Electrode life protection mechanism for resistance welding

Abstract

The utility model discloses an electrode life protection mechanism for resistance welding, which comprises a welding device and electrode protection mechanisms arranged on the two sides of the welding device, the welding device comprises a base which is horizontally arranged and connected with a rack, the welding device is connected with the base through a vertically arranged connecting plate, and the electrode protection mechanisms are arranged on the two sides of the welding device. An upper welding electrode and a lower welding electrode which are oppositely arranged in the height direction are arranged below the welding device, the electrode protection mechanism comprises copper strip winding wheels symmetrically arranged on the two sides of the welding device, roller supporting plates are arranged on the sides, close to the welding device, of the copper strip winding wheels, and a process protection belt is wound around the copper strip winding wheels. And the process protection belt is arranged between the upper welding electrode and the lower welding electrode through a positioning roller mounted on the roller supporting plate. According to the protective belt, a dirty process welding belt moves in the welding process, a new contact surface is welded in place, a welding electrode is prevented from being polluted, the electrode is prevented from being adhered by a lug and a pole to be welded, and energy consumption in the whole welding process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance welding, in particular to a life protection mechanism for electrodes used in resistance welding. Background Art

[0002] Electrode wear is a very important variable in resistance welding. After a certain number of welds, the electrode begins to wear, which increases the resistance between the electrode and the workpiece. Based on the increase in resistance, the thermal and mechanical properties will have very large changes, which will have an adverse effect on the quality of the weld. For steel resistance welding, the frequency of electrode cleaning is about 200 to 400 welds, and for aluminum, it is about 25 to 100 welds. For traditional resistance welding, the entire production cycle will be extended by the electrode cleaning time.

[0003] In order to protect the spot welding electrode from contamination or prevent the electrode from being adhered to the pole lug to be welded, a strip of metal film is currently inserted between the electrode and the workpiece manually, which is inefficient, poses a safety hazard, and is not suitable for mass production. Utility Model Content

[0004] In order to solve the above technical problems, a life protection mechanism for resistance welding electrodes is provided.

[0005] To achieve the above-mentioned purpose, the utility model discloses an electrode life protection mechanism for resistance welding, including a welding device and an electrode protection mechanism arranged on both sides of the welding device, the welding device including a base arranged horizontally and connected to a frame, the welding device is connected to the base through a vertically arranged connecting plate, an upper welding electrode and a lower welding electrode arranged opposite to each other in a height direction are arranged below the welding device, a control system is arranged on the base behind the welding device, a pressurizing device is connected to the top of the welding device, the electrode protection mechanism includes copper strip winding wheels symmetrically arranged on both sides of the welding device, a roller support plate is arranged on the side of the copper strip winding wheel close to the welding device, a process protection belt is wound on the copper strip winding wheel, and the process protection belt is arranged between the upper welding electrode and the lower welding electrode through a positioning roller installed on the roller support plate.

[0006] Furthermore, both sides of the copper strip winding wheel are installed on a winding wheel mounting plate connected to the welding device through a bearing seat and a positioning block. The winding wheel mounting plate is L-shaped, and the copper strip winding wheel on the right is the driving wheel, and the one on the left is the driven wheel.

[0007] Furthermore, a winding motor is arranged at one end of the winding wheel mounting plate away from the driving wheel. The winding motor is fixed on the motor mounting plate connected to the welding device. The output end of the winding motor is connected to the connecting rod of the driving wheel through a coupling.

[0008] Furthermore, a magnetic powder brake is provided at one end of the winding wheel mounting plate away from the driven wheel, the magnetic powder brake is fixed on the brake mounting plate connected to the welding device, and the output end of the magnetic powder brake is connected to the connecting rod of the driven wheel through a coupling.

[0009] Furthermore, the inner side of the roller support plate is connected to the welding device through a welding machine pad, and at least two bending sections are provided on the roller support plate. The positioning rollers are movably installed on the bottom of the roller support plate and at the bending position of the roller support plate close to the copper strip winding wheel.

[0010] Furthermore, the positioning roller is in an I-shaped structure, and a connecting shaft that is clamped in a roller support plate is movably provided on the end surface of the positioning roller, and a top cover connected to the roller support plate is provided at the bottom of the connecting shaft.

[0011] Furthermore, the upper welding electrode is installed on the bottom of the welding device, and the lower welding electrode is installed on the base.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the utility model discloses an electrode life protection mechanism for resistance welding, in which a metal strip is used as a protection strip for the welding electrode. During the welding process, the dirty process welding strip is moved and a new contact surface is put in place for welding, thereby avoiding contamination of the welding electrode and preventing the electrode from being adhered to the pole ear and pole to be welded. There is no need to clean the welding electrode, thereby reducing the energy consumption of the entire welding process and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is the front view of the utility model.

