CN116765768A - Camshaft processing technology with good supporting performance - Google Patents
Camshaft processing technology with good supporting performance Download PDFInfo
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- CN116765768A CN116765768A CN202310882344.9A CN202310882344A CN116765768A CN 116765768 A CN116765768 A CN 116765768A CN 202310882344 A CN202310882344 A CN 202310882344A CN 116765768 A CN116765768 A CN 116765768A
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- cam
- shaft
- grinding
- grinding wheel
- workpiece
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- 238000012545 processing Methods 0.000 title claims abstract description 24
- 230000008093 supporting effect Effects 0.000 title claims abstract description 11
- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 238000000227 grinding Methods 0.000 claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000003801 milling Methods 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000007514 turning Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 13
- 238000003754 machining Methods 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 230000002706 hydrostatic effect Effects 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000005279 austempering Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Abstract
The invention discloses a camshaft processing technology with good support, which comprises the following steps: providing a shaft blank, wherein the length of the shaft blank is 200mm, the diameter of the shaft blank is 60mm, and the material is 42CrMo; feeding the shaft blank into a combined machine tool provided with a numerical control system, milling an end surface, drilling a center hole, positioning through the center hole, roughly turning a shaft neck and roughly milling a cam to obtain a workpiece; automatic measurement and automatic straightening are carried out on the workpiece by using an automatic straightener; providing a CBN grinding wheel grinding cam, and accurately grinding the shaft neck and the cam at the linear speed of the grinding wheel of 125m/s and keeping the speed constant, wherein a Marpos noise detection device is adopted for monitoring during grinding; and (5) surface-treating the workpiece to obtain a finished product. The cam shaft is roughly machined into the shape, then straightened, the cam is ground through the CBN grinding wheel to finish the shaft diameter and the cam, and Marpos noise detection is adopted to monitor in real time, so that the quality of a product is ensured, the cam shaft with good supporting stability is obtained, and the quality of the product and the processing efficiency are improved.
Description
Technical Field
The invention belongs to the technical field of camshafts, and particularly relates to a camshaft processing technology with good supporting property.
Background
The camshaft is a component in a piston engine. Its function is to control the opening and closing actions of the valve. Although the rotational speed of the camshaft is half that of the crankshaft in a four-stroke engine (the rotational speed of the camshaft is the same as that of the crankshaft in a two-stroke engine), the rotational speed is still high and a large torque is required to be born, so that the requirements on strength and support of the camshaft in design are high, and the camshaft is made of high-quality alloy steel or alloy steel generally. Since the law of valve motion is related to the power and operating characteristics of an engine, camshaft design plays a very important role in the design process of the engine.
The prior art is mainly complicated and complex aiming at the processing technology of the cam shaft, and adopts the traditional machining cam shaft, the product quality is not improved, the processing quality and the processing efficiency are still not high, the universality is poor, the use cost is high, the production and processing requirements cannot be met, and particularly, the support stability of the cam shaft cannot reach the aim of high durability in the cam grinding process through inspection measurement.
Disclosure of Invention
In view of the above, the technical problem to be solved by the invention is to provide a cam shaft processing technology with good supporting property, which is used for avoiding the trouble of low grinding quality and poor supporting stability of the cam shaft processing cam in the past.
In order to solve the technical problems, the invention discloses a camshaft processing technology with good supporting performance, which comprises the following steps:
providing a shaft blank, wherein the length of the shaft blank is 200mm, the diameter of the shaft blank is 60mm, and the material is 42CrMo;
b, feeding the shaft blank into a combined machine tool provided with a numerical control system, milling end surfaces, drilling center holes, positioning through the center holes, roughly turning journals and roughly milling cams to obtain workpieces;
step c, automatically measuring and automatically straightening the workpiece by using an automatic straightening machine;
step d, providing a CBN grinding wheel grinding cam, and accurately grinding the shaft neck and the cam at the linear speed of the grinding wheel of 125m/s and keeping the speed constant, wherein a Marpos noise detection device is adopted for monitoring during grinding;
and e, surface treating the workpiece to obtain a finished product.
According to an embodiment of the present invention, in the step b, a self-centering chuck and a tracking self-centering center frame are used to drill the center hole.
According to an embodiment of the present invention, the work piece is austempered before the step c.
According to an embodiment of the present invention, when the diameter of the CBN grinding wheel is changed in the step d, the numerical control system automatically performs a correction grinding process; and feeding back the lift errors detected by the ADCOLE measuring machine after processing to a lift meter for compensation.
According to an embodiment of the present invention, the CBN grinding wheel is supported by a hydrostatic guideway and is driven by a linear motor.
According to an embodiment of the present invention, the surface treatment in the step e includes polishing, flaw detection and cleaning.
Compared with the prior art, the invention can obtain the following technical effects:
the cam shaft is roughly machined, the shape of the cam shaft is roughly machined, then straightening is carried out, the cam shaft diameter and the cam are finely ground through a CBN grinding wheel, marpos noise detection is adopted for real-time monitoring, the quality of products is guaranteed, the cam shaft with good supporting stability is obtained, and the quality of products and the processing efficiency are improved.
Of course, it is not necessary for any one product embodying the invention to achieve all of the technical effects described above at the same time.
Detailed Description
The following will describe embodiments of the present invention in detail by referring to examples, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented.
