Slant Bed Content and Processing Steps
The main content of CNC slant programming including analyzing the part drawings, determining the processing process, performing mathematical processing, writing program lists, making control media, performing program inspections, inputing programs, and testing workpieces. The procesing steps of slant bed lathe are as followed.
Analyzing the drawing and processing of the part, analyzing the geometric shape, size, and technical requirements of the part according to the drawing, clarifying the processing content and requirements, determining the processing plan, determining the processing sequence, designing the fixture, selecting the tool, determining the reasonable path and selecting of the tool Reasonable cutting amount, etc.
At the same time, the functions of the CNC lathe system and the capabilities of the CNC machine tool should be used to correctly select the tool setting point and cut-in method to minimize auxiliary time such as tool change and indexing.
Before programming, first, establishing a workpiece coordinate system according to the geometric characteristics of the part.
The function of the numerical control system is to formulate the processing route according to the requirements of the part drawing. On the established workpiece coordinate system, the movement trajectory of the tool is first calculated. For parts with relatively simple shapes (such as parts composed of straight lines and arcs), only the start point, endpoint of the geometric element, the center of the arc, and the coordinate value of the intersection or tangent point of the two geometric elements are calculated.
Compiling part program list
After the processing route and process, parameters are determined, the part program list is compiled according to the designated code and block format specified by the CNC system.
The structure of the NC machining program
- Program composition. It is composed of multiple program segments.
O0001; O (FANUC-O, AB8400-P, SINUMERIK8M-%) function specifies the program number, and each program number corresponds to a processing part.
N010 G92 X0 Y0; Semicolon means the end of the block
N020 G90 G00 X50 Y60;
…; subroutine can be called.
N150 M05;
N160 M02;
- Program segment format:
①Word address format: such as N020 G90 G00 X50 Y60;
The most commonly used format, modern Slant beds use it. Address N is the block number, address G and the number 90 constitute the word address for the preparation function,…
② Variable block format: such as B2000 B3000 B B6000;
Use separator B to open each word. If there is no data, the separator cannot be omitted. Commonly used in CNC wire cutting machine tools, in addition, there are 3B programming formats.
③Fixed sequence block format: such as 00701+0;
The robot controlled by the Siemens system is wrong. The above program segment means N007 G01 X+02500 Y-13400 F15 S30 M02;
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