DE102005014874A1 - Expandable and contractible coiler mandrel - Google Patents

Abstract

The invention relates to an expandable and contractible winder (1), in particular for winding a metal strip. Said pin comprises: a rotatably mounted winder shaft (2), whose outer periphery comprises at least one wedge surface (3); a number of co-operating segments (4), whose outer periphery comprises a winding surface (5), in particular for the metal strip and whose end region (6) that faces away from the winding surface (5) has at least one counter wedge surface (7) that co-operates with the wedge surface (3) of the winder shaft (2); elements (8) for displacing the segments (4) in relation to the winder shaft (2) in the axial direction (A) of the latter; and a conduit system (9), which is used to conduct a lubricant, in particular a lubricating grease, to various points (10) on the winder (1) that require lubrication. To improve the lubrication of the winder, the conduit system (9) is connected to a lubricant pump (11), the latter (11) having an actuating element (12) for carrying out the pump operation. The lubricant pump (11) is connected to the elements (8) for displacing the segments (4) or to the winder (2) and the actuating element (12) is connected to the other element (2, 8) in such a way that the pumping operation is carried out when the elements (8) for displacing the segments (4) are actuated.

Description

The The invention relates to an expandable and contractible coiler mandrel, especially for the Winding a metal strip comprising: a rotatably mounted one Bobbin mandrel having at least one wedge surface on its outer periphery, one Number of interacting segments on their outer circumference a changing area, especially for the metal band, and in their facing away from the winding surface End region at least one cooperating with the wedge surface of the coiler mandrel shaft Against wedge surface have means for displacing the segments relative to the reel mandrel shaft in the axial direction and a piping system with which a lubricant, especially grease, is directed to places in the coiler mandrel, the Need lubrication.

coiler drums The type mentioned are, for example, in steel strip production needed. On they become the bands wound up or unwound to z. B. further manufacturing steps on the tape perform. So that the tape wound without slippage on the mandrel or unwound can be, the coiler mandrel is expandable and contractible. Ie. provided for winding the tape winding surface of the Dorns can be varied in diameter. The reel mandrel is so for example during the winding process hydraulically spread, so that a positive connection arises between the mandrel and the metal band.

there is it for a stable and reproducible operation of the coiler mandrel required that it is sufficiently lubricated, in particular with lubricating grease, is supplied. Only then its operating characteristics are above Time constant. Furthermore this is the only way to prevent wear.

For lubricating the coiler mandrel various solutions are known:
On the one hand, the lubrication can be performed manually via grease nipples, which takes place at predetermined time intervals. The added amount of grease must reach until the next relubrication. Over lubrication with impermissible leakage of grease can be the result, which proves to be particularly problematic because often fat loss occurs due to the centrifugal force in the coiler mandrel.

A different possibility the lubrication of a coiler mandrel with a free shaft end, mostly On the drive side, is the with a rotating rotary distributor of a stationary one Grease pump off. The grease is hereby guided to the coiler mandrel. It can a permanent supply of grease in the context of central lubrication be provided, which are provided in particular in a Warmhasel can.

at Stainless steel hasp thorns become common at the operator side shaft end over the mandrel support bearing at standstill automatically by means of an attachable medium coupling made the grease connection and thus performed the lubrication. in the Operation of the coiler mandrel is then decoupled the grease connection.

Known are also permanently acting lubricant distributor, but often not the needed Apply grease pressure to ensure a good supply of all lubrication points sure.

From the EP 0 722 791 B1 a lubricating device for an expandable coiler mandrel is known in which all lubrication points on the mandrel shaft are centrally lubricated. In this case, cartridges are used here in a central bore of the mandrel shaft, which are in communication with the lubrication points to be supplied. Furthermore, the connection to a central grease distribution is provided, which supplies holes in the cartridge with grease.

Also from DE-OS 20 32 542 is a supply of the lubrication points of a Coiler mandrel by means of an integrated in the mandrel grease line system provided, this to the supply line of a pressure medium source connected. The lubricant is doing over such a line and a distributor member fed to the coiler mandrel.

Similar solutions are from the US 2,578,953 and from the US 4,213,577 known.

adversely it is in the known solutions, that often one too big or too small amount of lubricant the coiler mandrel and by name is supplied to his bodies to be lubricated. There is lack of lubrication as well as over-lubrication with big Disadvantages connected. Lack of lubrication can cause seizing each other sliding surfaces come in the coiler mandrel. With over-lubrication not only higher ones arise Costs as necessary, it can also lead to an environmental impact, the costly must be corrected.

