Leather tension detection device and method

Abstract

The present invention discloses a leather tension detection device and method, belonging to the field of leather tension detection. A leather tension detection device includes a detection box and a temperature controller, wherein the temperature controller is installed on the top of the detection box, and further includes: two sets of symmetrically arranged guide rails, wherein the guide rails are respectively fixed on the top and bottom of the inner cavity of the detection box, wherein an upper slide plate is slidably connected to both sides of the inner cavity of the upper guide rail, and a lower slide plate is slidably connected to both sides of the inner cavity of the lower guide rail, and a telescopic slide plate is fixedly connected to the top of the lower slide plate; the present invention applies air pressure to the bidirectional telescopic rod to pull the leather in both directions, and in combination with the reading of the barometer, the real-time tension of the leather can be obtained; in addition, in combination with the translation and rotation of the friction roller, friction is applied to the leather to obtain the dynamic tension of the leather, so that the tension performance of the leather can be better grasped, and the representativeness of the detection effect is effectively improved.

Description

Technical Field

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

[0002] Leather tension testing is an important step in evaluating the physical properties of leather. It helps and ensures that the leather can maintain its shape and durability after being made into products. Tension testing can measure the tensile strength, elongation at break, elastic modulus and other properties of leather.

[0003] At present, when testing the tensile strength of leather, a special tensile testing machine is generally used to apply gradually increasing tensile force to the leather sample until the sample breaks, thereby obtaining the maximum tensile strength of the leather under static conditions. However, in actual use, leather products are subject to friction, and the test results under static conditions alone cannot fully represent the true tension performance of the leather. Moreover, leather products are also used in different temperature environments, and the test data obtained under normal temperature is not representative. Therefore, a leather tension testing device and method are proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of insufficient accuracy and representativeness of the detection results obtained in the prior art, and to propose a leather tension detection device and method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A leather tension detection device comprises a detection box and a temperature controller, wherein the temperature controller is installed on the top of the detection box, and further comprises: two sets of symmetrically arranged guide rails, wherein the guide rails are respectively fixed on the top and bottom of the inner cavity of the detection box, wherein an upper slide plate is slidably connected to both sides of the inner cavity of the upper guide rail, and a lower slide plate is slidably connected to both sides of the inner cavity of the lower guide rail, a telescopic slide plate is fixedly connected to the top of the lower slide plate, a clamping part is arranged between the upper and lower symmetrical upper slide plate and the telescopic slide plate, and a pulling part for pushing the upper slide plate to move is arranged at the bottom of the upper guide rail; a friction component, wherein the friction component is arranged in the detection box, and the friction component is used to apply dynamic friction to the leather undergoing tension detection.

[0007] To facilitate clamping, preferably, the clamping part includes a fixed clamping plate and a movable clamping plate, the fixed clamping plate is fixed to the bottom end of the upper slide plate, the movable clamping plate is fixed to the top of the telescopic end of the telescopic slide plate, the side walls of the fixed clamping plate and the movable clamping plate both slide in contact with the inner wall of the detection box, the bottom of the fixed clamping plate is rotatably connected to a threaded rod, the threaded rod passes through the movable clamping plate and is threadedly connected to it, the bottom ends of the threaded rods on both sides are connected through a pulley set, the top of the fixed clamping plate on one side is fixedly connected to a servo motor, and the output shaft of the servo motor is fixedly connected to the top of the threaded rod.

[0008] To facilitate detection, preferably, the pulling part includes a two-way telescopic rod, which is fixed at the bottom of the upper guide rail, and the two ends of the two-way telescopic rod are respectively fixedly connected to the side walls of the upper slide board on both sides, and the top of the detection box is fixedly connected with an air pump, and the output end of the air pump is fixedly connected with an air duct, the other end of the air duct is connected to the inner cavity of the two-way telescopic rod, and a pressure gauge is provided on the air duct.

[0009] In order to improve the detection effect, preferably, the friction assembly includes a reciprocating screw, which is rotatably connected in the detection box, a driving motor is fixedly connected to the outer wall of the detection box, the output shaft of the driving motor is fixedly connected to the end of the reciprocating screw, a movable plate is threadedly sleeved on the reciprocating screw, and multiple groups of symmetrically arranged drive shafts are rotatably connected on the movable plate, and a friction roller is fixedly connected to one end of the drive shaft close to the middle of the detection box, and the spacing between the upper and lower friction rollers of the same group is equal to the thickness of the leather to be tested.

