TW382700B - Method for forming a rounded shape of a stainless strip and a rolling mill therefor - Google Patents

Abstract

Producing a method for forming a rounded shape of a stainless strip and a rolling mill therefor to give stainless a rounded shape of strip within tolerance certainly and inexpensively. A distinctive feature of forming a rounded shape of a stainless strip is to give a desired curve in a rolling direction by rolling stainless with a pair of work rolls of rolling mill 5 whose center line average roughness on the surface of roll 20a is less than Ra:0.8~2.0 micro meter and that of roll 20b is less than Ra:0.20 micro meter. Difference in roughness on the surfaces of the paired work rolls produces difference in speed between the face and the back of materials. Thereby, stainless J is curved in a rolling direction with having surface rolled by slower speed, smooth surface on the inside.

Description

V. Description of the invention (A7 B7 The technical field to which the invention belongs: The present invention is roughly related to the arc-shaped forming method and rolling device for arc-shaped forming of stainless steel bars, and particularly to the storage of 3.5 pairs of magnetic disks such as flexible magnetic disks (light ) The manufacturing method of the automatic baffle material of the recording medium box and the calendering device for the automatic baffle material. Known skills: · As shown in the perspective view of the 3.5-inch floppy disk illustrated in Figure 5, the recording medium box 1 The box body 3 made of plastic, which is a magnetic disk of the recording medium, is composed of an automatic baffle material 4 which is slidably mounted on the box body 3. Recording is arranged below the automatic baffle material 4. A head or a detector for reproduction The insertion port has a structure that is opened only when it is used to protect the internal recording medium except for recording and reproduction. The automatic baffle material 4 is a metal material such as stainless steel that is rolled to a predetermined thickness and punched out. Bending molding. When the automatic baffle material is made of plastic, it is made by spray molding, etc. However, because plastic is easy to be charged, it collects dust around it. It is abraded and powdered due to its own sliding motion with the outside of the box. Therefore, the dust or abraded powder attached to the internal recording medium causes the recorded signal to be lost, and it is also prone to failure due to thermal deformation. These principles *, as the material of the magnetic disk case's automatic pallet, mainly use stainless steel thin metal strip material. However, the stainless steel automatic baffle material is reduced to the outer surface of the case body 3 when assembled to the case body 3 For the purpose of friction, there is a so-called "arc-shaped" circle (refer to Figure 6 (a)). / In order to assign stainless steel strips to the previous production line of automatic baffle materials, the paper size is applicable to China National Standard (CNS) A4 specifications (2 丨 0X297 mm)

V. Description of the invention (2) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs, the arc-shaped implementation of the following steps. First, as shown in Fig. 7, in a rolling step, the stainless steel bar B is rolled by a multi-stage rolling mill 5 to be processed into a stainless steel bar J of a desired thickness, and then rolled up. Then, in a degreasing step, the stainless steel bar J is degreased. Then, in the correction step, the stainless steel bar is processed with a tension leveler, and then rolled up into a roll shape by a curl correction device. This stainless steel bar wound into a reel shape is cut into strips of a predetermined width by a cutting step, and then manufactured. In addition, FIG. 6 is a summary of a test method for measuring the degree of circularity of a non-recorded steel rolled bar which is a raw material of an automatic baffle material, (a) is a measurement method showing an arc shape, and (b) is a measurement method showing an arc shape. The method of measuring the degree of curl (c) shows the direction of a test piece cut from a stainless steel bar for each measurement. 2 is the test piece used. 'Test piece A is an orphan measurement for each manufacturing step, and test piece B is an arc measurement for a product (see Fig. 7). It is used for measuring curl degree during manufacturing steps and products. The problem to be solved by the invention: As mentioned above, the stainless steel strip J is changed by 90 degrees in the circular direction before and after the tension leveler, and the size of the arc or curl at each part is measured. The solitary shape of the strip of the final product can be entered. Within the allowable range. However, in the production line of stainless steel automatic seeding material made from =, the material of the steel bar before the tension leveler will only be rolled when the green 7 coils are rolled. Therefore, 'the tension of the flattening machine 10 is applied to the non-recording steel bar: when the tension is changed by 90 degrees in the direction of perfection, the size (arc) is also extremely large, and' the size of the error solitary shape will be adjusted for a little Allow this paper size ~ — (Read the first note of the book, then fill in this page). 丨 '' > Install ------ Order—

