Technology and device for repairing wear shaft through multi-point positioning method

Abstract

The invention belongs to the technical field of repairing, and particularly relates to a technology and device for repairing a wear shaft through a multi-point positioning method. The technology is characterized by comprising following steps that firstly, a sample plate rule is manufactured; secondly, positioning points are manufactured; thirdly, the height of the positioning points is trimmed; fourthly, a worn shaft head or a worn shaft neck is painted with a polymer compound material; fifthly, a shaft part is mounted before the polymer compound material is cured, positioning is carried out through the positioning points, a matching face is pressed out through the shaft part, and the size and the form and location tolerance are ensured; and sixthly, the polymer compound material is cured at the normal temperature or through heating. Equipment does not need to be greatly detached, complex dedicated equipment is not needed, the size and the form and location tolerance of the equipment are ensured, on-site repairing can be directly carried out, the repairing time is short, and the repairing cost is low. A large mold does not need to be machined.

Description

Technical field [0001] The invention relates to a process and a device for repairing a worn shaft by a multi-point positioning method, and belongs to the technical field of repair. Background technique [0002] Wear is one of the most common failure modes of mechanical equipment parts. Due to various factors in long-term operation of mechanical equipment, journals, shaft heads and other parts often wear out. The traditional maintenance methods are mainly scrapped and renewed, repair welding machining , Thermal spraying or electric brush plating repair, although these repair methods can restore the accuracy of the equipment to varying degrees, but all parts need to be disassembled, not only the repair time is long, the labor intensity is high, but also the equipment maintenance cost remains high. An important factor of [0003] Scrap update: This method can restore the original accuracy of the equipment to the maximum. The disadvantage is that it requires sufficient spare parts res...

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Problems solved by technology

[0002] Abrasion is one of the most common failure forms of mechanical equipment parts. Due to the influence of various factors during the long-term operation of mechanical equipment, the journal, shaft head and other parts often suffer from wear and tear. The traditional maintenance methods are mainly scrap renewal, repair welding machine processing , thermal spraying or electric brush plating repair, although these repair methods can restore the accuracy of the equipment to varying degrees, but all parts need to be disassembled, not only the repair time is long, the labor intensity is high, but also the cost of equipment maintenance remains high. an important factor of

[0003] Scrap update: This method can restore the original accuracy of the equipment to the greatest extent. The disadvantage is that it needs sufficient spare parts reserves, which increases the spare parts inventory; for some imported or fine, large and thin equipment, due to the lack of spare parts reserves, it often results in long-term downtime and waiting for accessories. The situation seriously affects the continuous production of enterprises

[0004] Repair welding machine processing: This method can repair the wear of the shaft head and journal to basically restore the accuracy of the equipment, but due to the influence of repair welding thermal stress, it is easy to cause the shaft head to bend and deform, or even break and cause accidents

[0005] Brush plating: The coating formed by brush plating has a good bonding force with the metal, and there is no thermal stress effect, but because the coating is thin, this method can only repair the situation with a small amount of wear, and requires special equipment. Generally, it must be repaired by professional outsourcing units.

[0006] Thermal spraying: This method can be used for the repair of shaft heads and journals with a large amount of wear. Its disadvantages are that the coating is not dense enough, the bonding strength is low, and the coating is easy to fall off during operation.

[0007] The above four methods all need to disassemble all the damaged parts, the construction period is long, the labor intensity is high, and the maintenance cost is high.

[0008] The use of polymer composite material bilateral positioning mold method to repair shaft head and journal wear can be used as a supplementary means of the above traditional technology. This method can better ensure the size and shape tolerance of the repair, and the repair period is short and the cost is low. The equipment needs to be largely dismantled, but for some shaft heads and journals with larger diameters, if the mold method is used to repair, it will be inconvenient to process because the mold is too large

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