[0010] In order to improve the friction effect, preferably, the other end of the driving shaft is fixedly connected with a driven gear, and two groups of symmetrically arranged driving racks are fixedly connected to the inner wall of the detection box, and the driven gear is meshingly connected with the driving rack.

[0011] In order to facilitate the collection of wear debris, preferably, both sides of the movable plate are fixedly connected with a piston box, a piston push rod is slidably connected in the piston box, the end of the piston push rod away from the piston box is fixedly connected to the inner wall of the detection box, an air suction groove is opened in the movable plate, a plurality of groups of air suction holes are opened on the friction roller at equal intervals, the friction roller is connected with the inner cavity of the drive shaft, the inner cavity of the drive shaft is connected with the inner cavity of the air suction groove, the piston box and the inner cavity of the air suction groove are connected through an air suction pipe, a filter is provided in the end of the air suction pipe connected with the air suction groove, and a one-way valve is provided in the air suction pipe.

[0012] In order to improve the clamping effect, preferably, an inflation groove is opened in the middle part of the fixed clamping plate, the bottom end of the inflation groove is connected with the inner cavity of the detection box, and an elastic airbag is fixedly connected to the bottom of the inner cavity of the inflation groove, the top of the inflation groove is fixed and connected with an inflation tube, the other end of the inflation tube is connected with the inner cavity of the piston box, and a one-way valve is arranged in the inflation tube.

[0013] Furthermore, the top of the piston box is fixed and connected to an exhaust pipe, a one-way valve is arranged in the exhaust pipe, and the pressure required for opening the one-way valve in the exhaust pipe is greater than the pressure required for opening the one-way valve in the inflation pipe.

[0014] In order to facilitate the cleaning of debris, preferably, a slag discharge groove is opened between the inner cavity bottom of the suction groove and the detection box, and a sealing plate is detachably connected to the bottom of the movable plate, and the sealing plate is installed at the output end of the slag discharge groove.

[0015] A leather tension detection method, the steps are as follows:

[0016] Step 1: Fix the leather to be tested;

[0017] Step 2: Apply tension to the fixed leather to complete its static tension test;

[0018] Step 3: Apply friction to the leather to complete its dynamic tension test;

[0019] Step 4: Change the temperature in the test box and test the leather tension under different temperature environments.

[0020] Compared with the prior art, the present invention provides a leather tension detection device and method, which has the following beneficial effects:

[0021] 1. The leather tension detection device applies air pressure to the bidirectional telescopic rod to pull the leather in both directions, and obtains the real-time tension of the leather by reading the barometer. In addition, the friction roller is translated and rotated to apply friction to the leather to obtain the dynamic tension of the leather, so as to better grasp the tension performance of the leather and effectively improve the representativeness of the detection effect.

[0022] 2. The leather tension testing equipment, through the cooperation between the piston box and the piston push rod, can first generate suction around the friction roller during the reciprocating movement of the moving plate, so as to collect the debris generated by friction, thereby improving the cleanliness of the testing box, and can take away the heat generated by friction to avoid the heat from affecting the physical properties of the leather, while reducing heat accumulation and effectively improving the detection accuracy.

[0023] 3. The leather tension detection device, through the cooperation between the piston box and the piston push rod, can continuously inflate the inflation groove, so that the elastic airbag expands and fits tightly with the leather, thereby reinforcing the leather during pulling and improving the stability of leather clamping.

[0024] 4. The leather tension testing equipment changes the testing temperature in the testing box through the temperature controller to obtain the leather tension testing results under different temperature environments, which effectively improves the accuracy of the testing results. In addition, through the airflow generated around the friction roller, the airflow in other areas of the testing box can be quickly supplemented here, thereby speeding up the airflow heat exchange speed, ensuring that the leather can quickly reach the required testing temperature, and improving the testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of a leather tension detection device proposed by the present invention;

[0026] Figure 2 A side structural schematic diagram of a leather tension detection device proposed by the present invention;

[0027] Figure 3 A schematic diagram of the side panel cross-section structure of a leather tension detection device proposed by the present invention Figure 1 ;

[0028] Figure 4 A schematic diagram of the side panel cross-section structure of a leather tension detection device proposed by the present invention Figure 2 ;

