Since the bottom of the design sleeve structure is a figure-shaped hole, and the top of the bolt is T-shaped, the connecting bolt must be rotated 90 degrees before the connecting bolt is tightened, so that the connecting bolt and the bottom of the sleeve form a cross shape to tighten the bolt. After the base is adjusted, aligned, and inspected, the archway is hoisted. At this time, the M100*3000 bolt is exposed on the plane of the base. Therefore, measures must be taken to protect the threaded bolts so as not to hurt the thread buckle during the hoisting process of the archway. After the hoisting of the archway is completed, the archway can be corrected. Before aligning, first put the M100*3000 connecting bolt bolt with the strength, so as not to be offset when the arch is found, and the connecting bolt can be tightened after the arch is found and the inspection is correct.
The connecting bolt must be adjusted at an angle before it is energized, that is, rotated 90 degrees to form a cross and firmly hung in the sleeve. At this time, the nut can be tightened and tightened. According to the pitch of the bolt provided by Hitachi and the length and tension of the bolt, the angle of rotation of the nut can be calculated. According to the angle of rotation of the nut, the degree of connection and fastening can be known. Before fastening, use a medium-sized hammer (18 lbs) and tighten the four connecting screws of each arch once in a diagonal manner to make four The force point is evenly stressed and marked as a starting point (ie 0 degrees).
According to the calculated angle value, the part to be marked is 0 degree. Because the nut is hexagonal, each square is 60 degrees, which means that the nut rotates 2". The square can achieve the angle value calculated by the rotation of the nut. After the mark is completed, the fastening can be performed. The heavy hammer must be tightened diagonally. After each connecting bolt is fastened, tighten the second nut of each connecting bolt. Use a medium-sized hammer. Then attach the connecting bolt guard and connect the bolt. The fastening work is completed. The above method can be used firmly in other cooling assembly connecting nuts. As long as the bolt pitch, bolt angle and thread coefficient are known, the calculation formula can be used to calculate the angle of rotation of the nut to achieve the design requirements. The degree of bolt fastening.
The UPVC sliding door is simply a sliding door made of steel added inside the UPVC profiles. Specifically, UPVC is added with a certain proportion of stabilizers, colorants, fillers, ultraviolet absorbers, etc., and is extruded into a molding material, and then made into a door and window frame fan by cutting, welding or screwing, and is equipped with a sealing strip. , tops, hardware, etc., at the same time to enhance the rigidity of the profile, the steel lining (reinforced ribs) need to be filled in the cavity of the profile beyond a certain length, so that the sliding door is called a plastic steel sliding door.
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