Method for press fitting an engine main housing

Abstract

The application relates to a pressing processing method of an engine main shell, which comprises the following steps: placing the main shell on a first pressing equipment, adopting floating self-centering installation for a type of pressing mechanism and an assembly position, and iteratively outputting a first information parameter of an information carrier; placing the main shell processed by the first pressing equipment on a second pressing equipment, obtaining the first information parameter of the information carrier, iteratively outputting a second information parameter of the information carrier; placing the main shell processed by the second pressing equipment on a solidification position, and connecting the main shell with part of a type of assembly parts and a type of assembly parts by using bonding glue; placing the main shell on a gas tightness detection device, performing pre-checking of the gas tightness detection; after checking, controlling a gas pressure mechanism to input compressed gas with a preset pressure into a detection channel of the main shell, performing constant pressure pressure maintaining detection, and iteratively inputting pressure test information into the information carrier. Electrical and physical double positioning pressing is adopted, and a complete traceability information chain is formed in the production process.

Description

Technical Field

[0001] This invention relates to the field of manufacturing technology, and in particular to a press-fitting method for an engine main housing. Background Technology

[0002] The engine main housing requires the installation of three types of components: a cup-shaped plug and an oil pipe head; a second type of component, a water outlet pipe and a expansion plug; and a third type of component, a manual riveting head for manual riveting operation. The cup-shaped plug and water outlet pipe are bonded to the mounting holes with adhesive. This adhesive requires a preset curing time to achieve maximum bonding strength. Insufficient curing time can lead to insufficient adhesion and bonding failure. This is especially problematic when the engine operates in a high-pressure, high-temperature environment; insufficient adhesive strength can cause engine malfunction.

[0003] The existing engine main housing uses multiple press-fitting machines to press-fit various components. This assembly process is random, which makes the press-fitting process of each engine main housing uncontrollable, making it difficult to form effective press-fitting traceability data, monitor the press-fitting parameters of each engine main housing component, and determine whether the adhesive has completed the required curing time. This leads to technical problems in the production process that make traceability and quality control difficult, and therefore improvement is needed. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this invention provides a press-fitting method for engine main housing, which solves the technical problems of difficulty in recording and tracing the press-fitting information of the main housing and difficulty in quality control during the production process.

[0005] According to an embodiment of the present invention, a press-fitting method for an engine main housing is provided, the press-fitting method comprising: The main housing is placed on the first pressing device, and the initial information parameters of the information carrier attached to the main housing are obtained. The product type and the corresponding assembly process information of the initial information parameters are matched. Based on the assembly process information, at least one type of pressing mechanism is controlled to install a type of assembly at multiple assembly positions on the main housing. The type of pressing mechanism and the assembly position are installed by floating self-centering. The information carrier is iteratively output to the first information parameters, which include the pressing type, time parameters and assembly parameters of the type of assembly. The main housing processed by the first pressing equipment is installed on the second pressing equipment. The first information parameters of the information carrier and the assembly process information matching the second pressing equipment are obtained. Based on the assembly process information, the second pressing mechanism is controlled to install the second type of assembly parts at multiple assembly positions on the main housing. The information carrier iteratively outputs the second information parameters, which include the pressing type, time parameters and assembly parameters of the second type of assembly parts. The main housing processed by the second press fitting equipment is installed in the curing position. Sealing rings and plugs are installed on the main housing. Some Class I and Class II assemblies are connected to the main housing with adhesive. The adhesive is cured for a preset time. The main housing is installed on the airtightness testing device to obtain the second information parameters of the information carrier and perform a pre-verification of the airtightness test. After the verification is qualified, the sealing mechanism is controlled to seal and press the main housing, and the pneumatic mechanism is controlled to introduce compressed gas at a preset pressure into the detection channel of the main housing to perform constant pressure holding test, and the pressure test information is iteratively input into the information carrier.

[0006] In one embodiment, controlling at least one type of press-fitting mechanism to install a type of assembly at multiple assembly positions on the main housing based on the assembly process information includes: Determine the pressing type and control the pressing mechanism to grab the corresponding type of assembly; The position coordinates of the corresponding assembly hole are obtained from the assembly process information. The spatial coordinate information of the assembly hole is corrected based on the displacement information of the pallet mechanism of the main shell. Based on the corrected spatial coordinate information, the pressing mechanism is controlled to move and align to the center line of the assembly hole. The pressing mechanism is controlled to move and press a type of assembly into the assembly hole; wherein the pressing mechanism is equipped with a floating pressing head module, and the floating pressing head module drives the type of assembly to float and press. Obtain and correlate the press-fit pressure and displacement curves of the aforementioned type of assembly.

[0007] In one embodiment, the pressing mechanism includes a displacement sensor, a pressing power component, a pressure sensor, a floating pressing head module, and a pressing shaft installed in sequence. When the floating pressing head module is subjected to a lateral guiding force, it drives the pressing shaft to shift laterally and / or rotate. The pressing shaft is provided with a mounting part for fixing a type of assembly. The displacement sensor detects the displacement of the pressing shaft.

