JP4843019B2 - Metal plate thermal bonding apparatus and thermal bonding method - Google Patents

Description

BACKGROUND OF THE INVENTION (a) Technical Field The present invention relates to an apparatus and a method for thermally joining metal plate materials. More specifically, the present invention provides an advantage of the metal plate material that has the advantage that the metal plate material can be removed and bonded at the same time, and a strong bonding pressure can be applied to the metal plate material to strengthen the bonding force between the metal plate materials. The present invention relates to a thermal bonding apparatus and a thermal bonding method.

(B) Description of Related Art In general, a welding method is well known as a method of joining two metal plate materials. However, when the metal plate material is thick or the metal plate materials are different from each other, it is difficult to join them by a welding method. In particular, in the hot rolling process, in order to continuously roll a thick metal plate, the moving thick metal plate must be quickly joined. Therefore, the welding method is hardly used in the hot rolling process.

  Therefore, a pressure welding method is used to join the metal sheets in the hot rolling process. However, in the pressure welding method, impurities such as an oxide film on the joint surface of both metal plate materials must be removed. Therefore, the oxide film removal process must be additionally preceded.

  In recent years, methods for performing the oxide film removing step simultaneously with the bonding step have been studied.

  For example, in Korean Patent Publication No. 2001-0062404, two metal plates that are not cut are stacked, and then the upper and lower shear blades having triangular prism-shaped protrusions are formed in the thickness direction of the metal plate. It is disclosed to apply a pressure in a direction inclined with respect to the metal plate members. At this time, in order to reinforce the joining force of the metal plate material, the triangular prism-shaped projections clamp the metal plate material and compress the joining surface. Moreover, since the joining surface of the metal plate material is formed to be inclined with respect to the thickness direction, the metal plate material is well joined in the next rolling step.

  However, when clamping with a triangular prism-shaped projection, the pressure applied to the joint surface may be reduced, or scratches may occur.

  In Korean Patent No. 0293284, in order to reinforce the bonding force, the two metal plates to be joined are tilted by forming irregularities, and then one irregularity is firmly fitted to the other irregularity. A method is disclosed.

  However, there is a possibility that an unevenness forming step is additionally required, or the unevenness is formed in an inclined shape, so that sufficient pressure cannot be obtained to press the metal plate material.

  Korean Patent No. 0382011 discloses a method in which two metal plates are fixed by a clamp, both metal plates are sheared with reference to one clamp surface, and then a bonding load is applied to the bonding surfaces.

  As described above, in most methods for joining heated metal sheets, a shear surface is formed at the tip of the metal sheet, and at the same time, pressure is applied to the shear surface of the metal sheet by a clamp.

  According to the above method, in order to join the tips of the metal plates, a shearing surface is formed by a shearing die, and a joining pressure is applied to the shearing surface by a simple clamping operation.

  According to the above method, since the length is larger than the width of the metal plate material, it is not possible to apply pressure horizontally to the tip of the metal plate material. Therefore, after stacking the metal plate materials instead of matching the tip portions of the metal plate materials, the overlapping metal plate materials are joined by applying a shear load. For example, in a state where two metal plates are fixed by a clamp, pressure is applied in a direction perpendicular to the surface of the metal plate to shear the metal plate, and a joining pressure is applied along the surface of the metal plate. In this case, since the metal plate is sheared and bonded at the same time, impurities such as an oxide film cannot intervene on the bonding surface. However, since the metal plate material is joined only by the shearing force and the clamping force, the joining pressure applied perpendicularly to the joining surface may be weakened. In order to solve such problems, many studies have been conducted on improving the shape of the shear blade.

  In contrast, Korean Patent No. 0261204 discloses a method of forming a joining surface on the overlapped surfaces after overlapping the front end surfaces of metal plates. According to this method, after the oxide film on the joint surface is mechanically removed by a reducing flame, the joint portion of the metal plate material is pressurized to join the metal plate material.

