A positioning fixture for drilling a turbocharger housing flange

Abstract

This utility model discloses a positioning fixture for drilling turbocharger housing flanges, relating to the technical field of turbocharger housing positioning fixtures. It includes a positioning platform with a limit plate fixedly installed on its upper wall. A floating groove is provided inside the positioning platform, and an electric actuator is fixedly installed at the center of the bottom of the floating groove. An installation groove is fixedly installed at the telescopic end of the electric actuator, and a motor is fixedly installed inside the telescopic part of the electric actuator. This utility model utilizes an Archimedes spiral guide rail to rotate, causing a pressure block to extend and retract along several telescopic grooves. This allows it to adapt to turbocharger housing bodies of different bore diameters. Combined with the retraction of the electric actuator, the pressure block clamps the positioned turbocharger housing body from the inside. This solves the problem of existing turbocharger housing fixtures using external clamping, where the clamping force is not in the same direction as the drilling cutting force, resulting in significant vibration. Furthermore, the lack of an internal buffer structure during vibration affects machining accuracy.

Description

Technical Field

[0001] This utility model relates to the field of turbocharger housing positioning fixture technology, specifically a positioning fixture for drilling flanges of turbocharger housings. Background Technology

[0002] The use of turbochargers is an effective means to improve engine efficiency, reduce fuel consumption, and reduce exhaust emissions. Turbochargers can increase engine power by about 30%, significantly reduce fuel consumption, reduce the mass per unit power of the engine, reduce the engine's overall size, and reduce the number of cylinders or cylinder diameter; effectively solve the problem of reduced engine power caused by thin air in high-altitude areas; make fuel combustion more complete, reduce exhaust smoke concentration, which is beneficial to environmental improvement, and also reduce engine noise; when drilling flanges, it is necessary to use clamps for alignment and positioning. For example, the utility model patent with announcement number CN220093758U discloses a four-station turntable for processing turbocharger housings, including an outer shell and a drilling mechanism and a cutting mechanism fixed on the outside of the outer shell. The cutting mechanism consists of a cutting blade, a motor and a cylinder. It can not only facilitate the removal of the processed turbocharger housing, saving time and improving work efficiency, but also eliminate the need for workers to clean the inside of the outer shell, improving the ease of use of the four-station turntable. It can also collect waste chips in a unified manner, further improving the ease of use of the four-station turntable. However, this type of fixture uses an external clamping method, and the clamping force is not in the same direction as the cutting force of drilling, which will generate large vibrations. When vibrations occur, there is no internal buffer structure, which affects the machining accuracy. Furthermore, the positioning reference of the external clamping housing is not uniform, so the positioning accuracy is poor and it is not suitable for drilling, a process with high precision requirements. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a positioning fixture for drilling turbocharger housing flanges. It solves the technical problems of existing devices using external clamping, where the clamping force is not in the same direction as the cutting force of the drilling, resulting in significant vibration. Furthermore, the lack of internal buffering structure during vibration affects machining accuracy. Additionally, the inconsistent positioning reference of the external clamping housing leads to poor positioning accuracy, making it unsuitable for high-precision processes such as drilling.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a positioning fixture for drilling a turbocharger housing flange, comprising a positioning platform, a limit plate fixedly installed on the upper wall of the positioning platform, a floating groove provided inside the positioning platform, an electric actuator fixedly installed at the bottom center of the floating groove, an installation groove fixedly installed at the telescopic end of the electric actuator, a motor fixedly installed inside the telescopic part of the electric actuator, a turntable fixedly installed at the drive end of the motor, the turntable being slidably connected to the installation groove via a guide ring, an Archimedean spiral guide rail fixedly installed on the upper wall of the turntable, a guide cover fixedly installed on the upper wall of the installation groove, a plurality of telescopic grooves opened in the guide cover along its radial direction, a pressure block slidably connected in the telescopic groove, and a guide groove engaging with the Archimedean spiral guide rail on the lower wall of the pressure block.

