CN113933151B - Rubber bark tensile strength testing device and testing method - Google Patents
Rubber bark tensile strength testing device and testing method Download PDFInfo
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- CN113933151B CN113933151B CN202111101756.1A CN202111101756A CN113933151B CN 113933151 B CN113933151 B CN 113933151B CN 202111101756 A CN202111101756 A CN 202111101756A CN 113933151 B CN113933151 B CN 113933151B
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 38
- 238000005520 cutting process Methods 0.000 claims description 93
- 238000000034 method Methods 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 2
- 239000010985 leather Substances 0.000 description 7
- 239000002023 wood Substances 0.000 description 3
- 102100023170 Nuclear receptor subfamily 1 group D member 1 Human genes 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000003020 moisturizing effect Effects 0.000 description 2
- 210000003781 tooth socket Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a rubber bark tensile strength testing device and a testing method, wherein the testing device comprises a first clamping head, a second clamping head, a linear sliding rail, a hoop, a tension detector and a telescopic rod, wherein the linear sliding rail is fixed on a rubber tree through the hoop, the first clamping head and the second clamping head are both in sliding connection with the linear sliding rail, one end of the telescopic rod is fixedly connected with the first clamping head, the tension detector is arranged at the other end of the telescopic rod, and the other end of the tension detector is connected with the second clamping head. The invention provides a rubber bark tensile strength testing device which can conduct tensile strength tests on rubber trees and reduce influence on the rubber trees.
Description
Technical Field
The invention relates to the technical field of tensile strength testing, in particular to a rubber bark tensile strength testing device.
Background
At present, in the testing of the tensile property and the shearing strength of the bark of a rubber tree, the mechanical parameters of the fresh bark of the rubber tree need to be tested, the bark is collected at a rubber tree log cutting site, the raw wood is immediately sampled after being cut down, the length of the raw wood is 30-50cm, the width of the raw wood is 3-5cm, two cutting marks are cut in parallel along the trunk direction by a cutting knife, the two cutting marks are cut along the trunk circumferential direction, the bark is taken down by a tool, the bark is immediately wrapped by wet cloth and placed in a refrigerator to keep moisture, and finally the bark is brought into a test room to be tested by a tensile strength tester. The existing tensile strength testing device is large in size and high in cost, for example, a vibration-free material tensile testing machine with the publication number of CN112229725A cannot be used for carrying equipment to a rubber forest for testing, rubber barks need to be cut off from the tree, and the influence on the rubber tree is large.
Disclosure of Invention
The invention aims to provide a rubber bark tensile strength testing device and a testing method, which can be used for carrying out a tensile strength test on a rubber tree and reduce the influence on the rubber tree.
The technical scheme of the invention is realized as follows:
The utility model provides a rubber bark tensile strength testing arrangement, includes first clamping head, second clamping head, linear slide rail, staple bolt, tensile force detector and telescopic link, linear slide rail passes through the staple bolt is fixed on the rubber tree, first clamping head and second clamping head all with linear slide rail sliding connection, telescopic link one end with first clamping head fixed connection, the other end is equipped with tensile force detector, tensile force detector's the other end with the second clamping head is connected.
Further, the telescopic rod is an electric telescopic rod, a motor of the electric telescopic rod is a stepping motor, the stepping motor is in signal connection with the tension detector and the controller, and the controller is in signal connection with the display.
Further, the first clamping head and the second clamping head comprise a 'mouth' -shaped rod, clamping blocks and a screw rod, the bottom of the 'mouth' -shaped rod is provided with a cutting edge, the clamping blocks are slidably connected in the 'mouth' -shaped rod, the screw rod is in threaded connection with the upper portion of the 'mouth' -shaped rod, and the screw rod can push the clamping blocks to move towards the bottom of the 'mouth' -shaped rod when rotating.
Further, still include arc slide rail, cutting knife and handle, be equipped with first slider on the linear slide rail, be equipped with on the first slider arc slide rail, the second slider with arc slide rail sliding connection, the second slider with the handle is connected, the lower extreme of handle is equipped with the cutting knife, the cutting knife is equipped with the cutting part that is used for cutting into rubber bark, the centre of a circle of second slider motion track is located the centre of cutting part, be equipped with a plurality of tooth grooves on the linear slide rail, first slider be equipped with tooth groove complex non-return tooth piece.
