End button box automatic welding machine

Abstract

The application discloses an end button box automatic welding machine and belongs to the technical field of automatic production of electric meters. The end button box automatic welding machine comprises a dividing disc, a rotating shaft, a rotating disc motor and a speed reducer which are arranged at the center of the dividing disc, a plurality of clamps which are arranged in a central array mode on the dividing disc and are configured to accommodate workpieces, a feeding mechanism which is arranged at the outer edge of the dividing disc and is configured to place the workpieces on the clamps, a welding mechanism which is arranged at the outer edge of the dividing disc and is configured to perform welding operation on the workpieces on the clamps, and a discharging mechanism which is arranged at the outer edge of the dividing disc and is configured to take the finished products off the clamps. Two sets of welding mechanisms are arranged at the outer edge of the dividing disc, and the welding mechanisms comprise left and right two groups of welding components which are arranged in a direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic production equipment of electric meter, in particular to an automatic welding machine for end button box. BACKGROUND

[0002] With the development of society and the continuous innovation of electric power industry, various functional electric meters are constantly emerging, which are used very frequently in families and enterprises, and thus are installed and replaced very frequently. At present, most electric meters are provided by power supply bureaus, and the specifications of such electric meters are similar. The end button box of the electric meter shell is one of the important components of the electric meter, and the main body realizes the functions of wiring connection of the circuit, power-off of the relay and measurement of electric quantity of the mutual inductor. As an ordinary single electric meter, four wiring posts are arranged on the end button box, which are respectively used for incoming fire line, outgoing fire line, incoming zero line and outgoing zero line. The relay has two ports, which need to be connected across the incoming fire line and the outgoing fire line, so as to realize the function of forced power-off. The mutual inductor also has two ports, which need to be connected across the incoming zero line and the outgoing zero line, so as to realize the function of measuring electric quantity.

[0003] The existing port wiring of the electric meter is usually connected by screw fixing. The existing disadvantages include that long-time transportation may cause the screw fixing to be loose, and thus there is a possibility of burning the meter during use; the screw fixing has the risk of poor contact, especially in the case of continuous large current, which causes the connection to be overheated and other risks; the screw fixing also has the risk of interface oxidation when used for a long time, especially in humid or coastal environments. In addition, after the electric meter is delivered, in order to prevent accidental disassembly or modification, the electric meter shell is lead-sealed after the meter is calibrated. Therefore, a more reliable solution needs to be provided for the connection and installation of the electric meter.

[0004] The present application is dedicated to the research on automatic welding of the end button box, and an automatic welding machine for the end button box is developed to improve the automatic welding efficiency of the end button box and improve the quality of the end button box product. SUMMARY

[0005] The present application aims to provide an automatic welding machine for the end button box to improve the automatic welding efficiency of the end button box and improve the quality of the end button box product.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0007] An automatic welding machine for the end button box, comprising:

[0008] A dividing disc, the center of the dividing disc is arranged with a rotating shaft, a disc motor and a speed reducer, a plurality of clamps are arranged in a central array manner on the dividing disc, and the clamps are configured to accommodate workpieces;

[0009] A loading mechanism is arranged at the outer edge of the indexing turntable, which is configured to place the workpiece on the clamp;

[0010] A welding mechanism is arranged at the outer edge of the indexing turntable, which is configured to perform welding operation on the workpiece on the clamp;

[0011] An unloading mechanism is arranged at the outer edge of the indexing turntable, which is configured to take the finished product off the clamp;

[0012] The outer edge of the indexing turntable is arranged with two sets of welding mechanisms, which include two groups of welding components arranged in opposite directions, and the welding heads of the welding components are arranged in a spaced manner to weld the workpiece, a plurality of trays are vertically stacked on the loading mechanism, a plurality of workpieces are placed on the trays, and a loading arm is arranged at the top of the loading mechanism, which places the workpiece on the clamp through multi-axis movement.

[0013] Further, the loading mechanism includes a tray, a lifting component, a tray limiting component, a tray translation component, and a loading arm, the lifting component includes a lifting plate and a lifting plate driving mechanism, the lifting plate driving mechanism can drive the lifting plate to displace in the vertical direction, the lifting plate can carry the tray, the tray limiting component is arranged above the lifting component, the loading arm is arranged on one side of the tray limiting component, the loading arm includes an X-axis sliding rail and a servo cylinder, a Y-axis sliding rail and a servo cylinder, and a Z-axis sliding rail and a servo cylinder, and a grabbing clamp arm is arranged on the Z-axis sliding rail.

[0014] Further, the tray has a rectangular structure and a flat bottom, limit grooves are arranged on the front and back sides of the tray, four bearing columns are arranged at the four corners of the tray, the top and bottom of each bearing column have a male-female groove structure, and four limit grooves are arranged at the four corners of the tray.

[0015] Further, the tray limiting component includes clamping guide wheel mechanisms arranged on two sides, the clamping guide wheel mechanisms have an L-shaped structure, servo cylinders are arranged on the outer sides of the clamping guide wheel mechanisms, and the clamping guide wheel mechanisms include a bottom guide wheel group and a side guide wheel group.

[0016] Further, wedge-shaped limiting blocks are arranged on the outer sides of the clamping guide wheel mechanisms, servo cylinders are arranged on the outer sides of the wedge-shaped limiting blocks, and the wedge-shaped limiting blocks can be inserted into the limit grooves of the tray.

