Metal deforming – By extruding through orifice – Expressing non-uniform cross-section or non-linear product
Patent
1990-03-08
1991-02-12
Spruill, Robert L.
Metal deforming
By extruding through orifice
Expressing non-uniform cross-section or non-linear product
72266, 72370, 2989335, 2989336, B21C 2314, B21C 2508
Patent
active
049914219
ABSTRACT:
An elongated, rod-like rack for use in an automotive-type steering gear assembly and like mechanisms, is formed of an elongated extruded tube divided lengthwise into a substantially solid rack portion and a substantially hollow, link portion. Transversely extending teeth are broached on the rack portion for engagement with a drive pinion and the like for transmitting power through the rack. The rack is formed by positioning a tubular blank within an open ended extrusion die having an extrusion throat and partially pushing the tubular blank through the throat for extruding the material longitudinally and collapsing radially inwardly top form a substantially solid, elongated rack portion. Then, extrusion is continued with a punch having a mandrel arranged within the blank and within the die throat for extruding a thin wall length, forming the hollow, integral link part of the rack. The trailing end may be terminated in an inwardly extending, thick wall portion suitable for forming threads thereon. The elongated rack part has a fine, axially extending opening along its length resulting from a space left when the material is inwardly collapsed in the die throat for providing a communication passageway.
REFERENCES:
patent: 362623 (1887-05-01), Heiss
patent: 2452628 (1948-11-01), Bartlett et al.
patent: 4292831 (1981-10-01), Simon
patent: 4561274 (1985-12-01), Kumekawa et al.
patent: 4598451 (1986-07-01), Ohki
LandOfFree
Method for extruding an elongated, lightweight rack does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for extruding an elongated, lightweight rack, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for extruding an elongated, lightweight rack will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-12752