CN112146804B - String tensioning method of string tensioning type semi-rigid substrate - Google Patents
String tensioning method of string tensioning type semi-rigid substrate Download PDFInfo
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- CN112146804B CN112146804B CN202010868839.2A CN202010868839A CN112146804B CN 112146804 B CN112146804 B CN 112146804B CN 202010868839 A CN202010868839 A CN 202010868839A CN 112146804 B CN112146804 B CN 112146804B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
Abstract
A method for straining a string-type semi-rigid substrate comprises pretreating a string-straining craft piece according to predetermined process parameters and verifying the performance of the string-straining craft piece, installing the product in a pre-treatment tool by using a guy wire, placing the product in an oven for heating and loading pre-treatment, installing a semi-rigid substrate in the guy wire tool by using a pressing point positioning mechanism in the guy wire process, fixing one end of the guy wire on the semi-rigid substrate, installing the other ends of two adjacent guy wires on the same tension adjusting device, the tension adjusting device is adjusted to realize the tension application of all the guy wires of the semi-rigid substrate, and simultaneously, mounting a tooling string on the frame of the substrate on one side of each two strung ends to be fixed, applying 2 times of strung tension, fixing the strung strings on a tooling strung string fixing device, standing for a certain time, bonding and fixing each strung string and the substrate after the tension value is stable, and taking out the semi-rigid substrate after curing. And carrying out tension test on all span straining strings of the semi-rigid substrate by using a tension tester which is glued by a straining string tension quasi-tool.
Description
Technical Field
The invention relates to a stringing method of a strung semi-rigid substrate, belonging to the field of manufacturing of frame composite material structures.
Background
The strung semi-rigid substrate is a brand-new structure, and mainly meets the requirements of a new generation of ultra-large capacity static orbit satellite platform on power supply power (more than or equal to 25kw), solar wing weight reduction and solar wing high unfolding rigidity. The tension wire fixing device mainly comprises a base plate frame, a tension wire positioning support and Kevlar fiber woven tension wires, and the tension wire positioning support and the Kevlar fiber woven tension wires are all assembled into a whole through adhesive bonding.
The Kevlar fiber braided string adopts a structure of braiding a unidirectional core bundle (rope core) and a braided shell (rope sheath), but the length size of the Kevlar fiber braided string can be changed under the action of high and low temperature environments and mechanical loads due to the molecular chain motion of a fiber material and the micro bending of the unidirectional core bundle caused by the braiding process, so that the string needs to be pretreated before use to eliminate the influence. Meanwhile, 2000 solar cells on each substrate are all fixed on 800 criss-cross guy wires, so that all the cells of the substrate do not collide with an adjacent substrate in a satellite launching stage, and the guy wire tension test is required to be carried out on the substrate after the guy wires are tightened so as to ensure that the guy wire tension and the tension deviation of the whole substrate meet the design requirements.
The string tightening process of the string tightening type semi-rigid substrate is that firstly, the string tightening is preprocessed, then, the string tightening is kept under certain tension pre-tightening load, the two ends of the string tightening and the string tightening support at the corresponding position of the frame are glued and fixed, and finally, all the string tightening of the substrate are tested in terms of tension and uniformity.
At present, two pretreatment methods for aramid woven ropes with higher dimensional accuracy are generally adopted: (1) pre-tensioning the ropes under large load at room temperature for a long time; (2) and (4) performing high-low temperature circulation for multiple times and variable load pretensioning for multiple times. The disadvantages of using the above-described string-tightening pretreatment method are as follows:
1) the pre-tensioning treatment method for the large load at room temperature has a good effect on the rope used at room temperature, but the length of the rope still changes after the rope is subjected to high-temperature and low-temperature environments, so that the actual working condition of the semi-rigid substrate cannot be met;
2) the pretensioning method for multiple times of high and low temperature circulation and multiple times of variable load has higher requirements on pretreatment equipment, treatment period, cost and the like, and is not suitable for straining a single semi-rigid substrate with a long size and large batch;
the conventional method for tightening strings is to place a base plate frame horizontally and fix the periphery of the base plate frame, fix one end of each tightening string with the frame, use a heavy object hanger to apply tension to the tightening strings at the other end of each tightening string, and then perform gluing and fixing on the tightening strings. For a semi-rigid substrate with a large size, due to the limitation of tool rigidity and operation space, only zones can be adopted for string tensioning. The disadvantages of using the above-described stringing method are as follows:
1) the tension of the whole plate string is not uniform due to the zonal string straining;
2) the influence of the frame deformation under load on the tension of the stretched string is not considered, and the stretched string tension of the molded substrate is small and poor in uniformity;
3) local deformation of a semi-rigid substrate frame caused by tension of a guy wire is not considered, so that the dimensional accuracy of an important mechanical interface of the substrate is easily out of tolerance
4) The friction between the guy wires and the guy wire brackets cannot be removed, so that the tension uniformity of the guy wires of the whole plate is influenced;
5) in the string stretching process, the tension cannot be monitored and adjusted in real time.
