(0)B23F:0/1:
IPC6
SECTION B - PERFORMING OPERATIONS; TRANSPORTING
MAKING GEARS OR TOOTHED RACKS
B23F
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B 23 F

 MAKING GEARS OR TOOTHED RACKS (by stamping B 21 D; by rolling B 21 H; by forging or pressing B 21 K; by casting B 22; arrangements for copying or controlling B 23 Q; machines or devices for grinding or polishing, in general B 24 B)
 

Notes

(1)

 This subclass covers:
 

-

 the use of methods or apparatus specially designed to produce accurately the shapes of gear teeth which are essential for proper intermeshing of toothed gearing elements to ensure the required relative motions;
 

-

 the use of similar methods or apparatus in the production of other articles of toothed or like form, e.g. dog clutches, splined shafts, milling cutters.

(2)

 This subclass does not cover the production of such other articles of toothed or like form using methods or apparatus other than those mentioned under Note (1) above.

(3)

 In this subclass, the following terms or expressions are used with the meanings indicated:
 

-

 "gear teeth" covers the teeth or lobes of other accurately-intermeshing members having relative movement of a similar kind, such as rotors of rotary pumps and blowers;
 

-

 "profile" may include the outline of both faces or only one face of a tooth, or the opposing faces of adjacent teeth;
 

-

 "straight" means that a tooth as a whole (ignoring any curvature of the tooth-face alone, e.g. crowning) is straight in the direction of its length, for example as seen in the direction of a radius of a spur wheel. It accordingly includes the teeth of helical gears and of the normal type of bevel gear;
 

-

 "broach-milling" means milling with a rotary cutter having a number of teeth of progressively increasing depth or width.

 

 

 
 

 1
/ 00 Making gear teeth by tools of which the profile matches the profile of the required surface (special adaptations for making curved teeth B 23 F 9/00)

1
/ 02 • by grinding  

1
/ 04 • by planing or slotting  

1
/ 06 • by milling  

1
/ 08 • by broaching; by broach-milling  
 

 3
/ 00 Making gear teeth involving copying operations controlled by templates having a profile which matches that of the required tooth face or part thereof or a copy thereof to a different scale (copying systems or devices per se B 23 Q 35/00)
 

 5
/ 00 Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made

5
/ 02 • by grinding  

5
/ 04 • • the tool being a grinding worm  

5
/ 06 • • the tool being a grinding disc with a plane front surface  

5
/ 08 • • the tool being a grinding disc having the same profile as the tooth or teeth of a rack  

5
/ 10 • • the tool being a grinding disc having the same profile as the tooth or teeth of a crown or bevel wheel  

5
/ 12 • by planing or slotting  

5
/ 14 • • the tool having the same profile as a tooth or teeth of a rack  

5
/ 16 • • the tool having a shape similar to that of a spur wheel or part thereof  

5
/ 18 • • the tool having the same profile as a tooth of a crown wheel  

5
/ 20 • by milling  

5
/ 22 • • the tool being a hob for making spur gears  

5
/ 24 • • the tool being a hob for making bevel gears  

5
/ 26 • • the tool having the same profile as a tooth or teeth of a rack, for making spur gears  

5
/ 27 • • the tool having the same profile as a tooth or teeth of a crown or bevel wheel [2]  

5
/ 28 • by broaching; by broach-milling  
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