CN117884848A - Processing method of oil transportation elbow joint of aircraft engine - Google Patents
Processing method of oil transportation elbow joint of aircraft engine Download PDFInfo
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- CN117884848A CN117884848A CN202410302476.4A CN202410302476A CN117884848A CN 117884848 A CN117884848 A CN 117884848A CN 202410302476 A CN202410302476 A CN 202410302476A CN 117884848 A CN117884848 A CN 117884848A
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- 210000002310 elbow joint Anatomy 0.000 title claims abstract description 119
- 238000003672 processing method Methods 0.000 title claims abstract description 9
- 238000012545 processing Methods 0.000 claims abstract description 57
- 238000003754 machining Methods 0.000 claims description 156
- 238000000034 method Methods 0.000 claims description 28
- 239000003921 oil Substances 0.000 claims description 23
- 239000010705 motor oil Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 210000001503 joint Anatomy 0.000 description 9
- 239000000446 fuel Substances 0.000 description 6
- 238000005266 casting Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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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Abstract
The invention discloses a processing method of an oil transportation elbow joint of an aircraft engine, which relates to the technical field of mechanical manufacturing processing, realizes batch processing production of the elbow joint, and has the advantages that the processing cost of the elbow joint must be considered, compared with the processing cost of a five-axis linkage numerical control processing center, the processing cost of a numerical control lathe is much lower, so that equipment with low cost is used as much as possible for processing, and the processing method is also a problem to be considered.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a machining method of an oil transportation elbow joint of an aircraft engine.
Background
Aircraft engine fuel delivery fittings are an important component in aircraft fuel systems for connecting fuel delivery lines between an engine and a fuel supply system. The main function of which is to ensure smooth delivery of fuel from the fuel tank to the engine to provide the power required by the aircraft. Aircraft engine oil delivery fittings are typically made of high strength, corrosion resistant materials such as stainless steel or titanium alloys. These materials can withstand high temperatures, high pressures and harsh flight environments, ensuring the reliability and safety of the joint. The design of the joint is also important to ensure that the fuel does not leak or become contaminated during the transfer process. Therefore, the joint generally adopts a structure with good sealing performance, such as an O-ring seal or a metal seal. In addition, aircraft engine oil delivery pipe joints are required to meet strict airworthiness standards and requirements, and are subjected to strict tests and inspections to ensure that the quality and performance of the aircraft engine oil delivery pipe joints meet regulations.
In the description of fig. 1, the oil delivery elbow joint component of the aircraft engine is made of titanium alloy, the elbow joint is required to be processed by using a blank formed by casting, in addition, the elbow joint is of an irregular nonstandard structure, the axes of pipelines at two ends of the elbow joint are not in a plane, and great difficulty is brought to batch precision machining of elbow joint blank castings in the aspects of self-fixing, part clamping, reference positioning and the like of a processing technology.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a processing method of an oil transportation elbow joint of an aircraft engine, solves the problems of large difficulty in batch precision processing of elbow joint blank castings in the aspects of self-fixing, part clamping, reference positioning and the like of a processing technology.
The invention is realized by the following technical scheme:
a processing method of an oil transportation elbow joint of an aircraft engine comprises the following steps:
step 1, performing three-dimensional scanning modeling on an elbow joint blank, and processing the elbow joint blank meeting the size requirement through size measurement of the model;
step 2, setting a first horizontal machining tool for primary machining of the elbow joint blank, wherein two first clamping hoops are arranged on the first horizontal machining tool and are respectively clamped at the inner side positions of the female joint and the male joint end of the elbow joint blank correspondingly, and an end machining station is reserved, so that after clamping, the axis of an end pipe of one end of the female joint of the elbow joint blank is kept in a horizontal state;
step 3, roughly machining the excircle and the end face of one end of a female joint of the elbow joint blank, and roughly machining the excircle and the end face of one end of a male joint of the elbow joint blank by taking the excircle and the end face of one end of the machined female joint as references;
step 4, setting a second vertical machining tool for machining the elbow joint, wherein two second clamping hoops are arranged on the second vertical machining tool, the lower second clamping hoops are clamped on the outer circle of one end of the machined male joint, the upper second clamping hoops are clamped at the neck position of one end of the machined female joint, the axis line of the pipe at the end of the female joint is kept in a vertical state, the outer circle part of the end is reserved, and finish machining is performed on the inner part and the outer part of the outer circle part;
and 5, setting a third vertical machining tool of the elbow joint, wherein two third clamping hoops are arranged on the third vertical machining tool, the lower third clamping hoops are clamped on the outer circle of one end of the machined female joint, and the upper third clamping hoops are clamped at the neck position of one end of the machined male joint, so that the axis line of the pipe at the male joint end is kept in a vertical state, the outer circle part of the pipe at the end is reserved, and the inner part and the outer part of the outer circle part are subjected to finish machining.
