An online welded pipe thread rolling device and its application method
A welded pipe and thread technology is applied in the field of on-line welded pipe thread rolling devices, which can solve the problems of waste of welded pipe heads, large handling workload, low production efficiency, etc., and achieve the effects of improving the yield of finished products, improving production efficiency, and realizing cutting loss.
Inactive Publication Date: 2017-03-29
JIANGXI HONGDU STEELWORKS CO LTD
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[0057] Example: such as Figure 1 to Figure 8 As shown, taking the production specification of Φ40mm×1.5mm×3200mm threaded pipe as an example, the helical pitch is 45mm to demonstrate the specific implementation process.
[0058] 1. Production line debugging:
[0059] 1) Operate and debug the equipment of the welded pipe unit and the entire production line of the device, and confirm that the equipment is in good condition;
[0060] 2) Loosen the connecting screw 14 above the angle adjustment seat 304, align the zero mark of the angle adjustment seat 304 with the zero mark line on the screw connector 302, and tighten the fastening screw 14;
[0061] 3) Take a Φ40mm×1.5mm sample tube and put it between the eight-roller straightening machine and the fixed-length flying saw through the hollow shaft 207, and loosen the nuts 303 on the screw connecting piece 302 one by one, so that each rolling head 306 touches lightly sample tube, then tighten the nut 303, start and adjust the st...
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The invention discloses an online welded pipe thread rolling device and a using method thereof. An input shaft of a gear box is externally connected with a belt wheel, and an output shaft of the gear box is connected with a hollow shaft through a gear; one end of a rotating disc connecting piece is connected with a flange plate on the hollow shaft, T-shaped sliding blocks of a rolling mechanism are installed in T-shaped sliding grooves formed in the other end of the rotating disc connecting piece in a clamped mode; a long arm of a guide rack is connected with an air cylinder shaft connector, a short arm of the guide rack is connected with a support, and a connecting rotating shaft penetrates through a central through hole and is internally connected with a guide disc; the inner circle of the guide disc is connected with the rotating disc connecting piece through a flat key; two or more connecting rod mechanisms are arranged, one end of each connecting rod mechanism is connected with a lug on the side edge of the guide disc, and the tail end of each connecting rod mechanism is connected with a pin hole in the rolling mechanism through a hinge pin. The hollow shaft is made to rotate through mechanical power of a welded pipe unit, the rotating disc connecting piece is driven to rotate, and then the rolling mechanism is driven to rotate around a welded pipe, rolling heads are made to make contact with the surface of the welded pipe, and rolling is completed. Continuous production equipment for the spiral welded pipe is high in production efficiency.
Description
technical field [0001] The invention relates to the manufacturing technology of welded pipe threads, in particular to an on-line welded pipe thread rolling device and its application method. Background technique [0002] The welded steel pipe with threads rolled on the pipe body (referred to as welded pipe) has a good heat dissipation function due to the spiral raised indentation formed inside, so it is widely used in heat exchangers. The existing manufacturing method is divided into two steps, that is, firstly, the parent pipe is manufactured on the welded pipe unit, and after preliminary sawing to length, it is transported to the thread rolling equipment for rolling of the pipe body thread. Since the length of the welded pipe after rolling the thread will shrink, the parent pipe should have a margin. Like this, also need to carry out the cut-to-length for the second time to the welded pipe after rolling thread, not only production efficiency is low, and handling workload ...
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IPC IPC(8): B21C37/20B21C37/08
Inventor 郑江淮王信斐陈凤保冉辉徐斌
Owner JIANGXI HONGDU STEELWORKS CO LTD