Method and apparatus for alignment of gearing

In the manufacture of gears which are integrally formed spaced apart on a shaft using a form cutting tool, the method of providing for predetermined alignment of the teeth of one gear with the teeth of another gear on said shaft comprising the steps of:

• providing said shaft with opposed recess means of predetermined dimensions formed spaced apart on said shaft in predetermined alignment with each other;
• providing a first gear master part having at least one set of opposed tooth flanks forming at least one tooth space of predetermined proportions;
• providing a fixture mountable on said shaft for holding said first gear master part on said shaft, said fixture including locating pin means thereon;
• mounting said fixture on said shaft with said locating pin means disposed in said one of said recess means and in a tooth space on said first gear master part for locating said first gear master part in a predetermined position with respect to said shaft prior to locating said cutting tool in a tooth space;
• mounting said first gear master part on said shaft in a predetermined position as determined by one of said recess means;
• premarking said opposed tooth flanks to indicate contact with cutting tool;
• and
• positioning said cutting tool in a tooth space and adjusting the position of said cutting tool with respect to said opposed tooth flanks so as to substantially center said cutting tool in said tooth space on said first gear master part to locate said cutting tool with respect to at least one of said flanks and said shaft for cutting said teeth of one of said gears in predetermined alignment with respect to said shaft.

In the manufacture of gears which are integrally formed spaced apart on a shaft using a form cutting tool, the method of providing for predetermined alignment of the teeth of one gear with the teeth of another gear on said shaft comprising the steps of:

• providing said shaft with opposed locating means of predetermined dimensions formed spaced apart on said shaft in predetermined alignment with each other;
• providing a first gear master part having at least one set of opposed tooth flanks forming at least one tooth space of predetermined proportions;
• providing a fixture mountable on said shaft for holding said first gear master part on said shaft, said fixture including locating means thereon;
• mounting said first gear master part on said shaft;
• mounting said fixture on said shaft with said locating means on said fixture in registration with one of said locating means on said shaft and in a tooth space on said first gear master part for locating said first gear master part in a predetermined position with respect to said shaft prior to locating said cutting tool in a tooth space;
• positioning said cutting tool in a tooth space to locate said cutting tool with respect to at least one of said flanks and said shaft for cutting said teeth of one of said gears in predetermined alignment with respect to said shaft;
• and
• removing said first gear master part and said fixture from said shaft.

In the manufacture of gears which are formed on a shaft using a form cutting tool, the method of providing for predetermined alignment of the teeth of one gear with respect to said shaft comprising the steps of:

• providing said shaft with locating means of predetermined dimensions formed on said shaft;
• providing a gear master part having at least one set of opposed tooth flanks forming at least one tooth space of predetermined proportions;
• providing a fixture mountable on said shaft for holding said gear master part on said shaft, said fixture including locating means thereon;
• mounting said gear master part on said shaft;
• mounting said fixture on said shaft with said locating means on said fixture in registration with said locating means on said shaft and in a tooth space for locating said gear master part in a predetermined position with respect to said shaft prior to locating said cutting tool in a tooth space;
• and
• positioning said cutting tool in a tooth space of said gear master part to locate said cutting tool with respect to at least one of said flanks and said shaft for cutting said teeth of said gear in predetermined alignment with respect to said shaft.