A system and method for preparing a flat rectangular solder sheet

Abstract

The embodiment of the present invention discloses a system and method for preparing a flat rectangular solder sheet, including a pushing mechanism, a heating device, a rectangular hole mold and a shearing mechanism arranged in sequence from left to right, wherein the heating device is provided with a feed port for placing a tin column into the softened state on the side of the pushing mechanism, the rectangular hole mold is fixed on the heating device, and a discharge port is provided on the side of the shearing mechanism on the rectangular hole mold, the discharge port and the feed port are connected, the pushing mechanism includes an extrusion shaft for pressing the tin column from the heating device to the rectangular hole mold, wherein a feeding mechanism for guiding the formed rectangular tin solder wire to the shearing mechanism is also provided between the heating device and the shearing mechanism. The present invention improves the uneven appearance of the solder sheet caused by the existing production method by heating the tin material to the softened stage, and extruding and forming it with a pushing mechanism and a rectangular hole mold, and combining the shearing mechanism with the automatic cutting and jointing production, thereby improving the stability of the placement of the components during the production of the SMT equipment.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of solder wire forming, and in particular to a system and method for preparing a flat rectangular solder sheet. Background Art

[0002] Solder sheet is a tin sheet used for welding. In the existing production technology and equipment, the production of solder sheet mainly adopts mold casting and stamping. However, no matter whether casting or stamping is used, there is a defect that the solder sheet cannot be formed into a complete plane. Summary of the invention

[0003] To this end, an embodiment of the present invention provides a system and method for preparing a flat rectangular solder sheet to solve the problem that the solder sheet prepared in the prior art cannot achieve a complete plane.

[0004] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0005] According to a first aspect of an embodiment of the present invention, a system for preparing a flat rectangular solder sheet comprises a pushing mechanism, a heating device, a rectangular hole mold and a shearing mechanism arranged in sequence from left to right, wherein the heating device is provided with a feed port on the pushing mechanism side for placing a tin column into the softened state, the rectangular hole mold is fixed on the heating device, and a discharge port is provided on the rectangular hole mold on the shearing mechanism side, the discharge port is connected to the feed port, the pushing mechanism comprises an extrusion shaft for pressing the tin column from the heating device to the rectangular hole mold, wherein a feeding mechanism for guiding the formed rectangular tin solder wire to the shearing mechanism is also provided between the heating device and the shearing mechanism.

[0006] Furthermore, the flat rectangular solder sheet preparation system also includes a workbench and a shearing table, the pushing mechanism and the heating device are both installed on the workbench, the feeding mechanism and the shearing mechanism are both installed on the shearing table, and an electromechanical control box is provided to respectively link the pushing mechanism, the heating device, the feeding mechanism and the shearing mechanism, wherein the table top of the workbench is horizontally arranged, and the table top of the shearing table is vertically arranged.

[0007] Furthermore, the pushing mechanism also includes a left support plate and a right support plate which are arranged in parallel, and the left support plate and the right support plate are respectively vertically fixed on the table surface of the workbench, and assembly holes are respectively opened in the middle of the plate surface of the left support plate and the right support plate, the extrusion shaft is movably inserted into the assembly hole of the left support plate, and the extrusion end of the extrusion shaft faces the right support plate, the heating device is installed in the assembly hole of the right support plate, and the feed port of the heating device is arranged coaxially with the extrusion shaft, wherein the extrusion shaft is electrically controlled to perform linear motion from left to right.

[0008] Furthermore, a movable plate arranged in parallel is provided between the left support plate and the right support plate, the movable plate is connected to the electrical system, a locking hole is opened in the middle of the movable plate, and the extrusion end of the extrusion shaft passes through the movable plate along the locking hole and is fixed, and parallel guide shafts are respectively provided on both sides of the extrusion shaft, the left end of the guide shaft is fixedly connected to the left support plate, the right end of the guide shaft is fixedly connected to the right support plate, and the movable plate is slidably connected to the guide shaft.

[0009] Furthermore, the shearing mechanism includes a support block and a shearing knife, the support block is fixedly connected to the table top of the shearing table, and a feed groove is horizontally provided in the support block for horizontally feeding the solder wire from left to right, the shearing knife is installed on the right side of the support block through electric control, and the movement direction of the shearing knife is vertical, so that after the shearing knife is running, it is flat against the right side of the support block and faces the solder wire to cut according to length, wherein the shearing knife is a single-edged cutting knife.

