail with reference to the accompanying drawings 2-8 in conjunction with an embodiment.
Before introducing the embodiment of the invention, the basic knowledge of friction welding needs to be known, and the friction welding is a pressure welding method, has the advantage of good welding quality, is particularly suitable for welding materials with small heat conductivity and good plasticity, and therefore becomes a preferred process for manufacturing titanium alloy workpieces. The principle of friction welding is shown in figure 2. The vibration workpiece realizes linear vibration at a certain frequency and amplitude in the vertical direction; the upsetting workpiece is in contact with the end face of the vibrating workpiece under the action of horizontal upsetting force, high-frequency friction is generated on a contact surface to generate heat, the material of the contact surface is softened and extruded along with the rise of temperature, when the extrusion reaches a certain degree, the vibrating workpiece stops vibrating quickly, the upper surfaces of the two workpieces are aligned, the horizontal upsetting force is applied, the two workpieces are connected into a whole, and the welding process is completed. Due to the characteristics of the linear friction welding process, the vibration workpiece needs to realize high-frequency vibration, so the length size of the vibration workpiece is limited, and the largest friction welding equipment in China at present can only weld the vibration workpiece with the length size not greater than 300 mm.
Referring to fig. 3 to 7, a method for manufacturing a C-shaped frame according to a first aspect of the embodiments of the present invention includes: according to the structure of the C-shaped frame, the transition section 2, the support section 1 and a plurality of connecting workpieces spliced into the installation section are respectively prepared; the transition section 2 and the support section 1 are welded together through friction welding; and sequentially friction welding a plurality of connecting workpieces at one end of the transition section 2.
Firstly, considering the actual situation that the C-shaped frame is difficult to be processed and formed in the prior art in one step, such as forging, extruding, bending and the like, according to the structural characteristics of the C-shaped frame and the limit of friction welding on the length of a vibration workpiece, the embodiment of the invention respectively prepares a transition section 2, a support section 1 and a plurality of connecting workpieces spliced into an installation section; the reason is that the transition section 2 is generally short in length and suitable for being used as a vibration workpiece during friction welding, while the support section 1 is long in structure and can be used as an upset workpiece during friction welding, and the support section 1 can be integrally formed and machined and can be machined at one time as a whole, so that the structural integrity of the support section is kept, and the structural strength of the support section 1 is improved; finally, considering the actual condition that the mounting section has a longer structure, the mounting section is initially processed into a plurality of connecting workpieces, and then the connecting workpieces are sequentially used as vibrating workpieces in the friction welding process, so that the friction welding is conveniently realized.
According to the processing and manufacturing method of the C-shaped frame, the C-shaped frame is divided into the transition section 2, the support section 1 and the connecting workpieces which are spliced into the installation sections, and then welding is carried out through a friction welding technology, so that the problem that the C-shaped frame cannot be integrally forged is solved; the friction welding technology integrates the titanium alloy and the titanium alloy into a whole, has the advantages of good welding seam structure performance, good welding quality and high reliability, and is very suitable for the field of titanium alloy workpiece processing of aircrafts.
Specifically, in the method for machining and manufacturing the C-shaped frame according to the first aspect of the embodiment of the present invention, the connecting workpiece and the transition section 2 may be prepared from a titanium alloy forging by numerical control machining. Generally, the titanium alloy material has the advantages of light weight and high structural strength, and is very suitable for the C-shaped frame structure of the aircraft; the installation section in the C-shaped frame is a structural component for installing the C-shaped frame on a truss at the lower part of the fuselage of an aircraft (such as an airplane), and the part bears a large load and belongs to a thin-wall multi-rib structure; the transition section 2 realizes the transition between the mounting section and the supporting section, and has higher requirement on structural strength. Therefore, the selected forge piece is used for preparing the mounting section and the transition section which bear larger load through the numerical control processing equipment, and the device has the advantages of high structural strength and convenience in processing.
Specifically, the support section 1 in the manufacturing method of the C-shaped frame according to the first aspect of the embodiment of the present invention may be formed by bending a section bar. Generally, the supporting section 1 in the C-shaped frame is mainly used for installing the skin of the aircraft fuselage, and the load bearing capacity of the supporting section is relatively small, so that the supporting section is formed by selecting and bending a section bar and has the advantages of light weight, less material consumption and convenience in processing.