  However, in this method, in order to join the overlapping surfaces of the metal plate materials, an oxide film removal process must be preceded, and the metal is pushed out in the width direction, and the width of the metal plate material is increased. In some cases, a trimming process may be necessary.

  When joining metal plate materials with a strong forging pressure regardless of shearing, the joining pressure can be increased. However, there are a number of problems such as the need for a prior process to remove the oxide film on the bonding surface and the need for an additional trimming process because the metal is extruded in the width direction of the metal plate. There is a risk of doing. In order to solve such a problem, the width of the overlapping portion of the metal plate material is formed smaller than the remaining portion. Therefore, in this case, an additional trimming process is not necessary.

  However, in this case as well, there is a possibility that processing for narrowing the width of the overlapping portion of the metal plate materials may be required.

  The above information disclosed in this background section is intended to assist in understanding the background of the present invention, and thus includes non-prior art information known to those skilled in the art in this country.

Korean Patent Publication No. 2001-0062404 Korean Patent No. 0293284 Korean Patent No. 0382011 Korean Patent No. 0261204

SUMMARY OF THE INVENTION The first advantage of the present invention is that the metal plate material is restricted in movement and strongly bonded because a vertical pressure is applied to the overlapping portion of the metal plate material by a clamp that applies a strong clamping force. The point is that pressure is maintained.

  The second advantage of the present invention is that, when the metal plates are joined, the metal is extruded into the space formed in the shaving mold instead of being extruded along with the oxide film in the width direction of the metal plate.

  The third advantage of the present invention is that the joining force is obtained by removing the oxide film and joining the metal plates overlapped by the plastic flow with strong pressure inside the sealed joining mold. There is a point that is strengthened.

  A fourth advantage of the present invention is that when a metal plate is inserted into a joining mold, the oxide film is cut by a shaving blade inside the joining mold, and the cut oxide film is collected in the space of the shaving mold. Thus, the bonding step and the oxide film removal step are performed simultaneously.

  According to the present invention, each joining mold is formed into a trumpet shape whose height increases outwardly, and the metal plate material is accurately inserted into the joining portion, thereby allowing the subsequent metal plate material to be The front end and the front end of the preceding metal plate can be easily inserted into the joining mold. Moreover, according to this invention, by attaching a some wheel to the lower end part of a joining metal mold | die, a joining metal mold | die is moved with a metal plate material, and a metal plate material is joined simultaneously.

  According to the present invention, in order to solve the above problems, the overlapping metal plates are compressed in the vertical direction, and the excess material and the oxide film are extruded into the space of the shaving mold instead of being extruded in the width direction of the metal plate. At the same time, the metal material is pressed by plastic flow.

  According to the present invention, when the metal plate material is inserted into the joining mold, the overlapping surface of the metal plate material is cut by the shaving blade of the shaving mold attached to the tip of the metal plate material, and the oxide film is cut. The formed oxide film is collected in a space formed at the tip of the shaving blade. Therefore, the oxide film is automatically removed and the metal plate material is joined.

  According to the present invention, at the time of joining metal plates, the oxide film of the metal plate and the tip of the metal plate are pushed into the space of the shaving mold by plastic flow, so that the oxide film is automatically removed and pure metal is removed. The metal plate material is joined with the surface exposed. Therefore, according to the present invention, there is no need for a preceding process for removing the oxide film and an additional process for trimming excess metal, and strong bonding and oxide film removal are simultaneously performed.

  Further, according to the present invention, in the case of the hot continuous rolling process in which the metal plate material moves, a wheel is formed at the lower end portion of the joining device, whereby the trailing metal plate material is generated by the inertial force of the moving subsequent metal plate material. The tip portion of the wire is automatically inserted into the inside of the joining mold through the trumpet-shaped insertion port to move the joining device. Further, according to the present invention, the two preceding metal plate members are automatically joined by being automatically inserted into the inside of the joining die through the trumpet-shaped insertion port of the joining die in which the stopped preceding metal plate member moves. It overlaps the position and is joined while moving.

