A press control method and detection device for cv axis back-tension detection

Abstract

The application discloses a press control method and detection device for CV shaft reverse pull detection, wherein the press control method for CV shaft reverse pull detection comprises a process of acquiring each process parameter calling unit during execution of a home position returning action; and based on each process parameter calling unit, corresponding programs are executed in sequence under acquisition of an execution trigger instruction. In the embodiment of the application, control information of the press is written during the process of returning the press to the home position, so that the control data writing and reading time of the press during execution of the detection action is eliminated, the reverse pull detection efficiency of the CV shaft is improved, the processes of spline matching, primary pressing, reverse pulling and secondary pressing are included in the reverse pull detection process of the CV shaft, the assembly of the real shaft and the fixed section in the CV shaft and the reverse pull detection between the real shaft and the fixed section are simultaneously realized, the installation accuracy of the CV shaft is ensured, the assembly and detection cycle of the CV shaft is shortened, and after detection, the influence of the detection process on the overall assembly strength of the CV shaft can be eliminated, so that the stability is stronger.

Description

Technical Field

[0001] This invention relates to the field of automotive parts manufacturing technology, and in particular to a press control method and testing device for CV shaft back tension testing. Background Technology

[0002] The CV shaft, also known as a half shaft or drive axle, is a solid shaft that transmits torque between the differential and the drive wheels. Its inner end is generally connected to the half shaft gear via a spline, and its outer end is connected to the wheel hub. Modern automobiles commonly use two types of CV shafts, which are fully floating and semi floating, depending on their support form. The fully floating CV shaft only transmits torque and does not bear any reaction force or bending moment, so it is widely used in various types of automobiles.

[0003] Based on the market demand for automobile production, the CV shaft, as an important component of automobiles, has a significant impact on the overall production efficiency and quality of automobiles due to its manufacturing speed and quality. In order to ensure the assembly strength of automobile CV shafts, it is necessary to perform a reverse tension test on the fixed section and the solid shaft during its processing. That is, a press is used to apply a reverse force to the fixed section and the solid shaft to check whether the fixed section and the solid shaft are fixed in place. In the existing technology, the corresponding action parameters are written before the press performs each test action. Since the reverse tension test involves multiple test actions, and the writing of action parameters takes up test time, the cycle time of the entire test process is too long, which in turn affects the overall assembly efficiency of the CV shaft. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a press control method and detection device with high detection efficiency for CV shaft back tension detection.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions.

[0006] This application provides a press control method for CV shaft back tension testing, including:

[0007] During the execution of the return-to-origin action, the program number for releasing the solid shaft, the spline parameter call unit, the first press-in parameter call unit, the pull-back parameter call unit, and the second press-in parameter call unit are obtained;

[0008] Upon receiving the execution trigger command, the solid shaft program, spline program, first press-in program, second press-in program, and third press-in program are executed sequentially based on the solid shaft program number, spline parameter call unit, first press-in parameter call unit, second press-in parameter call unit, and third press-in parameter call unit.

[0009] Further specifying, the press control method for CV-axis back-pull detection described above, wherein, before executing the homing action, it further includes:

[0010] The action of returning to the origin is executed under the command of obtaining the origin.

[0011] The origin trigger command includes an start signal, a stop signal, and a manual adjustment command signal.

[0012] Further specifying, in the above-mentioned press control method for CV-axis back-pull detection, the solid shaft program number includes standby position information:

[0013] Specifically, upon receiving the execution trigger command, the device moves from the origin to the standby position based on the standby position information.

[0014] Further defining the above-mentioned press control method for CV shaft back tension detection, the spline parameter calling unit includes a spline parameter storage unit and spline control information recorded in the spline parameter storage unit;

[0015] The spline control information includes spline position information, speed information, and pressure information;

[0016] Specifically, after executing the solid shaft program, the spline matching program is executed based on the spline control information in the spline parameter storage unit.

