A flame spray protective fixture for fan ring blade workpieces

Abstract

This utility model discloses a flame-spraying protective fixture for fan-shaped annular blade workpieces, which solves the shortcomings of the current lack of dedicated fixing fixtures and the impact of existing shielding methods on production efficiency when performing flame-spraying operations on fan-shaped annular blade workpieces. The fixture includes a fixture body and multiple sets of auxiliary workpieces. The fixture body includes an annular substrate and an annular cover ring. The annular substrate and annular cover ring cooperate with each other from below and above to clamp and fix the fan-shaped annular blade workpiece, exposing the spraying surface on the inner side of the annular ring of the fan-shaped annular blade workpiece. Each set of auxiliary components includes a sleeve, bolts, and T-shaped washers. The outer circumference of the sleeve is provided with a boss for supporting the annular substrate. The sleeves of multiple sets of auxiliary workpieces are evenly distributed on the work turntable or rectangular support by bolts and washers in a T-shape, which together provide horizontal support and fixation for the annular substrate and make the annular substrate coaxial with the work turntable.

Description

Technical Field

[0001] This utility model belongs to the field of thermal spraying technology, specifically relating to a flame spraying protective fixture for fan-shaped blade workpieces. Background Technology

[0002] Flame spraying technology uses a mixture of fuel gas or liquid and oxidizing gas in a certain proportion as a heat source to heat the material to a molten or semi-molten state, and then sprays it at high speed onto the surface of a pre-treated workpiece to form a firm surface layer. To meet the need for rotation when spraying ring-shaped parts, thermal spraying equipment is usually equipped with a rotating (motor-driven) support turntable. The turntable is circular with T-slots evenly distributed on it for mounting and clamping the tooling fixtures used to hold the parts to be sprayed. In addition, depending on the part, the turntable may also be equipped with rectangular supports with T-slots to raise the parts or tooling fixtures. The rectangular supports are mounted to the T-slots of the turntable using bolts and T-waists.

[0003] The inner side of the annular blade of a certain type of engine fan is the surface to be coated. Four annular blades are needed, which can be assembled into a complete circle. The inner and outer edges of the annular blades (i.e., the inner and outer rings of the workpiece) have flat bosses, with the blades slightly protruding from the inner edge. For non-coating areas adjacent to the inner side of the annular ring, especially the blades, masking is necessary to prevent metal or non-metal particles from being sprayed onto these areas. The traditional method is to apply high-temperature resistant tape to the non-coating areas, but this requires cleaning the tape and residue after coating, significantly impacting production efficiency and posing a risk of blade damage. Furthermore, to ensure coating quality, the spraying distance must be kept constant, requiring the annular blades to be fixed and positioned. However, there are currently no dedicated fixing fixtures, resulting in low production efficiency and susceptibility to human error.

[0004] Therefore, it is necessary to design a device that can both clamp and fix the fan-shaped blade workpiece and shield and protect it. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of the current flame spraying operation on fan-shaped blade workpieces, which lacks a dedicated fixing fixture and the existing shielding methods affect production efficiency, and to provide a protective fixture for flame spraying of fan-shaped blade workpieces.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A flame-spraying protective fixture for fan-shaped blade workpieces is characterized by comprising a fixture body and multiple sets of auxiliary workpieces.

[0008] The fixture body includes an annular substrate and an annular cover ring;

[0009] The annular substrate and the annular cover ring cooperate with each other from below and above to clamp and fix the fan annular blade workpiece, exposing the inner side of the fan annular blade workpiece to be sprayed.

[0010] Each set of auxiliary components includes a sleeve, a bolt, and a T-shaped washer; the outer circumferential surface of the sleeve is provided with a boss for supporting the annular substrate;

[0011] Multiple sets of auxiliary workpiece sleeves are evenly distributed on the work turntable or rectangular support using bolts and T-shaped washers (if a rectangular support is used to raise the tooling fixture, the auxiliary workpieces are directly set on the rectangular support; if a rectangular support is not used to raise the tooling fixture, the auxiliary workpieces are directly set on the work turntable, depending on the actual situation), together providing horizontal support and fixing to the annular substrate, and making the annular substrate coaxial with the work turntable, that is, the entire protective fixture is set coaxially with the work turntable.

