Welding fixture for open membrane disc assembly

Abstract

The application relates to a welding tool suitable for an open membrane disc assembly, a base plate is arranged on a mandrel, a pressing plate, a pressing spring and a pressing sleeve are sleeved on the mandrel above the base plate, a locking nut is arranged on the outer thread of the mandrel, at least one layer of clamping blocks is arranged on the outer side of the mandrel, and each layer of clamping blocks has four clamping blocks; each clamping block comprises a clamping block body and a clamping strip, the inner side surface of the clamping block body is a cylindrical surface, an even number of clamping strips are fixed on the inner side surface of each clamping block body in the height direction, and each clamping strip is arranged along the radial direction of the inner side surface of the clamping block body; the inner side surfaces of the four clamping blocks in each layer of clamping blocks are coaxially arranged, the distance from the axis of the mandrel to the inner side surfaces of the four clamping blocks in each layer of clamping blocks is equal, and the corresponding clamping strips on the adjacent clamping blocks in each layer of clamping blocks form a 90-degree included angle. The application realizes the improvement of the assembly efficiency of the open membrane disc assembly before welding, and provides a technical guarantee for the welding qualification rate of the open membrane disc assembly.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tooling fixture, and discloses a welding tool suitable for open membrane disc assembly. BACKGROUND

[0002] The membrane disc coupling is one of the key parts of the transmission system of an aero-engine. Since the membrane disc material is elastic, the membrane disc coupling can compensate for the misalignment between the driving and driven components. When the driving component is far away from the driven component, two membrane disc couplings can be used as double couplings to achieve greater axial offset compensation. Because of the need for vibration-free power transmission, service life and maintenance-free, the demand for membrane disc couplings is increasing, especially for high-speed drivers.

[0003] The open membrane disc assembly is provided with four square air holes with an included angle of 90 degrees on the outer edge of each open membrane disc. The two sides of the open membrane disc are hyperbolic profiles, and the entire open membrane disc assembly has strict geometric accuracy requirements. Since the open membrane disc assembly is a flexible thin-walled part, it needs to be linearly arranged by using a tool with 2 to 8 open membrane discs. The open membrane discs are prone to relative movement and large deformation error, so special welding tools must be used to ensure the dimensional accuracy of the open membrane disc assembly during assembly before welding.

[0004] The current size accuracy adjustment method before welding generally uses a deflection instrument to repeatedly adjust the relative positions of the open membrane discs, so that the open membrane disc assembly meets the run-out value requirements. Since the open membrane discs are flexible thin-walled parts and the number is large, it takes a lot of time to adjust the position, and the assembly efficiency before welding is low. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a welding tool suitable for open membrane disc assembly, which can improve the assembly efficiency of the membrane disc assembly before welding and provide technical guarantee for the welding qualification rate of the open membrane disc assembly.

[0006] According to the technical scheme provided by the present application, the welding tool suitable for open membrane disc assembly comprises a mandrel, a pressing plate, a pressing spring, a pressing sleeve, a locking nut and a clamping block.

[0007] A base plate fixedly integrated with the mandrel is arranged on the mandrel, an external thread is arranged on the mandrel above the base plate, the pressing plate, the pressing spring and the pressing sleeve are sleeved on the mandrel above the base plate, the pressing spring is located above the pressing plate, the pressing sleeve is located above the pressing spring, the locking nut is installed on the external thread of the mandrel, the locking nut and the external thread segment of the mandrel are engaged through internal and external threads, and the open membrane discs to be welded are sleeved on the mandrel between the base plate and the pressing plate.

[0008] At least one layer of clamping blocks is arranged outside the mandrel, each layer of clamping blocks has four clamping blocks, and the four clamping blocks in each layer of clamping blocks are arranged at intervals around the mandrel.

[0009] Each clamping block comprises a clamping block body and a clamping strip, the inner side surface of the clamping block body is a cylindrical surface, an even number of clamping strips are fixed on the inner side surface of each clamping block body in the height direction, the clamping strips are cuboid structures, each clamping strip is arranged along the radial direction of the inner side surface of the clamping block body, and the distance between adjacent upper and lower clamping strips on each clamping block body is equal.

[0010] The inner side surfaces of the four clamping blocks in each layer of clamping blocks are coaxially arranged, the distance from the axis of the mandrel to the inner side surfaces of the four clamping blocks in each layer of clamping blocks is equal, and the corresponding clamping strips on adjacent clamping blocks in each layer of clamping blocks form an included angle of 90°.

[0011] Preferably, the compression spring is a disc spring.

[0012] Preferably, one layer of clamping blocks is arranged outside the mandrel, and each layer of clamping blocks has four clamping blocks.

[0013] Preferably, two, four, six or eight clamping strips are fixed on the inner side surface of each clamping block body in the height direction.

[0014] The present application improves the assembly efficiency of the open membrane disc assembly before welding, provides a technical guarantee for the welding qualification rate of the open membrane disc assembly, reduces the secondary processing of the open membrane disc assembly, and effectively improves the qualification rate of the open membrane disc assembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view of the open membrane disc assembly.

