CN106425286A - Machining method for deformation control of high-precision thin-wall cylinder shaft - Google Patents

Machining method for deformation control of high-precision thin-wall cylinder shaft Download PDF

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Publication number
CN106425286A
CN106425286A CN201510831008.7A CN201510831008A CN106425286A CN 106425286 A CN106425286 A CN 106425286A CN 201510831008 A CN201510831008 A CN 201510831008A CN 106425286 A CN106425286 A CN 106425286A
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China
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workpiece
processing
fixture
small
deformation
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CN201510831008.7A
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Chinese (zh)
Inventor
郑琪然
姜雪梅
文国军
邓昶
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沈阳黎明航空发动机(集团)有限责任公司
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Priority to CN201510831008.7A priority Critical patent/CN106425286A/en
Publication of CN106425286A publication Critical patent/CN106425286A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23POTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06Work-clamping means
    • B23Q3/062Work-clamping means adapted for holding workpieces having a special form or being made from a special material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q2703/00Work clamping
    • B23Q2703/02Work clamping means
    • B23Q2703/10Devices for clamping workpieces of a particular form or made from a particular material

Abstract

The invention discloses a machining method for deformation control of a high-precision thin-wall cylinder shaft. A process scheme is determined: because a workpiece belongs to a thin-wall piece, the deformation control needs to be considered at the beginning of formulating a process route, the influence on deformation of the workpiece by machining stress in finish turning is controlled; an anti-deformation fixture structure is determined: a workpiece clamping mode is researched; a fixture clamping scheme is improved; a special anti-deformation fixture is used for finely turning inner and outer molded surfaces and machining a large end surface hole groove and a small end surface hole groove to solve the deformation problem caused in workpiece machining; the large end surface is axial reference of the whole workpiece to reach high precision requirement; and the small end surface is higher in technical condition requirement on the large end surface. The machining method has the following advantages: the technical difficulty of deformation of a high-temperature alloy thin-wall cylinder shaft is solved, a qualified workpiece is finally machined, the technical bottleneck of deformation of the high-temperature alloy thin-wall cylinder shaft is broken through, the workpiece design requirements are guaranteed, and the machining method can be popularized and applied in the same kind of workpieces to provide precious experiences for similar workpiece machining.

Description

The processing method that a kind of high accuracy thin wall cylinder axle controls deformation

Technical field

The present invention relates to machining technology field, control the processing of deformation particularly to a kind of high accuracy thin wall cylinder axle Method.

Background technology

In Machining Technology, particularly in the processing and manufacturing of high accuracy high temperature alloy thin wall cylinder shaft-like work, deformation Problem is always big technological difficulties, has a strong impact on the qualification rate of workpiece.Such workpiece is to connect first in the past from untreated Touch, be not similar to referential processing technique.High temperature alloy cylinder shaft-like work is important parts, and dimensional accuracy is higher, and technical conditions will Ask many and extremely strict, whole type is faced the wall and meditated thickness only 1.8-2mm, and workpiece material is high temperature alloy, belongs to difficult-to-machine material, according to conventional Processing mode processing, cylinder shaft-like work is total to have very big deformation, or even has badly influenced the good for delivery of workpiece, controls Cylinder shaft-like work deformation has become as a technical bottleneck urgently to be resolved hurrily, is badly in need of researching and developing a kind of high accuracy high temperature alloy thin wall cylinder axle The control method of deformation.

Content of the invention

The invention aims to controlling high accuracy high temperature alloy thin wall cylinder shaft distortion, it is thin that spy provides a kind of high accuracy The processing method that wall cylinder axle controls deformation.

The invention provides a kind of high accuracy thin wall cylinder axle control deformation processing method it is characterised in that:Described height Precision thin wall cylinder axle control deformation processing method be:

1) determine process program:Because workpiece belongs to thin-wall part, it is necessary for when starting and formulating process route considering control Deformation;

Workpiece material is high temperature alloy, and when processing, cutting force is big, easily accumulates larger Machining stress, for maximum limit Degree reduces the impact that Machining stress deforms to workpiece, and process route is scheduled that hidden lino removal twice:Through car ultrasound wave Face, rough turn after, workpiece every side residue 2~3mm surplus, workpiece removes that material is many, and accumulation Machining stress is big, now carries out for the first time Hidden lino removal, eliminates the stress of former procedure accumulations;After half smart car, each side surplus is strict controlled in 1mm, then enters Hidden lino removal of row, the Machining stress accumulated in release workpiece, when controlling smart car, Machining stress deforms to workpiece Impact;

