机用虎钳结构缺点及使用中的隐患。机用虎钳有结构简单、夹紧力大、操作和维护方便等特点。但由于其必须具有广泛的适用性和操作的便捷性，其螺母与丝杆之间、活动座与虎钳体之间存在着较大的配合间隙，圣霖国际联接机采购，导致在装夹一些加工精度要求较高的产品时难以达到要求。
The structural shortcomings of the machine vise and the hidden danger in the use. The machine tool has the characteristics of simple structure， large clamping force， easy operation and maintenance. But because of its wide applicability and convenient operation，圣霖国际联接机选购， there is a large gap between the nut and the screw rod， the movable seat and the vice body， which results in the difficulty of meeting some requirements when clamping some products with high machining accuracy.
机用虎钳的结构及原理。机用虎钳是机械加工中常用的装夹机构，其结构如图1所示。其主要工作原理：转动方头带动丝杠，圣霖国际联接机，在螺母（通过紧固螺钉固定在虎钳体上）的作用下，圣霖国际联接机报价，做螺旋运动的丝杠带动与之联接的活动座沿丝杠轴线方向来回移动。
The structure and principle of machine vise. Machine vise is a common clamping mechani** in mechanical processing. Its structure is shown in Figure 1. The main principle: rotation of the lead screw nut in the square， (fixed in the vise body through a fastening screw) under the action of moving spirally driven screw connected with the movable seat to move back and forth along the screw axis.
键是一种标准件，通常用于联接轴与轴上旋转零件与摆动零件，起周向固定零件的作用以传递旋转运动和扭矩，楔键还可以起单向轴向固定零件。而导键、滑键、花键还可用作轴上移动的导向装置。 根据键的结构形式，键联接可分为平键联接、半圆键联接、楔键联接和切向键联接等几类。
The key is a standard part， which is usually used to connect the rotating parts and swing parts of the shaft and the axle to move the fixed parts to tran**it rotary motion and torque， and the wedge key can also play a one-way axial fixation part. The guide， slippery key and the spline can also be used as a guiding device for moving on the axis. According to the structure of the key， key joins can be divided into a flat bond， a semicircle bond， a wedge bond and a tangent bond.
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