[0029] Figure 5 A schematic diagram of the side panel cross-section structure of a leather tension detection device proposed by the present invention Figure 3 ;

[0030] Figure 6 A leather tension detection device proposed by the present invention Figure 5 A schematic diagram of the enlarged structure of the middle A area;

[0031] Figure 7 A schematic diagram of the transverse cross-sectional structure of a testing box of a leather tension testing device proposed by the present invention;

[0032] Figure 8 A schematic diagram of the side panel cross-section structure of a leather tension detection device proposed by the present invention Figure 4 ;

[0033] Fig. 9 This is a schematic diagram of the internal structure of a moving plate of a leather tension detection device proposed by the present invention.

[0034] In the figure: 1. detection box; 2. temperature controller; 3. guide rail; 31. upper slide plate; 32. lower slide plate; 33. telescopic slide plate; 4. fixed clamping plate; 41. moving clamping plate; 42. threaded rod; 43. pulley group; 44. servo motor; 5. two-way telescopic rod; 51. air pump; 52. air guide pipe; 53. barometer; 6. reciprocating screw rod; 61. driving motor; 62. moving plate; 621. suction groove; 622. slag discharge groove; 623. blocking plate; 63. driving shaft; 631. driven gear; 64. friction roller; 641. suction hole; 65. driving rack; 7. piston box; 71. piston push rod; 72. suction pipe; 721. filter screen; 8. charging groove; 81. elastic air bag; 82. charging pipe; 9. exhaust pipe. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] Embodiment 1:

[0038] Reference Figure 1-Figure 9 , a leather tension testing device, comprising a testing box 1 and a temperature controller 2, the temperature controller 2 is installed on the top of the testing box 1, the temperature controller 2 adopts the existing mature technology and is used to change the temperature in the testing box 1, the testing box 1 is plugged with a transparent plate, the transparent plate can be sealed and convenient for observation, and also includes: two sets of symmetrically arranged guide rails 3, the guide rails 3 are respectively fixed on the top and bottom of the inner cavity of the testing box 1, wherein, the upper guide rail 3 is slidably connected with an upper slide 31 on both sides of the inner cavity, and the lower guide rail 3 is slidably connected with a lower slide 32 on both sides of the inner cavity, and the top of the lower slide 32 is fixedly connected with a telescopic slide 33, a clamping part is arranged between the upper and lower symmetrical upper slides 31 and the telescopic slide 33, and a pulling part for pushing the upper slide 31 to move is arranged at the bottom of the upper guide rail 3; a friction component, the friction component is arranged in the testing box 1, and the friction component is used to apply dynamic friction to the leather undergoing tension testing.

[0039] Reference Figure 1-Figure 3The clamping part includes a fixed clamping plate 4 and a movable clamping plate 41, wherein the fixed clamping plate 4 is fixed to the bottom end of the upper slide plate 31, and the movable clamping plate 41 is fixed to the top of the telescopic end of the telescopic slide plate 33. The side walls of the fixed clamping plate 4 and the movable clamping plate 41 are slid in contact with the inner wall of the detection box 1, and the bottom of the fixed clamping plate 4 is rotatably connected to a threaded rod 42, which passes through the movable clamping plate 41 and is threadedly connected thereto. The bottom ends of the threaded rods 42 on both sides are connected by a pulley set 43 for transmission, and a servo motor 44 is fixedly connected to the top of the fixed clamping plate 4 on one side, and the output shaft of the servo motor 44 is fixedly connected to the top of the threaded rod 42.

[0040] Through the arrangement of the above structure, the leather to be tested is flattened and placed between the fixed plates 4 and the movable plates 41 on both sides, and passes through the gap in the middle of the multiple groups of friction rollers 64. Then the servo motor 44 drives the threaded rod 42 to rotate in the forward direction. At this time, the transmission action of the pulley group 43 is cooperated to make the threaded rods 42 on both sides rotate synchronously, so that the movable plates 41 on both sides are close to the fixed plates 4 along the threaded rods 42, and finally the leather is fixed and clamped, ensuring the stability of the leather during testing.

