JP4592277B2 - Terminal processing method and terminal processing apparatus for galvanized steel sheet - Google Patents

Description

  The present invention relates to a terminal processing method and a terminal processing apparatus for removing galvanizing from a terminal of a galvanized steel sheet.

  For example, the body of a steel drum can is obtained by flattening a steel plate unwound from a body plate coil with a leveler in a body plate processing line, shearing it to a predetermined size by a shearing machine, and forming the sheared flat plate into a cylindrical shape. After wrapping the both ends of the start and end with a predetermined width (about 2mm) and joining them with a seam welder, crushing the welded parts with a masher cutter and cutting the ears at the start and end, and then pulling out the flanges with a flanging machine And finally the ring is removed by a ring remover.

  Seam welding is a method that repeats spot welding continuously while rotating a disk-shaped electrode, and is mainly applied to those that require oil tightness, water tightness, and air tightness. Conventionally, seam welding has been applied. In the case of a galvanized can, it is necessary to remove both ends of the zinc, which is the lap portion, in advance in order to ensure seam weldability.

  Conventionally, in the manufacturing process of a galvanized can, when removing galvanization at the end of a galvanized steel sheet, the galvanized steel plate is automatically scraped and removed by a grinder, and an operator performs switch operation, appearance monitoring, and the like. For this reason, workers need to wear dust-proof clothing, dust-proof masks, dust-proof eyeglasses, etc., not only the workability is bad, but also the working conditions become significantly worse at high temperatures and high humidity, and the burden on the workers is reduced. To increase. Furthermore, in removing dust from zinc, it is necessary to provide sufficient ventilation, and it is essential to improve the work environment such as the installation of a ventilation device.

  Also, when scraping galvanization with a grinder, the plate thickness changes according to the thickness of the galvanized layer, and further, the plate thickness becomes thin due to grinding with the grinder several times, especially the corner thickness tends to be thin, There are problems such as difficulty in uniform welding. For this reason, in the manufacturing process of the galvanized drum, there is a processing method and a processing apparatus that can easily remove the galvanized terminal of the galvanized steel sheet and ensure the quality of the surface of the steel sheet after the galvanization is removed. It is requested.

  The present invention has been made in view of the above points, and can easily remove the galvanization of the terminal of the galvanized steel sheet and ensure the quality of the surface after removing the galvanized steel sheet. And it aims at providing a terminal processor.

In order to achieve the above object, a terminal treatment method for a galvanized steel sheet according to claim 1 is directed to a galvanized steel sheet whose front and back surfaces are galvanized , from a terminal that is an edge along one side of the galvanized steel sheet. A terminal treatment method for a galvanized steel sheet including a terminal treatment including removal of the galvanized steel sheet, wherein the terminal of the galvanized steel sheet is immersed in a concentrated hydrochloric acid solution to dissolve and remove the zinc plating on the front and back of the terminal, and the concentrated hydrochloric acid. Fume that evaporates from the liquid is sucked and removed in the vicinity of the liquid surface of the concentrated hydrochloric acid solution, the front and back surfaces of the terminal from which the zinc plating has been dissolved and removed are ground, and then washed sequentially with purified water and pure water. Yes.
Terminal processing method of galvanized steel according to claim 2, in the end-processing method for galvanized steel sheet according to claim 1, further applying a rust preventive oil on the front and back surfaces of the terminal that has washed the with pure water It is a feature.

The terminal treatment apparatus for galvanized steel sheet according to claim 3 performs terminal treatment including removal of the galvanization from a terminal which is an edge along one side of the galvanized steel sheet, with respect to the galvanized steel sheet whose front and back surfaces are galvanized. A terminal treatment apparatus for a galvanized steel sheet to be executed, a hydrochloric acid tank in which concentrated hydrochloric acid solution is stored and the terminal of the galvanized steel sheet is immersed to dissolve and remove the zinc plating on the front and back of the terminal, and the hydrochloric acid tank A fume suction means provided near the liquid surface of the concentrated hydrochloric acid solution for sucking and removing fumes evaporated from the concentrated hydrochloric acid solution, a grinding means for grinding the front and back surfaces of the terminal from which the zinc plating has been removed, and purified water A water purification tank for washing the front and back surfaces of the terminal that has been stored and ground by the grinding means, a pure water tank for storing pure water and washing the front and back surfaces of the terminal that has been washed with the purified water, and the zinc Me Holding means for holding the key steel, the hydrochloride tank, grinding means, water purification tank, it is characterized in that a transfer means the deionized water tank is sequentially transferred to perform terminal processing of galvanized steel sheet the holding.

The terminal treatment apparatus for galvanized steel sheet according to claim 4 is the terminal treatment apparatus for galvanized steel sheet according to claim 3, wherein rust prevention oil is stored and rust prevention oil tank is applied to the front and back surfaces of the terminal. Is further provided.
The terminal treatment apparatus for galvanized steel sheet according to claim 5 is a surface roughening means for adjusting the roughness of the front and back surfaces of the terminal of the galvanized steel sheet terminal-treated by the terminal treatment apparatus for galvanized steel sheet according to claim 3. It is characterized by having.

According to the invention of claim 1, by immersing the terminal of the galvanized steel sheet in concentrated hydrochloric acid to dissolve and remove the zinc plating, the terminal zinc plating is completely removed in a short time without any unevenness, and the terminal plate thickness Is secured at the plate thickness of the material, and chlorine ions adhering to the terminal surface are removed by washing with purified water and pure water.
In addition, when the end of the galvanized steel sheet is immersed in a hydrochloric acid tank and the zinc plating is dissolved and removed, the fumes that evaporate from the liquid surface of the concentrated hydrochloric acid are removed by suction, so that it is not immersed in the concentrated hydrochloric acid solution of the galvanized steel sheet. It is possible to prevent the zinc plating from being dissolved in the upper part.

According to the invention of claim 2, the terminal surface washed with water is further coated with a rust preventive oil on the surface of the terminal to prevent the occurrence of rust and ensure the quality of the surface of the terminal, thereby improving the weldability in seam welding or the like. It can be secured.
According to the invention of claim 3 and claim 4, it is possible to fully automate the galvanizing removal process of the terminal of the galvanized steel sheet, and the working efficiency can be greatly improved and the working environment can be improved. There is an effect.

  According to the fifth aspect of the present invention, the surface roughness of the terminal steel plate from which the zinc plating has been dissolved and removed is set to a predetermined surface roughness, thereby reducing the adhesion of the zinc metallicon without reducing seam weldability. It is possible to improve the corrosion resistance after seam welding.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view showing a first embodiment of a terminal processing apparatus to which a terminal processing method for a galvanized steel sheet according to the present invention is applied, FIG. 2 is a plan view of the terminal processing apparatus shown in FIG. FIG. 3 is a cross-sectional view taken along the arrow III-III of the terminal processing apparatus shown in FIG. The terminal treatment apparatus shown in the present embodiment is a terminal treatment apparatus that removes galvanization on both sides of both terminals to be seam welded to a galvanized steel sheet used in a galvanized can. It is a galvanized steel sheet that has been galvanized.