[0015] Figure 2 This is a schematic diagram of the electrode protection mechanism of the present utility model.

[0016] Figure 3 This is a schematic diagram of the installation position of the positioning roller of the utility model.

[0017] Figure 4 This is a bottom view of the positioning roller of the utility model.

[0018] In the figure: 1 is a base; 2 is a welding device; 3 is a control system; 4 is an electrode protection mechanism; 41 is a copper strip reel; 42 is a reel mounting plate; 43 is a reel motor; 44 is a motor mounting plate; 45 is a coupling; 46 is a magnetic powder brake; 461 is a brake mounting plate; 47 is a roller support plate; 471 is a top cover; 48 is a welding machine pad; 49 is a positioning roller; 491 is a connecting shaft; 5 is a pressurizing device; 6 is an upper welding electrode; 7 is a lower welding electrode; 8 is a process protection belt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0020] An embodiment of the utility model, as Figure 1 and Figure 2 As shown, the welding device 2 includes a base 1 that is horizontally arranged and connected to the frame, the welding device 2 is connected to the base 1 through a vertically arranged connecting plate, an upper welding electrode 6 and a lower welding electrode 7 that are relatively arranged in the height direction are arranged below the welding device 2, a control system 3 is arranged on the base 1 behind the welding device 2, a pressurizing device 5 is connected to the top of the welding device 2, and the electrode protection mechanism 4 includes copper strip winding wheels 41 that are symmetrically arranged on both sides of the welding device 2, and a roller support plate 47 is arranged on the side of the copper strip winding wheel 41 close to the welding device 2, and a process protection belt 8 is wound on the copper strip winding wheel 41, and the process protection belt 8 is installed The positioning roller 49 mounted on the roller support plate 47 is arranged between the upper welding electrode 6 and the lower welding electrode 7. Since there is a risk of sticking to the welding head when resistance welding is used to weld the aluminum pole ears and poles, which affects the life of the electrode. Therefore, the electrode belt is used as a protective belt. Specifically, the material of the process protection belt 8 can be copper, nickel or other metals. The metal belt is used as a protective belt for the welding electrode. During the welding process, the dirty process welding belt is moved and the new contact surface is put in place for welding, thereby avoiding contamination of the welding electrode and preventing the electrode from being adhered to the pole ears and poles to be welded. There is no need to clean the welding electrode, thereby reducing the energy consumption of the entire welding process and improving production efficiency.

[0021] The two sides of the copper strip winding wheel 41 are installed on a winding wheel mounting plate 42 connected to the welding device 2 through bearing seats and positioning blocks. The winding wheel mounting plate 42 is L-shaped. The copper strip winding wheel 41 on the right is the driving wheel, and the one on the left is the driven wheel, which is used to drive the operation of the process protection belt 8 to realize automated production and avoid safety hazards caused by manual placement of protection sheets.

[0022] A winding motor 43 is provided at the end of the winding wheel mounting plate 42 away from the driving wheel. The winding motor 43 is fixed on a motor mounting plate 44 connected to the welding device 2. The output end of the winding motor 43 is connected to the connecting rod of the driving wheel through a coupling 45. A magnetic powder brake 46 is provided at the end of the winding wheel mounting plate 42 away from the driven wheel. The magnetic powder brake 46 is fixed on a brake mounting plate 461 connected to the welding device 2. The output end of the magnetic powder brake 46 is connected to the connecting rod of the driven wheel through the coupling 45. The winding motor 43 and the magnetic powder brake 46 cooperate with each other to realize the equidistant movement of the process protection belt 8. The dirty process welding belt moves a certain distance to ensure that the new contact surface at the rear can complete the welding, so as to reasonably utilize the area of ​​the process protection belt 8 and save materials.

[0023] like Figure 3 As shown, the inner side of the roller support plate 47 is connected to the welding device 2 through a welding machine pad 48, and at least two bending sections are arranged on the roller support plate 47. Positioning rollers 49 are movably mounted on the bottom of the roller support plate 47 and on the bending position of the roller support plate 47 close to the copper strip winding wheel 41. The positioning rollers 49 at the bending position of the roller support plate 47 close to the copper strip winding wheel 41 provide auxiliary support for the process protection belt 8 when the winding radius of the copper strip winding wheel 41 increases, so as to avoid the breakage of the protection belt during the winding process.

