Servo-driven turbine shell rocker arm welding tool

Abstract

This invention relates to a servo-driven turbine housing rocker arm welding fixture, belonging to the field of welding fixture technology. It includes a positioning component, a clamping component, a mistake-proofing component, and a control component. The positioning component includes a base and several positioning seats, which are respectively fixedly mounted on the base. The clamping component includes several clamping blocks and a power unit. The clamping blocks are respectively mounted on the base or positioning seats, with one end connected to the power end of the power unit. The mistake-proofing component includes a sensor and a data module. The sensor is respectively mounted on the positioning seats and the power unit, and is electrically connected to the data module to detect the positioning of the turbine housing, rocker arm, and bypass valve, and to detect the drive parameters of the power unit. The control component includes a controller and a data storage module. The power unit, the mistake-proofing component, and the data storage module are electrically connected to the controller. This invention provides a high degree of automation, high welding efficiency, and high welding precision in its welding fixture.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, specifically to a servo-driven turbine housing rocker arm welding fixture. Background Technology

[0002] The core working principle of a turbocharger is based on its special structure, using an electronic actuator to control the opening and closing of a bypass valve in the turbine housing assembly to regulate the engine's intake pressure and thus adjust power. In existing turbochargers, the bypass valve and rocker arm in the turbine housing assembly are connected by welding. The rocker arm is welded to the bypass valve's shaft, serving as part of the turbocharger's bypass valve actuator mechanism, and is used to control the opening and closing of the exhaust gas valve. The quality of the welding between the bypass valve shaft and the rocker arm directly determines the turbocharger's safe operating conditions and performance.

[0003] In existing technologies, the key functional characteristics of the bypass valve rotary table and rocker arm, such as welding angle, welding gap, and welding preload, are guaranteed by the stability of the welding fixture. Currently, turbocharger manufacturers mostly use manual or pneumatic fixtures for this process, which are cumbersome to operate, have long clamping cycles, and are prone to misalignment. This leads to drawbacks in mass production, such as a large amount of manual clamping, heavy workload, low component clamping and positioning accuracy, and ineffective monitoring and traceability of key process parameters. Consequently, the existing welding fixture's structural design and error-proofing features cannot achieve mass production and automation. Therefore, a turbine housing rocker arm welding fixture is needed to solve the problems of existing turbine housing rocker arm welding fixtures, including a large amount of manual clamping, heavy workload, low component clamping and positioning accuracy, and ineffective monitoring and traceability of key process parameters. Summary of the Invention

[0004] The purpose of this invention is to provide a welding fixture for a servo-driven turbine housing rocker arm to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a servo-driven turbine housing rocker arm welding fixture, comprising a positioning component, a clamping component, a fault-prevention component, and a control component. The positioning component includes a base and several positioning seats, which are respectively fixedly installed on the base for positioning and installing the turbine housing, rocker arm, and bypass valve. The clamping component includes several clamping blocks and a power unit. The clamping blocks are respectively installed on the base or positioning seats, and one end of each is connected to the power end of the power unit for clamping and fixing the turbine housing, rocker arm, and bypass valve on the positioning seats. The fault-prevention component includes a sensor and a data module. The sensor is respectively installed on the positioning seats and the power unit, and the sensor is electrically connected to the data module for detecting the positioning of the turbine housing, rocker arm, and bypass valve and detecting the drive parameters of the power unit. The control component includes a controller and a data storage module. The power unit, the fault-prevention component, and the data storage module are respectively electrically connected to the controller.

[0006] Preferably, the positioning seats are divided into turbine housing positioning seats, rocker arm positioning seats, and bypass valve positioning seats according to the positioning objects. The turbine housing positioning seat is fixedly installed on the base to form the main positioning seat. The rocker arm positioning seat and bypass valve positioning seat are respectively installed on the turbine housing positioning seat to form a predetermined positioning seat with the main positioning seat as the positioning position of the component. This invention uses the turbine housing positioning seat as the main positioning seat and installs the rocker arm positioning seat and bypass valve positioning seat on the main positioning seat for positioning and installation of the rocker arm and bypass valve, thereby reducing the cumulative positioning error between the turbine housing, rocker arm, and bypass valve and improving the positioning accuracy of the component. Simultaneously setting up the main positioning seat and the predetermined positioning seat allows the component unloading equipment to place the turbine housing on the main positioning seat and then place the rocker arm and bypass valve on the predetermined positioning seat for automatic loading and unloading, improving the automation level of the welding fixture.

