CN104174915A - Milling method of multi-cavity cylinder - Google Patents
Milling method of multi-cavity cylinder Download PDFInfo
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- CN104174915A CN104174915A CN201410350327.1A CN201410350327A CN104174915A CN 104174915 A CN104174915 A CN 104174915A CN 201410350327 A CN201410350327 A CN 201410350327A CN 104174915 A CN104174915 A CN 104174915A
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Abstract
The invention relates to a milling method of a multi-cavity cylinder. When milling is performed for external cavities of the cylinder, the clamping mode of clamping and support is adopted; and if the cylinder is relatively long, an auxiliary support is added in the middle of the cylinder. Cavities at the two ends and cavities in the middle are made in sequence diagonally through milling; when a guide groove is made through milling, the rough milling adopts the segmented milling; the guide groove is not made through in the clamping portions; and when the fine milling is performed, the guide groove is made through. A destressing procedure is arranged between the rough milling procedure and fine milling procedure. As the clamping mode of clamping and support is adopted, the rigidity of the two ends of the cylinder is enhanced; and the rigidity of the cylinder in the milling process is improved because the cavities at the two ends and the cavities in the middle are made in sequence through milling. The internal stress generated by making two diagonal cavities can be partly counteracted through the diagonal milling, so that the deformation caused by the milling is reduced.
Description
Technical field
The present invention relates to the method for milling of cylinder body, specifically a kind of milling deformation control method of cavity cylinder body.
Background technology
Cylinder body is mainly that guiding piston carries out linear reciprocating motion therein, and the interior of pressed gas can be converted to mechanical energy, and cylinder inner bore is working surface of piston, and required precision is high.Based on the requirement of lightweight and stability, cylinder body adopts thin-wall construction more, and profile arranges longitudinally and transverse frame, and the staggered rib of cylinder body outside forms multiple die cavities, and part cylinder body is also provided with axially directed groove, complex contour.Because mechanical castings is relatively poor, the cylinder body raw material that therefore requirement of strength is higher adopt bar or materials in the tube mostly, and the outside die cavity of cylinder body and gathering sill adopt milling to form.
Processing inner hole precision requires high, and profile is formed the cylinder body of multiple die cavities by the rib that interlocks, and Major Difficulties is how machining deformation amount is controlled to less scope.Machining deformation control method is specifically related to select rational cutter, cutting data, thick fine finishining arrangement, allowance distribution, installation way, milling order, removes tension type (as heat treatment, vibration, deep cooling processing) and opportunity etc.Work in-process, the outside die cavity operation of milling removal amount is large, and the residual stress of generation is large, is the key link that causes block distortion, affects cylinder inner bore precision, is also the emphasis of Deformation control simultaneously.
Traditional cylinder body contour milling method is at present: by the least possible clamping times, and the allowance that milling is whole.In order to shorten milling route, the milling of each die cavity employing order, guide-track groove adopts the method for successively evenly going amount.This method is applicable to the cylinder body that processing axial length is short, wall thickness is thicker, precision is lower, and to cavity structure complexity, the high Thin Wall Cylinder Blocks of required precision, milling distortion is larger, is difficult to meet cylinder hole precision.If reduce Milling Parameters in order to control distortion simultaneously, part working (machining) efficiency is too low, cannot meet again the demand of batch production.
Summary of the invention
The technical problem to be solved in the present invention is to provide the method for milling of the cavity cylinder body that a kind of block distortion amount is little.
For solving above technical problem, the method for milling of a kind of cavity cylinder body of the present invention, in the middle of each die cavity adopts behind first two ends, the order of diagonal angle milling; When milling gathering sill, rough mill employing step-cut milling, gathering sill is logical in clamping not milling of position, the logical method of milling again when finish-milling.
Before processing, first by consulting materials processing handbook, according to the material of cylinder body, determine thick accurately machined allowance, milling cutter, then according to the feature of process equipment, in conjunction with empirical data, select rational Milling Parameters.Milling order in the middle of behind first two ends has improved cylinder body self rigidity in milling process.Diagonal angle milling makes the internal stress that two diagonal angle pocketings produce can partial offset, and the deflection that therefore milling causes reduces.
