Electric servo control arc welding device and welding method

Abstract

The invention discloses an electric servo control arc welding device and method. The welding device comprises a supporting frame, a product clamp used for positioning and clamping a product to be welded, a driving mechanism, a first welding gun and a second welding gun. The product clamp is installed on the supporting frame. The first welding gun and the second welding gun are oppositely arranged; the driving mechanism is installed on the supporting frame and located on the two sides of the to-be-welded product, the driving mechanism drives the first welding gun and the second welding gun to be close to or away from the to-be-welded product in the first movement direction in the horizontal plane, and the driving mechanism drives the first welding gun and the second welding gun to move in the second movement direction in the horizontal plane. The driving mechanism is arranged to drive the first welding gun and the second welding gun to be close to and away from the to-be-welded product in the first movement direction in the horizontal plane, and the distance between the first welding gun and the second welding gun and a welding seam is adjusted; and the driving mechanism drives the first welding gun and the second welding gun to move in the second movement direction in the horizontal plane for welding, so that the product quality is improved, the welding efficiency is improved, the labor intensity of workers is reduced, and the equipment cost is reduced. The welding method disclosed by the invention realizes automatic welding of products.

Description

Technical Field

[0001] The invention relates to the technical field of arc welding, and in particular to an electric servo-controlled arc welding device. Background Art

[0002] Inert gas shielded welding is a melting welding method that uses an electric arc as a heat source. In the field of traditional automobile manufacturing, scattered short weld technology is usually used in car body production, which is mainly used for welding of floor panels or lower body parts. Automobile body components are mostly special-shaped parts with relatively complex structures. One type of punching and welding components has two parallel straight welds on both sides of the product to be welded, and there is a shielding structure above the weld, so that the weld is located in the vertical projection area of ​​the shielding structure, and the welding gun can only be extended from the side for welding. The existing manual welding method has unstable product quality, low welding efficiency, and high labor intensity; the robot welding method has the problem of high cost; therefore, it is necessary to design a welding device to realize automatic welding. Summary of the invention

[0003] The present invention provides an electric servo controlled arc welding device to solve the above technical problems.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] An electric servo-controlled arc welding device comprises: a support frame, a product fixture for positioning and clamping a product to be welded, a driving mechanism, a first welding gun and a second welding gun;

[0006] The product fixture is installed on the support frame;

[0007] The first welding gun and the second welding gun are arranged opposite to each other;

[0008] The driving mechanism is installed on the support frame and is located on both sides of the product to be welded. The driving mechanism drives the first welding gun and the second welding gun to approach and move away from the product to be welded along a first movement direction in a horizontal plane, and the driving mechanism drives the first welding gun and the second welding gun to move independently or synchronously along a second movement direction in the horizontal plane.

[0009] Preferably, the driving mechanism comprises a first driving component and a second driving component, the first driving component drives the first welding gun, and the second driving component drives the second welding gun;

[0010] The first driving component comprises a first transverse driver and a first longitudinal driver, the first transverse driver drives the first longitudinal driver to move along a first movement direction, and the first longitudinal driver drives the first welding gun to move along a second movement direction;

[0011] The second driving component includes a second transverse driver and a second longitudinal driver. The second transverse driver drives the second longitudinal driver to move along the first movement direction, and the second longitudinal driver drives the second welding gun to move along the second movement direction.

[0012] Preferably, the second welding gun moves in the same direction as the first welding gun and keeps synchronization.

[0013] Preferably, the first longitudinal drive adopts a linear module / servo electric cylinder / linear motor, and the second longitudinal drive adopts a linear module / servo electric cylinder / linear motor.

[0014] Preferably, the first transverse drive is a pneumatic cylinder / hydraulic cylinder / servo electric cylinder / electric push rod, and the second transverse drive is a pneumatic cylinder / hydraulic cylinder / servo electric cylinder / electric push rod.

[0015] Preferably, a first mounting frame is installed at the output end of the first longitudinal driver, and the first welding gun is installed on the first mounting frame; a second mounting frame is installed at the output end of the second longitudinal driver, and the second welding gun is installed on the second mounting frame.

[0016] Preferably, the first movement direction and the second movement direction are perpendicular to each other.

