Thin and thick copper bar lap-joint brazed coil assembly and equipment

Abstract

The utility model discloses a thin and thick copper bar lap-joint brazing coil assembly and equipment. The thin and thick copper bar lap-joint brazing coil assembly comprises a coil used for heating a metal piece and a metal shell used for containing the coil. The coil comprises a thick coil used for heating a thick metal piece, a thin coil used for heating a thin metal piece, a coil base used for fixing the coil and a connecting coil used for connection. The metal shell comprises an outer shell on the outermost layer, a first insulating seat and a second insulating seat which are fixed in the outer shell, and a first magnetism gathering seat and a second magnetism gathering seat which are respectively arranged in the first insulating seat and the second insulating seat, and an insulating side seat for fixing a coil base is also arranged on the outer wall of the outer shell. According to the thin and thick copper bar lap joint brazing coil assembly and equipment, operation is easy and convenient, the workpiece heating temperature is uniform, and the brazing welding quality is stable and reliable; braze welding can be successful by one-time induction heating of a workpiece, and the production efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding, and particularly relates to a lap brazing coil assembly and equipment for thin and thick copper bars. Background Art

[0002] Brazing is a metal connection process method, which is widely used in various industrial fields, including electronics, automotive, aerospace, new energy industries, etc. In the prior art, the electromagnetic induction principle is often used to generate heat to heat the brazing filler metal and the workpiece. The principle is as follows: an alternating current is passed through a coil to generate an alternating magnetic field. When this magnetic field acts on the metal material, an induced current will be generated, and then heat will be generated to heat the brazing filler metal and the workpiece.

[0003] In the new energy industry, due to the need for current transmission, there are often instances where multiple layers of thin copper bars are brazed and at the same time brazed with a thick copper bar. The specific situation is as Figure 1 shown. When brazing at that time, due to the different thicknesses of the thin metal part 5 and the thick metal part 4, their heating rates are also different, so the temperatures of the two cannot reach the brazing temperature required at the same time. As a result, the multiple layers of thin metal parts 5 reach the welding temperature while the thick metal part 4 does not reach the brazing temperature, resulting in the inability to braze the thin metal part 5 and the thick metal part 4 together. At the same time, since the workpieces to be brazed need to be kept flat and there should be no warping or deformation, pressure needs to be applied during welding. In the prior art, the method of first performing induction heating brazing on multiple layers of thin metal parts and then performing induction heating brazing on the thick metal part and the thin metal parts is used to solve the technical problem of different heating rates, but this will increase the production time and directly result in low production efficiency. Summary of the Utility Model

[0004] In order to overcome the uneven welding caused when welding workpieces with a large difference in thickness in the prior art, the following technical solutions are provided:

[0005] A lap brazing coil assembly for thin and thick copper bars includes: a coil for heating the metal part and a metal shell for accommodating the coil;

[0006] The coil includes: a thick coil for heating the thick metal part, a thin coil for heating the thin metal part, a coil base for fixing the coil, and a connecting coil for connecting the thin coil with the coil base and connecting the thick coil with the thin coil;

[0007] The metal shell includes: an outer shell on the outermost layer, a first insulating seat and a second insulating seat fixed inside the outer shell, and a first magnetic concentrating seat and a second magnetic concentrating seat respectively arranged inside the first insulating seat and the second insulating seat. An insulating side seat for fixing the coil base is also arranged on the outer wall of the outer shell;

[0008] The first insulating seat and the second insulating seat are fixed in the housing by fixing members. The first magnetic focusing seat and the second magnetic focusing seat are respectively fixed to the lower surfaces of the first insulating seat and the second insulating seat by fixing members. The coil base passes through the housing through an insulating side seat.

[0009] Furthermore, the thick coil, the thin coil, the coil base and the connecting coil are integrally formed. The thick coil and the thin coil are both in the shape of horizontal strips, and the plane where the thick coil is located is higher than the plane where the thin coil is located.

