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Method for continuously rolling copper pipe through planetary pipe mill

A planetary tube rolling mill, copper tube technology, applied in the direction of metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of rolling tube quality, different feeding force and speed, and larger pitch, etc. The effect of increasing production and facilitating technological transformation

Pending Publication Date: 2022-02-18
JIANGSU XINGRONG HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the two tube billet feeders have their own drive systems, the parameters of the two drive systems can be designed to be the same in order to ensure synchronization, such as the same motor power, the same speed ratio of the reducer and the same chain sprocket parameters , but due to the large difference in the feeding length and the different force application methods of the two billet feeding machines, the actual feeding force and speed acting on the billet are different
When the two billet feeding machines are handed over, the rolling state will change due to the asynchronous feeding parameters, which may cause quality problems of the rolled tube, and in severe cases, it will cause impact and twist the copper tube, causing the rolling state to fail stable
In addition, long-distance chain feeding will also cause many practical problems
Chain transmission itself is not a precision transmission technology. Long-term operation will cause wear between the sprocket and the chain, which will increase the pitch, cause problems such as chain lengthening and chain climbing, and the feeding accuracy will become worse.
The wear of the chains of different lengths of two tube billet feeding machines with different lengths will also vary greatly, which will cause a large equipment maintenance problem after a period of use

Method used

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  • Method for continuously rolling copper pipe through planetary pipe mill
  • Method for continuously rolling copper pipe through planetary pipe mill
  • Method for continuously rolling copper pipe through planetary pipe mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] figure 1 It is a schematic diagram of the principle of the top view of the planetary pipe rolling mill for continuously rolling copper pipes in Embodiment 1 of the present invention, figure 2 for figure 1 A-direction view, image 3 for figure 2 The B-B view.

[0046] Embodiment 1 adopts a roller feeder as a tube billet feeder, figure 1The middle roll feeding machine 701 is placed at the entrance of the planetary rolling mill 2, and its structure is a two-stand pair-roll feeding structure. The motor 9 , the reducer 7 and the gear 11 drive the respective feed rollers 10 to rotate, and the conductive slip ring 15 transmits power to the motor 9 . The outer diameter of the feeding roller 10 is processed with a semicircular pass, so that it can fit closely with the outer diameter of the tube blank. A set of pressing device 14 compresses the feeding roller 10 and the tube blank 5, so that the roller feeder 701 can continuously feed the tube blank 5 one by one into the ...

Embodiment 2

[0054] Figure 4 It is a schematic diagram of the principle of the top view of the planetary pipe rolling mill for continuously rolling copper pipes according to the second embodiment of the present invention, Figure 5 for Figure 4 A-direction view, Image 6 for Figure 5 C-C view of . Embodiment 2 uses a crawler feeder as the billet feeder. The crawler feeder 702 plays the same role as the roller feeder 701. The feeder 702 can continuously and stably provide the feeding force for the billet 5, and also It can be passively rotated around the center line P-P driven by the tube blank.

[0055] First, the crawler feeder 702 is also placed at the entrance of the rolling mill, and there is only one feeder. Two chains (tracks) 53, two main sprockets 51, and two auxiliary sprockets 55 are installed on the crawler belt rotating frame 56 to form the main structure of the crawler belt feeding machine. Two chains have respective drive unit motor 9 and speed reducer 7. A briquett...

Embodiment 3

[0057] Figure 7 It is a schematic diagram of continuous feeding of tube blanks at the foreground of a three-roll planetary tube mill in Example 3 of the present invention. Wherein it comprises a material storage feeding rack 71, a fixed feeder 72, a front mandrel holder 73, an intermediate feeder 74, a rear mandrel holder 75, a planetary pipe mill 2 and a roller feeder 701. Among them, the roller feeding machine adopts a double pair of roller structure, the power between the pair of rollers is transmitted by gears, and the butterfly spring is adjusted to control the pressing force of the tube blank. The feeder controls the torque of the motor 9 through the conductive slip ring 15, and the motor 9 applies a constant feed force to the feed roller 10 through the reducer 7, and the feed force is adjustable within 0-30KN.

[0058] For convenience of description, the Figure 7 The key positions in the length direction of the planetary pipe mill are marked as D, E, F, G, H, I, J. ...

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Abstract

The invention relates to a method for continuously rolling a copper pipe through a planetary pipe mill, which is characterized in that a roller type feeder or a crawler type feeder is arranged at an inlet of a three-roller planetary pipe mill and is driven by a pipe blank rolled by the three-roller planetary pipe mill to be in a passive rotating state; the roller type feeder or the crawler type feeder passively rotates and continuously provides a feeding force for the pipe blanks at the same time, and the pipe blanks are continuously fed into the three-roller planetary pipe mill one by one in an end-to-end connection mode to be rolled. By the adoption of the technical scheme, the structure is simple, reliable and practical, the requirement for continuously rolling copper pipes is met, the defects in the prior art are overcome, and production efficiency is improved.

Description

technical field [0001] The invention relates to a method for continuously rolling copper pipes by a planetary pipe mill, and belongs to the technical field of nonferrous metal pipe processing technology. Background technique [0002] Copper tube planetary rolling is a high-efficiency rolling method that uses a large deformation rate in a single pass and heats up the deformation zone to 701°C-850°C through deformation heat, so that the deformed structure can achieve dynamic recrystallization, and finally obtain an equiaxed crystal structure. . [0003] Conventional planetary rolling mills mainly include three-roll planetary rolling mills and four-roll planetary rolling mills, which work intermittently for copper tube rolling. That is, every time a tube billet is rolled, the feeding trolley and the mandrel are returned, the hollow tube billet is turned over from the storage rack to the feeding rack, and then the mandrel is inserted, and the tube billet is sent into the planet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B19/06B21B39/02B21C1/24
CPCB21B19/06B21B39/02B21C1/24
Inventor 祁威田福生朱建秋蒋立飞谈万顺沈思平王月彬杨春源
Owner JIANGSU XINGRONG HI TECH
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