Product Description

Mandrel of Pay-off Reel and Tension Reel

For hot rolling 
The mandrel is the key part of hot rolling tension reel for coils.; Coiling temperature is between 550 to 850ºC.; The mandrel has mainly 2 types:; link wedge type and double wedge type.;

Link wedge type can also be divided into 2 kinds:; link wedge-coupling drive and link-spline drive.;

For link wedge-coupling type tension reel,; the mandrel is mainly composed of mandrel 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 2 bearings.; Power is transmitted by crowned-teeth coupling in the real.; It is very convenient to dismantle,; and due to there is no gear impact during working,; mandrel rigidity is improved.; It’s very beneficial to control the dynamic tension.;

The spreading principle of mandrel:; spreader bar moves inside mandrel body in axial direction dreivern by hydraulic cylinder,; the slant of sperader bar pushes the wedge inside radial hole of mandrel body to move outward.; The wedge surface pushes segment to expand outward.; Wedge diameter will expand.; After coiling coils,; spreader bar moves in the opposite direction driven by hydraulic cylinder,; and pulls segment to shrink through link.; Wedge moves inward and mandrel diameter becomes smaller to discharge state.; Then you can begin to discharge coil.;

For the 2 types of link wedge-coupling drive and link wedge-spline drive,; the mandrel structures and principles are almost same and the main difference is drive type of mandrel.; For link wedge-spline drive type,; connection between mandrel and main transmission cases is spline,; i.;e.; insert type.; When mouting and dismantling,; mandrel can be directly inserted or pulled out of the main transmission cases to achieve the rapid replacement.;
The main driving motor drives gear shaft rotation through the intermediate shaft.; The gear shaft dirves big gear rotation,; and the big gear drives mandrel rotation through spline.;

For the double wedge type tension reel,; the mandrel is mainly composed of mandrel body,; spreader bar,; segment,; spreader wedge,; buffer wege and hyd.; Cylinder.;

The spreading principle of double wedge type mandrel:; hyd.; Cylinder makes spreader bar move back and forth in axial direction and the wedge move in radical direction.; So the segment becomes big.; T-hook on spreader bar pulls wedge back and the hook outside the wedge pulls segment back.; This will make the manderel small.; With spline connectiion for power transmission unit,; mandrel can be rapidly replaced.; Cooling water channel inside the mandrel,; so cooling effect is good.; Lubricant can be injected by auto and manual type,; so it can reduce parts wear.;

Pay-off reel and tension reel for cold rolling coils are used in cold rolling production line or pay-off when acid pickling,;galvanization,;annealing,;shear,;coating or coil tension in out let.;
Cold rolling mandrel is the key part of pay-off reel and tension reel.; According to different structure,; it has beam wedge type,; pyramid axis type,; pyramid sleeve type,; wedge type,; radial direction hydraulic cylinder type,; etc.; Or simply,; open type and close type.; The close type mandrel is a close circle without gap in the surface after expanding.;it is suitable for coiling thin strip steel.; The open type mandrel means there is a gap between segments after mandrel expanding,; suitable for coiling thicker strip steel.;
 
For cold rolling
Pay-off reel and tension reel for cold rolling coils are used in cold rolling production line or pay-off when acid pickling,; gavanization,; annealing,; shear,; coating or coil tension in outlet.;

Cold rolling mandrel is the key parts of pay-off reel&tension reel.; According to different structure,; it has beam wedge type,; pyramid axis type,; pyramid sleeve type,; wedge type,; radial direction hydraulic cylinder type,; ect.; Or simply,; open type and close type.; The close type mandrel is a close circle without gap in the surface after expanding.; It is suitable for coiling thin strip steel.; The open type mandrel means there are a gap between segment after mandrel expanding,; suitable for coiling thicker strip steel.;

The beam wedge type mandrel is mainly composed of the main shaft,; expanding core,; segment,; axial direction wedge,; radial direction wedge and spreading cylinder,; etc.; There are 2 kinds of structure:; with jaw or without jaw.; The mandrel with jaw is used for coiling thicker strip steel.; It can also be set with steel sleeve or paper sleeve to coil with belt wrapper.; The mandrel without jaw is used for coiling thin strip steel by belt wrapper.;

