Tensile strength detection device for leather production

Abstract

The invention discloses a tensile strength detection device for leather production, and belongs to the technical field of tensile detection. A tensile strength detection device for leather production comprises a detection table, a bottom plate fixedly mounted on the detection table, a hollow column and an element box fixedly mounted on the bottom plate, a guide moving mechanism mounted in the hollow column, and at least one pair of clamps, a long groove and a short groove are formed in one side of the hollow column, and supporting parts are slidably mounted in the long groove and the short groove; the clamp is installed on the supporting piece. Wherein the supporting piece located in the long groove is installed on the guide moving mechanism, a tension spring is fixedly connected between the supporting piece located in the short groove and the inner bottom face of the short groove, a contact and a microswitch are installed on the supporting piece and the inner bottom face of the short groove respectively, and the two clamps are driven by the same guide moving mechanism to stretch synchronously. And when any sample is fractured, the microswitch of the fractured part is triggered, fracture information is recorded, and tension is continuously applied to the other sample until the other sample is fractured.

Description

Technical Field

[0001] The present invention relates to the technical field of tensile testing, and in particular to a tensile strength testing device for leather production. Background Art

[0002] As a key material widely used in fields such as footwear, luggage, clothing and automotive interiors, the mechanical properties of leather directly affect the quality and service life of the finished product. Among them, tensile strength is an important indicator to measure the ability of leather to withstand external forces and is one of the key parameters for evaluating the quality of leather.

[0003] In the existing technology, the tensile strength test of leather is usually performed using a universal tensile testing machine in conjunction with a clamp. Often, only one sample can be tested individually, and multiple samples cannot be tested and compared simultaneously under the same experimental conditions. This not only increases experimental time and cost, but may also lead to errors caused by differences in environmental conditions, affecting the comparability and reliability of the results. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that it is impossible to perform synchronous testing and comparative analysis on multiple samples under the same experimental conditions, and to propose a tensile strength testing device for leather production.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A tensile strength testing device for leather production comprises a testing platform, a base plate is fixedly mounted on the testing platform, a hollow column is fixedly mounted on the base plate, the hollow columns are symmetrically arranged, a component box is commonly mounted on one end of the hollow columns away from the base plate, a guide movement mechanism is mounted in the hollow columns, and the device further comprises at least one pair of clamps for fixing the leather sample to be tested; wherein, a long groove and a short groove are provided on one side of the hollow column, support members are slidably mounted in the long groove and the short groove, and the clamps are mounted on the support members; wherein, the support member located in the long groove is mounted on the guide movement mechanism, a tension spring is fixedly connected between the support member located in the short groove and the bottom surface of the short groove, and contacts and micro switches are respectively mounted on the support member and the bottom surface of the short groove.

[0006] In order to ensure that when any sample breaks, the other side can still be subjected to tension until it breaks, preferably, the clamps close to one side of the testing platform are two independent left and right clamps, which can be used to install the leather samples to be tested respectively, and the left and right clamps are slidably connected.

[0007] In order to guide the leather sample to be evenly wound on the clamping plate and reduce the edge breakage caused by excessive local pressure, the clamp further includes a limit block slidably installed in the support member, an installation channel is opened in the limit block, and a clamping plate symmetrically located between the limit blocks, and a rotating shaft is fixedly installed on both sides of the clamping plate, and the rotating shaft is coaxially installed in the installation channel and passes through the installation channel; wherein, a handwheel is fixedly installed on the end of the rotating shaft located outside the limit block.

[0008] In order to ensure that the clamping plate is always in a centered position in the absence of external force, a first mounting groove coaxially arranged with the mounting channel is further provided in the limit block, a positioning ring is fixedly installed on the rotating shaft, and a first spring is fixedly connected between the positioning ring and the inner side wall of the first mounting groove.

[0009] In order to make the push rod receive thrust and drive the clamping arm to clamp the leather, further, the limit block is rotatably installed with an adjusting ring on the side away from the clamping plate, and the adjusting ring is threadedly installed on the rotating shaft. A second mounting groove coaxially arranged with the mounting channel is opened in the limit block, and a connecting seat is fixedly installed on the outer wall of the limit block, and a clamping arm is rotatably installed in the connecting seat, and a push rod is rotatably installed on the clamping arm, and one end of the push rod extends away from the clamping arm into the second mounting groove, and a wedge block is fixedly installed on the rotating shaft, and the wedge block abuts against the inclined surface of the push rod.

