CN104759648A - Machining tool and machining method for precise step holes of aluminum alloy thin-wall casing - Google Patents

Machining tool and machining method for precise step holes of aluminum alloy thin-wall casing Download PDF

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Publication number
CN104759648A
CN104759648A CN201410000998.5A CN201410000998A CN104759648A CN 104759648 A CN104759648 A CN 104759648A CN 201410000998 A CN201410000998 A CN 201410000998A CN 104759648 A CN104759648 A CN 104759648A
Authority
CN
China
Prior art keywords
lathe tool
casing
cutter
stepped hole
thin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410000998.5A
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Chinese (zh)
Inventor
曾庆双
傅名伟
奚刚
万坤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China National South Aviation Industry Co Ltd
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China National South Aviation Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China National South Aviation Industry Co Ltd filed Critical China National South Aviation Industry Co Ltd
Priority to CN201410000998.5A priority Critical patent/CN104759648A/en
Publication of CN104759648A publication Critical patent/CN104759648A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B1/00Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B27/00Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/16Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
    • B23B27/1614Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts of special shape clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the insert
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B29/00Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/04Tool holders for a single cutting tool
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2205/00Fixation of cutting inserts in holders
    • B23B2205/04Fixation screws, bolts or pins of particular form

Abstract

The invention discloses a machining tool and a machining method for precise step holes of an aluminum alloy thin-wall casing. The processing tool is characterized in that a turning tool rod base is used for connecting a turning tool with a tool base part of a machine tool, so that the cutting range of the turning tool is widened, the degree of freedom of the turning tool is improved, and in particular, the turning tool can conveniently extend into the thin-wall casing when the precise step holes of the aluminum alloy thin-wall casing are machined. In the processing method, firstly, the thin-wall casing is placed on a fixture with the large end facing downwards and the small end facing upwards; then, screw holes in a clamping fixing surface at the large end of the thin-wall casing are aligned to screw holes in a clamping fixing surface of the fixture, and the thin-wall casing is clamped and fixed on the fixture through screws; and finally, the step holes are machined. The machining method can finish the machining of the whole step holes by clamping the casing once, and the deformation of the aluminum alloy thin-wall casing caused by clamping external force is prevented, so that the machining quality is guaranteed, and the machining efficiency is improved.

