String stringing method for string string type semi-rigid substrate

Abstract

A string stringing method for a string string type semi-rigid substrate. After pretreatment and performance verification of the string stringing process parts according to predetermined process parameters, the product string stringing is installed on the pretreatment tool and placed in an oven for heating and drying. Loading pretreatment, during string tensioning, install the semi-rigid substrate on the string tensioning tool with the help of the pressing point positioning mechanism and fix one end of the tension string on the semi-rigid substrate, and install the other ends of the adjacent two tension strings on the same tension adjustment device , by adjusting the tension adjustment device to achieve tension on all the strings of the semi-rigid substrate, and at the same time install the tooling strings on the substrate frame on the side of the fixed end of every two strings and fix them on the tooling strings after applying 2 times the tension of the strings On the fixing device, after standing for a certain period of time and the tension value is stable, glue and fix each string and the substrate, and take out the semi-rigid substrate after curing. With the help of a tension tester that has been calibrated by the string tension standard tooling, perform a tension test on all span strings of the semi-rigid substrate.

Description

technical field [0001] The invention relates to a string stringing method of a string string type semi-rigid substrate, belonging to the field of frame composite material structure manufacturing. Background technique [0002] The stringed semi-rigid substrate is a brand-new structural form, mainly to meet the power supply (≥25kw) requirements of the new generation of ultra-large-capacity geostationary orbit satellite platforms, the requirements for weight reduction of the solar wing, and the high deployment stiffness of the solar wing. It is mainly composed of a substrate frame, a string positioning bracket and a Kevlar fiber braided string, all of which are assembled into one body by adhesive bonding. [0003] Kevlar fiber braided string adopts the structure of unidirectional core bundle (rope core) + braided sheath (rope sheath), but due to the molecular segment movement of the fiber material and the microbending of the unidirectional core bundle caused by the weaving proc...

AI Technical Summary

Problems solved by technology

[0006] 1) The large-load pre-tensioning treatment method at room temperature is more effective for ropes used at room temperature, but when the rope experiences high and low temperature environments, its length still changes, which cannot meet the actual working conditions of semi-rigid substrates;

[0007] 2) Multiple high and low temperature cycles and multiple variable load pretensioning methods have high requirements for pretreatment equipment, processing cycle and cost, and are not suitable for string stringing of semi-rigid substrates with long single size and large batches;

[0009] 1) The strings are stretched in different areas, resulting in uneven tension of the strings on the whole board;

[0010] 2) The influence of the deformation of the frame under load on the string tension is not considered, and the string tension of the substrate after forming is small and the uniformity is poor;

[0011] 3) The local deformation of the semi-rigid substrate frame caused by the tension of the string is not considered, which may easily cause the dimensional accuracy of the important mechanical interface of the substrate to be out of tolerance

[0012] 4) The friction between the string and the string support cannot be removed, which affects the tension uniformity of the string on the whole board;

[0013] 5) During the tensioning process, the tension cannot be monitored and adjusted in real time

[0015] 1) Limited by human factors and measurement system errors, the measurement accuracy of the weight hanging method is poor, and the operation process is cumbersome, the amount of recording and calculation data is large, and the measurement cycle is long;

[0016] 2) The tension tester is mainly suitable for the rope structure of the open system. It is not suitable for the structure of the string between the two string brackets of the semi-rigid substrate. The measured results cannot represent the real string tension.

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