Medium, small modulus is muti_function the design of numerical control gear-hobbing machine

Lathe bed 7.

Workbench 8.

Electric machinery 9.

Workpiece box 10.

Lathe bed of diagram of appearance of electric machinery machine tool is board solder structure, have the guide with mobile axis, and the shift of Y axis deputy. Interior sets cooling case, whole and cooling system is located in lathe bed interior. The discharge of cooling system is system of 15 main shaft to be comprised by box of circumgyrate slide, pillar, cutter shaft. Circumgyrate slide and lathe bed are linked together, implementation Y axis is mobile. Its upside spends the adjusted range that prop up for pillar circumgyrate horn. Pillar is located in the upside of circumgyrate slide block, can realize the adjustment of P angle, as cutter shaft casing prop up, have Z axis guide. Cutter shaft box passes silk of ball of drive of servo electric machinery prevent, drive the shift that shows Z axis way actually, realize radial feed or implementation to let a knife namely, withdraw the motion such as the knife. Contain inside cutter shaft box main shaft. Main shaft by drive of servo electric machinery, realize a machine tool advocate motion. Cutter shaft box and pillar have Z axis to detect device. A11, . A, workbench and lathe bed slideway close suitably, receive drive of ball guide screw by servo electric machinery, implementation X axis moves. With lathe bed X axis detects device. Upside is mixed of workpiece box top tie-in. Workpiece box installs a part for work location, receive main shaft of workpiece of transmission deputy drive by servo electric machinery, close suitably with B axis, X axis, implement rolling cut. Its are hind pneumatic blocks close unit (special accessory) forehead is workpiece clamping apparatus (design clamp according to workpiece, according to the user the requirement offers calorie of close unit) . Top tie-in can move along X axial, locking, top fixed position. These movements all are moved for the hand. 2.

2 muti_function the motion of treatment allocates B axis to receive hob main shaft, secure on main shaft box have tool carrier structure. Taper of main shaft taper hole is 7: 24.

This tool carrier also can install milling cutter. B axis also can receive boring cutter lever directly. The machine tool can come true according to the need of the user muti_function treatment. Axis of A, B, X regards numerical control linkage as the axis, z axis is used at axis of numerical control feed, p axis is used at adjusting cutting tool angle, axis of U, V is used at the top workpiece that hold clip, can realize four-axle the function of the numerical control gear-hobbing machine of three linkage. Milling cutter of B axis mount, axis of A, X, Z moves with the feed at realizing a machine tool, axis of Y, P, U, V is used at the hand to move adjust, right now machine tool can realize function of milling machine of axis of numerical control spline. Milling cutter of B axis mount or boring cutter, axis of X, Y, Z is used at achieving feed exercise, a axis is used at holding work number control, this machine tool is achievable function of milling machine of numerical control boring. 2.

The rolling cut method with the reachs electric machinery certainly commonly used choice of precision of system of 3 numerical control has radial one axial generating process and diagonally generating process. Diagonally generating process machines the gear that go out, tooth form precision is good, exterior surface roughness is good, cutting tool wears away even, durability is tall, but the numerical control system that needs four-axle linkage at least. Set out from economic angle, we design four-axle the numerical control system of three linkage, one axial generation machines implementation radial. Gear-hobbing machine is through be being exhibited continuously motion processes work, taller to the control precision requirement of each axis speed, so, the controls a system resolution that we design is 0.