[0005] Preferably, the outer wall of the electric actuator is provided with a plurality of sliding grooves, and an annular cone is fitted on the outer wall of the electric actuator. The annular cone is slidably connected in the sliding groove by a guide block, and a return spring is provided between the annular cone and the floating groove.

[0006] Preferably, a spring retaining sleeve for fixing the reset spring is fixedly installed on the lower wall of the annular cone, and the spring retaining sleeve is slidably connected to the electric push rod.

[0007] Preferably, a load-bearing block is fixedly installed on the side wall inside the telescopic groove, and auxiliary grooves are provided on both sides of the pressure block, with the auxiliary grooves slidably connected to the load-bearing block.

[0008] Preferably, the telescopic part of the electric actuator has several heat dissipation holes.

[0009] Preferably, a rib is fixedly installed between the limiting plate and the positioning platform.

[0010] Beneficial effects This utility model provides a positioning fixture for drilling holes in a turbocharger housing flange, which has the following advantages: When the Archimedes spiral guide rotates, it drives the pressure block to extend and retract along several telescopic grooves, which can adapt to turbocharger housings with different bore diameters. With the retraction of the electric push rod, the pressure block clamps the positioned turbocharger housing from the inside. This solves the problem that the existing turbocharger housing clamps use an external clamping method, and the clamping force is not in the same direction as the cutting force of the drilling, which will produce large vibrations. When vibration occurs, there is no internal buffer structure, which affects the machining accuracy. When clamping turbocharger housings with different inner diameters, the height of the turbocharger housing on the annular cone changes. By moving the annular cone up and down along the electric push rod, the turbocharger housing can contact the upper surface of the positioning platform, ensuring support stability. The cooperation of several sliding grooves and guide blocks ensures the limiting accuracy. This solves the problem of inconsistent positioning references for the outer clamping housing, which resulted in poor positioning accuracy and was not suitable for high-precision processes such as drilling. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 A sectional view; Figure 3 This is a schematic diagram of the annular frustum structure of this utility model; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is a schematic diagram of the guide cover structure of this utility model.

[0012] In the diagram: 1. Positioning platform; 2. Limiting plate; 3. Floating groove; 4. Electric actuator; 5. Mounting groove; 6. Motor; 7. Turntable; 8. Guide ring; 9. Archimedes spiral guide rail; 10. Guide cover; 11. Telescopic groove; 12. Pressure block; 13. Guide groove; 14. Slide groove; 15. Annular cone; 16. Guide block; 17. Return spring; 18. Spring retaining sleeve; 19. Turbocharger housing body; 20. Load-bearing block; 21. Auxiliary groove; 22. Heat dissipation hole; 23. Rib plate. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0014] Please see Figures 1-5 A positioning fixture for drilling a turbocharger housing flange includes a positioning platform 1. A limit plate 2 is fixedly installed on the upper wall of the positioning platform 1. A floating groove 3 is provided inside the positioning platform 1. An electric actuator 4 is fixedly installed at the bottom center of the floating groove 3. An installation groove 5 is fixedly installed at the telescopic end of the electric actuator 4. A motor 6 is fixedly installed inside the telescopic part of the electric actuator 4. A turntable 7 is fixedly installed at the drive end of the motor 6. The turntable 7 is slidably connected to the installation groove 5 by a guide ring 8. An Archimedes spiral guide rail 9 is fixedly installed on the upper wall of the turntable 7. A guide cover 10 is fixedly installed on the upper wall of the installation groove 5. Several telescopic grooves 11 are opened in the radial direction inside the guide cover 10. A pressure block 12 is slidably connected in the telescopic grooves 11. A guide groove 13 that meshes with the Archimedes spiral guide rail 9 is opened on the lower wall of the pressure block 12.

