The processing of membrane structure The main processing flow of membrane structure includes: feeding y material opening y inspection y assembly welding y rust removal y number packaging y factory. Among the matters needing attention are: the material must have a material qualification certificate. According to the length of each bar calculated by the designer, the bar specifications are classified and stacked to facilitate the next construction. According to the dimension of the film tube, considering the influence of wall thickness and groove, the automatic cutting machine is used to automatically cut the intersecting line. In the welding process, in order to minimize the adverse effects of stress concentration at the node, the connection weld between the branch pipe and the main pipe shall be welded continuously and smoothly throughout the circumference. If there is a butt weld in the main pipe, Yingkou shall plan the groove to ensure the penetration of the weld. The quality inspection professional shall carry out ultrasonic flaw detection on the welds. If unqualified welds are found, marks shall be made and the welders shall be notified in time for rework. The main truss and the secondary truss shall be pre-assembled to form a unit group and numbered. Dry sandblasting and derusting shall be carried out on the surface of the component, and the oily anti-rust primer shall be brushed twice, and then the surface finish shall be applied. membrane structure shed
3.2 The main processing flow of membrane structure includes: feeding, y inspection, y cutting of membrane material, y arrangement and lofting of number, y initial adhesion of membrane, y splicing and y packaging of membrane material. Because the cutting and packaging process of the film material is more complex, various angles change more, and the processing accuracy is very high, so in the production process to strengthen quality management, to ensure the production accuracy.
After inspection, the membrane material shall be transported into the cleaning workshop where dust has been removed. In the blanking area, layout lofting area, docking area and the junction of the three areas, soft plate glue is paved to prevent the diaphragm from directly contacting the ground and prevent abrasion or soiling of the membrane material. Personnel entering the workshop must wear clean clothes, change into soft slippers for the workshop or wear only socks.
Sample 20 groups of diaphragm and back-to-back strip samples, using a 60mm wide docking knife, to determine 4 groups of different docking temperature, current, pressure knife time, docking after the two-way pull-off test, to obtain the best force and appearance of the docking data, fill in the determined data posted on the docking machine for docking. The thermal fusion scheme should be determined according to the drainage direction and the diaphragm connection node. Before the formal heat treatment, welding test shall be carried out to ensure that the strength of the welding place is not lower than that of the base metal. High frequency heat machine is in the high frequency electric field under the action of high frequency oscillation of the membrane material polymer compound between the intense movement of the heat generated by the bonding.
Diaphragm blanking shall go through three procedures in sequence: read the coordinates of the cutting design and take points; Check the coordinates and draw the blanking line. Re-check the coordinates and drop the knife to blanking. Then attach the number label and lift it to the setting-out area. Since the cable and membrane structures are usually spatial curved surfaces, clipping is to represent spatial curved surfaces with planar membrane materials. This method of fitting spatial curved surface with plane film material is bound to have errors, so it is quite necessary for cutting personnel to add some remedial measures in the process of film cutting. The cut diaphragm shall be re-measured and numbered respectively, and the measured deviation value shall be recorded in detail. The folding and bending of the membrane body shall be avoided as much as possible during the cutting operation, so as to avoid the bending and folding damage of the membrane body and the wrinkling of the membrane surface, which will affect the appearance of the building.
In the lofting area, lofting all the diaphragms of the completed blanking membrane unit, and marking the stitching line after checking that they are correct. Use a soft cotton cloth to wipe the membrane and back strips of the barge seams. When connecting the machine, the back-sticking strip is arranged on the lower bottom surface of the membrane. After the membrane is in alignment with the connecting knife, the membrane is pressed flat and stable, so that the membrane does not move during the high-frequency connecting process. Overweight membrane units are subdivided during docking. Finally, small lifting trucks are used to move the membrane blocks and fold the packaging.
Before packaging, a perfect packaging scheme should be determined according to the film characteristics and construction scheme. For example, the film material coated with polytetrafluoroethylene and coated with glass fiber as the base layer can be packaged in a roll, wherein the diameter of the roll core shall not be less than 100mm; For the film body that cannot be rolled into a cylinder, soft filler can be filled in the inner lining of the film body, and then folded and packaged. After the packaging is completed, mark the packaging content, the use part and the folding and unfolding direction of the film body on the outer packaging of the film body.
Engineering Guide