Screw strength testing device based on screw production

Abstract

The utility model relates to the technical field of screw strength testing, and particularly discloses a screw strength testing device based on screw production, which comprises a testing base station, a positioning sliding mechanism arranged on the testing base station, a multi-dimensional loading mechanism arranged opposite to the positioning sliding mechanism and a control unit, the transverse guide rail assembly extends along the length direction of the test base station; the sliding base is in sliding fit with the transverse guide rail assembly; the three-axis positioning clamp comprises a supporting table arranged on the top of the sliding base and an adjustable three-jaw chuck installed on the supporting table. According to the multi-dimensional loading mechanism, by integrating a multi-dimensional loading function, a multi-dimensional precise adjusting structure, a quick change-over assembly and an automatic control unit, multi-functionalization, precision, high efficiency and intellectualization of screw strength testing are achieved, and the testing efficiency, accuracy and operation convenience are improved.

Description

Technical Field

[0001] This utility model relates to the field of screw strength testing technology, and specifically discloses a screw strength testing device based on screw production. Background Technology

[0002] In the screw manufacturing process, the strength of the screw is an important indicator of its quality, which is directly related to the reliability and safety of the screw in actual use.

[0003] Currently, existing screw strength testing devices can usually only perform tensile or compressive tests on screws, and cannot simultaneously simulate the complex stress states that screws may experience in actual working environments, such as being subjected to the combined effects of tension, compression, and torque. As a result, the test results cannot fully and accurately reflect the actual strength performance of the screws.

[0004] Furthermore, traditional testing equipment involves cumbersome parameter setting and adjustment, requiring extensive manual operation and data recording, resulting in low testing efficiency. Moreover, data acquisition and analysis are not precise or real-time enough to meet the demands of modern screw production for efficient and accurate testing. Additionally, existing equipment has poor adaptability to different screw specifications and types, necessitating frequent fixture changes and testing mechanism adjustments, increasing testing costs and time.

[0005] Therefore, there is an urgent need for a screw strength testing device that can achieve composite loading, automated control, and accurate testing to solve the problems existing in the current technology. Utility Model Content

[0006] This utility model proposes a screw strength testing device for screw production. This screw strength testing device achieves efficient, accurate and flexible screw strength testing through multi-functional testing (tensile force, compressive force, torque), high-precision adjustment, quick connector replacement, automated control and strong adaptability, which significantly improves testing efficiency and reliability.

[0007] This utility model is implemented as follows: a screw strength testing device based on screw production, comprising:

[0008] The test base, the positioning and sliding mechanism disposed on the test base, the multi-dimensional loading mechanism disposed opposite to the positioning and sliding mechanism, and the control unit;

[0009] The positioning sliding mechanism includes:

[0010] A transverse guide rail assembly is provided to extend along the length direction of the test base;

[0011] The three-axis positioning fixture includes a support platform slidably mounted on the transverse guide rail assembly and an adjustable three-jaw chuck mounted on the support platform.

[0012] The multidimensional loading mechanism includes:

[0013] The composite loading module includes an axial tension cylinder, an axial pressure cylinder, and a torque motor arranged in parallel. Each actuator has a tension sensor, a pressure sensor, and a torque sensor at its output end.

[0014] A multi-functional connector assembly, comprising a threaded connection clamp, a profile crimping end, and a torque transmission sleeve that connect to each sensor via a quick-change connector;

[0015] The threaded connection clamp is provided with a fastening screw hole that mates with the thread of the screw shank.

[0016] The working surface of the conformal crimping end is provided with a groove that matches the contour of the screw head;

[0017] The inner wall of the torque transmission sleeve is provided with a polygonal transmission groove that meshes with the shape of the screw head.

[0018] As a preferred embodiment of the screw strength testing device for screw production according to this utility model, the quick-connect connector includes:

[0019] A mounting base is fixed to the detection end face of each sensor, and the mounting base is provided with equally spaced mounting holes in the circumferential direction;

[0020] Connecting arms are symmetrically arranged on both sides of each joint assembly, and their ends are provided with positioning pins that mate with the assembly holes.

