JPH1052724A - Manufacture of metallic panel with meandering groove part and manufacture of metallic panel with meandering flow passage using metallic panel with meandering groove part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the new manufacturing method for forming the metallic panel with meandering groove parts with a small size press forming machine and manufacturing method of the metallic panel with meandering flow passage which is applicable to various uses of eliminating snow, heating, cooling, etc., using the metallic panel with the meandering groove parts obtained by the above manufacturing method. SOLUTION: After completing a 1st stage where the linear groove parts 21a, 21a... of >=4 are formed by repeating unit press works for pairing the two parallel linear groove parts 21a, 21a on a flat steel sheet 2 at prescribed intervals at required times, curve-shaped groove parts having approximately U-shape in a plane view are formed respectively in the both end parts of the adjacent linear groove parts 21a, 21a by the press work in the 2nd and 3rd stages and the metallic panel on which the meandering groove parts 21 made into one communicated shape from the bigining end to the terminal end is manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a metal panel having meandering grooves from a flat metal plate by press working, and more particularly to a novel manufacturing method suitable for forming with a small press forming machine. The metal panel with meandering grooves obtained by its manufacturing method allows the side of railway tracks such as Shinkansen and conventional lines, or the side of expressways and general roads, the sidewalks and its sides in areas with heavy snowfall. It is installed in all places where snow removal is required after snow removal, such as places where snow is removed after snow removal, or on the roof of buildings, and the surrounding area, without heating, melting, and sprinkling water. A heat medium is sealed inside for heat exchange, such as for snow removal typified by panels capable of removing snow, for heating used in oil heaters, etc., and for cooling used in refrigerators, etc. Or Forming a panel that can be ring, it is intended to provide a novel method for producing a meandering outpouring coated metal panels.

[0002]

2. Description of the Related Art As a conventional snow removal measure for Shinkansen and conventional lines passing through heavy snowfall areas, a method of spraying hot water heated by a boiler or groundwater pumped from underground around the track. Has been adopted. However, in extremely cold regions, etc., the heat loss after watering is large, especially when there is a lot of snow, it is extremely difficult to eliminate snow. It was indispensable to increase the cost, and the equipment had extremely high running costs.

[0003] In addition, in the embankment, cut section, etc., measures to prevent water penetration by watering have not been established, and if a large amount of watering is carried out, it becomes impossible to secure the track safety. The use of groundwater had to be forgotten, and the use of groundwater could lead to environmental problems such as land subsidence due to unilateral pumping of groundwater. The development of has been eagerly awaited.

As an alternative to the watering method, a non-watering type panel method capable of circulating and using groundwater or the like has recently attracted attention, and is being developed and studied for practical use at present. In the panel system, as shown in the right half sectional view of the right half of the state in which panel-type snow removal equipment is installed in the Shinkansen viaduct section in FIG. 8, the snow removal equipment 6 is a track laid on the viaduct 9. Pedestrian section 91 on both sides of part 8
The pedestal 7 is provided with a circulation pipe 7 in advance in each of the walking path portions 91.
1 are connected one after another to form a water supply section, and are piped so as to circulate through a water supply facility (not shown) provided on the ground section, while a meandering channel 11 is provided on the footrests 71, 71,. Are sequentially placed and fixed, and the water supply ports of the panels 10, 10,... Are connected to the circulation pipe 7. Or connected to the drain of the adjacent panel 1.

[0005] Groundwater pumped up by a water supply facility on the ground is forcibly pumped into the circulation pipe 7 and exchanges heat with the meandering channel 11 of the panels 10, 10, ... to radiate heat. Returning to the circulation pipe 7 on the return route, the water is heated by the water supply facility or returned to the underground to be reused as groundwater that has undergone heat exchange by geothermal heat. A heat exchanger (not shown) is connected to the circulation pipe 7, and a branch pipe extending from the meandering channel 11 of the snow removal panel 10 is also connected to the heat exchanger. The antifreeze liquid as a heat medium sealed in the branch pipe is forcibly circulated by a pump (not shown), heat exchange is performed with groundwater, and the snow cover 10 and the snow that has been removed are sequentially melted. ing. In an extremely cold region or the like, a boiler which is controlled in accordance with the amount of snow and the outside air temperature is provided so that groundwater is heated to an optimum temperature and then supplied to the heat exchanger through the circulation pipe 7. In some cases.

The snow-absorbing panel 10 employed in this non-sprinkling type panel system is formed by press-forming a single flat metal plate so that a groove 21a is formed in a meandering manner. Is formed by forming an inlet and an outlet for the antifreeze liquid, and by adding a flat metal plate 3 to the metal panel 2 having the meandering groove 21 so as to cover the upper opening of the meandering groove 21. The antifreeze liquid meandering channel 11 is formed in a pipe shape by integrating the panel into a watertight shape by welding or the like. If there is snow on the viaduct 9 such as the Shinkansen in which the panel type snow removal equipment 6 is installed, the snow on the track 8 is removed by the snow removal mechanism provided on the Shinkansen vehicle or the Russell vehicle For example, as shown by arrows in FIG. 8, the snow-absorbing panels 10 are blown toward the walking paths 91 on both sides of the viaduct 9 and collected on the snow-absorbing panels 10.
The upper snow S is temporarily heated and melted by the snow removal panel 10, and is drained from the viaduct 9 like rainwater.

