CN110834178A - Manufacturing method of Y-shaped connecting piece for spherical frame of airplane - Google Patents
Manufacturing method of Y-shaped connecting piece for spherical frame of airplane Download PDFInfo
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- CN110834178A CN110834178A CN201911030225.0A CN201911030225A CN110834178A CN 110834178 A CN110834178 A CN 110834178A CN 201911030225 A CN201911030225 A CN 201911030225A CN 110834178 A CN110834178 A CN 110834178A
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Abstract
The embodiment of the invention provides a method for manufacturing a Y-shaped connecting piece of an airplane spherical frame, which comprises the following steps: obtaining a bar-shaped blank; after the bar-shaped blank is subjected to rough blank manufacturing, bending the bar-shaped blank into an arc structure with a preset radian to obtain a rough blank; forging the rough blank by using a preset forging die to obtain a forged piece, wherein the forged piece can be cut into two identical pieces to be machined; cutting the forged piece to obtain two identical pieces to be machined; and machining the workpiece to be machined to obtain the Y-shaped connecting piece. When the technical method provided by the embodiment of the invention is used for manufacturing the connecting piece, the localization of the Y-shaped connecting piece can be realized, so that the cost of the Y-shaped connecting piece is reduced.
Description
Technical Field
The invention relates to the technical field of aircraft manufacturing, in particular to a method for manufacturing a Y-shaped connecting piece of an aircraft spherical frame.
Background
The Y-shaped connecting piece of the spherical frame of the airplane is generally in a semicircular arc shape with a larger outer diameter dimension, for example, the Y-shaped connecting piece of the spherical frame of the C919 airplane is in a one-third arc with an outer diameter dimension phi 2852 mm. Because Y type connecting piece size is great, the wall thickness is thinner, and thus, Y type connecting piece's rigidity is just relatively poor for easy deformation in the Y type connecting piece course of working, thereby make Y type connecting piece's the manufacturing degree of difficulty great.
The Y-shaped connecting piece is difficult to manufacture, so that the localization can not be broken through all the time, and the Y-shaped connecting piece is imported all the time from abroad, so that the cost of the Y-shaped connecting piece is higher.
Disclosure of Invention
The embodiment of the invention aims to provide a method for manufacturing a Y-shaped connecting piece of an airplane spherical frame, so that the localization of the Y-shaped connecting piece is realized, and the cost of the Y-shaped connecting piece is reduced. The specific technical scheme is as follows:
the embodiment of the invention provides a method for manufacturing a Y-shaped connecting piece of an airplane spherical frame, which comprises the following steps:
obtaining a bar-shaped blank;
after the bar-shaped blank is subjected to rough blank manufacturing, bending the bar-shaped blank into an arc structure with a preset radian to obtain a rough blank;
forging the rough blank by using a preset forging die to obtain a forged piece, wherein the forged piece can be cut into two identical pieces to be machined;
cutting the forged piece to obtain two identical pieces to be machined;
and machining the workpiece to be machined to obtain the Y-shaped connecting piece.
Optionally, when the bar-shaped blank is subjected to rough-forming, the used equipment is as follows: 2500 ton quick forging press, heating temperature is: the rough fire number is 35 ℃ below the phase transition point: 2 times, and the finish forging temperature is as follows: at any temperature of more than or equal to 800 ℃, the used tooling is as follows: radian and Y type connecting piece's radian assorted special crooked frock.
Optionally, when forging the rough blank, the used equipment is as follows: 200 million newton die forging press, heating temperature: the temperature is 35 ℃ below the transformation point, and the finish forging temperature is as follows: the temperature is more than or equal to any temperature of 800 ℃, and the die forging fire frequency is as follows: 2 times, wherein, the first time fire controls the underpressure 10mm, and the second time fire is any underpressure in the underpressure 2 ~ 3 mm.
Optionally, use and preset forging mould to the rough blank forges, obtains the forging, includes:
forging the rough blank by using a preset forging die;
and carrying out sizing, heat treatment, cooling, surface cleaning, physical and chemical inspection and final inspection on the forged rough blank to obtain a forged piece.
