A cutting test device and a test method for flexible materials

Abstract

The present invention relates to the technical field of flexible material cutting test, and in particular to a flexible material cutting test device and test method. A push rod is used to provide normal cutting pressure. This method can not only provide stable and continuous normal cutting pressure, but also facilitate the change of cutting pressure. A tension sensor is added to the end of the blade clamp, and the interaction characteristics of forces are utilized. The lateral cutting force can be effectively tested in real time. The normal cutting pressure is detected by setting a pressure sensor, and the pressure is transmitted to a control unit. The control unit then controls a second stepping motor to give a constant cutting force. Compared with traditional weights to control cutting force, this method has a small jitter amplitude of the cutting pressure, can continuously change the force, and is a non-stage change.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible material cutting test, and in particular to a flexible material cutting test device and a test method. Background Art

[0002] With the development of modern economy, people have higher and higher requirements on the performance of various materials. For flexible materials, they are not only required to be soft and comfortable, but also required to have good anti-cutting performance. In order to objectively test the anti-cutting performance of flexible materials, measuring instruments are needed to objectively evaluate them.

[0003] At present, the instruments for measuring the cutting force of flexible materials on the market can only apply discontinuous normal cutting pressure, and cannot test the transverse cutting force value when the flexible material is cut. In the field of flexible material anti-cutting performance, it is of great significance to test the magnitude of the transverse cutting force of the flexible material during the cutting process. The transverse cutting force in the test can be used as one of the important performance indicators of fabric anti-cutting. Therefore, a device and method that can accurately measure the transverse cutting force is needed. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a cutting test device and a test method for flexible materials, so as to solve the problem of accurately measuring the lateral cutting force in the anti-cutting performance test.

[0005] Based on the above purpose, the present invention provides a cutting test device for flexible materials, including a load-bearing housing, and further comprising:

[0006] A first stepper motor is installed on the side of the load-bearing housing, and an output end of the stepper motor is connected to a lead screw, and the lead screw penetrates the load-bearing housing;

[0007] A tension sensor, the housing of which is mounted on the nut of the lead screw;

[0008] A blade clamp, the tail of which is fixedly connected to the measuring end of the tension sensor, and a test blade is installed on the blade clamp;

[0009] A push rod is mounted at the bottom of the lead screw, and the push rod is connected to a second stepping motor that drives the push rod to move up and down;

[0010] A pressure sensor, the housing of which is fixedly mounted on the top of the push rod;

[0011] A cutting test bench is installed on the top of the pressure sensor and connected to the test end of the pressure sensor;

[0012] The control unit is electrically connected to the first stepper motor, the second stepper motor, the tension sensor and the pressure sensor, and is used to receive the cutting pressure data fed back by the pressure sensor. When the cutting pressure reaches a set value, the first stepper motor is controlled to drive the blade clamp to move back and forth to perform repeated transverse cutting. The control unit is also used to feed back the measured data of the tension sensor and the pressure sensor.

[0013] Preferably, the test blade is detachably mounted in the blade holder.

[0014] Preferably, the device further comprises a cutting stop component, which is used to detect whether the flexible material test sample is cut and send a signal to the control unit when it is cut;

[0015] When the control unit receives the signal, the first stepper motor stops working and the blade clamp and the cutting test table are restored to their initial positions.

[0016] Preferably, the cutting stop assembly comprises:

[0017] A first metal conductor disposed on the surface of the cutting test table;

[0018] a second metal conductor disposed on the surface of the test blade;

[0019] The first metal conductor and the second metal conductor form a detection switch, and the detection switch is connected to the control power supply after being connected in series with a power supply.

[0020] Preferably, a base is provided at the bottom of the load-bearing shell.

[0021] Preferably, an output end of the control unit is connected to a host computer, and is used to transmit the measured data of the tension sensor and the pressure sensor to the host computer.

[0022] This specification also provides a testing method for the flexible material cutting testing device described in any one of the above, comprising the following steps:

[0023] Set cutting parameters;

[0024] Start the device and move the test blade to the set distance;

[0025] Start the second stepper motor to push the flexible material test sample onto the test blade so that the cutting pressure is the set value;

[0026] Start the first stepper motor to drive the blade clamp to move back and forth to perform cutting action;

[0027] Feedback the data measured by the tension sensor and pressure sensor;

[0028] When the test sample is cut, the first stepper motor is stopped, and the blade clamp and the push rod are restored to their initial positions.

[0029] Preferably, the above test method further comprises:

[0030] According to the lateral cutting force measured by the tension sensor and the normal cutting force measured by the pressure sensor, the comprehensive cutting force is calculated using the following formula:

[0031] Where F is the comprehensive cutting force, F1 is the normal cutting force, and F2 is the lateral cutting force.

