What factors will affect the gear machining accuracy of SAF97-60-0.75KW reducer

Spindle rotation accuracy : radial circular jumping, end surface circular jumping and axial jumping of the working parts at the front end of the spindle will cause eccentricity and tooth shape errors to produce processing gears. For example, the roundness error of the spindle journal, the verticality error of the bearing axial positioning surface and the spindle axis, etc., will affect the gear processing accuracy.

Guide rail guidance accuracy : Accuracy indicators such as linearity and parallelism of the guide rail affect the relative motion accuracy between the tool and the tooth blank. If there is an error in the guide rail, it will cause tooth direction errors and so on during the processing of the gear.

Transmission accuracy of transmission chain : The manufacturing errors and assembly errors of various transmission elements in the transmission chain, such as gears, racks, worm gears, worms, etc., will accumulate and transfer to the machined gear according to the transmission ratio, affecting the gear splitting accuracy and motion accuracy of the gear.

Positioning accuracy : If there are manufacturing errors or wears in the positioning elements of the fixture, the positioning of the tooth blank in the fixture will be inaccurate, resulting in errors such as eccentricity in the gear processing, affecting accuracy indicators such as ring gear diameter jump.

Clamping deformation : Excessive clamping force may deform the tooth blank, especially for some thin-walled gears or poor rigidity. After processing, loosen the clamp, the gear will cause shape errors due to elastic recovery.

Tool manufacturing accuracy : The tooth shape accuracy, dimensional accuracy, etc. of the tool itself directly affect the gear machining accuracy. For example, the tooth shape error of the hob will be directly reflected on the tooth shape of the machined gear.

Tool wear : The tool will gradually wear during a long period of processing, causing the tooth shape and size of the tool to change, thereby affecting the machining accuracy of the gear. The worn tool will increase the tooth shape error of the machined gear and the tooth surface roughness will deteriorate.

Cutting usage : Inappropriate selection of parameters such as cutting speed, feed amount and cutting depth may lead to excessive cutting force, causing deformation of the tooth blank, affecting the processing accuracy; it may also affect the wear speed of the tool, indirectly affecting the gear processing accuracy.

Processing process route : Unreasonable process routes, such as improper arrangement of heat treatment processes, may cause excessive internal stress to the gear during processing, causing the gear to deform after processing, affecting the accuracy.

The dimensional accuracy of the tooth blank : The dimensional accuracy of the outer diameter, inner diameter, thickness of the tooth blank will affect the uneven distribution of the processing allowance of the gear, which in turn will affect the processing accuracy. For example, the size deviation of the outer diameter of the tooth blank may cause insufficient margin on one side during gear processing, affecting the tooth shape accuracy.

Quality of tooth blank material : The hardness of tooth blank material and internal defects (such as pores, inclusions, etc.) will cause uneven force to the tool during processing, resulting in vibration, affecting the processing accuracy and tooth surface quality.