As shown in FIG. 1 to FIG. 3, the terminal processing apparatus 1 has four support columns 4 vertically and horizontally arranged near the center of the base 3 of the main frame 2, and extends in the left-right direction at the upper ends of these support columns 4. The rails 9 and 9 are installed over the entire length along the longitudinal direction on the front and rear side members 5 and 5.
As shown in FIG. 1, a pre-treatment stage S1 on which a galvanized steel plate as a plate material to be terminal-treated is placed on one side (left side) of the base 3, and the terminal treatment of the galvanized steel plate is performed substantially in the center. A stage S2 is disposed, and a post-treatment stage S3 is disposed on which the galvanized steel sheet subjected to the terminal treatment is placed on the other side (right side). Hereinafter, the galvanized steel sheet before terminal treatment is denoted by reference numeral 100, and the galvanized steel sheet after terminal treatment is denoted by reference numeral 100 '.

  A plurality of rollers 11 are juxtaposed horizontally on the pre-processing stage S1, and positioning stopper plates 12 are fixed to the front and rear columns 4 of the rollers 11 on the processing stage S2 side. A pre-treatment pallet P1 on which a large number of galvanized steel plates 100 (indicated by two-dot chain lines) to be treated are stacked and loaded is loaded into the roller 11 from the direction of arrow A, and the stopper plate 12 is placed on the galvanized steel plate 100 loaded. One side end face is locked and positioned. The galvanized steel sheet 100 has a rectangular shape, and is carried in a longitudinal direction in the front view shown in FIG. 1 (vertical direction in the plan view shown in FIG. 2), and both ends of the front and rear (short side) thereof. The zinc plating is removed.

  In the processing stage S2, a holding mechanism 40 for holding the galvanized steel sheet 100 in a state to be subjected to terminal processing, and processing liquid tanks 70 and 70 ′ for storing processing liquid for processing the terminal of the held galvanized steel sheet 100 (FIG. 3) The elevating mechanism 80 for elevating and lowering the treatment liquid tanks 70 and 70 'and immersing the terminal in the treatment liquid, and the drive mechanism for moving the treatment liquid tanks 70 and 70' horizontally and sequentially performing predetermined terminal processing. 90 (FIG. 6) is provided. An unloading carriage 15 is movably disposed on the front side in the figure in the post-processing stage S3, and the terminal-treated galvanized steel sheet 100 ′ unloaded from the stage S2 is stacked and transported to the next process. To do.

  As shown in FIGS. 1 and 2, a first transport mechanism 20 and a second transport mechanism 30 are placed on the rails 9, 9 on the front and rear of the main frame 2 so as to be movable in the left-right direction in the drawing. The mechanism 20 is movable between the pre-processing stage S1 and the processing stage S2, and the second transport mechanism 30 is movable between the processing stage S2 and the post-processing stage S3. The first transport mechanism 20 takes out the galvanized steel sheets 100 stacked on the pre-processing pallet P1 of the pre-processing stage S1 one by one from the top and transports them horizontally to the processing stage S2, and the second transport mechanism 30. , Galvanized steel sheet 100 ′ subjected to terminal processing in the processing stage S 2 is horizontally transported to the post-processing stage S 3 and stacked on the carriage 15.

  As shown in FIG. 1, the first transport mechanism 20 includes a carriage 21, a lower plate 22, and cylindrical guides that are vertically fixed to the four corners of the lower plate 22 and fixed to the carriage 21. Four rods 23 that pass through slidably, a top plate 24 having four corners fixed to the upper ends of these rods 23, and a carriage 21 that pass through the lower end are pivotally supported at the center of the upper surface of the lower plate 22, A top end of the top plate 24 is pivotally supported at the center of the bottom surface of the top plate 24, a carriage 21 is disposed on the carriage 21 and a lift motor 26 that rotates the feed screw 25, and a bottom surface of the bottom plate 22 is provided via an arm 27. The suction cup 28 is configured as a holding means for holding the galvanized steel sheet.

  The elevating motor 26 incorporates a speed reducer and a brake, and rotates a feed nut (not shown) screwed with the feed screw 25 to raise and lower the lower plate 22 together with the feed screw 25. The top plate 24 is provided with a hole 24a (FIG. 2) at a position corresponding to the raising / lowering motor 26, so that the motor 26 is allowed to pass through and not interfere when lowered. As shown in FIG. 2, the arm 27 is provided on the lower surface of the lower plate 22 so as to protrude horizontally corresponding to two locations near the upper four corners of the galvanized steel sheet 100 and both long side edges. A suction cup 28 is fixed to the lower surface of the suction cup 28 so that the suction surface faces the peripheral edge of the upper surface of the galvanized steel sheet 100. These suction cups 28 are connected to a vacuum device (both not shown) as a vacuum source via a flexible tube so that the galvanized steel sheet 100 can be adsorbed and removed.

As a result, the first transport mechanism 20 lowers the lower plate 22 to adsorb the suction cup 28 to the upper surface of the uppermost galvanized steel sheet 100 that is stacked and placed on the pre-processing pallet P1 of the pre-processing stage S1. 1 is raised to a predetermined height position (upper limit position) indicated by a two-dot chain line, and the galvanized steel sheets 100 are taken out one by one from the pre-treatment stage S1.
The second transport mechanism 30 is configured similarly to the first transport mechanism 20. In the second transport mechanism 30, constituent elements corresponding to the constituent elements of the first transport mechanism 20 are denoted by the corresponding reference numerals in the thirties and detailed description thereof is omitted. The second transport mechanism 30 lowers the lower plate 32 and sucks and holds the galvanized steel plate 100 ′ subjected to terminal processing in the processing stage S2 by the suction cup 38, and the lower plate 32 is moved to a predetermined height position indicated by a two-dot chain line. After being lifted and transported to the post-processing stage S3, the lower plate 32 is lowered in the post-processing stage S3, the galvanized steel plate 100 ′ is stacked on the carriage 15 and the suction of the suction cup 38 is released. It rises to a predetermined height position indicated by.

  In addition, although the raising / lowering means of the 1st conveyance mechanism 20 was comprised with the feed nut 25 screwed together with the feed screw 25, the raising / lowering motor 26, and the feed screw 25, it is not restricted to this, Even if it uses an air cylinder Good. That is, an air cylinder may be suspended from the carriage 21 so that the lower plate 22 is fixed to the tip of the rod and the lower plate 22 is moved up and down. The same applies to the second transport mechanism 30.

  As shown in FIG. 2, the driving means for driving the carriage 21 of the first transport mechanism 20 is, for example, a rodless cylinder 29 and is provided between the side member 5 on the front side of the main frame 2 and the carriage 21. The one transport mechanism 20 is moved in the left-right direction in the drawing from the upper position of the pre-processing stage S1 at the left end to the upper position of the processing stage S2. Similarly, the second transport mechanism 30 is also positioned above the post-processing stage S3 on the right end from the upper position of the processing stage S2 in the left-right direction in the figure by a rodless cylinder 39 provided between the rear side member 5 and the carriage 31. Moved to position.

  As shown in FIGS. 1 and 3, the holding mechanism 40 is disposed between the four support columns 4 and below the side members 5 and 5, and the two galvanized steel plates 100 and 101 are arranged in two upper and lower stages. Hold horizontally, rotate 90 ° downward, immerse the terminal on one side to be treated in the treatment liquid in the treatment liquid tanks 70, 70 ′, and then rotate 180 °. Then, the terminal on the other side is immersed in the processing liquid in the processing liquid tanks 70 and 70 ′ to perform the terminal processing, and then return to the horizontal state again.

