Tension detection device and control method thereof

Abstract

The invention discloses a tension detection device which comprises a base, a detection mechanism and a control module, the control module can control the detection mechanism, and the tension detection device further comprises a tension monitoring element connected with the detection mechanism and used for acquiring a signal of tension actually borne by a to-be-detected part; the tension monitoring element is in communication connection with the control module; the control module can receive a signal obtained by the tension monitoring element, convert the signal into a tension value, compare the obtained tension value with a set tension value, and send a control instruction to the detection mechanism according to a comparison result to adjust the tension applied by the detection mechanism to the to-be-detected part. The invention further discloses a control method of the tension detection device, the problem that a common wire harness terminal pull-out force testing machine cannot detect the crimping state of the tubular terminal with constant tension within given time during tension detection after the tubular terminal is crimped can be solved, and the detection precision and the detection efficiency are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection equipment, and in particular, relates to a tension detection device and a control method thereof. Background Art

[0002] Tubular terminals are commonly used in EMU vehicle electrical components and distribution cabinet terminal block plug-in connectors (WAGO connectors). Tubular terminals are crimped by special crimping pliers. In order to detect the crimping status of the crimping pliers and the matching relationship between the cable core, tubular terminals, and crimping pliers for tubular terminals, it is necessary to regularly use crimping pliers for tubular terminals to crimp the tubular terminals on the given cable core to make them into parts to be tested for tension.

[0003] When the tubular terminal to be tested is subjected to a tensile test, a pull-out force test is not performed. Instead, the crimped tubular terminal is fixed, and a corresponding tensile force is applied to the cable according to the cross-sectional area of ​​the cable core. The tensile force is constant and lasts for a certain period of time. If the core inside the tubular terminal does not fall out or deform, and the tubular terminal has not deformed compared to before the tensile test, the sample is deemed to have passed the tensile test.

[0004] In actual tensile tests, the cable core and sheath have a certain degree of elasticity. When the cable is pulled to a given value by a manual tensile testing machine and then locked, the cable will gradually stretch under the force, resulting in a decrease in the tensile force value. If the tensile testing machine is not locked, human position and adjustment are required, which consumes manpower. In addition, it is difficult to maintain uniformity during pulling, which reduces the quality of the tensile test.

[0005] The electric terminal tensile testing machine in use can only continuously pull the parts to be tested until the terminal falls out. It cannot maintain a constant tensile force for a certain period of time and cannot meet the test requirements of the tubular terminal parts to be tested.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] In order to solve at least part of the above-mentioned problems, one of the purposes of the present invention is to provide a tension detection device for a tubular terminal, which can solve the problem that the commonly used wire harness terminal pull-off force tester cannot detect the crimping state of the tubular terminal with a constant tension within a given time when detecting the tension after the tubular terminal is crimped, thereby improving the detection accuracy and detection efficiency.

[0008] The basic concept of the technical solution adopted in the present invention is:

[0009] A tension detection device includes a base, a detection mechanism and a control module arranged on the base, wherein the control module can send a control instruction to the detection mechanism to control the detection mechanism, and the tension detection device also includes:

[0010] A tension monitoring element, connected to the detection mechanism, for obtaining a signal of the actual tension borne by the part to be detected;

[0011] The tension monitoring element is communicatively connected with the control module;

[0012] The control module can receive the signal obtained by the tension monitoring element, convert the signal into a tension value, compare the obtained tension value with the set tension value, and send a control instruction to the detection mechanism according to the comparison result to adjust the tension applied by the detection mechanism to the part to be detected.

[0013] Furthermore, the detection mechanism includes:

[0014] A first connecting member, fixed relative to the base, and used for connecting a first end of a part to be detected;

[0015] A second connecting member, movably disposed on the base, and used for connecting to a second end of the part to be detected;

[0016] The tension monitoring element is connected to the base and the first connecting member respectively;

[0017] The telescopic pushing device is connected to the second connecting member and is used to drive the second connecting member to move so that the second connecting member is close to or away from the first connecting member.

