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CN-121972751-A - Welding device for metallized film capacitor

CN121972751ACN 121972751 ACN121972751 ACN 121972751ACN-121972751-A

Abstract

The invention discloses a welding device for a metallized film capacitor, which relates to the technical field of welding devices and comprises a base, a bracket, a plasma welding machine and a welding head, wherein a movable end of an electric push rod is fixedly connected with a mounting box, exhaust fans are symmetrically arranged on the inner bottom surface of the mounting box, a filtering mechanism is arranged in the mounting box, a cleaning mechanism is arranged in the mounting box, a connecting shaft is fixedly connected on an output shaft of a servo motor, and a transfer mechanism is arranged at one end of the connecting shaft, which is positioned outside the base.

Inventors

  • JIA CHAOHUI
  • JIA DONGMEI
  • Shu Qifu
  • ZHANG YIXI

Assignees

  • 铜陵洪宇电子科技有限公司

Dates

Publication Date
20260505
Application Date
20260304

Claims (10)

  1. 1. Welding device for metallized film capacitors, comprising a base (1), a support (2), a plasma welder (3) and a welding head (5), characterized in that it further comprises: The electric push rod (20), the electric push rod (20) is installed inside the support (2), the movable end of the electric push rod (20) is fixedly connected with the installation box (4) through the installation frame, the exhaust fans (14) are symmetrically installed on the inner bottom surface of the installation box (4), a filtering mechanism for filtering welding smoke is arranged in the installation box (4), and a cleaning mechanism for cleaning the filtering mechanism is arranged in the installation box; The servo motor (12) is arranged on the inner bottom surface of the base (1), a connecting shaft (9) is fixedly connected to an output shaft of the servo motor (12), the top of the connecting shaft (9) movably penetrates through the outside of the base (1), and a transfer mechanism for a metallized film capacitor to be welded is arranged at one end of the connecting shaft (9) positioned outside the base (1); The air cooling mechanism is arranged on the top surface of the base (1) and used for cooling the welded workpiece.
  2. 2. The welding device for the metallized film capacitor according to claim 1, wherein the transfer mechanism comprises a round box (11) rotatably arranged on the outer wall of the connecting shaft (9), the round box (11) is fixedly connected with the base (1), a round block (6) is rotatably arranged in the round box (11), and the round block (6) is fixedly connected with the connecting shaft (9) and synchronously rotates along with the connecting shaft (9); a plurality of circular grooves (27) are uniformly formed in the top surface of the circular block (6) along the circumferential direction, and a preheating component for preheating workpieces to be welded is arranged in each circular groove (27).
  3. 3. The welding device for the metallized film capacitor according to claim 2, wherein the preheating component comprises an annular ring (29) fixedly connected in a circular groove (27), an annular plate (32) is fixedly connected on the outer wall of the annular ring (29), a preheating cavity is formed in the upper area of the annular plate (32), a gas return cavity is formed in the lower area of the annular plate (32), and the gas return cavity and the preheating cavity are mutually communicated through a circular hole (28) formed in the annular plate (32); an air inlet hole (31) is formed in the outer wall of the preheating cavity, and an air outlet hole (33) is formed in the inner bottom surface of the air return cavity; The top of the installation box (4) is communicated with an air duct (10), and one end, far away from the installation box (4), of the air duct (10) is communicated with the inside of the circular box (11).
  4. 4. A welding device for metallized film capacitors according to claim 3, wherein the inner wall of the annular ring (29) is fixedly connected with a plurality of elastic fixing plates (30) uniformly along the circumferential direction.
  5. 5. The welding device for the metallized film capacitor according to claim 4, wherein the air cooling mechanism comprises a rectangular box (8) arranged on the top surface of the base (1), a miniature electric push rod (26) is arranged in the rectangular box (8), an air outlet head (7) is fixedly connected to the movable end of the miniature electric push rod (26), a connecting pipe (13) is arranged on the bottom surface of the air outlet head (7) in a communicating manner, and one end, far away from the air outlet head (7), of the connecting pipe (13) movably penetrates through the base (1) and is communicated with the inner bottom surface of the round box (11).
  6. 6. Welding device for metallized film capacitors according to claim 1, characterized in that the filter means comprise a filter screen (17) arranged horizontally in the mounting box (4), the mounting box (4) above the filter screen (17) being provided with activated carbon (15).
  7. 7. The welding device for the metallized film capacitor according to claim 6, wherein the cleaning mechanism comprises guide rods (24) symmetrically fixedly connected below the filter screen (17), broom (18) are slidably arranged between the guide rods (24), bristles of the broom (18) are attached to the bottom surface of the filter screen (17), and a section of the guide rods (24) between the broom (18) and the inner wall of the installation box (4) is sleeved with a reset spring (25); the bottom surface of the broom (18) is provided with a collecting assembly, and one side of the broom (18) is provided with a driving assembly.
  8. 8. The welding device for the metallized film capacitor according to claim 7, wherein the driving component comprises an electromagnet II (22) fixedly connected to the side surface of the broom (18), and an electromagnet I (21) matched with the electromagnet II (22) is fixedly connected to the inner side surface of the mounting box (4); After the electromagnet I (21) and the electromagnet II (22) are electrified, the magnetism of the opposite end faces is opposite; An electric control (16) is further arranged on the inner bottom surface of the installation box (4).
  9. 9. The welding device for the metallized film capacitor according to claim 8, wherein the electric control member (16) comprises a rectangular block (1601) fixedly connected to the inner bottom surface of the mounting box (4), and a countersink and a rectangular groove communicated with the countersink are integrally formed in the rectangular block (1601); The counter sink is provided with a sealing plate (1602) in a sliding mode, the sealing plate (1602) is fixedly connected with a connecting rod (1605), one end, far away from the sealing plate (1602), of the connecting rod (1605) is movably penetrated into the rectangular groove, a second conductive block (1606) is fixedly connected into the rectangular groove, the second conductive block (1606) is in sliding fit with the inner wall of the rectangular groove, a first conductive block (1603) matched with the second conductive block (1606) is arranged in the rectangular groove, and an extrusion spring (1604) is sleeved on a section, located in the counter sink, of the connecting rod (1605); The first electromagnet (21), the second electromagnet (22), the first conductive block (1603) and the second conductive block (1606) are connected in series through wires to form a power supply loop.
  10. 10. A welding device for metallized film capacitors according to claim 9, wherein said collecting assembly comprises a collecting box (19) arranged under a broom (18); The inner bottom surface of the collecting box (19) is fixedly connected with a dovetail mounting block (23), a dovetail groove matched with the dovetail mounting block (23) is formed in the inner bottom surface of the broom (18), and the dovetail mounting block (23) and the dovetail groove are arranged in a sliding mode.

