Sheet electric arc welding device with movable clamping and micro-vibration assisting functions

Abstract

The invention belongs to the technical field of electric arc welding, and particularly relates to a movable clamping and micro-vibration assisting thin plate electric arc welding device which comprises a bottom plate, two welding frames which are in bilateral symmetry are fixedly connected to the upper end face of the bottom plate, and a metal thin plate is clamped between a clamping plate and the welding frames through rigid springs. The upper side of each metal sheet is provided with two triangular plates which are in bilateral symmetry, a rotating circular gear can drive a rubber anti-skid belt to rotate and drive a moving frame to move backwards through counter-acting force, the rubber anti-skid belt and a rigid spring can provide micro-vibration assisting conditions, and the lower end face of a moving plate is fixedly connected with two piezoelectric ceramic vibrators which are in bilateral symmetry. The piezoelectric ceramic vibrator is located on the upper sides of the two metal sheets and can drive the micro-vibration rod to conduct high-frequency micro-vibration, the rubber pad is fixedly connected to the lower end face of the micro-vibration rod, the piezoelectric ceramic vibrator can drive the rubber pad to conduct high-frequency micro-vibration on the joint of the two welded metal sheets, molten pool flowing is promoted, weld joint grains are refined, and the welding quality is improved. And welding stress is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of arc welding, and specifically to a thin plate arc welding device with mobile clamping and micro-vibration assistance. Background Art

[0002] In traditional arc welding, due to the concentrated heat input and large heat affected zone, it is easy to cause thermal deformation or even burn-through of the thin metal plate during arc welding. In the existing technologies, methods such as reducing the current and increasing the welding speed are mostly used, which are likely to affect the welding efficiency and quality. Moreover, most of the existing technologies are fixed clamping, making it difficult to implement high-frequency vibration assistance, and the concentrated micro-vibration and mobile clamping of the welding position are not perfect enough. Therefore, a thin plate arc welding device with mobile clamping and micro-vibration assistance is needed to replace the existing traditional thin metal plate arc welding device. Summary of the Invention

[0003] The purpose of the present invention is to provide a thin plate arc welding device with mobile clamping and micro-vibration assistance to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A thin plate arc welding device with mobile clamping and micro-vibration assistance, including a bottom plate. On the upper end surface of the bottom plate, two symmetrically arranged welding frames are fixedly connected. In each welding frame, a clamping plate is slidably connected up and down. Between the lower end surface of the clamping plate and the welding frame, four rigid springs are fixedly connected. The metal thin plate is clamped by the rigid springs between the clamping plate and the welding frame. The two metal thin plates are symmetrically arranged left and right. On the upper end surface of the bottom plate, two symmetrically arranged side plates are fixedly connected front and back. Between the side plates, two symmetrically arranged sliding rods are fixedly connected. A moving frame is slidably connected to the sliding rods front and back. On the upper side of each metal thin plate, two symmetrically arranged triangular plates are provided. The triangular plates are fixedly connected to the moving frame through two symmetrically arranged top plates front and back. Between the two triangular plates, three machine shafts are rotatably connected. Each machine shaft is fixedly connected with a circular gear located between the triangular plates. And between the triangular plates, a rubber anti-slip belt is provided. The inner side of the rubber anti-slip belt is fixedly connected with a gear chain. The gear chain meshes with the circular gear. The rubber anti-slip belt closely adheres to the upper end surface of the metal thin plate. Thus, by rotating the circular gear, the rubber anti-slip belt can be driven to rotate, and the moving frame can be driven to move backward by the reaction force. Moreover, the rubber anti-slip belt and the rigid springs can provide the conditions for micro-vibration assistance.

[0005] A moving plate is provided on the front side of the moving frame. The moving plate and the moving frame are fixedly connected by a plurality of connecting rods. Two piezoelectric ceramic vibrators that are symmetric left and right are fixedly connected to the lower end surface of the moving plate. The piezoelectric ceramic vibrators are located above the two metal thin plates. The piezoelectric ceramic vibrators are power-connected to micro-vibrating rods. The piezoelectric ceramic vibrators can drive the micro-vibrating rods to vibrate at high frequency. A rubber pad is fixedly connected to the lower end surface of the micro-vibrating rods. Thus, the piezoelectric ceramic vibrators can drive the rubber pad to perform high-frequency micro-vibration on the joint of the two welded metal thin plates, promote the flow of the molten pool, refine the weld grains, and reduce the welding stress.

