Needle Tester

Abstract

A needle tester, which relates to the technical field of needle testing, includes a bracket, and further includes: a placement plate for placing a specimen; a pressure sensor, one side of which is fixedly connected to the placement plate, and the other side of which is arranged on the bracket through a first transmission member; a needle plate for placing needles, which is arranged on a fixed beam, and the fixed beam is connected to a second transmission member; and an electric control device arranged on the bracket for controlling the operation of the tester; wherein, when the placement plate and the needle plate reciprocate relative to each other, the needles reciprocally insert into and withdraw from the specimen; or, when the placement plate and the needle plate move relative to each other, the needles impact the specimen. The beneficial effects of the present invention are as follows: It can accurately test the needles, making the acting force for testing the needles always stable in position and the force simulation more accurate; this tester has multiple functions and can conduct resilience tests, wear tests, impact resistance tests, temperature rise tests, bending fatigue tests, anti-bending break angle tests, and fracture tests.

Description

Technical Field

[0001] The present invention relates to the technical field of needle testing, and particularly to a needle tester. Background Art

[0002] The technology of producing non-woven fabrics with needles has a history of more than one hundred years. With the development of science and technology and technological progress, various new types of needles have emerged continuously. However, for the detection of the physical properties of needles, in addition to using traditional hardness testers to measure hardness, outside micrometers and calipers to measure dimensions, and metallographic microscopes to detect metallographic structures, there are no other specialized physical property detection instruments and equipment, and it is impossible to comprehensively evaluate the physical properties of various needles. As a result, there has long been a phenomenon that there are product standards, detection indicators and methods, but no professional testing instruments and means, thus bringing the following problems:

[0003] 1. Users cannot determine the quality of needles (such as wear life, anti-breaking and resilience, temperature rise generated by friction with the fabric surface, etc.) without actual use.

[0004] 2. Without knowing the physical property indicators of various types of needles of each brand, users cannot select the appropriate needle specifications, models and brands according to the final requirements of the product process.

[0005] 3. Without complete testing means and testing instruments, it is difficult for needle manufacturers to ensure the qualified rate of products and further improve product quality.

[0006] 4. When professionals in scientific research institutions, universities and research and development centers want to develop new non-woven products using new materials, they cannot accurately obtain the force exerted by each needle or the whole plate of needles when piercing the fiber web and the effect on the fiber web.

[0007] 5. Needle users do not dare to fully utilize the functions and efficiency of the needles they use.

[0008] In addition, the following test method is recorded in the "Textile Industry Standard of the People's Republic of China" FZ / T93048-2010: First, fix the entire length of the needle bar of the lancet, apply a vertical external force at a certain position from the fulcrum, the tip of the lancet moves a certain distance, after maintaining the external force for a certain time, remove the applied external force, and then measure the plastic deformation amount. During the process of the external force moving with the swing of the lancet, the lancet will slide with the external force indenter, and the action point will shift. Summary of the Invention

[0009] The purpose of the present invention is to achieve a comprehensive and accurate test of the sample needles to be tested, and a needle tester is designed.

[0010] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a needle tester comprises a bracket, and also comprises: a placement plate for placing a sample; a pressure sensor, one side of which is fixedly connected to the placement plate, and the other side is arranged on the bracket through a first transmission member; a needle plate for placing a needle, which is arranged on a fixed beam, and the fixed beam is connected to a second transmission member; and an electronic control device, which is arranged on the bracket and is used to control the operation of the tester; wherein, when the placement plate and the needle plate move back and forth relative to each other, the needle is reciprocatedly inserted and withdrawn from the sample; or, when the placement plate and the needle plate move relative to each other, the needle impacts the sample.

[0011] Furthermore, it also includes an elastic bending fatigue testing device arranged on the bracket, and the elastic bending fatigue testing device includes: a fixed platform, arranged on the bracket, used to fix the needle; and a rotating component, arranged on the bracket, and the rotating component provides a swinging arc force for the needle when rotating.

[0012] Furthermore, the rotating assembly includes: a turntable, which is arranged on the bracket; and a toggle member, which is fixedly arranged on the turntable and acts on the needle.

[0013] Furthermore, the fixed platform is provided with an intersecting fixed cavity and a movable cavity, the fixed cavity is used to fix the needle, and a conductive rod is provided in the movable cavity in the fixed platform; one end of the conductive rod is fixedly connected to one end of the first wire, and the other end faces the fixed cavity of the fixed platform; the toggle member is a conductor, one end of the toggle member is fixedly connected to one end of the second wire, and the other end of the first wire and the other end of the second wire are respectively connected to the positive and negative poles of the power supply.

[0014] Furthermore, it also includes a compression spring, which is arranged in the movable cavity of the fixing platform, one end of the compression spring is fixed, and the other end is against the conductive rod.

[0015] Furthermore, it also includes a scale plate, which is fixed on the fixing seat, and the extension lines of the scale lines of the scale plate converge at one point, which is the swing point of the needle fixed on the fixing table.