[0016] Figure 2 is a top view of the open membrane disc assembly.

[0017] Figure 3 is an assembly drawing of the welding tool.

[0018] Figure 4 is Figure 3 is an enlarged view of part A in

[0019] Figure 5 is a completed assembly drawing before welding.

[0020] Figure 6 is a front view of the mandrel in the present application.

[0021] Figure 7 is a top view of the clamping block in the present application.

[0022] Figure 8 is Figure 7B-B cross-sectional view of the B-B cross-sectional view of the DETAILED DESCRIPTION

[0023] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0024] A welding tool suitable for an open membrane disc assembly, comprising a mandrel 1, a pressing plate 2, a pressing spring 3, a pressing sleeve 4, a locking nut 5 and a clamping block 6;

[0025] A base plate 1.1 fixedly integrated with the mandrel 1 is arranged on the mandrel 1, as shown in Figure 6 An external thread is arranged on the mandrel 1 above the base plate 1.1, the pressing plate 2, the pressing spring 3 and the pressing sleeve 4 are sleeved on the mandrel 1 above the base plate 1.1, the pressing spring 3 is located above the pressing plate 2, the pressing sleeve 4 is located above the pressing spring 3, the pressing spring 3 is preferably a disc spring, the locking nut 5 is installed on the external thread of the mandrel 1, the locking nut 5 and the external thread segment of the mandrel 1 are engaged through internal and external threads, and the open membrane disc to be welded is sleeved on the mandrel 1 between the base plate 1.1 and the pressing plate 2;

[0026] At least one layer of clamping blocks 6 is arranged on the outer side of the mandrel 1, each layer of clamping blocks 6 has four clamping blocks 6, and the four clamping blocks 6 in each layer of clamping blocks 6 are arranged at intervals around the mandrel 1;

[0027] As shown in Figure 7 and Figure 8 Each of the clamping blocks 6 comprises a clamping block body 6.1 and a clamping strip 6.2, the inner side surface of the clamping block body 6.1 is a cylindrical surface, an even number of clamping strips 6.2 are fixed on the inner side surface of each clamping block body 6.1 in the height direction, each clamping strip 6.2 is arranged along the radial direction of the inner side surface of the clamping block body 6.1, and the distance between the adjacent upper and lower clamping strips 6.2 on each clamping block body 6.1 is equal;

[0028] The inner side surfaces of the four clamping blocks 6 in each layer of clamping blocks 6 are coaxially arranged, the distance from the axis of the mandrel 1 to the inner side surfaces of the four clamping blocks 6 in each layer of clamping blocks 6 is equal, and the corresponding clamping strips 6.2 on the adjacent clamping blocks 6 in each layer of clamping blocks 6 form a 90° angle.

[0029] The best, in the outer side of the mandrel 1 is arranged a layer of clamping block 6, each layer of clamping block 6 has 4 blocks. In the inner side height direction of each clamping block body 6.1, 2, 4, 6 or 8 clamping strips 6.2 are fixed.

[0030] As shown in Figure 1 and Figure 2 The open membrane disc assembly is formed by welding four open membrane discs 10, four open angles of 90° are arranged on the outer edge of each open membrane disc 10, the width of the open 10.1 is 1 / 3-1 / 2 of the overall thickness of the open membrane disc 10, the length of the open 10.1 is slightly larger than its width, and in the case of some large-diameter open membrane discs 10, the length of the open 10.1 can be appropriately increased.

[0031] The four openings 10.1 on adjacent open membrane discs 10 are completely aligned, and after the welding of the open membrane disc assembly is completed, the channel formed by the combination of the upper and lower openings 10.1 will still be retained and will not be blocked. On the one hand, the channel plays a role in preventing the occurrence of blockage in the joint or preventing the deposition of impurities such as grease. During the use of the open membrane disc assembly, these impurities are naturally discharged from the channel during rotation; on the other hand, during the welding process of the open membrane disc assembly, the channel can balance the internal and external air pressure of the open membrane disc assembly, preventing the open membrane disc assembly from causing non-linear compression or expansion of the thin-walled flexible membrane disc due to air pressure imbalance, thereby causing deformation of the entire open membrane disc assembly.

[0032] When 2 clamping strips 6.2 are fixed in the inner side height direction of each clamping block body 6.1, the open membrane disc assembly to be welded is composed of only 2 open membrane discs; when 4 clamping strips 6.2 are fixed in the inner side height direction of each clamping block body 6.1, the open membrane disc assembly to be welded is composed of 4 open membrane discs, and the structure of the open membrane disc assembly is shown in Figure 1 and Figure 2 When 6 clamping strips 6.2 are fixed in the inner side height direction of each clamping block body 6.1, the open membrane disc assembly to be welded is composed of 6 open membrane discs; when 8 clamping strips 6.2 are fixed in the inner side height direction of each clamping block body 6.1, the open membrane disc assembly to be welded is composed of 8 open membrane discs.

[0033] When the open membrane disc assembly to be welded is composed of 4 or more even-numbered open membrane discs, two or more layers of clamping blocks 6 can be arranged on the outer side of the mandrel 1 to meet the welding needs of the open membrane disc assembly.