[0007] As described above, the basic theory of the non-sprinkling snow removal method that can reliably wipe out the drawbacks of the conventional water-sprinkling method has already been substantially established. Technical development is considered necessary, and as one of them, establishment of an efficient and economical manufacturing technique of the snow-absorbing panel 10 is urgent. When manufacturing the snow removal panel 10 that enables effective snow removal over a wide range by press working, there is naturally a manufacturing method in which the meandering groove 21 that is continuous at a time is drawn by a large-sized press machine. However, in this manufacturing method, it is desperate that the manufacturing cost including the mold becomes extremely expensive, and this problem of the manufacturing cost becomes a major obstacle to the realization of the panel type snow removal equipment. Furthermore, when the above-described complicated uneven drawing drawing is to be performed on the entire surface of a large flat plate-shaped metal plate, everywhere in the metal plate, unless a specially-considered special press technique is used. The problem of know-how to deal with the technical problem of causing distortion and cracks in
Until now, there has been no proposal of a practical manufacturing technique that can meet the demand.

The inventor of the present application, as one of those involved in press forming, knits the press forming process of a metal plate in units capable of suppressing the distortion to a minimum, in order to deal with the above situation, Development of a new method of manufacturing a metal panel with a meandering groove that enables a panel with a desired continuous meandering groove to be manufactured even with a large-sized metal plate by using a small molding die and press machine. As a result of conducting research and repeating a number of experiments with long-term trial and error, this time finally succeeded in realizing a new method of manufacturing a metal panel with meandering grooves, and as a result, The present invention has succeeded in realizing a practical method of manufacturing a metal panel with a meandering channel, which enables safe and economical molding by the obtained metal panel with a meandering groove. What, in particular long been awaited viewed No sprinkling snow melting method embodied in is expected to continue to substantially embodied. In the following, the configuration will be described in detail together with an embodiment representing the present invention shown in the drawings.

[0009]

As will be clearly understood from the embodiments of the present invention shown in the drawings, the method of manufacturing a metal panel with meandering grooves included in the present invention includes a plurality of linear grooves, One end of each of the straight groove portions, and a curved groove portion having a substantially “U” shape in plan view connecting between the ends of two adjacent straight groove portions; Pressing the metal panel with the meandering groove formed by connecting the entire curved groove as a meandering groove is performed by disposing the curved groove on the side to be shifted one by one with respect to the curved groove on the other side. This is a manufacturing method for forming by processing, and basically has the following configuration.

That is, first, two adjacent linear grooves are paired, and the pressing is repeatedly performed at predetermined intervals repeatedly in one direction of the Y-axis of the flat metal plate.
Manufacturing a metal panel with meandering grooves, which is carried out by a step, and thereafter, a second step and a third step of forming curved grooves by separate press working on both ends of the linear grooves, respectively. Is the way.

More specifically, in the first step, two linear grooves adjacent to each other are paired, and at least one end thereof is formed on the inner curved wall surface of the curved groove to be formed. Pressing in the shape of a wide groove formed by connecting two linear grooves on the end side, which is squeezed and outside the unit is performed as a unit press process, and is performed at a predetermined interval in one direction of the Y-axis of the flat metal plate. A process in which unit press processing is repeatedly performed in turn.

In the second step, after the first step, a predetermined width including a portion narrowed to the inner curved wall surface of the curved groove to be formed on the end side on the side where the wide groove is formed. Part
A step of forming curved grooves in all wide grooves by press working to form curved grooves to be formed. Further, the third step is performed after the second step or immediately before the step, that is, after the first step, prior to the second step, on the other end side, by unit press working. A curved groove to be formed is formed in each of the two linear grooves formed as a pair except for the adjacent linear grooves at both ends in the Y-axis direction. By press working which becomes shape,
This is a method for manufacturing a metal panel with a meandering groove, which is performed in the above three steps, which is a step of forming a curved groove.

More specifically, the pressing of the target metal panel with the meandering grooves is performed by first forming two straight grooves adjacent to each other as a pair.
Each is squeezed on the inner curved wall surface of the curved groove to be formed,
Pressing in the shape of a wide groove in which two linear grooves are connected on the outer end side is unit press processing, and is directed in one direction of the Y-axis of the flat metal plate at predetermined intervals. A first step of repeatedly performing this unit press working, and thereafter, a portion narrowed to the inner curved wall surface of the curved groove to be formed on one end side where the wide groove is formed. The second step of forming the curved grooves in all the wide grooves by pressing the predetermined width portion including the curved grooves to be formed into a curved groove shape to be formed, and further in the other end side where the wide grooves are formed. Then, a predetermined width portion including a portion narrowed to the inner curved wall surface of the curved groove portion to be formed is subjected to a Y-axis direction in each of two linear groove portions formed as a pair by unit pressing. Except for the linear grooves at both ends, each pair of adjacent ones Straight groove, by pressing to be be formed curved groove shape may be a manufacturing method characterized by being performed by a third step of forming a curved groove.

