Positioning device for automatic feeding

Abstract

The utility model discloses an automatic feeding positioning device which comprises a pair of resistance welding pliers and a blanking positioning mechanism arranged on the resistance welding pliers, and the blanking positioning mechanism comprises a first funnel bin, a second funnel bin, a magnetic element and a spring piece; the electric resistance welding clamp comprises an electrode driving device and side plates, the upper end of the first funnel bin is connected to one side plate through a spring piece, and the upper end of the second funnel bin is connected to the other side plate through a spring piece; a telescopic rod is arranged at the driving end of the electrode driving device, a circular column head is fixedly connected to the telescopic rod, an electrode cap is fixedly connected to the lower end of the circular column head, and a material clamping cavity is formed in the electrode cap. According to the automatic material distribution mechanism, automatic material distribution is achieved, an additional material distribution mechanism is replaced, meanwhile, the reliability and stability of automatic material clamping are improved due to accurate positioning of materials falling into the storage cavity, the production efficiency is improved, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance welding feeding, and particularly relates to a positioning device for automatic feeding. Background Art

[0002] At present, the existing automatic stud welding technology for vehicle bodies has been widely used. In the existing technology, most stud welding is divided into two types: arc welding or energy storage welding, and the studs are added manually. It only takes dozens of milliseconds to complete one welding. Manual feeding cannot improve the automation production efficiency and reduce the labor cost. In the existing technology, there is also an automatic feeding method. For example, a stud welding mechanism with firm welding disclosed in CN21232997U and a stud welding gun disclosed in CN118180568A. The feeding method realizes the feeding of studs by directly inserting an inclined tube into the feeding tube or using an auxiliary channel to connect the feeding tube and the feeding port of the discharging tube. The accuracy of the discharging position and the advancing of the moving electrode of the welding tongs is not high. The impact force generated during jamming and ejection causes deformation of the discharging auxiliary module. The material cannot be vertical and is not concentric with the moving electrode, making it difficult to ensure successful feeding and welding quality.

[0003] What the applicant provides is stud resistance welding, which is different from the above-mentioned stud welding. After the electrode driving device picks up the material, it approaches and pressurizes the workpiece. The workpiece is placed on the static electrode platform connected to the welding tongs. The moving electrode pressurizes the static electrode, and a large current instantaneously causes the stud end faces of the moving and static electrodes to fuse with the workpiece to achieve connection of stud resistance welding. Since the moving electrode needs to extend and pressurize during stud resistance welding, the above-provided automatic feeding methods are not applicable and cannot meet the needs of efficient feeding production for resistance welding.

[0004] The utility model provides a positioning device for automatic feeding, which is a feeding system that integrates precise guiding and positioning for material distribution and discharging, and solves both the problems of high labor cost and low efficiency of manual feeding and the problems of complex structural design and poor feeding reliability of the existing automatic feeding technology. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the above technical problems and provide a positioning device for automatic feeding, especially applied to stud resistance welding. Its structure is simple, and it uses the robot's own control to precisely distribute materials and guide the feeding position, solving the problems of jamming and poor reliability of the existing automatic feeding technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions to implement:

[0007] A positioning device for automatic feeding, comprising a resistance welding tong and a blanking positioning mechanism arranged on the resistance welding tong. The blanking positioning mechanism comprises a first hopper bin, a second hopper bin, a magnetic element and a spring piece; the first hopper bin and the second hopper bin are arranged opposite to each other. When the first hopper bin and the second hopper bin are combined, a storage cavity is formed inside. An installation groove is arranged close to the bottom of the storage cavity, and a magnetic element is installed in the installation groove.

[0008] The resistance welding tong comprises an electrode driving device and side plates. There are two side plates, and the two side plates are respectively located on both sides of the electrode driving device. The upper end of the first hopper bin is connected to one of the side plates through a spring piece, and the upper end of the second hopper bin is connected to the other side plate through a spring piece. The spring piece provides an elastic force to make the first hopper bin and the second hopper bin approach each other; a telescopic rod is arranged at the driving end of the electrode driving device, a circular column head is fixedly connected to the telescopic rod, an electrode cap is fixedly connected to the lower end of the circular column head, a clamping cavity is formed in the electrode cap, and the electrode cap is arranged between the first hopper bin and the second hopper bin and will press against the first hopper bin and the second hopper bin when moving downward, so that the first hopper bin and the second hopper bin are separated.