[0006] Preferably, two hydraulic cylinders that are symmetric front and back are fixedly connected to the upper end surface of each welding frame. The hydraulic cylinders are all power-connected to hydraulic rods. Four limiting rods that are coaxially aligned with the rigid springs are fixedly connected to the lower end surface of the clamping plate. Four limiting cylinders that are slidably connected to the limiting rods up and down are fixedly connected to the welding frames. Thus, after the hydraulic cylinders drive the hydraulic rods to move downward and push the clamping plate to move downward, the metal thin plate can pass through the welding frame. After the hydraulic rods are moved upward, the rigid springs can drive the clamping plate to abut against the metal thin plate. Moreover, the rigidity coefficient of the rigid springs is large, and the clamping force is large.

[0007] Preferably, motors are fixedly connected to the two triangular plates corresponding to the upper side of each metal thin plate. The motors are power-connected to the upper machine shafts. The motors can drive the machine shafts to rotate, and thus can drive the moving frame to move backward.

[0008] Preferably, two moving frames that are symmetric left and right are fixedly connected. Two connecting plates that are symmetric left and right are slidably connected to the moving frames. A welding gun is fixedly connected to the connecting plates. The welding gun is electrically connected to a welding electrode. The electric push rod is power-connected to the connecting plates. Thus, the electric push rod can drive the welding electrode to move downward, so that after the welding electrode is consumed, it can always maintain the best welding distance from the metal thin plate.

[0009] Preferably, the welding gun is connected to the power supply and the controller through the second connecting wire, and the piezoelectric ceramic vibrators are connected to the power supply and the controller through the first connecting wire.

[0010] Preferably, two limiting frames that are symmetric left and right are fixedly connected to the upper end surface of the bottom plate. The limiting frames are both clamped with metal thin plates. Thus, the limiting frames support the other ends of the metal thin plates to prevent warping and keep them flat.

[0011] Preferably, an intelligent controller is fixedly connected to the upper end surface of the bottom plate. The intelligent controller controls the hydraulic cylinders, the electric push rods, the welding gun, and the piezoelectric ceramic vibrators.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] In the present invention, by providing a triangular plate, a rubber anti-slip belt and a moving frame, after the hydraulic cylinder drives the hydraulic rod to move downward to push the clamping plate to move downward and compress the rigid spring, the metal thin plate is passed through the limiting frame and placed in the welding frame. After the hydraulic rod moves upward, the rigid spring drives the clamping plate to clamp the metal thin plate. The rigidity coefficient of the rigid spring is relatively large. Cooperating with the motor to drive the rotation of the motor shaft, the circular gear cooperates with the gear chain to drive the rubber anti-slip belt to rotate, so that the entire moving frame moves along the joint of the two metal thin plates, realizing clamping and moving, and at the same time, conditions for micro-vibration assistance of the two metal thin plates can be formed.

[0014] In the present invention, by providing a piezoelectric ceramic vibrator, a rubber pad and a connecting rod, the piezoelectric ceramic vibrator is moved backward along with the backward movement of the moving frame through the connecting rod. Then, cooperating with the electric push rod to drive the welding gun and the welding rod to approach the metal thin plate as the welding rod is continuously consumed during arc welding, so that the lower end of the welding rod always maintains an appropriate distance from the metal thin plate. After welding, the piezoelectric ceramic vibrator drives the micro-vibration rod and the rubber pad to perform high-frequency micro-vibration on the welding part, promoting the flow of the molten pool, refining the weld grains, and reducing the welding stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0016] Figure 2 is Figure 1 the top view of

[0017] Figure 3 is Figure 2 the schematic cross-sectional view taken along A-A of

[0018] Figure 4 is Figure 2 the schematic cross-sectional view taken along B-B of

[0019] Figure 5 is Figure 3 the partial enlarged schematic diagram of

[0020] Figure 6 is Figure 4 the partial enlarged schematic diagram of

[0021] Figure 7 is a three-dimensional schematic diagram of the rigid spring part of the present invention;

[0022] Figure 8 is a three-dimensional schematic diagram of the piezoelectric ceramic vibrator part of the present invention;

[0023] Figure 9 is a three-dimensional schematic diagram of the rubber anti-slip belt part of the present invention.