[0010] The connecting coil includes a front connecting coil connecting the coil base and the thin coil and a rear connecting coil connecting the thick coil and the thin coil. The coil base includes a front base connected to the front connecting coil, a rear base connected to the thick coil, and a base insulating plate disposed between the front base and the rear base.

[0011] Furthermore, the rear base includes a base L-shaped connecting member connected to the thick coil and fixed outer edges disposed on both outer edges of the long section of the base L-shaped connecting member. The front base has the same structure as the rear base. The base insulating plate corresponds to the outer shape of the coil base and is fixed between the front base and the rear base by fixing members.

[0012] Furthermore, the front connecting coil includes: a coil L-shaped connecting member, a connecting coil horizontal section connecting the coil L-shaped connecting member and the base L-shaped connecting member, and a connecting coil vertical section connecting the coil L-shaped connecting member and the thin coil. The coil L-shaped connecting member is disposed on the right side of the thin coil and is on the same horizontal plane as the thick coil. Its long section is parallel to the axis of the thin coil, and its short section is perpendicular to the axis of the thin coil.

[0013] The connecting coil horizontal section horizontally connects the front end of the long section of the coil L-shaped connecting member and the lower end of the short section of the base L-shaped connecting member. The connecting coil vertical section vertically connects the left end of the short section of the coil L-shaped connecting member and the front end of the thin coil. The rear connecting coil connects the rear end of the thick coil and the rear end of the thin coil in the same way.

[0014] Furthermore, a first cavity for accommodating the thick coil and a second cavity for the thin coil are formed in the housing. The first insulating seat and the second insulating seat are respectively fixed in the first cavity and the second cavity by fixing members. A rectangular groove is also formed on the side of the housing. The insulating side seat is correspondingly installed on the side wall of the housing by fixing members and covers the rectangular groove. A side seat through hole is formed in the middle of the insulating side seat for the base L-shaped connecting member to pass through.

[0015] The first insulating base is generally cuboid-shaped, and a first installation groove is penetratingly opened on its lower surface along its length direction. The width of the first installation groove is greater than the width of the first magnetic concentrating base. Except that the length of the second insulating base is less than that of the first insulating base, other structures are the same as those of the first insulating base.

[0016] Furthermore, the first magnetic concentrating base is also generally cuboid-shaped, and it includes a first magnetic concentrating strip disposed on the surface of the first installation groove and two end insulating plates disposed on the front and rear end faces of the first magnetic concentrating strip; the end insulating plates are fixed to the front and rear end faces of the first insulating base through fixing members;

[0017] Along the length direction of the first magnetic concentrating strip, a first magnetic concentrating groove is opened on its lower surface, and the first magnetic concentrating groove is opposite to the thick coil. Except that the length of the second magnetic concentrating base is less than that of the first magnetic concentrating base, other structures are the same as those of the first magnetic concentrating base.

[0018] Furthermore, a plurality of insulating baffles are also disposed in the housing 25 for realizing electrical insulation; refractory cement is filled in the first cavity and the second cavity, so as to fix the insulating baffles in the first cavity and the second cavity. A cooling water channel is also disposed in the housing for cooling the coil, and a cooling water pipe is disposed on the housing for the inlet and outlet of cooling water.

[0019] Furthermore, the difference between the ratio of the facing area of the first magnetic concentrating base and the thick coil and the ratio of the facing area of the second magnetic concentrating base and the thin coil and the ratio of the thickness between the thick metal piece and the thin metal piece is less than 1.

[0020] A thin and thick copper busbar lap brazing device includes: a pressure frame, a cylinder disposed above the top surface of the pressure frame, a moving plate disposed in the pressure frame, and a thin and thick copper busbar lap brazing assembly disposed under the moving plate. A workpiece clamping assembly is also fixed in front of the thin and thick copper busbar lap brazing assembly; under the thin and thick copper busbar lap brazing assembly, a thick metal piece is disposed corresponding to the position of the thick coil, and a thin metal piece is disposed corresponding to the position under the thin coil. The workpiece clamping assembly clamps a metal plate.

