A method for preventing thread pairs from sticking when large-diameter threads are disassembled
A thread pair and large-diameter technology, which is applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of thread pair sticking and sintering, thread cannot be disassembled, and thread pair friction is large, so as to avoid sticking and reduce friction. The effect of small friction
Active Publication Date: 2016-08-24
BAOJI PETROLEUM MASCH CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to provide a method for preventing thread pairs from sticking when large-diameter threads are disassembled, which solves the influence of the equipment's own weight in the prior art, which causes large friction between thread pairs and prevents thread pairs from sticking. Sintering, which eventually leads to the problem that the thread cannot be disassembled
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[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] refer to figure 1 , the structure of the dismounting mechanism adopted by the inventive method is that the male thread workpiece 11 and the female thread workpiece 12 are vertically aligned, and the male thread workpiece 11 is on the top, and the female thread workpiece 12 is on the bottom; There is a liquid cylinder base 4, and a supporting liquid cylinder 2 is installed on the liquid cylinder base 4. The piston rod 8 of the supporting liquid cylinder 2 is upwardly connected with the support frame 1 by a spherical hinge. connected; the oil inlet of the support cylinder 2 communicates with the constant pressure variable pump 9 and the overflow valve 10 at the same time, and the connecting pipeline between the support cylinder 2 and the hydraulic control system 3 is led out through the base 4 of the hydraulic cylinder. Pressure variabl...
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The invention discloses a method for preventing a thread pair from sticking in dismounting and mounting of large-diameter threads. The method comprises the steps that an overflowing valve is adjusted to enable the supplied pressure of a hydraulic-control system to be slightly less than the weight of a pin thread component during screwing threads, then excessive hydraulic oil in a supporting hydraulic cylinder overflows through the overflowing valve, and accordingly, a piston rod slowly retracts and a supporting frame lowers down, the pin thread component is lowered down and slowly rotated at the same time, and the pressure of the hydraulic-control system is kept unchanged; when dismounting the threads, the pressure of a constant-pressure variable pump is regulated to enable the supplied pressure of the hydraulic-control system to be slightly more than the weight of the pin thread component, the piston piton slowly extends out, the constant-pressure variable pump synchronously supplements hydraulic oil as the piston rod extends out, and accordingly, the supporting frame raises, the pin thread component is slowly rotated to upwards move to be separated from a box thread component, and the pressure of the hydraulic-control system is kept unchanged. The method is simple and easy to be carried out, and the force is uniformly applied to the threads, so that the threads are difficultly damaged and stuck.
Description
technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and is used for preventing thread pair sticking when disassembling and assembling large-diameter threads, especially large-diameter and heavy-loaded large-scale threads. Methods. Background technique [0002] Threaded connection is a commonly used connection method between various parts in mechanical equipment. It is widely used because of its many advantages such as convenient disassembly and assembly, large load capacity, and good neutrality between connecting parts. Although the threaded connection has many advantages, in the disassembly process of some large-diameter, heavy-duty threads, due to the influence of the self-weight of the equipment itself, there is a poor alignment when the horizontal butt joint is fastened, and at the same time, due to the influence of the external dimensions of the connecting parts, the equipment cannot be clamped. It is not easy to operate; wh...
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IPC IPC(8): B23P19/04
CPCB23P19/06
Inventor 王秉武张彩莹雷广进侯晓东陈叶淮超向明余
Owner BAOJI PETROLEUM MASCH CO LTD