Further, the first clamping hoop of the first horizontal processing tool comprises a first half hoop and a first hoop base, and the first half hoop and the first hoop base form an inner hexahedral clamping opening to be clamped on the elbow joint blank.
Further, when the first horizontal machining tool is used for clamping, a first clamping hoop at one end of the female joint is clamped, so that the axis of the head pipe at one end of the female joint of the bent pipe joint blank after clamping is in a horizontal state; and then clamping the first clamping anchor ear at one end of the male connector.
Further, the rough machining of the female joint and the male joint of the elbow joint blank adopts a five-axis linkage numerical control machining center for machining.
Furthermore, the clamping limit space of the second clamping hoop at the lower side of the second vertical machining tool is matched with the machined male connector structure of the elbow connector blank, and the second clamping hoop at the lower side is clamped on the outer circle of one end of the machined male connector so that the axial lead of a circular tube at one end of the female connector is kept in a vertical state.
Furthermore, when the second vertical machining tool is clamped, the second clamping hoop at the lower side of the tool is clamped on the machined excircle at one end of the male connector, so that the axis of the round tube at one end of the female connector is kept in a vertical state, and the second clamping hoop at the upper side of one end of the female connector is clamped, so that the bent pipe connector blank is clamped fixedly.
Further, when the second vertical machining tool is adopted to clamp the female joint end of the numerical control lathe, a first clamping shaft coaxial with the female joint pipe part is movably arranged on a first clamping supporting bottom plate of the second vertical machining tool and clamped on the numerical control lathe through the first clamping shaft.
The middle part of the bottom surface of the first clamping support bottom plate is provided with a clamping shaft jack with a female joint pipe part coaxial, a plurality of connecting plates are arranged on the first clamping shaft and around the connecting end part of the first clamping support bottom plate, and the connecting plates are connected to the first clamping support bottom plate through bolts; the other end of the first clamping shaft is provided with a conical hole;
when the coaxiality of the first clamping shaft and the pipe part of the female joint is required to be calibrated, the bent pipe joint blank is fixedly clamped on the second vertical machining tool, the first clamping shaft is initially connected on the second vertical machining tool through a bolt, the female joint of the bent pipe joint blank is clamped on the numerical control lathe, the taper hole on the first clamping shaft is pressed by the ejector pin, the first clamping shaft is coaxial with the pipe part of the female joint, and then the bolt is fastened, so that the first clamping shaft is firmly connected on the second vertical machining tool.
Furthermore, the clamping limit space of the third clamping hoop at the lower side of the third vertical machining tool is matched with the machined female joint structure of the elbow joint blank, and the third clamping hoop at the lower side is clamped on the outer circle of one end of the machined female joint so that the axial lead of the circular tube at one end of the male joint is kept in a vertical state.
Furthermore, when the third vertical machining tool is clamped, the lower side third clamping hoop of the tool is clamped on the machined excircle at one end of the female connector, so that the axis of the round tube at one end of the male connector is kept in a vertical state, and the upper side third clamping hoop at one end of the male connector is clamped, so that the elbow connector blank is clamped fixedly.
Further, when the third vertical machining tool is adopted to clamp the male joint end of the numerical control lathe for finish machining, a second clamping shaft coaxial with the male joint pipe part is movably arranged on a second clamping supporting bottom plate of the third vertical machining tool, and the second clamping shaft is clamped on the numerical control lathe.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the processing method of the oil transportation elbow joint of the aircraft engine, the first horizontal processing tool, the second vertical processing tool and the third vertical processing tool are respectively designed according to the processing structural characteristics of the elbow joint, and the processing difficulty of the non-standard elbow joint is solved by respectively correspondingly processing different structural parts of the elbow joint through the three sets of tools.
2. The invention relates to a method for processing an oil transportation elbow joint of an aircraft engine, which realizes batch processing production of the elbow joint, and has the advantages that the processing cost of the elbow joint must be considered, compared with the processing cost of a five-axis linkage numerical control processing center, the processing cost of equipment with low cost is reduced as much as possible, and the method is also a problem to be considered.
3. The invention relates to a processing method of an oil transportation elbow joint of an aircraft engine, which is characterized in that the processing technology of the elbow joint is designed, and blank pieces of the elbow joint are not processed to refer to processing references.