[0017] Further, the tray translation component is arranged below the tray limiting component and includes a clamping arm connected with a clamping cylinder, a vertical movement cylinder, and a horizontal movement cylinder, and the clamping arm can clamp the tray.

[0018] Further, a rotating servo cylinder is arranged on the Z-axis slide rail, and the rotating servo cylinder is configured to drive the horizontal rotation of the grabbing arm.

[0019] Further, the welding mechanism comprises a welding table in a sliding connection state with the framework through a horizontal slide rail, a servo cylinder arranged at the rear end of the welding table, the servo cylinder being configured to drive the displacement of the welding table at the horizontal slide rail, two groups of welding components arranged in a left-right direction at the front end of the welding table, the welding components comprising a welding seat and a vertical slide rail, the welding seat being in a sliding connection state with the welding table through the vertical slide rail, a servo cylinder arranged on the welding table, the servo cylinder being configured to drive the displacement of the welding seat at the vertical slide rail, an electrode arm arranged on the welding seat, and a welding head assembly arranged at the front end of the electrode arm, the electrode arm and the welding head assembly on the same side being arranged in a vertical direction center alignment.

[0020] Further, the horizontal slide rail and the vertical slide rail are both dovetail slide rail structures.

[0021] Further, the welding head assembly comprises a mounting block and an electrode head, the rear end of the mounting block being in a circular table structure, the inside of the mounting block being a hollow structure, the front end of the electrode arm being capable of accommodating the circular table structure of the mounting block, and the mounting block and the electrode arm being stably connected through the interference fit of the circular table wedge structure.

[0022] Further, the electrode arm is a circular tube structure, the inside of the electrode arm being a hollow structure, a water guide pipe being arranged in the hollow cavity, a water inlet pipe interface and a water outlet pipe interface being arranged at the rear end of the electrode arm, the water inlet pipe interface being connected with the water guide pipe, and the water outlet pipe interface being through the hollow cavity.

[0023] After adopting the scheme, compared with the prior art, the following advantages are achieved:

[0024] The scheme is dedicated to implementing the welding connection operation of the end button box and providing support for high-speed automatic welding. The end button box automatic welding machine receives the trays arranged in a stacked state and provided with workpieces from a feeding trolley at a feeding mechanism, and under the action of a lifting component, the trays are sequentially sent vertically upward to a tray limiting component, and the trays are accurately positioned by the tray limiting component. Then, a grabbing arm grabs the current workpiece, and the workpiece is accurately transferred and placed on the corresponding clamp of the indexing turntable through the movement of multiple shafts. When the workpieces of the current tray are sequentially taken, the empty tray is translated to one side under the action of a tray translation component, and the empty tray is sequentially placed on the feeding trolley under the action of the other group of tray limiting components and the lifting component.

[0025] At the welding mechanism, through the double-head welding of the end button box assembly sent from the index disc and accurately placed, and the four welding points of the end button box assembly are welded twice, so that the possible damage to the inductor assembly and the relay assembly during welding can be prevented, and the welding efficiency is greatly improved. The resistance welding implemented by the welding table, the horizontal screw rod and the servo cylinder can greatly improve the maintenance efficiency of the welding mechanism. When the electrode head needs to be adjusted, replaced or polished and maintained, the welding table can be moved outward to implement the maintenance conveniently. The electrode head is moved and pressed by the upper and lower two groups of vertical sliding rails, which can reduce the influence of the welding mechanism on the rotation of the index disc, and the welding pressure is not applied to the index disc, so that the stability and accuracy of the index disc are improved. In addition, the welding operation can be more accurately implemented by the upward and downward movement and pressure, especially when the electrode head has a certain loss, the servo cylinder can be used for fine adjustment of the stroke, so that the welding effect is guaranteed.

[0026] The scheme has stable structure, high automation degree, small space occupation, accurate and controllable welding, and good popularization significance. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Overall structure schematic diagram of preferred embodiment.

[0028] Figure 2 Schematic diagram of end button box welding structure finished product.

[0029] Figure 3 Schematic diagram of wiring terminal assembly structure.

[0030] Figure 4 Schematic diagram of relay assembly and inductor assembly structure.

[0031] Figure 5 Overall structure schematic diagram of preferred embodiment loading table.

[0032] Figure 6 Schematic diagram of internal structure of loading table.

[0033] Figure 7 Schematic diagram of tray structure.

[0034] Figure 8 Schematic diagram of feeding trolley structure.

[0035] Figure 9 Schematic diagram of tray limiting part structure.

[0036] Figure 10 A part structure enlarged view of Figure 9

[0037] ​Figure 11 The schematic diagram of the feeding arm structure.

[0038] Figure 12 The schematic diagram of the overall structure of the preferred embodiment welding mechanism.

[0039] Figure 13 The schematic diagram of the structure of the welding part.

[0040] Figure 14 The schematic diagram of the structure of the welding head assembly. DETAILED DESCRIPTION

[0041] Reference Figure 1 An automatic terminal box welding machine, comprising a dividing disc 5, three feeding mechanisms 2, two welding mechanisms 4 and an ejection mechanism 6. The dividing disc 5 is arranged with a rotating shaft, a disc motor and a speed reducer at the center. The dividing disc 5 rotates in a step-by-step manner under the control of the rotating shaft, the speed reducer, the disc motor and the controller. Twelve clamps 51 are arranged in a central array at equal intervals on the dividing disc 5. The clamps 51 are used to accommodate and position the workpiece and transfer the current clamp 51 and the workpiece to the next work station in a step-by-step manner.

