A positioning fixture for nozzle ring grinding

Abstract

This utility model relates to the technical field of nozzle ring processing equipment, and in particular to a positioning fixture for nozzle ring grinding, comprising a support plate, a limiting plate, a clamping assembly, and a base; the support plate is fixed on the base, and a groove is formed on its upper end along the length direction; the limiting plate is fixedly covered on the groove, and the limiting plate is an L-shaped plate structure composed of a right side plate and a left side plate; the right side plate and the left side plate are symmetrically arranged along the opening direction of the groove; the clamping assembly is fixed on the base, and the actuating end of the clamping assembly is slidably disposed in the groove, while at least part of the actuating end of the clamping assembly protrudes from the upper surface of the support plate; the actuating end of the clamping assembly faces the inner angle of the limiting plate. This utility model can adapt to mounting plates or back covers of different outer diameters and thicknesses without obstructing the end face to be ground, significantly improving grinding efficiency and end face quality.

Description

Technical Field

[0001] This utility model relates to the technical field of nozzle ring processing equipment, specifically to a positioning fixture for nozzle ring grinding. Background Technology

[0002] In the field of turbomachinery manufacturing, the mounting plate or rear cover of the nozzle ring requires drilling, which easily produces burrs on its upper and lower main end faces. To ensure assembly accuracy and working performance, the main end faces need to be ground. The traditional method uses a three-jaw chuck to hold the workpiece, but it has significant drawbacks: interference problems, the jaws protrude from the workpiece end face, obstructing the grinding path, requiring repeated disassembly and adjustment, resulting in low efficiency; poor adaptability, the fixed jaws are difficult to adapt to workpieces with different outer diameters or thicknesses. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a positioning fixture for nozzle ring grinding. It can adapt to mounting plates or back covers of different outer diameters and thicknesses without obstructing the end face to be ground, thus significantly improving grinding efficiency and end face quality.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a positioning fixture for nozzle ring grinding, comprising a support plate, a limiting plate, a clamping assembly, and a base; the support plate is fixed on the base, and a groove is formed on its upper end along its length; the limiting plate is fixedly covered on the groove, and the limiting plate is an L-shaped plate structure composed of a right side plate and a left side plate; the right side plate and the left side plate are symmetrically arranged along the groove opening direction; the clamping assembly is fixed on the base, and the actuating end of the clamping assembly is slidably disposed in the groove, while the actuating end of the clamping assembly at least partially protrudes from the upper surface of the support plate; the actuating end of the clamping assembly faces the included angle of the inner side of the limiting plate.

[0005] Preferably, the clamping assembly includes a fixed base, a screw, a rotating rod, a clamping seat, and a connecting member; the fixed base is fixed to the base and located on the right side of the support plate; the screw passes through the fixed base and is threadedly connected to the fixed base, and the axial direction of the screw is consistent with the direction of the slide groove; the rotating rod is fixed to the right end of the screw; the clamping seat is located at the left end of the screw through the connecting member; the clamping seat is slidably disposed in the slide groove.

[0006] Preferably, the clamping seat is a box-shaped structure with open top and right ends, and the front and rear sides of the clamping seat are slidably connected to the two side walls of the slide groove, respectively.

[0007] Preferably, the connector includes a connecting rod vertically fixed inside the clamping seat, and a limiting nut sleeved on the upper part of the connecting rod; the connecting rod slides through the screw, and the lower end of the limiting nut is pressed against the screw.

[0008] Preferably, the connector includes a fixing post vertically fixed in the clamping seat, and a pin disposed on the screw and located on the left side of the fixing post; the screw slides through the fixing post.

[0009] Preferably, the limiting plate is composed of multiple layers of sub-plates stacked together.

[0010] Preferably, a U-shaped hole is provided at the inner corner of the limiting plate.

[0011] Preferably, the length direction of the right side plate is perpendicular to the length direction of the left side plate.

[0012] Preferably, the support plate, the limiting plate, and the fixing seat are all fixed to the base by bolts.

