Riveting assembly torque fatigue testing machine

Abstract

This invention discloses a torque fatigue testing machine for riveting components, relating to the technical field of torque testing equipment. It includes: workpiece one, workpiece two, and a first component. The first component includes a main frame and an annular shell fixedly connected to the main frame. A four-jaw chuck is disposed within the annular shell, and a chuck shaft is fixedly connected to the bottom of the four-jaw chuck. Through optimized overall structural design, the machine is compatible with multiple types of workpieces, significantly expanding its applicability. It can simultaneously handle the clamping, positioning, and torque testing of easily disintegrating workpieces such as riveted sheet-like control arms and shaft / column workpieces, without requiring replacement of the entire machine or customization of special fixtures. This overcomes the limitation of traditional equipment that can only adapt to a single type of workpiece, significantly improving the equipment's versatility and utilization. Simultaneously, it considers miniaturization and on-site workshop deployment, with a compact and integrated overall structure, no redundant volume, and no need for a dedicated testing site. It can be directly deployed in the production workshop for rapid on-site sampling inspection before shipment.

Description

Technical Field

[0001] This invention relates to the field of torque testing equipment technology, specifically a torque fatigue testing machine for riveting components. Background Technology

[0002] The control arm assembly is an important load-bearing component in the equipment structure. Its key mechanical indicators, such as torsional stiffness, yield torque, and ultimate breaking torque, directly affect the overall assembly stability and operational safety. Therefore, torsional performance testing is an indispensable quality inspection process in the manufacturing of control arm assemblies.

[0003] Currently, the torque testing methods for control arm components in the industry are relatively traditional, and various testing methods and equipment generally suffer from insufficient compatibility. At present, routine testing mostly relies on manual torque tools to complete the operation, with the entire process depending on manual application of force. This not only results in low testing efficiency but also in significant errors caused by human operation. It can only meet the needs of sporadic sampling inspections of a small number of samples and is completely unsuitable for the routine testing requirements of large-scale mass production in factories.

[0004] Meanwhile, some production scenarios utilize small benchtop torque verifiers for auxiliary testing. These devices are compact and easy to place, suitable for routine fastening torque calibration and routine torque testing of small components. However, the overall frame rigidity is weak, the structural load-bearing capacity is limited, and the equipment itself lacks any safety protection structures. When conducting destructive torsion tests such as yielding and fracture on riveted control arm assemblies, the workpiece is prone to tearing and fracture during the process of strong torsion, easily resulting in component springback and fragmentation, posing a significant safety hazard. Furthermore, existing testing fixtures have a single structure and poor versatility, unable to accommodate control arm assemblies of different structural types. When faced with workpieces of different shapes and sizes, such as sheet-like spliced ​​types and column-shaft types, quick replacement and debugging are difficult and cumbersome, further limiting the actual testing application range. While high-precision large-scale microcomputer torsion testing machines can accurately complete various torsion mechanics tests and provide comprehensive and reliable test data, they are expensive to purchase and maintain, bulky in size, require a large space, and necessitate a dedicated testing area. Furthermore, their complex operating logic, cumbersome tooling debugging, and long testing time make them difficult to deploy in production workshops, hindering rapid on-site inspections. Even with customized fixtures, they can only be adapted to a single type of workpiece and cannot meet the general testing needs of multi-specification and multi-structure control arm components, resulting in poor flexibility and making them difficult for small and medium-sized manufacturing enterprises to adopt.

[0005] It is evident that existing conventional testing equipment and methods not only struggle to simultaneously balance operational efficiency, safety, and equipment usage costs in mass production testing within the workshop, but also suffer from drawbacks such as a narrow range of workpiece compatibility and weak versatility. This makes it impossible to efficiently, safely, and economically complete standardized torsional performance testing of control arm components with different structures, thus hindering the overall improvement of product quality control before shipment.