[0042] When viewed from top to bottom, the dividing disc 5 rotates in a clockwise direction in a step-by-step manner. The feeding mechanism 2A, the feeding mechanism 2B, the feeding mechanism 2C, the welding mechanism 4A, the welding mechanism 4B and the ejection mechanism 6 are arranged in sequence at the outer edge of the dividing disc 5, corresponding to one clamp 51 and performing corresponding operations.

[0043] Reference Figure 3 Figure 4 Figure 5 Specifically, the terminal box is assembled and welded by a terminal assembly 11, a relay assembly 12 and a transformer assembly 13. The terminal assembly 11 includes a structure block 110 and four horizontally arranged terminal posts. The four terminal posts are the first terminal post 111, the second terminal post 112, the third terminal post 113 and the fourth terminal post 114 from left to right. The four terminal posts are integrally formed with the structure block 110 by injection molding. The first terminal post 111, the second terminal post 112, the third terminal post 113 and the fourth terminal post 114 are cylindrical at the outer end of the structure block 110 and are used to install the connecting wires. The first terminal post 111, the second terminal post 112, the third terminal post 113 and the fourth terminal post 114 are used to realize the wire connection functions of incoming fire wire, outgoing fire wire, incoming zero wire and outgoing zero wire. Threaded holes 115 are provided at the top of the terminal posts, and the internal wires can be tightly fixed and connected with the inner wall through screws.

[0044] The first terminal post 111, the second terminal post 112, the third terminal post 113 and the fourth terminal post 114 extend out of the outer edge of the rear end of the structure block 110, have a flat structure, and have smooth upper and lower surfaces.

[0045] The relay assembly 12 is connected with two terminal pieces, the first terminal piece 121 and the second terminal piece 122 from left to right, the first terminal piece 121 and the second terminal piece 122 have smooth upper and lower surfaces, and the first terminal piece 121 and the second terminal piece 122 can be placed at the first terminal post 111 and the second terminal post 112 and can be connected by welding.

[0046] The transformer assembly 13 is arranged with two terminal blocks on both sides, the first terminal block 131 and the second terminal block 132 from left to right, the first terminal block 131 and the second terminal block 132 have smooth upper and lower surfaces, and the first terminal block 131 and the second terminal block 132 can be placed at the third terminal post 113 and the fourth terminal post 114 and can be connected by welding.

[0047] In some embodiments, the main material of the first terminal post 111, the second terminal post 112, the third terminal post 113 and the fourth terminal post 114 is red copper, which can better connect and contact with the wire and achieve better conductivity, and the main material of the first terminal piece 121, the second terminal piece 122, the first terminal block 131 and the second terminal block 132 is brass, which has good structural strength, and the terminal posts are attached with flux at the center of the upper surface, which improves the firmness during welding and improves the conductivity of the connection.

[0048] In some embodiments, the third terminal post 113 and the fourth terminal post 114 have a stepped structure 116 for accommodating the first terminal block 131 and the second terminal block 132, and the side edges of the stepped structure 116 are in precise contact with the side walls of the first terminal block 131 and the second terminal block 132, so that the transformer assembly 13 and the terminal end assembly 11 can be precisely placed and welded, improving the welding precision.

[0049] In some embodiments, in order to improve the precision and convenience of the terminal box assembly, the structure block 110 is provided with a side protrusion 117 and a side recess 118 on both sides, and an outer clamping groove 119 is also provided on both sides of the structure block 110, the protrusion 117 and the recess 118 can be inserted into the meter body structure to achieve precise installation of the terminal box, and the outer clamping groove 119 can cooperate with the buckle structure of the meter body to implement high-speed and precise meter organization.

[0050] In some embodiments, the first lug 121, the second lug 122, the first lug block 131 and / or the second lug block 131 are provided with contact pins 123. By arranging the contact pins 123, the tin soldering connection with the preset contact holes of the meter mainboard can be achieved, and the extension functions such as power taking and circuit condition determination can be realized.

[0051] Reference Figures 5-11 The feeding mechanisms 2A, 2B and 2C are respectively used for the feeding operation of the lug assembly 11, the transformer assembly 13 and the relay assembly 12. The feeding mechanisms 2A, 2B and 2C have similar structures. Taking the feeding mechanism 2B as an example, further detailed description is made below.

[0052] The feeding mechanism includes a lifting component 21, a tray 31, a tray limiting component 22, a tray translation component 23 and a feeding arm 24, which are used for accurately placing the workpieces in the tray 31 on the corresponding clamps 51.

