Pay-off reel Tension reel Mandrel of the main structure form The
mandrel is the key part of hot rolling tension reel for coils.
Coiling temperature is between **0 to **0 oC . The mandrel has
mainly two types: link wedge type and double wedge
type.
Unk wedge type can also be divided into two kinds: link wedge
coupling drive and link wedge-spline drIve.
For link wedge-coupling type tension reel, the mandrel is mainly
composed of rnandrel body, spreader bar, segment, link, wedge and
spreading cylinder Spreader bar has multistage slopes and segment
is supported by multistage wedge Segment is connected with
spreader bar by link so segment does not drop off With
compression spring in the middle of wedge, wedge can firmly
contact segment and pyramid surface. There is a gap between the
upper surface of wedge and segment, which can reduce the impact
of coil head to mandrel during coiling coil. Mandrel body is
installed on two bearings. Power is transmitted by crowned-teeth
coupling in the rear. It is very convenient to dismantle, and due
to there is no gear impact during working. mandrel rigidity is
improved. lt s very beneficial to control the dynamic
tension.
The spreadding principle of mandrel: spreader bar moves inside
mandrel body in axial direction driven by hydraulic cylinder, the
slant of spreader bar pushes the wedge inside radial hole of
mandrel body to move outward The wedge upper surface pushes
segment to expand outward Wedge diameter will expand After
coiling coils, preader bar moves in the opposite direction driven
by hydraulic cylinder, and pulls segment inward to shrink through
link Wedge moves inward and mandrel diameter becomes smaller to
discharge state Then you can begin to discharge coil. The mandrel
is the key part of hot rolling tension reel for coils. Coiling
temperature is between **0 to **0 oC . The mandrel has mainly two
types: link wedge type and double wedge type.
Unk wedge type can also be divided into two kinds: link wedge
coupling drive and link wedge-spline drIve.
For link wedge-coupling type tension reel, the mandrel is mainly
composed of rnandrel body, spreader bar, segment, link, wedge and
spreading cylinder Spreader bar has multistage slopes and segment
is supported by multistage wedge Segment is connected with
spreader bar by link so segment does not drop off With
compression spring in the middle of wedge, wedge can firmly
contact segment and pyramid surface. There is a gap between the
upper surface of wedge and segment, which can reduce the impact
of coil head to mandrel during coiling coil. Mandrel body is
installed on two bearings. Power is transmitted by crowned-teeth
coupling in the rear. It is very convenient to dismantle, and due
to there is no gear impact during working. mandrel rigidity is
improved. lt s very beneficial to control the dynamic
tension.
The spreadding principle of mandrel: spreader bar moves inside
mandrel body in axial direction driven by hydraulic cylinder, the
slant of spreader bar pushes the wedge inside radial hole of
mandrel body to move outward The wedge upper surface pushes
segment to expand outward Wedge diameter will expand After
coiling coils, preader bar moves in the opposite direction driven
by hydraulic cylinder, and pulls segment inward to shrink through
link Wedge moves inward and mandrel diameter becomes smaller to
discharge state Then you can begin to discharge coil.
