Deformation and Flattening of Perforated Sheets
Source:www.cn-psp.cnAuthor:河北森驰公司 Last updated:2024-11-27 10:11:47 Browse:
During the production of perforated sheets, continuous punching is carried out using a CNC punching machine, which often results in deformation and curling of the metal sheets. There are several reasons for this:
Deformation During the Punching Process
The production of perforated sheets involves the punching die applying pressure from above. This pressure causes slight deformation of the metal sheet. Additionally, a large amount of heat is generated in the punching area, and the resulting thermal expansion and contraction contribute to further deformation. Therefore, the smaller the hole spacing and the thinner the sheet, the more significant the deformation.
perforated sheet
Impact of Steel Hardness on Deformation
The hardness of the material used for producing perforated sheets also affects the extent of deformation. The harder the metal sheet, the greater the deformation during punching. This is unavoidable, but technical measures can be taken to reduce the deformation.
Technical Measures to Reduce Deformation
To minimize deformation, the following measures can be taken:
perforated sheet
Use of Sharp Punches: Sharp punches reduce friction and compression, thus lowering the risk of deformation.
Regular Inspection of Punch Wear: Worn-out punches increase pressure, which can lead to more deformation, so regular inspection and replacement are necessary.
Periodic Adjustment of Die Gaps: Uneven die gaps can lead to irregular deformation, so it’s important to regularly check and adjust the gaps.
Flattening Methods for Perforated Sheets
After deformation, perforated sheets can be flattened using various equipment. Common flattening methods include:
Multi-Roller Leveling Machines: This is a common method for leveling perforated sheets. After adjusting the machine settings, the sheets are passed through the rollers, which helps reduce deformation significantly. For sheets requiring higher flatness, multiple passes through the machine can further improve the flatness.
Hydraulic Leveling Machines: For very thin sheets or those with small hole spacing, a hydraulic leveling machine is a more precise option. It can flatten the perforated sheet to almost its pre-punched state, achieving very high flatness.
By using these methods, the deformation of perforated sheets can be effectively reduced, ensuring better flatness and stability for the final product.
perforated sheet
