What is called a gear diagram?
Generally, a gear work diagram includes the following:1. view. That is, cylindrical gear parts, usually expressed in two views.2. dimensioning. Including ensuring the accuracy of gear processing and measurement of relevant parameters, the base surface, the diameter of the gear circle.3. mark dimensional tolerances and form tolerances. The tolerance value is usually determined according to the precision grade of the gear.The dimensional tolerances and geometrical tolerances to be marked on the gear drawing:(1) gear shaft hole is an important benchmark for measuring and processing, assembly, high dimension precision, should be in accordance with the nature and the precision of calibration tolerances on the assembly drawing, check tolerance table, the limit deviation.(2) deviation value and the addendum circle diameter is used as the measuring datum, and was negative. In order to guarantee the backlash of the gear pair when the limit deviation of the tooth thickness is chosen, the tooth crown circle becomes the measuring reference, and the gear blank size and shape tolerance table in the deviation of the addendum circle diameter.
Fill out the spare parts listGenerally, a gear work diagram includes the following:1. view. That is, cylindrical gear parts, usually expressed in two views.2. dimensioning. Including ensuring the accuracy of gear processing and measurement of relevant parameters, the base surface, the diameter of the gear circle.3. mark dimensional tolerances and form tolerances. The tolerance value is usually determined according to the precision grade of the gear.The dimensional tolerances and geometrical tolerances to be marked on the gear drawing:4. mark the surface roughness5. write the meshing characteristics table. The properties table includes:(1) the basic parameters of gear;(2) precision grade;(3) cylindrical gears and gear drive test items;(4) gear backlash and tooth thickness deviation limits or tangent length limit deviation;6. write technical requirements. The technical conditions on the gear diagram generally include:(1) on the surface of the material performance requirements, such as heat treatment, heat treatment should reach the hardness.(2) of unspecified figure in the fillet, chamfer and other special requirements description.
The following gear working drawing design points: 1) select the horizontal axis position draw the main view, if need spokes, the structure and size of keyway expression, then draw the other view; 2) marked gear size and shape tolerance, such as tooth tip, end face runout, keyway symmetry 3) marking surface roughness and the contact surface roughness is high; 4) according to the "gear manual" or "mechanical design manual" or "mechanical design" teaching materials for tolerance group values, and in the upper right corner of the drawing list mark the number of gear teeth and tolerances, the specific format refer to the specification of gear graph; 5) write on heat treatment requirements, round, chamfering undimensioned requirements and deburring requirements.
Gear work drawing refers to the various dimensions of the gear data related to the engineering drawings.
