dra ★作业内容:画出平口钳的装配图 Contents: complete a assembly drawing of a flat nose clamp ★目的:进一步培养阅读零件图及画装配图的能力 Objective: improve students' abilities of detail drawing drawing plotting ★要求 Requirements: 1在画装配图之前,必须对所画的平口钳有全面的认识,即要充分了解它的工 作原理、结构特点,并仔细阅读已给定的一套零件图,想象出每个零件的形状根据 平口钳的示意图,找出各零件间的装配关系。 Complete information of the flat nose clamp, work principles and structures for example, should be obtained before starting its assembly drawings. First, detail drawings are read carefully and shape of each part is imagined; then assembly relationships between parts are specified by sketches of the clamp 2根据平口钳的示意图和零件图画出它的装配图,由于该部件较复杂,所以必 须认真选定表达方案,并考虑标注尺寸、序号、明细栏、标题栏等所占位置,选定 图幅,合理布局,并按画装配图的步骤进行,完成全图。 assembly drawing is finished according to the sketches and detail drawings. First, representation methods should be selected carefully for the complexity of the assembly Then, sizes of drawing sheets are decided according to positions of dimensions, item references, item lists and title blocks. Layout of drawings should be reasonable. Finally assembly drawing is finished accord ing to the steps of drawing assembly drawings ★平口钳工作原理 Work principles of flat nose clamp: 平口钳是用来夹持工件进行加工用的部件。它主要由固定钳身、钳口板、丝杠 和套螺母等组成。丝杠固定在固定钳身上。转动丝杠可带动套螺母作直线移动。套 螺母与活动钳口用螺钉连成整体,因此,当丝杠转动时,活动钳口就会沿固定钳身 移动。这样钳口闭合或开放用以夹紧或松开工件。 Flat nose clamp is used to grip parts. It is mainly composed of a fixed body,a movable clamp body, a screw and a nut. The screw is fixed on the fixed clamp body, and the nut on the movable clamp body. When the screw is rotated, the nut moves in straight way, which makes the movable clamp body moves along the fixed clamp body, and thus makes the mouth of the clamp open or close to grip or release the part3 drawings ★ 作业内容：画出平口钳的装配图 Contents: complete a assembly drawing of a flat nose clamp ★ 目的：进一步培养阅读零件图及画装配图的能力 Objective: improve students’ abilities of detail drawing reading and assembly drawing plotting ★ 要求 Requirements: 1.在画装配图之前，必须对所画的平口钳有全面的认识，即要充分了解它的工 作原理、结构特点，并仔细阅读已给定的一套零件图，想象出每个零件的形状,根据 平口钳的示意图，找出各零件间的装配关系。 Complete information of the flat nose clamp, work principles and structures for example, should be obtained before starting its assembly drawings. First, detail drawings are read carefully and shape of each part is imagined; then assembly relationships between parts are specified by sketches of the clamp. 2.根据平口钳的示意图和零件图画出它的装配图，由于该部件较复杂，所以必 须认真选定表达方案，并考虑标注尺寸、序号、明细栏、标题栏等所占位置，选定 图幅，合理布局，并按画装配图的步骤进行，完成全图。 Assembly drawing is finished according to the sketches and detail drawings. First, representation methods should be selected carefully for the complexity of the assembly. Then, sizes of drawing sheets are decided according to positions of dimensions, item references, item lists and title blocks. Layout of drawings should be reasonable. Finally assembly drawing is finished according to the steps of drawing assembly drawings. ★ 平口钳工作原理 Work principles of flat nose clamp： 平口钳是用来夹持工件进行加工用的部件。它主要由固定钳身、钳口板、丝杠 和套螺母等组成。丝杠固定在固定钳身上。转动丝杠可带动套螺母作直线移动。套 螺母与活动钳口用螺钉连成整体，因此，当丝杠转动时，活动钳口就会沿固定钳身 移动。这样钳口闭合或开放用以夹紧或松开工件。 Flat nose clamp is used to grip parts. It is mainly composed of a fixed body, a movable clamp body, a screw and a nut. The screw is fixed on the fixed clamp body, and the nut on the movable clamp body. When the screw is rotated, the nut moves in straight way, which makes the movable clamp body moves along the fixed clamp body, and thus makes the mouth of the clamp open or close to grip or release the part