CN112496688A - Camshaft machining method without positioning hole reference - Google Patents
Camshaft machining method without positioning hole reference Download PDFInfo
- Publication number
- CN112496688A CN112496688A CN202011426573.2A CN202011426573A CN112496688A CN 112496688 A CN112496688 A CN 112496688A CN 202011426573 A CN202011426573 A CN 202011426573A CN 112496688 A CN112496688 A CN 112496688A
- Authority
- CN
- China
- Prior art keywords
- camshaft
- cam
- hole
- positioning hole
- holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
Abstract
The invention relates to the field of camshaft machining methods, in particular to a camshaft machining method without a positioning hole datum. The camshaft machining method comprises the following steps: A. firstly, drilling a central hole on the end face of a blank; B. then roughly turning the blank into the outline shape of the camshaft; C. then milling the outline of the cam; D. then carrying out integral carburization on the camshaft; E. turning a carburized layer of the camshaft body part; F. drilling a deep oil hole on the camshaft; G. drilling an oil hole on a journal of the camshaft; H. integrally quenching the camshaft; I. roughly grinding a journal of a camshaft; J. finely turning two end faces of the camshaft; K. processing bolt mounting holes and positioning holes on two end faces of the cam shaft by taking the cam as a reference; the invention optimizes the process flow, reduces the processing procedures and improves the processing efficiency. The cam profile hardening layer depth is uniform, and the service life of the cam shaft is prolonged.
Description
Technical Field
The invention relates to the field of camshaft machining methods, in particular to a camshaft machining method without a positioning hole datum.
Background
In the machining process of the carburizing type camshaft, positioning holes are needed to be machined on two end faces of the camshaft from the rough machining of the molded surface of the camshaft. At present, the positioning hole is processed when a cam profile is roughly processed, and then in order to prevent the influence of carburizing and quenching on the positioning hole, a rivet welding copper nail process is adopted. And in order to prevent air in the positioning hole from being discharged completely, a small exhaust hole is drilled on the outer circle of the camshaft neck, so that the positioning hole is prevented from being cracked. Because the heat treatment may cause the camshaft to deform, the positioning hole is re-processed by taking the positioning hole processed in the front as a reference, and the cam is ground by the positioning hole, so that the grinding allowance difference of the cam profile is large, and the hardening depth of the cam profile is not uniform. The locating holes need protection when carburizing. If the positioning hole is welded, the local hardness of the crater is high, when the end face of the camshaft is turned, the turning tool is turned intermittently, the turning tool is easy to break, and the service life of the turning tool is short.
Disclosure of Invention
The invention provides a camshaft machining method without a positioning hole reference, aiming at overcoming the defect that positioning holes need to be machined on two end faces of the existing camshaft.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for processing a camshaft without a positioning hole reference comprises the following steps:
A. firstly, drilling a central hole on the end face of a blank;
B. then roughly turning the blank into the outline shape of the camshaft;
C. then milling the outline of the cam;
D. then carrying out integral carburization on the camshaft;
E. turning a carburized layer of the camshaft body part;
F. drilling a deep oil hole on the camshaft;
G. drilling an oil hole on a journal of the camshaft;
H. integrally quenching the camshaft;
I. roughly grinding a journal of a camshaft;
J. finely turning two end faces of the camshaft;
K. processing bolt mounting holes and positioning holes on two end faces of the cam shaft by taking the cam as a reference;
l, grinding and processing each cam profile of the camshaft according to the positioning holes processed on the cam;
m, accurately grinding the shaft neck of the camshaft;
and N, detecting the finished camshaft.
According to another embodiment of the invention, the method further comprises a step G of firstly measuring the position of a certain cam on the camshaft under the coordinate system of the machine tool, then calculating the position of each journal oil hole according to the angle of the certain cam and machining each oil hole on the journal.
According to another embodiment of the invention, the method further comprises a step K of measuring the positions of the cams on the camshaft in a machine tool coordinate system, calculating the theoretical positions of the positioning holes corresponding to the cams according to the angles of the cams, adding the theoretical positions of the positioning holes on all the cams, dividing the sum by the number of the cams to obtain the ideal theoretical position coordinates of the positioning holes with consistent grinding allowance of the cams, and drilling and roughly boring the positioning holes according to the ideal theoretical position coordinates. And measuring the position degree of the positioning hole after rough boring by taking a flange or a shaft neck where the positioning hole is positioned as a reference, compensating the circle center coordinate of the positioning hole according to the difference value of the measured value and the theoretical value, and finely boring the positioning hole and each bolt mounting hole by taking the compensated circle center coordinate of the positioning hole as a workpiece coordinate system.