[0010] Furthermore, the feeding mechanism includes an active roller and a driven roller, and the active roller and the driven roller are both vertically installed on the table surface of the shearing table, and a gap is formed between the active roller and the driven roller for feeding the solder wire horizontally to the shearing mechanism, wherein the active roller is connected to a servo motor drive.

[0011] Furthermore, a tension wheel is provided between the rectangular hole mold and the feeding mechanism. The tension wheel is rotatably connected to the table top of the shearing table and is located on the upper side of the feeding mechanism. The solder wire pressed out through the rectangular hole mold passes around the tension wheel and is fed to the feeding mechanism. A tension sensor is installed on the tension wheel, and the tension sensor is electrically connected to the electromechanical control box.

[0012] Furthermore, at least two tension wheels are provided.

[0013] Furthermore, a guide mechanism is arranged between the tension wheel and the feeding mechanism, and the guide mechanism includes a guide wheel and a guide block. The guide wheel is rotatably connected to the table top of the shearing table, and the guide wheel is located below the tension wheel. After the solder wire passes through the tension wheel and bypasses the guide wheel, it is horizontally advanced to the feeding mechanism. The guide block is installed on the table top of the shearing table, and a guide groove for horizontally feeding the solder wire from left to right is horizontally arranged in the guide block, wherein a group of guide blocks are respectively arranged between the feeding mechanism and the guide wheel, and between the feeding mechanism and the shearing mechanism.

[0014] According to a second aspect of an embodiment of the present invention, a preparation method is provided, using a flat rectangular solder sheet preparation system according to this embodiment, the preparation method comprising:

[0015] Step S1, putting a cylindrical tin alloy into a heating device from a feed inlet, and starting the heating device to soften the tin column;

[0016] Step S2, starting the pushing mechanism, controlling the extrusion shaft to push toward the tin column, so that the softened tin column is pressed into the rectangular hole mold for forming, until the formed solder wire is pressed out from the discharge port of the rectangular hole mold and naturally cooled;

[0017] Step S3, the formed solder is passed around the tension wheel and the guide wheel in sequence, and is advanced to the shearing mechanism through the feeding mechanism, and then the servo motor and the shearing knife are started to operate, thereby completing the continuous shearing preparation of the solder sheet.

[0018] The embodiments of the present invention have the following advantages:

[0019] 1. By heating the tin material to the softening stage, and extruding it with a pushing mechanism and a rectangular hole die, and combining it with a shearing mechanism to automatically cut and connect the structure, compared with the production mode of casting through the mold, the generation of oxides when the tin alloy is heated to a liquid state can be reduced;

[0020] 2. By heating the tin material to the softening stage, and extruding it with a pushing mechanism and a rectangular hole die, and combining it with a shearing mechanism to automatically cut and connect the structure, compared with the over-stamping production mode, it can reduce the complex production process of tin plate stamping and the generation of excess waste during stamping;

[0021] 3. By heating the tin material to the softening stage, and extruding it with a pushing mechanism and a rectangular hole die, and combining it with a shearing mechanism to automatically cut and splice the structure for production, the labor demand and work safety incidents during operation are reduced, and the dimensional stability, standardization and consistency of the solder sheet products are improved;

[0022] 4. By heating the tin material to the softening stage, and extruding it with a pushing mechanism and a rectangular hole mold, and combining it with a shearing mechanism to automatically cut and connect the production structure, the uneven appearance (arc; deformation) of the solder sheet caused by the existing production method (mold pouring, stamping) is improved, and the placement stability of the SMT equipment during production is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0025] Figure 1 A front view of a system for preparing a flat rectangular solder sheet provided by an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the three-dimensional structure of a flat rectangular solder sheet preparation system provided by an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the structure of a shearing table of a system for preparing a flat rectangular solder sheet provided in an embodiment of the present invention.

[0028] In the figure: 1. pushing mechanism; 11. extrusion shaft; 12. left support plate; 13. right support plate; 14. movable plate; 15. guide shaft; 2. heating device; 3. rectangular hole mold; 4. shearing mechanism; 41. support block; 42. shearing knife; 5. feeding mechanism; 51. active roller; 52. driven roller; 6. workbench; 7. shearing table; 71. tension wheel; 8. electromechanical control box; 9. guide mechanism; 91. guide wheel; 92. guide block. DETAILED DESCRIPTION