[0009] Furthermore, a first semi-circular feeding port is arranged at the protruding part of the port of the first hopper bin, and a second semi-circular feeding port is arranged at the protruding part of the port of the second hopper bin. When the first semi-circular feeding port and the second semi-circular feeding port are combined, a feeding port is formed inside.

[0010] By adopting the above technical solution, through the precise guiding of the blanking positioning mechanism, when the material enters the storage cavity from the feeding port, it can fall to the bottom of the storage cavity, and the stud is attracted by the magnetic element at the bottom and keeps the stud in a vertical state, which is beneficial for the stud in the storage cavity to be inserted into the clamping cavity when the electrode driving device drives the electrode cap to move downward during the operation of the resistance welding tong, so as to ensure accurate material taking and welding quality; during the welding process, the electrode cap moves downward to contact the first hopper bin and the second hopper bin, and presses against the first hopper bin and the second hopper bin. The first hopper bin and the second hopper bin overcome the elastic force of the spring piece to separate the first hopper bin and the second hopper bin. The electrode cap continues to move downward through the open mouth separated by the lower ends of the first hopper bin and the second hopper bin and continues to move downward to weld the stud on the steel plate, so that the resistance welding tong can realize automatic clamping and welding without moving. Specifically, the electrode driving device is a combination of a servo motor and a lead screw to drive the telescopic rod to perform reciprocating telescopic motion. This is a common structure of existing resistance welding tongs and will not be elaborated here.

[0011] Furthermore, the magnetic element is any one of a circular magnet and a square magnet.

[0012] Further, the spring sheet is an elastic element, one end of the spring sheet is fastened to the side plate, and the other end of the spring sheet is fastened to the first funnel bin port or the threaded mounting hole provided on the first funnel bin. Specifically, a first threaded mounting hole is provided at the upper end of the first funnel bin, and the first funnel bin is fastened to the spring sheet via a connecting bolt on the first threaded mounting hole, and a second threaded mounting hole is provided at the upper end of the second funnel bin, and the first funnel bin is fastened to the spring sheet via a connecting bolt on the second threaded mounting hole.

[0013] Furthermore, the material clamping cavity and the storage cavity are coaxially arranged, so as to facilitate the electrode cap to accurately take out materials during movement.

[0014] Furthermore, the depth of the storage cavity is less than the height of the stud material.

[0015] Furthermore, it also includes a material distribution bracket installed on the side plate, the material distribution bracket includes a pushing guide groove and a material distribution pipe; the material distribution pipe includes an upper material distribution pipe and a lower material distribution pipe, the upper material distribution pipe is overlapped with the lower material distribution pipe, and the upper material distribution pipe and the lower material distribution pipe are not coaxial, and a material distribution guide groove opening is opened at the overlap of the upper material distribution pipe and the lower material distribution pipe, the material distribution guide groove opening is used for the stud material in the upper material distribution pipe to pass into the lower material distribution pipe, the upper material distribution pipe and the lower material distribution pipe are provided with the same pushing guide groove on one side close to the electrode driving device, the material distribution guide groove opening and the pushing guide groove are located on the same plane and are connected to each other; the lower end of the lower material distribution pipe is set as an arc material pipe and is connected to the feed port in the material unloading positioning mechanism; a pushing plate is fixedly connected to the circular column head, the pushing plate is located in the pushing guide groove and reciprocates up and down along the pushing guide groove and the material distribution guide groove opening. When in use, the stud material is located in the upper material distribution tube. When the electrode driving device drives the telescopic rod to extend and retract to drive the motor cap for welding, the push plate is driven to move up and down. When the push plate moves upward, the stud in the upper material distribution tube is pushed out to the side away from the push plate, so that the stud in the upper material distribution tube is pushed into the lower material distribution tube and slides along the lower material distribution tube into the storage cavity for the electrode cap to clamp the material.

[0016] Furthermore, the upper material distribution pipe is fixedly connected to a first fixing seat, the lower material distribution pipe is fixedly connected to a second fixing seat, and the first fixing seat and the second fixing seat are both fixedly connected to the side plate.

