METHOD OF MAKING U-SHAPED ARTICLES BY STAMPING FROM SHEET, FOR EXAMPLE, FRONT PANEL OF HOME REFRIGERATOR DOOR Russian patent published in 2020 - IPC B21D22/02 B21D35/00 

FIELD: metal forming.

SUBSTANCE: invention relates to metal forming, particularly, to production of U-shaped articles. Method comprises feeding sheet blank in installation to position of cutting along lower plate between guides to stop, cutting of cuts at both ends of sheet stock by means of cutting puncheons, movement of semi-finished item at bending position with formation of U-shaped shape of side sides of semi-finished product by means of bending puncheons. At the cut-out cutting position, the puncheons are cut by grooving the built-in handles of the home door front door panel, and after formation of U-shaped lateral sides in next position side parts of semi-finished punch punches, clamps and matrices are converted into C-shaped profile. After that flanging of grooves for built-in handles is performed using sliding dies, clamps and puncheons and final processing of semi-finished product is carried out at position of bending of both ends of ends by punches in grooves of matrix. Both ends of ends bending are bent by puncheons using sliding dies with grooves shaped to finished article shape.

EFFECT: as a result, expansion of technological capabilities of the plant.

1 cl, 14 dwg