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The grinding period of the crane


After the crane leaves the factory, the general provisions are about 60 hours or so of the period of grinding, which is called a period of time, which is stipulated by the technical characteristics of the manufacturing plant according to the initial use of the crane.

The grinding period is to ensure the normal operation of the crane, reduce the failure rate, and prolong the important link of its service life.

However, some users have neglected the special technical requirements of the new machine due to lack of crane use common sense or due to tight deadlines, or to get the benefit as soon as possible.

Some users even think, anyway, manufacturers have the repair period, the machine is broken by the manufacturer is responsible for the maintenance, so the machine overload for a long time to be put into use in the running-in period, cause the machine early failure occurs frequently, which not only affect the normal use of the machine, shorten the service life of the machine, but also because the machine is damaged, affect the construction schedule.

Therefore, the use and maintenance of the grinding of crane should be given full attention.

Features of the grinding period:

1. Wear fast

Due to the influence of the new machine parts processing, assembling and adjustment, the friction surface is rough, the surface contact area is small, the surface pressure is uneven.

Machine in the process of running, concave and convex part chimeric friction each other on the surface of the parts, grinding of metal debris fell down, and as an abrasive, continue to participate in friction, accelerate the abrasion on the surface of the parts with more.

Therefore, it is easy to cause wear and tear on parts (especially surface) during the grinding period.

At this time, if overload operation, may result in the damage of parts, resulting in early failure.

2. Poor lubrication

As a result of the new assembly parts fit clearance is small, and due to reasons such as assembly, it is difficult to guarantee the uniformity of fit clearance, lubricating oil (grease) in less friction surface uniform oil film formation, to prevent wear and tear.

Thus, the lubrication efficiency can be reduced, causing the early abnormal wear of the machine parts.

It can cause the friction surface to scratch or bite, causing the failure to occur.

3. Loose

New processing and assembling of the parts, geometry shape and dimension deviation, exist at the beginning of the use, due to alternating load such as shock, vibration, and the influence of factors such as heat, deformation, and the wear too fast, easy to make the original loose fastening parts produced.

4. Leakage

Due to the loose vibration of the machine, the influence of the vibration and the heat of the machine, the sealing surface of the machine and the joints of the pipe will leak.

Some defects such as casting, machining, assembly and debugging is hard to find, but due to the vibration and impact in the process of operation, this kind of defects are exposed, show the leakage (permeability) oil (water).

Therefore, it is easy to leak during the grinding period.

There are many mistakes in operation

Due to the lack of understanding of the structure and performance of the machine (especially the new operator), it is easy to fail due to operational mistakes and even cause mechanical accidents.

The use and maintenance of the grinding period

1. Because of the crane is a special vehicle, the operator should receive training and guidance from the manufacturer, have full knowledge of the structure of the machine, performance, and get some experience before operating the machine for operation and maintenance.

With the: "peration &maintenance manual of manufacturers to provide products, are the essential data of operating equipment, operator before operating the machine, be sure to read the instruction in operation and maintenance, according to the specification requirements for operation and maintenance.

2. Pay attention to the work load period, the running-in period of working load generally not more than 80% of the rated load, and to arrange a suitable work, to prevent overheating phenomenon caused by the machine long time continuous operation.

3. Pay attention to constantly observing the instructions of each instrument, abnormal occurrence, should stop the parking in time to be ruled out, not found in the cause, before the failure to rule out, should stop the operation.

4. Pay attention to regular inspection of lubricating oil, hydraulic oil, coolant, brake fluid and fuel oil (water) position and quality, and check the sealing of the whole machine.

It is found that the oil and water is not too much and should be analyzed.

At the same time, the lubrication of each lubrication point should be strengthened, and the lubricating grease (except special requirements) should be added to the lubrication point during the grinding period.

5. Keep the machine clean, adjust and tighten loose parts in time to prevent wear or loss of parts due to loosening.

6. At the end of the grinding period, the machine should be kept in a mandatory maintenance, check and adjust the work, and pay attention to the change of oil fluid.

In conclusion, the requirements of the use of the crane during the grinding period can be summarized as: strengthening training, reducing load, checking and strengthening lubrication.

As long as pay attention to and implemented according to the requirement of crane running in period of maintenance and maintenance, can reduce the occurrence of early failure, prolong service life, improve the working efficiency, make the machine to bring you more benefits.