Digital profiling control system and method based on programmable logic device

Abstract

The invention discloses a digital profiling control system and method based on a programmable logic device. The system comprises an FIFO unit, a digital profiling unit and a safety logic unit which are achieved based on the programmable logic device. Both the digital profiling unit and the safety logic unit are in communication connection with an external host through the FIFO unit, and the safetylogic unit is in communication connection with the digital profiling unit; the digital profiling unit is used for completing control output and state information reading of a main shaft and a drivenshaft to realize linkage control over the main shaft and the driven shaft; and the safety logic unit is used for collecting and processing information related to machine tool safety, to realize safetycontrol. Linkage control over the main shaft and the driven shaft is achieved through the field programmable logic device in a hardware control mode, safety signals such as limiting signals and emergency stop signals of the main shaft and the driven shaft are collected and processed, control over emergency stop, power failure and the like is achieved, and the profiling stability and reliability are improved.

Description

technical field [0001] The invention relates to the technical field of numerical control processing, in particular to a digital profiling control system and method based on programmable logic devices. Background technique [0002] At present, in the field of mechanical processing where the two feed axes such as equal-wall thickness petroleum screw drilling tools, internal ring gears, and internal spline grooves have a certain linkage relationship, mechanical profiling or software is often used to control the two feed axes separately. [0003] The profiling method guarantees the proportional relationship of the two feed axes through strict mechanical and electrical control, so as to ensure that the trajectory curve of the processed product meets the design requirements. A profile must be designed for a trajectory curve, and a profile must be changed to change a trajectory curve, and very cumbersome and complicated mechanical adjustments must be performed. However, the mold p...

AI Technical Summary

Problems solved by technology

A profile must be designed for a trajectory curve, and a profile must be changed to change a trajectory curve, and very cumbersome and complicated mechanical adjustments must be performed

However, the mold production cycle is long, the cost is high, the storage remains unchanged, and the adjustment of the replacement product is troublesome, resulting in a long production preparation cycle; on the other hand, the wear and tear of the machine tool or abnormal transmission cause quality problems, and the root cause of the quality cannot be traced

[0004] However, the software controls the two feed axes separately. Due to the different mechanical inertia of the two axes, the acceleration and deceleration time and response time are different, and the real-time problems caused by the software itself may cause the linkage relationship between the two feed axes to be inaccurate. ensure

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