[0041] Reference Figure 1-Figure 6 The tension part includes a bidirectional telescopic rod 5, which is fixed to the bottom of the upper guide rail 3, and the two ends of the bidirectional telescopic rod 5 are respectively fixedly connected to the side walls of the upper slide plate 31 on both sides. An air pump 51 is fixedly connected to the top of the detection box 1, and an air guide tube 52 is fixedly connected to the output end of the air pump 51. The other end of the air guide tube 52 is connected to the inner cavity of the bidirectional telescopic rod 5, and a barometer 53 is arranged on the air guide tube 52; the friction component includes a reciprocating screw 6, which is rotatably connected to the detection box 1, and a driving motor 61 is fixedly connected to the outer wall of the detection box 1. The output shaft of the driving motor 61 is fixedly connected to the end of the reciprocating screw 6, and a movable plate 62 is threadedly sleeved on the reciprocating screw 6. A plurality of groups of symmetrically arranged driving shafts 63 are rotatably connected to the movable plate 62. A friction roller 64 is fixedly connected to one end of the driving shaft 63 close to the middle of the detection box 1, and the spacing between the upper and lower friction rollers 64 of the same group is equal to the thickness of the leather to be tested; the other end of the driving shaft 63 is fixedly connected to a driven gear 631, and two groups of symmetrically arranged driving racks 65 are fixedly connected to the inner wall of the detection box 1, and the driven gear 631 is meshingly connected with the driving rack 65.

[0042] Through the arrangement of the above structure, the air pump 51 is turned on to fill the two-way telescopic rod 5 with gas. Under the action of air pressure, the telescopic ends on both sides of the two-way telescopic rod 5 are simultaneously extended outward, thereby pushing the upper slide plates 31 on both sides to move in opposite directions, thereby applying a tensile force to the leather. At this time, the reading of the barometer 53 is observed to obtain the real-time tension of the leather, thereby completing the static tension detection of the leather; while applying a tensile force to the leather, the drive motor 61 can be turned on to drive the reciprocating screw 6 to rotate, so that the movable plate 62 continuously slides back and forth along the reciprocating screw 6, and at this time, the friction roller 64 slides along the upper and lower surfaces of the leather, thereby applying a friction force to the leather. At the same time, the meshing action of the driven gear 631 and the driving rack 65 is utilized to make the friction roller 64 in the translational sliding rotate, thereby applying a comprehensive friction effect more quickly, thereby effectively improving the detection efficiency; and in summary, the dynamic tension detection of the leather is realized, and the comparison of the two sets of dynamic and static data makes it easier to grasp the tension performance of the leather, thereby effectively improving the representativeness of the detection effect.

[0043] Reference Figure 3 , Figure 4 , Figure 7 and Fig. 9 , wherein, piston boxes 7 are fixedly connected to both sides of the movable plate 62, a piston push rod 71 is slidably connected in the piston box 7, the end of the piston push rod 71 away from the piston box 7 is fixedly connected to the inner wall of the detection box 1, an air suction groove 621 is opened in the movable plate 62, a plurality of groups of air suction holes 641 are evenly spaced on the friction roller 64, the friction roller 64 is connected to the inner cavity of the drive shaft 63, the inner cavity of the drive shaft 63 is connected to the inner cavity of the air suction groove 621, the piston box 7 and the inner cavity of the air suction groove 621 are connected through an air suction pipe 72, a filter screen 721 is arranged in the end of the air suction pipe 72 connected to the air suction groove 621, and a one-way valve is arranged in the air suction pipe 72; a slag discharge groove 622 is opened between the bottom of the inner cavity of the air suction groove 621 and the detection box 1, a sealing plate 623 is detachably connected to the bottom of the movable plate 62, and the sealing plate 623 is installed at the output end of the slag discharge groove 622.

[0044] It should be noted that the one-way valve in the suction pipe 72 can only allow the gas in the suction groove 621 to enter the piston box 7; the setting of the filter screen 721 can intercept the debris carried in the air flow in the suction groove 621, and the cooperation between the slag discharge groove 622 and the sealing plate 623 facilitates the discharge of the debris trapped in the suction groove 621.

