Multi-nut one-time welding machine

Abstract

The utility model relates to a multi-nut one-time welding machine which is provided with a machine frame, a welding power source is arranged in the machine frame, a lower electrode base is arranged on the lower portion of the machine frame, and an upper electrode base is arranged on the upper portion of the machine frame. The lower electrode holder is provided with a lower conductor which is connected and conducted with an electrode of a welding power supply; a plurality of conductive supporting tables are arranged at the top of the lower conductor; a plurality of sets of mutually independent upper electrode assemblies are arranged on the upper electrode seat and the mounting bracket; the upper electrode assembly is provided with a vertically downward conductive voltage column; the upper portion of the conductive pressing column is connected with an upper electric conductor, and a pressing driving element is installed above the upper electric conductor. The upper conductor is connected with a conductive contact, and a conductive driving element is mounted at the top of the conductive contact; and a conductive plate is arranged below the conductive contact. According to the utility model, the plurality of nuts are simultaneously fixed on the sheet metal part by utilizing the conductive pressing columns, then the conductive driving elements act in sequence, and the conductive pressing columns above the plurality of nuts are electrified in sequence by utilizing one welding power supply, so that the welding is realized.

Description

Technical Field

[0001] The utility model relates to a welding machine which can realize one-time welding of multiple nut products and belongs to the field of welding machine equipment. Background Art

[0002] Sheet metal parts often need to be welded with nuts to form finished products for use according to the needs of use; with the development of welding technology, automatic welding machines are often used in conjunction with loading and unloading equipment to install nuts on sheet metal parts and then weld them. For example, the automatic welding device for welding nuts with Chinese patent publication number CN109079305A and the automatic welding equipment for nuts with Chinese patent publication number CN111195796A.

[0003] This type of welding equipment is generally modified from an existing welding machine combined with automatic conveying equipment; the welding machine only has one welding head, which means that when more than two nuts need to be welded simultaneously on certain sheet metal parts, multiple clamping is often required, or multiple welding machines are used to work in conjunction to complete a complete set of nut welding operations.

[0004] In view of the needs of multi-nut welding, the existing production process is relatively complex, or the automated production equipment is relatively large, the equipment purchase cost is high, and the production efficiency is also low. Therefore, it is necessary to make corresponding improvements in order to reduce the equipment manufacturing cost and improve the production efficiency. Utility Model Content

[0005] The utility model aims to provide a multi-nut one-time welding machine, which has multiple independent welding heads, which are pressed at the same time and then powered on one by one to perform welding operations, thereby realizing the needs of clamping multiple nuts at one time and completing welding at one time, and significantly improving production efficiency; and the power requirement of the welding power supply remains unchanged, and the equipment manufacturing cost is low; at the same time, different production needs can be met by replacing the welding seat, the maintenance cost in the production process is low, and the adjustment is flexible.

[0006] In order to achieve the above-mentioned utility model object, the utility model provides a multi-nut one-time welding machine, which is provided with a frame, a welding power supply is provided in the frame, a lower electrode seat is provided at the lower part of the frame, and an upper electrode seat is provided at the upper part of the frame;

[0007] The lower electrode holder has a lower conductor, which is connected to the electrode of the welding power source for conduction;

[0008] A plurality of conductive support platforms are provided on the top of the lower conductor;

[0009] The upper electrode seat has a mounting bracket; the mounting bracket is provided with a plurality of sets of upper electrode assemblies which are independent of each other;

[0010] The upper electrode assembly has a vertically downward conductive voltage column, the conductive voltage column matches the position of the conductive support platform, and there is a conductive voltage column directly above each conductive support platform;

[0011] The upper part of the conductive voltage column is connected to an upper conductor, and a clamping driving element is installed above the upper conductor; the clamping driving element is actuated to drive the upper conductor and the conductive voltage column to move up and down;

[0012] The upper conductor is connected to a conductive contact through a flexible conductive belt, and a conductive driving element is installed on the top of the conductive contact;

[0013] A conductive plate is provided below the conductive contact, and the conductive plate has a power receiving plane parallel to the conductive contact;

[0014] The conductive plates of several upper electrode assemblies are simultaneously fixed on a distribution board, and the distribution board is connected to the electrodes of the welding power source;

[0015] The conductive driving element moves, driving the conductive contact to move up and down;

[0016] When the conductive contact rises, the conductive contact is separated from the power receiving plane of the conductive plate, i.e. disconnected;

[0017] When the conductive contact is lowered, it contacts the power receiving plane of the conductive plate to form electrical conduction; at this time, the electrode of the welding power supply is connected to the conductive voltage column through the distribution board, conductive plate, conductive contact, flexible conductive belt, upper conductor, and finally.