[0008] In one embodiment, the first pressing device includes a feeding mechanism, the pressing mechanism includes a side pressing mechanism and a top pressing mechanism, and the feeding mechanism is located at the intersection of the side pressing mechanism and the top pressing mechanism; The side pressing mechanism adjusts the height of the pressing mechanism to match the height of the side assembly hole on the main housing, and adjusts the corresponding pressing depth by horizontal extension and retraction. The top pressing mechanism adjusts the pressing depth of the pressing mechanism to match the pressing depth of the side assembly hole on the main housing.

[0009] In one embodiment, the first pressing device further includes a glue-spinning mechanism; Based on the assembly process information, the glue-spinning mechanism is controlled to align with the center line of the assembly hole; The glue-dispensing end of the control glue-spinning mechanism is inserted into the assembly hole to a first depth, and moves back and forth along the axis for a preset distance with the first depth as the center, and the glue is applied to the hole wall of the assembly hole during the movement.

[0010] In one embodiment, the step of obtaining the second information parameters of the information carrier and performing pre-verification for airtightness detection includes: Obtain the adhesive type for Class I and Class II assemblies, as well as the matching timestamp information and standard curing time; Based on timestamp information, determine whether all Class I and Class II assemblies have reached the standard curing time corresponding to the adhesive. An alarm will be issued if part of the adhesive cures for less than the standard curing time. When the total adhesive time is greater than or equal to the standard curing time, an airtightness test is performed.

[0011] In one embodiment, mounting the main housing to the airtightness testing device includes: The bottom sealing ring is installed on the test base, and the bottom sealing ring is adapted to the irregular curved shape inside the main housing. Multiple annular sealing rings are installed on the bottom and sides of the main housing; The main housing is pressed onto the test base and sealed with the bottom sealing ring. The positioning pin of the test base is inserted into the main housing for positioning. The oil and water nozzle assemblies of the test base are respectively inserted into and sealed with the main housing. Determine whether the detection sensor outputs an electrical signal; if the detection sensor outputs an electrical signal, the device is installed correctly.

[0012] In one embodiment, the control pressure mechanism introduces compressed gas at a preset pressure into the detection channel of the main housing to perform constant pressure holding detection, and iteratively inputs the pressure test information into the information carrier, including: The control oil circuit nozzle assembly injects gas at the first pressure value; Pressure is released after a preset pressure holding time. Control the gas nozzle assembly in the water circuit to inject gas at the second pressure value; Pressure is released after a preset pressure holding time. Repeat the above steps at least twice, and use the pressure detection component to detect the pressure value of the channel. If the pressure value is kept within the preset pressure range, the assembly of the main housing is qualified.

[0013] In one embodiment, the control and sealing mechanism for actively sealing and pressing the main housing includes: Drive the test base to move to the airtightness test position; The pressure assembly is pressed onto the top surface of the main housing; The control side pressure plate assembly is pressed against one side of the main housing, and the control plug assembly is pressed against the other side of the main housing to maintain the balance of the two sides of the main housing; The camera control system captures images of the press-fit seam where the side pressure plate assembly and the main housing are press-fitted together. Determine the shape of the seam and the fit clearance in the crimped seam image. If the fit clearance is less than or equal to the preset value, the crimping of the main housing and the side pressure plate assembly meets the preset requirements.

[0014] In one embodiment, the method of controlling the type II press-fitting mechanism to install type II assemblies at multiple assembly positions on the main housing based on the assembly process information further includes: Display a manual prompt signal on the screen; The installation positions of the three types of components of the main housing are displayed sequentially on the screen; Collect the riveting parameters of the manual riveting tool and input the control signal indicating that the manual installation of the three types of assemblies is complete.

[0015] The technical solutions provided by the embodiments of the present invention can include the following beneficial effects: The main housing is sequentially installed with corresponding components on a first pressing device and a second pressing device. The time parameters and assembly parameters of each component are matched with the generated pressing information, and timestamp information is recorded synchronously, facilitating traceability and verification of subsequent processes. One type of pressing mechanism can align with the assembly hole according to the assembly process information. Furthermore, this type of pressing mechanism and assembly position can achieve floating self-centering installation, realizing both electrical and physical dual positioning pressing, resulting in high pressing reliability. Pre-verification is performed before the airtightness testing device, thereby ensuring that all components meet the curing requirements of the adhesive. A complete traceability information chain is formed in the production process, reducing production and after-sales risks. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] Figure 1 This is a flowchart illustrating a press-fitting process according to one embodiment.

[0018] Figure 2 This is a schematic diagram illustrating a type of pressing mechanism and a glue-spinning mechanism according to one embodiment.

