How does Manhart (Guangdong) CNC Machine Tool Co., Ltd. eliminate heat treatment deformation of molds through post calibration and correction?

During the heat treatment process of the mold, even if preventive measures are taken, deformation may still occur. Post processing correction and correction is a crucial step to eliminate or reduce these heat treatment deformations. The following are some commonly used post correction and correction methods:
1. * * Mechanical calibration * *:
-Cold pressing correction: suitable for molds with lower hardness, using mechanical pressure to restore the deformed parts to their original shape.
-Hot pressing correction: For molds with higher hardness, hot pressing correction can be performed at lower temperatures to restore shape by utilizing the plastic deformation of the material.
-* * Hammer correction * *: Use a hand hammer or a motorized hammer to gently tap the deformed area to induce microplastic deformation of the material and restore its shape.
2. * * Hot straightening * *:
-Hot pressing straightening method: Local or overall heating is applied to the deformed area, and then pressure is applied to the convex point to cause plastic deformation of the material in the hot state and restore its original shape.
-* * Local drying thermal calibration method * *: Heat the deformed part with flame to expand the material locally, then quickly cool it, and use the thermal expansion and contraction characteristics of the material for calibration.
-Hot spot correction method: Local heating is applied to the deformed area to cause slight deformation, followed by rapid cooling. This process is repeated until the deformation is eliminated.
3. * * Cold calibration * *:
-Cold positive impact straightening method: Use a hand hammer or a motorized hammer to apply impact force to the deformed area, causing plastic deformation and restoring the original shape.
-Cold back impact straightening method: Apply an impact force on the opposite side of the deformed part to produce reverse plastic deformation, thereby correcting the deformation.
4. * * Comprehensive correction * *:
-Combining mechanical calibration and hot calibration, first perform hot calibration on the mold, and then perform mechanical calibration to achieve better results.
5. * * Other methods * *:
-Laser correction: Using a laser beam to rapidly heat and cool the surface of the mold, achieving adjustments for small deformations.
-Chemical treatment: Chemical treatment is applied to the surface of a material to change its local tissue structure and stress state, reducing deformation.
When performing post calibration and correction, the following points should be noted:
-* * Correction force * *: The correction force should be moderate to avoid excessive correction causing new deformation.
-* * Correction temperature * *: During hot state correction, the heating temperature should be controlled to avoid being too high or too low, which may affect the correction effect.
-* * Correction sequence * *: For complex deformations, it is necessary to plan the correction sequence step by step to avoid incomplete correction at once.
-* * Safe operation * *: When performing mechanical calibration and hot straightening, it is necessary to follow the safety operating procedures to ensure the safety of personnel and equipment.
In summary, post correction and correction is a comprehensive task that requires selecting appropriate correction methods based on the actual situation of the mold to achieve the best correction effect.