[0010] In order to provide axial elastic supporting force and ensure that the positioning pin can automatically reset and maintain the locked state of the clamping arm, further, a third mounting groove is opened on the limit block, and a positioning pin is slidably installed in the third mounting groove, and a second spring is fixedly connected between the positioning pin and the bottom surface of the third mounting groove.

[0011] In order to provide an elastic reset force when the clamping plate is opened and closed, and prevent the clamping force from being too large and causing damage to the sample, the clamping plate further includes circular plate bodies located at both ends, a lower plate body is fixedly installed between the circular plate bodies at both ends, and an upper plate body is slidably installed between the circular plate bodies at both ends, and a clamping cavity is formed between the lower plate body and the upper plate body; wherein, both ends of the opposite surfaces of the lower plate body and the upper plate body are provided with accommodating grooves, and a third spring is fixedly connected between the accommodating grooves.

[0012] In order to provide flexible clamping pressure, it is particularly suitable for clamping soft, thin or special-shaped leather samples. Furthermore, an airbag is fixedly installed on one side of the lower plate body close to the upper plate body, and an air flow channel connected to the airbag is opened in the lower plate body, and a valve is installed in the air flow channel.

[0013] In order to achieve precise stretching control of the clamp, preferably, the guide movement mechanism includes a guide rod fixedly installed in the hollow column on one side, and a screw rotatably installed in the hollow column on the other side. A motor is fixedly installed in the component box, and the output end of the motor is connected to the screw transmission.

[0014] In order to record the puncture parameters of the leather, a tensioning splint is slidably installed on the component box for tensioning the leather to be tested; a circular groove running through the front and back is provided on the tensioning splint, and the circular groove is symmetrically arranged; a constraint channel is provided on the component box, and a loading head is fixedly installed on the circular plate body; the circular groove, the constraint channel and the loading head are coaxially arranged.

[0015] Compared with the prior art, the present invention provides a tensile strength testing device for leather production, which has the following beneficial effects: 1. This tensile strength testing device for leather production, when testing a single leather sample, clamps one end of the leather sample between two independent clamps at the bottom, merging the two independent clamps into a unified clamping interface. The upper clamp is driven upward by a guide movement mechanism to achieve tensile loading. During loading, the lower clamp moves a certain distance within the short slot until it abuts the inner wall of the short slot. When the sample breaks, the lower clamp loses tension and rapidly slides down, triggering a microswitch, which automatically records the break time, tension value, and elongation. When testing two leather samples, two leather samples from different batches or with different processing processes can be clamped in two independent clamps, respectively. The same guide movement mechanism drives the two clamps to stretch synchronously. When either sample breaks, the microswitch on the broken side is triggered, recording the fracture information, and tension is continued to be applied to the other sample until it breaks. Whether for single leather samples or for comparative testing of two samples, this device provides excellent clamping stability and data acquisition capabilities. 2. This tensile strength testing device for leather production places the leather sample to be tested in a clamping cavity formed by a lower plate and an upper plate. The upper plate, under the elastic force of a third spring, presses the sample downward. The air valve is opened to inflate the airbag, causing it to expand and fit against the sample surface, enhancing clamping friction. The air valve is closed to maintain the airbag in a pressurized state. The third spring in the clamping cavity automatically adjusts the distance between the upper and lower plates according to the thickness of the sample. The airbag expands and deforms according to the shape of the sample, achieving uniform contact and preventing stress concentration. For thicker or harder samples, the airbag pressure can be reduced to avoid over-clamping. For thinner or softer samples, the airbag pressure is increased to enhance clamping stability. 3. This tensile strength testing device for leather production cuts the leather to be tested into appropriate sizes and places it between the circular grooves in the middle of the tensioning plywood. The tensioning plywood is adjusted to ensure that the leather sample is evenly tensioned. The guide movement mechanism is activated, and the motor drives the lead screw to rotate. The circular plate drives the loading head to move upward along the constraint channel. The loading head gradually approaches and eventually punctures the tensioned leather sample. During the test, the resistance change curve of the loading head is recorded in real time, and key parameters such as the maximum puncture force, puncture energy, and puncture depth are automatically identified. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a tensile strength testing device for leather production proposed by the present invention; Figure 2 This is a schematic diagram of the installation structure of the guide movement mechanism of the tensile strength testing device for leather production proposed by the present invention; Figure 3 This is a schematic diagram of the upper clamp structure of a tensile strength testing device for leather production proposed by the present invention; Figure 4 This is a schematic diagram of the lower clamp structure of a tensile strength testing device for leather production proposed by the present invention; Figure 5 This is a schematic diagram of the internal structure of a limit block of a tensile strength testing device for leather production proposed by the present invention; Figure 6 This is a schematic diagram of the structure of a clamping plate of a tensile strength testing device for leather production proposed by the present invention; Figure 7 This is a schematic diagram of the micro switch structure of a tensile strength detection device for leather production proposed by the present invention; Figure 8 This is a schematic diagram of the tensioning splint structure of a tensile strength testing device for leather production proposed by the present invention.