  As shown in FIGS. 4 and 5, in the rotating frame 41, a rotating shaft 43 provided at the center of the left and right side walls 42 is pivotally supported by a bearing provided at the center of the upper surface of the left and right cross members 6 of the main frame 2. The galvanized steel sheet 100 conveyed horizontally can be rotated in the front-rear direction (FIG. 3). As shown in FIG. 2, the length of the side wall 42 is shorter than that of the galvanized steel plate 100, and the distance between the left and right side walls 42 is slightly wider than that of the galvanized steel plate 100. And in the state where the galvanized steel sheet 100 is stored and held, both terminals to be subjected to the terminal treatment protrude in the front-rear direction.

  As shown in FIGS. 2 and 4, the left and right rotating shafts 43 of the rotating frame 41 are fitted with discs 44 as positioning mechanisms, and locking recesses for positioning the horizontal and vertical positions on the outer peripheral surface. 44a (FIG. 4) is provided. The cross member 6 is provided with a locking cylinder 45, and a locking projection member 46 provided at the tip of the rod can be engaged with each locking recess 44a. As a result, the rotary frame 41 is positioned and locked at the horizontal position and the vertical position rotated by 90 ° and 180 °.

As shown in FIG. 5, a sprocket 47 is fixed to the tip of one rotating shaft 43, a drive motor 48 is disposed below the sprocket 47, and a sprocket 49 is fixed to the rotating shaft. . The sprockets 47 and 49 are connected by a chain indicated by a two-dot chain line, and the rotating frame 41 is rotated by the drive motor 48 as described above.
As shown in FIGS. 2 and 4, four long plate-like support plates 51 as support members are arranged at substantially equal intervals between the lower surfaces of the left and right side walls 42, and both ends are on the lower surfaces of the left and right side walls 42. The suction cups 52 and 52 are fixed to the upper surface of each support plate 51 at positions corresponding to the left and right side edges of the galvanized steel plate 100. Four plate members 53 slightly thinner than the suction surface of the suction cups 52 are placed and fixed on the central portion of each support plate 51 and on both sides of the left and right suction cups 52. These four plate members 53 are for supporting the galvanized steel plate 100 adsorbed and held by the suction cups 52 in a flat manner. Further, locking claws 54 and 54 for positioning (centering) are provided on the left and right sides of each support plate 51, and the left and right ends of the galvanized steel sheet 100 are positioned and locked. A large flat plate may be used as the support member in place of the long plate-like support plate 51, but weight reduction is achieved by using the long plate-like support plate.

  As shown in FIGS. 4 and 5, a rotary actuator 55 as a drive mechanism is housed in the upper part of the left and right side walls 42 at a position corresponding to each support plate 51 so that its rotating shaft projects vertically from the upper end surface. The base end of the arm 61 is fixed. And the suction cup 62 is being fixed to the upper surface of the front-end | tip of each arm 61 in the position corresponding to the both-sides edge part of the galvanized steel plate 100. As shown in FIG. On both sides of the suction cup 62, support plates 63 slightly thinner than the suction surface of the suction cup 62 are provided. These support plates 63 are used to flatly support the galvanized steel sheet 100 adsorbed and held by the suction cups 62. Further, positioning claws 64 are provided on the base end side of each arm 61 to position and lock both the left and right ends of the galvanized steel sheet 100. These suction cups 52 and 62 are connected to the vacuum device via a flexible tube so that the galvanized steel plates 100 and 101 can be adsorbed and removed.

  The rotating frame 41 holds the first galvanized steel plate 100 by the lower four support plates 51 and the suction cups 52, and the second galvanized steel plate by the upper left and right arms 61 and the suction cups 62. 101 is held. As shown in FIG. 3, the main frame 2 is provided with positioning (centering) cylinders 65 and 66 facing the front and rear ends of the galvanized steel plates 100 and 101 above and below the rotating frame 41, respectively. The plated steel plates 100 and 101 are positioned.

  As shown in FIGS. 1, 3 and 6, the base 3 of the processing stage S2 is provided with processing liquid for processing the terminals 100a and 101a of the galvanized steel plates 100 and 101 and 100b and 101b simultaneously below the holding mechanism 40, respectively. The processing liquid tanks 70 and 70 ′ to be stored, the elevating mechanism 80 for raising and lowering the processing liquid tanks 70 and 70 ′ and immersing the terminal in the processing liquid, and the processing liquid tanks 70 and 70 ′ are horizontally moved in order to be predetermined. A drive mechanism 90 for performing the terminal processing is provided. The lifting mechanism 80 and the driving mechanism 90 constitute transfer means for sequentially transferring the processing liquid tanks 70 and 70 ′ to perform terminal processing.

  The elevating mechanism 80 is configured such that the frame 82 slides horizontally in the front-rear direction of FIG. 1 (left-right direction in FIGS. 3 and 6) via sliders on left and right slide rails 81, 81 disposed on the base 3 in the front-rear direction. The base 83 is disposed on the frame 82. As shown in FIG. 6, the base 83 is rotatably supported at the upper part of the screw shaft 84 by a bearing suspended at the four corners of the lower surface, and a sprocket 85 is fixed in the vicinity of the bearing. The shaft portion of the screw shaft 84 is screwed into cylindrical nuts 86 suspended at corresponding four corners of the frame 82, and is supported so as to be movable up and down in a horizontal state. A lifting motor 87 is suspended from one side of the base 83, and a sprocket 88 fixed to the rotating shaft is connected to a sprocket 85 of each screw shaft 84 via a chain 89. The base 83 is moved up and down horizontally by the rotation of the lifting motor 87.

  As shown in FIGS. 3 and 6, the drive motor 91 of the drive mechanism 90 incorporates a speed reducer and a brake, and is disposed in the front-rear direction at the center of the rear part of the base 3. One end of the feed screw 92 is fixed to the rotating shaft of the driving motor 91, and the screw portion is screwed into a nut 93 fixed to the center lower position of the frame 82, and the frame according to the rotation of the driving motor 91. 82 is moved to a predetermined position in the front-rear direction, and stopped and held at the position.

  As shown in FIGS. 3 and 6, the treatment liquid tanks 70, 70 ′ can face the ends of the two galvanized steel plates 100, 101 held by the holding mechanism 40, and can be immersed at the same time in the base 83. It is arranged on the top. The processing liquid tanks 70 and 70 ′ have the same configuration, and the constituent elements of the processing liquid tank 70 ′ corresponding to the constituent elements of the processing liquid tank 70 are denoted by the corresponding reference numerals, and the processing liquid tank 70. Only will be described.

  As shown in FIG. 6, the treatment liquid tank 70 is slightly wider than the width of the galvanized steel sheet 100, and the terminal 100a of the galvanized steel sheet 100 as the treatment liquid is immersed to dissolve both sides of the galvanization. A hydrochloric acid tank 71 in which concentrated hydrochloric acid solution for removal (pickling) is stored, a surface grinding tank 72 for removing galvanized residues adhering to the terminal after the zinc plating is removed in the hydrochloric acid tank 71, purified water Is stored in the surface grinding tank 72, and the surface of the terminal after the zinc plating residue has been completely removed is washed with purified water. The purified water containing rust inhibitor is stored in the terminal surface after washing with purified water. Further, a pure water tank 74 for washing with water and a rust prevention oil tank 75 for preventing the generation of rust by applying rust prevention oil to both sides of the terminal where rust prevention oil is stored and washed with pure water are arranged in parallel in the front-rear direction as shown in the figure. ing.