[0006] Therefore, our invention proposes a torque fatigue testing machine for riveting components to solve the above problems. Summary of the Invention

[0007] In view of this, the present invention proposes a torque fatigue testing machine for riveting components to solve the problems existing in the prior art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a torque fatigue testing machine for riveting components, comprising: workpiece one, workpiece two, and further comprising: a first component; The first component includes a main frame and an annular shell fixedly connected to the main frame. A four-jaw chuck is provided inside the annular shell. A chuck shaft is fixedly connected to the bottom of the four-jaw chuck. A bearing is sleeved on the chuck shaft. A torque sensor is provided at the bottom of the chuck shaft. A touch screen is provided on the main frame, and a start switch is provided on both sides of the touch screen. The start switch is located on the main frame. A secondary disk is fixed on the ring shell, an inner groove is provided in the secondary disk, and holes are provided at equal intervals on the top surface of the secondary disk. A bracket is fixedly connected to the top of the main frame, and a telescopic electric cylinder is fixedly connected to the bracket. A top cover is fixedly connected to the telescopic end of the telescopic electric cylinder, and a plug rod is fixedly connected around the bottom surface of the top cover.

[0009] Preferably, a second component is also included; The second component includes a fixture, and the sub-disc has a locking groove A. The locking grooves A are symmetrically distributed on the sub-disc, and a handle is fixedly connected to the two locking grooves A by screws.

[0010] Preferably, the sub-disc has a locking groove B, and a pressure plate is fixedly connected to the locking groove B by screws; A cavity is formed in the middle of the sub-disc, and a magnet is placed in the cavity. The magnet and the vertical axis of the workpiece are on the same vertical line.

[0011] Preferably, the workpiece includes a gear sleeve, a cover plate, a control arm, and a control arm gear, wherein the control arm gear, the cover plate, and the control arm are sequentially sleeved on the outside of the gear sleeve, and the gear sleeve is fixed relative to each other after being riveted at the end.

[0012] Preferably, the upper cover, the sub-disc, and the ring shell constitute a working cavity assembly.

[0013] Preferably, the slot and the insertion rod are on the same vertical line.

[0014] Preferably, the magnet is implemented as a neodymium magnet.

[0015] Compared with the prior art, the present invention provides a torque fatigue testing machine for riveting components, which has the following advantages: 1. The design of the working cavity assembly consisting of the upper cover, the secondary disk, and the ring shell in this invention offers the following advantages: Effectively solves the safety hazards of destructive testing: The design of a fully enclosed working chamber composed of a top cover, a secondary disc, and a ring shell completely covers the non-axis / cylinder and easily disintegrated control arm components within the chamber; when the workpiece disintegrates, explodes, or breaks under strong torsional force, the fragments and rebound components are confined within the chamber; effectively avoiding the risks of flying fragments and injury from rebounding components, and overcoming the problems of lack of protection and poor safety of traditional equipment, thus greatly improving the safety of operators; Simplify on-site cleanup after testing and improve testing efficiency: After the workpiece breaks apart, all of it remains inside the closed cavity, eliminating the need for extensive searching of scattered fragments and on-site cleaning of splashes. This significantly shortens the post-test processing time, adapts to the rapid and continuous testing needs of mass production lines in workshops, and solves the problems of cumbersome and inefficient on-site cleanup after traditional destructive testing. With its compact structure, it is suitable for deployment in the workshop. The protective structure does not interfere with the testing accuracy, balancing safety and precision: The cavity is integrated into the main body of the equipment, without occupying additional space or requiring a separate test area. It combines high safety with equipment miniaturization, unlike the bulky footprint of large microcomputer torsion testing machines. It can be directly placed on the production site for rapid testing before leaving the factory. At the same time, the enclosed cavity only provides physical protection and does not affect torque loading, force value acquisition, and angular displacement measurement. It improves safety without reducing testing accuracy, achieving simultaneous compliance of safety protection and performance testing.

