Fixing device for CMT welding

Abstract

The utility model belongs to the technical field of CMT welding fixing devices, and particularly relates to a fixing device for CMT welding. The device comprises a supporting seat used for placing two workpiece raw material plates to be welded, calibration mechanisms capable of moving towards the workpiece raw material plates and clamping the workpiece raw material plates at the same time are symmetrically arranged on the two sides of the supporting seat, and the device further comprises a pair of fixing tools used for clamping the two workpiece raw material plates from the ends. The two fixing tools are both connected with the moving mechanism, so that the two fixing tools can move towards the workpiece raw material plate at the same time. The two fixing tools are further connected with the turnover mechanism. By arranging the calibration mechanism and the fixing tool, the welding stability of the welding parts is improved conveniently, and accurate butt joint of the welding parts is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of CMT welding technology, and in particular relates to a fixing device for CMT welding. Background Technology

[0002] CMT, or Cold Metal Transfer Welding, is a novel welding process that eliminates slag spatter. The unique aspect of CMT lies in its discontinuous wire feeding process during droplet transfer, utilizing two sets of wire feeding mechanisms. The wire arc ignites, and the droplet transitions into the molten pool. The moment the droplet enters the pool, the arc extinguishes, and the current decreases; the current short-circuits, and the wire begins to retract, promoting droplet detachment. The current approaches zero, and the droplet smoothly transitions into the molten pool. The arc continues to burn, and the droplet transitions into the pool. This welding process repeats the "cold-hot" cycle.

[0003] In existing CMT welding processes, the welded parts need to be fixed and clamped, usually by manual clamping or large fixing devices. However, manual clamping has poor stability, which can lead to poor welding results and make it difficult for two welded parts to be accurately aligned, increasing the risk of defective products. On the other hand, large fixing devices have poor flexibility and cannot accommodate welded parts of various sizes.

[0004] Therefore, there is an urgent need for a fixture for CMT welding to solve the above problems. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this invention provides a fixing device for CMT welding. By incorporating a calibration mechanism and fixing fixtures, this invention improves the stability of welding and ensures accurate mating of the welded parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fixing device for CMT welding includes a support base for placing two workpiece raw material plates to be welded, and calibrating mechanisms symmetrically provided on both sides of the support base for simultaneously moving toward and clamping the workpiece raw material plates. The device also includes a pair of fixing fixtures for clamping the two workpiece raw material plates from the ends. Both fixing fixtures are connected to a moving mechanism so that the two fixing fixtures can move toward the workpiece raw material plates simultaneously. The two fixing fixtures are also connected to a flipping mechanism.

[0008] Preferably, the calibration mechanism includes several clamping blocks arranged at intervals along both sides of the workpiece raw material plate and a double-headed, double-shafted cylinder connecting the clamping blocks on both sides, with the double-headed, double-shafted cylinder fixedly installed at the bottom end of the support base.

[0009] Preferably, the fixed fixture includes a fixed seat, a threaded rod rotatably mounted on the fixed seat, a torsion wheel rotatably mounted on the top of the threaded rod, a clamping seat slidably connected to the fixed seat, and a positioning seat fixedly mounted on the bottom of the fixed seat. The clamping seat is close to or away from the positioning seat to form a fixed structure for clamping or releasing the workpiece raw material plate.

[0010] Preferably, the device further includes a processing table, and the moving mechanism includes a bidirectional lead screw and a limiting rod arranged parallel to each other in the cavity of the processing table. One end of the bidirectional lead screw is connected to the transmission end of the first servo motor, and the flipping mechanism is mounted on the bidirectional lead screw and the limiting rod through a moving frame.

[0011] Preferably, the movable frame includes two opposing fixed plates and legs fixed to the bottom of the fixed plates, with the two legs at the bottom of the same fixed plate respectively sleeved on a bidirectional lead screw and a limiting rod; the flipping mechanism is mounted on the fixed plates.