4. According to the method for machining the oil transportation elbow joint of the aircraft engine, when the female joint and the male joint of the elbow joint blank are precisely machined by using a numerical control lathe, the female joint or the male joint corresponding to the first clamping shaft or the second clamping shaft is required to keep coaxiality, the clamping shaft and the machining joint are arranged on two sides of a supporting bottom plate in a movable mode and correspond to different machining equipment, and the space positions of the corresponding female joint or male joint of each elbow joint blank are different when the elbow joint blank is clamped, so that the coaxiality of the clamping shaft and the machining joint needs to be calibrated each time;
the invention solves the problems creatively by reversely thinking and calibrating the positions of the corresponding clamping shafts on the numerical control lathe through the positions of the female joint and the male joint of the elbow joint blank.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:
fig. 1 is a schematic perspective view of an elbow joint according to the present invention.
FIG. 2 is a schematic cross-sectional view of an elbow joint of the present invention.
Fig. 3 is a schematic view 1 of a clamping structure of a first horizontal machining tool and an elbow joint blank.
Fig. 4 is a schematic diagram 2 of a clamping structure of a first horizontal machining tool and an elbow joint blank.
Fig. 5 is a schematic view of a base structure of the first horizontal processing tool according to the present invention.
FIG. 6 is a schematic view of the structure of a finished rough elbow joint blank of the present invention.
Fig. 7 is a schematic view 1 of a clamping structure of a second vertical machining tool and an elbow joint blank.
Fig. 8 is a schematic diagram 2 of a clamping structure of a second vertical machining tool and an elbow joint blank of the present invention.
Fig. 9 is a schematic view of a base structure of a second vertical machining tool according to the present invention.
Fig. 10 is a schematic structural diagram of a second vertical machining tool connected to a first clamping shaft.
Fig. 11 is a schematic view 1 of a clamping structure of a third vertical machining tool and an elbow joint blank.
Fig. 12 is a schematic view 2 of a clamping structure of a third vertical machining tool and an elbow joint blank according to the present invention.
Fig. 13 is a schematic view of a base structure of a third vertical machining tool according to the present invention.
Fig. 14 is a schematic structural view of a third vertical machining tool according to the present invention connected to a second clamping shaft.
In the drawings, the reference numerals and corresponding part names:
the device comprises a 1-elbow joint blank, a 2-first horizontal machining tool, a 3-first clamping hoop, a 4-female joint, a 5-male joint, a 6-elbow joint, a 7-second vertical machining tool, an 8-second clamping hoop, a 9-neck position, a 10-third vertical machining tool, an 11-third clamping hoop, a 12-first half hoop, a 13-first hoop base, a 14-first clamping support bottom plate, a 15-first clamping shaft, a 16-second clamping support bottom plate, a 17-second clamping shaft, a 18-clamping shaft jack, a 19-connecting plate, a 20-bolt, a 21-conical hole, a 22-connecting ring groove, a 23-limiting groove, a 24-radial through hole, a 25-connecting ring and a 26-clamping groove.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present invention and simplifying the description, rather than indicating or implying that the apparatus or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limiting the present invention, and that the specific meanings of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.
In the description of the present invention, unless explicitly stated and limited otherwise, the term "coupled" or the like should be interpreted broadly, as it may be fixedly coupled, detachably coupled, or integrally formed, as indicating the relationship of components; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two parts or interaction relationship between the two parts. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
As shown in fig. 1-14, the method for processing the oil delivery elbow joint of the aircraft engine is shown in fig. 1, and is characterized in that the oil delivery elbow joint of the aircraft engine is made of titanium alloy material, the elbow joint is required to be processed by using a casting blank, in addition, the elbow joint is of an irregular nonstandard structure, the pipeline axes of joints at two ends of the elbow joint are not in a plane, one end of the elbow joint 6 is a female joint 4 of an oil delivery pipeline of the aircraft engine, the other end of the elbow joint is a male joint 5, when the aircraft engine is installed and used, the elbow joint is connected to a pipeline through the female joint 4 first, then is connected to another pipeline through the male joint 5, in the aspect of processing the female joint 4, the inner circle and the end face of a round pipe of the female joint 4 are required to be processed, a connecting ring groove 22 is required to be processed in an inner cylinder, an axial limit groove 23 is processed in the inner cylinder, and a radial through hole 24 is drilled at a position corresponding to the limit groove 23; in the processing of the male connector 5, it is necessary to process the inner and outer circles and the end faces of the circular tube of the male connector 5, process the connecting ring 25 on the inner side of the outer cylinder, and process a plurality of clamping grooves 26 around the elbow connector 6 on the bottom of the outer cylinder. And scientifically designing a processing technology and corresponding processing equipment according to the processing characteristics of each part.
The invention relates to a method for processing oil delivery elbow joints of aircraft engines, which is used for precisely processing the elbow joints 6 in batches and comprises the following steps:
step 1, performing three-dimensional scanning modeling on an elbow joint blank 1, and processing the elbow joint blank 1 meeting the size requirement through size measurement of the model; by analyzing the model size and the shape structure of the elbow joint blank 1, the machining requirement of the elbow joint 6 is met, and the next machining is performed.
