Aluminum Slab/Ingot Scraping Machine

Transmission Device and Machine Body

The transmission device and machine body are designed with a scraping transmission device composed of a welded steel cylinder structure fixed between two machine beds. The scraping transmission is guided by four rails to adjust the scraping head height. The actual height adjustment is achieved through two ball-bearing spindles driven by servo motors. The scraping head transmission device is connected to the scraping shaft via a gear-type coupling, allowing precise height adjustments of the scraping head.

A spray lubrication system operates during scraping. The spray device includes a storage container, a compressed air injector, spray nozzles, necessary solenoid valves, and spray equipment.

The machine body is a welded steel structure equipped with clamping rails. The clamping rails feature clamping devices suitable for each aluminum ingot, allowing infinite adjustments to different ingot widths using a spindle and a frequency-controlled gear brake motor.

Actual clamping operations are performed using stroke hydraulic cylinders, which are mounted on mechanically adjustable clamping brackets.

The machine is also equipped with telescopic covers to protect the machine’s sliding rails from dust and chips.

Main Scraping Head and Housing

The main scraping head is made from solid steel and flanged to the scraping shaft of the scraping transmission. The scraping head includes circumferential pockets for cutting tools, which are securely fastened with screws. It features a labyrinth-sealed scraping cover for optimized chip handling and to prevent low-pressure zones near the scraping shaft bearings.

The scraping head is equipped with cutting tools, with the tooling system consisting of robust heavy-duty cutter holder specifically tailored for the scraping head. The holder design and the recess shape of the scraping head contribute to efficient chip suction. Each cutter holder includes cutter seat and support disk. Tungsten carbide blades are securely and vibration-free mounted in the cutter seat. Clamping screws fasten the blades in place, while locking bolts provide additional security. Secondary precision cutters are mounted at a 180° offset angle.

The chip collection cover is designed to remove both short and long aluminum chips around the scraping head. Surrounding the scraping head, the chip collection cover’s design ensures high efficiency for the suction system. The verified design of the scraping head and tools ensures reliability. Furthermore, the chip collection cover is equipped with a cutting depth monitor. If the maximum cutting depth is exceeded, the equipment automatically halts the feed to the clamping bracket.

Edge Scraping Device

The scraping machine is equipped with a combined edging mechanism to simultaneously scrape the upper and side surfaces of aluminum ingots. It includes two corner heads for scraping the edges. Upon request, an additional horizontal head for vertical edges can be added. The two corner-edge scraping heads can be positioned at various angles within a certain range. They are mounted on sliding rails on both sides of a cross joint coupling for horizontal positioning.

The edge scrapeing device features scale display. Once the aluminum ingot reaches the scraping position, the scraping bearing housing is clamped, and the scraping shaft moves via adjustable double-row cylindrical roller bearings with reliable performance. Axial loads are absorbed by two deep-groove thrust ball bearings, which are lubricated. A three-phase DC motor powers the scraping shaft, with speed monitored to ensure proper operation.

Chip Collection System

Chips captured by the housing are transported via pipelines to a chip crusher. The chip crusher, specifically developed for aluminum ingot scraping, is designed to ensure effective chip handling and low airflow resistance.

The chip crusher is driven by a three-phase motor and a hydraulic coupling. Both the crusher and motor are mounted on a common base frame. The crusher rotor is equipped with two cutting-edged movable suspended hammers. Each hammer has a second cavity designed exclusively for marking. A hammer can be replaced three times before requiring refurbishment.

Chips are blown by a fan into a cyclone separator, where they are separated from the air. However, this system cannot separate dust from the air.

For dust removal, an additional dust extraction system is required. Chips from the cyclone separator are sent to an intermediate collection station. They are then transferred via a vibrating washing trough to a belt conveyor and finally to a waste container.