Year1
- 材质：
- 10#
- 标准：
- GB8162
Using precision seamless tubes to manufacture mechanical structures or hydraulic equipment can greatly save machining hours, improve material utilization, and at the same time help improve product quality.
Small-diameter seamless pipes can be divided into hot-rolled pipes
, cold-rolled pipes
, cold-drawn pipes
, extruded pipes, etc. according to different production methods.
Hot Rolled seamless pipes are generally produced on an automatic pipe rolling unit.
The solid tube blank is inspected and surface defects are removed and cut into the required length.
The perforated end of the tube blank is centered on the end face
Then Send to the heating furnace for heating
Punch holes on the punch
Continuously rotate and advance while piercing,
Under the action of the roller and the head,
A cavity is gradually formed inside the tube blank, called a gross pipe. ,
Then sent to the automatic pipe rolling machine for continued rolling, and finally the wall thickness is evened by the leveling machine,
and sized by the sizing machine,
to meet the specification requirements,
using continuous rolling The production of hot-rolled seamless steel pipes by pipe mills is a more advanced method.
If you want to obtain seamless pipes with smaller sizes and better quality,
cold rolling
cold drawing or both must be used The combined method of cold rolling is usually carried out on a two-roll mill. The small-diameter seamless pipe is rolled in an annular pass composed of a variable cross-section circular hole groove and a fixed conical plug.
Cold drawing is usually carried out on a two-roll mill. It is carried out on a single chain or double chain cold drawing machine.
The extrusion method is to place the heated tube blank in a closed extrusion cylinder. The perforated rod and the extrusion rod move together,
to make the extrusion The parts are extruded from smaller die holes. This method can produce steel pipes with smaller diameters.
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