CN112077611B

CN112077611B - Welding assembly line for transformer radiating fins

Info

Publication number: CN112077611B
Application number: CN201910517262.8A
Authority: CN
Inventors: 陈学福; 何升
Original assignee: Fujian Province Nanping City Jianyang District Anshun Transformer Accessories Factory
Current assignee: Fujian Province Nanping City Jianyang District Anshun Transformer Accessories Factory
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2022-05-31
Anticipated expiration: 2039-06-14
Also published as: CN112077611A

Abstract

The invention relates to a welding production line of transformer radiating fins, which comprises a spot welding machine, a flattening machine and a seam welding machine which are sequentially connected together through a conveying line, wherein the flattening machine comprises a front flattening mechanism, a blocking mechanism and a rear flattening mechanism which are sequentially arranged, the front flattening mechanism comprises a front lower clamping roller and a front upper clamping roller, a front correction channel is formed between the front upper clamping roller and the front lower clamping roller, the rear flattening mechanism comprises a rear lower clamping roller and a plurality of rear upper clamping rollers, a rear correction channel is formed between the rear upper clamping roller and the rear lower clamping roller, the blocking structure comprises a blocking rod and a blocking rod lifting mechanism, and avoidance ring grooves for enabling protrusions on the transformer radiating fins to pass through are formed in the front upper clamping roller, the front lower clamping roller, the rear upper clamping roller and the rear lower clamping roller. The invention provides a transformer radiator fin welding production line capable of flattening transformer fins before seam welding, and solves the problems that manual operation is carried out between welding processes, time and labor are wasted, and flattening cannot be carried out before seam welding.

Description

Welding assembly line for transformer radiating fins

Technical Field

The invention relates to equipment for producing transformer accessories, in particular to a welding production line for transformer radiating fins.

Background

The transformer heat sink is a component constituting the transformer. The transformer radiating fin is formed by welding the peripheries of two metal sheets together, the interior of the transformer radiating fin is of a hollow structure, radiating oil inlets and outlets are formed in the two ends of the transformer radiating fin, and the two sides of the radiating oil inlets and outlets along the thickness direction of the transformer radiating fin protrude out of the protrusions of the transformer radiating fin. When the transformer radiator is used, the transformer radiating fins are connected in parallel between the oil inlet pipe and the oil outlet pipe, the oil inlet pipe is welded with one radiating oil inlet and one radiating oil outlet of each transformer radiating fin, and the oil outlet pipe is welded with the other radiating oil inlet and the other radiating oil outlet of each transformer radiating fin, so that the transformer radiator is formed. The existing process for welding the radiating fins of the transformer together comprises the following steps: firstly, cleaning the surfaces of metal sheets needing to be welded, then manually transferring the metal sheets to a spot welding machine, manually overlapping the two metal sheets together, then assisting in transporting the two metal sheets to the spot welding machine for spot welding to weld the two ends provided with oil ports together, manually transferring the spot-welded transformer radiating fins to seam welding to weld the other two ends together, and finally pressing the two ends welded together through cold pressing. And heat dissipation is performed through a fan in the seam welding process. The following defects exist in the heat dissipation production process of the transformer: the manual transfer is labor-consuming and requires a large space for inventory turnover; after the welding surface is cleaned, the welding surface needs to stay for a long time in the middle of spot welding, so that the welding surface is still oxidized and polluted during spot welding, and the electric welding effect is influenced; when seam welding is carried out, the seam welding effect is influenced due to poor flatness of the transformer radiating fins; the blowing mode for heat dissipation has the defect of slow heat dissipation speed.

Disclosure of Invention

The invention aims to provide a transformer radiator fin welding production line capable of flattening transformer fins before seam welding, and solves the problems that manual operation for help transportation between welding processes is time-consuming and labor-consuming, and the transformer radiator fins cannot be flattened before seam welding.

The second purpose of the invention is to further provide a transformer radiator cooling fin welding production line capable of simultaneously cleaning the welding surfaces of two metal sheets to be welded together on line, so as to solve the problem of poor spot welding quality caused by re-oxidation of the cleaning surfaces before spot welding due to pre-cleaning.

The invention further aims to provide a welding production line of the radiating fins of the transformer radiator for water cooling radiation during seam welding, which can recycle cooling water, and solves the problem of low radiating speed of the existing radiating fins of the transformer which are subjected to heat radiation through air cooling during seam welding.

