| 摘要 |
PROBLEM TO BE SOLVED: To provide a metallic die which can detect a folded angle and a strain of a workpiece, and a strain sensor unit for the metallic die. SOLUTION: Strain sensors 9 are buried in a metallic die body 3 at two or more positions in the vicinity of the working position of the workpiece W and separated from the working position within the range where the strain is generated in forming the workpiece W and in the plane perpendicular to a workpiece supporting surface 3U of the metallic die body 3 for supporting the workpiece W. A plurality of strain sensors 9 are tiltingly arranged between an upper surface 3U of the metallic die body 3 and a grooved surface 5F having a bending groove 5. The strain sensor unit is provided with the sensors 9 for detecting the strain at a plurality of positions of a base member 13 made of an insulating material. The base member 13 is configured so as to have sensor mounting surfaces 21A, 21B having the sensors 9 and connecting surfaces for integrally connecting the base member 13 to the inside surface of a mounting hole. When the base member has been mounted in the mounting hole, a clearance is formed between the sensor mounting surface and the inside surface of the mounting hole. COPYRIGHT: (C)2005,JPO&NCIPI
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