An example of a metal plate material thermal bonding apparatus for applying pressure to stacked metal plate materials to thermally bond metal plate materials according to an embodiment of the present invention includes the following:
Support frame;
An upper joining mold installed on the upper part of the support frame and provided with a clamp cylinder for clamping the metal plate;
A lower joining mold installed at a lower part of the support frame and provided with a clamp cylinder for clamping a metal plate;
A shaving mold having a shaving blade for cutting an oxide film of metal plate material and excess metal;
A lower clamp which is installed corresponding to the upper joining mold and slidably inserts the shaving mold; and is installed corresponding to the lower joining mold and moves the shaving mold horizontally. Inserted upper clamp.

  The clamp cylinders of the upper and lower joining molds may be connected to the lower and upper clamps by cylinder rods, respectively.

  The upper joining mold and the upper clamp are formed in a male shape, and the lower clamp and the lower joining mold are formed in a female shape surrounding the upper joining mold and the upper clamp, respectively. The lower joining mold and the upper clamp can be closely engaged with each other.

  A plurality of rods are formed on one side of the shaving mold, and a plurality of spring insertion holes for inserting the rods are horizontally drilled in the lower part of the upper clamp and the upper part of the lower clamp, A support portion for supporting the discharge spring can be formed.

  The shaving mold may have a curved surface opposite to the one side surface on which the rod is formed.

  A dust storage space can be formed on the surface of each shaving mold that contacts the metal plate.

  A trumpet-shaped insertion opening for inserting a metal plate material is formed on the left and right sides of the upper and lower joining molds and the lower and upper clamps, and the height of each inlet portion can increase outward. .

  A sliding rod is installed at the upper end of the upper clamp and the lower end of the lower clamp, and a stopper is provided at the lower end or upper end of each sliding rod, so that the position of the upper and lower clamps can be adjusted according to the thickness of the metal plate material. Has been.

  The sliding rod may be elastically supported by a protruding spring.

  The upper part of the upper joining mold is extended above the upper clamp, and a sliding rod connected to the upper end of the upper clamp can pass through the extended part.

  A wheel may be installed at the lower end of the support frame.

  On the other hand, according to an example of the method of thermally joining the metal plate materials by applying pressure to the overlapping metal plate materials, the metal plate material is inserted into the joining mold for joining the stacked metal plate materials, and at the same time, the shaving blade that cuts the overlapping metal plate materials is used. It is possible to remove the oxide film on the surface where the metal plates overlap.

  Moreover, it is possible to apply pressure to the metal plate material to join the metal plate material, and to push the excess metal after joining into an excess metal storage space for storing excess metal.

  Hereinafter, an example of an apparatus for hot bonding metal sheets according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows a cross-sectional view of a bonding mold according to an embodiment of the present invention.

  As shown in FIG. 1, according to the present invention, the metal plate material is overlapped by the upper bonding die 7 and the lower bonding die 8, and a vertical compressive load is applied to the overlapping surface 5. In this case, the oxide film of the metal plate material is removed by the shaving mold 11 installed at the tip of the clamp, and at the same time the surface 5 on which the metal plate material 1 overlaps is joined.

  The joining force when using a conventional shearing blade may be stronger than when using the upper joining die 7 and the lower joining die 8. However, the oxide film on the overlapping surface 5 and the tip 4 of the metal plate must be removed, and a process for trimming excess metal 6 extruded in the width direction of the metal plate 1 in the joining process must be added. There are many problems.

  Therefore, as shown in FIG. 1, in order to obtain a strong bonding force, the oxide film on the overlapping surface 5 is cut with the shaving blade 12 before the two metal plate materials 1 overlap, and the excess metal is stored in the shaving blade 12. By forming the space 14, the excess metal 6 is pushed out to the excess metal storage space 14 of the shaving mold 11, and at the same time, the oxide film at the tip 4 of the metal plate material is also discharged to the excess metal storage space 14. It is. Therefore, according to one embodiment of the present invention, an additional trimming step is not required, and the overlapping metal plate members are strongly bonded.