[0007] Preferably, the turbine housing positioning seat includes a turbine housing center hole positioning seat and a turbine housing flange positioning seat; the turbine housing center hole positioning seat includes a column and a center hole column; the center hole column is fixedly installed on the column, and the center hole column has a stepped positioning surface with a tapered arc chamfer; the turbine housing flange positioning seat has a flange positioning block; the turbine housing is fitted onto the center hole column through the blade shaft hole, abuts against the stepped positioning surface through the turbine housing inlet surface, and is positioned and installed on the turbine housing positioning seat by abutting against the flange positioning block through the mounting flange; the rocker arm positioning seat is installed on the column; the bypass valve positioning seat is installed on the center hole column. This invention uses a turbine housing center hole positioning seat and a turbine housing flange positioning seat as positioning seats for the turbine housing. Specifically, a column is provided with a center hole column on the column, and a stepped positioning surface is provided on the center hole column. This allows the turbine housing blade shaft hole to be fitted onto the center hole column and positioned against the stepped positioning surface. Simultaneously, a flange positioning block is provided for the turbine housing mounting flange to be positioned against the flange. Under the action of the clamping block, the turbine housing's six degrees of freedom are restricted. The stepped positioning surface of this invention has a conical arc-shaped chamfer to prevent damage to components during the clamping process of turbine housing positioning and installation.

[0008] Preferably, the rocker arm positioning seat includes a rocker arm mounting plate and a rocker arm angle limiting block. The rocker arm mounting plate is fixedly or slidably mounted on the column, with one end extending towards the bypass valve shaft hole, forming a rocker arm pre-positioning portion between the rocker arm and the bypass valve shaft hole. The rocker arm angle limiting block is mounted on the column, with one end extending towards the rocker arm to form a limiting portion, on which a contact-type sensor is mounted. The rocker arm is mounted on the rocker arm pre-positioning portion, and its welding angle is limited by abutting against the limiting portion of the rocker arm angle limiting block. A distance measuring sensor is mounted on the rocker arm mounting plate, with the sensing end of the distance measuring sensor facing the contact-type sensor. This invention, by setting a rocker arm mounting plate, achieves the formation of a rocker arm pre-positioning portion between the rocker arm and the bypass valve shaft hole. Since the rocker arm mounting plate is mounted on the column, its position relative to the bypass valve shaft hole is fixed, thereby improving the positioning accuracy of the turbine housing and the rocker arm. Furthermore, to facilitate automatic loading of the rocker arm, the rocker arm mounting plate can be slidably mounted on the column, ensuring that the front and rear clamping of components does not cause positional conflicts and achieving the purpose of automatic loading and unloading. Additionally, the invention incorporates a rocker arm angle limiting block to control the welding angle of the rocker arm.

[0009] Preferably, the bypass valve positioning seat includes a support plate, with one end of the central bore extending away from the stepped positioning surface to the turbine housing exhaust port side to form an extension end; one end of the support plate is hinged to the extension end via an elastic element, and its free end forms the positioning part of the bypass valve. This invention facilitates automatic loading of the bypass valve by setting a support plate hinged to the central bore as a pre-positioned seat for the bypass valve. Since the bypass valve's shaft is installed in the bypass valve shaft hole, the bypass valve needs to be installed from the side at the bypass valve port of the turbine housing during installation. Furthermore, since the bypass valve's shaft is installed in the bypass valve shaft hole, the shaft also needs to be radially rotated into the bypass valve shaft hole. Existing welding fixtures do not have the function of automatically clamping bypass valves, requiring manual installation. During welding, a lifting device is also needed to prevent the bypass valve from falling due to its own weight, resulting in a large number of fixture components and low automation when welding bypass valves using existing welding fixtures. This invention utilizes a hinged support plate to enable bypass valve loading via a feeding device. The bypass valve is initially placed on the free end of the support plate, where the elastic element is compressed and stores energy. The bypass valve's shaft is positioned at the inlet of the bypass valve's shaft hole. As the feeding device moves out, the support plate rotates and resets around the hinge point under the elastic force of the elastic element, causing the bypass valve to move towards the exhaust valve port. Simultaneously, the bypass valve's shaft is inserted into the bypass valve's shaft hole, achieving the positioning and installation of the bypass valve.

[0010] Preferably, the stepped positioning surface and the flange positioning block are respectively provided with contact sensors to sense the positioning and installation of the turbine housing;

[0011] At least one clamping block is provided on both the turbine housing center hole positioning seat and the turbine housing flange positioning seat to fix and clamp the turbine housing to the positioning surface. The clamping blocks on the turbine housing center hole positioning seat and the turbine housing flange positioning seat are first lever-type clamping devices. The first lever-type clamping device includes a first lever hydraulic cylinder and a first clamping head. The first clamping head is hinged to the positioning seat, one end of which is connected to the power end of the first lever hydraulic cylinder, and the other end is a free end, forming a clamping part for the turbine housing. This invention improves the positioning accuracy of the turbine housing by setting contact sensors on the stepped positioning surface and the flange positioning block to sense whether the turbine housing is effectively positioned. At the same time, lever-type clamping devices are set on the turbine housing center hole positioning seat and the turbine housing flange positioning seat to achieve effective clamping of the turbine housing. In addition, compared with the push rod + slide rail clamping structure of the welding fixture in the prior art, the lever-type clamping device avoids the stress deformation caused by the continuous impact of long-term repeated use of the clamping device on the positioning seat, which leads to a decrease in the positioning accuracy of the positioning seat.

