FI117640B - A guide roll for a forming machine and methods for manufacturing and operating a corresponding guide roll - Google Patents

Abstract

The invention relates to a guide roll for a web forming machine. The guide roll (15, 15') includes a shell (10) of a sheet material, with end pieces (11) at both of its ends. In addition, in each end piece (11) there is an end plate (13) , with a protruding shaft (14) in it for a bearing arrangement (12) . The end plate (13) and the protruding shaft (14) are arranged as separate pieces. In addition, there is at least one shaped plate piece (19) between the end plate (13) and the protruding shaft (14), separate in the axial direction from the point of contact between the end plate (13) and the protruding shaft (14). The invention also relates to a method for manufacturing and using the guide roll (15, 15 ').

Description

117640

WIRE ROLL FOR A MOLDING MACHINE AND METHODS FOR THE MANUFACTURE AND USE OF A CORE WIRE ROLL

The invention relates to a guide roll for a web forming machine 5 comprising: - a sheath of sheet material, - at both ends of the sheath, end bearings for rotatably supporting the guide roll with bearings to a web forming machine, i and 10 - at each end member for an end plate and a projection.

The invention also relates to methods for manufacturing and operating a guide roll.

15 In a web forming machine, such as a paper or board machine, numerous guide rolls are used. The guide roll supports .¾ such as felt or wire. The guide roller is generally small in coverage, whereby it is lightly loaded. In addition, the forming machine has special paper guide rolls 20 through which only the paper web is conveyed. In this case, the line load on the paper guide roller is of the order of 1 kN / m. In known lead rolls • t * 'd

ϊ.ϊ! the sheath is made of sheet steel, which is bent and welded. J

: * .. The guide roller uses molded end pieces that are attached to the sheath. In the prior art, the sheath is finally machined round and the guide roll is rebalanced.

Known endpieces are made from casting machines - •,; · rackets. In practice, the structure and dimensions of the sheath and end piece are measured

, the support is determined by machinability, although the load capacity requirement I

* · · * ·· | 30 is small. This causes the guide roll to become over-robust and expensive in relation to the application * * i * ··· *. In addition, the molded end piece combined with the thin jacket is vibrationally poor. In practice, *; '** · the sheet-shaped sheath also bends, which is impossible to compensate in the known conductor rolls.

The object of the invention is to provide a novel guide roll for the forming machine which is lighter and simpler than before. It is also an object of the invention to provide a novel method for producing a guide roll for a web forming machine which is simple and which easily provides new features to the guide roll. It is a further object of the invention to provide a novel method of operating a guide roll for a web forming machine which avoids problems such as bending. The characteristic features of a guide roll according to the present invention are set forth in claim 10 1. Accordingly, the characteristic features of the manufacturing process of the invention are set forth in the attached claim; The characteristic features of the operating method according to the invention are apparent from the appended claim 15. The guide roll according to the invention has a novel design of the jacket and end piece 15, thereby providing a simple and inexpensive guide roll. In addition, the manufacturing process can significantly reduce costs while at least at the same level as the leading roll characteristics. On the other hand, features which increase the usability and manufacturability of the guide roll can be combined with the guide roll. In addition, the guide roll · · · # $ * · * * according to the invention can be used in a novel and surprising way, for example: * · why the deflection of the guide roll is controlled. At the same time the guide roll ΐ ··. · Ί / ·· can be rotated at higher rotational speeds.

The invention will now be described in detail with reference to i ····. **. attached drawings illustrating certain embodiments of the invention, * 9. Figure 1 shows a section of a paper roll according to the invention fitted to a press section of a forming machine, ♦ * j * .. Figure 2a shows a part of the guide roll according to the invention, axonometically depicted, · ♦ * / . Figure 2b shows a schematic drawing of a wiring harness according to the invention. Fig. 3 shows a plan view of another embodiment of a cable roll end according to the invention in sectional view, 3 117640

Fig. 4 is a schematic view of a third embodiment of a guide roll end portion of the invention, in section;

Fig. 5 is a schematic drawing, partly in section, of a fourth embodiment of a cable roll end member according to the invention,

Fig. 6 is a plan view illustrating an embodiment of a support roll according to the invention.

