A welding jig for a base positioning rib

Abstract

The utility model provides a kind of welding fixture of frame locating rib, including jig and spacer ring.Spacers ring is spaced along the axial direction and is provided with mounting groove, and the mounting groove is used to accommodate locating rib, and the jig includes bottom plate, and the bottom plate is square, and the both ends of bottom plate are respectively connected with first clamping plate and second clamping plate, and the bottom plate, first clamping plate and second clamping plate are connected to form concave letter shape.First clamping plate and second clamping plate are respectively provided with first recess and second recess, and spacer ring extends into first recess and second recess, and first clamping plate and second clamping plate respectively clamp spacer ring, and the bottom plate is arranged on the inner side of spacer ring, and the bottom plate is screw-connected with first adjusting bolt, and the first adjusting bolt is arranged along the radial direction of spacer ring, and the first adjusting bolt is used to correct the installation error of locating rib along the radial direction of spacer ring.The utility model adjusts the radial dimension of locating rib by screwing first adjusting bolt, ensures the concentricity of locating rib, and improves the quality and production efficiency of generator stator.

Description

Technical Field

[0001] This utility model belongs to the field of generator base technology, specifically relating to a welding fixture for base positioning ribs. Background Technology

[0002] As a core component of large generators, the stator frame supports the iron core and transmits torque. Its assembly accuracy directly affects the generator's electromagnetic performance. Positioning ribs, as key components for core fixation, are susceptible to deformation if welded incorrectly, leading to vibration, noise, and reduced efficiency. Current positioning rib welding methods involve spot welding the ribs at equal chord intervals, relying on manual operation. This is insufficient for high-precision, high-efficiency production. Furthermore, the inability to flexibly adjust the ribs after spot welding results in poor accuracy and low efficiency, increasing manufacturing costs. Repeated adjustments during the welding process consume significant time and delay production.

[0003] Therefore, the above problems urgently need to be solved. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, this utility model provides a welding fixture for the positioning ribs of the generator base, which realizes the adjustment of the radial and chordal spacing of the positioning ribs, ensures the spacing and concentricity of the positioning ribs, improves the welding accuracy and production efficiency, reduces manufacturing costs, and improves the performance of the generator.

[0005] Technical Solution: To achieve the above objectives, this utility model provides a welding fixture for positioning ribs, including a fixture and a spacer ring. The spacer ring has circumferentially spaced mounting grooves, which are larger than the corresponding dimensions of the positioning ribs. The mounting grooves accommodate the positioning ribs. The fixture includes a base plate, which is square. A first clamping plate and a second clamping plate are connected to both ends of the base plate, forming a U-shape. The first clamping plate and the second clamping plate each have a first groove and a second groove, respectively. The spacer ring extends into the first groove and the second groove, and the first clamping plate and the second clamping plate clamp the spacer ring. The base plate is located inside the spacer ring and is threadedly connected to a first adjusting bolt. The first adjusting bolt is radially arranged along the spacer ring and is used to correct the installation error of the positioning ribs along the radial direction of the spacer ring. This utility model is used to adjust the positional accuracy of the positioning ribs. Before installation, the spacer ring is cut to the desired shape and mounting grooves using a laser cutting machine. During positioning rib installation, the spacer rings are arranged on the welding platform according to the design dimensions and fixed by spot welding. The positioning ribs are inserted into the mounting grooves, and the spacer rings are inserted into the first and second grooves. The spacer rings are clamped by the first and second clamping plates, fixing the fixture in the mounting groove position. Multiple fixtures are installed along the positioning ribs. Before adjustment, the radial dimensions of the positioning ribs are measured using a 3D laser scanner. Based on the test results, the first adjusting bolt is tightened to radially compress the positioning ribs along the spacer rings, ensuring that the positioning ribs are equidistant from the center of the spacer rings. After adjustment, the 3D laser scanner is used to mark points, and the measurements are repeated to ensure that the radial dimensions of the positioning ribs are qualified. This utility model adjusts the radial dimensions of the positioning ribs by tightening the first adjusting bolt, ensuring the concentricity of the positioning ribs, improving installation accuracy, improving the quality of the generator stator, improving adjustment efficiency, and improving production efficiency.

