A kind of tooth pressure plate welding fixture

Abstract

The present invention belongs to the technical field of hydro-generators, and particularly relates to a tooth pressing plate welding fixture. The invention includes an upper tooth welding fixture and a lower tooth welding fixture. By modularizing the design of the welding fixture, it can be assembled according to different workpieces during use. One set of molds can weld the upper and lower tooth pressing plates simultaneously. When welding the lower tooth pressing plates, two pieces can be welded at the same time. The backing plate and the upper tooth pressing plate adopt the same reference, ensuring the welding position accuracy of the lower tooth pressing plate, achieving multiple uses of one mold, and having the advantages of simplifying operations, improving work efficiency, and saving costs.

Description

Technical Field

[0001] The invention belongs to the technical field of hydro-generators, and in particular relates to a gear pressure plate welding fixture. Background Art

[0002] The stator core of a vertical hydro-turbine generator is mainly composed of stator sectors, upper tooth pressure plates, lower tooth pressure plates, tensioning screws and other parts. The upper and lower tooth pressure plates use the tension transmitted by the tensioning screws to press the stator sectors. During the operation of the unit, vibrations will occur. If the stator core is not tight enough, the stator core will gradually loosen over time, causing the core temperature to rise too high. In severe cases, it will cause mechanical damage to the stator sectors and even the stator coils. A stator core often requires more than a dozen or even dozens of upper and lower tooth pressure plates, so the accuracy of welding at each pressure finger position on the tooth pressure plate is particularly important.

[0003] Therefore need a kind of tooth pressure plate welding fixture that can solve the above-mentioned problem. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a tooth pressure plate welding fixture. The present invention adopts a modular design of the welding fixture, which can be assembled according to different workpieces when used. A set of molds can weld the upper and lower tooth pressure plates at the same time. The welding of the lower tooth pressure plate can be carried out at the same time. The pad and the upper tooth pressure plate use the same reference to ensure the welding position accuracy of the lower tooth pressure plate, realizing the advantages of one mold for multiple uses and cost saving.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a tooth pressure plate welding fixture, including an upper tooth welding fixture and a lower tooth welding fixture, the upper tooth welding fixture is composed of an upper tire, a middle tire, a bottom tire, a fastening bolt, a fastening nut, and a wedge block, the bottom tire is an arc-shaped structure that is compatible with the arrangement shape of the pressure fingers, the middle tire is an arc-shaped structure that conforms to the arrangement shape of the pressure fingers, the upper tire is a rectangular plate, the upper tire, the middle tire, and the bottom tire are welded and fixedly connected, keeping one end flush, the lower tooth welding fixture is composed of an upper tire, a middle tire, a bottom tire, and a pad, the bottom tire is an arc-shaped structure that conforms to the arrangement shape of the pressure fingers, the middle tire is an arc-shaped structure that conforms to the arrangement shape of the pressure fingers, the upper tire is a rectangular plate, the upper tire, the middle tire, and the bottom tire are welded and fixedly connected, keeping one end flush, the pad is on the surface of the upper tire, and the two are movably connected.

[0006] Furthermore, the upper tire is provided with pin hole three, the middle tire is provided with pin hole two and pin hole one, and the pad is provided with a pad pin hole.

[0007] Furthermore, the surface of the middle tire has a fastening bolt for adjusting the fastening pressure finger, and the two are fixedly connected, the fastening bolt and the fastening nut are bolted, and the surface of the middle tire has a wedge block for limiting the circumferential movement of the pressure finger, and the two are movably connected.