[0024] In the figure: 100, bottom plate; 101, welding frame; 102, limiting frame; 103, metal thin plate; 104, intelligent controller; 105, hydraulic cylinder; 106, side plate; 107, sliding rod; 108, moving frame; 109, moving plate; 110, piezoelectric ceramic vibrator; 111, electric push rod; 112, clamping plate; 113, rubber anti-slip strip; 114, limiting cylinder; 115, limiting rod; 116, rigid spring; 117, hydraulic rod; 118, micro-vibrating rod; 119, welding rod; 120, welding gun; 121, first connecting wire; 122, connecting plate; 123, second connecting wire; 124, circular gear; 125, top plate; 126, rubber pad; 127, connecting rod; 128, triangular plate; 129, machine shaft; 130, gear chain; 131, motor. Detailed implementation manners

[0025] For better understanding of the present invention, the following examples are given in conjunction with the accompanying drawings. These examples belong to the protection scope of the present invention, but do not limit the protection scope of the present invention.

[0026] Example 1:

[0027] Please refer to Figures 1-9, the present invention provides a technical solution: a thin - plate arc welding device with mobile clamping and micro - vibration assistance, including a bottom plate 100. On the upper end surface of the bottom plate 100, two symmetrically arranged welding frames 101 are fixedly connected. In each welding frame 101, a clamping plate 112 is slidably connected up and down. Between the lower end surface of the clamping plate 112 and the welding frame 101, four rigid springs 116 are fixedly connected. A metal thin plate 103 is clamped between the clamping plate 112 and the welding frame 101 by the rigid springs 116. The two metal thin plates 103 are symmetrically arranged left and right. On the upper end surface of the bottom plate 100, two symmetrically arranged side plates 106 are fixedly connected front and back. Between the side plates 106, two symmetrically arranged sliding rods 107 are fixedly connected. A moving frame 108 is slidably connected to the sliding rods 107 front and back. On the upper side of each metal thin plate 103, two symmetrically arranged triangular plates 128 are provided. The triangular plates 128 are fixedly connected to the moving frame 108 through two symmetrically arranged top plates 125 front and back. Between the two triangular plates 128, three machine shafts 129 are rotatably connected. Each machine shaft 129 is fixedly connected with a circular gear 124 located between the triangular plates 128. And between the triangular plates 128, a rubber anti - slip belt 113 is provided. The inner side of the rubber anti - slip belt 113 is fixedly connected with a gear chain 130. The gear chain 130 meshes with the circular gear 124. The rubber anti - slip belt 113 closely adheres to the upper end surface of the metal thin plate 103. Thus, by rotating the circular gear 124, the rubber anti - slip belt 113 can be driven to rotate, and the moving frame 108 can be driven to move backward by the reaction force. And the rubber anti - slip belt 113 and the rigid springs 116 can provide conditions for micro - vibration assistance;

[0028] On the upper side of each metal thin plate 103, the two corresponding triangular plates 128 are fixedly connected with a motor 131. The motor 131 is power - connected to the upper machine shaft 129. The motor 131 can drive the machine shaft 129 to rotate, so as to drive the moving frame 108 to move backward.

[0029] Embodiment 2:

[0030] Please refer to Figures 1-9 , in order to promote the flow of the molten pool, refine the weld grains, and reduce the welding stress, a rubber pad 126 is provided;

[0031] A movable plate 109 is provided on the front side of the movable frame 108. The movable plate 109 is fixedly connected to the movable frame 108 by a plurality of connecting rods 127. Two piezoelectric ceramic vibrators 110 that are symmetric left and right are fixedly connected to the lower end surface of the movable plate 109. The piezoelectric ceramic vibrators 110 are located above the two metal thin plates 103. The piezoelectric ceramic vibrators 110 are power-connected to micro-vibrating rods 118. The piezoelectric ceramic vibrators 110 can drive the micro-vibrating rods 118 to vibrate at a high frequency. A rubber pad 126 is fixedly connected to the lower end surface of the micro-vibrating rods 118. Thus, the piezoelectric ceramic vibrators 110 can drive the rubber pad 126 to perform high-frequency micro-vibration on the joint of the two welded metal thin plates 103, promote the flow of the molten pool, refine the weld grains, and reduce the welding stress.