The mandrel will move along axial direction driven by the expanding core & wedge block,; through relative sliding between the wedge block and segment,; swelling and shrinking will occur in radial direction,; reset by spring.;

The pyramidal axis type mandrel is divided into tapper type and back taper type according to the tilting direction of axis slope.; This mandrel has simple structure ,;less parts,; large main shaft section and high strength .;So it can bear large tension,; not only coiling ,;but also uncoiling.; There are 2 kinds of structure:; with jaw or without jaw .;it’s mainly consisted of the pyramid axis,; segment,; hollow sleeve and spreading cylinder,; etc.;

Presently,; the back taper type mandrel is the most popular.; The oil goes into the cylinder via a rod cavity.; The cylinder pulls the pyramidal shaft backward along axial direction and push segment to expand outside,; so the drum is expanded.; Pyramidal axis moves back ward along axial direction,; and segment is pulled back by the T-key,; thus the mandrel is shrinked.;

The Different Types of Splines in a Splined Shaft

A splined shaft is a machine component with internal and external splines. The splines are formed in 4 different ways: Involute, Parallel, Serrated, and Ball. You can learn more about each type of spline in this article. When choosing a splined shaft, be sure to choose the right 1 for your application. Read on to learn about the different types of splines and how they affect the shaft’s performance.

Involute splines

Involute splines in a splined shaft are used to secure and extend mechanical assemblies. They are smooth, inwardly curving grooves that resist separation during operation. A shaft with involute splines is often longer than the shaft itself. This feature allows for more axial movement. This is beneficial for many applications, especially in a gearbox.
The involute spline is a shaped spline, similar to a parallel spline. It is angled and consists of teeth that create a spiral pattern that enables linear and rotatory motion. It is distinguished from other splines by the serrations on its flanks. It also has a flat top. It is a good option for couplers and other applications where angular movement is necessary.
Involute splines are also called involute teeth because of their shape. They are flat on the top and curved on the sides. These teeth can be either internal or external. As a result, involute splines provide greater surface contact, which helps reduce stress and fatigue. Regardless of the shape, involute splines are generally easy to machine and fit.
Involute splines are a type of splines that are used in splined shafts. These splines have different names, depending on their diameters. An example set of designations is for a 32-tooth male spline, a 2,500-tooth module, and a 30 degree pressure angle. An example of a female spline, a fillet root spline, is used to describe the diameter of the splined shaft.
The effective tooth thickness of splines is dependent on the number of keyways and the type of spline. Involute splines in splined shafts should be designed to engage 25 to 50 percent of the spline teeth during the coupling. Involute splines should be able to withstand the load without cracking.

Parallel splines

Parallel splines are formed on a splined shaft by putting 1 or more teeth into another. The male spline is positioned at the center of the female spline. The teeth of the male spline are also parallel to the shaft axis, but a common misalignment causes the splines to roll and tilt. This is common in many industrial applications, and there are a number of ways to improve the performance of splines.
Typically, parallel splines are used to reduce friction in a rotating part. The splines on a splined shaft are narrower on the end face than the interior, which makes them more prone to wear. This type of spline is used in a variety of industries, such as machinery, and it also allows for greater efficiency when transmitting torque.
Involute splines on a splined shaft are the most common. They have equally spaced teeth, and are therefore less likely to crack due to fatigue. They also tend to be easy to cut and fit. However, they are not the best type of spline. It is important to understand the difference between parallel and involute splines before deciding on which spline to use.
The difference between splined and involute splines is the size of the grooves. Involute splines are generally larger than parallel splines. These types of splines provide more torque to the gear teeth and reduce stress during operation. They are also more durable and have a longer life span. And because they are used on farm machinery, they are essential in this type of application.