[0021] A lock nut is located at the threaded end of the locating pin.

[0022] As a preferred embodiment of the screw strength testing device for screw production according to this utility model, the transverse guide rail assembly includes:

[0023] Guide rails are embedded in the upper surface of the test base;

[0024] The first slider is slidably disposed within the guide rail and fixedly connected to the bottom of the support platform;

[0025] A horizontal lead screw is arranged parallel to the guide rail, and one end of the horizontal lead screw extends to the outside of the guide rail and is provided with a handwheel. The other end of the horizontal lead screw is threaded through the first slider.

[0026] As a preferred embodiment of the screw strength testing device for screw production according to this utility model, the composite loading module further includes:

[0027] A vertically adjustable bracket, wherein a guide groove is vertically formed on the bracket;

[0028] The floating mounting base slides into the guide groove via a second slider.

[0029] A fine-tuning screw is located at the top of the bracket, and the lower end of the fine-tuning screw extends into the guide groove and threadedly passes through the second slider to form a threaded engagement.

[0030] The axial tension cylinder, axial pressure cylinder, and torque motor are respectively fixed on their respective floating mounting bases.

[0031] In a preferred embodiment of this utility model, the brackets for the axial tension cylinder and the axial pressure cylinder are directly fixed to the top of the test base.

[0032] The bottom of the vertical adjustment bracket corresponding to the torque sensor is equipped with a longitudinal adjustment mechanism for adjusting the engagement distance between the torque transmission sleeve and the screw head.

[0033] The longitudinal adjustment mechanism includes:

[0034] A longitudinal slide rail is provided along the width direction of the test base;

[0035] The sliding platform slides along the longitudinal slide rail and is fixedly connected to the bracket.

[0036] The longitudinal lead screw is arranged parallel to the longitudinal slide rail, and one end of the longitudinal lead screw is threaded through the sliding platform to form a threaded engagement;

[0037] An adjustment handle is located at one end of the lead screw, which drives the sliding platform to move.

[0038] As a preferred embodiment of the screw strength testing device for screw production according to this utility model, the control unit includes:

[0039] The data acquisition module connects to the signals from each sensor.

[0040] The servo control module is electrically connected to the drive mechanism of each actuator;

[0041] The human-computer interaction interface includes a test parameter input unit and a real-time data display unit.

[0042] The beneficial effects of this utility model are:

[0043] 1. The device integrates axial tensile force, axial compressive force and torque testing functions. Through the multi-functional joint assembly and composite loading module, different test modes can be quickly switched to meet the various strength testing needs of screws, avoiding the cumbersome use of multiple single-function testing devices and improving testing efficiency.

[0044] 2. The vertical adjustment structure of the transverse guide rail assembly, longitudinal adjustment mechanism, and composite loading module enables multi-dimensional precise adjustment of the screw position and loading components, ensuring that the loading force is accurately applied to the screw during the test, thereby improving the accuracy and reliability of the test results.

[0045] 3. The quick-change connector design enables the multi-functional connector assembly to be quickly connected to and replaced with sensors, simplifying operation, saving test preparation time, and improving the flexibility of testing work.

[0046] 4. The data acquisition module, servo control module, and human-machine interface of the control unit realize the automated control of the testing process and the real-time monitoring and processing of data, which makes it convenient for operators to set test parameters and view test results, reduces human operation errors, and improves the level of intelligence of testing. Attached Figure Description

[0047] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0048] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0049] Figure 2 This is a cross-sectional structural diagram of the threaded connection clamp, the conformal crimping end, and the torque transmission sleeve of this utility model.

[0050] Figure 3 for Figure 2 An enlarged structural diagram of point A in the middle.

[0051] Figure 4 This is a cross-sectional view of the longitudinal adjustment mechanism of this utility model.