Step 2, rough machining, namely setting a first horizontal machining tool 2 for primary machining of the elbow joint blank 1, wherein two first clamping hoops 3 are arranged on the first horizontal machining tool 2, the two first clamping hoops 3 are correspondingly clamped at the inner side positions of the end parts of the female joint 4 and the male joint 5 of the elbow joint blank 1 respectively, and an end machining station is reserved, so that after clamping, the axial line of the end pipe of the end part of the female joint 4 of the elbow joint blank 1 is kept in a horizontal state; taking one end of the female connector 4 as a processing reference;
step 3, roughly machining the excircle and the end face of one end of the female joint 4 of the elbow joint blank 1, and roughly machining the excircle and the end face of one end of the male joint 5 of the elbow joint blank 1 by taking the excircle and the end face of one end of the machined female joint 4 as references; because the clamping position of the first horizontal machining tool 2 is limited, only a small section of outer circle head is required to be machined at the ends of the female connector 4 and the male connector 5 and used as a subsequent finish machining reference and a clamping position; when the first horizontal processing tool 2 is clamped, a first clamping hoop 3 at one end of the female joint 4 is clamped, so that the axis of the head pipe at one end of the female joint 4 of the bent pipe joint blank 1 is kept in a horizontal state; and then the first clamping hoop 3 is clamped at one end of the male connector 5. The end part rough machining of the female joint 4 and the male joint 5 of the elbow joint blank 1 is performed by adopting a five-axis linkage numerical control machining center. As shown in fig. 6, the rough machined elbow joint blank 1 is schematically structured.
Step 4, setting a second vertical machining tool 7 for machining the elbow joint 6, wherein two second clamping hoops 8 are arranged on the second vertical machining tool 7, the lower second clamping hoops 8 are clamped on the outer circle of one end of the machined male joint 5, the upper second clamping hoops 8 are clamped at the neck position 9 of one end of the machined female joint 4, the axial line of the pipe at the end of the female joint 4 is kept in a vertical state, the outer circle part of the end is reserved, and finish machining is carried out on the inner side and the outer side of the outer circle part; when the second vertical machining tool 7 is clamped, the second clamping hoop 8 at the lower side of the tool is clamped firstly, and is clamped on the machined excircle at one end of the male connector 5, so that the axis of a circular tube at one end of the female connector 4 is kept in a vertical state, and the second clamping hoop 8 at the upper side of one end of the female connector 4 is clamped, so that the elbow connector blank 1 is clamped fixedly.
When the second vertical machining tool 7 is clamped at the end of the female joint 4 of the numerical control lathe, a first clamping shaft 15 coaxial with the pipe part of the female joint 4 is movably arranged on a first clamping supporting bottom plate 14 of the second vertical machining tool 7, and the first clamping shaft 15 is clamped on the numerical control lathe.
And 5, setting a third vertical machining tool 10 of the elbow joint 6, wherein two third clamping hoops 11 are arranged on the third vertical machining tool 10, the lower third clamping hoops 11 are clamped on the outer circle of one end of the machined female joint 4, and the upper third clamping hoops 11 are clamped at the neck position 9 of one end of the machined male joint 5, so that the axial line of the pipe end of the male joint 5 is kept in a vertical state, the outer circle part of the end is reserved, and the inner and outer parts of the outer circle part are finished. When the third vertical machining tool 10 is clamped, the lower side third clamping hoop 11 of the tool is clamped firstly, the clamping hoop is clamped on the machined excircle at one end of the female connector 4, the axis of a circular tube at one end of the male connector 5 is kept in a vertical state, and then the upper side third clamping hoop 11 at one end of the male connector 5 is clamped, so that the elbow connector blank 1 is clamped fixedly.
When the third vertical machining tool 10 is clamped at the end of the male connector 5 of the numerical control lathe for finish machining, a second clamping shaft 17 coaxial with the pipe part of the male connector 5 is movably arranged on a second clamping supporting bottom plate 16 of the third vertical machining tool 10, and the second clamping shaft 17 is clamped on the numerical control lathe.
According to the method for processing the oil transportation elbow joint of the aircraft engine, the first horizontal processing tool 2, the second vertical processing tool 7 and the third vertical processing tool 10 are respectively designed according to the processing structural characteristics of the elbow joint 6, and the processing difficulty of the non-standard elbow joint 6 is solved by respectively correspondingly processing different structural parts of the elbow joint 6 through three sets of tools.