  As shown in FIG. 7, the hydrochloric acid tank 71 is provided with a slit-like opening 71a along the longitudinal direction at the center of the upper surface, so that the terminal 100a of the galvanized steel sheet 100 can enter and exit with a slight gap. Yes. In the hydrochloric acid tank 71, there are intake chambers 71c and 71c as fume suction means along the longitudinal direction in the upper left and right sides of the hydrochloric acid solution storage chamber 71b and in the vicinity of the liquid level LS of the concentrated hydrochloric acid solution, which is slightly smaller than the thickness of the terminal 100a. Are arranged side by side with a wide space. In the lower part of these intake chambers 71c, a large number of small holes 71d are formed with a slight gap toward the center and obliquely downward. These intake chambers 71c have one end closed and the other end connected to a suction pump (not shown). The intake chamber 71c evaporates from the liquid level LS of concentrated hydrochloric acid and rises along both sides of the terminal 100a. Fume is sucked from each small hole 71d, chlorine gas and hydrogen gas are removed by water shower, detoxified and discharged to the atmosphere. The water in which the chlorine gas or hydrogen gas is dissolved is subjected to waste acid treatment.

  The passages 71e and 71e are arranged along the longitudinal direction on both right and left sides just above the intake chambers 71c and 71c, and each passage 71e has many small holes (injection holes) 71f in the center and obliquely downward. It has been drilled. These passages 71e are closed at one end and connected to a pump (not shown) at the other end, and spray air on both surfaces of the terminal 100a from the small holes 71f to blow off hydrochloric acid adhering to the surface. ing.

  Returning to FIG. 6, the hydrochloric acid tank 71 is provided with a lid 71 a that can be opened and closed, and is opened and closed by an air cylinder 76. The removal time of galvanization with hydrochloric acid is as short as about 20 seconds. Therefore, the lid is opened only when the end of the galvanized steel sheet 100 is immersed and removed, and the surroundings due to fumes evaporating from the hydrochloric acid solution are removed. It prevents environmental pollution and corrosion and rusting of peripheral equipment. Further, chlorine gas in the tank of the hydrochloric acid tank 71 and hydrogen gas generated when galvanizing is removed are sucked from the exhaust duct 77 by a blower (not shown), detoxified by a water shower (not shown) and discharged to the atmosphere. . The water in which the chlorine gas or hydrogen gas is dissolved is subjected to waste acid treatment.

The surface grinding tank 72 has, for example, two roller-like corrosion resistances as grinding means, for example, stainless steel wire brushes 78 and 78 are rotatably provided facing each other, and is rotated in the direction of the arrow by a motor (not shown). Then, the zinc plating residue dissolved on the both ends of the terminal 100a of the galvanized steel sheet by the concentrated hydrochloric acid solution is scraped off and removed.
As shown in FIG. 6, the treatment liquid tanks 70, 70 ′ are located below the terminals 100 a, 101 a on the lower side of the galvanized steel plates 100, 101 with the base 83 standing vertically at the lowered position shown in the figure. The terminals 100a and 101a are inserted into the opposing tanks of the processing tanks 71 to 75 and 71 'to 75' at the position where 83 is raised. Then, the frame 82 is moved horizontally by a predetermined distance by the drive mechanism 90 in a state where the base 83 is lowered, and the processing liquid tanks 70 and 70 ′ are moved up and down at the position, and the processing tanks 71 to 75 and 71 ′ to 75 ′ are moved up and down. The terminal processing is performed by inserting them sequentially.

The first transport mechanism 20, the second transport mechanism 30, the holding mechanism 40, the lifting mechanism 80 that lifts and lowers the processing liquid tanks 70, 70 ′, the horizontally moving drive mechanism 90, and the like are controlled according to a predetermined sequence by a control device (not shown). Is done.
The operation will be described below.
As shown in FIG. 1, a pre-treatment pallet P1 on which a large number of galvanized steel plates 100 to be terminal-treated is placed is loaded in the pre-treatment stage S1 of the main frame 2, and the galvanization treated in the post-treatment stage S3. A carriage 15 for carrying out the steel plate 100 'is arranged. In the holding mechanism 40, the rotary frame 41 is positioned horizontally, and as shown in FIG. 4, each upper arm 61 rotates 90 ° outward as indicated by an arrow C to move to the lower support plate 51. The first galvanized steel sheet is acceptable. The second transport mechanism 30 is located above the post-processing stage S3.

In the first transport mechanism 20, the elevating motor 26 rotates forward to lower the lower plate 22, and each sucker 28 sucks the uppermost (first) galvanized steel plate 100 stacked on the unprocessed pallet P <b> 1. After the holding, the motor 26 rotates in the reverse direction and rises to the height position indicated by the two-point difference line, and the galvanized steel sheet 100 is lifted horizontally and taken out.
Next, after the rodless cylinder 29 is actuated to drive the carriage 21 and the galvanized steel sheet 100 is transported horizontally to a position directly above the processing stage S2, the motor 26 rotates forward to lower the lower plate 22, and the zinc The plated steel plate 100 is placed on each suction cup 52 of the rotating frame 41. After the galvanized steel plate 100 is placed on the suction cup 52, the first transport mechanism 20 moves up the lower plate 22 and operates the rodless cylinder 29 to move onto the pre-treatment stage S1, in the same manner as described above. The second galvanized steel sheet 101 is taken out from the pre-processing pallet P1 and conveyed to the processing stage S2.

  After the galvanized steel sheet 100 is placed on the suction cup 52, it is positioned in the left-right direction by the left and right locking claws 54 (FIG. 4), and is positioned in the front-rear direction by the positioning cylinders 66, 66 and is adsorbed and fixed by the suction cup 52. (FIG. 3). As a result, the first galvanized steel sheet 100 is held horizontally on the rotating frame 41. Next, each arm 61 is rotated 90 ° inward in the direction of arrow C ′ shown in FIG. 4 to receive the second galvanized steel sheet 101.

  The first transport mechanism 20 horizontally transports the second galvanized steel sheet 101 to a position directly above the processing stage S <b> 2, and then places the second galvanized steel sheet 101 on the suction cup 62 of each arm 61 of the rotating frame 41. After placing the galvanized steel plate 100 on the suction cup 62, the first transport mechanism 20 moves again to the pre-treatment stage S1, takes out the next galvanized steel plate, and stands by. After the galvanized steel sheet 101 is placed on the suction cup 62, it is positioned in the left-right direction by the left and right locking claws 64 (FIG. 2), positioned in the front-rear direction by the positioning cylinders 65, 65, and suction-fixed by the suction cup 62. (FIG. 3). As a result, the second galvanized steel sheet 101 is held horizontally on the rotating frame 41.