[0018] As a further improvement of the utility model, a platform is provided on the lower conductor, and a mounting hole for mounting and fixing the lower conductor is provided on the platform.

[0019] As a further improvement of the utility model, a positioning column is protruded from the conductive support platform.

[0020] As a further improvement of the utility model, the pressing driving element is a cylinder, the cylinder body of the cylinder is fixed on the top of the mounting bracket, and the piston rod of the cylinder is downwardly connected to the upper conductor.

[0021] As a further improvement of the utility model, the conductive voltage column is located on one side of the upper conductor;

[0022] Several conductive columns are gathered in the middle and isolated from each other;

[0023] The upper conductors are dispersedly arranged from the middle to the outside, and the pressing driving elements above the upper conductors are independent of each other.

[0024] As a further improvement of the utility model, a linear guide element is provided between the upper conductor and the mounting bracket.

[0025] Furthermore, the linear guide element is a linear guide rail, a slider of which is mounted on the upper conductor, and the guide rail is fixed on the mounting bracket.

[0026] As a further improvement of the utility model, the conductive driving element is a cylinder, the cylinder body of the cylinder is fixed on the mounting bracket, and the piston rod of the cylinder is connected downwardly with a conductive contact.

[0027] As a further improvement of the utility model, the flexible conductive tape is a wire, or a copper foil soft connecting tape.

[0028] As a further improvement of the utility model, a distance measuring sensor for measuring the descending distance of the upper conductor is provided on the mounting bracket.

[0029] When the multi-nut one-time welding machine of the utility model is working, the sheet metal parts and nuts to be welded are first placed on the conductive support platform of the lower conductor, and the assembly is completed, and they are positioned by the positioning column and transported to the welding area of ​​the multi-nut one-time welding machine of the utility model, and the lower conductor is connected to the electrode of the welding power supply.

[0030] Subsequently, the clamping driving elements work simultaneously, causing the upper conductors and conductive voltage columns of several groups of upper electrode assemblies to drop simultaneously, and the bottom of the conductive voltage column is pressed on the top surface of the nut, pressing the nut and the sheet metal on the conductive support platform, forming a welding area between the conductive voltage column and the conductive support platform.

[0031] Afterwards, several conductive driving elements are operated in sequence, so that the conductive contacts in several groups of upper electrode assemblies are contacted with the power receiving plane of the conductive plate in sequence. When the conductive contacts in the group of upper electrode assemblies are in contact with the power receiving plane of the conductive plate, the conductive voltage column in the group of upper electrode assemblies is connected with the electrode of the welding power source, and then the nut pressed by the conductive voltage column is heated and welded with the sheet metal in this area; after welding continues for several seconds, the conductive driving element in the group of upper electrode assemblies drives the conductive contact to rise, so that it is disengaged from the power receiving plane of the conductive plate, and the welding stops, completing the welding of the nut on the sheet metal; then, the conductive driving element in the next group of upper electrode assemblies is operated, driving the conductive contact to descend, so that the conductive contact is in contact with the power receiving plane of the conductive plate, and the nut pressed by the conductive voltage column in the next group of upper electrode assemblies is welded; until all the nuts are welded, the pressing driving element drives the upper conductor and the conductive voltage column to rise completely, the sheet metal is in a free state and can be taken away, and the multi-nut one-time welding machine of the utility model waits for the next group of sheet metal and nuts to be welded.

[0032] The multi-nut one-time welding machine of the utility model uses a plurality of upper electrode assemblies that operate independently to simultaneously fix a plurality of nuts on a sheet metal part using a conductive voltage column, and then the conductive driving element is operated in sequence, and a welding power source is used to energize the conductive voltage columns above the plurality of nuts in sequence to achieve welding. That is, the multi-nut one-time welding machine of the utility model realizes one machine, one clamping, and one-time welding, and the requirements for the welding power source are the same as those for welding a single nut, and no additional power is required.

[0033] The multi-nut one-time welding machine of the utility model can design and replace the lower electrode seat and the upper electrode seat separately according to welding needs, so that the multi-nut one-time welding machine of the utility model can meet the needs of different welding products.