The invention designs a clamping shaft corresponding to a second vertical processing tool 7 and a third vertical processing tool 10 on the tool, and clamps the clamping shaft on a numerical control lathe, so that the machining cost of a turning circle, a boring hole and a ring groove on the machined end parts of a female connector 4 and a male connector 5 can be machined through the numerical control lathe, the machining cost is greatly reduced, and the machining efficiency is improved.
The invention reasonably selects the machining datum plane or datum line of the elbow joint 6 and the design of the selection of clamping positions by matching with three sets of tools, solves the problem of great difficulty in mass precision machining of elbow joint blank castings in the aspects of self-determination of the machining process, clamping of parts, datum positioning and the like.
Example 2
On the basis of the above embodiment, as shown in fig. 3-5, the first horizontal machining tool 2 can only be used as machining center equipment or electrode machining equipment for machining, is a structural schematic diagram of the first horizontal machining tool 2, mainly comprises a tool base, is of a pentagonal plate-shaped structure, cuts off one corner through a square plate, mainly aims at preventing interference with a turning tool when machining an elbow joint blank 1, comprises two sets of first clamping hoops 3, each set of first clamping hoops 3 comprises a first half hoop 12 and a first hoops base 13, the two sets of first clamping hoops 3 are basically identical in structure, one set of first clamping hoops 3 are aligned with corner edges of a unfilled corner, and the other set of first clamping hoops 3 are aligned with a corresponding edge of the unfilled corner.
The first clamping hoop 3 of the first horizontal machining tool 2 comprises a first half hoop 12 and a first hoop base 13, and the first half hoop 12 and the first hoop base 13 form an inner six-face type holding opening to hold the elbow joint blank 1. The six-sided holding opening surface in the first clamping hoop 3 which is correspondingly arranged on the corner line is inclined inwards and is arranged in order to match with the clamping structure of the male connector 5 of the elbow joint blank 1. The inner hexahedral holding openings are mainly arranged to be contacted with the elbow joint blank 1 through a plurality of inner surfaces, so that the elbow joint blank 1 is convenient to firmly clamp, the appearance structure of the elbow joint blank 1 is irregular, and the design is due.
When the first horizontal processing tool 2 is clamped, a first clamping hoop 3 at one end of the female joint 4 is clamped, so that the axis of the head pipe at one end of the female joint 4 of the bent pipe joint blank 1 is kept in a horizontal state; and then the first clamping hoop 3 is clamped at one end of the male connector 5. The end part rough machining of the female joint 4 and the male joint 5 of the elbow joint blank 1 is performed by adopting a five-axis linkage numerical control machining center.
When the two ends of the elbow joint blank 1 are subjected to rough machining, the ends of the female joint 4 and the male joint 5 are machined through a five-axis linkage numerical control machining center, the axis level of the end cylinder of the female joint 4 is set as a reference through a machining program of the five-axis linkage numerical control machining center, a small section of the female joint 4 and the male joint 5 is roughly machined as a subsequent machining reference, and the end faces of the ends of the female joint 4 and the male joint 5 are machined through machining forming setting and are also used as reference surfaces for subsequent finish machining.
Example 3
On the basis of the above embodiment, as shown in fig. 7-10, the second vertical machining tool 7 can be suitable for machining by a machining center, a lathe and electrode machining equipment, the basic structure of the second vertical machining tool 7 takes the first clamping supporting bottom plate 14 as a horizontal reference, the first clamping supporting bottom plate 14 is provided with a hoop seat of the second clamping hoop 8, the size and the structure of the machined end of the male connector 5 are confidential and matched with the inner groove of the hoop seat, because the second clamping hoop 8 is the clamping reference of the second vertical machining tool 7, the notch surface is larger and needs to bear the main weight of the bent connector blank 1, the matched half hoop of the opposite hoop seat plays a role of clasping, the two are connected through a bolt, a vertical frame for supporting an upper side second clamping hoop 8 is arranged on one side of a first clamping supporting bottom plate 14, the upper side second clamping hoop 8 is horizontally arranged and connected on the vertical frame, the upper side second clamping hoop 8 mainly plays a role in fixing and is matched with a neck position 9 of one end of a female joint 4 on an elbow joint blank 1, the neck position 9 is a non-machining position, the size cannot be standardized, and therefore cannot be precisely matched, and a clamping limiting space of the lower side second clamping hoop 8 of a second vertical machining tool 7 is matched with a machined male joint 5 structure of the elbow joint blank 1, and the lower side second clamping hoop 8 is clamped on the outer circle of one end of the machined male joint 5 to enable the axis line of one end of the female joint 4 to be in a vertical state.