[0016] Furthermore, it also includes a first rocker arm, which is rotatably set on the bracket, and a pair of straight slots are provided on the first rocker arm, and the straight slots are located on both sides of the rotation center of the first rocker arm; a second rocker arm, which is rotatably set on the turntable, and one end of which is connected to the turntable through a compression spring 8012; a first push rod, which is slidably set on the bracket, one end of which is set in the straight slot of the first rocker arm through a pin shaft, and the other end is opposite to the second rocker arm; a second push rod, which is slidably set on the bracket, one end of which is set in the straight slot of the first rocker arm through a pin shaft, and the other end is opposite to the second rocker arm, and the first push rod and the second push rod are respectively correspondingly set on both sides of the rotation center of the first rocker arm; a third push rod, which is slidably set in the turntable, one end of which is set in the straight slot of the second rocker arm through a pin shaft; a clamping block, which is fixedly set at the other end of the third push rod, and respectively drives the needle to swing back and forth with the toggle member; the toggle member and the clamping block are respectively set on both sides of the needle.

[0017] Furthermore, the first transmission member includes: a first power device, arranged on a bracket, for providing power; a first transmission shaft, connected to the first power device through a synchronous belt; and a worm gear reducer, the worm shaft of the worm gear reducer is connected to the first transmission shaft, and the worm shaft of the worm gear reducer is connected to the placement plate.

[0018] Furthermore, there is at least one pair of worm gear reducers, and each pair of worm gear reducers is relatively arranged at two ends of the first transmission shaft.

[0019] Furthermore, it also includes a stripping plate, which is arranged between the placement plate and the needle plate, and the stripping plate is provided with through holes corresponding to the needle plate.

[0020] Furthermore, the peeling plate is arranged on the bracket through a third reciprocating motion mechanism, the third reciprocating motion mechanism is fixedly arranged on the bracket, and the third reciprocating motion mechanism is a lifting motor.

[0021] Furthermore, the second transmission member includes: a second guide sleeve fixedly arranged on the bracket; a second guide rod slidably arranged in the second guide sleeve, one end of which is connected to the fixed beam; a main shaft rotatably arranged on the bracket and connected to the main servo power device; an eccentric wheel fixedly arranged on the main shaft; and a second connecting rod, one end of which is hinged to the second guide rod and the other end is hinged to the eccentric wheel.

[0022] Further, it further includes a display, an infrared thermometer, an electronic image measuring instrument, and an audible and visual alarm, which are respectively connected to the electric control device; the display is arranged on the bracket for display; the infrared thermometer is arranged on the bracket for measuring the temperature of the test sample needle; the electronic image measuring instrument is arranged on the bracket for measuring the needle; the audible and visual alarm is arranged on the bracket and is electrically connected to the pressure sensor, the display, and the electric control device respectively for alarming in case of abnormal operation.

[0023] Further, the needle plate is provided with needle mounting holes, and the rays formed by infinitely extending in the opposite direction of the sample movement with the needle mounting holes as endpoints do not intersect.

[0024] Still further, there are several groups of the needle mounting holes, and each group of the needle mounting holes is inclined.

[0025] Still further, each group of the needle mounting holes is arranged in a broken line or an arc.

[0026] Further, the needle plate includes a substrate and an elastic layer connected to each other, and the elastic layer is arranged above the substrate. The elastic layer is provided with a directional groove, and a needle mounting round hole is arranged in the directional groove to facilitate fixing the needle.

[0027] Further, both sides of the placement plate are provided with rollers for placing the sample, and the rollers are rotatably arranged on the base.

[0028] Still further, the base is slidably arranged on the bracket.

[0029] The beneficial effects of the present invention are as follows: A professional tester is designed, which can accurately test the needle, so that the acting force for testing the needle is always in a stable position, and the force simulation is more accurate; the tester has multiple functions and can perform resilience tests, wear tests, impact resistance tests, temperature rise tests, bending fatigue tests, anti-bending break angle tests, and fracture tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the tester of the present application;

[0031] Figure 2 is a schematic diagram of the usage state of the tester of the present application;

[0032] Figure 3 is a schematic structural diagram of the needle plate of the present application, wherein each group of the needle mounting holes is inclined;

[0033] Figure 4 is a schematic structural diagram of the needle plate of the present application, wherein each group of the needle mounting holes is arranged in a broken line;

[0034] Figure 5It is a schematic diagram of the cross-sectional structure of the needle plate of the present application;

[0035] Figure 6 is a schematic diagram of the use state of the needle tester of the present application, wherein the sample a is a hardness test block;

[0036] Figure 7 It is a structural schematic diagram of the elastic bending fatigue testing device of the present application;

[0037] Figure 8 yes Figure 7 A cross-sectional view at point HH, wherein the first swing rod is at point O;

[0038] Figure 9 yes Figure 7 A cross-sectional view at HH, wherein the first swing rod is in the D1 direction position;

[0039] Figure 10 yes Figure 7 Cross-sectional view at point HH, wherein the first rocker arm is in position in direction D.