[0034] The multi-nut one-time welding machine of the utility model has a simple structure and is easy to manufacture. It can be combined with automatic pick-and-place equipment to realize the welding of multiple nuts on sheet metal parts, thereby reducing equipment space and equipment investment costs, and can be flexibly adjusted according to product changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the multi-nut one-time welding machine of the utility model;

[0036] Figure 2 Schematic diagram of the overall structure of the lower electrode holder;

[0037] Figure 3 Schematic diagram of the working state of the lower electrode holder;

[0038] Figure 4 Schematic diagram of the overall structure of the upper electrode holder Figure 1 ;

[0039] Figure 5 Schematic diagram of the overall structure of the upper electrode holder Figure 2 ;

[0040] Figure 6 Schematic diagram of the overall structure of the upper electrode holder Figure 3 ;

[0041] Figure 7 Schematic diagram of the overall structure of the upper electrode assembly Figure 1 ;

[0042] Figure 8 Schematic diagram of the overall structure of the upper electrode assembly Figure 2 ;

[0043] Fig. 9 Schematic diagram of the overall structure of the upper electrode assembly Figure 3 . DETAILED DESCRIPTION

[0044] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0045] The overall structure of the multi-nut one-time welding machine of the utility model is as follows Figure 1 As shown, the whole is similar to a conventional welding machine, and is provided with a frame 1, a welding power supply is arranged in the frame 1, a lower electrode holder 11 is arranged at the lower part of the frame 1, a lower electrode body is arranged upwardly from the lower electrode holder 11, and the lower electrode body is connected to one pole of the welding power supply; an upper electrode holder 12 is arranged at the upper part of the frame 1, an upper electrode body is arranged downwardly from the upper electrode holder 12, and the upper electrode body is connected to the other pole of the welding power supply; the nut and sheet metal to be welded are assembled and placed on the lower electrode holder 11, and the nut position is in contact with the lower electrode body, and the upper electrode body of the upper electrode holder 12 is pressed down and in contact with the nut position, so as to realize the conduction of the welding power supply and generate a large current, so that a large amount of heat is generated in the contact area between the nut and the sheet metal, and welding is realized.

[0046] The multi-nut one-time welding machine of the utility model mainly improves the structures of the lower electrode seat 11 and the upper electrode seat 12.

[0047] The lower electrode holder 11 is as follows Figure 2 , Figure 3 As shown, there is a lower conductor 2, which can be connected to the electrode of the welding power supply for conduction; a platform 21 is provided on the lower conductor 2, and a mounting hole is provided on the platform 21 for mounting and fixing the lower conductor 2; a plurality of conductive support platforms 22 are provided on the top of the lower conductor 2, and the number and height of the conductive support platforms 22 match the welding positions of the nuts B on the sheet metal A to be welded. As shown in the figure, three nuts B need to be welded and fixed on the sheet metal A, and the welding positions of the nuts B on the sheet metal A are in the same plane, so three conductive support platforms 22 are provided with the same height, and each nut B has a conductive support platform 22 below; further, a positioning column 23 is provided on the protrusion of the conductive support platform 22. When the sheet metal A is placed on the conductive support platform 22, the through hole on the sheet metal A is sleeved on the positioning column 23 for positioning, and the inner hole of the nut B to be welded is also sleeved on the positioning column 23 for positioning.

[0048] The upper electrode holder 12 is as follows Figure 4 , Figure 5 , Figure 6 As shown, there is a mounting bracket, which can be conveniently and quickly installed on the frame 1 as a whole; the mounting bracket is provided with a plurality of sets of upper electrode assemblies 3 that are independent of each other according to the number of nuts B to be welded.

[0049] The upper electrode assembly 3 is further as Figure 7 , Figure 8 , Fig. 9As shown, there is a vertically downward conductive voltage column 31, which matches the position of the conductive support platform 22, and there is a conductive voltage column 31 directly above each conductive support platform 22; the upper part of the conductive voltage column 31 is connected to the upper conductor 32, and a clamping drive element 33 is installed above the upper conductor 32. The clamping drive element is preferably a cylinder, the cylinder body of the cylinder is fixed to the top of the mounting bracket, and the piston rod of the cylinder is downwardly connected to the upper conductor 32, and then the clamping drive element 33 is actuated to drive the upper conductor 32 and the conductive voltage column 31 to move up and down.

[0050] The nuts B to be welded on the sheet metal part A are generally concentrated in a smaller area, so the conductive voltage column 31 is located on one side of the upper conductor 32, and several conductive voltage columns 31 are gathered in the middle and isolated from each other, while the upper conductor 32 is dispersed from the middle to the outside so that the corresponding clamping drive elements 33 can be arranged.

