Mandrel of Pay-off Reel and Stress Reel
For scorching rolling
The mandrel is the important element of sizzling rolling rigidity reel for coils&period of time Coiling temperature is between 550 to 850ºC&time period The mandrel has mostly two kinds&colon link wedge sort and double wedge kind&period
Link wedge sort can also be divided into two kinds&colon website link wedge-coupling drive and hyperlink-spline push&period
For website link wedge-coupling variety rigidity reel&comma the mandrel is largely composed of mandrel human body&comma spreader bar&comma segment&comma url&comma wedge and spreading cylinder&period Spreader bar has multistage slopes and phase is supported by multistage wedge&period Segment is related with spreader bar by hyperlink so phase does not fall off&interval With compression spring in the center of wedge&comma wedge can firmly contact segment and pyramid floor&time period There is a gap in between the higher surface area of wedge and segment&comma which can reduce the affect of coil head to mandrel throughout coiling coil&interval Mandrel human body is set up on two bearings&period Energy is transmitted by topped-teeth coupling in the real&time period It is quite handy to dismantle&comma and thanks to there is no equipment impact throughout functioning&comma mandrel rigidity is enhanced&period of time It’s extremely useful to manage the dynamic tension&period
The spreading theory of mandrel&colon spreader bar moves within mandrel human body in axial course dreivern by hydraulic cylinder&comma the slant of sperader bar pushes the wedge inside of radial gap of mandrel entire body to go outward&period The wedge surface area pushes phase to expand outward&period Wedge diameter will increase&time period Soon after coiling coils&comma spreader bar moves in the reverse route pushed by hydraulic cylinder&comma and pulls section to shrink via hyperlink&period Wedge moves inward and mandrel diameter turns into more compact to discharge condition&period Then you can commence to discharge coil&interval
For the two kinds of url wedge-coupling travel and url wedge-spline generate&comma the mandrel structures and principles are almost very same and the main difference is push variety of mandrel&interval For hyperlink wedge-spline drive variety&comma relationship in between mandrel and major transmission instances is spline&comma i&periode&interval insert sort&time period When mouting and dismantling&comma mandrel can be right inserted or pulled out of the major transmission cases to attain the rapid alternative&time period
The major driving motor drives gear shaft rotation via the intermediate shaft&interval The equipment shaft dirves large equipment rotation&comma and the huge equipment drives mandrel rotation by way of spline&interval
For the double wedge kind rigidity reel&comma the mandrel is mainly composed of mandrel physique&comma spreader bar&comma segment&comma spreader wedge&comma buffer wege and hyd&period of time Cylinder&interval
The spreading theory of double wedge type mandrel&colon hyd&period Cylinder tends to make spreader bar shift back and forth in axial route and the wedge go in radical course&period So the section turns into big&period of time T-hook on spreader bar pulls wedge back and the hook outside the wedge pulls phase back again&time period This will make the manderel tiny&time period With spline connectiion for power transmission unit&comma mandrel can be swiftly replaced&interval Cooling water channel inside of the mandrel&comma so cooling impact is excellent&interval Lubricant can be injected by vehicle and manual kind&comma so it can minimize parts wear&time period
Shell out-off reel and stress reel for cold rolling coils are utilised in cold rolling creation line or shell out-off when acid pickling&commagalvanization&commaannealing&commashear&commacoating or coil tension in out permit&interval
Cold rolling mandrel is the important part of shell out-off reel and pressure reel&interval According to diverse composition&comma it has beam wedge variety&comma pyramid axis type&comma pyramid sleeve kind&comma wedge type&comma radial direction hydraulic cylinder variety&comma and so on&time period Or basically&comma open type and near variety&interval The close sort mandrel is a near circle CZPT gap in the floor following growing&periodit is suited for coiling slender strip steel&interval The open sort mandrel indicates there is a gap in between segments after mandrel increasing&comma suitable for coiling thicker strip metal&period
For chilly rolling
Pay-off reel and rigidity reel for cold rolling coils are utilized in chilly rolling production line or shell out-off when acid pickling&comma gavanization&comma annealing&comma shear&comma coating or coil stress in outlet&period
Cold rolling mandrel is the important components of pay out-off reel&stress reel&interval According to diverse composition&comma it has beam wedge variety&comma pyramid axis sort&comma pyramid sleeve variety&comma wedge sort&comma radial path hydraulic cylinder variety&comma ect&period of time Or basically&comma open kind and close variety&period The shut sort mandrel is a close circle CZPT gap in the surface right after increasing&period of time It is suitable for coiling skinny strip metal&time period The open type mandrel signifies there are a gap in between phase following mandrel increasing&comma suitable for coiling thicker strip metal&period
The beam wedge type mandrel is largely composed of the major shaft&comma expanding core&comma phase&comma axial direction wedge&comma radial direction wedge and spreading cylinder&comma etc&period There are two kinds of structure&colon with jaw or CZPT jaw&period The mandrel with jaw is employed for coiling thicker strip metal&interval It can also be set with steel sleeve or paper sleeve to coil with belt wrapper&period of time The mandrel CZPT jaw is used for coiling skinny strip steel by belt wrapper&period
The mandrel will move alongside axial route driven by the increasing main & wedge block&comma through relative sliding between the wedge block and phase&comma swelling and shrinking will take place in radial path&comma reset by spring&period
The pyramidal axis variety mandrel is divided into tapper type and back taper type in accordance to the tilting path of axis slope&time period This mandrel has straightforward construction &commaless elements&comma large primary shaft section and higher toughness &periodSo it can bear huge stress&comma not only coiling &commabut also uncoiling&interval There are two sorts of framework&colon with jaw or CZPT jaw &periodit’s primarily consisted of the pyramid axis&comma phase&comma hollow sleeve and spreading cylinder&comma and many others&time period
Presently&comma the back taper sort mandrel is the most common&period The oil goes into the cylinder by means of a rod cavity&period The cylinder pulls the pyramidal shaft backward alongside axial route and thrust section to broaden outdoors&comma so the drum is expanded&time period Pyramidal axis moves again ward together axial direction&comma and phase is pulled back by the T-important&comma thus the mandrel is shrinked&interval