The tension testing process of the taut semi-rigid substrate is used for detecting the tension of the taut and the uniformity of the tension of the taut of the whole plate so as to judge whether the taut and the uniform tension meets the requirements of design indexes. At present, the tension test method of the common rope mainly comprises two methods: (1) the weight hanging method is characterized in that weights with certain mass are hung on a measured guy wire, and corresponding tension values are calculated by measuring the displacement difference before and after hanging the weights with the help of a height gauge or a theodolite; (2) tension tester method, which uses tension tester to measure the tension of string. The disadvantages of the two rope tension test methods described above are as follows:
1) limited by human factors and errors of a measuring system, the measuring precision of the weight hanging method is poor, the operation process is complicated, the recording and calculating data volume is large, and the measuring period is long;
2) the tension tester is mainly suitable for a rope structure of an open system, is not suitable for a structure of a guy between two guy brackets of a semi-rigid substrate, and a measured result cannot represent the real guy tension.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for tightening semi-rigid substrate comprises the steps of carrying out pretreatment and performance verification on a tightening process piece according to predetermined process parameters, mounting a product on a pretreatment tool by using a tightening string, placing the product in an oven for heating and loading pretreatment, mounting the semi-rigid substrate on the tightening string tool by using a pressing point positioning mechanism in the tightening process, fixing one end of the tightening string on the semi-rigid substrate, mounting the other end of two adjacent tightening strings on the same tension adjusting device, carrying out tension application on all the tightening strings of the semi-rigid substrate by adjusting the tension adjusting device, simultaneously mounting tool strings on a substrate frame at one side of each two tightening string to be fixed ends, applying 2 times of tightening string tension, fixing the tightening strings on a tool tightening string fixing device, standing for a certain time, and carrying out adhesive bonding fixation on each tightening string and the substrate after the tension value is stable, and taking out the semi-rigid substrate after curing. And carrying out tension test on all span straining strings of the semi-rigid substrate by using a tension tester which is glued by a straining string tension quasi-tool.
The purpose of the invention is realized by the following technical scheme:
a method for stringing a strung semi-rigid substrate, comprising the steps of:
step 1: determining technological parameters of string tightening pretreatment;
step 2: randomly taking 3 stretched strings in the stretched strings to be processed, installing the stretched strings in a stretched string pretreatment tool and putting the stretched strings in an oven, wherein the stretched string pretreatment tool is used for loading loads on the stretched strings to be processed and carrying out pretreatment according to the process parameters determined in the step 1; obtaining a string stretching craft piece;
and step 3: placing the string stretching craft piece in a closed container with a drying agent, and freely placing for at least 24 hours;
and 4, step 4: manufacturing a sample by using 3 string stretching process pieces, and turning to the step 5 when the 3 string stretching process pieces meet the length change requirement;
and 5: sequentially mounting the rest stretched strings to be processed on a stretched string pretreatment tool to complete mechanical loading, putting the stretched strings into an oven, and performing pretreatment according to the process parameters determined in the step 1;
step 6: mounting a semi-rigid substrate frame on a string tightening tool, wherein the string tightening tool is used for mounting the processed string tightening on the semi-rigid substrate frame, can be used for positioning the semi-rigid substrate frame, and is used for fixing the processed string tightening on the semi-rigid substrate frame under the condition of loading;
and 7: after tension application of the whole guy wire is finished, standing, checking tension readings of all tension adjusting devices on the guy wire tool, and adjusting all guy wire tension values again according to guy wire required values;
and 8: adhering and fixing the semi-rigid substrate frame and the guy wires by using an adhesive, removing the guy wire tool after the adhesive is cured, and taking out the semi-rigid substrate;
and step 9: calibrating the tension tester by utilizing the calibrated string;
step 10: and (3) carrying out tension test and recording on the strung string of the semi-rigid substrate by using the calibrated tension tester, and confirming that the strung string tension of the semi-rigid substrate is within a preset tension value range.
In the string tightening method of the string tightening type semi-rigid substrate, preferably, the technological parameters of the string tightening pretreatment comprise temperature and loading load; the temperature value is 20 ℃ higher than the actual use temperature, and the loading load value is 20% of the string-tightening fracture load.
Preferably, the method for manufacturing the test sample comprises the following steps: the effective test length of the string stretching process piece is 1000mm, the string stretching process piece is installed in a high-low temperature box and is loaded with 5 times of the load of the actual tension value of the semi-rigid substrate string stretching, the test is carried out according to the high-low temperature circulation requirement of the product, and the length change of the string stretching process piece before and after the test is measured.