.-II II-I -I 11 a 6 Many, description of the invention (A7 B7 Disadvantages printed below the scope of printing by the Consumers' Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. Furthermore, the stainless steel bar is shown in Figure 7 as a corrective stepper ~ When rolling out, etc. ^ can be adjusted straight and straight by the board, _ The front end of the non-recorded steel bar J displayed by a solid line and the rear end displayed by a one-point chain line are very different from each other. Therefore, the machine is leveled by tension. 10. When the stainless steel bar j is formed in an arc shape, the size of the shape is greatly different .. The object of the present invention is to provide a problem that can solve the aforementioned conventional art, and to provide a non-recorded steel bar within a certain and inexpensive tolerance range. Solitary non-scale ^ strip arc-shaped forming method and calendering device for arc-shaped forming. Method used for solving the problem: The present invention which solves the aforementioned problem is to provide a surface smoothness of a pair of work rolls-square rolls as Centerline average smoothness: 〇8 ~ 20 microns, surface smoothness of other rolls as centerline average smoothness: 0.20 microns or less Rolling mill rolled stainless steel bars, and rolled stainless steel bars simultaneously rolled The arc-shaped forming method of the stainless steel bar is characterized by the desired bending. The surface finish of a pair of work rolls is different in the rolling. The speed of the front and back sides of the material is different. Therefore, the stainless steel bar is The side with the slower feed speed, that is, the smooth side of the work roll surface will bend inward in the direction of rolling. If the surface finish of the work roll on the rough side, the center line average finish Ra exceeds 2.0 microns. The surface of the stainless steel strip is not ideal due to the frictional powder generated during sliding movement with the box body. Furthermore, if the average smoothness of the centerline Ra is below 0.8 micrometers, the M-scale scale of the smooth side applies to the Chinese national standard (CNS) ) M specifications (2 丨 〇X 297 km) -7 11 ^ .-- (Please read the precautions on the back side before filling in this page) ΪΤ ----------- -m .. ..... Printed by the Consumers 'Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (4)' ~~ The difference in the surface finish of the work rolls becomes smaller Non-scale steel bars do not bend sufficiently in the direction of dust propagation 'Therefore' cannot form the desired arc Not ideal. On the other side, the smooth surface finish on the smooth side is based on the center line average finish Ra exceeding 0.20 microns, and the difference in surface finish from the working pro on the coarse sugar side becomes smaller. It cannot bend sufficiently in the rolling direction. The invention in item 2 of the patent application is an arc-shaped forming method of the stainless steel bar in the item 1 of the patent application. After the stainless steel bar is rolled, the stainless steel bar is treated with a tension leveler. The actual elongation is 0.05 to 5% in tension in the rolling direction. It is characterized by applying tension in the rolling direction to the stainless steel bar bent in the rolling direction to change the rounding direction from the rolling direction to the width direction of the non-recorded steel bar. . As a result, the bending in the width direction of the stainless steel bar, that is, the arc shape becomes larger. The invention in the third scope of the patent application is the arc-shaped forming method of the non-steel strip in the second scope of the patent application. In order to repair and adjust the solitary bending, the stainless steel strip is processed by curved rollers and module rollers. By adjusting the holding angle of curved rollers and modular rollers, you can simply correct and adjust the curved curvature. This makes it possible to obtain the necessary bending as a stainless steel automatic baffle material. The invention of item 4 in the scope of patent application is an arc-shaped forming method of a stainless steel strip in any one of the scope of application patents 丨 to 3, and the stainless steel strip is a box for manufacturing a magnetic (optical) recording medium. Features raw materials for automatic baffles. This paper size applies to China National Standard (CNS) A4 (210x297 mm)

A7 B7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. 5. Description of the invention (5) The second aspect of the present invention is that the surface finish of the milk relatives of one pair is lighter than the center line average finish Ra: 0.8 ~ 2.0 microns, the surface smoothness of other rolls is the centerline average smoothness: Rolling mills below 0.20 microns provide rolling equipment for arc-shaped forming that is characterized by rolling stainless steel strips while imparting the desired bending to the rolling direction. Embodiments of the invention: The arc-forming method and the apparatus for the arc-forming of the stainless steel bar of the present invention will be described in detail using the ideal embodiments shown in the drawings. Fig. 1 is an explanatory view showing an embodiment of a rolling arrangement for arc-shaped forming according to the present invention. The rolling apparatus 20 for arc-shaped forming shown in the figure is only a rolling mill, for example, one of the 20-stage rolling mills in FIG. 7 is a work roll. In the form of a solitary shape, the rolling device 20 is composed of a pair of work rolls having different surface finishes. The upper work roll 20a is rough and the lower work roll 20b is smoothly set to be ideal. Because the weight can be used for bending the stainless steel bar. The surface finish of the upper working pro 20a is the average smoothness of the center line Ra: 0.8 to 2.0 microns. The surface finish of the lower working roll 20b is the average smoothness of the centerline Ra: 0.20 microns or less. In this way, the work rolls on the upper and lower sides make the surface finishes different, and the speed and degree of the surface on the upper side of the rolled stainless steel bar J will be different from the speed on the lower side. Therefore, as shown in the most detailed diagram in Fig. 2, the slow side will become the inner side, and the non-recording steel bar J will bend, that is, it will curl. The surface finish of the rough side work roll 20a is such that the center line average finish Ra becomes 2.0 m or less. Exceed the data in the rolled stainless steel strip paper standard Guzhongguanjia standard (CNS) Α4 · (21Gx297 mm) 9 {read the back of the board; 5 will be filled in the matter of interest " this page} 装 — ^ 1T- ------------------ V. Description of the invention (6 A7 B7 Printed surface bumps & printed on the surface of the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs during sliding movement with the box body 3 It will cause unfavorable wear, and the average smoothness of the ten-heart line will be more than micron. If it is below the data, the difference between the surface finish of the smooth side and the light application will be small, and the steel bar j cannot be recorded. The rolling direction is sufficiently curved. Therefore, the arc shape of the desired size cannot be formed, and it is not ideal. On the other hand, the surface finish of the working bird on the smooth side is set by the centerline average finish Ra to 0.2 mm or less. Data, the difference from the surface finish of the X-roller 2Ga on the coarse sugar side becomes smaller, and the scale steel bar J cannot be sufficiently bent in the rolling direction. The number of stages of the steel bar is not particularly limited, and it is an ideal implementation state as shown in the figure. The sample is a grade 20 rolling mill. After the rolling step, as shown in Figure 3 (a), it is bent (curled) in the rolling direction. The degree of bending is that the test piece c shown in Figure 6 (c) is cut from the stainless steel bar, and one end is Hanging under the condition of vertical wall, measure the rising length of vertical wall from the two corners of the lower end (the largest value of either a4b). For rolled stainless steel strips, apply the actual tension leveler 10 With an elongation of 0.05 to 5% tension, the stainless steel bar J is bent in the direction of the stainless steel bar j as shown in FIG. 3 (b). (Arc-shaped forming). The degree of processing of the arc is, At each manufacturing step, cut the test piece a as shown in Figure 6 (c) from the front or rear end of the stainless steel bar, and when it is in the product, cut from the stainless steel bar as shown in Figure 6 (c ) Is displayed on the test piece B, and these test pieces are measured on a fixed plate. After applying tension in the rolling direction to the stainless steel strip J by the tension leveler 10, the stainless steel strip J is passed through the curved surface roller 12a and the mold roller 12b. Amend this paper size to apply Chinese National Standard (CNS) A4 specification (210X297) ) 10 (Please read the precautions on the back before filling in this page)-Binding and ordering A7 B7 5. Description of the invention (, Adjust the curl of the curl to adjust the holding angle of each roll, you can easily modify and adjust the curl of winter As a result, the solitary shape is promoted. The angle between the curved roll (diameter 150mm) 12a and the modular roll (diameter 65mm) 12b of the curl correction device 12 shown in FIG. 4 is, for example, the curved roll 12a is on the rolling line. At the position 10mm above p, there are 4 31 degrees and 12 97 degrees. At this time, the rolling angle of the rolling line rolls (diameter 150mm) 12c is 14.04 degrees. The holding angle of each roll is The position of the curved surface roll 12a of the rolling line P can be easily adjusted by changing the direction of the arrow χ, and thus, it can also be easily corrected to adjust the curling of the curl, and as a result, an arc shape is promoted. The arc-shaped forming method of the stainless steel strip of the present invention is that the stainless steel strip 8 is rolled with a different surface finish—rolling the work rolls. Therefore, except that the stainless steel strip J will bend (curl) in the rolling direction, it is the same as the conventional stainless steel strip. The arc-shaped forming method is the same. However, only the surface finishes of a pair of work rolls 20a and 20b are different, and the rolled stainless steel strip j is given a bending (curling) in the rolling direction. As a result, the rolling direction is applied by a tension leveler 10 The tension, in the stainless steel strip J, can achieve a positive and significant bending (arc) effect in the width direction. Moreover, the width of the front end of the stainless steel bar j is printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs ---------'- 1 Pack-(Please read the precautions on the back before filling in this Page) There is no big difference between the curved (arc) and the curved (arc) in the width direction of the rear end, and the left side can also be used as a curved (solitary) effect within the allowable range. Comparative Examples 1 and 2: The raw materials used for the test were rolled stainless steel strips with a thickness of 21 nm and a width of 625 lnm. The rolls were rolled in rolls, and the surface finish of one pair of work rolls in a rolling mill was the same. Smoothness Ra: 136 microns, the set elongation in the tension leveler is 0.45%.

11 A7 ----* -------- V. Description of the invention (8) Example: The raw materials used in the test are rolls of non-recorded steel strips with a thickness of 0.21 mm and a width of 525 mm into a reel-like shape. . In the rolling mill, the surface finish of the upper work roll 20a is set to the average smoothness of the centerline Ra: 1.36 microns, and the surface finish of the work roll 20b below is set to the average smoothness of the centerline.

Ra: 0.04 microns. Furthermore, the set elongation in the tension leveler was 0.4%. Table 1 shows the manufacturing steps of the examples and comparative examples 1 to 4 of the present invention, and the results of measuring the curl and arc of the product. (Please read the notes on the back before filling out this page.) Packing. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. 12 This paper size is applicable to China National Standard (CNS) A4 specifications (210X297 mm) A7 B7 V. Description of the invention (9) Printed by the Consumer Cooperatives of the Central Bureau of Standards, Ministry of Economic Affairs 〇κ > Fr 1 Νm IS% 1 Η »1 1 〇 鞅 P 1 1 U1 1 socks SP 1 | 曲曲 D? Ρ 1 | 1 socks CR P Capsule Sr Di Ρ 1 1 1 Sr 1 1 1 〇P | 1 & 〇5 P | Capsule αϊ 1 D: 1 Capsule D? P 1 〇〇S δ b \ S io 00 1 00 N > σ > 00 Ό0 oc vb κ 14 桊-〇 b: C > — »〇6 S) Ϊ3 K OJ to < -h 5 (Λ S Ν- g 6〇 !! k k δ -JN— S 10 (7 00 * όο 1 Μ όο δ ΙΟ 1 S Μ id d) σ > U) 00 νΛ SU) § 铕 警 铕 K ϊ〇ο ο v〇〇〇〇〇 〇to bi N) f fr 寐 ρ 〇§ u > · 〇1 ρ ρρ § PS ρ SS, ρ ρ〇ρ § N) C box fee! Ν) η— c > Dance: Correction 钿! to * a Ui C ϊ Μ Book I ΰ u > ε υ) ^ Ϊ 4, book S 1 1 jo supplement K Ui C 45 5 mom t is 钿 1 jo # a Ln 森 >-(¾ Saddle 810 = .¾ +) _1¾¾¾_JL / a _τ / 牟 _jl · _τ / Cen (谙 Please read the notes on the back before filling this page) • Installation-.βτ This paper size applies to Chinese national standard (CNS> A4 specification (2 丨 0X297 mm)

Fifth, the description of the invention (10) As shown in Table 1, in Comparative Examples i and 2, only the arc-shaped Xia 'that is close to the magnetic (light) recording medium is required, that is, 0.1 mm ~ 〇. The 4mm 'ideal is an arc-shaped quantity at the lower limit of the allowable range of 0.16mm to 0.30mm, and a number of 0.16mm or more in the range considered ideal is not obtained here. Therefore, as in Comparative Examples 3 and 4, the tensile elongation was increased by 0.45% and the elongation was 0.45%. Although satisfactory results were obtained at the rear end of rolling, the front end was a result of 0.1 mm or less. On the other hand, in the embodiment of the present invention, the ideal range of 0.16 mm to 0.30 mm is achieved at the front end and the rear end of the calendering, which conforms to the suitability as an automatic baffle material. Table 2 is a table showing the results of measuring the arc and curl of the product on 8 reels under the same operating conditions as in the previous examples. Table 2: Sheet thickness (0.005) of coil material Arc (0Λ-0.4) curl (80.0) Internal and external deviations Inside and outside inside and outside 1 0.182 0.184 0.002 61.95 61.94 0.25 0.35 12.0 8.0 2 0.182 0.185 0.003 61.95 61.95 0.14 0.15 23.0 8.0 3 0.182 0.184 0.002 61.94 61.93 0.20 0.20 0.20 15.0 6.0 4 0.183 0.184 0.001 61.94 61.95 0.20 0.20 22.0 12.0 12.0 12.0 0.184 .0.002 61.93 61.94 0.20 0.20 18.0 6.0 6 < 0.182 0.184 0.002 61.94 61.95 0.20 0.15 21.0 10.0 7 0.182 0.184 0.002 61.94 61.95 0.13 0.12 4.0 7.0 8 0.182 0.184 0.002 61.94 61.95 0.20 0.20 0.20 18.0 19.0 As shown in Table 2, some arcs Although the results of the shape measurement are not in the ideal range of 0.16 mm to 0.30 mm, they are in the minimum allowable range of 0.1 mm to 0.4 mm without practical problems. Table 3 is the result of Table 2 divided into calendered front end and back end to make a stick chart. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 × 297 mm) --------- installed-( Please read the notes on f before filling out this page);

, 1T Printed by the Consumers 'Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 14 A7 B7 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (11, Table 4 is based on the same operating conditions as Comparative Examples 1 and 2. 8 Scroll, the result of measuring the arc shape of the product. (Please read the notes on the back before filling out this page. 15 This paper size applies to Chinese National Standards (CNS) A4 specifications (210X297 mm) A7 B7 Central Bureau of Standards, Ministry of Economic Affairs Printed by Employee Consumer Cooperatives 5. Description of Invention (12) Table 3:

Boundary value (Please read the notes on the back before filling in this page)-.