[0015] Please see Figure 3 The outer wall of the electric actuator 4 is provided with several sliding grooves 14. An annular cone 15 is fitted on the outer wall of the electric actuator 4. The annular cone 15 is slidably connected in the sliding grooves 14 through the guide block 16. A return spring 17 is provided between the annular cone 15 and the floating groove 3. In use, the cooperation between the sliding groove 14 and the guide block 16 provides a stable trajectory for the up and down sliding of the annular cone 15, ensuring that the annular cone 15 is accurately aligned with the longitudinal air outlet of the turbocharger housing body 19. When the turbocharger housing body 19 is removed, the return spring 17 can push the annular cone 15 to move upward, so that the annular cone 15 can fit tightly against the bottom of the turbocharger housing body 19 when it is clamped next time.

[0016] Please see Figure 3 A spring fixing sleeve 18 for fixing the reset spring 17 is fixedly installed on the lower wall of the annular cone 15. The spring fixing sleeve 18 is slidably connected to the electric push rod 4. In use, the spring fixing sleeve 18 provides fixed support for the reset spring 17, preventing the spring from shifting or falling off during the extension and retraction process, ensuring that the reset spring 17 always exerts force along the axis of the electric push rod 4, and further ensuring the smooth sliding of the annular cone 15 and the reliability of the reset.

[0017] Please see Figure 5 The side wall inside the telescopic groove 11 is fixedly installed with a load-bearing block 20. The two sides of the pressure block 12 are provided with auxiliary grooves 21. The auxiliary grooves 21 are slidably connected to the load-bearing block 20. When in use, the cooperation between the load-bearing block 20 and the auxiliary groove 21 can support the pressure block 12 and provide auxiliary support when the pressure block 12 presses the turbocharger housing body 19.

[0018] Please see Figure 4 The telescopic part of the electric actuator 4 is provided with several heat dissipation holes 22. When in use, the heat dissipation holes 22 can dissipate the heat generated by the motor 6 in a timely manner, so as to avoid the motor 6 being in a high temperature environment for a long time, which would lead to performance degradation or damage, extend the service life of the motor 6, and at the same time ensure the stability of the telescopic movement of the electric actuator 4, so as not to affect the positioning efficiency of the fixture.

[0019] Please see Figure 1 A rib plate 23 is fixedly installed between the limiting plate 2 and the positioning platform 1. When in use, the rib plate 23 can enhance the connection strength between the limiting plate 2 and the positioning platform 1, prevent the limiting plate 2 from bending or deforming when subjected to the lateral force of the shell, ensure that the limiting plate 2 always maintains a stable positioning posture, and further improve the reliability of the lateral positioning of the shell.

[0020] In this embodiment, when the Archimedes spiral guide rail 9 rotates, it drives the pressure block 12 to extend and retract along several telescopic grooves 11, which can adapt to turbocharger housing bodies 19 with different apertures. With the retraction of the electric push rod 4, the pressure block 12 clamps the positioned turbocharger housing body 19.

[0021] Meanwhile, when turbocharger housings 19 with different inner diameters are clamped, the height of the turbocharger housing 19 on the annular cone 15 changes. By moving the annular cone 15 up and down along the electric push rod 4, the turbocharger housing 19 can contact the upper surface of the positioning table 1, ensuring support stability.