Figure 1 is a side view of a press section of a web forming machine 10. Typically, the forming machine is a paper or board machine in which the guide roll is used at different positions. The embodiment of Figure 1 also includes two paper guide rolls 15, which also have their own drives. The guide roll 15 'according to the invention can also be used in connection with a fabric (Fig. 1). Later, 15 lead rolls are more simply referred to as rolls. Generally, the roll 15 includes a sheath 10 of sheet material and end portions 11 at both ends thereof for supporting the roll 15 by bearings 12 from a rotating web forming machine (Figure 2a).

The diaper may further comprise a surface treatment or coating. End cap 20 also has a projection shaft 14 for bearing 12. Figs. 3 and 4 partially show a cross-section of a roller according to the invention * · ϊ, * ··. According to the invention, the end piece 11 includes the end plate 13 and the projection shaft 14 arranged as separate pieces. In addition, there is • · · Φ. Between the end plate 13 and the projection shaft 14. ***. at least one shaped plate body 19 disposed axially apart at the point of contact between the end plate 13 and the projection shaft 14.

That is, the plate body 19 is arranged such that its radially inner edge or edge region is connected to the projection 14 and the radially outer edge or edge region is attached to the end plate 13. or diaper or both, either directly ♦ · · or via the spacer (s). In this case, the different parts of the end piece, · [·, can be produced separately, thus avoiding • · · · I *. casting and machining of large pieces. In addition, parts * '35 can be made even in different ways and from different materials. At the same time, thinner materials can be used. In addition, by using the plate cap: 4 117640, a rigid but lightweight housing structure is formed at the end of the roll, which can be easily supported by the projection shaft. At the same time, the deflection of the projection shaft is even smaller.

In the lightly loaded roll of the invention, a simple projection shaft 14 can be used, which can be supported in many different ways. In Figures 3 and 4, the end plate 13 and the projection shaft 14 are separately machined rotary bodies. The projection shaft is a casting here which is machined. Instead, the end plate 10 may even be a sheet material having a hole for the projection shaft.

Separate pieces are simple to manufacture and can be precisely dimensioned for each application.

The structure of a disc may vary from application to application. Figures 15 3 and 4 show a curved uniform sheet body 19 which, like the casing 10, is a sheet metal material. This allows the desired shapes to be easily obtained in the structures and new methods for joining the pieces can be used. According to the invention, there is a force-closed joint between the end plate 13 and the projection shaft 14.

20 In practice, the projection shaft 14 is preferably fitted to the end plate 13 by a shrink connection. This allows the positioning between them to be maintained • · • * ·· accurately and even if necessary to change the projection axis. In the application of Figure · · 3, the connection of the plate member 19 to the cantilever shaft 14 •: * · is secured by a weld illustrated by the arrows in Figure 3. The 25 female moment of the shaft ·····, · * ·. through.

* · * ··

In general, the plate body according to the invention is curved or tapered. The conical plate body 19 is shown in Figure 5.

• ·; * 30 The same reference numbers are used for functionally similar parts. In addition to formatting a disc, its layout may vary from application to application. Figure 3 shaped sheet 19 h · *. is adapted to open from the opposite end of it • · · l *. away from you. Correspondingly, in Fig. 4, the plate body 19 opens opposite. j • * ·. ·. ·:> '* 35 lanes per end piece. In the embodiment of Figure 3, the plate body is contained within the sheath so that the total length of the roll is as short as possible. In this case, the roll can also be fitted in narrow positions. Instead, in the embodiment of Figure 4, the plate body is an extension of the sheath, whereby the free length of the cantilever shaft is as short as possible. This prevents unfavorable bending of the projection shaft.

5

In addition to using a separate cantilever shaft and plate member, the different parts are joined together in a new way. According to the invention, the joint 10 of the sheath 10, the end plate 13 and the plate body 19 has a joint weld 16 which is made from the outside of the sheath 10 at the points indicated by arrows 10. In Figure 3, the plate member 19 is attached to the inner surface of the sheath 10. In addition, the end plate 13 is set to both the sheath 10 and the plate piece 19. In this case, the welding point of the arrow, all three pieces can be attached to each other quickly and simply. In other words, the shell 15 10, the end plate 13 and the plate body 19 are simultaneously welded together. The same principle is also realized in Fig. 4, in which the plate body 19 is end-facing with the casing 10. The end plate 13 is located at this junction of the sheath 10 and the plate body 19, whereby the welding joint 16 securely connects the pieces. Figure 4 20 also shows a mounting sleeve 17, welded to the plate body.