[0034] The following 4 open membrane discs 10 are welded into an open membrane disc assembly to illustrate the specific working process of the present application:

[0035] Step 1: vertically place the mandrel 1 on a horizontal plane, the bottom of the mandrel 1 can be fixed by using a fixer;

[0036] Step 2: install 3 open membrane discs 10 on the mandrel 1, manually rotate the 2 open membrane discs 10 at the bottom to make the positions of the openings 10.1 completely aligned;

[0037] Step 3: insert the lowermost clamping strip 6.2 on the clamping block 6 into the opening 10.1 of the 2 open membrane discs 10 at the bottom, rotate the third open membrane disc 10 to make its opening 10.1 aligned with the uppermost clamping strip 6.2 on the clamping block 6, and sequentially complete the installation of the 4 clamping blocks 6;

[0038] Step 4: align the uppermost clamping strip 6.2 on the clamping block 6, and install the fourth open membrane disc 10 on the mandrel 1;

[0039] Step 5: sequentially install the pressing plate 2, the pressing spring 3, the pressing sleeve 4 and the locking nut 5 to press the 4 open membrane discs 10, as shown in Figure 3 and Figure 4 ;

[0040] Step 6: adjust the runout of the open membrane disc assembly by using a runout instrument to make it meet the geometric accuracy requirements, sequentially remove the four clamping blocks 6, and complete the installation of the open membrane disc assembly before welding, as shown in Figure 5 .

[0041] By using the present application, the adjustment time of the open membrane disc assembly before welding can be reduced, and the assembly efficiency of the open membrane disc assembly can be effectively improved.

[0042] In the present application, the materials of the mandrel 1, the base plate 1.1, the pressing plate 2, the pressing spring 3, the pressing sleeve 4, the locking nut 5 and the clamping block 6 can be high-temperature alloy, stainless steel or maraging steel, etc.

[0043] In the present application, the material of the open membrane disc 10 can be titanium alloy, inconel alloy, stainless steel or maraging steel, etc.

[0044] In the present application, the clamping block 6 can be driven by electricity, gas or hydraulic pressure to make the clamping block 6 close to or away from the mandrel 1.

[0045] In the present application, the clamping block body 6.1 can be in the shape of a rectangle, a sector or other geometric shapes and combinations thereof.

[0046] In the present application, the clamping strip 6.2 on the clamping block 6 and the opening 10.1 on the open membrane disc 10 are in clearance fit, which can be selected as smaller clearance fit such as H7 / g6, H8 / g7, etc.

[0047] Finally, it should be noted that the above detailed description is merely illustrative of the technical solutions of the present application and is not limiting, and although the present application has been described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A welding fixture for an open membrane disc assembly, characterized by: It includes mandrel (1), pressing plate (2), compression spring (3), compression sleeve (4), locking nut (5) and clamping block (6); The bottom plate (1.1) is fixedly arranged on the mandrel (1), the outer thread is arranged on the mandrel (1) above the bottom plate (1.1), the pressing plate (2), the compression spring (3) and the compression sleeve (4) are sleeved on the mandrel (1) above the bottom plate (1.1), the compression spring (3) is located above the pressing plate (2), the compression sleeve (4) is located above the compression spring (3), the locking nut (5) is arranged on the outer thread of the mandrel (1), the locking nut (5) and the outer thread segment of the mandrel (1) are engaged through inner and outer threads, and the mandrel (1) between the bottom plate (1.1) and the pressing plate (2) is used for sleeving the open film disc to be welded; At least one layer of clamping blocks (6) is arranged on the outer side of the mandrel (1), each layer of clamping blocks (6) has four clamping blocks (6), and the four clamping blocks (6) in each layer of clamping blocks (6) are arranged at intervals around the mandrel (1); Each clamping block (6) comprises a clamping block body (6.1) and a clamping strip (6.2), the inner side surface of the clamping block body (6.1) is a cylindrical surface, an even number of clamping strips (6.2) are fixed on the inner side surface of each clamping block body (6.1) in the height direction, the clamping strip (6.2) is a cuboid structure, each clamping strip (6.2) is arranged along the radial direction of the inner side surface of the clamping block body (6.1), and the distance between the adjacent upper and lower clamping strips (6.2) on each clamping block body (6.1) is equal. The inner side surfaces of the four clamping blocks (6) in each layer of clamping blocks (6) are coaxially arranged, the distance from the axis of the mandrel (1) to the inner side surface of the four clamping blocks (6) in each layer of clamping blocks (6) is equal, and the corresponding clamping strips (6.2) on the adjacent clamping blocks (6) in each layer of clamping blocks (6) are at a 90° angle. The compression spring (3) is a disc spring.

2. The welding tool suitable for use with an open membrane disc assembly of claim 1, wherein: The inner side surface of each clamping block body (6.1) is fixed with two, four, six or eight clamping strips (6.2) in the height direction.

3. The welding tool for open membrane disc assemblies of claim 1 wherein: the welding tool is configured to weld the membrane to the disc. ​

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