Key Technologies of NC Turning Process for Plane Double Enveloping Hourglass Worm

The processing of planar secondary enveloping toroidal worm helicoids is generally divided into two steps: turning and grinding. At present, most of the machining is performed on special equipment based on lathes or gear hobbing machines. The adjustment of this machine is cumbersome and requires technical requirements for workers. High, and the labor intensity is relatively large, does not get rid of dependence on special machine tools. In order to reduce the manufacturing cost, reduce the influence of human factors, improve the machining accuracy and efficiency of worms, and promote the development of toroidal worm drive technology, our company conducted an experimental study on the numerical control turning of the spiral surface of a planar secondary enveloping hourglass worm.

Plane secondary enveloping toroidal worm CNC turning technology core technology:

A helical turning principle is proposed based on the three-axis linkage CNC lathe with C-axis: a three-axis linkage is used for the straight-running roughing of the toroidal worm spiral surface. When turning the spiral surface, the cutter body is always perpendicular to the worm axis. When the roughing vehicle moves in the Z direction, the initial position of the worm does not change, and the rotation angle changes. Use a cutting knife to cut one side spiral surface of the worm and then process the other side spiral surface.

Innovation:

1. To make the turning surface of the spiral worm surface free from the dependence on special machine tools;

2, different specifications of the worm no longer need to manufacture the corresponding tool holder, tool holder, turning tool and other tooling, reduce costs and shorten the delivery cycle;

3, processing efficiency is improved, processing accuracy is guaranteed;

4. It reduces the technical requirements for operators and facilitates the company's expansion of production scale.

Shanghai Ji Long Heavy Industry Machinery Co., Ltd. achieved the phased results:

1. The flat secondary enveloping hourglass worm produced by this company successfully uses this technology, which greatly improves the processing efficiency, shortens the manufacturing cycle, ensures the processing accuracy, and the product has been recognized by the customer;

2. Published a thesis “The Numerical Control Method and Programming Principle of the Point Trajectory of the Straight Profile Worm Worm”——2011.9, the core journal “Machine Tool and Hydraulics”;

3. Complete a plane double enveloping hourglass worm CNC turning lathe and it has been put into production.

4. One invention patent: A four-linkage toroidal worm CNC lathe grinding machine and its processing method, patent number .0, has entered the stage of substantive examination;

5, 1 utility model patent: A four-linkage toroidal worm grinding machine, patent number: ZL201020684550.7, has been authorized.