Inner air-expansion cutting shaft

Abstract

The invention discloses an inner air-expansion cutting shaft which comprises an air-expansion shaft, split rings and a protecting pipe. During the running process, the whole inner air-expansion cutting shaft is capable of flexible rotating, the inner surface of a tubular material to be cut is clamped through expansion of the split rings, and the inner surface is not damaged; and an air-expansion section is sleeved with the split rings so that the split rings can be changed conveniently. When misoperation occurs, at the left end, the split rings are cut firstly and air leakage is generated, while at the right end, the protecting pipe is cut firstly and cutting sound is changed, at this time, workers can discover abnormity and stop cutting immediately, so that the air-expansion shaft is protected. Moreover, the overall length of the tubular material to be cut is covered in the processing range, and processed raw materials are saved.

Description

technical field [0001] The invention relates to a clamping device of a soft material production machine tool, in particular to an inner air-expanded cutting shaft. Background technique [0002] At present, in cutting production equipment for soft materials such as paper rolls, cardboard, and thin-walled steel cylinders, there are two ways to fix tubular materials to be processed: internal clamping with air claws and internal clamping with mechanical claws. Clamping and fixing raw materials in the air claw must have a protective tube that is longer than the material to be processed, which wastes the length of the protective tube and tends to slip when clamping the PE tube. The internal clamping of the mechanical claws avoids the waste of paper tubes, etc., but the mechanical expansion sleeve cannot fix the protective device, and the round knife cannot be cut on it, so when the width of the cut material is smaller than the mechanical internal expansion sleeve, it will be waste...

AI Technical Summary

Problems solved by technology

Clamping and fixing the raw material in the air claw, the length of the protective tube must be longer than the material to be processed, which wastes the length of the protective tube and is easy to slip when clamping the PE tube

The internal clamping of the mechanical claws avoids the waste of paper tubes, etc., but the mechanical expansion sleeve cannot fix the protective device, and the round knife cannot be cut on it, so when the width of the cut material is smaller than the mechanical internal expansion sleeve, it will be wasted. Material

At the same time, the mechanical structure of the above two methods is complicated, the cost is high and it is not easy to repair

[0003] For example, in the CN103009418B paper tube cutting machine, the output shaft of the speed-regulating motor on the outside of the clamping disc is provided with an air expansion shaft, and the air expansion shaft includes an inflation nozzle and a key bar. If the paper tube on the expansion shaft is not handled properly, the cutting knife will cut the air expansion shaft, and the installation structure is also complicated

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