The mentioned problem is additional aggravated by that it is due to the centrifugal forces in the coiler mandrel to a throwing away of the lubricant from the Place can come where it is needed.

In other solutions, the handling is very disadvantageous, namely, when media systems at certain time intervals on the coiler mandrel must be closed to supply grease.

Of the Invention is dahr the task, a coiler mandrel of the aforementioned type so that the disadvantages mentioned be avoided. It should thus improved lubrication of the Dorns be achieved by economic and ecological Advantages.

The solution this object by the invention is characterized in that the piping system communicates with a lubricant pump, wherein the lubricant pump is an actuating element for carrying out the Pumping operation, wherein the lubricant pump with the means for moving the segments or with the reel mandrel shaft and the actuator the other of the two elements is connected in such a way that during operation the means for moving the segments of the pumping operation is performed.

Of the The idea of the invention therefore depends on the lubricant pump only in the axial displacement movement for spreading or for contraction of the coiler mandrel is activated and only then a lubrication of Places requiring lubrication he follows. The operation The lubricant pump is thereby from the sliding movement in the coiler mandrel derived, leaving an external control, movement or supply are unnecessary for lubrication.

A first training provides that the lubricant pump with a Lubricant reservoir communicates. This can be refilled as needed at relatively long intervals or be replaced. Furthermore, the lubricant pump within arranged the lubricant reservoir become. Furthermore, it is advantageous if the lubricant reservoir in axial end portion of the coiler mandrel is arranged.

Around also arranged arbitrarily far from the lubricant pump on the mandrel Lubrication points reliable to supply lubricant, the lubricant pump is preferred suitable for applying a lubricating pressure of at least 150 bar.

The actuator can be designed as designed in the axial direction of the coiler mandrel pen be.

The Means for displacing the segments relative to the reel mandrel shaft can a arranged in a central bore of the reel mandrel drawbar and have a pressure plate connected to the drawbar. In this case, it is advantageously provided that the pin-shaped actuating element penetrated at least the axial end portion of the pressure plate and abuts an axial end of the reel mandrel shaft. In this case is then the lubricant pump - arranged in the lubricant reservoir - firmly on Attached pressure plate; the actuator the lubricant pump passes through an axially aligned bore in the pressure plate and abuts the axial end of the reel mandrel shaft. In the axial displacement between reel mandrel shaft and pressure plate - and only Then it will be the lubricant pump is actuated.

A Further training provides that in the line system between lubricant pump and at least one lubricant distributor arranged to be lubricated place is to differentiate the lubricant in different ways branched to smearing places. Preferably, a first branches Lubricant distributor the lubricant from the lubricant pump to each segment, each segment having a second lubricant distributor is arranged, which supplies the lubricant to each of the contact points of wedge surfaces and counter wedge surfaces passes.

With particular advantage is provided that the lubricant pump velvet Actuator as well the lubricant reservoir as retrofittable Unit is arranged on the coiler mandrel. This will make it possible existing Convert reel mandrel systems to the proposed solution according to the invention.

Of the Invention proposal is characterized by the fact that it is very simple and thus cheaper way possible is, a variety of lubrication points - for example, more than 20 - with relative huge Fat cable lengths reliable To supply with lubricant, without requiring a lot of equipment to have to drive. The required bold pressure can be easily built up to reliably overcome even relatively long line distances.

It takes place in the proposal according to the invention only ever a lubricant promotion, if this is actually needed. If the coiler mandrel is neither expanded nor contracted, there is no lubrication, as this is not necessary in these operating conditions. Only when an expansion or contraction occurs, the lubrication system is activated. This is a permanent lubrication in case of need, ie at each working stroke of the mandrel. Thus, a minimum quantity lubrication over a long period is possible. The reel mandrel thus supplies itself in accordance with the frequency of movement of the mandrel with fat. The sliding surfaces of the moving parts of the mandrel thus always have sufficient lubricant supply, whereby an approximately constant coefficient of friction is ensured, which is particularly advantageous during operation. Ie. the resistance to movement when spreading or contracting the mandrel hardly changes during the operating time.

Of the provided grease reservoir provides self-sufficient lubrication points, so that there is no coupling the coiler mandrel to external media supply systems needed. In order to the handling effort is significantly reduced. In addition, a deleted Coupling to an otherwise needed one Energy supply (electricity). At longer intervals can the grease reservoir refilled or exchanged.

There The lubrication is only done when the mandrel is moving, too no monitoring, for example, by a monitoring device required.

All in all reduce the cost of the Operating the coiler mandrel, and monitoring devices, like pressure monitoring or limit switch positions when coupling supply systems, become redundant. Automation of lubrication is easier Way possible.