  Next, the drive motor 48 shown in FIGS. 1 and 5 rotates the holding mechanism 40 by 90 ° counterclockwise as shown in FIG. 3, and the two galvanized steel plates 100 and 101 held by the holding mechanism 40 are moved. Standing vertically, the terminals 100a, 101a on one side are stopped just above the hydrochloric acid tanks 71, 71 ′ of the processing liquid tanks 70, 70 ′. The rotating frame 41 is latched and held at the vertical position by a disc 44 as a positioning mechanism, a cylinder 45, and a latching projection 46 (FIG. 4).

  Next, the lifting / lowering motor 87 shown in FIG. 6 is rotated to raise the base 83 to a predetermined height position, the terminals 100a and 101a are immersed in a concentrated hydrochloric acid solution to a predetermined depth, and for a predetermined time (for example, about 20 seconds). After pickling and dissolving and removing the zinc plating on both sides, the base 83 is lowered and the terminals 100a and 101a are pulled out from the hydrochloric acid tanks 71 and 71 ′. The intake chambers 71c and 71'c in the hydrochloric acid tanks 71 and 71 'suck and remove the fumes of hydrochloric acid that evaporate from the liquid level LS of the concentrated hydrochloric acid solution and rise along both sides of the terminal 100a. Further, when the steel plate 100 is pulled up, air is jetted from the passages 71e and 71′e to both sides of the terminal 100a to blow off excess hydrochloric acid adhering to the processing surface. As a result, it is possible to remove the fumes of hydrochloric acid that evaporate from the liquid level LS of the concentrated hydrochloric acid solution and rise along both sides of the terminal 100a, and the galvanized portion of the terminal 100a that is not immersed in the concentrated hydrochloric acid solution can be removed. It prevents melting and dripping of the hydrochloric acid solution when the steel plate 100 is inverted.

  Next, the moving motor 91 moves the frame 82 forward (to the left in FIG. 6) by a predetermined distance to move the surface polishing tanks 72 and 72 ′ below the terminals 100 a and 101 a, and then the substrate is moved by the lifting motor 87. The galvanized residue adhering to both surfaces of the terminals 100a and 101a is scraped off and removed by the wire brushes 78 and 78 ′ that 83 is raised and rotated. After a predetermined time, the base 83 is lowered to finish the surface polishing.

  By the same operation, the terminals 100a and 101a are immersed in the purified water of the water purification tanks 73 and 73 ′ for a predetermined time (for example, about 10 seconds) and washed with water, and the pure water tanks 74 and 74 ′ contain pure water containing a rust inhibitor for a predetermined time. After immersing (for example, several seconds) and further washing with water, the rust preventive oil is immersed in the rust preventive oil tanks 75 and 75 'and the terminal treatment is finished. After the terminal processing of the terminals 100a and 101a is completed, the frame 82 and the base 83 are retracted to the original position (initial position) and stand by. In this way, the processing of the terminals 100a and 101a on one side of the two galvanized steel plates 100 and 101 is completed.

  Next, as shown in FIG. 3, the rotary frame 41 is rotated by 180 ° and vertically positioned and locked, and the terminals 100 b and 101 b on the other side of the galvanized steel plates 100 and 101 are in the hydrochloric acid tank 71 of the treatment liquid tanks 70 and 70 ′. , 71 ′. These terminals 100b and 101b are processed in the same manner as described above. Next, after the rotary frame 41 is rotated 90 ° and positioned and locked at the original horizontal position, the suction of the galvanized steel plates 100 and 101 by the suction cups 52 and 62 is released.

  Next, the second transport mechanism 30 moves to the processing stage S2, receives the upper galvanized steel plate 101 held by the rotating frame 41 by suction with the suction cup 38, transports it horizontally to the post-processing stage S3, and lowers it. And place it on the carriage 15. In the meantime, each arm 61 holding the galvanized steel plate 101 of the rotating frame 41 is rotated 90 ° in the direction of arrow C shown in FIG. 4 and moved to the side, and the lower (first) galvanized steel plate 100 is moved. Can be taken out.

  After the galvanized steel plate 101 is placed on the carriage 15, the second transport mechanism 30 moves to the processing stage S2, receives the lower galvanized steel plate 100, transports it to the post-processing stage S3, and transports it to the galvanized steel plate 101. Place on top. Thereafter, the same process is repeated to perform terminal processing of the galvanized steel sheet placed on the pre-treatment stage S1, and place it on the carriage 15 of the post-treatment stage S3.

  When the terminal processing of all the galvanized steel sheets in the pre-processing stage S1 is completed, the empty pre-processing pallet P1 is unloaded, and a pallet on which the galvanized steel sheet to be newly terminal-processed is loaded. On the other hand, the carriage 15 on which the terminal-treated galvanized steel sheet is placed moves to the next process, and after the galvanized steel sheet is unloaded in the process, the process returns to the post-process stage S3 again. The terminal processing apparatus 1 repeats such an operation and automatically performs terminal processing of the galvanized steel sheet 100.

The terminal-treated galvanized steel sheet 100 ′ is formed into a cylindrical shape, and the terminals 100a ′ and 100b ′ are overlapped and seam-welded and joined. Each terminal 100a ', 100b' is coated with rust-preventing oil after the galvanization is removed, so that the occurrence of rust is prevented by the time of welding, and the seam weldability is ensured satisfactorily.
If normal water is used for the second washing, the chlorine ion concentration in the purified water is about 20 to 50 ppm. If pure water (purified water) is used, the chlorine ion concentration in the pure water is 1 ppm or less. Furthermore, the occurrence of rust after treatment can be prevented by applying a rust preventive oil, and the quality is ensured.

  In this way, galvanization at the end of the galvanized steel sheet is pickled, that is, dissolved and removed with concentrated hydrochloric acid, so that the galvanization can be completely removed in a short time without any unevenness. It is ensured with a plate thickness of. Thereby, it becomes possible to perform seam welding satisfactorily, and quality can be improved. Further, complete automation is possible, and the work environment is greatly improved and the work efficiency is improved.

  In addition, in the said Example 1, although the case where the zinc plating in the terminal which should carry out the seam welding of a galvanized steel plate was demonstrated as a board | plate material which should be terminal-processed, it did not restrict to this but other membrane | film | coat processes were performed. The same applies to the terminal treatment of the plate material. For example, it can be applied to various surface treatments, such as removing tin plating on the terminals of tin-plated steel sheets, removing paint on the terminals of steel plates and resin plates to which paint is applied, or coating only the terminals. Is possible.

In Example 1, the galvanized steel sheet 100 is transported to a cylinder plate processing line after the galvanization of both ends is completely removed and rolled into a cylindrical shape, and both ends are overlapped and seam welded to form the drum body. Then, the portion of the inner surface of the cylinder from which the galvanization is removed is covered with zinc metallicon and subjected to rust prevention treatment.
In the zinc metallicon treatment, it is necessary that the sprayed zinc adheres well to the terminal steel plate from which the zinc plating has been removed. When zinc plating is dissolved and removed by the acid treatment of Example 1, the surface roughness of the steel sheet is very smooth with an average roughness (Ra) of about 1 μm and a maximum roughness (Rmax) of about 10 μm, and seam welding performance is improved. On the other hand, it was found that there was some difficulty in the adhesion of zinc metallicon. Therefore, the end steel plate from which zinc plating has been dissolved and removed is subjected to a surface roughening treatment so as to improve the adhesion of zinc metallicon without reducing seam weldability. As a result of testing for various surface roughnesses, the surface roughness of the terminal steel sheet was set to an average roughness (Ra) ≧ 1.5 μm and a maximum roughness (Rmax) ≧ 15.0 μm, and the Erichsen overhang depth of the zinc sprayed portion It has been found that it is preferable that the thickness is 4.0 mm. The surface roughness is expressed in accordance with JIS B0601.