Further, the arc-shaped sliding rail comprises a first rail and a second rail, an arc-shaped sliding groove is arranged between the first rail and the second rail, and the second sliding block is in sliding connection with the arc-shaped sliding groove.
Further, the second track is provided with a mounting frame, the mounting frame is connected with a sliding rod in a sliding mode, the sliding rod can slide along the mounting frame in the direction perpendicular to the linear sliding rail, one end, facing the linear sliding rail, of the sliding rod is provided with a non-return tooth block, and the mounting frame is provided with a spring for pushing the non-return tooth block to move towards the tooth slot.
Further, the non-return tooth block comprises a movable block and a one-way convex tooth arranged at the bottom of the movable block, and the tooth slot is a one-way tooth slot.
Further, the second slider top rotates and is connected with the sleeve, and the below is equipped with L shape pole, the handle with first slider sliding connection, the sleeve with handle threaded connection is located the handle side of first slider below is equipped with the recess, the side of recess is the plane, the lower extreme of L shape pole with the side butt of recess.
Further, the staple bolt includes first C shape ring, second C shape ring and bolt, first C shape ring with linear slide fixed connection, the second C shape ring passes through the screw rod with first C shape ring is connected, cutting tool has 4 cutting parts that set up along perpendicular to linear slide direction, the bottom of cutting part is equipped with the pointed end.
A testing method of a rubber bark tensile strength testing device comprises the following steps:
S1, cutting off rubber barks in the circumferential direction of a rubber tree by using a cutter, cutting off the rubber barks downwards along the trunk direction of the rubber tree from a cut mark, peeling off the rubber barks from the trunk, connecting the lower end of the peeled rubber barks of the trunk with the rubber tree, and disconnecting the upper end and two sides of the peeled rubber barks with the rubber tree;
S2, fixing the anchor ear on a rubber tree, respectively clamping different parts of the rubber leather by using a first clamping head and a second clamping head, operating the electric telescopic rod to extend the electric telescopic rod, driving the first clamping head and the second clamping head to be mutually far away from the stretched rubber leather by the electric telescopic rod, and detecting the tensile force by a tensile force detector in the stretching process.
The invention has the beneficial effects that: when the invention is used, the anchor ear is required to be fixed on the rubber tree, and the two ends of the linear slide rail are respectively fixedly connected with the anchor ear, so that the linear slide rail is fixed. The first clamping head and the second clamping head are slid to the proper positions of the rubber leather, different parts of the rubber leather are clamped by the first clamping head and the second clamping head respectively, the electric telescopic rod is operated to extend, the electric telescopic rod drives the first clamping head and the second clamping head to be far away from each other, the rubber leather is stretched, and the tensile force is detected by the tensile force detector in the stretching process. The invention has simple structure and convenient operation, can directly detect the tensile strength of the rubber bark on the rubber tree, and the rubber bark is kept fresh during detection without the operations such as freezing, moisturizing and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only preferred embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of a tensile strength testing apparatus for rubber bark according to embodiment 1 of the present invention;
FIG. 2 is a perspective view of a tensile strength testing apparatus for rubber bark according to embodiment 2 of the present invention;
FIG. 3 is an enlarged view of area A of FIG. 2 in accordance with the present invention;
fig. 4 is a schematic diagram of a first motion trace of a cutter according to embodiment 2 of the present invention;
FIG. 5 is a schematic view of a second motion profile of the cutter according to embodiment 2 of the present invention;
In the drawing, a first clamping head, a second clamping head, a tension detector, a 104 telescopic rod, a 105 controller, a 106 display, a 107-shaped rod, a 108 clamping block, a 109 screw rod, a 1010 knife edge, a1 hoop, a2 linear slide rail, a 3 arc slide rail, a 4 cutting knife, a 5 handle, a 6 first slide block, a 7 second slide block, an 8 cutting part, a 9 tooth socket, a 10 non-return tooth block, a11 first track, a12 second track, a 13 arc slide groove, a 14 mounting rack, a 15 slide bar, a 16 spring, a 17 movable block, a 18 one-way convex tooth, a 19 one-way tooth socket, a 20 sleeve, a 21L-shaped rod, a 22 groove, a 23 first C-shaped ring, a 24 second C-shaped ring, a 25 bolt and a 26 tip.