[0022] Specifically, the operator places the transverse air outlet of the turbocharger housing 19 against the limiting plate 2 (the rib plate 23 between the limiting plate 2 and the positioning platform 1 enhances the support strength and prevents the limiting plate 2 from deforming under force), then inserts it downwards onto the annular cone 15. Next, the electric actuator 4 at the bottom of the floating groove 3 is activated. The telescopic end of the electric actuator 4 drives the mounting groove 5 upwards until the guide cover 10 on the mounting groove 5 is higher than the turbine groove surface of the turbocharger housing 19 (ensuring that the pressure block 12 can contact the flange surface after extension). The electric actuator 4 is then closed. Next, the motor 6 inside the telescopic part of the electric actuator 4 is activated. The drive end of the motor 6 drives the turntable 7 to rotate smoothly within the mounting groove 5 via the guide ring 8 (the guide ring 8 limits the radial offset of the turntable 7, ensuring coaxial rotation). The Archimedes spiral guide rail 9 on the upper wall of the turntable 7 rotates synchronously with the turntable 7. The guide groove 13 on the lower wall of the pressure block 12 engages with the Archimedes spiral guide rail 9. The spiral structure of the Archimedes spiral guide rail 9 converts the rotation into radial rotation of the pressure block 12. The pressure block 12 extends outward along the telescopic groove 11 of the guide cover 10 if the housing aperture is large; if the aperture is small, the pressure block 12 retracts inward. After adjusting the extension position of the pressure block 12, the electric actuator 4 is activated in the opposite direction to clamp the turbine groove surface through the pressure block 12, thereby completing the clamping of the turbocharger housing body 19. After clamping, the lower wall surface of the turbocharger housing body 19 is in contact with the positioning table 1. At this time, the movement and steering freedom of the turbocharger housing body 19 are limited. During this process, the heat dissipation holes 22 opened in the telescopic part of the electric push rod 4 continuously dissipate the heat generated by the operation of the motor 6 (the motor 6 is fixed inside the telescopic part of the electric push rod 4), so as to avoid the high temperature of the motor 6 causing performance degradation and to ensure the stability of subsequent actions. During the clamping process of the pressure block 12, the auxiliary grooves 21 on both sides of it slide with the load-bearing blocks 20 on the side wall of the telescopic groove 11. The load-bearing blocks 20 provide vertical support for the pressure block 12, preventing the pressure block 12 from tilting due to excessive clamping force and sharing the clamping force of the load-bearing blocks 20.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for drilling a turbocharger housing flange, characterized by The system includes a positioning platform (1), a limiting plate (2) is fixedly installed on the upper wall of the positioning platform (1), a floating groove (3) is provided inside the positioning platform (1), an electric push rod (4) is fixedly installed at the bottom center of the floating groove (3), an installation groove (5) is fixedly installed at the telescopic end of the electric push rod (4), a motor (6) is fixedly installed inside the telescopic part of the electric push rod (4), a turntable (7) is fixedly installed at the drive end of the motor (6), the turntable (7) is slidably connected to the installation groove (5) by a guide ring (8), an Archimedes spiral guide rail (9) is fixedly installed on the upper wall of the turntable (7), a guide cover (10) is fixedly installed on the upper wall of the installation groove (5), a plurality of telescopic grooves (11) are opened in the guide cover (10) along its radial direction, a pressure block (12) is slidably connected in the telescopic groove (11), and a guide groove (13) that meshes with the Archimedes spiral guide rail (9) is opened on the lower wall of the pressure block (12).

2. A positioning fixture for drilling a turbocharger housing flange according to claim 1, characterized in that The outer wall of the electric push rod (4) is provided with several sliding grooves (14), and the outer wall of the electric push rod (4) is fitted with an annular cone (15). The annular cone (15) is slidably connected in the sliding groove (14) through a guide block (16). A reset spring (17) is provided between the annular cone (15) and the floating groove (3).

3. A positioning fixture for drilling a turbocharger housing flange according to claim 2, characterized in that The lower wall of the annular cone (15) is fixedly equipped with a spring fixing sleeve (18) for fixing the reset spring (17), and the spring fixing sleeve (18) is slidably connected to the electric push rod (4).

4. A positioning fixture for drilling a turbocharger housing flange according to claim 1, characterized in that The side wall inside the telescopic groove (11) is fixedly installed with a load-bearing block (20), and the two sides of the pressure block (12) are provided with auxiliary grooves (21), which are slidably connected to the load-bearing block (20).

5. A positioning fixture for drilling a turbocharger housing flange according to claim 1, characterized in that The telescopic part of the electric actuator (4) is provided with several heat dissipation holes (22).

6. A positioning fixture for drilling a turbocharger housing flange according to claim 1, characterized in that A rib plate (23) is fixedly installed between the limiting plate (2) and the positioning platform (1).

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