[0032] The beneficial effects of the present invention are as follows: the normal cutting pressure is provided by using a push rod method, which can not only provide a stable and continuous normal cutting pressure, but also facilitate the change of the cutting pressure. A tension sensor is added to the end of the blade clamp, which utilizes the interaction characteristics of the forces, and can effectively test the lateral cutting force in real time. The normal cutting pressure is detected by setting a pressure sensor, and the pressure is transmitted to the control unit, and the control unit controls the second stepper motor to give a constant cutting force. Compared with the traditional weight control cutting force, this method has the advantages of small jitter amplitude of the cutting pressure, and can continuously change the force size and is a non-stage change. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the mechanical structure of an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the framework of an electric control system according to an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of a testing method flow chart of an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of a switch signal formed by cutting according to an embodiment of the present invention;

[0038] Figure 5 It is an enlarged schematic diagram of the cutting process of an embodiment of the present invention.

[0039] The markings in the figure are:

[0040] 1. Load-bearing shell; 2. First stepper motor; 3. Blade clamp; 4. Test blade; 5. Tension sensor; 6. Cutting test table; 7. Pressure sensor; 8. Push rod; 9. Second stepper motor; 10. Control unit; 11. Base; 12. Lead screw; 101. Test sample. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0042] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] like Figure 1-Figure 5As shown, the embodiment of the present specification provides a cutting test device for flexible materials, including a load-bearing shell 1, and also includes a first stepper motor 2, a tension sensor 5, a blade clamp 3, a push rod 8, a pressure sensor 7, a second stepper motor 9, a cutting test table 6 and a control unit 10, wherein the first stepper motor 2 is installed on the side of the load-bearing shell 1, and its output end is connected to a lead screw, which penetrates into the load-bearing shell 1, specifically, penetrates into the load-bearing shell 1 by a bearing connection, the housing of the tension sensor 5 is installed on the nut of the lead screw, the measuring end of the tension sensor 5 is fixedly connected to the tail of the blade clamp 3, and a test blade 4 is installed on the blade clamp 3, then when the first stepper motor 2 starts to drive the lead screw to rotate, the tension sensor 5, the blade clamp 3 and the test blade 4 are The blade 4 moves along the radial direction of the lead screw, and the push rod 8 is installed at the bottom of the lead screw. The push rod 8 is connected to the second stepper motor 9, that is, the second stepper motor 9 drives the push rod 8 to rise and fall. The shell of the pressure sensor 7 is fixedly installed on the top of the push rod 8, and the cutting test table 6 is installed on the top of the pressure sensor 7 and connected to the test end of the pressure sensor 7. The control unit 10 is electrically connected to the first stepper motor 2, the second stepper motor 9, the tension sensor 5 and the pressure sensor 7, and is used to receive the cutting pressure data fed back by the pressure sensor 7. When the cutting pressure reaches the set value, the first stepper motor 2 is controlled to drive the blade clamp 3 to move back and forth for repeated transverse cutting. The control unit 10 is also used to feedback the measured data of the tension sensor 5 and the pressure sensor 7.

[0044] The flexible material cutting test device provided in the embodiment of this specification provides normal cutting pressure by using a push rod 8. This method can not only provide stable and continuous normal cutting pressure, but also facilitate the change of cutting pressure. A tension sensor 5 is added at the end of the blade clamp 3. The interaction characteristics of forces are utilized to effectively test the lateral cutting force in real time. The normal cutting pressure is detected by setting a pressure sensor 7, and the pressure is transmitted to the control unit 10. The control unit 10 controls the second stepping motor 9 to give a constant cutting force. Compared with the traditional weight control cutting force, this method has the advantages of small jitter amplitude of the cutting pressure, and can continuously change the force size and is a non-stage change.

[0045] As an implementation manner, the test blade 4 is detachably installed in the blade holder 3 to facilitate replacement of the test blade 4 .

[0046] As an embodiment, the device also includes a cutting stop component, which is used to detect whether the flexible material test sample 101 is cut, and send a signal to the control unit 10 when it is cut. When the control unit 10 receives the signal, it stops the first stepper motor 2 and restores the blade clamp 3 and the cutting test table 6 to their initial positions.

[0047] Examples of cut stop components include:

[0048] A first metal conductor disposed on the surface of the cutting test table 6;

[0049] A second metal conductor disposed on the surface of the test blade 4;

[0050] The first metal conductor and the second metal conductor form a detection switch, and the detection switch is connected to the control power supply after being connected in series with a power supply.

[0051] Through the above-mentioned arrangement, the problem that it is difficult to stop cutting the test sample 101 accurately can be solved. When the test blade 4 cuts through the test sample 101, the first metal conductor and the second metal conductor form a connecting line, which will generate an electrical signal to be fed back to the control unit 10. The control unit 10 stops the stepper motor from working, and the instrument automatically returns to the initialization state.

