Fully automatic fabric tearing instrument and tearing strength test method thereof

Abstract

The present invention relates to the technical field of tearing instruments, and in particular to a fully automatic fabric tearing instrument and a tearing strength test method thereof, wherein the fully automatic fabric tearing instrument comprises a control system, a box swing device, a clamping device, a cutting device, a range adjustment device, a positioning release device, a swing arm reset device and a swing measuring device. Beneficial effects: The range can be automatically adjusted, which is convenient and quick. The calibration of the tearing instrument can be achieved by setting a balancing screw and a balancing weight; a swing arm reset device is set to achieve automatic return of the heavy hammer, and the automated cutting device is more efficient and accurate. The equipment comes with a printer, and the test report can be output through the printer. A positioning release device is set, and the first swing arm is automatically fixed after returning to its position. The structure is reasonable, the test accuracy is high, the automation level is high, the function is powerful, and the performance is reliable.

Description

Technical Field

[0001] The invention relates to the technical field of tearing instruments, in particular to a full-automatic fabric tearing instrument and a tearing strength testing method thereof. Background Art

[0002] The tearing performance of textiles refers to the force required to tear a fabric sample under specified conditions. The textile impact pendulum method is a commonly used measurement method. The potential energy consumed by the fixed pendulum when tearing the sample is detected by an encoder, and the average strength of the sample's resistance to tearing is indirectly determined. The existing fabric tearing instrument has a small range, generally 64N-128N, which cannot meet the measurement needs of a larger range; secondly, it is necessary to manually replace weights of different weights to change the mass of the pendulum and then adjust the range, which is cumbersome to operate; finally, the pendulum needs to be manually returned to its position, and the degree of automation is low, so there is room for improvement. Summary of the invention

[0003] In order to overcome the technical defects of the prior art that the measuring range needs to be manually adjusted and the operation is inconvenient, the present invention provides a fully automatic fabric tearing instrument, including a control system and a box, and the fully automatic fabric tearing instrument also includes:

[0004] The swing device comprises a swing shaft rotatably connected to the box body, one end of the swing shaft extends out of the box body, a first swing arm is arranged on the shaft body of the swing shaft located in the box body, and a second swing arm is arranged on the end of the swing shaft located outside the box body;

[0005] The clamping device comprises a movable clamp and a fixed clamp, wherein the fixed clamp is fixed on the box body, and the movable clamp is fixed on the second swing arm;

[0006] A cutting device, fixed on the box below the clamping device;

[0007] The range adjustment device comprises an adjustment screw, an adjustment motor and a slide rod, wherein the slide rod is fixed on the first swing arm, the adjustment motor is fixed on the swing shaft, one end of the adjustment screw rod is rotatably connected to the adjustment motor, and the other end of the adjustment screw rod is fixed to the first swing arm through a first bearing seat, the axial directions of the slide rod and the adjustment screw rod are parallel to the first swing arm, a weight is threadedly connected to the adjustment screw rod, and the weight is slidably connected to the slide rod;

[0008] A positioning release device is arranged on the box body and is clamped with the first swing arm;

[0009] The swing shaft is provided with a swing measuring device, and the clamping device, cutting device, positioning release device, regulating motor, swing arm resetting device and swing measuring device are all electrically connected to the control system.

[0010] Furthermore, a gap is provided between the fixed clamp and the movable clamp, the cutting device comprises a cutter and a cutting power assembly, the cutter is fixed on the cutting power assembly, the cutting power assembly is fixed on the box body, and the cutter is placed in the gap between the fixed clamp and the movable clamp.

[0011] Furthermore, the swing shaft includes a middle portion and end portions located on both sides of the middle portion, the middle portion is provided with a through hole, the weight can pass through the through hole, and the two end portions are fixed to the box body through a front bearing seat and a rear bearing seat respectively.

[0012] Furthermore, a through-hole slip ring is sleeved on the swing shaft, the inner ring of the through-hole slip ring is fixed on the swing shaft, and a positioning block is provided on the outer ring of the through-hole slip ring, and the positioning block is clamped on the box body through a positioning rod.