Optionally, the step of cooling includes: and cooling the mixture to a preset temperature in the equipment for carrying out the heat treatment, and taking out the mixture for air cooling.
Optionally, the apparatus for performing the heat treatment is an air furnace.
Optionally, the machining the workpiece to be machined includes:
and machining the workpiece to be machined by using a vertical lathe.
Optionally, the machining the workpiece to be machined by using a vertical lathe includes: roughly machining an inner molded surface and an outer molded surface; semi-finishing the inner profile and the outer profile; and finishing the inner molded surface and the outer molded surface.
Optionally, profile and appearance in the semi-finishing include:
treat the machined part with the clamping of first appearance face support fixture, the clamp plate is pressed in proper order and is treated on the machined part outside edge, and semi-finishing treats machined part inner surface, leaves surplus 5mm, and wherein, cutting parameter is: the rotating speed S of the main shaft is 8r/min, the feeding speed F is 0.4mm/min, and the axial feeding amount Ap is 0.6 mm;
treat the machined part with the clamping of first interior profile support anchor clamps, the clamp plate is pressed in proper order and is treated the inboard edge of machined part on, and semi-finishing treats the outer profile of machined part, leaves surplus 5mm, and wherein, cutting parameter is: the main shaft rotation speed S is 8r/min, the feeding speed F is 0.4mm/min, and the axial feeding amount Ap is 0.6 mm.
Optionally, finish machining inner profile and outer profile includes:
treating the workpiece by clamping a second external profile supporting clamp, pressing the outer edge of the workpiece by a pressing plate in sequence, and treating the preset size from the internal profile to the internal profile of the workpiece by finish machining, wherein the cutting parameters are as follows: the rotating speed S of the main shaft is 7r/min, the feeding speed F is 0.3mm/min, and the axial feeding amount Ap is 0.5 mm;
treat the machined part with profile support fixture clamping in the second, the clamp plate is pressed in proper order and is treated on the inboard edge of machined part, and the finish machining is treated the machined part outer profile and is preset size to the outer profile, and wherein, cutting parameter is: the main shaft rotation speed S is 7r/min, the feeding speed F is 0.3mm/min, and the axial feeding amount Ap is 0.5 mm.
The method for manufacturing the Y-shaped connecting piece of the spherical frame of the airplane provided by the embodiment of the invention realizes localization, so that the cost of the Y-shaped connecting piece is reduced, in addition, the forged piece forged at one time can be processed into two Y-shaped connecting pieces, if the weight of the blank of the forged piece is 286kg, and the weight of the separated single blank is only 143kg, so that the cost of raw materials can be reduced, and the deformation in the forging and heat treatment processes can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic flow chart of a method for manufacturing a Y-shaped connector for an aircraft spherical frame according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first external profile supporting fixture according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a first internal profile support fixture according to an embodiment of the present invention;
figure 4 is a schematic diagram of a second profile support jig according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second internal profile support clamp according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
In order to realize localization of the Y-shaped connecting piece and reduce the cost of the Y-shaped connecting piece, the embodiment of the invention provides a method for manufacturing the Y-shaped connecting piece of the spherical frame of the airplane.
The method for manufacturing the Y-shaped connecting piece of the spherical frame of the airplane provided by the embodiment of the invention can be applied to the airplane manufacturing industry.
As shown in fig. 1, the method for manufacturing a Y-shaped connector for an aircraft spherical frame according to an embodiment of the present invention includes the following steps:
s101: a rod-shaped billet is obtained.
The rod-shaped billet may be, for example, a cylindrical billet having a diameter of 180 mm and a length of 3100 mm. The bar stock may be of other sizes and shapes, and may be specifically sized for the Y-connector.
S102: and after the bar-shaped blank is subjected to rough blank manufacturing, bending the bar-shaped blank into an arc structure with a preset radian to obtain the rough blank.
