CN109048368A - A kind of semienclosed slot processing method of abnormally-structured part - Google Patents
A kind of semienclosed slot processing method of abnormally-structured part Download PDFInfo
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- CN109048368A CN109048368A CN201811033934.XA CN201811033934A CN109048368A CN 109048368 A CN109048368 A CN 109048368A CN 201811033934 A CN201811033934 A CN 201811033934A CN 109048368 A CN109048368 A CN 109048368A
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- Prior art keywords
- electrode
- abnormally
- processing method
- type face
- slot
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Classifications
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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
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/04—Electrodes specially adapted therefor or their manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
Abstract
A kind of semienclosed slot processing method of abnormally-structured part, comprising the following steps: step 1 rough mills the type face slot for leading electrode according to fluting size to slotting position in engine mounting rail；Step 2 by jacking electrode according to groove depth carries out cutting jacking on the type face slot rough milled out straight down；Step 3 is integrally cut off the part that overlaying processing goes out using cutting electrode；Section is processed as required R type face by R type face electrode by step 4；Step 5 carries out finish-milling to groove face and examines, and completes the processing of engine mounting rail abnormal shape semienclosed slot.The present invention can be avoided the use that a large amount of expensive machines add cutter, and the processing efficiency of difficult working special-shaped structural member is greatly improved, it solves and allows knife, the problems such as forging a knife in processing, ensure that the processing quality of part, meet the processing request of big-block engine mounting rail abnormal shape semienclosed slot.
Description
Technical field
The invention belongs to critical aircraft engine parts manufacture fields, and in particular to a kind of semienclosed slot of abnormally-structured part adds
Work method.
Background technique
Mounting rail is one of the important part of engine suspension centre component, and the power usually carried, moment of flexure, torque are all very
Greatly, shape is more complex, and dimensional accuracy and geometric tolerance grade will reach IT4~IT5, and the requirement of surface roughness is also very high
(Ra1.6 or more), while mounting rail part uses open die forgings to be processed as blank, machine adds removal quantity of material very big.
Since part material is unmanageable high-temperature alloy material, part difficulty of processing is big and the period is long, especially
Special-shaped semi-enclosed slot processing, structure are thin-walled and complicated muscle structure, and the characteristic of part processing is weak rigidity, using conventional milling
It cuts processing and carries out roughing, it may appear that process flutter and deform serious problem.Original process protocol procedures are rough milled for Milling Machining
Then type chamber is finished by inserting the thick open form chamber of milling cutter with alloy milling cutter.Since part is deeper cavity structure, warp
It crosses and milling roughing is inserted to part die cavity, when being finished, the processing efficiency of part can not be substantially improved, and part material
It is special to expect, the requirement to cutter is just very stringent, can largely consume cutter, therefore part processing economy is very poor.
Summary of the invention
It is an object of the invention to be directed to above-mentioned the problems of the prior art, a kind of the semiclosed of abnormally-structured part is provided
Groove processing method, improves the processing efficiency of difficult working special-shaped structural member, and can guarantee the processing quality of part.
To achieve the goals above, the technical solution adopted by the present invention the following steps are included:
Step 1 rough mills the type face slot for leading electrode according to fluting size to slotting position in engine mounting rail；
Step 2 by jacking electrode according to groove depth carries out cutting jacking on the type face slot rough milled out straight down；
Step 3 is integrally cut off the part that overlaying processing goes out using cutting electrode；
Section is processed as required R type face by R type face electrode by step 4；
Step 5 carries out finish-milling to groove face and examines, and completes the processing of engine mounting rail abnormal shape semienclosed slot.
The material of the engine mounting rail is GH4169, hardness HB >=346 after solid solution aging.
The working depth of the slot of type face described in step 1 is 1.8mm~2.2mm.
Jacking electrode described in step 2 is cut to root R type face and side the tangent straight down.
The cutter for carrying out finish-milling to groove face described in step 5 uses the six sword alloy milling cutter made of k44 material, and cutter is complete
A length of 150mm, a length of 80mm of sword, tool orthogonal rake are 10 °, and tool clearance is 15 °, and cutter spiral angle is 35 °.
The jacking electrode uses annular electrode, and cutting profile is identical as cross sectional shape needed for fluting.
The jacking electrode, cutting electrode, R type face electrode are mounted on EP-50 electric discharge machine and are processed, electric spark
The input current of machine is 10A, and inter-train pause is 1 μ s, and pulse width is 5 μ s.
The step 5 is successively divided into roughing and finishing when carrying out finish-milling to groove face:
Revolving speed when roughing is 500r/min, cutting depth 1mm, feed speed 60mm/min, is turned when finishing
Speed is 700r/min, cutting depth 0.5mm, feed speed 100mm/min.
