CN110695480B

CN110695480B - Welding machine for copper sheet winding and bus post base of high-power transformer

Info

Publication number: CN110695480B
Application number: CN201911184913.2A
Authority: CN
Inventors: 刘国保; 张山岭; 李振华; 周玉虎
Original assignee: Chenzhou Yuhui Electronic Technology Co ltd
Current assignee: Chenzhou Yuhui Electronic Technology Co ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2022-01-21
Anticipated expiration: 2039-11-27
Also published as: CN110695480A

Abstract

The invention relates to a welding machine for a copper sheet winding and a bus post foot of a high-power transformer, which comprises a rack, a high-power transformer assembly jig and a tin furnace, wherein the rack is provided with a plurality of welding heads; two lifting screw rods are vertically arranged on two sides of the frame, and the two lifting screw rods are synchronously driven by a lifting driving motor; every lifting screw rod is sleeved with a thread clamping and mounting block, and a high-power transformer assembly jig is mounted on the two thread clamping and mounting blocks. The welding device can realize the welding of the large-power high-frequency transformer which is assembled by the magnetic core, the copper sheet winding and the busbar pin and is not fixed, and can improve the production efficiency and the quality.

Description

Welding machine for copper sheet winding and bus post base of high-power transformer

Technical Field

The invention relates to the field of high-frequency transformer manufacturing equipment, in particular to a welding machine for a copper sheet winding and a bus post foot of a high-power transformer.

Background

At present, a high-power high-frequency transformer is manufactured, a copper sheet winding of the high-power high-frequency transformer needs to be welded with a bus post foot, and the problem that the bus post foot is not fixed easily due to the fact that the copper sheet winding of the high-power high-frequency transformer dissipates heat quickly. At present, the welding is manually carried out by using an eddy-current heating intelligent lead-free welding table, only one high-power high-frequency transformer product can be welded at one time, the efficiency of welding the high-power high-frequency transformer product is about 30 sets/hour, and the efficiency is low; the length of the busbar is difficult to control, and the problem of different lead-out pin lengths exists; the copper sheet winding sheet has fast heat dissipation during welding, and the problems of cold welding and false welding are easily caused due to fast reduction of soldering temperature; the reject ratio of the high-power high-frequency transformer product is up to 10-15%.

In 2019, year 07, 09 days, the chinese utility model discloses an automatic soldering tin machine is disclosed in utility model publication No. CN209077985U, including the tin stove, be provided with frame, mounting panel and clamp directly over the tin stove and get the device, install lift driving motor in the frame, be provided with the lift lead screw that receives lift driving motor drive under the frame, the bottom cover of lift lead screw is equipped with the installation bearing, the mounting panel is fixed on the installation bearing, be provided with on the mounting panel and hold the through-hole that lift lead screw passed, the mounting panel through two guide pillars with the clamp is got the device and is connected, the clamp is got the device and is used for pressing from both sides and gets small-size transformer, the lift lead screw is used for driving the clamp gets the small-size transformer that the device pressed from both sides and gets and immerses the tin stove, accomplishes automatic soldering tin. Although the automatic soldering machine can realize the automatic soldering of the small-sized transformer which is integrally fixed, the soldering cannot be carried out on the high-power high-frequency transformer which is assembled by the magnetic core, the copper sheet winding and the bus post foot and is not fixed.

Disclosure of Invention

In order to solve the above problems: the efficiency problem of manually welding the copper sheet winding and the busbar pin of the high-power high-frequency transformer is solved, and the high defective product rate caused by the temperature drop problem during welding is solved. The invention provides a welding machine for a copper sheet winding and a bus post pin of a high-power transformer, which can realize the welding of the high-power high-frequency transformer which is assembled with a magnetic core, the copper sheet winding and the bus post pin and is not fixed, and can improve the production efficiency and the quality of the high-power high-frequency transformer.

