摘要:
A method for simultaneously forming splines and an annular groove in a metal piece having a central portion and ends on each side thereof, the method including the steps of forming a substantially U-shaped annular recess (56) along the central portion of the workpiece which has a flat base and spaced sidewalls which are spaced apart to a greater distance than the side walls of the groove (82) to be formed, deforming the recess (56) to initially form a groove (82) therein, progressively and simultaneously forming splines in the ends of the workpiece and forming the groove (82) in the recess of the workpiece, and moving metal outwardly and upwardly from the recess as the groove (82) is formed to fill the remainder of the recess (56) and form the sidewalls of the groove (82).
摘要:
A machine (10) for forming grooves and splines in workpiece (32) including a mounting assembly (26,28,34,36) defining a support axis for rotatably supporting the workpiece (32) for rotary movement about the axis, and dies (38,40;90,92) including opposed spline forming toothed work surfaces (46) spaced on opposite sides of the support axis for forming splines therein when the work surfaces (46) are moved relative to one another. Each of the dies (38,40;90,92) include a body portion (68) having an elongated straight slot formed therein transverse to the toothed work surfaces (46). A groove forming element (48) removably mounted in the slot simultaneously deforms the workpiece to form a groove as the toothed work surfaces (46) form spline in the workpieces. The groove forming element (48) has a constant width when viewed in transverse cross section and has a portion secured in the slot and a groove forming edge extending from the slot. The edge has leading portion and a trailing portion. The element progressively increases in height above the work surface from the leading portion (58) to the trailing portion (60). The edge becomes progressively squared in transverse cross section from the leading portion (58) to the trailing portion (60).
摘要:
A power transmission member (42), as well as apparatus (10,110,210) and method for forming the power transmission member (42) from a thin-walled blank. The apparatus (10,110,210) comprises a pair of opposed toothed dies (26,30;112,114;138,140). A toothed mandrel (40) is rotatably supported between the dies and received within the sleeve portion (46), flatly engaging an annular end wall (44) of the member. The dies (26,30;112,114;138,140) and mandrel (40) have chamfered surfaces (68,70), respectively, for forming a chamfered flange (66) on the power transmission member (42) as the toothed surfaces of the dies are relatively moved during the splining operation. A loading notch (122) is formed intermediately along the toothed work surfaces of each die member (112,114;138,140) for receiving a blank to be splined when the notches (122) are vertically aligned with one another in a neutral or loading position on opposite sides of the mandrel. Groups or rough (124,126,128) and finish (130,132) forming teeth are spaced along opposite sides of the notches (122 ), and progressively increase in height from group-to-group away from the notches. Initial opposed movement of the dies (112,114;138,140) from the loading position simultaneously engages opposing pairs of similar rough forming teeth (124,126,128) and the mandrel teeth (48) with the sleeve portion (46) therebetween, rough forming splines therein. The dies (112,114;138,140) are then moved in the reverse direction, simultaneously engaging opposed pairs of similar finishing teeth (130,132) and the mandrel teeth (48) with the sleeve (46) therebetween to finish forming the splines (64) therein. Opposed rows of raised synchronizing teeth (142) respectively extend along the toothed work surfaces of the dies and mandrel and are spaced inwardly therefrom, meshing together to rotate the mandrel and coordinate the relative movement of the dies and mandrel during a splining operation.
摘要:
A method and apparatus (12) for cold sizing a round workpiece (14) having round surfaces of cylindrical shapes that are coaxial about a central axis A of the workpiece and have different diameters. A support (54,55) rotatably mounts the workpiece (14) about its central axis A between a pair of die assemblies (24a, 24b) which are spaced from each other. Each die assembly (24a,24b) includes a plurality of dies (56,58,60,62) that are respectively aligned with the round surfaces (46,48,50,52) of the workpiece (14). Movement of the die assemblies in opposite directions as each other engages sizing surfaces (66,68,70,72) of the dies with the aligned round surfaces of the workpiece to pressure size the workpiece surfaces. In one embodiment of the sizing apparatus (12), the die assemblies (24a, 24b) have elongated shapes and are moved rectilinearly in a parallel relationship to each other to perform the sizing. Another rotary embodiment of the sizing apparatus (12') includes rotary die assemblies (24a',24 b') mounted by associated spindles (85) whose rotation likewise pressure sizes the round workpiece surfaces. Both embodiments of the sizing apparatus are disclosed as including forming productions for forming projections such as splines (82) and/or a helical thread (84) on the sized surfaces of the workpiece.
