Method for manufacturing a crankcase of a piston compressor, crankcase obtained with the method and piston compressor provided with such crankcase

A method for manufacturing a crankcase of a piston compressor, wherein the piston compressor is provided with a crankcase which is provided with recesses for receiving cylinders therein and with at least an inlet opening, the method comprising:

• providing two substantially rectangular body blanks manufactured from a flat sheet, which are each provided with two opposite end edges and two longitudinal edges;
• providing desired cylinder receiving recesses for receiving cylinders in the two body blanks;
• angle bending the body blanks in an angle bending machine for forming a body part with a limited number of folds;
• manufacturing at least two substantially flat end walls from a flat sheet;
• manufacturing a cylinder support part from a substantially rectangular sheet, comprising:
• providing cylinder receiving recesses in the substantially rectangular sheet;
• and
• subjecting the rectangular sheet to at least one angle bending operation for forming a saddle-shaped cylinder support part with a limited number, preferably one or two, of folds;
• positioning the two body parts, the cylinder support part and the at least two end walls relative to each other using a positioning tool;
• and
• connecting the end walls and the two body parts to each other with a welding robot, for forming the crankcase.