機械外文翻譯--連桿，內燃機-資料下載頁
2025-05-12 00:01本頁面
【導讀】在活塞往復式發(fā)動機內，連桿連接著裝在曲柄或曲軸上的活塞。圖格王朝的一位國王泵水——這些機器的其中之一就使用了連桿。成往復運動可能需要依靠連接到曲柄上的連桿。桿，或使用鑄鐵，如制造摩托車連桿時就使用鑄件。于是當連桿作上下運動和繞曲柄旋轉時連桿與活塞之間的夾角就發(fā)生改變。經(jīng)常性的壓力，但連桿仍能相對于活塞轉動即“浮動腕銷”。力造成連桿失效。此外，扭緊連桿螺栓時，應非常注意扭矩的大??；通常這些螺栓。連桿的大端被制造成一個整體，并使其在機械加工之。軸瓦因擠壓而與連桿分離，結果導致了。然而，對一已知的發(fā)動機缸體來說，連桿的長度加上活塞行程，其和是一個。高性能航空發(fā)動機的通常解決方案是使用一個“叉狀”連桿。形連桿的V形內燃機，以及對置式活塞內燃機的曲柄連桿機構都屬于這一類。運動，所以這種機構有時也稱為“關節(jié)曲柄連桿機構”。一個曲柄可以同時套上幾副連桿和活塞，這種結構可使內燃機長度縮短，結構緊湊，
【正文】 gest lateral pressure so that the pistons in the expansion programme and pressure reduction programme in the cylinder wall at the role of lateral pressure on both sides of the relatively uniform size. Vicelink the main crank linkage is characterized by: the internal bustion engine cylinder with a main link, the other out vicelink cylinder used, these are not direct link to the bottom of the crank pins, but on sale through the deputy link with in the main link of the big heads, formed a joint movement, such institutions also sometimes referred to as joint song stalk linkage .Crank linkage in the joint, a crank can put a few of connecting rod and piston, This structure will shorten the length of the internal bustion engine, pact and widely used in highpower lootives used tanks and Vshaped internal bustion engine. Boring In machining, boring is the process of enlarging a hole that has already been drilled (or cast), by means of a singlepoint cutting tool (or of a boring head containing several such tools), for example as in boring a cannon barrel. Boring is used to achieve greater accuracy of the diameter of a hole, and can be used to cut a tapered hole. The term boring is also sometimes used for drilling a hole. Machine Boring The boring process can be carried out on a lathe for smaller operations, but for larger production pieces a special boring mill (work piece rotation around a vertical axis) or a horizontal boring machine (rotation around horizontal axis) are used. A tapered hole can also be made by swiveling the head. The boring machines (similar to the milling machines such as the classic Van Norman) e in a large variety of sizes and styles. Work piece diameters are monly 14m (312 ft) but can be as large as 20m (60ft). Power requirements can be as much as 200 hp. The control systems can be puterbased, allowing for automation and increased consistency. Because boring is meant to decrease the product tolerances on preexisting holes, several design considerations must be made. First, large lengthtoborediameters are not preferred due to cutting tool deflection. Next, through holes are preferred over blind holes (holes that do not traverse the thickness of the work piece). Interrupted internal working surfaces— where the cutting tool and surface have discontinuous contact— should be avoided. The boring bar is the protruding arm of the machine that holds cutting tool(s), and must be very rigid. Forging Forging is the term for shaping metal by using localized pressive forces. Cold forging is done at room temperature or near room temperature. Hot forging is done at a high temperature, which makes metal easier to shape and less likely to fracture. Warm forging is done at intermediate temperature between room temperature and hot forging temperatures. Forged parts can range in weight from less than a kilogram to 170 metric parts usually require further processing to achieve a finished part.
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