[0040] In the above figures, 1. bracket; 2. placement plate; 3. pressure sensor;

[0041] 4. needle plate; 401. needle hole; 402. base plate; 403. elastic layer;

[0042] 5. First transmission member; 501. First power device; 502. First transmission shaft; 503. Worm gear reducer;

[0043] 6. Fixed beam;

[0044] 7. Second transmission member; 701. Second guide sleeve; 702. Second guide rod; 703. Main shaft; 704. Eccentric wheel; 705. Second connecting rod; 706. Main servo power device; 707. Coupling; 708. Rotating shaft; 709. Support frame;

[0045] 8. Elastic bending fatigue testing device; 801. Fixed table; 802. Rotating assembly; 8021. Turntable; 8022. Toggle member; 803. Conductive rod; 804. Compression spring; 805. Scale plate; 806. First swing rod; 807. Second swing rod; 808. First push rod; 809. Second push rod; 8010. Third push rod; 8011. Clamp; 8012. Compression spring;

[0046] 9. Peeling plate; 10. Third reciprocating motion mechanism; 11. Display; 12. Infrared thermometer; 13. Electronic image measuring instrument; 14. Roller; 15. Base; 16. Sound and light alarm; a. Sample; b. Needle. DETAILED DESCRIPTION

[0047] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features, and effects according to the present invention as follows:

[0048] There is one or more wear loss life test forms for the sample needles to be tested, such as standard pattern cloth, standard sand disk type, and abrasive - mixed polishing belt type. The standard test sample cloth can be made of a single fiber or a mixture of two or more fibers, or can be made by superimposing and compounding multiple layers of different fiber meshes, or can be made by adding single - filaments or composite filaments of different materials in the middle of the test sample cloth, or can be added with woven fabric, knitted fabric, or warp - knitted fabric and various films in the middle or on the surface of the sample cloth.

[0049] A needle tester, such as Figures 1 to 10 shown, includes a bracket 1, a placement plate 2, a pressure sensor 3, a needle plate 4, and an electric control device.

[0050] As Figure 1 shown, the bracket 1 is used for installation and support. The placement plate 2 is used to place samples, such as sand disks, cloth, hardness test blocks, and polishing belts, etc.

[0051] One side of the pressure sensor 3 is fixedly connected to the placement plate 2, and the other side of the pressure sensor 3 is arranged on the bracket 1 through a first transmission member 5. As Figure 1 shown, the placement plate 2 is fixedly connected above the pressure sensor 3, and the increased force on the placement plate 2 will be transmitted to the pressure sensor 3; the first transmission member 5 is fixedly connected below the pressure sensor 3, and the up - and - down reciprocating movement of the placement plate 2 can be controlled through the first transmission member 5. Or the placement plate 2 is fixedly connected below the pressure sensor 3, and the increased force below the placement plate 2 will be transmitted to the pressure sensor 3; the first transmission member 5 is fixedly connected above the pressure sensor 3, and the up - and - down reciprocating movement of the placement plate 2 can be controlled through the first transmission member 5.

[0052] The needle plate 4 is used to place the needles b. The needle plate 4 is arranged on a fixed beam 6, and the fixed beam 6 is connected to a second transmission member 7. Here, preferably, a needle - loading hole 401 is provided on the needle plate 4, and the rays formed by infinitely extending in the opposite direction of the sample movement with the needle - loading hole 401 as the end point do not intersect. In Figure 3 and Figure 4 the sample moves in the up - and - down direction along the position shown in the figure. There are several groups of needle - loading holes 401. As Figure 3 shown, there are five groups of needle - loading holes 401, and each group of needle - loading holes 401 is inclined. Or as Figure 4 shown, each group of needle - loading holes 401 is arranged in a broken line. It can also be arranged that each group of needle - loading holes 401 is in an arc shape. This setting method can ensure that the needles b to be tested in the back row do not repeat the needle traces stabbed by the front row, so as to ensure that the test conditions for each needle b are consistent. Preferably, as Figure 5As shown, the needle plate 4 includes a substrate 402 and an elastic layer 403 that are connected to each other. The elastic layer 403 is disposed above the substrate 402, and the elastic layer 403 can play a role in tightly holding the needle b. The elastic layer 403 is provided with a directional groove 404, and a needle mounting hole 401 is arranged in the directional groove 404 to facilitate the placement of the needle b.

[0053] The electric control device is arranged on the bracket 1 and is used to control the operation of the tester. Regarding the electric control device, it varies according to the actual tester, and generally refers to all electric control structures, such as control systems of PLC, computer, and single-chip microcomputer, etc., which may have information processing and storage functions.

[0054] For the properties of the specimen a, when the specimen can be penetrated, such as cloth, sanding disc, and polishing belt, etc., when the placement plate 2 reciprocates relative to the needle plate 4, the needle b reciprocally inserts into and withdraws from the specimen a. Here, the relative reciprocating movement of the placement plate 2 and the needle plate 4 is divided into the following three situations: the first transmission member 5 moves and the second transmission member 7 is stationary; the first transmission member 5 is stationary and the second transmission member 7 moves; the first transmission member 5 moves and the second transmission member 7 moves. The relative reciprocating movement of the placement plate 2 and the needle plate 4 is achieved by the mutual movement of the first transmission member 5 and the second transmission member 7. The same applies hereinafter. Refer to Figure 6 When the needle b cannot penetrate, such as a hardness test block, etc., when the placement plate 2 moves relative to the needle plate 4, the needle b impacts the specimen a. During the above operation process, the needle b indirectly applies a force to the pressure sensor 3, so that the pressure sensor 3 measures this force. When the first transmission member 5 and the second transmission member 7 are stationary, they are equivalent to stationary members; when the first transmission member 5 and the second transmission member 7 are moving, they are equivalent to moving members.

