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How to write a model essay on maintenance acceptance report

The following is a detailed introduction to the model maintenance acceptance report:

The maintenance acceptance report can be divided into three parts. First, it can describe the scope of acceptance; Second, it can describe what preparations should be made for acceptance; Third, it can describe what the acceptance criteria are.

Model maintenance acceptance report 1:

According to the contract signed by both parties, from September 0, 2065438 to October 20, 2065438/kloc-0, our company repaired a crane with a lifting capacity of 32 tons × 22 meters and a working level of A6. Maintenance purpose: By overhauling the bridge on the ground and repositioning, installing and adjusting the crane operating mechanism, the phenomenon of rail gnawing of the crane is completely solved, and the safe and reliable operation of the crane is ensured.

Maintenance location: your warehouse

The main contents of maintenance are as follows:

1. Investigated the important data before demolition, and found out the reason why the crane chewed the rail seriously before. The main problems found are:

⑴. The two bearings (model: 7524) at the right end of the left passive wheelset were seriously damaged, and the wheel swing caused by this defect reached more than 4mm, which was the main reason for the serious rail gnawing of the crane before.

⑵. The deviation of the crane wheel from the focus (flatness deviation formed by four big wheels) is unqualified, that is, the driven wheel at the right end is 6mm higher than the plane, which is the reason why the wheel is always slightly worn, and it is also one of the main reasons why the crane was difficult to adjust before and chewed the rail seriously.

(3) The crack length of the steel plate where the reducer is placed on the right platform is 300mm, and the crack length of the weld between the steel plate and the angle steel exceeds 1000mm, so there is still missing welding. These defects are the main reasons for the abnormal vibration of cranes in the past, and they are also one of the factors that gnaw the rails.

2. All components of the traveling mechanism (including motor, reducer, brake and six groups of coupling) are disassembled, overhauled, repositioned, installed and adjusted. The items and indicators controlled in this part are strictly in accordance with the technical agreement and stricter than the national standards. The main situation is as follows:

⑴. In order to adapt to the long one-way running distance and total running distance of the crane, the five indexes of the crane's active side span, passive side span, wheel focus and horizontal relative deviation of wheels on the same axis of the active and passive sides are controlled according to zero deviation.

Note: The benchmark of crane span is 14 the average of the actual dimensions of the track at the steel column of the workshop.

⑵ Before installation, the wheel diameter error, hardness error, radial and end-face runout error on the same axis were carefully measured and strictly controlled. Due to the unqualified diameter error, relative error and end face runout error, the two groups of driving wheel pairs were reworked after assembly.

(3) For the measured data of the above and other indicators, please refer to the installation quality record of the crane operating mechanism.

3. The structural deformation of bridge platform, end beam and cab is corrected, repaired and reinforced. Mainly deal with the cracks in the steel plate and weld where the reducer is placed.

4. The running track of the cart is tested, and the total straightness of the track, the straightness of the track within any 2m and the problematic part of the span are partially adjusted.

5.65438+2009120 October, no-load and dynamic load operation tests were carried out. The crane operating mechanism runs smoothly, and there are no abnormal phenomena such as rail gnawing, vibration and abnormal sound. In order to ensure its reliability and service life, it was precisely adjusted.

6. The current operating mechanism still has defects:

(1). The wheel width should be 150mm, actually 160mm, the wheel groove width should be 100 mm, and the actual size is 105mm (when the wheel width is 160mm, the groove width is Note that no matter how many wheels the wheel width is.

⑵. There is still a gap between the total straightness of the track and the straightness of any 2m and the national standard, but the visual inspection has little influence on the crane operation, so the maintenance personnel will adjust it if possible.

To sum up, the maintenance of the crane meets the requirements of the contract and achieves the expected purpose. Analysis of wheel life after maintenance;

⑴. Parameters: The design life of mechanism working level A6 is 6400h, the average running time is 90m (longest 150m, shortest 30m)× 65438 times per shift× 3 shifts× 300 days (working days per year), and the running speed is 70m/min.

⑵. Calculation result: total driving distance =70m×60min×6400=26880km or 26880km ÷ (90m×100× 3 shifts) =996 days ÷300 days = the service life of the wheels after maintenance promised by the supplier is not less than the above calculation value.

The above data tests are conducted by both parties. The main technical director and quality supervisor is engineer Ma.

Buyer's Representative: Supplier (Qingzhou three sheng) Representative:

Attachment: Installation Quality Record of Operating Mechanism of Telescopic Boom Crane

Maintenance acceptance report model essay 2:

Maintenance project name:

Maintenance project management unit (seal):

Name of Maintenance Project Management Unit Participating in Acceptance Unit Owners' Committee Property Service Unit Construction Unit Community Neighborhood Committee Supervision Unit Other Units Start Time Completion Time Project Cost RMB: Year Yuan (month, month, day, month) List of Acceptance Members Name Job Specialty.

Project overview

Acceptance content

Property Services Section of Owners' Committee

Signature of directors:

(Official Seal of Industry Committee) Year Month Day

Acceptance of neighborhood committees in communities where participating units are located.