The technological analysis of CNC precision machining involves a wide range of aspects, and here we only analyze the possibility and convenience of CNC machining.

1. The size data given on the part drawing should conform to the principle of programming convenience

(1)The dimensioning method on the part drawing should be adapted to the characteristics of CNC precision machining. On the CNC precision machining part drawing, the dimensions should be quoted on the same datum or the coordinate dimensions should be given directly. This marking method is not only convenient for programming, but also facilitates the coordination between dimensions, which brings great convenience in maintaining the consistency of design benchmarks, process benchmarks, inspection benchmarks and programming origin settings. Since part designers generally consider assembly and other use characteristics in dimensioning, they have to adopt a locally scattered labeling method, which will bring a lot of convenience to I-sequence arrangement and CNC machining.

(2)The conditions of the geometric elements constituting the outline of the part should be sufficient

The base point or node coordinates are calculated during manual programming. During automatic programming, all the geometric elements that make up the part outline are defined. Therefore, when analyzing the part drawing, it is necessary to analyze whether the given conditions of the geometric elements are sufficient. For example, arc and straight line, arc and arc are tangent on the drawing, but according to the size given in the figure, when calculating the tangent condition, it becomes the state of intersection or separation.

2. The structural manufacturability of each processing part of the part should conform to the characteristics of CNC precision machining

(1) The inner cavity and shape of the part should preferably adopt a unified geometric type and size. In this way, the tool specification and the number of tool changes can be reduced, the programming is convenient, and the production efficiency is improved.

(2) The size of the inner groove fillet determines the size of the tool diameter, so the radius of the inner groove fillet should not be too small. The quality of the part's manufacturability is related to the height of the contour to be processed, the size of the radius of the transfer arc, etc.

(3) When milling the bottom plane of the part, the fillet radius r of the groove bottom should not be too large.

(4) A unified datum positioning should be adopted. In CNC precision machining, if there is no unified datum positioning, the position and size of the contours on the two surfaces after machining will be inconsistent due to the re-installation of the workpiece.

CNC precision machining company recommended

There is an excellent CNC precision precision machining company - Shanghai Languang Precision Machinery Co., Ltd. If you want to know more about CNC precision machined parts, or are interested in our products, you can visit the website of Shanghai Languang Precision Machinery Co., Ltd.