[0024] like Figure 4 As shown, the positioning roller 49 has an I-shaped structure, which is convenient for positioning the process protection belt 8 and avoiding offset during welding that affects the welding quality. The end face of the positioning roller 49 is movably provided with a connecting shaft 491 that is clamped in the roller support plate 47. The bottom of the connecting shaft 491 is provided with a top cover 471 connected to the roller support plate 47. The friction force generated by the process protection belt 8 and the positioning roller 49 is driven by the copper belt winding wheel 41 to drive the positioning roller to rotate, thereby reducing the wear of the process protection belt 8 and avoiding breakage.

[0025] The upper welding electrode 6 is installed at the bottom of the welding device 2, and the lower welding electrode 7 is installed on the base 1. The feeding mechanism places the pole ear and pole column, and then the pressure device 5 controls the upper welding electrode 6 and the process protection belt 8 to press down to the surface of the welding part, apply welding pressure, and energize welding to achieve single-point pole ear and pole welding.

[0026] The working principle of this embodiment is: the feeding mechanism places the pole ear and pole column, and then the pressure device controls the upper welding electrode and the process protection belt to press down to the surface of the welding part, applies welding pressure, and turns on the power to weld to achieve single-point pole ear and pole welding. After welding, the pole ear and the protective belt will have a certain adhesion, and the aluminum will stick to the surface of the protective belt. However, in the process of lifting the upper welding electrode, the workpiece and the protective belt will be separated. After welding one point, the winding motor controls the process protection belt to rotate and move to the next position for welding at a new point. The process protection belt is recycled, thereby increasing the life of the electrode.

[0027] Several points that need to be explained are: First, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two elements, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change; secondly, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities.

[0028] The above examples are merely illustrative of the present utility model and do not constitute a limitation on the protection scope of the present utility model. All designs that are identical or similar to the present utility model fall within the protection scope of the present utility model.

Claims

1. A resistance welding electrode life protection mechanism, comprising a welding device (2) and an electrode protection mechanism (4) arranged on both sides of the welding device (2), characterized in that: The welding device (2) comprises a base (1) which is arranged horizontally and connected to a frame, the welding device (2) is connected to the base (1) via a vertically arranged connecting plate, an upper welding electrode (6) and a lower welding electrode (7) which are arranged opposite to each other in a height direction are arranged below the welding device (2), a control system (3) is arranged on the base (1) behind the welding device (2), a pressure device (5) is connected to the top of the welding device (2), and the electrode protection mechanism (4) comprises copper strip winding wheels (41) which are symmetrically arranged on both sides of the welding device (2), a roller support plate (47) is arranged on one side of the copper strip winding wheel (41) close to the welding device (2), a process protection belt (8) is wound on the copper strip winding wheel (41), and the process protection belt (8) is arranged between the upper welding electrode (6) and the lower welding electrode (7) via a positioning roller (49) installed on the roller support plate (47).

2. A resistance welding electrode life protection mechanism according to claim 1, characterized in that: The two sides of the copper strip reel (41) are mounted on a reel mounting plate (42) connected to the welding device (2) via bearing seats and positioning blocks; the reel mounting plate (42) is L-shaped; the copper strip reel (41) on the right side is a driving wheel, and the one on the left side is a driven wheel.

3. A resistance welding electrode life protection mechanism according to claim 2, characterized in that: A winding motor (43) is provided at one end of the winding wheel mounting plate (42) away from the driving wheel. The winding motor (43) is fixed on a motor mounting plate (44) connected to the welding device (2). The output end of the winding motor (43) is connected to the connecting rod of the driving wheel via a coupling (45).

4. A resistance welding electrode life protection mechanism according to claim 2, characterized in that: A magnetic powder brake (46) is provided at one end of the winding wheel mounting plate (42) away from the driven wheel. The magnetic powder brake (46) is fixed on a brake mounting plate (461) connected to the welding device (2). The output end of the magnetic powder brake (46) is connected to the connecting rod of the driven wheel via a coupling (45).

5. A resistance welding electrode life protection mechanism according to claim 1, characterized in that: The inner side of the roller support plate (47) is connected to the welding device (2) via a welding machine pad (48); at least two bending sections are provided on the roller support plate (47); and positioning rollers (49) are movably mounted at the bottom of the roller support plate (47) and at a bending position of the roller support plate (47) close to the copper strip winding wheel (41).

6. A resistance welding electrode life protection mechanism according to claim 5, characterized in that: The positioning roller (49) is in an I-shaped structure, and a connecting shaft (491) that is movably mounted on the end surface of the positioning roller (49) and is clamped in the roller support plate (47) is movably disposed, and a top cover (471) that is connected to the roller support plate (47) is disposed at the bottom of the connecting shaft (491).

7. A resistance welding electrode life protection mechanism according to claim 1, characterized in that: The upper welding electrode (6) is mounted on the bottom of the welding device (2), and the lower welding electrode (7) is mounted on the base (1).

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