Shearing is a process used to cut sheet metal and similar workpieces. In this process, shear blades made of hard steel are often used. Some workpieces may become difficult to cut after being sheared. Therefore, shear blades must be made from materials that can cope with the characteristics of different sheet metals and workpieces. To remain cost-effective and functional for manufacturers, shear blades must also have the ability to resist tearing and wear over time.
Table of contents
1. Why do you need to maintain sheet metal shear blades?
2. How to clean sheet metal shear blades?
3. How to perform sheet metal shear blade grinding?
4. How to replace the sheet metal shear blade?
5. Follow sheet metal shear machine specifications and regular evaluation
6. Set the correct sheet metal shear blade gap and maintain machine components
1. Why do you need to maintain sheet metal shear blades?
Sheet metal shear blades are consumable and require regular maintenance, including cleaning, grinding and blade replacement.
2. How to clean sheet metal shear blades?
Cleaning work must be carried out regularly to ensure that the blade surface is bright and rust-free. At the same time, applying anti-rust grease can extend the life of the blade. After cleaning, sharpening is required to restore the sharpness of the blade.
3. How to perform sheet metal shear blade grinding?
Through grinding and maintenance, the blades of hydraulic shears can maintain their basic performance well. At the same time, workpiece cutting will be more powerful to ensure the smooth progress of the process.
- Start with the flat surface of the blade, making sure it is shiny and free of rust.
- Then grind both sides and note the parallelism.
- If you find that the grinding surface is tilted, you can adjust the grinding pressure. Also, apply appropriate force to the thicker side.
- Take care to check the accuracy and calibration of the grinding blade.
- High temperatures can affect the accuracy of the blade. When sharpening the blade, the temperature of the steel blade should not exceed 50 degrees Celsius. If the temperature is too high, allow it to cool for a while before continuing.
- Finally, after grinding, apply a layer of anti-rust fluid to prevent rust.
Although we can sharpen the blade so that it can continue to be used after it becomes dull. But shear blades can usually only be sharpened 1-3 times. When grinding more than 5 times, the sheet metal shearing blade must be replaced.
4. How to replace the sheet metal shear blade?
Start the machine, adjust the shear angle, and adjust the blade gap to the maximum value.
After waiting for the hydraulic shear to run up and down for several rounds, turn off the machine and disconnect the main power supply.
Remove the protective fence, compression cylinder (pay attention to hydraulic oil spillage) and tool holder cover of the hydraulic shearing machine.
First remove the blade:
- Loosen all lower blade mounting screws and use a rectangular piece of wood to firmly press the lower blade against the back of the machine to prevent the lower blade from tilting backward or slipping off.
- Remove the screw on the side of the lower blade and pull the lower blade out of the side of the hydraulic shear.
Then remove the upper blade:
- Loosen all upper blade mounting screws.
- Insert two suitable rectangular pieces of wood between the work surface and the upper blade.
- Tighten the upper blade firmly, remove the screw on the upper blade, and then pull the upper blade from the side of the hydraulic shear while slowly loosening the wood block.
- After removing the blade, clean it piece by piece. All four sides of the blade can be used, choose the best side for installation.
- Check horizontal and vertical straightness.
5. Follow sheet metal shear machine specifications and regular evaluation
One tip you can do to ensure the longevity of your shear blades is to follow your machine's recommended specifications. The machine paired with the shear blade has specifications and parameters that the operator must strictly adhere to. Shear blades work well if they have the right thickness and width. As for the shear blades, they can keep running if the machine's load and lubrication recommendations are all followed.
6. Set the correct sheet metal shear blade gap and maintain machine components
Shear blades can perform optimally only if the machine is maintained regularly. Some machine components that must be maintained regularly include air systems, lubrication systems, machine clutches, brakes, and balancing cylinders. Their maintenance should include cleaning, repair and replacement. If the shear blade has sustained some damage, it should also be repaired.
7.Conclusion
If you want to buy new shear blades for your machine, you can call +86-189-5208-7956. As a professional shearing machine manufacturer, KRRASS has a complete after-sales service and technical team. For the convenience of users, we can provide users with maximum technical support. You can also invite us to tune up and repair your metal shears or blades. Alternatively, we can guide users in grinding and replacing blades. KRRASS also provides customers with customized sheet metal shearing machine services. If you have any needs, please contact us.