Description

The process tool of the accurate stepped hole of aluminium alloy thin-walled casing and processing method
Technical field
The application relates to process tool and the processing method of the accurate stepped hole of a kind of aluminium alloy thin-walled casing.
Background technology
Thin-Wall Outer Casing is the important load drive disk assembly of engine, and it is installed by each parts endoporus of engine and excircle orientation, realizes engine axiality self-consistentency, thus guarantees the security and stability of drive disk assembly in high-speed rotation.Thin-Wall Outer Casing bears the effect of engine charge and shunting adjustment air-flow, with inlet channel, and the revolving part structure that it be made up of air intake duct inside and outside leaf support plate and endoporus and cylindrical axis stepped hole structure straggly.Wherein the uniformity of stepped hole directly affects the combination property of engine complete machine.In Thin-Wall Outer Casing process, clamping is yielding, and form and position tolerance is tight, and particularly accurate stepped hole is to the coherence request of benchmark within Φ 0.02, and its crudy is difficult to ensure, efficiency is low, and repair rate is high.
Please refer to Fig. 1, add man-hour Thin-Wall Outer Casing by the schematic diagram after fixture clamping for carrying out aluminium alloy thin-walled casing at present, wherein, 101 is small end end face, and 102 is end face greatly, and 103 fix the stationary plane of Thin-Wall Outer Casing for clamp pressing, and 106 is cutting rotary rotating shaft.
Carry out at present needing clamping at twice in the method for Thin-Wall Outer Casing processing, upward, small end props up by clamping first large end, first processes endoporus 104 and A datum end face; Small end upward again, and large end leans on clamping (as shown in Figure 1), reprocesses out cylindrical 105 and D datum end face.
The installation way that the method adopts, casing is easily caused to be out of shape, after changing fixture, by the impact of deflection and datum clamp face accumulated error in twice clamping process, crudy is caused to be difficult to ensure, passing rate of processing is low, and repair rate is higher, and bring thus repeatedly measure, change a job, the increase of the management cost such as stagnation.Because casing is overstocked at current process, cause equipment bottleneck, increase workshop management difficulty, retun product isolation processing amount is large, and error rate increases, and brings larger hidden danger to production, quality management.
Summary of the invention
According to the first aspect of the application, this application provides the process tool of the accurate stepped hole of a kind of aluminium alloy thin-walled casing, comprising:
Lathe tool pole socket, one end of described lathe tool pole socket is provided with the holddown groove be connected with lathe tool rest position, and the other end is provided with lathe tool groove and the one or more screw holes vertical with described lathe tool slot length direction;
Lathe tool, described lathe tool groove is stretched in one end of described lathe tool, and is fixed on described lathe tool groove in by described screw hole by lathe tool by screw;
Turning insert, described turning insert is detachably fixedly installed on lathe tool and stretches into contrary one end, lathe tool groove one end.
According to the second aspect of the application, this application provides the processing method of the accurate stepped hole of a kind of aluminium alloy thin-walled casing, comprising:
By large for Thin-Wall Outer Casing end down, small end is positioned on fixture upward;
Screw hole on the folder stationary plane of large for Thin-Wall Outer Casing dress end is alignd with fixture clamping stationary plane upper bolt aperture, and by screw, Thin-Wall Outer Casing clamping is fixed on fixture;
Suitable cutter is selected to process the cylindrical of small end and step end face;
Suitable cutter is selected to process the inner circle of large end and stepped hole.
The process tool of the accurate stepped hole of a kind of aluminium alloy thin-walled casing that the application provides, lathe tool and lathe tool rest position is connected by lathe tool pole socket, thus add the machinable scope of lathe tool, improve the free degree of lathe tool, especially, when processing aluminium alloy thin-walled casing precision stepped hole, conveniently lathe tool is stretched into aluminium alloy thin-walled casing inner.In the processing method of the accurate stepped hole of a kind of aluminium alloy thin-walled casing that the application provides, first by large for Thin-Wall Outer Casing end down, small end is positioned on fixture upward, then the screw hole on the folder stationary plane of large for Thin-Wall Outer Casing dress end is alignd with fixture clamping stationary plane upper bolt aperture, and by screw, Thin-Wall Outer Casing clamping is fixed on fixture, carry out the processing of stepped hole afterwards again, this processing method only needs to carry out the processing that clamped one time can complete whole stepped hole, and, be fixed on fixture by the clamping stationary plane clamping of the large end of Thin-Wall Outer Casing, Thin-Wall Outer Casing can not be out of shape because of clamping external force, thus ensure that crudy, improve working (machining) efficiency.
Accompanying drawing explanation