[0016] 2. The present invention, through the cooperation of the pressure plate and the handle, can bring the following advantages: Effective constraint of shaft / column workpiece to avoid test displacement: The pressure plate and the inner wall of the top of the handle form a "two-way limiting constraint", which stably clamps and positions the shaft / column workpiece during torque loading, avoiding axial movement, radial runout or circumferential slippage of the workpiece under torsional force, and ensuring the stability of the test state from the structure. Improve torque detection accuracy and data reliability: With no workpiece displacement or loosening, it can ensure stable transmission of torsional force and accurate data collection by torque sensors, eliminating test errors caused by workpiece displacement, making key indicators such as yield torque, breaking torque, and torsional stiffness more reliable, and the test results can be directly used for quality judgment. Reduce workpiece damage and improve test consistency: Uniform constraint force avoids local stress concentration, prevents workpiece slippage due to excessively loose clamping or damage due to excessively tight clamping, ensures consistent clamping state when multiple parts are repeatedly tested, and improves the comparability and stability of fatigue test and destructive test results.

[0017] 3. Through its overall design, this invention offers the following advantages: One machine is compatible with multiple types of workpieces, greatly expanding the scope of application: Through the overall structural optimization design, this equipment can simultaneously adapt to the clamping, positioning and torque testing of easily detachable workpieces such as riveted plate-shaped control arms and shaft / column workpieces. There is no need to replace the whole machine or customize special fixtures. It breaks through the limitation of traditional equipment that can only adapt to a single type of workpiece, and significantly improves the versatility and utilization of the equipment. Balancing miniaturization and on-site workshop deployment, solving space occupancy problems: The overall structure is compact and integrated, with no redundant volume and no need for a dedicated testing site. It can be directly placed on the production line to achieve rapid on-site sampling inspection before leaving the factory. Unlike large torsion testing machines that occupy a large area and require a separate room, it meets the space requirements for mass production testing in factories. With controllable costs and outstanding economic efficiency, it is suitable for widespread adoption by small and medium-sized enterprises: The equipment adopts a high cost-performance structure design, and the purchase cost, use cost and maintenance cost are far lower than those of large-scale microcomputer-controlled torsion testing machines. It is easy to operate and requires no professional skills. It balances testing accuracy and use cost, solving the pain point that small and medium-sized enterprises cannot afford high-priced equipment, and is easy to be widely used in the industry. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the main structure of the present invention; Figure 2 This is a front view of the main structure of the present invention; Figure 3 This is a three-dimensional schematic diagram of workpiece one of the present invention; Figure 4 This is a diagram showing the structural positions of the four-jaw chuck, bearings, chuck shaft, and torque sensor in this invention. Figure 5 This is a diagram showing the state of the workpiece being installed and fixed for testing in this invention. Figure 6 This is a three-dimensional schematic diagram of workpiece two of the present invention; Figure 7 This is a three-dimensional schematic diagram of the fixture in this invention; Figure 8 This is a diagram showing the location distribution of the sub-disc, handle, and pressure plate in this invention. Figure 9 This is a diagram showing the state of workpiece two being installed and fixed for testing in this invention. Figure 10This is a diagram showing the state of the handle after half-section in this invention, as well as the structural positions of the handle, magnet, and workpiece II.