Compared with prior art, the present invention is directed to the polymorphic structure and the unmanageable characteristic of material of engine mounting rail,
The type face slot for leading electrode is rough milled first, cutting jacking is then carried out by jacking electrode, then will cover using cutting electrode
Expect that the part processed is integrally cut off, finally goes out R type face using R type face electrode machining to get required semienclosed slot is arrived, to slot
Face carries out finish-milling and examines, and completes the processing of engine mounting rail abnormal shape semienclosed slot.Milling Machining mode used by previous is held
Easily there is asymmetric cutting and flutter causes part deformation, keeps the machining accuracy of part unstable, the present invention can be avoided largely
Expensive machine adds the use of cutter, and the processing efficiency of difficult working special-shaped structural member is greatly improved, and solves and allows in processing
Knife, the problems such as forging a knife, ensure that the processing quality of part, the processing for meeting big-block engine mounting rail abnormal shape semienclosed slot is wanted
It asks.
Further, jacking electrode of the present invention, cutting electrode, R type face electrode are mounted on EP-50 electric discharge machine and are added
Work, the input current of electric discharge machine are 10A, and inter-train pause is 1 μ s, and pulse width is 5 μ s, are successively divided when carrying out finish-milling to groove face
For roughing and finishing, revolving speed when roughing is 500r/min, cutting depth 1mm, feed speed 60mm/min, finishing
The revolving speed in working hour is 700r/min, cutting depth 0.5mm, feed speed 100mm/min, and electric spark machine parameter setting makes
It obtains part unit time removal rate and reaches maximum.Part cutting parameter is rough milled, ensure that part is high in machining efficiency, cutter uses the longevity
Order optimal, finish-milling cutting parameter makes machined surface quality optimal, dimensionally stable.
Detailed description of the invention
The semienclosed slot schematic three dimensional views of Fig. 1 engine mounting rail；
Fig. 2 type face slot of the present invention rough mills position front view；
Fig. 3 type face slot of the present invention rough mills position top view；
The front view of Fig. 4 jacking electrode of the present invention；
The top view of Fig. 5 jacking electrode of the present invention；
The schematic three dimensional views of Fig. 6 nest cutting of the present invention；
The top view of Fig. 7 cutting electrode of the present invention；
The front view of Fig. 8 cutting electrode of the present invention；
The schematic three dimensional views that Fig. 9 present invention integrally cuts off the part that overlaying processing goes out；
The top view of Figure 10 R type of the present invention face electrode；
The left view of Figure 11 R type of the present invention face electrode；
The front view of Figure 12 R type of the present invention face electrode.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawing.
Referring to Fig. 1, the semienclosed slot processing method of the abnormally-structured part of the present invention, comprising the following steps:
(1) according to Fig. 4-5,7-8,10-12 production jacking electrode, cutting electrode and R type face electrode；
(2) clamping and centering of fixture；In on fixture bolt and pressing plate installation in machining center, centering fixture is positioned
The heart and angular position are not more than 0.03mm, compress.
(3) the clamping centering of part；
By part positioning and clamping, it is installed on fixture positioning surface, is compressed with pressing plate.
(4) by alloyMilling cutter is loaded on knife handle, to being attached to main shaft after complete knife.
(5) type face slot is rough milled, working depth 2mm has processed guiding function as Figure 2-3 for subsequent electrode.
(6) clamping and centering of fixture；Fixture is mounted on electric discharge machine with bolt and pressing plate, in the positioning of centering fixture
The heart and angular position are not more than 0.03mm, compress.
(7) the clamping centering of part；
By part positioning and clamping, it is installed on fixture positioning surface, is compressed with pressing plate.
(8) jacking electrode is attached on electric discharge machine.
(9) referring to Fig. 6, jacking electrode is by the slot of Milling Machining to just, being worked into away from stopping after 3mm depth above root.
(10) clamping and centering of fixture；Fixture is mounted on electric discharge machine with bolt and pressing plate, the positioning of centering fixture
Center and angular position are not more than 0.03mm, compress.
(11) clamping and centering of part；
By part positioning and clamping, it is installed on fixture positioning surface, is compressed with pressing plate.
(12) cutting electrode is attached on electric discharge machine.
(13) referring to Fig. 9, overlaying processing part is cut off into clout using cutting electrode, part major part material is gone
It removes.
(14) clamping and centering of fixture；
Fixture is mounted on electric discharge machine with bolt and pressing plate, centering fixture is not more than 0.03, compresses.
(15) clamping and centering of part；
By part positioning and clamping, it is installed on fixture positioning surface, is compressed with pressing plate.
(16) R type face electrode is attached on electric discharge machine；
(17) part R type face is used into R type face electrode machining in place.After the processing of part R type face as shown in Figure 1.