[0045] By setting the above structure, during the reciprocating movement of the movable plate 62, the piston box 7 will also slide back and forth along the piston push rod 71. During the process of the piston push rod 71 moving away from the piston box 7, a negative pressure suction effect will be generated in the piston box 7, thereby opening the one-way valve in the suction pipe 72, so that the airflow around the rotating friction roller 64 enters the suction groove 621 along the suction hole 641, the friction roller 64, and the driving shaft 63, so as to collect the debris rubbed off the leather by the friction roller 64, thereby improving the cleanliness of the detection box 1, and with the rapid flow of the airflow, the heat generated by the friction can be taken away, avoiding the influence of the heat on the physical properties of the leather, while reducing heat accumulation, and effectively improving the detection accuracy;

[0046] In addition, in order to further improve the accuracy of the test results, the above-mentioned test steps can be performed on the same batch of leather samples at different temperatures, and the different temperatures are generated by the temperature controller 2, so that the tension performance of the leather can be fully obtained; and in the process of changing the temperature, after the airflow around the friction roller 64 is sucked away, the air pressure around the friction roller 64 will be reduced. At this time, the airflow in other areas of the test box 1 will quickly replenish this place, thereby accelerating the airflow heat exchange speed, ensuring that the leather can quickly reach the required test temperature, and improving the test efficiency.

[0047] Reference Figure 4 , Figure 5 and Figure 8 , wherein, an inflation groove 8 is opened in the middle of the fixed splint 4, the bottom end of the inflation groove 8 is connected with the inner cavity of the detection box 1, and an elastic air bag 81 is fixedly connected to the bottom of the inner cavity of the inflation groove 8, the top of the inflation groove 8 is fixed and connected with an inflation tube 82, the other end of the inflation tube 82 is connected with the inner cavity of the piston box 7, and a one-way valve is arranged in the inflation tube 82; the top of the piston box 7 is fixed and connected with an exhaust pipe 9, the exhaust pipe 9 is provided with a one-way valve, and the pressure required for opening the one-way valve in the exhaust pipe 9 is greater than the pressure required for opening the one-way valve in the inflation tube 82.

[0048] It should be noted that the one-way valve in the inflation tube 82 can only allow the gas in the piston box 7 to enter the inflation groove 8; the one-way valve in the exhaust pipe 9 can only allow the piston box 7 to be discharged into the detection box 1, and only when the gas filled in the inflation groove 8 reaches the maximum amount, the subsequent air pressure in the piston box 7 can open the one-way valve in the exhaust pipe 9.

[0049] Through the arrangement of the above-mentioned structure, when the piston push rod 71 extends into the piston box 7, the gas in the piston box 7 will be squeezed, and the one-way valve in the inflation tube 82 will be opened first, so that the compressed gas will enter the inflation groove 8 along the inflation tube 82. After repeated reciprocating inflation, the elastic airbag 81 will expand and fit tightly with the leather, thereby completing the reinforcement of the leather during pulling and improving the stability of leather clamping. When the gas in the inflation groove 8 is filled to the maximum amount, the gas that continues to be generated in the piston box 7 will open the one-way valve in the exhaust pipe 9 and then flow back to the detection box 1, so as to maintain the air pressure balance in the piston box 7, facilitate continuous air suction, and ensure the cleaning effect; in addition, the airflow output from the exhaust pipe 9 will blow towards the reciprocating screw 6, so as to reduce the heat generated by the reciprocating sliding of the movable plate 62 on the reciprocating screw 6, thereby improving the durability of the movable plate 62 and the reciprocating screw 6.

[0050] Embodiment 2:

[0051] Reference Figure 1-Figure 9 , which is basically the same as the first embodiment, on the basis of the first embodiment, a leather tension detection method is proposed, and the steps are as follows:

[0052] Step 1: Fix the leather to be tested;

[0053] Step 2: Apply tension to the fixed leather to complete its static tension test;

[0054] Step 3: Apply friction to the leather to complete its dynamic tension test;

[0055] Step 4: Change the temperature in the testing box 1 to test the leather tension under different temperature environments.

[0056] Reference Figure 1-Figure 9 In the present invention, when in use, the leather to be tested is flattened and placed between the fixed clamping plates 4 and the movable clamping plates 41 on both sides, and passes through the gap in the middle of the multiple groups of friction rollers 64. Then the servo motor 44 drives the threaded rod 42 to rotate forward. At this time, the transmission action of the pulley group 43 is cooperated to make the threaded rods 42 on both sides rotate synchronously, so that the movable clamping plates 41 on both sides are close to the fixed clamping plates 4 along the threaded rods 42, and finally the leather is fixed and clamped, ensuring the stability of the leather during testing, and then the testing box 1 is closed.

[0057] Then, the air pump 51 is turned on to fill the two-way telescopic rod 5 with gas. Under the action of air pressure, the telescopic ends on both sides of the two-way telescopic rod 5 will extend outward at the same time, thereby pushing the upper slide plates 31 on both sides to move in opposite directions, thereby applying a pulling force to the leather. At this time, the reading of the barometer 53 is observed to obtain the real-time tension of the leather, thereby completing the static tension detection of the leather; in addition, while applying a pulling force to the leather, the drive motor 61 can be turned on to drive the reciprocating screw 6 to rotate, so that the movable plate 62 slides back and forth along the reciprocating screw 6, and the friction roller 64 will slide along the upper and lower surfaces of the leather to apply a friction force to the leather. At the same time, the meshing action of the driven gear 631 and the driving rack 65 is utilized to make the friction roller 64 in the translational sliding rotate, thereby applying a comprehensive friction effect more quickly, thereby effectively improving the detection efficiency; and in summary, the dynamic tension detection of the leather is realized, and the comparison of the two sets of dynamic and static data makes it easier to grasp the tension performance of the leather, thereby effectively improving the representativeness of the detection effect.

[0058] During the reciprocating movement of the movable plate 62, the piston box 7 will also be brought to slide reciprocatingly along the piston push rod 71. During the process of the piston push rod 71 moving away from the piston box 7, a negative pressure suction effect will be generated in the piston box 7, thereby opening the one-way valve in the suction pipe 72, so that the airflow around the rotating friction roller 64 enters the suction groove 621 along the suction hole 641, the friction roller 64, and the driving shaft 63, so as to collect the debris rubbed off the leather by the friction roller 64, thereby improving the cleanliness of the detection box 1, and with the rapid flow of the air flow, the heat generated by the friction can be taken away, thereby preventing the heat from affecting the physical properties of the leather, while reducing heat accumulation, and effectively improving the detection accuracy; and then the airflow entering the suction groove 621, after passing through After being filtered by the filter net 721, it will enter the piston box 7 along the suction pipe 72. When the piston push rod 71 extends into the piston box 7, the gas in the piston box 7 will be squeezed, and the one-way valve in the inflation pipe 82 will be opened first, so that the compressed gas will enter the inflation groove 8 along the inflation pipe 82. After repeated reciprocating inflation, the elastic airbag 81 will expand and fit tightly with the leather, thereby reinforcing the leather during pulling and improving the stability of leather clamping. When the gas in the inflation groove 8 is filled to the maximum amount, the gas that continues to be generated in the piston box 7 will open the one-way valve in the exhaust pipe 9 and then flow back to the detection box 1, so as to maintain the air pressure balance in the piston box 7, facilitate continuous suction, and ensure the cleaning effect.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A leather tension testing device, comprising a testing box (1) and a temperature controller (2), wherein the temperature controller (2) is installed on the top of the testing box (1), characterized in that: Also includes: Two sets of guide rails (3) are symmetrically arranged, wherein the guide rails (3) are respectively fixed to the top and bottom of the inner cavity of the detection box (1). Wherein, an upper slide plate (31) is slidably connected to both sides of the inner cavity of the upper guide rail (3), a lower slide plate (32) is slidably connected to both sides of the inner cavity of the lower guide rail (3), a telescopic slide plate (33) is fixedly connected to the top of the lower slide plate (32), a clamping portion is provided between the upper slide plate (31) and the telescopic slide plate (33) which are symmetrical in the upper and lower parts, and a pulling portion for pushing the upper slide plate (31) to move is provided at the bottom of the upper guide rail (3); A friction component, the friction component is arranged in the testing box (1), and the friction component is used to apply dynamic friction to the leather undergoing tension testing; The friction assembly comprises a reciprocating screw (6), the reciprocating screw (6) being rotatably connected in the detection box (1), a driving motor (61) being fixedly connected to the outer wall of the detection box (1), an output shaft of the driving motor (61) being fixedly connected to the end of the reciprocating screw (6), a moving plate (62) being threadedly sleeved on the reciprocating screw (6), a plurality of groups of symmetrically arranged driving shafts (63) being rotatably connected to the moving plate (62), a friction roller (64) being fixedly connected to one end of the driving shaft (63) close to the middle of the detection box (1), and a spacing between two upper and lower friction rollers (64) of the same group being equal to the thickness of the leather to be tested; Both sides of the movable plate (62) are fixedly connected to a piston box (7), a piston push rod (71) is slidably connected inside the piston box (7), and one end of the piston push rod (71) away from the piston box (7) is fixedly connected to the inner wall of the detection box (1), an air suction groove (621) is provided inside the movable plate (62), a plurality of groups of air suction holes (641) are provided at equal intervals on the friction roller (64), the friction roller (64) is connected to the inner cavity of the drive shaft (63), the inner cavity of the drive shaft (63) is connected to the inner cavity of the air suction groove (621), the piston box (7) and the inner cavity of the air suction groove (621) are connected via an air suction pipe (72), a filter screen (721) is provided inside one end of the air suction pipe (72) connected to the air suction groove (621), and a one-way valve is provided inside the air suction pipe (72).

