JPH09300195A - Method for forming surface pattern on stainless steel strip - Google Patents

Abstract

(57) [Summary] A stainless steel strip 17 is continuously moved at a speed Vs as indicated by an arrow, and a polishing belt 13 is continuously rotated at a peripheral speed Vb as indicated by an arrow. At this time, the speedometer 16 monitors the speed Vs of the stainless steel strip 17 and sends the signal to the controller 15. The controller 15 controls the polishing belt 13
The rotation speed of the variable speed motor 14 is controlled so that the peripheral speed Vb of the variable speed motor is, for example, 100 × Vs. [Effect] By keeping the speed of the stainless steel strip constant and keeping the peripheral speed of the polishing belt at least 100 times the speed of the steel strip, a fine streak pattern can be easily obtained.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for forming a surface pattern on a stainless steel strip.

[0002]

2. Description of the Related Art Stainless steel strips are widely used for interior materials for buildings, exterior materials for trains, interior materials for elevators. This stainless steel strip is subjected to various surface treatments depending on the application. For example, "satin finish or matte finish" that roughens the skin in the rolling process, "No. 3 finish" that polishes and finishes up to 100 to 120, "No. 4 finish" that polishes up to 150 to 180 and continuous There are "HL (hairline) finishes" with hair-like polishing eyes.

The above-mentioned No. 3 and No. 3 The 4 finish is to mechanically polish the surface of the stainless steel strip with a polishing belt in which alumina abrasive grains having a designated particle size (for example, No. 120) are attached to the cloth belt.

This kind of technique is disclosed in, for example, Japanese Patent Laid-Open No. 3-264.
No. 259 “Grinding method for stainless steel strip” is proposed. This technique is used in a facility for grinding a stainless steel plate 2 hung between a pair of tension reels 1, 1 shown in FIG. 1 of the publication with endless paper grinding belts 3, 3, 3 in order to rotate the grinding belt. In the scratch pass, 850 to 1150 rpm, and in the finishing pass, 10
By setting the speed to 0 to 2000 rpm, the number of passes is reduced by 30% as compared with the conventional method, and the production capacity is improved by 20%.

[0005]

[Problems to be Solved by the Invention] 3 and No. 3 Four
In finishing, only the number of abrasive grains to be used is specified, and the speed of the stainless steel strip and the peripheral speed of the polishing belt are arbitrary. Therefore, conventionally, the speed of the stainless steel strip and the peripheral speed of the polishing belt have been determined in consideration of the capacity of the equipment, the life of the polishing belt, the required productivity, and the like. Therefore, the length of the grind may vary from rod to rod, or long grinds may be produced.

[0006] Quality requirements have become stricter, and today,
In particular, if the polishing stitches are too long, the pattern becomes rough, and the roughness and fluttering result in a loss of design.

[0007]

As a result of detailed investigation of the relationship between the polishing equipment and the finished surface, the present inventors have found that the relative speed of the polishing belt is a determining factor of the polishing mesh length. Therefore, the first aspect of the present invention is a method for forming a surface pattern on a stainless steel strip, which is characterized in that the length of the polishing mesh is controlled by controlling the peripheral speed of the polishing belt with respect to the speed of the stainless steel strip. By controlling the length of the grind, which has not received much attention in the past, it is possible to form a beautiful streak pattern on the surface of the stainless steel strip. For that purpose, the existing polishing apparatus only needs to be slightly modified, so that the equipment price can be suppressed.

According to a second aspect of the present invention, the peripheral speed of the polishing belt is kept at least 100 times the speed of the stainless steel strip so that the length of the polishing mesh is made shorter. By keeping the speed of the stainless steel strip constant and keeping the peripheral speed of the polishing belt at least 100 times the speed of the steel strip, a fine streak pattern can be easily obtained.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a principle diagram of a surface pattern forming apparatus for a stainless steel strip according to the present invention.
Supply reel 2, deflector roll 3, breaker roll 4, billy roll 5, breaker roll 6, deflector roll 7, take-up reel 8, contact roll 11, idler roll 12, polishing belt 13, variable speed motor 1
4, a control unit 15 and a speedometer 16. The polishing belt 13 is a cloth endless belt to which alumina abrasive grains are attached.