[0029] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example

[0031] like Figure 1 and Figure 2As shown, the present invention provides a system for preparing a flat rectangular solder sheet, comprising a pushing mechanism 1, a heating device 2, a rectangular hole mold 3 and a shearing mechanism 4 arranged in sequence from left to right. A feed port for placing a tin column into the softening is provided on the side of the pushing mechanism 1 on the heating device 2. The rectangular hole mold 3 is fixed on the heating device 2, and a discharge port is provided on the side of the shearing mechanism 4 on the rectangular hole mold 3, and the discharge port is connected to the feed port. The pushing mechanism 1 includes an extrusion shaft 11 for pressing the tin column from the heating device 2 to the rectangular hole mold 3. A feeding mechanism 5 for guiding the formed rectangular tin solder wire to the shearing mechanism 4 is also provided between the heating device 2 and the shearing mechanism 4. Thus, the tin material is heated to the softening stage by the heating device 2, and extruded and formed by the pushing mechanism 1 and the rectangular hole mold 3, and the shearing machine 4 is combined to automatically cut and splice the structure for production.

[0032] As described above, the flat rectangular solder sheet preparation system further includes a workbench 6 and a shearing table 7. The pushing mechanism 1 and the heating device 2 are both mounted on the workbench 6, the feeding mechanism 5 and the shearing mechanism 4 are both mounted on the shearing table 7, and an electromechanical control box 8 is provided to respectively link the pushing mechanism 1, the heating device 2, the feeding mechanism 5 and the shearing mechanism 4. Among them, the table top of the workbench 6 is horizontally arranged, and the table top of the shearing table 7 is vertically arranged.

[0033] The pushing mechanism 1 also includes a left support plate 12 and a right support plate 13 which are arranged in parallel. The left support plate 12 and the right support plate 13 are respectively fixed vertically on the table surface of the workbench 6, and assembly holes are respectively opened in the middle of the plate surface of the left support plate 12 and the right support plate 13. The extrusion shaft 11 is movably inserted into the assembly hole of the left support plate 12, and the extrusion end of the extrusion shaft 11 faces the right support plate 13. The heating device 2 is installed in the assembly hole of the right support plate 13, and the feed port of the heating device 2 is arranged coaxially with the extrusion shaft 11. Among them, the heating device 2 can be any conventional technical means well known to those skilled in the art, for example: the shell of the heating device 2 is a hollow columnar structure, and a high-temperature heating wire is arranged in the shell. The cylindrical tin alloy is put into the heating device 2 from the feed port to be softened, and the softened tin column is pressed into the rectangular hole mold 3 by the extrusion shaft 11 of the pushing mechanism 1 to be formed, until the formed solder wire is pressed out from the discharge port of the rectangular hole mold 3 and naturally cooled. In addition, the extrusion shaft 11 is electrically controlled to perform linear motion from left to right. Specifically, a movable plate 14 is provided between the left support plate 12 and the right support plate 13, and the movable plate 14 is connected to the electrical system of the electromechanical control box 8. A locking hole is provided in the middle of the movable plate 14, and the extrusion end of the extrusion shaft 11 passes through the movable plate 14 along the locking hole and is fixed. Guide shafts 15 are provided in parallel on both sides of the extrusion shaft 11, and the left end of the guide shaft 15 is fixed to the left support plate 12, and the right end of the guide shaft 15 is fixed to the right support plate 13, so that the movable plate 14 is slidably connected to the guide shaft 15. Thus, the setting of the two guide shafts 15 ensures the stable movement of the extrusion shaft 11.

[0034] Combination Figure 3 As shown, the shearing mechanism 4 includes a support block 41 and a shearing knife 42. The support block 41 is fixedly connected to the table of the shearing table 7, and a feeding groove for feeding the solder wire horizontally from left to right is horizontally provided in the support block 41. The shearing knife 42 is installed on the right side of the support block 41 through electric control, and the movement direction of the shearing knife 42 is the vertical direction, so that the shearing knife 42 is flat against the right side of the support block 41 after operation to cut the solder wire according to the length. Among them, the shearing knife 42 is a single-edged cutter. In addition, the feeding mechanism 5 includes an active roller 51 and a driven roller 52. The active roller 51 and the driven roller 52 are both vertically installed on the table of the shearing table 7, and a gap is formed between the active roller 51 and the driven roller 52 for feeding the solder wire horizontally to the shearing mechanism 4. Among them, a servo motor drive is connected to the active roller 51. By using the servo motor drive, the feeding mechanism 5 can control the length of the formed solder wire that is progressively fed to the shearing mechanism 4, so as to prepare solder sheets in batches through the shearing mechanism 4.