[0055] Regarding how the above first transmission member 5 and second transmission member 7 achieve movement, each of the present application provides an optimal technical solution, and other solutions can also be adopted.

[0056] Such as Figure 1 As shown, the first transmission member 5 includes a first power device 501, a first transmission shaft 502, and a worm and worm gear reducer 503. The first power device 501 is arranged on the bracket 1, and the first power device 501 is used to provide power. The first transmission shaft 502 is connected to the first power device 501 through a synchronous belt. The worm of the worm and worm gear reducer 503 is connected to the first transmission shaft 502, and the worm gear of the worm and worm gear reducer 503 is connected to the placement plate 2. Since the placement plate 2 has a certain length, at least one pair of pressure sensors 3 is required to support it. Here, at least one pair of relatively arranged worm and worm gear reducers 503 can be provided, and this pair of worm and worm gear reducers 503 is relatively arranged at both ends of the first transmission shaft 502. The first power device 501 can adopt a servo motor, which can achieve fine movement or rapid rotation to realize the lifting of the pressure sensor 3, that is, the lifting of the placement plate 2.

[0057] As Figure 1 and Figure 2 shown in FIGS. 2 and 3, the second transmission member 7 includes a second guide sleeve 701, a second guide rod 702, a main shaft 703, an eccentric wheel 704 and a second connecting rod 705. The second guide sleeve 701 is fixedly arranged on the bracket 1. The second guide rod 702 is slidably arranged in the second guide sleeve 701, and the second guide sleeve 701 slidably restricts the second guide rod 702. One end of the second guide rod 702 is connected to the fixed beam 6, and the reciprocating movement of the fixed beam 6 is realized through the reciprocating movement of the second guide rod 702. The main shaft 703 is rotatably arranged on the bracket 1, and a synchronous pulley is arranged on the main shaft 703, and the synchronous pulley is connected to the main servo power device 706. In the figure, the main servo power device 706 is connected to the rotating shaft 708 through a coupling 707, a synchronous pulley is arranged on the rotating shaft 708, and the synchronous pulley is connected to the synchronous pulley by a belt. Here, the rotating shaft 708 and the main shaft 703 are arranged in parallel, and the main shaft 703 is arranged on the bracket 1 through a pair of support frames 709. The eccentric wheel 704 is fixedly arranged on the main shaft 703. One end of the second connecting rod 705 is hinged to the second guide rod 702, and the other end of the second connecting rod 705 is hinged to the eccentric wheel 704. The up and down reciprocating movement of the fixed beam 6 is realized by controlling the main servo power device 706.

[0058] When the needle b is withdrawn from the specimen, there is a possibility of taking out the specimen. A peeling plate 9 is designed. The peeling plate 9 is arranged between the placing plate 2 and the needle plate 4. The peeling plate 9 is provided with through holes corresponding to the needle plate 4. The needle b on the needle plate 4 passes through the peeling plate 9 through the through holes, so as to realize blocking the specimen by the peeling plate 9, so as to realize the function of peeling the specimen from the needle b during the process of withdrawing the needle b from the specimen. The peeling plate 9 is arranged on the bracket 1 through a third reciprocating movement mechanism 10. The third reciprocating movement mechanism 10 is fixedly arranged on the bracket 1, and the third reciprocating movement mechanism 10 can be selected as a lifting motor. In use, the peeling plate 9 can move to the specimen before the needle b is withdrawn, and after the withdrawal is completed, the peeling plate 9 can be selectively lifted. The third reciprocating movement mechanism 10 can also adjust the distance between the peeling plate 9 and the placing plate 2 according to different specimens used.

[0059] In order to intelligently test the performance of the needle b, it further includes a display 11, an infrared thermometer 12, an electronic image measuring instrument 13 and an audible and visual alarm 16 respectively connected to the electric control device; the display 11 is arranged on the bracket 1 for display; the infrared thermometer 12 is arranged on the bracket 1 for measuring the temperature of the specimen a needle to be tested; the electronic image measuring instrument 13 is arranged on the bracket 1 for measuring the needle b; the audible and visual alarm 16 is arranged on the bracket 1 and is electrically connected to the pressure sensor, the display and the electric control device respectively for alarming in case of abnormal operation.

[0060] The present invention is provided with an audible and visual alarm 16 on the bracket, and the audible and visual alarm 16 is connected with the pressure sensor and the control cabinet. When the needle plate equipped with the needle is not installed in place and is not aligned with the through hole on the placement plate, the needle is inserted outside the placement plate hole, and the force measured by the pressure sensor will exceed the allowable set value, triggering the audible and visual alarm 16 and the like to issue an alarm, and the electric control cabinet issues an emergency stop command, and the tester automatically stops. When the operator is careless and causes an instruction error, and the needle plate and the support plate are offside and collide with each other in relative reciprocating motion, the pressure measured by the pressure sensor exceeds the allowable set value, the alarm is triggered and an alarm is issued, the electric control cabinet issues an emergency stop command, and the tester automatically stops. When foreign objects are mistakenly inserted between the needle plate, the stripping plate, and the placement plate, the force measured by the pressure sensor will exceed the allowable set value, triggering the audible and visual alarm 16 and an alarm is issued, the electric control cabinet issues an emergency stop command, and the tester automatically stops. These are necessary measures set to protect the needle, the standard test sample cloth and the instrument itself to the maximum extent.