The operation of the surface pattern forming apparatus 1 having the above structure will be described below. In FIG. 1, the stainless steel strip 14
Is continuously moved at a speed Vs as indicated by an arrow, and the polishing belt 13 is continuously rotated at a peripheral speed Vb as indicated by an arrow. At this time, the speedometer 16 monitors the speed Vs of the stainless steel strip 17 and sends the signal to the controller 15. Control unit 15
Is the peripheral speed Vb of the polishing belt 13, for example, 100 × Vs
The rotation speed of the variable speed motor 14 is controlled so that

FIGS. 2 (a) and 2 (b) are diagrams showing the principle of forming streaky polishing stitches according to the present invention. In (a), when the stainless steel strip 17 is run as shown by the arrow and the polishing belt 13 is rotated as shown by the arrow, the abrasive grains 21 form the abrasive grain 31, and the next abrasive grain 22 forms the next abrasive grain 32. Engrave. At this time, the rear end portion of the previous polishing grain 31 is scraped off by the next abrasive grain 22, and as a result, polishing grains 31, 32 having the pitch P1 are formed.

(B) shows that the peripheral speed of the polishing belt 13 is set to a high speed (or the stainless steel strip 17 is set to a low speed), and the stainless steel strip 17 has an abrasive grain 22 following the abrasive grain 21 within an extremely short time. Therefore, the pitch P2 between the polishing eyes 31 and 32 becomes very small. Since the pitch P2 is small, the streaky polishing stitches are fine and the pattern is calm as a whole. On the other hand, when the polishing stitches are long, such as at the pitch P1, a dynamic pattern is obtained as a whole. Therefore, it is only necessary to change the length of the polishing stitch according to the purpose.

[0013]

EXAMPLES Experimental examples of the present invention will be described below, but the present invention is not limited to the experimental examples. The conditions of the experiment are as shown in Table 1.

[0014]

[Table 1]

That is, the stainless steel strip has a thickness of 2.0.
mm, width 90 mm, length 2,000 mm SUS30
4 and 2B products (No. 2B). In addition, No. 2B is a symbol indicating the degree of surface finish, which is "finished by cold rolling, then heat treatment, pickling or similar treatment, and then cold rolling to obtain an appropriate gloss".
It is a plate specified by.

The polishing belt is a belt to which # 150 alumina abrasive grains are adhered, and the grinding oil is a mineral-based grinding oil having a viscosity of 10 cst (centistokes).
The test was carried out at four kinds of peripheral speeds of 1300 and 1800 m / min, and the speed (moving speed) of the stainless steel strip (test base metal) was 5, 10, 15, 20, 25 at each peripheral speed.
There were 5 types of m / min.

FIG. 3 is a graph summarizing the results of the experimental examples, where the horizontal axis is the speed (Vs) of the test base material and the vertical axis is the polishing mesh length. ◯ is the polishing belt peripheral speed of 500 m / min, Δ is the The same 900 m / min, □ indicates the same 1300 m / min, and × indicates the same 1800 m / min. From this graph, it was confirmed that the larger the velocity Vs of the test base material, the longer the polishing stitches, and the greater the peripheral speed Vb of the polishing belt, the shorter the polishing stitches.

FIG. 4 is a graph showing the relationship between the speed ratio and the polishing length, where the horizontal axis is Vb / Vs, that is, the ratio of the peripheral speed of the polishing belt to the speed of the stainless steel strip, and the vertical axis is the polishing mesh. The length of the polishing belt is 500 m / mi.
n and ● are the same 900 m / min, △ are the same 1300 m / mi
n and ∇ show the values at the same 1800 m / min. The data shown in FIG. 3 and other data were processed to investigate the relationship. As a result of plotting the values, it is clear from the graph that the relationship is almost independent of the peripheral speed of the polishing belt.
We have succeeded in finding that the polishing length is determined by Vb / Vs.

