PURPOSE: A rigid guide post, a rigid guide bush, and a die set having these elements, in which even if the guide bush is tilted slightly with respect to the guide post, the tilt can be corrected, and the guide bush can be fitted easily along the outer periphery of the guide post are provided. CONSTITUTION: The rigid guide post for slidably fitting into a rigid guide bush(6) comprises a sliding portion having a fitting surface surrounding the sliding portion with a fitting clearance with a guide bush to be fitted; a tip portion, at an end of the guide post(3), having a clearance with the guide bush, the clearance of the tip portion being a little bigger than the fitting clearance; and a relief groove surrounding all the guide post between the sliding portion and the tip portion. The rigid guide bush for slidably fitting on a rigid guide post(3) comprises a sliding portion having a fitting surface on an inside surface of the sliding portion with a fitting clearance with a guide post to fit; a tip portion, at an end of the guide bush, having a clearance with the guide post, the clearance of the tip portion being a little bigger than the fitting clearance; and a relief groove surrounding the inside surface of the guide bush between the sliding portion and the tip portion. In a die set having two plates(11,12) of which one has a plurality of rigid guide bushes(6) on a face of the plate facing the other while the other has, on a face of the other plate facing the one, a plurality of rigid guide posts(3) which can slidably fit into each of the guide bushes, the guide bushes and the guide posts each comprising a sliding surface on a sliding portion, the sliding portion of each of the guide posts having a fitting clearance with each of the guide bushes, and the guide bushes and the guide posts each comprising a tip portion, at an end of the guide bushes or the guide posts, having a clearance with the guide post or the guide bush which clearance of the tip portion is a little bigger than the fitting clearance; and a relief groove surrounding an inside surface of the guide bush or an outside surface of the guide post between the sliding portion and the tip portion.

Title
Die set with guide posts and guide bushes to be slidably fitted together
Application Number
1020020037815
Publication Number
1020030004104
Application Date
July 2, 2002
Publication Date
January 14, 2003
Inventor
Takahashi Yasuhiro
Muguruma Masayuki
Kyono Tomio
Assignee
Institute Of Technology Precision Electrical Discharge Works
IPC
B21D 37/10