[0019] In the picture: 1. Workpiece One; 2. Workpiece Two; First Component: 301. Main Frame; 302. Ring Shell; 303. Four-Jaw Chuck; 304. Bearing; 305. Chuck Shaft; 306. Torque Sensor; 307. Touch Screen; 308. Start Switch; 309. Sub-Disc; 310. Inner Slot; 311. Hole Slot; 312. Telescopic Electric Cylinder; 313. Top Cover; 314. Insert Rod; Second component: 401, jig; 402, locking slot A; 403, handle; 404, locking slot B; 405, pressure plate; 406, magnet. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] Example Please refer to Figures 1 to 5 , Figure 7 As shown: To address the problems mentioned in the technical solutions, this application provides a torque fatigue testing machine for riveting components, comprising: a workpiece 1, and a first component; the first component includes a main frame 301 and an annular shell 302 fixedly connected to the main frame 301, a four-jaw chuck 303 disposed inside the annular shell 302, a chuck shaft 305 fixedly connected to the bottom of the four-jaw chuck 303, a bearing 304 sleeved on the chuck shaft 305, and a torque sensor 306 disposed at the bottom of the chuck shaft 305; the main frame 301 is equipped with... A touch screen 307 is provided, and a start switch 308 is provided on both sides of the touch screen 307. The start switch 308 is provided on the main frame 301. A secondary plate 309 is fixed on the ring shell 302. An inner position groove 310 is opened in the secondary plate 309. Holes 311 are opened at equal intervals on the top surface of the secondary plate 309. A bracket is fixedly connected to the top of the main frame 301. A telescopic electric cylinder 312 is fixedly connected to the bracket. A top cover 313 is fixedly connected to the telescopic end of the telescopic electric cylinder 312. A plug rod 314 is fixedly connected around the bottom surface of the top cover 313.

[0023] in: Workpiece 1 includes a gear sleeve, a cover plate, a control arm, and a control arm gear. The control arm gear, the cover plate, and the control arm are sequentially fitted onto the outside of the gear sleeve. After the gear sleeve is riveted at the end, the above four components are relatively fixed.

[0024] The first component is mainly used to test workpieces of different sizes, and during the test, it ensures that the gear sleeve, cover plate, control arm, and control arm gear that are spliced ​​and riveted together will not break apart, causing injury to personnel.

[0025] The operator can adjust the jaws of the four-jaw chuck 303 to move closer to or further away from the workpiece to be clamped and fixed by turning the wrench in both forward and reverse directions.

[0026] The chuck shaft 305 is fitted with a bearing 304 to ensure smooth rotation and reduce torque acquisition errors.

[0027] The touch screen 307 sets the test torque value, and the equipment is started by pressing the start switch 308 with both hands at the same time; the touch screen 307 can set forward, reverse and continuous alternating forward and reverse operation.

[0028] The start switch 308 is equipped with a set of switches, and the test can only be started when they are pressed simultaneously.

[0029] When the telescopic electric cylinder 312 drives the upper cover 313 to approach and finally attach to the upper surface of the auxiliary plate 309, the relative positions of the two are limited by the slot 311 and the insertion rod 314. When the drive motor connected to the torque sensor 306 rotates, the workpiece 1 enters the testing stage (at this time, the bottom of the workpiece 1 is clamped by the four-jaw chuck 303, and the control arm of the workpiece 1 is fixed in the inner position slot 310 by screws). At this time, with the auxiliary plate 309 fixed, the workpiece 1 will be driven to rotate by the drive motor connected to the four-jaw chuck 303. At this time, the workpiece 1 is in a forced torsion state.

[0030] During the forced torsion test phase, if the workpiece breaks apart under the action of torsional force, since the workpiece is located in the working cavity assembly composed of the upper cover 313, the sub-disc 309 and the ring shell 302, even if it breaks apart, it will only be within the working cavity. This design can effectively improve the safety of test personnel and reduce the search and handling of broken workpieces for testing non-axial / cylindrical workpieces that are prone to break apart.