[0019] Figure 3 This is a schematic diagram illustrating an airtightness detection device according to one embodiment.

[0020] Figure 4 This is a schematic diagram of a detection base according to one embodiment.

[0021] In the figure, there is a type of pressing mechanism 10; a pressing power component 11; a pressure sensor 12; a floating pressure head module 13; a pressing shaft 14; a glue-spinning mechanism 20; a circumferential glue outlet 21; an airtightness detection device 30; a detection base 31; a mounting groove 311; an oil circuit air nozzle assembly 312; a water circuit air nozzle assembly 313; a detection sensor 314; a top pressure assembly 32; a side pressure plate assembly 33; a pushing component 331; a sealing plate 332; a secondary sealing component 333; and a plug assembly 34. Detailed Implementation

[0022] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images, and should not be construed as limiting the invention. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art.

[0023] like Figures 1 to 3 As shown, this invention provides a press-fitting method for an engine main housing. This press-fitting method is applied to a main housing production line, wherein the production line is equipped with a first press-fitting device, a second press-fitting device, a manual riveting tool, and an airtightness testing device 30. The manual riveting tool and the second press-fitting device are communicatively connected, thereby allowing the control system to collect the riveting force parameters and time parameters corresponding to the manual riveting tool. Assemblies are press-fitted onto the main housing, and the assemblies include Class I assemblies and Class II assemblies. The press-fitting mechanism includes a Class I press-fitting mechanism for pressing Class I assemblies and a Class II press-fitting mechanism for pressing Class II assemblies.

[0024] Press fitting methods include: S101, the main housing is placed on the first pressing device, the initial information parameters of the information carrier attached to the main housing are obtained, and the product type and the corresponding assembly process information corresponding to the initial information parameters are matched; based on the assembly process information, at least one type of pressing mechanism 10 is controlled to install a type of assembly at multiple assembly positions on the main housing, and the type of pressing mechanism 10 and the assembly position are installed by floating self-centering; the information carrier is iteratively output as first information parameters, the first information parameters including the pressing type, time parameters and assembly parameters of the type of assembly.

[0025] The first pressing device is equipped with a pallet mechanism, which can support and move the main housing. Optionally, the pallet mechanism is driven by a ball screw mechanism to cooperate with the control system to control the movement stroke of the main housing. The first pressing device is equipped with a scanner or card reader to acquire the initial information parameters attached to the main housing. The initial information parameters include the type of the main housing, the position of the assembly hole to be assembled, and the type of assembly part information corresponding to the assembly hole.

[0026] Optionally, the assembly position has assembly holes. The first press-fitting equipment corresponds to the press-fitting of a type of assembly including cup-shaped plugs and tubing heads. The assembly process information includes the installation position requirements, installation depth requirements, adhesive application range requirements, installation pressure requirements, and installation sequence of each assembly hole for the cup-shaped plug; and the installation depth requirements, installation pressure requirements, installation coordinates, and installation sequence of each assembly hole for the tubing head.

[0027] The control system controls a type of pressing mechanism 10 to perform pressing operations one by one based on assembly process information. This type of pressing mechanism 10 employs a floating pressing structure to achieve floating self-centering installation of the assembly parts and assembly holes. Specifically, the floating self-centering installation involves a floating pressing head module 13 within the pressing mechanism 10. The floating pressing head module 13 is initially centered and coaxially positioned. Furthermore, the moving parts of the floating pressing head module 13 can perform circumferential translation and oscillation within a preset angle range relative to the fixed part, thereby achieving floating installation. The floating pressing head module 13 is existing technology and will not be described in detail here. The type of pressing mechanism 10 and the assembly position can achieve floating self-centering installation, realizing both electrical and physical dual positioning pressing, resulting in high pressing reliability.

[0028] After the first pressing equipment completes all the pressing steps of the first type of assembly, the control system generates the first information parameters and matches and iterates with the information carrier, so that the information carrier contains the first information parameters.

[0029] S102, the main housing processed by the first pressing equipment is installed on the second pressing equipment, the first information parameters of the information carrier and the assembly process information matching the second pressing equipment are obtained, and the second pressing mechanism is controlled to install the second type of assembly parts at multiple assembly positions on the main housing based on the assembly process information; the information carrier iteratively outputs the second information parameters, which include the pressing type, time parameters and assembly parameters of the second type of assembly parts.

[0030] The second pressing equipment is similar in structure and function to the first pressing equipment and can be understood by referring to it, so it will not be described again here. The difference is that the second type of assembly includes a water outlet pipe and a stretch plug. After the main shell is rotated, it is installed into the second pressing equipment. The second pressing equipment performs the corresponding pressing of the second type of assembly according to the assembly process information. After the second pressing equipment completes all the pressing steps of the second type of assembly, the control system generates second information parameters and matches and iterates with the information carrier, so that the information carrier contains the second information parameters.

