|
发表于 2010-5-23 19:30
|
显示全部楼层
来自: 中国浙江宁波
Two of the hull fire workers correction technological requirements.
(a) to correct the working state of former request
(1) the welding of t-shaped, base and the component i-section orthodontic should aboard before installation.
(2) (except) or rigid deficiencies in the period from the womb, should be corrected before. Will is the former. The internal structure of the assembly and welding work must end.
(3) not only for welding or execute the structure, not to fire workers.
(4) correction of single rigid structure, insufficient attention must be paid to do. Temporary
(5) before the correction, want to consider the workpiece machining status was. Cold plate internal stress. So when the cold pull orthodontic contraction generally less than a hot-working plate
(6) components should be made before orthodontic work before installation.
(7) when working environment temperature below - 10 degrees, should stop to correct operation.
(8) (especially in summer when outdoor correction should be considered for deformation of rizhao).
(2) for general correction request.
(1) according to the structural materials properties, deformation and technical requirements, choose reasonable correction scheme and correction coefficient. In the form of the structure of rigid very closed heating circle (such as "well" glyph "back" glyph and "eye" shaped)
(2) to avoid the local heat caused by piecewise cubic or ship deformation, correct operation of symmetrical
in hull should as far as possible and neutral axis line. At the height of the direction should be
(3) in the correct picture for deformation, adjacent to a painting should be interval (also called "jump"), so the range between deformation degree will be spared because of two adjacent to the board of contraction and reduce to accelerate.
(4) in the correction of two adjacent rigid structures, should first correction of components, namely the rigidity of component section thickness or first correction of structure,
(5) in the same structure of two adjacent correction, should first when the deformation of the little deformation correction
(6) in a plate of deformation correction and corrective lows, gradually to the first peak.
(7) when the weak structure, first correction adjacent strong structure, weak after correction. If the thickness plate connected, correction in the correct thin plate
(8) in the correct plate frame structure, should first correction, the deformation of the aggregate after correction of steel plate deformation
(9) with different directions of plate frame deformation, should first correct direction of skeleton sunken deformation, the deformation of the protruding after correction
(10) in the correction of the board, cannot wave distortion of the board or the concave convex point as the datum, and should be corrected by middle surface as the datum.
(11) in the hole, or freedom with correction on the edge of the plate frame structure, should first correction, the deformation of the panels after correction of hole or free edges. ,
(12) from the womb of superstructure inversion subsection, should first before flowing over for the next mouth (after) by flat
(13) orthodontic superstructure internal wall deformation, first under the walls of orthodontic wai deck deformation.
(14) in the correct ship hull plate deformation, hull should try to reduce heating area
(15) when the correction of the heating plate at a slower speed, should constantly changes, swinging heating position and pressure of oxygen flame shoulds not be too tall.
(16) when the correct thickness is less than the plate, if 5mm to knock, should use wooden hammer, not too.
(17) in the weld on heating or percussion. In welding heat affected zone (about 50 - the weld 30mm range) should also try to avoid knock, knock, if must be in position to take groove welding mat flat hammer
(18) correction, with the speed of hammer with lower temperature and slow, striking position also gradually moving to the outer by heating. For steel, in heating area in (about 550 degree - 600 ° c) to handle (hot steel without drama about 250 degrees - 300 degrees) this temperature range, belongs to the so-called "fragile" area, should suspend percussion.
(19) when the correct heating, need to be repeated many times when heated or heat, heat in the last time should be completely cooled heat. The number of low carbon steel heat repeat 5 times, not more than the number of repeat low-alloy steel heat is more than 3 times
(20) and the correct use and in turn, the special materials and correction must first through the test appraisal.
(21) after correction of structure, smooth surface smooth, should strive in striking place, there shall not be uneven residual deformation and the local or printed. Obviously hammer
(22) in the process, must always correct measurement. So too, generate new deformation correction.
(3) fire workers correction note.
(1) the heating temperature usually less than 900 degrees, pull ascend correction effect, adjustable width, but cannot raise tropical heat temperature.
(2) avoid again at the same point in correction, so before heat to consider carefully, careful analysis, the ideal construction scheme
(3) avoid mutations in the structure of fire workers.
(4), should first piecewise correction of orthodontic rigid structures.
(5) correction, should first plane plate, plate frame correction correction
(6) components should be symmetrical, for correction, in order to avoid deformation caused by general.
(7) correction, because for plate heat, flame appropriate adopts neuter flame. In heated swimming will continuously welded torque, in order to avoid surface melting, burn away (oxidation, desulfurization)
(8), can be used to correct thin flame and oxidation move quickly.
(9) of the stainless steel. Alloy etc unfavorable use oxidation flame. |
|