[0006] Furthermore, in the aforementioned welding fixture for the machine base positioning ribs, the first clamping plate includes a first clamping arm and a second clamping arm. The first clamping arm abuts against the spacer ring, and the second clamping arm is threadedly connected to a first clamping bolt. The first clamping bolt cooperates with the first clamping arm to clamp the spacer ring. The connection method between the fixture and the spacer ring is as follows: by tightening the first clamping bolt, the first clamping bolt applies a pushing force to the spacer ring, causing the first clamping arm to abut against the spacer ring, and the first clamping plate to clamp the spacer ring. The first clamping bolt, as a movable end, can adapt to spacer rings of different thicknesses, improving the adaptability of the fixture.

[0007] Furthermore, in the aforementioned welding fixture for the machine base positioning ribs, the second clamping plate and the first clamping plate are correspondingly arranged. The second clamping plate includes a third clamping arm and a fourth clamping arm. The third clamping arm abuts against the spacer ring, and the fourth clamping arm is threadedly connected to a second clamping bolt. The second clamping bolt cooperates with the third clamping arm to clamp the spacer ring. The second clamping plate also clamps the spacer ring by tightening the second clamping bolt, forming a double-position fixation with the first clamping bolt, improving the stability of the installation, preventing displacement during adjustment, and ensuring the accuracy of adjustment.

[0008] Furthermore, in the aforementioned welding fixture for the positioning ribs of the machine base, the first clamping arm is threadedly connected to a second adjusting bolt, the axis of which is perpendicular to the axis of the first adjusting bolt. The second adjusting bolt abuts against the upper side of the positioning rib (here, the upper side refers to the side of the positioning rib rotated clockwise along the axis of the spacer ring). The third clamping arm is threadedly connected to a third adjusting bolt, which abuts against the lower side of the positioning rib (here, the lower side refers to the other side of the positioning rib relative to its upper side). The second and third adjusting bolts are arranged facing each other, and they cooperate to adjust the spacing between adjacent positioning ribs. The positioning ribs are arranged in an array along the axis of the spacer ring. If the chord spacing of adjacent positioning ribs is inconsistent, the second and third adjusting bolts are tightened to correct the chord spacing of adjacent positioning ribs, realizing individual adjustment of the chord direction of the positioning ribs and improving the flexibility of adjustment.

[0009] Furthermore, in the aforementioned welding fixture for the machine base positioning ribs, the first adjusting bolt, the second adjusting bolt, and the third adjusting bolt are all designed as fine-threaded bolts. Using fine-threaded bolts improves the adjustment accuracy.

[0010] Furthermore, in the aforementioned welding fixture for the positioning ribs of the machine base, the first adjusting bolt is arranged along the center line of the first clamping plate and the second clamping plate, and there are one or more first adjusting bolts. Having two or more first adjusting bolts can enhance the stability of the radial correction of the positioning ribs.

[0011] Furthermore, in the aforementioned welding fixture for the base positioning ribs, the base plate is provided with through grooves, which are symmetrically arranged on both sides of the first adjusting bolt. The through grooves can reduce the weight of the fixture, improve its lightweight design, and also provide space for welding operations, preventing interference between the welding torch and the fixture.

[0012] Furthermore, in the aforementioned welding fixture for the machine base positioning ribs, the first clamping arm has a first pattern on the side near the second clamping arm, and the third clamping arm has a second pattern on the side near the fourth clamping arm. The first and second patterns can be vertical stripes, or they can be grid patterns, diamond patterns, etc. The first and second patterns increase friction. The first and second patterns prevent the fixture from slipping.

[0013] Furthermore, in the aforementioned welding fixture for the positioning ribs of the machine base, support plates are connected to both sides of the mounting groove. The support plates are used to support and fix the positioning ribs. The support plates are provided with slots, and the positioning ribs are engaged in the slots. The outer periphery of the support plates is welded to the spacer ring, and the slots on the support plates are welded to the positioning ribs.

[0014] Furthermore, in the aforementioned machine base positioning rib welding fixture, in order to ensure the structural strength of the fixture, the base plate, the first clamping plate, and the second clamping plate are welded together.