The technical means of the invention is as follows: a welding machine for a copper sheet winding and a bus post pin of a high-power transformer comprises a rack, a high-power transformer assembly jig and a tin furnace; two lifting screw rods are vertically arranged on two sides of the frame, and the two lifting screw rods are synchronously driven by a lifting driving motor; each lifting screw rod is sleeved with a thread clamping and mounting block, two ends of the high-power transformer assembly jig are respectively clamped and fixed on the two thread clamping and mounting blocks, and the tin furnace is positioned right below the high-power transformer assembly jig; when the lifting screw rod is driven to rotate by the lifting driving motor in a clockwise or anticlockwise direction synchronously, the high-power transformer assembly jig can do descending tin immersion or lifting motion relative to the soldering tin liquid level of the tin furnace; the high-power transformer assembly jig comprises an upper pressing plate, a hinge and a lower die holder, wherein the upper pressing plate and the lower die holder are hard metal strips, and the left ends of the upper pressing plate and the lower die holder are connected through the hinge, so that the upper pressing plate can rotate to open and press the lower die holder; the right end is provided with a quick pressing mechanism; the upper pressing plate and the lower die holder are quickly and reliably pressed; a lower die plate provided with a plurality of magnetic core pit positions is arranged on the lower die base, a magnet piece is embedded in the center of each magnetic core pit position, and a bus column pin positioning insertion hole is formed in one side, corresponding to each magnetic core pit position, of the lower die base; when the magnetic core is placed in the magnetic core pit position and the copper sheet winding is stacked, and the bus post foot is arranged in the bus post foot positioning insertion hole, the magnetic core is adsorbed and positioned by the magnet sheet in the center of the magnetic core pit position, and the pin hole of the copper sheet winding is just sleeved on the bus post foot; the upper pressure plate is arranged on the surface pressing towards the pit positions of the magnetic cores, and glass pressure beads are arranged at the copper sheet winding positions corresponding to the pit positions of the magnetic cores; the rapid pressing mechanism consists of a lower die base barb and a movable upper hook; the hook body part of the lower die holder barb is in a cuboid block shape, the lower end of the cuboid block is fixed at the right end of the lower die holder, the hook part of the lower die holder barb is arranged at the upper end of the cuboid block and extends inwards, and the hook end of the lower die holder barb is provided with a guide inclined plane; the hook body part of the movable upper hook is also in a cuboid block shape, the upper middle part of the movable upper hook is provided with a sliding hole, the hook part is arranged at the lower end of the cuboid block, the hook extends outwards, and the hook end is provided with a collision inclined plane; the sliding hole of the movable upper hook is arranged between the open slots at the right end part of the upper pressure plate through the sliding rod and the return spring, and a pushing rod acting on the movable upper hook is also arranged outside the open slots; under the action of the guide inclined plane of the barb of the lower die holder or the action of the pushing rod, the movable upper hook can overcome the elasticity of the return spring to move back and forth along the sliding rod, so that the quick pressing mechanism can quickly and reliably press or quickly release the upper pressing plate and the lower die holder.

The invention has the beneficial effects that: the automatic tin soldering device can realize the automatic tin soldering of the large-power high-frequency transformer which is assembled on the magnetic core, the copper sheet winding and the busbar pin and is not fixed, has a simple structure, reduces the labor cost, improves the production efficiency and the product qualification rate, and increases the economic benefit.

Drawings

The embodiments of the invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic front view of the jig for high power transformer assembly shown in fig. 1.

Fig. 3 is a right-view structural diagram of fig. 2.

Fig. 4 is a schematic diagram of a partial cross-sectional top view of the copper sheet winding, magnetic core and bus post leg assembly of fig. 2.

Fig. 5 is a schematic top view of the fully opened state of fig. 2.

In the drawings: 1, a frame; 2, a jig for the high-power transformer assembly; 3, a tin furnace; 4, lifting a screw rod; 5, lifting a driving motor; 6, clamping the mounting block by threads; 7, pressing the upper plate; 8, a hinge; 9, a lower template; 10, a lower die holder; 11 magnetic core pit positions; 12 magnet pieces; 13 a confluence post pin positioning jack; 14 a busbar foot; 15 magnetic cores; 16 copper sheet windings; 17 pressing beads on glass; 18 lower die holder barb; 19, movably hooking; 20 sliding rods; 21 a return spring; 22 a push rod; 23 the sensor is lifted.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to specific embodiments.