[0052] The markings in the diagram are as follows: 1. Test base; 2. Control unit; 3. Lateral guide rail assembly; 4. Support platform; 5. Adjustable three-jaw chuck; 6. Axial tension cylinder; 7. Axial pressure cylinder; 8. Torque motor; 9. Tension sensor; 10. Pressure sensor; 11. Torque sensor; 12. Quick-change connector; 13. Threaded connection chuck; 14. Contour crimping end; 15. Torque transmission sleeve; 16. Fastening screw hole; 17. Groove; 18. Polygonal transmission groove; 19. Mounting base plate; 20. Assembly hole; 21. Connecting arm; 22. Positioning pin; 23. Locking nut; 24. Guide rail; 25. First slider; 26. Horizontal lead screw; 27. Handwheel; 28. Bracket; 29. ​​Guide groove; 30. Floating mounting seat; 31. Second slider; 32. Fine-tuning screw; 33. Longitudinal rail; 34. Sliding platform; 35. Longitudinal lead screw; 36. Adjustment handle. Detailed Implementation

[0053] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0054] Please see Figure 1-4 A screw strength testing device based on screw manufacturing, comprising:

[0055] Test base 1, positioning and sliding mechanism provided on test base 1, multi-dimensional loading mechanism provided opposite to positioning and sliding mechanism and control unit 2;

[0056] The positioning and sliding mechanism includes:

[0057] The transverse guide rail assembly 3 extends along the length of the test base 1;

[0058] The three-axis positioning fixture includes a support platform 4 that is slidably mounted on the transverse guide rail assembly 3 and an adjustable three-jaw chuck 5 mounted on the support platform 4.

[0059] Multidimensional loading mechanisms include:

[0060] The composite loading module includes an axial tension cylinder 6, an axial pressure cylinder 7 and a torque motor 8 arranged in parallel. The output end of each actuator is equipped with a tension sensor 9, a pressure sensor 10 and a torque sensor 11, respectively.

[0061] The multi-functional connector assembly includes a threaded connection clamp 13, a profile crimping end 14, and a torque transmission sleeve 15, which are connected to each sensor via a quick-change connector 12.

[0062] The threaded connection chuck 13 is provided with a fastening screw hole 16 that mates with the thread of the screw shank;

[0063] The working surface of the conformal crimping end 14 is provided with a groove 17 that matches the contour of the screw head;

[0064] The inner wall of the torque transmission sleeve 15 is provided with a polygonal transmission groove 18 that engages with the shape of the screw head.

[0065] In this embodiment: When the screw strength testing device is working, the screw is first placed in the adjustable three-jaw chuck 5 of the three-axis positioning fixture and clamped and positioned by the adjustable three-jaw chuck 5; the handwheel 27 of the transverse guide rail assembly 3 is used to rotate the transverse lead screw 26, which drives the first slider 25 to move along the guide slide rail 24 to achieve lateral adjustment of the screw position; for the torque motor 8, the longitudinal lead screw 35 can be rotated by the adjustment handle 36 of the longitudinal adjustment mechanism to drive the sliding platform 34 to move on the longitudinal slide rail 33, and adjust the meshing distance between the torque transmission sleeve 15 and the screw head; at the same time, the fine-tuning screw 32 of the composite loading module can adjust the position of the floating mounting seat 30 in the guide slide groove 29 to achieve vertical fine-tuning of the axial tension cylinder 6, the axial pressure cylinder 7 and the torque motor 8 to ensure accurate alignment with the screw;

