Method for quick riveting and forming of turbine blades of a combined hydrodynamic torque converter

Abstract

The application discloses a kind of quick riveting forming methods of combined hydraulic torque converter turbine blade, it is related to turbine blade riveting technical field, solve the technical problem of low riveting efficiency caused by the poor versatility of existing turbine blade riveting tool, including to turbine blade complete assembly, in succession with the roller installation in tool holder to complete inner ring roller riveting processing, in succession with the roller through the transition joint with angle installation in tool holder to complete outer ring roller riveting processing;The present application is only needed to install the roller of inner ring roller riveting and the roller to the transition joint with different angle when rolling different angle blade lug, the use of transition joint improves the versatility of riveting tool, it is convenient to carry out quick riveting, it is convenient to carry out forming verification to different camber size, lug position, angle distribution impeller, simple, convenient, low in cost, strong applicability.

Description

Technical Field

[0001] This invention relates to the field of hydraulic torque converter technology, and more specifically to the field of turbine blade riveting technology. Background Technology

[0002] A hydraulic torque converter is a widely used hydraulic transmission component in vehicle transmission systems. It has excellent self-adaptability, extended-pitch speed change, and vibration reduction and isolation advantages. According to different manufacturing processes, it can be divided into cast hydraulic torque converters and combined (stamped and welded) hydraulic torque converters. Among them, the turbine assembly of the combined hydraulic torque converter is assembled by the mating of the turbine outer ring, turbine inner ring, and multiple turbine blades through the fit of the outer ring groove, inner ring groove, and blade lugs. The inner and outer rings and blades are made of stamped steel plates, and then the three parts are assembled by riveting and brazing.

[0003] Currently, the production of turbine assemblies in combined hydraulic torque converters mainly employs roll riveting to connect the blade lugs to the inner and outer rings of the turbine. The roll riveting process involves bending the exposed blade lugs of the inner and outer rings, achieving a close fit between the bent lugs and the surface of the inner or outer ring. The purpose of roll riveting is to bend and rivet the blade lugs onto the inner and outer rings of the turbine, connecting the inner ring, turbine blades, and outer ring into a single unit, preparing for subsequent brazing. To ensure the quality of the roll riveting process, it is divided into two steps: blade lug pre-bending and blade lug rolling.

[0004] Roller riveting machines are used in roll riveting, but they are non-standard special-purpose equipment. One type of roller riveting head can only process a specific model of impeller, which has poor versatility. When facing the development of new products and new structural combined impellers, especially when the inner / outer ring and the arc surface shape and size of the blades change, it is impossible to use the existing model of roller riveting head for trial production. The development and verification of the roller riveting forming process of new products cannot be verified quickly. It is necessary to redevelop a special roller riveting head that matches the new structure, which has a long cycle and high cost, affecting the riveting efficiency of the entire turbine blade. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problem of low riveting efficiency caused by the poor versatility of existing turbine blade riveting tools. This invention provides a method for rapid riveting of turbine blades in a combined hydraulic torque converter.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0007] A method for rapid riveting of turbine blades in a combined hydraulic torque converter includes the following steps:

[0008] S1 insert:

[0009] The turbine blades are inserted to complete the assembly of the turbine inner ring, turbine outer ring, and turbine blades;

[0010] S2 inner ring roller riveting:

[0011] Install the retractor on the tool holder and pre-retract the two blade lugs of the turbine inner ring so that the angle between the blade lugs and the surface of the turbine inner ring does not exceed 30°. Remove the retractor, install the roller on the tool holder, and roll the two blade lugs of the turbine inner ring so that the gap between the blade lugs and the surface of the turbine inner ring meets the requirements.

[0012] S3 outer ring roller riveting:

[0013] After completing the inner ring riveting, the turbine assembly is flipped over to perform riveting on the outer ring of the turbine.

[0014] Install the retractor on the tool holder through the transition joint, pre-retract the four blade lugs of the turbine outer ring so that the angle between the blade lugs and the surface of the turbine inner ring does not exceed 30°, remove the retractor, install the roller on the tool holder through the transition joint, and roll the four blade lugs of the turbine outer ring so that the gap between the blade lugs and the surface of the turbine inner ring meets the requirements.

[0015] The four blade lugs on the turbine outer ring have different angles and positions. When the blade lugs at different angles are tilted and rolled, the tilting rod and roller are installed on the transition joint with different included angles.

[0016] Preferably, the bottom end of the lever is provided with a hemispherical surface.

[0017] Preferably, the transition joint includes a first connecting rod, a second connecting rod, a snap-fit ​​groove, and a locking bolt. The connecting end of the push rod or roller is snapped into the snap-fit ​​groove and fixedly connected to the second connecting rod by the locking bolt. The first connecting rod is fixedly connected to the tool holder. The included angle between the first connecting rod and the second connecting rod is 90°+α.

