Esboniad manwl o sawl strwythur stripio o stampio yn marw yn y broses stampio, mae'r strwythur stripio yn ddyluniad allweddol i sicrhau y gellir gwahanu rhannau stampio a deunyddiau gwastraff yn llyfn oddi wrth y marw. Mae gwahanol ddulliau stripio yn effeithio'n uniongyrchol ar effeithlonrwydd cynhyrchu, bywyd marw ac ansawdd cynnyrch. Mae'r canlynol yn strwythurau stripio cyffredin ac mae eu nodweddion technegol wrth stampio yn marw: 1. Plât streipiwr sefydlog (plât streipiwr sefydlog) Egwyddor strwythurol: mae'r plât streipiwr anhyblyg yn sefydlog ar y marw neu'r templed, ac mae'n cynnal bwlch sefydlog gyda'r dyrnu (fel arfer 1. 5-2 gwaith y trwch materol). Mae'r deunydd yn cael ei wasgu wrth stampio, ac mae'r plât streipiwr yn gorfodi'r deunydd i'w dynnu yn ystod y strôc yn ôl. Senarios cymwys: blancio plât trwchus (trwch plât yn fwy na neu'n hafal i 1.5mm) dyrnu manwl uchel (megis dalen ddur silicon modur) Gorsaf garw manteision marw blaengar: strwythur syml, anhyblygedd cryf, dim colli cydran elastig. Grym stripio sefydlog, sy'n addas ar gyfer stampio cyflymder uchel (yn fwy na neu'n hafal i 500 gwaith/munud). Anfanteision: Methu fflatio'r deunydd, yn dueddol o warping. Yn sensitif i amrywiadau trwch materol, mae angen rheolaeth fanwl gywir ar y bwlch. Pwyntiau Dylunio: Clirio Unochrog Rhwng y Plât Stripper a'r Punch: C=(1.5∼2) × T
(t yw'r trwch materol). Rhaid i hyd canllaw pin y canllaw fod yn fwy na neu'n hafal i 1.5 gwaith y diamedr dyrnu i atal llwytho ecsentrig rhag atal. 2. Egwyddor Strwythurol Stripper Elastig: Darperir y grym elastig gan ffynhonnau, rwber polywrethan neu ffynhonnau nitrogen i wasgu'r deunydd yn ystod y broses stampio, a rhyddhewch y deunydd yn elastig ar ôl i'r strôc gael ei gwblhau. Strwythur nodweddiadol: Plât streipiwr y gwanwyn, dadlwytho padiau rwber, alldafliad gwanwyn nitrogen. Senarios cymwys: Stampio plât tenau (trwch plât sy'n llai nag neu'n hafal i 1mm, fel cragen metel ffôn symudol) manwl gywirdeb prosesau plygu ac ymestyn y mae angen pwyso arnynt i atal crychau (megis terfynellau cysylltydd) manteision: swyddogaethau deuol pwyso a dadlwytho i atal symud a diffyg sylweddol. Addasu i amrywiadau trwch materol a bod â goddefgarwch nam cryf. Anfanteision: Mae cydrannau elastig yn dueddol o flinder (mae bywyd y gwanwyn tua 500, 000 gwaith, mae polywrethan tua 300, 000 gwaith). Gall stampio cyflym achosi dadlwytho anghyflawn oherwydd effaith hysteresis. Pwyntiau Dylunio
Mae cywasgiad rwber polywrethan yn llai na neu'n hafal i 30% er mwyn osgoi heneiddio cynamserol.