[0017] In the figure: 1. Testing table; 2. Base plate; 3. Hollow column; 301. Long slot; 302. Short slot; 4. Component box; 401. Constraint channel; 5. Guide movement mechanism; 501. Guide rod; 502. Lead screw; 503. Motor; 6. Clamp; 601. Limit block; 6011. Mounting channel; 6012. First mounting slot; 6013. Second mounting slot; 6014. Third mounting slot; 602. Clamping plate; 6021. Circular plate; 6022. Lower plate; 6023. Upper plate; 6024. Accommodating groove; 6025. Third spring; 6026. Air flow channel; 603. Rotating shaft; 604. Handwheel; 605. Positioning ring; 606. First spring; 607. Adjusting ring; 608. Connecting seat; 609. Clamping arm; 610. Push rod; 611. Wedge block; 612. Positioning pin; 613. Second spring; 614. Air bag; 10. Support member; 7. Tension spring; 8. Contact; 9. Micro switch; 11. Tensioning splint; 1101. Circular groove; 12. Loading header. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0020] Example 1: Reference Figure 1-8 A tensile strength testing device for leather production includes a testing platform 1, a base plate 2 is fixedly mounted on the testing platform 1, a hollow column 3 is fixedly mounted on the base plate 2, the hollow columns 3 are symmetrically arranged, a component box 4 is commonly mounted on one end of the hollow columns 3 away from the base plate 2, a guide moving mechanism 5 is installed in the hollow columns 3, and at least one pair of clamps 6 is included for fixing the leather sample to be tested. There are three clamps 6, specifically, the clamps 6 close to one side of the testing platform 1 are two independent left and right clamps 6, which can be used to install the leather samples to be tested respectively, and the left and right clamps 6 are slidably connected to realize the synchronous testing of two samples.

[0021] The guide moving mechanism 5 is used to drive the clamp 6 to perform uniform stretching operation and control the stretching speed and displacement accuracy. Specifically, the guide moving mechanism 5 includes a guide rod 501 fixedly installed in the hollow column 3 on one side, and a screw 502 rotatably installed in the hollow column 3 on the other side. A motor 503 is fixedly installed in the component box 4, and the output end of the motor 503 is transmission-connected to the screw 502. When working, the motor 503 drives the screw 502 to rotate, driving the slider threadedly connected to it to move, thereby realizing precise stretching control of the clamp 6.

[0022] Specifically, a long slot 301 and a short slot 302 are provided on one side of the hollow column 3 , and the two are collinear. Support members 10 are slidably installed in the long slot 301 and the short slot 302 , and the clamp 6 is installed on the support member 10 .

[0023] Specifically, the support member 10 located in the long slot 301 is installed on the guide moving mechanism 5 and is controlled by the motor 503. A tension spring 7 is fixedly connected between the support member 10 located in the short slot 302 and the bottom surface of the short slot 302 to provide a reset force. Contacts 8 and micro switches 9 are respectively installed on the support member 10 and the bottom surface of the short slot 302. When the clamp 6 suddenly slides down after the sample breaks, the micro switch 9 is triggered to form a fracture signal feedback, which is used to automatically record the fracture time, tension value and elongation.

