Study On Machining Technology Optimization Of Angle Between Keyway And Tooth Of Camshaft Gear

With the rapid development of China’s automobile industry and the generalconsumers to the further understanding of auto industry put forward a lot of newrequirements. New requirements involved to the car’s safety, comfort, playability,economy and appearance etc. Only by continuously adapt to everyone to the car’s newrequest, can we make our own products always get recognized by the market.As the car engine heart, become the focus on all of the auto parts. The enginepower, environmental protection, economy, stability and low noise has become theengine design and manufacturing process we must pay attention to the performance.Especially the macroscopic sustained economic growth, drive the large displacement,great horsepower heavy trucks and engineering machinery demand continued to rise,make the car engine power sustained growth, the structure is more complicated.Engine gear as the engine power transmission and control parts, with the use oflatest technology for the engine, parts structure is also becoming more and morecomplicated, especially the engine camshaft gear. The camshaft is used according toengine each cylinder work order and distribution phase, through the CAM accurateopening and closing the exhaust port, to ensure that the engine a continuous cyclework. At present most of the engine’s working principle all use this control forms,based on this control form, on the exhaust gate opening and closing the accuracy andpunctuality put forward high request. The rotation of the camshaft is through theoutside camshaft gears and crank gear meshing will transfer to the rotation of thecrank shaft camshaft, thus promote the rotation of the camshaft. Due to the crankshaftgear and camshaft gears transmission ratio is usually fixed2:1, such crankshaft andcamshaft is at a relatively fixed speed than the next operation, in line with the enginerunning process two root the relative motion of the relationship. In addition thecamshaft and drive pump, gasoline pump and distributor.CAM shaft gear through the hole and camshaft of interference fit recombinationkey connection to transfer to the CAM shaft power, this kind of connection way forgear slotting relative to the inner hole and alveolar position degrees put forward highrequest, only the camshaft and crankshaft gear meshing Angle meet the requirementsto ensure engine right distribution and ignition time, otherwise, it will influence theperformance of the engine even damaging the engine. In the electronic control engine,CAM shaft gear painting board in the same circle have a position relative fixed sinkhole or tank (sink hole or the number of tank normally and valve in equal Numbers,each sink hole corresponding to a valve), the engine electronic control device throughthe sink hole or slot rotation to fixed signal list to make sure it corresponding valveopen and closed, and then transmit signals to control chip to control the engineoperation. Thus camshaft gear structure must be designed to outside diameter size,thickness of small size, inner hole of small, thin plate, increased the difficulty ofprocessing technology. This article through to the engine camshaft gear structure to carry on the analysis,study the gear slotting relative to the inner hole and alveolar position degreerequirements of one of the important characteristics that the keyway center line andthe center line of the tooth Angle, referred to as the key tooth Angle, grasps theprocessing process key tooth Angle influence factors, at the same time in variousprocesses of this size characteristics for statistical data, using data analysis softwareMINITAB to carry on the analysis, the change rule of master data, this papersummarizes control the size characteristics of the process methods and control the sizecharacteristics of the key process and optimize the process technology methods,improve the stability of the process, into the production of manufacturing process,achieved good effect.In a word, this paper research work for the company timing gear parts processingtechnology to provide strong support, at the same time for the future analysis to solvethis problem is put forward with the guidance method.