A camshaft processing technology with good supporting performance comprises the following steps:
providing a shaft blank, wherein the length of the shaft blank is 200mm, the diameter of the shaft blank is 60mm, and the material is 42CrMo;
b, feeding the shaft blank into a combined machine tool provided with a numerical control system, milling end surfaces, drilling center holes, positioning through the center holes, roughly turning journals and roughly milling cams to obtain workpieces;
step c, automatically measuring and automatically straightening the workpiece by using an automatic straightening machine;
step d, providing a CBN grinding wheel grinding cam, and accurately grinding the shaft neck and the cam at the linear speed of the grinding wheel of 125m/s and keeping the speed constant, wherein a Marpos noise detection device is adopted for monitoring during grinding;
and e, surface treating the workpiece to obtain a finished product.
In one embodiment of the invention, the shaft stock is selected from bars of material 42CrMo, which is 200mm long and 60mm in diameter, and is fed into a machine tool equipped with a numerical control system for rough machining, and the journal and cam portions are formed to obtain a semi-finished cam workpiece.
The automatic straightening machine automatically measures the workpiece, automatically straightens the workpiece, avoids vibration caused by low rigidity in the machining process, not only influences the dimensional accuracy, shape accuracy and surface quality of the machined part, but also influences the cutting allowance and the improvement of the productivity of the subsequent process, and can prevent the subsequent process from being machined even causing the midway rejection of the workpiece when the deformation is serious.
After straightening, the workpiece is continuously fed into a numerical control machine tool, and a CBN grinding wheel is used for grinding the cam, wherein CBN is an artificially synthesized superhard material with hardness inferior to that of diamond. Because the CBN molecular structure is very stable, the CBN has the advantages of high hardness, good thermal stability, strong chemical inertness, high compressive strength and the like. By utilizing the excellent properties of the CBN material, the CBN grinding wheel is manufactured by using the CBN material as a grinding material and is combined with a high-speed and high-rigidity grinding machine and an advanced grinding process, so that the production efficiency and the processing quality of workpieces are greatly improved.
In addition, the linear speed of the grinding wheel is 125m/s, and the shaft neck and the cam are accurately polished at a constant speed, so that when the diameter of the grinding wheel is reduced, the rotating speed of the grinding wheel is increased, the linear speed is kept unchanged, the quality of a cam molded product is greatly improved, and the support stability is better. The Marpos noise detection device monitors, and the trimming precision of the CBN grinding wheel is improved. And finally, carrying out surface treatment to obtain a finished camshaft product.
In the step b, a self-centering chuck and a tracking self-centering center frame are adopted to drill a center hole, so that the standard is maintained, and the machining accuracy is ensured.
In addition, the work piece is austempered before the step c, and heat treatment is carried out, so that the deformation of the product caused by stress concentration is reduced.
In the step d, when the diameter of the CBN grinding wheel is changed, the numerical control system automatically carries out a correction grinding process; and feeding back the lift errors detected by the ADCOLE measuring machine after processing to a lift meter for compensation. And the dressing precision of the CBN grinding wheel is improved.
Further, the CBN grinding wheel is supported by adopting a hydrostatic guideway and driven by a linear motor, so that the machining efficiency is improved.
Preferably, the surface treatment in step e comprises polishing, flaw detection and cleaning.
In summary, the cam shaft is roughly machined, then straightened, the cam is ground through the CBN grinding wheel to finish the shaft diameter and the cam, and Marpos noise detection is adopted to monitor in real time, so that the product quality is ensured, the cam shaft with good supporting stability is obtained, and the product quality and the processing efficiency are improved.
While the foregoing description illustrates and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (6)
1. The camshaft processing technology with good supporting performance is characterized by comprising the following steps:
providing a shaft blank, wherein the length of the shaft blank is 200mm, the diameter of the shaft blank is 60mm, and the material is 42CrMo;
b, feeding the shaft blank into a combined machine tool provided with a numerical control system, milling end surfaces, drilling center holes, positioning through the center holes, roughly turning journals and roughly milling cams to obtain workpieces;
step c, automatically measuring and automatically straightening the workpiece by using an automatic straightening machine;
step d, providing a CBN grinding wheel grinding cam, and accurately grinding the shaft neck and the cam at the linear speed of the grinding wheel of 125m/s and keeping the speed constant, wherein a Marpos noise detection device is adopted for monitoring during grinding;
and e, surface treating the workpiece to obtain a finished product.
2. The process for machining a well supported camshaft according to claim 1, wherein in step b, a self-centering chuck and a tracking self-centering jig are used to drill the center hole.
3. The well-supported camshaft processing process of claim 1, wherein step c is preceded by austempering the workpiece.
4. The well-supported camshaft processing process according to claim 1, wherein in the step d, when the diameter of the CBN grinding wheel is changed, the numerical control system automatically performs a correction grinding process; and feeding back the lift errors detected by the ADCOLE measuring machine after processing to a lift meter for compensation.
5. The well-supported camshaft processing process of claim 1, wherein the CBN grinding wheel is supported by hydrostatic guideway and driven by linear motor.
6. The well-supported camshaft processing process of claim 1, wherein the step e surface treatment includes polishing, flaw detection, and cleaning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310882344.9A CN116765768A (en) | 2023-07-19 | 2023-07-19 | Camshaft processing technology with good supporting performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310882344.9A CN116765768A (en) | 2023-07-19 | 2023-07-19 | Camshaft processing technology with good supporting performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116765768A true CN116765768A (en) | 2023-09-19 |
Family
ID=88008164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310882344.9A Withdrawn CN116765768A (en) | 2023-07-19 | 2023-07-19 | Camshaft processing technology with good supporting performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116765768A (en) |
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2023
- 2023-07-19 CN CN202310882344.9A patent/CN116765768A/en not_active Withdrawn
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20230919 |
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| WW01 | Invention patent application withdrawn after publication |