[0015] As can be seen from the above technical solution, this utility model has the following beneficial effects: The welding fixture for the positioning ribs of this utility model adjusts the radial dimension of the positioning ribs by turning the first adjusting bolt to ensure the concentricity of the positioning ribs, and corrects the chord spacing of adjacent positioning ribs by turning the second and third adjusting bolts, thereby realizing the chordal and radial adjustment of the positioning ribs, improving the flexibility of adjustment, improving the adjustment efficiency, improving the production efficiency, and ensuring the quality of the generator stator. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation of the welding fixture for the positioning ribs of the machine base of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the fixture;

[0018] Figure 3 This is a schematic diagram of the structure of the first clamping plate;

[0019] Figure 4 This is a schematic diagram of the structure of the second clamping plate;

[0020] Figure 5 This is a schematic diagram of the structure of the base plate;

[0021] Figure 6 This is a schematic diagram of the structure of the first clamping plate;

[0022] Figure 7 This is a schematic diagram of the structure of the spacer ring;

[0023] Figure 8 for Figure 7 A magnified view of a portion of the image.

[0024] In the diagram: 100, jig; 200, spacer ring; 201, mounting groove; 202, support plate; 1, base plate; 11, first adjusting bolt; 12, through groove; 2, first clamping plate; 20, first groove; 21, first clamping arm; 211, first pattern; 22, second clamping arm; 221, first clamping bolt; 23, second adjusting bolt; 3, second clamping plate; 30, second groove; 31, third clamping arm; 32, fourth clamping arm; 321, second clamping bolt; 33, third adjusting bolt. Detailed Implementation

[0025] Example

[0026] like Figure 1-2The fixture shown includes a welding jig for a positioning rib, comprising a jig 100 and a spacer ring 200. The spacer ring 200 has mounting grooves 201 spaced circumferentially, each groove being larger than the corresponding size of the positioning rib. The mounting grooves 201 are used to accommodate the positioning rib. The jig 100 includes a base plate 1, which is square. A first clamping plate 2 and a second clamping plate 3 are respectively connected to both ends of the base plate 1, forming a U-shape. The first clamping plate 2 and the second clamping plate 3 are respectively provided with a first groove 20 and a second groove 30. The spacer ring 200 extends into the first groove 20 and the second groove 30, and the first clamping plate 2 and the second clamping plate 3 clamp the spacer ring 200. The base plate 1 is located inside the spacer ring 200, and a first adjusting bolt 11 is threadedly connected to the base plate 1. The first adjusting bolt 11 is radially arranged along the spacer ring 200, with its end abutting against the side of the positioning rib. The first adjusting bolt 11 is used to correct the installation error of the positioning rib along the radial direction of the spacer ring 200.

[0027] like Figure 3 The welding fixture for the positioning ribs of the machine base shown has a first clamping plate 2 including a first clamping arm 21 and a second clamping arm 22. The first clamping arm 21 is abutted against the spacer ring 200, and the second clamping arm 22 is threadedly connected to a first clamping bolt 221. The first clamping bolt 221 cooperates with the first clamping arm 21 to clamp the spacer ring 200.

[0028] like Figure 4 The welding fixture for the positioning ribs of the machine base shown has a second clamping plate 3 and a first clamping plate 2 respectively. The second clamping plate 3 includes a third clamping arm 31 and a fourth clamping arm 32. The third clamping arm 31 is disposed against the spacer ring 200, and the fourth clamping arm 32 is threadedly connected to a second clamping bolt 321. The second clamping bolt 321 cooperates with the third clamping arm 31 to clamp the spacer ring 200.

[0029] In this embodiment, the first clamping arm 21 is threadedly connected to a second adjusting bolt 23, the axis of which is perpendicular to the axis of the first adjusting bolt 11, and the second adjusting bolt 23 abuts against the upper side of the positioning rib. The third clamping arm 31 is threadedly connected to a third adjusting bolt 33, which abuts against the lower side of the positioning rib. The second adjusting bolt 23 and the third adjusting bolt 33 are arranged facing each other, and they cooperate to adjust the spacing between adjacent positioning ribs.

[0030] In this embodiment, the first adjusting bolt 11, the second adjusting bolt 23, and the third adjusting bolt 33 are all fine-pitch bolts. Using fine-pitch bolts improves adjustment accuracy. The first adjusting bolt 11, the second adjusting bolt 23, and the third adjusting bolt 33 are preferably M16x1.

