Tangential thread rolling head

Abstract

The invention relates to a tangential thread rolling head comprising two fork-like rolling head arms each rotatably coupled with a thread roll by an axle. The thread rolls respectively engage with a pinion and can be pushed laterally into an assembled position into the rolling head arms before installation of axles, in which one of the axles can be pushed into a bearing bore hole of the thread rolls. The thread rolls and the pinions have interacting catches that are configured such that each of the thread rolls can only be pushed laterally into the assembled position in a single defined rotary position.

1 . A tangential thread rolling head comprising:
 two fork-like rolling head arms;   two thread rolls, each having a bearing bore hole and one or more catches, each thread roll is rotatably mounted on an axle to the two fork-like rolling head arms, the two thread rolls are configured to be laterally pushed into an assembled position on the two fork-like rolling head arms before installation of each axle, each axle configured to be inserted into the bearing bore hole of one of the two thread rolls; and   two pinions having one or more catches, wherein each of the two pinions is configured to engage a corresponding thread roll,   wherein the catches of the thread rolls and the pinions are configured to interact with each other such that each of the thread rolls can only be pushed laterally into the assembled position in a single defined rotary position, and wherein the catches of the thread rolls are configured such that each of the catches of the two pinions can only interact with the catches of the corresponding thread roll.   
     
     
         2 . The tangential thread rolling head according to  claim 1 , wherein the one or more catches of the two pinons are complimentary to the catches of a respective corresponding thread roll. 
     
     
         3 . The tangential thread rolling head according to  claim 1 , wherein the catches on the thread rolls are disposed opposite each other and the catches on the pinions are disposed opposite each other. 
     
     
         4 . The tangential thread rolling head according to  claim 3 , wherein a distance between at least two oppositely disposed catches of one of the two thread rolls is different than at least two oppositely disposed catches of another thread roll. 
     
     
         5 . The tangential thread rolling head according to  claim 3 , wherein oppositely disposed ends of the oppositely disposed catches of the two thread rolls lie on two imaginary parallel lines. 
     
     
         6 . The tangential thread rolling head according to  claim 5 , wherein a distance between the two imaginary parallel lines for each of the two thread rolls is different. 
     
     
         7 . The tangential thread rolling head according to  claim 3 , wherein oppositely disposed ends of the catches of the thread rolls each lie on an imaginary common line. 
     
     
         8 . The tangential thread rolling head according to  claim 7 , wherein the imaginary common lines are spaced from each other when the two thread rolls are in the assembled position. 
     
     
         9 . The tangential thread rolling head according to  claim 5 , wherein at least two oppositely disposed ends of the catches of the two thread rolls lie on sides of an acute angle. 
     
     
         10 . The tangential thread rolling head according to  claim 9 , wherein the acute angle for each of the two thread rolls is different. 
     
     
         11 . The tangential thread rolling head according to  claim 1 , wherein the catches of the two thread rolls each form at least one stop surface configured to abut the catches of a corresponding pinion when in the assembled position. 
     
     
         12 . The tangential thread rolling head according to  claim 11 , wherein the at least one stop surface has a curved progression. 
     
     
         13 . The tangential thread rolling head according to  claim 11 , wherein the at least one stop surface is formed by a stop section connecting two opposite-lying catch sections of one of the two thread rolls. 
     
     
         14 . The tangential thread rolling head according to  claim 13 , wherein the stop section has a smaller thickness than the opposite-lying catch sections so that a seat delimited by the stop surface is formed between the opposite-lying catch sections for a complementarily designed catch of the corresponding pinion. 
     
     
         15 . The tangential thread rolling head according to  claim 14 , wherein the seat of each of the two thread rolls have different widths. 
     
     
         16 . The tangential thread rolling head according to  claim 1 , further comprising:
 a rolling head holder configured to pivotably mount the two fork-like rolling head arms on a common axle running parallel to a roll axles; and   a means for adjusting a pivot position of the rolling head arms on the rolling head holder.   
     
     
         17 . The tangential thread rolling head according to  claim 16 , wherein the means for adjusting a pivot position of the rolling head arms on the rolling head holder comprises a spring.