As the preferred technical scheme of one, the installation way that adopts a folder one to push up when the outside die cavity of milling cylinder body.The installation way that adopts folder one top, has strengthened the rigidity at cylinder body two ends.
As the preferred technical scheme of another kind, when cylinder body is longer, in the middle of cylinder body, increase supplemental support, strengthen the rigidity at cylinder body middle part.
As another preferred technical scheme, arrange destressing operation rough milling, between finish-milling operation.
In addition, adopt the method for milling of cavity cylinder body of the present invention, the distortion can be to cylinder body milling time is controlled, and deflection is reduced.Convenient mounting and clamping, in part milling process, rigidity is stronger, and cutting data can suitably increase, and working (machining) efficiency improves approximately 10% than conventional method, and processing cost is lower.
Brief description of the drawings
Fig. 1 is the structure intention of cylinder body.
Fig. 2 is E-E cutaway view of Fig. 1.
Fig. 3 is the schematic diagram at the logical position of milling not after rough milling.
In figure, 1-flange, 2-transverse frame, 3-longitudinally rib, 4-gathering sill, 5-cylinder hole, F and G represent the not logical position of milling, two places.
Detailed description of the invention
Be example in conjunction with the cylinder body described in Fig. 1, the method that the present invention is claimed is done to further clear, complete explanation.
Cylinder body as depicted in figs. 1 and 2, material is aluminium alloy, in the middle of cylinder body, is provided with cylinder hole 5, and two ends are provided with flange 1, and external diameter one side is provided with gathering sill 4 vertically, and external form is connected to form 12 outside die cavities by longitudinal rib 3 and transverse frame 2.In order to distinguish each die cavity, on radial section, represent with ABCD, axially express with I, II, III, 12 die cavities are designated as respectively: I A, I B, I C, I D, II A, II B, II C, II D, III A, III B, III C, III D.
When the outside die cavity of milling, select vertical machining centre, a folder one top clamping workpiece.In the middle of cylinder body, increase supplemental support.Each die cavity in the middle of adopting behind first two ends to angular milling mode, milling order is: I A-III D-I C-III B-I B-III C-I D-III A-II A-II D-II B-II C.Cutter adopts the alloy milling cutter of φ 20, coarse milling parameter: speed of mainshaft S=5000rev/min, amount of feeding V=3000mm/rev, cutting depth ap=1mm.
While rough milling gathering sill, vertical transverse frame 2 places of clamping two places, carry out milling to 4 points 3 sections of gathering sills, and as shown in Figure 3, clamping position F and not milling of G are logical.When finish-milling gathering sill 4, adopt the installation way on folder one top, gathering sill 4 millings are become.Rough mill the logical part of not milling and improved the distribution of milling residual stress, block distortion amount is reduced.
Between thick, finish-milling cylinder body profile, arrange heat treatment to remove forming residual stress.After destressing is processed, detect block distortion amount and be less than 0.15mm.
If adopt traditional method for milling, outside pocketing order is: I A-I B-I C-I D-II A-II B-II C-II D-III A-III B-III C-III D.This milling order makes cutter path the shortest, can raise the efficiency, but the stress producing is vertically large and concentrated.In the time of 4 die cavities of last group of milling, because the milling of middle die cavity is complete, the rigidity variation of cylinder body, the deflection therefore producing increases.Through destressing processing, detect deflection and be about 1.5mm.
Adopt the mode (cutter, cutting parameter, installation way etc. are all constant) of milling provided by the invention, through destressing processing, detecting deflection is only 0.15mm.
Claims (4)
1. a method for milling for cavity cylinder body, is characterized in that: in the middle of each die cavity adopts behind first two ends, the order of diagonal angle milling; When milling gathering sill, rough mill employing step-cut milling, gathering sill is logical in clamping not milling of position, the logical method of milling again when finish-milling.
2. the method for milling of cavity cylinder body according to claim 1, is characterized in that: the installation way that adopts a folder one to push up when the outside die cavity of milling cylinder body.