Specifically, referring to fig. 3 to 7, in the method for manufacturing a C-shaped frame according to the first aspect of the embodiment of the present invention, the connecting workpiece is composed of a first mounting section 3, a second mounting section 4, and a third mounting section 5. The connecting workpiece spliced into the mounting sections consists of the first mounting section 3, the second mounting section 4 and the third mounting section 5, which are determined by the actual length of the mounting sections and the length requirement of the friction welding equipment on the vibrating workpiece. Generally, the largest friction welding equipment at present can only weld vibration workpieces with the length dimension not more than 300mm, and the length of the mounting section generally exceeds 600mm, so that the mounting section at least needs to be split into three sections to be sequentially subjected to friction processing; and splitting the mounting section into three sections has the advantage of a minimum number of machining times.
Specifically, in the method for manufacturing a C-shaped frame according to the first aspect of the embodiment of the present invention, when the transition section 2 and the support section 1 are friction welded, the transition section 2 may be mounted on a vibration fixture of a friction welding device, and the support section 1 may be mounted on an upsetting fixture of the friction welding device, and a welded seam 1 as shown in fig. 4 is generated in a welded completed figure; then, when the first installation section 4 and the transition section 2 are friction welded, the first installation section 4 can be installed on a vibration clamp of a friction welding device, the transition section 2 is installed on an upsetting clamp of the friction welding device, and a welding seam 2 is generated as shown in the figure shown in fig. 5 after the welding is completed; when the second installation section 5 and the first installation section 4 are in friction welding, the second installation section 5 can be installed on a vibration clamp of friction welding equipment, the first installation section 4 is installed on an upsetting clamp of the friction welding equipment, and a welding seam 3 is generated as shown in the drawing when the welding is completed and is shown in figure 6; finally, the third mounting section 6 may be mounted on a vibration jig of a friction welding apparatus and the second mounting section 5 may be mounted on an upset jig of the friction welding apparatus while friction welding the third mounting section 6 to the second mounting section 5, the welded joint 4 being produced as shown in fig. 7.
Further, the method for processing and manufacturing the C-shaped frame according to the first aspect of the embodiment of the present invention further includes: and milling after friction welding to remove welding flash. The milling process can remove the flash generated in the welding process, so that the surface of the C-shaped frame is smoother, the phenomenon that the rough flash is easy to generate static electricity and electrochemical reaction is reduced, and the service life of the C-shaped frame is prolonged.
Referring to fig. 8, in a second aspect of the embodiment of the present invention, a method for manufacturing a C-shaped frame, the C-shaped frame including a mounting section, a transition section 2 and a support section 1, includes: preparing an installation transition section 7 and the support section 1, wherein the installation transition section and the transition section 2 are integrally connected according to the structure of the C-shaped frame; connecting the installation transition section 7 with an upsetting clamp at one side of the friction welding equipment, connecting the support section 1 with an upsetting clamp at the other side of the friction welding equipment, arranging a pre-welding connecting section 6 between the installation transition section 7 and the support section 1, connecting the pre-welding connecting section 6 with a vibration clamp of the friction welding equipment, and starting the friction welding equipment to perform friction welding; and (3) milling the redundant part of the pre-welding connecting section 6 according to the cross-sectional shape of the support section 1.
In the embodiment of the invention, firstly, a C-shaped frame is divided into a supporting section 1 and an installation transition section 7, wherein the installation transition section 7 consists of the installation section and the transition section 2; then a pre-welding connecting section 6 is arranged between the supporting section 1 and the installation transition section 7; because the installation transition section 7 consists of the installation section and the transition section 2, the installation transition section is longer and is not suitable for being connected with a vibration clamp of friction welding equipment. Therefore, the embodiment of the invention creatively arranges the pre-welding connecting section 6 between the support section 1 and the installation transition section 7, the length of the pre-welding connecting section 6 is not more than 300mm generally, the low-quality and short-length pre-welding connecting section 6 is connected with a vibration clamp of friction welding equipment, and then the support section 1 and the installation transition section 7 are arranged at two sides of the pre-welding connecting section 6 and connected with an upsetting clamp of the friction welding equipment, so that the pre-welding connecting section 6 can rub against the support section 1 and the installation transition section 7 at two sides thereof under the vibration, thereby completing the friction welding connection at one time; and finally, removing the redundant part of the connecting section 6 before the welding flash welding by utilizing milling processing to finish the whole processing process. During friction welding, the connecting section 6 before welding vibrates in high frequency, the mounting transition section 7 is in contact with the left side face of the connecting section 6 before welding rightwards under the action of driving force, meanwhile, the supporting section 1 is in contact with the right side face of the connecting section 6 before welding leftwards under the action of driving force, the two driving forces are the same in size and opposite in direction; the left side and the right side of the connecting section 6 are contacted and friction-heated simultaneously before welding, when the material is heated and softened to a certain degree, the connecting section 6 stops vibrating before welding, the three welding parts are integrated, and the welding is finished.
