Detachable persistent viscidity suspension tool appliance

Abstract

The invention discloses a detachable persistent viscidity suspension tool appliance which comprises a pasting stainless steel plate, a fixed balancing weight, an adjustable balancing weight, a hollow circular groove, a suspension weight and a test sample, the pasting stainless steel plate is connected with the side edge of the fixed balancing weight through a bolt, and the pasting stainless steel plate is used for fixing the test sample; the fixed balancing weight and the adjustable balancing weight are both in a right triangle shape in the side view, mortise and tenon joints are arranged on the right-angle sides of the fixed balancing weight and the adjustable balancing weight, the adjustable balancing weight is detachably connected with the fixed balancing weight through the mortise and tenon joints, a hollow circular groove is formed in the side face of the adjustable balancing weight, and one end of a test sample is connected with the pasting stainless steel plate. And the other end is connected with the suspension weight. The device is accurate in angle, the suspension center line is perpendicular to the ground, and the sample deviation angle error is smaller than or equal to 0.1 degree. And the force application is constant: through a counterweight balance equation, the suspension force of the suspension weight is ensured to be always 200g + / -2g. And the pasted stainless steel plate, the fixed balancing weight and the adjustable balancing weight all adopt modular design.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical device detection, and particularly relates to a detachable holding stickiness suspension tooling device. Background Art

[0002] In the holding stickiness test of dressing products, the sample needs to be suspended with a standard angle (2°) offset and a constant load applied to test its adhesion performance.

[0003] Chinese Utility Model CN217237699U discloses a tape holding stickiness tester, which includes a frame. A test assembly is arranged on the frame. The test assembly includes a gravity sensor, a timer and a weight. Both the gravity sensor and the timer are installed on the frame. The switches of the gravity sensor and the timer are electrically connected. The weight is located below the gravity sensor and is suspended. A tape is adhered between the gravity sensor and the weight. The foregoing solution has the following defects compared with the prior art: 1. Built-in inclined drag plate device: The drag plate supports the weight, resulting in the dispersion of the suspension force and unable to meet the standard force value requirements (for example, the actual force applied by a 200g weight is insufficient). 2. Hook limit device: The hook is prone to wear under long-term force, resulting in the deviation angle deviating from 2°, and the counterweight cannot be dynamically adjusted to compensate for the change in the sample mass. 3. The structure is non-detachable: Most of the existing devices are of an integrated design, which is difficult to maintain and unable to flexibly replace worn parts or adapt to different specifications of samples.

[0004] Based on the above problems, the present invention proposes a detachable tooling device, which solves the pain points of dispersed suspension force, angle deviation and inconvenient maintenance through the optimized design of modular counterweights and suspension centers. Summary of the Invention

[0005] Aiming at the problems proposed in the above background art, the purpose of the present invention is: to provide a detachable holding stickiness suspension tooling device, which realizes the precise control of the 2° offset suspension of dressing samples through modular counterweights, the suspension center balance equation and anti-wear design, and solves the problems of dispersed force application, angle deviation and difficult maintenance in the prior art.

[0006] To achieve the above technical purpose, the technical solution adopted by the present invention is as follows:

[0007] A detachable holding viscosity suspension tooling device, comprising a paste stainless steel plate, a fixed counterweight, an adjustable counterweight, a hollow circular groove, a hanging weight, and a test sample. The paste stainless steel plate is connected to the side of the fixed counterweight through bolts, and the paste stainless steel plate is used to fix the test sample. The fixed counterweight and the adjustable counterweight are both right-angled triangles in side view, and tenon and mortise interfaces are provided on the right-angled sides of the fixed counterweight and the adjustable counterweight. The adjustable counterweight is detachably connected to the fixed counterweight through the tenon and mortise interface. A hollow circular groove is provided on the side of the adjustable counterweight. One end of the test sample is connected to the paste stainless steel plate, and the other end is connected to the hanging weight.