[0051] Since the conductive voltage column 31 is located on one side of the upper conductor 32, and the conductive voltage column 31 needs to transmit the pressure generated by the pressing driving element 33 during operation, a linear guide element 34 is provided between the upper conductor 32 and the mounting bracket to ensure that the conductive voltage column 31 and the upper conductor 32 can maintain linear motion under the drive of the pressing driving element 33. The linear guide element 34 is a linear guide rail, whose slider is mounted on the upper conductor 32, and the slide rail is fixed on the mounting bracket.

[0052] The side of the upper conductor 32 away from the conductive voltage column 31 is connected to a conductive contact 35 through a flexible conductive belt 36. A conductive driving element 37 is installed on the top of the conductive contact 35. The conductive driving element 37 is preferably a cylinder. The cylinder body of the cylinder is fixed on the mounting bracket, and the piston rod of the cylinder is downwardly connected to the conductive contact 35; the flexible conductive belt 36 is a wire, or a copper foil soft connecting belt, so that when the upper conductor 32 is driven to rise and fall by the compression driving element 33, it will not affect the height position of the conductive contact 35.

[0053] A conductive plate 38 is provided below the conductive contact 35, and the conductive plate 38 has a power receiving plane parallel to the conductive contact 35; the conductive plates 38 of several upper electrode assemblies 3 are fixed on the distribution board 13 at the same time, and the distribution board 13 is connected to the electrode of the welding power source. In this embodiment, three conductive plates 38 are connected to the distribution board 13 at the same time.

[0054] The conductive driving element 37 works to drive the conductive contact 35 to rise and fall. When the conductive contact 35 rises, it is separated from the power receiving plane of the conductive plate 38, i.e., disconnected. When the conductive contact 35 drops, it contacts the power receiving plane of the conductive plate 38 to form electrical conduction. At this time, the electrodes of the welding power supply are connected to the conductive voltage column 31 via the distribution board 13, the conductive plate 38, the conductive contact 35, the flexible conductive belt 36, and the upper conductor 32.

[0055] Further, such as Fig. 9 As shown, a distance sensor 39 is provided on the mounting bracket. The distance sensor used in the utility model is a wire sensor. The main body of the distance sensor 39 is fixed on the mounting bracket, and the wire end of the distance sensor 39 is fixed on the side of the upper conductor 32, or fixed on the upper conductor 32 through an adapter frame; the distance sensor 39 can measure the descending distance of the upper conductor 32, thereby ensuring that the conductive voltage column 31 presses the nut B onto the sheet metal A and the conductive support platform 22.

[0056] When the multi-nut one-time welding machine of the present invention is working, the sheet metal A and nut B to be welded are first placed on the conductive support platform 22 of the lower conductor 2, and the assembly is completed. They are positioned by the positioning column 23 and transported to the welding area of ​​the multi-nut one-time welding machine of the present invention, and the lower conductor 2 is connected to the electrode of the welding power supply; then, the pressing driving element 33 works at the same time, so that the upper conductor 32 and the conductive voltage column 31 of several groups of upper electrode assemblies 3 are lowered at the same time, and the bottom of the conductive voltage column 31 is pressed on the top surface of the nut B, so that the nut B and the sheet metal A are pressed on the conductive support platform 22, and a welding area is formed between the conductive voltage column 31 and the conductive support platform 22; thereafter, several conductive driving elements 37 are operated in sequence, so that the conductive contacts 35 in several groups of upper electrode assemblies 3 are contacted with the power receiving plane of the conductive plate 38 in sequence. When the conductive contacts 35 in the group of upper electrode assemblies 3 are in contact with the power receiving plane of the conductive plate 38, the group The conductive voltage column 31 in the upper electrode assembly 3 is connected to the electrode of the welding power supply, and then the nut B pressed by the conductive voltage column 31 and the area of ​​the sheet metal A are heated and welded; after welding continues for several seconds, the conductive driving element 37 in the group of upper electrode assemblies 3 drives the conductive contact 35 to rise, so that it is disengaged from the power receiving plane of the conductive plate 38, and the welding stops, completing the welding of the nut B on the sheet metal A; then, the conductive driving element 37 in the next group of upper electrode assemblies 3 is actuated, driving the conductive contact 35 to descend, so that the conductive contact 35 contacts the power receiving plane of the conductive plate 38, and the nut B pressed by the conductive voltage column 31 in the next group of upper electrode assemblies 3 is welded; until all the nuts B are welded, the clamping driving element 33 drives the upper conductor 32 and the conductive voltage column 31 to rise completely, and the sheet metal A is in a free state and can be taken away, and the multi-nut one-time welding machine of the utility model waits for the next group of sheet metal A and nuts B to be welded.