[0061] On the basis of the above, an elastic bending fatigue test device 8 is also designed on the bracket 1. Figure 7 As shown, the elastic bending fatigue testing device 8 includes a fixed platform 801 and a rotating assembly 802. The fixed platform 801 is arranged on the bracket 1, and the fixed platform 801 is used to fix the needle b. The rotating assembly 802 is arranged on the bracket 1, and when the rotating assembly 802 rotates, it provides a swinging arc force for the needle b. The arc force has the following effect: even if the needle b rotates under the action of the arc force, the point of action of the arc force on the needle b remains unchanged as much as possible.

[0062] Regarding the rotating assembly 802, the following scheme can be adopted. The rotating assembly 802 includes a turntable 8021 and a toggle member 8022. The turntable 8021 is arranged on the bracket 1, and the turntable 8021 can be driven by a servo motor or manually. Regarding the shape of the turntable 8021, it can take a variety of forms, such as a circular shape, a rod shape or a fan shape. The toggle member 8022 is fixedly arranged on the turntable 8021, and the toggle member 8022 acts on the needle b. Since the toggle member 8022 needs to contact with the needle b, the contact point of the toggle member 8022, that is, the point of action that contacts with the needle b, is arranged in an arc shape to improve the contact effect of the toggle member 8022 with the needle b during the rotation of the needle b.

[0063] The toggle member 8022 and the clamping block 8011 are respectively arranged on both sides of the needle b. In order to measure the swing of the needle b, the following two reference schemes are designed.

[0064] First, a fixed cavity and a movable cavity intersecting each other are provided in the fixed platform 801, and the two are arranged in a "T-shaped" manner. The fixed cavity is used to fix the needle b, and a conductive rod 803 is provided in the movable cavity in the fixed platform 801. One end of the conductive rod 803 is fixedly connected to one end of the first wire, and the other end is directly opposite to the fixed cavity of the fixed platform 801. The toggle member 8022 is a conductor, and one end of the toggle member 8022 is fixedly connected to one end of the second wire, and the other end of the first wire and the other end of the second wire are respectively connected to the positive and negative poles of the power supply. The function here is that when the toggle member 8022 contacts the needle b, a closed loop can be formed, which is convenient for accurately testing the bending angle of the needle b. On the basis of the above, a compression spring 804 is designed, and the compression spring 804 is arranged in the movable cavity of the fixed platform 801. One end of the compression spring 804 is fixed, and the other end is against the conductive rod 803, so as to ensure that the conductive rod 803 is always in contact with the needle b to form a closed electrical circuit. This scheme is used for electric control measurement.

[0065] Second, a scale plate 805 is designed, which is fixed on a fixed seat, and the extension lines of the scale lines of the scale plate 805 converge at one point, which is the swing point of the needle b fixed on the fixed platform 801. This solution is used for manual measurement.

[0066] When performing a fatigue fracture test on needle b, it is necessary to control the rotating assembly 802 in both clockwise and counterclockwise directions. The present application provides the following design scheme.

[0067] like Figures 8 to 10As shown, the first swing bar 806 is rotatably mounted on the bracket 1, and a pair of straight notches are provided on the first swing bar 806, which are located on both sides of the rotation center of the first swing bar 806, and the first swing bar 806 can swing between D and D1. The second swing bar 807 is rotatably mounted on the turntable 8021, and one end of the second swing bar 807 is connected to the turntable 8021 through a compression spring 8012. Since there is no fixed sleeve on the outer side of the compression spring 8012, when the compression spring 8012 is placed upright, a force is applied to the second swing bar 807, and the second swing bar 807 is extremely easy to rotate. The first push rod 808 is slidably arranged on the bracket 1, one end of the first push rod 808 is arranged in the straight slot of the first swing rod 806 through a pin, and the other end of the first push rod 808 is opposite to the second swing rod 807; the second push rod 809 is slidably arranged on the bracket 1, one end of the second push rod 809 is arranged in the straight slot of the first swing rod 806 through a pin, and the other end of the second push rod 809 is opposite to the second swing rod 807, and the first push rod 808 and the second push rod 809 are respectively arranged on both sides of the rotation center of the first swing rod 806. When the first swing rod 806 is swung, the first push rod 808 and the second push rod 809 will move, and one of them will enter the rotating disk 8021. Similar to the first push rod 808 and the second push rod 809, the third push rod 8010 is slidably arranged in the rotating disk 8021, and one end of the third push rod 8010 is arranged in the straight slot of the second swing rod 807 through a pin. The clamping block 8011 is fixedly disposed at the other end of the third push rod 8010 , and together with the toggle member 8022 respectively toggle the tested needle b to swing back and forth.

[0068] In addition, reference Figure 2 , rollers 14 for placing sample a are arranged on both sides of the placement plate 2, and the rollers 14 are rotatably arranged on the base 15, and the two rollers 14 can serve as retractable wheels for each other. On this basis, the base 15 is slidably arranged on the bracket 1, and can play a role in adjusting the sample a when the width of the sample a is small or a single needle b is tested.