When the second vertical machining tool 7 is clamped, the second clamping hoop 8 at the lower side of the tool is clamped firstly, and is clamped on the machined excircle at one end of the male connector 5, so that the axis of a circular tube at one end of the female connector 4 is kept in a vertical state, and the second clamping hoop 8 at the upper side of one end of the female connector 4 is clamped, so that the elbow connector blank 1 is clamped fixedly.
As shown in fig. 10, when the second vertical machining tool 7 is used to clamp the end of the female joint 4 on the numerically controlled lathe, a first clamping shaft 15 coaxial with the pipe portion of the female joint 4 is movably provided on a first clamping support base plate 14 of the second vertical machining tool 7, and clamped on the numerically controlled lathe by the first clamping shaft 15.
The middle part of the bottom surface of the first clamping support bottom plate 14 is provided with a clamping shaft jack 18 with the coaxial pipe part of the female connector 4, the connecting end part of the first clamping shaft 15 connected with the first clamping support bottom plate 14 is provided with a plurality of connecting plates 19 in a surrounding way, and the connecting plates 19 are connected to the first clamping support bottom plate 14 through bolts 20; the other end of the first clamping shaft 15 is provided with a conical hole 21; the bolt 20 is matched with the connecting plate 19 to reserve a certain allowance, so that the primary fixing is facilitated. The coaxiality is adjusted and then completely fixed.
When the coaxiality of the first clamping shaft 15 and the pipe part of the female joint 4 is required to be calibrated, the bent pipe joint blank 1 is fixedly clamped on the second vertical machining tool 7, the first clamping shaft 15 is initially connected on the second vertical machining tool 7 through the bolt 20, the female joint 4 of the bent pipe joint blank 1 is clamped on a numerical control lathe, the taper hole 21 on the first clamping shaft 15 is pressed through the ejector pin, the first clamping shaft 15 and the pipe part of the female joint 4 are coaxial, and then the bolt 20 is fastened, so that the first clamping shaft 15 is firmly connected on the second vertical machining tool 7.
When the second vertical machining tool 7 is used for machining in a machining center or electrode machining equipment, the first clamping shaft 15 is removed, and the first clamping support bottom plate 14 is fixed on a machining table of the machining equipment.
When a numerical control lathe is used for precisely machining a female joint 4 and a male joint 5 of an elbow joint blank 1, coaxiality of the female joint 4 or the male joint 5 corresponding to a first clamping shaft 15 or a second clamping shaft 17 is required to be maintained, the clamping shafts and the machining joints are arranged on two sides of a supporting bottom plate and are movably arranged corresponding to different machining equipment, and the space positions of the corresponding female joint 4 or male joint 5 are different when each elbow joint blank 1 is clamped, so that coaxiality of the clamping shafts and the machining joints needs to be calibrated each time;
the invention solves the problems creatively by reversely thinking and calibrating the positions of the corresponding clamping shafts on the numerical control lathe through the positions of the female joint 4 and the male joint 5 of the elbow joint blank 1.
Example 4
On the basis of the above embodiment, as shown in fig. 11-13, the structure principle of the third vertical machining tool 10 is the same as that of the second vertical machining tool 7, except that the size and the position of the clamping anchor ear are slightly changed, the clamping limit space of the third clamping anchor ear 11 at the lower side of the third vertical machining tool 10 is matched with the structure of the machined female joint 4 of the elbow joint blank 1, and the third clamping anchor ear 11 at the lower side is clamped on the outer circle of one end of the machined female joint 4 to keep the axial lead of the round pipe at one end of the male joint 5 in a vertical state.
When the third vertical machining tool 10 is clamped, the lower side third clamping hoop 11 of the tool is clamped firstly, the clamping hoop is clamped on the machined excircle at one end of the female connector 4, the axis of a circular tube at one end of the male connector 5 is kept in a vertical state, and then the upper side third clamping hoop 11 at one end of the male connector 5 is clamped, so that the elbow connector blank 1 is clamped fixedly.
When the third vertical machining tool 10 is clamped at the end of the male connector 5 of the numerical control lathe for finish machining, a second clamping shaft 17 coaxial with the pipe part of the male connector 5 is movably arranged on a second clamping supporting bottom plate 16 of the third vertical machining tool 10, and the second clamping shaft 17 is clamped on the numerical control lathe.
