In the first place, we start from the machine frame and welding. When we purchase a machine, we rush to know how precise the machine can achieve and its productivity, but neglect the fundamental basis of a short and long term precision- the entire rigidity and stability of the machine frame. The machine frame, where all processing occurs, undertakes the heavy load and pressure during its service life, requires seamless assembly. A non-strong or poor welding performance(skipped,false,empty,crack,incomplete) frame will lead to the following consequences:
- the deformation of machine frame
- imprecise and uneven workpiece surface
- increasing shaking and noise
- slashed service life, overhauling only after 2 or 3 years.
- break-down, damage to both machine and people
| Structural Defect | Direct Impact on Production & ROI |
|---|---|
| Frame Deformation | Causes long-term structural warping, misaligning critical guide rails. |
| Uneven Contact Surface | Leads to imprecise and uneven workpiece finishing, ruining high-end product surfaces. |
| Mechanical Instability | Drastically increases shaking, vibration, and noise levels during high-speed operations. |
| Premature Wear | Slashes machine service life, forcing major overhauls after just 2 to 3 years and risking sudden breakdowns. |
Now, see what we Armpre do on these aspects.
First of all, premium thick Q235 steel is used to guarantee the heavy-duty and rigidity for the machine frame.
Secondly,we adopt integrated welding frame welding process, reducing the risks of stress accumulation and avoiding any poor welding performance.
Thirdly, The currently widely-used four stress relieving methods are Vibratory Stress Relief(VSR), Thermal Stress Relieving, Ultrasonic Impact Treatment (UIT) and Natural Aging. Vibratory and Thermal Stress Relieving have appreciable defects which may cause secondary stress and the reduction rates are 30-60% and 70-90% respectively. In addition, the cost of Thermal Stress Relieving is extremely high. And we all know that the money manufacturers spend on producing machines would definitely be passed on to customers. The Ultrasonic Impact Treatment is suitable for partial treatment rather than the entire machine. In comparison, though Natural Aging requires a longer time for standing storage, it’s with the best result on frame stress relieving and lowest cost.
| Stress Relieving Method | Stress Reduction Rate | Primary Disadvantage / Limitation | Cost & ROI Impact |
|---|---|---|---|
| Vibratory Stress Relief (VSR) | 30% – 60% | Incomplete reduction; high risk of secondary stress accumulation. | Low initial cost, poor long-term stability. |
| Thermal Stress Relieving | 70% – 90% | Can cause thermal distortion or structural micro-cracks if uncontrolled. | Extremely high cost (passed on to customers). |
| Ultrasonic Impact Treatment (UIT) | Localized | Only suitable for partial treatment (welding seams), not the entire frame. | Moderate cost, limited structural benefit. |
| Natural Aging (Armpre Choice) | Optimal / Complete | Requires a much longer timeframe for standing storage. | Lowest manufacturing cost with the most stable structural result. |
Last but not least, for critical installation surfaces, we adopt gantry milling and grinding to guarantee the components perfect fit to each other.
Obviously, the materials adopted and treatments are not for face only, it’s a fundamental basis for precision and stability in the long run. All we do is to guarantee the frame to be as solid as possible.
Best Regards,
Joanna
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About Joanna
As an industry specialist at ARMPRE, I focus on the technical evolution of industrial sanding and surface finishing. My goal is to bridge the gap between complex automation technology and practical manufacturing needs, helping clients achieve ±0.05mm precision and long-term ROI.