In the drawing is an embodiment of Invention shown. Show it:

1 a spreadable coiler mandrel in side view in a sectional view,

2 the right axial end portion of the coiler mandrel according to 1 in an enlarged view and

3 the front view (seen in the axial direction A) of the coiler mandrel.

In the figures is a coiler mandrel 1 shown, which is expandable or contractible, as far as its winding surface. The coiler mandrel 1 has a reel mandrel shaft 2 in the axial direction A with a number of wedge surfaces 3 is provided. The reel mandrel shaft 2 is in the embodiment of four segments 4 surrounded (see in particular 3 ), each forming about a quarter of a circular ring. At the radial outside, the segments have 4 one winding area each 5 , which serves for winding a metal band. The one from this wrap area 5 opposite end region 6 of each segment 4 has a counter wedge surface 7 on, from the wedge angle of the wedge surface 3 equivalent.

Like the instant 1 and 2 can be taken, this means that at a relative displacement of the segments 4 to the reel mandrel shaft 2 in the axial direction A a waking, ie an outward sliding, the segments 4 , or a contraction of the segments 4 he follows.

This axial displacement of the segments 4 relative to the reel mandrel shaft 2 is by means of 8th accomplished, among other things, a drawbar 15 have in a central hole 14 the reel mandrel shaft 2 is arranged. The drawbar 15 is at its one axial end with a pressure plate 16 screwed. When moving the drawbar 15 in the axial direction A in the central bore 14 the pressure plate moves 16 accordingly with. This has a radially outwardly extending operating portion 19 that is in a recess 20 in the segments 4 intervenes. This causes the segments to move 4 by the amount of the pull rod 15 in the axial direction A with.

The wedge surfaces 3 and 7 put places on their contact surfaces 10 that is for a good working of the coiler mandrel 1 must be supplied with lubricating grease when waking up or contracting. Therefore, these lubrication places 10 when expanding and contracting the coiler mandrel 1 via a pipe system 9 Lubricating grease supplied.

For this purpose, a lubricant pump is used 11 standing in a lubricant reservoir 13 is arranged, in the axial end region of the coiler mandrel 1 screwed on. pump 11 and containers 13 are arranged so that they are firmly attached to the pressure plate 16 are connected.

The pressure plate 16 has a hole 21 on, in which an actuator 12 for the lubricant pump 11 is arranged. The bore axis points in the axial direction A. Furthermore, the pin-shaped actuating element is located 12 with its one axial end at the axial end of the reel mandrel shaft 2 at.

At the relative axial displacement between reel mandrel shaft 2 and segments 4 including pressure plate 16 and lubricant pump 11 with lubricant reservoir 13 This means that that on the reel mandrel shaft 2 fitting actuator 12 is moved and so the pump 11 Pressed so that this fat from the container 13 into the pipe system 9 promotes. This conveying takes place exclusively during the relative movement of the parts 2 and 4 . 16 . 11 so that only then the places 10 be supplied with grease. Thus, just the right amount of fat is the places 10 fed. There is neither lack of lubrication nor over-lubrication. The delivery rate of the lubricant pump 11 can be chosen accordingly.

First, this will be in the lubricant reservoir 13 located grease during pumping via an intake pipe 22 from the pump 11 sucked and over the line 23 into the pipe 24 and via this to a first lubricant distributor 17 promoted. This first lubricant distributor 17 divides the fat volume into four paths and directs it to a total of four second lubricant distributors 18 ; every second lubricant distributor 18 is a segment 4 assigned. From every second lubricant distributor 18 the grease enters a distribution hole 25 where each segment 4 has such. How best 1 can be seen, branches off the distribution well 25 Zubringbohrungen 26 to the individual places to be smeared 10 from.

Correspondingly, grease could also pass through a pipe 27 in the reel mandrel shaft 2 and feed bores 28 to the places 10 be directed.

Due to the design of the lubrication system, the coiler mandrel lubricates 1 automatically and depending on the frequency of movement of the mandrel with respect to the expansion or contraction. External connections using a rotary distributor or an external media coupling, if necessary with electrical position monitoring via limit switches, are not required. The high grease pressure required for large line lengths and many lubrication points can be set up as high as desired, thanks to the design and choice of pump 11 is determinable.

The Supply with minimum lubricant quantity per lubrication point can self-sufficient without external supply facilities. The type of fat is expert selected on the basis of the requirements of the respective coiler mandrel.

