Fwincnc Laser Welding Head Protective Windows 18*2 20*2 20*3 20*4mm 1064nm 0-4kw for Hand Held Laser Welding Machine Parts
What is protective lens on the laser welding machine?
The protective lens on the laser welding machine head includes the protection lens, focusing lens, and collimating lens. These components are designed to prevent damage to the sensitive parts of the welding head from splashes, debris, or intense heat generated during the welding process, thereby extending the lifespan of the equipment.
Customization
We also support bulk customization for other specifications upon request.
Features
Long service life
High power tolerance
Double-sided anti-reflective coating
High laser transmittance
How to confirm if the protective lens is damaged?
The following two situations often accompany this issue:
1.Upon initial startup, the laser typically operates, but it gradually weakens until it is no longer able to melt the welding wire.
2.There is a noticeable flame at the welding nozzle.
When the above situation occurs, it can be initially determined that the protective lens inside the welding torch is damaged.
Nevertheless, it is still in the process of determining which set of protective lenses is defective, whether it is the protective lenses, the focusing lenses, the collimating lenses, the reflectors, or any one or more of these lenses. When a malfunction occurs, the situation described above will occur. The order of inspection of the lenses is to replace the protective lenses first, then the focusing lenses, then the reflectors and collimating lenses, and replace them according to the results of the inspection.
Visible flames from welding copper nozzles are likely to be a focusing problem.
Finally check the laser QBH connector for contamination or damage.
Product Description
Superb double-sided coating process
High damage threshold transparency enhancement film coated on both sides to minimize losses due to reflections and protect them from spatters and other hazards
Selection of high quality crystals
Made of high quality quartz crystal with excellent optical, thermal and mechanical properties.
High precision processing
Selection of high quality fused silica, after slicing, polishing, grinding and other processes of fine processing, high temperature resistance, strong laser resistance
Protective full angle, 0.5mm 45°
Protective full corners with ergonomic design for ease of use
Product Parameters
| laser welding Series |
Specifications |
Diameter(mm) |
Thickness(mm) |
| 18*2 |
18 |
2 |
| 20*2 |
20 |
2 |
| 20*3 |
20 |
3 |
| 20*4 |
20 |
4 |
| 27*5 |
27 |
5 |
| 30*1.5 |
30 |
1.5 |
| 30*2 |
30 |
2 |
| 30*4 |
30 |
4 |
| 36*2 |
36 |
2 |
| 36*3 |
36 |
3 |
| 40*2 |
40 |
2 |
| 50*2 |
50 |
2 |
| 50*5 |
50 |
5 |
| 53*1.5 |
53 |
1.5 |
| 55*1.5 |
55 |
1.5 |
How do I replace the protective lens, reflector lens, and focusing lens of my laser welding gun?
1. Protection Window
Location: Front end of the welding gun, directly exposed to welding spatter.
Replacement Steps:
a. Loosen the lens retaining ring using a dedicated wrench (typically counterclockwise rotation).
b. Remove the contaminated lens with a vacuum pick-up tool or tweezers (avoid finger contact with the optical surface).
c. Blow out residual debris inside the lens housing using clean, oil-free compressed air.
d. Clean the new lens with high-purity acetone (99.9%), then install it with the coated side facing the laser beam direction. Tighten the retaining ring to the manufacturer's specified torque (excessive force may crack the lens).
2. Reflection Mirror
Location: Laser beam turning point (e.g., articulation joint of the welding gun).
Replacement Steps:
a. Remove the mirror cover plate (note screw positions to ensure correct reassembly).
b. Carefully lift the old mirror by its edges using a lens holder. Inspect the mount for signs of thermal damage (replace if necessary).
c. Install the new mirror with the reflective surface aligned to the laser beam angle (usually indicated by an arrow mark). Secure it with a torque screwdriver as specified (e.g., 0.6-1.2 N·m).
3. Focusing Lens
Location: Inside the welding gun, near the nozzle assembly.
Replacement Steps:
a. Remove the nozzle and copper tip to expose the lens assembly.
b. Unscrew the focusing lens barrel using a lens spanner (check thread direction-some brands use reverse threads).
c. If the old lens is stuck, soak it in acetone for 5 minutes before removal.
d. Before installing the new lens, verify its surface flatness with a laser interferometer (tolerance < λ/10, where λ is the laser wavelength).
Packaging & Shipping
Certifications
FAQ
Question : How about your after service ?
Answer : Technical support by phone, e-mail or MSN around the clock.
Question : How can we install the consumables?
Answer : Friendly English version manual and operation video CD disk.
Question : How do I choose the right consumables for my machine?
Answer : According to your needs and budget, we will provide the best answer for your efficient production.
Question : How about the payment terms?
Answer : 30% T/T for deposit, 70%T/T paid before shipping.
Question : When can I get the price?
Answer : We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price, please tell us in your email so that we will regard you inquiry priority.
Question : Can I get a lower price if I order large quantities?
Answer : Yes, once the order is confirmed, you will enjoy our factory price.
Question: Which port is the nearest from your company ?
Answer : The Qingdao port is the nearest
Question: Can I have a visit to your factory before the order?
Answer : Yes, look forward to communicating and cooperating with you.
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How to confirm if the protective lens is damaged?
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