[0013] Preferably, the clamping seat has a rubber pad at one end near the limiting plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: Through the three-point radial clamping structure of the support plate, L-shaped limiting plate, and height-adjustable clamping seat, combined with the design that the thickness of the limiting plate is less than the workpiece thickness and the top of the clamping seat is lower than the upper end face of the workpiece, the obstruction of the clamping components to the grinding path of the upper and lower main end faces of the workpiece is completely eliminated, achieving interference-free grinding. Simultaneously, the multi-layer sub-plate stacking design of the limiting plate enables convenient thickness adjustment, and the adjustable height design of the clamping seat and the clamping range guided by the slide groove adapt to mounting discs or rear cover workpieces of different outer diameters and thicknesses, significantly improving the versatility and applicability of the tooling. This structure is simple and reliable, and the clamping operation is convenient, effectively solving the problem of traditional chuck clamping of protruding end faces hindering grinding, avoiding repeated disassembly and adjustment, greatly improving grinding efficiency and quality, ensuring the complete removal of burrs from the main end face of the workpiece, thereby guaranteeing the assembly accuracy and working performance of the nozzle ring. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram of the clamping component structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the limiting plate structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0019] In the diagram: 1 Support plate, 2 Limiting plate, 3 Clamping assembly, 4 Base, 5 Mounting plate, 11 Slide groove, 21 Right side plate, 22 Left side plate, 23 U-shaped hole, 31 Fixing seat, 32 Screw, 33 Clamping seat, 34 Rotating rod, 35 Connecting rod, 36 Limiting nut, 37 Fixing post, 38 Pin. Detailed Implementation

[0020] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand how to practice this utility model. Although this utility model has been described in conjunction with its preferred embodiments, these embodiments are merely illustrative and not intended to limit the scope of this utility model.

[0021] This utility model provides a positioning fixture for grinding the main end face of a nozzle ring mounting plate or rear cover. This fixture aims to solve the problem in existing technologies where the chuck jaws protrude from the workpiece end face, hindering grinding. Its core lies in providing a non-protruding upper surface clamping solution, ensuring unobstructed grinding.

[0022] See Figure 1-3 In one embodiment of this utility model, a positioning fixture for grinding nozzle rings is mainly used for grinding the mounting plate or back cover of the nozzle ring. It includes: a support plate 1, a limiting plate 2, a clamping assembly 3, and a base 4. The support plate 1 and the clamping assembly 3 are both fixedly installed on the base 4. The limiting plate 2 is installed on the support plate 1 and corresponds to the position of the clamping assembly 3. The limiting plate 2 and the clamping assembly 3 work together to form a clamping fit for the workpiece.

[0023] Specifically, the support plate 1 is fixed to the base 4 by bolts, and a groove 11 is provided on the upper end of the support plate 1 along its length.

[0024] The limiting plate 2 is fixed to the support plate 1 by bolts; the limiting plate 2 is an L-shaped right-angle plate structure composed of a right side plate 21 and a left side plate 22 that are perpendicular to each other; the thickness of the limiting plate 2 is designed to be less than the thickness of the mounting plate 5 to be polished, so that the upper end of the mounting plate 5 can protrude from the limiting plate 2 after it is placed, and the limiting plate 2 itself does not obstruct the polishing operation; the limiting plate 2 is mounted on the slide groove 11, and the opening direction of the slide groove 11 is consistent with the angle formed by the length direction of the right side plate 21 and the left side plate 22, which can be understood as the right side plate 21 and the left side plate 22 being symmetrically arranged along the opening direction of the slide groove 11.

[0025] Furthermore, a U-shaped hole 23 is provided at the right angle on the inner side of the limiting plate 2. The U-shaped hole 23 is located above the slide groove 11. The larger gap formed by the U-shaped hole 23 makes it easier to remove the mounting plate 5.

