Introduce the machining process of CWO-125-25-IIF worm gear reducer gears

The CWO-125-25-IIF worm gear reducer includes a worm gear and a worm gear, and its machining process is as follows:
Worm gear processing technology

Hobbing machining: Using a worm gear rolling cutter with the same basic parameters as the working worm gear, the tooth profile is cut according to the principle of generating method. There are two main methods for gear hobbing: radial feed method and tangential feed method. In the radial feed method, the rolling cutter and the workpiece roll together at a certain transmission ratio (Z1 is the number of threads on the working worm, Z2 is the number of teeth on the worm wheel) until the center distance between the two reaches the center distance when the working worm and worm wheel mesh. In the tangential feed method, in addition to the rotation of the rolling cutter, axial feed and additional rotation of the machine tool worktable are also required to achieve generating motion. The machining accuracy of the tangential feed method is generally lower than that of the radial feed method, but the tooth surface quality is better and root cutting is less likely to occur. The accuracy of rolling and cutting worm gears can generally reach 6-8 levels.

Shaving processing: When manufacturing precision worm gears, shaving can be performed after hobbing. The basic parameters of the shaving cutter should be consistent with the working worm. Shaving can be carried out on a hobbing machine, which can shave freely or forcibly under the control of the machine tool transmission chain. After shaving, the quality and accuracy of the tooth surface will be improved.

Gear honing and grinding: In order to further improve the quality of the tooth surface and enhance the meshing between the worm gear and worm, gear honing or grinding can be performed on a gear hobbing machine. The honing tool is a honing worm gear made of a mixture of abrasive, plastic, and resin cast on a substrate, while the grinding tool uses a grinding worm gear made of cast iron and abrasive to grind against the worm wheel.

Worm gear processing technology

Turning processing: Firstly, the worm gear blank is turned to produce the basic shape of the worm gear, such as the outer circle and thread.

Milling or hobbing: Using milling cutters or rolling cutters to process the tooth profile of the worm, the spiral tooth profile of the worm is machined through the principle of generating method.

Heat treatment: Worm gears are usually made of 20CrMnTi or 42CrMo materials, and the surface is treated with carburizing and quenching. The surface hardness needs to reach HRC58-62, and the core should maintain the toughness index of HRC28-32.

Grinding processing: After heat treatment, the worm gear is ground, including outer circle grinding and tooth profile grinding, to improve the dimensional accuracy and surface quality of the worm gear and ensure the meshing accuracy with the worm wheel. Worm threads require CNC whirlwind milling technology, with helix angle deviation not exceeding ± 5 'and lead error controlled within 0.01mm/100mm.