[0053] The tray 31 is used for accommodating a plurality of workpieces (lug assemblies 11, relay assemblies 12 or transformer assemblies 13). The tray 31 has a rectangular structure, and preferably a rectangular structure for better alignment and placement. In general, the workpieces are accurately arranged in a matrix on the tray 31 through the horizontally and vertically arranged workpiece grooves. According to the differences of the workpieces, in this scheme, the workpieces have a 5x8 arrangement structure, and 40 workpieces are arranged in a single tray 31. However, different arrangement modes can be applied to different workpieces. Four bearing columns 312 are arranged at the four corners of the tray 31. Through the bearing columns 312, the upper and lower trays 31 can not interfere with each other when accommodating workpieces. The top and bottom of the bearing column 312 have a male and female groove structure, i.e., the top of the bearing column 312 is provided with an inner concave hole, and the bottom is provided with an outer convex cylinder. The outer convex cylinder can cooperate with the inner concave hole. The vertically stacked plurality of trays 31 can cooperate with each other through the bearing column 312 structure, and accurately vertically arrange and carry the trays 31. Triangle limiting grooves 313 are arranged at the front and rear sides of the tray 31 for accurate positioning function. Four through-limiting holes 314 are arranged at the four corners of the tray 31 for accurate limiting function when transported by the feeding trolley 3.

[0054] The feeding trolley 3 is used for transporting the tray 31 and the workpieces, and includes a walking part and a carrying part. The walking part includes four walking wheels 301 arranged at the four corners of the bottom of the carrying part. The carrying part has a C-shaped structure, and the front end is open. The carrying part includes a carrying frame 302 and a carrying table 303 attached to the carrying frame. The carrying frame 302 can be welded by square steel, and has good structural strength. The arrangement of the carrying table 303 can make the loading surface more flat and neat. The upper edge of the carrying table 303 can carry a plurality of trays 31. The two outer side walls of the carrying frame 302 and the carrying table 303 have flat vertical surfaces.

[0055] Four limiting columns 304 are arranged at the four corners of the bearing table 303, which are matched with four limiting holes 314 at the four corners of the tray 31. The limiting column 304 can be inserted into the limiting hole 314, and the lowermost tray 31 is carried and limited on the feeding trolley 3. Therefore, through such a structure, multiple trays 31 can be stably stacked and placed on the feeding trolley 3.

[0056] In some embodiments, the walking wheel 301 is a universal wheel, and is provided with a locking component. The operator can realize the locking and unlocking operation of the walking wheel 301 by pressing or lifting the limiting plate 305, so that the feeding trolley 3 can be in a relatively position-fixed stationary state, which is convenient for feeding or loading operation. In order to better facilitate operation, a handrail 306 is connected to the bearing table 303.

[0057] The feeding table 2 is used for feeding operation. The lifting component 21, the tray limiting component 22, the tray translation component 23 and the feeding arm 24 are all installed at the feeding table 2.

[0058] The bottom of the feeding table 2 can accommodate two feeding trolleys 3. The parking limiting component 20 is arranged at the bottom of the feeding table 1, which includes three parallel arranged parking guide rails 201 for simultaneously coping with two feeding trolleys 3. A plurality of parking guide wheels 202 are arranged vertically on the parking guide rail 201. The distance between the parking guide wheels 202 of the two parking guide rails 201 is consistent with the width of the feeding trolley 3. Parking limiting blocks are arranged at the front of the parking guide rail 201, which can contact the front end of the bearing frame 302 of the feeding trolley 3 and can limit its forward movement. Two feeding trolleys 3 can be accommodated in the feeding table 2 at the same time. One is used to carry the tray 31 and the workpiece and realize the feeding function, and the other is used to recycle the empty tray 31. Under the action of the parking limiting component 20, the feeding trolley 3 can realize the precise position parking function.

[0059] On the inner side of the loading platform 2, two sets of lifting components 21 are arranged to correspond to the two feeding trolleys 3 respectively. The lifting component 21 comprises a lifting support plate 211 and a driving mechanism for controlling the lifting of the lifting support plate 211. The rear end of the lifting support plate 211 is fixedly connected with a Z-shaped structure plate 212. The top of the Z-shaped structure plate 212 is connected with a first lead screw 213 and a first servo cylinder 214. The first lead screw 213 can drive the Z-shaped structure plate 212 and the lifting support plate 211 to move vertically under the action of the first servo cylinder 214. When the lifting support plate 211 is at the low position, it can be inserted into the C-shaped opening at the front end of the feeding trolley 3. When the lifting support plate 211 runs upward, it can drive the tray 31 and the workpiece on the feeding trolley 3 to separate from the feeding trolley 3, and make the tray 31 and the workpiece accurately displace vertically. Similarly, the lifting component 21 on the other side can displace the empty tray 31 downward and accurately place it on the corresponding feeding trolley 3.

[0060] Above the loading platform 2, two sets of tray limiting components 22 are arranged correspondingly. The tray limiting component 22 comprises a clamping guide wheel mechanism 221 arranged on both sides. The clamping guide wheel mechanism 221 is in L-shaped structure, and the outer side is arranged with a second servo cylinder 222. The clamping guide wheel mechanism 221 is arranged with a bottom guide wheel set 223 and a side guide wheel set 224. The bottom guide wheel set 223 can vertically support the current tray 31, and the side guide wheel set 224 can horizontally clamp and limit the current tray 31. When the second servo cylinder 222 separates the clamping guide wheel mechanism 221 to both sides, the uppermost tray 31 on the lifting support plate 211 can enter the clamping guide wheel mechanism 221. When the second servo cylinder 222 converges the clamping guide wheel mechanism 221 to the center, the uppermost tray 31 can be limited in the loading station;

[0061] In order to more accurately limit and position the current tray 31, a wedge-shaped limiting block 225 is arranged outside the clamping guide wheel mechanism 221. The front end of the wedge-shaped limiting block 225 is in triangular structure, and the rear end is connected with a third servo cylinder 226. The wedge-shaped limiting block 225 corresponds to four limiting grooves 313 at the four corners of the tray 31, so there are four wedge-shaped limiting blocks 225 corresponding to one tray 31. Therefore, two sets of structures correspond to both sides, and there are eight wedge-shaped limiting blocks 225. Under the action of the third servo cylinder 226, all the wedge-shaped limiting blocks 226 can move from the outside to the inside, and under the guidance of the wedge-shaped slope, the current tray 31 can be accurately positioned.

[0062] The tray translation component 23 is arranged below the tray limiting component 22, and is used to switch the tray 31 between the two tray limiting components 22, especially to translate the empty tray 31 after feeding from one side to the other side, so that the full tray 31 can be lifted from the lifting tray 211 and fed, and the translated empty tray 31 can be collected and recycled by the lifting tray 211 and the feeding trolley 3. The tray translation component 23 comprises a translation screw 231 and a fourth servo cylinder arranged on one side of the translation screw 232. A clamping arm 232 and a clamping arm cylinder are arranged on the translation screw 231. The clamping arm 232 is connected with a fifth servo cylinder 233, which is used to drive the clamping arm 232 to displace vertically. The clamping arm cylinder is used to drive the clamping arm 232 to clamp. When the clamping arm cylinder and the fifth servo cylinder 233 drive the clamping arm 232 to clamp, the clamping arm 232 can clamp the bearing column 312 of the tray 31, and under the action of the translation screw 231 and the fourth servo cylinder, the tray 31 can be driven to move from one side of the tray limiting component to the other side. During the displacement process, the tray 31 is always limited by the clamping guide mechanism 221, so as to realize precise displacement operation.

[0063] An upper feeding arm 24 is arranged on one side of the top of the feeding table 2. The upper feeding arm 24 grabs the workpiece on the tray 31 at the tray limiting component 22 and places it on the mounting station. The upper feeding arm 24 comprises an X-axis sliding rail 241 and a servo cylinder, a Y-axis sliding rail 242 and a servo cylinder, and a Z-axis sliding rail 243 and a servo cylinder. A grabbing clamping arm 244 is arranged on the Z-axis sliding rail 243. The grabbing clamping arm 244 is provided with a grabbing clamping arm servo cylinder and can drive the grabbing clamping arm 244 to grab and place the workpiece in the tray 31. In order to realize precise grabbing and placing of the workpiece, a rotating servo cylinder 245 is arranged on the grabbing clamping arm 245, so that the horizontal rotation of the workpiece during grabbing and placing can be realized by the grabbing clamping arm 244.

[0064] The upper feeding mechanism 2A, the upper feeding mechanism 2B and the upper feeding mechanism 2C have similar working modes. Taking the upper feeding mechanism 2B as an example, the actual feeding operation of the upper feeding mechanism is described in detail.

[0065] Under the control of the controller, the tray 31 is arranged with corresponding workpieces (relay assemblies 12) in an orderly manner, and is stacked and placed through the bearing column 312. The tray 31 is placed on the feeding trolley 3 through the limiting hole.

[0066] At the loading table 2, the lifting support plate 211 of the lifting component 20 is placed at the bottom position, the feeding trolley 3 is pushed to the loading station, and under the limitation of the berth limiting component 20, the left and right sides are accurately limited, the front end of the feeding trolley 3 is in close contact with the berth limiting block, and under the limitation of the feeding trolley 3 limiting plate 305, the front and rear ends are also accurately limited, so as to realize the accurate parking of the feeding trolley 3 at the loading table, and in the parking process, the lifting support plate 211 is inserted into the C-shaped opening of the feeding trolley 3 and is below the lowermost tray 31;

[0067] At the tray 31 limiting component, the clamping guide wheel mechanism 221 is in a state of separating to both sides under the action of the second servo cylinder 222, and the distance between the clamping guide wheel mechanisms 221 allows the tray 31 to pass upwards, at the lifting component 21, the lifting support plate 211 drives the tray 31 to vertically displace upwards under the action of the first lead screw 213, the first servo cylinder 214 and the Z-shaped structure plate 212, when the uppermost tray 31 reaches the clamping guide wheel mechanism 22, the clamping guide wheel mechanism 221 is operated to converge to the center under the action of the second servo cylinder 222, until the bottom guide wheel group 223 and the side guide wheel group 224 are respectively in contact with the lower edge and the side edge of the tray 31, the rear lifting support plate 211 runs downward by a distance, so that the uppermost tray 31 is in a separated state from other trays 31, that is, the adjacent bearing column 312 is in a separated state, the rear wedge limiting block 225 is accurately locked in the four limiting grooves 313 of the tray 31 under the action of the third servo cylinder 226 connected to the rear end of the wedge limiting block 225;

[0068] At the loading arm 24, under the action of the X-axis sliding rail 241 and the servo cylinder, the Y-axis sliding rail 242 and the servo cylinder, the Z-axis sliding rail 243 and the servo cylinder, the grabbing clamp arm 244, the grabbing clamp arm servo cylinder and the rotating servo cylinder 245, the loading arm 24 realizes accurate grabbing and transferring of the workpieces on the tray 31 and placing them on the mounting station, in order to improve the switching efficiency of the tray 31, during the operation of the loading arm 24, the clamping arm 232 of the tray translation component 23 clamps the bearing column 312 of the tray 31 under the action of the translation lead screw 231, the fourth servo cylinder, the fifth servo cylinder 233 and the clamping arm cylinder;