[0012] Preferably, the clamping block on the rocker arm positioning seat includes a rocker arm angle clamping block and a rocker arm pressing block; the rocker arm angle clamping block is a second lever-type clamping device; the second lever-type clamping device includes a second lever hydraulic cylinder and a second clamping head; the second clamping head is hinged to the rocker arm mounting plate, one end of which is connected to the power end of the second lever hydraulic cylinder, and the other end is a free end that clamps the rocker arm to the limiting part of the rocker arm angle limiting block; the rocker arm pressing block includes a pressing seat, a press, and a floating press head; the pressing seat is fixedly installed on the base, and it is provided with a slide rail towards the bypass valve shaft hole, and the floating press head... The pressure head is made of high-temperature and wear-resistant material and is slidably mounted on the slide rail; one end of the floating pressure head is connected to the power end of the press, and the other end is fitted with a pressure block as the clamping end; a reversing block is installed between the pressure block and the clamping end of the floating pressure head; the clamping end of the floating pressure head is provided with a first groove, and a first rotating shaft is provided in the first groove; the reversing block is mounted on the first rotating shaft and thus in the first groove by rotation; the reversing block is provided with a second groove, and a second rotating shaft perpendicular to the first rotating shaft is provided in the second groove; the pressure block is mounted on the second rotating shaft and thus in the second groove by rotation.

[0013] The press's power end is equipped with a first pressure sensor and a first power end displacement sensor, both electrically connected to a data module. This invention incorporates a second lever-type clamping device to clamp the rocker arm to the rocker arm angle limiting block, while a rocker arm clamping block presses the rocker arm towards the bypass valve shaft, thus simultaneously clamping the rocker arm and locking its welding angle. The rocker arm clamping block uses a universal floating pressure head made of high-temperature resistant material, ensuring the pressure head's lifespan through both material and mechanical structure improvements. This prevents failure of the rocker arm clamping block due to thermal deformation caused by laser welding heat and precision wear from repeated pressing, which would otherwise affect the crucial product characteristic of welding gap. Furthermore, the press's power end is equipped with a first pressure sensor and a first power end displacement sensor, both electrically connected to a data module. This allows for real-time monitoring of each clamping and pressing process during production, and the use of pressure-displacement curves to set boundary conditions ensures consistency between clamping force and displacement, thereby guaranteeing error prevention in the welding gap process.

[0014] Preferably, a bypass valve clamping block is installed on the base. The bypass valve clamping block includes a mounting plate, a valve face clamping block, and a shaft lifting block. The mounting plate is slidably installed on the base towards the bypass valve, and a first servo cylinder and a second servo cylinder are mounted on the mounting plate. The valve face clamping block is fixedly installed on the power end of the first servo cylinder to abut against the bypass valve in a direction perpendicular to the valve face of the bypass valve. The block of the shaft lifting block is hinged to the mounting plate, and one end of it is connected to the power end of the second servo cylinder, while the other end extends to the bottom of the bypass valve shaft to form a lifting end. The power ends of the first servo cylinder and the second servo cylinder are respectively provided with a second pressure sensor and a second power end displacement sensor, and the second pressure sensor and the second power end displacement sensor are electrically connected to the data module. This invention employs a valve face clamping block and a shaft lifting block to clamp and fix the bypass valve perpendicular to its valve face and along its shaft hole. This ensures a stable welding gap between the bypass valve and the rocker arm during welding, improving welding quality. The invention uses a first servo electric cylinder and a second servo electric cylinder as the power units for the valve face clamping block and the shaft lifting block. This avoids the fluctuations in clamping force caused by gas pressure fluctuations in pipelines, which are common in existing welding fixtures using pneumatic power units. This achieves stable clamping force during welding and uses a second pressure sensor and a second power end displacement sensor to define tolerances for pressure and displacement, effectively preventing errors in the clamping action and further improving welding quality.

[0015] Preferably, the error-proofing component further includes a photographic error-proofing unit and component identification codes; the photographic error-proofing unit includes a camera; the camera is equipped with an identification module, and its lens faces the welding area of ​​the rocker arm and bypass valve shaft; component identification codes are respectively set on the rocker arm and bypass valve, and the identification module is electrically connected to the data module. The welding fixture of this invention integrates a photographic error-proofing unit, which can automatically identify components such as the rocker arm and bypass valve to determine welding process abnormalities such as missing components, incorrect component models, incorrect component placement, incomplete welding, and weld misalignment, thereby reducing the risk of welding abnormalities. The identification module and data module of this invention are electrically connected to ensure that all detectable component characteristic parameters and process parameters are associated with the component body identification code and stored in the data storage module, realizing comprehensive management and precise traceability of the automated and data-driven production process.