Detailed Description
For a better understanding of the technical content of the present invention, specific examples are provided below and the present invention is further described with reference to the accompanying drawings.
Example 1
Referring to the figure, a rubber bark tensile strength testing device comprises a first clamping head 101, a second clamping head 102, a linear sliding rail 2, a hoop 1, a tension detector 103 and a telescopic rod 104, wherein the linear sliding rail 2 is fixed on a rubber tree through the hoop 1, the first clamping head 101 and the second clamping head 102 are both in sliding connection with the linear sliding rail 2, one end of the telescopic rod 104 is fixedly connected with the first clamping head 101, the other end of the telescopic rod is provided with the tension detector 103, and the other end of the tension detector 103 is connected with the second clamping head 102. Firstly cutting off the rubber bark in the circumferential direction of the rubber tree by using a cutter, then cutting off the rubber bark downwards along the trunk direction of the rubber tree from a cut mark, peeling off part of the rubber bark from the trunk, then testing the tensile strength of the rubber bark on the rubber tree by using the device disclosed by the invention, and binding the rubber bark after the test is finished after the rubber bark is attached to the trunk. When bark is cut along the trunk direction, the anchor ear 1 of the invention is fixed on a rubber tree, and two ends of the linear slide rail 2 are respectively fixedly connected with the anchor ear 1, so that the linear slide rail 2 is fixed. The first clamping head 101 and the second clamping head 102 are slid to the proper positions of the rubber sheet, different parts of the rubber sheet are clamped by the first clamping head 101 and the second clamping head 102 respectively, the electric telescopic rod 104 is operated to extend the electric telescopic rod 104, the electric telescopic rod 104 drives the first clamping head 101 and the second clamping head to be far away from each other, the rubber sheet is stretched, and the tension detector 103 detects the tension in the stretching process. The invention has simple structure and convenient operation, can directly detect the tensile strength of the rubber bark on the rubber tree, and the rubber bark is kept fresh during detection without the operations such as freezing, moisturizing and the like.
Specifically, the telescopic rod 104 is an electric telescopic rod 104, a motor of the electric telescopic rod 104 is a stepping motor, the stepping motor is in signal connection with the tension detector 103 and the controller 105, and the controller 105 is in signal connection with the display 106. The controller 105 controls the stepping motor to rotate slowly, so that the rotating speed of the stepping motor is easy to control, and the stretching speed is convenient to control. The tension detector 103 transmits the detected tension signal to the controller 105, the rotation speed signal of the stepping motor and the tension signal of the tension detector 103 are processed by the controller 105 and then displayed on the display 106, and the display 106 can display the stretching speed and the tension.
Specifically, the first clamping head 101 and the second clamping head 102 each comprise a "mouth" shaped rod 107, a clamping block 108 and a screw 109, the bottom of the "mouth" shaped rod 107 is provided with a cutting edge 1010, the clamping block 108 is slidably connected in the "mouth" shaped rod 107, the screw 109 is in threaded connection with the upper portion of the "mouth" shaped rod 107, and when the screw 109 rotates, the clamping block 108 can be pushed to move towards the bottom of the "mouth" shaped rod 107. Rubber bark passes through the middle of the "mouth" shaped bar 107, and when the screw 109 is rotated, the screw 109 pushes the clamping block 108 to move toward the bottom of the "mouth" shaped bar 107, thereby clamping the rubber bark. A blade 1010 is provided at the bottom of the "mouth" shaped bar 107, the blade 1010 passing between the rubber bark and the trunk, thereby peeling the bark from the tree, the peeled rubber bark being connected to the rubber tree at only the lower end and disconnected from the rubber tree at both the upper end and both sides. Under the combined action of the 'mouth' -shaped rod 107 and the clamping blocks 108, the rubber bark is wrapped around the clamping part, so that the clamping is firmer.
