Internal supporting clamp for manual welding

Abstract

The utility model belongs to the technical field of welding auxiliary equipment, and particularly relates to an internal support clamp for manual welding, which comprises a main shaft, one end of the main shaft is fixedly connected with an equipment main shaft, the surface of the main shaft is provided with a thread part, and the thread part is in threaded connection with a sleeve nut assembly; the surface of the main shaft is further sleeved with a sliding core, the sliding core is provided with a center hole, and the size of the center hole is matched with that of the main shaft. The sliding core is further provided with a sliding groove used for installing the sliding block, a key groove a used for installing the guide key and a concave table used for placing the sleeve nut assembly. The sliding block is further connected with a base plate which tightly supports the inner wall of the workpiece. The circular seam automatic welding device is simple in structure and short in production period, solves the technical problems of high cost and long manufacturing period of automatic inner supporting, and is very suitable for circular seam automatic welding of single small-batch cylinder parts.

Description

Technical Field

[0001] This utility model belongs to the technical field of welding auxiliary equipment, specifically relating to an internal support clamp for manual welding. Background Technology

[0002] In the production process of a certain workpiece, welding equipment is needed to weld two sections together. Since the inner diameter of the workpiece is small and the quantity is small, it belongs to single-piece small-batch production. The cost of using automated internal support tooling is high and the manufacturing cycle is long, which cannot meet the production schedule requirements. Therefore, a manual internal support fixture is urgently needed. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a manual welding internal support fixture, which is a simple tooling for supporting the inner wall of the workpiece near the weld when performing small inner diameter circumferential weld welding on the main shaft of welding equipment. It is especially suitable for single-piece and small-batch production in situations where it is not easy to use an automatic support device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A manual welding internal support fixture includes a spindle, one end of which is fixedly connected to the main spindle of a machine. The spindle surface has a threaded portion, to which a sleeve nut assembly is threadedly connected. A sliding core is also fitted onto the spindle surface, the sliding core having a central hole whose size matches the spindle size. The sliding core also has a groove for mounting a slider, a keyway a for mounting a guide key, and a recess for placing the sleeve nut assembly. The slider is further connected to a pad that supports the inner wall of the workpiece. The sliding core has inclined surfaces of the same angle connected to the slider, and the pad is connected to the slider using screws.

[0006] Specifically, the main shaft is also provided with a keyway b for mounting a guide key. The guide key is fixedly connected to the keyway b by screws and positioned on the main shaft by the keyway a of the slide core. A helical structure and a corresponding flat key are used to convert the rotational motion of the nut into the linear motion of the slide core. Then, a slanted structure is used to convert the linear motion of the slide core along the axial direction into the radial motion of the slide.

[0007] Specifically, the slide groove is provided in 4 places, and the number of sliders corresponds to the number of slide cores.

[0008] Specifically, the slider is provided with a T-shaped platform, the shape and size of which match the shape and size of the groove.

[0009] Specifically, a retaining ring is also provided at the other end of the main shaft. Due to the limitation of the retaining ring, the sliding motion of the slider can only be converted into a telescopic motion along the radial direction of the retaining ring.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] (1) This utility model can quickly connect to the main shaft of the welding equipment to support the inner diameter of small cylindrical workpieces to achieve circumferential welding of the workpieces. The fixture is relatively simple, the production cycle is short and the cost is low. Workpieces with other inner diameters can be supported by simply changing the pad or slider. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the device of this utility model.

[0013] Figure 2 This is a three-dimensional schematic diagram of the sliding core of this utility model.

[0014] Figure 3 This is a three-dimensional schematic diagram of the slider of this utility model.

[0015] Figure 4 This is a structural diagram of the main shaft of this utility model.

[0016] Figure 5 This is a three-dimensional schematic diagram of the pad of this utility model.