Referring to the attached figure 1, the welding machine for the copper sheet winding and the bus post foot of the high-power transformer comprises a rack 1, a high-power transformer assembly jig 2 and a tin furnace 3; two lifting screw rods 4 vertically arranged on two sides are arranged on the frame 1, and the two lifting screw rods 4 are synchronously driven by a lifting driving motor 5; each lifting screw rod 4 is sleeved with a thread clamping and mounting block 6, two ends of the high-power transformer assembly jig 2 are respectively clamped and fixed on the two thread clamping and mounting blocks 6, and the tin furnace 3 is positioned right below the high-power transformer assembly jig 2; when the lifting screw rod 4 is driven to rotate by the lifting driving motor 5 in a clockwise or anticlockwise direction synchronously, the high-power transformer assembly jig 2 can do descending tin immersion or lifting motion relative to the soldering tin liquid level of the tin furnace 3;

referring to fig. 2, the high-power transformer assembly jig 2 comprises an upper pressing plate 7, a hinge 8 and a lower die holder 10, wherein the upper pressing plate 7 and the lower die holder 10 are hard metal strips, and the left ends of the upper pressing plate 7 and the lower die holder 10 are connected through the hinge 8, so that the upper pressing plate 7 can rotate relative to the lower die holder 10 to be opened and pressed; the right end is provided with a quick pressing mechanism; the upper pressing plate 7 and the lower die holder 10 are pressed together quickly and reliably;

referring to fig. 4-5, a lower die plate 9 provided with a plurality of magnetic core pits 11 is disposed on the lower die base 10, a magnet piece 12 is embedded in the center of each magnetic core pit 11, and a bus-bar pin positioning insertion hole 13 is formed in each magnetic core pit 11 at a position corresponding to one side of the lower die base 10; when a magnetic core 15 and a copper sheet winding 16 are stacked in the magnetic core pit 11 and the bus post pin 14 is mounted in the bus post pin positioning insertion hole 13, the magnetic core 15 is adsorbed and positioned by the magnet sheet 12 in the center of the magnetic core pit 11, and the pin hole of the copper sheet winding 16 is just sleeved on the bus post pin 14; the upper pressure plate 7 is pressed to the surface of each magnetic core pit 11, and glass pressure beads 17 are arranged at the positions of the copper sheet windings 16 corresponding to the magnetic core pits 11;

referring to fig. 3, the quick pressing mechanism is composed of a lower die base barb 18 and a movable upper hook 19; the hook part of the lower die holder barb 18 is in a cuboid block shape, the lower end of the cuboid block is fixed at the right end of the lower die holder 10, namely the right end relative to the attached drawing 2, the hook part of the lower die holder barb 18 is arranged at the upper end of the cuboid block, the hook extends inwards, namely the inward direction relative to the attached drawing 2, and the hook end of the lower die holder barb 18 is provided with a guide inclined plane; the hook body part of the movable upper hook 19 is also in a cuboid block shape, the upper middle part is provided with a sliding hole, the hook part is arranged at the lower end of the cuboid block, the hook extends outwards, namely the hook end is provided with a collision inclined plane relative to the outside of the attached figure 2; the slide hole of the movable upper hook 19 is arranged between the open slots at the right end part of the upper pressure plate 7 through a slide rod 20 and a return spring 21, and a push rod 22 acting on the movable upper hook 19 is also arranged outside the open slots; under the action of the guiding inclined plane of the barb 18 of the lower die holder or the action of the pushing rod 22, the movable upper hook 19 can move back and forth along the sliding rod 20 against the elastic force of the return spring 21, so that the quick pressing mechanism can quickly and reliably press or quickly release the upper pressing plate 7 and the lower die holder 10.

Further, be equipped with the tin scraping plate on tin stove 3, the tin scraping plate is used for scraping away from the soldering tin oxide layer of 3 soldering tin liquid levels of tin stove.

Furthermore, the two threaded clamping and mounting blocks 6 are respectively provided with a lifting detection rod, and the lifting detection rod is provided with a lifting sensor 23, such as an electrical contact probe or a limit switch.

On the jig 2 for the high-power transformer assembly, the bus post feet 14 can be placed in the bus post foot positioning insertion holes 13 and oppositely connected with the copper sheet windings 16 in the magnetic core pit 11; and brushing soldering flux on a welding position of the jig which is stacked with the copper sheet winding 16, the magnetic core 15 and the busbar pin 14, and then respectively clamping and fixing two ends of the high-power transformer assembly jig 2 on the two threaded clamping and mounting blocks 6 above the tin furnace 3 for tinning. During tin plating, the tin soldering liquid level is detected by using the lifting sensor 23, and the start and stop of the lifting driving motor 5 can be controlled by the generated electric signal through an electric trigger control circuit known in the field; the descending and tin immersion depth of the high-power transformer assembly jig 2 is controlled; the working efficiency can be improved by using the invention, namely, the working efficiency is increased to 200 sets/hour by 30 sets/hour in the prior art.

