Have efficient treatment to bevel gear of helix of big modulus high accuracy

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Use general machining center processes 5 rods the helix bevel gear of big modulus high accuracy, solved an user cannot the problem that oneself have machine this kind of gear and can rely on an entrance only. The snail umbrella that machines big modulus, hard tooth flank, wide tooth flank and high accuracy is to perplex the issue with industrial gear old industry all the time. Did not appear in general machining center previously, the method that machines only of this kind of gear uses special snail umbrella to machine a machine tool namely, and because this is planted,the gear of big modulus high accuracy contains higher profit, accordingly manufacturer of special machine tool does not sell the treatment machine tool of this kind of gear external, is to sell gear only, this makes user cannot oneself make machine this kind of gear and can rely on an entrance only. As mechanical industry more and more to heavy-duty change development, the production bottleneck that snail bevel gear brings high accuracy of treatment big modulus is more and more outstanding also, force people to must consider new-style treatment method, then, use general machining center processes 5 rods this kind of method of the snail umbrella of big modulus high accuracy with respect to emerge as the times require. On the fair of Beijing international machine tool that 6~11 day held in April 2009, of group of Er of rice of strange summer of Swiss GF A exhibit a stage to went up to appear a pair of helix bevel gear that with Mikelang general machining center processes 5 rods, the attention that drew numerous gear user (graph 1) . This is gear of hard tooth flank to gear, area of the contact after rolling check is perfect, in 21.

Below the linear velocity of 5m/s, the noise of gear under 67db, explain gear has character of good clench the teeth and precision. The gear that graph 1 CIMT2009 exhibits, what right graph reveals is gear the region of engagement on machine rolling check is well-known, the work that processes high accuracy on machining center needs a series of relevant technology, among them the most crucial, most of core is machine tool production technology and CAM software technology, it is only below the support of the CAM software of the machine tool of high accuracy and high quality, ability is efficient the spare parts of ground treatment high accuracy. All the time since, group of Er of rice of strange summer of Swiss GF A is international on in order to produce the Mikelang of high accuracy tall tigidity 5 axes machine tool and celebrated machine tool produces business, the Mi Kelang HPM1850U that its produce machining center used 5 rods the technology with advanced course of study of a lot of machine tool. This kind of 5 axes machining center swings in its axis (B axis) reach rotor (C axis) used direct drive technology, among them of B axis swing speed can achieve 20r/min; C axis achieves 30r/min. Not only such, used hydraulic pressure clamp on B/C axis, make B/C axis can obtain huge tigidity in machining a process, in this treatment in gear especially important. Additional, because the handling time of gear is long, the hot stability of the machine tool is more crucial, machine tool of Mi Kelang HPM1850U deployed APS (advanced technology controls a system) reach ITC (system of intelligent vulcanize countervail) , make this kind of machine tool had admirable thermal stability, can ensure thereby the treatment precision of gear, make its are in general 5 axes machine bevel gear of helix of high accuracy big modulus to become a possibility on machining center. The collaboration of this project square, university of developer Beijing traffic Professor Wang Xiaochun of software of snail umbrella CAM goes up for international one of gear experts of the most negative great reputation, its solved what what Litivn of authority of international gear group says or state with certainty to cannot be calculated accurately namely 1994 tooth flank 3 rank the problem of parameter, the English monograph that its publish has made gear group make classically, have very tall attainment on CAM and CNC. Software of CAM of this snail umbrella includes the following characteristics: 1.

The flexibility that high strenth and the gear deputy design of tall machinability arrange as a result of contrail of the cutting tool on machining center, tooth trace curvature need not accept the restriction of series of bit body measure, will choose by flexural strength of optimal teeth of a cogwheel. Same, left, right the yield of two side tooth flank the relative position between shape face also need not suffer on bit body inside, outside the tie of two side tooth relative to the position, can pass proper self-correcting, the tine that achieves big, truckle supports (graph 2) it is with bottom land width on complete tine bizygomatic breadth agree basically, can use radius of very big tine root round horn consequently, the gear that treatment gives has thick tine tip, the cutting tool that allows to use bigger diameter undertakes the gear cutting of efficient, high accuracy. Graph 2 wait for wide tine to support with a pair of 31:32, modulus 36, the snail umbrella of 270 is tine bizygomatic breadth exemple, if use traditional Gleason or GB design method, the bottom land width of truckle has 12mm only, tine is deep exceed 70mm, treatment is very difficult, and radius of tine root round horn also can accomplish 6mm left and right sides only. And use new design concept, the bottom land width of big, truckle achieves 20mm above, the biggest tine is deep reduce 66mm, improved machinability greatly, what still avoided tine top is contractive, at the same time radius of tine root round horn can achieve 10mm above (graph 3) . Graph the 3 perfect a tooth-like part of anything that give in the treatment on 5 axes machine tool module of design of root round horn still included to wait for tall tine and small contractive tine two kinds of tooth form, the user can be chosen neatly according to need. Software package still supports the snail umbrella treatment that tape spool extends, so that use oriented bearing,will reduce bulk, improvement bearing and gear deputy working state. 2.

Can assemble a gender goodly to be able to satisfy law of edge truckle axes to ask to what assemble, can simplify in a lot of circumstances assemble craft, rise assemble efficiency. Because tooth trace curvature is evener, even if the gear that big drive compares deputy, direction of edge truckle axes assembles the phenomenon that also won't produce calorie of sluggish commonly. 3.

Beardless canzonet rectifies umbrella of production snail of area of perfect tooth flank contact and noise control, the tooth flank that can machine an ideal contacts an area, basically achieve move soundlessly. This software package has the functional module that optimizes tooth flank automatically to contact an area, beardless anybody is versed in interpose, in several seconds in, contact tooth flank automatically the area to adjust good place and figure, the gear that assures a treatment deputy basically achieve move soundlessly. Because this uses this software to include made snail bevel gear deputy need not need canzonet to rectify, do not need to roll check, after treatment ends, can deliver goods directly or assemble. 4.

The machine tool position that supports whole set has perfect postposition to handle a function, support all machine tool position. Embedded in each CAM module 5 axes mix supportive whole set the postposition of layout of 5 linkage machine tool processes 6 rods module, the user is OK very the machine tool type that uses through man-machine interface definition conveniently, software will generate the G code that suits this machine tool automatically. 5.

The function is powerful, complete have design, intensity to analyse (CAE) , osculatory area is optimized, contact divisional analyse (TCA) , support different and phyletic cutting tool (establish milling cutter and efficient 3 blade milling cutter) treatment method (CAM) , , the function is powerful, very complete. 6.

Goofy model this software Baoyi learns software structure with, be goofy model software package. Besides parameter of the basiccest a few gear need operation personnel is offerred besides, the others parameter perhaps is passed by the system optimize or expert library decides automatically, or give out by the system proposal value, by user circle hind input. Because this wants to be opposite only,the dosage of cutting tool cutting on machining center has the operation personnel of a few foundations, a long time OK and preliminary control, two days can be applied adroitly. 7.

This software does not need the gear that ensures treatment gives high accuracy him user builds 3D hypostatic model, software generates a knife automatically orbit data dot, because this avoided the precision loss that causes in CAD/CAM model transition, it is thereby below the situation with the hardware same situation such as machine tool and cutting tool, can machine piece more the gear of high accuracy. CNC Milling CNC Machining