FI84890B - Process for repairing the roller surface of a roller in a papermaking machine and device for repairing a roller surface - Google Patents

Description

84890

Paper machine roll roll surface restoration method and roll surface restoration device Förfarande för istAndsättning av valsytan av en Roll 5 i en pappersmaskin och anordning för istAndsättning av en rolled

The invention relates to a method for repairing a roll surface and to a device used in method 10.

In connection with the repair of local damage to the rolls of paper machines, there has been a need to machine the damage point. Until now, for example, in the case where a foreign object has passed through the press section 15 through the nip, causing local damage to the roll, the repair has required a lot of heavy and time-consuming manual machining.

If the roll surface is to be refurbished at the factory on site, it has so far been made entirely by hand and with hand tools. The 20 hand-made renovations have been time-consuming. Also, the outcome of the work has not been optimal in all cases.

The object of the invention is therefore a method and a device with which it is possible to repair large rolls of a paper machine on site, in particular their local surface damage when the roll is in place on the paper machine.

. "·. In the invention, it has been realized to form a roll surface rehabilitation device which is guided by a guide arranged around a separate roll to run along the roll surface.

: 30

The method according to the invention for rehabilitating a roll on site in a roll application is mainly characterized in that the method controls and holds the machining unit by means of guide rollers or the like associated with the machining unit body, which are pressed against the roll surface and by at least one strip, by means of a strip passed around the roll, the guide rollers of the frame are pressed against the surface of the roll II.

2,84890

The device according to the invention for restoring a roll surface in place on a paper machine is mainly characterized in that the device comprises guide rollers connected to the processing unit body, on which the apparatus is supported on the roll surface and that the apparatus comprises at least one support strip wrapped around the roll.

The invention will now be described with reference to some preferred embodiments of the invention shown in the figures of the accompanying drawings, to which the invention is not intended to be exclusively limited.

Figure 1 shows a roll surface repair device according to the invention when viewed from the axial direction of the roll.

2 is shown in Figure 15 the device according to the invention of the arrow in Figure 1 as viewed from the direction Κχ.

Figure 3 shows a device according to the arrow 1 of Figure of Figure 1 viewed in the direction K2.

20

Figure 1 shows a roll surface repair device 10 according to the invention. The repair device 10 comprises a device body 11 and guide rollers 12 or the like articulated to rotate therein. The rollers 12 are preferably four pieces 12a, 12b, 12c, 12d.

25

The apparatus further comprises an endless belt strip 13 of steel arranged to run around the roll T. There are preferably two strips 13, strips 13a, 13b. According to the invention, the strips 13a, 13b are used to support the device 10 roll T against its surface Tx. The surface restoring device 10 of the roll-30 is thus adapted by means of a strip 13 to press against its wheels 12 on the roll surface Tlt

Another function of the strip 13a, 13b is to act as a guide and supply guide for the body 11 of the rehabilitation device 10. The apparatus comprises a belt guide wheel 16,::: 35 which is rotated from a crank 15. The crank 15 is mounted on the frame 11 by bearing means 14. Thus, by turning the crank 15, the frame 11 is fed curved along the roll surface in the circumferential direction of the roll as shown by arrow 1.

The belt tension is adjusted in the direction L2 of Fig. 1 by raising and lowering the 5 guide guide wheel 16 in the normal direction of the roller surface Ti.

Figure 2 shows the device of Figure 1 from the direction of the arrow Κχ a top view. As shown in the figure, the device comprises strips 13a and 13b and for them guide wheels 16 and chambers 15.

10 By turning the guide wheels 16 at the same time, the device is moved along the surface of the roller. (This direction of travel is shown in Figure 1 by an arrow.

As shown in Fig. 2, the machining unit 17 itself is moved in the area between the strips 13a and 13b. The apparatus comprises a so-called a cross table by means of which the tool 2 can be moved in the direction of the width of the roll as well as in the normal direction of the roll surface. In the area between the belts 13a and 13b, the movement of the tool along the width of the roll (arrow L3) 20 along the roll surface is provided by a screw device 18.

Figure 3 shows the apparatus of the arrow K2 in Figure 1. Hand wheel 18a is moved by rotating the machining unit 17 in the direction of arrow L3.