[0031] The information carrier is matched and bound to the main shell, and can be produced along with the main shell on different equipment on the production line. The control system can obtain corresponding continuous, controllable and traceable information based on the information carrier.

[0032] S103, after the second pressing equipment completes the pressing, the main housing can be placed in the curing space for the curing of the adhesive and as a preparatory operation for the sealing test of the main housing. Specifically, the main housing processed by the second pressing equipment is installed in the curing position, and a sealing ring and a plug are installed on the main housing. The sealing ring surrounds the opening of the channel that needs to be sealed, and the plugs are placed at the branch openings of the oil passage and the water passage, thus ensuring that the oil passage and the water passage have only one opening.

[0033] Some Class I and Class II fittings are connected to the main housing using adhesive, with the adhesive curing at a preset time. For example, the sidewall of the cup-shaped plug is connected to the wall of the mounting hole using adhesive. Alternatively, the water outlet pipe is inserted into the corresponding mounting hole, and both the mounting hole and the water outlet pipe are coated with adhesive, resulting in a complete bond between the water outlet pipe and the mounting hole. The adhesive fully cures in 22 to 24 hours to achieve the preset bond strength.

[0034] S104, the main housing is installed onto the airtightness testing device 30, the second information parameters of the information carrier are acquired, and a pre-verification of the airtightness test is performed. After the verification is passed, the sealing mechanism is controlled to seal and tighten the main housing, and the pneumatic mechanism is controlled to introduce compressed gas at a preset pressure into the testing channel of the main housing to perform constant pressure holding test, and the pressure test information is iteratively input into the information carrier.

[0035] The control system uses pre-verification to determine whether the main housing has completed the pre-installation of all components, and uses the corresponding timestamp information of the components to determine whether the adhesive meets the curing time requirements, avoiding the drawback of insufficient curing time leading to insufficient bonding strength. The control system can determine the pressing information of each main housing based on the information carrier, realizing traceability of each process and time, reducing the risk of uncontrollable testing sequence due to mixed assembly of different main housings, and the risk of constant pressure testing damaging the adhesive.

[0036] The main housing is sequentially fitted with corresponding components using the first and second pressing equipment. The time and assembly parameters of each component are matched with the generated pressing information, and timestamp information is recorded synchronously for easy traceability and verification in subsequent processes. A pre-verification is performed before the airtightness testing device 30 is used to ensure that all components meet the curing requirements of the adhesive. This creates a complete traceability information chain in the production process, reducing production and after-sales risks.

[0037] In the above press-fitting method, controlling at least one type of press-fitting mechanism 10 to install a type of assembly at multiple assembly positions on the main housing based on assembly process information includes the following steps: S201, determine the pressing type and control the pressing mechanism to grasp the corresponding type of assembly. The pressing mechanism has corresponding fixing structures based on different types of assemblies. The fixing structures can fix the type of assembly and perform axial telescopic pressing under the drive of the pressing mechanism. For example, the fixing structure includes a protruding shaft-shaped protrusion, with a cup-shaped plug fitted onto the shaft-shaped protrusion. Preferably, one pressing mechanism can press multiple assemblies in different positions to improve pressing efficiency and achieve multi-mechanism linkage in space.

[0038] S202: Obtain the position coordinates of the corresponding assembly hole from the assembly process information. Correct the spatial coordinate information of the assembly hole based on the displacement information of the pallet mechanism of the main housing. Control the pressing mechanism to move and align to the center line of the assembly hole based on the corrected spatial coordinate information. The control system obtains the initial information parameters attached to the information carrier and, based on the multi-point pressing requirements of the pressing mechanism, wherein the pressing mechanism moves within the longitudinal plane range to perform pressing positioning of assembly holes at different heights. Preferably, the control system controls the pallet mechanism to link together, thereby forming a multi-dimensional linkage pressing in three-dimensional space, further improving the flexibility of pressing.

[0039] The assembly process information includes the assembly requirements and assembly coordinate information for each assembly hole. When the pressing mechanism completes the pressing of a type of assembly part, the control system marks the completion of the pressing of the assembly hole and records the corresponding timestamp information.

[0040] S203, control the pressing mechanism to move and press a type of assembly into the assembly hole; wherein, the pressing mechanism is equipped with a floating pressing head module 13, which drives the type of assembly to float and press. The control system controls the pressing mechanism to move to the corresponding assembly hole position based on the built-in program to achieve program alignment. The floating pressing head module 13 on the pressing mechanism can realize fine-tuning of translation of a type of assembly within the circumferential plane; and / or, the floating pressing head module 13 can realize tilt adjustment of the pressing angle within a preset angle range, thereby realizing physical adaptive adjustment. Therefore, the pressing mechanism, through program coarse adjustment combined with the adaptive adjustment of the floating pressing head module 13, maintains the pressing of a type of assembly in accordance with design requirements. For example, the pressing depth of the cup-shaped plug at the opening of the assembly hole is 2mm-3mm, and the deflection after pressing is ≤0.3mm.

