These machines are the first in the world to produce tubes with varying cross sections in just one continuous cycle, the manufacturer says. According to the company, the first tube manufacturer to use one of these machines has increased the production rate by a factor of 10 while reducing the costs of production. In this application, the machine makes shafts for car seats. Over their length, these shafts feature six sections of three different diameters. The seven-stage cold-forming process, finish rolling, and marking are performed fully automatically by one machine. The tubes leave the machine ready to be installed, requiring no additional machining. All process steps, from the automatic feeding of the input stock out of a high-capacity storage system to the finished tube ready to be installed, are automated. This reduces the need for human intervention and allows for lower tooling costs and the elimination of metal chip scrap. The cold-forming process imparts better tensile strength properties to the tube than hot forming, the company says, and the finished tube has a consistent wall thickness over its entire length, even at the transitions between different cross sections.


AMBA - Aachener Maschinenbau GmbH
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With a throughput rate of up to 40 pieces per minute, this machine achieves a much higher efficiency than machines of conventional designs. Double thick-end spokes, i. They save weight and reduce windage. The blanks for this type of spokes cannot be manufactured by drawing or upsetting. The new spoke-blank reducing machine developed by AMBA reduces the spoke diameter between the ends by rolling to a defined smaller diameter over a freely adjustable length.
Machinery for metal cold forming
Our BoltMaker combines two-step heading, reducing, pointing and thread-rolling as completely automatic high-speed applications in one machine, independent of the length of the products, without any additional handling — a major advantage against any combination of separate units. For bending of gas-pipes, water-pipes, tubes for gasoline-stations and boiler-tubes we supply hydraulic tube benders consisting of frame, counter-brackets and hydraulic pump. Alternatively the benders are supplied with an open or hinged frame. The spoke machines of the fi rst generation were built some 50 years ago. Machines for the straightening of long bolts and screws after heat treatment have been part of our production programme for many years. These machines are designed to straighten the screws and bolts in the thread-free shank area only. Press Releases. Product Categories. About 50 years ago AMBA started manufacturing machines for production of spokes and nipples for bicycles and motorbikes. Based on these products the first AMBA boltmaker was developed.
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