JPH08294853A - Two-side polishing device of metal band material - Google Patents

Abstract

PURPOSE: To reform the front and rear surfaces of a metal band decorationally or functionally by furnishing an inversive roll mechanism for inverting the main surface of metal band on a polishing pass line between two polishing parts. CONSTITUTION: The surface of a stainless steel plate S is subjected to a specified polishing process made by the first polishing part 17. If the polished surface is to be rinsed, a rinsing trough 18 may be provided. Then inversion of the stainless steel plate S is made via rolls 11a, 11b, 11c, 11d of an inversive roll mechanism. The stainless steel plate S is fed to the second polishing part 20, and the rear surface is subjected to a specified polishing process. The plate is further sent to a rinsing trough 21 so that the polished rear surface is rinsed, followed by drying by a dryer 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-side polishing apparatus for the purpose of decoratively or functionally modifying the front and back surfaces (both main surfaces) of a metal strip material such as a stainless steel plate, and for removing flaws.

[0002]

2. Description of the Related Art Conventionally, in the case of surface polishing of a metal strip material such as a stainless steel plate, it is common to polish the surface called the guarantee surface or the usage surface and the back surface thereof. This back surface polishing is to maintain a balance with the strain introduced into the steel sheet by the surface polishing, and if back surface polishing is omitted, the shape of the steel sheet such as warpage will collapse and inconvenience will occur in use. This backside or non-use side polishing is usually referred to as "abrasive polishing" and is not generally guaranteed in quality. Further, even if a stainless steel plate is guaranteed on one side, if there is a flaw on the surface (generally impossible to guarantee 100% of the total coil length), there is a demand for using the yield upper and lower surfaces. However, if the quality of the front and back surfaces is different, the back surface cannot be used, and the yield is reduced, which is uneconomical. Therefore, in order to avoid such an uneconomical situation, or in applications where the front and back surfaces (both main surfaces) of stainless steel plates such as building materials and furniture are used as various doors, the quality of both front and back surfaces of metal strips In consideration of the case where is required, etc., it has been relatively frequently performed to pass the same line twice to guarantee quality on both sides.

However, the method of passing through the same line twice is inefficient and inferior in productivity. Even if two identical lines are provided to increase productivity, the equipment cost doubles, Particularly in the case of thin-material polishing, there is a problem that buckling breakage may be promoted due to the difference in temperature between the inside and outside of the steel strip when the heat of polishing is cooled.

In order to avoid this problem, there has also been proposed an apparatus for performing double-sided guaranteed polishing on both front and back surfaces of a metal strip with one polishing pass line. Fig. 2 shows one of the double-sided polishing machines.
An example is schematically shown, in which a stainless steel plate S is provided on a polishing pass line between a payoff reel 1 in which a stainless steel plate S is wound in advance and a recoiler 2 for winding the stainless steel plate S after double-side polishing. A first polishing device 5 including a polishing member 3 arranged on the upper surface side of the steel plate S for polishing one of the main surfaces (upper surface) and a pressing roll 4 provided facing the lower surface side of the steel plate S; Stainless steel plate S on the downstream side
A second polishing device 6 including a polishing member 3 arranged on the lower surface side of the steel plate S for polishing the other main surface (lower surface) and a pressing roll 4 provided facing the upper surface side of the steel plate S. It is provided. Further, the pair of polishing member and the pressing roll,
Some are alternately placed in opposite positions.

[0005]

As shown in FIG. 2, in this conventional double-sided polishing apparatus, the back surface polishing of the stainless steel plate S is arranged at a position opposite to that of the front surface polishing apparatus (first polishing apparatus 5). It is difficult to make the qualities of the front and back surfaces uniform because, for example, the supply of polishing oil is upward, and the difference is different from that during surface polishing. Even if you precisely control the amount and supply method of polishing oil,
However, it is not easy to make the front and back surfaces of the same quality because of technical uneasiness. Furthermore, the operator needs to visually check the surface condition after polishing and control the polishing conditions.However, since the polishing condition of the back surface in such an apparatus must be seen from below, the condition of the back surface can be visually checked accurately. It was not easy to grasp, and there was a problem that the quality of the back surface was likely to be uneven. There are cases where the back side is reflected in a mirror and viewed from above, but it is still difficult to grasp accurately because the working environment is generally poor, such as the scattering of polishing oil.

