CN104690511B - The outer square structure method for fine finishing of slender type, thin-walled stepped hole type inner circle - Google Patents
The outer square structure method for fine finishing of slender type, thin-walled stepped hole type inner circle Download PDFInfo
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- CN104690511B CN104690511B CN201510077644.5A CN201510077644A CN104690511B CN 104690511 B CN104690511 B CN 104690511B CN 201510077644 A CN201510077644 A CN 201510077644A CN 104690511 B CN104690511 B CN 104690511B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The outer square structure method for fine finishing of slender type, thin-walled stepped hole type inner circle, the non-ferrous metal finishing technology field belonged in field of machining, technical problem to be solved be to provide it is a kind of can machining high-precision stainless steel, outside inner circle square half-blind hole structure thin-walled component of rod category processing method, the technical scheme of use：Interior hole machined is carried out according to the following steps：The first step, rough turn process is performed to foreign round；Second step, half smart car, smart car, precision grinding process are performed successively to cylindrical after the first step；3rd step, to after second step cylindrical execution artificial aging handle；4th step, use hone Hole honing；Foreign side's processing is carried out according to the following steps：The first step, using built-up jig clamping workpiece；Second step, pass through mandrel and position foreign side machining benchmark；3rd step, wire cutting foreign side；4th step, to after the 3rd step foreign side perform artificial aging processing；5th step, half fine grinding foreign side；6th step, fine grinding foreign side, the present invention are applied to the finishing of inner circle foreign side.
Description
Technical field
The outer square structure method for fine finishing of slender type, thin-walled stepped hole type inner circle, belonging in field of machining has coloured gold
Belong to finishing technology field.
Background technology
Easily there is deformation, knife phenomenon of shaking because wall is thin, poor rigidity in thin-walled component of rod category in processing, with conventional method plus
Work is relatively difficult, and crudy is difficult to ensure that.Following processing method is typically used to this kind of part：A. surplus is gone inside and outside elder generation；b.
Endoporus is worked into size；C. layering turning, approaches intended size；D. mandrel turning is matched somebody with somebody.The country is to thin walled bar class zero at present
The processing of part, mainly common alloy steel, it is inside and outside be circular cover parts, for outside stainless steel, inner circle square half
The thin-walled component of rod category of blind hole structure is not strong using general processing method realizability.
Super large is can be summarized as this workpiece of thin-walled component of rod category of square half-blind hole structure outside stainless steel, inner circle
Draw ratio slender rod type structure, slender type endoporus is always technique processing difficulties, and is again staircase structural model, causes the other end
Oral area is smaller can not smoothly chip removal so that iron filings are particularly easy to scratch square set inwall；Required when foreign side is ground relative in workpiece
Round symmetry is 0.01, and mandrel can only be positioned at one end as the benchmark of grinding foreign side, because square set external structure is one end
Circle one end side, one end is positioned it is difficult to ensure that Workpiece Machining Accuracy, the clamping tooling used carries flat-nose pliers for equipment, and precision exists
0.02 or so, less desirable, generally speaking foreign side's grinding is it is difficult to ensure that symmetry.
Honing technique is a kind of special shape of grinding, is a kind of high-efficiency machining method in finishing again.It is this
Technique be it is a kind of improve parts size precision, effective processing method of geometrical precision and surface roughness, be one kind with quilt
Machined surface under certain feed pressure, passes through instrument as guide-localization face（Oilstone）Relative motion with part removes surplus,
Its Cutting trajectory is efficient, the precise machining process of overlapping curve.For through hole part, its standard honing core shaft（Machine tool accessory）Head
Portion position is all designed beyond oilstone front end face, and the purpose so designed is exactly that, at top gem of a girdle-pendant hole, its mandrel head can be used as top gem of a girdle-pendant hole and lead
Xiang Yong.If can typically meet technological requirement using honing technique processing through hole, but blind-hole type step hole workpiece is for the top gem of a girdle-pendant
Grinding process is a technical barrier, even if using best equipment, processing blind hole all can be more much more difficult than processing through hole.
The content of the invention
The technical problems to be solved by the invention are to provide one kind being capable of machining high-precision stainless steel, square outside inner circle
The processing method of half-blindness pore structure thin walled bar class part.
