A special tooling fixture for installing a silencer in a volute

Abstract

The utility model provides a special tool fixture of installing silencer in scroll casing. It can effectively control assembly accuracy, and the assembly consistency is better, reduces the rate of defective products, reduces manual cost, and production efficiency is higher. It includes support unit, the support unit is provided with the positioning unit for fixed scroll casing, the drive unit for installing silencer, the positioning unit includes the locating circular platform, the locating circular platform is installed in the tool table, the both sides fixed mounting first limit structure of locating circular platform, first limit structure restricts scroll casing axial movement, the side portion of locating circular platform is equipped with the second limit structure of preventing scroll casing circumference rotation, drive unit is suspended above positioning unit through support unit support, the piston rod of cylinder of drive unit is equipped with fixed part, fixed part clamps silencer, silencer with the fixed scroll casing of positioning unit, center axis is coaxial.

Description

Technical Field

[0001] This utility model relates to the field of volute assembly technology, specifically to a special tooling fixture for installing a muffler inside a volute. Background Technology

[0002] To effectively control exhaust noise within the turbine housing without sacrificing turbocharger power, a muffler is installed within the turbine housing. In actual production, the turbine housing and muffler are typically installed using an interference fit, relying mainly on manual pressurization during assembly. This method demands a high level of installation experience and skill from the workers, making it difficult to guarantee assembly accuracy and consistency. Furthermore, it is prone to problems such as incorrect installation and damage caused by hard friction between parts due to human error, resulting in production efficiency that cannot meet market demands. Utility Model Content

[0003] To address the current problems of difficulty in ensuring assembly accuracy, poor assembly consistency, and low production efficiency when assembling the volute housing and muffler, this utility model provides a special tooling fixture for installing the muffler inside the volute housing. It can effectively control assembly accuracy, achieve better assembly consistency, increase product assembly quality, reduce defect rate, reduce labor costs, and simultaneously increase production efficiency.

[0004] The technical solution adopted by this utility model is: a special tooling fixture for installing a muffler inside a volute, characterized in that: it includes a support unit, wherein the support unit is provided with a positioning unit for fixing the volute and a driving unit for installing the muffler; The positioning unit includes a positioning frustum, which is mounted on a tooling table. A first limiting structure is fixedly installed on both sides of the positioning frustum, which restricts the axial movement of the volute. A second limiting structure is installed on the side of the positioning frustum to prevent the volute from rotating circumferentially. The drive unit is supported and suspended above the positioning unit by a bracket unit. The piston rod of the cylinder of the drive unit is equipped with a fixing component. The fixing component clamps a muffler. The muffler and the volute housing fixed to the positioning unit are coaxial.

[0005] Its further features are: The first limiting structure includes two limiting cylinders, and the push rods of the two limiting cylinders are respectively detachably mounted with pressure arms. The contact surfaces of the pressure arms and the volute are respectively provided with protective pressure plates. The second limiting structure includes a screw fixing seat, on which an adjustable screw is installed. The protruding end of the adjustable screw is fitted with a screw sleeve, and the screw sleeve presses against the end face of the volute opening side. The drive unit includes a fixedly installed drive cylinder, and a detachable cylinder connector is installed on the top of the push rod of the drive cylinder. The cylinder connector is detachably installed on the fixed component via a guide device. The guiding device includes a connecting plate, on which two guide posts are fixedly mounted. The guide posts are slidably mounted on the support unit via a connector. The support unit includes a support plate and a base plate, and the support plate and the base plate are connected by four support columns to form a frame. The limiting cylinder and the driving cylinder are pneumatically connected to the lever, which is fixedly installed at both ends of the support plate.