The technical problem is solved by the following technical scheme: a transformer radiating fin welding production line comprises two metal sheets which are overlapped together, wherein the front end and the rear end of each metal sheet are provided with protrusions forming oil ports, the transformer radiating fin welding production line is characterized by comprising a spot welding machine, a flatting machine and a seam welding machine which are sequentially arranged, the feeding end of the spot welding machine is provided with a spot welding machine feeding conveying line, a flatting machine feeding conveying line is arranged between the spot welding machine and the flatting machine, a seam welding machine feeding conveying line is arranged between the flatting machine and the seam welding machine, the flatting machine comprises a flatting machine part rack, a front flattening mechanism, a blocking mechanism and a rear flattening mechanism, the front flattening mechanism comprises a plurality of front lower clamping rods which are positioned on the same plane and are rotationally connected to the flatting machine part rack, and a plurality of front upper clamping rods which are positioned on the same plane and are rotationally connected to the flatting machine part rack, a front flattening channel is formed between the front upper clamping rods and the front lower clamping rods, mechanism flattens after includes that a plurality of rotations that are located on the same plane are connected the back in the quick-witted portion frame is down centre gripping rod and a plurality of rotations that are located on the same plane are connected the centre gripping rod is gone up to the back in the quick-witted portion frame, and the back is gone up and is formed back leveling passageway between centre gripping rod and the back down centre gripping rod, it includes the obstruction pole elevating system that obstruction pole and drive obstruction pole go up and down to hinder the mechanism, preceding centre gripping rod down, back are gone up and are equipped with the confession on centre gripping rod and the back down centre gripping rod the bellied annular of dodging that passes through, it is used for hindering the obstruction pole and is in the transformer fin front end bellied the place ahead makes the transformer fin stop in the back leveling passageway with being used for hindering in the rear end of transformer fin. When the spot welding machine is used, transformer radiating fins formed by two overlapped metal sheets are continuously placed on a spot welding machine feeding conveying line, when the transformer radiating fins are positioned on the spot welding machine feeding conveying line, two bulges are distributed along the conveying direction of the spot welding machine feeding conveying line, namely the front and back directions, when the front ends of the first transformer radiating fins conveyed to the spot welding machine are positioned between electrodes of the spot welding machine, the spot welding machine stops, the spot welding machine is started to weld the front ends of the first transformer radiating fins together, the spot welding machine feeding conveying line is continuously conveyed to the position, between the electrodes of the spot welding machine, of the rear ends of the first transformer radiating fins, the spot welding machine stops again, the spot welding machine starts again to weld the rear ends of the first transformer radiating fins together, and therefore the spot welding of each transformer radiating fin is sequentially completed. After spot welding is completed, the transformer radiating fins are conveyed to the flattening machine for leveling under the action of the feeding conveying line of the flattening machine, and then the transformer radiating fins are conveyed to the seam welding machine through the feeding conveying line of the seam welding machine for seam welding. Because set up the flatting mill and carry out the flattening with the transformer fin before seam welding to the quality when making seam welding is good. The feeding of the spot welding machine and the conveying of the transformer radiating fins from the spot welding machine to the seam welding machine are completed through the conveying line, continuous production can be carried out, the space required by turnover inventory is reduced, and time and labor are saved.

The process of leveling the radiating fins of the transformer comprises the following steps: the method comprises the steps that firstly, transformer radiating fins are located in a front leveling channel and are retained in the front leveling channel for a period of time under the action of a blocking rod, then leveling is carried out under the clamping action of a front upper clamping rod and a front lower clamping rod, then the blocking rod is kept away to enable the transformer radiating fins to enter a rear leveling channel, the transformer radiating fins are retained in the rear leveling channel for a period of time under the blocking action of the blocking rod, then secondary leveling is carried out under the clamping action of the rear upper clamping rod and the rear lower clamping rod, and the front leveling channel can level another transformer radiating fin synchronously while the rear leveling channel levels one transformer radiating fin. The flattening structure can be used for carrying out secondary flattening on the transformer radiating fin, the flattening effect is good, and the flattening time can be controlled and set. The flattening channel is formed through the clamping rods, the transformer radiating fins can be completed by the aid of the conveying line when entering and exiting the flattening channel, and feeding and discharging are convenient. The blocking mechanism can simultaneously block the transformer radiator in the front and rear leveling channels by virtue of the bulges of the transformer radiating fins, and the structure is compact.

Preferably, the height of the front leveling channel is smaller than the thickness of the transformer radiating fins, the height of the rear leveling channel is larger than or equal to the height of the transformer radiating fins, the height of the rear leveling channel, which is larger than the height of the transformer radiating fins, is smaller than or equal to the flatness required by the design of the transformer radiating fins, and the front leveling mechanism further comprises a front lower clamping roller driving structure for driving the front lower clamping roller to rotate. In the process that the transformer radiating fins are retained in the front leveling channel, the lower clamping roller can rotate to generate friction heating with the transformer radiating fins, so that the leveling speed of the leveling effect is improved.

Preferably, the front flattening mechanism further comprises a front upper clamping roller driving structure for driving the front upper clamping roller to rotate. In the process that the transformer radiating fins are retained in the front leveling channel, the upper clamping roller can rotate to generate friction heating with the transformer radiating fins, so that the leveling effect and the leveling speed are further improved.

Preferably, the transformer fins located in the rear leveling tunnel are pushed out of the rear leveling tunnel only by the movement of the transformer fins located in the front leveling tunnel. The transformer cooling fin can be basically in a heat dissipation state in the process of leveling in the rear leveling channel, so that the leveling efficiency can be improved.

Preferably, the barrier rod lifting mechanism comprises two lifting cylinders and two sliding blocks, the two sliding blocks are connected to two ends of the barrier rod in a one-to-one correspondence mode, the sliding blocks are connected to the frame of the flattening machine portion in a sliding mode, and the two sliding blocks are connected with the two lifting cylinders in a one-to-one correspondence mode.

Preferably, the barrier rod is located at a position for blocking the transformer heat sink when the barrier rod lifting cylinder is in the extended state. The transformer heat dissipation fin can prevent the blocking rod from losing the blocking effect when the transformer is accidentally broken, so that the transformer heat dissipation fin can flow away without other component leveling.

Preferably, the front upper clamping roller and the rear upper clamping roller are connected to the frame of the flattening machine part in a lifting manner. So that the height of the leveling channel can be adjusted to use the leveling of the transformer radiating fins with different thicknesses. The universality is good.

Preferably, the bottom surface of the front leveling channel and the bottom surface of the rear leveling channel are located on the same plane. Deformation can be prevented from occurring in the process of entering the rear leveling channel from the front leveling channel.

Preferably, the feeding end of the feeding conveying line of the spot welding machine is further provided with a welding surface cleaning structure and a metal sheet aligning mechanism, and the metal sheet aligning mechanism comprises a front aligning stop block, a front aligning stop block lifting mechanism for driving the front aligning stop block to lift, a side aligning stop block positioned on one side of the width direction of the feeding conveying line of the spot welding machine, a push block positioned on the other side of the width direction of the feeding conveying line of the spot welding machine and a push block moving mechanism for driving the push block to move back and forth towards the side aligning stop block. When the spot welding device is used, the welding surface of the metal sheets is cleaned through the welding surface cleaning structure, and then the two metal sheets are aligned under the action of the metal sheet aligning mechanism and flow to the spot welding machine for spot welding. Because the on-line cleaning is adopted, the welding surface is not easy to be polluted by secondary oxidation before spot welding, thereby improving the quality of spot welding.