Because workpiece 1.8-2mm, for ensureing the machining accuracy of this size, interior outer mold surface is added in same operation Work, reduces the impact to each dimensional accuracy for the repeated clamping;Simultaneously because processing at one time interior outer mold surface, the technology bar of correlation Part is also guaranteed;

2) determine anti-deformation fixture structure:Determine clamping workpiece mode, improve fixture fixture scheme, external form in smart car Face, processing large end face hole slot, processing small end face hole slot adopt distortion-free special fixture, solve the deformation causing during work pieces process Problem;

In smart car, during outer mold surface, general fixture is carried out using inside and outside pressing plate or gland, because this workpiece is too thin, just Property is poor, is also easy to produce chatter mark, workpiece is also yielding, a lot of required precision higher dimensional and technical conditions cannot ensure during processing;If Count a set of special-purpose vehicles processing type face fixture, with dismountable cylindrical support, one group of dismountable inner support, the conical surface supports, To reduce parts fixation deformation;Exclusive clamps have position portion, clamping device, hold down gag, also support meanss;Fixture has 4 Group pressing plate, 4 independent dismountable cylindrical supports, one group of dismountable inner support, the conical surface supports, end face gland etc., mainly Using pressing plate compression, then coordinate inside and outside circle Auxiliary support, to ensure clamping quality, reduce Workpiece vibration, control workpiece deformation;Adopt Process workpiece with this sleeve clamp, workpiece is accomplished fully to support, deformation has obtained effective control;

Large end face is the axial benchmark of whole workpiece, and required precision is high;When processing large end face, cutter drill thrust makes workpiece Big end yielding it is impossible to meet large end face high-precision requirement, fixture, reduce workpiece deformation;Fixture holds inner face for supporting with big, Small end inner circle is seam, and compression is big to hold end face;Inside support base, aperture is used for boring boring large end face hole operation, when preventing boring, bores Hinder fixture, there is breach in outside, for the cylindrical gap procedures in the big end of milling, gland has corresponding breach, for milling large end face Groove operation;Fixture meets three operation use requirements;

Small end face has higher technical conditions to require to large end face;During processing small end face, because allowance is big and existing Drilling and turning, has Milling Machining again, and small end face is yielding, it is difficult to ensure that the relative requirement with large end face;It is thus desirable to entering to small end Row fully supports, and with the less knife that shakes, controls workpiece deformation;This fixture upper end supporting surface is two dismountable half ring type structures, After putting the workpiece in fixture, then adjust supporting surface support workpiece small end lower surface, and with screw, supporting surface is fixed on fixture On;When boring boring small end end-face hole and small end the inner end-face hole, compress small end end face with special pressing plate;In processing small end end face Inside the cylindrical lace of groove, small end, small end inner face during lace, pass through small end end-face hole by Work-sheet pressing on fixture with screw, Dismantle special pressing plate, start to process;Fixture meets five operation use requirements;

3) cutting tool, machined parameters are optimized;Tool radius are too small, the corresponding also very little of cutting depth, and stock-removing efficiency is not high, And the blade because the reason material is very hard gives up very much, tool radius are excessive, and cutting contact surface is big, and cutting force is also very big, easily Cause the deformation of thin-wall part;According to work status, in conjunction with practical situation, the cutter being finally suitable for;Rotating speed is high, and the amount of feeding is big, though Stock-removing efficiency so can be improved, but the material of excision is many within the unit interval, workpiece conduction of heat is insufficient, the machine of accumulation adds should Power is also greatly it is easy to lead to thin-wall part to deform;Cutting depth is restricted by tool radius, and cutting depth will directly affect workpiece The cutting force being subject to, because the tool radius selected are only 0.4mm, and in order to reduce the impact to thin-wall part for the cutting force, cutting Depth is also unsuitable excessive;On the premise of meeting machining accuracy, select suitable cutting parameter;

4) carry out testpieces test, grope to process rule:Outer mold surface in smart car, processing size are solved by processing experiment The impact behind end, workpiece being deformed;Solve the problems, such as to process chatter using new construction fixture;Selected by processing experiment The feasibility of cutter, the reasonability of cutting parameter;When the big end of processing and small end, because of the thin poor rigidity of workpiece wall, according to normal milling Processing workpiece end face has deformation, for the impact controlling cutting force that workpiece is deformed further, therefore adopts multiple reaming processing With layering processing;Size and technical conditions all meet drawing requirement after testing;

5) after testpieces pass the test, more formally process subsequent workpiece, using the process route same with testpieces, clamping Mode, process tool, cutting parameter;After formal work pieces process, through with three coordinate measurement passed examinations, breaching high temperature alloy thin The technical bottleneck of wall cylinder shaft-like work deformation.

