7-Step Quality Control Process for Log Saw Blades in Tissue Converting
Introduction
At SHJ KNIFE, we know that quality is the cornerstone of every successful production line. When choosing log saw blades, it's essential for customers to be confident that they are getting a product that will deliver consistent performance, reliability, and precision. That's why we want to take you through our 7-step quality control process. By doing so, we aim to provide full transparency, helping you understand how we ensure every blade meets the highest standards before it reaches you.
Choosing the right blades is more than just a cost decision-it's about maintaining smooth operations and avoiding unnecessary downtime. Even a single faulty blade can impact production and increase costs. By showing you the checks we perform, from dimensional accuracy to dynamic balancing, we want to make sure you feel assured that your log saw blades will deliver top-notch performance every time.
1. Dimensional & Drawing Compliance Check
For ensuring precise dimensions is the foundation of our quality control process. Before any log saw blade leaves our facility, we meticulously compare it against the customer's provided drawings and technical specifications.
We verify key measurements such as the outer and inner diameter, thickness, chamfering details, and tolerance levels. Using high-precision tools like calipers, micrometers, and image measuring systems, we ensure each blade matches the required standards. All measurements are documented to maintain a traceable record of quality.
----Accuracy in Tolerances:
For tight tolerance requirements (e.g., ±0.01mm), we carefully inspect features like chamfers or specific radii, ensuring 100% compliance with the customer's specifications. This attention to detail guarantees that every blade meets the highest standards of performance and precision.
By following this rigorous process, we ensure every log saw blade is precisely built to deliver consistent and reliable performance.
2. Runout & Dynamic Balance Test
----Runout Test: Ensuring Smooth Rotation
After the blade is shaped, we conduct the runout test to ensure it rotates smoothly without any wobbling or vibration. This step is crucial to avoid any instability during operation. Using a dial gauge and specialized platform, we measure both radial and axial runout. If needed, we use digital instruments to further refine the accuracy. We aim to keep the runout value below ≤0.02mm, based on the customer's specific requirements.
----Dynamic Balance Test: Perfecting Blade Balance
Once the runout test is complete, we move on to the dynamic balance check. This is particularly important for high-speed or high-precision blades. Using an automatic dynamic balancing machine, we check the blade's center of gravity and identify any imbalance. If an issue is detected, we adjust the weight accordingly, testing until the blade reaches the desired balance. We use industry-standard balance grades like G2.5 or G6.3 (ISO standards). All data from the test is documented and stored for traceability.
By carefully checking the balance and rotation of each blade, we ensure that it will perform smoothly, minimizing vibrations and maximizing efficiency on your production line.
What is log saw blade?
In the field of tissue converting, the cutting process plays a decisive role in determining final product quality, machine efficiency, and operational stability. Among the key tools enabling this process is thelog saw blade-a specialized circular cutting blade designed to process large paper logs into finished tissue rolls with speed and precision.
This article offers a structured overview of what a log saw blade is, if intertested please click to read more
3. Tooth Edge & Cutting Surface Inspection
----Ensuring Blade Sharpness and Integrity
After the blade is shaped and balanced, we closely inspect the cutting edges to ensure they meet the highest standards of quality. We check for any issues such as chipped edges, burrs, burns, or cracks along the tooth line. These imperfections can affect cutting efficiency and blade performance, so we ensure each blade is sharp, smooth, and free of defects.
If the order specifies specialized edge treatments, such as polished teeth or coatings, we carefully verify that these processes are completed to perfection. For specific requirements, we may use magnification to closely inspect the cutting edges or even conduct hardness-based cutting simulations to ensure the blade performs as expected in real-world conditions.
4. Hardness & Heat Treatment Check
----Ensuring Blade Sharpness and Integrity
To confirm the durability and performance of each blade, we conduct hardness testing using a Rockwell hardness tester. Multiple points on the blade are tested (typically aiming for a hardness range of HRC 58-62) to ensure the material has been properly heat-treated. This ensures that the blade maintains its cutting sharpness and resists wear over time.
We also randomly select samples for metallographic analysis, checking for any signs of under-annealing, overheating, or grain coarsening that could compromise the blade's integrity. This process guarantees the material's consistency and suitability for long-term, high-performance use.
5. Material Certification & Traceability
----Ensuring Blade Sharpness and Integrity
Every batch of raw material we receive comes with a material certification report, verifying the quality of the steel or alloy used for manufacturing the blades. This ensures that we're using the best possible materials to produce blades that meet our high standards.
Each finished blade is assigned a unique batch number or QR code, allowing for complete traceability. This code links the blade back to its raw material, heat treatment process, and quality control checks, ensuring full transparency and accountability for every product we produce
This detailed traceability system provides confidence that each blade meets the required specifications and can be tracked at every step of its journey through production.
6. Visual & Surface Quality Check
----Flawless Appearance and Finish
After the blade has passed all functional tests, we perform a detailed visual inspection to check for any defects, such as scratches, rust, oxidation, or uneven coating. These imperfections can affect both the blade's performance and its overall appearance, so we ensure each one is flawless.
We also inspect the surface cleanliness, making sure it meets our strict standards before packaging. Any residue or oils left over from the production process are thoroughly removed. In some cases, we use a roughness tester to measure the surface smoothness, ensuring it meets the required Ra ≤0.8μm, which is essential for optimal cutting performance.
7. Laser Marking Verification
----Accurate Identification for Full Traceability
Each log saw blade is marked with a laser to provide clear identification. We carefully verify that the model number, batch number, brand logo, and any custom markings are perfectly etched onto the blade. This ensures that every blade can be traced back to its production process.
We also check the clarity, accuracy, and positioning of the markings. There should be no missing or incorrect details. This step guarantees that each blade is properly identified and fully traceable, ensuring consistency and quality from start to finish.
Conclusion
At SHJ KNIFE, we're committed to delivering log saw blades that meet the highest standards. Our detailed quality control process ensures every blade is precisely manufactured and thoroughly tested, from dimensional checks to surface finishes and markings. With this attention to detail, we guarantee reliable performance and long-lasting results for your production line.
If you're looking for high-quality, custom log saw blades, we're here to help. Get in touch with us today to discuss your specific needs and discover how we can support your manufacturing goals. Let's work together to bring the precision and performance your business deserves!