Preferably, the welding surface cleaning structure comprises a cleaning structure part rack, a friction plate, a lower pressing wheel positioned below the friction plate, an upper pressing wheel positioned above the friction plate and a pushing mechanism for driving transformer cooling fins to pass through between the upper pressing wheel and the lower pressing wheel are arranged on the cleaning structure part rack, a lower metal sheet polishing channel is formed between the friction plate and the lower pressing wheel, and an upper metal sheet polishing channel is formed between the friction plate and the upper pressing wheel. When the device is used, the metal sheets positioned below in the two overlapped metal sheets are driven to pass through the lower friction channel and the metal sheets positioned above pass through the upper friction channel under the action of the pushing mechanism, and the friction plate simultaneously rubs the lap joint surfaces of the two metal sheets through the friction channel so as to remove an oxide layer and dust on the surfaces of the two metal sheets to realize cleaning, so that the effect of improving the spot welding quality is achieved. The second object of the invention is achieved.

Preferably, the device further comprises a blower for blowing air to the surface of the metal sheet rubbed by the friction plate.

Preferably, an upward inclined feeding guide inclined plane is arranged on the lower surface of the feeding end of the friction plate, and the distance from one end of the feeding guide inclined plane, which is far away from the friction plate, to the bottom surface of the lower metal polishing channel is greater than the thickness of the metal sheet. When the friction plate is used, the isolating block is isolated between the two metal sheets, so that the front ends of the two metal sheets are opened, and the feeding end of the friction plate can be conveniently inserted between the two metal sheets under the action of the guide inclined plane. The convenience of transformer fin when passing through the clean structure of face of weld has been improved.

Preferably, the welding surface cleaning structure further comprises two material receiving hoppers located below two ends of the friction plate, the material receiving hoppers are butted with a sliding groove located on the outer side of the frame of the cleaning structure portion, the material receiving hoppers incline towards the sliding groove, and two ends of the feeding end of the friction plate are provided with material pushing inclined planes. When the device is used, the isolation block is aligned with the material pushing inclined plane along the front-back direction, and the isolation block is pushed onto a conclusion head under the action of the material pushing inclined plane when a transformer metal sheet passes through the welding surface cleaning structure, enters the sliding groove and falls down to be collected.

Preferably, the machine frame of the cleaning structure part is provided with two vertical connecting grooves with closed lower ends, two ends of the friction plate are slidably connected in the two vertical connecting grooves in a one-to-one correspondence mode, the upper pressing wheel is rotatably connected onto the connecting block, the connecting block is arranged on a vertical guide rod, the lower end of the vertical guide rod is connected with the machine frame of the cleaning structure part, and the upper end of the vertical guide rod is connected with the connecting block through a compression spring. When the thickness of the transformer radiating fin and the thickness of the two metal sheets are different, the two metal sheets can be reliably polished.

Preferably, the upper end of the vertical guide rod is in threaded connection with an adjusting block, and the upper end of the compression spring abuts against the adjusting block. Can adjust the pressure when polishing and adapt to the transformer fin of different thickness through rotating the regulating block.

Preferably, the pushing mechanism comprises a pushing block and a translation cylinder for driving the pushing block to horizontally move in the direction perpendicular to the friction plate, and the pushing block is provided with an avoidance notch capable of being sleeved on the friction plate.

Preferably, the pushing mechanism is capable of pushing the transformer heat sink against the front alignment stop. The pushing mechanism can achieve the function of one object for two purposes.

Preferably, the seam welder further comprises a cooling mechanism, the cooling mechanism comprises a water tank, a water receiving disc and a water pump, an outlet of the water pump is connected with a nozzle for spraying water to a welding part of the transformer radiating fin welded by the seam welder through a water outlet pipe, an inlet end of the water pump is provided with a water inlet pipe extending into the water tank, the water receiving disc is used for collecting cooling water sprayed by the nozzle, and the water receiving disc is communicated with the water tank through a water return pipe. When in use, cooling water is filled in the water tank. And driving the water pump during welding, conveying cooling water in the water tank to the nozzle by the water pump, discharging the cooling water, and cooling the welding position of the transformer radiating fins, wherein the cooling water after cooling the radiating fins falls into the water receiving disc and returns to the water tank. The cooling is carried out by water cooling, and the cooling speed is high. The cooling water inner pipe of the technical scheme is recycled, and water consumption is low. The third object of the invention is achieved.

Preferably, the water tank is internally provided with a separation plate, the separation plate divides the water tank into an upper water chamber and a lower water chamber, an outlet of the water return pipe is positioned in the lower water chamber, an inlet end of the water inlet pipe is positioned in the upper water chamber, and the separation plate is provided with a filter hole for communicating the upper water chamber and the lower water chamber. The inner pipe in the mode ensures that foreign matters flowing back into the water tank along with cooling water are basically retained and precipitated in the lower water chamber, and water taken by the spray head comes from the upper water chamber, so the cleanness of water discharged by the spray head is good, and the phenomenon that the foreign matters are welded at a welding position is not easy to generate.

Preferably, the water return pipe is provided with a horizontal section positioned in the water tank, and a water outlet of the water return pipe is arranged at one end of the horizontal section in the horizontal direction. The sediment of foreign matters disturbing the lower water chamber caused by backwater can be reduced. Thereby can avoid the foreign matter to get into the hydroecium better.

The invention also comprises a temperature sensor for measuring the temperature of the cooling water flowing out of the water tank, wherein the temperature sensor is arranged in the water inlet pipe. The temperature of the cooling water flowing out can be known. The temperature sensor is arranged in the water inlet pipe, so that the influence of water-cooled cooling water on temperature measurement can be avoided, and the accuracy of the temperature of the output cooling water is improved.

