Lathe clamp for processing reinforcing ring of gas turbine

Abstract

The utility model relates to a lathe fixture for processing a reinforcing ring of a gas turbine, which comprises a bottom plate and a positioning plate and is characterized in that a turntable is fixed on the upper surface of the bottom plate, a lifting cylinder is fixed in the center of the upper surface of the turntable, an expanding plate is fixed at the top end of a cylinder rod of the lifting cylinder, the positioning plate is fixed above the expanding plate, and a positioning ring is fixed on the upper surface of the positioning plate. The outer portion of the positioning ring is sleeved with a pressing ring concentric with the positioning ring, an annular clamping space corresponding to the reinforcing ring is formed between the positioning ring and the pressing ring, an upper positioning hole set and a lower positioning hole set are formed in the inner wall of the positioning ring, an upper positioning piece is connected into each upper positioning hole of the upper positioning hole set, and a lower positioning piece is connected into each lower positioning hole of the lower positioning hole set. The tail ends of the upper positioning piece and the lower positioning piece penetrate through the corresponding upper positioning hole and the lower positioning hole to point to the pressing ring. According to the utility model, the processing efficiency is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, specifically to a lathe fixture for machining gas turbine reinforcing rings. Background Technology

[0002] The reinforcing ring of the gas turbine is a thin-walled and irregularly shaped part. When machining its two ends, special fixtures are required to clamp it to avoid deformation of the part.

[0003] For example, CN 220806383 U discloses a lathe fixture for machining a gas turbine reinforcing ring, which includes a base, a mandrel, a positioning rod, a positioning ring, a pressure cap, a pressure ring, and a pressure plate. During machining, the fixture is fixed on the lathe. First, the reinforcing ring is clamped onto the positioning ring, the pressure ring is fitted, and it is secured with the pressure cap and locking bolts. The large end of the part is then machined. After machining the large end, the pressure cap is loosened, the part is clamped onto the positioning ring, the pressure ring is fitted, and the pressure plate is fixed to the base with bolts, nuts, and studs to tighten the pressure ring. The upper end face of the small end of the reinforcing ring is then machined. This lathe fixture avoids deformation of the part and ensures that the product quality meets the design drawing requirements. However, the following problem still exists: machining both ends of the reinforcing ring requires two clamping operations, which restricts machining efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a lathe fixture for machining gas turbine reinforcing rings that has a reasonable structure and reliable use, thereby significantly improving machining efficiency and solving the above-mentioned problems.

[0005] The technical solution of this utility model is:

[0006] A lathe fixture for machining a gas turbine reinforcing ring includes a base plate and a positioning plate. The key technical features are: a turntable is fixed to the upper surface of the base plate; a lifting cylinder is fixed to the center of the upper surface of the turntable; an expanding plate is fixed to the top of the cylinder rod of the lifting cylinder; the positioning plate is fixed above the expanding plate; a positioning ring is fixed to the upper surface of the positioning plate; a pressure ring concentric with the positioning ring is fitted around the outside of the positioning ring; an annular clamping space corresponding to the reinforcing ring is formed between the positioning ring and the pressure ring; an upper positioning hole group and a lower positioning hole group are provided on the inner wall of the positioning ring; an upper positioning component is connected to each upper positioning hole in the upper positioning hole group; a lower positioning component is connected to each lower positioning hole in the lower positioning hole group; and the ends of the upper and lower positioning components pass through the corresponding upper and lower positioning holes and point towards the pressure ring.

[0007] In the aforementioned lathe fixture for machining gas turbine reinforcing rings, the outer circumferential surface of the positioning ring matches the shape of the inner circumferential surface of the reinforcing ring, and the inner circumferential surface of the pressure ring matches the shape of the outer circumferential surface of the reinforcing ring.

[0008] The aforementioned lathe fixture for machining gas turbine reinforcing rings comprises four upper positioning holes evenly distributed on the upper part of the inner wall of the positioning ring. The upper positioning component comprises an upper screw screwed into the upper positioning hole, an upper locking nut and an upper fixing nut located at the starting end of the upper screw, and an upper tightening pad located at the end of the upper screw. The end of the upper positioning hole is provided with an enlarged diameter hole corresponding to the upper tightening pad.

[0009] The aforementioned lathe fixture for machining gas turbine reinforcing rings comprises four lower positioning holes evenly distributed on the lower part of the inner wall of the positioning ring. The lower positioning component comprises a lower screw screwed into the lower positioning hole, a lower locking nut and a lower fixing nut located at the starting end of the lower screw screw, and a lower tightening pad located at the end of the lower screw screw. The lower positioning hole has an enlarged diameter hole corresponding to the lower tightening pad at its end.