[0017] Further defining the above-mentioned press control method for CV axis back tension detection, wherein the primary press parameter calling unit includes a primary press parameter storage unit and primary press control information recorded in the primary press parameter storage unit;

[0018] The single-insertion control information includes single-insertion position information, speed information, and pressure information;

[0019] Specifically, after executing the spline matching program, a first-pressing program is executed based on the first-pressing control information in the first-pressing parameter storage unit.

[0020] Further defining the above-mentioned press control method for CV axis back tension detection, the back tension parameter calling unit includes a back tension parameter storage unit and back tension control information recorded in the back tension parameter storage unit;

[0021] The anti-pull control information includes anti-pull position information, speed information, and tension information;

[0022] Specifically, after executing the push-in procedure once, the pull-out procedure is executed based on the pull-out control information in the pull-out parameter storage unit.

[0023] Further defining the above-mentioned press control method for CV axis back tension detection, the secondary press parameter calling unit includes a secondary press parameter storage unit and secondary press control information recorded in the secondary press parameter storage unit;

[0024] The secondary pressing control information includes counter-pull position information, speed information, and pressure information;

[0025] Specifically, after the reverse pull procedure is executed, the secondary push procedure is executed based on the secondary push control information in the secondary push parameter storage unit.

[0026] Further specifying, the press control method for CV shaft back-pull detection described above includes, before executing the shaft-releasing program, spline alignment program, first press-in program, back-pull-in program, and second press-in program, the following:

[0027] Obtain the workpiece ID information;

[0028] Specifically, the corresponding program is bound to the workpiece ID information before executing the first pressing program, the reverse pulling program, and the second pressing program.

[0029] Further specifying, the press control method for CV-axis back tension detection described above also includes:

[0030] During the execution of the first pressing procedure, the reverse pulling procedure, and the second pressing procedure, monitoring data is acquired and correlated with the first pressing control information, the reverse pulling control information, and the second pressing control information to form a judgment result;

[0031] Based on the judgment result, the action of returning to the origin is executed and an alarm message is output.

[0032] This application also provides a testing device for CV shaft pull-back testing, including a main frame, on which a control press is provided, and the control press adopts the press control method for CV shaft pull-back testing described in any of the above claims;

[0033] The telescopic end of the control press is fixedly equipped with a clamping assembly for clamping the three-pin section, and the main frame is also equipped with a reverse pull limiting assembly for clamping and limiting the fixed section.

[0034] The control press can drive the solid shaft on the three-pin joint to press into the fixed joint, or drive the solid shaft on the three-pin joint to pull away from the fixed joint to one side.

[0035] This invention has at least the following beneficial effects:

[0036] 1. The control information of the press is written during the press's return to the origin, thereby eliminating the time for writing and reading control data when the press performs the testing action, which greatly improves the overall efficiency of the CV shaft back-pull test. At the same time, the CV shaft back-pull test process includes spline, first press-in, back-pull and second press-in processes, which not only ensures the installation accuracy of the CV shaft, but also eliminates the impact of the testing process on the overall assembly strength of the CV shaft after testing, resulting in stronger stability.

[0037] 2. During the press's return-to-origin action, control information for the press's first press-in, reverse pull, and second press-in is written. This simultaneously realizes the assembly of the solid shaft and the fixed section in the CV shaft, as well as the reverse pull detection between them. This not only greatly shortens the assembly and inspection cycle of the CV shaft, but also reduces the change in positioning reference between the assembly and inspection processes, making the inspection results more accurate.

[0038] 3. By binding the execution program with the workpiece ID, the parameters during the workpiece assembly and inspection process can be recorded, thereby improving the traceability of assembly and inspection data when problems occur in the workpiece later. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the specific structure of the detection device used for CV shaft pull-back detection according to an embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the specific structure of the detection device used for CV shaft pull-back detection according to an embodiment of this application;

[0041] Figure 3 This is an enlarged structural diagram of the "clamping assembly 300" in the detection device for CV shaft pull-back detection according to an embodiment of this application;

[0042] Figure 4 This is a flowchart illustrating the steps of a press control method for CV shaft back tension detection according to an embodiment of this application.