The invention has the advantages of optimizing the process flow, reducing the processing procedures and improving the processing efficiency. The cam profile hardening layer depth is uniform, and the service life of the cam shaft is prolonged.
Detailed Description
A camshaft machining method without a positioning hole reference comprises the following steps:
A. firstly, drilling a central hole on the end face of a blank;
B. then roughly turning the blank into the outline shape of the camshaft;
C. then milling the outline of the cam;
D. then carrying out integral carburization on the camshaft;
E. turning a carburized layer of the camshaft body part;
F. drilling a deep oil hole on the camshaft;
G. drilling an oil hole on a journal of the camshaft;
H. integrally quenching the camshaft;
I. roughly grinding a journal of a camshaft;
J. finely turning two end faces of the camshaft;
K. processing bolt mounting holes and positioning holes on two end faces of the cam shaft by taking the cam as a reference;
l, grinding and processing each cam profile of the camshaft according to the positioning holes processed on the cam;
m, accurately grinding the shaft neck of the camshaft;
and N, detecting the finished camshaft.
And G, firstly measuring the position of a certain cam on the camshaft under a machine tool coordinate system, then calculating the position of each journal oil hole according to the angle of the cam, and processing each oil hole on the journal.
And step K, firstly measuring the positions of the cams on the cam shaft under a machine tool coordinate system, then calculating the theoretical positions of the positioning holes corresponding to the cams according to the angles of the cams, finally adding the theoretical positions of the positioning holes on all the cams, dividing the sum by the number of the cams to obtain the ideal theoretical position coordinates of the positioning holes with consistent grinding allowance of the cams, and drilling and roughly boring the positioning holes according to the coordinates. And measuring the position degree of the positioning hole after rough boring by taking a flange or a shaft neck where the positioning hole is positioned as a reference, compensating the circle center coordinate of the positioning hole according to the difference value of the measured value and the theoretical value, and finely boring the positioning hole and each bolt mounting hole by taking the compensated circle center coordinate of the positioning hole as a workpiece coordinate system.
Claims (3)
1. A method for processing a camshaft without a positioning hole reference is characterized by comprising the following steps:
A. firstly, drilling a central hole on the end face of a blank;
B. then roughly turning the blank into the outline shape of the camshaft;
C. then milling the outline of the cam;
D. then carrying out integral carburization on the camshaft;
E. turning a carburized layer of the camshaft body part;
F. drilling a deep oil hole on the camshaft;
G. drilling an oil hole on a journal of the camshaft;
H. integrally quenching the camshaft;
I. roughly grinding a journal of a camshaft;
J. finely turning two end faces of the camshaft;
K. processing bolt mounting holes and positioning holes on two end faces of the cam shaft by taking the cam as a reference;
l, grinding and processing each cam profile of the camshaft according to the positioning holes processed on the cam;
m, accurately grinding the shaft neck of the camshaft;
and N, detecting the finished camshaft.
2. The method as claimed in claim 1, wherein in step G, the position of a cam on the camshaft in the machine coordinate system is measured, and then the oil holes of the journal are machined by calculating the positions of the oil holes of the journal according to the angle of the cam.