Preferably, when the length change of all the 3 string stretching technical pieces is not more than two thousandths, the string stretching method of the string stretching type semi-rigid substrate meets the length change requirement.
In the string stretching method of the string-stretched semi-rigid substrate, preferably, between the step 5 and the step 6, the treated string is placed in a closed container with a drying agent for storage and standby.
In the above method for stretching a strung semi-rigid substrate, preferably, the method for fixing the treated strung to the semi-rigid substrate frame under a load includes:
step 61: one end of a string is fixed on one side of the string tightening tool, and the other end of the string tightening tool is connected with a tension adjusting device of the string tightening tool and applies a pulling force to a required value;
step 62: and pulling a tooling string at the other side of the string tensioning tooling, adjusting the tension to be 2 times of the required value of the product, and fixing the tooling string at one side of the string tensioning tooling by using a fixing device of the tooling string.
Preferably, the method for calibrating the tension tester by using the calibrated string tensioning comprises the following steps:
step 91: firstly, 1 calibrated guy wire which has the same specification with the semi-rigid substrate and completes the same treatment is arranged on a guy wire tension calibration tool, and two ends of the calibrated guy wire are fixed on a second calibrated fixed clamping block;
and step 92: after a calibration tension adjusting device of the guy wire tension adjusting tool applies preset tension to the calibrated guy wire, the calibrated guy wire is fixed by using a guy wire fixing clamping block and a calibration fixing block II to form a closed system, and then the guy wire span required by a semi-rigid substrate product is achieved by adjusting the position of the calibration fixing interlayer I;
step 93: adjusting an included angle between tension wheels of the tension tester to enable the difference value between the tension of the calibrated tension of the span measured by the tension tester in the step 92 and the tension value of the calibrated tension adjusting device to be smaller than 0.1N;
step 94: changing the preset tension of the calibrated string, and performing the steps 92 and 93 again to calibrate the measurement result of the tension tester.
Preferably, the string tightening tool comprises a tool frame body, a hinge positioning mechanism, a pressing point positioning mechanism, a frame reinforcing beam base plate, a frame base plate, a tension adjusting device mounting support, a tension adjusting device, a tool string fixing device and a tool string;
the tool frame body comprises a rectangular frame and a plurality of cross-shaped main beams arranged in the rectangular frame; the hinge positioning mechanism is installed on the frame, the frame base plate is installed on the hinge positioning mechanism, and the pressing point positioning mechanism and the frame reinforcing beam base plate are both installed on the cross-shaped intersection point of the main beam; the semi-rigid substrate to be processed is placed in the tool frame body and positioned above the frame reinforcing beam base plate and the frame base plate, a hinge of the semi-rigid substrate to be processed is tightly attached and fixed with the hinge positioning mechanism, and a pressing point positioning mechanism of the semi-rigid substrate to be processed are tightly attached and fixed;
the tension adjusting device mounting brackets and the tooling string fixing devices are both arranged on the frame, and each tension adjusting device mounting bracket is provided with a tension adjusting device;
one end of the tooling string is connected with the tooling string fixing device, and the other end of the tooling string is connected with the side edge of the semi-rigid substrate to be processed, which is far away from the tooling string fixing device.
Preferably, the tension adjusting device comprises a pulley assembly, a mounting base, a screw, a slider, a tension meter and a rocking handle;
the installation base is connected with the tension adjusting device installation support, the rocking handle is installed on the installation base through the screw rod, the sliding block is fixedly connected with the screw rod, the sliding block is installed on the installation base in a sliding mode, the tension meter is installed on the sliding block, and the pulley assembly is installed on the tension meter.
Preferably, the string to be processed is wound around the diameter of the pulley assembly and is equal to the distance between two adjacent string to be processed.
Compared with the prior art, the invention has the following beneficial effects:
(1) by adopting the invention, the strung semi-rigid substrate can realize one-time strung of the whole plate, the production efficiency of the substrate is obviously improved, and meanwhile, the tension uniformity of the strung reaches +/-5 percent and is better than the requirement of +/-10 percent of the design index;
(2) the plane traction is adopted to apply the string stretching tension, so that the string stretching tension is prevented from applying an additional moment action to the semi-rigid substrate frame to cause deformation of the semi-rigid substrate frame, and meanwhile, the positioning modes of the pressing points and the hinges are adopted, so that the important interface precision of the substrate is ensured not to change before and after string stretching;
(3) by adopting the tension adjusting device, the tension change in the string tightening process can be displayed and adjusted in real time, and the problem that the product performance does not reach the standard due to the fact that tension is not applied to the product in place is avoided;
(4) the semi-rigid substrate of the strung string pretreated by the method has small tension change of strung string tension in ground tests and in high and low temperature environments of an orbit, and the problem of obvious reduction of the tension in the past model is avoided;
(5) the string tightening pretreatment method is suitable for large-batch string tightening with a long single size, and has no high requirements on pretreatment equipment, treatment period and cost;
(6) the tension testing method is suitable for the closed rope system of the tension between two tension brackets of the semi-rigid substrate, and solves the problem that a common tension tester cannot measure the tension;
(7) the tension testing method can effectively avoid human factors and errors caused by a measuring system, and is high in measuring precision and simple and convenient in operation process.