[0043] Figure Labels

[0044] Main frame-100, control press-200, clamping assembly-300, reverse pull limit assembly-400, feeding and positioning assembly-500, solid shaft-610, three-pin joint-620, fixed joint-630. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0046] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0047] The press control method and detection device for CV shaft back tension detection provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0048] This application provides a press control method for CV shaft back tension detection, such as... Figure 4 As shown, it includes:

[0049] S1. The press performs a return-to-origin action upon receiving the origin trigger command;

[0050] S2. During the press's return-to-origin operation, write the solid shaft release program number, spline parameter call unit, first press parameter call unit, reverse pull parameter call unit, and second press parameter call unit into the press.

[0051] S3. Upon receiving the execution trigger command, the press executes the full shaft program based on the pre-written full shaft program number;

[0052] S4. The press executes the spline program, the first pressing program, the reverse pulling program, and the second pressing program in sequence based on the pre-written spline parameter calling unit, the first pressing parameter calling unit, the reverse pulling parameter calling unit, and the second pressing parameter calling unit, and binds the workpiece ID information in each program.

[0053] Understandably, during the reverse tension test of the CV axis, the press, as the actuator, mainly has the following workflow:

[0054] 1. The press is installed with a solid shaft equipped with three pin joints at the predetermined position;

[0055] 2. The press drives the solid shaft to press down a predetermined stroke, while the fixed section rotates at the corresponding position, thereby realizing the spline matching action between the solid shaft and the fixed section, that is, realizing the pre-installation between the solid shaft and the fixed section;

[0056] 3. The press drives the solid shaft to press the fixed section into the predetermined stroke in one go, so that the solid shaft and the fixed section are completely locked and fixed.

[0057] 4. The press drives the solid shaft to pull back to the side away from the fixed section, thereby testing the fixing strength between the solid shaft and the fixed section. During this process, the connection status between the solid shaft and the fixed section is monitored.

[0058] 5. When the fixing strength between the solid shaft and the fixed section is qualified, in order to avoid the influence of the connection strength between the solid shaft and the fixed section during the reverse tension test, the press drives the solid shaft to press into the fixed section a second time by a predetermined stroke, thereby consolidating the connection strength between the solid shaft and the fixed section.

[0059] In order to ensure the reference positioning (standby position) when the press is installed with the real shaft, the press needs to perform a return to the origin action before the CV axis detection process. In step S1, the origin trigger command is used for the initial positioning of the press, and it is specifically set as a press start signal, a press stop signal or a manual adjustment command signal.

[0060] It is understandable that the press start signal, press stop signal, and manual adjustment command signal are all used for the press to perform the return to origin action. Their settings are not limited to the above three types. The above three signal types only represent different control paths of the press. When the press receives the press start signal, it returns to the origin position from the current state. When it receives the press stop signal, it ends the current action and returns to the origin position. When it receives the manual adjustment command signal, it pauses the current action and returns to the origin position.

[0061] In this embodiment, the press control method for CV shaft back-pull testing described above is used. The control information of the press is written during the press's return to the origin, thereby eliminating the time for writing and reading control data when the press performs the testing action, which greatly improves the overall efficiency of CV shaft back-pull testing. At the same time, the CV shaft back-pull testing process includes spline alignment, first press-in, back-pull, and second press-in, which not only ensures the installation accuracy of the CV shaft, but also eliminates the impact of the testing process on the overall assembly strength of the CV shaft after testing, resulting in stronger stability.

[0062] In a preferred embodiment, in step S2, the solid shaft placement program number is mainly used to record the standby position of the press when the solid shaft is installed. In step S3, after the press obtains the execution trigger command, it moves from the origin position to the standby position based on the standby position information in the solid shaft placement program number.

[0063] In a preferred embodiment, in step S2, the spline parameter calling unit includes a spline parameter storage unit and spline position information, speed information, and pressure information recorded in the spline parameter storage unit. In step S4, the spline program is executed on the press based on the control information recorded in the spline parameter storage unit, thereby ensuring the accuracy of spline matching between the solid shaft and the fixed section.