3. The method as claimed in claim 1, wherein in step K, the position of each cam on the camshaft in the machine coordinate system is measured, the theoretical position of the locating hole corresponding to each cam is calculated according to the angle of each cam, the theoretical positions of the locating holes on all the cams are added, the number of the cams is divided, the ideal theoretical position coordinates of the locating holes with the same grinding allowance of each cam are obtained, and the locating holes are drilled and roughly bored according to the ideal theoretical position coordinates. And measuring the position degree of the positioning hole after rough boring by taking a flange or a shaft neck where the positioning hole is positioned as a reference, compensating the circle center coordinate of the positioning hole according to the difference value of the measured value and the theoretical value, and finely boring the positioning hole and each bolt mounting hole by taking the compensated circle center coordinate of the positioning hole as a workpiece coordinate system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011426573.2A CN112496688B (en) | 2020-12-09 | 2020-12-09 | Camshaft processing method without positioning hole reference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011426573.2A CN112496688B (en) | 2020-12-09 | 2020-12-09 | Camshaft processing method without positioning hole reference |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112496688A true CN112496688A (en) | 2021-03-16 |
| CN112496688B CN112496688B (en) | 2023-09-29 |
Family
ID=74971663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011426573.2A Active CN112496688B (en) | 2020-12-09 | 2020-12-09 | Camshaft processing method without positioning hole reference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112496688B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113601119A (en) * | 2021-08-13 | 2021-11-05 | 陕西柴油机重工有限公司 | Machining method for high-power diesel engine camshaft |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6473964B1 (en) * | 2000-01-12 | 2002-11-05 | Keystone Investment Corporation | Method of fabricating camshafts |
| CN102091936A (en) * | 2011-01-24 | 2011-06-15 | 青岛淄柴博洋柴油机股份有限公司 | Method for processing crankshaft oil holes |
| CN102179729A (en) * | 2011-04-13 | 2011-09-14 | 南车戚墅堰机车有限公司 | Online camshaft measuring and machining process |
| CN102189376A (en) * | 2011-03-22 | 2011-09-21 | 南车戚墅堰机车有限公司 | Novel cam shaft machining process |
| CN202114585U (en) * | 2011-06-01 | 2012-01-18 | 安徽金光机械集团股份有限公司 | Special cam grinding fixture of cam shaft |
| CN104233315A (en) * | 2013-06-14 | 2014-12-24 | 无锡市森信精密机械厂 | Technology for preventing grinding crack of carburizing camshaft |
-
2020
- 2020-12-09 CN CN202011426573.2A patent/CN112496688B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6473964B1 (en) * | 2000-01-12 | 2002-11-05 | Keystone Investment Corporation | Method of fabricating camshafts |
| CN102091936A (en) * | 2011-01-24 | 2011-06-15 | 青岛淄柴博洋柴油机股份有限公司 | Method for processing crankshaft oil holes |
| CN102189376A (en) * | 2011-03-22 | 2011-09-21 | 南车戚墅堰机车有限公司 | Novel cam shaft machining process |
| CN102179729A (en) * | 2011-04-13 | 2011-09-14 | 南车戚墅堰机车有限公司 | Online camshaft measuring and machining process |
| CN202114585U (en) * | 2011-06-01 | 2012-01-18 | 安徽金光机械集团股份有限公司 | Special cam grinding fixture of cam shaft |
| CN104233315A (en) * | 2013-06-14 | 2014-12-24 | 无锡市森信精密机械厂 | Technology for preventing grinding crack of carburizing camshaft |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113601119A (en) * | 2021-08-13 | 2021-11-05 | 陕西柴油机重工有限公司 | Machining method for high-power diesel engine camshaft |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112496688B (en) | 2023-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102699642B (en) | Process for machining rail traffic driven gear | |
| CN102501035A (en) | Quenching and tempering method in tooth punching process of gear with medium-hard tooth surface | |
| CN110961876A (en) | Machining method of two half type gear rings | |
| US9180530B2 (en) | Rotary tool and method of producing | |
| CN104959629A (en) | Improvement method of shaft part machining technology | |
| CN106363377A (en) | Machining method of gear shafts | |
| CN101498335A (en) | Method for manufacturing diesel engine connecting bar | |
| CN104057266A (en) | Slewing bearing quenching type inner gear ring processing technology | |
| CN112496688B (en) | Camshaft processing method without positioning hole reference | |
| CN102699644A (en) | Processing method for internally toothed annulus | |
| CN107760844A (en) | Method and apparatus for manufacturing fuel distributor | |
| CN108127348A (en) | A kind of manufacturing process of the sealed cylinder head of engine | |
| CN105499935B (en) | A kind of processing technology that elongated deep hole complex parts are produced in enormous quantities | |
| CN108637617A (en) | A kind of method of processing inclined drill jig | |
| CN108747240A (en) | A kind of car Gearmaking Technology | |
| CN102213313A (en) | Processing technology for whole spherical iron piston | |
| CN103878545A (en) | Machining process of multi-side porous parts | |
| CN103506816A (en) | Processing technique of planet carrier of coal cutter | |
| CN113601119B (en) | Machining method for high-power diesel engine camshaft | |
| CN109128723B (en) | Method for machining V-shaped through lightening hole of crankshaft connecting rod neck | |
| CN103264262B (en) | Machining technology of cam reinforcement lever mechanism | |
| CN105081692B (en) | A kind of processing method of the gradual change type strength structure of piston of high power diesel engine pin oilhole | |
| CN112743442B (en) | Honing method for carburizing hole of tappet guide sleeve of aero-engine | |
| CN115213641B (en) | Method for machining transmission input shaft | |
| CN106425304B (en) | A kind of processing technology of lubricating oil nozzle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |