Leather tension testing machine

Abstract

The utility model discloses a leather tension testing machine which comprises a workbench, fixing devices are arranged at the left end and the right end of the workbench, a conveying belt is arranged on one side of the top face of the workbench, the fixing device on the right side is fixedly assembled on the top face of the conveying belt, and the fixing device on the left side is fixedly installed on the top face of the workbench and comprises a fixing base, an air cylinder, a pressing block and a base. The fixing base is installed at the upper end of the side of the base, the air cylinder is assembled in the fixing base, a piston rod of the air cylinder is arranged downwards, the tail end of the piston rod of the air cylinder is connected with a pressing block, the pressing block is located above the base, and the pressing block is pressed downwards to make contact with the base so as to be used for pressing and clamping leather. According to the leather tension detection device, the structure is compact, the operation is simple, the first wear-resistant leather and the second wear-resistant leather on the leather tension detection device are tightly attached together through the matching of the first raised line and the second raised line, and the leather is prevented from sideslip or being damaged during tension detection.

Description

Technical Field

[0001] The present invention relates to the technical field of leather, and specifically to a leather tensile testing machine. Background Art

[0002] Leather is made from animal skins through physical or chemical processing methods. During the leather production process, a series of tests need to be carried out on the leather, including performance tests and composition tests, etc. During the performance test process, a tensile testing device is required.

[0003] At present, when some tensile testing machines on the market fix both ends of the leather, they all use fixed clamps to clamp it. There is a rigid contact at the connection between the clamp and the leather. When conducting a tensile test at this contact point, it is very easy to break, making the experimental results worse compared with the actual effect. Summary of the Invention

[0004] The purpose of the present invention is to provide a leather tensile testing machine to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A leather tensile testing machine includes a workbench. Fixed devices are arranged at both the left and right ends of the workbench. A conveyor belt is arranged on one side of the top surface of the workbench. The fixed device on the right is fixedly assembled on the top surface of the conveyor belt, and the fixed device on the left is fixedly installed on the top surface of the workbench. The fixed device includes a fixed seat, a cylinder, a pressing block, and a base. The fixed seat is installed at the upper side of the base. The cylinder is assembled in the fixed seat and the piston rod of the cylinder is arranged downward. The end of the piston rod of the cylinder is connected with the pressing block. The pressing block is located above the base. The pressing block presses down to contact the base for pressing and clamping the leather. The base of the fixed device on the right is connected with the top surface of the conveyor belt. A tensile sensor is connected between at least one cylinder and the fixed seat.

[0006] Further, a first convex strip protrudes upward in the middle of the top surface of the base. First pressing plates are arranged on both sides of the first convex strip. The first pressing plates are detachably connected to the top surface of the base through a plurality of screws. A first wear-resistant leather for contacting the leather to be tested can be clamped between the first convex strip and the two first pressing plates.

[0007] Further, a second convex strip protrudes downward in the middle of the bottom surface of the pressing block. Second pressing plates are arranged on both sides of the second convex strip. The second pressing plates are detachably connected to the bottom surface of the pressing block through a plurality of screws. A second wear-resistant leather for contacting the leather to be tested can be clamped between the second convex strip and the two second pressing plates.

[0008] Further, a tensile sensor is provided between the fixed seat on the left side and the corresponding cylinder.

[0009] Further, a control panel is also provided on the top surface of the workbench, and the processor in the control panel is electrically connected to each cylinder, the tensile sensor, and the conveyor belt motor.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The structure of the present utility model is compact and the operation is simple. Through the cooperation of the first convex strip and the second convex strip, under the action of the cylinder, the first wear-resistant leather and the second wear-resistant leather on it are tightly attached together, preventing the leather from slipping or being damaged during the tensile test. The pulling test is carried out by means of conveyor belt drive, which can avoid the situation of movement caused by vibration during the operation of the machine and improve the test effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the front view of a leather tensile testing machine of the present invention;

[0013] Figure 2 is the top view of a leather tensile testing machine of the present invention;

[0014] Figure 3 is the schematic diagram of the fixing device of a leather tensile testing machine of the present invention.

[0015] In the figure, workbench - 1, conveyor belt - 2, fixed seat - 3, cylinder - 4, pressing block - 5, base - 6, tensile sensor - 7, first convex strip - 8, first pressing plate - 9, first wear-resistant leather - 10, second convex strip - 11, second pressing plate - 12, second wear-resistant leather - 13, control panel - 14, fixing device - 15. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] Such as Figure 1 and Figure 2As shown in the figure, a leather tensile testing machine includes a workbench 1. Fixed devices 15 are provided at both the left and right ends of the workbench 1. A conveyor belt 2 is arranged on one side of the top surface of the workbench 1. The fixed device 15 on the right is fixedly assembled on the top surface of the conveyor belt 2, and the fixed device 15 on the left is fixedly installed on the top surface of the workbench 1. The fixed device 15 includes a fixed seat 3, a cylinder 4, a pressing block 5, and a base 6. The fixed seat 3 is installed at the upper side of the base 6. The cylinder 4 is assembled in the fixed seat 3 and the piston rod of the cylinder 4 is arranged downward. The end of the piston rod of the cylinder 4 is connected with a pressing block 5. The pressing block 5 is located above the base 6. The pressing block 5 presses down to contact the base 6 for pressing and clamping the leather. The base 6 of the fixed device 15 on the right is connected to the top surface of the conveyor belt 2. A tensile sensor 7 is arranged between the fixed seat 3 on the left and the corresponding cylinder 4. A control panel 14 is also arranged on the top surface of the workbench 1. The processor in the control panel 14 is electrically connected to each cylinder 4, the tensile sensor 7, and the motor of the conveyor belt 2.