[0021] The thin and thick copper busbar lap brazing coil assembly and device of the present utility model are simple and convenient to operate, the heating temperature of the workpiece is uniform, and the brazing welding quality is stable and reliable; the workpiece can be successfully brazed by induction heating once, and the production efficiency is high. Description of the Drawings

[0022] Figure 1 It is a welding schematic diagram of the thin metal piece and the thick metal piece.

[0023] Figure 2 It is an assembly drawing of the coil and the metal shell in the thin and thick copper busbar lap brazing coil assembly of the present utility model.

[0024] Figure 3 This is an explosion diagram of the metal shell in the lap brazing coil assembly of thick and thin copper bars of the present utility model.

[0025] Figure 4 This is an explosion diagram of the coil in the lap brazing coil assembly of thick and thin copper bars of the present utility model.

[0026] Figure 5 This is an explosion diagram of the metal shell in the lap brazing coil assembly of thick and thin copper bars of the present utility model from another angle.

[0027] Figure 6 This is a bottom view of the lap brazing coil assembly of thick and thin copper bars of the present utility model.

[0028] Figure 7 This is a three-dimensional structural diagram of the lap brazing equipment for thick and thin copper bars of the present utility model.

[0029] Figure 8 This is a sectional view of the lap brazing equipment for thick and thin copper bars of the present utility model.

[0030] In the figure:

[0031] 1 - Coil, 2 - Metal shell, 4 - Thick metal part, 5 - Thin metal part, 6 - Metal plate;

[0032] 11 - Thick coil, 12 - Thin coil, 13 - Coil base, 14 - Connecting coil;

[0033] 21 - First insulating seat, 22 - Second insulating seat, 23 - First magnetic concentrating seat, 24 - Second magnetic concentrating seat, 25 - Outer shell, 26 - Insulating side seat, 27 - Insulating baffle;

[0034] 131 - Front base, 132 - Rear base, 133 - Base insulating plate, 141 - Front connecting coil, 142 - Rear connecting coil;

[0035] 132a - Base L-shaped connecting piece, 132b - Fixed outer edge, 141a - Coil L-shaped connecting piece, 141b - Horizontal section of connecting coil, 141c - Vertical section of connecting coil;

[0036] 211 - First installation groove, 231 - First magnetic concentrating strip, 232 - End insulating plate, 233 - First magnetic concentrating groove; 251 - First cavity, 252 - Second cavity, 253 - Rectangular groove, 254 - Cooling water pipe, 261 - Side seat through hole;

[0037] 300 - Pressure frame, 301 - Cylinder, 302 - Moving plate, 303 - Lap brazing assembly for thick and thin copper bars, 304 - Workpiece clamping assembly. Specific embodiments

[0038] The technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in specific embodiments. It should be understood that the described embodiments are only used to illustrate the present utility model, rather than to limit the scope of the present utility model.

[0039] Embodiment 1:

[0040] According to Figure 2 As shown, a lap brazing coil assembly of thick and thin copper bars includes: a coil 1 for heating metal parts and a metal shell 2 for accommodating the coil 1;

[0041] The coil 1 includes: a thick coil 11 for heating thick metal parts, a thin coil 12 for heating thin metal parts, a coil base 13 for fixing the coil, and a connecting coil 14 for connecting the thin coil 12 to the coil base 13 and connecting the thick coil 11 to the thin coil 12;

[0042] Combined with Figure 2 and Figure 3 , the metal shell 2 includes: an outer shell 25 on the outermost layer, a first insulating seat 21 and a second insulating seat 22 fixed inside the outer shell 25, and a first magnetic concentrating seat 23 and a second magnetic concentrating seat 24 respectively arranged inside the first insulating seat 21 and the second insulating seat 22. An insulating side seat 26 for fixing the coil base 13 is also arranged on the outer wall of the outer shell 25;

[0043] The first insulating seat 21 and the second insulating seat 22 are fixed inside the outer shell 25 through fixing parts. The first magnetic concentrating seat 23 and the second magnetic concentrating seat 24 are respectively fixed on the lower surfaces of the first insulating seat 21 and the second insulating seat 22 through fixing parts. The coil base 13 passes through the outer shell 25 through the insulating side seat 26.