The manufacturing method of the metal panel having the meandering groove portion of the present invention having the above-described structure will be described below in another description expression. [First Step] Two linear grooves at a predetermined interval and both ends thereof are narrowed down to the inner curved wall surface of the curved groove to be formed, and two ends are formed outside the curved wall. With a mold for exclusive use of the linear part, which enables unit press working in the form of a wide groove part where the linear groove parts are connected in one step, in the Y-axis direction of the flat metal plate, sequentially at predetermined intervals. A step of repeatedly performing this unit press working to form a predetermined number of four or more even-numbered linear grooves.

[Second step] The first mold dedicated to the curved portion is used to
Of all the linear grooves, at one end of each of the two linear grooves on the outermost side in the Y-axis direction, a bowl with a through hole for an inlet or an outlet is formed, and adjacent to each other by other linear grooves. Simultaneously forming, at one end of each of them, a curved groove that is substantially “U” shaped in plan view.

[Third Step] Immediately before or after the press working in the second step, the second metal mold dedicated to the curved portion is used to squeeze the inside curved wall surface of the curved groove to be formed. A curved groove having a substantially “U” shape in plan view is provided at the other end of each of the two linear grooves formed by the unit press working at a predetermined width portion of all the linear grooves including the bent portion. Forming process. According to the first to third steps, all the linear grooves are formed in one groove communicating in a meandering manner by the curved grooves at both ends, and the manufacturing of the metal panel with the meandering groove is characterized in that Is the way.

The flat metal plate is a metal plate having good press workability, such as an aluminum plate, a steel plate, a copper plate, a stainless steel plate, an alloy plate such as duralumin, and the like. When making a metal panel with a meandering groove for a snow panel, a material excellent in strength, weather resistance, corrosion resistance, etc. sufficient to withstand the weight of snow is appropriately selected,
To be adopted.

The meandering groove is formed by a plurality of linear grooves and ends on each side of the linear grooves, and is substantially a plan view connecting two linear grooves adjacent to each other. A curved groove having a U-shape, wherein the curved groove on one side is displaced from the curved groove on the other side by one linear groove at a time. The groove is formed from one end to the end, and one or more grooves are continuously formed on substantially the entire surface of the flat metal plate or at necessary places, in addition to two or more grooves. The grooves may be formed in parallel, and when two or more flow paths are formed, the curved grooves are also formed in two or more parallel curved shapes corresponding thereto. Need to be Also, this meandering groove has a cross-sectional shape orthogonal to the flow,
A cross-sectional shape with good press workability, such as an inverted trapezoidal shape, an inverted triangular shape, or a semicircle shape, is formed so as to have an optimum cross-section according to the application.

In the first step, two straight grooves adjacent to each other in the Y-axis direction are paired in the meandering grooves, and a straight line extending in the width direction (X-axis direction) of a flat metal plate of a predetermined size is formed. In the pressing step of forming in advance as a groove, at least one end side in the X-axis direction is simultaneously formed with the inner curved portion of the curved groove to be formed in a step described later. In addition, in a portion extending from the portion to the outer edge of the flat metal plate, two straight grooves forming a pair inside the inner curved portion are connected in the Y-axis direction to become one. A press formed in the wide groove is performed, and the other end in the X-axis direction may be press-formed in which the two linear grooves are formed to the edge as it is. But the end of the inner curved portion forming side From the viewpoint that it is impossible to uniformly press the entirety in the X-axis direction to escape, it is preferable that the other end side also has a wide inner groove portion and a wider groove portion outside the same as the above-described inner curved portion forming side end portion. It is assumed that press forming in which both ends in the X-axis direction are symmetrical is performed, and the press forming for forming the two linear grooves, the inner curved portion and the wide groove is unit press forming, and The required number of times at predetermined intervals toward the Y-axis direction of the flat metal plate,
This unit press working is performed.

In the first step, the unit press working is repeated a required number of times, so that the forming allowance is brought close to reduce the amount of deformation due to the generation of internal stress and the deformation after forming can be reduced. In addition, the press range is small, and the aim is to enable processing with a relatively small press machine. The unit press working is performed by sequentially forming the flat metal plate from one end in the Y-axis direction to the other end at predetermined intervals, and from the center of the flat metal plate in the Y-axis direction to both ends in the Y-axis direction. There is a method of sequentially forming and shaping, and it is not impossible to carry out these unit press working by a method of moving the mold side in parallel at a predetermined pitch, but usually, a flat metal plate is fixed. In this method, the plate-shaped metal plate is moved relative to one linear portion-dedicated die by moving the plate-shaped metal plate into the press die portion.