[0008] The advantages of the present invention are as follows: The present invention provides a tooth pressing plate welding fixture, which includes an upper tooth welding fixture and a lower tooth welding fixture. The upper tooth welding fixture is composed of an upper upper tire, a middle tire, a bottom tire, fastening bolts, fastening nuts, and wedges. The lower tooth welding fixture is composed of an upper tire, a middle tire, a bottom tire, fastening bolts, fastening nuts, wedges, and backing plates. For the upper tooth pressing plates and lower tooth pressing plates in the stator core with different integral circle numbers and different outer dimensions, different welding fixtures are required during welding. The present invention modularizes the welding fixture design, and during use, it is assembled according to different workpieces. One set of molds can weld the upper and lower tooth pressing plates simultaneously. When welding the lower tooth pressing plates, two can be welded simultaneously. The backing plate and the upper tooth pressing plate adopt the same reference, ensuring the welding position accuracy of the lower tooth pressing plate, achieving the advantages of multi-purpose of one mold and cost savings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0010] Figure 1 Schematic diagram of the welding product of the upper tooth welding fixture of the present invention;

[0011] Figure 2 Schematic diagram of the structure of the upper tooth welding fixture of the present invention;

[0012] Figure 3 Schematic diagram of the welding product of the lower tooth welding fixture of the present invention;

[0013] Figure 4 Schematic diagram of the structure of the lower tooth welding fixture of the present invention;

[0014] Wherein:

[0015] 1. Bottom tire; 2. First positioning pin; 3. Wedge;

[0016] 4. Second positioning pin; 5. Third positioning pin; 6. Fastening bolt;

[0017] 7. Fastening nut; 8. Backing plate; 9. Fourth positioning pin;

[0018] 10. Pressing finger; 11. Upper tooth pressing plate; 12. Tooth pressing plate pin hole;

[0019] 13. Chamfer; 14. Pressing finger arc plate; 15. Lower tooth pressing plate;

[0020] 16. Upper tooth welding fixture; 17. Lower tooth welding fixture; 18. Upper tire;

[0021] 19. Middle tire; 20. Pin hole three; 21. Pin hole one;

[0022] 22. Pin hole two; 23. Pad pin hole. Detailed implementation mode

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1:

[0026] Figure 1 It is a schematic diagram of the welded product of the upper tooth welding tire of the present invention. Figure 2 It is a schematic diagram of the structure of the upper tooth welding tire of the present invention. Figure 3 It is a schematic diagram of the welded product of the lower tooth welding tire of the present invention. Figure 4 It is a schematic diagram of the structure of the lower tooth welding tire of the present invention. As Figure 2 shown, the upper tooth welding tire 16 is composed of an upper tire 18, a middle tire 19, a bottom tire 1, fastening bolts 6, fastening nuts 7, and wedges 3. The bottom tire 1 is an arc-shaped structure, conforming to the arrangement shape of the pressing fingers 10. The middle tire 19 is an arc-shaped structure, conforming to the arrangement shape of the pressing fingers 10. The upper tire 18 is a rectangular plate. The upper tire 18 is provided with a pin hole three 20. The middle tire 19 is provided with a pin hole one 21 and a pin hole two 22. The upper tire 18, the middle tire 19, and the bottom tire 1 are welded and fixed together by welding, and the three are kept flush at one end of the arc-shaped inner circle. As Figure 4As shown in the figure, the upper tooth welding fixture 16 is composed of an upper fixture 18, a middle fixture 19, a bottom fixture 1, fastening bolts 6, fastening nuts 7, wedge blocks 3, and a backing plate 8. The bottom fixture 1 is of an arc structure, conforming to the arrangement shape of the pressing fingers 10. The middle fixture 19 is of an arc structure, conforming to the arrangement shape of the pressing fingers 10. The upper fixture 18 is a rectangular plate. The upper fixture 18 is provided with a third pin hole 20. The middle fixture 19 is provided with a first pin hole 21 and a second pin hole 22. The upper fixture 18, the middle fixture 19, and the bottom fixture 1 are welded and fixed together by welding. The three are kept flush at one end of the arc inner circle. The backing plate 8 is provided with a backing plate pin hole 23.

