A method is used to manufacture a drawn tube having a hollow low interior for housing an axle shaft. The method includes the steps of placing a billet into a first die assembly and pressing the billet into the first die to producing a pre-formed billet. The method also includes the steps of moving the pre-formed billet from the first die assembly to a second die assembly and pressing the pre-formed billet into the second die assembly to produce an extruded tube. The method further includes the steps of moving the extruded tube from the second die assembly to a third die assembly and pressing the extruded tube into the third die assembly to further elongate the extruded tube and decrease the thickness of the wall of the extruded tube to of from about 3 to about 18 millimeters to produce the drawn tube having the yield strength of at least 750 MPa.

A method is used to manufacture a drawn tube having a hollow low interior for housing an axle shaft. The method includes the steps of placing a billet into a first die assembly and pressing the billet into the first die to producing a pre-formed billet. The method also includes the steps of moving the pre-formed billet from the first die assembly to a second die assembly and pressing the pre-formed billet into the second die assembly to produce an extruded tube. The method further includes the steps of moving the extruded tube from the second die assembly to a third die assembly and pressing the extruded tube into the third die assembly to further elongate the extruded tube and decrease the thickness of the wall of the extruded tube to of from about 3 to about 18 millimeters to produce the drawn tube having the yield strength of at least 750 MPa.

A method for manufacturing a bicycle front fork having a wheel clamping base. The method includes the steps of extruding an aluminum alloy substrate having three rectangular bars, wherein the two of the rectangular bars have assembling segments; cutting the substrate for a blank and placing it into a mold for forging the three rectangular bars into three round bars; placing the blank into another mold for extruding and punching the three round bars to have guide holes; drilling the round bars along the guide holes to form three round tubes; flattening and shrinking openings of two of the three round tubes; molding the assembling segments; downwardly bending the two round tubes having the assembling segments into two fork tubes of a bicycle front fork; punching the assembling segments into locking connection portions for a clamping base of the bicycle front fork.

[Problem] To present a small-diameter magnesium base alloy tube and its manufacturing method of long length, high dimensional precision, and excellent mechanical properties.

[Solving Means] A raw material 1 of aluminum base alloy is extruded and formed by using a forming pattern comprising an upper pattern 2 having plural through-holes 21 for supplying the raw material into diaphragms of equal angles on the circumference and circular cylindrical protrusions 22 positioned in the center of plural through-holes 21 so as to be surrounded by plural through-holes 21 at the exit side of the through-holes 21, and a lower pattern 3 positioned in the concave portions commonly penetrating at the exit of the plural through-holes 21 of the upper pattern 2, having through-holes 32 for inserting the protrusions of circular circumference of the upper pattern by providing a tube forming gap, positioned in the center of concave portions 31 of the concave portions 31 in the circular columnar shape of the upper pattern 2.

Metal is extruded through a feeder plate and an extrusion die to form a heat pipe component that includes a length of pipe and a flange extending outward from the pipe along the length of the pipe. A section of the flange is removed from the extruded heat pipe component, the pipe is sealed and compressed to reduce its thickness and form a heat pipe element for a computing system.

Tread members for climbing products are described herein that have indented treads that may provide enhanced grip and/or improved slip resistance. The treads are formed on a standing or other engagement surface of the tread member. In some approaches, the treads may be incorporated into an upper surface of a rung, step, platform, or plank of the climbing product. The treads include a plurality of pips or ridges extending across the tread member in a first direction. The first direction may be an extrusion direction or a lateral direction. The pips or ridges may provide slip resistance in a direction perpendicular to the first direction. The pips or ridges further have a plurality of indentations or cuts formed therein at an angle of about 5 degrees up to about 90 degrees relative to the first direction. So oriented, the indentations may provide slip resistance in additional directions.

Tread members for climbing products are described herein that have indented treads that may provide enhanced grip and/or improved slip resistance. The treads are formed on a standing or other engagement surface of the tread member. In some approaches, the treads may be incorporated into an upper surface of a rung, step, platform, or plank of the climbing product. The treads include a plurality of pips or ridges extending across the tread member in a first direction. The first direction may be an extrusion direction or a lateral direction. The pips or ridges may provide slip resistance in a direction perpendicular to the first direction. The pips or ridges further have a plurality of indentations or cuts formed therein at an angle of about 5 degrees up to about 90 degrees relative to the first direction. So oriented, the indentations may provide slip resistance in additional directions.

An aluminium alloy including 1.0-1.5 wt % Mn, up to 0.1 wt % Mg, up to 0.3 wt % Si, up to 0.3 wt % Fe, up to 0.1 wt % Cu, up to 0.25 wt % Cr, up to 0.1 wt % Ni, up to 0.3 wt % Zn, up to 0.1% Ti, up to 0.2 Zr. The allow also includes impurities, each no more than 0.05 wt. % and wherein the total of impurities is no more than 0.15 wt. %, with the balance being aluminum.