Projection welding machine for projection welding of screws

Abstract

The utility model relates to the technical field of welding equipment, in particular to a projection welding machine for projection welding of screws, which comprises a main machine and a control panel, one side of the main machine is provided with an upper electrode and a lower electrode, the lower electrode is fixed, the upper electrode moves close to or away from the lower electrode, and the end face of the upper electrode facing the lower electrode is provided with a containing groove for containing and adsorbing the screws. The screw is attracted in the containing groove of the upper electrode under the action of the magnet, the upper electrode is pushed by the air cylinder to linearly move towards the lower electrode, and stable screw welding is achieved. And instability of welding performance caused by factors such as angle and force during manual operation in the welding process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a projection welding machine used for projection welding screws. Background Art

[0002] In the process of automobile parts processing and production, many workpieces need to be connected by studs, so stud welding is an indispensable process in the automobile production process. Existing stud welding is all done manually with a stud welding machine. During the welding process, the welding performance may be unstable due to the influence of factors such as angle and force during manual operation. Utility Model Content

[0003] In view of the above technical problems, an embodiment of the utility model provides a projection welding machine for projection welding screws to solve the problems raised in the above background technology.

[0004] The utility model provides the following technical solutions:

[0005] A projection welding machine for projection welding screws comprises a main machine and a control panel. An upper electrode and a lower electrode are arranged on one side of the main machine. The lower electrode is fixed, and the upper electrode moves close to or away from the lower electrode. An accommodating groove for accommodating and adsorbing the screw is arranged on the end surface of the upper electrode facing the lower electrode.

[0006] Preferably, a magnet bracket and an insulating sleeve are sequentially arranged in the accommodating groove from the inner bottom surface toward the opening direction, the magnet bracket reciprocates between the bottom surface of the accommodating groove and the insulating sleeve, and a magnet is arranged in the magnet bracket.

[0007] Preferably, the magnet bracket is connected to the bottom surface of the accommodating groove through a spring.

[0008] Preferably, a threaded hole connected to the accommodating groove is formed on the outer side surface of the upper electrode, and a top screw for supporting the insulating sleeve is provided in the threaded hole.

[0009] Preferably, a cylinder is fixedly connected to an upper portion of one side of the main machine, and a connecting portion is provided at one end of the upper electrode away from the opening of the accommodating groove, and the upper electrode is fixedly connected to the free end surface of the cylinder through the connecting portion.

[0010] Preferably, an electric wire is provided in the cylinder, and a power-conducting groove is provided on the end surface of the connecting portion facing the connecting groove. After the upper electrode is connected to the cylinder, the electric wire extends from the cylinder to the power-conducting groove to be electrically connected to the upper electrode.

[0011] Preferably, the outer circumferential surface of the upper electrode is provided with two symmetrical cut surfaces.

[0012] The utility model provides a projection welding machine for projection welding screws, which has the following beneficial effects: the screws are adsorbed in the receiving groove of the upper electrode under the action of the magnet, and the upper electrode moves linearly toward the lower electrode under the push of the cylinder, thereby realizing stable welding of the screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the upper electrode of the utility model.

[0015] Figure numerals: 1. main machine; 101. cylinder; 2. upper electrode; 201. magnet bracket; 202. insulating sleeve; 203. magnet; 204. top screw; 205. connecting part; 206. power-on slot; 3. lower electrode. DETAILED DESCRIPTION

[0016] 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 of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-2 A projection welding machine for projection welding screws includes a main unit 1 and a control panel. An upper electrode 2 and a lower electrode 3 are provided on one side of the main unit 1. The lower electrode 3 is fixed, and the upper electrode 2 moves in a manner of approaching or leaving the lower electrode 3. An accommodating groove for accommodating and adsorbing a screw is provided on the end surface of the upper electrode 2 facing the lower electrode 3. The upper electrode 2 drives the screw to move toward the lower electrode 3, so that the outer side of the head of the screw (i.e., the side of the screw facing away from the screw rod) contacts the workpiece to be processed on the lower electrode 3 and is energized, thereby realizing projection welding of the screw.

[0018] A magnet support 201 and an insulating sleeve 202 are sequentially arranged in the receiving groove from the inner bottom surface to the opening direction. The magnet support 201 reciprocates between the bottom surface of the receiving groove and the insulating sleeve 202. A magnet 203 is arranged in the magnet support 201. The magnet 203 adsorbs the screw rod of the screw in the insulating sleeve in the receiving groove so that the screw rod is not electrified. The inner side bearing surface of the screw head contacts the end surface of the upper electrode 2 facing the lower electrode 3 to realize electrification.

[0019] The magnet bracket 201 is connected to the bottom surface of the receiving groove through a spring, and the magnet bracket 201 is closely attached to the insulating sleeve 202 under the action of the spring, and the magnet 203 in the magnet bracket 201 is close to the screw of the screw inserted into the insulating sleeve 202 to magnetically attract the screw, and at the same time, a buffering effect is provided for the screw inserted into the insulating sleeve 202.