[0016] Preferably, the control components also include a display screen and an alarm; the display screen and data module are electrically connected; the alarm and controller are electrically connected; the data storage module has a cloud storage unit; the controller also has a signal parameter editing module for editing parameters of one or more signals, including pneumatic signals, electrical signals, or PLC logic signals. This invention, by setting up a display screen and alarm, enables the visualization of drive parameters such as whether the component is effectively positioned during welding, the component clamping parameters before welding, and the displacement and pressure of the power unit's power end during welding. This facilitates real-time monitoring of the welding process, enabling daily monitoring and process inspection, as well as timely shutdown and alarm in case of process abnormalities. This invention also includes a signal parameter editing module to adapt data parameters for welding different models of turbine housing rocker arms, achieving functions such as automatic loading and unloading, one-click clamping, signal analysis and timely shutdown alarm for process abnormalities, data serialization, and cloud storage, ensuring the automation, datafication, and intelligence of the entire welding process. Beneficial effects

[0017] The servo-driven turbine housing rocker arm welding fixture of the present invention includes a positioning component, a clamping component, an error-proofing component, and a control component. The positioning component comprises several positioning seats, categorized according to the positioning object: a turbine housing positioning seat, a rocker arm positioning seat, and a bypass valve positioning seat, forming a main positioning seat. The rocker arm positioning seat and the bypass valve positioning seat are respectively installed on the turbine housing positioning seat to form a predetermined positioning seat with the main positioning seat as the component positioning position. By using the turbine housing positioning seat as the main positioning seat and installing the rocker arm positioning seat and the bypass valve positioning seat on the main positioning seat for positioning and installing the rocker arm and bypass valve, the present invention reduces the cumulative positioning error between the turbine housing, rocker arm, and bypass valve, thereby improving the component positioning accuracy. Simultaneously setting up the main positioning seat and the predetermined positioning seat allows the component unloading device to place the turbine housing on the main positioning seat and then place the rocker arm and bypass valve on the predetermined positioning seat, enabling automatic loading and unloading and improving the automation level of the welding fixture. Meanwhile, in order to ensure that the turbine housing, rocker arm and bypass valve are effectively positioned and installed, the present invention provides contact or contact plate sensors on the positioning seat or positioning surface to automatically sense the installation of the components and improve the positioning accuracy of the components.

[0018] Based on the foregoing, the clamping assembly of the present invention includes a turbine housing clamping device employing a first lever-type clamping device; and a rocker arm clamping device employing a second lever-type clamping device, which presses the rocker arm against the rocker arm angle limiting block. The lever-type clamping device avoids insufficient positioning accuracy caused by stress deformation due to continuous impact on the positioning seats of the turbine housing, rocker arm, and bypass valve components during long-term repeated use. A rocker arm clamping block is provided to press the rocker arm towards the bypass valve shaft hole. Furthermore, the rocker arm clamping block of the present invention uses a universal floating pressure head made of high-temperature resistant material to achieve a dual guarantee of the pressure plate's service life from both material and mechanical structure perspectives. This avoids clamping mechanism failure caused by thermal deformation due to laser welding heat and precision wear due to long-term repeated pressing, thus affecting the important product characteristic of welding gap. The bypass valve clamping device of this invention employs a valve face clamping block and a rotating shaft lifting block to clamp and fix the bypass valve perpendicular to the valve face and along the direction of the bypass valve's rotating shaft hole. This ensures that the welding gap between the bypass valve and the rocker arm remains stable during welding, improving welding quality. Furthermore, the bypass valve clamping device of this invention uses a servo electric cylinder as the power unit to avoid the fluctuations in clamping force caused by pipeline air pressure fluctuations in existing welding fixtures that use pneumatic power units, thus achieving stable clamping force during welding.

[0019] Based on the foregoing, the error-proofing component of this invention includes a sensor and a data module. The sensor is respectively installed on the positioning seat and the power unit. A sensor is installed on the positioning seat or positioning surface to determine whether the turbine housing, rocker arm, and bypass valve are effectively positioned. A distance sensor is installed on the rocker arm mounting plate to prevent improper rocker arm installation that could lead to welding angle deviations. Pressure and displacement sensors are installed on the power ends of the press, the first servo cylinder, and the second servo cylinder, and are electrically connected to the data module to achieve process monitoring and error prevention of the pressing or clamping actions of each power unit by defining tolerances for pressure and displacement. Furthermore, the error-proofing component of this invention also includes a photographic error-proofing unit and a component identification code to automatically identify and determine the turbine housing, rocker arm, and bypass valve during the welding process. This ensures proper component placement, model identification, and avoidance of process abnormalities such as missed welds and weld misalignment, thereby reducing welding anomalies and improving the welding yield.

[0020] Building upon the foregoing, the control components of this invention further include a display screen and an alarm; the display screen and data module are electrically connected; the alarm and controller are electrically connected; the data storage module is equipped with a cloud storage unit; and the controller is further equipped with a signal parameter editing module for editing parameters of one or more signals, including pneumatic signals, electrical signals, or PLC logic signals. This configuration significantly improves the product characteristics (including welding angle, welding gap, and welding preload) generated during the welding process in mass production, with CPK values ​​all exceeding 1.67, greatly reducing the scrap rate of the welding process. The welding fixture of this invention enables automated loading and unloading, one-click clamping, signal analysis and timely shutdown alarms for process anomalies, data concatenation, and cloud storage, significantly improving production efficiency and solving various drawbacks of traditional manual clamping, such as cumbersome operation, high labor intensity, long clamping cycle time, and susceptibility to anomalies during the clamping process. In addition, the data module of the error prevention component of the present invention is electrically connected to the data storage module of the control component, so as to realize the design of various error prevention schemes and the effective judgment and implementation of process data storage and monitoring, which greatly improves the stability of the welding process, greatly reduces the risk of potential functional failure during welding, and realizes the automation, datafication and intelligence of the entire welding process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the welding fixture for the servo-driven turbine housing rocker arm in an embodiment.