[0017] A welding method using an electric servo-controlled arc welding device comprises the following steps:

[0018] S1. Place the product to be welded on the product fixture, and the product fixture clamps the product to be welded;

[0019] S2, the first transverse driver drives the first longitudinal driver to move along the first movement direction close to the product to be welded, and the second transverse driver drives the second longitudinal driver to move along the first movement direction close to the product to be welded, so that the first welding gun and the second welding gun move to the welding starting position;

[0020] S3, the first longitudinal driver drives the first welding gun to move along the second movement direction, and the second longitudinal driver drives the second welding gun to move along the second movement direction, the movement trajectories of the first welding gun and the second welding gun are both kept parallel to the weld, and the first welding gun and the second welding gun are powered on to perform welding during the movement;

[0021] S4, after welding is completed, the first transverse driver drives the first longitudinal driver to move along the first movement direction away from the welded product, and the second transverse driver drives the second longitudinal driver to move along the first movement direction away from the welded product, so that the first welding gun and the second welding gun return to their initial positions;

[0022] S5. The welded product is removed from the position where the first welding gun and the second welding gun are away, thereby completing the product welding.

[0023] Beneficial effects:

[0024] First, the electric servo-controlled arc welding device disclosed in the present application drives the first welding gun and the second welding gun along the first movement direction in the horizontal plane to approach and move away from the product to be welded by setting a driving mechanism, so as to adjust the distance between the first welding gun and the second welding gun and the weld; and the driving mechanism drives the first welding gun and the second welding gun to move along the second movement direction in the horizontal plane for welding, which greatly improves product quality, improves welding efficiency, reduces employee labor intensity, and reduces equipment costs.

[0025] Second, the present application discloses a welding method using an electric servo-controlled arc welding device to achieve automated welding of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 This is a schematic structural diagram of an electric servo-controlled arc welding device disclosed in Example 1 of the present invention.

[0028] 1. Support frame; 2. Product fixture; 31. First transverse driver; 32. First longitudinal driver; 33. Second transverse driver; 34. Second longitudinal driver; 35. First mounting frame; 36. Second mounting frame; 41. First welding gun; 42. Second welding gun. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] An electric servo controlled arc welding device, such as Figure 1As shown, it includes: a support frame 1, a product fixture 2 for positioning and clamping the product to be welded, a driving mechanism, a first welding gun 41 and a second welding gun 42; the product fixture 2 is installed on the support frame 1, and the product fixture 2 is a prior art in the field of automobile manufacturing, which is not described in detail here; the first welding gun 41 and the second welding gun 42 are arranged opposite to each other; the driving mechanism is installed on the support frame 1 and is located on both sides of the product to be welded, the driving mechanism drives the first welding gun 41 and the second welding gun 42 to approach and move away from the product to be welded along a first movement direction in a horizontal plane, and the driving mechanism drives the first welding gun 41 and the second welding gun 42 to move independently or synchronously along a second movement direction in the horizontal plane. The present application sets a driving mechanism to drive the first welding gun 41 and the second welding gun 42 to move closer to and away from the product to be welded along a first movement direction in a horizontal plane, thereby adjusting the distance between the first welding gun 41 and the second welding gun 42 and the weld; and enables the driving mechanism to drive the first welding gun 41 and the second welding gun 42 to move along a second movement direction in the horizontal plane for welding, thereby enabling the first welding gun 41 and the second welding gun 42 to weld independently or collaboratively, thereby greatly improving product quality, improving welding efficiency, reducing employee labor intensity, and reducing equipment costs.

[0032] Preferably, the first movement direction and the second movement direction are perpendicular to each other. In this embodiment, the lateral left and right movement is the first movement direction, and the longitudinal front and back movement is the second movement direction, so as to ensure that the first movement direction is perpendicular to the direction of the weld and the second movement direction is parallel to the direction of the weld.

[0033] Preferably, the driving mechanism comprises a first driving component and a second driving component, the first driving component drives the first welding gun 41, and the second driving component drives the second welding gun 42;

[0034] The first driving component includes a first transverse driver 31 and a first longitudinal driver 32, the first transverse driver 31 drives the first longitudinal driver 32 to move along a first movement direction, and the first longitudinal driver 32 drives the first welding gun 41 to move along a second movement direction;

[0035] The second driving component includes a second transverse driver 33 and a second longitudinal driver 34. The second transverse driver 33 drives the second longitudinal driver 34 to move along the first movement direction, and the second longitudinal driver 34 drives the second welding gun 42 to move along the second movement direction.

[0036] The first transverse driver 31 and the second transverse driver 33 drive the first longitudinal driver 32 and the second longitudinal driver 34 to open the first welding gun 41 and the second welding gun 42 to make room for the loading of the products to be welded and the unloading of the welded products.

[0037] Preferably, the second welding gun 42 moves in the same direction as the first welding gun 41 and keeps synchronization to ensure that the welds on both sides are welded synchronously. This allows the welds on both sides to be melted and connected at the same time, effectively shortening the time required for welding and improving production efficiency. At the same time, the welding parameters (including heat input, cooling rate, etc.) are kept consistent to ensure the consistency of weld quality and performance. In addition, since the welds on both sides are far apart, welding deformation can be effectively managed by accurately controlling the welding parameters. Therefore, production efficiency is significantly improved, product quality consistency is enhanced, and production costs are reduced. This technology is particularly suitable for large-scale production environments in the automotive field.

[0038] Preferably, the first longitudinal driver 32 adopts a linear module / servo electric cylinder / linear motor, and the second longitudinal driver 34 adopts a linear module / servo electric cylinder / linear motor.

[0039] Preferably, the first transverse driver 31 is a pneumatic cylinder / hydraulic cylinder / servo electric cylinder / electric push rod, and the second transverse driver 33 is a pneumatic cylinder / hydraulic cylinder / servo electric cylinder / electric push rod.

[0040] Preferably, a first mounting frame 35 is installed at the output end of the first longitudinal driver 32 , and the first welding gun 41 is installed on the first mounting frame 35 ; a second mounting frame 36 is installed at the output end of the second longitudinal driver 34 , and the second welding gun 42 is installed on the second mounting frame 36 .

[0041] Specifically, the first mounting frame 35 and the second mounting frame 36 each include: a mounting plate, a support rod and a mounting seat. The support rod is vertically arranged on the upper surface of the mounting plate, and the bottom end of the support rod is fixed to the mounting plate by welding; the top end of the support rod is fixedly connected to the lower surface of the mounting seat by welding, and the support rod supports the mounting seat to ensure horizontality. The mounting seats on the first mounting frame 35 and the second mounting frame 36 are provided with a welding gun clamping mechanism for mounting the first welding gun 41 and the second welding gun 42. The welding gun clamping mechanism is a prior art and will not be described in detail here.

[0042] Specifically, in this embodiment, the driving mechanism is controlled by a PLC system. The following description will take the example that the first longitudinal driver 32 and the second longitudinal driver 34 both use linear modules, and the first transverse driver 31 and the second transverse driver 33 use double guide rod cylinders.

[0043] The mounting plates of the first mounting frame 35 and the second mounting frame 36 are respectively fixed on the slides of the first longitudinal driver 32 and the second longitudinal driver 34 by screws; the bodies of the first mounting frame 35 and the second mounting frame 36 are respectively fixed on the cylinder fixing plates of the first transverse driver 31 and the second transverse driver 33 by screws; the cylinder bodies of the first transverse driver 31 and the second transverse driver 33 are both fixed on the support frame 1 by screws. The PLC system sends instructions to control the servo motor and the double guide rod cylinder of the linear module. The double guide rod cylinder moves smoothly and has high repetition accuracy, realizing high-precision control of the two welding guns; the servo motors of the two linear modules can easily realize independent or synchronous movements, which is convenient for precise control, and the linear module can ensure that the two welding guns move synchronously and the movement trajectory is parallel to the weld. The servo motor outputs power smoothly, the first mounting frame 35 and the second mounting frame 36 adopt an I-shaped structure design, and the overall structure is firm. The welding gun does not shake during the movement process and the arc starting and arc ending process of welding, and the quality of the weld can be guaranteed.

[0044] Example 2

[0045] A welding method using the electric servo-controlled arc welding device of embodiment 1 comprises the following steps:

[0046] S1. Place the product to be welded on the product fixture. The sensor of the product fixture senses that the product to be welded is in place and then clamps the product to be welded.

[0047] S2, the PLC system issues a command control, the first transverse driver drives the first longitudinal driver to move along the first movement direction close to the product to be welded, and the second transverse driver drives the second longitudinal driver to move along the first movement direction close to the product to be welded, so that the first welding gun and the second welding gun move to the welding starting position; after the movement is in place, the PLC system issues a command control valve body control gas circuit to lock the first transverse driver and the second transverse driver to lock the welding gun position;

[0048] S3, the PLC system issues a command control, the first longitudinal driver drives the first welding gun to move along the second movement direction, the second longitudinal driver drives the second welding gun to move along the second movement direction, the movement trajectories of the first welding gun and the second welding gun are kept parallel to the weld, and the first welding gun and the second welding gun are powered on for welding during the movement; according to the length and position of the welds on both sides of the product, the first welding gun and the second welding gun can be controlled to move synchronously or independently for welding;

[0049] S4. After welding is completed, the PLC system issues a command control, the first transverse driver drives the first longitudinal driver to move along the first movement direction away from the welded product, and the second transverse driver drives the second longitudinal driver to move along the first movement direction away from the welded product, so that the first welding gun and the second welding gun return to their initial positions;

[0050] S5. The welded product is removed from the position where the first welding gun and the second welding gun are away, thereby completing the product welding.

[0051] Finally, it should be noted that 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 they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric servo-controlled arc welding device, characterized in that: include: A support frame (1), a product fixture (2) for positioning and clamping a product to be welded, a driving mechanism, a first welding gun (41) and a second welding gun (42); The product fixture (2) is installed on the support frame (1); The first welding gun (41) and the second welding gun (42) are arranged opposite to each other; The driving mechanism is mounted on the support frame (1) and is located on both sides of the product to be welded, the driving mechanism drives the first welding gun (41) and the second welding gun (42) to move closer to and away from the product to be welded along a first movement direction in a horizontal plane, and the driving mechanism drives the first welding gun (41) and the second welding gun (42) to move independently or synchronously along a second movement direction in the horizontal plane.

2. The electric servo-controlled arc welding device according to claim 1, characterized in that: The driving mechanism comprises a first driving component and a second driving component, the first driving component drives a first welding gun (41), and the second driving component drives a second welding gun (42); The first driving component comprises a first transverse driver (31) and a first longitudinal driver (32), wherein the first transverse driver (31) drives the first longitudinal driver (32) to move along a first movement direction, and the first longitudinal driver (32) drives the first welding gun (41) to move along a second movement direction; The second driving component comprises a second transverse drive (33) and a second longitudinal drive (34), wherein the second transverse drive (33) drives the second longitudinal drive (34) to move along a first movement direction, and the second longitudinal drive (34) drives the second welding gun (42) to move along a second movement direction.

3. The electric servo-controlled arc welding device according to claim 2, characterized in that: The second welding gun (42) moves in the same direction as the first welding gun (41) and maintains synchronization.

4. The electric servo-controlled arc welding device according to claim 2, characterized in that: The first longitudinal driver (32) adopts a linear module / servo electric cylinder / linear motor, and the second longitudinal driver (34) adopts a linear module / servo electric cylinder / linear motor.

5. The electric servo-controlled arc welding device according to claim 2, characterized in that: The first transverse drive (31) adopts a pneumatic cylinder / hydraulic cylinder / servo electric cylinder / electric push rod, and the second transverse drive (33) adopts a pneumatic cylinder / hydraulic cylinder / servo electric cylinder / electric push rod.

6. The electric servo-controlled arc welding device according to claim 4, characterized in that: A first mounting frame (35) is installed at the output end of the first longitudinal driver (32), and the first welding gun (41) is installed on the first mounting frame (35); a second mounting frame (36) is installed at the output end of the second longitudinal driver (34), and the second welding gun (42) is installed on the second mounting frame (36).

7. The electric servo-controlled arc welding device according to claim 2, characterized in that: The first moving direction and the second moving direction are perpendicular to each other.

8. A welding method using an electric servo-controlled arc welding device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Place the product to be welded on the product fixture, and the product fixture clamps the product to be welded; S2, the first transverse driver drives the first longitudinal driver to move along the first movement direction close to the product to be welded, and the second transverse driver drives the second longitudinal driver to move along the first movement direction close to the product to be welded, so that the first welding gun and the second welding gun move to the welding starting position; S3, the first longitudinal driver drives the first welding gun to move along the second movement direction, and the second longitudinal driver drives the second welding gun to move along the second movement direction, the movement trajectories of the first welding gun and the second welding gun are both kept parallel to the weld, and the first welding gun and the second welding gun are powered on to perform welding during the movement; S4, after welding is completed, the first transverse driver drives the first longitudinal driver to move along the first movement direction away from the welded product, and the second transverse driver drives the second longitudinal driver to move along the first movement direction away from the welded product, so that the first welding gun and the second welding gun return to their initial positions; S5. The welded product is removed from the position where the first welding gun and the second welding gun are away, thereby completing the product welding.

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