[0013] Furthermore, travel switches are provided at both ends of the first swing arm, and a position sensor is provided at one end of the first swing arm close to the weight, and the travel switch and the position sensor are electrically connected to a control system.

[0014] Furthermore, a zero position calibration component is provided on the first swing arm.

[0015] Furthermore, the positioning and releasing device includes a releasing cylinder, which is fixed at the top of the inner surface of the box body. A positioning plate is provided on the first swing arm, and a positioning hole is provided on the positioning plate. The output end of the releasing cylinder can be snapped into the positioning hole. A metal sensor for sensing the position of the first swing arm is provided on the box body, and the metal sensor and the releasing cylinder are both electrically connected to the control system.

[0016] Furthermore, a swing arm reset device is provided on the swing shaft, and the swing arm reset device includes a reset motor, an electromagnetic clutch, a first bevel gear and a second bevel gear, the first bevel gear and the second bevel gear are meshed with each other, the electromagnetic clutch is sleeved on the swing shaft, the first bevel gear is connected to the electromagnetic clutch, the second bevel gear is transmission connected to the reset motor, and the reset motor is fixed on the box.

[0017] Furthermore, the swing measuring device includes a synchronous wheel fixed on the swing shaft, the synchronous wheel is connected to a driven wheel via a transmission belt, the driven wheel is connected to an encoder via a synchronous shaft, and the synchronous shaft is fixed to the box body via a second bearing seat.

[0018] A second aspect of the present invention provides a tear strength testing method, comprising the following steps:

[0019] S10, calibration, the control system controls the weight to return to zero, at which point the weight corresponds to a range of 0N;

[0020] S20, setting the measuring range, the adjusting motor drives the adjusting screw to rotate, and drives the weight to move along the sliding rod. According to the lever principle, the position of the weight on the first swing arm changes, and the potential energy of the weight changes accordingly. Different measuring ranges are set by changing the potential energy of the weight.

[0021] S30, sample detection, placing the sample on the clamping device, the clamping device automatically clamps, the cutting device automatically cuts a small hole on the sample, the positioning release device releases the first swing arm, the first swing arm rotates around the swing axis, the swing measuring device detects the potential energy of the first swing arm at this time, and the swing arm resetting device drives the swing arm to return to its position;

[0022] S40, the control system obtains the residual potential energy of the weight after the sample is torn, calculates the energy consumed in tearing the sample, thereby obtaining the force required for tearing the sample, and then outputs the test data.

[0023] To sum up, the beneficial effects of the present invention are: the weight is driven to move by adjusting the lead screw, and according to the lever principle, the force generated by the weight at different positions of the first swing arm is different, thereby realizing the automatic adjustment of the range, which is convenient and quick; secondly, a travel switch is arranged on the first swing arm to prevent the weight from exceeding the limit position and damaging the instrument, and a position sensor is arranged on the first swing arm to sense the position of the weight, and to obtain the maximum range corresponding to the weight at this time, so as to realize real-time regulation of the range; by setting a balancing screw and a balancing weight, the tearing instrument can be calibrated; compared with the prior art, the range is larger, which can reach 300N. At the same time, a swing arm resetting device is arranged to realize automatic return of the weight, and the automated cutting device is more efficient and accurate. The equipment has its own printer, and the test report can be output through the printer. A positioning release device is arranged, and the first swing arm is automatically fixed after returning. It has a reasonable structure, high test accuracy, high degree of automation, powerful functions and reliable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of the fully automatic fabric tearing instrument of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the fully automatic fabric tearing instrument of the present invention.

[0026] Figure 3 Schematic diagram of the internal structure of the fully automatic fabric tearing instrument of the present invention (viewing angle 1).

[0027] Figure 4 Schematic diagram of the internal structure of the fully automatic fabric tearing instrument of the present invention (viewing angle 2).

[0028] Figure 5 It is a structural schematic diagram of the positioning and releasing device of the full-automatic fabric tearing instrument of the present invention.

[0029] Figure 6It is a schematic structural diagram of the cutting device of the fully automatic fabric tearing instrument of the present invention.

[0030] Figure 7 It is a schematic diagram of the structure of the swing shaft of the fully automatic fabric tearing instrument of the present invention.

