JPS6056861A - Method of hot grinding roll - Google Patents

Abstract

PURPOSE:To prevent grinding accuracy from errors in practical use by such a grinding constitution as the grinding surface of a roll member discharges grinding liquid controlled to the same temperature as that of said surface when used practically. CONSTITUTION:A roll 1 for a paper machine has usually dummy heads 2 incorporated in both sides and supported by gun metal bearings 3. On the other hand, grinding liquid 7 in a tank 6 is heated by vapor supplied from a vaper piping 13, a heater or the like and discharged from a discharge port 9 through a coolant unit 5 of a grinding machine 8 onto the grinding surfaces the roll 1 and of a grinding wheel 10. Since the roll 1 is thus ground at the temperature in the use of the machine, the working accuracy in the use of the machine can be regenerated to prevent the grinding accuracy from errors in the practical use.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll heating grinding method intended to improve the grinding accuracy of paper machines and the like.

Normally, the grinding process of the roll for the Shoji machine is carried out using a cylindrical grinder at room temperature. However, if the roll is attached to all the equipment after grinding, depending on the location where it is used, the surrounding area of the roll and the roll As the temperature of the surface atmosphere rises to around 60℃, the grinding force at room temperature (1) thermal deformation of the roll occurs (2) the accuracy during grinding at room temperature becomes distorted (3) these It is difficult to predict the amount of deformation, and as a result, the thickness of the paper produced becomes uneven, and if this occurs over a wide area or noticeably, it can cause damage such as the unusability of the product. I'm inviting you.

The present invention aims to eliminate such drawbacks and provide a roll heating grinding method that does not cause fluctuations in grinding accuracy in actual use. The grinding method is characterized in that a grinding liquid controlled at the same temperature as the temperature at which the grinding surface of the roll member is actually used is discharged onto the grinding surface of the roll member to be ground.

Hereinafter, the method for heating and grinding a roll according to the present invention will be explained based on the embodiment shown in Figure 5.

Fig. 1 (a) ←) is a plan view and a side view (partially cut away) showing the roll member l, and Fig. 2 is a side view (partially a sectional view). Normally, dummy head 2
There are built-in trenches on both sides of roll 1, and dummy head 2
It's the boat with Gunkinsu Bearing Mekuru 3! are doing. On the other hand, the rDf cutting fluid 7 in the tank 6 is heated by air supplied from the steam pipe 13 or by a heater, etc., and passes through the coolant device 5 of the grinding machine 8 to the roll 1 and the grinding wheel 0 from the discharge port 9. is discharged onto the grinding surface.

This grinding fluid 7 is temporarily stored in a tank 4 installed under the roll, and the full-scale heating of the roll is carried out.
L. The tank 4 is provided with an overflow hole 11 at the top, and from here, the grinding fluid 7 is supplied via a recovery pipe 12.
is collected into tank 6. When this cycle is being carried out continuously, the roll l is processed by the grinding wheel 10).

As explained above with reference to the embodiment shown in the drawings, according to the roll heating grinding method according to the present invention, the roll is ground at the temperature when the grinder is used. Sometimes the 3rd degree is reproduced. Therefore, if accuracy is ensured during heating processing, desirable roll accuracy can be obtained when using the equipment. Since there is no change in carbonization when using the device, uneven paper thickness may occur.
Partial dampness stains on the paper or the paper being cut during rewinding in the winder part can lead to a decrease in operating efficiency, and in severe cases, paper that cannot be used as a product is no longer produced.

In practice, as a result of heating and grinding paper machine and calender rolls to 60°C, which is the surface temperature of the rolls when the equipment is in use, we have found that the only products that can be used in the past are those with uneven thickness or partial moisture. It has been reported that it has completely disappeared.

[Brief explanation of the drawing]

FIG. 1(a) is a plan view and a side view (partially cut away) showing the roll member, and FIG. 2 is a side view (partially a tcIr view). In the drawing, 1 is a roll, 4.6 is a tank, 7 is a grinding fluid, and io is a grinding wheel. Patent Applicant: Sansho Kankoto Co., Ltd., Patent Attorney: Shibu Mitsuishi (1 person) Figure 1 Figure 2

Claims (1)

[Claims] Grinding is performed by discharging a grinding fluid controlled to the same temperature as the temperature at which the grinding surface of the roll member is actually used, onto the grinding surface of the roll member to be ground by a grinding wheel. A roll heating grinding method featuring: