JP4630571B2 - ROLLING APPARATUS AND METHOD FOR MANUFACTURING MODIFICATIONS PRODUCT - Google Patents

Description

  The present invention relates to a rolling apparatus and a method for producing a modified cross-section product using the rolling apparatus.

  In this specification and claims, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  Recently, as a capacitor for a car air conditioner, for example, as shown in FIG. 16, a pair of headers (80) (81) arranged parallel to each other at an interval, and both headers (80) (81) at both ends, respectively. Arranged in the ventilation gap between the parallel aluminum flat refrigerant flow pipe (82) connected to the refrigerant refrigerant pipe (82) and brazed to both refrigerant flow pipes (82) An aluminum corrugated fin (83), an inlet pipe (84) connected to the upper end of the peripheral wall of the first header (80), and an outlet pipe (85) connected to the lower end of the peripheral wall of the second header (81) The first partition plate (86) provided in the upper position from the middle of the first header (80) and the second partition plate provided in the lower position from the middle of the second header (81). (87), the number of refrigerant flow pipes (82) between the inlet pipe (84) and the first partition plate (86), the first partition plate (86) and the second partition plate (87) Between the refrigerant distribution pipes (82) The number of refrigerant circulation pipes (82) between the second partition plate (87) and the outlet pipe (85) is sequentially reduced from above to form a passage group, and flows from the inlet pipe (84). A so-called multi-flow type condenser in which the gas-phase refrigerant flows in a meandering manner in the unit of each passage group until the liquid phase refrigerant flows out from the outlet pipe (85), Instead of the conventional serpentine type capacitor, it is widely used as one that can realize high performance, low pressure loss and ultra compact size.

  The refrigerant circulation pipe (82) of the capacitor is required not only to have excellent heat exchange efficiency but also to have pressure resistance because a high-pressure gas refrigerant is introduced therein. Moreover, in order to make the condenser compact, it is required that the pipe wall of the refrigerant flow pipe is thin and the pipe height is low.

  As a flat tube excellent in heat exchange efficiency used for such a refrigerant flow pipe (82), it is long and spans the upper and lower walls, the left and right side walls straddling the left and right edges of the upper and lower walls, and the left and right side walls. A plurality of reinforcing walls extending in the vertical direction and spaced apart from each other by a predetermined distance, and having parallel fluid passages therein, and each reinforcing wall has a protruding shape below the upper wall. It is known that the downward reinforcing wall protrusions integrally formed with the upper reinforcing wall protrusions integrally formed in a raised shape above the lower wall are joined together and brazed. (See Patent Document 1 and FIG. 4).

  Such a flat tube has two flat wall forming portions connected via a connecting portion, side wall ridges integrally formed in a raised shape on the side edge opposite to the connecting portion in each flat wall forming portion, Further, one metal deformed cross-section product having a reinforcing wall projection integrally molded in an inwardly protruding shape from each flat wall forming portion is bent into a hairpin shape at the connecting portion, and the side ribs and the reinforcing wall are It is manufactured by bracing the protruding ridges for side walls and the protruding ridges for reinforcing walls.

  Further, as described in Patent Document 1, as a flat tube excellent in heat exchange efficiency used for such a refrigerant flow pipe (82), both the left and right sides straddling the upper and lower walls and the left and right edges of the upper and lower walls are described. A wall and a plurality of reinforcing walls extending between the right and left side walls and extending in the lengthwise direction and spaced apart from each other by a predetermined distance, and having parallel fluid passages therein. Each reinforcing wall is formed by brazing reinforcing wall projections integrally formed in an inwardly raised shape on at least one of the upper and lower walls to the inner surface of the other flat wall. Is also known.

  Such a flat tube has two flat wall forming portions connected via a connecting portion, side wall ridges integrally formed in a raised shape on the side edge opposite to the connecting portion in each flat wall forming portion, And, at least one of the two flat wall forming portions is formed of one metal deformed cross-sectional product having reinforcing wall protrusions integrally formed in a protruding shape in the same direction as the side wall protrusions, and is bent into a hairpin shape at the connecting portion. The side wall ridges are brought into contact with each other, and the front ends of the reinforcing wall ridges are brought into contact with the flat wall forming portion on the opposite side of the ridges, and the side wall ridges are brazed. And it manufactures by brazing the front-end | tip part of the protruding item | line for reinforcement walls to a flat wall formation part.

  As described in Patent Document 1, for example, an aluminum brazing sheet provided with a brazing filler metal layer on both sides is formed, and side wall ridges and reinforcing wall ridges are formed. It is manufactured by passing it through a rolling device provided with a first work roll in which a ridge-forming annular groove for forming is formed over the entire circumference and a second work roll having a smooth cylindrical surface.

  By the way, when a rolled sheet is manufactured by a rolling device having two work rolls, both work rolls are generally formed of high-speed tool steel, and the diameters of the peripheral surfaces of both work rolls are made equal. Therefore, the above-described modified cross-section product is a first work roll in which a ridge-forming annular groove for forming the ridges for side walls and the ridges for reinforcing walls is formed over the entire circumference, and a cylindrical surface having a smooth peripheral surface, In the case of manufacturing by passing through a rolling device provided with the second work roll made, the diameter of the portion of the peripheral surface of the first work roll where the convex-line-formed annular groove is not formed is conventionally the second work roll. It is made equal to the diameter of the peripheral surface of the roll.

  However, in this rolling apparatus, there was a problem that wear of the bottom surface portion of the ridge forming annular groove in the first work roll progressed more than expected.

  By the way, in order to suppress the wear of the work roll having a smooth cylindrical surface, it has been proposed to form fine irregularities on the peripheral surface of the roll that serve as a reservoir for rolling oil (patent) Reference 2, paragraph 0006).

However, in the work roll in which the ridge forming annular groove for rolling the irregular cross-section product as described above is formed, no means has been found to suppress wear of the bottom surface portion of the ridge forming annular groove. Currently.
Japanese Patent No. 2915660 Japanese Patent Laid-Open No. 10-166010

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem, and to provide a rolling device capable of suppressing the wear of the bottom surface portion of the ridge-forming annular groove in a work roll having a ridge-forming annular groove formed on the peripheral surface, and a modified cross section using the rolling device. It is to provide a manufacturing method of a product.

  As a result of various investigations on the cause of wear of the bottom surface portion of the ridge forming annular groove in the rolling device, the present inventors have determined that the peripheral speed of the bottom surface portion of the ridge forming annular groove is between the two work rolls of the rolling device. The material speed is considerably smaller than the material speed on the outlet side, and due to this speed difference, a relatively large frictional force acts on the bottom surface portion of the ridge-formed annular groove due to the metal material. As a result, the ridge-formed annular groove It was found that the wear of the bottom surface part of the steel advances. This invention has been completed based on such knowledge obtained by the present inventors, and comprises the following aspects.

1) A first work roll and a second work roll for rolling the metal base plate together with the first work roll are provided, and the plate-like portion and one surface of the plate-like portion are raised with respect to the plate-like portion. A rolling device for producing a metal profile section product composed of a plurality of protrusions integrally formed so as to be spaced apart from each other, and is spaced apart in the axial direction of the first work roll on the peripheral surface of the first work roll. A plurality of ridge-forming annular grooves are formed over the entire circumference, and the peripheral speed of the bottom surface portion of the deepest ridge-forming annular groove among all the ridge-forming annular grooves in the first work roll is second. A rolling device in which both work rolls are rotated so as to be equal to the peripheral speed of the peripheral surface of the work rolls.

2) One second work roll is arranged for one first work roll, and the diameter of the bottom surface portion of the deepest ridge forming annular groove among all the ridge forming annular grooves in the first work roll is The rolling apparatus according to 1) , which is equal to the diameter of the peripheral surface of the second work roll, and wherein both work rolls are rotated at the same rotational speed.

  3) A plurality of second work rolls are arranged around the first work roll at intervals in the circumferential direction, and the diameter of the peripheral surface of the second work roll is all the ridge forming annular grooves in the first work roll. The rolling apparatus according to 1) above, wherein the work roll is different in diameter from the bottom surface of the deepest ridge-formed annular groove, and both work rolls are rotated at different rotational speeds.

  4) The rolling device according to any one of the above 1) to 3), wherein the surface layer portion of the bottom surface of the deepest ridge forming annular groove is made of cemented carbide in the entire first work roll.

  5) The rolling device according to any one of 1) to 4), wherein a plurality of ridge-forming annular grooves are formed on the peripheral surface of the first work roll.

  6) The first work roll is composed of a roll body and flanges fixed to both ends of the roll body and having a diameter larger than that of the roll body. The roll body is made of cemented carbide, and a plurality of rolls are formed on the circumferential surface of the roll body. The rolling apparatus as described in 5) above, wherein the ridge forming annular groove is engraved.

  7) The rolling apparatus according to 5) above, wherein the entire first work roll is formed of a cemented carbide.

  8) The first work roll includes a plurality of types of disks that are stacked on the same straight line and have different diameters, and a pair of flanges that sandwich and fix these disks from both ends. The outer peripheral surface of each disk is a machined surface, a large-diameter disk is arranged on the part that does not form the ridge, and the radius of the ridge is higher than the large-diameter disk on the part that forms the ridge. The rolling apparatus according to any one of 1) to 4) above, wherein a small small-diameter disk is disposed, and a ridge-forming annular groove is provided in a portion where the small-diameter disk is disposed.

  9) The rolling apparatus according to 8) above, wherein the small-diameter disc is formed of a cemented carbide.

  10) The number of the ridge forming annular grooves is an even number of 2 or more, and all the ridge forming annular grooves are symmetrical in the axial direction about the central portion in the axial direction of the first work roll. ) To 9).

  11) The rolling apparatus according to 10) above, wherein all the ridge-formed annular grooves have the same depth.

  12) The rolling apparatus according to 10) or 11), wherein the widths of the pair of ridge-forming annular grooves that are symmetrical to each other are equal to each other.

  13) The number of the ridge forming annular grooves is an even number of 4 or more, and the widths of all the other ridge forming annular grooves other than the two ridge forming annular grooves located at both ends are equal. The rolling apparatus according to the above 12), wherein the width of the two ridge-formed annular grooves located at both ends is wider than the width of the other ridge-formed annular grooves.

  14) Any one of the above 10) to 13), wherein an annular groove that is wider and shallower than the other ridge-forming annular grooves is formed on the circumferential surface of the central portion in the axial direction of the first work roll. A rolling apparatus according to claim 1.

  15) The number of the ridge forming annular grooves is three or more, and the two ridge forming annular grooves located at both ends are symmetrical in the axial direction around the central portion in the axial direction of the first work roll. The rolling apparatus according to any one of the above 1) to 9), wherein another protruding line forming annular groove is formed between the two protruding line forming annular grooves.

  16) The number of the ridge forming annular grooves is 4 or more, and the ridge forming annular grooves excluding the two ridge forming annular grooves located at both ends are centered on the axial central portion of the first work roll. The rolling apparatus according to 15) above, which is asymmetric.

  17) The two ridge-forming annular grooves located at both ends have the same depth, and the other ridge-formed annular grooves have the same depth, and The rolling apparatus according to 15) or 16) above, wherein the depth of the ridge forming annular groove is shallower than the depth of the other ridge forming annular groove.

  18) The rolling device according to any one of 15) to 17) above, wherein the widths of the two ridge-forming annular grooves located at both ends are equal to each other.

  19) The widths of all the other ridge forming annular grooves other than the two ridge forming annular grooves positioned at both ends are equal, and the widths of the two ridge forming annular grooves positioned at both ends are equal. The rolling apparatus according to 18) above, which is wider than the width of the other ridge-forming annular groove.

  20) Any one of the above 15) to 19), wherein an annular groove that is wider and shallower than the other ridge-forming annular grooves is formed on the circumferential surface of the central portion in the axial direction of the first work roll. A rolling apparatus according to claim 1.

  21) An annular groove for forming a protrusion is formed on the entire bottom surface of one of the two ridge-forming annular grooves located at both ends, and the annular groove is also formed on the other bottom surface. The rolling apparatus according to any one of the above 10) to 20), wherein an annular protrusion for forming a groove into which the protrusion to be formed is fitted is formed over the entire circumference.

  22) The rolling device according to any one of 1) to 9) above, wherein all the ridge-formed annular grooves have the same depth.

  23) The rolling device according to 22) above, wherein the number of the ridge forming annular grooves is 3 or more and the widths of the two ridge forming annular grooves located at both ends are equal to each other.

  24) A method for producing a modified cross-section product, wherein the metal base plate is passed between the first and second work rolls of the rolling apparatus according to any one of 1) to 23) above.

  25) The method for producing a modified cross-section product according to 24) above, wherein the metal base plate is composed of an aluminum brazing sheet provided with a brazing filler metal layer on at least the surface on which the ridges are formed.

According to the rolling apparatus of 1) to 3) above, the peripheral speed of the bottom surface portion of the deepest convex-formed annular groove among all the convex-formed annular grooves in the first work roll is the peripheral surface of the second work roll. Since both work rolls are rotated so as to be equal to the peripheral speed, the difference between the outlet speed and the peripheral speed of the bottom surface portion is smaller than in the conventional case. Therefore, wear of the bottom surface due to friction with the metal material is suppressed.

  According to the rolling apparatuses of 4) to 9), since the surface layer portion of the bottom surface of the ridge-formed annular groove is made of cemented carbide, the wear on the bottom surface is further effectively suppressed.

  According to the rolling apparatus of the above 10) to 23), it is possible to produce irregular cross-sectional products having various cross-sectional shapes while suppressing the wear of the bottom surface portion of the deepest ridge-formed annular groove in the first work roll. it can.

  According to the method for producing a modified cross-section product of 24), the modified cross-section product having various cross-sectional shapes is manufactured while suppressing the wear of the bottom surface portion of the deepest ridge-formed annular groove in the first work roll. Can do.

  According to the method for producing a modified cross-section product of 25) above, the metal base plate is composed of an aluminum brazing sheet provided with a brazing material layer on at least the surface on which the ridges are formed. Play. That is, the brazing filler metal layer is made of an Al-Si alloy that is harder than normal aluminum, but in this case, the wear of the bottom surface portion of the ridge-formed annular groove becomes significant. However, when manufacturing a modified cross-section product using the rolling apparatus of 1) to 23) above, even if an aluminum brazing sheet provided with a brazing filler metal layer on the surface on which the ridges are formed is used as the metal base plate. Further, it is possible to suppress the wear of the bottom surface portion of the ridge forming annular groove.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the upper and lower sides and the left and right sides in FIGS. Moreover, the same code | symbol is attached | subjected to the same part and the same thing through all drawings, and the overlapping description is abbreviate | omitted.

Embodiment 1
This embodiment is shown in FIGS.

  1 and 2 show the rolling device of Embodiment 1, and FIG. 3 shows a flat plate manufacturing metal plate which is a modified cross-sectional product manufactured by this rolling device. FIG. 4 shows a manufacturing method of a flat tube using a metal plate for manufacturing a flat tube, and FIG. 5 shows the manufactured flat tube.

  First, with reference to FIG. 5, the flat tube manufactured using the irregular cross-section product manufactured by the rolling apparatus of Embodiment 1 is demonstrated.

  The flat tube (1) consists of flat upper and lower walls (2) and (3) (a pair of flat walls) facing each other, and both left and right side walls (4) straddling the left and right edges of the upper and lower walls (2) and (3). (5) and a plurality of reinforcing walls (6) extending between the upper and lower walls (2) and (3) and extending in the length direction between the left and right side walls (4) and (5) and provided at predetermined intervals from each other And has a parallel fluid passage (7) inside. Although not shown in the figure, all the reinforcing walls (6) are provided with a plurality of communication holes through which the adjacent fluid passages (7) pass so as to form a staggered arrangement as viewed from above. Yes.

  The left side wall (4) is integrally molded in a raised shape upward from the left side edge of the lower wall (3) and the side wall protrusion (9) integrally formed in a raised shape from the left side edge of the upper wall (2). The side wall ridges (10) are formed by being abutted against each other and brazed. The right side wall (5) is formed integrally with the upper and lower walls (2) and (3).

  The reinforcing wall (6) is a reinforcing wall ridge (11) integrally formed in a raised shape from the upper wall (2), and a reinforcing wall ridge integrally formed in a raised shape from the lower wall (3). (12) are formed by being brought into contact with each other and brazed.

  The flat tube (1) is manufactured using a metal plate (15) for manufacturing a flat tube, which is a modified cross-section product as shown in FIG. The flat plate manufacturing metal plate (15) is made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and includes a flat upper wall forming portion (17) (flat wall forming portion) and a lower wall forming portion (18) (flat wall forming). Part), an upper wall forming part (17), and a lower wall forming part (18) and a connecting part (16) that forms the right side wall (5), and an upper wall forming part (17) and a lower wall forming part. The side wall ridges (9) and (10) which are integrally formed in a raised shape from the side edge opposite to the connecting portion (16) in (18) and form the left side wall (4), and a predetermined interval in the left-right direction A plurality of reinforcing wall projections (11) and (12) integrally formed in an upwardly protruding manner from the upper wall forming portion (17) and the lower wall forming portion (18), respectively. The reinforcing wall ridges (11) of the portion (17) and the reinforcing wall ridges (12) of the lower wall forming portion (18) are located symmetrically with respect to the center line in the width direction. The heights of the ridges for both side walls (9) and (10) and all the ridges for reinforcing walls (11) and (12) are equal. In addition, the thickness of the ridges for both side walls (9) and (10) are equal to each other, and the thickness of all the ridges for reinforcing walls (11) and (12) are also equal, and the side walls The wall thickness of the projecting ridges (9) and (10) is greater than the thickness of the reinforcing wall ridges (11) and (12). Bending and positioning ridges (21) are integrally formed over the entire length of the connecting portion (16) except for the left and right side edges. The height of the bending positioning ridges (21) is lower than the height of the side wall ridges (9) (10) and the reinforcing wall ridges (11) (12), and the width is also the side wall ridges (9). It is wider than the width of (10) and the reinforcing wall projections (11) and (12). The lower surface of the side edge on the opposite side of the connecting portion (16) in the upper wall forming portion (17) and the lower wall forming portion (18) is an inclined surface (23) inclined upward in the left-right direction. It has become. The portions other than the inclined surface (23) on the lower surfaces of the upper wall forming portion (17), the lower wall forming portion (18), and the connecting portion (16) are flat surfaces located in the same horizontal plane.

  The side wall protrusions (9), (10) and the reinforcing wall protrusions (11), (12) are integrally formed on one side of the aluminum brazing sheet clad with brazing material on both sides. A brazing filler metal layer (not shown) is formed on both side surfaces and tip surfaces of the strips (9) and (10) and the reinforcing wall projections (11) and (12), and on both upper and lower surfaces of the upper and lower wall forming portions (17) and (18). However, the brazing filler metal layers on the front end surfaces of the side wall ridges (9) and (10) and the reinforcing wall ridges (11) and (12) are thicker than the other portions of the brazing filler metal layer. Further, a protrusion (19) extending in the longitudinal direction is integrally formed over the entire length on the tip surface of the side wall protrusion (10) in the lower wall forming portion (18). On the other hand, a concave groove (20) extending in the longitudinal direction and into which the protrusion (19) is press-fitted is formed over the entire length on the front end surface of the side wall ridge (9) in the upper wall forming portion (17). A brazing filler metal layer is also present on the tip surface and both side surfaces of the protrusion (19) and on the bottom surface and both side surfaces of the groove (20).

  Then, the flat plate manufacturing metal plate (15) is sequentially bent at the left and right side edges of the connecting portion (16) by roll forming (see FIG. 4 (a)) and finally bent into a hairpin shape for the side wall. The ridges (9) and (10) and the reinforcing wall ridges (11) and (12) are abutted with each other, and the protrusion (19) is press-fitted into the groove (20) to form a bent body (22). (See Fig. 4 (b)), by brazing the end portions of the ridges for side walls (9) and (10) and the end portions of the ridges for reinforcing walls (11) and (12) (1) ) Is manufactured. At this time, the left side wall (4) by the side wall ridges (9), (10) brazed to each other, the right side wall (5) by the connecting portion (16), and the upper wall by the upper wall forming portion (17) ( 2), the lower wall (3) is formed by the lower wall forming portion (18), and the reinforcing wall (6) is formed by the reinforcing wall projections (11) and (12) brazed to each other.

  When the flat tube (1) is used as, for example, the refrigerant flow tube (82) of the capacitor shown in FIG. 16, the flat tube (1) may be manufactured simultaneously with the manufacture of the capacitor. That is, the capacitor is manufactured as follows. First, a plurality of bent bodies (22) are prepared, a pair of aluminum headers (80) (81) having the same number of bent body insertion holes as the bent bodies (22), and a plurality of aluminum corrugated fins (83 ) And prepare. Next, a pair of headers (80) and (81) are arranged at intervals, and a plurality of folded bodies (22) and fins (83) are alternately arranged, and both ends of the folded body (22) are attached to the header. (80) Insert into the bent body insertion hole of (81). Thereafter, these are heated to a predetermined temperature, and the side wall ridges (9), (10) and the reinforcement wall ridges (11), (12) of the folded body (22) are joined together, and the folded body (22) and the header (80 ) (81), and the bent body (22) and the corrugated fin (83) are simultaneously brazed using the brazing material layer of the metal plate (15) for manufacturing the flat tube. In this way, a capacitor is manufactured. The condenser (1) constitutes a refrigeration cycle together with a compressor and an evaporator, and is mounted on a car as a car air conditioner, for example.

  Next, with reference to FIG. 1 and FIG. 2, the rolling apparatus which manufactures the metal plate (15) for flat tube manufacture is demonstrated. The rolling device includes one first work roll (25) and one second work roll (26) for rolling the metal base plate (P) together with the first work roll (25).

  The first work roll (25) includes a roll body (27) and a flange (28) fixed to both ends of the roll body (27) and having a larger diameter than the roll body (27). The roll body (27) is made of cemented carbide such as JIS V10, JIS V20, JIS V30, JIS V40, JIS V50, JIS V60, for example.

  Side wall ridge forming annular grooves (29) (hereinafter referred to as first annular grooves) for forming side wall ridges (9) and (10) are engraved at both axial ends of the peripheral surface of the roll body (27). The reinforcing wall projections (11), (12) are provided in the circumferential surface of the roll body (27) between the first annular grooves (29), spaced apart in the axial direction of the roll body (27). An even number of reinforcing wall ridge forming annular grooves (31) (hereinafter referred to as second annular grooves) are formed. All the annular grooves (29) and (31) are symmetrical (laterally symmetric) in the axial direction around the central portion of the roll body (27), that is, the first work roll (25) in the axial direction. Further, the depths of all the annular grooves (29) and (31) are equal to each other. The widths of the two first annular grooves (29) are equal to each other, and the widths of all the second annular grooves (31) are also equal to each other. It is wider than the width of the annular groove (31). An annular groove (29a) for forming the protrusion (19) is formed on the entire bottom surface of the bottom surface of one first annular groove (29). Similarly, on the bottom surface of the other first annular groove (29), An annular protrusion (29b) for forming a groove (20) into which the protrusion (19) formed by the annular groove (29a) is fitted is integrally formed over the entire circumference. Further, the roll body (27), that is, the circumferential surface of the central portion in the axial direction of the first work roll (25) is wider and shallower than all the annular grooves (29) and (31), and has a convex for convex positioning. A ridge forming annular groove (32) for bending positioning (hereinafter referred to as a third annular groove) for forming the strip (21) is formed over the entire circumference.

  The entire second work roll (26) is integrally formed of die steel, high-speed tool steel, cemented carbide or the like, and has small diameter portions (33) at both ends thereof. As the cemented carbide, for example, the above-mentioned one forming the roll body (27) of the first work roll (25) is used. The large-diameter portion (34) of the second work roll (26) except the small-diameter portion (33) is fitted between both flanges (28) of the first work roll (25), and its peripheral surface is the machining surface. (34a). Inclined surface forming portions (34b) are formed at both ends of the processed surface (34a) of the second work roll (26) so as to gradually increase in diameter toward the outside in the axial direction. A portion of the machining surface (34a) of the second work roll (26) excluding the inclined surface forming portion (34b) is a cylindrical surface (30).

The radius R2 of the cylindrical surface (30) of the machining surface (34a) of the second work roll (26) is the bottom surface of the first annular groove (29) and the second annular groove (31) of the first work roll (25). The work rolls (25) and (26) are rotated at the same rotational speed. Therefore, the peripheral speed of the bottom surface of the first annular groove (29) and the second annular groove (31) of the first work roll (25) is the cylindrical surface (34a) of the machining surface (34a) of the second work roll (26). It becomes equal to the peripheral speed of 30) .

  The flat plate manufacturing metal plate (15) is composed of a metal base plate (P) made of an aluminum brazing sheet provided with a brazing filler metal layer on both sides, between the first and second work rolls (25) and (26) of a rolling mill. The first annular groove (29), the annular groove (29a), the annular protrusion (29b) and the second annular groove (31) formed in the first work roll (25) are passed through the metal base plate (P). ), The inclined surface forming portion (34b) formed in the third annular groove (32) and the second work roll (26) is transferred to manufacture the flat plate manufacturing metal plate (15).

Here, the inlet side material speed on the side where the metal base plate (P) is introduced is V1, the outlet side material speed at which the flat plate manufacturing metal plate (15) is fed is V0, and the first work roll (25) first speed is set. The peripheral speed of the bottom surface of the first annular groove (29) and the second annular groove (31) (= the peripheral speed of the cylindrical surface (30) of the machining surface (34a) of the second work roll (26)) is VR, the first. V0>Vr>VR> V1 when the peripheral speed of the peripheral surface of the work roll (25) where the annular grooves (29) (31) are not formed is Vr. Therefore, the difference V0−VR between the outlet side material speed V0 and the peripheral speed VR of the bottom surface portion of the first annular groove (29) and the second annular groove (31) of the first work roll (25) is the outlet side material speed. The difference between V0 and the peripheral speed Vr of the peripheral surface of the first work roll (25) where the annular grooves (29) (31) are not formed becomes larger than V0−Vr. ), The friction force acting on the bottom surface of the annular groove (29) (31) is reduced by the metal material, compared with the conventional rolling device equal to the peripheral speed of the processing surface (34a) of the annular groove (29) ( 31) Wear on the bottom surface is suppressed.

  Note that the peripheral speed Vr of the peripheral surface of the first work roll (25) where the annular grooves (29) and (31) are not formed is the same as the processed surface (34a) of the second work roll (26). This is faster than the conventional rolling device equal to the peripheral speed of the cylindrical surface (30), but since it does not become faster than the outlet side material speed V0, the difference V0 between the outlet side material speed V0 and the peripheral speed Vr -Vr becomes smaller than the difference in the conventional rolling apparatus, and the wear on the peripheral surface of the first work roll (25) where the annular grooves (29) and (31) are not formed is further suppressed.

Embodiment 2
This embodiment is shown in FIG. 6, and is a rolling device for manufacturing a flat plate manufacturing metal plate (15) having the same shape as that of the first embodiment.

In FIG. 6, the roll main body (36) of the first work roll (35) of the rolling apparatus has three types of discs (37) (38) (39A) (39B) stacked on the same straight line and having different diameters. These discs (37), (38), (39A) and (39B) are sandwiched and fixed from both ends by a pair of left and right flanges (28). These discs (37), (38), (39A), and (39B) are configured such that the middle diameter disc (37) is located at the center in the axial direction of the first work roll (35), and the middle diameter disc (37 The large diameter disks (38) and the small diameter disks (39B) are alternately arranged on both sides of each other so that the small diameter disks (39A) are located at both ends. The large-diameter disk (38) is disposed on the portion of the flat tube manufacturing metal plate (15) where the ridges (9) to (12) are not formed. The medium-diameter disk (37) and the large-diameter disk (38) are each formed of die steel, high-speed tool steel, cemented carbide, etc., and their peripheral surfaces are processed surfaces. As the cemented carbide, for example, JIS V10, JIS V20, JIS V30, JIS V40, JIS V50, JIS V60 and the like are used. The small diameter discs (39A) and (39B) are made of cemented carbide such as JIS V10, JIS V20, JIS V30, JIS V40, JIS V50, JIS V60, etc., and the peripheral surface thereof is a processed surface. All the large-diameter disks (38) have the same radius, and the medium-diameter disk (37) has a smaller radius than the large-diameter disk (38). All the small-diameter disks (39A) (39B) have the same radius and the same radius R2 as the cylindrical surface (30) of the machining surface (34a) of the second work roll (26), It is smaller than the radius of the medium diameter disk (37). The thicknesses of the two small-diameter disks (39A) at both ends are equal to each other, and the thicknesses of all the other small-diameter disks (39B) are also equal, and the small-diameter disks (39A) at both ends are also equal. ) Is thicker than the other small-diameter disks (39B). Further, the thickness of all the small diameter disks (39A) (39B) is thinner than the thickness of the medium diameter disk (37). An annular concave groove (39a) for forming a protrusion (19) is formed over the entire circumference on the circumferential surface of the small-diameter disk (39A) at one end, and also on the circumferential surface of the small-diameter disk (39A) at the other end. An annular protrusion (39b) for forming a groove (20) into which the protrusion (19) formed by the annular groove (39a) is fitted is formed over the entire circumference.

  A third annular groove (32) is formed by the medium-diameter disk (37) and the two large-diameter disks (38) on both sides thereof, and the small-diameter disk (39A) on both ends and the large-diameter on both sides thereof. A first annular groove (29) is formed by the disk (38) and the flange (28), and the second small groove disk (39B) and two large diameter disks (38) on both sides of the first annular groove (29) An annular groove (31) is formed.

The first and second work rolls (35) and (26) are rotated at the same rotational speed. As a result, the radius of all the small diameter disks (39A) (39B) is equal to the radius R2 of the cylindrical surface (30) of the machining surface (34a) of the second work roll (26). The peripheral speed of the bottom surface of the first annular groove (29) and the second annular groove (31) of the work roll (35) is the circumference of the cylindrical surface (30) of the machining surface (34a) of the second work roll (26). Equal to speed .

  The production of the flat plate-producing metal plate (15) using this rolling apparatus is performed in the same manner as in the first embodiment, and similarly to the first embodiment, the first annular groove (29) and the second annular groove (29) are produced. Wear on the bottom surface of the annular groove (31) is suppressed.

Embodiment 3
This embodiment is shown in FIGS.

  FIG. 7 shows a rolling apparatus according to Embodiment 3, and FIG. 8 shows a metal plate for manufacturing a flat tube which is a modified cross-sectional product manufactured by this rolling apparatus. FIG. 9 shows a method of manufacturing a flat tube using a metal plate for manufacturing a flat tube, and FIG. 10 shows the manufactured flat tube.

  First, with reference to FIG. 10, the flat tube manufactured using the irregular cross-section product manufactured by the rolling apparatus of Embodiment 3 is demonstrated.

  The flat tube (40) is the same as the reinforcing wall (6) formed by brazing the reinforcing wall projection (41) integrally formed in a raised shape downward from the upper wall (2) to the lower wall (3). Reinforcing wall ridges (42) integrally formed in a protruding shape above the wall (3) are alternately provided in the left-right direction with reinforcing walls (6) brazed to the upper wall (2). The other configuration is the same as that of the flat tube (1) described in the first embodiment.

  The flat tube (40) is manufactured using a metal plate (45) for manufacturing a flat tube as shown in FIG. The flat plate manufacturing metal plate (45) is made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and is raised above the upper wall forming portion (17) and the lower wall forming portion (18) at a predetermined interval in the left-right direction. A plurality of reinforcing wall ridges (41) (42) integrally formed in a shape, and reinforcement of the reinforcing wall ridges (41) of the upper wall forming portion (17) and the lower wall forming portion (18). The wall ridges (42) are in a position that is asymmetric with respect to the center line in the width direction. The heights of the ridges (41) and (42) for both reinforcing walls are equal to each other and about twice the height of the ridges (9) and (10) for the side walls. The wall thicknesses of the two reinforcing wall ridges (41) and (42) are all equal and thinner than the wall thickness of the side wall ridges (9) and (10). Other configurations are the same as those of the flat plate manufacturing metal plate (15) described in the first embodiment. As in the case of the first embodiment, brazing material layers (not shown) are formed on both side surfaces and the front end surface of the reinforcing wall projections (41) and (42). The brazing filler metal layer on the front end surface of (42) is thicker than the brazing filler metal layer at other portions.

  Then, the metal plate (45) for manufacturing the flat tube is sequentially bent at the left and right side edges of the connecting portion (16) by roll forming (see FIG. 9 (a)), and finally bent into a hairpin shape for the side wall. The ridges (9) and (10) are abutted with each other, the protrusions (19) are press-fitted into the grooves (20), and the ridges (41) for the reinforcing wall of the upper wall forming part (17) are further attached to the lower wall. By forming the reinforcing wall projections (42) of the lower wall forming portion (18) in contact with the upper wall forming portion (17), the bent portion (22) is formed on the forming portion (18) (FIG. 9B). And braze the tips of the side wall ridges (9) and (10), and the reinforcing wall ridges (41) of the upper wall forming part (17) to the lower wall forming part (18) The flat tube (40) is manufactured by brazing the reinforcing wall projections (42) of the wall forming portion (18) to the upper wall forming portion (17). At this time, the left side wall (4) by the side wall ridges (9), (10) brazed to each other, the right side wall (5) by the connecting portion (16), and the upper wall by the upper wall forming portion (17) ( 2), the lower wall forming portion (18) forms the lower wall (3), and the reinforcing wall projections (41) and (42) form the reinforcing wall (6).

  When the flat tube (40) is used, for example, as the refrigerant flow tube (82) of the capacitor shown in FIG. 16, the flat tube (40) is manufactured simultaneously with the manufacture of the capacitor in the same manner as in the first embodiment. May be.

  Next, with reference to FIG. 7, a rolling device for producing a flat plate-producing metal plate (45) will be described. In the case of the rolling apparatus of Embodiment 3, the roll body (27) of the first work roll (46) is formed of cemented carbide such as JIS V10, JIS V20, JIS V30, JIS V40, JIS V50, JIS V60, for example. And a plurality of reinforcing wall ridges (41) (42) are formed in a portion between the first annular grooves (29) on the peripheral surface at intervals in the axial direction of the roll body (27). A reinforcing-wall-formed ridge-forming annular groove (47) (hereinafter referred to as a fourth annular groove) is formed. The fourth annular groove (47) is asymmetric in the axial direction about the center of the roll body (27), that is, the first work roll (46) in the axial direction. The depth of all the fourth annular grooves (47) is equal, and is about twice the depth of the first annular groove (29). Further, all the fourth annular grooves (47) have the same width and are narrower than the width of the first annular groove (29).

The radius of the bottom surface of the fourth annular groove (47) of the first work roll (46) is equal to the radius R2 of the cylindrical surface (30) of the machining surface (34a) of the second work roll (26), In addition, both work rolls (46) and (26) can be rotated at the same rotational speed. Accordingly, the peripheral speed of the bottom surface portion of the fourth annular groove (47) of the first work roll (46) is equal to the peripheral speed of the cylindrical surface (30) of the machining surface (34a) of the second work roll (26). .

  The production of the flat plate manufacturing metal plate (45) using this rolling apparatus is performed in the same manner as in the first embodiment, and similarly to the first embodiment, the bottom surface of the fourth annular groove (47). Wear is suppressed.

  Also in the third embodiment, as in the second embodiment, a plurality of discs having different diameters are stacked on the same straight line, whereby the first annular groove (29) and the fourth annular groove (47). In addition, the roll body (27) of the first work roll (46) having the ridge forming annular groove (32) for bending positioning may be configured. In this case, the disc whose peripheral surface forms the bottom surface of the fourth annular groove (47) is formed of a cemented carbide such as JIS V10, JIS V20, JIS V30, JIS V40, JIS V50, JIS V60, for example. . Further, the radius of the disk is set equal to the radius R2 of the cylindrical surface (30) of the processed surface (34a) of the second work roll (26).

Embodiment 4
This embodiment is shown in FIGS.

  FIG. 11 shows a rolling device according to Embodiment 4, and FIG. 12 shows a member for producing a flat tube which is a modified cross-sectional product produced by this rolling device. FIG. 13 shows a manufacturing method of a flat tube using the flat tube manufacturing component, and FIG. 14 shows the manufactured flat tube.

  First, with reference to FIG. 14, the flat tube manufactured using the irregular cross-section product manufactured with the rolling apparatus of Embodiment 4 is demonstrated.

  The flat tube (50) consists of flat upper and lower walls (51) and (52), and double left and right side walls (53) and (54) straddling the left and right edges of the upper and lower walls (51) and (52). A plurality of reinforcing walls (55) extending between the upper and lower walls (51) and (52) between the walls (53) and (54) and extending in the length direction and spaced from each other by a predetermined distance are provided in parallel inside An aluminum lower component member (57) that constitutes a lower wall (52), left and right side walls (53) (54) and a reinforcing wall (55), and an upper wall (56). 51) and left and right side walls (53) and (54) plate-shaped aluminum upper constituent members (58). Although not shown in the figure, all the reinforcing walls (55) are provided with a plurality of communication holes through which the adjacent fluid passages (56) pass through in a staggered arrangement as viewed from above. Yes.

  The left and right side walls (53) and (54) are formed on the left and right side edges of the upper wall (51) in a downwardly protruding manner, and the upper side walls (53) and (54) are above the left and right side edges of the lower wall (52). The upward side wall ridges (60) integrally formed in a raised shape are formed by brazing each other in a state of overlapping so that the downward side wall ridges (59) come to the outside. The upper end of the upward side wall ridge (60) is brazed to the upper wall (51). The reinforcing wall (55) is formed by brazing reinforcing wall projections (61) integrally formed in a raised shape on the lower wall (52) to the upper wall (51). The wall thickness and height of both the upward side wall ridges (60) and all the reinforcing wall ridges (61) are equal.

  The lower component member (57) is a modified cross-section product manufactured by the rolling device of the fourth embodiment.