In order to solve the above technical problems, the technical solution adopted by the present invention：Slender type, thin-walled stepped hole type inner circle foreign side knot
Structure method for fine finishing, interior hole machined is followed the steps below：
The first step, perform rough turn process to foreign round, and cylindrical surplus 2mm is increased in rough turn process；
Second step, half smart car, smart car, precision grinding process are performed successively to cylindrical after the first step；
3rd step, to after second step cylindrical execution artificial aging handle, aging temp be 125 degree, the time be 6 hours；
4th step, use hone Hole honing；
5th step, car mandrel；
6th step, half fine cylindrical；
7th step, fine cylindrical；
Foreign side's processing is followed the steps below：
The first step, using built-up jig clamping workpiece；
Second step, pass through mandrel and position foreign side machining benchmark；
3rd step, wire cutting foreign side；
4th step, to after the 3rd step foreign side perform artificial aging processing, aging temp be 125 degree, the time be 6 hours；
5th step, half fine grinding foreign side；
6th step, in advance fine grinding mill car platform plane, then refine foreign side, cutting output is set under the premise of rotating speed is constant
0.005mm, and grinding process must be through commonly using diamond tool grinding wheel.
Compared to the prior art the present invention has the advantages that.
First, it is the roughness of hole machined in ensureing, processing inner circle uses standard concordant with oilstone bottom after topping
Hone, under oilstone and mandrel all abrasion conditions, when carving sub- hook oilstone rising outward, carves sub- hook front portion and should not exceed
Front tool face.When load pressure and change in location, carve sub- hook and all must reach on oil stone base branch at distance wider two
Seat is to keep stabilization of the oilstone in honing.The two separated bearings can be prevented on oilstone inclination and one end on oil stone base
Stick up oilstones and lead boots leading section no more than honing core shaft when swelling.Oilstone is using the higher hardhead oilstone of hardness, to offset
Unnecessary stock removal during honing blind hole needed for the part oilstone；Oilstone on hone and boots are led with inner hole of workpiece in radial direction side
To for three point contact to keep stability hone of the workpiece on hone by the constant pressure that sets, even if
When removing surplus aperture increases, it can also make oilstone and lead boots and stably act on inner hole of workpiece surface, so as to maintain zero
The stability of part in process；
For the cylindricity of hole machined in ensureing, suitably increase what cylindrical surplus 2mm produced to make up instrument in preceding working procedure
Form and position tolerance, in addition, after roughing, before semifinishing and finishing, increase Ageing Treatment respectively, to discharge machining stress,
Reducing distortion；
Endoporus cylindricity and roughness are detected with cylindricity instrument after machining, meet drawing requirement not
More than 0.01 cylindricity requirement, and no more than 0.4 roughness requirements.Multiple production practices are proved, using the top gem of a girdle-pendant of the present invention
Grinding process can fundamentally solve the problems, such as general turnery processing because that can not arrange the scuffing barrel caused by cutting.
2nd, square set is in processing, and mandrel is as the benchmark of grinding foreign side, and traditional approach is one end positioning, and the present invention passes through
Add section is cylindrical to realize that two ends are positioned to mandrel one end, good positioning effect so that the machining accuracy of the outer square structure in the middle of grinding is big
It is big to improve；After the completion of grinding, lengthening section is removed, it is easy to use；
The clamping tooling used at present during grinding carries flat-nose pliers for equipment, and precision is less desirable 0.02 or so, examination
Test in part production, using built-up jig clamping workpiece, i.e., on the basis of using existing flat-nose pliers, while in workpiece two ends cushioning pad
Block, can prevent that emery wheel walks out-of-date workpiece to be influenceed to reduce machining accuracy by cutting force, is adopted because two ends are hanging in workpiece process
Prove that precision can be brought up within 0.01 through test of many times with built-up jig clamping workpiece；
One of grinding shaping of former technique is refined as half fine grinding, fine grinding shaping, it is constant in rotating speed（1440r/
min）On the premise of, fine grinding cutting output is set to 0.005mm, grinding deformation is reduced, grinding accuracy is improved；
Because grinding workpiece uses white fused alumina emery wheel, and workpiece material is technological requirement palpus in 4Cr13, grinding process
Through conventional diamond tool grinding wheel, the iron filings being bonded on emery wheel can be so removed；For mill car platform, then it must add every time
Before work workpiece, plane is refined, so can be to ensure initial plane degree requirement；
Improved by above-mentioned foreign side's grinding technique, testpieces symmetry all meets drawing requirement.
Brief description of the drawings
Fig. 1 is the structural representation of honing core shaft before improving.
Fig. 2 is the structural representation of honing core shaft after improving.
Fig. 3 is the stereogram of built-up jig after improving.
Fig. 4 is the structural representation of built-up jig after improving.
In figure, 1 is oilstone, and 2 be mandrel head, and 3 be workpiece, and 4 be the first cushion block, and 5 be the second cushion block, and 6 be built-up jig.
