To how to maintain quality 1 large mechanical processing.
Large mechanical processing in the process of its control the quality of the raw materials, usually the raw materials of high quality is the premise condition of producing high quality products, no matter what, by raw materials to the factory after the chemical composition of go through strict inspection, determination of grain size, purity assessment.
Its purpose is to timely adjust the heat treatment deformation, improve the quality of tooth profile processing.
Production: gear transmission noise more than 30% from burr, knock against the cause of injury.
Some factories in front of the gear box assembly, remove burrs and knocked wounded, is a passive way.
To deal with prepared for the organization.
That should be paid attention to in normalizing or quenched and tempered treatment, be sure to keep the furnace temperature uniformity, and the workstation, parts evenly heating and cooling, are strictly prohibited to pile up together.
Large precision machining
need to control the precision of the gear, the basic requirement of the precision of gear, it has been verified by practice that must be controlled in GB10995 - gear precision
887-8, linear velocity is higher than the 20 m/s gear, pitch limit deviation, ring gear tooth to radial run-out tolerance, tolerance must be stable accuracy reached level 7.
To prevent the heat treatment deformation: gear billet into fine forging after rough precision machining, normalizing or conditioning treatment.
Large mechanical processing considerations large mechanical processing before work wear protective equipment should be prohibited to wear gloves and scarves, before start the machine tool must know about the purpose or the handle operation method, check each part of the machine tool running normally, must use in front of the machine to start the wrench clamping tool and the workpiece, without guidance personnel allowed not to start the machine.
Large mechanical processing machine to start the former do not allow the speed change, sweep or measurements, etc, are not allowed to touch the running parts, machine tools, such as a foreign body found or scraps are not allowed to get or blow with the mouth with the hand, found a loose items or equipment at work when there are abnormal, should stop immediately.
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