[0031] Figure 8 It is a schematic diagram of the structure of the weight of the fully automatic fabric tearing instrument of the present invention.

[0032] Description of reference numerals:

[0033] 1. Box; 2. Swing device; 3. Swing shaft; 4. First swing arm; 5. Second swing arm; 6. Clamping device; 7. Moving fixture; 8. Fixed fixture; 9. Cutting device; 11. Adjusting motor; 12. Adjusting screw rod; 13. First bearing seat; 14. Heavy hammer; 15. Positioning release device; 16. Swing arm reset device; 18. Cutter; 19. Cutting power assembly; 20. Middle part; 21. End part; 22. Through hole; 23. Front bearing seat; 24. Rear bearing seat; 25. Through hole slip ring; 26. Positioning block; 27. Positioning rod; 28. 1. Position switch; 29. ​​Position sensor; 30. Balance screw; 31. Balance weight; 32. Release cylinder; 33. Positioning plate; 34. Positioning hole; 35. Metal sensor; 36. Reset motor; 37. First bevel gear; 38. Second bevel gear; 39. Synchronous wheel; 40. Transmission belt; 41. Driven wheel; 42. Synchronous shaft; 43. Encoder; 44. Second bearing seat; 45. Electromagnetic clutch; 46. Color touch screen; 47. Printer; 48. Power switch; 49. Sliding rod; 50. Mounting base; 51. Motor seat. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings:

[0035] like Figure 1-8 As shown, on the one hand, this embodiment provides a fully automatic fabric tearing instrument, including a control system, a box 1, a swing device 2, a clamping device 6, a cutting device 9, a range adjustment device, a positioning release device 15, a swing arm reset device 16 and a swing measuring device, and the clamping device 6, the cutting device 9, the positioning release device 15, the adjustment motor 11, the swing arm reset device 16 and the swing measuring device are all electrically connected to the control system.

[0036] In this embodiment, a mounting base 50 is provided under the box body 1, and the control system is arranged on the mounting base 50. The control system includes a controller located inside the mounting base 50. A color touch screen 46, a printer 47 and a power switch 48 are provided on the front of the mounting base 50. The controller is electrically connected to the color touch screen 46, the printer 47 and the power switch 48.

[0037] In this embodiment, the swing device 2 includes a swing shaft 3 rotatably connected to the box body 1 through a bearing seat, the swing shaft 3 includes a middle portion 20 and end portions 21 located on both sides of the middle portion 20, the middle portion 20 is provided with a through hole 22, the weight 14 can pass through the through hole 22, and the two end portions 21 are respectively fixed to the box body 1 through a front bearing seat 23 and a rear bearing seat 24. One end of the swing shaft 3 extends out of the box body 1, and a first swing arm 4 is provided on the shaft body of the swing shaft 3 located in the box body 1, and a second swing arm 5 is provided on the end of the swing shaft 3 located outside the box body 1, and the swing device 2 is used to convert the potential energy of the first swing arm 4 into the kinetic energy of the second swing arm 5 to tear the sample to be tested;

[0038] In this embodiment, the range adjustment device includes an adjusting screw 12, an adjusting motor 11 and a sliding rod 49. The adjusting motor 11 is fixed to the swing shaft 3 through a motor seat 51. The adjusting motor 11 is rotatably connected to the adjusting screw 12. The axial directions of the sliding rod 49 and the adjusting screw 12 are parallel to the first swing arm 4. The other end of the adjusting screw 12 is fixed to the first swing arm 4 through a first bearing seat 13. One end of the sliding rod 49 is fixed to the motor seat 51, and the other end is fixed to the first swing arm 4. The screw on the adjusting screw 12 A weight 14 is connected to the first swing arm 4 through a groove, and the weight 14 is slidably connected to the slide bar 49. The adjusting motor 11 drives the adjusting screw rod 12 to rotate, and further drives the weight 14 to move along the slide bar 49, thereby changing the position of the weight 14 on the first swing arm 4. According to the lever principle, the potential energy of the weight 14 is changed to achieve the purpose of adjusting the range. Due to the difference from the traditional range adjustment method, the maximum range of the present invention is larger. The maximum range of the tearing instrument in this embodiment is 300N. In some other embodiments, a suitable maximum range can be set as needed.

