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Simple Design, Short Tool Change Time And High Reliability
Jul 09, 2018

According to the realization principle, the automatic tool change has a rotary tool change tool, a change of the spindle head change tool, and a tool changer automatic tool change.

The working principle of the rotary tool changer is similar to the indexing workbench. The new and old tools are exchanged by the angled rotation of the tool holder.

When replacing the spindle head change mode, first place the tool on each spindle head. The spindle head is replaced by the rotation of the turret to achieve the purpose of changing the tool. These two methods are simple in design, short in tool change time and high in reliability. The disadvantage is that the number of stocking tools is limited, especially the spindle system that replaces the spindle head changing method has a poor rigidity, so it is only suitable for machine tools with fewer processes and less precise requirements.

The automatic tool change mode with the tool magazine is composed of a tool magazine, a tool selection system, a tool exchange mechanism and the like, and the structure is complicated. Although this method has many disadvantages such as many movements in the tool change process and complicated design and manufacture, but because of its high degree of automation, it is widely used when there are many complicated parts in the processing process.

The automatic tool change system generally consists of a tool magazine and a robot. The automatic tool change system of different machine tools may be different, which is the unique part of the machine tool.

1. Tool magazine

As the name suggests, it is the warehouse where the tools are stored, that is, the tools used to machine the parts are stored here, and are grabbed by the robot during the machining process. There are two types of tool magazines: disk magazine and chain tool magazine.

(1) Disc magazine The magazine capacity is about 30. If the magazine capacity is too large, the tool's moment of inertia will be too large. Generally, small and medium-sized machining centers use more disc magazines.

(2) The chain magazine has a large magazine and can load 100 tools or even more. The chain magazine has a large capacity, mainly because the processing of the box parts is large, and the number of tools used is correspondingly increased.

2. Robot

The form has a single arm, a double arm, etc., and some machining centers do not even have a robot, but the tool is changed by the relative movement of the tool magazine and the main shaft.


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