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CNC machining parts clamping

2020-03-11 09:12:20
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Part clamp

First, the basic principles of positioning and installation

Numerical control machine tool

When machining parts on CNC machine tools, the basic principles of positioning installation are reasonable selection of positioning datum and clamping scheme. The following points should be noted when choosing:


1. Strive to unify the benchmark of design, process and programming calculation.


2, as far as possible to reduce the number of clamping, as far as possible after a positioning clamping, processing all the surface to be processed.


3, avoid the use of manual adjustment machining scheme, in order to give full play to the effectiveness of CNC machine tools.


Second, the basic principle of selecting fixtures

The characteristics of CNC machining put forward two basic requirements for the fixture: one is to ensure that the coordinate direction of the fixture is relatively fixed with the coordinate direction of the machine tool; The second is to coordinate the size relationship between the parts and the machine coordinate system. In addition to this, consider the following:


1, when the parts processing batch is not large, should try to use the combination of fixtures, adjustable fixtures and other general fixtures, in order to shorten the production preparation time, save production costs.


2, in the mass production to consider the use of special fixtures, and strive to simple structure.


3, the loading and unloading of parts should be fast, convenient and reliable to shorten the standstill time of the machine tool.


4, the parts on the fixture should not hinder the machining of the surface of the parts, that is, the fixture should be open, its positioning, clamping mechanism components can not affect the machining of the tool (such as collision, etc.).


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