[0031] A further embodiment: Please refer to Figure 1 , Figure 2 , Figure 4 , Figures 6 to 10 As shown: A torque fatigue testing machine for riveting components includes: workpiece 2, and a first component; the first component includes a main frame 301 and an annular shell 302 fixedly connected to the main frame 301. A four-jaw chuck 303 is provided inside the annular shell 302. A chuck shaft 305 is fixedly connected to the bottom of the four-jaw chuck 303. A bearing 304 is sleeved on the chuck shaft 305. A torque sensor 306 is provided at the bottom of the chuck shaft 305. A touch screen 307 is provided on the main frame 301. A start switch 308 is provided on both sides of the touch screen 307. The start switches 308 are provided on the main frame 301. A secondary disk 309 is fixed on the annular shell 302. The second component includes a fixture 401, a secondary plate 309 with a locking groove A402 symmetrically distributed on the secondary plate 309, and a handle 403 fixedly connected to the two locking grooves A402 by screws. The secondary plate 309 also has a locking groove B404 with a pressure plate 405 fixedly connected to the locking groove B404 by screws. A cavity is formed in the middle of the secondary plate 309, and a magnet 406 is installed in the cavity. The magnet 406 is on the same vertical line as the vertical axis of the workpiece 2.

[0032] in: The second component is mainly an adaptation and adjustment based on the first component, and can be used to test cylindrical workpieces; when used in conjunction with the first component, it can improve the torque testing of different workpieces, increase the overall testing breadth of the device, and improve its completeness.

[0033] The fixture 401 is equipped with protruding buckles, which are selected according to the specific workpiece 2 to be tested, and are used to restrict the engagement between the workpiece 2 and the workpiece 2 to ensure the relative fixation of the two after they are spliced ​​together.

[0034] The locking groove A402 is used to limit the handle 403 and provide recessed space for its installation; during testing, the handle 403 is fixed in the locking groove A402 by screws.

[0035] Both the pressure plate 405 and the inner wall of the handle 403 can restrict the shaft / column workpiece 2, preventing it from displacing under torque testing.

[0036] Magnet 406 was implemented as a neodymium magnet.

[0037] The magnet 406 installed in the inner cavity of the handle 403 can magnetically attract the workpiece 2 during testing, thereby limiting the top of the shaft / column workpiece 2; the workpiece 2 is held by the four-jaw chuck 303 through the fixture 401; under the above-mentioned limiting state, the test of the workpiece 2 can begin. During the specific test, the movement process of the relevant parts is the same as that of the workpiece 1.

[0038] This device can perform maximum torque testing (destructive testing) and fatigue testing within its range (measuring the angle at which the drive motor rotates before the workpiece breaks apart).

[0039] All of the above-mentioned electronic control components are electrically connected to the main controller of the device.

[0040] The working principle of all the content in the above embodiments is as follows: This equipment can perform compatibility tests on different workpieces, namely, workpiece 1 with riveted plate-shaped control arms and workpiece 2 with shafts / columns. Before testing, the test torque value, rotation direction and running mode must be set through the touch screen 307. To start the test, both hands must press the start switch 308 at the same time.

[0041] The testing process for workpiece 1: Clamping and positioning: Place the bottom of workpiece 1 into the four-jaw chuck 303, adjust the jaws to complete the clamping and fixing; fix the control arm of workpiece 1 in the inner slot 310 of the auxiliary disk 309 with screws to achieve circumferential limiting.

[0042] Targeted closed protection: The telescopic electric cylinder 312 drives the upper cover 313 to move downward, and the insertion rod 314 is inserted into the slot 311 of the auxiliary plate 309 to complete the positioning, so that the upper cover 313, the auxiliary plate 309, and the ring shell 302 form a closed working cavity.

[0043] Torque test: The drive motor drives the chuck shaft 305 to rotate, and the four-jaw chuck 303 rotates synchronously, applying a torsional force to the workpiece 1; the torque sensor 306 collects torque and angle data in real time and transmits them to the control system.

[0044] Testing and Completion: If workpiece 1 breaks or fractures under torsion, the fragments are confined within the closed cavity; after the test is completed, the telescopic electric cylinder 312 drives the upper cover 313 upward, and the four-jaw chuck 303 is released to remove the workpiece and clean up the fragments.