[0057] The multi-nut one-time welding machine of the utility model uses a plurality of independently operated upper electrode assemblies 3 to simultaneously fix a plurality of nuts B on a sheet metal part A using a conductive voltage column 31, and then the conductive driving element 37 is sequentially operated, and a welding power source is used to sequentially energize the conductive voltage columns 31 above the plurality of nuts B to achieve welding. That is, the multi-nut one-time welding machine of the utility model realizes one machine, one clamping, and one-time welding, and the requirements for the welding power source are consistent with those for welding a single nut B, and no additional power is required.

[0058] The multi-nut disposable welding machine of the utility model can design and replace the lower electrode holder 11 and the upper electrode holder 12 separately according to welding requirements, so that the multi-nut disposable welding machine of the utility model can meet the requirements of different welding products.

[0059] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all within the scope defined by the claims of this application.

Claims

1. Multi-nut one-time welding machine, characterized in that: A frame is provided, a welding power source is provided in the frame, a lower electrode seat is provided at the bottom of the frame, and an upper electrode seat is provided at the top of the frame; The lower electrode holder has a lower conductor, which is connected to the electrode of the welding power source for conduction; A plurality of conductive support platforms are provided on the top of the lower conductor; The upper electrode seat has a mounting bracket; the mounting bracket is provided with a plurality of sets of upper electrode assemblies which are independent of each other; The upper electrode assembly has a vertically downward conductive voltage column, the conductive voltage column matches the position of the conductive support platform, and there is a conductive voltage column directly above each conductive support platform; The upper part of the conductive voltage column is connected to an upper conductor, and a clamping driving element is installed above the upper conductor; the clamping driving element is actuated to drive the upper conductor and the conductive voltage column to move up and down; The upper conductor is connected to a conductive contact through a flexible conductive belt, and a conductive driving element is installed on the top of the conductive contact; A conductive plate is provided below the conductive contact, and the conductive plate has a power receiving plane parallel to the conductive contact; The conductive plates of several upper electrode assemblies are simultaneously fixed on a distribution board, and the distribution board is connected to the electrodes of the welding power source; The conductive driving element moves, driving the conductive contact to move up and down; When the conductive contact rises, the conductive contact is separated from the power receiving plane of the conductive plate, i.e. disconnected; When the conductive contact is lowered, it contacts the power receiving plane of the conductive plate to form electrical conduction; at this time, the electrode of the welding power supply is connected to the conductive voltage column through the distribution board, conductive plate, conductive contact, flexible conductive belt, upper conductor, and finally.

2. The multi-nut one-time welding machine according to claim 1, characterized in that: A platform is arranged on the lower conductor, and a mounting hole for mounting and fixing the lower conductor is arranged on the platform.

3. The multi-nut one-time welding machine according to claim 1, characterized in that: A positioning column is protruded from the conductive support platform.

4. The multi-nut one-time welding machine according to claim 1, characterized in that: The pressing driving element is a cylinder, a cylinder body of the cylinder is fixed on the top of the mounting bracket, and a piston rod of the cylinder is downwardly connected to an upper conductor.

5. The multi-nut one-time welding machine according to claim 1, characterized in that: The conductive voltage column is located on one side of the upper conductive body; Several conductive columns are gathered in the middle and isolated from each other; The upper conductors are dispersedly arranged from the middle to the outside, and the pressing driving elements above the upper conductors are independent of each other.

6. The multi-nut one-time welding machine according to claim 1 or 5, characterized in that: A linear guide element is arranged between the upper conductor and the mounting bracket.

7. The multi-nut one-time welding machine according to claim 6, characterized in that: The linear guide element is a linear guide rail, a slider of which is mounted on the upper conductor, and the slide rail is fixed on the mounting bracket.

8. The multi-nut one-time welding machine according to claim 1, characterized in that: The conductive driving element is a cylinder, a cylinder body of the cylinder is fixed on a mounting bracket, and a piston rod of the cylinder is downwardly connected with a conductive contact.

9. The multi-nut one-time welding machine according to claim 1, characterized in that: The flexible conductive tape is a conductor or a copper foil soft connecting tape.

10. The multi-nut one-time welding machine according to claim 1, characterized in that: A distance measuring sensor for measuring the descending distance of the upper conductor is arranged on the mounting bracket.

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