[0012] Furthermore, the annular substrate is provided with grooves and bosses that mate with the outer and inner edges of the fan annular blade workpiece, and a U-shaped groove for accommodating the fan annular blade workpiece is provided in the middle.

[0013] The bottom surface of the annular cover ring is provided with a groove and a boss that mate with the outer and inner edges of the fan-shaped blade workpiece;

[0014] During installation, the fan-shaped annular blade workpiece is placed directly on the annular substrate, and the annular cover plate is placed directly on the fan-shaped annular blade workpiece. That is, the outer edge of the fan-shaped annular blade workpiece is placed in the outer groove of the annular substrate, and the inner edge of the fan-shaped annular blade workpiece is placed on the inner boss of the annular substrate; the outer groove of the annular cover plate is placed on the outer edge of the fan-shaped annular blade workpiece, and the annular cover plate is placed on the inner edge of the fan-shaped annular blade workpiece, which serves to stabilize the clamping and positioning as well as protect the non-coated areas.

[0015] Furthermore, in actual use, the four fan-shaped annular blades can be spliced ​​into a complete circle, so the annular cover ring can be assembled from four fan-shaped annular cover rings, which are placed on the four fan-shaped annular blade workpieces and spliced ​​into a complete circle, which can just protect the non-coated area of ​​the fan-shaped annular blade workpiece.

[0016] Furthermore, the sleeve is provided with countersunk holes and through holes (i.e., the countersunk holes and through holes form a stepped hole with a reduced diameter) along the axial direction from top to bottom in the middle part, for fixing the sleeve to the working turntable or rectangular support; the lower end of the sleeve is provided with a groove of the same width as the T-groove of the working turntable or the T-groove of the rectangular support, so that its installation angle is parallel to the T-groove of the working turntable or the T-groove of the rectangular support.

[0017] The boss provided on the outer circumference of the sleeve contacts the surface of the working turntable or rectangular support after the sleeve is installed on the working turntable or rectangular support.

[0018] Furthermore, the T-shaped washer is provided with threaded holes along the central axis to match the bolt, and can be installed in the T-slot of the work turntable or the T-slot of the rectangular support.

[0019] Furthermore, the auxiliary workpieces are arranged in three groups at 120° intervals to position and fix the annular substrate, ensuring that the annular substrate is coaxially set with the turntable.

[0020] Furthermore, the annular substrate and annular cover of the flame spraying protective fixture are made of aluminum alloy, while the sleeve, bolts, and gaskets are made of No. 45 steel.

[0021] Furthermore, the dimensions of the annular substrate and the annular cover plate can be designed according to the different sizes of fan annular blade workpieces, which can meet the clamping and protection of fan annular blade workpieces of different specifications.

[0022] The flame spraying protective fixture designed in this utility model can not only clamp and fix the fan-shaped blade workpiece, but also shield and protect the non-spraying area of ​​the workpiece. Specifically, it has the following advantages:

[0023] 1. After clamping and protecting the fan-shaped blade workpiece using the fixture of this utility model, it can be directly sprayed. The operation is simple and eliminates the need to stick high-temperature resistant tape to protect the non-spraying parts of the parts, as well as the steps of cleaning the tape and residual adhesive after spraying. This improves work efficiency and avoids the risk of bumping and scratching the fan-shaped blade workpiece when cleaning the tape.

[0024] 2. This utility model uses bolts, sleeves, and T-shaped washers to position and fix the annular substrate on the worktable or its rectangular support. The annular substrate has grooves and bosses that mate with the fan-shaped annular blade workpiece, allowing the workpiece to be placed directly on it for quick and efficient positioning and fixing. The annular cover ring also has grooves and bosses that mate with the fan-shaped annular blade workpiece, allowing it to be placed on the workpiece for convenient and quick clamping and fixing.