It has also been found that applying antirust oil to the terminal from which galvanization has been removed is not preferable when the metallicon treatment is applied after seam welding. Therefore, in the case where the metallicon treatment is performed after seam welding, the rust preventive oil is not applied to the terminal from which the zinc plating is removed.
FIG. 8 shows a schematic configuration of the second embodiment of the terminal processing apparatus according to the present invention, and the surface roughening means 200, 200 ′ are the surfaces of the terminals 100a, 100b of the galvanized steel sheet 100 from which galvanized steel has been removed. This is for adjusting the surface roughness. The surface roughening means 200 is, for example, for roughening the surface of the terminal 100a with a knurling so as to roughen the knurling 201, and the knurling 201 is rotatably supported and can be raised and lowered as indicated by an arrow. One side of the terminal 100a, for example, an air cylinder 202 as an actuator that presses against the lower surface, for example, an air cylinder 202, and these knurled parts 203 are spaced at half the length of the terminal 100a. For example, an air cylinder 205 is used as a support plate 204 supported and movably supported along the longitudinal direction of the terminal 100a, and as a driving means for reciprocating the support plate 204 as indicated by an arrow along the longitudinal direction of the terminal 100a. In contact with the upper surface of the terminal 100a and arranged over the entire length along the longitudinal direction of the terminal 100a. Consisting presser plate 206.

  The width of the knurl 201 is slightly wider than the width of the terminal 100a. Further, the roughness of the knurling 201 is set to a roughness according to the required surface roughness. The knurling 201 may be exchangeable according to the required surface roughness. Thereby, it is possible to easily adjust the surface roughness. Further, by arranging two knurled portions 203 side by side at an interval half the length of the terminal 100a, the stroke of the air cylinder 205 can be shortened, and the surface roughness means 200 can be reduced in size and cost. Can be achieved. The surface roughening means 200 ′ is also configured in the same manner as the surface roughening means 200.

  In the above configuration, the surface roughening means 200 is configured such that the press plate 206 is brought into contact with the upper surface of the terminal 100a of the galvanized steel sheet 100 from which the zinc plating of the terminal 100a has been removed, and the knurled portion 203 is shortened while the air cylinder 205 is shortened. The air cylinder 202 is extended to press the knurl 201 against the lower surface of the terminal 100a, and the air cylinder 205 is extended. Thereby, unevenness is given to the undersurface of terminal 100a, and predetermined surface roughness is given. Next, the air cylinder 202 is shortened and the knurl 201 is separated from the lower surface, and the air cylinder 205 is shortened to return to the initial position. Similarly, the terminal 100b is provided with irregularities on the lower surface to give a predetermined surface roughness.

  The galvanized steel sheet 100 with the surfaces of both ends 100a and 100b roughened in this way is formed into a cylindrical shape so that the surface roughened in the processing line becomes the surface (inner surface) to be treated with zinc metallicon. The terminals 100a and 100b are overlapped and seam welded to form a cylindrical body. In this cylindrical body, zinc metallicon is sprayed on the terminals 100a and 100b whose surfaces are roughened in the zinc metallicon treatment step.

The zinc metallicon treatment is performed after seam welding the both ends 100a and 100b of the galvanized steel sheet 100 to form a cylindrical body. Therefore, as shown in FIG. 9, the seam welded portion of the cylindrical body 110 is rolled. Thereafter, the inner surfaces of the end faces 100a and 100b may be roughened by the surface roughening means 200.
Accordingly, the surface roughening means 200 may be provided in the terminal treatment apparatus 1 for galvanizing shown in FIG. 1 to perform surface roughening after dissolving and removing the zinc plating of the terminal and washing with pure water, or You may install separately from the said zinc plating terminal processing apparatus 1. FIG. That is, the surface roughening treatment of the terminal may be performed in any of online, offline, batch line, and the like.

In the above-described embodiment, the case where unevenness is imparted to the terminal surface by knurling as the surface roughening means has been described. However, the present invention is not limited to this, and other examples include shot blasting, stainless wire brush, and abrasive grains. Surface roughening may be performed by a nylon brush, a grindstone roll, chemical etching, pressing, or the like.
FIG. 10 is a partially cutaway front view of a terminal processing apparatus (hereinafter simply referred to as “terminal processing apparatus”) for a galvanized steel sheet provided with the surface roughening means, and FIG. 11 is an arrow line of the terminal processing apparatus shown in FIG. It is sectional drawing which follows XI-XI. 10 and 11, the same members as those in FIGS. 1 and 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 10 and 11, the terminal processing apparatus 1 is knurled as surface roughening means in place of the positioning cylinders 65 and 66 (FIG. 3) at the height of the steel plate holding mechanism 40 of the processing stage S2. A device 120 is provided. This knurl processing device 120 has a pair of front and rear facing the terminals 100a, 100b, 101a, 100b on both front and rear sides of the two galvanized steel plates 100, 101 held horizontally in two stages on the holding mechanism 40. They are arranged one by one, and can be moved back and forth horizontally in the front-rear direction with respect to the opposing terminals. Each front knurling device is indicated by reference numeral 120, and each rear knurling device is indicated by reference numeral 120 '. The rear knurling device 120 ′ is configured symmetrically with the front knurling device 120. Therefore, the front knurling apparatus 120 will be described.

  The knurl processing device 120 is knurled on one side of the steel plates of the exposed terminals 100a, 100b, 101a, 101b after the zinc plating is dissolved and removed by the treatment liquid tanks 70, 70 ′ and washed with water. It is for roughening the surface roughness by providing irregularities. The lower side surface of the terminals 100a, 100b, 101a, 101b on which the knurl processing is performed becomes the inner surface when the galvanized steel plates 100, 101 are formed into a cylindrical shape.

  12 is a plan view of the front knurling device 120 shown in FIG. 11, FIG. 13 is an end view of the knurling device 120 shown in FIG. 12, viewed from the direction of arrow XIII, and FIG. 14 is a knurling method shown in FIG. FIG. 6 is a cross-sectional view of the device 120 along the arrow line XIV-XIV. As shown in FIGS. 12 to 14, the knurl processing device 120 includes a knurl processing device main body 121 and a support portion 122 that supports the knurl processing device main body 121, and the support plate 123 of the support portion 122 has both left and right ends. It is fixed to the columns 4 and 4 of the main frame 2.

  The knurling apparatus main body 121 is disposed between the left and right support columns 4 and 4 along the left and right (lateral) direction inside the support plate 123, and the left and right sides of the support plate 131 are supported by the support plate 123 by the guides 124 and 124. Thus, it can be moved horizontally in the front-rear direction indicated by arrows E and E ′. The support plate 131 is set longer than the width of the galvanized steel plate 100. The air cylinder 125 is fixed horizontally at the center of the support plate 123, and is fixed at the center of the support plate 131 where the tip of the rod faces. The knurling apparatus main body 121 is moved in the front-rear direction indicated by arrows E and E ′ with respect to the support plate 123 by the air cylinder 125.