[0008] Further defined, a suspension center line is formed at the connection joint of the fixed counterweight and the adjustable counterweight. The hollow circular groove is opened at least 10 cm from the bottom of the adjustable counterweight, and the diameter of the hollow circular groove is not less than 1 cm.

[0009] Further defined, the hollow circular groove of the adjustable counterweight is filled with carbon particles or metal particles to adjust the mass to satisfy the balance equation: adjustable counterweight = fixed counterweight + paste stainless steel plate + test sample + hanging weight, and the unit of the mass equation is grams.

[0010] Further defined, the surface of the paste stainless steel plate is treated by mirror polishing, and its roughness Ra ≤ 0.2 μm.

[0011] Further defined, the materials of the fixed counterweight and the adjustable counterweight are aluminum alloy, and their density ≥ 2.7 g / cm 3 .

[0012] Further defined, the included angle between the suspension center line and the direction perpendicular to the ground is 2° ± 0.1°.

[0013] Further defined, the tenon and mortise interface is a T-shaped dovetail groove structure, the depth of the dovetail groove is 5 mm, and its width is the same as the thickness of the adjustable counterweight.

[0014] Further defined, an extended mounting hole is provided at the top of the fixed counterweight, and the extended mounting hole is used to be fixed on the test bench bracket.

[0015] Further defined, mass scale lines are marked on the outside of the adjustable counterweight, and the scale accuracy of the mass scale lines is ±1 g.

[0016] Further defined, it further includes a calibration weight set, and the calibration weight set is used to verify the balance state of the suspension center line.

[0017] The beneficial effects of the present invention:

[0018] Accurate angle: The suspension center line is perpendicular to the ground, and the sample offset angle error ≤ 0.1°, meeting the requirements of ASTM / ISO standards.

[0019] Constant force application: Through the counterweight balance equation, ensure that the suspension force of the suspended weights is always 200g ± 2g.

[0020] Convenient maintenance: The stainless-steel plate pasting, fixed counterweight, and adjustable counterweight all adopt modular design, support quick replacement of worn parts, reduce the wear of consumables of the old device, and lower the usage cost.

[0021] Strong adaptability: The adjustable counterweight is suitable for test samples of different specifications. Description of the Drawings

[0022] The present invention can be further illustrated by the non-limiting embodiments given in the drawings;

[0023] Figure 1 It is the front view of an embodiment of a detachable adhesion suspension tooling device of the present invention;

[0024] Figure 2 It is the overall structure schematic diagram of an embodiment of a detachable adhesion suspension tooling device of the present invention;

[0025] Figure 3 It is the structure schematic diagram of the fixed counterweight of an embodiment of a detachable adhesion suspension tooling device of the present invention;

[0026] Figure 4 It is the structure schematic diagram of the adjustable counterweight of an embodiment of a detachable adhesion suspension tooling device of the present invention;

[0027] Figure 5 It is the structure schematic diagram of the stainless-steel plate pasting of an embodiment of a detachable adhesion suspension tooling device of the present invention.

[0028] The main element symbols are explained as follows: stainless-steel plate pasting 1, fixed counterweight 2, adjustable counterweight 3, hollow circular groove 4, suspended weights 5, plumb center line 6, test sample 7. Detailed Description of the Invention

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying 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 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.

[0032] As Figures 1 - 5 shown, a detachable holding viscosity suspension tooling apparatus of the present invention includes a paste stainless steel plate 1, a fixed counterweight 2, an adjustable counterweight 3, a hollow circular groove 4, a suspension weight 5 and a test sample 7. The paste stainless steel plate 1 is connected to the side of the fixed counterweight 2 by bolts, and the paste stainless steel plate 1 is used to fix the test sample 7. The fixed counterweight 2 and the adjustable counterweight 3 are both right-angled triangles in side view, and there are mortise and tenon joints on the right-angled sides of the fixed counterweight 2 and the adjustable counterweight 3. The adjustable counterweight 3 is detachably connected to the fixed counterweight 2 through the mortise and tenon joints. A hollow circular groove 4 is provided on the side of the adjustable counterweight 3. One end of the test sample 7 is connected to the paste stainless steel plate 1, and the other end is connected to the suspension weight 5.

