Abstract: The welding machine comprises within a frame (1), a horizontal heating plate (21), a first lower piece-holder (22), a second upper piece-holder (23), means (41) for displacing horizontally the heating plate (21), means (42) for displacing vertically (29) the heating plate (21), and means (26) for displacing vertically the second piece-holder (23). The heating plate (21) and its vertically actuating cylinder (42) constitute an assembly connected to a heating plate carrier (33) by indexing means (27) for adjusting the vertical position of the vertical displacement (29) of the heating plate (21). The first piece-holder (22) is a telescoping table with adjustable height and capable of being locked mounted on the frame (1). Thus the possibilities of adjusting and adapting the welding machine to the different sizes of pieces to be welded are increased.

Abstract: The welding machine comprises within a frame (1) a horizontal heating plate (21), a first lower piece-holder (22), a second upper piece-holder (23), means (41) for displacing horizontally the heating plate (21), means (42) for displacing vertically (29) the heating plate (21), and means (26) for displacing vertically the second piece-holder (23). The heating plate (21) and its vertically actuating cylinder (42) constitute an assembly connected to a heating plate carrier (33) by indexing means (27) for adjusting the vertical position of the vertical displacement (29) of the heating plate (21). The first piece-holder (22) is a telescoping table with adjustable height mounted on the frame (1). Thus the possibilities of adjusting and adapting the welding machine to the different sizes of the pieces to be welded are increased.