In the second step, one end in the X-axis direction of a plurality of linear grooves formed in a predetermined number in the first step,
In particular, press working is performed in which the ends of the two linear grooves formed in each unit press work in the first step are connected to each other by a curved groove that curves gently. The pressing of the curved groove portion forms a predetermined width portion from the end side edge to a predetermined portion including the inner curved portion (therefore, a portion including each end portion of the linear groove portion is formed). The wide groove is narrowed and formed into a curved groove having a predetermined shape. The mold matches the inner curved portion formed in the first step and each end of the two linear grooves. The curved groove formed by this press working is designed to communicate with the outside of each end of the two linear grooves in an accurate and smooth shape as designed. Should.

In the second step as well, as in the first step, the press working is performed a predetermined number of times between the ends of the two linear grooves in a predetermined number of times. However, from the viewpoint of efficiency, the entirety of the two linear grooves formed in each unit press working in the first step are replaced with two linear grooves forming a pair from the efficiency in the Y-axis direction. It is desirable to use a mold in which all the end portions for each groove portion are formed into a plurality of curved groove portions by one press working.

The third step is a step of forming a curved groove as predetermined on the other end of the plurality of linear grooves in the X-axis direction, which is not performed in the second step. The molding of the curved groove portion in the above, the curved groove portion forming position, in any one direction of the Y-axis, must be a press process in which the linear groove portion is formed by shifting by one line, as a result, Except for the other end of the outermost linear groove in the Y-axis direction, all the linear grooves are connected to each other alternately by curved grooves and communicate with each other, and the metal formed in the meandering groove is formed. It will be formed on the panel.

Therefore, the first dedicated bending portion for the second step is used.
A mold and a second mold dedicated to the curved portion for the third step are required.
At the other end of the outermost linear groove in the axial direction, if a mold capable of simultaneously forming a bowl with a through hole for an inflow port and an outflow port is provided, the inflow port and the outflow port are formed in advance in the meandering groove section. It is possible to form a metal panel having meandering grooves formed at the start end and the end, which is very convenient. However, when a mold that can simultaneously form the bowl with the through hole for the inflow port and the outflow port is not used, the bowl with the through hole for the inflow port and the outflow port is replaced with the first mold dedicated to these curved portions. The molding is performed in a separate process using a dedicated mold different from the second mold dedicated to the curved portion. The order of the second step and the third step is not particularly limited, and the third step is performed immediately after the first step, and then the second step is performed, prior to the second step. However, there is no possibility that the method of manufacturing a metal panel with a meandering groove according to the present invention is hindered.

[0025]

Other related inventions The present invention relates to a method of manufacturing a metal panel with a meandering groove, which has been disclosed above. The present invention relates to a method of manufacturing a metal panel with a meandering channel using a metal panel with a meandering groove having the following configuration. A method is included. That is, the metal panel with the meandering groove portion of the metal panel with the meandering groove portion formed by the above-described manufacturing method is brought into contact with the other metal panel with the meandering groove portion in a symmetrical arrangement with the metal panel with the meandering groove portion on the groove opening side of the meandering groove portion. Or, a flat metal plate is abutted, and the abutting portion is integrated in a watertight manner by seam welding or the like, and is a linear groove at both ends in the panel Y-axis direction,
In the case of an unformed end of the curved groove, which has not been formed in advance into a bowl with a through hole for an inlet or an outlet, the inlet or the outlet is perforated. After forming the panel with the meandering flow path, the channel material and other reinforcing frames are joined and integrated along the peripheral edge of the panel and, if necessary, the Y-axis direction at the required position in the X-axis direction of the panel. Metal with a meandering channel by means of a metal panel with meandering grooves, which is formed into a panel incorporating a meandering flow path that imparts rigidity and allows the heat medium to pass in a meandering shape from the inlet to the outlet. This is a panel manufacturing method.

The metal panel with a meandering channel is manufactured using a metal panel with a meandering groove manufactured according to preset conditions so as to have a meandering channel cross section according to the overall size and the amount of supplied fluid. A metal panel with two meandering grooves is prepared, and the respective groove openings of the two meandering grooves are brought into contact with each other in a symmetrical arrangement with a pot-like shape, or a metal panel with one meandering groove is provided. A flat metal plate is prepared, and the flat metal plate is attached so as to close the groove opening side of the metal panel with the meandering groove, and the abutting portion or the additional portion is made watertight by seam welding or the like. By means of integration, first, a main panel into which a basic meandering channel is incorporated is manufactured, and the periphery of the main panel and, if necessary, the panel in the X-axis direction and along the required Y-axis direction at the required position. Channel material and others Bonding a reinforcing frame, integral, and panels meeting the set conditions.

At the beginning and end of the meandering channel, an inlet and an outlet are formed at the stage of manufacturing the metal panel with the meandering groove or in a process different from that, to supply and circulate the heat medium to the entire meandering channel. Manufacture as possible. In addition, the inflow port and the outflow port are located outside the corners on one side of the panel, and if necessary, the serpentine flow path is set in advance at the panel diagonal position so as to be provided at the diagonal position of the panel. It is, of course, possible to regulate the production so that Below,
Specific examples are described so that the configuration of the method for manufacturing a metal panel with a meandering groove of the present invention and the method for manufacturing a metal panel with a meandering channel using the metal panel with a meandering groove will be clearer. I will add an explanation with it.