[0018] Furthermore, the telescopic pushing device adopts a stepping motor electric cylinder.

[0019] Furthermore, the first connecting member and the second connecting member are provided with a tubular terminal fixture;

[0020] Preferably, the tubular terminal fixture adopts a plug-in connector cage spring.

[0021] Furthermore, the first connecting member and the second connecting member are both hooks;

[0022] The tubular terminal fixture is provided with a connecting ring, and the first connecting member and the second connecting member can hook the connecting ring.

[0023] Furthermore, the base includes a bottom plate;

[0024] A first vertical plate and a second vertical plate are arranged above the bottom plate at intervals in the horizontal direction;

[0025] The first connecting member is connected to the first vertical plate;

[0026] The second connecting member is movably disposed between the first vertical plate and the second vertical plate;

[0027] The telescopic pushing device is located at a side of the second vertical plate away from the first vertical plate, and the telescopic pushing device penetrates the second vertical plate and is connected to the second connecting member.

[0028] Furthermore, an upper plate is provided above the telescopic pushing device, and the control module is located on the upper plate.

[0029] Furthermore, the control module includes a drive controller and a display screen, and the display screen is circuit-connected to the drive controller.

[0030] Furthermore, the drive controller includes:

[0031] A signal processor is used to process the tension signal monitored by the tension monitoring element to determine whether the actual tension value borne by the part to be detected is lower than the set tension value;

[0032] A controller sends a control instruction to the detection mechanism according to the judgment result of the signal processor;

[0033] A memory, which internally stores control instructions for controlling the detection mechanism;

[0034] The signal receiver is used to receive the tension signal monitored by the tension monitoring element and send the tension signal to the signal processor.

[0035] A second object of the present invention is to provide a control method for a tension detection device.

[0036] The basic concept of the technical solution adopted in the present invention is:

[0037] A control method for a tension detection device, which is used to control the tension detection device, comprises the following steps:

[0038] Obtain the actual tensile force value that the part to be tested is subjected to during the tensile test;

[0039] The actual tensile force value is compared with the set tensile force value. If the actual tensile force value is less than the set tensile force value, the tensile force applied to the part to be inspected is increased so that the actual tensile force value reaches the set tensile force value.

[0040] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0041] During the tensile test of the tubular terminal, during the measurement process, when the tensile force on the part to be tested decreases due to the stretching and deformation of the part to be tested, the control module detects the reduction in tensile force, and the telescopic push-pull device increases the tensile force on the part to be tested to a given value until the specified time is reached, so that the part to be tested can maintain the pulling state with a constant torque during the tensile test.

[0042] When testing the tubular terminals, the tensile test can be performed on both ends of the tubular terminals at the same time, and the state changes of the two terminals under constant tension can be tested at one time. Since the forces on both ends are exactly the same and they are crimped by the same crimping pliers for the tubular terminals, the cable cores and the tubular terminal models used are also the same, it is easier to check and compare the tensile test results.

[0043] Using pluggable connector cage spring as a clamp, there is no need for the tightening and fixing steps of traditional clamps. The assembly is completed by prying open the clamp and inserting the tubular terminal of the test sample. The assembly and disassembly are efficient and quick. At the same time, the holding force of the pluggable connector cage spring clamp used is consistent with that of the connector used in the EMU, avoiding deformation caused by the metal part of the tubular terminal held by the traditional clamp, thereby improving the work quality.

[0044] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0046] Figure 1 It is a structural schematic diagram of the tension detection device of the present invention;

[0047] Figure 2 is a front view of the tension detection device of the present invention;

[0048] Figure 3 It is a principle block diagram of the tension detection device of the present invention;

[0049] Figure 4 It is a flow chart of the control method of the tension detection device of the present invention.

[0050] In the figure: 1. base; 11. bottom plate; 12. first vertical plate; 13. second vertical plate; 14. upper plate; 15. connecting plate; 2. detection mechanism; 21. first connecting piece; 22. second connecting piece; 23. stepper motor cylinder; 24. tubular terminal clamp; 241. connecting ring; 3. control module; 31. drive controller; 311. signal processor; 312. controller; 313. memory; 314. signal receiver; 32. display screen; 4. tension monitoring element.