[0044] Furthermore, combined with Figure 2 and Figure 4 , the thick coil 11, the thin coil 12, the coil base 13 and the connecting coil 14 are integrally formed. The thick coil 11 and the thin coil 12 are both horizontally arranged strip-shaped bodies, and the plane where the thick coil 11 is located is higher than the plane where the thin coil 12 is located;

[0045] The connecting coil 14 includes a front connecting coil 141 connecting the coil base 13 and the thin coil 12 and a rear connecting coil 142 connecting the thick coil 11 and the thin coil 12; the coil base 13 includes a front base 131 connected to the front connecting coil 141, a rear base 132 connected to the thick coil 11, and a base insulating plate 133 arranged between the front base 131 and the rear base 132.

[0046] Further, the rear base 132 includes a base L-shaped connecting member 132a connected to the thick coil 11 and fixed outer edges 132b provided on both outer edges of the long section of the base L-shaped connecting member 132a; the front base 131 has the same structure as the rear base 132, which will not be described in detail. The base insulating plate 133 corresponds to the outer shape of the coil base 13 and is fixed between the front base 131 and the rear base 132 by fixing members.

[0047] Further, the front connecting coil 141 includes: a coil L-shaped connecting member 141a, a connecting coil horizontal section 141b connecting the coil L-shaped connecting member 141a and the base L-shaped connecting member 132a, and a connecting coil vertical section 141c connecting the coil L-shaped connecting member 141a and the thin coil 12. The coil L-shaped connecting member 141a is provided on the right side of the thin coil 12 and is on the same horizontal plane as the thick coil 11. Its long section is arranged parallel to the axis of the thin coil 12, and its short section is arranged perpendicular to the axis of the thin coil 12.

[0048] The connecting coil horizontal section 141b horizontally connects the front end of the long section of the coil L-shaped connecting member 141a and the lower end of the short section of the base L-shaped connecting member 132a; the connecting coil vertical section 141c vertically connects the left end of the short section of the coil L-shaped connecting member 141a and the front end of the thin coil 12; the rear connecting coil 142 connects the rear end of the thick coil 11 and the rear end of the thin coil 11 in the same way, which will not be described in detail.

[0049] Further, in combination with Figure 3 and Figure 5 , a first cavity 251 for accommodating the thick coil 11 and a second cavity 252 for the thin coil 12 are provided in the housing 25. The first insulating seat 21 and the second insulating seat 22 are respectively fixed in the first cavity 251 and the second cavity 252 by fixing members, such as screws. A rectangular groove 253 is also provided on the side of the housing 25. The insulating side seat 26 is correspondingly installed on the side wall of the housing 25 by fixing members, such as screws, and covers the rectangular groove 253. A side seat through hole 261 is provided in the middle of the insulating side seat 26 for the base L-shaped connecting member 132a to pass through.

[0050] The first insulating seat 21 is generally rectangular parallelepiped-shaped, and a first installation groove 211 is provided through the lower surface along its length direction. The width of the first installation groove 211 is greater than the width of the first magnetic concentrating seat 23. The second insulating seat 22 has the same structure as the first insulating seat 21 except that its length is less than that of the first insulating seat 21.

[0051] Further, the first magnetic focusing seat 23 is also substantially rectangular parallelepiped-shaped, and includes a first magnetic focusing strip 231 disposed on the surface of the first mounting groove 211 and two end insulating plates 232 disposed on the front and rear end faces of the first magnetic focusing strip 231; the end insulating plates 232 are fixed to the front and rear end faces of the first insulating seat 211 by fixing members;

[0052] Along the length direction of the first magnetic focusing strip 231, a first magnetic focusing groove 233 is formed on its lower surface, and the first magnetic focusing groove 233 faces the thick coil 11. The second magnetic focusing seat 24 has the same structure as the first magnetic focusing seat 23 except that its length is less than that of the first magnetic focusing seat 23;

[0053] Further, in combination with Figure 5 and Figure 6 , a plurality of insulating baffles 27 are further disposed in the housing 25 for achieving electrical insulation;

[0054] The first cavity 251 and the second cavity 252 are filled with refractory cement (not shown in the figure), so as to fix the insulating baffles 27 in the first cavity 251 and the second cavity 252.