[0022] Figure 2 This is a side view of the servo-driven turbine housing rocker arm welding fixture in an embodiment.

[0023] Figure 3 A schematic diagram of the turbine housing positioning seat of the servo-driven turbine housing rocker arm welding fixture in the embodiment (1);

[0024] Figure 4 A schematic diagram of the turbine housing positioning seat of the servo-driven turbine housing rocker arm welding fixture in the embodiment (2);

[0025] Figure 5 A schematic diagram of the turbine housing positioning seat of the servo-driven turbine housing rocker arm welding fixture in the embodiment (3);

[0026] Figure 6 A schematic diagram of the rocker arm positioning seat of the servo-driven turbine housing rocker arm welding fixture in the embodiment;

[0027] Figure 7 This is a schematic diagram of the bypass valve positioning seat of the welding fixture for the servo-driven turbine housing rocker arm in an embodiment. Detailed Implementation

[0028] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments.

[0029] Please see Figures 1-7 This embodiment provides a servo-driven turbine housing rocker arm welding fixture, including a positioning component, a clamping component, a mistake-proofing component, and a control component. The positioning component includes a base 1 and several positioning seats, which are fixedly installed on the base for positioning and installing the turbine housing A, rocker arm B, and bypass valve C. The clamping component includes several clamping blocks and a power unit. The clamping blocks are installed on the base or positioning seats, and one end of each block is connected to the power end of the power unit for clamping and fixing the turbine housing, rocker arm, and bypass valve on the positioning seats. The mistake-proofing component includes a sensor and a data module. The sensor is installed on the positioning seats and the power unit, and the sensor is electrically connected to the data module to detect the positioning of the turbine housing, rocker arm, and bypass valve and to detect the drive parameters of the power unit. The control component includes a controller and a data storage module. The power unit, the mistake-proofing component, and the data storage module are electrically connected to the controller.

[0030] In this embodiment, several positioning seats are divided into turbine housing positioning seat 2, rocker arm positioning seat 3 and bypass valve positioning seat 4 according to the positioning object; turbine housing positioning seat 2 is fixedly installed on base 1 to form a main positioning seat; rocker arm positioning seat 3 and bypass valve positioning seat 4 are respectively installed on turbine housing positioning seat 2 to form a predetermined positioning seat with the main positioning seat as the positioning position of the component.

[0031] Specifically, the turbine housing positioning seat 2 in this embodiment includes a turbine housing center hole positioning seat 20 and a turbine housing flange positioning seat 21. The turbine housing center hole positioning seat includes a column 201 and a center hole column 202. The center hole column 202 is fixedly installed on the column 201, and a stepped positioning surface 203 is provided on the center hole column, and the stepped positioning surface has a conical arc chamfer. The turbine housing flange positioning seat 21 is provided with a flange positioning block 210. The turbine housing A is sleeved on the center hole column through the blade shaft hole, abuts against the stepped positioning surface 203 through the turbine housing inlet surface, and is positioned and installed on the turbine housing positioning seat by abutting against the flange positioning block 210 through the mounting flange. The rocker arm positioning seat 3 is installed on the column 201. The bypass valve positioning seat 4 is installed on the center hole column 202. The stepped positioning surface and the flange positioning block of the turbine housing center hole positioning seat are respectively provided with contact sensors (not shown) to sense whether the turbine housing is effectively positioned and installed. In this embodiment, a clamping block 204 is provided on both sides of the column 201 on the turbine housing center hole positioning seat along the center line of the column, and a clamping block 204 is provided on the flange positioning block on the turbine housing flange positioning seat to fix and clamp the turbine housing to the positioning surface; specifically, the clamping blocks on the turbine housing center hole positioning seat and the turbine housing flange positioning seat are first lever-type clamping devices; the first lever-type clamping device includes a first lever hydraulic cylinder 205 and a first clamping head 206; the first clamping head is hinged to the positioning seat, one end of which is connected to the power end of the first lever hydraulic cylinder 205, and the other end is a free end to form a clamping part for the turbine housing.