[0033] Among them, the pasted stainless steel plate 1 has a size of 15.009 cm in length, 2.5 cm in width, and 0.1 cm in thickness; the fixed counterweight 2 has a size of 15.009 cm in inclined plane length, 15 cm in height, and 2.5 cm in thickness; the adjustable counterweight 3 has a size of 15.009 cm in inclined plane length, 15 cm in height, and 2.5 cm in thickness;

[0034] In the actual application of this embodiment, a hanging center line 6 is formed at the connection joint of the fixed counterweight 2 and the adjustable counterweight 3, and the hollow circular groove 4 is opened at least 10 cm from the bottom of the adjustable counterweight 3, and the diameter of the hollow circular groove 4 is not less than 1 cm.

[0035] In the actual application of this embodiment, the hollow circular groove 4 of the adjustable counterweight 3 is filled with carbon particles or metal particles to adjust the mass to satisfy the balance equation: adjustable counterweight 3 = fixed counterweight 2 + pasted stainless steel plate 1 + test sample 7 + hanging weight 5, and the unit of the mass equation is gram.

[0036] In the actual application of this embodiment, the surface of the pasted stainless steel plate 1 is mirror-polished, and its surface roughness Ra ≤ 0.2 μm.

[0037] In the actual application of this embodiment, the fixed counterweight 2 and the adjustable counterweight 3 are made of aluminum alloy, and their density ≥ 2.7 g / cm 3 .

[0038] In the actual application of this embodiment, the included angle between the hanging center line 6 and the direction perpendicular to the ground is 2° ± 0.1°.

[0039] In the actual application of this embodiment, the mortise and tenon interface is a T-shaped dovetail groove structure, the depth of the dovetail groove is 5 mm, and its width is the same as the thickness of the adjustable counterweight 3.

[0040] In the actual application of this embodiment, the top of the fixed counterweight 2 is provided with an extended installation hole, and the extended installation hole is used to be fixed on the test bench bracket.

[0041] In the actual application of this embodiment, the outer side of the adjustable counterweight 3 is marked with mass scale lines, and the scale accuracy of the mass scale lines is ±1 g.

[0042] In the actual application of this embodiment, it further includes a calibration weight set, and the calibration weight set is used to verify the balance state of the hanging center line 6.

[0043] The working principle of the present invention is as follows:

[0044] The present invention balances the gravity of the fixed counterweight 2 and the adjustable counterweight 3, so that the plumb center line 6 is always perpendicular to the ground. After the test sample 7 is connected to the paste stainless steel plate 1, the mass of the adjustable counterweight 3 is adjusted until the balance equation holds. At this time, the force exerted by the hanging weight 5 acts completely on the sample, and the sample naturally forms a 2° offset angle due to the gravity distribution.

[0045] The core principle of the present invention is based on the static moment balance. Through the symmetrical distribution and mass adjustment of the counterweights, the plumb center line 6 is strictly perpendicular to the ground, thus ensuring that the sample offset angle is constantly 2°.

[0046] The specific mechanism is as follows:

[0047] Taking the plumb center line 6 as the fulcrum, the left moment (fixed counterweight 2, paste stainless steel plate 1, test sample 7) and the right moment (adjustable counterweight 3, hanging weight 5) need to be equal; by designing the fixed counterweight 2 and the adjustable counterweight 3 as right triangles, with their centers of gravity located at the geometric centers, the equation is: adjustable counterweight 3 = fixed counterweight 2 + paste stainless steel plate 1 + test sample 7 + hanging weight 5

[0048] The inclined planes of the fixed counterweight 2 and the adjustable counterweight 3 are 15.009 cm long and 15 cm high, forming a right triangle with an included angle between the hypotenuse and the vertical direction of approximately 2°. Through the precise design of the straight edge width of 0.52 cm, the angle error is ≤0.1°.