[0039] In this embodiment, a through-hole slip ring 25 is sleeved on the swing shaft 3, the inner ring of the through-hole slip ring 25 is fixed on the swing shaft 3 and rotates with the swing shaft 3, a positioning block 26 is provided on the outer ring of the through-hole slip ring 25, and the positioning block 26 is clamped on the box body 1 through a positioning rod 27. The through-hole slip ring 25 can prevent the line on the first swing arm 4 from being broken when the swing shaft 3 rotates. During operation, the inner ring of the through-hole slip ring 25 rotates with the swing shaft 3, and the outer ring of the through-hole slip ring 25 is fixed on the box body 1.

[0040] In this embodiment, travel switches 28 are provided at both ends of the first swing arm 4, and a position sensor 29 is provided at one end of the first swing arm 4 close to the weight 14. The travel switch 28 and the position sensor 29 are electrically connected to a control system.

[0041] In this embodiment, a zero position calibration component is provided on the first swing arm 4, and the zero position calibration component includes a balancing screw 30 fixed on the first swing arm 4. Specifically, the balancing screw 30 is fixed to the first swing arm 4 through a motor seat 51, and the balancing screw 30 and the first swing arm 4 are on different sides of the swing shaft 3. A balancing weight 31 is threadedly connected to the balancing screw 30. By setting the balancing screw 30 and the balancing weight 31, the force applied to the weight 14 when returning to zero is 0N, thereby achieving the purpose of calibration.

[0042] In this embodiment, the clamping device 6 includes a movable clamp 7 and a fixed clamp 8. The fixed clamp 8 is fixed on the box body 1, and the movable clamp 7 is fixed on the second swing arm 5. The clamping device 6 is used to clamp the sample.

[0043] In this embodiment, the cutting device 9 is fixed on the box body 1 below the clamping device 6, and is used to cut a small hole on the sample; a gap is provided between the fixed clamp 8 and the movable clamp 7, and the cutting device 9 includes a cutter 18 and a cutting power assembly 19, wherein the cutter 18 is fixed on the cutting power assembly 19, and the cutting power assembly 19 is fixed on the box body 1, and the cutter 18 is placed in the gap between the fixed clamp and the movable clamp.

[0044] In this embodiment, the positioning release device 15 is arranged on the box body 1 and is clamped with the first swing arm 4. The positioning release device 15 includes a release cylinder 32, which is fixed on the top of the inner surface of the box body 1. The first swing arm 4 is provided with a positioning plate 33, and the positioning plate 33 is provided with a positioning hole 34. The output end of the release cylinder 32 can be clamped in the positioning hole 34. The box body 1 is provided with a metal sensor 35 for sensing the position of the first swing arm 4. The metal sensor 35 and the release cylinder 32 are both electrically connected to the control system. After the tear test is completed and the first swing arm 4 returns to its original position, the metal sensor 35 senses the first swing arm 4, and then feeds back the signal to the controller. The controller controls the release cylinder 32 to extend, and the output end of the release cylinder 32 is clamped in the positioning hole 34 to fix the first swing arm 4.

[0045] In this embodiment, the swing arm reset device 16 is arranged on the swing shaft 3, and the swing arm reset device 16 includes a reset motor 36, an electromagnetic clutch 45, a first bevel gear 37 and a second bevel gear 38, the first bevel gear 37 and the second bevel gear 38 are meshed with each other, the electromagnetic clutch 45 is sleeved on the swing shaft 3, the first bevel gear 37 is connected to the electromagnetic clutch 45, the second bevel gear 38 is transmission-connected with the reset motor 36, and the reset motor 36 is fixed on the box body 1. After the tearing is completed, the reset motor 36 drives the second bevel gear 38 to rotate, thereby driving the first bevel gear 37 to rotate, and under the action of the electromagnetic clutch 45, the swing shaft 3 rotates to complete the work process of resetting the swing arm.