[0032] Furthermore, the rocker arm positioning seat 3 of this embodiment includes a rocker arm mounting plate 30 and a rocker arm angle limiting block 31; the rocker arm mounting plate 30 is slidably mounted on the column 201 by connecting to the power end of the first cylinder 300, and one end of it extends toward the bypass valve shaft hole, forming a rocker arm pre-positioning part 301 between it and the bypass valve shaft hole; the rocker arm angle limiting block 31 is mounted on the column, and one end of it extends toward the rocker arm to form a limiting part 310, on which a contact sensor (not shown) is mounted; the rocker arm B is mounted on the rocker arm pre-positioning part 301, and it limits the welding angle of the rocker arm by abutting against the limiting part of the rocker arm angle limiting block; a laser rangefinder sensor 302 is mounted on the rocker arm mounting plate 30, and the sensing end of the laser rangefinder sensor faces the contact sensor. In this embodiment, the clamping block on the rocker arm positioning seat 3 includes a rocker arm angle clamping block 303 and a rocker arm pressing block 304. The rocker arm angle clamping block 303 is a second lever-type clamping device. The second lever-type clamping device includes a second lever hydraulic cylinder 305 and a second clamping head 306. The second clamping head 306 is hinged to the rocker arm mounting plate 30, one end of which is connected to the power end of the second lever hydraulic cylinder 305, and the other end is a free end that clamps the rocker arm B to the limiting part 310 of the rocker arm angle limiting block. The rocker arm pressing block 304 includes a pressing seat 307, a press 308, and a floating pressing head 309. The pressing seat 307 is fixedly installed on the rocker arm positioning seat 304. The base 1 has a slide rail facing the bypass valve shaft hole. The floating pressure head is made of high temperature and wear resistant material and is slidably installed on the slide rail. One end of the floating pressure head is connected to the power end of the press, and the other end is installed with a pressure block as the pressing end. A reversing block is installed between the pressure block and the pressing end of the floating pressure head. The pressing end of the floating pressure head has a first groove, and a first rotating shaft is provided in the first groove. The reversing block is installed in the first groove by rotating on the first rotating shaft. The reversing block has a second groove, and a second rotating shaft perpendicular to the first rotating shaft is provided in the second groove. The pressure block is installed in the second groove by rotating on the second rotating shaft.

[0033] Furthermore, the power end of the press is equipped with a first pressure sensor and a first power end displacement sensor, which are electrically connected to the data module respectively.

[0034] In addition, the bypass valve positioning seat 4 in this embodiment includes a support plate 40, with one end of the central hole column away from the stepped positioning surface extending to the turbine housing exhaust port side to form an extension end 41; one end of the support plate 40 is hinged to the extension end by a return spring, and its free end forms the positioning part of the bypass valve.

[0035] In this embodiment, a bypass valve clamping block 42 is installed on the base. The bypass valve clamping block includes a mounting plate 43, a valve face clamping block 44, and a rotating shaft lifting block 45. To avoid spatial conflict between the turbine housing positioning seat on the base and the mounting plate and to facilitate automatic feeding of the bypass valve, the base in this embodiment is provided with a sliding seat 46, a first transverse slide rail and a second transverse slide rail that are perpendicular to each other, as well as a second cylinder and a third cylinder. The sliding seat 46 is mounted on the first transverse slide rail in a transverse sliding motion relative to the turbine housing, and one end of it is connected to the power end of the second cylinder. The second transverse slide rail is mounted on the sliding seat in the direction of the bypass valve. The mounting plate 43 is slidably mounted on the second transverse slide rail, and one end of it is connected to the power end of the third cylinder. In addition, the mounting plate of this embodiment is equipped with a first servo cylinder 47 and a second servo cylinder 48; the valve face pressing block 44 is fixedly installed on the power end of the first servo cylinder to abut against the bypass valve in a direction perpendicular to the valve face of the bypass valve; the block of the rotating shaft lifting block 45 is hinged to the mounting plate, and one end of it is connected to the power end of the second servo cylinder, and the other end extends to the bottom of the bypass valve rotating shaft to form a lifting end; the power ends of the first servo cylinder and the second servo cylinder are respectively provided with a second pressure sensor and a second power end displacement sensor, and the second pressure sensor and the second power end displacement sensor are respectively electrically connected to the data module.

[0036] In addition, the error prevention component of this embodiment also includes a photographic error prevention unit 5 and a component identification code. The component identification code in this embodiment is a QR code. The photographic error prevention unit includes a camera. The camera is equipped with an identification module, and its lens faces the welding area of ​​the rocker arm and the bypass valve shaft. The component identification code is respectively set on the rocker arm and the bypass valve. The identification module is electrically connected to the data module.

[0037] Furthermore, the control components of this embodiment also include a display screen 6 and an alarm; the display screen and the data module are electrically connected; the alarm and the controller are electrically connected; the data storage module is equipped with a cloud storage unit; the controller is also equipped with a signal parameter editing module for editing parameters of one or more signals, including pneumatic signals, electrical signals, or PLC logic signals.