According to the embodiment of the invention, the C-shaped frame is divided into the supporting section 1, the pre-welding connecting section 6 and the installation transition section 7, so that the problem that the C-shaped frame cannot be integrally forged is solved; the friction welding technology is adopted, the three sections are welded into a whole at one time, the processing amount before welding is small, and the preparation time before welding is shortened; the welding time is greatly shortened; the number of welding seams is also reduced, the welding seam processing time after welding is greatly shortened, and the method has the advantages of high processing efficiency and good processing quality.
Specifically, in the method for manufacturing a C-shaped frame according to the second aspect of the embodiment of the present invention, the cross-sectional area of the connecting section 6 before welding is not smaller than the cross-sectional area of the support section 1. Meanwhile, the cross section of the support section 1 may be a Z-shaped structure. The pre-welding connecting section 6 needs to vibrate during friction welding, so the sectional area of the pre-welding connecting section is not smaller than that of the supporting section 1, and a certain margin is reserved around the interface of the pre-welding connecting section 6 for the movement of friction amplitude.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. For embodiments of the method, reference is made to the description of the apparatus embodiments in part. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
The above description is only an example of the present application and is not limited to the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A processing and manufacturing method of a C-shaped frame is characterized by comprising the following steps of:
respectively preparing the transition section, the support section and a plurality of connecting workpieces spliced into the installation section according to the structure of the C-shaped frame;
friction welding the transition section and the support section together;
and sequentially friction welding a plurality of connecting workpieces at one end of the transition section.
2. The machining and manufacturing method of the C-shaped frame is characterized in that the connecting workpiece and the transition section are made of titanium alloy forgings through numerical control machining.
3. The method as claimed in claim 1, wherein the support section is formed by bending a section bar.
4. A method for manufacturing a C-shaped frame according to claim 1, wherein the connecting piece is composed of a first mounting section, a second mounting section and a third mounting section.
5. A method for manufacturing a C-shaped frame according to claim 1, wherein the transition section is mounted on a vibration clamp of a friction welding device when the transition section and the support section are in friction welding, and the support section is mounted on an upsetting clamp of the friction welding device.
6. A C-shaped frame machining and manufacturing method according to claim 4, characterized in that the first mounting section is mounted on a vibration clamp of friction welding equipment when the first mounting section and the transition section are in friction welding, and the transition section is mounted on an upsetting clamp of the friction welding equipment;
when the second mounting section and the first mounting section are in friction welding, mounting the second mounting section on a vibration clamp of friction welding equipment, and mounting the first mounting section on an upsetting clamp of the friction welding equipment;
and when the third mounting section and the second mounting section are in friction welding, the third mounting section is mounted on a vibration clamp of friction welding equipment, and the second mounting section is mounted on an upsetting clamp of the friction welding equipment.
7. The machining and manufacturing method of the C-shaped frame as claimed in claim 1, further comprising: and milling after friction welding to remove welding flash.
8. A processing and manufacturing method of a C-shaped frame, wherein the C-shaped frame comprises a mounting section, a transition section and a supporting section, and is characterized by comprising the following steps:
preparing an installation transition section and a support section, wherein the installation transition section and the support section are integrally connected according to the structure of the C-shaped frame;
connecting the installation transition section with an upsetting clamp at one side of the friction welding equipment, connecting the support section with an upsetting clamp at the other side of the friction welding equipment, arranging a pre-welding connecting section between the installation transition section and the support section, connecting the pre-welding connecting section with a vibration clamp of the friction welding equipment, and starting the friction welding equipment to perform friction welding;
and milling the redundant part of the connecting section before welding according to the cross section shape of the supporting section.
9. A method for manufacturing a C-shaped frame according to claim 8, wherein the cross-sectional area of the connecting section before welding is not smaller than that of the supporting section.
10. The method for manufacturing a C-shaped frame according to claim 8, wherein the cross section of the supporting section is of a Z-shaped structure.
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| CN201911224255.5A CN110860861B (en) | 2019-12-03 | 2019-12-03 | Processing and manufacturing method of C-shaped frame |
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| CN201911224255.5A CN110860861B (en) | 2019-12-03 | 2019-12-03 | Processing and manufacturing method of C-shaped frame |
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| CN110860861B (en) | 2021-05-11 |
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