Fig. 1 is that schematic diagram fixed by the clamping of aluminium alloy thin-walled casing and fixture in prior art;
Fig. 2 is the structural representation of the process tool of the accurate stepped hole of aluminium alloy thin-walled casing in a kind of embodiment of the application;
Fig. 3 is the structural representation of the process tool of the accurate stepped hole of aluminium alloy thin-walled casing in a kind of embodiment of the application;
Fig. 4 is the processing method schematic flow sheet of the accurate stepped hole of aluminium alloy thin-walled casing in a kind of embodiment of the application;
Fig. 5 is the schematic diagram processed small end cylindrical and step end face in the processing method of the accurate stepped hole of the aluminium alloy thin-walled casing of a kind of embodiment of the application;
Fig. 6 adds man-hour to large end inner circle and stepped hole in the processing method of the accurate stepped hole of the aluminium alloy thin-walled casing of a kind of embodiment of the application, and toolbox does not enter the schematic diagram of large end inner side;
Fig. 7 adds man-hour to large end inner circle and stepped hole in the processing method of the accurate stepped hole of the aluminium alloy thin-walled casing of a kind of embodiment of the application, and toolbox has entered the schematic diagram of large end inner side.
Detailed description of the invention
The embodiment of the present application provides process tool and the processing method of the accurate stepped hole of a kind of aluminium alloy thin-walled casing, and the embodiment of the present application is that the aluminium alloy thin-walled casing of ZL114A is described for example with the trade mark.Due to intensity of aluminum alloy and hardness relatively low, plasticity is less, and thermal conductivity is high, and Cutter wear is little, and machinability is better, belongs to easy rapidoprint, but thermal coefficient of expansion is large, and temperature influence is larger.Traditional diamond-making technique easily causes aluminium alloy thin-walled casing to be out of shape, and crudy is urgently improved.In the processing method of the accurate stepped hole of the aluminium alloy thin-walled casing that the embodiment of the present application provides, the mode of reverse turnery processing is specifically adopted to process the accurate profile stepped hole of aluminium alloy thin-walled casing, the cutter adapting to specification is selected according to pore size, be arranged on the lathe tool of the turning tool rod of suitable diameter and length, bias enters Internal periphery work surface, carry out reverse machining step profile from inside to outside, until the radial dimension in hole and deep processing qualified till.
Common, the accurate profile stepped hole of aluminium alloy thin-walled casing is specially casing installing hole, the following processing request of its demand fulfillment: the aperture of the installing hole in stepped hole and requirement are Φ 290 + 0.04mm, requires Φ 0.02 to the axiality of small end cylindrical, and ensure that small end cylindrical beats 0.02 to installing hole, surface roughness requirements is Ra1.60 μm simultaneously; The processing request of step surface is to the small end step end face depth of parallelism 0.02, and surface roughness requirements is Ra1.60 μm.Process tool and the processing method of the accurate stepped hole of the aluminium alloy thin-walled casing that the embodiment of the present application provides can meet above-mentioned processing request well.
By reference to the accompanying drawings the application is described in further detail below by detailed description of the invention.
Embodiment one
Please refer to Fig. 2 and Fig. 3, present embodiments provide the process tool of the accurate stepped hole of a kind of aluminium alloy thin-walled casing, comprise lathe tool pole socket 201, lathe tool 205 and turning insert 207.
One end of lathe tool pole socket 201 is provided with the holddown groove 202 be connected with lathe tool rest position 200, and the other end is provided with lathe tool groove 203 and the one or more screw holes 204 vertical with lathe tool groove 203 length direction.
Lathe tool groove 203 is stretched in one end of lathe tool 205, and is fixed in lathe tool groove 203 by lathe tool 205 by screw hole 204 by screw 206.
Turning insert 207, turning insert 207 is detachably fixedly installed on lathe tool 205 and stretches into contrary one end, lathe tool groove 203 one end.
In a particular embodiment, the length of lathe tool pole socket 201 is 220-240mm; After one end of lathe tool pole socket 201 is fastened on lathe tool rest position by holddown groove 202, the outstanding length being deep to turning insert 207 point of a knife place is not less than 130mm; After one end of lathe tool 205 is fastened on lathe tool groove 203, the length of stretching out position to the blade 207 point of a knife place of lathe tool groove 203 is not less than 60mm.
Concrete, in the present embodiment, the length of lathe tool pole socket 201 is 230mm; After one end of lathe tool pole socket 201 is fastened on lathe tool rest position by holddown groove 202, the outstanding length being deep to turning insert 207 point of a knife place is 130mm; After one end of lathe tool 205 is fastened on lathe tool groove 203, the length of stretching out position to the blade 207 point of a knife place of lathe tool groove 203 is 60mm.