[0028]

Embodiment 1 A plan view showing a state in which the flat metal plate of FIG. 1 has been subjected to a first unit press working, an AA enlarged side view in FIG. 2 of FIG. 1, and a flat plate of FIG. FIG. 4 is a plan view showing a state in which the second unit press working is performed on the metal plate, and FIG. 5 is a plan view showing a state in which all the linear grooves in FIG. According to a plan view showing a state in which the curved groove portion has been pressed and processed only on the X-axis direction end side which is the bowl portion forming side with the through hole for the inlet and the outlet, it is processed in that process in chronological order. The metal panel is shown in the folded state.

As can be clearly understood from the drawings, the method for manufacturing a metal panel with meandering grooves according to the present invention is as follows.
First, a flat iron plate having a width (X-axis direction) of about 2700 mm, a length (Y-axis direction) of about 920 mm, and a thickness of about 1.6 mm is subjected to a hot-dip galvanized flat iron plate as shown in FIG. The linear groove 21a of the trapezoidal concave groove (groove width 34 mm) has a distance of 10 mm between the two grooves (accordingly,
(The groove pitch is 44mm)
On both ends in the groove direction of the two linear grooves 21a, inner curved wall surfaces 23a, 23a are formed at positions approximately 70 mm from the respective edges of the flat iron plate in the X-axis direction, and the inner curved wall surfaces 23a, 23a are formed. The first press working is performed by a 350t press machine using a not-shown mold for a straight part for performing a unit press working so as to be formed on the outside from the two straight lines as shown in FIG. Groove 21a,
21a and the inside curved wall surfaces 23a, 23a and the wide groove portions 22, 22 are simultaneously press-formed over the entire width of the flat iron plate.

Subsequently, the flat iron plate 2 is fed and moved in the Y-axis direction by 88 mm corresponding to the pitch of two grooves, and the second unit press working is performed by the same mold dedicated to the linear portion, thereby obtaining the figure. A metal panel processed to the state shown in the plan view 3 is obtained, and thereafter, the same unit press working is repeated for the third time, the fourth time,... As shown in the figure, the first step of forming an even number of linear grooves 21a, 21a,... In parallel over the entire surface at equal intervals is completed. From the manufacturing process, the production in the first step is performed by using a large number of flat iron plates 2, 2,
.., One after another, and the even number of linear grooves 21a, 21
a,... are formed in a state where they are formed in parallel at equal intervals over the entire surface, and the plurality of processed panels are collectively turned to the next second step and subsequent steps, whereby a large number of meandering is efficiently performed. The manufacturing method can be a method of forming a metal panel with grooves.

In the second and third steps, as shown in FIG. 4, after the linear grooves 21a, 21a,... Are formed on the entire surface, the X of the linear grooves 21a, 21a,.
Press processing is performed on the rectangular ranges P1 and P2 surrounded by the two-dot chain line corresponding to each end in the axial direction. In the embodiment, as shown in the plan view of FIG. 5 showing the state after the processing, the outermost one of each of the rectangular areas P2 is set.
Except for the straight grooves 21a, 21a, the straight grooves 21a, 21a,..., Straddle the wide grooves 22 and 22 formed separately by unit press working at respective ends of adjacent ones. .. Are formed in a substantially U-shape in plan view, and the outermost linear grooves 21a and 21 are removed.
At the end of the first part 1a, a second step using a second mold dedicated to the curved portion, in which the bowl portions 24, 24 with through holes for the inlet and the outlet are pressed together, is subjected to the first step. Following the process, it is performed in a separate process.

Subsequently, in the third step, the remaining rectangular area P1 was formed by unit press working at each end of the linear grooves 21a, 21a formed for each unit press work in the first step. A curved portion 23, 23,... Having a substantially “U” shape in plan view is formed in the wide width groove portion 22 so that the inner curved wall surface can be formed so as to match the already formed inner curved wall surface 23a. .. Are formed on the other end side in the X-axis direction of all the linear grooves 21a, 21a,... By the exclusive first die, and are simultaneously formed in the previous second step. All the linear grooves 21a, from the bowl 24 with the through hole for the water intake to the bowl 24 with the through hole for the outlet,
Press processing is performed so that 21a,.

As described above, in the method of manufacturing a metal panel with a meandering groove according to the present invention, in addition to the die for exclusive use of the straight portion to be subjected to the unit press working in the first step, the curved section for carrying out the second step and the following steps. A first mold and a second mold dedicated to the bending portion are required. In addition, the above-described second step and third step include:
It is not always necessary to follow this order, and after the first step, contrary to the embodiment, the pressing of the rectangular area P1 performed in the third step is preceded, and then the other rectangular area P2 is formed. There is no problem even if the step corresponding to the second step is performed last in the working example in which the press working is performed.