[0017] Furthermore, a guide camber is provided on one side of the push plate close to the upper material distribution pipe. By providing the guide camber, when the push plate moves upward, the stud material at the bottom of the upper material distribution pipe can be smoothly squeezed into the lower material distribution pipe.

[0018] The utility model provides an automatic feeding positioning device, which has the following beneficial effects:

[0019] The utility model provides a positioning device for automatic feeding. Materials can be fed through a peripheral vibrating disk or pneumatic equipment into the upper material distribution pipe. The bolt materials in the upper material distribution pipe are pushed by a pushing plate into the lower material distribution pipe and enter the blanking positioning mechanism along the lower material distribution pipe. Through the ingenious design of the blanking positioning mechanism, the materials can be accurately guided and transported to the storage cavity. At the same time, the end of the material is adsorbed by a magnetic element, ensuring the concentricity of the material and the clamping cavity, avoiding material jamming caused by non-concentricity during material taking or damage to the equipment caused by the impact force during material taking. At the same time, the first hopper bin and the second hopper bin are elastically connected to the two side plates of the welding tongs through elastic elements. During welding, when the electrode cap moves downward, the clamping cavity has taken the material. The electrode cap moves downward and contacts the first hopper bin and the second hopper bin to close, pushing open and passing between the first hopper bin and the second hopper bin to approach the workpiece for welding. When welding is completed, the electrode driving device drives the telescopic rod to retract and return to the original position. The first hopper bin and the second hopper bin are closed under the action of the elastic elements to form a storage cavity, waiting for the next material.

[0020] The utility model provides a positioning device for automatic feeding, which orderly connects a material distribution bracket and a blanking positioning mechanism from top to bottom, automatically realizes material distribution, replaces an additional material distribution mechanism, saves equipment costs. At the same time, the unique guiding angle design of the materials in the blanking positioning mechanism falling into the storage cavity enables the materials to accurately fall into the storage cavity, ensuring the concentricity of the materials and the clamping cavity to achieve accurate clamping, and improving the reliability of material taking. Through the connection of elastic elements, when a welding action is completed, the hopper bin resets to ensure the concentricity of the storage cavity and the clamping cavity, realizing automatic feeding of resistance welding studs, improving production efficiency, greatly reducing production costs, and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] The following will further describe in detail the specific embodiments of the present utility model in conjunction with the drawings:

[0023] Figure 1 Schematic diagram of the three-dimensional structure of a positioning device for automatic feeding provided by the present utility model Figure 1 。

[0024] Figure 2 Schematic diagram of the three-dimensional structure of a positioning device for automatic feeding provided by the present utility model Figure 2 。

[0025] Figure 3Schematic diagram of the three-dimensional structure of the material distribution support Figure 1 。

[0026] Figure 4 Schematic diagram of the three-dimensional structure of the material distribution support Figure 2 。

[0027] Figure 5 Schematic diagram of the structure of the material distribution guide groove opening of the material distribution support.

[0028] Figure 6 Schematic diagram of the sectional structure of the material distribution support

[0029] Figure 7 Partial sectional schematic diagram of a positioning device for automatic feeding provided by the present utility model

[0030] Figure 8 Schematic diagram of the structure of the first hopper bin in the blanking positioning mechanism

[0031] Figure 9 Schematic diagram of the structure of the second hopper bin in the blanking positioning mechanism

[0032] Figure 10 Overall schematic diagram of a positioning device for automatic feeding provided by the present utility model

[0033] Figure 11 Sectional schematic diagram of a positioning device for automatic feeding provided by the present utility model

[0034] Figure 12 Overall schematic diagram of the operating state of the present utility model

[0035] Figure 13 Partial schematic diagram of the structure of the pusher plate part

[0036] Explanation of the reference numerals in the figure: 1. Electrode driving device; 2. Material distribution support; 201. Upper material distribution pipe; 202. Lower material distribution pipe; 203. Material distribution guide groove opening; 204. Pushing guide groove; 20501. First fixed seat; 20502. Second fixed seat; 206. Arc-shaped material pipe; 3. Blanking positioning mechanism; 301. First hopper bin; 3011. First semi-circular feeding port; 302. Second hopper bin; 3021. Second semi-circular feeding port; 303. Spring piece; 304. Feeding port; 305. Storage cavity; 306. Installation groove; 3071. First threaded installation hole; 3072. Second threaded installation hole; 4. Static electrode; 401. Side plate; 402. Pusher plate; 403. Clamping cavity; 404. Circular stud; 405. Electrode cap; 6. Resistance welding pliers; 207. Stud Detailed implementation manners

[0037] It should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0039] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. The connection described can be a direct connection or an indirect connection.