[0031] like Figure 5The welding fixture for the positioning ribs shown has two or more first adjusting bolts 11 arranged along the centerline of the first clamping plate 2 and the second clamping plate 3. Having two or more first adjusting bolts 11 enhances the stability of the radial correction of the positioning ribs.

[0032] In this embodiment, the base plate 1 is provided with a through groove 12, which is symmetrically arranged on both sides of the first adjusting bolt 11. The through groove 12 can reduce the weight of the fixture 100, improve lightweighting, and also provide space for welding operations, avoiding interference between the welding torch and the fixture 100.

[0033] like Figure 6 The welding fixture for the positioning ribs of the machine base shown has a first pattern 211 on the side of the first clamping arm 21 near the second clamping arm 22, and a second pattern on the side of the third clamping arm 31 near the fourth clamping arm 32. The first pattern 211 and the second pattern are respectively set as vertical stripes, but can also be set as a grid pattern, diamond pattern, etc. The first pattern 211 and the second pattern increase friction. The first pattern 211 and the second pattern can prevent the fixture 100 from slipping. If the first pattern 211 is set as vertical stripes, the first pattern 211 is arranged in an array from the direction away from the base plate 1 towards the base plate 1.

[0034] like Figure 7-8 The welding fixture for the positioning ribs shown has mounting slots 201 with support plates 202 connected to both sides. The support plates 202 are used to support and fix the positioning ribs. The support plates 202 are provided with slots, and the positioning ribs are engaged in the slots. The outer periphery of the support plates 202 is welded to the spacer ring 200, and the slots on the support plates 202 are welded to the positioning ribs.

[0035] In this embodiment, to ensure the structural strength of the fixture 100, the base plate 1, the first clamping plate 2, and the second clamping plate 3 are welded together.

[0036] This utility model is used to adjust the positional accuracy of the positioning ribs. Before installation, the spacer ring 200 is cut to the required position using a laser cutting machine, forming its shape and mounting groove 20. During the installation of the positioning ribs, the spacer rings 200 are arranged on the welding platform according to the design dimensions and fixed by spot welding. The positioning ribs are inserted into the mounting groove 201, and the spacer rings 200 are inserted into the first groove 20 and the second groove 30, which are located above and below the mounting groove 201. The first clamping bolt 221 is tightened, applying a pushing force to the spacer ring 200, and the first clamping arm 21 applies a reverse pushing force to the spacer ring 200. The first clamping plate 2 clamps the spacer ring 200. The second clamping bolt 321 is tightened, applying a pushing force to the spacer ring 200, and the second clamping plate 3 clamps the spacer ring 200. Multiple fixtures 100 are installed along the positioning ribs using the same method. Before adjustment, use a 3D laser scanner to measure the radial dimensions and chord spacing of the positioning ribs. Based on the test results, tighten the first adjusting bolt 11 to compress the positioning ribs radially along the spacer ring 200, so that the positioning ribs are equidistant from the center of the spacer ring 200. After adjustment, use a 3D laser scanner to mark the points and remeasure to ensure that the radial dimensions of the positioning ribs are qualified.

[0037] Adjusting the chord spacing of the positioning rib by turning the second adjusting bolt 23 and the third adjusting bolt 33 is done in the following steps: First, offset the positioning rib counterclockwise; then, turn the third adjusting bolt 33 counterclockwise, followed by the second adjusting bolt 23 clockwise. After adjustment, turn the third adjusting bolt 33 clockwise to fix the positioning rib. Next, offset the positioning rib clockwise; first, turn the second adjusting bolt 23 counterclockwise, followed by the third adjusting bolt 33 clockwise. After adjustment, turn the second adjusting bolt 23 clockwise to fix the positioning rib, thus achieving chord spacing adjustment. Then, install the support plates 202 on both sides of the spacer ring 200. The positioning rib is inserted into the slots provided in the support plates 202. The outer circumference of the support plates 202 and the spacer ring 200 are spot-welded together. The slots on the support plates 202 are spot-welded to the positioning rib. Remove the fixture and fully weld the aforementioned spot-welded areas. All bolts are standard right-hand bolts. Clockwise and counterclockwise rotation are based on the direction from the bolt head to the bolt end, rotating around the circumference of the bolt.

