Rack bed
This is an introduction to a case of a machine tool bed frame produced by Mitsuya Corporation.
This case involves embedding a sloped flat oil pan into a square frame made of square pipes with a dimension of 100 mm. Since it serves as the base bed for mounting equipment, a 19 mm thick plate is fixed to the surface of the framed square pipes by welding after machining the flat surface. However, due to warping caused by the welding heat, not all welds are completed. Additionally, there are holes and tapped processing for attaching the equipment on the machined surface, which allows coolant liquid to seep into the frame through gaps between the thick plate and the square pipes, as well as through the holes on the machined surface, causing coolant to accumulate inside the frame. To drain the coolant liquid from inside the frame to the outside, the flat steel plate is fixed with a slope using full welding. There is a discharge hole in the 100 mm square pipe for draining from the sloped oil pan, but if left as is, it would allow entry into the square pipe. Therefore, the discharge hole is fitted with a 50 mm x 20 mm square pipe, and the entrance and exit are fully welded.