The process tool of the accurate stepped hole of a kind of aluminium alloy thin-walled casing that the present embodiment provides, lathe tool and lathe tool rest position is connected by lathe tool pole socket, thus add the machinable scope of lathe tool, improve the free degree of lathe tool, especially, when processing aluminium alloy thin-walled casing precision stepped hole, conveniently lathe tool is stretched into Thin-Wall Outer Casing inside.
Embodiment two
Please refer to Fig. 4, present embodiments provide the processing method of the accurate stepped hole of a kind of aluminium alloy thin-walled casing, comprise step below:
Step 401: by large for Thin-Wall Outer Casing end down, small end is positioned on fixture upward.
Step 402: the screw hole on the folder stationary plane of large for Thin-Wall Outer Casing dress end is alignd with fixture clamping stationary plane upper bolt aperture, and by screw, Thin-Wall Outer Casing clamping is fixed on fixture.
Step 403: select suitable cutter to process the cylindrical of small end and step end face.After Thin-Wall Outer Casing clamping, the cylindrical of small end and step end face are positioned at outside, and therefore, what be applicable to the cutter that small end is processed in step 403 is all kinds of more, only need to require according to a cutting tool choice conventional at present.Please refer to Fig. 5, in step 403 to the schematic diagram that small end cylindrical is processed, 501 is lathe tool, and 502 is small end cylindrical, 503 be cut time rotating shaft.
Step 404: select suitable cutter to process the inner circle of large end and stepped hole.
In the present embodiment, step 404 comprises: after selecting suitable cutter, first by the bottom of eccentric for turning tool rod access aperture, after point of a knife is completely by hole depth, is laterally walked to stepped hole point to be processed position by point of a knife, then carries out reverse turnery processing from inside to outside.Please refer to Fig. 6 and Fig. 7, in step 404 to the schematic diagram that large end inner circle and stepped hole are processed.Wherein, Fig. 6 is the schematic diagram that toolbox does not also enter inside large end, and Fig. 7 is the schematic diagram that toolbox has entered large end inner side, and 601 is toolbox, and 602 is large to be processed of holding inner circle and stepped hole.
In the present embodiment, step 403 comprises: select suitable cutter to carry out roughing to the cylindrical of small end and step end face, selects suitable cutter to carry out fine finishining to the cylindrical of small end and step end face afterwards again.
Step 404 comprises: select suitable cutter to carry out roughing to the inner circle of large end and stepped hole, selects suitable cutter to carry out fine finishining to the inner circle of large end and stepped hole afterwards again.
In a particular embodiment, the rotating speed adopted during roughing is 110-130r/min, the amount of feeding is 0.15mm/r, cutting depth is 0.8mm; The rotating speed adopted during fine finishining is 50-70r/min, the amount of feeding is 0.05mm/r, cutting depth is 0.2mm.
Concrete, the rotating speed adopted during roughing is 120r/min, and the rotating speed adopted during fine finishining is 60r/min.
In a particular embodiment, the turning insert of the cutter adopted during roughing is 80 ° of diamond shaped insert, and the turning insert of the cutter adopted during fine finishining is 35 ° of diamond shaped insert.Take the trade mark as the aluminium alloy thin-walled casing of ZL114A be example, usually adopt the carbide chip that aluminium alloy cuts during cutting, such as 35 °, 55 °, 80 ° diamond shaped insert.Because surplus during roughing is more, therefore adopt 80 ° of diamond shaped insert, to obtain process velocity faster; During fine finishining, surplus is less, therefore adopts 35 ° of rhombus cuttves to levy, to obtain better crudy.In other embodiments, if Thin-Wall Outer Casing is titanium alloy or steel components, then need equally to select corresponding blade to process.
In the present embodiment, the inner circle of holding greatly and stepped hole are added to the process tool of the accurate stepped hole of the aluminium alloy thin-walled casing adopting man-hour above-described embodiment one to provide.
In the processing method of the accurate stepped hole of the aluminium alloy thin-walled casing that the present embodiment provides, first by large for Thin-Wall Outer Casing end down, small end is positioned on fixture upward, then the screw hole on the clamping stationary plane of large for Thin-Wall Outer Casing end is alignd with fixture clamping stationary plane upper bolt aperture, and by screw, Thin-Wall Outer Casing clamping is fixed on fixture, carry out the processing of stepped hole afterwards again, this processing method only needs to carry out the processing that clamped one time can complete whole stepped hole, and, be fixed on fixture by the clamping stationary plane clamping of the large end of Thin-Wall Outer Casing, Thin-Wall Outer Casing can not be out of shape because of clamping external force, thus ensure that crudy, improve working (machining) efficiency.
Above content is the further description done the application in conjunction with concrete embodiment, can not assert that the concrete enforcement of the application is confined to these explanations.For the application person of an ordinary skill in the technical field, under the prerequisite not departing from the present application design, some simple deduction or replace can also be made.