Advantages of the present invention:

The processing method that high accuracy thin wall cylinder axle of the present invention controls deformation, solves high temperature alloy thin wall cylinder axle and becomes The technical barrier of shape.Thin wall cylinder shaft-like work, wall is thin, and each dimension precision requirement of workpiece is high, and technical conditions require tight, a lot of technology bars Part is all between 0.015~0.025mm.Stage casing wall thickness is 2mm, big end cone face wall thickness only 1.8mm, and big end is evenly equipped with XX Φ XX Aperture, small end is evenly equipped with XX Φ XX aperture, and size stomidium position degree is 0.04mm, and small end inner face is evenly equipped with XX Φ X Aperture, small end cylindrical corresponding with small end inner face inner circle XX at lace is distributed with, small end end face has groove at XX.Also has dynamic balancing etc. Technical requirements, required precision is high, processing it is difficult to ensure that.And this workpiece belongs to thin-wall part, whole type face thickness only 1.8-2mm, Poor structure rigidity;Workpiece material is high temperature alloy, and this material hardness is high, and machinability is poor, nothing directly can experience for reference, these are all For ensureing that this workpiece processing quality brings difficulty.In reality processing, formulate rational processing route, devise a set of lathe Fixture, two sets are simultaneously used for the fixture of boring machine and milling machine to reduce workpiece deformation, select suitable cutter, and optimize cutting ginseng Number, using the slow-speed of revolution little feeding processing, finally processes qualified workpiece, breaches the technology bottle of high temperature alloy thin wall cylinder shaft distortion Neck, it is ensured that workpiece design requirement, can be promoted the use of in identical jobs, provide the experience of preciousness for similar work pieces process, Lifting to manufacturing technology level, has far-reaching significance and certain economic benefit.

Brief description

Below in conjunction with the accompanying drawings and embodiment the present invention is further detailed explanation:

Fig. 1 is to repair small end benchmark machining sketch chart;

Fig. 2 is outer mold surface processing partial schematic diagram in smart car;

Fig. 3 is processing large end face fixture schematic diagram;

Fig. 4 is processing small end face fixture schematic diagram;

Fig. 5 is processing large end face schematic diagram;

Fig. 6 is processing small end face schematic diagram.

Specific embodiment

Embodiment 1

Present embodiments provide a kind of high accuracy thin wall cylinder axle control deformation processing method it is characterised in that:Described High accuracy thin wall cylinder axle control deformation processing method be:

1) determine process program:Because workpiece belongs to thin-wall part, it is necessary for when starting and formulating process route considering control Deformation;

Workpiece material is high temperature alloy, and when processing, cutting force is big, easily accumulates larger Machining stress, for maximum limit Degree reduces the impact that Machining stress deforms to workpiece, and process route is scheduled that hidden lino removal twice:Through car ultrasound wave Face, rough turn after, workpiece every side residue 2~3mm surplus, workpiece removes that material is many, and accumulation Machining stress is big, now carries out for the first time Hidden lino removal, eliminates the stress of former procedure accumulations;After half smart car, each side surplus is strict controlled in 1mm, then enters Hidden lino removal of row, the Machining stress accumulated in release workpiece, when controlling smart car, Machining stress deforms to workpiece Impact;

Because workpiece 1.8-2mm, for ensureing the machining accuracy of this size, interior outer mold surface is added in same operation Work, reduces the impact to each dimensional accuracy for the repeated clamping;Simultaneously because processing at one time interior outer mold surface, the technology bar of correlation Part is also guaranteed;

2) determine anti-deformation fixture structure:Determine clamping workpiece mode, improve fixture fixture scheme, external form in smart car Face, processing large end face hole slot, processing small end face hole slot adopt distortion-free special fixture, solve the deformation causing during work pieces process Problem;

In smart car, during outer mold surface, general fixture is carried out using inside and outside pressing plate or gland, because this workpiece is too thin, just Property is poor, is also easy to produce chatter mark, workpiece is also yielding, a lot of required precision higher dimensional and technical conditions cannot ensure during processing;If Count a set of special-purpose vehicles processing type face fixture, with dismountable cylindrical support, one group of dismountable inner support, the conical surface supports, To reduce parts fixation deformation;Exclusive clamps have position portion, clamping device, hold down gag, also support meanss;Fixture has 4 Group pressing plate, 4 independent dismountable cylindrical supports, one group of dismountable inner support, the conical surface supports, end face gland etc., mainly Using pressing plate compression, then coordinate inside and outside circle Auxiliary support, to ensure clamping quality, reduce Workpiece vibration, control workpiece deformation;Adopt Process workpiece with this sleeve clamp, workpiece is accomplished fully to support, deformation has obtained effective control;