[0069] When the last workpiece of the current tray 31 is grabbed by the feeding arm 24, the wedge-shaped limiting block 225 is retracted under the action of the third servo cylinder 226 connected at its rear end, thereby releasing the locking operation on the four limiting grooves 313 of the four corners of the tray 31. Under the action of the fourth servo cylinder and the translation lead screw 231, the clamping arm 232 can drive the tray 31 to move quickly from one side to the other side of the tray limiting component 22, and the displacement of the tray 31 is always limited by the clamping guide wheel mechanism 221, realizing precise displacement operation. After the transfer operation is completed, the clamping guide wheel mechanism 221 is separated to both sides under the action of the second servo cylinder 222, and the lifting tray 211 lifts the tray 31 carried thereby upward, and when the uppermost tray 31 reaches the clamping guide wheel mechanism 221, the rear clamping guide wheel mechanism 221 converges under the action of the second servo cylinder 222, until the bottom guide wheel set 223 and the side guide wheel set 224 are in contact with the lower edge and the side edge of the tray 31, respectively. The rear lifting tray 211 runs downward a distance under the action of the first lead screw 213, the first servo cylinder 214 and the Z-shaped structure plate 212, so that the uppermost tray 31 is separated from the other trays 31, i.e. the adjacent supporting columns 312 are separated. The rear wedge-shaped limiting block 225 precisely locks the four limiting grooves 313 of the four corners of the tray 31 under the action of the third servo cylinder 226 connected at its rear end, thereby realizing the switching of the tray 31 in the feeding station, and continuously feeding the workpieces on the tray 31 by the feeding arm 24.

[0070] Therefore, within the switching time required by the design, the feeding arm 24 can obtain a tray 31 full of workpieces at the feeding station and continue to accurately place the workpieces on the tray 31 to the mounting station. By similar reverse operation, the empty tray 31 can be placed on the lifting tray 211 for unloading, and if necessary, the empty trays 31 on the lifting tray 211 can be stacked on the feeding trolley 3.

[0071] In order to improve the switching efficiency of the feeding trolley 3, after the current tray 31 and workpieces are received by the lifting tray 211, the next feeding trolley 3 full of trays 31 and workpieces can be parked in front of the parking limiting component 20, and the limiting plate 305 of the feeding trolley 3 can lock the running wheels 301.

[0072] Therefore, by such operation, precise and efficient feeding of workpieces can be realized, and by the sequential feeding operation of the feeding mechanisms 2A, 2B and 2C, the relay assembly 12 and the mutual inductor assembly 13 can be accurately placed on the terminal assembly 11, and the three are accurately positioned by the clamp 51 for the next welding process.

[0073] Reference Figures 12-14 , the welding mechanism 4A and the welding mechanism 4B are both two groups of welding components 41, wherein the welding mechanism 4A is used for welding at the first terminal post 111 and the third terminal post 113, the welding mechanism 4B is used for welding at the second terminal post 112 and the fourth terminal post 114, and finally completes the welding operation of the terminal block assembly. The welding mechanism 4A and the welding mechanism 4B have similar structures, and the welding mechanism 4A will be taken as an example for further detailed description;

[0074] The welding mechanism includes a welding table 4, which is in a sliding connection state with the frame through a second horizontal slide rail 401. The rear end of the welding table 4 is arranged with a sixth servo cylinder 402, which is used to drive the displacement of the welding table 4 at the second horizontal slide rail 401. The front end of the welding table 4 is arranged with two groups of welding components 41 arranged in a left-right direction. The welding component 41 includes a welding seat 411 and a vertical slide rail 412. The welding seat 411 is in a sliding connection state with the welding table 4 through the vertical slide rail 412. The welding table 4 is arranged with a seventh servo cylinder 413, which is used to drive the vertical up-down displacement of the welding seat 411 at the vertical slide rail 412. The welding seat 411 is arranged with an electrode arm 414. The front end of the electrode arm 414 is provided with a welding head assembly 42. The electrode arm 412 and the welding head assembly 42 on the same side are arranged in a vertical center alignment. Therefore, the two welding head assemblies 42 can realize convergent welding operation under the action of the seventh servo cylinder 413.

[0075] In order to make the displacement more smooth and accurate, the second horizontal slide rail 401 and the vertical slide rail 412 are both dovetail slide rail structures.