3. the method for milling of cavity cylinder body according to claim 1, is characterized in that: when cylinder body is longer, increase supplemental support in the middle of cylinder body.
4. the method for milling of cavity cylinder body according to claim 1, is characterized in that: arrange destressing operation rough milling, between finish-milling operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410350327.1A CN104174915B (en) | 2014-07-23 | 2014-07-23 | A kind of method for milling of cavity cylinder body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410350327.1A CN104174915B (en) | 2014-07-23 | 2014-07-23 | A kind of method for milling of cavity cylinder body |
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| CN104174915A true CN104174915A (en) | 2014-12-03 |
| CN104174915B CN104174915B (en) | 2016-08-31 |
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| CN201410350327.1A Active CN104174915B (en) | 2014-07-23 | 2014-07-23 | A kind of method for milling of cavity cylinder body |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105935857A (en) * | 2015-03-02 | 2016-09-14 | 通用汽车环球科技运作有限责任公司 | Stress relief of mechanically roughened cylinder bores for reduced cracking tendency |
| CN107900424A (en) * | 2017-12-28 | 2018-04-13 | 华东泰克西汽车铸造有限公司 | A kind of cylinder body fleshiness machining process |
| CN109434168A (en) * | 2018-11-23 | 2019-03-08 | 山西航天清华装备有限责任公司 | A kind of processing method of weak rigid I-shaped component |
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| JP2005503929A (en) * | 2001-09-27 | 2005-02-10 | アーツェーテック・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング−アドヴァンスト・キャスティング・テクノロジーズ・ギーセライテヒノロギー | Mold milling method |
| CN101602122A (en) * | 2009-07-15 | 2009-12-16 | 天津商业大学 | A kind of precision numerical control milling method for thin-wall parts |
| CN101733461A (en) * | 2008-11-12 | 2010-06-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Sectional rigid milling process for integrated impeller blade |
| CN102581362A (en) * | 2012-03-22 | 2012-07-18 | 沈阳飞机工业（集团）有限公司 | Method for processing part with thin wall and changed-angle curved surface appearance |
| CN103567705A (en) * | 2013-10-11 | 2014-02-12 | 中航飞机股份有限公司西安飞机分公司 | Numerical control machining method of titanium alloy part with double-sided cavity thin web structure |
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2014
- 2014-07-23 CN CN201410350327.1A patent/CN104174915B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005503929A (en) * | 2001-09-27 | 2005-02-10 | アーツェーテック・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング−アドヴァンスト・キャスティング・テクノロジーズ・ギーセライテヒノロギー | Mold milling method |
| CN101733461A (en) * | 2008-11-12 | 2010-06-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Sectional rigid milling process for integrated impeller blade |
| CN101602122A (en) * | 2009-07-15 | 2009-12-16 | 天津商业大学 | A kind of precision numerical control milling method for thin-wall parts |
| CN102581362A (en) * | 2012-03-22 | 2012-07-18 | 沈阳飞机工业（集团）有限公司 | Method for processing part with thin wall and changed-angle curved surface appearance |
| CN103567705A (en) * | 2013-10-11 | 2014-02-12 | 中航飞机股份有限公司西安飞机分公司 | Numerical control machining method of titanium alloy part with double-sided cavity thin web structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105935857A (en) * | 2015-03-02 | 2016-09-14 | 通用汽车环球科技运作有限责任公司 | Stress relief of mechanically roughened cylinder bores for reduced cracking tendency |
| CN107900424A (en) * | 2017-12-28 | 2018-04-13 | 华东泰克西汽车铸造有限公司 | A kind of cylinder body fleshiness machining process |
| CN109434168A (en) * | 2018-11-23 | 2019-03-08 | 山西航天清华装备有限责任公司 | A kind of processing method of weak rigid I-shaped component |
| CN109434168B (en) * | 2018-11-23 | 2020-08-11 | 山西航天清华装备有限责任公司 | Processing method of weak-rigidity I-shaped component |
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| Publication number | Publication date |
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| CN104174915B (en) | 2016-08-31 |
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