[0032] Two 11 that are symmetric left and right are fixedly connected to the movable frame 108. Two connecting plates 122 that are symmetric left and right are slidably connected to the movable frame 108. A welding gun 120 is fixedly connected to the connecting plates 122. The welding gun 120 is electrically connected to a welding rod 119. The electric push rod 111 is power-connected to the connecting plates 122. Thus, the electric push rod 111 can drive the welding rod 119 to move downward, so that after the welding rod 119 is consumed, it can always maintain the best welding distance from the metal thin plate 103.

[0033] The welding gun 120 is connected to a power source and a controller through the second connecting wire 123, and the piezoelectric ceramic vibrator 110 is connected to the power source and the controller through the first connecting wire 121.

[0034] Embodiment 3:

[0035] Please refer to Figures 1-9 , in order to clamp the metal thin plate 103 on the welding frame 101 conveniently, a hydraulic cylinder 105 is provided;

[0036] Two hydraulic cylinders 105 that are symmetric front and back are fixedly connected to the upper end surface of each welding frame 101. The hydraulic cylinders 105 are all power-connected to hydraulic rods 117. Four limiting rods 115 that are coaxially aligned with the rigid springs 116 are fixedly connected to the lower end surface of the clamping plates 112. Four limiting cylinders 114 that are slidably connected to the limiting rods 115 up and down are fixedly connected to the welding frames 101. Thus, when the hydraulic cylinders 105 drive the hydraulic rods 117 to move downward and push the clamping plates 112 to move downward, the metal thin plate 103 can pass through the welding frame 101. After the hydraulic rods 117 are moved upward, the rigid springs 116 can drive the clamping plates 112 to abut against the metal thin plate 103. Moreover, the rigidity coefficient of the rigid springs 116 is large, and the clamping force is large.

[0037] Embodiment 4:

[0038] Please refer to Figures 1-9 , in order to prevent the welding position of the larger metal sheet 103 from warping and ensure the flatness of the metal sheet 103 during welding, a limit frame 102 is provided;

[0039] Two symmetrically arranged limit frames 102 are fixedly connected to the upper end surface of the bottom plate 100. The limit frames 102 are both clamped with the metal sheet 103, so as to support the other end of the metal sheet 103 through the limit frames 102, avoid warping and maintain flatness;

[0040] An intelligent controller 104 is fixedly connected to the upper end surface of the bottom plate 100. The intelligent controller 104 controls the hydraulic cylinder 105, the electric push rod 111, the welding gun 120 and the piezoelectric ceramic vibrator 110.

[0041] Working principle:

[0042] First, start the hydraulic cylinder 105 through the intelligent controller 104. The hydraulic cylinder 105 drives the hydraulic rod 117 to move downward. The hydraulic rod 117 pushes the two clamping plates 112 to move downward, compressing the rigid spring 116. The limit rod 115 moves along the limit cylinder 114 to ensure the stability of the movement of the clamping plate 112. Then, after passing the metal sheet 103 through each limit frame 102 and the welding frame 101, the two metal sheets 103 are abutted against each other. After starting the hydraulic cylinder 105 to move the hydraulic rod 117 upward, the clamping plate 112 clamps the metal sheet 103 under the action of the rigid spring 116, realizing quick clamping;

[0043] Then start the welding gun 120 and the piezoelectric ceramic vibrator 110 through the intelligent controller 104. At the same time, the motor 131 drives the upper spindle 129 to rotate. The circular gear 124 drives the rubber anti-slip belt 113 to rotate. The reaction force drives the moving frame 108 to move backward. The welding rod 119 is arc welded with the metal sheet 103 under the action of current. As the welding rod 119 is consumed and shortened, the electric push rod 111 drives the welding gun 120 and the welding rod 119 to move downward, so that the lower end of the welding rod 119 maintains the most suitable welding distance from the metal sheet 103. Thus, when the moving frame 108 moves backward, arc welding with moving clamping of the two metal sheets 103 can be carried out, ensuring the stability of welding. At the same time, the piezoelectric ceramic vibrator 110 drives the micro-vibration rod 118 to vibrate at a high frequency, and the just-welded position is micro-vibrated at a high frequency under the protection of the rubber pad 126. The rubber anti-slip belt 113 and the rigid spring 116 reduce the rigidity of the metal sheet 103, ensuring a good micro-vibration effect, promoting the flow of the molten pool, refining the weld grains, and reducing the welding stress. Thus, micro-vibration assistance and moving clamping of thin plate arc welding are realized.