[0051] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0053] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] like Figures 1 to 3 As shown, the present invention discloses a tension detection device.

[0056] The tension detection device includes a horizontally arranged base 1. A detection mechanism 2 and a control module 3 are arranged on the base 1, and the detection mechanism 2 and the control module 3 are connected by signals. The detection mechanism 2 is used to apply tension to the part to be detected. The control module 3 is used to issue a control instruction to the detection mechanism 2. After receiving the control instruction issued by the control module 3, the detection mechanism 2 performs corresponding actions according to the received control instruction to complete the tension test of the part to be detected.

[0057] In this embodiment, the base 1 includes a horizontally arranged bottom plate 11, which is a rectangular plate-shaped structure. A first vertical plate 12 and a second vertical plate 13 are arranged on the upper surface of the bottom plate 11 along the extension direction of the bottom plate 11, and the first vertical plate 12 and the second vertical plate 13 are arranged in a horizontal direction. The bottom of the first vertical plate 12 is welded and fixed to the base 1. The bottom of the second vertical plate 13 is welded and fixed to the base 1. A working position for performing tension testing on the part to be tested is formed between the first vertical plate 12 and the second vertical plate 13.

[0058] In this embodiment, the detection mechanism 2 includes a first connecting member 21 and a second connecting member 22 located between the first vertical plate 12 and the second vertical plate 13. The first connecting member 21 is used to connect to the first end of the part to be detected, and the second connecting member 22 is used to connect to the second end of the part to be detected. The first connecting member 21 is connected to a side surface of the first vertical plate 12 facing the second vertical plate 13. The second connecting member 22 is movably arranged between the first vertical plate 12 and the second vertical plate 13. The moving direction of the second connecting member 22 is arranged along the extension direction of the bottom plate 11.

[0059] The detection mechanism 2 also includes a stepper motor electric cylinder 23 located on the side of the second vertical plate 13 facing away from the first vertical plate 12, and the piston rod of the stepper motor electric cylinder 23 passes through the second vertical plate 13 and is connected to the second connecting member 22. The stepper motor electric cylinder 23 is relatively fixed to the bottom plate 11, and the piston rod of the stepper motor electric cylinder 23 is fixedly connected to the second connecting member 22. The piston rod of the stepper motor electric cylinder 23 slides relatively to the second vertical plate 13.

[0060] When performing a tensile test on the part to be tested, the first end of the part to be tested is connected to the first connecting member 21, and the second end of the part to be tested is connected to the second connecting member 22. After the part to be tested is connected to the first connecting member 21 and the second connecting member 22, the control module 3 sends a control instruction to the stepper motor cylinder 23, and the piston rod of the stepper motor cylinder 23 pulls the second connecting member 22 away from the first connecting member 21. As the second connecting member 22 gradually moves away from the first connecting member 21, a preset tensile force is applied to the part to be tested.

[0061] In this embodiment, a tension monitoring element 4 is provided between the first connecting member 21 and the first vertical plate 12, and the tension monitoring element adopts a tension sensor. The tension monitoring element 4 is connected to the first vertical plate 12 and the first connecting member 21 respectively. The tension monitoring element 4 is connected to the control module 3 by signal. The tension monitoring element 4 is used to obtain a signal of the actual tension borne by the part to be detected, and send the obtained signal to the control module 3.

[0062] In some other embodiments, a tubular terminal fixture 24 is connected to both the first connector 21 and the second connector 22. The tubular terminal fixture 24 uses a plug-in connector cage spring currently on the market. The plug-in connector cage spring can be quickly fixed to the tubular terminal, and the plug-in connector cage spring can be quickly assembled with the part to be detected or separated from the part to be detected by hand.

