Circular tube workpiece welding clamp

Abstract

The utility model relates to the field of welding fixtures, in particular to a circular tube workpiece welding fixture which comprises a bottom plate. A worm gear is rotationally connected to the bottom plate, and a first driving mechanism for enabling the bottom plate to rotate is arranged on the bottom plate; a rack is slidably connected to the bottom plate in a left-right limiting mode through a limiting sliding groove formed in the bottom plate, and a second driving mechanism enabling the bottom plate to horizontally move left and right is arranged on the bottom plate. The top of the axis of the worm gear and the top of the rack are fixedly connected with a first n-shaped frame and a second n-shaped frame correspondingly, automatic clamping mechanisms are arranged in the first n-shaped frame and the second n-shaped frame correspondingly and used for clamping the round pipes correspondingly, and the first n-shaped frame and the second n-shaped frame are in a preset angle shape. Through cooperation of the mechanisms, the two clamped circular pipes are attached together at various angles to be welded. According to the device, two round pipes can be welded at various angles; and the two round pipes can be stably, efficiently and precisely welded together.

Description

Technical Field

[0001] The utility model relates to the field of welding fixture devices, in particular to a round tube workpiece welding fixture. Background Art

[0002] A fixture is a device used to fix the workpiece in the mechanical manufacturing process so that it occupies the correct position for construction or inspection. In a broad sense, any device used to quickly, conveniently and safely install the workpiece in any process can be called a fixture.

[0003] The fixture usually consists of a positioning element (to determine the correct position of the workpiece in the fixture), a clamping device, a tool guiding element (to determine the relative position of the tool and the workpiece or to guide the direction of the tool), an indexing device (to enable the workpiece to complete processing at several stations in one installation, which includes a rotary indexing device and a linear motion indexing device), a connecting element, and a clamping body (fixture base).

[0004] For example, the adjustable angle fixture for round pipe welding of Chinese patent application No. 201721047252.5 comprises: a base, a worm gear shaft (23) is connected to the center of the base (1) through a bearing (24), a fixing part (3) is connected to one side of the base through a fixing column (2), a control box (5) is installed on the base, a control button (22) is provided on the surface of the control box, a stepper motor (11) is installed on the upper surface of the base, the stepper motor is connected to a reducer (10), the reducer has a worm shaft (9), a worm (8) is connected to the worm shaft, a worm wheel (12) is connected to the worm shaft, an adjustment part (14) is fixedly connected to one side of the worm wheel, the lower surface of the adjustment part is slidably connected to the upper surface of the base through a sliding wheel (25), and an angle pointer (6) is installed on the fixing part through a fixing screw (7). The device is used for the adjustable angle fixture for round pipe welding.

[0005] The device has a defect that the two round tubes are fixed manually, and it is not easy to precisely fit the two round tubes together when aligning the welding position of the two round tubes. The reason is that after fitting the two round tubes together, the locking clamp needs to be twisted, and when the locking clamp is locked, the fitting position of the two round tubes is easy to loosen. For this reason, the present device is designed, which can precisely and stably keep the two round tubes at a preset angle for welding, and improve the efficiency of the clamp clamping the two round tubes. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the defects of the prior art. The utility model proposes a round tube workpiece welding fixture, which can accurately and stably weld two round tubes while maintaining a preset angle, thereby improving the efficiency of the fixture in clamping the two round tubes.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a round tube workpiece welding fixture, comprising:

[0008] Base plate;

[0009] A worm gear is rotatably connected to the base plate, and a first driving mechanism for making it rotate by itself is arranged on the base plate;

[0010] A rack is connected to the base plate in a left - right limiting sliding manner through a limiting sliding groove opened thereon, and a second driving mechanism for making it move horizontally left and right is arranged on the base plate;

[0011] The top of the axis of the worm gear and the top of the rack are respectively fixedly connected with a first C - shaped frame and a second C - shaped frame. An automatic clamping mechanism is arranged in both the first C - shaped frame and the second C - shaped frame for clamping a circular tube respectively. The first C - shaped frame and the second C - shaped frame are in a preset angular shape. Through the cooperation of the above mechanisms, the two clamped circular tubes are attached to each other at various angles for welding operations.

[0012] Further, a support rod is fixedly connected to the bottom of the base plate.

[0013] Further, the first driving mechanism includes a first rotating column and a first stepping motor. A first rotating column is rotatably connected to the base plate. The top axis of the first rotating column is fixedly connected with a worm. The power output end of the first stepping motor is connected to the first rotating column. A third rotating column is rotatably connected to the base plate. The worm gear is fixedly connected to the top of the third rotating column. The worm gear meshes with the worm.

