Kako riješiti problem obrade deformacije preciznog okruglog čeličnog traka

Before processing, the steel is isothermally annealed (such as 860℃austenitization + 650℃isothermal transformation) to refine the pearlite grains to less than 10μm, and the residual stress can be reduced to less than 80MPa, reducing the deformation caused by the initial stress. High carbon steel (such as T10A) adopts sferoidiranje žarenja kako bi se karbidi učinili sferičnim i smanjili otpor na plastičnu deformaciju tijekom rezanja . Nakon grube obrade, žarište ublažavanja stresa (550 stupnjeva × 3H) raspoređeno je kako bi se oslobađalo rezanje napona . doplata za dorade {{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{. koncentracija .

When cutting, carbide tools (such as YW1 brand) with a rake angle of 10°-15° and a main deflection angle of 75° are used to reduce radial cutting force by more than 30%; BTA drill + 20MPa high-pressure cooling is used for deep hole processing to reduce drill bit deflection. The slender shaft (length-to-diameter ratio>15) Koristi središnji okvir + okvir sljedbenika za zajedničku potporu, s postavljenim točkama za podršku svaki 150-200 mm, a radijalno otpuštanje se kontrolira unutar 0 . 005mm; Dijelovi tankih zidova koriste tekuće plastične učvršćenja, ravnomjerno pod tlakom (tlak manji ili jednak 5MPa), a deformacija stezanja može biti manja od 0,002 mm.

Vodič za strojne alatne tračnice nadograđuju se na hidrostatske ležajeve (debljina filma ulja 20-30 µm), a prednaprezanje vretena povećava dinamičku krutost na više od 20kn/µm za suzbijanje vibracija (amplituda<5μm). Precision machining needs to be carried out in a constant temperature environment of 20±0.5℃. The lead screw is equipped with a grating scale closed-loop feedback (resolution 1nm), and the thermal deformation error is ≤0.001mm/m. After machining, the size can be further stabilized by low-temperature aging (120℃×24h) or shot peening (forming a 0.2-0.3mm compressive stress layer) to ensure that the deformation is controlled within the tolerance of 1/3 (such as φ50h6 shaft diameter deformation ≤0.003mm).