[0063] Preferably, the first connecting member 21 and the second connecting member 22 are both hooks. A connecting ring 241 is provided on the tubular terminal fixture 24, and the connecting ring 241 is integrally formed with the tubular terminal fixture 24. The hook can hook the connecting ring 241.

[0064] When performing tension testing on tubular terminals:

[0065] First, remove the tubular terminal fixture 24 from the first connector 21 and the second connector 22, then connect one of the tubular terminal fixtures 24 to the first end of the tubular terminal, and install the other tubular terminal fixture 24 to the second end of the tubular terminal. After installing the tubular terminal fixtures 24 on both the first and second ends of the tubular terminal, hook the tubular terminal fixtures 24 at both ends of the tubular terminal with the first connector 21 and the second connector 22, respectively, and the tubular terminal can be quickly installed between the first connector 21 and the second connector 22.

[0066] In this embodiment, an upper plate 14 is disposed on the side of the second vertical plate 13 facing away from the first vertical plate 12, and a space is left between the upper plate 14 and the bottom plate 11. The upper plate 14 is connected to the bottom plate 11 through a vertically disposed connecting plate 15, the top of the connecting plate 15 is fixed to the upper plate 14, and the bottom of the connecting plate 15 is fixed to the bottom plate 11. The stepper motor cylinder 23 is located between the upper plate 14 and the bottom plate 11.

[0067] In this embodiment, the control module 3 is fixed above the upper plate 14 .

[0068] The control module 3 receives the tension signal monitored by the tension monitoring element 4, and converts the received signal into a tension value. The obtained tension value is the actual tension value borne by the part to be detected. The actual tension value obtained is compared with the set tension value. If the actual tension value is less than the set tension value, the control module 3 sends a control instruction to the detection mechanism 2, so that the detection mechanism 2 increases the tension applied to the part to be detected, so that the actual tension value reaches the set tension value until the specified time is reached.

[0069] In this embodiment, the control module 3 includes a driving controller 31 fixed on the upper plate 14 and a display screen 32 installed on the driving controller 31 , and the display screen 32 is connected to the driving controller 31 by a circuit.

[0070] Specifically, the drive controller 31 includes a signal processor 311, a controller 312, a memory 313 and a signal receiver 314. The signal processor 311 is used to process the tension signal monitored by the tension monitoring element 4 to determine whether the actual tension value borne by the part to be detected is lower than the set tension value.

[0071] The controller 312 sends a control instruction to the detection mechanism according to the judgment result of the signal processor 311 to adjust the magnitude of the pulling force applied by the detection mechanism 2 to the part to be detected.

[0072] The memory 313 stores control instructions for controlling the detection mechanism 2 .

[0073] The signal receiver 314 is used to receive the tension signal monitored by the tension monitoring element 4 and send the tension signal to the signal processor 311 .

[0074] Specifically, the tension monitoring element 4 monitors the tension applied by the detection mechanism 2 to the detected part in real time, and transmits the monitored tension signal to the signal receiver 314. The signal receiver 314 receives the tension signal monitored by the tension monitoring element 4 and sends the tension signal to the signal processor 311.

[0075] The signal processor 311 processes the received tension signal, converts the received tension signal into a tension value, and compares the tension value with the set tension value to determine whether the actual tension borne by the part to be detected is less than the set tension.

[0076] If the actual tensile force on the part to be inspected is less than the set tensile force, the controller 312 sends a control instruction to the inspection mechanism 2 to increase the tensile force applied by the inspection mechanism 2 to the part to be inspected. According to the control instruction, the inspection mechanism 2 increases the tensile force applied to the part to be inspected so that the actual tensile force on the part to be inspected is equal to the set tensile force.

[0077] Reference Figure 4 The present invention also discloses a control method of a tension detection device, which is used to control the tension detection device disclosed in the present invention.

[0078] The control method of the tension detection device includes the following steps:

[0079] When performing a tensile test on a part to be tested, obtaining an actual tensile force value that the part to be tested is subjected to during the tensile test;

[0080] The actual tensile force value is compared with the set tensile force value. If the actual tensile force value is less than the set tensile force value, the tensile force applied to the part to be inspected is increased so that the actual tensile force value reaches the set tensile force value.