• t »V · to which the cantilever shaft 14 is connected by a force-closed connection.

** * * • »ft

Also, in the embodiment of Figure 5, the * · • ** j mounting sleeve described above may be used. Here, however, the conical plate member 19 is fitted directly to the protruding shaft 14. According to the invention, a damping and / or insulating material 24 'may additionally be provided in the space defined by the sheath 10 and the end pieces 11. In this case, the sheath will remain firmly round and the material will effectively prevent • · * vibration of the sheath. The material used is, for example, styrofoam, • * * ··· * 30 foam or other relatively lightweight material. The cellular structure is lightweight, but has sufficient rigidity for the •; ***. to achieve. Also, the end plate 13 and the plate piece 19

III

, ·, Damping and / or insulating can be provided in this space

III

· *** Material 24. The material further increases the stiffness of the conical koi • 35 miocells, while reducing roll vibration.

The material is mounted on solid pieces of roll 117640

S

or may be extruded, for example, into a finished roll.

Usually the diameter of the roll according to the invention is less than 500 mm.

According to the invention, the sheet body 19 is roll-formed and / or deep-drawn from sheet metal material. In practice, the sheet piece can be made from a single blank, whereby the sheet piece becomes seamless. The rolled or deep drawn sheet body also retains its shape well, which further improves the stiffness of the roll. On the other hand, the plate body 10 can be made from one or more parts by welding. Casting parts, such as the projection shaft, are manufactured by conventional methods of casting and machining. Instead, laser cutting is used in addition to the previous molding techniques to manufacture the diaper and sheet body. Thus, even sheet metal material having a thickness of less than 5 mm can be used.

In addition to easy formability, the sheet material can be welded with a laser for good results. According to the invention, the plate body is then attached to the sheath and the end plate by laser welding. Also, the securing weld of the projection shaft and the plate body can be made with 20 lasers. The welding points are indicated by small arrows in Figures 3 - * · · • · e 5. · * * * ··· · ·: \ I Using laser cutting and welding, the roll can • easily measure and shape. In this case, the roll is unmachined • · · · ··· 25 ready for use. If necessary, the circularity of the roller is • · · · ', * · *. The coating 20 is shown in Fig. 4. At the same time, for example, grooves can be machined into the coating, the shape and dimension of which can be selected as required.

, Other roll machining is often unnecessary because of the • • *; · * 30-free laser welding that results in a very smooth joint.

• * • · • · · *: ***; Thanks to the new end piece, you can also use emotional * * *. non-standard bearings. According to the invention, the bearing 12 • · · * * *; *, be attached either to the projection shaft 14 or to the plate member 19.

On the other hand, the bearing can be secured to both the plate member 19 and the end plate 13. In Figures 3 and 4, the projection shaft 14 is attached to the end member 11, whereby the bearing 12 is secured to the projection shaft 14 as shown in Fig. 2a. 6. Instead, in Fig. 2b, the projection shaft 14 is non-rotatable, with the bearing 5 pivoting 12 either in the plate body or end plate or both. By providing at least two support surfaces in the at least one end body 11, the bearing 12 or protrusion shaft 14 can be offset In Fig. 1 2b, the non-rotatable cantilever shaft 14 is rotated so that the position of the roller 10 can be changed. Here only one pivot point 21 is rotated, but most degrees of freedom can be adjusted to the support and pivot and the necessary movements are performed la (not shown).

In practice, the bearing 12 is provided with at least two bearings 18 which are spaced axially apart to form support surfaces. Hereby, two simple bearings provide easily needed support surfaces. At the left end of the roll of Figure 6 are two bearings 18 supported by J

20 through the rocking member 23 to the structures of the forming machine.

% m · *. · · Also a corresponding nail could be fitted to the other end of the roll, but the angle change of the cantilever shaft could be achieved using one special bearing.

In general, the roll according to the invention is light but * * * *.

. ···. stiff. In addition, roller fabrication is simpler and cheaper. At the same time, the specific frequency of the roll increases, thereby reducing its vibration sensitivity. In addition, the cantilever shaft can be more freely selected, allowing smaller smaller shaft diameters to be used. At the same time, there will be more freedom in the choice of bearings. The roller and end piece., 'J • · *** · can also be fitted with damping. In addition, even the deflection * * *, * of the roll can be compensated.