[0064] In a preferred embodiment, in step S2, the primary pressing parameter calling unit includes a primary pressing parameter storage unit and primary pressing position information, speed information, and pressure information recorded in the primary pressing parameter storage unit. In step S4, the press is executed with a primary pressing program based on the control information recorded in the primary pressing parameter storage unit, thereby ensuring the installation stability of the axial fixed section during primary pressing.

[0065] In a preferred embodiment, in step S2, the anti-tension parameter calling unit includes an anti-tension parameter storage unit and anti-tension position information, speed information, and tension information recorded in the anti-tension parameter storage unit. In step S4, the press is executed with an anti-tension program based on the control information recorded in the anti-tension parameter storage unit, thereby ensuring the reliability of the anti-tension detection index between the solid shaft and the fixed section.

[0066] In a preferred embodiment, in step S2, the secondary pressing parameter calling unit includes a secondary pressing parameter storage unit and secondary pressing position information, speed information, and pressure information recorded in the secondary pressing parameter storage unit. In step S4, the press is executed with a secondary pressing program based on the control information recorded in the secondary pressing parameter storage unit, thereby ensuring the overall connection strength of the axial fixed section after secondary pressing.

[0067] It is understandable that the order of writing the solid shaft program number, spline parameter calling unit, first pressing parameter calling unit, reverse pulling parameter calling unit, and second pressing parameter calling unit in the press is not restricted. The above data are all independent control information modules. In steps S3 and S4, although the calling order of the above control information modules is different, they are parallel to the press during the writing process.

[0068] In this embodiment, the press control method for CV shaft back tension detection described above is used. During the press's return-to-origin action, control information for the press's first press, back tension, and second press is written. This simultaneously realizes the assembly of the solid shaft and the fixed section in the CV shaft and the back tension detection between them. This not only greatly shortens the assembly and detection cycle of the CV shaft, but also reduces the change in positioning reference between the assembly and detection processes, making the detection results more accurate.

[0069] In a preferred embodiment, in step S4, the press sequentially calls the primary pressing parameter call unit, the reverse pulling parameter call unit, and the secondary pressing parameter call unit based on the pre-written control information to execute the corresponding action program.

[0070] Before the press executes the first pressing program, the corresponding workpiece ID information must be bound to the first pressing program. Similarly, before the press executes the reverse pulling program and the second pressing program, the corresponding program must be bound to the workpiece ID information. By binding the execution program with the workpiece ID, the parameters during the workpiece assembly and testing process can be recorded, thereby improving the traceability of assembly and testing data when problems occur in the workpiece later.

[0071] It is understandable that before step S4, the acquisition of workpiece ID information is also included. The workpiece ID information can be set to be written during the press's return-to-origin action, or it can be set to be acquired in real time based on the current workpiece. In this case, a corresponding workpiece ID information module needs to be set on the workpiece, and a workpiece ID information reading device needs to be set up. The workpiece ID information reading device can detect the ID information of the current workpiece in real time and output it to the press.

[0072] In a preferred embodiment, in step S4, if the pressure information obtained by the press during the execution of the control program does not match the pressure information recorded in the corresponding parameter calling unit, it is determined that there is a problem with the assembly strength or positioning accuracy of the solid shaft and the fixed section, and the press immediately returns to the origin and outputs an alarm signal.

[0073] For example, when the press executes the reverse tension program, if the solid shaft and the fixed section are not properly connected, the press will not receive the reaction force from the fixed section during the reverse tension process. At this time, it does not match the pressure information recorded in the reverse tension parameter calling unit. It is determined that the fixed section and the solid shaft are not properly connected and fixed. The press will return to the origin and output an alarm message to remind the staff to deal with the fault.

[0074] This application provides a detection device for CV shaft pull-back detection, such as... Figures 1 to 3 As shown, it includes a main frame 100, on which a feeding positioning component 500 for feeding the fixed section 630 is installed, and a back-pull limiting component 400 for clamping and limiting the fixed section 630 on the feeding positioning component 500.

