Leifeld serie Necking machine

WARM WORKING OF TUBE ENDS
By means of consistently refining necking-in technology, Leífeld has gathered unique know-how and has invested it continuously in the EN series łor more than 35 years. Todays high-performance necking-in machines are designed specifically łor manufacturing high-pressure gas cylinders. More than 100 assembled and sold machines, operating worldwide, aгe evidence of superior innovations and product quality provided by Leifeld, making the EN series the
world s top-selling necking-in machine. Leifelds customers particularly appreciate the high efficiency due to short cycle times 
PERFECT DESIGN AND EFFICIENT PRODUCTION
Necking-in has its seeds in spinning technology. Leifeld has pioneered in systematically advancing and perfecting necking-in with a swinging  warm working, simple program adaptation provides flexible contour guidance of the working roller. This allows variable cylinder shapes tailored to specific customer needs.
Preforms for necking-in are heated to warm-working temperature using induction equipment outside the necking in machine. An automatic charging device feeds the heated preform to the work spindle and clamps it with a jaw chuck. The working rolter on
the swinging rest works the ends of the rotatíng workpiece to a gastight cylinder bottom or a bottleneck. During warm working, temperature losses in the deformation zone are compensated by a torch. The inclined design of the bed not only provides better stability than a flat bed but also prevents scaling from having
A high-performance necking-in machine is custom-programmed to your demands and integrated into the production line according to your manufaction ring standards. For this, the machine is equipped with a charging and removal device. Additionally, preforms can be łed to the machine with an optional auto- matic feeding portal.
A standard Leifeld necking-in machine includes a Siemens CNC-control.

Leifetd machines impress with remarkably consistent quality. Thanks to years of experience with necking-in technology and a drive for innovation, our EN machines have high forming speeds, short cycle times and top production reliability. it s not uncommon for our customers to still be using our main spindle bearings more than 25 years after purchase. Machine lifespan is decisively improved by extremely robust design and in-house production of the most important components. Our necking in machines are also protected against external influences such as heat and scale.
The EN series is customisable forworkpieces in different materials and various lengths with a diameter of 75 to 720 mm. The machines horizontal design faciliates oasy access, in turn allowing tools to be quickly and simply replaced. Your staff will receive intensive operational training from our qualified technical personnel.
The EN series most significant benełit is speed: rapid feed rates and loading/unloading units provide extremely short production process cycle times. Take advantage of the potential savings afforded by our cost-effective process to make a quick, гetiable return on investment.
Our necking-in machines are also equipped with a modern online fault diagnosis system, allowing real-time support from
our global customer service. You Ll receive help from experienced service technicians and specialist, especially in the procurement of spare parts from our extensive inventory.

The bottom cutting torch is used forgastight sealing of steel tube ends. When
forming the bottom contour, the pole contains slack inclusions. By cutting them
out completely, no contaminated material remains at the pole. The improvement
1. Bottorr cuttıng torch
2. Loadıng and untoadfng unit of material joining produces a fine-grained material structure.
FN ЅFR1E5 1N OPERATION
PRODUCT FIELDS OF APPLICATIÚN5
CNG cylinders Automołive
High-pressure gas cylinders Petrochemical, chemical, and
health industry
Accumulators Engineering, aircraft construction,
shipbuilding industry
Transport and storage Gas industry
1 YPF _- OUTSIDE
DIAMETER M1N1 DıAMETER ÍMAX
EN 200 only Alu 75 204
EN 300 75 204
EN 500 100 275
EN 600 100 325
EN 600/400 200 406
Left: EN 600/440 230 442
1.-2.Λluminiuirıı,.ylıntl г ł>ııttlεnNi:kiss>hıрcrd EN 600/480 270 480
З. CNG суІіггіг type λ EN 700 300 620 4. Cvtinder hııttlг.n ckн
5.-6. :ylindeı hrıttuıns EN 700/720 400 720

[.Іі]ІfХ.і
.

1 1 .1
r. r r