Example 2
Referring to fig. 2 to 5, the difference between this embodiment and embodiment 1 is that the device further includes an arc-shaped slide rail 3, a cutter 4 and a handle 5, a first slide block 6 is disposed on the linear slide rail, the first slide block 6 is disposed on the arc-shaped slide rail 3, a second slide block 7 is slidably connected with the arc-shaped slide rail 3, the second slide block 7 is connected with the handle 5, the lower end of the handle 5 is provided with the cutter 4, the cutter 4 is provided with a cutting portion 8 for cutting into rubber bark, the center of the movement track of the second slide block 7 is located in the middle of the cutting portion 8, a plurality of tooth grooves 9 are disposed on the linear slide rail 2, and the first slide block 6 is provided with a non-return tooth block 10 matched with the tooth grooves 9.
Two anchor clamps 1 are fixed in the not co-altitude position on the trunk, the both ends of linear slide rail 2 are equipped with anchor clamps 1, utilize anchor clamps 1 to fix linear slide rail 2 on the trunk, linear slide rail 2 is parallel with the axle center of trunk. The linear slide rail 2 is provided with a first slider 6, and the first slider 6 slides along the linear slide rail 2. An arc-shaped sliding rail 3 is arranged on the first sliding block 6, and the arc-shaped sliding rail 3 can slide along the linear sliding rail 2 along with the first sliding block 6. The arc-shaped sliding rail 3 is slidably connected with a second sliding block 7, and the second sliding block 7 can move along the arc-shaped sliding rail 3 in an arc shape. The second slider 7 is provided with a handle 5 and a cutter 4 connected to the handle 5, and the cutter 4 is provided with a cutter 8 for cutting into rubber bark, and the handle 5 is swung after the cutter 8 is inserted into the rubber bark. The handle 5 is rocked to drive the second slider 7 to slide along the arc-shaped sliding rail 3, or drive the arc-shaped sliding rail 3 to move along the linear sliding rail 2 along with the first slider 6, and as the circle center of the movement track of the second slider 7 is positioned in the middle of the cutting part 8, the cutting knife 4 is driven to rotate when the second slider 7 slides along the arc-shaped sliding rail 3, and the rotating center of the cutting knife 4 coincides with the circle center of the movement track of the second slider 7. As shown in fig. 4, the upper part of the rubber bark is thus cut when the cutter 4 rotates in the clockwise direction, and the lower part of the rubber bark is cut when the cutter 4 rotates in the counterclockwise direction. In the case of cutting the rubber bark with the same force, since the cross section of the rubber bark is reduced each time, it is easier to cut the rubber bark, and the rubber bark can be cut even in the case of using a smaller force.
In the operation step of cutting, in the invention, after the cutting part 8 is inserted into the rubber bark, the handle 5 is swung forwards by a small margin, the handle 5 rotates clockwise, so that the cutter 4 rotates in the clockwise direction, the upper part of the rubber bark is cut by the cutter 4, then the handle 5 is swung backwards by a small margin, so that the cutter 4 rotates the rod in the anticlockwise direction, and the lower part of the rubber bark is cut by the cutter 4. The handle 5 is greatly rocked back and forth after the length to be cut is enlarged, the cutter 4 rotates clockwise when the handle 5 is greatly rocked forward, but the rotating amplitude is larger, the cutting distance of the cutter 4 to the upper rubber bark is larger, when the second sliding block 7 moves forward to the limit position, the handle 5 is pulled forward, the first sliding block 6 is driven to move forward by a small margin through the handle 5, the upper rubber bark is further cut, the circle center of the movement track of the second sliding block 7 moves forward, the handle 5 is greatly rocked backward, the cutter 4 rotates anticlockwise, the cutter 4 cuts the lower rubber bark, and the rubber bark can be cut along the direction of the rubber trunk by repeating the actions.
In another cutting operation step, the handle 5 is further rocked backwards after the second slider 7 moves forwards to the limit position, the handle 5 is in the vertical state and then the arc-shaped sliding rail 3 or the first slider 6 is pulled forwards, the first slider 6 moves forwards slightly to drive the cutting knife 4 to cut the rubber bark in the middle, the circle center of the motion track of the second slider 7 moves forwards, then the handle 5 is rocked backwards to enable the cutting knife 4 to rotate in the anticlockwise direction, the cutting knife 4 cuts the rubber bark in the lower portion, the handle 5 is rocked forwards again after the second slider 7 moves backwards to the limit position, the handle 5 is in the vertical state and then the arc-shaped sliding rail 3 or the first slider 6 is pulled forwards, and the first slider 6 moves forwards slightly to drive the cutting knife 4 to cut the rubber bark in the middle, so that the circle center of the motion track of the second slider 7 moves forwards.