[0017] Figure 6 This is a three-dimensional schematic diagram of the retaining ring of this utility model;

[0018] In the diagram: 1. Workpiece; 2. Retaining ring; 2-1. Slide groove; 3. Screw a; 4. Guide key; 5. Sliding core; 6. Slider; 7. Pad; 8. Screw b; 9. Washer; 10. Screw c; 11. Semicircular retaining ring; 12. Sleeve nut assembly; 13. Spindle; 14. Bolt; 15. Equipment spindle; 16. Screw d; 17. Screw e; 4-1. Keyway b; 4-2. Screw hole dd; 4-3. Threaded part; 2-2. Lightening hole; 2-3. Center hole; 2-4. Screw hole a; 2-5. Keyway a; 2-6. Recess; 3-1. Screw hole b; 3-2. T-shaped platform; 3-3. Screw hole c; 3-4. Cylindrical surface; 4-4. Through hole; 4-5. Positioning boss; 4-6. Screw hole e; Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] Example:

[0021] like Figures 1 to 6 As shown, this embodiment provides a manually operated internal support welding fixture. The mechanical structure of this utility model is as follows: Figures 1-6As shown, the device consists of a retaining ring 2, screw a3, guide key 4, sliding core 5, slider 6, pad 7, screw b8, washer 9, screw c10, semi-circular retaining ring 11, sleeve nut assembly 12, main shaft 13, bolt 14, screw d16, and screw e17. Workpiece 1 is a partial schematic model 15 of the main shaft. This invention uses bolt 14 to connect to the main shaft 15. Four sliders 6 are respectively installed in T-slots on corresponding sliding cores 5, and four pads 7 are respectively installed on the corresponding sliders 6 using screw b8. A certain gap is provided between the four pads to ensure that this invention can extend and retract freely.

[0022] Slippery core 5 Figure 2 As shown, the fixture includes four sliding grooves 2-1, a weight-reducing hole 2-2, a center hole 2-3, a screw hole a2-4, a keyway a2-5, and a recess 2-6. The sliding groove 2-1 is used for the sliding of the slider 6 and is set at a certain angle. Since this fixture is mounted on the main shaft of the equipment, forming a cantilever structure, the weight-reducing hole 2-2 is provided to reduce weight. The center hole 2-3 is used to cooperate with the main shaft 13 to ensure the coaxiality of this invention. The screw hole 2-4 is used to connect with the semi-circular retaining ring, and the keyway a2-5 is used to accommodate the guide key 4, ensuring that the sliding core 5 moves linearly back and forth along the main shaft 13. The recess 2-6 is used to place the washer 9 and the sleeve nut assembly 12.

[0023] Slider 6 Figure 3 As shown, the device includes a screw hole b3-1, a T-shaped platform 3-2, a screw hole c3-3, and a cylindrical surface 3-4. Screw hole b3-1 is used to install screw e17, allowing it to make slight contact with the retaining ring 2 within the oblong hole. The T-shaped platform 3-2 is installed within the slide groove 2-1, enabling it to slide along the inclined surface of the slide groove 2-1. Due to the limiting motion of the retaining ring 2, the sliding motion of the slider 6 can only be converted into a retractable motion along the radial direction of the retaining ring. Four pads 7 are placed on the cylindrical surfaces 3-4 of their respective sliders 6 and connected to the sliders 6 as a whole by screws b8 screwed into screw holes c3-3.

[0024] Figure 4 The spindle shown is provided with a keyway b4-1, a screw hole d4-2, a threaded part 4-3, a through hole 4-4, a positioning boss 4-5, and a screw hole e4-6. The keyway b4-1 is used to install the guide key 4, the screw hole d4-2 is used to install the screw a3, the threaded part 4-3 is used to convert the rotational motion of the sleeve nut assembly 12 into linear motion, thereby driving the sliding core 5 to perform forward and backward feeding motion, and the through hole 4-4 and the positioning boss 4-5 are used for the connection and positioning of this utility model with the equipment spindle. Figure 5 As a backing plate, a seam line 5-1 is provided in the middle of the weld groove. Figure 6 The retaining ring is connected to the spindle 13 by screwing screw d16 into the screw hole e4-6 on the spindle 13.

