Mandrel Shaft for Hot Rolled Strip

Mandrel of Pay-off Reel and Pressure Reel

For very hot rolling 
The mandrel is the key portion of hot rolling pressure reel for coils&time period Coiling temperature is between 550 to 850ºC&period of time The mandrel has primarily two kinds&colon link wedge kind and double wedge sort&time period

Hyperlink wedge kind can also be divided into two types&colon website link wedge-coupling drive and link-spline travel&period

For hyperlink wedge-coupling variety pressure reel&comma the mandrel is primarily composed of mandrel entire body&comma spreader bar&comma phase&comma link&comma wedge and spreading cylinder&period Spreader bar has multistage slopes and segment is supported by multistage wedge&period of time Segment is connected with spreader bar by link so segment does not fall off&interval With compression spring in the middle of wedge&comma wedge can firmly contact segment and pyramid surface&time period There is a gap among the upper area of wedge and phase&comma which can reduce the effect of coil head to mandrel in the course of coiling coil&interval Mandrel human body is installed on two bearings&interval Electrical power is transmitted by topped-tooth coupling in the true&period It is very hassle-free to dismantle&comma and due to there is no equipment effect throughout working&comma mandrel rigidity is improved&period It really is very advantageous to control the dynamic stress&period of time

The spreading basic principle of mandrel&colon spreader bar moves within mandrel entire body in axial route dreivern by hydraulic cylinder&comma the slant of sperader bar pushes the wedge inside of radial gap of mandrel body to shift outward&interval The wedge floor pushes section to increase outward&interval Wedge diameter will grow&period After coiling coils&comma spreader bar moves in the reverse path driven by hydraulic cylinder&comma and pulls phase to shrink by means of hyperlink&period Wedge moves inward and mandrel diameter becomes smaller sized to discharge state&period of time Then you can begin to discharge coil&period of time

For the two types of hyperlink wedge-coupling drive and website link wedge-spline generate&comma the mandrel constructions and concepts are virtually identical and the main big difference is push type of mandrel&interval For website link wedge-spline drive type&comma connection in between mandrel and principal transmission cases is spline&comma i&periode&period of time insert sort&period When mouting and dismantling&comma mandrel can be right inserted or pulled out of the primary transmission cases to obtain the fast substitute&period of time
The primary driving motor drives gear shaft rotation by means of the intermediate shaft&period The gear shaft dirves massive equipment rotation&comma and the large gear drives mandrel rotation via spline&period of time

For the double wedge kind pressure reel&comma the mandrel is mainly composed of mandrel entire body&comma spreader bar&comma section&comma spreader wedge&comma buffer wege and hyd&period Cylinder&interval

The spreading basic principle of double wedge sort mandrel&colon hyd&time period Cylinder helps make spreader bar shift back and forth in axial course and the wedge transfer in radical direction&time period So the phase gets massive&time period T-hook on spreader bar pulls wedge back and the hook outside the wedge pulls section back again&period of time This will make the manderel modest&period With spline connectiion for power transmission unit&comma mandrel can be swiftly replaced&period Cooling drinking water channel within the mandrel&comma so cooling result is good&period of time Lubricant can be injected by auto and handbook sort&comma so it can decrease parts put on&time period

Pay out-off reel and tension reel for cold rolling coils are used in cold rolling generation line or pay-off when acid pickling&commagalvanization&commaannealing&commashear&commacoating or coil tension in out allow&period
Cold rolling mandrel is the key portion of spend-off reel and stress reel&interval According to various composition&comma it has beam wedge kind&comma pyramid axis kind&comma pyramid sleeve type&comma wedge type&comma radial direction hydraulic cylinder variety&comma and many others&interval Or basically&comma open type and near variety&interval The close variety mandrel is a near circle CZPT hole in the surface right after growing&periodit is suitable for coiling thin strip steel&period of time The open sort mandrel implies there is a gap in between segments after mandrel increasing&comma suitable for coiling thicker strip steel&time period
For chilly rolling
Spend-off reel and pressure reel for cold rolling coils are utilised in chilly rolling creation line or spend-off when acid pickling&comma gavanization&comma annealing&comma shear&comma coating or coil pressure in outlet&time period

Chilly rolling mandrel is the essential areas of spend-off reel&tension reel&period In accordance to different structure&comma it has beam wedge variety&comma pyramid axis sort&comma pyramid sleeve variety&comma wedge variety&comma radial direction hydraulic cylinder type&comma ect&time period Or simply&comma open sort and shut kind&period of time The close variety mandrel is a close circle CZPT gap in the floor after increasing&period It is ideal for coiling skinny strip steel&period of time The open up kind mandrel implies there are a hole amongst segment after mandrel growing&comma appropriate for coiling thicker strip metal&time period

The beam wedge type mandrel is mostly composed of the primary shaft&comma expanding core&comma segment&comma axial direction wedge&comma radial direction wedge and spreading cylinder&comma and so on&interval There are two sorts of construction&colon with jaw or CZPT jaw&period of time The mandrel with jaw is utilised for coiling thicker strip metal&period of time It can also be established with steel sleeve or paper sleeve to coil with belt wrapper&time period The mandrel CZPT jaw is employed for coiling thin strip steel by belt wrapper&interval

The mandrel will move together axial course pushed by the expanding core & wedge block&comma through relative sliding between the wedge block and phase&comma swelling and shrinking will happen in radial direction&comma reset by spring&period of time

The pyramidal axis type mandrel is divided into tapper variety and again taper type in accordance to the tilting path of axis slope&period This mandrel has easy composition &commaless parts&comma massive principal shaft section and large toughness &periodSo it can bear massive stress&comma not only coiling &commabut also uncoiling&interval There are two kinds of composition&colon with jaw or CZPT jaw &periodit’s primarily consisted of the pyramid axis&comma phase&comma hollow sleeve and spreading cylinder&comma and so forth&time period

Presently&comma the back taper type mandrel is the most well-liked&period The oil goes into the cylinder by means of a rod cavity&period of time The cylinder pulls the pyramidal shaft backward together axial course and drive phase to broaden outside&comma so the drum is expanded&interval Pyramidal axis moves again ward alongside axial course&comma and segment is pulled back again by the T-important&comma therefore the mandrel is shrinked&time period

Mandrel Shaft for Hot Rolled Strip