  A presser plate 132 is provided horizontally on the upper side of the inner surface of the support plate 131 along the left-right (lateral) direction. As shown in FIG. 14, the presser plate 132 has a tip surface 132b of a lower surface 132a that is inclined obliquely upward so that the terminal 100a of the galvanized steel plate 100 can be easily introduced. Centering air cylinders 133 are provided vertically on both the left and right sides of the upper surface of the presser plate 132 (FIGS. 12 and 13), and a rod 133a is inserted into a hole formed in the presser plate 132 so as to be able to advance and retract. When the rod 133a is extended, the rod 133a protrudes from the lower surface 132a of the presser plate 132 to position the terminal 100a of the steel plate 100 (FIG. 14). That is, the rod 133a acts as a centering pin. The positioning air cylinder 133 corresponds to the positioning cylinders 65 and 66 shown in FIG.

  As shown in FIGS. 13 and 14, the support plate 131 is provided with two LM guides 135 in parallel along the left and right (lateral) direction below the presser plate 132, and the moving body 136 is configured by these LM guides 135. Are supported so as to be movable in the left-right direction. The movable body 136 forms a plate body, which is approximately half the length of the support plate 131, and two knurled portions 137, 137 ′ are provided on both the left and right sides of the inner surface.

  The knurled portion 137 includes a bracket 139 that supports the knurled 138 and an air cylinder 140 that presses the knurled 138 against the terminal 100a. Two knurls 138 are arranged at the upper end of the bracket 139 side by side with a slight gap in the left-right direction, and are supported rotatably. One of the two knurls 138 has a right bevel and the other has a left bevel, and these two knurls 138 attach knurled meshes (textures) to the end surface of the steel sheet. The air cylinder 140 is fixed to the moving body 136, the rod tip is fixed to the lower side of the bracket 139, and the bracket 139 can be moved up and down vertically. When the air cylinder 140 is retracted, the knurl 138 is separated from the lower surface of the presser plate 132 to allow the terminal 100a to enter and exit. When the air cylinder 140 is extended, the knurl 138 is pressed against the lower surface of the terminal 100a. The surface is roughened by cooperating with the irregularities of the mesh.

  As shown in FIG. 13, the distance D between the left and right knurled portions 137 and 137 ′ is approximately half of the width W of the terminal 100 a of the steel plate 100, and the stroke of the moving body 136 is approximately half of the width W of the steel plate 100. It is said that. The width of the knurl 138 is slightly wider (about 2 mm to 5 mm) than the width of the terminal 100a from which the zinc plating is dissolved and removed. The eyes of the knurls 138 are set so as to satisfy the above-described average roughness Ra ≧ 1.5 μm, maximum roughness Rmax ≧ 15.0 μm, and Erichsen overhang depth of the zinc sprayed portion ≧ 4.0 mm. The knurled portion 137 ′ is configured similarly to the knurled portion 137. In addition, the code | symbol corresponding to the member corresponding to the knurled part 137 of knurled part 137 'is attached | subjected.

  As shown in FIGS. 13 and 14, the air cylinder 142 for lateral feed is disposed and fixed to the support plate 131 horizontally below the moving body 136 in the left-right (lateral) direction along the moving direction of the moving body 136. The tip of the rod is fixed to the lower surface of the moving body 136 via the bracket 143. The moving body 136 is driven by the air cylinder 142. As shown in FIG. 13, when the air cylinder 142 is retracted, the movable body 136 is located on the right side in the figure, the left knurled portion 137 is located substantially in the center, and the right knurled portion 137 ′ is located on the right end. ing. At this time, the two knurls 138 ′ and 138 ′ of the right knurl portion 137 ′ or the one knurl 138 ′ on the right side is disengaged from the right end of the terminal 100a.

  When the air cylinder 142 extends, the moving body 136 moves to the left in the figure, the left knurl portion 137 is located on the left side, and the right knurl portion 137 ′ is located substantially in the center. At this time, two knurls 138 and 138 of the left knurl part 137 or one knurl 138 on the left side is disengaged from the left end of the terminal 100a. Thereby, it is possible to perform knurling over the entire width from the right end to the left end of the terminal 100a.

The operation will be described below.
10 and 11, the same operation as that of the first embodiment is omitted, and only the operation of performing knurling by the knurling apparatus 120 will be described. In the knurling apparatus 120, the air cylinder 125 is retracted in the initial state, and is retracted as shown in FIG. As shown in FIGS. 10 and 11, when the first galvanized steel sheet 100 is transported to the processing stage S2 by the first transport mechanism 20 and placed on the suction cup 52 on the lower stage of the rotating frame 41 of the holding mechanism 40, As shown in FIGS. 12 to 14, the positioning air cylinder 133 of the corresponding lower knurl processing apparatus main body 121 extends so that the rod 133 a protrudes from the lower surface 132 a of the presser plate 132, and then the cylinder 125 extends to knurl processing. The apparatus main body 121 is moved inward as indicated by an arrow E ′, and the terminal 100a of the steel plate is introduced below the presser plate 132 for positioning. The terminal 100b is similarly positioned by the knurling device 120 ′. The positioned galvanized steel sheet 100 is held by suction on the suction cup 52 (FIG. 11).

  After the positioning, the positioning air cylinder 133 is retracted, the air cylinder 125 is retracted, and the knurling device body 121 moves to the outside indicated by the arrow E and returns to the initial position. Similarly, the terminals 101a and 101b of the second galvanized steel sheet 101 placed on the upper suction cup 62 of the rotary frame 41 are also positioned by the corresponding upper knurl devices 120 and 120 ′. The two galvanized steel plates 100 and 101 positioned and held by the holding mechanism 40 are dissolved and removed by galvanization of both terminals 100a, 100b, 101a, and 101b by the treatment liquid tanks 70 and 70 ′ in the same manner as in the first embodiment. The These terminals are washed with purified water in the purified water tanks 73 and 73 ′, washed with pure water in the purified water tanks 74 and 74 ′, and the terminal processing is completed. Then, it is held horizontally as shown in FIG.

  Next, as shown in FIGS. 12 to 14, the air cylinder 125 of the knurling device 120 is extended and the knurling device main body 121 moves inward as indicated by an arrow E ′, and the lower side of the press plate 132 is galvanized. The terminal 100a of the steel plate 100 is introduced. Next, the pressing air cylinders 140 and 140 ′ of the left and right knurl portions 137 and 137 ′ extend to press the knurls 138 and 138 ′ against the lower surface of the terminal 100a. The terminal 100a is sandwiched between the lower surface 132a of the pressing plate 132 and the rollers 138 and 138 ′. Next, the lateral feed air cylinder 142 is extended to move the moving body 136 from the right position shown in FIG. 13 to the left end position shown by a two-dot chain line. As the moving body 136 moves to the left, the knurls 138, 138 ′ of the left and right knurl portions 137, 137 ′ give a mesh-like unevenness across the entire width of the lower surface of the terminal 100a.

