What problems will you encounter when welding the saw blade? Is there any solution?
- Author:Dora Zhang
- Source:www.boreway.com
- Release on:2020-11-04
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The product quality problems that often occur in the welding process of sawing tools include: the welding strength does not meet the requirements, the welding seam at the welding place, the end face jumps too much, the symmetry is not good, the matrix deformation, etc.saw blade flash butt welding machine suppliers
For laser welding saw blades, insufficient welding strength is also caused by incorrect welding process settings. If the welding power is too low and the welding speed is too fast, the penetration depth of the joint between the cutter head and the matrix is too shallow, the joint area is too small, and the bonding strength is insufficient.
Therefore, the solution to this problem is mainly through correct setting of welding process parameters, and timely adjustment when problems are found, thereby reducing the rejection rate.
3. Matrix deformation
For high-frequency welding, matrix deformation is mainly because the current is too high and the welding temperature is too high, which makes the matrix soft and deformed; for laser welding, it is mainly because the laser is biased to the matrix too much, which causes the matrix to generate thermal stress concentration and soften deformation.
To solve this problem, produce a substrate with a good material as much as possible to ensure that the thermal softening point of the substrate used is high; at the same time, the welding process must be controlled to ensure that the welding temperature is not too high; if the substrate has been softened and deformed, it should be allowed to Natural cooling can generally be restored. Do not use your feet to make it flat, otherwise the matrix will be plastically deformed and cannot be restored.
For laser welding saw blades, first ensure that the surface flatness of the substrate fixture meets the requirements. After the cutter head is clamped, the distance between the side of each cutter head and the surface of the substrate can be measured with a vernier caliper to see if it is equal to the thickness of the cutter head minus the thickness of the substrate If the difference is large, it can be adjusted before welding to prevent waste of cutter head.
The product quality problems that often occur in the welding process of sawing tools include: the welding strength does not meet the requirements, the welding seam at the welding place, the end face jumps too much, the symmetry is not good, the matrix deformation, etc.saw blade flash butt welding machine suppliers
350mm-1400mm saw blade flash butt welding machine
1. End face bounce and neutrality do not meet the requirements
The end face of the saw blade bounces and the neutrality does not meet the requirements, which will cause the saw blade to produce vibration and deflection during use, which will affect the normal performance of the saw blade. Therefore, when high-frequency welding, not only ensure the neutrality of the blade, but also weld After a cutter head, compare it with the previous cutter head, and visually check whether the cutter head is aligned with the previous cutter head;
1. End face bounce and neutrality do not meet the requirements
The end face of the saw blade bounces and the neutrality does not meet the requirements, which will cause the saw blade to produce vibration and deflection during use, which will affect the normal performance of the saw blade. Therefore, when high-frequency welding, not only ensure the neutrality of the blade, but also weld After a cutter head, compare it with the previous cutter head, and visually check whether the cutter head is aligned with the previous cutter head;
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2. Insufficient welding strength
Insufficient welding strength is caused by many reasons. For high-frequency welding saw blades, the main reason is that the welding temperature is too high and the heating time is too long, which leads to too much loss of the solder or too much shrinkage when the solder is melted, resulting in virtual welding, which makes the actual bonding area with the blade insufficient. , Resulting in insufficient welding strength;
2. Insufficient welding strength
Insufficient welding strength is caused by many reasons. For high-frequency welding saw blades, the main reason is that the welding temperature is too high and the heating time is too long, which leads to too much loss of the solder or too much shrinkage when the solder is melted, resulting in virtual welding, which makes the actual bonding area with the blade insufficient. , Resulting in insufficient welding strength;
For laser welding saw blades, insufficient welding strength is also caused by incorrect welding process settings. If the welding power is too low and the welding speed is too fast, the penetration depth of the joint between the cutter head and the matrix is too shallow, the joint area is too small, and the bonding strength is insufficient.
Therefore, the solution to this problem is mainly through correct setting of welding process parameters, and timely adjustment when problems are found, thereby reducing the rejection rate.
3. Matrix deformation
For high-frequency welding, matrix deformation is mainly because the current is too high and the welding temperature is too high, which makes the matrix soft and deformed; for laser welding, it is mainly because the laser is biased to the matrix too much, which causes the matrix to generate thermal stress concentration and soften deformation.
To solve this problem, produce a substrate with a good material as much as possible to ensure that the thermal softening point of the substrate used is high; at the same time, the welding process must be controlled to ensure that the welding temperature is not too high; if the substrate has been softened and deformed, it should be allowed to Natural cooling can generally be restored. Do not use your feet to make it flat, otherwise the matrix will be plastically deformed and cannot be restored.
For laser welding saw blades, first ensure that the surface flatness of the substrate fixture meets the requirements. After the cutter head is clamped, the distance between the side of each cutter head and the surface of the substrate can be measured with a vernier caliper to see if it is equal to the thickness of the cutter head minus the thickness of the substrate If the difference is large, it can be adjusted before welding to prevent waste of cutter head.
