A medium frequency inverter circular seam welding equipment

Abstract

The utility model discloses a medium frequency inverter annular seam welding equipment, including a frame-type fuselage composed of an upper bracket and a lower bracket, an electrode holder system and a servo mobile platform are installed on the top of the upper bracket, a welding pressure system is arranged on the top of the electrode holder system, the welding pressure system is connected to a foot switch arranged at the bottom of the lower bracket through a proportional valve installed on the side of the upper bracket, a control box is installed between the lower bracket and the upper bracket, and a cooling system is arranged on the fuselage on the side of the control box. The fuselage of the utility model has high overall strength, small deformation, good rigidity against vibration and impact, can prevent the welding wheel from being misaligned during pressurization to achieve stable welding, the material of the welding wheel can be copper alloy, tungsten alloy, molybdenum electrode, etc., can be used for welding metal materials such as copper, aluminum, steel, nickel, etc., the operation of the welding machine is controlled by a foot switch, has high productivity and low labor intensity, and the cooling system can realize water temperature control and flow regulation to avoid the generation of condensed water affecting the normal operation of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a medium frequency inverter annular seam welding equipment. Background Art

[0002] Resistance spot welding is a metal connection method that forms a permanent bond. During welding, the weldment undergoes plastic deformation due to local heating at the welding current, and pressure is applied to the heated contact of the weldment to form a molten core. Seam welding is an evolution of spot welding. The spot welding electrode is replaced by a circular welding wheel. When the welding wheel rolls continuously or intermittently and is energized with continuous or intermittent current pulses, a seam weld consisting of a series of welds is formed. When the spot pitch is large, the discontinuous weld formed is similar to spot welding and is called rolling spot welding. At present, resistance spot welding and seam welding are widely used in various industrial sectors such as aviation, aerospace, automobiles, electronics, and instrumentation. The medium frequency inverter controller adopts internationally advanced inverter medium frequency technology and pulse width modulation. The input voltage is three-phase 380V / 50Hz, and the output voltage after inversion is 500V / 1000Hz. The control frequency is increased by 20 times, which can control the welding current more effectively. The controller can flexibly program the welding program. Welding modes such as constant current and constant voltage can be applied in the same welding specification. The compensation accuracy is high, and a group control interface is reserved. Industrial computer programming is flexible and convenient; fault self-detection and code display, and the input and output interfaces are flexibly defined.

[0003] At present, welding equipment is usually equipped with a cooling structure. When using a chiller, the outlet temperature of the chiller cannot differ too much from the ambient temperature, otherwise condensation water will be generated, causing a short circuit in the transformer or inverter. Utility Model Content

[0004] In order to solve the above technical problems, a medium frequency inverter annular seam welding device is provided.

[0005] To achieve the above-mentioned purpose, the utility model discloses a medium frequency inverter annular seam welding equipment, including a frame-type fuselage composed of an upper bracket and a lower bracket, an electrode holder system and a servo movable platform are installed on the top of the upper bracket, a welding pressure system is arranged on the top of the electrode holder system, the welding pressure system is connected to a foot switch arranged at the bottom of the lower bracket through a proportional valve installed on the side of the upper bracket, a control box is installed between the lower bracket and the upper bracket, and a cooling system is arranged on the fuselage on the side of the control box.

[0006] Furthermore, the electrode holder system includes a lower welding wheel mechanism installed on the top of the upper bracket and an upper welding wheel mechanism arranged above the lower welding wheel mechanism. The lower welding wheel mechanism is connected to the servo motor through a reducer, and a transformer is connected to the rear of the electrode holder system.

[0007] Furthermore, the upper welding wheel mechanism includes a conductive box connected to the welding pressure system, a gear box is provided on the side of the conductive box close to the transformer, a welding wheel is provided on the side of the conductive box away from the gear box, and a sealing ring is installed between the welding wheel and the rotating shaft inside the conductive box.