[0018] Preferably, during the outer ring roller riveting process, the turning rod, the roller and the reference plane each have an included angle α, which is the included angle between the blade support and the reference plane, so that the blade support is pre-turned and rolled along the normal of the plane where the blade support is located.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. This invention uses a transition device to ensure uniform contact between the deflecting rod, the rolling cutter, and the support lugs. When deflecting and rolling blade lugs at different angles, it is only necessary to install the deflecting rod and roller of the inner ring roller riveting onto the transition joint with different included angles. The use of the transition joint improves the versatility of the riveting tool, facilitates rapid riveting, and makes it convenient to verify the formability of impellers with different arc surface dimensions, support lug positions, and angle distributions. This greatly improves the efficiency of new product development and forming process verification, and is simple and convenient to operate, low in cost, and highly applicable.

[0021] 2. The pre-tilting tool of the present invention is a tilting rod, the lower end of which is designed as a hemispherical surface, so that it can tilt two blade lugs at the same time, thereby improving the tilting efficiency.

[0022] 3. By setting the transition joint, the present invention ensures that the push bar and roller have an included angle α with the reference plane after installation, avoiding the problem of uneven force on one side of the support when the push bar and roller rivet the blade lug in the vertical direction. This allows the support lug to be pre-bent and rolled along the normal of the plane where the support lug is located, fitting snugly with the outer ring and ensuring the quality of the riveting. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the turbine blade structure;

[0024] Figure 2 This is a schematic diagram of the turbine inner ring being tilted down;

[0025] Figure 3 This is a schematic diagram of the inner ring roller riveting of the turbine;

[0026] Figure 4 This is a schematic diagram of the turbine outer ring being tilted.

[0027] Figure 5 This is a schematic diagram of the turbine outer ring roller riveting.

[0028] Reference numerals: 1-Turbine blade, 2-Blade lug, 3-Turbine inner ring, 4-Pulling rod, 401-Hemisphere, 5-Roller, 6-Turbine outer ring, 7-Transition joint, 701-First connecting rod, 702-Second connecting rod, 703-Snap-fit ​​groove, 704-Locking bolt. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0030] Example 1

[0031] This embodiment takes the rapid riveting of the turbine as an example. The turbine assembly of the hydraulic torque converter includes a turbine outer ring 6, a turbine blade 1 and a turbine inner ring 3. Before the roll riveting, the turbine blade 1 is first inserted to complete the assembly.

[0032] 1. Inner ring roller riveting

[0033] like Figure 1 , 2 As shown in Figure 3, when riveting the inner ring 3 of the turbine, first install the riveting rod 4 on the lathe tool post, install the turbine on the lathe worktable, and use a dial indicator for centering. After centering, feed the riveting head of the riveting rod 4 downward a certain distance, operate the lathe to complete the pre-riveting, so that the angle between the blade support 2 and the surface of the inner ring 3 of the turbine does not exceed 30°. After riveting, assemble the roller 5 through the bearing end cover, roller shaft, bearing, roller support and other components to obtain the riveting head. Then replace the riveting rod 4 on the lathe tool post with the riveting head. Given the parameters, the riveting of the inner ring can be completed.

[0034] The turbine inner ring 3 is connected to a single turbine blade 1 via two blade lugs 2. Analysis of the structure of the turbine inner ring 3 and the position of the blade lugs 2 shows that if the two blade lugs 2 of the inner ring are riveted separately, the riveting tool is prone to interference with the other lug due to the smaller size of the inner ring, affecting the forming quality of the riveting. Therefore, when riveting the lugs of the turbine inner ring 3, it is preferable to simultaneously pre-roll and roll the two blade lugs 2. Furthermore, simultaneously riveting the two blade lugs 2 of the inner ring also improves the efficiency of the riveting process.

[0035] A riveting tool for the inner ring was designed based on the 3-dimensional profile of the turbine inner ring. (See relevant documentation for further details.) Figure 2 and 3 The pre-reverse tool is a reverse lever 4, the lower end of which is designed as a hemispherical surface 401, so that it can reverse two blade lugs 2 at the same time, and the upper end is used to install on the lathe tool post. The rolling tool is a roller 5, the roller 5 profile is consistent with the inner ring profile, which facilitates the simultaneous rolling of the reverse blade lugs 2.

[0036] 2. Outer ring roller riveting

[0037] like Figure 1 , 4 As shown in Figure 5, when the turbine outer ring 6 is riveted, the four blade lugs 2 of the outer ring have different angles, so a transition device with different angles is required to rivet each blade lug 2 separately.

[0038] When tilting, since the bottom of the tilting rod 4 is a hemispherical surface 401, it can tilt blades at different angles. The tilting rod 4 is installed on the tool holder through the transition joint 7. The blade lugs 2 of the outer ring 6 of the turbine are pre-tilted so that the angle between the blade lugs 2 and the surface of the inner ring 3 of the turbine does not exceed 30°. The tilting of the outer ring blade lugs 2 is completed by rotating the operating table.