[0044] The above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It is not intended to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A thin plate arc welding device with mobile clamping and micro-vibration assistance, comprising a base plate (100), characterized in that: The upper end surface of the bottom plate (100) is fixedly connected to two left-right symmetrical welding frames (101), each of the welding frames (101) is slidably connected to a clamping plate (112) in an up-and-down manner, four rigid springs (116) are fixedly connected between the lower end surface of the clamping plate (112) and the welding frame (101), a metal sheet (103) is clamped between the clamping plate (112) and the welding frame (101) via the rigid springs (116), the two metal sheets (103) are left-and-right symmetrical, the upper end surface of the bottom plate (100) is fixedly connected to two front-and-back symmetrical side plates (106), two left-and-right symmetrical sliding rods (107) are fixedly connected between the side plates (106), and the sliding rods (107) are slidably connected to a moving frame (108) in a front-and-back manner, Two left-right symmetrical triangular plates (128) are arranged on the upper side of each metal sheet (103); the triangular plates (128) are fixedly connected to the movable frame (108) through two front-back symmetrical top plates (125); three machine shafts (129) are rotatably connected between the two triangular plates (128); each machine shaft (129) is fixedly connected to a circular gear (124) located between the triangular plates (128); and a rubber anti-slip belt (113) is arranged between the triangular plates (128); a gear chain (130) is fixedly connected to the inner side of the rubber anti-slip belt (113); the gear chain (130) is meshed with the circular gear (124); and the rubber anti-slip belt (113) is in close contact with the upper end surface of the metal sheet (103); A moving plate (109) is provided on the front side of the moving frame (108); the moving plate (109) is fixedly connected to the moving frame (108) via a plurality of connecting rods (127); two left-right symmetrical piezoelectric ceramic vibrators (110) are fixedly connected to the lower end surface of the moving plate (109); the piezoelectric ceramic vibrators (110) are located on the upper sides of the two metal thin plates (103); the piezoelectric ceramic vibrators (110) are dynamically connected to a micro-vibration rod (118); the piezoelectric ceramic vibrators (110) can drive the micro-vibration rod (118) to micro-vibrate at a high frequency; and the lower end surface of the micro-vibration rod (118) is fixedly connected to a rubber pad (126).

2. A thin plate arc welding device with mobile clamping and micro-vibration assistance according to claim 1, characterized in that: The upper end surface of each welding frame (101) is fixedly connected to two hydraulic cylinders (105) that are symmetrical in front and back, and the hydraulic cylinders (105) are dynamically connected to a hydraulic rod (117). The lower end surface of the clamping plate (112) is fixedly connected to four limit rods (115) that are coaxially aligned with the rigid spring (116), and the welding frame (101) is fixedly connected to four limit cylinders (114) that are slidably connected to the limit rods (115) up and down.

3. A mobile clamping and micro-vibration assisted thin plate arc welding device according to claim 2, characterized in that: The two triangular plates (128) corresponding to the upper side of each metal sheet (103) are fixedly connected to a motor (131), and the motor (131) is power-connected to the machine shaft (129) on the upper side, and the motor (131) can drive the machine shaft (129) to rotate.

4. A mobile clamping and micro-vibration assisted thin plate arc welding device according to claim 5, characterized in that: The movable frame (108) is fixedly connected to two symmetrical left and right 11s, the movable frame (108) is slidably connected to two symmetrical left and right connecting plates (122), the connecting plates (122) are fixedly connected to a welding gun (120), the welding gun (120) is electrically connected to a welding rod (119), and the electric push rod (111) is dynamically connected to the connecting plates (122).

5. A mobile clamping and micro-vibration assisted thin plate arc welding device according to claim 4, characterized in that: The welding gun (120) is connected to a power source and a controller via the second connecting line (123), and the piezoelectric ceramic vibrator (110) is connected to a power source and a controller via the first connecting line (121).

6. A mobile clamping and micro-vibration assisted thin plate arc welding device according to claim 5, characterized in that: The upper end surface of the bottom plate (100) is fixedly connected to two left-right symmetrical limiting frames (102), and the limiting frames (102) are both clamped with metal thin plates (103).

7. A mobile clamping and micro-vibration assisted thin plate arc welding device according to claim 6, characterized in that: An intelligent controller (104) is fixedly connected to the upper end surface of the base plate (100), and the intelligent controller (104) controls the hydraulic cylinder (105), the electric push rod (111), the welding gun (120) and the piezoelectric ceramic vibrator (110).

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