[0041] S204: Acquire and correlate the pressing pressure and displacement curves of a type of assembly. The control system collects pressing pressure and displacement data during the pressing process. If the pressing pressure is within a preset range, the changes in the pressing pressure curve are recorded. If the pressing pressure exceeds the preset range, pressing is stopped and an alarm is output to prevent damage to the pressing mechanism and instability of the main housing. If the pressing pressure is below the preset range, pressing is stopped and an alarm is output to prevent misassembly or omissions.

[0042] The pressing mechanism includes a displacement sensor, a pressing power component 11, a pressure sensor 12, a floating pressure head module 13, and a pressing shaft 14, all installed sequentially. When the floating pressure head module 13 is subjected to a lateral guiding force, it drives the pressing shaft 14 to shift laterally and / or rotate. The pressing shaft 14 has a mounting part for fixing a type of assembly. The displacement sensor detects the displacement of the pressing shaft 14. The displacement sensor detects the displacement of the pressing shaft 14 and sends the corresponding displacement electrical signal to the control system. Simultaneously, the pressure sensor 12 outputs a corresponding pressure electrical signal. The pressure electrical signal and the displacement electrical signal are correlated and matched to output a pressing pressure versus displacement curve.

[0043] The floating pressure head module 13 maintains axial pushing when a type of assembly is coaxial with the assembly hole. When there is a deviation between the type of assembly and the assembly hole, the floating pressure head module 13 can automatically align under the action of the lateral guiding force between the type of assembly and the assembly hole, thereby forming a coaxial pressing connection with good pressing effect. The control system can collect signals from the displacement sensor and pressure sensor 12 in real time and generate traceable timestamp information, thus forming a fully controllable process.

[0044] Furthermore, the first pressing device includes a feeding mechanism, and the pressing mechanism includes a side pressing mechanism and a top pressing mechanism, with the feeding mechanism located at the intersection of the side pressing mechanism and the top pressing mechanism. The side pressing mechanism is used to press a type of assembly for the side assembly holes of the main housing, and the top pressing mechanism is used to press a type of assembly for the top assembly holes of the main housing. The feeding mechanism provides a type of assembly to the side pressing mechanism and the top pressing mechanism based on the control signal of the control system.

[0045] The side pressing mechanism adjusts the height of the pressing mechanism to match the side assembly hole on the main housing, and the lateral extension and retraction adjusts the corresponding pressing depth. The top pressing mechanism adjusts the pressing depth of the pressing mechanism to match the side assembly hole on the main housing.

[0046] The side pressing mechanism includes a ball screw mechanism for lifting and lowering, and the pressing mechanism is fixed to the nut portion of the ball screw mechanism via a mounting plate. The pressing mechanism's telescopic movement enables guided pressing. Correspondingly, the pressing power component 11 of the top pressing mechanism drives the telescopic pressing of the top assembly. Preferably, the top pressing mechanism is mounted on a lateral moving mechanism, which drives the top pressing mechanism to translate, thereby dynamically gripping the assembly from the feeding mechanism.

[0047] In one embodiment, the first pressing device further includes a glue-spinning mechanism 20, which is used to output adhesive by centrifugal spinning, thereby achieving contactless adhesive application. The control system controls one glue-spinning mechanism 20 to apply adhesive to multiple assembly holes. Controlling the glue-spinning mechanism 20 by the control system includes the following steps: Based on the assembly process information, the glue-spinning mechanism 20 is aligned with the center line of the assembly hole; The glue-dispensing end of the glue-spinning mechanism 20 is controlled to penetrate into the assembly hole to a first depth, and moves back and forth along the axis for a preset distance with the first depth as the center, and the glue is applied to the hole wall of the assembly hole during the movement.

[0048] The assembly process information includes the spatial coordinates of the assembly holes. The control system adjusts the lateral and longitudinal movement components of the glue-spinning mechanism 20 to align the glue-spinning gun of the glue-spinning mechanism 20 with the axis of the assembly holes. The output part of the glue-spinning gun has multiple circumferential glue outlets 21. When the output part of the glue-spinning gun rotates, the circumferential glue outlets 21 output adhesive towards the wall of the assembly hole.

[0049] The control system moves the glue gun to align the circumferential glue outlet 21 with the center of the adhesive application area. The control system also rotates the glue gun to centrifugally release the adhesive from the circumferential glue outlet 21 and apply it to the assembly hole. Furthermore, the glue gun reciprocates along the axial direction of the assembly hole to ensure uniform distribution of the adhesive along the axial direction of the hole, thereby achieving a uniform connection between the assembly and the adhesive, resulting in a good bonding effect.