[0010] In the aforementioned lathe fixture for machining the gas turbine reinforcing ring, each of the upper positioning holes in the upper positioning hole group is a horizontal hole with its center line perpendicular to the upper side wall of the reinforcing ring, and each of the lower positioning holes in the lower positioning hole group is an oblique hole with its center line perpendicular to the lower side wall of the reinforcing ring.

[0011] The beneficial effects of this utility model are:

[0012] 1. In use, the reinforcing ring to be machined is fitted onto the outer circumference of the positioning ring, and then a pressure ring is fitted onto the outer circumference of the reinforcing ring. The positioning ring and the pressure ring clamp the reinforcing ring. Then, the upper and lower positioning parts press down on the reinforcing ring to achieve horizontal and vertical positioning of the reinforcing ring, preventing displacement in the vertical, horizontal, or even circumferential directions during machining. The upper and lower ends of the reinforcing ring are exposed outside the clamping space of the positioning ring and the pressure ring, respectively, facilitating machining. This utility model does not require secondary clamping, significantly improving machining efficiency.

[0013] 2. During the machining process, the turntable drives the lifting cylinder, positioning plate, positioning ring, pressure ring and clamping reinforcing ring to rotate. During the rotation of the reinforcing ring, it cooperates with the cutting tool to achieve uniform turning of the upper or lower end.

[0014] 3. Before machining, adjust the height using the lifting cylinder to facilitate switching between machining the upper or lower end of the reinforcing ring. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 yes Figure 1 Enlarged view of section A.

[0017] In the diagram: 1. Pressure ring, 2. Reinforcing ring, 3. Upper positioning hole, 4. Positioning ring, 5. Positioning plate, 6. Lower positioning hole, 7. Expanding plate, 8. Lifting cylinder, 9. Turntable, 10. Base plate, 11. Upper tightening pad, 12. Upper screw, 13. Upper locking nut, 14. Upper fixing nut, 15. Lower fixing nut, 16. Lower screw, 17. Lower locking nut, 18. Lower tightening pad. Detailed Implementation

[0018] The present invention will be described in detail with reference to the accompanying drawings.

[0019] like Figure 1 , Figure 2 As shown, the lathe fixture for machining the gas turbine reinforcing ring includes a base plate 10 and a positioning plate 5. A turntable 9 is fixed on the upper surface of the base plate 10, and a lifting cylinder 8 is fixed at the center of the upper surface of the turntable 9. An expansion plate 7 is fixed at the top of the cylinder rod of the lifting cylinder 8. The positioning plate 5 is fixed above the expansion plate 7. A positioning ring 4 is fixed on the upper surface of the positioning plate 5. A pressure ring 1 concentric with the positioning ring 4 is sleeved on the outside of the positioning ring 4. An annular clamping space corresponding to the reinforcing ring 2 is formed between the positioning ring 4 and the pressure ring 1.

[0020] The inner wall of the positioning ring 4 is provided with an upper positioning hole group and a lower positioning hole group. Each upper positioning hole 3 of the upper positioning hole group is connected to an upper positioning component, and each lower positioning hole 6 of the lower positioning hole group is connected to a lower positioning component. The ends of the upper positioning component and the lower positioning component pass through the corresponding upper positioning hole 3 and lower positioning hole 6 and point towards the pressure ring 1.

[0021] In this embodiment, the outer circumferential surface of the positioning ring 4 matches the inner circumferential surface of the reinforcing ring 2, and the inner circumferential surface of the pressure ring 1 matches the outer circumferential surface of the reinforcing ring 2. The upper positioning hole group consists of four upper positioning holes 3 evenly distributed on the upper part of the inner wall of the positioning ring 4. The upper positioning component consists of an upper screw 12 screwed into the upper positioning hole 3, an upper locking nut 13 and an upper fixing nut 14 located at the starting end of the upper screw 12, and an upper tightening pad 11 located at the end of the upper screw 12. The end of the upper positioning hole 3 is provided with an enlarged diameter hole corresponding to the upper tightening pad 11. The lower positioning hole group consists of four lower positioning holes 6 evenly distributed on the lower part of the inner wall of the positioning ring 4. The lower positioning component consists of a lower screw 16 screwed into the lower positioning hole 6, a lower locking nut 17 and a lower fixing nut 15 located at the starting end of the lower screw 16, and a lower tightening pad 18 located at the end of the lower screw 16. The end of the lower positioning hole 6 is provided with an enlarged diameter hole corresponding to the lower tightening pad 18. Each of the upper positioning holes 3 in the upper positioning hole group is a horizontal hole, and its center line is perpendicular to the upper side wall of the reinforcing ring 2. Each of the lower positioning holes 6 in the lower positioning hole group is an oblique hole, and its center line is perpendicular to the lower side wall of the reinforcing ring 2.

