摘要:
In the manufacture of metal packaging cans metal sheet is deep-drawn and ironed to form a seamless tube (7) having a bottom (6) in one-piece therewith, and the tube (7) is cut transversely to remove excess material atthe end (15) remote from the bottom, This forms a cylindrical body and bottom (A) of a two-piece can. To minimise waste of material and to make possible the manufacture of a thin-walled three-piece can, the method includes cutting the deep-drawn and ironed tube (7) transversely at at least one location (16) intermediate the bottom (6) and the end (15) remote from the bottom (6) so that, from the tube, there are formed a cylindrical body and bottom of (A) a two-piece can and at least one cylindrical body (B) of a three-piece can. Suitably, the tube (7) is shaped by the deep-drawing and ironing so as to have a lesser wall-thickness at regions (8,10) corresponding to the side-walls of the cans and a greater wall-thickness at regions (9,11) which correspond to the flange portions of the cans.
摘要:
A blank tube constituting a main frame for a two-wheeled vehicle, comprises a main tubular portion having thicker walls in the proximity of its ends subjected to the largest forces and tubular expanded portions extending from the ends of the tube for receiving a head tube and a seat tube without using separate parts such as lugs. The blank tube further comprises a gradually enlarged diameter portion adjacent to the tubular expanded portions to more improve the strength of the tube. The thicker walls, tubular expanded portions and gradually enlarged diameter portion are formed simultaneously in dies by bulging Moreover, the dies are formed with recesses, so that the blank tube is formed with protrusions. The protrusions are formed with apertures for passing brake wires or electric wires through the tube. The main tubular portion of the blank tube is formed in a particular cross-section effectively increasing its strength by pressing by means of the dies including corresponding sectional cavities.
摘要:
The invention relates for a method for partial hardening of an austenitic steel by utilizing during cold deformation the TWIP (Twinning Induced Plasticity), TWIP/TRIP or TRIP (Transformation Induced Plasticity) hardening effect. Cold deformation is carried out by cold rolling on at least one surface (2,3;12) of the material (1,11) to be deformed with forming degree (Φ) at the range of 5 ≤ Φ ≤ 60 % in order to achieve in the material (1,11) at least two consecutive areas (5,7;14,16) with different mechanical values in thickness, yield strength R p0.2 , tensile strength R m and elongation having a ratio (r) between ultimate load ratio ΔF and the thickness ratio Δt at the range of 1.0 > r > 2.0, and which areas are mechanically achieved to connect to each other by a transition area (6;15) which thickness is achieved variable from the thickness (t1,t3) of the first area (5,14) in the deformation direction (4,13) to the thickness (t2,t4) of the second area (7,16) in the deformation direction (4,13). The invention also relates to the use of the cold deformed product.
摘要:
Die Erfindung betrifft einen Container umfassend Träger 2 und Verkleidungen 3, wobei zumindest ein Element von den Trägern 2 und Verkleidungen 3 aus Blech mit einer variablen Blechdicke über einer längsten Länge des Elements hergestellt ist. Die Erfindung betrifft ferner ein Verfahren zur Herstellung eines solchen Containers 1.