Claims (10)

1. a process tool for the accurate stepped hole of aluminium alloy thin-walled casing, is characterized in that, comprising:
Lathe tool pole socket (201), one end of described lathe tool pole socket (201) is provided with the holddown groove (202) be connected with lathe tool rest position, and the other end is provided with lathe tool groove (203) and the one or more screw holes (204) vertical with described lathe tool groove (203) length direction;
Lathe tool (205), described lathe tool groove (203) is stretched in one end of described lathe tool (205), and is fixed on described lathe tool groove (203) in by described screw hole (204) by lathe tool (205) by screw (206);
Turning insert (207), described turning insert (207) is detachably fixedly installed on lathe tool (205) and stretches into contrary one end, lathe tool groove (203) one end.
2. cutter as claimed in claim 1, it is characterized in that, the length of described lathe tool pole socket (201) is 220-240mm; After one end of described lathe tool pole socket (201) is fastened on lathe tool rest position by holddown groove (202), the outstanding length being deep to turning insert (207) point of a knife place is not less than 130mm; After one end of described lathe tool (205) is fastened on lathe tool groove (203), the length of stretching out position to blade (207) the point of a knife place of lathe tool groove (203) is not less than 50mm.
3. cutter as claimed in claim 2, it is characterized in that, the length of described lathe tool pole socket (201) is 230mm; After one end of described lathe tool pole socket (201) is fastened on lathe tool rest position by holddown groove (202), the outstanding length being deep to turning insert (207) point of a knife place is 130mm; After one end of described lathe tool (205) is fastened on lathe tool groove (203), the length of stretching out position to blade (207) the point of a knife place of lathe tool groove (203) is 60mm.
4. a processing method for the accurate stepped hole of aluminium alloy thin-walled casing, is characterized in that, comprising:
By large for Thin-Wall Outer Casing end down, small end is positioned on fixture upward;
Screw hole on the clamping stationary plane of large for Thin-Wall Outer Casing end is alignd with fixture clamping stationary plane upper bolt aperture, and by screw, Thin-Wall Outer Casing clamping is fixed on fixture;
Suitable cutter is selected to process the cylindrical of small end and step end face;
Suitable cutter is selected to process the inner circle of large end and stepped hole.
5. method as claimed in claim 4, it is characterized in that, the suitable cutter of described selection is processed the inner circle of large end and stepped hole, comprise: after selecting suitable cutter, first by the bottom of eccentric for turning tool rod access aperture, after point of a knife is completely by hole depth, point of a knife is laterally walked to stepped hole point to be processed position, then carries out reverse turnery processing from inside to outside.
6. method as claimed in claim 4, it is characterized in that, the suitable cutter of described selection is processed the cylindrical of small end and end face, comprising: select suitable cutter to carry out roughing to the cylindrical of small end and end face, selects suitable cutter to carry out fine finishining to the cylindrical of small end and end face afterwards again;
The suitable cutter of described selection is processed the inner circle of large end and stepped hole, comprising: select suitable cutter to carry out roughing to the inner circle of large end and stepped hole, selects suitable cutter to carry out fine finishining to the inner circle of large end and stepped hole afterwards again.
7. method as claimed in claim 6, it is characterized in that, the rotating speed adopted during described roughing is 110-130r/min, the amount of feeding is 0.15mm/r, cutting depth is 0.8mm; The rotating speed adopted during described fine finishining is 50-70r/min, the amount of feeding is 0.05mm/r, cutting depth is 0.2mm.
8. method as claimed in claim 7, it is characterized in that, the rotating speed adopted during described roughing is 120r/min, and the rotating speed adopted during described fine finishining is 60r/min.
9. method as claimed in claim 6, it is characterized in that, the blade of the cutter adopted during described roughing is 80 ° of diamond shaped insert, and the blade of the cutter adopted during described fine finishining is 35 ° of diamond shaped insert.
10. the method as described in any one of claim 4-9, is characterized in that, the described inner circle to large end and stepped hole add the process tool adopting the accurate stepped hole of the aluminium alloy thin-walled casing as described in any one of claim 1-3 man-hour.
CN201410000998.5A 2014-01-02 2014-01-02 Machining tool and machining method for precise step holes of aluminum alloy thin-wall casing Pending CN104759648A (en)

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Application Number Priority Date Filing Date Title
CN201410000998.5A CN104759648A (en) 2014-01-02 2014-01-02 Machining tool and machining method for precise step holes of aluminum alloy thin-wall casing

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Application Number Priority Date Filing Date Title
CN201410000998.5A CN104759648A (en) 2014-01-02 2014-01-02 Machining tool and machining method for precise step holes of aluminum alloy thin-wall casing

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105290836A (en) * 2015-11-23 2016-02-03 沈阳黎明航空发动机(集团)有限责任公司 Method for machining narrow-space large-overhanging casing part and clamp
CN106881634A (en) * 2015-12-10 2017-06-23 贵州红林机械有限公司 A kind of processing method of steel part bushing stepped hole axiality
CN108098005A (en) * 2017-12-25 2018-06-01 谢小坚 A kind of Thin-Wall Outer Casing class machine parts'precise hole machined equipment
CN110253234A (en) * 2019-07-22 2019-09-20 湖南南方通用航空发动机有限公司 A kind of processing method of aero-engine low-pressure turbine guider outer cover
CN112355579A (en) * 2020-10-29 2021-02-12 中国航发南方工业有限公司 Machining method of rotary casing

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105290836A (en) * 2015-11-23 2016-02-03 沈阳黎明航空发动机(集团)有限责任公司 Method for machining narrow-space large-overhanging casing part and clamp
CN105290836B (en) * 2015-11-23 2017-07-28 沈阳黎明航空发动机(集团)有限责任公司 A kind of big overhanging casing part processing clamp of narrow space
CN106881634A (en) * 2015-12-10 2017-06-23 贵州红林机械有限公司 A kind of processing method of steel part bushing stepped hole axiality
CN108098005A (en) * 2017-12-25 2018-06-01 谢小坚 A kind of Thin-Wall Outer Casing class machine parts'precise hole machined equipment
CN108098005B (en) * 2017-12-25 2019-06-18 江西华友机械有限公司 A kind of Thin-Wall Outer Casing class machine parts'precise hole machined equipment
CN110253234A (en) * 2019-07-22 2019-09-20 湖南南方通用航空发动机有限公司 A kind of processing method of aero-engine low-pressure turbine guider outer cover
CN112355579A (en) * 2020-10-29 2021-02-12 中国航发南方工业有限公司 Machining method of rotary casing

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