Description

Welding device for metallized film capacitor Technical Field The invention relates to the technical field of welding devices, in particular to a welding device for a metallized film capacitor. Background Metallized film capacitors have been widely used in many core fields such as new energy power generation, power electronics, rail transit, home appliances, etc., by virtue of their excellent electrical insulation properties, high energy density, long service life, and good temperature stability. In the manufacturing process of the metallized film capacitor, the welding procedure of the metal spraying layer, the busbar and the pins is a key link for determining the core performance of the product, the welding quality directly influences the conductivity, the mechanical connection strength, the heat dissipation efficiency and the long-term working reliability of the capacitor, if welding has defects, the problems of overlarge contact resistance, abnormal heating, even open circuit failure and the like of the product are easily caused in the using process, and equipment faults can be possibly caused in serious cases. When the conventional welding device is used for welding a metallized film capacitor, the metallized film capacitor is formed by heat-sensitive materials such as a polymer film, the conventional process is mostly used for directly welding the metallized film capacitor in a normal temperature state, a severe temperature gradient is formed when high-temperature soldering tin is contacted with a low-temperature metallized film capacitor, and as the difference of the thermal expansion coefficients of the polymer film and metal pins is obvious, the thermal stress generated by the temperature shock acts on the internal structure of the capacitor, so that the damage such as film layer cracking, package deformation and internal electrode displacement is easily caused, the insulating property and the structural integrity of the capacitor are seriously affected, and the product percent of pass is reduced. Disclosure of Invention The invention provides a welding device for a metallized film capacitor, which aims to solve the problems in the background technology. In order to achieve the above purpose, the present invention adopts the following technical scheme: a welding device for metallized film capacitors comprising a base, a support, a plasma welder and a welding head, further comprising: The electric push rod is arranged in the bracket, the movable end of the electric push rod is fixedly connected with a mounting box through a mounting frame, exhaust fans are symmetrically arranged on the inner bottom surface of the mounting box, a filtering mechanism for filtering welding smoke is arranged in the mounting box, and a cleaning mechanism for cleaning the filtering mechanism is arranged in the mounting box; the servo motor is arranged on the inner bottom surface of the base, a connecting shaft is fixedly connected to an output shaft of the servo motor, the top of the connecting shaft movably penetrates through the outside of the base, and a transfer mechanism for a metallized film capacitor to be welded is arranged at one end of the connecting shaft, which is positioned outside the base; And the air cooling mechanism is arranged on the top surface of the base and is used for cooling the welded workpiece. Preferably, the transfer mechanism comprises a round box rotationally arranged on the outer wall of the connecting shaft, the round box is fixedly connected with the base, a round block is rotationally arranged in the round box, and the round block is fixedly connected with the connecting shaft and synchronously rotates along with the connecting shaft; the top surface of the circular block is uniformly provided with a plurality of circular grooves along the circumferential direction, and each circular groove is internally provided with a preheating component for preheating a workpiece to be welded. Preferably, the preheating component comprises an annular ring fixedly connected in the circular groove, an annular plate is fixedly connected on the outer wall of the annular ring, a preheating cavity is formed in the upper area of the annular plate, a gas return cavity is formed in the lower area of the annular plate, and the gas return cavity and the preheating cavity are mutually communicated through a circular hole formed in the annular plate; an air inlet hole is formed in the outer wall of the preheating cavity, and an air outlet hole is formed in the inner bottom surface of the air return cavity; the top of the installation box is communicated with an air duct, and one end of the air duct, which is far away from the installation box, is communicated with the inside of the circular box. Preferably, a plurality of elastic fixing plates are uniformly and fixedly connected to the inner wall of the annular ring along the circumferential direction. Preferably, the air cooling mechanism comprises a rectangular