Electric resistance welding clamp mechanism

Abstract

The utility model provides a resistance welding clamp mechanism which comprises a base and a welding clamping air cylinder connected to the lower portion of the base through a sliding rail, a first electrode assembly is arranged on the opposite side of the welding clamping air cylinder, and the first electrode assembly comprises a first electrode and a conductive copper bar connected with the first electrode; an air cylinder shaft of the welding clamping air cylinder is connected with a second electrode assembly, the second electrode assembly comprises a second electrode opposite to the first electrode and a conductive copper bar connected with the second electrode, and the welding clamping air cylinder drives the second electrode assembly to do reciprocating motion in the direction of the first electrode assembly to achieve opening and closing of the two electrodes. The mechanism is compact in structure and high in space utilization rate. Meanwhile, the whole mechanism is in a floating state in the form of being installed on the linear guide rail, no force except for clamping is generated on the product during welding, the purity of the welding process is guaranteed, no extra stress is generated after welding is completed, and the welding effect is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of automated welding, and in particular relates to a resistance welding clamp mechanism. Background Art

[0002] With the continuous development of industrialized production, the requirements for automation are getting higher and higher. In daily factory production, various components often need to be welded automatically. In automated welding, resistance welding has become the most widely used welding method. However, due to structural limitations, the existing resistance welding clamp mechanism occupies a large space in the entire production line, resulting in low space utilization. At the same time, the existing resistance welding clamp mechanism has weak compatibility, and additional stress will inevitably be generated during the welding process, which is not conducive to the welding of high-precision products. Utility Model Content

[0003] In order to solve the deficiencies of the prior art, the utility model provides a resistance welding clamp mechanism, which has a compact structure and effectively improves space utilization.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A resistance welding clamp mechanism includes a base and a welding clamping cylinder connected to the base through a slide rail, a first electrode assembly is arranged on the opposite side of the welding clamping cylinder, the first electrode assembly includes a first electrode and a conductive copper bar connected to the first electrode; the cylinder shaft of the welding clamping cylinder is connected to the second electrode assembly, the second electrode assembly includes a second electrode arranged opposite to the first electrode and a conductive copper bar connected to the second electrode, and the welding clamping cylinder drives the second electrode assembly to reciprocate in the direction of the first electrode assembly to realize the opening and closing of the two electrodes.

[0006] Preferably, the first electrode assembly and the second electrode assembly are both provided with a water cooling interface for welding cooling.

[0007] Preferably, the second electrode assembly further comprises a welding force adjustment assembly arranged at one side of the second electrode, and a displacement sensor is arranged above the welding force adjustment assembly.

[0008] Preferably, the welding force adjustment assembly includes a welding force adjustment rotating rod, on which a force sensor is arranged; a connecting block is arranged above the second electrode, the connecting block is placed on a guide rail through a slider, and a force-bearing spring is arranged between the connecting block and the welding force adjustment rotating rod.

[0009] Preferably, an induction auxiliary strip is provided on the connection block, and the displacement sensing end of the displacement sensor is provided on one side of the induction auxiliary strip.

[0010] Preferably, a limit block is connected to the cylinder shaft of the welding clamping cylinder, and the limit block is arranged opposite to the clamping limit block arranged on the second electrode assembly side.

[0011] Preferably, an origin cylinder is provided at the upper end of the welding clamping cylinder.

[0012] The beneficial effects of the utility model are as follows: the structure of the mechanism is compact and the space utilization rate is high. At the same time, the entire mechanism is in a floating state by being installed on a linear guide rail, and no force other than clamping is generated on the product during welding, which ensures the purity of the welding process, and there is no additional stress after welding, and the welding effect is good. At the same time, the entire mechanism can be installed on different equipment, which improves the compatibility of the clamp mechanism, and the welding force adjustment component can effectively adjust the welding force and conduct timely detection of the welding force, and the welding accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 : The structural schematic diagram of the utility model.

[0015] Figure 2 : Another perspective structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0016] The utility model discloses a resistance welding clamp mechanism, combined with Figure 1-Figure 2 As shown, it includes a base 9 and a welding clamping cylinder 1 connected to the base 9 through a slide rail 93. The base 9 can be connected with other equipment, that is, the resistance welding clamp mechanism of the utility model is installed as a whole at the scene position required for use.

[0017] The upper end of the welding clamping cylinder 1 is connected to the origin cylinder 8. A position retainer 92 is provided on one side of the base 9, through which the final position of the mechanism can be locked.

[0018] A first electrode assembly is disposed on the opposite side of the welding clamping cylinder 1, and the first electrode assembly includes a first electrode 32 and a conductive copper bar 31 connected to the first electrode 32. The cylinder shaft of the welding clamping cylinder 1 is connected to a second electrode assembly, and the second electrode assembly includes a second electrode 33 disposed opposite to the first electrode 32 and a conductive copper bar 31 connected to the second electrode 33. When the welding clamping cylinder 1 is in operation, the second electrode assembly is driven to reciprocate toward the first electrode assembly to realize the opening and closing of the two electrodes.

[0019] During welding, the product is placed between the two electrodes, and the welding clamping cylinder 1 works to drive the second electrode 33 to move toward the first electrode 32 to clamp the product. The welding power supply will supply power to the electrodes through the conductive copper bus 31 to enter the welding process. The welding principle is the same as the existing resistance welding principle, which will not be repeated here.

[0020] In order to improve welding quality and efficiency, the first electrode assembly and the second electrode assembly are both provided with a water cooling interface 34 for welding cooling so as to cool the electrodes in time.

[0021] In order to control the clamping force between the two electrodes, a welding force adjustment component is also provided on one side of the second electrode 33. The welding force adjustment component includes a welding force adjustment rotating rod 6. A force sensor 61 is provided on the welding force adjustment rotating rod 6. The clamping force is adjusted by rotating the welding force adjustment rotating rod 6. At the same time, the force data of the force sensor 61 is obtained for easy monitoring.

[0022] A connecting block is disposed above the second electrode 33, and the connecting block is placed on the guide rail 64 via a slider 63. A bearing spring 62 is disposed between the connecting block and the welding force adjustment rotating rod 6. The welding force adjustment rotating rod 6 is rotated to adjust the clamping force, and the clamping force is transmitted to the slider 63 via the bearing spring 62 and then to the second electrode 33.

[0023] A displacement sensor 7 is arranged above the welding force adjustment assembly, an induction auxiliary strip 71 is arranged on the connection block, and a displacement sensing end of the displacement sensor 7 is arranged on one side of the induction auxiliary strip 71. The displacement sensor 7 further determines whether the welding process is within the normal variation range by detecting the change value of the displacement before and after welding.

[0024] The cylinder shaft of the welding clamping cylinder 1 is connected to a limit block 11, which is arranged opposite to the clamping limit block 4 arranged on the second electrode assembly side. Through the cooperation between the limit block 11 and the clamping limit block 4, the limit position during welding can be controlled and adjusted.

[0025] In order to ensure the stability of the movement of the auxiliary electrode during advancement, a set of movable guide rails 52 are connected under the cylinder seat of the welding clamping cylinder 1, and the second electrode 33 is placed on the movable guide rails through the movable slider 51 on the second connecting block 2, and the second connecting block 2 is connected to the cylinder shaft of the welding clamping cylinder 1. Furthermore, a guide rail 64 is provided under the second connecting block 2, and the second electrode 33 is connected to the guide rail 64 through the slider 63 on the connecting block.

[0026] Before welding, the clamping force is adjusted by adjusting the welding force adjusting rotating rod 6. Then, the product to be welded is placed between the two electrodes, and the welding clamping cylinder 1 is operated to drive the components on the second connecting block 2 to move toward the first electrode 32 through the cylinder shaft to clamp the product. After welding is completed, the welding clamping cylinder 1 is reset, and the components on the second connecting block 2 are reset at the same time.

[0027] Specifically, during operation, the retainer 92 is released and the origin cylinder 8 is extended. When the origin cylinder 8 is de-energized, the slider of the slide rail 93 is in a state of no force in the horizontal direction. At this time, the welding clamping cylinder 1 is extended to perform the clamping action. During the clamping process, the second electrode 33 first contacts the pin to be welded (in this embodiment, the pin to be welded is located between the first electrode 32 and the second electrode 33). The clamping force drives the first electrode 32 to move along the slide rail 93 toward the workpiece to be welded, thereby completing the clamping action.

[0028] Then, the welding is powered on, the welding clamping cylinder 1 drives the clamp (i.e., the two electrodes) to loosen, and the origin cylinder 8 extends to center the workpiece to be welded. During this process, the workpiece to be welded is separated from the two electrodes, and the retainer 92 maintains the current position, waiting for the welded workpiece to be completely separated, that is, the welding is completed.

[0029] Finally, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Resistance welding clamp mechanism, characterized in that: It includes a base and a welding clamping cylinder connected to the base through a slide rail, a first electrode assembly is arranged on the opposite side of the welding clamping cylinder, the first electrode assembly includes a first electrode and a conductive copper bar connected to the first electrode; the cylinder shaft of the welding clamping cylinder is connected to the second electrode assembly, the second electrode assembly includes a second electrode arranged opposite to the first electrode and a conductive copper bar connected to the second electrode, and the welding clamping cylinder drives the second electrode assembly to reciprocate in the direction of the first electrode assembly to realize the opening and closing of the two electrodes.

2. The resistance welding clamp mechanism according to claim 1, characterized in that: The first electrode assembly and the second electrode assembly are both provided with a water cooling interface for welding cooling.

3. The resistance welding clamp mechanism according to claim 2, characterized in that: The second electrode assembly further includes a welding force adjustment assembly disposed on one side of the second electrode, and a displacement sensor is disposed above the welding force adjustment assembly.

4. The resistance welding clamp mechanism according to claim 3, characterized in that: The welding force adjustment component includes a welding force adjustment rotating rod, on which a force sensor is arranged; a connecting block is arranged above the second electrode, the connecting block is placed on a guide rail through a slider, and a load-bearing spring is arranged between the connecting block and the welding force adjustment rotating rod.

5. The resistance welding clamp mechanism according to claim 4, characterized in that: An induction auxiliary strip is arranged on the connection block, and the displacement sensing end of the displacement sensor is arranged on one side of the induction auxiliary strip.

6. The resistance welding clamp mechanism according to claim 1, characterized in that: A limit block is connected to the cylinder shaft of the welding clamping cylinder, and the limit block is arranged opposite to the clamping limit block arranged on the second electrode assembly side.

7. The resistance welding clamp mechanism according to claim 1, characterized in that: An origin cylinder is arranged at the upper end of the welding clamping cylinder.

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