As shown in fig. 14, a clamping shaft insertion hole 18 coaxial with the pipe portion of the male connector 5 is provided in the middle of the bottom surface of the second clamping support bottom plate 16, a plurality of connection plates 19 are provided on the second clamping shaft 17 and around the connection end portion of the second clamping support bottom plate 16, and the connection plates 19 are connected to the second clamping support bottom plate 16 by bolts 20; the other end of the second clamping shaft 17 is provided with a conical hole 21;
when the coaxiality of the second clamping shaft 17 and the pipe part of the male connector 5 is required to be calibrated, the elbow connector blank 1 is fixedly clamped on the third vertical machining tool 10, the second clamping shaft 17 is initially connected on the third vertical machining tool 10 through the bolt 20, the male connector 5 of the elbow connector blank 1 is clamped on a numerical control lathe, the second clamping shaft 17 and the pipe part of the male connector 5 are coaxial through the conical hole 21 on the ejector pin ejecting and pressing the second clamping shaft 17, and then the bolt 20 is fastened, so that the second clamping shaft 17 is firmly connected on the third vertical machining tool 10.
When a numerical control lathe is used for precisely machining a female joint 4 and a male joint 5 of an elbow joint blank 1, coaxiality of the female joint 4 or the male joint 5 corresponding to a first clamping shaft 15 or a second clamping shaft 17 is required to be maintained, the clamping shafts and the machining joints are arranged on two sides of a supporting bottom plate and are movably arranged corresponding to different machining equipment, and the space positions of the corresponding female joint 4 or male joint 5 are different when each elbow joint blank 1 is clamped, so that coaxiality of the clamping shafts and the machining joints needs to be calibrated each time;
the invention solves the problems creatively by reversely thinking and calibrating the positions of the corresponding clamping shafts on the numerical control lathe through the positions of the female joint 4 and the male joint 5 of the elbow joint blank 1.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The processing method of the oil transportation elbow joint of the aircraft engine is characterized by comprising the following steps:
step 1, performing three-dimensional scanning modeling on an elbow joint blank (1), and processing the elbow joint blank (1) meeting the size requirement through size measurement of the model;
step 2, setting a first horizontal machining tool (2) for primary machining of an elbow joint blank (1), wherein two first clamping hoops (3) are arranged on the first horizontal machining tool (2), the two first clamping hoops (3) are respectively clamped at inner side positions of the end parts of a female joint (4) and a male joint (5) of the elbow joint blank (1) correspondingly, and an end machining station is reserved, so that after clamping, one end pipe axis of the female joint (4) of the elbow joint blank (1) is kept in a horizontal state;
step 3, roughly machining one end excircle and end face of a female joint (4) of the elbow joint blank (1), and roughly machining one end excircle and end face of a male joint (5) of the elbow joint blank (1) by taking the machined one end excircle and end face of the female joint (4) as references;
step 4, setting a second vertical machining tool (7) for machining an elbow joint (6), wherein two second clamping hoops (8) are arranged on the second vertical machining tool (7), the lower second clamping hoops (8) are clamped on the outer circle of one end of a machined male joint (5), the upper second clamping hoops (8) are clamped at the neck position (9) of one end of a machined female joint (4), the axial line of the end tube of the female joint (4) is kept in a vertical state, the outer circle part of the end machining is reserved, and finish machining is performed on the inner part and the outer part of the outer circle part;
and 5, setting a third vertical machining tool (10) of the elbow joint (6), wherein two third clamping hoops (11) are arranged on the third vertical machining tool (10), the lower third clamping hoops (11) are clamped on the outer circle of one end of the machined female joint (4), and the upper third clamping hoops (11) are clamped at the neck position (9) of one end of the machined male joint (5), so that the axial line of the pipe at the end of the male joint (5) is kept in a vertical state, the outer circle part of the end to be machined is reserved, and the inner part and the outer part of the outer circle part are subjected to finish machining.
2. The method for processing the oil delivery elbow joint of the aircraft engine according to claim 1, wherein the method comprises the following steps: the first clamping hoop (3) of the first horizontal machining tool (2) comprises a first half hoop (12) and a first hoop base (13), and the first half hoop (12) and the first hoop base (13) form an inner hexahedral clamping opening to clamp the elbow joint blank (1).
3. The method for processing the oil delivery elbow joint of the aircraft engine according to claim 2, wherein the method comprises the following steps: when the first horizontal processing tool (2) is clamped, a first clamping hoop (3) at one end of the female connector (4) is clamped, so that the axis of the head pipe of one end of the female connector (4) of the clamped elbow connector blank (1) is kept in a horizontal state; and then the first clamping anchor ear (3) is clamped at one end of the male connector (5).
4. A method of processing an aircraft engine oil delivery elbow according to any one of claims 1-3, wherein: the end roughing of the female joint (4) and the male joint (5) of the elbow joint blank (1) is processed by adopting a five-axis linkage numerical control machining center.
5. The method for processing the oil delivery elbow joint of the aircraft engine according to claim 1, wherein the method comprises the following steps: the clamping limit space of the second clamping hoop (8) at the lower side of the second vertical machining tool (7) is matched with the machined male connector (5) of the elbow connector blank (1) in structure, and the second clamping hoop (8) at the lower side is clamped on the excircle of one end of the machined male connector (5) to enable the axis of a circular tube at one end of the female connector (4) to be in a vertical state.