[0055] Further, the ratio of the facing area between the first magnetic focusing seat 23 and the thick coil 11 to the facing area between the second magnetic focusing seat 24 and the thin coil 12 minus the ratio of the thickness between the thick metal part and the thin metal part is less than 1.

[0056] Further, a cooling water channel (not shown in the figure) is also provided in the housing 25 for cooling the coil 1, and a cooling water pipe 254 is provided on the housing 25 for inlet and outlet of cooling water.

[0057] Embodiment 2:

[0058] A thick and thin copper bar lap brazing device includes the thick and thin copper bar lap brazing coil assembly described in Embodiment 1. As Figure 7 shown, it includes: a pressure frame 300, a cylinder 301 disposed above the top surface of the pressure frame 300, a moving plate 302 disposed in the pressure frame 301, and a thick and thin copper bar lap brazing assembly 303 disposed under the moving plate 302. A workpiece clamping assembly 304 is further fixed in front of the thick and thin copper bar lap brazing assembly 303;

[0059] In combination with Figure 7 and Figure 8 , under the thick and thin copper bar lap brazing assembly 303, a thick metal part 4 is disposed corresponding to the position of the thick coil 11, and a thin metal part 5 is disposed corresponding to the position under the thin coil 12. The workpiece clamping assembly 304 clamps a metal plate 6.

[0060] When the utility model is in use, the cylinder 301 drives the moving plate 302 and the thick and thin copper busbar lap brazing coil assembly 303 to move downward onto the thick metal part 4 and the thin metal part 5. The thick coil 11 and the thin coil 12 in the thick and thin copper busbar lap brazing assembly 303 heat the thick metal part 4 and the thin metal part 5 respectively. Since the difference between the ratio of the facing area of the first magnetic concentrating seat 23 and the thick coil 11 and the ratio of the facing area of the second magnetic concentrating seat 24 and the thin coil 12 and the ratio of the thickness between the thick metal part 4 and the thin metal part 5 is less than 1, the heating rates of the two are the same, and uniform welding can be achieved.

[0061] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A thin and thick copper bar overlap brazing coil assembly, characterized in that: include: A coil for heating a metal part and a metal housing for containing the coil; The coil comprises: a thick coil for heating a thick metal piece, a thin coil for heating a thin metal piece, a coil base for fixing the coil, and a connecting coil for connecting the thin coil with the coil base and connecting the thick coil with the thin coil; The metal shell comprises: an outermost shell, a first insulating seat and a second insulating seat fixed in the shell, and a first magnetic focusing seat and a second magnetic focusing seat respectively arranged in the first insulating seat and the second insulating seat, and an insulating side seat for fixing the coil base is also arranged on the outer wall of the shell; The first insulating seat and the second insulating seat are fixed in the shell through fixing parts, the first magnetic focusing seat and the second magnetic focusing seat are respectively fixed to the lower surfaces of the first insulating seat and the second insulating seat through fixing parts, and the coil base is passed through the shell through the insulating side seat.

2. The thin and thick copper bar overlap brazing coil assembly according to claim 1 is characterized in that: The thick coil, thin coil, coil base and connecting coil are integrally formed, the thick coil and thin coil are both horizontally arranged long strips, and the plane where the thick coil is located is higher than the plane where the thin coil is located; The connecting coil includes a front connecting coil connecting the coil base and the thin coil and a rear connecting coil connecting the thick coil and the thin coil; the coil base includes a front base connected to the front connecting coil, a rear base connected to the thick coil and a base insulating plate arranged between the front base and the rear base.

3. The thin and thick copper bar overlap brazing coil assembly according to claim 2, characterized in that: The rear base includes an L-shaped base connector connected to the thick coil and fixed outer edges arranged on the outer edges of both sides of the long section of the base L-shaped connector; the front base has the same structure as the rear base, the base insulating plate corresponds to the shape of the coil base, and is fixed between the front base and the rear base by a fixing member.