In view of the above, there has been a demand for the development of an economical and accurate polishing technique for a metal strip material such as a stainless steel plate in order to meet the recently increasing double-sided guarantee. Therefore, an object of the present invention is to provide a double-sided polishing apparatus capable of efficiently polishing both sides of a metal strip with a single polishing pass line with high accuracy.

[0007]

In order to achieve the above object, the present invention is to polish one main surface of a metal strip, then invert the metal strip through a roll, and then to reverse the other of the metal strip. By polishing the main surface, the means for polishing both the front and back surfaces is performed with the polishing member always located above the polishing pass line.

That is, according to the present invention, the first polishing section for polishing one main surface of the metal strip, and the second polishing section for polishing the other main surface of the metal strip subsequently. In a double-sided polishing apparatus for metal strips, which is connected to one polishing pass line, the polishing member of the polishing machine in the first polishing section is in contact with one main surface of the metal strip from above. And a reversing roll mechanism for reversing the main surface of the metal strip is provided in the polishing pass line between the first polishing section and the second polishing section. In the double-sided polishing apparatus for a metal strip, the polishing member of the polishing machine is provided so as to contact the other main surface of the metal strip reversed by the reversing roll mechanism from above as well. .

[0009]

In the apparatus of the present invention, both the front and back surfaces of the metal strip are positioned upward during conveyance of the polishing pass line, and the same polishing mechanism is used to polish the metal strip from the upper side under the same conditions. The same quality can be easily obtained on the front and back surfaces.

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a diagram schematically showing a double-sided polishing apparatus for metal strips according to the present invention. In the figure, 10 is a payoff reel in which a stainless steel plate S is wound in advance. It is adapted to be wound around the recoiler 13 via various devices necessary for passing the plate and a reversing roll mechanism composed of a plurality of rolls 11a, 11b, 11c and 11d. More specifically, the stainless steel plate S is first sent out in the direction of arrow a by the pinch roll 14 along the polishing path line (the same as the line shown by the stainless steel plate S), and then the leveler 15, the welding machine 16, etc. are required. It is sent to the first polishing section 17 through the processing device, where a predetermined polishing is applied to one main surface (front surface) of the stainless steel plate S. When cleaning one polished main surface (front surface), a cleaning tank 18 can be provided as necessary. After that, a reversing roll mechanism including a plurality of rolls (in the illustrated example, four rolls 11a, 11b,
11c and 11d), the stainless steel plate S is inverted, and then sent to the second polishing section 20 to perform a predetermined polishing on the other main surface (back surface) of the stainless steel plate S. After that, it is further sent to a cleaning tank 21, where the polished main surface (back surface) is cleaned, then dried by a dryer 22, and further passed through a pinch roll 23 and a skin pass mill 24 to smooth the stainless steel plate S. (Blind) and added value is added.
It is designed to be wound around the recoiler 13.

Here, as a constitution of the first polishing section 17, a billy roll (pressing roll) is arranged below the stainless steel plate S as shown in the figure for maintaining a braking angle optimum for polishing. 17a, a contact roll 17b arranged on the upper surface of the stainless steel plate S so as to form a pair with the billy roll 17a, a tension roll 17c arranged above the contact roll 17b, a contact roll 17b and a tension roll. Polishing machines 17-1, 17-2, 17-3 ... Comprised of a polishing belt 17d hung around 17c and an enclosure 17e provided to prevent scattering of polishing oil (the number of polishing machines is limited. In the case shown, three cases are illustrated for simplification of the description).
The configuration of the second polishing unit 20 is also similar to that of the first polishing unit 17 described above, and the billy roll (pressing roll) 20a disposed below the stainless steel plate S and the billy roll 20a are opposed to each other. In this way, the contact roll 20b arranged on the upper surface of the stainless steel plate S, the tension roll 20c arranged above the contact roll 20b, and the polishing belt 20d stretched over the contact roll 20b and the tension roll 20c. , And a plurality of polishing machines 20-1, 20-2, 20-3, ...

