Spline pin shaft cold heading device and its production process

Abstract

The invention discloses a spline pin roll cold heading device. The spline pin roll cold heading device comprises a feeding mechanism, a cut-off mechanism, a conveying mechanism and four dies, wherein the position of the feeding mechanism corresponds to the position of the cut-off mechanism; the conveying mechanism moves among the feeding mechanism and the four dies for conveying materials; the four dies include a first die, a second die, a third die and a fourth die, wherein the first die is used for pre-forming a quadrangle tail end; the second die is used for forming a cylindrical rod part and the quadrangle tail end; the third die is used for positioning and forming rise angle of the quadrangle tail end, forming chamfer and forming the shape of a flange; the fourth die is used for forming special-shape spline teeth, forming key slots, forming the size of the flange and carrying out fine heading on the quadrangle tail end; the four dies are arranged in sequence. The invention also discloses a process for producing a spline pin roll. According to the spline pin roll cold heading device, the forming speed is high, the machining procedures of the spline pin roll are simplified, the production efficiency is improved, the utilization rate of raw material is improved, and the production cost is reduced; the precision of the spline pin roll is also improved.

Description

technical field [0001] The invention relates to a spline pin shaft cold heading device and a process for producing a spline pin shaft by using the spline pin shaft cold heading device. Background technique [0002] At present, automobiles have been very popular as a means of transportation, and the spline pin shaft 6 is an important part for the lifting and lowering transmission of the window glass of heavy trucks. Please refer to Figure 6a to Figure 6d , the spline pin shaft 6 includes a four-cornered tail end 61, a cylindrical rod portion 62 with a flange 63 and a head with chamfers 66, and the head is provided with special-shaped spline teeth 65 and key grooves 68, said The key groove 68 is parallel to the quadrangular tail end 61 . A groove 64 is provided between the special-shaped spline tooth 65 and the cylindrical rod 62 , and an internal thread 67 is provided inside the special-shaped spline tooth 65 . [0003] The process for producing the spline pin shaft 6 in t...

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Problems solved by technology

[0003] The process for producing the spline pin shaft 6 in the prior art is to produce the spline pin shaft by CNC (numerical control machine tool) full machining, but the spline pin shaft 6 is produced by the CNC full machining production mode, and the utilization rate of raw materials is low , so the production cost is relatively large; and the keyway of the special-shaped spline tooth 65 and the four-corner tail end 61 have complicated processing procedures, the keyway 68 and the four-corner tail end 61 are difficult to accurately locate, the spline pin shaft 6 produced has low precision, and the production speed is only 100%. Two spline pin shafts 6 per minute, the production efficiency is too low

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