[0040] A positioning device for automatic feeding includes a material distribution bracket 2, a blanking positioning mechanism 3, and a resistance welding tong 6.

[0041] As Figures 1 to 6As shown, the material distribution support 2 includes a material pushing guide groove 204 and a material distribution pipe; the material distribution pipe includes an upper material distribution pipe 201 and a lower material distribution pipe 202. The upper material distribution pipe 201 overlaps with the lower material distribution pipe 202, and the upper material distribution pipe 201 and the lower material distribution pipe 202 are not coaxial. A material distribution guide groove opening 203 is provided at the overlapping part of the upper material distribution pipe 201 and the lower material distribution pipe 202. The material distribution guide groove opening 203 is used for the stud 207 material in the upper material distribution pipe 201 to enter the lower material distribution pipe 202. On the side of the upper material distribution pipe 201 and the lower material distribution pipe 202 close to the electrode driving device 1, there is a same material pushing guide groove 204. The material distribution guide groove opening 203 and the material pushing guide groove 204 are located on the same plane and communicate with each other; the lower end of the lower material distribution pipe 202 is provided as an arc-shaped material pipe 206 and is butted with the feeding port 304 in the feeding positioning mechanism 3; a material pushing plate 402 is fixedly connected to the circular column head 404. The material pushing plate 402 is located in the material pushing guide groove 204 and reciprocates up and down along the material pushing guide groove 204 and the material distribution guide groove opening 203. In this embodiment, through the provided material pushing guide groove 204 of the material distribution support 2 and the material distribution guide groove opening 203 provided between the upper material distribution pipe 201 and the lower material distribution pipe 202, the electrode driving device 1 can drive the material pushing plate 402 to push the materials arranged from top to bottom in the upper material distribution pipe 201 into the lower material distribution pipe 202 through the material distribution guide groove opening 203, realizing the material distribution function of automatic feeding. Through a simple and ingenious design, it replaces the additional equipment to achieve the material distribution function, saving costs. A first fixing seat 20501 is fixedly connected to the upper material distribution pipe 201, and a second fixing seat 20502 is fixedly connected to the lower material distribution pipe 202. Both the first fixing seat 20501 and the second fixing seat 20502 are fixedly connected to the side plate 401. By providing the first fixing seat 20501 and the second fixing seat 20502, the material distribution support 2 can be fixed on the side plates 401 on both sides of the resistance welding tongs 6, which is easy to install and maintain.

[0042] Specifically, the stud 207 materials are conveyed into the upper material distribution pipe 201 of the material distribution support 2 and are arranged in an orderly manner from top to bottom. The end of the stud 207 material abuts against the material distribution guide groove opening 203. There is an inclined slideway matching the end of the bolt 207 near the overlapping part of the lower material distribution pipe 202 and the upper material distribution pipe 201, and its end is provided with a structure adapted to the end of the material, so that when the electrode driving device 1 drives the material pushing plate 402 to arrive, it gently pushes the stud 207 material to make the stud 207 slide from the upper material distribution pipe 201 into the lower material distribution pipe 202. In a specific embodiment, the stud 207 materials remain in the upper material distribution pipe 201 and cannot slide into the lower material distribution pipe 202 when the material pushing plate 402 does not reach the pushing position.

[0043] A guiding arc surface is provided on one side of the material pushing plate 402 close to the upper material distribution pipe 201. By providing the guiding arc surface, when the material pushing plate 402 moves upward, the stud 207 material at the bottom of the upper material distribution pipe 201 can be smoothly extruded into the lower material distribution pipe 202.

[0044] As Figures 1 to 6 shown, the stud 207 material slides into the lower material distribution pipe 202 and reaches the discharge port provided at the lower end of the lower material distribution pipe 202. A curved material pipe 206 with a curvature is provided at a section at the lower end of the lower material distribution pipe 202, and it is docked with the inlet 304 formed inside when merged with the first funnel bin 301 and the second funnel bin 302 in the blanking positioning mechanism 3, so that the stud 207 material is transported to the inlet 304 of the blanking positioning mechanism 3 through the discharge port of the material distribution bracket 2.