[0027] Working mode: The present invention provides a tooth pressing plate welding fixture. When in use, the present invention is divided into two parts, namely an upper tooth welding fixture 16 and a lower tooth welding fixture 17. After the upper tooth welding fixture 16 is welded, it can be used to weld the upper tooth pressing plate 11, the pressing fingers 10, and the pressing finger arc plate 14. After the lower tooth welding fixture 17 is welded, it can be used to weld the lower tooth pressing plate 15, the pressing fingers 10, and the pressing finger arc plate 14. When welding the upper tooth pressing plate 11, first place the upper tooth pressing plate 11 on the upper fixture 18, insert the third positioning pin 5 into the tooth pressing plate pin hole 12 on the upper tooth pressing plate 11 and the third pin hole 20 on the upper fixture 18 to temporarily fix the upper tooth pressing plate 11 and the upper fixture 18 together. Place the pressing fingers 10 on the planes of the upper tooth pressing plate 11 and the middle fixture 19 first, use the wedge block 3 to fix the circumferential direction of the pressing fingers, insert the first positioning pin 2 and the second positioning pin 4 into the middle fixture 19 to fix the spacing of the pressing fingers 10, and use the arc surface of the bottom fixture 1 to limit the radial direction of each pressing finger 10. The pressing fingers 10 at both ends are adjusted and fixed with the fastening bolts 6 and the fastening nuts 7. Then place the pressing finger arc plate 14 on the top of the pressing fingers 10. When all these preparations are done, start welding. When welding the lower tooth pressing plate 15, first temporarily fix the backing plate 8 to the upper fixture 18 with the third positioning pin 5. Since the lower tooth pressing plate 15 is smaller, the lower tooth welding fixture 17 can realize the simultaneous welding operation of two lower tooth pressing plates 15. The placement of the lower tooth pressing plate 15, the pressing fingers 10, and the pressing finger arc plate 14 is the same as the preparatory work before welding the upper tooth pressing plate 11, and the specific placement and fixing methods are the same. By modularizing the design of the welding fixture, the present invention is assembled according to different workpieces during use. A set of molds can weld the upper and lower tooth pressing plates at the same time. When welding the lower tooth pressing plate, two can be welded simultaneously. The backing plate and the upper tooth pressing plate adopt the same reference, ensuring the welding position accuracy of the lower tooth pressing plate, achieving the advantages of multiple uses of one mold and cost savings.

[0028] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tooth pressing plate welding fixture, comprising an upper tooth welding fixture (16) and a lower tooth welding fixture (17). It is characterized in that: The upper tooth welding fixture (16) is composed of an upper tire (18), a middle tire (19), a bottom tire (1), fastening bolts (6), fastening nuts (7), and wedge blocks (3). The bottom tire (1) is an arc-shaped structure that conforms to the arrangement shape of the pressing fingers (10). The middle tire (19) is an arc-shaped structure that is adapted to the arrangement shape of the pressing fingers (10). The upper tire (18) is a rectangular plate. The upper tire (18), the middle tire (19), and the bottom tire (1) are welded and fixedly connected to keep one end flush. The lower tooth welding fixture (17) is composed of an upper tire (18), a middle tire (19), a bottom tire (1), fastening bolts (6), fastening nuts (7), wedge blocks (3), and a backing plate (8). The bottom tire (1) is an arc-shaped structure that is adapted to the arrangement shape of the pressing fingers (10). The middle tire (19) is an arc-shaped structure that conforms to the arrangement shape of the pressing fingers (10). The upper tire (18) is a rectangular plate. The upper tire (18), the middle tire (19), and the bottom tire (1) are welded and fixedly connected to keep one end flush. The backing plate (8) is on the surface of the upper tire (18), and the two are movably connected; The upper tire (18) is provided with a third pin hole (20), the middle tire (19) is provided with a second pin hole (22) and a first pin hole (21), and the backing plate (8) is provided with a backing plate pin hole (23); The surface of the middle tire (19) has a fastening bolt (6) for adjusting and fastening the pressing fingers (10), and the two are fixedly connected. The fastening bolt (6) and the fastening nut (7) are bolt-connected. The surface of the middle tire (19) has a wedge block (3) for restricting the circumferential movement of the pressing fingers (10), and the two are movably connected.

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