Tool-crashing prevention system of numerically controlled lathe and judgment method for tool-crashing prevention system

Abstract

The invention relates to a tool-crashing prevention system of a numerically controlled lathe. The tool-crashing prevention system comprises a tool rest and the lathe on which a workpiece is clamped well. A specular reflection photoelectric switch is arranged in the middle of the tool rest. A roughing tool used for cutting the workpiece is clamped on the tool rest. The cut workpiece is fixed to the lathe through a chuck. The lathe is provided with two reflecting plates in the X-axis direction and the Y-axis direction respectively. The tool rest is moved through a stepped motor. The specular reflection photoelectric switch on the tool rest detects the position of the tool rest through optical signals reflected by the reflecting plates on the X-axis of the lathe and the Y-axis of the lathe. The moving speed and the moving direction of the tool are further judged in the mode that a control system reads the high level or the low level of a pulse signal machine of the numerically controlled lathe, so that whether a tool-crashing accident happens to the tool is judged, and emergency braking is conducted before tool crashing. The tool-crashing prevention system can effectively protect the roughing tool against the tool-crashing accident and has the characteristics of being high in accuracy, reliable in detection, low in cost and the like.

Description

technical field [0001] The invention belongs to the technical field of numerical control machining, and relates to an anti-collision tool system of a numerical control lathe and a determination method thereof. Background technique [0002] Numerical control is a technology-intensive major with many types of systems and a lot of relevant knowledge. During the training of CNC lathes, students lack practical experience in numerical control operations and theoretical knowledge of the system, which often leads to tool collisions. Accidents happen. The so-called tool collision refers to an abnormal working cutting state in which the tool (or tool holder) collides with the workpiece (or other parts of the machine tool) at the G00 command speed during the machining process of the CNC lathe. Since modern CNC lathes are generally equipped with limit switches, the possibility of the tool colliding with other parts of the machine tool is very small. Most of the collisions of general C...

AI Technical Summary

Problems solved by technology

Therefore, in the actual operation of the machine tool, attention should be paid to strictly unifying the actual setting of the machine tool with the virtual setting during programming. Any contradiction between the actual setting during processing and the virtual setting of programming may lead to a tool collision accident.

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