Frog, and method for producing wing rails for a frog

Abstract

A frog ( 10 ) and to a method for producing such a frog, comprising wing rails ( 16, 18 ) each having at least one railhead ( 62, 64 ) and one rail web ( 66, 68 ), and comprising a frog point ( 12 ) arranged movably between the wing rails, wherein, in the region of the frog point, a wheel transfer zone extends between the frog point and the wing rail with which the frog point is in contact. Separately from the frog point ( 12 ), each wing rail ( 16, 18 ) has a portion ( 20, 22 ) which extends at least over the length of the wheel transfer zone and which is made from a forged block.

1 . A frog ( 10 ) comprising:
 wing rails ( 16 ,  18 ), which comprise at least a rail head ( 62 ,  64 ) and a rail web ( 66 ,  68 ), and further comprises a frog tip ( 12 ) adjustably arranged between the wing rails, whereby in the area of the frog tip extends a wheel transfer zone between the frog tip and the wing rail,   wherein the wing rails ( 16 ,  18 ) are detachably connected to each other, and in that each wing rail ( 16 ,  18 ) comprises or consists of a wing rail section ( 20 ,  22 ) that is produced from a forged block and extends separately from the frog tip ( 12 ) at least along the length of the wheel transfer zone.   
     
     
         2 . The frog according to  claim 1 , wherein area moments of inertia (I x , I y ) in cross-sections extending vertically relative to the longitudinal axis of the wing rail sections ( 20 ,  22 ) at least in the region of the contact surface of the frog tip ( 12 ) to the wing rail section ( 20 ,  22 ) are equal or substantially equal, and deviate from each other by a maximum of ±20%, in particular by a maximum of ±10%. 
     
     
         3 . The frog according to  claim 1 , wherein corresponding to the mass of material in an area of the wing rail section ( 20 ,  22 ) that results in the area from a change of the geometry relative to the basic geometry of the wing rail section, equivalent material mass is removed or remains in excess in the area of changed geometry in order to achieve an equal or substantial equal area moment of inertia. 
     
     
         4 . The frog according to  claim 1 , wherein the contact surface from the point area of the frog tip ( 12 ) to the wing rail section ( 20 ,  22 ) is a section of an area ( 80 ) recessed relative to the wing rail section's running edge, such as a milled cutout, in the flank ( 60 ) of the wing rail section, whereby preferably corresponding to the mass of the material removed to form the recessed region ( 80 ), excess material remains on the wing rail section, in particular at the side of the wing rail section ( 20 ,  22 ) that faces away from the frog tip. 
     
     
         5 . The frog according to  claim 1 , wherein the running edge course of the frog tip ( 12 ) merges with the basic track trajectory defined by the running edge of the section ( 20 ,  22 ) at a distance E from the functional frog tip ( 112 ), with 80 mm≤E≤150 mm. 
     
     
         6 . The frog according to  claim 1 , comprising an anti-derail device originating from the wing rail ( 16 ,  18 ), in whose frontmost area ( 104 ) the frog tip ( 12 ) is adjustably arranged, wherein the anti-derail device is integrally machined from the block. 
     
     
         7 . The frog according to  claim 6 , wherein the anti-derail device is embodied integrally in the first distance blocks ( 108 ), via which the wing rail sections ( 20 ,  22 ) are supported against and connected to each other. 
     
     
         8 . The frog according to  claim 6 , wherein in one piece with the wing rail sections ( 20 ,  22 ) are machined from the blocks the first distance blocks ( 108 ), each of which possesses one cutout ( 106 ) whereby in the assembled wing rail sections the cutouts merge to form an open chamber, in which the frontmost region ( 104 ) of the frog tip ( 12 ) is adjustably arranged. 
     
     
         9 . The frog according to  claim 1 , wherein the frog tip ( 12 ) comprises an in particular cuboid base body ( 54 ) with, originating from the latter, a tip body ( 56 ) with a triangular cross-section, and in that the width B of the base body is B>60 mm, in particular B>70 mm, preferably 75 mm≤B≤85 mm. 
     
     
         10 . The frog according to  claim 1 , comprising at least one passage opening for a rod element ( 100 ,  102 ), such as a locking rod or detector rod, that is embodied in the web ( 66 ,  68 ) of the wing rail ( 16 ,  18 ), wherein the web ( 66 ,  68 ) of the wing rail section ( 20 ,  22 ) at least in the area of the passage opening ( 96 ,  98 ) has a thickness D with D>30 mm, in particular D>40 mm, especially preferably 40 mm≤D≤60 mm, very especially preferably 45 mm≤D≤50 mm. 
     
     
         11 . The frog according to  claim 1 , wherein in the transition region between the frog tip ( 12 ) and the wing rail section ( 20 ,  22 ) a cant is produced from the block by metal cutting processing. 
     
     
         12 . The frog according to  claim 1 , wherein outside of the frog tip ( 12 ) the wing rail sections ( 20 ,  22 ) are supported against each other via second distance blocks ( 32 ,  34 ) machined as one piece with the wing rails from the block. 
     
     
         13 . The frog according to  claim 1 , wherein the wing rail section ( 20 ,  22 ) is machined from the block in such a manner that in regions where the geometry of the wing rail section deviates from its basic geometry, such as a cant or the region ( 80 ) recessed relative to the running edge ( 85 ), corresponding to the mass of material that results from the change of geometry, equivalent material mass in an adjacent area of the wing rail section is removed or remains in excess relative to the basic geometry. 
     
     
         14 . A method for producing wing rails ( 16 ,  18 ) for a frog ( 10 ) with a movable frog tip ( 12 ), wherein at least one section ( 20 ,  22 ) of each of the wing rails ( 16 ,  18 ) is produced from a forged steel block by metal cutting processing, whereby a cant of the running surface is machined out in a region, in which the frog tip ( 12 ) contacts the wing rail section ( 20 ,  22 ). 
     
     
         15 . The method according to  claim 16 , wherein an anti-derail device for the frog tip ( 12 ) is machined from the block as one piece with the wing rail section ( 20 ,  22 ). 
     
     
         16 . The method according to  claim 14 , wherein in the flank ( 58 ,  60 ) of the wing rail section ( 20 ,  22 ) extending on the frog tip side is machined out of the block a region ( 80 ) that is recessed relative to the running edge ( 85 ) and that provides a contact surface for the frog tip ( 12 ,  112 ). 
     
     
         17 . The method according to  claim 14 , wherein the wing rail section ( 20 ,  22 ) is machined from the block in such a manner that in areas where the geometry of the wing rail section deviates from its basic geometry, such as cant or the region ( 80 ) recessed relative to the running edge ( 85 ), corresponding to the mass of the material that results from the change in the geometric course, equivalent material mass in an adjacent area in the wing rail section is removed or remains in excess relative to the basic geometry, so that the moment of inertia of the wing rail section remains unchanged or substantially unchanged. 
     
     
         18 . The method according to  claim 14 , wherein the wing rail section ( 20 ,  22 ) is machined from the block in a manner so that the area moments of inertia along cross sections extending vertical to the longitudinal axis of the wing rail section at least in the region of the contact surface of the frog tip ( 12 ) to the wing rail section are equal or substantially equal, and differ from each other by a maximum of ±20%, in particular a maximum of ±10%.