Drawings
FIG. 1 is a schematic view of a string tightening pretreatment tool.
Fig. 2 is a partial structural schematic diagram of the string stretching tool.
Fig. 3 is a schematic view of a string tensioning force calibration tool.
FIG. 4 is a schematic structural view of the string tightening tool;
FIG. 5 is a schematic view of a tension adjusting device;
FIG. 6 is a schematic structural view of a hinge positioning mechanism;
fig. 7 is a schematic structural view of the pressing point positioning mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A method for stringing a strung semi-rigid substrate, comprising the steps of:
step 1: determining technological parameters of string tightening pretreatment;
step 2: randomly taking 3 stretched strings in the stretched strings to be processed, installing the stretched strings in a stretched string pretreatment tool and putting the stretched strings in an oven, wherein the stretched string pretreatment tool is used for loading loads on the stretched strings to be processed and carrying out pretreatment according to the process parameters determined in the step 1; obtaining a string stretching craft piece;
and step 3: placing the string stretching craft piece in a closed container with a drying agent, and freely placing for at least 24 hours;
and 4, step 4: manufacturing a sample by using 3 string stretching process pieces, and turning to the step 5 when the 3 string stretching process pieces meet the length change requirement;
and 5: sequentially mounting the rest stretched strings to be processed on a stretched string pretreatment tool to complete mechanical loading, putting the stretched strings into an oven, and performing pretreatment according to the process parameters determined in the step 1;
step 6: mounting a semi-rigid substrate frame on a string tightening tool, wherein the string tightening tool is used for mounting the processed string tightening on the semi-rigid substrate frame, can be used for positioning the semi-rigid substrate frame, and is used for fixing the processed string tightening on the semi-rigid substrate frame under the condition of loading;
and 7: after tension application of the whole guy wire is finished, standing, checking tension readings of all tension adjusting devices on the guy wire tool, and adjusting all guy wire tension values again according to guy wire required values;
and 8: adhering and fixing the semi-rigid substrate frame and the guy wires by using an adhesive, removing the guy wire tool after the adhesive is cured, and taking out the semi-rigid substrate;
and step 9: calibrating the tension tester by utilizing the calibrated string;
step 10: and (3) carrying out tension test and recording on the strung string of the semi-rigid substrate by using the calibrated tension tester, and confirming that the strung string tension of the semi-rigid substrate is within a preset tension value range.
As a preferred scheme of the invention, the technological parameters of the guy wire pretreatment comprise temperature and loading load; the temperature value is 20 ℃ higher than the actual use temperature, and the loading load value is 20% of the string-tightening fracture load.
As a preferred embodiment of the present invention, a method for preparing a sample comprises: the effective test length of the string stretching process piece is 1000mm, the string stretching process piece is installed in a high-low temperature box and is loaded with 5 times of the load of the actual tension value of the semi-rigid substrate string stretching, the test is carried out according to the high-low temperature circulation requirement of the product, and the length change of the string stretching process piece before and after the test is measured.
As a preferable scheme of the invention, when all 3 stringing process pieces meet the requirement that the length change does not exceed two thousandths, the requirement of length change is met.
As a preferable scheme of the invention, between the step 5 and the step 6, the treated guy wires are put in a closed container with a desiccant for storage and standby.
As a preferred aspect of the present invention, a method for fixing a treated guy wire to a semi-rigid substrate frame under a load includes:
step 61: one end of a string is fixed on one side of the string tightening tool, and the other end of the string tightening tool is connected with a tension adjusting device of the string tightening tool and applies a pulling force to a required value;
step 62: and pulling a tooling string at the other side of the string tensioning tooling, adjusting the tension to be 2 times of the required value of the product, and fixing the tooling string at one side of the string tensioning tooling by using a fixing device of the tooling string.
