模具的技术要求（Mould technical requirement）.docVIP

模具的技术要求（Mould technical requirement） 1. general technical requirements: Parts removing oxide skin. On the surface of the parts, there should be no scratches, scratches and other defects that damage the surface of the parts. Deburring. 2. heat treatment requirements: After quenching and tempering, HRC50 ~ 55. The parts are subjected to high frequency quenching and tempered at 350~370 DEG C, HRC40 to 45. Carburizing depth 0.3mm. High temperature aging treatment. 3. tolerance requirements: The non injection form tolerances shall comply with the requirements of GB1184-80. Allowance length tolerance allowance + 0.5mm. The tolerance zone of the casting is symmetrical to the basic dimension of the rough casting. 4. parts edges and corners: No fillet radius R5. No injection chamfer is 2 x 45 degrees. The acute angle is blunt. 5. assembly requirements: The seals must be soaked before they are assembled. Rolling bearings are allowed to be heated by oil heating. The temperature of the oil shall not exceed 100 degrees. After the gearbox is assembled, the no-load test shall be carried out in accordance with the design and process regulations. There shall be no shock or noise during the test, and the temperature rise and leakage shall not exceed the relevant standards. After the gear assembly, the contact spot and backlash of the tooth face shall comply with the provisions of GB10095 and GB11365. Sealing packing or sealant shall be allowed for assembly of hydraulic systems, but shall be prevented from entering the system. The assembly parts and components (including purchased parts, outsourcing parts) must have the certificate of inspection department before they can be assembled. The parts must be cleaned and cleaned before assembly. There shall be no burrs, edges, skins, rust, chips, oil stains, stains and dust. Before the assembly, the main Coordination dimensions of the parts, especially the interference fit size and the relative accuracy shall be reviewed. During assembly, p