Large end face is the axial benchmark of whole workpiece, and required precision is high;When processing large end face, cutter drill thrust makes workpiece Big end yielding it is impossible to meet large end face high-precision requirement, fixture, reduce workpiece deformation;Fixture holds inner face for supporting with big, Small end inner circle is seam, and compression is big to hold end face;Inside support base, aperture is used for boring boring large end face hole operation, when preventing boring, bores Hinder fixture, there is breach in outside, for the cylindrical gap procedures in the big end of milling, gland has corresponding breach, for milling large end face Groove operation;Fixture meets three operation use requirements;

Small end face has higher technical conditions to require to large end face;During processing small end face, because allowance is big and existing Drilling and turning, has Milling Machining again, and small end face is yielding, it is difficult to ensure that the relative requirement with large end face;It is thus desirable to entering to small end Row fully supports, and with the less knife that shakes, controls workpiece deformation;This fixture upper end supporting surface is two dismountable half ring type structures, After putting the workpiece in fixture, then adjust supporting surface support workpiece small end lower surface, and with screw, supporting surface is fixed on fixture On;When boring boring small end end-face hole and small end the inner end-face hole, compress small end end face with special pressing plate;In processing small end end face Inside the cylindrical lace of groove, small end, small end inner face during lace, pass through small end end-face hole by Work-sheet pressing on fixture with screw, Dismantle special pressing plate, start to process;Fixture meets five operation use requirements;

3) cutting tool, machined parameters are optimized;Tool radius are too small, the corresponding also very little of cutting depth, and stock-removing efficiency is not high, And the blade because the reason material is very hard gives up very much, tool radius are excessive, and cutting contact surface is big, and cutting force is also very big, easily Cause the deformation of thin-wall part;According to work status, in conjunction with practical situation, the cutter being finally suitable for;Rotating speed is high, and the amount of feeding is big, though Stock-removing efficiency so can be improved, but the material of excision is many within the unit interval, workpiece conduction of heat is insufficient, the machine of accumulation adds should Power is also greatly it is easy to lead to thin-wall part to deform;Cutting depth is restricted by tool radius, and cutting depth will directly affect workpiece The cutting force being subject to, because the tool radius selected are only 0.4mm, and in order to reduce the impact to thin-wall part for the cutting force, cutting Depth is also unsuitable excessive;On the premise of meeting machining accuracy, select suitable cutting parameter;

4) carry out testpieces test, grope to process rule:Outer mold surface in smart car, processing size are solved by processing experiment The impact behind end, workpiece being deformed;Solve the problems, such as to process chatter using new construction fixture;Selected by processing experiment The feasibility of cutter, the reasonability of cutting parameter;When the big end of processing and small end, because of the thin poor rigidity of workpiece wall, according to normal milling Processing workpiece end face has deformation, for the impact controlling cutting force that workpiece is deformed further, therefore adopts multiple reaming processing With layering processing;Size and technical conditions all meet drawing requirement after testing;

5) after testpieces pass the test, more formally process subsequent workpiece, using the process route same with testpieces, clamping Mode, process tool, cutting parameter;After formal work pieces process, through with three coordinate measurement passed examinations, breaching high temperature alloy thin The technical bottleneck of wall cylinder shaft-like work deformation.

Thin wall cylinder shaft-like work, wall is thin, and stage casing wall thickness is 2mm, big end cone face wall thickness only 1.8mm, and each dimensional accuracy of workpiece will Ask high, technical conditions require sternly, and a lot of technical conditions are all between 0.015~0.025mm.Stage casing wall thickness is 2mm, big end cone face Wall thickness only 1.8mm, big end is evenly equipped with XX Φ XX aperture, and small end is evenly equipped with XX Φ XX aperture, and size stomidium position degree is 0.04mm, small end inner face is evenly equipped with XX Φ X aperture, and small end cylindrical be distributed with corresponding with small end inner face inner circle is spent at XX Side, small end end face has groove at XX.Also have the technical requirements such as dynamic balancing, required precision is high, processing it is difficult to ensure that.And this workpiece belongs to In thin-wall part, whole type face thickness only 1.8-2mm, poor structure rigidity;Workpiece material is high temperature alloy, and this material hardness is high, can Machinability is poor, no directly can experience for reference, these be all that this workpiece processing quality of guarantee brings difficulty.As Fig. 1, the change of thin wall cylinder axle Shape is controlled to thin-wall high temperature alloy cylinder shaft-like work key technology of processing difficult point.

