Aluminum semi-finished products are easily oxidized by oxygen in the air, forming a unique oxide layer (or rolled oxide scale) on the surface, which will have an adverse effect on subsequent machining, such as extrusion or welding. Therefore, under normal circumstances, this oxide layer needs to be removed before subsequent machining. For more than 30 years, Rottler Machinery Manufacturing Co., Ltd. has been committed to the development and production of machine tools with this special machining technology. One research and development focus of this machine tool is how to remove this oxide layer most economically. On the one hand, the process cycle can be shortened as much as possible, on the other hand, roughing and finishing can be combined on the same machine tool to improve the economics of machining.
In the roughing stage, as many blanks as possible should be cut in a short time, but the guiding part of the machine tool is subjected to a large force. On the contrary, the amount of material cut in the finishing process is less, and it has a higher machining accuracy.
Gantry milling machine PFA 130 for aluminum ingots and aluminum plates
Gantry milling machine PFA 130 is designed for large-area machining, such as aluminum ingots or aluminum plates. This milling machine has a modular structure and is composed of the following main components:
- Drive uprights or fixed uprights with fixed beams.
- Mobile station with 2 separate clamping areas.
- The main shaft box with vertical guide plate, main transmission device and working spindle is assembled.
The standard components are designed into steel welded structure according to the standard. Here, with the help of structural design and special reinforcement, it can achieve good shock absorption performance. The mobile table is composed of a cast base and a table top, on which a powerful feed transmission device can be installed.
The spindle box is specially designed for large tools and high machining capacity. Its special tool clamping device can use a milling power head with a diameter of 2,100 mm. Therefore, in a single milling cycle, large workpieces with a width of up to 2m can be finished, which significantly shortens the machining time.
- The power of AC spindle drive can reach 130kw in continuous operation.
- The high-precision measurement system associated with the seamless pre-stretching feed element lays the foundation for Z-axis positioning accuracy of less than 10mm.
During machining, the hydraulic clamping is perpendicular to the carriage, so as to provide additional stability during roughing; and when finishing, it guarantees the exact same height.
The modular structure of PFA 130 makes it simple, convenient and economical to meet the various needs of users. For example, after a period of use, due to changes or expansions in machining tasks, the machine needs to be modified, so only the corresponding parts need to be replaced, no long-term downtime, and high conversion costs can be achieved. This design concept provides great flexibility for highly specialized production.
If you need to modify a planer or gantry milling machine, you can modify its column and mobile worktable and combine it in a new machine. Therefore, in order to confirm its scope of application, it is necessary to check the relevant parts in advance.
Round aluminum ingot lathe DAR
The aluminum ingot lathe DAR was developed specifically for machining round aluminum ingots. The lathe can work fully automatically and can also be integrated into the production line.
The advantages of this machine tool structural design are:
- In the lower part of the machine tool, sufficient operating space is reserved for the manipulator. Therefore, the workpiece will not be restricted by space when passing through the lower part of the machine.
- Chips can be scattered freely on the continuous running chip conveyor belt.
Since all processes such as workpiece loading and unloading are fully automated, unmanned operation can be achieved for a long time.
The single round billet is first sent to the input roller table. Before the protective door of the workshop is opened, the round billet on the outside of the machine can be automatically adjusted and aligned, and the workpiece is transferred during the movement. After that, the machine tool outputs the round ingot that has been turned and discharges it to the output roller table on the back of the machine tool. At the same time, the round billets that have been aligned through the front side of the machine are placed and clamped in the operating space. The round blank ingot is clamped by two end-face fixtures, so that the outer surface can be processed in one operation.
Use 2 tools arranged adjacent to each other and mounted on a common feed carriage according to height level for machining. During the same operation, the front tool is roughed, and the rear tool is finished.
This machine tool is suitable for machining round aluminum ingots with a diameter from 125mm to 710mm, and the specific application range can be adjusted by the end clamps installed. Standard workpiece lengths range from 600mm to 1,700mm. The machining range of this machine tool covers not only most of the diameter range, but also various length ranges.
In order to shorten the machining cycle as much as possible, the main transmission device can choose 130-170kw power according to the machine tool specifications. This higher transmission power can shorten the acceleration and braking process of the workpiece, and these processes need to be considered when shortening the process cycle.