[0066] During testing, the corresponding multi-functional connector assembly is selected according to different testing requirements and connected to the sensor via quick-change connector 12. For example, in tensile testing, the threaded connection chuck 13 is connected to the tensile sensor 9 via quick-change connector 12, so that the threaded connection chuck 13 engages with the screw shank thread. The axial tensile cylinder 6 is activated, and the tensile data is monitored by the tensile sensor 9. The data acquisition module collects and transmits the data to the control unit 2. In pressure testing, the conformal crimping end 14 is connected to the pressure sensor 10. The screw head is fixed using the groove 17 structure that matches the contour of the screw head on the working surface of the conformal crimping end 14. The axial pressure cylinder 7 applies pressure, and the pressure sensor 10 provides feedback data. In torque testing, the torque transmission sleeve 15 is connected to the torque sensor 11. Its inner wall polygonal transmission groove 18 engages with the screw head. The torque motor 8 applies torque, and the torque sensor 11 collects data. The servo control module controls the drive mechanism of each actuator according to the set test parameters to realize multi-dimensional loading testing of the screw. The test data is displayed in real time on the human-machine interface.

[0067] The adjustable three-jaw chuck 5 is an existing structure, the specific structure of which is not shown in the figure. The adjustable three-jaw chuck 5 includes: a chuck body, which is equipped with a planetary gear transmission mechanism; radial adjustment jaws, which are evenly distributed around the circumference of the chuck body, and the working surface of each adjustment jaw is provided with anti-slip texture; and a fine adjustment knob, which is connected to the sun gear shaft of the planetary gear transmission mechanism.

[0068] As a technical optimization of this utility model, the quick-change connector 12 includes:

[0069] Mounting substrate 19 is fixed to the detection end face of each sensor. Mounting substrate 19 is provided with mounting holes 20 arranged in equal intervals around its circumference.

[0070] Connecting arms 21 are symmetrically arranged on both sides of each joint assembly, and their ends are provided with positioning pins 22 that mate with the assembly holes 20.

[0071] Locking nut 23 is located at the threaded end of locating pin 22.

[0072] In this embodiment: the mounting base plate 19 is fixed on the sensor detection end face, the connecting arm 21 and the positioning pin 22 cooperate with the mounting hole 20 of the mounting base plate 19 and are fixed by the locking nut 23, so as to realize the quick connection and disassembly of the multi-functional connector assembly and the sensor, which facilitates the quick switching of connectors between different test items and improves test efficiency.

[0073] As a technical optimization of this utility model, the transverse guide rail assembly 3 includes:

[0074] Guide rail 24 is embedded in the upper surface of test base 1;

[0075] The first slider 25 is slidably disposed within the guide rail 24 and is fixedly connected to the bottom of the support platform 4;

[0076] A horizontal lead screw 26 is arranged parallel to the guide rail 24, and one end of the horizontal lead screw 26 extends to the outside of the guide rail 24 and is provided with a handwheel 27. The other end of the horizontal lead screw 26 is threaded through the first slider 25.

[0077] In this embodiment: the guide rail 24 provides guidance, the first slider 25 is fixedly connected to the bottom of the support platform 4, the horizontal screw 26 and the handwheel 27 cooperate, by rotating the handwheel 27 to drive the horizontal screw 26 to rotate, driving the first slider 25 to move along the guide rail 24, so as to achieve precise adjustment of the lateral position of the screw, so that the screw and the multi-dimensional loading mechanism are accurately aligned.

[0078] As a technical optimization of this utility model, the composite loading module further includes:

[0079] A vertically adjustable bracket 28, on which a guide groove 29 is vertically opened;

[0080] The floating mounting base 30 slides in conjunction with the guide groove 29 via the second slider 31.

[0081] The fine-tuning screw 32 is located at the top of the bracket 28. The lower end of the fine-tuning screw 32 extends into the guide groove 29 and is threaded through the second slider 31 to form a threaded engagement.

[0082] The axial tension cylinder 6, the axial pressure cylinder 7, and the torque motor 8 are respectively fixed on the corresponding floating mounting base 30.

[0083] In this embodiment, the vertically adjustable bracket 28, the floating mounting base 30, and the fine-tuning screw 32 work together. By adjusting the fine-tuning screw 32, the axial tension cylinder 6, the axial pressure cylinder 7, and the torque motor 8 can be finely adjusted in the vertical direction, ensuring that each loading component is accurately aligned with the screw and improving the accuracy of the test force application.

