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 Ling-Ling YiinfiledCriticalLing-Ling Yiin
Priority to TW84102444ApriorityCriticalpatent/TW268889B/en
Application grantedgrantedCritical
Publication of TW268889BpublicationCriticalpatent/TW268889B/en
A process of producing belt clamp piece pivot of belt head, which mainly comprises the following steps: forming of clamp piece pivot substrate, which comprises using a punch mold to punch a flat substrate with symmetrical contour on a flat iron plate; forming of pivot hole, which comprises punching a pair of pivot hole at corresponding positions on two sides of the substrate; forming of clamp piece pivot, which comprises using appropriate punch mold to punch the substrate installed with corresponding pivot holes into an article which has two sides folded inward and corresponding pivot holes with center line on the same axis; which is characterized in that the thickness of the substrate is larger than or equal to 1 mm and the two sides of the interior, during punching of the pivot holes, is punched into non-penetrated dent shape and the outer surface of the substrate corresponding to the position of pivot hole forms protrusion due to punching and is polished by grinding tool to obtain a smooth outer surface without pivot hole.
TW84102444A1995-03-151995-03-15Process of producing belt clamp piece pivot of belt head
TW268889B
(en)
Punch and die elements for numbering of registration plates of motor vehicles - includes punch elements formed with conventional external cutting edge that projects relative to base and with internal cutting edge that is detached from surface of corresponding internal base