[0012] Preferably, the device further includes a lifting assembly for a vertically movable support base. The lifting assembly includes a lifting cylinder installed in the processing table. The output end of the lifting cylinder is connected to a long strip plate. Connecting rods are symmetrically installed on the long strip plate. The support base is installed at the end of the connecting rod away from the long strip plate.

[0013] Preferably, the fixed base has movable grooves on both sides for limiting the position of the clamping base.

[0014] Preferably, the flipping mechanism includes a second servo motor and a movable cylinder. The second servo motor is mounted on one fixed plate, and the movable cylinder is mounted on the other fixed plate. The output end of the second servo motor is connected to the end of the fixed seat away from the threaded rod. The shaft end of the movable cylinder is connected to the back of the other fixed seat away from the end of the second servo motor.

[0015] The advantages of this utility model are:

[0016] (1) This utility model symmetrically sets up a fixed fixture, a calibration mechanism and a long strip plate between two fixed seats on the processing table. The support seat at the upper end of the long strip plate can support the pre-installation and fixing of the workpiece raw material plate. At the same time, the clamping block can provide horizontal calibration for the workpiece raw material plate placed on the support seat, so that the two workpiece raw material plates to be welded can be horizontally aligned and contacted, avoiding deviation at the welding point and improving the welding quality.

[0017] (2) By installing a second servo motor and a movable cylinder at two fixed seats respectively, the second servo motor can be driven to rotate the other side to weld when welding the surfaces of two sets of workpiece raw material plates, thereby improving the flexibility of welding. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the fixed base structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the processing table of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the long strip plate of this utility model.

[0022] The meanings of the symbols marked in the figure are as follows:

[0023] 1. Machining table; 2. Fixing plate; 21. Support leg; 22. Two-way lead screw; 23. Limiting rod; 24. First servo motor; 3. Second servo motor; 4. Fixing base; 41. Torsion wheel; 42. Clamping base; 43. Threaded rod; 44. Positioning base; 45. Movable groove; 5. Workpiece raw material plate; 6. Calibration mechanism; 61. Long strip plate; 62. Support base; 63. Connecting rod; 64. Double-headed double-axis cylinder; 65. Clamping block; 66. Lifting cylinder; 7. Movable cylinder. Detailed Implementation

[0024] like Figure 1-4 As shown, a fixing device for CMT welding includes a processing table 1 and fixing plates 2 symmetrically arranged on the processing table 1. Fixing fixtures are provided on both fixing plates 2, and a workpiece raw material plate 5 and a calibration mechanism 6 for calibrating the workpiece raw material plate 5 are provided between the two fixing fixtures.

[0025] The processing table 1 has an internal cavity for accommodating it;

[0026] A lifting assembly is installed within the accommodating cavity. The lifting assembly includes a lifting cylinder 66 and a long strip plate 61 fixedly mounted on the output end of the lifting cylinder 66. Connecting rods 63 are symmetrically mounted on the long strip plate 61. A support base 62 for supporting the workpiece raw material plate 5 is fixedly mounted on the end of the connecting rod 63 away from the long strip plate 61. The calibration mechanism 6 includes several clamping blocks 65 and a double-headed double-axis cylinder 64. Several clamping blocks 65 are symmetrically spaced along the length of each support base 62 on both sides. A double-headed double-axis cylinder 64 is mounted on the bottom end of the support base 62, and the two output ends of the double-headed double-axis cylinder 64 are respectively connected to the clamping blocks 65 on both sides.

[0027] Specifically, the long strip 61 is a rectangular structural plate. A support base 62 is installed at each end of the connecting rod 63 to provide support and calibration for the pre-welded workpiece raw material plate 5 before fixing. The calibration before fixing can provide high-quality welding efficiency for the workpiece welding and reduce the rework rate. The calibration is mainly achieved by using the clamping blocks 65 at both ends of the double-headed double-axis cylinder 64 to move closer to each other at the same time. The clamping blocks 65 contact and tighten the edge of the workpiece raw material plate 5 to achieve horizontal alignment.

