MD3595F2

MD3595F2 - Process and device for electroerosion machining of gearwheels (variants)

Info

Publication number: MD3595F2
Application number: MDA20050068A
Authority: MD
Inventors: Ion Bostan; Valeriu DULGHERU; Ion Dicusara
Original assignee: Universitatea Tehnica A Moldovei
Priority date: 2005-03-04
Filing date: 2005-03-04
Publication date: 2008-05-31
Also published as: MD3595G2; MD20050068A

Abstract

Inventia se refera la constructia de masini, si anume la prelucrarea prin electroeroziune a rotilordintate. Procedeul de prelucrare prin electroeroziune a rotilor dintate, conform primei variante, consta in aceea ca coroana rotii dintate se formeaza printr-o serie de deplasari consecutive coordonate ale sculei-electrod filiforme, obtinute printr-un program computerizat de dirijare de la interpolatoare liniare. Noutatea inventiei consta in aceeaca rotii dintate i se comunica o miscare sfero-spatiala de precesie in jurul centrului de precesie „O” si o miscare de rotatie. Totodata, sculei-electrod filiforme i se comunica prin intermediul interpolatoarelor astfel de miscari coordonate (Z2, Y2) si (Z3, Y3), care asigura trecerea generatoarei conului format la uzarea sculei-electrod filiformein planul normal la profilul dintelui prin centrul de precesie „O”. Procedeul, conform variantei a doua, consta in aceea ca rotii dintate i se comunica o miscare de rotatie in jurul axei sale. Totodata, sculei-electrod filiforme i se comunica prin intermediul interpolatoarelor miscari coordonate (Z2, Y2) si (Z3, Y3), care-i asigura unui punct „F” de pe generatoarea conului format la uzarea sculei-electrod filiforme in planul normal la profilul dintelui o miscare sfero-spatiala de precesie in jurul centrului de precesie „O”. Dispozitivul de prelucrare prin electroeroziune a rotilor dintate, conform primei variante, include o carcasa, pe care sunt montate o scula (3), un mecanism de rotire a rotii prelucrate (2), instalat cu posibilitatea deplasarii sfero-spatiale in jurul centrului de precesie „O”, si un sistem de comanda computerizat. Noutatea consta in aceea ca scula (3) este executatain forma de electrod filiform. Carcasa este dotata cu doua interpolatoare, amplasate in zone diametral opuse fata de centrul de precesie „O”, totodata interpolatoarele includ cate doua servomotoare (6) cu axele reciproc perpendiculare, aflate in planurile Y2O2X2 si, respectiv, Y3O3X3 si legate cinematic prin ghidaje (4, 5) cu scula-electrod (3) filiforma. In dispozitiv, conform variantei a doua, interpolatoarele includ cate un element turnant, pe care sunt fixate doua servomotoare, unul dintre care este amplasat cu axa de rotatie verticala, iar al doilea cu axa de rotatie orizontala, si este legat cinematic cu o sanie montata pe elementul turnant. In sanii este fixata cinematic scula-electrod filiforma.The invention relates to the construction of machines, namely to the processing by means of electro-erosion of rotilordintended. The process of electro-erosion processing of the gear wheels, according to the first variant, consists in that the gear wheel crown is formed by a series of consecutive coordinated trips of the tool-filiform electrode, obtained by a computerized program of steering from linear interpolators. The novelty of the invention consists in the same toothed wheel and it is communicated a sphero-spatial movement of precession around the precession center "O" and a rotation movement. At the same time, the filiform electrode tool communicates through the interpolators such coordinated movements (Z2, Y2) and (Z3, Y3), which ensures the passage of the cone generator formed when using the filiform electrode tool the normal plane to the tooth profile through the precession center " A". The method, according to the second variant, consists in that the gear wheels are communicated a rotation motion around its axis. At the same time, the filiform electrode tool communicates to it through the interpolators coordinated movements (Z2, Y2) and (Z3, Y3), which provides them with an "F" point on the cone generator formed when the filiform electrode tool is used in the normal plane at tooth profile a spherical-precession movement around the "O" precession center. The device for electro-erosion processing of the gear wheels, according to the first variant, includes a housing, on which a tool (3) is mounted, a mechanism for rotating the processed wheel (2), installed with the possibility of sphero-spatial displacement around the precession center. "O", and a computerized control system. The novelty is that the tool (3) is executed in the form of a filiform electrode. The housing is equipped with two interpolators, located in areas diametrically opposite to the precession center "O", at the same time the interpolators include two servomotors (6) with reciprocally perpendicular axes, located in the planes Y2O2X2 and, respectively, Y3O3X3 and kinematically linked by guides ( 4, 5) with tool-electrode (3) filiform. In the device, according to the second variant, the interpolators include a rotating element, on which two actuators are fixed, one of which is located with the vertical axis of rotation, and the second with the horizontal axis of rotation, and is kinematically linked with a sled mounted on the rotating element. In the breasts is fixed kinematically the tool-electrode filiform.