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Horizontal five-axis machining center

The rotary axis of this type of machining center also has two methods. One is that the horizontal spindle swings as a rotary axis, coupled with a rotary axis of the workbench, to achieve five-axis linkage processing. This setting method is simple and flexible. If the spindle needs to be switched vertically and horizontally, the worktable only needs to be indexed and positioned, and it can be simply configured as a three-axis machining center with vertical or horizontal switching. The vertical and horizontal conversion of the spindle and the indexing of the worktable enable pentahedral processing of the workpiece, which reduces manufacturing costs and is very practical. The worktable can also be equipped with CNC axes, with a minimum indexing value of 0.001 degrees, but without linkage, to become a four-axis machining center that converts vertically and horizontally, adapting to different processing requirements, and the price is very competitive.

The other is the traditional workbench rotary axis. The A-axis of the workbench set on the bed generally has a working range of +20 degrees to -100 degrees. There is also a B-axis of the turntable in the middle of the workbench, and the B-axis can rotate 360 degrees in both directions. The linkage characteristics of this horizontal five-axis machining center are better than the first method, and it is often used to process complex curved surfaces of large impellers. The rotary axis can also be equipped with circular grating feedback, and the indexing accuracy can reach a few seconds. Of course, the structure of this rotary axis is relatively complex and the price is expensive.

At present, the horizontal machining center worktable can be larger than 1.25m2, which has no impact on the first five-axis setting method. However, the second five-axis setting method is more difficult, because it is really difficult for a 1.25m2 workbench to rotate the A-axis and link it with the B-axis rotary table in the middle of the workbench. The spindle speed of a horizontal machining center is generally above 10,000 rpm. Since the horizontal spindle has its own gravity in the radial direction, the radial force on the bearings is uneven when running dry at high speed. In addition, a larger BT50 tool holder must be used. Generally up to 20,000rpm. The horizontal machining center has a rapid feed rate of more than 30-60m/min, a spindle motor power of more than 22-40KW, and a tool magazine capacity that can be increased from 40 to 160 as needed. The processing capacity far exceeds that of ordinary vertical machining centers. It is a heavy-duty machining center. The first choice for machining.

Most machining centers can be designed with double workbench exchange. When one workbench is running in the processing area, the other workbench changes workpieces outside the processing area to prepare for the processing of the next workpiece. The time of workbench exchange depends on the workbench. The size can be completed from a few seconds to tens of seconds. The latest designed machining center is structurally suitable for forming a modular manufacturing cell (FMC) and a flexible production line (FMS). The modular manufacturing unit generally consists of at least two machining centers and four exchange workbenches. The machining centers are all placed side by side. , the exchange workbench is arranged in a line in front of the machine tool. If there are many exchange workbench, it can be arranged in two rows or even a double-layer design. There is a station on each side as the location for the upper and lower workpieces. The exchange workbench on the other stations is equipped with workpieces waiting to be processed. A small car will follow the system instructions to send the exchange workbench containing the workpieces to the machining center, or from the machining center. Take out the exchange workbench that has been processed and send it to the next station or directly to the unloading station to complete the entire processing operation. In addition to the trolley and exchange workbench, the flexible production line also has a unified tool library. There are usually hundreds of tools. The identity code information of the tools is stored in the system, and then sent to the machining center through the tool delivery system, and the tools are used. After completing the tool retrieval, the flexible production line often requires an FMS controller to direct the operation.

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