[0075] The main frame 100 is also fixedly equipped with a control press 200 located on the side away from the ground of the anti-pull limit component 400 and the feeding positioning component 500. The telescopic end of the control press 200 is fixedly equipped with a clamping component 300 for clamping the three-pin joint 620.

[0076] The press 200 is controlled by any of the press control methods mentioned above for CV shaft back tension detection.

[0077] It is understandable that the three-pin joint 620 is fixedly installed at one end of the solid shaft 610. The control press 200 can drive the solid shaft 610 away from the three-pin joint 620 to insert into the fixed joint 630 on the corresponding feeding and positioning component 500 to realize the assembly of the solid shaft 610 and the fixed joint 630, or move the solid shaft 610 away from the ground after the fixed joint 630 is assembled to realize the back tension detection between the solid shaft 610 and the fixed joint 630.

[0078] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0079] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A press control method for CV shaft back tension detection, characterized in that, include: The action of returning to the origin is executed under the command of obtaining the origin. The origin trigger command includes an start signal, a stop signal, and a manual adjustment command signal; During the process of returning to the origin, the program number for laying the solid shaft, the spline parameter call unit, the first pressing parameter call unit, the pull-back parameter call unit, and the second pressing parameter call unit are obtained; the program for laying the solid shaft, the spline program, the first pressing program, the pull-back program, and the second pressing program are executed sequentially. Upon receiving the execution trigger command, the machine moves from the origin to the standby position based on the standby position information and executes the solid shaft release program; the spline program is executed based on the spline control information in the spline parameter storage unit. Before executing a pressing procedure, the workpiece ID information is bound to it, and a pressing procedure is executed based on the pressing control information in the pressing parameter storage unit. Before executing the reverse pulling procedure, the reverse pulling parameter is bound to the workpiece ID information, and the reverse pulling procedure is executed based on the reverse pulling control information in the reverse pulling parameter storage unit. Before executing the secondary pressing procedure, the secondary pressing procedure is bound to the workpiece ID information, and the secondary pressing procedure is executed based on the secondary pressing control information in the secondary pressing parameter storage unit. During the execution of the first pressing procedure, the reverse pulling procedure, and the second pressing procedure, monitoring data is acquired and matched with the first pressing control information, the reverse pulling control information, and the second pressing control information to form a judgment result. Based on the judgment result, the return-to-origin action is executed and an alarm message is output.

2. The press control method for CV shaft back tension detection according to claim 1, characterized in that, The spline parameter calling unit includes a spline parameter storage unit and spline control information recorded in the spline parameter storage unit; The spline control information includes spline position information, speed information, and pressure information.

3. The press control method for CV shaft back tension detection according to claim 1, characterized in that, The single-pass parameter call unit includes a single-pass parameter storage unit and single-pass control information recorded in the single-pass parameter storage unit; The single-press control information includes single-press position information, speed information, and pressure information.

4. The press control method for CV shaft back tension detection according to claim 1, characterized in that, The pull-back parameter calling unit includes a pull-back parameter storage unit and pull-back control information recorded in the pull-back parameter storage unit; The counter-pull control information includes counter-pull position information, speed information, and tension information.

5. The press control method for CV shaft back tension detection according to claim 1, characterized in that, The secondary input parameter calling unit includes a secondary input parameter storage unit and secondary input control information recorded in the secondary input parameter storage unit; The secondary pressing control information includes counter-pull position information, speed information, and pressure information.

6. A testing device for CV shaft reverse tension testing, characterized in that, The system includes a main frame, on which a control press is provided. The control press employs the press control method for CV shaft back tension detection as described in any one of claims 1 to 5. The telescopic end of the control press is fixedly equipped with a clamping assembly for clamping the three-pin section, and the main frame is also equipped with a reverse pull limiting assembly for clamping and limiting the fixed section. The control press can drive the solid shaft on the three-pin joint to press into the fixed joint, or drive the solid shaft on the three-pin joint to pull away from the fixed joint to one side.

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