摘要:
A rack (12,14) for burnishing toothed gears (16) in cooperation with another like rack so as to provide accentuated axial crowns on the burnished teeth is disclosed as having a unitary body (42) of an elongated shape with leading and trailing ends (44,46) and a toothed forming face (48) extending between the ends. The toothed forming face (48) includes a leading section a of teeth that extend parallel to a mounting surface (54) of the rack body and at least one section of inclined teeth (50) preferably embodied by an intermediate section b and a trailing section c. A fixture (60) for grinding the inclined tooth sections b and c on a pair of cooperable racks (12,14) includes a pair of inclined support surfaces (66,68) and a clamp (70) for clamping the rack bodies during the inclined tooth grinding.
摘要:
A toothed rack (22) disclosed has a toothed forming face (24) of a novel construction for forming splines (42) in a thin-wall sleeve (36) of a power transmission member (28) by meshing of the rack and a toothed mandrel (26) with the sleeve therebetween to form the splines. The toothed forming face has leading, intermediate, and trailing tooth groups (40a, 40b, 40c) that perform the splining. The pitch line tooth thickness of the leading tooth group is at least equal to and preferably greater than the pitch line tooth thickness of the trailing tooth group which has an addendum of a greater height than the leading tooth group. The teeth of the intermediate tooth group have an addendum height that is shorter than the teeth of the trailing tooth group and preferably equal to the addendum height of the leading tooth group. The pitch line tooth thickness of the leading tooth group is equal to and preferably greater than the pitch line tooth thickness of the intermediate tooth group. The profile of the intermediate teeth from the tip to the root thereof is the same as the profile of the trailing teeth from the tip thereof toward the root thereof for the same distance. All of the teeth have faces defining the same pressure angle as each other.
摘要:
An apparatus (10) and die assembly (26, 30) for forming a splined power transmission member from a thin-walled blank. The apparatus (10) comprises a pair of die assemblies (26, 30), each including a supporting frame (28), first (42) and second (44) die bodies independently mounted on the supporting frame (28) in end-to-end coaxial relationship with each other, with rough (46) and finish (48) spline-forming surfaces formed on the first (42) and second (44) die bodies, respectively. The pair of die assemblies (26, 30) are supported with the spline-forming surfaces of the respective die bodies (42, 44) in spaced, oppoosed, parallel relationship to each other. A power drive mechanism sequentially moves the pair of die assemblies (26, 30) in opposed directions. The power drive means effectuates a rough spline-forming stroke and then returns the die assemblies (26, 30) to the neutral position.
摘要:
An apparatus (10) and die assembly (26,30) for forming a splined power transmission member from a thin-walled blank. The apparatus (10) comprises a pair of die assemblies (26,30), each including a supporting frame (28), first (42) and second (44) die bodies independently mounted on the supporting frame (28) in end-to-end coaxial relationship with each other, with rough (46) and finish (48) spline-forming surfaces formed on the first (42) and second (44) die bodies, respectively. The pair of die assemblies (26,30) are supported with the spline-forming surfaces of the respective die bodies (42,44) in spaced, opposed, parallel relationship to each other. A power drive mechanism sequentially moves the pair of die assemblies (26,30) in opposed directions. The power drive means effectuates a rough spline-forming stroke and then returns the die assemblies (26,30) to the neutral position. Subsequently, there is a finish spline-forming stroke and then return to the neutral position.
摘要:
An apparatus for forming splines in a first portion (22) of a shaft (13) of a workpiece (12) and a thread in a second portion (24) of the shaft (13) which has a smaller cross sectional diameter than the first portion (22), the apparatus including supports (26,28) for rotatably supporting the shaft (13) about the longitudinal axis A thereof and a pair of forming assemblies (36,36',38,38') mounted for movement with the workpiece (12) therebetween. The apparatus (10) is characterized by the forming assemblies (36,36',38,38') including oppositely opposed dies for simultaneously forming the splines in the first portion (22) of the shaft (13) having the larger cross sectional diameter and threads in the second portion (24) having the smaller cross sectional diameter in a single pass of the dies over the shaft (13). A method for forming the splines and threads includes the steps for supporting the shaft (13) for rotation about the center longitudinal axis A thereof between a pair of forming assemblies (36,36',38,38') mounted for movement with the shaft (13) therebetween and moving the forming assemblies (36,36',38,38') to form splines in the first portion (22) of the shaft (13) while simultaneously forming a thread in a second portion (24) of the shaft (13).
摘要:
A rack (12,14) for burnishing toothed gears (16) in cooperation with another like rack so as to provide accentuated axial crowns on the burnished teeth is disclosed as having a unitary body (42) of an elongated shape with leading and trailing ends (44,46) and a toothed forming face (48) extending between the ends. The toothed forming face (48) includes a leading section a of teeth that extend parallel to a mounting surface (54) of the rack body and at least one section of inclined teeth (50) preferably embodied by an intermediate section b and a trailing section c. A fixture (60) for grinding the inclined tooth sections b and c on a pair of cooperable racks (12,14) includes a pair of inclined support surfaces (66,68) and a clamp (70) for clamping the rack bodies during the inclined tooth grinding.