[0039] During the rolling process, the roller 5 is assembled with components such as bearing end cap, roller shaft, bearing, and roller support to obtain the roller riveting head. The roller riveting head is then mounted on the tool holder via a transition device, and the worktable rotates according to the set parameters.

[0040] After riveting the blade lug 2 at one angle, the transition joint 7 at another angle is then replaced to complete the riveting of the blade lug 2 at another angle, until the riveting operation is completed.

[0041] The turbine outer ring 6 and the turbine blade 1 are riveted together by four blade lugs 2, each with a different angle and position on the turbine outer ring 6. During the roll riveting process of the turbine outer ring 6, if the riveting rod 4 and roller 5 are both applied vertically to the blade lugs 2, uneven force on one side of the blade lugs 2 can easily occur. This prevents the blade lugs 2 from being pre-riveted and rolled along the normal direction of their plane, resulting in an excessively large gap between one side of the blade lugs 2 and the surface of the turbine outer ring 6 after roll riveting, affecting the quality of the roll riveting. To solve this problem, this invention designs an angled transition joint 7, so that after installation, the riveting rod 4 and roller 5 each have an included angle α with the reference plane. Simultaneously, the included angle α is also the angle between the blade lug 2 and the bottom reference plane.

[0042] The transition joint 7 includes a first connecting rod 701, a second connecting rod 702, a snap-fit ​​groove 703, and a locking bolt 704. The connecting end of the push rod 4 or roller 5 is snapped into the snap-fit ​​groove 703 and fixedly connected to the second connecting rod 702 by the locking bolt 704. The upper end of the first connecting rod 701 is fixedly connected to the tool holder. The included angle between the first connecting rod 701 and the second connecting rod 702 is 90°+α.

[0043] By setting the transition joint 7, the tilting rod 4 and the roller 5 are installed with an included angle α between them and the reference plane, so that the tilting rod 4 and the roller 5 are in uniform contact with the support ear. When tilting and rolling the blade support ear 2 at different angles, it is only necessary to install the tilting rod 4 and the roller 5 riveted to the inner ring onto the transition joint 7 with different included angles to achieve the pre-tilting and rolling of the blade support ear 2, and make the blade support ear 2 bend along its normal direction and fit with the outer ring.

Claims

1. A method for rapid riveting of turbine blades in a combined hydraulic torque converter, characterized in that, Includes the following steps: S1 insert: The turbine blade (1) is inserted to complete the assembly of the turbine inner ring (3), turbine outer ring (6) and turbine blade (1); S2 inner ring roller riveting: Install the jacking rod (4) on the tool holder, and at the same time pre-jacking the two blade lugs (2) of the turbine inner ring (3) so that the angle between the blade lugs (2) and the surface of the turbine inner ring (3) does not exceed 30˚. Remove the jacking rod (4), install the roller (5) on the tool holder, and at the same time roll the two blade lugs (2) of the turbine inner ring (3) so that the gap between the blade lugs (2) and the surface of the turbine inner ring (3) meets the requirements. S3 outer ring roller riveting: After completing the inner ring riveting, the turbine assembly is flipped over and the outer ring (6) of the turbine is riveted. Install the turn-down lever (4) on the tool holder through the transition joint (7), and pre-turn the four blade lugs (2) of the turbine outer ring (6) so that the included angle between the blade lugs (2) and the surface of the turbine inner ring (3) does not exceed 30˚. Remove the turn-down lever (4), install the roller (5) on the tool holder through the transition joint (7), and roll the four blade lugs (2) of the turbine outer ring (6) so that the gap between the blade lugs (2) and the surface of the turbine inner ring (3) meets the requirements. The four blade lugs (2) of the turbine outer ring (6) are at different angles and positions on the turbine outer ring (6). When the blade lugs (2) at different angles are knocked down and rolled, the knocking rod (4) and the roller (5) are installed on the transition joint (7) with different included angles. The bottom end of the lever (4) is provided with a hemispherical surface (401); The transition joint (7) includes a first connecting rod (701), a second connecting rod (702), a snap-fit ​​groove (703), and a locking bolt (704). The connecting end of the push rod (4) or roller (5) is snapped into the snap-fit ​​groove (703) and fixedly connected to the second connecting rod (702) by the locking bolt (704). The first connecting rod (701) is fixedly connected to the tool holder. The included angle between the first connecting rod (701) and the second connecting rod (702) is 90°+α. During the outer ring riveting process, the turning rod (4), the roller (5) and the reference plane each have an included angle α. The included angle α is the included angle between the blade support (2) and the reference plane, so that the blade support (2) is pre-turned and rolled along the normal of the plane where the blade support (2) is located.

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