Production system and production method of aluminum alloy billet, and aluminum alloy billet

An aluminum alloy billet production system comprising:

• a smelting device configured to smelt a raw material of an aluminum alloy to produce molten aluminum alloy;
• a continuous casting device configured to continuously cast an aluminum alloy billet in a shape of a rod from the molten aluminum alloy smelted by the smelting device;
• a cutting device configured to cut the aluminum alloy billet produced by the continuous casting device into predetermined lengths;
• an identification mark making device configured to make an identification mark on the aluminum alloy billet cut by the cutting device;
• a loading device configured to load the aluminum alloy billet on which the identification mark has been made out of the production system, as a product;
• a speed detector configured to detect a pulling speed of the aluminum alloy billet pulled out of the continuous casting device;
• an inner defect inspection device configured to inspect an inner defect in the aluminum alloy billet before being loaded out of the production system;
• a visual inspection device configured to inspect an external appearance of the aluminum alloy billet before being loaded out of the production system;
• a billet length measuring device configured to measure a length of the aluminum alloy billet cut by the cutting device;
• and
• a production control device configured to control a production of the aluminum alloy billet, the production control device comprising:
• an operating unit configured to determine a casting time as an amount of time for casting the aluminum alloy billet on which the identification mark has been made based on a detection result obtained by the speed detector and a measurement result obtained by the billet length measuring device, and finding a casting condition of the aluminum alloy billet casted during the casting time;
• a quality evaluation unit configured to evaluate whether the aluminum alloy billet is a quality product or a defective product by comparing an inspection result obtained by the inner defect inspection device, an inspection result obtained by the visual inspection device, and the measurement result obtained by the billet length measuring device with predetermined setting conditions, and to eject from the system an aluminum alloy billet that is evaluated to be the defective product;
• and
• a storage unit configured to store, in association with the identification mark, a smelting condition of the smelting device, the casting condition of the continuous casting device, an evaluation result obtained by the quality evaluation unit, the inspection result obtained by the inner defect inspection device, the inspection result obtained by the visual inspection device, and the measurement result obtained by the billet length measuring device, and for storing, in association with the identification mark, information that the aluminum alloy billet that has been evaluated to be the quality product by the quality evaluation unit has been loaded out of the production system, as shipment information of the aluminum alloy billet.