Embodiment
As Figure 1-Figure 4, the outer square structure method for fine finishing of slender type, thin-walled stepped hole type inner circle, interior hole machined according to
Following steps are carried out：
The first step, perform rough turn process to foreign round, and cylindrical surplus 2mm is increased in rough turn process；
Second step, half smart car, smart car, precision grinding process are performed successively to cylindrical after the first step；
3rd step, to after second step cylindrical execution artificial aging handle, aging temp be 125 degree, the time be 6 hours；
4th step, use hone Hole honing；
5th step, car mandrel；
6th step, half fine cylindrical；
7th step, fine cylindrical；
Foreign side's processing is followed the steps below：
The first step, using built-up jig clamping workpiece；
Second step, pass through mandrel and position foreign side machining benchmark；
3rd step, wire cutting foreign side；
4th step, to after the 3rd step foreign side perform artificial aging processing, aging temp be 125 degree, the time be 6 hours；
5th step, half fine grinding foreign side；
6th step, in advance fine grinding mill car platform plane, then refine foreign side, cutting output is set under the premise of rotating speed is constant
0.005mm, and grinding process must be through commonly using diamond tool grinding wheel.
The hone is the standard honing core shaft of topping, and the standard honing core shaft end after topping
Concordant with oilstone bottom, the oilstone is the hardhead oilstone higher than common oilstone hardness.
The present invention improves hone by the way that interior hole machined is changed into honing by traditional articulation, meets inner hole precision
It is required that, can fundamentally it solve the problems, such as because articulation hole can not arrange the scuffing barrel caused by cutting；By improving positioning datum, changing
Enter clamping tooling, select optimal grinding parameter, control grinding deformation, meet foreign side's required precision.Demonstrate,proved by test of many times
It is bright, technological requirement is all met using internal, outer square set foreign side grinding of the invention.
Claims (1)
1. the outer square structure method for fine finishing of slender type, thin-walled stepped hole type inner circle, it is characterised in that interior hole machined is according to following step
It is rapid to carry out：
The first step, perform rough turn process to foreign round, and cylindrical surplus 2mm is increased in rough turn process；
Second step, half smart car, smart car, precision grinding process are performed successively to cylindrical after the first step；
3rd step, to after second step cylindrical execution artificial aging handle, aging temp be 125 degree, the time be 6 hours；
4th step, using hone Hole honing, the hone is the standard honing core shaft of topping, and cuts
Except the standard honing core shaft end behind head is concordant with oilstone bottom, the oilstone is the hardhead oil higher than common oilstone hardness
Stone；
5th step, car mandrel；
6th step, to the 4th step process after the fine cylindrical of workpiece half；
7th step, to the 6th step process after workpiece fine cylindrical；
Foreign side's processing is followed the steps below：
The first step, using built-up jig clamping workpiece, the built-up jig clamping workpiece be using on the basis of existing flat-nose pliers,
Simultaneously in workpiece two ends cushioning cushion block；
Second step, pass through mandrel and position foreign side machining benchmark；
3rd step, wire cutting foreign side；
4th step, to after the 3rd step foreign side perform artificial aging processing, aging temp be 125 degree, the time be 6 hours；
5th step, half fine grinding foreign side；
6th step, in advance fine grinding mill car platform plane, then refine foreign side, are cut under the premise of 1440r/min fixed rotating speed
Amount is set to 0.005mm, and grinding process must use diamond tool grinding wheel, and the emery wheel is white fused alumina emery wheel and workpiece material
Expect for 4Cr13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510077644.5A CN104690511B (en) | 2015-02-13 | 2015-02-13 | The outer square structure method for fine finishing of slender type, thin-walled stepped hole type inner circle |
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| CN201510077644.5A CN104690511B (en) | 2015-02-13 | 2015-02-13 | The outer square structure method for fine finishing of slender type, thin-walled stepped hole type inner circle |
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| CN104690511B true CN104690511B (en) | 2017-11-03 |
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| CN106541290A (en) * | 2017-01-23 | 2017-03-29 | 苏州经贸职业技术学院 | A kind of jig of the circumferential registration for thin-wall part processing |
| CN109590821B (en) * | 2018-11-22 | 2021-03-30 | 成都飞机工业（集团）有限责任公司 | Excircle precision grinding method of super-long-diameter cutter |
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| CN103659158A (en) * | 2013-12-05 | 2014-03-26 | 重庆跃进机械厂有限公司 | Method for machining ultrathin wall sleeve parts |
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Address after: No. 6 mailbox of Changzhi City, Shanxi Province, Shanxi Co-patentee after: China Academy of Launch Vehicle Technology Patentee after: Shanxi spaceflight Qinghua Equipment Co., Ltd. Address before: No. 6 mailbox of Changzhi City, Shanxi Province, Shanxi Co-patentee before: China Academy of Launch Vehicle Technology Patentee before: Qinghua Machinery Plant, Changzhi |