[0069] 1. Selection test of needle b

[0070] When the needle b is selected for testing, it is preferred to first mark the needle b with a code, such as using a laser etching machine or patch; then use the electronic image measuring instrument 13 to measure its dimensions, take pictures and archive them; then determine the test items and test sequence based on the needle b, and set the instructions in the control system, and the instructions are completed. Start the instrument test, control the needle b to reciprocate, and realize its reciprocating insertion and withdrawal in the sample a. The time and frequency information of its movement will be transmitted to the electronic control device, and the pressure sensor 3, the electronic image measuring instrument 13, the display 11 and the infrared thermometer 12 will also transmit the measured information to the electronic control device.

[0071] The needle punching depth is calculated by the distance between the placement plate 2 and the needle plate 4; the needle punching frequency is the frequency of the reciprocating motion of the needle b, which is calculated through the first transmission member 5 and the second transmission member 7; the needle punching step distance is the distance that the specimen a travels during each up and down reciprocating motion, which is calculated from the moving distance of the specimen a and the frequency of the reciprocating motion of the needle b; the needle punching resistance is measured by the pressure sensor 3; the surface temperature of the specimen a, including the ambient temperature and humidity, is measured by the infrared thermometer 12; Infrared thermometer 12: When producing low-melting-point fibers, if heat is generated during the reciprocating friction between the punching needles and the fibers during needle punching, causing the low-melting-point fibers to be in a molten or semi-molten state, it will damage the structure of the low-melting-point fibers, and the molten or semi-molten low-melting-point fibers will also adhere to the needle body, resulting in an increase in the needle punching resistance, making it impossible for the punching needles to entangle the fiber web, and the physical property indicators of the product not meeting the standards, and it is impossible to produce qualified products. The above content and the start and end times of the test are displayed on the display screen 11 outside the electronic control device, and the results can be selectively printed, copied or remotely transmitted. For this test data, the most suitable punching needles for the material of this specimen are preferably selected.

[0072] II. Wear test of the needle b

[0073] When conducting a wear test on the needle b, this needle tester can test a single needle b or multiple needles b of the same model simultaneously, and the test conditions for multiple needles b are the same. The test of the needle b has good repeatability. Because their test procedures, test conditions, and various data have been stored identically, when conducting the same needle test at different times, only the previous test procedure needs to be retrieved from the electronic control device.

[0074] Place the specimen a on the placement plate 2. When the needle punching frequency reaches the set value, the initially measured needle punching force measured by the pressure sensor 3 will be used as the maximum value of the needle punching efficiency and will be displayed and stored. As the test time extends and the number of reciprocating punches of the needle b increases, the tip and barbs of the needle b will wear. At this time, the needle punching force of the needle b will decline, and the entanglement force on the fibers in the specimen will also decrease. At this time, the pressure sensor 3 will transmit the measured data to the electronic control device in real time, and the display screen 11 will automatically generate a line graph and a digital table. When the needle punching force drops to a certain value, such as 50% or more lower than the maximum value, the tester stops the test, and the needles b participating in this wear test are compared one by one through the electronic image measuring instrument 13 for image comparison and data measurement comparison.

[0075] This wear test can use a sand disk instead of the standard specimen a to shorten the wear test time. The sand disk can be made of materials such as metal, plastic, wood, ceramic, glass, and pulp. The test sand is not only traditional sand but also various granular, powdery, and paste-like substances with different mesh numbers that can be used for grinding and polishing. The operation and test method steps are the same as above, and the test results will also be displayed on the screen, and can also be copied to a disk, printed, and transmitted.

[0076] III. Impact Resistance Test of Needle b

[0077] When the impact resistance test of needle b is carried out, other specimens a are moved away, a standard hardness test block is placed on the placement plate 2, the electronic control device is started, and needle b moves down slowly and uniformly with the needle plate 4. When it touches the standard hardness test block, the pressure sensor 3 will transmit the measured force to the electronic control device in real time, and synchronously display the generated linear graph and data chart on the display screen 11. As the pressure between needle b and the standard hardness test block increases, when needle b fails due to increased pressure and breaks, the measured force is the maximum impact resistance of this needle b.

[0078] IV. Resilience Test of Needle b

[0079] Clamp needle b in the fixing cavity of the fixing table 801, and set the bending rotation angle distance, number of times and rotation speed through the touch screen connected to the electronic control device. Press the start key displayed on the touch screen, and the turntable 8021 starts to rotate slowly clockwise. When the toggling piece 8022 touches needle b, the low-voltage safety current is connected to the conductive rod 803 through needle b to form an electrical circuit. At this time, the test system will default this point as the test "zero point" or "starting point". Repeat such an action three times to confirm that the "zero point" is correct. If the zero point values of the three times exceed the allowable error, the test system will automatically stop the next test and display a text prompt on the display screen 11: Please confirm again whether needle b is firmly fixed and whether to continue the test?

