CN101791718B - Milling process for obstructed sealing surface - Google Patents
Milling process for obstructed sealing surface Download PDFInfo
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- CN101791718B CN101791718B CN2009102733415A CN200910273341A CN101791718B CN 101791718 B CN101791718 B CN 101791718B CN 2009102733415 A CN2009102733415 A CN 2009102733415A CN 200910273341 A CN200910273341 A CN 200910273341A CN 101791718 B CN101791718 B CN 101791718B
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Abstract
The invention discloses a milling process for a sealing surface with an obstacle, which solves the problems that the existing milling process is low in processing precision, has cutter marks when being used for processing the sealing surface with the obstacle, and is easy to cause 'three leakage' after being installed. The technical scheme includes rough milling, semi-finish milling and finish milling, wherein in finish milling, after a milling cutter contacts a workpiece, the milling cutter firstly cuts into the workpiece in an asymmetric forward milling mode and mills to an obstacle position. The invention has the advantages of high processing precision, no tool mark on the processing plane, simple process and no three-leakage after installation.
Description
Technical field
The present invention relates to a kind of milling process, a kind of specifically milling process that the obstacle sealing surface is arranged.
Background technology
Milling Process can obtain higher metal resection rate and machining accuracy and good machined surface quality, therefore, receives in the manufacturing industry in modern times generally and paying attention to, and develops also quite rapid.With respect to traditional cut, cutting speed, feed speed all are greatly improved in the Milling Process, but for common continuous milling plane, adopt existing milling process can effectively guarantee machining accuracy.But for some special milling planes; Some planes on the engine cylinder-body for example; The oil cooler faying face of using like main cooling down high-temperature machine oil; Owing to need pass through face and the hard contact seal of face during assembling, therefore for this face is a sealing surface, its Milling Process quality directly influences the effect of cooling machine oil.But owing to have structures such as reinforcement, oil duct support on this face; This structure all protrudes in " barrier " that exists when the surface becomes the milling cutter cutting; In the operation, rough mill-half finish-milling-work flow of finish-milling, milling cutter can not carry out the through type milling to this face processing; Milling adopts asymmetric climb cutting worker to advance feed before " barrier " position; Cutter can only rest on the machined surface, promptly can only not go out the cutter milling, and the main shaft of controlling cutter then directly withdraws from or be fed into the intact Milling Process in this step of promptly accomplishing in workpiece top.In the end a step is during finish-milling; The plane does not go out cutter milling meeting and can't avoid on the machined surface around the barrier position, producing tool marks (referring to Fig. 4); When machined surface is the high sealing surface of requirement on machining accuracy; If adopt said method to carry out the processing of final step finish-milling, accomplish sealing surface after installing and occur " three leak " (leak, gas leakage, leakage of oil) problem easily.For example the faying face of oil cooler is adopting existing milling technology processing to have tool marks, often occurs the quality accident of leaking after the installation, and product percent of pass has only 20%.
Summary of the invention
The objective of the invention is in order to solve the problems of the technologies described above, providing a kind of does not have the milling process that tool marks, technology simply have the obstacle sealing surface to obstacle sealing surface machining accuracy height, processing plane.
Technical scheme comprise rough mill, half finish-milling and finish-milling, in the said finish-milling processing, behind the milling cutter contact workpiece; Earlier with asymmetric climb cutting incision workpiece; Milling mills out workpiece with asymmetric upmilling to the barrier position behind milling to the barrier position again, and said milling cutter is the CBN cutter.
Time cutter cutting output of said asymmetric upmilling is 0.010-015cm.
The cutting speed of said asymmetric upmilling is 900-1000mm/min.
Said have the obstacle sealing surface to be meant that processing plane is that the projection that is higher than the plane (for example being higher than the structure that the reinforcement, oil duct support etc. on plane can not milling) is arranged on sealing surface and the sealing face, and during milling, this projection becomes barrier can not pass through milling continuously.There is the obstacle sealing surface to add man-hour to this kind, when rough milling, can adopts the method that finishes milling with asymmetric climb cutting milling to barrier position to carry out with half finish-milling, but step during finish-milling in the end; If also promptly finish to the barrier position with asymmetric climb cutting milling, main shaft directly withdraws from or is fed into the workpiece top, and then milling cutter can stay obvious tool marks around barrier; If this moment is the reverse cutter that returns; Mill out workpiece by former processing circuit with asymmetric upmilling, the tool marks that stay in the time of then can eliminating climb cutting to barrier position fully, return the cutter cutting output this moment can not be too big; The purpose of this time cutter mode is a withdrawing; Be not fine finishining, so the arrangement of this time cutter cutting output is less, time cutter cutting output of preferred asymmetric upmilling is 0.010-015cm; And because time cutter cutting output is little; The cutting force that less cutting speed produces is bigger; Receive vibrations can influence the smoothness of machined surface processing; Cutting speed when therefore the cutting speed of said asymmetric upmilling is compared asymmetric climb cutting wants high, and the cutting speed of preferred asymmetric upmilling is 900-1000mm/min.Said CBN cutter is the cutter of cubic boron nitride material, and this material has durability height, advantage that cutting power is strong, is not only applicable to rough mill and finish-milling processing, also is specially adapted to return among the present invention the asymmetric upmilling that the cutter cutting output is little, cutting speed is high.