[0024] The present invention provides a tensile strength testing device for leather production. When testing a single sample of leather, the total length of the sample is about 200 mm, the gauge section length is about 25 mm, and the width is about 15-22 mm. One end of the leather sample is clamped between two independent clamps 6 below, so that the two independent clamps 6 are merged into a unified clamping interface. The upper clamp 6 is driven upward by the guide moving mechanism 5 to achieve tensile loading. During the loading process, the lower clamp 6 will move a certain distance in the short groove 302 until it abuts against the inner wall of the short groove 302. When the sample breaks, the lower clamp 6 slides down rapidly due to the loss of tension, triggering the micro switch 9, thereby automatically recording the breaking time, tension value and elongation.

[0025] When testing two leather samples, the total length of the samples is about 200 mm, the gauge length is about 25 mm, and the width is about 8-12 mm. Two leather samples from different batches or processed by different processes can be clamped in two independent clamps 6 respectively, and the two clamps 6 are driven to stretch synchronously by the same set of guiding moving mechanisms 5. When any sample breaks, the micro switch 9 of the broken side is triggered, the fracture information is recorded, and tension is continued to be applied to the other sample until it breaks.

[0026] Whether it is for a single leather sample or a double sample comparison test, the device can provide good clamping stability and data collection capabilities.

[0027] Example 2: The tensile strength detection device provided in Example 1 is further optimized, referring to Figure 3 and Figure 5 The clamp 6 includes a limit block 601 slidably installed in the support member 10, an installation channel 6011 is opened in the limit block 601, and a clamping plate 602 located between the symmetrical limit blocks 601, and a rotating shaft 603 is fixedly installed on both sides of the clamping plate 602, and the rotating shaft 603 is coaxially installed in the installation channel 6011 and passes through the installation channel 6011.

[0028] Specifically, a handwheel 604 is fixedly mounted on one end of the rotating shaft 603 outside the limiting block 601 .

[0029] Through the arrangement of the above structure, one end of the leather is clamped in the clamping plate 602, and the hand wheels 604 at both ends are rotated to guide the leather sample to be evenly wrapped around the clamping plate 602. The rotation action creates a multi-point contact and wrapping effect between the leather sample and the clamping plate 602, thereby increasing the effective clamping area, preventing the sample from slipping, and reducing edge breakage caused by excessive local pressure.

[0030] Referring to the figure, a first installation groove 6012 is provided in the limit block 601 and is coaxial with the installation channel 6011 . A positioning ring 605 is fixedly installed on the rotating shaft 603 . A first spring 606 is fixedly connected between the positioning ring 605 and the inner side wall of the first installation groove 6012 .

[0031] Through the setting of the above structure, the first springs 606 on both sides work together to ensure that the clamping plate 602 is always in the center position without external force. Even during multiple clamping processes, the clamping plate 602 can quickly return to the initial position to facilitate subsequent operations.

[0032] Referring to the figure, an adjusting ring 607 is rotatably installed on the side of the limit block 601 facing away from the clamping plate 602, and the adjusting ring 607 is threadedly installed on the rotating shaft 603. The position of the limit block 601 can be fine-tuned by rotating the adjusting ring 607. A second mounting groove 6013 coaxially arranged with the mounting channel 6011 is provided in the limit block 601. A connecting seat 608 is fixedly installed on the outer wall of the limit block 601, and a clamping arm 609 is rotatably installed in the connecting seat 608. A push rod 610 is rotatably installed on the clamping arm 609, and one end of the push rod 610 extends away from the clamping arm 609 into the second mounting groove 6013. A wedge block 611 is fixedly installed on the rotating shaft 603, and the wedge block 611 abuts against the inclined surface of the push rod 610.

[0033] Furthermore, a third mounting groove 6014 is provided on the limit block 601, and a positioning pin 612 is slidably installed in the third mounting groove 6014. A second spring 613 is fixedly connected between the positioning pin 612 and the bottom surface of the third mounting groove 6014 to provide axial elastic support force to ensure that the positioning pin 612 can automatically reset and maintain the locking state of the clamping arm 609.

[0034] Through the arrangement of the above structure, the adjusting rings 607 on both sides are rotated to squeeze the limit block 601 inward, so that the limit block 601 moves in the support member 10. When the push rod 610 abuts against the wedge block 611 on the rotating shaft 603, the push rod 610 is pushed and drives the clamping arm 609 to clamp the leather.