In order to change Vb / Vs, either or both of Vs (speed of steel plate) and Vb (peripheral speed of belt) may be changed. To reduce the polishing length, Vs (speed of steel plate) may be decreased or Vb (peripheral speed of belt) may be increased. However, since Vs (speed of steel sheet) is proportional to the production amount of equipment, it is not practical to reduce it at the expense of productivity. Therefore, the device of FIG. 1 for changing Vb (the peripheral speed of the belt) is useful.

Further, a fine pattern is generally obtained with a polishing mesh length of 5 mm or less, though there are individual differences. As the polishing eye length decreases, the variation in the length of the polishing eyes decreases, and as a result, the polishing eye length can be reduced to make the polishing eye lengths uniform. For that, Vb / V
If s is 100, a pattern with a polishing mesh length of about 5 mm is obtained, and if Vb / Vs is 200, it is about 3 mm.
A pattern with a polishing grain length of about a degree can be obtained. Trendally, Vb
As / Vs is increased, a shorter polishing grain can be obtained, but as is clear from the graph, it has been found that even if Vb / Vs is 350, a notable effect is not obtained. Therefore,
Practically, Vb / Vs may be selected in the range of 100 to 350. By suppressing the upper limit of Vb (peripheral speed of the belt), enlargement of the equipment can be suppressed.

Although the above experiment was a wet method using grinding oil, the present invention can also be applied to a dry method using no grinding oil.

[0022]

The present invention has the following effects due to the above configuration. According to a first aspect of the present invention, there is provided a surface pattern forming method for a stainless steel strip, characterized in that the length of the polishing mesh is controlled by controlling the peripheral speed of the polishing belt with respect to the speed of the stainless steel strip. By controlling the length of the grind, which has not received much attention in the past, it is possible to form a beautiful streak pattern on the surface of the stainless steel strip. For that purpose, the existing polishing apparatus only needs to be slightly modified, so that the equipment price can be suppressed.

A second aspect of the present invention is characterized in that the peripheral speed of the polishing belt is kept at least 100 times the speed of the stainless steel strip so that the length of the polishing mesh is made shorter. By keeping the speed of the stainless steel strip constant and keeping the peripheral speed of the polishing belt at least 100 times the speed of the steel strip, a fine streak pattern can be easily obtained.

[Brief description of drawings]

FIG. 1 is a principle diagram of a surface pattern forming apparatus for a stainless steel strip according to the present invention.

FIG. 2 is a diagram showing the principle of formation of streaky polished eyes according to the present invention.

FIG. 3 is a graph summarizing the results of the experimental example.

FIG. 4 is a graph showing the relationship between the speed ratio and the polishing stitch length.

[Explanation of reference numerals] 1 ... Surface pattern forming device, 11 ... Contact roll, 12
... idler roll, 13 ... polishing belt, 14 ... variable speed motor, 15 ... control unit, 16 ... speedometer, 17 ... stainless steel strip, 31, 32 ... polishing eye.

Claims (2)

[Claims] 1. A pattern forming method for producing streak-like polishing marks by polishing a stainless steel strip with an endless polishing belt wound around a contact roll and an idler roll, the polishing belt corresponding to the speed of the stainless steel strip. A method for forming a surface pattern on a stainless steel strip, characterized in that the length of the polished mesh is controlled by controlling the peripheral speed of the. 2. The stainless steel strip according to claim 1, wherein the polishing belt is kept at a peripheral speed of at least 100 times the speed of the stainless steel strip so that the length of the polishing mesh is made shorter. Surface pattern formation method.