The present invention is especially to obstacle processing sealing surface is arranged; The obstacle sealing surface milling quality that has through milling process processing of the present invention is greatly improved, and the fine finishining precision can reach Ra 1.6-3.2 μ m, Ra behind time cutter＜no tangible lapping defect in 1.6 μ m surface; Do not damage barrier; Surface quality satisfies product requirement fully, and sealing surface is installed the back good sealing effect, can not have the problem of " three leak ".
Description of drawings
Fig. 1 is a cutting line sketch map of the present invention.
Fig. 2 is the engine cylinder block sealing surface design sketch after processing technology of the present invention is handled.
Fig. 3 is the local amplification effect figure of sealing surface.
Fig. 4 is for having the engine cylinder block sealing surface amplification effect figure after milling process is handled now.
Wherein 1-cylinder block, 2-cylinder block sealing surface, 3-oil duct support, the 4-milling cutter.
The specific embodiment
Is that example is described in detail technology of the present invention below in conjunction with accompanying drawing 1 with the milling fine finishining of engine cylinder block sealing surface 1.
Have the oil duct that protrudes in the plane to support 3 on the cylinder block sealing surface 2 of said engine cylinder block 1, this oil duct support 3 can not be carried out common through type milling process processing as barrier.
Processing technology is following:
1; Start milling machine; Earlier engine cylinder block sealing surface 2 is carried out conventional rough milling and half finish-milling; Method of operating is: behind milling cutter 4 (for the CBN cutter) contact workpiece with the beginning of a point earlier with asymmetric climb cutting incision workpiece, milling to oil duct support before 2 be the position of b point (being before oil duct supports 3) before the end milling, main shaft directly withdraws from or is fed into above the workpiece;
2, carry out the final step finish-milling again, method of operating is: behind milling cutter 4 contact workpieces; Cut workpiece with asymmetric climb cutting earlier with the beginning of a point; Cutting output is 0.4cm, and cutting speed is 700-750mm/min, when milling to oil duct supports 2 about 1/3 positions; Control milling cutter cutting output is 0.3cm, and continuing before milling to the oil duct support 2 is the position that b is ordered; Return cutter in b point position, mill out workpiece with asymmetric upmilling and promptly mill out this Milling Process of position completion that a is ordered, time cutter cutting output of asymmetric upmilling is 0.010-015cm, and cutting speed is 900-1000mm/min.
Sell the engine cylinder block sealing surface 1 (seeing Fig. 2 and Fig. 3) that mills after the processing, its surface quality satisfies product requirement fully, installs after detect and do not have " three leak " problem and take place, and product percent of pass is 100%.
Claims (3)
1. milling process that the obstacle sealing surface is arranged, comprise rough mill, half finish-milling and finish-milling, in the said finish-milling processing; Behind the milling cutter contact workpiece; With asymmetric climb cutting incision workpiece, milling is characterized in that to the barrier position earlier; Mill out workpiece with asymmetric upmilling again behind milling to the barrier position, said milling cutter is the CBN cutter.
2. the milling process of obstacle sealing surface is arranged like claim 1, it is characterized in that, time cutter cutting output of said asymmetric upmilling is 0.010-0.015cm.
3. according to claim 1 or claim 2 the milling process that the obstacle sealing surface is arranged is characterized in that the cutting speed of said asymmetric upmilling is 900-1000mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102733415A CN101791718B (en) | 2009-12-21 | 2009-12-21 | Milling process for obstructed sealing surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102733415A CN101791718B (en) | 2009-12-21 | 2009-12-21 | Milling process for obstructed sealing surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101791718A CN101791718A (en) | 2010-08-04 |
| CN101791718B true CN101791718B (en) | 2012-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102733415A Active CN101791718B (en) | 2009-12-21 | 2009-12-21 | Milling process for obstructed sealing surface |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925388A (en) * | 2019-12-23 | 2020-03-27 | 常州机电职业技术学院 | Method for solving oil leakage problem of trolley traveling vertical speed reducer of bridge crane |
| CN114309817B (en) * | 2022-03-03 | 2022-10-28 | 成都航天精诚科技有限公司 | Manufacturing and detecting method of high-precision large-specification strip-shaped workpiece |
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| CN101791718A (en) | 2010-08-04 |
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