[0049] The hollow circular groove 4 is located 10 cm from the bottom of the adjustable counterweight 3. When filled with carbon particles or metal particles, the center of gravity height of the particles is 10 cm, ensuring that the adjustment process does not affect the moment balance.

[0050] The usage process is as follows:

[0051] Assemble the tooling:

[0052] Vertically fix the fixed counterweight 2 to the back of the stainless steel plate 1 with bolts, ensuring that the joints are aligned. Connect the adjustable counterweight 3 to the fixed counterweight 2 through a T-shaped dovetail groove, and check that the mortise and tenon joints are not loose.

[0053] Paste the sample:

[0054] Paste the dressing sample with a width of 2.5 cm to 5 cm centered along the length direction of the stainless steel plate 1, ensure no air bubbles, and let it stand for 5 minutes to cure.

[0055] Adjust the counterweight:

[0056] Weigh the total mass of the stainless steel plate 1, the test sample 7, and the fixed counterweight 2, and calculate the target mass of the adjustable counterweight 3 according to the balance equation. Add carbon particles or metal particles through the hollow circular groove 4, and monitor in real time with an electronic scale until the target mass ±1 g is reached.

[0057] Suspension and Calibration:

[0058] Suspend a 200g hanging weight 5 below the center line of the plumb line 6; use an angle gauge to measure the sample deviation angle. If it exceeds the tolerance of ±0.1°, finely adjust the mass of the counterweight or check whether the component installation is horizontal.

[0059] Test Execution:

[0060] Start the test bench, record the shedding time of the sample under a constant load, and monitor the angle stability in real time during the test.

[0061] Example 1: Test of Standard Dressing Sample

[0062] Scenario: Laboratory environment, test the tack of medical tape.

[0063] Operation Process:

[0064] Install and fix the counterweight 2 (mass 150g), and connect the adjustable counterweight 3 (initial mass 100g).

[0065] Paste the test sample 7 (mass 5g) on the stainless steel paste plate 1 (mass 50g), and calculate the target mass:

[0066] Adjustable counterweight 3 = 150g + 50g + 5g + 200g = 405g;

[0067] Add carbon particles to the hollow circular groove 4 until the total mass of the adjustable counterweight reaches 405g. A vibrator can be used to compact the filler. Suspend the 200g hanging weight 5, and the deviation angle measured by the laser angle gauge is 2.02°, which meets the standard; continue the test for 30 minutes, the sample does not fall off, and the angle fluctuation ≤ 0.05°.

[0068] Example 2: Test of Wide Sample

[0069] Scenario: Test a 5 cm wide waterproof dressing.

[0070] Adapter Design:

[0071] The similarities between this example and Example 1 will not be elaborated here. The differences are as follows: Replace the lengthened stainless steel paste plate 1 with a length of 20 cm and a mass of 80g; the mass of the fixed counterweight 2 is increased to 200g and thickened to 3 cm.

[0072] Adjustment Process:

[0073] Target mass: Adjustable counterweight 3 = 200g + 80g + 10g + 200g = 490g.

[0074] Fill tungsten powder with a density of 19.3g / cm 3 into the adjustable counterweight, and calibrate it to 490g ± 2g through the outer scale line 9.

[0075] Example 3: High-temperature environment test

[0076] Scenario: Test the dressing sample under the high-temperature sterilization environment at 80°C.

[0077] The same parts of this example and Example 1 will not be elaborated. The differences are as follows: The materials of the fixed counterweight 2 and the adjustable counterweight 3 are replaced with titanium alloy, with a temperature resistance of ≥300°C, and the hollow circular groove 4 is filled with high-temperature resistant ceramic beads with a density of 3.8 g / cm 3 .

[0078] Verification result: The counterweight has no deformation at high temperature, the angle error is 0.08°, and the adhesion force decline rate of the test sample 7 is <5%.

[0079] Example 4: Quick calibration scenario

[0080] Scenario: Quick quality inspection on the production line.