The temperature sensor is fixed on the sensor fixing frame, the water inlet pipe is in threaded connection with a fixing sleeve provided with an inner flanging, and the inner flanging is matched with the end face of the water inlet pipe to fix the sensor fixing frame. The sensor mounting frame can be taken down after the solid sleeve is taken down when the sensor fixing frame is taken down. The sensor mounting frame is convenient to mount and fix.

Preferably, the sensor fixing frame comprises a supporting plate and a protective cover located above the supporting plate, the protective cover and the supporting plate enclose a sensor accommodating cavity, the temperature sensor is located in the sensor accommodating cavity, the part of the supporting plate, which forms the sensor accommodating cavity, is of a closed structure, and a communication hole communicated with the outer space in the sensor accommodating cavity is formed in the protective cover. The protection effect to temperature sensor is good, can hold the incrustation scale of intracavity with the sensor and siphon away when this mode water pump drive output water moreover to avoid the scale deposit on the sensor and influence the detection effect.

Preferably, the sensor fixing frame comprises a circular frame, the circular frame is located between the inner flanging and the end face of the water inlet pipe, and the outer diameter of the circular frame is larger than the inner diameter of the inlet end of the water inlet pipe and smaller than the outer diameter of the inlet section of the water inlet pipe. The reliability is good when fixing.

The invention also comprises a cooling fan for blowing and cooling the water in the water tray. When the temperature of the cooling water is higher than the requirement, the cooling fan is driven to radiate heat and reduce the temperature of the cooling water so as to reduce the temperature of the cooling water. The cooling fan cools down cooling water at the water collector, and the cooling effect is good.

Preferably, a vertical drain hole is formed in the bottom wall of the lower water chamber, a large-diameter section is arranged at the lower end of the vertical drain hole, a convex ring extending along the circumferential direction of the drain hole is arranged on the large-diameter section, an annular groove is formed between the convex ring and the circumferential surface of the large-diameter section, a rubber plug is arranged in the large-diameter section in a penetrating mode, a sealing head arranged in the convex ring in a penetrating mode is arranged on the rubber plug, the sealing head is connected in the convex ring in a sealing mode, a sealing ring arranged in the annular groove in a penetrating mode is arranged on the rubber plug, and the sealing ring and the large-diameter section are connected together in a sealing mode. The cooling water needs to be replaced to pull out the rubber plug to discharge the cooling water in the water tank. The mode is thorough in drainage and reliable in sealing.

Preferably, a concave pit is arranged on the lower end face of the rubber plug, and a pull ring is connected in the concave pit. The rubber plug is convenient to take out.

Preferably, the top wall of the water tank is provided with a hanging ring, the water return pipe extends along the vertical direction and is arranged on the water tank and the partition plate in a penetrating mode in a vertically moving mode, the water inlet pipe extends along the vertical direction and is arranged on the top wall of the water tank in a penetrating mode in a vertically moving mode, the distance from the lower end face of the water return pipe to the inner surface of the bottom wall of the water tank is larger than 20 centimeters, and the distance from the lower end face of the water inlet pipe to the upper surface of the partition plate is larger than 20 centimeters. When the technical scheme is used, the part for supporting the water tank is supported at the lower end of the rubber plug, so that the rubber plug can be more reliably prevented from falling off. When the rubber plug is taken out, the water tank is lifted by the lifting ring, and then the rubber plug is taken out. And the water discharging pipe do not need to be moved when the water tank is lifted, thereby improving the convenience in use.

The invention has the following advantages: the transformer radiating fins can be welded in a running water mode, so that time and labor are saved; the transformer radiating fin can be leveled before seam welding, so that the seam welding quality is good in reliability; the welding surfaces of two welded metal sheets can be welded together before spot welding, so that the effect of improving the quality reliability of spot welding is achieved; the cooling is carried out in a water cooling mode, so that the cooling effect is good; cooling water can be recycled; the spray head is not easy to block; the temperature of the sprayed cooling water can be accurately detected; the temperature sensor is not easy to damage and scale formation to influence the detection accuracy.

Drawings

Fig. 1 is a schematic top view of a first embodiment of the invention.

Fig. 2 is an enlarged top view of the leveler.

Fig. 3 is a schematic front view of the flatting machine in use.

Fig. 4 is a left side schematic view of the leveler.

Fig. 5 is a schematic front view of the spot welder.

Fig. 6 is a schematic top view of a second embodiment of the present invention.

Fig. 7 is a partially enlarged top view schematically illustrating a second embodiment of the present invention.

Fig. 8 is a front view of a weld face cleaning structure.

Fig. 9 is a left side view of the welding surface cleaning structure.

FIG. 10 is a schematic front view of the weld face cleaning configuration in use.

Fig. 11 is a schematic view of a seam welder in the third embodiment.

Fig. 12 is a partially enlarged view of a portion a of fig. 11.

Fig. 13 is a schematic view of a water tank in the fourth embodiment.

Fig. 14 is a partially enlarged schematic view of fig. 13 at B.