1st, the control that process route deforms to workpiece

Because workpiece belongs to thin-wall part, it is necessary for when starting and formulating process route considering to control deformation.

Workpiece material is high temperature alloy, and when processing, cutting force is big, easily accumulates larger Machining stress, for maximum limit Degree reduces the impact that Machining stress deforms to workpiece, and process route is scheduled that hidden lino removal twice:Through car ultrasound wave Face, rough turn after, workpiece every side residue 2~3mm surplus, workpiece removes that material is many, and accumulation Machining stress is big, now carries out for the first time Hidden lino removal, eliminates the stress of former procedure accumulations;After half smart car, each side surplus is strict controlled in 1mm, then enters Hidden lino removal of row, the Machining stress accumulated in release workpiece, when controlling smart car, Machining stress deforms to workpiece Impact.

Because workpiece only 2mm, for ensureing the machining accuracy of this size, inside and outside round face is added in same operation Work, reduces the impact to each dimensional accuracy for the repeated clamping.Simultaneously because processing at one time interior outer mold surface, the technology bar of correlation Part is also guaranteed.

2nd, repair small end benchmark before smart car

After second hidden lino removal, repair small end benchmark.Before processing, centering fixture counterface is beated not More than 0.01mm.By big end end face and cylindrical on the basis of, compression is big to hold inner face, tensioner inner mold face, such as Fig. 2.Lean in outer mold surface Wide about 10mm, the annular centering band of deep 0.1 (millimeter) max are processed on workpiece centre position, so that external form in lower operation smart car Face centering is used.

3rd, in smart car, outer mold surface controls deformation

In order to control workpiece poor, ensure the requirement of each technical conditions simultaneously, after repairing small end benchmark, time processing Interior outer mold surface and end face.Workpiece is at this operation reality processing position as shown in figure 3, little end position is the portion that this operation is used for clamping Point, it is divided into this operation to need processing part inside dotted line.

In order to reach outer mold surface and end face in clamped one time processing, and reduce the afterburning impact to workpiece deformation of machine, therefore Devise special lathe finish fixture.

As shown in figure 4, fixture has 4 groups of pressing plates, 4 independent dismountable cylindrical supports, one group of dismountable inner support, The conical surface supports, end face gland etc., mainly adopts pressing plate compression, then coordinates inside and outside circle Auxiliary support, to ensure clamping quality, reduces Workpiece vibration, controls workpiece deformation.In reality processing, first with pressing plate gently workpiece pressing, centering cylindrical centering band is beated not After 0.01mm, clamping platen, cylindrical Auxiliary support is installed, adjusts knob above, so that supporting surface is connect with workpiece outer mold surface Touch, now start to process workpiece end face and inner mold face.After completion of processing, inner support is installed, installs and adjust the conical surface and support to light Light workpiece pressing, then slight compression end face gland, and lay down cylindrical support, now start to process workpiece outer mold surface.

Workpiece is processed using this sleeve clamp, workpiece is adequately supported, deformation has obtained effective control.Workpiece table after processing Face no chatter mark substantially, meets the requirement to workpiece size precision and technical conditions for the design drawing.

4th, cutting tool, machined parameters are optimized

Because workpiece material be high temperature alloy, be suitable for processing cutter material be TS2000, CP200, KC5010, IC907 etc., according to work status, in conjunction with practical situation, final buying material is processed for CP200 blade.Tool radius are too small, cut Cut the corresponding also very little of depth, stock-removing efficiency is not high, and because material is very hard, blade abrasion is fast, and tool radius are excessive, and cutting connects Contacting surface is big, and cutting force is also very big, easily causes the deformation of thin-wall part, and considering from blade radius is R0.4mm.Rotating speed is high, The amount of feeding is greatly although stock-removing efficiency can be improved, but the material of excision is many within the unit interval, and workpiece conduction of heat is insufficient, The Machining stress of accumulation is also greatly it is easy to lead to thin-wall part to deform.Cutting depth is restricted by tool radius, and cutting depth will Directly affect the cutting force that workpiece is subject to, because the tool radius selected are only 0.4mm, and in order to reduce cutting force to thin-wall part Impact, cutting depth is also unsuitable excessive.Through test of many times, on the premise of meeting machining accuracy, rotating speed is 40r/min, The amount of feeding is 0.1mm/r, and cutting depth is less than 0.25mm.

