In CNC turning the program runs through the entire part

Update:29-11-2019
Summary:

In CNC turning, the program runs through the entire par […]

In CNC turning, the program runs through the entire part. Because each person's processing methods are different, and the processing procedures are different, but the ultimate goal is to improve the production efficiency of CNC lathes, so it is particularly important to choose the most reasonable processing route. In this paper, starting from the details of determining the cutting path and selecting the appropriate G command, this paper analyzes the programming method in NC turning.

Analyze part drawings Analyze part drawings is the primary work in process preparation, which directly affects the preparation and processing results of parts. It mainly includes the following items: Analyze the geometric conditions of the machining contour: the main purpose is to deal with the unclear size and closed dimension chain on the drawing. Analyze the dimensional tolerance requirements on part drawings to determine the processing technology that controls their dimensional accuracy, such as the selection of tools and the determination of cutting consumption. Analysis of shape and position tolerance requirements: For NC cutting, the shape and position errors of parts are mainly affected by the accuracy of the machine's mechanical motion pairs. In turning, if the direction of movement along the Z coordinate axis is not flat with its main axis, the shape tolerance requirement of cylindricity cannot be guaranteed; if the direction of movement along the X coordinate axis is not perpendicular to its main axis, it cannot be guaranteed to be vertical This position tolerance is required. Therefore, it is necessary to consider the relevant schemes for technical processing before programming. Analyze the surface roughness requirements of parts, material and heat treatment requirements, blank requirements, and number of pieces. These are also parameters that cannot be ignored.

Reasonably determining the cutting path and making it the shortest is determining the cutting path is the focus of the processing program. Since the cutting path of the finishing cutting program is basically performed along the contour of its parts, the main content is to determine the roughing And the path of the empty stroke. The tool path generally refers to the path that the tool moves from the point where the tool is set until it returns to that point and ends the machining program. Including cutting path and non-cutting idle stroke such as tool introduction and cutting out. Minimizing the cutting path can save the execution time of the entire machining process, and can also reduce unnecessary tool consumption and wear of sliding parts of the machine's feed mechanism.

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