[0035] As described above, a tension wheel 71 is provided between the rectangular hole mold 3 and the feeding mechanism 5. The tension wheel 71 is rotatably connected to the table surface of the shearing table 7 and is located on the upper side of the feeding mechanism 5, so that the solder wire pressed out of the rectangular hole mold 3 passes around the tension wheel 71 and is progressively fed to the feeding mechanism 5. Among them, a tension sensor is installed on the tension wheel 71, and the tension sensor is electrically connected to the electromechanical control box 8. The tension of the solder wire on the tension wheel 71 is detected and sensed by the tension sensor, and the sensing signal is fed back to the electromechanical control box 8, so that the electromechanical control box 8 controls and adjusts the pushing force control of the extrusion shaft 11 of the pushing mechanism 1 to avoid the scattering of the formed solder wire. Preferably, at least two tension wheels 71 are provided, and the two tension wheels 71 are distributed in the vertical direction, so that the formed solder wire passes around multiple tension wheels 71 and is gradually reduced to one side of the feeding mechanism 5. A guide mechanism 9 is also provided between the tension wheel 71 and the feeding mechanism 5. The guide mechanism 9 includes a guide wheel 91 and a guide block 92. The guide wheel 91 is rotatably connected to the table of the shearing table 7, and the guide wheel 91 is located below the tension wheel 71, so that the solder wire passing through the tension wheel 71 bypasses the guide wheel 91 and is horizontally advanced to the feeding mechanism 5. The guide block 92 is installed on the table of the shearing table 7 by locking screws, and a guide groove for horizontally feeding the solder wire from left to right is horizontally provided in the guide block 92. Among them, a set of guide blocks 92 are respectively provided between the feeding mechanism 5 and the guide wheel 91, and between the feeding mechanism 5 and the shearing mechanism 4, to ensure the stability of the horizontal advancement of the formed solder wire and prevent it from being scattered.

[0036] Another embodiment is: the present invention provides a preparation method, using the flat rectangular solder sheet preparation system of this embodiment, the preparation method comprises:

[0037] Step S1, putting the cylindrical tin alloy into the heating device 2 from the feeding port, and starting the heating device 2 to soften the tin column;

[0038] Step S2, start the pushing mechanism 1, control the extrusion shaft 11 to push the tin column, so that the softened tin column is pressed into the rectangular hole mold 3 for forming, until the formed solder wire is pressed out from the discharge port of the rectangular hole mold 3 and naturally cooled;

[0039] Step S3, the formed solder is passed around the tension wheel 71 and the guide wheel 91 in sequence, and is advanced to the shearing mechanism 4 through the feeding mechanism 5, and then the servo motor and the shearing knife 42 are started to operate, thereby completing the continuous shearing preparation of the solder sheet.

[0040] The embodiments of the present invention have the following advantages:

[0041] 1. By heating the tin material to a softened stage, and extruding it with a pushing mechanism 1 and a rectangular hole die 3, and combining it with a shearing mechanism 4 to automatically cut and connect the structure for production, compared with the production mode of casting through a mold, the generation of oxides when the tin alloy is reheated to a liquid state can be reduced;

[0042] 2. By heating the tin material to a softened stage, and extruding it with a pushing mechanism 1 and a rectangular hole die 3, and combining it with a shearing machine 4 for automatic cutting and splicing, compared with the over-stamping production mode, the complex production process of tin plate stamping and the generation of excess waste during stamping can be reduced;

[0043] 3. By heating the tin material to the softening stage, and extruding it with the pushing mechanism 1 and the rectangular hole die 3, and combining it with the shearing machine 4 to automatically cut and splice the production, the personnel requirements and work safety incidents during the operation are reduced, and the dimensional stability, standardization and consistency of the solder sheet products are improved;

[0044] 4. By heating the tin material to a softened stage, and extruding it with a pushing mechanism 1 and a rectangular hole mold 3, and combining it with a shearing machine 4 for automatic cutting and splicing production, the uneven appearance of the solder sheet caused by the existing production method (mold casting, stamping molding) is improved (arc; deformation), and the placement stability of the SMT equipment during production is improved (flat appearance, reducing the misjudgment of the SMT equipment image recognition; flat appearance, reducing the leakage and throwing of the SMT equipment nozzle that cannot fit flatly).

