Granted Patent B2

US 7,036,227 · App. 10/774,120 · Granted May 2, 2006

Abstract

Claims (12)

1. A process for manufacturing ratchet wheels comprising the steps of:

(1) forming a cylindrical forging billet by hot or cold forging, of which the forging billet having a thru hole consisting of inter-communicating recesses which are pre-formed in a forging die;

(2) providing a broach having teeth formed thereon;

(3) machining the forging billet into a workpiece having a sidewall with two annular grooves on the sidewall;

(4) forming a semi-product having a driving recess which is complementary in shape to the teeth by operating the broach through the workpiece along the thru hole and;

(5) forming a finished product having a plurality of teeth on a sidewall thereof by milling the semi-product.

2. A process for manufacturing ratchet wheels comprising the steps of:

(1) forming a cylindrical forging billet by hot or cold forging, of which the forging billet having a thru hole consisting of inter-communicating recesses which are pre-formed in a forging die;

(2) providing a broach having teeth formed thereon;

(3) shaping the thru hole into a driving recess having a desired shape by operating the broach through the forging billet along the thru hole;

(4) forming a semi-product having a sidewall and two annular grooves formed on the sidewall by machining the forging billet; and

(5) forming a finished product having a plurality of teeth on the sidewall thereof by milling the semi-product.

Assignments (8)