[0050] The pressing principle of the second pressing equipment is similar to that of the first pressing equipment. The difference lies in the gripping method of the first and second types of assemblies, which is adjusted according to the product type. For example, the groove of the cup-shaped plug is engaged with the end of the pressing shaft 14 to form a coaxial assembly. The small end of the water outlet pipe is inserted into the end of the pressing shaft 14 to form a plug-in positioning fit.

[0051] Furthermore, the second pressing equipment location also includes manual installation of Class III assemblies using manual riveting tools, thereby further improving installation efficiency. The control system, based on assembly process information, controls the Class II pressing mechanism to install Class II assemblies at multiple assembly positions on the main housing, and includes the following steps: Display a manual prompt signal on the screen; The installation positions of the three types of components of the main housing are displayed sequentially on the screen; Collect the riveting parameters of the manual riveting tool and input the control signal indicating that the manual installation of the three types of assemblies is complete.

[0052] The display screen is located at the front of the second pressing device and can display the corresponding pressing position of the main housing. Preferably, the display screen flashes the corresponding pressing position to prompt the operator to perform the corresponding operation according to the display screen.

[0053] The control system collects the electrical signals of the manual riveting tool and marks the corresponding pressing position to complete the installation of three types of assemblies. At the same time, it matches the timestamp information with the pressing position and generates traceable timestamp information, thus making the whole process controllable.

[0054] Preferably, the manual riveting tool is connected to the second pressing device via a cable, and the manual riveting tool forms part of the second pressing device. Optionally, the manual riveting tool is set up independently and communicates with the control system via a wireless module to form a wireless transmission.

[0055] After the installation of the three types of components is completed, the main housing is fixed in place.

[0056] The control system acquires the second information parameter of the information carrier and performs a pre-verification of the airtightness test, including the following steps: Obtain the adhesive type for Class I and Class II assemblies, as well as the matching timestamp information and standard curing time; Based on timestamp information, determine whether all Class I and Class II assemblies have reached the standard curing time corresponding to the adhesive. An alarm will be issued if part of the adhesive cures for less than the standard curing time. When the total adhesive time is greater than or equal to the standard curing time, an airtightness test is performed.

[0057] When the adhesive type of a type 1 assembly is the same as that of a type 2 assembly, the control system obtains the timestamp information of the last installed type 2 assembly and determines whether the time interval of the type 2 assembly meets the standard curing time based on the timestamp information.

[0058] When the adhesive type for Class I assemblies differs from that for Class II assemblies, the required standard curing time for the corresponding adhesive is obtained. The timestamp information for the last installed Class I and Class II assemblies is also retrieved. Based on the timestamp information, it is determined whether the time interval between adhesive installations meets the corresponding standard curing time. If the standard curing time is met, the pre-verification is successful. If the standard curing time is partially not met, the pre-verification fails, an alarm is output, and the airtightness test cannot be performed.

[0059] like Figure 1 , Figure 3 and Figure 4 As shown, after the pre-verification is passed, the main housing is installed onto the airtightness testing device 30. The airtightness testing device 30 performs an airtightness test on the main housing, including the following steps: The bottom sealing ring is installed on the test base 31, and the bottom sealing ring is adapted to the irregular curved shape inside the main housing. Multiple annular sealing rings are installed on the bottom and sides of the main housing; The main housing is pressed onto the test base 31 and sealed with the bottom sealing ring. The positioning post of the test base 31 is inserted into the main housing for positioning. The oil circuit air nozzle assembly 312 and the water circuit air nozzle assembly 313 of the test base 31 are respectively inserted into and sealed with the main housing. Determine whether the detection sensor 314 outputs an electrical signal. When the detection sensor 314 outputs an electrical signal, the device is installed in place.

[0060] The bottom sealing ring is an annular rectangular wall-shaped sealing structure. A mounting groove 311 is recessed into the surface of the detection base 31, and the bottom sealing ring is embedded in the mounting groove 311, extending beyond the upper surface of the detection base 31. When the main housing is pressed against the detection base 31, the bottom sealing ring is embedded in the large opening of the main housing, and a compression seal is formed between the bottom sealing ring and the irregular curved surface of the main housing, resulting in a good sealing effect.

[0061] Furthermore, a small channel opening is provided within the large opening area of ​​the main housing, and an annular sealing ring is installed at the small channel opening. When the main housing is pressed against the detection base 31, the annular sealing ring and the detection base 31 are squeezed and sealed. Preferably, part of the annular sealing ring is installed on the side of the main housing, and the sealing mechanism is movable and seals the side of the main housing by squeezing and sealing with the annular sealing ring. More preferably, the sealing mechanism includes a columnar plug, on which the sealing ring is fitted. The columnar plug is inserted into the side hole of the main housing, and the sealing ring squeezes and seals with the side hole, thus forming support and sealing.

[0062] The detection sensor 314 includes two spaced apart. When the two detection sensors 314 detect and output electrical signals synchronously, the control system determines that the pressing is in place.