«· * *« * • · • «··· ♦ *

Claims (18)

117640 A guide roll for a web forming machine, which guide roll (15, 15 ') includes a 5. sheath (10) of sheet material, - at both ends of the jacket (10) for rotatably supporting the guide roll (15, 15') with bearings (12) in the web forming machine. and - in each end piece (11) an end plate (13) and a projection shaft (14) therein for bearing (12), characterized in that the end plate (13) and the projection shaft (14) are arranged in separate pieces and in addition the end plate (13) 14) at least one shaped plate piece (19) is disposed axially apart from the point of contact of the end plate (13) and the projection shaft (14). Guide roll according to Claim 1, characterized in that the end plate (13) and the projection shaft (14) are rotationally machined pieces. 20 A guide roll according to claim 1 or 2, characterized in that the sheath (10) and the plate body (19) are made of sheet metal material. • · • »· • · · • • •!! '! ! 25 Guide roller according to one of Claims 1 to 3, characterized in that the end plate (13) and the projection shaft (14) • IM, ···. there is a power-operated joint between them. A guide roll according to any one of claims 1 to 4, characterized in that the casing (10), the end plate (13) and the plate body (19) ) at the junction there is a connecting weld (16) for connecting the jacket (10), the end plate (13) and the plate body (19). A guide roll according to any one of claims 1 to 5, characterized in that the guide rolls (15, 15 ') have shaped plate pieces, ·, · · · · · · · · · · · · · · · 19) is adapted to open either towards or away from the opposite end piece (11). 117640 Guide roll according to one of Claims 1 to 6, characterized in that the plate body (19) is curved or conical. Guide roll according to one of Claims 1 to 7, characterized in that damping and / or insulating material (24 ') is provided in the space defined by the sheath (10) and the end pieces (11). Guide roll according to one of Claims 1 to 8, characterized in that damping and / or insulating material (24) is provided in the space defined by the end plate (13) and the plate body (19). Guide roll according to one of Claims 1 to 9, characterized in that the guide roll (15) is a roll in contact with the paper. Guide roll according to one of claims 1 to 9, characterized in that the guide roll (15 ') is a roll in contact with the tissue. ··· • · 1 · · · ··· 1 ·· 12. A method of making a guide roll for a web forming machine, wherein; 1 - 25 - making the jacket (10) of sheet material, ··· · - making the end pieces (11) arranged in each. the end plate (13) and the projection shaft (14) for the bearing (12) • ·, and / - attach the end pieces (11) to both ends of the housing (10) • 1 1 ···· 30, the end plate (13) and the projection shaft (14) are disposed in separate pieces and joined by at least one * ·· * ... shaped sheet metal member (19) to form a housing structure. • · • · · o c · • · · • · 117640 Method according to Claim 12, characterized in that the sheath (10), the end plate (13) and the plate body (19) are welded to one another at the same time. Method according to Claim 12 or 13, characterized in that the sheet body (19) is roll-formed and / or deep-drawn from sheet metal material or made by welding one or more parts. Method according to one of Claims 12 to 14, characterized in that the circularity of the guide roll (15, 15 ') is arranged as desired by coating the jacket (10). Method according to one of Claims 12 to 15, characterized in that the bearing (12) is attached to either the projection shaft (14) or the plate body (19) or the plate body (19) and the end plate (13). A method of driving a guide roll in a web forming machine 20, wherein the guide roll (15, 15 ') is rotatably supported by bearings (12) on a web forming machine, for which the guide roll (15, 15') includes • · · *. . - a sheet material jacket (10), an end plate (11) at both ends of the diaper (10), and • · · ii: 25 - an end plate (13) at each end piece (11) and therein. * protruding shaft (14) for bearing (12), · · al ": characterized in that at least one end piece (11) is provided with at least two bearing surfaces for bearing (12), and the bearing (12) or protruding shaft (14) is pivoted. · 30 (15, 15 ') to compensate for the deflection. The method according to claim 17, characterized in that the bearing (12) is provided with at least two bearings t (18) which are arranged axially spaced apart to form support surfaces . * · Φ * * · • Φ 1 117640