In the figure: seam welder 1, transformer cooling fin 2, flatting mill 3, welding gun 4, water tank 5, water receiving tray 6, water pump 7, partition plate 8, upper water chamber 9, lower water chamber 10, filtering hole 11, water outlet pipe 12, nozzle 13, water return pipe 14, outlet 15 of water return pipe, horizontal section 16, water inlet pipe 17, temperature sensor 18, sensor fixing frame 19, inward flange 20, fixing sleeve 21, circular frame 22, supporting plate 23, protective cover 24, connecting strip 25, sensor accommodating cavity 26, communication hole 27, top wall 28 of water tank, lower end surface 29 of water return pipe, sealing ring 30, hanging ring 31, vertical water drain hole 32, large diameter section 33, convex ring 34, annular groove 35, rubber plug 36, sealing head 37, pit 38, pull ring 39, water pump,

The spot welding machine 40, the spot welding machine feeding line 41, the flatting machine feeding line 42, the seam welding machine feeding line 43, the side frame 44, the support rollers 45, the flatting machine part frame 46, the front flatting mechanism 47, the blocking mechanism 48, the rear flatting mechanism 49, the adjusting block 50, the metal sheet 51, the protrusion 52, the front lower clamping bar 53, the front upper clamping bar 54, the front leveling channel 55, the rear lower clamping bar 56, the rear upper clamping bar 57, the rear leveling channel 58, the blocking rod 59, the blocking rod lifting mechanism 60, the avoidance ring groove 61, the lifting cylinder 62, the sliding block 63, the sliding head 64, the sliding hole 65, the lifting screw 66, the upper electrode 66, the lower electrode 67, the front alignment block 68, the front alignment block lifting mechanism 69, the side alignment block 70, the push block 71, the push block moving mechanism 72, the cleaning structure part frame 73, the friction plate 74, the lower pressing wheel 75, the upper pressing wheel 76, the pushing mechanism 77, the lower metal sheet polishing channel 78, The metal sheet grinding device comprises an upper metal sheet grinding channel 79, a feeding guide inclined plane 80, a receiving hopper 81, a sliding chute 82, a pushing inclined plane 83, a vertical connecting groove 84, a connecting block 85, a vertical guide rod 86, a compression spring 87, a pushing block 88, a translation cylinder 89 and an avoiding notch 90.

Detailed Description

The invention is further described with reference to the following figures and examples.

Referring to fig. 1, a welding line for transformer cooling fins comprises a spot welding machine 40, a flattening machine 3 and a seam welding machine 1 which are arranged in sequence from back to front. The feeding end of the spot welding machine is provided with a spot welding machine feeding conveying line 41. A flattening machine feeding conveying line 42 is arranged between the spot welding machine and the flattening machine. And a seam welder feeding conveying line 43 is arranged between the flattening machine and the seam welder. The structure of the feeding conveying line is the same, and the feeding conveying line comprises two parallel side frames 44 which are arranged oppositely, supporting rollers 45 are arranged on the inner sides of the side frames, the supporting rollers are rotatably connected to the side frames, the supporting rollers are connected together through chains or belts and then are driven by a motor to rotate. The leveler includes a leveler portion frame 46. A front flattening mechanism 47, a stopping mechanism 48 and a rear flattening mechanism 49 are sequentially arranged on the frame of the flattening machine part

Referring to fig. 2, 3 and 4, the transformer heat sink 2 comprises two metal sheets 51 stacked together. The front and rear ends of the metal sheet are provided with protrusions 52 constituting oil ports. The front flattening mechanism comprises 3 front lower clamping rods 53 which are positioned on the same plane and are rotatably connected to the flattening

machine part frame

46 and 2 front upper clamping rods 54 which are positioned on the same plane and are rotatably connected to the flattening machine part frame. A front leveling channel 55 is formed between the front upper and lower clamping bars. The rear flattening mechanism comprises 3 rear lower clamping rods 56 which are positioned on the same plane and are rotatably connected to the frame of the flattening machine part and 2 rear upper clamping rods 57 which are positioned on the same plane and are rotatably connected to the frame of the flattening machine part. A rear leveling channel 58 is formed between the rear upper and lower clamping bars. The arresting mechanism includes an arresting bar 59 and an arresting bar elevating mechanism 60 that drives the arresting bar to be elevated. The front lower clamping rod is provided with an avoidance ring groove 61 which extends along the circumferential direction of the front lower clamping rod and is used for the protrusion to pass through. And avoidance ring grooves for the protrusions to pass through are formed in the front upper clamping rod, the front lower clamping rod, the rear upper clamping rod and the rear lower clamping rod which are used together. The blocking rod is used for blocking the front of the bulge at the front end of the transformer radiating fin so that the transformer radiating fin stays in the front leveling channel, and is used for blocking the front of the bulge at the rear end of the transformer radiating fin so that the transformer radiating fin stays in the rear leveling channel. The height of the front leveling channel is smaller than the thickness of the transformer radiating fins. The height of the rear leveling channel is larger than or equal to that of the transformer radiating fins. The value that the height of the rear leveling channel is larger than the height of the transformer radiating fin is smaller than or equal to the flatness required by the design of the transformer radiating fin. The front flattening mechanism also comprises a front lower clamping roller driving structure for driving the front lower clamping roller to rotate. The front flattening mechanism further comprises a front upper clamping roller driving structure for driving the front upper clamping roller to rotate. The transformer radiating fins in the rear leveling channel are pushed out of the rear leveling channel only through the movement of the transformer radiating fins in the front leveling channel, namely, the rear lower clamping rod and the rear upper clamping rod are not provided with power mechanisms for driving. The arresting bar lifting mechanism includes two lifting cylinders 62 and two sliders 63. The two sliding blocks are connected to two ends of the blocking rod in a one-to-one correspondence mode. The sliding blocks are connected on two sides of the width direction of the frame of the flattening machine part in a sliding way in an up-and-down sliding way. The two sliding blocks are connected with the piston rods of the two lifting cylinders in a one-to-one correspondence mode. The cylinder body of the lifting cylinder is connected with the frame of the flattening machine part. When the blocking rod lifting cylinder is in an extending state, the blocking rod is located at the position of a transformer radiating fin, namely the lowest side of the blocking rod is lower than the lowest side of the front upper clamping rod and the lowest side of the first rear lower clamping rod. The front upper clamping rod and the rear upper clamping rod are connected to the flattening machine part rack in a lifting manner, and specifically, two ends of each front upper clamping rod and the rear upper clamping rod are rotatably connected to a sliding head 64. The frame of the flattening machine part is provided with a slide hole 65 extending in the vertical direction. The sliding head is connected in the sliding hole in a sliding way. The slider is suspended at the lower end of a lifting screw 66 which can rotate as a slider. The lifting screw is rotationally connected to the frame of the flattening machine part. The sliding head is driven to move up and down by rotating the lifting screw rod, so that the upper clamping rod is lifted up and down to change the height of the front and rear leveling channels. The bottom surface of the front leveling channel and the bottom surface of the rear leveling channel are located on the same plane.