[0035] Example 3: The tensile strength testing device provided in Example 2 is further optimized, referring to Figure 6 The clamping plate 602 includes circular plate bodies 6021 at both ends, a lower plate body 6022 is fixedly installed between the circular plate bodies 6021 at both ends, and an upper plate body 6023 is slidably installed between the circular plate bodies 6021 at both ends, and the surface is provided with anti-slip grooves or a flexible covering layer. A clamping cavity is formed between the lower plate body 6022 and the upper plate body 6023 for accommodating the leather sample to be tested.

[0036] Specifically, both ends of the opposite surfaces of the lower plate body 6022 and the upper plate body 6023 are provided with a receiving groove 6024, and a third spring 6025 is fixedly connected between the relative receiving grooves 6024 to provide elastic reset force when the clamping plate 602 is opened and closed, thereby preventing the sample from being damaged due to excessive clamping force.

[0037] Furthermore, an airbag 614 is fixedly installed on one side of the lower plate body 6022 close to the upper plate body 6023 for providing flexible clamping pressure, which is particularly suitable for clamping soft, thin or special-shaped leather samples. An air flow channel 6026 connected to the airbag 614 is opened in the lower plate body 6022 for supplying compressed air to the airbag 614 or releasing gas. A valve is installed in the air flow channel 6026 for controlling the inflation and deflation state of the airbag 614.

[0038] Through the arrangement of the above structure, the leather sample to be tested is placed in the clamping cavity formed by the lower plate 6022 and the upper plate 6023. The upper plate 6023 is pressed downward by the elastic force of the third spring 6025. The air valve is opened and the airbag 614 is inflated to expand and fit the surface of the sample to enhance the clamping friction. The air valve is closed to keep the airbag 614 in a pressurized state. The third spring 6025 in the clamping cavity can automatically adjust the distance between the upper and lower plates according to the thickness of the sample. The airbag 614 expands and deforms according to the shape of the sample to achieve uniform contact and prevent stress concentration. For thicker or harder samples, excessive clamping can be avoided by reducing the pressure of the airbag 614. For thinner or softer samples, the pressure of the airbag 614 is increased to enhance the clamping stability.

[0039] Example 4: The tensile strength detection device provided in the above embodiment is further optimized, referring to Figure 1 and Figure 8 A tensioning splint 11 is slidably installed on the component box 4 for tensioning the leather to be tested; a circular groove 1101 is provided on the tensioning splint 11 and passes through the front and back, and the circular grooves 1101 are symmetrically arranged. A constraint channel 401 is provided on the component box 4, and a loading head 12 is fixedly installed on the circular plate body 6021. The constraint channel 401 is used to limit the movement trajectory of the loading head 12 to ensure that it moves along a preset path. The circular groove 1101, the constraint channel 401 and the loading head 12 are coaxially arranged to ensure that the direction of force transmission is accurate.

[0040] Through the arrangement of the above structure, the leather to be tested is cut into an appropriate size and placed between the circular groove 1101 in the middle of the tensioning splint 11. The tensioning splint 11 is adjusted so that the leather sample is in a uniform tensioned state. The guide moving mechanism 5 is started, the motor 503 drives the screw 502 to rotate, and the circular plate body 6021 drives the loading head 12 to move upward along the direction of the constraint channel 401. The loading head 12 gradually approaches and finally punctures the leather sample in the tensioned state. During the test, the resistance change curve of the loading head 12 is recorded in real time, and key parameters such as the maximum puncture force value, puncture energy, and puncture depth are automatically identified.

[0041] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A tensile strength testing device for leather production, comprising a testing table (1), characterized in that: The inspection table (1) is fixedly mounted with a base plate (2), and a hollow column (3) is fixedly mounted on the base plate (2). The hollow columns (3) are symmetrically arranged, and a component box (4) is mounted on one end of the hollow columns (3) away from the base plate (2). A guide movement mechanism (5) is mounted inside the hollow columns (3). At least one pair of clamps (6) for fixing the leather sample to be tested; Wherein, a long groove (301) and a short groove (302) are provided on one side of the hollow column (3), a support member (10) is slidably installed in each of the long groove (301) and the short groove (302), and the clamp (6) is installed on the support member (10); The support member (10) located in the long slot (301) is mounted on the guide movement mechanism (5), a tension spring (7) is fixedly connected between the support member (10) located in the short slot (302) and the bottom surface of the short slot (302), and a contact (8) and a micro switch (9) are respectively mounted on the support member (10) and the bottom surface of the short slot (302).