  Next, the pressing air cylinders 140 and 140 ′ are retracted to lower the knurl portions 137 and 137 ′, the knurling 138 and 138 ′ are separated from the lower surface of the terminal 100a, and the lateral feed air cylinder 142 is retracted and moved. The body 136 returns to the original position shown by the solid line in FIG. Similarly, the knurl processing device 120 ′ gives a mesh-like unevenness to the lower surface of the other terminal 100b. In this way, a predetermined surface roughening treatment is applied to the lower surfaces of the terminals 100a and 100b where the steel plates are bare by dissolving and removing the galvanizing. The same applies to the terminals 101a and 101b of the galvanized steel sheet 101.

  As described above, the galvanized steel sheets 100 and 101 subjected to terminal processing in the processing stage S2 are sequentially carried out of the holding mechanism 40 by the second transport mechanism 30 and transported to the post-processing stage S3. Then, the terminal-treated galvanized steel sheet 100 is formed into a cylindrical shape so that the knurled surface is on the inside, and the terminals 100a and 100b are overlapped and seam welded. Thereby, a cylindrical body is shape | molded. And zinc metallicon is given to the inner surface of the said terminals 100a and 100b by which seam welding was carried out. The inner surfaces of the terminals 100a and 100b are provided with the above-described surface roughness, whereby the adhesion of the zinc metallicon is improved and a good coating can be formed.

  Incidentally, the average roughness (Ra) of the terminal steel sheet after the knurling is 3.93 μm, the maximum roughness (Rmax) is 44.25 μm, and the average roughness (Ra) as a target value ≧ 1.5 μm. The maximum roughness (Rmax) ≧ 15.0 μm is sufficiently satisfied, and the absolute value of the roughness is other processing methods such as chemical etching (Ra = 11.2 μm, Rmax = 8.16 μm), mechanical polishing ( (Ra = 1.60 μm, Rmax 15.8 μm), which was higher than that in the case of chemical dissolution alone (Ra = 1.08 μm, Rmax = 6.41 μm). Further, the Erichsen depth was also excellent at 4.0 μm or more along the weld line direction (longitudinal direction of the terminal) as shown in FIG. As a result, it was possible to improve seam weldability and to improve the adhesion of zinc metallicon. By the way, out of 68 sheets that have been subjected to seam welding of galvanized steel sheet that has been knurled on the surface of the steel sheet from which galvanization has been removed, and then subjected to zinc metallicon treatment, 1 is the top of the wall, 1 sheet is peeled, 4 sheets Only slight cracks occurred at the top, and the others were good.

It is a front view of the terminal processing apparatus which concerns on this invention. It is a top view of the terminal processing apparatus shown in FIG. FIG. 3 is a schematic cross-sectional view of the terminal processing device shown in FIG. 1 taken along arrows III-III. It is sectional drawing which follows the arrow IV-IV of the terminal processing apparatus shown in FIG. It is sectional drawing which follows the arrow line VV of the terminal processing apparatus shown in FIG. It is an enlarged view which shows the processing liquid tank of the terminal processing apparatus shown in FIG. 3 in detail. It is an enlarged view of the hydrochloric acid tank shown in FIG. It is a schematic block diagram of the surface roughening means which concerns on this invention. It is a schematic block diagram which shows the other usage example of the surface roughening means shown in FIG. It is a front view of the terminal processing apparatus provided with the surface roughening means which concerns on this invention. It is sectional drawing which follows the arrow XI-XI direction of the terminal processing apparatus shown in FIG. It is a top view of the knurling apparatus of the front side shown in FIG. It is the end elevation seen from the arrow XIII direction of the knurl processing apparatus shown in FIG. It is sectional drawing which follows the arrow line XIV-XIV of the knurl processing apparatus shown in FIG. It is a graph which shows an example of the Erichsen depth along the weld line direction of the terminal steel plate which gave the knurling process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Terminal processing apparatus 2 Main frame 3 Base 4 Support | pillar 5 Side member 6 Cross member 15 Carriage 20 1st conveyance mechanism 30 2nd conveyance mechanism 28, 38, 52, 62 Suction cup (holding means)
29, 39 Rodless cylinder (drive means)
40 Holding mechanism 41 Rotating frame 70, 70 'Treatment liquid tank 71, 71' Hydrochloric acid tank 71c, 71'c Suction chamber (fume suction means)
71e, 71'e passage 71d, 71f small hole 80 elevating mechanism (transfer means)
90 Drive mechanism (transfer means)
100, 101 Galvanized steel sheet S1 Pre-treatment stage S2 Treatment stage S3 Post-treatment stage P1 Pallet 120, 120 ′ Knurling machine 121 Knurling machine body 122 Supporting part 136 Moving body 137 Knurling part 138 Knurling 140, 142 Air cylinder 200 Surface roughness Means 201 Knurls 202, 204 Air cylinder (actuator)
203 Knurled section 204 Support plate 206 Presser plate

Claims (5)

For the galvanized steel sheet that has been galvanized on the front and back, a terminal treatment method for a galvanized steel sheet that performs terminal treatment including removal of the galvanization from a terminal that is an edge along one side of the galvanized steel sheet,
The terminal of the galvanized steel sheet is immersed in concentrated hydrochloric acid solution to remove the zinc plating on the front and back of the terminal and remove fumes evaporating from the concentrated hydrochloric acid solution near the liquid surface of the concentrated hydrochloric acid solution,
A terminal treatment method for a galvanized steel sheet, comprising grinding the front and back surfaces of the terminal from which the zinc plating has been dissolved and removed, and then sequentially washing with purified water and pure water.   2. The terminal treatment method for a galvanized steel sheet according to claim 1, further comprising applying anti-rust oil to the front and back surfaces of the terminal washed with pure water. For a galvanized steel sheet that has been galvanized on the front and back, a terminal treatment device for a galvanized steel sheet that performs terminal treatment including removal of the galvanization from a terminal that is an edge along one side of the galvanized steel sheet,
A hydrochloric acid tank in which concentrated hydrochloric acid solution is stored and the terminals of the galvanized steel sheet are immersed to dissolve and remove the zinc plating on the front and back of the terminals;
A fume suction means provided near the liquid surface of the concentrated hydrochloric acid solution in the hydrochloric acid tank, and suctioning and removing fumes evaporated from the concentrated hydrochloric acid solution;
Grinding means for grinding the front and back surfaces of the terminal from which the zinc plating has been removed;
Purified water is stored, and a water purification tank for washing the front and back surfaces of the terminal ground by the grinding means,
A pure water tank in which pure water is stored and the front and back surfaces of the terminal washed with the purified water are washed;
Holding means for holding the galvanized steel sheet;
A terminal treatment apparatus for a galvanized steel sheet, comprising: a transport means for sequentially transporting the hydrochloric acid tank, grinding means, water purification tank, and pure water tank to perform terminal treatment of the retained galvanized steel sheet.   The terminal treatment apparatus for galvanized steel sheets according to claim 3, further comprising a rust prevention oil tank in which rust prevention oil is stored and applied to the front and back surfaces of the terminal.   The terminal of the galvanized steel sheet provided with the surface roughening means which adjusts the roughness of the surface of the front and back of the said terminal of the galvanized steel sheet terminal-processed with the terminal processing apparatus of the galvanized steel sheet of Claim 3 Processing equipment.

Images