[0076] The welding head assembly 42 includes a mounting block 421 and an electrode head 422. The rear end of the mounting block 421 is in a circular table 423 structure. The inside of the circular table 423 structure is in a hollow state. The electrode arm 414 is in a circular tube structure, and the inside is hollow. The front end of the electrode arm 414 can accommodate the circular table 423 structure of the mounting block 421. When the mounting block 421 is placed at the front end of the electrode arm 414 under force, it can realize the stable connection of the mounting block 421 and the electrode arm 414 similar to interference fit under the cooperation of the circular table and the inner concave wedge structure;

[0077] In order to better realize the cooling operation of resistance welding, the water inlet pipe interface 415 and the water outlet pipe interface 416 are arranged at the rear end of the electrode arm 414, the outer ends of the water inlet pipe interface 415 and the water outlet pipe interface 416 are connected with a hose, a water pump and a water tank for realizing circulating water supply, the water outlet pipe interface 416 is connected with the hollow structure in the electrode arm 414, a water guide pipe is arranged in the electrode arm 414, the rear end of the water guide pipe is connected with the water inlet pipe interface 416, the front end of the water guide pipe is open, the opening of the water guide pipe extends and is placed in the hollow part of the circular table 423 structure of the mounting block 421, when the mounting block 421 is stably connected with the electrode arm 414, the hollow structure in the mounting block 421 becomes a relatively sealed cavity structure, therefore, under the action of the hose and the water pump, the cooling water is sucked from the water tank, and is input to the hollow structure of the mounting block 421 through the water inlet pipe interface 415 and the water guide pipe, and then is discharged through the hollow structure of the electrode arm 414 and the water outlet pipe interface 416, so as to realize the circulation of the cooling water.

[0078] The side of the front end of the mounting block 421 is provided with a fixing block 424, the fixing block 424 can be connected with the mounting block 421 through bolts, the electrode head 422 can be mounted at the center alignment position of the mounting block 421 and the electrode arm 414 through the mounting structure of the fixing block 424 and the mounting block 421, the cross section of the electrode head 422 is a square structure, and the electrode head 422 is used for realizing the resistance welding operation on the workpiece.

[0079] The welding mechanism 4A and the welding mechanism 4B have similar working modes, and the actual welding operation of the feeding mechanism will be specifically described by taking the welding mechanism 4A as an example.

[0080] Under the control of the controller, the welding mechanism A and the welding mechanism B are arranged at the outer side of the indexing turntable 5, the center lines of the second horizontal sliding rails 401 of the two welding mechanisms are both directed to the center of the indexing turntable 5, the angle interval between the two is matched with the step rotation angle of the indexing turntable, in the initial state, the welding tables 4 are pushed to the welding stations by the sixth servo cylinders 402, that is, the upper and lower electrode heads 422 are in a divergent state, and the upper and lower electrode heads 422 can be aligned with the to-be-welded points in the clamps 51 carrying the workpieces.

[0081] When the indexing turntable 5 sends the workpiece into the welding station, the left and right welding components 41 drive the welding seats 411 to converge to the center in the vertical direction of the vertical sliding rails 412 through the seventh servo cylinders 413, and drive the welding seat 411, the electrode arm 414 and the welding head assembly 42 to converge, so that the upper and lower welding head assemblies 42 realize the resistance welding operation on the to-be-welded points in the workpiece.

[0082] When the welding operation is completed, the upper and lower welding head assemblies 42 are separated under the action of the seventh servo cylinder 413, and the current workpiece is sent to the next station under the operation of the indexing turntable 5, while the previous workpiece is sent to the welding station, thereby realizing continuous welding operation.

[0083] Since the electrode head 422 is used for continuous welding for a certain number of times (such as 1000 times), the surface of the electrode head 422 is easy to form a certain oxide. If the oxide is not cleaned, on the one hand, the welding quality will be reduced, and on the other hand, the oxide will occupy the height of the electrode head 422, so that the precision of the welding is reduced. Therefore, when the set number of times is reached, the indexing turntable 5 stops rotating, and the two welding machine tables 4 are displaced outward at the second horizontal slide rail 401 under the action of the sixth servo cylinder 402. If necessary, the electrode head 422 can be maintained or replaced by polishing or by disassembling and assembling the fixed block 424 in the welding head assembly 42, so that the electrode head 422 is in the best working state, and the stability and accuracy of the welding operation are greatly improved.

[0084] The discharging mechanism 6 is arranged at the last end of the welding process, and is used to take down the end button box product welded by the welding mechanism 4A and the welding mechanism 4B from the indexing turntable 5 and the clamp 51, and stack it on the tray 31, so that the current clamp 51 is in an empty state, so as to facilitate the subsequent cyclic feeding operation. The overall structure of the discharging mechanism 6 is similar to that of the feeding mechanism 4, and the working mode is the reverse operation of the feeding mechanism 4. The specific structure and working mode will not be described in detail herein.

[0085] So far, the automatic end button box welding machine of the present scheme realizes precise and efficient welding of the end button box under the control of the controller, and can continuously and efficiently weld in this way.

