Method and apparatus for producing helically-wound lock-seam tubing with reduced lubrication

A helical and equipment technology, which is applied in the production field of helically wound seamed pipes, can solve the problems that standard parts and pipes cannot be adapted, the pipe diameter increases, and the sealing performance is damaged.

Inactive Publication Date: 2002-03-13
LINDAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] A particular disadvantage is that excess oil in the crimp seam can cause the tube to "spin" or slip during shipping and handling
As a result of this spin, the diameter of the tube increases, compromising sealing performance and causing standard parts to not fit the tube

Method used

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  • Method and apparatus for producing helically-wound lock-seam tubing with reduced lubrication
  • Method and apparatus for producing helically-wound lock-seam tubing with reduced lubrication
  • Method and apparatus for producing helically-wound lock-seam tubing with reduced lubrication

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Experimental program
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Embodiment Construction

[0027] best practice

[0028] As shown in Figure 1, a drive roller 11 feeds a metal strip 12 (arrow A) through an edge forming combination of a plurality of rollers 13 forming longitudinal edge portions 16a, 16b. In a known state, a metal strip 12 is formed and helically wound in a forming head 14 to produce a tube 15, which has nip rolls 17-19 for the tube 15 output from the forming head 14 (arrow B). Forming the hemming seam 25 is the same as usual, and a pair of guide plates 20 are disposed between the driving roller 11 and the forming head 14 .

[0029] A supply pipe 30 for supplying lubricant, such as oil, to the metal strip 12 is arranged below the edge forming assembly 13 , and the pipe 30 is connected to an oil supply 31 . Preferably, a similar oil pipe 32 and oil supply 33 are also arranged after the drive roller 11, as will be discussed below.

[0030] exist figure 2 It can be seen that the oil pipe 30 is located at the edge 16a, which becomes a Z shape in the edg...

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Abstract

The invention provides a method and an device, with which, a spiral wrapped seam pipe can be made (15) by a metallic tape (12) with lengthwise sides (16a, 16b). In the method, the tape (12) is fed into a moulding head (14) and is shaped to be spiral. Lubricant (34) is supplied partially on the side of the tape corresponding to the side on which the pipe is formed (12). The lubricant is just applied on the limited positions of the width of the tape (12).

Description

technical field [0001] This invention relates to the production of helically wound seamed pipe, and more particularly to methods and apparatus for such production with less lubrication. Background technique [0002] Known machines for producing helically wound crimped pipes include, for example, the machines disclosed in British Patent Publication GB-2,213,748 and U.S. Patent No. 4,706,481. These machines are already known to those skilled in the art, so there is no need to repeat them To describe in detail, improved versions of these machines are also commercially available, but these machines still suffer from certain disadvantages as described below. [0003] In order to withstand corrosion, the metal strip used in the manufacture of this product is usually galvanized metal strip. Galvanizing metal strips leads to a number of problems well known to those skilled in the art. [0004] When the metal strip is edged on the roll set before the head is formed, small pieces of...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B21C37/12
Inventor康尼·彼得松唐纳德·尼古拉松
OwnerLINDAB