  As shown in FIG. 1, the right metal plate 3 is supported by the lower bonding die 8, and the tip of the left metal plate 2 overlaps the tip of the right metal plate 3. When the upper bonding die 7 is in close contact with the upper clamp 9 and moves downward, a compressive load is applied to the overlapped metal plate 1 placed between the upper bonding die 7 and the lower bonding die 8 in the vertical direction. Is done. Thereby, the overlapped metal plate 1 is pressurized and joined by plastic flow.

  Further, sliding rods 18 are respectively installed on the upper part of the upper clamp 9 and the lower part of the lower clamp 10, and a stopper 17 is provided on the upper or lower part of these sliding rods 18, so that the upper clamps are matched to the thickness of the metal plate 1. 9 and the position of the lower clamp 10 can be adjusted. Further, the sliding rod 18 is elastically supported by the projecting spring 16, and when the joining molds 7 and 8 are separated after the metal plate 1 is joined, the upper clamp 9 and the lower part are lowered by the restoring force of the projecting spring 16. The clamp 10 is configured so as to bounce up and down to discharge excess metal 6 and oxide film debris.

  2A, 2B, and 2C illustrate a process of inserting and stacking metal plates into a bonding mold according to an embodiment of the present invention.

  2A, 2B, and 2C, the left metal plate 2 is forcibly inserted into the joining molds 7 and 8 by the insertion roller 20 from the left trumpet-shaped insertion port 19. In this case, the discharge spring 15 installed in the upper clamp 9 is contracted by the insertion force of the left metal plate 2, and the surface 5 on which the right metal plate 3 is overlapped is cut by the shaving blade 12 of the right shaving mold 11. As a result, the oxide film on the right metal plate 3 is cut, and at the same time, oxide film debris collects in the dust storage space 13 of the shaving mold 11. By the same method, the right metal plate 3 is also forcibly inserted into the joining molds 7 and 8 by the insertion roller 20 from the right trumpet-shaped insertion port 19. In this case, the discharging spring 15 installed in the lower clamp 10 contracts due to the insertion force of the right metal plate 3, and the surface 5 on which the left metal plate 2 overlaps is cut by the shaving blade 12 of the left shaving mold 11. As a result, the oxide film on the left metal plate 2 is cut, and at the same time, oxide film debris collects in the dust storage space 13. In this way, the left metal plate 2 and the right metal plate 3 are overlapped with the oxide film on the overlapping surface 5 removed.

  FIG. 3 shows a process of joining metal plates overlapped by a joining mold by plastic flow according to an embodiment of the present invention.

  As shown in FIG. 3A, the right metal plate 3 is clamped by the lower bonding die 8 and the upper clamp 9 facing the lower bonding die 8 so as not to move to the right side, and the upper bonding die 7 and the lower clamp 10 facing the upper bonding die 7 are prevented. The left metal plate 2 is clamped so as not to move to the left side. Therefore, the metal plate 1 cannot move in the width direction. In this state, the upper joining die 7 is moved downward by the joining cylinder 22 and pressure is applied downward to the surface 5 where the left metal plate 2 and the right metal plate 3 overlap.

  As shown in FIGS. 3B, 3C, and 3D, when the overlapping portions of the left metal plate 2 and the right metal plate 3 are joined by causing plastic flow, excess metal 6 and oxide film debris are pushed out and shaving gold It is discharged into an excess metal storage space 14 provided between the curved surface 12a of the mold 11 and the upper and lower clamps 9,10. Further, when the upper joining die 7 and the upper shaving die 11 and the lower joining die 8 and the lower shaving die 11 are in contact with each other, the joining is completed and the discharge of the excess metal 6 is also completed. Therefore, the removal of the oxide film and the joining of the two metal plates 1 are completed at the same time.

