Graph cylinder of engine of a 1 derv covers finished product, tool of honing of a 2 class and air of a compositive type are on the side of its metric system. In this tool, the first is abrade device, use at half accurate treatment, its cycle time is controlled by air system. Next, abrade device exits these abrasive, by the 2nd abrade device executes finish machining mission, the peak value that with purify the first abrade device leaves. The quality of project section plane that produces from this but from the treatment that finish a few years see come inside the cylinder bushing after, the manufacturer of of all kinds engine people, be asked to reduce the pressure of harmful gas discharge capacity all the time. Come a few years accordingly, they also try hard for this all the time. It is the manufacturer of car and lorry not merely, and the engine manufacturer that still includes all sorts of car, arrive from the lawnmower of lawn for example the engine of engine car -- the fuel efficiency of all car had very big rise, its prevent the property that air contaminates, must satisfy increasingly rigid government standard. Today, its difference is rate issue not merely, and still include difficulty problem. Although, present engine efficiency is such tall, but their design personnel must work with greater efforts, with rising further efficiency is mixed increase benefit. Sunnen company is a business that pursues bore diameter honing technically machining system and tool production, mr Dennis Westhoff of this company and Mr Rich Moellenberg are two eyewitness that witness this technology development. With other treatment craft photograph is compared, perhaps honing treatment solves stricter engine to discharge performance issue to appear to seeking particularly important. "In 20 centuries 80 time, all easier problems were solved, " manager of global business development department Mr Westhoff of Sunnen company says. The respect is designed in the engine of car, had made direct the improvement that become, do not have the problem that regards principal attention as fuel efficiency or air quality formerly to undertake handling. Satisfying the history that discharges a standard is from these mechanical spare partses excelsior those who begin, pass more accurate treatment, include to raise cylinder diameter the precision that circularity and cylinder spend, in order to satisfy the tolerancepublic errand requirement of spare parts appearance and dimension. Now, engine manufacturer is seeking the means that improves further, expect the move is small even its progress level, discharge a requirement at present in order to satisfy. Specific for, today, want to win engine to have the opportunity of taller sex, not be the tolerancepublic errand measure that puts the emphasis in 3D appearance it seems that go up, and on the character of exterior surface roughness that should be put in smaller piston, fuel injector and fuel pump aperture. Honing is machined probably special agree with the treatment craft of repeatability, so that make,the ID internal diameter of these aperture achieves the exterior surface roughness of a hope. Graph contrail of surface roughness of 2 this one surface shows, with respect to height of its peak value character, this one surface is very flowing still, but the deeper trough that causes artificially in half accurate treatment, can use only store the method of film of a lube tries to solve solve selling manager of this company system Mr Moellenberg to say, what the exterior surface roughness of these modern systems sets more than far ' Ra ' (average surface roughness) level, this symbol uses Ra at the description normally bright and clean degree of spent on any account. For example, ' Rk ' the parameter of series, it is to use descriptive face microscopical and characteristic, include the appearance among them bear the weight of area curve and the peak value height that its leave in bear, and the size that the surface keeps oil groove. In honing treatment, of oilstone and equipment choose, and the movement of process designing and the operation that each honing processes are ordinal, can undertake designing according to need, in order to achieve accurate exterior surface roughness, its precision by the tribology expert of engine company (or the expert that pursues interactive surface research) make a provision. The honing treatment that retains oily quantity aperture is technology of a kind of production, in honing treatment, one matchs those who have abrade oilstone but outspread combination cutting tool makes whirligig inside bore diameter, at the same time cutting tool or spare parts make reciprocating type motion. The abrasive size that uses as a result of honing is very small, the amount is very large, the quantity of heat that produces because of this workpiece and stress are very little. A characteristic that arises by honing is to present an an across type umbriferous mode, make lube conveys along the length direction of bore diameter. On the other hand, this across type is umbriferous mode can make honing treatment can undertake critically is controlled. Of lube conveying is a among them main field, be in in, perhaps can adopt the design of cylinder surface, will rise discharge function. Along the direction of ID internal diameter of bore diameter, if exterior itself can help effective ground use lubricating oil, make its distributing more easily, so cylinder lieutenant general needs only a few oily quantity. This is meant when engine runs, only a few oily combustion. "Accordingly, our target is to maintain cylinder as far as possible inside dry, " Mr Moellenberg says. Nextpage however, another target in exterior design is, reduce sliding friction, this target is OK perhaps the compare of deferent means photograph with oil. With respect to sliding friction character, compare flowing face, its put oily quantity and the efficiency of quantity transporting oil inferior. Tribology home and other engine expert are seeking implementation the proper balance between this kind of target, the exterior design that produces from this often is complex, its characteristic is parameter of all sorts of exterior surface roughness that the bag contains exact implication. Next, the time that honing technology supplier may spend a few months goes developing a technology that can obtain surface roughness of this one surface, prove, use this one craft to be able to achieve large quantities of goals that estimate production. The graph is shown in 3 graphs exceed essence of life to grind for honing tool, main body of fuel injector of a via is on the side of its. Produce the manufacturer of this kind of spare parts, not only attention all sorts of specific surfaces are bright and clean spend parameter, and the exact figure that also pays close attention to bore diameter, because be in modern fuel injection system, the clearance fit between fuel injector main body and piston is such undertake to a new technology cheek by jowl inchoate discuss, look occasionally from the angle of treatment, the tagging of certain surface surface roughness is mutual contradiction, both be impossible to come true at the same time. Below bear honing machines him to say, besides the characteristic of these surfaces, the other ability that honing machines, include size of such as aperture, circularity and taper a kind size control, also be very important. Today, if say to produce the word that takes these parameter seriously not quite actually, that just is because of them in relevant engine treatment, be controlled closely all the time. However, in the course that pursues taller fuel efficiency, the tolerancepublic errand requirement of these area is stricter and stricter, the clearance between athletic component is in a micron ground of a micron is contractible. Sunnen company saw a such results: In practice, the production of engine of high-powered racing bicycle is made transferring to the manufacturing direction of average car engine. Mr Moellenberg listed about torque board the example that honing machines, among them torque is applied at a cylinder in, use the working case after imitate cylinder assembles engine cylinder body finally. This cylinder is machined in the honing below condition of this kind of bear. In the treatment reason below this kind of condition, how to change with the little gap measure between athletic component about. He says, present piston coordinates measure with what set between cylinder is such close together, although of cylinder and its engine cooperate a face to just produce very little change, also may make the piston loses a function. CNC MillingCNC Machining