[0038] Working principle: Before using the servo-driven turbine housing rocker arm welding fixture in this embodiment, the operator selects the appropriate rocker arm and bypass valve according to the model and specifications of the turbine housing. Then, based on the model and specifications of the turbine housing, the operator selects the appropriate operating parameters in the controller's data storage module and chooses the corresponding operating mode. In this embodiment, when the welding fixture is in use, the turbine housing, rocker arm, and bypass valve are first moved to the welding fixture by the loading equipment. Then, the loading equipment clamps the turbine housing and moves it to the turbine housing positioning seat. The turbine housing blade shaft hole is fitted onto the central hole column until the turbine housing air inlet surface is abutted against the stepped positioning surface. At the same time, the turbine housing mounting flange is abutted against the flange positioning block. When the contact sensors on the stepped positioning surface and the flange positioning block detect that the turbine housing is effectively positioned, the loading equipment moves out. At this time, the welding fixture determines that the turbine housing is effectively positioned and controls the first lever hydraulic cylinder on the turbine housing positioning seat and the flange positioning block to start, so as to drive the first clamping head to clamp the turbine housing air inlet surface to the stepped positioning surface and the turbine housing mounting flange to the flange positioning block, respectively, thus completing the turbine housing positioning and clamping process. Similarly, the positioning and clamping of the rocker arm and bypass valve are also addressed. Since the turbine housing is already positioned and clamped, a pre-positioning part for the rocker arm is formed between the rocker arm mounting plate and the bypass valve shaft hole. However, because the bypass valve is not yet positioned and installed, the rocker arm cannot be welded against the bypass valve shaft. Therefore, the bypass valve needs to be positioned and installed first. Specifically, the bypass valve is moved in from the turbine housing exhaust port side by the feeding equipment and moved towards the positioning part of the bypass valve. During the movement, the bypass valve pushes the support plate to rotate around the hinge point, while simultaneously compressing the return spring to store energy until the free end of the support plate disengages from the side of the bypass valve and rotates back under the elastic force of the return spring, causing the bypass valve to move towards the exhaust valve port. Simultaneously, the bypass valve shaft is inserted into the bypass valve shaft hole, achieving the positioning and installation of the bypass valve. Then, the feeding equipment is removed, and the bypass valve is supported by the support plate to prevent it from falling due to its own weight. After the bypass valve is positioned and installed, the controller controls the second and third cylinders to drive the sliding seat, causing the mounting plate to slide towards the turbine housing. Simultaneously, the controller activates the first and second servo cylinders to drive the valve face clamping block and the shaft lifting block to press and fix the bypass valve perpendicular to its valve face and along its shaft hole. After the bypass valve is positioned and installed, the loading equipment moves the rocker arm to its pre-positioning position. When the contact sensor on the rocker arm angle limiting block senses the rocker arm, the controller controls the second lever hydraulic cylinder to drive the second clamping head to stop the rocker arm against the rocker arm angle limiting block. At the same time, the controller controls the press to drive the floating pressure head to press the rocker arm towards the bypass valve shaft, completing the rocker arm's positioning and installation.

[0039] After the turbine housing, rocker arm, and bypass valve are positioned and fixed, the rocker arm and bypass valve shaft can be automatically welded using automated welding equipment. The automatic feeding and one-click clamping of these components, controlled by error-proofing and control components, significantly improves production efficiency and solves various drawbacks of traditional manual clamping, such as cumbersome operation, high labor intensity, slow clamping cycle, and susceptibility to abnormalities. It is important to note that when automatically welding turbine housings of different models and specifications, the operator can perform multiple adaptation adjustments to the welding fixture through the signal parameter editing module of the control component to obtain compatible component and drive parameters. These parameters can be stored in the cloud via the data storage module and updated to ensure compatibility with welding of different turbine housing rocker arms.

[0040] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A servo-driven turbine housing rocker arm welding fixture, comprising a positioning assembly, a clamping assembly, a mistake-proofing assembly, and a control assembly, characterized in that: The positioning assembly includes a base and several positioning seats. The positioning seats are fixedly installed on the base for positioning the turbine housing, rocker arm, and bypass valve. The positioning seats are categorized according to the positioning object: turbine housing positioning seat, rocker arm positioning seat, and bypass valve positioning seat. The turbine housing positioning seat is fixedly installed on the base to form a main positioning seat. The rocker arm positioning seat and bypass valve positioning seat are respectively installed on the turbine housing positioning seat to form a pre-positioning seat with the main positioning seat as the component's positioning position. The clamping assembly includes several clamping blocks and a power unit. The clamping blocks are respectively installed on the base or positioning seat, and one end of each block is connected to the power end of the power unit to clamp and fix the turbine housing, rocker arm, and bypass valve on the positioning seat. The error prevention component includes a sensor and a data module. The sensor is respectively installed on the positioning seat and the power unit, and the sensor is electrically connected to the data module to detect the positioning of the turbine housing, rocker arm, and bypass valve and to detect the drive parameters of the power unit. The control component includes a controller and a data storage module. The power unit, the error prevention component, and the data storage module are electrically connected to the controller. The turbine housing positioning seat includes a turbine housing center hole positioning seat and a turbine housing flange positioning seat; the turbine housing center hole positioning seat includes a column and a center hole column; the center hole column is fixedly installed on the column, and the center hole column has a stepped positioning surface with a conical arc chamfer; the turbine housing flange positioning seat has a flange positioning block; the turbine housing is sleeved on the center hole column through the blade shaft hole, abuts against the stepped positioning surface through the turbine housing inlet surface, and is positioned and installed on the turbine housing positioning seat by abutting against the flange positioning block through the mounting flange; the stepped positioning surface and the flange positioning block are respectively provided with contact sensors to sense the positioning and installation of the turbine housing; the rocker arm positioning seat is installed on the column; the bypass valve positioning seat is installed on the center hole column; The rocker arm positioning seat includes a rocker arm mounting plate and a rocker arm angle limiting block; the rocker arm mounting plate is fixedly or slidably mounted on the column, and one end of it extends toward the bypass valve shaft hole, forming a rocker arm pre-positioning part between the rocker arm and the bypass valve shaft hole; the rocker arm angle limiting block is mounted on the column, and one end of it extends toward the rocker arm to form a limiting part, on which a contact sensor is mounted; the rocker arm is mounted on the rocker arm pre-positioning part, and it limits the welding angle of the rocker arm by abutting against the limiting part of the rocker arm angle limiting block; a distance sensor is mounted on the rocker arm mounting plate, and the sensing end of the distance sensor faces the contact sensor; The bypass valve positioning seat includes a support plate, and one end of the central bore post away from the stepped positioning surface extends to the turbine housing exhaust port side to form an extension end; one end of the support plate is hinged to the extension end through an elastic element, and its free end forms the positioning part of the bypass valve.

