Description and classification of the role of needle piercing

When Piercing needle is a billet for brass forging

parts Extrusion bronze casting on sale

and to identify products within Brass forging the perforation hole size tool. Perforated

pipe inner surface of the needle in the quality assurance plays a decisive role. Needle

piercing the general circular cross-section for the production of pipe, pipe, and

gradually shaped cross section profiles. Piercing needle structure and brass forging

extrusion methods of operation and selection of product requirements.

Column part perforated cylindrical needle work, and its cross section round, shaped

and so on. Needle along the needle axis of column has a small taper, in the extrusion

process, the stationary perforated needle,sanitary

ware fittings only the front end with a tapered needle; and follower wearPin hole,

you need the entire length of the work of a very small taper to reduce the needle by the

tensile stress, increase their service life, while helping to squeeze from the hollow

material after the exit,sanitary ware fittings the hollow needle of the taper should be

based on material thickness negative deviation limit. General Extruder pin hole on the

work of some 550 ~ 600mrn length of the taper to make 0.5 ~ 0.6mm. This taper is not too

large, otherwise it will lead to changes in the size extrusion products.

Section size from the hollow needle piercing the hole size to determine material, needle

length equal to the work part of the Ingot length, spacer thickness, length and mode of

work with a piercing needle sanitary ware fittings out of work and with the length.

Bottle piercing needle structure in two parts: the needle and the needle sizing part

of the body, when the squeeze in the hole is less than 20 ~ 30mm thick-walled tube,

column piercing needle vertical perforation due to bending and heat, will piercing

billets incorrect or pulled fine, pull off, this case can be bottle piercing needle.

Extruded aluminum alloy, the surface of the column is often squeezed needle scratch pad,

affecting the surface quality, so it is with a bottle needle. But the diameter of the

needle and the needle body can not be too bad, depending on pipe diameter needle

diameter, the general diameter of the needle body 50 ~ 60mm or more thick, needle and

needle cone angle of the transition body 30 º ~ 50 º, the difference between the diameter

of the needle length is 0.2 ~ 0.3mm. Typically, the needle of assembly-type as well, but

the high temperature alloy extrusion with the overall style is appropriate, because the

high temperature deformation fabricated difficult to remove the thread.

Perforated by a needle the diameter of the inner diameter of the pipe to determine

the needle length equal to the sizing part of the model with the length of the work, with

the length of the work out mode and the margin of and. This allowance can not exceed more

than the thickness of pressure, usually 20 ~ 30mm, so as not to squeeze the hollow metal

rod in the back of people. Working out with a long needle desirable l0mm, so the holes on

the mold from the guide tube to prevent the elbow.

Piercing needle or a needle, whether bottle-pin column, which connecting rod with the

needle seat general use fine thread, the drawback is slow and difficult working needle,

and advanced mechanical handling extruder is used.

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