[0006] In the above structure of this utility model, the positioning unit fixes the volute housing to be installed on the tooling table. The limit cylinder can precisely control the clamping force of the volute housing axial limit, ensuring consistent clamping effect and avoiding improper operation during manual clamping that could lead to insufficient fixing or excessive clamping that could damage the quality of the parts. The muffler to be installed is fixed on the drive unit and suspended above the positioning unit by the bracket unit. The central axis of the volute housing to be assembled and the muffler are aligned to ensure the coaxiality of the assembly. The installation process also uses cylinder drive, which can precisely control the force during the pressing process of the muffler and ensure consistent product installation effect. The first limiting structure has two limiting cylinder protective pressure plates to ensure that the parts are not over-tightened and damaged when fixing the volute. The screw sleeve at the adjustable screw extension end of the second limiting structure protects the smoothness of the volute opening side end face and prevents top pressure wear. The guide devices on both sides of the drive cylinder further improve the stability of the drive unit when it performs its operation, avoid damage between parts caused by assembly errors, and at the same time, they can distribute the clamping force during the installation process, resulting in more even force distribution, which further ensures the consistency of assembly, a lower defect rate, and higher production efficiency. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial structural schematic diagram of the positioning unit of this utility model; Figure 3 This is a partial structural diagram of the drive unit and support unit of this utility model; Figure 4 This is a schematic diagram of the disassembled structure of the drive unit of this utility model.

[0008] In the diagram: 1. Positioning unit; 11. Positioning frustum; 12. Limiting cylinder; 13. Pressure arm; 14. Protective pressure plate; 15. Screw fixing seat; 16. Adjustable screw; 17. Screw sleeve; 2. Drive unit; 21. Drive cylinder; 22. Cylinder connector; 23. Connecting plate; 24. Fixing component; 25. Guide post; 26. Connector; 27. First lever; 28. Second lever; 3. Support unit; 31. Base plate; 32. Support column; 33. Support plate. Detailed Implementation

[0009] The present invention will be further described in detail below with reference to embodiments: like Figures 1 to 4 As shown, this utility model provides a special tooling fixture for installing a muffler inside a volute housing. It includes a support unit 3, which is provided with a positioning unit 1 for fixing the volute housing and a driving unit 2 for installing the muffler. The base plate 31 and the support plate 33 of the support unit 3 are connected by four support columns 32 forming a frame. To ensure the stability of the tooling, the size of the base plate 31 is designed to be slightly larger than that of the support plate 33. Positioning unit 1 includes a positioning frustum 11, which is mounted on a tooling table. First limiting structures are fixedly installed on both sides of the positioning frustum 11, restricting the axial movement of the volute housing. These first limiting structures include two limiting cylinders 12, each with a pressure arm 13 mounted on its push rod. Protective pressure plates 14 are provided on the contact surfaces between the pressure arms 13 and the volute housing to prevent surface damage caused by friction during clamping and assembly. The sides of the positioning frustum 11 are fitted with features to prevent circumferential rotation of the volute housing. The second limiting structure includes a screw fixing seat 15, an adjustable screw 16 is installed on the screw fixing seat 15, a screw sleeve 17 is fitted on the extended end of the adjustable screw 16, and the screw sleeve 17 presses against the end face of the volute opening side. By adjusting the extension length of the adjustable screw 16, it is pressed against the end face of the volute opening side. The screw sleeve 17 is set on the top of the adjustable screw 16 to avoid collision and scratch between metal parts, which can not only ensure the product assembly quality, but also extend the service life of the tooling fixture. The drive unit 2 is supported and suspended above the positioning unit 1 by the bracket unit 3. It includes a fixedly mounted drive cylinder 21. A detachable cylinder connector 22 is mounted on the top of the push rod of the drive cylinder 21. The cylinder connector 22 is detachably mounted on the fixed component 24 via a guide device. The fixed component 24 is used to clamp the muffler. The muffler and the volute housing fixed to the positioning unit 1 are coaxial. The drive unit 21 mainly relies on the drive cylinder 21 to install the muffler into the volute housing. The push rod end of the drive cylinder 21 is threadedly connected to the cylinder connector 22, and the cylinder connector 22 is fixedly mounted to the fixed component 24 with bolts. To enhance the stability of the push rod extension end of the drive cylinder 21, guide devices are provided on both sides of the drive cylinder 21. The guide devices include a connecting plate 23, on which two guide posts 25 are fixedly installed. The two guide posts 25 are slidably installed on the bracket unit 3 through the connector 26. The design of the guide device can accurately control the movement trajectory of the muffler during the assembly process and stabilize its spatial posture. When guiding the muffler to be pressed into the volute, it ensures that the load is evenly distributed and avoids excessive local stress that could damage the tooling. The limiting cylinder 12 and the driving cylinder 21 are pneumatically connected to the first lever 27 and the second lever 28, respectively. The first lever 27 and the second lever 28 are fixedly installed at both ends of the support plate 33. By operating the first lever 27, the push rod of the limiting cylinder 12 is controlled to retract. At this time, the pressure arm 13 is pressed down, thereby restricting the axial movement freedom of the volute. When disassembly is required, the first lever 27 is operated to control the limiting cylinder 12 to extend. At this time, the pressure arm 13 is released upward, and the component can be removed. By operating the second lever 28, the push rod of the driving cylinder 21 is controlled to extend, performing the action of installing the muffler clamped in the fixed component 24 into the volute. After installation, the second lever 28 is used to control the push rod of the driving cylinder 21 to retract to the set limit position.

