In the long-term operation of ultra-precision equipment, the failure of many base accuracy does not stem from external wear, but deformation induced by the gradual release of internal stress inside the stone. Even if qualified upon factory inspection, granite plates without sufficient aging treatment will deform slowly under ambient temperature variation and continuous load, causing gradual offset of the reference surface and directly impairing the measurement and motion accuracy of the whole set of equipment. The core of aging-treated mechanized granite base plates lies in adopting systematic aging processes combined with mechanized machining to release internal stone stress in advance and lock the geometric shape of plates, providing a non-deformable base carrier for precision equipment. ZHHIMG Group (ZHHIMG®) embeds aging procedures into the full processing chain of granite plates to fundamentally restrain the risk of post-production deformation.
Natural granite retains residual internal stress after mining and cutting. Simple CNC cutting and lapping can only shape external dimensions but fail to eliminate stress hidden deep inside the material. After machining, stress will release progressively over time, leading to invisible warping and twisting of plates. Such deformation develops slowly and often emerges months or even years after equipment commissioning, making it extremely hard to trace the root cause of faults. Traditional simple processing often skips complete aging steps for fast delivery. Although indicators look good in short-term tests, huge hidden risks remain during long-term service.
Aging treatment is not merely static storage. It is a composite process deeply coordinated with mechanized machining. ZHHIMG Group (ZHHIMG®) applies a staged aging scheme. The first round of aging is carried out after rough cutting of raw stone blanks to release processing stress generated by cutting. A second aging process follows semi-finish milling to eliminate secondary stress induced by cutting. After multiple rounds of stress relief, the plates move to precision grinding, preventing deformation that would ruin high-precision references finished in fine machining. Combined with integrated mechanized processing, plate profiles, hole positions and mounting references are formed in one go without damaging finished high-precision benchmarks due to subsequent stress release.
Material properties set the upper limit of aging effectiveness. If porous marble is selected, even with aging treatment, poor thermal stability will still trigger deformation under temperature fluctuations. ZHHIMG® exclusive black granite features dense structure and high density with superior inherent deformation resistance. Coupled with multi-stage aging treatment, stress can be released more thoroughly. After completing all aging procedures, plates go into constant-temperature workshops for fine machining, ensuring long-term stability of geometric dimensions, flatness and parallelism after production.
For large-size base plates, aging treatment delivers greater value. Large granite bases are widely used in semiconductor equipment, linear motor platforms and laser equipment beds. Such heavy workpieces have more complex stress distribution. Large plates from ordinary machining suffer uneven stress release and obvious local deformation differences. Aging-treated mechanized granite base plates achieve balanced overall stress status. Even for large-size and heavy components, overall deformation is controlled within an extremely small range to meet long continuous working conditions.
Inspection and verification are indispensable after aging. Once the aging cycle of each plate finishes, high-precision metrology instruments collect multi-point dimensional and flatness data. Plates will only proceed to the next fine machining step after stress relief passes verification. All inspection records are preserved and traceable to national metrology benchmarks, ensuring delivered plates are not just temporarily qualified, but products validated by stress stabilization tests. 
In practical application scenarios, aging-stabilized granite base plates fit various dynamically operated precision equipment. Equipment guide rails, lead screws and optical assemblies are mounted on the base. Tiny base deformation will directly alter guide straightness and optical light paths. Stabilized by aging treatment, plates maintain nearly constant geometric form, lowering equipment recalibration frequency and cutting downtime maintenance costs. They are especially suitable for high-end production lines such as semiconductor, precision laser and new energy inspection, where frequent shutdown for calibration is not allowed.
Many manufacturers shorten or even skip aging procedures to cut production cycles, merely using simple static placement. Insufficient stress release shows no problems in the short run but triggers benchmark drift after long service. ZHHIMG Group (ZHHIMG®) regards aging stabilization as an indispensable core procedure for granite base plate production. The company never shortens aging cycles and eliminates potential stress deformation risks in advance through process pre-processing.
In short, the core value of aging-treated mechanized granite base plates is stabilizing material before achieving precision. Mechanized machining forms geometric structures while aging treatment stabilizes the material itself. The combination enables granite base plates to finish stress release before delivery, guaranteeing stable geometric benchmarks throughout the decades-long service life of equipment and supporting consistent operation of ultra-precision machinery.
Post time: Oct-09-2026