Board piece punch craft and mould design

According to the operating mode condition of the user computation gets N value, differ namely the product below operating mode utility, its N value also differs. Accordingly this spare parts is when figuration, need section figuration. When section figuration, the problem of existence and difficulty have: ① sends makings precision; When ° figuration, paragraph whether to achieve precision to ask with the moire span between Duan Zhi; Board piece circumjacent should level off, not be patient of is corrugate wait for a phenomenon; How is ④ 1 piece board piece among already but the ripple with successive figuration, also but figuration platform. 2 experiments basis board piece part drawing, the design created 1 pair of simple and easy patterns, the mould includes protruding, sunken model only. Board piece press 3 paragraphs of figuration. Estimate above all every paragraphs go up in length direction (360mm) contractive quantity is 2mm, go up in width direction (800mm) contractive quantity is 2mm.

Place expects dimension is surely temporarily below: 802mm 1mm.

Pass computation, when every paragraphs of figuration, the pressure of need is 18.

8MPa, so, figuration equipment chooses engine of 20000kN oil pressure. Send makings device to use tigidity to send work or material rest, sending work or material rest to go up to send makings unit to underline for 1 with 362mm, underline length error to be ± 0.

2mm, send move with the hand when makings send makings. Expecting to assure to send is according to undertake point-blank, 2 fixed position were installed to sell on the mould. When figuration, board piece sending the cent on work or material rest 3 paragraphs send a mould figuration. After figuration board piece be like next circumstances: G board piece periphery has corrugate phenomenon generation, special in paragraph with Duan Zhi between have sex place, corrugate more serious; ② board piece the only measure after figuration is 360mm1080mm1mm, the contractive amount that shows afore-mentioned estimation satisfies a requirement basically; Because ③ is put in systole, contractive in each to happen, such paragraph the precision requirement that cannot satisfy blueprint with the moire span between Duan Zhi, when foreword is assembled after, will bring a lot of inconvenience, cause even discard as useless; Board piece moire round part part has local by cut; Board piece decrease small amount <20% ; ⑥ board piece after chromatic flaw detection, for I class qualification; ⑦ mould has more serious wear away and be out of shape. > program of 3 punch technology passes afore-mentioned tests surely really, board piece the main problem that expression of the place when figuration comes out has 4 kinds, basically belong to a mould to design an issue. Through careful analysis and computation, when designing mould and the punch technology that make phasing answer, took following step: Board piece periphery has corrugate appearance, main reason is board piece makings be caused by closes when figuration, because this mould periphery should use the group that approach a limit, when protruding, sunken model is about to add up to a model to work, the circle that approach a limit pins board makings first, can overcome corrugate. Board piece after figuration, paragraph the precision requirement that cannot satisfy blueprint with the moire span between Duan Zhi, main reason is board piece figuration closes to expect and send makings precision be caused by. Board piece figuration closes expect through approaching a limit the circle is overcome basically, the power of the circle that approach a limit is greater (it is about 1.

2MPa) , make its systole is measured for 0, namely board piece figuration belongs to bulging to be out of shape. Send material process by sending so instead is underlined to send makings system automatically on work or material rest, send makings system automatically to include to put roll, school is smooth, send makings 3 measure, if what show. Among them, put roll, school is smooth, send makings, figuration to be undertaken controlling by computer process designing. Because figuration belongs to bulging to be out of shape, so board piece the only measure after dimension of the makings below width is equal to figuration, namely the coiled strip that width is 800mm, be worth change when N so when, board piece length dimension can get assuring. The round horn of 4 moulds structure and working process protruding, sunken model should transfer flowing, r value should keep consistent, the size that R is worth is 2mm, because this mould is in treatment process, finish machining should be used shape knife. Material of protruding, sunken model chooses the class forging of 35CrMoA, the mould pledges through tone after rough machining processing hardness is 280~ 300HB, undertake elimination the ageing treatment of stress before finish machining, the mould is final heat treatment is handled for exterior nitriding, raise the wearability of the mould. If what mould structure shows. The mould shares 4 work (the I in seeing, , I, IV) , every labour action is as follows: ① is versed in an I lie all the time working status; ° is versed in smoke core orgnaization for oil cylinder, when board piece when need figuration is successive and moire, oil cylinder top removes punch, labour be in working status, when board piece be in paragraph with the need between Duan Zhi when figuration platform, oil cylinder falls next punch, labour be in non operating state; Labour I smokes core orgnaization for oil cylinder, when board piece when need figuration is successive and moire, oil cylinder falls next punch 11 Piao are versed in be in non operating state, when board piece be in paragraph with the need between Duan Zhi when figuration platform, the punch since oil cylinder top 11 Piao are versed in an I be in working status; Labour V smokes core orgnaization for oil cylinder, when board piece when needing to be cut off in this position, oil cylinder top removes next knives, labour V is in working status, when board piece when needing to be cut off in this position, oil cylinder falls knife, labour V is in non operating state. Afore-mentioned labour, be versed in an I, be versed in the oil cylinder of a V smokes core orgnaization to all be undertaken controlling by computer process designing. Board piece according to afore-mentioned measure ordinal suppress can optional figuration is successive ripple and platform. This mould passes 5 last words try out, the product achieves blueprint requirement completely, manufacturing efficiency is taller. Mould structure is original, for similar henceforth board piece figuration accumulated experience. CNC Milling CNC Machining