6. The method for processing the oil delivery elbow joint of the aircraft engine according to claim 5, wherein the method comprises the following steps: when the second vertical machining tool (7) is clamped, the second clamping hoop (8) at the lower side of the tool is clamped firstly, and is clamped on the machined excircle at one end of the male connector (5), so that the axis of a round tube at one end of the female connector (4) is kept in a vertical state, and the second clamping hoop (8) at the upper side of one end of the female connector (4) is clamped, so that the elbow connector blank (1) is clamped fixedly.
7. The method for processing the oil delivery elbow joint of the aircraft engine according to claim 6, wherein the method comprises the following steps: when the second vertical machining tool (7) is adopted to clamp the end of the female joint (4) of the numerical control lathe, a first clamping shaft (15) coaxial with the pipe part of the female joint (4) is movably arranged on a first clamping supporting bottom plate (14) of the second vertical machining tool (7), and the female joint is clamped on the numerical control lathe through the first clamping shaft (15);
the middle part of the bottom surface of the first clamping support bottom plate (14) is provided with a clamping shaft jack (18) with a female joint (4) and a coaxial pipe part, the connecting end part of the first clamping shaft (15) connected with the first clamping support bottom plate (14) is circumferentially provided with a plurality of connecting plates (19), and the connecting plates (19) are connected to the first clamping support bottom plate (14) through bolts (20); the other end of the first clamping shaft (15) is provided with a conical hole (21);
when the coaxiality of the pipe part of the first clamping shaft (15) and the female joint (4) needs to be calibrated, the elbow joint blank (1) is fixedly clamped on the second vertical machining tool (7), the first clamping shaft (15) is initially connected to the second vertical machining tool (7) through the bolt (20), the female joint (4) of the elbow joint blank (1) is clamped on a numerical control lathe, the taper hole (21) on the first clamping shaft (15) is pressed through the ejector pin, the first clamping shaft (15) is coaxial with the pipe part of the female joint (4), and then the bolt (20) is fastened, so that the first clamping shaft (15) is firmly connected to the second vertical machining tool (7).
8. The method for processing the oil delivery elbow joint of the aircraft engine according to claim 1, wherein the method comprises the following steps: the clamping limit space of the third clamping hoop (11) at the lower side of the third vertical machining tool (10) is matched with the machined female joint (4) of the elbow joint blank (1) in structure, and the third clamping hoop (11) at the lower side is clamped on the outer circle of one end of the machined female joint (4) to enable the axis of a circular tube at one end of the male joint (5) to be kept in a vertical state.
9. The method for processing the oil delivery elbow joint of the aircraft engine according to claim 8, wherein the method comprises the following steps: when the third vertical machining tool (10) is clamped, the lower side third clamping hoop (11) of the tool is clamped firstly, the clamping hoop is clamped on the machined outer circle at one end of the female connector (4), the axis of a circular tube at one end of the male connector (5) is kept in a vertical state, and then the upper side third clamping hoop (11) at one end of the male connector (5) is clamped, so that the elbow connector blank (1) is clamped fixedly.
10. The method for processing the oil delivery elbow joint of the aircraft engine according to claim 9, wherein the method comprises the following steps: when the third vertical machining tool (10) is adopted to clamp the end of the male connector (5) of the numerical control lathe finish machining, a second clamping shaft (17) coaxial with the pipe part of the male connector (5) is movably arranged on a second clamping support bottom plate (16) of the third vertical machining tool (10), and the second clamping shaft (17) is clamped on the numerical control lathe;
the middle part of the bottom surface of the second clamping support bottom plate (16) is provided with a clamping shaft jack (18) with a coaxial male joint (5) pipe part, a plurality of connecting plates (19) are arranged on the second clamping shaft (17) and around the connecting end part of the second clamping support bottom plate (16), and the connecting plates (19) are connected to the second clamping support bottom plate (16) through bolts (20); the other end of the second clamping shaft (17) is provided with a conical hole (21);
when the coaxiality of the pipe part of the second clamping shaft (17) and the male connector (5) is required to be calibrated, the elbow connector blank (1) is fixedly clamped on the third vertical machining tool (10), the second clamping shaft (17) is initially connected to the third vertical machining tool (10) through a bolt (20), the male connector (5) of the elbow connector blank (1) is clamped on a numerical control lathe, the second clamping shaft (17) is enabled to be coaxial with the pipe part of the male connector (5) through a conical hole (21) in the ejector pin jacking mode, and then the bolt (20) is fastened, so that the second clamping shaft (17) is firmly connected to the third vertical machining tool (10).
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