As a preferred scheme of the invention, the method for calibrating the tension tester by utilizing the calibrated guy wire comprises the following steps:
step 91: firstly, 1 calibrated guy wire which has the same specification with the semi-rigid substrate and completes the same treatment is arranged on a guy wire tension calibration tool, and two ends of the calibrated guy wire are fixed on a second calibrated fixed clamping block;
and step 92: after a calibration tension adjusting device of the guy wire tension adjusting tool applies preset tension to the calibrated guy wire, the calibrated guy wire is fixed by using a guy wire fixing clamping block and a calibration fixing block II to form a closed system, and then the guy wire span required by a semi-rigid substrate product is achieved by adjusting the position of the calibration fixing interlayer I;
step 93: adjusting an included angle between tension wheels of the tension tester to enable the difference value between the tension of the calibrated tension of the span measured by the tension tester in the step 92 and the tension value of the calibrated tension adjusting device to be smaller than 0.1N;
step 94: changing the preset tension of the calibrated string, and performing the steps 92 and 93 again to calibrate the measurement result of the tension tester.
Example (b):
a method for stringing a strung semi-rigid substrate, comprising the steps of:
step 1: according to a semi-rigid substrate ground test, an actual service space temperature environment and a guy string tension requirement, processing parameters of aramid fiber braided rope (namely guy string) pretreatment are formulated, and the method specifically comprises the following steps: the pretreatment temperature is 20 ℃ higher than the actual use temperature, and the loading load is 20% of the string-tightening breaking load;
step 2: randomly taking 3 stretched strings in the stretched strings to be processed, installing the stretched strings in a stretched string pretreatment tool and putting the stretched strings in an oven, wherein the stretched string pretreatment tool is used for loading loads on the stretched strings to be processed and carrying out pretreatment according to the process parameters determined in the step 1; obtaining a string stretching craft piece; the string tightening pretreatment tool is shown in figure 1;
and step 3: placing the string stretching craft piece in a closed container with a drying agent, and freely placing for 24 hours;
and 4, step 4: manufacturing a sample by utilizing 3 string stretching process pieces: the effective test length of the stringing process piece is required to be 1000mm, the stringing process piece is installed in a high-low temperature box and is loaded with 5 times of the load of the actual tension value of the semi-rigid substrate stringing, the test is carried out according to the high-low temperature circulation requirement of the product, the length change of the stringing process piece before and after the test is measured, and when 3 stringing process pieces meet the length change requirement (the length change is not more than two thousandths required), the step 5 is carried out;
and 5: sequentially mounting the rest stretched strings to be processed on a stretched string pretreatment tool to complete mechanical loading, putting the stretched strings into an oven, and performing pretreatment according to the process parameters determined in the step 1;
step 6: placing the treated string in a closed container with a drying agent for storage for later use;
and 7: mounting a semi-rigid substrate frame on a string stretching tool, wherein the part of the string stretching tool is shown in figure 2, the string stretching tool is used for mounting the treated strung strings on the semi-rigid substrate frame, and can be used for positioning the semi-rigid substrate frame and fixing the treated strung strings on the semi-rigid substrate frame under the condition of loading; specifically, the semi-rigid substrate frame is positioned (i.e. positioned horizontally) by using a pressing point positioning mechanism 103 of the string stretching tool, and the height of a frame base plate 105 of the string stretching tool is adjusted to ensure that the frame base plate is contacted with the semi-rigid substrate frame (i.e. positioned in height);
and 8: one end (end A) of a string is fixed on one side (side A) of the string tightening tool, and the other end (end B) of the string tightening tool is connected with a tension adjusting device 108 and applies a pulling force to a required value;
and step 9: pulling a tooling string at the side B of the string tensioning tooling, adjusting the tension to be 2 times of the required value of a product, and fixing the tooling string at the side A of the string tensioning tooling by using a fixing device 1010 of the tooling string;
step 10: after tension application of the whole plate of the guy wires is finished, standing for 24 hours, checking the tension reading of each tension adjusting device 108 on the guy wire tightening tool, and adjusting all guy wire tension values again according to respective required values;
step 11: bonding and fixing the semi-rigid substrate frame and the guy wires by using an adhesive, removing each loading tool and each positioning tool (namely removing the guy wire tool) after curing, and taking out the semi-rigid substrate (the semi-rigid substrate frame and the guy wires are bonded to form the semi-rigid substrate);
step 12: before testing the tension of the stretched-string type semi-rigid substrate, firstly installing 1 calibrated stretched string 14 which has the same specification with the semi-rigid substrate and completes the same treatment on a stretched-string tension calibration tool (the stretched-string tension calibration tool is used for calibrating a tension tester), wherein the stretched-string tension calibration tool is shown in fig. 3, and two ends of the calibrated stretched string 14 are fixed on a second calibrated fixed clamping block 16 (the two ends of the calibrated stretched string 14 are fixed on the second calibrated fixed clamping block 16 after bypassing the calibration tension adjusting device 12);
step 13: after a calibration tension adjusting device 12 of the tension calibration tool for adjusting the tension of the guy wire applies preset tension to a calibrated guy wire 14, the guy wire is fixed by using a guy wire fixing clamping block 13 and a calibration fixing block II 16 to form a closed system, and then the guy wire span required by a semi-rigid substrate product is achieved by adjusting the position of a calibration fixing interlayer I15;
step 14: the difference value between the tension of the tension tester to the corresponding span tension string and the tension value of the calibration tension adjusting device 12 is smaller than 0.1N by adjusting the included angle between the tension wheels of the tension tester;
step 15: changing the preset tension of the calibrated string stretching 14, repeating the step 13 and the step 14, and verifying the parameters of the tension tester;
step 16: carrying out tension test and recording on the strung string of the semi-rigid substrate by using the calibrated tension tester, and confirming that the strung string tension of the semi-rigid substrate is within a preset tension value range; tension tests of different span guy wires are tested and recorded according to the method from step 12 to step 16.