[0084] As a technical optimization of this utility model, the test base 1 further includes:

[0085] The longitudinal adjustment mechanism includes:

[0086] Longitudinal slide rail 33 is set along the width direction of test base 1;

[0087] The sliding platform 34 slides in conjunction with the longitudinal slide rail 33 and is fixedly connected to the bracket 28;

[0088] The longitudinal lead screw 35 is parallel to the longitudinal slide rail 33, and one end of the longitudinal lead screw 35 is threaded through the sliding platform 34 to form a threaded engagement.

[0089] The adjustment handle 36 is located at one end of the lead screw 35, and drives the sliding platform 34 to move through the lead screw 35.

[0090] In this embodiment, the longitudinal slide rail 33, the sliding platform 34, the longitudinal lead screw 35, and the adjusting handle 36 form a longitudinal adjustment mechanism. By rotating the adjusting handle 36, the longitudinal lead screw 35 is driven to move, which in turn moves the sliding platform 34 on the longitudinal slide rail 33. This adjusts the engagement distance between the torque transmission sleeve 15 corresponding to the torque motor 8 and the screw head, ensuring the accuracy and stability of torque transmission during torque testing.

[0091] As a technical optimization of this utility model, the control unit 2 includes:

[0092] The data acquisition module connects to the signals from each sensor.

[0093] The servo control module is electrically connected to the drive mechanism of each actuator;

[0094] The human-computer interaction interface includes a test parameter input unit and a real-time data display unit.

[0095] In this embodiment: the data acquisition module collects data from each sensor in real time, providing a basis for test result analysis; the servo control module controls each actuator drive mechanism according to the set parameters, realizing precise control of the test process; the test parameter input unit of the human-machine interface facilitates operators to set test conditions, and the real-time data display unit enables operators to intuitively understand the data changes during the test process, facilitating timely adjustment of test parameters and judgment of test results.

[0096] Working principle and usage process of this utility model:

[0097] The screw to be tested is placed in the adjustable three-jaw chuck 5 of the three-axis positioning fixture. By adjusting the three-jaw chuck, the screw is firmly clamped to ensure that it will not shift during the test. The handwheel 27 of the transverse guide rail assembly 3 is used to rotate the horizontal lead screw 26, causing the first slider 25 to move along the guide rail 24, adjusting the screw to a suitable transverse position so that it is roughly aligned with the multi-dimensional loading mechanism. For the composite loading module, the fine-tuning screw 32 is adjusted to move the floating mounting base 30 up and down within the guide groove 29, enabling fine-tuning of the axial tension cylinder 6, axial pressure cylinder 7, and torque motor 8 in the vertical direction, ensuring that the output ends of each loading component are at the same height as the screw and can be accurately aligned. If a torque test is required, the screw is rotated... The adjustment handle 36 of the longitudinal adjustment mechanism drives the longitudinal lead screw 35 to move the sliding platform 34 on the longitudinal slide rail 33, precisely adjusting the engagement distance between the torque transmission sleeve 15 corresponding to the torque motor 8 and the screw head to ensure tight engagement. Depending on the specific testing requirements, select the corresponding multi-functional connector assembly; for example, for tensile testing, select the threaded connection chuck 13; for pressure testing, select the conformal crimping end 14; for torque testing, select the torque transmission sleeve 15. Connect the selected connector assembly to the corresponding sensor via the quick-change connector 12, ensuring that the positioning pin 22 of the connecting arm 21 is accurately inserted into the mounting hole 20 of the mounting base plate 19, and then tighten the locking nut 23 to ensure a secure connection.