[0025] In specific implementation, such as Figure 1As shown, first install the sleeve nut 12 on the main shaft 13, then install the washer 9. Next, install the guide key 4 in the keyway b4-1 on the main shaft 13 using screw a3. Then, align the keyway a2-5 of the slide core 5 with the guide key 4 and install it on the main shaft 13. Next, install the four sliders 6 on the slide core 5. Then, install the retaining ring 2 on the main shaft 13 using screw d16. Finally, screw e17 onto the main shaft 13 by hand through the retaining ring 6. Next, install the pad 7 on the corresponding slider 6 using screw b8. Finally, install the two semi-circular retaining rings 11 on the slide core 5 using screw c10.

[0026] When using this invention for welding, first mount it onto the main shaft 15 of the equipment using the positioning bosses 4-5, and then connect it to the main shaft 15 using bolts 14. Rotate the sleeve nut assembly 12 counterclockwise to retract the invention to its smallest diameter at the weld seam, and then sequentially insert it into the left and right parts of the workpiece, ensuring the weld seam is aligned with the workpiece's diameter. Figure 5 Align the weld seam line 5-1 in the middle of the weld groove on the pad, and then rotate the sleeve nut assembly 12 clockwise to tighten the inner wall of the workpiece. Finally, after adjusting the welding parameters and the position and angle of the welding torch, the circumferential weld of the workpiece can be achieved by rotating the main shaft 15 of the equipment. After welding, rotate the sleeve nut 12 counterclockwise to retract the workpiece to its smallest state, and then remove the welded workpiece from the left. If welding is not required, unscrew the bolt 14 and remove the workpiece from the main shaft 16 of the equipment.

[0027] This invention employs a slanted structure. The sliding core has four inclined surfaces of the same angle connected to the slider. Four pads are connected to the slider with screws, and a helical structure converts the rotational motion of the nut into the linear motion of the slider core. The slanted structure further converts the linear motion of the slider core along the axial direction into the radial motion of the slider, thus achieving the tightening and loosening of the workpiece. This invention can quickly connect to the main shaft of welding equipment to tighten the inner diameter of small cylindrical workpieces, enabling circumferential welding. The fixture is relatively simple, the production cycle is short, and the cost is low. Workpieces with other inner diameters can be tightened simply by changing the pads or sliders.

[0028] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A manual welding internal support fixture, comprising a main shaft (13), one end of which is fixedly connected to a machine main shaft (15), characterized in that, The main shaft (13) has a threaded part on its surface, and a sleeve nut assembly (12) is threadedly connected to the threaded part; a sliding core (5) is also fitted on the surface of the main shaft (13), and the sliding core (5) has a center hole (2-3), the size of which matches the size of the main shaft (13); the sliding core (5) also has a sliding groove (2-1) for installing the slider (6), a keyway a (2-5) for installing the guide key (4), and a recess (2-6) for placing the sleeve nut assembly (12); the slider (6) is also connected to a pad (7) for supporting the inner wall of the workpiece.

2. The manual welding internal support fixture according to claim 1, characterized in that, The spindle (13) is also provided with a keyway b for mounting a guide key (4). The guide key (4) is fixedly connected to the keyway b by screws and positioned on the spindle (13) by the keyway a (2-5) of the slide core (5).

3. The manual welding internal support fixture according to claim 1, characterized in that, The slide groove (2-1) is provided in 4 places, and the number of the sliders (6) corresponds to the number of the slide cores (5).

4. The manual welding internal support fixture according to claim 3, characterized in that, The slider (6) is provided with a T-shaped platform, the shape and size of which match the shape and size of the groove (2-1).

5. The manual welding internal support fixture according to claim 1, characterized in that, The other end of the main shaft (13) is also provided with a retaining ring (2).

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