5th, bore hole, Milling Process

The design of fixture during the end face of processing big end

Workpiece big end end face has aperture at XX, groove at X, and big end is cylindrical breach at X.When processing large end face, for preventing Cutter drill thrust makes the big end of workpiece deform, and therefore devises special fixture, reduces workpiece deformation, as shown in Figure 5.Fixture is held with big Inner face is to support, and small end inner circle is seam, and compression is big to hold end face.Inside support base, aperture is used for boring boring large end face hole operation, When preventing boring, bore and hinder fixture, there is breach in outside, for the cylindrical gap procedures in the big end of milling, gland has corresponding breach, For milling large end face groove operation.Fixture meets three operation use requirements, and the quantity reducing special fixture is it is ensured that fixture manufacture section While point, also save cost.Using fast replacing device can make fixture can in the case of not dismantling panel nut quick-replaceable Workpiece, the processing of convenient scene.

The design of fixture during processing small end end face:Small end is evenly equipped with XX Φ XX aperture, and end face has XX groove, and cylindrical have XX Place's lace, is also evenly equipped with XX Φ X aperture on small end inner face, has lace at XX inside inner face.Because allowance is big, And existing drilling and turning, there is Milling Machining it is therefore desirable to fully be supported to small end again, with the less knife that shakes, control workpiece deformation. Due to the big end of workpiece under, small end upper it is therefore desirable to design special construction fixture.

This fixture upper end supporting surface is two dismountable half ring type structures, puts the workpiece in after in fixture, then adjusts Support face supports workpiece small end lower surface, and with screw, supporting surface is fixed on fixture.In brill boring small end end-face hole and small end During the end-face hole of end, compress small end end face with special pressing plate.In processing small end end face groove, the cylindrical lace of small end, small end inner face During the lace of side, pass through small end end-face hole by Work-sheet pressing on fixture with screw, special pressing plate of dismantling, start to process.Fixture Meet five operation use requirements, greatly reduce special tooling quantity, reduce frock manufacturing cost.Work using the processing of this frock Part, high in machining efficiency, surface quality is good, and workpiece deformation is also adequately controlled.

Boring, Milling Process:When the big end of processing and small end, for the shadow controlling cutting force that workpiece is deformed further Ring, therefore adopt multiple reaming processing and layering processing.

Taking process big end end-face hole and assume Φ 12.3+0.0180mm as a example:First got ready using Φ 7mm centre drill, Ran Houyong Φ 9mm bit bore, Φ 11.5mm milling cutter first time reaming, Φ second reaming of 12mm milling cutter, then use boring blade bore hole extremely Φ 12.20~12.25mm, is finally reamed to qualified with Φ 12.3050-0.005mm cylindrical handle reamer.Each drilling amount is all very Little, the drill thrust that workpiece is subject to less, controls the deformation in bore hole for the workpiece to greatest extent.In the cylindrical lace of milling small end, adopt Processed with every layer, cut 0.5mm every time, point one lace of 5 roughing, and again to lace after institute's laciness completion of processing Carry out a finish-milling, the lace being finally completed no chatter mark, surface quality is high.

Through the cylinder shaft-like work processed using above step, cylinder shaft distortion has obtained good control, the cylinder axle work of processing Part meets drawing requirement, breaches the technical bottleneck of high temperature alloy thin wall cylinder shaft distortion, can promote the use of, be in identical jobs Similarity piece processing provides referential experience, improves manufacturing technology level, has far-reaching significance and certain economy effect Benefit.

Claims (1)