001mm, choose communication servo electric machinery to serve as actuating device. The software function of the system of software function numerical control of system of 3 numerical control, main component is management and control two kinds big (detailed sees) . Say from the angle of the user, the editor function enable input of software, delete, revise and search data; Input machine tool and cutting tool parameter; Set coordinate is; Control function realizes speed control, direction control, displacement control; The hand of the machine tool is moved, automatic, time 0 reach restoration to wait adjust; Of machine tool of terminal function processing stop urgently, null of spacing, grating and servo call the police wait for signal. Besides afore-mentioned basic functions, we designed the automatic process designing that gear hobbing machines and contrail technically still to emulate software. This software is to be below Windows operating system, develop with VisualBasic. Part of automatic process designing, after the workpiece parameter that by the user the input needs, cutting tool parameter, cutting parameter, can make the G code file that machines involute cylinder gear, can show, the content of modification file. Emulation part is emulated through theory, 4 automatic process designing and contrail emulate course of clench the teeth the design of software we are with gear of cylinder of rolling cut inclined tine exemple, show automatic process designing and the implementation of emulation software. The exhibits motion and hob feed movement that carries hob and tine semifinished product processes work numerical control gear-hobbing machine. Hob has turned, tine base must have turned N/z turns. Helical gear has certain lead (T) when should aging base turns, the add roll between hob and tine base turns for Fx/T. Accordingly, when the corkscrewed yarn way of hob and gear is same, turn when hob when Z/n turns, tine base should have turned 1+fx/T turns. When the corkscrewed yarn way of hob and gear is opposite, turn when hob when Z/n turns, tine base should have turned 1 one Fx/T turns. When gear come back to with hob come back to identical when, the installation part of hob is small, hob cuts time and tooth negative charge small, cutting tool life is long, machine tool vibration is little. So, we chose to be the same as directional rolling cut. The cutting dosage of gear hobbing basically points to feed of cutting speed, axial and cutting deepness. When the modulus of gear is less than 3mm, general one knife goes. To satisfy an user to be opposite the treatment of special gear material and special gear precision asks, we also wove twice program taking a knife. Walk along knife deepness to be equal to for the first time at this moment 0.

The total mental allowance of 65 times, walk along knife deepness the 2nd times to be equal to 0.

The total mental allowance of 35 times (gear-hobbing machine of Liebherr numerical control operates a manual) . Cutting speed and axial feed matter to the precision of gear, surface roughness and treatment efficiency directly, also affecting the stiffness of system of the service life of hob and machine tool, workpiece, cutting tool, number of the modulus of workpiece, tine, material and precision ask to concern, the case is more complex. So, we get on manual mentioned a few costs, provide an user with the form of the database, and use actual cutting time (Tm) compare with expectation cutting time, will examine roughly cutting dosage. L2=3m.

Tan ((32+y.

) one A mark is emulated with code the umbriferous line of copy plum is open Iaf and academic involute to compare gradually, judgement cutting affection GHouse.

The feed of F workpiece (Mm/r) number of head of Z ― hob; The heart goes to the distance of hob end panel in K rolling cut; Helix of hob of Y of helix angle of heart workpiece reference circle rises horny A to adjust parameter, it is normally 35 (Mm) the G code file that part of automatic process designing makes, can check code through displaying program function, still can emulate a function to undertake checking through orbit. The part is emulated in orbit, we chose two plane, one is XOZ coordinate plane (see) , another normal plane that is workpiece tooth profile (see) . Before hob and workpiece are contacted, undertake emulation can showing the opposite movement of cutting tool and workpiece clearly with XOZ coordinate plane. In cutting treatment process, inside the normal plane of workpiece tooth profile, the partial tooth profile of gear besides. Inside this plane, we still used actual cutting base pitch and photograph of computational base pitch to compare, judge cutting situation. Academic copy is a basis really equation of involute polar coordinates: Should be machined after the parameter of gear is foregone, the parameter such as round radius of top of radius of its basic circle, tine root round radius, tine, base pitch comes down certainly, the academic involute of form of tine teeth of a cogwheel can be drawn. Copy of contrail of clench the teeth is the basis extends law principle really, cutting contrail is shown inside the normal plane of tooth profile. If the athletic contrail of some bit on cutting blade accords with a requirement,hob is a whole, the motion of hob accords with a requirement. Gear hobbing treatment has according to gear and principle of rack clench the teeth. Pass an analysis to know, each bits of the most effective cutting contrail on hob cutting blade moves point-blank along hob axes. It is so inside the normal plane of workpiece tooth profile, we chose hob ably to go up as tangent as basic circle advocate the athletic contrail of on cutting blade a bit, come test and verify is whole the motion of hob, move the whirligig translate into of hob point-blank, simplify thereby emulation process. Be aimed at the demand of home market, the article offers economy of a kind of medium, small modulus model muti_function numerical control gear-hobbing machine, right system of the mechanical layout of gear-hobbing machine, motion allocation, numerical control and electric machinery choice undertake treatise. Via proving with all possible means, have feasibility. Automatic process designing and emulation software augment the function of numerical control system, abounded numerical control machine tool to emulate operation software system. This software interface is friendly, beautiful, code safety is stable, have very strong versatility. Use result is favorable. CNC Milling CNC Machining