Mandrel of Pay-off Reel and Pressure Reel
For hot rolling
The mandrel is the essential component of sizzling rolling tension reel for coils&period of time Coiling temperature is between 550 to 850ºC&interval The mandrel has primarily two types&colon link wedge type and double wedge kind&interval
Link wedge kind can also be divided into two varieties&colon url wedge-coupling travel and link-spline travel&period of time
For hyperlink wedge-coupling kind rigidity reel&comma the mandrel is mainly composed of mandrel body&comma spreader bar&comma section&comma link&comma wedge and spreading cylinder&time period Spreader bar has multistage slopes and phase is supported by multistage wedge&interval Section is related with spreader bar by website link so segment does not drop off&period With compression spring in the center of wedge&comma wedge can firmly get in touch with phase and pyramid area&time period There is a gap in between the upper area of wedge and section&comma which can reduce the influence of coil head to mandrel for the duration of coiling coil&period of time Mandrel body is put in on two bearings&time period Power is transmitted by topped-enamel coupling in the genuine&period It is really convenient to dismantle&comma and because of to there is no gear influence during working&comma mandrel rigidity is enhanced&period of time It is really useful to management the dynamic pressure&time period
The spreading theory of mandrel&colon spreader bar moves within mandrel human body in axial direction dreivern by hydraulic cylinder&comma the slant of sperader bar pushes the wedge inside radial gap of mandrel physique to transfer outward&period The wedge area pushes segment to increase outward&time period Wedge diameter will broaden&period of time Following coiling coils&comma spreader bar moves in the reverse course driven by hydraulic cylinder&comma and pulls phase to shrink by means of link&interval Wedge moves inward and mandrel diameter turns into more compact to discharge point out&time period Then you can commence to discharge coil&time period
For the two types of url wedge-coupling generate and website link wedge-spline drive&comma the mandrel structures and principles are virtually very same and the major variation is drive type of mandrel&period of time For link wedge-spline drive kind&comma link among mandrel and main transmission cases is spline&comma i&periode&interval insert sort&interval When mouting and dismantling&comma mandrel can be directly inserted or pulled out of the main transmission situations to attain the quick replacement&period
The major driving motor drives gear shaft rotation via the intermediate shaft&interval The gear shaft dirves large gear rotation&comma and the large gear drives mandrel rotation by means of spline&period
For the double wedge kind tension reel&comma the mandrel is primarily composed of mandrel entire body&comma spreader bar&comma phase&comma spreader wedge&comma buffer wege and hyd&interval Cylinder&period of time
The spreading principle of double wedge sort mandrel&colon hyd&interval Cylinder helps make spreader bar transfer back and forth in axial path and the wedge shift in radical path&period of time So the phase turns into huge&time period T-hook on spreader bar pulls wedge back and the hook outdoors the wedge pulls phase again&period This will make the manderel modest&period of time With spline connectiion for electricity transmission unit&comma mandrel can be rapidly replaced&period of time Cooling h2o channel inside the mandrel&comma so cooling result is very good&interval Lubricant can be injected by vehicle and handbook kind&comma so it can lessen components put on&period of time
Shell out-off reel and stress reel for chilly rolling coils are utilized in cold rolling production line or spend-off when acid pickling&commagalvanization&commaannealing&commashear&commacoating or coil tension in out let&period of time
Cold rolling mandrel is the essential portion of pay-off reel and stress reel&period According to diverse construction&comma it has beam wedge sort&comma pyramid axis type&comma pyramid sleeve kind&comma wedge type&comma radial direction hydraulic cylinder kind&comma etc&period Or basically&comma open type and shut type&period of time The close sort mandrel is a near circle CZPT gap in the surface area following expanding&periodit is ideal for coiling slim strip metal&time period The open variety mandrel implies there is a gap amongst segments after mandrel growing&comma suitable for coiling thicker strip metal&period of time
For cold rolling
Pay out-off reel and rigidity reel for cold rolling coils are used in chilly rolling manufacturing line or spend-off when acid pickling&comma gavanization&comma annealing&comma shear&comma coating or coil rigidity in outlet&interval
Cold rolling mandrel is the essential areas of shell out-off reel&pressure reel&period In accordance to distinct structure&comma it has beam wedge kind&comma pyramid axis variety&comma pyramid sleeve type&comma wedge kind&comma radial course hydraulic cylinder type&comma ect&time period Or merely&comma open type and close sort&period The shut variety mandrel is a shut circle CZPT gap in the area following growing&time period It is suitable for coiling skinny strip metal&period The open up type mandrel implies there are a hole in between phase following mandrel increasing&comma appropriate for coiling thicker strip metal&period
The beam wedge kind mandrel is largely composed of the main shaft&comma expanding core&comma section&comma axial direction wedge&comma radial direction wedge and spreading cylinder&comma and so forth&period There are two varieties of framework&colon with jaw or CZPT jaw&time period The mandrel with jaw is utilised for coiling thicker strip metal&period It can also be established with steel sleeve or paper sleeve to coil with belt wrapper&period The mandrel CZPT jaw is utilised for coiling slim strip metal by belt wrapper&period
The mandrel will move alongside axial direction driven by the expanding main & wedge block&comma through relative sliding between the wedge block and section&comma swelling and shrinking will arise in radial path&comma reset by spring&period
The pyramidal axis type mandrel is divided into tapper type and back again taper variety in accordance to the tilting route of axis slope&period This mandrel has straightforward construction &commaless areas&comma big major shaft section and higher power &periodSo it can bear big tension&comma not only coiling &commabut also uncoiling&period There are two varieties of construction&colon with jaw or CZPT jaw &periodit’s largely consisted of the pyramid axis&comma phase&comma hollow sleeve and spreading cylinder&comma and many others&period
Presently&comma the back taper sort mandrel is the most well-known&period of time The oil goes into the cylinder via a rod cavity&period of time The cylinder pulls the pyramidal shaft backward together axial direction and push section to grow exterior&comma so the drum is expanded&interval Pyramidal axis moves back again ward alongside axial route&comma and phase is pulled back again by the T-crucial&comma therefore the mandrel is shrinked&interval
