中英文对照机械专业英语文章

发布日期:[10-12-26 11:51:49] 浏览人次:[]

indicate the equations to be used for estimating the different parameters of the grinding operation, such as the machining time and the rate of metal removal.

图8.1a和b同时简述了用于估计诸如加工时间和金属去除率之类的磨削作业不同参数的方程式。

During the surface-grinding operations, heavy workpieces are either held in fixtures or clamped on the machine table by strap clamps and the like, whereas smaller workpieces are usually held by magnetic chucks.

在平面磨削时,重的工件用夹具固定或用压板等夹紧在磨床工作台上,而小的工件则通常是用电磁卡盘固定的。

2. Cylindrical grinding. In cylindrical grinding, the workpiece is held between centers during the grinding operation, and the wheel rotation is the source and cause for the rotary cutting motion, as shown in Fig.8.2. In fact, cylindrical grinding can be carried out by employing any of the following methods:

2. 圆柱面磨削:在圆柱面磨削中,作业时工件支撑在两顶尖之间,砂轮转动是导致回转切削运动的动力源,如图8.2所示。实际上,圆柱面磨削能通过采用下列任意方法来实现:

(1) The transverse method, in which both the grinding wheel and the workpiece rotate and longitudinal linear feed is applied to enable grinding of the whole length. The depth of cut is adjusted by the cross feed of the grinding wheel into the workpiece.

(1) 横向方法:这种方法中砂轮与工件均旋转且采用线性纵向进给以保证能磨削整个长度。切削深度通过改变砂轮对工件的横向进给来进行调整。

(2) The plunge-cut method, in which grinding is achieved through the cross feed of the grinding wheel and no axial feed is applied. As you can see, this method can be applied only when the surface to be ground is shorter than the width of the grinding wheel used.

(2) 插入-切削方法:这种方法通过砂轮的横向进给完成磨削而不采用轴向进给。正如料想的那样,这种方法只在要磨削表面比所用砂轮宽度短时才使用。

(3) The full-depth method, which is similar to the transverse method except that the grinding allowance is removed in a single pass. This method is usually recommended when grinding short rigid shafts.

(3) 全深度方法:这种方法除了一次加工就能去除磨削余量外其它与横向方法相同。这种方法通常在磨削较短刚性轴时推荐使用。

Internal grinding. Internal grinding is employed for grinding relatively short holes, as shown in Fig.8.3. The workpiece is held in a chuck or a special fixture. Both the grinding wheel and the workpiece rotate during the operation and feed is applied in the longitudinal direction.

内表面磨削:内表面磨削用于相对较短的孔,如图8.3所示。工件安装在卡盘或特殊夹具上。作业时砂轮和工件都回转并且采用纵向进给。

Any desired depth of cut can be obtained by the cross feed of the grinding wheel. A variation from this type is planetary internal grinding, which is recommended for heavy workpieces that cannot be held in chucks.

通过砂轮的横向进给能得到任意所需的切削深度。这种方法的一个变体是行星式内表面磨削,当工件较重不能用卡盘固定时推荐使用。

In that case, the grinding wheel not only spins around its own axis but also rotates around the centerline of the hole that is

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