According to the invention, the linear slide rail 2 is provided with the tooth grooves 9, the first slide block 6 is provided with the non-return tooth blocks 10 matched with the tooth grooves 9, and the first slide block 6 can only move forwards and cannot move backwards under the action of the non-return tooth blocks 10, so that the first slide block 6 can be driven to move forwards when the handle 5 is pulled forwards, and the first slide block 6 cannot be driven to move backwards when the handle 5 is rocked backwards. The non-return tooth piece 10 will make a sound when blocked into tooth groove 9, can judge the distance that first slider 6 moved forward through the sound to the staff is convenient for judge the opportunity of rocking handle 5 backward. The tree bark cutting device is simple in structure and convenient to operate, rubber tree barks can be cut in a labor-saving mode only by reciprocating shaking and pulling the handle 5, and the cutting device can be carried into a forest farm to be fixed on a tree for cutting. According to the invention, the cutting knife 4 rotates when the handle 5 is shaken, the resistance moment of rubber bark acting on the cutting knife 4 is small, the moment of staff acting on the handle 5 is large, and the labor is saved when the rubber bark is cut.
Specifically, the arc-shaped sliding rail 3 comprises a first rail 11 and a second rail 12, an arc-shaped sliding groove 13 is arranged between the first rail 11 and the second rail 12, and the second sliding block 7 is slidably connected in the arc-shaped sliding groove 13. The first track 11 and the second track 12 are arc-shaped, an arc-shaped chute 13 is formed between the first track 11 and the second track 12, the center of the arc-shaped chute 13 is positioned in the middle of the cutting part 8, and the second sliding block 7 slides in the arc-shaped chute 13, so that the upper part and the lower part of the second sliding block 7 are supported, the rotation error of the cutting knife 4 is reduced, and the upper part of the rubber bark is cut when the handle 5 is rocked forwards.
Specifically, the second track 12 is provided with a mounting frame 14, the mounting frame 14 is slidably connected with a sliding rod 15, the sliding rod 15 can slide along the mounting frame 14 in a direction perpendicular to the linear sliding rail 2, one end of the sliding rod 15, which faces the linear sliding rail 2, is provided with the non-return tooth block 10, and the mounting frame 14 is provided with a spring 16 for pushing the non-return tooth block 10 to move towards the tooth slot 9. The mounting frame 14 is fixed on the second track 12, and a through hole is arranged on the mounting frame 14, and the sliding rod 15 passes through the through hole, so that the sliding rod 15 is in sliding connection with the mounting frame 14. The sliding rod 15 can slide along the mounting frame 14 in a direction perpendicular to the linear sliding rail 2, the non-return tooth block 10 is arranged at one end of the sliding rod 15 facing the linear sliding rail 2, and the non-return tooth block 10 moves towards the tooth slot 9 under the action of the spring 16, so that the non-return tooth block 10 is clamped into the tooth slot 9, and the first sliding block 6 is prevented from moving backwards. When the handle 5 is shaken to the right, the handle 5 is turned so that the cutter 4 cuts the rubber bark. The non-return tooth block 10 is firmly matched with the tooth slot 9, and the non-return tooth block 10 cannot be pushed backwards after being inserted into the tooth slot 9. When the distance between the teeth moves forwards once, the non-return tooth block 10 is blocked into the new tooth slot 9 again, sound can be generated when the non-return tooth block 10 is blocked into the tooth slot 9, and the distance of the forward movement of the first sliding block 6 can be judged through sound, so that a worker can conveniently judge the time of shaking the handle 5 backwards, and the distance of the movement of the rotating center of the cutting knife 4 can also be conveniently judged.
Specifically, the non-return tooth block comprises a movable block and a unidirectional convex tooth arranged at the bottom of the movable block, and the tooth slot is a unidirectional tooth slot. The one-way teeth 18 and one-way tooth slots 19 ensure that the non-return tooth block 10 can move forward out of the tooth slots 9 but cannot move backward.
