Annular laser welding clamping device

Abstract

The utility model discloses an annular laser welding clamping device which comprises a base plate, a main clamping assembly, a movable frame and an auxiliary clamping assembly, the main clamping assembly is fixedly connected to the base plate, the movable frame is located at the end, away from the main clamping assembly, of the base plate, the movable frame is detachably connected with the base plate, and the auxiliary clamping assembly is fixedly connected to the base plate. The auxiliary clamping assembly is fixedly connected with the movable frame. The workpiece is clamped through cooperation of the main clamping assembly and the auxiliary clamping assembly, if a weld joint is dislocated or inclined in the welding process, the universal joint arranged in the auxiliary clamping assembly can rotate by a corresponding angle to conduct fine adjustment on the workpiece, and then the situation that the weld joint is dislocated or inclined is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to an annular laser welding clamping device. Background Art

[0002] Laser welding is a welding method that uses a high-energy-density laser beam as a heat source. Laser welding is often used for welding small precision parts because of its advantages such as small metallographic changes in the heat-affected zone, minimal deformation caused by heat conduction, and the ability to weld two metals with different physical properties (such as different resistances).

[0003] In the existing annular laser welding process, due to the insufficient precision of the fixture itself, for example, each time the three-jaw chuck is clamped, it seems that the welded part is in the center position, but in fact, there is a slight deviation in the center of the clamp each time. In the case of this deviation, if the contact surface of the two welded parts is large, its influence can be ignored. However, when the contact surface of the two welded parts is small, due to the slight deviation of the axis, when the welded parts are in contact and squeezed by the external force in the axis direction, when the cylindrical welding structure rotates, the position of the weld formed by the two welding structures will form a slight tilt, which is obviously unacceptable for some welding with high precision requirements.

[0004] In view of this, there is an urgent need for an annular laser welding clamping device that can solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a ring laser welding clamping device to solve the above problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solution: a ring-shaped laser welding clamping device, comprising:

[0007] The main clamping assembly is fixedly connected to the base plate, the movable frame is located at one end of the base plate away from the main clamping assembly, and the movable frame is detachably connected to the base plate, and the auxiliary clamping assembly is fixedly connected to the movable frame.

[0008] Preferably, the movable frame includes a bottom plate and a supporting plate, the bottom plate is fixedly connected to the base plate by bolts, a convex slide groove is provided on the bottom plate, and a convex sliding block slidably connected to the convex slide groove is provided at the bottom of the supporting plate.

[0009] Preferably, the auxiliary clamping assembly includes an L-shaped connecting frame, a mounting cylinder, a universal joint and an auxiliary clamp. The L-shaped connecting frame is fixedly connected to the support plate, and a mounting hole is provided at the upper end of the vertical plate body of the L-shaped connecting frame. The mounting cylinder is movably connected in the mounting hole. One end of the universal joint is fixedly connected to the side wall of the mounting cylinder close to the main clamping assembly, and the other end is fixedly connected to the auxiliary clamp.

[0010] Preferably, a side of the secondary clamp away from the universal joint is provided with a plurality of indentations with different diameters.

[0011] Preferably, a cylinder fixedly connected to one end of the base plate away from the main clamping assembly is provided, and a telescopic rod of the cylinder is fixedly connected to the supporting plate.

[0012] Preferably, the cylinder controller is provided with a cylinder control machine PLC connected thereto.

[0013] Preferably, a pressure sensor is provided on the support plate 31 .

[0014] Preferably, the main clamping assembly includes a fixed seat and a three-jaw chuck with a bearing connected to the fixed seat, the three-jaw chuck is located at one end of the fixed seat close to the auxiliary clamping assembly, and the three-jaw chuck is provided with a motor matching therewith.

[0015] Compared with the prior art, the beneficial effect of the utility model is that the workpiece is clamped by the cooperation of the main clamping assembly and the auxiliary clamping assembly. When there is a deviation between the three-jaw chuck and the axis of the mounting cylinder during welding, the universal joint provided in the auxiliary clamping assembly adjusts the pressure applied to the weld by rotating at a corresponding angle, thereby avoiding the problem of weld tilt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of an annular laser welding clamping device;

[0017] Figure 2 It is a structural schematic diagram of the auxiliary clamping assembly in the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the movable frame in the utility model.