[0028] The fixed fixture includes a fixed base 4, a threaded rod 43 rotatably connected to the fixed base 4, a torsion wheel 41 fixedly installed at the upper end of the threaded rod 43, a clamping seat 42 slidably connected to the fixed base 4, an movable groove 45 for limiting the clamping seat 42 on the fixed base 4, a positioning seat 44 opposite to the end of the fixed base 4 away from the clamping seat 42, and the clamping seat 42 and the threaded rod 43 are threaded together.

[0029] More specifically, after the workpiece material plate 5 is horizontally calibrated, the corresponding edges of the workpiece material plate 5 are clamped by the relatively distributed fixing seats 4. The clamping operation mainly involves placing one end of the workpiece material plate 5 on the upper end of the positioning seat 44 and rotating the torsion wheel 41. The clamping seat 42 moves closer to the positioning seat 44 to apply pressure to the upper surface of the workpiece material plate 5. The workpiece material plate 5 can be fixed by the cooperation between the positioning seat 44 and the clamping seat 42, so as to avoid shaking during subsequent welding and thus prevent welding failure.

[0030] A moving mechanism is also provided in the cavity of the processing table 1. The moving mechanism includes a bidirectional lead screw 22 and a limiting rod 23 arranged in parallel. A first servo motor 24 is installed on the outside of the processing table 1. The output end of the first servo motor 24 is fixedly connected to one end of the bidirectional lead screw 22, and the other end of the bidirectional lead screw 22 is rotatably connected to the inner wall of the processing table 1. The limiting rod 23 is fixedly installed inside the processing table 1. A moving frame is installed on the bidirectional lead screw 22 and the limiting rod 23. The moving frame includes two opposing fixed plates 2. The bottom of the fixed plates 2 is supported by feet 21.

[0031] It should be noted that the cavity opened in the processing table 1 is mainly used to install the bidirectional lead screw 22, the limiting rod 23, and the lifting cylinder 66 for the up and down movement of the long strip plate 61. When the bidirectional lead screw 22 is driven by the first servo motor 24, it will move along the bidirectional lead screw 22 with the support leg 21 installed below the fixed plate 2. The relatively distributed fixed plates 2 will move closer or further away from each other, so as to clamp and fix the workpiece raw material plates 5 of different lengths and specifications. The limiting rod 23 plays a stabilizing role for the fixed plate 2 during movement.

[0032] The support leg 21 on the side of the fixed plate 2 closest to the first servo motor 24 is threaded onto the bidirectional lead screw 22, and the support leg 21 on the side away from the first servo motor 24 is movably fitted onto the limiting rod 23. The second servo motor 3 is installed on the fixed plate 2 at the end closest to the first servo motor 24, and the output end of the second servo motor 3 is connected to the back of the fixed seat 4. The movable cylinder 7 is installed on the fixed plate 2 at the end away from the first servo motor 24, and the shaft end of the movable cylinder 7 is connected to the back of the fixed seat 4 at the end away from the first servo motor 24.

[0033] Both fixed fixtures are mounted on two fixed plates 2 respectively via a flipping mechanism. The flipping mechanism includes a second servo motor 3 and a movable cylinder 7 (which can also be replaced by a servo motor) distributed at both ends. The second servo motor 3 is mounted on one of the fixed plates 2, and the movable cylinder 7 is rotatably mounted on the other fixed plate 2. The output end of the second servo motor 3 is connected to the end of one of the fixed seats 4 away from the threaded rod 43. The shaft end of the movable cylinder 7 is connected to the end of the other fixed seat 4 away from the threaded rod 43.

[0034] When the joint on the surface of the workpiece material plate 5 is welded, it can be rotated to the other side by the drive of the second servo motor 3 to facilitate the welding of the back side. This flexible adjustment method avoids the workers from disassembling and flipping the two fixed workpiece material plates 5 to the other side, thus affecting the welding efficiency.