[0045] As Figures 7 to 10 shown, the blanking positioning mechanism 3 includes a first funnel bin 301, a second funnel bin 302, a magnetic element, and a spring piece 303; the first funnel bin 301 and the second funnel bin 302 are arranged opposite to each other. A first semi-circular inlet 3011 is provided at the protruding part of the port of the first funnel bin 301, and a second semi-circular inlet 3021 is provided at the protruding part of the port of the second funnel bin 302. When the first semi-circular inlet 3011 and the second semi-circular inlet 3021 are merged, an inlet 304 is formed inside, and the inlet 304 and the discharge port of the lower material distribution pipe 202 form a feeding channel; when the first funnel bin 301 and the second funnel bin 302 are merged, a storage cavity 305 is formed inside, and an installation groove 306 for installing the magnetic element is provided close to the bottom of the storage cavity 305. In a preferred embodiment, when the first funnel bin 301 and the second funnel bin 302 are merged, a storage cavity 305 is formed inside, which is similar to a funnel. The stud 207 material slides into the funnel bin from the inlet 304, and through the angle design of the funnel bin, the stud 207 material falls into the storage cavity 305 in a guided manner, avoiding the stud 207 material falling into the storage cavity 305 irregularly in the funnel bin. After a large number of experimental verifications, the inner wall slope angle of the funnel bin is set to be 45 degrees to 55 degrees optimally, and the stud 207 material slides into the storage cavity 305 in a guided manner according to the angle design when sliding into the funnel bin.

[0046] As Figures 7 to 10As shown, the stud 207 material slides into the storage cavity 305 at a certain slope angle, and the storage cavity 305 is tangent to the edge of the stud 207 material, ensuring that the material is perpendicular to the bottom of the storage cavity 305 when it falls into the storage cavity 305. At the same time, an installation groove 306 for installing magnetic elements is provided close to the bottom of the storage cavity 305. Installation grooves 306 are provided at the bottoms of both the first hopper bin 301 and the second hopper bin 302, and square magnets, circular magnets or semi-circular magnets can be placed. When the stud 207 material falls into the storage cavity 305, it is tightly adsorbed by the magnet, effectively ensuring the perpendicularity of the stud 207 material. The depth of the storage cavity 305 is less than the height of the stud material. When the stud material falls into the storage cavity 305, one end of it is higher than the depth of the storage cavity 305, and the clamping cavity 403 for the electrode cap 405 clamps the stud 207 material.

[0047] In a specific embodiment, the first hopper bin 301 and the second hopper bin 302 are arranged oppositely, and symmetric first threaded mounting holes 3071 and second threaded mounting holes 3072 are respectively provided at the ports of the first hopper bin 301 and the second hopper bin 302; the first threaded mounting holes 3071 and the second threaded mounting holes 3072 provided on the first hopper bin 301 and the second hopper bin 302 are fixedly connected to the two side plates 401 of the resistance welding tongs 6 through the spring piece 303. When the first hopper bin 301 and the second hopper bin 302 are combined, the formed storage cavity 305 and the clamping cavity 403 are coaxial. The stud 207 material, the bottom of the storage cavity 305, and the clamping cavity 403 are on the same axis and perpendicular, effectively ensuring the reliability of clamping and avoiding phenomena such as material jamming and failure to clamp due to eccentricity during clamping.

[0048] In the embodiment, as Figures 11 to 13As shown in the figure, the resistance welding pliers 6 include an electrode driving device 1 and side plates 401. There are two side plates 401, which are respectively located on both sides of the electrode driving device. A telescopic rod is provided at the driving end of the electrode driving device 1. A circular head 404 is fixedly connected to the telescopic rod. An electrode cap 405 is fixedly connected to the lower end of the circular head 404. A material clamping cavity 403 is formed in the electrode cap 405. The electrode cap 405 is arranged between the first hopper bin 301 and the second hopper bin 302, and when moving downward, it will press against the first hopper bin 301 and the second hopper bin 302 to separate the first hopper bin 301 and the second hopper bin 302. The radian of the circular head 404 is equal to the annular radian in the bin after the first hopper bin 301 and the second hopper bin 302 are combined. The electrode driving device 1 drives the electrode cap 405 to approach the storage cavity 305. The material clamping cavity 403 first clamps the material from the storage cavity 305 and then continues to approach the workpiece. The electrode cap 405 moves downward to contact the first hopper bin 301 and the second hopper bin 302, and presses against the first hopper bin 301 and the second hopper bin 302. The first hopper bin 301 and the second hopper bin 302 overcome the elastic force of the spring piece 303 to separate the first hopper bin 301 and the second hopper bin 302. The electrode cap 405 continues to move downward through the open mouth separated at the lower ends of the first hopper bin 301 and the second hopper bin 302 and continues to move downward to weld the stud 207 on the steel plate, so that the resistance welding pliers 6 can realize automatic material clamping and welding without moving; after the electrode cap 405 continues to move downward through the first hopper bin 301 and the second hopper bin 302, the circular head 404 abuts against the annular radian of the hopper bin, and continues to squeeze to keep the first hopper bin 301 and the second hopper bin 302 in a separated state, effectively ensuring that the first hopper bin 301 and the second hopper bin 302 open symmetrically during the opening process. Since the storage cavity 305 formed when the first hopper bin 301 and the second hopper bin 302 are combined is coaxial with the material clamping cavity 403, and is elastically connected by the spring piece 303 to make both sides open symmetrically when opening, the electrode cap 405 passes through the middle and applies pressure and power to the workpiece placed on the static electrode 4 to realize welding.

[0049] In the embodiment, after welding is completed, the electrode driving device 1 drives the electrode cap 405 to return to the position waiting for welding. The stud 207 material is welded on the workpiece, and the stud 207 material disengages from the material clamping cavity 403. When the electrode cap 405 returns to the position waiting for welding, the first hopper bin 301 and the second hopper bin 302 slowly merge from the open state. The magnets in the mounting grooves 306 at the lower ends of the first hopper bin 301 and the second hopper bin 302 attract each other. The storage cavity 305 after the first hopper bin 301 and the second hopper bin 302 are combined still remains on the same axis as the material clamping cavity 403, effectively ensuring the falling of the next material. The electrode driving device 1 drives the pusher plate 402 to realize the feeding of the next material, realizing a fully automated feeding process.

[0050] In an embodiment, a square magnet, a circular magnet or other magnetic elements with adsorption can be installed in the installation groove 306. Alternatively, multiple groups of magnetic elements can be arranged at the bottom of the storage cavity 305 according to the method provided by the present utility model to achieve the mutual adsorption function, thereby realizing the positioning function for the first hopper bin 301 and the second hopper bin 302 to return to their original states. This will not be elaborated in this embodiment.

[0051] The stud 207 material is conveyed to the upper distribution pipe 201. The electrode driving device drives the pushing plate 402 to push the stud 207 material in the upper distribution pipe 201 into the cavity of the lower distribution pipe 202. The stud 207 material is conveyed to the inlet 304 of the hopper bin through the outlet of the lower distribution pipe 202. Through the ingenious design and precise guidance of the hopper bin, the stud 207 material is conveyed to the bottom of the hopper bin. The magnetic elements provided at the bottom of the hopper bin adsorb and position the end of the material, making the stud 207 material coaxial with the clamping cavity 403. The electrode cap 405 is driven towards the workpiece. The clamping cavity 403 clamps the stud 207 material and pushes open the hopper bin to weld the stud 207 material onto the workpiece. After welding is completed, the electrode cap 405 is driven back to the position for waiting for welding. The stud 207 material disengages from the clamping cavity 403. With the return of the electrode driving device, under the action of the elastic driving force, the hopper bin gradually returns to its original state, and the magnetic elements on both sides attract each other to close the hopper bin, preparing for the conveyance of the next material.

[0052] The parts not involved in this technical solution can be implemented by using the existing technologies.

[0053] The foregoing has shown and described the basic principles, main features and characteristics of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model includes the appended claims and their equivalents.

