Rapid manual tool changing mechanism of numerical control milling machine

Abstract

The invention discloses a rapid manual tool changing mechanism of a numerical control milling machine, comprising a machine tool box which is provided with a hollow spindle in a rotating manner; a draw bar is arranged in the inner bore of the spindle; a coniform inner bore is arranged on the external end face of the spindle; a tool changing seat is fixedly installed outside the machine tool box; a cam is installed in the tool changing seat in a rotating manner; a cam mechanism is formed by the cam and a mandril below the cam; a bolt is connected between the lower end of the mandril and the draw bar; a locknut is screwed on the draw bar; a butterfly spring sheathed on the draw bar is positioned between steps of the locknut and the inner bore of the spindle; and the external end of the draw bar is fixedly connected with a tool holder. The tool changing speed of the rapid manual tool changing mechanism is increased by over 10 times, thus saving plenty of tool changing time, greatly lowering labor intensity of operators, greatly lowering the use cost and having obvious economic benefit.

Description

technical field [0001] The invention relates to a milling machine, in particular to a fast manual tool change mechanism for a numerically controlled milling machine. Background technique [0002] The micro economical CNC milling machine can complete milling, drilling, expanding, boring, reaming, tapping and other processes. Its processing plant efficiency is usually 3-4 times that of ordinary machine tools (such as ordinary milling machines, ordinary boring machines, and ordinary drilling machines). The machining accuracy is much higher than ordinary machine tools. It is suitable for processing various discs, shells and box parts. It is suitable for medium and small batches and multi-variety production. Therefore, it is widely used in production, maintenance and teaching. Especially in foreign countries, it is more widely used in family and teaching. At present, the economical CNC tool change mechanism usually adopts two methods: one is to change the tool with the knife...

AI Technical Summary

Problems solved by technology

However, the machine tool of this kind of tool change method not only needs to be equipped with a tool cylinder, but also needs to be equipped with an air pump (that is, a high-pressure air source), which is inconvenient to use in school teaching, personal workshops, and foreign families. The tool cannot be changed; the second is to rely on the tightening and loosening of the pull rod to manually change the tool, that is, the rotating pull rod relies on the thread pair to tighten or loosen the tool handle to achieve the purpose of tool change

This tool change method does not require a tool cylinder and air source, and the cost is low, but the operator has a high labor intensity, a long tool change time, and low efficiency. This tool change method does not match the high efficiency performance of CNC milling machines.

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