FI84087C - Device for insertion of the tip strip into the inlet box of a paper machine and insertion method - Google Patents

Description

84087

Paper machine headbox top rail repair apparatus and repair method

Anordning för istandsättning av spetslisten i inloppslädan 5 av en pappersmaskin och iständsättningsförfarande

The invention relates to a device and a method of repairing a top list of a paper machine headbox.

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In prior art solutions, the top strip of the top lip bar of the paper machine headbox has been removed for refurbishment. The top strip has been taken to a separate refurbishment treatment workshop. Renovation has become a very expensive operation. It is therefore an object of the invention to improve the above-mentioned top strip renovation problem. The invention has been realized for refurbishing a top strip on site in a paper machine without removing the top strip from the top lip bar of the headbox.

The device according to the invention for rehabilitating the top list 20 of a paper machine headbox is mainly characterized in that the device comprises means on which it can be moved across the width of the lower lip bar and on the lower lip bar, the grinding wheel being controlled by

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The method according to the invention for repairing a paper machine headbox tip strip is mainly characterized in that the method controls the grinder and the tool tip strip repair tool so that the device is controlled from the upper surface of the becomes high precision uniform.

The invention will now be described with reference to some preferred embodiments of the invention shown in the figures of the accompanying drawings 35, to which, however, the invention is not intended to be exclusively limited.

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Figure 1 illustrates a method according to the invention and an apparatus according to the invention. Shown is a grinding machine for processing a top strip, which according to the invention receives control from the lip-bar bottom-5 lip bar of a paper machine.

Figure 2 shows the method of grinding the tip strip axonometrically. Figure 3 shows another preferred embodiment of the device.

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Figure 4 illustrates the grinding result with the shape of the tip strip corresponding to the shape of the lower lip beam with the lip opening being of uniform height with high accuracy.

As shown in Figure 1, the tip strip repair device 10 according to the invention comprises a body 11 and a drive motor 12 adapted to rotate a grinding wheel 14 connected to the shaft 13. The grinding wheel 14 is a so-called a shaping disc which fits into the tip strip P so that the side Kj of the grinding wheel hits the side Lx of the strip and the side K2 of the grinding wheel hits the side 1¾ of the strip 20. The angle between the sides Kt and K2 is about 47 ° and larger than the angle between the sides Lx and 1 ^ of the tip strip, which is about 45 °. The body 11 of the device further comprises sliding means 15, for example rotating bearings, on which the device can be moved on the lower lip beam H from the width of the beam.

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2, the device taken in the direction of arrow H on the bottom slice beam. The device thus obtains its control from the lower lip bar H1 over its entire width E. The distance of the tip Di of the tip strip D of the upper lip bar H2 from the lower lip bar H! by the grinding method according to the invention, the lip 30 of the head of the paper machine is also made constant with high accuracy.

Figure 3 shows another preferred embodiment of the grinding device. In the embodiment, the shaft 13 of the motor 12 is adjustable to its angular position 35 with the upper part 11a of the body 11 being pivotable on the ball joint 16 relative to the lower body 11b. The rotating motor 12 of the grinding wheel can be a 3 84087 1 pneumatic rotating motor or an electric motor. The device is moved manually on the lower lip bar H. The device is self-centering, so no separate controllers are needed.

5 In addition to the fact that the tip strip does not need to be removed for refurbishment, the in-situ grinding method increases the life of the tip strip and reduces paper machine downtime due to maintenance in general. Thus, the device and method according to the invention offer clear savings over prior art solutions.

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Figure 4 shows and illustrates the shape of the tip of the tip strip and its correspondence with the shape of the lower lip beam. The method makes the lip opening uniform with great precision. In the method, the tip Dx of the tip strip D is given the same shape in the longitudinal direction as the lower lip beam has in its longitudinal direction. In this way, the lip opening becomes uniform with great precision.

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Claims (7)

A tip insertion device (D) in the upper lip beam of an inlet tray of a paper machine, comprising a body (11) and a drive motor (12) therein, arranged to bring the shaft (13) of a grinding wheel ( 14) and the abrasive disc (14) therein rotating, characterized in that the device comprises means (15) supported by which it can be moved over the width of the lower lip beam (H) and on top of the lower lip beam (H). ), wherein the grinding disc (14) receives its control from the lower lip beam (H,), whereby the distance of the tip (D,) of the tip stone (D) from the lower lip beam (H,) can be standardized. Device according to claim 1, characterized in that the means (15) for controlling the device along the lower lip beam (H,) are caused to rotate from the stored rollers. 3. Device according to any one of the preceding claims, characterized in that the grinding wheel (14) consists of a so-called. molding disc, which includes abrasive surfaces (K 1, K 2) which can be affixed to surface planes (L 2, L :) of the tip (D 1) of the tip strip (D) the grinding wheel (14) Something said when corresponds to the winkkein between the adjacent sides (L 1, L 2) of the tip of the tip strip or it is advantageously slightly larger than this. 25 Device according to any of the preceding claims, characterized in that the device comprises a pneumatic motor as a rotary motor (12) for the grinding wheel (14). 5. Device according to any of the preceding claims, characterized in that the device comprises an electric motor as a rotary motor for the grinding wheel (14). Device according to any one of the preceding claims, characterized in that the device comprises a joint (16) by means of which the abrasive disc can be directed in the correct position in relation to the tip strip (D) of the upper lip beam. (H2). 7. Method of inserting the tip strip (D) into the upper lip beam (Hj) in the inlet carriage of a paper machine at the site without releasing the tip strip from the inlet carriage, characterized in that in the process the abrasive device and the tip strip are controlled by the device. The tool and tool son make the fixing strip and the device in such a way that the device for its control from the upper surface of the lower lip beam (H,) of the inlet carriage of the paper machine, thereby giving the tip of the tip strip the same shape in the longitudinal direction as it does. the lower lip bar has its longitudinal direction, with the lip opening becoming even with great accuracy.