Claims

1. A positioning device for automatic feeding, characterized in that: The invention comprises a resistance welding clamp (6) and a material unloading positioning mechanism (3) arranged on the resistance welding clamp (6), wherein the material unloading positioning mechanism (3) comprises a first funnel bin (301), a second funnel bin (302), a magnetic element and a spring sheet (303); the first funnel bin (301) and the second funnel bin (302) are arranged opposite to each other, and when the first funnel bin (301) and the second funnel bin (302) are combined, a storage cavity (305) is formed therein, and a mounting groove (306) is arranged close to the bottom of the storage cavity (305), and a magnetic element is installed in the mounting groove (306); The resistance welding clamp (6) comprises an electrode driving device (1) and a side plate (401), wherein two side plates (401) are provided and the two side plates (401) are respectively located on both sides of the electrode driving device, the upper end of the first funnel bin (301) is connected to one of the side plates (401) via a spring sheet (303), and the upper end of the second funnel bin (302) is connected to the other side plate (401) via a spring sheet (303), and the spring sheet (303) provides elastic force to make the first funnel bin (301) and the second funnel bin (302) move closer to each other. The driving end of the electrode driving device (1) is provided with a telescopic rod, a circular column head (404) is fixedly connected to the telescopic rod, the lower end of the circular column head (404) is fixedly connected to an electrode cap (405), a material clamping cavity (403) is provided in the electrode cap (405), and the electrode cap (405) is arranged between the first funnel bin (301) and the second funnel bin (302) and presses the first funnel bin (301) and the second funnel bin (302) when moving downward, so that the first funnel bin (301) and the second funnel bin (302) are separated.

2. The automatic feeding positioning device according to claim 1, characterized in that: The protruding portion of the port of the first funnel bin (301) is provided with a first semicircular feed opening (3011), and the protruding portion of the port of the second funnel bin (302) is provided with a second semicircular feed opening (3021); when the first semicircular feed opening (3011) and the second semicircular feed opening (3021) are combined, a feed opening (304) is formed inside them.

3. The automatic feeding positioning device according to claim 1, characterized in that: The magnetic element is any one of a circular magnet and a square magnet.

4. The automatic feeding positioning device according to claim 1, characterized in that: The spring sheet (303) is an elastic element, one end of the spring sheet (303) is fastened to the side plate (401), and the other end of the spring sheet (303) is fastened to the port of the first funnel bin (301) or a threaded mounting hole provided on the first funnel bin (301).

5. The automatic feeding positioning device according to claim 1, characterized in that: The material clamping cavity (403) and the storage cavity (305) are coaxially arranged.

6. The automatic feeding positioning device according to claim 1, characterized in that: The depth of the storage cavity (305) is less than the height of the material of the stud (207).

7. An automatic feeding positioning device according to any one of claims 2 to 6, characterized in that: The utility model also comprises a material distribution bracket (2) installed on the side plate (401), the material distribution bracket (2) comprises a material pushing guide groove (204) and a material distribution pipe; the material distribution pipe comprises an upper material distribution pipe (201) and a lower material distribution pipe (202), the upper material distribution pipe (201) and the lower material distribution pipe (202) are overlapped, and the upper material distribution pipe (201) and the lower material distribution pipe (202) are not coaxial, and a material distribution guide groove opening (203) is provided at the overlap between the upper material distribution pipe (201) and the lower material distribution pipe (202), and the material distribution guide groove opening (203) is used for the material of the stud (207) in the upper material distribution pipe (201) to pass into the lower material distribution pipe (202), and the upper material distribution pipe (201) and the lower material distribution pipe (202) are overlapped. The same material pushing guide groove (204) is provided on one side of the material distribution pipe (201) and the lower material distribution pipe (202) close to the electrode driving device (1); the material distribution guide groove opening (203) and the material pushing guide groove (204) are located on the same plane and are interconnected; the lower end of the lower material distribution pipe (202) is configured as an arc-shaped material pipe (206) and is connected to the material inlet (304) in the material unloading positioning mechanism (3); a material pushing plate (402) is fixedly connected to the circular column head (404); the material pushing plate (402) is located in the material pushing guide groove (204) and reciprocates up and down along the material pushing guide groove (204) and the material distribution guide groove opening (203).

8. The automatic feeding positioning device according to claim 7, characterized in that: The upper material distribution pipe (201) is fixedly connected to a first fixed seat (20501), and the lower material distribution pipe (202) is fixedly connected to a second fixed seat (20502), and the first fixed seat (20501) and the second fixed seat (20502) are both fixedly connected to the side plate (401).

9. The automatic feeding positioning device according to claim 8, characterized in that: A guide arc surface is provided on one side of the push plate (402) close to the upper material distribution pipe (201).

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