Mandrel of Pay-off Reel and Rigidity Reel
For sizzling rolling
The mandrel is the key portion of very hot rolling pressure reel for coils&period of time Coiling temperature is among 550 to 850ºC&time period The mandrel has mostly two sorts&colon link wedge type and double wedge variety&period of time
Url wedge sort can also be divided into two sorts&colon url wedge-coupling drive and link-spline generate&period of time
For hyperlink wedge-coupling sort tension reel&comma the mandrel is largely composed of mandrel body&comma spreader bar&comma section&comma hyperlink&comma wedge and spreading cylinder&interval Spreader bar has multistage slopes and phase is supported by multistage wedge&time period Phase is connected with spreader bar by hyperlink so segment does not fall off&interval With compression spring in the center of wedge&comma wedge can firmly make contact with segment and pyramid area&time period There is a gap in between the higher surface of wedge and phase&comma which can decrease the influence of coil head to mandrel during coiling coil&interval Mandrel physique is installed on two bearings&time period Electrical power is transmitted by topped-enamel coupling in the actual&period of time It is very handy to dismantle&comma and due to there is no equipment effect for the duration of working&comma mandrel rigidity is enhanced&interval It truly is very beneficial to control the dynamic stress&interval
The spreading principle of mandrel&colon spreader bar moves within mandrel physique in axial route dreivern by hydraulic cylinder&comma the slant of sperader bar pushes the wedge inside radial hole of mandrel human body to shift outward&time period The wedge surface area pushes section to expand outward&period of time Wedge diameter will broaden&time period Right after coiling coils&comma spreader bar moves in the opposite direction pushed by hydraulic cylinder&comma and pulls segment to shrink by means of website link&period Wedge moves inward and mandrel diameter becomes scaled-down to discharge condition&period Then you can start to discharge coil&time period
For the two varieties of link wedge-coupling push and url wedge-spline drive&comma the mandrel constructions and ideas are nearly very same and the major difference is push sort of mandrel&period of time For website link wedge-spline push variety&comma connection among mandrel and major transmission circumstances is spline&comma i&periode&period insert kind&interval When mouting and dismantling&comma mandrel can be straight inserted or pulled out of the main transmission instances to obtain the speedy substitute&period of time
The principal driving motor drives equipment shaft rotation via the intermediate shaft&interval The gear shaft dirves massive equipment rotation&comma and the large gear drives mandrel rotation by way of spline&interval
For the double wedge sort stress reel&comma the mandrel is mostly composed of mandrel body&comma spreader bar&comma segment&comma spreader wedge&comma buffer wege and hyd&period of time Cylinder&time period
The spreading principle of double wedge sort mandrel&colon hyd&time period Cylinder can make spreader bar transfer again and forth in axial direction and the wedge move in radical direction&time period So the segment gets to be huge&interval T-hook on spreader bar pulls wedge back again and the hook exterior the wedge pulls section again&interval This will make the manderel small&time period With spline connectiion for electrical power transmission unit&comma mandrel can be speedily replaced&time period Cooling h2o channel within the mandrel&comma so cooling result is excellent&interval Lubricant can be injected by automobile and manual type&comma so it can minimize elements put on&period of time
Shell out-off reel and pressure reel for cold rolling coils are utilised in cold rolling production line or shell out-off when acid pickling&commagalvanization&commaannealing&commashear&commacoating or coil pressure in out permit&period
Chilly rolling mandrel is the crucial element of spend-off reel and stress reel&time period According to various framework&comma it has beam wedge variety&comma pyramid axis variety&comma pyramid sleeve kind&comma wedge type&comma radial direction hydraulic cylinder sort&comma and so on&period of time Or simply&comma open type and near sort&period of time The close kind mandrel is a close circle CZPT hole in the surface area following increasing&periodit is suited for coiling slim strip metal&period The open kind mandrel indicates there is a gap between segments after mandrel expanding&comma suitable for coiling thicker strip metal&period of time
For chilly rolling
Pay out-off reel and rigidity reel for chilly rolling coils are utilised in cold rolling production line or pay out-off when acid pickling&comma gavanization&comma annealing&comma shear&comma coating or coil tension in outlet&period
Chilly rolling mandrel is the essential areas of shell out-off reel&pressure reel&period of time In accordance to diverse composition&comma it has beam wedge sort&comma pyramid axis type&comma pyramid sleeve type&comma wedge sort&comma radial course hydraulic cylinder type&comma ect&interval Or merely&comma open up type and shut type&period of time The shut sort mandrel is a shut circle CZPT gap in the surface right after increasing&period It is suited for coiling thin strip steel&period The open kind mandrel indicates there are a gap between segment following mandrel expanding&comma appropriate for coiling thicker strip metal&time period
The beam wedge kind mandrel is mainly composed of the primary shaft&comma expanding core&comma section&comma axial direction wedge&comma radial direction wedge and spreading cylinder&comma and so on&period There are two varieties of construction&colon with jaw or CZPT jaw&interval The mandrel with jaw is employed for coiling thicker strip steel&period It can also be established with steel sleeve or paper sleeve to coil with belt wrapper&period of time The mandrel CZPT jaw is utilized for coiling skinny strip metal by belt wrapper&period
The mandrel will move along axial path driven by the expanding core & wedge block&comma through relative sliding between the wedge block and phase&comma swelling and shrinking will happen in radial course&comma reset by spring&time period
The pyramidal axis kind mandrel is divided into tapper type and back again taper variety according to the tilting direction of axis slope&time period This mandrel has straightforward composition &commaless elements&comma massive principal shaft area and high power &periodSo it can bear huge stress&comma not only coiling &commabut also uncoiling&period of time There are two kinds of framework&colon with jaw or CZPT jaw &periodit’s mainly consisted of the pyramid axis&comma segment&comma hollow sleeve and spreading cylinder&comma and so on&interval
Presently&comma the back taper variety mandrel is the most popular&time period The oil goes into the cylinder through a rod cavity&interval The cylinder pulls the pyramidal shaft backward along axial route and press segment to grow outdoors&comma so the drum is expanded&period Pyramidal axis moves again ward along axial direction&comma and phase is pulled back again by the T-crucial&comma as a result the mandrel is shrinked&interval