  FIG. 4 is a perspective view of an upper joining mold and a lower clamp connected thereto according to an embodiment of the present invention.

  As shown in FIG. 4, a joining load is applied to the metal plate 1 that is heated and overlapped. The upper joining die 7 is formed in a male shape, and the lower clamp 10 is formed in a female shape surrounding the upper joining die 7. When the upper joining die 7 and the lower clamp 10 are closely engaged, the overlapping position of the metal plate 1 is accurately fixed, and the metal plate 1 is not pushed out in the width direction. Further, the clamp cylinder 21 of the upper joining mold 7 is connected to the lower clamp 10 by a cylinder rod, whereby the metal plate 1 placed between the upper joining mold 7 and the lower clamp 10 is clamped. On the other hand, a plurality of spring insertion holes are formed in the upper part of the lower clamp 10 in the horizontal direction, and a plurality of rods of the shaving mold 11 are inserted into these spring insertion holes. A support portion is formed in the spring insertion hole and supports the discharge spring 15. Therefore, the shaving die 11 can move in the horizontal direction, and the discharging spring 15 inserted into the spring insertion hole gives a restoring force to the shaving die 11.

  FIG. 5 is a perspective view of a lower bonding mold and an upper clamp connected thereto according to an embodiment of the present invention.

  As shown in FIG. 5, a trumpet-shaped insertion opening 19 is formed on each of the left side of the upper bonding die 7 and the right side of the lower bonding die 8. By increasing the height of the trumpet-shaped insertion port 19 toward the outside, the heated metal plate 1 can be easily inserted into the upper bonding mold 7 and the lower bonding mold 8. The upper clamp 9 is formed in a male shape, and the lower joining mold 8 is formed in a female shape surrounding the upper clamp 9. Similar to the upper joining mold 7 and the lower clamp 10, the lower joining mold 8 and the upper clamp 9 are closely engaged to accurately fix the overlapping position of the metal plate 1, and the metal plate 1 is arranged in the width direction. Will not be pushed out. In addition, the clamp cylinder 21 of the lower bonding die 8 is connected to the upper clamp 9 by a cylinder rod, and the metal plate 3 placed between the lower bonding die 8 and the upper clamp 9 is clamped. On the other hand, a plurality of spring insertion holes are formed in the lower direction of the upper clamp 9, and a plurality of rods of the shaving mold 11 are inserted into these spring insertion holes. A support portion is formed in the spring insertion hole and supports the discharge spring 15. Therefore, the shaving mold 11 can move in the horizontal direction, and the discharging spring 15 inserted into the spring insertion hole gives a restoring force to the shaving mold 11.

  As shown in FIGS. 6 and 7, a plurality of rods to be inserted into the spring insertion holes are formed on one side of the shaving mold 11, and a curved surface 12a is formed on the other side. A shaving blade 12 is formed at one end of the curved surface 12a in contact with the metal plate 1 to cut an oxide film on the surface of the metal plate 1. Further, a dust storage space 13 is formed on the surface of the shaving mold 11 in contact with the metal plate material 1. The shaving mold 11 is protruded by the elastic force of the discharging spring 15. In this state, when the metal plate 1 is inserted into the joining dies 7 and 8 and the discharging spring 15 contracts due to the insertion force of the metal plate 1, the surface 5 on which the metal plate 1 overlaps is cut by the shaving blade 12 of the shaving die 11. Then, the oxide film on the overlapping surface 5 is removed. Further, an excess metal storage space 14 is formed between the tip portion 4 of the metal plate 1, the curved surface 12 a of the shaving mold 11, and the upper and lower clamps 9, 10, and the overlapped metal plate 1 is compressed to cause plastic flow. Then, the excess metal 6 and the oxide film debris are pushed into the excess metal storage space 14. Further, when the upper joining die 7 and the lower joining die 8 slide the shaving die 11 in the vertical direction and the joining of the metal plate material 1 is completed, the discharge of the excess metal 6 is completed. When the upper bonding mold 7 and the lower bonding mold 8 are separated, the excess metal 6 and oxide film debris accumulated in the excess metal storage space 14 are discharged by the restoring force of the discharge spring 15.