[0020] A threaded hole connected to the receiving groove is formed on the outer side of the upper electrode 2 , and a top screw 204 for supporting the insulating sleeve 202 is provided in the threaded hole, so that the insulating sleeve 202 is fixed in the receiving groove.

[0021] The cylinder 101 is fixedly connected to the upper part of one side of the main machine 1, and a connecting portion 205 is provided at one end of the upper electrode 2 away from the opening of the accommodating groove, and the upper electrode 2 is fixedly connected to the free end face of the cylinder 101 through the connecting portion 205. In the present application, a groove is provided on the free end face of the cylinder 101, and the connecting portion 205 is inserted into the groove of the cylinder 101 to be connected in an interference fit manner.

[0022] An electric wire is provided in the cylinder 101, and a power-conducting groove 206 is provided on the end face of the connecting portion 205 facing the connecting groove. After the upper electrode 2 is connected to the cylinder 101, the electric wire extends from the cylinder 101 to the power-conducting groove 206 and is electrically connected to the upper electrode 2, so that the upper electrode 2 is energized.

[0023] The outer circumferential surface of the upper electrode 2 is provided with two symmetrical cut surfaces, so as to facilitate the removal of the upper electrode 2 using corresponding tools.

[0024] Working principle: insert the upper electrode 2 into the groove opened on the end face of the free end of the cylinder 101 and fix it, and place the part to be welded on the lower electrode 3. Insert the screw into the receiving groove opened in the upper electrode 2, and the magnet 203 in the receiving groove will attract the screw rod and then release it. At this time, the screw rod is adsorbed in the receiving groove, and the inner side bearing surface of the screw head does not contact the end face of the upper electrode 2, that is, the screw is not energized at this time.

[0025] The control device controls the free end of the cylinder 101 to telescope in the direction of the lower electrode 3, so that the upper electrode 2 moves in the direction close to the lower electrode 3. When the outer side of the screw head inserted in the upper electrode 2 contacts the workpiece to be welded on the lower electrode 3, the upper electrode 2 continues to press down so that the end face of the upper electrode 2 contacts the inner bearing surface of the bolt head, and power is turned on and pressure is applied. After power is turned on, the preset protrusions on the outer side of the screw head contact the workpiece to be welded and are heated by power. The heated protrusions are collapsed under the push of the cylinder, so that these contact points form welding points to complete the projection welding. After the projection welding is completed, the cylinder 101 contracts to lift the upper electrode 2. After the welding is completed, the screw is fixed on the welded workpiece and separated from the receiving groove of the upper electrode 2. The lifted upper electrode 2 waits for the next projection welding operation.

[0026] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0027] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0028] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and concept of the utility model, and all these changes or substitutions should fall within the protection scope of the claims attached to the utility model.

Claims

1. A projection welding machine for projection welding screws, comprising a main machine (1) and a control panel, wherein an upper electrode (2) and a lower electrode (3) are provided on one side of the main machine (1), the lower electrode (3) is fixed, and the upper electrode (2) moves toward or away from the lower electrode (3), characterized in that: The end surface of the upper electrode (2) facing the lower electrode (3) is provided with a receiving groove for receiving and adsorbing the screw; A magnet support (201) and an insulating sleeve (202) are arranged in sequence in the receiving groove from the inner bottom surface to the opening direction. The magnet support (201) reciprocates between the bottom surface of the receiving groove and the insulating sleeve (2), and a magnet (203) is arranged in the magnet support (201).

2. The projection welding machine for projection welding screws according to claim 1, characterized in that: The magnet support (201) is connected to the bottom surface of the accommodating groove via a spring.

3. The projection welding machine for projection welding screws according to claim 1, characterized in that: The outer side surface of the upper electrode (2) is provided with a threaded hole connected to the accommodating groove, and a top screw (204) for supporting the insulating sleeve (202) is provided in the threaded hole.

4. The projection welding machine for projection welding screws according to claim 1, characterized in that: A cylinder (101) is fixedly connected to an upper portion of one side of the main machine (1); a connecting portion (205) is provided at an end of the upper electrode (2) away from the opening of the accommodating groove; and the upper electrode (2) is fixedly connected to a free end surface of the cylinder (101) via the connecting portion (205).

5. The projection welding machine for projection welding screws according to claim 4, characterized in that: An electric wire is arranged in the cylinder (101), and an electric conduction groove (206) is provided on the end surface of the connecting portion (205) facing the connecting groove. After the upper electrode (2) is connected to the cylinder (101), the electric wire extends from the cylinder (101) to the electric conduction groove (206) and is electrically connected to the upper electrode (2).

6. The projection welding machine for projection welding screws according to claim 5, characterized in that: The outer circumferential surface of the upper electrode (2) is provided with two symmetrical cut surfaces.

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