What are the repair methods for wooden pallets? When tapping the front face of the fumigation pallet, it involves squeezing the metal outward to expand the working size. For repairing the marking template of the wooden pallet, it requires sanding the measuring surface and re-engraving. The repair of the sample column typically uses chrome plating, which is simple and quick, and also improves the wear resistance of the sample column. Sample columns that require chrome plating must be processed by grinding first, as the surface roughness after chrome plating is closely related to the surface roughness before chrome plating.

In the case of wooden pallets, the thickness of the chrome layer on each side should be such that the sample cylinder diameter should be reduced to ensure that when the measuring tool wears to its ultimate size, there is still a layer of chrome on the surface. Reconditioning would then not require pre-machining; it would only involve stripping the chrome and re-chroming, followed by machining. However, the chrome layer should not be too thick, as this would not only prolong the chrome plating time but also make it prone to internal bubbles and chrome stripping. In small-scale production, it is not advisable to use size chrome for the pallets, as achieving the required dimensions after chrome plating can only be done by controlling the concentricity of the chrome-plated sample cylinder and the anode ring with special tools.

The chrome plating method for the sample ring is essentially the same as that for the sample rod, with the only difference being that during chrome plating, an anode sample rod is placed in the hole of the sample ring (whereas during chrome plating of the sample rod, the rod is placed in an anode sample ring). The inner hole of the chrome-plated sample ring is generally not machined to avoid chrome peeling during machining. Instead, it is directly ground to achieve the desired size. Therefore, the chrome layer in the inner hole of the sample ring should not be too thick. The reason for chrome layer detachment on gauges is often difficult to determine. The adhesion of the chrome layer is related to the gauge structure, with the overall chrome layer adhesion on the gauge being strong and that on assembled gauges being poor. If there are air bubbles within the chrome layer, it may cause cracks on the gauge surface, and grinding is also prone to chrome layer detachment.

When reassembling and combining measuring tools, it is necessary to re-drill and re-bore pivot holes. If it is difficult to enlarge the pivot holes, the structure of the tool can be altered without affecting its use, and secured with screws and methyl alcohol adhesive. When repairing parts of the combined measuring tool, one should avoid wearing off the carburizing layer. Whether to re-hardened should be determined by the part's thickness, as when the part is very thin, carburizing quenching has already penetrated, resulting in deformation that cannot be corrected, and the tool cannot be repaired as well.

Some gauges cannot be cold corrected and must be heat corrected after annealing; for thin gauge planes, non-dimensionally chromed repairs can be used. When chroming the plane that interfaces with the angular face of a card, the anode should be tilted at an angle to ensure even chrome distribution. Additionally, repairs for combined gauges can employ ground washers and gaskets, with materials like unhardened copper sheets being suitable.