[0063] Furthermore, controlling the sealing mechanism to seal and press the main housing includes the following steps: Drive the test base 31 to move to the airtightness test position; The control top pressing assembly 32 is pressed onto the top surface of the main housing; The control side pressure plate assembly 33 is pressed onto one side of the main housing, and the control plug assembly 34 is pressed onto the other side of the main housing to maintain the balance of the two sides of the main housing; The camera control system captures images of the press-fit seam where the side pressure plate assembly 33 and the main housing are press-fitted together. Determine the shape of the seam and the fitting clearance in the crimped seam image. If the fitting clearance is less than or equal to the preset value, the crimping of the main housing and the side pressure plate assembly 33 meets the preset requirements.

[0064] The top pressure assembly 32 presses against the top surface of the main housing from top to bottom, thereby forming a top pressure on the main housing, which in turn presses the bottom of the main housing tightly against the detection base 31, and the bottom sealing ring and the main housing are tightly sealed. Further, the side pressure plate assembly 33 includes a pusher 331, a sealing plate 332 connected to the pusher 331, and a secondary sealing member 333 installed on the sealing plate 332. The sealing plate 332 abuts against the large lateral opening of the main housing to form a lateral pressure seal. The secondary sealing member 333 can be a lateral pressure telescopic member to seal the lateral countersunk hole.

[0065] The plug assembly 34 and the side pressure plate assembly 33 are arranged opposite to each other, supporting each other on both sides of the main housing, and can achieve a seal at the joint. The plug assembly 34 and the side pressure plate assembly 33 can offset part of the interaction force, thereby maintaining the stability of the crimping position and avoiding the occurrence of bias force.

[0066] The oil-line air nozzle assembly 312 and the water-line air nozzle assembly 313 can achieve stable pressure. The control system controls the pneumatic mechanism to introduce compressed gas at a preset pressure into the detection channel of the main housing, performs constant pressure holding detection, and iteratively inputs the pressure test information into the information carrier, including the following pressurization steps: The control oil circuit nozzle assembly 312 injects gas at the first pressure value; Pressure is released after a preset pressure holding time. The water-channel air nozzle assembly 313 controls the injection of gas at the second pressure value; Pressure is released after a preset pressure holding time. Repeat the above steps at least twice, using the pressure detection component to check the pressure value of the channel. If the pressure value remains within the preset pressure range, the assembly of the main housing is considered successful. The pressure detection component can be a pressure gauge or a pressure sensor.

[0067] The control system alternately pressurizes the oil-line air nozzle assembly 312 and the water-line air nozzle assembly 313, performing alternating detection of different channels. This enables fluctuating pressurization detection, simulating the impact of fluid shock pressure on various components, and combining dynamic sealing detection with constant pressure static detection, thereby improving the comprehensiveness of the detection. The first and second pressure values ​​can be the same or adaptively adjusted according to simulation requirements. Furthermore, the control system records the pressure values ​​of the corresponding channels and associates them with an information carrier, thus forming traceable detection data.

[0068] It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed in this invention.

Claims

1. A method for press-fitting an engine main housing, characterized in that, The press-fitting process includes: The main housing is placed on the first pressing device, and the initial information parameters of the information carrier attached to the main housing are obtained. The product type and the corresponding assembly process information of the initial information parameters are matched. Based on the assembly process information, at least one type of pressing mechanism is controlled to install a type of assembly at multiple assembly positions on the main housing. The type of pressing mechanism and the assembly position are installed by floating self-centering. The information carrier is iteratively output to the first information parameters, which include the pressing type, time parameters and assembly parameters of the type of assembly. The main housing processed by the first pressing equipment is installed on the second pressing equipment. The first information parameters of the information carrier and the assembly process information matching the second pressing equipment are obtained. Based on the assembly process information, the second pressing mechanism is controlled to install the second type of assembly parts at multiple assembly positions on the main housing. The information carrier iteratively outputs the second information parameters, which include the pressing type, time parameters and assembly parameters of the second type of assembly parts. The main housing processed by the second press fitting equipment is installed in the curing position. Sealing rings and plugs are installed on the main housing. Some Class I and Class II assemblies are connected to the main housing with adhesive. The adhesive is cured for a preset time. The main housing is installed on the airtightness testing device to obtain the second information parameters of the information carrier and perform a pre-verification of the airtightness test. After the verification is qualified, the sealing mechanism is controlled to seal and press the main housing, and the pneumatic mechanism is controlled to introduce compressed gas at a preset pressure into the detection channel of the main housing to perform constant pressure holding test, and the pressure test information is iteratively input into the information carrier.