[0008] Furthermore, the positive pole of the transformer is connected to the upper welding wheel mechanism through a secondary loop, and the negative pole of the transformer is connected to the lower welding wheel mechanism through a secondary loop.

[0009] Furthermore, the cooling system is a closed-type circulating water cooling system, comprising an inlet water splitting pipe and an outlet water splitting pipe installed on the side of the fuselage, the inlet water splitting pipe and the outlet water splitting pipe are arranged in parallel and the inlet water splitting pipe is installed above the outlet water splitting pipe, the inlet water splitting pipe inlet is connected to the water inlet ball valve through a filter, at least ten water inlet hoses are connected above the inlet water splitting pipe through the inlet branch ball valve, the outlet of the water splitting pipe is connected to the water outlet ball valve through a flow switch, and a corresponding number of water outlet hoses are connected to the top of the water splitting pipe.

[0010] Furthermore, a pressure switch is installed on the machine body above the water inlet and outlet pipe, and the pressure switch is connected to the welding pressure system and the cooling system respectively through an air path system arranged in the control box.

[0011] Furthermore, the cooling system is connected to the upper welding wheel mechanism, the lower welding wheel mechanism, the transformer and the controller respectively.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the utility model discloses a medium frequency inverter annular seam welding equipment, which has a high overall strength of the body, small deformation, good rigidity against vibration and impact, can prevent the welding wheel from being dislocated during pressurization to achieve stable welding, and the upper and lower welding wheels can be made of copper alloys, tungsten alloys, molybdenum electrodes, etc., which can be used for welding parts of metal materials such as copper, aluminum, steel, and nickel. The operation of the welding machine is controlled by a foot switch, which has high productivity and low labor intensity, and the closed circulating water cooling system can realize water temperature control and flow regulation to avoid the generation of condensed water affecting the normal operation of the equipment. 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 a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the electrode holder system and welding pressure system of the utility model.

[0016] Figure 3 For this utility model Figure 2 Enlarged schematic diagram at point A in the middle.

[0017] Figure 4 It is a schematic diagram of the cooling system of the present utility model.

[0018] Figure 5 The utility model is a schematic diagram of the water circuit of the cooling system.

[0019] In the figure: 1 is the upper bracket; 2 is the lower bracket; 3 is the electrode holder system; 31 is the lower welding wheel mechanism; 32 is the servo motor; 33 is the upper welding wheel mechanism; 331 is the conductive box; 332 is the gear box; 333 is the welding wheel; 34 is the transformer; 4 is the welding pressure system; 5 is the control box; 6 is the cooling system; 61 is the water inlet water pipe; 611 is the filter; 612 is the water inlet ball valve; 613 is the water inlet branch ball valve; 614 is the water inlet hose; 62 is the water outlet water pipe; 621 is the flow switch; 622 is the water outlet ball valve; 623 is the water outlet hose; 7 is the pressure switch. DETAILED DESCRIPTION

[0020] 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.

[0021] An embodiment of the utility model, as Figure 1 As shown, a medium frequency inverter annular seam welding equipment includes a frame body composed of an upper bracket 1 and a lower bracket 2. An electrode holder system 3 and a servo movable platform are installed on the top of the upper bracket 1. The servo movable platform is located between an upper welding wheel mechanism 33 and a lower welding wheel mechanism 31. The structure is not shown in the figure. The servo movable platform carries the welding workpiece and moves according to the shape of the workpiece required for welding. A welding pressure system 4 is arranged on the top of the electrode holder system 3. The welding pressure system 4 is connected to a foot switch 8 arranged at the bottom of the lower bracket 2 through a proportional valve 41 installed on the side of the upper bracket 1. When the foot switch is stepped on, the lower air chamber of the welding cylinder at the welding pressure system 4 is inhaled, and the upper air chamber is deflated. Press down; otherwise, the cylinder rises to pressurize the workpiece during welding. A control box 5 is installed between the lower bracket 2 and the upper bracket 1. A cooling system 6 is arranged on the fuselage on the side of the control box 5. The overall strength of the fuselage is high, deformation is small, and it has good rigidity against vibration and impact. It can prevent the welding wheel from being misplaced during pressurization to achieve stable welding. The upper and lower welding wheels can be made of copper alloys, tungsten alloys, molybdenum electrodes, etc., which can be used for welding parts of metal materials such as copper, aluminum, steel, and nickel. The operation of the welding machine is controlled by a foot switch, which has high productivity and low labor intensity. The closed circulating water cooling system can realize water temperature control and flow regulation to avoid the generation of condensed water affecting the normal operation of the equipment.

[0022] like Figure 2 As shown, the electrode holder system 3 includes a lower welding wheel mechanism 31 installed on the top of the upper bracket 1 and an upper welding wheel mechanism 33 arranged above the lower welding wheel mechanism 31. The lower welding wheel mechanism 31 is connected to the servo motor 32 through a reducer, and a transformer 34 is connected to the rear of the electrode holder system.

[0023] like Figure 3 As shown, the upper welding wheel mechanism 33 includes a conductive box 331 connected to the welding pressure system 4, a gear box 332 is provided on the side of the conductive box 331 close to the transformer 34, a welding wheel 333 is provided on the side of the conductive box 331 away from the gear box 332, and a sealing ring is installed between the welding wheel 333 and the rotating shaft inside the conductive box 331. The upper welding wheel mechanism 33 has the same structure as the lower welding wheel mechanism 31, and is mainly composed of an electrode seat, a welding wheel, a conductive shaft, a conductive silver sheet, a cooling and gear box, a secondary guide plate, a bearing, a gear, an insulating sleeve, etc. The upper welding wheel is driven by the lower welding wheel as a passive wheel to rotate and transport. Its function is to make it conductive and then weld the workpiece. The lower welding wheel mechanism 31 is connected to the servo motor 32 through a transmission mechanism, and the transmission mechanism is composed of a servo motor, a reducer, a shaft, a spline, a connecting rod, a universal joint, and a conductive box gear.

[0024] The positive pole of the transformer 34 is connected to the upper welding wheel mechanism 33 through a secondary loop, and the negative pole of the transformer 34 is connected to the lower welding wheel mechanism 31 through a secondary loop, thereby forming a welding loop.

[0025] like Figure 4 As shown, the cooling system 6 is a closed circulating water cooling system, including an inlet water splitting pipe 61 and an outlet water splitting pipe 62 installed on the side of the fuselage, the inlet water splitting pipe 61 and the outlet water splitting pipe 62 are arranged in parallel and the inlet water splitting pipe 61 is installed above the outlet water splitting pipe 62, the inlet of the inlet water splitting pipe 61 is connected to the water inlet ball valve 612 through a filter 611, at least ten water inlet hoses 614 are connected to the top of the inlet water splitting pipe 61 through an inlet branch ball valve 613, the outlet of the outlet water splitting pipe 62 is connected to the water outlet ball valve 622 through a flow switch 621, and a corresponding number of water outlet hoses 623 are connected to the top of the outlet water splitting pipe 62. As a preferred embodiment of the present application, the flow switch 621 adopts an SMC flow switch. Before starting the machine, open the water inlet and outlet ball valves first, check whether the flow switch has reached the set value, and use the flow display to check whether the water in each branch has reached the set value. The set value can be adjusted through the ball valves on each branch to ensure that the temperature difference between the chiller outlet temperature and the ambient temperature is around 5°C. When not in use for a long time, unplug the hose connected to the water outlet, close the water inlet ball valve, open the air outlet ball valve, and blow away the water inside the welding machine to avoid rust and equipment failure.

[0026] A pressure switch 7 is installed on the machine body above the water inlet water diversion pipe 61, and the pressure switch 7 is connected to the welding pressure system 4 and the cooling system 6 respectively through the gas circuit system arranged in the control box 5.

[0027] like Figure 5 As shown, the cooling system 6 is respectively connected to the upper welding wheel mechanism 33, the lower welding wheel mechanism 31, the transformer 34 and the controller.

