Hisson Plastic Machinery Co., Ltd. 

The analysis on wear causes of injection molding machine gear

by:Hisson     2020-04-28
In maintenance will be found for gear transmission, the tooth surface abrasion conditions have a variety of forms, as shown in the figure below. The figure of the gear meshing and wear state, can look for impact analysis on wear causes of tooth surface is not correct. Gear meshing and wear state diagrams ( 一) Tooth surface meshing wear trace position, is on dividing the circle of the gear, the tooth width above are evenly distributed, this is for the gear meshing transmission mesh a right position. Gear transmission using body axle hole is apart from the machining accuracy within a tolerance range of requirements, a set of gear meshing, the driveshaft wear meshing mark should be distributed. In figure, b) Tooth surface meshing and wear scar location, it is in the gear pitch circle near addendum below, this phenomenon shows that the gear meshing center distance size is greater than the size of center distance for the gear mesh theory. The measured for the gear shaft center distance, can verify this factor. In figure, c) Tooth surface meshing and wear scar location, it is in the below close to graduation circle of gear tooth root, this phenomenon shows that gear mesh size of center distance is less than the size of center distance for the gear mesh theory. In figure, d) Tooth surface meshing and wear mark position, is on the gear surface along the tooth width direction side, this phenomenon shows that gear milling gear machining precision is low, because when milling machining gear hobbing cutter feed run trend and gear axis is not parallel, there is a trace Angle, the tooth surface and form a space intersection Angle gear center, the gear tooth surface of meshing transmission with can never fully contact; Another reason for this is that, it is for the meshing gear transmission shaft centerline is not parallel. The gear meshing contact after three kinds of phenomena, will make the work of gear transmission noise increase, reduce the working life of the gear transmission. Gear maintenance work, for example, found that this kind of phenomenon, should be promptly corrected.
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