When the bar-shaped blank is subjected to rough-forming, the used equipment can be as follows: 2500 ton rapid forging machine, heating temperature can be: the rough fire number can be as follows at 35 ℃ below the phase transition point: 2 times, the finish forging temperature can be: at any temperature of more than or equal to 800 ℃, the used tool can be as follows: radian and Y type connecting piece's radian assorted special crooked frock. The temperature of 35 ℃ below the transformation point is 35 ℃ lower than that of the bar-shaped blank.
When the bar-shaped blank is subjected to rough forging, other forging equipment, heating temperature, heating frequency, finish forging temperature and tooling can be used according to actual conditions, and the embodiment of the invention is not particularly limited.
S103: forging the raw blank by using a preset forging die to obtain a forged piece, wherein the forged piece can be cut into two identical pieces to be machined.
When forging the raw blank, the equipment used may be: the heating temperature of the 200 million Newton die forging press can be as follows: the temperature of the finish forging is 35 ℃ below the transformation point, and can be as follows: the temperature is more than or equal to any temperature of 800 ℃, and the die forging fire frequency can be as follows: 2 times, wherein, the first time fire control under-voltage can be 10mm, and the second time fire under-voltage can be any under-voltage in 2 ~ 3 mm.
When the above-mentioned raw billet is forged, other forging devices, heating temperatures, heating times and finish forging temperatures can be used according to actual conditions, and the embodiment of the present invention is not particularly limited.
In a specific embodiment, step S103 can be implemented as the following steps:
forging the rough blank by using a preset forging die; and carrying out sizing, heat treatment, cooling, surface cleaning, physical and chemical inspection and final inspection on the forged rough blank to obtain a forged piece. In this way, the resulting forged part is more amenable to post-process machining.
In a specific embodiment, the step of cooling may be implemented as the following steps: cooling the mixture to a preset temperature in the equipment for carrying out the heat treatment, taking the mixture out, and cooling the mixture in air. The equipment for performing the heat treatment may be an air furnace or other heat treatment equipment.
S104: and cutting the forged piece to obtain two identical pieces to be machined.
In an embodiment of the present invention, the forged part may be cut using a vertical numerical control machine.
S105: and machining the workpiece to be machined to obtain the Y-shaped connecting piece.
In the embodiment of the present invention, the workpiece to be machined may be machined using a vertical lathe.
In an embodiment, the machining of the workpiece to be machined by using a vertical lathe may include: roughly machining an inner molded surface and an outer molded surface; semi-finishing the inner profile and the outer profile; and finishing the inner molded surface and the outer molded surface.
In one embodiment, the semi-finishing of the inner and outer profiles may comprise the steps of:
treat the machined part with the clamping of first appearance face support fixture, the clamp plate is pressed in proper order and is treated on the machined part outside edge, and semi-finishing treats machined part inner surface, leaves surplus 5mm, and wherein, cutting parameter is: the rotating speed S of the main shaft is 8r/min, the feeding speed F is 0.4mm/min, and the axial feeding amount Ap is 0.6 mm;
treat the machined part with the clamping of first interior profile support anchor clamps, the clamp plate is pressed in proper order and is treated the inboard edge of machined part on, and semi-finishing treats the outer profile of machined part, leaves surplus 5mm, and wherein, cutting parameter is: the main shaft rotation speed S is 8r/min, the feeding speed F is 0.4mm/min, and the axial feeding amount Ap is 0.6 mm.
In one embodiment, the finishing inner and outer profiles comprise:
treating the workpiece by clamping a second external profile supporting clamp, pressing the outer edge of the workpiece by a pressing plate in sequence, and treating the preset size from the internal profile to the internal profile of the workpiece by finish machining, wherein the cutting parameters are as follows: the rotating speed S of the main shaft is 7r/min, the feeding speed F is 0.3mm/min, and the axial feeding amount Ap is 0.5 mm;
treat the machined part with profile support fixture clamping in the second, the clamp plate is pressed in proper order and is treated on the inboard edge of machined part, and the finish machining is treated the machined part outer profile and is preset size to the outer profile, and wherein, cutting parameter is: the main shaft rotation speed S is 7r/min, the feeding speed F is 0.3mm/min, and the axial feeding amount Ap is 0.5 mm.
