Recovery
Your equipment is as good as new and comes with a 6-month warranty. With over 48 years in the market, Lufer develops solutions for the structural repair of earthmoving, mining, and forestry equipment, including H-frames, trucks, axles, hydraulic cylinders, booms, arms, beams, buckets, equalizer bars, links, grabs, carriers, dromos, and other structural items. We also offer customized projects tailored to the client's needs, either based on their specifications or refined by our engineering team.
What sets us apart is that we apply all the steps used in manufacturing new components to the recovery process, gathering information and understanding why the component failed. This makes all the difference in the final result.
VDW - Vibration During Welding
Vibration during welding works as follows: two pneumatic vibrating units are attached to the workpiece. The units are adjusted to the ideal vibration level, measured by an accelerometer. The units are robust and unaffected by the welding current. The application of vibratory energy provides excellent penetration of the weld pool. Furthermore, it reduces the thermal gradient between the interfaces: the base metal weld pool, the external medium weld pool, and the internal part of the weld bead. This reduction results in better weld bead grain size and better heat distribution in the Heat Affected Zone (HAZ). This results in improved mechanical properties of the HAZ. Better heat distribution in the HAZ reduces workpiece distortion. This reduces distortion caused by weld cooling. This improves the mechanical properties of the HAZ. This reduces residual stress levels.
Machining
Lufer's extensive experience in repair services, now available in the field. With Lufer's field machining, you gain agility, cost-effectiveness, and versatility in repairing your equipment, ensuring standard part quality requirements such as concentricity and dimensional tolerances, which are essential for the functionality and performance of your machine. Contact our consultants to learn more about Lufer's Field Machining.
Interference Assembly and Disassembly
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As an important complement to housing repair and bushing supply services, LUFER offers thermal assembly for interference joints. Thermal energy has the physical property of altering the dimensions of materials, especially ferrous materials. Heat expands, and cold contracts. We leverage this property to significantly improve the integrity of newly machined areas, where new bushings will be installed. We prefer to use cryogenics, applying very low temperatures for contraction. Since we mostly use liquid nitrogen, we're talking about -178 degrees Celsius, enough to allow the bushing to temporarily slide within the housing. In specific cases involving large parts, we combine contraction with expansion. For field assembly, we use solid CO2 (dry ice), which reaches a temperature of -78 degrees Celsius. Benefits of Cryogenics: - Economical and non-aggressive – only the area around the components is cooled. - Fast – cryogenic cooling with liquid nitrogen, for example, is very fast, not exceeding 30 minutes in most cases. - Safe – no damage to components, no change in material properties, and no wear due to adhesion between parts.