[0080] When the operator confirms that needle b is firmly fixed and clicks the next step, the turntable 8021 rotates clockwise according to the preset rotation angle and distance for the resilience test. When performing the resilience test, the rotation speed of the turntable 8021 is stable, slow and uniform. This action can be set to be once or multiple times according to the test rules. When needle b rotates to the set angular distance position, it remains for 3 seconds or more; when the test is completed according to the set requirements, the turntable 8021 returns to a point above point A, the toggling piece 8022 leaves needle b, that is, the current is disconnected; then slowly press down the toggling piece 8022 again. When the slow downward pressure contacts needle b and conducts the current this time, the bending turntable 17 stops rotating and generates a value. The difference between this value and the previously confirmed zero point is the resilience index of this needle b.

[0081] V. Anti-Breaking Angle Test of Needle b

[0082] When the anti-breaking angle test of needle b is carried out, the toggling piece 8022 first determines the "zero point", and the toggling piece 8022 moves slowly in an arc. When the toggling piece 8022 contacts needle b, the current will conduct, and this position is the "zero point". At this time, the toggling piece 8022 continues to press down around the center point O1 until needle b breaks and the current is interrupted, and the toggling piece 8022 stops moving. The value generated at this time is the value of the anti-breaking angle of needle b. It will also be stored and recorded by the instrument to give a linear graph and a data table.

[0083] VI. Bending Fatigue Fracture Test of Needle b

[0084] When the bending fatigue fracture test of needle b is carried out, the toggling member 8022 first confirms the accuracy of the "zero point", and then the first swing rod 806 is driven by the servo motor. The first push rod 808 and the second push rod 809 swing from the center of the first swing rod 806 from the "O point" to the "D point". Under this action, the second push rod 809 moves forward, pushing the clamping block 8011 out of the turntable 8021. Under the action of the compression spring 8012, the clamping block 8011 will not easily displace. After the clamping block 8011 is pushed out, the first swing rod 806 returns to the "O point", and the second push rod 809 retracts to its original position. When the pushed-out clamping block 8011 and the toggling member 8022 form a "jaw", the needle b is clamped in the middle of the "jaw", and the "jaw" makes a reciprocating motion with the "O1 point" of the bending turntable as the center: rotating clockwise to point C and counterclockwise to point C1, repeatedly bending the needle b. The points C, C1 and the number of bends are set according to the test rules. When the needle b fractures due to bending fatigue, the current between the toggling member 8022 and the conductive rod 803 is disconnected, and the test is terminated. The data such as the bending angle, bending frequency and number of bends measured are all stored and recorded. At this time, the first swing rod 806 swings towards the D1 position, driving the first push rod 808 to push forward. The first push rod 808 pushes the front end of one end of the second swing rod 807. The second swing rod 807 swings to the other side under the action of the compression spring 8012. After the other end of the second swing rod 807 drives the clamping block 8011 to retract into the turntable 8021, the first swing rod 806 returns to the "O position".

[0085] Since the needle b needs to swing multiple times to fracture, driving the turntable 8021 by the servo motor can reduce the test time.

[0086] It also includes a display 11, an infrared thermometer 12, an electronic image measuring instrument 13 and an audible and visual alarm 16 respectively connected to the electric control device; the display 11 is arranged on the support 1 for display; the infrared thermometer 12 is arranged on the support 1 for measuring the temperature of the tested sample a needle; the electronic image measuring instrument 13 is arranged on the support 1 for measuring the needle b; the audible and visual alarm 16 is arranged on the support 1 and is electrically connected to the pressure sensor, the display and the electric control device respectively for alarming in case of abnormal operation.

[0087] The device of the present invention can be used only as a test instrument for various performances of various needles, or can also be used for on-line detection of needles used in equipment during the actual production process of non-woven fabrics. The test samples of the present invention can be standard samples, non-woven fabrics made of various fibers or other materials. The electric control device of the present invention is a conventional control device in the numerical control field, and those skilled in the art can flexibly select it according to different test indexes and purposes.

[0088] The present invention is described above with reference to the preferred embodiments, but the protection scope of the present invention is not limited thereto. Various improvements can be made to the embodiments and parts thereof can be replaced with equivalents without departing from the scope of the present invention. As long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way, and any figure mark in the claims should not be regarded as limiting the claims involved. No matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. Therefore, all technical solutions falling within the scope of the claims are within the protection scope of the present invention.

