New Invention of Gear Processing for Heavy Anchor Windlass

Technology Field 

This present invention relates to a method for processing gears, in particular it is a special processing method for large modulus gears of heavy anchor windlass.

Background

The field of marine engineering is a key of China's 12th Five-Year Plan. It mainly includes large-scale ships such as offshore drilling platforms, large-scale offshore floating cranes, marine pipelaying engineering ships and wind power generation installation ships. All of these marine vessels will use large open gears As one of the typical forms of gear transmission, the large-scale open gear is widely used in the typical equipment of all kinds of cranes and anchor twisters of marine vessels. Due to the particularity of the marine engineering, it requires relatively high manufacturing requirements for the open gear ; And the general use of such a free-wheel forging process, not only forging costs increase, and it is easy to produce deformation in the processing, whether it is heat treatment deformation or deformation in the machining process are inevitable and difficult to control, so not only reduce The production efficiency, and processing quality can not be guaranteed.

Content of the invention

The technical problem to be solved by the present invention is to provide a special processing method for a large-sized anchor windlass big modulus gear with high processing efficiency and good product quality.

In order to solve the above technical problem, the technical scheme of the present invention is that: a special processing method for a large modulus gear of an anchor windlass includes the following steps:

A, forging: the preparation for ring forging processing, and after forging normalizing treatment, and provide material testing report;

B, the treated material preparation using the lathe end surface and the inner and outer circle roughing, and left in the car when leaving a margin of 5mm unilateral, the length of both sides of the car when leaving 8mm margin;

C, after processing the workpiece through the crossed both ends, and drilling hoisting hole 4-M24, tapping 50mm, the location of the circle in the φ500;

D, the workpiece using 100% ultrasonic testing detection;

E, machining center milling teeth m ≥ 10; steps are: a, modeling, b, programming, c, machining center production and processing; public law to stay 3mm - 6mm margin, the gear teeth after rough hobbing Chamfering

F, the gear is quenched and tempered, Brinell hardness value to reach Brinell hardness HB230--320;

G, after the quenching and tempering of the gear sampling test, that is, by sampling the quality of the workpiece after conditioning, after passing the test, the use of lathe on the gear bore, face and addendum circle semi-finishing, the inner hole Of the inner diameter to stay, 0.5mm margin, the length of the end left 6mm margin, the tip top round car to size, engraved reference slot;

H, grinding hole to size φ

I, using 100% ultrasonic on semi-finished gear detection test;

J, in the tooth profile obtained after tooth milling on the same side of any two opposite toothed tooth surface center line drawn on the tooth tip of the profile of the reference groove to identify, draw out the location of each hole line ;

K, Drill each hole with a drill press, leaving a diameter of 8mm for each hole.

L, machining center milling teeth, the steps are: a, modeling, b, programming, c, machining center production and processing; milling cutter standard m ≥ 10;

M, on the teeth after the end of chamfering, deburring;

N, with the reference plane and the hole positioning, grinding teeth;

O, line cut keyway;

P, with a lathe to the hole and the two end finishing car to a predetermined size;

Q, with reference plane positioning, addendum circle correction grinding;

R, each hole on the ring gear to expand, drill, hinge processing;

S, 100% MT inspection of tooth detection, size inspection, coated anti-rust oil storage.

The beneficial effects of the invention are as follows: 

Instead of the original free-forging process, the rolling ring process not only saves materials and reduces the forging cost but also improves the mechanical properties of the product. When the lifting hole is processed, the U-drilling process not only has high efficiency , and installation accuracy can be guaranteed.