  As shown in FIG. 12, the lower component member (57) includes a flat lower wall forming portion (62), and upward protruding ridges integrally formed on both side edges of the lower wall forming portion (62) in an upward protruding shape. (60) and a plurality of reinforcing walls extending in the longitudinal direction integrally formed at a predetermined distance from each other with a predetermined interval between the ridges (60) for both side walls of the lower wall forming portion (62) Consists of ridges (61). In addition, inclined surfaces (63) inclined upward in the left-right direction are formed on both left and right edges of the lower surface of the lower component (57).

  As shown in FIG. 13 (a), the upper component member (58) is manufactured by an appropriate method such as a roll forming method, a pressing method, or a rolling method, using an aluminum brazing sheet provided with a brazing material layer on both sides. A flat upper wall forming part (64), and both side edges of the upper wall forming part (64) are integrally formed in a downwardly raised shape, and the ridges (60) for the both side walls of the lower component member (57). ) And the downward protruding side wall ridges (59) that overlap the outside. The width of the upper wall forming portion (64) of the upper component (58) is slightly wider than the width of the lower component (57), and the upper component (58) is covered with the lower component (57). Yes.

  Then, the upper component member (58) is placed on the lower component member (57) so that the downward sidewall projection (59) overlaps the outside of the upward sidewall projection (60), and the reinforcing wall projection (61) Is brought into contact with the upper wall forming portion (64) of the upper component member (58) (see FIG. 13 (a)). Next, the lower end portion of the downward side wall ridge (59) is deformed and brought into close contact with the inclined surface (63), thereby temporarily fixing both the constituent members (57) and (58) (see FIG. 13 (b)). Next, the upper and lower wall projections (64) for the side wall ridges (59) (60), the upper side wall ridges (60) and the reinforcing wall ridges (61), and the downward side wall ridges ( The deformed part 59) and the inclined surface 63 are brazed. In this way, the flat tube (50) is manufactured. At this time, the left and right side walls (53) (54) are brazed by the side wall ridges (59) (60) brazed to each other, the upper wall forming part (64) is the upper wall (51), the lower wall forming part ( 62) forms a lower wall (53), and reinforcing wall projections (61) form a reinforcing wall (55).

  When the flat tube (50) is used, for example, as the refrigerant flow tube (82) of the capacitor shown in FIG. 16, the flat tube (50) is manufactured simultaneously with the manufacture of the capacitor in the same manner as in the first embodiment. May be.

  Next, with reference to FIG. 11, a rolling device for producing the lower component member (57) will be described. In the case of the rolling device of Embodiment 4, the roll body (27) of the first work roll (65) is formed of a cemented carbide such as JIS V10, JIS V20, JIS V30, JIS V40, JIS V50, JIS V60, for example. The side wall ridge forming annular groove (66) (hereinafter referred to as the fifth annular groove) for forming the side wall ridge (60) is formed on both ends of the peripheral surface of the roll body (27). At the same time, a plurality of reinforcing wall ridge-forming annular grooves (reinforcing wall ridge-forming annular grooves (61) are formed between the fifth annular grooves (66) at intervals in the axial direction of the roll body (27). 67) (hereinafter referred to as the sixth annular groove) is engraved. Both the fifth annular grooves (66) and all the sixth annular grooves (67) have the same depth and width.

The radius of the bottom surface of the fifth annular groove (66) and the sixth annular groove (67) of the first work roll (65) is the same as that of the cylindrical surface (30) of the machining surface (34a) of the second work roll (26). It is equal to the radius R2, and both work rolls (65) and (26) can be rotated at the same rotational speed. Therefore, the peripheral speed of the bottom surface of the fifth annular groove (66) and the sixth annular groove (67) of the first work roll (65) is the cylindrical surface (34a) of the machining surface (34a) of the second work roll (26). It becomes equal to the peripheral speed of 30) .

  The lower component member (57) is manufactured using this rolling apparatus in the same manner as the flat plate manufacturing metal plate of the first embodiment. Similarly to the case of the first embodiment, the fifth annular groove (66 ) And the bottom surface of the sixth annular groove (67) are suppressed from being worn.

  In the fourth embodiment, as in the second embodiment, the fifth annular groove (66) and the sixth annular groove (67) are formed by laminating a plurality of disks having different diameters on the same straight line. You may comprise the 1st work roll which has. In this case, the disk whose peripheral surface forms the bottom surface of the fifth annular groove (66) and the sixth annular groove (67) is, for example, JIS V10, JIS V20, JIS V30, JIS V40, JIS V50, JIS V60, etc. It is made of cemented carbide. Further, the radius of the disk is set equal to the radius R2 of the cylindrical surface (30) of the processed surface (34a) of the second work roll (26).

In the said Embodiment 1-4, a rolling apparatus is a thing of the type by which one 2nd work roll (26) was arrange | positioned with respect to one 1st work roll (25) (35) (46) (65). However, the present invention is not limited to this, and as shown in FIG. 15, the rolling apparatus according to the present invention includes a plurality of second work rolls spaced circumferentially around one first work roll (70). It is also possible to apply to a so-called satellite rolling apparatus in which (71) is arranged. In this case, the first work roll (70) has the same configuration as the first work rolls (25), (35), (46) and (65) of the first to fourth embodiments. In addition, the diameter of the second work roll (71) is smaller than the diameter of the first work roll (70), but the peripheral speed of the bottom surface of the deepest ridge forming annular groove is the second work roll (71). Both work rolls (70) and (71) are rotated at different rotational speeds so as to be equal to the peripheral speed of the processed surface excluding the inclined surface forming portion.

It is a vertical sectional view showing the rolling device of Embodiment 1 of the present invention. It is the II-II sectional view taken on the line of FIG. It is a front view of the irregular cross-section product manufactured with the rolling apparatus of FIG. It is a front view which shows the method of manufacturing a flat tube using the irregular cross-section product of FIG. It is a cross-sectional view of the flat tube manufactured by the method of FIG. It is a figure equivalent to FIG. 2 which shows the rolling apparatus of Embodiment 2 of this invention. It is a figure equivalent to FIG. 2 which shows the rolling apparatus of Embodiment 3 of this invention. It is a front view of the irregular cross-section product manufactured by the rolling apparatus of FIG. It is a front view which shows the method of manufacturing a flat tube using the irregular cross-section product of FIG. FIG. 10 is a cross-sectional view of a flat tube manufactured by the method of FIG. 9. It is a figure equivalent to FIG. 2 which shows the rolling apparatus of Embodiment 4 of this invention. It is a front view of the irregular cross-section product manufactured by the rolling apparatus of FIG. It is a front view which shows the method of manufacturing a flat tube using the irregular cross-section product of FIG. It is a cross-sectional view of the flat tube manufactured by the method of FIG. It is a vertical sectional view showing further another embodiment of the rolling device of this invention. It is a perspective view which shows the capacitor | condenser for car air conditioners.