[0081] Calibration tool: Use a set of calibration weights (including 50g and 100g standard weights).

[0082] Steps: Remove the adjustable counterweight 3, hang the calibration weight on the suspension center line 6. If the device is tilted, increase or decrease the counterweight according to the scale line until the center line is vertical. After calibration, the measured angle error is ≤0.05°, and the single calibration time is <3 minutes.

[0083] Example 5: Maintenance and replacement scenario

[0084] Scenario: The adjustable counterweight 3 is worn after long-term use.

[0085] Replacement process: Disassemble the mortise and tenon interface, remove the adjustable counterweight 3. Clean the residual particles at the mortise and tenon interface, install a new adjustable counterweight 3 and fill it with alumina particles for moisture protection, and re-calibrate according to the original balance equation to ensure that the mass error is <1g.

[0086] The above examples only exemplarily illustrate the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above examples without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A detachable holding and sticking suspension tooling device, characterized in that: It includes a pasted stainless steel plate (1), a fixed counterweight (2), an adjustable counterweight (3), a hollow circular groove (4), a suspended weight (5) and a test sample (7). The pasted stainless steel plate (1) is connected to the side of the fixed counterweight (2) by bolts. The pasted stainless steel plate (1) is used to fix the test sample (7). Both the fixed counterweight (2) and the adjustable counterweight (3) are right-angled triangles in side view. Tenon and mortise joints are provided on the right-angled sides of the fixed counterweight (2) and the adjustable counterweight (3). The adjustable counterweight (3) is detachably connected to the fixed counterweight (2) through the tenon and mortise joints. A hollow circular groove (4) is formed on the side of the adjustable counterweight (3). One end of the test sample (7) is connected to the pasted stainless steel plate (1), and the other end is connected to the suspended weight (5).

2. The tooling fixture according to claim 1, characterized in that: A plumb center line (6) is formed at the connection joint between the fixed counterweight (2) and the adjustable counterweight (3). The hollow circular groove (4) is opened at least 10 cm from the bottom of the adjustable counterweight (3), and the diameter of the hollow circular groove (4) is not less than 1 cm.

3. A detachable holding and hanging tooling device according to claim 1, characterized in that: The hollow circular groove (4) of the adjustable counterweight (3) is filled with carbon particles or metal particles to adjust the mass to satisfy the balance equation: adjustable counterweight (3) = fixed counterweight (2) + pasted stainless steel plate (1) + test sample (7) + suspended weight (5). The unit of the mass equation is gram.

4. The detachable holding and hanging tooling device according to claim 1, characterized in that: The surface of the pasted stainless steel plate (1) is polished to a mirror finish, and its roughness Ra ≤ 0.2 μm.

5. The detachable tack-holding hanging tooling device according to claim 1, characterized in that: The fixed counterweight block (2) and the adjustable counterweight block (3) are made of aluminum alloy, and their density ≥ 2.7 g / cm 3 .

6. The detachable holding and sticking suspension tooling device according to claim 1, wherein: The angle between the plumb center line (6) and the direction perpendicular to the ground is 2° ± 0.1°.

7. A detachable holding and sticking hanging tooling device according to claim 1, characterized in that: The tenon and mortise joint is a T-shaped dovetail groove structure. The depth of the dovetail groove is 5 mm, and its width is the same as the thickness of the adjustable counterweight (3).

8. The detachable holding and sticking suspension tooling device according to claim 1, characterized in that: An extended mounting hole is provided at the top of the fixed counterweight (2). The extended mounting hole is used to be fixed to the test bench bracket.

9. A detachable adhesion holding hanging tooling device according to claim 1, characterized in that: Mass scale lines are marked on the outside of the adjustable counterweight (3), and the scale accuracy of the mass scale lines is ±1 g.

10. A detachable adhesion holding suspension tooling device according to claim 1, characterized in that: It further includes a calibration weight set, and the calibration weight set is used to verify the balance state of the plumb center line (6).

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