The string stretching pretreatment tool comprises a weight 1, a pulley assembly 2, a temperature sensor 3, a string stretching pretreatment frame 4 and a string stretching 5. The string stretching pretreatment frame 4 comprises a rectangular frame and a plurality of cross-shaped main beams installed in the rectangular frame, the pulley assemblies 2 are installed on the frame, the temperature sensors 3 are installed at different positions of the top of the frame, the strings to be treated 5 are installed on the pulley assemblies 2 at two ends of the pretreatment frame 4, and the weights 1 are connected with two ends of the strings to be treated 5.
The string stretching tension calibrating tool comprises a calibrating tool bottom plate 11, a tension adjusting device 12, a string stretching fixing clamping block 13, a calibrating string stretching 14, a calibrating fixing clamping block I15 and a calibrating fixing clamping block II 16. The calibration tool base plate 11 comprises a rigid flat plate and an installation base, the tension adjusting device 12 is installed on the installation base on the tool base plate 11, the string stretching fixing clamp block 13 is installed on the tool base plate 11, the calibration clamp block I15 is installed on the tool base plate 11, the calibration fixed clamp block II 16 is installed on the tool base plate 11, two ends of the calibration string stretching 15 are installed on the fixed clamp block II 16 and are installed on a pulley component of the tension adjusting device 12 at the same time, and after the tension is adjusted to a required value, the string stretching 15 is fixed at the string stretching fixing clamp block 13.
The string stretching tool comprises a tool frame body 101, a hinge positioning mechanism 102, a pressing point positioning mechanism 103, a frame reinforcing beam base plate 104, a frame base plate 105, a tension adjusting device mounting bracket 106, a corner wheel 107, a tension adjusting device 108, an adjustable supporting seat 109, a tool string fixing device 1010 and a tool string. As shown in fig. 4-7.
The tool frame body 101 comprises a rectangular frame and a plurality of cross-shaped main beams arranged in the rectangular frame; the hinge positioning mechanism 102 is installed on the frame, the frame base plate 105 is installed on the hinge positioning mechanism 102, and the pressing point positioning mechanism 103 and the frame reinforcing beam base plate 104 are both installed on the cross-shaped intersection point of the main beam; the semi-rigid substrate to be processed is placed in the tool frame body 101 and is positioned on the frame reinforcing beam base plate 104 and the frame base plate 105, the hinge of the semi-rigid substrate to be processed is tightly attached and fixed with the hinge positioning mechanism 102, and the pressing point of the semi-rigid substrate to be processed and the pressing point positioning mechanism 103 are tightly attached and fixed.
A plurality of tension adjusting device mounting brackets 106 and a plurality of tooling string fixing devices 1010 are arranged on the frame, and each tension adjusting device mounting bracket 106 is provided with one tension adjusting device 108;
one end of the tooling string is connected with the tooling string fixing device 1010, and the other end of the tooling string is connected with the side edge of the semi-rigid substrate to be processed, which is far away from the tooling string fixing device 1010.
The tension adjusting device 108 comprises a pulley assembly 1011, a mounting base 1012, a screw 1013, a slide 1014, a tension meter 1015 and a rocking handle 1016; the mounting base 1012 is coupled to the tensioning device mounting bracket 106, the rocker 1016 is mounted to the mounting base 1012 by a screw 1013, a slider 1014 is fixedly coupled to the screw 1013, the slider 1014 is slidably mounted to the mounting base 1012, a tension gauge 1015 is mounted to the slider 1014, and a pulley assembly 1011 is mounted to the tension gauge 1015.
Both ends of the guy wire to be processed are fixed on one side edge of the semi-rigid substrate to be processed, the middle part of the guy wire to be processed bypasses a pulley assembly 1011 of a tension adjusting device 108, and the tension adjusting device 108 is positioned on the other side edge of the semi-rigid substrate to be processed. The diameter of the guy wire to be processed which bypasses the pulley assembly 1011 is equal to the distance between two adjacent guy wires to be processed.
The tension adjusting device mounting brackets 106 and the tooling string fixing devices 1010 are mounted at intervals.