Referring to fig. 5, the spot welder includes a welder body and a plurality of upper electrodes 66 distributed along a width direction of a feeding conveyor line of the spot welder (i.e., a left-right direction of fig. 1) and a plurality of lower electrodes 67 distributed along the width direction of the feeding conveyor line of the spot welder (i.e., a left-right direction of fig. 1). The upper electrodes and the lower electrodes are aligned in one-to-one correspondence. The spot welder is of an existing structure.

Referring to fig. 1 to 5, when in use, the transformer radiating fin formed by two overlapped metal sheets is continuously placed on the feeding conveying line of the spot welding machine, when the transformer radiating fin is positioned on the feeding conveying line of the spot welding machine, the two bulges are distributed along the conveying direction of the feeding conveying line of the spot welding machine, namely the front and back directions, when the front end of the first transformer radiating fin is conveyed to a position between an upper electrode and a lower electrode of the spot welding machine, the point welding machine feeding conveying line stops, the spot welding machine is started to weld the front end of the first transformer radiating fin together, the point welding machine feeding conveying line continues to convey the rear end of the first transformer radiating fin to a position between the electrodes of the spot welding machine, the point welding machine feeding conveying line stops again, the spot welding machine is started again to weld the rear end of the first transformer radiating fin together, and therefore the spot welding of each transformer radiating fin is completed in sequence. After spot welding is finished, the transformer radiating fins are conveyed to the flattening machine for flattening under the action of the feeding conveying line of the flattening machine, and then the transformer radiating fins are conveyed to the seam welding machine through the feeding conveying line of the seam welding machine for seam welding. Seam welding machines are of conventional construction.

Referring to fig. 2 to 4, the process of leveling the transformer cooling fin by the leveler is as follows: the transformer cooling fin leveling device comprises a front leveling channel, a lifting cylinder, a blocking rod, an upper clamping rod, a lower clamping rod, a transformer cooling fin, a lifting cylinder and a lifting cylinder, wherein the transformer cooling fin enters the front leveling channel, the lifting cylinder is in an extension state, the transformer cooling fin is retained in the front leveling channel for a period of time under the action of the blocking rod, the leveling is performed under the clamping action of the upper clamping rod and the lower clamping rod, the upper clamping rod is driven by a driving structure of the upper clamping rod to rotate so as to perform friction heat dissipation with the upper surface of the transformer cooling fin in the leveling process, the temperature of the transformer cooling fin is increased, the lower clamping rod is driven by a driving structure of the lower clamping rod to rotate so as to perform friction heat dissipation with the lower surface of the transformer cooling fin, and the temperature of the transformer cooling fin is increased as a result of temperature increase. Then the resistance rods are lifted up and down nationwide to be avoided, as a result, transformer radiating fins enter the rear leveling channel, when the bulge at the front end of the transformer radiator passes through the resistance rods, the full-front-end resistance rods are lifted up and down, so that the bulge at the rear end of the transformer radiator in the rear leveling channel is resisted by the blocking rods and is retained for a certain time in the rear leveling channel, secondary leveling is carried out under the clamping action of the rear upper clamping rods and the rear lower clamping rods at the moment, and the rear lower clamping rods and the rear upper clamping rods are kept still when the rear leveling channel is leveled, so that the transformer radiating fins are set to be subjected to radiating hardening shaping. The rear leveling channel can level one transformer radiating fin, and the front leveling channel can level the other transformer radiating fin synchronously.

The second embodiment is different from the first embodiment in that:

referring to fig. 6 to 9, the feeding end of the feeding conveying line of the spot welding machine is also provided with a welding surface cleaning structure and a metal sheet aligning mechanism. The sheet metal aligning mechanism comprises a front aligning stop block 68, a front aligning stop block lifting mechanism 69 for driving the front aligning stop block to lift, a side aligning stop block 70 positioned on one side of the width direction of the feeding conveying line of the spot welding machine, a push block 71 positioned on the other side of the width direction of the feeding conveying line of the spot welding machine and a push block moving mechanism 72 for driving the push block to move back and forth towards the side aligning stop block. The front alignment block lifting mechanism 69 and the push block moving mechanism 72 are both air cylinders. The weld face cleaning structure includes a cleaning structure portion frame 73. The frame of the cleaning structure part is provided with a friction plate 74, a lower pressing wheel 75 positioned below the friction plate, an upper pressing wheel 76 positioned above the friction plate and a pushing mechanism 77 for driving the transformer cooling fins to pass between the upper pressing wheel and the lower pressing wheel. A lower sheet metal grinding channel 78 is formed between the friction plate and the lower press wheel. An upper sheet metal grinding channel 79 is formed between the friction plate and the upper press wheel. The lower surface of the feed end of the friction plate is provided with an upwardly inclined feed guide ramp 80. The distance from one end of the feeding guide inclined plane far away from the friction plate to the bottom surface of the lower metal polishing channel is larger than the thickness of the metal sheet. The welding surface cleaning structure further comprises two receiving hoppers 81. The two material receiving hoppers are positioned below the two axial ends of the upper pressing roller of the friction plate. The receiving hopper is butted together with a chute 82 positioned at the outer side of the frame of the cleaning structure part. The spout is for the rear slope make the object that is located in the spout slide to the rear end of spot welder material loading transfer chain namely material loading end. The receiving hopper is inclined towards the chute. Two ends of the feed end of the friction plate are provided with pushing slopes 83. The cleaning structure is provided with two vertical connecting slots 84 with closed lower ends. Two ends of the friction plate are slidably connected in the two vertical connecting grooves in a one-to-one correspondence manner. The upper pressing wheel is rotatably connected to the connecting block 85. The connecting block is arranged on a vertical guide rod 86 with the lower end connected with the frame of the cleaning structure part. The upper end of the vertical guide rod is in threaded connection with an adjusting block 50. The vertical guide rod is sleeved with a compression spring 87. The lower end of the compression spring is connected with the connecting block, and the upper end of the compression spring is connected with the adjusting block. The pushing mechanism includes a pushing block 88 and a translation cylinder 89 that drives the pushing block to move horizontally in a direction perpendicular to the friction plate. The ejector pad is provided with an avoiding notch 90 which can be sleeved on the friction plate. The pushing mechanism can push the transformer heat sink against the front alignment stop.