Specifically, the second slider top rotates and is connected with the sleeve, and the below is equipped with L shape pole, the handle with first slider sliding connection, the sleeve with handle threaded connection is located the handle side of first slider below is equipped with the recess, the side of recess is the plane, the lower extreme of L shape pole with the side butt of recess. Since the sleeve 20 is in threaded connection with the handle 5, the handle 5 is pushed to move up and down when the sleeve 20 is rotated, so that the depth of the cutting knife 4 cutting into the rubber is adjusted. The sleeve 20 is located above the mounting frame 14, and the sleeve 20 can be operated when cutting rubber bark, thereby conveniently adjusting the depth of the cutter 4. An L-shaped rod 21 is arranged below the second sliding block 7, a groove 22 is formed in the side face of the handle 5 below the first sliding block 6, the side face of the groove 22 is a plane, the lower end of the L-shaped rod 21 is in butt joint with the side face of the groove 22, the limit of the L-shaped rod 21 received by the handle 5 cannot rotate, the cutting knife 4 is guaranteed not to rotate in the process of cutting rubber, and therefore the cutting knife 4 is guaranteed to be parallel to the cutting direction.
Specifically, the staple bolt includes first C shape ring, second C shape ring and bolt, first C shape ring with linear slide fixed connection, the second C shape ring pass through the screw rod with first C shape ring is connected. The first C-shaped ring 23 and the second C-shaped ring 24 are used for encircling the rubber tree from different directions, the first C-shaped ring 23 and the second C-shaped ring 24 are connected through a screw, and the rubber tree is locked by adjusting the distance between the first C-shaped ring 23 and the second C-shaped ring 24.
Specifically, cutting tool has 4 cutting parts that set up along perpendicular to linear slide rail direction, and 4 are cutting bark simultaneously to cutting tool 4 when operating handle 5, 4 parallel cuts of cutting on the rubber tree bark that can be quick, the bottom of cutting part is equipped with the pointed end, and cutting tool 4 of being convenient for inserts the rubber bark.
A testing method of a rubber bark tensile strength testing device comprises the following steps: s1, cutting off rubber barks in the circumferential direction of a rubber tree by using a cutter, cutting off the rubber barks downwards along the trunk direction of the rubber tree from a cut mark, peeling off the rubber barks from the trunk, connecting the lower end of the peeled rubber barks of the trunk with the rubber tree, and disconnecting the upper end and two sides of the peeled rubber barks with the rubber tree; s2, fixing the anchor ear on a rubber tree, respectively clamping different parts of the rubber leather by using a first clamping head and a second clamping head, operating the electric telescopic rod to extend the electric telescopic rod, driving the first clamping head and the second clamping head to be mutually far away from the stretched rubber leather by the electric telescopic rod, and detecting the tensile force by a tensile force detector in the stretching process. And (3) attaching the rubber bark to the trunk after the test is finished, and finally binding the rubber bark by using a binding belt.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The utility model provides a rubber bark tensile strength testing arrangement, its characterized in that includes first clamping head, second clamping head, linear slide rail, staple bolt, tensile force detector and telescopic link, linear slide rail passes through the staple bolt is fixed on the rubber tree, first clamping head and second clamping head all with linear slide rail sliding connection, telescopic link one end with first clamping head fixed connection, the other end is equipped with tensile force detector, tensile force detector keep away from first clamping head one end with second clamping head is connected, the device still includes arc slide rail, cutting knife and handle, be equipped with first slider on the linear slide rail, first slider slides along linear slide rail, be equipped with on the first slider the arc slide rail, the arc slide rail slides along linear slide rail along with first slider together, arc slide rail sliding connection has the second slider, the second slide block moves along the arc slide rail in an arc way, the second slide block is connected with the handle, the lower end of the handle is provided with the cutting knife, the cutting knife is provided with a cutting part for cutting into rubber barks, the cutting part is inserted into the rubber barks and then shakes the handle, so that the handle drives the second slide block to slide along the arc slide rail, or drives the arc slide rail to move along the linear slide rail along the first slide block, the circle center of the movement track of the second slide block is positioned in the middle of the cutting part, the second slide block drives the cutting knife to rotate when sliding along the arc slide rail, the rotating center of the cutting knife coincides with the circle center of the movement track of the second slide block, the linear slide rail is provided with a plurality of tooth grooves, the first slide block is provided with a non-return tooth block matched with the tooth grooves, the first clamping head and the second clamping head comprise a 'mouth' -shaped rod, clamping blocks and a screw rod, the bottom of the 'mouth' -shaped rod is provided with a cutting edge, the clamping blocks are slidably connected in the 'mouth' -shaped rod, the screw rod is in threaded connection with the upper portion of the 'mouth' -shaped rod, the clamping blocks are pushed to move towards the bottom of the 'mouth' -shaped rod when the screw rod rotates, the hoop comprises a first C-shaped ring, a second C-shaped ring and a bolt, the first C-shaped ring is fixedly connected with the linear slide rail, the second C-shaped ring is connected with the first C-shaped ring through the bolt, the cutting tool is provided with 4 cutting parts which are arranged along the direction perpendicular to the linear slide rail, the bottom of the cutting parts is provided with a tip, the cutting tool is used for simultaneously cutting bark when operated, 4 parallel cuts are cut on the bark of a rubber tree, the cutting tool is used for cutting the upper portion of the bark of the rubber tree when rotating along the clockwise direction, and the cutting tool is used for cutting the lower portion of the bark of the rubber tree when rotating along the anticlockwise direction.
