CN103921060B - The method for fine finishing of camshaft - Google Patents
The method for fine finishing of camshaft Download PDFInfo
- Publication number
- CN103921060B CN103921060B CN201410190235.1A CN201410190235A CN103921060B CN 103921060 B CN103921060 B CN 103921060B CN 201410190235 A CN201410190235 A CN 201410190235A CN 103921060 B CN103921060 B CN 103921060B
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- China
- Prior art keywords
- axle journal
- fine grinding
- cam
- camshaft
- finishing
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Classifications
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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
- B23P9/00—Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings; Features of such surfaces not otherwise provided for, their treatment being unspecified
- B23P9/02—Treating or finishing by applying pressure, e.g. knurling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention discloses the method for fine finishing of a kind of camshaft, in turn include the following steps: the first step, workpiece is carried out finishing; Second step, fine grinding axle journal and fine grinding cam, the wherein reserved axle journal surplus of fine grinding axle journal operation; 3rd step, the axle journal of the distalmost end of the workpiece completed by second step carries out cam alignment as the strong point; And the 4th step, fine grinding axle journal. The method can guarantee that the cam base circle of camshaft is beated and meets the requirements, and the machining accuracy of camshaft is high.
Description
Technical field
The present invention relates to field of machining, particularly to the method for fine finishing of a kind of camshaft.
Background technology
Camshaft is one of key components and parts of electromotor, and the quality of its processing directly affects the power performance of electromotor. Wherein, a key index on camshaft is that cam base circle is beated, namely the radial run-out of cam base circle, the size that cam base circle is beated will affect valve stationarity when closed, and then the formation quality of impact mixing gas, cause incomplete combustion, make the power drop of electromotor, so, in the course of processing, its numerical value must be carried out monitor closely. Usually, with the common axis of the two supports axle journal of camshaft for benchmark, the radial run-out tolerance of cam base circle is 0.05mm.
At present, the final size of the cam base circle of camshaft is typically all on numerical control CBN cam grainder grinding out. Owing to processing on numerical control CBN cam grainder, the axle journal of centre frame bearer cams axle, and also the benchmark beated of cam base circle is the distalmost end axle journal of camshaft, so axle journal there being certain required precision, after fine grinding cam operation must be arranged in fine grinding axle journal. Therefore, the accurately machined technological process of camshaft is generally: fine grinding axle journal-fine grinding cam-polishing.
In above-mentioned technique, cam the surplus of preceding working procedure, centre bore error, the top driving hydraulic cylinder of equipment the factor such as pressure and centre frame rigidity all can beat to basic circle and impact. If lathe and workpiece can not keep a perfect condition, basic circle is beated easily overproof.
It is disclosed in the information of this background section and is merely intended to increase the understanding of the general background to the present invention, and be not construed as admitting or imply in any form that this information structure is for prior art that persons skilled in the art are known.
Summary of the invention
It is an object of the invention to provide the method for fine finishing of a kind of camshaft, by the technological process of reasonable arrangement camshaft machining, Optimizing Process Parameters, reach to control the purpose that cam base circle is beated, camshaft precision is high.
For achieving the above object, the invention provides the method for fine finishing of a kind of camshaft, in turn include the following steps: the first step, workpiece is carried out finishing; Second step, fine grinding axle journal and fine grinding cam, the wherein reserved axle journal surplus of fine grinding axle journal operation; 3rd step, the axle journal of the distalmost end of the workpiece completed by second step carries out cam alignment as the strong point; And the 4th step, fine grinding axle journal.
Preferably, also include the 5th step, workpiece is processed by shot blasting.
Compared with prior art, there is advantages that and increased finishing operation before fine grinding axle journal, alignment cam and fine grinding axle journal operation is added between fine grinding axle journal, fine grinding cam and polishing, and the surplus of reasonable arrangement fine grinding axle journal operation, can guarantee that basic circle is beated in the scope of product drawing requirement.
Accompanying drawing explanation
Fig. 1 is the process chart of the method for fine finishing of a kind of camshaft according to the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, it is to be understood that protection scope of the present invention is not by the restriction of detailed description of the invention.
Explicitly indicate that unless otherwise other, otherwise in entire disclosure and claims, term " includes " or its conversion will be understood to comprise the element or ingredient stated at such as " comprising " or " including " etc., and does not get rid of other element or other ingredient.
As it is shown in figure 1, the method for fine finishing of the camshaft according to the specific embodiment of the invention, in turn include the following steps:
Step 101, carries out finishing to workpiece;
Step 102 and step 103, be taken up in order of priority and carry out fine grinding axle journal and fine grinding cam, wherein the reserved axle journal surplus of fine grinding axle journal operation;
Step 104, the axle journal of the distalmost end of workpiece step 103 completed carries out cam alignment as the strong point; And
Step 105, fine grinding axle journal.
Finally can also increase step 106, workpiece is processed by shot blasting.