1. a kind of high accuracy thin wall cylinder axle control deformation processing method it is characterised in that:Described high accuracy thin wall cylinder axle control Making the processing method deforming is:
1) determine process program:Because workpiece belongs to thin-wall part, it is necessary for when starting and formulating process route considering to control deformation;
Workpiece material is high temperature alloy, and when processing, cutting force is big, easily accumulates larger Machining stress, in order to subtract to greatest extent The impact that little Machining stress deforms to workpiece, process route is scheduled that hidden lino removal twice:Through the ultrasonic corrugated of car, slightly Che Hou, workpiece every side residue 2~3mm surplus, workpiece removal material is many, and accumulation Machining stress is big, now carries out eliminating for the first time Stress heat treatment, eliminates the stress of former procedure accumulations;After half smart car, each side surplus is strict controlled in 1mm, then carries out one Secondary hidden lino removal, the Machining stress accumulated in release workpiece, the shadow that when controlling smart car, Machining stress deforms to workpiece Ring;
Because workpiece 1.8-2mm, for ensureing the machining accuracy of this size, interior outer mold surface is processed in same operation, subtracts Few impact to each dimensional accuracy for the repeated clamping;Simultaneously because processing at one time interior outer mold surface, the technical conditions of correlation It is guaranteed;
2) determine anti-deformation fixture structure:Determine clamping workpiece mode, improve fixture fixture scheme, outer mold surface in smart car, Processing large end face hole slot, processing small end face hole slot adopt distortion-free special fixture, and the deformation solving to cause during work pieces process is asked Topic;
In smart car, during outer mold surface, general fixture is carried out using inside and outside pressing plate or gland, because this workpiece is too thin, poor rigidity, It is also easy to produce chatter mark, workpiece is also yielding, a lot of required precision higher dimensional and technical conditions cannot ensure during processing;Devise one Set special-purpose vehicles processing type face fixture, with dismountable cylindrical support, one group of dismountable inner support, the conical surface supports, to reduce Parts fixation deforms;Exclusive clamps have position portion, clamping device, hold down gag, also support meanss;Fixture has 4 groups of pressing plates, 4 independent dismountable cylindrical supports, one group of dismountable inner support, the conical surface supports, end face gland etc., mainly adopts pressing plate Compression, then coordinate inside and outside circle Auxiliary support, to ensure clamping quality, reduce Workpiece vibration, control workpiece deformation;Using this set folder Tool processing workpiece, workpiece is accomplished fully to support, and deformation has obtained effective control;
Large end face is the axial benchmark of whole workpiece, and required precision is high;When processing large end face, cutter drill thrust makes the big end of workpiece Yielding it is impossible to meet large end face high-precision requirement, fixture, reduce workpiece deformation;Fixture is with big end inner face for support, small end Inner circle is seam, and compression is big to hold end face;Inside support base, aperture is used for boring boring large end face hole operation, when preventing boring, bores wound folder Tool, there is breach in outside, for the cylindrical gap procedures in the big end of milling, gland has corresponding breach, for milling large end face groove work Sequence;Fixture meets three operation use requirements;
Small end face has higher technical conditions to require to large end face;During processing small end face, because allowance is big, and existing brill boring Processing, has Milling Machining, small end face is yielding again, it is difficult to ensure that the relative requirement with large end face;It is thus desirable to filling to small end Sub-support, with the less knife that shakes, controls workpiece deformation;This fixture upper end supporting surface is two dismountable half ring type structures, by work After part is put in fixture, then adjust supporting surface support workpiece small end lower surface, and with screw, supporting surface is fixed on fixture;? When boring boring small end end-face hole and small end the inner end-face hole, compress small end end face with special pressing plate;In processing small end end face groove, small end Inside cylindrical lace, small end inner face during lace, with screw pass through small end end-face hole by Work-sheet pressing on fixture, dismantle special Pressing plate, start process;Fixture meets five operation use requirements;
3) cutting tool, machined parameters are optimized;Tool radius are too small, the corresponding also very little of cutting depth, and stock-removing efficiency is not high, and The blade because the reason material is very hard gives up very much, tool radius are excessive, and cutting contact surface is big, and cutting force is also very big, easily causes The deformation of thin-wall part;According to work status, in conjunction with practical situation, the cutter being finally suitable for;Rotating speed is high, the amount of feeding big although can To improve stock-removing efficiency, but the material of excision is many within the unit interval, and workpiece conduction of heat is insufficient, the Machining stress of accumulation Greatly it is easy to lead to thin-wall part to deform;Cutting depth is restricted by tool radius, and cutting depth will directly affect workpiece and be subject to Cutting force because the tool radius selected are only 0.4mm, and in order to reduce the impact to thin-wall part for the cutting force, cutting depth Also unsuitable excessive;On the premise of meeting machining accuracy, select suitable cutting parameter;
4) carry out testpieces test, grope to process rule:After processing experiment solves outer mold surface in smart car, processes big small end The impact that workpiece is deformed;Solve the problems, such as to process chatter using new construction fixture;Cutter is selected by processing experiment Feasibility, the reasonability of cutting parameter;When the big end of processing and small end, because of the thin poor rigidity of workpiece wall, according to normal Milling Machining Workpiece end face has deformation, for the impact controlling cutting force that workpiece is deformed further, therefore adopts multiple reaming processing and divides Layer processing;Size and technical conditions all meet drawing requirement after testing;
5) after testpieces pass the test, more formally process subsequent workpiece, using the process route same with testpieces, clamping side Formula, process tool, cutting parameter.
CN201510831008.7A 2015-11-24 2015-11-24 Machining method for deformation control of high-precision thin-wall cylinder shaft CN106425286A (en)