4. The thin and thick copper bar overlap brazing coil assembly according to claim 3, characterized in that: The front connecting coil comprises: a coil L-shaped connecting piece, a connecting coil horizontal section connecting the coil L-shaped connecting piece and the base L-shaped connecting piece, and a connecting coil vertical section connecting the coil L-shaped connecting piece and the thin coil, wherein the coil L-shaped connecting piece is arranged on the right side of the thin coil and is located in the same horizontal plane as the thick coil, wherein the long section thereof is arranged parallel to the axis of the thin coil, and the short section thereof is arranged perpendicular to the axis of the thin coil; The horizontal section of the connecting coil horizontally connects the front end of the long section of the coil L-shaped connector and the lower end of the short section of the base L-shaped connector; the vertical section of the connecting coil vertically connects the left end of the short section of the coil L-shaped connector and the front end of the thin coil; the rear connecting coil connects the rear ends of the thick coil and the thin coil in the same way.

5. The thin and thick copper bar overlap brazing coil assembly according to claim 3, characterized in that: The shell is provided with a first cavity for accommodating a thick coil and a second cavity for accommodating a thin coil, and the first insulating seat and the second insulating seat are respectively fixed in the first cavity and the second cavity by fixing parts; a rectangular groove is also provided on the side of the shell, and the insulating side seat is correspondingly mounted on the side wall of the shell by fixing parts and covers the rectangular groove; a side seat through hole is provided in the middle of the insulating side seat for the base L-shaped connector to pass through; The first insulating seat is roughly rectangular in shape, and a first mounting groove is opened on its lower surface along its length direction. The width of the first mounting groove is greater than the width of the first magnetic concentrating seat. The second insulating seat is the same as the first insulating seat in structure except that the length is smaller than the first insulating seat.

6. The thin and thick copper bar overlap brazing coil assembly according to claim 5, characterized in that: The first magnetic concentrator is also roughly in the shape of a cuboid, and comprises a first magnetic concentrator strip disposed on the surface of the first mounting groove and two end insulating plates disposed on the front and rear end surfaces of the first magnetic concentrator strip; the end insulating plates are fixed to the front and rear end surfaces of the first insulating seat by fixing members; Along the length direction of the first magnetic concentrating strip, a first magnetic concentrating groove is opened on its lower surface, and the first magnetic concentrating groove faces the thick coil. Except that the second magnetic concentrating seat is shorter than the first magnetic concentrating seat, the other structures are the same as the first magnetic concentrating seat.

7. The thin and thick copper bar overlap brazing coil assembly according to claim 5, characterized in that: A plurality of insulating baffles are also provided in the shell for achieving electrical insulation; the first cavity and the second cavity are filled with refractory cement to fix the insulating baffles in the first cavity and the second cavity; a cooling water circuit is also provided in the shell for cooling the coil; a cooling water pipe is provided on the shell for the inlet and outlet of cooling water.

8. The thin and thick copper bar overlap brazing coil assembly according to claim 1, characterized in that: The difference between the ratio of the facing area of ​​the first magnetic concentrator and the thick coil to the facing area of ​​the second magnetic concentrator and the thin coil and the ratio of the thickness of the thick metal part to the thin metal part is less than 1.

9. A thin and thick copper bar overlap brazing device, comprising the thin and thick copper bar overlap brazing coil assembly as claimed in claim 1, characterized in that: include: A pressure frame, a cylinder arranged on the top surface of the pressure frame, a movable plate arranged in the pressure frame, and a thin and thick copper bar overlap brazing assembly arranged under the movable plate, wherein a workpiece clamping assembly is also fixed in front of the thin and thick copper bar overlap brazing assembly; under the thin and thick copper bar overlap brazing assembly, a thick metal part is arranged at the position corresponding to the thick coil, and a thin metal part is arranged under the thin coil, and the workpiece clamping assembly clamps the metal plate.

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