  As shown in FIGS. 1 and 8, since the upper part of the upper joining mold 7 is extended to above the upper end of the upper clamp 9, the sliding rod 18 connected to the upper end of the upper clamp 9 is connected to the upper joining mold 7. Penetrate the extension. Therefore, when a compressive load is applied to the overlapping metal plate 1 from the upper joining mold 7, the upper joining mold 7 and the upper clamp 9 are brought into close contact with each other, and a plurality of cylinder rods provided at the upper ends of the upper joining mold 7 are attached. The overlapping metal plates 1 are compressed by the connected joining cylinders 22.

  As shown in FIGS. 8 to 10, the upper bonding die 7 is fixed to the upper portion of the support frame 23, and the lower bonding die 8 is fixed to the lower portion of the support frame 23. A wheel 24 is installed at the lower end of the support frame 23. Therefore, the moving subsequent metal plate is inserted into the upper and lower joining dies 7 and 8 from the trumpet-shaped insertion port 19 provided on one side of the upper and lower joining dies 7 and 8, and the upper and lower joining dies. 7 and 8 are pushed, the stopped preceding metal plate material is automatically inserted from the trumpet-shaped insertion port 19 provided on the other side of the upper and lower joining molds 7 and 8. Thereafter, the succeeding / preceding metal plate 1 moves together with the upper and lower joining molds 7 and 8 at the same speed, and the succeeding / preceding metal plate 1 is joined.

  As described above, according to the present invention, even when the metal plate 1 is too thick to be welded, the metal plate 1 is pressed with a strong bonding pressure and bonded by plastic flow. Therefore, the metal plate material 1 is firmly joined. Moreover, since the removal of the oxide film on the surface 5 on which the metal plate 1 overlaps and the joining of the metal plate 1 can be performed at the same time, there is no need to provide an additional step for removing the oxide film. Therefore, productivity is improved. Then, since the moving metal plate 1 is inserted into the bonding dies 7 and 8 from the trumpet-shaped insertion port 19 of the bonding dies 7 and 8 and placed at an accurate bonding position, the metal plate 1 can be easily joined. It can be done quickly. Moreover, the metal plate material in movement can be joined by attaching a wheel to the lower end of the joining mold. Therefore, continuous joining is also possible.

  Although the present invention has been described above in connection with embodiments that are considered practical at this stage, the present invention is not limited to the disclosed embodiments, but rather is within the spirit and scope of the appended claims. It should be understood that it is intended to cover the various modifications and equivalent configurations involved.

  Throughout this specification and the claims appended hereto, the word “comprise” and its various uses, such as “comprises” and “comprising”, are not explicitly stated to the contrary. It is to be understood that the stated components are included to the extent that they are included and not all other components are excluded.