[0045] The testing process for workpiece 2: Clamping and positioning: Fix the workpiece 2 to the fixture 401, and then put the bottom of the fixture 401 into the four-jaw chuck 303 to clamp it; the magnet 406 in the chamber of the auxiliary plate 309 magnetically attracts the top of the workpiece 2, thus achieving preliminary positioning.

[0046] Bidirectional limiting: The handle 403 is fixed to the locking groove A402 of the auxiliary plate 309 with screws, and the pressure plate 405 is fixed to the locking groove B404 with screws. The two work together with the magnet 406 to form a bidirectional constraint on the workpiece 2 in the axial, radial and circumferential directions.

[0047] Torque test: The drive motor drives the chuck shaft 305 and the four-jaw chuck 303 to rotate, applying a torsional force to the workpiece 2; the torque sensor 306 collects torque and angle data.

[0048] Testing and Completion: After the test is completed, remove the handle 403, pressure plate 405 and four-jaw chuck 303, remove workpiece 2 and fixture 401, and the test is completed.

[0049] It should be noted that the general operating logic of the above process is as follows: All electronic components are controlled by a central controller, and the touchscreen 307 displays test data in real time, enabling the execution of maximum torque destructive tests and fatigue tests.

[0050] Please refer to the above work process. Figures 1 to 10 .

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 said element.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A torque fatigue testing machine for riveting components, including: Workpiece 1 (1) and Workpiece 2 (2) are characterized in that they further include: a first component; The first component includes a main frame (301) and an annular shell (302) fixedly connected to the main frame (301). A four-jaw chuck (303) is provided inside the annular shell (302). A chuck shaft (305) is fixedly connected to the bottom of the four-jaw chuck (303). A bearing (304) is sleeved on the chuck shaft (305). A torque sensor (306) is provided at the bottom of the chuck shaft (305). A touch screen (307) is provided on the main frame (301), and a start switch (308) is provided on both sides of the touch screen (307). The start switch (308) is located on the main frame (301). A sub-disc (309) is fixed on the annular shell (302). An inner groove (310) is provided in the sub-disc (309). Holes (311) are provided at equal intervals on the top surface of the sub-disc (309). The main frame (301) is fixedly connected to a bracket at the top, and a telescopic electric cylinder (312) is fixedly connected to the bracket. The telescopic end of the telescopic electric cylinder (312) is fixedly connected to a top cover (313), and a plug rod (314) is fixedly connected around the bottom surface of the top cover (313).

2. The torque fatigue testing machine for riveting components according to claim 1, characterized in that: It also includes a second component; The second component includes a fixture (401), and a locking groove A (402) is provided on the sub-disc (309). The locking grooves A (402) are symmetrically distributed on the sub-disc (309), and a handle (403) is fixedly connected to the two locking grooves A (402) by screws.

3. The torque fatigue testing machine for riveting components according to claim 1, characterized in that: The sub-disc (309) has a locking groove B (404), and a pressure plate (405) is fixedly connected in the locking groove B (404) by screws. The sub-disc (309) has a cavity in the middle, and a magnet (406) is installed in the cavity. The magnet (406) and the vertical axis of the workpiece (2) are on the same vertical line.

4. The torque fatigue testing machine for riveting components according to claim 1, characterized in that: The workpiece (1) includes a toothed sleeve, a cover plate, a control arm, and a control arm gear. The control arm gear, the cover plate, and the control arm are sequentially fitted onto the outside of the toothed sleeve. After the toothed sleeve is riveted at the end, the four components are relatively fixed.

5. The torque fatigue testing machine for riveting components according to claim 1, characterized in that: The upper cover (313), the sub-disc (309), and the ring shell (302) constitute the working cavity assembly.

6. The torque fatigue testing machine for riveting components according to claim 1, characterized in that: The slot (311) and the insert (314) are on the same vertical line.

7. The torque fatigue testing machine for riveting components according to claim 3, characterized in that: The magnet (406) is implemented as a neodymium magnet.

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