processing of the air grinder 11 it is possible to further reduce the movement stroke of the robot arm r as compared with that of the second embodiment as a result the commands applied to the robot can be simplified markedly in particular when the chamfered surface is curved further since the blade 11d of the air grinder 11 is formed into a conical shape having an apex angle of about 40 to 50 degrees even if the locus of the robot arm r is deflected since the blade can be moved so as to absorb the deflection of the robot arm r it is possible to prevent the dispersion of the chamfering work due to the deflection of the locus of the robot arm r the press processing method and device according to the present invention have been explained by taking the case of the chamfering work without being limited only to the chamfering work the press processing method and device according to the present invention can be applied to the other work for instance fig6 shows a plating device to which the press processing device according to the present invention is applied in fig6 a rotary application device 50 is attached instead of the air grinder 11 in this case when a cotton pad 52 is attached to the rotary shaft 51 of the rotary application device 50 it is possible to perform plating or gilding coating washing etc under a uniform application pressure further when the rotary.