CN102430784A - Eccentric machining method for excircle of piston - Google Patents
Eccentric machining method for excircle of piston Download PDFInfo
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- CN102430784A CN102430784A CN2010105022668A CN201010502266A CN102430784A CN 102430784 A CN102430784 A CN 102430784A CN 2010105022668 A CN2010105022668 A CN 2010105022668A CN 201010502266 A CN201010502266 A CN 201010502266A CN 102430784 A CN102430784 A CN 102430784A
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Abstract
The invention relates to an eccentric machining method for the excircle of a piston. The method comprises the following steps: positioning and straining a piston on a numerical control machine tool which has a revolving shaft; selecting a milling cutter according to machining efficiency, roughness of a machining surface and a machining material; constructing a mathematical model of the running track of the milling cutter and writing a program into the numerical control machine tool; inputting original data of each parameter; operating a macro program to machine the piston; completing machining as operation of the macro program finishes. According to the invention, the machining method can carry out eccentric edge-cutting machining on the excircle of a variety of pistons; operation is convenient; the defect of a long period in manufacture of turning tooling in conventional eccentric machining of pistons is overcome; flexibility of eccentric machining is realized; varieties of machining pistons greatly increase; on-site batch machining of pistons in enterprises can be carried out; product quality is easily guaranteed.
Description
Technical field:
The present invention relates to a kind of outside piston eccentric processing method, relate in particular to a kind of outside piston eccentric processing method of locomotive.
Technical background:
Piston is the heart of locomotive engine, in engine operation, bears the mechanical load and the thermic load of alternation, is one of worst key components and parts of condition of work in the engine.Along with the locomotive car load is more and more stricter to the requirement of dynamic property, economy, the feature of environmental protection and the reliability of engine; For reducing the frictional work loss of engine; Reduce oil consumption, noise and discharging, piston need have hear resistance, wearability, guidance quality and good sealing function stably.For satisfying above functional requirement; Piston adopts the light-high-strength new material mostly at present; And it also has very strong process characteristic aspect cut; Usually the cylindrical with piston is designed to special-shaped cylindrical, and promptly the cross section perpendicular to piston axis is oval or revises ellipse that ovality changes along axis direction according to certain rules.
Because piston skirt thrust face and cylinder wall only have β=80 °～100 ° of circular arcs can contact, so under the effect of side force, the trend with the skirt section flattening of justifying is arranged, force the axial skirt section of key seat to be extended simultaneously; Receive the effect of gaseous-pressure on the piston top, top land is bent in the key seat span, and the trend that the piston skirt is had expand outwardly; Piston boss place material is piled up, and makes on the key seat direction in skirt section and produces the thermal deformation greater than its vertical direction.Therefore, stuck or cause local accelerated wear test in cylinder for preventing piston, must when design, make the metal of key seat direction prune some, the minor axis of piston boss axis as ellipse more.
Outside piston eccentric processing method mainly is the processing method of eccentric turning in the prior art.But this kind method needs the special eccentric frock of making, and the manufacturing frock is complicated, the process-cycle is long, the very flexible of eccentric processing.The clamping frock makes the processed workpiece poor dimensional stability repeatedly.The kind of machining piston is narrow, and it is slow that produce market occupies speed.
Summary of the invention:
Problem to be solved by this invention is: overcome the deficiency of prior art, a kind of processing method of can be on the Digit Control Machine Tool that the gyroaxis function is arranged outside piston being carried out eccentric milling is provided.
Technical scheme of the present invention is: on the Digit Control Machine Tool that the gyroaxis function is arranged, with the tension of piston location.
According to working (machining) efficiency, the roughness of finished surface, the material of rapidoprint is selected milling cutter.Make up the Mathematical Modeling of milling cutter running orbit then, wherein R represents the blank radius of machining piston, and ε represents eccentric throw, and ρ represents the distance of the actual processing stand of milling cutter to the center of circle, and θ represents the angle between ε and the ρ.On Digit Control Machine Tool, work out macroprogram.Then import the parameters raw value.Next the run macro program is processed piston.The final program operation finishes process finishing.
The foundation of macroprogram may further comprise the steps:
Step SS1: program begins;
Step SS2: the actual processing stand of calculating milling cutter running orbit is the position coordinates of processing stand to the distance in the center of circle;
Step SS3: whether the angle of judging piston rotation is greater than the absolute value of the ψ value of original input.
Step SS4: milling cutter is feed on Z-direction;
Step SS5: judge the feed position of milling cutter on Z-direction.
Step SS6: EP (end of program).
The present invention can carry out the eccentric chamfered edge processing of multiclass outside piston through the secondary development that utilizes the lathe programing function; Easy to operate; Solve present piston eccentric processing turning and made frock, long defective of cycle, realized the flexibility of eccentric processing, can be so that the kind of machining piston increases greatly; Batch machining can be carried out in the enterprise scene, and product quality guarantees easily; And the eccentric milling method of outside piston of the present invention is simple, and is reliable, for the application that realizes piston eccentric processing technology provides new method again, significantly improved the flexibility of locomotive engine outside piston eccentric processing.Possesses higher utility.
Description of drawings:
Fig. 1 is the flow chart of outside piston eccentric processing method of the present invention.
Fig. 2 is for using the flow chart of macroprogram in the Digit Control Machine Tool in the outside piston eccentric processing method of the present invention.
Fig. 3 is the front view of the definition of each parameter in the outside piston eccentric processing method of the present invention.
Fig. 4 is the left view of Fig. 3.
The specific embodiment:
Do further description below in conjunction with the accompanying drawing specific embodiments of the invention.