[0034]

Embodiment 2 FIG. 6 is a plan view, and FIG. 7 is a cross-sectional view of an enlarged BB main portion, showing a meandering channel manufactured using the meandering grooved metal panel 1 manufactured according to the first embodiment. A specific example of the metal panel 10 is shown. The metal panel 10 with a meandering channel has a flat metal plate 3 for heat exchange attached to the groove opening side of the meandering groove 21 formed in the metal panel 1 with the meandering groove, and the groove opening of the meandering groove 21 is provided. By closing the sides and integrating them in a watertight manner by means of seam welding or the like, a panel having a meandering flow path 11 connected to one with a substantially trapezoidal cross section is formed. A reinforcing frame 4 made of shaped steel, such as a channel material or an angle material, is attached and integrated by welding, and the reinforcing frame 4 is used as a supporting portion. It is manufactured such that the cross bars 41, 41 of the book are laid laterally and attached, and the whole structure is reinforced.

The flat metal plate 3 used for heat exchange needs to have a sufficient heat conductivity and a sufficient strength to withstand a snow load and walking. If there is no problem in strength, aluminum, steel plate, copper plate and other materials can be used. The watertight integration of the metal panel 1 with the meandering groove and the flat metal plate 3 is as follows.
In addition to the above-described seam welding means, a method of interposing a packing such as a rubber sheet between the two and joining the contact portions with each other with bolts and nuts, or integrating with a heat and water resistant adhesive, or Alternatively, it is also possible to manufacture a dedicated clip-shaped fastening member and to use means for integrating the outer surfaces of both into a sandwiched shape.

[0036]

[Operation] In the manufacturing method of the metal panel 1 with the meandering groove,
First, the linear groove 2 to be formed by the mold dedicated to the linear part
1a, 21a,..., The first step of repeating the unit press working in pairs of two pieces a required number of times in one direction of the Y-axis of the flat metal plate is mainly performed in FIG. Y
Pressed one by one in the axial direction one by one at a time, working from one side to the other side so that it can be dragged in sequence, and the deformation in the X-axis direction perpendicular to this was also extremely small. The manufacturing method is performed so that the Y-axis of the flat metal plate is restricted by the deformed portions, such as when pressing is performed at one time over the entire width of the flat metal plate in the Y-axis direction. Smooth shrinkage movement in the direction is alienated, so that the pressing force is extremely concentrated on each deformed part and the material strength is deteriorated, and the adverse effect of causing large distortion on the entire plate is reliably avoided. Will be done.

This operation is further achieved by a method of manufacturing in which the bending process of the curved groove portion 23, which is the most severe deep drawing, is transferred to another process after the second process, mainly in the Y-axis direction by the first process. Is limited to drawing deformation in the X-axis direction, which does not overlap with the forming process in the X-axis direction, and also in the X-axis direction within a very limited range only from the inner curved surface portion 23a formed in the first step to the outer direction. Is more reliably and safely performed, and the pressing itself in the second and subsequent steps can be performed extremely easily.

Also, in the manufacture of the metal panel 10 having a meandering flow path, the material does not cause excessive deformation and each part has sufficient structural strength as if it were manufactured by a combination of simple deformations. The highly reliable metal panel 1 with meandering grooves is used as it is, and a flat metal plate is attached to the groove opening side of the meandering groove 21 and integrated, or two metal panels 1 and 1 with meandering grooves are used. A main panel that realizes a meandering channel 11 having a highly reliable watertight structure can be manufactured by integrating the grooves so that their groove opening sides are opposed to each other. The method of attaching the main panel to a required portion of the main panel has a sufficient strength, and can achieve a target production without requiring special deformation correction.

The metal panel 10 having a meandering flow path completed in this way can be used for various purposes for heat-exchanging heat from the heat medium by appropriately enclosing or refluxing a heat medium in the meandering flow path 11, for example, snow removal. , Heating, cooling, etc. can be applied as a very light heat-exchangeable panel, and the effects such as snow removal, heating, cooling, etc. suitable for each use can be reliably and economically achieved. .

[0040]

The method of manufacturing a metal panel with a meandering groove according to the present invention realized by the above-described structure requires a press machine with a capacity of 2000 t or more, according to the conventional integrated press working method. In addition, using a press machine of about 350t at most, a meandering groove part that is meandering in a single piece with a total length is formed on a flat metal plate of a size that is considered to be impossible to manufacture unless it depends on special know-how, In addition, it has realized an extremely excellent manufacturing method that enables easy manufacturing with the conventional press technology, and with this excellent manufacturing method, highly reliable accuracy and strength In the method of manufacturing a metal panel with a meandering channel, which is manufactured by adopting a metal panel with a meandering groove formed in
The advantage of the metal panel with meandering grooves manufactured by the new manufacturing method is used as it is, and extra processing steps that would be required if the conventional processing means such as special correction means were used. Instead, the metal panel has an extremely simple structure, and can be reliably and economically manufactured as a metal panel with a meandering channel that can be used for a heat exchange panel or the like having a wide range of applications.