[0022] Working principle:

[0023] 1. In use, the reinforcing ring 2 to be machined is fitted onto the outer circumference of the positioning ring 4, and then the pressure ring 1 is fitted onto the outer circumference of the reinforcing ring 2. The positioning ring 4 and the pressure ring 1 clamp the reinforcing ring 2. Then, the upper screw 12 and the lower screw 16 are rotated to make the upper clamping pad 11 and the lower clamping pad 18 clamp the reinforcing ring 2 respectively, preventing it from moving during processing. The upper clamping pad 11 and the lower clamping pad 18 are made of flexible material to avoid damaging the reinforcing ring 2. After clamping, the upper and lower ends of the reinforcing ring 2 are exposed outside the clamping space of the positioning ring 4 and the pressure ring 1.

[0024] 2. Start the lifting cylinder 8 to drive the reinforcing ring 2 to the height of the upper end of the machine. Then start the turntable 9 to drive the lifting cylinder 8, positioning plate 5, positioning ring 4, pressure ring 1 and the clamped reinforcing ring 2 to rotate. During the rotation of the reinforcing ring 2, it cooperates with the cutting tool to achieve uniform turning of the upper end.

[0025] 3. After the upper end is machined, the machining height is adjusted by using the lifting cylinder 8, which drives the reinforcing ring 2 to the height of the lower end. The turntable 9 is started again, which drives the lifting cylinder 8, positioning plate 5, positioning ring 4, pressure ring 1 and the clamped reinforcing ring 2 to rotate. During the rotation of the reinforcing ring 2, it cooperates with the cutting tool to achieve uniform machining of the lower end.

[0026] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A lathe fixture for machining a gas turbine reinforcing ring, comprising a base plate and a positioning plate, characterized in that: A turntable is fixed to the upper surface of the base plate, and a lifting cylinder is fixed to the center of the upper surface of the turntable. An expansion plate is fixed to the top of the cylinder rod of the lifting cylinder. A positioning plate is fixed above the expansion plate. A positioning ring is fixed to the upper surface of the positioning plate. A pressure ring concentric with the positioning ring is fitted around the outside of the positioning ring. An annular clamping space with a corresponding reinforcing ring is formed between the positioning ring and the pressure ring. An upper positioning hole group and a lower positioning hole group are provided on the inner wall of the positioning ring. An upper positioning component is connected to each upper positioning hole of the upper positioning hole group, and a lower positioning component is connected to each lower positioning hole of the lower positioning hole group. The ends of the upper and lower positioning components pass through the corresponding upper and lower positioning holes and point towards the pressure ring. The upper positioning hole group consists of four upper positioning holes evenly distributed on the upper part of the inner wall of the positioning ring. The upper positioning component consists of an upper screw screwed into the upper positioning hole, an upper locking nut and an upper fixing nut provided at the starting end of the upper screw, and an upper tightening pad provided at the end of the upper screw. The upper positioning hole is provided with an enlarged diameter hole corresponding to the upper tightening pad at the end. The lower positioning hole group consists of four lower positioning holes evenly distributed on the lower part of the inner wall of the positioning ring. The lower positioning component consists of a lower screw screwed into the lower positioning hole, a lower locking nut and a lower fixing nut provided at the starting end of the lower screw screw, and a lower tightening pad provided at the end of the lower screw screw. The lower positioning hole is provided with an enlarged diameter hole corresponding to the lower tightening pad at the end. Each upper positioning hole in the upper positioning hole group is a horizontal hole, and its center line is perpendicular to the upper side wall of the reinforcing ring. Each lower positioning hole in the lower positioning hole group is an oblique hole, and its center line is perpendicular to the lower side wall of the reinforcing ring.

2. The lathe fixture for machining gas turbine reinforcing rings according to claim 1, characterized in that: The outer circumferential surface of the positioning ring matches the shape of the inner circumferential surface of the reinforcing ring, and the inner circumferential surface of the pressure ring matches the shape of the outer circumferential surface of the reinforcing ring.

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