Electrical discharge machining EDM parameter
(19) clamping and centering of part；
By part positioning and clamping, it is installed on fixture positioning surface；
(20) finish-milling type cavity groove；
Using the six sword alloy milling cutter made of k44 material, cutter overall length is 150mm, a length of 80mm of sword, and tool orthogonal rake is
10 °, tool clearance is 15 °, and cutter spiral angle is 35 °.Cutting process by the way of first rough milling rear finish-milling, adopt by cutting process
With small cutting-in, fast feed, layered milling processing method, machined parameters are as shown in the table:
Claims (10)
1. a kind of semienclosed slot processing method of abnormally-structured part, which comprises the following steps:
Step 1 rough mills the type face slot for leading electrode according to fluting size to slotting position in engine mounting rail；
Step 2 by jacking electrode according to groove depth carries out cutting jacking on the type face slot rough milled out straight down；
Step 3 is integrally cut off the part that overlaying processing goes out using cutting electrode；
Section is processed as required R type face by R type face electrode by step 4；
Step 5 carries out finish-milling to groove face and examines, and completes the processing of engine mounting rail abnormal shape semienclosed slot.
2. the semienclosed slot processing method of abnormally-structured part according to claim 1, it is characterised in that: the engine peace
The material for filling beam is GH4169.
3. the semienclosed slot processing method of abnormally-structured part according to claim 1 or claim 2, it is characterised in that: described to start
Hardness HB >=346 of the material of machine mounting rail after fixation rates.
4. the semienclosed slot processing method of abnormally-structured part according to claim 1, it is characterised in that: described in step 1
The working depth of type face slot is 1.8mm~2.2mm.
5. the semienclosed slot processing method of abnormally-structured part according to claim 1, it is characterised in that: described in step 2
Jacking electrode is cut to root R type face and side the tangent straight down.
6. the semienclosed slot processing method of abnormally-structured part according to claim 1, it is characterised in that: described in step 5
The cutter for carrying out finish-milling to groove face uses the six sword alloy milling cutter made of k44 material.
7. the semienclosed slot processing method of abnormally-structured part according to claim 6, it is characterised in that: the overall length of cutter is
150mm, a length of 80mm of sword, tool orthogonal rake are 10 °, and tool clearance is 15 °, and cutter spiral angle is 35 °.
8. the semienclosed slot processing method of abnormally-structured part according to claim 1, it is characterised in that: the jacking electricity
Pole uses annular electrode, and cutting profile is identical as cross sectional shape needed for fluting.
9. the semienclosed slot processing method of abnormally-structured part according to claim 1, it is characterised in that: the jacking electricity
Pole, cutting electrode, R type face electrode are mounted on EP-50 electric discharge machine and are processed, and the input current of electric discharge machine is 10A, arteries and veins
Rushing gap is 1 μ s, and pulse width is 5 μ s.
10. the semienclosed slot processing method of abnormally-structured part according to claim 1, it is characterised in that: step 5 is to groove face
It carries out successively being divided into roughing and finishing when finish-milling, revolving speed when roughing is 500r/min, cutting depth 1mm, feeding speed
Degree is 60mm/min, and revolving speed when finishing is 700r/min, cutting depth 0.5mm, feed speed 100mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033934.XA CN109048368A (en) | 2018-09-05 | 2018-09-05 | A kind of semienclosed slot processing method of abnormally-structured part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033934.XA CN109048368A (en) | 2018-09-05 | 2018-09-05 | A kind of semienclosed slot processing method of abnormally-structured part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109048368A true CN109048368A (en) | 2018-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811033934.XA Pending CN109048368A (en) | 2018-09-05 | 2018-09-05 | A kind of semienclosed slot processing method of abnormally-structured part |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110434413A (en) * | 2019-08-30 | 2019-11-12 | 中国航发动力股份有限公司 | Axial-radial connects the processing method of slot inside a kind of bearing block |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695862A (en) * | 2004-12-16 | 2005-11-16 | 江汉大学 | Method for carrying out trepanning through electric spark based on wire frame type electrode |
| CN101524778A (en) * | 2009-03-10 | 2009-09-09 | 南京航空航天大学 | Slotted electrolytic machining method and slotted tool |
| CN102078970A (en) * | 2010-12-28 | 2011-06-01 | 通裕重工股份有限公司 | Large-diameter longhole jacking processing process as well as process equipment |
| CN102310309A (en) * | 2010-06-29 | 2012-01-11 | 上海重型机器厂有限公司 | Trepanning sampling method of blind hole at rotator center and tool thereof |
-
2018
- 2018-09-05 CN CN201811033934.XA patent/CN109048368A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695862A (en) * | 2004-12-16 | 2005-11-16 | 江汉大学 | Method for carrying out trepanning through electric spark based on wire frame type electrode |
| CN101524778A (en) * | 2009-03-10 | 2009-09-09 | 南京航空航天大学 | Slotted electrolytic machining method and slotted tool |
| CN102310309A (en) * | 2010-06-29 | 2012-01-11 | 上海重型机器厂有限公司 | Trepanning sampling method of blind hole at rotator center and tool thereof |
| CN102078970A (en) * | 2010-12-28 | 2011-06-01 | 通裕重工股份有限公司 | Large-diameter longhole jacking processing process as well as process equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110434413A (en) * | 2019-08-30 | 2019-11-12 | 中国航发动力股份有限公司 | Axial-radial connects the processing method of slot inside a kind of bearing block |
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Application publication date: 20181221 |