[0026] The clamping assembly 3 includes a fixed base 31, a screw 32, a clamping seat 33, a rotating rod 34, and a connecting piece; the fixed base 31 is fixed to the base 4 by bolts and is located on the right side of the support plate 1; the screw 32 passes through the fixed base 31 in the left and right directions, and is threadedly connected to the fixed base 31, with the length direction of the screw 32 consistent with the opening direction of the slide groove 11; the rotating rod 34 is fixed to the right end of the screw 32 and is used to drive the screw to rotate;

[0027] The clamping seat 33 is located at the left end of the screw 32 and is connected to the screw 32 through a connector; the clamping seat 33 is a box-shaped structure with both the upper and right ends open, and the front and rear sides of the clamping seat 33 are respectively slidably engaged with the two side walls of the slide groove 11; the clamping seat 33 is set at a right angle toward the inner side of the limiting plate 2.

[0028] The connector includes a connecting rod 35 and a limiting nut 36. The connecting rod 35 is vertically fixed inside the clamping seat 33, and the upper part of the connecting rod 35 slides through the screw 32. The limiting nut 36 is threaded to the upper part of the connecting rod 35, and the lower end of the limiting nut 36 is pressed against the outer periphery of the screw 32. By turning the limiting nut 36, the vertical height of the clamping seat 33 relative to the screw 32 can be adjusted to accommodate mounting discs 5 of different thicknesses, and to ensure that the top of the clamping seat 33 is always lower than the upper surface of the mounting disc 5.

[0029] The horizontal height of the clamping seat 33 can be adjusted by rotating the limiting nut 36 to accommodate mounting discs 5 of different thicknesses. After installation, the top of the clamping seat 33 protrudes from the upper surface of the support plate 1, but is lower than the upper surface of the mounting disc 5. Rotating the rotating rod 34 allows the clamping seat 33 to work with the limiting plate 2 to radially clamp the mounting disc. In other words, this positioning fixture can clamp mounting discs or back covers with different outer diameters through three-point positioning. At the same time, the horizontal height of the execution end is lower than the horizontal height of the upper end of the part to be polished. During polishing, the polishing head can be positioned above this fixture to perform polishing operations on the main end face of the mounting disc or back cover.

[0030] Working principle: The mounting disc 5 to be ground is laid flat on the support plate 1, with its outer edge tangent to the right side plate 21 and left side plate 22 of the limiting plate 2, respectively, to complete the initial positioning; then, the rotating rod 34 drives the screw 32 to rotate. Since the screw 32 is threadedly connected to the fixed seat 31 and cannot move axially, the rotational motion is converted into the linear motion of the clamping seat 33 along the slide groove 11. The clamping seat 33 moves at a right angle to the inside of the limiting plate 2, forming a three-point positioning (two points on the limiting plate and one point on the clamping seat) with the limiting plate 2, realizing the radial clamping of the mounting disc 5; after clamping, the thickness of the limiting plate 2 is... The top of the clamping seat 33 is lower than the workpiece thickness and its top is lower than the upper end face of the workpiece. The top height of the clamping seat 33 is adjusted by the connecting parts (such as the limit nut 36) to ensure that the top of the clamping seat 33 is also lower than the upper end face of the workpiece. Therefore, all clamping components of this fixture (top surface of the limit plate, top surface of the clamping seat) do not protrude from the main end face of the workpiece to be ground. During the grinding operation, the grinding equipment (grinding head) can be set up above the fixture without obstruction to perform sufficient grinding operations on the upper and lower main end faces of the mounting plate 5, thoroughly remove the burrs generated after the opening, and ensure the smooth assembly and working performance of the nozzle ring.

[0031] In one embodiment, such as Figure 4 As shown, the connector includes a fixing post 37 and a pin 38. The fixing post 37 is vertically fixed inside the clamping seat 33. The screw 32 slides through the fixing post 37. The pin 38 is installed on the screw 32 and is located on the left side of the fixing post 37 to prevent the clamping seat 33 from detaching from the screw 32. The left end of the screw 32 abuts against the inner wall of the clamping seat 33. Compared with the aforementioned screw 32 applying force to the clamping seat 33 through the connecting rod 35, the screw 32 applying force directly to the clamping seat 33 can make the clamping force more stable.