2. The tensile strength testing device for leather production according to claim 1, characterized in that: The fixture (6) close to one side of the testing platform (1) is composed of two independent left and right fixtures (6), which can be respectively mounted with leather samples to be tested, and the left and right fixtures (6) are slidably connected to each other.

3. The tensile strength testing device for leather production according to claim 2, characterized in that: The clamp (6) comprises a limit block (601) slidably mounted in the support member (10), a mounting channel (6011) is provided in the limit block (601), and A clamping plate (602) is located between the symmetrical limit blocks (601), and a rotating shaft (603) is fixedly installed on both sides of the clamping plate (602). The rotating shaft (603) is coaxially installed in the installation channel (6011) and passes through the installation channel (6011); A handwheel (604) is fixedly mounted on one end of the rotating shaft (603) located outside the limiting block (601).

4. The tensile strength testing device for leather production according to claim 3, characterized in that: A first mounting groove (6012) coaxially arranged with the mounting channel (6011) is provided in the limiting block (601), a positioning ring (605) is fixedly mounted on the rotating shaft (603), and a first spring (606) is fixedly connected between the positioning ring (605) and the inner side wall of the first mounting groove (6012).

5. The tensile strength testing device for leather production according to claim 4, characterized in that: An adjusting ring (607) is rotatably mounted on the side of the limit block (601) away from the clamping plate (602), and the adjusting ring (607) is threadedly mounted on the rotating shaft (603). A second mounting groove (6013) coaxially arranged with the mounting channel (6011) is provided in the limit block (601). A connecting seat (608) is fixedly mounted on the outer wall of the limit block (601), a clamping arm (609) is rotatably mounted in the connecting seat (608), and a push rod (610) is rotatably mounted on the clamping arm (609). An end of the push rod (610) away from the clamping arm (609) extends into the second mounting groove (6013), and a wedge block (611) is fixedly mounted on the rotating shaft (603), and the wedge block (611) abuts against the inclined surface of the push rod (610).

6. The tensile strength testing device for leather production according to claim 5, characterized in that: A third installation slot (6014) is provided on the limiting block (601), a positioning pin (612) is slidably installed in the third installation slot (6014), and a second spring (613) is fixedly connected between the positioning pin (612) and the bottom surface of the third installation slot (6014).

7. The tensile strength testing device for leather production according to claim 3, characterized in that: The clamping plate (602) comprises circular plates (6021) at both ends, a lower plate (6022) is fixedly installed between the circular plates (6021) at both ends, and An upper plate body (6023) is slidably mounted between the circular plate bodies (6021) at both ends, and a clamping cavity is formed between the lower plate body (6022) and the upper plate body (6023); Wherein, both ends of the opposite surfaces of the lower plate body (6022) and the upper plate body (6023) are provided with accommodating grooves (6024), and a third spring (6025) is fixedly connected between the accommodating grooves (6024).

8. The tensile strength testing device for leather production according to claim 7, characterized in that: An air bag (614) is fixedly mounted on one side of the lower plate (6022) close to the upper plate (6023), and an air flow channel (6026) communicating with the air bag (614) is provided in the lower plate (6022), with a valve installed in the air flow channel (6026).

9. The tensile strength testing device for leather production according to claim 1, characterized in that: The guide movement mechanism (5) comprises a guide rod (501) fixedly mounted in the hollow column (3) on one side, and A lead screw (502) is rotatably mounted in the hollow column (3) on the other side, and a motor (503) is fixedly mounted in the component box (4), with an output end of the motor (503) being transmission-connected to the lead screw (502).

10. The tensile strength testing device for leather production according to claim 7, characterized in that: A tensioning clamp (11) is slidably mounted on the component box (4) for tensioning the leather to be tested; The tensioning clamp (11) is provided with a circular groove (1101) that passes through from front to back, and the circular groove (1101) is symmetrically arranged. The component box (4) is provided with a constraint channel (401), and a loading head (12) is fixedly mounted on the circular plate body (6021). The circular groove (1101), the constraint channel (401) and the loading head (12) are coaxially arranged.

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