3. Egwyddor strwythurol system ejector: Defnyddiwch ejector, plât ejector neu wialen gwthio niwmatig i ddileu'r rhannau wedi'u stampio o'r marw. Mathau cyffredin: ejector mecanyddol (cyswllt gwialen), ejector niwmatig, ejector hydrolig. Senarios cymwys: Mae dadleoli rhannau wedi'u tynnu'n ddwfn (fel cwpanau dur gwrthstaen), rhannau â siapiau cymhleth (hawdd eu mynd yn sownd yn y marw), llinellau cynhyrchu awtomataidd (sy'n cydweithredu â thrinwyr) yn manteision: Gall grym alldaflu mawr a rheolaidd (systemau niwmatig/hydrolig gyrraedd sawl tunnell o dafarn). Gellir rheoli'r amseriad alldafliad yn gywir er mwyn osgoi dadffurfiad rhannau. Anfanteision: Strwythur cymhleth a galwedigaeth gofod llwydni mawr. Mae systemau niwmatig/hydrolig yn cynyddu costau cynnal a chadw. Pwyntiau Dylunio: Mae angen i'r dosbarthiad alldaflu osgoi ardaloedd swyddogaethol cynnyrch (megis arwynebau selio).
4. Pneumatic assisted demolding (Air Blow-off) Structural principle: A compressed air nozzle is set in the mold, and air is blown to assist the parts or waste to be detached at the moment of mold opening. Often used in conjunction with the ejector. Applicable scenarios: lightweight thin-walled parts (such as aluminum foil parts) products with high surface requirements (avoiding contact marks of ejector pins) stations where small waste is difficult to discharge (such as micro-hole punching) Advantages: non-contact stripping to avoid scratches on parts. Directional removal of dead corner waste. Disadvantages: dependent on stable air source, high energy consumption. Noise is high, and a muffler needs to be installed. Design points: nozzle aperture: 0.5-2mm, air pressure 0.4-0.6MPa. Injection angle 30°-45° to avoid airflow directly hitting the mold cavity. 5. Scrap Cutter Structural principle: a cutter is set at the end of the progressive die to divide the continuous waste into small segments for easy collection. It is divided into upper cutting, lower cutting and side cutting. Applicable scenarios: high-speed progressive die (such as electronic connector production) stamping line with high risk of waste winding long strip waste processing (such as heat sink punching) Advantages: prevent waste accumulation from causing mold jamming. Improve the operation stability of the automation line. Disadvantages: Increase mold complexity and blade wear points. The cutting knife needs regular maintenance (lifespan of about 1 million times). Design points: Cutting knife angle: 30°-45°, reduce shear force. Waste length: generally ≤200mm, too long and easy to sag and get stuck. 6. Combined Stripping Structure (Combined Stripping) Structural principle: combined elastic unloading + ejector device + pneumatic assistance, multi-stage collaborative stripping. For example: first stripping by the elastic unloading plate, then ejected by the ejector rod, and finally cleared by air blowing. Applicable scenarios: ultra-thin materials (t≤0.1mm, such as copper foil shielding cover) High viscosity materials (such as silicone gaskets) Micro parts stamping (such as medical needles) Advantages: Thorough stripping, adaptable to extreme working conditions. Redundant design improves reliability. Disadvantages: Complex structure, mold cost increased by 30%-50%. The timing of multi-mechanism action needs to be precisely controlled. Selection Recommendation Table Stripping Structure Applicable Plate Thickness Speed Accuracy Maintenance Cost Fixed Stripper ≥1.5mm Very High (>5 0 0spm) streipiwr elastig isel canolig 0. 2-1. 5mm o uchder (200-400 spm) ejector canolig uchel unrhyw gyfrwng (<200spm) Very High High Pneumatic Assist ≤0.5mm Very High Very High High Scrap Cutting Knife Any High Low Low Composite Stripper Structure ≤0.2mm Medium Very High Very High Summary The design of the stripper structure needs to comprehensively consider four factors: material properties, stamping speed, precision requirements, and cost budget: High-speed stamping of thick plates: fixed stripper plates are preferred, supplemented by scrap cutting knives. High-precision punching of thin plates: elastic stripper + pneumatic assistance is the golden combination. Deep drawing complex parts: ejector + elastic stripper plate double protection. Micro-stamping extreme working conditions: composite stripper structure is the only choice. Future trends: Technologies such as intelligent stripping systems (such as pressure sensors that provide real-time feedback to adjust the ejector force) and self-lubricating stripping plates (with the life of graphene coating increased by 5 times) will further improve stripping efficiency and reliability.