[0035] In use, a fixed plate 2, a fixed seat 4, and a long strip 61 located between two fixed seats 4 are symmetrically arranged on the processing table 1. The support seat 62 at the upper end of the long strip 61 can support the pre-installation and fixation of the workpiece raw material plate 5. At the same time, the clamping block 65 can provide horizontal calibration for the workpiece raw material plate 5 placed on the support seat 62. After the workpiece raw material plate 5 is calibrated and fixed by the clamping seat 42 and positioning seat 44 on the fixed seat 4, the lifting cylinder 66 is activated to retract the telescopic shaft with the long strip 61 downward to reduce the height. This avoids direct collision between the workpiece raw material plate 5 and the support seat 62 when it is flipped to the other side after welding on the upper surface of the workpiece raw material plate 5. Since the two workpiece raw material plates 5 have completed welding on one side and the ends of the workpiece raw material plates 5 are fixed on the fixed fixture, they can be flipped smoothly.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fixing device for CMT welding, characterized in that: The device includes a support base (62) for placing two workpiece raw material plates (5) to be welded. The support base (62) is symmetrically provided on both sides with calibration mechanisms (6) that can move towards and clamp the workpiece raw material plates (5) simultaneously. The device also includes a pair of fixing fixtures for clamping the two workpiece raw material plates (5) from the ends. Both fixing fixtures are connected to the moving mechanism so that the two fixing fixtures can move towards the workpiece raw material plates (5) simultaneously. The two fixing fixtures are also connected to the flipping mechanism.

2. The fixing device for CMT welding according to claim 1, characterized in that: The calibration mechanism (6) includes several clamping blocks (65) arranged at intervals along both sides of the workpiece raw material plate (5) and a double-headed double-axis cylinder (64) connecting the clamping blocks (65) on both sides. The double-headed double-axis cylinder (64) is fixedly installed at the bottom end of the support base (62).

3. The fixing device for CMT welding according to claim 1, characterized in that: The fixed fixture includes a fixed seat (4), on which a threaded rod (43) is rotatably provided. A torsion wheel (41) for rotatable threaded rod (43) is installed on the top of the threaded rod (43). A clamping seat (42) is slidably connected to the fixed seat (4), and a positioning seat (44) is fixedly installed on the bottom of the fixed seat (4). The clamping seat (42) is close to or away from the positioning seat (44) to form a fixed structure for clamping or releasing the workpiece raw material plate (5).

4. A fixing device for CMT welding according to claim 3, characterized in that: The device also includes a processing table (1), and the moving mechanism includes a bidirectional lead screw (22) and a limiting rod (23) arranged in parallel in the cavity of the processing table (1). One end of the bidirectional lead screw (22) is connected to the transmission end of the first servo motor (24). The flipping mechanism is mounted on the bidirectional lead screw (22) and the limiting rod (23) through a moving frame.

5. A fixing device for CMT welding according to claim 4, characterized in that: The movable frame includes two opposing fixed plates (2) and support legs (21) fixed to the bottom of the fixed plates (2). The two support legs (21) at the bottom of the same fixed plate (2) are respectively sleeved on the bidirectional lead screw (22) and the limiting rod (23); the flipping mechanism is installed on the fixed plate (2).

6. A fixing device for CMT welding according to claim 4, characterized in that: The device also includes a lifting assembly for a vertically movable support base (62), the lifting assembly including a lifting cylinder (66) installed in the processing table (1), the output end of the lifting cylinder (66) is connected to a long strip plate (61), connecting rods (63) are symmetrically installed on the long strip plate (61), and the support base (62) is installed at the end of the connecting rod (63) away from the long strip plate (61).

7. A fixing device for CMT welding according to claim 3, characterized in that: The fixed base (4) has movable grooves (45) on both sides for limiting the clamping base (42).

8. A fixing device for CMT welding according to claim 5, characterized in that: The flipping mechanism includes a second servo motor (3) and a movable cylinder (7). The second servo motor (3) is mounted on one of the fixed plates (2), and the movable cylinder (7) is mounted on the other fixed plate (2). The output end of the second servo motor (3) is connected to the end of the fixed seat (4) away from the threaded rod (43). The shaft end of the movable cylinder (7) is connected to the back of the other fixed seat (4) away from the end of the second servo motor (3).

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