Clamp for automatic welding of a backing plate

Abstract

The utility model relates to a kind of clamps for automatic welding of backing plate, including pedestal, slider that is set on pedestal by guide rail translation sliding, drive cylinder for driving the translation of slider, respectively setting iron seat clamping mechanism A and iron seat clamping mechanism B on pedestal and slider;First limit and second limit are set on the pedestal, respectively for limiting the left and right translation position of the slider.The utility model ensures the stability of the two iron seats welded on backing plate a size, while meeting when switching product specifications, corresponding a size can be switched with different specifications of product.

Description

Technical Field

[0001] This utility model relates to a fixture for automatic welding of pads, belonging to the field of robotic automatic welding technology. Background Technology

[0002] When robotically welding railway base plate parts, the distance 'a' between the two iron bases being welded on the base plate must be accurate and stable. Furthermore, due to different product specifications, the distance 'a' may vary in two ways; see [reference needed]. Figure 1 Currently, in the traditional method, the robot picks up one iron base for welding and then picks up another iron base for welding, with the distance between the two iron bases maintained by the robot's teaching program. Due to the different batches of workpieces and poor dimensional consistency, it is difficult to guarantee a relatively stable positional dimension between the two iron bases.

[0003] Therefore, there is an urgent need for a fixture that can ensure the stability of the dimensions between the two iron seats for welding the backing plate and can meet the requirements for welding products that do not meet the specifications. Summary of the Invention

[0004] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a fixture for automatic welding of pads, which ensures the stability of dimension a between the two iron seats welded on the pad, and at the same time meets the requirement that the corresponding dimension a can be switched with different product specifications when switching product specifications.

[0005] The purpose of this utility model is achieved as follows: An automatic welding fixture for pads includes a base, a slider that is slidably mounted on the base via a guide rail, a drive cylinder mounted on the base for driving the slider to move, and iron seat clamping mechanism A and iron seat clamping mechanism B respectively mounted on the base and the slider; the base is provided with a first limit and a second limit, which are respectively used to limit the left and right translational positions of the slider.

[0006] Furthermore, a U-shaped limiting seat is provided on the base, and the first limiting seat and the second limiting seat correspond to the inner walls of the two U-shaped arms of the U-shaped limiting seat, respectively.

[0007] Furthermore, a protruding stop is installed on the slider, the stop being located between the two U-shaped arms of the U-shaped limiting seat.

[0008] Furthermore, a positioning block A with a first positioning surface is provided on the base, which cooperates with the iron seat clamping mechanism A to clamp the left iron seat and position the right side of the left iron seat.

[0009] Furthermore, the iron seat clamping mechanism A includes a clamping cylinder A and a clamping arm A driven by the clamping cylinder A to move closer to and clamp the positioning block A; an elastic pressure head A is provided on the clamping arm A to cooperate with the positioning block A to clamp the iron seat.

[0010] Furthermore, a positioning block B with a second positioning surface is provided on the slider, which cooperates with the iron seat clamping mechanism B to clamp the right iron seat and position the left side of the right iron seat.

[0011] Furthermore, the iron seat clamping mechanism B includes a clamping cylinder B and a clamping arm B driven by the clamping cylinder B to move closer to and clamp the positioning block B; an elastic pressure head B is provided on the clamping arm B to cooperate with the positioning block B to clamp the iron seat.

[0012] Furthermore, a connecting arm for connecting the robot is mounted on the base.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention features a slider driven by a cylinder, mounted on a base connected to a robot. Iron seat clamping mechanisms are installed on both the base and the slider. First and second limit switches on the base restrict the slider's left and right movement, allowing precise control of two distances between the base and the slider. This satisfies the stability and selectivity requirements of dimension 'a' between the two iron seats. An elastic pressure head on the iron seat clamping mechanism ensures stable clamping even under dimensional tolerances. The fixture has a simple overall structure, can clamp two iron seats simultaneously, and can flexibly switch between two dimension 'a' distances, ensuring stable and precise alignment of each dimension, thus meeting the precision requirements of automated robotic welding of pad-type parts. Attached Figure Description

[0014] Figure 1 A schematic diagram of the welding operation for pad-type parts.

[0015] Figure 2 This is a schematic diagram of the structure of a fixture for automatic welding of pads according to the present invention.

[0016] Figure 3 This is a schematic diagram of the slider structure of a fixture for automatic welding of pads according to this utility model.

[0017] in: Base 1, slider 2, drive cylinder 3, iron seat clamping mechanism A4, iron seat clamping mechanism B5, first limit 6, second limit 7, U-shaped limit seat 8, stop block 9, left iron seat 10, first positioning surface 11, positioning block A12, connecting arm 13, clamping cylinder A14, clamping arm A15, elastic pressure head A16, clamping cylinder B17, clamping arm B18, elastic pressure head B19, right iron seat 20, second positioning surface 21, positioning block B22. Detailed Implementation

[0018] See Figures 2-3The present invention relates to an automatic welding fixture for pads, comprising a base 1, a slider 2 that is slidably mounted on the base 1 via a guide rail, a drive cylinder 3 mounted on the base 1 for driving the slider 2 to move, and an iron seat clamping mechanism A4 and an iron seat clamping mechanism B5 respectively mounted on the base 1 and the slider 2; a connecting arm 13 for connecting a robot is mounted on the base 1. A positioning block A12 with a first positioning surface 11 is provided on the base 1, which cooperates with the iron seat clamping mechanism A4 to clamp and position the right side of the left iron seat 10. Specifically, the iron seat clamping mechanism A4 includes a clamping cylinder A14 and a clamping arm A15 driven by the clamping cylinder A14 to move towards and clamp the positioning block A12; an elastic pressure head A16 is provided on the clamping arm A15 to cooperate with the positioning block A12 to clamp the iron seat; Similarly, a positioning block B22 with a second positioning surface 21 is provided on the slider 2, which cooperates with the iron seat clamping mechanism B5 to clamp and position the left side of the right iron seat 20. Specifically, the iron seat clamping mechanism B5 includes a clamping cylinder B17 and a clamping arm B18 driven by the clamping cylinder B17 to move towards and clamp the positioning block B22; an elastic pressure head B19 is provided on the clamping arm B18 to cooperate with the positioning block B22 to clamp the iron seat; Elastic pressure heads are provided on the outer sides of the two iron seat clamping parts of the iron seat clamping mechanism A4 and the iron seat clamping mechanism B5, which can be used to fit iron seats with different size tolerances. However, since the positioning block A12 and the positioning block B22 are located on the inner side between the two iron seats, they will not cause a distance deviation between the iron seats. The base 1 is provided with a first limit 6 and a second limit 7, which are used to limit the left and right translational positions of the slider 2, respectively. In this embodiment, a U-shaped limit seat 8 is provided on the base 1, wherein the inner walls of the two U-shaped arms correspond to the first limit 6 and the second limit 7, respectively; a protruding stop 9 is installed on the slider 2, and the stop 9 is located between the two U-shaped arms of the U-shaped limit seat 8. When the drive cylinder 3 retracts, causing the slider 2 to translate to the left, the stop 9 abuts against the inner wall of the left arm of the U-shaped limit seat 8, i.e., the first limit 6; conversely, when the drive cylinder 3 extends, causing the slider 2 to translate to the right, the stop 9 abuts against the inner wall of the right side wall of the U-shaped limit seat 8, i.e., the second limit 7; When welding iron bases with pads, the robot uses the automatic pad welding fixture of this invention to simultaneously grip the left and right iron bases. The right side of the left iron base 10 abuts against the positioning block A12, and the left side of the right iron base 20 abuts against the positioning block B22, ensuring that the product dimensional tolerance does not affect the distance between the two iron bases. Then, by controlling the retraction or extension of the drive cylinder 3, the stop 9 of the slider 2 is positioned at the first limit 6 to obtain a small dimension 'a', or at the second limit 7 to obtain a large dimension 'a', achieving flexible switching between the two dimensions 'a'. Thanks to the above-mentioned limiting structure, coupled with the ability to grip two iron bases at once, the dimension 'a' between the two iron bases is ensured to be unaffected by product dimensional tolerances, different gripping sequences, or other factors, thus guaranteeing the stability of the dimension 'a'.

[0019] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A fixture for automatic welding of backing plates, characterized in that: It includes a base (1), a slider (2) that is slidably mounted on the base (1) via a guide rail, a drive cylinder (3) mounted on the base (1) for driving the slider (2) to move, and iron seat clamping mechanism A (4) and iron seat clamping mechanism B (5) respectively mounted on the base (1) and the slider (2); the base (1) is provided with a first limit (6) and a second limit (7) for limiting the left and right translation positions of the slider (2) respectively.

2. The fixture for automatic welding of backing plates according to claim 1, characterized in that: A U-shaped limiting seat (8) is provided on the base (1), and the first limiting seat (6) and the second limiting seat (7) correspond to the inner walls of the two U-shaped arms of the U-shaped limiting seat (8).

3. The fixture for automatic welding of backing plates according to claim 2, characterized in that: A protruding stop (9) is installed on the slider (2), and the stop (9) is located between the two U-shaped arms of the U-shaped limit seat (8).

4. The fixture for automatic welding of backing plates according to claim 1, characterized in that: A positioning block A (12) with a first positioning surface (11) is provided on the base (1) to cooperate with the iron seat clamping mechanism A (4) to clamp and position the right side of the left iron seat (10).

5. The fixture for automatic welding of backing plates according to claim 4, characterized in that: The iron seat clamping mechanism A (4) includes a clamping cylinder A (14) and a clamping arm A (15) driven by the clamping cylinder A (14) to move closer to the positioning block A (12) for clamping; an elastic pressure head A (16) is provided on the clamping arm A (15) to cooperate with the positioning block A (12) to clamp the iron seat.

6. The fixture for automatic welding of backing plates according to claim 1, characterized in that: A positioning block B (22) with a second positioning surface (21) is set on the slider (2), which cooperates with the iron seat clamping mechanism B (5) to clamp and position the left side of the right iron seat (20).

7. The fixture for automatic welding of backing plates according to claim 1, characterized in that: The iron seat clamping mechanism B (5) includes a clamping cylinder B (17) and a clamping arm B (18) driven by the clamping cylinder B (17) to move closer to the positioning block B (22) for clamping; an elastic pressure head B (19) is provided on the clamping arm B (18) to cooperate with the positioning block B (22) to clamp the iron seat.

8. The fixture for automatic welding of backing plates according to claim 1, characterized in that: The base (1) is equipped with a connecting arm (13) for connecting the robot.

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