The tool frame body 101 is arranged on the adjustable supporting seat 109; the horn gear 107 is mounted on an adjustable support 109.
The hinge positioning mechanism 102 comprises a main beam supporting U-shaped groove 1017, a hinge positioning block 1018, a first positioning pin 1019, a second positioning pin 1020, a frame hinge pad 1021, and a frame supporting U-shaped groove 1022, as shown in fig. 6; the frame hinge pad plate 1021 is connected with the hinge positioning block 1018, the main beam support U-shaped groove 1017 and the frame support U-shaped groove 1022 are installed on the frame hinge pad plate 1021, and the positioning pin II 1020 is connected with the hinge positioning block 1018 and the corresponding hinge interface of the substrate product. The alignment pin one 1019 interfaces with the hinge alignment block 1018 and the corresponding hinge of the substrate product.
The pressing point positioning mechanism 103 comprises a frame pressing point base plate 1023, a replaceable pressing point cushion block 1024, a first main beam supporting U-shaped groove 1025, a positioning pin 1026 and a second main beam supporting U-shaped groove 1027, as shown in FIG. 7; frame compression point backing plate 1023 is connected with interchangeable compression point cushion 1024, and girder supports U type groove one 1025 and girder supports U type groove two 1027 and installs on frame compression point backing plate 1023, and locating pin 1026 and frame compression point backing plate 1023 and the corresponding compression point interface connection of base plate product.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (10)
1. A method for stringing a strung semi-rigid substrate, comprising the steps of:
step 1: determining technological parameters of string tightening pretreatment;
step 2: randomly taking 3 stretched strings in the stretched strings to be processed, installing the stretched strings in a stretched string pretreatment tool and putting the stretched strings in an oven, wherein the stretched string pretreatment tool is used for loading loads on the stretched strings to be processed and carrying out pretreatment according to the process parameters determined in the step 1; obtaining a string stretching craft piece;
and step 3: placing the string stretching craft piece in a closed container with a drying agent, and freely placing for at least 24 hours;
and 4, step 4: manufacturing a sample by using 3 string stretching process pieces, and turning to the step 5 when the 3 string stretching process pieces meet the length change requirement;
and 5: sequentially mounting the rest stretched strings to be processed on a stretched string pretreatment tool to complete mechanical loading, putting the stretched strings into an oven, and performing pretreatment according to the process parameters determined in the step 1;
step 6: mounting a semi-rigid substrate frame on a string tightening tool, wherein the string tightening tool is used for mounting the processed string tightening on the semi-rigid substrate frame, can be used for positioning the semi-rigid substrate frame, and is used for fixing the processed string tightening on the semi-rigid substrate frame under the condition of loading;
and 7: after tension application of the whole guy wire is finished, standing, checking tension readings of all tension adjusting devices on the guy wire tool, and adjusting all guy wire tension values again according to guy wire required values;
and 8: adhering and fixing the semi-rigid substrate frame and the guy wires by using an adhesive, removing the guy wire tool after the adhesive is cured, and taking out the semi-rigid substrate;
and step 9: calibrating the tension tester by utilizing the calibrated string;
step 10: carrying out tension test and recording on the strung string of the semi-rigid substrate by using the calibrated tension tester, and confirming that the strung string tension of the semi-rigid substrate is within a preset tension value range;
the string stretching pretreatment tool comprises weights (1), pulley assemblies (2), temperature sensors (3), a string stretching pretreatment frame (4) and strings (5); the string stretching pretreatment frame (4) comprises a rectangular frame and a plurality of cross-shaped main beams arranged in the rectangular frame, the pulley assemblies (2) are arranged on the frame of the string stretching pretreatment frame (4), the temperature sensors (3) are arranged at different positions of the top of the frame of the string stretching pretreatment frame (4), the string (5) to be treated is arranged on the pulley assemblies (2) at two ends of the pretreatment frame (4), and the weight (1) is connected with two ends of the string (5) to be treated;
the string tightening tool comprises a tool frame body (101), a hinge positioning mechanism (102), a pressing point positioning mechanism (103), a frame reinforcing beam base plate (104), a frame base plate (105), a tension adjusting device mounting bracket (106), a tension adjusting device (108), a tool string fixing device (1010) and a tool string;
the tool frame body (101) comprises a rectangular frame and a plurality of cross-shaped main beams arranged in the rectangular frame; the hinge positioning mechanism (102) is installed on a frame of the tool frame body (101), the frame base plate (105) is installed on the hinge positioning mechanism (102), and the pressing point positioning mechanism (103) and the frame reinforcing beam base plate (104) are installed on a cross-shaped intersection point of a main beam of the tool frame body (101); the semi-rigid substrate to be processed is placed in the tool frame body (101) and is positioned on the frame reinforcing beam base plate (104) and the frame base plate (105), a hinge of the semi-rigid substrate to be processed is tightly attached and fixed with the hinge positioning mechanism (102), and a pressing point of the semi-rigid substrate to be processed and the pressing point positioning mechanism (103) are tightly attached and fixed.
