Autodesk Moldflow is improving the application in aging annulus true circularity is out of shape

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The PA66 that increases by fine of Wu Han Bo is producing plastic gear wheel kind when extremely expensive to true circularity requirement product, often can appear ellipse is changed be out of shape, affect the quality of the product thereby. Of the transmission tine link that the article moves tool interior in the light of a typical report be out of shape problem, introduce how Autodesk of have the aid of®The vision with powerful Moldflow® changes analytic function, implementation changes a model to be able to solve the quality problem of the product. Graph material of PA66 of objective of product of 1 tine annulus has very good impact resistance, high strenth and high temperature stability, be in especially add Bo fine to enhance after, mechanical function can rise further, because of this PA66 by wide application in the production at plastic gear. But, the PA66 that increases by fine of Wu Han Bo has each apparent opposite sex on systole, in production so plastic gear is opposite this kind when the product with true circularity extremely high demand, often appear ellipse is changed be out of shape, affect product quality, the plastic gear that works below operating mode of high to be in at the requirement rotate speed especially. Because this true circularity of plastic gear is out of shape problem all the time since it is dynamoelectric tool manufacturer and the serious problem that its supplier needs to face and solve. Of the transmission tine link that the article moves tool interior in the light of a typical report be out of shape problem, autodesk of have the aid of®The vision with powerful Moldflow® changes analytic function, find out bring about product ellipse to change metabolic main reason, experiment and affirm effective solution, implementation changes a model to be able to solve the quality problem of the product. Case describes a plan plan of plan of 2 moulds design shows the transmission tine annulus that goes up for dynamoelectric tool 1 times, product over all dimension is: Ø36.

5mm* 10.

2mm, for tooth form of double deck of inside and outside. Material is: PA66+50%GF, BASF, ultramid A3EG10, the true circularity demand of flute profile of product inside and outside is little at 0.

10mm. This product year demand is 10 million, original mould plan is shown 2 times like the graph to entered glue at 8 o'clock, 1 model two antrum. This product by at crop bigger, to raise yield need makes one model two antrum. Narrate according to manufacturer , this product asks to reach design size, runner amount from increase 8 3 times all the time, but still cannot satisfy dimension requirement. Below the case that took glue at 8 o'clock, the true circularity of the product is jumpy near 0.

2mm, exceed a design to ask nearly 1 times. To find out the main reason that causes problem of product true circularity, we built as identical as actual condition analysis model in the compose in MPI, use shape actually craft parameter undertook imitate. Product metabolic case study: Graph of 3 products be out of shape the result is in Autodesk®In Moldflow® , software of our have the aid of analyses a function formidably, to the fill style of the product, the systole of each area distributes the product cloth, of the caky process of the product and product be out of shape the circumstance is reached bring about metabolic each respects such as main reason did careful analysis, thereby accurate judgement goes out bring about product metabolic main reason. The product is out of shape result of situation product metabolic is shown 3 times like the graph, be out of shape the actual condition of result and product agrees quite. Product standard way gives priority to flow path direction. At the same time Autodesk®Moldflow® still can be found out cause product metabolic cause, and the each element influence to total deflection size, so that at find out bring about product metabolic main reason. Of the product be out of shape case study is shown 4 times like the graph. Nextpage pursues the is out of shape case study is shown 3 times from the graph enlarge of 4 products of 10 times after be out of shape the result can see, the product has apparent ellipse to turn a tide. From the graph of 4 be out of shape can see in case study, although the systole of material is right the size variation impact of the product is the biggest, but bring about product occurrence ellipse to change metabolic the platoon cloth that real reason is Bo fine however. Because this wants to solve the problem of product true circularity, must understand the Bo fine permutation in the product first circumstance. The Bo fine of product interior distributings circumstance Autodesk®Moldflow® can help an user understand the Bo fine permutation in product interior circumstance, judge contractive distributinging difference thereby. From Bo fine distributinging circumstance analyses us to see, nearing the runner area of mainstream line position, the permutation of Bo fine and other area are completely contrary, bo fine appeared transverse arrange, and the Bo fine of other area is upend is arranged almost. We know, the systole that ranges way along Bo fine is small, the systole that perpendicular Bo fine ranges way is big, accordingly, the product appeared in the systole on whole annulus face difference. This brings about product occurrence ellipse to change metabolic namely main reason. And the permutation of Bo fine direction basically is flowed the influence of shearing force, the difference that arranges because of this Bo fine explains to there is apparent lopsided appearance in the fill process of the product, the size that makes stand by mainstream line position thereby appeared whole is transverse flow. Should understand Bo fine to arrange what we need unusual reason to research a product further to fill up mode. Graph the fills up the fill style of mode product is shown 2 times to Wu Rutu gating system of 5 compound flow path, the fill rate of the runner that we think to stand by the mainstream to commonly will be rapidder, because its circuit is short, below coequal condition pressure loss can be compared small, answer because of the area of this this runner place above all cram. But discover through analysing us, the area that this runner is in is however most after ability full, there is serious sluggish to flow in this area namely happen. Analyse a product to fill up the makings peak temperature in the process distributings again, we see, this area expects peak temperature has 10 to spend the left and right sides reduce, more expensive to fine of Wu Han Bo stuff, 10 degrees temperature reduces the performance of going from place to place of material of will apparent effect, make this area velocity of flow is decelerated, become most after fills up finished area. So, this product metabolic is true because fill up the process stops mediumly,the reason is bring about sizing material to appear in fill extreme irregular flow, destroyed the symmetry that Bo fine arranges and uniformity thereby, cause sizing material to be in perpendicular appear at direction of tine annulus axes local contractive difference, most after brings about product occurrence ellipse to change be out of shape. Improve plan to pursue the Bo fine of 6 balances after distributings in the light of this product, want to raise the true circularity of the product, at present with respect to need improvement You Wumo has the flow that unreasonable place causes design plan lopsided problem. Be aimed at the requirement of the characteristic of this product and mould, we put forward to use compound flow path to improve the plan of the fill circumstance of the product. From the graph the imitate result of 5 can see, compound flow path can realize the balance of the product completely to fill up. From the graph the result of 6 can see, fine of Bo of after of balance of going from place to place inside the product arrange become very regular distributing with complete semmetry, this is advantageous the drops a product contractive difference at utmost, raise the true circularity of the product. Be out of shape result (graph 7) also test and verify this, flow through the balance, improve Bo fine to arrange after, the true circularity of the product is jumpy reduced 58% , the dimension of the product satisfied design requirement. Most the improvement that after manufacturer has a pattern according to case of this one party, tried a model to score a success namely. Graph of 7 balances after be out of shape distributinging brief summary sheds dynamic balancing is the surely when undertaking gating system is designed criterion, even if fill up pettily lopsided also meet the permutation of fine of the style that huge affects fill, Bo, cut stress distributing and contractive difference, shedding what dynamic unbalance causes to be out of shape is the problem that industry often encounters, and more expensive to asking at dimension product especially apparent; Order the 3 board models that receive glue to Wu Duo at the same time, by at the mainstream path and runner build received consideration to often can appear of flow lopsided, this also is industry relatively one of scabrous problems. Before the manufacturer often uses the method that adjusts runner volume to improve flow to balance, this case devises plan through using compound flow path, better settlement this one difficult problem. Also can see at the same time, analyse a tool through using advanced model to flow, we are OK the thing data that will need to be judged by experience before is changed, the Bo minute that knows product interior from microcosmic angle arranges a condition, thereby convenient user is opposite huge the assurance of the problem, at the most significant improvement is found inside the shortest time method, shorten the development cycle of the product, reduce development cost. CNC Milling CNC Machining