2. The servo-driven turbine housing rocker arm welding fixture according to claim 1, characterized in that, At least one clamping block is provided on the turbine housing center hole positioning seat and the turbine housing flange positioning seat respectively, for fixing and clamping the turbine housing to the positioning surface; the clamping blocks on the turbine housing center hole positioning seat and the turbine housing flange positioning seat are first lever-type clamping devices; the first lever-type clamping device includes a first lever hydraulic cylinder and a first clamping head; the first clamping head is hinged to the positioning seat, one end of which is connected to the power end of the first lever hydraulic cylinder, and the other end is a free end forming a clamping part for the turbine housing.

3. The servo-driven turbine housing rocker arm welding fixture according to claim 1, characterized in that, The clamping block on the rocker arm positioning seat includes a rocker arm angle clamping block and a rocker arm pressing block; the rocker arm angle clamping block is a second lever-type clamping device; the second lever-type clamping device includes a second lever hydraulic cylinder and a second clamping head; the second clamping head is hinged to the rocker arm mounting plate, one end of which is connected to the power end of the second lever hydraulic cylinder, and the other end is a free end that clamps the rocker arm to the limiting part of the rocker arm angle limiting block; the rocker arm pressing block includes a pressing seat, a press, and a floating press head; the pressing seat is fixedly installed on the base, and it is provided with a slide rail towards the bypass valve shaft hole, and the floating press head... The pressure head is made of high-temperature and wear-resistant material and is slidably mounted on the slide rail; one end of the floating pressure head is connected to the power end of the press, and the other end is fitted with a pressure block as the clamping end; a reversing block is installed between the pressure block and the clamping end of the floating pressure head; the clamping end of the floating pressure head is provided with a first groove, and a first rotating shaft is provided in the first groove; the reversing block is mounted on the first rotating shaft and thus in the first groove; the reversing block is provided with a second groove, and a second rotating shaft perpendicular to the first rotating shaft is provided in the second groove; the pressure block is mounted on the second rotating shaft and thus in the second groove. The press is equipped with a first pressure sensor and a first power end displacement sensor on its power end, and the first pressure sensor and the first power end displacement sensor are electrically connected to the data module respectively.

4. The servo-driven turbine housing rocker arm welding fixture according to claim 1, characterized in that, A bypass valve clamping block is installed on the base. The bypass valve clamping block includes a mounting plate, a valve face clamping block, and a shaft lifting block. The mounting plate is slidably installed on the base towards the bypass valve, and a first servo cylinder and a second servo cylinder are mounted on the mounting plate. The valve face clamping block is fixedly installed on the power end of the first servo cylinder to abut against the bypass valve in a direction perpendicular to the valve face of the bypass valve. The block of the shaft lifting block is hinged to the mounting plate, and one end of it is connected to the power end of the second servo cylinder, while the other end extends to the bottom of the bypass valve shaft to form a lifting end. The power ends of the first servo cylinder and the second servo cylinder are respectively provided with a second pressure sensor and a second power end displacement sensor, and the second pressure sensor and the second power end displacement sensor are electrically connected to the data module.

5. The servo-driven turbine housing rocker arm welding fixture as described in claim 1, characterized in that: The error-proofing component further includes a photographic error-proofing unit and a component identification code; the photographic error-proofing unit includes a camera; the camera is equipped with an identification module, and its lens faces the welding area of ​​the rocker arm and the bypass valve shaft; the component identification code is respectively set on the rocker arm and the bypass valve, and the identification module is electrically connected to the data module.

6. The servo-driven turbine housing rocker arm welding fixture according to claim 5, characterized in that, The control component also includes a display screen and an alarm; the display screen and the data module are electrically connected; the alarm and the controller are electrically connected; the data storage module is equipped with a cloud storage unit; the controller is also equipped with a signal parameter editing module for editing parameters of one or more signals, including pneumatic signals, electrical signals, or PLC logic signals.

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