[0028] The working principle of this embodiment is as follows: the workpiece to be welded is manually placed in the lower electrode special tooling, the welding button is activated, the upper welding wheel mechanism on the upper machine head moves downward under the control of welding pressure to contact the welding workpiece, the servo mobile platform carrying the welding workpiece begins to move, and the welding transformer starts to output welding current. The servo mobile platform moves according to the shape of the workpiece to be welded, and the welding wheel rolls along the edge of the workpiece. All servo movements and servo vertical angle displacements are programmed and controlled by the servo control system, and all actions required for welding are programmed and controlled by the PLC operating desktop control system. After welding is completed, the upper machine head returns to its original position, and the welded workpiece is manually taken out.

[0029] 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.

[0030] 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 medium frequency inverter annular seam welding device, comprising a frame-type body consisting of an upper bracket (1) and a lower bracket (2), characterized in that: An electrode holder system (3) and a servo movable platform are installed on the top of the upper bracket (1); a welding pressure system (4) is arranged on the top of the electrode holder system (3); the welding pressure system (4) is connected to a foot switch (8) arranged at the bottom of the lower bracket (2) via a proportional valve (41) installed on the side of the upper bracket (1); a control box (5) is installed between the lower bracket (2) and the upper bracket (1); and a cooling system (6) is arranged on the body of the side of the control box (5).

2. A medium frequency inverter annular seam welding equipment according to claim 1, characterized in that: The electrode holder system (3) comprises a lower welding wheel mechanism (31) mounted on the top of the upper bracket (1) and an upper welding wheel mechanism (33) arranged above the lower welding wheel mechanism (31); the lower welding wheel mechanism (31) is connected to a servo motor (32) via a reducer; and a transformer (34) is connected to the rear of the electrode holder system.

3. A medium frequency inverter annular seam welding equipment according to claim 2, characterized in that: The upper welding wheel mechanism (33) comprises a conductive box (331) connected to the welding pressure system (4); a gear box (332) is provided on a side of the conductive box (331) close to the transformer (34); a welding wheel (333) is provided on a side of the conductive box (331) away from the gear box (332); and a sealing ring is installed between the welding wheel (333) and a rotating shaft inside the conductive box (331).

4. A medium frequency inverter annular seam welding equipment according to claim 2, characterized in that: The positive electrode of the transformer (34) is connected to the upper welding wheel mechanism (33) through a secondary loop, and the negative electrode of the transformer (34) is connected to the lower welding wheel mechanism (31) through a secondary loop.

5. A medium frequency inverter annular seam welding equipment according to claim 1, characterized in that: The cooling system (6) is a closed-type circulating water cooling system, comprising an inlet water splitting pipe (61) and an outlet water splitting pipe (62) installed on the side of the fuselage, the inlet water splitting pipe (61) and the outlet water splitting pipe (62) being arranged in parallel and the inlet water splitting pipe (61) being installed above the outlet water splitting pipe (62), the inlet of the inlet water splitting pipe (61) being connected to an inlet water ball valve (612) through a filter (611), at least ten inlet water hoses (614) being connected above the inlet water splitting pipe (61) through an inlet water branching ball valve (613), the outlet of the outlet water splitting pipe (62) being connected to an outlet water ball valve (622) through a flow switch (621), and a corresponding number of outlet water hoses (623) being connected to the top of the outlet water splitting pipe (62).

6. A medium frequency inverter annular seam welding equipment according to claim 5, characterized in that: A pressure switch (7) is installed on the machine body above the water inlet water diversion pipe (61), and the pressure switch (7) is connected to the welding pressure system (4) and the cooling system (6) respectively through an air path system arranged in the control box (5).

7. A medium frequency inverter annular seam welding equipment according to claim 5, characterized in that: The cooling system (6) is respectively connected to the upper welding wheel mechanism (33), the lower welding wheel mechanism (31), the transformer (34) and the controller.

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