The cleaning process of the invention comprises

Referring to fig. 6 to 10, two metal sheets are overlapped and placed on the feeding section of the spot welder feeding conveying line, 2 isolating pads are arranged between the front ends of the two metal sheets, the front ends of the two metal sheets are in an open state, and the 2 isolating pads are aligned with two material pushing inclined planes 83 at the two ends of the friction plate along the front-back direction. Under the action of a feeding conveying line of a spot welding machine, the two metal sheets move forward to be abutted with the friction plates together to stop moving. At this moment, the pushing block is driven to simultaneously drive the two metal sheets to move forwards through the translation cylinder, so that the metal sheets positioned below pass through the lower friction channel and the metal sheets positioned above pass through the upper friction channel, and the in-process friction plate simultaneously rubs the lapping surfaces of the two metal sheets through the friction channel to remove the oxide layer and dust on the surfaces to realize cleaning, thereby starting the effect of improving the spot welding quality. The material pushing inclined plane pushes the isolation pads down from between the two metal sheets to correspondingly fall into the two material receiving discs one by one, and then the isolation pads roll down into the sliding groove and slide to the feeding end of the feeding conveying line of the spot welding machine so as to be recycled.

The third embodiment is different from the second embodiment in that:

referring to fig. 11 and 12, a cooling mechanism is also included. The cooling mechanism comprises a water tank 5, a water pan 6 and a water pump 7. A separation plate 8 is arranged in the water tank. The division plate divides the tank into an upper chamber 9 and a lower chamber 10. The isolating plate is provided with a filtering hole 11 communicating the upper water chamber and the lower water chamber. The outlet of the water pump is connected with a nozzle 13 through a water outlet pipe 12. There are 2 nozzles. The two nozzles are used for spraying water to the welding parts welded by the welding guns 4 of the roller structure of the two seam welding machines of the transformer radiating fin in a one-to-one correspondence manner. The water pan is used for collecting cooling water sprayed by the nozzles. The water receiving tray is communicated with the water tank through a water return pipe 14. The water return pipe enters the water chamber through the top wall of the water tank, the upper water chamber and the partition plate, and the water return pipe and the water tank are not required to be connected in a sealing mode and cannot generate the water leakage problem, so that the convenience in manufacturing is improved. The outlet 15 of the return pipe is located in the lower water chamber. The return pipe enters the water chamber through the top wall 28 of the water tank, the upper water chamber and the partition plate. The return pipe is provided with a horizontal section 16 located in the downcomer chamber. The water outlet of the water return pipe is arranged at one end of the horizontal section in the horizontal direction. The inlet end of the water pump is provided with a water inlet pipe 17 which only extends into the upper water chamber. The invention also comprises a temperature sensor 18 and a sensor holder 19 for measuring the temperature of the cooling water flowing out of the water tank. The temperature sensor is fixed on the sensor fixing frame. The water inlet pipe is connected with a fixed sleeve 21 provided with an inner flanging 20 in a threaded manner. The end face of the inner flanging matched with the water inlet pipe is used for fixing the sensor fixing frame. The sensor mount comprises a circular frame 22, a support plate 23 and a protective cover 24 located above the support plate. The support plate is connected with the circular frame through a plurality of connecting strips 25. The circular frame is positioned between the inner flanging and the end surface of the water inlet pipe. The outer diameter of the circular frame is larger than the inner diameter of the inlet end of the water inlet pipe and smaller than the outer diameter of the inlet section of the water inlet pipe. The outer diameter of the circular frame is larger than the inner diameter of a circle surrounded by the inner flanging, namely the diameter of an opening at the lower end of the solid sleeve. The shield and the platform enclose a sensor receiving cavity 26. The temperature sensor is located in the sensor accommodation cavity. The part of the supporting plate, which forms the sensor accommodating cavity, is of a closed structure. The protective cover is provided with a communication hole 27 for communicating the space inside and outside the sensor accommodating chamber. The embodiment also comprises a cooling fan for blowing and cooling the water in the water tray.

When the water cooling device is used, water in the upper water chamber is conveyed to the nozzle through the water pump and sprayed out to cool the welding part of the transformer radiating fin, and the water sprayed out of the nozzle cools the transformer radiating fin, falls into the water receiving tray and then flows back to the lower water chamber. When the temperature sensor detects that the water level is higher than 80 ℃, the cooling fan is started to cool the cooling water. The water tank, the water return pipe, the water inlet pipe and the water outlet pipe are all made of heat conducting materials.

The fourth embodiment is different from the third embodiment in that:

referring to fig. 13 and 14, a hanging ring 31 is provided on the top wall of the water tank. The return pipe can wear to establish on water tank and baffle with reciprocating. The water outlet pipe extends along the up-down direction and can be arranged on the top wall of the water tank in a penetrating way in a vertically moving way. The distance between the lower end surface 29 of the water return pipe and the inner surface of the bottom wall of the water tank is more than 20 cm. The inner surface of the bottom wall of the water tank is a plane. The distance between the lower end surface of the water outlet pipe (namely the lower end surface of the solid sleeve) and the upper surface of the partition board is more than 20 cm.