[0025] 3. The annular cover ring of this utility model is assembled from four fan-shaped annular cover rings, which reduces the weight of a single fan-shaped annular cover ring and reduces the workload.

[0026] 4. The annular substrate and annular cover ring of this utility model protective clamp are made of aluminum alloy, while the sleeve, bolts and gaskets are made of No. 45 steel. It has a long service life, saves a lot of high-temperature resistant tape, and reduces production costs. Attached Figure Description

[0027] Figure 1A schematic diagram of an existing work turntable structure with rectangular supports installed.

[0028] Figure 1 The labels in the attached figures are as follows:

[0029] 01-Turntable; 02-Rectangular support; 03-T-slot;

[0030] Figure 2 A simplified structural diagram of a fan-shaped annular blade workpiece;

[0031] Figure 2 The labels in the attached figures are as follows:

[0032] 04-Blade; 05-Surface to be coated;

[0033] Figure 3 This is a schematic diagram of the assembly of a flame spraying protective fixture for fan-shaped blade workpieces on a turntable.

[0034] Figure 4 A schematic diagram of the clamping structure of the fan-shaped blade workpiece with the annular base and the annular cover ring;

[0035] Figure 4 The labels in the attached figures are as follows:

[0036] 06-Inner ring boss of annular cover ring; 07-Inner edge of annular blade workpiece; 08-Inner ring boss of annular substrate;

[0037] 09-Outer groove of the annular cover ring; 10-Outer edge of the annular blade workpiece; 11-Outer groove of the annular substrate;

[0038] Figure 5 A schematic diagram of the installation of a flame-sprayed protective fixture for fan-shaped blade workpieces on a turntable;

[0039] Figure 5 The labels in the attached figures are as follows:

[0040] 12-Annular cover ring; 13-Bolt; 14-Annular substrate; 15-Sleeve; 16-T-shaped gasket.

[0041] Figure 6 This is a schematic diagram of a T-shaped gasket structure;

[0042] Figure 7 1. A schematic diagram of the sleeve structure; a. Schematic diagram of the overall sleeve structure; b. Cross-sectional view of the sleeve. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0044] like Figure 3-7As shown, the flame spraying protective fixture for fan-shaped blade workpieces includes a fixture body and three sets of auxiliary workpieces.

[0045] The fixture body includes an annular substrate and an annular cover ring. The annular substrate and the annular cover ring clamp and fix the fan-shaped annular blade workpiece from below and above, respectively, exposing the sprayed surface of the inner side of the fan-shaped annular blade workpiece. The annular substrate is provided with grooves and bosses that mate with the outer and inner edges of the fan-shaped annular blade workpiece (i.e., the outer groove of the annular substrate mates with the outer edge of the fan-shaped annular blade workpiece, and the inner boss of the annular substrate mates with the inner edge of the fan-shaped annular blade workpiece), and a U-shaped groove for accommodating the fan-shaped annular blade workpiece is provided in the middle. The bottom surface of the annular cover ring is provided with grooves and bosses that mate with the outer and inner edges of the fan-shaped annular blade workpiece (i.e., the outer groove of the annular cover ring mates with the outer edge of the fan-shaped annular blade workpiece, and the inner boss of the annular cover ring mates with the inner edge of the fan-shaped annular blade workpiece). The annular cover ring is composed of 4 fan-shaped annular cover rings, which are placed on the 4 fan-shaped annular blade workpieces and spliced ​​into a complete circle.

