摘要:
Rolls for molding a square tube and a method and a device for rollingly molding the square tube capable of manufacturing the square tube having accurate dimensions and shape and having excellent internal quality at low cost by rollingly molding a circular tube to the square tube with shared rolls without imparting excessive load on a raw material at predicted portions for corner parts and shoulder parts. The radius of curvature of the surface of the molding roll in the axial direction is formed so that the linearization of the portions (predicted shoulder portions of the raw tube) adjacent to the predicted corner portions of the square tube can be performed in preference to the other portions (other predicted side part portions) of the raw tube. For example, a stand formed of four-side rolls is disposed on the upstream-most side and downstream-most side molding roll stands, and a stand formed of two-right and left side rolls is disposed therebetween. Since the molding roll formed to have the radius of curvature constricting the portion of the raw tube forming the shoulder parts adjacent to the corner parts of the square tube smaller than that constricting the portion of the raw tube forming the side part center of the square tube in cross section is adopted, an optimum balance can be kept between a roll sharing effect and an equipment cost, and the square tube excellent in quality can be manufactured at low cost with the shared roll.
摘要:
A method includes providing a shaft (14) having a coupling section (36). The coupling section (36) has a generally cylindrical exterior surface. The method includes applying a coating (24) to the coupling section (36) to form an engaging surface (35). The method further includes cold-forming the shaft (14) and the coating (24) such that a plurality of protrusions (37) is formed in the engaging surface (35). The cold-forming of the shaft (14) and the coating (24) is performed contemporaneously.
摘要:
A method of forming a cold diametrally reducing roll for metal pipe and a metal pipe formed by the method; the method, characterized by comprising the steps of pre-forming an original pipe formed of a metal pipe to a metal pipe having an elliptic, elongated, or rectangular cross section by a pre-forming roll and forming the pre-formed metal pipe by diametrally reducing the outer peripheral length thereof to less than the outer peripheral length of the original pipe while re-forming the cross sectional shape of the pre-formed metal pipe to a circular shape or the other cross sectional shape different from the cross sectional shape of the pre-formed metal pipe by using a cold diametrally reducing roll disposed on the downstream side of the pre-formed roll.
摘要:
Felge (1) für ein Rad mit einem ersten Abschnitt einer ersten Materialstärke (a) und einem zweiten Abschnitt (14) einer zweiten Materialstärke (b), die geringer als die erste Materialstärke ist. Die Felge soll so ausgestaltet werden, daß die Felge gegenüber herkömmlichen Felgen eine Gewichtsreduzierung bei gleicher oder höherer Betriebsfestigkeit aufweist. Das wird dadurch erreicht, daß der zweite Abschnitt (14) Sicken (143) zur Vergrößerung der Formstabilität aufweist.
摘要:
A container embossing apparatus (10) includes a container-supporting embossing mandrel (30) that has circumferentially spaced, axially-extending ribs (44) on the periphery that are engageable with a resilient forming mandrel or member (50) so that crease lines are formed on the container during the embossing operation.
摘要:
An einem Revolver (30), der um eine zentrale Achse (A) drehantreibbar ist, sind mehrere Spreizdorne (43) rings um die zentrale Achse (A) angeordnet. Sie sind im wesentlichen zusammengesetzt aus je einem Stützkörper (44), der am Revolver (30) befestigt ist und eine Spreizdornachse (B) definiert, mehreren Segmentstangen (52), die rings um die Spreizdornachse (B) angeordnet und am Stützkörper (44) radial verstellbar geführt sind, sowie einem Keil (70), der zum Auseinanderspreizen der Segmentstangen (52) längs der Spreizdornachse (B) verschiebbar ist. Die Keile (70) sind mit einem gemeinsamen Betätigungsglied während einer Umdrehung des Revolvers (30) nacheinander verschiebbar. Das Betätigungsglied ist ein zentraler Kurvenkörper (18), an dem sich jeder der Keile (70) mindestens während eines dem Abstand zwischen zwei benachbarten Spreizdornen (52) entsprechenden Teils jeder Umdrehung des Revolvers (30) abstützt.
摘要:
Apparatus (22,22') for forming thin-wall sleeves (24) is disclosed as including a spring biaser (52) for tools (48) of the apparatus. A mandrel (36) and a tool housing (42) cooperate to mount the sleeve (24) for forming under the impetus of an actuator (54) that moves the tools (48) against the force of the spring biaser (52). Upon such tool movement, forming ends : (50) of the tools form the sleeve (24) into circumferentially spaced recesses (40) of the mandrel to provide sleeve splines or teeth (56). The spring biaser (52) preferably includes a plurality of springs (92) mounted within associated spring openings (98) in the tool housing between tool slots (46) in which the tools (48) are supported for movement. in one embodiment, the forming is performed inwardly with the sleeve mounted about an internal mandrel. In another embodiment, the forming is performed outwardly with the sleeve mounted within an external mandrel.