The bottom wall of the lower water chamber is provided with a vertical drain hole 32. The lower end of the vertical drain hole is provided with a large-diameter section 33. The large diameter section is provided with a convex ring 34 extending along the circumferential direction of the drain hole. An annular groove 35 is formed between the convex ring and the circumferential surface of the large-diameter section. A rubber plug 36 is arranged in the large-diameter section in a penetrating way. The rubber plug is provided with a sealing head 37 which is arranged in the convex ring in a penetrating way. The sealing head is connected in the convex ring in a sealing way through self elastic deformation. The rubber plug is provided with a sealing ring 30 which is arranged in the annular groove in a penetrating way. The sealing ring is connected with the large-diameter section in a sealing mode through self deformation. The lower end face of the rubber plug is provided with a pit 38. A pull ring 39 is attached within the pocket.

When changing the water in the water tank, hang up the water tank through rings and make the water tank rise and make the diapire of water tank lift from supporting ground equivalent to outlet pipe and wet return, then pull the pull ring and take out rubber plug can.

Claims

1. A transformer radiating fin welding production line comprises two metal sheets which are overlapped together, wherein the front end and the rear end of each metal sheet are provided with bulges forming oil ports, the transformer radiating fin welding production line is characterized by comprising a spot welding machine, a flattening machine and a seam welding machine which are sequentially arranged, a feeding end of the spot welding machine is provided with a spot welding machine feeding conveying line, a flattening machine feeding conveying line is arranged between the spot welding machine and the flattening machine, a seam welding machine feeding conveying line is arranged between the flattening machine and the seam welding machine, the flattening machine comprises a flattening machine part rack, a front flattening mechanism, a blocking mechanism and a rear flattening mechanism, the front flattening mechanism comprises a plurality of front lower clamping rods which are positioned on the same plane and are rotatably connected onto the flattening machine part rack, and a plurality of front upper clamping rods which are positioned on the same plane and are rotatably connected onto the flattening machine part rack, and a front flattening channel is formed between the front upper clamping rods and the front lower clamping rods, the mechanism that flattens after include that a plurality of rotations that are located on same plane are connected and are connected centre gripping rod and a plurality of rotations that are located on same plane are connected after in the quick-witted portion frame of flattening, after go up centre gripping rod and back down and form back flattening passageway, it includes the stop rod elevating system that stop rod and drive stop rod go up and down to stop the mechanism, preceding centre gripping rod down, back are gone up and are all equipped with the confession on centre gripping rod and the back lower centre gripping rod the protruding annular of dodging that passes through, the stop rod is used for stopping make transformer fin stop in the bellied the place ahead of transformer fin front end in preceding flattening passageway and be used for stopping on transformer fin's rear end the bellied place ahead makes transformer fin stop in the back flattening passageway, the material loading end of spot welder material conveying line still is equipped with welding face cleaning structure and sheetmetal alignment mechanism, the sheet metal aligning mechanism comprises a front aligning stop block, a front aligning stop block lifting mechanism for driving the front aligning stop block to lift, a side aligning stop block positioned on one side of the width direction of a feeding conveying line of the spot welding machine, a push block positioned on the other side of the width direction of the feeding conveying line of the spot welding machine and a push block moving mechanism for driving the push block to move back and forth towards the side aligning stop block, the welding surface cleaning structure comprises a cleaning structure part rack, a friction plate, a lower pressing wheel positioned below the friction plate, an upper pressing wheel positioned above the friction plate and a driving transformer radiating fin positioned above the friction plate are arranged on the cleaning structure part rack, a pushing mechanism passing through between the upper pressing wheel and the lower pressing wheel is arranged on the cleaning structure part rack, a sheet metal polishing channel is formed between the friction plate and the lower pressing wheel, and an upper sheet metal polishing channel is formed between the friction plate and the upper pressing wheel.

2. The transformer cooling fin welding production line of claim 1, wherein the height of the front leveling channel is smaller than the thickness of the transformer cooling fin, and the front leveling mechanism further comprises a front lower clamping roller driving structure for driving the front lower clamping roller to rotate.

3. The transformer fin welding assembly line of claim 2, wherein the front flattening mechanism further comprises a front upper clamping roller driving structure for driving the front upper clamping roller to rotate.

4. The transformer fin welding line of claim 2 or 3, wherein transformer fins located in the rear leveling channel are pushed out of the rear leveling channel only by movement of transformer fins located in the front leveling channel.

5. The transformer cooling fin welding production line of claim 1, wherein an upward inclined feeding guide inclined surface is arranged on the lower surface of the feeding end of the friction plate, and the distance from one end of the feeding guide inclined surface far away from the friction plate to the bottom surface of the lower metal grinding channel is larger than the thickness of the metal sheet.

6. The transformer cooling fin welding production line of claim 5, wherein the welding surface cleaning structure further comprises two receiving hoppers located below two ends of the friction plate, the receiving hoppers are butted with a sliding groove located on the outer side of the frame of the cleaning structure portion, the receiving hoppers are inclined towards the sliding groove, and two ends of the feeding end of the friction plate are provided with pushing slopes.

7. The transformer cooling fin welding production line of claim 1, wherein the cleaning structure part frame is provided with two vertical connecting grooves with closed lower ends, two ends of the friction plate are slidably connected into the two vertical connecting grooves in a one-to-one correspondence manner, the upper pressing wheel is rotatably connected onto a connecting block, the connecting block is arranged on a vertical guide rod with the lower end connected with the cleaning structure part frame in a penetrating manner, and the upper end of the vertical guide rod is connected with the connecting block through a compression spring.

8. The transformer fin welding line of claim 1, wherein the pushing mechanism is capable of pushing a transformer fin against the front alignment stop.