Claims

1. A needle tester, comprising a bracket (1), characterized in that, Also includes: A placement plate (2) for placing the sample (a); A pressure sensor (3), one side of which is fixedly connected to the placement plate (2), and the other side of which is arranged on the bracket (1) via a first transmission member (5); A needle plate (4) for placing needles (b) and arranged on a fixed beam (6), wherein the fixed beam (6) is connected to a second transmission member (7); and an electric control device, arranged on the support (1) and used for controlling the operation of the tester; in, When the placement plate (2) and the needle plate (4) reciprocate relative to each other, the needle (b) is reciprocatedly inserted into and withdrawn from the sample (a); Or, when the placement plate (2) and the needle plate (4) move relative to each other, the needle (b) impacts the sample (a); It also includes an elastic bending fatigue testing device (8) arranged on the bracket (1), which includes: a fixing platform (801), disposed on the support (1) and used for fixing the needle (b); and A rotating assembly (802) is disposed on the support (1), and when the rotating assembly (802) rotates, it provides a swinging arc force for the needle (b); The rotating assembly (802) comprises: A rotating disk (8021) is arranged on the support (1); and A toggle member (8022) is fixedly disposed on the rotating disk (8021) and acts on the needle (b); The fixed platform (801) is provided with a fixed cavity and a movable cavity intersecting each other, the fixed cavity is used to fix the needle (b), and a conductive rod (803) is provided in the movable cavity of the fixed platform (801); one end of the conductive rod (803) is fixedly connected to one end of a first wire, and the other end faces the fixed cavity of the fixed platform (801); the toggle member (8022) is a conductor, one end of the toggle member (8022) is fixedly connected to one end of a second wire, and the other end of the first wire and the other end of the second wire are respectively connected to the positive and negative electrodes of a power source; The elastic bending fatigue testing device (8) further comprises a compression spring (804), wherein the compression spring (804) is arranged in the movable cavity of the fixing platform (801), one end of the compression spring (804) is fixed, and the other end is against the conductive rod (803); The elastic bending fatigue testing device (8) further comprises a scale plate (805), wherein the scale plate (805) is fixedly arranged on the fixed platform (801), and the extension lines of the scale lines of the scale plate (805) converge at a point, which is the swing point of the needle (b) fixed on the fixed platform (801); The elastic bending fatigue testing device (8) also includes: A first swing rod (806) is rotatably mounted on the bracket (1), wherein a pair of straight slots are provided on the first swing rod (806), and the straight slots are located on both sides of the rotation center of the first swing rod (806); A second swing rod (807) is rotatably disposed on the rotating disk (8021), and one end of the second swing rod (807) is connected to the rotating disk (8021) via a compression spring (8012); A first push rod (808) is slidably disposed on the bracket (1), one end of which is disposed in the straight slot of the first swing rod (806) via a pin, and the other end of which is opposite to the second swing rod (807); A second push rod (809) is slidably disposed in the bracket (1), one end of which is disposed in the straight slot of the first swing rod (806) through a pin, and the other end is opposite to the second swing rod (807), and the first push rod (808) and the second push rod (809) are respectively disposed on both sides of the rotation center of the first swing rod (806); A third push rod (8010) is slidably disposed in the rotating disk (8021), and one end of the third push rod is disposed in the straight slot of the second swing rod (807) via a pin; A clamping block (8011) is fixedly arranged at the other end of the third push rod (8010), and together with the toggle member (8022) respectively toggle the needle (b) to swing back and forth; The toggle member (8022) and the clamping block (8011) are respectively arranged on both sides of the needle (b).

2. The needle tester according to claim 1, characterized in that, The first transmission member (5) comprises: A first power device (501), disposed on the support (1) and used to provide power; A first transmission shaft (502) connected to the first power device (501) via a synchronous belt; and A worm gear reducer (503), wherein the worm shaft of the worm gear reducer (503) is connected to the first transmission shaft (502), and the worm shaft of the worm gear reducer (503) is connected to the placement plate (2).

3. The needle tester according to claim 1, wherein The second transmission member (7) comprises: A second guide sleeve (701) is fixedly mounted on the bracket (1); A second guide rod (702) is slidably disposed in the second guide sleeve (701), and one end of the second guide rod is connected to the fixed beam (6); A main shaft (703) is rotatably mounted on the support (1) and connected to a main servo power device 706; an eccentric wheel (704) fixedly mounted on the main shaft (703); and A second connecting rod (705) has one end hingedly connected to the second guide rod (702) and the other end hingedly connected to the eccentric wheel (704).

4. The needle tester according to claim 1, wherein, It also comprises a stripping plate (9), wherein the stripping plate (9) is arranged between the placement plate (2) and the needle plate (4), and the stripping plate (9) is provided with a through hole corresponding to the needle plate (4).

5. The needle tester according to claim 4, characterized in that, The peeling plate (9) is arranged on the bracket (1) through a third reciprocating motion mechanism (10); the third reciprocating motion mechanism (10) is fixedly arranged on the bracket (1); and the third reciprocating motion mechanism (10) is a lifting motor.

6. The needle tester according to claim 4, characterized in that, The needle plate (4) is provided with a needle hole (401), and with the needle hole (401) as the end point, the rays formed by the infinite extension of the sample (a) in the opposite direction of movement do not intersect.

7. The needle tester according to claim 6, characterized in that, The needle plate (4) comprises a base plate (402) and an elastic layer (403) which are connected to each other, and the elastic layer (403) is arranged above the base plate (402).

8. The needle tester according to claim 1, wherein Rollers (14) for placing the sample (A) are provided on both sides of the placement plate (2); the rollers (14) are rotatably arranged on a base (15); and the base (15) is slidably arranged on the bracket (1).

9. The needle tester according to claim 1, characterized in that It further includes a display (11), an infrared thermometer (12), an electronic image measuring instrument (13), and an audible and visual alarm (16) respectively connected to the electric control device; the display (11) is arranged on the bracket (1) for display; the infrared thermometer (12) is arranged on the bracket (1) for measuring the temperature of the needle of the test sample (a); the electronic image measuring instrument (13) is arranged on the bracket (1) for measuring the needle (b); the audible and visual alarm (16) is arranged on the bracket (1) and electrically connected to the pressure sensor, the display, and the electric control device respectively for alarming in case of abnormal operation.

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