Explanation of symbols

(25) (35) (46) (65) (70): 1st work roll
(26) (71): Second work roll
(27) (36): Roll body
(28): Flange
(29) (66): Rib forming annular groove for side wall
(31) (47) (67): Reinforcement wall projection-shaped annular groove
(32): Convex-shaped annular groove for bending positioning
(P): Metal base plate

Claims (25)

A first work roll and a second work roll for rolling the metal base plate together with the first work roll are provided. The plate-like portion and one surface of the plate-like portion are raised with respect to the plate-like portion and mutually A rolling device for manufacturing a metal modified cross-sectional product composed of a plurality of protrusions integrally formed so as to be spaced apart from each other,
On the circumferential surface of the first work roll, a plurality of ridge forming annular grooves are formed over the entire circumference at intervals in the axial direction of the first work roll, and all of the ridge forming annular grooves in the first work roll are formed. A rolling device in which both work rolls are rotated so that the peripheral speed of the bottom surface portion of the deepest convex-formed annular groove is equal to the peripheral speed of the peripheral surface of the second work roll. One second work roll is arranged with respect to one first work roll, and the diameter of the bottom surface of the deepest ridge forming annular groove among all the ridge forming annular grooves in the first work roll is 2. The rolling apparatus according to claim 1, wherein the diameter is equal to the diameter of the peripheral surface of the two work rolls , and both work rolls are rotated at the same rotational speed. A plurality of second work rolls are arranged around the first work roll at intervals in the circumferential direction, and the diameter of the peripheral surface of the second work roll is the total of the ridge forming annular grooves in the first work roll. The rolling device according to claim 1, wherein the work roll is different in diameter from the bottom surface of the deepest ridge-formed annular groove, and both work rolls are rotated at different rotational speeds. The rolling device according to any one of claims 1 to 3, wherein a surface layer portion of a bottom surface of the deepest ridge forming annular groove is made of cemented carbide in the entire first work roll. The rolling device according to any one of claims 1 to 4, wherein a plurality of ridge-forming annular grooves are formed on the peripheral surface of the first work roll. The first work roll is composed of a roll body and flanges fixed to both ends of the roll body and having a diameter larger than that of the roll body. The roll body is formed of cemented carbide, and a plurality of ridges are formed on the circumferential surface of the roll body. The rolling apparatus according to claim 5, wherein the formed annular groove is engraved. The rolling device according to claim 5, wherein the entire first work roll is formed of a cemented carbide. The first work roll includes a plurality of types of disks that are stacked on the same straight line and have different diameters, and a pair of flanges that clamp and fix these disks from both ends. The outer peripheral surface of the plate is a processed surface, a large-diameter disk is arranged in the part where the ridge is not formed, and the small diameter whose radius is smaller than the large-diameter disk by the height of the ridge in the part where the ridge is formed The rolling device according to any one of claims 1 to 4, wherein a circular plate is provided and a ridge-forming annular groove is provided in a portion where the small-diameter disc is provided. The rolling device according to claim 8, wherein the small-diameter disk is made of a cemented carbide. The number of the ridge forming annular grooves is an even number of 2 or more, and all the ridge forming annular grooves are symmetrical in the axial direction around the central portion in the axial direction of the first work roll. 9. The rolling apparatus according to claim 9. The rolling device according to claim 10, wherein the depths of all the ridge forming annular grooves are equal to each other. The rolling device according to claim 10 or 11, wherein the widths of the pair of ridge forming annular grooves that are symmetrical to each other are equal to each other. The number of the ridge forming annular grooves is an even number of 4 or more, and the widths of all the other ridge forming annular grooves other than the two ridge forming annular grooves located at both ends are equal to each other. The rolling device according to claim 12, wherein the width of the two ridge-forming annular grooves located at the width is wider than the width of the other ridge-forming annular grooves. 14. The annular groove that is wider and shallower than the other ridge-forming annular grooves is formed on the circumferential surface of the central portion in the axial direction of the first work roll, over the entire circumference. Rolling equipment. The number of the ridge forming annular grooves is 3 or more, and the two ridge forming annular grooves located at both ends are symmetrical in the axial direction around the central portion in the axial direction of the first work roll, The rolling device according to any one of claims 1 to 9, wherein another ridge forming annular groove is formed between the two ridge forming annular grooves. The number of the ridge forming annular grooves is 4 or more, and the ridge forming annular grooves excluding the two ridge forming annular grooves located at both ends are asymmetric with respect to the central portion in the axial direction of the first work roll. The rolling device according to claim 15. The two ridges formed at both ends are equal in depth to the two ridges formed annular grooves located at both ends, and the other ridges formed annular grooves are equal in depth. The rolling apparatus according to claim 15 or 16, wherein the depth of the formed annular groove is shallower than the depth of the other convex-formed annular groove. The rolling device according to any one of claims 15 to 17, wherein the widths of the two ridge-forming annular grooves located at both ends are equal to each other. The widths of all the other ridge forming annular grooves other than the two ridge forming annular grooves located at both ends are equal, and the widths of the two ridge forming annular grooves located at both ends are the same as the other widths. The rolling device according to claim 18, wherein the rolling device is wider than the width of the ridge forming annular groove. 20. The annular groove that is wider and shallower than the other ridge-forming annular grooves is formed on the circumferential surface of the central portion in the axial direction of the first work roll. Rolling equipment. An annular groove for forming a protrusion is formed on the entire bottom surface of one of the two ridge-forming annular grooves located at both ends, and the annular groove is also formed on the other bottom surface. The rolling apparatus according to any one of claims 10 to 20, wherein an annular protrusion for forming a groove into which the protrusion is fitted is formed over the entire circumference. The rolling device according to any one of claims 1 to 9, wherein all the ridge forming annular grooves have the same depth. The rolling device according to claim 22, wherein the number of the ridge forming annular grooves is three or more, and the widths of the two ridge forming annular grooves located at both ends are equal to each other. A method for producing a modified cross-section product, comprising: passing a metal base plate between the first and second work rolls of the rolling apparatus according to any one of claims 1 to 23. The method for producing a modified cross-section product according to claim 24, wherein the metal base plate is an aluminum brazing sheet provided with a brazing filler metal layer on at least the surface on which the ridges are formed.

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