Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co LtdfiledCriticalFurukawa Electric Co Ltd
Priority to JP242676ApriorityCriticalpatent/JPS5286588A/en
Publication of JPS5286588ApublicationCriticalpatent/JPS5286588A/en
Perforating, Stamping-Out Or Severing By Means Other Than Cutting
(AREA)
Punching Or Piercing
(AREA)
Abstract
PURPOSE: To prolong a life of a lower die by devising a shape of a die hole in order to keep a shape and a size of the die to be always uniform even when the die surface is polished.
COPYRIGHT: (C)1977,JPO&Japio
JP242676A1976-01-131976-01-13Punching method and die for heavy metal boards with low melting points
PendingJPS5286588A
(en)