2. The leather tension detection device according to claim 1, characterized in that: The clamping portion comprises a fixed clamping plate (4) and a movable clamping plate (41), wherein the fixed clamping plate (4) is fixed to the bottom end of the upper slide plate (31), and the movable clamping plate (41) is fixed to the top of the telescopic end of the telescopic slide plate (33). The side walls of the fixed clamping plate (4) and the movable clamping plate (41) are both slidably fitted with the inner wall of the detection box (1), and the bottom of the fixed clamping plate (4) is rotatably connected to a threaded rod (42), and the threaded rod (42) passes through the movable clamping plate (41) and is threadedly connected thereto. The bottom ends of the threaded rods (42) on both sides are transmission-connected via a pulley set (43), and the top of the fixed clamping plate (4) on one side is fixedly connected to a servo motor (44), and the output shaft of the servo motor (44) is fixedly connected to the top of the threaded rod (42).

3. The leather tension detection device according to claim 1, characterized in that: The pulling part comprises a bidirectional telescopic rod (5), the bidirectional telescopic rod (5) being fixed to the bottom of the upper guide rail (3), the two ends of the bidirectional telescopic rod (5) being respectively fixedly connected to the side walls of the upper slide plate (31) on both sides, the top of the detection box (1) being fixedly connected to an air pump (51), the output end of the air pump (51) being fixedly connected to an air guide tube (52), the other end of the air guide tube (52) being connected to the inner cavity of the bidirectional telescopic rod (5), and a pressure gauge (53) being arranged on the air guide tube (52).

4. The leather tension detection device according to claim 1, characterized in that: The other end of the driving shaft (63) is fixedly connected to a driven gear (631), and two groups of symmetrically arranged driving racks (65) are fixedly connected to the inner wall of the detection box (1), and the driven gear (631) is meshingly connected to the driving racks (65).

5. The leather tension detection device according to claim 2, characterized in that: An air filling groove (8) is provided in the middle of the fixed clamping plate (4), the bottom end of the air filling groove (8) is communicated with the inner cavity of the detection box (1), and an elastic air bag (81) is fixedly connected to the bottom of the inner cavity of the air filling groove (8), and an air filling pipe (82) is fixed and communicated with the top of the air filling groove (8), the other end of the air filling pipe (82) is communicated with the inner cavity of the piston box (7), and a one-way valve is arranged in the air filling pipe (82).

6. The leather tension detection device according to claim 5, characterized in that: The top of the piston box (7) is fixed and connected to an exhaust pipe (9), a one-way valve is arranged in the exhaust pipe (9), and the pressure required to open the one-way valve in the exhaust pipe (9) is greater than the pressure required to open the one-way valve in the inflation pipe (82).

7. The leather tension detection device according to claim 2, characterized in that: A slag discharge groove (622) is provided between the inner cavity bottom of the air suction groove (621) and the detection box (1), a sealing plate (623) is detachably connected to the bottom of the movable plate (62), and the sealing plate (623) is installed at the output end of the slag discharge groove (622).

8. A leather tension detection method, using a leather tension detection device as claimed in any one of claims 1 to 7, characterized in that: Here are the steps: Step 1: Fix the leather to be tested; Step 2: Apply tension to the fixed leather to complete its static tension test; Step 3: Apply friction to the leather to complete its dynamic tension test; Step 4: Change the temperature in the testing box (1) to test the leather tension under different temperature environments.

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