In particular, snow removal by the non-sprinkling snow removal panel method is a snow removal method for Shinkansen bullet trains in cold regions, which is effective not only in terms of snow removal efficiency but also in terms of economy and environmental protection.
While its superiority has been confirmed, the production of the huge number of snow-removal panels required for the method is impossible unless individual press panels of 2000t or more are introduced, and individual panels cannot be produced. A large amount of upfront investment is indispensable, such as the introduction of the press machine alone requires a large amount of capital investment, a large die also requires a separate budget, and also requires the development of special processing techniques. However, since it had caused the production cost to rise significantly, its practical application was hampered. On the other hand, the establishment of the manufacturing method of the present invention has ensured that snow removal by the non-sprinkling snow removal panel method is realized extremely economically, and the safety of the Shinkansen in cold regions is reduced. That can be advanced to secure much, it can be said that it were made to those which can produce a national ramifications.

The method of manufacturing a metal panel having meandering grooves, which is a representative example of the present invention and is shown in the first embodiment, has two linear grooves 21a, 21a, and inner curved wall surfaces at predetermined positions on both ends in the X-axis direction. The first step is performed by performing a required number of times of unit pressing in the Y-axis fixed direction of the flat metal plate 2 using a mold dedicated to the straight portion having the unit 23a and the wide groove portion 22 as one unit. Curved groove 2 mainly due to deformation in the direction
Since the pressing steps 3, 23,... Are performed separately from the second step, the deformation movement of the flat metal plate 2 in the Y-axis direction in the manufacturing method according to the present invention is almost without difficulty. Smoothly implemented, deformation movement during the deep drawing stage in the X-axis direction is also kept within an extremely limited range, and there is a meandering groove part with extremely low distortion as a whole, high manufacturing accuracy and high member strength as a whole. The manufacturing method of the metal panel with the meandering channel according to the second embodiment using the metal panel 1 with the meandering groove manufactured with such excellent features is naturally also simple. A high quality product with a simple structure can be produced very economically.

As described above, the method for manufacturing a metal panel with a meandering groove and the method for manufacturing a metal panel with a meandering channel using the metal panel with a meandering groove according to the present invention can reliably achieve the intended purpose by a novel constitutional means. This can be achieved, and the equipment to be used can be reduced to the conventional extremely common press working equipment.In addition, the conventional integrated molding that cannot be avoided even with the specially devised technology Unlike the case of the press, the distortion generation rate of the entire plate can be suppressed as much as possible, and the processing accuracy can be maintained at a high level to improve the product yield and non-defective product rate. Since it is an almost ideal manufacturing method, such as being extremely economical to manufacture, it is very useful for the production and spread of metal panels for heat conversion for various applications, High evaluation is expected to be obtained as have no sprinkling snow melting essential and is snow melting panel manufacturing techniques have the practical use of methods as Shinkansen melting snow equipment for snow areas.

[Brief description of the drawings]

The drawings show a typical embodiment required for explaining the technical idea of the method for manufacturing a metal panel with a meandering groove and the method for manufacturing a metal panel with a meandering channel using the metal panel with a meandering groove according to the present invention. Things.

FIG. 1 is a plan view showing a state in which a first press working is performed on a flat metal plate.

FIG. 2 is an enlarged main part side view of a portion AA in FIG. 1;

FIG. 3 is a plan view showing a state in which a second press working is performed on a flat metal plate.

FIG. 4 is a plan view showing a state in which press working of a linear groove is completed.

FIG. 5 is a plan view showing a state in which pressing of one curved groove is completed.

FIG. 6 is a plan view showing a completed metal panel with a meandering channel.

FIG. 7 is an enlarged cross-sectional view of a main part taken along a line BB in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal panel with a meandering groove part 2 Flat iron plate for forming a meandering groove part 21 Same meandering groove part 21a Same straight groove part 22 Same wide groove part 23 Same curved groove part 23a Same inner curved wall surface 24 Same Bowl with water inlet and outlet through hole Part 3 Flat iron plate for heat exchange 4 Reinforcement frame 5 Reinforcing bar 10 Metal panel with meandering channel 11 Meandering channel S Snow

[Procedure amendment]

[Submission date] November 14, 1996

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Fig. 8

[Correction method] Added

[Correction contents]

FIG. 8 is a partial front sectional view showing a use state.

Claims (6)

