CN202278296U - Automatic spot welder - Google Patents

Abstract

The utility model relates to a welding device, in particular to an automatic spot welder for welding a plurality of linear welding points on a finished piece. The automatic spot welder comprises a bracket (1) positioned on a baseplate (2), and a welding bracket (3) and a welding induction device arranged above the bracket (1). The welding bracket drives a pair of welding tongs to move linearly on the bracket, and during the movement process, the welding induction device induces the positions of the welding points to be welded by the pair of welding tongs to start the pair of welding tongs to weld the welding points on the finished piece, so that the automation of the welding process of the welding points on the finished piece is achieved, and the welding efficiency is improved while the welding intensity is reduced.

Description

Automatic spot welding machine

technical field

The utility model relates to a welding device, in particular to an automatic spot welding machine for welding a plurality of welding spots arranged in a straight line on a workpiece.

Background technique

Spot welding is the most widely used welding method in automobile manufacturers. Semi-automatic suspension spot welding machines generally rely on manual lifting of the welding tongs to achieve welding of the solder joints on the workpiece. However, when manual welding is performed on multiple welding points arranged in a straight line, not only the welding labor intensity is high, the welding time is long, but also the welding quality is difficult to guarantee, and welding defects are prone to occur during the welding process, such as: horseshoe points, virtual welding, and missing welding etc., the consistency of the solder joints is poor. For example, in the welding of the reinforcement plate assembly of the front door inner panel of the automobile, the solder joints are arranged in a straight line, and each part has two rows of parallel solder joints. There are many solder joints. Need two people to carry out welding, not only labor intensity is big, and work efficiency is low.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides an automatic spot welding machine for automatically welding a plurality of welding spots arranged in a straight line of a workpiece, which can effectively reduce welding labor intensity Improve welding efficiency.

In order to achieve the above object, the automatic spot welding machine of the present utility model welds a plurality of welding spots arranged in a straight line of the workpiece, which includes:

The bracket is positioned on the bottom plate;

The welding bracket is arranged above the bracket, and the welding tongs are fixed on it, and the welding bracket is driven by the first power device fixed on the bracket to drive the welding tongs to move on the bracket along the linear direction of the welding spot of the workpiece ;

The welding induction device senses the welding position of the welding tongs on the welding spot during the moving process of the welding support, so as to start the welding tongs to weld the welding spot of the workpiece at this position.

As a limitation to the above method, the welding induction device includes a contact carrier fixed on the bracket and a contact switch fixed on the welding bracket. The number of points is the same and the contacts are set correspondingly. The contact switch senses the position of each electric contact during the movement of the welding bracket to start the welding tongs to weld the solder joints of the workpiece at this position.

As a further limitation to the above method, the first power device is connected to the welding bracket through a lead screw connected to its rotating power output end.

As a further limitation on the above method, the first power device is a motor.

In addition, the above-mentioned welding tongs are two fixed on the welding bracket.

As an improvement to the present utility model, the bracket is slidably arranged on a slide rail fixed on the bottom plate under the drive of the second power device, and the slide rail is perpendicular to the straight line direction of the welding spot.

As a limitation to the above manner, the second power device is an air cylinder, and an induction switch for sensing the stroke of the cylinder pushing the support is provided on the air cylinder.

In addition, as an improvement to the present utility model, a travel switch for sensing the travel of the welding bracket is provided on the bracket.

Adopt above-mentioned technical scheme, its effect is as follows:

1. The welding tongs are driven by the welding bracket to move linearly on the bracket. During the movement, the welding position of the welding tongs on the welding spot is sensed by the welding induction device, so as to start the welding tongs to weld the welding points of the workpiece at this position Welding realizes the automation of the solder joint welding process on the workpiece, and improves the welding efficiency while reducing the welding labor intensity;

2. The first power unit is connected with the welding bracket through the lead screw, which makes the welding bracket more stable during the movement and makes the welding position easier to control;

3. Two welding tongs are fixed on the welding bracket, which realizes simultaneous welding of two workpieces during one movement of the welding bracket, further improving work efficiency and reducing manpower input;

4. Driven by the second power unit, the bracket is slidably arranged on the slide rail fixed on the bottom plate, which realizes the welding of workpieces with two rows of welding spots arranged in a straight line, and makes the welding automation effect stronger.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Figure 1 is a schematic diagram of the overall structure of the utility model.

In the picture:

1. Bracket; 2. Bottom plate; 3. Welding bracket; 4. Welding tongs; 5. Electric shock bearing frame; 51. Electric shock; 6. Contact switch; 7. First power device; 8. Lead screw; device; 10. slide rail; 11. induction switch; 12. welding element; 13. L-shaped bracket.

Detailed ways

This embodiment illustrates the welding structure of a workpiece with two rows of parallel welding spots, and the automatic spot welding machine of this embodiment can simultaneously complete the simultaneous welding of two workpieces.

As shown in Figure 1, in the structure of the automatic spot welding machine that present embodiment adopts, comprise base plate 2, be provided with two slide rails 10 that are arranged in parallel above base plate 2, be provided with slide rail 10 and slide rail 10 slidingly connected The bracket 1 is driven by the second power device 9 fixedly arranged on the bottom plate, so that the bracket 1 can slide on the guide rail 10 . The second power unit 9 of the present embodiment adopts a cylinder, and an induction switch 11 is arranged on the cylinder. The function of the induction switch 11 is to sense the distance that the support 1 moves on the guide rail 10, so as to generate an induction signal to control the movement of the cylinder to push the support 1 journey.

The top of the support 1 is provided with a welding support 3, the welding support 3 has two connecting arms, each connecting arm is fixedly connected with a welding tongs 4 respectively, as can be seen from the figure, the two welding tongs 4 are symmetrically arranged on the support 1, and welding elements 12 such as welding rods assembled on the welding tongs 4 are arranged vertically downward.

On the opposite side of the welding bracket 3, the top of the bracket 1 is fixedly provided with a first power unit 7. In this embodiment, the first power unit 7 adopts a motor, and its power output end is connected with a leading screw 8, and the leading screw 8 is connected to the welding bracket 3. A conventional effective connection is realized to ensure that the first power device 7 drives the lead screw 8 to rotate, and the lead screw 8 can pull the welding bracket 3 to move along the axis of the lead screw 8 through its own rotation.

There is a travel switch on the bracket 1, the travel switch is set on the bracket 1 at the starting point and the end point of the welding bracket 3, through the induction of the welding bracket 3 at these two positions, to control the front and back of the first power device Rotate to realize the reciprocating motion of welding bracket 3.

One side of the bracket 1 is fixedly provided with a contact carrier 5, which is a frame structure, and the crossbeam on the top is arranged horizontally, on the crossbeam is provided with the same distribution of solder spots on the workpiece, and There are fourteen contacts 51 with the same number of solder joints, and the number of contacts 51 arranged in a straight line shown in the figure is fourteen, that is to say, there are also fourteen solder joints on the bracket. The contact switch 6 matched with the electric shock 51 is provided on the welding support 3, the contact switch 6 shown in the figure is arranged on the inverted L-shaped support 13, and the contact switch 6 is opposite to the welding support 3 in the process of moving with the welding support 3. The electric shocks 51 on the contact carrier 5 are sensed sequentially, and each time an electric shock 51 is sensed, the welding tongs 4 are energized so that the welding elements 12 weld the solder joints on the workpiece.

When in use, fix the two workpieces below the welding tongs 4, and ensure that the welding element 12 corresponds to one of the rows of welding spot positions on the workpiece. Drive the welding bracket 3 to move along the lead screw 8. During this movement, the contact switch 6 detects the position of the first contact 51, which means that the welding element 12 is just at the welding position of the first welding spot on the workpiece. , the welding tongs 4 are energized, and the welding spot on the workpiece is welded at this position. After the welding is completed, the first power unit 7 continues to drive the welding bracket 3 and the contact switch 6 to move. When the contact switch 6 senses the second electric shock During the position of 51, control the welding tongs 4 to be energized, and weld the solder spot on the workpiece at this position, and circulate like this until the welding of the last solder spot on the workpiece and on this row is completed. At this time, Welding bracket 3 moves to a terminal position closest to first power unit 7, and the travel switch positioned on bracket 1 detects the existence of welding bracket 3, and controls first power unit 7 to stop while starting second power unit 9, The whole bracket 1 is driven by the second power device 9 to slide along the slide rail 10. When the welding element 12 is slid to correspond to the position of another row of solder joints of the workpiece, the induction switch 11 senses the position of the bracket 1 and stops the second power device. 9. At the same time as the action, start the first power device 7 to reverse, and then drive the welding bracket 3 to weld another row of solder joints on the workpiece during the return process. The principle of action is the same as that of the first row of solder joints. , but the order of the contact switch 6 sensing contacts 51 is reversed.

In addition, the automatic spot welding machine structure in this embodiment can also realize the welding of workpieces with a single row of welding spots. At this time, in order to simplify the structure, the slide rail 10 and the second power unit 9 can be eliminated, and the bracket 1 and The bottom plate 2 can be fixedly connected. The welding principle is basically the same as the above-mentioned situation, and will not be repeated here.

Claims (8)

1. stitch welding machine welds a plurality of solder joints that are provided with that are in line of product, it is characterized in that:

Support (1), the location is arranged on the base plate (2);

Welding support (3); Be arranged on support (1) top; Be fixed with soldering turret (4) on it, described welding support (3) is under the driving of being fixed in first power set (7) on the support (1), and it is upward mobile at support (1) along the solder joint rectilinear direction of product to drive soldering turret (4);

The welding induction installation is responded in the welding position of solder joint soldering turret (4) in the moving process of welding support (3), and the solder joint to product welds in this position to start soldering turret (4).

2. stitch welding machine according to claim 1; It is characterized in that: the welding induction installation comprises the contact carrier (5) that is fixed on the support (1), is fixed on the contact-making switch (6) on the welding support (3); Described contact carrier (5) is provided with the contact (51) of the setting that is in line, identical with each number of welds of product and corresponding setting; Contact-making switch (6) is in welding support (3) moving process, and the solder joint to product welds in this position to start soldering turret (4) in the position of induction each get an electric shock (51).

3. stitch welding machine according to claim 1 and 2 is characterized in that: described first power set (7) link to each other with welding support (3) through the leading screw (8) that links to each other with its rotary power output.

4. stitch welding machine according to claim 3 is characterized in that: described first power set (7) are motor.

5. stitch welding machine according to claim 1 and 2 is characterized in that: described soldering turret (4) is for being fixed on two on the welding support (3).

6. stitch welding machine according to claim 1; It is characterized in that: described support (1) is under the driving of second power set (9); Slidably be arranged on the slide rail (10) that is fixed on the base plate (2), described slide rail (10) is vertical with the rectilinear direction of solder joint.

7. stitch welding machine according to claim 6 is characterized in that: described second power set (9) are cylinder, on cylinder, are provided with cylinder is promoted the inductive switch (11) that support (1) stroke is responded to.

8. according to claim 1 or 6 described stitch welding machines, it is characterized in that: on support (1), be provided with the travel switch that the stroke of welding support (3) is responded to.

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