2. The method of claim 1, wherein the process parameters of the stretching pretreatment include temperature and loading load; the temperature value is 20 ℃ higher than the actual use temperature, and the loading load value is 20% of the string-tightening fracture load.
3. A method of tensioning a semi-rigid substrate in a tensioned configuration according to claim 1, wherein the method of fabricating the test piece comprises: the effective test length of the string stretching process piece is 1000mm, the string stretching process piece is installed in a high-low temperature box and is loaded with 5 times of the load of the actual tension value of the semi-rigid substrate string stretching, the test is carried out according to the high-low temperature circulation requirement of the product, and the length change of the string stretching process piece before and after the test is measured.
4. The method of claim 1, wherein the length change requirement is met when all 3 strung art pieces meet a length change of no more than two thousandths.
5. A method of tensioning a semi-rigid substrate in a tensioned configuration according to claim 1, wherein between steps 5 and 6 the treated tensioned string is stored in a sealed container with desiccant.
6. A method of bracing a strung semi-rigid substrate according to claim 1, wherein the method of securing the treated strung wire to the semi-rigid substrate frame under a load comprises:
step 61: one end of a string is fixed on one side of the string tightening tool, and the other end of the string tightening tool is connected with a tension adjusting device of the string tightening tool and applies a pulling force to a required value;
step 62: and pulling a tooling string at the other side of the string tensioning tooling, adjusting the tension to be 2 times of the required value of the product, and fixing the tooling string at one side of the string tensioning tooling by using a fixing device of the tooling string.
7. The method for straining a taut-wire type semi-rigid substrate according to any one of claims 1 to 6, wherein the method for calibrating the tension tester by using the calibrated taut wire comprises:
step 91: firstly, 1 calibrated guy wire which has the same specification with the semi-rigid substrate and completes the same treatment is arranged on a guy wire tension calibration tool, and two ends of the calibrated guy wire are fixed on a second calibrated fixed clamping block;
and step 92: after a calibration tension adjusting device of the guy wire tension adjusting tool applies preset tension to the calibrated guy wire, the calibrated guy wire is fixed by using a guy wire fixing clamping block and a calibration fixing block II to form a closed system, and then the guy wire span required by a semi-rigid substrate product is achieved by adjusting the position of the calibration fixing interlayer I;
step 93: adjusting an included angle between tension wheels of the tension tester to enable the difference value between the tension of the calibrated tension of the span measured by the tension tester in the step 92 and the tension value of the calibrated tension adjusting device to be smaller than 0.1N;
step 94: changing the preset tension of the calibrated string, and performing the steps 92 and 93 again to calibrate the measurement result of the tension tester.
8. The method of claim 1 to 6, wherein a plurality of tensioning device mounting brackets (106) and a plurality of tooling string fixing devices (1010) are mounted on the frame, and each tensioning device mounting bracket (106) is provided with a tensioning device (108);
one end of the tooling string is connected with the tooling string fixing device (1010), and the other end of the tooling string is connected with the side edge of the semi-rigid substrate to be processed, which is far away from the tooling string fixing device (1010).
9. The method of claim 8, wherein the tensioning device (108) comprises a pulley assembly, a mounting base (1012), a screw (1013), a slider (1014), a tension meter (1015), and a rocking handle (1016);
the tension adjusting device is characterized in that the mounting base (1012) is connected with the tension adjusting device mounting bracket (106), the rocking handle (1016) is mounted on the mounting base (1012) through a screw (1013), a sliding block (1014) is fixedly connected with the screw (1013), the sliding block (1014) is slidably mounted on the mounting base (1012), the tension meter (1015) is mounted on the sliding block (1014), and the pulley assembly is mounted on the tension meter (1015).
10. A method of bracing a strung semi-rigid substrate according to claim 8, wherein the strung to be processed is wound around the pulley assembly with a diameter equal to the distance between two adjacent strung to be processed.
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| US11420830B2 (en) * | 2017-08-10 | 2022-08-23 | Kongsberg Precision Cutting Systems Belgium Bv | Vacuum lifter |
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| JP4936843B2 (en) * | 2006-10-04 | 2012-05-23 | ジャパンパック株式会社 | Nipping packaging container for goods |
| CN106684183A (en) * | 2016-12-28 | 2017-05-17 | 中国电子科技集团公司第十八研究所 | Solar cell module for a strung semi-rigid panel |
| CN109244161A (en) * | 2018-09-18 | 2019-01-18 | 上海空间电源研究所 | A kind of semi-rigid solar cell modular structure and preparation method thereof |
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