The tigidity of bedplate of job of high speed punching machine studies

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The ply of bedplate of job of high speed punching machine needs to ask to undertake designing according to the client. To satisfy the requirement of different tigidity, the working bedplate that the article applies the plug-in unit COSMOSWorks in Solidworks software to pledge to different ply, different capable person undertook mode is analysed, beg the stiffness of working bedplate instead by natural frequency and quality again, find out stiffness to reach the rule that ply changes character along with material. Reached by the analysis integrated consideration tigidity, decrease brace up gender and design of socioeconomic job bedplate and select material plan, this plan can satisfy the requirement of different tigidity. Bedplate of 1 foreword job serves as the important part of compressor, next connecting arrive since airframe, on the action that joins a mould. The ply of working bedplate affects the height that fit a pattern directly, to common compressor opening type, the height that fit a pattern has unified design level: JB 1395-74 of one machine ministerial standard, the ply dimension of working bedplate agrees basically. As the manufacturer that in last few years home produces core of E ／ I, electric machinery to decide rotor ceaseless grow in quantity, the demand to high speed compressor increasingly grow in quantity, domestic v equipment produces manufacturer to also develop to domain of high speed compressor gradually, technical level and market are had rate is constant also rise. Because home opens compressor of type high speed to still do not have uniform parameter standard, the mould height measure that covers suitably to it also agrees very much. This is brought about often change the ply that moves working bedplate when supplying equipment to the user, the height fitting a pattern that revises the relevant measure of airframe to differ in order to satisfy even asks. When bedplate ply is reduced, adopt milling to make the planar method below bedplate commonly, but reduce when ply too much when, general need changes material delivers makings treatment afresh character. After working bedplate ply is reduced, the stiffness of oneself can be reduced, be out of shape in the meeting when high speed punch aggravate damages even. The article uses working bedplate with machine tool of VH45 of limited company of group of factory of Xuzhou v machine tool (graph 1) is exemple, undertook an analysis with respect to the relation between bedplate ply and bedplate stiffness. 2 computation formula is calculated directly the stiffness of the spare parts is more complex, the computation of plug-in unit COSMOSworks in can using Solidworks software gives the natural frequency of the spare parts, repass type (1) undertakes changing receiving form (2) , can calculate the stiffness K that gives a part. 3 COSMOSWorks analysis is convenient for the purpose of, take the capable person of working bedplate the capable person that takes oneself for software to pledge character: Casting pig, alloy steel, cast carbolic steel, common carbon steel, if the mechanical function of each material expresses 1 to show have the plane below working bedplate the part is secured (airframe falls 450 Mm*305mm of makings Kong Wei, do not add tie) , according to dimension of plane of slide block bottom, the chief broad measure of set mould is 360mm*300mm, bring to bear on in afore-mentioned area the load of 450 KN. The span of ply of set job bedplate is 70 ～ 130 Mm, removed 5 Mm does an analysis, take first-order natural frequency, if computational result expresses 2 to show. 4 results analysis will be expressed 2 in first-order natural frequency and stiffness follow the working bedplate that 4 kinds of arranges data make the relation that working bedplate ply changes uses a figure respectively 2 with the graph 3 will express, join two graphs and list 2 can see: (1) as working bedplate ply increase, to 4 kinds of afore-mentioned material, after first-order frequency increases to be worth to fixed number first slow reduce; (2) as working bedplate ply increase, to 4 kinds of afore-mentioned material, the stiffness of working bedplate increases from beginning to end and increasing scope is reduced gradually; (When 3) ply is identical, mix by the natural frequency of the alloy steel, job bedplate that casts make it of carbolic steel, common carbon steel stiffness difference is not big; (Makings of 4) workbench plank is different, first-order frequency is different, the stretch model amount of material is larger, first-order frequency is bigger also; (The material that model of 5) identical flexibility measures, first-order frequency increases as the accretion of tensile strength; (The 6) job to same way getting power and identical configuration bedplate, first-order frequency appears the ply of correspondence of the place when great value is almost changeless, the ply of this bedplate correspondence is 100 Mm; (7) by type (2) can see, the main factor that affects stiffness is natural frequency and quality. Working bedplate ply begins to increase from 70 Mm, when first-order frequency increases peak value, can cipher out frequency increased about 11 ％ , quality increased nearly 60 ％ at 70mm ply relatively, can see from this, in this one change, quality had very big effect to stiffness. When the numerical value from frequency peak value increases bedplate ply to 130mm, first-order frequency dropped about 2 ％ , quality photograph is controlled to 25 ％ increasing when 110 Mm ply. Bedplate stiffness is slow increase, but amplitude is being decreased gradually small. 5 conclusion can see from above analysis, to the working bedplate of specific structure, its are first-order natural frequency exists when working bedplate ply produces change great value, first-order natural frequency is great the ply limits that is worth correspondence agrees almost character to 4 kinds of afore-mentioned material. Decrease as a result of what considered data brace up function, the workbench plank of compressor of high speed opening type chooses casting pig commonly character; When should install modular height to suit and needing to reduce working bedplate thickness greatly, can change material character for common carbon steel, be like Q235A, the stiffness of bedplate can get very big improvement, also shortened at the same time treatment is periodic; When reduce the height that fit a pattern when need and increasing working bedplate ply greatly, appear easily to casting bedplate cast blemish, the influence is used, can add between working bedplate and airframe transfer bolster plate. CNC Milling CNC Machining