[Claims] 1. A substantially “U” in plan view that connects a plurality of linear grooves and ends of each of the linear grooves adjacent to each other and two adjacent linear grooves. And a curved groove on one side is displaced by one linear groove from the curved groove on the other side, so that the whole is one. Press processing of a metal panel with a meandering groove portion connected and formed as a meandering groove portion first forms two adjacent linear groove portions as a pair,
A first step in which pressing is repeatedly performed at predetermined intervals sequentially in the Y-axis direction of the flat metal plate, and thereafter, curved grooves are formed at both ends of the linear grooves by separate pressing. A method of manufacturing a metal panel with meandering grooves, which is performed by the second step and the third step. 2. A substantially “U” in plan view that connects a plurality of linear grooves and ends on each side of the linear grooves, and connects two linear grooves adjacent to each other. And a curved groove on one side is displaced by one linear groove from the curved groove on the other side, so that the whole is one. Press processing of a metal panel with a meandering groove formed to be connected as a meandering groove first forms a pair of two linear grooves adjacent to each other, and should be formed on at least one end side thereof. Pressing is performed on the inner curved wall surface of the curved groove portion, and a pressing process of forming a wide groove portion in which two linear groove portions are connected at an end portion outside the curved wall portion as a unit press process. Repeatedly press the unit at predetermined intervals in the direction of one axis A first step to be performed, and thereafter, a predetermined width portion including a portion narrowed to the inner curved wall surface of the curved groove portion to be formed on the end side on the side where the wide groove portion is formed should be formed. The second step of forming curved grooves in all wide grooves by press working to form curved grooves,
On the other end side, in each of two linear grooves formed as a pair by unit pressing, adjacent ones except for the linear grooves at both ends in the Y-axis direction are paired. A method of manufacturing a metal panel with meandering grooves, which is performed in the third step of forming the curved grooves by pressing the linear grooves into the shape of the curved grooves to be formed. 3. A substantially “U” in plan view connecting a plurality of linear grooves and ends of each of the linear grooves adjacent to each other and two adjacent linear grooves. And a curved groove on one side is displaced by one linear groove from the curved groove on the other side, so that the whole is one. Press processing of a metal panel with a meandering groove portion formed by connecting as a meandering groove portion first forms a pair of two linear groove portions adjacent to each other, and has curved portions to be formed at both end portions, respectively. The Y-axis of a flat metal plate is defined as a unit press process in which the shape is formed into a wide groove portion in which two linear grooves are connected to each other on the outer end portion side, which is narrowed to the inside curved shape of the groove portion. This unit press working is repeated repeatedly at predetermined intervals in one direction. And forming a predetermined width portion including a portion narrowed to an inner curved wall surface of the curved groove portion to be formed on one end side where the wide groove portion is formed. A second step of forming curved grooves in all wide grooves by press working to form curved grooves to be formed,
Further, a predetermined width portion on the other end side where the wide groove portion is formed, including a portion narrowed to the inner curved wall surface of the curved groove portion to be formed, is formed as a pair by unit press working. In each of the two linear grooves, adjacent ones except for the linear grooves at both ends in the Y-axis direction are paired, and these linear grooves are pressed into a curved groove shape to be formed in these linear grooves. A method of manufacturing a metal panel with meandering grooves, which is performed in a third step of forming a curved groove. 4. A step of forming a curved groove in the third step, wherein a bowl with a through hole for an inlet or an outlet is simultaneously formed at a predetermined position at an end of the linear groove at both ends in the Y-axis direction. The method for manufacturing a metal panel with a meandering groove according to any one of claims 1 to 3, wherein: 5. The two linear grooves at a predetermined interval, and both ends thereof are narrowed down to the inner curved wall surface of the curved groove to be formed, and two ends are formed outside the curved grooves. With a mold for exclusive use of the linear part, which enables unit press working in the form of a wide groove part where the linear groove parts are connected in one step, in the Y-axis direction of the flat metal plate, sequentially at predetermined intervals. This unit press process is repeatedly performed to form a predetermined number of four or more even-numbered linear grooves, and the first die dedicated to the curved portion is used to form a Y-axis in all the linear grooves. At one end of each of the two linear grooves on the outermost side in the direction, a bowl portion with a through hole for an inlet or an outlet is formed, and at one end of other linear grooves adjacent to each other, a plan view is formed. The second step is to simultaneously form curved grooves that are substantially “U” shaped. In two steps and immediately before or after applying the press work in the second step, a portion narrowed to the inner curved wall surface of the curved groove to be formed by the second mold dedicated to the curved portion is included. A third groove for forming a substantially U-shaped curved groove in a plan view at the other end of each of the two linear grooves formed by unit press working in a predetermined width portion of all the linear grooves; A method of manufacturing a metal panel with meandering grooves, wherein all the straight grooves are formed into one groove communicating in a meandering manner by curved grooves at both ends. 6. A meandering groove formed on the metal panel with a meandering groove formed by the method according to any one of claims 1 to 5, wherein the meandering groove has a meandering groove formed on the groove opening side of the meandering groove. A metal panel with a contact is abutted in a symmetrical arrangement, or a flat metal plate is abutted, and the abutting portion is integrated in a watertight manner by seam welding or the like, and linear grooves at both ends in the Y-axis direction of the panel are provided. In the case where the unformed end of the curved groove portion has not been formed in advance into a bowl with a through hole for an inflow port or an outflow port, the inflow port or the outflow port By forming a panel with a meandering flow path by drilling, the peripheral edge of the panel, and, if necessary, the channel material and other reinforcing frames are joined along the Y-axis direction of the panel X-axis direction, Integrated to give rigidity, from the inlet A method of manufacturing a metal panel with a meandering channel using a metal panel with a meandering groove, wherein the panel is formed with a meandering channel that allows the heat medium to pass in a meandering shape toward the outlet. .