[0052] As another embodiment, the surfaces of the cutting test table 6, the test blade 4 and the blade holder 3 are all made of conductive metal. Figure 4 As shown, the blade clamp 3 is connected to the cutting test table 6 with a wire, the blade clamp 3 is connected to a signal power supply, and the wire of the cutting test table 6 is led out to connect to the control unit 10. When the test blade 4 cuts through the test sample 101, the cutting test table 6, the test blade 4 and the blade clamp 3 form a connected circuit, and the high-level signal will be received by the control unit 10, the control unit 10 will stop the stepper motor from working, and the instrument will automatically restore the test blade 4 and the cutting test table 6 to their initial positions when there is no danger.

[0053] The device also includes a power supply system for providing energy and voltage conversion to the entire device.

[0054] As an implementation manner, a base 11 is provided at the bottom of the load-bearing shell 1 .

[0055] The present specification also provides a method for testing the above-mentioned flexible material cutting test device, comprising the following steps:

[0056] Set cutting parameters;

[0057] Start the device and move the test blade 4 to a set distance;

[0058] Start the second stepper motor 9 to push the flexible material test sample 101 onto the test blade 4 so that the cutting pressure is the set value;

[0059] The first stepper motor 2 is started to drive the blade clamp 3 to move back and forth to perform cutting action;

[0060] Feedback the data measured by the tension sensor 5 and the pressure sensor 7;

[0061] When the test sample 101 is cut, the first stepper motor 2 is stopped, and the blade clamp 3 and the push rod 8 are restored to their initial positions.

[0062] Furthermore, the method further comprises:

[0063] The comprehensive cutting force is calculated based on the lateral cutting force measured by the tension sensor 5 and the normal cutting force measured by the pressure sensor 7. The calculation formula is:

[0064] Where F is the comprehensive cutting force, F1 is the normal cutting force, and F2 is the lateral cutting force.

[0065] As an implementation mode, the method further includes: detecting the normal cutting pressure in real time, and adjusting the height of the push rod 8 so that the normal cutting pressure is constant.

[0066] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0067] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cutting test device for flexible materials, comprising a load-bearing housing, characterized in that: Also includes: A first stepper motor is mounted on the side of the load-bearing housing, and an output end of the stepper motor is connected to a lead screw, and the lead screw penetrates the load-bearing housing; A tension sensor, the housing of which is mounted on the nut of the lead screw; A blade clamp, the tail of which is fixedly connected to the measuring end of the tension sensor, and a test blade is installed on the blade clamp; A push rod is mounted at the bottom of the lead screw, and the push rod is connected to a second stepping motor that drives the push rod to move up and down; A pressure sensor, the housing of which is fixedly mounted on the top of the push rod; A cutting test bench is installed on the top of the pressure sensor and connected to the test end of the pressure sensor; a control unit, electrically connected to the first stepper motor, the second stepper motor, the tension sensor and the pressure sensor, for receiving the cutting pressure data fed back by the pressure sensor, and controlling the first stepper motor to drive the blade clamp to move back and forth to perform repeated transverse cutting when the cutting pressure reaches a set value; the control unit is also used to feed back the measured data of the tension sensor and the pressure sensor; The device further comprises a cutting stop component, the cutting stop component being used to detect whether the flexible material test sample is cut and send a signal to the control unit when it is cut; When the control unit receives the signal, the first stepper motor stops working and the blade clamp and the cutting test table return to their initial positions; The cutting stop assembly comprises: A first metal conductor disposed on the surface of the cutting test table; a second metal conductor disposed on the surface of the test blade; The first metal conductor and the second metal conductor form a detection switch, and the detection switch is connected to the control unit after being connected in series with a power supply.

2. The cutting test device for flexible materials according to claim 1, characterized in that: The test blade is detachably mounted in the blade holder.

3. The cutting test device for flexible materials according to claim 1, characterized in that: A base is arranged at the bottom of the load-bearing shell.

4. The cutting test device for flexible materials according to claim 1, characterized in that: The output end of the control unit is connected to a host computer, and is used to transmit the measured data of the tension sensor and the pressure sensor to the host computer.

5. A method for testing a cutting test device for a flexible material as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: Set cutting parameters; Start the device and move the test blade to the set distance; Start the second stepper motor to push the flexible material test sample onto the test blade so that the cutting pressure is the set value; Start the first stepper motor to drive the blade clamp to move back and forth to perform cutting action; Feedback the data measured by the tension sensor and pressure sensor; When the test sample is cut, the first stepper motor is stopped, and the blade clamp and the push rod are restored to their initial positions.

6. The testing method according to claim 5, characterized in that: The test method also includes: According to the lateral cutting force measured by the tension sensor and the normal cutting force measured by the pressure sensor, the comprehensive cutting force is calculated using the following formula: Where F is the comprehensive cutting force, F1 is the normal cutting force, and F2 is the lateral cutting force.

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