In an embodiment, the first outer profile supporting jig, the first inner profile supporting jig, the second outer profile supporting jig, and the second inner profile supporting jig may be structured as shown in fig. 2, 3, 4, and 5, respectively.
Because the price of the vertical numerically controlled lathe is low, for example, the price of the 4-meter numerically controlled vertical lathe is about 150 ten thousand yuan, the Y-shaped connecting piece machined by the vertical numerically controlled lathe in the embodiment of the invention has extremely high economical efficiency, and the machining cost is about one third of that of a 4-meter five-axis machine tool. Meanwhile, the vertical lathe is used for machining the turning tool, so that the tool consumption is small, the resistance is small, the internal stress generated by machining is small, the deformation of the connecting piece is well relieved, the most important thing is that the vertical lathe is adopted, the machining efficiency is high, and the machining period of the connecting piece is greatly shortened.
The spherical frame Y-shaped connecting piece is large in size and not a whole circle, inconvenience is brought to vertical lathe machining and clamping, the thickness of the wall of a part is thin, the material removal amount is large, the rigidity of the whole structure is poor, and a cutter is easy to shake in the machining process. In the embodiment of the invention, four groups of clamps are designed in the semi-finishing process and the finishing process to be clamped and processed in four processes, so that the problems can be well solved.
Through simulation calculation, the forging scheme adopting two pieces of overlapped die forging has less allowance, lower consumption of single piece of material, reduced deformation risk, flow lines basically distributed along the appearance of the part, better material economy and suitability for forging the raw materials of the Y-shaped connecting piece part of the spherical frame of the airplane, such as a C919 airplane.
The method for manufacturing the Y-shaped connecting piece of the spherical frame of the airplane provided by the embodiment of the invention realizes localization, so that the cost of the Y-shaped connecting piece is reduced, in addition, the forged piece forged at one time can be processed into two Y-shaped connecting pieces, if the weight of the blank of the forged piece is 286kg, and the weight of the separated single blank is only 143kg, so that the cost of raw materials can be reduced, and the deformation in the forging and heat treatment processes can be reduced.
In one embodiment, the process flow of the manufacturing process of the Y-shaped connection element for the spherical frame of the airplane can also be as shown in table 1 below:
TABLE 1
| Work order number | Name of procedure | Use device | Remarks for note |
| 5 | Forging of raw material | Hydraulic forging press | |
| 10 | Thermal treatment | Air furnace | |
| 15 | Reference plane for machining | Three-axis gantry numerical control machine tool | |
| 20 | Ultrasonic testing | Ultrasonic detector | |
| 25 | Physical and chemical detection of materials | Analytical laboratory | |
| 30 | Mechanical property test | Analytical laboratory | |
| 35 | Separation of forged parts | Vertical numerically controlled lathe | Use special frock |
| 40 | Natural aging of | ||
| 45 | Roughing inner and outer profiles | Vertical numerically controlled lathe | |
| 50 | Natural aging of | ||
| 55 | Semi-finishing internal and external profiles | Vertical numerically controlled lathe | Use special frock |
| 60 | Natural aging of | ||
| 65 | Finish machining of internal and external profiles | Vertical numerically controlled lathe | Use special frock |
| 70 | Two end faces of the finished part | Numerical control milling machine | Use special frock |
| 75 | Detecting and metering | CMM | |
| 80 | Parts cleaning | Surface treatment line | |
| 85 | Fluorescence detection | Fluorescence detection line | |
| 90 | Parts pickling | Surface treatment line | |
| 95 | Shot peening | Shot blasting equipment | |
| 100 | Surface passivation | Surface treatment line | |
| 105 | Part marking | Code spraying equipment | |
| 110 | Full inspection of parts |
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A method for manufacturing a Y-shaped connecting piece of an airplane spherical frame is characterized by comprising the following steps:
obtaining a bar-shaped blank;
after the bar-shaped blank is subjected to rough blank manufacturing, bending the bar-shaped blank into an arc structure with a preset radian to obtain a rough blank;
forging the rough blank by using a preset forging die to obtain a forged piece, wherein the forged piece can be cut into two identical pieces to be machined;
cutting the forged piece to obtain two identical pieces to be machined;
and machining the workpiece to be machined to obtain the Y-shaped connecting piece.