Sectional drawing of the joining metal mold | die by one Embodiment of this invention. Drawing of the process in which a metal plate material is inserted and overlapped in a joining mold according to an embodiment of the present invention. Drawing of the process in which a metal plate material is inserted and overlapped in a joining mold according to an embodiment of the present invention. Drawing of the process in which a metal plate material is inserted and overlapped in a joining mold according to an embodiment of the present invention. 1 is a diagram illustrating a process of joining metal sheets overlapped in a joining mold by a plastic flow according to an embodiment of the present invention. Drawing of the process of joining the metal plate material which overlapped in the joining metal mold by plastic flow by one embodiment of the present invention. Drawing of the process of joining the metal plate material which overlapped in the joining metal mold by plastic flow by one embodiment of the present invention. Drawing of the process of joining the metal plate material which overlapped in the joining metal mold by plastic flow by one embodiment of the present invention. 1 is a perspective view of an upper joining mold and a lower clamp connected thereto according to an embodiment of the present invention. 1 is a perspective view of a lower bonding mold and an upper clamp connected thereto according to an embodiment of the present invention. 1 is a perspective view of a shaving mold inserted into an upper clamp and a lower clamp according to an embodiment of the present invention. The front view of the shaving blade and dust storage space by one Embodiment of this invention 1 is a front view of an apparatus for thermally joining metal sheets according to an embodiment of the present invention. The side view of the metal-plate-material heat bonding apparatus with a wheel by one Embodiment of this invention. The perspective view of the metal plate heat bonding apparatus with a wheel by one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Metal plate material 2 Left side metal plate material 3 Right side metal plate material 4 Metal plate front-end | tip part 5 Overlapping surface 6 Excess metal 7 Upper joining die 8 Lower joining die 9 Upper clamp 10 Lower clamp 11 Shaving die 12 Shaving blade 12a Curved surface 13 Dust storage space 14 Excess metal storage space 15 Discharge spring 16 Extrusion spring 17 Stopper 18 Sliding rod 19 Trumpet-shaped insertion port 20 Insertion roller 21 Clamp cylinder 22 Joining cylinder 23 Support frame 24 Wheel 25 Hydraulic tank 26 Hydraulic pump 27 Heater insertion space

Claims (12)

A metal plate heat bonding apparatus for applying pressure to overlapping metal plate materials to thermally bond metal plate materials, including the following:
Support frame;
An upper joining mold installed on the upper part of the support frame and provided with a clamp cylinder for clamping the metal plate;
A lower joining mold installed at a lower part of the support frame and provided with a clamp cylinder for clamping a metal plate;
A shaving mold formed with a shaving blade for cutting and removing the surface of the metal plate;
A lower clamp which is installed corresponding to the upper joining mold and slidably inserts the shaving mold; and is installed corresponding to the lower joining mold and moves the shaving mold horizontally. Inserted upper clamp.   The apparatus according to claim 1, wherein the clamp cylinders of the upper and lower joining molds are respectively connected to the lower and upper clamps by cylinder rods.   The upper joining mold and the upper clamp are formed in a male shape, and the lower clamp and the lower joining mold are formed in a female shape surrounding the upper joining mold and the upper clamp, respectively. The apparatus of claim 1, wherein the lower joining mold and the upper clamp are each closely engaged.   A plurality of rods are formed on one side of the shaving mold, and a plurality of spring insertion holes for inserting the rods are horizontally drilled in the lower part of the upper clamp and the upper part of the lower clamp, The apparatus according to claim 1, wherein a support portion for supporting the discharge spring is formed.   The apparatus according to claim 4, wherein the shaving mold has a curved surface opposite to the one side on which the rod is formed.   The apparatus according to claim 1, wherein a dust storage space is formed on a surface of the shaving mold that contacts the metal plate.   The trumpet-shaped insertion opening for inserting a metal plate material is formed on the left and right sides of the upper and lower joining molds and the lower and upper clamps, and the height of each inlet portion increases toward the outside. apparatus.   A sliding rod is installed at the upper end of the upper clamp and the lower end of the lower clamp, and a stopper is provided at the lower end or upper end of each sliding rod, so that the position of the upper and lower clamps can be adjusted according to the thickness of the metal plate material. The apparatus of claim 1.   The apparatus according to claim 8, wherein the sliding rod is elastically supported by a protruding spring.   The apparatus according to claim 8, wherein an upper part of the upper joining mold is extended above the upper clamp, and a sliding rod connected to an upper end of the upper clamp passes through the extension part.   The apparatus according to claim 1, wherein a wheel is installed at a lower end of the support frame. A method of thermally joining metal plate materials by applying pressure to the overlapping metal plate materials, wherein the metal plate materials are overlapped by a shaving blade that cuts the overlapping metal plate materials at the same time as inserting the metal plate materials into a joining mold for joining the stacked metal plate materials removing the oxide film on the surface, how you join the metal plate by applying pressure to the overlapped metal sheet.

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