[0014] Further, the second driving mechanism includes a second stepping motor and a second rotating column. A second rotating column is rotatably connected to the base plate. The outer wall of the second rotating column is fixedly connected with a gear. The gear meshes with the rack. The power output end of the second stepping motor is connected to the second rotating column.

[0015] Further, the automatic clamping mechanism includes a cylinder and a lower clamp head. The inner top of the first C - shaped frame and the second C - shaped frame is fixedly connected with a cylinder. The telescopic end of the cylinder is fixedly connected with an upper clamp head. The inner bottom of the first C - shaped frame and the second C - shaped frame is fixedly connected with a lower clamp head. The upper clamp head and the lower clamp head fix the circular tube.

[0016] Further, V - shaped grooves are opened on the sides of the upper clamp head and the lower clamp head that are close to each other.

[0017] Further, side plates are fixedly connected to the front and rear sides of the base plate.

[0018] Compared with the prior art, the beneficial effects of the present utility model include:

[0019] Two circular tubes can be welded at various angles;

[0020] It can enable two circular tubes to be welded together stably, efficiently and precisely. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0022] Figure 1 Schematically shows a top view structural diagram of a device according to an embodiment of the present utility model;

[0023] Figure 2 Schematically shows a front view structural diagram of a device according to an embodiment of the present utility model;

[0024] Figure 3 Schematically shows a side view structural diagram of a first C-shaped frame of a device according to an embodiment of the present utility model.

[0025] Reference numerals in the figure: 1, base plate; 2, worm; 3, first rotating column; 4, side plate; 5, worm gear; 6, first C-shaped frame; 7, limit chute; 8, rack; 9, second rotating column; 10, gear; 11, second C-shaped frame; 12, support rod; 13, first stepping motor; 14, second stepping motor; 15, first circular tube to be welded; 16, lower chuck; 17, cylinder; 18, upper chuck; 19, third rotating column; 20, second circular tube to be welded. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] It is easy to understand that according to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can propose various structural ways and implementation ways that can be mutually replaced. Therefore, the following detailed embodiments and the accompanying drawings are only illustrative descriptions of the technical solution of the present utility model, and should not be regarded as all of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0027] Example:

[0028] As Figure 1-3 shown, this device is an improvement based on the circular tube welding adjustable angle fixture with Chinese patent application number 201721047252.5. The above patent fixes the circular tube manually, and then when adjusting the welding angle of the two circular tubes, it is also necessary to manually hold the circular tube to the preset position for welding operation. The inventor believes that such efficiency is not high enough. In order to improve the clamping efficiency of the fixture for two circular tubes, this device is designed.

[0029] Both bottom sides of the bottom plate 1 are fixedly connected with support rods 12, and both front and rear sides of the bottom plate 1 are fixedly connected with side plates 4.

[0030] A first rotating column 3 is rotatably connected to the bottom plate 1. A worm 2 is fixedly connected to the top center of the first rotating column 3. A first stepping motor 13 is fixedly installed at the bottom of the bottom plate 1. The power output end of the first stepping motor 13 is connected to the first rotating column 3. A third rotating column 19 is rotatably connected to the top of the bottom plate 1. A worm gear 5 is fixedly connected to the top of the third rotating column 19. The worm 2 meshes with the worm gear 5.

[0031] A limiting sliding groove 7 is formed at the top of the bottom plate 1. A rack 8 is slidably connected to the left and right in the limiting sliding groove 7. The axis of the limiting sliding groove 7 and the axis of the worm gear 5 are not on the same line, that is, the rack 8 and the worm gear 5 have a certain slope and form a certain angle. A second rotating column 9 is rotatably connected to the bottom plate 1. A gear 10 is fixedly connected to the outer wall of the second rotating column 9. The gear 10 meshes with the rack 8. A second stepping motor 14 is fixedly installed at the bottom of the bottom plate 1. The power output end of the second stepping motor 14 is connected to the second rotating column 9.

[0032] A first C-shaped frame 6 and a second C-shaped frame 11 are respectively fixedly connected to the top center of the worm gear 5 and the top of the rack 8. Cylinders 17 are fixedly connected to the inner tops of the first C-shaped frame 6 and the second C-shaped frame 11. The telescopic ends of the cylinders 17 are fixedly connected with upper clamping heads 18. Lower clamping heads 16 are fixedly connected to the inner bottoms of the first C-shaped frame 6 and the second C-shaped frame 11. The two groups of upper clamping heads 18 and lower clamping heads 16 fix the two round tubes. V-shaped grooves are formed on the sides of the upper clamping heads 18 and the lower clamping heads 16 close to each other for pressing the round tubes. The upper clamping head 18 and the lower clamping head 16 on the first C-shaped frame 6 press the second round tube to be welded 20. The lower clamping head 16 and the upper clamping head 18 on the second C-shaped frame 11 press the first round tube to be welded 15.