[0046] Three sets of auxiliary workpieces are arranged at 120° intervals and fixed to the T-slots of the rectangular support of the turntable. They are used to position and fix the annular substrate, ensuring that the annular substrate is coaxially positioned with the turntable. Each set of auxiliary components includes a sleeve, a bolt, and a T-shaped washer. The sleeve has a countersunk hole and a through hole along the axial direction from top to bottom, which are used to fix the sleeve to the rectangular support. The lower end of the sleeve has a groove of the same width as the T-slot of the rectangular support, so that its installation angle is parallel to the T-slot of the rectangular support. The outer circumference of the sleeve has a boss for supporting the annular substrate, and the bottom surface of the boss contacts the surface of the rectangular support after the sleeve is installed on the rectangular support.

[0047] The annular substrate and annular cover of the flame spraying protective fixture are made of aluminum alloy, while the sleeve, bolts and gaskets are made of No. 45 steel. The dimensions of the annular substrate and annular cover can be designed according to the different sizes of fan annular blade workpieces, which can meet the clamping and protection of fan annular blade workpieces of different specifications.

[0048] Instructions for using the above-mentioned protective clamps:

[0049] Based on the diameter of the annular substrate 14, three sleeves 15 are fixed at 120° intervals to the T-slots of the rectangular support of the turntable using bolts 13 and T-shaped washers 16. The annular substrate 14 is placed on the protrusion of the sleeve, ensuring that the annular substrate 14 is coaxial with the turntable. Then, the bolts 13 are tightened. After placing the fan annular blade workpiece on the annular substrate 14, the fan annular cover ring is placed on the fan annular blade workpiece in sequence to form a complete annular cover ring 12. This completes the positioning and fixing.

[0050] This utility model of protective clamp can quickly and accurately clamp and fix parts, and can also shield and protect non-sprayed parts of parts, thus meeting the needs of spray protection and solving the technical problem of low efficiency of existing spray protection solutions.

[0051] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model.

Claims

1. A flame-spraying protective fixture for fan-shaped blade workpieces, characterized in that: Includes the fixture body and multiple sets of auxiliary workpieces; The fixture body includes an annular substrate and an annular cover ring; The annular substrate and the annular cover ring cooperate with each other from below and above to clamp and fix the fan annular blade workpiece, exposing the inner side of the fan annular blade workpiece to be sprayed. Each set of auxiliary components includes a sleeve, a bolt, and a T-shaped washer; the outer circumferential surface of the sleeve is provided with a boss for supporting the annular substrate; Multiple sets of auxiliary workpiece sleeves are evenly distributed on the work turntable or rectangular support by bolts and T-shaped washers, which together provide horizontal support and fixation for the annular substrate and make the annular substrate coaxial with the work turntable.

2. The flame-spraying protective fixture for fan-shaped blade workpieces according to claim 1, characterized in that: The annular substrate is provided with grooves and bosses that mate with the outer and inner edges of the fan annular blade workpiece, and a U-shaped groove is provided in the middle to accommodate the fan annular blade workpiece. The bottom surface of the annular cover ring is provided with grooves and bosses that mate with the outer and inner edges of the fan-shaped blade workpiece.

3. The flame-spraying protective fixture for fan-shaped blade workpieces according to claim 2, characterized in that: The annular cover ring is assembled from four fan-shaped annular cover rings, which are placed on the four fan-shaped annular blade workpieces to form a complete circle.

4. The flame-spraying protective fixture for fan-shaped blade workpieces according to claim 3, characterized in that: The sleeve has a countersunk hole and a through hole that match the bolt along the axial direction from top to bottom in the middle part, and a groove with the same width as the T-groove of the working turntable or the T-groove of the rectangular support at the lower end of the sleeve. The boss on the outer circumference of the sleeve contacts the surface of the working turntable or rectangular support after the sleeve is installed on the working turntable or rectangular support.

5. The flame-spraying protective fixture for fan-shaped blade workpieces according to claim 4, characterized in that: The T-shaped washer has a threaded hole along its central axis that matches the bolt.

6. The flame-spraying protective fixture for fan-shaped blade workpieces according to any one of claims 1-5, characterized in that: The auxiliary workpieces are arranged in three groups, spaced 120° apart.

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