[0019] In the figure: 1, base plate; 10, cylinder; 2, main clamping assembly; 20, fixed seat; 21, three-jaw chuck; 22, motor; 3, movable frame; 30, bottom plate; 300, convex slide groove; 31, support plate; 310, convex slider; 4, auxiliary clamping assembly; 40, L-shaped connecting frame; 400, mounting hole; 41, mounting cylinder; 42, universal joint; 43, auxiliary fixture; 430, concave notch. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Please refer to the attached Figure 1-3 , a ring-shaped laser welding clamping device, comprising:

[0022] A base plate 1, a main clamping component 2, a movable frame 3 and a secondary clamping component 4, wherein the main clamping component 2 is fixedly connected to the base plate 1, the movable frame 3 is located at an end of the base plate 1 away from the main clamping component 2, and the movable frame 3 is detachably connected to the base plate 1, and the secondary clamping component 4 is fixedly connected to the movable frame 3.

[0023] The two workpieces to be welded are clamped and fixed by the cooperation of the main clamping assembly 2 and the auxiliary clamping assembly 4, and the two welded workpieces are butt-jointed by the movable frame 3 to facilitate subsequent laser welding.

[0024] Specifically, the movable frame 3 includes a base plate 30 and a support plate 31, the base plate 30 is fixedly connected to the base plate 1 by bolts, the base plate 30 is provided with a convex slide groove 300, and the bottom of the support plate 31 is provided with a convex slider 310 slidably connected to the convex slide groove 300; the base plate 30 is fixed to the base plate 1 by bolts, and this method can effectively control the distance between the base plate 30 and the main clamping assembly 2, that is, to perform corresponding adjustment and installation according to the length of the two workpieces to be welded, and the setting of the support plate 31 not only facilitates the replacement of the auxiliary clamping assembly 4 thereon, but also can complete the docking of the weld positions of the two workpieces to be welded by adjusting the position of the support plate 31 after the auxiliary clamping assembly 4 is installed.

[0025] Specifically, the auxiliary clamping assembly 4 includes an L-shaped connecting frame 40, a mounting cylinder 41, a universal joint 42 and an auxiliary clamp 43. The L-shaped connecting frame 40 is fixedly connected to the support plate 31, and a mounting hole 400 is provided at the upper end of the vertical plate body of the L-shaped connecting frame 40. The mounting cylinder 41 is movably connected in the mounting hole 400. One end of the universal joint 42 is fixedly connected to the side wall of the mounting cylinder 41 close to the main clamping assembly 2, and the other end is fixedly connected to the auxiliary clamp 43. By installing the universal joint 42 on the auxiliary clamp 43 and the L-shaped connecting frame 40, the auxiliary clamping assembly 4 has an automatic fine-tuning function. There are currently two main usage methods, one of which is a three-jaw chuck 2 When the sub-clamp 43 and the mounting cylinder 41 are not coaxial, if the sub-clamp 43 is not properly changed, when the two welded parts are in contact, due to the force of the three-jaw chuck 21 and the sub-clamp 43 on the welded parts, a slight tilt crack will appear between the welded parts, affecting the accuracy of the welded parts. Therefore, a universal joint 42 is set between the sub-clamp 43 and the mounting cylinder 41. When the above situation occurs, the universal joint 42 will change its angle according to the reverse force of the sub-clamp 43, and then calibrate the direction of the torque applied by the mounting cylinder 41 to the sub-clamp 43 through the universal joint 42, so as to ensure that the welding machine is balanced in force, thereby avoiding the situation where cracks appear in the welded parts. In the above action, the universal joint 42 itself has the freedom of rotation;

[0026] The second is that some parts have special requirements. For example, the contact surfaces of two welding workpieces need to have an angle of 5 degrees. The universal joint 42 can be adjusted in advance and fixed to limit its free rotation. This way, the two welding workpieces can form a 5-degree angle on the contact surfaces each time they are docked. When different welding requirements arise, it is only necessary to adjust the universal joint 42 accordingly without the need to re-customize the corresponding fixture. In the above case, a locking pin that limits the freedom of the existing universal joint 42 needs to be added.

[0027] Specifically, the auxiliary clamp 43 is provided with a plurality of concave notches 430 of different diameters on the side away from the universal joint 42; the concave notches 430 provided in the auxiliary clamp 43 enable it to adapt to a variety of different workpieces to be welded, thereby reducing the frequency of replacement of the universal joint 42 and indirectly reducing the human resources required for adjusting the universal joint.

