发动机缸盖加工工艺概述

发动机缸盖加工工艺概述(中文3000字,英文1800字)
一、发动机缸盖的功用
        气缸盖是发动机的主要零件之一，位于发动机的上部，其底平面经汽缸衬垫，用螺栓紧固在气缸体上。主要功用如下：
1、封闭气缸上部，并与活塞顶部和汽缸壁一起形成燃烧室。
2、作为定置气门发动机的配气机构、进排气管和出水管的装配基体。
3、气缸盖内部有冷却水套，其底面上的冷却水孔与气缸体冷却水孔相通，以便利用循环水带走发动机的高温。
二、气缸盖的结构特点
气缸盖应具有足够的强度和刚度，以保证在气体的压力和热应力的作用下，能够可靠的工作。
气缸盖的形状一般为六面体，系多孔薄壁件，其中我们现在481缸盖上，加工的数量多达100个。铸造最薄处只有4.5毫米。

英文原文
Overview of engine cylinder head machining process
• First, the function of the engine cylinder head
              Cylinder head of the engine of the main parts, the upper part of the engine, the cylinder liner via the bottom plane, with bolts on the cylinder body. The main function is as follows:

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 1, the closed upper cylinder and the piston and the cylinder wall at the top with a combustion       chamber.
 2, as a set-valve engine valve train, intake and exhaust pipe and the outlet pipe assembly base.
 3, inside the cylinder head cooling water jacket, the bottom surface of the cooling water hole of the cylinder block cooling water hole communicating in order to use the engine temperature circulating water away.
• Second, the structural characteristics of the cylinder head
• the cylinder head should have sufficient strength and rigidity to ensure that the gas pressure and under the action of thermal stress, work reliably.
• cylinder head shape is generally hexahedral, based porous thin pieces, of which we are now 481 cylinder head, processing up to 100 the number of holes. Casting is only 4.5 mm at the thinnest.
• Third, the head material and blank manufacturing [资料来源：http://www.doc163.com]