[0038] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A welding fixture for machine base positioning ribs, characterized in that: The fixture includes a jig (100) and a spacer ring (200). The spacer ring (200) has mounting grooves (201) spaced circumferentially. The mounting grooves (201) are larger than the corresponding dimensions of the positioning ribs and are used to accommodate the positioning ribs. The jig (100) includes a base plate (1), which is square. A first clamping plate (2) and a second clamping plate (3) are connected to both ends of the base plate (1). The base plate (1), the first clamping plate (2), and the second clamping plate (3) are connected to form a U-shape. The first clamping plate (2) and the second clamping plate (3) are connected to form a U-shape. The plate (3) is provided with a first groove (20) and a second groove (30) respectively. The spacer (200) extends into the first groove (20) and the second groove (30). The first clamping plate (2) and the second clamping plate (3) clamp the spacer (200) respectively. The base plate (1) is located inside the spacer (200). The base plate (1) is threaded with a first adjusting bolt (11). The first adjusting bolt (11) is arranged radially along the spacer (200). The first adjusting bolt (11) is used to correct the installation error of the positioning rib along the radial direction of the spacer (200).

2. The welding fixture for the machine base positioning ribs according to claim 1, characterized in that: The first clamping plate (2) includes a first clamping arm (21) and a second clamping arm (22). The first clamping arm (21) is abutted against the spacer ring (200). The second clamping arm (22) is threadedly connected to a first clamping bolt (221). The first clamping bolt (221) cooperates with the first clamping arm (21) to clamp the spacer ring (200).

3. The welding fixture for the machine base positioning ribs according to claim 2, characterized in that: The second clamping plate (3) and the first clamping plate (2) are respectively arranged; the second clamping plate (3) includes a third clamping arm (31) and a fourth clamping arm (32). The third clamping arm (31) is arranged to abut against the spacer ring (200). The fourth clamping arm (32) is threadedly connected to a second clamping bolt (321). The second clamping bolt (321) cooperates with the third clamping arm (31) to clamp the spacer ring (200).

4. The welding fixture for the machine base positioning ribs according to claim 3, characterized in that: The first clamping arm (21) is threadedly connected to a second adjusting bolt (23), the axis of the second adjusting bolt (23) is set perpendicular to the axis of the first adjusting bolt (11), and the second adjusting bolt (23) abuts against the upper side of the positioning rib; the third clamping arm (31) is threadedly connected to a third adjusting bolt (33), and the third adjusting bolt (33) abuts against the lower side of the positioning rib; the second adjusting bolt (23) and the third adjusting bolt (33) are set facing each other, and the second adjusting bolt (23) and the third adjusting bolt (33) cooperate to adjust the spacing between adjacent positioning ribs.

5. The welding fixture for the machine base positioning ribs according to claim 4, characterized in that: The first adjusting bolt (11), the second adjusting bolt (23) and the third adjusting bolt (33) are respectively set as fine thread bolts.

6. The welding fixture for the machine base positioning ribs according to claim 1, characterized in that: The first adjusting bolt (11) is arranged along the center line of the first clamping plate (2) and the second clamping plate (3), and there are two or more first adjusting bolts (11).

7. The welding fixture for the machine base positioning ribs according to claim 1, characterized in that: The base plate (1) is provided with a through groove (12), which is symmetrically arranged on both sides of the first adjusting bolt (11).

8. The welding fixture for the machine base positioning ribs according to claim 3, characterized in that: The first clamping arm (21) has a first pattern (211) on the side near the second clamping arm (22), and the third clamping arm (31) has a second pattern on the side near the fourth clamping arm (32); the first pattern (211) and the second pattern are respectively set as vertical stripes; the first pattern (211) and the second pattern increase the friction.

9. The welding fixture for the machine base positioning ribs according to claim 8, characterized in that: The mounting groove (201) is connected to two sides of a support plate (202), which is used to support and fix the positioning rib.

10. The welding fixture for the machine base positioning ribs according to claim 1, characterized in that: The base plate (1), the first clamping plate (2), and the second clamping plate (3) are welded together.

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