In the above apparatus, an example in which a polishing belt is used as the polishing member has been described, but a polishing roll may be used instead of the polishing belt. Further, although the example in which the leveler 15, the welder 16 and the like are used as various devices necessary for passing the plate has been described, other processing devices may be provided in the pass line instead of these or together with these, if necessary. Good. For example, the above apparatus is mainly used for surface finishing No. The target is polishing of 3 to # 400 (JIS G4305), but if polishing such as hairline (HL) or flaw removal grinding of band material is required, polishing with similar arrangement in this device A mechanism may be installed. By selectively arranging desired polishing machines in this way, different finishing specifications can be applied to the front and back surfaces of the coil material.

Further, the cleaning tank 1 is provided at a required position in this apparatus.
8 and 21 and a skin pass mill 24 are provided, but the polishing oil is washed in the washing tanks 18 and 21 to clean the stainless steel plate S. The skin pass mill is for smoothing (grinding) the polished surface to give added value, and its purpose is slightly different from that of the skin pass for adjusting the material and improving the surface gloss which are usually used in the production of stainless steel sheets. No. is used for smoothing. By applying it to a polished surface such as 4 finish, it produces a unique surface property. The smoothing process integrated in the line promotes the improvement of surface quality and productivity. Incidentally, the double-sided polishing apparatus of the present invention is a stainless steel plate, aluminum, aluminum alloy,
It can be applied to polishing any other metal strip such as titanium and titanium alloy.

[0014]

EXAMPLE A stainless coil material that was double-side polished using a conventional double-side polishing apparatus as shown in FIG. 2 was compared with a stainless coil material that was double-side polished using the double-side polishing apparatus of the present invention shown in FIG. The results are shown in Table 1. The test material was a SUS304 / 2B coil material, and No. Four
Both sides were polished for finishing. The plate passing speed is 25m
/ Min.

[0015]

[Table 1]

As can be seen from Table 1, the stainless steel coil material polished by the apparatus of the present invention has good quality on both the front and back surfaces, so that both sides can be guaranteed, and the superiority to the conventional apparatus is clear. there were.

[0017]

As described above, the quality of the metal strip obtained by the double-sided polishing apparatus of the present invention is greatly improved as compared with the one obtained by the conventional method, and the front and back surfaces are uniform. It should be noted that the back surface polished with a polishing material located below the polishing pass line in a conventional double-sided polishing machine generally has a drawback that the occurrence of flaws is likely to be delayed, so that the yield as a double-sided guarantee material decreases. In the double-sided polishing device of the present invention,
There is no such fear. Further, even when the metal strip is used with one-sided guarantee, if the metal strip that can be guaranteed on both sides is manufactured according to the present invention, the back side can be used even if there is a flaw, and therefore the yield is large. You can get benefits.

[Brief description of drawings]

FIG. 1 is a view schematically showing a double-sided polishing device of the present invention.

FIG. 2 is a diagram schematically showing a conventional double-side polishing apparatus.

[Explanation of symbols]

 10 ... Payoff reel 11a-11d ... Roll 13 ... Recoiler 14 ... Pinch roll 15 ... Leveler 16 ... Welding machine 17 ... 1st grinding | polishing part 17a ... Billy roll 17b ... Contact roll 17c ... Tension roll 17d ... Polishing belt 17-1, 17-2, 17-3 ... Polishing machine 18 ... Cleaning tank 20 ... Second polishing section 20a ... Billy roll 20b ... Contact roll 20c ... Tension roll 20d ... Polishing belt 20-1, 20-2, 20-3 ... Polishing Machine 21 ... Washing tank 22 ... Dryer 23 ... Pinch roll 24 ... Skin pass mill

Claims (2)

[Claims] 1. A first polishing section for polishing one main surface of a metal strip, and a second polishing section for polishing the other main surface of the metal strip. In a double-sided polishing apparatus for metal strips connected to a polishing pass line, a polishing member of a polishing machine in the first polishing section is provided so as to contact one main surface of the metal strip from above. , The first
An inversion roll mechanism for inverting the main surface of the metal strip is provided in the polishing pass line between the second polishing section and the second polishing section, and the polishing member of the polishing machine in the second polishing section is A double-sided polishing apparatus for a metal strip, which is provided so as to be in contact with the other main surface of the metal strip reversed by a reversing roll mechanism from above as well. 2. The second at least in the polishing pass line
2. The metal strip according to claim 1, wherein a cleaning tank for cleaning the metal strip and a skin pass mill for adjusting the surface texture of the metal strip are arranged downstream of the polishing section of the metal strip. Double-sided polishing machine for materials.