、 1T This paper size applies Chinese National Standard (CNS) A4 specification (210X 297 mm) 16 A7 B7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of invention (π) Table 4:

Boundary value (please read the notes on the back ¾. And then fill out this page) '-bound. The size of the bound paper is applicable to China National Standard (CNS) A4 (210 X 297 mm) 17 A7 ------- --B7_ V. Description of the invention (14) Effect of the invention: The arc-shaped forming method of the stainless steel bar of the present invention is to set the surface smoothness of a pair of rollers that are lighter than one to the centerline average smoothness Ra _〇_8 ~ 2.0 microns, the surface smoothness of the other rolls is set to the centerline average smoothness Ra: 0.20 microns or less. The rolling mill rolls stainless steel strips. Therefore, the difference in the surface finish of the work rolls is performed on the surface side of the material being sent. Different from the back side speed, the stainless steel bar is the side with a slower feed speed, that is, the smooth side of the surface bends inwardly toward the rolling direction. 0 The actual elongation rate is applied to the stainless steel bar with a tension leveler. 005 ~ 0.5 % Tension treatment 'rounding direction will change from the rolling direction (curling) 90 degrees to the width direction (arc) of the stainless steel strip. Therefore, there is a bending that makes the width direction of the stainless steel strip, that is, the arc shape becomes Great effect. Brief description of the drawing: Fig. 1: A schematic view showing the main parts of the rolling device for arc forming of the present invention. Fig. 2: It shows that the stainless steel strip of the rolling mill shown in Fig. 丨 is bent in the rolling direction. A perspective view of the situation. Printed by the Consumer Cooperatives of the Central Bureau of Standards, Ministry of Economic Affairs. Figure 3: It is a perspective view illustrating the relationship between the curl and arc of the stainless steel bar in the rolling direction. Figure 4. The scales using the present invention Front view of a curl correction device for the arc-shaped forming method of a steel bar. Figure 5: A perspective view showing a conventional box for storing a magnetic (light) recording medium. 18 This paper size applies to China National Standard (CNS) A4 (210X297 mm) V. Description of the invention (15) Figure 6: It is a method for measuring the raw material of the test material which shows the degree of _ which the steel bar has, and (b) is the measurement of curl. The person 'shows the test piece that was never taken before the measurement', and is the top: it shows the outline of the manufacturing process of the arc-shaped slab of the conventional non-recorded steel bar. The symbols of the handling method Explanation: 1 ... Media box 3 ... Box body 4 ... Automatic baffle material 5 ... Rolling mill 7 ... Straight roller 10 ... Tensional leveler 12 ... Curling correction device 12a ... Light surface 12b ... Module pro 12c ... Rolling line Pro 20… Rolling device 20a, 2Ob for arc forming… Working 槪 A, B, C… Test piece B… Stainless steel strip J ... Uncast steel bar (please read the precautions on the back side first and then write the% 1 · ν • Packing.-, Ι · 5τ Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. The paper size applies to the Chinese National Standard (CNS) A4 (210X297 mm).

Claims (1)

Printed by the Central Provincial Bureau of Cooperatives, π, patent application scope L—an arc-shaped forming method for stainless steel strips, characterized by: taking the surface smoothness of one of the work rolls as the center line average smoothness Ra: 0.8 ~ 2.0 Micron, the surface smoothness of the other rolls is the average smoothness of the center line Ra: 0-20 microns. The stainless steel bar is rolled by the rolling mill, so that the stainless steel bar is rolled in the rolling direction at the same time. For example, the arc-shaped forming method of the non-recorded steel bar in the scope of the patent application is characterized in that: After the stainless steel bar is rolled, the stainless steel bar is subjected to an actual elongation in the rolling direction by a tension flattening machine. 5% tension treatment. 3. The arc-shaped forming method of the stainless steel bar according to item 2 of the scope of the patent application, characterized in that the stainless steel bar is processed by a curved surface roller and a module roller in order to correct and adjust the solitary bending. 4. The solitary forming method of the stainless steel bar according to any one of the scope of the patent application, characterized in that the aforementioned stainless steel bar is used for manufacturing an automatic baffle for a box for storing magnetic (optical) recording media. raw material. —A kind of calendering device for arc-shaped forming of stainless steel strips, which is—to the work roll—the surface smoothness of the square is the average smoothness of the center line ^: ~ 2.0 micron, the surface smoothness of the other rolls is the average smoothness of the center line Ra : Rolling mill below G.2G micrometer, characterized in that the rolled stainless steel strip simultaneously gives the desired bending in the rolling direction. 5. Standard (CNS page