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CN106808165A (en) * 2017-02-28 2017-06-09 中航湖南通用航空发动机有限公司 The processing method of impeller outer cover in a kind of aero-engine
CN107803634A (en) * 2017-11-10 2018-03-16 中国航发动力股份有限公司 Hanging thin-wall shaft sleeve processing method among a kind of two supports
CN108480923A (en) * 2018-03-14 2018-09-04 西安北方光电科技防务有限公司 A kind of precision machined method of large thin-wall revolving parts
CN108637612A (en) * 2018-05-16 2018-10-12 遵义市遵云制冷配件有限公司 A kind of processing technology of aero-engine piston
CN108890225A (en) * 2018-06-29 2018-11-27 航天材料及工艺研究所 A kind of low deformation processing method of thin-walled large area abnormal shape composite material casing
CN108942088A (en) * 2017-05-23 2018-12-07 中国航空工业集团公司西安飞行自动控制研究所 A kind of boring-mill work method of high-precision semicircle orifice group
CN109079450A (en) * 2018-10-29 2018-12-25 湖南南方通用航空发动机有限公司 A kind of processing technology of aero-engine thin-walled diffuser lid
CN109396766A (en) * 2018-11-30 2019-03-01 河南红宇精密机械有限公司 A kind of thin-wall case processing technology
CN109514182A (en) * 2018-12-28 2019-03-26 湖北三江航天红阳机电有限公司 A kind of processing method of the thin-wall aluminum alloy with petal L-type end frame
CN109746685A (en) * 2018-11-29 2019-05-14 中国航发沈阳黎明航空发动机有限责任公司 The processing method that high-precision high temperature alloy thin-walled double-vane installs the control deformation of side diskware
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CN106808165A (en) * 2017-02-28 2017-06-09 中航湖南通用航空发动机有限公司 The processing method of impeller outer cover in a kind of aero-engine
CN108942088A (en) * 2017-05-23 2018-12-07 中国航空工业集团公司西安飞行自动控制研究所 A kind of boring-mill work method of high-precision semicircle orifice group
CN108942088B (en) * 2017-05-23 2020-09-22 中国航空工业集团公司西安飞行自动控制研究所 Boring and milling method for high-precision semicircular hole group
CN107803634A (en) * 2017-11-10 2018-03-16 中国航发动力股份有限公司 Hanging thin-wall shaft sleeve processing method among a kind of two supports
CN108480923A (en) * 2018-03-14 2018-09-04 西安北方光电科技防务有限公司 A kind of precision machined method of large thin-wall revolving parts
CN108480923B (en) * 2018-03-14 2020-01-10 西安北方光电科技防务有限公司 Method for precisely machining large thin-wall revolving body part
CN108637612A (en) * 2018-05-16 2018-10-12 遵义市遵云制冷配件有限公司 A kind of processing technology of aero-engine piston
CN108890225A (en) * 2018-06-29 2018-11-27 航天材料及工艺研究所 A kind of low deformation processing method of thin-walled large area abnormal shape composite material casing
CN109079450A (en) * 2018-10-29 2018-12-25 湖南南方通用航空发动机有限公司 A kind of processing technology of aero-engine thin-walled diffuser lid
CN109079450B (en) * 2018-10-29 2019-12-27 湖南南方通用航空发动机有限公司 Machining process of thin-wall diffuser cover of aircraft engine
CN109746685A (en) * 2018-11-29 2019-05-14 中国航发沈阳黎明航空发动机有限责任公司 The processing method that high-precision high temperature alloy thin-walled double-vane installs the control deformation of side diskware
CN109396766A (en) * 2018-11-30 2019-03-01 河南红宇精密机械有限公司 A kind of thin-wall case processing technology
CN109514182B (en) * 2018-12-28 2020-05-26 湖北三江航天红阳机电有限公司 Processing method of thin-wall aluminum alloy L-shaped end frame with petals
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CN111037226A (en) * 2019-12-19 2020-04-21 北京精密机电控制设备研究所 Processing method of titanium alloy thin-wall part

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Application publication date: 20170222