[0081] The part to be tested is kept under the adjusted tensile force until the set bearing time is reached.

[0082] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A tension detection device, comprising a base (1), a detection mechanism (2) and a control module (3) arranged on the base (1), wherein the control module (3) can send a control instruction to the detection mechanism (2) to control the detection mechanism (2), characterized in that: The tension detection device also includes: A tension monitoring element (4), connected to the detection mechanism (2), for obtaining a signal of the tension actually borne by the part to be detected; The tension monitoring element (4) is communicatively connected with the control module (3); The control module (3) is capable of receiving the signal acquired by the tension monitoring element (4), converting the signal into a tension value, and comparing the obtained tension value with a set tension value, and sending a control instruction to the detection mechanism (2) according to the comparison result to adjust the tension applied by the detection mechanism (2) to the part to be detected.

2. A tension detection device according to claim 1, characterized in that: The detection mechanism (2) comprises: A first connecting member (21), fixed relative to the base (1) and used for connecting to a first end of a part to be detected; A second connecting member (22) is movably arranged on the base (1) and is used to connect to the second end of the part to be detected; The tension monitoring element (4) is connected to the base (1) and the first connecting member (21) respectively; The telescopic pushing device is connected to the second connecting member (22) and is used to drive the second connecting member (22) to move so that the second connecting member (22) is close to or away from the first connecting member (21).

3. A tension detection device according to claim 2, characterized in that: The telescopic pushing device adopts a stepping motor electric cylinder (23).

4. A tension detection device according to claim 2, characterized in that: The first connecting piece (21) and the second connecting piece (22) are provided with a tubular terminal clamp (24); Preferably, the tubular terminal fixture (24) adopts a plug-in connector cage spring.

5. A tension detection device according to claim 4, characterized in that: The first connecting member (21) and the second connecting member (22) are both hooks; The tubular terminal fixture (24) is provided with a connecting ring (241), and the first connecting piece (21) and the second connecting piece (22) are capable of hooking the connecting ring (241).

6. A tension detection device according to claim 2, characterized in that: The base (1) comprises a bottom plate (11); A first vertical plate (12) and a second vertical plate (13) are arranged above the bottom plate (11) in a horizontally spaced arrangement; The first connecting member (21) is connected to the first vertical plate (12); The second connecting member (22) is movably arranged between the first vertical plate (12) and the second vertical plate (13); The telescopic pushing device is located on a side of the second vertical plate (13) away from the first vertical plate (12), and the telescopic pushing device passes through the second vertical plate (13) and is thus connected to the second connecting member (22).

7. A tension detection device according to claim 6, characterized in that: An upper plate (14) is arranged above the telescopic pushing device, and the control module (3) is located on the upper plate (14).

8. A tension detection device according to any one of claims 1 to 7, characterized in that: The control module (3) comprises a drive controller (31) and a display screen (32), and the display screen (32) is connected to the drive controller (31) by a circuit.

9. A tension detection device according to claim 8, characterized in that: The drive controller (31) comprises: A signal processor (311) is used to process the tension signal monitored by the tension monitoring element (4) to determine whether the actual tension value borne by the part to be detected is lower than the set tension value; A controller (312) sends a control instruction to the detection mechanism (2) according to the judgment result of the signal processor (311); A memory (313) storing control instructions for controlling the detection mechanism (2); The signal receiver (314) is used to receive the tension signal monitored by the tension monitoring element (4) and send the tension signal to the signal processor (311).

10. A control method for a tension detection device, used to control the tension detection device according to any one of claims 1 to 9, characterized in that: The steps include: Obtain the actual tensile force value that the part to be tested is subjected to during the tensile test; The actual tensile force value is compared with the set tensile force value. If the actual tensile force value is less than the set tensile force value, the tensile force applied to the part to be inspected is increased so that the actual tensile force value reaches the set tensile force value.

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