2. The rubber bark tensile strength testing device according to claim 1, wherein the telescopic rod is an electric telescopic rod, a motor of the electric telescopic rod is a stepping motor, the stepping motor and the tension detector are both in signal connection with a controller, and the controller is in signal connection with a display.
3. The rubber bark tensile strength testing device according to claim 1, wherein the arc-shaped sliding rail comprises a first rail and a second rail, an arc-shaped sliding groove is arranged between the first rail and the second rail, and the second sliding block is slidably connected in the arc-shaped sliding groove.
4. A rubber bark tensile strength testing device according to claim 3, wherein the second track is provided with a mounting frame, the mounting frame is slidably connected with a sliding rod, the sliding rod slides along the mounting frame in a direction perpendicular to the linear sliding rail, one end of the sliding rod, facing the linear sliding rail, is provided with the non-return tooth block, and the mounting frame is provided with a spring for pushing the non-return tooth block to move towards the tooth slot.
5. The rubber bark tensile strength testing device according to claim 1, wherein the non-return tooth block comprises a movable block and one-way convex teeth arranged at the bottom of the movable block, and the tooth slot is a one-way tooth slot.
6. The rubber bark tensile strength testing device according to claim 1, wherein a sleeve is rotatably connected above the second sliding block, an L-shaped rod is arranged below the second sliding block, the handle is slidably connected with the first sliding block, the sleeve is in threaded connection with the handle, a groove is formed in the side face of the handle below the first sliding block, the side face of the groove is a plane, and the lower end of the L-shaped rod is in butt joint with the side face of the groove.
7. A testing method using a rubber bark tensile strength testing apparatus as set forth in claim 2, comprising the steps of:
S1, inserting the cutting part into rubber bark, then slightly shaking the handle forwards by a small extent, rotating the handle clockwise, enabling the cutting blade to rotate in the clockwise direction, cutting the upper part of the rubber bark by the cutting blade, then slightly shaking the handle backwards, enabling the cutting blade to rotate in the anticlockwise direction, cutting the lower part of the rubber bark by the cutting blade, greatly shaking the handle forwards and backwards after the length to be cut is enlarged, also enabling the cutting blade to rotate in the clockwise direction when the handle is greatly shaken forwards, enabling the cutting distance of the cutting blade to the upper rubber bark to be larger, pulling the handle forwards after the second slider moves forwards to the limit position, driving the first slider to move forwards by a small extent through the handle, further cutting the upper rubber bark, enabling the circle center of the second slider to move forwards, then greatly shaking the handle backwards, enabling the cutting blade to rotate in the anticlockwise direction, and enabling the cutting blade to cut the rubber bark to repeatedly move along the trunk of the lower part, wherein the rubber bark can be cut along the trunk repeatedly;
s2, utilizing the first clamping head and the second clamping head to clamp different positions of the rubber bark respectively, operating the electric telescopic rod to enable the electric telescopic rod to stretch, enabling the electric telescopic rod to drive the first clamping head and the second clamping head to be far away from the stretched rubber bark, and detecting the tensile force by the tensile force detector in the stretching process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111101756.1A CN113933151B (en) | 2021-09-18 | 2021-09-18 | Rubber bark tensile strength testing device and testing method |
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