[0045] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A flat rectangular solder sheet preparation system, characterized by: The flat rectangular solder sheet preparation system comprises a pushing mechanism, a heating device, a rectangular hole mold and a shearing mechanism which are arranged in sequence from left to right. The heating device is provided with a feed port for placing the tin column into the softening at the side of the pushing mechanism. The rectangular hole mold is fixed on the heating device, and a discharge port is provided on the rectangular hole mold at the side of the shearing mechanism. The discharge port is connected to the feed port. The pushing mechanism comprises an extrusion shaft for pressing the tin column from the heating device to the rectangular hole mold. A feeding mechanism for guiding the formed rectangular solder wire to the shearing mechanism is also provided between the heating device and the shearing mechanism. The flat rectangular solder sheet preparation system also includes a workbench and a shearing table, the pushing mechanism and the heating device are both installed on the workbench, the feeding mechanism and the shearing mechanism are both installed on the shearing table, and an electromechanical control box is provided to respectively link the pushing mechanism, the heating device, the feeding mechanism and the shearing mechanism, wherein the table top of the workbench is horizontally arranged, and the table top of the shearing table is vertically arranged; The shearing mechanism comprises a support block and a shearing knife, wherein the support block is fixedly connected to the table surface of the shearing table, and a feeding slot for feeding the solder wire horizontally from left to right is transversely arranged in the support block, and the shearing knife is installed on the right side of the support block through electric control, and the movement direction of the shearing knife is a vertical direction, so that the shearing knife is flat against the right side of the support block after operation to face the solder wire and shear according to the length, wherein the shearing knife is a single-edged cutting knife; The feeding mechanism comprises an active roller and a driven roller, both of which are vertically mounted on the table of the shearing table, and a gap is formed between the active roller and the driven roller for feeding the solder wire horizontally to the shearing mechanism, wherein the active roller is connected to a servo motor drive; A tension wheel is provided between the rectangular hole mold and the feeding mechanism, the tension wheel is rotatably connected to the table surface of the shearing table and is located on the upper side of the feeding mechanism, and the solder wire pressed out of the rectangular hole mold passes around the tension wheel and is fed to the feeding mechanism, wherein a tension sensor is installed on the tension wheel, and the tension sensor is connected to the electromechanical control box for electrical signals; At least two tension wheels are provided; A guide mechanism is arranged between the tension wheel and the feeding mechanism, and the guide mechanism includes a guide wheel and a guide block. The guide wheel is rotatably connected to the table top of the shearing table, and the guide wheel is located below the tension wheel. After the solder wire passes through the tension wheel and bypasses the guide wheel, it is horizontally advanced to the feeding mechanism. The guide block is installed on the table top of the shearing table, and a guide groove for horizontally feeding the solder wire from left to right is horizontally arranged in the guide block, wherein a group of guide blocks are respectively arranged between the feeding mechanism and the guide wheel, and between the feeding mechanism and the shearing mechanism.

2. A flat rectangular solder sheet preparation system according to claim 1, characterized in that: The pushing mechanism also includes a left support plate and a right support plate which are arranged in parallel. The left support plate and the right support plate are respectively vertically fixed on the table surface of the workbench, and assembly holes are respectively opened in the middle of the plate surface of the left support plate and the right support plate. The extrusion shaft is movably inserted into the assembly hole of the left support plate, and the extrusion end of the extrusion shaft faces the right support plate. The heating device is installed in the assembly hole of the right support plate, and the feed port of the heating device is arranged coaxially with the extrusion shaft, wherein the extrusion shaft is electrically controlled to perform linear motion from left to right.

3. A flat rectangular solder sheet preparation system according to claim 2, characterized in that: A parallel movable plate is provided between the left support plate and the right support plate, and the movable plate is connected to the electrical system of the electromechanical control box. A locking hole is opened in the middle of the movable plate, and the extrusion end of the extrusion shaft passes through the movable plate along the locking hole and is fixed. Parallel guide shafts are respectively provided on both sides of the extrusion shaft, the left end of the guide shaft is fixedly connected to the left support plate, and the right end of the guide shaft is fixedly connected to the right support plate, and the movable plate is slidably connected to the guide shaft.

4. A method for preparing a flat rectangular solder sheet, using a system for preparing a flat rectangular solder sheet according to any one of claims 1 to 3, characterized in that: The preparation method comprises: Step S1, placing a cylindrical tin column into a heating device from a feed port, and starting the heating device to soften the tin column; Step S2, starting the pushing mechanism, controlling the extrusion shaft to push toward the tin column, so that the softened tin column is pressed into the rectangular hole mold for forming, until the formed solder wire is pressed out from the discharge port of the rectangular hole mold and naturally cooled; Step S3, the formed solder wire is passed around the tension wheel and the guide wheel in sequence, and is advanced to the shearing mechanism through the feeding mechanism, and then the servo motor and the shearing knife are started to operate, thereby completing the continuous shearing preparation of the solder sheet.

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