The high-power transformer assembly jig 2 adopts the technical scheme that glass pressing beads 17 are arranged at the positions of copper sheet windings 16 of all magnetic core pit positions 11; in addition, because the magnetic core 15, the copper sheet winding 16 and the bus post foot 14 are placed on the jig 2 of the high-power transformer assembly, the upper end and the lower end of the product are fixed, and the reject ratio of the product is reduced to 0.03%.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A welding machine for a copper sheet winding and a bus post foot of a high-power transformer comprises a rack (1), a high-power transformer assembly jig (2) and a tin furnace (3); the method is characterized in that: two lifting screw rods (4) vertically arranged on two sides are arranged on the rack (1), and the two lifting screw rods (4) are synchronously driven by a lifting driving motor (5); each lifting screw rod (4) is sleeved with a thread clamping and mounting block (6), two ends of the high-power transformer assembly jig (2) are respectively clamped on the two thread clamping and mounting blocks (6), and the tin furnace (3) is positioned right below the high-power transformer assembly jig (2); when the lifting screw rod (4) is driven to rotate clockwise or anticlockwise synchronously by the lifting driving motor (5), the high-power transformer assembly jig (2) can do descending tin immersion or lifting motion relative to the soldering tin liquid level of the tin furnace (3); the high-power transformer assembly jig (2) comprises an upper pressing plate (7), a hinge (8) and a lower die holder (10), wherein the upper pressing plate (7) and the lower die holder (10) are hard metal strips, and the left ends of the upper pressing plate (7) and the lower die holder (10) are connected through the hinge (8), so that the upper pressing plate (7) can rotate to open and press relative to the lower die holder (10); the right end of the pressing device is provided with a quick pressing mechanism, so that the upper pressing plate (7) and the lower die holder (10) can be quickly and reliably pressed; a lower template (9) provided with a plurality of magnetic core pits (11) is arranged on the lower die base (10), a magnet piece (12) is embedded in the center of each magnetic core pit (11), and a bus pin positioning jack (13) is arranged at one side of the lower die base (10) corresponding to each magnetic core pit (11); when a magnetic core (15) and a copper sheet winding (16) are stacked in the magnetic core pit (11), and a bus post pin (14) is mounted in the bus post pin positioning insertion hole (13), the magnetic core (15) is adsorbed and positioned by a magnet sheet (12) in the center of the magnetic core pit (11), and a pin hole of the copper sheet winding (16) is just sleeved on the bus post pin (14); the upper pressure plate (7) is pressed to the surface of each magnetic core pit (11) and is provided with a glass pressing bead (17) at the position of the copper sheet winding (16) corresponding to each magnetic core pit (11); the rapid pressing mechanism consists of a lower die base barb (18) and a movable upper hook (19); the hook body part of the lower die holder barb (18) is in a cuboid block shape, the lower end of the cuboid block is fixed at the right end of the lower die holder (10), the hook part of the lower die holder barb (18) is arranged at the upper end of the cuboid block and extends inwards, and the hook end of the lower die holder barb (18) is provided with a guide inclined plane; the hook body part of the movable upper hook (19) is also in a cuboid block shape, the upper middle part is provided with a sliding hole, the hook part is arranged at the lower end of the cuboid block, the hook extends outwards, and the hook end is provided with a collision inclined plane; the slide hole of the movable upper hook (19) is arranged between the open grooves at the right end part of the upper pressure plate (7) through a slide rod (20) and a return spring (21), and a pushing rod (22) acting on the movable upper hook (19) is arranged outside the open grooves; under the action of a guide inclined plane of a barb (18) of the lower die holder or under the action of a push rod (22), the movable upper hook (19) can move back and forth along the sliding rod (20) against the elasticity of a return spring (21), so that the quick pressing mechanism can quickly and reliably press or quickly release the upper pressing plate (7) and the lower die holder (10);

a tin scraping plate is arranged on the tin furnace (3) and used for scraping a tin soldering oxide layer away from the tin soldering liquid surface of the tin furnace (3); and the two thread clamping and mounting blocks (6) are respectively provided with a lifting detection rod, and the lifting detection rod is provided with a lifting sensor (23).