[0046] In this embodiment, the swing shaft 3 is provided with a swing measuring device, which includes a synchronous wheel 39 fixed on the swing shaft 3, the synchronous wheel 39 is connected to a driven wheel 41 through a transmission belt 40, the driven wheel 41 is connected to an encoder 43 through a synchronous shaft 42, and the synchronous shaft 42 is fixed to the box body 1 through a second bearing seat 44. When the swing shaft 3 rotates, the synchronous wheel 39 is driven to rotate synchronously, and the encoder 43 records the rotation angle of the swing shaft 3 during tearing, compares it with the rotation angle of the swing shaft 3 when the tear meter is idling, obtains the angle difference, and then calculates the force consumed by tearing.

[0047] Another aspect of the present embodiment provides a method for testing the tear strength of the fully automatic fabric tearing instrument, comprising the following steps:

[0048] S10, calibration, the control system controls the weight 14 to return to zero, at which time the range corresponding to the weight 14 is 0N;

[0049] S20, setting the measuring range, the adjusting motor 11 drives the adjusting screw rod 12 to rotate, and drives the weight 14 to move along the slide bar 49. According to the lever principle, the position of the weight 14 on the first swing arm 4 changes, and the potential energy of the weight 14 changes accordingly. Different measuring ranges are set by changing the potential energy of the weight 14.

[0050] S30, sample detection, the sample is placed on the clamping device 6, the clamping device 6 is automatically clamped, the cutting device 9 automatically cuts a small hole on the sample, the positioning release device 15 releases the first swing arm 4, the first swing arm 4 rotates around the swing shaft 3, the swing measuring device detects the potential energy of the first swing arm 4 at this time, and the swing arm reset device 16 drives the swing arm to return to its position;

[0051] S40, the control system obtains the residual potential energy of the weight 14 after the sample is torn, calculates the energy consumed in tearing the sample, thereby obtaining the force required for tearing the sample, and then outputs the test data.

[0052] In the above embodiment, in the initial state, the weight 14 is at a certain height and has a certain potential energy. The positioning release device 15 fixes the first swing arm 4, the fixed clamp 8 and the movable clamp 7 clamp the sample, and the cutter 18 cuts a notch in the middle of the sample. When the weight 14 is in free swing, the fixed clamp 8 and the movable clamp 7 are quickly separated, and the sample is torn by the energy stored in the pendulum itself. The control system obtains the residual potential energy of the weight 14 after the sample is torn, calculates the energy consumed by the tearing sample, and thus obtains the force required for tearing the sample. Finally, the final test data is printed out by the printer 47. When it is necessary to change the range, the adjustment motor 11 drives the adjustment screw 12 to rotate, and further drives the weight 14 to move along the slide bar 49, thereby changing the position of the weight 14 on the first swing arm 4, changing the potential energy of the weight 14, and realizing the function of automatically adjusting the range according to the lever principle. At the same time, an electromagnetic clutch 45 is set on the swing shaft 3, and the automatic reset of the swing arm is realized through the joint action of the reset motor 36. In the actual operation process, various instructions are completed through the color touch screen 46, which is easy to operate and highly automated. Secondly, the measuring range is larger, with the maximum measuring range reaching 300N. A larger measuring range can also be designed according to the principle of the present invention as needed. At the same time, it is suitable for the determination of the tearing strength of various woven fabrics, and can also be used for the determination of the tearing strength of thick paper, plastic cloth, electrical tape, etc.

[0053] The above embodiments show and describe the basic principles and main features of the invention and the advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the invention. Without departing from the spirit and scope of the invention, the invention may have various changes and improvements, which shall fall within the scope of the invention to be protected. The scope of protection of the invention shall be defined by the attached claims and their equivalents.

