落锤锻造

Experience in drop forging has also indicated that surface treatments of their dies have not been particularly successful.

在落锤锻造上的经验也表明它们的模具表面处理也不是特别成功。

A wide variety of forging processes are used, and Fig.9.1 shows the most common of these: drop forging. The metal is heated to a suitable working temperature and placed in the lower die cavity.

锻造有很多类型，图 9.1表示最普通的落锤锻造：金属加热到适合加工的温度，并放进下型腔里。

Although the hydraulic forging press is a more expensive piece of equipment than a drop-forge, it has advantages beside those of giving greater strength and more uniform structure to large components.

虽然这种液压锻机比落锤锻造要昂贵得多，但它除了能给予大零件较高的强度和更均匀的组织外还有其它优点。

On account of the high pressure and squeezing action, it operates with less noise and vibration than a drop-forge.

由 于较高的压力和挤压作用，它比落锤锻造噪声及振动都小得多。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。