Fig. 1 is the flow chart of outside piston eccentric processing method of the present invention.
At first on the Digit Control Machine Tool that the gyroaxis function is arranged, with the tension of piston location.Secondly according to working (machining) efficiency, the roughness of finished surface, the material of rapidoprint is selected milling cutter.Make up the Mathematical Modeling of milling cutter running orbit then, wherein R represents the blank radius of machining piston, and ε represents eccentric throw, and ρ represents the distance of the actual processing stand of milling cutter to the center of circle, and θ represents the angle between ε and the ρ, and on Digit Control Machine Tool, works out macroprogram.Input parameters raw value.The run macro program is processed piston then.Program running finishes, process finishing.
Fig. 2 is for using the flow chart of macroprogram in the Digit Control Machine Tool in the outside piston eccentric processing method of the present invention.The foundation of macroprogram may further comprise the steps:
Step SS1: program begins;
Step SS2: the actual processing stand of calculating milling cutter running orbit is the position coordinates of processing stand to the distance in the center of circle;
Step SS3: whether the angle of judging piston rotation is greater than the absolute value of the ψ value of original input.
Step SS4: milling cutter is feed on Z-direction;
Step SS5: judge the feed position of milling cutter on Z-direction.
Step SS6: EP (end of program).
Fig. 3 and Fig. 4 are the front view and the left view of the definition of each parameter in the outside piston eccentric processing method of the present invention.
What should explain at last is: though abovely described the specific embodiment of the present invention; But those skilled in the art are to be understood that; These only illustrate; Can make numerous variations or modification to these specific embodiment, and not deviate from principle of the present invention and essence, protection scope of the present invention is defined by the claims.
Claims (4)
1. an outside piston eccentric processing method is characterized in that, may further comprise the steps:
Step S1: on the Digit Control Machine Tool that the gyroaxis function is arranged, with the tension of piston location;
Step S2: according to working (machining) efficiency, the roughness of finished surface, rapidoprint is selected milling cutter;
Step S3: make up the Mathematical Modeling of milling cutter running orbit, on Digit Control Machine Tool, work out macroprogram;
Step S4: input parameters raw value;
Step S5: the run macro program, piston is processed;
Step S6: the macroprogram operation finishes process finishing.
2. a kind of outside piston eccentric processing method according to claim 1; It is characterized in that: among the described step S3; The Mathematical Modeling of the running orbit of milling cutter does, wherein R represents the blank radius of machining piston, and ε represents eccentric throw; ρ represents the distance of the actual processing stand of milling cutter to the center of circle, and θ represents the angle between ε and the ρ.
3. a kind of outside piston eccentric processing method according to claim 1 is characterized in that: among the described step S4, the raw value of input parameters comprises.
4. a kind of outside piston eccentric processing method according to claim 1, it is characterized in that: among the described step S5, macroprogram may further comprise the steps:
Step SS1: program begins;
Step SS2: the actual processing stand of calculating milling cutter running orbit is the position coordinates of processing stand to the distance in the center of circle;
Step SS3: the angle of judging the piston rotation.
Step SS4: milling cutter is feed on Z-direction;
Step SS5: judge the feed position of milling cutter on Z-direction.
Step SS6: EP (end of program).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105022668A CN102430784A (en) | 2010-09-29 | 2010-09-29 | Eccentric machining method for excircle of piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105022668A CN102430784A (en) | 2010-09-29 | 2010-09-29 | Eccentric machining method for excircle of piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102430784A true CN102430784A (en) | 2012-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105022668A Pending CN102430784A (en) | 2010-09-29 | 2010-09-29 | Eccentric machining method for excircle of piston |
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| CN (1) | CN102430784A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103092130A (en) * | 2013-02-01 | 2013-05-08 | 湖南江滨机器（集团）有限责任公司 | Piston outer circle modeling method |
| CN109459977A (en) * | 2018-12-26 | 2019-03-12 | 歌尔股份有限公司 | Numerical control lathe machining prgraming method for non-concentric structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5761409A (en) * | 1980-09-22 | 1982-04-13 | Nippon Piston Ring Co Ltd | Piston ring detacher |
| CN101659008A (en) * | 2009-09-01 | 2010-03-03 | 龙口市大川活塞有限公司 | Numerical control full automatic piston processing center |
| CN101693299A (en) * | 2009-09-30 | 2010-04-14 | 福州钜全汽车配件有限公司 | Numerical control four-axis piston external-diameter finishing lathe |
-
2010
- 2010-09-29 CN CN2010105022668A patent/CN102430784A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5761409A (en) * | 1980-09-22 | 1982-04-13 | Nippon Piston Ring Co Ltd | Piston ring detacher |
| CN101659008A (en) * | 2009-09-01 | 2010-03-03 | 龙口市大川活塞有限公司 | Numerical control full automatic piston processing center |
| CN101693299A (en) * | 2009-09-30 | 2010-04-14 | 福州钜全汽车配件有限公司 | Numerical control four-axis piston external-diameter finishing lathe |
Non-Patent Citations (2)
| Title |
|---|
| 丛新春: "数控加工技术在活塞制造中的应用", 《铁道车辆》 * |
| 王大庆等: "中凸变椭圆活塞加工数控车床数控系统的研究", 《组合机床与自动化加工技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103092130A (en) * | 2013-02-01 | 2013-05-08 | 湖南江滨机器（集团）有限责任公司 | Piston outer circle modeling method |
| CN109459977A (en) * | 2018-12-26 | 2019-03-12 | 歌尔股份有限公司 | Numerical control lathe machining prgraming method for non-concentric structure |
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Application publication date: 20120502 |