[0018] Please refer to Figure 3 As shown in the figure, a first convex strip 8 protrudes upward in the middle of the top surface of the base 6. First pressing plates 9 are arranged on both sides of the first convex strip 8. The first pressing plates 9 are detachably connected to the top surface of the base 6 by a plurality of screws. A first wear-resistant leather 10 for contacting the leather to be tested can be clamped between the first convex strip 8 and the first pressing plates 9 on both sides. A second convex strip 11 protrudes downward in the middle of the bottom surface of the pressing block 5. Second pressing plates 12 are arranged on both sides of the second convex strip 11. The second pressing plates 12 are detachably connected to the bottom surface of the pressing block 5 by a plurality of screws. A second wear-resistant leather 13 for contacting the leather to be tested can be clamped between the second convex strip 11 and the second pressing plates 12 on both sides;

[0019] When the pressing block 5 descends for clamping work, the first wear-resistant leather 10 and the second wear-resistant leather 13 respectively contact the upper and lower surfaces of the leather to be tested. By using the first wear-resistant leather 10 and the second wear-resistant leather 13 of the same material as the contact surfaces, it can be avoided that the leather to be tested is worn during the test due to rigid contact. And after using for a period of time, slight wear will inevitably appear on the surfaces of the first wear-resistant leather 10 and the second wear-resistant leather 13. At this time, only need to remove the first pressing plate 9 or the second pressing plate 12 to replace them.

[0020] The working principle of this embodiment is as follows:

[0021] In use, one end of the leather to be tested is placed on the base 6 of the left fixing device 15. Then, the upper cylinder 4 is started, so that the cylinder 4 drives the pressing block 5 to press down to clamp the leather. Then, the other end of the leather is straightened and placed on the base 6 of the right fixing device 15. Similarly, the cylinder 4 drives the pressing block 5 to clamp. During the test, a preset tensile threshold can be input. Then, the conveyor belt 2 starts to work to drive the right fixing device 15 to move to the right, thereby stretching the leather. At this time, the tensile force of the leather will be transmitted to the tensile sensor 7, and the tensile sensor 7 measures the tensile force at this time. When the tensile force reaches the preset threshold, the conveyor belt 2 stops working. The staff can judge the elasticity of the leather by measuring the distance that the right fixing device 15 moves to the right under the same tensile force, or during the test, move the right fixing device 15 to the same position, and judge the elasticity of the leather by measuring the different tensile forces measured by the tensile sensor 7 under the same displacement.

[0022] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A leather tensile testing machine, characterized in that: It includes a workbench, with fixing devices provided at both the left and right ends of the workbench. A conveyor belt is provided on one side of the top surface of the workbench. The fixing device on the right is fixedly assembled on the top surface of the conveyor belt, and the fixing device on the left is fixedly installed on the top surface of the workbench. The fixing device includes a fixing base, a cylinder, a pressing block, and a base. The fixing base is installed at the upper side of the base end. The cylinder is assembled in the fixing base and the piston rod of the cylinder is arranged downward. The end of the piston rod of the cylinder is connected with the pressing block. The pressing block is located above the base. The pressing block presses down to contact the base for clamping and holding the leather tightly. The base of the fixing device on the right is connected with the top surface of the conveyor belt. A tension sensor is connected between at least one cylinder and the fixing base.

2. The leather tensile testing machine according to claim 1, wherein: A first convex strip protrudes upward in the middle of the top surface of the base. First pressing plates are provided on both sides of the first convex strip. The first pressing plates are detachably connected to the top surface of the base by a plurality of screws. A first wear-resistant leather for contacting the leather to be tested can be clamped between the first convex strip and the first pressing plates on both sides.

3. The leather tensile testing machine according to claim 2, characterized in that: A second convex strip protrudes downward in the middle of the bottom surface of the pressing block. Second pressing plates are provided on both sides of the second convex strip. The second pressing plates are detachably connected to the bottom surface of the pressing block by a plurality of screws. A second wear-resistant leather for contacting the leather to be tested can be clamped between the second convex strip and the second pressing plates on both sides.

4. A leather tensile testing machine according to claim 1, characterized in that: A tension sensor is provided between the fixing base on the left and the corresponding cylinder.

5. A leather tensile testing machine according to claim 1, characterized in that: A control panel is further provided on the top surface of the workbench. The processor in the control panel is electrically connected to each cylinder, the tension sensor, and the conveyor belt motor.

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