It is also advantageous that the lubricant reservoir 13 including pump 11 can be retrofitted to existing systems. This offers a cost-effective possibility of minimum quantity lubrication of the moving parts. With a constant greasy film in the places 10 is the coefficient of friction and thus the internal resistance of the coiler mandrel 1 kept constant. A change due to lack of lubrication and thus the risk of self-locking of the spine is thus avoided. Straight reel mandrels, the segments of which carry the load of coil weight and belt pressure adjustable via wedge surfaces, require a nearly constant coefficient of friction, which can only be ensured by a permanent lubrication during the movement.

1

coiler mandrel

2

Coiler mandrel shaft

3

wedge surface

4

segment

5

winding surface

6

end

7

Against wedge surface

8th

medium to move the segments

9

line system for lubricants

10

of lubrication

11

lubricant pump

12

actuator

13

Lubricant reservoir

14

central bore

15

pull bar

16

printing plates

17

first lubricant distributors

18

second lubricant distributors

19

actuating section

20

recess

21

drilling

22

intake

23

management

24

management

25

distribution bore

26

Zubringbohrung

27

management

28

Zubringbohrung

A

axially

Claims (11)

Expandable and contractible reel mandrel ( 1 ), in particular for winding a metal strip, comprising: a rotatably mounted coiler mandrel shaft ( 2 ), which on its outer circumference at least one wedge surface ( 3 ), a number of interacting segments ( 4 ), which at its outer periphery a winding surface ( 5 ), in particular for the metal band, and in their from the winding surface ( 5 ) end region ( 6 ) at least one with the wedge surface ( 3 ) of the reel mandrel shaft ( 2 ) cooperating counter-wedge surface ( 7 ), means ( 8th ) for moving the segments ( 4 ) relative to the reel mandrel shaft ( 2 ) in its axial direction (A) and a line system ( 9 ), with which a lubricant, in particular grease, to places ( 10 ) in the coiler mandrel ( 1 ), which require lubrication, characterized in that the piping system ( 9 ) with a lubricant pump ( 11 ), wherein the lubricant pump ( 11 ) an actuating element ( 12 ) for performing the pumping operation, wherein the Schmiermittelpum pe ( 11 ) with the means ( 8th ) for moving the segments ( 4 ) or with the reel mandrel shaft ( 2 ) and the actuating element ( 12 ) the other of the two elements ( 2 . 8th ) in such a way that when the funds are ( 8th ) for moving the segments ( 4 ) the pumping operation is performed. Reel mandrel according to claim 1, characterized in that the lubricant pump ( 11 ) with a lubricant reservoir ( 13 ). Reel mandrel according to claim 2, characterized in that the lubricant pump ( 11 ) within the lubricant reservoir ( 13 ) is arranged. Hoop mandrel according to claim 2 or 3, characterized in that the lubricant reservoir ( 13 ) in the axial end region of the coiler mandrel ( 1 ) is arranged. Reel mandrel according to one of claims 1 to 4, characterized in that the lubricant pump ( 11 ) is suitable for applying a lubricating pressure of at least 150 bar. Hoop mandrel according to one of claims 1 to 5, characterized in that the actuating element ( 12 ) is formed as in the axial direction (A) aligned pin. Hoop mandrel according to one of claims 1 to 6, characterized in that the means ( 8th ) for moving the segments ( 4 ) relative to the reel mandrel shaft ( 2 ) one in a central bore ( 14 ) of the reel mandrel shaft ( 2 ) arranged pull rod ( 15 ) and a pressure plate connected to the drawbar ( 16 ) exhibit. Hoop mandrel according to claim 6 and 7, characterized in that the pin-shaped actuating element ( 12 ) at least the axial end portion of the pressure plate ( 16 ) and at one axial end of the coiler mandrel shaft ( 2 ) is present. Hoop mandrel according to one of claims 1 to 8, characterized in that in the line system ( 9 ) between lubricant pump ( 11 ) and place to be smeared ( 10 ) at least one lubricant distributor ( 17 . 18 ) is arranged, the lubricant on different conduction paths to different locations to be lubricated ( 10 ) branches. A reel mandrel according to claim 9, characterized in that a first lubricant distributor ( 17 ) the lubricant from the lubricant pump ( 11 ) to each segment ( 4 ) branches and that on each segment ( 4 ) a second lubricant distributor ( 18 ), which supplies the lubricant to each of the contact points ( 10 ) of wedge surfaces ( 3 ) and counter wedge surfaces ( 7 ). Reel mandrel according to one of claims 2 to 10, characterized in that the lubricant pump ( 11 ) together with actuator ( 12 ) and the lubricant reservoir ( 13 ) as a retrofittable unit on the coiler mandrel ( 1 ) is arranged.