Claims

1. An automatic terminal box welding machine, characterized in that: the terminal box is assembled and welded by a terminal assembly, a relay assembly and a mutual inductor assembly, the terminal assembly includes a structural block and four horizontally arranged terminals, the four terminals are sequentially a first terminal, a second terminal, a third terminal and a fourth terminal from left to right, the first terminal, the second terminal, the third terminal and the fourth terminal extend beyond the outer edge of the rear end of the structural block and have smooth upper and lower surfaces in a flat structure, the relay assembly is connected with two terminals, the two terminals are sequentially a first terminal and a second terminal from left to right, the first terminal and the second terminal have smooth upper and lower surfaces, the first terminal and the second terminal can be placed at the first terminal and the second terminal, the mutual inductor assembly is arranged with two terminal blocks on both sides, the two terminal blocks are sequentially a first terminal block and a second terminal block from left to right, the first terminal block and the second terminal block have smooth upper and lower surfaces, the first terminal block and the second terminal block can be placed at the third terminal and the fourth terminal, the main material of the first terminal, the second terminal, the third terminal and the fourth terminal is red copper, and the main material of the first terminal, the second terminal, the first terminal block and the second terminal block is brass; the automatic welding machine comprises: a dividing disc, a rotating shaft, a disc motor and a speed reducer are arranged at the center of the dividing disc, a plurality of clamps are arranged in a central array on the dividing disc, and the clamps are configured to accommodate workpieces; a feeding mechanism arranged at the outer edge of the dividing disc is configured to place workpieces on the clamps; a welding mechanism arranged at the outer edge of the dividing disc is configured to weld workpieces on the clamps; the welding mechanism includes two groups of welding components, welding mechanism 4A is used for welding at the first terminal and the third terminal, and welding mechanism 4B is used for welding at the second terminal and the fourth terminal; an ejection mechanism arranged at the outer edge of the dividing disc is configured to take the finished product off the clamp; a plurality of trays are vertically stacked at the feeding mechanism, a plurality of workpieces are placed on the trays, and a feeding arm is arranged at the top of the feeding mechanism, the feeding arm places the workpieces on the clamps through multi-axis movement; the feeding mechanism includes a tray, a lifting component, a tray limiting component, a tray translation component and a feeding arm, the lifting component includes a lifting tray and a lifting plate driving mechanism, the lifting plate driving mechanism can drive the lifting tray to displace in the vertical direction, the lifting tray can carry the tray, and the tray limiting component is arranged above the lifting component; the tray has a rectangular structure and a flat bottom, limit grooves are arranged on the front and rear sides of the tray, four bearing columns are arranged at the four corners of the tray, the top and bottom of the bearing column have a male and female groove structure, and four limit grooves are arranged at the four corners of the tray; four limit holes are arranged at the four corners of the tray. Two sets of tray limiting components are arranged above the loading table, the tray limiting component includes clamping guide wheel mechanism arranged on both sides, the clamping guide wheel mechanism forms L-shaped structure, the outer side of the clamping guide wheel mechanism is provided with a second servo cylinder, the clamping guide wheel mechanism is provided with a bottom guide wheel group and a side guide wheel group, wherein the bottom guide wheel group can bear the current tray in the vertical direction, and the side guide wheel group can clamp the current tray in the horizontal direction; The outer side of the clamping guide wheel mechanism is provided with a wedge-shaped limiting block, the outer side of the wedge-shaped limiting block is provided with a servo cylinder, and the wedge-shaped limiting block can be inserted into the limiting groove of the tray; The tray translation component is arranged below the tray limiting component, which is used to switch the tray between the two tray limiting components, the tray translation component includes a translation screw rod and a fourth servo cylinder arranged on one side of the translation screw rod, a clamping arm and a clamping arm cylinder are arranged on the translation screw rod, the clamping arm is connected with a fifth servo cylinder, the fifth servo cylinder is used to drive the vertical displacement of the clamping arm, the clamping arm cylinder is used to drive the clamping operation of the clamping arm, when the clamping arm cylinder and the fifth servo cylinder drive the clamping operation of the clamping arm, the clamping arm can clamp the bearing column of the tray, and under the action of the translation screw rod and the fourth servo cylinder, the tray can be driven to move from one side to the other side of the tray limiting component, and the tray is always limited by the clamping guide wheel mechanism during displacement.

2. The endbell box automatic welding machine of claim 1, wherein: The loading arm includes X-axis slide rail and servo cylinder, Y-axis slide rail and servo cylinder and Z-axis slide rail and servo cylinder, the Z-axis slide rail is provided with a grabbing clamping arm, the Z-axis slide rail is provided with a rotating servo cylinder, and the rotating servo cylinder is configured to drive the horizontal rotation of the grabbing clamping arm.

3. The endbell box automatic welder of claim 1, wherein: The welding mechanism 4A includes a welding table, the welding table is in a sliding connection state with the framework through a horizontal slide rail, the rear end of the welding table is provided with a servo cylinder, the servo cylinder is configured to drive the displacement of the welding table at the horizontal slide rail, the front end of the welding table is provided with two groups of welding components arranged oppositely, the welding component includes a welding seat and a vertical slide rail, the welding seat is in a sliding connection state with the welding table through the vertical slide rail, the welding table is provided with a servo cylinder, the servo cylinder is configured to drive the displacement of the welding seat at the vertical slide rail, the welding seat is provided with an electrode arm, the front end of the electrode arm is provided with a welding head assembly, and the electrode arm and the welding head assembly on the same side are arranged in vertical central alignment.

4. The end bell box automatic welding machine of claim 3, wherein: The welding head assembly includes a mounting block and an electrode head, the rear end of the mounting block is in a circular table structure, and the inside is a hollow structure, the front end of the electrode arm can accommodate the circular table structure of the mounting block, and the interference fit of the mounting block and the electrode arm is realized through the cooperation of the circular table and the concave wedge structure.

5. The end bell box automatic welding machine of claim 4, wherein: The electrode arm is a circular tube structure, the inside is a hollow structure, a water guide pipe is arranged in the hollow cavity, the rear end of the electrode arm is provided with a water inlet pipe interface and a water outlet pipe interface, the water inlet pipe interface is connected with the water guide pipe, and the water outlet pipe interface penetrates the hollow cavity.

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