[0028] Specifically, the substrate 1 is provided with a cylinder 10 fixedly connected to the main clamping assembly 2 at one end thereof, and the telescopic rod of the cylinder 10 is fixedly connected to the support plate 31; considering the precision characteristics of laser welding, if the support plate 31 is directly adjusted manually to complete the docking of the welds of the two workpieces to be welded, it is easy for the force to be unable to be accurately controlled, resulting in deflection, dislocation or even damage at the welds of the two workpieces to be welded, and therefore the cylinder 10 is used to replace manpower to complete this task.

[0029] Specifically, the cylinder 10 controller is provided with a cylinder control machine PLC connected thereto; by programming the PLC, the cylinder 10 can be controlled on the PLC to achieve the purpose of precise adjustment of the cylinder 10.

[0030] Specifically, a pressure sensor is provided on the support plate 31; during docking, the pressure sensor can transmit data to the cylinder control machine PLC for pressure feedback to avoid a situation where the weld is too large due to the lack of contact between the two welding workpieces.

[0031] Specifically, the main clamping assembly 2 includes a fixed seat 20 and a three-jaw chuck 21 connected to the fixed seat 20 by a bearing, the three-jaw chuck 21 is located at one end of the fixed seat 20 close to the auxiliary clamping assembly 4, and the three-jaw chuck 21 is provided with a motor 22 matching it; the main clamping assembly 2 mainly functions to fix the workpiece to be welded and to provide power for the rotation of the workpiece, wherein the fixation is through the three-jaw chuck 21, and it can also be a four-jaw chuck or a chuck with similar functions, and the motor 22 provides the three-jaw chuck 21 with power for rotation. It should be noted that the position of the motor 22 is not fixed, it can be set outside the fixed seat 20, or it can be installed inside the fixed seat 20, as long as it can drive the three-jaw chuck 21 to rotate. At the same time, it should be emphasized that the center of the three-jaw chuck 21 and the center of the mounting cylinder 41 must be on the same horizontal line.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ring-shaped laser welding clamping device, characterized in that: include: A base plate (1), a main clamping assembly (2), a movable frame (3) and a secondary clamping assembly (4), wherein the main clamping assembly (2) is fixedly connected to the base plate (1), the movable frame (3) is located at one end of the base plate (1) away from the main clamping assembly (2), and the movable frame (3) is detachably connected to the base plate (1), and the secondary clamping assembly (4) is fixedly connected to the movable frame (3).

2. The annular laser welding clamping device according to claim 1, characterized in that: The movable frame (3) comprises a bottom plate (30) and a supporting plate (31); the bottom plate (30) is fixedly connected to the base plate (1) by means of bolts; a convex sliding groove (300) is provided on the bottom plate (30); and a convex sliding block (310) slidably connected to the convex sliding groove (300) is provided at the bottom of the supporting plate (31).

3. The annular laser welding clamping device according to claim 2 is characterized in that: The auxiliary clamping assembly (4) comprises an L-shaped connecting frame (40), a mounting cylinder (41), a universal joint (42) and an auxiliary clamp (43); the L-shaped connecting frame (40) is fixedly connected to the support plate (31), and a mounting hole (400) is provided at the upper end of the vertical plate body of the L-shaped connecting frame (40); the mounting cylinder (41) is movably connected in the mounting hole (400); one end of the universal joint (42) is fixedly connected to a side wall of the mounting cylinder (41) close to the main clamping assembly (2), and the other end is fixedly connected to the auxiliary clamp (43).

4. The annular laser welding clamping device according to claim 3 is characterized in that: A plurality of indentations (430) with different diameters are provided on a side of the secondary clamp (43) away from the universal joint (42).

5. The annular laser welding clamping device according to claim 2, characterized in that: An end of the base plate (1) away from the main clamping assembly (2) is provided with a cylinder (10) fixedly connected thereto, and a telescopic rod of the cylinder (10) is fixedly connected to the support plate (31).

6. The annular laser welding clamping device according to claim 5, characterized in that: The cylinder (10) controller is provided with a cylinder control machine PLC connected thereto.

7. The annular laser welding clamping device according to claim 6, characterized in that: The support plate (31) is provided with a pressure sensor.

8. The annular laser welding clamping device according to claim 1, characterized in that: The main clamping assembly (2) comprises a fixed seat (20) and a three-jaw chuck (21) whose bearing is connected to the fixed seat (20); the three-jaw chuck (21) is located at one end of the fixed seat (20) close to the auxiliary clamping assembly (4), and the three-jaw chuck (21) is provided with a motor (22) matched therewith.

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