2. Method according to claim 1, characterized in that in the blanking of the rod-shaped blanks, the equipment used is: 2500 ton quick forging press, heating temperature is: the rough fire number is 35 ℃ below the phase transition point: 2 times, and the finish forging temperature is as follows: at any temperature of more than or equal to 800 ℃, the used tooling is as follows: radian and Y type connecting piece's radian assorted special crooked frock.
3. The method according to claim 1, characterized in that in forging the pierced blank the equipment used is: 200 million newton die forging press, heating temperature: the temperature is 35 ℃ below the transformation point, and the finish forging temperature is as follows: the temperature is more than or equal to any temperature of 800 ℃, and the die forging fire frequency is as follows: 2 times, wherein, the first time fire controls the underpressure 10mm, and the second time fire is any underpressure in the underpressure 2 ~ 3 mm.
4. The method of claim 1, wherein said forging said pierced blank using a pre-set forging die to obtain a forged part comprises:
forging the rough blank by using a preset forging die;
and carrying out sizing, heat treatment, cooling, surface cleaning, physical and chemical inspection and final inspection on the forged rough blank to obtain a forged piece.
5. The method of claim 4, wherein the step of cooling comprises: and cooling the mixture to a preset temperature in the equipment for carrying out the heat treatment, and taking out the mixture for air cooling.
6. The method of claim 5, wherein the heat treatment is performed in an air furnace.
7. The method according to claim 1, wherein said machining said piece to be worked comprises:
and machining the workpiece to be machined by using a vertical lathe.
8. The method according to claim 7, wherein the machining the workpiece to be machined using a vertical lathe comprises: roughly machining an inner molded surface and an outer molded surface; semi-finishing the inner profile and the outer profile; and finishing the inner molded surface and the outer molded surface.
9. The method of claim 8, wherein the semi-finishing inner and outer profiles comprises:
treat the machined part with the clamping of first appearance face support fixture, the clamp plate is pressed in proper order and is treated on the machined part outside edge, and semi-finishing treats machined part inner surface, leaves surplus 5mm, and wherein, cutting parameter is: the rotating speed S of the main shaft is 8r/min, the feeding speed F is 0.4mm/min, and the axial feeding amount Ap is 0.6 mm;
treat the machined part with the clamping of first interior profile support anchor clamps, the clamp plate is pressed in proper order and is treated the inboard edge of machined part on, and semi-finishing treats the outer profile of machined part, leaves surplus 5mm, and wherein, cutting parameter is: the main shaft rotation speed S is 8r/min, the feeding speed F is 0.4mm/min, and the axial feeding amount Ap is 0.6 mm.
10. The method of claim 8, wherein finishing the inner and outer profiles comprises:
treating the workpiece by clamping a second external profile supporting clamp, pressing the outer edge of the workpiece by a pressing plate in sequence, and treating the preset size from the internal profile to the internal profile of the workpiece by finish machining, wherein the cutting parameters are as follows: the rotating speed S of the main shaft is 7r/min, the feeding speed F is 0.3mm/min, and the axial feeding amount Ap is 0.5 mm;
treat the machined part with profile support fixture clamping in the second, the clamp plate is pressed in proper order and is treated on the inboard edge of machined part, and the finish machining is treated the machined part outer profile and is preset size to the outer profile, and wherein, cutting parameter is: the main shaft rotation speed S is 7r/min, the feeding speed F is 0.3mm/min, and the axial feeding amount Ap is 0.5 mm.
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| CN110834178B (en) | 2021-09-14 |
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