Ningbo ShunYi Measuring Tools Co., Ltd. CONTACT US If you have any information or suggestions, we will get back to you as soon as possible. Telephone (+86 )-134 8666 5174 +86-574-62242878 Address No.22,Guangming Road, Lishan, Yuyao City, Zhejiang Province E-Mail [email protected] NEWS 1.Tape measure spring The tape measure spring is a component similar in shape to a steel tape measure, and is a single-layer open cylindrical shell. A hinge structure can be designed and developed by using its shell buckling performance. This hinge structure has unique mechanical properties. It can use the elastic strain energy accumulated during folding to realize the automatic expansion of the structure without the need for other power devices; after unfolding, it can rely on its own rigidity to provide the required large-scale expandable structure. The locking force, without the need for additional locking device. This kind of hinge can be used in large aerospace deployable structures, such as deployable solar wings. The geometric elements and material properties of the steel tape spring. The geometric shape of the steel tape measure is an open cylindrical shell with a certain length. Its geometric elements include the tape thickness t, the radius of curvature R, the angle day and the length L. These geometric elements will affect the mechanical properties of the tape measure. The main material properties related to mechanical properties include elastic modulus E and Poisson's ratio. In the following analysis process, we used the modulus of elasticity E as, Poisson's ratio is 0.3. The hinge-driven solar wing unfolds very smoothly, but the torsional rigidity of the hinge after bending is insufficient and needs to be improved. In addition, because the elastic modulus of the steel tape material is not large and its driving force is limited, it is still difficult to use it in large-scale solar panels. Because there is a large gap in the hinge, which will produce a large vibration, the structure of the hinge needs to be improved. 2. HOW TO USE TAPE MEASURE CORRECTLY? How to use the steel tape measure: When measuring, the zero scale of the steel tape measure is aligned with the starting point of the measurement, and appropriate tension is applied to directly read the scale on the ruler corresponding to the end point of the measurement; when using the tape measure, the "0" point end should be used as the measurement reference. It is easy to read; when measuring items with the non-“0” point as the benchmark, pay special attention to the number at the beginning, otherwise it is easy to read errors when reading. In some parts where the steel tape measure cannot be used directly, you can use a steel ruler or a square ruler to align the zero scale with the measuring point, and the ruler body is consistent with the measuring direction. Use the tape measure to measure the distance to one end of the steel rule or square ruler and read directly . 1. Before measurement, check whether the certificate label of the steel tape is clear. Confirm whether the tape is within the validity period. The use of tape measures that are not within the validity period or whose identification is not clear is prohibited. 2. The starting end of the workpiece to be measured should be free of burrs to ensure the accuracy of the measurement. 3. There should be no rust and obvious spots or scratches on the surface of the ruler, and the lines should be very clear. 4. Check all parts of the tape measure. When pulling out and retracting the tape measure, it should be light, flexible and free from jamming; when braking, the button device of the tape measure should be able to effectively control the tape rewinding, and there should be no blocking failure. 5. The tape can only be rolled up and cannot be folded; when using the tape measure, do not pull out the tape measure too hard, but slowly pull it out, and let it return slowly after use; when you brake the tape measure, you should first press the system Press the button, and then slowly pull out the tape, press the brake button after use, the tape will automatically rewind; when the tape is automatically reeled, prevent the tape from hurting people.