[0033] In specific implementation, first, determine the welding angle between the second round pipe to be welded 20 and the first round pipe to be welded 15, and then start the first stepping motor 13 to make the first C-shaped frame 6 maintain a preset angle. Place the second round pipe to be welded 20 on the lower clamp 16 on the first C-shaped frame 6 at a preset position, and then start the cylinder 17 on the first C-shaped frame 6 to make the upper clamp 18 on the first C-shaped frame 6 press on the top of the second round pipe to be welded 20, so that the upper clamp 18 and the lower clamp 16 on the first C-shaped frame 6 clamp the second round pipe to be welded 20 tightly and press it at the preset position of the second round pipe to be welded 20. Then place the first round pipe to be welded 15 on the lower clamp 16 on the second C-shaped frame 11, and clamp the first round pipe to be welded 15 tightly through the upper clamp 18. At this time, in order to make the second round pipe to be welded 20 and the first round pipe to be welded 15 fit together, start the second stepping motor 14 at this time. Through the meshing cooperation of the rack 8 and the gear 10, make the first round pipe to be welded 15 gradually move towards the second round pipe to be welded 20. The second stepping motor 14 can accurately control the first round pipe to be welded 15 to move to one side, so that the second round pipe to be welded 20 and the first round pipe to be welded 15 can fit together at a preset angle, which is convenient for welding the two round pipes.

[0034] The technical scope of the present utility model is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present utility model, and these deformations and modifications should all fall within the protection scope of the present utility model.

Claims

1. Round tube workpiece welding fixture, characterized in that: Including: Base plate (1); A worm gear (5) is rotatably connected to the base plate (1), and a first driving mechanism for making it rotate by itself is arranged on the base plate (1); A rack (8) is connected to the base plate (1) through a limiting sliding groove (7) opened thereon for left - right limiting sliding connection, and a second driving mechanism for making it move horizontally left and right is arranged on the base plate (1); A first C - shaped frame (6) and a second C - shaped frame (11) are respectively fixedly connected to the top of the axis of the worm gear (5) and the top of the rack (8). An automatic clamping mechanism is arranged in both the first C - shaped frame (6) and the second C - shaped frame (11) for clamping a circular tube respectively. The first C - shaped frame (6) and the second C - shaped frame (11) are in a preset angular shape. Through the cooperation of the above - mentioned mechanisms, the two clamped circular tubes are attached to each other at various angles for welding operations.

2. The round tube workpiece welding fixture according to claim 1, characterized in that: A support rod (12) is fixedly connected to the bottom of the base plate (1).

3. The round tube workpiece welding fixture according to claim 2, characterized in that: The first driving mechanism includes a first rotating column (3) and a first stepping motor (13). A first rotating column (3) is rotatably connected to the base plate (1). The top axis of the first rotating column (3) is fixedly connected with a worm (2). The power output end of the first stepping motor (13) is connected to the first rotating column (3). A third rotating column (19) is rotatably connected to the base plate (1). The worm gear (5) is fixedly connected to the top of the third rotating column (19). The worm gear (5) meshes with the worm (2).

4. The round tube workpiece welding fixture according to claim 1, characterized in that: The second driving mechanism includes a second stepping motor (14) and a second rotating column (9). A second rotating column (9) is rotatably connected to the base plate (1). A gear (10) is fixedly connected to the outer wall of the second rotating column (9). The gear (10) meshes with the rack (8). The power output end of the second stepping motor (14) is connected to the second rotating column (9).

5. The round tube workpiece welding fixture according to claim 1, characterized in that: The automatic clamping mechanism includes a cylinder (17) and a lower clamp head (16). The cylinder (17) is fixedly connected to the inner top of the first C - shaped frame (6) and the second C - shaped frame (11). The telescopic end of the cylinder (17) is fixedly connected with an upper clamp head (18). The lower clamp head (16) is fixedly connected to the inner bottom of the first C - shaped frame (6) and the second C - shaped frame (11). The upper clamp head (18) and the lower clamp head (16) fix the circular tube.

6. The round tube workpiece welding fixture according to claim 5, characterized in that: V - shaped grooves are opened on the sides of the upper clamp head (18) and the lower clamp head (16) that are close to each other.

7. The round tube workpiece welding fixture according to claim 1, characterized in that: Side plates (4) are fixedly connected to the front and rear sides of the base plate (1).

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