25

The apparatus further comprises, as shown in Fig. 3, a drive motor 19, preferably an electric motor, adapted via a bevel gear 20 to rotate the shaft 21 and a tool 22 at its end, e.g. an abrasive stone. The feeding of the tool 22 in the direction of the surface to be machined takes place 30 by means of a screw device 23. By rotating the handwheel 23a, the motor 19, the bevel gear 20, the shaft 21 and the tool 22 are raised and lowered as indicated by the arrow L *.

Therefore, the device is controlled as follows. The tool 22 is displaceable along the roll surface Ti in the circumferential direction of the roll (arrow L1 by rotating the drive wheel 16 from the crank 15. The tool 22 is further controllable by a feed movement (arrow Lg) between the belts 13a and 13b in the roll surface area using a screw device 18. the actual vertical feeding movement of the tool 22 is effected by means of a screw device 23 and the feeding takes place in the normal direction of the roll surface (arrow L4) perpendicular to the roll surface Tx. Speaking of the roll surface Tx also means the surfaces of the paper machine cylinders.

The device can be used to repair rollers, the surface of which can be, for example, hard-metal-coated, polyurethane-coated, etc.

10 li

Claims (9)

A method for repairing the roll surface of a paper machine roll, in particular local damage to it, when the roll is stationary in the paper machine, and 5 restoring the roll surface along the roll surface and using a tool (22) in the machining unit with a drive motor (19). the control and holding of the unit (17) takes place by means of guide rollers (12) or the like connected to the body part (11) of the machining unit (17), which are pressed against the roll surface (T 1) and by at least one strip (13), whereby the roll ( T) the guide rollers (12) of the body (11) are pressed against the roller surface (T ()) by means of a strip (13). Method according to Claim 1, characterized in that the machining unit (17) is moved between the strip (13) and the roll surface (T 1) in the circumferential direction of the roll (arrow L 1). Method according to Claim 1 or 2, characterized in that in the method the circumferential movement of the machining unit (17) 20 along the roll surface (T 1) takes place (arrow L 1) by rotating guide wheels (16) or the like, which guide wheels (16) rest on the belt. (13) to the surface. Method according to one of the preceding claims, characterized in that the method uses two strips (13a, 13b) threaded around the roll (T) and in that the machining unit (17) is moved in the area between the strips (13a, 13b) (arrow Lj) by means of a screw device (18) or a similar supply arrangement known per se. 30 Method according to one of the preceding claims, characterized in that the tool drive motor (19) of the machining unit (17) and the tool (22) rotated by it are fed in the normal direction (L4) of the roll surface by means of a screw device (23) or the like. . 35 β 84890 5,84890 An apparatus for repairing a roll surface, in particular a minor damage to a roll application at a roll site, the apparatus comprising a machining unit (17) and a drive motor (19) adapted to rotate a shaft (21) on which the roller surface repair tool (22) ) is characterized in that the device comprises guide rollers (12) connected to the body (11) of the machining unit (17), on which the apparatus is supported on a roll surface (T 1) and that the apparatus comprises at least one support strip (13) passed around the roll (T), by means of which the device is pressed onto the roll surface (T,) during the roll surface restoration drive. Apparatus for restoring a roll surface according to the preceding claim, characterized in that the apparatus comprises a belt (13) guide and feed wheel (16) arranged between the roll surface (T 1) and the lower surface of the belt 15, the rotating wheel (16) controlling the machining unit (17) in the circumferential direction of the roll along the roll surface (arrow L 1). Device for repairing a roll surface 20 according to one of the preceding claims, characterized in that the device comprises two strips (13a, 13b) which are wound endlessly around the roll (T) and that the device comprises guides or the like in the body (11) by means of a machining unit (17) is movable during machining in the area between the belts (13a, 13b) to provide a roll-wide feed movement to the tool (22) and that the apparatus comprises screwing devices (18) or the like which are fed from the handwheel 18a to the feed movement (Lj) (22) is provided. Roller surface repair device according to one of the preceding claims, characterized in that the apparatus comprises a gear (20) connected to the motor (19) and adapted to rotate the shaft (21) and the tool (22) connected thereto, and that the motor (19) , the gear (20) and the shaft (21) as well as the tool (22) can be raised and lowered in the normal direction (L4) of the roll surface by means of a screw device (23) or the like 35. i; 7 84890