The offer one that is primarily intended to of the method for fine finishing of the camshaft of the present embodiment ensures that cam base circle is beated satisfactory camshaft, and the method passes through reasonable arrangement technological process, Optimizing Process Parameters, reaches to control the purpose that cam base circle is beated. Because, the final size of the cam base circle of camshaft is typically all on numerical control CBN cam grainder grinding out, the benchmark that cam base circle is beated is the distalmost end axle journal of camshaft, so axle journal there being certain required precision, so, in the present embodiment, before fine grinding axle journal, increase finishing operation, between fine grinding axle journal, fine grinding cam and polishing, add alignment cam and fine grinding axle journal operation.
Why the present embodiment is arranged technological process, and its analysis on its rationality is as follows:
1. finishing operation release stress within camshaft. Finishing is a kind of method that surface to parts is processed, processes, it is intended to improve the comprehensive quality of component surface (nearly surface). Moving back and forth of complexity is done at surface of the work by abrasive material, the micro cutting process that surface of the work is rolled by fine-grained abrasive material and swiping is delineated, not only surface of the work can be carried out deburring and seamed edge rounding, inside workpiece stress can also be eliminated, improve roughness grade number, surface of the work physical and mechanical properties can be improved, improve surface of the work comprehensive quality. In finishing process, surface of the work is without damaging, scratching, and without obvious stricture of vagina mark, bright and clean uniformly workpiece will not be deformed, and does not change original dimensional accuracy grade.
2. workpiece is after finishing operation, fine grinding axle journal and fine grinding cam operation must be carried out, wherein the reserved axle journal surplus of fine grinding axle journal operation, in order to carry out follow-up fine grinding axle journal operation, cam alignment is carried out, it is ensured that the benchmark of cam alignment is accurate when ensureing the precision of cam journal. After fine grinding cam operation, cam base circle will necessarily be beated and be exerted one's influence by various factors, so, cam alignment process must be increased, in alignment cam operation, V-block bearer cams axle distalmost end axle journal, ensure that with the axle journal of camshaft distalmost end for benchmark, the basic circle of cam is applied pressure by alignment head under the help of dial gauge, it is ensured that cam base circle is beated in the scope of product drawing requirement, and beating of eliminating that external condition causes is overproof.
3. fine grinding axle journal controls the precision of axle journal further well, such as the circularity of axle journal with beat, thus indirectly ensure that the basic circle of cam is beated. Last polishing process can be removed the vestige of preceding processes, improves machining accuracy further.
Summary, the present embodiment, by arranging rational process program, increased finishing operation before fine grinding axle journal, added alignment cam and fine grinding axle journal operation between fine grinding axle journal, fine grinding cam and polishing, and reasonable arrangement surplus, can guarantee that basic circle is beated in the scope of product drawing requirement.
The aforementioned description to the specific illustrative embodiment of the present invention illustrates that and the purpose of illustration. These describe and are not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned instruction, it is possible to carry out much changing and change. Purpose exemplary embodiment selected and describe is in that to explain the certain principles of the present invention and practical application thereof, so that those skilled in the art is capable of and utilizes the various different exemplary of the present invention and various different selection and change. The scope of the present invention is intended to be limited by claims and equivalents thereof.
Claims (2)
1. the method for fine finishing of a camshaft, it is characterised in that in turn include the following steps:
The first step, carries out finishing to workpiece;
Second step, fine grinding axle journal and fine grinding cam, the wherein reserved axle journal surplus of fine grinding axle journal operation;
3rd step, the axle journal of the distalmost end of the workpiece completed by second step carries out cam alignment as the strong point; And
4th step, fine grinding axle journal.
2. the method for fine finishing of camshaft according to claim 1, it is characterised in that also include the 5th step, workpiece is processed by shot blasting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410190235.1A CN103921060B (en) | 2014-05-07 | 2014-05-07 | The method for fine finishing of camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410190235.1A CN103921060B (en) | 2014-05-07 | 2014-05-07 | The method for fine finishing of camshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103921060A CN103921060A (en) | 2014-07-16 |
| CN103921060B true CN103921060B (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410190235.1A Active CN103921060B (en) | 2014-05-07 | 2014-05-07 | The method for fine finishing of camshaft |
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| CN (1) | CN103921060B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105710609A (en) * | 2016-03-14 | 2016-06-29 | 湖南汉星机械制造有限公司 | Machining process for camshaft of small gasoline engine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1616188A (en) * | 2003-11-13 | 2005-05-18 | 扬动股份有限公司 | Diesel engine camshaft machining process |
| JP4915384B2 (en) * | 2008-04-10 | 2012-04-11 | トヨタ自動車株式会社 | Method for manufacturing hollow gear |
| CN101456041A (en) * | 2008-12-30 | 2009-06-17 | 上虞市内燃机配件有限公司 | Camshaft straightening machine |
| CN102189376B (en) * | 2011-03-22 | 2013-03-06 | 南车戚墅堰机车有限公司 | Novel cam shaft machining process |
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2014
- 2014-05-07 CN CN201410190235.1A patent/CN103921060B/en active Active
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| CN103921060A (en) | 2014-07-16 |
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