[0032] In one embodiment, the limiting plate 2 is composed of multiple sub-plates stacked together. The overall thickness of the limiting plate 2 can be adjusted by increasing or decreasing the number of sub-plates to accommodate mounting discs 5 of different thicknesses.

[0033] In one embodiment, to avoid the fixture causing pressure damage to the mounting plate or rear cover, a rubber pad can be fixedly attached to the left end of the clamping seat 33 during implementation.

[0034] Through this technical solution, this positioning fixture effectively solves the problem of traditional chuck clamping hindering grinding by using an innovative L-shaped limiting plate, height-adjustable clamping seat, and three-point radial clamping design. It achieves stable and interference-free clamping of circular mounting plates or back covers, and has good size adaptability. It is designed for efficient and unobstructed grinding of their main end faces.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A positioning fixture for grinding nozzle rings, characterized in that: The system includes a support plate (1), a limiting plate (2), a clamping assembly (3), and a base (4). The support plate (1) is fixed on the base (4), and a groove (11) is provided on its upper end along the length direction. The limiting plate (2) is fixedly covered on the groove (11). The limiting plate (2) is an L-shaped plate structure composed of a right side plate (21) and a left side plate (22). The right side plate (21) and the left side plate (22) are symmetrically arranged along the opening direction of the groove (11). The clamping assembly (3) is fixed on the base (4), and the execution end of the clamping assembly (3) is slidably disposed in the groove (11). At the same time, the execution end of the clamping assembly (3) protrudes at least partially from the upper surface of the support plate (1). The execution end of the clamping assembly (3) faces the inner angle of the limiting plate (2).

2. The positioning fixture for nozzle ring grinding according to claim 1, characterized in that: The clamping assembly (3) includes a fixed seat (31), a screw (32), a rotating rod (34), a clamping seat (33), and a connector; the fixed seat (31) is fixed on the base (4) and located on the right side of the support plate (1); the screw (32) passes through the fixed seat (31) and is threadedly connected to the fixed seat (31), and the axial direction of the screw (32) is consistent with the direction of the slide groove (11); the rotating rod (34) is fixed to the right end of the screw (32); the clamping seat (33) is located at the left end of the screw (32) through the connector; the clamping seat (33) is slidably located in the slide groove (11).

3. The positioning fixture for nozzle ring grinding according to claim 2, characterized in that: The clamping seat (33) is a box-shaped structure with open top and right ends. The front and rear sides of the clamping seat (33) are slidably connected to the two side walls of the slide groove (11).

4. A positioning fixture for nozzle ring grinding according to claim 2, characterized in that: The connector includes a connecting rod (35) vertically fixed in the clamping seat (33) and a limiting nut (36) sleeved on the upper part of the connecting rod (35); the connecting rod (35) slides through the screw (32), and the lower end of the limiting nut (36) is pressed against the screw (32).

5. A positioning fixture for nozzle ring grinding according to claim 2, characterized in that: The connector includes a fixed post (37) vertically fixed inside the clamping seat (33) and a pin (38) provided on the screw (32) and located on the left side of the fixed post (37); the screw (32) slides through the fixed post (37); the left end of the screw (32) abuts against the inner wall of the clamping seat (33).

6. A positioning fixture for nozzle ring grinding according to claim 1, characterized in that: The limiting plate (2) is composed of multiple layers of sub-plates stacked together.

7. A positioning fixture for nozzle ring grinding according to claim 1, characterized in that: A U-shaped hole (23) is provided at the inner corner of the limiting plate (2).

8. A positioning fixture for nozzle ring grinding according to claim 1, characterized in that: The length direction of the right side plate (21) is perpendicular to the length direction of the left side plate (22).

9. A positioning fixture for nozzle ring grinding according to claim 2, characterized in that: The support plate (1), the limiting plate (2) and the fixing seat (31) are all fixed to the base (4) by bolts.

10. A positioning fixture for nozzle ring grinding according to claim 2, characterized in that: The clamping seat (33) has a rubber pad at one end near the limiting plate (2).

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