Serrated splines

A Serrated Splined Shaft has several advantages. This type of shaft is highly adjustable. Its large number of teeth allows large torques, and its shorter tooth width allows for greater adjustment. These features make this type of shaft an ideal choice for applications where accuracy is critical. Listed below are some of the benefits of this type of shaft. These benefits are just a few of the advantages. Learn more about this type of shaft.
The process of hobbing is inexpensive and highly accurate. It is useful for external spline shafts, but is not suitable for internal splines. This type of process forms synchronized shapes on the shaft, reducing the manufacturing cycle and stabilizing the relative phase between spline and thread. It uses a grinding wheel to shape the shaft. CZPT Manufacturing has a large inventory of Serrated Splined Shafts.
The teeth of a Serrated Splined Shaft are designed to engage with the hub over the entire circumference of the shaft. The teeth of the shaft are spaced uniformly around the spline, creating a multiple-tooth point of contact over the entire length of the shaft. The results of these analyses are usually satisfactory. But there are some limitations. To begin with, the splines of the Serrated Splined Shaft should be chosen carefully. If the application requires large-scale analysis, it may be necessary to modify the design.
The splines of the Serrated Splined Shaft are also used for other purposes. They can be used to transmit torque to another device. They also act as an anti-rotational device and function as a linear guide. Both the design and the type of splines determine the function of the Splined Shaft. In the automobile industry, they are used in vehicles, aerospace, earth-moving machinery, and many other industries.

Ball splines

The invention relates to a ball-spinned shaft. The shaft comprises a plurality of balls that are arranged in a series and are operatively coupled to a load path section. The balls are capable of rolling endlessly along the path. This invention also relates to a ball bearing. Here, a ball bearing is 1 of the many types of gears. The following discussion describes the features of a ball bearing.
A ball-splined shaft assembly comprises a shaft with at least 1 ball-spline groove and a plurality of circumferential step grooves. The shaft is held in a first holding means that extends longitudinally and is rotatably held by a second holding means. Both the shaft and the first holding means are driven relative to 1 another by a first driving means. It is possible to manufacture a ball-splined shaft in a variety of ways.
A ball-splined shaft features a nut with recirculating balls. The ball-splined nut rides in these grooves to provide linear motion while preventing rotation. A splined shaft with a nut that has recirculating balls can also provide rotary motion. A ball splined shaft also has higher load capacities than a ball bushing. For these reasons, ball splines are an excellent choice for many applications.
In this invention, a pair of ball-spinned shafts are housed in a box under a carrier device 40. Each of the 2 shafts extends along a longitudinal line of arm 50. One end of each shaft is supported rotatably by a slide block 56. The slide block also has a support arm 58 that supports the center arm 50 in a cantilever fashion.

Sector no-go gage

A no-go gauge is a tool that checks the splined shaft for oversize. It is an effective way to determine the oversize condition of a splined shaft without removing the shaft. It measures external splines and serrations. The no-go gage is available in sizes ranging from 19mm to 130mm with a 25mm profile length.
The sector no-go gage has 2 groups of diametrally opposed teeth. The space between them is manufactured to a maximum space width and the tooth thickness must be within a predetermined tolerance. This gage would be out of tolerance if the splines were measured with a pin. The dimensions of this splined shaft can be found in the respective ANSI or DIN standards.
The go-no-go gage is useful for final inspection of thread pitch diameter. It is also useful for splined shafts and threaded nuts. The thread of a screw must match the contour of the go-no-go gage head to avoid a no-go condition. There is no substitute for a quality machine. It is an essential tool for any splined shaft and fastener manufacturer.
The NO-GO gage can detect changes in tooth thickness. It can be calibrated under ISO17025 standards and has many advantages over a non-go gage. It also gives a visual reference of the thickness of a splined shaft. When the teeth match, the shaft is considered ready for installation. It is a critical process. In some cases, it is impossible to determine the precise length of the shaft spline.
The 45-degree pressure angle is most commonly used for axles and torque-delivering members. This pressure angle is the most economical in terms of tool life, but the splines will not roll neatly like a 30 degree angle. The 45-degree spline is more likely to fall off larger than the other two. Oftentimes, it will also have a crowned look. The 37.5 degree pressure angle is a compromise between the other 2 pressure angles. It is often used when the splined shaft material is harder than usual.