2. The press-fitting method according to claim 1, characterized in that, The method of controlling at least one type of press-fitting mechanism to install a type of assembly at multiple assembly positions on the main housing based on the assembly process information includes: Determine the pressing type and control the pressing mechanism to grab the corresponding type of assembly; The position coordinates of the corresponding assembly hole are obtained from the assembly process information. The spatial coordinate information of the assembly hole is corrected based on the displacement information of the pallet mechanism of the main shell. Based on the corrected spatial coordinate information, the pressing mechanism is controlled to move and align to the center line of the assembly hole. The pressing mechanism is controlled to move and press a type of assembly into the assembly hole; wherein the pressing mechanism is equipped with a floating pressing head module, and the floating pressing head module drives the type of assembly to float and press. Obtain and correlate the press-fit pressure and displacement curves of the aforementioned type of assembly.

3. The press-fitting method according to claim 1 or 2, characterized in that, The pressing mechanism includes a displacement sensor, a pressing power component, a pressure sensor, a floating pressure head module, and a pressing shaft installed in sequence. When the floating pressure head module is subjected to a lateral guiding force, it drives the pressing shaft to shift laterally and / or rotate. The pressing shaft is provided with a mounting part for fixing a type of assembly. The displacement sensor detects the displacement of the pressing shaft.

4. The press-fitting method according to claim 3, characterized in that, The first pressing device includes a feeding mechanism, the pressing mechanism includes a side pressing mechanism and a top pressing mechanism, and the feeding mechanism is located at the intersection of the side pressing mechanism and the top pressing mechanism; The side pressing mechanism adjusts the height of the pressing mechanism to match the height of the side assembly hole on the main housing, and adjusts the corresponding pressing depth by horizontal extension and retraction. The top pressing mechanism adjusts the pressing depth of the pressing mechanism to match the pressing depth of the side assembly hole on the main housing.

5. The press-fitting method according to claim 4, characterized in that, The first pressing equipment also includes a glue-spinning mechanism; Based on the assembly process information, the glue-spinning mechanism is controlled to align with the center line of the assembly hole; The glue-dispensing end of the control glue-spinning mechanism is inserted into the assembly hole to a first depth, and moves back and forth along the axis for a preset distance with the first depth as the center, and the glue is applied to the hole wall of the assembly hole during the movement.

6. The press-fitting method according to claim 1, characterized in that, The acquisition of the second information parameters of the information carrier, and the pre-verification of the airtightness test, include: Obtain the adhesive type for Class I and Class II assemblies, as well as the matching timestamp information and standard curing time; Based on timestamp information, determine whether all Class I and Class II assemblies have reached the standard curing time corresponding to the adhesive. An alarm will be issued if part of the adhesive cures for less than the standard curing time. When the total adhesive time is greater than or equal to the standard curing time, an airtightness test is performed.

7. The press-fitting method according to claim 1, characterized in that, The process of installing the main housing onto the airtightness testing device includes: The bottom sealing ring is installed on the test base, and the bottom sealing ring is adapted to the irregular curved shape inside the main housing. Multiple annular sealing rings are installed on the bottom and sides of the main housing; The main housing is pressed onto the test base and sealed with the bottom sealing ring. The positioning pin of the test base is inserted into the main housing for positioning. The oil and water nozzle assemblies of the test base are respectively inserted into and sealed with the main housing. Determine whether the detection sensor outputs an electrical signal; if the detection sensor outputs an electrical signal, the device is installed correctly.

8. The press-fitting method according to claim 7, characterized in that, The pressure control mechanism introduces compressed gas at a preset pressure into the detection channel of the main housing to perform constant pressure holding detection, and iteratively inputs the pressure test information into the information carrier, including: The control oil circuit nozzle assembly injects gas at the first pressure value; Pressure is released after a preset pressure holding time. Control the gas nozzle assembly in the water circuit to inject gas at the second pressure value; Pressure is released after a preset pressure holding time. Repeat the above steps at least twice, and use the pressure detection component to detect the pressure value of the channel. If the pressure value is kept within the preset pressure range, the assembly of the main housing is qualified.

9. The press-fitting method according to claim 1, characterized in that, The control and sealing mechanism for actively sealing and pressing the main housing includes: Drive the test base to move to the airtightness test position; The pressure assembly is pressed onto the top surface of the main housing; The control side pressure plate assembly is pressed against one side of the main housing, and the control plug assembly is pressed against the other side of the main housing to maintain the balance of the two sides of the main housing; The camera control system captures images of the press-fit seam where the side pressure plate assembly and the main housing are press-fitted together. Determine the shape of the seam and the fit clearance in the crimped seam image. If the fit clearance is less than or equal to the preset value, the crimping of the main housing and the side pressure plate assembly meets the preset requirements.

10. The press-fitting method according to claim 1, characterized in that, The method of controlling the type II press-fitting mechanism based on the assembly process information to install type II assembly parts at multiple assembly positions on the main housing also includes: Display a manual prompt signal on the screen; The installation positions of the three types of components of the main housing are displayed sequentially on the screen; Collect the riveting parameters of the manual riveting tool and input the control signal indicating that the manual installation of the three types of assemblies is complete.

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