[0098] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0099] However, the above are merely specific embodiments of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A screw strength testing device based on screw manufacturing, characterized in that, include: Test base (1), positioning and sliding mechanism disposed on the test base (1), multi-dimensional loading mechanism disposed opposite to the positioning and sliding mechanism, and control unit (2); The positioning sliding mechanism includes: A transverse guide rail assembly (3) is provided to extend along the length direction of the test base (1); The three-axis positioning fixture includes a support platform (4) slidably mounted on the transverse guide rail assembly (3) and an adjustable three-jaw chuck (5) mounted on the support platform (4); The multidimensional loading mechanism includes: The composite loading module includes an axial tension cylinder (6), an axial pressure cylinder (7), and a torque motor (8) arranged in parallel. Each actuator has a tension sensor (9), a pressure sensor (10), and a torque sensor (11) at its output end. The multi-functional connector assembly includes a threaded connection clamp (13) connected to each sensor via a quick-change connector (12), a profile crimping end (14), and a torque transmission sleeve (15); The threaded connection chuck (13) is provided with a fastening screw hole (16) that engages with the screw shank thread; The working surface of the conformal crimping end (14) is provided with a groove (17) that matches the contour of the screw head; The inner wall of the torque transmission sleeve (15) is provided with a polygonal transmission groove (18) that meshes with the shape of the screw head.

2. The screw strength testing device based on screw production according to claim 1, characterized in that: The quick-connect connector (12) includes: Mounting substrate (19) is fixed to the detection end face of each sensor. The mounting substrate (19) is provided with mounting holes (20) arranged in equal intervals around the periphery. Connecting arms (21) are symmetrically arranged on both sides of each joint assembly, and their ends are provided with positioning pins (22) that cooperate with the assembly holes (20); A locking nut (23) is provided at the threaded end of the locating pin (22).

3. The screw strength testing device based on screw production according to claim 1, characterized in that: The transverse guide rail assembly (3) includes: Guide rail (24) is embedded in the upper surface of test base (1); The first slider (25) is slidably disposed in the guide rail (24) and fixedly connected to the bottom of the support platform (4); A horizontal lead screw (26) is arranged parallel to the guide slide rail (24), and one end of the horizontal lead screw (26) extends to the outside of the guide slide rail (24) and is provided with a handwheel (27). The other end of the horizontal lead screw (26) is threaded through the first slider (25).

4. The screw strength testing device based on screw production according to claim 1, characterized in that: The composite loading module further includes: A vertically adjustable bracket (28) is provided with a guide groove (29) vertically. The floating mounting base (30) slides with the guide groove (29) via the second slider (31); A fine-tuning screw (32) is located on the top of the bracket (28). The lower end of the fine-tuning screw (32) extends into the guide groove (29) and threadedly passes through the second slider (31) to form a threaded engagement. The axial tension cylinder (6), axial pressure cylinder (7), and torque motor (8) are respectively fixed on the corresponding floating mounting base (30).

5. The screw strength testing device based on screw production according to claim 1, characterized in that: The brackets (28) of the axial tension cylinder (6) and the axial pressure cylinder (7) are directly fixed to the top of the test base (1): The bottom of the vertical adjustment bracket (28) corresponding to the torque sensor (11) is provided with a longitudinal adjustment mechanism for adjusting the engagement distance between the torque transmission sleeve (15) and the screw head: The longitudinal adjustment mechanism includes: A longitudinal slide rail (33) is provided along the width direction of the test base (1); The sliding platform (34) is slidably engaged with the longitudinal slide rail (33) and fixedly connected to the bracket (28); The longitudinal lead screw (35) is arranged parallel to the longitudinal slide rail (33), and one end of the longitudinal lead screw (35) is threaded through the sliding platform (34) to form a threaded engagement; An adjustment handle (36) is located at one end of the longitudinal lead screw (35) and drives the sliding platform (34) to move via the longitudinal lead screw (35).

6. The screw strength testing device based on screw production according to claim 1, characterized in that: The control unit (2) includes: The data acquisition module connects to the signals from each sensor. The servo control module is electrically connected to the drive mechanism of each actuator; The human-computer interaction interface includes a test parameter input unit and a real-time data display unit.

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