[0010] In this invention, each unit of the tooling can be disassembled and assembled. If necessary, the adaptability of the tooling can be optimized by modifying the positioning elements to achieve the same pressing process for similar parts. The process uses pneumatic components to control the action and combines a guiding device to precisely control the drive trajectory. This not only ensures the cleanliness requirements of the production process but also meets the process requirements of assembly. It has higher control precision, improves production efficiency, reduces unnecessary labor costs, and results in higher consistency and better quality assurance of the assembled products.

[0011] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all modifications or improvements made without departing from the spirit and concept of the present invention are within the protection scope of the present invention.

Claims

1. A special tooling fixture for installing a silencer inside a volute casing, characterized in that: It includes a support unit, which is provided with a positioning unit for fixing the volute and a drive unit for installing the muffler; The positioning unit includes a positioning frustum, which is mounted on a tooling table. A first limiting structure is fixedly installed on both sides of the positioning frustum, which restricts the axial movement of the volute. A second limiting structure is installed on the side of the positioning frustum to prevent the volute from rotating circumferentially. The drive unit is supported and suspended above the positioning unit by a bracket unit. The piston rod of the cylinder of the drive unit is equipped with a fixing component. The fixing component clamps a muffler. The muffler and the volute housing fixed to the positioning unit are coaxial.

2. The special tooling fixture for installing a silencer inside a volute casing according to claim 1, characterized in that: The first limiting structure includes two limiting cylinders, and the push rods of the two limiting cylinders are respectively detachably mounted with pressure arms. The contact surfaces of the pressure arms and the volute are respectively provided with protective pressure plates.

3. A special tooling fixture for installing a silencer inside a volute casing according to claim 2, characterized in that: The second limiting structure includes a screw fixing seat, on which an adjustable screw is installed. The protruding end of the adjustable screw is fitted with a screw sleeve, which presses against the end face of the volute opening side.

4. A special tooling fixture for installing a silencer inside a volute casing according to claim 3, characterized in that: The drive unit includes a fixedly installed drive cylinder, and a detachable cylinder connector is installed on the top of the push rod of the drive cylinder. The fixed component is detachably installed on the cylinder connector via a guide device.

5. A special tooling fixture for installing a silencer inside a volute casing according to claim 4, characterized in that: The guiding device includes a connecting plate, on which two guide posts are fixedly mounted. The guide posts are slidably mounted on the support unit via connectors.

6. A special tooling fixture for installing a silencer inside a volute casing according to claim 5, characterized in that: The support unit includes a support plate and a base plate, which are connected by four support columns to form a frame.

7. A special tooling fixture for installing a silencer inside a volute casing according to claim 6, characterized in that: The limiting cylinder and the driving cylinder are pneumatically connected to the lever, which is fixedly installed at both ends of the support plate.

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