Claims

1. Fully automatic fabric tearing instrument, including a control system and a box, characterized in that: The fully automatic fabric tearing instrument also includes: The swing device comprises a swing shaft rotatably connected to the box body, one end of the swing shaft extends out of the box body, a first swing arm is arranged on the shaft body of the swing shaft located in the box body, and a second swing arm is arranged on the end of the swing shaft located outside the box body; The clamping device comprises a movable clamp and a fixed clamp, wherein the fixed clamp is fixed on the box body, and the movable clamp is fixed on the second swing arm; A cutting device, fixed on the box below the clamping device; The range adjustment device comprises an adjustment screw, an adjustment motor and a slide rod, wherein the slide rod is fixed on the first swing arm, the adjustment motor is fixed on the swing shaft, one end of the adjustment screw rod is rotatably connected to the adjustment motor, and the other end of the adjustment screw rod is fixed to the first swing arm through a first bearing seat, the axial directions of the slide rod and the adjustment screw rod are parallel to the first swing arm, a weight is threadedly connected to the adjustment screw rod, and the weight is slidably connected to the slide rod; A positioning release device is arranged on the box body and is clamped with the first swing arm; The swing shaft is provided with a swing measuring device, and the clamping device, cutting device, positioning release device, regulating motor, swing arm reset device and swing measuring device are all electrically connected to the control system; The swing shaft comprises a middle portion and ends located on both sides of the middle portion, the middle portion is provided with a through hole, the weight can pass through the through hole, and the two ends are fixed to the box body through a front bearing seat and a rear bearing seat respectively; The first swing arm is provided with a zero position calibration component; The swing shaft is provided with a swing arm reset device, which includes a reset motor, an electromagnetic clutch, a first bevel gear and a second bevel gear. The first bevel gear and the second bevel gear are meshed with each other. The electromagnetic clutch is sleeved on the swing shaft, the first bevel gear is connected to the electromagnetic clutch, the second bevel gear is transmission-connected to the reset motor, and the reset motor is fixed on the box.

2. The fully automatic fabric tearing instrument according to claim 1, characterized in that: A gap is provided between the fixed clamp and the movable clamp. The cutting device comprises a cutter and a cutting power assembly. The cutter is fixed on the cutting power assembly, the cutting power assembly is fixed on the box body, and the cutter is placed in the gap between the fixed clamp and the movable clamp.

3. The fully automatic fabric tearing instrument according to claim 1, characterized in that: A through-hole slip ring is sleeved on the swing shaft, the inner ring of the through-hole slip ring is fixed on the swing shaft, and a positioning block is provided on the outer ring of the through-hole slip ring, and the positioning block is clamped on the box body through a positioning rod.

4. The fully automatic fabric tearing instrument according to claim 1, characterized in that: Travel switches are arranged at both ends of the first swing arm, and a position sensor is arranged at one end of the first swing arm close to the weight, and the travel switch and the position sensor are electrically connected to a control system.

5. The fully automatic fabric tearing instrument according to claim 1, characterized in that: The positioning and releasing device includes a releasing cylinder, which is fixed at the top of the inner surface of the box body. The first swing arm is provided with a positioning plate, and the positioning plate is provided with a positioning hole. The output end of the releasing cylinder can be snapped into the positioning hole. The box body is provided with a metal sensor for sensing the position of the first swing arm. The metal sensor and the releasing cylinder are both electrically connected to the control system.

6. The fully automatic fabric tearing instrument according to claim 1, characterized in that: The swing measuring device comprises a synchronous wheel fixed on the swing shaft, the synchronous wheel is connected to a driven wheel via a transmission belt, the driven wheel is connected to an encoder via a synchronous shaft, and the synchronous shaft is fixed to the box body via a second bearing seat.

7. A tear strength test method, using the fully automatic fabric tear tester according to any one of claims 1 to 6, characterized in that: The tear strength test method comprises the following steps: S10, calibration, the control system controls the weight to return to zero, at which point the weight corresponds to a range of 0N; S20, setting the measuring range, the adjusting motor drives the adjusting screw to rotate, and drives the weight to move along the sliding rod. According to the lever principle, the position of the weight on the first swing arm changes, and the potential energy of the weight changes accordingly. Different measuring ranges are set by changing the potential energy of the weight. S30, sample testing, placing the sample on the clamping device, the clamping device automatically clamps, the cutting device automatically cuts a small hole on the sample, the positioning release device releases the first swing arm, the first swing arm rotates around the swing axis, the swing measuring device detects the potential energy of the first swing arm at this time, and the swing arm resetting device drives the swing arm to return to its position; S40, the control system obtains the residual potential energy of the weight after the sample is torn, calculates the energy consumed in tearing the sample, thereby obtaining the force required for tearing the sample, and then outputs the test data.

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